A sewage composite air inlet and exhaust valve

Abstract

This utility model relates to the field of valve equipment technology, and in particular to a sewage composite inlet and outlet valve with buffered sewage discharge and water hammer prevention, including a valve body, valve cover, outlet cover, outlet hood, outlet assembly, sealing ring, upper sliding sleeve, upper sliding rod, upper limit block, lower sliding sleeve, lower sliding rod, lower limit block, and float ball. The valve body has a valve cavity, and the upper and lower ends of the valve body are respectively provided with an upper opening and a lower opening communicating with the valve cavity. The outlet cover is provided at the upper opening through the valve cover, and the side of the valve cover is provided with an outlet. The outlet hood is provided at the outlet and has an outlet hole. The outlet cover has a first through hole. The upper sliding sleeve is provided on the outlet cover. The upper sliding rod is slidably provided on the upper sliding sleeve. The upper limit block is provided at the upper end of the upper sliding rod. The outlet assembly is provided at the lower end of the upper sliding rod. The sealing ring is provided on the outlet assembly. The outlet assembly and the sealing ring are used to seal the first through hole on the outlet cover.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment technology, and in particular to a sewage composite inlet and outlet valve. Background Technology

[0002] In sewage drainage pipelines, due to the presence of a large amount of gas in the initial stage of water delivery and a trace amount of dissolved gas in the normal water flow, a combined sewage air vent valve installed on the pipeline is required for both large and small-volume air venting. Since these combined air vent valves are often installed at a high position in the pipeline system to facilitate air intake and exhaust, when a large amount of air is generated in the pipeline, the air will continuously flow upwards. The air vent valve, installed at a high position in the pipeline and in the open state, allows a large amount of air to be blown into the bottom of the combined air vent valve from the pipeline, passing through the valve body cavity and exiting from the exhaust port of the air vent valve, thus venting the air from the outside. When the pipe is connected to atmospheric pressure, a negative pressure is formed inside the pipe. Because the external atmospheric pressure is greater than the internal pressure, the exhaust port of the air inlet / exhaust valve opens to allow air in, thereby balancing the internal and external atmospheric pressures and preventing the pipe from becoming unstable and damaged due to negative pressure. At the same time, when the pipe is vented, a large amount of air can be automatically introduced, which speeds up water discharge, shortens water outage time, and improves water delivery or drainage efficiency. However, during the large-scale venting and closing process of the sewage composite air release valve, a large amount of sewage is generated instantaneously sprayed out of the pipeline, and water hammer occurs instantaneously during the closing process. This can easily damage valve components and pipeline accessories, causing environmental pollution in minor cases and safety hazards in severe cases. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model provides a sewage composite inlet and outlet valve with buffered sewage discharge and anti-water hammer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A combined inlet and outlet valve for sewage includes a valve body, a valve cover, an outlet cover, an outlet hood, an outlet assembly, a sealing ring, an upper sliding sleeve, an upper sliding rod, an upper limit block, a lower sliding sleeve, a lower sliding rod, a lower limit block, and a float. The valve body has a valve cavity, with an upper opening and a lower opening communicating with the valve cavity at its upper and lower ends, respectively. The outlet cover is located at the upper opening via the valve cover, and an outlet is located on the side of the valve cover. The outlet hood covers the outlet and has an outlet hole. The vent cap has a first through hole. The upper sliding sleeve is disposed on the vent cap. The upper sliding rod is slidably disposed on the upper sliding sleeve. The upper limit block is disposed at the upper end of the upper sliding rod. The vent assembly is disposed at the lower end of the upper sliding rod. The sealing ring is disposed on the vent assembly. The vent assembly and the sealing ring are used to seal the first through hole on the vent cap. The lower sliding sleeve is disposed on the vent assembly. The lower sliding rod is slidably disposed on the lower sliding sleeve. The lower limit block is disposed at the upper end of the lower sliding rod. The float is disposed at the lower end of the lower sliding rod.

[0006] The exhaust assembly includes a sealing cover, a support base, a movable base, and a sealing block. The support base has a through channel along its central axis, and the side wall of the support base has a slot communicating with the channel. The sealing ring is disposed on the upper end of the support base through the sealing cover, and the sealing cover has a second through hole. The movable base is slidably disposed in the channel, and the sealing block is disposed on the upper end of the movable base, and is used to seal the second through hole on the sealing cover.

[0007] Furthermore, the side wall of the valve body is provided with a connecting pipe that communicates with the valve cavity, and a switch valve is provided on the connecting pipe.

[0008] Furthermore, a lifting ring is threaded onto the valve cover.

