Air valve silencer

Abstract

The utility model belongs to the technical field of air valves, and particularly discloses an air valve silencer which comprises a silencing shell, a containing cavity and a silencing cavity are formed in the silencing shell, the containing cavity is located in the middle of the silencing shell and used for containing an air valve, an air suction port is formed in the top of the silencing shell, and a one-way conduction structure is arranged on the silencing shell. When the internal pressure of the containing cavity is not smaller than the external atmospheric pressure, the air suction port is closed through the one-way communicating structure, and when the internal pressure of the containing cavity is smaller than the external atmospheric pressure, the air suction port is opened through the one-way communicating structure. The silencing cavity is located on the side portion of the silencing shell and communicates with the containing cavity and the outside atmosphere, a plurality of silencing structures are arranged in the silencing cavity at intervals in the height direction, and gas exhausted by the air valve can enter the silencing cavity along the containing cavity, is silenced through the silencing structures from bottom to top in the silencing cavity and then is exhausted out of the silencing shell. The air valve silencing device can reduce noise generated when the air valve exhausts air outwards.

Description

Technical Field

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

[0002] An air valve is a functional valve used to prevent negative pressure from forming in pipelines during transient processes, ensuring that the pipeline system can operate normally.

[0003] In related technologies, air valves can draw in air when the pressure in the pipeline is lower than atmospheric pressure and discharge air when the pressure is higher than atmospheric pressure, thereby avoiding liquid column separation or other adverse situations caused by negative pressure. However, air valves emit a lot of noise when discharging large amounts of gas, causing noise pollution, and urgently need improvement. Utility Model Content

[0004] In view of the deficiencies or improvement needs of the prior art, this application provides an air valve silencing device, which aims to solve the problem of noise pollution caused by the air valve emitting a lot of noise when a large amount of gas is discharged.

[0005] This application provides an air valve silencing device, specifically comprising a silencing housing, wherein the silencing housing has a receiving cavity and a silencing chamber inside, wherein:

[0006] The receiving cavity is located in the middle of the muffler housing and is used to receive the air valve. The top of the muffler housing is provided with an air intake port, and the muffler housing is provided with a one-way conduction structure. When the pressure inside the receiving cavity is not less than the external atmospheric pressure, the one-way conduction structure closes the air intake port, and when the pressure inside the receiving cavity is less than the external atmospheric pressure, the one-way conduction structure opens the air intake port.

[0007] The silencing cavity is located on the side of the silencing shell. The silencing cavity is connected to the receiving cavity and the outside atmosphere. Multiple silencing structures are arranged at intervals along the height direction inside the silencing cavity. The gas discharged by the air valve can enter the silencing cavity along the receiving cavity, and after being silenced by the silencing structures from bottom to top in the silencing cavity, it is discharged to the outside of the silencing shell.

[0008] Compared with the prior art, the technical solution conceived in this application allows the air valve to be housed inside the silencer housing. When the air valve discharges a large amount of gas, generating noise, the gas discharged from the air valve can enter the silencer chamber along the housing cavity, and then be silenced from bottom to top through the silencer structure before being discharged outside the silencer housing, thus reducing noise. The unidirectional flow structure at the top of the silencer housing ensures the normal intake function of the air valve, thereby guaranteeing smooth intake and exhaust operations.

[0009] In addition, this device can replace some components of an air valve. Due to its unique structure, it can replace the protective cover, filter screen, and other impurity-preventing components of an air valve. Furthermore, by pre-designing the flow area inside the silencing chamber, the exhaust volume of the air valve can be altered, thus absorbing pressure fluctuations in the pipeline and mitigating pressure changes to prevent water hammer.

[0010] As a further preferred embodiment, the silencing housing includes an inner cylinder and an outer cylinder connected from the inside to the outside, the internal cavity of the inner cylinder is the receiving cavity, and there is a sandwich between the inner cylinder and the outer cylinder to form the silencing cavity.

[0011] As a further preferred embodiment, the bottom sidewall of the inner cylinder is provided with a vent, and the receiving cavity is connected to the sound-absorbing cavity through the vent;

[0012] The top and / or upper side of the silencing housing are provided with an exhaust port, and the silencing cavity is connected to the outside atmosphere through the exhaust port.

