Sewage air valve

Abstract

The utility model discloses a sewage air valve which comprises a valve body, a valve cavity is formed in the valve body, and a second opening and a first opening which are communicated with the valve cavity are formed in the upper side and the lower side of the valve body respectively. A floating ball capable of floating up and down and a main valve clack connected with the floating ball through a long connecting rod are arranged in the valve cavity; the valve further comprises a connecting frame fixedly arranged relative to the main valve clack, an exhaust hole communicated with the valve cavity and the outside is formed in the axial center of the main valve clack, and the end, close to the main valve clack, of the long connecting rod is movably connected with the connecting frame and further provided with a micro-exhaust valve clack. When the floating ball floats up and down, the main valve clack is driven to open or close the second opening, and meanwhile the micro-discharge valve clack is driven to open or close the exhaust hole. Air suction and exhaust can be carried out in time to prevent sewage from entering the second opening of the air valve, and trace air exhaust is carried out during pipeline operation.

Description

Technical Field

[0001] This utility model relates to the field of air valve technology, and more specifically, to a sewage air valve. Background Technology

[0002] Wastewater transport systems are an essential part of urban infrastructure, and wastewater air valves are indispensable in wastewater transport pipelines. Installed on wastewater pipelines, wastewater air valves are crucial devices that release large amounts of air during filling, release small amounts of air during transport, and draw in large amounts of air under negative pressure.

[0003] Because sewage contains oil and other contaminants that easily float to the surface and adhere to valves and pipes, and because air valves are installed high up in the pipes, to prevent sewage from being discharged from the opening on the upper side of the air valve, the oil and contaminants adhering to the air valve port can cause the sewage air valve to malfunction. Therefore, the sewage air valve body is relatively long. When in use, the sewage air valve is required to only allow air to be introduced and vented, and not to drain water, to prevent sewage from entering the air valve opening.

[0004] Furthermore, during the pipeline sewage transportation process, 2% to 3% of the sewage still contains gas that is released. If this gas is not removed in time, it will accumulate in the valve cavity, causing an increase in the internal pressure of the valve and affecting the operation of the air valve. Utility Model Content

[0005] This utility model provides a sewage air valve that can promptly draw in and vent air to prevent sewage from entering the opening on the upper side of the air valve, while also venting a small amount of air during pipeline operation.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A wastewater air valve includes a valve body, a valve cavity is formed in the valve body, and a first opening and a second opening communicating with the valve cavity are respectively provided on the lower side and the upper side of the valve body.

[0008] The valve chamber is equipped with a float that can float up and down and a main valve disc connected to the float via a long connecting rod;

[0009] It also includes a connecting frame that is fixedly arranged relative to the main valve disc. The main valve disc has an exhaust port that communicates with the valve chamber and the outside. The end of the long connecting rod near the main valve disc is movably connected to the connecting frame and a micro exhaust valve disc is also provided at that end. When the float moves up and down, it drives the main valve disc to open or close the second opening and can also drive the micro exhaust valve disc to open or close the exhaust port.

[0010] As a further improvement, a valve disc connecting seat is provided at the center of the main valve disc. One end of the valve disc connecting seat extends to the upper side of the main valve disc and is connected to the guide rod, and the other end is connected to the connecting frame and extends through the connecting frame to the inner side of the connecting frame.

[0011] As a further improvement, the valve disc connecting seat is also connected to a micro-discharge valve seat at one end located inside the connecting frame.

[0012] As a further improvement, the exhaust port is opened on the valve disc connecting seat, a guide rod through hole communicating with one end of the exhaust port is opened in the guide rod, and a through hole communicating with the other end of the exhaust port is opened in the micro exhaust valve seat.

[0013] As a further improvement, the micro-discharge valve flap is slidably disposed relative to the connecting frame, with one end of the micro-discharge valve flap located inside the connecting frame and the other end passing through the connecting frame and connected to the long connecting rod.

[0014] As a further improvement, an annular baffle is provided at one end of the micro-discharge valve located inside the connecting frame, and the annular baffle can abut against the inside of the connecting frame.

[0015] As a further improvement, the upper side of the valve body is sealed to the valve cover, and the second opening is formed on the valve cover.

