Check valve with cut-off function

Abstract

The utility model discloses a check valve with a cut-off function, relates to the technical field of check valves, solves the problems that an existing device is poor in check effect and low in practicability, and adopts the following scheme that a circulation column is fixedly installed on the inner wall of the center of a valve pipe. The valve plate A and the valve plate B automatically return to be closed under the gravity of the valve plate A and the valve plate B, the medium reversely flows to generate pressure on the valve plate B, the groove B and the circulation hole B enable the left side of the upper portion of the valve plate B to be smaller than the right side, the valve plate B is attached to a limiting block B under the action of water pressure, the check sealing performance and effect of the valve plate B are guaranteed, the valve plate A plays a role in check secondary insurance, the check effect is good, and the sealing effect is good. And meanwhile, through arrangement of a rotating rod A and a rotating rod B, a rotating disc A can drive the rotating rod A to rotate so as to close the valve plate A, a rotating disc B drives the rotating rod B to rotate so as to close the valve plate B, the functionality of the device is improved, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, concretely is check valve with cut off function. BACKGROUND

[0002] Check valve is the closing piece is round valve clack and acts by own weight and medium pressure to block the medium backflow valve, belongs to automatic valve, also called check valve, one way valve, backflow valve or isolation valve, lift check valve is similar in structure with stop valve, only lacks the valve stem of driving valve clack, medium flows into from the import end, and flows out from the export end, when the import pressure is greater than the sum of valve clack weight and its flow resistance, the valve is opened, contrarily, when the medium backflow, the valve is closed.

[0003] Through the retrieval, the application of patent announcement No. CN209688176U discloses a check valve with cutting function, including check valve body, support seat and mounting piece, the both ends of check valve body are symmetrically installed with fixed pipe, the fixed pipe on the right side of check valve body is connected with second extension pipe, the support seat is arranged below the second extension pipe and the first extension pipe, the upper end of the fixed seat is fixed with a stand, the mounting piece is welded and fixed on the front surface of the fixed seat, the inner side wall of the fixed seat is fixed with a side slide, so that the flow length of the fixed pipe can be adjusted, and the practicability is improved;

[0004] But because the setting of the cut-off plate, the rotation of the cut-off plate is driven by the pressure of water flow, the single-layer cut-off plate has poor check effect, and the cut-off plate is easy to rotate out of position, resulting in water flow backflow, and at the same time, it is inconvenient to cut off the flow of medium when the medium is flowing forward, so the function is low and the practicability is low.

[0005] Therefore, we propose a check valve with cutting function. CONTENT OF THE UTILITY MODEL

[0006] In view of the defects of the prior art, the utility model provides a check valve with cutting function, which solves the problems of poor check effect and low practicability of the prior device.

[0007] To achieve the above purpose, the utility model realizes the following technical scheme: a check valve with cutting function, comprising a valve pipe, an inlet and an outlet are respectively arranged on the bottom surface and the top surface of the valve pipe;

[0008] The inner wall of the valve pipe center is fixedly installed with a flow column with matching specifications, the inner wall of the valve pipe is rotatably connected with a valve plate A with matching specifications and located below the flow column, the top surface of the valve plate A is fixedly installed with a valve rod A with matching specifications, the valve rod A is connected with the inner wall of the valve pipe through a bearing, the left side of the bottom surface of the flow column is provided with a groove A, the top surface of the groove A is provided with a flow hole A, the right side of the top surface of the flow column is provided with a groove B, the bottom surface of the groove B is provided with a flow hole B, the inner wall of the flow hole B is provided with a flow groove in communication with the flow hole A, the inner wall of the valve pipe is rotatably connected with a valve plate B located above the flow column, and the top surface of the valve plate B is fixedly installed with a valve rod B connected with the inner wall of the valve pipe through a bearing.

[0009] The outer wall of the valve pipe is provided with a rotating rod A connected with the valve rod A, the front end of the rotating rod A is fixedly installed with a rotating disc A with matching specifications, the outer wall of the valve pipe is provided with a rotating rod B connected with the valve rod B, and the front end of the rotating rod B is fixedly installed with a rotating disc B with matching specifications.

[0010] Preferably, the inner wall of the valve pipe is fixedly installed with three groups of limiting blocks A located at the bottom surface of the valve plate A, and the limiting blocks A are located at the left side of the inner wall of the valve pipe, so that the valve plate A can be limited and can only be opened clockwise.

