A pipe silencer

Abstract

The application discloses a pipeline silencer, which comprises a pipeline assembly, a sound source, a hydrophone and a gas storage assembly. The pipeline assembly comprises a channel for conveying fluid; the sound source is used for emitting sound waves into the channel; the hydrophone is connected with the pipeline assembly and is used for picking up noise in the channel; the gas storage assembly is provided with a gas storage cavity which is communicated with the inside of the sound source, and the gas storage assembly comprises a flexible part which is used for contacting with the fluid. The pipeline silencer provided by the application is provided with the gas storage assembly, the gas storage cavity which is communicated with the inside of the sound source and the flexible part which is used for contacting with the fluid. When the fluid pressure in the channel changes, the flexible part will be deformed under the action of the pressure, so that the gas storage cavity charges or discharges the sound source, the pressure balance between the inside of the sound source and the fluid pressure outside is realized, and the adverse effect of the fluid pressure in the channel on the vibration of the sound source is reduced. The sound source can effectively inhibit the low-frequency line spectrum noise which propagates along the inside of the pipeline assembly, and a better silencing effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silencers, in particular to a pipeline silencer. BACKGROUND

[0002] Pipeline systems have very important applications in various industrial fields, especially in the field of shipbuilding. Liquid-filled pipeline systems, such as domestic water pipelines and cooling water pipelines, are widely used in various ships and play an important role. Currently, when fluid flows in the pipeline, noise is inevitably generated. Therefore, pipeline silencers that can supply fluid flow and silence are increasingly used in series in the pipeline.

[0003] According to the inventors' knowledge, the vibration energy of the noise signal can be offset by emitting a sound wave corresponding to the noise signal into the pipeline through an electromagnetically driven sound source, thereby achieving the effect of noise reduction. However, the sound source is directly in contact with the fluid inside the pipeline, so when the fluid pressure in the pipeline increases, the fluid pressure in the pipeline will squeeze the vibration member of the sound source, which will adversely affect the normal operation of the sound source.

[0004] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. SUMMARY

[0005] The purpose of the present application is to provide a pipeline silencer that can reduce the adverse effects of fluid pressure on the sound source.

[0006] To achieve the above-mentioned purpose of the application, the present application provides a pipeline silencer, comprising

[0007] a pipeline assembly comprising a channel for conveying fluid;

[0008] a sound source for emitting sound waves into the channel;

[0009] a hydrophone connected to the pipeline assembly for picking up noise in the channel; and

[0010] a gas storage assembly provided with a gas storage cavity in communication with the interior of the sound source, the gas storage assembly comprising a flexible member for contacting the fluid.

[0011] Further, the gas storage assembly is annular and surrounds the ring portion of the pipeline assembly.

[0012] Further, the pipeline assembly comprises a first pipe body, the gas storage assembly surrounds the outside of the first pipe body, the first pipe body is provided with a first perforated area, and the first perforated area is arranged at one end of the first pipe body.

[0013] Further, the gas storage assembly comprises a hard shell, the flexible member and the shell are both annular, the shell is arranged outside the flexible member, and the two are connected to form the gas storage cavity.

[0014] Further, the pipeline assembly comprises a second pipe body and a third pipe body arranged at two ends of the first pipe body respectively, the shell is integrally formed with the second pipe body and the third pipe body; the third pipe body is provided with a mounting pipe portion communicating with the channel and the outside, the sound source is connected with the mounting pipe portion and seals the mounting pipe portion, and the third pipe body is provided with a second perforated area corresponding to the mounting pipe portion.

[0015] Further, the pipeline assembly is provided with a mounting seat on the outer wall for mounting the hydrophone, and the hydrophone is at least partially in contact with the fluid in the channel.

[0016] The pipeline silencer comprises at least two hydrophones, and the at least two hydrophones are arranged upstream of the second pipe body and downstream of the third pipe body respectively.

[0017] Further, the first perforated area and the second perforated area each comprise a plurality of through holes, the diameter of the through holes is 3-6 mm, the length of the first perforated area is 25%-40% of the total length of the first pipe body, the perforation rate of the first perforated area is between 30% and 50%, and the perforation rate of the second perforated area is above 25%.

