A method and device for short-circuiting a transformer for electrical tests

Abstract

The application discloses a kind of transformer electrical test short-circuit method and device, this method includes the following steps by installing clamping tool to copper wire both ends;By sending the clamping tool of copper wire one end to the bushing of transformer;By controlling the clamping tool activity clamping bushing;By sending the clamping tool of copper wire other end to another bushing clamping.The transformer electrical test short-circuit method and device, copper wire both ends are connected with clamping tool, and it is elevated with support tool to the bushing of transformer clamping fixed short-circuit.

Description

Technical Field

[0001] This invention relates to the technical field of transformer electrical testing, and more particularly to a method and apparatus for short-circuiting transformer electrical testing. Background Technology

[0002] When conducting electrical tests on transformers, insulation tests require short-circuiting the phases of the transformer. Currently, it is common to use bare copper wire to short-circuit the phases. However, the bushings of large transformers are quite tall, requiring a long bare copper wire to be used for short-circuiting. This involves climbing up to the top of the bushing one phase at a time to perform the short-circuiting. The long bare copper wire is difficult to wind up, and the winding may not be tight enough, resulting in poor short-circuiting effect. This increases the difficulty of the test personnel's work and also increases the risk of falling from height. Therefore, this invention provides a method and device for short-circuiting transformers in electrical testing. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problem that existing transformer electrical tests require climbing to the top of the bushing one phase at a time to perform short circuits, this invention is proposed.

[0005] Therefore, one of the objectives of this invention is to provide a method for short-circuiting a transformer during electrical testing, which aims to solve the problem that existing large transformers have high bushing heights, requiring phase-by-phase climbing to the top of the bushing during short-circuiting.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a short-circuit method for electrical testing of a transformer, the method comprising the following steps: installing clamping tools on both ends of a copper wire; sending the clamping tool at one end of the copper wire to the bushing of the transformer; clamping the bushing by controlling the movement of the clamping tool; and sending the clamping tool at the other end of the copper wire to another bushing for clamping.

[0007] As a preferred embodiment of the transformer electrical test short-circuit method of the present invention, the copper wire is equipped with a winding tool to wind up the copper wire and prevent it from drooping.

[0008] As a preferred embodiment of the transformer electrical test short-circuit method of the present invention, the bottom end of the clamping tool is equipped with a splicable support tool, and the support tool of appropriate length is assembled according to the height of the bushing.

[0009] The beneficial effect of this transformer electrical test short-circuit method is that the two ends of the copper wire are connected to the clamping tool, and the supporting tool is used to raise it to clamp and fix the transformer bushing for short-circuiting.

[0010] The second objective of this invention is to provide a transformer electrical test short-circuit device, which aims to solve the problem that existing large transformers have high bushing heights, requiring phase-by-phase climbing to the top of the bushing during short-circuiting.

[0011] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a transformer electrical test short-circuit device, comprising: an installation unit including two installation plates and support rods respectively disposed at the bottom end of the installation plates; a clamping unit including two conductive blocks respectively disposed on the two installation plates, a clamping assembly disposed on the conductive blocks, and a driving assembly disposed on the support rods and connected to the clamping assembly; and a connecting unit including a winding assembly disposed on one of the installation plates and a connecting wire disposed on the winding assembly and connected to the two conductive blocks.

[0012] As a preferred embodiment of the transformer electrical test short-circuit device of the present invention, the clamping assembly includes a sliding column disposed on the conductive block, a clamping plate disposed on the sliding column, and a first elastic member disposed between the clamping plate and the end of the sliding column.

[0013] As a preferred embodiment of the transformer electrical test short-circuit device of the present invention, the driving assembly includes a safety ring block disposed on the support rod, a first connecting rod disposed in the mounting block, a connecting rope disposed between the first connecting rod and the clamping plate, and a driving component disposed at the bottom end of the support rod and abutting against the bottom end of the first connecting rod.

