High-voltage mutual inductor shell sealing mechanism

Abstract

The utility model discloses a high-voltage mutual inductor shell sealing mechanism which comprises a mutual inductor shell, an installation groove is formed in the mutual inductor shell, a high-voltage fuse is arranged in the installation groove, an epoxy resin sealing head is arranged below the high-voltage fuse, and a sealing assembly is arranged between the epoxy resin sealing head and the high-voltage fuse. A heat conduction piece is embedded in the epoxy resin sealing head, and a threaded sleeve is detachably connected to the end, penetrating out of the epoxy resin sealing head, of the heat conduction piece in a sleeving mode and connected to the inner wall of the mounting groove in a threaded mode. The heat conduction piece is embedded in the epoxy resin sealing head, heat is led out of the installation groove from the heat conduction piece, the heat dissipation effect of the mutual inductor shell is enhanced, the threaded sleeve is arranged outside the heat conduction piece in a sleeving mode, and the epoxy resin sealing head is fixed through threaded connection of the threaded sleeve and the inner wall of the installation groove. Large extrusion force between the epoxy resin sealing head and the inner wall of the mounting groove is avoided, and the epoxy resin sealing head can be conveniently pulled out of the mounting groove.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer technology, specifically to a high-voltage instrument transformer housing sealing mechanism. Background Technology

[0002] In recent years, with economic development, China's power industry has continued to grow and its installed capacity has continued to increase. The requirements for power supply reliability have become more stringent. When factors such as lightning overvoltage and line faults cause voltage transformer fuses to blow, power outages are required for replacement, which increases the downtime of distribution network automation switches. This not only seriously affects the reliability of power supply and causes power outage losses for power supply companies to replace voltage transformer fuses, but also requires disconnecting the primary circuit of the voltage transformer during live work, which seriously threatens the personal safety of on-site personnel if not handled properly.

[0003] Patent application number 202 2223188068 discloses a voltage transformer with a sealed structure, including a voltage transformer housing mounted on both sides of the top of the main unit. The housing has an internal cavity containing a high-voltage fuse, which is fixed inside the housing by screws and nuts. A silicone rubber sleeve is fitted around the bottom of the fuse, and a primary terminal is installed on the top. With this sealed voltage transformer, personnel can disconnect the high-voltage primary circuit of the voltage transformer without climbing a pole during live-line work. After the voltage transformer in the distribution network automation switch burns out, maintenance personnel can replace the high-voltage fuse from the ground without shutting down the power. This facilitates live-line fuse replacement, making it suitable for live-line work, ensuring maintenance can be performed while the power is on, solving the high-voltage fuse protection ratio matching problem, and ensuring the personal safety of on-site personnel.

[0004] Although the aforementioned patent solves the problem of replacing high-voltage fuses without power interruption, its sealing method involves an interference fit between the silicone rubber sleeve and the voltage transformer housing. This connection method results in weak heat dissipation, which is not conducive to the normal operation of the high-voltage fuse. Furthermore, it is difficult to pull the silicone rubber sleeve out of the voltage transformer housing, which is not conducive to replacing the high-voltage fuse. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage transformer housing sealing mechanism to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage transformer housing sealing mechanism, comprising: a transformer housing, an installation groove provided inside the transformer housing, a high-voltage fuse disposed in the installation groove, an epoxy resin sealing head disposed below the high-voltage fuse, a sealing assembly disposed between the epoxy resin sealing head and the high-voltage fuse, a heat-conducting element embedded inside the epoxy resin sealing head, a threaded sleeve detachably sleeved on one end of the heat-conducting element extending out of the epoxy resin sealing head, and the threaded sleeve being threadedly connected to the inner wall of the installation groove.

[0007] Furthermore, the sealing assembly includes an upper sealing sleeve, and a lower sealing sleeve is inserted inside the upper sealing sleeve.

[0008] Furthermore, the upper sleeve of the seal has a receiving groove, the inner wall of the receiving groove outlet has an inclined groove, and the top side of the lower sleeve of the seal has an inclined surface that is in close contact with the inclined groove.

[0009] Furthermore, a spring connection is provided between the upper and lower sleeves of the seal.

[0010] Furthermore, a retaining ring is provided at both the upper and lower ends of the threaded sleeve, which is engaged with the heat-conducting component.

