CN217003345U - Pipe silencer - Google Patents

Abstract

The application discloses pipeline muffler, it includes the outer tube, the outer tube includes straight tube portion and links firmly the first central variable diameter portion in straight tube portion one end be provided with outer loop noise elimination portion in the straight tube portion and set up the inner ring noise elimination portion of outer loop noise elimination portion axial inboard, wherein, outer loop noise elimination portion including be the outer loop noise elimination screen panel that the tubulose set up and link firmly in the outer loop screen cover of outer loop noise elimination screen panel one side, inner ring noise elimination portion including be the inner ring noise elimination screen panel that the tubulose set up and link firmly in the inner ring screen cover of inner ring noise elimination screen panel one side. The silencer in the application is suitable for being arranged on a fluid pipeline, particularly a gas pipeline, and can be generally directly arranged at the outlet of a flow control valve, so that the problem of noise generated when gas flows through the valve is solved and eliminated.

Description

Pipe silencer

Technical Field

The present application relates to muffling devices, and more particularly to muffling devices disposed on pipes.

Background

The pipeline noise refers to the noise generated by the friction collision and disturbance of medium flow inside the pipeline. Pipe noise typically includes blocking noise, grating noise, and valve noise. Blocking noise is noise generated by dragging or lifting an object when airflow interacts with a reinforcing beam of an obstacle support, a guide plate and the like in a pipeline. The grill noise is noise generated when an air flow passes through a grill, a diffuser, or an insert plate and is blocked by an obstacle from the air flow. Valve noise is generated due to the relatively large pressure ratio across the valve, which is caused by the choking of the air flow under such conditions.

When the caliber of the pipeline with the flow regulating valve is small, the outlet end of the valve can generate the phenomenon of intensified flow velocity, the pipeline is scream, the noise is large, and the vibration frequency is high.

SUMMERY OF THE UTILITY MODEL

One of the objectives of the present application is to provide a pipe silencer that can solve the squeal and noise problems of the pipe with a smaller diameter.

For this reason, some embodiments of this application provide a pipeline muffler, and it includes the outer tube, the outer tube includes straight tube portion and links firmly the first central variable diameter portion of straight tube portion one end be provided with outer loop noise elimination portion in the straight tube portion the outer loop noise elimination portion is provided with inner ring noise elimination portion to the inboard, wherein outer loop noise elimination portion including be pipy outer loop noise elimination screen panel and link firmly in the outer loop shroud cap of outer loop noise elimination screen panel one side, inner ring noise elimination portion including be pipy inner ring noise elimination screen panel and link firmly in the inner loop shroud cap of inner ring noise elimination screen panel one side.

In some embodiments of the present application, the inner ring silencer is further disposed radially inward of the inner ring silencer.

In some embodiments of the present application, the first central reducer portion has a first interface section that mates with the fluid inlet, and a first tapered section that connects between the straight tube portion and the first interface section, wherein the first interface section has an overall radial dimension that is smaller than the straight tube portion, and the first tapered section connects it with the straight tube portion.

In some embodiments of the present application, the inner ring acoustic screen of the inner ring acoustic portion is in the form of a tubular body that is expanded into a plate-like body having an array of through holes, the plate-like body of the inner ring acoustic screen having the array of through holes forming a first radial acoustic damping device of the acoustic damper; the inner ring mesh enclosure cover of the inner ring silencing part is fixedly connected to one end, far away from the inlet of the silencer, of the tubular inner ring silencing mesh enclosure, and the outer contour of the inner ring mesh enclosure cover can be the same as or corresponding to the end face of the tubular inner ring silencing mesh enclosure; the inner ring net cover cap is of a plate-shaped body structure with through holes, and the plate-shaped body with the through hole array of the inner ring net cover cap forms a first axial silencing device of the silencer.

In some embodiments of the present application, the outer ring sound-deadening mesh of the outer ring sound-deadening portion takes the form of a pipe body that is expanded onto a plate-like body having an array of through-holes, the plate-like body having the array of through-holes of the outer ring sound-deadening mesh forming the second radial sound-deadening means of the silencer.

