CN201077130Y - Open type glue-smelting machine - Google Patents

Abstract

The utility model relates to a rubber mixing machine. The open type rubber mixing machine has two variable frequency speed regulating motors, each motor is connected to a gear reducer through its own coupling, and each gear reducer is connected to the roller through a universal coupling. And the motor terminal of the first frequency converter of the circuit device is connected with the power supply terminal of the first variable frequency speed regulating motor; the motor terminal of the second frequency converter of the circuit device is connected with the power supply terminal of the second frequency conversion speed regulating motor; the speed regulation of the circuit device The control circuit is bridged between the first frequency converter and the second frequency converter; each control signal output end of the frequency converter control circuit is connected with corresponding ports of the first frequency converter and the second frequency converter. The open rubber mixing machine of the utility model can conveniently adjust the speed ratio between the front and rear rollers during use, and the total energy consumption of the rubber mixing machine is reduced, the transmission efficiency is improved, and the noise is reduced, and the use and maintenance are more convenient and the service life is longer. also extended accordingly.

Description

Open rubber mixer

technical field

The utility model relates to a rubber mixing machine, in particular to an open rubber mixing machine.

Background technique

In the open type rubber mixing machine widely used in the rubber and plastic machinery industry, the front and rear rollers rotate relative to each other at different linear speeds (fixed speed ratio), and the rubber material is pulled into the two rollers under the action of friction During the period, as the gap between the two rollers narrows, the rubber material is strongly squeezed and sheared, and the rubber macromolecules are oxidized and broken at the same time as the mechanical chain is broken, thereby increasing the plasticity and achieving the purpose of rubber mixing.

The open type rubber mixing machine that uses at present has frame and the motor that is installed on the frame, deceleration device, a pair of rubber mixing rollers, belt transmission mechanism and a pair of speed ratio gears. One end of the rear roller is fixed with a driven pulley, and the other end is fixed with a speed ratio gear; one end of the front roller is fixed with another speed ratio gear which meshes with the speed ratio gear on the rear roller. The power output shaft of the motor cooperates dynamically with the power input part of the reduction device. The drive pulley is fixed on the power output shaft of the reduction device. The drive pulley transmits power to the driven pulley fixed on the rear roller through the belt. The roller transmits power to the front roller through a pair of speed ratio gears meshing with each other. And for the closed centralized drive mill, its motor directly drives the front and rear rollers to rotate at a certain speed ratio through a large closed gear reducer and a universal coupling. This structure cancels the driving gear and the speed ratio gear, and replaces it with a large closed gear reducer.

In the prior art, there is also an open rubber mixer specially used for breaking rubber (referred to as rubber breaking machine), which is slightly different from the above structure. Since the rubber breaking process does not have strict requirements on the speed ratio, this transmission arrangement omits the The speed ratio gear between the front and rear rollers, the speed ratio between the front and rear rollers is provided by the friction between the front and rear rollers and the rubber material, and the speed ratio changes indefinitely, which is called the free speed ratio.

All the transmission arrangements mentioned above can effectively ensure a constant speed ratio between the front and rear rollers except for the rubber breaker, but when the rubber material or process requirements change, the speed ratio between the front and rear rollers cannot be easily adjusted. Adjustment. For the rubber breaking machine, although the transmission arrangement adopts the free speed ratio because the speed ratio is not strict, the speed ratio between the front and rear rollers in this state is completely determined by the friction between the roller and the rubber material. It cannot be accurately controlled, and once the rubber material or process requirements change, it cannot be adjusted at all.

With the development of the rubber and plastics industry, especially the continuous development of reclaimed rubber and reclaimed rubber powder production technology, various production processes have been continuously tested and improved, and new breakthroughs have been made, so that the production process's demand for roller speed ratio is no longer static . These developments have put forward new requirements for rubber and plastic machinery, especially open rubber mixers. The fixed speed ratio or free speed ratio between the front and rear rollers that cannot be adjusted accurately and instantly cannot meet the production process requirements.

Utility model content

The purpose of the utility model is to provide an open rubber mixing machine which can conveniently adjust the speed ratio between the front and rear rollers during use.

The technical solution adopted by the utility model to solve the technical problems is: the rubber mixing machine has a frame, a motor, a circuit device, a gear reducer, a pair of rubber refining rollers with bearings fixed thereon, and a group of roller bearing seats; The frame has a left bracket, a right bracket and a base; the left bracket and the right bracket are fixed on the base to form a bracket; the motor and the gear reducer are fixed on the base, and two roller bearing seats are respectively installed on the left bracket and the right bracket; The rollers are divided into front rollers with fixed bearings and rear rollers with fixed bearings. The front rollers and rear rollers are respectively connected to the corresponding roller bearing seats fixed on the left bracket through their respective bearings and fixed It is located on the corresponding roller bearing seat on the right bracket, and the front roller and the rear roller are set relatively parallel; its structural features are: there are two motors, both of which are frequency conversion speed regulation motors, and they are the first frequency conversion speed regulation motors. The motor and the second variable frequency speed regulating motor; there are also two gear reducers, which are the first gear reducer and the second gear reducer; the first variable frequency speed regulating motor is connected to the first gear reducer through the first coupling, and the second The first gear reducer is connected to the front roller through the first universal coupling; the second variable frequency speed regulating motor is connected to the second gear reducer through the second coupling, and the second gear reducer is connected to the second universal joint The shaft device is connected to the rear roller; the circuit device has a first frequency converter, a second frequency converter, a speed control circuit, a power circuit, a frequency converter control circuit and a three-phase power input switch; the power terminal of the first frequency converter and the second The power terminals of the inverter are respectively connected to the power output terminals of the three-phase power input switch through the corresponding main power wires; the motor terminals of the first inverter are connected to the power terminals of the first variable frequency speed regulating motor; It is connected with the power supply terminal of the second frequency conversion speed regulating motor; the speed control circuit is connected between the first frequency converter and the second frequency converter; the power input terminal of the power supply circuit is connected with the power output terminal of the three-phase power input switch; the power supply The power supply output terminal of the circuit is connected with the power supply terminal of the frequency converter control circuit; each control signal output terminal of the frequency converter control circuit is connected with the corresponding ports of the first frequency converter and the second frequency converter.

The above-mentioned speed regulation control circuit has a first potentiometer SR1, a second potentiometer SR2 and a synchronous speed regulation potentiometer SR3; one end of the synchronous speed regulation potentiometer SR3 is connected to a frequency converter in the first frequency converter and the second frequency converter The output end of the first DC power supply in the terminal is connected, the other end of the synchronous speed regulating potentiometer SR3 is electrically connected with the zero potential end of the control terminal of the frequency converter, and the adjustable end of the synchronous speed regulating potentiometer SR3 is connected with the first One end of the potentiometer SR1 is connected to one end of the second potentiometer SR2; the other end of the first potentiometer SR1 is electrically connected to the zero potential end of the control terminal of the first frequency converter, and the adjustable end of the first potentiometer SR1 is connected to the second The analog signal input terminal used to receive the speed control signal in the control terminal of a frequency converter is connected; the other end of the second potentiometer SR2 is electrically connected with the zero potential end of the control terminal of the second frequency converter, and the second potentiometer The adjustable end of SR2 is connected with the analog signal input end for receiving the speed control signal among the control terminals of the second frequency converter. One end of the first potentiometer SR1 connected to the zero potential end of the control terminals of the first frequency converter is connected to one end of the second potentiometer SR2 connected to the zero potential end of the control terminals of the second frequency converter.

