CN219692293U - Oil-free lubrication pressure reducing valve - Google Patents
Oil-free lubrication pressure reducing valve Download PDFInfo
- Publication number
- CN219692293U CN219692293U CN202320086051.5U CN202320086051U CN219692293U CN 219692293 U CN219692293 U CN 219692293U CN 202320086051 U CN202320086051 U CN 202320086051U CN 219692293 U CN219692293 U CN 219692293U
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- valve
- diaphragm
- valve core
- valve body
- sealing
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- 238000005461 lubrication Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 88
- 230000000694 effects Effects 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000008358 core component Substances 0.000 claims description 4
- 239000004519 grease Substances 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses an oil-free lubrication pressure reducing valve which comprises an adjusting handle, an adjusting screw assembly, a diaphragm assembly, a main valve body and a valve core assembly, wherein the main valve body is provided with an air inlet end and an air outlet end, a valve port is formed in the main valve body, the valve core assembly is arranged in the main valve body, the adjusting handle is sleeved outside the main valve body, the upper end of the adjusting screw assembly is in transmission connection with the adjusting handle, a constant value spring is propped between the adjusting screw assembly and the diaphragm assembly, a valve seat is arranged at the lower end of the main valve body, a balance spring is propped between the valve core assembly and the valve seat, the outer wall of the valve core is provided with a smooth surface, the valve seat is provided with a star-shaped sealing ring which is in sealing fit with the outer wall of the valve core, a first annular sealing area and a second annular sealing area are formed by the star-shaped sealing ring and the outer wall of the valve core along the axial direction, so that abrasion of the valve core to the sealing surface can be effectively reduced, the sealing performance of parts can be increased, and the sealing effect and the service life of the outer shaft surface of the valve core and the sealing element can be ensured under the condition that grease is not smeared.
Description
Technical Field
The utility model relates to the technical field of air source treatment elements, in particular to a pressure reducing valve with oil-free lubrication.
Background
The sealing structure inside the conventional pneumatic product is provided with grease, so that the sealing effect and the service life of a sealing element are ensured, for example, a relief valve with sensitive overflow is disclosed in China patent publication No. (CN 207229786U), the relief valve comprises a main valve body, an upper cover, a bottom cover, a diaphragm assembly, a valve rod, an adjusting screw assembly and an adjusting handle, a valve core is movably arranged in the main valve body, a valve core spring is propped between the valve core and the bottom cover, the diaphragm assembly comprises a diaphragm seat and a diaphragm fixedly connected with the diaphragm seat, the outer periphery of the diaphragm is tightly pressed between the main valve body and the upper cover, the main valve body, the diaphragm seat and the diaphragm are matched to form a valve cavity, the diaphragm seat is provided with an overflow hole, the lower end of the diaphragm seat is provided with a conical flaring coaxially arranged with the overflow hole, the upper end of the valve rod is provided with a boss coaxially arranged with the conical flaring, the upper end of the boss is provided with a first conical surface matched with the conical flaring, the outer sleeve of the boss is provided with a sealing sleeve, and the upper end of the sealing sleeve is provided with a second conical surface matched with the first conical surface.
