CN201173836Y - A transmission and control device for wire rope tension detection - Google Patents

Abstract

A transmission and control device for steel wire rope tension detection, including a power drive unit, a hydraulic jacking unit and an electric control unit. The power drive unit drives the gears and shafts to control the rotation of the rope-releasing drum and the rope-receiving drum through the frequency conversion motor and gear box to generate the required pulling force; the hydraulic jacking unit sets the pulling force of the electrical control unit through PLC, and the cylinder pressure passes through the pressure The transmitter is sent to the PLC, and the oil cylinder is controlled to advance or retreat through the PLC to keep the pressure constant; the electrical control unit is equipped with a tension sensor at the place where the rope is released and received, and the automatic tension controller detects the tension according to the tension sensor, and the PLC is set according to the pulling force. Constant tension, respectively automatically adjust the braking torque of the rope and the magnetic current of the torque, so as to control the tension of the wire rope release/retraction, so that the release/retraction can be kept synchronous, and realize the stepless speed change of the wire rope; the device is suitable for measuring The field of tension detection transmission and control devices for ropes, cables, wires, belts or similar flexible parts.

Description

A transmission and control device for wire rope tension detection

technical field

The utility model relates to the field of detection and control of measuring force, stress, torque, work, mechanical power, mechanical efficiency or fluid pressure, in particular to a detection transmission and control system for measuring the tension of ropes, cables, wires, belts or similar flexible components. control device.

Background technique

At present, the detection, maintenance and maintenance of large tension wire rope devices for field operations in electric power systems have all used large tension wire rope automatic cleaning, detection, and oiling devices. The wire rope tension detection transmission and control part is the core component of the automatic cleaning, detection and oiling device for large tension steel wire ropes. It can detect the tensile strength of high tension steel wire ropes to ensure the safety of steel wire ropes.

The transmission and control device for the wire rope tension detection of the large-tension wire rope automatic cleaning, detection, and oiling device, because the wire rope is stretched and lengthened due to the tension during the detection and release process of the wire rope, in order to keep the tension constant, it is necessary to make the rope take-up The speed is greater than the speed of unwinding the rope.

At present, the wire rope tension detection driving device used for automatic cleaning, detection and oiling of large tension wire ropes in the market adopts a differential drive device, and its main types are as follows:

1. Connect the electromechanical sensor in series to one end of the wire rope to directly convert the tension of the wire rope into an electrical signal;

2. The pressure wheel is connected to the force sensor, and then connected to the propulsion mechanism.

The common disadvantages of the above two methods are: the steel wire rope needs to be disconnected from the electromechanical sensor during detection, and only one end or both ends of the steel wire rope can be measured, and the rope speed is zero; one electromechanical sensor can only measure one Steel wire rope is fixed, inconvenient to use, and requires two sets of hydraulic or electric transmission mechanisms; it is heavy in weight, large in size, and inconvenient to carry with a cantilever mechanism; it is difficult to install, debug, and maintain. The control is complicated, the failure rate is high, and the application area is narrow; the structure Complicated and expensive to manufacture.

The publication number is CN1105755, and the Chinese patent dated July 26, 1995 discloses a hoist wire rope tension on-line detection device, which can directly measure the tension of the wire rope. Its working principle is that the data is collected by the single-chip microcomputer, the wire rope is used as the transmission medium, and the frequency shift keying (FSK) and the phase-locked loop frequency modulation circuit (PLL-FM) are used for two-stage modulation, and the emission device is used for directional emission through the emission device raised and lowered along the shaft. . The receiving device at the wellhead adopts automatic gain control, narrow-band filter and FM-FSK two-stage demodulation, processes the received signal with a single-chip microcomputer, and realizes online monitoring of wire rope tension through printing, digital display and alarm.

Publication No. CN2783294, the Chinese patent published on May 24, 2006 discloses a non-breakpoint steel wire rope tension detection device, which is suitable for indirect measurement of force-bearing steel wire ropes without breakpoints such as mine hoisting wire ropes and tank road steel wire ropes. Tension force, the device is composed of upper and lower guide wheels, intermediate wheels, U-shaped clips, force sensors, adjustment nuts, force screw rods, force measuring brackets, lock nuts and displacement blocks, without changing the force of the wire rope The structure can accurately and directly measure the real-time tension of the steel wire rope under stress.

The above-mentioned two patents relate to the steel wire rope detection used in mining, which is different from the working environment of the utility model.

