CN217607323U - Device for preventing electric shock during work in KYN type switch cabinet - Google Patents

Abstract

The utility model discloses a realize device that work prevents electric shock in KYN type cubical switchboard, including rotating the link that connects the safety hook of the indoor shrouding first bottom that leans on of handcart of cubical switchboard, the fixed shrouding second top that sets up in shrouding first below, the link is located the safety hook below, the safety hook bottom is the inclined plane, the fixed electro-magnet that is provided with on the shrouding first, the electro-magnet is towards the back of safety hook, the safety hook is the magnetism material. The utility model discloses an electro-magnet control couple has realized locking and the unblock to the transmission plate, and then has realized locking and unblock to shrouding A and shrouding second, avoids taking place the operation personnel because carelessness is careless, leads to the open by mistake shrouding and takes place the electric shock accident.

Description

Device for preventing electric shock during work in KYN type switch cabinet

Technical Field

The utility model relates to a cubical switchboard safety facility technical field especially relates to a device that work prevents the electric shock in realizing KYN type cubical switchboard.

Background

When 10kV handcart-type equipment (KYN type) overhauls, the static contact in the cubical switchboard is live equipment, because work is gone on simultaneously for many teams and groups, and the security measure that the operating personnel did can't guarantee that the cubical switchboard door is sealed, therefore the condition that the maintainer touched electrified contact by mistake and aroused the personal accident exists in the maintenance in-process, therefore overhauls the scene and often adopts the way of "people stare people" to prevent the electric shock.

The sealing plate blocks the contact after the handcart of the switch cabinet is pulled out, and an operator can easily touch the transmission plate or open the sealing plate through the guide shaft matched with the handcart, so that the operator can contact the live contact at a short distance to cause an electric shock personal accident. The original position is as follows: the driving plate and the guide shaft do not have a reliable locking function, so that the sealing plate can not be unlocked when the handcart enters the test position and the running position, and the sealing plate can be locked when the handcart leaves the test position and the maintenance position. When the existing structure is used for maintaining a bus and an outgoing line without power failure, after the handcart is pulled out to a maintenance position, an operator can easily open the sealing plate by mistake to cause electric shock accidents due to negligence.

Patent application with publication number CN203932776U discloses a 10kV cubical switchboard protection against electric shock insulating handcart, and patent with publication number CN208272482U discloses a cubical switchboard protection against electric shock insulating handcart, and these two applications have all carried out transformation to the handcart to prevent the electric shock. But after the handcart is pulled out of the handcart room, the handcart room has the risk of electric shock.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a realize device that work prevents the electric shock in KYN type cubical switchboard to with the shrouding shutting when realizing that handcart in the KYN type cubical switchboard reachs the maintenance position, with the shrouding unblock when handcart reachs experimental and running position, thereby avoid taking place the operation personnel because careless carelessness, lead to the mistake to open the shrouding and take place the electric shock accident.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a realize device that work prevents to electrocute in KYN type cubical switchboard, including rotate connect the safety hook of the indoor shrouding first bottom of leaning on of handcart of cubical switchboard, the fixed link that sets up shrouding second top below shrouding first, the link is located the safety hook below, the safety hook bottom is the inclined plane, the fixed electro-magnet that is provided with on the shrouding first, the electro-magnet is towards the back of safety hook, the safety hook is the magnetism material.

Furthermore, a safety mechanism is arranged between a sealing plate A and a sealing plate B in the handcart room, the safety mechanism comprises a connecting rod A, a connecting rod B, a connecting rod C and a connecting rod D which are sequentially hinged and form a diamond shape, the hinged shaft of the connecting rod A and the connecting rod B is an axis A, the hinged shaft of the connecting rod B and the connecting rod C is an axis B, the hinged shaft of the connecting rod C and the connecting rod D is an axis C, and the hinged shaft of the connecting rod D and the connecting rod A is an axis D; the shaft A is fixedly connected with the sealing plate A, and the shaft C is fixedly connected with the sealing plate B; the shaft B and the shaft D are positioned on the same horizontal plane, a slide bar A, a slide bar B, a slide bar C and a slide bar D which are transversely connected in sequence are arranged between the shaft D and the shaft B, one end of the slide bar A is hinged with the shaft D, and the other end of the slide bar A is connected with the slide bar B in a sliding manner; one end of the sliding rod T is hinged with the shaft B, and the other end of the sliding rod T is connected with the sliding rod C in a sliding manner; the lower part of one end, far away from slide bar A, of slide bar B is hinged with the lower part of one end, far away from slide bar D, of slide bar C, and the corresponding surfaces of slide bar B and slide bar C are vertical planes.