[0013] As a further preferred embodiment, the silencing structure has a silencing portion with silencing holes, and the silencing portions of the plurality of silencing structures are staggered sequentially along the height direction.

[0014] As a further preferred embodiment, the silencing structure is an annular silencing plate, which is sleeved and fixed between the inner cylinder and the outer cylinder. The silencing plate is divided into a reflective part and a silencing part in sequence along the circumference, and the reflective part is formed by a non-perforated flat plate.

[0015] As a further preferred embodiment, the unidirectional conduction structure includes a valve disc and an elastic element. The valve disc is movably and sealingly connected to the inside of the air intake through the elastic element. The valve disc can reciprocate with changes in the pressure difference between the inside and outside of the receiving cavity to adjust the opening of the air intake.

[0016] As a further preferred embodiment, the air intake of the silencer housing is provided with a guide structure, and a guide rod is provided at the end of the valve disc facing the air intake, with the guide rod slidingly engaged with the guide structure.

[0017] As a further preferred embodiment, the guide rod is connected to an adjusting element for adjusting the preload of the elastic element.

[0018] As a further preferred embodiment, the silencing housing is provided with a heat insulation structure, and / or, the silencing housing is provided with a heating component.

[0019] As a further preferred embodiment, the bottom of the silencer housing is provided with an installation port for connecting the air valve to an external pipeline.

[0020] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages:

[0021] 1. This device can ensure that the air valve can perform normal intake and exhaust operations. When the air valve exhausts a large amount of gas and generates noise, the gas discharged from the air valve can enter the silencing chamber along the receiving cavity, and then pass through the silencing structure from bottom to top in the silencing chamber before being discharged outside the silencing housing, thereby reducing noise.

[0022] 2. This device can replace the protective cover, filter screen and other impurity prevention accessories of the air valve. Furthermore, based on the size of the flow area of ​​the internal structure of the silencer chamber, the exhaust volume of the air valve can be changed, which can absorb the pressure fluctuations in the pipeline, thereby slowing down the pressure changes in the pipeline and preventing water hammer.

[0023] 3. Insulation materials can be applied to both the inside and outside of this device to prevent the internal structure of the air valve from freezing and losing its function in low-temperature environments. In addition, this device can also be equipped with heating components such as heating belts to heat and insulate the inside of the silencer housing, keeping the air valve in a suitable working environment and ensuring stable operation of the air valve. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an air valve silencer provided in an embodiment of this application;

[0025] Figure 2 This is a diagram showing the operating state of the air valve silencer device under exhaust conditions provided in the embodiments of this application;

[0026] Figure 3 This is a diagram showing the operating state of the air valve silencer device under intake conditions provided in the embodiments of this application;

[0027] Figure 4 This is a cross-sectional view of the air valve silencer device provided in the embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the noise reduction structure provided in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of an air valve silencer with a heat insulation structure provided in an embodiment of this application.

[0030] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0031] 1. Silencing housing; 1-1. Inner cylinder; 1-2. Outer cylinder; 1-3. Annular base; 2. Receiving cavity; 3. Silencing cavity; 4. Air valve; 5. One-way conduction structure; 5-1. Valve disc; 5-2. Elastic element; 5-3. Guide structure; 5-4. Guide rod; 5-5. Adjusting element; 6. Silencing structure; 6-1. Silencing part; 6-2. Reflecting part; 7. Thermal insulation structure; 100. Air intake port; 200. Vent port; 300. Exhaust port; 400. Mounting port. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0034] This application discloses an air valve silencer. (Refer to...) Figures 1-4 The air valve silencing device includes a silencing housing 1, which contains a receiving cavity 2 and a silencing chamber 3. The receiving cavity 2 is located in the middle of the silencing housing 1 and is used to house an air valve 4. An air intake 100 is provided at the top of the silencing housing 1, and a one-way conduction structure 5 is provided on the silencing housing 1 for opening and closing the air intake 100. When the internal pressure of the receiving cavity 2 is not less than the external atmospheric pressure, the one-way conduction structure 5 closes the air intake 100 (e.g., when the pressure inside the receiving cavity 2 is not less than the external atmospheric pressure). Figure 2 As shown), when the internal pressure of the receiving cavity 2 is less than the external atmospheric pressure, the unidirectional guiding structure 5 opens the air intake 100 (as shown). Figure 3 (as shown). The silencing chamber 3 is located on the side of the silencing shell 1. The silencing chamber 3 is connected to the receiving chamber 2 and the outside atmosphere. Multiple silencing structures 6 are arranged at intervals along the height direction in the silencing chamber 3. The gas discharged by the air valve 4 can enter the silencing chamber 3 along the receiving chamber 2, and after being silenced from bottom to top by the silencing structures 6 in the silencing chamber 3, it is discharged to the outside of the silencing shell 1.

