CN215806571U - Transformer with pressure release valve - Google Patents
Transformer with pressure release valve Download PDFInfo
- Publication number
- CN215806571U CN215806571U CN202122271116.7U CN202122271116U CN215806571U CN 215806571 U CN215806571 U CN 215806571U CN 202122271116 U CN202122271116 U CN 202122271116U CN 215806571 U CN215806571 U CN 215806571U
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- valve
- casing
- pressure
- transformer
- relief valve
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Abstract
The utility model discloses a transformer with a pressure release valve, which is good in sealing performance and adjustable in pressure threshold value. The following scheme is adopted: include the casing and establish oil inlet pipe, high-pressure terminal and the low pressure terminal of casing upper end, the casing upper end is equipped with the relief valve rather than the inner chamber intercommunication, the relief valve includes the valve body and installs case in the valve body, the valve body includes the main part and sets up the outer screw socket of main part lower extreme, through outer screw socket with casing threaded connection, the case pass through the lateral wall first annular location step with the second annular location step location fit of valve body inside wall, just be equipped with first sealing washer on the first annular location step, the lower extreme lateral wall and the center of case are equipped with the pressure release hole of intercommunication, the upper end of case is solid portion, the solid portion top is equipped with reset spring.
Description
Technical Field
The present invention relates to a transformer.
Background
The pressure relief valve is used for protecting an oil immersed transformer, namely, when a fault occurs in the oil tank of the transformer, oil in the oil tank is decomposed and gasified to generate a large amount of gas, the pressure in the oil tank is rapidly increased, and if the pressure is not released in time, the oil tank of the transformer is deformed and even bursts. The traditional pressure relief valve is shown as the Chinese utility model patent with the name of "oil immersed transformer with relief valve" and the publication number of "CN 203397840U", including the valve casing, install case in the valve casing and install the spring on the case. Such pressure relief valves have the disadvantages of: 1. the sealing performance is very poor, and oil in the oil tank is easy to leak; 2. the magnitude of the pressure threshold of the pressure relief cannot be adjusted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a transformer with a pressure relief valve, which has good sealing performance and adjustable pressure threshold.
In order to achieve the purpose, the utility model adopts the following scheme: include the casing and establish advance oil pipe, high-pressure terminal and low pressure terminal, its characterized in that of casing upper end: the casing upper end is equipped with the relief valve rather than the inner chamber intercommunication, the relief valve includes the valve casing and installs case in the valve casing, the valve casing lower extreme is equipped with outer screw thread, through outer screw thread with casing threaded connection, the case pass through the lateral wall first annular location step with the second annular location step location fit of valve casing inside wall, just be equipped with first sealing washer on the first annular location step, the lower extreme lateral wall and the center of case are equipped with the pressure release hole of intercommunication, the upper end of case is solid portion, the solid portion top is equipped with reset spring.
The transformer with the pressure release valve is characterized in that: the valve casing upper end is equipped with interior screw thread, threaded connection has pressure adjustment nut in the interior screw thread, pressure adjustment nut center is equipped with first through-hole.
The transformer with the pressure release valve is characterized in that: and a second sealing ring is arranged on the lower end surface of the valve shell.
The transformer with the pressure release valve is characterized in that: and a third sealing ring is arranged at the included angle between the outer screw port and the valve shell.
The transformer with the pressure release valve is characterized in that: the valve is characterized in that a positioning boss is arranged in the inner thread of the valve casing, a second through hole is formed in the positioning boss, and the upper end of the reset spring is fixed on the positioning boss.
The transformer with the pressure release valve is characterized in that: the valve casing is hexagon nut structure.
The transformer with the pressure release valve is characterized in that: the welding of casing upper end has the frame of protecting, advance oil pipe, high-pressure terminal and low pressure terminal, relief valve and all install protect on the frame.
The transformer with the pressure release valve is characterized in that: the first through hole is a hexagonal through hole.
The transformer with the pressure release valve has the advantages that: 1. the sealing performance after installation can be greatly improved through the specific valve shell and valve core structures and the design of multiple sealing rings; 2. the pressure of the return spring is adjusted through the pressure adjusting nut, so that the pressure threshold value is adjusted.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a transformer with pressure relief valves according to the present invention;
FIG. 2 is a cross-sectional view of a pressure relief valve of the present invention;
fig. 3 is a cross-sectional view of the valve cartridge of the present invention.
