A new angle seat valve
By using a beveled valve seat and valve stem structure, sealing ring and locking nut for fixation, combined with PTFE and copper V-shaped gaskets, the problem of poor sealing performance of angle seat valves in high-temperature environments is solved, and the sealing performance and detection function under high temperature are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG XIBOLUN AUTOMATICALLY CONTROL SYST ENG TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-05
AI Technical Summary
Existing angle seat valves are prone to internal component deformation under high temperature environments, which affects the sealing effect.
The valve seat and stem are designed with a beveled fit, and are fixed with a sealing ring and a lock nut. They are sealed with PTFE and copper V-shaped gaskets, and reinforced with annular retaining rings and O-rings. An exhaust port is also provided for testing.
It maintains a good sealing effect in high-temperature environments, prevents gasket deformation, improves sealing performance, and provides detection functions.
Smart Images
Figure CN224326765U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, and more specifically, to a novel angle seat valve. Background Technology
[0002] Valves are control components in fluid transport systems, possessing functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, and pressure relief. Angle seat valves are widely used for frequent short-duration starts, characterized by their sensitive response and accurate action, enabling precise control of gas and liquid flow rates. They can also achieve requirements such as accurate temperature control and liquid dripping.
[0003] Existing angle seat valves require operation in high-temperature environments, which can easily cause deformation of internal components, affecting the sealing performance. Therefore, the sealing structure of angle seat valves needs to be redesigned to adapt to the sealing function under prolonged high-temperature conditions. Utility Model Content
[0004] This utility model overcomes the shortcomings of the prior art and provides a new type of angle seat valve with a reasonable structural design. Through the installation structure of the valve seat on the valve stem and the structural settings of the retaining ring washer, V-shaped lower washer, V-shaped middle washer, and V-shaped upper washer in the cylinder body, a better sealing effect can be achieved.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A novel angle seat valve includes a valve body, a cylinder body connected to the valve body, a cylinder head connected to the cylinder body, and an air source connector connected to the cylinder body. A valve stem passes through the cylinder head, the cylinder body, and the valve body. A piston is mounted on the valve stem within the cylinder head. A valve seat is mounted on the valve stem within the valve body. A downwardly inclined conical surface is provided on the valve stem corresponding to the position of the valve seat. A mating surface is provided inside the valve seat to engage with the conical surface. The valve seat is fitted onto the valve stem through the mating surface and the engagement with the conical surface. The lower end of the valve stem is the connecting end. A mounting groove is provided at the bottom of the valve seat. A sealing ring is fitted on the connecting end and is located in the mounting groove. A locking nut is provided on the connecting end to fix the sealing ring and the valve seat to the valve stem.
[0007] By adopting the above technical solution, and by setting a conical body on the valve stem and a matching mating surface in the valve seat, the valve seat can achieve a bevel fit when installed on the valve stem. Furthermore, by positioning the sealing ring in the mounting groove and fastening the sealing ring to the valve seat with a lock nut, the valve seat and valve stem are fixed. This configuration ensures that the valve seat is well fixed to the valve stem and that the sealing gasket is pressed tightly against the valve seat, preventing gaps between the sealing gasket and the valve seat. Even under prolonged high-temperature conditions, the sealing gasket is not easily deformed, thus achieving a better sealing effect.
[0008] Preferably, the sealing ring and the connecting end are also in a bevel fit, the inclination direction of the bevel is opposite to the inclination direction of the conical body, and a gasket is provided between the locking nut and the sealing ring.
[0009] By adopting the above technical solution, the sealing gasket is less likely to detach from the valve stem. The inclined surface between the sealing ring and the connecting end is in the opposite direction to the inclination of the conical body. Furthermore, the setting of the gasket and the tightening of the lock nut allow the sealing gasket to fit more tightly against the valve seat.
[0010] Preferably, an annular groove is provided on the inner wall of the lower end of the cylinder body, and an annular retaining ring is provided in the annular groove. The valve stem passes through the annular retaining ring. The valve stem is located in the cylinder body and is fitted with a retaining ring washer, a V-shaped lower washer, a V-shaped middle washer, a V-shaped upper washer, and a spring washer in the cylinder body from bottom to top. A spring is connected between the spring washer and the upper end of the cylinder body. The V-shaped lower washer and the V-shaped middle washer face opposite directions.
