High-voltage mutual inductor shell pressure monitoring device
By installing an automatic pressure relief component on the high-voltage transformer housing, the problem of rupture or explosion caused by abnormal changes in housing pressure is solved, achieving rapid pressure relief and sealing protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU JINYUYUAN ELECTRIC CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-04-17
AI Technical Summary
Existing high-voltage transformer housings cannot quickly release pressure when there are abnormal pressure changes, which can easily lead to the risk of housing rupture or explosion.
An automatic pressure relief assembly was designed, including a fixed shell, a pressure relief part, a seal, and an elastic part. Through the cooperation of the pressure relief groove and the inclined plate, automatic pressure relief is achieved to prevent external fluid from entering and ensure sealing.
When the pressure rises sharply, it automatically releases pressure to reduce the internal pressure, prevents the casing from rupturing or exploding, and ensures the normal operation of the transformer.
Smart Images
Figure CN224136776U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of instrument transformer technology, and specifically to a high-voltage instrument transformer housing pressure monitoring device. Background Technology
[0002] In high-voltage power systems, instrument transformers are typically used for measurement and relay protection purposes. Instrument transformers include voltage transformers and current transformers.
[0003] It mainly includes components such as the enclosure, the transformer body, the porcelain bushing, and the expansion joint. The transformer body is located in the enclosure, the porcelain bushing is installed on the top of the enclosure, and the expansion joint is usually installed on the top of the porcelain bushing. Insulating oil is installed inside the enclosure, the porcelain bushing, and the expansion joint. When the insulating oil in the enclosure expands due to heat, the oil flows from the enclosure to the expansion joint. When the insulating oil contracts due to cold, the oil flows from the expansion joint back to the enclosure. The transformer is usually equipped with a device for detecting the internal pressure.
[0004] The housing of an instrument transformer is usually filled with insulating oil. During long-term operation, factors such as changes in ambient temperature, internal partial discharge, and overheating may cause abnormal changes in the pressure inside the housing. Although current instrument transformers are often equipped with pressure monitoring devices, when the pressure rises rapidly, personnel cannot quickly reach the site to handle the situation, which may lead to serious accidents such as housing rupture and explosion. Utility Model Content
[0005] The purpose of this invention is to provide a high-voltage transformer housing pressure monitoring device to address the aforementioned shortcomings in the prior art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A high-voltage instrument transformer housing pressure monitoring device includes an instrument transformer, a connecting pipe connected to a housing on the instrument transformer, an automatic pressure relief assembly connected to the end of the connecting pipe, the automatic pressure relief assembly including a fixed shell fixedly connected to the end of the connecting pipe, a pressure relief part slidably disposed inside the fixed shell, a sealing element disposed between the pressure relief part and the fixed shell, a plurality of pressure relief grooves being formed on the fixed shell, the plurality of pressure relief grooves being equidistantly disposed in the circumferential direction of the fixed shell, an elastic part being disposed between the pressure relief part and the fixed shell, the elastic part causing the pressure relief part to press the sealing element against the fixed shell to seal the connecting pipe.
[0008] Furthermore, the pressure relief part includes an annular plate slidably connected to the fixed shell, one end of the annular plate is fixedly connected to a cover plate, and the elastic part is disposed between the cover plate and the fixed shell, so that the other end of the annular plate presses the seal against the fixed shell.
[0009] Furthermore, multiple inclined plates are fixedly arranged in the circumferential direction of the circumferential plate, and the multiple inclined plates are arranged in a one-to-one correspondence with multiple pressure relief grooves. When the pressure relief part abuts against the fixed shell under the action of the elastic part, the inclined plate seals the corresponding pressure relief groove.
[0010] Furthermore, the pressure relief groove includes a first groove and a second groove that are interconnected at their ends. The other end of the first groove extends between the fixed shell and the inclined plate, and the other end of the second groove is in communication with the air.
[0011] Furthermore, the pressure relief section also includes a sealing ball disposed inside a guide cylinder on the cover plate, the sealing ball being positioned on the connecting pipe under the action of gravity.
[0012] Furthermore, the cover plate is provided with an arc-shaped groove that is adapted to the sealing ball.
[0013] Furthermore, the elastic part is a compression spring.