In some embodiments of the present application, the outer ring mesh cover of the outer ring silencing part is fixedly connected to one end of the tubular outer ring silencing mesh cover far away from the muffler inlet, and the outer contour of the outer ring silencing mesh cover is the same as or corresponds to the end face of the tubular outer ring silencing mesh cover; the outer ring net cover cap is of a plate-shaped body structure with through holes, and the plate-shaped body with the through hole array of the outer ring net cover cap forms a second axial silencing device of the silencer.

In some embodiments of the present application, the sum of the areas of the openings of the inner ring acoustic mesh and the inner ring mesh cap is greater than or equal to six times the cross-sectional area of the fluid inlet.

In some embodiments of the present application, the sum of the areas of the openings of the outer ring sound-deadening screen and the outer ring screen cover is greater than or equal to six to eight times the cross-sectional area of the fluid inlet.

In some embodiments of the present application, the outer ring sound-deadening portion is fixedly attached to an inner surface of the first central diameter-varying portion by an outer ring sound-deadening mesh.

In some embodiments of this application, the tip of keeping away from outer loop screen cover through with outer loop noise elimination screen panel links firmly the first tapering section at first central variable diameter portion, link firmly the position for keeping away from the juncture of first tapering section and first interface section, and with one section distance of fixed position interval of inner ring noise elimination screen panel.

The silencer in this application is applicable to on fluid pipeline, especially on the gas pipeline, generally can directly install the export at flow control valve, solves the noise problem that eliminates gas and flow through the valve and produce.

Drawings

FIG. 1 is a perspective diagrammatic illustration of a pipe silencer according to an embodiment of the present application;

FIG. 2 is a structural cross-sectional view of a pipe silencer according to an embodiment of the present application;

FIG. 3A is an axial side view of an inner ring sound attenuation screen in a pipe silencer according to an embodiment of the present application;

fig. 3B is an expanded view of the structure of the inner ring sound attenuation screen in the pipe muffler according to the embodiment of the present application;

FIG. 3C is a structural axial side view of an inner looped network cover in a pipe silencer according to an embodiment of the present application;

FIG. 4A is an axial side view of an outer ring sound-deadening screen in a pipe silencer according to an embodiment of the present application;

fig. 4B is an expanded view of the structure of the outer ring sound-deadening screen in the pipe muffler according to the embodiment of the present application;

fig. 4C is a structural axial side view of an outer annular mesh cover in a pipe silencer according to an embodiment of the present application.

Detailed Description

As shown in fig. 1 and 2, the muffler for the pipeline according to the embodiment of the present application includes an outer sleeve 100, the outer sleeve 100 includes a straight pipe portion 4 and links firmly a first central variable diameter portion 2A in straight pipe portion 4 one end be provided with outer loop noise elimination portion in the straight pipe portion 4 and set up inner ring noise elimination portion in the outer loop noise elimination portion, wherein, outer loop noise elimination portion by be the outer loop noise elimination screen panel 5 of tubulose setting and link firmly in outer loop screen cover 7 of outer loop noise elimination screen panel 5 one side constitutes, inner ring noise elimination portion by be the inner ring noise elimination screen panel 6 of tubulose setting and link firmly in inner ring screen cover 8 of inner ring noise elimination screen panel 6 one side constitutes.

The straight tube portion 4 may be a tube body having a substantially hollow cylindrical shape or a hollow arbitrary polygonal cylindrical shape, and has a tube cavity 41. The straight tube portion 4 may be in the form of a tube body having another three-dimensional shape, but it is preferable that the inner surface of the tube cavity has no abrupt change in shape, and particularly, has a continuous smooth inner surface.

