A new type of transformer pressure relief valve mounting structure

Abstract

This utility model relates to a novel installation structure for a transformer pressure relief valve, including a transformer oil tank and a pressure relief valve. A cylindrical seat communicating with the interior of the transformer oil tank is fixed to the top of the tank. The cylindrical seat extends vertically and has an installation port at its top. A groove is located within the installation port. A locking block is fixed to the outer peripheral wall of the pressure relief valve. The bottom of the pressure relief valve is fitted into the installation port. The locking block is detachably locked into the groove. A sealing mechanism is located below the pressure relief valve inside the cylindrical seat. This utility model replaces traditional bolt fastening with a detachable design of the locking block and groove. The bottom of the pressure relief valve is embedded into the installation port at the top of the cylindrical seat, and locking is achieved by rotation. Disassembly is achieved by reversing the operation, improving disassembly and assembly efficiency and making operation convenient. A sealing mechanism consisting of a ball, shaft, and handle is located below the pressure relief valve inside the cylindrical seat. During disassembly and assembly, turning the handle moves the ball, allowing the through hole to horizontally cut off the passage and vertically connect to the cylindrical seat. No oil draining is required throughout the process, saving time and manpower.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a novel installation structure for a transformer pressure relief valve. Background Technology

[0002] The pressure relief valve is a key pressure protection device for transformers. It is usually installed on the top of the transformer tank. Once the transformer experiences excessive pressure inside the tank due to a fault, the pressure relief valve will open immediately, releasing the pressure by spraying oil from the tank. This effectively prevents the tank from bursting and protects the safe operation of the transformer.

[0003] During the long service life of a transformer, the pressure relief valve needs to be replaced and maintained multiple times. Because the pressure relief valve is directly connected to the inside of the transformer, the transformer often needs to drain the internal insulating oil to a position below the pressure relief valve during disassembly and assembly, which is time-consuming and labor-intensive. In addition, traditional pressure relief valves are installed by fastening with multiple bolts, which is not conducive to quick disassembly and assembly. Utility Model Content

[0004] The purpose of this utility model is to provide a novel installation structure for a transformer pressure relief valve, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A novel transformer pressure relief valve installation structure includes a transformer oil tank and a pressure relief valve. A cylindrical seat communicating with the interior of the transformer oil tank is fixed on the top of the tank. The cylindrical seat extends vertically and has an installation port on the top. The installation port has a groove. A locking block is fixed on the outer peripheral wall of the pressure relief valve. The bottom of the pressure relief valve is fitted into the installation port. The locking block is detachably locked in the groove. A sealing mechanism is provided inside the cylindrical seat below the pressure relief valve to seal the cylindrical seat when the pressure relief valve is disassembled.

[0007] Furthermore, the sealing mechanism includes a ball, and a ball groove is provided in the cylinder below the installation port. The ball is fitted into the ball groove and has a through hole inside. When the ball rotates to the point where the through hole extends vertically, the through hole communicates with the inside of the cylinder. When the ball rotates to the point where the through hole extends horizontally, both ends of the through hole are blocked by the inner wall of the ball groove.

[0008] Furthermore, the side of the cylinder seat is provided with a mounting hole that connects to the ball groove. A shaft is rotatably installed in the mounting hole. One end of the shaft is fixed to the outer wall of the ball groove, and the other end extends to the outer side of the cylinder seat and is fitted with a handle.

[0009] Furthermore, a rubber sleeve is provided on the outside of the shaft, and the outer peripheral wall of the rubber sleeve is fixed to the inner wall of the mounting hole, with the shaft and the rubber sleeve having an interference fit.

[0010] Furthermore, a mounting bracket A is fixed on the outer peripheral wall of the handle, and a screw is movably inserted on the mounting bracket A. A first screw hole matching the screw thread is provided on the outer wall of the cylinder seat. When the ball rotates to the point where the through hole extends vertically, the screw and the first screw hole are aligned.

[0011] Furthermore, the outer wall of the cylinder is provided with a second threaded hole that matches the screw thread. When the ball rotates to the horizontal extension of the through hole, the screw and the second threaded hole are aligned.

[0012] Furthermore, two limiting bosses are symmetrically fixed on the inner wall of the mounting port, and a groove is formed below the two limiting bosses in the mounting port. Two locking blocks are symmetrically fixed on the outer peripheral wall of the pressure relief valve, and two clearance openings corresponding to the positions of the two locking blocks are formed between the ends of the two limiting bosses.