[0014] In a preferred embodiment of the transformer electrical test short-circuit device of the present invention, the winding assembly includes two fixed plates disposed on the mounting plate, a winding roller disposed between the fixed plates and connected to the connecting wire, and a limiting member disposed on the mounting plate and cooperating with the winding roller; the connecting wire includes a wire body with one end passing through the inside of the winding rollers inside the two fixed plates and exiting from the winding rollers outside the two fixed plates, a connecting ring disposed outside the wire body, and a connecting frame disposed between the connecting ring and the conductive block; the other end of the wire body is connected to another conductive block.

[0015] As a preferred embodiment of the transformer electrical test short-circuit device of the present invention, the limiting component includes a limiting plate disposed on the winding roller, a support plate disposed on the fixed plate, a limiting rod disposed on the support plate, a limiting block disposed at the end of the limiting rod, a second elastic element disposed between the limiting block and the support plate, and an elastic rope disposed between the bottom end of the limiting block and the driving assembly.

[0016] As a preferred embodiment of the transformer electrical test short-circuit device of the present invention, it further includes: an extension assembly, the extension assembly including a plurality of extension rods disposed at the bottom end of the support rod, and a plurality of adjacent extension rods being inserted into each other, disposed on the extension rods, and connected to the bottom end of the first connecting rod, adjacent connecting parts being connected end to end, and a driving part disposed at the bottom end of the extension rods and abutting against the connecting parts; the connecting part includes a first mounting ring disposed on the extension rods, and a second connecting rod disposed on the first mounting rings.

[0017] As a preferred embodiment of the transformer electrical test short-circuit device of the present invention, the driving component includes a mounting base, a slide rod disposed on the mounting base, a driving bolt disposed on the mounting base, and a pressure plate disposed at the end of the slide rod and rotatably connected to the end of the driving bolt.

[0018] The beneficial effects of this transformer electrical test short-circuit device are as follows: Two clamping assemblies are raised by two support rods, and the pressure plate in the clamping assembly cooperates with the conductive block to clamp and fix the transformer bushing. The conductive block contacts the transformer bushing, and the bushings of each phase at the top of the transformer are short-circuited through the connecting wire between the two conductive blocks to carry out electrical tests. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of the transformer electrical test short-circuit method and device of the present invention.

[0021] Figure 2 This is a schematic diagram of the winding assembly structure of the transformer electrical test short-circuit method and device of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of region A in the middle.

[0023] Figure 4 This is a schematic diagram of the drive component structure of the transformer electrical test short-circuit method and device of the present invention.

[0024] Figure 5 This is a schematic diagram of the combined structure of the support rod and extension rod of the transformer electrical test short-circuit method and device of the present invention.

[0025] Figure 6 This is a schematic diagram of the combined structure of the two extension rods of the transformer electrical test short-circuit method and device of the present invention. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] Example 1

[0031] Reference Figure 1 The first embodiment of the present invention provides a method for short-circuiting a transformer for electrical testing, which includes the following steps:

[0032] S1: By installing clamping tools at both ends of the copper wire.

[0033] S2: By sending the clamping tool at one end of the copper wire to the bushing of the transformer.

[0034] S3: Clamp the sleeve by controlling the movement of the clamping tool.

[0035] S4: The clamping tool at the other end of the copper wire is sent to another sleeve for clamping.

[0036] The clamping tool is equipped with a splicable support tool at its bottom. The support tool of appropriate length can be assembled according to the height of the sleeve. The support tools can be spliced ​​to change the extension height of the top clamping tool, making it convenient to clamp and fix with sleeves of different heights.

[0037] Furthermore, the copper wire is equipped with a winding tool for winding the copper wire. Under normal conditions, the copper wire is wound in the winding tool. After one of the clamping tools is clamped and fixed to the sleeve, the other support tool is moved to drive the clamping tool to move. At the same time, the winding tool unwinds the copper wire. Unwinding stops when it reaches the other sleeve. At the same time, the clamping tool is fixed to the sleeve, which can prevent the copper wire from hanging down due to excessive length.

