Silencing device for negative pressure vacuum generator

Abstract

The silencer comprises a negative pressure vacuum generator body and a silencer, the silencer comprises a dust collection part and a silencing part, the dust collection part comprises an installation cylinder, a dust collection structure is arranged in the installation cylinder, the silencing part comprises a silencing cylinder, and silencing cotton is arranged in the silencing cylinder. One end of the mounting cylinder is connected with an exhaust port of the negative pressure vacuum generator body, and the other end of the mounting cylinder is connected with the silencing cylinder in the axis direction. The stone dust collector has the advantages that the dust collection portion can collect dust and filter mixed gas with stone dust sucked by the vacuum port, the noise reduction portion can reduce noise, and due to the fact that the installation barrel and the noise reduction barrel are communicated in the axial direction, activated carbon and noise reduction cotton are convenient to replace, and the stone dust collector is low in use cost and more convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of stone processing technology especially to a silencer for negative pressure vacuum generator. BACKGROUND

[0002] The negative pressure vacuum generator is composed of a gas supply port, an exhaust port and a vacuum port, and is widely used in the fields of machinery, electronics, packaging, printing, plastics and robots in industrial automation. The traditional use of the vacuum generator is to cooperate with a suction cup to adsorb and transport various materials, especially non-ferrous and non-metallic materials or spherical objects that are fragile, soft and thin. The working principle is to use a high-speed jet of compressed air to form a jet at the outlet of the nozzle, generate a swirling flow, and under the action of the swirling flow, the air around the nozzle outlet is continuously sucked away, the pressure in the adsorption cavity is reduced below atmospheric pressure, and a certain vacuum degree is formed. Since the negative pressure vacuum generator produces a lot of noise during air exchange, a silencer needs to be installed to reduce noise.

[0003] Patent No. 201910491623.6 discloses a vacuum generator with a silencing function, which comprises a vacuum generator body, an air inlet, a nozzle, a diffusion chamber, an expansion chamber, a vacuum port and an exhaust port. The air inlet is arranged on one side of the vacuum generator body, the exhaust port is arranged on the other side of the vacuum generator body, the nozzle, the diffusion chamber and the expansion chamber are arranged in sequence between the air inlet and the air inlet, the vacuum port is arranged below the vacuum generator body, and the vacuum port is in communication with the nozzle; the silencer comprises a silencing filter cylinder and a silencing cylinder, the silencing filter cylinder is located in the inner wall of the silencing cylinder, and the silencer is sleeved on the exhaust port of the vacuum generator body. The vacuum generator with a silencing function can effectively reduce the noise level of the vacuum generator body.

[0004] The skilled person finds that a large amount of stone powder and stone powder suspension is generated during stone processing. The commonly used PLS plastic silencer and BLS / BLSM sintered silencer have poor noise reduction effect and are easy to block. UTILITY MODEL CONTENTS

[0005] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a silencer for negative pressure vacuum generator which can reduce noise and filter dust, and is suitable for stone processing field with low cost.

[0006] In order to achieve the above object, the utility model takes the technical scheme for: a kind of sound attenuation device for negative pressure vacuum generator, including negative pressure vacuum generator body, muffler, muffler includes dust suction part, sound attenuation part, dust suction part includes installation cylinder, dust suction structure is equipped in installation cylinder, sound attenuation part includes sound attenuation cylinder, sound attenuation cotton is equipped in sound attenuation cylinder, one end of installation cylinder is connected with the exhaust port of negative pressure vacuum generator body, other end is connected sound attenuation cylinder along the axial direction, the end of sound attenuation cylinder away from installation cylinder is equipped with gland.

[0007] Further, the installation cylinder includes a cylindrical barrel with external threads at one end, and the dust suction structure is activated carbon material arranged in the cylindrical barrel.

[0008] Preferably, the installation cylinder is coated with sound insulation material on the outside.

[0009] Further, the sound attenuation cylinder includes a cylindrical barrel with a diameter greater than that of the installation cylinder, one end of the cylindrical barrel is closed, and the other end is open, the installation cylinder communicates with the sound attenuation cylinder through the closed end, and the sound attenuation cotton is a cylindrical body with the same diameter and length as the inner diameter of the sound attenuation cylinder, which is arranged in the sound attenuation cylinder.