Furthermore, a vertical electromagnetic bolt B is arranged below the hinged position of the sliding rod B and the sliding rod C, the electromagnetic bolt B is fixedly connected with the cabinet body, the bolt of the electromagnetic bolt B faces the hinged position, and after the electromagnetic bolt B is electrified, the bolt upwards bounces and upwards jacks the hinged position.

Furthermore, a pin type unlocking unit is arranged below the hinged position of the slide bar B and the slide bar C, the pin type unlocking unit comprises a pin seat and a pin rod vertically connected in the pin seat in a sliding manner, and the upper end of the pin rod faces towards the hinged position.

Furthermore, a blind hole perpendicular to the axis of the bolt rod is formed in the bolt rod and close to the lower end of the bolt rod, a spring is arranged in the blind hole, a steel ball is arranged at the outer end of the spring and tightly pressed on the inner wall of the bolt seat, and a pit used for being matched with the steel ball is formed in the inner wall of the bolt seat and close to the top of the bolt seat.

Furthermore, the lower part of the inner wall of the bolt seat is conical with a downward big head.

Furthermore, a blind hole perpendicular to the axis of the pin seat is formed in the inner wall of the pin seat close to the upper end of the pin seat, a spring is arranged in the blind hole, a steel ball is arranged at the outer end of the spring and is tightly pressed on the outer circle of the pin rod, and a pit used for being matched with the steel ball is formed in the inner wall of the pin rod close to the bottom of the pin rod.

Further, the upper part of the bolt rod is conical with a downward large end.

Further, a travel switch is fixedly arranged beside the guide rail of the handcart room, when a handcart in the switch cabinet is located at a test position, the travel switch is triggered, and the electromagnet is electrified.

Further, a travel switch is fixedly arranged beside the guide rail of the handcart room, when a handcart in the switch cabinet is located at a test position, the travel switch is triggered, and the electromagnetic bolt B is electrified.

The utility model discloses an actively the effect does:

1. the utility model discloses be equipped with electro-magnet, safety hook and link, realized locking and the unblock to the transmission plate through the electro-magnet control couple, and then realized locking and unblock to shrouding first and shrouding second, avoid taking place the operation personnel because carelessness is careless, lead to the open by mistake shrouding and take place the electric shock accident.

2. The utility model discloses be equipped with safety mechanism, safety mechanism still includes slide bar first, slide bar second, slide bar third and slide bar butyl and electromagnetism bolt second or bolt formula unblock unit including articulated connecting rod first, connecting rod second, connecting rod third and connecting rod butyl in proper order, can directly lock or unblock the shrouding, thereby increased the utility model discloses a reliability.

Drawings

Fig. 1 is a schematic structural view of the inside of a handcart room in embodiment 1;

fig. 2 is a schematic view of the interior of the hand truck compartment as seen from the left side of fig. 1;

fig. 3 is a schematic structural view of the inside of the handcart room in embodiments 2 and 3;

FIG. 4 is an enlarged view of a portion II of FIG. 1;

FIG. 5 is a partial enlarged view of part I in FIG. 3 in embodiment 2;

FIG. 6 is an enlarged view of a part I in FIG. 3 in embodiment 3;

fig. 7 is a schematic structural view of a plug-in type unlocking unit in embodiment 3;

fig. 8 is a schematic structural view of a plug-in type unlocking unit in embodiment 4;

in the figure:

