CN220082274U

CN220082274U - Diaphragm type pressure reducing valve

Info

Publication number: CN220082274U
Application number: CN202321086398.6U
Authority: CN
Inventors: 李威
Original assignee: Fitok Inc
Current assignee: Fitok Inc
Priority date: 2023-05-08
Filing date: 2023-05-08
Publication date: 2023-11-24
Anticipated expiration: 2033-05-08

Abstract

The utility model provides a diaphragm type pressure reducing valve which comprises a valve body, a diaphragm, a stop plate and a pressure ring, wherein the valve body is provided with a valve cavity with an upward opening, an inlet channel and an outlet channel which are communicated with the valve cavity, the diaphragm is arranged in the valve cavity, the pressure ring is arranged on the outer circumferential surface of the diaphragm, the diaphragm is kept in the valve cavity by the pressure ring, the stop plate is arranged on the inner circumferential surface of the diaphragm, an outwards extending branch part is arranged at the bottom of the stop plate, and extends into the lower part of the pressure ring, and the branch part is attached to the diaphragm. According to the utility model, the effective diameter of the stop plate in contact with the diaphragm is increased, so that the effective stress area of the diaphragm is increased, the diaphragm is more sensitive to fluctuation induction of the outlet pressure of the pressure reducing valve, the pressure supply effect of the pressure reducing valve is reduced, and the flow characteristic of the pressure reducing valve is improved.

Description

Diaphragm type pressure reducing valve

Technical Field

The utility model relates to the field of valve control, in particular to a diaphragm type pressure reducing valve.

Background

The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through a series of internal stress balances and automatically keeps the outlet pressure stable by the energy of the medium. The pressure reducing valve can be divided into diaphragm type, piston type, lever type and bellows type according to the structural form. The sensing element of the diaphragm type pressure reducing valve is a diaphragm (film), one side is usually under the action of the pressure of an outlet medium, and the other side is under the action of an adjusting spring force, so that the pressure balance of the diaphragm type pressure reducing valve and the pressure balance of the outlet medium can be achieved, and the outlet pressure of the valve can be accurately controlled.

Most diaphragm type pressure reducing valves in the market at present are realized by utilizing a stop plate above a diaphragm, and the structure of the valve is shown in figure 1. Comprises a valve body 1, a valve core 2, a diaphragm 4, a stop plate 5 and a compression ring 8. The diaphragm 4 is fixed by a press ring 8 above, and a stop plate 5 is also arranged on the diaphragm 4. Effective stress area a of diaphragm 4 _m The larger the pressure, the more the force value that can be fed back fluctuates, and the more sensitive the relief valve is to fluctuations in outlet pressure. According to the effective stress area formula A of the diaphragm _m ＝0.262(D _m ² +D _m d _m +d _m ² ) While when the effective diameter D of the diaphragm 4 _m At constant, the effective diameter d of the stop plate 5 _m Can directly influence the effective stress area A of the diaphragm _m . However, the diaphragm 4 must be fixed by the pressure ring 8, and the stop plate 5 will have an effective diameter d due to the restriction of the pressure ring 8 _m Is limited to a certain value, thereby influencing the effective stress area A of the final membrane _m The sensitivity of the diaphragm type pressure reducing valve to fluctuation of outlet pressure is reduced, so that the pressure supply effect of the pressure reducing valve is large and the flow characteristic is poor.

Disclosure of Invention

The utility model aims to provide a diaphragm type pressure reducing valve, which solves the technical problems of large pressure supply effect and poor flow characteristic of the pressure reducing valve caused by poor sensitivity of the diaphragm to pressure fluctuation of an outlet of the pressure reducing valve because the effective stress area of the diaphragm of the conventional diaphragm type pressure reducing valve is small.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a diaphragm formula relief pressure valve, includes valve body, diaphragm, stop plate, clamping ring, the valve body have the ascending valve pocket of opening and with inlet channel and the outlet channel that link up of valve pocket, the diaphragm sets up in the valve pocket, the clamping ring sets up on the outer periphery of diaphragm, the clamping ring will the diaphragm keeps in the valve pocket, the stop plate sets up on the inner periphery of diaphragm, the stop plate bottom is provided with the branch portion of outwards extending, the branch portion stretch into the clamping ring below, the branch portion with the diaphragm laminating.

