Magnetic isolation bolt for large current impedance in impact generator test

Abstract

The utility model discloses a magnetic isolation bolt for large current impedance in an impact generator test, which comprises an impedance, a support is arranged on the outer side of the impedance, the support comprises a plurality of pieces of H steel I which are arranged in parallel at intervals from top to bottom, and one end parts of the plurality of pieces of H steel are jointly provided with H steel II which is vertically arranged; one end part of the H-shaped steel extends between parallel wall surfaces of the H-shaped steel II, and a bolt assembly penetrates through the wall surfaces of the H-shaped steel I and the H-shaped steel II and is locked; the bolt assembly structurally comprises a sleeve, and a bolt penetrates through the sleeve and then is provided with a nut in a locked mode. The gaskets and the base plates are respectively arranged between the two ends of the sleeve and the head parts of the bolts and between the two ends of the sleeve and the nuts, so that support steel structure connection is realized by the bolts, the gaskets and the nuts, electrostatic magnetic field isolation of the support steel structure is realized by combining the sleeve with the base plates, electrostatic magnetic field interference during test is effectively reduced, and partial discharge risk is reduced; the high-voltage sensitive test device is especially suitable for a high-voltage sensitive environment, and is good in practicability.

Description

Technical Field

[0001] This utility model relates to the technical field of impact generator testing facilities, and in particular to a magnetically shielding bolt for high current impedance in impact generator testing. Background Technology

[0002] Impulse generators are devices used to conduct impulse high-voltage and high-current tests on equipment such as high-voltage circuit breakers, high-voltage switches, and transformers. The operating characteristic of impulse generators is that the entire operating condition is in a transient process of sudden short circuit. Each test is equivalent to a sudden short circuit at the output port of a conventional generator.

[0003] In existing technologies, the support connections of impedance chambers are all constructed using ordinary bolt assemblies, which possess magnetic properties. During high-voltage, high-current short-circuit tests, the presence of electrostatic magnetic fields allows these fields to be easily conducted through the bolt connections, causing electromagnetic interference. This can lead to arcing at the impedance chamber support connections, affecting the stability of the high-voltage equipment and posing certain safety hazards. Furthermore, it may also cause malfunctions in the integrated protection system, inaccurate signal acquisition, and ultimately, test failure. Utility Model Content

[0004] To address the aforementioned issues, this application provides a reasonably structured magnetic shielding bolt for high current impedance in impulse generator tests, thereby effectively reducing interference from electrostatic magnetic fields during testing and helping to ensure the smooth progress of the test. It is particularly suitable for high-voltage sensitive environments and has good practicality.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A magnetically shielding bolt for high current impedance in impulse generator tests includes an impedance, a bracket mounted on the outside of the impedance, the bracket including multiple H-beams arranged parallel from top to bottom, and vertically arranged H-beams mounted at the ends of the multiple H-beams; the ends of the H-beams extend into the parallel walls of the H-beams and are locked with bolt assemblies through the walls of the H-beams and H-beams.

[0007] The bolt assembly has the following structure: it includes a sleeve, and a bolt passes through the sleeve and is secured with a nut; washers and gaskets are respectively installed between the two ends of the sleeve and the bolt head and the nut.

[0008] As a further improvement to the above technical solution:

[0009] The outer walls of H-steel one are attached to the inner walls of H-steel two, and the locking bolt assembly passes through the single wall of H-steel two and the single wall of H-steel one from the outside to the inside.

[0010] A gasket is press-fitted between the outer wall of H-steel one and the inner wall of H-steel two.

[0011] The third gasket is made of a non-magnetic material.

[0012] The pads include pad one and pad two, which are respectively attached to the outer wall surfaces on both sides of H-steel, and the gaskets include gasket one and gasket two, which are respectively attached to the outer wall surfaces of the corresponding pads.

[0013] The pad is a square structure with a side length larger than the diameter of the pad.

[0014] The pad has a circular hole in the center for the end of the sleeve to extend into.

[0015] Both the sleeve and the gasket are made of non-magnetic materials.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention connects the steel structure of the support frame using bolts, washers, and nuts, while simultaneously isolating the steel structure from electrostatic and magnetic fields using sleeves and pads. This effectively reduces interference from electrostatic and magnetic fields during testing, minimizes the risk of partial discharge, and helps ensure the smooth progress of the test. It is particularly suitable for high-voltage sensitive environments and has good practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation of H-steel one and H-steel two in the bracket of this utility model.

[0019] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 This is a schematic diagram of the bolt assembly of this utility model.

[0021] Figure 4 This is an exploded view of the bolt assembly of this utility model.

[0022] Among them: 1. H-beam one; 2. Bolt assembly; 3. H-beam two; 4. Impedance; 5. Washer three;

[0023] 21. Bolt; 22. Washer 1; 23. Gasket 1; 24. Sleeve; 25. Gasket 2; 26. Washer 2; 27. Nut. Detailed Implementation

[0024] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2As shown, the magnetic isolation bolt for high current impedance in the impulse generator test in this embodiment includes an impedance 4. A bracket is installed on the outside of the impedance 4. The bracket includes multiple H-steels 1 arranged in parallel from top to bottom. The ends of the multiple H-steels 1 are jointly installed with vertically arranged H-steels 2 3. The ends of the H-steels 1 extend into the parallel wall surfaces of the H-steels 2 3 and are locked with bolt assemblies 2 through the walls of the H-steels 1 and H-steels 2 3.

