阅读说明：本技术 一种多功能先导式给水阀 (Multifunctional pilot-operated water supply valve ) 是由 刘建平 刘峰 于 2019-11-05 设计创作，主要内容包括：本发明是提供一种多功能于一体,可在水质较差的环境下工作可靠且不出故障,同时在给水系统出现负压状态时能确保排出的水不能返流回供水管道的防虹吸功能的多功能先导式给水阀。本发明是在先导式给水阀的结构基础上,在进水管壁上设置滤网,确保流入限流小孔的水比较洁净,不会将限流小孔堵塞,保证阀门工作可靠不出现漏水现象,在给水的工作状态下水流会将停留在滤网上的杂质冲洗并带走；同时,在通往限流小孔的先导通管中设置单向阀,使水流只能从滤网流经单向阀,再进入限流小孔,再流入先导腔,先导腔中的水绝不能返流回进水管道,以此来保持先导腔始终处于正压力,阀门组件紧贴排水口不能开启。(The invention provides a multifunctional pilot-operated water supply valve with an anti-siphon function, which integrates multiple functions, can work reliably and does not go wrong in an environment with poor water quality, and can ensure that discharged water cannot flow back to a water supply pipeline when a water supply system is in a negative pressure state. The invention is based on the structure of the guide type water supply valve, the filter screen is arranged on the wall of the water inlet pipe, so that the water flowing into the small flow limiting holes is ensured to be relatively clean, the small flow limiting holes cannot be blocked, the valve is ensured to work reliably without water leakage, and the water flow can flush and take away impurities staying on the filter screen in the working state of water supply; meanwhile, a one-way valve is arranged in the pilot through pipe leading to the small flow-limiting hole, so that water flow can only flow through the one-way valve from the filter screen, then enters the small flow-limiting hole and then flows into the pilot cavity, water in the pilot cavity can not flow back to the water inlet pipeline, the pilot cavity is kept in positive pressure all the time, and the valve component is tightly attached to the water outlet and can not be opened.)

1. A multifunctional pilot-operated water supply valve is characterized in that: the integrated valve consists of a pressure cavity, a pilot hole, an actuator, a valve component, a spring, a pilot through pipe, a flow-limiting small hole, a one-way valve, a filter screen, a water inlet pipe, a water outlet pipe and a water outlet.

2. The multi-function pilot operated drain valve according to claim 1, wherein: the pilot cavity and the pressure cavity are formed by separating the main body by a valve component; the pilot cavity is characterized in that a pilot hole is formed in the pilot cavity, an actuator is arranged on the pilot hole, a pressure spring is arranged on a valve component in the pilot cavity, and the spring is constantly pressed on the valve component to enable the valve to be tightly attached to the water outlet.

3. The multi-functional pilot operated water supply valve as claimed in claim 1, wherein: the pressure cavity is provided with a water inlet pipe, a water discharge pipe and a water discharge port.

4. The multi-functional pilot operated water supply valve as claimed in claim 1, wherein: the water inlet end of the pilot through pipe is communicated with a water inlet pipe on the pressure cavity, an annular filter screen is arranged on the pipe wall of the water inlet pipe, only purified water passing through the filter screen can flow into the pilot through pipe, a one-way valve is arranged in the pilot through pipe and can prevent water from flowing back to the water inlet pipe, a water outlet at the other end of the pilot through pipe is a small flow limiting hole, and the small flow limiting hole is arranged on the inner wall of the pilot cavity and communicated with the pilot cavity.

5. The multi-functional pilot operated water supply valve as claimed in claim 1, wherein: the techniques described herein are applicable to a variety of pilot-operated valve and pilot-operated valve actuators; the patent technology is not limited to the structure form of the water inlet and outlet of the pilot valve.

Technical Field

The invention belongs to a pilot-operated water supply valve in the technical field of valves, and relates to a water supply actuator in production and living equipment.

Background

The pilot valve is widely applied in the environment of intelligent manufacture and is an indispensable control actuator for production and living equipment. Its reliability is related to the quality of the whole equipment. Due to the technical characteristics of the pilot valve, the requirement on the purity of the fluid is high, so that the defect of the valve applied to the water environment is obvious. Therefore, in order to improve the purity of water, people add water filtering equipment, and the filter needs to be cleaned frequently, so that the trouble is increased for equipment maintenance; in order to ensure the safety of tap water and drinking water, the anti-siphon forcing standard of a water feeder for a tap water system is provided in all countries in the world, and as the existing pilot valve has no anti-siphon function, an anti-siphon mechanism can be added in a tap water pipeline of equipment to meet the standard requirement; but it has large volume, poor reliability and inconvenient installation. Therefore, according to the short plate of the prior pilot valve, the multifunctional pilot type water supply valve is needed to be developed, and the market prospect is wide.

Disclosure of Invention

The invention provides a multifunctional pilot-operated water supply valve with an anti-siphon function, which integrates multiple functions, can work reliably and does not go wrong in an environment with poor water quality, and can ensure that discharged water cannot flow back to a water supply pipeline when a water supply system is in a negative pressure state. The invention is based on the structure of the guide type water supply valve, the filter screen is arranged on the wall of the water inlet pipe, so that the water flowing into the small flow limiting holes is ensured to be relatively clean, the small flow limiting holes cannot be blocked, the valve is ensured to work reliably without water leakage, and the water flow can flush and take away impurities staying on the filter screen in the working state of water supply; meanwhile, a one-way valve is arranged in the pilot through pipe leading to the small flow-limiting hole, so that water flow can only flow through the one-way valve from the filter screen, then enters the small flow-limiting hole and then flows into the pilot cavity, water in the pilot cavity can not flow back to the water inlet pipeline, the pilot cavity is kept in positive pressure all the time, and the valve component is tightly attached to the water outlet and can not be opened.

