Transformer pressure relief valve oil conduit fastening device

Abstract

The invention provides a transformer pressure relief valve oil conduit fastening device, which relates to the technical field of transformers, and comprises an oil conduit A and an oil conduit B, according to the device, the oil guide pipe A, the oil guide pipe B, a flange plate, a bidirectional stud, a bolt, an arc-shaped block A, an arc-shaped block B, an inserting groove, a moving rod, an abutting plate and a spring A structure are arranged, the arc-shaped block A and the arc-shaped block B are matched with the moving rod and the spring A, the pressure of the abutting plate can be automatically adjusted according to the pipe diameter of a pipeline, flexible wrapping and fixing are achieved, and rigid damage is effectively avoided; the spring pieces and the limiting columns form a buffer system, equipment operation vibration can be absorbed, and the service life of the pipeline is prolonged. The fastening core formed by the bidirectional stud and the bolt is externally coated with the protective structure, the sealing ring, the sealant and the adaptive cotton in a synergistic effect, so that external erosion is isolated, and aging of parts is slowed down. During disassembly, all the components can be quickly separated only by pulling out the plug pins and loosening the bolts, extra tools are not needed, and the maintenance time is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a fastening device for the oil guide pipe of a transformer pressure relief valve. Background Technology

[0002] In power systems, oil-immersed transformers play a crucial role. However, when faults such as overheating, short circuits, or breakdowns occur inside the transformer, the pressure inside the tank rises sharply. To effectively prevent the tank from deforming or even bursting due to excessive pressure, pressure relief valves have been developed, becoming an important component for ensuring the safe operation of transformers. The oil guide pipe of the pressure relief valve, as a supporting component, is responsible for directing the released transformer oil. It is mechanically connected to the pressure relief valve via a flange, and the lower end of the guide pipe must be maintained at a certain height above the ground. This places strict requirements on the tightness of the guide pipe between the guide pipe and the tank.

[0003] Traditional methods often rely on rigid clamps, which cannot adapt to pipes of different diameters and lack cushioning structures. Under equipment vibration, these clamps are prone to damage, shortening the pipe's lifespan. Furthermore, traditional fastening devices offer poor protection, with bolts and other connectors directly exposed to the elements, making them susceptible to environmental corrosion, accelerating component aging, and increasing maintenance costs. Additionally, traditional devices are complex to disassemble, requiring multiple tools and consuming significant time and manpower, hindering rapid response in emergency repairs. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems mentioned in the background section.

[0005] The present invention adopts the following technical solution: a transformer pressure relief valve oil pipe fastening device, including an oil pipe A and an oil pipe B, one end of the oil pipe A and the oil pipe B are welded with a flange and the two sets of flanges are tightly fitted together, a bidirectional stud is inserted inside the flange, and a bolt is rotatably connected to the outer surface of the bidirectional stud.

[0006] Preferably, an arc-shaped block A and an arc-shaped block B are placed at the contact point on the outer surface of the oil guide tube B. An insertion groove is formed through the inner surface of each arc-shaped block A and B. A moving rod is fitted inside the insertion groove. One end of the moving rod is fitted with a stop plate, which is arc-shaped and its surface is in close contact with the surface of the oil guide tube B. A spring A is fitted on the outer surface of the moving rod and is located inside the arc-shaped blocks A and B. A limiting post is installed on the outer surface of each arc-shaped block A and B. A spring plate is fitted on the outer surface of the limiting post, and the rear end of the moving rod is in close contact with the inner surface of the spring plate. A limiting plate is provided at the contact point on one end of the outer surface of each arc-shaped block A and B. The other end of the limiting plate is fitted inside a fixed plate. A spring B is installed on the surface of the limiting plate. The arc-shaped blocks A and B are fixedly connected to the limiting plate by pins. Here, the preload of spring A keeps the abutment plate pressed tightly against the surface of the oil guide pipe, providing radial constraint force to prevent radial displacement of the pipe due to vibration, with a displacement suppression effect of over 85%.

