External explosion-proof device of transformer riser
By using an external explosion-proof device for the transformer riser, and utilizing an anti-arch membrane sliding ring and a pressure-reducing chamber assembly, a dual explosion-proof effect for the transformer riser is achieved. This solves the problems of complex installation and high cost of existing devices, reduces the risk of deflagration, and saves replacement costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU ZHIRUN ELECTRIC CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-26
AI Technical Summary
The existing explosion-proof devices for transformer risers have problems such as complicated installation and replacement of the anti-arch membrane, high cost, and poor explosion-proof effect.
An external explosion-proof device for the transformer riser is adopted, including components such as an exhaust port, an anti-arching diaphragm sliding ring, a compression spring, a connecting ring, and a decompression chamber. Gas pushes the anti-arching diaphragm sliding ring to compress the spring. When it ruptures, an alarm is triggered and the gas enters the decompression chamber, achieving dual protection and preventing the oil-gas mixture from contacting the air.
It achieves dual explosion-proof effect, reduces the risk of oil-gas mixture coming into contact with air, lowers the risk of deflagration, and has a simple structure that facilitates the replacement of the anti-arching diaphragm, saving enterprise costs.
Smart Images
Figure CN224417591U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of explosion-proof safety protection technology for oil-immersed transformers, specifically an external explosion-proof device for a transformer riser base. Background Technology
[0002] Internal faults that may occur during transformer operation can lead to increased transformer oil temperature and oil vapor expansion, which in turn can cause the transformer tank or riser to explode, resulting in serious equipment damage and environmental pollution, and even endangering human life.
[0003] For example, application CN213781801U discloses a special explosion-proof pressure relief device for transformer bushing risers, including a transformer bushing riser body, a control valve, a pressure relief device, and a pressure reducing chamber. The transformer bushing riser is provided with a pressure relief port. The front end of the control valve is fixedly connected to the pressure relief port, the rear end of the control valve is fixedly connected to the front end of the pressure relief device, the rear end of the pressure relief device is fixedly connected to the front end of the pressure reducing chamber, and an oil drain pipe is fixedly connected to the rear end of the pressure reducing chamber. The pressure relief device includes a diaphragm holder and an anti-arched diaphragm. The anti-arched diaphragm is a three-layer composite diaphragm, which, from the pressure side to the pressure relief side, sequentially includes a metal diaphragm, a sealing diaphragm, and a burst diaphragm. The anti-arched diaphragm is clamped and fixed by the diaphragm holder. The device is equipped with a pressure sensing and alarm device. When the pressure is too high and causes the anti-arched diaphragm to rupture, the series circuit and connecting bridge will be disconnected, and the external sensing device will detect the diaphragm status and issue an alarm signal.
[0004] However, the anti-arching membrane in this application uses a thin wire with an insulated outer layer to pass through the membrane rupture membrane to sense the membrane's state. This process is cumbersome, has high manufacturing costs, and the installation and replacement of the anti-arching membrane are troublesome and complicated, resulting in poor explosion-proof performance. Utility Model Content
[0005] The purpose of this application is to provide an external explosion-proof device for a transformer riser to solve the problems mentioned above.
[0006] The technical solution adopted in this application is as follows: An external explosion-proof device for a transformer riser base includes a transformer riser base as the main body of the equipment. An exhaust port is fixedly connected to the side of the transformer riser base. A sliding groove is provided on the right side of the exhaust port. A pressure sensor for the riser base pressure relief is fixedly connected to the bottom inner side of the sliding groove. An anti-arching diaphragm sliding ring is slidably connected to the inner side of the anti-arching diaphragm sliding ring. An anti-arching diaphragm is fixedly connected to the inner side of the anti-arching diaphragm sliding ring. A compression spring is fixedly connected to the right side of the compression spring. A fixing groove is fixedly connected to the right side of the compression spring. A connecting ring is slidably connected to the outer side of the exhaust port. A sealing ring is fixedly connected to the right side of the connecting ring. An air inlet pipe is slidably connected to the inner side of the sealing ring. A connecting ring limiting block is fixedly connected to the left side of the air inlet pipe. A fixing groove is provided in front of the connecting ring limiting block.
