Air valve

Abstract

The utility model relates to the technical field of valves, and discloses an air valve which comprises a valve body, an adjusting structure and a first filtering piece, a first valve cavity is formed in the valve body, the valve body is provided with a valve inlet and a valve outlet, the valve inlet communicates with the valve outlet through the first valve cavity, the adjusting structure is arranged in the first valve cavity, and the adjusting structure comprises a floater assembly and a protective cylinder. The protection cylinder is fixedly connected with the valve body, the floater assembly is arranged on the side, away from the valve inlet, of the protection cylinder, the floater assembly is movably arranged in the first valve cavity, the floater assembly selectively opens or blocks the valve outlet, the first filtering piece is provided with a plurality of first filtering holes, the first filtering piece is arranged at the valve inlet, and the first filtering piece is fixedly connected with the protection cylinder. Therefore, by arranging the first filtering piece, the risk that the air valve is blocked is reduced, safe operation of the water conveying pipeline is guaranteed, meanwhile, the first filtering piece is fixedly connected with the protective cylinder in the valve body, and the sealing performance of the connecting position of the air valve and the water conveying pipeline cannot be affected.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more particularly to an air valve. Background Technology

[0002] Air valves, as important pressure regulating and gas venting devices in pipeline systems, are widely used in water conservancy projects, HVAC systems, and industrial fluid control.

[0003] In related technologies, traditional air valves mostly use a float structure to achieve automatic gas discharge and sealing. However, when there are many impurities such as fine sand and dead branches in the water pipeline, the air valve is often blocked, which leads to weakened performance or failure of the air valve, posing a safety hazard to the water pipeline. Utility Model Content

[0004] This application provides an air valve that solves the technical problem of air valves being easily clogged by impurities, reduces the risk of air valve performance degradation or failure, and ensures the safe operation of water pipelines.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide an air valve, comprising:

[0007] The valve body has a first valve chamber, a valve inlet and a valve outlet, and the valve inlet is connected to the valve outlet through the first valve chamber.

[0008] The regulating structure is located inside the first valve chamber. The regulating structure includes a float assembly and a protective sleeve. The protective sleeve is fixedly connected to the valve body. The float assembly is located on the side of the protective sleeve away from the valve inlet. The float assembly is movably located inside the first valve chamber. The float assembly selectively opens or blocks the valve outlet.

[0009] The first filter element has multiple first filter holes, is located at the valve inlet, and is fixedly connected to the protective sleeve.

[0010] According to the air valve proposed in the embodiments of this application, by setting a first filter element at the valve inlet of the valve body, impurities can be filtered from the medium flowing into the air valve, thereby reducing the risk of the air valve being blocked and avoiding problems such as performance weakening or failure of the air valve, ensuring the safe operation of the water supply pipeline. At the same time, compared with the traditional air valve that clamps the filter screen at the valve inlet, this application fixes the first filter element to the protective sleeve in the valve body, which will not affect the sealing performance at the connection between the air valve and the water supply pipeline.

[0011] Optionally, the first filter element is constructed as a filter plate, with the outer peripheral surface of the filter plate fitting against the inner peripheral surface of the valve inlet.

[0012] Optionally, the air valve further includes: a second filter element having a plurality of second filter holes, the second filter element being fixedly connected between the protective sleeve and the first filter element;

[0013] The second filter element is arranged around the circumference of the protective casing so that the first filter element, the second filter element, and the protective casing together form a filtration space.

[0014] Optionally, the second filter element is constructed as a frustum filter structure.

[0015] Optionally, the outer surface of the casing is provided with a first mounting part, and the outer peripheral surface of the second filter element is provided with a second mounting part that mates with the first mounting part. The first mounting part and the second mounting part are screwed together and fixed.

[0016] Optionally, the valve body is provided with a cleaning port, which communicates with the first valve chamber;

[0017] The air valve also includes a sealing element and an inlet pipe. The inlet pipe is connected to the cleaning port, and the sealing element is located in the inlet pipe. The sealing element can selectively block or open the inlet pipe.

[0018] Optionally, the float assembly includes a float and a valve disc, the float being located on the side of the valve disc away from the valve outlet, and the float being adapted to push the valve disc toward the valve outlet so as to block the valve outlet.