The above frequency converter control circuit has a rotation control circuit; the rotation control circuit has a normally closed button switch SB2, a rotation extrusion control circuit and a jog return control circuit; one end of the normally closed button switch SB2 is connected to the power supply end of the frequency converter control circuit; The squeeze control circuit is provided with the normally open button switch SB3 connected in series, the normally closed third contact switch KA2-3 of the second relay KA2 and the coil of the first relay KA1; Open button switch SB4, the normally closed fourth contact switch KA1-4 of the first relay KA1 and the coil of the second relay KA2; the other end of the normally open button switch SB3 is connected with the other end of the normally open button switch SB4; the first The other end of the coil of the relay KA1 is connected to the other end of the coil of the second relay KA2, and their common contact is connected with the power ground of the power supply circuit; the two ends of the normally open button switch SB3 are connected in parallel with the second end for self-protection on state. The normally open third contact switch KA1-3 of a relay KA1; the other end of the normally closed push button switch SB2 is connected to the common contact of the normally open push button switch SB3 and the normally open push button switch SB4. The first relay KA1 also has a normally open first contact switch KA1-1 and a normally open second contact switch KA1-2; one end of the first contact switch KA1-1 of the first relay KA1 is connected to the first frequency converter The second DC power supply output terminal in the control terminal is connected, and the other end is connected with the digital signal input terminal for receiving the forward rotation control signal in the control terminal of the first frequency converter; the second contact of the first relay KA1 One end of the switch KA1-2 is connected to the output end of the second DC power supply in the control terminal of the second frequency converter, and the other end is connected to the digital signal input end for receiving the forward rotation control signal in the control terminal of the second frequency converter connected. The second relay KA2 also has a normally open first contact switch KA2-1 and a normally open second contact switch KA2-2; one end of the first contact switch KA2-1 of the second relay KA2 is connected to the first inverter The second DC power supply output terminal in the control terminal of the inverter is connected, and the other end is connected with the digital signal input terminal for receiving the reverse rotation control signal in the control terminal of the first frequency converter; the second contact of the second relay KA2 One end of the switch KA2-2 is connected to the second DC power supply output end in the control terminal of the second frequency converter, and the other end is connected to the digital signal input end for receiving the reverse rotation control signal in the control terminal of the second frequency converter The motor terminal of the first frequency converter is connected to the terminal of the first variable frequency speed regulating motor in the way of forward rotation, and the motor terminal of the second frequency converter is connected to the terminal of the second frequency conversion speed regulating motor in the direction of reverse rotation. way to connect.

The above frequency converter control circuit also has a braking control circuit arranged between its power supply terminal and the power supply ground of the power supply circuit; the braking control circuit is provided with 2 to 5 normally open button switches connected in parallel and the coil of the third relay KA3 ; These parallel normally open button switches are connected in series with the coil of the third relay KA3 at the same time; the third relay KA3 has a normally open first contact switch KA3-1, a normally open second contact switch KA3-2 and a normally closed The third contact switch KA3-3. One end of the first contact switch KA3-1 of the third relay KA3 is connected with the second DC power supply output end in the control terminal of the first frequency converter, and the other end is connected with the control terminal of the first frequency converter for receiving braking The digital signal input end of the control signal is connected; one end of the second contact switch KA3-2 of the third relay KA3 is connected with the second DC power output end of the control terminal of the second inverter, and the other end is connected with the second inverter The digital signal input terminal used to receive the brake control signal in the control terminal is connected. The third contact switch KA3-3 of the third relay KA3 is connected in series between the common contact of the coils of the first relay KA1 and the second relay KA2 and the power ground of the power circuit.

The above frequency converter control circuit also has a protection control circuit; the protection control circuit has an output relay port and a corresponding built-in switch in the control terminal of the first frequency converter, and an output relay port and a corresponding built-in switch in the control terminal of the second frequency converter. Built-in switch, the common terminal 1A of the output relay port of the first frequency converter is connected with the normally closed terminal 2B of the output relay port of the second frequency converter; the protection control circuit is connected in series with the third contact of the third relay KA3 Between one end of the switch KA3-3 and the power ground of the power supply circuit, that is, the end of the third contact switch KA3-3 of the third relay KA3 is connected to the normally closed end 1B end of the output relay port of the first frequency converter, The common end 2A of the output relay ports of the second frequency converter is connected to the power ground of the power circuit. The above-mentioned frequency converter control circuit also has an alarm device HL2; the normally open end 1C end of the output relay port of the first frequency converter of the protection control circuit is connected with the normally open end 2C end of the output relay port of the second frequency converter; one end of the alarm device HL2 is connected to the The power supply end of the inverter control circuit is connected, and the other end is connected with the protection control circuit, that is, the end of the alarm device HL2 is connected with the normally open end 1C of the output relay port of the first inverter.

The above-mentioned frequency converter control circuit has a reset control loop arranged between its power supply end and the power supply ground of the power supply circuit; the reset control loop of the frequency converter control circuit is provided with a normally open button switch SB5 and a coil of the fourth relay KA4 connected in series; The fourth relay KA4 also has a normally open first contact switch KA4-1 and a normally open second contact switch KA4-2; one end of the first contact switch KA4-1 of the fourth relay KA4 is connected to the first inverter The second DC power supply output terminal in the control terminal of the inverter is connected, and the other end is connected with the digital signal input terminal for receiving the reset control signal in the control terminal of the first frequency converter; the second contact switch KA4 of the fourth relay KA4 One end of -2 is connected to the output end of the second DC power supply in the control terminals of the second frequency converter, and the other end is connected to the digital signal input end for receiving the reset control signal in the control terminals of the second frequency converter.

The above circuit device also has a fast melting circuit, a first braking resistor R1 and a second braking resistor R2; the first braking resistor R1 is connected between the positive terminal of the DC bus of the first frequency converter and the braking resistor terminal; the second The braking resistor R2 is connected between the positive terminal of the DC bus of the second inverter and the braking resistor terminal; the fast fuse circuit is connected between the positive terminal of the DC bus of the first inverter and the second inverter, and the first inverter The negative terminal of the DC bus of the converter is connected to the negative terminal of the DC bus of the second frequency converter.