[0014] The beneficial effects of the high-voltage transformer housing pressure monitoring device provided by this utility model in the above technical solution are as follows:
[0015] 1. Through the automatic pressure relief component, when the internal pressure of the transformer housing suddenly increases, the oil and gas inside the housing move through the connecting pipe to the pressure relief section, pushing the pressure relief section towards the fixed shell and compressing the elastic part. This allows the oil and gas to flow out through multiple pressure relief grooves, thereby reducing the internal pressure of the housing. When the internal pressure returns to normal, the pressure relief section, under the action of the elastic part, re-seals the connecting pipe, preventing external fluids from entering the housing and affecting the operation of the transformer. This device can automatically relieve pressure when the internal pressure of the transformer rises sharply, avoiding the problem of the transformer housing rupture or explosion due to pressure.
[0016] 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.
[0017] 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
[0018] 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.
[0019] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;
[0020] Figure 2 A schematic diagram of the structural connecting pipe and automatic pressure relief assembly provided in an embodiment of this utility model;
[0021] Figure 3 This is a schematic diagram of the exploded structure provided for an embodiment of the present utility model;
[0022] Figure 4 This is a cross-sectional structural schematic diagram provided for an embodiment of the present utility model;
[0023] Figure 5 This is a partially enlarged structural diagram of embodiment A of the present utility model;
[0024] Figure 6 This is a schematic diagram of the pressure relief section provided in an embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Current transformer; 2. Connecting pipe; 3. Automatic pressure relief assembly; 31. Fixed housing; 32. Pressure relief section; 321. Circumferential plate; 322. Cover plate; 323. Inclined plate; 324. Arc groove; 325. Guide cylinder; 33. Seal; 34. Pressure relief groove; 341. First slot; 342. Second slot; 35. Elastic part; 4. Sealing ball; Detailed Implementation
[0027] 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.
[0028] Please see Figure 1-6 A high-voltage transformer housing pressure monitoring device includes a transformer 1. A connecting pipe 2 is connected to a housing on the transformer 1. An automatic pressure relief assembly 3 is connected to the end of the connecting pipe 2. The automatic pressure relief assembly 3 includes a fixed shell 31 fixedly connected to the end of the connecting pipe 2. A pressure relief part 32 is slidably disposed inside the fixed shell 31. A sealing element 33 is disposed between the pressure relief part 32 and the fixed shell 31. A plurality of pressure relief grooves 34 are formed on the fixed shell 31 and are equidistantly arranged in the circumferential direction of the fixed shell 31. An elastic part 35 is disposed between the pressure relief part 32 and the fixed shell 31. The elastic part 35 causes the pressure relief part 32 to press the sealing element 33 against the fixed shell 31 to seal the connecting pipe 2.
[0029] Furthermore, the pressure relief part 32 includes an annular plate 321 slidably connected to the fixed shell 31. One end of the annular plate 321 is fixedly connected to a cover plate 322. The elastic part 35 is disposed between the cover plate 322 and the fixed shell 31, so that the other end of the annular plate presses the seal 33 against the fixed shell 31.
[0030] Furthermore, a plurality of inclined plates 323 are fixedly arranged in the circumferential direction of the circumferential plate 321, and the plurality of inclined plates 323 are arranged in a one-to-one correspondence with a plurality of pressure relief grooves 34. When the pressure relief part 32 abuts against the fixed shell 31 under the action of the elastic part 35, the inclined plate 323 seals the corresponding pressure relief groove 34.
[0031] Furthermore, the pressure relief groove 34 includes a first groove 341 and a second groove 342 that are connected to each other at their ends. The other end of the first groove 341 extends into the space between the fixed shell 31 and the inclined plate 323, and the other end of the second groove 342 is connected to the air.
[0032] When the pressure relief section 32 separates from the fixed shell 31 under the action of the oil-gas mixture in the box, it flows out sequentially through the first slot 341 and the second slot 342.
[0033] When the pressure relief part 32 abuts against the fixed shell 31 under the action of the elastic part 35, the sealing member 33 pressed against the fixed shell 31 by the circumferential plate 321 forms the first seal. At this time, the inclined plate 323 abuts against the second slot 342 to form the second seal, so as to prevent external impurities from entering the fixed shell 31 and affecting the effect of the first seal.
[0034] Furthermore, the pressure relief section 32 also includes a sealing ball 4 disposed within a guide cylinder 325 on the cover plate 322. The sealing ball 4 is positioned on the connecting pipe 2 under the action of gravity. It is understood that the port of the connecting pipe 2 is upward-facing, so that the sealing ball 4 abuts against the port of the connecting pipe 2 under the action of gravity. The port of the connecting pipe 2 has a sealing groove adapted to the sealing ball 4 to improve the sealing effect.
