Compression-resistant silencer

Abstract

The utility model relates to the technical field of silencers, in particular to a compression-resistant silencer which comprises a silencing inner pipe and a silencing outer pipe, an air inlet pipe is arranged at one end of the silencing outer pipe, one end of the air inlet pipe is fixedly connected with one end of the silencing inner pipe and internally communicated with the silencing inner pipe, the silencing inner pipe is arranged in the silencing outer pipe, and the silencing outer pipe is arranged in the silencing inner pipe. A silencing plate is further movably installed in the silencing outer pipe, the two opposite ends of the silencing plate are fixedly connected with one ends of sliding blocks, the two sliding blocks are installed in a groove in a sliding mode, the groove is formed in the inner side of the silencing outer pipe, one inner side of the groove is fixedly connected with one end of a spring, and the other end of the spring is fixedly connected with the silencing outer pipe. And the other end of the spring is fixedly connected with one side of the sliding block. Through the arrangement of the springs, the impact force of airflow to the silencing plate can be relieved, the pressure resistance of the silencing plate can be improved, the service life of the silencing plate can be prolonged, the silencing plate can rebound the airflow into the space between the silencing inner pipe and the silencing outer pipe to generate sufficient collision, and therefore the silencing effect of the silencer is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to muffler technical field, concretely relates to a kind of pressure-resistant muffler. BACKGROUND

[0002] Muffler plays an important role in eliminating noise in daily life, and the noise problem of air conditioning equipment pipeline has become a major problem in product development. In order to solve the above problems, a muffler is usually installed in the device to reduce the noise of the air conditioning equipment pipeline.

[0003] In the application number: CN202322369648.3, a muffler is disclosed, wherein the sound-absorbing panel is provided with a protrusion located on the axis of the cylinder and protruding along the axial direction of the cylinder. Its advantage lies in that since the inlet and outlet are located on the axis of the cylinder, some sound waves can easily propagate directly from the inlet to the outlet. The sound-absorbing panel is located on the axis of the cylinder, which can block the propagation path of the sound waves, ensuring that the sound waves will collide with the cavity wall when passing through the sound-absorbing cavity, thereby ensuring the sound-absorbing effect of the muffler.

[0004] However, the airflow entering the muffler has a certain impact force. The sound-absorbing panel of the muffler is prone to bending after long-term use, which can not reflect the airflow well. The sound-absorbing effect of the muffler is not very good, as the sound-absorbing is only achieved by multiple reflections and collisions of sound waves in the sound-absorbing cavity. Therefore, a pressure-resistant muffler is proposed. UTILITY MODEL CONTENTS

[0005] In view of the problems in the prior art, the utility model provides a pressure-resistant muffler.

[0006] The utility model solves the technical problems by adopting the technical scheme of a pressure-resistant muffler, which includes a sound-absorbing inner tube and a sound-absorbing outer tube. One end of the sound-absorbing outer tube is provided with an air inlet pipe. One end of the air inlet pipe is fixedly connected to one end of the sound-absorbing inner tube and is internally connected. The sound-absorbing inner tube is arranged inside the sound-absorbing outer tube. The sound-absorbing outer tube is also movably installed with a sound-absorbing panel inside.

[0007] The opposite ends of the sound-absorbing panel are fixedly connected to one end of the sliding block. The sliding block is provided with two blocks. The two sliding blocks are slidingly installed inside the groove. The groove is opened on the inner side of the sound-absorbing outer tube. One side of the groove is fixedly connected to one end of the spring. The other end of the spring is fixedly connected to one side of the sliding block.

[0008] By adopting the above technical scheme, the impact force of the airflow on the sound-absorbing panel can be reduced by the setting of the spring, which can improve the pressure resistance and service life of the sound-absorbing panel. The airflow can also be bounced back between the sound-absorbing inner tube and the sound-absorbing outer tube to produce sufficient collision, thereby ensuring the sound-absorbing effect of the muffler.

[0009] Specifically, a third sound-absorbing cotton is fixedly connected to the side of the sound-absorbing plate near the inner tube of the sound-absorbing plate, and a second sound-absorbing hole is opened inside the sound-absorbing plate, and there are multiple second sound-absorbing holes.

[0010] By adopting the above technical solution, the third sound-absorbing cotton will absorb some of the noise emitted by the sound-absorbing inner tube.

[0011] Specifically, a first sound-absorbing cotton is fixedly sleeved on the outer side of the inner sound-absorbing tube, and a second sound-absorbing cotton is fixedly connected to the inner side of the outer sound-absorbing tube, with the first sound-absorbing cotton and the second sound-absorbing cotton being compatible.

