Portable wiring terminal structure for small-current grounding line selection device

Abstract

The utility model relates to the technical field of wiring terminals, and discloses a portable wiring terminal structure for a small current grounding line selection device, which comprises wiring terminals and a pin assembly, an installation backboard is detachably connected with the side wall of a shell of the current grounding line selection device, and the installation backboard is detachably connected with a plurality of wiring terminals. A pin assembly is inserted into the wiring terminal, a conductive clamping groove is formed in the wiring terminal, the pin assembly comprises an insulating head and a matching pin, one end of the matching pin is detachably connected with the insulating head, and the matching pin is clamped and matched with the conductive clamping groove. According to the utility model, tools such as screwdrivers are not needed, and the pins are integrally inserted into the terminals to complete wiring. Through a color identification and physical groove dual anti-misconnection structure, the problem of misconnection of different types of circuits is avoided in vision and operation levels, and modules in the device are effectively protected. Each LED indicating lamp feeds back the connection on-off state in real time, point-by-point detection by a universal meter is not needed during installation, and loose or poor-contact connection points can be rapidly positioned during later maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wiring terminal, concretely to a portable wiring terminal structure for small current grounding line selection device. BACKGROUND

[0002] The wiring terminal is the core component of the small current grounding line selection device and external line (zero sequence current transformer, zero sequence voltage transformer and power line), and the wiring convenience directly affects the installation efficiency and the later maintenance cost of the device. The wiring terminal used by the current small current grounding line selection device has the following key problems:

[0003] 1. Complicated wiring operation: the traditional terminal adopts a screw fastening structure, and when wiring, a screwdriver is used to loosen the screw one by one, insert the wire and tighten the fixing operation. In the multi-line (such as 32 zero sequence current lines + 4 zero sequence voltage lines) connection scene, the wiring time of a single device is more than 60 minutes, and the efficiency is low. Moreover, the screw is easy to slip due to uneven operation force, or loose due to long-term operation, causing poor contact.

[0004] 2. Poor anti-misconnection effect: although the existing terminal adopts a partition design, it only distinguishes the line type (such as "zero sequence current" and "zero sequence voltage") through text identification. In the scene of dim substation and parallel installation of multiple devices, the operation and maintenance personnel are easy to confuse the wiring type due to visual fatigue, leading to reverse connection or wrong connection, which may cause abnormal sampling data of the device, or even burn the internal acquisition module.

[0005] 3. Difficult to judge the wiring state: after the wire is connected, it is difficult to judge whether the contact is reliable through intuitive method, and it is necessary to measure the on-off state one by one with the help of a multimeter. It is also difficult to quickly troubleshoot the loose connection fault during later maintenance, increasing the operation and maintenance workload.

[0006] In order to solve the above problems, the utility model provides a portable wiring terminal structure for small current grounding line selection device. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a portable wiring terminal structure for small current grounding line selection device to solve the problems in the background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical scheme: a portable wiring terminal structure for small current grounding line selection device, comprising a wiring terminal and a pin integrated;

[0009] The mounting back plate is detachably connected with the side wall of the current grounding line selection device shell; the mounting back plate is detachably connected with a plurality of wiring terminals; the wiring terminal is inserted with the pin integrated; the wiring terminal is provided with a conductive slot;

[0010] The pin assembly comprises an insulating head and a mating pin; one end of the mating pin is detachably connected with the insulating head; the mating pin is in clamping cooperation with the conductive clamping groove.

[0011] Preferably, the mating pin comprises a connecting portion and a mating portion connected with each other; one end of the connecting portion of the mating pin is detachably connected with the insulating head; a plurality of annular grooves are formed on the outer side of the connecting portion of the mating pin; an external lead wire is detachably connected with the end of the mating pin away from the insulating head; a compression portion insulating protective sleeve is sleeved on the connecting portion of the mating pin; a butt joint groove is formed on the top surface of the terminal; the mating portion of the mating pin is in cooperation with the butt joint groove on the top surface of the terminal.

[0012] Preferably, the terminal comprises a terminal base, a terminal cover plate, a sliding rod, a movable conductive sheet and a spring; one end of the terminal cover plate is buckled on the opening surface of the terminal base; one end of the sliding rod extends into the terminal base; the sliding rod is in sliding connection with the terminal base; the end of the sliding rod extending into the terminal base is connected with the spring; a through hole is formed on the sliding rod; the movable conductive sheet is arranged in the terminal base; the pin assembly comprises an insulating head and the movable conductive sheet.

[0013] Preferably, an LED indicator light and a static conductive sheet are electrically connected with the terminal; the positive electrode of the LED indicator light is electrically connected with one end of the movable conductive sheet; the negative electrode of the LED indicator light is connected with the negative electrode of the internal power supply of the small current grounding and line selection device through a lead wire; the other end of the movable conductive sheet is in abutment with the side wall of the static conductive sheet; the static conductive sheet is connected with the positive electrode of the internal power supply of the small current grounding and line selection device through a lead wire.

