Air valve

Abstract

The utility model relates to the technical field of water conveying pipeline systems, and discloses an air valve which comprises an air suction valve and an exhaust valve, the air suction valve comprises a first valve body and an air suction valve clack, a first valve cavity is formed in the first valve body, the first valve body is provided with a valve connector and an air suction hole which are communicated with the first valve cavity, and the air suction valve clack is arranged at the air suction hole; the exhaust valve comprises a second valve body, a floating body valve element and a throttling valve clack, a second valve cavity and an exhaust channel which are communicated with each other are formed in the second valve body, the second valve cavity is communicated with the first valve cavity, a ventilation hole is formed in the upper end of the exhaust channel, and the caliber of the ventilation hole is smaller than that of the valve connector and that of the air suction hole. The air suction valve with the larger-diameter air suction hole can suck a large amount of air when negative pressure is generated in a pipeline to eliminate the negative pressure so as to prevent a pipe from being exploded, meanwhile, the opening degree of the exhaust valve can be automatically adjusted during exhausting, valve closing water hammers caused by blowing blocking in advance due to too high water filling and exhausting speed can be prevented, and bridging water hammers generated when water columns are bridged can be prevented and controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of water delivery pipeline systems, and more specifically, to an air valve. Background Art

[0002] Air valves are used in pipeline systems to exhaust air during water filling, inhale air when negative pressure is generated in the pipeline, and expel small amounts of air released from the water during normal operation. To achieve these functions, conventional air valves typically employ a structure that combines three functions: large-volume exhaust, large-volume intake, and small-volume exhaust. This is known as a compound air valve.

[0003] However, the air intake and exhaust ports of the compound air valve are shared, that is, the air intake and exhaust ports are the same. In most cases, a large amount of air is required when the pipeline is under negative pressure. If the diameter is not enough, it will not be possible to respond quickly to eliminate the negative pressure. When filling and exhausting with water, if the diameter is too large, the water filling speed will be too fast and it will easily cause valve closing water hammer. At the same time, it is impossible to adjust and control the water filling and exhaust speed, and it is impossible to artificially reserve air bags to prevent and control water hammer, which makes it difficult to meet the scenarios that require pressurized water filling. Utility Model Content

[0004] The utility model provides an air valve, which solves the problem that the existing composite exhaust valve is difficult to have the performance of large-scale air intake and anti-water hammer throttling exhaust at the same time.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0006] An air valve comprising:

[0007] An air intake valve, the air intake valve comprising a first valve body and an air intake valve flap, the first valve body having a first valve cavity therein, the first valve body being provided with a valve interface and an air intake orifice respectively communicated with the first valve cavity, the air intake valve flap being provided at the air intake orifice, the air intake valve flap being used to close the air intake orifice when the pressure inside the first valve cavity is greater than the external atmospheric pressure, and to open the air intake orifice when the pressure in the first valve cavity is less than the external atmospheric pressure;

[0008] 20. The air intake valve of claim 19, wherein the at least one air intake duct is connected to the at least one air intake duct of the second control valve. The at least one air intake duct is connected to the at least one air intake duct of the second control valve.

[0009] As a further improvement, the intake valve flap includes a first valve flap, a pull rod and a first elastic member, one end of the pull rod is connected to the first valve flap, a first bracket is provided at the intake port of the first valve body, the pull rod is movably connected to the first bracket, and the first elastic member is connected to the pull rod and applies an upward elastic force to the pull rod.

[0010] As a further improvement, the air intake valve further includes a first dust cover, which is connected to the first valve body and covers the air intake opening.

[0011] As a further improvement, the float valve core includes a lower float and an upper valve disc placed on the top of the lower float, the upper valve disc is provided with a first micro-exhaust orifice, and the lower float blocks the first micro-exhaust orifice when it abuts against the upper valve disc.

[0012] As a further improvement, the throttle valve flap includes a second valve flap and a second elastic member, the second elastic member is connected to the second valve flap and applies a downward elastic force to the second valve flap, and the inner diameter of the exhaust channel gradually increases from the vent opening downward.

[0013] As a further improvement, the second valve body is connected to one side of the first valve body through a first connecting pipe, and the second valve cavity is communicated with the first valve cavity through the first connecting pipe.

[0014] As a further improvement, the exhaust valve further includes a second dust cover, which is connected to the second valve body and covers the vent opening.

