Relay protection secondary pressure plate anti-misoperation device

Abstract

The present invention discloses a device for preventing misoperation of a secondary pressure plate of a relay protection, comprising a locking member and a limiting member, wherein the locking member comprises a housing, a clamping jaw, a thrust member and a first elastic member for driving the clamping jaw to unfold, a first opening and a second opening are respectively arranged at opposite ends of the housing, the clamping jaw is slidably arranged in the housing, the thrust member can push the clamping jaw to move so as to be selectively located in an unfolded state and a closed state, a locking hole is arranged on the thrust member, the locking hole is located outside the housing and is selectively provided with a lock, the lock can lock the clamping jaw in a closed state, the limiting member is provided with a limiting hole, the shape of the limiting hole matches the shape of the housing, the housing passes through the limiting hole and is clamped in the limiting hole, so that the lock and the clamping jaw are respectively located on opposite sides of the limiting member. The device for preventing misoperation of a secondary pressure plate of a relay protection of the present invention can quickly lock the secondary pressure plate, prevent the secondary pressure plate from changing the operating state due to erroneous rotation, ensure the normal operation of the primary equipment, and is simple to operate.

Description

Technical Field

[0001] The invention relates to the technical field of safe misoperation prevention of electric power systems, and in particular to a device for preventing misoperation of a secondary pressure plate of a relay protection. Background Art

[0002] The secondary equipment in the power system is an important part of the safe operation of the power grid. It monitors, measures, operates and controls the primary equipment and plays a protective role. For example, the secondary pressure plate is the key to connecting and disconnecting the protection device function and the tripping output circuit. The secondary pressure plate is also called the protection link and is an important part of the relay protection system. The secondary pressure plate has three states: input, maintenance, and standby. Whether the secondary pressure plate is correctly input or exited is directly related to whether the protection device can operate correctly and reliably remove the fault to achieve its due protection function.

[0003] In actual work, the operating state of the secondary pressure plate of the protection device will be changed due to the need for operation and maintenance personnel to stop or supply power or for maintenance personnel to debug the protection device and the need for the primary system to adjust the operating mode, so as to realize the protection function of the primary operating equipment under a specific operating mode. However, since the current secondary pressure plates usually adopt prompt measures and the number of secondary pressure plates is large, it is easy to make mistakes and adjust the secondary pressure plates that do not need to change the state, resulting in the primary equipment being unable to operate normally. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide a device for preventing misoperation of a secondary pressure plate of a relay protection, which has a simple structure and can prevent misoperation of the secondary pressure plate during operation and maintenance.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A relay protection secondary pressure plate anti-misoperation device is provided, wherein the secondary pressure plate is rotatably arranged on a mounting plate of a primary device, and the relay protection secondary pressure plate anti-misoperation device comprises:

[0007] A locking member, comprising a shell, a clamping jaw, a first elastic member and a thrust member, wherein the first opening and the second opening are respectively arranged at opposite ends of the shell, the clamping jaw is slidably arranged in the shell, one end of the thrust member is located outside the shell, and the other end passes through the first opening and is located in the shell and connected to the clamping jaw, the first elastic member is connected to the clamping jaw to drive the clamping jaw to always be in an extended state, the thrust member can push the clamping jaw to move so as to be selectively in an extended state and a closed state, when the clamping jaw moves from the second opening to the outside of the shell, the clamping jaw is in an extended state, and when the clamping jaw is partially located in the shell, the clamping jaw is in a closed state, a lock hole is penetrated through the thrust member, the lock hole is located outside the shell and is selectively provided with a lock, and the lock can lock the clamping jaw in a closed state;

[0008] The limiting member is provided with a penetrating limiting hole, the shape of which matches the shape of the shell, and the shell passes through the limiting hole and is clamped in the limiting hole, so that the lock and the clamp are respectively located on opposite sides of the limiting member.

[0009] As a preferred solution of the device for preventing misoperation of the secondary pressure plate of the relay protection, the size of the lock is larger than the size of the limiting hole.

[0010] As a preferred solution of the device for preventing misoperation of the secondary pressure plate of the relay protection, a plurality of the limiting holes are arranged at intervals on the limiting member, and the limiting holes correspond one-to-one to the secondary pressure plate on the mounting plate.

