Explosion relief valve device of oil-immersed transformer

Abstract

The utility model provides an oil-immersed transformer explosion relief valve device, which relates to the technical field of explosion relief valves, and comprises a pipeline and an explosion relief valve body arranged at the top of the pipeline, the inner wall of the pipeline is provided with a diversion trench, a buffer component is arranged in the inner cavity of the pipeline, and the buffer component comprises a mounting block arranged on the inner wall of the pipeline. A containing groove is formed in an inner cavity of the mounting block, a connecting piece is arranged in an inner cavity of the containing groove, and one end of the connecting piece is fixedly connected with a first elastic piece. Hot oil in the oil tank passes through the pipeline along the inner cavity of the flow guide groove, when the hot oil collides with the inner wall of the pipeline, generated stress is transmitted to the connecting piece through the mounting block, at the moment, the second elastic piece is compressed, and therefore the stress generated by collision can be buffered.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof safety valve technology, and in particular to an explosion-proof safety valve device for oil-immersed transformers. Background Technology

[0002] Explosion-proof safety valves for oil-immersed transformers are commonly used on the top of the transformer tank. When a fault occurs inside the transformer, such as a short circuit or overload, causing a sudden increase in pressure, the device can quickly open to release the pressure, preventing the tank from rupturing and exploding due to excessive pressure. This effectively protects the transformer body, surrounding equipment, and personnel, ensuring the stable operation of the power system.

[0003] In practical applications, existing explosion-proof safety valve devices for oil-immersed transformers, used in conjunction with pressure relief valves and gas relays, can meet the basic requirements for high-voltage protection of oil-immersed transformers. However, the following problems still exist:

[0004] Common explosion-proof safety valve devices for oil-immersed transformers are installed on top of the transformer tank. When the transformer is in operation, the hot oil in the tank will continuously heat up and generate strong convection currents. When passing through the pipe of the safety valve device, it will inevitably collide with the inner wall of the pipe, causing the sealing device at the pipe connection to be subjected to large pressure fluctuations frequently, which in turn leads to a decrease in sealing performance and oil leakage. Therefore, this application provides an explosion-proof safety valve device for oil-immersed transformers to meet the requirements. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies and provide an explosion-proof safety valve device for oil-immersed transformers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof safety valve device for an oil-immersed transformer, comprising a pipeline and an explosion-proof safety valve body disposed at the top of the pipeline, wherein a flow guide groove is provided on the inner wall of the pipeline;

[0007] A buffer assembly is placed inside the cavity of a pipe. The buffer assembly includes a mounting block disposed on the inner wall of the pipe. The inner cavity of the mounting block is provided with a placement groove. The inner cavity of the placement groove is provided with a connector. One end of the connector is fixedly connected to a first elastic element.

[0008] A sealing assembly is located at the bottom of the explosion-proof safety valve body. The sealing assembly includes a mounting base installed at the bottom of the explosion-proof safety valve body, and a sealing ring is sleeved on the outer surface of the mounting base.

[0009] A heat-conducting component is placed on the outer surface of a pipe, and the heat-conducting component includes a heat-absorbing plate installed on the side of the pipe.

[0010] Furthermore, the top and bottom of the connector are fixedly connected with second elastic elements, and the ends of the two sets of second elastic elements away from the connector are fixedly connected to the inner walls of the mounting block and the pipe, respectively.

[0011] The technical effect of adopting the above technical solution is that by setting a second elastic element, the direct stress generated by the collision can be absorbed.

[0012] Furthermore, a buffer pad is fixedly connected to the side of the connector, and the end of the first elastic member away from the connector is fixedly connected to the inner wall of the placement groove.

[0013] The technical effects of adopting the above technical solution are: by setting the first elastic element, the lateral stress generated by the collision can be absorbed; by setting the buffer pad, the position of the connecting part can be limited.

[0014] Furthermore, the inner cavity of the mounting base is provided with a first groove, and a sealing ball is provided in the inner cavity of the first groove.

[0015] The technical effect of adopting the above technical solution is that the sealing ball uses a thermal expansion material. By setting the sealing ball, it can undergo a certain amount of collision while being subjected to stress deformation caused by the collision, thereby filling the inner cavity of the first groove.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] By installing an explosion-proof safety valve body, the oil-immersed transformer can be protected. During use, the pipeline is first connected to the transformer tank pipeline. When the transformer starts, the hot oil in the tank flows through the pipeline along the inner cavity of the guide groove. When the hot oil collides with the inner wall of the pipeline, the resulting stress is transmitted to the connector through the mounting block. At this time, the second elastic element is compressed, thus buffering the stress generated by the collision. By installing a first elastic element, lateral stress can be absorbed. The cooperation of the first and second elastic elements effectively reduces the continuous impact stress of hot oil on the sealing components, preventing the sealing ring from deforming and falling off during the collision. By installing a heat-absorbing plate, the heat at the bottom can be transferred to the detection element located on the side of the explosion-proof safety valve body, thereby enabling rapid monitoring of changes in the hot oil temperature. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of the explosion-proof safety valve device for an oil-immersed transformer provided by this utility model;

[0019] Figure 2 A schematic diagram of the internal cross-sectional structure of the explosion-proof safety valve device for an oil-immersed transformer provided by this utility model;

[0020] Figure 3 A cross-sectional structural schematic diagram of the sealing assembly of the explosion-proof safety valve device for an oil-immersed transformer provided by this utility model;

[0021] Figure 4 This is a cross-sectional structural schematic diagram of the buffer assembly of the explosion-proof safety valve device for oil-immersed transformers provided by this utility model.