[0015] As a further improvement, the air valve also includes a micro-exhaust valve connected to one side of the second valve body, the micro-exhaust valve includes a third valve body and a micro-exhaust valve core, a third valve cavity is provided inside the third valve body, the third valve cavity is connected to the first valve cavity, a second micro-exhaust orifice is provided on the top of the third valve body, the micro-exhaust valve core is provided in the third valve cavity and is used to open and close the second micro-exhaust orifice.

[0016] As a further improvement, the micro-exhaust valve core includes a float, a connecting rod assembly and a third valve disc. The float is connected to the third valve disc through the connecting rod assembly. The connecting rod assembly is installed on the inner wall of the third valve chamber. When the float descends, the third valve disc is driven by the connecting rod assembly to open the second micro-exhaust orifice. When the float rises, the third valve disc is driven by the connecting rod assembly to close the second micro-exhaust orifice.

[0017] As a further improvement, the third valve body is connected to one side of the first valve body through a second connecting pipe, and the third valve cavity is communicated with the first valve cavity through the second connecting pipe.

[0018] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0019] The air valve of the utility model has an intake valve with a larger diameter intake orifice, which can inhale a large amount of air to eliminate the negative pressure to prevent the pipe from bursting when negative pressure is generated in the pipeline. It also has an exhaust valve that can automatically adjust the opening when exhausting. When filling and exhausting with water, the throttle valve disc responds to the change of exhaust pressure and automatically adjusts the flow area of ​​the exhaust channel. It can prevent premature blockage and valve closing water hammer caused by excessively fast water filling and exhaust speed, and can also prevent and control the bridging water hammer caused by the bridging of water columns, with high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a first embodiment of the air valve in the embodiment;

[0021] Figure 2 This is a structural diagram of a second embodiment of the air valve in the embodiment;

[0022] Figure 3 Schematic diagram of the structure of the exhaust valve in the embodiment;

[0023] Figure 4 Schematic diagram of the structure of the micro exhaust valve in the embodiment;

[0024] Figure 5 Schematic diagram of the structure of the third embodiment of the air valve in the embodiment.

[0025] Description of labels:

[0026] 1-intake valve, 11-first valve body, 111-first bracket, 12-intake valve disc, 121-first valve disc, 122-pull rod, 123-first elastic member, 13-first valve chamber, 14-valve interface, 15-intake orifice, 16-first dust cover;

[0027] 2-exhaust valve, 21-second valve body, 211-valve seat, 212-second bracket, 213-guide tube, 22-floating valve core, 221-lower float, 222-upper valve disc, 223-first trace exhaust orifice, 224-guide rod, 23-throttle valve disc, 231-second valve disc, 232-second elastic member, 24-second valve chamber, 25-exhaust channel, 251-vent opening, 26-second dust cover;

[0028] 3-micro exhaust valve, 31-third valve body, 32-micro exhaust valve core, 321-float, 322-connecting rod assembly, 323-third valve disc, 33-third valve chamber, 34-second micro exhaust orifice;

[0029] 4-first connecting pipe; 5-second connecting pipe. DETAILED DESCRIPTION

[0030] 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.

[0031] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0032] At the same time, the terms such as "upper", "lower", "left", "right", and "middle" cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered as the scope of implementation of this utility model. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0033] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0034] Reference Figure 1 This embodiment provides an air valve of a first embodiment, which includes an air intake valve 1, an air exhaust valve 2 and a micro-exhaust valve 3. Figure 2 As shown, a second embodiment of an air valve is also provided. The air valve includes an intake valve 1 and an exhaust valve 2 . The second embodiment differs from the first embodiment only in that the air valve 3 is not provided.

[0035] When the air valve is applied to a pipeline, the main function of the air intake valve 1 is to inhale air when negative pressure is generated in the pipeline, thereby eliminating the negative pressure in the pipeline; the exhaust valve 2 can both exhaust and inhale air, but exhaust is the main function, which can be used to exhaust when the pipeline is filled with water, and to exhaust when the water column in the pipeline is bridged; the trace exhaust valve 3 is used to discharge a small amount of accumulated air during normal operation of the pipeline.

[0036] Reference Figure 1-5 The intake valve 1 of this embodiment includes a first valve body 11 and an intake valve disc 12. The first valve body 11 defines a first valve cavity 13. The first valve body 11 is provided with a valve interface 14 and an intake orifice 15, each of which communicates with the first valve cavity 13. The intake valve disc 12 is disposed at the intake orifice 15. The intake valve disc 12 is configured to close the intake orifice 15 when the pressure inside the first valve cavity 13 is greater than the external atmospheric pressure, and to open the intake orifice 15 when the pressure inside the first valve cavity 13 is less than the external atmospheric pressure.

