CN111043438A

CN111043438A - Silencing device for air pressure system

Info

Publication number: CN111043438A
Application number: CN201911394690.2A
Authority: CN
Inventors: 李伟旭
Original assignee: Tongxiang Xiliang Tin Cans Co ltd
Current assignee: Tongxiang Xiliang Tin Cans Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-04-21

Abstract

The invention provides a silencing device for an air pressure system, and belongs to the technical field of air pressure transmission equipment. Its first amortization subassembly, the second amortization subassembly, the third amortization subassembly, the first amortization seat of first amortization subassembly is the indent formula, middle amortization chamber that forms, first amortization membrane passes through amortization membrane installation unit mount in the amortization intracavity of first amortization seat, the amortization of second amortization subassembly is divided the one end of pipe and is connected with first amortization hole, the other end that the amortization was divided the pipe collects and is connected with the one end of amortization house steward, the other end of amortization house steward and the one end of amortization flaring are connected, all install the amortization pad in amortization branch pipe and the amortization house steward, cellular amortization stopper is located one side of the other end of amortization flaring, the. The invention not only can effectively reduce the noise of the pipeline and has very good noise reduction effect, but also can quickly realize the replacement of the sintered stainless steel microporous plate.

Description

Silencing device for air pressure system

Technical Field

The invention relates to the technical field of pneumatic transmission equipment, in particular to a silencing device for a pneumatic system.

Background

Pneumatic transmission is a transmission mode widely used in recent decades after mechanical, electrical and hydraulic transmission, and uses compressed air as a working medium to transmit energy and signals so as to realize production automation. The pneumatic transmission system mainly comprises: 1. air supply device, equipment for obtaining compressed air, air purification equipment, such as air compressor, air dryer, etc. 2. The actuating element is a device for converting the pressure energy of the gas into mechanical energy, and is also a device for outputting system energy, such as a cylinder, a gas motor and the like. 3. And the control element is used for controlling the pressure, the flow rate and the flow direction of the compressed air and elements of a system executive element working program, such as a pressure valve, a flow valve, a directional valve, a logic element and the like. 4. Auxiliary elements for auxiliary purposes, such as filters, misters, mufflers, radiators, coolers, amplifiers, pipes, etc. The pneumatic transmission system has the following advantages: 1. air is used as a medium, the air is inexhaustible, the source is convenient, the air is directly discharged after use, the environment is not polluted, and an air return pipeline is not needed, so that the pipeline is not complicated. 2. The air viscosity is small, the pipeline flow energy loss is small, and the device is suitable for long-distance delivery of centralized air supply. 3. The safety and reliability are realized, the problems of fire prevention and explosion prevention are not needed, and the device can work in the environments of high temperature, radiation, humidity, dust and the like. 4. The pneumatic transmission reaction is rapid. 5. The pneumatic element has the advantages of simple structure, easy processing, long service life, convenient maintenance, difficult blockage of pipelines, no deterioration and replacement of media and the like. In the pneumatic transmission pipeline, when compressed air is emptied, great emptying noise can be generated at the tail end of the pipeline, the silencer is a device for reducing the noise of the pipeline, the conventional silencing device generally directly adopts a micro-perforated plate type, generally is made of a pure metal thin plate with the thickness of less than 1mm, the thin plate is perforated by a drill bit with the aperture of less than 1mm, the perforation rate is 1 percent-5 percent, different perforation rates and different cavity depths of the plate thickness are selected, the frequency spectrum performance of the silencer can be controlled, and the silencer can obtain good silencing effect in a required frequency range. But its noise cancelling effect only relies on the noise cancelling effect of micro-perforation, and noise cancelling effect is not very ideal, and in the higher environment of requirement to the environmental silence, micro-perforated plate formula muffler hardly satisfies the requirement. And the micro-perforated plate can cause serious blockage in the long-term use process and influence the discharge of compressed air. The micro-perforated plate is generally directly welded on the silencing tube cavity, the replacement is very inconvenient, and the service life of the silencing device is short.

