Diaphragm type pressure stabilizing and reducing valve

Abstract

The utility model provides a diaphragm type pressure stabilizing and reducing valve, and belongs to the field of valves. The problem that an existing pressure reducing valve cannot stabilize pressure is solved. The diaphragm type pressure stabilizing and reducing valve comprises a valve body with a water inlet and a water outlet and a pressure stabilizing assembly, a pressure stabilizing cavity is formed in the valve body, the water inlet and the water outlet of the valve body are communicated with the pressure stabilizing cavity, a water inlet pipe is connected to the water inlet of the valve body, and a valve bonnet and a valve deck are arranged at the upper end and the lower end of the valve body respectively. The pressure stabilizing assembly comprises a valve rod, a valve element, a diaphragm piece, a spring, a water pressing seat and a rubber seat, the valve rod, the valve element, the rubber seat and the water pressing seat are sequentially arranged in the valve body from top to bottom, the diaphragm piece is located between the valve element and the valve rod, the valve rod is provided with a pressing plate, the water inlet pipe and a water inlet of the valve body are of an integrally-formed structure, and the corresponding end penetrates into the valve element. And the water inlet of the valve body is further provided with a filtering assembly used for filtering, and the filtering assembly is matched with the rubber seat. The utility model has the advantage of stable pressure difference.

Description

Technical Field

[0001] The utility model belongs to the field of valves and relates to a pressure reducing valve, in particular to a diaphragm type pressure stabilizing and pressure reducing valve. Background Art

[0002] The diaphragm pressure reducing valve is a type of industrial equipment. It represents a significant improvement over conventional pressure reducing valves. The diaphragm is made of a new material and has a significantly increased working area. Even the slightest changes in upstream pressure or downstream load are promptly and accurately fed back to the main valve diaphragm, regulating the main valve opening and ensuring stable downstream pressure.

[0003] Currently, the structural design of the pressure reducing valve is relatively simple, and it is impossible to maintain stable and consistent pressure at the inlet and outlet of the valve body. Therefore, there is an urgent need to research a pressure reducing valve that can stabilize the inlet and outlet flow pressure regardless of how large the pressure changes. Summary of the Invention

[0004] The purpose of the present invention is to provide a diaphragm type pressure-stabilizing and reducing valve to solve the above problems in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A diaphragm type pressure-stabilizing and pressure-reducing valve, characterized in that it includes a valve body with a water inlet and a water outlet and a pressure-stabilizing component located in the valve body and used for stabilizing pressure, and the valve body has a pressure-stabilizing cavity for installing the pressure-stabilizing component;

[0006] The water inlet and outlet of the valve body are connected to the pressure stabilizing chamber;

[0007] A water inlet pipe with an L-shaped cross section is connected to the water inlet of the valve body;

[0008] The valve body is provided with a valve cap and a valve cover at the upper and lower ends respectively;

[0009] The pressure stabilizing assembly includes a valve stem, a valve core, a diaphragm, a spring, a water pressure seat and a rubber seat;

[0010] The valve stem, valve core, rubber seat and water pressure seat are arranged inside the valve body in sequence from top to bottom;

[0011] The diaphragm is located between the valve core and the valve stem, and is pressed and fixed by the valve cap and the inner and outer threads of the valve body. The valve stem is provided with a pressure plate for pressing and fixing the diaphragm;

[0012] The water inlet pipe and the water inlet of the valve body are integrally formed, and the corresponding ends are inserted into the interior of the valve core and matched with the rubber seat;

[0013] A filter assembly for filtering is also provided at the water inlet of the valve body, and the filter assembly is a split and detachable structure installed inside the water inlet of the valve body.

[0014] In the above-mentioned diaphragm type pressure-stabilizing and reducing valve, the valve cap, valve cover and valve body are all connected through internal and external threads, and a sealing gasket is provided between the connection between the valve cover and the valve body, and the water pressure seat is installed on the valve cover.

[0015] In the above-mentioned diaphragm type pressure-stabilizing and reducing valve, the rubber seat is connected to the water pressure seat through a bolt rod and corresponds to the center of the corresponding end of the water inlet pipe.

[0016] In the above-mentioned diaphragm type pressure-stabilizing and reducing valve, the valve core has through holes on the corresponding sides, the two ends of the valve core are respectively connected to the water pressure seat and the valve stem through internal and external threads, and a guide sleeve is provided between the rubber seat and the valve core.

