Manually operated locking device and grounding device for rail transport
By using a locking device that engages with the locking part of the hand crank to restrict its rotation, the problem of accidental closing when the grounding device loses power is solved, thus improving safety and convenience.
Patent Information
- Application Number
- CN202423077373.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In the event of a power outage, manual operation of existing rail transit grounding devices can easily lead to accidental closing of the grounding switch, posing a short circuit risk and reducing operational safety.
Design a manual operation locking device that restricts the rotation of the hand crank by engaging the limit wheel with the locking part, ensuring that the opening operation can only be performed in one direction when the power is off; when the power is on, the locking part is moved by the sensing part, allowing bidirectional rotation for opening and closing operations.
It effectively avoids the risk of short circuit caused by accidental closing of the grounding switch when the grounding device loses power, improves operational safety, and facilitates debugging and maintenance operations when power is available, thus enhancing convenience.
Smart Images
Figure CN223612295U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rail transit equipment technical field, especially a kind of manual operation locking device and grounding device for rail transit. BACKGROUND
[0002] In rail transit catenary grounding device, grounding knife switch is mainly used for the grounding operation of catenary.When the power supply of grounding device is lost, the electric operation of knife switch cannot be carried out, at this time, the opening and closing operation is carried out by manually operating crank handle.In prior art, the opening and closing operation by manual operation often relies on artificial logic judgment, which may lead to the risk of misoperation of manual operation, such as inaccurate grounding knife switch closing condition judgment leading to short circuit accident, burning grounding knife switch, etc., reducing the operation safety. SUMMARY
[0003] The utility model embodiment provides a kind of manual operation locking device and grounding device for rail transit, simple structure is easy to operate, it is favorable to avoid the short circuit risk caused by grounding knife switch misoperation when grounding device is lost power, it is favorable to improve operation safety.
[0004] In the first aspect, the utility model embodiment provides a kind of manual operation locking device, locking device and hand-operated crank handle cooperate operation, locking device is applied to the grounding knife switch of rail transit, and locking device includes: lock body, locking module and second sensing part.The one end of hand-operated crank handle is equipped with limit wheel.Locking module is set to the inside of lock body, and locking module includes locking portion and first sensing part, locking portion can be engaged with limit wheel to limit the steering of limit wheel, in the state that locking portion is engaged with limit wheel, limit wheel moves in one direction.Second sensing part is set to the inside of lock body, and second sensing part can drive first sensing part to move, first sensing part can drive locking portion to move, so that locking portion is engaged with limit wheel or separates, to unlock or lock the movement direction of limit wheel.
[0005] The utility model discloses technical scheme is through being provided with the locking module in the locking device, is provided with the limiting wheel in the insertion end of hand operation handle, and the limiting wheel can be engaged with the locking portion and is connected to restrict the steering of limiting wheel, when the grounding device is under the condition of power failure, and hand operation handle can only unidirectionally rotate and disconnect the grounding knife switch, and cannot perform the closing operation, and it is favorable to avoid the short circuit risk caused by the false closing of grounding knife switch when the grounding device is under power failure, and it is favorable to improve the operation safety. Through setting up the second sensing portion and driving the first sensing portion to move, the first sensing portion can drive the locking portion to move, when needing manual operation to debug and test and the grounding device is under the condition of power, the locking portion can be separated from the limiting wheel under the driving of the first sensing portion, the limiting wheel can bidirectionally rotate, and the hand operation handle can bidirectionally rotate and disconnect the grounding knife switch, and the closing operation is convenient in the debugging and overhauling stage operation, satisfies the debugging and overhauling demand, and improves the operation convenience. The utility model discloses technical scheme simple and reliable, and the steering restriction and switching function of limiting wheel are realized through the modular design, and it is convenient for later maintenance.
[0006] According to the foregoing embodiment of the first aspect of the utility model, the locking module further comprises: a mounting portion and a rotating portion, the locking portion and the first sensing portion are located at opposite ends of the mounting portion. The rotating portion is located between the locking portion and the first sensing portion, and the first sensing portion can drive the locking portion to move through the rotating portion.