However, there are drawbacks in that the surface of the product (such as silicon wafer color conversion, circuit board contamination, etc.) is polluted if oil is contained in the compressed air during the manufacturing process of electronic, semiconductor and photovoltaic devices, so that in these manufacturing occasions, the pressure reducing valve product is required to use the oil-free lubrication technology, and in general, the sealing ring position at the valve seat is smeared with grease, so that the sealing effect and the service life of the outer axial surface of the valve core and the sealing member are ensured. However, after ventilation, the rapid flow of air can carry some grease in through the air outlet end, with a great risk of fouling and damage to subsequent processed products.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings of the prior art, and provides an oil-free lubrication pressure reducing valve which is simple and reasonable in structure, can ensure the sealing effect and the service life of an outer shaft surface of a valve core and a sealing piece under the condition of not smearing grease, and reduces the abrasion of the valve core to a sealing surface.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model discloses an oil-free lubrication pressure reducing valve, which comprises an adjusting handle, an adjusting screw rod assembly, a diaphragm assembly, a main valve body and a valve core assembly, wherein the main valve body is respectively provided with an air inlet end and an air outlet end, a valve port used for communicating the air inlet end with the air outlet end is formed in the main valve body, a valve core assembly which is in sealing fit with the valve port is movably arranged in the main valve body, the adjusting handle is sleeved outside the main valve body, the upper end of the adjusting screw rod assembly extends out of the main valve body and is in transmission connection with the adjusting handle, a constant value spring is propped between the adjusting screw rod assembly and the diaphragm assembly, the lower end of the main valve body is provided with a valve seat, a balance spring is propped between the valve core assembly and the valve seat, the outer wall of the valve core is provided with a smooth surface, and the valve seat is provided with a star-shaped sealing ring which is in sealing fit with the outer wall of the valve core, and a first annular sealing area and a second annular sealing area are formed by the star-shaped sealing ring and the outer wall of the valve core along the axial direction.
Further, the diaphragm assembly comprises a diaphragm seat and a diaphragm, the diaphragm seat is fixedly connected with a diaphragm, the main valve body, the diaphragm and the diaphragm seat are matched to form a diaphragm cavity, and the diaphragm seat is provided with an overflow hole communicated with the diaphragm cavity.
Further, the fixed value spring is propped between the adjusting screw assembly and the diaphragm seat.
Further, a cone flaring which is coaxial with the overflow hole is arranged at the lower end of the diaphragm seat, and a boss which is coaxial with the cone flaring is formed at the upper end of the valve core component.
Further, the main valve body is provided with a small conduit hole for communicating the diaphragm cavity with the air outlet end, and a gas channel is formed among the air inlet end, the air outlet end, the small conduit hole and the diaphragm cavity.
Further, the adjusting screw assembly comprises an adjusting screw and an adjusting nut, the upper end of the adjusting screw is fixedly connected with the adjusting handle, and the adjusting nut is in threaded connection with the adjusting screw.
Further, the valve core assembly comprises a valve rod and a valve core, the valve rod is propped between the diaphragm assembly and the valve core, and the lower end of the valve rod is fixedly connected with the valve core.
Further, the valve rod is abutted between the diaphragm seat and the valve core.
Further, a valve core sealing gasket matched with the valve port in a sealing way is embedded at the upper end of the valve core.
Further, a valve rod sealing ring is arranged between the valve rod and the main valve body.
The beneficial effects of the utility model are as follows: compared with the prior art, the sealing element of the oil-free lubrication pressure reducing valve is improved, the O-shaped sealing ring of the single-ring sealing surface is changed into the two star-shaped sealing rings of the sealing surfaces, the star-shaped sealing ring and the outer wall of the valve element are axially matched to form the first annular sealing area and the second annular sealing area, the sealing effect can be effectively achieved, and the contact area of the star-shaped sealing ring of the two sealing surfaces and the outer wall of the valve element is smaller than the contact area of the O-shaped sealing ring and the outer wall of the valve element, so that the contact area is reduced, the outer wall of the valve element is provided with the smooth surface, the abrasion of the valve element to the sealing surfaces can be effectively reduced, the sealing performance of parts is improved, and the sealing effect and the service life of the outer axial surface of the valve element and the sealing element can be ensured under the condition of not smearing grease.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
In fig. 1-2: 1. a main valve body; 2. an adjusting handle; 3. an adjusting nut; 4. adjusting a screw; 5. a constant value spring; 7. an overflow aperture; 8. a diaphragm cavity; 9. a catheter aperture; 10. a valve stem; 11. an air outlet end; 12. an air inlet end; 13. a valve core; 14. a valve stem seal ring; 15. a balance spring; 16. a valve seat; 17. a valve port; 18. a valve core sealing gasket; 19. a star-shaped sealing ring; 20. a membrane; 21. a boss; 22. and a diaphragm seat.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
The oil-free pressure reducing valve as described in fig. 1-2 comprises an adjusting handle 2, an adjusting screw rod assembly, a diaphragm assembly, a main valve body 1 and a valve core assembly, wherein the main valve body 1 is respectively provided with an air inlet end 12 and an air outlet end 11, a valve port 17 used for communicating the air inlet end 12 with the air outlet end 11 is formed in the main valve body 1, a valve core assembly in sealing fit with the valve port 17 is movably arranged in the main valve body 1, the adjusting handle 2 is sleeved outside the main valve body 1, the upper end of the adjusting screw rod assembly extends out of the main valve body 1 and is in transmission connection with the adjusting handle 2, a constant value spring 5 is propped between the adjusting screw rod assembly and the diaphragm assembly, a valve seat 16 is arranged at the lower end of the main valve body 1, a balance spring 15 is propped between the valve core assembly and the valve seat 16, the outer wall of the valve core 13 is provided with a smooth surface, a star-shaped sealing ring 19 in sealing fit with the outer wall of the valve core 13 is axially matched with a first annular sealing area and a second annular sealing area.