Disclosure of Invention

The invention aims to provide a silencing device for a pneumatic system, which can effectively reduce the noise of a pipeline and has a very good silencing effect, and a sintered stainless steel microporous plate can be quickly replaced, so that the service life of the silencing device is greatly prolonged.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a silencing device for an air pressure system comprises a silencing pipe fitting, a silencing pipe joint, a first silencing assembly, a second silencing assembly and a third silencing assembly, wherein the silencing pipe fitting is in a round pipe shape, two ends of the silencing pipe fitting are respectively provided with a silencing pipe joint thread and an exhaust cover thread, the silencing pipe joint is in threaded connection with the silencing pipe joint of the silencing pipe fitting, the first silencing assembly is arranged in the silencing pipe fitting and comprises a first silencing support plate, a first silencing seat, a first silencing film and a silencing film mounting assembly, the first silencing support plate is coaxially fixed in the silencing pipe fitting, the first silencing seat is coaxially fixed on the first silencing support plate, first silencing holes are uniformly distributed on the first silencing support plate and are uniformly distributed on the outer side of the first silencing seat, the first silencing seat is in a concave type, a silencing cavity is formed in the middle of the silencer, the first silencing film is installed in the silencing cavity of the first silencing seat through a silencing film installation component, the second silencing component comprises a silencing branch pipe, a silencing main pipe, a silencing pad, a silencing flaring and a honeycomb silencing plug, one end of the silencing branch pipe is connected with the first silencing hole, the other end of the silencing branch pipe is converged and connected with one end of the silencing main pipe, the other end of the silencing main pipe is connected with one end of the silencing flaring, the silencing pads are installed in the silencing branch pipe and the silencing main pipe, the honeycomb silencing plug is installed in a silencing pipe fitting and is positioned on one side of the other end of the silencing flaring, the third silencing component comprises a sintered stainless steel microporous plate, a microporous plate annular supporting seat and a microporous plate retaining ring, the microporous plate supporting seat is connected with an exhaust cover of the silencing pipe fitting in a threaded manner, an installation boss and a retaining ring installation groove are arranged on the inner cavity of the microporous plate supporting seat, the sintered stainless steel microporous plate is coaxially arranged on the inner cavity of the annular microporous plate supporting seat, the microporous plate retaining ring is arranged on the retaining ring mounting groove of the inner cavity of the annular microporous plate supporting seat, and the sintered stainless steel microporous plate is positioned between the microporous plate retaining ring and the mounting boss.

Further, an O-shaped sealing ring is arranged between the silencing pipe joint and the silencing pipe fitting.

Furthermore, the silencing film mounting assembly comprises a silencing film mounting screw and a silencing film pressing backing ring, the silencing film pressing backing ring is arranged between the silencing film mounting screw and the first silencing film, mounting grooves are uniformly distributed in the silencing film pressing backing ring, the number of the mounting grooves is the same as that of the silencing film mounting screw, and the silencing film mounting screw penetrates through the mounting grooves in the silencing film pressing backing ring to be in threaded connection with the first silencing seat.

Furthermore, the silencing film pressing backing ring is an adsorption type rubber pressing backing ring.

Furthermore, the silencing film pressing backing ring comprises a rubber layer and a magnetic layer, the cross section of the rubber layer is in an inverted U shape, and the magnetic layer is embedded in the inverted U-shaped rubber layer.

Further, the silencing pad is made of polyester sound absorption cotton.

Furthermore, an elastic rubber sealing ring is arranged on one side, close to the sintered stainless steel microporous plate, of the microporous plate retainer ring.