[0011] As a preferred solution of the device for preventing misoperation of the secondary pressure plate of the relay protection, a connecting piece detachably connected to the mounting plate is provided on the limiting piece.

[0012] As a preferred solution of the relay protection secondary pressure plate anti-misoperation device, the clamp includes two claw bodies, a slider is slidably arranged in the shell, the slider is provided with a hinge hole, a rotating shaft is provided in the hinge hole, the rotating shaft is connected to the two claw bodies, and the first elastic member is sleeved on the rotating shaft to drive the two claw bodies to always have a tendency to rotate in opposite directions.

[0013] As a preferred solution of the relay protection secondary pressure plate anti-misoperation device, the slider is connected to the thrust piece through a connecting rod, a stopper is fixedly arranged in the shell, the clamping claw and the thrust piece are respectively located on both sides of the stopper, a first through hole is penetrated by the stopper, one end of the connecting rod is connected to the slider, and the other end passes through the first through hole and is connected to the thrust piece, a second elastic piece is arranged between the stopper and the thrust piece, and the second elastic piece always has a tendency to drive the thrust piece to move toward the outside of the shell.

[0014] As a preferred solution of the relay protection secondary pressure plate anti-misoperation device, the block is provided with two first through holes spaced apart along the length direction, and the two first through holes are symmetrically arranged along the center of the block, and two connecting rods are provided, and the two connecting rods are respectively inserted into the two first through holes to connect the thrust piece and the clamp, and each of the connecting rods is sleeved with the second elastic piece.

[0015] As a preferred solution of the relay protection secondary pressure plate anti-misoperation device, the shell is provided with a first protrusion protruding toward the center of the second opening, and the slider is provided with a second protrusion protruding, and the second protrusion can abut against the first protrusion to limit the slider from moving to the outside of the shell.

[0016] As a preferred solution of the device for preventing misoperation of the secondary pressure plate of the relay protection, the side surface of the first protrusion facing the center of the second opening is inclined from the inside of the shell toward the outside of the shell.

[0017] As a preferred solution of the relay protection secondary pressure plate anti-misoperation device, the shell is circumferentially provided with a boss at one end of the first opening, and the boss can abut against the outer wall of the limit member so that the limit member can be tightly pressed against the mounting plate.

[0018] The beneficial effects of the present invention are as follows: the housing of the locking member can be clamped in the limiting hole of the limiting member, thereby limiting the rotation of the locking member, and at the same time, one end of the locking member having a clamping claw passes through the limiting hole, so that the thrust member and the clamping claw are located on opposite sides of the limiting member, and when the thrust member pushes the clamping claw to move outside the housing, the clamping claw can automatically unfold under the elastic force of the first elastic member, so that the secondary pressure plate to be locked is located within the clamping range of the clamping claw, and then the thrust member is driven to pull the clamping claw to move into the housing, and when the clamping claw is partially located in the housing, the clamping claw is in a closed state and can clamp the secondary pressure plate, at this time, the locking hole of the thrust member is located outside the housing, and the thrust member can be locked using a lock to limit the movement of the thrust member and the clamping claw, and the clamping claw is locked in a closed state and keeps clamping the secondary pressure plate, thereby limiting the rotation of the secondary pressure plate in the maintenance state. This design is simple to operate, can quickly lock the secondary pressure plate, and prevent the secondary pressure plate from changing its operating state due to erroneous rotation during operation and maintenance, thereby ensuring the normal operation of the primary equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic structural diagram of a mounting plate and a secondary pressing plate according to an embodiment of the present invention.

[0021] Figure 2 It is a three-dimensional view of a locking member according to an embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional view of the locking member when it is unfolded according to the embodiment of the present invention.

[0023] Figure 4 This is a cross-sectional view of the locking member of the embodiment of the present invention when it is closed.

