Diaphragm pump noise reduction silencer

Abstract

The utility model relates to a diaphragm pump noise reduction silencer which comprises a first-stage silencing pot, an air inlet assembly and an air exhaust assembly, and a first silencing layer is arranged on the inner wall of the first-stage silencing pot; the air inlet assembly comprises a drying cylinder and an air inlet pipe, one end of the drying cylinder is inserted into the first-stage silencing cylinder, a plurality of second air inlet holes are formed in the cylinder wall, located in the first-stage silencing cylinder, of the drying cylinder, and one end of the air inlet pipe is inserted into the drying cylinder from the other end of the drying cylinder; a plurality of first air inlet holes are formed in the pipe wall, located in the drying cylinder, of the air inlet pipe, the other end of the air inlet pipe is connected with an exhaust port of the diaphragm pump, and a water absorption layer is arranged in a cavity between the air inlet pipe and the drying cylinder. According to the diaphragm pump, moisture in airflow exhausted by the diaphragm pump is absorbed through the water absorption layer of the air inlet assembly so as to dry the airflow, the first silencing layer is matched with the partition plates to conduct primary silencing and noise reduction, secondary silencing and noise reduction are conducted through the second silencing layer, then the airflow is exhausted, the silencing and noise reduction effect is improved, and the service life of a silencer is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of muffler, concretely refers to a diaphragm pump noise reduction muffler. BACKGROUND

[0002] The pneumatic diaphragm pump is a new type of conveying machinery, adopts compressed air as power source, can pump all kinds of corrosive liquid, liquid with particles, high viscosity, volatile, flammable and toxic liquid. The exhaust port of the pneumatic diaphragm pump will produce great vibration and noise during work due to large exhaust pressure, so it is necessary to install a muffler at the exhaust port to reduce noise.

[0003] The air discharged by the existing diaphragm pump usually contains certain moisture, which can easily erode and damage the sound-absorbing layer inside the muffler after entering the muffler, thereby reducing the noise reduction and muffling effect and shortening the service life of the muffler. UTILITY MODEL CONTENTS

[0004] The utility model provides a diaphragm pump noise reduction muffler to overcome the defects of the prior art, which can dry air while muffling, thereby improving the noise reduction effect and the service life of the muffler.

[0005] The utility model is implemented by the following technical scheme, a diaphragm pump noise reduction muffler, comprising a primary muffler cylinder, an air inlet assembly and an exhaust assembly, a first sound-absorbing layer is arranged on the inner wall of the primary muffler cylinder; the air inlet assembly comprises a drying cylinder and an air inlet pipe, one end of the drying cylinder is inserted into the primary muffler cylinder, a plurality of second air inlet holes are arranged in the cylinder wall of the drying cylinder, one end of the air inlet pipe is inserted into the drying cylinder from the other end of the drying cylinder, a plurality of first air inlet holes are arranged in the pipe wall of the air inlet pipe, the other end of the air inlet pipe is connected with the exhaust port of the diaphragm pump, and a water-absorbing layer is arranged in the cavity between the air inlet pipe and the drying cylinder.

[0006] The air flow discharged by the diaphragm pump enters the inside of the drying cylinder through the first air inlet holes of the air inlet pipe, the water in the air flow is absorbed by the water-absorbing layer in the drying cylinder to dry the air flow, the dried air flow flows into the inside of the primary muffler cylinder through the second air inlet holes, the air flow is absorbed and reduced in noise by the first sound-absorbing layer, and finally is discharged through the exhaust assembly, so that the air flow is dried while being muffled and reduced in noise, thereby improving the service life of the muffler.

[0007] As an optimization, a plurality of partitions are fixedly arranged in the primary muffler cylinder, the plurality of partitions are arranged between the air inlet assembly and the exhaust assembly and are arranged along the axial direction of the primary muffler cylinder, and a plurality of muffling holes are arranged in the plurality of partitions. In this optimization scheme, the air flow flows backward through the muffling holes in the partitions, is blocked layer by layer by the plurality of partitions, and the sound energy is attenuated layer by layer, so that the first sound-absorbing layer can better absorb and reduce noise and the muffling effect is enhanced.

[0008] As an optimization, the several sound holes are arranged in a concentric ring shape on the partition plate, and the sound holes of adjacent partition plates are arranged in an axial staggered manner. The optimization scheme further improves the sound reduction effect by arranging the sound holes in a staggered manner to more effectively reduce the flow rate of the airflow, making the airflow flow in a wave shape along the axial direction.

