Anti-open-circuit interlocking latch system with pre-grounded structure

Abstract

This invention relates to the field of power system technology, and more particularly to an anti-open-circuit interlocking pin system with a pre-grounded structure. The current transformer terminal block has a housing with two conductor interfaces disposed within it. Two movable conductive blocks are respectively disposed on each of the two conductor interfaces. An elastic reset mechanism is provided between the conductive blocks and the housing. The system also includes a conductive plate disposed on the housing. The two conductive blocks share a single conductive plate, maintaining contact and conductivity with the conductive plate. Two push rods are disposed on the left side of the current transformer terminal block. Each push rod has a reset spring mechanism, and an insertion end is provided on its right end. An insertion interface is provided between the conductive portion of the conductive blocks and the conductor interfaces. Thus, during the disassembly, assembly, and maintenance of the current transformer's testing equipment, the two conductor interfaces can be connected via the conductive blocks, short-circuiting the two ends of the current transformer's secondary winding without power outages, ensuring continuous operation of the power system.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a current transformer anti-open-circuit maintenance terminal. Background Technology

[0002] When a current transformer is working, it converts a large primary current into a small secondary current for measurement. The secondary side must not be open-circuited. Because the secondary winding of a current transformer is more numerous than the primary winding, if the secondary side of the current transformer is suddenly open-circuited during circuit operation, a relatively high voltage will be generated at the two disconnected ends, which may damage the equipment or leave a safety hazard. Therefore, the secondary current circuit must not be open-circuited during operation.

[0003] The secondary current loop transmits the low-current signal transformed by the current transformer to measuring instruments, protective relays, and automated control equipment. This signal transmission is typically used for maintaining and monitoring the stability and safety of the system.

[0004] In traditional maintenance methods, when the detection equipment in the secondary current circuit malfunctions or needs maintenance, power outages are usually required for maintenance. This not only affects the continuous operation of the power system, but may also lead to safety hazards and economic losses. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the problems existing in the prior art, the present invention is proposed.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution;

[0008] An anti-open-circuit interlocking latch system with a pre-grounded structure includes a current transformer terminal block. Two wire interfaces are provided on the right side of the current transformer terminal block, and the two wire interfaces are respectively connected to the two ends of the secondary current circuit of the current transformer. A socket is provided on the left side of the current transformer terminal block, and the socket is electrically connected to the wire interfaces.

[0009] The current transformer terminal block has a housing, and two wire interfaces are disposed in the housing;

[0010] The housing is provided with two vertically movable conductive blocks, which are respectively positioned above two wire interfaces. An elastic reset mechanism is provided between the conductive blocks and the housing.

[0011] The conductive movable block has a reset state and a raised state;

[0012] The elastic reset mechanism drives the conductive movable block to reset. When the conductive movable block is in the reset state, the conductive part of the conductive movable block contacts the conductive part of the wire interface to conduct electricity.

[0013] It also includes a conductive sheet disposed on the housing, wherein a grounding terminal is disposed on the conductive sheet;

[0014] Two conductive movable blocks share a single conductive sheet, and the two conductive movable blocks maintain contact with the conductive sheet to conduct electricity.

[0015] When the two conductive movable blocks are in the reset state, the conductive parts on the two conductive movable blocks are simultaneously connected to the conductive sheet, thereby realizing the connection of the two wire interfaces;

[0016] When the conductive movable block is in the raised state, the conductive part on the conductive movable block is disconnected from the conductive part of the wire interface, thereby disconnecting the two wire interfaces;

[0017] Two push rods are provided on the left side of the current transformer terminal block, and the push rods are made of insulating material.

[0018] The push rod is equipped with a reset spring mechanism;

[0019] The push rod is located on the left side of the current transformer terminal block. The right end of the push rod extends into the housing, and the left end of the push rod extends out of the housing. The direction in which the push rod extends out of the housing is consistent with the direction of the socket.

[0020] When the two push rods are pressed, the two push rods retract, and the return spring mechanism is in a stored state.

