CN214404831U - Micro-pressure reducing valve - Google Patents
Micro-pressure reducing valve Download PDFInfo
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- CN214404831U CN214404831U CN202021957875.8U CN202021957875U CN214404831U CN 214404831 U CN214404831 U CN 214404831U CN 202021957875 U CN202021957875 U CN 202021957875U CN 214404831 U CN214404831 U CN 214404831U
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Abstract
The utility model discloses a micro-pressure reducing valve, including first upper bonnet, cup joint in first case in the upper bonnet, be fixed in first membrane head subassembly on the first case, establish the cavity of a through-hole in the first upper bonnet, the one end of first case is passed cavity in the first upper bonnet extends to first membrane head subassembly, first membrane head subassembly include first upper bonnet and with first upper bonnet fixed connection's first membrane lid down, first upper bonnet is the plate structure with the both ends of first membrane lid, first upper bonnet is concave type with the intermediate part of first membrane lid, and the concave type of the intermediate part of first upper bonnet and first membrane lid is in opposite directions, form a cavity between the intermediate part of first upper bonnet and first membrane lid. According to the utility model discloses, simple structure is practical, can follow 0.7Mpa decompression to 2Kpa moreover, the dependable performance, and small and light in weight.
Description
Technical Field
The utility model relates to a technical field of relief pressure valve, in particular to minute-pressure relief pressure valve.
Background
The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable 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 pressure reduction. Then, the fluctuation of the pressure behind the valve is balanced with the spring force by means of the regulation of the control and regulation system, so that the pressure behind the valve is kept constant within a certain error range.
However, the conventional pressure reducing valve has a complicated structure and a small pressure reducing range, and can perform a certain pressure reducing action only in a small range.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists among the prior art, the utility model aims at providing a minute-pressure relief valve, simple structure is practical, can follow 0.7Mpa decompression to 2Kpa moreover, the dependable performance, small and light in weight. In order to achieve the above objects and other advantages in accordance with the present invention, there is provided a micro pressure reducing valve, including:
the valve comprises a first upper valve cover, a first valve core sleeved in the first upper valve cover and a first membrane head assembly fixed on the first valve core, wherein a cavity with a through hole is arranged in the first upper valve cover;
the first membrane head assembly comprises a first upper membrane cover and a first lower membrane cover fixedly connected with the first upper membrane cover, two end portions of the first upper membrane cover and two end portions of the first lower membrane cover are both of flat plate structures, the middle portion of the first upper membrane cover and the middle portion of the first lower membrane cover are concave, the concave portions of the middle portions of the first upper membrane cover and the first lower membrane cover face each other, a cavity is formed between the middle portions of the first upper membrane cover and the first lower membrane cover, and one end portion of the first valve core extends into the cavity.
Preferably, threaded connection has first nut on one end of the first case, the lower terminal surface contact of first nut has the gasket, the lower terminal surface contact of gasket has first pressure disk, first pressure disk joint in on one end of the first case, just the jam has the diaphragm in the first pressure disk, the both ends of diaphragm are fixed in the both ends between first upper membrane lid and the first lower membrane lid respectively, the diaphragm is the elasticity shell fragment.
Preferably, a first connecting hole has been seted up to the upper end of first upper membrane lid, the rigid coupling has a first fixed block on the first connecting hole, the rigid coupling has the pressure gauge on the first fixed block, just a first holding tank has been seted up to the inside of first fixed block, first holding tank with first nut phase-match.
Preferably, the lower end face of the first valve core is connected with a first piston in a clamping mode, the first piston is connected with a first O-shaped ring in a sleeved mode, the first O-shaped ring is in interference fit with a first upper valve cover, the lower end of the first piston is connected with a pressure reduction valve clack in a clamping mode, the lower end of the pressure reduction valve clack is connected with a first lower valve cover in a clamping mode, the pressure reduction valve clack is connected with a first U-shaped ring in a sleeved mode, and the first U-shaped ring is in interference fit with the inner surface of the first lower valve cover.
Preferably, the lower end of the first upper valve cover is fixedly connected with a valve body, the lower end of the valve body is fixedly connected with a first lower valve cover, a cavity is formed in the first lower valve cover, a first spring is placed in the cavity, one end of the first spring abuts against an inner groove of the pressure reduction valve clack, the other end of the first spring is fixedly connected with a first fixing seat, a first adjusting screw rod is fixedly connected to the first fixing seat, and the first adjusting screw rod is in threaded connection with the first lower valve cover.
