Micro-pressure anti-siphon valve

Abstract

The utility model relates to the technical field of valves, in particular to a micro-pressure anti-siphon valve which comprises a liquid conveying pipe, a first sleeve shell and a second sleeve shell, a mounting plate is fixedly connected to the outer side of the liquid conveying pipe, a plurality of supporting shafts distributed in the circumferential direction are fixedly connected to the right side of the mounting plate, and limiting plates are fixedly connected to the right sides of the supporting shafts. Through the supporting shaft, the positioning plate, the first blocking layer, the second blocking layer, the supporting ring and the sealing ring, the right end of the infusion tube can be sealed through the first blocking layer, the second blocking layer, the supporting ring and the sealing ring, and the first blocking layer and the second blocking layer are prevented from being sucked into the infusion tube through the positioning plate; the positioning plate can be limited through the supporting shaft, the first blocking layer and the second blocking layer are prevented from being dislocated, and the device has good anti-siphon performance, can adapt to reverse pressure of liquid in the using process, guarantees that the first blocking layer and the second blocking layer are not dislocated, and prevents liquid backflow.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a micro-pressure anti-siphon valve. Background Technology

[0002] A check valve is a valve that automatically opens and closes its disc based on the flow of the medium itself, used to prevent backflow of the medium. It is an automatic valve that can prevent backflow of the medium, prevent pump and drive motor from reversing, and prevent the release of medium from containers. Check valves also have a certain anti-siphon performance.

[0003] Some existing check valves have a check diaphragm installed in the outlet pipe and a spring is used to hold the check diaphragm in place so that it blocks the outlet pipe when there is no liquid flowing in the forward direction. However, the anti-siphon performance of some existing check valves is insufficient. During use, the liquid in the outlet pipe often generates reverse pressure due to the siphon effect. When the pressure difference is large, the check diaphragm will dislodge, causing the liquid to flow back. Therefore, a micro-pressure anti-siphon valve is proposed to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a micro-pressure anti-siphon valve to solve the problem that some existing check valves have insufficient anti-siphon performance. During use, the liquid in the outlet pipe often generates reverse pressure due to the siphon effect. When the pressure difference is large, the check diaphragm will dislodge, causing the liquid to flow back.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A micro-pressure anti-siphon valve includes an infusion tube, a first housing, and a second housing. A mounting plate is fixedly connected to the outer side of the infusion tube. Multiple circumferentially distributed support shafts are fixedly connected to the right side of the mounting plate. A limit plate is fixedly connected to the right side of each support shaft. A first damping layer is fixedly connected to the outer side of each support shaft. Multiple compression springs are fixedly connected to the left side of the limit plate. A positioning plate is fixedly connected to the left side of each compression spring. A second damping layer is fixedly connected to the limiting groove of each positioning plate, and the second damping layer is slidably connected to the first damping layer. A first barrier layer is fixedly connected to the left side of the positioning plate. A second barrier layer is fixedly connected to the inner side of the partition. A support ring is fixedly connected to the left side of the first barrier layer. A sealing ring is fixedly connected to the outer side of the support ring. A connecting flange is fixedly connected to the outer side of the infusion tube. A first housing is provided on the upper side of the mounting plate. A second housing is provided on the lower side of the mounting plate. A drain pipe is fixedly connected to the lower side of the second housing. First fixing plates are fixedly connected to the front and rear sides of both the first and second housings. Every two vertically aligned first fixing plates are bolted together. A second fixing plate is fixedly connected to the left side of both the first and second housings. The second fixing plates are bolted to the connecting flange.

[0007] Preferably, the right end of the infusion tube is attached to the first barrier layer, the support ring and the sealing ring are both located inside the infusion tube, the outer side of the sealing ring is attached to the inner wall of the infusion tube, and the connecting flanges are all located on the left side of the mounting plate.

[0008] Preferably, the mounting plate and the positioning plate are both annular metal plates, the limiting plate is a circular metal plate, the inner diameter of the positioning plate is smaller than the inner diameter of the infusion tube, and the outer diameter of the first barrier layer is equal to the outer diameter of the infusion tube.

[0009] Preferably, the outer side of the positioning plate is provided with a plurality of circumferentially distributed limiting grooves, the number of limiting grooves of the positioning plate is the same as the number of supporting shafts, and the first damping layer and the second damping layer are both semi-circular annular sleeves.

[0010] Preferably, the first barrier layer is an annular rubber sheet, the second barrier layer is a rubber protrusion layer, the support ring is a metal ring, and the sealing ring is a rubber ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the device, through the arrangement of a support shaft, a positioning plate, a first barrier layer, a second barrier layer, a support ring, and a sealing ring, can seal the right end of the infusion tube. The positioning plate prevents the first and second barrier layers from being sucked into the infusion tube, and the support shaft limits the positioning plate to prevent the first and second barrier layers from dislodging. This device has good anti-siphon performance and can adapt to the reverse pressure of the liquid during use, ensuring that the first and second barrier layers do not dislodge and preventing liquid backflow. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the mounting plate installation structure of this utility model;

[0015] Figure 3 This is a cross-sectional view of the drainage pipe installation structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the installation structure of the limiting plate of this utility model;

[0017] Figure 5 This is a cross-sectional view of the positioning plate installation structure of this utility model;

[0018] Figure 6 This is a cross-sectional view of the support ring installation structure of this utility model.