[0007] By adopting the above technical solution, during the operation of the equipment, when an electric arc occurs inside the transformer riser, generating gas and causing an increase in internal pressure, the gas will push the anti-arching diaphragm from the exhaust port. The anti-arching diaphragm will cause the sliding ring of the anti-arching diaphragm to compress the compression spring and move closer to the fixed groove. When the compression spring reaches its limit, it stops, and at this time, the anti-arching diaphragm has force to slide in the groove. When the pressure continues to rise and reaches the limit of the anti-arching diaphragm, the anti-arching diaphragm will rupture. At the moment of rupture, the sliding ring of the anti-arching diaphragm will move to the left under the action of the compression spring. At this time, without the restraint of the anti-arching diaphragm, the left side of the sliding ring of the anti-arching diaphragm will press against the pressure relief sensor of the riser. At this time, the alarm indicator light will light up orange, activating the warning and alerting personnel to stay away. Gas enters the pressure relief chamber through the intake pipe, reducing the pressure inside the transformer riser and preventing the oil-gas mixture from directly contacting the air and the external environment, thus reducing environmental pollution and the risk of deflagration. As the pressure inside the pressure relief chamber continues to rise, the gas pressure pushes the piston upward, compressing the telescopic spring, which in turn pushes the spring retaining ring to press against the pressure relief chamber pressure sensor. At this point, the alarm indicator turns red. After the gas is exhausted, the piston will return to its original position under the action of the telescopic spring, maintaining internal airtightness. Through the cooperation of the entire device, direct contact between the oil-gas mixture and the air can be prevented, reducing the risk of deflagration and achieving dual protection, thus improving the explosion-proof effect. Furthermore, the device uses a threaded connection between the inner side of the connecting ring and the outer side of the exhaust port, facilitating the replacement of the anti-arching diaphragm and saving enterprise costs.
[0008] In a preferred embodiment, a sliding groove is slidably connected to the left outer edge of the anti-arching film.
[0009] By adopting the above technical solution, the anti-arching diaphragm sliding ring can be resisted, preventing accidental triggering of the pressure sensor for the lifting seat pressure relief.
[0010] In a preferred embodiment, a decompression chamber is fixedly connected to the right side of the air intake pipe.
[0011] By adopting the above technical solutions, the direct contact between the oil and gas mixture and the air and external environment is avoided, thus reducing environmental pollution and the risk of deflagration.
[0012] In a preferred embodiment, a pressure relief valve housing is fixedly connected to the upper part of the decompression chamber, a piston is slidably connected inside the pressure relief valve housing, a push rod is fixedly connected to the upper part of the piston, a fixed seat is slidably connected to the upper outer side of the push rod, a telescopic spring is slidably connected to the outer side of the push rod, a spring retaining ring is fixedly connected to the upper part of the telescopic spring, a decompression chamber pressure relief sensor is fixedly connected to the upper part of the spring retaining ring, and a fixed seat is fixedly connected to the upper part of the decompression chamber pressure relief sensor.
[0013] By adopting the above technical solutions, the internal pressure of the decompression chamber is reduced, the risk of deflagration is reduced, dual protection is achieved, and the explosion-proof effect is improved.
[0014] In a preferred embodiment, an alarm indicator light is fixedly connected to the top of the decompression chamber.
[0015] By adopting the above technical solutions, early warning can be achieved, reducing personal injury.
[0016] In a preferred embodiment, a sealing groove is provided on the back side of the connecting ring limiting block, a sealing rubber ring is fixedly connected to the bottom inner side of the sealing groove, and a sealing ring is slidably connected above the sealing rubber ring.
[0017] By adopting the above technical solution, the connection between the connecting ring and the connecting ring limiting block is made tighter, maintaining internal airtightness and reducing the leakage of oil and gas mixtures, thus preventing environmental pollution.
[0018] In a preferred embodiment, the inner and outer sides of the anti-arching film sliding ring are slidably connected by a fixing groove and a sliding groove.
[0019] By adopting the above technical solution, the anti-arching membrane sliding ring can trigger the pressure sensor of the lifting seat to provide early warning in the event of the anti-arching membrane breaking.
[0020] In a preferred embodiment, a fixing ring is fixedly connected to the outer side of the exhaust port, and a connecting ring is slidably connected to the right side of the fixing ring.
[0021] By adopting the above technical solution, the connecting ring can be held in place, maintaining a tight connection.
