Auxiliary device for electrical test of transformer

Abstract

The utility model discloses a transformer electrical test auxiliary device which comprises an insulating shell, the top of the insulating shell is fixedly connected with a copper sleeve, the top of the copper sleeve is arranged to be of an arc-shaped structure, and a copper wire is fixedly embedded in the right side of the bottom of the copper sleeve. According to the utility model, a series of structures are arranged, so that automatic elastic precise pressure-controlled tightening pressing and fixing can be conveniently carried out when the device is connected with the outgoing line end part of the transformer winding, a prompt can be clearly given when pressure-controlled fixing is carried out, the fixing strength can be conveniently and accurately controlled, the risk of separation caused by factors such as vibration can be avoided, and a worker does not need to independently carry out threading work from the inside; according to the invention, the elastic tightening operation can be continuously carried out by utilizing the elastic tightening mode of the spring, the risk of loosening and separation caused by factors such as vibration is reduced, the connection anti-separation stability and convenience are improved, and in addition, a prompt lamp is turned on to give out a prompt, so that personnel can clearly know the connection stable state in the debugging operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power safety, specifically is a transformer electrical test auxiliary device. BACKGROUND

[0002] The transformer is the main equipment of the electric power system, and any fault of the transformer is easy to cause the interruption of power transmission in a local area, directly affecting the smooth progress of industrial production, therefore, it is necessary to carry out regular test on the transformer to judge its insulation condition, in the process of carrying out the transformer electrical test, the winding end needs to be short-circuited to establish equipotential in the process of voltage application, and the process usually needs tools such as short-circuiting wire and wire clamp, the winding end is short-circuited in the traditional transformer electrical test process, the bare copper wire is short-circuited in the mode, and it needs to be bound and fixed, which is low in efficiency and easy to fall off.

[0003] For this, according to the search report of the novelty search agency, the announcement number CN211979172U discloses a kind of auxiliary short-circuiting device for transformer electrical test, including short-circuiting wire and limiting device, the short-circuiting wire one end is fixedly connected on the shell of the limiting device, and the other end passes through from the limiting device inside;It can effectively avoid the security problem that the traditional way short-circuiting bare copper wire is difficult to fix and easy to fall off, and can greatly improve the work efficiency of test personnel.

[0004] The above-mentioned technical disclosure of a kind of auxiliary short-circuiting device for transformer electrical test, by the one end of copper wire is set round sleeve and is placed in transformer winding outlet end, then copper wire is pulled tight after the one end of copper wire passes through limiting device and is fixed using limiting device, copper wire limiting work is carried out, but there are still the following deficiencies in use: the way of being directly fixed by the one end of copper wire and limiting device to form sleeve-like sleeve, copper wire needs to be replaced separately and rethreading work is carried out after being worn after multiple uses, cannot be connected and conducted conveniently and accurately controlled pressure, and simple sleeve limiting also has the risk of falling apart due to vibration factor, it is difficult to accurately control fixing strength, and cannot be in real time after connection Clearing remind personnel to be in stable connection state, use convenience and stability are not ideal;In view of this, the present application proposes a kind of auxiliary device for transformer electrical test to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of auxiliary device for transformer electrical test to solve the problems raised in the above background.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a transformer electrical test auxiliary device, including the insulating shell, the top of insulating shell is fixedly connected with copper bush, the top of copper bush is arranged as arc structure, the bottom right side of copper bush is embedded and is fixed with copper wire, the right end of copper wire is fixedly connected with the right side bottom of insulating shell between the wiring terminal, the wiring terminal is used for being connected with the equipment connection cable of transformer electrical test conveniently, the copper bush is used for being sleeved in transformer winding outlet end, and copper bush, copper wire and wiring terminal form the conduction work with equipment connection cable in proper order,