[0012] By adopting the above technical solution, when the airflow further absorbs noise within the silencing tube and collidees with the outer silencing tube, the first and second silencing cotton can...

[0013] Specifically, a guide vane is fixedly connected to the inner side of the silencing inner tube, and multiple guide vanes are provided.

[0014] Specifically, the inner silencing tube and the first silencing cotton are both provided with first silencing holes. There are multiple first silencing holes, and these multiple first silencing holes are adapted to multiple guide plates.

[0015] By adopting the above technical solution, a portion of the airflow discharged from the inner silencing tube will collide with the guide vane of the inner silencing tube and be guided into the first silencing hole by the guide vane. The airflow ejected from the first silencing hole will collide with the surface of the second silencing cotton and bounce between the first silencing cotton and the second silencing cotton.

[0016] Specifically, the end of the muffler outer tube away from the air inlet pipe is provided with an air outlet pipe.

[0017] By adopting the above technical solution, the silenced airflow will pass through the second silencer hole of the silencer plate and be discharged from the exhaust pipe.

[0018] The beneficial effects of this utility model are:

[0019] (1) The pressure-resistant muffler described in this utility model can reduce the impact force of the airflow on the muffler plate by setting the spring, which can improve the pressure resistance and service life of the muffler plate. In addition, the muffler plate can also bounce the airflow into the muffler inner tube and the muffler outer tube to generate sufficient collision, thereby ensuring the muffler's noise reduction effect.

[0020] (2) The pressure-resistant silencer described in this utility model can further absorb the noise rebounding between the inner and outer silencer tubes by setting the first and second sound-absorbing cotton, thereby improving the sound absorption effect of the silencer. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Fig. 1 This is a schematic diagram of the planar structure of the present invention;

[0023] Fig. 2 This is a three-dimensional structural diagram of the present invention;

[0024] Fig. 3 This is a schematic diagram of the sound-absorbing inner tube structure of this utility model;

[0025] In the diagram: 1. Intake pipe; 2. Inner silencer pipe; 3. Guide vane; 4. First silencer cotton; 5. Second silencer cotton; 6. First silencer hole; 7. Third silencer cotton; 8. Slider; 9. Spring; 10. Groove; 11. Exit pipe; 12. Outer silencer pipe; 13. Silencer plate; 14. Second silencer hole. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] As one embodiment of this utility model, such as Figs. 1-3 As shown, the pressure-resistant silencer of this utility model includes an inner silencer tube 2 and an outer silencer tube 12. One end of the outer silencer tube 12 is provided with an air inlet pipe 1. One end of the air inlet pipe 1 is fixedly connected to one end of the inner silencer tube 2 and communicates internally. The inner silencer tube 2 is located inside the outer silencer tube 12. A silencer plate 13 is also movably installed inside the outer silencer tube 12.

[0028] The two opposite ends of the silencing plate 13 are fixedly connected to one end of the slider 8. There are two sliders 8, which are slidably installed inside the groove 10. The groove 10 is opened inside the silencing outer tube 12. One side of the groove 10 is fixedly connected to one end of the spring 9, and the other end of the spring 9 is fixedly connected to one side of the slider 8.

[0029] In use, sliding blocks 8 are provided at both ends of the muffler plate 13, and spring 9 provides a pushing force to the sliding blocks 8. When the airflow is discharged from the inside of the muffler inner tube 2 toward the muffler plate 13, the spring 9 is compressed, which can reduce the impact force of the airflow on the muffler plate 13. The muffler plate 13 then rebounds the airflow to the space between the muffler inner tube 2 and the muffler outer tube 12. The airflow will have sufficient collision between the muffler inner tube 2 and the muffler outer tube 12, thus ensuring the muffler's noise reduction effect.

[0030] It should be noted that the sliding of slider 8 in groove 10 has a limiting structure, and slider 8 can only slide in groove 10.

[0031] The present invention also includes a third sound-absorbing cotton 7 fixedly connected to the side of the sound-absorbing plate 13 near the sound-absorbing inner tube 2, and a second sound-absorbing hole 14 is provided inside the sound-absorbing plate 13, and the second sound-absorbing hole 14 is provided in multiple places.

[0032] When in use, the third sound-absorbing cotton 7 will absorb some of the noise discharged from the sound-absorbing inner tube 2.

[0033] The present invention also includes a first sound-absorbing cotton 4 fixedly sleeved on the outer side of the inner sound-absorbing tube 2, and a second sound-absorbing cotton 5 fixedly connected to the inner side of the outer sound-absorbing tube 12, wherein the first sound-absorbing cotton 4 and the second sound-absorbing cotton 5 are adapted to each other.

