A sealing test device for a transformer radiator

Abstract

The utility model discloses a kind of sealing test device of transformer radiator, it is related to transformer radiator sealing test field, be located on radiator, radiator includes first oil collecting pipe, second oil collecting pipe, including sealing structure, sealing is located on first oil collecting pipe, sealing is located on second oil collecting pipe, and sealing connection with external air source;This kind of sealing test device of transformer radiator is sealed with injection structure by sealing structure, realizes the reliable sealing of oil collecting pipe and stable injection, can simplify dismounting process, improve test efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of transformer radiator sealing test, specifically a transformer radiator sealing test device. Background Technology

[0002] Transformer radiators are the core components for heat dissipation and cooling during transformer operation. They are filled with insulating oil to achieve heat exchange and insulation protection. Currently, most transformer radiators adopt a welded structure, and the oil collection pipes at both ends are weak points in the seal, requiring strict airtightness testing before leaving the factory.

[0003] Traditional airtightness testing requires sealing the oil collection pipe port with a welding sealing plate and installing an airtight pressure pipe on one end of the sealing plate. After the test, the sealing plate and pressure pipe need to be cut and removed. This process is not only cumbersome and time-consuming, but the welding operation can also damage the oil collection pipe. In addition, the welding joint has poor sealing reliability, which affects the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a sealing test device for transformer radiators. This device achieves reliable sealing and stable gas injection of the oil collection pipe through a sealing structure and an air injection structure, which simplifies the disassembly and assembly process and improves testing efficiency and accuracy.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a sealing performance testing device for a transformer radiator, which is installed on the radiator, the radiator including a first oil collection pipe and a second oil collection pipe, including a sealing structure, which is sealed on the first oil collection pipe; The air injection structure is sealed on the second oil collection pipe and is sealed to an external air source.

[0006] In some embodiments, the sealing structure includes a sealing sleeve fitted onto the first oil collecting pipe; A connector is provided between the sealing sleeve and the first oil collecting pipe; A sealing assembly is provided at the opening of the first oil collection pipe.

[0007] In some embodiments, the connector includes a connecting boss disposed on the side wall of the sealing sleeve; The connecting screw hole passes through the connecting boss and extends into the sealing sleeve; A connecting bolt is screwed into the connecting bolt hole, and one end of the connecting bolt abuts against the first oil collection pipe.

[0008] In some embodiments, the sealing assembly includes a sealing bracket disposed at the end of the sealing sleeve away from the first oil collection pipe; A sealing plate is slidably mounted on the sealing bracket; A sealing ring is disposed between the sealing plate and the sealing sleeve; A sealing element is provided on the sealing bracket.

[0009] In some embodiments, the seal includes a sealing screw hole extending through the top of the sealing bracket; A sealing screw is screwed into the sealing screw hole, and the bottom of the sealing screw is pressed against the sealing plate.

[0010] In some embodiments, the diameters of the sealing plate and the sealing ring are both larger than the inner diameter of the sealing sleeve.

[0011] In some embodiments, the gas injection structure includes a gas injection sleeve sleeved on the second oil collection pipe; An injection boss is provided on the side wall of the injection sleeve; The air injection screw hole penetrates the air injection sleeve and extends into the air injection sleeve; The air injection bolt is screwed into the air injection screw hole, and one end of the air injection bolt abuts against the second oil collection pipe; The air injection support is located at the end of the air injection sleeve away from the second oil collection pipe; A baffle is slidably mounted on the gas injection bracket; A sealing ring is disposed between the baffle and the air injection sleeve; The air injection screw hole penetrates the top of the air injection bracket; The air injection screw is screwed into the air injection screw hole, and the bottom of the air injection screw is pressed against the baffle. An air injection connector is provided on the baffle plate, and the air outlet of the air injection connector passes through the baffle plate and the sealing ring.

[0012] In some embodiments, the outer diameters of the baffle and the sealing ring are both larger than the inner diameter of the gas injection sleeve, and the inner diameter of the sealing ring is smaller than the inner diameter of the gas injection sleeve.

