CN111900004A - Interlocking device of emergency power supply double switches - Google Patents

Abstract

The invention provides an interlocking device for emergency power supply double switches, which includes a switch cabinet, a first three-station mechanism and a second three-station mechanism installed inside the switch cabinet. The first three-station mechanism is installed with a The crank arm is connected with the interlocking baffle through the pulley assembly. A guide rod is installed at the bottom of the switch cabinet. The guide rod is sleeved with a guide rail that can move up and down. The guide rail is fixedly connected with the interlocking baffle. The interlocking baffle An indicator plate for displaying the plug-in state is fixed on it, the second three-position mechanism is connected with the interlock bracket through the connecting component, the other end of the interlock bracket is assembled and connected with the interlock rod, and the front of the interlock baffle is installed with the switch cabinet. The external small door is physically connected, and the cable compartment door installed on the switch cabinet is arranged directly below the external small door. The invention has simple interlocking structure, complete functions, convenient installation, good safety and high transmission efficiency.

Description

An interlocking device for emergency power supply double switches

technical field

The invention relates to the technical field of switch cabinet opening and interlocking, in particular to an interlocking device for emergency power supply double switches.

Background technique

The main function of the switch cabinet is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices.

The existing switchgear on the market needs to be powered off during maintenance. In the absence of a ring network system, it is difficult to provide uninterrupted maintenance for customers. For this reason, the State Grid proposes an integrated switch scheme. The existing integrated switches on the market are all dual-cable solutions integrated on the PT switchgear. Due to the limitations of the technical requirements of the State Grid, the protection requirements of most of its products are incomplete, and the interlocking is simple and cannot meet the requirements.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the defects existing in the prior art. The present invention proposes an interlocking device for emergency power supply double switches. The present invention has a simple interlocking structure, complete functions, convenient installation, good safety and transmission efficiency. high.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present invention is: an interlocking device for emergency power supply double switches, comprising a switch cabinet and a first three-station mechanism and a second three-station mechanism installed inside the switch cabinet. , The first three-station mechanism is equipped with a crank arm, and the crank arm is connected with the interlocking baffle through a pulley assembly. A guide rod is installed at the bottom of the switch cabinet. The guide rod is sleeved with a guide rail that can move up and down. The locking baffle is fixedly connected, the interlocking baffle is fixed with an indicator for displaying the plugging state, the second three-position mechanism is connected with the interlocking bracket through the connecting component, and the other end of the interlocking bracket is assembled and connected with the interlocking rod. An external small door movably connected with the switch cabinet body is installed in front of the interlocking baffle, and a cable compartment door installed on the switch cabinet body is arranged just below the external small door.

Further, the pulley assembly includes a pulley support and a wire rope, a pulley support is installed inside the switch cabinet near the arm, a first pulley and a second pulley are installed on the pulley support, and the wire rope goes around the first pulley and the second pulley. One end of the second pulley is connected with the crank arm, and the other end is connected with the interlocking baffle.

Further, the connecting assembly includes a fixing frame and a cam, a fixing frame is fixed at the bottom of the second three-station mechanism, and a cam installed on the second three-station mechanism is arranged directly above the fixing frame, and the interlocking bracket can be installed along the second three-station mechanism. The fixed frame moves up and down, and a retraction spring is installed between the fixed frame and the fixed frame.

Further, a beam for restricting the upward movement of the interlocking baffle is fixed inside the switch cabinet, and a square hole for the up and down movement of the indicator is opened on the beam.

Further, a limit plate fixed on the inner wall of the switch cabinet is installed on the top of the guide rod, and a spring is sleeved on one end of the guide rod close to the limit plate.

Further, the upper side of the external small door is provided with a small door installed on the switch cabinet body, the rear side is provided with a pressure plate fixed on the inner wall of the switch cabinet, the pressure plate is connected with a cable bushing, and the cable bushing is sealed by a plug. .

Further, bolts are installed at the rear end of the crank arm, hook plates are installed on the outer door, and the inner walls of the hook plates are fitted with the bolts.