[0011] Preferably, the inner wall of the valve pipe is fixedly installed with three groups of limiting blocks B located at the bottom surface of the valve plate B, and the limiting blocks B are located at the right side of the inner wall of the valve pipe, so that the valve plate B can be limited and can only be opened counterclockwise.

[0012] Preferably, two groups of opposite reset springs A are fixedly installed between the valve plate A and the flow column, and the reset springs A are in a stretched state, so that when the forward medium flow is stopped, the reset springs A can automatically and quickly drive the valve plate A to reset and close, thereby improving the non-return rate.

[0013] Preferably, two groups of opposite reset springs B are fixedly installed between the valve plate B and the flow column, and the reset springs B are in a compressed state, so that when the forward medium flow is stopped, the reset springs B can automatically and quickly drive the valve plate B to reset and close, thereby improving the non-return rate.

[0014] Preferably, flanges are arranged on the upper and lower sides of the valve pipe, and flange holes are formed in the flanges, so that the valve pipe can be conveniently connected with other pipelines.

[0015] The check valve with the cutting function, through the setting of the flow column, the valve plate A and the valve plate B, when the positive medium flow is stopped, the valve plate A and the valve plate B are automatically restored to close under the self gravity, and the valve plate B is pressed by the medium reverse flow, and because the groove B and the flow hole B cause the left side of the valve plate B to be smaller than the right side, the valve plate B is attached to the limiting block B under the action of the water pressure, the sealing property and the effect of the valve plate B are ensured, the valve plate A serves as a secondary insurance of the check, and the check effect is good.

[0016] Meanwhile, through the setting of the rotating rod A and the rotating rod B, when the positive medium flow is being carried out, the valve plate A can be closed by rotating the rotating disc A to drive the rotating rod A to rotate, the valve plate B is closed by rotating the rotating disc B to drive the rotating rod B to rotate, the functionality and the cutting of the device are improved, and the practicality is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is a valve plate structure schematic view of the utility model;

[0019] Figure 3 It is a flow column structure schematic view of the utility model;

[0020] Figure 4 It is a reset spring structure schematic view of the utility model.

[0021] In the drawing: 1, valve pipe; 2, flow column; 3, flange; 4, valve plate A; 5, valve rod A; 6, limiting block A; 7, groove A; 8, flow hole A; 9, groove B; 10, flow hole B; 11, communication groove; 12, valve plate B; 13, valve rod B; 14, limiting block B; 15, rotating rod A; 16, rotating disc A; 17, rotating rod B; 18, rotating disc B; 19, reset spring A; 20, reset spring B; 21, flange hole. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. Embodiment 1

[0023] As Figures 1-4As shown: A flow column 2 of matching specifications is fixedly installed on the inner wall of the center of valve pipe 1. A valve plate A4 of matching specifications and located below the flow column 2 is rotatably connected to the inner wall of valve pipe 1. A valve stem A5 of matching specifications is fixedly installed on the top surface of valve plate A4. The valve stem A5 is connected to the inner wall of valve pipe 1 through a bearing. A groove A7 is opened on the left side of the bottom surface of the flow column 2. A flow hole A8 is opened on the top surface of the groove A7. A groove B9 is opened on the right side of the top surface of the flow column 2. A flow hole B10 is opened on the bottom surface of the groove B9. A flow groove 11 communicating with the flow hole A8 is opened on the inner wall of the flow hole B10. A valve plate A4 of matching specifications and located below the flow column 2 is rotatably connected to the inner wall of valve pipe 1. A valve plate B12 is located above the flow column 2. A valve stem B13 is fixedly installed on the top surface of the valve plate B12 and connected to the inner wall of the valve pipe 1 via a bearing. With the arrangement of the flow column 2, valve plate A4, and valve plate B12, when the forward flow of the medium stops, valve plate A4 and valve plate B12 automatically return to their closed state under their own gravity. The reverse flow of the medium first generates pressure on valve plate B12. Because of the groove B9 and the flow hole B10, the left side of the valve plate B12 is smaller than the right side. Under the action of water pressure, valve plate B12 fits against the limit block B14, ensuring the sealing and effectiveness of the valve plate B12 check valve. Valve plate A4 acts as a secondary safety device for check valve, and the check valve effect is good. Example 2