[0022] Legend:

[0023] 1. Pipeline; 11. Explosion-proof safety valve body; 12. Flow guide channel;

[0024] 2. Buffer assembly; 21. Mounting block; 22. Connector; 23. First elastic element; 24. Second elastic element; 25. Buffer pad block; 26. Placement slot;

[0025] 3. Sealing assembly; 31. Mounting base; 32. Sealing ring; 33. Sealing ball; 34. First groove; 35. Second groove;

[0026] 4. Heat-conducting components; 41. Heat-absorbing plate; 42. Heat-conducting parts; 43. Conducting parts. Detailed Implementation

[0027] 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.

[0028] like Figure 1 - Figure 4 As shown, this embodiment provides a technical solution: an explosion-proof safety valve device for an oil-immersed transformer, a pipeline 1 and an explosion-proof safety valve body 11 disposed at the top of the pipeline 1, and a guide groove 12 is provided on the inner wall of the pipeline 1;

[0029] Buffer assembly 2 is placed in the inner cavity of pipe 1. Buffer assembly 2 includes a mounting block 21 disposed on the inner wall of pipe 1. The inner cavity of mounting block 21 is provided with a placement groove 26. The inner cavity of placement groove 26 is provided with a connector 22. One end of connector 22 is fixedly connected to a first elastic member 23.

[0030] The sealing assembly 3 is located at the bottom of the explosion-proof safety valve body 11. The sealing assembly 3 includes a mounting base 31 installed at the bottom of the explosion-proof safety valve body 11, and a sealing ring 32 is sleeved on the outer surface of the mounting base 31.

[0031] A heat-conducting component 4 is placed on the outer surface of the pipe 1. The heat-conducting component 4 includes a heat-absorbing plate 41 installed on the side of the pipe 1. Second elastic elements 24 are fixedly connected to the top and bottom of the connector 22. The ends of the two sets of second elastic elements 24 away from the connector 22 are fixedly connected to the mounting block 21 and the inner wall of the pipe 1, respectively. A buffer pad 25 is fixedly connected to the side of the connector 22. The end of the first elastic element 23 away from the connector 22 is fixedly connected to the inner wall of the placement groove 26. By setting an explosion-proof safety valve body 11, the oil-immersed transformer can be safely protected. In use, the pipe 1 is first connected to the transformer oil tank pipe 1. When the transformer starts, the hot oil in the tank flows along the inner cavity of the guide groove 12 through the pipe 1. When the hot oil collides with the inner wall of the pipe 1, the resulting stress is absorbed by the safety valve body 11. The load 21 is transferred to the connector 22. At this time, the second elastic element 24 is compressed, which can buffer the stress generated by the collision. By setting the first elastic element 23, the lateral stress can be absorbed. Through the cooperation of the first elastic element 23 and the second elastic element 24, the impact stress caused by the hot oil on the sealing assembly 3 can be effectively reduced, and the sealing ring 32 can be prevented from deforming and falling off during the collision. During the process of the connector 22 being stressed, the position of the connector 22 can be fixed by setting the buffer pad 25, which can prevent the connector 22 from being displaced in the inner cavity of the placement groove 26. By setting the heat absorption plate 41, the heat at the bottom can be transferred to the detection element set on the side of the explosion-proof safety valve body 11, thereby enabling rapid monitoring of the hot oil temperature change.

[0032] Furthermore, such as Figure 2 and Figure 3 As shown: The inner cavity of the mounting base 31 has a first groove 34, and the inner cavity of the first groove 34 is provided with a sealing ball 33. The outer surface of the mounting base 31 also has a second groove 35. The inner cavity of the first groove 34 has a through opening. The sealing ball 33 is made of a thermally expanding material. The top of the second groove 35 is provided with a limiting member. By cooperating with the sealing ring 32 and the limiting member, the sealing ring 32 can be prevented from detaching from the inner cavity of the second groove 35. When the sealing ring 32 deforms slightly due to stress, the sealing ball 33 deforms synchronously and expands due to heat. This allows the sealing ball 33 to fill the inner cavity of the first groove 34, and then the top of the sealing ring 32 can be squeezed and fixed through the through opening, further improving the stability of the position of the sealing ring 32.

