Overhaul terminal open-circuit-preventing locking bolt system

Abstract

The utility model relates to the technical field of electric power systems, in particular to an open-circuit-proof locking bolt system for a maintenance terminal, which is characterized in that a current transformer wiring terminal is provided with a shell, wire interfaces are arranged on the shell, movable conductive movable blocks are respectively arranged on the wire interfaces, and an elastic reset mechanism is arranged between each conductive movable block and the shell; the conductive sheet is arranged on the shell; the conductive movable block is in contact conduction with the conductive sheet; a locking bolt mechanism is arranged on the left side of the current transformer wiring terminal; the current transformer wiring terminal comprises a push rod, a reset spring mechanism is arranged on the push rod, and an insertion head is arranged at the right end of the push rod. The lower end of the conductive part of the conductive movable block is provided with a plug-in interface which is matched with the plug-in head and is located above the wire interface. When the detection equipment of the current transformer is disassembled, assembled and overhauled, the conducting wire interface can be conducted through the conductive movable block, two ends of the secondary winding of the current transformer are short-circuited, and continuous operation of a power system is ensured without power failure for overhauling.

Description

TECHNICAL FIELD

[0001] The utility model relates to power system technical field especially relates to a current transformer prevents open circuit overhauls terminal. BACKGROUND

[0002] Current transformer converts the primary side large current into the secondary side small current to measure when working, the secondary side cannot be open circuit, because the current transformer secondary winding is more primary winding is less, if the current transformer secondary side suddenly open circuit in the circuit operation, will produce a relatively high voltage at the two ends of the break, damage the equipment or leave the security hidden danger, therefore, the secondary current loop prohibits open circuit in the operation.

[0003] The secondary current loop transmits the low current signal after the current transformer conversion to the measuring instrument, protection relay and automation control equipment.

[0004] Under the traditional maintenance mode, when the detection equipment in the secondary current loop fails or needs maintenance, power outage is usually needed for maintenance, which not only affects the continuous operation of the power system, but also may cause safety hazards and economic losses. SUMMARY

[0005] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments, which may be simplified or omitted in this section and the abstract and title of the application to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplification or omission cannot be used to limit the scope of the utility model.

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

[0007] To solve the above technical problems, the utility model provides the following technical scheme.

[0008] The overhauls terminal prevents open circuit locking bolt system, including current transformer wiring terminal, the current transformer wiring terminal right side is provided with wire interface, current transformer wiring terminal left side is provided with connecting socket, connecting socket with Wire interface conductive connection.

[0009] The current transformer wiring terminal has a shell, and the wire interface is arranged in the shell.

[0010] The shell is provided with an upper and lower movable conductive movable block, the conductive movable block is arranged above the wire interface, and an elastic reset mechanism is arranged between the conductive movable block and the shell.

[0011] The elastic reset mechanism drives the conductive movable block to reset and fall, and the conductive part of the falling conductive movable block is in contact with the conductive part of the wire interface for conduction;

[0012] The conductive sheet is arranged on the shell, and the conductive movable block is in contact with the conductive sheet for conduction, and the conductive sheet is provided with a grounding terminal;

[0013] The push rod is made of insulating material;

[0014] The reset spring mechanism is arranged on the push rod, and one end of the reset spring mechanism is connected with the push rod and the other end is connected with the shell;

[0015] The push rod is arranged on the left side of the current transformer terminal, the right end of the push rod extends into the shell, the left end of the push rod extends out of the shell, and the direction of the push rod extending out of the shell is consistent with the direction of the connecting socket;

[0016] The right end of the push rod is provided with an insertion head;

[0017] The conductive part of the conductive movable block is provided with an insertion interface, the insertion interface is matched with the insertion head, and the insertion interface is located above the wire interface;

[0018] The insertion head in the insertion interface lifts the conductive movable block, and the conductive part of the lifted conductive movable block is disconnected with the conductive part of the wire interface.

[0019] The above design, first of all, by setting the conductive movable block, the conductive part on the conductive movable block is also in conduction with the conductive sheet in the reset state, the conductive sheet is provided with a grounding terminal, the secondary current loop of the current transformer can be grounded, and the grounding can prevent high voltage caused by incorrect open circuit of the secondary side current of the current transformer, and improve the safety of the maintenance terminal anti-open circuit locking bolt system.

