Low pressure micro-motion interlock

Abstract

The utility model discloses a kind of low pressure micro-motion locking devices, be set to be locked to operating shaft at low pressure, including locking assembly and electromagnetic lock, the support of locking assembly is provided with movable lock piece, electromagnetic lock is through the movement path of lock piece to be shielded or released;When movement path is shielded, lock piece is limited on the insertion path of operating tool and cannot move;After movement path is released, operating tool can push lock piece from its insertion path, and operating shaft is operated.The utility model is locked to operating shaft at low pressure by the cooperation of the lock piece that can be translated and electromagnetic lock, simple structure, transmission component and transmission number are less, not only save installation space, but also reduce the failure probability of wear and tear, reduce failure rate, improve the stability and reliability of locking.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a low-pressure micro-motion interlocking device. Background Technology

[0002] Gas-insulated switchgear is a common electrical device in power supply systems. Due to its advantages such as good power supply performance, safety and reliability, and high cost performance, it has been widely used in power supply networks of urban communities, large buildings, and industrial enterprises.

[0003] Gas-insulated switchgear contains a gas-insulating gas chamber filled with a pressurized insulating gas to ensure its insulation and arc-extinguishing capabilities. The gas pressure within the gas chamber is directly related to the switch's insulation and arc-extinguishing capabilities. If the switchgear leaks, causing the gas pressure in the chamber to drop below the product's minimum functional pressure, it will reduce the internal insulation resistance of the switch and make it difficult to extinguish the arc at the contact points, significantly reducing its insulation and arc-extinguishing capabilities. Operating the switchgear under these conditions may result in switching failure or even internal short-circuit faults, endangering the safety of the personnel operating the switchgear. Therefore, a reliable interlocking device is needed to reliably lock the operating mechanism of the gas-insulated switchgear under low pressure conditions.

[0004] Existing low-pressure interlocking devices have complex structures and require multiple stages of transmission for interlocking, resulting in insufficient stability and reliability of the interlocking mechanism. Utility Model Content

[0005] In response to the shortcomings of existing low-pressure interlocking devices, the applicant provides a low-pressure micro-motion interlocking device with a reasonable structure, simple structure, and high interlocking stability and reliability.

[0006] The technical solution adopted in this utility model is as follows: A low-pressure micro-motion locking device is configured to lock an operating shaft under low pressure. It includes a locking assembly and an electromagnetic lock. A movable locking plate is provided on the support of the locking assembly. The electromagnetic lock blocks or releases the movement path of the locking plate through a locking rod. When the movement path is blocked, the locking plate is restricted to the insertion path of the operating tool and cannot move. When the movement path is released, the operating tool can push the locking plate away from its insertion path and operate the operating shaft.

[0007] As a further improvement to the above technical solution: A micro switch is installed on one side of the locking plate. When the locking plate moves, pressing the button of the micro switch will cut off the power to the motor.

[0008] The locking plate is equipped with a limit structure to limit the movement of the locking plate.

[0009] The limiting structure includes a limiting screw and a limiting step. The limiting screw is connected to one end of the locking plate, and the limiting step is located at the other end of the locking plate.

[0010] The locking plate is equipped with a reset spring.

[0011] The locking plate is equipped with a guide plate, which is bent toward the insertion direction of the operating tool to form an inclined guide surface.

[0012] The support is provided with a first support plate and a second support plate at intervals. The first support plate has a first sliding groove and the second support plate has a second sliding groove. The locking piece is provided with a first sliding piece and a second sliding piece. The first sliding piece and the second sliding piece are connected by a connecting piece. The first sliding piece can slide horizontally in the first sliding groove of the first support plate and the second sliding piece can slide horizontally in the second sliding groove of the second support plate.

[0013] The width of the first sliding part of the locking plate is greater than the width of the connecting part. The two sides of the first sliding part transition to the connecting part through bevels. When the locking plate moves, the bevels press the button of the micro switch.

[0014] The width of the second sliding plate is smaller than the width of the connecting plate, forming a limiting step between the two. The spring is sleeved on the second sliding plate and located between the limiting step and the second support plate of the support.

[0015] The first slide of the first support plate of the support has an opening at the top. The width of the opening is smaller than the width of the first slide. The opening corresponds to the guide plate and makes way for the movement of the guide plate.

[0016] The beneficial effects of this utility model are as follows: This invention achieves locking of the operating shaft under low pressure by using a movable locking plate in conjunction with an electromagnetic lock. It has a simple structure, fewer transmission components and transmission stages, which not only saves installation space, but also reduces the probability of wear failure, lowers the failure rate, and improves the stability and reliability of the locking. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 The diagram shows the structure of the locking assembly. a) is a perspective view, and b) is a top view.

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the support.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the locking plate.

[0021] Figure 5 This is a diagram showing the unlocked state and no operation on the operating axis.

[0022] Figure 6 This is a schematic diagram of the operation of the control axis in the unlocked state. a) is the front view and b) is the top view.

[0023] Figure 7 This is a diagram illustrating the locked state.

