A vacuum diaphragm valve and drainage system with a single-chamber structure

Abstract

The utility model relates to a vacuum diaphragm valve and drainage system with a single-chamber structure, including a valve seat, a valve cover, a diaphragm and a pressure seat; the valve seat is a tubular structure, an opening is provided on the side of the valve seat, and a sealing baffle is provided on the inner wall of the valve seat corresponding to the position of the opening, and a first interface is also provided on the valve seat; the valve cover is a tubular structure with an opening at one end, the open end of the valve cover is connected to the side of the valve seat and closes the opening, and a second interface is provided at the other end of the valve cover; the diaphragm is provided between the valve seat and the valve cover, a working chamber is formed between the diaphragm and the valve cover, and a groove matching the sealing baffle is provided on the side of the diaphragm away from the valve cover; the pressure seat is slidably provided in the valve cover along the height direction of the valve cover, and the pressure seat is connected to the diaphragm. The diaphragm valve has a simple structure, is easy to install and maintain, and has good sealing and reliability when closed.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage valves, in particular to a vacuum diaphragm valve with a single cavity structure and a drainage system. Background Art

[0002] The vacuum negative pressure drainage system uses negative pressure suction to quickly transfer sewage in the pipe network, thereby realizing the collection and discharge of sewage. The vacuum negative pressure drainage system is generally composed of a vacuum unit, a vacuum pipe network, and a negative pressure sewage collector. A liquid level sensor is installed in the negative pressure sewage collector, and a vacuum valve is installed between the vacuum pipe network and the negative pressure sewage collector. During operation, sewage flows from each collection terminal into the negative pressure sewage collector for temporary storage. When the liquid level in the negative pressure sewage collector exceeds the set height, the vacuum valve opens and negative pressure pumping is performed on the negative pressure sewage collector. When the liquid level in the negative pressure sewage collector drops to a certain value, the vacuum valve needs to be closed, and the negative pressure sewage collector continues to collect and store, waiting for the next cycle of negative pressure sewage transportation.

[0003] The patent "Vacuum Drain Valve" (authorization number CN101349070B) discloses a vacuum drain valve, which includes a vacuum bag, a tortoise bowl, and a pressure seat. The vacuum bag and the tortoise bowl are connected through the pressure seat, and the valve is opened and closed by changing the vacuum degree of the vacuum bag to drive the pressure seat and the tortoise bowl to move. The valve contains multiple components, with a complex structure and high assembly and maintenance costs. The rubber vacuum bag will age with the increase of usage time and frequency, and it is easy to fall off from the pressure seat during use, resulting in the valve being unable to work stably.

[0004] "A Fully Open Vacuum Diaphragm Valve" (Grant No. CN204533640) and "A Vacuum Diaphragm Valve with Simple Structure" (Grant No. CN204387386U) respectively disclose a fully open vacuum diaphragm valve and a vacuum diaphragm valve with simple structure. Both patents include structures such as a valve seat, a jacket and a leather cup. The leather cup is moved by changing the air pressure in the cavity between the jacket and the leather cup to open and close the valve. Since the leather cup of this type of valve lacks a supporting structure, it only relies on air pressure to press the leather cup down on the valve seat when the valve is closed. This may cause the leather cup to be unable to stably contact the valve seat, affecting its sealing performance and causing leakage.

[0005] In summary, there are two types of vacuum diaphragm valves at present: double-chamber structure and single-chamber structure vacuum tube diaphragm valve. Double-chamber structure vacuum diaphragm valve has a complex structure, high assembly and maintenance costs, and the rubber vacuum bag will age with the increase of use time and frequency, and it is easy to fall off from the pressure seat during use, and the working stability is poor; the leather cup used for switching the valve in the single-chamber structure vacuum diaphragm valve lacks a supporting structure. When the valve is closed, it only relies on air pressure to press the leather cup down on the valve seat, which may cause the leather cup to be unable to stably contact the valve seat, and the valve sealing performance is poor. Utility Model Content

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the problems of the vacuum valve in the prior art, such as complex structure, high assembly and maintenance costs, poor sealing and possible valve leakage.