[0020] The two ends of the secondary winding of the current transformer are respectively connected to two current transformer terminals, and the conductive blocks on the two current transformer terminals can be conductively connected, and can be.

[0021] Then through the setting of the push rod, the current transformer wiring terminal is detached or installed with the detection device wiring terminal, when the detection device wiring terminal is inserted into the connecting socket on the left side of the current transformer wiring terminal during installation, the push rod is pushed by the inserted detection device wiring terminal, the insertion head is inserted into the plug-in interface, and the conductive movable block is pushed up to realize the insulation of the conductive part of the conductive movable block and the conductive part of the wire interface; when the detection device wiring terminal is detached, the insertion head is pushed out of the plug-in interface 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 and maintenance of the detection equipment of the current transformer, the wire interface can be automatically connected by the conductive movable block, the automatic grounding of the secondary winding of the current transformer is realized, and the damage of the equipment caused by the high electromotive force induced by the secondary winding due to the operation error of the worker or the safety hidden danger is avoided.

[0022] The current transformer wiring terminal has at least two current transformer wiring terminals, and the conductive sheets on the at least two current transformer wiring terminals are conductively connected to each other. In a complex circuit, multiple current transformers can be integrated and connected by multiple current transformer wiring terminals, which not only saves space, but also automatically shorts the current transformer during detection of the detection device wiring terminal, avoiding the damage of the equipment caused by the high electromotive force induced by the secondary winding due to the operation error of the worker or the safety hidden danger.

[0023] Preferably, the insertion head of the push rod is provided with a slope for lifting the conductive movable block; another slope is provided below the conductive movable block as a plug-in interface, and the other slope of the conductive movable block is oppositely arranged with the slope of the insertion head of the push rod; by setting the slope and the other slope, the insertion head is inserted into the plug-in interface to lift the conductive movable block and keep the conductive part of the wire interface insulated.

[0024] Preferably, a first spring is arranged on the conductive movable block 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 upper side of the shell; a second spring is arranged 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.

[0025] The insertion head of the push rod is inserted into the insertion interface of the conductive movable block, the conductive movable block moves upward into a raised state, the first spring is compressed, and the conductive part of the conductive movable block is kept insulated from the conductive part of the wire interface; the insertion head of the push rod is pulled out from below the conductive movable block, the compressed elastic force of the first spring is released, the conductive movable block moves downward into a reset state, the conductive part of the conductive movable block is in contact with the conductive part of the wire interface, and the wire interface of the connection terminal of the current transformer is short-circuited; by setting the first spring as an elastic reset mechanism, the structure is simple, the cost is reduced, and the conductive movable block can be quickly and stably reset to be in contact with the conductive part of the wire interface when the insertion head of the push rod is pulled out, so that a high induced electromotive force is prevented from being induced by the secondary coil due to unstable contact.

[0026] Preferably, a through opening is arranged on the left side of the shell to connect the inside and outside of the shell, and the push rod extends into the shell through the through opening; a protruding structure is arranged on the push rod, one end of the second spring is connected to the protruding structure, and the other end is connected to the outer edge of the through opening; a supporting structure is further arranged on the left side of the shell to support the push rod, the protruding structure is arranged between the supporting structure and the through opening, and the left end of the push rod extends from the left side of the supporting structure; the through opening and the supporting structure are arranged to facilitate the sliding and parallel movement of the push rod.

[0027] Further, an upward opening structure is formed between the supporting structure and the shell, which facilitates the fixation of the connection terminal of the detection device and the connection terminal of the current transformer after the connection terminal of the detection device is inserted into the connection interface.

[0028] Preferably, a conductive contact sheet is arranged in the connection interface, the conductive contact sheet is made of copper; the conductive contact sheet is in conductive connection with the wire interface; the plug of the connection terminal of the detection device is in conductive contact with the conductive contact sheet, so that the connection terminal of the current transformer and the connection terminal of the detection device are in conductive connection, and stable conductive connection is facilitated.

[0029] Preferably, at least two conductive contact sheets are arranged, the at least two conductive contact sheets have opposite contraction ends, and the contraction ends of the at least two conductive contact sheets constitute the conductive contact points of the connection interface; the conductive contact sheet is an elastic conductive contact sheet. The conductive contact sheet has opposite contraction ends, so that the plug can be smoothly inserted into the connection interface and can be in smooth contact, and the problem of damage to the plug or the connection interface caused by poor contact is prevented.

