Automatic compensation fluorine-lined sampling ball valve
By using the sealing structure of the slope design and the automatic compensation function in the fluorine sampling ball valve, the problem of decreased and medium leakage of traditional fluorine -sampling ball valves is solved, and higher sealing performance and safety are achieved.
Patent Information
- Application Number
- CN202420182404.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-25
AI Technical Summary
After a long period of use, traditional fluorine-lined sampling ball valves will produce tiny gaps due to wear between the valve stem and the sealing filler, resulting in the risk of dynamic seal failure and media leakage, especially in the scenarios where strongly corrosive media are used. Sex is difficult to guarantee.
Design a automatic compensation sampling ball valve, which uses a slope -designed valve covering fluorine layer, stainless steel wedge block, PTFE wedge block and dish spring device to form a sealing cavity and use the automatic elastic compensation function of the butterfly spring. Automatically adjust the cover to ensure the sealing performance.
Through the automatic compensation function, the cover can be automatically adjusted when the sealing is available to ensure that the valve stem is tightly sealed, the medium is leaked, and the sealing performance and safety are improved.
Smart Images
Figure CN222416163U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of valves, and in particular relates to a fluorine-lined sampling ball valve with an automatic compensation function, which is suitable for highly corrosive media. Background Art
[0002] Fluorine-lined sampling ball valves are mainly used for sampling of highly corrosive media such as acids and alkalis. The valve body, PTFE valve seat, ball, valve stem, the inner wall of the valve body channel, the surface of the ball, the inner wall of the channel and other parts in contact with the medium are lined with fluorine materials and have corrosion resistance. The valve stem of a traditional fluorine-lined sampling ball valve rotates relative to the valve stem during operation, which will cause wear between the valve stem and the sealing packing. After a long period of wear, there will be a tiny gap, which will cause the dynamic seal of the valve stem and the sealing packing to fail, and there will be a risk of medium leakage. In particular, the media in the application scenarios of fluorine-lined sampling ball valves are usually highly dangerous, and safety is difficult to guarantee. Summary of the invention
[0003] The utility model aims to design an automatic compensating fluorine-lined sampling ball valve with excellent sealing performance in view of the defects of the prior art.
[0004] The technical scheme of the utility model comprises a main valve body, an auxiliary valve body, a valve cover, a ball, and a valve stem. The main valve body, the auxiliary valve body, the valve cover, the ball, the valve stem, and the surfaces in contact with the medium fluid are lined with polytetrafluoroethylene linings. The upper end of the auxiliary valve body is connected to the main valve body, and the lower end of the auxiliary valve body is connected to a sampling device. A polytetrafluoroethylene valve seat that cooperates with the spherical surface of the ball is arranged in the inner cavity of the auxiliary valve body. The valve stem and the ball adopt an integrated structure. The ball is provided with a sampling cavity. The fluorine lining layer of the valve cover is sealed with the valve stem and the spherical surface of the ball. The fluorine lining layer of the valve cover, the valve stem, The valve stem and the packing gland cooperate with each other to form a sealing cavity. The main reason is that the valve cover fluorine lining layer adopts an inclined surface design. The inclined surface layer is located in the sealing cavity. A stainless steel wedge block, a PTFE wedge block and a disc spring device are arranged in the sealing cavity. The stainless steel wedge block is sleeved on the valve stem and seals with the valve stem. The lower wedge surface of the stainless steel wedge block seals with the inclined surface of the valve cover fluorine lining layer. The PTFE wedge block is arranged in the cavity formed between the upper wedge surface of the stainless steel wedge block and the valve cover. The lower wedge of the PTFE wedge block The PTFE wedge block is sealed with the wedge surface on the stainless steel wedge block, the upper surface of the PTFE wedge block is sealed with the inner wall of the valve cover, a disc spring device is provided between the stainless steel wedge block and the packing gland, the disc spring is arranged between the two butterfly plates, the two butterfly plates are respectively in contact with the stainless steel wedge block and the packing gland, and the packing gland is tightly sleeved on the valve stem by the valve cover; the sampling device comprises a connecting plate, a connecting block, a PTFE adapter and a sampling bottle, the connecting plate, the auxiliary valve body and the main valve body are fixedly connected by a plurality of through bolts, a polytetrafluoroethylene valve seat fixing ring is provided between the connecting plate and the auxiliary valve body, the polytetrafluoroethylene valve seat fixing ring is sealed with the contact surface of the ball, a through hole is provided in the middle of the connecting plate, the upper end of the PTFE adapter is inserted in the through hole, the connecting plate and the PTFE adapter are fixedly connected through the connecting block, a sampling channel connected to the ball is provided in the middle of the PTFE adapter, a threaded hole matching the threaded mouth of the sampling bottle is provided at the lower end of the PTFE adapter, and the sampling bottle and the PTFE adapter are fixedly connected by threads.