[0007] The left side of the insulating shell is fixedly connected with a cover plate, the right side of the cover plate is fixedly installed with a PLC controller, the left side of the cover plate is embedded and fixed with a prompt light electrically connected with the PLC controller, a threaded vertical guide driving assembly is installed on the top inner wall of the insulating shell, a drive motor is fixedly installed on the bottom inner wall of the insulating shell and connected with the threaded vertical guide driving assembly, an elastic pressure control tightening assembly is installed at the top end of the threaded vertical guide driving assembly, an insulating pressure seat is fixedly connected with the top end of the elastic pressure control tightening assembly, the top of the insulating pressure seat is provided with an arc structure and fixedly bonded with an anti-skid rubber pad, and the drive motor and the elastic pressure control tightening assembly are electrically connected with the PLC controller; the threaded vertical guide driving assembly is used to drive the elastic pressure control tightening assembly to move up and down when the drive motor is started, the elastic pressure control tightening assembly is used to drive the insulating pressure seat to elastically tighten and press the transformer winding outlet end when moving up, and the pressure value is detected and transmitted to the PLC controller, the PLC controller is used to control the drive motor to automatically turn off and control the prompt light to turn on when the pressure value reaches the preset value, so as to realize the effects of automatic elastic pressure control tightening and pressure pressing and clear indication, and ensure the stability and convenience of connection.

[0008] Preferably, the threaded vertical guide driving assembly comprises a rectangular outer tube fixedly connected to the top inner wall of the insulating shell, a rectangular rod slidably sleeved in the rectangular outer tube, the insulating shell slidably sleeved on the rectangular rod, a screw rod rotatably installed between the inner walls of the two sides of the rectangular outer tube, and the rectangular rod threadedly sleeved on the screw rod, and the bottom end of the screw rod fixedly connected with the top end of the output shaft of the drive motor.

[0009] Preferably, the elastic pressure control tightening assembly comprises a rectangular slide block, a rectangular slot is formed at the top end of the rectangular rod, the rectangular slide block is slidably sleeved in the rectangular slot, two springs are fixedly connected between the bottom of the rectangular slide block and the inner wall of the bottom of the rectangular slot, a pressure sensor is fixedly connected to the top of the rectangular slide block, the top of the pressure sensor is fixedly connected with the bottom of the insulating pressure seat, and the pressure sensor is electrically connected with the PLC controller.

[0010] Preferably, the right side of the cover plate is embedded and fixed with a storage battery in the insulating shell, and the prompt light, the drive motor and the PLC controller are electrically connected with the storage battery.

[0011] Preferably, the top and right side of the insulating shell are provided with wire holes fixedly connected with the outer side of the copper wire.

[0012] Preferably, the bottom end of the rectangular rod is provided with a threaded groove threadedly connected with the screw rod.

[0013] Preferably, the top of the terminal is provided with a threaded hole, and a press bolt is threadedly sleeved in the threaded hole.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The insulating shell, copper sleeve, driving motor, PLC controller, insulating pressure seat, threaded vertical guide driving assembly and elastic control pressure tightening assembly cooperate to automatically and elastically precisely control pressure and tighten and press when connected with the outgoing line end of the transformer winding, facilitate precise control of the fixing force, avoid the risk of disconnection due to vibration and other factors, and do not require personnel to additionally and separately perform threading work from the inside, and the spring elastic tightening method can continuously perform elastic tightening work, reduce the risk of loosening and disconnection due to vibration and other factors, and improve the connection anti-disconnection stability and convenience.

[0016] 2. The PLC controller and the indicator light cooperate to automatically and clearly indicate through the lighting method when controlling and fixing the connection, facilitating personnel to clearly understand the connection stability state during debugging work.

[0017] 3. The copper sleeve, copper wire and terminal cooperate to facilitate direct wiring work of the debugging equipment on the outside, do not directly cause wear of the equipment connection cable, and avoid the phenomenon that subsequent line replacement requires rethreading.

[0018] The utility model is provided with a series of structures, which facilitate automatic elastic precise pressure control and tightening and press when connected with the outgoing line end of the transformer winding, clearly indicate when controlling and fixing the connection, facilitate precise control of the fixing force, avoid the risk of disconnection due to vibration and other factors, do not require personnel to additionally and separately perform threading work from the inside, and continuously perform elastic tightening work through the spring elastic tightening method, reduce the risk of loosening and disconnection due to vibration and other factors, improve the connection anti-disconnection stability and convenience, and clearly indicate through the lighting of the indicator light, facilitating personnel to clearly understand the connection stability state during debugging work. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model provides a structural schematic view of a transformer electrical test auxiliary device;

[0020] Figure 2 The right view structural schematic view of Figure 1 ; and

[0021] Figure 3 This is a front sectional view of the auxiliary device for electrical testing of a transformer proposed in this utility model.

