CN214743600U - High-performance pilot spring film type pressure reducing valve - Google Patents
High-performance pilot spring film type pressure reducing valve Download PDFInfo
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- CN214743600U CN214743600U CN202121017282.8U CN202121017282U CN214743600U CN 214743600 U CN214743600 U CN 214743600U CN 202121017282 U CN202121017282 U CN 202121017282U CN 214743600 U CN214743600 U CN 214743600U
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Abstract
The utility model relates to a high performance guide's spring film formula relief pressure valve, including mending main spare parts such as core joint, pressure spring, filter screen, guide's relief pressure valve and main relief pressure valve. A filter screen is arranged at a medium inlet of the valve body, a compression spring and a core supplementing joint are sequentially arranged outwards, a main reducing valve is arranged at the center of the valve body, and a pilot reducing valve is arranged at the side part of the valve body; the main characteristic is that in the closed cavity formed by valve cover and valve body, the controlled medium enters into the pilot reducing valve from the valve body pilot hole, after reducing pressure, the medium enters into the main diaphragm upper cavity of the main reducing valve from the valve body control hole, the main valve rod is opened, the medium flows to the outlet, the pressure is fed back to the pilot reducing valve from the valve body feedback hole, the stress in the pilot reducing valve and the main reducing valve is quickly balanced again, and the medium is stably reduced to the set pressure. The pilot pressure reducing valve and the main pressure reducing valve are organically combined, the structure is compact, the characteristics of quick response and sensitive adjustment of the pilot pressure reducing valve and the spring diaphragm type pressure reducing valve are fully exerted, the pressure regulation is stable, and the pilot pressure reducing valve and the spring diaphragm type pressure reducing valve have the remarkable advantages of durability and wide application range.
Description
Technical Field
The utility model belongs to the technical field of the valve, concretely relates to antidetonation is dirty resistant, compact structure, pressure regulating are stable, a large-traffic high performance guide spring film formula relief pressure valve.
Background
The regulating valve is a throttling element with changeable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of regulating the pressure. The existing regulating valve generally has the following problems:
1. when the process requires that the pressure of medium input is higher, the pressure regulating spring is generally selected to have high rigidity, and the output pressure fluctuation is larger when the flow pressure changes. In order to reduce pressure fluctuation, the drift diameter of the valve is reduced, the rigidity of the spring is reduced, but the flow limitation is serious.
2. When the process requires that the medium output flow is large, the valve structure is large in size and occupies too much installation space.
3. When the pressure fluctuation of the upstream of the medium is large, firstly, the movable part vibrates seriously, the valve rod and the sealing surface are easy to wear, and the service life of the valve is short; secondly, the outlet pressure fluctuation is large and the pressure regulation is unstable.
4. The valve has no safety protection, and movable parts such as a valve core and the like are easily blocked by impurities to damage the valve and even equipment.
The equipment such as a flame cleaner, a cutting machine, a casting blank corner cleaner and the like in the metallurgical industry requires the regulating valve to have small and compact structure so as to meet the installation requirement, and has the advantages of wide application pressure regulating range, large flow, large pressure drop, stable pressure regulation, dirt resistance, shock resistance and long service life. Therefore, it is very important to develop a high-performance pilot spring film type pressure reducing valve with shock resistance, dirt resistance, compact structure, stable pressure regulation and large flow.
Disclosure of Invention
The utility model aims to provide a high performance guide spring film formula relief pressure valve that antidetonation is dirty resistant, compact structure, pressure regulating are stable, large-traffic.