In general, grease is smeared on the sealing ring position at the valve seat 16, so that the sealing effect and the service life of the outer axial surface of the valve core 13 and the sealing ring can be ensured. However, after aeration, the rapid flow of air will carry some of the grease in through the outlet end 11, with a significant risk of fouling and damage to the subsequent processed product. In particular, when the product is mainly used in the technical fields of electronics, semiconductor manufacturing, photovoltaic equipment manufacturing and the like, if grease is carried in compressed air, the surface of the product (such as silicon wafer color conversion, circuit board pollution and the like) can be polluted, in order to avoid the occurrence of the situation, compared with the prior art, the utility model changes the O-shaped sealing ring of a single-ring sealing surface into the star-shaped sealing ring 19 of two sealing surfaces by improving the sealing element of the pressure reducing valve, the star-shaped sealing ring 19 and the outer wall of the valve core 13 are axially matched to form a first annular sealing area and a second annular sealing area, the sealing effect can be effectively achieved, and the contact area of the star-shaped sealing ring 19 and the outer wall of the valve core 13 is smaller than the contact area of the O-shaped sealing ring and the outer wall of the valve core 13, so that the contact area is reduced, the abrasion of the valve core 13 to the sealing surface can be effectively reduced, the sealing performance of parts is increased, and the good sealing effect can be achieved under the condition of not being smeared with grease.
Preferably, in this embodiment, the diaphragm assembly includes a diaphragm seat 22 and a diaphragm 20, the diaphragm seat 22 is fixedly connected with the diaphragm 20, the main valve body 1, the diaphragm 20 and the diaphragm seat 22 are cooperatively formed with a diaphragm cavity 8, and the diaphragm seat 22 is provided with an overflow hole 7 communicating with the diaphragm cavity 8; preferably, in this embodiment, a cone-shaped flaring coaxially arranged with the overflow hole 7 is arranged at the lower end of the diaphragm seat 22, and a boss 21 coaxially arranged with the cone-shaped flaring is formed at the upper end of the valve core assembly;
preferably, in this embodiment, the valve core assembly includes a valve rod 10 and a valve core 13, where the valve rod 10 is abutted between the diaphragm assembly and the valve core 13, and specifically, the valve rod 10 is abutted between the diaphragm seat 22 and the valve core 13. The lower end of the valve rod 10 is fixedly connected with the valve core 13; the valve rod 10 is installed more firmly, and the stability and reliability of the pressure reducing valve are further improved. Specifically, the upper end of the valve rod 10 is formed with a boss 21 coaxially arranged with the conical flaring; specifically, the boss 21 is sleeved with a sealing sleeve, so that the sealing effect is effectively achieved.
