Check valve with filtering function

Abstract

The utility model provides a check valve with filtering function belongs to valve technical field. It solved the problem that the existing check valve not only prevents medium backflow, still has to filter medium. This check valve with filtering function, including valve main part, be provided with the water passage in the valve main part, be provided with the valve element in the valve main part, be provided with the water outlet pipeline on the valve main part, be provided with check element on the water outlet pipeline, be provided with fixed part on the check element, set up the water hole on the lateral wall on fixed part, be provided with check structure in fixed part, check structure includes piston element, movable rod and connecting spring, fixed part has the movable space for piston element moves back and forth in, be provided with the mounting portion in the check element, be provided with filter screen on the mounting portion. The utility model has the advantages of with filtering function.

Description

Technical Field

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

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve.

[0003] In daily production, check valves are becoming increasingly diverse and widely used in various fields. However, the check valves commonly used today often have irregular shapes, making them difficult to manufacture, and their functions are limited, generally only preventing backflow of the medium. In daily production and life, many fields not only need to prevent backflow of the medium but also need to filter it. For example, in coal mines, dust control water needs to be filtered to remove silt and suspended solids to ensure that the water quality meets the requirements for dust control water in underground coal mines. As people's living conditions improve, their requirements for drinking water are also increasing. Summary of the Invention

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

[0005] The objective of this utility model can be achieved through the following technical solution: A check valve with a filtering function includes a valve body, a water passage for liquid flow is provided inside the valve body, a valve core for controlling the opening and closing of the water passage is provided inside the valve body, and a water outlet pipe for liquid outflow is provided on the valve body. The water outlet pipe is characterized by having a check element for preventing liquid backflow, a fixing part on the check element, and the fixing part having a concave structure. A water passage hole for water flow is provided on the side wall of the fixing part. A check structure is provided inside the fixing part, the check structure including a piston, a movable rod, and a connecting spring. The fixing part has a movable space for the piston to move back and forth. A mounting part is provided inside the check element and on the outer side relative to the fixing part, and a filter screen for impurity filtration is provided on the mounting part.

[0006] In the aforementioned check valve with a filtering function, one end of the movable rod is connected to the piston, and the other end of the movable rod extends out of the mounting part and is provided with a retaining ring. The connecting spring is sleeved on the movable rod and is located between the mounting part and the fixed part to allow the piston to return to its original position.

[0007] In the aforementioned check valve with a filtering function, the front end of the check element has an opening for liquid to flow in.

[0008] In the aforementioned check valve with a filtering function, the check element is provided with a retaining ring that is attached to the valve body.

[0009] Compared with the prior art, this check valve with filtering function has a check structure on the check element and a filter screen on the mounting part inside the check element, so that the check valve has a filtering function. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram, 1. Valve body; 2. Valve core; 3. Outlet pipe; 4. Check valve; 5. Fixing part; 6. Water passage hole; 7. Piston; 8. Moving rod; 9. Connecting spring; 10. Mounting part; 11. Filter screen; 12. Fixing ring. Detailed Implementation

[0012] 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.

[0013] like Figure 1 As shown, this check valve with filtration function includes a valve body 1, a water passage for liquid flow inside the valve body 1, a valve core 2 for controlling the opening and closing of the water passage inside the valve body 1, a water outlet pipe 3 for liquid outflow on the valve body 1, a check element 4 for preventing liquid backflow on the water outlet pipe 3, a fixing part 5 on the check element 4, and the fixing part 5 has a concave structure. A water passage hole 6 for water passage is opened on the side wall of the fixing part 5. A check structure is provided inside the fixing part 5. The check structure includes a piston 7, a movable rod 8 and a connecting spring 9. The fixing part 5 has a movable space for the piston 7 to move back and forth. A mounting part 10 is provided inside the check element 4 and on the outside of the fixing part 5. A filter screen 11 for filtering impurities is provided on the mounting part 10.

[0014] To elaborate further, one end of the movable rod 8 is connected to the piston component 7, and the other end of the movable rod 8 extends out of the mounting part 10 and is provided with a retaining ring. The connecting spring 9 is sleeved on the movable rod 8 and is located between the mounting part 10 and the fixed part 5 to allow the piston component 7 to return to its original position.

[0015] To elaborate further, when the valve is opened, liquid flows from the outlet pipe 3 into the movable space of the fixed part 5 on the check valve 4. The piston 7 is subjected to the pressure of the liquid, causing the piston 7 to move to the right. The connecting spring 9 is in a compressed state until the water passage hole 6 is in a flowing state. The liquid flows from the water passage hole 6 into the mounting part 10, is filtered by the filter screen 11 on the mounting part 10, and then flows out from the check valve 4. When the valve is closed, the piston 7 is no longer subjected to the pressure of the liquid, and the connecting spring 9 rebounds, thereby returning the piston 7 to the left and closing the water passage hole 6 to prevent liquid backflow.

[0016] To elaborate further, the front end of the check valve 4 has an opening for liquid to flow in.

[0017] To elaborate further, the check valve 4 is equipped with a retaining ring 12 that is attached to the valve body 1.

[0018] 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 replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document frequently uses terms such as valve body 1, valve core 2, outlet pipe 3, check valve 4, fixing part 5, water passage hole 6, piston 7, moving rod 8, connecting spring 9, mounting part 10, filter screen 11, and fixing ring 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 with a filtering function, comprising a valve body (1), wherein a water passage for liquid flow is provided inside the valve body (1), a valve core (2) for controlling the opening and closing of the water passage is provided inside the valve body (1), and a water outlet pipe (3) for liquid outflow is provided on the valve body (1), characterized in that, The water outlet pipe (3) is provided with a check valve (4) to prevent liquid backflow. The check valve (4) is provided with a fixing part (5), and the fixing part (5) is provided with a concave structure. A water passage hole (6) for water passage is provided on the side wall of the fixing part (5). A check valve structure is provided inside the fixing part (5). The check valve structure includes a piston (7), a movable rod (8), and a connecting spring (9). The fixing part (5) has a movable space for the piston (7) to move back and forth. An installation part (10) is provided inside the check valve (4) and on the outside of the fixing part (5). A filter screen (11) for impurity filtration is provided on the installation part (10).

2. A check valve with filtering function according to claim 1, characterized in that, One end of the movable rod (8) is connected to the piston (7), and the other end of the movable rod (8) extends out of the mounting part (10) and is provided with a stop ring. The connecting spring (9) is sleeved on the movable rod (8) and is located between the mounting part (10) and the fixed part (5) to allow the piston (7) to return to its original position.

3. A check valve with filtering function according to claim 1, characterized in that, The front end of the check valve (4) is provided with an opening for liquid to flow in.

4. A check valve with filtering function according to claim 1, characterized in that, The check valve (4) is provided with a retaining ring (12) that is attached to the valve body (1).

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