[0037] Specifically, the intake valve flap 12 includes a first valve flap 121, a pull rod 122 and a first elastic member 123. One end of the pull rod 122 is connected to the first valve flap 121. A first bracket 111 is provided at the intake orifice 15 of the first valve body 11. The pull rod 122 is movably connected to the first bracket 111. The first elastic member 123 is connected to the pull rod 122 and applies an upward elastic force to the pull rod 122. The first elastic member 123 is a pressure spring mounted on the pull rod 122, and the first elastic member 123 is located between the upper end of the pull rod 122 and the first bracket 111. The first elastic member 123 provides upward elastic support for the first valve flap 121, so that the first valve flap 121 is in a normally closed state closing the intake orifice 15 when it is not subject to any force other than the self-gravity of the intake valve flap 12 and the elastic force of the first elastic member 123. The first valve flap 121 forms a sealing pair with the sealing member at the intake orifice 15 to ensure the sealing of the intake orifice 15 when it is closed; and when the pressure in the first valve cavity 13 is lower than the external atmospheric pressure, the atmospheric pressure pushes the first valve flap 121 downward, so that the first valve flap 121 can move downward to open the intake orifice 15, and the intake valve 1 can then inhale air to eliminate the negative pressure in the pipeline.

[0038] In some other embodiments, the intake valve flap 12 may also be installed in other ways. For example, the first elastic member 123 and the pull rod 122 may be disposed below the first valve flap 121, and the first valve flap 121 may be pushed upward by the first elastic member 123. Therefore, as long as the upward elastic force drives the intake valve flap 12 to remain normally closed, and the elastic force can be overcome to open the intake orifice 15 when the pressure in the first valve chamber 13 is lower than the external atmospheric pressure, it should be considered to fall within the scope of protection of the present invention.

[0039] In some embodiments, a first dust cover 16 is connected to the first valve body 11 of the intake valve 1. The first dust cover 16 covers the intake port 15. The first dust cover 16 has a cylindrical filter that can filter external debris to prevent the intake valve 1 from sucking in external debris when inhaling.

[0040] Reference Figure 1 、 Figure 2 and Figure 3The exhaust valve 2 in this embodiment includes a second valve body 21, a float valve core 22 and a throttle valve disc 23. The second valve body 21 has a second valve chamber 24 and an exhaust channel 25 that are interconnected. The upper end of the exhaust channel 25 has a vent opening 251. The diameter of the vent opening 251 is smaller than the diameter of the valve interface 14 and the intake opening 15 of the intake valve 1. The second valve chamber 24 is connected to the first valve chamber 13. Specifically, the second valve body 21 is connected to one side of the first valve body 11 through the first connecting pipe 4, and the second valve chamber 24 and the first valve chamber 13 are connected through the first connecting pipe 4. In other embodiments, the second valve body 21 can also be designed as an integrally formed structure with the first connecting pipe 4 to directly connect the second valve body 21 to the first valve body 11.

[0041] The float valve core 22 is disposed in the second valve chamber 24. The float valve core 22 is used to isolate the second valve chamber 24 from the exhaust passage 25 when the internal pressure of the second valve chamber 24 is greater than the external atmospheric pressure, and to connect the second valve chamber 24 to the exhaust passage 25 when the internal pressure of the second valve chamber 24 is less than the external atmospheric pressure. In this embodiment, the float valve core 22 includes a lower float 221 and an upper valve disc 222 disposed on top of the lower float 221. The lower float 221 can be a hollow float ball, a buoy structure, or a plastic floating structure. To ensure the sealing and stability of the upper valve disc 222, the second valve body 21 has a valve seat 211 disposed between the second valve chamber 24 and the exhaust passage 25. A second bracket 212 is disposed on the valve seat 211. The upper valve disc 222 is movably connected to the second bracket 212 via a guide rod 224. During operation, the float valve core 22 can rise with the rising liquid level in the second valve chamber 24, or fall with the falling liquid level. During the pipeline filling and exhaust process, the pressure inside the second valve chamber 24 is greater than the external atmospheric pressure. As the liquid level rises, the lower float 221 rises, lifting the upper valve disc 222. The upper valve disc 222 forms a sealing pair with the seal on the valve seat 211, thereby isolating the second valve chamber 24 from the exhaust passage 25. At this point, exhaust is complete, and the float valve core 22 prevents liquid leakage from the pipeline. It is worth noting that during normal pipeline operation, gas in the pipeline accumulates in the second valve chamber 24, causing the liquid level to drop. However, at this time, the pressure inside the second valve chamber 24 is still greater than the external atmospheric pressure. The lower float 221 falls due to its own weight and the falling liquid level, but the upper valve disc 222, due to its light weight, remains closed, meaning that the float valve core 22 still maintains its barrier between the second valve chamber 24 and the exhaust passage 25. When negative pressure is generated in the pipeline, the internal pressure of the second valve chamber 24 is lower than the external atmospheric pressure, the lower float 221 falls as the liquid level drops, and the upper valve flap 222 also falls under the downward thrust of the atmospheric pressure and its own gravity, thereby connecting the second valve chamber 24 with the exhaust channel 25, and the exhaust valve 2 inhales air.