[0013] In summary, this utility model has the following beneficial effects: This invention allows for the fixing of the sealing sleeve to the first oil manifold using connecting bolts, and the fixing of the air injection sleeve to the second oil manifold using an air injection bolt. A sealing screw drives a sealing plate to seal the opening of the first oil manifold, and another air injection screw drives a baffle to seal the opening of the second oil manifold, thus achieving a radiator seal. The radiator can be injected into the air manifold via an air injection connector connected to an external air source. This eliminates the need for welding sealing plates and pressurization pipes, enabling sealing tests and simplifying the disassembly and assembly process, thereby improving testing efficiency and accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model connected to the heat sink; Figure 2 This is a structural schematic diagram of the present invention connected to the heat sink from another perspective; Figure 3 This is a schematic diagram of the sealing structure of this utility model; Figure 4 This is a schematic diagram of the gas injection structure of this utility model.

[0015] In the diagram: 1. Radiator; 11. First oil collection pipe; 12. Second oil collection pipe; 2. Sealing structure; 21. Sealing sleeve; 22. Connecting boss; 23. Connecting bolt; 24. Sealing bracket; 25. Sealing plate; 26. Sealing ring; 27. Sealing screw; 3. Air injection structure; 31. Air injection sleeve; 32. Air injection boss; 33. Air injection bolt; 34. Air injection bracket; 35. Baffle; 36. Sealing ring; 37. Air injection screw; 38. Air injection connector. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] refer to Figure 1-4 A sealing performance testing device for a transformer radiator is disclosed, used to test the sealing performance of the transformer radiator. The device is mounted on a radiator 1, which includes a first oil collecting pipe 11 and a second oil collecting pipe 12. The testing device includes a sealing structure 2 and an injection structure 3. Through the synergistic action of the sealing structure 2 and the injection structure 3, the first oil collecting pipe 11 is sealed and the second oil collecting pipe 12 is injected with gas, providing a stable sealing environment for the airtightness test. The sealing structure 2 is correspondingly sealed at the end of the first oil collecting pipe 11, blocking the gas flow between the first oil collecting pipe 11 and the outside, thus creating a closed space inside the radiator 1. The injection structure 3 is correspondingly sealed at the end of the second oil collecting pipe 12, with one end sealed to an external gas source. This not only blocks the gas exchange between the second oil collecting pipe 12 and the outside but also injects test gas into the radiator 1, meeting the airtightness test requirements.

[0018] In some embodiments, the sealing structure 2 includes a sealing sleeve 21, a connector, and a sealing assembly. The sealing sleeve 21 is a cylindrical structure adapted to the outer diameter of the first oil collection pipe 11, coaxially sleeved at the end of the first oil collection pipe 11, with its inner wall fitting against the outer wall of the first oil collection pipe 11 to form a preliminary seal and radial positioning base, preventing subsequent component installation misalignment. The sealing sleeve 21 can be made of Q5 steel or 304 stainless steel, possessing sufficient strength to withstand the tightening force of the subsequent connector and the pressing force of the sealing assembly. The connector is located between the sealing sleeve 21 and the first oil collection pipe 11, enabling a fixed connection between the sealing sleeve 21 and the first oil collection pipe 11, preventing the sealing sleeve 21 from sliding during testing and causing seal failure. The sealing assembly is correspondingly sealed at the opening of the first oil collection pipe 11, directly covering the open end of the first oil collection pipe 11, blocking gas from entering or exiting from the opening, ensuring a reliable seal with the first oil collection pipe 11.

[0019] In some embodiments, the connector includes a connecting boss 22, a connecting screw hole, and a connecting bolt 23. The connecting boss 22 protrudes outward along the radial direction of the sealing sleeve 21 and can be integrally formed with the sealing sleeve 21 or welded to provide an installation carrier for the connector. Multiple connecting bosses 22 can be evenly distributed along the circumference of the sealing sleeve 21 to improve the balance of force during fixing. The connecting screw hole penetrates the connecting boss 22 radially along the sealing sleeve 21 and extends into the sealing sleeve 21. The screw hole of the connecting screw hole can be M20. Its hole diameter is compatible with the connecting bolt 23, providing an installation channel for the connecting bolt 23. The connecting bolt 23 is screwed into the connecting bolt hole. The connecting bolt 23 can be made of high-strength carbon steel. After the sealing sleeve 21 is installed in place, tighten the connecting bolt 23 so that the end of it close to the first oil collection pipe 11 abuts against the outer wall of the first oil collection pipe 11. The tightening force of the bolt firmly fixes the sealing sleeve 21 and the first oil collection pipe 11, preventing them from sliding relative to each other and achieving rigid fixation of the sealing sleeve 21 and the first oil collection pipe 11.

