Stop valve for quick oil taking type transformer
By designing a quick oil extraction transformer shut-off valve and using a rotating oil nozzle to control the oil emission of transformer, the existing shut-off valve is solved, which easily leads to injection phenomena during the transformer oil emission process, and achieves safe and reliable oil emissions and effective utilization of resources.
Patent Information
- Application Number
- CN202421605300.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The existing shut-off valves are prone to injecting during the oil discharge of transformer, which poses safety risks and wastes transformer oil.
A quick oil extraction transformer shut-off valve is designed. The transformer oil is directed into the oil nozzle by rotating the oil nozzle and discharged to the outside world through the oil nozzle. The oil output is controlled to be within a very small range to avoid spraying. At the same time, the oil pressure is reduced first when discharging oil, and then discharged the plug to prevent splashing.
It effectively avoids the injection of transformer oil onto staff during the discharge process, eliminates safety hazards, and avoids waste caused by the splash of transformer oil on the outside.
Smart Images
Figure CN222783021U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a stop valve, in particular to a stop valve for a quick oil-taking transformer. Background Art
[0002] The stop valve is a valve that uses a valve disc to open and close. In actual use, the stop valve will be applied to the stop valve to control the flow of transformer oil in the transformer. The transformer oil can not only act as an insulator, but also as a coolant to dissipate heat. It can also effectively extinguish arcs and effectively improve the arc extinguishing performance of the medium. However, the transformer oil will deteriorate after long-term use, which can easily cause the transformer chassis to rust. Therefore, the transformer oil needs to be replaced regularly. In the actual use of the transformer oil, it is very difficult to judge whether the transformer oil has deteriorated without discharging the transformer oil, so that the service life of the transformer oil cannot be fully utilized, resulting in higher replacement costs. The traditional way to drain the transformer oil is to unscrew the plug in the water outlet joint originally screwed to the stop valve to discharge the transformer oil. When the transformer oil inside the transformer is full, the oil pressure is large, and the transformer oil will be directly sprayed out. Not only is it easy to spray on the staff, there are certain safety hazards, but it will also cause part of the transformer oil to splash out to the outside world and be wasted. Summary of the invention
[0003] The utility model aims to solve the existing technical problem and provide a quick oil-taking type transformer stop valve, which can not only detect whether the transformer oil is deteriorated at any time to fully utilize the service life of the transformer oil, but also avoid the occurrence of spraying when the transformer oil is discharged.
[0004] The technical solution adopted by the utility model to solve the above technical problems is:
[0005] The utility model discloses a quick-take oil-taking stop valve for transformers, comprising a valve body, a water inlet joint arranged on the front side of the valve body, and a water outlet joint arranged on the rear side of the valve body, a plug is screwed in the water outlet joint, a water baffle is arranged in the valve body, an opening and closing hole is arranged in the center of the water baffle, the water inlet joint is connected with the water outlet joint through the opening and closing hole, a valve flap is arranged in the valve body for blocking and sealing the upper end opening of the opening and closing hole, a valve stem is arranged in the center of the valve flap, a valve cover matching the upper end port of the valve body is arranged, the upper end of the valve stem passes upward to the outside of the valve cover and is provided with a hand wheel, an external joint matching the water inlet joint is screwed in the front end thereof, an oil taking seat is arranged on the right side wall of the front part of the external joint ; An adjusting hole is provided at the center of the right end face of the oil extraction seat; an oil drain hole communicating with the internal space of the external joint is provided at the center of the bottom of the adjusting hole; an internal thread is provided on the inner wall of the adjusting hole; an oil nozzle threadedly connected with the internal thread is provided in the adjusting hole; a sealing head is provided at the center of the left end face of the oil nozzle, and the left end face of the sealing head shields and seals the right end opening of the oil drain hole; an oil passage gap is provided between the outer wall of the sealing head and the inner wall of the adjusting hole; an oil inlet hole communicating with the internal space of the oil nozzle is provided on one side of the outer wall of the sealing head; a plugging cover matching with it is threadedly connected to the outside of the oil extraction seat; the right end of the oil nozzle passes to the right to the outside of the adjusting hole and passes into the plugging cover.