Further, a pluggable board cable is installed on the rear side of the indicator, and a plurality of arc grooves are opened on the interlocking baffle.

Further, a jack is provided on the top of the cable compartment door, and the interlock rod is assembled and connected to the cable compartment door by plugging.

Compared with the prior art, the interlocking device of the emergency power supply double switch of the present invention has the following beneficial effects:

1. The interlocking of the present invention uses the type of pulley wire for transmission, which greatly reduces the space occupied by the structure. The interlocking transmission adopts the type of pulley and guide rail, which improves the smoothness of transmission and the efficiency of interlocking.

2. The interlock of the present invention is set as a double-door interlocking type, one set of cables for one door, which improves the safety of the switch, the modular design of the interlock is convenient for installation, and is suitable for different double-switch systems.

Description of drawings

The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the accompanying drawings are for illustrative purposes only, and are not intended to limit the protection scope of the present invention. In the drawings, the same reference numerals are used to refer to the same parts. in:

FIG. 1 schematically shows an internal structure diagram of an interlocking device for emergency power supply double switches according to an embodiment of the present invention;

FIG. 2 schematically shows a front view of an interlocking device for an emergency power supply double switch according to an embodiment of the present invention;

Fig. 3 schematically shows an enlarged view of A in an interlocking device for emergency power supply double switches according to an embodiment of the present invention;

Labels in the figure: 1-Pulley bracket, 2-First three-station mechanism, 3-Crutch arm, 4-Spring, 5-Limit plate, 6-Guide rail, 7-Guide rod, 8-Interlock bracket, 9- Interlock rod assembly, 10-beam, 11-indicator, 12-interlocking shutter, 13-plug, 14-small door, 15-external small door, 16-cable door, 17-first pulley, 18 - Conductor rope, 19 - second pulley, 20 - switch cabinet, 21 - second three-station mechanism.

Detailed ways

It is easy to understand that, according to the technical solutions of the present invention, without changing the essential spirit of the present invention, those skilled in the art can propose various alternative structures and implementations. Therefore, the following specific embodiments and accompanying drawings are only exemplary descriptions of the technical solutions of the present invention, and should not be regarded as the whole of the present invention or as limitations or restrictions on the technical solutions of the present invention.

An embodiment according to the present invention is shown in conjunction with FIGS. 1-3 . An interlocking device for emergency power supply double switches, comprising a switch cabinet body 20 and a first three-station mechanism 2 and a second three-station mechanism 21 installed inside the switch cabinet body 20, and the first three-station mechanism 2 is installed on the There is a turning arm 3, the turning arm 3 is connected with the interlocking baffle plate 12 through a pulley assembly, a guide rod 7 is installed at the bottom of the switch cabinet 20, and a guide rod 7 is sleeved with a guide rail 6 that can move up and down, and the guide rail 6 is connected to the interlock. The baffle 12 is fixedly connected, the interlocking baffle 12 is fixed with an indicator 11 for displaying the plugging state, the second three-position mechanism 21 is connected with the interlocking bracket 8 through the connecting assembly, and the other end of the interlocking bracket 8 is connected to the interlocking bracket 8 . The locking rod assembly 9 is connected, an external small door 15 movably connected to the switch cabinet 20 is installed in front of the interlocking baffle 12 , and a cable compartment door 16 installed on the switch cabinet 20 is provided directly below the external small door 15 .

The pulley assembly includes a pulley bracket 1 and a wire rope 18. A pulley bracket 1 is installed inside the switch cabinet 20 near the arm 3. A first pulley 17 and a second pulley 19 are installed on the pulley bracket 1. The wire rope 18 bypasses the first pulley 17. One end of a pulley 17 and a second pulley 19 are connected to the crank arm 3, and the other end is connected to the interlocking baffle 12, and are driven along the pulley by the wire rope 18, which improves the smoothness of transmission and the efficiency of interlocking. Frame and cam, a fixed frame is fixed at the bottom of the second three-station mechanism 21, and a cam installed on the second three-station mechanism 21 is arranged just above the fixed frame. The interlocking bracket 8 can move up and down along the fixed frame, and is fixed with A retraction spring is installed between the frames, the cam is driven to rotate by the second and third station mechanism 21, and the interlock bracket 8 moves up and down through the fixed frame and the retraction spring.