[0007] According to the foregoing embodiment of the first aspect of the utility model, the locking module further comprises: an elastic member, which is arranged on the rotating portion and can provide an elastic restoring force for the rotating portion.
[0008] According to the foregoing embodiment of the first aspect of the utility model, the locking device comprises a first state, in which the second sensing portion is powered and can drive the first sensing portion to move, so that the locking portion is separated from the limiting wheel, and the limiting wheel moves bidirectionally.
[0009] According to the foregoing embodiment of the first aspect of the utility model, a trigger member is arranged in the lock body, the limiting wheel can contact the trigger member, the trigger member generates a first trigger signal, and the second sensing portion is controlled by the first trigger signal, so that the second sensing portion is powered.
[0010] According to the foregoing embodiment of the first aspect of the utility model, the locking device further comprises a second state, in which the first sensing portion can drive the locking portion to move under the action of an external force, so that the locking portion is separated from the limiting wheel, and the limiting wheel moves bidirectionally.
[0011] According to the foregoing embodiment of the first aspect of the utility model, the lock body comprises a through hole, a connecting member matched with the through hole is arranged in the through hole, and the connecting member can contact the first sensing portion and drive the first sensing portion to move away from the limiting wheel under the action of an external force.
[0012] According to any one of the preceding embodiments of the first aspect of the present application, the first sensing part comprises a magnetic response member, and the second sensing part comprises an electromagnet.
[0013] According to the preceding embodiment of the first aspect of the present application, the locking device further comprises a third state, in which the locking part is in meshing connection with the limiting wheel to restrict the steering of the limiting wheel, and the limiting wheel moves unidirectionally.
[0014] In the second aspect, the present application provides a grounding device for rail transit, which comprises a manual box, a manually operated locking device according to any one of the preceding embodiments of the first aspect of the present application, and a grounding knife switch.
[0015] The manually operated locking device of the present application is provided in the grounding device, the locking module is provided in the locking device, the limiting wheel is provided at the insertion end of the hand-operated handle, the limiting wheel and the locking part can be in meshing connection to restrict the steering of the limiting wheel, and when the grounding device loses power, the hand-operated handle can only rotate unidirectionally to operate the grounding knife switch, and cannot perform closing operation, which is beneficial to avoid the short circuit risk caused by the misoperation of the grounding knife switch when the grounding device loses power, and is beneficial to improve the operation safety.
[0016] The manually operated locking device of the present application is provided in the grounding device, the locking module is provided in the locking device, the limiting wheel is provided at the insertion end of the hand-operated handle, the limiting wheel and the locking part can be in meshing connection to restrict the steering of the limiting wheel, and when the grounding device loses power, the hand-operated handle can only rotate unidirectionally to operate the grounding knife switch, and cannot perform closing operation, which is beneficial to avoid the short circuit risk caused by the misoperation of the grounding knife switch when the grounding device loses power, and is beneficial to improve the operation safety. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structure shown in these drawings without creative labor.
[0018] Figure 1 It is an explosion structure schematic view of an embodiment of the manual operation locking device of the present application.
[0019] Figure 2 It is an internal structure schematic view of a lock body of an embodiment of the manual operation locking device of the present application.
[0020] Figure 3 It is a cross-sectional structure schematic view of an embodiment of the manual operation locking device of the present application when there is electricity.
[0021] Figure 4 It is a cross-sectional structure schematic view of an embodiment of the manual operation locking device of the present application when debugging.
[0022] Figure 5 It is a cross-sectional structure schematic view of an embodiment of the manual operation locking device of the present application when power failure.
[0023] Figure 6 It is a structure schematic view of an embodiment of the grounding device of the present application.
[0024] Figure 7 It is a schematic view of the installation position of the manual operation locking device in an embodiment of the grounding device of the present application.
[0025] Explanation of the reference numerals:
[0026] Manual operation locking device-100, grounding device-200.
[0027] Manual operation handle-110, lock body-120, locking module-130, second sensing part-140, grounding knife switch-210, manual box-220, speed reducer-230, motor-240.