[0024] like Figures 2-4 As shown: A rotating rod A15 connected to valve stem A5 is mounted on the outer wall of valve pipe 1. A rotating disk A16 of the same specification is fixedly installed at the front end of the rotating rod A15. A rotating rod B17 connected to valve stem B13 is mounted on the outer wall of valve pipe 1. A rotating disk B18 of the same specification is fixedly installed at the front end of the rotating rod B17. With the setting of rotating rod A15 and rotating rod B17, when forward medium flow is in progress, the rotating rod A15 can be manually rotated by rotating disk A16 to close valve plate A4. The rotating disk B18 drives the rotating rod B17 to rotate to close valve plate B12, improving the functionality and cutoff of the device and making it highly practical. Example 3

[0025] like Figures 2-3 As shown: Two sets of return springs A19 with opposite positions are fixedly installed between valve plate A4 and flow column 2, and the return springs A19 are in a stretched state. In this way, when the forward medium flow stops, the return springs A19 can automatically and quickly drive valve plate A4 to reset and close, thereby improving the check rate.

[0026] The working principle and use process of the utility model: when the device needs to work, when the forward medium flow is stopped, valve plate A4 and valve plate B12 are automatically restored to close under the self gravity, the medium reverse flow first produces pressure on valve plate B12, and because the groove B9 and the flow hole B10 will cause the left side of valve plate B12 to be less than the right side above, valve plate B12 is attached with the limiting block B14 under the action of water pressure, guarantee the sealing property and effect of valve plate B12 check valve, valve plate A4 plays the secondary insurance of check valve, the check valve effect is good, at the same time, when the forward medium flow is being carried out, the valve plate A4 can be closed manually by rotating the disc A16 and driving the rotating rod A15 to rotate, thereby rotating the disc B18 and driving the rotating rod B17 to rotate, the valve plate B12 is closed, improve the functionality and the cutting of the device, and the practicability is high.

[0027] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A check valve with a cutting function, comprising a valve pipe (1), the bottom surface and the top surface of the valve pipe (1) are respectively provided with an inlet and an outlet; characterized in that A flow column (2) of appropriate size is fixedly installed on the inner wall of the center of the valve pipe (1), a valve plate A (4) of appropriate size and located below the flow column (2) is rotatably connected to the inner wall of the valve pipe (1), a valve rod A (5) of appropriate size is fixedly installed on the top surface of the valve plate A (4), the valve rod A (5) is connected to the inner wall of the valve pipe (1) through a bearing, a groove A (7) is formed on the left side of the bottom surface of the flow column (2), a flow hole A (8) is formed on the top surface of the groove A (7), a groove B (9) is formed on the right side of the top surface of the flow column (2), a flow hole B (10) is formed on the bottom surface of the groove B (9), a flow groove (11) in communication with the flow hole A (8) is formed on the inner wall of the flow hole B (10), a valve plate B (12) located above the flow column (2) is rotatably connected to the inner wall of the valve pipe (1), a valve rod B (13) connected to the inner wall of the valve pipe (1) through a bearing is fixedly installed on the top surface of the valve plate B (12); A rotating rod A (15) connected to the valve rod A (5) is assembled on the outer wall of the valve pipe (1), a rotating disc A (16) of appropriate size is fixedly installed on the front end of the rotating rod A (15), a rotating rod B (17) connected to the valve rod B (13) is assembled on the outer wall of the valve pipe (1), a rotating disc B (18) of appropriate size is fixedly installed on the front end of the rotating rod B (17).

2. The check valve with a cut-off function according to claim 1, characterized in that: Three sets of limiting blocks A (6) located on the bottom surface of the valve plate A (4) are fixedly installed on the inner wall of the valve pipe (1), the limiting blocks A (6) are located on the left side of the inner wall of the valve pipe (1).

3. The check valve with a cut-off function according to claim 1, characterized in that: Three sets of limiting blocks B (14) located on the bottom surface of the valve plate B (12) are fixedly installed on the inner wall of the valve pipe (1), the limiting blocks B (14) are located on the right side of the inner wall of the valve pipe (1).

4. The check valve with a cut-off function according to claim 1, characterized in that: Two sets of reset springs A (19) in opposite positions are fixedly installed between the valve plate A (4) and the flow column (2), and the reset springs A (19) are in a stretched state.

5. The check valve with a cut-off function according to claim 1, characterized by: Two sets of reset springs B (20) in opposite positions are fixedly installed between the valve plate B (12) and the flow column (2), and the reset springs B (20) are in a compressed state.

6. The check valve with a cut-off function according to claim 1, characterized by: Flanges (3) are assembled on the upper and lower sides of the valve pipe (1), flange holes (21) are formed on the flanges (3).

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