[0030] Preferably, at least two of the conductive contact pieces are provided with an outward turning structure, the outward turning structures on the at least two conductive contact pieces form a gap structure, the gap structure is arranged on the left side of the retracted end, and the gap direction of the gap structure is consistent with the direction of the connecting socket; the arrangement of the gap structure facilitates the insertion of the conductors on the plug, thereby facilitating the insertion of the plug into the connecting socket and maintaining the conductive contact through the retracted end.

[0031] Preferably, the inside of the shell is further connected with an insertion limiting block, the insertion limiting block is located between the retracted end and the wire interface; the insertion limiting block prevents the plug from being inserted too deeply to damage the conductive contact piece or the wire interface.

[0032] Preferably, the distance between the insertion limiting block and the retracted end on the conductive contact piece is greater than the length of the stroke of the push rod; when the detection device terminal is pulled out, the insertion head of the push rod is pulled out from the plug-in interface first, the conductive movable block falls down first, the conductive part on the conductive movable block contacts the conductive part of the wire interface first, the secondary circuit of the current transformer is short-circuited first, and then the plug is separated from the conductive contact piece, thereby ensuring that the secondary circuit of the current transformer is always short-circuited, and ensuring the safety of the maintenance terminal anti-open circuit locking bolt system in use.

[0033] Preferably, the conductive contact piece is a flexible conductive contact piece, and the retracted position of the flexible conductive contact piece is the contact position of the plug and the conductive contact piece; the conductive contact piece has flexibility, thereby ensuring stable conductive contact connection between the plug and the conductive contact piece.

[0034] Preferably, the conductor pin is in a cylindrical conical shape; the conductor pin is convenient to insert into the conductive contact piece and achieve close contact.

[0035] Preferably, a limiting lug is arranged on the conductive movable block, the limiting lug limits the lowest falling position of the conductive movable block, and the limiting lug is located outside the shell; a limiting block is further arranged on the conductive movable block, the limiting block is located inside the current transformer terminal, and the limiting block limits the highest rising position of the conductive movable block; the limiting lug and the limiting block limit the upper and lower limit positions of the conductive movable block, prevent the conductive movable block from falling off or the conductive part of the wire interface from being deformed, and ensure the stability of the maintenance terminal anti-open circuit locking bolt system after multiple maintenance.

[0036] Preferably, the detection device terminal is provided with a rotating plug above, the rotating plug is rotatable matched with the detection device terminal; the shell is provided with a clamping groove; the rotating plug and the clamping groove are used as a locking mechanism; the rotating plug is clamped into the clamping groove; the current transformer terminal and the detection device terminal are fixedly connected; the rotating plug is separated from the clamping groove, the push rod pushes away the detection device terminal and the fixed current transformer terminal is separated; the rotating plug is inserted into the clamping groove, which facilitates the quick and stable locking of the detection device terminal and the fixed current transformer terminal; the rotating plug is separated from the clamping groove, which facilitates the separation of the detection device terminal and the fixed current transformer terminal; the locking bolt mechanism on the push rod ensures that the detection device terminal is quickly separated. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor under the premise of not paying the creative labor. Among them:

[0038] Figure 1 The structure diagram of the push rod of the present application is not inserted into the conductive movable block and falls;

[0039] Figure 2 The structure diagram of the push rod of the present application is inserted into the conductive movable block and rises;

[0040] Figure 3 The structure diagram of the five current transformer terminals of the present application is combined. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purpose, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail in the following with reference to the drawings of the specification.

[0042] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalization without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0043] Secondly, the present application is described in detail in combination with the schematic diagram, in order to facilitate the description, the cross-sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application here. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0044] Thirdly, the "one embodiment" or "embodiment" referred to herein means a specific feature, structure, or characteristic that is included in less than all implementations of the present application. Therefore, it is noted that the phrases "in one embodiment," "in an embodiment," "in at least one embodiment," "in at least one implementation," and the like, do not necessarily refer to the same embodiment, although they can.

[0045] Embodiment 1

[0046] Reference Figures 1-3 , the maintenance terminal anti-open circuit locking bolt system comprises a current transformer wiring terminal 1, a wire interface 11 is arranged on the right side of the current transformer wiring terminal 1, and a connecting socket 12 is arranged on the left side of the current transformer wiring terminal 1, and the connecting socket 12 is in conductive connection with the wire interface 11.