[0007] In order to solve the above technical problems, the utility model provides a vacuum diaphragm valve with a single cavity structure, comprising:

[0008] A valve seat, wherein the valve seat is a tubular structure, and the two ends of the valve seat are respectively a sewage input end and a sewage output end, an opening is provided on the side of the valve seat, and a sealing strip extending around the circumference of the valve seat is provided on the inner wall of the valve seat corresponding to the position of the opening, and a first interface is also provided on the side of the valve seat close to the output end thereof;

[0009] A valve cover, wherein the valve cover is a cylindrical structure with an opening at one end, the open end of the valve cover is connected to the side of the valve seat and closes the opening, and the other end of the valve cover is provided with a second interface connected to the interior thereof;

[0010] A diaphragm, wherein the diaphragm is arranged between the valve seat and the valve cover, a working cavity is formed between the diaphragm and the valve cover, and a groove matching the sealing strip is formed on a surface of the diaphragm away from the valve cover;

[0011] A pressure seat is slidably arranged in the valve cover along the height direction of the valve cover, and the pressure seat is connected to the diaphragm.

[0012] In an embodiment of the utility model, two parallel pressure plates are arranged at one end of the pressure seat close to the diaphragm, and the free ends of the two pressure plates are arc surfaces matching the inner wall of the valve seat and in contact with the diaphragm.

[0013] In an embodiment of the utility model, the diaphragm is provided with a limiting protrusion embedded between the two pressing plates.

[0014] In one embodiment of the utility model, the valve cover is provided with a guide rod extending along its height direction, one end of the pressure seat is provided with a guide hole and is slidably connected to the guide rod through the guide hole, and the other end of the pressure seat is connected to the diaphragm through a plurality of symmetrically arranged connecting rods.

[0015] In one embodiment of the utility model, an annular groove coaxial with the guide rod is formed at one end of the pressure seat close to the guide rod, a spring is coaxially arranged in the annular groove, one end of the spring abuts against the pressure seat, and the other end abuts against the valve cover.

[0016] In one embodiment of the present invention, a buffer pad is provided at the bottom of the guide hole.

[0017] In an embodiment of the present utility model, the position of the valve seat corresponding to the opening is protruded toward the opening, and the sealing strip is arranged at the protrusion.

[0018] In an embodiment of the present invention, the diaphragm is made of elastic material.

[0019] A drainage system comprises a vacuum diaphragm valve with a single-chamber structure as described in any one of the above items.

[0020] In one embodiment of the utility model, a reversing valve and a one-way valve are also included, wherein the reversing valve includes port a, port b and port c, wherein port a is connected to the second interface, port b is connected to the atmosphere, port c is connected to the input end of the one-way valve, and the output end of the one-way valve is connected to the first interface.

[0021] The above technical solution of the utility model has the following advantages compared with the prior art:

[0022] The utility model describes a vacuum diaphragm valve and drainage system with a single-chamber structure, comprising a valve seat, a valve cover, a diaphragm and a pressure seat; the valve seat is a tubular structure, with an input end and an output end at its two ends respectively, an opening being provided on the valve seat, and a sealing baffle being provided on the inner wall of the valve seat, and a first interface being provided on the valve seat; the valve cover is a cylindrical structure, with the opening end of the valve cover connected to the valve seat to close the opening, and a second interface being provided on the other end of the valve cover; the diaphragm is provided between the valve seat and the valve cover, a working chamber is formed between the diaphragm and the valve cover, and a groove matching the sealing baffle is provided on the diaphragm; the pressure seat is slidably provided in the valve cover along the height direction of the valve cover and is connected to the diaphragm.

[0023] 1. The diaphragm and the valve cover of the vacuum diaphragm valve of the utility model directly form a working chamber. By changing the pressure in the working chamber, a pressure difference can be formed on both sides of the diaphragm, thereby driving the diaphragm to press the inner wall of the valve seat to close the valve or driving the diaphragm to separate from the inner wall of the valve seat to open the valve; the overall structure is simple, the installation and maintenance are convenient, and the manufacturing and use costs are low.