[0042] During normal operation of the pipeline, in order to expel a small amount of air accumulated in the second valve chamber 24, in this embodiment, the upper valve disc 222 is further provided with a first micro-exhaust orifice 223. When the lower float 221 abuts against the upper valve disc 222, the first micro-exhaust orifice 223 is blocked. The diameter of the first micro-exhaust orifice 223 is very small. When the lower float 221 descends with the liquid level, the first micro-exhaust orifice 223 opens, and the accumulated air can be discharged from the first micro-exhaust orifice 223. After the gas is discharged, the lower float 221 rises again with the liquid level and recloses the first micro-exhaust orifice 223. The first micro-exhaust orifice 223 provided on the upper valve disc 222 enables the exhaust valve 2 to have a micro-exhaust function, making the function more comprehensive.

[0043] In some other embodiments, referring to Figure 5 , a third embodiment of an air valve is also provided, which differs from the second embodiment only in that the float valve core 22 only includes a lower float 221 but does not have an upper valve flap 222. Accordingly, the float valve core 22 of this embodiment does not have the upper valve flap 222, and the exhaust valve 2 does not have a trace exhaust function.

[0044] In this embodiment, the throttle valve flap 23 of the exhaust valve 2 is arranged in the exhaust channel 25. The throttle valve flap 23 can move with the change of the medium pressure in the second valve chamber 24 to adjust the flow area of ​​the exhaust channel 25. When the medium pressure increases, the flow area of ​​the exhaust channel 25 is reduced. When the medium pressure decreases, the flow area of ​​the exhaust channel 25 is increased. Specifically, the throttle valve disc 23 includes a second valve disc 231 and a second elastic member 232. The second elastic member 232 is connected to the second valve disc 231 and applies a downward elastic force to the second valve disc 231. The second bracket 212 is fixedly connected to the guide tube 213. The second valve disc 231 is movably mounted on the guide tube 213. The second elastic member 232 is a pressure spring and is mounted on the guide tube 213. The lower end of the second elastic member 232 abuts the second valve disc 231, and the upper end of the second elastic member 232 abuts the upper end of the guide tube 213. Alternatively, the upper end of the second elastic member 232 may abut the second dust cover 26 provided on the top of the second valve body 21. The inner diameter of the exhaust passage 25 gradually increases downward from the vent opening 251.

[0045] When the exhaust valve 2 is in the process of filling and exhausting water in the pipeline, or in the process of bridging and exhausting water columns, the greater the pressure of water and gas, the faster the speed of filling and exhausting water will be, which may cause closing water hammer, and the second elastic member 232 applies a downward elastic force to the throttle valve flap 23. When the gas pushes the second valve flap 231 upward, the elastic force exerted on the second valve flap 231 can offset part of the thrust of the airflow, and as the airflow pressure changes, the elastic force of the second elastic member 232 also changes to achieve dynamic balance. The greater the airflow pressure, the more the second valve flap 231 moves upward. During the upward movement of the second valve flap 231, the inner diameter of the exhaust channel 25 gradually increases from the vent hole 251 downward, the flow area of ​​the exhaust channel 25 will gradually decrease, thereby generating a throttling effect and reducing the speed of water filling and exhausting water, so that the exhaust valve 2 can prevent closing water hammer and bridging water hammer.