The publication number is CN2689206, and the publication date is a Chinese patent on March 30, 2005, which discloses a steel wire rope tension detection electromechanical converter. The power-electricity converter has a bracket, two ends of the bracket are connected with rope pulleys, and the middle part of the bracket is connected with a power-electricity detection wheel. The electromechanical detection wheel has a slider, one side of the slider has a guide key, one end of the slider is connected with a pressure wheel, the other end is connected with a lead screw, and a electromechanical sensor is connected between the slider and the leading screw; the electromechanical conversion The device is a bow-shaped structure as a whole, which ensures the rigidity, reduces its own weight, and detects the tension of the steel wire rope without destroying the working state of the steel wire rope in use. However, this patent only improves the electromechanical converter to detect the tension of the wire rope, and its detection performance is unstable, and operation and control are inconvenient.

Utility model content

In order to solve the above problems, the utility model provides a transmission and control device for wire rope tension detection with simple structure, large transmission torque, convenient control and low manufacturing cost. The transmission and control device for steel wire rope tension detection has stable detection performance in actual use, is simple and convenient to operate and uses, and has low manufacturing cost.

The technical scheme of the utility model is:

A transmission and control device for wire rope tension detection, comprising a power drive unit (A), a hydraulic jacking unit (B) and an electrical control unit (C) connected to the power drive unit; it is characterized in that the power drive unit (A) , the hydraulic jacking unit (B) and the electrical control unit (C) are driven to rotate by a mechanical transmission chain.

The power drive unit (A) consists of a variable frequency motor, a gear box, a main gear, a No. 1 driven gear, a No. 2 driven gear, a No. 1 rope receiving drum, a No. 2 rope receiving drum, a No. 1 rope releasing drum and It is composed of the No. 2 rope-releasing drum; when starting, the frequency conversion motor drives the gear box, and then drives the No. 1 driven gear and the No. 2 driven gear through the main gear, and the two gear shafts drive the No. Rope-laying drum and No. 1 rope-receiving drum, No. 2 rope-receiving drum rotate.

The diameter of the rope-receiving drum is larger than that of the rope-releasing drum.

The hydraulic jacking unit (B) is composed of No. 1 pulley, No. 2 pulley, No. 3 pulley, oil cylinder and pressure transmitter; the three pulleys are connected to each other through a mechanical transmission chain belt, and the pressure of the oil cylinder is passed through the pressure transmitter It is sent to a programmable logic controller (referred to as PLC), and the PLC controls the advance or retreat of the oil cylinder to control the increase or decrease of the wire rope tension of the pulley block.

Said oil cylinder keeps the pressure constant by feeding oil into port A or port B of the oil cylinder through the PLC control hydraulic system.

The electrical control unit (C) consists of No. 1 automatic tension controller, automatic adjustment magnetic powder brake, No. 1 sprocket, tested steel wire reel, No. 2 automatic tension controller, magnetic powder clutch, gear box, No. 2 sprocket, Composed of a rope-receiving motor, a rope-receiving reel and a steel wire rope to be tested;

It is preferred that No. 1 automatic tension controller adjusts and controls the braking torque of the released rope of the magnetic powder brake, and then changes the braking torque of the measured steel wire rope in the tested steel wire reel by the No. 1 sprocket wheel to control the tension of the released rope;

It is preferred that No. 2 automatic tension controller adjusts and controls the magnetized current of the magnetic powder clutch torque, and then the rope receiving motor and the gear box control the No. 2 sprocket to adjust the torque of the cable receiving disc through the torque generated by the magnetic powder clutch's magnetized current. Rewinding speed.

The electrical control unit (C) is equipped with a rope tension sensor and a rope tension sensor at the rope unwinding and rope taking places; No. 1 automatic tension controller and No. 2 automatic tension controller are based on the detection tension signal output by the tension sensor Control tension.

The pressure transmitter in the hydraulic jacking unit (B) and the rope tension sensor in the electrical control unit (C), the No. 1 automatic tension controller, the magnetic powder brake, the rope tension sensor, and the No. 2 automatic tension control The instrument and magnetic powder clutch form a closed-loop control through PLC.

The magnetizing current of the magnetic powder brake and the magnetic powder clutch can be controlled automatically.

The magnetizing current of the magnetic powder brake and the magnetic powder clutch can also be manually controlled.

Compared with the prior art, the utility model has the advantages of:

1. The structure is simple, only one transmission chain is needed, and the manufacturing cost is low;

2. The torques of the two ropes cancel each other out, and the transmission torque is large;

3. Small size, easy installation and maintenance;

4. The control is simple, the rope is not easy to be out of balance, and the rope is kept in sync;

5. The wire rope speed regulation is simple, which can realize stepless speed change and improve production efficiency.

Description of drawings

Fig. 1 Schematic diagram of transmission and control device for wire rope tension detection;

Figure 2 is a schematic diagram of the specific structure of the wire rope tension detection drive.