[0028] Limiting wheel-111, triggering piece-121, through hole-122, connecting piece-123, state pin-124, spring-125, locking part-131, first sensing part-132, mounting part-133, rotating part-134, elastic piece-135, manual operation hole-221.
[0029] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0033] The manual operation locking device and the grounding device for rail transit provided by the embodiments of the present application are simple in structure and easy to operate, which is beneficial to avoid the short circuit risk caused by the misoperation of the grounding knife switch when the grounding device loses power, and is beneficial to improve the operation safety.
[0034] As shown in Figures 1-2 As shown in Figure 7 The locking device 100 is cooperated and operated with the hand-operated handle 110, the locking device 100 is applied to the grounding knife switch 210 of rail transit, and the locking device 100 comprises a lock body 120, a locking module 130 and a second sensing part 140. One end of the hand-operated handle 110 is provided with a limiting wheel 111, and the limiting wheel 111 rotates around the hand-operated operation hole 221 of the hand-operated handle 110 as the axis. The locking module 130 is arranged in the inside of the lock body 120, and the locking module 130 comprises a locking part 131 and a first sensing part 132. The locking part 131 can be engaged and connected with the limiting wheel 111 to limit the rotation direction of the limiting wheel 111, as shown in Figure 5As shown, in the state that the locking part 131 is engaged with the limiting wheel 111, the limiting wheel 111 moves in one direction. The second sensing part 140 is arranged in the lock body 120, and the second sensing part 140 can drive the first sensing part 132 to move, and the first sensing part 132 can drive the locking part 131 to move, as shown Figures 3-5 As shown, the locking part 131 is engaged with or separated from the limiting wheel 111 to unlock or lock the movement direction of the limiting wheel 111. In the embodiment of the utility model, preferably, the limiting wheel 111 is a ratchet wheel, and the locking part 131 is a pawl matched with the tooth structure of the ratchet wheel. The first sensing part 132 comprises a magnetic response part, and the second sensing part 140 comprises an electromagnet.
[0035] The utility model technical scheme sets the locking module 130 in the locking device 100, sets the limiting wheel 111 at the insertion end of the hand-operated handle 110, and the limiting wheel 111 can be engaged with the locking part 131 to limit the turning direction of the limiting wheel 111. When the grounding device 200 loses power, the hand-operated handle 110 can only rotate in one direction to operate the grounding knife switch 210, and cannot perform closing operation, which is beneficial to avoid the short circuit risk caused by the misoperation of the grounding knife switch 210 when the grounding device 200 loses power, and is beneficial to improve the operation safety. By setting the second sensing part 140 to drive the first sensing part 132 to move, the first sensing part 132 can drive the locking part 131 to move. When manual operation is needed for debugging and testing and the grounding device 200 has power, the locking part 131 can be separated from the limiting wheel 111 under the driving of the first sensing part 132, the limiting wheel 111 can rotate in two directions, and the hand-operated handle 110 can rotate in two directions to operate the grounding knife switch 210, which is convenient for operation in the debugging and maintenance stage, meets the debugging and maintenance requirements, and improves the operation convenience. The utility model technical scheme has simple and reliable structure, realizes the turning direction limitation and switching function of the limiting wheel 111 through modular design, and is convenient for later maintenance.
[0036] As shown, Figures 1-2 The locking module 130 further comprises a mounting part 133 and a rotating part 134, and the locking part 131 and the first sensing part 132 are located at opposite ends of the mounting part 133. The rotating part 134 is located between the locking part 131 and the first sensing part 132, and the first sensing part 132 can drive the locking part 131 to move through the rotating part 134. The locking module 130 further comprises an elastic member 135, and the elastic member 135 is arranged on the rotating part 134 and can provide elastic restoring force for the rotating part 134. Preferably, the elastic member 135 is a torsion spring. The locking part 131 is in a drooping state under the elastic action of the elastic member 135. When the hand-operated handle 110 is inserted, the limiting wheel 111 and the locking part 131 are in the engaged state, and at this time, the hand-operated handle 110 can only rotate counterclockwise in one direction and cannot rotate clockwise, that is, the hand-operated handle 110 can only realize one-way operation.
