A test terminal tooling for transformer bushings

Abstract

The present invention belongs to the technical field of transformer manufacturing and testing, and specifically relates to a tooling for testing terminals of transformer bushings, which includes a wiring board, a fixing seat, a clamping seat, an adjusting copper sheet group, and several groups of bolts and nuts used in cooperation. The outer side of the fixing seat is fixedly connected to the wiring board, the fixing seat is hinged to the clamping seat, the adjusting copper sheet group is arranged in the inner space formed by the fixing seat and the clamping seat and includes several adjusting copper sheets stacked from the outside to the inside. Each bolt clamps the fixing seat, the clamping seat and the adjusting copper sheet group as a whole through the cooperating nuts. The present invention can arbitrarily adjust the number of copper sheets according to different size requirements to adjust the size of the installation hole of the bushing terminal, so that it can be applicable to the test requirements of most products in the factory, can conveniently conduct various tests on transformers and their bushings in the factory, save time and manpower, and at the same time facilitate the process and product flow management in the factory and save the usage cost.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer manufacturing and testing, in particular to a transformer bushing test terminal tool. Background Art

[0002] Existing transformer bushing terminals are extruded once according to predefined dimensions. Once manufactured, their dimensions are fixed and can only be used with bushings of the corresponding specifications, making them very incompatible. Different bushing specifications require a wide variety of terminal blocks. Depending on the required mounting hole diameter, terminal post height, terminal block thickness, and terminal block contact area, there can be dozens or even hundreds of terminal block specifications.

[0003] Currently, transformer factory testing relies solely on the wiring terminals provided by the bushing itself, or on temporarily borrowing wiring terminals of similar specifications from other products circulating in the factory. If the bushing itself does not have wiring terminals, or there are no readily available wiring terminals of similar specifications in the factory, additional wiring terminals have to be purchased for testing, which increases the product's manufacturing cycle and manufacturing costs. Summary of the Invention

[0004] In view of the problem that there is currently no universal test terminal that can meet the needs of bushings of various specifications, the purpose of the present invention is to provide a transformer bushing test terminal tool.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A transformer bushing test terminal fixture comprises a terminal block, a fixing seat, a clamping seat and an adjusting copper sheet assembly, wherein the upper end of the terminal block is connected to an external test terminal, the lower end is fixedly connected to the fixing seat, and one end of the fixing seat is hinged to one end of the clamping seat;

[0007] The adjusting copper sheet group is arranged in the inner space formed by the fixing seat and the clamping seat, and includes a plurality of adjusting copper sheets stacked from the outside to the inside. The outermost adjusting copper sheet is deformed and fits with the inner side surface of the fixing seat and the inner side surface of the clamping seat respectively. The innermost adjusting copper sheet is deformed and wraps around the bushing terminal. The adjusting copper sheets located in the middle are deformed together with the outermost and innermost adjusting copper sheets.

[0008] The other end of the fixing seat is connected to the other end of the clamping seat, and the adjusting copper sheet group is clamped between the fixing seat and the clamping seat.

[0009] The fixing base is divided into a wrapping edge A and a connecting edge A, and the fixing base is divided into a wrapping edge B and a connecting edge B. Each adjusting copper sheet is divided into a wrapping edge C and a connecting edge C. The outer side of the wrapping edge A is fixedly connected to the lower end of the wiring board, and the wrapping edge A is hinged to the wrapping edge B;

[0010] The outermost wrapping edge C fits with the inner side of the wrapping edge A and the inner side of the wrapping edge B respectively. The innermost wrapping edge C wraps the sleeve terminal. The wrapping edges C of the adjusting copper sheets in the middle part deform together with the wrapping edges C of the outermost and innermost adjusting copper sheets;

[0011] The connecting edge A is connected to the connecting edge B, and clamps the adjusting copper sheet group between the fixing base and the clamping base.

[0012] The present invention further provides several groups of bolts and nuts used in cooperation. Each bolt passes through the other end of the fixing base, the adjusting copper sheet group and the other end of the clamping base, and is clamped between the fixing base and the clamping base by the cooperating nuts.

[0013] A pre-locking sheet is further provided between the innermost adjusting copper sheet and the other end of the clamping base. Each bolt passes through the pre-locking sheet.

[0014] A flat washer is sleeved on each bolt. The flat washer is arranged outside the fixing base and the clamping base, and is pressed on the outer side surface of the fixing base or the clamping base by the head of the bolt or the nut.

[0015] A spring washer is sleeved on the bolt outside each flat washer. Each spring washer is pressed on the outer side surface of the adjacent flat washer by the head of the bolt or the nut.

