A composite air valve

Abstract

The utility model discloses a composite air valve, which is installed in a water delivery pipeline. If the water filling speed is too fast during the water filling process of the water delivery pipeline, the exhaust speed of the main exhaust port is accelerated, the exhaust volume is increased, and a large amount of air enters the second cavity through the first cavity. The second medium force exerted by the air in the second cavity on the regulating valve flap increases, and the regulating valve flap moves upward, so that the exhaust area of ​​the throttle hole is reduced, and the exhaust volume of the throttle hole is reduced. In the process of reducing the total exhaust volume of the throttle hole, the reaction is exerted on the first cavity and the second cavity, so that the air pressure in the first cavity and the second cavity is increased, and the water filling speed of the pipeline is reduced, thereby preventing the generation of water hammer. In this process, the regulating valve flap moves upward so that the exhaust area of ​​the throttle hole changes linearly, and the second medium force changes. The regulating valve flap can move to different positions following the change of the force, thereby adaptively adjusting the exhaust area of ​​the throttle hole.

Description

Technical Field

[0001] The utility model relates to the technical field of air valves, and more specifically to a composite air valve. Background Art

[0002] In the water pipeline system, when the pump is started to fill water, if the filling speed is too fast, water hammer is likely to occur. Water hammer and bridging water hammer often occur in water pipelines and are difficult to control, which can cause great damage to pipeline facilities.

[0003] Patent application announcement number CN112324978A discloses a composite exhaust valve with a buffer and water hammer prevention structure, including a buffer valve body, a buffer plate is arranged in the buffer valve body, and a plurality of throttle holes are opened on the buffer plate. The buffer plate can rise along the slide rod to compress the spring and close the exhaust valve port. When the flow rate of the pipeline medium increases, the buffer plate in the buffer valve cavity senses the air flow rate and promptly closes the buffer valve port on the upper part of the buffer valve cavity. High-speed air can only be discharged from the throttle hole opened on the buffer plate, which limits the air discharge speed of the pipeline and increases the pressure in the valve body, thereby limiting the speed of the medium flowing into the exhaust valve when the air is exhausted, so that the water flow slowly flows into the exhaust valve, thus preventing the water hammer generated when the medium impacts the float at high speed. Moreover, the exhaust valve in the application is also a composite air valve, which has a main valve disc and a micro exhaust valve connected by the side. During the water filling process, the main valve disc is used for exhaust; after the water filling is completed, the trace gas dissolved in the water is exhausted through the micro exhaust valve.

[0004] However, in this solution, the main valve disc uses a movable float, which has low strength and can only be used in air valves with low working pressure, such as air valves with pressure lower than or equal to PN63. In addition, the main valve disc in this solution has only two exhaust volumes, namely, the exhaust from the buffer large valve port and the exhaust from the throttle hole on the buffer plate, and can only adjust the exhaust volume of the air valve in two stages. Summary of the invention

[0005] The utility model provides a composite air valve, which solves the problem that the existing air valve can only adjust the exhaust volume in stages.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0007] A composite air valve, comprising:

[0008] The valve body has a first cavity inside, a main exhaust port is provided on the top, an air inlet is provided on the bottom, and an auxiliary exhaust port is provided on the side; the main exhaust port, the air inlet and the auxiliary exhaust port are all connected to the first cavity, and the auxiliary exhaust port is connected to the micro exhaust valve assembly;

[0009] A float assembly, comprising a valve flap, wherein the valve flap is located in a first cavity in the valve body, and the valve flap can move under the action of a first medium to correspondingly control the opening and closing of the main exhaust port;

[0010] The regulating assembly comprises a regulating body and a regulating valve flap; the regulating body is provided with a second cavity, the regulating body is located outside the main exhaust port, and the second cavity is connected to the first cavity through the main exhaust port; the regulating body is connected to a throttle body, and the throttle body is provided with a plurality of throttle holes connected to the outlet of the regulating body; the regulating valve flap is connected to a second elastic member, and the elastic force of the second elastic member on the regulating valve flap is opposite to the force of the second medium on the regulating valve flap;

[0011] When the valve flap does not completely close the main exhaust port, the regulating valve flap can move relative to the throttle body under the action of the second medium; during the movement of the regulating valve flap, the regulating valve flap can linearly adjust the exhaust area of ​​the throttle hole.