[0019] Optionally, the air valve further includes: a valve cover, the valve cover including a housing, a second valve chamber formed inside the housing, the second valve chamber communicating with the first valve chamber through a valve outlet, the housing also having an exhaust port, the second valve chamber communicating with the outside through the exhaust port.

[0020] Optionally, a micro-venting channel is provided on the valve disc. When the float separates from the valve disc, the first valve chamber is connected to the outside through the micro-venting channel. When the float contacts the valve disc, the float blocks the micro-venting channel.

[0021] Optionally, the valve cover also includes a third filter element and a protective cover. The third filter element is arranged circumferentially around the housing, and the protective cover is placed on the third filter element. The third filter element has multiple third filter holes, and the exhaust port is connected to the outside through the multiple third filter holes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1A half-sectional schematic diagram of an air valve provided in one embodiment of this application;

[0024] Figure 2 This is a cross-sectional view of an air valve provided in one embodiment of this application.

[0025] [Explanation of Labels in the Attached Image]

[0026] Air valve 100;

[0027] Valve body 1; First valve chamber 11; Valve inlet 12; Valve outlet 13; Cleaning port 14;

[0028] Adjustment structure 2; float assembly 21; valve disc 211; float 212; protective sleeve 22; first mounting part 221; water inlet 222; guide hole 223;

[0029] First filter element 3; First filter hole 31;

[0030] Second filter element 4; Second filter hole 41; Second mounting part 42;

[0031] 5 sealing components;

[0032] Liquid inlet pipe 6;

[0033] Valve cover 7; housing 71; second valve chamber 711; exhaust port 712; third filter element 72; third filter hole 721; protective cover 73;

[0034] First guide post 8; Second guide post 9; Guide shaft 10; Valve seat 20; Sealing ring 30;

[0035] First direction Y. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0038] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0042] It should be noted that air valves, as important pressure regulating and gas venting devices in pipeline systems, are widely used in water conservancy projects, HVAC systems, and industrial fluid control.

[0043] In related technologies, traditional air valves mostly use a float structure to achieve automatic gas discharge and sealing. However, when there are many impurities such as fine sand and dead branches in the water pipeline, the air valve is often blocked, which leads to weakened performance or failure of the air valve, posing a safety hazard to the water pipeline.

[0044] Based on this, this application proposes an air valve 100. By setting a first filter element 3 at the valve inlet 12 of the valve body 1, impurities can be filtered from the medium flowing into the air valve 100, thereby reducing the risk of the air valve 100 being blocked and avoiding problems such as performance degradation or failure of the air valve 100, ensuring the safe operation of the water supply pipeline. At the same time, compared with the traditional air valve 100 which clamps the filter screen at the valve inlet 12, this application fixes the first filter element 3 to the protective sleeve 22 inside the valve body 1, which will not affect the sealing performance at the connection position between the air valve 100 and the water supply pipeline.

[0045] The air valve 100 proposed in this application is described below with reference to the accompanying drawings.

[0046] like Figure 1 and Figure 2 As shown, the air valve 100 according to an embodiment of this application includes: a valve body 1, an adjusting structure 2, and a first filter element 3. The valve body 1 has a first valve cavity 11, a valve inlet 12, and a valve outlet 13. The valve inlet 12 is connected to the valve outlet 13 through the first valve cavity 11. The adjusting structure 2 is disposed in the first valve cavity 11 and includes a float assembly 21 and a protective sleeve 22. The protective sleeve 22 is fixedly connected to the valve body 1. The float assembly 21 is disposed on the side of the protective sleeve 22 away from the valve inlet 12. The float assembly 21 is movably disposed in the first valve cavity 11 and selectively opens or blocks the valve outlet 13. The first filter element 3 has a plurality of first filter holes 31. The first filter element 3 is disposed at the valve inlet 12 and is fixedly connected to the protective sleeve 22.

[0047] Specifically, the valve body 1 can be made of materials such as cast iron, ductile iron, cast steel, stainless steel, brass, bronze, alloy steel, duplex stainless steel, and engineering plastics, to ensure that the valve body 1 can be used normally in pipeline systems that carry clean water, wastewater, hot water, seawater, or chemical solvents.