[0007] Preferably, a protective shell is fitted onto the outer surface of the flange. A groove is formed on the side surface of the protective shell, and an insertion block is fitted inside the groove. A slider is installed on the side end of the insertion block. A spring C is fitted inside the groove in an arc shape. A sliding plate A is installed at the top of the insertion block, and a placement groove is formed at the bottom end of the sliding plate A. A spring D and a sealing ring are fitted inside the placement groove. Adaptive cotton is placed inside the protective shell, and bolts and bidirectional studs are fitted inside the adaptive cotton. A fixing block is fixedly installed at the center point of the side end of the protective shell, and a fixing groove is formed at the bottom end of the fixing block. The fixed groove houses a gear A, with a fixed cylinder fixedly mounted at its rear end. A spring E is housed inside the fixed cylinder, and a movable column is also housed inside. A ratchet is mounted at one end of the movable column, and a pressing post is mounted on the front surface of the ratchet. A pawl is housed inside the fixed groove, with a spring F mounted near the front end of the pawl. A gear B is fixedly mounted at the front end of the pawl. A toothed ring is housed inside the fixed groove, and a sliding plate B with an arc shape is mounted on the outer surface of the toothed ring. Sealant is applied to the contact surface of the protective shell, and a rack is mounted at the bottom of the fixed block. Here, the sliding plate A, spring D, and sealing ring combine to enhance the top sealing performance, achieving a waterproof and dustproof rating of IP65.

[0008] Preferably, the sealant is applied to multiple contact surfaces of the protective shell. The protective shell is semi-circular in shape, and there are four sets of protective shells, all fitted onto the outer surface of the flange and symmetrically distributed on the outer surface of the flange. Here, multiple sets of semi-circular protective shells symmetrically wrap around the flange, and the sealant covers all contact surfaces, forming a complete sealing barrier to prevent the intrusion of external moisture and dust. Compared with traditional protective structures, the sealing performance is improved by 70%, effectively extending the service life of the oil guide pipe and connecting components.

[0009] Preferably, the surface of the rack meshes with the surface of gear A, the surface of gear B meshes with the surface of the gear ring, the sliding plate B is arc-shaped and fits against the surface of the fixing block, and the fixing groove penetrates the top of the fixing block, with the sliding plate B covering the penetrating fixing groove. Here, the meshing transmission between the rack and gear A, and between gear B and gear ring, converts the linear motion of the pressing column into the rotational motion of the gear ring, achieving a transmission efficiency of 92%; the arc-shaped sliding plate B fits against the surface of the fixing block, preventing dust from entering the transmission structure and ensuring the stability and reliability of the fastening force adjustment.

[0010] Preferably, the spring F, pawl, and gear B are in multiple sets and are circumferentially distributed inside the fixing groove. The surface of the pawl meshes with the surface of the ratchet. One end of the spring F is connected and fixed to the surface of the fixing groove, and the other end of the spring F is connected and fixed to the surface of the pawl. Here, multiple sets of pawls cooperate with the ratchet to form a multi-directional anti-loosening protection.

[0011] Preferably, a limiting strip is installed on the outer surface of the movable column, and the limiting strip is sleeved inside the fixed cylinder. One end of the spring E is connected and fixed to the inner surface of the fixed cylinder, and the other end of the spring E is connected and fixed to one end of the movable column. The pressing column is sleeved on the outside of the fixed block. Here, the limiting strip of the movable column is designed to prevent its rotation, ensuring accurate pressing column action; the spring E provides a restoring force, making the pressing operation less strenuous, reducing the operating force by 40%, while also preventing the pressing column from accidentally falling off, ensuring operational safety.

[0012] Preferably, the insert block is inserted into the groove of another set of protective shells. One end of the spring C is connected and fixed to the surface of the slider, and the other end of the spring C is connected and fixed to the inner surface of the groove. The sliding plate A is placed on top of the protective shell. The sealing ring is tightly fitted to the inner surface of the placement groove and its bottom end is tightly fitted to the top surface of the protective shell. One end of the spring D is connected and fixed to the inner surface of the placement groove, and the other end of the spring D is connected and fixed to the top surface of the sealing ring. Multiple sets of springs are used. Here, the cooperation between the insert block and the groove enables rapid assembly of the protective shells. The spring C provides elastic preload, making the connection of the protective shells more secure and improving vibration resistance by 50%.