[0024] Figure 5 It is a schematic structural diagram of a position limiting member according to an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Locking member; 11. Housing; 111. Boss; 112. First convex portion; 12. Clamping claw; 121. Claw body; 13. Thrust member; 131. Locking hole; 132. Pressing portion; 14. Connecting rod; 15. Stopper; 16. Second elastic member; 17. Sliding block; 171. Hinge hole; 172. Second convex portion; 2. Stopping member; 21. Stopping hole; 22. Magnet; 23. Second through hole;

[0027] 100, secondary pressure plate; 101, base; 102, rotating block; 200, mounting plate. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 As shown, the secondary pressure plate 100 is rotatably arranged on the mounting plate 200 of the primary equipment, and is used to monitor, measure, operate and control the primary equipment and protect it. The secondary pressure plate 100 includes a base 101 and a rotating block 102. The base 101 is fixedly arranged on the mounting plate 200, and the rotating block 102 is rotatably arranged on the base 101 to change the operating state of the secondary pressure plate 100. When the rotating block 102 rotates to be parallel and overlapped with the base 101, the secondary pressure plate 100 is in the input state, and the secondary pressure plate anti-misoperation device does not need to be used at this time. When the rotating block 102 rotates to be perpendicular to the base 101, the secondary pressure plate 100 is in the maintenance state, and the anti-misoperation device needs to be used to lock the secondary pressure plate 100.

[0031] like Figures 2 to 5As shown, a relay protection secondary pressure plate anti-misoperation device provided by the present invention includes a locking member 1 and a limiting member 2, the locking member 1 includes a shell 11, a clamping jaw 12, a first elastic member (not shown in the figure) and a thrust member 13, the shell 11 is provided with a first opening and a second opening at opposite ends thereof, the clamping jaw 12 is slidably arranged in the shell 11, one end of the thrust member 13 is located outside the shell 11, and the other end passes through the first opening and is located in the shell 11 and is connected to the clamping jaw 12, the first elastic member is connected to the clamping jaw 12 to drive the clamping jaw 12 to always be in the expanded state, and the thrust member 13 can push the clamping jaw 12 to move to selectively be in the expanded state and the closed state. When the jaw 12 moves from the second opening to the outside of the shell 11, the jaw 12 is in the expanded state; when the jaw 12 is partially located in the shell 11, the jaw 12 is in the closed state; a locking hole 131 is penetrated on the thrust piece 13; the locking hole 131 is located outside the shell 11 and is selectively provided with a lock (not shown in the figure); the lock can lock the jaw 12 in the closed state; a penetrating limiting hole 21 is provided on the limiting piece 2; the shape of the limiting hole 21 matches the shape of the shell 11; the shell 11 penetrates the limiting hole 21 and is clamped in the limiting hole 21, so that the lock and the jaw 12 are respectively located on opposite sides of the limiting piece 2.

[0032] It can be understood that the housing 11 of the locking member 1 can be clamped in the limiting hole 21 of the limiting member 2, thereby limiting the rotation of the locking member 1. At the same time, one end of the locking member 1 having the clamping claw 12 passes through the limiting hole 21, so that the thrust member 13 and the clamping claw 12 are located on opposite sides of the limiting member 2. When the thrust member 13 pushes the clamping claw 12 to move outside the housing 11, the clamping claw 12 can automatically expand under the elastic force of the first elastic member, so that the secondary pressure plate 100 to be locked is located within the clamping range of the clamping claw 12, and then Then the thrust piece 13 is driven to pull the clamping jaw 12 to move into the housing 11. When the clamping jaw 12 is partially located in the housing 11, the clamping jaw 12 is in a closed state and can clamp the secondary pressure plate 100. At this time, the lock hole 131 of the thrust piece 13 is located outside the housing 11. The thrust piece 13 can be locked using a lock to limit the movement of the thrust piece 13 and the clamping jaw 12, and the clamping jaw 12 is locked in a closed state and keeps clamping the secondary pressure plate 100, thereby limiting the rotation of the secondary pressure plate 100 in the maintenance state. This design is simple to operate and can quickly lock the secondary pressure plate 100 to prevent the secondary pressure plate 100 from changing its operating state due to erroneous rotation during operation and maintenance, thereby ensuring the normal operation of the primary equipment.

[0033] Specifically, in order to ensure the locking effect of the lock, the size of the lock is larger than the size of the limiting hole 21, wherein the lock is a five-protection padlock.

