CN218510300U - Perforated pipe type silencer - Google Patents

Abstract

The utility model discloses a perforation tubular muffler relates to silencing equipment technical field, has solved the problem that the silencer of making an uproar can't satisfy the requirement of making an uproar that falls of nuclear power atmospheric relief valve of falling of current throttle, has improved noise reduction effect and medium throughput, and the concrete scheme is as follows: seted up the casing of a plurality of apertures on the inner wall, the inside of casing is divided in proper order along its length direction has first cavity, second cavity and third cavity, be equipped with the first baffle that has the aperture between first cavity and the second cavity, be equipped with the second baffle between second cavity and the third cavity, first cavity is equipped with the entry spray tube and external intercommunication of aperture through the pipe shaft, communicate through a plurality of first perforated pipes between first cavity and the third cavity, a plurality of apertures have evenly been seted up on the pipe shaft that first perforated pipe is located the second cavity, the third cavity passes through second perforated pipe and second cavity intercommunication, be equipped with the helical structure who is used for guiding the medium in the third cavity.

Description

Perforated pipe type silencer

Technical Field

The utility model belongs to the technical field of the silencing equipment technique and specifically relates to a perforation tubular muffler.

Background

An atmospheric release valve is arranged on a steam loop of the nuclear power plant, and the atmospheric release valve is used for discharging steam to the atmosphere under certain working conditions to realize temperature reduction of the power plant. Because steam is in high temperature and high pressure state and discharge capacity is big, the atmosphere relief valve can produce very big noise to the atmospheric emission in-process, in order to protect the personnel health of power plant personnel and the ecological environment around the power plant, need set up the muffler at the atmosphere relief valve discharge port, with the noise restriction in the scope of requirement.

The noise reduction mechanism of the silencer is various, such as resistive silencing, resistant silencing, impedance composite silencing, diffusion silencing, micro-perforated silencing, small-hole silencing, active silencing and the like, wherein the small-hole silencing (namely throttling noise reduction) is used most.

The inventor finds that the existing throttling noise reduction silencer is mostly used in small-workload scenes such as noise reduction of an engine unit and the like, the working pressure is low, the whole silencer is simple in structure, the noise reduction is realized by grading throttling and matching with a sound absorption material, the discharge amount of a nuclear power atmosphere release valve is more than 300t/h, and the noise reduction requirement of the nuclear power atmosphere release valve cannot be met by utilizing the existing throttling noise reduction silencer.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a perforation tubular muffler, intercommunication each other between first cavity, second cavity, the third cavity to realize the non-classification amortization, improved greatly that the muffler falls the steam volume that allows of making an uproar, utilize diffusion, throttle and resonance principle to fall simultaneously and make an uproar, improved the noise reduction effect greatly, solved the problem that the silencer of making an uproar can't satisfy the requirement of making an uproar of nuclear power atmospheric release valve and fall of current throttle.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

in a first aspect, the embodiment of the utility model provides a perforated pipe type muffler, the casing of having seted up a plurality of apertures on the inner wall, the inside of casing is divided in proper order along its length direction has first cavity, second cavity and third cavity, be equipped with the first baffle that has the aperture between first cavity and the second cavity, be equipped with the second baffle between second cavity and the third cavity, first cavity is equipped with aperture entry spray tube and external intercommunication through the pipe shaft, communicate through a plurality of first perforated pipes between first cavity and the third cavity, a plurality of apertures have evenly been seted up on the pipe shaft that first perforated pipe is located the second cavity, the third cavity passes through second perforated pipe and second cavity intercommunication, be equipped with the helical structure who is used for guiding the medium in the third cavity.

As a further implementation manner, the shell is composed of an outer barrel and an inner barrel fixedly arranged in the outer barrel, a plurality of small holes are uniformly formed in the inner barrel, a gap is formed between the inner barrel and the outer barrel, the first partition plate and the second partition plate penetrate through the inner barrel and are fixedly connected with the outer barrel, and a plurality of small holes are uniformly formed in the part, located in the inner barrel, of the first partition plate.

As a further implementation manner, two ends of the inlet spray pipe are opened, the inlet spray pipe and the shell are coaxially arranged, and the pipe body of the inlet spray pipe in the first cavity is uniformly provided with a plurality of small holes.