[0012] As a preferred implementation of the composite air valve, the throttle body is located in the second cavity, the regulating valve flap is located in the throttle body, and the regulating valve flap can move along the side wall of the throttle body.

[0013] As a further improvement of the composite air valve, there are multiple throttling holes, each of which is an elongated hole or a circular hole, distributed around the throttling body.

[0014] As another improvement of the composite air valve, the regulating valve flap and the second elastic member are both sleeved and connected to a second guide shaft, and the second guide shaft is fixedly arranged relative to the regulating body.

[0015] As an embodiment of a composite air valve, the valve body includes a valve cover, and the main exhaust port is located on the valve cover; a valve seat is also provided on the valve cover and located on the inner side of the main exhaust port, and a sealing member is provided on the valve seat, and the valve flap opens and closes the main exhaust port by moving toward or away from the valve seat.

[0016] As a further improvement of the composite air valve, the float assembly further includes a first guide shaft having one end connected to the valve flap, the other end of the first guide shaft passes through the main exhaust port, and the first guide shaft can move in the main exhaust port driven by the valve flap.

[0017] As a further improvement of the composite air valve, an upper support frame is arranged across the main exhaust port, and the first guide shaft is slidably connected to the upper support frame; a first elastic member is also sleeved on the first guide shaft, and the first elastic member is located on the outer side of the valve cover.

[0018] As another improvement of the composite air valve, the valve flap is a float or a floating ball with a hollow interior.

[0019] Furthermore, a baffle is provided at the air inlet and directly below the valve disc, and the baffle is fixedly connected to the valve body.

[0020] As an implementation of the composite air valve, a needle valve is also connected to the valve body; a filter screen is also provided on the side of the regulating body close to its outlet, a protective cover is provided above the filter screen, and the second guide shaft is connected to the protective cover.

[0021] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0022] (1) In the composite air valve of the utility model, if the water filling speed is too fast during the water filling process of the water delivery pipeline, the exhaust speed of the main exhaust port is accelerated, the exhaust volume is increased, and a large amount of air enters the second cavity through the first cavity. The second medium force exerted by the air in the second cavity on the regulating valve flap increases, and the regulating valve flap moves upward, so that the exhaust area of ​​the throttle hole is reduced, and the exhaust volume of the throttle hole is reduced. In the process of reducing the total exhaust volume of the throttle hole, it reacts in the first cavity and the second cavity, so that the air pressure in the first cavity and the second cavity increases, and the water filling speed of the pipeline is reduced. In this process, the regulating valve flap moves upward so that the exhaust area of ​​the throttle hole changes linearly, and the second medium force changes. The regulating valve flap can move to different positions following the change of the force, thereby adaptively adjusting the exhaust area of ​​the throttle hole. Since the exhaust area changes linearly, the exhaust speed can be adaptively controlled, so that the regulating valve flap can be prevented from being blown off prematurely due to excessive exhaust, and the water hammer hazard of water filling can be prevented and the bridging water hammer can be suppressed. After the main exhaust port is closed, during the operation of the pipeline, a small amount of gas in the pipeline is discharged through the micro-exhaust valve assembly connected to the auxiliary exhaust port. During water outage, the water level in the first cavity of the valve body drops, the valve disc drops, the main exhaust port opens, and then air is sucked through the throttle hole, which can eliminate the negative pressure in the pipeline and prevent the pipeline from being squeezed. The second elastic member and the second medium have opposite forces on the regulating valve disc. When the force of the second medium increases, the elastic force of the second elastic member also increases, preventing the regulating valve disc from blowing and blocking the outlet of the regulating body.

[0023] (2) In the composite air valve of the utility model, when the valve disc is a float, the float structure has higher strength and the valve disc can withstand greater pressure, so that the air valve can still be used when the pressure is greater than or equal to PN100.

[0024] (3) In the composite air valve of the utility model, a flexible sealing member is arranged on the valve seat. When the valve disc is subjected to low pressure, a soft seal is formed between the valve disc and the sealing member. When the valve disc is subjected to high pressure, a soft seal is formed between the valve disc and the sealing member, and a hard seal is also formed between the valve disc and the valve seat. At this time, the double sealing effect of the soft seal and the hard seal can ensure the sealing effect of the valve disc on the main exhaust port.

