A negative pressure angle seat valve for a vacuum sewage pipeline

Abstract

The present invention discloses a negative pressure angle seat valve for a vacuum sewage pipeline, which includes a valve seat, a valve cover and a valve core. A partition member for separating a water inlet and a water outlet is arranged in the valve seat; the valve cover is arranged on a valve head, a second channel is arranged in the valve cover, and a pneumatic interface for controlling the valve core is arranged on the valve cover; the valve core is provided with a plugging head and a valve tail, the valve tail is slidably and sealingly connected to the inner wall of the second channel, the valve tail divides the interior of the valve cover into a control chamber and an atmospheric pressure chamber, and the pneumatic interface is communicated with the control chamber. The beneficial effects of the above technical solution are as follows: The control chamber is connected to a negative pressure device already existing in the system to generate negative pressure, so that the resultant force acting on the valve core is directed towards the valve cover, driving the valve core to move towards the valve cover to open the opening. It is more suitable for the field of vacuum sewage systems.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a negative pressure angle seat valve for a vacuum sewage pipeline. Background Art

[0002] The interface valve commonly used in the field of vacuum collection of waste water mainly includes a valve seat, a valve cover and a diaphragm, such as a fully open vacuum diaphragm valve disclosed in CN204533640U, including a valve seat, an opening on the side of the valve seat, a leather cup matching the opening, a jacket on the valve seat outside the leather cup, the jacket squeezes the outer periphery of the leather cup, and the space formed between the leather cup and the jacket is called a cavity, a spring is provided in the cavity, the upper end of the spring is connected to the jacket, and the lower end of the spring is provided with a first pressure block. The sealing surface formed by the negative pressure of the pipeline between the diaphragm and the base of the interface valve of this structure is greatly affected by the material, molding and negative pressure of the diaphragm and the base, and the sealing performance is unstable and it is very easy to leak; in addition, the sewage flow cross section of the interface valve of this structure is affected by the shrinkage molding shape of the diaphragm, and the shrinkage molding of the diaphragm is uncontrollable, so the final flow cross section of the interface valve is uncontrollable. Conventional pneumatic angle seat valves have good sealing performance, large flow cross section and stable performance, but their working medium is liquid, steam and other fluids without solid impurities, and can only use compressed air or neutral gas as power, which is not suitable for the field of vacuum collection of waste water.

[0003] In view of this, developing an angle seat valve for use in the field of vacuum collection of wastewater that has the performance of a conventional pneumatic angle seat valve has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a negative pressure angle seat valve for a vacuum sewage pipe, which has stable and reliable performance and not only uses vacuum as power, but also the working medium can be waste water containing solid impurities.

[0005] The technical solution provided by the present invention is as follows: A negative pressure angle seat valve for a vacuum sewage pipeline, comprising a valve seat, a valve cover and a valve core. An inlet, an outlet and a valve head which are communicated with each other are arranged on the valve seat. A partition member for separating the inlet and the outlet is arranged in the valve seat. An opening is arranged on the partition member, and a first channel leading to the opening is arranged in the valve head. The valve cover is arranged on the valve head. A second channel communicated with the first channel is arranged in the valve cover. The diameter of the second channel is larger than that of the first channel. A valve core for blocking the opening is slidably arranged in the first channel and the second channel. An air pressure interface for controlling the valve core is arranged on the valve cover. A spring connected to the valve core is further arranged in the valve cover. A plugging head is arranged at the first end of the valve core, and the plugging head faces the opening. A valve tail is arranged at the second end of the valve core. The edge of the valve tail is slidably and sealingly connected with the inner wall of the second channel. The valve tail divides the interior of the valve cover into a control cavity and an atmospheric pressure cavity, and the air pressure interface is communicated with the control cavity.

[0006] The beneficial effects of the above technical solution are as follows: The negative pressure device already provided in the vacuum sewage discharge system can be connected through the air pressure interface, so that negative pressure is generated in the control cavity, and the resultant force received by the valve core is directed towards the valve cover, thereby driving the valve core to move towards the valve cover to open the opening, so that the inlet and the outlet are communicated. It is more suitable for the field of vacuum sewage discharge systems.