1. a cabinet body; 2. an electromagnet; 3. a drive plate; 4. connecting the plate A; 5. a guide rod; 6. a sliding frame A; 7. sealing a plate A; 8. a contact; 9. sealing a plate B; 10. a sliding frame B; 11. connecting the plate B; 12. a guide rail; 13. a travel switch; 14. A safety mechanism; 15. a bracket; 16. a connecting rod A; 17. a convex lug shell; 18. a lug B; 19. a connecting rod B; 20. connecting rod C; 21. a connecting rod T; 22. a first sliding rod; 23. a slide bar B; 24. a slide bar C; 25. a slide bar D; 26. an electromagnetic bolt B; 27. a bolt seat; 28. steel balls; 29. a spring; 30. blind holes; 31. a latch rod; 32. a pit; 33. A handcart room; 34. a handcart; 35. a safety hook; 36. and (5) hanging a ring.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few examples of the present application and not all examples. The following description of the embodiments is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments in the present application, are within the scope of protection of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in the embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present application, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The following embodiments and drawings are to be further explained and illustrated, and it should be noted that the following embodiments are only preferred embodiments, not all embodiments, and should not be construed as limiting the scope of the present invention.

Example 1

As shown in fig. 1 and 2, the front part of the KYN-type switch cabinet is a handcart room 33, the bottom of the handcart room 33 is a guide rail 12, a handcart 34 is arranged in the handcart room 33, and the handcart can move back and forth along the guide rail 12. Two groups of three contacts 8 are arranged at the rear side of the handcart room 33, and six corresponding plugs are arranged at the rear part of the handcart 34. The front sides of the contacts 8 are covered with a sealing plate A7 and a sealing plate B9 which are used for shielding the two groups of contacts 8 to prevent electric shock. The rear portion of handcart room 33 is equipped with and is connected with the bracket 15 of the lateral wall fixed connection of the cabinet body 1 of cubical switchboard, it is connected with driving plate 3 to rotate on the bracket 15. The handcart room 33 is fixedly provided with two symmetrical guide rods 5, and the sliding frames A6 and B10 are respectively in sliding connection with the corresponding guide rods 5. And a sealing plate A7 is connected between the driving plate 3 and the sealing plate A7. Be equipped with even board first 4 between driving plate 3 and the sliding frame first 6, be equipped with even board second 11 between driving plate 3 and the sliding frame second 10.

As shown in fig. 2, the hand truck 34 has three positions when the hand truck compartment 33 moves along the guide rail 12 from right to left, which are respectively for maintenance, test and operation. When the handcart 34 is located at the maintenance position, the aviation plug on the handcart 34 is disconnected with the low-voltage power supply of the switch cabinet, and the corresponding contact 8 is covered by the sealing plate A7 and the sealing plate B9 respectively. When the handcart 34 is located at the test position, the aviation plug on the handcart 34 is connected with the low-voltage power supply of the switch cabinet, and the sealing plate A7 and the sealing plate B9 respectively cover the corresponding contacts 8. When the handcart 34 continues to move leftwards, the handcart 34 pushes the transmission plate 3 to rotate, the transmission plate 3 pulls the connecting plate A4 and the connecting plate B11 when rotating, the sealing plate A7 is made to move upwards, the sealing plate B9 moves downwards, then a plug at the rear part of the handcart 34 is inserted into the corresponding contact 8, and at the moment, the handcart 34 reaches the running position.

As shown in fig. 1, 2 and 4, a device for preventing electric shock during work in realizing KYN type cubical switchboard, including rotate connect in the handcart room of cubical switchboard lean on the safety hook of shrouding first bottom, the fixed link that sets up shrouding second top below shrouding first, the link is located the safety hook below, the safety hook bottom is the inclined plane, the fixed electro-magnet that is provided with on the shrouding first, the electro-magnet is towards the back of safety hook, the safety hook is the magnetism material. The inner side of the safety hook 35 is an arc surface, and the center of the arc surface is concentric with the rotating shaft of the safety hook 35.

When the handcart 34 needs to be overhauled, the handcart 34 is firstly pulled to the overhauling position, the sealing plate A7 moves downwards, and the sealing plate B9 moves upwards to shield the corresponding contacts 8 respectively. Then the aviation plug is pulled off, the electromagnet 2 loses power, and the safety hook 35 droops under the action of gravity. After safety hook 35 bottom contacted link 36, because safety hook 35 bottom is the arc, therefore safety hook 35 can rotate, slide into link 36 under the action of gravity until safety hook 35's hook point to catch link 36, just so locked shrouding A7 and shrouding B9's relative position, therefore can not take place handcart 34 and pull out when overhauing from handcart room 33 and cause the contact accident to expose and take place the electric shock accident because of accident after touching shrouding A7 or shrouding B9 or driving plate 3.