The diameter of the front roller of the rubber mixing machine is 400-700mm, and the length is 600-1000mm; the diameter of the rear roller is 400-700mm, and the length is 600-1000mm. The preferred diameters of the above-mentioned front roller and the rear roller are both 500mm, and the preferred lengths are both 800mm. Or the preferred diameter of the front roller and the rear roller is 450mm, and the preferred length is 800mm. Or the preferred diameter of the front roller is 450mm, and the preferred length is 800mm, and the preferred diameter of the rear roller is 500mm, and the preferred length is 800mm.

The beneficial effects of the utility model are: (1) the transmission system of the open rubber mixing machine of the utility model is a double-motor transmission, and the motor adopted is a variable-frequency speed-regulating motor, and two frequency-variable speed-regulating motors are respectively connected to one by a coupling The gear reducer is respectively decelerated by the gear reducer, and the front and rear rollers are respectively driven by two universal couplings to rotate at a certain speed ratio. Under the control of the circuit device of the utility model, the speed of the front and rear rollers can be adjusted separately to obtain the speed ratio required by the production process, which solves the problem that the speed ratio between the front and rear rollers of the open rubber mixing machine cannot be adjusted accurately in real time question. (2) The open type rubber mixing machine of the circuit device of the present utility model has canceled the large and small drive gear and speed ratio gear owing to adopted frequency conversion speed regulation structure, makes the total energy consumption of open type rubber mixing machine drop, and transmission efficiency improves, and The noise is reduced, the use and maintenance are more convenient, and the service life is correspondingly extended. (3) When one end of the first potentiometer and the second potentiometer in the speed regulation control circuit of the circuit device of the present utility model are connected to one end of the zero potential end in the control terminals of the respective frequency converters, it is beneficial to control the frequency converter more Stable output of stable frequency and voltage regulation power supply to the frequency conversion speed regulation motor. (4) Due to the use of frequency converter and variable frequency speed regulation motor, the overvoltage and overcurrent of the two motors are protected during the differential speed operation. In the overvoltage state, when only the braking resistor is used, it can be used The energy consumption meets the requirements, and the inverter can be overloaded by 150% to 170% under the condition of overcurrent; when the fast-melting circuit is used, the inverter connected to the driven motor can output energy to another inverter, so that it can be used as the inverter. The work consumption of another frequency converter, so as to achieve the effect of energy saving. Regardless of whether a fast-acting circuit is used, the braking resistor plays a role in absorbing energy during braking. (5) The open-type rubber mixing machine of the utility model can be started with load, which reduces working hours and greatly improves work efficiency, and changes the defects that ordinary rubber mixing machines are cumbersome to operate and cannot be started with load. (6) When the length of the roller of the present invention is limited within the range of 600-1000 mm, it can provide consistent and effective friction, shearing and extrusion forces in the entire length direction, improving the efficiency. Compared with the 1200mm roller length used in the previous general-purpose open mill, the length of the roller is shortened, and the cost is also saved accordingly.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

FIG. 2 is a schematic top view of FIG. 1 .

Fig. 3 is a structural schematic diagram of the front roller and the rear roller in Fig. 2 .

Fig. 4 is a circuit block diagram of the circuit device of the present utility model.

FIG. 5 is an electrical schematic diagram corresponding to FIG. 3 .

The components represented by the labels in the figure are: 11—the first variable frequency speed regulating motor; 12—the second variable frequency speed regulating motor; 13—the first frequency converter, 14—the second frequency converter, 15— Speed control circuit, 16—power circuit, 17—inverter control circuit; 18—three-phase power input switch; 21—first coupling; 22—second coupling; 31—the first A gear reducer; 32—the second gear reducer; 41—the first universal coupling; 42—the second universal coupling; 5—the front roller; 6—the rear roller; 7—Roller bearing seat; 8—Frame; 81—Left bracket; 82—Right bracket; 83—Base.

Detailed ways

(Example 1)

1 and 2, the open rubber mixing machine of this embodiment has a motor, a circuit device, a gear reducer, a pair of rubber mixing rollers with fixed bearings, a group of roller bearing seats 7, and a frame 8. The motor is a frequency-variable speed-regulating motor, and there are two motors, which are a first frequency-variable speed-regulating motor 11 and a second frequency-variable speed regulating motor 12 . There are also two gear reducers, which are the first gear reducer 31 and the second gear reducer 32 . A pair of rubber mixing rollers is divided into a front roller 5 fixed with a pair of rolling bearings and a rear roller 6 fixed with a pair of rolling bearings.

Still referring to FIG. 1 and FIG. 2 , the frame 8 has a left bracket 81 , a right bracket 82 and a base 83 ; the left bracket 83 and the right bracket 82 are fixed on the base 83 to form the bracket 8 . The first variable frequency speed regulating motor 11 , the second frequency variable speed regulating motor 12 , the first gear reducer 31 and the second gear reducer 32 are all fixed on the base 83 . One of the rear roller bearing seats is fixed on the left bracket 81, and the other is fixed on the right bracket 82; one of the front roller bearing seats slides back and forth on the left bracket 81, and the other slides back and forth on the right bracket 82 on.

See Fig. 3, the front roller 5 and the rear roller 6 with the structure shown in the figure are obtained after casting and machining with alloy chilled cast iron. The diameter of front roller 5 and back roller 6 is 500mm, and the length of front roller 5 and back roller 6 is 800mm.

1 and 2, the front roller 5 is rotatably connected to a pair of front roller bearing housings 7 which are slidably arranged on the left bracket 81 and the right bracket 82 through the bearings arranged at its two ends, and the rear roller 6 is arranged on the The bearings at its two ends are rotatably connected on a pair of rear roller bearing blocks 7 fixed on the left support 81 and the right support 82, and the front roller 5 and the rear roller 6 are relatively parallel to each other.

Still referring to Fig. 1 and Fig. 2, the first variable frequency speed regulating motor 11 is connected to the first gear reducer 31 through the first coupling 21, and the first gear reducer 31 is connected to the front roller through the first universal coupling 41 Barrel 5. The second variable frequency speed regulating motor 12 is connected to the second gear reducer 32 through the second coupling 22 , and the second gear reducer 32 is connected to the rear roller 6 through the second universal joint 4 .

Still see Fig. 1 and Fig. 2, the support of the first distance adjusting device 91 is installed on the left bracket 81, and the power output end of this distance adjusting device 91 is fixedly connected with the front roller bearing seat on the left bracket 81: also That is, the first distance adjusting device 91 has a machine base, a rotating disk, a handle, a screw mandrel and a connecting seat, the machine base is fixed on the left support 81, the screw mandrel is pivotally connected with the machine base, and the front end of the screw mandrel is fixedly connected with the rotating disk, and the handle is fixed. On the turntable, the rear end of the screw rod is fixedly connected with the connecting seat, and the connecting seat is fixedly connected with the front roller bearing seat located on the left bracket 81 as the power output end of the distance adjusting device 91, so that it can be driven sequentially by turning the handle by hand. The front roller bearing seat on the left support 81 is controlled by the screw mandrel and the connecting seat to move back and forth.