[0006] A sealing ring is arranged between the outer edge of the left end surface of the sealing head and the adjusting hole, and the sealing ring encloses the right end opening of the oil drain hole; the sealing ring is made of rubber.
[0007] The right end of the oil nozzle is provided with an annular limiting portion; a moving distance is provided between the left side wall of the limiting portion and the right end surface of the oil extraction seat.
[0008] The outer wall of the sealing head is provided with a guide cone surface which is wider on the left and narrower on the right, and the outer end opening of the oil inlet hole is located on the right end of the guide cone surface.
[0009] An annular limiting step is arranged on the inner wall of the left part of the blocking cover; and an annular gasket is arranged outside the oil nozzle between the limiting step and the right end surface of the oil taking seat.
[0010] A fixed wing is arranged outside the valve cover; a connector is arranged at the center of the right outer wall of the blocking cover; the fixed wing and the connector are connected by an anti-lost chain.
[0011] A connecting hole is provided on the right side of the fixed wing; an annular connecting groove is provided on the outer wall of the connecting head; an upper hook is provided on the upper end of the anti-lost chain, which passes through the connecting hole and is bent and closed; a lower hook is provided on the lower end of the anti-lost chain, which is bent and closed and stuck in the connecting groove.
[0012] The outer wall of the right end of the oil nozzle is in a regular hexagon.
[0013] The outer wall in the middle of the external joint is provided with a regular hexagonal disassembly and assembly portion.
[0014] The beneficial effects of the utility model are:
[0015] Compared with the prior art, the quick oil-taking transformer stop valve adopting the structure of the utility model can lead a small part of the transformer oil in the external joint into the oil nozzle by rotating the oil nozzle, and finally discharge it to the outside through the oil nozzle. This discharge method can control the oil output within a very small range, not only can it be judged whether the transformer oil flowing out is deteriorated, but also can avoid the transformer oil spraying by limiting the flow rate during discharge. When the oil needs to be discharged, a part of the transformer oil can be discharged to the outside through the oil nozzle first, so that the oil pressure in the oil channel of the transformer drops, and then the plug in the water outlet joint is screwed out. At this time, the transformer oil discharged from the water outlet joint does not have the pressure for spraying, thereby effectively avoiding the situation where the transformer oil is splashed onto the staff due to the high pressure, effectively eliminating safety hazards, and at the same time avoiding the situation where the transformer oil splashes to the outside and causes waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a stop valve for a quick oil extraction transformer of the utility model;
[0017] Figure 2 It is a partial cross-sectional view of the utility model of the stop valve for quick oil extraction transformer;
[0018] Figure 3 It is a cross-sectional view of a stop valve for a quick oil-taking transformer of the utility model. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:
[0020] See also Figures 1 to 3The utility model provides a quick-take oil-taking stop valve for transformers, comprising a valve body 1, a water inlet joint 2 arranged at the front side of the valve body 1, and a water outlet joint 3 arranged at the rear side of the valve body 1, a plug 4 is screwed in the water outlet joint 3, a water baffle 5 is arranged in the valve body 1, an opening and closing hole 6 is arranged in the center of the water baffle 5, the water inlet joint 2 is connected with the water outlet joint 3 through the opening and closing hole 6, a valve flap 7 for blocking and sealing the upper end opening of the opening and closing hole 6 is arranged in the valve body 1, a valve stem 8 is arranged in the center of the valve flap 7, a valve cover 9 matching therewith is arranged at the upper end of the valve body 1, the upper end of the valve stem 8 passes upward to the outside of the valve cover 9 and is provided with a hand wheel 10, the front end of the water inlet joint 2 is screwed with an external joint 11 matching therewith; an oil taking seat 12 is arranged on the right side wall of the front part of the external joint 11; the oil taking seat 12 An adjusting hole 13 is provided at the center of the right end face; an oil drain hole 14 communicating with the internal space of the external joint 11 is provided at the center of the bottom of the adjusting hole 13; an internal thread 15 is provided on the inner wall of the adjusting hole 13; an oil nozzle 16 threadedly connected to the internal thread 15 is provided in the adjusting hole 13; a sealing head 17 is provided at the center of the left end face of the oil nozzle 16, and the left end face of the sealing head 17 shields and seals the right end opening of the oil drain hole 14; an oil gap 18 is provided between the outer wall of the sealing head 17 and the inner wall of the adjusting hole 13; an oil inlet hole 19 communicating with the internal space of the oil nozzle 16 is provided on one side of the outer wall of the sealing head 17; a plugging cover 20 matching with it is threadedly connected to the outside of the oil taking seat 12; the right end of the oil nozzle 16 passes to the right to the outside of the adjusting hole 13 and passes into the plugging cover 20.