[0005] Preferably, a polyfluoride sealing ring is provided between the stainless steel wedge block, the valve stem and the fluorine lining layer of the valve cover.
[0006] Preferably, a threaded hole is provided on the side of the PTFE adapter, and the exhaust pipe bracket is fixedly connected to the PTFE adapter through the threaded hole. An exhaust pipe is provided in the exhaust pipe bracket, and the exhaust pipe passes through the side of the PTFE adapter and is connected to the sampling channel.
[0007] Preferably, a sealing ring is provided between the PTFE adapter and the polytetrafluoroethylene valve seat fixing ring.
[0008] Preferably, the spherical surface of the ball is completely sealed and fitted with the inner cavity wall of the auxiliary valve body. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 , Figure 2 It is a structural schematic diagram of the utility model.
[0010] In the figure, 1, main valve body, 2, fluorine lining layer of valve cover, 3, PTFE wedge block, 4, valve cover, 5, stainless steel wedge block 5, 6, valve stem, 7, packing gland, 8, butterfly plate, 9, disc spring, 10, ball, 11, sampling chamber, 12, PTFE valve seat, 13, auxiliary valve body, 14, connecting plate, 15, connecting block, 16, PTFE adapter, 17, sampling bottle, 18, sampling channel, 19, valve seat fixing ring, 20, sealing ring, 21, exhaust pipe, 22, exhaust pipe bracket, 23, PTFE sealing ring. DETAILED DESCRIPTION
[0011] The utility model is further described according to the accompanying drawings.
[0012] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0013] like Figure 1The automatic compensating fluorine-lined sampling ball valve shown comprises a main valve body 1, an auxiliary valve body 13, a valve cover 4, a ball 10, and a valve stem 6. The surfaces of the main valve body 1, the auxiliary valve body 13, the valve cover 4, the ball 10, the valve stem 6 in contact with the medium fluid are all lined with polytetrafluoroethylene linings. The upper end of the auxiliary valve body 13 is connected to the main valve body 1, and the lower end of the auxiliary valve body 13 is connected to the sampling device. A polytetrafluoroethylene valve seat 12 that cooperates with the spherical surface of the ball 10 is arranged in the inner cavity of the auxiliary valve body 13. The valve stem 6 and the ball 10 adopt an integrated structure. The ball 10 is provided with a sampling cavity 11. The fluorine-lined layer 2 of the valve cover is sealed with the valve stem 6 and the spherical surface of the ball 10. The fluorine-lined layer 2 of the valve cover, the valve stem 6, the valve stem 6, and the packing gland 7 cooperate with each other to form a sealed cavity. The main reason is that the fluorine-lined layer 2 of the valve cover adopts an inclined surface design, and the inclined surface layer is located in the sealed cavity. A stainless steel wedge block 5, a PTFE wedge block 3 and a disc spring device are provided in the sealing cavity. The stainless steel wedge block 5 is sleeved on the valve stem 6 and sealed with the valve stem 6. The lower wedge surface of the stainless steel wedge block 5 is sealed with the inclined layer of the valve cover fluorine lining layer 2. The PTFE wedge block 3 is arranged in the cavity formed between the upper wedge surface of the stainless steel wedge block 5 and the valve cover 4. The lower wedge surface of the PTFE wedge block 3 is sealed with the upper wedge surface of the stainless steel wedge block 5. The upper surface of the PTFE wedge block 3 is sealed with the inner wall of the valve cover 4. The inclined design between the PTFE wedge block, the stainless steel wedge block and the valve cover fluorine lining layer can increase the contact surface between them when they are pressed tightly, so that the sealing surface is larger and the sealing force is stronger, thereby enhancing the sealing performance; the stainless steel wedge block 5 and A disc spring device is provided between the packing gland 7, and the disc spring 9 is arranged between the two butterfly plates 8. The two butterfly plates 8 are respectively in contact with the stainless steel wedge block 5 and the packing gland 7. The valve cover 4 is fixedly connected to the auxiliary valve body 13 by bolts. The packing gland 