The first central diameter-changing portion 2A is used for connecting a fluid F from a fluid inlet E to the straight tube portion 4, and in some embodiments, the first central diameter-changing portion 2A has a first interface section 2A1 matching the fluid inlet and a first tapered section 2A2 connected between the straight tube portion 4 and the first interface section 2A1, wherein the first interface section 2A1 has a smaller overall radial dimension than the straight tube portion 4, and therefore, a first tapered section 2A2 is required for connecting the straight tube portion 4. The transition between the first interface section 2a1, the first tapered section 2a2 and the straight tube portion 4 may be an angular transition or a smooth curved transition, and the inner surfaces of the three preferably form a continuous smooth inner surface.

As shown in fig. 2, 3A, 3B, 3C, the inner ring sound-deadening mesh 6 of the inner ring sound-deadening portion may take the form of a tubular body such as a hollow cylinder or a hollow arbitrary polygonal cylinder, whose development is shown in fig. 3B, as a plate-like body having an array of through holes, which may be a metal plate or a synthetic material plate, which may be regularly or irregularly distributed, uniformly or non-uniformly distributed on the plate-like body, and the plate-like body having the array of through holes 61 of the inner ring sound-deadening mesh 6 forms a first radial sound-deadening means of the silencer, which can eliminate, to some extent, noise generated when a fluid, such as a gas flow, moves in the radial direction. The inner ring mesh enclosure cover 8 of the inner ring sound-deadening portion may be welded to an end of the tubular inner ring sound-deadening mesh enclosure 6 remote from the muffler inlet, and the outer contour thereof may be the same as or correspond to the end surface of the tubular inner ring sound-deadening mesh enclosure 6. The inner ring screen cover 8 may be, as shown in fig. 3C, a plate-shaped body structure with through holes, which may be a metal plate or a synthetic material plate, and the through holes may be single through holes or irregularly distributed through holes or through hole arrays, which may be uniformly or non-uniformly distributed on the plate-shaped body, and the plate-shaped body with through hole arrays of the inner ring screen cover 8 forms a first axial silencing device of the silencer, which may eliminate fluid, such as noise generated when the gas flow moves in the axial direction, to some extent.

In the embodiment shown in the figures, the aperture of the through hole 81 in the inner ring screen cover 8 is larger than the aperture of the inner ring sound-deadening screen 6 with the through hole 61.

The inner ring sound-deadening portion may be secured to the inner surface of the first central variable-diameter portion 2A by the inner ring sound-deadening mesh cap 6, for example, by welding the end of the inner ring sound-deadening mesh cap 6 remote from the inner ring mesh cap 8 to any position of the first tapered section 2A2 of the first central variable-diameter portion 2A, particularly a position near the interface of the first tapered section 2A2 and the first interface section 2A1, or a position near the interface of the first tapered section 2A2 and the first interface section 2A1, and may be disposed near the interface of the first tapered section 2A2 and the first interface section 2A1 or a position near the interface of the first tapered section 2A2 and the first interface section 2A1 to facilitate the direct flow of fluid into the inner ring sound-deadening portion.

The outer ring muffling portion is provided at a position radially and axially outside the inner ring muffling portion, i.e., at a position where the radial dimension and the axial dimension are larger.

Similarly, as shown in fig. 2, 4A, 4B and 4C, the outer ring sound-deadening screen 5 of the outer ring sound-deadening portion may take the form of a tubular body such as a hollow cylinder or a hollow arbitrary polygonal cylinder, an expanded view of which is shown in fig. 4B, on a plate-like body having an array of through holes, which may be a metal plate or a synthetic material plate, the array of through holes may be regularly or irregularly distributed, uniformly or non-uniformly on the plate-like body, and the plate-like body having the array of through holes of the outer ring sound-deadening screen 5 forms second radial sound-deadening means of the silencer, which can deaden fluid, such as noise generated when the gas flow moves in the radial direction, to some extent. The outer ring mesh enclosure 7 of the outer ring sound-deadening portion may be welded to an end of the tubular outer ring sound-deadening mesh enclosure 5 away from the muffler inlet, and the outer contour thereof may be the same as or correspond to the end surface of the tubular outer ring sound-deadening mesh enclosure 5. The outer ring mesh cover 7 may be a plate-shaped body structure with through holes, as shown in fig. 4C, the plate-shaped body may be a metal plate or a synthetic material plate, the through holes may be a single through hole or a plurality of through holes or through hole arrays distributed irregularly, the single through hole or the through hole arrays may be distributed on the plate-shaped body uniformly or non-uniformly, and the plate-shaped body with the through hole arrays of the outer ring mesh cover 7 forms the second axial silencing means of the silencer, which can eliminate fluid, such as noise generated when the gas flow moves in the axial direction, to some extent.