[0021] A sealing ring 21 is provided between the outer edge of the left end surface of the sealing head 17 and the adjusting hole 13 , and the sealing ring 21 encloses the right end opening of the oil drain hole 14 ; the sealing ring 21 is made of rubber.
[0022] The right end of the oil nozzle 16 is provided with an annular limiting portion 23 ; a movable spacing 24 is defined between the left side wall of the limiting portion 23 and the right end surface of the oil extraction seat 12 .
[0023] The outer wall of the sealing head 17 is provided with a guide cone surface 25 which is wider on the left and narrower on the right. The outer end opening of the oil inlet hole 19 is located on the right end of the guide cone surface 25 .
[0024] An annular limiting step 26 is provided on the inner wall of the left portion of the blocking cover 20 ; an annular gasket 27 is provided outside the oil nozzle 16 between the limiting step 26 and the right end surface of the oil extraction seat 12 .
[0025] The valve cover 9 is provided with a fixed wing 28 ; a connector 29 is provided at the center of the right outer wall of the plug cover 20 ; the fixed wing 28 and the connector 29 are connected by an anti-lost chain 30 .
[0026] A connecting hole 31 is provided on the right side of the fixed wing 28; an annular connecting groove 32 is provided on the outer wall of the connecting head 29; an upper hook 33 is provided on the upper end of the anti-lost chain 30, the upper hook 33 passes through the connecting hole 31 and is bent closed; a lower hook 34 is provided on the lower end of the anti-lost chain 30, the lower hook 34 is bent closed and stuck in the connecting groove 32.
[0027] The outer wall of the right end of the oil nozzle 16 is in a regular hexagonal shape.
[0028] The outer wall of the middle portion of the external joint 11 is provided with a regular hexagonal disassembly portion 35 .
[0029] The method of using the utility model is as follows:
[0030] Both ends of the external joint 11 can be used for connection. When the left end of the external joint 11 is screwed into the water inlet joint 2, the right end of the external joint 11 can be screwed into the oil channel port of the transformer to play a connecting role. The transformer oil can enter the water inlet joint 2 through the external joint 11. When the upper end opening of the opening and closing hole 6 is shielded and sealed by the valve disc 7, the water inlet joint 2 and the external joint 11 will eventually be filled with transformer oil.
[0031] When it is necessary to detect whether the transformer oil has deteriorated, the plugging cover 20 can be unscrewed from the oil extraction seat 12. As the plugging cover 20 is removed, the right end port of the oil nozzle 16 is exposed to the outside. At this time, the oil nozzle 16 can be rotated by rotating the right end of the oil nozzle 16 to make the oil nozzle 16 move to the right along the trajectory of the internal thread 15. When the outer wall of the right end of the oil nozzle 16 is a regular hexagon, it is convenient to rotate the right end of the oil nozzle 16 with a wrench. As the oil nozzle 16 moves to the right, the sealing head 17 moves to the right synchronously. The sealing head 17 no longer covers and seals the right end opening of the oil drain hole 14. The transformer oil in the external joint 11 will enter the bottom of the adjusting hole 13 through the oil drain hole 14, and then enter the oil passing gap 18 between the outer wall of the sealing head 17 and the inner wall of the adjusting hole 13, and then enter the internal space of the oil nozzle 16 through the oil inlet hole 19, and finally flow out from the right end port of the oil nozzle 16 to the outside, so that the staff can detect whether the transformer oil in the transformer has deteriorated.