[0021] The right ends of both push rods are equipped with insertion terminals;

[0022] A plug-in interface matching the insertion end is provided between the conductive part of the conductive movable block and the conductive part of the wire interface.

[0023] The left ends of the two push rods are pressed down, and the two insertion ends are inserted into the plug interface, pushing the conductive movable block to move upward, thereby achieving insulation between the conductive part of the conductive movable block and the conductive part of the wire interface;

[0024] The push rod moves to the left and the insertion end is pulled out of the socket, and the conductive part of the conductive moving block is connected to the conductive part of the wire interface.

[0025] The above design firstly involves setting up conductive movable blocks. When the conductive movable blocks are in the reset state, the conductive parts on both conductive movable blocks are simultaneously connected to the conductive sheet, thereby achieving the connection of the two wire interfaces. In this way, when the current transformer testing equipment is disassembled and repaired, the two wire interfaces can be connected through the conductive movable blocks, and the two ends of the secondary winding of the current transformer can be short-circuited without power outages, ensuring the continuous operation of the power system.

[0026] Secondly, the conductive sheet is equipped with a grounding terminal, so the secondary current circuit of the current transformer can be grounded. Grounding can prevent high voltage caused by incorrect open circuit of the secondary current of the current transformer, and improve the safety of the anti-open circuit interlocking pin system with pre-grounding structure.

[0027] Next, by setting a push rod, when disassembling or installing the current transformer terminals and the detection device terminals, during installation, when the detection device terminals are inserted into the socket on the left side of the current transformer terminals, the insertion end is inserted into the socket, and the insertion end pushes the conductive movable block upward, realizing the insulation between the conductive part of the conductive movable block and the conductive part of the wire interface; when disassembling the detection device terminals, the insertion end is pushed out of the socket by the elastic force of the reset spring mechanism, and the conductive movable block is automatically reset by the elastic reset mechanism. In this way, during the disassembly, assembly, and maintenance of the current transformer detection equipment, the two wire interfaces can be automatically connected through the conductive movable block, and the two ends of the secondary winding of the current transformer can be automatically short-circuited, avoiding the damage to the equipment or the creation of safety hazards caused by worker operation errors that induce extremely high electrodynamics in the secondary winding.

[0028] Preferably, the conductive movable block is provided with a first spring as an elastic reset mechanism. One end of the first spring is connected to the conductive movable block, and the other end is connected to the top of the housing. The insertion end of the push rod is inserted into the insertion interface of the conductive movable block, the conductive movable block moves upward into the raised state, the first spring is compressed, and the conductive part of the conductive movable block remains insulated from the conductive part of the wire interface. The insertion end of the push rod is pulled out from below the conductive movable block, the first spring releases the compression force, the conductive movable block moves downward into the reset state, the conductive part of the conductive movable block contacts the conductive part of the wire interface and conducts electricity, and the two wire interfaces of the current transformer terminal are short-circuited. By setting the first spring as an elastic reset mechanism, the structure is simple and the cost is reduced. It can also quickly and stably reset the conductive movable block to contact the conductive part of the wire interface when the insertion end of the push rod is pulled out, preventing unstable contact from causing a high induced electromotive force in the secondary coil.

[0029] Preferably, the push rod is provided with a second spring as a reset spring mechanism. One end of the second spring is connected to the push rod, and the other end is connected to the left side of the housing. The second spring is used as a reset spring mechanism to ensure the rapid separation of the current transformer terminal and the detection device terminal, and to avoid slow separation when opening, which may lead to unstable contact and induced electromotive force.

[0030] Preferably, the left side of the housing has an opening connecting the inside and outside of the housing, through which the push rod extends into the housing; the push rod has a protruding structure, one end of the second spring is connected to the protruding structure, and the other end is connected to the outer edge of the opening; the left side of the housing also has a support structure for supporting the push rod, the protruding structure is located between the support structure and the opening, and the left end of the push rod extends from the left side of the support structure; the opening and support structure facilitate the back-and-forth sliding of the push rod while maintaining parallelism.