The utility model provides a high-performance guide spring film type pressure reducing valve, which comprises a valve body 1, a bushing joint 2, a compression spring 3, a filter screen 4, a guide pressure reducing valve and a main pressure reducing valve; the pilot reducing valve is positioned on one side of the valve body 1, and the main reducing valve is positioned in the center of the valve body 1; a filter screen 4 is arranged at a medium inlet of the valve body 1, a compression spring 3 is arranged above the filter screen 4, and the medium inlet of the valve body 1 is connected with a bushing joint 2; the main pressure reducing valve and the pilot pressure reducing valve are communicated through a pilot hole 39, a control hole 36 and a feedback hole 38 of the valve body 1, and the control hole 36 on the valve body 1 is communicated with the main valve cover 11 through a control conduit 35; the fabrication hole of the pilot hole 39 of the valve body 1 is provided with a plug 40 to prevent the upper and lower cavities from being communicated, and the outer end of the fabrication hole is provided with a pressure gauge 41 to detect the output pressure;
the main pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a main nozzle 5, a main valve rod 6, a main pressure regulating spring 7, a main end cover 9, a first O-shaped ring 10, a main valve cover 11, a main diaphragm assembly, a limiting plate 17 and a second O-shaped ring 18, wherein the main nozzle 5 extends into one end of the valve body 1, the valve body 1 and the main end cover 9 are connected through the first O-shaped ring 10, and the main pressure regulating spring 7 is arranged on a concave platform of the main end cover 9; a main valve rod 6 is arranged between the main pressure regulating spring 7 and the main nozzle 5; a second O-shaped ring 18 is arranged between the limiting plate 17 and the valve body 1, a main diaphragm assembly is arranged above the limiting plate 17, the main diaphragm assembly consists of a first diaphragm pressing plate 13, a second diaphragm pressing plate 15 and a main diaphragm 16, the first diaphragm pressing plate 13 and the second diaphragm pressing plate 15 are arranged on the left side and the right side of the main diaphragm 16, and the first diaphragm pressing plate 13, the second diaphragm pressing plate 15 and the main diaphragm 16 are fixed through a main locking nut 14; the edge of the main diaphragm assembly is attached to the main valve cover 11, and the main valve cover 11 and the valve body 1 are fixed through the hexagon bolts, so that good sealing performance of the valve is guaranteed;
the pilot pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a pilot end cover 19, a third O-shaped ring 20, a valve core 23, a pilot nozzle 24, a pilot valve rod 25, a pilot pressure regulating spring 29, a T-shaped hand wheel 30, a pilot pressure bearing spring 31, a pilot valve cover 33 and a pilot diaphragm assembly, the pilot diaphragm assembly consists of a locking bolt 26, a pilot diaphragm 27 and a pilot locking nut 28, and the third O-shaped ring 20 is arranged at the thread tool withdrawal grooves of the valve body 1 and the pilot end cover 19 to ensure the sealing property of the pilot pressure reducing valve; a pilot pressure-bearing spring 31 is arranged in a central concave platform of the pilot end cover 19, one end of the valve core 23 is inserted into the pilot pressure-bearing spring 31, the other end of the valve core is sleeved on the pilot valve rod 25, and the end part of the valve core 23 is connected with the pilot nozzle 24; the pilot valve rod 25 penetrates through the valve body 1 and abuts against the pilot diaphragm assembly, a flat gasket 34 is arranged between the pilot diaphragm assembly and the pilot valve cover 33, the pilot valve cover 33 is in threaded connection with the valve body 1, a pilot pressure regulating spring 29 is arranged below the pilot diaphragm assembly, a spring cover plate 32 is arranged at the joint of the pilot pressure regulating spring 29 and the pilot valve cover 33, and one end of the T-shaped hand wheel 30 abuts against the spring cover plate 32.
The utility model discloses in, be provided with fourth O type circle 42 between valve body 1 and control duct 35.
The utility model discloses in, be equipped with screen cloth 37 on the pressure tapping hole on the valve body 1.
The utility model discloses in, 9 central nested attenuator covers 8 of main end cover.
In the utility model discloses, the nested uide bushing 22 of nozzle 5 afterbody.
In the present invention, the pilot valve rod 25 is of a bow-shaped structure.
In the utility model discloses, main valve gap 11 is opened there is control hole 36.
The utility model discloses well guide's relief pressure valve and main relief pressure valve are film type relief pressure valve, full play its sensitivity height, the good structural feature of resistance to pressure. The two film type pressure reducing valves are combined into a pilot spring film type pressure reducing valve, a medium enters the pilot pressure reducing valve from a pilot hole in the valve body 1, the T-shaped hand wheel 30 is rotated clockwise to compress the pilot pressure regulating spring 29, the pilot valve rod 25 is driven, a gap between the valve core 23 and the pilot nozzle 24 is adjusted, the medium enters the main pressure reducing valve from a control hole of the valve body 1 after being subjected to rapid pressure reduction, the main diaphragm assembly is driven to jack the main valve rod 6, the medium is subjected to pressure reduction and enters the downstream, the medium pressure is fed back to the pilot pressure reducing valve from a feedback hole on the outlet side of the valve body 1 to participate in the stress balancing process, and the pressure is rapidly reduced to a set pressure. When the pressure of the front end of the medium fluctuates, the stress balance of the pilot pressure reducing valve and the main pressure reducing valve is broken, if the outlet pressure is higher than the set pressure, the pressure is quickly fed back to the pilot pressure reducing valve, the characteristic of high sensitivity of the diaphragm is fully exerted, the diaphragm and the spring quickly respond, the opening of the pilot pressure reducing valve is reduced, the opening of the main pressure reducing valve is reduced, the stress of the pilot pressure reducing valve and the main pressure reducing valve is quickly balanced again, and vice versa, so that the pressure is always stabilized in the small deviation of the set pressure. The automatic feedback adjustment of the pressure fully exerts the characteristics of quick response and sensitive adjustment of the pilot spring diaphragm type pressure reducing valve, effectively weakens pressure fluctuation and keeps the stability of output pressure. Because the structure can fully utilize the pressure of the medium to participate in the internal stress balance process of the valve, the valve has large design drift diameter, equal pressure and large flow.