[0011] By adopting the above technical solution, the annular retaining ring can specifically be an annular retaining ring, which supports and clamps the retaining ring pad. When the retaining ring pad needs to be disassembled, simply remove the annular retaining ring. Multiple V-shaped lower pads can be provided. The purpose of the V-shaped lower pads is that when a high-temperature medium flows through, due to thermal expansion, the V-shaped lower pads will expand and thus more tightly grip the valve stem. The same applies to the V-shaped upper pad. Furthermore, by incorporating spring pads and springs, the V-shaped lower pad, V-shaped middle pad, and V-shaped upper pad can have a preload, thereby ensuring a tighter fit to the valve stem. The V-shaped lower pad and V-shaped upper pad are made of polytetrafluoroethylene (PTFE), while the V-shaped middle pad is made of copper.
[0012] Preferably, the V-shaped gasket has V-shaped openings on both the upper and lower sides, with the V-shaped openings on the upper and lower sides being opposite. The V-shaped gasket has annular grooves on both the inner side corresponding to the valve stem and the outer side corresponding to the cylinder body, and O-rings are provided in both annular grooves.
[0013] By adopting the above technical solution, the V-shaped opening is designed to accommodate and position the upper and lower V-shaped gaskets. The inner and outer annular grooves are filled with O-rings, which improves the sealing performance between the valve stem and the cylinder body.
[0014] Preferably, the cylinder block has an exhaust port that communicates with the interior of the cylinder block.
[0015] By adopting the above technical solution, the exhaust port can discharge the gas generated by the valve stem when it moves in the cylinder and valve body. The exhaust port can also be used as a test port. When the medium flows out of the exhaust port, it indicates that there is a problem with the sealing inside the valve body, and maintenance is required.
[0016] Preferably, the cylinder body is inserted into the valve body and there is a gap between them. An annular stop block is fixed or integrally provided on the outer bottom of the cylinder body. An annular sealing ring is provided below the annular stop block. A step supporting the annular sealing ring is formed inside the valve body at the position corresponding to the annular sealing ring. A union nut is sleeved on the cylinder body. The union nut has an insertion part that is inserted into the gap. The outer periphery of the insertion part is threadedly connected to the inner wall of the valve body.
[0017] By adopting the above technical solution, the position of the cylinder body relative to the valve body can be changed. Since the orientation of the air source connector should be convenient for connection during actual production, the union nut is loosened during adjustment. At this time, the cylinder body can rotate relative to the valve body to adjust the position of the air source connector. After adjustment, the union nut is screwed onto the valve body and the annular stop is pressed against the annular sealing ring to fix the cylinder body.
[0018] The beneficial effects of this utility model are:
[0019] This utility model has a reasonable structural design. Through the installation structure of the valve seat on the valve stem and the structural settings of the retaining ring washer, V-shaped lower washer, V-shaped middle washer, and V-shaped upper washer in the cylinder body, a better sealing effect can be achieved. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;
[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0022] Figure 3 for Figure 1 Enlarged view of point B in the middle;
[0023] Figure 4 This is a schematic diagram illustrating the exploded structure of the valve seat and valve stem according to a specific embodiment of this utility model;
[0024] Figure 5 This is a schematic diagram illustrating the structure of the exhaust port in a specific embodiment of this utility model.
[0025] In the diagram: 1. Valve body; 2. Cylinder body; 21. Annular groove; 22. Annular retaining ring; 23. Snap ring washer; 24. V-shaped lower washer; 25. V-shaped middle washer; 251. V-shaped opening; 252. Annular groove; 253. O-ring; 26. V-shaped upper washer; 27. Spring washer; 28. Spring; 29. Exhaust port; 3. Cylinder head; 4. Air source connector; 5. Valve stem; 51. Conical body; 52. Connecting end; 6. Piston; 7. Valve seat; 71. Mating surface; 72. Mounting groove; 73. Sealing ring; 74. Locking nut; 75. Washer; 8. Clearance; 81. Annular stop block; 82. Annular sealing ring; 83. Step; 84. Union nut; 85. Insertion part. Detailed Implementation
[0026] 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.