As a further implementation mode, the first perforated pipes are horizontally arranged between the first partition plate and the second partition plate, the first perforated pipes are arranged at intervals along the circumferential direction of the first partition plate and the circumferential direction of the second partition plate, and the axis of the inlet spray pipe is overlapped with the axis of a circle enclosed by the first perforated pipes.

As a further implementation, the first partition plate has the same diameter as the small hole on the first perforated pipe.

As a further implementation manner, a third partition plate with a plurality of small holes is fixedly arranged in the third chamber, the third chamber is divided into a first part and a second part by the third partition plate, one end of the second perforated pipe penetrates through the second partition plate to be communicated with the second chamber, and the other end of the second perforated pipe is positioned in the third chamber and penetrates through the third partition plate.

As a further implementation manner, the second perforated pipe and the circle surrounded by the first perforated pipes are coaxially arranged, the outer diameter of the second perforated pipe is smaller than the diameter of the circle surrounded by the first perforated pipes, and a plurality of first small holes are uniformly formed in the pipe body of the second perforated pipe in the first part.

As a further implementation manner, the spiral structure is fixedly arranged in the second part, the spiral structure is a first guide plate which is arranged in a spiral shape, and the first guide plate is fixedly arranged outside the second perforated pipe.

As a further implementation mode, a plurality of second small holes spirally arranged along the axial direction of the second perforated pipe are arranged on the pipe body of the second perforated pipe in the second part, and the second small holes are located in a spiral space surrounded by the first guide plate.

As a further implementation mode, a horn-shaped second guide plate is fixedly arranged at the air outlet end of the shell.

Above-mentioned the utility model has the advantages as follows:

1) The utility model discloses communicate mutually between first cavity, second cavity, the third cavity to realize the non-classification amortization, improved the muffler greatly and fallen the steam volume that the admission was fallen to the noise, utilize diffusion, throttle and resonance principle to fall simultaneously and make an uproar, improved the noise reduction effect greatly.

2) The utility model discloses a plurality of apertures have evenly been seted up on the pipe shaft that the entry spray tube is located first cavity, can be used to the throttle cooling and guide steam and get into first cavity in to utilize the space step-down cooling of first cavity, seted up the aperture on the inner tube simultaneously, can fall through resonant principle and make an uproar.

3) The utility model discloses steam gets into in the second cavity through first baffle to the secondary decompression cooling of steam is realized to the space that utilizes the second cavity, and a plurality of apertures have evenly been seted up on the pipe shaft that first perforation pipe is located the second cavity, and the steam that first perforation pipe erupted and the steam that passes first baffle and get into in the second cavity influence mutually, falls to making an uproar with the principle that utilizes diffusion, active disturbance, resonance, and the inner tube plays the supplementary effect of falling the noise of resonance simultaneously.

4) The utility model discloses the aperture diameter on first baffle and the first perforated pipe is the same to make pressure, the speed that gets into two parts steam in the second chamber the same, guarantee the noise reduction effect through active disturbance's principle.

5) The utility model discloses the second perforated pipe encloses synthetic coaxial setting of circle with a plurality of first perforated pipes, the external diameter of second perforated pipe is less than the diameter of synthetic circle that a plurality of first perforated pipes enclose, steam through first perforated pipe outflow can the homodisperse in all sides of second perforated pipe, it can be rather than the steam interaction of week side to be located the inside second perforated pipe portion spun steam of first portion, the cooperation inner tube, in order to utilize the diffusion, active disturbance, resonance's principle falls and makes an uproar, the noise reduction effect has been improved greatly.

6) The utility model discloses first deflector spiral is arranged to be used for to the direction of steam, increase the circulation route simultaneously, the second aperture is located the spiral space that first deflector encloses, in the second aperture gets into spiral space, thereby with the steam interactive influence in the spiral space, the cooperation inner tube utilizes diffusion, active interference and resonance principle to fall and makes an uproar, in order to improve noise elimination effect.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a schematic cross-sectional view of a perforated pipe muffler according to one or more embodiments of the present invention;

in the figure: the space or size between each other is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;

wherein, 1, an inlet nozzle; 2. a first chamber; 3. a first separator; 4. a first perforated tube; 5. a second chamber; 6. a second separator; 7. a second perforated tube; 8. a third chamber; 9. a third partition plate; 10. a first guide plate; 11. an outer cylinder; 12. an inner barrel; 13. a second guide plate.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Just as the background art introduces, the silencer of making an uproar falls in current throttle is used for the engine block to fall among the little work load scene such as make an uproar, and operating pressure is less, and silencer overall structure is simple, can realize the noise elimination through hierarchical throttle and cooperation sound absorbing material, and nuclear power atmosphere release valve emission is more than 300t/h, utilizes the silencer of making an uproar falls in current throttle can not satisfy the problem of the demand of making an uproar that falls of nuclear power atmosphere release valve, for solving above-mentioned problem, the utility model provides a perforated pipe formula muffler.