[0009] Furthermore, the float assembly includes an upper sphere and a lower sphere, which are connected to form a hollow float assembly.

[0010] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This sewage composite air inlet and outlet valve, through the linkage design of the float, upper sliding sleeve and upper sliding rod, and lower sliding sleeve and lower sliding rod, can automatically adjust the air venting / inlet state when the water level in the pipeline changes, effectively avoiding sewage splashing and water hammer effect. The double limiting structure of the upper sliding rod and lower sliding rod can accurately control the valve opening and closing stroke, reducing mechanical impact. Furthermore, the large and small venting diameter settings formed by the first and second through holes enable multiple venting modes, improving the safety and convenience of use. Specifically, when water begins to be injected into the pipeline, the float, venting assembly, and sealing ring remain in the open position, and the first through hole... The first through hole and the second through hole connect the valve chamber to the outside for venting. When the air is vented, water enters the valve chamber, which lifts the auxiliary ball, causing the sliding rod to move the movable seat upward. This causes the sealing block to seal the second through hole, and simultaneously causes the sealing cover and sealing ring to rise, thus sealing the first through hole and isolating the valve chamber from the outside. When the water level in the pipeline is normal, a small amount of air accumulates in the valve chamber, creating a certain pressure. The water level in the valve chamber drops, and the float moves down slightly with the liquid level, causing the movable seat to descend. This causes the sealing block to separate from the second through hole, opening the second through hole and releasing a small amount of gas, allowing the liquid level to return to normal. This cycle repeats, achieving automatic adjustment of the venting / intake state. Attached Figure Description

[0011] Fig. 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0012] Fig. 2 This is a partially exploded structural diagram of an embodiment of the present utility model;

[0013] Fig. 3 This is an exploded structural diagram of an embodiment of the present invention;

[0014] Fig. 4 This is a cross-sectional structural diagram of an embodiment of the present utility model. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] The embodiment of this utility model is as follows:

[0017] refer to Figs. 1 to 4 As shown, a combined inlet and outlet valve for sewage includes a valve body 1, a valve cover 2, an outlet cover 3, an outlet hood 4, an outlet assembly 5, a sealing ring 6, an upper sliding sleeve 7, an upper sliding rod 8, an upper limit block 9, a lower sliding sleeve 10, a lower sliding rod 11, a lower limit block 12, and a float 13. The valve body 1 has a valve cavity 100. The upper end and lower end of the valve body 1 are respectively provided with an upper opening 15 and a lower opening 16 communicating with the valve cavity 100. The outlet cover 3 is disposed at the upper opening 15 through the valve cover 2. The side of the valve cover 2 is provided with an outlet 20. The outlet hood 4 is disposed over the outlet 20 and is provided with an outlet hole. 40, the exhaust cover 3 has a first through hole 30, the upper sliding sleeve 7 is disposed on the exhaust cover 3, the upper sliding rod 8 is slidably disposed on the upper sliding sleeve 7, the upper limit block 9 is disposed at the upper end of the upper sliding rod 8, the exhaust assembly 5 is disposed at the lower end of the upper sliding rod 8, the sealing ring 6 is disposed on the exhaust assembly 5, and the exhaust assembly 5 and the sealing ring 6 are used to seal the first through hole 30 on the exhaust cover 3, the lower sliding sleeve 10 is disposed on the exhaust assembly 5, the lower sliding rod 11 is slidably disposed on the lower sliding sleeve 10, the lower limit block 12 is disposed at the upper end of the lower sliding rod 11, and the float ball 13 is disposed at the lower end of the lower sliding rod 11;

[0018] Specifically, the exhaust assembly 5 includes a sealing cover 51, a support base 52, a movable base 53, and a sealing block 54. The support base 52 has a through channel 55 at its central axis, and the side wall of the support base 52 has a slot 56 communicating with the channel 55. The sealing ring 6 is disposed on the upper end of the support base 52 through the sealing cover 51. The sealing cover 51 has a second through hole 60. The movable base 53 is slidably disposed in the channel 55. The sealing block 54 is disposed on the upper end of the movable base 53 and is used to seal the second through hole 60 on the sealing cover 51. The lower end of the upper sliding rod 8 is hinged to the second through hole 60 on the sealing cover 51 and is clearance-fitted with the second through hole 60 to facilitate gas discharge.