Compared with the prior art, the invention has the following advantages and effects: the high-pressure gas enters the silencing pipe fitting from the silencing pipe joint, firstly rushes to the first silencing film, the first silencing film is a flexible film with a porous structure and has a good silencing effect on the high-pressure gas, the gas passing through the first silencing film enters the silencing cavity, then goes out of the side wall of the silencing cavity of the first silencing seat, passes through the first silencing film again and realizes silencing again. Then, the gas enters the plurality of silencing branch pipes from the plurality of first silencing holes and then is collected in the silencing main pipe, and when the gas passes through the silencing branch pipes and the silencing main pipe, silencing of the gas is achieved again through silencing pads arranged in the silencing branch pipes and the silencing main pipe. Then, the gas passes through the silencing flaring and the honeycomb silencing plug, the silencing effect of the honeycomb silencing plug on the gas is very good, but the flow limit of the honeycomb silencing plug on the gas is large, and in order not to influence the exhaust, the silencing flaring is specially designed, and the structure of the silencing flaring not only ensures good exhaust amount, but also plays a good silencing effect. Then, the gas passes through a sintered stainless steel microporous plate to realize final silencing treatment and then exhaust. The sintered stainless steel microporous plate has good silencing effect on gas, high temperature resistance, high porosity, stable pores, good strength, good corrosion resistance and long service life. Because the sintered stainless steel microporous plate can cause serious blockage in the long-term use process and influence the discharge of compressed air, the sintered stainless steel microporous plate needs to be replaced. The annular bearing seat of the micropore plate is firstly rotated and unscrewed, then the micropore plate retainer ring is detached, the sintered stainless steel micropore plate is taken out, a new sintered stainless steel micropore plate is replaced, the micropore plate retainer ring is clamped in, and the sintered stainless steel micropore plate can be replaced by screwing in the annular bearing seat of the micropore plate. The O-shaped sealing ring is arranged between the silencing pipe joint and the silencing pipe fitting, so that the structure is simple, the sealing effect is good, and the cost is low. The silencing branch pipes and the silencing main pipe are internally provided with silencing pads, the silencing pads are made of polyester sound absorption cotton, polyester fibers are hot-pressed by high technology and are formed in a cocoon cotton shape, the sound absorption coefficient reaches 0.94 within the noise range of 125-4000 HZ, and the silencing branch pipes and the silencing main pipe are particularly arranged in a pipeline, so that the suction effect is very good. One side of the micropore plate retainer ring, which is close to the sintered stainless steel micropore plate, is provided with an elastic rubber sealing ring, so that the sealing effect is achieved, and the gas is favorably discharged through the sintered stainless steel micropore plate, so that the silencing effect is improved. The invention not only can effectively reduce the noise of the pipeline and has very good silencing effect, but also can quickly realize the replacement of the sintered stainless steel microporous plate, thereby greatly prolonging the service life of the silencing device.

Drawings

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

Fig. 2 is a partial enlarged view of the invention at a in fig. 1.

Fig. 3 is a partial enlarged view of the invention at B in fig. 1.

FIG. 4 is a side view of the first acoustic assembly of the present invention.

FIG. 5 is a cross-sectional view of a sound-damping membrane press fit grommet in accordance with the present invention.