[0016] The length dimensions of the adjusting copper sheets arranged in sequence from outside to inside decrease in sequence.

[0017] The width sizes of the fixing base, the clamping base and each adjusting copper sheet are equal.

[0018] The thickness sizes of each adjusting copper sheet are equal.

[0019] The wiring board is provided with through holes for connecting and fastening bolts of external test connection terminals.

[0020] The advantages and positive effects of the present invention are:

[0021] The test terminal tooling disclosed by the present invention is used to conveniently conduct various tests on transformers and their bushings in the factory, saving time and manpower. At the same time, it also facilitates the management of processes and product flows in the factory. The size of the mounting holes for the bushing terminal posts can be adjusted by arbitrarily adjusting the number of copper sheets according to different size requirements, making it applicable to the test requirements of the vast majority of products in the factory. At the same time, the present invention also introduces a loose-leaf structure, developing the traditional fully rigid wiring terminal into a flexible mounting movable wiring terminal, which not only increases the applicability but also makes the installation and use more convenient. In addition, since the adjusting copper sheet and the main body tooling are independent of each other and can be conveniently disassembled, the functional expansion of the test terminal tooling can be carried out by improving the copper sheet specifications or quantity, making it have potentially more extensive uses. And this test terminal tooling only needs to be manufactured once and can be reused, without the need to purchase separately each time.

[0022] The main features of the present invention are as follows:

[0023] 1. High universality. Only a few sets of the test wiring terminal tooling disclosed by the present invention need to be fixedly configured to meet the needs of all relevant tests in the factory.

[0024] 2. There is no need to confirm whether there is a suitable wiring terminal in the factory before each product test, saving production processes and labor costs and reducing the error probability.

[0025] 3. Reduces the production cycle and the risk of delayed delivery.

[0026] 4. Has reusability, reducing factory inventory backlogs and material waste.

[0027] 5. Low manufacturing cost. Its material cost is approximately equivalent to that of a single ordinary bushing terminal post.

[0028] 6. Simple and practical structure, easy to install and disassemble, easy to maintain, and difficult to damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a top view schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a left view schematic diagram of the overall structure of the present invention;

[0031] Figure 3 It is a front view schematic diagram of the structure of the fixed seat and the clamping seat hinged together of the present invention;

[0032] Figure 4 For Figure 1 The enlarged view at A of;

[0033] Figure 5 It is a front view schematic diagram of the clamping seat of the present invention;

[0034] Figure 6 It is a top view schematic diagram of the clamping seat of the present invention;

[0035] Figure 7 It is a front view schematic diagram when the adjusting copper sheet of the present invention is unfolded;

[0036] Figure 8 It is a top view schematic diagram after the adjusting copper sheet of the present invention is deformed;

[0037] Figure 9 It is a front view schematic diagram of the pre-locking piece of the present invention;

[0038] Figure 10 It is a schematic diagram of the structure at the bushing terminal before installation of the present invention;

[0039] Figure 11 It is a schematic diagram of the structure at the bushing terminal after installation of the present invention;

[0040] Figure 12 It is schematic diagram A of the structure during installation of the present invention;

[0041] Figure 13 It is schematic diagram B of the structure during installation of the present invention;

[0042] Figure 14 It is schematic diagram C of the structure during installation of the present invention;

[0043] Figure 15 It is schematic diagram D of the structure during installation of the present invention;

[0044] Figure 16 It is schematic diagram E of the structure during installation of the present invention.

[0045] In the figure: 1 is a wiring board, 101 is a through hole, 2 is a fixed seat, 201 is a wrapping edge A, 202 is a connecting edge A, 3 is a clamping seat, 301 is a wrapping edge B, 302 is a connecting edge B, 4 is an adjusting copper sheet, 401 is a wrapping edge C, 402 is a connecting edge C, 5 is a nut, 6 is a bolt, 7 is a pre-locking piece, 8 is a flat washer, ⑨ is a spring washer, 001 is a bushing terminal. Detailed implementation manners

[0046] The following will further elaborate on the present invention in conjunction with the attached Figures 1 - 16 for further details.

[0047] A transformer bushing test terminal tooling, as Figures 1 - 3As shown in the figure, it includes a wiring board 1, a fixing seat 2, a clamping seat 3, an adjusting copper sheet group, and several groups of bolts 6 and nuts 5 used in cooperation. The outer side of the fixing seat 2 is fixedly connected to the wiring board 1, and one end of the fixing seat 2 is hinged to one end of the clamping seat 3. The wiring board 1 is provided with through holes 101 for connecting and fastening external test wiring terminals. The wiring board 1 is fitted with the external test wiring terminal, and the wiring board 1 and the external test wiring terminal are fastened together through the bolts passing through the through holes 101 for testing. The fixing seat 2 and the clamping seat 3 are hinged to form a hinge structure that can rotate outward around the hinge as the center. After installation, it is closed, and the hinge also has a fastening function.

