Mining pneumatic diaphragm pump silencer

Abstract

The mining pneumatic diaphragm pump silencer comprises a silencer shell, a silencing cavity is formed in the silencer shell, a first sound guide pipe is integrally arranged in the silencing cavity of the silencer shell, the upper end of the first sound guide pipe is communicated and connected with a built-in silencer, and the lower end of the first sound guide pipe is an air inlet end; a plurality of pressure relief holes are distributed in one side of the part, in the inner cavity of the silencer shell, of the first sound guide pipe in a circumferential array in a hollowed-out manner, and the pressure relief holes form a pressure relief hole group; according to the mining pneumatic diaphragm pump, before gas enters a main silencing structure, pressure relief can be conducted on gas exhausted by the mining pneumatic diaphragm pump, exhaust resistance generated by the silencing device to the pneumatic diaphragm pump is reduced, and therefore the pneumatic diaphragm pump is protected, the probability that the pneumatic diaphragm pump breaks down is reduced, and the production cost is reduced; the silencing device for the mining pneumatic diaphragm pump can effectively conduct silencing treatment on gas exhausted by the mining pneumatic diaphragm pump, and noise of the gas finally released from the silencing device does not cause harm to the body health of operators.

Description

Technical Field

[0001] The utility model belongs to the field of pneumatic diaphragm pump manufacturing, and more specifically, it is a noise reduction device for mine pneumatic diaphragm pumps. Background Art

[0002] During the working process of mine pneumatic diaphragm pumps, relatively large noises will be generated, which will cause harm to the physical health of operators. The conventional noise reduction device for mine pneumatic diaphragm pumps consists of a muffler pipe and a cover. Muffling holes are distributed on the side of the muffler pipe, and the top end of the muffler pipe is closed by the cover; during the working process of the pneumatic diaphragm pump, the gas discharged from the air outlet of the pneumatic diaphragm pump has a large air pressure. However, since the cover closes the top end of the intake pipe and the muffling holes are perpendicular to the gas flow direction, a discharge resistance will be formed on the pneumatic diaphragm pump, thereby increasing the power of starting the diaphragm pump, making it easy to damage the starting diaphragm pump, and thus increasing the production cost. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies existing in the prior art, the utility model provides a noise reduction device for mine pneumatic diaphragm pumps, which can relieve the pressure of the gas discharged from the mine pneumatic diaphragm pump before the gas enters the main noise reduction structure, reduce the discharge resistance generated by the noise reduction device on the pneumatic diaphragm pump, and thus protect the pneumatic diaphragm pump.

[0004] Technical Solution: To achieve the above object, a noise reduction device for mine pneumatic diaphragm pumps of the utility model includes a muffler housing. A muffling cavity is formed inside the muffler housing. A first sound guide pipe is integrally arranged in the muffling cavity of the muffler housing. The upper end of the first sound guide pipe is connected and communicated with an internal muffler, and the lower end of the first sound guide pipe is the intake end; on one side of the part of the first sound guide pipe in the inner cavity of the muffler housing, a number of pressure relief holes are distributed in a circumferential array, and the number of pressure relief holes constitutes a pressure relief hole group.

[0005] Further, a second sound guide pipe and a third sound guide pipe are respectively and parallelly arranged on both sides of the first sound guide pipe. A first sound insulation board, a second sound insulation board and a third sound insulation board are sequentially sleeved on the second sound guide pipe from top to bottom. The first sound guide pipe and the third sound guide pipe are fixedly and through-connected to the second sound insulation board and the third sound insulation board.

[0006] Further, a first muffling chamber is formed between the second sound insulation board and the third sound insulation board; a second muffling chamber is formed between the first sound insulation board and the second sound insulation board; a third muffling chamber is formed between the third sound insulation board and the lower end face of the lower muffler housing; an exhaust chamber is formed between the first sound insulation board and the upper end face of the muffler housing; the internal muffler is located in the second muffling chamber.

[0007] Further, a number of pressure relief holes form a pressure relief hole group and are located in the first sound absorption chamber; one side of the part of the second air duct located in the first sound absorption chamber is provided with a number of air inlet holes distributed in a circumferential array, and the number of air inlet holes forms an air inlet hole group.