[0026] like Figure 3 and Figure 4 As shown, the structure of the bolt assembly 2 is as follows: it includes a sleeve 24, and a bolt 21 passes through the sleeve 24 and is locked with a nut 27; washers and pads are respectively installed between the two ends of the sleeve 24 and the head of the bolt 21 and the nut 27.

[0027] In this embodiment, while the support steel structure is connected by bolts 21, washers and nuts 27, the electrostatic magnetic field isolation of the support steel structure is achieved by sleeve 24 combined with pad, which effectively reduces the interference of electrostatic magnetic field during the test and reduces the risk of partial discharge.

[0028] The outer walls of H-steel 1 are attached to the inner walls of H-steel 2 3. The bolt assembly 2 is installed from the outside to the inside, passing through the single wall of H-steel 2 3 and the single wall of H-steel 1, thereby effectively ensuring the structural reliability of the connection between H-steel 1 and H-steel 2 3 via the bolt assembly 2.

[0029] In this embodiment, after the end of H-steel 1 extends into the inner wall of H-steel 2 3, it can be locked using four sets of bolt assemblies 2 arranged front-to-back and top-to-bottom, such as... Figure 2 As shown.

[0030] A gasket 35 is press-fitted between the outer wall of H-steel 1 and the inner wall of H-steel 23.

[0031] Gasket 35 is made of non-magnetic material.

[0032] In this embodiment, the setting of shim 3 5 helps to ensure the magnetic shielding effect at the joint of H steel 1 and H steel 2 3.

[0033] The pads include pad 23 and pad 25, which are respectively attached to the outer wall surfaces on both sides of H-steel 23, and the gaskets include gasket 22 and gasket 26, which are respectively attached to the outer wall surfaces of the corresponding pads.

[0034] The pad is a square structure with a side length larger than the diameter of the pad.

[0035] In this embodiment, the pad effectively isolates H-steel 23 from the head of bolt 21 and nut 27, ensuring magnetic shielding.

[0036] The center of the pad has a circular hole for the end of the sleeve 24 to extend into; thus effectively ensuring the magnetic shielding effect at the connection between the sleeve 24 and the pad, and ensuring the magnetic shielding effect of H-steel 1 and H-steel 2 3 at the connection of the bolt assembly 2.

[0037] Both the sleeve 24 and the pad are made of non-magnetic materials.

[0038] In this embodiment, the non-magnetic material can be a material that can block or reduce the penetration of magnetic fields, including but not limited to materials with low magnetic permeability such as graphite, quartz, plastic, and epoxy resin.

[0039] The installation method of this utility model is as follows:

[0040] During installation, drill holes at corresponding positions on H-steel 1 and H-steel 23, fit the end of H-steel 1 to the side of H-steel 23, and place shim 35 at the mating surface; adjust the height of H-steel 1 relative to H-steel 23 so that the corresponding holes are aligned front to back; sequentially install shim 122, shim 123, and sleeve 24 on bolt 21, then pass sleeve 24 from the outside to the inside through the mating wall of H-steel 23 and H-steel 1, and then install shim 25 and shim 26 on bolt 21, and lock nut 27 to the tail of bolt 21 and tighten.

[0041] This invention effectively reduces the interference of electrostatic magnetic field at the bolt connection of the support during the test and reduces the risk of partial discharge, which helps to ensure the stability and smooth progress of the test. It is especially suitable for high-voltage sensitive environments and has good practicality.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0043] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A magnetically shielding bolt for high current impedance in impulse generator tests, comprising an impedance (4), wherein a bracket is mounted on the outside of the impedance (4), characterized in that: The bracket includes multiple H-beams (1) arranged parallel to each other from top to bottom, and H-beams (3) are installed at the ends of the multiple H-beams (1) together. The ends of the H-beams (1) extend into the parallel walls of the H-beams (3) and are locked with bolt assemblies (2) through the walls of the H-beams (1) and H-beams (3). The structure of the bolt assembly (2) is as follows: it includes a sleeve (24), and a bolt (21) passes through the sleeve (24) and is then locked with a nut (27); a washer and a pad are respectively installed between the two ends of the sleeve (24) and the head of the bolt (21) and the nut (27).

2. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 1, characterized in that: The outer walls of H-steel one (1) are attached to the inner walls of H-steel two (3) and the bolt assembly (2) is installed from the outside to the inside, passing through the single wall of H-steel two (3) and the single wall of H-steel one (1).

3. The magnetically shielding bolt for high current resistance in impulse generator tests as described in claim 1 or 2, characterized in that: A gasket (5) is press-fitted between the outer wall of H-steel one (1) and the inner wall of H-steel two (3).

4. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 3, characterized in that: The gasket three (5) is made of non-magnetic material.

5. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 1, characterized in that: The pads include pad one (23) and pad two (25) respectively attached to the outer wall surfaces on both sides of H steel two (3), and the gaskets include gasket one (22) and gasket two (26) respectively attached to the outer wall surfaces of the corresponding pads.

6. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 1, characterized in that: The pad is a square structure with a side length larger than the diameter of the pad.

7. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 1, characterized in that: The center of the pad has a circular hole for the end of the sleeve (24) to extend into.

8. The magnetically shielding bolt for high current impedance in impulse generator tests as described in claim 1, characterized in that: Both the sleeve (24) and the pad are made of non-magnetic materials.

Images