[0034] In this embodiment, a plurality of limiting holes 21 are arranged at intervals on the limiting member 2, and the limiting holes 21 correspond one by one to the secondary pressing plates 100 on the mounting plate 200. The limiting member 2 of this design can cooperate with a plurality of locking members 1 to lock a plurality of secondary pressing plates 100 at the same time, which can reduce the number of limiting members 2 and facilitate the installation and locking of the relay protection secondary pressing plate anti-misoperation device.

[0035] Preferably, the limiting hole 21 is a waist-shaped hole, and the cross section of the housing 11 matches the limiting hole 21. This design can effectively limit the rotation of the locking member 1 and ensure the locking effect of the relay protection secondary pressure plate anti-misoperation device.

[0036] In other embodiments, the limiting hole 21 may also be designed as a square hole, a special-shaped hole, or other shapes that can limit the rotation of the locking member 1 .

[0037] Furthermore, the position-limiting member 2 is provided with a connector detachably connected to the mounting plate 200. In this embodiment, the mounting plate 200 of the primary device is magnetic, and the position-limiting member 2 is provided with a magnet 22, so that the position-limiting member 2 can be adsorbed on the mounting plate 200 by magnetic attraction. This design can quickly fix the position-limiting member 2 on the mounting plate 200 so that the position-limiting hole 21 is aligned one by one with the secondary pressing plate 100, which is conducive to reducing the installation difficulty of the relay protection secondary pressing plate anti-misoperation device and improving the installation efficiency.

[0038] Preferably, the limiting member 2 is further penetrated by a second through hole 23 , which is connected to all the limiting holes 21 . The second through hole 23 can reduce the weight of the limiting member 2 , which is conducive to the limiting member 2 being stably adsorbed on the mounting plate 200 .

[0039] In this embodiment, if Figures 2 to 4 As shown, the clamping jaw 12 includes two claw bodies 121, a slider 17 is slidably arranged in the housing 11, the slider 17 is provided with a hinge hole 171, a rotating shaft (not shown in the figure) is arranged in the hinge hole 171, the rotating shaft is connected to the two claw bodies 121, and the first elastic member is sleeved on the rotating shaft to drive the two claw bodies 121 to always have a tendency to rotate in opposite directions. When the thrust member 13 pushes the claw bodies 121 to slide to the outside of the housing 11, the two claw bodies 121 can rotate in opposite directions under the action of the first elastic member, so that the clamping jaw 12 is in an unfolded state, the secondary pressing plate 100 can be located between the two claw bodies 121, and the two claw bodies 121 can smoothly clamp the two ends of the secondary pressing plate 100 in the width direction.

[0040] Specifically, the first elastic member is a torsion spring.

[0041] Preferably, two clamping jaws 12 are provided, and two hinge holes 171 are provided at intervals on the slider 17. A rotating shaft is provided in each hinge hole 171, and each rotating shaft is sleeved with a first elastic member. Each rotating shaft is connected to a clamping jaw 12, so that the two clamping jaws 12 can respectively clamp the two ends of the secondary pressure plate 100 in the length direction, so that the secondary pressure plate 100 is subjected to uniform force, which is beneficial to improving the clamping effect of the locking member 1.

[0042] Furthermore, the slider 17 is connected to the thrust piece 13 through a connecting rod 14, a stopper 15 is fixedly arranged in the shell 11, the clamping jaw 12 and the thrust piece 13 are respectively located on both sides of the stopper 15, a first through hole is penetrated by the stopper 15, one end of the connecting rod 14 is connected to the slider 17, and the other end is connected to the thrust piece 13 through the first through hole, a second elastic piece 16 is arranged between the stopper 15 and the thrust piece 13, and the second elastic piece 16 always has a tendency to drive the thrust piece 13 to move toward the outside of the shell 11. It can be understood that when external force is applied to overcome the elastic force of the second elastic member 16 and push the thrust member 13 toward the inside of the shell 11, the connecting rod 14 can drive the clamping jaw 12 to move outside the shell 11. After the external force is removed, the thrust member 13 can automatically move toward the outside of the shell 11 under the elastic force of the second elastic member 16, and pull the clamping jaw 12 to move into the shell 11. The clamping jaw 12 can automatically close, that is, the thrust member 13 can automatically reset to allow the clamping jaw 12 to automatically close. This design is conducive to simplifying the locking operation and saving time and effort.