[0008] Further, the built-in muffler includes an upper clamping plate, an annular sound absorption plate, a lower clamping plate and an inner sound absorption pipe. The upper clamping plate is sealed and fixed at the upper end of the inner sound absorption pipe; the lower clamping plate is fixedly sleeved on the outer wall of the inner sound absorption pipe. An upper annular clamping groove is arranged on the upper clamping plate, and a lower annular clamping groove is arranged on the lower clamping plate. The upper annular clamping groove and the lower annular clamping groove are arranged opposite to each other; the upper and lower ends of the annular sound absorption plate are clamped between the upper annular clamping groove and the lower annular clamping groove.

[0009] Further, a number of outer sound absorption holes are distributed in a circumferential array and are hollowed out on the annular sound absorption plate. The number of outer sound absorption holes forms an outer sound absorption hole group. On the pipe body of the part of the inner sound absorption pipe located between the upper clamping plate and the lower clamping plate, a number of inner sound absorption holes are distributed in a circumferential array and are hollowed out. The outer sound absorption holes and the inner sound absorption holes are staggered; the space formed by the upper clamping plate, the lower clamping plate, the annular sound absorption plate and the inner sound absorption pipe together is an annular sound absorption chamber.

[0010] Further, the air inlet end at the lower end of the first sound guide pipe is matched with the air outlet of the pneumatic diaphragm pump.

[0011] Further, an exhaust pipe is penetrated and arranged at the upper end of the muffler housing, and the exhaust pipe is communicated with the sound absorption cavity formed inside the muffler housing.

[0012] Beneficial effects: For a muffling device of a mine pneumatic diaphragm pump of the present invention, the pressure relief holes on the first sound guide pipe form a pressure relief hole group, which can relieve the pressure of the gas discharged by the mine pneumatic diaphragm pump before the gas discharged by the mine pneumatic diaphragm pump enters the main sound absorption structure, reduce the discharge resistance generated by the muffling device on the pneumatic diaphragm pump, thereby protecting the pneumatic diaphragm pump, reducing the probability of the pneumatic diaphragm pump failing, and reducing the production cost; the first sound absorption chamber and the pressure relief holes on the first sound guide pipe located in the first sound absorption chamber, the second sound absorption chamber, the built-in muffling device fixed to the upper end of the first sound guide pipe and located in the second sound absorption chamber, and the third sound absorption chamber work together to effectively muffler the gas discharged by the mine pneumatic diaphragm pump, so that the noise of the gas finally released from the muffling device will not harm the physical health of the operator. Description of the Drawings

[0013] Figure 1 is a schematic external structure diagram of a muffling device of a mine pneumatic diaphragm pump of the present invention;

[0014] Figure 2 is a schematic internal structure diagram of a muffling device of a mine pneumatic diaphragm pump of the present invention;

[0015] Figure 3Schematic diagram of the built-in silencer structure in the first embodiment;

[0016] Figure 4 Schematic diagram of the built-in silencer structure in the second embodiment. Specific implementation manners

[0017] The present utility model will be further described below with reference to the accompanying drawings.

[0018] As shown in the attached Figures 1 to 4 figure, a noise reduction device for a mine pneumatic diaphragm pump includes a silencer housing 2. A silencing cavity is formed inside the silencer housing 2. An exhaust pipe 101 is penetrated and provided at the upper end of the silencer housing 2, and the exhaust pipe 101 communicates with the silencing cavity formed inside the silencer housing 2. A first sound guiding pipe 201 is integrally provided in the silencing cavity of the silencer housing 2. The upper end of the first sound guiding pipe 201 is connected and communicated with a built-in silencer 3. The lower end of the first sound guiding pipe 201 is, the air inlet end of the first sound guiding pipe 201 penetrates through the lower end surface of the silencer housing 2 and extends downward. A section of the pipe body where the air inlet end of the first sound guiding pipe 201 extends downward is matched with the air outlet of the pneumatic diaphragm pump 1. Gas shock waves are discharged from the air outlet of the pneumatic diaphragm pump 1. These noisy gases enter the first sound guiding pipe 201 through the air inlet end at the lower end of the first sound guiding pipe 201. On one side of the part of the first sound guiding pipe 201 in the inner cavity of the silencer housing 2, a plurality of pressure relief holes 204 are distributed in a circumferential array. The plurality of pressure relief holes 204 form a pressure relief hole group. The pressure relief hole group can release the pressure of the gas entering the first sound guiding pipe 201, thereby reducing the exhaust resistance generated by the built-in silencer 3 on the pneumatic diaphragm pump 1, thereby reducing the power of the pneumatic diaphragm pump 1, and the pressure relief hole group can perform the first stage of noise reduction on the gas entering the first sound guiding pipe 201. The gas that has undergone the first stage of noise reduction treatment enters the built-in silencer 3 along the first air guiding pipe 201 for the second stage of noise reduction. The gas that has undergone the second stage of noise reduction by the built-in silencer 3 diffuses from the built-in silencer 3 into the silencing cavity of the silencer housing 2, and then the exhaust pipe 101 penetrated and provided at the upper end of the silencer housing 2 discharges the gas that has undergone the noise reduction treatment out of the inner cavity of the silencer housing;