[0025] (4) The composite air valve of the utility model is provided with a first guide shaft connected to the valve disc, and the first guide shaft is also sleeved with a first elastic member, and the first elastic member can balance the weight of the valve disc. When water is filled in the first cavity, the valve disc can float up under the action of buoyancy to close the main exhaust port. After the main exhaust port is closed, due to the pressure difference between the inside and outside of the valve body, the main exhaust port will be closed all the time, unless the pipeline pressure is ≤ atmospheric pressure, the main exhaust port will be opened.

[0026] (5) In the composite air valve of the utility model, a baffle is provided at the air inlet and the baffle is located directly below the valve disc. The gas is blocked by the baffle and enters the first cavity through the periphery of the baffle. The gas then flows along the inner wall of the first cavity into the main exhaust port, thereby preventing the gas entering through the air inlet from directly blowing toward the valve disc and preventing the gas from directly blowing up the valve disc during exhaust, thereby blocking the main exhaust port.

[0027] (6) In the composite air valve of the utility model, the regulating valve disc and the second elastic body are both sleeved and connected on the second guide shaft, so that the regulating valve disc can move up and down along the throttle body under the guidance of the second guide shaft, thereby linearly adjusting the exhaust area of ​​the throttle hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of a composite air valve;

[0029] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0030] Figure 3 for Figure 1 The enlarged structural diagram at B in the middle;

[0031] Figure 4 It is a schematic diagram of the explosion structure of the composite air valve;

[0032] Figure 5 This is a schematic diagram of the explosion structure of the composite air valve from another angle;

[0033] Figure 6 Schematic diagram of the regulatory body structure;

[0034] Figure 7 Schematic diagram of valve body structure.

[0035] Description of labels:

[0036] 1. Valve body; 101. Valve disc; 102. First guide shaft; 103. First elastic member; 104. Limiting member; 105. Upper guide sleeve; 106. Lower guide sleeve; 107. Lower support frame; 108. Baffle; 109. Air inlet; 110. Auxiliary exhaust port; 2. Valve cover; 201. Valve seat; 202. Sealing member; 203. Upper support frame; 3. Adjusting body; 301. Throttle body; 302. Second guide shaft; 303. Second elastic member; 304. Adjusting valve disc; 305. Throttle hole; 306. Outer cylinder; 4. Filter; 401. Protective cover; 402. Screw; 5. Micro exhaust valve assembly; 6. Needle valve. DETAILED DESCRIPTION

[0037] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0038] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification, so as to be understood and read by people familiar with this technology, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship should also be regarded as the scope that can be implemented in this utility model without substantial changes in the technical content. In addition, in addition to being used to indicate the orientation or position relationship, the above-mentioned part of the terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For ordinary technicians in this field, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0040] An air valve is installed in the water pipeline system to discharge the air in the water pipeline during the initial filling of the water pipeline and after regular pipeline maintenance, so as to avoid water hammer caused by pressure fluctuations caused by excessive flushing or water hammer caused by bridging during water outage.

[0041] Combination Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a composite air valve, including a valve body 1, a float assembly and a regulating assembly.

[0042] The valve body 1 has a first cavity inside. Figure 1 Taking the middle view as an example, a main exhaust port is opened on the top of the valve body 1, an air inlet 109 is opened on the bottom, and an auxiliary exhaust port 110 is opened on the side; and the main exhaust port, the air inlet 109 and the auxiliary exhaust port 110 are all connected to the first cavity, the auxiliary exhaust port 110 is connected to the micro-exhaust valve assembly 5, the air inlet 109 is connected to the pipeline in the water supply pipeline system, and the main exhaust port is connected to the outside.

[0043] The float assembly includes a valve flap 101 , which is located in a first cavity in the valve body 1 , and the valve flap 101 can move under the action of a first medium to correspondingly control the opening and closing of the main exhaust port.

