A gas insulation device drum tee sealing assembly structure

Abstract

A sealing assembly structure for a gas-insulated tee includes a tee body and three external connecting pipes connected to the tee body. Each connection interface between the tee body and the external connecting pipes is equipped with a double sealing structure, which includes a sealing rubber ring and a metal sealing ring. The sealing rubber ring is located between the tee body and the external connecting pipe interface, and the metal sealing ring is located on the outer ring of the interface. Both ends of the metal sealing ring are equipped with identical elastic rubber gaskets. A locking and reinforcing device is provided around the metal sealing ring. A flow guide plate is fixed on the inner wall of the tee body interface, with one half of the flow guide plate extending into the external connecting pipe. The other half is connected to an extension ring plate that penetrates into a limiting ring plate, which is fixed to the inner wall of the external connecting pipe. This sealing assembly structure improves sealing performance through a double sealing design and enhances the strength of the sealing structure through the design of the flow guide plate and the locking and reinforcing device.

Description

Technical Field

[0001] This utility model relates to the field of high voltage electrical equipment technology, specifically to a structure of a gas insulation equipment drum three-way sealing assembly. Background Technology

[0002] Gas-insulated equipment is widely used in power systems. It is filled with a pressurized insulating gas, such as sulfur hexafluoride, to achieve good insulation and arc-extinguishing performance. The drum tee, as a crucial component of gas-insulated equipment, connects different pipelines, and its sealing performance directly affects the safe and stable operation of the gas-insulated equipment. However, the sealing assembly structure of the drum tee in existing gas-insulated equipment still has some shortcomings:

[0003] 1. Traditional drum tee sealing methods mostly use a single sealing ring structure. The single sealing structure has the problem of poor sealing reliability. Especially during long-term use, if the sealing ring ages or deforms, it will lead to a decrease in sealing performance and cause gas leakage.

[0004] 2. Traditional drum tee seals, due to insufficient sealing structure strength during long-term use, are easily affected by factors such as vibration and high-pressure impact, which can cause the seals to loosen or shift, further increasing the risk of leakage. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a gas insulation equipment drum three-way sealing component structure. This structure improves the sealing performance through a double sealing design, and enhances the sealing structure strength and improves the vibration and impact resistance through the design of the diversion plate and locking reinforcement device.

[0006] The technical solution adopted in this utility model is a sealing assembly structure for a gas-insulated tee valve, including a tee valve body and three external connecting pipes connected to the tee valve body. Each connection interface between the tee valve body and the external connecting pipes is provided with a double sealing structure, which includes a sealing rubber ring and a metal sealing ring. The sealing rubber ring is located between the tee valve body and the interface of the external connecting pipes, and the metal sealing ring is located on the outer ring of the interface of the tee valve body and the external connecting pipes. The two ends of the metal sealing ring are glued with the same elastic rubber gaskets. A locking and reinforcing device is provided around the metal sealing ring. A drainage plate is fixed on the inner wall of the interface of the tee valve body. The other half of the drainage plate extends into the external connecting pipes, and the extension ring plate connected to the other half extends into the limiting ring plate. The limiting ring plate is fixed on the inner wall of the external connecting pipes.

[0007] The locking and reinforcing device includes a first sealing ring plate and a second sealing ring plate that seal and press against a metal sealing ring. The first sealing ring plate is fixed to the outer wall of the interface of the drum tee body. An alignment block is inserted into the first sealing ring plate. The alignment block is fixed to the side of the second sealing ring plate. The second sealing ring plate is fixed to the outer wall of the interface of the external connecting pipe. Both the first and second sealing ring plates are located in an annular protective groove. The annular protective groove is located at the bottom of the outer protective ring plate. One end of the outer protective ring plate is fixed to the outer wall of the drum tee body. Fixing blocks are evenly distributed on the other end of the outer protective ring plate. The fixing blocks are fixed to the back plate strip by fastening bolts and fastening nuts. The back plate strip is fixed to the outer wall of the external connecting pipe.

[0008] The metal sealing ring has two parts, left and right, located in two bottom annular holes. The two bottom annular holes are located on the bottom of the first sealing ring plate and the second sealing ring plate, respectively. The height of the bottom annular holes is the same as the height of the metal sealing ring. The sum of the lengths of the two bottom annular holes is 1-1.5 mm less than the sum of the lengths of the metal sealing ring and the two elastic rubber gaskets. The first sealing ring plate is also provided with alignment holes, in which alignment blocks are inserted. The size of the alignment holes is equal to the size of the alignment blocks.

