Current transformer open circuit prevention maintenance terminal with force storage push-off mechanism

Abstract

The invention relates to the technical field of power systems, in particular to a current transformer open circuit prevention overhaul terminal with a force storage push-off mechanism, the current transformer wiring terminal is provided with a shell, two wire interfaces are arranged on the shell, two movable conductive keys are respectively arranged on the two wire interfaces, and the two movable conductive keys are arranged on the shell. An elastic reset mechanism is arranged between the conductive key and the shell, and the conductive sheet is arranged on the shell; at least two conductive keys share one conductive sheet, and the two conductive keys and the conductive sheet are kept in contact and conductive; an elastic push-off mechanism is arranged on the left side of the current transformer wiring terminal; the elastic push-off mechanism comprises at least two push rods, and the at least two push rods are respectively provided with a reset spring mechanism; therefore, when the detection equipment of the current transformer is disassembled, assembled and overhauled, the two wire interfaces can be conducted through the conductive keys, the two ends of the secondary winding of the current transformer are short-circuited, power failure is not needed for overhauling, and continuous operation of a power system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and in particular to an open circuit prevention maintenance terminal for a current transformer. Background Art

[0002] When the current transformer is working, it converts the large current on the primary side into a small current on the secondary side for measurement. The secondary side cannot be open. Since the current transformer has more secondary windings and fewer primary windings, if the secondary side of the current transformer is suddenly opened during circuit operation, a relatively high voltage will be generated at both ends of the disconnection. This high voltage will cause the current transformer winding turns to break down and cause a short circuit. More importantly, it will hurt the operating personnel. Therefore, the secondary current loop is prohibited from being open during operation.

[0003] The secondary current loop transmits the low current signal transformed by the current transformer to the measuring instrument, protection relay and automation control equipment. This signal transmission is usually for the purpose of maintaining and monitoring the stability and safety of the system.

[0004] Under the traditional maintenance method, when the detection equipment in the secondary current circuit fails or needs maintenance, it is usually necessary to shut down the power for maintenance, which not only affects the continuous operation of the power system, but also may cause safety hazards and economic losses. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

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

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism comprises a current transformer terminal and a detection device terminal; the current transformer terminal is a terminal for connecting a current transformer and has two wire interfaces; a socket is conductively connected on the left side of the wire interface; the detection device terminal has two conductive plugs; the two conductive plugs and the two sockets adopt a matching plug-in structure; the current transformer terminal and the detection device terminal are detachably connected; the detection device terminal is a terminal for outputting current to the detection device.

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

[0010] Two movable conductive keys are respectively arranged on the two wire interfaces;

[0011] An elastic reset mechanism is provided between the conductive key and the housing;

[0012] The conductive key has a reset state and a raised state;

[0013] The elastic reset mechanism drives the conductive key to reset. When the conductive key is in the reset state, the conductive part of the conductive key contacts the conductive part of the wire interface to complete the conduction.

[0014] Also includes a conductive sheet disposed on the housing;

[0015] At least two conductive bonds share a conductive sheet, and the two conductive bonds maintain contact with the conductive sheet for electrical conduction;

[0016] When the two conductive keys are in a reset state, the conductive parts on the two conductive keys are also connected to the conductive sheet at the same time, thereby achieving connection between the two wire interfaces;

[0017] When the conductive key is in the raised state, the conductive part on the conductive key is disconnected from the conductive part of the wire interface, thereby realizing the disconnection of the two wire interfaces;

[0018] An elastic push-off mechanism is provided on the left side of the current transformer terminal;

[0019] The elastic push-off mechanism comprises at least two push rods, and at least two push rods are respectively provided with a return spring mechanism;

[0020] After the current transformer terminal and the detection device terminal are plugged in, at least two push rods are squeezed, at least two push rods are retracted, and the reset spring mechanism is in a power storage state;

[0021] A locking mechanism is also provided between the current transformer terminal and the detection device terminal;