[0018] Further, the length of the first perforated area is one third of the total length of the first pipe body.

[0019] Further, the pipeline assembly further comprises a gas guide pipe connected between the sound source and the gas storage assembly, and the gas guide pipe communicates the inner cavity of the sound source with the gas storage cavity.

[0020] Further, the pipeline silencer further comprises a control module, the control module is electrically connected with the hydrophone and the sound source, and is used for controlling the sound source to emit sound waves according to the noise signal of the hydrophone, and the sound waves are used for offsetting the vibration of the noise.

[0021] Further, the sound source comprises:

[0022] a shell comprising an inner cavity communicating with the gas storage cavity, the shell is provided with a first open end;

[0023] a vibrating member arranged at the first open end and making the inner cavity form a sealed cavity; and

[0024] an actuator connected with the vibrating member and used for driving the vibrating member to vibrate along a vibration direction, the actuator is arranged inside the inner cavity and is in sliding connection with the shell along the vibration direction.

[0025] Further, the sound source further comprises:

[0026] a resilient member arranged inside the inner cavity and applying elastic force to the actuator along the vibration direction; and

[0027] a slide rail assembly connected between the shell and the actuator, comprising a guide rail and a slide block slidingly connected along the vibration direction, one of the guide rail and the slide block being connected with the inner wall of the shell, and the other being connected with the outer wall of the actuator.

[0028] Further, the resilient member is a spring, which is elastically abutted between the actuator and the shell.

[0029] Further, the vibration member comprises a radiation plate and an elastic support ring located outside the radiation plate, an annular space being formed between the radiation plate and the annular shell, the elastic support ring being fixedly connected with the annular shell and the radiation plate respectively and enclosing the annular space, and the actuator being fixedly connected with the radiation plate.

[0030] Further, the elastic support ring is made of high polymer material, and the radiation plate is made of hard metal or alloy or nylon material.

[0031] Further, the elastic support ring comprises an outer ring, an inner ring and at least one protruding part connected between the outer ring and the inner ring, the outer ring being fixedly connected with the annular shell, and the inner ring being fixedly connected with the radiation plate.

[0032] Compared with the prior art, the pipeline silencer according to one embodiment of the present application has the following beneficial effects: the pipeline silencer comprises a pipeline assembly, a sound source, a hydrophone and a gas storage assembly, the gas storage assembly being arranged in a gas storage cavity in communication with the inside of the sound source and a flexible member for contacting fluid, when the fluid pressure in the channel changes, the flexible member will be deformed under the action of the pressure, so that the gas storage cavity charges or discharges the sound source, thereby realizing pressure balance between the internal pressure of the sound source and the external fluid pressure, and reducing the adverse effects of the fluid pressure in the channel on the vibration of the sound source. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of the pipeline silencer according to one embodiment of the present application;

[0034] Figure 2 is a sectional view of the pipeline silencer shown in Figure 1 ;

[0035] Figure 3 is an enlarged view of part B in Figure 2 ;

[0036] Figure 4 is Figure 1 an exploded view of the pipeline muffler;

[0037] Figure 5 is Figure 1 a sectional view of the sound source;

[0038] Figure 6 is Figure 1 an exploded view of the sound source;

[0039] Figure 7 is Figure 6 a structural schematic view of the elastic support. DETAILED DESCRIPTION

[0040] In order to make the above objectives, features and advantages of the present application more apparent, clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0041] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0042] In this document, reference to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is explicitly contemplated that embodiments described herein can be combined with other embodiments.

[0043] As Figures 1 to 4 shown, the present application provides a pipeline muffler, which comprises a pipeline assembly 1, a sound source 2, a hydrophone 3 and a gas storage assembly 4.

[0044] The pipeline assembly 1 comprises a channel 101 for conveying fluid and a first pipe body 102, a second pipe body 103 and a third pipe body 104, the second pipe body 103 is close to the upstream end of the pipeline assembly 1, and the third pipe body 104 is close to the downstream end of the pipeline assembly 1. The third pipe body 104 is provided with a mounting pipe part 105 which is in communication with the channel 101 and the outside. When the pipeline assembly 1 conveys fluid, the flowing fluid inside the channel 101 will generate noise, which is the noise generated by the fluid flowing along the inside of the channel 101, usually low-frequency line spectrum noise. The free end of the second pipe body 103 and the third pipe body 104 is provided with a flange part 106, so as to be connected in series to the pipeline system which needs to reduce noise. The fluid can be water, oil or other kinds of liquid, or gas.