[0011] Furthermore, a primary terminal is installed on the top of the transformer housing, the bottom of which is inserted into the mounting groove, and a pagoda spring is installed between the primary terminal and the high-voltage fuse.

[0012] The beneficial effects of the high-voltage transformer housing sealing mechanism provided by this utility model in the above technical solution are as follows:

[0013] This invention enhances the heat dissipation effect of the transformer housing by embedding a heat-conducting component inside the epoxy resin sealing head, thereby drawing heat out of the mounting groove. By setting a threaded sleeve on the outer sleeve of the heat-conducting component, the epoxy resin sealing head is fixed by the threaded connection between the threaded sleeve and the inner wall of the mounting groove, avoiding large compressive forces between the epoxy resin sealing head and the inner wall of the mounting groove, and making it easier to pull the epoxy resin sealing head out of the mounting groove.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;

[0018] Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 A schematic diagram of the sealing assembly structure provided in an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Housing; 2. Mounting groove; 3. Pagoda spring; 4. High-voltage fuse; 5. Sealing assembly; 51. Upper seal sleeve; 511. Receiving groove; 512. Slanted groove; 52. Lower seal sleeve; 521. Slanted surface; 53. Spring; 6. Epoxy resin sealing head; 7. Threaded sleeve; 71. Removal hole; 8. Heat-conducting component; 9. Snap ring; 10. Primary terminal block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Please see Figures 1-3A high-voltage transformer housing sealing mechanism includes: a transformer housing 1, an installation groove 2 inside the transformer housing 1, a high-voltage fuse 4 installed in the installation groove 2, the high-voltage fuse 4 inserted into the installation groove 2, an epoxy resin sealing head 6 below the high-voltage fuse 4, a sealing assembly 5 between the epoxy resin sealing head 6 and the high-voltage fuse 4, a heat-conducting element 8 embedded in the epoxy resin sealing head 6, the heat-conducting element 8 being made of an alloy material such as brass, the epoxy resin sealing head 6 being made of epoxy resin, the heat-conducting element 8 being integrally formed with the epoxy resin at the center of the mold, a threaded sleeve 7 being detachably sleeved on one end of the heat-conducting element 8 protruding from the epoxy resin sealing head 6, the threaded sleeve 7 being threadedly connected to the inner wall of the installation groove 2, the threaded sleeve 7 being made of ceramic material and used to insulate the heat on the heat-conducting element 8, two symmetrically arranged disassembly holes 71 being opened at the bottom of the threaded sleeve 7, allowing the threaded sleeve 7 to be rotated by inserting a screwdriver or other cylindrical object into the disassembly holes 71.

[0024] Furthermore, the sealing assembly 5 includes an upper sealing sleeve 51, a lower sealing sleeve 52 inserted inside the upper sealing sleeve 51, a receiving groove 511 inside the upper sealing sleeve 51, an inclined groove 512 on the inner wall of the outlet position of the receiving groove 511, an inclined surface 521 on the top side of the lower sealing sleeve 52, the inclined surface 521 being in close contact with the inclined groove 512, and a spring 53 connecting the upper sealing sleeve 51 and the lower sealing sleeve 52.

[0025] Specifically, when the lower sleeve 52 of the seal is pressed upward, the spring 53 is compressed, and the lower sleeve 52 of the seal is also squeezed into the upper sleeve 51 of the seal, causing the upper sleeve 51 of the seal to deform and press against the inner wall of the mounting groove 2, thereby achieving a seal for the high-voltage fuse 4 in the mounting groove 2. When the pressing force below the lower sleeve 52 of the seal is lost, under the elastic force of the spring 53, the lower sleeve 52 of the seal is squeezed out of the upper sleeve 51 of the seal, and the size of the upper sleeve 51 of the seal is restored.

[0026] Furthermore, each end of the threaded sleeve 7 is provided with a retaining spring 9 that is snapped onto the heat-conducting component 8. The threaded sleeve 7 is limited by the two retaining springs 9 snapping onto the heat-conducting component 8. The heat-conducting component 8 is provided with a vertical ridge, and the threaded sleeve 7 is slidably disposed outside the vertical ridge of the heat-conducting component 8, which prevents the threaded sleeve 7 from rotating relative to the heat-conducting component 8.