Similarly, after the handcart 34 is pushed to the test position, the aviation plug is inserted, the electromagnet 2 is electrified, the electromagnet 2 attracts the safety hook 35, the safety hook 35 rotates and is separated from the hanging ring 36, then the handcart 34 is continuously pushed, the handcart 34 pushes the connecting plate A4, the sealing plate A7 moves upwards, the sealing plate B9 moves downwards, the corresponding contact 8 is far away, then the plug at the rear part of the handcart 34 is inserted into the corresponding contact 8, and the switch cabinet enters into the running state.

Another control mode of the electromagnet 2 is as follows:

a travel switch 13 is fixedly arranged beside the guide rail 12, and when the handcart 34 moves from the overhauling position to the testing position, the travel switch 13 is triggered to electrify the electromagnet 2 and unlock the connecting plate A4.

Example 2

As shown in fig. 3 and 5, the present embodiment is different from embodiment 1 in that:

be equipped with safety mechanism 14 between indoor spout first 6 of handcart and the spout second 10, safety mechanism 14 is including articulated connecting rod first 16, connecting rod second 19, connecting rod third 20 and the connecting rod butyl 21 that forms the rhombus in proper order, the articulated shaft of connecting rod first 16 and connecting rod second 19 is the A axle, the articulated shaft of connecting rod second 19 and connecting rod third 20 is the B axle, the articulated shaft of connecting rod third 20 and connecting rod butyl 21 is the C axle, the articulated shaft of connecting rod butyl 21 and connecting rod first 16 is the D axle. The shaft A is fixedly connected with a lug boss 17 at the lower part of the sliding frame A6, and the shaft C is fixedly connected with a lug boss 18 at the upper part of the sliding frame B10. The shaft A is fixedly connected with the seal plate A7, and the shaft C is fixedly connected with the seal plate B9. The B axis and the D axis are positioned on the same horizontal plane, and a slide bar A22, a slide bar B23, a slide bar C24 and a slide bar D25 which are transversely connected in sequence are arranged between the D axis and the B axis. The left end of the sliding rod A22 is hinged with the shaft D, and the right end of the sliding rod A is in sliding connection with the sliding rod B23 through a dovetail groove structure. The right end of the sliding rod T25 is hinged with the shaft B, and the left end of the sliding rod T is in sliding connection with the sliding rod C24 through a dovetail groove structure. The lower part of the left end of the slide bar B23 is hinged with the lower part of the right end of the slide bar C24, and the right surface of the slide bar B23 and the left surface of the slide bar C24 are vertical planes.

A vertical electromagnetic bolt B26 is arranged below the hinged position of the sliding rod B23 and the sliding rod C24, the electromagnetic bolt B26 is fixedly connected with the cabinet body 1, the bolt of the electromagnetic bolt B26 faces the hinged position, and after the electromagnetic bolt B26 is electrified, the bolt bounces upwards and jacks up the hinged position.

A travel switch 13 is fixedly arranged beside a guide rail 12 of the handcart room 33, when a handcart 34 in the switch cabinet is located at a test position, the travel switch 13 is triggered, and the electromagnetic bolt B26 is electrified.

When the sealing plate A7 and the sealing plate B9 shield the corresponding contact 8, the sliding rod A22, the sliding rod B23, the sliding rod C24 and the sliding rod D25 are positioned on the same horizontal line under the action of gravity, and the sliding rod B23 and the sliding rod C34 are tightly close to each other at the moment. The hinge position of the slide bar B23 and the slide bar C34 is lower, so that the slide bar B is at a dead point. Even sealing plate A7 and sealing plate B9 are accidentally stressed, the axis A and the axis C cannot be displaced, and therefore the rhombic shape formed by the connecting rod A16, the connecting rod B19, the connecting rod C20 and the connecting rod D21 can be kept unchanged, the positions of the sealing plate A7 and the sealing plate B9 are locked, the contact 8 cannot be accidentally exposed, and electric shock accidents cannot occur.

