CN213018308U - Silencer - Google Patents

Abstract

The utility model relates to a silencer technical field discloses a silencer, include: the inner cavity of the outer pipe is communicated with an air outlet of an external pressure container, a plurality of first through holes are formed in the pipe wall of the outer pipe, and when the silencer is used, the silencer is immersed in the container filled with liquid silencing media. The utility model discloses with the silencer submergence in liquid noise elimination medium, can reduce the size that only liquid boiling sound was made to the noise of spouting. The noise level is controlled by adjusting the liquid level of the liquid silencing medium in the container, the more the liquid content is, the smaller the boiling sound is, if the liquid is enough, the noise can be completely reduced to the degree that the human ear can not hear, the silencing effect is excellent, meanwhile, the materials are easy to obtain, the structure is simple, the manufacturing process flow is greatly simplified, the cost is saved, and the pressure-relief type liquid silencing device is particularly suitable for exhausting and reducing the noise in the pressure-relief stage of a pressure test.

Description

Silencer

Technical Field

The utility model belongs to the technical field of the silencer, especially, relate to a silencer.

Background

The air pressure test is one of pressure tests and is commonly applied to manufacturing of pressure vessels. When the pressure test enters the pressure relief stage, the air in the pressure container needs to be discharged through the exhaust port, and at the moment, the high-pressure air impacts the surrounding air, so that huge noise can be generated, and the requirement of the national environmental protection standard is seriously exceeded.

For such noise, noise reduction is generally performed by reducing the airflow velocity, dispersing the pressure drop, changing the noise spectrum (i.e., making the peak frequency fall in the audio region where the human ear is not perceptually sensitive), and so on, and thus, various types of mufflers have also been produced, such as: capacity expansion and pressure reduction, capacity expansion and speed reduction type mufflers, throttling and pressure reduction type mufflers, small hole injection type mufflers and the like.

Under the condition that the exhaust pressure and the airflow speed are very high, a common single-function or low-grade muffler cannot be applied, so that a plurality of compound gas exhaust mufflers can be selected. When partial pressure vessel manufacturers can not meet the noise reduction requirement, a plurality of silencers are connected in series for use, multi-stage noise reduction is realized, and even more, noise is controlled by directly opening the size of an exhaust port valve.

However, the above-mentioned techniques have at least the following technical problems:

the existing method for controlling noise by opening the size of an exhaust port valve is mainly used for a miniature pressure container with low pressure and very small volume. For a typical pressure vessel, if this method is used, its venting of the vent gas would be a very lengthy process, severely impacting the production campaign. The more the functional units of the silencer or the more the throttling stages, the better the silencing effect, but the more the manufacturing process and the more the manufacturing cost are, and the silencer has a common defect that the silencing effect is not good. Therefore, under the condition that the exhaust pressure and the airflow speed are very high, a silencer which is good in silencing effect, simple in manufacturing process and low in manufacturing cost needs to be developed urgently.

Disclosure of Invention

To the above problem, the utility model provides a silencer with the silencer submergence in liquid noise elimination medium, can reduce exhaust noise very effectively, noise cancelling effect is good and simple structure, low in manufacturing cost.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a silencer, include:

the inner cavity of the outer pipe is communicated with an air outlet of an external pressure container, a plurality of first through holes are formed in the pipe wall of the outer pipe, and when the silencer is used, the silencer is immersed in the container filled with liquid silencing media.

The inner tube is sleeved with the outer tube, the inner cavity of the outer tube is communicated with the inner cavity of the inner tube, and the inner cavity of the inner tube is communicated with an air outlet of an external pressure container.

A first blocking plate and a second blocking plate are respectively fixed at two ends of the outer pipe, and a third blocking plate is fixed at one end of the inner pipe; first closure plate is the annular plate, first closure plate cover is established and is fixed the outside of inner tube, the other end of inner tube passes first closure plate stretches into the inner chamber of outer tube, the inner tube stretches into the length of the inner chamber of outer tube is less than the length of the inner chamber of outer tube, wear to be equipped with the screw thread mouthpiece on the third closure plate, the screw thread mouthpiece communicates with each other with the gas outlet of external pressure container.