[0047] The current transformer wiring terminal 1 has a shell 13, and the wire interface 11 is arranged in the shell 13;

[0048] The shell 13 is provided with an upper and lower movable conductive movable block 14, the conductive movable block 14 is arranged above the wire interface 11, and an elastic reset mechanism is arranged between the conductive movable block 14 and the shell 13;

[0049] The elastic reset mechanism drives the conductive movable block 14 to reset and fall, and the conductive part of the falling conductive movable block 14 is in conductive contact with the conductive part of the wire interface 11;

[0050] Further comprising a conductive sheet 15 arranged on the shell 13, the conductive movable block 14 and the conductive sheet 15 are in conductive contact, and the conductive sheet 15 is provided with a grounding terminal;

[0051] The current transformer wiring terminal 1 is provided with a push rod 16, and the push rod 16 is made of an insulating material;

[0052] The push rod 16 is provided with a reset spring mechanism, one end of the reset spring mechanism is connected with the push rod 16, and the other end is connected with the shell 13;

[0053] The push rod 16 is arranged on the left side of the current transformer wiring terminal 1, the right end of the push rod 16 extends into the shell 13, the left end of the push rod 16 extends out of the shell 13, and the direction in which the push rod 16 extends out of the shell 13 is consistent with the direction of the connecting socket 12;

[0054] The right end of the push rod 16 is provided with an insertion head 161;

[0055] The conductive part of the conductive movable block 14 is provided with an insertion interface 141, the insertion interface 141 is matched with the insertion head 161, and the insertion interface 141 is located above the wire interface 11;

[0056] The insertion head 161 in the plug interface 141 lifts the conductive movable block 14, and the conductive part of the lifted conductive movable block 14 is disconnected from the conductive part of the wire interface 11.

[0057] The design described above first sets the conductive movable block 14, and in the reset state, the conductive part on the conductive movable block 14 is in conduction with the conductive sheet 15, which is provided with a grounding terminal. The secondary current loop of the current transformer can be grounded, which can prevent high voltage caused by incorrect open circuit of the secondary side current of the current transformer, and improve the safety of the maintenance terminal anti-open circuit locking bolt system.

[0058] The two ends of the secondary winding of the current transformer are connected to two current transformer terminals 1, and the conductive blocks on the two current transformer terminals 1 can be conductively connected.

[0059] Then, by setting the push rod 16, when the current transformer terminal 1 is detached or installed with the detection device terminal, the detection device terminal is inserted into the connection socket 12 on the left side of the current transformer terminal 1, the push rod 16 is pushed by the inserted detection device terminal, the insertion head 161 is inserted into the plug interface 141, and the insertion head 161 pushes the conductive movable block 14 to move upwards, realizing the insulation of the conductive part of the conductive movable block 14 and the conductive part of the wire interface 11; when the detection device terminal is detached, the insertion head 161 is pushed out of the plug interface 141 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, when the detection equipment of the current transformer is disassembled and maintained, the wire interface 11 can be automatically connected by the conductive movable block 14, the automatic grounding of the secondary winding of the current transformer is realized, and the worker's operation error is avoided to cause the secondary winding to induce extremely high electric damage to the equipment or leave a safety hazard.

[0060] There are at least two current transformer terminals 1, and the conductive sheets 15 on the at least two current transformer terminals 1 are conductively connected to each other. In complex lines, multiple current transformers can be integrated and connected by multiple current transformer terminals 1, which not only saves space, but also automatically shorts the current transformer when the detection device terminal is detached for detection, avoiding the worker's operation error to cause the secondary winding to induce extremely high electric damage to the equipment or leave a safety hazard.

[0061] The insertion head 161 of the push rod 16 is provided with a slope for lifting the conductive movable block 14; another slope is provided below the conductive movable block 14 as a plug interface 141, and the other slope of the conductive movable block 14 is oppositely arranged with the slope of the insertion head 161 of the push rod 16; by setting the slope and the other slope, the insertion head 161 is inserted into the plug interface 141 to lift the conductive movable block 14 and keep the conductive part of the wire interface 11 insulated.