[0034] During use, when the airflow further absorbs noise within the silencing tube 2 and the silencing outer tube 12, the first silencing cotton 4 and the second silencing cotton 5 can...

[0035] This utility model also includes a flow guide plate 3 fixedly connected to the inner side of the silencing inner tube 2, and the flow guide plate 3 is provided with multiple plates.

[0036] This utility model also includes that the inner silencing tube 2 and the first silencing cotton 4 are both provided with first silencing holes 6, and there are multiple first silencing holes 6, which are adapted to multiple guide plates 3.

[0037] When in use, a portion of the airflow entering from the inner silencing tube 2 will impact the guide vane 3 of the inner silencing tube 2, and will be guided into the first silencing hole 6 by the guide vane 3. The airflow ejected from the first silencing hole 6 will impact the surface of the second silencing cotton 5 and bounce between the first silencing cotton 4 and the second silencing cotton 5.

[0038] It should be noted that the guide vane 3 is relatively thick and short, and has reinforcing ribs to prevent it from being easily bent.

[0039] This utility model also includes an exhaust pipe 11 at the end of the silencer outer pipe 12 away from the air inlet pipe 1.

[0040] When in use, the silenced airflow passes through the second silencer hole 14 of the silencer plate 13 and is discharged from the exhaust pipe 11.

[0041] In use, the airflow is discharged from the intake pipe 1 into the inner muffler pipe 2. Part of the airflow is discharged directly from the end of the inner muffler pipe 2 away from the intake pipe 1 into the interior of the outer muffler pipe 12 and impacts the muffler plate 13. After being impacted by the airflow, the third sound-absorbing cotton 7 first absorbs part of the noise and compresses the spring 9, so that the spring 9 reduces the impact force of the airflow on the muffler plate 13. The muffler plate 13 then reflects the airflow into the space between the first sound-absorbing cotton 4 and the second sound-absorbing cotton 5 to achieve the first layer of sound absorption. The other part of the airflow impacts the guide plate 3 of the inner muffler pipe 2 and is guided into the first sound absorption hole 6. The airflow ejected from the first sound absorption hole 6 will hit the surface of the second sound absorption cotton 5 and bounce between the first sound absorption cotton 4 and the second sound absorption cotton 5 to achieve the second layer of sound absorption. Finally, the airflow will pass through the second sound absorption hole 14 of the muffler plate 13 and be discharged from the exhaust pipe 11.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant silencer, comprising an inner silencer tube (2) and an outer silencer tube (12), characterized in that, One end of the silencing outer tube (12) is provided with an air inlet pipe (1), one end of the air inlet pipe (1) is fixedly connected to one end of the silencing inner tube (2) and communicates internally, the silencing inner tube (2) is located inside the silencing outer tube (12), and a silencing plate (13) is also movably installed inside the silencing outer tube (12); The two opposite ends of the silencing plate (13) are fixedly connected to one end of the slider (8). There are two sliders (8), which are slidably installed inside the groove (10). The groove (10) is opened inside the silencing outer tube (12). One side of the groove (10) is fixedly connected to one end of the spring (9), and the other end of the spring (9) is fixedly connected to one side of the slider (8).

2. The pressure-resistant silencer according to claim 1, characterized in that, The silencing plate (13) is fixedly connected to a third silencing cotton (7) on the side near the silencing inner tube (2). The silencing plate (13) has a second silencing hole (14) inside, and there are multiple second silencing holes (14).

3. The pressure-resistant silencer according to claim 1, characterized in that, The outer side of the silencing inner tube (2) is fixedly fitted with a first silencing cotton (4), and the inner side of the silencing outer tube (12) is fixedly connected with a second silencing cotton (5). The first silencing cotton (4) and the second silencing cotton (5) are compatible.

4. The pressure-resistant silencer according to claim 1, characterized in that, The inner side of the silencing inner tube (2) is fixedly connected with a flow guide plate (3), and the flow guide plate (3) is provided with multiple plates.

5. A pressure-resistant silencer according to claim 4, characterized in that, The inner silencing tube (2) and the first silencing cotton (4) are both provided with first silencing holes (6). There are multiple first silencing holes (6), and the multiple first silencing holes (6) are adapted to multiple guide plates (3).

6. The pressure-resistant silencer according to claim 1, characterized in that, The silencing outer tube (12) has an exhaust pipe (11) at the end away from the air inlet pipe (1).

Images