[0020] In some embodiments, the sealing assembly includes a sealing bracket 24, a sealing plate 25, a sealing ring 26, and a sealing element. The sealing bracket 24 may be a U-shaped frame structure, fixedly disposed at the end of the sealing sleeve 21 away from the first oil collection pipe 11, and can be connected by welding. The two support rods connecting the sealing bracket 24 and the sealing sleeve 21 can provide sliding support and directional restriction for the sealing plate 25. The sealing plate 25 may be a circular plate structure with sliding holes on both sides. The support rods of the sealing bracket 24 pass through the sliding holes, and the sealing plate 25 can slide axially along the support rods of the sealing bracket 24, directly covering the opening of the first oil collection pipe 11 to block gas flow. The sealing ring 26... It can be an elastic seal, preferably made of nitrile rubber or fluororubber, and is located between the sealing plate 25 and the sealing sleeve 21. The sealing ring 26 fills the gap between the sealing plate 25 and the sealing sleeve 21 by its own deformation, thereby improving the sealing reliability of the pipe opening. The sealing ring 26 can be provided with grooves on both sides, and the support rod of the sealing bracket 24 is provided in the groove. It can slide along the support rod, and at the same time, it is convenient to disassemble the sealing ring 26 and the sealing bracket 24, so as to facilitate the replacement of the sealing ring 26 after wear. The seal is located on the sealing bracket 24 and can drive the sealing plate 25 to slide along the guide groove towards the sealing sleeve 21, so that the sealing ring 26 fits tightly against the end of the sealing sleeve 21, ensuring stable sealing pressure.

[0021] In some embodiments, the seal includes a sealing screw hole and a sealing screw 27, enabling precise clamping and convenient disassembly of the sealing plate 25. The sealing screw hole extends through the top of the sealing bracket 24 along its axial direction, and the axis of the screw hole is coaxial with the axis of the sealing sleeve 21, providing an installation and transmission channel for the sealing screw 27. The sealing screw 27 is screwed into the sealing screw hole, and its bottom extends to the inside of the sealing bracket 24 and contacts the upper surface of the sealing plate 25. When the sealing screw 27 is rotated clockwise, the screw moves downward along the axial direction, pushing the sealing plate 25 to slide towards the sealing sleeve 21, so that the sealing ring 26 is compressed and tightly fits the sealing sleeve 21. When the sealing screw 27 is rotated counterclockwise, the screw moves upward, relieving the pressure on the sealing plate 25, facilitating the installation and disassembly of the sealing assembly.

[0022] In some embodiments, the diameters of the sealing plate 25 and the sealing ring 26 are both larger than the inner diameter of the sealing sleeve 21, which can ensure that the sealing plate 25 and the sealing ring 26 can completely cover the opening of the sealing sleeve 21 to form a complete sealing surface and avoid edge leakage.

[0023] In some embodiments, the specific structure of the gas injection structure 3 is similar to that of the sealing structure 2, except that a new gas injection channel is added to meet the gas injection requirements and ensure the sealing compatibility with the second oil collection pipe 12. Specifically, it includes a gas injection sleeve 31, a gas injection boss 32, a gas injection screw hole, a gas injection bolt 33, a gas injection bracket 34, a baffle 35, a sealing ring 36, a gas injection screw 37, and a gas injection connector 38. The gas injection sleeve 31 has the same structure and dimensions as the sealing sleeve 21 of the sealing structure 2, and is coaxially sleeved at the end of the second oil collection pipe 12 to form a preliminary seal and radial positioning. The gas injection boss 32 is connected to the connecting boss 22 of the sealing structure 2. The structure is consistent with that of the gas injection sleeve 31, which protrudes radially outward to provide an installation carrier for the gas injection connector; the gas injection screw hole is consistent with the structure of the connecting screw hole of the sealing structure 2, and extends radially through the gas injection boss 32 and to the inner wall of the gas injection sleeve 31, providing an installation channel for the gas injection bolt 33; the gas injection bolt 33 is consistent with the structure of the connecting bolt 23 of the sealing structure 2, and is screwed into the gas injection screw hole, with one end abutting against the outer wall of the second oil collection pipe 12 to fix the gas injection sleeve 31 to the second oil collection pipe 12; the gas injection bracket 34 is consistent with the structure of the sealing bracket 24 of the sealing structure 2, and is fixedly installed on the gas injection sleeve. The end of pipe 31 furthest from the second oil collection pipe 12 provides sliding support for the baffle 35. The baffle 35 has the same structure as the sealing plate 25 of the sealing structure 2 and can slide along the support rod of the air injection bracket 34 to cover the opening of the second oil collection pipe 12. The sealing ring 36 is made of the same material as the sealing ring 26 and is located between the baffle 35 and the air injection sleeve 31 to achieve a seal between the baffle 35 and the air injection sleeve 31. Grooves can be provided on both sides of the sealing ring 36, and the support rod of the air injection bracket 34 is provided in the grooves to facilitate the replacement of the sealing ring 36 after wear. The air injection screw hole has the same structure as the sealing screw hole of the sealing structure 2 and penetrates the top of the air injection bracket 34. The part provides an installation channel for the gas injection screw 37. The gas injection screw 37 has the same structure as the sealing screw 27 of the sealing structure 2 and is screwed into the gas injection screw hole. Its bottom is pressed onto the baffle 35 to drive the baffle 35 to press the sealing ring 36. The gas injection connector 38 is a tubular connector with a sealing structure, which is fixed on the baffle 35 and sealed at the connection with the baffle 35. It can be a C-type quick connector PP10. Its air outlet passes through the baffle 35 and the sealing ring 36 in sequence and communicates with the inside of the second oil collection pipe 12. The air inlet is sealed to the external air source to realize the function of injecting test gas into the radiator 1.