[0033] During the operation of an oil-immersed transformer, the hot oil flowing through the inner cavity of pipe 1 inevitably has a certain gap with the top of pipe 1, which causes a certain delay in the temperature transmission of the hot oil and affects the detection response efficiency of the explosion-proof safety valve body 11. Figure 2As shown: In this scheme, a heat-conducting element 42 is fixedly connected to the top of the heat-absorbing plate 41, and a conductive element 43 is fixedly connected to the side of the heat-conducting element 42 near the explosion-proof safety valve body 11. Most of the hot oil is located at the bottom and middle of the inner cavity of the pipe 1. By setting the heat-absorbing plate 41 in the middle of the outer surface of the pipe 1, the temperature of the hot oil can be quickly transferred to the outer surface of the pipe 1 for a certain amount of absorption, thereby achieving the effect of transferring the heat through the heat-conducting element 42 to the conductive element 43, effectively improving the temperature transfer speed, facilitating the detection by the temperature monitoring device set on the side of the explosion-proof safety valve, and preventing abnormal hot oil temperature in the inner cavity of the pipe 1.

[0034] Working principle: such as Figure 1-4 As shown: In use: First, connect pipe 1 to transformer oil tank pipe 1. When the transformer starts, the hot oil in the tank flows through pipe 1 along the inner cavity of the guide groove 12. When the hot oil collides with the inner wall of pipe 1, the resulting stress is transmitted to the connector 22 through the mounting block 21. At this time, the second elastic element 24 is compressed, thereby buffering the stress generated by the collision. By setting the first elastic element 23, the lateral stress can be absorbed. Through the cooperation of the first elastic element 23 and the second elastic element 24, the impact stress caused by the continuous hot oil on the sealing assembly 3 can be effectively reduced, and the sealing ring 32 can be prevented from deforming and falling off during the collision. The sealing ball 33 uses thermal expansion material. When the sealing ring 32 deforms slightly due to stress, the sealing ball 33 deforms synchronously and expands due to heat. This allows the sealing ball 33 to fill the inner cavity of the first groove 34, thereby pressing and fixing the top of the sealing ring 32 through the through-hole, further improving the stability of the sealing ring 32's position. By setting a heat-absorbing plate 41 in the middle of the outer surface of the pipe 1, a certain amount of the temperature transferred from the hot oil to the outer surface of the pipe 1 can be absorbed, thereby achieving the effect of transferring the heat through the heat-conducting component 42 to the heat-conducting component 43. This effectively improves the temperature transfer speed and facilitates the detection by the temperature monitoring device installed on the side of the explosion-proof safety valve, preventing abnormal hot oil temperature in the inner cavity of the pipe 1.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model 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 utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An explosion-proof safety valve device for oil-immersed transformers, characterized in that, include: Pipeline (1) and explosion-proof safety valve body (11) installed at the top of pipeline (1), with a flow guide groove (12) opened on the inner wall of pipeline (1). A buffer assembly (2) is placed in the inner cavity of the pipe (1). The buffer assembly (2) includes an installation block (21) disposed on the inner wall of the pipe (1). The inner cavity of the installation block (21) is provided with a placement groove (26). The inner cavity of the placement groove (26) is provided with a connector (22). One end of the connector (22) is fixedly connected to a first elastic member (23). A sealing assembly (3) is placed at the bottom of the explosion-proof safety valve body (11). The sealing assembly (3) includes a mounting base (31) installed at the bottom of the explosion-proof safety valve body (11). A sealing ring (32) is fitted on the outer surface of the mounting base (31). A heat-conducting component (4) is placed on the outer surface of the pipe (1), and the heat-conducting component (4) includes a heat-absorbing plate (41) installed on the side of the pipe (1).

2. The explosion-proof safety valve device for oil-immersed transformers according to claim 1, characterized in that, The top and bottom of the connector (22) are fixedly connected with second elastic elements (24), and the ends of the two sets of second elastic elements (24) away from the connector (22) are fixedly connected to the inner walls of the mounting block (21) and the pipe (1), respectively.

3. The explosion-proof safety valve device for oil-immersed transformers according to claim 1, characterized in that, A buffer pad (25) is fixedly connected to the side of the connector (22), and the end of the first elastic member (23) away from the connector (22) is fixedly connected to the inner wall of the placement groove (26).

4. The explosion-proof safety valve device for oil-immersed transformers according to claim 3, characterized in that, The inner cavity of the mounting base (31) is provided with a first groove (34), and the inner cavity of the first groove (34) is provided with a sealing ball (33).

5. The explosion-proof safety valve device for oil-immersed transformers according to claim 4, characterized in that, The outer surface of the mounting base (31) is also provided with a second groove (35).

6. The explosion-proof safety valve device for oil-immersed transformers according to claim 1, characterized in that, A heat-conducting component (42) is fixedly connected to the top of the heat-absorbing plate (41), and a conductive component (43) is fixedly connected to the side of the heat-conducting component (42) near the explosion-proof safety valve body (11).

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