Dual seat anti-mixing valve

Abstract

The utility model belongs to valve technical field especially is a kind of double seat anti-mixing valve, including double mixing valve valve body and cylinder, detachably installed with the sealing gland of being convenient for opening or sealing cylinder in the bottom of cylinder, sealing gland bottom is connected with double mixing valve support by bolt, double mixing valve support lower end is installed on double mixing valve valve body, and first flow passage and second flow passage are connected on upper and lower valve body, and upper and lower valve body are respectively equipped with upper valve disc and lower valve disc;Lower valve rod is connected with the nesting connection of upper valve rod lower end on lower valve disc, and passage is equipped in lower valve rod inside with the intercommunication of connecting pipe, and cleaning pipeline is installed in upper valve rod with the intercommunication of passage, and blow-off pipe is equipped in lower valve rod inside with the intercommunication of connecting pipe.The utility model is favorable to mixing and material reversing flow, when sealing washer leaks, material in flow passage will not be mutually contaminated;By cleaning pipeline, passage and blow-off pipe cooperation to clean and discharge inside, prevent material residue;It is convenient to clean inside valve body.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a double-seat anti-mixing valve. Background Technology

[0002] An anti-mixing valve is a valve that prevents fluid materials from mixing with each other. However, existing anti-mixing valves have the following drawbacks: they are not conducive to mixing and matching, and they are not conducive to changing the flow direction of fluid materials. When there are many types of fluid materials and automatic mixing and switching are required, the on-site piping is cumbersome. When the gasket leaks, the fluid materials in the pipeline will contaminate each other, which is not conducive to cleaning the pipeline and gasket, and leaves the previous fluid materials behind.

[0003] In addition, the cylinder part of most existing dual-seat anti-mixing valves is not removable. When internal parts malfunction and need to be replaced, the entire cylinder part must be replaced, which is too costly.

[0004] Therefore, it is necessary to design a double-seat anti-mixing valve that is efficient in discharging sewage and has a leak-proof seal. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a double-seat anti-mixing valve that prevents cross-contamination of materials in the flow channel when the sealing gasket leaks. It also facilitates internal cleaning and drainage through a combination of cleaning pipes, channels, and drain pipes, preventing material residue and allowing for easy cleaning of the valve body's interior.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-seat anti-mixing valve, comprising a double-mixing valve body and a cylinder, wherein a sealing cap is detachably installed at the bottom of the cylinder for easy opening or sealing of the cylinder, and a double-mixing valve bracket is bolted to the bottom of the sealing cap, the lower end of the double-mixing valve bracket is mounted on the double-mixing valve body, a main connecting rod is provided inside the cylinder, the lower end of the main connecting rod passes through the cylinder and is bolted to an upper valve rod provided inside the double-mixing valve bracket, the double-mixing valve body adopts a double valve body design with the upper and lower valve bodies connected by a connecting pipe, a first flow channel and a second flow channel are connected to the upper and lower valve bodies, and an upper valve disc and a lower valve disc are respectively provided in the upper and lower valve bodies; the lower end of the upper valve rod passes through the double-mixing valve body and is connected to the upper valve disc, and a lower valve rod is connected to the lower valve disc and nested with the lower end of the upper valve rod, the lower valve rod has a channel communicating with the connecting pipe inside, a cleaning pipe communicating with the channel is installed on the upper valve rod, and a drain pipe communicating with the connecting pipe is provided inside the lower valve rod.

[0007] Furthermore, a sealing gasket is provided on the outer edge of the bottom end of the upper valve disc, and a sealing gasket is provided on the outer edge of the top end of the lower valve disc. The bottom end of the upper valve disc, the top end of the lower valve disc, and the inner wall of the connecting pipe form a leakage cavity. The outer edge of the sealing gasket is in close contact with the inner wall of the top end of the connecting pipe, and the outer edge of the sealing gasket is in close contact with the inner wall of the connecting pipe, which helps to block and isolate the first flow channel and the second flow channel.

[0008] Furthermore, a main piston and a secondary piston are respectively installed in the middle and lower end of the main connecting rod inside the cylinder. A compression spring connected to the main piston is sleeved on the outside of the main connecting rod in the cylinder cavity. A compression secondary spring is connected between the main piston and the secondary piston. O-rings are provided between the main piston and the secondary piston and the inner wall of the cylinder to prevent gas leakage. The cylinder is provided with an air inlet and an air outlet that communicate with the inner cavity of the cylinder. A control connection connector is connected to the top of the cylinder.

[0009] Furthermore, the cleaning pipeline is fixedly connected to the body of the dual mixing valve via a flange, which facilitates the installation and disassembly of the cleaning pipeline.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1) This utility model uses the upper and lower valve stems to simultaneously lift the upper and lower valve discs, facilitating the mixing and reversal of flowing materials; when the sealing gasket leaks, the flowing material in the flow channel flows out through the leakage chamber in the middle of the valve stem to the drain pipe, preventing cross-contamination of the flowing materials in the flow channel; then, the flow channel, channel, and sealing gasket are cleaned and discharged through the cleaning pipe, channel, and drain pipe, preventing the previous flowing material from remaining; facilitating the cleaning of the inside of the valve body.