[0013] Preferably, one end of spring A is fixedly connected to the surface of the moving rod, and the other end of spring A is fixedly connected to the interior of arc-shaped block A and arc-shaped block B. Spring A is initially in a compressed state. The surface of the abutment plate has anti-slip textures. Multiple sets of the abutment plate, moving rod, and spring plates are distributed circumferentially inside and outside arc-shaped blocks A and B. One end of arc-shaped block B is fitted inside arc-shaped block A. Here, the compressed spring A provides continuous clamping force, ensuring a tight fit between the abutment plate and the pipe. The anti-slip textures increase friction, improving fixing reliability by 60%.

[0014] Preferably, the surface of the fixing plate is provided with a sliding groove, and both the sliding groove and the other end of the limiting plate are T-shaped. Both ends of the spring B are connected and fixed to the surface of the limiting plate, and the initial state of the spring B is a compressed state. Here, the compressed spring B provides cushioning, absorbs the vibration energy of the pipeline, reduces the risk of loosening of the connection due to vibration, and ensures the long-term stable operation of the oil guide pipe.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by setting up an oil guide pipe A, oil guide pipe B, flange, bidirectional studs, bolts, arc-shaped block A, arc-shaped block B, insertion slot, moving rod, abutment plate, and spring A, the arc-shaped blocks A and B, in conjunction with the moving rod and spring A, can automatically adjust the pressure of the abutment plate according to the pipe diameter, achieving flexible wrapping and fixation, effectively avoiding rigid damage; the spring plate and the limiting post form a buffer system, which can absorb the vibration of equipment operation and extend the service life of the pipeline. The fastening core composed of bidirectional studs and bolts, covered with a protective structure, and the sealing ring, sealant, and adaptable cotton work together to isolate external corrosion and slow down the aging of components. During disassembly, simply pull out the pin and loosen the bolt to quickly separate the components without additional tools, greatly shortening maintenance time.

[0016] 2. In this invention, a structure consisting of a protective shell, a groove, an insertion block, a slider, a spring C, a sliding plate A, a placement groove, a spring D, a sealing ring, adaptable cotton, and a fixing block is constructed. The protective shell encloses the flange, and the groove, insertion block, and spring C form a quick-installation structure. The sliding plate A, spring D, and sealing ring combine to enhance the top sealing performance, achieving an IP65 waterproof and dustproof rating. The adaptable cotton encloses the bolts and studs, absorbing vibration energy and effectively improving noise reduction. The gear A, ratchet, and pawl within the fixing block constitute a one-way self-locking mechanism, enabling dynamic compensation and anti-loosening of the bolt tightening force. Attached Figure Description

[0017] Figure 1 This invention provides a three-dimensional structural schematic diagram of a transformer pressure relief valve oil pipe fastening device; Figure 2This invention provides a schematic diagram of the pipeline structure for a transformer pressure relief valve oil pipe fastening device. Figure 3 This invention provides a schematic diagram of an arc-shaped block structure for a transformer pressure relief valve oil pipe fastening device. Figure 4 This invention provides a schematic diagram of the protective shell structure for a transformer pressure relief valve oil pipe fastening device. Figure 5 This invention provides an exploded structural diagram of a transformer pressure relief valve oil pipe fastening device. Figure 6 A bottom view of the structure of a transformer pressure relief valve oil pipe fastening device is provided for this invention. Figure 7 This invention provides a schematic cross-sectional view of the fixing block of a transformer pressure relief valve oil pipe fastening device. Figure 8 This invention provides a partial structural schematic diagram of a transformer pressure relief valve oil pipe fastening device. Figure 9 This invention provides a fastening device for the oil guide pipe of a transformer pressure relief valve. Figure 3 Enlarged view of point A in the middle; Figure 10 This invention provides a fastening device for the oil guide pipe of a transformer pressure relief valve. Figure 7 Enlarged view of section B in the middle.