[0016] As a further improvement, a connecting guide seat is slidably sleeved on the guide rod, the guide seat being located at the axial center of the second opening and fixedly disposed relative to the valve cover.

[0017] As a further improvement, a valve seat is connected to the inner side of the second opening, and a main sealing ring is embedded between the valve seat and the inner wall of the second opening. The main sealing ring can cooperate with the main valve disc to form a sealing connection.

[0018] As a further improvement, the guide seat is connected to the valve cover via a guide bracket.

[0019] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0020] (1) In the sewage air valve of this utility model, air is vented through the second opening during the water filling process. After sewage enters the valve cavity, the float moves upward, and the long connecting rod pushes the main valve disc to cooperate with the second opening, thus closing the second opening. During the sewage transportation process, gas is released from the sewage and accumulates in the valve cavity. The water level in the valve cavity drops, the float descends and drives the long connecting rod to move downward, and the micro-vent valve disc disengages from the vent hole, causing the vent hole to open and the released gas to be discharged through the vent hole. When the pipeline is vented or burst, negative pressure is generated in the pipeline, the float falls, and drives the main valve disc to separate from the second opening, opening the second opening and allowing the air valve to draw in air.

[0021] (2) The sewage air valve of this utility model is fixedly connected to the main valve disc by the valve disc connecting seat. The micro-discharge valve disc is slidably set relative to the connecting frame. When the micro-discharge sewage releases gas, the long connecting rod drives the micro-discharge valve disc to move up and down. Under the guidance and limitation of the connecting frame, the micro-discharge valve disc is connected or separated from the micro-discharge valve seat, thereby corresponding to the opening and closing of the exhaust port.

[0022] (3) The sewage air valve of this utility model is equipped with a micro-discharge valve seat. The micro-discharge valve disc is connected to or separated from the micro-discharge valve seat to correspond to the opening and closing of the exhaust hole, thereby improving the sealing and closing effect of the exhaust hole.

[0023] (4) In the sewage air valve of this utility model, one end of the guide rod is connected to the main valve disc, and a connecting guide seat is slidably sleeved on the guide rod. The guide seat is fixed relative to the valve cover. When the float moves up and down, it simultaneously drives the long connecting rod, the main valve disc and the guide rod to move. The guide seat guides the guide rod to avoid the main valve disc from deflecting. Attached Figure Description

[0024] Figure 1 This is a schematic cross-sectional view of a wastewater air valve;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0027] Label Explanation:

[0028] 1. Valve body; 11. First opening; 12. Float; 121. Connecting sleeve; 13. Long connecting rod; 14. Main valve disc; 141. Valve disc connecting seat; 142. Vent hole; 15. Guide rod; 151. Guide rod through hole; 16. Connecting frame; 17. Micro-discharge valve seat; 18. Micro-discharge valve disc; 19. Plug; 2. Valve cover; 21. Second opening; 22. Valve seat; 23. Main sealing ring; 24. Guide bracket; 25. Guide seat; 3. Filter screen; 4. Protective cover. Detailed Implementation

[0029] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0030] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0031] Furthermore, the terms such as "upper," "lower," "left," "right," "inner," "outer," and "middle" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model. In addition to indicating orientation or positional relationships, some of the aforementioned terms may also have other meanings. For example, the term "upper" may, in certain circumstances, indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] This embodiment provides a sewage air valve, installed in a sewage pipeline system. It is primarily used for large-scale air venting when the pipeline is filled with water, for large-scale air intake when the pipeline is vented or bursts, and for micro-venting of gases released from the sewage during pipeline operation. Simultaneously, after the pipeline is filled with water, sewage enters the valve chamber; it is also necessary to prevent sewage from overflowing into the second opening of the air valve and contaminating the valve port, thus affecting the air valve's operation.

[0033] Specifically, such as Figure 1 As shown, the wastewater air valve includes a valve body 1, within which a valve cavity is formed. A second opening 21 and a first opening 11, communicating with the valve cavity, are respectively provided on the upper and lower sides of the valve body 1. Preferably, a valve cover 2 is sealed to the upper side of the valve body 1, and the second opening 21 is formed on the valve cover 2. An O-ring is also provided between the valve cover 2 and the valve body 1 to seal the connection between them.