[0046] In some embodiments, a second dust cover 26 is connected to the second valve body 21 of the exhaust valve 2. The second dust cover 26 covers the vent opening 251. The second dust cover 26 also has a cylindrical filter to filter external debris and prevent the external debris from being sucked in.

[0047] Reference Figure 1 and Figure 4 In this embodiment, the micro-exhaust valve 3 is connected to one side of the first valve body 11 of the intake valve 1. Specifically, the micro-exhaust valve 3 includes a third valve body 31 and a micro-exhaust valve core 32. A third valve cavity 33 is provided inside the third valve body 31. The third valve cavity 33 is connected to the first valve cavity 13. The third valve body 31 is connected to one side of the second valve body 21 via a second connecting pipe 5. The third valve cavity 33 and the first valve cavity 13 are connected via the second connecting pipe 5. The third valve body 31 can also be designed as a structure similar to being integrally formed with the second connecting pipe 5, directly connecting the third valve body 31 to the second valve body 21. A second micro-exhaust orifice 34 is provided at the top of the third valve body 31. The micro-exhaust valve core 32 is disposed in the third valve cavity 33 and is used to open and close the second micro-exhaust orifice 34. The micro-exhaust valve core 32 includes a float 321, a connecting rod assembly 322 and a third valve flap 323. The float 321 is connected to the third valve flap 323 through the connecting rod assembly 322. The connecting rod assembly 322 is installed on the inner wall of the third valve chamber 33. When the float 321 descends, the third valve flap 323 is driven by the connecting rod assembly 322 to open the second micro-exhaust orifice 34. When the float 321 rises, the third valve flap 323 is driven by the connecting rod assembly 322 to close the second micro-exhaust orifice 34.

[0048] The air valve of this embodiment has no limit on the number of micro exhaust valves 3, and no limit on the specific structural form of the micro exhaust valve 3. Other micro exhaust valves 3 in the prior art can also be used. The main function of the micro exhaust valve 3 is to exhaust during the normal operation of the pipeline. Increasing the number of micro exhaust valves 3 can improve the exhaust capacity of the air valve, but it will also increase the cost of use. The choice can be made according to the actual working conditions. Figure 1 The air valve in the first embodiment shown in the figure is provided with a micro exhaust valve 3 and an exhaust valve 2 with a micro exhaust function, and the exhaust capacity during the normal operation of the pipeline is relatively good. Figure 2 In the second embodiment of the air valve, since the float valve core 22 of the exhaust valve 2 has the first micro exhaust orifice 223, whether to set the micro exhaust valve 3 as the air valve of the first embodiment is optional. Figure 5 In the third embodiment of the air valve, since the float valve core 22 of the exhaust valve 2 does not have the first trace exhaust orifice 223, it is usually better to set the trace exhaust valve 3. Of course, the trace exhaust valve 3 may not be set.

[0049] In summary, according to the air valve of this embodiment, its intake valve 1 and exhaust valve 2 play their respective functions in application, and the overall intake and exhaust performance is more comprehensive and superior than the composite exhaust valve in the prior art. Specifically, the intake valve 1 has a larger-diameter intake orifice 15, which can inhale a large amount of air to eliminate the negative pressure when negative pressure is generated in the pipeline to prevent the pipe from bursting; the exhaust valve 2 has a throttle valve flap 23. When filling and exhausting water, the throttle valve flap 23 responds to the change in exhaust pressure and can automatically adjust the flow area of ​​the exhaust channel 25 to prevent premature blockage and valve closing water hammer caused by excessive water filling and exhaust speed, and can also prevent and control the water hammer caused by bridging when the water column is bridged, with high safety; the air valve also has the function of exhausting when the pipeline is operating normally through the micro-exhaust valve 3 and the exhaust valve 2, with comprehensive functions and better performance.