[0024] In some embodiments, the outer diameters of the baffle 35 and the sealing ring 36 are both larger than the inner diameter of the gas injection sleeve 31, and the inner diameter of the sealing ring 36 is smaller than the inner diameter of the gas injection sleeve 31. This ensures that the baffle 35 and the sealing ring 36 can completely cover the opening of the gas injection sleeve 31, preventing gas from leaking from the edge during the gas injection process.

[0025] The specific working principle is as follows: The transformer radiator to be processed is vertically suspended by a gantry crane, so that the ports of the first oil collection pipe 11 and the second oil collection pipe 12 are horizontal, which facilitates the installation of the sealing structure 2 and the air injection structure 3.

[0026] The sealing sleeve 21 is fitted onto the end of the first oil collection pipe 11, so that the opening of the first oil collection pipe 11 protrudes from the sealing sleeve 21. The connecting bolt 23 on the connecting boss 22 is tightened. The sealing sleeve 21 is fixed on the first oil collection pipe 11 by the tightening force at the end of the connecting bolt 23. The sealing screw 27 on the sealing bracket 24 is rotated clockwise to push the sealing plate 25 to slide along the support rod toward the sealing sleeve 21 until the sealing ring 26 is compressed and tightly fits the opening of the first oil collection pipe 11, completely sealing the opening of the first oil collection pipe 11.

[0027] The air injection sleeve 31 is fitted onto the end of the second oil collection pipe 12, so that the opening of the second oil collection pipe 12 protrudes from the air injection sleeve 31. The air injection bolt 33 on the air injection boss 32 is tightened, consistent with the fixing logic of the sealing structure 2. The air injection sleeve 31 is fixed on the second oil collection pipe 12 by tightening the air injection bolt 33. The air injection screw 37 is rotated to push the baffle 35 to compress the sealing ring 36, so that the sealing ring 36 fits against the opening of the second oil collection pipe 12. At this time, the baffle 35 and the sealing ring 36 form a seal on the second oil collection pipe 12, and the air outlet of the air injection connector 38 is connected to the inside of the second oil collection pipe 12.

[0028] Connect the high-pressure hose of the external air source to the air inlet of the air injection connector 38 in a sealed manner. Open the valve on the air injection connector and inject compressed air or nitrogen into the radiator 1, selecting the appropriate option according to the test requirements. Simultaneously monitor the injection pressure using the pressure gauge on the air source. The test pressure is typically 0.1-0.2 MPa. Once the internal pressure of the radiator reaches the set value, close the valve of the air injection connector 38 and the external air source. Maintain a stable pressure, typically for 10-30 minutes. Observe the pressure gauge reading during the pressure maintenance period: if the pressure remains unchanged, it indicates that there are no leaks in the first oil collection pipe 11, the second oil collection pipe 12, and the welded joints of the radiator 1, and the sealing performance is qualified; if the pressure drops, it indicates that there is a leak point, and it is necessary to check the sealing structure 2, the sealing of the air injection structure 3, or the welded joints of the radiator body, repair them, and then retest.

[0029] After the test is completed, first open the valve of the air injection connector 38 to release the internal pressure of the radiator, then rotate the air injection screw 37 counterclockwise to release the clamping of the baffle 35 and disassemble the air injection structure 3; rotate the sealing screw 27 counterclockwise to release the clamping of the sealing plate 25 and disassemble the sealing structure 2; clean the sealing ring 26 and sealing ring 36 for the next test.