Compared with the prior art, the utility model has the beneficial effects that on the premise of not changing the original diaphragm structure, the effective diameter of the stop plate contacted with the diaphragm is increased, so that the effective stress area of the diaphragm is increased, the diaphragm is more sensitive to fluctuation induction of the outlet pressure of the pressure reducing valve, the pressure supply effect of the pressure reducing valve is reduced, and the flow characteristic of the pressure reducing valve is improved.

Drawings

FIG. 1 is a schematic view of a partial structure of a conventional pressure reducing valve;

FIG. 2 is a schematic diagram of a pressure relief valve according to the present inventive concept;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

in the figure: 1. a valve body; 2. a valve core; 3. a support block; 4. a membrane; 5. a stop plate; 6. a valve cap; 7. a range spring; 8. a compression ring; 9. a valve seat; 10. a bonnet nut; 11. a valve core spring; 12. a valve cavity; 13. an inlet channel; 14. an outlet channel; 15. a seal ring; 16. a branch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhanging, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

As shown in fig. 2-3, the diaphragm type pressure reducing valve of the present embodiment includes a valve body 1, a diaphragm 4, a stop plate 5, and a pressure ring 8, where the valve body 1 has a valve cavity 12 with an upward opening, an inlet channel 13, and an outlet channel 14, and the inlet channel 13 and the outlet channel 14 are communicated with the valve cavity 12. A support block 3 is arranged in the valve cavity 12, and the diaphragm 4 is arranged on the support plate 3. The outer circumferential surface of the diaphragm 4 is provided with a compression ring 8, the inner circumferential surface is provided with a stop plate 5, the compression ring 8 compresses the diaphragm 4 on the support plate 3, and a sealing ring 15 is arranged between the support plate 3 and the diaphragm 4. The diaphragm 4 can also be arranged directly in the valve chamber 12 and pressed by the pressing ring 8. A valve cap 6 is arranged above the pressure ring 8, and the valve cap 6 is connected with the valve body 1 through a valve cap nut 10. A range spring 7 is arranged in the valve cap 6, and the range spring 7 is arranged above the stop plate 5 through a spring seat. The valve core 2 is arranged in the inlet channel 13 of the valve body 1, the valve core spring 11 is arranged below the valve core 2, and the valve core spring 11 enables the valve core 2 to be tightly attached to the valve seat 9 in an initial state.

The bottom of the stop plate 5 is provided with an outwardly extending support portion 16, the support portion 16 is bent downwards and can extend into the lower part of the compression ring 8, the support portion 16 is attached to the membrane 4, and the attaching mode is not limited to contact, extrusion, connection and the like, and direct attaching or indirect attaching can be achieved. The branch 16 effectively increases the effective diameter d of the stop plate 5 _m . Compared with the pressure reducing valve with the prior structure, according to A on the premise of not replacing other parts _m ＝0.262(D _m ² +D _m d _m +d _m ² ) Effective diameter D of diaphragm 4 _m Unchanged effective diameter d of stop plate _m The larger the effective stress area A of the diaphragm _m The larger the pressure-reducing valve is, the more the pressure-reducing valve is, so that the diaphragm 4 can sensitively sense the fluctuation of the outlet pressure of the pressure-reducing valve, the pressure-supplying effect of the pressure-reducing valve is reduced, and the flow characteristic of the pressure-reducing valve is improved.

The foregoing describes the basic principles and advantages of the present utility model, and it is to be understood that the above examples are illustrative only of the technical aspects of the present utility model and not limiting thereof. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate from the disclosure that modifications may be made to the solutions recited in the foregoing embodiments, or that equivalents may be substituted for in part or all of the features thereof. Any obvious substitutions without departing from the inventive concept are within the scope of the utility model.

Claims

1. The utility model provides a diaphragm formula relief pressure valve, its characterized in that includes valve body (1), diaphragm (4), stop plate (5), clamping ring (8), valve body (1) have opening ascending valve pocket (12) and with inlet channel (13) and outlet channel (14) that link up of valve pocket (12), diaphragm (4) set up in valve pocket (12), clamping ring (8) set up on the outer periphery of diaphragm (4), clamping ring (8) will diaphragm (4) keep in valve pocket (12), stop plate (5) set up on the inner periphery of diaphragm (4), stop plate (5) bottom is provided with branch portion (16) of outside extension, branch portion (16) stretch into clamping ring (8) below, branch portion (16) with diaphragm (4) laminating.