[0024] 2. The vacuum diaphragm valve is provided with grooves and sealing strips that can cooperate with each other on the inner wall of the diaphragm and the valve seat, which can improve the sealing performance and reliability of the valve when it is closed.

[0025] 3. The vacuum diaphragm valve is also provided with a pressure seat connected to the diaphragm, which can ensure the stability of the diaphragm during the valve switching process and the tightness of the diaphragm against the inner wall of the valve seat when the valve is closed. A spring is also provided between the pressure seat and the valve cover to increase the downward pressure, thereby assisting the pressure seat to press the diaphragm, further improving the stability, reliability and sealing of the entire valve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0027] Figure 1 This is a schematic diagram of the overall structure of a vacuum diaphragm valve with a single-chamber structure in a closed state according to a preferred embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure of the vacuum diaphragm valve of the single-chamber structure in the open state of the preferred embodiment of the utility model;

[0029] Figure 3 yes Figure 2 An enlarged view of part A of the vacuum diaphragm valve with a single chamber structure is shown;

[0030] Figure 4 It is a structural schematic diagram of a valve seat of a vacuum diaphragm valve with a single cavity structure according to a preferred embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a pressure seat of a vacuum diaphragm valve with a single-chamber structure according to a preferred embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of a vacuum diaphragm valve with a single cavity structure according to a preferred embodiment of the utility model installed in a negative pressure drainage system.

[0033] Explanation of the reference numerals in the drawings in the specification: 1. valve seat; 11. input end; 12. output end; 13. opening; 14. sealing strip; 15. first interface; 2. valve cover; 21. second interface; 22. guide rod; 3. diaphragm; 31. groove; 32. limiting protrusion; 4. pressure seat; 41. pressure plate; 42. guide hole; 43. connecting rod; 44. annular groove; 5. spring; 6. buffer pad; 7. reversing valve; 71. port a; 72. port b; 73. port c; 8. one-way valve; G. negative pressure pipeline. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0035] Embodiment 1

[0036] Reference Figure 1-Figure 6 As shown, the utility model is a vacuum diaphragm valve with a single chamber structure, comprising:

[0037] The valve seat 1 is a tubular structure, and the two ends of the valve seat 1 are respectively a sewage input end 11 and a sewage output end 12, an opening 13 is provided on the side of the valve seat 1, and a sealing strip 14 extending around the circumference of the valve seat 1 is provided on the inner wall of the valve seat 1 corresponding to the position of the opening 13, and a first interface 15 is also provided on the side of the valve seat 1 close to the output end 12;

[0038] The valve cover 2 is a cylindrical structure with one end open. The open end of the valve cover 2 is connected to the side of the valve seat 1 and closes the opening 13. The other end of the valve cover 2 is provided with a second interface 21 connected to the interior thereof;

[0039] The diaphragm 3 is arranged between the valve seat 1 and the valve cover 2, a working chamber is formed between the diaphragm 3 and the valve cover 2, and a groove 31 matching the sealing strip 14 is formed on a surface of the diaphragm 3 away from the valve cover 2;

[0040] The pressure seat 4 is slidably disposed in the valve cover 2 along the height direction of the valve cover 2 , and the pressure seat 4 is connected to the diaphragm 3 .