[0027] like Figure 1-5 As shown, a novel angle seat valve includes a valve body 1, a cylinder body 2 connected to the valve body 1, a cylinder head 3 connected to the cylinder body 2, and an air source connector 4 connected to the cylinder body 2. A valve stem 5 is inserted through the cylinder head 3, the cylinder body 2, and the valve body 1. A piston 6 is installed on the valve stem 5 within the cylinder head 3, and a valve seat 7 is installed on the valve stem 5 within the valve body 1. A downwardly inclined conical surface 51 is provided on the valve stem 5 corresponding to the position of the valve seat 7. A mating surface 71 is provided inside the valve seat 7 to mate with the conical surface 51. The valve seat 7 is fitted onto the valve stem 5 through the mating surface 71 and the conical surface 51. The lower end of the valve stem 5 is a connecting end 52 located at the bottom of the conical surface 51. An installation groove 72 is provided at the bottom of the valve seat 7. A sealing ring 73 is fitted on the connecting end 52 and is located in the installation groove 72. A locking nut 74 is provided on the connecting end 52 to fix the sealing ring 73 and the valve seat 7 to the valve stem 5.
[0028] This configuration, with a conical surface 51 on the valve stem 5 and a matching mating surface 71 in the valve seat 7, allows the valve seat 7 to achieve a beveled fit when installed on the valve stem 5. Furthermore, by positioning the sealing ring 73 in the mounting groove 72 and securing it to the valve seat 7 with a locking nut 74, the valve seat 7 and valve stem 5 are fixed together. This configuration ensures the valve seat 7 is securely fixed to the valve stem 5 and allows the sealing gasket to be pressed tightly against the valve seat 7, preventing any gap 8 between the sealing gasket and the valve seat 7. Even under prolonged high-temperature conditions, the sealing gasket is not easily deformed, thus achieving a better sealing effect.
[0029] Preferably, an annular groove 21 is provided on the lower inner wall of the cylinder body 2, and an annular retaining ring 22 is provided in the annular groove 21. The valve stem 5 passes through the annular retaining ring 22. The valve stem 5 is located in the cylinder body 2 and is fitted with, from bottom to top, a retaining ring washer 23 abutting against the annular retaining ring 22, a V-shaped lower washer 24 abutting against the retaining ring washer 23, a V-shaped middle washer 25 abutting against the V-shaped lower washer 24, a V-shaped upper washer 26 abutting against the V-shaped middle washer 25, and a spring washer 27 abutting against the V-shaped upper washer 26. A spring 28 is connected between the spring washer 27 and the upper end of the cylinder body 2. The V-shaped lower washer 24 and the V-shaped lower washer 25 face opposite directions. The annular retaining ring 22 can be an annular retaining ring, which supports and clamps the retaining ring washer 23. When it is necessary to disassemble the retaining ring washer 23, only the annular retaining ring needs to be removed. Multiple V-shaped lower gaskets 24 can be provided. The purpose of the V-shaped lower gaskets 24 is that when a high-temperature medium flows through, due to thermal expansion, the V-shaped lower gaskets 24 will expand and thus more tightly grip the valve stem 5. The same applies to the V-shaped upper gasket 26. Furthermore, by providing spring gaskets 27 and springs 28, the V-shaped lower gaskets 24, V-shaped middle gaskets 25, and V-shaped upper gaskets 26 can have a preload, thereby ensuring a tighter fit to the valve stem 5. The V-shaped lower gaskets 24 and V-shaped upper gaskets 26 are made of polytetrafluoroethylene (PTFE), while the V-shaped middle gasket 25 is made of copper.
[0030] Furthermore, V-shaped openings 251 are provided on both the upper and lower sides of the V-shaped gasket 25, with the upper and lower V-shaped openings 251 being opposite in orientation. Annular grooves 252 are provided on both the inner side corresponding to the valve stem 5 and the outer side corresponding to the cylinder body 2, and O-rings 253 are provided within both annular grooves 252. This configuration allows for the placement and positioning of the upper V-shaped gasket 26 and the lower V-shaped gasket 24. The inner and outer annular grooves 252, filled with O-rings 253, improve the sealing performance between the valve stem 5 and the cylinder body 2.
[0031] An exhaust port 29 is provided on the cylinder body 2, which communicates with the interior of the cylinder body 2. The exhaust port 29 is provided to discharge the gas generated by the valve stem 5 when it moves in the cylinder body 2 and the valve body 1. The exhaust port 29 can also be used as a test port. When the medium flows out from the exhaust port 29, it indicates that there is a problem with the sealing inside the valve body 1, and maintenance is required.