[0045] The sound source 2 is connected to the mounting pipe part 105 and seals the mounting pipe part 105, and the sound source 2 is used to emit sound waves into the channel 101.

[0046] The hydrophone 3 is connected to the pipeline assembly 1 and is used to pick up the noise in the channel 101, and the sound waves emitted by the sound source 2 are used to cancel the noise, so as to play a role in reducing noise.

[0047] The gas storage assembly 4 is provided with a gas storage cavity 401 which is in communication with the inside of the sound source 2, and the gas storage assembly 4 comprises a flexible part 402 which is used to contact the fluid.

[0048] When the fluid pressure in the channel 101 increases, the fluid in the channel 101 will press the flexible part 402 of the gas storage assembly 4, so as to compress the gas storage cavity 401, so that part of the gas in the gas storage cavity 401 flows into the inside of the sound source 2, and the gas pressure in the sound source 2 is increased until it is close to or the same as the fluid pressure in the channel 101; on the contrary, when the fluid pressure decreases, the flexible part 402 expands, the gas storage cavity 401 forms a negative pressure relative to the sound source 2, and the gas in the inside of the sound source 2 is extracted, so that the gas pressure in the inside of the sound source 2 is close to or the same as the fluid pressure. Therefore, when the fluid pressure in the channel 101 changes, the flexible part 402 will deform under the action of the pressure, so as to make the gas storage cavity 401 inflate or deflate the sound source 2, so as to realize the pressure balance between the inside of the sound source 2 and the outside fluid pressure, thereby reducing the adverse effects of the fluid pressure in the channel 101 on the vibration of the sound source 2. At the same time, the gas storage assembly and the gas storage cavity constitute an expansion pipe type passive silencer, which has both resistive and reactive silencing functions, can effectively suppress medium and high frequency fluid noise, and combines with the active silencing part to form a main and passive composite silencer.

[0049] As a preferred embodiment, the volume of the gas storage cavity 401 is greater than the volume of the inside space of the sound source 2, so that the gas storage cavity 401 can efficiently balance the gas pressure in the sound source 2.

[0050] As a preferred embodiment, as shown in Figure 2 andFigure 4 As shown, the gas storage assembly 4 is annular and surrounds the ring part of the pipeline assembly 1, specifically, it surrounds the outside of the first pipe 102. The first pipe 102 is provided with a first perforated area 1021, and the third pipe 104 is provided with a second perforated area 1041 at a position corresponding to the mounting pipe 105.

[0051] The first perforated area 1021 and the second perforated area 1041 each include a plurality of through holes. The first perforated area 1021 is used to guide the passage 101 and the gas storage cavity 401, so that the flexible member 402 can be in direct contact with the fluid; the second perforated area 1041 can make the sound waves emitted by the sound source 2 enter the fluid in the passage 101, and at the same time can block the sundries in the fluid from entering the sound source 2, so as to avoid affecting the use performance of the sound source 2.

[0052] As a preferred embodiment, the diameter of the through hole is 3-6mm, and the perforation rate of the second perforated area is more than 25%, so as to avoid serious secondary noise at high flow rate. The perforation rate of 25% refers to the ratio of the total area of the through hole to the area of the surface of the second perforated area 1041 provided with the through hole.