[0038] Example 2

[0039] Reference Figure 1-4 The second embodiment of the present invention provides a transformer electrical test short-circuit device, including an installation unit 100, a clamping unit 200 and a connecting unit 300. The installation unit 100 installs the clamping unit 200 and the connecting unit 300 and raises them. The clamping unit 200 clamps and fixes the bushing of the transformer. The connecting unit 300 connects them to each other for electrical testing.

[0040] The mounting unit 100 includes two mounting plates 101 and support rods 102 respectively disposed at the bottom end of the mounting plates 101.

[0041] The clamping unit 200 includes two conductive blocks 201 respectively disposed on the two mounting plates 101, a clamping assembly 202 disposed on the conductive blocks 201, and a driving assembly 203 disposed on the support rod 102 and connected to the clamping assembly 202.

[0042] The clamping assembly 202 includes a slide post 202a disposed on the conductive block 201, a clamping plate 202b disposed on the slide post 202a, and a first elastic member 202c disposed between the clamping plate 202b and the end of the slide post 202a. The end of the slide post 202a is provided with a plate for mounting the first elastic member 202c. The first elastic member 202c can be made of a spring and a metal sheet.

[0043] The drive assembly 203 includes a safety ring block 203a disposed on the support rod 102, a first connecting rod 203b disposed in the mounting block, a connecting rope 203c disposed between the first connecting rod 203b and the clamping plate 202b, and a drive component 203d disposed at the bottom end of the support rod 102 and abutting against the bottom end of the first connecting rod 203b. The bottom end of the first connecting rod 203b is L-shaped.

[0044] The driving component 203d includes a mounting base 203d-1 rotatably connected to the support rod 102, a slide rod 203d-2 disposed on the mounting base 203d-1, a driving bolt 203d-3 disposed on the mounting base 203d-1, and a pressure plate 203d-4 disposed at the end of the slide rod 203d-2 and rotatably connected to the end of the driving bolt 203d-3. The pressure plate 203d-4 is hooked to the bottom end of the first connecting rod 203b.

[0045] Specifically, by rotating the drive bolt 203d-3, the pressure plate 203d-4 and the slide rod 203d-2 are driven to slide downward. The pressure plate 203d-4 abuts against the first connecting rod 203b, pulling the first connecting rod 203b downward and stretching the first elastic element 202c, and pulling the connecting rope 203c and the clamping plate 202b. The clamping plate 202b moves and abuts against the conductive block 201, which can clamp and fix the sleeve.

[0046] The connecting unit 300 includes a winding assembly 301 disposed on one of the mounting plates 101, and a connecting wire 302 disposed on the winding assembly 301 and connected to the two conductive blocks 201.

[0047] The winding assembly 301 includes two fixing plates 301a disposed on the mounting plate 101, a winding roller 301b disposed between the fixing plates 301a and connected to the connecting wire 302, and a limiting member 301c disposed on the mounting plate 101 and cooperating with the winding roller 301b.

[0048] The connecting wire 302 includes a wire body 302a, one end of which passes through the inside of the winding rollers 301b inside the two fixed plates 301a and extends out from the winding rollers 301b outside the two fixed plates 301a; a connecting ring 302b disposed on the outside of the wire body 302a; and a connecting frame 302c disposed between the connecting ring 302b and the conductive block 201; the other end of the wire body 302a is connected to another conductive block 201.

[0049] The limiting component 301c includes a limiting plate 301c-1 disposed on the take-up roller 301b, a support plate 301c-2 disposed on the fixed plate 301a, a limiting rod 301c-3 slidably disposed on the support plate 301c-2, and a limiting block 301c-4 disposed at the end of the limiting rod 301c-3. The limiting block 301c-4 is located between the limiting rod 301c-3 and the take-up roller 301b. The other end of the limiting rod 301c-3 is provided with a limiting plate. The second elastic element 301c-5 between the limiting block 301c-4 and the support plate 301c-2, and the elastic rope 301c-6 disposed between the bottom end of the limiting block 301c-4 and the drive assembly 203, wherein the elastic rope 301c-6 is fixedly connected to the top end of the first connecting rod 203b in the drive assembly 203, the second elastic element 301c-5 can be supported by springs and metal sheets, and the elastic force of the elastic rope 301c-6 is greater than the elastic force of the second elastic element 301c-5;

[0050] The drive assembly 203 can pull the elastic rope 301c-6 downward, move the limiting block 301c-4, and stretch the second elastic element 301c-5 to move the limiting block 301c-4 so that it abuts against the limiting plate 301c-1, thereby fixing the take-up roller 301b and preventing it from rotating.