[0048] Please refer to Figure 1 and Figure 2 As shown, the valve body 1 of the air valve 100 is provided with a first valve chamber 11. Along the first direction Y, the valve body 1 has a valve inlet 12 and a valve outlet 13 arranged opposite to each other. The valve inlet 12 is used to communicate with the water supply pipeline, and the valve outlet 13 is communicated with the outside. The valve inlet 12 is connected to the valve outlet 13 through the first valve chamber 11. With this arrangement, when the air valve 100 exhausts air, the air in the water supply pipeline is discharged from the valve outlet 13 after passing through the valve inlet 12 and the first valve chamber 11. When the air valve 100 replenishes air, the outside air enters the valve chamber from the valve outlet 13 and then enters the water supply pipeline from the valve inlet 12.

[0049] The first valve chamber 11 is provided with an adjustment structure 2, which includes a float assembly 21 and a protective sleeve 22. The protective sleeve 22 is fixedly connected to the valve body 1, and the fixing installation method includes, but is not limited to, bolt connection, snap-fit, etc. Figure 1 and Figure 2 As shown, along the first direction Y, the float assembly 21 is located on the side of the protective sleeve 22 away from the valve inlet 12, and the float assembly 21 can move up and down along the first direction Y within the first valve chamber 11, so that the float assembly 21 can selectively open or block the valve outlet 13. It can be understood that when the float assembly 21 opens the valve outlet 13, the air valve 100 can exhaust or replenish air, and when the float assembly 21 blocks the valve outlet 13, the air valve 100 stops the exhaust or replenishment function.

[0050] As a concrete example, such as Figure 1 and Figure 2 As shown, along the first direction Y, the end of the protective sleeve 22 away from the valve inlet 12 has an opening. Along the circumference of the valve outlet 13, the protective sleeve 22 is arranged around the valve outlet 13 and fixedly installed on the valve body 1, so that the opening of the protective sleeve 22 is opposite to the valve outlet 13.

[0051] Furthermore, an installation space communicating with the opening is formed inside the casing 22. The float assembly 21 is set in the installation space, ensuring that the float assembly 21 is located on the side of the casing 22 away from the valve inlet 12. Along the first direction Y, the float assembly 21 can move up and down in the installation space. It can be understood that there is a gap between the float assembly 21 and the inner wall of the casing 22, which ensures the mutual movement between the float assembly 21 and the casing 22.

[0052] It should be noted that, in order to ensure that the valve inlet 12 can communicate with the valve outlet 13 through the first valve chamber 11, the side wall of the protective sleeve 22 is also provided with a water inlet hole 222. The water inlet hole 222 communicates with the valve outlet 13 through the installation space. Since the protective sleeve 22 is set inside the first valve chamber 11, the water inlet hole 222 communicates with the valve inlet 12 through the gap between the protective sleeve 22 and the valve body 1. This ensures that after the regulating structure 2 is installed in the first valve chamber 11, the valve inlet 12 can still communicate with the valve outlet 13 through the first valve chamber 11.

[0053] When the air valve 100 vents, the air in the water supply pipeline passes through the valve inlet 12 and the first valve chamber 11 before being discharged from the valve outlet 13. As the air is discharged, water in the water supply pipeline begins to flow from the valve inlet 12 into the first valve chamber 11. Because the protective sleeve 22 has a water inlet hole 222 on its side wall, and there is a gap between the float assembly 21 and the inner wall of the protective sleeve 22, water in the first valve chamber 11 can flow into the installation space from the water inlet hole 222 of the protective sleeve 22. The float assembly 21 then floats upwards under the buoyancy of the water. After the float seal valve outlet 13 is lifted, the air valve 100 completes the venting process. When negative pressure is generated in the water supply pipeline due to drainage, the water in the first valve chamber 11 is discharged along with the water in the water supply pipeline, and the pressure in the first valve chamber 11 drops sharply. If the external pressure is greater than the pressure in the first valve chamber 11, the float assembly 21 descends and opens the valve outlet 13, so that the outside air can enter the valve chamber from the valve outlet 13, and then enter the water supply pipeline from the valve inlet 12, thus realizing the air replenishment function of the air valve 100 and avoiding the water hammer effect in the water supply pipeline.