[0022] At least two push rods are provided with insertion ends at their right ends;

[0023] An insertion interface matching the insertion end is provided between the conductive part of the conductive key and the conductive part of the wire interface;

[0024] At least two insertion ends are inserted into the insertion interface to push the conductive key upward to achieve insulation between the conductive part of the conductive key and the conductive part of the wire interface;

[0025] After the locking mechanism between the current transformer terminal and the detection device terminal is unlocked, the current transformer terminal and the detection device terminal are separated by the reset thrust of the reset spring mechanism;

[0026] During the separation process of the current transformer terminals and the detection device terminals:

[0027] First, the push rod moves to the left and the insertion end is pulled out from the plug interface, and the conductive part of the conductive key is connected with the conductive part of the wire interface;

[0028] Then, the two conductive plugs are separated from the two sockets.

[0029] The above design first sets a conductive key. When the conductive key is in the reset state, the conductive parts on the two conductive keys are also connected to the conductive sheet at the same time, thereby realizing the connection between the two wire interfaces. In this way, when the detection equipment of the current transformer is disassembled, assembled and repaired, the two wire interfaces can be connected through the conductive key, and the two ends of the secondary winding of the current transformer can be short-circuited. There is no need to shut down the power for maintenance, thereby ensuring the continuous operation of the power system.

[0030] Secondly, by setting a push rod, when the current transformer terminal and the detection device terminal are disassembled or installed, the insertion end is inserted into the plug interface during installation to push the conductive key upward to achieve insulation between the conductive part of the conductive key and the conductive part of the wire interface; when disassembling, the insertion end is pushed out of the plug interface by the elastic force of the elastic push-off mechanism, and the conductive key is automatically reset by the elastic reset mechanism. In this way, when the current transformer detection equipment is disassembled, assembled and repaired, the two wire interfaces can be automatically connected through the conductive key, and the two ends of the secondary winding of the current transformer are automatically short-circuited, thereby avoiding workers' operating errors that cause the secondary winding to induce extremely high electric currents that damage equipment or leave safety hazards.

[0031] Preferably, a first spring is provided on the conductive key as an elastic reset mechanism, one end of the first spring is connected to the conductive key, and the other end is connected to the top of the shell; the insertion end of the push rod is inserted into the plug interface of the conductive key, the conductive key moves up to a raised state, the first spring is compressed, and the conductive part of the conductive key is insulated from the conductive part of the wire interface; the insertion end of the push rod is withdrawn from under the conductive key, the first spring releases the compressed elastic force, the conductive key moves down to a reset state, the conductive part of the conductive key contacts and conducts electricity with the conductive part of the wire interface, and the two wire interfaces of the terminal block of the current transformer are short-circuited; by arranging the first spring as an elastic reset mechanism, the structure is simple and the cost is reduced, and the conductive key can be quickly and stably reset to a state where it contacts and conducts electricity with the conductive part of the wire interface when the insertion end of the push rod is pulled out, thereby preventing the secondary coil from inducing a very high induced electromotive force due to unstable contact.

[0032] Preferably, a second spring is provided on the push rod 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 shell; 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. Slow separation during opening leads to unstable contact and the generation of induced electromotive force.

[0033] Preferably, the insertion end of the push rod is provided with an inclined surface for lifting the conductive key; another inclined surface is provided below the conductive key as an insertion interface, and the other inclined surface of the conductive key is arranged opposite to the inclined surface of the insertion end of the push rod. By providing the inclined surface and the other inclined surface, it is convenient for the insertion end to be inserted into the insertion interface to lift the conductive key and keep the conductive part of the wire interface insulated.