[0053] As a preferred embodiment, the first perforated area 1021 is arranged at the end of the first pipe 102 away from the sound source 2, the length of the first perforated area 1021 is 25%-40% of the total length of the first pipe 102, preferably, the length of the first perforated area 1021 is about one third of the total length of the first pipe 102, and the perforation rate of the first perforated area 1021 is between 30%-50%, the perforation rate of 30%-50% refers to the ratio of the total area of the through hole to the area of the surface of the first perforated area 1021 provided with the through hole. If the length of the first perforated area 1021 is too short, the water permeation rate will be too small, and when the pressure in the pipe increases rapidly, the liquid in the pipe flows into the gas storage cavity too slowly, and the pressure self-balancing process responds not timely, and cannot keep up with the change of the pressure in the pipe. If the length of the first perforated area 1021 is too long, when the sound source 2 emits sound, the anti-phase sound waves radiated by the flexible member 402 due to the connection of the gas will efficiently enter the liquid in the pipe through the first perforated area 1021, and will be offset by the sound waves emitted by the sound source 2, forming an acoustic short circuit, thereby reducing the effect of active noise reduction. The length of the first perforated area 1021 is about one third of the total length of the first pipe 102, which is the result of taking into account the above two factors according to research.

[0054] The gas storage assembly 4 includes a hard shell 403, the flexible member 402 and the shell 403 are both annular, the flexible member 402 is arranged inside the shell 403 and connected with the shell 403, and the shell 403 and the flexible member 402 cooperate to form a closed gas storage cavity 401. In this embodiment, the shell 403 is integrally formed with the second pipe 102 and the third pipe 103, and in other embodiments, it can also be separately arranged.

[0055] As shown in Figure 3 The two sides of the housing 403 are provided with annular clamping grooves 404, and the two ends of the flexible member 402 are provided with annular clamping strips 405 which are matched with the clamping grooves 404. When connected, the two ends of the clamping strips 405 are inserted into the clamping grooves 404 respectively and vulcanized, so that the flexible member 402 is connected with the housing 403, which has good sealing performance and can effectively prevent air leakage. In the embodiment, the flexible member 402 is made of high polymer material, such as rubber, and has certain elasticity and is easy to deform under the pressure of the fluid.

[0056] As a preferred embodiment, the flexible member 402 is wrapped around the outside of the first pipe body 101 and is attached to the outer surface of the first pipe body 101. The first pipe body 101 supports the flexible member 402 and prevents the flexible member 402 from being excessively deformed and broken or separated from the housing 403.

[0057] As a preferred embodiment, as shown in Figure 1 and Figure 2 The outer wall of the pipeline assembly 1 is provided with a mounting seat 107 for mounting the hydrophone 3. The hydrophone 3 is at least partially in contact with the fluid in the channel 101, so as to more accurately pick up the noise of the fluid. In the embodiment, the pipeline silencer includes at least two hydrophones 3, which are respectively located upstream of the second pipe body 102 and downstream of the third pipe body 104. The two hydrophones 3 directly detect and pick up the noise upstream and downstream of the pipeline assembly 1.

[0058] The pipeline assembly 1 further includes an air guide pipe 108 connected between the sound source 2 and the gas storage assembly 4. The air guide pipe 108 is connected to the inner cavity of the sound source 2 and the gas storage cavity 401, so as to realize the fluid communication between the sound source 2 and the gas storage cavity 401. The air pressure inside the sound source 2 and the fluid pressure in the channel 101 are automatically balanced within a certain pressure range, thereby improving the reliability of the sound source 2.

[0059] The pipeline silencer further includes a control module (not shown in the figure). The control module is electrically connected with the sound source 2 and the hydrophone 3. The control module collects and analyzes the noise signal in the channel 101 picked up by the hydrophone 3, and generates a driving signal to control the sound source 2 to emit sound waves. The hydrophone 3 can measure the frequency, phase and amplitude of the noise in the channel 101 in real time. The control module generates a driving signal according to the noise signal, so that the sound source 2 emits sound waves in the opposite direction of the noise signal to offset the energy of the noise. In this way, the sound source 2 can actively adapt to the change of the noise frequency in the pipe body 1 and specifically reduce the noise, thereby achieving good silencing function.

[0060] In some embodiments, as shown in Figure 5 and Figure 6 The sound source 2 includes a shell 201, a vibrating member and an actuator 202.

[0061] The shell 201 comprises an inner cavity 2011 connected with the gas storage cavity 401, and the shell 201 is provided with a first opening end 2012.

[0062] The vibration member is arranged at the first opening end 2012, and seals the first opening end 2012, so that the inner cavity 2011 forms a sealed cavity.

