Combined pressure-resistant device

Abstract

The invention relates to the field of power frequency voltage withstanding tests, in particular to a combined voltage withstanding device, which comprises a test transformer part comprising a first voltage transformation assembly and a second voltage transformation assembly, and the second voltage transformation assembly is stacked above the first voltage transformation assembly to form insertion connection; the protection part sleeves the first voltage transformation assembly and the second voltage transformation assembly and is used for playing a protection role; the two independent small transformers are connected in series, so that the overall size is greatly reduced, meanwhile, the overall weight is split, transportation is more convenient, and use convenience is improved; the two groups of transformers are stacked and connected in series, so that the voltage is multiplied, the transformer can be used for withstand voltage experiments of more than 35KV, meanwhile, the on-site wiring number is effectively reduced, and the safety is improved; and the protection part can support the two groups of transformers to avoid collapse and can limit the mounting position, so that the contact butt joint is more accurate, and the condition of poor contact is avoided.

Description

Technical Field

[0001] The invention relates to the field of power frequency withstand voltage test, in particular to a combined withstand voltage device. Background Art

[0002] Power frequency withstand voltage test device is a basic test equipment for power stations, power supply and distribution systems and other users. It is used to test the insulation strength of various electrical products, electrical components, insulation materials, etc. under specified voltage to measure the overvoltage capability. The traditional cascade test method requires two test transformers of the same specification.

[0003] The test transformer in the prior art is designed as a special-shaped structure. When conducting a withstand voltage test above 35kV, the device is large in size and difficult to transport. At the same time, since two test transformers of the same specification are required, the wiring at the test site is complicated. More than ten test lines need to be connected between the two test transformers and between the test transformer and the voltage regulator. The test wiring is complicated and it is easy to connect the wrong lines, resulting in damage to the test equipment and a high safety risk.

[0004] For this purpose, a combined pressure-resistant device is proposed. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the present invention aims to solve the technical problems in the prior art that the test transformer is large in size and has too many connecting wires.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a combined pressure-resistant device, comprising:

[0008] A test transformer part, comprising a first transformer assembly and a second transformer assembly, wherein the second transformer assembly is stacked on top of the first transformer assembly to form a plug-in connection;

[0009] The protection part is sleeved on the outside of the first transformer assembly and the second transformer assembly to play a protective role.

[0010] As a preferred solution of the combined voltage-withstanding device described in the present invention, the first transformer assembly includes a first transformer, a first high-voltage insulator is installed on the top of the first transformer, and a first high-voltage electrode is arranged at the central part of the first high-voltage insulator.

[0011] As a preferred solution of the combined voltage-withstanding device of the present invention, the bottom of the first transformer is provided with an oil tank bottom plate, and the bottom of the oil tank bottom plate is provided with a high-voltage series coil component;

[0012] An oil tank upper plate is installed on the top of the first transformer, and a lead terminal is installed on the top of the oil tank upper plate.

[0013] As a preferred solution of the combined voltage-withstanding device described in the present invention, a lead groove is provided on one side of the first transformer.

[0014] As a preferred solution of the combined pressure-resistant device described in the present invention, empty grooves used in conjunction with the lead grooves are provided on the outer sides of the oil tank upper plate and the oil tank lower bottom plate.

[0015] As a preferred solution of the combined voltage-withstanding device described in the present invention, the first high-voltage insulator is made of ceramic material.

[0016] As a preferred solution of the combined voltage-withstanding device described in the present invention, the second transformer assembly includes a second transformer, a second high-voltage insulator is installed on the top of the second transformer, and a second high-voltage electrode is installed in the center of the second high-voltage insulator.

[0017] As a preferred solution of the combined voltage-withstand device described in the present invention, the second high-voltage electrode is in contact with the high-voltage series coil component.

[0018] As a preferred solution of the combined pressure-resistant device described in the present invention, the protection part includes an upper shell and a lower shell located at the bottom of the upper shell, and a seal is provided at the bottom of the lower shell.

[0019] As a preferred solution of the combined pressure-resistant device described in the present invention, wherein: a wiring through hole is opened on one side of the upper shell and the lower shell, and hanging holes are symmetrically opened on the surfaces of the upper shell and the lower shell.