The invention is realized by the following technical scheme:

the invention adds a ring filter screen on the pipe wall of the pressure cavity water inlet pipe of the pilot feed water valve, adds a check valve in the pipeline leading the filter screen to the small flow-limiting hole of the pilot cavity, the water entering the pilot cavity must be filtered by the filter, the cleaner water enters the small flow-limiting hole from the pilot pipe and the check valve, ensures the small flow-limiting hole not to be blocked, the pilot feed water valve will not be out of order, the impurity filtered by the filter screen stays on the surface of the filter screen, when the valve is out of water, the water flow passes through the surface of the filter screen, the impurity on the filter screen is taken away by the flow impact force of the water, the filter screen is cleaned, therefore, the filter screen will not be blocked, and the trouble of cleaning; when negative pressure occurs in the tap water pipeline, water in the pilot cavity cannot flow backwards due to the action of the one-way valve, the pilot cavity cannot generate negative pressure, the pressure cavity generates negative pressure, the pressure area of the valve component in the pilot cavity is larger than that of the valve component in the pressure cavity, at the moment, the pilot cavity is positive pressure, the pressure cavity is negative pressure, the valve component is tightly pressed on the water outlet, and water flowing out of the water outlet cannot flow back into the water inlet pipe from the water outlet at any point; because the filter screen and the one-way valve are added on the pilot valve, the pilot type water supply valve is more in line with various water environments without failure, and simultaneously meets the national mandatory standard of anti-siphon of the water supply valve, so that the pilot valve has wider application, is more convenient and is more reliable.

Drawings

FIG. 1 is a view showing the structure of a product of the present invention

FIG. 2 is a diagram of the normally closed operating condition of the present invention

FIG. 3 is a water supply state diagram of the present invention

FIG. 4 is a view showing the state of the anti-siphon operation of the present invention

Description of the figures

A pressure cavity B, a pilot cavity 1, a pilot hole 2, an actuator 3, a valve assembly 4, a spring 5, a pilot through pipe 6, a flow-limiting small hole 7, a check valve 8, a filter screen 9, a water inlet pipe 10, a water outlet pipe 11, a water outlet

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

The invention will now be further described with reference to figure 1. FIG. 1 is a diagram of the structure of the product of the present invention. The invention relates to a multifunctional pilot-operated water supply valve, which is an integrated valve consisting of a pressure cavity A, a pilot cavity B, a pilot hole 1, an actuator 2, a valve component 3, a spring 4, a pilot-operated through pipe 5, a flow-limiting small hole 6, a one-way valve 7, a filter screen 8, a water inlet pipe 9, a water discharge pipe 10 and a water discharge port 11.

The invention will now be further described with reference to fig. 2. Fig. 2 is a diagram of the normally closed operating condition of the present invention. The pilot chamber B and the pressure chamber A are formed by dividing the main body by a valve component 3. When water comes, the water flows into the pressure cavity A from the water inlet pipe 9 and flows through the filter screen 8 arranged on the pipe wall, the filtered water flows into the pilot through pipe 5 behind the filter screen 8, and then flows into the flow-limiting small hole 6 through the one-way valve 7 and enters the pilot cavity B, because the actuator 2 is in a normally closed state, the pressure in the pilot cavity B keeps balance with the pressure of tap water, because the pressure bearing area of the valve component 3 in the pilot cavity B is larger than that of the pressure cavity, the valve component 3 always presses towards the water outlet 11, and therefore, the pilot water-feeding valve is in a closed state and cannot discharge water.

The invention will now be further described with reference to fig. 3. Fig. 3 is a water supply state diagram of the present invention. When the actuator 2 is started, water in the pilot cavity B flows into the water outlet 11 from the pilot hole 1 under the water pressure state, and because the aperture of the pilot hole 1 is larger than that of the small flow-limiting hole 6, the water quantity flowing into the pilot cavity B from the small flow-limiting hole 6 cannot offset the water quantity flowing out of the pilot hole 1, and the pilot cavity B loses pressure; therefore, under the action of the water pressure in the pressure cavity A, the pressure of the spring 4 is overcome, the valve component 3 is pushed to the guide cavity B and is simultaneously separated from the water outlet 11, the water in the pressure cavity A flows out from the water outlet 11, the water from the water inlet pipe 9 continuously flows into the pressure cavity A, the pressure of the pressure cavity A is maintained, and the valve component 3 is always in an open state; when water flows through the filter screen 8, the surface of the filter screen 8 can be washed due to high flow velocity, solid substances staying on the filter screen 8 are taken away, and the solid substances are discharged along with the water.

The invention will now be further described with reference to fig. 4. Fig. 4 is a view showing an anti-siphon operation state of the present invention. When the tap water pipe generates negative pressure, the pressure cavity A also generates negative pressure, and due to the action of the one-way valve 7 in the pilot through pipe 5, water in the pilot cavity B cannot flow back to the water inlet pipe 9 from the small flow-limiting hole 6, so that the inside of the pilot cavity B is always in a positive pressure state, and in addition, the pressure of the spring 4, the valve component 3 is always pressed on the water outlet 11, and water flowing out of the water outlet 11 cannot flow back to the water inlet pipe 9 from the water outlet 11 at all times, so that the function that discharged water cannot flow back at all times when negative pressure is generated is ensured.

The above description is only a preferred embodiment of the present invention, and the techniques described herein can be applied to various pilot-operated valve and pilot-operated valve actuators; the technology of the invention is not limited to the structural form of the water inlet and outlet of the pilot valve.