[0017] In the above-mentioned diaphragm pressure-stabilizing and reducing valve, the filter assembly includes a filter cartridge for filtering and a connecting ring connected to the valve body. The connecting ring and the filter cartridge are integrally formed, and the connecting ring is connected to the water inlet of the valve body by internal and external threads.

[0018] In the above-mentioned diaphragm type pressure-stabilizing and pressure-reducing valve, the valve body is provided with a through hole for facilitating pressure reduction adjustment, the through hole is communicated with the pressure-stabilizing chamber, and a sealing plug is provided in the through hole.

[0019] Compared with the existing technology, this diaphragm pressure-stabilizing and reducing valve has the following advantages:

[0020] 1. The structural design is simple. No matter how large the pressure change at the water inlet is, the outlet set value can be kept stable. The overall structure can be installed horizontally and vertically without affecting normal operation, hydraulic regulation and sealing strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the diaphragm type pressure-stabilizing and reducing valve.

[0022] Figure 2 It is a half-section structural diagram of the diaphragm type pressure-stabilizing and reducing valve.

[0023] In the figure, 1. valve body; 2. water inlet; 3. water outlet; 4. water inlet pipe; 5. valve cap; 6. valve cover; 7. valve stem; 8. valve core; 9. diaphragm; 10. spring; 11. water pressure seat; 12. rubber seat; 13. pressure stabilizing chamber; 14. pressure plate; 15. sealing gasket; 16. filter cartridge; 17. connecting ring; 18. sealing plug. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 、 Figure 2 As shown, the diaphragm type pressure-stabilizing and pressure-reducing valve comprises a valve body 1 with a water inlet 2 and a water outlet 3 and a pressure-stabilizing assembly located in the valve body 1 and used for stabilizing pressure. The valve body 1 has a pressure-stabilizing chamber 13 for installing the pressure-stabilizing assembly therein. The water inlet 2 and the water outlet 3 of the valve body 1 are connected to the pressure-stabilizing chamber 13. A water inlet pipe 4 with an L-shaped cross section is connected to the water inlet 2 of the valve body 1. A valve cap 5 and a valve cover 6 are provided at the upper and lower ends of the valve body 1 respectively. The pressure-stabilizing assembly comprises a valve stem 7, a valve core 8, a diaphragm 9, a spring 10, a water pressure seat 11 and a rubber seat 12. The valve stem 7, the valve core 8, The rubber seat 12 and the water pressure seat 11 are arranged in sequence inside the valve body 1 from top to bottom. The diaphragm 9 is located between the valve core 8 and the valve stem 7, and is tightly fixed with the valve cap 5 and the valve body 1 through the internal and external threaded connection. The valve stem 7 has a pressure plate 14 for pressing and fixing the diaphragm 9. The water inlet pipe 4 and the water inlet 2 of the valve body 1 are an integrally formed structure, and the corresponding ends are inserted into the interior of the valve core 8 and matched with the rubber seat 12. A filter assembly for filtering is also provided at the water inlet 2 of the valve body 1, and the filter assembly is a split and detachable structure installed inside the water inlet 2 of the valve body 1.

[0026] The above structure is simple in design and can keep the outlet set value stable regardless of the large pressure changes at the water inlet 2. The overall structure can be installed horizontally and vertically without affecting normal operation, hydraulic regulation and sealing strength.

[0027] How it works

[0028] The working principle of the pressure stabilizing and reducing valve is based on the pressure balance of two basic points;

[0029] 1. The force exerted downward by the spring 10 to open the valve core 8;

[0030] 2. The force of the diaphragm 9 acting upward to close the valve core 8.

[0031] In the working state when water is used, when the faucet is turned on, the pressure of the spring 10 is greater than the water pressure acting on the lower end of the diaphragm 9, and the valve core 8 moves upward to open the water flow channel. The more downstream faucets are opened, the smaller the water pressure acting on the lower end of the diaphragm, and the greater the flow through the pressure reducing valve.

[0032] In the working state without water, when the faucet is closed, the downstream water pressure increases, pushing the diaphragm 9 upward. The diaphragm 9 pushes upward to make the valve core 8 close the water flow channel, stabilizing the downstream pressure at the set pressure value. The upward force of the diaphragm is higher than the force of the spring 10, which can make the pressure reducing valve close quickly.

[0033] To elaborate further, in order to improve the overall strength of the pressure reducing valve, the valve cap 5, the valve cover 6 and the valve body 1 are all connected through internal and external threads, and a sealing gasket 15 is provided between the connection between the valve cover 6 and the valve body 1, and the water pressure seat 11 is installed on the valve cover 6.