[0012] 2) The cylinder is sealed with a detachable individual sealing cover. The internal parts of the cylinder can be replaced individually by opening the sealing cover, which reduces a lot of labor and time costs and makes the work more convenient and faster. Attached Figure Description

[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings;

[0014] Figure 1 This is a half-sectional view of the overall longitudinal section of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0016] Explanation of icon numbers:

[0017] 1. Dual-mixing valve body; 11. Flange; 12. Upper valve disc; 13. Lower valve disc; 14. Leakage chamber; 15. Lower valve stem; 16. Sealing gasket one; 17. Sealing gasket two; 18. Connecting pipe; 19. Drain pipe; 2. Cylinder; 21. Main connecting rod; 22. Compression main spring; 23. Compression secondary spring; 24. Main piston; 25. Secondary piston; 26. Air inlet; 27. Air outlet; 3. Dual-mixing valve bracket; 4. First flow channel; 5. Second flow channel; 6. Sealing gland; 7. Upper valve stem; 8. Cleaning pipe; 9. Channel. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1-2 This utility model provides the following technical solution: a double-seat anti-mixing valve, comprising a double-mixing valve body 1 and a cylinder 2. A sealing cap 6 is detachably installed at the bottom of the cylinder 2 for easy opening or sealing. A double-mixing valve bracket 3 is bolted to the bottom of the sealing cap 6. The lower end of the double-mixing valve bracket 3 is mounted on the double-mixing valve body 1. A main connecting rod 21 is provided inside the cylinder 2. The lower end of the main connecting rod 21 passes through the cylinder 2 and is bolted to an upper valve rod 7 located inside the double-mixing valve bracket 3. The double-mixing valve body 1 is connected vertically by connecting pipes 18. The valve body is designed with two valve bodies. The upper and lower valve bodies of the dual mixing valve 1 are connected by a first flow channel 4 and a second flow channel 5. The upper and lower valve bodies are respectively provided with an upper valve disc 12 and a lower valve disc 13. The lower end of the upper valve rod 7 passes into the valve body 1 and is connected to the upper valve disc 12. The lower valve disc 13 is connected to a lower valve rod 15 that is nested with the lower end of the upper valve rod 7. The lower valve rod 15 has a channel 9 inside that is connected to the connecting pipe 18. A cleaning pipe 8 connected to the channel 9 is installed on the upper valve rod 7. The lower valve rod 15 has a drain pipe 19 inside that is connected to the connecting pipe 18.

[0020] Specifically, a sealing gasket 16 is provided on the outer edge of the bottom end of the upper valve disc 12, and a sealing gasket 17 is provided on the outer edge of the top end of the lower valve disc 13. The bottom end of the upper valve disc 12, the top end of the lower valve disc 13, and the inner wall of the connecting pipe 18 form a leakage cavity 14. The outer edge of the sealing gasket 16 is in close contact with the inner wall of the top end of the connecting pipe 18, and the outer edge of the sealing gasket 17 is in close contact with the inner wall of the connecting pipe 18, which is beneficial to block and isolate the first flow channel 4 and the second flow channel 5.

[0021] Specifically, inside the cylinder 2, a main piston 24 and a secondary piston 25 are respectively installed in the middle and lower ends of the main connecting rod 21. A compression main spring 22 connected to the main piston 24 is sleeved on the outside of the main connecting rod 21 in the cylinder 2 cavity. A compression secondary spring 23 is connected between the main piston 24 and the secondary piston 25. O-rings are provided between the main piston 24 and the secondary piston 25 and the inner wall of the cylinder 2 to prevent gas leakage. The cylinder 2 is provided with an air inlet 26 and an air outlet 27 that communicate with the inner cavity of the cylinder. A control connection connector 10 is connected to the top of the cylinder 2. When compressed air is injected into the cylinder 2 by an external air pump, the main piston 24 and the secondary piston 25 in the cylinder move upward, driving the main connecting rod 21 to move upward, thereby driving the upper valve rod 7 and the lower valve rod 15 to lift upward, separating the upper valve disc 12 and the lower valve disc 13 from the connecting pipe 18, realizing the connection between the first flow channel 4 and the second flow channel 5.

[0022] Specifically, the cleaning pipe 8 is fixedly connected to the dual mixing valve body 1 via flange 11, which facilitates the installation and disassembly of the cleaning pipe 8.

[0023] The working principle and usage process of this utility model are as follows: When in use, the air inlet 26 on the cylinder 2 is used to connect with an external air pump for gas transmission. When compressed air is injected into the cylinder body of the cylinder 2 by the external air pump, the main piston 24 and the auxiliary piston 25 in the cylinder body move upward, driving the main connecting rod 21 to move upward, thereby driving the upper valve rod 7 and the lower valve rod 15 to lift upward, separating the upper valve disc 12 and the lower valve disc 13 from the connecting pipe 18, realizing the connection between the first flow channel 4 and the second flow channel 5. The connection and disconnection of different flow channels are realized by the cylinder 2 driving the upper valve rod 7 to move up and down. In this application, the main structure of the double-seat anti-mixing valve and its connection principle are existing technologies, which are only briefly introduced and not limited in detail here.