[0044] The regulating assembly includes a regulating body 3 and a regulating valve flap 304; the regulating body 3 has a second cavity, the regulating body 3 is located outside the main exhaust port, and the second cavity is connected to the first cavity through the main exhaust port; the regulating body 3 is connected to a throttle body 301, and a plurality of throttle holes 305 connected to the outlet of the regulating body 3 are provided on the throttle body 301; one side of the regulating valve flap 304 is connected to a second elastic member 303, and the elastic force of the second elastic member 303 on the regulating valve flap 304 is opposite to the force of the second medium on the regulating valve flap 304, for example, the second elastic member 303 is located on the side of the regulating valve flap 304 opposite to the side where the force of the second medium in the second cavity is located. In this embodiment, the first medium is water in the pipeline, and the second medium is air in the pipeline.

[0045] In this embodiment, when the valve flap 101 does not completely close the main exhaust port, the regulating valve flap 304 can move relative to the throttle body 301 under the action of the second medium; during the movement of the regulating valve flap 304, the regulating valve flap 304 can linearly adjust the exhaust area of ​​the throttle hole 305.

[0046] For example, during the movement of the regulating valve flap 304, the elastic force of the second elastic member 303 can continuously change in the positive direction following the change of the force of the second medium, and the total exhaust area of ​​the throttle hole 305 can continuously change in the negative direction following the change of the force of the second medium.

[0047] The "positive continuous change" described in this embodiment means that when the force of the second medium increases, the elastic force of the second elastic member 303 also increases; when the force of the second medium decreases, the elastic force of the second elastic member 303 also decreases. The "reverse continuous change" described means that when the force of the second medium increases, the total exhaust area of ​​the throttle hole 305 decreases; when the force of the second medium decreases, the exhaust area of ​​the throttle hole 305 increases.

[0048] When the water is filled in the water pipeline system, before the water enters the valve body 1, the air in the pipeline enters the first cavity of the valve body 1 through the air inlet 109, is discharged into the second cavity of the regulating body 3 through the main exhaust port, and finally is discharged to the outside through the throttle hole 305. If the water filling speed is accelerated during the water filling process, the exhaust speed of the main exhaust port is accelerated, the exhaust volume is increased, and a large amount of air enters the second cavity. The air in the second cavity exerts a second medium force on the regulating valve disc 304. Figure 1 , the second medium force in the second cavity is applied to the lower part of the regulating valve flap 304, the air flow increases, the second medium force increases, the regulating valve flap 304 moves upward, the exhaust area of ​​the throttle hole 305 decreases, and the exhaust volume of the throttle hole 305 decreases. In the process of reducing the exhaust volume of the throttle hole 305, it reacts on the first cavity and the second cavity, increasing the air pressure in the first cavity and the second cavity, and reducing the water filling speed of the pipeline. In this process, the regulating valve flap 304 moves upward, causing the exhaust area of ​​the throttle hole 305 to decrease continuously and linearly, and the pressure in the first cavity and the second cavity gradually changes, so that the water filling speed gradually slows down.

[0049] After the water is continuously filled, the water enters the first cavity of the valve body 1. As the water enters, the valve flap 101 rises under the action of the water until the main exhaust port is closed. After the main exhaust port is closed, during the operation of the pipeline, a small amount of gas in the pipeline is discharged through the micro exhaust valve assembly 5 connected to the auxiliary exhaust port 110.

[0050] During water outage, the water level in the first cavity of the valve body 1 drops, the valve flap 101 drops, the main exhaust port opens, and then air is sucked in through the throttle hole 305, which can eliminate the negative pressure in the pipeline and prevent the pipeline from being squeezed.

[0051] A second elastic member 303 is provided on the other side of the regulating valve flap 304 relative to the side where the second medium force is located. The elastic force of the second elastic member 303 can change adaptively with the magnitude of the second medium force. When the second medium force increases, the elastic force of the second elastic member 303 also increases to prevent the throttle hole 305 from being blown and blocked. In this embodiment, the second elastic member 303 can be a spring.

[0052] In other embodiments, the first medium may be wastewater, hot water, seawater, or contain chemical solvents.

[0053] Combination Figure 3 , Figure 4 and Figure 5 As shown, the valve body 1 includes a valve cover 2, and the main exhaust port is located on the valve cover 2. In this embodiment, the valve cover 2 is separately arranged from other structures in the valve body 1, and the valve cover 2 is connected to other structures in the valve body 1 by bolts. In this arrangement of the valve cover 2, the valve cover 2 can be disassembled, which is convenient for the installation and maintenance of the internal components of the valve body 1.