When the electromagnetic bolt B26 is electrified, the bolt is popped up, the hinged position of the slide rod B23 and the slide rod C24 is jacked up, and therefore the slide rod B is separated from a dead point, and the sealing plate A7 and the sealing plate B9 can move normally.

Example 3

As shown in fig. 6 and 7, the present embodiment is different from embodiment 2 in that:

and replacing the electromagnetic bolt B26 with a bolt type unlocking unit. The bolt type unlocking unit comprises a bolt seat 27 and a bolt rod 31 vertically connected in the bolt seat 27 in a sliding mode, the bolt seat 27 is fixedly connected with the cabinet body 1, and the upper end of the bolt rod 31 faces the hinged position of the slide rod B23 and the slide rod C34.

A blind hole 30 perpendicular to the axis of the bolt rod 31 is formed in the bolt rod 31 close to the lower end, a spring 29 is arranged in the blind hole 30, a steel ball 28 is arranged at the outer end of the spring 29, the steel ball 28 is tightly pressed on the inner wall of the bolt seat 27, and a pit 32 used for being matched with the steel ball 28 is formed in the inner wall of the bolt seat 27 close to the top of the bolt seat.

The handle on the plug rod 31 is pushed upwards, the steel ball 28 enters the pit, the position of the plug rod 31 is locked, the hinged position of the slide rod B23 and the slide rod C24 is jacked upwards at the moment, and therefore the dead point is separated, and the sealing plate A7 and the sealing plate B9 can move normally at the moment.

After the closing plates A7 and B9 are close to each other and shield the corresponding contacts 8, the hinged positions of the sliding rod B23 and the sliding rod C24 strike the latch rod 31 downwards, so that the steel balls 28 are separated from the concave pits 32, the latch rod 31 slides downwards, and the sliding rod B23 and the sliding rod C24 are positioned in the horizontal position and reach dead points.

The lower part of the inner wall of the pin seat 27 is conical with a downward big end. Under the action of the spring 29, the steel balls act on the cylindrical surface, so that the latch rod can be forced downwards, and the action is quicker.

Example 4

As shown in fig. 8, the present embodiment is different from embodiment 3 in that:

the blind hole 30 is arranged at the upper part in the bolt seat 27, the concave pit 32 is arranged at the lower part of the bolt rod 31, the inside of the bolt seat 27 is circular, and the upper part of the bolt rod 31 is conical with the downward big end.

The above-mentioned embodiments are described in detail and specifically to show the preferred embodiments of the present invention, which are only used to illustrate the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the present invention, and the scope of the present invention should not be limited by the present embodiment, i.e. any equivalent changes or modifications made by the spirit of the present invention, for those skilled in the art, within the structure of the present invention, the local modifications inside the system and the changes, transformations, etc. between the subsystems are still within the scope of the present invention. At present, the technical scheme of the application has been subjected to a pilot plant test, namely a small-scale experiment before large-scale mass production of products; after the pilot test is finished, the investigation for the use of the user is carried out in a small range, and the investigation result shows that the satisfaction degree of the user is higher; now, the preparation of products for official production and industrialization have been started.

Claims (10)

1. The device for preventing electric shock during work in a KYN type switch cabinet is characterized by comprising a safety hook (35) which is rotatably connected to the bottom of a sealing plate A (7) which is close to the handcart chamber (33) of the switch cabinet and a hanging ring (36) which is fixedly arranged at the top of a sealing plate B (9) which is arranged below the sealing plate A (7), wherein the hanging ring (36) is positioned below the safety hook (35), the bottom of the safety hook (35) is an inclined plane, an electromagnet (2) is fixedly arranged on the sealing plate A (7), the electromagnet (2) faces to the back of the safety hook (35), and the safety hook (35) is made of a magnetic material; the inner side of the safety hook (35) is an arc surface, and the center of the arc surface is concentric with the rotating shaft of the safety hook (35).