[0024] In practical application, when the material flowing in the first channel 4 needs to be mixed with the material flowing in the second channel 5, the other end of the first channel 4 is blocked, and the upper valve stem 7 and the lower valve stem 15 are raised simultaneously. The materials flowing in the first channel 4 and the second channel 5 are connected through the connecting pipe 18 for mixing. When the material flowing in the first channel 4 needs to pass through the second channel 5, one end of the first channel 4 and the second channel 5 is closed, and the upper valve stem 7 and the lower valve stem 15 are raised simultaneously. The material flowing in the first channel 4 flows to the second channel 5, thus reversing the flow direction of the materials. (The last sentence appears to be incomplete and possibly refers to a specific application or application.) When leakage occurs, the flowing material in the first flow channel 4 and the second flow channel 5 flows out through the leakage cavity 14 between the upper valve stem 7 and the lower valve stem 15 to the drain pipe 19, preventing the flowing material in the first flow channel 4 and the second flow channel 5 from contaminating each other. When the flowing material in the first flow channel 4 needs to be replaced, the upper valve stem 7 moves upward, and the cleaning fluid in the first flow channel 4 and the cleaning pipe 8 will clean the sealing gasket 16 on the first flow channel 4 and the upper valve stem 7, and discharge it through the first flow channel 4 and the drain pipe 19, preventing the previous flowing material from remaining; this facilitates cleaning the inside of the valve body.

[0025] As a preferred embodiment, in the specific implementation of this application, a sealing cover 6 is detachably installed at the bottom of the cylinder 2 to facilitate opening or sealing the cylinder; the cylinder 2 is sealed by a separate sealing cover 6, and when the internal parts of the cylinder 2 are worn and need to be replaced, the sealing cover 6 can be opened to replace the internal parts of the cylinder 2 separately, which reduces a lot of labor and time costs, and the double-seat anti-mixing valve can be internally cleaned, making the work more convenient and faster.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A double-seat anti-mixing valve, comprising a double-mixing valve body (1) and a cylinder (2), characterized in that: The cylinder (2) is detachably fitted with a sealing cap (6) for easy opening or sealing. The bottom of the sealing cap (6) is bolted to a double-mixing valve bracket (3). The lower end of the double-mixing valve bracket (3) is mounted on the double-mixing valve body (1). The cylinder (2) is equipped with a main connecting rod (21). The lower end of the main connecting rod (21) passes through the cylinder (2) and is bolted to the upper valve rod (7) located inside the double-mixing valve bracket (3). The double-mixing valve body (1) adopts a double valve body design with the upper and lower valve bodies connected by a connecting pipe (18). The upper and lower valve bodies of the double-mixing valve body (1) are connected to a first valve body. The upper valve plate (12) and the lower valve plate (13) are respectively provided in the upper and lower valve bodies of the flow channel (4) and the second flow channel (5); the lower end of the upper valve rod (7) is inserted into the valve body (1) of the double mixing valve and connected to the upper valve plate (12); the lower valve plate (13) is connected to the lower valve rod (15) which is nested and connected to the lower end of the upper valve rod (7); the lower valve rod (15) is provided with a channel (9) connected to the connecting pipe (18); the upper valve rod (7) is installed with a cleaning pipe (8) connected to the channel (9); the lower valve rod (15) is provided with a drain pipe (19) connected to the connecting pipe (18).

2. The dual-seat anti-mixing valve as described in claim 1, characterized in that: A sealing gasket 1 (16) is provided on the outer edge of the bottom end of the upper valve disc (12), and a sealing gasket 2 (17) is provided on the outer edge of the top end of the lower valve disc (13). The bottom end of the upper valve disc (12), the top end of the lower valve disc (13), and the inner wall of the connecting pipe (18) form a leakage cavity (14). The outer edge of the sealing gasket 1 (16) is in close contact with the inner wall of the top end of the connecting pipe (18), and the outer edge of the sealing gasket 2 (17) is in close contact with the inner wall of the connecting pipe (18), which is conducive to blocking and isolating the first flow channel (4) and the second flow channel (5).

3. The dual-seat anti-mixing valve as described in claim 1, characterized in that: The cylinder (2) has a main piston (24) and a secondary piston (25) installed in the middle and lower part of the main connecting rod (21) respectively. The cylinder (2) has a compression main spring (22) connected to the main piston (24) sleeved on the outside of the main connecting rod (21). A compression secondary spring (23) is connected between the main piston (24) and the secondary piston (25). O-rings are provided between the main piston (24) and the secondary piston (25) and the inner wall of the cylinder (2). The cylinder (2) has an air inlet (26) and an air outlet (27) that are connected to the inner cavity of the cylinder. A control connection connector (10) is connected to the top of the cylinder (2).

4. The dual-seat anti-mixing valve as described in claim 1, characterized in that: The cleaning pipe (8) is fixedly connected to the body (1) of the double mixing valve via a flange (11), which facilitates the installation and disassembly of the cleaning pipe (8).

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