Example 1

The utility model discloses an in the typical embodiment, as shown in fig. 1, a perforation tubular muffler is proposed, include, urceolus 11, inner tube 12, wherein, inner tube 12 is fixed to be set up in urceolus 11 in order to constitute the casing of silencer jointly, evenly is equipped with a plurality of apertures along its hoop and axial on the inner wall of casing, and the one end of casing is the inlet end, and the inlet end is equipped with entry spray tube 1, and the other end is for giving vent to anger the end.

The interior of the housing is divided in its length direction into a first chamber 2, a second chamber 5 and a third chamber 8 in that order by means of partition walls for noise reduction of the steam.

A plurality of small holes are uniformly formed in the inner cylinder 12 to assist in noise reduction with steam resonance, a gap is formed between the inner cylinder 12 and the outer cylinder 11, and the partition plate penetrates through the inner cylinder 12 and is fixedly connected with the inner wall of the outer cylinder 11.

Inlet nozzle 1 is both ends open-ended tubular structure, inlet nozzle 1 is located the central point department of putting of casing one end (inlet nozzle 1 and the coaxial setting of casing promptly), inlet nozzle 1's one end stretches into in first cavity 2, the other end stretches out the casing, in order to be used for guiding steam to get into first cavity 2, thereby utilize the space of first cavity 2 to step down the temperature, inlet nozzle 1 is located on the pipe shaft in first cavity and evenly is equipped with a plurality of apertures that are used for spraying steam along its axial and hoop, the aperture diameter is 10-15mm, in order to fall the noise through the principle of throttle diffusion.

Steam in the first chamber 2 is firstly sprayed out through small holes on the pipe body of the inlet spray pipe 1 so as to reduce noise by utilizing the throttling diffusion principle, and the sprayed steam resonates with the small holes on the part of the inner cylinder 12 in the first chamber 2 so as to further reduce noise.

A first partition plate 3 is arranged between the first chamber 2 and the second chamber 5, the part of the first partition plate 3, which is positioned between the inner barrel 12 and the outer barrel 11, is not provided with small holes, and the part, which is positioned inside the inner barrel 12, is uniformly provided with a plurality of small holes with the diameter of 8-10mm so as to allow steam to pass through the first partition plate 3 to enter the second chamber 5, thereby realizing throttling and noise reduction, and simultaneously realizing secondary pressure reduction and temperature reduction of the steam by utilizing the space of the second chamber 5.

A second partition plate 6 is arranged between the second chamber 5 and the third chamber 8, no small hole is formed in the second partition plate 6 for blocking steam, and the second partition plate 6 also penetrates through the inner cylinder 12 and is fixedly connected with the inner wall of the outer cylinder 11 for blocking steam in a gap between the outer cylinder 11 and the inner cylinder 12 from flowing into an adjacent chamber.

Similarly, the steam passing through the first partition 3 from the first chamber 2 into the second chamber 5 resonates with the portion of the inner tube 12 located in the second chamber 5 to reduce noise.

Be equipped with a plurality of first perforated pipes 4 in the second chamber 5 to be used for communicateing first chamber 2 and third chamber 8, specifically, first baffle 3 and first chamber 2 intercommunication are passed to the one end of first perforated pipe 4, and second baffle 6 and third chamber 8 intercommunication are passed to the other end of first perforated pipe 4.

The first perforated pipes 4 are horizontally arranged between the first partition plates 3 and the second partition plates 6, the first perforated pipes 4 are arranged at intervals along the circumferential direction of the first partition plates 3 and the second partition plates 6, and the pipe body parts, located inside the second chamber 5, of the first perforated pipes 4 are evenly provided with a plurality of small holes with the diameter of 8-10mm along the axial direction and the circumferential direction of the pipe body parts.