[0013] Furthermore, a mounting bracket B is fixed on the outer peripheral wall of the pressure relief valve, and a pin is vertically and movably inserted on the mounting bracket B. A retaining plate is fixed on the outer peripheral wall of the cylinder seat, and the retaining plate is provided with a socket for the pin to be inserted. When the pin is aligned with the socket, the two retaining blocks abut against the lower surfaces of the two limiting bosses respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0015] This utility model replaces the traditional multiple bolt fastening method with a detachable locking design of locking block and locking slot. The bottom of the pressure relief valve is embedded into the mounting port on the top of the cylinder seat. By rotating the pressure relief valve, the locking block and the clearance port are misaligned. The locking block is quickly locked by the contact of the limiting boss. When disassembling, the locking block is pulled out after being rotated in the opposite direction to align with the clearance port. This greatly improves the disassembly and assembly efficiency of the pressure relief valve and makes the operation convenient and quick.

[0016] This invention features a sealing mechanism located below the pressure relief valve within the cylinder seat. The mechanism comprises a ball, shaft, and handle. During installation and removal of the pressure relief valve, the ball rotates by turning the handle. When the ball's through-hole extends horizontally, both ends are blocked by the inner wall of the ball groove, cutting off the internal passage of the cylinder seat and preventing oil from overflowing from the transformer tank. After installation, rotating the ball allows the through-hole to extend vertically and connect with the inside of the cylinder seat, enabling normal operation. The entire process eliminates the need to drain insulating oil from the transformer tank, saving significant time and labor costs.

[0017] This utility model features a mounting bracket B fixed to the outer peripheral wall of the pressure relief valve, and a clamping plate fixed to the outer peripheral wall of the cylinder seat. The pin on the mounting bracket B can be inserted into the insertion hole of the clamping plate to secure the pressure relief valve, preventing it from deflecting randomly during use and causing the clamping block to come out of the relief port. This ensures the stability of the pressure relief valve after installation and guarantees the reliable operation of the transformer pressure protection function.

[0018] In this invention, the cylinder seat provides both an installation position for the sealing mechanism and an installation position for the pressure relief valve, saving material costs and achieving two goals at once. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 The diagram shown omits the transformer and mailbox. Figure 3 for Figure 2 One of the schematic diagrams of a partial cross-section of the structure shown; Figure 4 for Figure 2 The second schematic diagram of a partial cross-section of the structure shown; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point A in the diagram.

[0020] In the diagram: 1. Transformer oil tank; 2. Pressure relief valve; 3. Cylinder seat; 31. Mounting port; 32. Limiting boss; 33. Clearance port; 34. Slot; 35. Block; 4. Sealing mechanism; 41. Ball groove; 42. Ball; 43. Through hole; 44. Shaft; 441. Mounting hole; 442. Rubber sleeve; 45. Handle; 46. Mounting bracket A; 47. Screw; 48. First screw hole; 49. Second screw hole; 51. Mounting bracket B; 52. Pin; 53. Clamping plate; 54. Insertion hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0023] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0024] Please see Figures 1-5 This utility model provides a novel transformer pressure relief valve installation structure, including a transformer oil tank 1 and a pressure relief valve 2. A cylindrical seat 3 communicating with the interior of the transformer oil tank 1 is fixed on the top of the transformer oil tank 1. The cylindrical seat 3 extends vertically and has an installation port 31 on the top. The installation port 31 has a groove 34. A locking block 35 is fixed on the outer peripheral wall of the pressure relief valve 2. The bottom of the pressure relief valve 2 is fitted into the installation port 31. The locking block 35 is detachably locked into the groove 34. A sealing mechanism 4 is provided in the cylindrical seat 3 below the pressure relief valve 2 to seal the cylindrical seat 3 when the pressure relief valve 2 is disassembled.

[0025] When installing the pressure relief valve 2, it is fitted into the mounting port 31 and secured by the locking block 35 into the slot 34. The locking block 35 also allows for easy disassembly. When disassembling the pressure relief valve 2, the sealing mechanism 4 is rotated to seal the cylinder seat 3, preventing oil from overflowing from the transformer tank 1. After installation, the sealing mechanism 4 is rotated back to its original position, releasing the seal on the cylinder seat 3, allowing it to be put into use. This eliminates the need for draining oil during installation and disassembly of the pressure relief valve 2.

[0026] Specifically, the sealing mechanism 4 includes a ball 42. A ball groove 41 is provided in the cylinder seat 3 below the mounting port 31. The ball 42 is fitted into the ball groove 41. A through hole 43 is provided in the ball 42. When the ball 42 rotates to the point where the through hole 43 extends vertically, the through hole 43 communicates with the inside of the cylinder seat 3. When the ball 42 rotates to the point where the through hole 43 extends horizontally, both ends of the through hole 43 are blocked by the inner wall of the ball groove 41.