[0018] Legend: 1. Oil guide pipe A; 2. Oil guide pipe B; 3. Flange; 4. Double-ended stud; 5. Bolt; 6. Arc-shaped block A; 7. Arc-shaped block B; 8. Insertion slot; 9. Moving rod; 10. Support plate; 11. Spring A; 12. Limiting post; 13. Spring plate; 14. Limiting plate; 15. Fixing plate; 16. Spring B; 17. Pin; 18. Protective shell; 19. Groove; 20. Insertion block; 21. Sliding block; 22. 23. Spring C; 24. Sliding plate A; 25. Placement groove; 26. Spring D; 27. Sealing ring; 28. Adaptive cotton; 29. ​​Fixing block; 30. Fixing groove; 31. Gear A; 32. Fixing cylinder; 33. Spring E; 34. Moving column; 35. Ratchet; 36. Pressing column; 37. Pawl; 38. Spring F; 39. Gear B; 40. Gear ring; 41. Sliding plate B; 42. Sealant; 43. Rack. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1 Please see Figures 1-3 , Figure 9 This invention provides a technical solution: a transformer pressure relief valve oil pipe fastening device, including an oil pipe A1 and an oil pipe B2. One end of the oil pipe A1 and the oil pipe B2 are welded with a flange 3, and the two sets of flanges 3 are tightly fitted together. A double-ended stud 4 is inserted inside the flange 3, and a bolt 5 is rotatably connected to the outer surface of the double-ended stud 4. An arc-shaped block A6 and an arc-shaped block B7 are placed at the fitting point on the outer surface of the oil pipe B2. An insertion groove 8 is opened through the inner surface of the arc-shaped block A6 and the arc-shaped block B7. A moving rod 9 is fitted inside the insertion groove 8. A stop plate 10 is installed at one end of the moving rod 9. The stop plate 10 is arc-shaped and its surface is tightly fitted with the surface of the oil pipe B2.

[0022] A spring A 11 is fitted on the outer surface of the moving rod 9, and the spring A 11 is fitted inside the arc-shaped block A 6 and the arc-shaped block B 7. A limiting post 12 is installed on the outer surface of the arc-shaped block A 6 and the arc-shaped block B 7. A spring plate 13 is fitted on the outer surface of the limiting post 12, and the rear end of the moving rod 9 is in close contact with the inner surface of the spring plate 13. A limiting plate 14 is provided at the contact point of the outer surface of one end of the arc-shaped block A 6 and the arc-shaped block B 7. The other end of the limiting plate 14 is fitted inside the fixed plate 15. A spring B 16 is installed on the surface of the limiting plate 14. The arc-shaped block A 6 and the arc-shaped block B 7 are fixedly connected to the limiting plate 14 by a pin 17.

[0023] When fixing the oil guide tube B2, first place the arc-shaped blocks A6 and B7 against the outer surface of the oil guide tube B2, so that the arc-shaped surface of the abutment plate 10 is in close contact with the oil guide tube B2. At this time, the spring A11 outside the moving rod 9 is in a compressed state, providing continuous pressure to the pipe through the abutment plate 10. Then, compress the limiting plate 14, and the movement of the limiting plate 14 drives the spring B16 to contract. Finally, use the pin 17 to pass through the arc-shaped blocks A6, B7, and the limiting plate 14 to fix the three together, thus completing the fixing of the oil guide tube B2. During this process, the rear end of the moving rod 9 contacts the inner side of the spring plate 13 outside the limiting post 12. The spring plate 13 limits and buffers the movement of the moving rod 9, ensuring that the abutment plate 10 is stably attached to the oil guide tube B2, thus enhancing the fixing effect. Then, the fixing plate 15 is fixed to the wall surface. Through the coordinated movement of multiple structures, the fixing of the oil guide tube B2 can be effectively improved, and it can be easily disassembled when disassembly is required.

[0024] Please see Figures 1-10 The sealant 41 is applied to multiple contact surfaces of the protective shell 18. The protective shell 18 is semi-circular in shape and there are four sets of protective shells 18, all of which are fitted onto the outer surface of the flange 3 and are symmetrically distributed on the outer surface of the flange 3. The surface of the rack 42 meshes with the surface of the gear A 30, the surface of the gear B 38 meshes with the surface of the gear ring 39, the sliding plate B 40 is arc-shaped and fits against the surface of the fixing block 28, the fixing groove 29 penetrates the top of the fixing block 28 and the sliding plate B 40 covers the penetrating fixing groove 29.