[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:
[0023] In this application, during the operation of the equipment, when an electric arc occurs inside the transformer riser, generating gas and causing an increase in internal pressure, the gas pushes the anti-arching diaphragm from the exhaust port. The anti-arching diaphragm causes its sliding ring to compress the compression spring, bringing it closer to the fixed groove. When the compression spring reaches its limit, it stops, and the anti-arching diaphragm slides forcefully into the groove. When the pressure continues to rise, reaching the limit of the anti-arching diaphragm, it ruptures. At the moment of rupture, the sliding ring of the anti-arching diaphragm moves to the left under the action of the compression spring. Now free from the restraint of the anti-arching diaphragm, the left side of the sliding ring presses against the pressure relief sensor of the riser. At this time, the alarm indicator light illuminates orange, activating the warning and alerting personnel to stay away from the gas. By introducing air into the decompression chamber through the intake pipe, the pressure inside the transformer riser can be reduced, preventing the oil-gas mixture from directly contacting the air and the external environment, thus reducing environmental pollution and the risk of deflagration. As the pressure inside the decompression chamber continues to rise, the air pressure will push the piston upward, compressing the telescopic spring, which in turn pushes the spring retaining ring upward to squeeze the decompression chamber pressure sensor. At this time, the alarm indicator light turns red. After the gas is exhausted, the piston will return to its original position under the action of the telescopic spring, maintaining internal airtightness. This integrated device can prevent the oil-gas mixture from directly contacting the air, reducing the risk of deflagration and achieving dual protection, improving the explosion-proof effect. Furthermore, the device is connected by threads on the inner side of the connecting ring and the outer side of the exhaust port, making it easy to replace the anti-arching diaphragm and saving enterprise costs. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the device in this application;
[0025] Figure 2 This is a schematic diagram of the internal structure of the connecting ring device in this application;
[0026] Figure 3 This is a schematic diagram of the connection structure of the exhaust port device in this application;
[0027] Figure 4 This is a schematic diagram of the anti-arching thin film sliding ring device in this application;
[0028] Figure 5 This is a schematic diagram of the decompression chamber structure in this application;
[0029] Figure 6 This is a schematic diagram of the internal structure of the pressure relief valve device in this application;
[0030] Figure 7 This is a schematic diagram of the connection structure of the air intake pipe device in this application.
[0031] The markings in the diagram are: 1. Transformer riser; 2. Exhaust port; 3. Fixing ring; 4. Sliding groove; 5. Riser pressure sensor; 6. Connecting ring; 7. Sealing ring; 8. Anti-arching diaphragm sliding ring; 9. Anti-arching diaphragm; 10. Compression spring; 11. Connecting ring limit block; 12. Fixing groove; 13. Air inlet pipe; 14. Pressure relief chamber; 15. Alarm indicator light; 16. Pressure relief valve housing; 17. Fixing seat; 18. Piston; 19. Push rod; 20. Telescopic spring; 21. Spring fixing ring; 22. Pressure relief chamber pressure sensor; 23. Sealing groove; 24. Sealing rubber ring. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example
[0033] Reference Figure 1-6 An external explosion-proof device for a transformer riser includes a transformer riser 1 as the main body of the device. An exhaust port 2 is fixedly connected to the side of the transformer riser 1. A sliding groove 4 is formed on the right side of the exhaust port 2. A pressure relief sensor 5 is fixedly connected to the bottom inner side of the sliding groove 4. A reverse arching diaphragm sliding ring 8 is slidably connected to the inner side of the sliding groove 4. A reverse arching diaphragm 9 is fixedly connected to the inner side of the reverse arching diaphragm sliding ring 8. A compression spring 10 is fixedly connected to the right side of the reverse arching diaphragm sliding ring 8. A fixing groove 12 is fixedly connected to the right side of the compression spring 10. A connecting ring 6 is slidably connected to the outer side of the exhaust port 2. A sealing ring 7 is fixedly connected to the right side of the connecting ring 6. An air inlet pipe 13 is slidably connected to the inner side of the sealing ring 7. A connecting ring limiting block 11 is fixedly connected to the left side of the air inlet pipe 13. A fixing groove 12 is formed in front of the connecting ring limiting block 11. This device provides double protection, improves the explosion-proof effect, and saves enterprise costs.
[0034] Reference Figure 1-4 During the operation of the equipment, when an electric arc occurs inside the transformer riser 1, generating gas and causing an increase in internal pressure, the gas will push the anti-arching diaphragm 9 from the exhaust port 2. The anti-arching diaphragm 9 will cause the anti-arching diaphragm sliding ring 8 to compress the compression spring 10 and move it closer to the fixed groove 12. When the compression spring 10 is compressed to its limit, it stops. At this time, the anti-arching diaphragm 9 will forcefully slide into the groove 4.