[0027] The side of the cylinder base 3 is provided with a mounting hole 441 that is connected to the ball groove 41. A shaft 44 is rotatably installed in the mounting hole 441. One end of the shaft 44 is fixed to the outer wall of the ball groove 41, and the other end extends to the outer side of the cylinder base 3 and is fitted with a handle 45.

[0028] By squeezing the handle 45 and turning the shaft 44, the shaft 44 drives the ball 42 to rotate in the ball groove 41, thus allowing the ball 42 and the through hole 43 to be rotated and adjusted as a whole. When the through hole 43 is rotated to the vertical position, the through hole 43 is connected to the inside of the cylinder seat 3, meaning the cylinder seat 3 is not blocked. Combined with the pressure relief valve 2 in place, it can operate normally. When the through hole 43 is rotated to the horizontal position, both ends of the through hole 43 are blocked by the inner wall of the ball groove 41, and the rest of the ball 42 cuts off and blocks the inside of the cylinder seat 3, preventing the oil in the transformer oil tank 1 from overflowing from the cylinder seat 3 when the pressure relief valve 2 is disassembled and installed. Therefore, there is no need to drain the oil when disassembling and installing the pressure relief valve 2.

[0029] Specifically, a rubber sleeve 442 is rotatably fitted on the outside of the shaft 44. The outer peripheral wall of the rubber sleeve 442 is fixed to the inner wall of the mounting hole 441. The shaft 44 and the rubber sleeve 442 are interference-fitted. By adding the rubber sleeve 442 between the shaft 44 and the mounting hole 441, and the rubber sleeve 442 and the shaft 44 are interference-fitted, not only is a sealing effect achieved, but also damping is provided for the rotation adjustment of the shaft 44, preventing the shaft 44 from deflecting arbitrarily during adjustment.

[0030] Specifically, a mounting bracket A46 is fixed on the outer peripheral wall of the handle 45, and a screw 47 is movably inserted on the mounting bracket A46. A first screw hole 48 matching the thread of the screw 47 is provided on the outer wall of the cylinder seat 3. When the ball 42 rotates to the point where the through hole 43 extends vertically, the screw 47 and the first screw hole 48 are aligned.

[0031] The outer wall of the cylinder base 3 is provided with a second screw hole 49 that matches the thread of the screw 47. When the ball 42 rotates to the horizontal extension of the through hole 43, the screw 47 and the second screw hole 49 are aligned.

[0032] When adjusting the through hole 43 to a horizontal extended state to disassemble and assemble the pressure relief valve 2, align the screw 47 with the second screw hole 49 and screw the screw 47 into the second screw hole 49 to secure the shaft 44 and the handle 45, preventing the ball 42 from deflecting and causing the through hole 43 to connect with the cylinder seat 3, resulting in oil overflow. When adjusting the through hole 43 to a horizontal state for operation, align the screw 47 with the first screw hole 48 and screw the first screw hole 48 into the second screw hole 49 to secure the shaft 44 and the handle 45, preventing the ball 42 from deflecting and causing the cylinder seat 3 to be blocked.

[0033] Specifically, two limiting protrusions 32 are symmetrically fixed on the inner wall of the mounting port 31, and a slot 34 is formed inside the mounting port 31 below the two limiting protrusions 32. Two locking blocks 35 are symmetrically fixed on the outer peripheral wall of the pressure relief valve 2, and two clearance openings 33 corresponding to the positions of the two locking blocks 35 are formed between the ends of the two limiting protrusions 32.

[0034] Insert the bottom of the pressure relief valve 2 into the mounting port 31, ensuring that the two locking blocks 35 correspond one-to-one with the two clearance ports 33. Then press the pressure relief valve 2 downwards, causing the two locking blocks 35 to pass through the clearance ports 33 and enter the locking grooves 34 below the limiting boss 32. Next, rotate the pressure relief valve 2 to misalign the two locking blocks 35 with the clearance ports 33. The limiting boss 32 abuts against the locking blocks 35 to lock the pressure relief valve 2 in place. To disassemble, simply rotate the pressure relief valve 2 to align the locking blocks 35 with the clearance ports 33, and then pull the pressure relief valve 2 out of the mounting port 31. This allows for quick and easy disassembly and assembly of the pressure relief valve 2.