2. The device for preventing electric shock during operation in KYN type switch cabinet according to claim 1, wherein a safety mechanism (14) is arranged between a sealing plate A (7) and a sealing plate B (9) in said handcart chamber (33), said safety mechanism (14) comprises a connecting rod A (16), a connecting rod B (19), a connecting rod C (20) and a connecting rod D (21) which are hinged in sequence and form a diamond shape, the hinged axis of said connecting rod A (16) and said connecting rod B (19) is an axis A, the hinged axis of said connecting rod B (19) and said connecting rod C (20) is an axis B, the hinged axis of said connecting rod C (20) and said connecting rod D (21) and the hinged axis of said connecting rod A (16) are an axis D; the shaft A is fixedly connected with the sealing plate A (7), and the shaft C is fixedly connected with the sealing plate B (9); the B shaft and the D shaft are positioned on the same horizontal plane, a sliding rod A (22), a sliding rod B (23), a sliding rod C (24) and a sliding rod D (25) which are transversely connected in sequence are arranged between the D shaft and the B shaft, one end of the sliding rod A (22) is hinged with the D shaft, and the other end of the sliding rod A (22) is connected with the sliding rod B (23) in a sliding mode; one end of the sliding rod T (25) is hinged with the shaft B, and the other end of the sliding rod T (25) is connected with the sliding rod C (24) in a sliding manner; the lower part of one end of the sliding rod B (23) far away from the sliding rod A (22) is hinged to the lower part of one end of the sliding rod C (24) far away from the sliding rod D (25), and the corresponding surfaces of the sliding rod B (23) and the sliding rod C (24) are vertical planes.

3. The device for preventing electric shock in KYN type switch cabinet according to claim 2, wherein a vertical electromagnetic bolt B (26) is arranged below the hinged position of said sliding rod B (23) and said sliding rod C (24), said electromagnetic bolt B (26) is fixedly connected with said cabinet body (1), a bolt of said electromagnetic bolt B (26) faces said hinged position, and when said electromagnetic bolt B (26) is powered, said bolt bounces upward and jacks up said hinged position.

4. The device for preventing electric shock during KYN type switch cabinet operation according to claim 2, wherein a latch unlocking unit is arranged below the hinge position of the sliding rod B (23) and the sliding rod C (24), the latch unlocking unit comprises a latch seat (27) and a latch rod (31) vertically and slidably connected in the latch seat (27), and the upper end of the latch rod (31) faces the hinge position.

5. The device for preventing electric shock in KYN type switch cabinet according to claim 4, wherein a blind hole (30) perpendicular to the axis of the pin rod (31) is formed in the pin rod (31) near the lower end, a spring (29) is arranged in the blind hole (30), a steel ball (28) is arranged at the outer end of the spring (29), the steel ball (28) is pressed on the inner wall of the pin seat (27), and a pit (32) used for being matched with the steel ball (28) is formed in the inner wall of the pin seat (27) near the top of the pin seat.

6. The device for preventing electric shock in KYN type switch cabinet according to claim 5, wherein said lower portion of inner wall of said pin seat (27) is conical with downward big end.

7. The device for preventing electric shock in KYN type switch cabinet according to claim 4, wherein a blind hole (30) perpendicular to the axis of the pin seat (27) is formed in the inner wall of the blind hole (30) close to the upper end of the pin seat, a spring (29) is arranged in the blind hole (30), a steel ball (28) is arranged at the outer end of the spring (29), the steel ball (28) is pressed on the outer circle of the pin rod (31), and a pit (32) used for being matched with the steel ball (28) is formed in the inner wall of the pin rod (31) close to the bottom of the pin rod.

8. The device for preventing electric shock in KYN type switch cabinet according to claim 7, wherein the upper portion of said latch rod (31) is conical with its big end facing downward.

9. The device for preventing electric shock during KYN type switch cabinet operation according to claim 1, wherein a travel switch (13) is fixedly arranged beside a guide rail (12) of a handcart room (33), when a handcart (34) in the switch cabinet is located at a test position, the travel switch (13) is triggered, and the electromagnet (2) is electrified.

10. The device for preventing electric shock during KYN type switch cabinet operation according to claim 3, wherein a travel switch (13) is fixedly arranged beside a guide rail (12) of the handcart room (33), when a handcart (34) in the switch cabinet is located at a test position, the travel switch (13) is triggered, and the electromagnetic bolt B (26) is electrified.

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