Specifically, a spool chamber is formed between the spool 13 and the balance spring 15. Preferably, in this embodiment, the upper end of the valve core 13 is embedded with a valve core sealing pad 18 that is in sealing fit with the valve port 17, so as to improve the sealing effect between the valve core 13 and the valve port 17.
Preferably, in this embodiment, a valve stem sealing ring 14 is disposed between the valve stem 10 and the main valve body 1. So that the compressed gas in the main valve body 1 cannot directly flow into the diaphragm cavity 8 from the clearance between the valve rod 10 and the main valve body 1, and the pressure regulation accuracy is ensured.
Because the sealing sleeve is sleeved outside the boss 21, the upper end of the boss 21 is exposed, when the valve rod 10 is in contact with the diaphragm seat 22, the boss 21 is directly contacted with the conical flaring through the conical surface at first, and then the sealing sleeve is contacted with the conical flaring to realize the sealing of the overflow hole 7, so that overflow is more sufficient; when the valve rod 10 is separated from the diaphragm seat 22, the sealing sleeve is separated from the conical flaring firstly, and the blocking of the overflow hole 7 is removed, so that the overflow can be realized rapidly, the sensitivity is higher, and the stability and the reliability of the working performance of the pressure reducing valve are improved.
Specifically, the constant value spring 5 is abutted between the adjusting screw assembly and the diaphragm seat 22; preferably, in this embodiment, a cone-shaped flaring coaxially arranged with the overflow hole 7 is arranged at the lower end of the diaphragm seat 22, and a boss 21 coaxially arranged with the cone-shaped flaring is formed at the upper end of the valve rod 10; preferably, in this embodiment, the main valve body 1 is provided with a small duct hole 9 for communicating the diaphragm chamber 8 with the air outlet end 11, and a gas channel is formed between the air inlet end 12, the air outlet end 11, the small duct hole 9 and the diaphragm chamber 8.
Preferably, in this embodiment, the adjusting screw assembly includes an adjusting screw 4 and an adjusting nut 3, the upper end of the adjusting screw 4 is fixedly connected with the adjusting handle 2, and the adjusting nut 3 is in threaded connection with the adjusting screw 4.
When the adjusting handle 2 is rotated, the adjusting screw 4 synchronously rotates along with the adjusting handle 2, so that the adjusting nut 3 moves along the axial direction of the upper cover, the pretightening force of the constant value spring 5 is effectively changed, and the pressure adjusting effect is achieved. The outer wall of the adjusting nut 3 is in rotation-proof fit with the inner wall of the main valve body 1.
Specifically, the adjusting screw component is rotated by the adjusting handle 2, the adjusting nut 3 is pushed downwards under the rotation of the threads, the constant value spring 5 is pressed downwards, meanwhile, the pressure is generated, the valve core component moves downwards under the action of the spring force, the valve port 17 is opened, meanwhile, compressed air rapidly enters the air chamber of the diaphragm cavity 8, the air chamber of the valve core cavity and the air outlet end 11 through the valve port 17, after the air pressure of the air outlet end 11 is saturated (reaches the set pressure), the air pressure in the air chamber of the diaphragm cavity 8 can generate an upward thrust at the bottom of the diaphragm 20 and is balanced with the force generated by the constant value spring 5, the diaphragm 20 is finally pushed upwards, the valve core component moves upwards under the action of the constant value spring 5, the air chamber of the valve core cavity and the like, the valve port 17 is closed, and the one-time air supply flow is finished. When the air outlet end 11 descends to a certain extent, the air supply action is started once again, and the circulation is repeated.
The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.