[0019] In the diagram: 1. Infusion tube; 2. Mounting plate; 3. Support shaft; 4. Limiting plate; 5. First damping layer; 6. Compression spring; 7. Positioning plate; 8. Second damping layer; 9. First barrier layer; 10. Second barrier layer; 11. Support ring; 12. Sealing ring; 13. Connecting flange; 14. First housing; 15. Second housing; 16. Drain tube; 17. First fixing plate; 18. Second fixing plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] Please see Figure 1-6 This utility model provides a technical solution:

[0024] A micro-pressure anti-siphon valve includes an infusion tube 1, a first housing 14, and a second housing 15. A mounting plate 2 is fixedly connected to the outer side of the infusion tube 1. Multiple circumferentially distributed support shafts 3 are fixedly connected to the right side of the mounting plate 2. A limit plate 4 is fixedly connected to the right side of each support shaft 3. A first damping layer 5 is fixedly connected to the outer side of each support shaft 3. Multiple compression springs 6 are fixedly connected to the left side of the limit plate 4. A positioning plate 7 is fixedly connected to the left side of each compression spring 6. A second damping layer 8 is fixedly connected to the limiting groove of each positioning plate 7. The second damping layer 8 is slidably connected to the first damping layer 5. A first barrier layer 9 is fixedly connected to the left side of the positioning plate 7. The inner side of the first barrier layer 9 is fixedly connected to... There is a second barrier layer 10. A support ring 11 is fixedly connected to the left side of the first barrier layer 9. A sealing ring 12 is fixedly connected to the outside of the support ring 11. A connecting flange 13 is fixedly connected to the outside of the infusion tube 1. A first housing 14 is provided on the upper side of the mounting plate 2. A second housing 15 is provided on the lower side of the mounting plate 2. A drain pipe 16 is fixedly connected to the lower side of the second housing 15. First fixing plates 17 are fixedly connected to the front and rear sides of the first housing 14 and the second housing 15. Every two first fixing plates 17 aligned vertically are bolted together. A second fixing plate 18 is fixedly connected to the left side of the first housing 14 and the second housing 15. The second fixing plate 18 is bolted to the connecting flange 13.

[0025] The right end of the infusion tube 1 is attached to the first barrier layer 9. The support ring 11 and the sealing ring 12 are both located inside the infusion tube 1. The outer side of the sealing ring 12 is attached to the inner wall of the infusion tube 1. The connecting flanges 13 are all located on the left side of the mounting plate 2. The first housing 14 and the second housing 15 can be fixed through the connecting flanges 13. The mounting plate 2 and the positioning plate 7 are both annular metal plates, and the limiting plate 4 is a circular metal plate. The inner diameter of the positioning plate 7 is smaller than the inner diameter of the infusion tube 1, and the outer diameter of the first barrier layer 9 is equal to the outer diameter of the infusion tube 1. The infusion tube can be fixed through the first barrier layer 9, the second barrier layer 10, the support ring 11, and the sealing ring 12. The right end of 1 is sealed; the outer side of the positioning plate 7 is provided with multiple circumferentially distributed limiting grooves, the number of limiting grooves of the positioning plate 7 is the same as the number of support shafts 3, the first damping layer 5 and the second damping layer 8 are both semi-circular annular sleeves, the damping of the first damping layer 5 and the second damping layer 8 can buffer the positioning plate 7 during left and right movement; the first barrier layer 9 is an annular rubber plate, the second barrier layer 10 is a rubber protrusion layer, the support ring 11 is a metal ring, and the sealing ring 12 is a rubber ring, the support ring 11 and the sealing ring 12 can improve the sealing effect of the first barrier layer 9 and the second barrier layer 10 on the infusion tube 1.