7 is pressed and sleeved on the valve stem 6 by the valve cover 4. By utilizing the automatic elastic compensation function of the disc spring, when the sealing surface is worn and a gap is generated, it can automatically compensate to ensure that the valve stem is tightly sealed; the sampling device includes a connecting plate 14, a connecting block 15, a PTFE adapter 16 and a sampling bottle 17. At least 4 long bolts are used to penetrate the connecting plate 14, the auxiliary valve body 13 and the main valve body 1 in sequence to fix the three together. A valve seat fixing ring 19 is provided between the connecting plate 14 and the auxiliary valve body 13. The valve seat fixing ring 19 is fixedly installed on the auxiliary valve The valve seat fixing ring 19 is sealed with the contact surface of the ball 10, and a through hole is provided in the middle of the connecting disk 14. The upper end of the PTFE adapter 16 is inserted into the through hole and has an interference fit with the inner wall of the through hole to achieve a sealed connection. The connecting disk 14 and the PTFE adapter 16 are fixedly connected through the connecting block 15. The upper half of the connecting block 15 is fixedly installed on the side of the connecting disk 14 by bolts to make the connection more secure. The lower half of the connecting block 15 is fixedly installed on the side of the PTFE adapter by bolts. A turning section is provided between the upper and lower halves of the connecting block 15, so that the upper half of the connecting block 15 fits with the surface of the connecting disk 14 while ensuring that the lower half of the connecting block 15 fits with the side of the PTFE adapter 16;The PTFE adapter 16 is provided with a sampling channel 18 in the middle thereof, which is connected to the sphere 10. After the sphere 10 is rotated, the sampling cavity can be connected to the sampling channel. The connecting area is determined by the rotation angle. The sampling volume can be adjusted as needed. The lower end of the PTFE adapter 16 is provided with a threaded hole matching the threaded opening of the sampling bottle 17. The sampling bottle 17 is fixedly connected to the PTFE adapter 16 by threads. The PTFE adapter 16 can be replaced according to the threaded opening requirements of the sampling bottle, and is easy to disassemble and assemble. ;
[0014] A PTFE sealing ring 23 is provided between the stainless steel wedge block 5, the valve stem 6 and the valve cover fluorine lining layer 2, which cooperates with the stainless steel wedge block 5, the valve cover fluorine lining layer 2 and the PTFE wedge block to form four seals, further enhancing the sealing performance.
[0015] like Figure 2 As shown, the side of the PTFE adapter 16 is provided with a threaded hole, and the exhaust pipe bracket 22 is fixedly connected to the PTFE adapter 16 through the threaded hole. An exhaust pipe 21 is provided in the exhaust pipe bracket 22, and the exhaust pipe 21 passes through the side of the PTFE adapter 16 and is connected to the sampling channel 18. When sampling, the gas in the sampling bottle 17 can be discharged from the exhaust pipe 21 to avoid excessive pressure in the sampling bottle 17, which leads to sampling difficulties. A sealing ring 20 is provided between the PTFE adapter 16 and the valve seat fixing ring 19 to further enhance the sealing performance and avoid medium leakage.
[0016] A sealing ring 20 is provided between the PTFE adapter 16 and the valve seat fixing ring 19 to further enhance the sealing performance and prevent medium leakage.
[0017] The spherical surface of the ball 10 is completely sealed and fitted with the inner wall of the auxiliary valve body 13, and the curvature of the inner wall of the auxiliary valve body 13 matches the curvature of the spherical surface of the ball 10, so that the sample after sampling will not remain in the inner cavity of the auxiliary valve body 13, and the sample will not be contaminated when sampling again.
[0018] The above embodiments describe the present invention in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. Any changes and improvements made within the scope of the present invention should still fall within the scope of the patent of the present invention.