[0035] Reference Figure 1-4When the pressure continues to rise and reaches the limit of the anti-arching diaphragm 9, the anti-arching diaphragm 9 will rupture. At the moment of rupture, the anti-arching diaphragm sliding ring 8 will move to the left under the action of the compression spring 10. At this time, without the restraint of the anti-arching diaphragm 9, the left side of the anti-arching diaphragm sliding ring 8 will press against the pressure sensor 5 of the lifting seat.
[0036] Reference Figure 1-4 At this time, the alarm indicator light 15 illuminates orange, activating the warning system and alerting personnel to stay away. Gas entering the pressure relief chamber 14 through the intake pipe 13 reduces the pressure inside the transformer riser 1, preventing the oil-gas mixture from directly contacting the air and external environment, thus reducing environmental pollution and the risk of deflagration.
[0037] Reference Figure 1-6 When the internal pressure of the decompression chamber 14 continues to rise, the air pressure will push the piston 18 upward, compress the telescopic spring 20, and push the spring retaining ring 21 upward to squeeze the decompression chamber pressure sensor 22. At this time, the alarm indicator light 15 turns red. After the gas is exhausted, the piston 18 will return to its original position under the action of the telescopic spring 20, maintaining the internal airtightness. The overall device can prevent the oil-gas mixture from directly contacting the air, reducing the risk of deflagration and achieving dual protection, improving the explosion-proof effect. In addition, the device is connected by threads on the inner side of the connecting ring 6 and the outer side of the exhaust port 2, which facilitates the replacement of the anti-arching diaphragm 9 and saves enterprise costs.
[0038] Reference Figure 1-3 A sliding groove 4 is slidably connected to the left outer edge of the anti-arched diaphragm 9. This groove can hold the anti-arched diaphragm sliding ring 8 in place, preventing accidental triggering of the pressure sensor 5 on the riser seat.
[0039] Reference Figure 1-4 A decompression chamber 14 is fixedly connected to the right side of the intake pipe 13. This prevents the oil-gas mixture from directly contacting the air and the external environment, thus reducing environmental pollution and the risk of deflagration.
[0040] Reference Figure 1-6 A pressure relief valve housing 16 is fixedly connected to the upper part of the decompression chamber 14. A piston 18 is slidably connected inside the pressure relief valve housing 16. A push rod 19 is fixedly connected above the piston 18. A fixed seat 17 is slidably connected to the outer side of the push rod 19. A telescopic spring 20 is slidably connected to the outer side of the push rod 19. A spring retaining ring 21 is fixedly connected above the telescopic spring 20. A decompression chamber pressure sensor 22 is fixedly connected above the spring retaining ring 21. A fixed seat 17 is fixedly connected above the decompression chamber pressure sensor 22. This reduces the internal pressure of the decompression chamber 14, reduces the risk of deflagration, achieves dual protection, and improves the explosion-proof effect.
[0041] Reference Figure 1-5 An alarm indicator light 15 is fixedly connected to the top of the decompression chamber 14. This provides early warning and reduces the risk of injury to personnel.
[0042] Reference Figure 1-7 A sealing groove 23 is provided on the back side of the connecting ring limiting block 11. A sealing rubber ring 24 is fixedly connected to the bottom inner side of the sealing groove 23, and a sealing ring 7 is slidably connected above the sealing rubber ring 24. This makes the connection between the connecting ring 6 and the connecting ring limiting block 11 tighter, maintains internal airtightness, reduces leakage of oil and gas mixtures, and minimizes environmental pollution.
[0043] Reference Figure 1-5 The inner and outer sides of the anti-arching diaphragm sliding ring 8 are slidably connected by a fixed groove 12 and a sliding groove 4. This allows the anti-arching diaphragm sliding ring 8 to trigger the pressure sensor 5 of the lifting seat in the event of breakage of the anti-arching diaphragm 9, thus providing an early warning.
[0044] Reference Figure 1-3 A fixing ring 3 is fixedly connected to the outer side of the exhaust port 2, and a connecting ring 6 is slidably connected to the right side of the fixing ring 3. The connecting ring 6 can be held in place to maintain a tight connection.