[0031] Furthermore, the upper side of the support structure forms an upward opening with the housing, which facilitates the insertion of the testing device wiring terminals into the socket and the fixing of the testing device wiring terminals and the current transformer wiring terminals by means of the insertion opening structure.

[0032] Preferably, the insertion end of the push rod is provided with an inclined surface that lifts up the conductive movable block; another inclined surface is provided below the conductive movable block as a plug interface, and the other inclined surface of the conductive movable block is arranged opposite to the inclined surface of the push rod insertion end. By providing the inclined surface and the other inclined surface, it is convenient for the insertion end to be inserted into the plug interface to lift up the conductive movable block and keep it insulated from the conductive part of the wire interface.

[0033] Preferably, the socket is provided with a conductive contact piece, which is made of copper. The conductive contact piece is conductively connected to the wire interface. This facilitates the conductive contact between the plug of the detection device terminal and the conductive contact piece, enabling the current transformer terminal and the detection device terminal to be conductively connected, thus ensuring a stable conductive connection.

[0034] Preferably, at least two conductive contact pieces are provided, each having opposing contracting ends, and these contracting ends constitute the conductive contacts of the socket; the conductive contact pieces are elastic. The opposing contracting ends of the conductive contact pieces ensure that the plug can smoothly make contact with the socket after being inserted, preventing poor contact from causing electrical sparks that could damage the plug or socket.

[0035] Preferably, each of the conductive contact pieces is provided with an outward-facing structure facing opposite directions, and the outward-facing structures on at least two conductive contact pieces form an opening structure. The opening structure is located on the left side of the retractable end, and the opening direction of the opening structure is consistent with the orientation of the socket. The opening structure facilitates the insertion of the conductor on the plug, thereby facilitating the plug insertion into the socket and maintaining conductive contact through the retractable end.

[0036] Preferably, an insertion limiting block is also connected inside the housing, and the insertion limiting block is located between the retractable end and the wire interface; to prevent the plug from being inserted too deeply and damaging the conductive contact or the wire interface.

[0037] Preferably, the distance between the insertion limiting block and the contracted end of the conductive contact piece is greater than the stroke length of the push rod; this ensures that when the connection terminal of the detection device is pulled out, the insertion end of the push rod is pulled out from the plug interface first, the conductive movable block falls first, and the conductive part on the conductive movable block contacts and connects with the conductive part of the wire interface first, short-circuiting the secondary circuit of the current transformer. Then the plug is separated from the conductive contact piece, ensuring that the secondary circuit of the current transformer will never be open-circuited, thus ensuring the safety of the anti-open-circuit locking pin system with pre-grounding structure during use.

[0038] Preferably, the conductive contact piece is an elastic conductive contact piece, and the elastic contraction position of the conductive contact piece is the contact position between the plug and the conductive contact piece; the conductive contact piece is elastic, ensuring a stable conductive contact connection between the plug and the conductive contact piece.

[0039] Preferably, the conductor pin is configured as a cylindrical cone shape; this facilitates insertion into the conductive contact piece of the conductor pin and achieves tight contact.

[0040] Preferably, the conductive movable block is provided with a limiting ear, which limits the lowest falling position of the conductive movable block. The limiting ear is located outside the housing. The conductive movable block is also provided with a limiting block, which is located inside the current transformer terminal block. The limiting block is located at the highest rising position of the conductive movable block. This limits the upper and lower limit positions of the conductive movable block, preventing the conductive movable block from falling off or deforming the conductive part of the wire interface, and ensuring the stability of the anti-open circuit interlocking pin system with pre-grounding structure after multiple maintenance.