[0063] The actuator 202 is arranged inside the inner cavity 2011 and connected with the vibration member, and the vibration member is driven to vibrate by the actuator 202, that is, the vibration member vibrates longitudinally along with the actuator 202 to emit sound waves under water. The longitudinal direction is the direction along the central axis A, and the vibration direction of the vibration member is generally consistent with the axis direction of the actuator 202. The actuator 202 is arranged inside the inner cavity 2011 and is in sliding connection with the shell 201 along the vibration direction (i.e. the direction of the axis A). Figure 2

[0064] In other embodiments, as shown in Figs. 2 and 3, the sound source 2 further comprises an elastic member and a sliding rail assembly 205. Figure 5 Figure 6 The elastic member is arranged inside the inner cavity 2011 and applies an elastic force along the vibration direction to the actuator 202. In this embodiment, the elastic member is connected with the actuator 202. The actuator 202 is driven to displace by the sliding rail assembly 205, so as to facilitate the longitudinal vibration of the actuator 202 relative to the shell 201.

[0065] The resonance frequency of the vibration system (the vibration system is composed of the shell 201, the elastic member, the actuator 202 and the vibration member) can be adjusted by adjusting the elastic coefficient of the elastic member. For pipeline systems with different resonance frequencies of noise, the resonance frequency of the sound source 2 can be adjusted to correspond to the resonance frequency of the noise of the pipeline system. In this way, the sound source 2 emits sound waves with greater amplitude and energy at the resonance frequency, which can better suppress the noise at the resonance frequency of the pipeline system.

[0066] As shown in Figs. 2 and 3, the elastic member is a spring 203, and the number of elastic members can be one or more.

[0067] As shown in Figs. 2 and 3, the elastic member is a spring 203, and the number of elastic members can be one or more. Figure 5 Figure 6 As shown in Figs. 2 and 3, the elastic member is a spring 203, and the number of elastic members can be one or more. Figure 2 ​​​In the illustrated embodiment, multiple springs 203 elastically abut against the actuator 202 and the base plate 2014 of the housing 201. In this embodiment, four spring positioning posts 204 are provided on the top of the actuator 202, arranged symmetrically at the center. Four spring positioning posts 204 are also provided on the top of the housing 201, and their positions correspond to the spring positioning posts 204 on the actuator 202. The two ends of the springs 203 are respectively fitted between two spring positioning posts 204 for easy positioning, so that they elastically abut against the housing 201 and the actuator 202. The springs 203 provide elastic support, which can reduce the resonant frequency of the moving body composed of the vibrating element and the actuator 202.

[0068] The slide rail assembly 205 includes a guide rail 2051 and a slider 2052 that are slidably coupled along the vibration direction A. One of the guide rail 2051 and the slider 2052 is connected to the inner wall of the housing 101, and the other is connected to the outer wall of the actuator 202. In this embodiment, as... Figure 5 As shown, the slide rail assembly 205 includes a guide rail 2051 connected to the inner wall of the housing 201 and a slider 2052 connected to the outer wall of the actuator 202. The slider 2052 cooperates with the guide rail 2051 and can move longitudinally along the guide rail 2051, thereby displacing the actuator 202. The displacement is provided by the slide rail assembly 205. The actuator 202 is displaced through the slide rail assembly 205, which facilitates the actuator 202 driving the vibrating component. Preferably, the number of slide rail assemblies 205 is even, and they are symmetrically arranged on both sides of the actuator 202, so that the force on both sides of the actuator 202 is more balanced. In this embodiment, there are four sets of slide rail assemblies 205, which are respectively arranged in four directions, making the structure robust and stable.

[0069] In a preferred embodiment, the outer casing 201 includes an annular shell 2013, a base plate 2014, and a flange 2015. The base plate 104 is connected to the annular shell 2013, and the flange 2015 is also connected to the annular shell 2013. The vibrating element is disposed opposite to the base plate 2014. The flange 2015 is annular and is installed on the outside of the first open end 2012. The sound source 2 is connected to the mounting tube 105 through the flange 2015. The mounting tube 105 preferably extends radially along the third tube 104. In this embodiment, the annular shell 2013 is integrally formed with the base plate 2014 and the flange 2015, and the inner cavity 2011 is formed between the annular shell 2013 and the base plate 2014. The vibrating element is installed on the first open end 2012 to form a closed cavity in the inner cavity 2011. When the vibrating element follows the actuator 202 and vibrates longitudinally in the water, it will vibrate and generate sound waves in the water.