[0035] Specifically, a mounting bracket B51 is fixed on the outer peripheral wall of the pressure relief valve 2. A pin 52 is vertically and movably inserted into the mounting bracket B51. A retaining plate 53 is fixed on the outer peripheral wall of the cylinder seat 3. The retaining plate 53 is provided with a socket 54 for the pin 52 to be inserted. When the pin 52 is aligned with the socket 54, the two retaining blocks 35 abut against the lower surfaces of the two limiting protrusions 32 respectively. By inserting the pin 52 into the socket 54, the pressure relief valve 2 can be tightened, preventing the pressure relief valve 2 from deflecting arbitrarily and causing the retaining blocks 35 to come out from the relief port 33, thus ensuring the stability of the pressure relief valve 2 during installation.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel transformer pressure relief valve mounting structure, comprising a transformer oil tank (1) and a pressure relief valve (2), characterized in that: The transformer tank (1) is fixed with a cylindrical base (3) communicating with its interior, and the cylindrical base (3) extends vertically. The top of the cylinder seat (3) has an installation port (31), the installation port (31) has a slot (34), and a locking block (35) is fixed on the outer peripheral wall of the pressure relief valve (2). The pressure relief valve (2) is fitted into the mounting port (31) at the bottom, and the locking block (35) is detachably locked into the locking groove (34); The cylinder seat (3) is provided with a sealing mechanism (4) located below the pressure relief valve (2) for sealing the cylinder seat (3) when the pressure relief valve (2) is disassembled.

2. The novel transformer pressure relief valve installation structure according to claim 1, characterized in that: The blocking mechanism (4) includes a sphere (42); The cylinder base (3) is provided with a ball groove (41) located below the mounting port (31), and the ball (42) is fitted into the ball groove (41); The sphere (42) has a through hole (43) inside. When the sphere (42) rotates to the point where the through hole (43) extends vertically, the through hole (43) communicates with the inner wall of the cylinder seat (3). When the sphere (42) rotates to the point where the through hole (43) extends horizontally, both ends of the through hole (43) are blocked by the inner wall of the ball groove (41).

3. The novel transformer pressure relief valve installation structure according to claim 2, characterized in that: The side of the cylinder seat (3) is provided with an installation hole (441) that communicates with the ball groove (41). A shaft (44) is rotatably installed in the installation hole (441). One end of the shaft (44) is fixed to the outer wall of the ball groove (41), and the other end extends to the outer side of the cylinder seat (3) and is equipped with a handle (45).

4. The novel transformer pressure relief valve installation structure according to claim 3, characterized in that: The shaft (44) is rotatably fitted with a rubber sleeve (442), and the outer peripheral wall of the rubber sleeve (442) is fixed to the inner wall of the mounting hole (441); The shaft (44) is interference-fitted with the rubber sleeve (442).

5. The novel transformer pressure relief valve installation structure according to claim 3, characterized in that: A mounting bracket A (46) is fixed on the outer peripheral wall of the handle (45), and a screw (47) is movably inserted into the mounting bracket A (46). The outer wall of the cylinder seat (3) is provided with a first screw hole (48) that matches the thread of the screw (47). When the sphere (42) rotates to the point where the through hole (43) extends vertically, the screw (47) aligns with the first screw hole (48).

6. The novel transformer pressure relief valve installation structure according to claim 5, characterized in that: The outer wall of the cylinder seat (3) is provided with a second screw hole (49) that matches the thread of the screw (47). When the ball (42) rotates to the horizontal extension of the through hole (43), the screw (47) is aligned with the second screw hole (49).

7. The novel transformer pressure relief valve installation structure according to claim 1, characterized in that: Two limiting bosses (32) are symmetrically fixed on the inner wall of the mounting port (31); The mounting port (31) forms the slot (34) below the two limiting protrusions (32); Two locking blocks (35) are symmetrically fixed on the outer peripheral wall of the pressure relief valve (2); Two clearance openings (33) are formed between the ends of the two limiting protrusions (32) and the positions of the two locking blocks (35).

8. The novel transformer pressure relief valve installation structure according to claim 7, characterized in that: The pressure relief valve (2) is fixed with a mounting bracket B (51) on its outer peripheral wall, and a pin (52) is vertically and movably inserted into the mounting bracket B (51). A retaining plate (53) is fixed on the outer peripheral wall of the cylinder base (3), and the retaining plate (53) is provided with a socket (54) for the pin (52) to be inserted. When the pin (52) is aligned with the socket (54), the two locking blocks (35) respectively abut against the lower surfaces of the two limiting protrusions (32).

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