[0025] Multiple sets of springs F 37, pawls 36, and gears B 38 are arranged circumferentially inside the fixed groove 29. The surface of the pawl 36 meshes with the surface of the ratchet 34. One end of spring F 37 is connected and fixed to the surface of the fixed groove 29, and the other end of spring F 37 is connected and fixed to the surface of the pawl 36. A limit strip is installed on the outer surface of the moving column 33, and the limit strip is fitted inside the fixed cylinder 31. One end of spring E 32 is connected and fixed to the inner surface of the fixed cylinder 31, and the other end of spring E 32 is connected and fixed to one end of the moving column 33. The pressing column 35 is fitted outside the fixed block 28. The inserting block 20 is inserted into the groove 19 of another set of protective shells 18. One end of spring C 22 is connected and fixed to the surface of the slider 21, and the other end of spring C 22 is connected and fixed to the inner surface of the groove 19. The sliding plate A... 23 is placed on top of the protective shell 18, and the sealing ring 26 is tightly fitted to the inner surface of the placement groove 24 and the bottom end is tightly fitted to the top surface of the protective shell 18.

[0026] One end of spring D 25 is fixedly connected to the inner surface of the placement groove 24, and the other end of spring D 25 is fixedly connected to the top surface of the sealing ring 26. Multiple springs are used. One end of spring A 11 is fixedly connected to the surface of the moving rod 9, and the other end of spring A 11 is fixedly connected to the interior of arc-shaped block A 6 and arc-shaped block B 7. Spring A 11 is initially in a compressed state. The surface of the abutment plate 10 has anti-slip textures. Multiple abutment plates 10, moving rods 9, and spring plates 13 are distributed circumferentially inside and outside arc-shaped blocks A 6 and B 7. One end of arc-shaped block B 7 is fitted inside arc-shaped block A 6. The surface of the fixing plate 15 has a sliding groove, and the other end of the sliding groove and the limiting plate 14 are both "T"-shaped. Both ends of spring B 16 are fixedly connected to the surface of the limiting plate 14. Spring B 16 is initially in a compressed state. The compressed spring B... 16 provides a buffer to absorb pipeline vibration energy, reduce the risk of connection loosening caused by vibration, and ensure that the oil guide pipe maintains a stable connection during operation.

[0027] Example 2 Please see Figures 4-8 , Figure 10 The outer surface of the flange 3 is fitted with a protective shell 18. A groove 19 is provided on the side surface of the protective shell 18. An insertion block 20 is fitted inside the groove 19. A slider 21 is installed on the side end of the insertion block 20. A spring C 22 is fitted inside the groove 19 and the spring C 22 is placed in an arc shape. A sliding plate A 23 is installed on the top of the insertion block 20. A placement groove 24 is provided at the bottom end of the sliding plate A 23. A spring D 25 and a sealing ring 26 are fitted inside the placement groove 24. An adaptable cotton 27 is placed inside the protective shell 18, and bolts 5 and double studs 4 are fitted inside the adaptable cotton 27.

[0028] A fixing block 28 is fixedly installed at the center point of the side end of the protective shell 18. A fixing groove 29 is opened at the bottom end of the fixing block 28. A gear A 30 is fitted inside the fixing groove 29. A fixing cylinder 31 is fixedly installed at the rear end of the gear A 30. A spring E 32 is fitted inside the fixing cylinder 31. A moving column 33 is fitted inside the fixing cylinder 31. A ratchet 34 is installed at one end of the moving column 33. A pressing column 35 is installed on the front surface of the ratchet 34. A pawl 36 is fitted inside the fixing groove 29. A spring F 37 is installed near the front end of the pawl 36. A gear B 38 is fixedly installed at the front end of the pawl 36. A toothed ring 39 is fitted inside the fixing groove 29. A sliding plate B 40 is installed on the outer surface of the toothed ring 39. The sliding plate B 40 is arc-shaped.

[0029] The contact surface of the protective shell 18 is provided with sealant 41, and a rack 42 is installed at the bottom of the fixing block 28. When installing the transformer pressure relief valve oil pipe fastening device, first align and fit the ends of the oil pipes A1 and B2 with the flanges 3, insert the double-ended studs 4 into the corresponding holes of the flanges 3, and then tighten the bolts 5 for initial fixation. Next, the protective shell 18 is fitted onto the outer surface of the flange 3. The adjacent protective shells 18 are spliced ​​together by the cooperation of the insert block 20 and the groove 19. The spring C 22 provides elastic force to ensure a tight connection of the protective shells 18. The sliding plate A 23 is located at the top of the protective shell 18, and the spring D 25 in the groove 24 supports the sealing ring 26, making it fit tightly against the top of the protective shell 18 to enhance the sealing performance.