[0034] Preferably, the rubber seat 12 is connected to the water pressure seat 11 through a bolt rod and corresponds to the center of the corresponding end of the water inlet pipe 4.

[0035] Preferably, the valve core 8 has a through hole on the corresponding side, and the two ends of the valve core 8 are respectively connected to the water pressure seat 11 and the valve stem 7 through internal and external threads, and a guide sleeve is provided between the rubber seat 12 and the valve core 8.

[0036] To elaborate further, when the water quality is poor, impurities flowing through the pressure reducing valve are easily accumulated between the valve body 1 and the valve core 8, and the upstream pressure will penetrate into the downstream pressure. Therefore, the pressure after the valve will rise, making the pressure reducing valve unable to close completely. In order to solve the above problem, a filter assembly is installed. The filter assembly includes a filter cartridge 16 for filtering and a connecting ring 17 connected to the valve body 1. The connecting ring 17 and the filter cartridge 16 are an integrally formed structure. The connecting ring 17 is connected to the water inlet 2 of the valve body 1 by internal and external threads. The structural design of the filter assembly can effectively solve the above problem and is convenient for regular cleaning.

[0037] Preferably, the valve body 1 has a through hole for facilitating pressure reduction adjustment, the through hole is connected to the pressure stabilizing chamber 13, and a sealing plug 18 is provided in the through hole.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0039] Although this article uses more terms, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A diaphragm type pressure-stabilizing and reducing valve, characterized in that: It comprises a valve body (1) having a water inlet (2) and a water outlet (3) and a pressure stabilizing component located in the valve body (1) and used for stabilizing pressure, wherein the valve body (1) has a pressure stabilizing chamber (13) inside which the pressure stabilizing component is installed; The water inlet (2) and the water outlet (3) of the valve body (1) are connected to the pressure stabilizing chamber (13); A water inlet pipe (4) having an L-shaped cross section is connected to the water inlet (2) of the valve body (1); The valve body (1) is provided with a valve cap (5) and a valve cover (6) at the upper and lower ends respectively; The pressure stabilizing assembly comprises a valve stem (7), a valve core (8), a diaphragm (9), a spring (10), a water pressure seat (11) and a rubber seat (12); The valve stem (7), valve core (8), rubber seat (12) and water pressure seat (11) are sequentially arranged inside the valve body (1) from top to bottom; The diaphragm (9) is located between the valve core (8) and the valve stem (7), and is pressed and fixed by the valve cap (5) and the valve body (1) through internal and external threaded connection. The valve stem (7) has a pressure plate (14) for pressing and fixing the diaphragm (9); The water inlet pipe (4) and the water inlet (2) of the valve body (1) are integrally formed structures, and the corresponding ends penetrate into the interior of the valve core (8) and match with the rubber seat (12); A filter assembly for filtering is also provided at the water inlet (2) of the valve body (1), and the filter assembly is a split-type detachable structure installed inside the water inlet (2) of the valve body (1).

2. A diaphragm type pressure-stabilizing and reducing valve according to claim 1, characterized in that: The valve cap (5), the valve cover (6) and the valve body (1) are all connected by means of internal and external threads, a sealing gasket (15) is provided between the connection between the valve cover (6) and the valve body (1), and the water pressure seat (11) is mounted on the valve cover (6).

3. The diaphragm type pressure-stabilizing and reducing valve according to claim 1, characterized in that: The rubber seat (12) is connected to the water pressure seat (11) via a bolt rod and corresponds to the center of the corresponding end of the water inlet pipe (4).

4. The diaphragm type pressure-stabilizing and reducing valve according to claim 1, characterized in that: The valve core (8) has through holes on corresponding sides, and both ends of the valve core (8) are connected to the water pressure seat (11) and the valve stem (7) respectively through internal and external threads, and a guide sleeve is provided between the rubber seat (12) and the valve core (8).

5. The diaphragm type pressure-stabilizing and reducing valve according to claim 1, characterized in that: The filter assembly comprises a filter cartridge (16) for filtering and a connecting ring (17) connected to the valve body (1); the connecting ring (17) and the filter cartridge (16) are integrally formed, and the connecting ring (17) is connected to the water inlet (2) of the valve body (1) by means of internal and external threads.

6. The diaphragm type pressure-stabilizing and reducing valve according to claim 1, characterized in that: The valve body (1) has a through hole for facilitating pressure reduction adjustment, the through hole is connected to the pressure stabilizing chamber (13), and a sealing plug (18) is provided in the through hole.

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