Claims
1. An automatic compensating fluorine-lined sampling ball valve, comprising a main valve body (1), an auxiliary valve body (13), a valve cover (4), a ball (10), and a valve stem (6); the surfaces of the main valve body (1), the auxiliary valve body (13), the valve cover (4), the ball (10), and the valve stem (6) in contact with the medium fluid are all lined with polytetrafluoroethylene linings; the upper end of the auxiliary valve body (13) is connected to the main valve body (1); the lower end of the auxiliary valve body (13) is connected to a sampling device; a polytetrafluoroethylene valve seat (12) that cooperates with the spherical surface of the ball (10) is arranged in the inner cavity of the auxiliary valve body (13); the valve stem (6) and the ball (10) adopt an integrated structure; the ball (10) is provided with a sampling cavity (11); the fluorine-lined layer (2) of the valve cover is sealed with the valve stem (6) and the spherical surface of the ball (10); the fluorine-lined layer (2) of the valve cover, the valve stem (6) and the packing gland (7) cooperate with each other to form a sealed cavity; and the valve stem (6) and the packing gland (7) cooperate with each other to form a sealed cavity. The valve cover fluorine lining layer (2) adopts an inclined surface design, the inclined surface layer is located in the sealing cavity, and a stainless steel wedge block (5), a PTFE wedge block (3), and a disc spring device are arranged in the sealing cavity. The stainless steel wedge block (5) is sleeved on the valve stem (6) and is sealed with the valve stem (6). The lower wedge surface of the stainless steel wedge block (5) is sealed with the inclined surface of the valve cover fluorine lining layer (2). The PTFE wedge block (3) is arranged between the upper wedge surface of the stainless steel wedge block (5) and the valve cover (4) to form a The lower wedge surface of the PTFE wedge block (3) is in sealing cooperation with the upper wedge surface of the stainless steel wedge block (5), the upper surface of the PTFE wedge block (3) is in sealing cooperation with the inner wall of the valve cover (4), and the PTFE wedge block, the stainless steel wedge block and the fluorine lining layer of the valve cover are designed in an inclined plane; a disc spring device is arranged between the stainless steel wedge block (5) and the packing gland (7), and the disc spring (9) is arranged between the two butterfly plates (8), and the two butterfly plates (8) are respectively connected to the stainless steel wedge block (5) and the packing gland (7). The packing gland (7) contacts the main valve body (1), the valve cover (4) is fixedly connected to the auxiliary valve body (13) by bolts, and the packing gland (7) is pressed and sleeved on the valve stem (6) by the valve cover (4); the sampling device comprises a connecting plate (14), a connecting block (15), a PTFE adapter (16) and a sampling bottle (17); the connecting plate (14), the auxiliary valve body (13) and the main valve body (1) are fixedly connected by a plurality of penetrating bolts, and a valve is provided between the connecting plate (14) and the auxiliary valve body (13). A seat fixing ring (19) is fixedly installed in the auxiliary valve body (13), and the contact surface of the seat fixing ring (19) and the ball (10) are sealed. A through hole is provided in the middle of the connecting plate (14), and the upper end of the PTFE adapter (16) is inserted into the through hole. The connecting plate (14) and the PTFE adapter (16) are fixedly connected through a connecting block (15). A sampling channel (18) connected to the ball (10) is provided in the middle of the PTFE adapter (16), and a threaded hole matching the threaded opening of the sampling bottle (17) is provided at the lower end of the PTFE adapter (16). The sampling bottle (17) and the PTFE adapter (16) are fixedly connected through threads.
2. The automatic compensating fluorine-lined sampling ball valve according to claim 1 is characterized in that: A polytetrafluoroethylene sealing ring (23) is provided between the stainless steel wedge block (5), the valve stem (6) and the valve cover fluorine lining layer (2).
3. The automatic compensating fluorine-lined sampling ball valve according to claim 2 is characterized in that: The PTFE adapter (16) is provided with a threaded hole on the side thereof, and the exhaust pipe bracket (22) is fixedly connected to the PTFE adapter (16) via the threaded hole. An exhaust pipe (21) is provided inside the exhaust pipe bracket (22), and the exhaust pipe (21) passes through the side of the PTFE adapter (16) and is in communication with the sampling channel (18).
4. The automatic compensating fluorine-lined sampling ball valve according to claim 3 is characterized in that: A sealing ring (20) is provided between the PTFE adapter (16) and the valve seat fixing ring (19).
5. The automatic compensating fluorine-lined sampling ball valve according to claim 1, 2, 3 or 4, characterized in that: The spherical surface of the ball (10) is completely sealed and fitted with the inner cavity wall of the auxiliary valve body (13), and the curvature of the inner cavity wall of the auxiliary valve body (13) matches the curvature of the spherical surface of the ball (10), so that the sample after sampling will not remain in the inner cavity of the auxiliary valve body (13).