[0007] Further, a cavity is arranged in the valve core and an opening is arranged at one end facing the valve tail. The first end of the spring extends into and is fixed in the cavity through the opening, and the second end of the spring is fixed at the top of the valve cover. The arranged spring can assist the valve core to reset, specifically, the valve core is pushed away from the valve cover, so that the angle seat valve can maintain a normally closed state.

[0008] Further, a central rod is arranged in the cavity, the central rod is located inside the spring, and the spring is a compression spring. The compression spring is compressed when the valve core is opened. When it is necessary to close the valve core, normal pressure air is introduced into the control cavity, so that the compressed spring can reset, thereby driving the valve core to block the opening.

[0009] Further, a magnet is arranged at one end of the central rod facing the valve tail, and a reed switch sensor matched with the magnet is arranged at the center outside the top of the valve cover. The cooperation of the magnet and the reed switch sensor can judge the opening and closing state of the valve core.

[0010] Further, the valve tail is a flange, and the flange extends radially outward from the valve core. The arranged flange makes the diameter of the valve tail larger than that of the valve core itself, and thus larger than the diameter of the plugging head.

[0011] Further, the end face of the valve cover is in contact with the top face of the valve head, and a groove for communicating the atmosphere and the normal pressure chamber is provided on the end face of the valve cover. By communicating with the atmosphere, it is ensured that the valve core can be driven by the negative pressure generated in the control chamber.

[0012] Further, the plugging head is made of rubber material, one end of the plugging head facing the opening is frustum-shaped, and a bolt is passed through the middle of the plugging head to be fixedly connected with the valve core. The frustum-shaped plugging head can increase the reliability of the seal between the plugging head and the opening.

[0013] Further, an air supplement joint is provided outside the valve seat, and the air supplement joint is communicated with the water inlet. The air supplement joint is used to suck in air, so that the air and the sewage entering from the water inlet form a gas-liquid two-phase mixture, thereby ensuring the smoothness of sewage discharge and avoiding blockage.

[0014] Further, the valve head and the valve seat are arranged at a predetermined angle, and the plane where the sealing element is located is perpendicular to the central axis of the valve seat.

[0015] Further, the valve cover and the valve head are connected by a flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 It is a cross-sectional view of an embodiment of the present invention in the closed state;

[0019] Figure 3 It is a cross-sectional view of an embodiment of the present invention in the open state.

[0020] Reference numerals: valve seat 1, water outlet 101, water inlet 102, valve head 103, air supplement joint 104, sealing element 105, opening 106, bolt 2, plugging head 3, valve core 4, central rod 401, valve tail 402, oil seal 5, O-ring 6, valve cover 7, air pressure interface 701, fixed blind hole 702, control chamber 703, normal pressure chamber 704, groove 705, magnetic reed switch sensor 8, compression spring 9, magnet 10, pressing plate 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0022] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0023] As Figures 1-3 shown, this embodiment provides a negative pressure angle seat valve for a vacuum sewage pipeline, which is connected between a lifter and a negative pressure tank. The negative pressure of the negative pressure tank is provided by a negative pressure pump. After the negative pressure angle seat valve is opened, the sewage in the lifter is sucked into the negative pressure tank. The negative pressure angle seat valve includes a valve seat 1, a valve cover 7 and a valve core 4. An inlet 102, an outlet 101 and a valve head 103 that communicate with each other are provided on the valve seat 1. The inlet 102 is connected to the lifter, and the outlet 101 is connected to the negative pressure tank. A partition member 105 that separates the inlet 102 and the outlet 101 is provided in the valve seat 1. An opening 106 is provided on the partition member 105, and a first channel leading to the opening 106 is provided in the valve head 103. The valve cover 7 is provided on the valve head 103. A second channel that communicates with the first channel is provided in the valve cover 7. The diameter of the second channel is larger than the diameter of the first channel. A valve core 4 that blocks the opening 106 is slidably provided in the first channel and the second channel. An air pressure interface 701 for controlling the valve core 4 is provided on the valve cover 7, and this air pressure interface 701 is connected to the negative pressure pump through a three-way valve. When it is necessary to pump the sewage in the lifter, the three-way valve is opened, the air pressure interface 701 is connected to the negative pressure pump, and the angle seat valve is opened. When the sewage in the lifter is no longer pumped, the three-way valve is closed, and the air pressure interface 701 is connected to the atmosphere through the three-way valve, so that both the normal pressure chamber and the control chamber are at normal pressure, and the valve core 4 is reset. A spring connected to the valve core 4 is also provided in the valve cover 7. A plug 3 is provided at the first end of the valve core 4, the plug 3 faces the opening 106, a valve tail 402 is provided at the second end of the valve core 4, and the edge of the valve tail 402 is slidably and sealingly connected to the inner wall of the second channel, that is, the valve tail 402 always slides in the valve cover 7. The valve tail 402 divides the interior of the valve cover 7 into a control chamber 703 and a normal pressure chamber 704, and the air pressure interface 701 communicates with the control chamber 703.