[0034] Preferably, two conductive pins are provided in the detection device terminal, and the two conductive pins are respectively provided on the right sides of the two conductive plugs; two conductive contact pieces are provided in the current transformer terminal, and the two conductive contact pieces are provided in the two wire interfaces; the conductive plug is inserted into the socket, and the conductive pin contacts and the conductive contact piece for conductivity, so that the current transformer terminal is connected to the detection device terminal; through the conductive contact between the conductive pin and the conductive contact piece, the current transformer terminal is conductively connected to the detection device terminal, which facilitates their stable conductive connection.

[0035] Preferably, the length of the conductive pin inserted into the conductive contact sheet is greater than the length of the push rod insertion end extending into the plug-in interface below the conductive key; ensure that the conductive key falls first, the conductive part on the conductive key contacts and connects with the conductive part of the wire interface first, and then the conductive pin is separated from the conductive contact sheet, to ensure that the secondary circuit of the current transformer will never be open, and to ensure the safety of the current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism when in use.

[0036] Preferably, the conductive contact piece is an elastic conductive contact piece, and the elastically contracted position of the conductive contact piece is the contact position between the conductive pin and the conductive contact piece; the conductive contact piece is elastic, ensuring that the conductive pin is stably connected to the conductive contact piece in a conductive touch manner.

[0037] Preferably, the conductor pin is configured as a cylindrical cone, which facilitates insertion into the conductive contact sheet of the conductor pin and achieves close contact.

[0038] Preferably, a limit ear is provided on the conductive key, the limit ear limits the lowest falling position of the conductive key, and the limit ear is located outside the shell; a limit block is also provided on the conductive key, the limit block is located inside the current transformer terminal, and the limit block is at the highest rising position of the conductive key; the upper and lower limit positions of the conductive key are limited to prevent the conductive key from falling off or the conductive part of the wire interface from being compressed and deformed, thereby ensuring the working stability of the current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism after multiple maintenance.

[0039] Preferably, a rotating plug block is provided above the detection device wiring terminal, and the rotating plug block and the detection device wiring terminal can be rotatably matched;

[0040] The housing is provided with a card slot;

[0041] The rotating plug and the card slot serve as a locking mechanism;

[0042] The rotating plug is inserted into the slot, and the current transformer terminal is fixedly connected to the detection device terminal;

[0043] The rotating plug block disengages from the slot, and the push rod pushes the detection device terminal away from the solid current transformer terminal; the rotating plug block is inserted into the slot to facilitate the rapid and stable locking of the detection device terminal and the solid current transformer terminal, and the rotating plug block disengages from the slot to facilitate the separation of the detection device terminal and the solid current transformer terminal. The reset spring mechanism on the push rod ensures that the detection device terminal is quickly disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0045] Figure 1 It is a schematic diagram of the overall structure of the current transformer open circuit prevention maintenance terminal with a force storage push-off mechanism of the present invention;

[0046] Figure 2 It is a schematic diagram of the structure of separation of the current transformer wiring terminal and the detection device wiring terminal of the present invention;

[0047] Figure 3 It is a structural schematic diagram of the current transformer wiring terminal and the detection device wiring terminal being plugged together in the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0051] Furthermore, 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 present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0052] Example 1

[0053] refer to Figure 1-Figure 3 , a current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism, including a current transformer terminal 1 and a detection device terminal 2; the current transformer terminal 1 is a terminal for connecting a current transformer, and has two wire interfaces 11; a socket 12 is conductively connected to the left side of the wire interface 11; the detection device terminal 2 has two conductive plugs 21; the two conductive plugs 21 and the two sockets 12 adopt a matching plug-in structure; the current transformer terminal 1 and the detection device terminal 2 are detachably connected; the detection device terminal 2 is a terminal for outputting current to the detection device.

[0054] The current transformer terminal block 1 has a housing 13, and two wire interfaces 11 are arranged on the housing 13;

[0055] Two movable conductive keys 14 are respectively arranged on the two wire interfaces 11;

[0056] An elastic reset mechanism is provided between the conductive key 14 and the housing 13;

[0057] The conductive key 14 has a reset state and a raised state;

[0058] The elastic reset mechanism drives the conductive key 14 to reset. When the conductive key 14 is in the reset state, the conductive part of the conductive key 14 contacts the conductive part of the wire interface 11 to complete the conduction.