[0041] Preferably, a rotating plug is provided above the terminal block of the detection device, and the rotating plug is rotatably engaged with the terminal block of the detection device; a slot is provided on the housing; the rotating plug and the slot serve as a locking mechanism; the rotating plug is engaged in the slot to fix the current transformer terminal block and the terminal block of the detection device; the rotating plug is disengaged from the slot, and the push rod pushes the terminal block of the detection device to separate from the current transformer terminal block; the insertion of the rotating plug into the slot facilitates quick and stable locking of the terminal block of the detection device and the terminal block of the current transformer, and the disengagement of the rotating plug from the slot facilitates separation of the terminal block of the detection device and the terminal block of the current transformer, while the locking pin mechanism on the push rod ensures quick disengagement of the terminal block of the detection device. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0043] Figure 1 This is a schematic diagram of the overall structure of the anti-open-circuit locking pin system with a pre-grounded structure according to the present invention;

[0044] Figure 2 This is a schematic diagram of the structure of the push rod falling without being inserted into the conductive movable block according to the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the push rod inserted into the conductive movable block of the present invention. Detailed Implementation

[0046] To make the above-mentioned objectives, features and advantages of the present invention more readily understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0049] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0050] Example 1

[0051] refer to Figures 1-3An anti-open-circuit interlocking pin system with a pre-grounded structure includes a current transformer terminal 1. Two wire interfaces 11 are provided on the right side of the current transformer terminal 1. The two wire interfaces 11 are respectively connected to the two ends of the secondary current circuit of the current transformer. A socket 12 is provided on the left side of the current transformer terminal 1. The socket 12 is electrically connected to the wire interfaces 11.

[0052] The current transformer terminal 1 has a housing 13, and two wire interfaces 11 are disposed in the housing 13;

[0053] The housing 13 is provided with two vertically movable conductive blocks 14, which are respectively positioned above the two wire interfaces 11. An elastic reset mechanism is provided between the conductive blocks 14 and the housing 13.

[0054] The conductive movable block 14 has a reset state and a raised state;

[0055] The elastic reset mechanism drives the conductive movable block 14 to reset. When the conductive movable block 14 is in the reset state, the conductive part of the conductive movable block 14 contacts the conductive part of the wire interface 11 and conducts electricity.

[0056] It also includes a conductive sheet 15 disposed on the housing 13, wherein a grounding terminal is disposed on the conductive sheet 15;

[0057] Two conductive movable blocks 14 share a conductive sheet 15, and the two conductive movable blocks 14 and the conductive sheet 15 maintain contact and conduct electricity.

[0058] When the two conductive movable blocks 14 are in the reset state, the conductive parts on the two conductive movable blocks 14 are also connected to the conductive sheet 15, thereby realizing the connection of the two wire interfaces 11.

[0059] When the conductive movable block 14 is in the raised state, the conductive part on the conductive movable block 14 is disconnected from the conductive part of the wire interface 11, thereby disconnecting the two wire interfaces 11.

[0060] Two push rods 16 are provided on the left side of the current transformer terminal 1. The push rods 16 are made of insulating material.

[0061] A reset spring mechanism is provided on the push rod 16;

[0062] The push rod 16 is located on the left side of the current transformer terminal 1. The right end of the push rod 16 extends into the housing 13, and the left end of the push rod 16 extends out of the housing 13. The direction in which the push rod 16 extends out of the housing 13 is consistent with the direction of the socket 12.

[0063] When the two push rods 16 are pressed, the two push rods 16 retract, and the reset spring mechanism is in a stored state.

[0064] The two push rods 16 are provided with insertion ends 161 on their right ends;

[0065] A plug-in interface matching the insertion end 161 is provided between the conductive part of the conductive movable block 14 and the conductive part of the wire interface 11.

[0066] The left ends of the two push rods 16 are pressed, and the two insertion ends 161 are inserted into the insertion interface, pushing the conductive movable block 14 to move upward, thereby achieving insulation between the conductive part of the conductive movable block 14 and the conductive part of the wire interface 11.

[0067] The push rod 16 moves to the left and the insertion end 161 is pulled out of the insertion interface, and the conductive part of the conductive movable block 14 is connected to the conductive part of the wire interface 11.