[0054] In other embodiments, the valve cover 2 is integrated with other structures in the valve body 1 to form an integral valve body 1. This method reduces the number of connection steps of the valve cover 2 in terms of process.

[0055] A valve seat 201 is provided on the valve cover 2, and the valve seat 201 is located on the inner side of the main exhaust port. In this embodiment, the inner side of the main exhaust port is the side close to the first space. A sealing member 202 is provided on the side of the valve seat 201 close to the valve flap 101, and the sealing member 202 is made of a flexible material, such as PTFE; the valve flap 101 is made of stainless steel. The valve flap 101 opens and closes the main exhaust port by moving toward or away from the valve seat 201. Specifically, when the valve flap 101 closes the main exhaust port, the valve flap 101 moves toward the valve seat 201, and the valve flap 101 first contacts and squeezes the sealing member 202 to form a soft seal; when the valve flap 101 further approaches the valve seat 201, the sealing member 202 is completely squeezed, and the valve flap 101 contacts and squeezes the valve seat 201 to form a hard seal; through the sealing member 202 and the valve seat 201, when the main exhaust port is closed, the valve flap 101 forms a double sealing effect of a soft seal and a hard seal, which can ensure that the valve flap 101 can ensure the sealing effect of the main exhaust port when the valve flap 101 is subjected to low pressure, such as P≥0.1bar; and high pressure, such as P≤100bar. When the valve flap 101 is separated from the valve flap 101 and the sealing member 202, the main exhaust port is opened.

[0056] Furthermore, the float assembly further includes a first guide shaft 102 connected to the valve disc 101 at one end, and the other end of the first guide shaft 102 passes through the main exhaust port, and the first guide shaft 102 can move up and down in the main exhaust port driven by the valve disc 101. Specifically, an upper support frame 203 is arranged across the main exhaust port, and both ends of the upper support frame 203 are connected to the valve cover 2, and the first guide shaft 102 is slidably connected to the upper support frame 203; a first elastic member 103 is also sleeved on the first guide shaft 102, and the first elastic member 103 is located on the outer side of the valve cover 2.

[0057] As a preferred embodiment, a through hole is provided on the upper support frame 203, and a lower guide sleeve 106 is installed in the through hole. An external thread is provided on the lower guide sleeve 106, so that the lower guide sleeve 106 is threadedly connected to the through hole on the upper support frame 203. One end of the first guide shaft 102 is fixedly connected to the valve disc 101, and the other end passes through the lower guide sleeve 106 and can slide up and down along the lower guide sleeve 106. One end of the first guide shaft 102 passes through the lower guide sleeve 106 and is sleeved and connected to the first elastic member 103 and is also connected to the upper guide sleeve 105. One end of the first elastic member 103 abuts on the upper guide sleeve 105, and the other end abuts on the upper support frame 203. This end of the first guide shaft 102 is also connected to the limiter 104. In this embodiment, the limiter 104 is a locking nut. An external thread is provided on the first guide shaft 102 and is threadedly connected to the limiter 104. The limit member 104 is used to prevent the upper guide sleeve 105 from escaping from the first guide shaft 102, so that the first elastic member 103 can expand and contract between the upper guide sleeve 105 and the upper support frame 203, so that the first elastic member 103 can balance the weight of the valve flap 101. When the water level in the first cavity rises, the valve flap 101 can float up under the action of buoyancy.

[0058] In more detail, the first guide shaft 102 is hollow inside, which can reduce the weight of the first guide shaft 102 itself.

[0059] In this embodiment, the valve flap 101 is a hollow buoy, the interior of the buoy is hollow, and an opening is provided on one side facing the air inlet 109. The buoy is hollow, which can reduce the weight of the buoy on the one hand, and can store gas inside the buoy on the other hand to increase the buoyancy of the buoy.

[0060] The valve flap 101 adopts a float structure, and the side of the float close to the valve seat 201 and the seal 202 is roughly flat, so that the structural strength of the valve flap 101 is higher, the valve flap 101 can withstand greater pressure, and the air valve can adapt to high-pressure operating environments. For example, it can still be used when the pressure is greater than or equal to PN100.