A beam 10 is fixed inside the switch cabinet 20 to restrict the upward movement of the interlocking baffle plate 12. The beam 10 is provided with a square hole for the up and down movement of the indicator 11. The square hole facilitates the up and down movement of the indicator 11, and laterally restricts the interlocking baffle. 12 Continue to move up, the beam 10 is between the small door 14 and the external small door 15, to improve the protection level, the top of the guide rod 7 is installed with a limit plate 5 fixed on the inner wall of the switch cabinet 20, and the guide rod 7 is close to the limit plate 5. A spring 4 is sleeved at one end. Through the spring 4, when the interlocking baffle 12 is not affected by external force, the guide rail 6 drives the interlocking baffle 12 to return to the original position along the guide rod 7. The small door 14 on the switch cabinet body 20 is provided with a pressure plate fixed on the inner wall of the switch cabinet body 20 on the rear side. The pressure plate is connected with a cable bushing. Sealing is performed to prevent leakage and breakdown of the cable bushing, the cable bushing is stably connected through the pressure plate, and the components inside the switch cabinet body 20 are conveniently assembled through the small door 14 .

A bolt is installed at the end of the arm 3, and a hook plate is installed on the outer door 15. The inner wall of the hook plate is in contact with the bolt. The bolt rotates along the arm 3 and separates from the hook plate to open the outer door 15, and the bolt blocks the interlock. The baffle 12 is not allowed to be lifted artificially to prevent misoperation. A pluggable cable is installed on the rear side of the indicator 11. The interlocking baffle 12 is provided with a plurality of arc grooves, which can be easily connected through the cable plug. Electric, arc-shaped grooves prevent the interlocking baffle 12 from causing damage to the cables when the cables are connected, the top of the cable compartment door 16 is provided with a socket, the interlocking rod assembly 9 is plugged and connected to the cable compartment door 16, and the interlocking rod assembly 9 is inserted into the inside of the cable compartment door 16 to prevent the cable compartment door 16 from opening, and the interlock lever assembly 9 is separated from the socket to facilitate the opening of the cable compartment door 16.

In this embodiment, as shown in FIG. 1 , the first three-station mechanism 2 is in the grounding position. When the first three-station mechanism 2 is divided from the grounding to the grounding position, the rotating shaft on the first three-station mechanism 2 drives the hinge When the arm 3 rotates, the turning arm 3 pulls the wire rope 18 to move along the first pulley 17 and the second pulley 19, so that the tail end of the wire rope 18 exerts an upward force on the interlocking baffle 12, and the interlocking baffle 12 passes through the guide rail 6 Move up along the guide rod 7, the guide rail 6 moves up to compress the spring 4, the interlocking baffle 12 moves up and drives the indicator 11 to move upward, and the indicator 11 moves upward. The interlocking baffle 12 no longer blocks the plug 13 position, the indicator 11 moves up to display the pluggable board cable, and at the same time, the arm 3 drives the bolt to separate from the hook plate when rotating, the external small door 15 is in an open state, the first three-station mechanism 2 reaches the grounding position, and the operator removes it. Plug 13, install the emergency power supply cable through the cable bushing.

When the second three-station mechanism 21 is moved from the ground to the grounding position, the rotating shaft on the second and third-station mechanism 21 drives the cam to rotate, and the cam rotates and retracts the spring to generate an upward force on the interlocking bracket 8, and the interlocking bracket 8 moves in the same direction. As the fixed frame moves upward, the upward movement of the interlock bracket 8 drives the interlock rod assembly to move upward, and when the second three-position mechanism 21 is grounded, the cable compartment door 16 can be opened.