[0020] The beneficial effects of the present invention are as follows: by connecting two separate small transformers in series, the overall volume is greatly reduced, and the overall weight is split, which is more convenient for transportation and improves the convenience of use;

[0021] The two sets of transformers are stacked and connected in series to double the voltage, which can cope with the withstand voltage test of more than 35KV. At the same time, it effectively reduces the number of on-site wiring and improves safety.

[0022] The protection part can not only support the two sets of transformers to prevent collapse, but also limit the installation position, making their contact docking more accurate and avoiding poor contact. At the same time, it has an insulating effect to protect the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 The figure is a schematic diagram of the overall structure of a combined pressure-resistant device of the present invention.

[0025] Figure 2 The present invention is a schematic structural diagram of a test transformer part in a combined voltage-withstand device.

[0026] Figure 3 The present invention is a schematic structural diagram of a first transformer assembly in a combined voltage-resistant device.

[0027] Figure 4 The present invention is a schematic structural diagram of a high-voltage series coil component in a combined voltage-resistant device.

[0028] Figure 5 The present invention is a schematic structural diagram of a first transformer assembly in a combined voltage-resistant device.

[0029] Figure 6 The figure is a schematic structural diagram of the middle protection part of a combined pressure-resistant device of the present invention. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Furthermore, 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] Reference Figure 1-2 , this embodiment provides a combined pressure-resistant device, including:

[0036] The test transformer part 100 includes a first transformer assembly 101 and a second transformer assembly 102. The second transformer assembly 102 is stacked on the first transformer assembly 101 to form a plug-in connection.

[0037] Specifically, the first transformer assembly 101 and the second transformer assembly 102 are of the same model, and the first transformer assembly 101 and the second transformer assembly 102 are overlapped and plugged in, which simplifies on-site wiring and improves safety. At the same time, after being disassembled, the overall weight is divided into two independent parts, which makes it easy to carry.

[0038] Example 2

[0039] Reference Figure 3-5 This embodiment is different from the first embodiment in that: the first transformer assembly 101 includes a first transformer 101a, a first high-voltage insulator 101b is installed on the top of the first transformer 101a, and a first high-voltage electrode 101c is arranged in the central part of the first high-voltage insulator 101b.

[0040] An oil tank bottom plate 101d is installed at the bottom of the first transformer 101a, and a high-voltage series coil 101e is installed at the bottom of the oil tank bottom plate 101d;

[0041] An oil tank upper plate 101f is installed on the top of the first transformer 101a, and a lead terminal 101g is installed on the top of the oil tank upper plate 101f. The lead terminal 101g is provided in multiple groups for connecting other power equipment.

[0042] A lead groove 101h is provided on one side of the first transformer 101a, and empty grooves used in conjunction with the lead groove 101h are provided on the outer sides of the oil tank upper plate 101f and the oil tank lower bottom plate 101d, which can facilitate wiring, reduce the problem of messy wiring, ensure cleanliness of the site, and improve the safety of the operation.

[0043] The first high-voltage insulator 101b is made of ceramic material, thereby effectively avoiding accidents.

[0044] The second transformer assembly 102 includes a second transformer 102a. A second high-voltage insulator 102b is installed on the top of the second transformer 102a. A second high-voltage electrode 102c is installed in the center of the second high-voltage insulator 102b.

[0045] The second transformer assembly 102 is connected in series with the first transformer assembly 101 via the second high-voltage electrode 102c and the high-voltage series coil 101e.

[0046] Specifically, the high-voltage series coil 101e also includes a series outer plate 101e-1, the inner circle of the series outer plate 101e-1 is wrapped and installed with an intermediate insulator 101e-2, the inner circle of the intermediate insulator 101e-2 is wrapped and installed with a series inner plate 101e-3, and the surfaces of the series inner plate 101e-3 and the series outer plate 101e-1 are both provided with series contact grooves 101e-4;

[0047] The upper end of the second high-voltage electrode 102c is provided with two joints, which are respectively a high-voltage test coil electrode column and a series-pole coil electrode column.

[0048] Working process: When in use, first place the second transformer assembly 102 vertically in the working area, then lift the first transformer assembly 101 to the top of the second transformer assembly 102. When the first transformer assembly 101 is perpendicular to the second transformer assembly 102, slowly lower it. When lowering it, make sure that the two connectors in the second transformer assembly 102 are aligned with the two series contact slots 101e-4 at the bottom of the first transformer assembly 101 to complete the stacking and series connection. After the combination, the voltage-resistant device has stronger performance and is easy to operate.