The beneficial effects of the utility model reside in that: the utility model discloses with guide's relief pressure valve and main relief pressure valve organic combination, compact structure. The medium entrance is equipped with filter screen 4, can effectively prevent inside impurity gets into the valve to it blocks up the passageway, blocks the valve rod, damages sealed face. Be equipped with screen cloth 37 on the pressure hole of getting on the valve body 1, the damage of prevention filter screen 4 under the extreme condition causes the pressure hole jam, influences manometer 41 measurement accuracy. The damper at the tail part of the main valve rod 6 in the main reducing valve is contacted with the damper sleeve, and the head part of the main valve rod 6 is penetrated through the guide sleeve 22 nested with the main nozzle 5, so that the valve rod can be effectively prevented from being blocked, and the use stability of the valve is improved. The main pressure reducing valve is provided with a limiting plate 17, so that the vibration amplitude of the main adjusting diaphragm assembly is reduced, the vibration of the valve is reduced, and the service life of the main diaphragm 16 is prolonged.
Drawings
FIG. 1 is a cross-sectional view of a pilot operated dual diaphragm regulator valve.
FIG. 2 is a longitudinal cross-sectional view of a pilot operated dual diaphragm regulator valve.
FIG. 3 is a cross-sectional view A-A of a pilot operated dual diaphragm regulator valve.
FIG. 4 is a front view of the pilot valve stem.
Reference numbers in the figures: 1 is a valve body, 2 is a refill joint, 3 is a compression spring, 4 is a filter screen, 5 is a main nozzle, 6 is a main valve rod, 7 is a main pressure regulating spring, 8 is a damper sleeve, 9 is a main end cover, 10 is a first O-ring, 11 is a main valve cover, 12 is a hexagon bolt, 13 is a first diaphragm pressing plate, 14 is a main locking nut, 15 is a second diaphragm pressing plate, 16 is a main diaphragm, 17 is a limiting plate, 18 is a second O-ring, 19 is a pilot end cover, 20 is a third O-ring, 21 is a partition plate, 22 is a guide sleeve, 23 is a valve core, 24 is a pilot nozzle, 25 is a pilot valve rod, 26 is a locking bolt, 27 is a pilot diaphragm, 28 is a pilot locking nut, 29 is a pilot pressure regulating spring, 30 is a T-shaped hand wheel, 31 is a pilot pressure bearing spring, 32 is a spring cover plate, 33 is a pilot valve cover, 34 is a flat cushion, 35 is a control conduit, 36 control holes, 37 screens and 38 feedback holes, Pilot hole 39, plug 40, pressure gauge 41, fourth O-ring 42.
Detailed Description
The present invention will be further described with reference to the following examples and drawings.