[0009] Most of the fastening bolts are located in the first screw hole and the second screw hole. The first screw hole is located inside the fixing block, and the second screw hole is located inside the back plate strip.

[0010] The extended ring plate extends into the limiting annular hole, which is located at the bottom of the limiting ring plate. The outermost end of the extended ring plate abuts against the bottom of the limiting ring plate, and the height of the extended ring plate is equal to the height of the limiting annular hole.

[0011] The cross-section of the drainage plate is arc-shaped.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts a dual sealing structure of sealing rubber ring and metal sealing ring. If the sealing performance of one of them decreases due to aging, deformation, etc., the other can still maintain the sealing effect, which significantly improves the reliability of the seal. It can withstand high air pressure and temperature cycles for a long time and solves the problem of poor sealing reliability of single sealing structure.

[0013] In this invention, an extension ring plate, a limiting ring plate, a diversion plate, and a locking and reinforcing device are provided. After the extension ring plate extends into the bottom of the limiting ring plate, the diversion plate can be stabilized at the connection interface between the drum tee body and the external connecting pipe, which plays the role of diverting high-pressure gas and preventing high-pressure gas from impacting the connection interface. At the same time, the diversion plate, together with the locking and reinforcing device, can keep the position of the sealing rubber ring and the metal sealing ring stable at all times, which can prevent the sealing rubber ring and the metal sealing ring from loosening or shifting, thereby improving the overall sealing structure strength.

[0014] In this invention, the design of the alignment block and alignment hole in the locking and reinforcing device helps to speed up the installation of the drum tee body and the external connecting pipe. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 2 This is a front view of the outer protective ring plate and fixing block of this utility model.

[0017] Figure 3 This is a front view of the bottom annular insertion hole and the alignment insertion hole of this utility model.

[0018] Figure 4 This is a front view schematic diagram of the back plate strip and the second sealing ring plate of this utility model.

[0019] In the diagram: 1. Drum tee body, 2. Elastic rubber gasket, 3. First sealing ring plate, 4. Alignment block, 5. Outer protective ring plate, 6. Fastening nut, 7. Fixing block, 8. Fastening bolt, 9. Back plate strip, 10. Second sealing ring plate, 11. Metal sealing ring, 12. External connecting pipe, 13. Sealing rubber ring, 14. Extension ring plate, 15. Limiting ring plate, 16. Drainage plate, 17. Bottom annular insertion hole, 18. Alignment insertion hole, 19. First screw hole, 20. Annular protective groove, 21. Second screw hole, 22. Limiting annular hole. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] Referring to the accompanying drawings, a gas-insulated equipment drum tee sealing assembly structure includes a drum tee body 1 and three external connecting pipes 12 connected to the drum tee body 1. Each connection interface between the drum tee body 1 and the external connecting pipes 12 is provided with a double sealing structure. The double sealing structure includes a sealing rubber ring 13 and a metal sealing ring 11. The sealing rubber ring 13 is located between the drum tee body 1 and the interface of the external connecting pipes 12. The metal sealing ring 11 is located on the outer ring of the interface of the drum tee body 1 and the external connecting pipes 12. The two ends of the metal sealing ring 11 are glued with the same elastic rubber gasket 2. A locking and reinforcing device is provided around the metal sealing ring 11. A drainage plate 16 is fixed on the inner wall of the interface of the drum tee body 1. The other half of the drainage plate 16 extends into the external connecting pipe 12, and the other half is connected to an extension ring plate 14 that extends into a limiting ring plate 15. The limiting ring plate 15 is fixed on the inner wall of the external connecting pipe 12.

[0022] The locking and reinforcing device includes a first sealing ring plate 3 and a second sealing ring plate 10 that seal and press against the metal sealing ring 11. The first sealing ring plate 3 is fixed to the outer wall of the interface of the drum tee body 1. An alignment block 4 is inserted into the first sealing ring plate 3. The alignment block 4 is fixed to the side of the second sealing ring plate 10. The second sealing ring plate 10 is fixed to the outer wall of the interface of the external connecting pipe 12. Both the first sealing ring plate 3 and the second sealing ring plate 10 are located in the annular protective groove 20. The annular protective groove 20 is located at the bottom of the outer ring protective ring plate 5. One end of the outer ring protective ring plate 5 is fixed to the outer wall of the drum tee body 1. Fixing blocks 7 are evenly distributed on the other end of the outer ring protective ring plate 5. The fixing blocks 7 are fixed to the back plate strip 9 by fastening bolts 8 and fastening nuts 6. The back plate strip 9 is fixed to the outer wall of the external connecting pipe 12.