[0049] Example 3

[0050] Reference Figure 6 , this embodiment is different from the above embodiment in that: the combined pressure-resistant device provided in this embodiment further includes:

[0051] The protection part 200 is sleeved on the outside of the first transformer assembly 101 and the second transformer assembly 102 to play a protective role;

[0052] The protection part 200 includes an upper shell 201 and a lower shell 202 located at the bottom of the upper shell 201;

[0053] Specifically, the upper shell 201 and the lower shell 202 are both cylindrical and made of insulating material. Through the design of the cylinder, the first transformer assembly 101 and the second transformer assembly 102 can be effectively limited. They can be directly placed in order for precise docking, which simplifies the docking steps and increases the convenience of using the device. At the same time, the first transformer assembly 101 and the second transformer assembly 102 can also be supported and insulated to avoid affecting the external environment.

[0054] The bottom of the lower shell 202 is provided with a seal 203 to increase the ground contact area and avoid the problem of collapse;

[0055] A wiring through hole 204 is provided on one side of the upper shell 201 and the lower shell 202, which facilitates the passage of wires. The surfaces of the upper shell 201 and the lower shell 202 are symmetrically provided with hanging holes 205, which can facilitate the machine to lift the device through the hanging holes 205, thereby increasing the convenience of the device.

[0056] An outwardly protruding limiting ring 206 is fixed to the bottom of the upper shell 201 , and the outer diameter of the limiting ring 206 is consistent with the inner diameter of the lower shell 202 , so that the upper shell 201 can be inserted into the upper end of the lower shell 202 through the limiting ring 206 to form a connection.

[0057] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A combined pressure-resistant device, characterized in that: include: A test transformer part (100) comprises a first transformer assembly (101) and a second transformer assembly (102), wherein the second transformer assembly (102) is stacked on top of the first transformer assembly (101) to form a plug-in connection; The protection part (200) is sleeved on the outside of the first transformer assembly (101) and the second transformer assembly (102) to play a protective role.

2. The combined pressure-resistant device according to claim 1, characterized in that: The first transformer assembly (101) comprises a first transformer (101a), a first high-voltage insulator (101b) is installed on the top of the first transformer (101a), and a first high-voltage electrode member (101c) is arranged at the center of the first high-voltage insulator (101b).

3. The combined pressure-resistant device according to claim 2, characterized in that: An oil tank bottom plate (101d) is installed at the bottom of the first transformer (101a), and a high-voltage series coil component (101e) is installed at the bottom of the oil tank bottom plate (101d); An oil tank upper plate (101f) is installed on the top of the first transformer (101a), and a lead terminal (101g) is installed on the top of the oil tank upper plate (101f).

4. The combined pressure-resistant device according to claim 3, characterized in that: A lead groove (101h) is provided on one side of the first transformer (101a).

5. The combined pressure-resistant device according to claim 4, characterized in that: Empty grooves for use with the lead wire grooves (101h) are arranged on the outer sides of the oil tank upper plate (101f) and the oil tank lower bottom plate (101d).

6. The combined pressure-resistant device according to claim 5, characterized in that: The first high-voltage insulator (101b) is made of ceramic material.

7. The combined pressure-resistant device according to claim 6, characterized in that: The second transformer assembly (102) comprises a second transformer (102a), a second high-voltage insulator (102b) is installed on the top of the second transformer (102a), and a second high-voltage electrode (102c) is installed in the center of the second high-voltage insulator (102b).

8. The combined pressure-resistant device according to claim 7, characterized in that: The second high-voltage electrode (102c) is in contact with the high-voltage series coil member (101e).

9. The combined pressure-resistant device according to claim 8, characterized in that: The protection part (200) comprises an upper shell (201) and a lower shell (202) located at the bottom of the upper shell (201), and a seal (203) is provided at the bottom of the lower shell (202).

10. The combined pressure-resistant device according to claim 9, characterized in that: A wiring through hole (204) is provided on one side of the upper shell (201) and the lower shell (202), and hanging holes (205) are symmetrically provided on the surfaces of the upper shell (201) and the lower shell (202).

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