Example 1
As shown in fig. 1, fig. 2 and fig. 3, the cross-sectional view of the present invention is given, and the present invention provides a high-performance pilot spring film type pressure reducing valve, which comprises a valve body 1, a bushing joint 2, a compression spring 3, a filter screen 4, a pilot pressure reducing valve and a main pressure reducing valve; the pilot reducing valve is positioned on one side of the valve body 1, and the main reducing valve is positioned in the center of the valve body 1; a filter screen 4 is arranged at a medium inlet of the valve body 1, a compression spring 3 is arranged above the filter screen 4, and the medium inlet of the valve body 1 is connected with a bushing joint 2; the main pressure reducing valve and the pilot pressure reducing valve are communicated through a pilot hole 39, a control hole 36 and a feedback hole 38 of the valve body 1, and the control hole 36 on the valve body 1 is communicated with the main valve cover 11 through a control conduit 35; the fabrication hole of the pilot hole 39 of the valve body 1 is provided with a plug 40 to prevent the upper and lower cavities from being communicated, and the outer end of the fabrication hole is provided with a pressure gauge 41 to detect the output pressure;
the main pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a main nozzle 5, a main valve rod 6, a main pressure regulating spring 7, a main end cover 9, a first O-shaped ring 10, a main valve cover 11, a main diaphragm assembly, a limiting plate 17 and a second O-shaped ring 18, wherein the main nozzle 5 extends into one end of the valve body 1, the valve body 1 and the main end cover 9 are connected through the first O-shaped ring 10, and the main pressure regulating spring 7 is arranged on a concave platform of the main end cover 9; a main valve rod 6 is arranged between the main pressure regulating spring 7 and the main nozzle 5; a second O-shaped ring 18 is arranged between the limiting plate 17 and the valve body 1, a main diaphragm assembly is arranged above the limiting plate 17, the main diaphragm assembly consists of a first diaphragm pressing plate 13, a second diaphragm pressing plate 15 and a main diaphragm 16, the first diaphragm pressing plate 13 and the second diaphragm pressing plate 15 are arranged on the left side and the right side of the main diaphragm 16, and the first diaphragm pressing plate 13, the second diaphragm pressing plate 15 and the main diaphragm 16 are fixed through a main locking nut 14; the edge of the main diaphragm assembly is attached to the main valve cover 11, and the main valve cover 11 and the valve body 1 are fixed through the hexagon bolts, so that good sealing performance of the valve is guaranteed;
the pilot pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a pilot end cover 19, a third O-shaped ring 20, a valve core 23, a pilot nozzle 24, a pilot valve rod 25, a pilot pressure regulating spring 29, a T-shaped hand wheel 30, a pilot pressure bearing spring 31, a pilot valve cover 33 and a pilot diaphragm assembly, the pilot diaphragm assembly consists of a locking bolt 26, a pilot diaphragm 27 and a pilot locking nut 28, and the third O-shaped ring 20 is arranged at the thread tool withdrawal grooves of the valve body 1 and the pilot end cover 19 to ensure the sealing property of the pilot pressure reducing valve; a pilot pressure-bearing spring 31 is arranged in a central concave platform of the pilot end cover 19, one end of the valve core 23 is inserted into the pilot pressure-bearing spring 31, the other end of the valve core is sleeved on the pilot valve rod 25, and the end part of the valve core 23 is connected with the pilot nozzle 24; the pilot valve rod 25 penetrates through the valve body 1 and abuts against the pilot diaphragm assembly, a flat gasket 34 is arranged between the pilot diaphragm assembly and the pilot valve cover 33, the pilot valve cover 33 is in threaded connection with the valve body 1, a pilot pressure regulating spring 29 is arranged below the pilot diaphragm assembly, a spring cover plate 32 is arranged at the joint of the pilot pressure regulating spring 29 and the pilot valve cover 33, and one end of the T-shaped hand wheel 30 abuts against the spring cover plate 32.
A fourth O-ring 42 is provided between the valve body 1 and the control conduit 35.
A screen 37 is arranged on the pressure taking hole on the valve body 1.
The damper sleeve 8 is nested in the center of the main end cover 9.
The tail part of the nozzle 5 is nested with a guide sleeve 22.
The pilot valve rod 25 is of an arch-shaped structure.
The main valve cover 11 is provided with a control hole 36.
Above-mentioned high performance guide spring film formula relief pressure valve, interface: 3/4 NPT; and (3) drift diameter: DN 20; working medium: a gas; working temperature: -10 to +60 ℃; maximum input pressure: 2.4 MPa; maximum output pressure: 1.4 MPa; maximum flow rate: 283m3H; when the pressure of the air source changes +/-0.1 MPa, the change of the outlet pressure is less than 0.5 percent; when the outlet flow fluctuates within the range of 5-100%, the outlet pressure changes by less than 5.5%. The data show that the high-performance pilot spring film type reducing valve has the advantages of compact structure, sensitive adjustment, high response speed, stable and dense pressure adjustmentReliable sealing and wide application range.