[0051] During use: By lifting the support rod 102 without the take-up roller 301b, the clamping plate 202b and the conductive block 201 are positioned on both sides of the sleeve. The mounting base 203d-1 is rotated so that its pressure plate 203d-4 is engaged with the bottom end of the first connecting rod 203b. By rotating the drive bolt 203d-3, the pressure plate 203d-4 moves downwards, stretching the first connecting rod 203b, thereby pulling the connecting rope 203c. This causes the clamping plate 202b to move relative to the conductive block 201. Contact is made to facilitate clamping the end of the sleeve. Then, another support rod 102 is picked up and moved to another sleeve. During the movement, the connecting wire 302 will be pulled. When the connecting wire 302 is pulled out, it may rotate due to its own weight. At this time, the mounting base 203d-1 is rotated so that its pressure plate 203d-4 is hooked with the bottom end of the first connecting rod 203b. By rotating the drive bolt 203d-3, the pressure plate 203d-4 is moved downwards. Extend the first connecting rod 203b to slightly pull the connecting rope 203c, simultaneously pulling the elastic rope 301c-6, moving the limiting block 301c-4, and stretching the second elastic element 301c-5. This moves the limiting block 301c-4 so that it abuts against the limiting plate 301c-1, thereby fixing the take-up roller 301b and preventing it from rotating. Then, release the connecting wire 302 at intervals according to the required length, driving the bolt 203d-3 by forward and reverse rotation. During the interval laying of the wire, when it reaches the second sleeve, continue to rotate the drive bolt 203d-3, causing the pressure plate 203d-4 to move downward and stretch the first connecting rod 203b, which in turn pulls the connecting rope 203c, causing the clamping plate 202b to move and contact the conductive block 201, clamping the end of the sleeve. During clamping, the limiting block 301c-4 and the limiting rod 301c-3 will move to the end. Then, the elastic rope 301c-6 is stretched without interfering with the operation of the clamping plate 202b.

[0052] Example 3

[0053] Reference Figure 1-6 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the bottom end of the support rod 102 further includes an extension assembly 103. The extension assembly 103 includes a plurality of extension rods 103a disposed at the bottom end of the support rod 102, and a plurality of adjacent extension rods 103a are inserted into each other and disposed on the extension rods 103a, and connected to the bottom end of the first connecting rod 203b. Adjacent connecting parts 103b are connected end to end, and a driving part 203d disposed at the bottom end of the extension rods 103a and abutting against the connecting parts 103b. The mounting seat 203d-1 in the driving part 203d is rotatably connected to the extension rods 103a.

[0054] The connecting component 103b includes a first mounting ring 103b-1 disposed on the extension rod 103a, and a second connecting rod 103b-2 disposed on the first mounting ring 103b-1;

[0055] The second connecting rod 103b-2 is L-shaped at both ends. When multiple extension rods 103a are inserted into each other, the multiple second connecting rods 103b-2 on them are hooked together end to end. The top of the second connecting rod 103b-2 on the extension rod 103a that is inserted into the bottom end of the support rod 102 is hooked to the bottom end of the first connecting rod 203b.

[0056] The remaining structure is the same as that in Example 2.