[0062] The left side of the shell 13 is provided with a through port for connecting the inside and outside of the shell 13, and the push rod 16 extends into the shell 13 through the through port; the push rod 16 is provided with 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 through port; the left side of the shell 13 is further provided with a support structure 110 for supporting the push rod 16, the protruding structure is arranged between the support structure 110 and the through port, and the left end of the push rod 16 extends from the left side of the support structure 110; the through port and the support structure 110 are arranged to facilitate the sliding of the push rod 16 back and forth while keeping parallel.

[0063] The conductive movable block 14 is provided with a first spring 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 above the shell 13; 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 shell 13.

[0064] The insertion head 161 of the push rod 16 is inserted into the insertion port 141 of the conductive movable block 14, the conductive movable block 14 moves upwards into a raised state, the first spring is compressed, and the conductive part of the conductive movable block 14 keeps insulation with the conductive part of the wire interface 11; the insertion head 161 of the push rod 16 is separated from below the conductive movable block 14, the first spring releases the compressed elastic force, the conductive movable block 14 moves downwards into a reset state, the conductive part of the conductive movable block 14 contacts and conducts electricity with the conductive part of the wire interface 11, and the wire interface 11 of the connection terminal of the current transformer is short-circuited; the first spring is arranged as an elastic reset mechanism, which is simple in structure, reduces cost, and can quickly and stably reset the conductive movable block 14 to contact and conduct electricity with the conductive part of the wire interface 11 when the insertion head 161 of the push rod 16 is pulled out, preventing unstable contact from causing the secondary coil to induce a very high induced electromotive force; the second spring 17 is arranged as a reset spring mechanism to ensure the quick separation of the current transformer connection terminal 1 and the detection device connection terminal, avoiding slow separation when opening, unstable contact, electric sparks, or other high potential safety hazards.

[0065] The left side of the shell 13 is provided with a through port for connecting the inside and outside of the shell 13, and the push rod 16 extends into the shell 13 through the through port; the push rod 16 is provided with 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 through port; the left side of the shell 13 is further provided with a support structure 110 for supporting the push rod 16, the protruding structure is arranged between the support structure 110 and the through port, and the left end of the push rod 16 extends from the left side of the support structure 110; the through port and the support structure 110 are arranged to facilitate the sliding of the push rod 16 back and forth while keeping parallel.

[0066] Further, the upper side of the support structure 110 forms an upward opening structure with the shell 13, which facilitates the insertion of the detection device terminal into the connecting socket 12 and the fixation of the detection device terminal and the current transformer terminal 1 by the insertion opening structure.

[0067] In use, when the current transformer needs to be disassembled for detection device maintenance or replacement, the locking mechanism is unlocked, the compression elastic force of the second spring 17 pushes the push rod 16 out, the push rod 16 pushes the detection device terminal out, the insertion head 161 of the push rod 16 is pulled out of the insertion 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 is in contact with the conductive part of the wire interface 11, the conduction is completed, the conductive movable block 14 and the conductive sheet 15 remain in contact and conduction, the secondary winding of the current transformer is short-circuited, then the current transformer terminal 1 and the detection device terminal are separated, without power-off maintenance, the continuous operation of the power system is ensured, the length of the plug inserted into the conductive contact sheet 18 is greater than the length of the insertion head 161 of the push rod 16 inserted into the insertion interface below the conductive movable block 14, which ensures the safety of the maintenance terminal anti-open circuit locking pin system in use.

[0068] When the detection device is reassembled into the current transformer, the plug inserted into the conductive contact sheet 18 is inserted into the detection device in the current transformer, the conductive movable block 14 and the conductive sheet 15 are in conductive contact with the conductive part of the wire interface 11 and remain short-circuited, then the push rod 16 is pushed by the detection device terminal to shrink, the insertion head 161 is inserted into the insertion interface, the conductive movable block 14 is pushed to move upwards, the conductive part of the conductive movable block 14 is insulated from the conductive part of the wire interface 11, and the detection device is reconnected and the conductive movable block 14 is disconnected to prevent the occurrence of open circuit.

[0069] Embodiment 2

[0070] Reference Figure 1 and Figure 2 As the second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0071] The conductive contact sheet 18 is provided in the connecting socket 12 and is made of copper; the conductive contact sheet 18 is in conductive connection with the wire interface 11; the plug of the detection device terminal is in conductive contact with the conductive contact sheet 18, so that the current transformer terminal 1 and the detection device terminal are in conductive connection, which facilitates the stable conductive connection.