[0054] It should be noted that water pipelines are currently typically used to transport raw water sources, resulting in a large amount of impurities such as fine sand and dead branches in the pipelines. This often causes the air valve 100 to become clogged, leading to a weakening or failure of the air valve 100's performance and posing a safety hazard to the water pipeline.

[0055] In related technologies, some designers clamp the filter screen at the valve inlet 12. However, due to limitations in size or installation, the filter screen clamped at the valve inlet 12 can easily lead to poor sealing at the connection between the air valve 100 and the pipeline, thus greatly affecting the performance of the air valve 100.

[0056] Based on this, this application provides a first filter element 3 inside the valve inlet 12. The first filter element 3 is fixedly connected to the protective sleeve 22 inside the first valve cavity 11. The first filter element 3 has multiple first filter holes 31, which can be constructed as an array of circular holes. When water in the water supply pipeline enters the first valve cavity 11 through the valve inlet 12, the first filter element 3 can filter impurities from the medium flowing into the air valve 100, preventing excessive impurities from entering the air valve 100, thereby reducing the risk of the air valve 100 being blocked and avoiding problems such as performance degradation or failure of the air valve 100, ensuring the safe operation of the water supply pipeline. At the same time, compared with the traditional air valve 100 which clamps the filter screen at the valve inlet 12, this application fixes the first filter element 3 to the protective sleeve 22 inside the valve body 1, which not only ensures the stable installation of the first filter element 3, but also does not affect the sealing performance at the connection between the air valve 100 and the water supply pipeline, ensuring the normal use of the air valve 100.

[0057] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first filter element 3 is constructed as a filter plate, and the outer peripheral surface of the filter plate is in contact with the inner peripheral surface of the valve inlet 12.

[0058] Specifically, the first filter element 3 can be constructed as a disc-shaped filter plate, and the shape and size of the filter plate match the shape and size of the valve inlet 12. For example, if the valve inlet 12 is a circular hole, the filter plate is a disc-shaped filter plate; if the valve inlet 12 is a square hole, the filter plate is a square disc-shaped filter plate. The specific settings are determined according to the actual situation, and no specific restrictions are made here.

[0059] Furthermore, the outer circumferential surface of the filter plate is in contact with the inner circumferential surface of the valve inlet 12. It can be understood that the outer circumferential surface of the filter plate and the inner circumferential surface of the valve inlet 12 can be completely in contact, or there can be a certain gap. This can prevent excessive impurities from entering the first valve chamber 11 from the gap between the filter plate and the valve inlet 12, which is beneficial to improving the filtration effect of the first filter element 3.

[0060] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the air valve 100 also includes a second filter element 4, which has a plurality of second filter holes 41. The second filter element 4 is fixedly connected between the protective sleeve 22 and the first filter element 3. The second filter element 4 is arranged circumferentially around the protective sleeve 22 so that the first filter element 3, the second filter element 4, and the protective sleeve 22 together form a filter space.

[0061] Specifically, such as Figure 1 and Figure 2 As shown, the second filter element 4 has multiple second filter holes 41. The second filter element 4 is arranged circumferentially around the protective cylinder 22. For example, the second filter element 4 can form a cylindrical filter structure or a square filter structure. Along the first direction Y, the upper end of the second filter element 4 is fixedly connected to the protective cylinder 22, and the lower end of the second filter element 4 is fixedly connected to the first filter element 3, so that the first filter element 3, the second filter element 4, and the protective cylinder 22 together form a filter space. For example, when the second filter element 4 is a cylindrical filter structure, the filter space is cylindrical; when the second filter element 4 is a square filter structure, the filter space is square. When water in the water supply pipeline enters the first valve chamber 11 through the valve inlet 12, some water flows sequentially through the first filter element 3, the filter space, and the second filter element 4. With this arrangement, the combined use of the first filter element 3 and the second filter element 4 can increase the filtration area, thereby achieving a better filtration effect and helping to further prevent the air valve 100 from clogging.