[0023] The metal sealing ring 11 has two parts, left and right, located in two bottom annular holes 17. The two bottom annular holes 17 are located on the bottom of the first sealing ring plate 3 and the second sealing ring plate 10, respectively. The height of the bottom annular holes 17 is the same as the height of the metal sealing ring 11. The sum of the lengths of the two bottom annular holes 17 is less than the sum of the lengths of the metal sealing ring 11 and the two elastic rubber gaskets 2 by 1-1.5 mm. The first sealing ring plate 3 is also provided with an alignment hole 18. An alignment block 4 is inserted into the alignment hole 18. The size of the alignment hole 18 is equal to the size of the alignment block 4.

[0024] Most of the fastening bolts 8 are located in the first screw hole 19 and the second screw hole 21. The first screw hole 19 is located in the fixing block 7, and the second screw hole 21 is located in the back plate strip 9.

[0025] The extended ring plate 14 extends into the limiting annular hole 22, which is located on the bottom of the limiting ring plate 15. The outermost end of the extended ring plate 14 abuts against the bottom of the limiting ring plate 15, and the height of the extended ring plate 14 is equal to the height of the limiting annular hole 22.

[0026] The cross-section of the drainage plate 16 is arc-shaped.

[0027] The principle of the sealing assembly structure of the gas insulation equipment drum tee is as follows: The three ports of the drum tee body 1 are all connected to the external connecting pipe 12. A sealing ring 13 is pressed at the connection end of the drum tee body 1 and the external connecting pipe 12 to form the first seal. A metal sealing ring 11 is provided around the outer ring of the connection end of the drum tee body 1 and the external connecting pipe 12. The metal sealing ring 11 is pressed by the first sealing ring plate 3 and the second sealing ring plate 10, so that the metal sealing ring 11 fits tightly with the connection end to form the second seal, which improves the sealing effect.

[0028] When insulating gas with a certain pressure passes through the connection end between the drum tee body 1 and the external connecting pipe 12, the guide plate 16 allows the insulating gas to pass under it, which can prevent the insulating gas from directly contacting the connection end between the drum tee body 1 and the external connecting pipe 12, avoid the impact of the insulating gas on the connection end, protect the sealing ring 13, and prevent the sealing ring 13 from shifting inward, thus helping to improve the sealing effect of the sealing ring 13.

[0029] The outer protective ring plate 5 and the back plate strip 9 in the locking and reinforcing device are locked and fixed by the fastening bolts 8 and the fastening nuts 6, which can stabilize the position of the first sealing ring plate 3 and the second sealing ring plate 10, thereby stabilizing the metal sealing ring 11 at the outer ring of the connection end between the drum tee body 1 and the external connecting pipe 12. This provides protection for the metal sealing ring 11, preventing it from being corroded by the external environment and avoiding the possibility of displacement of the metal sealing ring 11. It also prevents the sealing ring 13 from shifting outward, further improving the sealing effect of the metal sealing ring 11 and the sealing ring 13.

[0030] During maintenance, unscrew the fastening nut 6 from the fastening bolt 8 to remove the fastening bolt 8. Then, pull the external connecting pipe 12 outward, and the alignment block 4 will leave the alignment hole 18. The second sealing ring plate 10 will leave the metal sealing ring 11, and the extension ring plate 14 will leave the limiting annular hole 22. After the external connecting pipe 12 is completely removed, the metal sealing ring 11 can be removed from the bottom annular hole 17 on the bottom of the first sealing ring plate 3 for replacement. Then, the sealing rubber ring 13 can also be removed for replacement.

[0031] In this invention, a dual sealing structure of sealing rubber ring 13 and metal sealing ring 11 is adopted. If the sealing performance of one of them decreases due to aging, deformation, etc., the other can still maintain the sealing effect, which significantly improves the reliability of the seal. It can withstand high air pressure and temperature cycles for a long time and solves the problem of poor sealing reliability of a single sealing structure.