Detailed Description
As shown in fig. 1 to 3, the transformer with the pressure relief valve of the present invention includes a housing 1, and an oil inlet pipe 2, a high voltage terminal 3 and a low voltage terminal 4 provided at an upper end of the housing 1. And a pressure release valve a communicated with the inner cavity of the shell is arranged at the upper end of the shell 1. The relief valve a comprises a valve housing 5 and a valve core 6 movably mounted at the lower end of an inner cavity of the valve housing 5. The lower extreme of valve casing 5 is equipped with outer screw 8, through outer screw 8 with 1 threaded connection of casing, outer screw 8 is the screw thread screw connection portion outside. And a cavity which is communicated up and down is arranged in the valve shell 5 and the outer screw port 8. The valve housing 5 is screwed to the housing 1 via the external screw 8. The valve core 6 is matched with a second annular positioning step 12 on the inner side wall of the valve casing 5 in a positioning mode through a first annular positioning step 11 on the outer side wall, and a first sealing ring 13 is arranged on the first annular positioning step 11 to play a sealing role. The pressure relief valve is characterized in that the side wall and the center of the lower end of the valve core 6 are provided with communicated pressure relief holes 14, the upper end of the valve core 6 is provided with a solid part 15, and a return spring 16 is arranged above the solid part 15. In a natural state, the valve core 6 and the valve housing 5 are kept sealed through the return spring 16, when the pressure in the housing 1 is greater than the pressure threshold of the pressure release valve, the valve core 6 is jacked up, and air pressure flows outwards through the pressure release hole, so that the pressure release effect is achieved.
Preferably, the valve housing 5 is provided at an upper end thereof with an internal screw 9, and the internal screw 9 is a threaded connection portion having an internal thread. The internal thread of the internal screw port 9 is connected with a pressure adjusting nut 10, and a first through hole 21 is formed in the center of the pressure adjusting nut 10. The pressure of the return spring is changed by adjusting the pressure adjusting nut 10 up and down, so that the adjustment of the pressure threshold value is realized. The first through hole 21 is desirably a hexagonal through hole so that the pressure adjusting nut 10 can be adjusted by a hexagonal wrench.
Preferably, a second sealing ring 17 is arranged on the lower end surface of the valve casing 5, and a third sealing ring 18 is arranged at an included angle between the external screw port 8 and the valve casing 5, so as to improve the sealing performance after the connection between the valve casing 5 and the casing 1.
Preferably, a positioning boss 19 is arranged in the inner screw port 9 of the valve housing 5, a second through hole 23 is arranged on the positioning boss 19, and the upper end of the return spring 16 is fixed on the positioning boss 19 to fix the return spring 16.
Preferably, the valve housing 5 is a hexagon nut structure so as to be conveniently installed by means of a hexagon wrench.
Preferably, the welding of 1 upper end of casing has the frame 22 of protecting, advance oil pipe 2, high-pressure terminal 3 and low-pressure terminal 4, relief valve a and all install on the frame 22 of protecting, in order to improve 1's intensity of casing is with convenient advance oil pipe 2, high-pressure terminal 3 and low-pressure terminal 4, the installation of relief valve 5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.
Claims (8)
1. The utility model provides a transformer with relief valve, includes casing (1) and establishes advance oil pipe (2), high-pressure terminal (3) and low-voltage terminal (4), its characterized in that of casing (1) upper end: casing (1) upper end is equipped with relief valve (a) rather than the inner chamber intercommunication, relief valve (a) include valve casing (5) and install case (6) in valve casing (5), valve casing (5) lower extreme is equipped with outer screw thread mouth (8), through outer screw thread mouth (8) with casing (1) threaded connection, case (6) through the lateral wall first annular location step (11) with second annular location step (12) location fit of valve casing (5) inside wall, just be equipped with first sealing washer (13) on first annular location step (11), the lower extreme lateral wall and the center of case (6) are equipped with pressure release hole (14) of intercommunication, the upper end of case (6) is real core (15), real core (15) top is equipped with reset spring (16).
2. The transformer with pressure relief valve of claim 1 wherein: screw (9) in valve casing (5) upper end is equipped with, interior screw (9) female connection has pressure adjusting nut (10), pressure adjusting nut (10) center is equipped with first through-hole (21).
3. The transformer with pressure relief valve of claim 1 wherein: and a second sealing ring (17) is arranged on the lower end surface of the valve shell (5).
4. The transformer with pressure relief valve of claim 1 wherein: and a third sealing ring (18) is arranged at the corner between the outer screw port (8) and the valve casing (5).
5. The transformer with pressure relief valve of claim 2, wherein: be equipped with location boss (19) in interior screw port (9) of valve casing (5), be equipped with second through-hole (23) on location boss (19), reset spring (16)'s upper end is fixed on location boss (19).
6. The transformer with pressure relief valve of claim 1 wherein: the valve casing (5) is of a hexagon nut structure.
7. The transformer with pressure relief valve of claim 1 wherein: the welding of casing (1) upper end has protected frame (22), advance oil pipe (2), high-pressure terminal (3) and low pressure terminal (4), relief valve (a) and all install protect on frame (22).
8. The transformer with pressure relief valve of claim 2, wherein: the first through hole (21) is a hexagonal through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122271116.7U CN215806571U (en) | 2021-09-18 | 2021-09-18 | Transformer with pressure release valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122271116.7U CN215806571U (en) | 2021-09-18 | 2021-09-18 | Transformer with pressure release valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215806571U true CN215806571U (en) | 2022-02-11 |
Family
ID=80164462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122271116.7U Active CN215806571U (en) | 2021-09-18 | 2021-09-18 | Transformer with pressure release valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215806571U (en) |
-
2021
- 2021-09-18 CN CN202122271116.7U patent/CN215806571U/en active Active
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