[0050] The terms "installed," "disposed," "equipped with," and "connected" as used herein should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] 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. An air valve, characterized in that: include: An air intake valve (1), the air intake valve (1) comprising a first valve body (11) and an air intake valve flap (12), the first valve body (11) having a first valve cavity (13) therein, the first valve body (11) being provided with a valve interface (14) and an air intake orifice (15) respectively connected to the first valve cavity (13), the air intake valve flap (12) being provided at the air intake orifice (15), the air intake valve flap (12) being used to close the air intake orifice (15) when the pressure inside the first valve cavity (13) is greater than the external atmospheric pressure, and to open the air intake orifice (15) when the pressure inside the first valve cavity (13) is less than the external atmospheric pressure; An exhaust valve (2), the exhaust valve (2) comprising a second valve body (21), a float valve core (22) and a throttle valve disc (23), the second valve body (21) having a second valve cavity (24) and an exhaust channel (25) that are interconnected, the second valve cavity (24) being connected to the first valve cavity (13), the upper end of the exhaust channel (25) having a vent opening (251), the diameter of the vent opening (251) being smaller than the diameter of the valve interface (14) and the suction opening (15); the float valve core (22) being arranged in the second valve cavity (24), the float valve core (22) being used for venting the second valve cavity (24) when the internal pressure is greater than the external pressure. When the pressure of the medium in the second valve chamber (24) is less than the atmospheric pressure, the second valve chamber (24) is separated from the exhaust passage (25); when the pressure inside the second valve chamber (24) is less than the external atmospheric pressure, the second valve chamber (24) is connected to the exhaust passage (25); the throttle valve flap (23) is arranged in the exhaust passage (25), and the throttle valve flap (23) can move with the change of the medium pressure in the second valve chamber (24) to adjust the flow area of ​​the exhaust passage (25), and when the medium pressure increases, the flow area of ​​the exhaust passage (25) is reduced, and when the medium pressure decreases, the flow area of ​​the exhaust passage (25) is increased.

2. The air valve according to claim 1, characterized in that: The intake valve flap (12) includes a first valve flap (121), a pull rod (122) and a first elastic member (123), one end of the pull rod (122) is connected to the first valve flap (121), a first bracket (111) is provided at the intake port (15) of the first valve body (11), the pull rod (122) is movably connected to the first bracket (111), and the first elastic member (123) is connected to the pull rod (122) and applies an upward elastic force to the pull rod (122).

3. The air valve according to claim 1, characterized in that: The air intake valve (1) further comprises a first dust cover (16), wherein the first dust cover (16) is connected to the first valve body (11) and covers the air intake opening (15).

4. The air valve according to claim 1, characterized in that: The float valve core (22) comprises a lower float (221) and an upper valve flap (222) placed on the top of the lower float (221); the upper valve flap (222) is provided with a first micro-exhaust orifice (223); and the first micro-exhaust orifice (223) is blocked when the lower float (221) abuts against the upper valve flap (222).

5. The air valve according to claim 1, characterized in that: The throttle valve flap (23) comprises a second valve flap (231) and a second elastic member (232); the second elastic member (232) is connected to the second valve flap (231) and applies a downward elastic force to the second valve flap (231); the inner diameter of the exhaust passage (25) gradually increases downward from the vent opening (251).

6. The air valve according to claim 1, characterized in that: The second valve body (21) is connected to one side of the first valve body (11) via a first connecting pipe (4), and the second valve cavity (24) is communicated with the first valve cavity (13) via the first connecting pipe (4).

7. The air valve according to claim 1, characterized in that: The exhaust valve (2) further comprises a second dust cover (26), wherein the second dust cover (26) is connected to the second valve body (21) and covers the vent hole (251).

8. The air valve according to any one of claims 1 to 7, characterized in that: The invention also includes a micro exhaust valve (3) connected to one side of the second valve body (21), the micro exhaust valve (3) including a third valve body (31) and a micro exhaust valve core (32), a third valve cavity (33) is provided inside the third valve body (31), the third valve cavity (33) is communicated with the first valve cavity (13), a second micro exhaust orifice (34) is provided on the top of the third valve body (31), the micro exhaust valve core (32) is provided in the third valve cavity (33) and is used to open and close the second micro exhaust orifice (34).

9. The air valve according to claim 8, characterized in that: The micro-exhaust valve core (32) comprises a float (321), a connecting rod assembly (322) and a third valve flap (323); the float (321) is connected to the third valve flap (323) via the connecting rod assembly (322); the connecting rod assembly (322) is mounted on the inner wall of the third valve cavity (33); when the float (321) descends, the third valve flap (323) is driven by the connecting rod assembly (322) to open the second micro-exhaust orifice (34); when the float (321) ascends, the third valve flap (323) is driven by the connecting rod assembly (322) to close the second micro-exhaust orifice (34).

10. The air valve according to claim 8, characterized in that: The third valve body (31) is connected to one side of the first valve body (11) via a second connecting pipe (5), and the third valve cavity (33) is communicated with the first valve cavity (13) via the second connecting pipe (5).

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