[0062] In some embodiments of this application, such as Figure 1 and Figure 2As shown, the second filter element 4 is constructed as a frustum-shaped filter structure. That is, the second filter element 4 can be constructed as a regular frustum-shaped filter structure or an inverted frustum-shaped filter structure. If the second filter element 4 is constructed as a regular frustum-shaped filter structure, the cross-section of the second filter element 4 gradually increases from top to bottom along the first direction Y. If the second filter element 4 is constructed as an inverted frustum-shaped filter structure, the cross-section of the second filter element 4 gradually decreases from top to bottom along the first direction Y. With this configuration, the filter surface of the second filter element 4 is inclined, which is beneficial to increasing the filter area of ​​the second filter element 4 compared to the filter surface that is vertically arranged along the first direction Y, thereby achieving a better filtration effect and further preventing the air valve 100 from clogging.

[0063] In some embodiments of this application, the first filter element 3 and the second filter element 4 can be constructed as an integral molded part. For example, the first filter element 3 and the second filter element 4 can be integral injection molded parts or integral casting molded parts.

[0064] In some embodiments of this application, such as Figure 1 and Figure 2 The outer surface of the casing 22 is provided with a first mounting part 221, and the outer peripheral surface of the second filter element 4 is provided with a second mounting part 42 that is fitted and assembled with the first mounting part 221. The first mounting part 221 and the second mounting part 42 are screwed together and fixed.

[0065] Specifically, the outer surface of the casing 22 is provided with a protruding first mounting portion 221, and the outer peripheral surface of the second filter element 4 is provided with a second mounting portion 42 that mates with the first mounting portion 221. The first mounting portion 221 has a first mounting hole, and the second mounting portion 42 has a second mounting hole corresponding to the first threaded hole. Bolts are passed through the first mounting hole and the second mounting hole in sequence from top to bottom and are screwed into the nut below the second mounting portion 42, thereby realizing the screwed fixation of the second filter element 4 and the first filter element 3. In this application, the size of the second filter element 4 is smaller than the size of the valve inlet 12. This screwed fixation facilitates the disassembly, replacement and cleaning of the second filter element 4. At the same time, if the first filter element 3 and the second filter element 4 are integrally formed, it is also convenient to replace and clean the first filter element 3 and the second filter element 4 as a whole, thereby ensuring the reliability of the air valve 100.

[0066] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the valve body 1 is provided with a cleaning port 14, which is connected to the first valve chamber 11. The air valve 100 also includes a sealing element 5 and an inlet pipe 6. The inlet pipe 6 is connected to the cleaning port 14. The sealing element 5 is located in the inlet pipe 6, and the sealing element 5 can selectively block or open the inlet pipe 6.

[0067] Specifically, the sealing component 5 can be constructed as a ball valve structure, which is installed on the inlet pipe 6. The ball valve structure can selectively block or open the inlet pipe 6 to allow it to be open or closed. When too many impurities accumulate in the first valve chamber 11 of the air valve 100, the air valve 100 is removed from the water supply pipe, and the inlet pipe 6 is connected to the external flushing device. Then, the ball valve structure is controlled to open the inlet pipe 6 to allow it to be open. When the external flushing device supplies cleaning fluid to the inlet pipe 6, the cleaning fluid flows sequentially through the inlet pipe 6 and the external flushing device. The cleaning fluid enters the first valve chamber 11 through the inlet 14, thereby cleaning the first valve chamber 11. It is understood that if the first filter element 3 and the second filter element 4 are not removed, the cleaning fluid can also clean the first filter element 3 and the second filter element 4 when it flows through the valve inlet 12, thereby avoiding the blockage of the first filter hole 31 and the second filter hole 41 by impurities. With this setting, by cleaning the first valve chamber 11, the first filter element 3 and the second filter element 4, not only is the filtration function of the first filter element 3 and the second filter element 4 guaranteed, but also the reliability of the air valve 100 is ensured.

[0068] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the float assembly 21 includes a float 212 and a valve disc 211. The float 212 is located on the side of the valve disc 211 away from the valve outlet 13. The float 212 is adapted to push the valve disc 211 toward the valve outlet 13 so that the valve disc 211 blocks the valve outlet 13.