[0043] Specifically, the stopper 15 is provided with two first through holes at intervals along the length direction, and the two first through holes are symmetrically arranged along the center of the stopper 15. Two connecting rods 14 are provided, and the two connecting rods 14 are respectively inserted into the two first through holes to connect the thrust piece 13 and the clamping jaw 12. Each connecting rod 14 is sleeved with a second elastic member 16, and the second elastic member 16 is a spring. The thrust piece 13 is connected to the slider 17 through the two connecting rods 14, and the slider 17 can be evenly stressed, which is conducive to the smooth sliding of the slider 17 and the clamping jaw 12 inside the housing 11. Moreover, each connecting rod 14 is sleeved with a second elastic member 16, which can ensure that the thrust piece 13 is smoothly and automatically reset.

[0044] Furthermore, a boss 111 is circumferentially provided at one end of the first opening of the shell 11, and the boss 111 can abut against the outer wall of the limit member 2. When the clamp 12 clamps the secondary pressure plate 100 and the lock locks the thrust member 13, the clamp 12 always has a tendency to move toward the shell 11 under the action of the second elastic member 16. Under the interaction force, the shell 11 also has a tendency to move toward the clamp 12, so that the boss 111 can press the limit member 2 against the mounting plate 200 to make the limit member 2 more stable.

[0045] Specifically, the shell 11 is provided with a first protrusion 112 protruding toward the center of the second opening, and the slider 17 is provided with a second protrusion 172 protruding therefrom. The second protrusion 172 can abut against the first protrusion 112, and the first protrusion 112 always abuts against the claw body 121. When the slider 17 and the clamping jaw 12 slide back into the shell 11, they are prone to drooping due to the action of gravity, and the slider 17 abuts against the outer wall of the shell 11 and cannot slide smoothly back into the shell 11. The first protrusion 112 of this design can not only limit the slider 17 from moving to the outside of the shell 11, which is conducive to the slider 17 and the clamping jaw 12 sliding smoothly back into the shell 11, but also the first protrusion 112 abuts against the clamping jaw 12, which can make the clamping jaw 12 close during the sliding process.

[0046] Furthermore, the side surface of the first protrusion 112 facing the center of the second opening is inclined from the inside of the housing 11 toward the outside of the housing 11, and when the clamping jaw 12 is unfolded, the inclined side surface of the first protrusion 112 is parallel to the side surface of the adjacent claw body 121 facing the first protrusion 112. The clamping jaw 12 of this design can completely slide to the outside of the housing 11, and smoothly retract into the inside of the housing 11 through the inclined surface of the first protrusion 112, and the clamping jaw 12 will not be stuck on the outer wall of the housing 11 when retracting.

[0047] Specifically, the shell 11 is provided with a third protrusion protruding toward the center of the second opening, and the third protrusion is provided at an end of the shell 11 away from the first protrusion 112. The thrust piece 13 is provided with a fourth protrusion, and the third protrusion and the fourth protrusion can abut against each other to prevent the thrust piece 13 from sliding completely to the outside of the shell 11.

[0048] Furthermore, a pressing portion 132 is provided at one end of the thrust member 13 away from the locking member 1, and the size of the pressing portion 132 is larger than the size of the second opening of the housing 11. This design can push the thrust member 13 through the pressing portion 132, and the size of the pressing portion 132 is larger than the size of the second opening of the housing 11, which can limit the sliding of the thrust member 13, preventing the thrust member 13 from completely sliding into the interior of the housing 11 and abutting against the fourth protrusion and being unable to smoothly slide out of the outside of the housing 11.

[0049] The specific locking method of the relay protection secondary pressure plate anti-misoperation device of the present invention is: before locking the secondary pressure plate 100, the limiting member 2 is first adsorbed on the mounting plate 200 through the magnet 22 so that all the limiting holes 21 are aligned with the secondary pressure plate 100 one by one, and then the shell 11 of the locking member 1 is penetrated and clamped in the limiting hole 21 to limit the rotation of the locking member 1, and at the same time, the end of the shell 11 close to the clamping claw 12 can pass through the limiting hole 21, and then the thrust member is pushed by the pressing portion 132 13, drive the clamping jaw 12 to slide to the outside of the shell 11, so that the clamping jaw 12 can be automatically unfolded, and the secondary pressure plate 100 is located in the clamping range of the clamping jaw 12, and then release the pressing portion 132. The thrust piece 13 can automatically pull the clamping jaw 12 and the slider 17 to slide under the action of the second elastic member 16, so that the clamping jaw 12 retracts and closes to clamp the secondary pressure plate 100. Finally, the thrust piece 13 and the clamping jaw 12 are locked through the lock hole 131 using a lock to limit the sliding of the clamping jaw 12.