The pipe wall of the inner pipe is provided with a plurality of second through holes which are arranged at equal intervals along the circumferential direction of the pipe wall of the inner pipe.

The plurality of first through holes are arranged on the pipe wall of the outer pipe in multiple rows, each row comprises a plurality of first through holes which are distributed along the axial direction of the pipe wall of the outer pipe at equal intervals, and the plurality of first through holes on two adjacent rows are alternately arranged.

Each first through hole is a strip-shaped long hole.

The pipe wall of the outer pipe is provided with a plurality of support legs which are fixed at the bottom of the container filled with the liquid silencing medium.

The liquid silencing medium is water.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses with the silencer submergence in liquid noise elimination medium, can reduce the size that only liquid boiling sound was made to the noise of spouting. The noise level is controlled by adjusting the liquid level of the liquid silencing medium in the container, the boiling sound is smaller when the liquid content is higher, and if the liquid content is enough, the noise can be completely reduced to the degree that the noise can not be heard by human ears, so that the silencing effect is excellent; compared with the composite muffler and the plurality of mufflers connected in series adopted in the prior art, the muffler has the advantages of simple structure, great simplification of the manufacturing process flow, cheap and easily-obtained materials, cost saving and suitability for exhausting and noise reduction in the pressure relief stage of a pressure test.

Drawings

Fig. 1 is a schematic view illustrating an effect of a muffler installed in a container containing a liquid muffling medium according to the present invention;

fig. 2 is a schematic structural diagram of a muffler of the present invention;

FIG. 3 is a schematic structural view of the connection between the inner tube and the third blocking plate;

fig. 4 is a schematic structural view of the connection between the middle and outer tubes and the first and second blocking plates;

fig. 5 is a side view of a single foot of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

A muffler of embodiment 1, as shown in fig. 1, has an outer pipe 1, an inner pipe 2, and a threaded nozzle 3. The outer tube 1 is sleeved on the outer side of the inner tube 2, the inner cavity of the outer tube 1 is communicated with the inner cavity of the inner tube 2, the inner cavity of the inner tube 2 is communicated with the threaded nozzle 3, and the threaded nozzle 3 is communicated with an air outlet of an external pressure container.

As shown in fig. 2, a first blocking plate 5 and a second blocking plate 6 are respectively welded and fixed at two ends of the outer tube 1, and a third blocking plate 7 is welded and fixed at one end of the inner tube 2. First closure plate 5 is the annular plate, and the cover is established and welded fastening in the outside of inner tube 2, and the other end of inner tube 2 passes first closure plate 5 and stretches into the inner chamber of outer tube 1, and the length that inner tube 2 stretched into the inner chamber of outer tube 1 is less than the length of the inner chamber of outer tube 1.

The third closure plate 7 is provided with a threaded nozzle 3 in a penetrating way, and the threaded nozzle 3 is connected with an air outlet of an external pressure container.

As shown in fig. 4, a plurality of first through holes 11 are formed in the tube wall of the outer tube 1, the first through holes 11 are bar-shaped long holes and are arranged in a plurality of rows on the tube wall of the outer tube 1, each row includes a plurality of first through holes 11 distributed at equal intervals along the axial direction of the tube wall of the outer tube 1, and the plurality of first through holes 11 in two adjacent rows are alternately arranged.

In this embodiment, as shown in fig. 1, the wall of the outer tube 1 is further provided with a plurality of support legs 4 as shown in fig. 5, and the plurality of support legs 4 are welded and fixed to the bottom of a water container 8.

When in use, the muffler is immersed in water.

A silencer according to embodiment 2 is different from embodiment 1 in that, as shown in fig. 3, a plurality of second through holes 21 are provided in the pipe wall of the inner pipe 2, and the plurality of second through holes 21 are arranged at equal intervals in the circumferential direction of the pipe wall of the inner pipe 2.