In the embodiment shown in the figure, the hole diameter of the through hole 71 on the outer ring mesh cover 7 is larger than the hole diameter of the outer ring sound-deadening mesh 5 having the through hole 51. The aperture on the inner ring or the outer ring screen cover is larger than that of the screen cover, so that the through-flow of a part of main fluid can be better stabilized, and the through holes arranged on the silencing screen cover are characterized in that the single holes are small but the number of the holes is large, so that the overall contact area is large, the seismic sources generated by the holes with single section are dispersed, and the noise can be effectively reduced.

In the embodiment of the present application, the aperture of the through hole 71 on the outer ring screen cover 7 may be equal to or unequal to the aperture of the through hole 81 on the inner ring screen cover 8. Similarly, the hole diameter of the outer ring sound attenuation screen 5 having the through holes 51 may be equal to or different from the hole diameter of the inner ring sound attenuation screen 6 having the through holes 61. In order to achieve the optimal sound attenuation effect, it is preferable that the sum of the areas of the openings of the inner ring sound attenuation mesh and the inner ring mesh cap is greater than or equal to 6 times the sectional area of the fluid inlet E, and the sum of the areas of the openings of the outer ring sound attenuation mesh and the outer ring mesh cap is greater than or equal to 6 to 8 times the sectional area of the fluid inlet E.

The outer ring noise elimination portion may be fixedly connected to the inner surface of the first central diameter-varying portion 2A through the outer ring noise elimination mesh enclosure 5, for example, by welding an end portion of the outer ring noise elimination mesh enclosure 5, which is far away from the outer ring mesh enclosure 7, to an arbitrary position of the first taper section 2A2 of the first central diameter-varying portion 2A. The fastening position, in particular the position remote from the intersection of the first conical section 2a2 and the first interface section 2a1, is spaced apart from the fastening position of the inner ring sound-damping mesh enclosure 6.

As shown in fig. 1 and 2, in some embodiments of the present application, the lumen 41 of the straight tube portion 4 may communicate with at least one instrumentation tube fixed to the straight tube portion 4, such as a first instrumentation tube 3A and a second instrumentation tube 3B. The straight tube portion 4 may be perforated to connect instrumentation tubes, and the first instrumentation tube 3A, the second instrumentation tube 3B may communicate with any of the instrumentation tubes to detect parameters such as pressure of the lumen 41 of the straight tube portion.

In some embodiments of the present application, as shown in fig. 1 and 2, as part of the outer sleeve 100, a first interface flange 1A may be connected or provided at the first interface section 2A1 of the first central tapered portion 2A for connection with an external fluid source. It will of course be appreciated that the first flange 1A is not essential and may be connected to an external fluid application device or fluid line either directly or via other interface means.

In some embodiments of the present application, as part of the outer sleeve 100, a second flange 1B may be connected to an end of the straight pipe portion 4 opposite to an end connected to the first central diameter-changing portion 2A to connect to an external fluid application device or a fluid line. It will of course be appreciated that the second flange is not essential and may be connected to an external fluid application or fluid line either directly or via other interface means.

In other embodiments of the present application, as shown in fig. 1 and 2, a second central variable-diameter portion 2B may be connected, for example welded, at an end of the straight pipe portion 4 opposite to an end connected to the first central variable-diameter portion 2A, the second central variable-diameter portion 2B including a second interface section 2B1 and a second tapered section 2B2 connected to the second interface section 2B 1. The second tapered section 2B2 may further be connected to a second flange 1B or other interface device for connection to an external fluid application device or fluid line. It should be understood that the second central diameter-varying portion 2B and/or the second flange 1B are not essential and may be connected to an external fluid application device or fluid line, either directly or through other interface means.