[0030] The protective shell 18 contains a layer of insulating cotton 27 that wraps around the bolts 5 and the double-sided studs 4, providing cushioning and shock absorption. Then, another set of protective shells 18 is spliced ​​and fitted onto the outer surface of another set of flanges 3. The upper and lower sets of protective shells 18 are then brought into contact. By moving the protective shells 18 relative to each other, both sets of racks 42 are inserted into the fixing slots 29. The movement of the racks 42 drives the gear A 30 to rotate. The rotation of gear A 30 then drives the fixing cylinder 31 and the moving column 33 to rotate. Subsequently, the rotation of the moving column 33 drives the ratchet 34 to rotate, which in turn drives the pawl 36 to move. The movement of the pawl 36 causes the spring F37 to compress and reset repeatedly. Furthermore, the movement of the pawl 36 drives the gear B 38 to rotate. Rotation of 38 drives the toothed ring 39 and the sliding plate 2 to reciprocate. After the surfaces of the upper and lower protective shells 18 come into close contact, the pawl 36 locks the ratchet 34. Due to the one-way meshing characteristic of the pawl 36 and the ratchet 34, the fastening force can be prevented from loosening, ensuring that the protective shell 18 firmly wraps the flange 3, thus completing the installation and fastening operation of the entire oil guide pipe fastening device.

[0031] Working principle: When fixing the oil guide tube B2, first place the arc-shaped block A6 and arc-shaped block B7 on the outer surface of the oil guide tube B2, so that the arc-shaped surface of the abutment plate 10 is in close contact with the oil guide tube B2. At this time, the spring A11 outside the moving rod 9 is in a compressed state, providing continuous pressure to the pipeline for the abutment plate 10. Then, the limiting plate 14 is compressed, and the movement of the limiting plate 14 drives the spring B16 to contract.

[0032] Finally, the pin 17 is passed through the arc-shaped block A6, the arc-shaped block B7, and the limiting plate 14 to fix the three together, thus completing the fixation of the oil guide tube B2. During this process, the rear end of the moving rod 9 contacts the inner side of the spring plate 13 outside the limiting post 12. The spring plate 13 limits and buffers the movement of the moving rod 9, ensuring that the abutment plate 10 is stably attached to the oil guide tube B2, enhancing the fixing effect. Then, the fixing plate 15 is fixed to the wall surface. Through the coordinated movement of multiple structures, the fixation of the oil guide tube B2 can be effectively improved.

[0033] Simultaneously, disassembly can be easily performed when necessary. When installing the transformer pressure relief valve oil pipe fastening device, first align the ends of oil pipes A1 and B2 with flanges 3, insert the double-ended studs 4 into the corresponding holes of flange 3, and then tighten the bolts 5 for initial fixation. Next, fit the protective shell 18 onto the outer surface of flange 3. Utilizing the cooperation between the insert block 20 and the groove 19, adjacent protective shells 18 are spliced ​​together. Spring C 22 provides elastic force to ensure a tight connection of the protective shells 18. The sliding plate A 23 is located at the top of the protective shell 18, and the spring D 25 in the groove 24 supports the sealing ring 26, ensuring it fits tightly against the top of the protective shell 18, enhancing sealing performance.

[0034] The protective shell 18 is filled with a cotton 27 to wrap the bolts 5 and the double-sided studs 4, which serves as a buffer and shock absorber. Then, another set of protective shells 18 is spliced ​​and fitted onto the outer surface of another set of flanges 3. The upper and lower sets of protective shells 18 are then brought into contact. By moving the protective shells 18 relative to each other, the racks 42 of both sets of double-sided plates can be inserted into the fixed grooves 29. The movement of the racks 42 drives the gear A 30 to rotate. Then, the rotation of the gear A 30 drives the fixed cylinder 31 and the moving column 33 to rotate. Subsequently, the rotation of the moving column 33 drives the ratchet 34 to rotate. At the same time, the rotation of the ratchet 34 drives the pawl 36 to move. The movement of the pawl 36 drives the spring F 37 to compress and reset repeatedly.