[0068] The above design firstly involves setting conductive movable blocks 14. When the conductive movable blocks 14 are in the reset state, the conductive parts on both conductive movable blocks 14 are simultaneously connected to the conductive sheet 15, thereby enabling the two wire interfaces 11 to be connected. In this way, when the current transformer testing equipment is disassembled and repaired, the two wire interfaces 11 can be connected through the conductive movable blocks 14, and the two ends of the secondary winding of the current transformer can be short-circuited without power outage for maintenance, ensuring the continuous operation of the power system.

[0069] Secondly, the conductive sheet 15 is provided with a grounding terminal, so that the secondary current circuit of the current transformer can be grounded. Grounding can prevent high voltage caused by incorrect open circuit of the secondary current of the current transformer, thereby improving the safety of the anti-open circuit locking pin system with pre-grounding structure.

[0070] Next, by setting the push rod 16, when disassembling or installing the current transformer terminal 1 and the detection device terminal, during installation, when the detection device terminal is inserted into the socket 12 on the left side of the current transformer terminal 1, the insertion end 161 is inserted into the socket, and the insertion end 161 pushes the conductive movable block 14 upward, thereby achieving insulation between the conductive part of the conductive movable block 14 and the conductive part of the wire interface 11; when disassembling the detection device terminal, the insertion end 161 is pushed out of the socket by the elastic force of the reset spring mechanism, and the conductive movable block 14 is automatically reset by the elastic reset mechanism. In this way, during the disassembly, assembly and maintenance of the current transformer detection equipment, the two wire interfaces 11 can be automatically connected through the conductive movable block 14, and the two ends of the secondary winding of the current transformer can be automatically short-circuited, avoiding the damage to the equipment or the creation of safety hazards caused by worker operation errors due to the induction of extremely high electrodynamics in the secondary winding.

[0071] A first spring is provided on the conductive movable block 14 as an elastic reset mechanism. One end of the first spring is connected to the conductive movable block 14, and the other end is connected to the top of the housing 13. The insertion end 161 of the push rod 16 is inserted into the insertion interface of the conductive movable block 14, and the conductive movable block 14 moves upward into the raised state. The first spring is compressed, and the conductive part of the conductive movable block 14 remains insulated from the conductive part of the wire interface 11. The insertion end 161 of the push rod 16 is pulled out from below the conductive movable block 14, the first spring releases the compression force, and the conductive movable block 14 moves downward into the reset state. The conductive part of the conductive movable block 14 contacts the conductive part of the wire interface 11 and conducts electricity. The two wire interfaces 11 of the current transformer terminal are short-circuited. By setting the first spring as an elastic reset mechanism, the structure is simple and the cost is reduced. It can also quickly and stably reset the conductive movable block 14 to contact the conductive part of the wire interface 11 when the insertion end 161 of the push rod 16 is pulled out, preventing unstable contact from causing a high induced electromotive force in the secondary coil.

[0072] The push rod 16 is provided with a second spring 17 as a reset spring mechanism. One end of the second spring 17 is connected to the push rod 16, and the other end is connected to the left side of the housing 13. The second spring 17 is used as a reset spring mechanism to ensure the rapid separation of the current transformer terminal 1 and the detection device terminal, so as to avoid slow separation when opening, which would lead to unstable contact and induced electromotive force.

[0073] The left side of the housing 13 has an opening connecting the inside and outside of the housing 13, through which the push rod 16 extends into the housing 13. The push rod 16 has a protruding structure, one end of the second spring 17 is connected to the protruding structure, and the other end is connected to the outer edge of the opening. The left side of the housing 13 also has a support structure 110 for supporting the push rod 16, and the protruding structure is located between the support structure 110 and the opening. The left end of the push rod 16 extends from the left side of the support structure 110. The opening and the support structure 110 facilitate the back-and-forth sliding of the push rod 16 while keeping it parallel.

[0074] The upper side of the support structure 110 forms an upward opening with the housing 13, which facilitates the insertion of the detection device wiring terminal into the socket 12 and then uses the structure of the insertion opening to fix the detection device wiring terminal and the current transformer wiring terminal 1.