[0014] Preferably, a square platform for abutting against the side wall of the conductive clamping groove is arranged on the side wall of the sliding rod.

[0015] Preferably, a power supply wiring unit area, a zero sequence voltage wiring unit area and a zero sequence current wiring unit area are arranged on the mounting back plate; the terminals are divided into first terminals, second terminals and third terminals according to the shapes of the butt joint grooves on the top surfaces; a plurality of the first terminals are detachably connected with the power supply wiring unit area; a plurality of the second terminals are detachably connected with the zero sequence voltage wiring unit area; a plurality of the third terminals are detachably connected with the zero sequence current wiring unit area; the shapes of the mating portions of the mating pins correspond to the butt joint grooves on the top surfaces of the terminals.

[0016] Preferably, the outer surface of the power supply wiring unit area is sprayed with a red mark; the outer surface of the zero sequence voltage wiring unit area is sprayed with a yellow mark; the outer surface of the zero sequence current wiring unit area is sprayed with a sky blue mark.

[0017] Compared with the prior art, the utility model has the advantages of

[0018] The wiring efficiency is greatly improved: without using screwdrivers and other tools, only the special pin is inserted into the terminal to complete the wiring.

[0019] The misconnection prevention effect is remarkable: through the "color identification + physical groove" double misconnection prevention structure, the misconnection problem of different types of lines can be completely avoided from the visual and operation level, and the internal module of the device is effectively protected.

[0020] The wiring state is intuitive and can be distinguished: the LED indicator light of each terminal real-time feedbacks the wiring on-off state, without the need for multimeter point-by-point detection during installation, and the loose or poor contact wiring point can be quickly located during later maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall appearance structure schematic view of the utility model;

[0022] Figure 2 It is the back structure schematic view of the utility model;

[0023] Figure 3 It is the pin integrated structure explosion view of the utility model;

[0024] Figure 4 It is the structure schematic view of the pin integrated structure not inserted into the wiring terminal of the utility model;

[0025] Figure 5 It is the structure cross-sectional schematic view of the pin integrated structure not inserted into the wiring terminal of the utility model;

[0026] Figure 6 It is the structure schematic view of the pin integrated structure inserted into the wiring terminal of the utility model;

[0027] Figure 7 It is the structure cross-sectional schematic view of the pin integrated structure inserted into the wiring terminal of the utility model;

[0028] Figure 8 It is the structure explosion view of the pin integrated structure and the wiring terminal of the utility model;

[0029] Figure 9 It is the pin integrated structure schematic view corresponding to the first wiring terminal in the utility model;

[0030] Figure 10 It is the pin integrated structure schematic view corresponding to the second wiring terminal in the utility model;

[0031] Figure 11 It is the pin integrated structure schematic view corresponding to the third wiring terminal in the utility model.

[0032] In the figure: 1 - current ground line selection device shell, 2 - mounting back plate, 3 - power supply wiring unit area, 4 - zero sequence voltage wiring unit area, 5 - zero sequence current wiring unit area, 6 - first wiring terminal, 7 - second wiring terminal, 8 - third wiring terminal, 9 - insulation head, 10 - matching needle, 11 - insulation protection sleeve of crimping part, 12 - external wire, 13 - LED indicator light, 14 - terminal base, 15 - terminal cover plate, 16 - sliding rod, 17 - moving conductive sheet, 18 - spring, 19 - conductive slot, 20 - static conductive sheet. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 The utility model provides a kind of technical solutions: a portable wiring terminal structure for small current ground line selection device, including wiring terminal and plug pin integration.Small current ground line selection device includes current ground line selection device shell 1 and mounting back plate 2, the mounting back plate 2 can be detachably connected with the side wall of the current ground line selection device shell 1.

[0035] The mounting back plate 2 is installed on the back of the current ground line selection device shell 1 by four M4 screws.The mounting back plate 2 is integrally formed by aluminum alloy material, and the whole is a cuboid structure (length 455mm x width 220mm x thickness 2mm), three independent installation grooves (spacing 6.5mm) are formed on the surface of the mounting back plate 2 along the length direction, for installing zero sequence current wiring unit area 5, zero sequence voltage wiring unit area 4 and power supply wiring unit area 3 respectively, four mounting holes (diameter 5mm) are arranged at the four corners of the mounting back plate 2, and are connected with the threaded holes on the back of the current ground line selection device shell 1 by M4 screws.

[0036] The power wiring unit area 3 is provided with two first wiring terminals 6, the corresponding area of the mounting back plate 2 is sprayed with red identification, the butt joint groove of each first wiring terminal 6 is a square groove, the butt joint groove depth is 4mm, the matching part shape of the matching pin 10 in the plug pin integration corresponds to the butt joint groove on the top surface of the wiring terminal.