[0030] In some embodiments, after the airtightness test is completed, the air injection structure 3 on the second oil collection pipe 12 is disassembled. Following the same steps, a sealing structure 2 is installed on the second oil collection pipe 12 to complete the sealing. The radiator, with both the first oil collection pipe 11 and the second oil collection pipe 12 sealed by the sealing structure 2, is then fed into a shot blasting machine via a gantry crane for pre-blasting treatment. Because both the first oil collection pipe 11 and the second oil collection pipe 12 are reliably sealed by the tooling, iron sand generated during shot blasting cannot enter the radiator through the first oil collection pipe 11 and the second oil collection pipe 12, effectively preventing iron sand residue. After shot blasting, the radiator is removed from the shot blasting machine by a gantry crane, the sealing structure 2 is disassembled, and the radiator can then be sent to the next processing step (such as painting or assembly).

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 utility model.

Claims

1. A sealing performance testing device for a transformer radiator, disposed on a radiator (1), the radiator (1) comprising a first oil collecting pipe (11) and a second oil collecting pipe (12), characterized in that: Includes a sealing structure (2), which is sealed on the first oil collection pipe (11); The air injection structure (3) is sealed on the second oil collection pipe (12) and sealed to the external air source.

2. The sealing performance testing device for a transformer radiator according to claim 1, characterized in that: The sealing structure (2) includes a sealing sleeve (21) which is sleeved on the first oil collecting pipe (11); A connector is provided between the sealing sleeve (21) and the first oil collecting pipe (11); A sealing assembly is provided at the port of the first oil collection pipe (11).

3. The sealing performance testing device for a transformer radiator according to claim 2, characterized in that: The connector includes a connecting boss (22) disposed on the side wall of the sealing sleeve (21); The connecting screw hole passes through the connecting boss (22) and extends into the sealing sleeve (21); The connecting bolt (23) is screwed into the connecting bolt hole, and one end of the connecting bolt (23) abuts against the first oil collection pipe (11).

4. The sealing performance testing device for a transformer radiator according to claim 2, characterized in that: The sealing assembly includes a sealing bracket (24) disposed at the end of the sealing sleeve (21) away from the first oil collection pipe (11); The sealing plate (25) is slidably disposed on the sealing bracket (24); A sealing ring (26) is disposed between the sealing plate (25) and the sealing sleeve (21); A seal is provided on the sealing bracket (24).

5. The sealing performance testing device for a transformer radiator according to claim 4, characterized in that: The seal includes a sealing screw hole that extends through the top of the sealing bracket (24); The sealing screw (27) is screwed into the sealing screw hole, and the bottom of the sealing screw (27) is pressed onto the sealing plate (25).

6. The sealing performance testing device for a transformer radiator according to claim 4, characterized in that: The diameters of the sealing plate (25) and the sealing ring (26) are both larger than the inner diameter of the sealing sleeve (21).

7. The sealing performance testing device for a transformer radiator according to claim 1, characterized in that: The gas injection structure (3) includes a gas injection sleeve (31), which is sleeved on the second oil collection pipe (12); An air injection boss (32) is provided on the side wall of the air injection sleeve (31); The air injection screw hole penetrates the air injection sleeve (31) and extends into the air injection sleeve (31); The air injection bolt (33) is screwed into the air injection screw hole, and one end of the air injection bolt (33) abuts against the second oil collection pipe (12); The gas injection support (34) is located at the end of the gas injection sleeve (31) away from the second oil collection pipe (12); A baffle (35) is slidably mounted on the gas injection bracket (34); A sealing ring (36) is provided between the baffle (35) and the air injection sleeve (31); The air injection screw hole penetrates the top of the air injection bracket (34); The air injection screw (37) is screwed into the air injection screw hole, and the bottom of the air injection screw (37) is pressed against the baffle (35); An air injection connector (38) is provided on the baffle (35), and the air outlet of the air injection connector (38) passes through the baffle (35) and the sealing ring (36).

8. The sealing performance testing device for a transformer radiator according to claim 7, characterized in that: The outer diameters of the baffle (35) and the sealing ring (36) are both larger than the inner diameter of the gas injection sleeve (31), while the inner diameter of the sealing ring (36) is smaller than the inner diameter of the gas injection sleeve (31).

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