Still see Fig. 1 and Fig. 2, the support of the second distance-adjusting device 92 is installed on the right support 82, and the power output end of this distance-adjusting device 92 is fixedly connected with the front roller bearing seat positioned on the right support 82: also That is, the second distance adjusting device 92 has a support, a handle, a rotating disk, a screw mandrel and a connecting seat, the support is fixed on the left support 82, the screw mandrel is pivotally connected to the support, and the front end of the screw mandrel is fixedly connected to the rotating disc, and the handle is fixed. On the turntable, the rear end of the screw rod is fixedly connected with the connecting seat, and the connecting seat is fixedly connected with the front roller bearing seat located on the right bracket 82 as the power output end of the distance adjusting device 92, so that it can be driven sequentially by turning the handle by hand. The front roller bearing seat on the right support 82 is controlled by the screw mandrel and the connecting seat to move forward and backward.

See Fig. 4 and Fig. 5, the circuit device of this embodiment is arranged in the electric cabinet, and this circuit device has first frequency converter 13, second frequency converter 14, speed regulation control circuit 15, power supply circuit 16, frequency converter control circuit 17 And a three-phase power input switch 18. The first inverter 13 and the second inverter 14 are Inovance inverters whose model is MD320. The power supply circuit 16 has a transformer circuit T for stepping down 380V AC to 220V AC.

Still see Fig. 4 and Fig. 5, the power supply terminals R, S, T of the first frequency converter 13 and the power supply terminals R', S', T' of the second frequency converter 14 are respectively connected to the three-phase The power output terminals L11, L21 and L31 of the power input switch 18 are connected; the motor terminals U, V and W of the first frequency converter 13 are connected to the power terminals U1, V1 and W1 of the first variable frequency speed regulating motor 11 through the motor cable. terminal connected; the motor terminals U′, V′, W′ of the second frequency converter 14 are connected to the power supply terminals W2, V2, U2 of the second variable frequency speed regulating motor 12 through motor cables; the speed regulation control circuit 15 is connected to Between the first frequency converter 13 and the second frequency converter 14; the power input end of the power circuit 16 is connected with the power output end of the three-phase power input switch 18; the power output end of the power circuit 16 is connected with the power supply of the frequency converter control circuit 17 The control signal output terminals of the frequency converter control circuit 17 are connected to the corresponding ports of the first frequency converter 13 and the second frequency converter 14 .

Still see Fig. 4 and Fig. 5, speed regulation control circuit 15 has first potentiometer SR1, second potentiometer SR2 and synchronous speed regulation potentiometer SR3; One end of synchronous speed regulation potentiometer SR3 and the control terminal of first frequency converter 13 The output end of the first DC power supply in the 10V DC power supply output end is connected, the other end of the synchronous speed regulating potentiometer SR3 is electrically connected with the zero potential end GND end of the control terminal of the first frequency converter 13, and the synchronous speed regulating potentiometer SR3 The adjustable end of the first potentiometer SR1 is connected to one end of the second potentiometer SR2 at the same time; the other end of the first potentiometer SR1 is electrically connected to the zero potential end GND end of the control terminals of the first frequency converter 13, The adjustable end of the first potentiometer SR1 is connected to the analog signal input terminal AI1 end for receiving the speed control signal in the control terminal of the first frequency converter 13; the other end of the second potentiometer SR2 is connected to the second frequency converter 14 The zero-potential terminal GND' in the control terminal of the control terminal is electrically connected, and the adjustable terminal of the second potentiometer SR2 is connected to the analog signal input terminal AI1' for receiving the speed control signal in the control terminal of the second frequency converter 14 . One end of the first potentiometer SR1 connected to the zero potential end GND end of the control terminals of the first frequency converter 13 and one end of the second potentiometer SR2 connected to the zero potential end GND' end of the control terminals of the second frequency converter 14 connected.

Still see Fig. 4 and Fig. 5, the frequency converter control circuit 17 has the braking control circuit and reset control circuit that are arranged between its power terminal and the power ground of power circuit 16; The frequency converter control circuit 17 also has rotation control circuit, protection Control circuit and alarm device HL2. The rotation control circuit has a normally closed button switch SB2, a rotation extrusion control circuit and a jog return control circuit.

Still referring to Fig. 4 and Fig. 5, the rotation extrusion control circuit is provided with the normally open button switch SB3, the normally closed third contact switch KA2-3 of the second relay KA2 and the coil of the first relay KA1 in series. The jogging return control circuit is provided with the normally open button switch SB4, the normally closed fourth contact switch KA1-4 of the first relay KA1 and the coil of the second relay KA2 connected in series in sequence.

Still see Fig. 4 and Fig. 5, the other end of normally open button switch SB3 is connected with the other end of normally open button switch SB4; The other end of the coil of the first relay KA1 is connected with the other end of the coil of the second relay KA2, and the The common node of the coil of the first relay KA1 and the coil of the second relay KA2 communicates with the power supply ground of the power supply circuit 16; One end is connected with the common contact of the normally open push button switch SB3 and the normally open push button switch SB4. The two ends of the normally open button switch SB3 are connected in parallel with the normally open third contact switch KA1-3 of the first relay KA1 for self-maintaining the on state.

Still see Figure 4 and Figure 5, the first relay KA1 also has a normally open first contact switch KA1-1 and a normally open second contact switch KA1-2; the first contact switch KA1- of the first relay KA1 One end of 1 is connected to the second DC power supply output terminal COM in the control terminal of the first frequency converter 13, and the other end is connected to the digital signal input for receiving the forward rotation control signal in the control terminal of the first frequency converter 13 Terminal FWD is connected; one end of the second contact switch KA1-2 of the first relay KA1 is connected with the second DC power output terminal COM' in the control terminal of the second frequency converter 14, and the other end is connected with the second frequency converter 14 The digital signal input terminal FWD' for receiving the forward rotation control signal among the control terminals is connected. Such a connection mode, when the utility model is used for the work of the rubber mixing machine, press the normally open button switch SB3 (which can be called a synchronous start button) of the rotary extrusion control circuit, so that the coil of the first relay KA1 is energized and the The corresponding first contact switch KA1-1 and the second contact switch KA1-2 are closed. The first contact switch KA1-1 of the first relay KA1 is closed so that the first frequency converter 13 outputs the corresponding power from its motor terminal, so that the first frequency conversion speed regulating motor 11 rotates forward, and the second contact switch KA1- 2. Closing makes the second frequency converter 13 output corresponding power from its motor terminal, and makes the second frequency conversion and speed regulation motor 12 reversely rotate. The two motors drive their respective driving devices in turn, so that the front roller 5 rotates forward and the rear roller 6 rotates in the reverse direction. This rotation method can be called the rotation extrusion method; because the contact switch KA1-3 is closed The first relay KA1 can be energized and self-protected, and the rubber mixing machine is in the normal working state of extruding and mixing rubber.