[0037] The zero sequence voltage wiring unit area 4 is provided with eight second wiring terminals 7, the corresponding area of the mounting back plate 2 is sprayed with yellow identification, the butt joint groove of each second wiring terminal 7 is a circular groove, the butt joint groove depth is 4mm, the matching part shape of the matching pin 10 in the plug pin integration corresponds to the butt joint groove on the top surface of the wiring terminal.

[0038] The zero sequence current wiring unit area 5 is provided with sixty-four third wiring terminals 8, the corresponding area of the mounting back plate 2 is sprayed with sky blue identification, the butt joint groove of each third wiring terminal 8 is a triangular groove, the butt joint groove depth is 4mm, the matching part shape of the matching pin 10 in the plug pin integration corresponds to the butt joint groove on the top surface of the wiring terminal.

[0039] The plug pin integration includes three forms, which are matched with the butt joint grooves of the first wiring terminal 6, the second wiring terminal 7 and the third wiring terminal 8 respectively, the plug pin integration is made of red copper (tin-plated) material, and the matching part shape of the matching pin 10 in the plug pin integration corresponds to the butt joint groove (square / circular / triangular) on the top surface of the wiring terminal.

[0040] For the convenience of description, the utility model is introduced below by taking the case that the second wiring terminal 7 with a circular groove and the matching part of the matching pin 10 are circular:

[0041] The matching pin 10 includes a connecting part and a matching part connected with each other, a plurality of annular grooves are formed in the outer side surface of the connecting part of the matching pin 10, so as to improve the connection reliability with the conductive card slot 19.

[0042] A round hole is reserved at the front end of the connecting part of the matching pin 10, the insulating head 9 can be detachably connected at the round hole of the connecting part of the matching pin 10, the round hole of the connecting part of the matching pin 10 and the insulating head 9 realize interference fit, and the insulating head 9 is used to trigger the movable conductive sheet 17.

[0043] One end of the matching pin 10 away from the insulating head 9 is designed in a tubular shape, an external lead 12 can be detachably connected to the end surface of the matching pin 10 away from the insulating head 9, after the external lead 12 penetrates into the tubular shape of the matching pin 10, the two are tightly connected by a wire crimping pliers, a crimping part insulating protective sleeve 11 is sleeved at the connection between the matching pin 10 and the external lead 12, so as to realize insulation.

[0044] The terminal base 14 is made of engineering plastic, carries each terminal assembly, and ensures insulation.

[0045] The terminal cover plate 15 is made of engineering plastic, has four protrusions at four corners, and is in interference fit with the small hole reserved at the corresponding position of the terminal base 14, so as to encapsulate each terminal assembly inside the terminal base 14 and ensure insulation.

[0046] The conductive clamping groove 19 is made of beryllium copper, has a U-shaped structure, and has a concentric hole with a diameter of 3 mm on each of the upper and lower side walls. A conductive sheet is reserved at one end of the main body of the conductive clamping groove 19 and is connected to the lower part of the terminal.

[0047] The sliding rod 16 is made of engineering plastic and can slide in the U-shaped structure of the conductive clamping groove 19. The spring 18 is installed between the inner side wall of the terminal base 14 and one end of the sliding rod 16, and the sliding rod 16 is usually pushed outward by the spring 18.

[0048] The spring 18 is installed between the terminal base 14 and the sliding rod 16. When the mating pin 10 is in place, the sliding rod 16 is pushed out of the terminal base 14 under the spring force of the spring 18, so that the mating pin 10 is pressed on the conductive clamping groove 19, and reliable connection is achieved.

[0049] The sliding rod 16 is provided with a square platform that can be clamped on one side of the conductive clamping groove 19, so that the sliding rod 16 cannot be completely pushed out of the terminal base 14 under the action of the spring force. A circular hole with a diameter of 3 mm is formed in the sliding rod 16. When the sliding rod 16 is pushed into the terminal base 14, the circular hole can be concentric with the two concentric holes on the conductive clamping groove 19. At this time, the mating pin 10 is inserted, and the mating pin 10 can pass through the three holes at the same time. When the mating pin 10 is in place, the sliding rod 16 is loosened, and the sliding rod 16 moves outward under the action of the spring force. The concentric state of the above three circular holes is destroyed, and finally the mating pin 10 is clamped on the conductive clamping groove 19, so that the external wire 12 is finally connected with the wire below the static conductive sheet 20.

[0050] The static conductive sheet 20 and the dynamic conductive sheet 17 are made of beryllium copper, have the three core advantages of “high strength, high elasticity, and high conductivity and thermal conductivity”, and are key materials for solving the demand for structural strength and electrical performance.