Compared with the prior art, the utility model, its beneficial effect is: the pressure reducing valve controls the action of the valve via the control cavity, the control cavity is communicated with the pressure behind the valve via the small hole, when the pressure behind the valve fluctuates, the control cavity pushes the valve clack to act to keep the pressure stable, and the pressure gauge displays the pressure for stabilizing the pressure.
Drawings
Fig. 1 is a half sectional view of a minute pressure reducing valve according to the present invention.
In the figure: 21. a pressure gauge; 22. a first fixed block; 23. a first membrane head assembly; 231. a first upper film; 232. a first lower film cover; 24. a first upper bonnet; 25. a membrane; 26. a valve body; a first O-ring; 28. a first valve spool; 29. a first piston; 210. a pressure reducing valve flap; 211. a first U-shaped ring; 212. a first spring; 213. a first lower valve cover; 214. a first adjusting screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a micro pressure reducing valve includes: the valve comprises a first upper valve cover 24, a first valve core 28 sleeved in the first upper valve cover 24 and a first membrane head assembly 23 fixed on the first valve core 28, wherein a cavity with a through hole is arranged in the first upper valve cover 24, one end of the first valve core 28 penetrates through the cavity in the first upper valve cover 24 and extends into the first membrane head assembly 23, a through groove is formed in the center of the first valve core 28, and a first through groove is formed in one side surface of the first valve core 28 positioned at the bottom end;
the first membrane head assembly 23 includes a first upper membrane cover 231 and a first lower membrane cover 232 fixedly connected to the first upper membrane cover 231, both end portions of the first upper membrane cover 231 and the first lower membrane cover 232 are flat plate structures, a middle portion of the first upper membrane cover 231 and a middle portion of the first lower membrane cover 232 are concave, the concave portions of the middle portions of the first upper membrane cover 231 and the first lower membrane cover 232 face each other, a cavity is formed between the middle portions of the first upper membrane cover 231 and the first lower membrane cover 232, and one end portion of the first valve element 28 extends into the cavity.
Further, threaded connection has a first nut on 28 one end portions of first case, the lower terminal surface contact of first nut has the gasket, the lower terminal surface contact of gasket has first pressure disk, first pressure disk joint in on 28 one end portions of first case, just the jam has diaphragm 25 in the first pressure disk, the both ends of diaphragm 25 are fixed in the both ends between first upper membrane lid 231 and the first lower membrane lid 232 respectively, diaphragm 25 is the elasticity shell fragment.
Further, a first connecting hole has been seted up to the upper end of first upper membrane lid 231, the rigid coupling has a first fixed block 22 on the first connecting hole, the rigid coupling has pressure gauge 21 on the first fixed block 22, just a first holding tank has been seted up to the inside of first fixed block 22, first holding tank with first nut phase-match.
Further, the lower end surface of the first valve core 28 is connected with a first piston 29 in a clamping manner, the first piston 29 is connected with a first O-ring 27 in a sleeved manner, the first O-ring 27 is in interference fit with the first upper valve cover 24, the lower end of the first piston 29 is connected with a pressure reduction valve clack 210 in a clamping manner, the lower end of the pressure reduction valve clack 210 is connected with a first lower valve cover 213 in a clamping manner, the pressure reduction valve clack 210 is connected with a first U-shaped ring 211 in a sleeved manner, and the inner surface of the first U-shaped ring 211 is in interference fit with the first lower valve cover 213.
Further, the lower end of the first upper valve cover 24 is fixedly connected with the valve body 26, the lower end of the valve body 26 is fixedly connected with a first lower valve cover 213, a cavity is formed in the first lower valve cover 213, a first spring 212 is placed in the cavity, one end of the first spring abuts against an inner groove of the pressure reduction valve clack 210, the other end of the first spring is fixedly connected with a first fixed seat, the first fixed seat is fixedly connected with a first adjusting screw 214, and the first adjusting screw 214 is in threaded connection with the first lower valve cover 213.