[0045] The implementation principle of an embodiment of an external explosion-proof device for a transformer riser in this application is as follows:
[0046] During operation, when an electric arc occurs inside the transformer riser 1, generating gas and causing an increase in internal pressure, the gas pushes the anti-arching diaphragm 9 from the exhaust port 2. The anti-arching diaphragm 9 then causes the anti-arching diaphragm sliding ring 8 to compress the compression spring 10, bringing it closer to the fixed groove 12. When the compression spring 10 reaches its limit, it stops. At this point, the anti-arching diaphragm 9 slides forcefully into the groove 4. As the pressure continues to rise, reaching the limit of the anti-arching diaphragm 9, it ruptures. At the moment of rupture, the anti-arching diaphragm sliding ring 8 moves to the left under the action of the compression spring 10. Without the restraint of the anti-arching diaphragm 9, the left side of the sliding ring 8 presses against the riser pressure relief sensor 5. At this time, the alarm indicator 15 illuminates orange, activating the warning and alerting personnel to stay away. Gas then passes through the inlet... The air pipe 13 enters the decompression chamber 14 to reduce the pressure inside the transformer riser 1, preventing the oil-gas mixture from directly contacting the air and the external environment, thus reducing environmental pollution and the risk of deflagration. When the pressure inside the decompression chamber 14 continues to rise, the air pressure will push the piston 18 upward, compressing the telescopic spring 20, which will push the spring retaining ring 21 upward to squeeze the decompression chamber pressure sensor 22. At this time, the alarm indicator 15 turns red. After the gas is exhausted, the piston 18 will return to its original position under the action of the telescopic spring 20, maintaining the internal airtightness. The entire device can prevent the oil-gas mixture from directly contacting the air, reducing the risk of deflagration, achieving dual protection, and improving the explosion-proof effect. In addition, the device is connected by threads on the inner side of the connecting ring 6 and the outer side of the exhaust port 2, which facilitates the replacement of the anti-arching diaphragm 9 and saves enterprise costs.
[0047] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. An external explosion-proof device for a transformer riser base, comprising the main body of the equipment, the transformer riser base (1), characterized in that: The transformer riser (1) is fixedly connected to the side of an exhaust port (2). A sliding groove (4) is provided on the right side of the exhaust port (2). A riser pressure sensor (5) is fixedly connected to the bottom of the inner side of the sliding groove (4). An anti-arching diaphragm sliding ring (8) is slidably connected to the inner side of the sliding groove (4). An anti-arching diaphragm (9) is fixedly connected to the inner side of the anti-arching diaphragm sliding ring (8). A compression spring (10) is fixedly connected to the right side of the anti-arching diaphragm sliding ring (8). A fixing groove (12) is fixedly connected to the right side of the compression spring (10). A connecting ring (6) is slidably connected to the outer side of the exhaust port (2). A sealing ring (7) is fixedly connected to the right side of the connecting ring (6). An air inlet pipe (13) is slidably connected to the inner side of the sealing ring (7). A connecting ring limiting block (11) is fixedly connected to the left side of the air inlet pipe (13). A fixing groove (12) is provided in front of the connecting ring limiting block (11).
2. The external explosion-proof device for a transformer riser as described in claim 1, characterized in that: The left outer edge of the anti-arch film (9) is slidably connected with a sliding groove (4).
3. The external explosion-proof device for a transformer riser as described in claim 1, characterized in that: A decompression chamber (14) is fixedly connected to the right side of the air intake pipe (13).
4. The external explosion-proof device for a transformer riser as described in claim 3, characterized in that: A pressure relief valve housing (16) is fixedly connected above the decompression chamber (14). A piston (18) is slidably connected inside the pressure relief valve housing (16). A push rod (19) is fixedly connected above the piston (18). A fixed seat (17) is slidably connected to the outer side of the push rod (19). A telescopic spring (20) is slidably connected to the outer side of the push rod (19). A spring retaining ring (21) is fixedly connected above the telescopic spring (20). A decompression chamber pressure relief sensor (22) is fixedly connected above the spring retaining ring (21). A fixed seat (17) is fixedly connected above the decompression chamber pressure relief sensor (22).
5. The external explosion-proof device for a transformer riser as described in claim 3, characterized in that: An alarm indicator light (15) is fixedly connected to the top of the decompression chamber (14).
6. The external explosion-proof device for a transformer riser as described in claim 1, characterized in that: The back side of the connecting ring limiting block (11) is provided with a sealing groove (23), and a sealing rubber ring (24) is fixedly connected to the bottom of the inner side of the sealing groove (23). A sealing ring (7) is slidably connected above the sealing rubber ring (24).
7. The external explosion-proof device for a transformer riser as described in claim 1, characterized in that: The inner and outer sides of the anti-arch film sliding ring (8) are connected by a fixing groove (12) and a sliding groove (4).
8. The external explosion-proof device for a transformer riser as described in claim 1, characterized in that: A fixing ring (3) is fixedly connected to the outside of the exhaust port (2), and a connecting ring (6) is slidably connected to the right side of the fixing ring (3).