[0010] Further, the gland includes an inner cover arranged at the end of the sound attenuation cylinder, an outer cover mounted on the outside of the inner cover, and a locking structure connecting the inner cover and the outer cover, the inner cover is a circular cover plate, the circular cover plate is provided with an exhaust hole and a material hole, the material hole is a large through hole arranged at the center of the circular cover plate, and the exhaust hole is a plurality of small through holes arranged at equal distances around the material hole, the outer cover is a circular cover plate with the same shape as the inner cover, and the circular cover plate is provided with an exhaust hole corresponding to the exhaust hole of the inner cover.

[0011] Further, the locking structure includes internal threads arranged at the exhaust hole of the inner cover and a bolt passing through the exhaust hole of the outer cover and screwing with the internal threads.

[0012] Further, the outer wall of the sound attenuation cylinder is provided with an earring for mounting and fixing the negative pressure vacuum generator body.

[0013] Compared with the prior art, the utility model has the beneficial effects that the dust suction part can filter the mixed gas with stone dust suctioned by the vacuum port, the sound attenuation part can reduce and attenuate noise, and since the installation cylinder and the sound attenuation cylinder are axially communicated, it is convenient to replace activated carbon and sound attenuation cotton, and the use cost is low and more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the overall schematic view of the muffler in the utility model;

[0015] Fig. 2 It is the sectional view of the muffler in the utility model;

[0016] Fig. 3 It is the installation schematic view of the muffler and the gland in the utility model;

[0017] Fig. 4 It is the overall side view of the utility model;

[0018] Fig. 5 It is the sectional view of the utility model.

[0019] Legend: 1, negative pressure vacuum generator body; 2, muffler; 21, dust suction part; 2101, mounting cylinder; 2102, dust suction structure; 22, sound attenuation part; 2201, sound attenuation cylinder; 2202, sound attenuation cotton; 3, gland; 31, inner cover; 32, outer cover; 33, locking structure; 34, exhaust hole; 35, material hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0021] Embodiment 1

[0022] As Figs. 1 to 5 shown, a kind of sound attenuation device for negative pressure vacuum generator, including negative pressure vacuum generator body 1, muffler 2, muffler 2 includes dust suction part 21, sound attenuation part 22, dust suction part 21 includes mounting cylinder 2101, mounting cylinder 2101 is equipped with dust suction structure 2102 in, sound attenuation part 22 includes sound attenuation cylinder 2201, sound attenuation cylinder 2201 is equipped with sound attenuation cotton 2202 in, mounting cylinder 2101 one end is connected with the exhaust of negative pressure vacuum generator body 1, other end is connected along the axial direction sound attenuation cylinder 2201, sound attenuation cylinder 2201 is equipped with gland 3 in the end away from mounting cylinder 2101.

[0023] Dust suction structure 2102 of dust suction part 21 can filter the mixed gas with stone dust suctioned into vacuum port, sound attenuation cotton 2202 of sound attenuation part 22 can reduce noise, since mounting cylinder 2101 and sound attenuation cylinder 2201 are axially communicated, dust suction structure 2102 and sound attenuation cotton 2202 can be conveniently and quickly replaced, and it is more convenient and low in use cost.

[0024] Mounting cylinder 2102 includes a cylindrical barrel with external thread at one end, dust suction structure 2102 is activated carbon material arranged in the cylindrical barrel, activated carbon material can be activated carbon column or cylindrical bag loaded with activated carbon particles, or bulk activated carbon particles.

[0025] The muffling cylinder 2201 comprises a cylindrical cylinder with a diameter larger than that of the mounting cylinder 2101, the cylindrical cylinder is closed at one end close to the mounting cylinder 2101 and is open at the other end, the mounting cylinder 2101 is communicated with the muffling cylinder 2201 through the closed end, and the muffling cotton 2202 is a cylindrical body with the same diameter and length as the inner diameter of the muffling cylinder 2201, which is arranged in the muffling cylinder 2201.