Claims (10)
1. The utility model provides an oilless lubrication's relief pressure valve, includes adjustment handle (2), adjusting screw subassembly, diaphragm subassembly, main valve body (1) and case subassembly, main valve body (1) are equipped with inlet end (12) and end (11) of giving vent to anger respectively, be formed with in main valve body (1) and be used for intercommunication inlet end (12) and valve port (17) of end (11) of giving vent to anger, main valve body (1) internal activity be provided with valve port (17) sealing fit's case subassembly, the outside of main valve body (1) is located to adjustment handle (2) cover, the upper end of adjusting screw subassembly stretches out in main valve body (1) and is connected with adjustment handle (2) transmission, the adjusting screw subassembly with support between the diaphragm subassembly and be equipped with constant value spring (5), its characterized in that: the valve is characterized in that a valve seat (16) is arranged at the lower end of the main valve body (1), a balance spring (15) is propped between the valve core assembly and the valve seat (16), the outer wall of the valve core (13) is arranged to be a smooth surface, a star-shaped sealing ring (19) in sealing fit with the outer wall of the valve core (13) is arranged on the valve seat (16), and a first annular sealing area and a second annular sealing area are formed by axially matching the star-shaped sealing ring (19) with the outer wall of the valve core (13).
2. An oil-free pressure reducing valve as defined in claim 1, wherein: the diaphragm assembly comprises a diaphragm seat (22) and a diaphragm (20), the diaphragm seat (22) is fixedly connected with the diaphragm (20), a diaphragm cavity (8) is formed by matching the main valve body (1) with the diaphragm (20) and the diaphragm seat (22), and the diaphragm seat (22) is provided with an overflow hole (7) communicated with the diaphragm cavity (8).
3. An oil-free pressure reducing valve as defined in claim 2, wherein: the fixed value spring (5) is propped between the adjusting screw assembly and the diaphragm seat (22).
4. An oil-free pressure reducing valve as defined in claim 2, wherein: the lower end of the diaphragm seat (22) is provided with a conical flaring which is coaxially arranged with the overflow hole (7), and the upper end of the valve core component is provided with a boss (21) which is coaxially arranged with the conical flaring.
5. An oil-free pressure reducing valve as defined in claim 2, wherein: the main valve body (1) is provided with a small duct hole (9) for communicating the diaphragm cavity (8) with the air outlet end (11), and an air channel is formed among the air inlet end (12), the air outlet end (11), the small duct hole (9) and the diaphragm cavity (8).
6. An oil-free pressure reducing valve as defined in claim 1, wherein: the adjusting screw assembly comprises an adjusting screw (4) and an adjusting nut (3), wherein the upper end of the adjusting screw (4) is fixedly connected with the adjusting handle (2), and the adjusting nut (3) is in threaded connection with the adjusting screw (4).
7. An oil-free pressure reducing valve as defined in claim 1, wherein: the valve core assembly comprises a valve rod (10) and a valve core (13), the valve rod (10) is propped between the diaphragm assembly and the valve core (13), and the lower end of the valve rod (10) is fixedly connected with the valve core (13).
8. An oil-free pressure reducing valve as defined in claim 7, wherein: the valve rod (10) is abutted between the diaphragm seat (22) and the valve core (13).
9. An oil-free pressure reducing valve as defined in claim 7, wherein: the upper end of the valve core (13) is embedded with a valve core sealing gasket (18) which is in sealing fit with the valve port (17).
10. An oil-free pressure reducing valve as defined in claim 7, wherein: a valve rod sealing ring (14) is arranged between the valve rod (10) and the main valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320086051.5U CN219692293U (en) | 2023-01-30 | 2023-01-30 | Oil-free lubrication pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320086051.5U CN219692293U (en) | 2023-01-30 | 2023-01-30 | Oil-free lubrication pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219692293U true CN219692293U (en) | 2023-09-15 |
Family
ID=87944425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320086051.5U Active CN219692293U (en) | 2023-01-30 | 2023-01-30 | Oil-free lubrication pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219692293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287541A (en) * | 2023-11-24 | 2023-12-26 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
-
2023
- 2023-01-30 CN CN202320086051.5U patent/CN219692293U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287541A (en) * | 2023-11-24 | 2023-12-26 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
| CN117287541B (en) * | 2023-11-24 | 2024-02-13 | 科讯工业制造(深圳)有限公司 | Adjustable pressure stabilizing valve, assembling method thereof and semiconductor manufacturing equipment |
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