[0051] The power supply mode of the state indication module: the LED indicator 13 is connected to the internal auxiliary power supply (3.3V DC power supply) of the small current grounding selection device, without additional external power supply, and the wiring structure is simplified.

[0052] Working principle:

[0053] Each of the terminal is integrated with the static conductive sheet 20, the dynamic conductive sheet 17 and the LED indicator lamp 13. When the pin integrated is not inserted or is not inserted in place, the static conductive sheet 20 and the dynamic conductive sheet 17 are connected, the static conductive sheet 20 is connected to the positive pole of the internal power supply of the small current grounding selection device through a wire, the dynamic conductive sheet 17 is connected to the positive pole of the LED indicator lamp 13 through a wire, and the negative pole of the LED indicator lamp 13 is connected to the negative pole of the internal power supply of the small current grounding selection device through a wire, that is, when the pin integrated is not inserted or is not inserted in place, the LED indicator lamp 13 is always on. When the pin integrated is inserted in place, the dynamic conductive sheet 17 is pushed away by the insulating head 9 at the end of the matching pin 10, the dynamic conductive sheet 17 is disconnected from the static conductive sheet 20, and the LED indicator lamp 13 is turned off. The wiring state can be directly judged.

[0054] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0055] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A portable terminal structure for a small current ground selector device, the small current ground selector device comprising a current ground selector device housing (1) and a mounting back plate (2) which is detachably connected to the side wall of the current ground selector device housing (1), characterized in that, The terminal and the pin are integrated; The terminal is detachably connected with the mounting backboard (2), and the pin is inserted into the terminal; a conductive clamping groove (19) is formed in the terminal; The pin includes a connecting part and a matching part which are connected with each other; one end of the connecting part of the pin is detachably connected with the insulating head (9); a plurality of annular grooves are formed on the outer side of the connecting part of the pin; an external wire (12) is detachably connected with the end face of the pin which is away from the insulating head (9); a compression part insulation protection sleeve (11) is sleeved with the pin and the external wire (12); a butt joint groove is formed on the top surface of the terminal; the matching part of the pin is connected with the butt joint groove on the top surface of the terminal.

2. A portable terminal according to claim 1, wherein The terminal includes a terminal base (14), a terminal cover plate (15), a sliding rod (16), a movable conductive sheet (17) and a spring (18); one end of the terminal cover plate (15) is buckled on the opening surface of the terminal base (14); one end of the sliding rod (16) is inserted into the terminal base (14); the sliding rod (16) is slidingly connected in the terminal base (14); one end of the sliding rod (16) which is inserted into the terminal base (14) is connected with the spring (18); a through hole is formed on the sliding rod (16); the movable conductive sheet (17) is arranged in the terminal base (14); the pin includes an insulating head (9) which is abutted with the movable conductive sheet (17).

3. A portable terminal according to claim 1, wherein the terminal is configured to be connected to the line by a plug. An LED indicator lamp (13) and a static conductive sheet (20) are electrically connected with the terminal; the positive electrode of the LED indicator lamp (13) is electrically connected with one end of the movable conductive sheet (17); the negative electrode of the LED indicator lamp (13) is connected with the negative electrode of the internal power supply of the small current grounding and line selection device through a wire; the other end of the movable conductive sheet (17) is abutted with the side wall of the static conductive sheet (20) to be connected; the static conductive sheet (20) is connected with the positive electrode of the internal power supply of the small current grounding and line selection device through a wire.

4. A portable terminal according to claim 3, wherein the terminal is configured to be connected to the line by a plug. A square table is arranged on the side wall of the sliding rod (16) to abut against the side wall of the conductive clamping groove (19).

5. A portable terminal according to claim 3, wherein the terminal is configured to be connected to the line by a plug. ​ 6. A portable terminal according to claim 2, wherein The mounting backboard (2) is provided with a power connection unit area (3), a zero sequence voltage connection unit area (4) and a zero sequence current connection unit area (5); the connection terminals are divided into first connection terminals (6), second connection terminals (7) and third connection terminals (8) according to the different shapes of the top surface butt grooves; the power connection unit area (3) is detachably connected with a plurality of the first connection terminals (6); the zero sequence voltage connection unit area (4) is detachably connected with a plurality of the second connection terminals (7); the zero sequence current connection unit area (5) is detachably connected with a plurality of the third connection terminals (8); the shape of the matching part of the matching pin (10) corresponds to the top surface butt groove of the connection terminal.

7. A portable terminal according to claim 6, wherein the terminal is configured to be connected to the line by a plug. The outer surface of the power connection unit area (3) is sprayed with a red mark; the outer surface of the zero sequence voltage connection unit area (4) is sprayed with a yellow mark; and the outer surface of the zero sequence current connection unit area (5) is sprayed with a sky blue mark.

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