[0019] This combined sewage inlet and outlet valve, through the linkage design of the float 13 with the upper sliding sleeve 7 and upper sliding rod 8, and the lower sliding sleeve 10 and lower sliding rod 11, can automatically adjust the venting / inlet state when the water level in the pipeline changes, effectively avoiding sewage splashing and water hammer effect. The double limiting structure of the upper sliding rod 8 and lower sliding rod 11 can accurately control the valve opening and closing stroke, reducing mechanical impact. Furthermore, the large and small venting hole settings formed by the first through hole 30 and the second through hole 60 enable multiple venting modes, improving the safety and convenience of use. Specifically, when water begins to be injected into the pipeline, the float 13, the venting assembly 5, and the sealing ring 6 remain in the open position, allowing the valve cavity 100 to communicate with the outside through the first through hole 30 and the second through hole 60. When the air is exhausted, water enters the valve chamber 100, which lifts the float 13, causing the sliding rod 11 to drive the movable seat 53 to rise, causing the sealing block 54 to seal the second through hole 60. At the same time, the sealing cover 51 and the sealing ring 6 rise, thereby sealing the first through hole 30, thus isolating the valve chamber 100 from the outside. When the water level in the pipeline is normal, a small amount of air accumulates in the valve chamber 100, forming a certain pressure. The water level in the valve chamber 100 drops, and the float 13 drops slightly with the liquid level, thereby driving the movable seat 53 to drop, causing the sealing block 54 to separate from the second through hole 60, realizing the opening of the second through hole 60, and a small amount of gas is discharged, allowing the liquid level to recover. This cycle repeats, realizing automatic adjustment of the exhaust / intake state.

[0020] Furthermore, the side wall of the valve body 1 is provided with a connecting pipe 17 that communicates with the valve cavity 100. A switch valve 18 is provided on the connecting pipe 17. The addition of the connecting pipe 17 and the switch valve 18 forms an emergency sewage discharge channel, which can discharge residual sewage in a directional manner during valve maintenance, avoiding secondary pollution caused by direct disassembly. At the same time, a lifting ring 19 is threadedly connected to the valve cover 2. The structure of the lifting ring 19 facilitates high-altitude installation and maintenance, and the threaded connection ensures that the valve body sealing will not be affected during disassembly.

[0021] In this embodiment, the float component 13 includes an upper sphere 131 and a lower sphere 132. The upper sphere 131 and the lower sphere 132 are connected to form a hollow float component 13. The double-body structure of the float component 13 has a larger buoyancy reserve and can still maintain a sensitive response when the solid content of sewage is high. The hollow design reduces the overall weight, reduces the load on the sliding rod, and improves the reliability of the action.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A combined inlet and outlet valve for sewage, characterized in that: The device includes a valve body, a valve cover, an exhaust cover, an exhaust hood, an exhaust assembly, a sealing ring, an upper sliding sleeve, an upper sliding rod, an upper limit block, a lower sliding sleeve, a lower sliding rod, a lower limit block, and a float. The valve body has a valve cavity, with an upper opening and a lower opening communicating with the valve cavity at its upper and lower ends, respectively. The exhaust cover is located at the upper opening via the valve cover, and an exhaust port is located on the side of the valve cover. The exhaust hood is located at the exhaust port and has an exhaust hole. The exhaust cover has a first through hole. The upper sliding sleeve is located on the exhaust cover. The upper sliding rod is slidably located on the upper sliding sleeve. The upper limit block is located at the upper end of the upper sliding rod. The exhaust assembly is located at the lower end of the upper sliding rod. The sealing ring is located on the exhaust assembly and is used to seal the first through hole on the exhaust cover. The lower sliding sleeve is located on the exhaust assembly. The lower sliding rod is slidably located on the lower sliding sleeve. The lower limit block is located at the upper end of the lower sliding rod. The float is located at the lower end of the lower sliding rod. The exhaust assembly includes a sealing cover, a support base, a movable base, and a sealing block. The support base has a through channel along its central axis, and the side wall of the support base has a slot communicating with the channel. The sealing ring is disposed on the upper end of the support base through the sealing cover, and the sealing cover has a second through hole. The movable base is slidably disposed in the channel, and the sealing block is disposed on the upper end of the movable base, and is used to seal the second through hole on the sealing cover.

2. The wastewater composite inlet and outlet valve according to claim 1, characterized in that: The valve body has a connecting pipe on its side wall that communicates with the valve cavity, and a switch valve is provided on the connecting pipe.

3. The wastewater composite inlet and outlet valve according to claim 2, characterized in that: The valve cover is threaded with a lifting ring.

4. The combined inlet and outlet valve for sewage according to claim 1, characterized in that: The float assembly includes an upper sphere and a lower sphere, which are connected to form a hollow float assembly.

Images