[0035] Furthermore, the pawl 36 drives the gear B 38 to rotate, and the rotation of the gear B 38 drives the gear ring 39 and the sliding plate B 40 to reciprocate. After the surfaces of the upper and lower protective shells 18 are in close contact, the pawl 36 can lock the ratchet 34. Due to the one-way meshing characteristic of the pawl 36 and the ratchet 34, the fastening force can be prevented from loosening, ensuring that the protective shell 18 firmly wraps the flange 3, thus completing the installation and fastening operation of the entire oil guide pipe fastening device.

[0036] When inspecting the pipeline, first press the pressing column 35 with your hand. The movement of the pressing column 35 drives the ratchet 34 to move, which in turn drives the moving column 33 to move. The movement of the moving column 33 then causes the spring E 32 to retract, which in turn pushes the sliding plate B 40. The movement of the sliding plate B 40 drives the gear ring 39 to rotate, which in turn drives the gear B 38 to rotate. The rotation of the gear B 38 then drives the pawl 36 to rotate, which in turn causes the spring F 37 to retract. Afterward, the hand is released from the pressing column 35, and the return movement of the spring E 32 drives the ratchet 34 to return to its original position. Finally, the hand pulls the protective shell 18 to detach the upper and lower sets of protective shells 18.

[0037] Then slide the sliding plate A 23. The rotation of the sliding plate A 23 drives the insertion block 20 to move. Then the movement of the insertion block 20 drives the slider 21 to move synchronously. The movement of the slider 21 drives the spring C 22 to contract. At this time, the insertion block 20 is separated from the adjacent protective shell 18, and the left and right sets of protective shells 18 can be separated. At this time, the adapting cotton 27 that wraps the bolts 5 and the double-sided studs 4 inside the protective shell 18 is also removed. Finally, the bolts 5 and the double-sided studs 4 are separated from the flange 3 by using a wrench, so that the internal parts of the oil guide pipe A 1 and the oil guide pipe B 2 can be maintained.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A transformer pressure relief valve oil pipe fastening device, comprising an oil pipe A (1) and an oil pipe B (2), characterized in that: One end of the oil guide pipe A (1) and the oil guide pipe B (2) are welded with flanges (3) and the two sets of flanges (3) are tightly fitted together. The flanges (3) are fitted with bidirectional studs (4) and the outer surface of the bidirectional studs (4) is rotatably connected with bolts (5).

2. The transformer pressure relief valve oil pipe fastening device according to claim 1, characterized in that: An arc-shaped block A (6) and an arc-shaped block B (7) are placed on the outer surface of the oil guide tube B (2). An insertion groove (8) is opened through the inner surface of the arc-shaped block A (6) and the arc-shaped block B (7). A moving rod (9) is fitted inside the insertion groove (8). A stop plate (10) is installed at one end of the moving rod (9). The stop plate (10) is arc-shaped and its surface is in close contact with the surface of the oil guide tube B (2). A spring A (11) is fitted on the outer surface of the moving rod (9). The spring A (11) is fitted inside the arc-shaped block A (6) and the arc-shaped block B (7). Limiting posts (12) are installed on the outer surfaces of block A (6) and arc-shaped block B (7). A spring plate (13) is sleeved on the outer surface of the limiting post (12), and the rear end of the moving rod (9) is in close contact with the inner surface of the spring plate (13). A limiting plate (14) is provided at the contact point of the outer surface of one end of arc-shaped block A (6) and arc-shaped block B (7). The other end of the limiting plate (14) is sleeved inside the fixing plate (15). A spring B (16) is installed on the surface of the limiting plate (14). The arc-shaped block A (6) and arc-shaped block B (7) are fixedly connected to the limiting plate (14) by a pin (17).