[0019] In order to further enhance the noise reduction effect of the silencer, the silencing cavity formed inside the silencer housing 2 is divided into three silencing chambers and one exhaust chamber. The specific operation is as follows:

[0020] As Figure 2As shown in the figure, a second sound guide pipe 202 and a third sound guide pipe 203 are respectively arranged in parallel on both sides of the first sound guide pipe 201. A first sound insulation board 205, a second sound insulation board 206 and a third sound insulation board 207 are successively sleeved on the second sound guide pipe 202 from top to bottom. The first sound insulation board 205, the second sound insulation board 206 and the third sound insulation board 207 are all in close contact with the inner wall of the sound absorption cavity and are welded and fixed in the sound absorption cavity. The first sound guide pipe 201 and the third sound guide pipe 203 are both fixedly and penetratingly connected to the second sound insulation board 206 and the third sound insulation board 207.

[0021] A first sound absorption chamber 401 is formed between the second sound insulation board 206 and the third sound insulation board 207; a second sound absorption chamber 402 is formed between the first sound insulation board 205 and the second sound insulation board 206, and a third sound absorption chamber 403 is formed between the third sound insulation board 207 and the lower end face of the lower muffler housing 2; an exhaust chamber 404 is formed between the first sound insulation board 205 and the upper end face of the muffler housing 2; the built-in muffler 3 is located in the second sound absorption chamber 402; a plurality of pressure relief holes 204 form a pressure relief hole group and are located in the first sound absorption chamber 401; on one side of the part of the second air guide pipe 202 located in the first sound absorption chamber 401, a plurality of air inlet holes 208 are distributed in a circumferential array and are hollowed out, and the plurality of air inlet holes 208 form an air inlet hole group; the gas with noise and strong pressure discharged from the air outlet of the pneumatic diaphragm pump 1 is decompressed and subjected to the first sound absorption in the first sound absorption chamber 401, the second sound absorption in the second sound absorption chamber 402, the third sound absorption in the third sound absorption chamber 403, then converges in the exhaust chamber 404, and is discharged through the exhaust pipe 101.

[0022] The air outlet of the pneumatic diaphragm pump 1 discharges gas shock waves. These gases with noise and strong pressure enter the first sound guide pipe 201 through the air inlet at the lower end of the first sound guide pipe 201. When the gases with noise and strong pressure reach the first sound absorption chamber 401 along the first sound guide pipe 201, the pressure relief hole group formed by a number of pressure relief holes 204 on the first sound guide pipe 201 can release the pressure of the gases with noise and strong pressure, thereby reducing the exhaust resistance generated by the built-in muffler 3 on the pneumatic diaphragm pump 1 and performing the first sound absorption and noise reduction on the gases with noise and strong pressure. The air pressure released from the pressure relief hole group enters the second air guide pipe 202 through the air inlet hole group formed by a number of air inlet holes 208 on the second air guide pipe 202 and is discharged into the exhaust chamber 404 along the second air guide pipe 202, and then the air pressure is equalized with the atmospheric pressure through the exhaust pipe 101 provided through the upper end of the muffler housing 2; the gases that have undergone pressure relief and the first sound absorption and noise reduction continue to enter the built-in muffler 3 along the first sound guide pipe 201 and undergo the second sound absorption treatment in the built-in muffler. The gases that have completed the second sound absorption through the built-in muffler 3 are discharged from the built-in muffler 3 into the second sound absorption chamber 402; the gases discharged into the second sound absorption chamber 402 enter the third sound absorption chamber 403 along the third sound guide pipe 203, and then undergo the third sound absorption in the third sound absorption chamber 403. The gases that have undergone the third sound absorption enter the exhaust chamber 404 along the second air guide pipe, and finally the gases that have completed the sound absorption treatment are discharged from the sound absorption cavity of the muffler housing 2 through the exhaust pipe 101 provided through the upper end of the muffler housing 2.