Still see Figure 4 and Figure 5, the second relay KA2 also has a normally open first contact switch KA2-1 and a normally open second contact switch KA2-2; the first contact switch KA2- of the second relay KA2 One end of 1 is connected to the second DC power output terminal COM in the control terminal of the first frequency converter 13, and the other end is connected to the digital signal input for receiving the reverse rotation control signal in the control terminal of the first frequency converter 13 Terminal REV is connected; one end of the second contact switch KA2-2 of the second relay KA2 is connected with the second DC power output terminal COM' in the control terminal of the second frequency converter 14, and the other end is connected with the second frequency converter 14 The digital signal input end REV' for receiving the reverse rotation control signal among the control terminals of the control terminal is connected. Such connection mode, when the utility model is used for the work of the rubber mixing machine, press the normally open button switch SB4 (which can be called the jog return button) of the jog return control circuit, so that the coil of the second relay KA2 is energized and the The corresponding first contact switch KA2-1 and the second contact switch KA2-2 are closed. When the first contact switch KA2-1 of the second relay KA2 is closed, the first frequency converter 13 outputs the corresponding power from its motor terminal, so that the first variable frequency speed regulating motor 11 rotates in reverse, and the second contact switch KA2- When it is closed, the second frequency converter 14 outputs corresponding power from its motor terminal, so that the second frequency conversion speed regulation motor 12 rotates in the forward direction. The two motors drive their respective driving devices in turn, so that the front roller 5 rotates in the reverse direction, and the rear roller 6 rotates in the forward direction. The circuit structure of the second relay KA2 is energized and self-protected, so the retraction and rotation of the front and rear rollers of the rubber mixing machine is carried out under manual control. This control method is called the inching return method.

Still see Fig. 4 and Fig. 5, the braking control circuit of the frequency converter control circuit 17 is provided with 4 normally open pushbutton switches SB6～SB9 and the coil of the third relay KA3 connected in parallel; these parallel normally open pushbutton switches SB6～SB9 At the same time, it is connected in series with the coil of the third relay KA3; the third relay KA3 has a normally open first contact switch KA3-1, a normally open second contact switch KA3-2 and a normally closed third contact switch KA3-3 ; When the circuit device of the utility model is used in the corresponding open rubber mixing machine, the normally open button switches SB6-SB9 are also called brake buttons, and these brake buttons are arranged on the corresponding parts of the rubber mixing machine, that is, they are arranged on the operator At hand, so that the motor can be stopped in time when the rubber mixing machine is working, which improves the operation safety of the rubber mixing machine workers.

Still see Fig. 4 and Fig. 5, one end of the first contact switch KA3-1 of the third relay KA3 is connected with the second DC power output terminal COM in the control terminal of the first inverter 13, and the other end is connected with the first inverter One end of the second contact switch KA3-2 of the third relay KA3 and one end of the second contact switch KA3-2 of the second frequency converter 14 The output terminal COM' of the second DC power supply is connected, and the other terminal is connected to the digital signal input terminal D14' of the control terminal of the second frequency converter 14 for receiving the braking control signal. Such a connection mode, when the utility model is used in the rubber mixing machine, pressing any one of the normally open button switches SB6-SB9 of the jog return control circuit will make the coil of the third relay KA3 energized, thereby simultaneously The first contact switch KA3-1 and the second contact switch KA3-2 of the third relay KA3 are closed. When the first contact switch KA3-1 is closed, the first inverter 13 stops outputting power from its motor terminals U, V, and W to the first variable frequency speed regulating motor 11, so that the first variable frequency speed regulating motor 11 stops rotating. ; The second contact switch KA3-2 is closed so that the second frequency converter 14 stops outputting power from its motor terminals U', V', W' to the second frequency conversion speed regulating motor 12, so that the second frequency conversion speed regulating motor 12 stops turning.

Still see Figure 4 and Figure 5, the third contact switch KA3-3 of the third relay KA3 is connected in series between the common contact of the coil of the first relay KA1 and the coil of the second relay KA2 and the power ground of the power circuit 16, also That is, the common contact of the coil of the first relay KA1 and the coil of the second relay KA2 is not directly connected to the power ground of the power supply circuit 16, but the common contact is connected to a contact of the third contact switch KA3-3 of the third relay KA3. The points are connected, and the other contact of the third contact switch KA3-3 of the third relay KA3 is connected with the power ground of the power circuit 16. Such a connection mode, when the utility model is used in the rubber mixing machine, if the coil of the third relay KA3 is energized, the third contact switch KA3-3 changes from the normally closed state to the disconnected state, so that the entire rotation The control circuit loses power, so that the first contact switch KA1-1, the second contact switch KA1-2 of the first relay KA1, the first contact switch KA2-1, and the second contact switch KA2 of the second relay KA2 -2 are both in the disconnected state, so that the first inverter 13 and the second inverter 14 are in the state of not outputting motor power; Both the extrusion control circuit and the inching return control circuit are in the power-off state, so they cannot send control signals to the first frequency converter 13 and the second frequency converter 14, thereby ensuring safe and reliable operation of the rubber mixing machine.

Still see Fig. 4 and Fig. 5, the protection control circuit of the frequency converter control circuit 17 has the output relay port in the control terminal of the first frequency converter 13 and the corresponding built-in switch, and the output in the control terminal of the second frequency converter 14 Relay ports and corresponding built-in switches, the common end 1A end of the output relay port of the first frequency converter 13 is connected with the normally closed end 2B end of the output relay port of the second frequency converter 14, and the output relay port of the first frequency converter 13 The normally open end 1C end of the second inverter 14 is connected to the normally open end 2C end of the output relay port; the protection control circuit is connected in series between the third contact switch KA3-3 of the third relay KA3 and the power ground of the power supply circuit 16 In other words, the end of the third contact switch KA3-3 of the third relay KA3 connected to the power ground of the power circuit 16 is not directly connected to the power ground, but connected to the protection control of the first frequency converter 13 The normally closed terminal 1B of the output relay port of the circuit is connected, and then the common terminal 2A of the output relay port of the second frequency converter 14 belonging to the protection control circuit is connected to the power ground of the power circuit 16 . Such a connection mode, when the utility model is used for the work of the rubber mixing machine, if the central processing unit in the frequency converter 13, 14 detects that the output current of the power supply for driving the motor exceeds the set maximum current intensity , or when the power of the output power exceeds the set maximum value, the state of the built-in switch can be controlled by the corresponding frequency converter to change, so that the normally closed terminal 1B connected to the relay port of the first frequency converter 13 terminal and the common terminal 1A terminal, or disconnect the built-in switch between the normally closed terminal 2B terminal and the common terminal 2A terminal connected to the relay port of the second frequency converter 14, so that The entire rotation control circuit is powered off, so that the first frequency converter 13 and the second frequency converter 14 are in a state of not outputting motor power.