[0061] It should be noted that the valve flap 101 in the composite air valve does not exclude the use of other structures. For example, the valve flap 101 can also be a float type, and the interior of the float is also set to be hollow.

[0062] Combination Figure 7As shown, a baffle 108 is provided at the air inlet 109 of the valve body 1, and the baffle 108 is located directly below the valve disc 101. The baffle 108 is fixedly connected to the valve body 1. Specifically, a lower support frame 107 is provided across one end of the air inlet 109 close to the first cavity, and both ends of the lower support frame 10 are connected to the valve body 1, and the baffle 108 is located on the lower support frame 10. A through hole can be provided on the lower support frame 10, and the baffle 108 is connected to the lower support frame 10 through a bolt or a screw passing through the through hole. When the gas enters the first cavity in the valve body 1 through the air inlet 109, after the baffle 108 is provided at the air inlet 109, the gas is blocked by the baffle 108, and the gas enters the first cavity through the surroundings of the baffle 108, and then the gas flows along the inner side wall of the first cavity into the main exhaust port. The baffle 108 is arranged directly below the valve flap 101. After the gas is blocked by the baffle 108, the gas entering through the air inlet 109 is prevented from directly blowing toward the valve flap 101, thereby preventing the gas from directly blowing up the valve flap 101 during exhaust.

[0063] The valve body 1 in this embodiment is also connected with a needle valve 6, which is used as a manual pressure relief valve when the air valve is repaired. The needle valve 6 is an existing structure, and an existing needle valve can be used.

[0064] In this embodiment, during the water filling process of the water delivery pipeline, the air in the air valve is discharged through the main exhaust valve. After the first medium enters the first cavity of the valve body 1, the valve flap 101 floats up under the buoyancy of the first medium. The first guide shaft 102 connected to the valve flap 101 moves the valve flap 101 up and down under the guidance of the lower guide sleeve 106. The first medium continues to flow into the first cavity until a seal is formed between the valve flap 101, the valve seat 201 and the seal 202, so that the main exhaust port is closed. Thereafter, during the normal operation of the pipeline, the trace gas in the first medium is exhausted through the micro exhaust valve assembly 5 connected to the auxiliary exhaust port 110.

[0065] The auxiliary exhaust port 110 of the valve body 1 is connected to the side bend pipe, and a connecting flange is provided at the other end of the side bend pipe for connecting to the micro-exhaust valve assembly 5. The micro-exhaust valve assembly 5 is a high-pressure micro-exhaust valve structure, so that the composite air valve can be suitable for high-pressure operating environments. The micro-exhaust valve assembly 5 in this embodiment is an existing structure, such as the micro-exhaust valve disclosed in the patent with a publication date of November 7, 2023 and an authorization announcement number of CN219975579U. The micro-exhaust valve is the micro-exhaust valve assembly 5 in this embodiment, and the micro-exhaust valve can be connected with the connecting flange in this embodiment. During normal operation of the pipeline, trace gases in the first medium in the pipeline are discharged through the micro-exhaust valve.

[0066] Combination Figure 2 and Figure 6As shown, in this embodiment, the regulating body 3 is arranged outside the main exhaust port. The regulating body 3 is cylindrical, with openings at both ends, one side is an inlet, and the other side is an outlet. The inlet of the regulating body 3 is connected to the valve cover 2, and the outlet is connected to the throttle hole 305. The regulating body 3 includes an outer cylinder 306 and an inner cylinder. The outer cylinder 306 is surrounded to form a second cavity, and the inner cylinder is a throttle body 301. The throttle body 301 is located in the second cavity, and the regulating valve flap 304 is located in the throttle body 301. The regulating valve flap 304 can move along the side wall of the throttle body 301. The regulating valve flap 304 is also connected to the second guide shaft 302. A through hole is opened in the center of the regulating valve flap 304, and the regulating valve flap 304 is sleeved on the second guide shaft 302 through the through hole, and can slide along the second guide shaft 302. The second guide shaft 302 is also sleeved with a second elastic member 303. In this embodiment, the second elastic member 303 is located on the side of the regulating valve flap 304 opposite to the side where the second medium force in the second cavity is located. One end of the second elastic member 303 abuts against the regulating valve flap 304, and the other end is fixed. A guide sleeve is formed at the central through hole of the regulating valve flap 304, which protrudes toward one side of the regulating valve flap 304 to guide the regulating valve flap 304 during its movement along the second guide shaft 302. A limiting plate is also provided at the lower end of the second guide shaft 302 to limit the regulating valve flap 304 and prevent the regulating valve flap 304 from falling off the second guide shaft 302.