[0023] In the first embodiment above, a common built-in muffler 3 is used. As Figure 3 shown, the common built-in muffler 3 is composed of an upper cover plate 301, an annular orifice plate 302, and a lower cover plate 303. A conduit is provided through the lower cover plate 303. The annular orifice plate 302 is fixedly connected between the upper cover plate 301 and the lower cover plate 303. The upper cover plate 301, the lower cover plate 303, and the annular orifice plate 302 together form a built-in sound absorption cavity. The gas enters the built-in sound absorption cavity through the conduit on the lower cover plate 303 and undergoes the second sound absorption through the annular sound absorption plate 302 and is discharged into the second sound absorption chamber 402. However, the gas entering the common built-in muffler 3 only undergoes one sound absorption through the annular orifice plate 302. Therefore, the sound absorption effect cannot reach the best effect. Therefore, an optimized design is carried out on the common built-in muffler 3 and the second embodiment is proposed.

[0024] As Figure 4As shown in the figure, in the second embodiment, the built-in silencer 3 includes an upper clamping plate 301, an annular sound-absorbing plate 302, a lower clamping plate 303, and an inner sound-absorbing tube 304. The upper clamping plate 301 is fixedly sealed to the upper end of the inner sound-absorbing tube 304; the lower clamping plate 303 is fixedly sleeved on the outer wall of the inner sound-absorbing tube 304. An upper annular clamping groove 308 is provided on the upper clamping plate 301, and a lower annular clamping groove 309 is provided on the lower clamping plate 303. The upper annular clamping groove 308 and the lower annular clamping groove 309 are arranged opposite to each other; the upper and lower ends of the annular sound-absorbing plate 302 are clamped between the upper annular clamping groove 308 and the lower annular clamping groove 309. The space formed by the upper clamping plate 301, the lower clamping plate 303, the annular sound-absorbing plate 302, and the inner sound-absorbing tube 304 is an annular sound-absorbing chamber 307.

[0025] When manufacturing the built-in silencer 3 in the second embodiment, first, the upper clamping plate 301 is fixedly welded to the upper end of the inner sound-absorbing tube 304. Then, the lower clamping plate 303 is sleeved on the built-in sound-absorbing tube 304 from the lower end of the inner sound-absorbing tube 304. Then, the position of the lower clamping plate 303 on the inner sound-absorbing tube 304 is adjusted so that the upper end of the annular sound-absorbing plate 302 can be clamped in the upper annular clamping groove 308 of the upper clamping plate 301. Then, the position of the lower clamping plate 303 on the inner sound-absorbing tube 304 is adjusted so that the lower end of the annular sound-absorbing plate 302 can be clamped in the upper annular clamping groove 309 of the lower clamping plate 303. Then, the lower clamping plate 303 is fixedly welded to the inner sound-absorbing tube 304. Finally, the upper and lower ends of the annular sound-absorbing plate 302 are spot-welded so that the upper end of the annular sound-absorbing plate 302 is relatively fixed to the upper clamping plate 301, and the lower end of the annular sound-absorbing plate 302 is relatively fixed to the lower clamping plate 303.

[0026] A number of outer sound-absorbing holes 305 are distributed in a circumferential array and are hollowed out on the annular sound-absorbing plate 302. The number of outer sound-absorbing holes 305 forms an outer sound-absorbing hole group. On the tube body of the inner sound-absorbing tube 304 located between the upper clamping plate 301 and the lower clamping plate 303, a number of inner sound-absorbing holes 306 are distributed in a circumferential array and are hollowed out. The outer sound-absorbing holes 305 and the inner sound-absorbing holes 306 form an inner and outer double-layer sound-absorbing structure, which can effectively perform sound-absorbing treatment on the gas entering the built-in silencer 3; the aperture of the outer sound-absorbing holes 305 is larger than the aperture of the inner sound-absorbing holes 306. In this way, the outer sound-absorbing holes 305 and the inner sound-absorbing holes 306 can be staggered. Therefore, the gas that has undergone sound-absorbing treatment through the inner sound-absorbing holes 306 can impact the inner wall of the annular sound-absorbing plate 302 and form a rebound in the annular sound-absorbing chamber 307. The rebounded gas will be homogenized with the gas discharged from the inner sound-absorbing holes 306 subsequently to complete further sound absorption. Finally, it will pass through the outer sound-absorbing holes 305 on the annular sound-absorbing plate 302 for another sound absorption, thereby completing the process of the second sound absorption.