[0037] As shown in Figure 3 , the locking device 100 includes a first state, in which the second induction part 140 is powered and can drive the first induction part 132 to move, so that the locking part 131 is separated from the limit wheel 111, and the limit wheel 111 moves bidirectionally. When the grounding device 200 is powered, the hand-operated handle 110 at this time can be operated bidirectionally. Because the grounding device 200 is powered, the grounding device 200 can determine whether the overhead line is powered, and can perform locking logic determination. When closing is allowed, manual operation of closing can be performed, and it is also convenient to operate during debugging and maintenance.
[0038] As shown in Figures 2-3 , the lock body 120 is provided with a trigger 121, and the limit wheel 111 can contact the trigger 121. The trigger 121 generates a first trigger signal, and the second induction part 140 is controlled by the first trigger signal, so that the second induction part 140 is powered. When the grounding device 200 is powered, manual operation is performed at this time, and when the hand-operated handle 110 is inserted into the manual operation hole 221, the trigger 121 is triggered synchronously, so that the trigger 121 generates a displacement remote signal, generates a first trigger signal and sends it to the controller. Preferably, the trigger 121 is a micro switch. After the controller collects the displacement remote signal of the trigger 121, it outputs a conduction signal to turn on the positive and negative electrodes of the second induction part 140. At this time, the second induction part 140 is charged and generates magnetism, the second induction part 140 can adsorb the first induction part 132, and drive the locking part 131 to rotate to the meshing position deviated from the limit wheel 111. At this time, the limit wheel 111 is in a bidirectional rotating state, and the hand-operated handle 110 can be bidirectionally operated.
[0039] Preferably, the trigger 121 is further provided with a state pin 124 and a spring 125. The state pin 124 is connected with the trigger 121, and the spring 125 is arranged outside the state pin 124. The limit wheel 111 contacts the state pin 124 to trigger the trigger 121. After the limit wheel 111 leaves the state pin 124, the state pin 124 is reset under the elastic action of the spring 125.
[0040] Since the second induction part 140 cannot be charged all the time, the controller sets a preset time, and when the energization time of the second induction part 140 exceeds the preset time, the magnetism of the second induction part 140 is eliminated. The locking part 131 is reset to the state of engaging with the limiting wheel 111 under the elastic force of the elastic member 135, and the locking part 131 is reset to the state of engaging with the limiting wheel 111 under the action of the elastic member 135. At this time, the hand-operated handle 110 can only be rotated counterclockwise in one direction, and cannot be rotated clockwise, that is, the hand-operated handle 110 can only realize one-way operation, which is beneficial to protect the second induction part 140. Preferably, the preset time can be set to 30s, and when it exceeds 30s, the controller automatically withdraws the opening of the coil loop of the second induction part 140, and cuts off the coil electric circuit of the second induction part 140.
[0041] As shown in Figure 4 , the locking device 100 further includes a second state, in which the first induction part 132 can drive the locking part 131 to move under the action of an external force, so that the locking part 131 is separated from the limiting wheel 111, and the limiting wheel 111 moves bidirectionally. Figure 2 As shown in , the lock body 120 includes a through hole 122, and the through hole 122 is provided with a connecting member 123 matched with the through hole 122. The connecting member 123 can contact the first induction part 132 under the action of an external force and drive the first induction part 132 to move away from the limiting wheel 111. Preferably, the connecting member 123 is a set screw, and the through hole 122 has a thread matched with the set screw inside.
[0042] When the grounding device 200 loses power, the normal state of the locking device 100 is one-way operation. When it is necessary to install and debug the locking device 100, a wrench is used to screw the connecting member 123 downward, and the connecting member 123 will push the first induction part 132 and drive the locking part 131 to rotate to the disengaged position away from the limiting wheel 111. At this time, the limiting wheel 111 is in a bidirectional rotating state, and the hand-operated handle 110 can realize bidirectional operation. When the debugging is completed, the connecting member 123 is pushed out to the initial position by the wrench, and the locking part 131 is reset and engaged with the limiting wheel 111 under the action of the elastic member 135, that is, the hand-operated handle 110 can only realize one-way operation.