[0041] Specifically, the valve seat 1 is connected to the negative pressure pipeline G of the negative pressure sewage collector, the a port 71 of the reversing valve 7 is connected to the second interface 21, the b port 72 is connected to the atmosphere, and the c port 73 is connected to the first interface 15; in the initial state, the a port 71 and the b port 72 of the reversing valve 7 are connected, and the working chamber is at atmospheric pressure. At this time, the pressure of the diaphragm 3 on the side of the valve seat 1 is less than the pressure on the side of the working chamber. Under the action of the air pressure, the bottom of the diaphragm 3 is pressed against the inner wall of the valve seat 1 and the groove 31 at the bottom of the diaphragm 3 is embedded with the sealing strip 14. The vacuum diaphragm valve is in a closed state and the negative pressure pipeline is closed; when the liquid level in the negative pressure sewage collector reaches a specified height, the reversing valve 7 switches to the a port 71 and the c port 72. The port 73 is connected, and the working chamber is evacuated to a vacuum. The pressure on the side of the diaphragm 3 located on the valve seat 1 is greater than the pressure on the side of the working chamber. Under the action of the air pressure, the bottom of the diaphragm 3 is separated from the inner wall of the valve seat 1, and the vacuum diaphragm valve is switched to the open state. The sewage in the negative pressure sewage collector is pumped out through the negative pressure pipeline; and as the sewage in the negative pressure sewage collector is gradually pumped out, the liquid level of the sewage decreases. When the liquid level of the sewage decreases below the predetermined liquid level, the reversing valve 7 is switched to the connection between the a port 71 and the b port 72, and the working chamber is converted to atmospheric pressure. The vacuum diaphragm valve is switched to the closed state, and the pumping stops until a certain amount of sewage is collected in the negative pressure sewage collector and the next working cycle begins.

[0042] Reference Figure 5 As shown, further, two mutually parallel pressing plates 41 are provided at one end of the pressing seat 4 close to the diaphragm 3, and the free ends of the two pressing plates 41 are arc surfaces matching the inner wall of the valve seat 1 and are in contact with the diaphragm 3. Specifically, when the valve is closed, the arc surface of the pressing plate 41 can make the diaphragm 3 and the inner wall of the valve seat 1 fit closely together, achieving a better sealing effect.

[0043] Reference Figure 1 and Figure 2 As shown, further, the diaphragm 3 is provided with a limiting protrusion 32 embedded between the two pressure plates 41. It can be imagined that the limiting protrusion 32 can play a limiting role, which can prevent relative displacement between the diaphragm 3 and the pressure seat 4 and ensure the sealing effect.

[0044] Furthermore, the valve cover 2 is provided with a guide rod 22 extending in the height direction thereof, one end of the pressure seat 4 is provided with a guide hole 42 and is slidably connected to the guide rod 22 through the guide hole 42, and the other end of the pressure seat 4 is connected to the diaphragm 3 through a plurality of symmetrically arranged connecting rods 43. It can be imagined that the mutually coordinated guide rod 22 and guide hole 42 can play a guiding role in the process of the pressure seat 4 moving, thereby avoiding the diaphragm 3 and the pressure seat 4 from deviating during the up and down movement, ensuring that the sealing stop bar 14 can be accurately embedded in the groove 31; and it can also ensure that the diaphragm 3 is tightly fitted with the inner wall of the valve seat 1 to ensure the sealing effect. At the same time, it can also be imagined that the guide rod 22 and guide hole 42 can also play a role in motion limiting, which can avoid excessive deformation of the diaphragm 3 during the working process, which is conducive to improving the service life of the diaphragm 3.

[0045] Reference Figure 5 As shown, further, an annular groove 44 coaxial with the guide rod 22 is provided at one end of the pressure seat 4 close to the guide rod 22, and a spring 5 is coaxially arranged in the annular groove 44, one end of the spring 5 abuts against the pressure seat 4, and the other end abuts against the valve cover 2. Specifically, when the vacuum diaphragm valve is in an open state, the spring 5 is further compressed to store a certain amount of elastic potential energy, which can play an auxiliary role in the process of switching the vacuum diaphragm valve to a closed state, and to a certain extent can also improve the close fit between the diaphragm 3 and the inner wall of the valve seat 1, which is beneficial to improve the sealing of the entire vacuum diaphragm valve. Specifically, the annular groove 44 can limit the spring 5 to ensure the stability of the spring 5 during the operation of the equipment.