[0067] In the initial state, when there is no gas flow in the second cavity or the force of the gas on the regulating valve flap 304 is insufficient to counteract the gravity of the regulating valve flap 304 and the elastic force of the second elastic member 303, the second cavity is still Figure 1 The center position is described in the figure, the regulating valve flap 304 is located at the lowermost end of the second guide shaft 302, and the other end of the second guide shaft 302 passes through the throttle body 301 and is fixedly arranged on the regulating body 3.

[0068] In a preferred solution of this embodiment, there are multiple throttling holes 305, each of which is an elongated hole, which is vertically arranged and evenly distributed around the throttling body 301. Figure 2In the initial state, the regulating valve flap 304 is located at the bottom of the second guide shaft 302, and the exhaust area of ​​the throttle hole 305 is at its maximum. The exhaust area of ​​the throttle hole 305 corresponds to a height aa. When the water filling speed in the water delivery pipeline is too fast, the exhaust volume in the second cavity increases, so that the force of the second medium on the regulating valve flap 304 increases, the regulating valve flap 304 is blown up, and the regulating valve flap 304 moves up along the second guide shaft 302. The height aa becomes shorter, so that the exhaust area of ​​the throttle hole 305 is reduced, and the exhaust volume of the throttle hole 305 is reduced, which reacts in the second cavity, increases the air pressure in the second cavity, and reduces the water filling speed in the pipeline, thereby preventing the generation of water hammer. In the process of the regulating valve flap 304 moving up, the second elastic member 303 is compressed at the same time, and the second elastic member 303 applies elastic force to the regulating valve flap 304 to prevent the regulating valve flap 304 from blowing and blocking the outlet of the regulating body 3. When the water filling speed in the pipeline changes, the force exerted by the second medium on the regulating valve flap 304 changes, and the regulating valve flap 304 can move to different positions following the change of the force, thereby adaptively adjusting the exhaust area of ​​the throttle hole 305. Since the exhaust area changes linearly, the exhaust speed can be adaptively controlled, thereby preventing the regulating valve flap from being blown off prematurely due to excessive exhaust, and preventing the occurrence of water hammer damage caused by water filling.

[0069] In other embodiments, each throttle hole 305 may also be a circular hole, and the circular holes are also evenly distributed around the throttle body 301. In other cases, the throttle hole 305 may also be other shapes.

[0070] In another embodiment, the second elastic body 303 can also be arranged on the same side of the regulating valve flap 304 as the side where the second medium force in the second cavity is located. In this way, both ends of the second elastic body 303 are fixedly connected, and one end is fixedly connected to the regulating valve flap 304. It is also necessary to pre-adjust the preset force of the second elastic body 303 so that when the regulating valve flap 304 moves upward, the second elastic body 303 applies a pulling force to the regulating valve flap 304, so that it can resist the force of the second medium and prevent the regulating valve flap 304 from blowing and blocking the outlet of the regulating body 3.

[0071] In this embodiment, the throttle body 301 is in a cylindrical shape, and the throttle body 301 encloses a cylindrical hole, and the regulating valve flap 304 is located in the cylindrical hole. The hole area of ​​the cylindrical hole is the cross-sectional area of ​​the nominal diameter of the cylindrical hole, and the regulating valve flap 304 can move up and down in the cylindrical hole, and the outer diameter of the regulating valve flap 304 matches the inner diameter of the cylindrical hole.

[0072] A filter screen 4 is also provided on one side of the regulating body 3 close to its outlet, and a protective cover 401 is provided above the filter screen 4. The second guide shaft 302 is connected to the protective cover 401. Specifically, the upper end of the second guide shaft 302 passes through the protective cover 401 and is fixed by a locking nut. The protective cover 401 is located at the uppermost side of the air valve, and is used to prevent dust from entering the valve cavity. When the air valve is installed outdoors, it can also prevent rainwater from entering the air valve. A number of long screws are connected around the protective cover 401. The long screws pass through the protective cover 401 and the regulating body 3 in turn and are connected to the valve cover 2. The long screws fix the protective cover 401 and the regulating body 3 to the valve cover 2.