[0069] Specifically, the float 212 is a hollow ball, and the valve disc 211 is arc-shaped with its edge bent towards the float 212. The arc diameter of the valve disc 211 is larger than the inner diameter of the valve outlet 13, thus enabling the valve disc 211 to block the valve outlet 13. A valve seat 20 is provided at the valve outlet 13, and a sealing ring 30 is provided on the edge of the valve seat 20 along the radial direction of the valve outlet 13. When the air valve 100 exhausts air, the float 212 floats up under the buoyancy of the water to push the valve disc 211 toward the valve outlet 13. When the exhaust is complete, the float 212 pushes the valve disc 211 to the position of the valve seat 20, and the valve disc 211 and the valve seat 20 form a seal. The sealing ring 30 ensures the sealing performance. When the water supply pipeline generates negative pressure due to drainage, the pressure in the first valve chamber 11 drops sharply, and the valve disc 211 descends to open the valve outlet 13, thus enabling the air valve 100 to draw in a large amount of air.

[0070] In some embodiments of this application, the lower end of the float 212 is fixedly connected to a first guide post 8, and the protective sleeve 22 is provided with a guide hole 223 that is fitted with the first guide post 8. The float 212 is guided by the first guide post 8 and the guide hole 223, thereby ensuring that the float 212 does not deviate when moving in the vertical direction.

[0071] In some embodiments of this application, such as Figure 1 As shown, the air valve 100 further includes a valve cover 7, which includes a housing 71. A second valve chamber 711 is formed within the housing 71. The second valve chamber 711 is connected to the first valve chamber 11 via a valve outlet 13. Along the first direction Y, the housing 71 also has an exhaust port 712, through which the second valve chamber 711 is connected to the outside. With this configuration, when the air valve 100 exhausts air, the gas in the water supply pipeline is discharged sequentially through the valve inlet 12, the first valve chamber 11, the valve outlet 13, the second valve chamber 711, and the exhaust port 712. When the air valve 100 replenishes air, outside air enters the water supply pipeline sequentially through the exhaust port 712, the second valve chamber 711, the valve outlet 13, the first valve chamber 11, and the valve inlet 12.

[0072] In some embodiments of this application, such as Figure 1 As shown, a second guide post 9 is fixedly connected to the upper end of the valve disc 211, and a guide shaft 10 is provided in the second valve cavity 711 to cooperate with the second guide post 9. The valve disc 211 is guided by the second guide post 9 and the guide shaft 10, so as to ensure that the valve disc 211 does not deviate when it moves in the vertical direction.

[0073] In some embodiments of this application, a micro-venting channel is provided on the valve disc 211. When the float 212 separates from the valve disc 211, the first valve chamber 11 is connected to the outside through the micro-venting channel. For example, the first valve chamber 11 can be directly connected to the outside through the micro-venting channel, or it can be connected to the outside through the micro-venting channel and the second valve chamber 711. When the float 212 contacts the valve disc 211, the float 212 blocks the micro-venting channel.

[0074] This application uses the micro-venting channel of the first valve chamber 11 and the connection between the second valve chamber 711 and the outside as an example for illustration. Specifically, when there is a small amount of air in the water supply pipeline, the air accumulates in the first valve body 1. The air can push down the liquid level, and the float 212 drops slightly with the liquid level. However, since the upper part of the valve disc 211 is in contact with the air, the pressure inside the first valve chamber 11 is high, while the air pressure inside the second valve chamber 711 is low. The valve disc 211 in the first valve chamber 11 will not drop, and the air will be discharged from the micro-venting channel (i.e., small hole) set in the middle of the valve disc 211, thereby achieving the micro-venting function. Optionally, the micro-venting channel is connected to the outside through the through hole of the second guide post 9.

[0075] In some embodiments of this application, such as Figure 1 and Figure 2As shown, the valve cover 7 also includes a third filter element 72 and a protective cover 73. The third filter element 72 is arranged circumferentially around the housing 71, and the protective cover 73 covers the third filter element 72. The third filter element 72 has a plurality of third filter holes 721, and the exhaust port 712 communicates with the outside through the plurality of third filter holes 721.