[0024] In use, the pressure interface 701 can be connected to the negative pressure device already provided in the vacuum sewage system, so as to generate negative pressure in the control cavity 703. Since there may be accumulated water in the pipeline connected to the water outlet, the negative pressure in the control cavity 703 is greater than or equal to the negative pressure value in the water outlet. And the diameter of the valve tail 402 of the valve core 4 is larger than that of the plug 3. The valve core 4 overcomes the elastic force of the spring and the suction force generated by the negative pressure at the plug 3, so that the resultant force received by the valve core 4 is directed towards the valve cover 7, thereby driving the valve core 4 to move towards the valve cover 7 to open the opening 106, so that the water inlet 102 and the water outlet 101 are communicated.

[0025] The valve head 103 is arranged at a predetermined angle with the valve seat 1, so that the valve seat 1 is in the shape of a Y-shaped tee, and the plane where the spacer 105 is located is perpendicular to the central axis of the valve seat 1.

[0026] The valve core 4 needs to move during the opening and closing process of the negative pressure angle seat valve, and a spring is also connected between the valve core 4 and the valve cover 7. For this reason, a cavity is arranged in the valve core 4 and an open end is arranged at one end facing the valve tail 402. Correspondingly, the end of the valve core 4 away from the open end is closed. The first end of the spring extends into and is fixed in the cavity through the open end, pressing against the bottom inside the valve core 4, and the second end of the spring is fixed to the top of the valve cover 7. The arranged spring can assist the valve core 4 to reset, specifically by pushing the valve core 4 away from the valve cover 7, so that the angle seat valve can maintain a normally closed state.

[0027] During the movement of the valve core 4, in order to keep the spring at the center of the valve core 4, a central rod 401 is arranged in the cavity of the valve core 4, and the central rod 401 is located inside the spring. The spring can be a compression spring 9. The compression spring 9 is compressed when the valve core 4 is opened. When it is necessary to close the valve core 4, normal pressure air is introduced into the control cavity 703, so that the compressed spring can reset, thereby driving the valve core 4 to block the opening 106. After the valve core 4 is closed, the resultant force of the suction force generated by the negative pressure at the plug 3 and the elastic force of the compression spring 9 on the valve core 4 enables the valve core 4 to be more effectively and stably in the closed state.

[0028] In order to ensure that the diameter of the valve tail 402 is larger than that of the plug 3, the valve tail 402 is preferably a flange, and the flange extends radially outward from the valve core 4. The arranged flange makes the diameter of the valve tail 402 larger than that of the valve core 4 itself, and the diameter of the plug 3 is the same as that of the main body of the valve core 4, so that the diameter of the valve tail 402 is larger than that of the plug 3. Among them, the plug 3 is made of rubber material, and the end of the plug 3 facing the opening 106 is in a frustum shape, and a bolt 2 is passed through the middle of the plug 3 to be fixedly connected with the valve core 4. The frustum-shaped plug 3 can increase the sealing reliability between the plug 3 and the opening 106.