[0034] The valve chamber contains a float 12 that can float up and down, and a main valve disc 14 connected to the float 12 via a long connecting rod 13. Sewage in the pipeline enters the valve chamber through the first opening 11, and the float 12 floats up and down under the action of buoyancy. During the floating process, the float 12 drives the main valve disc 14 to move along the axial direction of the valve chamber via the long connecting rod 13. The main valve disc 14 is arc-shaped and is part of a spherical body. The arc surface on the upper side of the main valve disc 14 can cooperate with the second opening 21 to close and open the second opening 21.

[0035] During the water filling process of the air valve, a large amount of air is released through the second opening 21. After filling, sewage enters the valve cavity, causing the float 12 to move upward. The float 12 then moves the main valve disc 14 closer to the second opening 21. During this process, sewage continues to enter, and the float 12 further drives the main valve disc 14 to cooperate with the second opening 21, promptly closing the second opening. The length of the long connecting rod 13 must be sufficient to prevent sewage from overflowing to the main valve disc 14 and the second opening 21. The sewage only controls the float 12's movement, and the long connecting rod 13 controls whether the main valve disc 14 cooperates with the second opening 21. This prevents oil and other substances in the sewage from contaminating the main valve disc 14 and the second opening 21, thus avoiding air valve failure.

[0036] Combination Figure 2 and Figure 3 As shown, the wastewater air valve in this embodiment also includes a connecting frame 16 fixedly disposed relative to the main valve disc 14. Specifically, the connecting frame 16 is located below the main valve disc 14, and the inner side of the connecting frame 16 has a cavity. The main valve disc 14 has an exhaust port 142 communicating with the valve cavity and the outside. One end of the long connecting rod 13 near the main valve disc 14 is movably connected to the connecting frame 16, and this end is also provided with a micro-exhaust valve disc 18. When the float ball 12 floats up and down, it drives the main valve disc 14 to open or close the second opening 21, and can also drive the micro-exhaust valve disc 18 to open or close the exhaust port 142.

[0037] Specifically, during the water filling process, the second opening 21 is used to vent air. After the sewage enters the valve chamber, the float 12 moves upward under the buoyancy of the sewage, and the long connecting rod 13 pushes the main valve disc 14 upward to cooperate with the second opening 21, thereby closing the second opening 21.

[0038] During the pipeline sewage transport process, gas is released from the sewage and accumulates in the valve cavity. As the accumulated gas increases, the water level in the valve cavity drops, causing the float 12 to descend. Simultaneously, the float 12 drives the long connecting rod 13 to move downwards. The long connecting rod 13 moves relative to the connecting frame 16 and, guided by the connecting frame 16, the micro-discharge valve disc 18 at one end of the long connecting rod 13 disengages from the vent hole 142, opening the vent hole 142 and releasing the released gas. The air valve releases a small amount of gas through the vent hole 142. As this gas is released, the water level in the valve cavity rises, causing the float 12 to move upwards. The float 12 then pushes the micro-discharge valve disc 18 to close the vent hole 142 again via the long connecting rod 13. This process is repeated to release the gas released from the sewage through the vent hole 142. The long connecting rod 13 is movably connected to the connecting frame 16. The connecting frame 16 guides and limits the long connecting rod 13 and the micro-discharge valve disc 18, so that the float 12 controls the micro-discharge valve disc 18 to close or open the vent hole 142 in a timely manner according to the gas accumulated in the valve cavity. It should be noted that the up and down movement of the float 12 controls the micro-discharge valve disc 18 to close or open the vent hole 142. The opening and closing of the second opening 21 during micro-discharge depends on the water level in the valve cavity. For example, in some cases, there is more gas released, the water level in the valve cavity drops more, and the float 12 moves down a longer distance. This causes the float 12 to drive the micro-discharge valve disc 18 to open the vent hole 142, and then continue to drive the main valve disc 14 to move down, thus opening the second opening 21.