[0009] As an optimization, a first flange is fixed to the outer wall of the air inlet pipe, a second flange is fixed to one end of the drying cylinder outside the first-stage sound reduction cylinder, and the first flange and the second flange are fixed by bolts. The optimization scheme facilitates disassembly and replacement of the water absorption layer by connecting the air inlet pipe and the drying cylinder through the flanges.

[0010] As an optimization, the water absorption layer is a desiccant. The optimization scheme has strong water absorption and good air permeability, facilitating airflow passage.

[0011] As an optimization, the first sound reduction layer is sound-absorbing cotton. The optimization scheme has stronger sound absorption.

[0012] As an optimization, the exhaust assembly comprises a second-stage sound reduction cylinder and an exhaust pipe, one end of the second-stage sound reduction cylinder is inserted into the first-stage sound reduction cylinder, a plurality of second exhaust holes are formed in the cylinder wall of the second-stage sound reduction cylinder inside the first-stage sound reduction cylinder, one end of the exhaust pipe is inserted into the second-stage sound reduction cylinder from the other end of the second-stage sound reduction cylinder, a plurality of first exhaust holes are formed in the pipe wall of the exhaust pipe inside the second-stage sound reduction cylinder, and a second sound reduction layer is arranged in the cavity between the exhaust pipe and the second-stage sound reduction cylinder. The optimization scheme further improves the sound reduction effect by allowing the airflow to enter the second-stage sound reduction cylinder through the second exhaust holes, to pass through the second sound reduction layer to reduce noise, and to enter the exhaust pipe through the first exhaust holes to be discharged.

[0013] As an optimization, a third flange is fixed to the outer wall of the exhaust pipe, a fourth flange is fixed to one end of the second-stage sound reduction cylinder outside the first-stage sound reduction cylinder, and the third flange and the fourth flange are fixed by bolts. The optimization scheme facilitates disassembly and replacement of the second sound reduction layer by connecting the exhaust pipe and the second-stage sound reduction cylinder through the flanges.

[0014] As an optimization, the second sound reduction layer is a glass fiber mesh. The optimization scheme has good sound absorption and noise reduction performance, and better air permeability.

[0015] The diaphragm pump discharges airflow, which is dried by the water absorption layer of the air inlet assembly to improve the service life of the silencer.

[0016] The airflow passes through the first sound reduction layer and the plurality of partition plates in the first-stage sound reduction cylinder for primary sound reduction and noise reduction, and is discharged after secondary sound reduction and noise reduction by the second sound reduction layer of the exhaust assembly, thereby greatly improving the sound reduction and noise reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the internal structure schematic view of the first stage muffler cylinder of the utility model;

[0018] Fig. 2 It is the front view of the utility model;

[0019] Fig. 3 It is the internal structure schematic view of the drying cylinder;

[0020] Fig. 4 It is the internal structure schematic view of the second stage muffler cylinder;

[0021] Fig. 5 It is the intake pipe structure schematic view;

[0022] Fig. 6 It is the exhaust pipe structure schematic view;

[0023] Fig. 7 It is the distribution schematic view of the sound hole on the partition plate;

[0024] As shown in the figure:

[0025] 1, the first stage muffler cylinder, 2, the intake assembly, 21, the drying cylinder, 211, the second intake hole, 22, the intake pipe, 221, the first intake hole, 23, the water absorption layer, 24, the first flange, 25, the second flange, 3, the exhaust assembly, 31, the second stage muffler cylinder, 311, the second exhaust hole, 32, the exhaust pipe, 321, the first exhaust hole, 33, the second sound-absorbing layer, 34, the third flange, 35, the fourth flange, 4, the first sound-absorbing layer, 5, the partition plate, 51, the sound hole, 6, the sealing gasket, 7, the fifth flange. DETAILED DESCRIPTION

[0026] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through specific embodiments.

[0027] As Figs. 1-7 shown, a diaphragm pump noise reduction muffler, comprising a first stage muffler cylinder 1, intake assembly 2 and exhaust assembly 3, the inner wall of the first stage muffler cylinder 1 is provided with the first sound-absorbing layer 4, the first sound-absorbing layer 4 is fixedly connected to the circumferential inner wall of the first stage muffler cylinder 1, specifically, the first sound-absorbing layer 4 is sound-absorbing cotton.

[0028] A plurality of partition plates 5 are fixedly arranged in the first stage muffler cylinder 1, the plurality of partition plates 5 are located between the intake assembly 2 and the exhaust assembly 3 and arranged along the axial direction of the first stage muffler cylinder 1, a plurality of sound holes 51 are formed in each of the plurality of partition plates 5, the plurality of sound holes 51 are distributed in a concentric circular ring shape on the partition plate 5, and the sound holes 51 of adjacent partition plates 5 are arranged in an axial staggered manner. The middle part of the first stage muffler cylinder 1 of the embodiment is fixedly provided with three partition plates 5.