[0035] In this design, the device can accommodate the air valve 4 inside the silencer housing 1, allowing the air valve 4 to smoothly draw in air and exhaust it with silence. When the air valve 4 exhausts a large amount of air, generating noise, the gas discharged from the air valve 4 can enter the silencer chamber 3 along the receiving cavity 2, and then pass through the silencer structure 6 from bottom to top in the silencer chamber 3 before being discharged outside the silencer housing 1, thus reducing noise. The one-way conduction structure 5 at the top of the silencer housing 1 ensures the normal air intake function of the air valve 4 and ensures that the air intake port 100 is closed when the air valve 4 exhausts air, ensuring that the air valve 4 can smoothly carry out air intake and exhaust operations.

[0036] In addition, this device can replace some of the components of air valve 4. Due to its unique structure, it can replace the protective cover, filter screen, and other impurity-preventing components of air valve 4. Furthermore, by pre-designing the flow area inside the silencing chamber 3, the exhaust volume of air valve 4 can be altered, thereby absorbing some pressure fluctuations in the pipeline, mitigating pressure changes, and preventing water hammer.

[0037] Furthermore, such as Figure 2 As shown, in some embodiments, the silencing housing 1 includes an inner cylinder 1-1 and an outer cylinder 1-2 connected from the inside to the outside. The internal cavity of the inner cylinder 1-1 is a receiving cavity 2. There is a sandwich between the inner cylinder 1-1 and the outer cylinder 1-2 to form a silencing cavity 3.

[0038] Furthermore, the tops of the inner cylinder 1-1 and the outer cylinder 1-2 are bent inwards and connected to each other to form an air intake 100 at the center of the cylinder. The bottoms of the inner cylinder 1-1 and the outer cylinder 1-2 are sealed to the annular base 1-3, which has a through hole at its center, so that the silencing housing 1 presents an overall concentric double-cylinder structure with an annular silencing interlayer.

[0039] In actual use of this device, the air valve 4 can be installed and fixed at the annular base 1-3 at the bottom of the silencer housing 1. The opening of the annular base 1-3 serves as the installation port 400 for the air valve 4 to connect with the external pipeline.

[0040] Furthermore, in some embodiments, a vent 200 is provided on the bottom sidewall of the inner cylinder 1-1, and the receiving cavity 2 communicates with the silencing cavity 3 through the vent 200. Further, an exhaust port 300 is provided on the top and / or upper side (i.e., side body) of the silencing shell 1, and the silencing cavity 3 communicates with the outside atmosphere through the exhaust port 300. Preferably, the exhaust port 300 is a series of circular holes circumferentially distributed on the top of the silencing shell 1. Alternatively, the exhaust port 300 is a series of circular holes (not shown in the figure) formed on the upper sidewall of the outer cylinder 1-2.

[0041] Furthermore, in some embodiments, the silencing structure 6 has a silencing portion 6-1 with silencing holes, and the silencing portions 6-1 of multiple silencing structures 6 are staggered sequentially along the height direction.

[0042] In this design, by changing the position of the silencing parts 6-1 in multiple silencing structures 6, the originally straight silencing channels in the silencing cavity 3 become interwoven and complex. When the air valve 4 exhausts air, sound waves in the silencing cavity 3 will undergo conduction changes such as first separating and then converging. This makes the sound wave conduction paths different in different areas of the silencing cavity 3, causing the sound waves to superimpose and interfere during propagation, thus canceling each other out and reducing the sound intensity. For ease of understanding, Figure 2 , Figure 3 and Figure 5 The small arrows in the image roughly indicate the propagation path of the sound waves.