[0073] The filter 4 is used to prevent small animals and flying insects from entering the air valve; on the other hand, when the water supply to the pipeline is stopped and the air valve is inhaled, it prevents dead branches, leaves, etc. from being inhaled. The filter 4 is provided with a plurality of through holes, and the total area of ​​the through holes is greater than or equal to twice the nominal diameter cross-sectional area of ​​the filter.

[0074] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A composite air valve, characterized in that: include, A valve body (1) having a first cavity therein, a main exhaust port at the top, an air inlet (109) at the bottom, and an auxiliary exhaust port (110) at the side; the main exhaust port, the air inlet (109) and the auxiliary exhaust port (110) are all in communication with the first cavity, and the auxiliary exhaust port (110) is connected to a micro exhaust valve assembly (5); A float assembly, comprising a valve flap (101), wherein the valve flap (101) is located in a first cavity in the valve body (1), and the valve flap (101) can move under the action of a first medium to correspondingly control the opening and closing of the main exhaust port; A regulating assembly, comprising a regulating body (3) and a regulating valve flap (304); the regulating body (3) has a second cavity therein, the regulating body (3) is located outside the main exhaust port, and the second cavity is connected to the first cavity through the main exhaust port; the regulating body (3) is connected to a throttle body (301), and the throttle body (301) is provided with a plurality of throttle holes (305) connected to an outlet of the regulating body (3); the regulating valve flap (304) is connected to a second elastic member (303), and the elastic force of the second elastic member (303) on the regulating valve flap (304) is opposite to the force of a second medium on the regulating valve flap (304); When the valve flap (101) does not completely close the main exhaust port, the regulating valve flap (304) can move relative to the throttling body (301) under the action of the second medium; during the movement of the regulating valve flap (304), the regulating valve flap (304) can linearly adjust the exhaust area of ​​the throttling hole (305).

2. The composite air valve according to claim 1, characterized in that: The throttle body (301) is located in the second cavity, the regulating valve flap (304) is located in the throttle body (301), and the regulating valve flap (304) is capable of moving along the side wall of the throttle body (301).

3. The composite air valve according to claim 2, characterized in that: There are a plurality of throttling holes (305), each of which is an elongated hole or a circular hole, distributed around the throttling body (301).

4. The composite air valve according to claim 2, characterized in that: The regulating valve flap (304) and the second elastic member (303) are both sleeved and connected to the second guide shaft (302), and the second guide shaft (302) is fixedly arranged relative to the regulating body (3).

5. The composite air valve according to any one of claims 1 to 4, characterized in that: The valve body (1) comprises a valve cover (2), and the main exhaust port is located on the valve cover (2); a valve seat (201) is also provided on the valve cover (2) and located on the inner side of the main exhaust port, and a sealing member (202) is provided on the valve seat (201); the valve flap (101) opens and closes the main exhaust port by moving in a direction approaching or away from the valve seat (201).

6. The composite air valve according to claim 5, characterized in that: The float assembly further comprises a first guide shaft (102) having one end connected to the valve flap (101), the other end of the first guide shaft (102) passing through the main exhaust port, and the first guide shaft (102) can move in the main exhaust port driven by the valve flap (101).

7. The composite air valve according to claim 6, characterized in that: An upper support frame (203) is arranged across the main exhaust port, and the first guide shaft (102) is slidably connected to the upper support frame (203); a first elastic member (103) is also sleeved on the first guide shaft (102), and the first elastic member (103) is located on the outer side of the valve cover (2).

8. The composite air valve according to claim 6, characterized in that: The valve flap (101) is a buoy or a floating ball with a hollow interior.

9. The composite air valve according to claim 8, characterized in that: A baffle (108) is provided at the air inlet (109) and directly below the valve flap (101), and the baffle (108) is fixedly connected to the valve body (1).

10. The composite air valve according to claim 4, characterized in that: The valve body (1) is also connected to a needle valve (6); a filter screen (4) is also provided on a side of the regulating body (3) close to its outlet, a protective cover (401) is provided above the filter screen (4), and the second guide shaft (302) is connected to the protective cover (401).

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