[0043] Figure 5 As shown in , the locking device 100 further includes a third state, in which the locking part 131 is engaged with the limiting wheel 111 to limit the rotation direction of the limiting wheel 111, and the limiting wheel 111 moves unidirectionally.
[0044] Since the opening operation will not cause the overhead line grounding short circuit, but the closing operation must be strictly judged, once the overhead line grounding short circuit occurs, the overhead line short circuit trip or even the grounding knife switch 210 burning will occur. Therefore, when the grounding device 200 loses power, the manual operation in the locking device 100 can only be opened, and the closing operation cannot be performed.
[0045] When the grounding device 200 loses power, the second sensing part 140 is in a non-magnetic state. When the hand-operated handle 110 is inserted into the manual operation hole 221, the locking part 131 is engaged with the limiting wheel 111 under the elastic action of the elastic element 135. Since the locking part 131 and the limiting wheel 111 are engaged, the hand-operated handle 110 will be locked by the locking part 131 in the closing rotation direction, that is, when the grounding device 200 loses power, the hand-operated handle 110 cannot manually close the grounding knife switch 210, and can only be opened.
[0046] As shown in Figures 6-7 The utility model embodiment further provides a grounding device 200 for rail transit. The grounding device 200 comprises a manual box 220, a manual operation locking device 100 according to any one of the preceding embodiments of the utility model and a grounding knife switch 210, the hand-operated handle 110 can be inserted into the manual box 220 inside through the manual operation hole 221, the locking device 100 is arranged above the manual box 220, and the manual box 220 is arranged above the grounding knife switch 210. The locking device 100 in the manual box 220 is linked with the operating shaft of the grounding knife switch 210 through the hand-operated handle 110, and the operating shaft is responsible for transmitting the opening and closing action to the main body of the grounding knife switch 210.
[0047] As shown in Figures 1-2 The utility model embodiment provides a manual operation locking device 100, which is matched with the hand-operated handle 110 and applied to the grounding knife switch 210 of rail transit. The locking device 100 comprises a lock body 120, a locking module 130 and a second sensing part 140. One end of the hand-operated handle 110 is provided with a limiting wheel 111. The locking module 130 is arranged in the lock body 120 and comprises a locking part 131 and a first sensing part 132. The locking part 131 can be engaged with the limiting wheel 111 to limit the rotation direction of the limiting wheel 111. In the engaged state of the locking part 131 and the limiting wheel 111, the limiting wheel 111 moves unidirectionally. The second sensing part 140 is arranged in the lock body 120 and can drive the first sensing part 132 to move. The first sensing part 132 can drive the locking part 131 to move, so that the locking part 131 is engaged with or separated from the limiting wheel 111 to unlock or lock the movement direction of the limiting wheel 111.
[0048] AsFigures 6-7 As shown, the grounding device 200 further comprises a reduction gearbox 230 and a motor 240, one end of the reduction gearbox 230 is connected with the grounding knife switch 210, the other end is connected with the motor 240, and the motor 240 can control the electric opening and closing operation of the grounding knife switch 210.
[0049] The utility model discloses technical scheme is through being provided with manual operation locking device 100 in grounding device 200, is provided with locking module 130 in locking device 100, is provided with limit wheel 111 at the insertion end of hand-operated handle 110, and limit wheel 111 can meshed connection with locking portion 131 to restrict the steering of limit wheel 111, when the grounding device 200 is in the case of power failure, hand-operated handle 110 can only unidirectionally rotate and open the grounding knife switch 210, and cannot perform the closing operation, which is helpful to avoid the short circuit risk caused by the misoperation of the grounding knife switch 210 when the grounding device 200 is in power failure, and is helpful to improve the operation safety. By setting the second sensing portion 140 to drive the first sensing portion 132 to move, the first sensing portion 132 can drive the locking portion 131 to move, when manual operation is needed for debugging test and the grounding device 200 is powered, the locking portion 131 can be separated from the limit wheel 111 under the driving of the first sensing portion 132, the limit wheel 111 can rotate bidirectionally, and the hand-operated handle 110 can rotate bidirectionally to open and close the grounding knife switch 210, which is convenient for operation in the debugging and maintenance stage, meets the debugging and maintenance requirements, and improves the operation convenience. The utility model discloses technical scheme is simple and reliable, and the steering restriction and switching function of limit wheel 111 are realized through modular design, which is convenient for later maintenance.