A part of steam in the first chamber 2 passes through the first partition plate 3 and enters the second chamber 5, the other part of steam enters the first perforated pipe 4, part of steam in the first perforated pipe 4 flows into the third chamber 8 through the guide of the first perforated pipe 4, part of steam can be sprayed into the second chamber 5 through the small holes in the pipe body of the first perforated pipe 4, and the steam sprayed out of the first perforated pipe 4 and the steam which passes through the first partition plate 3 and enters the second chamber 5 are influenced mutually so as to reduce noise by using the principles of diffusion, active interference and resonance.

The diameters of the small holes on the first partition plate 3 and the first perforated pipe 4 are the same, so that the pressure and the speed of the two parts of steam entering the second chamber 5 are the same, and the noise reduction effect is ensured by the principle of active interference.

The axial line of the inlet nozzle 1 coincides with the axial lines of the first partition plate 3 and the second partition plate 6, and it can also be understood that the axial line of the inlet nozzle 1 coincides with the axial line of a circle enclosed by the first perforated pipes 4, and the outer diameter of the inlet nozzle 1 is smaller than the diameter of the circle enclosed by the first perforated pipes 4, so that steam can uniformly enter all the first perforated pipes 4.

A third partition plate 9 is fixedly arranged in the middle of the inside of the third chamber 8, and the third partition plate 9 divides the third chamber 8 into a first part and a second part, wherein the first part is positioned between the second partition plate 6 and the third partition plate 9.

Still be equipped with the second perforated pipe 7 that a level set up in the third chamber 8, second perforated pipe 7 is used for communicateing second chamber 5 and third chamber 8, and is specific, and second baffle 6 and second chamber 5 intercommunication are passed to the one end of second perforated pipe 7, and the other end is located third chamber 8 and passes third baffle 9, and steam accessible second perforated pipe 7 in the second chamber 5 gets into in the third chamber 8.

The pipe body of the second perforated pipe 7 positioned in the first part is uniformly provided with a plurality of small holes with the diameter of 3-5mm along the circumferential direction and the axial direction of the pipe body so as to carry out small hole injection frequency shift and noise reduction, steam in the second perforated pipe 7 can enter the first part through the small holes on the pipe body, and the steam entering the first part can also react with the small holes on the inner cylinder 12 in the first part so as to reduce noise by utilizing the diffusion principle and the resonance principle.

The second perforated pipe 7 is arranged coaxially with the inlet nozzle 1, that is, the second perforated pipe 7 is also arranged coaxially with a circle surrounded by the plurality of first perforated pipes 4, and the outer diameter of the second perforated pipe 7 is smaller than the diameter of the circle surrounded by the first perforated pipes 4, it can also be understood that the plurality of first perforated pipes 4 are arranged outside the second perforated pipes 7 and at intervals along the circumferential direction of the second perforated pipes 7, so that the steam flowing out through the first perforated pipes 4 can be uniformly dispersed on the circumferential side of the second perforated pipes 7, and the steam sprayed from the part of the second perforated pipes 7 positioned inside the first part can interact with the steam on the circumferential side thereof, so as to reduce noise by using the principles of diffusion, active interference and resonance.

The part of the third partition plate 9 between the inner cylinder 12 and the outer cylinder 11 is not provided with small holes, and the part of the third partition plate 9 inside the inner cylinder 12 is uniformly provided with a plurality of small holes with the diameter of 3-5mm, so that steam in the first part is allowed to pass through the third partition plate 9 to enter the second part, and the small hole injection frequency shift noise reduction is carried out.

A first guide plate 10 is fixedly arranged in the second part of the third chamber 8, the first guide plate 10 is fixedly arranged outside the second perforated pipe 7, the first guide plate 10 is spirally arranged along the axial direction of the second perforated pipe 7 for guiding steam, meanwhile, the circulation path is increased, the steam in the first part enters the second part after passing through the third partition plate 9, and flows to the air outlet end and is discharged under the guiding of the first guide plate 10.

The tube body of the second perforated tube 7 located inside the second part is also provided with a plurality of small holes, so that for convenience of distinguishing, the small holes of the second perforated tube 7 located on the tube body in the first part are called first small holes, the small holes of the second perforated tube 7 located on the tube body in the second part are called second small holes, the second small holes are spirally arranged along the axial direction of the second perforated tube 7, the spiral direction is the same as that of the first guide plate 7, and the second small holes are located in a spiral space surrounded by the first guide plate 10.