The working principle of the above embodiment is as follows: when the silencer works, the silencer is immersed in water, the threaded nozzle 3 is connected with an exhaust pipeline of the pressure container and screwed on, and the silencer is very convenient to use. Generally, the gas discharged from the threaded nozzle 3 has a very high pressure and flow rate, and is first expanded and decompressed through the inner tube 2. The threaded nozzle 3 and the inner pipe 2 are welded and fixed by adopting the structure of the third plugging plate 7, so that the pressure and the speed of air flow passing through the inner pipe 2 can be reduced, and the silencer is more stable in work. The inner chamber of outer tube 1 communicates with each other with the inner chamber of inner tube 2, has seted up the first through-hole 11 of a plurality of simultaneously on the pipe wall of outer tube 1, makes gas carry out dilatation decompression for the second time, and the gas pressure of shunting spun from first through-hole 11 this moment, velocity of flow all reduce to some extent, become more gentle. First through-hole 11 is the bar slot hole of even setting, more conveniently carries out field work for, simultaneously, make the airflow through outer tube 1 bigger, do benefit to the dilatation decompression. Likewise, the inner pipe 2 and the outer pipe 1 are welded and fixed by adopting the structure of the first blocking plate 5 and the second blocking plate 6, so that the pressure and the speed of the airflow passing through the outer pipe 1 can be reduced, and the silencer is more stable in operation. Finally, water acts as a sound-damping medium, filling the interior and the surroundings of the muffler, so that the jet noise is converted into a sound of boiling water. Also, the more the water in the vessel 8, the less the boiling sound, and if the water is sufficient, the noise can be reduced to a level that is not audible to the human ear. The feet 4 are fixed to the bottom of the container 8 by spot welding, which makes the muffler more stable during operation. Water is used as a silencing medium, materials are simple and easily obtained, even waste can be utilized, local materials are used, and the silencing device is very convenient; compared with the composite muffler and a plurality of mufflers connected in series adopted in the prior art, the muffler has a simple structure, greatly simplifies the manufacturing process flow and saves the cost.

The second through holes 21 formed in the wall of the inner pipe 2 in embodiment 2 mainly serve as air flow compensation, and the ventilation area of the air flow can be increased appropriately, so that the muffler is more stable during operation.

The above-mentioned embodiments are only described for the preferred embodiments of the present invention, but not for limiting the scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall within the protection scope of the present invention without departing from the design spirit of the present invention, and the scope of the present invention is subject to the claims.

Claims (7)

1. A muffler, comprising: the silencer comprises an outer pipe, wherein the inner cavity of the outer pipe is communicated with an air outlet of an external pressure container, a plurality of first through holes are formed in the pipe wall of the outer pipe, a plurality of support legs are arranged on the pipe wall of the outer pipe and fixed at the bottom of the container filled with liquid silencing medium, and when the silencer is used, the silencer is immersed in the container filled with the liquid silencing medium.

2. The muffler according to claim 1, further comprising an inner pipe, wherein the outer pipe is sleeved outside the inner pipe, an inner cavity of the outer pipe is communicated with an inner cavity of the inner pipe, and an inner cavity of the inner pipe is communicated with an air outlet of an external pressure container.

3. The muffler of claim 2, wherein a first blocking plate and a second blocking plate are fixed to two ends of the outer pipe respectively, and a third blocking plate is fixed to one end of the inner pipe; first closure plate is the annular plate, first closure plate cover is established and is fixed the outside of inner tube, the other end of inner tube passes first closure plate stretches into the inner chamber of outer tube, the inner tube stretches into the length of the inner chamber of outer tube is less than the length of the inner chamber of outer tube, wear to be equipped with the screw thread mouthpiece on the third closure plate, the screw thread mouthpiece communicates with each other with the gas outlet of external pressure container.

4. The muffler of claim 2 or 3, wherein a plurality of second through holes are formed in the pipe wall of the inner pipe, and the second through holes are arranged at equal intervals along the circumferential direction of the pipe wall of the inner pipe.

5. The muffler according to claim 1, wherein the plurality of first through holes are arranged in a plurality of rows on the pipe wall of the outer pipe, each row includes a plurality of first through holes equally spaced along the axial direction of the pipe wall of the outer pipe, and the plurality of first through holes in two adjacent rows are alternately arranged.

6. The muffler of claim 5, wherein each of said first through holes is an elongated hole.

7. A muffler according to claim 1, wherein said liquid muffling medium is water.

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