[0035] The oil-gas mixture inside the housing first pushes the sealing ball 4 upward, causing the sealing ball 4 to move along the guide cylinder 325 toward the pressure relief part 32. The oil-gas mixture enters between the fixed shell 31 and the pressure relief part 32, thereby initially reducing the pressure inside the housing.
[0036] Furthermore, the cover plate 322 is provided with an arc-shaped groove 324 that is adapted to the sealing ball 4.
[0037] Furthermore, the elastic part 35 is a compression spring. A limiting groove is provided on the cover plate 322, and the end of the compression spring is disposed in the limiting groove to prevent the compression spring from moving between the fixed shell 31 and the cover plate 322, thus affecting the reset effect.
[0038] Working principle: When the internal pressure of the housing suddenly increases, the oil and gas inside the housing move to the sealing ball 4 through the connecting pipe 2 and push the sealing ball 4 upward, so that the sealing ball 4 moves along the guide cylinder 325 towards the pressure relief part 32. The oil-gas mixture enters between the fixed shell 31 and the pressure relief part 32, thereby initially reducing the pressure inside the housing. The oil-gas mixture continues to move, pushing the circumferential plate 321 and the cover plate 322 towards the fixed shell 31 and compressing the compression spring. The oil-gas mixture flows outward through the first slot 341 and the second slot 342 in sequence, thereby reducing the pressure inside the housing. When the internal pressure of the housing returns to normal, under the reset action of the compression spring, the pressure relief part 32 re-seals the connecting pipe 2 to prevent external fluid from entering the housing and affecting the operation of the current transformer 1.
[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. 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 pressure monitoring device comprising a transformer (1), characterized in that: The transformer (1) is connected to a housing with a connecting pipe (2). The end of the connecting pipe (2) is connected to an automatic pressure relief assembly (3). The automatic pressure relief assembly (3) includes a fixed housing (31) fixedly connected to the end of the connecting pipe (2). A pressure relief part (32) is slidably arranged inside the fixed housing (31). A sealing element (33) is provided between the pressure relief part (32) and the fixed housing (31). A plurality of pressure relief grooves (34) are provided on the fixed housing (31). The plurality of pressure relief grooves (34) are equidistantly arranged in the circumferential direction of the fixed housing (31). An elastic part (35) is provided between the pressure relief part (32) and the fixed housing (31). The elastic part (35) causes the pressure relief part (32) to press the sealing element (33) onto the fixed housing (31) to seal the connecting pipe (2).
2. The high voltage transformer housing pressure monitoring device of claim 1, wherein, The pressure relief part (32) includes an annular plate (321) slidably connected to the fixed shell (31). One end of the annular plate (321) is fixedly connected to a cover plate (322). The elastic part (35) is disposed between the cover plate (322) and the fixed shell (31) so that the other end of the annular plate presses the seal (33) onto the fixed shell (31).
3. The high-voltage transformer housing pressure monitoring device according to claim 2, characterized in that, The circumferential plate (321) is fixedly provided with multiple inclined plates (323) in the circumferential direction. The multiple inclined plates (323) are provided in correspondence with multiple pressure relief grooves (34). When the pressure relief part (32) abuts against the fixed shell (31) under the action of the elastic part (35), the inclined plate (323) seals the corresponding pressure relief groove (34).
4. The high voltage transformer housing pressure monitoring device of claim 3, wherein, The pressure relief groove (34) includes a first groove (341) and a second groove (342) that are connected to each other at their ends. The other end of the first groove (341) extends between the fixed shell (31) and the inclined plate (323), and the other end of the second groove (342) is connected to the air.
5. The high voltage transformer housing pressure monitoring device of claim 2, wherein, The pressure relief section (32) also includes a sealing ball (4) inside a guide tube (325) disposed on the cover plate (322), and the sealing ball (4) is located on the connecting pipe (2) under the action of gravity.
6. The high voltage transformer housing pressure monitoring device of claim 5, wherein, The cover plate (322) has an arc-shaped groove (324) that is adapted to the sealing ball (4).
7. The high voltage transformer housing pressure monitoring device of claim 1, wherein, The elastic part (35) is a compression spring.