The first guide plate 10 is not provided with small holes, steam in the first part enters the spiral space after passing through the third partition plate 9, the steam spirally flows under the guide effect of the first guide plate 10, meanwhile, the steam in the second chamber 5 enters the second perforated pipe 7, one part enters the first part through the first small holes to reduce noise and the other part enters the spiral space through the second small holes to interactively influence the steam in the spiral space, and the noise is reduced by using the diffusion, active interference and resonance principles.

A second guide plate 13 is fixedly arranged at the air outlet end of the shell, and the second guide plate 13 is horn-shaped and used for guiding steam out to the atmosphere so as to meet the requirement of noise reduction.

Adopt the hierarchical amortization of non-in this embodiment, improved the silencer greatly and fallen the steam volume of allowing of making an uproar, whole resistance is little, and the noise reduction effect is obvious, and the silencer wholly adopts stainless steel material to make, is applicable to the high temperature highly compressed steam medium and falls and make an uproar, and the maintenance cost is low.

It should be noted that the small holes in the present embodiment are all through hole structures, i.e. penetrate through the corresponding structure walls respectively.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a perforated pipe type muffler, a serial communication port, the casing of having seted up a plurality of apertures on the inner wall, the inside of casing is divided in proper order along its length direction has first cavity, second cavity and third cavity, be equipped with the first baffle that has the aperture between first cavity and the second cavity, be equipped with the second baffle between second cavity and the third cavity, first cavity is equipped with aperture entry spray tube and external intercommunication through the pipe shaft, communicate through a plurality of first perforated pipes between first cavity and the third cavity, a plurality of apertures have evenly been seted up on the pipe shaft that first perforated pipe is located the second cavity, the third cavity passes through second perforated pipe and second cavity intercommunication, be equipped with the helical structure who is used for guiding the medium in the third cavity.

2. The perforated pipe silencer of claim 1, wherein the housing comprises an outer cylinder and an inner cylinder fixedly disposed inside the outer cylinder, the inner cylinder is uniformly provided with a plurality of small holes, a gap is provided between the inner cylinder and the outer cylinder, the first partition and the second partition penetrate through the inner cylinder and are fixedly connected with the outer cylinder, and the part of the first partition located inside the inner cylinder is uniformly provided with a plurality of small holes.

3. The perforated pipe silencer of claim 1, wherein the inlet nozzle has two open ends, the inlet nozzle is coaxial with the casing, and a plurality of small holes are uniformly formed in the pipe body of the inlet nozzle in the first chamber.

4. The perforated pipe silencer of claim 1, wherein the first perforated pipe is horizontally disposed between the first partition and the second partition, the first perforated pipes are circumferentially spaced apart from the first partition and the second partition, and an axis of the inlet nozzle coincides with an axis of a circle enclosed by the first perforated pipes.

5. The perforated pipe silencer of claim 1, wherein the first baffle is the same diameter as the perforations in the first perforated pipe.

6. The perforated pipe muffler of claim 1, wherein a third partition having a plurality of small holes is fixed in the third chamber, the third chamber is divided into a first portion and a second portion by the third partition, one end of the second perforated pipe passes through the second partition to communicate with the second chamber, and the other end of the second perforated pipe is located in the third chamber and passes through the third partition.

7. The perforated pipe silencer of claim 6, wherein the second perforated pipe is disposed coaxially with the circle surrounded by the first perforated pipes, the second perforated pipe has an outer diameter smaller than the circle surrounded by the first perforated pipes, and the pipe body of the second perforated pipe in the first portion is uniformly provided with the first small holes.

8. The perforated pipe silencer of claim 6, wherein the spiral structure is fixedly disposed within the second section, the spiral structure being a first guide plate disposed in a spiral configuration, the first guide plate being fixedly disposed outside the second perforated pipe.

9. The perforated pipe silencer of claim 8, wherein the second perforated pipe is provided with a plurality of second small holes spirally arranged along the axial direction of the second perforated pipe on the pipe body of the second perforated pipe, and the second small holes are located in the spiral space surrounded by the first guide plate.

10. The perforated pipe silencer of claim 1, wherein a second flared deflector is secured to the outlet end of the housing.

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