[0032] In summary, the utility model can lead a small part of the transformer oil in the external joint 11 into the oil nozzle 16 by rotating the oil nozzle 16, and finally discharge it to the outside through the oil nozzle 16. This discharge method can control the oil output within a very small range, not only can it be judged whether the transformer oil flowing out is deteriorated, but also can avoid the transformer oil spraying by limiting the flow rate during discharge. When the oil needs to be discharged, a part of the transformer oil can be discharged to the outside through the oil nozzle 16 first, so that the oil pressure in the oil channel of the transformer drops, and then the plug 4 in the water outlet joint 3 is screwed out. At this time, the transformer oil discharged from the water outlet joint 3 does not have the pressure for spraying, thereby effectively avoiding the situation where the transformer oil is splashed onto the staff due to the high pressure, effectively eliminating safety hazards, and at the same time avoiding the situation where the transformer oil splashes to the outside and causes waste.
[0033] When it is necessary to drain the oil through the water outlet joint 3, the plug 4 can be first unscrewed from the left end port of the water outlet joint 3, and then the valve stem 8 can be rotated by the handwheel 10. At this time, the valve stem 8 moves up along the thread on the inner wall of the valve cover 9, thereby realizing the upward movement of the valve flap 7. When the valve flap 7 moves up, the valve flap 7 no longer covers and seals the upper end opening of the opening and closing hole 6, and the water inlet joint 2 can be connected with the water outlet joint 3 through the opening and closing hole 6. Finally, the transformer oil will enter the water outlet joint 3 through the opening and closing hole 6 and be discharged from the water outlet joint 3 to achieve the oil drainage effect. At the same time, the corresponding oil drainage pipeline can be screwed on the left end of the water outlet joint 3, so that the transformer oil can be discharged accurately to the actually required position. At the same time, the plug 4 can play a dustproof effect to prevent external dust or debris from entering the water outlet joint 3 and affecting the cleanliness of the transformer oil.
[0034] A sealing ring 21 is provided between the outer edge of the left end face of the sealing head 17 and the adjusting hole. The sealing ring 21 encloses the right end opening of the oil drain hole 14. The sealing ring 21 is made of rubber. The existence of the sealing ring 21 can effectively increase the sealing between the left end face of the sealing head 17 and the bottom of the adjusting hole 13 to avoid oil leakage. The plugging cover 20 is equivalent to a insurance. Even if oil leakage occurs, the plugging cover 20 can retain the transformer oil inside itself.
[0035] An annular limiting portion 23 is provided at the right end of the oil nozzle 16, and a moving distance 24 is provided between the left side wall of the limiting portion 23 and the right end surface of the oil extraction seat 12. The existence of the moving distance 24 can effectively limit the leftward movement of the limiting portion 23, thereby avoiding excessive compression of the sealing ring 21 when the sealing head 17 moves to the left, resulting in elastic failure of the sealing ring 21.
[0036] The outer wall of the sealing head 17 is provided with a guide cone 25 which is wider on the left and narrower on the right. The outer end opening of the oil inlet hole 19 is located on the right end of the guide cone 25. The existence of the guide cone 25 can quickly guide the transformer oil into the oil inlet hole 19 after the transformer oil enters the oil gap 18.
[0037] An annular limiting step 26 is provided on the inner wall of the left part of the plugging cover 20, and a set of annular gaskets 27 outside the oil nozzle 16 is provided between the limiting step 26 and the right end surface of the oil collection seat 12. The presence of the annular gasket 27 can not only prevent wear, but also further ensure the sealing between the limiting step 26 and the right end surface of the oil collection seat 12. At the same time, the plugging cover 20 can play a dust-proof effect, prevent external dust from entering the oil nozzle 16, and ensure the cleanliness of the transformer oil.
[0038] A fixed wing 28 is provided outside the valve cover 9, and a connector 29 is provided at the center of the outer wall on the right side of the plugging cover 20. The fixed wing 28 and the connector 29 are connected by an anti-lost chain 30. When the stop valve is used on a transformer, it is generally at a high place. Therefore, if the staff unscrews the plugging cover, it is very easy to fall, which is not conducive to the later installation of the plugging cover 20. The anti-lost chain 30 can be suspended in the air after the plugging cover 20 is unscrewed from the oil extraction seat 12 to avoid loss.
[0039] A connecting hole 31 is provided on the right side of the fixed wing 28, and an annular connecting groove 32 is provided on the outer wall of the connecting head 29. An upper hook 33 is provided on the upper end of the anti-lost chain 30, and the upper hook 33 passes through the connecting hole 31 and is bent and closed. A lower hook 34 is provided on the lower end of the anti-lost chain 30, and the lower hook 34 is bent and closed and stuck in the connecting groove 32. This fixing method facilitates the disassembly and assembly of the anti-lost chain 30, and is also conducive to the replacement of the anti-lost chain 30.