[0050] The utility model discloses technical scheme's manual operation locking device 100 is in the case of power failure of grounding device 200, because limit wheel 111 and locking portion 131 are mutually meshed connection, limit wheel 111 can only unidirectionally rotate, so that hand-operated handle 110 can only unidirectionally rotate and open the grounding knife switch 210, and cannot perform the closing operation, which is helpful to avoid the short circuit risk caused by the misoperation of the grounding knife switch 210 when the grounding device 200 is in power failure, and is helpful to improve the operation safety. When the grounding device 200 is powered or needs maintenance without power, the first sensing portion 132 can drive the locking portion 131 to move so that the locking portion 131 is separated from the limit wheel 111, the limit wheel 111 can change from unidirectional rotation to bidirectional rotation, and the hand-operated handle 110 can open and close the grounding knife switch 210, which improves the operation convenience.
[0051] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made under the inventive concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.
Claims
1. A manually operated closure device, the closure device being adapted to operate in conjunction with a hand-operated handle, characterised in that, The locking device is applied to a grounding knife switch of rail transit, one end of a hand-operated handle is provided with a limiting wheel, and the locking device comprises: a lock body; a locking module arranged in the lock body, the locking module comprising a locking part and a first sensing part, the locking part being capable of meshing connection with the limiting wheel to restrict the turning of the limiting wheel, the limiting wheel moving unidirectionally in the state of meshing connection of the locking part and the limiting wheel; and a second sensing part arranged in the lock body, the second sensing part being capable of driving the first sensing part to move, the first sensing part being capable of driving the locking part to move, so that the locking part is meshed with or separated from the limiting wheel to unlock or lock the movement direction of the limiting wheel.
2. The closure of claim 1, wherein The locking module further comprises: a mounting part, the locking part and the first sensing part being respectively located at opposite ends of the mounting part; and a rotating part located between the locking part and the first sensing part, the first sensing part being capable of driving the locking part to move through the rotating part.
3. The closure of claim 2, wherein The locking module further comprises: a resilient member arranged at the rotating part and capable of providing the rotating part with elastic restoring force.
4. The closure of claim 2, wherein The locking device comprises a first state, in the first state, the second sensing part is energized and capable of driving the first sensing part to move, so that the locking part is separated from the limiting wheel, and the limiting wheel moves bidirectionally.
5. The closure of claim 4, wherein The lock body is provided with a trigger member, the limiting wheel is capable of contacting the trigger member, the trigger member generates a first trigger signal, and the second sensing part is controlled by the first trigger signal, so that the second sensing part is energized.
6. The closure of claim 4, wherein The locking device further comprises a second state, in the second state, the first sensing part is capable of driving the locking part to move under the action of external force, so that the locking part is separated from the limiting wheel, and the limiting wheel moves bidirectionally.
7. The closure of claim 6, wherein The lock body comprises a through hole, the through hole is provided with a connecting member matched with the through hole, the connecting member is capable of contacting the first sensing part and driving the first sensing part to move away from the limiting wheel under the action of external force.
8. A closure as claimed in any one of claims 2 to 7, wherein, The first sensing part comprises a magnetic response member, and the second sensing part comprises an electromagnet.
9. The closure of claim 6, wherein The locking device further comprises a third state, in the third state, the locking part is meshed with the limiting wheel to restrict the turning of the limiting wheel, and the limiting wheel moves unidirectionally.
10. A grounding device for rail transport, characterized in that, The grounding device comprises: a hand-operated box, the hand-operated box being provided with a hand-operated hole, and the hand-operated handle being capable of being inserted into the hand-operated box through the hand-operated hole; the hand-operated locking device according to any one of claims 1 to 9, the locking device being arranged above the hand-operated box; and a grounding knife switch, the hand-operated box being arranged above the grounding knife switch.