A backflow preventing water inlet valve

Abstract

The utility model provides a kind of with non-return water inlet valve, belong to valve technical field.It solves the existing water inlet valve many parts, complex structure, low assembly efficiency, and do not have non-return function, lead to liquid backflow thereby causing pump body overturn and container leakage and other problems.This with non-return water inlet valve, including valve main body, water inlet pipe for water inlet and water outlet pipe for water outlet are provided on valve main body, opening is provided in valve main body for two pipes intercommunication, valve main body is provided with valve core, and valve core upper end portion is connected with valve rod, fixed part is arranged in the opening in valve main body, fixed part lower end is provided with water pass hole one, slot is opened in the upper end of fixed part, the upper end of fixed part and located slot place are provided with two non-return elements, and every non-return element is provided with a plurality of water pass holes two for water pass.The utility model has the advantages of with non-return function.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and relates to a water inlet valve, and particularly to a water inlet valve with a check valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the transported medium. Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, or overflow pressure relief.

[0003] Existing inlet valves have many components, complex structures, low assembly efficiency, and lack a check valve function, which leads to liquid backflow and causes problems such as pump body overturning and container leakage. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a reasonably designed inlet valve with a check valve function.

[0005] The objective of this utility model can be achieved through the following technical solution: A check valve includes a valve body, on which an inlet pipe for water intake and an outlet pipe for water output are provided. An opening is provided inside the valve body for the two pipes to connect. A valve core is provided inside the valve body, and a valve stem is connected to the upper end of the valve core. The valve body is characterized by a fixed component with an internal cavity located inside the opening. A water passage hole (I) for water passage is provided at the lower end of the fixed component. The valve core extends into the fixed component and controls the opening and closing of the water passage hole (I) on the fixed component. A slot is provided at the upper end of the fixed component. Two check valves (II) for check valves are provided at the upper end of the fixed component located at the slot. Each check valve has several water passage holes (II) for water passage. One end of each check valve extends into the fixed component and a return spring is provided between them. The other end of each check valve extends out of the fixed component and is connected to a water-blocking part. The water-blocking part moves up and down under the action of the return spring, thereby controlling the opening and closing of the water passage holes (II).

[0006] In the aforementioned inlet valve with a check valve, the check valve is mounted on the fixing member, and a retaining ring is provided on one end of the check valve located in the cavity of the fixing member.

[0007] In the aforementioned inlet valve with check valve, the front end of the valve core is T-shaped, and the fixing member has a stepped groove that matches the valve core.

[0008] Compared with existing technologies, this inlet valve with check valve has internal fixing components and check valve components, which makes the structure simple and easy to disassemble and assemble. During the use of the valve, it also has a check valve function, which improves the service life of the valve. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram, 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Opening; 5. Valve core; 6. Valve stem; 7. Fixing component; 8. Check valve; 9. Return spring; 10. Water blocking part; 11. Water passage hole one; 12. Water passage hole two. Detailed Implementation

[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0012] like Figure 1 As shown, this inlet valve with check valve includes a valve body 1. The valve body 1 has an inlet pipe 2 for water inlet and an outlet pipe 3 for water outlet. An opening 4 is provided inside the valve body 1 to connect the two pipes. A valve core 5 is provided inside the valve body 1, and a valve stem 6 is connected to the upper end of the valve core 5. A fixing member 7 with an internal cavity is provided inside the valve body 1 at the opening 4. A water passage hole 11 is provided at the lower end of the fixing member 7 for water passage. The valve core 5 extends into the fixing member 7 and is fixed in place. The water passage hole 11 on the component 7 is open and closed. The upper end of the fixed component 7 is provided with a slot. The upper end of the fixed component 7 and located at the slot are provided with two check elements 8 for preventing backflow. Each check element 8 is provided with several water passage holes 12 for water to pass through. One end of the check element 8 extends into the fixed component 7 and a return spring 9 is provided between the check element 8 and the fixed component 7. The other end of the check element 8 extends out of the fixed component 7 and is connected to a water blocking part 10. The water blocking part 10 is raised and lowered by the action of the return spring 9 to control the opening and closing of the water passage holes 12.

[0013] To elaborate further on the flow of the liquid, the liquid flows in from the inlet pipe 2, and enters the cavity of the fixing part 7 through the opening 4 in the valve body 1 and the water passage hole 11 on the fixing part 7. Then it flows out through the water passage hole 12 of the fixing part 7 and flows out from the outlet pipe 3.

[0014] To further explain the check valve effect, rotating the valve stem 6 causes the valve core 5 to move upward, allowing liquid to flow from the opening 4 and the first water passage 11 into the cavity of the fixing part 7. The upward movement of the valve core 5 causes the check valve 8 to move upward, thereby opening the second water passage 12. When the valve is closed, the valve core 5 moves downward, and the opening 4 and the first water passage 11 are closed. The return spring 9 rebounds, resetting the check valve 8. The water-blocking part 10 on the check valve 8 returns to its original position, re-closing the second water passage 12 and preventing the liquid in the outlet pipe 3 from flowing back.

[0015] To elaborate further, the check valve 8 is inserted through the fixing member 7, and a retaining ring is provided on one end of the check valve 8 located in the cavity of the fixing member 7.

[0016] To elaborate further, the front end of the valve core 5 is designed with a T-shaped structure, and the fixing member 7 has a stepped groove that matches the valve core 5.

[0017] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0018] Although this document frequently uses terms such as valve body 1, inlet pipe 2, outlet pipe 3, opening 4, valve core 5, valve stem 6, fixing part 7, check valve 8, return spring 9, water-blocking part 10, water passage hole one 11, and water passage hole two 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A check valve for inlet water, comprising a valve body (1), wherein the valve body (1) is provided with an inlet pipe (2) for inlet water and an outlet pipe (3) for outlet water, wherein the valve body (1) has an opening (4) for connecting the two pipes, wherein the valve body (1) is provided with a valve core (5), and a valve stem (6) is connected to the upper end of the valve core (5), characterized in that, The valve body (1) is provided with a fixing member (7) with an internal cavity at the opening (4). The lower end of the fixing member (7) is provided with a water passage hole (11) for water passage. The valve core (5) extends into the fixing member (7) and controls the opening and closing of the water passage hole (11) on the fixing member (7). The upper end of the fixing member (7) is provided with a slot. The upper end of the fixing member (7) and the slot are provided with two check members (8) for check. Each check member (8) is provided with several water passage holes (12) for water passage. One end of the check member (8) extends into the fixing member (7) and a return spring (9) is provided between it and the fixing member (7). The other end of the check member (8) extends out of the fixing member (7) and is connected to a water blocking part (10). The water blocking part (10) is raised and lowered by the action of the return spring (9) to control the opening and closing of the water passage holes (12).

2. The inlet valve with check valve according to claim 1, characterized in that, The check valve (8) is inserted through the fixing member (7), and a retaining ring is provided on one end of the cavity of the fixing member (7) of the check valve (8).

3. A water inlet valve with a check valve according to claim 1, characterized in that, The front end of the valve core (5) is T-shaped, and the fixing member (7) has a stepped groove that matches the valve core (5).

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