[0057] During use, when the sleeve is high, select an appropriate number of extension rods 103a for insertion and assembly according to the sleeve height. Connect the second connecting rods 103b-2 between the extension rods 103a. Insert the top extension rod 103a into the support rod 102. Connect the top of the second connecting rod 103b-2 of the top extension rod 103a to the bottom of the first connecting rod 203b. Simultaneously, rotate the pressure plate 203d-4 in the drive component 203d on the support rod 102 and the extension rod 103a out of the first connecting rod 203b or the second connecting rod. At the bottom of 103b-2, by lifting the extension rod 103a, the clamping plate 202b and the conductive block 201 are positioned on both sides of the sleeve. Rotate the mounting seat 203d-1 on the bottom extension rod 103a so that its pressure plate 203d-4 is engaged with the bottom of the second connecting rod 103b-2. By rotating the drive bolt 203d-3, the pressure plate 203d-4 is moved downward to stretch the first connecting rod 203b, thereby pulling the connecting rope 203c. This causes the clamping plate 202b to move and contact the conductive block 201, facilitating the clamping of the sleeve end.

[0058] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0059] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A transformer electrical test short-circuit device, characterized in that: include, The mounting unit (100) includes two mounting plates (101) and support rods (102) respectively disposed at the bottom end of the mounting plates (101). The clamping unit (200) includes two conductive blocks (201) respectively disposed on the two mounting plates (101), a clamping assembly (202) disposed on the conductive blocks (201), and a drive assembly (203) disposed on the support rod (102) and connected to the clamping assembly (202); and, The connecting unit (300) includes a winding assembly (301) disposed on one of the mounting plates (101) and a connecting wire (302) disposed on the winding assembly (301) and connected to the two conductive blocks (201). The clamping assembly (202) includes a slide post (202a) disposed on the conductive block (201), a clamping plate (202b) disposed on the slide post (202a), and a first elastic member (202c) disposed between the clamping plate (202b) and the end of the slide post (202a). The drive assembly (203) includes a mounting block (203a) disposed on the support rod (102), a first connecting rod (203b) disposed in the mounting block (203a), a connecting rope (203c) disposed between the first connecting rod (203b) and the clamping plate (202b), and a drive component (203d) disposed at the bottom end of the support rod (102) and abutting against the bottom end of the first connecting rod (203b). The winding assembly (301) includes two fixed plates (301a) disposed on the mounting plate (101), a winding roller (301b) disposed between the fixed plates (301a) and connected to the connecting wire (302), and a limiting member (301c) disposed on the mounting plate (101) and cooperating with the winding roller (301b). The connecting wire (302) includes a wire body (302a) with one end passing through the inside of the take-up rollers (301b) inside the two fixed plates (301a) and extending out from the take-up rollers (301b) outside the two fixed plates (301a), a connecting ring (302b) disposed on the outside of the wire body (302a), and a connecting frame (302c) disposed between the connecting ring (302b) and the conductive block (201); the other end of the wire body (302a) is connected to another conductive block (201); The limiting component (301c) includes a limiting plate (301c-1) disposed on the take-up roller (301b), a support plate (301c-2) disposed on the fixed plate (301a), a limiting rod (301c-3) disposed on the support plate (301c-2), a limiting block (301c-4) disposed at the end of the limiting rod (301c-3), a second elastic element (301c-5) disposed between the limiting block (301c-4) and the support plate (301c-2), and an elastic rope (301c-6) disposed between the bottom end of the limiting block (301c-4) and the drive assembly (203). It also includes an extension assembly (103), which includes a plurality of extension rods (103a) disposed at the bottom end of the support rod (102), and a plurality of adjacent extension rods (103a) being inserted into each other, disposed on the extension rods (103a), and connected to the bottom end of the first connecting rod (203b), with adjacent connecting parts (103b) being connected end to end, and a driving part (203d) disposed at the bottom end of the extension rods (103a) and abutting against the connecting parts (103b). The connecting component (103b) includes a first mounting ring (103b-1) disposed on the extension rod (103a) and a second connecting rod (103b-2) disposed on the first mounting ring (103b-1). The drive component (203d) includes a mounting base (203d-1), a slide rod (203d-2) disposed on the mounting base (203d-1), a drive bolt (203d-3) disposed on the mounting base (203d-1), and a pressure plate (203d-4) disposed at the end of the slide rod (203d-2) and rotatably connected to the end of the drive bolt (203d-3).

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