[0048] The adjusting copper sheet group is arranged in the inner space formed by the fixing seat 2 and the clamping seat 3 and includes several adjusting copper sheets 4 stacked from the outside to the inside. The outermost adjusting copper sheet 4 is deformed and respectively fits with the inner side of the fixing seat 2 and the inner side of the clamping seat 3. The innermost adjusting copper sheet 4 is deformed and wraps around the sleeve terminal 001. The adjusting copper sheets 4 in the middle part are deformed together with the outermost and innermost adjusting copper sheets 4.

[0049] Specifically, as Figures 4 - 8 and Figures 12 - 14 shown, the fixing seat 2 is divided into a wrapping edge A 201 and a connecting edge A 202, the fixing seat 3 is divided into a wrapping edge B 301 and a connecting edge B 302, and each adjusting copper sheet 4 is divided into a wrapping edge C 401 and a connecting edge C402. The outer side of the wrapping edge A 201 is fixedly connected to the lower end of the wiring board 1, and the wrapping edge A 201 is hinged to the wrapping edge B 301; the outermost wrapping edge C 401 respectively fits with the inner side of the wrapping edge A 201 and the inner side of the wrapping edge B 301, the innermost wrapping edge C 401 wraps around the sleeve terminal 001, and the wrapping edges C 401 of the adjusting copper sheets 4 in the middle part are deformed together with the wrapping edges C 401 of the outermost and innermost adjusting copper sheets 4; the connecting edge A 202, the connecting edges C 402 of each adjusting copper sheet 4, and the connecting edge B 302 are connected by bolts 6 and clamped by the nuts 5 used in cooperation. The bolts 6 pass through the connecting edge A 202, the connecting edges C 402 of each adjusting copper sheet 4, and the connecting edge B 302. In this embodiment, three groups of bolts 6 and nuts 5 used in cooperation are provided, and the axial centerlines of each bolt 6 are located in the same plane. In this embodiment, both the wrapping edge A 201 and the wrapping edge B 301 are in the shape of an open cylindrical surface, and both the connecting edge A 202 and the connecting edge B 302 are in the shape of a plane. Before installation, the adjusting copper sheet 4 is in a flat plate shape as a whole; after installation, the connecting edge C 402 part remains in a flat plate shape, and the wrapping edge C 401 is deformed into an open cylindrical surface shape.

[0050] Specifically, as Figure 4 、 Figure 9 、 Figure 15 andFigure 16 As shown, a pre-locking washer 7 is further provided between the connecting edge C 402 and the connecting edge B 302 of the innermost adjusting copper sheet 4, and each bolt 6 passes through the pre-locking washer 7. The pre-locking washer 7 plays a role of pressing the adjusting copper sheet 4 and keeping the adjusting copper sheet 4 stable during installation.

[0051] Specifically, as Figure 4 shown, a flat washer 8 is sleeved on each bolt 6. The flat washer 8 is arranged outside the fixed seat 2 and the clamping seat 3 and is pressed on the outer side surface of the fixed seat 2 or the clamping seat 3 by the head of the bolt 6 or the nut 5. A spring washer 9 is sleeved on the bolt 6 outside each flat washer 8, and each spring washer 9 is pressed on the outer side surface of the adjacent flat washer 8 by the head of the bolt 6 or the nut 5.

[0052] Specifically, as Figure 7 and Figure 8 shown, the length dimensions L of the adjusting copper sheets 4 arranged in sequence from outside to inside decrease in turn. The width sizes of the fixed seat 2, the clamping seat 3 and each adjusting copper sheet 4 are equal, the thickness sizes of each adjusting copper sheet 4 are equal, and the mounting hole sizes of each adjusting copper sheet 4 are the same. In this embodiment, a total of twenty adjusting copper sheets 4 are provided, all made of T2 pure copper material, with a thickness of 1 mm. When installing, an appropriate number of adjusting copper sheets 4 are selected according to the bushing terminal 001 to adjust the mounting hole diameter of the bushing terminal 001 to an appropriate size.