Still see Fig. 4 and Fig. 5, warning device HL2 is a warning lamp, and one end of warning device HL2 is connected with the power end of frequency converter control circuit 17, and the other end is connected with the output relay port of the protection control circuit of the first frequency converter 13. The normally open terminal 1C is connected, and the normally open terminal 1C of the output relay port of the first frequency converter 13 of the protection control circuit is connected with the normally open terminal 2C of the output relay port of the second frequency converter 14 . Such connection mode, when the utility model is used for the work of the rubber mixing machine, the built-in switch between the normally closed end 1B end and the common end 1A end in the relay port connected to the first frequency converter 13 is disconnected. Under normal circumstances, the built-in switch between the common terminal 1A terminal and the normally open terminal 1C terminal in the relay port is turned on, so that the current flows through the alarm device HL2 and flows into the normally open terminal 1C terminal in the relay port of the first frequency converter 13. The first frequency converter 13 flows out from the common end 1A end in the relay port of the first frequency converter 13, then flows into the second frequency converter 14 from the normally open end 2C end in the relay port of the second frequency converter 14, and then flows from the second frequency converter 14 The common end 2A of the relay ports of the second frequency converter 14 flows out, and finally flows into the power ground of the power circuit 16, thereby turning on the warning lamp HL2.

When the built-in switch between the normally closed end 2B end and the common end 2A end in the relay port connected to the second frequency converter 14 is disconnected, the common end 2A end and the normally open end 2C end in the relay port The built-in switch between them is turned on, so that the current flows through the alarm device HL2, and then flows into the second frequency converter 14 from the normally open terminal 2C (the 1C terminal and the 2C terminal have the same point) in the relay port of the second frequency converter 14. Then it flows out from the common terminal 2A of the relay ports of the second frequency converter 14, and finally flows into the power ground of the power circuit 16, thereby turning on the warning light HL2.

Still see Fig. 4 and Fig. 5, the frequency converter control circuit 17 has the reset control loop that is arranged on the live wire of the power output end of the power supply circuit 16 and the ground wire; The reset control loop of the frequency converter control circuit 17 is provided with the normally open The coil of the button switch SB5 and the fourth relay KA4; the fourth relay KA4 also has a normally open first contact switch KA4-1 and a normally open second contact switch KA4-2; the first contact of the fourth relay KA4 One end of the switch KA4-1 is connected to the second DC power output terminal COM in the control terminal of the first frequency converter 13, and the other end is connected to the digital signal used to receive the reset control signal in the control terminal of the first frequency converter 13 The input end RST end is connected; one end of the second contact switch KA4-2 of the fourth relay KA4 is connected with the second DC power output end COM' in the control terminal of the second frequency converter 14, and the other end is connected with the second frequency converter Among the control terminals 14, the digital signal input terminal RST' for receiving the reset control signal is connected. Such a connection mode, when the utility model is used for the rubber mixing machine, press the normally open button switch SB5 (also called the reset button) of the reset control circuit, then the coil of the fourth relay KA4 is energized, thereby making the The first contact switch KA4-1 and the second contact switch KA4-2 of the fourth relay KA4 are closed. When the first contact switch KA4-1 is closed, the first inverter 13 is reset; when the second contact switch KA4-2 is closed, the second inverter 14 is reset.

The working process of the rubber mixing machine of the present embodiment is as follows:

When operating the open type rubber mixing machine to work, close the automatic switch QS (main power switch) on the electrical control cabinet, then start the blower fan D1, D2 that is installed in the frequency conversion governor 13,14 next door. Press the button (synchronous start button) of the normally open button switch SB3 in the rotation extrusion control circuit in the frequency converter control circuit 17 again, the coil of the first relay KA1 is energized, thereby the third contact switch of the first relay KA1 KA1-3 pulls in to keep the control circuit in a conducting state, and at the same time makes the first contact switch KA1-1 connected to the first frequency converter 13 pull in to control the output of the motor terminal of the first frequency converter 13 through frequency conversion and regulation. Voltage power supply to the first variable frequency speed regulating motor 11 to drive it to rotate in the forward direction; at the same time, the second contact switch KA1-2 connected to the second frequency converter 14 is pulled in to control the output of the motor terminal of the second frequency converter 14 The power supply through frequency conversion and voltage regulation is sent to the second frequency conversion and speed regulation motor 12 to drive it to rotate in reverse.

The rotation speed is transmitted to the input end of the respective gear reducer 31, 32 through the respective couplings 21, 22, and after being decelerated by the respective gear reducer 31, 32, the required roller speed is output from the output end, and passed through the respective The universal joints 41, 42 are transmitted to the front roller 5 and the rear roller 6 respectively. Make the front roller 5 and the rear roller 6 rotate relative to each other at different linear speeds, and the rubber material is pulled into the gap between the two rollers under the action of friction, and is strongly squeezed and sheared. Oxidative chain scission occurs at the same time as chain scission, thereby increasing plasticity and realizing rubber mixing. When it is necessary to change the linear speed of the front roller 5 and the rear roller 6 due to various reasons, or to change the ratio between the linear speeds of the front roller 5 and the rear roller 6, the two frequency conversion speed regulation motors 11 can be reset , 12 of the respective rotating speed, so that the linear velocity of the front roller 5 and the rear roller 6 changes.

The above-mentioned setting of the respective rotating speeds of the variable frequency speed regulating motors 11 and 12 is realized by adjusting the resistance value of the potentiometer of the speed regulating control circuit 15 in the circuit device. The adjustment of the rotational speed of the first variable frequency speed regulating motor 11 can be realized by adjusting the resistance value of the first potentiometer SR1, and the adjustment of the rotational speed of the second variable frequency speed regulating motor 12 can be realized by adjusting the resistance value of the second potentiometer SR2 , so that the front and rear rollers meet the requirements of the process speed difference; then by adjusting the resistance value of the synchronous speed regulating potentiometer SR3, the speed of the two frequency conversion speed regulating motors 11 and 12 is increased or decreased at the same time to make it reach the speed required by the process .

During normal parking, adjust the resistance value of the synchronous speed regulating potentiometer SR3 to zero, and then press the button of the synchronous stop button switch SB2, so that the first variable frequency speed regulating motor 11 and the variable frequency speed regulating motor 12 are powered off at the same time And stop turning. In case of emergency stop, just press any one of the emergency stop button switches SB6~SB9 on the side of the rack to realize braking and stop of the inverter. When restarting the machine, the emergency stop button should be reset before driving .

The speed adjustment when the machine is working normally can be realized by rotating the respective speed adjustment knobs of the front and rear rollers on the panel of the control cabinet, and the speed ratio can be known from the value displayed on the panel.

See Fig. 5, power circuit 16 also has fuse QF4 and fuse QF5, should close respective contact switch before work to make power circuit 16 work normally. If the transformer T of the power supply circuit 16 is overheated or the circuit is overheated, the fuses QF4 and QF5 are disconnected to ensure the safety of the circuit and equipment.