[0050] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0052] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0053] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A relay protection secondary pressure plate anti-misoperation device, wherein the secondary pressure plate is rotatably arranged on the mounting plate of the primary equipment, characterized in that: The relay protection secondary pressure plate anti-misoperation device comprises: A locking member, comprising a shell, a clamping jaw, a first elastic member and a thrust member, wherein the first opening and the second opening are respectively arranged at opposite ends of the shell, the clamping jaw is slidably arranged in the shell, one end of the thrust member is located outside the shell, and the other end passes through the first opening and is located in the shell and connected to the clamping jaw, the first elastic member is connected to the clamping jaw to drive the clamping jaw to always be in an extended state, the thrust member can push the clamping jaw to move so as to be selectively in an extended state and a closed state, when the clamping jaw moves from the second opening to the outside of the shell, the clamping jaw is in an extended state, and when the clamping jaw is partially located in the shell, the clamping jaw is in a closed state, a lock hole is penetrated through the thrust member, the lock hole is located outside the shell and is selectively provided with a lock, and the lock can lock the clamping jaw in a closed state; A limiting member, on which a limiting hole is formed, the shape of which matches the shape of the shell, and the shell passes through the limiting hole and is clamped in the limiting hole, so that the lock and the clamp are respectively located on opposite sides of the limiting member; The clamping claw comprises two claw bodies, a slider is slidably arranged in the shell, the slider is provided with a hinge hole, a rotating shaft is arranged in the hinge hole, the rotating shaft is connected to the two claw bodies, and the first elastic member is sleeved on the rotating shaft to drive the two claw bodies to always have a tendency to rotate in opposite directions; The slider is connected to the thrust piece via a connecting rod, a stopper is fixedly provided in the housing, the clamping claw and the thrust piece are respectively located on both sides of the stopper, a first through hole is provided through the stopper, one end of the connecting rod is connected to the slider, and the other end passes through the first through hole and is connected to the thrust piece, a second elastic piece is provided between the stopper and the thrust piece, and the second elastic piece always has a tendency to drive the thrust piece to move toward the outside of the housing; The block is provided with two first through holes spaced apart along the length direction, and the two first through holes are symmetrically arranged along the center of the block. Two connecting rods are provided, and the two connecting rods are respectively inserted into the two first through holes to connect the thrust piece and the clamping claw, and each of the connecting rods is sleeved with the second elastic piece.

2. The device for preventing misoperation of the secondary pressure plate of the relay protection according to claim 1 is characterized in that: The size of the lock is larger than the size of the limiting hole.

3. The device for preventing misoperation of the secondary pressure plate of the relay protection according to claim 1, characterized in that: A plurality of the limiting holes are arranged at intervals on the limiting member, and the limiting holes correspond one-to-one to the secondary pressing plates on the mounting plate.

4. The device for preventing misoperation of the secondary pressure plate of the relay protection according to claim 3 is characterized in that: The limiting member is provided with a connecting member which is detachably connected to the mounting plate.

5. The device for preventing misoperation of the secondary pressure plate of the relay protection according to claim 1, characterized in that: The shell is provided with a first protrusion protruding toward the center of the second opening, and the slider is provided with a second protrusion protruding, and the second protrusion can abut against the first protrusion to limit the slider from moving to the outside of the shell.

6. The device for preventing misoperation of the secondary pressure plate of the relay protection according to claim 5, characterized in that: The side surface of the first protrusion facing the center of the second opening is inclined from the inside of the shell toward the outside of the shell.

7. The device for preventing misoperation of the secondary pressure plate of the relay protection according to any one of claims 1 to 4, characterized in that: A boss is circumferentially arranged at one end of the shell located at the first opening, and the boss can abut against the outer side wall of the limiting member so that the limiting member can be tightly pressed against the mounting plate.

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