[0053] Working principle:

[0054] As Figures 12 - 16 shown, during installation, first remove the adjusting copper sheet 4, the pre-locking washer 7, the bolt 6, the nut 5, the spring washer 9 and the flat washer 8; open the hinge structure formed by the fixed seat 2 and the clamping seat 3 to 90° or more; select adjusting copper sheets 4 with appropriate specifications and numbers according to the diameter of the bushing terminal 001 and place them in the hinge structure formed by the fixed seat 2 and the clamping seat 3; use the pre-locking washer 7, the flat washer 8, the spring washer 9 and the bolt 6 to fix the adjusting copper sheet 4 to the inner side of the fixed seat 2. The pre-locking washer 7 plays a role of pressing the adjusting copper sheet 4 and keeping the adjusting copper sheet 4 stable; place the overall wiring terminal tooling with the adjusting copper sheet 4 fixed on the bushing terminal 001, close the clamping seat 3, and finally use the nut 5, the spring washer 9 and the flat washer 8 to tighten and fix it to complete the installation.

Claims

1. A transformer bushing test terminal fixture, characterized by: It comprises a wiring board (1), a fixing seat (2), a clamping seat (3) and an adjusting copper sheet group, wherein the upper end of the wiring board (1) is connected to the external test terminal, the lower end is fixed to the fixing seat (2), and one end of the fixing seat (2) is hinged to one end of the clamping seat (3); The adjusting copper sheet group is arranged in the inner space formed by the fixing seat (2) and the clamping seat (3), and includes a plurality of adjusting copper sheets (4) stacked from the outside to the inside. The outermost adjusting copper sheet (4) is deformed and fits with the inner side surface of the fixing seat (2) and the inner side surface of the clamping seat (3), respectively. The innermost adjusting copper sheet (4) is deformed and wraps around the bushing terminal (001). The adjusting copper sheets (4) located in the middle are deformed together with the outermost and innermost adjusting copper sheets (4). The other end of the fixing seat (2) is connected to the other end of the clamping seat (3), and the adjusting copper sheet group is clamped between the fixing seat (2) and the clamping seat (3); The fixing seat (2) is divided into a wrapping edge A (201) and a connecting edge A (202), the clamping seat (3) is divided into a wrapping edge B (301) and a connecting edge B (302), and each of the adjusting copper sheets (4) is divided into a wrapping edge C (401) and a connecting edge C (402), the outer side surface of the wrapping edge A (201) is fixedly connected to the lower end of the terminal board (1), and the wrapping edge A (201) is hinged to the wrapping edge B (301); The outermost wrapping edge C (401) is respectively matched with the inner side surface of the wrapping edge A (201) and the inner side surface of the wrapping edge B (301), the innermost wrapping edge C (401) wraps the bushing terminal (001), and the wrapping edges C (401) of each of the adjusting copper sheets (4) located in the middle are deformed together with the wrapping edges C (401) of the outermost and innermost adjusting copper sheets (4); The connecting edge A (202) is connected to the connecting edge B (302), and the adjusting copper sheet group is clamped between the fixing seat (2) and the clamping seat (3); A plurality of sets of bolts (6) and nuts (5) for use in combination are also provided. Each of the bolts (6) passes through the other end of the fixing seat (2), the adjusting copper plate group and the other end of the clamping seat (3), and is clamped between the fixing seat (2) and the clamping seat (3) by the nut (5) used in combination.

2. The transformer bushing test terminal fixture according to claim 1, characterized in that: A pre-locking piece (7) is further provided between the innermost adjusting copper sheet (4) and the other end of the clamping seat (3), and each of the bolts (6) passes through the pre-locking piece (7).

3. The transformer bushing test terminal fixture according to claim 1, characterized in that: A flat washer (8) is sleeved on each of the bolts (6). The flat washer (8) is arranged on the outside of the fixing seat (2) and the clamping seat (3), and is pressed against the outer surface of the fixing seat (2) or the clamping seat (3) through the head of the bolt (6) or the nut (5).

4. The transformer bushing test terminal fixture according to claim 3, characterized in that: A spring washer (9) is sleeved on the bolt (6) outside each flat washer (8), and each spring washer (9) is pressed against the outer surface of the adjacent flat washer (8) through the head of the bolt (6) or the nut (5).

5. The transformer bushing test terminal fixture according to claim 1, characterized in that: The lengths of the regulating copper sheets (4) arranged sequentially from the outside to the inside decrease sequentially.

6. The transformer bushing test terminal fixture according to claim 1, characterized in that: The width of the fixing seat (2), the width of the clamping seat (3), and the width of each of the adjusting copper sheets (4) are all equal.

7. The transformer bushing test terminal fixture according to claim 1, characterized in that: The thickness of each of the adjusting copper sheets (4) is equal.

8. The transformer bushing test terminal fixture according to claim 1, characterized in that: The terminal block (1) is provided with a through hole (101) for connecting a bolt for fastening an external test terminal.

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