[0022] In the diagram: 1. Insulating housing; 101. PLC controller; 102. Drive motor; 103. Indicator light; 2. Copper sleeve; 201. Copper wire; 202. Terminal block; 3. Insulating base; 301. Anti-slip pad; 4. Rectangular outer tube; 401. Screw; 402. Rectangular rod; 403. Rectangular groove; 404. Spring; 405. Rectangular slider; 406. Pressure sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 3 As shown in the figure, the transformer electrical testing auxiliary device proposed in this embodiment includes an insulating shell 1, a copper sleeve 2 fixedly connected to the top of the insulating shell 1, the top of the copper sleeve 2 is set with an arc structure, a copper wire 201 is embedded and fixedly installed on the bottom right side of the copper sleeve 2, a terminal 202 is fixedly connected between the right end of the copper wire 201 and the bottom right side of the insulating shell 1, a threaded hole is opened on the top of the terminal 202, and a clamping bolt is threaded in the threaded hole. The top and right side of the insulating shell 1 are both provided with wire holes for fixed connection to the outside of the copper wire 201; the terminal 202 is provided for convenient connection with the transformer electrical testing equipment connection cable, and the copper sleeve 2 is provided for fitting on the transformer winding output end. The copper sleeve 2, copper wire 201 and terminal 202 are used to sequentially form a connection cable with the equipment for operation.

[0025] The left side of the insulating shell 1 is fixedly connected with a cover plate, the right side of the cover plate is fixedly installed with a PLC controller 101, the left side of the cover plate is embeddedly and fixedly installed with a prompt lamp 103 electrically connected with the PLC controller 101, the top inner wall of the insulating shell 1 is installed with a threaded vertical guide driving assembly, the bottom inner wall of the insulating shell 1 is fixedly installed with a driving motor 102 with an output shaft fixedly connected with the threaded vertical guide driving assembly, the top end of the threaded vertical guide driving assembly is installed with an elastic control pressure tightening assembly, the top end of the elastic control pressure tightening assembly is fixedly connected with an insulating pressure seat 3, the top of the insulating pressure seat 3 is provided in an arc-shaped structure and is adhesively and fixedly installed with an anti-skid rubber pad 301, the driving motor 102 and the elastic control pressure tightening assembly are electrically connected with the PLC controller 101, the right side of the cover plate is embeddedly and fixedly installed with a storage battery in the insulating shell 1, the prompt lamp 103, the driving motor 102 and the PLC controller 101 are electrically connected with the storage battery, thereby achieving the effect of power supply for the prompt lamp 103, the driving motor 102 and the PLC controller 101; the threaded vertical guide driving assembly is used for driving the elastic control pressure tightening assembly to move up and down when the driving motor 102 is started, the elastic control pressure tightening assembly is used for driving the insulating pressure seat 3 to elastically and tightly press and fix the transformer winding outgoing line end portion when moving up, and detecting the pressing and fixing force and the pressure value transmitted to the PLC controller 101, and the PLC controller 101 is used for controlling the driving motor 102 to automatically close and controlling the prompt lamp 103 to open when the pressure value reaches a preset value, thereby achieving the effects of automatic elastic control pressure tightening and pressing and fixing and obvious prompting, and guaranteeing the connection anti-dropping stability and convenience.

[0026] Specifically, the threaded vertical guide driving assembly comprises a rectangular outer tube 4 fixedly connected to the top inner wall of the insulating shell 1, a rectangular rod 402 slidably sleeved in the rectangular outer tube 4, and the insulating shell 1 slidably sleeved on the rectangular rod 402, wherein the top of the insulating shell 1 is provided with a rectangular guide hole slidably sleeved with the outer side of the rectangular rod 402, thereby achieving the effect of vertically sliding guide for the rectangular rod 402, a screw rod 401 rotatably installed between the inner walls of the two sides of the rectangular outer tube 4, wherein bearings are fixedly connected between the inner walls of the two sides of the rectangular outer tube 4, and the inner side of the inner ring of the bearing is fixedly connected with the outer side of the screw rod 401, thereby achieving the effect of rotatably installing the screw rod 401, the rectangular rod 402 threadedly sleeved on the screw rod 401, wherein the bottom end of the rectangular rod 402 is provided with a threaded groove threadedly connected with the screw rod 401, thereby achieving the effect of conveniently driving the rectangular rod 402 to displace up and down when the screw rod 401 rotates, and the bottom end of the screw rod 401 is fixedly connected with the top end of the output shaft of the driving motor 102; the rectangular outer tube 4, the rectangular rod 402 and the screw rod 401 are cooperated, the driving motor 102 is used for driving the screw rod 401 to rotate, and the screw rod 401 drives the rectangular rod 402 to displace up and down.