[0027] Furthermore, a primary terminal 10 is installed on the top of the transformer housing 1, and the bottom of the primary terminal 10 is inserted into the mounting groove 2. A pagoda spring 3 is provided between the primary terminal 10 and the high-voltage fuse 4. A pagoda spring 3 is installed on the top of the high-voltage fuse 4. The top of the pagoda spring 3 abuts against the top of the mounting groove 2 and is electrically connected to the bottom of the primary terminal 10. The pagoda spring 3 ensures that the top has a certain elastic space to ensure that the high-voltage fuse 4 will not hit the inner wall of the mounting groove 2 when it is installed upward.

[0028] In this utility model, reference Figures 1 to 3 When it is necessary to replace the high-voltage fuse 4, insert the columnar rod into the two disassembly holes 71 and twist it forcefully, so that the threaded sleeve 7 drives the epoxy resin sealing head 6 to disengage from the installation groove 2. Then, the sealing component 5, the high-voltage fuse 4, and the pagoda spring 3 slide out of the installation groove 2 in sequence. The staff catches them in sequence and then installs the new high-voltage fuse 4 into the installation groove 2. The pagoda spring 3, the high-voltage fuse 4, and the sealing component 5 are then inserted into the installation groove 2 in sequence. Finally, the epoxy resin sealing head 6 is inserted into the installation groove 2 and the threaded sleeve 7 is tightened, so that the epoxy resin sealing head 6 pushes the lower sealing sleeve 52 upward, which compresses the spring 53. The lower sealing sleeve 52 is squeezed into the upper sealing sleeve 51, so that the upper sealing sleeve 51 deforms, thereby completing the sealing of the high-voltage fuse 4. Similarly, if the resistance to turning the threaded sleeve 7 is too high, the heat-conducting component 8 can be cooled down, and then the heat-conducting component 8 can be rotated directly to loosen the threaded sleeve 7, and finally the epoxy resin sealing head 6 can be removed.

[0029] Finally, it should be noted that the high-voltage fuse 4, primary terminal block 10, and other electronic components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working principle above and complete the electrical connection in the order of operation of each electrical component. All of these are technologies known in the art.

[0030] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high voltage transformer housing seal mechanism, comprising: The transformer shell (1) is characterized in that: the transformer shell (1) is internally provided with a mounting groove (2), the mounting groove (2) is provided with a high-voltage fuse (4), the lower portion of the high-voltage fuse (4) is provided with an epoxy resin sealing head (6), a sealing assembly (5) is arranged between the epoxy resin sealing head (6) and the high-voltage fuse (4), the epoxy resin sealing head (6) is internally embedded with a heat-conducting piece (8), the end of the heat-conducting piece (8) that penetrates out of the epoxy resin sealing head (6) is externally detachably sleeved with a threaded sleeve (7), and the threaded sleeve (7) is threadedly connected to the inner wall of the mounting groove (2).

2. The high-voltage transformer housing sealing mechanism according to claim 1, characterized in that, The sealing assembly (5) comprises an upper sealing sleeve (51), and the upper sealing sleeve (51) is internally inserted with a lower sealing sleeve (52).

3. The high voltage transformer housing sealing mechanism of claim 1, wherein, The upper sealing sleeve (51) is internally provided with a containing groove (511), the outlet position of the containing groove (511) is internally provided with an inclined groove (512), the top side of the lower sealing sleeve (52) is internally provided with an inclined surface (521), and the inclined surface (521) is tightly attached to the inclined groove (512).

4. The high voltage transformer housing sealing mechanism of claim 1, wherein, A spring (53) is arranged between the upper sealing sleeve (51) and the lower sealing sleeve (52).

5. The high voltage transformer housing sealing mechanism of claim 1, wherein, The upper and lower ends of the threaded sleeve (7) are both provided with a clamping spring (9) that is clamped on the heat-conducting piece (8).

6. The high voltage transformer housing sealing mechanism of claim 1, wherein, The transformer shell (1) is provided on the top portion with a primary wiring terminal (10), the bottom portion of the primary wiring terminal (10) is inserted into the mounting groove (2), and the primary wiring terminal (10) is provided with a pagoda spring (3) between the primary wiring terminal (10) and the high-voltage fuse (4).

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