[0072] The at least two conductive contact pieces 18 have opposite tapered ends, and the tapered ends on the at least two conductive contact pieces 18 constitute conductive contacts of the connecting socket 12; the conductive contact pieces 18 are elastic conductive contact pieces 18. The conductive contact pieces 18 have opposite tapered ends, which ensure that the plug can be smoothly inserted into the connecting socket 12 and can be in smooth contact with the conductive contacts, thereby preventing poor contact from causing electric spark damage to the plug or the connecting socket 12.

[0073] The at least two conductive contact pieces 18 are each provided with an everted structure, the everted structures on the at least two conductive contact pieces 18 constitute a flared structure, the flared structure is arranged on the left side of the tapered end, and the flaring direction of the flared structure is consistent with the orientation of the connecting socket 12; the flared structure facilitates the insertion of the conductor on the plug, thereby facilitating the insertion of the plug into the connecting socket 12 and maintaining the conductive contact through the tapered end.

[0074] The inside of the shell 13 is further connected with an insertion limiting block 19, which is located between the tapered end and the wire interface 11; the insertion limiting block 19 prevents the plug from being inserted too deeply and damaging the conductive contact pieces 18 or the wire interface 11.

[0075] The distance between the insertion limiting block 19 and the tapered end on the conductive contact piece 18 is greater than the length of the stroke of the push rod 16; when the detection device connection terminal is pulled out, the insertion head 161 of the push rod 16 is pulled out of the plug-in interface first, the conductive movable block 14 falls down first, the conductive part on the conductive movable block 14 contacts the conductive part of the wire interface 11 first, thereby short-circuiting the secondary circuit of the current transformer, and then the plug is separated from the conductive contact piece 18, which ensures that the secondary circuit of the current transformer is always short-circuited and guarantees the safety of the maintenance terminal anti-open circuit locking bolt system in use.

[0076] The conductive contact piece 18 is an elastic conductive contact piece 18, and the elastic tapered position of the conductive contact piece 18 is the contact position of the plug and the conductive contact piece 18; the conductive contact piece 18 has elasticity, which ensures that the plug is stably connected to the conductive contact piece 18.

[0077] The conductor pin is in a cylindrical conical shape; this facilitates the insertion of the conductor pin into the conductive contact piece 18 and achieves close contact.

[0078] The conductive movable block 14 is provided with a limiting lug, which limits the lowest falling position of the conductive movable block 14, and the limiting lug is located outside the shell 13; the conductive movable block 14 is also provided with a limiting block, which is located inside the current transformer connection terminal 1 and limits the highest rising position of the conductive movable block 14; the limiting block limits the upper and lower limit positions of the conductive movable block 14, prevents the conductive movable block 14 from falling off or deforming the conductive part of the wire interface 11, and guarantees the stability of the maintenance terminal anti-open circuit locking bolt system after multiple maintenance.

[0079] The rotating plug is arranged above the detection device terminal and is rotatably matched with the detection device terminal; the shell 13 is provided with a clamping groove; the rotating plug and the clamping groove are used as a locking mechanism; the rotating plug is clamped into the clamping groove, and the current transformer terminal 1 and the detection device terminal are fixedly connected; the rotating plug is disengaged from the clamping groove, and the push rod 16 pushes away the detection device terminal to separate the detection device terminal from the current transformer terminal 1; the rotating plug is inserted into the clamping groove to facilitate the quick and stable locking of the detection device terminal and the current transformer terminal 1, the rotating plug is disengaged from the clamping groove to facilitate the separation of the detection device terminal and the current transformer terminal 1, and the push rod 16 is provided with a locking latch mechanism to ensure that the detection device terminal is quickly separated.