The utility model provides a muffler accomplishes the mouth at the welding, sweeps totally, and the connection of inspection instrument pipe is beaten the no residue of hole department.

In addition to the above-described basic structure, the silencer structure in the present application can be further improved in both sound insulation and sound absorption.

The various measures for sound attenuation control are mainly proposed aiming at three aspects of sound source, propagation path and receptor. Therefore, considering mainly the sound source and the propagation path of sound, combining with the field practice, the technique using sound attenuation can be summarized as:

1) and (3) sound insulation: sound insulation is a relatively traditional method in noise control, and the principle of the method is that a sound source is sealed by a material with high density and high specific gravity (for example, a sound insulation wall, a sealed metal space and the like are used for isolating the sound source from an external silent space), so that the noise of the sound source does not affect other environments and the like. In order to realize good sound insulation, the wall thickness of the outer sleeve in some embodiments of the application is set to be not lower than SCH40, and the American standard ASME36.1 standard pipeline wall thickness correspondence table can be queried to obtain the specific thickness of the outer sleeve, so that the arrangement effectively increases the pipeline wall thickness and improves the sound insulation quality. In the embodiment that provides first flange andor second flange, the mechanism of flange joint who sets up more is favorable to on-the-spot later stage's additional outsourcing soundproof cotton's upgrading scheme, is favorable to reaching good sound insulation effect in addition.

2) Sound absorption: in sound absorption, a sound absorbing material is added on the interfaces of a sound space, so that when waves in the air enter the interfaces, sound energy is converted into heat energy to be dissipated by internal loss of the sound absorbing material, reflection of sound, namely reverberation in the sound space, is avoided, and the sound pressure level in an ascending space is reduced. The technology mainly aims at the treatment of reverberant sound, and has obvious effect on high-frequency sound. The sound absorption materials and the sound absorption structures have various types and are divided into porous sound absorption materials and resonance sound absorption structures according to the material structure conditions. The sound absorption material mainly has the functions of shortening and adjusting the indoor reverberation time and eliminating echo to improve the indoor listening and listening conditions; reducing the sound pressure level in the room; as a raw material for duct liners or muffler pieces to reduce noise of ventilation systems; or the light sound insulation structure and the inner surface of the sound insulation cover are used as auxiliary materials to improve the sound insulation of the member. When the sound absorption material and the sound absorption structure are selected in the noise control engineering, in addition to considering the acoustic characteristics, the comprehensive evaluation must be carried out from other aspects. Different types of sound-absorbing materials have different sound-absorbing properties, and the same type of sound-absorbing material has different sound-absorbing properties due to different using methods. In order to realize sound absorption and silencing, the silencer in the embodiment of the application is additionally provided with an inner layer mesh enclosure and an outer layer mesh enclosure inside the outer sleeve 100, the size and/or the position of the mesh enclosure opening are/is set, three factors of pipeline circulation cannot be influenced, the sound pressure level in a sound space is reduced from the inside, and a good silencing effect is achieved. In order to realize the optimal sound attenuation effect, the sum of the areas of the openings of the inner ring sound attenuation mesh and the inner ring mesh cover is greater than or equal to 6 times of the sectional area of the fluid inlet E, and the sum of the areas of the openings of the outer ring sound attenuation mesh and the outer ring mesh cover is greater than or equal to 6 to 8 times of the sectional area of the fluid inlet.

Further, some embodiments of the present application provide an instrumentation tube as an interface to add a sensing element. Like this like pressure transmitter, detecting element such as manometer all can install on pipeline muffler equipment for the product is functional, and cooperation pipe-line system's after examine pressure can be analyzed and whether there is impurity in the gas that reachs in the pipeline, whether there is the potential safety hazard of revealing a little.