[0040] A regular hexagonal disassembly portion 35 is provided on the outer wall of the middle part of the external joint 11, so that a wrench can be clamped on the disassembly portion 35, and then the external joint 11 can be easily rotated by the wrench, which is conducive to the disassembly and assembly of the external joint 11.
Claims
1. A stop valve for a quick-access oil-taking transformer, comprising a valve body, a water inlet joint arranged on the front side of the valve body, and a water outlet joint arranged on the rear side of the valve body, a plug being screwed in the water outlet joint, a water baffle being arranged in the valve body, an opening and closing hole being arranged in the center of the water baffle, the water inlet joint being connected with the water outlet joint through the opening and closing hole, a valve disc being arranged in the valve body for blocking and sealing the upper end opening of the opening and closing hole, a valve stem being arranged in the center of the valve disc, a valve cover matching the upper end port of the valve body being arranged, the upper end of the valve stem passing upward to the outside of the valve cover and being arranged with a hand wheel, characterized in that: An external joint matching with the water inlet joint is threadedly connected at the front end thereof; an oil extraction seat is provided on the right side wall of the front part of the external joint; an adjusting hole is provided at the center of the right end face of the oil extraction seat; an oil drain hole communicating with the internal space of the external joint is provided at the center of the bottom of the adjusting hole; an internal thread is provided on the inner wall of the adjusting hole; an oil nozzle threadedly connected with the internal thread is provided in the adjusting hole; a sealing head is provided at the center of the left end face of the oil nozzle, and the left end face of the sealing head shields and seals the right end opening of the oil drain hole; an oil gap is provided between the outer wall of the sealing head and the inner wall of the adjusting hole; an oil inlet communicating with the internal space of the oil nozzle is provided on one side of the outer wall of the sealing head; a plugging cover matching with the oil extraction seat is threadedly connected to the outside of the oil extraction seat; the right end of the oil nozzle passes to the right to the outside of the adjusting hole and passes into the plugging cover.
2. The quick-access oil-discharging transformer stop valve according to claim 1 is characterized in that: A sealing ring is arranged between the outer edge of the left end surface of the sealing head and the adjusting hole, and the sealing ring encloses the right end opening of the oil drain hole; the sealing ring is made of rubber.
3. The quick-access oil-discharging transformer stop valve according to claim 2 is characterized in that: The right end of the oil nozzle is provided with an annular limiting portion; a moving distance is provided between the left side wall of the limiting portion and the right end surface of the oil extraction seat.
4. The quick-access oil-taking transformer stop valve according to claim 1 is characterized in that: The outer wall of the sealing head is provided with a guide cone surface which is wider on the left and narrower on the right, and the outer end opening of the oil inlet hole is located on the right end of the guide cone surface.
5. The quick-access oil-discharging transformer stop valve according to claim 1 is characterized in that: An annular limiting step is arranged on the inner wall of the left part of the blocking cover; and an annular gasket is arranged outside the oil nozzle between the limiting step and the right end surface of the oil taking seat.
6. The quick-discharge oil-taking transformer stop valve according to claim 1 is characterized in that: A fixed wing is arranged outside the valve cover; a connector is arranged at the center of the right outer wall of the blocking cover; the fixed wing and the connector are connected by an anti-lost chain.
7. The quick-access oil-discharging transformer stop valve according to claim 6 is characterized in that: A connecting hole is provided on the right side of the fixed wing; an annular connecting groove is provided on the outer wall of the connecting head; an upper hook is provided on the upper end of the anti-lost chain, which passes through the connecting hole and is bent and closed; a lower hook is provided on the lower end of the anti-lost chain, which is bent and closed and stuck in the connecting groove.
8. The quick-discharge oil-taking transformer stop valve according to claim 1 is characterized in that: The outer wall of the right end of the oil nozzle is in a regular hexagon.
9. The quick-access oil-discharging transformer stop valve according to claim 1, characterized in that: The outer wall in the middle of the external joint is provided with a regular hexagonal disassembly and assembly portion.