[0029] The air inlet assembly 2 comprises a drying cylinder 21 and an air inlet pipe 22. One end of the drying cylinder 21 is inserted into the primary muffling cylinder 1, and a plurality of second air inlet holes 211 are formed in the wall of the drying cylinder 21 located in the primary muffling cylinder 1, which are uniformly distributed on the circumferential wall of the drying cylinder 21. In this embodiment, the drying cylinder 21 and the primary muffling cylinder 1 are coaxially arranged, the drying cylinder 21 is inserted into the primary muffling cylinder 1 from the left end of the primary muffling cylinder 1, and the length of the drying cylinder 21 located in the primary muffling cylinder 1 is less than half the length of the primary muffling cylinder 1. The left and right ends of the primary muffling cylinder 1 are closed, and the left end wall of the drying cylinder 21 and the primary muffling cylinder 1 is welded and fixed.

[0030] One end of the air inlet pipe 22 is inserted into the drying cylinder 21 from the other end of the drying cylinder 21, and a plurality of first air inlet holes 221 are formed in the wall of the air inlet pipe 22 located in the drying cylinder 21, which are uniformly distributed on the circumferential wall of the air inlet pipe 22. In this embodiment, the air inlet pipe 22 and the drying cylinder 21 are coaxially arranged, the left end of the drying cylinder 21 located in the primary muffling cylinder 1 is closed, and the length of the air inlet pipe 22 is greater than the length of the drying cylinder 21.

[0031] A first flange 24 is welded and fixed to the outer wall of the air inlet pipe 22, and a second flange 25 is welded and fixed to the end of the drying cylinder 21 located outside the primary muffling cylinder 1, and the first flange 24 and the second flange 25 are fixed by bolts. In this embodiment, a sealing gasket 6 is installed between the first flange 24 and the second flange 25 to improve the sealing performance.

[0032] The other end of the air inlet pipe 22 is connected to the exhaust port of the diaphragm pump (not shown in the figure). In this embodiment, a fifth flange 7 is fixed to the end of the air inlet pipe 22 located outside the drying cylinder 21, which facilitates the connection with the exhaust port of the diaphragm pump.

[0033] A water absorption layer 23 is arranged in the cavity between the air inlet pipe 22 and the drying cylinder 21. Specifically, the water absorption layer 23 is a desiccant, which is filled in the annular cavity between the air inlet pipe and the drying cylinder to absorb the moisture in the air.

[0034] The air exhaust assembly 3 is used to exhaust the air in the primary muffling cylinder 1, and comprises a secondary muffling cylinder 31 and an air exhaust pipe 32. One end of the secondary muffling cylinder 31 is inserted into the primary muffling cylinder 1, and a plurality of second air exhaust holes 311 are formed in the wall of the secondary muffling cylinder 31 located in the primary muffling cylinder 1, which are uniformly distributed on the circumferential wall of the secondary muffling cylinder 31. In this embodiment, the secondary muffling cylinder 31 and the primary muffling cylinder 1 are coaxially arranged, the secondary muffling cylinder 31 is inserted into the primary muffling cylinder 1 from the right end of the primary muffling cylinder 1, and the length of the secondary muffling cylinder 31 located in the primary muffling cylinder 1 is less than half the length of the primary muffling cylinder 1. The right end wall of the secondary muffling cylinder 31 and the primary muffling cylinder 1 is welded and fixed.

[0035] The one end of the exhaust pipe 32 is inserted into the secondary muffler 31 from the other end of the secondary muffler 31, and a plurality of first exhaust holes 321 are formed on the wall of the exhaust pipe 32 in the secondary muffler 31, which are uniformly distributed on the circumferential wall of the exhaust pipe 32. The exhaust pipe 32 and the secondary muffler 31 are coaxially arranged in the embodiment, the one end of the secondary muffler 31 in the primary muffler 1 is closed, and the length of the exhaust pipe 32 is greater than the length of the secondary muffler 31.

[0036] The outer wall of the exhaust pipe 32 is fixedly connected with a third flange 34, the one end of the secondary muffler 31 outside the primary muffler 1 is fixedly connected with a fourth flange 35, and the third flange 34 and the fourth flange 35 are fixedly connected by bolts. The sealing gasket 6 is also arranged between the third flange 34 and the fourth flange 35 in the embodiment, so that the sealing performance is improved.