The silencer of the embodiment of the application is applicable to fluid pipelines, is particularly applicable to gas pipelines, and can effectively reduce vibration frequency and eliminate noise under the working conditions of pipe diameter reduction, pressure rise of a flow regulating valve port, aggravation of flow speed, whistle generation, noise generation, vibration frequency and the like.

In addition, the muffler of this application can also possess the upgrading scheme of on-the-spot increase soundproof cotton with regard to the structure, and it is convenient to dismantle, and the leakproofness is strong, can install the measurement analysis instrument, and is functional strong.

Claims (10)

1. A pipe silencer, characterized by: including the outer tube, the outer tube includes straight tube portion and links firmly the first central variable diameter portion of straight tube portion one end be provided with outer loop noise elimination portion in the straight tube portion the outer loop noise elimination portion is provided with inner ring noise elimination portion to the axial inboard, wherein outer loop noise elimination portion including be pipy outer loop noise elimination screen panel and link firmly in the outer loop screen cover of outer loop noise elimination screen panel one side, inner ring noise elimination portion including be pipy inner ring noise elimination screen panel and link firmly in the inner ring screen cover of inner ring noise elimination screen panel one side.

2. The pipe silencer of claim 1, wherein: the inner ring silencing part is also arranged on the radial inner side of the outer ring silencing part.

3. The duct silencer of claim 1, wherein: the first central diameter-variable portion is provided with a first interface section matched with the fluid inlet and a first taper section connected between the straight pipe part and the first interface section, wherein the overall radial dimension of the first interface section is smaller than that of the straight pipe part, and the first taper section connects the first interface section with the straight pipe part.

4. The duct silencer of claim 1, wherein: the inner ring silencing mesh enclosure of the inner ring silencing part is in a pipe body form and is expanded into a plate-shaped body with a through hole array, and the plate-shaped body with the through hole array of the inner ring silencing mesh enclosure forms a first radial silencing device of the silencer; the inner ring mesh cover of the inner ring silencing part is fixedly connected to one end, far away from the inlet of the silencer, of the tubular inner ring silencing mesh cover, and the outer contour of the inner ring silencing mesh cover can be the same as or corresponds to the end face of the tubular inner ring silencing mesh cover; the inner ring net cover cap is of a plate-shaped body structure with through holes, and the plate-shaped body with the through hole array of the inner ring net cover cap forms a first axial silencing device of the silencer.

5. The pipe silencer of claim 1, wherein: the outer ring silencing net cover of the outer ring silencing part is in a pipe body form and is unfolded to be a plate-shaped body with a through hole array, and the plate-shaped body with the through hole array of the outer ring silencing net cover forms a second radial silencing device of the silencer.

6. The pipe silencer of claim 5, wherein: the outer ring screen cover of the outer ring silencing part is fixedly connected to one end, far away from the inlet of the silencer, of the tubular outer ring silencing screen, and the outer contour of the outer ring silencing screen cover is the same as or corresponds to the end face of the tubular outer ring silencing screen; the outer ring net cover cap is of a plate-shaped body structure with through holes, and the plate-shaped body with the through hole array of the outer ring net cover cap forms a second axial silencing device of the silencer.

7. The duct silencer of claim 1, wherein: the sum of the areas of the openings of the inner ring silencing net cover and the inner ring net cover is more than or equal to six times of the sectional area of the fluid inlet.

8. The duct silencer of claim 1, wherein: the sum of the areas of the openings of the outer ring silencing net cover and the outer ring net cover is more than or equal to six times of the sectional area of the fluid inlet.

9. The pipe silencer of claim 1, wherein: the outer ring silencing part is fixedly connected to the inner surface of the first center diameter-changing part through an outer ring silencing net cover.

10. The duct silencer of claim 9, wherein: the end part, far away from the outer ring screen cover, of the outer ring noise elimination screen cover is fixedly connected with the first taper section of the first central variable diameter part, the fixedly connected position is a position far away from the junction of the first taper section and the first interface section, and the fixedly connected position of the outer ring noise elimination screen cover is separated from the fixed position of the inner ring noise elimination screen cover by a certain distance.

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