[0059] It also includes a conductive sheet 15 disposed on the housing 13;

[0060] At least two conductive keys 14 share a conductive sheet 15, and the two conductive keys 14 maintain contact and conduction with the conductive sheet 15;

[0061] When the two conductive keys 14 are in the reset state, the conductive parts on the two conductive keys 14 are also connected to the conductive sheet 15, thereby achieving the connection between the two wire interfaces 11;

[0062] When the conductive key 14 is in the raised state, the conductive part on the conductive key 14 is disconnected from the conductive part of the wire interface 11, thereby realizing the disconnection of the two wire interfaces 11;

[0063] An elastic push-off mechanism is provided on the left side of the current transformer terminal 1;

[0064] The elastic push-off mechanism comprises at least two push rods 16, and at least two push rods 16 are respectively provided with a return spring mechanism;

[0065] After the current transformer terminal 1 and the detection device terminal 2 are plugged in, at least two push rods 16 are squeezed, at least two push rods 16 are retracted, and the reset spring mechanism is in a power storage state;

[0066] A locking mechanism 22 is also provided between the current transformer terminal 1 and the detection device terminal 2;

[0067] At least two push rods 16 are provided with insertion ends 161 at their right ends;

[0068] An insertion port 141 matching with the insertion end 161 is provided between the conductive portion of the conductive key 14 and the conductive portion of the wire interface 11;

[0069] At least two insertion ends 161 are inserted into the insertion port 141 to push the conductive key 14 upward, thereby achieving insulation between the conductive part of the conductive key 14 and the conductive part of the wire port 11;

[0070] After the locking mechanism 22 between the current transformer terminal 1 and the detection device terminal 2 is unlocked, the current transformer terminal 1 and the detection device terminal 2 are separated by the reset thrust of the reset spring mechanism;

[0071] During the separation process of the current transformer terminal 1 and the detection device terminal 2:

[0072] First, the push rod 16 moves leftward and the insertion end 161 is pulled out from the insertion port 141, and the conductive part of the conductive key 14 is connected with the conductive part of the wire port 11;

[0073] Then, the two conductive plugs 21 are separated from the two sockets 12 .

[0074] The above design first sets a conductive key 14. When the conductive key 14 is in the reset state, the conductive parts on the two conductive keys 14 are also connected to the conductive sheet 15, thereby realizing the connection between the two wire interfaces 11. In this way, when the detection equipment of the current transformer is disassembled, assembled, and repaired, the two wire interfaces 11 can be connected through the conductive key 14, and the two ends of the secondary winding of the current transformer can be short-circuited. There is no need to shut down the power for maintenance, thereby ensuring the continuous operation of the power system.

[0075] Secondly, by setting the push rod 16, when the current transformer terminal 1 and the detection device terminal 2 are disassembled or installed, the insertion end 161 is inserted into the plug interface 141 during installation, pushing the conductive key 14 upward to achieve insulation between the conductive part of the conductive key 14 and the conductive part of the wire interface 11; when disassembling, the insertion end 161 is pushed out of the plug interface 141 by the elastic force of the elastic push-off mechanism, and the conductive key 14 is automatically reset by the elastic reset mechanism. In this way, when the current transformer detection equipment is disassembled, assembled and repaired, the two wire interfaces 11 can be automatically connected through the conductive key 14, and the two ends of the secondary winding of the current transformer are automatically short-circuited, thereby avoiding the secondary winding from inducing extremely high electric damage to the equipment or leaving safety hazards due to workers' operating errors.