[0075] Preferably, the insertion end 161 of the push rod 16 is provided with an inclined surface that lifts up the conductive movable block 14; another inclined surface is provided below the conductive movable block 14 as a plug interface, and the other inclined surface of the conductive movable block 14 is arranged opposite to the inclined surface of the insertion end 161 of the push rod 16. By providing the inclined surface and the other inclined surface, it is convenient for the insertion end 161 to be inserted into the plug interface to lift up the conductive movable block 14 and keep it insulated from the conductive part of the wire interface 11.

[0076] In use, when the current transformer needs to have its detection device removed for maintenance or replacement, the locking mechanism unlocks, and the compression force of the second spring 17 pushes out the push rod 16. The push rod 16 pushes out the detection device's wiring terminal, and the insertion end 161 of the push rod 16 is pulled out of the plug interface. The elastic reset mechanism drives the conductive movable block 14 to reset. In the reset state, the conductive part of the conductive movable block 14 contacts the conductive part of the wire interface 11, completing the conduction. The two conductive movable blocks 14 and the conductive sheet 15 maintain contact and conduction, the secondary winding of the current transformer is short-circuited, and then the wiring terminal 1 of the current transformer and the wiring terminal of the detection device are separated. Maintenance can be carried out without power interruption, ensuring the continuous operation of the power system. The length of the plug inserted into the conductive contact sheet 18 is greater than the length of the insertion end 161 of the push rod 16 extending into the plug interface below the conductive movable block 14, ensuring the safety of the anti-open-circuit interlocking plug system with pre-grounded structure during use.

[0077] When the detection device is reinstalled in the current transformer, the plug is inserted into the conductive contact piece 18. The detection device is connected to the current transformer, and the conductive movable block 14 and the conductive piece 15 maintain short-circuit contact with the conductive part of the wire interface 11. Then, the push rod 16 is pushed and retracted by the terminal of the detection device. The two insertion ends 161 are inserted into the plug interface, pushing the conductive movable block 14 upward to achieve insulation between the conductive part of the conductive movable block 14 and the conductive part of the wire interface 11. Now, the detection device is reconnected and the conductive movable block 14 is disconnected to prevent open circuit effects.

[0078] Example 2

[0079] refer to Figure 1 and Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0080] The socket 12 is provided with a conductive contact piece 18, which is made of copper. The conductive contact piece 18 is conductively connected to the wire interface 11. This facilitates the conductive contact between the plug of the detection device terminal and the conductive contact piece 18, enabling the current transformer terminal 1 to be conductively connected to the detection device terminal, thus facilitating a stable conductive connection.

[0081] The device is provided with at least two conductive contact pieces 18, each having opposing contracting ends. These contracting ends form the conductive contacts of the socket 12. The conductive contact pieces 18 are elastic. The opposing contracting ends of the conductive contact pieces 18 ensure that the plug can smoothly connect to the socket 12 after insertion, preventing poor contact that could cause electrical sparks and damage to the plug or socket 12.

[0082] Each of the conductive contact pieces 18 is provided with an outward-facing structure facing opposite directions. The outward-facing structures on at least two conductive contact pieces 18 form an opening structure. The opening structure is located on the left side of the retractable end, and the opening direction of the opening structure is consistent with the orientation of the socket 12. The opening structure facilitates the insertion of the conductor on the plug, thereby facilitating the insertion of the plug into the socket 12 and maintaining conductive contact through the retractable end.

[0083] An insertion limiting block 19 is also connected inside the housing 13. The insertion limiting block 19 is located between the retractable end and the wire interface 11 to prevent the plug from being inserted too deeply and damaging the conductive contact piece 18 or the wire interface 11.

[0084] The distance between the insertion limiting block 19 and the retracted end of the conductive contact piece 18 is greater than the stroke length of the push rod 16; this ensures that when the connection terminal of the detection device is pulled out, the insertion end 161 of the push rod 16 is pulled out from the plug interface first, the conductive movable block 14 falls first, and the conductive part on the conductive movable block 14 contacts and connects with the conductive part of the wire interface 11 first, short-circuiting the secondary circuit of the current transformer first, and then the plug is separated from the conductive contact piece 18, ensuring that the secondary circuit of the current transformer will never be open-circuited, and ensuring the safety of the anti-open-circuit locking plug system with pre-grounding structure during use.