[0039] Finally, when the pipeline is vented or bursts, negative pressure is generated inside the pipeline, sewage is discharged from the valve chamber of the air valve, the float ball 12 falls, causing the main valve disc 14 to separate from the second opening 21, the second opening 21 opens, and the air valve draws in air to balance the air pressure inside and outside the pipeline.

[0040] To improve the stability of the connection between the long connecting rod 13 and the float 12, a connecting sleeve 121 is installed on the float 12, and the lower end of the long connecting rod 13 is threadedly connected to the connecting sleeve 121 and locked with a nut.

[0041] As a further improvement, a valve disc connecting seat 141 is provided at the center of the main valve disc 14. One end of the valve disc connecting seat 141 extends to the upper side of the main valve disc 14 and connects to the guide rod 15, while the other end connects to the connecting frame 16 and extends through the connecting frame 16 to the inner side of the connecting frame 16. The end of the valve disc connecting seat 141 located inside the connecting frame 16 is also connected to the micro-exhaust valve seat 17. An exhaust port 142 is opened on the valve disc connecting seat 141, a guide rod through hole 151 communicating with one end of the exhaust port 142 is opened in the guide rod 15, and a through hole communicating with the other end of the exhaust port 142 is opened in the micro-exhaust valve seat 17.

[0042] Specifically, the valve disc connecting seat 141 and the guide rod 15 are sealed together. The outer side of the micro-discharge valve seat 17 is threaded to connect with the valve disc connecting seat 141. The axial center of the micro-discharge valve seat 17 is lined with rubber, and a through hole communicating with the exhaust port 142 is formed on the rubber lining. When the valve disc connecting seat 141 is connected to the connecting frame 16, one end of the valve disc connecting seat 141 extends through the connecting frame 16 to the inner side of the connecting frame 16. A locking washer and nut are tightened on this end, thus fixing the connecting frame 16 to the valve disc connecting seat 141.

[0043] Preferably, the micro-discharge valve 18 is slidably disposed relative to the connecting frame 16, with one end of the micro-discharge valve 18 located inside the connecting frame 16 and the other end passing through the connecting frame 16 and connected to the long connecting rod 13. Furthermore, an annular baffle protrudes from the end of the micro-discharge valve 18 located inside the connecting frame 16, and the annular baffle can abut against the inner side of the connecting frame 16. When gas is released from the micro-discharge wastewater, the long connecting rod 13 drives the micro-discharge valve 18 to move up and down. Guided by the connecting frame 16, the micro-discharge valve 18 connects to or separates from the micro-discharge valve seat 17, thereby correspondingly opening and closing the exhaust port 142. The micro-discharge valve seat 17 is lined with rubber. When the micro-discharge valve 18 is connected to the micro-discharge valve seat 17, the micro-discharge valve 18 connects to and presses against the rubber lining, providing a better sealing effect for the exhaust port 142. When the micro-discharge valve 18 moves downward, the annular baffle abuts against the connecting frame 16, thereby limiting the movement of the micro-discharge valve 18.

[0044] In one embodiment, a guide seat 25 is slidably sleeved on the guide rod 15. The guide seat 25 is located at the axial center of the second opening 21 and is fixedly disposed relative to the valve cover 2. Specifically, the guide seat 25 is connected to the valve cover 2 via a guide bracket 24. When the float 12 floats up and down, it simultaneously drives the long connecting rod 13, the main valve disc 14, and the guide rod 15 to move. The guide seat 25 guides the guide rod 15, causing the main valve disc 14 to move along the axial direction of the second opening 21. The upper end of the guide rod 15 passes through the guide seat 25, and a limiting ring is also connected to this end to limit the downward movement of the guide rod 15. A limiting pin is also connected to the upper end of the guide rod 15 to prevent the limiting ring from coming off.

[0045] To ensure the main valve disc 14 can better seal and close the second opening 21, a valve seat 22 is connected to the inner side of the second opening 21, and a main sealing ring 23 is embedded between the valve seat 22 and the inner wall of the second opening 21. When the main valve disc 14 moves upward to engage with the second opening 21, the main valve disc 14 specifically engages with the main sealing ring 23 for a sealing connection. The main sealing ring 23 can be a rubber sealing ring, which the main valve disc 14 can compress to improve the sealing effect.