Still referring to FIG. 5 , the frequency converter control circuit 17 also has a normally closed button switch SB1 arranged at the power supply end of its main part. Pressing the button of the button switch SB1 can cut off the power supply of the main part of the frequency converter control circuit 17, and make the rubber mixing machine stop working.

Still see Fig. 5, the first inverter 13 of this circuit device is connected with the first braking resistor R1 between its DC bus positive terminal and the braking resistor terminal, and the second inverter 14 is connected between its DC bus positive terminal and the braking resistor terminal. A second braking resistor R2 is connected between the resistor terminals. The first function of connecting braking resistors R1 and R2 is to absorb energy during braking. The second function is as a buffer resistor. This is because the rotational speeds of the two motors 11 and 12 are different during work, resulting in different linear speeds of the front and rear rollers 5 and 6, and the motors that drive the rollers with slow linear speeds It will be driven by another motor, and the driven motor will act as a generator. When the braking resistor R1 or R2 is connected, the energy generated by the driven motor can be consumed, so the braking resistor at this time plays a buffer role and can be called a buffer resistor.

Still see Fig. 2, this circuit device can also be provided with fast-fusing circuit, and fast-fusing circuit is connected between the positive terminal (+) terminal of DC bus of two frequency converters 13,14, and the DC bus of two frequency converters 13,14 The negative terminal (-) terminal is directly connected. When the circuit device is equipped with a fast-melting circuit, once the bus current overshoots, it will automatically fuse to play a protective role. At the same time, the two ports of the fuse are connected to the inverter control circuit 17, which is located at the A terminal of the brake control circuit. Between terminal B and the fuse FU of the fast-melting circuit, the brake circuit is connected at the same time, so that the inverter brakes and stops, and the motor is protected. In addition, at this time, the DC bus positive terminals (+) of the two frequency converters 13 and 14 are directly connected by the fuse FU. Therefore, when the linear speeds of the rollers driven by the two motors 11 and 12 are different At this time, the energy generated by the driven motor is transmitted to the DC bus positive terminal (+) of another inverter through the corresponding inverter’s DC bus positive terminal (+), so that the other inverter is used for useful Work consumption; at this time, the buffering effect of the braking resistors R1 and R2 no longer exists, and can only absorb energy during braking.

(Example 2)

The rest are the same as in Embodiment 1, except that the diameters of the front roller 5 and the rear roller 6 are both 450 mm.

(Example 3)

The rest are the same as in Embodiment 1, except that the front roller 5 has a diameter of 450mm and a length of 800mm; the rear roller 6 has a diameter of 500mm and a length of 800mm.

(Example 4)

The rest are the same as in Embodiment 1, except that the front roller 5 has a diameter of 700mm and a length of 800mm; the rear roller 6 has a diameter of 700mm and a length of 800mm.

Claims (10)

1. an opening rubber mixing machine has frame (8), motor, circuit arrangement, gear reduction unit, a pair of refining rubber roll tube and the one group of roller bearing seat (7) that is fixed with bearing; Frame (8) has left socle (81), right support (82) and base (83); Left socle (81) and right support (82) are fixed on base (83) and go up and formation support (8); Motor and gear reduction unit are fixed on the base (83), on left socle (81) and the right support (82) two roller bearing seats (7) are installed respectively; Refining rubber roll tube is divided into the blanket roller (5) that is fixed with bearing and the back roller (6) that is fixed with bearing, blanket roller (5) and back roller (6) respectively the bearing by separately be rotatably connected on the corresponding roller bearing seat (7) that is fixed on the left socle (1) go up and be fixed on the right support (2) corresponding roller bearing seat (7) upward and blanket roller (5) and after roller (6) opposing parallel setting; It is characterized in that: motor has two, and is frequency control motor, and they are first frequency control motor (11) and second frequency control motor (12); Gear reduction unit also has two, and they are first gear reduction unit (31) and second gear reduction unit (32); First frequency control motor (11) connects first gear reduction unit (31) by first shaft coupling (21), and first gear reduction unit (31) is connected to blanket roller (5) by first Hooks coupling universal coupling (41) again; Second frequency control motor (12) connects second gear reduction unit (32) by second shaft coupling (22), and second gear reduction unit (32) is connected to back roller (6) by second Hooks coupling universal coupling (42) again; Circuit arrangement has first frequency converter (13), second frequency converter (14), speed-regulating control circuit (15), power circuit (16), transducer control circuit (17) and three phase mains input switch (18); The power supply terminal of the power supply terminal of first frequency converter (13) and second frequency converter (14) links to each other by the power output end of corresponding main power source electric wire with three phase mains input switch (18) respectively; The motor terminal of first frequency converter (13) links to each other with the power end of first frequency control motor (11); The motor terminal of second frequency converter (14) links to each other with the power end of second frequency control motor (12); Speed-regulating control circuit (15) is connected across between first frequency converter (13) and second frequency converter (14); The power input of power circuit (16) is connected with the power output end of three phase mains input switch (18); The power output end of power circuit (16) links to each other with the power end of transducer control circuit (17); Each control signal output of transducer control circuit (17) is connected with first frequency converter (13), second frequency converter (14) corresponding port.

2. opening rubber mixing machine according to claim 1 is characterized in that: speed-regulating control circuit (15) has the first potentiometer SR1, the second potentiometer SR2 and synchronous variable-speed potentiometer SR3; First dc power output end in the control terminal of a frequency converter in the end of synchronous variable-speed potentiometer SR3 and first frequency converter (13) and second frequency converter (14) links to each other, the other end of synchronous variable-speed potentiometer SR3 is electrically connected with zero potential end in the control terminal of this frequency converter, and the adjustable end of synchronous variable-speed potentiometer SR3 links to each other with the end of the first potentiometer SR1 and the end of the second potentiometer SR2 simultaneously; Zero potential end in the control terminal of the other end of the first potentiometer SR1 and first frequency converter (13) is electrically connected, and the analog signals input that being used in the adjustable end of the first potentiometer SR1 and the control terminal of first frequency converter (13) receives speed controling signal links to each other; Zero potential end in the control terminal of the other end of the second potentiometer SR2 and second frequency converter (14) is electrically connected, and the analog signals input that being used in the adjustable end of the second potentiometer SR2 and the control terminal of second frequency converter (14) receives speed controling signal links to each other.

3. opening rubber mixing machine according to claim 2 is characterized in that: an end of the zero potential end in an end of the zero potential end in the control terminal that is connected in first frequency converter (13) of the first potentiometer SR1 and the control terminal that is connected in second frequency converter (14) of the second potentiometer SR2 links to each other.