[0043] For example, when two or more sound waves meet, their amplitudes will superimpose or cancel each other out, thereby reducing the intensity of the noise; for example, the surface of the internal structure of the silencing cavity 3 reflects or refracts sound waves, so as to use the principle of reflection to reflect the sound waves back to the source or change the direction and path of propagation, thereby reducing the range of noise propagation.

[0044] Specifically, in some embodiments, such as Figure 5 As shown, the silencing structure 6 is an annular silencing plate, which is fitted and fixed between the inner cylinder 1-1 and the outer cylinder 1-2. The silencing plate is divided into a reflective part 6-2 and a silencing part 6-1 along the circumference. The reflective part 6-2 is formed by a non-perforated flat plate.

[0045] Under this design, the silencing structure 6 not only has a silencing effect, but also provides support and fixation for the inner cylinder 1-1 and the outer cylinder 1-2, thereby improving the strength of the device. During the manufacturing of this device, the posture of the silencing plates can be adjusted by rotating them circumferentially to achieve the misalignment of the reflective parts 6-2 between adjacent silencing plates, making the operation simple and convenient.

[0046] In actual manufacturing, the sound-absorbing panel is preferably a one-piece panel. Sound-absorbing holes are made in local sections of the panel to obtain the sound-absorbing part 6-1, and the remaining sections without sound-absorbing holes serve as the reflective part 6-2. Of course, in other embodiments, the sound-absorbing structure 6 can be selected as a base or block structure, and the sound-absorbing structure 6 can be made of sound-absorbing materials such as glass fiber or ceramic fiber.

[0047] Furthermore, refer to Figure 4 In some embodiments, the unidirectional conduction structure 5 includes a valve disc 5-1 and an elastic element 5-2. The valve disc 5-1 is movably and sealingly connected to the inside of the air intake 100 through the elastic element 5-2. The valve disc 5-1 can reciprocate according to the pressure difference between the inside and outside of the receiving cavity 2 to adjust the opening of the air intake 100. The elastic element 5-2 includes, but is not limited to, a spring.

[0048] Furthermore, such as Figure 4 As shown, in some embodiments, a guide structure 5-3 is provided at the air intake 100 of the silencer housing 1, and a guide rod 5-4 is provided at the end of the valve disc 5-1 facing the air intake 100. The guide rod 5-4 is slidably engaged with the guide structure 5-3. Preferably, the guide structure 5-3 is a cross support rod fixed to the inner wall of the air intake 100. A guide hole is provided at the center of the cross support rod, and the guide rod 5-4 passes through and is slidably engaged with the guide hole.

[0049] Of course, in some other embodiments, guide structures 5-3 such as guide grooves or guide protrusions can also be used. These guide structures 5-3 slide with the guide rod 5-4 to guide the guide rod 5-4.

[0050] Furthermore, in some embodiments, the guide rod 5-4 is connected to an adjusting member 5-5 for adjusting the preload of the elastic member 5-2, the adjusting member 5-5 including but not limited to a nut.

[0051] For example, such as Figure 4 As shown, the adjusting element 5-5 is a nut, which is threaded onto the guide rod 5-4. The elastic element 5-2 is a spring fitted inside the guide rod 5-4, with its top contacting the nut and its bottom contacting the top of the guide structure 5-3. By adjusting the nut with a screw, the position of the nut can be adjusted axially along the guide rod 5-4, thereby adjusting the preload of the spring.

[0052] Furthermore, in some embodiments, the silencing housing 1 is provided with a heat insulation structure 7, and / or, the silencing housing 1 is provided with a heating element (not shown).

[0053] like Figure 6 As shown, in some specific embodiments, thermal insulation material can be attached to both the inside and outside of the silencing housing 1 to form a thermal insulation structure 7, so as to prevent the air valve 4 from freezing and losing its function in a low-temperature environment.

[0054] In some specific embodiments, a heating element is provided in the silencing housing 1. The heating element is used to actively provide heat when the ambient temperature is too low, preventing the internal structure of the air valve 4 from freezing and failing. The heating device includes, but is not limited to, heating belts, electric heating wires, etc. When a heating belt is used as the heating element, the heating belt is usually powered by a power source built into the silencing housing 1 or by an external power source.