[0046] In addition, a pressure relief port is provided on one side of the valve body 1, and a plug 19 is installed in the pressure relief port. Under normal use, the plug 19 seals the pressure relief port. When the air valve is being repaired, the plug 19 at the pressure relief port is removed to release the pressure in the valve cavity.

[0047] A protective cover 4 is installed above the second opening 21. The protective cover 4 is fixedly connected to the valve cover 2 by screws, and a filter screen 3 is installed between the protective cover 4 and the valve cover 2. The protective cover 4 is installed to prevent dust from entering the valve and to prevent rainwater from entering the valve when the exhaust valve is installed outdoors. The filter screen 3 has several through holes. On the one hand, the filter screen 3 is used to prevent small animals and flying insects from entering the valve; on the other hand, it is used to prevent dead branches, leaves and other debris from being sucked in when the water supply to the pipeline is stopped and the air valve is drawing in air.

[0048] The terms "installation," "setup," "equipped with," and "connection" used in this application should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0049] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A sewage air valve, comprising a valve body (1), wherein a valve cavity is provided in the valve body (1), and a first opening (11) and a second opening (21) communicating with the valve cavity are respectively provided on the lower side and the upper side of the valve body (1); Its features are: The valve chamber is provided with a float (12) that can float up and down and a main valve disc (14) connected to the float (12) by a long connecting rod (13); It also includes a connecting frame (16) fixedly arranged relative to the main valve disc (14), an exhaust hole (142) communicating with the valve chamber and the outside on the main valve disc (14), and a micro exhaust valve disc (18) is provided at one end of the long connecting rod (13) near the main valve disc (14). When the float (12) floats up and down, it drives the main valve disc (14) to open or close the second opening (21), and can also drive the micro exhaust valve disc (18) to open or close the exhaust hole (142).

2. The wastewater air valve according to claim 1, characterized in that: A valve connecting seat (141) is provided at the center of the main valve disc (14). One end of the valve connecting seat (141) extends to the upper side of the main valve disc (14) and is connected to the guide rod (15). The other end is connected to the connecting frame (16) and extends through the connecting frame (16) to the inner side of the connecting frame (16).

3. The wastewater air valve according to claim 2, characterized in that: The valve disc connecting seat (141) is located on the inner side of the connecting frame (16) and is also connected to the micro-discharge valve seat (17).

4. The sewage air valve according to claim 3, characterized in that: The exhaust port (142) is opened on the valve disc connecting seat (141), and a guide rod through hole (151) communicating with one end of the exhaust port (142) is opened in the guide rod (15), and a through hole communicating with the other end of the exhaust port (142) is opened in the micro exhaust valve seat (17).

5. The sewage air valve according to any one of claims 2-4, characterized in that: The micro-discharge valve (18) is slidably disposed relative to the connecting frame (16). One end of the micro-discharge valve (18) is located inside the connecting frame (16), and the other end passes through the connecting frame (16) and is connected to the long connecting rod (13).

6. The sewage air valve according to claim 5, characterized in that: The micro-discharge valve (18) is located on the inner side of the connecting frame (16) and an annular baffle is protruding from one end. The annular baffle can abut against the inner side of the connecting frame (16).

7. The wastewater air valve according to claim 2, characterized in that: The valve body (1) is sealed to the upper side of the valve cover (2), and the second opening (21) is opened on the valve cover (2).

8. The sewage air valve according to claim 7, characterized in that: A connecting guide seat (25) is slidably sleeved on the guide rod (15). The guide seat (25) is located at the axial center of the second opening (21) and is fixedly set relative to the valve cover (2).

9. The wastewater air valve according to claim 7, characterized in that: A valve seat (22) is connected to the inner side of the second opening (21). A main sealing ring (23) is embedded between the valve seat (22) and the inner wall of the second opening (21). The main sealing ring (23) can cooperate with the main valve disc (14) for sealing connection.

10. The sewage air valve according to claim 8, characterized in that: The guide seat (25) is connected to the valve cover (2) via the guide bracket (24).

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