4. opening rubber mixing machine according to claim 1 is characterized in that: transducer control circuit (17) has rotation control circuit; Rotation control circuit has normally closed push button switch SB2, rotation extruding control circuit and crawl and returns control circuit; The end of normally closed push button switch SB2 links to each other with the power end of transducer control circuit (17); Rotate the extruding control circuit and be provided with the 3rd normally closed contact switch KA2-3 of the normally open push button switch SB3, the second relay K A2 that connect successively and the coil of the first relay K A1; Crawl is return control circuit and is provided with the 4th normally closed contact switch KA1-4 of the normally open push button switch SB4, the first relay K A1 that connect successively and the coil of the second relay K A2; The other end of normally open push button switch SB3 links to each other with the other end of normally open push button switch SB4; The other end of the coil of the first relay K A1 links to each other with the other end of the coil of the second relay K A2, and their common junction is communicated with the power supply ground of power circuit (16); The two ends of normally open push button switch SB3 are parallel with the 3rd contact switch KA1-3 that often opens of the first relay K A1 that is used for the self-insurance on-state; The other end of normally closed push button switch SB2 links to each other with the common junction of normally open push button switch SB4 with normally open push button switch SB3;

The first relay K A1 also has the first contact switch KA1-1 that often opens and the second contact switch KA1-2 of Chang Kai; The end of the first contact switch KA1-1 of the first relay K A1 links to each other with second dc power output end in the control terminal of first frequency converter (13), and the digital quantity signal input that being used in the control terminal of the other end and first frequency converter (13) receives the forward rotation control signal links to each other; The end of the second contact switch KA1-2 of the first relay K A1 links to each other with second dc power output end in the control terminal of second frequency converter (14), and the digital quantity signal input that being used in the control terminal of the other end and second frequency converter (14) receives the forward rotation control signal links to each other;

The second relay K A2 also has the first contact switch KA2-1 that often opens and the second contact switch KA2-2 of Chang Kai; The end of the first contact switch KA2-1 of the second relay K A2 links to each other with second dc power output end in the control terminal of first frequency converter (13), and the digital quantity signal input that being used in the control terminal of the other end and first frequency converter (13) receives the backward rotation control signal links to each other; The end of the second contact switch KA2-2 of the second relay K A2 links to each other with second dc power output end in the control terminal of second frequency converter (14), and the digital quantity signal input that being used in the control terminal of the other end and second frequency converter (14) receives the backward rotation control signal links to each other; And the terminals of the motor terminal of first frequency converter (13) and first frequency control motor (11) are connected by the mode of forward rotation, and the motor side of second frequency converter (14) is connected by counter-rotational mode with the terminals of second frequency control motor (12).

5. opening rubber mixing machine according to claim 4 is characterized in that: transducer control circuit (17) also has the brake servo circuit between the power supply ground that is arranged on its power end and power circuit (16); Brake servo circuit is provided with the coil of 2～5 normally open push button switches parallel with one another and the 3rd relay K A3; These normally open push button switches in parallel are connected with the coil of the 3rd relay K A3 simultaneously; The 3rd relay K A3 has the first contact switch KA3-1 that often opens, the second contact switch KA3-2 that often opens and the 3rd normally closed contact switch KA3-3;

The end of the first contact switch KA3-1 of the 3rd relay K A3 links to each other with second dc power output end in the control terminal of first frequency converter (13), and the digital quantity signal input that being used in the control terminal of the other end and first frequency converter (13) receives brake control signal links to each other; The end of the second contact switch KA3-2 of the 3rd relay K A3 links to each other with second dc power output end in the control terminal of second frequency converter (14), and the digital quantity signal input that being used in the control terminal of the other end and second frequency converter (14) receives brake control signal links to each other;

The 3rd contact switch KA3-3 of the 3rd relay K A3 is connected between the power supply ground of the common junction of coil of the coil of the first relay K A1 and the second relay K A2 and power circuit (16).

6. opening rubber mixing machine according to claim 5 is characterized in that: transducer control circuit (17) also has the protection control circuit; The protection control circuit have in the control terminal of first frequency converter (13) the output relay port and corresponding in establish in the control terminal of switch and second frequency converter (14) the output relay port and corresponding in establish switch, the common ends 1A end of the output relay port of first frequency converter (13) is held with the normal-closed end 2B of the output relay port of second frequency converter (14) and is linked to each other; Protection control circuit polyphone is arranged between the power supply ground of the end of the 3rd contact switch KA3-3 of the 3rd relay K A3 and power circuit (16); also promptly this end of the 3rd contact switch KA3-3 of the 3rd relay K A3 links to each other with the normal-closed end 1B end of the output relay port of first frequency converter (13), and the common ends 2A end of the output relay port of second frequency converter (14) links to each other with the power supply ground of power circuit (16).

7. opening rubber mixing machine according to claim 6 is characterized in that: transducer control circuit (17) also has alarm appliance HL2; The Chang Kaiduan 1C end of the output relay port of first frequency converter (13) of protection control circuit links to each other with the Chang Kaiduan 2C end of the output relay port of second frequency converter (14); The end of alarm appliance HL2 links to each other with the power end of transducer control circuit (17), and the other end links to each other with the protection control circuit, also is that this end of alarm appliance HL2 links to each other with the Chang Kaiduan 1C end of the output relay port of first frequency converter (13).

8. opening rubber mixing machine according to claim 1 is characterized in that: transducer control circuit (17) has the control loop that resets between the power supply ground that is arranged on its power end and power circuit (16); The control loop that resets of transducer control circuit (17) is provided with the normally open push button switch SB5 of series connection successively and the coil of the 4th relay K A4; The 4th relay K A4 also has the first contact switch KA4-1 that often opens and the second contact switch KA4-2 of Chang Kai; The end of the first contact switch KA4-1 of the 4th relay K A4 links to each other with second dc power output end in the control terminal of first frequency converter (13), and the digital quantity signal input that being used in the control terminal of the other end and first frequency converter (13) receives reseting controling signal links to each other; The end of the second contact switch KA4-2 of the 4th relay K A4 links to each other with second dc power output end in the control terminal of second frequency converter (14), and the digital quantity signal input that being used in the control terminal of the other end and second frequency converter (14) receives reseting controling signal links to each other.

9. according to the described opening rubber mixing machine of one of claim 1 to 8, it is characterized in that: circuit arrangement also has fast molten circuit, the first braking resistor R1 and the second braking resistor R2; The first braking resistor R1 is connected between the dc bus plus end and braking resistor terminal of first frequency converter 13; The second braking resistor R2 is connected between the dc bus plus end and braking resistor terminal of second frequency converter 14; Fast molten circuit is connected between dc bus plus end (+) end of first frequency converter 13 and second frequency converter 14, and first frequency converter, 13 dc bus negative terminals (-) end links to each other with dc bus negative terminal (-) end of second frequency converter 14.

10. according to the described opening rubber mixing machine of one of claim 1 to 8, it is characterized in that: the diameter of blanket roller (5) is 400～700mm, and length is 600～1000mm; The diameter of back roller (6) is 400～700mm, and length is 600～1000mm.

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