The working principle is as follows: the pressure reducing valve is opened and closed by driving the valve directly by the secondary side outlet pressure, so that when the outlet pressure is less than the set pressure, the valve is automatically opened, and when the valve is to reach the full-open position, the valve is related to the pressure adjustable range and the set pressure, the pressure reducing valve controls the action of the valve by the control cavity, the control cavity is communicated with the pressure after the valve through a small hole, when the pressure after the valve fluctuates, the control cavity pushes the pressure reducing valve clack 210 to act, the pressure is kept stable, and the pressure gauge 21 displays the pressure for stabilizing the pressure.
The number of devices and the scale of the processes described herein are intended to simplify the description of the present invention, and applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application suitable for this invention, and further modifications may be readily made by those skilled in the art, and the invention is therefore not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (3)
1. A micro-pressure relief valve, comprising:
the valve core assembly comprises a first upper valve cover (24), a first valve core (28) sleeved in the first upper valve cover (24), and a first membrane head assembly (23) fixed on the first valve core (28), wherein a cavity with a through hole is arranged in the first upper valve cover (24), one end of the first valve core (28) penetrates through the cavity in the first upper valve cover (24) and extends into the first membrane head assembly (23), a through groove is formed in the center of the first valve core (28), and a first through groove is formed in one side surface of the first valve core (28) positioned at the end of the bottom;
the first membrane head assembly (23) comprises a first upper membrane cover (231) and a first lower membrane cover (232) fixedly connected with the first upper membrane cover (231), two end parts of the first upper membrane cover (231) and the first lower membrane cover (232) are both of flat plate structures, the middle parts of the first upper membrane cover (231) and the first lower membrane cover (232) are concave, the concave parts of the middle parts of the first upper membrane cover (231) and the first lower membrane cover (232) are opposite, a cavity is formed between the middle parts of the first upper membrane cover (231) and the first lower membrane cover (232), and one end part of the first valve core (28) extends into the cavity;
the lower end face of the first valve core (28) is connected with a first piston (29) in a clamping mode, the first piston (29) is sleeved with a first O-shaped ring (27), the first O-shaped ring (27) is in interference fit with a first upper valve cover (24), the lower end of the first piston (29) is connected with a pressure reduction valve clack (210) in a clamping mode, the lower end of the pressure reduction valve clack (210) is connected with a first lower valve cover (213) in a clamping mode, the pressure reduction valve clack (210) is sleeved with a first U-shaped ring (211), and the first U-shaped ring (211) is in interference fit with the inner surface of the first lower valve cover (213);
the lower extreme rigid coupling of first upper valve lid (24) has valve body (26), just the lower extreme rigid coupling of valve body (26) has first lower valve lid (213), be the cavity in first lower valve lid (213), place first spring (212) in the cavity, the one end of first spring is contradicted in the inside groove of decompression valve clack (210), and the other end rigid coupling has first fixing base, the rigid coupling has first adjusting screw (214) on the first fixing base, first adjusting screw (214) threaded connection is on first lower valve lid (213).
2. The micro-pressure reducing valve according to claim 1, wherein a first nut is connected to one end of the first valve element (28) in a threaded manner, a gasket is in contact with the lower end face of the first nut, a first pressure plate is in contact with the lower end face of the gasket, the first pressure plate is clamped to one end of the first valve element (28), a diaphragm (25) is clamped in the first pressure plate, two ends of the diaphragm (25) are fixed to two ends between the first upper diaphragm cover (231) and the first lower diaphragm cover (232), and the diaphragm (25) is an elastic sheet.
3. The micro-pressure reducing valve according to claim 2, wherein a first connecting hole is formed at an upper end of the first upper film cover (231), a first fixing block (22) is fixedly connected to the first connecting hole, a pressure gauge (21) is fixedly connected to the first fixing block (22), and a first accommodating groove is formed inside the first fixing block (22) and matched with the first nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021957875.8U CN214404831U (en) | 2020-09-09 | 2020-09-09 | Micro-pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021957875.8U CN214404831U (en) | 2020-09-09 | 2020-09-09 | Micro-pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214404831U true CN214404831U (en) | 2021-10-15 |
Family
ID=78017659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021957875.8U Active CN214404831U (en) | 2020-09-09 | 2020-09-09 | Micro-pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214404831U (en) |
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2020
- 2020-09-09 CN CN202021957875.8U patent/CN214404831U/en active Active
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