[0029] The end face of the valve cover 7 is in contact with the top face of the valve head 103. A groove 705 communicating with the atmosphere and the normal pressure chamber 704 is provided on the end face of the valve cover 7. By communicating with the atmosphere, it is ensured that the valve core 4 can be driven by the negative pressure generated in the control chamber 703. To ensure the reliability of the connection, the valve cover 7 and the valve head 103 are connected by a flange.

[0030] In the negative pressure angle seat valve, in order to have a greater compressive capacity, the outsides of the valve head 103 and the valve cover 7 are both set to be cylindrical, and the first channel and the second channel are also cylindrical, thereby defining that the outer shape of the valve core 4 is also cylindrical. When the valve core 4 and the first channel slide, lubrication needs to be ensured and isolated from the outside. Therefore, an oil seal 5 is provided at a position corresponding to the top in the first channel of the valve head 103, and the oil seal 5 is fixed by a pressing plate 11. In addition, since the control chamber 703 and the normal pressure chamber 704 need to be kept in a sealed state, an O-ring seal 6 is provided on the outer side face of the flange.

[0031] In the entire sewage disposal system, there are multiple lifters and multiple negative pressure angle seat valves. The states of these angle seat valves need to be mastered by the staff. If the manual observation method is adopted, it will undoubtedly waste a lot of manpower and time. To improve efficiency, a magnet 10 is provided at one end of the center rod 401 facing the valve tail 402. The center rod 401 is a hollow rod, and there is a hole at the tail end of the hollow rod. The magnet 10 is in interference fit with the hole at the tail of the center rod 401. A reed switch sensor 8 matching the magnet 10 is provided at the center of the outer side of the top of the valve cover 7. Specifically, a fixed blind hole 702 is provided at the center of the top of the valve cover 7, and the reed switch sensor 8 is in interference fit with the fixed blind hole 702. The cooperation between the magnet 10 and the reed switch sensor 8 can judge the opening and closing state of the valve core 4. The judgment principle is as follows: When the magnet 10 moves to the position closest to the reed switch sensor 8, the reed switch sensor 8 is in a conducting state due to the magnetic force of the magnet 10, and the conducting signal is transmitted to the control system, thereby determining that the negative pressure angle seat valve is in an open state. When the valve core 4 is in the closed state, the magnet 10 is taken away by the valve core 4 and moves away from the top of the valve cover 7 and the reed switch sensor 8. At this time, the reed switch sensor 8 is in an open circuit state, and the open circuit signal is also transmitted to the control system, thereby determining that the negative pressure angle seat valve is in the closed state.

[0032] There will inevitably be some solid substances in the sewage, such as grease and sundries. These solid substances may adhere to the sewage pipe, causing blockage. To ensure the smoothness of the sewage discharge process, an air supplement joint 104 is also provided outside the valve seat 1, and the air supplement joint 104 is communicated with the water inlet 102. The air supplement joint 104 is used to inhale air, so that the air and the sewage entering from the water inlet 102 form a gas-liquid two-phase mixture, reducing the possibility of solid substances adhering and depositing on the sewage pipe, thereby ensuring the smoothness of sewage discharge and avoiding blockage. In addition, the air supplement joint 104 can also increase the suction lift of the system under the same system negative pressure.

[0033] The working states of this negative pressure angle seat valve, including opening and closing, are as follows:

[0034] When opening, open the three-way valve between the air pressure interface 701 and the vacuum pump to generate negative pressure in the control cavity 703. The valve core 4 moves towards the top of the valve cover 7, and the plug 3 moves into the first channel of the valve head 103. The water inlet 102 and the water outlet 101 are in communication. Under the action of the negative pressure in the vacuum sewage pipe, the sewage in the lifter is sucked, and at the same time, air is also sucked in through the air supplement joint 104.

