CN210489234U - A second grade muffler for oxygenerator - Google Patents

Abstract

The utility model discloses a second-stage silencer used for an oxygen generator, which comprises a PVC pipe; a felt is arranged in the PVC pipe; the middle part of the felt is provided with a cavity; because the annular felt 3 is provided with the cavity, when nitrogen periodically discharged by the absorber passes through the cavity, the flow resistance is very low, the desorption of the absorber is not influenced, and the influence on the oxygen concentration is small; the felt is annularly adhered to the inner wall of the PVC pipe through an adhesive; pipe plugs are arranged at two ends of the PVC pipe; a pipe plug at one end of the PVC pipe is connected with a diffusion silencer; the secondary silencer effectively reduces medium-high frequency noise generated by the exhaust of the oxygen generator; the flow resistance of the secondary silencer is very low, so that the desorption of the adsorber is not influenced, and the influence on the oxygen concentration is small; the noise elimination effect of the standard pneumatic diffusion silencer is improved by the secondary silencer; the secondary silencer has simple structure, convenient processing and low cost.

Description

A second grade muffler for oxygenerator

Technical Field

The utility model relates to an oxygenerator technical field, concretely relates to a second grade muffler for oxygenerator.

Background

The molecular sieve oxygen generator prepares oxygen by the principles of pressure swing adsorption and pressure reduction desorption, and the desorption and discharge of nitrogen can generate great noise; at present, common silencers for eliminating noise of an oxygen generator are diffusion silencers in standard systems of pneumatic manufacturers; the muffler adopts a PE sintered material or a copper sintered material, and is suitable for emptying and exhausting with extremely high flow rate; air enters the adsorber through the compression of the air compressor in the oxygen generator, the pressure accumulated in the adsorption tower is higher along with the end of pressure-boosting adsorption, high-pressure gas in the tower is directly discharged to the environment in the moment during desorption, and the periodic exhaust process generates larger noise and needs to perform noise elimination treatment on the propagation of the noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a second grade muffler for oxygenerator to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a two-stage silencer for an oxygen generator comprises a PVC pipe; a felt is arranged in the PVC pipe; the middle part of the felt is provided with a cavity; because the annular felt is provided with the cavity, when nitrogen periodically discharged by the absorber passes through the cavity, the flow resistance is very low, the desorption of the absorber is not influenced, and the influence on the oxygen concentration is small; the felt is annularly adhered to the inner wall of the PVC pipe through an adhesive; pipe plugs are arranged at two ends of the PVC pipe; the pipe plug at one end of the PVC pipe is connected with a diffusion silencer.

Further, the felt is provided with pores; part of the passing sound energy is converted into heat in the pores through friction and dissipated.

Furthermore, internal threads are arranged at two ends of the PVC pipe, and external threads matched with the internal threads are arranged on the pipe plug; the pipe plugs are connected to the two ends of the PVC pipe through adhesives and internal threads.

Further, the diffusion silencer is in a convex shape; the end of the diffusion silencer with small outer diameter is inserted into the pipe plug for connection.

The utility model has the advantages that: the secondary silencer effectively reduces medium-high frequency noise generated by the exhaust of the oxygen generator; the flow resistance of the secondary silencer is very low, so that the desorption of the adsorber is not influenced, and the influence on the oxygen concentration is small; the noise elimination effect of the standard pneumatic diffusion silencer is improved by the secondary silencer; the secondary silencer has simple structure, convenient processing and low cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Figure 2 is a cross-sectional view of a PVC pipe.

Fig. 3 is a plan view of the present invention.

The labels in the figure are: the pipe comprises a PVC pipe body, a pipe plug body, a diffusion silencer body, a felt body, a cavity and a hole, wherein the PVC pipe body comprises 1, 2, a pipe plug body, 3, the diffusion silencer body, 4, the felt body, 5 and 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail with reference to the following embodiments; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-3, the present embodiment provides a secondary muffler for an oxygen generator, comprising a PVC pipe 1; a felt 4 is arranged in the PVC pipe 1; the felt 4 is annularly adhered to the inner wall of the PVC pipe 1; the middle part of the felt 4 is provided with a cavity 5; because the annular felt 4 is provided with the cavity 5, when nitrogen periodically discharged by the absorber passes through the cavity 5, the flow resistance is very low, the desorption of the absorber cannot be influenced, and the influence on the oxygen concentration is small; pipe plugs 2 are arranged at two ends of the PVC pipe 1; the pipe plug 2 at one end of the PVC pipe 1 is connected with a diffusion silencer 3.

Preferably, the felt 4 is provided with pores 6; part of the passing sound energy is dissipated as heat by frictional conversion in the pores 6.

Preferably, internal threads are arranged at two ends of the PVC pipe 1, and external threads matched with the internal threads are arranged on the pipe plug 2; the pipe plugs 2 are connected to both ends of the PVC pipe 1 by an adhesive and an internal thread.

Preferably, the diffusion muffler 3 is in the shape of a letter; the small end of the diffusion silencer 3 is inserted into the pipe plug 2 and connected through a clamping groove.

When the utility model is used, nitrogen periodically discharged by the absorber firstly passes through the secondary silencer consisting of the pipe plug 2, the PVC pipe 1 and the felt 4, and part of sound energy is converted into heat energy through friction in the pores 6 of the felt through the felt 4 to be dissipated, so that the medium and high frequency sound waves are weakened to form resistance noise elimination; when a relatively sealed space is formed by the PVC pipe 1 and the pipe plug 2, sound insulation is formed, and the sound transmission capacity is reduced; the space formed by the PVC pipe 1 and the pipe plug 2 also belongs to an expansion chamber for silencing, so that acoustic impedance in the channel is mutated, and the sound source is reflected back to eliminate the noise; under the combined action of the secondary silencer and the diffusion silencer 3, the nitrogen periodically discharged by the adsorber generates silencing effect at high, medium and low frequency noises.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.

Claims (4)

1. A two-stage silencer for an oxygen generator comprises a PVC pipe (1); the method is characterized in that: a felt (4) is arranged in the PVC pipe (1); a cavity (5) is arranged in the middle of the felt (4); pipe plugs (2) are arranged at two ends of the PVC pipe (1); a pipe plug (2) at one end of the PVC pipe (1) is connected with a diffusion silencer (3).

2. The secondary muffler for an oxygen generator according to claim 1, wherein: and the felt (4) is provided with pores (6).

3. The secondary muffler for an oxygen generator according to claim 1, wherein: the PVC pipe is characterized in that internal threads are arranged at two ends of the PVC pipe (1), and external threads matched with the internal threads are arranged on the pipe plug (2).

4. The secondary muffler for an oxygen generator according to claim 1, wherein: the diffusion silencer (3) is in a convex shape; one end of the diffusion silencer (3) with small outer diameter is inserted into the pipe plug (2) for connection.

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