[0026] Since the muffling cotton 2202 is made of flexible material, its diameter and length can also be slightly larger than the inner diameter and length of the muffling cylinder 2201, so as to ensure that the muffling cotton 2202 is more closely attached to the inner wall of the muffling cylinder 2201.

[0027] The cover 3 comprises an inner cover 31 arranged at the end of the muffling cylinder, an outer cover 32 arranged outside the inner cover 31, and a locking structure 33 connecting the inner cover 31 and the outer cover 32, the inner cover 31 is a circular cover piece, the circular cover piece is provided with an exhaust hole 34 and a material hole 35, the material hole 35 is a large through hole arranged at the center of the circular cover piece, and the exhaust hole 34 is a plurality of small through holes arranged at equal distances around the material hole 35, the outer cover 32 is a circular cover piece with the same shape as the inner cover 31, and the circular cover piece is provided with an exhaust hole 34 corresponding to the exhaust hole 34 of the inner cover 31.

[0028] The material hole 35 is used for facilitating disassembly and assembly of the muffling cotton 2202 and the dust absorption structure 2102.

[0029] The exhaust hole 34 is used for exhausting airflow and reducing noise.

[0030] The locking structure 33 comprises an inner thread arranged at the exhaust hole 34 of the inner cover 31 and a bolt penetrating through the exhaust hole 34 of the outer cover 32 and screwed with the inner thread.

[0031] As a preferred solution, the outer side of the mounting cylinder 2101 is coated with sound insulation material.

[0032] Finally, it should be pointed out that the above-described embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound muffling device for a negative pressure vacuum generator, comprising a negative pressure vacuum generator body, a sound muffler, characterized by: The muffler comprises a dust suction part and a muffling part, the dust suction part comprises a mounting cylinder, the mounting cylinder is provided with a dust suction structure, the muffling part comprises a muffling cylinder, the muffling cylinder is provided with muffling cotton, one end of the mounting cylinder is connected with an exhaust port of a negative pressure vacuum generator body, the other end of the mounting cylinder is connected with the muffling cylinder along an axial direction, and the muffling cylinder is provided with a gland away from the mounting cylinder.

2. The sound attenuation device for a negative pressure vacuum generator of claim 1, wherein: The mounting cylinder comprises a cylindrical cylinder provided with external threads at one end, and the dust suction structure is activated carbon material arranged in the cylindrical cylinder.

3. The sound attenuation device for a negative pressure vacuum generator of claim 2, wherein: The mounting cylinder is coated with sound insulation material on the outside.

4. The sound attenuation device for a negative pressure vacuum generator of claim 1, wherein: The muffling cylinder comprises a cylindrical cylinder with a diameter larger than that of the mounting cylinder, one end of the cylindrical cylinder close to the mounting cylinder is a closed end, the other end is an open end, the mounting cylinder is communicated with the muffling cylinder through the closed end, and the muffling cotton is a cylindrical body with the same diameter and length as the inner diameter of the muffling cylinder, which is arranged in the muffling cylinder.

5. The sound attenuation device for a negative pressure vacuum generator of claim 1, wherein: The gland comprises an inner cover arranged at the end of the muffling cylinder, an outer cover arranged on the outside of the inner cover, and a locking structure connecting the inner cover and the outer cover, the inner cover is a circular cover piece, the circular cover piece is provided with exhaust holes and material holes, the material holes are large through holes arranged at the center of the circular cover piece, the exhaust holes are a plurality of small through holes arranged at equal distances around the material holes, the outer cover is a circular cover piece with the same shape as the inner cover, and the circular cover piece is provided with exhaust holes corresponding to the exhaust holes of the inner cover.

6. The sound attenuation device for a negative pressure vacuum generator of claim 5, wherein: The locking structure comprises internal threads arranged at the exhaust holes of the inner cover and bolts penetrating the exhaust holes of the outer cover and screwing with the internal threads.

7. The sound attenuation device for a negative pressure vacuum generator of claim 1, wherein: An earring is arranged on the outer wall of the muffling cylinder for mounting and fixing the negative pressure vacuum generator body.

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