[0032] In this utility model, an extension ring plate 14, a limiting ring plate 15, a diversion plate 16, and a locking and reinforcing device are provided. After the extension ring plate 14 is inserted into the bottom of the limiting ring plate 15, the diversion plate 16 can be stabilized at the connection interface between the drum tee body 1 and the external connecting pipe 12, which plays the role of diverting high-pressure gas and preventing high-pressure gas from impacting the connection interface. At the same time, the diversion plate 16, together with the locking and reinforcing device, can keep the position of the sealing rubber ring 13 and the metal sealing ring 11 stable at all times, which can prevent the sealing rubber ring 13 and the metal sealing ring 11 from loosening or shifting, and improve the overall sealing structure strength.

[0033] In this invention, the design of the alignment block 4 and alignment hole 18 in the locking and reinforcing device is beneficial to speeding up the installation of the drum tee body 1 and the external connecting pipe 12.

[0034] The above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas insulated device drum tee seal assembly structure, comprising a drum tee body (1) and three external connection pipes (12) connected with the drum tee body (1), characterized in that: Each connection interface between the drum tee body (1) and the external connecting pipe (12) is provided with a double sealing structure. The double sealing structure includes a sealing rubber ring (13) and a metal sealing ring (11). The sealing rubber ring (13) is located between the drum tee body (1) and the external connecting pipe (12) interface. The metal sealing ring (11) is located on the outer ring of the drum tee body (1) and the external connecting pipe (12) interface. The two ends of the metal sealing ring (11) are glued with the same elastic rubber gasket (2). The metal sealing ring (11) is provided with a locking and reinforcing device around it. A drainage plate (16) is fixed on the inner wall of the drum tee body (1) interface. The other half of the drainage plate (16) extends into the external connecting pipe (12), and the other half is connected to an extension ring plate (14) that penetrates into a limiting ring plate (15). The limiting ring plate (15) is fixed on the inner wall of the external connecting pipe (12).

2. The gas insulated apparatus tee-seal assembly structure of claim 1, wherein: The locking and reinforcing device includes a first sealing ring plate (3) and a second sealing ring plate (10) that seal and press against the metal sealing ring (11). The first sealing ring plate (3) is fixed on the outer wall of the interface of the drum tee body (1). An alignment block (4) is inserted into the first sealing ring plate (3). The alignment block (4) is fixed on the side of the second sealing ring plate (10). The second sealing ring plate (10) is fixed on the outer wall of the interface of the external connecting pipe (12). The second sealing ring plate (10) is located in the annular protective groove (20). The annular protective groove (20) is located at the bottom of the outer ring protective ring plate (5). One end of the outer ring protective ring plate (5) is fixed on the outer wall of the drum tee body (1). Fixing blocks (7) are evenly distributed on the other end of the outer ring protective ring plate (5). The fixing blocks (7) are fixed to the back plate strip (9) by fastening bolts (8) and fastening nuts (6). The back plate strip (9) is fixed on the outer wall of the external connecting pipe (12).

3. The structure of the gas insulation equipment drum tee sealing assembly according to claim 2, characterized in that: The metal sealing ring (11) has two parts, one on the left and one on the right, located in two bottom annular holes (17). The two bottom annular holes (17) are located on the bottom of the first sealing ring plate (3) and the second sealing ring plate (10). The height of the bottom annular holes (17) is the same as the height of the metal sealing ring (11). The length of the two bottom annular holes (17) is less than the length of the metal sealing ring (11) and the two elastic rubber gaskets (2) by 1-1.5 mm. The first sealing ring plate (3) is also provided with a positioning hole (18). A positioning block (4) is inserted into the positioning hole (18). The size of the positioning hole (18) is equal to the size of the positioning block (4).

4. The structure of the gas insulation equipment drum tee sealing assembly according to claim 2, characterized in that: Most of the fastening bolts (8) are located in the first screw hole (19) and the second screw hole (21). The first screw hole (19) is located in the fixing block (7), and the second screw hole (21) is located in the back plate strip (9).

5. The structure of the gas insulation equipment drum tee sealing assembly according to claim 1, characterized in that: The extended ring plate (14) extends into the limiting annular hole (22), the limiting annular hole (22) is located on the bottom of the limiting ring plate (15), the outermost end of the extended ring plate (14) abuts against the bottom of the limiting ring plate (15), and the height of the extended ring plate (14) is equal to the height of the limiting annular hole (22).

6. The structure of the gas insulation equipment drum tee sealing assembly according to claim 1, characterized in that: The cross-section of the drainage plate (16) is arc-shaped.

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