[0037] The second sound-absorbing layer 33 is arranged in the cavity between the exhaust pipe 32 and the secondary muffler 31. Specifically, the second sound-absorbing layer 33 is a glass fiber mesh with an annular structure, which is filled in the annular cavity between the exhaust pipe and the secondary muffler, so as to perform secondary sound-absorbing and noise reduction on the exhaust gas flow and improve the sound-absorbing effect.

[0038] In order to facilitate the connection of the exhaust pipe 32 with other equipment, the one end of the exhaust pipe 32 outside the secondary muffler 31 is also fixedly connected with a fifth flange 7.

[0039] Working principle: The gas flow discharged by the diaphragm pump enters the inside of the drying cylinder 21 through the first inlet hole 221 of the inlet pipe 22, and the moisture in the gas flow is absorbed by the water absorption layer 23 in the drying cylinder 21 to dry the gas flow. The dried gas flow flows into the inside of the primary muffler 1 through the second inlet hole 211, and is subjected to primary sound-absorbing and noise reduction in the primary muffler 1 by the first sound-absorbing layer 4 and the plurality of partitions 5. The primary sound-absorbed gas flow enters the inside of the secondary muffler 31 through the second exhaust hole 311, is subjected to secondary sound-absorbing and noise reduction by the second sound-absorbing layer 33, and then enters the exhaust pipe 32 through the first exhaust hole 321 for exhaust.

[0040] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or using the prior art, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the utility model and are not a limitation on the utility model. The preferred embodiments of the utility model have been described in detail, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A diaphragm pump noise reducer, characterized by: It comprises a primary muffler (1), an air inlet assembly (2) and an air outlet assembly (3), and a first sound-absorbing layer (4) is arranged on the inner wall of the primary muffler (1); The air inlet assembly (2) comprises a drying cylinder (21) and an air inlet pipe (22), one end of the drying cylinder (21) is inserted into the primary muffler (1), a plurality of second air inlet holes (211) are arranged on the cylinder wall of the drying cylinder (21) in the primary muffler (1), one end of the air inlet pipe (22) is inserted into the drying cylinder (21) from the other end of the drying cylinder (21), a plurality of first air inlet holes (221) are arranged on the pipe wall of the air inlet pipe (22) in the drying cylinder (21), the other end of the air inlet pipe (22) is connected with the air outlet of the diaphragm pump, and a water absorption layer (23) is arranged in the cavity between the air inlet pipe (22) and the drying cylinder (21).

2. A diaphragm pump noise reducer according to claim 1, characterized in that: A plurality of baffles (5) are arranged in the primary muffler (1), the plurality of baffles are arranged between the air inlet assembly (2) and the air outlet assembly (3) and along the axial direction of the primary muffler (1), and a plurality of sound-absorbing holes (51) are arranged on each of the plurality of baffles (5).

3. A diaphragm pump noise reducer as claimed in claim 2, characterized in that: The sound-absorbing holes (51) are arranged in a concentric circular ring shape on the baffle (5), and the sound-absorbing holes (51) of adjacent baffles (5) are arranged in an axial staggered manner.

4. A diaphragm pump noise reducer as defined in claim 1, wherein: A first flange (24) is fixedly connected to the outer wall of the air inlet pipe (22), a second flange (25) is fixedly connected to the end of the drying cylinder (21) outside the primary muffler (1), and the first flange and the second flange are fixedly connected by bolts.

5. A diaphragm pump noise reducer as defined in claim 1, wherein: The water absorption layer (23) is a drying agent.

6. A diaphragm pump noise reducer as defined in claim 1, wherein: The first sound-absorbing layer (4) is sound-absorbing cotton.

7. A diaphragm pump noise reducer according to claim 1 or 2, characterized in that: The air outlet assembly (3) comprises a secondary muffler (31) and an air outlet pipe (32), one end of the secondary muffler (31) is inserted into the primary muffler (1), a plurality of second air outlet holes (311) are arranged on the cylinder wall of the secondary muffler (31) in the primary muffler (1), one end of the air outlet pipe (32) is inserted into the secondary muffler (31) from the other end of the secondary muffler (31), a plurality of first air outlet holes (321) are arranged on the pipe wall of the air outlet pipe (32) in the secondary muffler (31), and a second sound-absorbing layer (33) is arranged in the cavity between the air outlet pipe (32) and the secondary muffler (31).

8. A diaphragm pump noise reducer according to claim 7, characterized in that: A third flange (34) is fixedly connected to the outer wall of the air outlet pipe (32), a fourth flange (35) is fixedly connected to the end of the secondary muffler (31) outside the primary muffler (1), and the third flange and the fourth flange are fixedly connected by bolts.

9. A diaphragm pump noise reducer as defined in claim 7, wherein: The second sound-absorbing layer (33) is a glass fiber mesh.

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