[0055] Of course, in some specific embodiments, insulation material and heating components can be provided in the silencing housing 1 at the same time to ensure that the air valve 4 operates in a suitable temperature environment.

[0056] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0057] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection 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.

[0060] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air valve silencer device, characterized by, The application relates to a sound-absorbing shell (1) which comprises a containing cavity (2) and a sound-absorbing cavity (3). The containing cavity (2) is located in the middle of the sound-absorbing shell (1) and is used for containing an air valve (4); the top of the sound-absorbing shell (1) is provided with an air inlet (100); a one-way conducting structure (5) is arranged on the sound-absorbing shell (1); when the internal pressure of the containing cavity (2) is not less than the external atmospheric pressure, the one-way conducting structure (5) closes the air inlet (100); when the internal pressure of the containing cavity (2) is less than the external atmospheric pressure, the one-way conducting structure (5) opens the air inlet (100). The sound-absorbing cavity (3) is located at the side of the sound-absorbing shell (1) and is in communication with the containing cavity (2) and the external atmosphere; a plurality of sound-absorbing structures (6) are arranged in the sound-absorbing cavity (3) in the height direction; the gas discharged by the air valve (4) can enter the sound-absorbing cavity (3) from the containing cavity (2) and is discharged to the outside of the sound-absorbing shell (1) after being absorbed by the sound-absorbing structures (6) from bottom to top in the sound-absorbing cavity (3).

2. The air valve silencer device of claim 1, wherein The sound-absorbing shell (1) comprises an inner cylinder (1-1) and an outer cylinder (1-2) which are connected in sequence from inside to outside; the inner cavity of the inner cylinder (1-1) is the containing cavity (2); the inner cylinder (1-1) and the outer cylinder (1-2) have a sandwich layer to form the sound-absorbing cavity (3).

3. The air valve silencer device of claim 2, wherein The bottom side wall of the inner cylinder (1-1) is provided with a ventilation opening (200); the containing cavity (2) is in communication with the sound-absorbing cavity (3) through the ventilation opening (200). The top and / or the side of the upper part of the sound-absorbing shell (1) is provided with an exhaust opening (300); the sound-absorbing cavity (3) is in communication with the external atmosphere through the exhaust opening (300).

4. The air valve silencer device of claim 2, wherein The sound-absorbing structure (6) has a sound-absorbing part (6-1) with sound-absorbing holes; the sound-absorbing parts (6-1) between the sound-absorbing structures (6) are arranged in sequence in the height direction.

5. The air valve silencing device of claim 4, wherein, The sound-absorbing structure (6) is a ring-shaped sound-absorbing plate which is fixed between the inner cylinder (1-1) and the outer cylinder (1-2); the sound-absorbing plate is sequentially divided into a reflection part (6-2) and the sound-absorbing part (6-1) in the circumferential direction; the reflection part (6-2) is formed by a non-porous flat plate.

6. The air valve silencing device of claim 1, wherein The one-way conducting structure (5) comprises a valve flap (5-1) and an elastic member (5-2); the valve flap (5-1) is movably and sealingly connected to the inner side of the air inlet (100) through the elastic member (5-2); the valve flap (5-1) can reciprocally move to adjust the opening degree of the air inlet (100) according to the internal and external pressure difference of the containing cavity (2).

7. The air valve silencing device of claim 6, wherein The air inlet (100) of the sound-absorbing shell (1) is provided with a guide structure (5-3); one end of the valve flap (5-1) facing the air inlet (100) is provided with a guide rod (5-4); the guide rod (5-4) is in sliding fit with the guide structure (5-3).

8. The air valve silencing device of claim 7, wherein, The guide rod (5-4) is connected with an adjusting member (5-5) for adjusting the pre-tightening force of the elastic member (5-2).

9. The air valve silencing device of claim 1, wherein, The surface of the sound insulation shell (1) is provided with a heat preservation structure (7), and / or the sound insulation shell (1) is provided with a heating component.

10. The air valve silencing device of any one of claims 1-9, wherein, The bottom of the sound insulation shell (1) is provided with a mounting port (400) for the air valve (4) to communicate with the external pipeline.

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