[0076] A first spring is provided on the conductive key 14 as an elastic reset mechanism, one end of the first spring is connected to the conductive key 14, and the other end is connected to the top of the shell 13; the insertion end 161 of the push rod 16 is inserted into the plug interface 141 of the conductive key 14, the conductive key 14 moves up to enter the raised state, the first spring is compressed, and the conductive part of the conductive key 14 is insulated from the conductive part of the wire interface 11; the insertion end 161 of the push rod 16 is pulled out from under the conductive key 14, the first spring releases the compressed elastic force, the conductive key 14 moves down to enter the reset state, the conductive part of the conductive key 14 contacts the conductive part of the wire interface 11 for conduction, and the two wire interfaces 11 of the terminal block of the current transformer are short-circuited; by providing the first spring as the elastic reset mechanism, the structure is simple and the cost is reduced, and the conductive key 14 can be quickly and stably reset to the conductive part of the wire interface 11 for conduction when the insertion end 161 of the push rod 16 is pulled out, so as to prevent the secondary coil from inducing a high induced electromotive force due to unstable contact.

[0077] A second spring 17 is provided on the push rod 16 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 2. Slow separation during opening leads to unstable contact and the generation of induced electromotive force.

[0078] The insertion end 161 of the push rod 16 is provided with an inclined surface for lifting the conductive key 14; another inclined surface is provided below the conductive key 14 as an insertion port 141, and the other inclined surface of the conductive key 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 insertion port 141 to lift the conductive key 14 and keep it insulated from the conductive part of the wire interface 11.

[0079] Two conductive pins 23 are provided in the detection device terminal 2, and the two conductive pins 23 are respectively provided on the right side of the two conductive plugs 21; two conductive contact pieces 18 are provided in the current transformer terminal 1, and the two conductive contact pieces 18 are provided in the two wire interfaces 11; the conductive plug 21 is inserted into the socket 12, and the conductive pins 23 contact and conduct electricity with the conductive contact pieces 18, so that the current transformer terminal 1 is connected with the detection device terminal 2; through the conductive contact between the conductive pins 23 and the conductive contact pieces 18, the current transformer terminal 1 is conductively connected with the detection device terminal 2, which facilitates their stable conductive connection.

[0080] The length of the conductive pin 23 inserted into the conductive contact piece 18 is greater than the length of the insertion end 161 of the push rod 16 extending into the plug-in port 141 below the conductive key 14; ensure that the conductive key 14 falls first, the conductive part on the conductive key 14 is first contacted and connected with the conductive part of the wire interface 11, and then the conductive pin 23 is separated from the conductive contact piece 18, to ensure that the secondary circuit of the current transformer will never be open-circuited, and to ensure the safety of the current transformer anti-open-circuit maintenance terminal with a force storage push-off mechanism when in use.

[0081] The conductive contact piece 18 is an elastic conductive contact piece 18 , and the elastically contracted position of the conductive contact piece 18 is the contact position between the conductive pin 23 and the conductive contact piece 18 ; the conductive contact piece 18 is elastic, ensuring that the conductive pin 23 is stably connected to the conductive contact piece 18 in a conductive touch manner.

[0082] The conductor pin is configured to be cylindrically tapered, which facilitates insertion into the conductive contact piece 18 of the conductor pin and achieves close contact.

[0083] During use, when the current transformer needs to remove the detection device for inspection or replacement, the locking mechanism 22 is unlocked, and the compression elastic force of the second spring 17 pushes out the push rod 16, and the push rod 16 pushes out the detection device terminal 2, and the insertion end 161 of the push rod 16 is pulled out from the plug interface 141, and the elastic reset mechanism drives the conductive key 14 to reset. When the conductive key 14 is in the reset state, the conductive part of the conductive key 14 contacts the conductive part of the wire interface 11 to complete the conduction, and the two conductive keys 14 maintain contact and conduction with the conductive sheet 15, and the secondary winding of the current transformer is short-circuited. Then, the current transformer terminal 1 and the detection device terminal 2 are separated, and there is no need to shut down the power for maintenance, thereby ensuring the continuous operation of the power system. The length of the conductive pin 23 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 141 below the conductive key 14, thereby ensuring the safety of the current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism during use.