[0027] Further, the elastic pressure control tightening assembly comprises a rectangular slider 405, a rectangular groove 403 is opened at the top end of the rectangular rod 402, the rectangular slider 405 is slidably sleeved in the rectangular groove 403, two springs 404 are fixedly connected between the bottom of the rectangular slider 405 and the inner wall of the bottom of the rectangular groove 403, the top of the rectangular slider 405 is fixedly connected with a pressure sensor 406, the top of the pressure sensor 406 is fixedly connected with the bottom of the insulating pressure seat 3, and the pressure sensor 406 is electrically connected with the PLC controller 101; The rectangular slider 405, the rectangular groove 403, the spring 404 and the pressure sensor 406 are matched, and when the rectangular rod 402 moves up and down, the rectangular slider 405 is driven by the spring 404 to move up and down, the rectangular slider 405 drives the insulating pressure seat 3 to move up and down through the pressure sensor 406, wherein when moving upward to perform the pressing work, when the insulating pressure seat 3 drives the antiskid rubber pad 301 to press the outer side of the transformer winding outlet end, it is blocked and limited, the rectangular rod 402 that continues to move upward slides upward on the rectangular slider 405, and the spring 404 is compressed, the elastic force of the spring 404 in the compressed state elastically tightens the rectangular slider 405, the pressure sensor 406 elastically tightens the insulating pressure seat 3, the pressure sensor 406 detects the tightening pressure and transmits the pressure value to the PLC controller 101, when the preset pressure value is reached, the PLC controller 101 controls the driving motor 102 to be closed and controls the indicator lamp 103 to be turned on, realizes the effects of automatic elastic pressure control tightening and obvious indication, and by using the elastic tightening mode, the elastic force of the spring 404 is used to continuously perform the elastic tightening work, reduces the risk of loosening and falling off due to vibration and other factors, and improves the connection anti-loosening stability and convenience.

[0028] The use method of the embodiment is: when the transformer electrical test auxiliary device is used, the copper sleeve 2 is sleeved outside the transformer winding outlet end, the pressure value at which the drive motor 102 is closed and the prompt lamp 103 is turned on is pre-set by the PLC controller 101 according to the fixed requirements, the drive motor 102 is started in the forward direction to drive the screw rod 401 to rotate, the screw rod 401 drives the rectangular rod 402 to slide upward in the rectangular outer tube 4, the rectangular rod 402 drives the rectangular sliding block 405 to move upward through the spring 404, the rectangular sliding block 405 drives the insulation pressing seat 3 to move upward through the pressure sensor 406, when the insulation pressing seat 3 drives the anti-skid rubber pad 301 to press the transformer winding outlet end outside, it is blocked and limited, at this time, the rectangular rod 402 continues to slide upward on the rectangular sliding block 405 and compresses the spring 404, the spring 404 in the compressed state is elastically tightened by the force, the pressure sensor 406 detects the tightening pressure and transmits the pressure value to the PLC controller 101, when the preset pressure value is reached, the PLC controller 101 controls the drive motor 102 to be closed and controls the prompt lamp 103 to be turned on, realizing the effects of automatic elastic precise pressure control tightening and obvious prompt, facilitating precise control of the fixing force, avoiding the risk of disconnection due to vibration and other factors, and without the need for personnel to separately perform threading work from the inside, and using the elastic tightening mode of the spring 404, the elastic tightening work can be continuously performed, the risk of loosening and disconnection due to vibration and other factors is reduced, the connection anti-disconnection stability and convenience are improved, and the prompt lamp 103 is used to provide obvious prompt, facilitating personnel to understand the connection stability state during debugging work.