In the figure 1-frequency conversion motor, 2-gear gearbox, 3-main gear, 4-No. 1 driven gear, 5-No. 2 driven gear, 6-No. 1 rope receiving drum, 7-No. 2 rope receiving drum, 8-No. 1 rope release drum, 9-No. 2 rope release drum, 10-No. 1 pulley, 11-No. 2 pulley, 12-No. 3 pulley, 13-Oil cylinder, 14-Pressure transmitter, 15-Rope tension Sensors, 16-No. 1 automatic tension controller, 17-magnetic powder brake, 18-No. 1 sprocket, 19-tested wire reel, 20-rope tension sensor 20, 21-No. 2 automatic tension controller, 22-magnetic powder Clutch, 23-gear box, 24-No. 2 sprocket wheel, 25-rope receiving motor, 26-rope receiving reel, 27-tested steel wire rope, 28-bracket, 29-bearing seat, 30-No. 1 drive shaft, 31- No. two power transmission shaft, 32-upper support plate, 33-lower support plate.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model steel wire rope tension detecting drive and control system will be further described.

As shown in Fig. 1, the transmission and control device for wire rope tension detection of the present invention includes a power drive unit (A), a hydraulic jacking unit (B) and an electrical control unit (C).

The power drive unit (A) consists of frequency conversion motor 1, gear box 2, main gear 3, No. 1 driven gear 4, No. 2 driven gear 5, No. 1 rope receiving drum 6, No. Paying off rope drum 8 and No. two putting out rope drum 9 are made up of. When starting, the frequency conversion motor 1 drives the gear box 2, and then drives the No. 1 driven gear 4 and the No. 2 driven gear 5 through the main gear 3, and the two gear shafts drive the No. The drum 7, the No. 1 rope receiving drum 8, and the No. 2 rope releasing drum 9 rotate, so that the steel wire rope passes through the hydraulic jacking unit (B) to generate the pulling force that needs to be detected.

The hydraulic jacking unit (B) is composed of No. 1 pulley 10, No. 2 pulley 11, No. 3 pulley 12, oil cylinder 13 and pressure transmitter 14. The setting of the pulling force is through the PLC programmable controller of the electrical control unit, and the oil cylinder 13 The pressure is transmitted to PLC (not shown in the figure) by pressure transmitter 14, advances or retreats by PLC control oil cylinder, makes wire rope tension increase or decrease by No. 1 pulley 10, No. 2 pulley 11 and No. 3 pulleys 12. In order to keep the tension at the set value, the pressure feedback signal through the pressure transmitter is sent to the PLC, and the hydraulic system is controlled by the PLC to feed oil to the A or B port of the cylinder to keep the pressure constant.

The electrical control unit (C) consists of a rope tension sensor 15, a No. 1 automatic tension controller 16, an automatic adjustment magnetic powder brake 17, a No. 1 sprocket 18, a tested wire reel 19, a rope tension sensor 20, and a No. 2 automatic tension controller. Instrument 21, magnetic powder clutch 22, gear box 23, No. 2 sprocket wheel 24, rope motor 25, rope reel 26 and steel wire rope 27 to be tested are formed. In order to stabilize the position of the piston rod of the oil cylinder, a rope-releasing tension sensor 15 and a rope-receiving tension sensor 20 are installed at the rope-releasing and rope-receiving places, and the PLC sets the tension according to the pulling force. The automatic tension controller 16/21 controls the tension according to the detected tension signal output by the tension sensor 15/20. No. 1 automatic tension controller 16 and No. 2 automatic tension controller 21 automatically adjust the braking torque of releasing the rope of the magnetic powder brake 17 and the magnetizing current of the torque of the magnetic powder clutch 22 of receiving the rope respectively. By the No. 1 sprocket wheel 18, change the braking torque of the measured steel wire rope 27 of the measured steel wire reel 19, control the tension of the rope; by the magnetic powder clutch 22 and the No. 2 sprocket wheel 24 controlled by the rope receiving motor 25 and the gear box 23, according to The torque produced by the magnetic powder clutch 22 to pay the magnetic current controls the rope-receiving speed of the rope-receiving disc 26, thereby controlling the rope-receiving tension.