[0076] Specifically, the third filter element 72 is arranged circumferentially around the housing 71. The third filter element 72 can be constructed as a cylindrical filter structure. The protective cover 73 is placed on the upper end of the third filter element 72. The third filter element 72 has multiple third filter holes 721. The exhaust port 712 is connected to the outside through the multiple third filter holes 721. This arrangement not only ensures the normal exhaust and air replenishment functions of the air valve 100, but also protects the inside of the air valve 100. It can filter dust and other impurities in the air and prevent impurities from entering the air valve 100 and causing blockage.

[0077] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0079] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0080] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An air valve, characterized in that The air valve comprises: a valve body (1) provided with a first valve cavity (11), a valve inlet (12) and a valve outlet (13), the valve inlet (12) being communicated with the valve outlet (13) through the first valve cavity (11); an adjusting structure (2) arranged in the first valve cavity (11), the adjusting structure (2) comprising a float assembly (21) and a guide sleeve (22), the guide sleeve (22) being fixedly connected with the valve body (1), the float assembly (21) being arranged on a side of the guide sleeve (22) away from the valve inlet (12), the float assembly (21) being movably arranged in the first valve cavity (11), the float assembly (21) selectively opening or blocking the valve outlet (13); a first filter (3) having a plurality of first filter holes (31), the first filter (3) being arranged at the valve inlet (12) and fixedly connected with the guide sleeve (22).

2. The air valve according to claim 1, characterized in that The first filter (3) is configured as a filter plate, an outer circumferential surface of the filter plate being attached to an inner circumferential surface of the valve inlet (12).

3. The air valve of claim 1, wherein, The air valve further comprises a second filter (4) having a plurality of second filter holes (41), the second filter (4) being fixedly connected between the guide sleeve (22) and the first filter (3); the second filter (4) being arranged circumferentially around the guide sleeve (22), so that the first filter (3), the second filter (4) and the guide sleeve (22) jointly form a filter space.

4. The air valve of claim 3, wherein, The second filter (4) is configured as a circular truncated cone filter structure.

5. The air valve of claim 3, wherein, An outer surface of the guide sleeve (22) is provided with a first mounting portion (221), an outer circumferential surface of the second filter (4) is provided with a second mounting portion (42) matched with the first mounting portion (221), and the first mounting portion (221) and the second mounting portion (42) are fixedly screwed.

6. The air valve of claim 1, wherein, The valve body (1) is provided with a cleaning port (14) communicated with the first valve cavity (11); The air valve further comprises a blocking member (5) and a liquid inlet pipeline (6), the liquid inlet pipeline (6) being communicated with the cleaning port (14), the blocking member (5) being arranged at the liquid inlet pipeline (6) and selectively blocking or opening the liquid inlet pipeline (6).

7. The air valve of claim 1, wherein, The float assembly (21) comprises a float (212) and a valve disc (211), the float (212) being arranged on a side of the valve disc (211) away from the valve outlet (13), the float (212) being adapted to push the valve disc (211) to move towards the valve outlet (13) so as to block the valve outlet (13).

8. The air valve of claim 7, wherein, The air valve further comprises a valve cover (7), the valve cover (7) comprises a shell (71), a second valve cavity (711) is formed in the shell (71), the second valve cavity (711) communicates with the first valve cavity (11) through the valve door outlet (13), the shell (71) further has an exhaust port (712), the second valve cavity (711) communicates with the outside through the exhaust port (712).

9. Air valve according to claim 7 or 8, characterized in that A micro exhaust passage is formed in the valve disc (211), when the float (212) is separated from the valve disc (211), the first valve cavity (11) communicates with the outside through the micro exhaust passage, when the float (212) contacts the valve disc (211), the float (212) blocks the micro exhaust passage.

10. The air valve of claim 8, wherein, The valve cover (7) further comprises a third filter (72) and a protective cover (73), the third filter (72) is circumferentially arranged around the shell (71), the protective cover (73) covers the third filter (72), the third filter (72) has a plurality of third filter holes (721), the exhaust port (712) communicates with the outside through a plurality of third filter holes (721).

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