[0029] The personnel only need to connect the device connection cable for transformer electrical test with the terminal 202 externally, and perform conduction work, and the connection of the device connection cable with the terminal 202 externally facilitates personnel to operate; in addition, the pressure control and fixation in the copper sleeve 2 will not directly cause wear of the device connection cable, avoiding the phenomenon that rethreading is required due to subsequent line replacement;

[0030] When the fixation is released after use, the drive motor 102 is started in the reverse direction, and the movement direction is completely opposite to that of the forward starting drive motor 102, at this time, the rectangular rod 402 changes to move downward, the compression force on the spring 404 is released, and the insulation pressing seat 3 is sequentially driven downward by the spring 404, the rectangular sliding block 405 and the pressure sensor 406 to solve the fixation work, at this time, the pressure value detected and transmitted by the pressure sensor 406 is reduced, the PLC controller 101 controls the prompt lamp 103 to be automatically turned off when the pressure value is lower than the pre-set value, the clamping state is released, and the device connection cable can be conveniently removed.

[0031] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. An auxiliary device for electrical tests of transformers, comprising an insulating casing (1), characterized in that: The top of the insulating shell (1) is fixedly connected with a copper sleeve (2), the top of the copper sleeve (2) is provided as an arc structure, the bottom right side of the copper sleeve (2) is embeddedly and fixedly provided with a copper wire (201), and the right end of the copper wire (201) is fixedly connected with a wiring terminal (202) between the right bottom of the insulating shell (1). The left side of the insulating shell (1) is fixedly connected with a cover plate, the right side of the cover plate is fixedly provided with a PLC controller (101), the left side of the cover plate is embeddedly and fixedly provided with a prompt lamp (103) electrically connected with the PLC controller (101), a threaded vertical guide driving assembly is arranged on the top inner wall of the insulating shell (1), a driving motor (102) is fixedly arranged on the bottom inner wall of the insulating shell (1) and fixedly connected with the threaded vertical guide driving assembly, an elastic pressure control tightening assembly is arranged on the top end of the threaded vertical guide driving assembly, an insulating pressure seat (3) is fixedly connected with the top end of the elastic pressure control tightening assembly, the top of the insulating pressure seat (3) is provided as an arc structure and fixedly provided with an anti-skid rubber pad (301), and the driving motor (102) and the elastic pressure control tightening assembly are electrically connected with the PLC controller (101).

2. The auxiliary device for electrical test of transformer according to claim 1, characterized in that: The threaded vertical guide driving assembly comprises a rectangular outer tube (4) fixedly connected with the top inner wall of the insulating shell (1), a rectangular rod (402) slidably sleeved in the rectangular outer tube (4), the insulating shell (1) slidably sleeved on the rectangular rod (402), and a screw rod (401) rotatably arranged between the inner walls of the two sides of the rectangular outer tube (4), the rectangular rod (402) being threadedly sleeved on the screw rod (401), and the bottom end of the screw rod (401) being fixedly connected with the top end of the output shaft of the driving motor (102).

3. The auxiliary device for electrical test of transformer according to claim 2, characterized in that: The elastic pressure control tightening assembly comprises a rectangular sliding block (405), a rectangular slot (403) is formed in the top end of the rectangular rod (402), the rectangular sliding block (405) is slidably sleeved in the rectangular slot (403), two springs (404) are fixedly connected between the bottom of the rectangular sliding block (405) and the inner wall of the bottom of the rectangular slot (403), a pressure sensor (406) is fixedly connected with the top of the rectangular sliding block (405), the top of the pressure sensor (406) is fixedly connected with the bottom of the insulating pressure seat (3), and the pressure sensor (406) is electrically connected with the PLC controller (101).

4. The auxiliary device for electrical test of transformer according to claim 1, characterized in that: The right side of the cover plate is embeddedly and fixedly provided with a storage battery in the insulating shell (1), and the prompt lamp (103), the driving motor (102) and the PLC controller (101) are electrically connected with the storage battery.

5. The auxiliary device for electrical test of transformer according to claim 1, characterized in that: Thread holes are formed in the top and the right side of the insulating shell (1) and fixedly connected with the outside of the copper wire (201).

6. The auxiliary device for electrical test of transformer according to claim 3, characterized in that: A threaded slot is formed in the bottom end of the rectangular rod (402) and threadedly connected with the screw rod (401).

7. The auxiliary device for electrical test of transformer according to claim 1, characterized in that: A threaded hole is formed in the top of the wiring terminal (202) and threadedly sleeved with a pressing bolt.

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