[0024] In the picture: 10. Locking assembly; 1. Support; 11. First support plate; 111. First slide groove; 112. Opening; 12. Second support plate; 121. Second slide groove; 2. Locking plate; 21. First sliding plate part; 22. Second sliding plate part; 23. Connecting plate part; 24. Inclined edge; 25. First limiting step; 26. Second limiting step; 27. Guide plate; 3. Spring; 4. Limiting screw; 20. Electromagnetic lock; 201. Locking bar; 30. Micro switch; 301. Button; 100. Operating axis. Detailed Implementation

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the low-pressure micro-motion interlocking device of this utility model is installed on one side of the operating shaft 100 of the operating mechanism of the gas-insulated switchgear. It includes an interlocking assembly 10, an electromagnetic lock 20, and a micro switch 30. The operating shaft 100 and the electromagnetic lock 20 are located on the outer sides of opposite ends of the movable part of the interlocking assembly 10, and the micro switch 30 is located on one side of the movable part of the interlocking assembly 10. When the pressure is low, the electromagnetic lock 20 blocks the movement path of the movable part of the interlocking assembly 10, preventing its movement. The movable part also blocks the insertion path of the operating tool on the operating shaft 100, thus locking the operating shaft 100. The micro switch 30 controls the de-energization of the motor when the movable part of the interlocking assembly 10 moves, preventing misoperation.

[0027] like Figure 2As shown, the locking assembly 10 includes a support 1, a locking plate 2, a spring 3, and a limiting screw 4. The locking plate 2 is slidably mounted on the support 1 and can move between the operating shaft 100 and the electromagnetic lock 20. The spring 3 is sleeved on the locking plate 2 to reset the moved locking plate 2. The limiting screw 4 is connected to the part of the locking plate 2 that protrudes from the support 1 to limit the movement of the locking plate 2 and prevent the locking plate 2 from sliding off the support 1. When the locking assembly 10 is locked, the movement path of the locking plate 2 is blocked by the electromagnetic lock 20, and the locking plate 2 is limited to the insertion path of the operating tool and cannot move, preventing the operating tool from operating the operating shaft 100. When the locking assembly 10 is unlocked, the electromagnetic lock 20 releases the obstruction to the movement path of the locking plate 2, allowing the operating tool to operate the operating shaft 100. The movement of the locking plate 2 is limited by the limiting screw 4. After removing the limiting screw 4, the locking plate 2 can be pulled out from the support 1 and replaced with a locking plate 2 of other specifications. It can be adapted to the operating shaft 100 of different sizes and specifications, and has high versatility.

[0028] like Figure 3 As shown, a first support plate 11 and a second support plate 12 are vertically spaced on the support 1. The first support plate 11 is close to the operating shaft 100, and the second support plate 12 is close to the electromagnetic lock 20. A first sliding groove 111 is formed on the first support plate 11, and an opening 112 is formed at the top of the first sliding groove 111. The width of the opening 112 is smaller than the width of the first sliding groove 111. A second sliding groove 121 is formed on the second support plate 12.

[0029] like Figure 4 As shown, the locking piece 2 is provided with a first sliding piece 21 and a second sliding piece 22, for reference. Figure 2 The first sliding plate 21 is slidably disposed within the first sliding groove 111 of the first support plate 11, and the second sliding plate 22 is slidably disposed within the second sliding groove 121 of the second support plate 12. Figure 4 As shown, the first sliding portion 21 and the second sliding portion 22 of the locking piece 2 are connected by a connecting piece 23. The width of the first sliding portion 21 is greater than the width of the connecting piece 23, and both sides of the first sliding portion 21 transition to the connecting piece 23 via inclined edges 24. The width of the second sliding portion 22 is less than the width of the connecting piece 23, and a first limiting step 25 is formed between them; (Refer to...) Figure 2 Spring 3 is sleeved on the second sliding plate 22, located between the first limiting step 25 and the second support plate 12 of the support 1. One end of spring 3 abuts against the first limiting step 25, and the other end abuts against the second support plate 12. Figure 4 As shown, a second limiting step 26 is provided on the first sliding portion 21 near the end of the operating shaft 100, extending outward in the width direction. (Refer to...) Figure 2 , Figure 6 The second limiting step 26 limits the movement of the locking piece 2, preventing it from sliding off the first support plate 11 of the support 1. Figure 4 As shown, a guide plate 27 is formed by bending at the center of the end of the first sliding plate 21 near the operating shaft 100. The guide plate 27 and the first sliding plate 21 form an acute angle. The guide plate 27 is bent toward the insertion direction of the operating tool on the operating shaft 100 and forms an inclined guide surface facing the insertion direction of the operating tool. When the operating tool is inserted into the operating shaft 100, it abuts against the guide surface of the guide plate 27 and pushes the locking piece 2 along its insertion path. The opening 112 of the first support plate 11 corresponds to the guide plate 27, allowing room for the movement of the guide plate 27.

[0030] like Figure 1 As shown, the electromagnetic lock 20 is provided with a retractable locking rod 201. When the locking rod 201 is extended, it blocks the movement path of the locking plate 2 of the locking assembly 10. According to actual needs, the locking logic of the locking rod 201 can be that it extends to block when energized and retracts when de-energized, or it can be that it retracts without blocking when energized and extends to block when de-energized.