Claims (7)
1. A high-performance pilot spring film type pressure reducing valve comprises a valve body (1), a core supplementing joint (2), a compression spring (3), a filter screen (4), a pilot pressure reducing valve and a main pressure reducing valve; the pilot reducing valve is positioned on one side of the valve body (1), and the main reducing valve is positioned in the center of the valve body (1); a filter screen (4) is arranged at a medium inlet of the valve body (1), a compression spring (3) is arranged above the filter screen (4), and the medium inlet of the valve body (1) is connected with a core supplementing joint (2); the main pressure reducing valve and the pilot pressure reducing valve are communicated with a feedback hole (38) through a pilot hole (39) and a control hole (36) of the valve body (1), and the control hole (36) on the valve body (1) is communicated with a main valve cover (11) through a control conduit (35); a plug (40) is arranged in a fabrication hole of a pilot hole (39) of the valve body (1) to prevent the upper cavity and the lower cavity from being communicated, and a pressure gauge (41) is arranged at the outer end of the fabrication hole to detect output pressure;
the main pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a main nozzle (5), a main valve rod (6), a main pressure regulating spring (7), a main end cover (9), a first O-shaped ring (10), a main valve cover (11), a main diaphragm assembly, a limiting plate (17) and a second O-shaped ring (18), wherein the main nozzle (5) extends into one end of the valve body (1), the valve body (1) is connected with the main end cover (9) through the first O-shaped ring (10), and the main pressure regulating spring (7) is arranged on a concave table of the main end cover (9); a main valve rod (6) is arranged between the main pressure regulating spring (7) and the main nozzle (5); a second O-shaped ring (18) is arranged between the limiting plate (17) and the valve body (1), a main diaphragm assembly is arranged above the limiting plate (17), the main diaphragm assembly consists of a first diaphragm pressing plate (13), a second diaphragm pressing plate (15) and a main diaphragm (16), the first diaphragm pressing plate (13) and the second diaphragm pressing plate (15) are arranged on the left side and the right side of the main diaphragm (16), and the first diaphragm pressing plate (13), the second diaphragm pressing plate (15) and the main diaphragm (16) are fixed through a main locking nut (14); the edge of the main diaphragm assembly is attached to the main valve cover (11), and the main valve cover (11) is fixed with the valve body (1) through the hexagon bolts, so that good sealing performance of the valve is guaranteed;
the pilot pressure reducing valve is a spring diaphragm type pressure reducing valve and consists of a pilot end cover (19), a third O-shaped ring (20), a valve core (23), a pilot nozzle (24), a pilot valve rod (25), a pilot pressure regulating spring (29), a T-shaped hand wheel (30), a pilot pressure bearing spring (31), a pilot valve cover (33) and a pilot diaphragm assembly, the pilot diaphragm assembly consists of a locking bolt (26), a pilot diaphragm (27) and a pilot locking nut (28), and the third O-shaped ring (20) is arranged at the thread relief grooves of the valve body (1) and the pilot end cover (19) to ensure the sealing performance of the pilot pressure reducing valve; a pilot pressure-bearing spring (31) is arranged on a central concave platform of the pilot end cover (19), one end of the valve core (23) is inserted into the pilot pressure-bearing spring (31), the other end of the valve core is sleeved on the pilot valve rod (25), and the end part of the valve core (23) is connected with a pilot nozzle (24); the pilot valve rod (25) penetrates through the valve body (1) and abuts against the pilot diaphragm assembly, a flat gasket (34) is arranged between the pilot diaphragm assembly and the pilot valve cover (33), the pilot valve cover (33) is in threaded connection with the valve body (1), a pilot pressure regulating spring (29) is arranged below the pilot diaphragm assembly, a spring cover plate (32) is arranged at the joint of the pilot pressure regulating spring (29) and the pilot valve cover (33), and one end of a T-shaped hand wheel (30) abuts against the spring cover plate (32).
2. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: a fourth O-shaped ring (42) is arranged between the valve body (1) and the control conduit (35).
3. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: a screen (37) is arranged on the pressure taking hole on the valve body (1).
4. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: the damper sleeve (8) is nested in the center of the main end cover (9).
5. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: the tail part of the main nozzle (5) is nested with a guide sleeve (22).
6. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: the pilot valve rod (25) is of an arch-shaped structure.
7. A high performance pilot spring diaphragm pressure relief valve as claimed in claim 1 wherein: the main valve cover (11) is provided with a control hole (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121017282.8U CN214743600U (en) | 2021-05-13 | 2021-05-13 | High-performance pilot spring film type pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121017282.8U CN214743600U (en) | 2021-05-13 | 2021-05-13 | High-performance pilot spring film type pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214743600U true CN214743600U (en) | 2021-11-16 |
Family
ID=78621296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121017282.8U Active CN214743600U (en) | 2021-05-13 | 2021-05-13 | High-performance pilot spring film type pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214743600U (en) |
-
2021
- 2021-05-13 CN CN202121017282.8U patent/CN214743600U/en active Active
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