The specific structure of wire rope tension detection transmission is shown in Figure 2. It consists of frequency conversion motor 1, gear box 2, main gear 3, No. 1 driven gear 4, No. 2 driven gear 5, No. 1 rope receiving drum 6, No. Receiving rope cylinder 7, No. 1 rope-releasing cylinder 8 and No. 2 rope-releasing cylinder 9, support 28, bearing block 29, No. 1 transmission shaft 30, No. 2 transmission shaft 31, upper support plate 32 and lower support plate 33 form. The transmission mechanism has good stability because the rotational torques of the two ropes during the rotation process are equal in magnitude and opposite in direction, and the two torques cancel each other out. The structure itself has sufficient rigidity and strength, so the smaller structure of the utility model can bear a larger load.

The utility model has the advantages of simple structure, low manufacturing cost, small volume, convenient installation and maintenance, simple control, no misalignment of rope release and take-up, large transmission torque, and simple speed regulation of steel wire rope, which can realize stepless speed change, and is suitable for measuring rope, The field of tension detection transmission and control devices for cables, wires, belts or similar flexible components.

Claims (8)

1. A transmission and control device for wire rope tension detection, comprising a power drive unit (A), and a hydraulic jacking unit (B) connected to the power drive unit and an electrical control unit (C), characterized in that the power drive unit (A), the hydraulic jacking unit (B) and the electrical control unit (C) are driven by a mechanical transmission chain to rotate. 2. The transmission and control device for wire rope tension detection as claimed in claim 1, wherein the power drive unit (A) is composed of a variable frequency motor (1), a gear box (2), a main gear (3) , No. 1 driven gear (4), No. 2 driven gear (5), No. 1 rope take-up drum (6), No. 2 rope take-up drum (7), No. 1 rope pay-off drum (8) and No. 2 rope pay-off The drum (9) is composed of; when starting, the frequency conversion motor drives the gear box, and then drives the No. 1 driven gear and the No. 2 driven gear through the main gear, and the two gear shafts drive the No. Rope drum and No. 1 rope-receiving drum, No. 2 rope-receiving drum rotate. 3. The transmission and control device for wire rope tension detection according to claim 2, characterized in that the diameter of the rope receiving drum is larger than the diameter of the rope releasing drum. 4. The transmission and control device for wire rope tension detection as claimed in claim 1, wherein said hydraulic jacking unit (B) consists of No. 1 pulley (10), No. 2 pulley (11), and No. 3 pulley ( 12), oil cylinder (13) and pressure transmitter (14); the three pulleys are connected to each other through a mechanical transmission chain belt, the pressure of the oil cylinder is transmitted to the programmable controller through the pressure transmitter, and the oil cylinder is controlled by the programmable controller Advance or retreat to control the increase or decrease of the wire rope tension of the pulley block. 5. The transmission and control device for wire rope tension detection according to claim 4, characterized in that said oil cylinder is controlled by a programmable controller to feed oil into port A or port B of the oil cylinder to keep the pressure constant. 6. The transmission and control device for wire rope tension detection as claimed in claim 1, characterized in that said electrical control unit (C) consists of a No. 1 automatic tension controller (16), an automatic adjustment magnetic powder brake (17), a No. sprocket (18), tested steel wire disc (19), No. 2 automatic tension controller (21), magnetic powder clutch (22), gear box (23), No. 2 sprocket (24), rope receiving motor (25 ), a rope reel (26) and a steel wire rope (27) to be measured are formed; The No. 1 automatic tension controller (16) adjusts and controls the release braking torque of the magnetic powder brake (17), and then changes the tension of the measured steel wire rope (27) in the tested steel wire reel (19) through the No. 1 sprocket (18). Braking torque to control the tension of the rope; No. two automatic tension controller (21) adjusts and controls the magnetic powder clutch (22) torque magnetic current, and then the rope motor (25) and gear box (23) pass through the magnetic powder clutch (22). Moment controls the second sprocket wheel (24) to adjust the rope-receiving speed of the rope-receiving dish (26). 7. The transmission and control device for wire rope tension detection as claimed in claim 1, characterized in that said electrical control unit (C) is equipped with a rope tension sensor (15), a rope tension Sensor (20); No. 1 automatic tension controller (16) and No. 2 automatic tension controller (21) control the tension according to the detection tension signal output by the tension sensor. 8. The transmission and control device for wire rope tension detection according to claim 1, characterized in that the pressure transmitter (14) in the hydraulic jacking unit (B) and the pressure transmitter (14) in the electric control unit (C) are Rope tension sensor (15), No. 1 automatic tension controller (16), magnetic powder brake (17), rope tension sensor (20), No. 2 automatic tension controller (21), magnetic powder clutch (22) through programmable control The device forms a closed-loop control.

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