[0070] The shell 201 is made of hard metal or alloy material, for example, stainless steel or aluminum alloy material, which has certain pressure resistance and is not easy to deform or compress even under high depth of water. The actuator 202, the slide rail assembly 205 and the spring 203 are all located in the inner cavity 2011 of the shell 201, which has the characteristics of small volume and low power consumption. The actuator 202 is preferably an inertial actuator, and is further preferably an electromagnetic inertial actuator. The actuator 202 drives the vibration piece to move longitudinally along the axis A.

[0071] As shown in Figure 5 and 6 , the vibration piece includes a radiation plate 206 and an elastic support ring 207 located outside the radiation plate 206. The radiation plate 206 and the annular shell 2013 form an annular gap 208. The elastic support ring 207 is fixedly connected with the annular shell 2013 and the radiation plate 206 respectively, and seals the annular gap 208. The actuator 202 is fixedly connected with the radiation plate 206. The elastic support ring 207 can make the sound source 2 efficiently radiate very low frequency sound waves to the outside.

[0072] The radiation plate 206 is a hard plate made of metal or alloy or nylon material. The profile size of the radiation plate 206 is smaller than that of the first open end 2012. The elastic support ring 207 is fixedly connected with the annular shell 2013 and the radiation plate 206 respectively, and seals the annular gap 208. The actuator 202 is rigidly connected with the radiation plate 206 through screws or other connecting members, which is firm and not easy to fall off.

[0073] The elastic support ring 207 is made of high polymer material, preferably rubber material, which provides elastic support, small rigidity, large elasticity and large displacement. As shown in Figure 7 , the elastic support ring 207 includes an outer ring 2071, an inner ring 2072 and at least one protruding part 2073 connected between the outer ring 2071 and the inner ring 2072. The protruding part 2073 protrudes along the normal direction of the radiation plate 206. The protruding part 2073 is annular. The elastic support ring 207 is not limited to including only one ring of protruding part 2073, but can also include multiple rings of protruding part 2073. The outer ring 2071 is fixedly connected with the annular shell 2013 by vulcanization. The inner ring 2072 is fixedly connected with the radiation plate 206 by vulcanization, which is firm and not easy to fall off.

[0074] When the actuator 202 vibrates up and down, the radiation plate 206 follows the vibration. The spring 203 and the slide rail assembly 205 are used in cooperation, and the protruding part 2073 of the elastic support ring 207 provides elastic support and displacement. Due to small rigidity, large elasticity and large displacement, the adjustment range of the resonance frequency of the moving body composed of the radiation plate 206 and the actuator 202 is wider, which is beneficial to efficiently radiate very low frequency sound waves to the outside.

[0075] Before the pipeline silencer works, the gas storage cavity 401 and the inner cavity 2011 of the sound source 2 can be pre-charged with a certain air pressure. When working, the fluid pressure (for example, water pressure) in the channel 101 acts on the vibrator, and the water pressure in the channel 101 and the air pressure of the pre-stored air in the inner cavity 2011 balance the vibrator of the sound source 2. The pressure difference on both sides of the vibrator is smaller, and in an ideal state, the vibrator is in a balanced state and can freely vibrate to radiate sound waves. When the fluid pressure in the channel 101 changes, the fluid in the gas storage cavity 401 and the inner cavity 2011 can adaptively move to balance the pressure, thereby reducing the adverse effects of fluid pressure on the operation of the sound source 2 and improving the reliability of the operation of the sound source 2.

[0076] The above is only a specific embodiment of the present application, and any improvement made on the basis of the concept of the present application is considered to be within the protection scope of the present application.