[0085] The conductive contact piece 18 is an elastic conductive contact piece 18, and the elastic contraction position of the conductive contact piece 18 is the contact position between the plug and the conductive contact piece 18; the conductive contact piece 18 is elastic, ensuring that the plug has a stable conductive contact connection with the conductive contact piece 18.

[0086] The conductor pin is configured as a cylindrical cone shape, which facilitates insertion into the conductive contact piece 18 of the conductor pin and achieves tight contact.

[0087] The conductive movable block 14 is provided with a limiting ear, which limits the lowest falling position of the conductive movable block 14. The limiting ear is located outside the housing 13. The conductive movable block 14 is also provided with a limiting block, which is located inside the current transformer terminal 1. The limiting block is located at the highest rising position of the conductive movable block 14. The upper and lower limit positions of the conductive movable block 14 are limited to prevent the conductive movable block 14 from falling off or deforming the conductive part of the wire interface 11, and to ensure the stability of the anti-open circuit locking pin system with pre-grounding structure after multiple maintenance.

[0088] A rotating plug is provided above the terminal block of the detection device, and the rotating plug is rotatably engaged with the terminal block of the detection device. A slot is provided on the housing 13. The rotating plug and the slot serve as a locking mechanism. The rotating plug is inserted into the slot and the current transformer terminal 1 is fixedly connected to the terminal block of the detection device. When the rotating plug is disengaged from the slot, the push rod 16 pushes the terminal block of the detection device away from the current transformer terminal 1. The insertion of the rotating plug into the slot facilitates a quick and stable locking of the terminal block of the detection device and the current transformer terminal 1. The disengagement of the rotating plug from the slot facilitates the separation of the terminal block of the detection device and the current transformer terminal 1. The locking pin mechanism on the push rod 16 ensures that the terminal block of the detection device is quickly disengaged.

[0089] During use, the conductive movable block 14 slides up and down, preventing it from falling off or deforming the conductive part of the wire interface 11 by using the limiting ears and limiting blocks. The rotating plug inserts into the slot for quick and stable locking of the detection device terminal and the fixed current transformer terminal 1. The rotating plug disengages from the slot for easy separation of the detection device terminal and the fixed current transformer terminal 1. The return spring mechanism on the push rod 16 ensures quick disengagement of the detection device terminal. When the plug is inserted, the conductor in the plug opens the two conductive contact pieces 18 through the opening structure. The contracted ends on the two conductive contact pieces 18 form conductive contacts to maintain conductive contact. The conductive contact pieces 18 rely on elasticity to press against the conductor of the plug, ensuring the stability of the conductive connection and preventing the generation of electric sparks.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An anti-open-circuit interlocking latch system with a pre-grounded structure, comprising a current transformer terminal block, wherein two wire interfaces are provided on the right side of the current transformer terminal block, the two wire interfaces being respectively connected to the two ends of the secondary current circuit of the current transformer, and a socket is provided on the left side of the current transformer terminal block, the socket being electrically connected to the wire interfaces, characterized in that: The current transformer terminal block has a housing, and two wire interfaces are disposed in the housing; The housing is provided with two vertically movable conductive blocks, which are respectively positioned above two wire interfaces. An elastic reset mechanism is provided between the conductive blocks and the housing. The conductive movable block has a reset state and a raised state; The elastic reset mechanism drives the conductive movable block to reset. When the conductive movable block is in the reset state, the conductive part of the conductive movable block contacts the conductive part of the wire interface to conduct electricity. It also includes a conductive sheet disposed on the housing, wherein a grounding terminal is disposed on the conductive sheet; Two conductive movable blocks share a single conductive sheet, and the two conductive movable blocks maintain contact with the conductive sheet to conduct electricity. When the two conductive movable blocks are in the reset state, the conductive parts on the two conductive movable blocks are simultaneously connected to the conductive sheet, thereby realizing the connection of the two wire interfaces; When the conductive movable block is in the raised state, the conductive part on the conductive movable block is disconnected from the conductive part of the wire interface, thereby disconnecting the two wire interfaces; Two push rods are provided on the left side of the current transformer terminal block, and the push rods are made of insulating material. The push rod is equipped with a reset spring mechanism; The push rod is located on the left side of the current transformer terminal block. The right end of the push rod extends into the housing, and the left end of the push rod extends out of the housing. The direction in which the push rod extends out of the housing is consistent with the direction of the socket. When the two push rods are pressed, the two push rods retract, and the return spring mechanism is in a stored state. The right ends of both push rods are equipped with insertion terminals; A plug-in interface matching the insertion end is provided between the conductive part of the conductive movable block and the conductive part of the wire interface. The left ends of the two push rods are pressed down, and the two insertion ends are inserted into the plug interface, pushing the conductive movable block to move upward, thereby achieving insulation between the conductive part of the conductive movable block and the conductive part of the wire interface; The push rod moves to the left and the insertion end is pulled out of the socket, and the conductive part of the conductive moving block is connected to the conductive part of the wire interface.

2. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 1, characterized in that: The conductive movable block is provided with a first spring as an elastic reset mechanism. One end of the first spring is connected to the conductive movable block, and the other end is connected to the top of the housing. The push rod is inserted into the connector of the conductive movable block. The conductive movable block moves upward into the raised state, the first spring is compressed, and the conductive part of the conductive movable block remains insulated from the conductive part of the wire connector. The insertion end of the push rod is pulled away from below the conductive movable block, the first spring releases the compressed elastic force, the conductive movable block moves down into the reset state, the conductive part of the conductive movable block contacts the conductive part of the wire interface and conducts electricity, and the two wire interfaces of the current transformer terminal are short-circuited.

3. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 1, characterized in that: The push rod is equipped with a second spring as a reset spring mechanism. One end of the second spring is connected to the push rod, and the other end is connected to the left side of the housing.

4. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 3, characterized in that: The left side of the housing is provided with a passage connecting the inside and outside of the housing, and the push rod extends into the housing through the passage; The push rod is provided with a protruding structure, and one end of the second spring is connected to the protruding structure, and the other end is connected to the outer edge of the opening; The left side of the housing is also provided with a support structure for supporting the push rod. The protruding structure is located between the support structure and the passage, and the left end of the push rod extends from the left side of the support structure.

5. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 1, characterized in that: The insertion end of the push rod is provided with an inclined surface that lifts up the conductive movable block; Below the conductive movable block, there is another inclined surface serving as an insertion interface, and the other inclined surface of the conductive movable block is positioned opposite to the inclined surface of the push rod insertion end.

6. The anti-open-circuit interlocking latch system with a pre-grounded structure according to claim 1, characterized in that: The socket is provided with a conductive contact piece, which is made of copper. The conductive contact piece is electrically connected to the wire interface.

7. The anti-open-circuit interlocking latch system with a pre-grounded structure according to claim 6, characterized in that: The device is provided with at least two conductive contact pieces, each having opposite contracting ends, and the contracting ends on the at least two conductive contact pieces constitute the conductive contacts of the socket. The conductive contact piece is an elastic conductive contact piece.

8. The anti-open-circuit interlocking latch system with a pre-grounded structure according to claim 7, characterized in that: Each conductive contact piece is provided with an outward-facing structure facing opposite directions. The outward-facing structures on at least two conductive contact pieces form an opening structure. The opening structure is located on the left side of the contracted end, and the opening direction of the opening structure is consistent with the orientation of the insertion port.

9. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 7, characterized in that: An insertion limiting block is also connected inside the housing, and the insertion limiting block is located between the retractable end and the wire interface.

10. The anti-open-circuit interlocking pin system with a pre-grounded structure according to claim 9, characterized in that: The distance between the insertion limiting block and the contracted end of the conductive contact piece is greater than the stroke length of the push rod.

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