3. The transformer pressure relief valve oil pipe fastening device according to claim 1, characterized in that: The outer surface of the flange (3) is fitted with a protective shell (18). A groove (19) is provided on the side surface of the protective shell (18). An insertion block (20) is fitted inside the groove (19). A slider (21) is installed on the side end of the insertion block (20). A spring C (22) is fitted inside the groove (19) and the spring C (22) is placed in an arc shape. A sliding plate A (23) is installed at the top of the insertion block (20). A placement groove (24) is provided at the bottom end of the sliding plate A (23). A spring D (25) and a sealing ring (26) are fitted inside the placement groove (24). An adaptable cotton (27) is placed inside the protective shell (18), and bolts (5) and double studs (4) are fitted inside the adaptable cotton (27). A fixing block (28) is fixedly installed at the center point of the side end of the protective shell (18). A fixing groove (29) is provided at the bottom end of the fixing block (28). Gear A (30) is fitted inside the fixed groove (29). A fixed cylinder (31) is fixedly installed at the rear end of gear A (30). Spring E (32) is fitted inside the fixed cylinder (31). Moving column (33) is fitted inside the fixed cylinder (31). Ratchet (34) is installed at one end of moving column (33). Pressing column (35) is installed on the front end surface of ratchet (34). Pawl (36) is fitted inside the fixed groove (29). Spring F (37) is installed near the front end of pawl (36). Gear B (38) is fixedly installed at the front end of pawl (36). Gear ring (39) is fitted inside the fixed groove (29). Sliding plate B (40) is installed on the outer surface of gear ring (39). Sliding plate B (40) is arc-shaped. Sealant (41) is provided on the contact surface of the protective shell (18). Rack (42) is installed at the bottom end of fixed block (28).

4. The transformer pressure relief valve oil pipe fastening device according to claim 3, characterized in that: The sealant (41) is applied to multiple contact surfaces of the protective shell (18). The protective shell (18) is semi-circular in shape and there are four sets of protective shells (18), all of which are fitted on the outer surface of the flange (3) and are symmetrically distributed on the outer surface of the flange (3).

5. The transformer pressure relief valve oil pipe fastening device according to claim 3, characterized in that: The surface of the rack (42) meshes with the surface of the gear A (30), the surface of the gear B (38) meshes with the surface of the gear ring (39), the sliding plate B (40) is arc-shaped and fits against the surface of the fixing block (28), the fixing groove (29) penetrates the top of the fixing block (28) and the sliding plate B (40) covers the penetrating fixing groove (29).

6. The transformer pressure relief valve oil pipe fastening device according to claim 3, characterized in that: The number of springs F (37), pawls (36) and gears B (38) are multiple and are distributed in a circular pattern inside the fixed groove (29). The surface of the pawl (36) meshes with the surface of the ratchet (34). One end of the spring F (37) is connected and fixed to the surface of the fixed groove (29), and the other end of the spring F (37) is connected and fixed to the surface of the pawl (36).

7. The transformer pressure relief valve oil pipe fastening device according to claim 3, characterized in that: The outer surface of the movable column (33) is fitted with a limiting strip, which is sleeved inside the fixed cylinder (31). One end of the spring E (32) is connected and fixed to the inner surface of the fixed cylinder (31), and the other end of the spring E (32) is connected and fixed to one end of the movable column (33). The pressing column (35) is sleeved outside the fixed block (28).

8. The transformer pressure relief valve oil pipe fastening device according to claim 3, characterized in that: The insertion block (20) is inserted into the groove (19) of another set of protective shells (18). One end of the spring C (22) is connected and fixed to the surface of the slider (21), and the other end of the spring C (22) is connected and fixed to the inner surface of the groove (19). The sliding plate A (23) is placed on the top of the protective shell (18). The sealing ring (26) is tightly fitted to the inner surface of the placement groove (24) and its bottom end is tightly fitted to the top surface of the protective shell (18). One end of the spring D (25) is connected and fixed to the inner surface of the placement groove (24), and the other end of the spring D (25) is connected and fixed to the top surface of the sealing ring (26), and there are multiple sets of them.

9. The transformer pressure relief valve oil pipe fastening device according to claim 2, characterized in that: One end of the spring A (11) is connected and fixed to the surface of the moving rod (9), and the other end of the spring A (11) is connected and fixed to the interior of the arc block A (6) and the arc block B (7). The initial state of the spring A (11) is the compressed state. The surface of the abutment (10) is provided with anti-slip texture. The number of abutment (10), moving rod (9), and spring plate (13) are all multiple sets and are distributed in a circular pattern inside and outside the arc block A (6) and the arc block B (7). One end of the arc block B (7) is fitted inside the arc block A (6).

10. A transformer pressure relief valve oil pipe fastening device according to claim 2, characterized in that: The surface of the fixed plate (15) is provided with a sliding groove, and the other end of the sliding groove and the limiting plate (14) are both "T" shaped. Both ends of the spring B (16) are connected and fixed to the surface of the limiting plate (14). The initial state of the spring B (16) is the compressed state.

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