[0032] The cylinder body 2 is inserted into the valve body 1, with a gap 8 between them. An annular stop block 81 is fixed or integrally formed on the outer bottom of the cylinder body 2. An annular sealing ring 82 is located below the annular stop block 81. A step 83 supporting the annular sealing ring 82 is formed inside the valve body 1 at the position corresponding to the annular sealing ring 82. A union nut 84 is fitted onto the cylinder body 2. The union nut 84 has an insertion part 85 that inserts into the gap 8. The outer periphery of the insertion part 85 is threadedly connected to the inner wall of the valve body 1. This configuration allows for changing the position of the cylinder body 2 relative to the valve body 1. Since the orientation of the air source connector 4 should facilitate connection during actual production, the union nut 84 is loosened during adjustment. The cylinder body 2 can then rotate relative to the valve body 1 to adjust the position of the air source connector 4. After adjustment, the union nut 84 is screwed onto the valve body 1, and the annular stop block 81 is pressed against the annular sealing ring 82 to fix the cylinder body 2.
[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A novel angle seat valve, comprising a valve body (1), a cylinder body (2) connected to the valve body (1), a cylinder head (3) connected to the cylinder body (2), and an air source connector (4) connected to the cylinder body (2), wherein a valve stem (5) is provided through the cylinder head (3), the cylinder body (2), and the valve body (1), a piston (6) is provided on the valve stem (5) in the cylinder head (3), and a valve seat (7) is provided on the valve stem (5) in the valve body (1), characterized in that, The valve stem (5) is provided with a downwardly inclined conical body (51) at the position corresponding to the valve seat (7). The valve seat (7) is provided with a mating surface (71) for the conical body (51). The valve seat (7) is fitted onto the valve stem (5) through the mating surface (71) and the conical body (51). The valve stem (5) is located at the lower end of the conical body (51) as the connecting end (52). The bottom of the valve seat (7) is provided with an installation groove (72). A sealing ring (73) is fitted on the connecting end (52). The sealing ring (73) is located in the installation groove (72). A locking nut (74) is provided on the connecting end (52) to fix the sealing ring (73) and the valve seat (7) to the valve stem (5).
2. The novel angle seat valve according to claim 1, characterized in that, The sealing ring (73) and the connecting end (52) are also in a bevel fit. The inclination direction of the bevel is opposite to that of the conical body (51). A gasket (75) is provided between the locking nut (74) and the sealing ring (73).
3. A novel angle seat valve according to claim 2, characterized in that, An annular groove (21) is provided on the inner wall of the lower end of the cylinder body (2). An annular retaining ring (22) is provided in the annular groove (21). The valve stem (5) passes through the annular retaining ring (22). The valve stem (5) is located in the cylinder body (2) and is provided with a retaining ring washer (23) abutting against the annular retaining ring (22), a V-shaped lower washer (24) abutting against the retaining ring (23), a V-shaped middle washer (25) abutting against the V-shaped lower washer (24), a V-shaped upper washer (26) abutting against the V-shaped middle washer (25), and a spring washer (27) abutting against the V-shaped upper washer (26). A spring (28) is connected between the spring washer (27) and the upper end of the cylinder body (2). The V-shaped lower washer (24) and the V-shaped lower washer (24) are oriented in opposite directions.
4. A novel angle seat valve according to claim 3, characterized in that, The V-shaped pad (25) has V-shaped openings (251) on both the top and bottom sides, and the V-shaped openings (251) on the top and bottom sides are opposite.
5. A novel angle seat valve according to claim 4, characterized in that, The V-shaped gasket (25) has an annular groove (252) on the inner side of the valve stem (5) and on the outer side of the cylinder body (2), and an O-ring (253) is provided in both annular grooves (252).
6. A novel angle seat valve according to claim 3, 4, or 5, characterized in that, The cylinder block (2) has an exhaust port (29) that communicates with the interior of the cylinder block (2).
7. A novel angle seat valve according to claim 6, characterized in that, The cylinder body (2) is inserted into the valve body (1) and there is a gap (8) between the cylinder body (1) and the valve body (1). An annular stop block (81) is fixed or integrally provided on the outer bottom of the cylinder body (2). An annular sealing ring (82) is provided below the annular stop block (81). A step (83) supporting the annular sealing ring (82) is formed inside the valve body (1) at the position corresponding to the annular sealing ring (82). A union nut (84) is sleeved on the cylinder body (2). The union nut (84) has an insertion part (85) inserted into the gap (8). The outer periphery of the insertion part (85) is threadedly connected to the inner wall of the valve body (1) corresponding to the insertion part (85).