[0026] Working process: Before use, connect the left end of the infusion tube 1 of the device to the infusion line. The first housing 14 and the second housing 15 of the device are detachable parts, all of which are existing technologies. When there is no liquid flowing in the device, the compression spring 6 is in a slightly compressed state, the first barrier layer 9 is attached to the right end of the infusion tube 1, the second barrier layer 10 protrudes to the right, the support ring 11 and the sealing ring 12 are both located inside the infusion tube 1, and the outer side of the sealing ring 12 is attached to the inner wall of the infusion tube 1. When there is liquid in the device and the water pressure is high enough, the water pressure can push the first barrier layer 9 and the second barrier layer 10 to the right, causing the pressure to rise. The compression spring 6 is further compressed, causing the first barrier layer 9 to no longer contact the right end of the infusion tube 1, and the support ring 11 and sealing ring 12 to move out of the inside of the infusion tube 1. At this time, the liquid can be discharged from the right end of the infusion tube 1, flow through the splash-proof shell formed by the first shell 14 and the second shell 15, and then be discharged from the drain pipe 16. If the liquid in the infusion tube 1 generates reverse pressure due to the siphon effect, since the first barrier layer 9, the second barrier layer 10, and the sealing ring 12 are all elastic, the first barrier layer 9 will be tightly attached to the right end of the infusion tube 1, the second barrier layer 10 will protrude to the left, and the support ring 11 and the sealing ring 12 will also be elastic. Located inside the infusion tube 1, outside the sealing ring 12, and tightly against the inner wall of the infusion tube 1, the right end of the infusion tube 1 is sealed by the first barrier layer 9, the second barrier layer 10, the support ring 11, and the sealing ring 12. The greater the reverse pressure, the tighter the fit between the first barrier layer 9, the sealing ring 12, and the infusion tube 1. At the same time, the positioning plate 7 supports the first barrier layer 9, preventing the first barrier layer 9 and the second barrier layer 10 from being sucked into the infusion tube 1. The mounting plate 2 and the support shaft 3 can fix the limiting plate 4, and the support shaft 3 can limit the positioning plate 7 to prevent the first barrier layer 9 from being sucked into the infusion tube 1. The first damping layer 5 and the second damping layer 8 can buffer the movement of the positioning plate 7 when it is dislodged. When the device needs to be repaired, the connecting bolts between the first fixing plates 17 can be removed first, and then the connecting bolts between the second fixing plate 18 and the connecting flange 13 can be removed. Then the first shell 14 and the second shell 15 can be removed to repair the inside of the device. The device has good anti-siphon performance and can adapt to the reverse pressure of the liquid during use, ensuring that the first barrier layer 9 and the second barrier layer 10 do not dislodge and preventing liquid backflow.

[0027] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro-pressure anti-siphon valve, comprising an infusion tube (1), a first housing (14), and a second housing (15), characterized in that: An installation plate (2) is fixedly connected to the outside of the infusion tube (1). Multiple circumferentially distributed support shafts (3) are fixedly connected to the right side of the installation plate (2). A limiting plate (4) is fixedly connected to the right side of each support shaft (3). A first damping layer (5) is fixedly connected to the outside of each support shaft (3). Multiple compression springs (6) are fixedly connected to the left side of the limiting plate (4). A positioning plate (7) is fixedly connected to the left side of each compression spring (6). A second damping layer (8) is fixedly connected to the limiting groove of each positioning plate (7). The second damping layer (8) is slidably connected to the first damping layer (5). A first barrier layer (9) is fixedly connected to the left side of the positioning plate (7). A second barrier layer (10) is fixedly connected to the inner side of the first barrier layer (9). A support ring (11) is fixedly connected to the left side of layer (9), a sealing ring (12) is fixedly connected to the outside of the support ring (11), a connecting flange (13) is fixedly connected to the outside of the infusion tube (1), a first housing (14) is provided on the upper side of the mounting plate (2), a second housing (15) is provided on the lower side of the mounting plate (2), a drain pipe (16) is fixedly connected to the lower side of the second housing (15), a first fixing plate (17) is fixedly connected to both the front and rear sides of the first housing (14) and the second housing (15), and each pair of first fixing plates (17) aligned vertically are bolted together. A second fixing plate (18) is fixedly connected to the left side of both the first housing (14) and the second housing (15), and the second fixing plate (18) is bolted together with the connecting flange (13).

2. The micro-pressure anti-siphon valve according to claim 1, characterized in that: The right end of the infusion tube (1) is attached to the first barrier layer (9), the support ring (11) and the sealing ring (12) are both located inside the infusion tube (1), the outer side of the sealing ring (12) is attached to the inner wall of the infusion tube (1), and the connecting flange (13) is located on the left side of the mounting plate (2).

3. The micro-pressure anti-siphon valve according to claim 1, characterized in that: The mounting plate (2) and the positioning plate (7) are both annular metal plates, the limiting plate (4) is a circular metal plate, the inner diameter of the positioning plate (7) is smaller than the inner diameter of the infusion tube (1), and the outer diameter of the first barrier layer (9) is equal to the outer diameter of the infusion tube (1).

4. A micro-pressure anti-siphon valve according to claim 1, characterized in that: The outer side of the positioning plate (7) is provided with multiple circumferentially distributed limiting grooves. The number of limiting grooves of the positioning plate (7) is the same as the number of support shafts (3). The first damping layer (5) and the second damping layer (8) are both semi-circular ring sleeves.

5. A micro-pressure anti-siphon valve according to claim 1, characterized in that: The first barrier layer (9) is an annular rubber plate, the second barrier layer (10) is a rubber protrusion layer, the support ring (11) is a metal ring, and the sealing ring (12) is a rubber ring.

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