Bidirectional check valve

Abstract

The utility model provides a two-way check valve, and belongs to the technical field of valves. The check valve solves the problem that an existing check valve is prone to being damaged due to the fact that impact force borne in the check valve is large. The two-way check valve comprises valve bodies, two water inlet pipelines are arranged on the valve bodies, water outlet pipelines are arranged at the upper ends and the lower ends of the valve bodies, valve switches are arranged on the two valve bodies respectively, and two check pieces are arranged at the positions of the two water outlet pipelines respectively. A filtering piece used for filtering liquid in the two pipelines is arranged between the two water outlet pipelines, the non-return piece comprises a fixing base, a non-return part, a connecting base and a reset spring, the non-return part is arranged in the fixing base, the connecting base is fixedly arranged on the fixing base, the reset spring is arranged between the non-return part and the connecting base, a through hole used for water passing is formed in the fixing base, and the non-return part is arranged in the through hole. The side end of the non-return part is provided with a water passing hole used for water passing.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a check valve, in particular to a two-way check valve. Background Art

[0002] With the continuous development of my country's economy, the speed of industrial development is getting faster and faster, and the industry is gradually becoming centralized. Valve is an important part in life and production manufacturing process. Check valve is a kind of valve, which refers to a valve with a circular valve disc as the opening and closing part and relies on its own weight and medium pressure to produce action to block the backflow of medium. However, the existing check valve has some shortcomings in the use process.

[0003] The existing check valve has a single usage mode and can only be opened and closed. When the flow pressure of the liquid passing through the check valve increases, the impact force on the check valve is large, which is easy to cause damage, shortening its actual use and failing to meet usage requirements. Summary of the invention

[0004] The utility model aims to provide a two-way check valve with reasonable design and simple structure in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a two-way check valve, including a valve body, characterized in that two water inlet pipes for water inlet are provided on the valve body, water outlet pipes for water outlet are provided at the upper and lower ends of the valve body, valve switches for controlling the internal flow of the water inlet pipes are respectively provided on the two valve bodies and at positions relative to the water inlet pipes, two check pieces for checking are respectively provided at the positions of the two water outlet pipes, a filter piece for filtering liquids in the two pipes is provided between the two water outlet pipes, the check piece includes a fixed seat, a check portion, a connecting seat and a reset spring, the check portion is arranged in the fixed seat, the connecting seat is fixedly arranged on the fixed seat, the reset spring is arranged between the check portion and the connecting seat, a through hole for water passing is provided on the fixed seat, and a water through hole for water passing is provided at the side end of the check portion.

[0006] In the above-mentioned two-way check valve, abutment parts are arranged at the upper and lower ends of the filter element, the abutment part and the filter element are integrally formed, and a plurality of filter holes for filtering are arranged on the abutment part.

[0007] In the above-mentioned two-way check valve, the upper end of the filter element is used to filter one of the water inlet pipes, and the lower end of the filter element is used to filter the other water inlet pipe.

[0008] In the above-mentioned two-way check valve, the diameter of the front end of the check member is larger than the diameter of the through hole on the fixing seat.

[0009] In the above-mentioned two-way check valve, a sealing ring is arranged between the filter element and the inner wall of the valve body, a sealing ring is arranged between the fixing seat and the valve body, and a sealing ring is arranged between the connecting seat and the fixing seat.

[0010] Compared with the prior art, the two-way check valve has the following advantages:

[0011] 1. After the liquid flows into the valve body, it can flow out from two different directions, which is convenient for the staff to operate.

[0012] 2. Check pieces are provided at the positions of the upper and lower water outlet pipes of the valve body, which reduces the problem of only one check piece being provided on the valve body, avoids the problem of damage to the check piece caused by excessive pressure on the check piece, and improves the check effect of the utility model.

[0013] 3. A filter is arranged inside the valve body, which can filter the liquids in two pipes at the same time, so that the utility model has a filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] In the figure, 1. valve body; 2. water inlet pipe; 3. water outlet pipe; 4. valve switch; 5. check piece; 6. filter element; 7. fixing seat; 8. check part; 9. connecting seat; 10. reset spring; 11. through hole; 12. water hole; 13. abutment part; 14. filter hole; 15. sealing ring. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figure 1 , Figure 2As shown, the two-way check valve comprises a valve body 1, on which two water inlet pipes 2 for water inlet are provided, and the pipes connected to the water inlet pipes 2 can be used for diverting the same liquid or for two different liquids to flow in separately, and outlet pipes 3 for water outlet are provided at the upper and lower ends of the valve body 1, and valve switches 4 for controlling the internal flow of the water inlet pipes 2 are respectively provided on the two valve bodies 1 and at positions relative to the water inlet pipes 2, and two check members 5 for check are respectively provided at the positions of the two water outlet pipes 3, and a filter member 6 for filtering the liquids in the two pipes is provided between the two water outlet pipes 3, and the check member 5 comprises a fixed seat 7, a check portion 8, a connecting seat 9 and a reset spring 10, the check portion 8 is provided in the fixed seat 7, the connecting seat 9 is fixedly provided on the fixed seat 7, and the reset spring 10 is provided between the check portion 8 and the connecting seat 9, and a through hole 11 for water flow is provided on the fixed seat 7, and a water flow hole 12 for water flow is provided at the side end of the check portion 8.