[0046] Reference Figure 2 and Figure 3 As shown, further, a buffer pad 6 is provided at the bottom of the guide hole 42. The buffer pad 6 is used to reduce the impact between the guide rod 22 and the guide hole 42, which can avoid damage to the parts due to excessive impact force, and can also reduce the noise generated during the operation of the valve.

[0047] Furthermore, the position of the valve seat 1 corresponding to the opening 13 is protruded toward the opening 13, and the sealing strip 14 is arranged at the protrusion.

[0048] Furthermore, the diaphragm 3 is made of elastic material, such as rubber.

[0049] Embodiment 2

[0050] The utility model also discloses a drainage system, comprising a vacuum diaphragm valve with a single-chamber structure as in the first embodiment.

[0051] Furthermore, it also includes a reversing valve 7 and a one-way valve 8, the reversing valve 7 includes a port 71, b port 72 and c port 73, the a port 71 is connected to the second interface 21, the b port 72 is connected to the atmosphere, the c port 73 is connected to the input end of the one-way valve 8, and the output end of the one-way valve 8 is connected to the first interface 15.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A vacuum diaphragm valve with a single chamber structure, characterized in that: include: A valve seat, wherein the valve seat is a tubular structure, and the two ends of the valve seat are respectively a sewage input end and a sewage output end, an opening is provided on the side of the valve seat, and a sealing strip extending around the circumference of the valve seat is provided on the inner wall of the valve seat corresponding to the position of the opening, and a first interface is also provided on the side of the valve seat close to the output end thereof; A valve cover, wherein the valve cover is a cylindrical structure with an opening at one end, the open end of the valve cover is connected to the side of the valve seat to seal the opening, and the other end of the valve cover is provided with a second interface connected to the interior thereof; A diaphragm, wherein the diaphragm is arranged between the valve seat and the valve cover, a working cavity is formed between the diaphragm and the valve cover, and a groove matching the sealing strip is formed on a surface of the diaphragm away from the valve cover; A pressure seat is slidably arranged in the valve cover along the height direction of the valve cover, and the pressure seat is connected to the diaphragm.

2. The vacuum diaphragm valve with a single chamber structure according to claim 1, characterized in that: Two mutually parallel pressing plates are arranged at one end of the pressing seat close to the diaphragm, and the free ends of the two pressing plates are arc surfaces matching the inner wall of the valve seat and in contact with the diaphragm.

3. The vacuum diaphragm valve with a single chamber structure according to claim 2, characterized in that: The diaphragm is provided with a limiting protrusion which is embedded between the two pressing plates.

4. The vacuum diaphragm valve with a single chamber structure according to claim 1, characterized in that: The valve cover is provided with a guide rod extending along its height direction, one end of the pressure seat is provided with a guide hole and is slidably connected to the guide rod through the guide hole, and the other end of the pressure seat is connected to the diaphragm through a plurality of symmetrically arranged connecting rods.

5. The vacuum diaphragm valve with a single chamber structure according to claim 4, characterized in that: An annular groove coaxial with the guide rod is formed at one end of the pressure seat close to the guide rod, a spring is coaxially arranged in the annular groove, one end of the spring abuts against the pressure seat, and the other end abuts against the valve cover.

6. The vacuum diaphragm valve with a single chamber structure according to claim 4, characterized in that: A buffer pad is arranged at the bottom of the guide hole.

7. The vacuum diaphragm valve with a single chamber structure according to claim 1, characterized in that: The position of the valve seat corresponding to the opening protrudes toward the opening, and the sealing baffle is arranged at the protrusion.

8. The vacuum diaphragm valve with a single chamber structure according to claim 1, characterized in that: The diaphragm is made of elastic material.

9. A drainage system, characterized in that: A vacuum diaphragm valve with a single chamber structure comprising the following:

10. The drainage system according to claim 9, characterized in that: It also includes a reversing valve and a one-way valve, the reversing valve includes port a, port b and port c, the port a is connected to the second interface, the port b is connected to the atmosphere, the port c is connected to the input end of the one-way valve, and the output end of the one-way valve is connected to the first interface.

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