[0027] The above is the preferred embodiment described in the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A noise reduction device for a mine pneumatic diaphragm pump, characterized in that: It includes a muffler housing (2) with a sound-absorbing cavity formed inside. A first sound guide tube (201) is integrally provided in the sound-absorbing cavity of the muffler housing (2). The upper end of the first sound guide tube (201) is connected and communicated with a built-in muffler (3), and the lower end of the first sound guide tube (201) is the air inlet end. On one side of the part of the first sound guide tube (201) in the inner cavity of the muffler housing (2), a number of pressure relief holes (204) are distributed in a circumferential array, and the number of pressure relief holes (204) constitutes a pressure relief hole group.

2. The noise elimination device for a mine pneumatic diaphragm pump according to claim 1, wherein: A second sound guide tube (202) and a third sound guide tube (203) are respectively arranged in parallel on both sides of the first sound guide tube (201). A first sound insulation board (205), a second sound insulation board (206) and a third sound insulation board (207) are sequentially sleeved on the second sound guide tube (202) from top to bottom. The first sound guide tube (201) and the third sound guide tube (203) are fixedly and penetratingly connected to the second sound insulation board (206) and the third sound insulation board (207).

3. The noise reduction device for a mine pneumatic diaphragm pump according to claim 2, characterized in that: A first sound-absorbing chamber (401) is formed between the second sound insulation board (206) and the third sound insulation board (207); a second sound-absorbing chamber (402) is formed between the first sound insulation board (205) and the second sound insulation board (206), and a third sound-absorbing chamber (403) is formed between the third sound insulation board (207) and the lower end face of the lower muffler housing (2); an exhaust chamber (404) is formed between the first sound insulation board (205) and the upper end face of the muffler housing (2); the built-in muffler (3) is located in the second sound-absorbing chamber (402).

4. The noise reduction device for a mine pneumatic diaphragm pump according to claim 2, characterized in that: The number of pressure relief holes (204) that constitute the pressure relief hole group is located in the first sound-absorbing chamber (401); on one side of the part of the second sound guide tube (202) in the first sound-absorbing chamber (401), a number of air inlet holes (208) are distributed in a circumferential array, and the number of air inlet holes (208) constitutes an air inlet hole group.

5. The noise reduction device for a mine pneumatic diaphragm pump according to claim 1, characterized in that: The built-in muffler (3) includes an upper clamping plate (301), an annular sound-absorbing plate (302), a lower clamping plate (303) and an inner sound guide tube (304). The upper clamping plate (301) is sealed and fixed to the upper end of the inner sound guide tube (304); the lower clamping plate (303) is fixedly sleeved on the outer wall of the inner sound guide tube (304). An upper annular clamping groove (308) is provided on the upper clamping plate (301), and a lower annular clamping groove (309) is provided on the lower clamping plate (303). The upper annular clamping groove (308) and the lower annular clamping groove (309) are arranged oppositely; the upper and lower ends of the annular sound-absorbing plate (302) are clamped between the upper annular clamping groove (308) and the lower annular clamping groove (309).

6. The noise elimination device for a mine pneumatic diaphragm pump according to claim 5, wherein: A plurality of outer sound absorption holes (305) are arranged in a circumferential array and are hollowed out on the annular sound absorption plate (302). The plurality of outer sound absorption holes (305) form an outer sound absorption hole group. On the pipe body of the inner sound absorption pipe (304) located between the upper clamping plate (301) and the lower clamping plate (303), a plurality of inner sound absorption holes (306) are arranged in a circumferential array and are hollowed out. The outer sound absorption holes (305) and the inner sound absorption holes (306) are arranged in a staggered manner; the space formed by the upper clamping plate (301), the lower clamping plate (303), the annular sound absorption plate (302) and the inner sound absorption pipe (304) together is an annular sound absorption chamber (307).

7. The noise reduction device for a mine pneumatic diaphragm pump according to claim 1, characterized in that: The air inlet end at the lower end of the first sound guiding pipe (201) is matched with the air outlet of the pneumatic diaphragm pump (1).

8. A noise reduction device for a mine pneumatic diaphragm pump according to claim 1, characterized in that: An exhaust cylinder (101) is arranged through the upper end of the muffler housing (2), and the exhaust cylinder (101) is communicated with the sound absorption cavity formed inside the muffler housing (2).

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