[0084] When the detection device is reinstalled into the current transformer, the conductive pin 23 is inserted into the conductive contact sheet 18 and the detection device is connected to the current transformer. The conductive key 14 and the conductive sheet 15 are in conductive contact with the conductive part of the wire interface 11 to maintain a short circuit. Then the push rod 16 is pushed and retracted by the detection device terminal 2, and at least two insertion ends 161 are inserted into the insertion interface 141 to push the conductive key 14 upward to achieve insulation between the conductive part of the conductive key 14 and the conductive part of the wire interface 11. Now the detection device is reconnected and the conductive key 14 is disconnected to prevent the open circuit effect.

[0085] Example 2

[0086] refer to Figure 1 and Figure 2 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0087] A limit ear is provided on the conductive key 14, which limits the lowest falling position of the conductive key 14, and the limit ear is located outside the shell 13; a limit block is also provided on the conductive key 14, and the limit block is located inside the current transformer terminal 1, and the limit block is at the highest rising position of the conductive key 14; the upper and lower limit positions of the conductive key 14 are limited to prevent the conductive key 14 from falling off or the conductive part of the wire interface 11 from being compressed and deformed, thereby ensuring the stability of the current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism after multiple maintenance.

[0088] A rotating plug is provided above the detection device terminal 2, and the rotating plug can be rotatably matched with the detection device terminal 2; a card slot is provided on the shell 13; the rotating plug and the card slot serve as a locking mechanism 22; the rotating plug is inserted into the card slot, and the current transformer terminal 1 is fixedly connected with the detection device terminal 2; the rotating plug is disengaged from the card slot, and the push rod 16 pushes the detection device terminal 2 away from the solid current transformer terminal 1; the rotating plug is inserted into the card slot to facilitate the rapid and stable locking of the detection device terminal 2 and the solid current transformer terminal 1, and the rotating plug is disengaged from the card slot, which facilitates the separation of the detection device terminal 2 and the solid current transformer terminal 1, and the reset spring mechanism on the push rod 16 ensures that the detection device terminal 2 is quickly separated.

[0089] When in use, the conductive key 14 slides up and down through the limit ears and the limit blocks to prevent the conductive key 14 from falling off or deforming the conductive part of the wire interface 11. The rotating plug block is inserted into the slot to facilitate the rapid and stable locking of the detection device terminal 2 and the solid current transformer terminal 1. The rotating plug block is disengaged from the slot to facilitate the separation of the detection device terminal 2 and the solid current transformer terminal 1. The reset spring mechanism on the push rod 16 ensures that the detection device terminal 2 is quickly detached.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism, comprising a current transformer terminal and a detection device terminal; the current transformer terminal is a terminal for connecting a current transformer, and has two wire interfaces; a socket is conductively connected to the left side of the wire interface; the detection device terminal has two conductive plugs; the two conductive plugs and the two sockets adopt a matching plug-in structure; the current transformer terminal and the detection device terminal are detachably connected; the detection device terminal is a terminal for outputting current to the detection device, and is characterized in that: The current transformer terminal block has a housing, and two wire interfaces are arranged on the housing; Two movable conductive keys are respectively arranged on the two wire interfaces; An elastic reset mechanism is provided between the conductive key and the housing; The conductive key has a reset state and a raised state; The elastic reset mechanism drives the conductive key to reset. When the conductive key is in the reset state, the conductive part of the conductive key contacts the conductive part of the wire interface to complete the conduction. Also includes a conductive sheet disposed on the housing; At least two conductive bonds share a conductive sheet, and the two conductive bonds maintain contact with the conductive sheet for electrical conduction; When the two conductive keys are in a reset state, the conductive parts on the two conductive keys are also connected to the conductive sheet at the same time, thereby achieving connection between the two wire interfaces; When the conductive key is in the raised state, the conductive part on the conductive key is disconnected from the conductive part of the wire interface, thereby realizing the disconnection of the two wire interfaces; An elastic push-off mechanism is provided on the left side of the current transformer terminal; The elastic push-off mechanism comprises at least two push rods, and at least two push rods are respectively provided with a return spring mechanism; After the current transformer terminal and the detection device terminal are plugged in, at least two push rods are squeezed, at least two push rods are retracted, and the reset spring mechanism is in a power storage state; A locking mechanism is also provided between the current transformer terminal and the detection device terminal; At least two push rods are provided with insertion ends at their right ends; An insertion interface matching the insertion end is provided between the conductive part of the conductive key and the conductive part of the wire interface; At least two insertion ends are inserted into the insertion interface to push the conductive key upward to achieve insulation between the conductive part of the conductive key and the conductive part of the wire interface; After the locking mechanism between the current transformer terminal and the detection device terminal is unlocked, the current transformer terminal and the detection device terminal are separated by the reset thrust of the reset spring mechanism; During the separation process of the current transformer terminals and the detection device terminals: First, the push rod moves to the left and the insertion end is pulled out from the plug interface, and the conductive part of the conductive key is connected with the conductive part of the wire interface; Then, the two conductive plugs are separated from the two sockets.

2. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: The conductive key is provided with a first spring as an elastic reset mechanism, one end of the first spring is connected to the conductive key, and the other end is connected to the upper part of the housing; The insertion end of the push rod is inserted into the insertion interface of the conductive key, the conductive key moves upward to enter a raised state, the first spring is compressed, and the conductive part of the conductive key is insulated from the conductive part of the wire interface; The insertion end of the push rod is pulled out from under the conductive key, the first spring releases the compressed elastic force, the conductive key moves down and enters a reset state, the conductive part of the conductive key contacts the conductive part of the wire interface for conduction, and the two wire interfaces of the terminal block of the current transformer are short-circuited.

3. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: 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 shell.

4. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: The insertion end of the push rod is provided with an inclined surface for lifting the conductive key; Another inclined surface is arranged below the conductive key as an insertion interface, and the other inclined surface of the conductive key is arranged opposite to the inclined surface of the insertion end of the push rod.

5. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: The detection device wiring terminal is provided with two conductive pins, and the two conductive pins are respectively provided on the right sides of the two conductive plugs; Two conductive contact pieces are arranged in the current transformer terminal, and the two conductive contact pieces are arranged in the two wire interfaces; The conductive plug is inserted into the socket, and the conductive pin contacts and conducts electricity with the conductive contact sheet, so that the current transformer terminal is connected with the detection device terminal.

6. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 5, characterized in that: The length of the conductive pin inserted into the conductive contact sheet is greater than the length of the push rod insertion end extending into the insertion port below the conductive key.

7. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 5, characterized in that: The conductive contact piece is an elastic conductive contact piece, and the elastically contracted position of the conductive contact piece is the contact position between the conductive pin and the conductive contact piece.

8. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 5, characterized in that: The conductor pin is configured in a cylindrical cone shape.

9. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: The conductive key is provided with a limiting ear, the limiting ear limits the lowest falling position of the conductive key, and the limiting ear is located outside the shell; The conductive key is also provided with a limit block, the limit block is located inside the current transformer terminal, and the limit block is at the highest rising position of the conductive key.

10. The current transformer anti-open circuit maintenance terminal with a force storage push-off mechanism according to claim 1, characterized in that: A rotating plug block is provided above the detection device wiring terminal, and the rotating plug block and the detection device wiring terminal can be rotatably matched; The housing is provided with a card slot; The rotating plug and the card slot serve as a locking mechanism; The rotating plug is inserted into the slot, and the current transformer terminal is fixedly connected to the detection device terminal; The rotating plug block is disengaged from the slot, and the push rod pushes the detection device wiring terminal away from the fixed current transformer wiring terminal.

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