[0031] like Figure 1 As shown, a button 301 is provided on the micro switch 30. The button 301 extends out on the movement path of the locking plate 2 of the locking assembly 10. When the locking plate 2 moves away from the operating shaft 100, its inclined side 24 presses the button 301 to realize the power-off control of the motor.

[0032] In actual use, this utility model is: When the air pressure of the switchgear is at the rated value, the switchgear can operate normally; if Figure 5 As shown, at this time, the locking rod 201 of the electromagnetic lock 20 retracts and is removed from the movement path of the locking plate 2, allowing the operating tool to push open the locking plate 2 and insert it onto the operating shaft 100; as Figure 6 As shown, when the operating tool is inserted, the locking piece 2 is pushed open from its insertion path and inserted into the operating shaft 100 to operate the switching device. During the process of being pushed open and moving, the locking piece 2 presses the button 301 of the micro switch 30 to control the motor to cut off the power.

[0033] When the air pressure of the switchgear is lower than the rated value, the switchgear sends a low air pressure signal to the electromagnetic lock 20, such as... Figure 7 As shown, after receiving the signal, the electromagnetic lock 20 extends the locking rod 201 and blocks the movement path of the locking piece 2. The movement of the locking piece 2 is stopped, and the locking piece 2 locks the insertion path of the operating tool, preventing the operating tool from operating the operating shaft 100, thereby realizing the locking operation of the operating shaft 100.

[0034] This invention achieves locking of the operating shaft 100 under low pressure by cooperating with the movable locking plate 2 and the electromagnetic lock 20. The structure is simple, with fewer transmission components and transmission stages, which not only saves installation space, but also reduces the probability of wear failure, lowers the failure rate, and improves the stability and reliability of the locking.

[0035] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A low-pressure micro-motion locking device, configured to lock the operating shaft (100) under low pressure, characterized in that: The device includes a locking assembly (10) and an electromagnetic lock (20). The locking assembly (10) has a movable locking plate (2) on its support (1). The electromagnetic lock (20) blocks or releases the movement path of the locking plate (2) through the locking rod (201). When the movement path is blocked, the locking plate (2) is restricted to the insertion path of the operating tool and cannot move. When the movement path is released, the operating tool can push the locking plate (2) away from its insertion path and operate the operating shaft (100).

2. The low-pressure micro-motion interlocking device according to claim 1, characterized in that: A micro switch (30) is provided on one side of the locking plate (2). When the locking plate (2) moves, the button (301) of the micro switch (30) is pressed to cut off the power to the motor.

3. The low-pressure micro-motion interlocking device according to claim 1, characterized in that: A limit structure is provided on the locking piece (2) to limit the movement of the locking piece (2).

4. The low-pressure micro-motion interlocking device according to claim 3, characterized in that: The limiting structure includes a limiting screw (4) and a limiting step. The limiting screw (4) is connected to one end of the locking plate (2), and the limiting step is set at the other end of the locking plate (2).

5. The low-pressure micro-motion interlocking device according to claim 1, characterized in that: A reset spring (3) is provided on the locking plate (2).

6. The low-pressure micro-motion interlocking device according to claim 1, characterized in that: The locking plate (2) is provided with a guide plate (27), which is bent toward the insertion direction of the operating tool and forms an inclined guide surface.

7. The low-pressure micro-motion interlocking device according to claim 1, characterized in that: The support (1) is provided with a first support plate (11) and a second support plate (12) at intervals. The first support plate (11) is provided with a first sliding groove (111) and the second support plate (12) is provided with a second sliding groove (121). The locking piece (2) is provided with a first sliding piece (21) and a second sliding piece (22). The first sliding piece (21) and the second sliding piece (22) are connected by a connecting piece (23). The first sliding piece (21) can slide horizontally in the first sliding groove (111) of the first support plate (11) and the second sliding piece (22) can slide horizontally in the second sliding groove (121) of the second support plate (12).

8. The low-pressure micro-motion interlocking device according to claim 2 or 7, characterized in that: The width of the first sliding part (21) of the locking piece (2) is greater than the width of the connecting piece (23). The two sides of the first sliding part (21) are respectively connected to the connecting piece (23) through the inclined edge (24). When the locking piece (2) moves, the inclined edge (24) presses the button (301) of the micro switch (30).

9. The low-pressure micro-motion interlocking device according to claim 5 or 7, characterized in that: The width of the second sliding plate (22) is smaller than the width of the connecting plate (23), forming a limiting step between the two. The spring (3) is sleeved on the second sliding plate (22) and located between the limiting step and the second support plate (12) of the support (1).

10. The low-pressure micro-motion interlocking device according to claim 6 or 7, characterized in that: The first groove (111) of the first support plate (11) of the support (1) has an opening (112) at the top. The width of the opening (112) is smaller than the width of the first groove (111). The opening (112) corresponds to the guide plate (27) and makes way for the movement of the guide plate (27).

Images