Claims

1. A line silencer, characterized by, The utility model relates to a pipeline muffler, which comprises a pipeline assembly, an acoustic source, a hydrophone and a gas storage assembly. The pipeline assembly comprises a channel for conveying fluid; The acoustic source is used for emitting acoustic waves into the channel; The hydrophone is connected to the pipeline assembly and used for picking up noise in the channel; and The gas storage assembly is provided with a gas storage cavity in communication with the inside of the acoustic source, and comprises a flexible member for contacting the fluid. The gas storage assembly is annular and surrounds a ring part of the pipeline assembly. The gas storage assembly comprises a hard shell, and the flexible member and the shell are both annular, the shell surrounds the outside of the flexible member, and the two are connected to form the gas storage cavity. The pipeline assembly comprises a first pipe body, the gas storage assembly surrounds the outside of the first pipe body, the first pipe body is provided with a first perforated area, and the first perforated area is arranged at one end of the first pipe body. The pipeline assembly comprises a second pipe body and a third pipe body arranged at two ends of the first pipe body respectively, the shell is integrally formed with the second pipe body and the third pipe body, the third pipe body is provided with a mounting pipe part in communication with the channel and the outside, the acoustic source is connected to the mounting pipe part and seals the mounting pipe part, and the third pipe body is provided with a second perforated area at a position corresponding to the mounting pipe part. The first perforated area and the second perforated area each comprise a plurality of through holes. The first perforated area is used for guiding the channel and the gas storage cavity. The flexible member surrounds the outside of the first pipe body and is attached to the outer surface of the first pipe body. The flexible member is made of a high polymer material.

2. The plumbing silencer of claim 1, wherein The pipeline assembly is provided with a mounting seat on the outer wall for mounting the hydrophone, and the hydrophone is at least partially in contact with the fluid in the channel. The pipeline muffler comprises at least two hydrophones, and the at least two hydrophones are arranged upstream of the second pipe body and downstream of the third pipe body respectively.

3. The plumbing silencer of claim 1, wherein The diameter of the through hole is 3-6 mm, the length of the first perforated area is 25%-40% of the total length of the first pipe body, the perforation rate of the first perforated area (1021) is 30%-50%, and the perforation rate of the second perforated area is more than 25%.

4. The line silencer of claim 3, wherein The length of the first perforated area is one third of the total length of the first pipe body.

5. The plumbing silencer of claim 1, wherein The pipeline assembly further comprises a gas guide pipe connected between the acoustic source and the gas storage assembly, and the gas guide pipe is in communication with the inner cavity of the acoustic source and the gas storage cavity.

6. The line silencer of any one of claims 1 to 5, wherein The pipeline muffler further comprises a control module, the control module is electrically connected to the hydrophone and the acoustic source, and is used for controlling the acoustic source to emit acoustic waves according to the noise signal of the hydrophone, and the acoustic waves are used for offsetting the vibration of the noise.

7. The line silencer of any one of claims 1 to 5, wherein The acoustic source comprises: A shell comprising an inner cavity in communication with the gas storage cavity, and the shell is provided with a first open end; A vibrating member arranged at the first open end and making the inner cavity form a sealed cavity; and An actuator connected to the vibrating member and used for driving the vibrating member to vibrate along a vibration direction, the actuator is arranged inside the inner cavity and is in sliding connection with the shell along the vibration direction.

8. The line silencer of claim 7, wherein The acoustic source further comprises: An elastic member arranged inside the inner cavity and applying an elastic force along the vibration direction to the actuator; and A slide rail assembly is connected between the shell and the actuator, and includes a guide rail and a slide block slidingly connected along the vibration direction, one of which is connected with the inner wall of the shell and the other is connected with the outer wall of the actuator.

9. The plumbing silencer of claim 8, wherein The elastic member is a spring, which is elastically abutted between the actuator and the shell.

10. The plumbing silencer of claim 7, wherein The vibration member includes a radiation plate and an elastic support ring located outside the radiation plate, an annular space is formed between the radiation plate and the annular shell, the elastic support ring is fixedly connected with the annular shell and the radiation plate respectively and seals the annular space, and the actuator is fixedly connected with the radiation plate.

11. The plumbing silencer of claim 10, wherein The elastic support ring is made of a high polymer material, and the radiation plate is made of a hard metal or alloy or nylon material.

12. The line silencer of claim 11, wherein The elastic support ring includes an outer ring, an inner ring and at least one protruding part connected between the outer ring and the inner ring, the outer ring is fixedly connected with the annular shell, and the inner ring is fixedly connected with the radiation plate.

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