After the cable installation is completed, when the first three-station mechanism 2 is divided from the grounding position to the grounding position, the rotating shaft on the first three-station mechanism 2 drives the arm 3 to rotate in the opposite direction, and the interlocking position returns to the state shown in FIG. 1 . The interlocking baffle 12 blocks the plug 13 and does not allow operation, and the indicator 11 shows the state of unplugging and unplugging. The bolts under the arm 3 block the interlocking baffle 12 and prevent it from being artificially lifted to prevent misoperation. .

The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various deformations and modifications to the above-mentioned embodiments without departing from the technical idea of the present invention, and these deformations and modifications should belong to within the protection scope of the present invention.

Claims (9)

1. An interlocking device for emergency power supply double switches, characterized in that it comprises a switch cabinet (20) and a first three-station mechanism (2) and a second three-station mechanism (2) installed inside the switch cabinet (20). Mechanism (21), a crank arm (3) is installed on the first three-station mechanism (2), and the crank arm (3) is connected with the interlocking baffle plate (12) through the pulley assembly (1), and the switch cabinet body (20) ) A guide rod (7) is installed at the bottom, a guide rail (6) that can move up and down is sleeved on the guide rod (7), the guide rail (6) is fixedly connected with the interlocking baffle (12), and the interlocking baffle (12) An indicator plate (11) for displaying the plugging and unplugging state is fixed thereon, the second three-station mechanism (21) is connected with the interlocking bracket (8) through the connecting assembly, and the other end of the interlocking bracket (8) is assembled with the interlocking rod (9) connected, an external small door (15) movably connected with the switch cabinet body (20) is installed in front of the interlocking baffle plate (12), and a small external door (15) is installed on the switch cabinet body ( 20) on the cable compartment door (16). 2. An interlocking device for emergency power supply double switches according to claim 1, characterized in that the pulley assembly (1) comprises a pulley bracket and a wire rope (18), and the inside of the switch cabinet (20) is close to the switch A pulley bracket is installed on one side of the arm (3), a first pulley (17) and a second pulley (19) are installed on the pulley bracket, and the wire rope (18) goes around the first pulley (17) and the second pulley (19) One end is connected with the crank arm (3), and the other end is connected with the interlocking baffle plate (12). 3 . The interlocking device for emergency power supply double switches according to claim 1 , wherein the connecting assembly comprises a fixing frame and a cam, and a fixing frame is fixed at the bottom of the second three-station mechanism ( 21 ). 4 . , a cam installed on the second and third station mechanism (21) is arranged just above the fixed frame, the interlock bracket (8) can move up and down along the fixed frame, and a retraction spring is installed between the fixed frame. 4. The interlocking device for emergency power supply double switches according to claim 1, wherein a beam (10) that restricts the upward movement of the interlocking baffle plate (12) is fixed inside the switch cabinet (20). , the beam (10) is provided with a square hole for the sign (11) to move up and down. 5 . The interlocking device for emergency power supply double switches according to claim 1 , wherein a limit plate ( 5 ) fixed on the inner wall of the switch cabinet ( 20 ) is installed on the top of the guide rod ( 7 ). 6 . A spring (4) is sleeved on one end of the guide rod (7) close to the limit plate (5). 6. An interlocking device for emergency power supply double switches according to claim 1, wherein a small door (14) installed on the switch cabinet body (20) is provided on the upper side of the external small door (15). ), the rear side is provided with a pressure plate fixed on the inner wall of the switch cabinet body (20), the pressure plate is connected with a cable bushing, and the cable bushing is sealed by a plug (13). 7. An interlocking device for emergency power supply double switches according to claim 1, characterized in that, bolts are installed at the rear end of the arm (3), and a hook plate is installed on the outer door (15), the hook The inner wall of the plate is fitted with the bolts. 8. An interlocking device for emergency power supply double switches according to claim 1, characterized in that a pluggable board cable is installed on the rear side of the indicator (11), and a pluggable board cable is installed on the rear side of the indicator (11). A plurality of arc grooves are opened. 9 . The interlocking device for emergency power supply double switches according to claim 1 , wherein a jack is provided on the top of the cable compartment door ( 16 ), and the interlock rod assembly ( 9 ) is connected to the cable compartment. 10 . The door (16) is plug-in connection.

Images