[0019] To elaborate further, when the two water inlet pipes 2 are in an open state, the liquid flows into the interior of the valve body 1 from the two water inlet pipes 2 (the external pipes can be a single one that enters the valve body at the same time or two that enter the valve body separately), and then the liquid is filtered by the filter elements 6 at the upper and lower ends of the valve body 1, and finally flows out from the water outlet pipes 3 at the upper and lower ends respectively.

[0020] To explain in further detail, when the valve is in a flowing state, the liquid applies pressure to the check piece 5 from the through hole 11, causing it to move toward the connecting seat 9, and the reset spring 10 is in a compressed state. The liquid flows from the through hole 11 to the water hole 12 of the check piece 5 and then flows out from the connecting seat 9. When the valve is in a closed state, the check piece 5 loses the pressure of the liquid, the reset spring 10 rebounds, and the check piece 5 is again against the fixed seat 7, closing the through hole 11 to prevent the liquid at the water outlet from flowing back to the water inlet pipe 2.

[0021] To elaborate further, the filter element 6 is provided with abutment parts 13 at both upper and lower ends, which also have a buffering effect on the passing liquid during use. The abutment part 13 and the filter element 6 are integrally formed, and a plurality of filter holes 14 for filtering are opened on the abutment part 13.

[0022] To further elaborate, the upper end of the filter element 6 is used to filter one of the water inlet pipes 2 , and the lower end of the filter element 6 is used to filter the other water inlet pipe 2 .

[0023] To be more specific, the diameter of the front end of the check member 5 is greater than the diameter of the through hole 11 on the fixing seat 7 .

[0024] To be more specific, a sealing ring 15 is provided between the filter element 6 and the inner wall of the valve body 1 , a sealing ring 15 is provided between the fixing seat 7 and the valve body 1 , and a sealing ring 15 is provided between the connecting seat 9 and the fixing seat 7 .

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although the terms such as valve body 1, water inlet pipe 2, water outlet pipe 3, valve switch 4, check member 5, filter member 6, fixing seat 7, check portion 8, connecting seat 9, reset spring 10, through hole 11, water hole 12, abutment portion 13, filter hole 14, sealing ring 15 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A two-way check valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with two water inlet pipes (2) for water inlet, and the upper and lower ends of the valve body (1) are provided with water outlet pipes (3) for water outlet. A valve switch (4) for controlling the internal flow of the water inlet pipes (2) is respectively provided on the two valve bodies (1) at positions relative to the water inlet pipes (2), and two check members (5) for checking the flow of liquid in the two pipes are respectively provided at positions of the two water outlet pipes (3). A valve for checking the flow of liquid in the two pipes is provided between the two water outlet pipes (3). A filter element (6) for filtering, the non-return element (5) comprising a fixed seat (7), a non-return portion (8), a connecting seat (9) and a return spring (10), the non-return portion (8) being arranged in the fixed seat (7), the connecting seat (9) being fixedly arranged on the fixed seat (7), the return spring (10) being arranged between the non-return portion (8) and the connecting seat (9), the fixed seat (7) being provided with a through hole (11) for passing water, and the side end of the non-return portion (8) being provided with a water through hole (12) for passing water.

2. A two-way check valve according to claim 1, characterized in that: The filter element (6) is provided with abutment portions (13) at the upper and lower ends thereof; the abutment portion (13) and the filter element (6) are integrally formed; and the abutment portion (13) is provided with a plurality of filter holes (14) for filtering.

3. A two-way check valve according to claim 1, characterized in that: The upper end of the filter element (6) is used to filter one of the water inlet pipes (2), and the lower end of the filter element (6) is used to filter the other water inlet pipe (2).

4. A two-way check valve according to claim 1, characterized in that: The diameter of the front end of the return stop (5) is greater than the diameter of the through hole (11) on the fixing seat (7).

5. A two-way check valve according to claim 1, characterized in that: A sealing ring (15) is provided between the filter element (6) and the inner wall of the valve body (1), a sealing ring (15) is provided between the fixing seat (7) and the valve body (1), and a sealing ring (15) is provided between the connecting seat (9) and the fixing seat (7).

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