[0035] When closing, introduce normal pressure air through the air pressure interface 701 to make the control cavity 703 in a normal pressure state. The valve core 4 assembly moves towards the sealing member 105 under the elastic force of the compression spring 9, and finally the plug 3 blocks the opening 106; the plug 3 and the valve seat 1 form a sealing surface under the combined action of the elastic force and the negative pressure in the pipeline, and the water inlet 102 and the water outlet 101 are out of communication.

[0036] In the description of the present application, it should be understood that the terms in the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, "a plurality of" means more than two unless otherwise specifically defined.

[0037] In the present application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In the description of the present invention, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the specification of the present invention.

Claims

1. A negative pressure angle seat valve for a vacuum sewage pipeline, characterized in that, Comprising: A valve seat (1), on which there are a water inlet (102), a water outlet (101) and a valve head (103) that are interconnected. Inside the valve seat (1), there is a sealing member (105) that separates the water inlet (102) and the water outlet (101). An opening (106) is provided on the sealing member (105), and a first channel leading to the opening (106) is provided inside the valve head (103); A valve cover (7), which is arranged on the valve head (103). A second channel communicating with the first channel is provided inside the valve cover (7), and the diameter of the second channel is larger than that of the first channel. A valve core (4) that blocks the opening (106) is slidably arranged in the first channel and the second channel. A pneumatic interface (701) for controlling the valve core (4) is provided on the valve cover (7), and a spring connected to the valve core (4) is also provided inside the valve cover (7); and, The valve core (4), a plugging head (3) is provided at the first end of the valve core (4), the plugging head (3) faces the opening (106), a valve tail (402) is provided at the second end of the valve core (4), and the edge of the valve tail (402) is slidably and sealingly connected to the inner wall of the second channel. The valve tail (402) divides the interior of the valve cover (7) into a control chamber (703) and an atmospheric pressure chamber (704), and the pneumatic interface (701) communicates with the control chamber (703); A cavity is provided inside the valve core (4) and is open at one end facing the valve tail (402). The first end of the spring extends into and is fixed in the cavity through the opening, and the second end of the spring is fixed to the top of the valve cover (7); A gas supplement joint (104) is further provided outside the valve seat (1), and the gas supplement joint (104) communicates with the water inlet (102).

2. The negative pressure angle seat valve for a vacuum sewage pipeline according to claim 1, wherein A central rod (401) is provided in the cavity, the central rod (401) is located inside the spring, and the spring is a compression spring (9).

3. The negative pressure angle seat valve for a vacuum sewage pipeline according to claim 2, characterized in that, A magnet (10) is provided at one end of the central rod (401) facing the valve tail (402), and a magnetic reed switch sensor (8) matching the magnet (10) is provided at the center outside the top of the valve cover (7).

4. A negative pressure angle seat valve for a vacuum sewage pipeline according to claim 1, characterized in that, The valve tail (402) is a flange, and the flange extends radially outward from the valve core (4).

5. A negative pressure angle seat valve for a vacuum sewage pipeline according to any one of claims 1-3, characterized in that, The end face of the valve cover (7) is in contact with the top face of the valve head (103), and a groove (705) communicating the atmosphere and the atmospheric pressure chamber (704) is further provided on the end face of the valve cover (7).

6. A negative pressure angle seat valve for a vacuum sewage pipeline according to any one of claims 1-3, characterized in that, The plugging head (3) is made of rubber material, one end of the plugging head (3) facing the opening (106) is frustum-shaped, and a bolt (2) is passed through the middle of the plugging head (3) to be fixedly connected to the valve core (4).

7. A negative pressure angle seat valve for a vacuum sewage pipeline according to any one of claims 1-3, characterized in that, The valve head (103) is arranged at a predetermined angle with the valve seat (1), and the plane where the sealing member (105) is located is perpendicular to the central axis of the valve seat (1).

8. A negative pressure angle seat valve for a vacuum sewage pipeline according to any one of claims 1-3, characterized in that, The valve cover (7) is connected to the valve head (103) through a flange.

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