[0080] In use, the conductive movable block 14 is prevented from falling off or being pressed and deformed by the limiting ears and the limiting blocks when sliding up and down, the rotating plug is inserted into the clamping groove to facilitate the quick and stable locking of the detection device terminal and the current transformer terminal 1, the rotating plug is disengaged from the clamping groove to facilitate the separation of the detection device terminal and the current transformer terminal 1, and the push rod 16 is provided with a reset spring mechanism to ensure that the detection device terminal is quickly separated. When the plug is inserted, the conductor in the plug will open the two conductive contact pieces 18 from the top of the opening structure and form a conductive contact through the contraction end of the two conductive contact pieces 18 to maintain the conductive contact. The conductive contact pieces 18 are elastically pressed on the conductor of the plug to ensure the stability of the conductive connection and prevent the generation of electric sparks.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. Overhaul terminal anti-open circuit locking latch system, comprising a current transformer terminal, the current transformer terminal is provided with a wire interface on the right side, the current transformer terminal is provided with a connecting socket on the left side, the connecting socket is in conductive connection with the wire interface, characterized in that: the current transformer terminal has a shell, and the wire interface is arranged in the shell; a conductive movable block movably arranged on the shell is arranged above the wire interface; a elastic reset mechanism is arranged between the conductive movable block and the shell; the elastic reset mechanism drives the conductive movable block to reset and fall, and the conductive part of the falling conductive movable block is in conductive contact with the conductive part of the wire interface; further comprising a conductive sheet arranged on the shell, the conductive movable block and the conductive sheet are in conductive contact, and the conductive sheet is provided with a grounding terminal; the current transformer terminal is provided with a push rod on the left side, and the push rod is made of insulating material; the push rod is provided with a reset spring mechanism, one end of the reset spring mechanism is connected with the push rod, and the other end is connected with the shell; the push rod is arranged on the left side of the current transformer terminal, the right end of the push rod extends into the shell, the left end of the push rod extends out of the shell, and the direction of the push rod extending out of the shell is consistent with the direction of the connecting socket; the right end of the push rod is provided with an insertion head; the lower end of the conductive part of the conductive movable block is provided with an insertion interface, the insertion interface is matched with the insertion head, and the insertion interface is located above the wire interface; the insertion head in the insertion interface lifts the conductive movable block, and the conductive part of the lifted conductive movable block is disconnected with the conductive part of the wire interface; at least two current transformer terminals are provided, and the conductive sheets on the at least two current transformer terminals are in conductive connection with each other; the insertion head of the push rod is provided with a slope for lifting the conductive movable block; another slope is arranged below the conductive movable block as an insertion interface, and the other slope of the conductive movable block is arranged opposite to the slope of the insertion head of the push rod; a first spring is arranged on the conductive movable block as the elastic reset mechanism, one end of the first spring is connected with the conductive movable block, and the other end is connected above the shell; a second spring is arranged on the push rod as the reset spring mechanism, one end of the second spring is connected with the push rod, and the other end is connected on the left side of the shell; a through hole is arranged on the left side of the shell for connecting the inside and outside of the shell, and the push rod extends into the shell through the through hole; a protruding structure is arranged on the push rod, one end of the second spring is connected with the protruding structure, and the other end is connected at the outer edge of the through hole; a supporting structure is further arranged on the left side of the shell for supporting the push rod, the protruding structure is arranged between the supporting structure and the through hole, and the left end of the push rod extends out of the left side of the supporting structure; a conductive contact sheet is arranged in the connecting socket, and the conductive contact sheet is made of copper material; the conductive contact sheet is in conductive connection with the wire interface; at least two conductive contact sheets are arranged, the conductive contact sheets have opposite contraction ends, and the contraction ends of the at least two conductive contact sheets form conductive contact points of the connecting socket; the conductive contact sheet is a flexible conductive contact sheet. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The service terminal anti-opening lockout system of claim 1, wherein: ​ 3. The service terminal anti-opening locking plug system according to claim 1, characterized in that: ​ ​ 4. The service terminal anti-opening locking plug system according to claim 1, characterized in that: ​ ​ 5. The service terminal anti-opening lock bolt system according to claim 4, characterized in that: ​ ​ ​ 6. The service terminal anti-opening locking plug system according to claim 1, characterized in that: ​ ​ 7. The service terminal anti-opening locking plug system according to claim 6, characterized in that: ​ ​ 8. The service terminal anti-opening locking plug system according to claim 7, characterized in that: At least two of the conductive contact pieces are provided with an outward turning structure, and the outward turning structures on the at least two conductive contact pieces form a mouth opening structure, which is arranged on the left side of the contraction end, and the mouth opening direction of the mouth opening structure is consistent with the direction of the connecting socket.

9. The service terminal anti-opening locking plug system according to claim 7, characterized in that: The inside of the shell is further connected with an insertion limiting block, which is located between the contraction end and the wire interface.

10. The service terminal anti-opening locking plug system according to claim 9, characterized in that: The distance between the insertion limiting block and the contraction end on the conductive contact piece is greater than the stroke length of the push rod.

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