In the figure: 1. the silencer comprises a silencer pipe fitting, 2, a silencer pipe joint, 3, a first silencer component, 4, a second silencer component, 5, a third silencer component, 6, silencer pipe joint threads, 7, exhaust cover threads, 8, a first silencer supporting plate, 9, a first silencer seat, 10, a first silencer membrane, 11, a silencer membrane mounting component, 12, a first silencer hole, 13, a silencer cavity, 14, a silencer branch pipe, 15, a silencer main pipe, 16, a silencer pad, 17, a silencer flaring, 18, a honeycomb silencer plug, 19, a sintered stainless steel microporous plate, 20, a microporous plate annular supporting seat, 21, a microporous plate retainer ring, 22, a mounting boss, 23, a retainer mounting groove, 24, an O-shaped sealing ring, 25, a silencer membrane mounting screw, 26, a silencer membrane pressing pad ring, 27, a mounting groove, 28, a rubber layer, 29, a magnetic layer and 30 an elastic rubber sealing ring.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, a silencer for a pneumatic system comprises a silencing pipe fitting 1, a silencing pipe joint 2, a first silencing component 3, a second silencing component 4 and a third silencing component 5, wherein the silencing pipe fitting 1 is in a circular pipe shape, two ends of the silencing pipe fitting 1 are respectively provided with a silencing pipe joint thread 6 and an exhaust cover thread 7, the silencing pipe joint 2 is connected with the silencing pipe joint thread 6 of the silencing pipe fitting 1, and an O-shaped sealing ring 24 is arranged between the silencing pipe joint 2 and the silencing pipe fitting 1. The first silencing component 3 is arranged in the silencing pipe fitting 1, the first silencing component 3 comprises a first silencing support plate 8, a first silencing seat 9, a first silencing film 10 and a silencing film installation component 11, the first silencing support plate 8 is coaxially fixed in the silencing pipe fitting 1, the first silencing seat 9 is coaxially fixed on the first silencing support plate 8, first silencing holes 12 are uniformly distributed on the first silencing support plate 8, the first silencing holes 12 are uniformly distributed on the outer side of the first silencing seat 9, the first silencing seat 9 is concave, a silencing cavity 13 is formed in the middle of the first silencing seat 9, the first silencing film 10 is installed in the silencing cavity 13 of the first silencing seat 9 through the silencing film installation component 11, the second silencing component 4 comprises a silencing branch pipe 14, a silencing main pipe 15, a silencing pad 16, a silencing flared opening 17 and a honeycomb silencing plug 18, one end of the branch pipe 14 is connected with the first silencing hole 12, the other end of the silencing branch pipe 14 is converged and connected with one end of the silencing main pipe 15, the other end of the silencing main pipe 15 is connected with one end of the silencing flared opening 17, silencing pads 16 are mounted in the silencing branch pipe 14 and the silencing main pipe 15, the silencing pads 16 are polyester sound absorption cotton, polyester fibers are hot-pressed by high technology and formed in a cocoon cotton shape, the sound absorption coefficient reaches 0.94 within a noise range of 125-4000 HZ, and the suction effect is very good when the silencing branch pipe is particularly arranged in a pipeline. The cellular silencing plug 18 is installed in the silencing pipe fitting 1, the cellular silencing plug 18 is located on one side of the other end of the silencing flared opening 17, the third silencing component 5 comprises a sintered stainless steel microporous plate 19, a microporous plate annular supporting seat 20 and a microporous plate retainer ring 21, the microporous plate supporting seat 20 is connected with an exhaust cover thread 7 of the silencing pipe fitting 1, an installation boss 22 and a retainer ring installation groove 23 are arranged on an inner cavity of the microporous plate annular supporting seat 20, the sintered stainless steel microporous plate 19 is coaxially installed on the inner cavity of the microporous plate annular supporting seat 20, the microporous plate retainer ring 21 is installed on the retainer ring installation groove 23 of the inner cavity of the microporous plate annular supporting seat 20, and the sintered stainless steel microporous plate 19 is located between the microporous plate retainer ring 21 and the installation. One side of the micropore plate retainer ring 21, which is close to the sintered stainless steel micropore plate 19, is provided with an elastic rubber seal ring 30, so that the sealing effect is achieved, the gas is favorably discharged through the sintered stainless steel micropore plate 19, and the silencing effect is improved.

The silencing film mounting assembly 11 comprises a silencing film mounting screw 25 and a silencing film pressing backing ring 26, the silencing film pressing backing ring 26 is arranged between the silencing film mounting screw 25 and the first silencing film 10, mounting grooves 27 are uniformly distributed on the silencing film pressing backing ring 26, the number of the mounting grooves 27 is the same as that of the silencing film mounting screw 25, and the silencing film mounting screw 25 penetrates through the mounting groove 27 on the silencing film pressing backing ring 26 and is in threaded connection with the first silencing seat 9. The silencing membrane pressing backing ring 26 is an adsorption type rubber pressing backing ring. The sound-absorbing film pressing backing ring 26 comprises a rubber layer 28 and a magnetic layer 29, wherein the cross section of the rubber layer 28 is in an inverted U shape, and the magnetic layer 29 is embedded in the inverted U-shaped rubber layer 28. The sound-damping film pressing backing ring 26 has good adsorption performance, the arrangement of the sound-damping film pressing backing ring 26 ensures the installation stability of the first sound-damping film 10, the pressing performance of the first sound-damping film 10 is good, and the good sound-damping effect of the first sound-damping film 10 on high-pressure air is ensured.

According to the technical scheme, when the silencer for the air pressure system is used, high-pressure gas enters the silencing pipe fitting 1 from the silencing pipe joint 2, the high-pressure gas firstly rushes to the first silencing film 10, the first silencing film 10 is a flexible thin film with a porous structure and has a good silencing effect on the high-pressure gas, the gas passing through the first silencing film 10 enters the silencing cavity 13, then goes out of the side wall of the silencing cavity 13 of the first silencing seat 9 and passes through the first silencing film 10 again, and silencing is achieved again. Then, the gas enters the plurality of branch muffling pipes 14 from the plurality of first muffling holes 12 and then is collected in the main muffling pipe 15, and when the gas passes through the branch muffling pipes 14 and the main muffling pipe 15, the muffling pads 16 installed in the branch muffling pipes 14 and the main muffling pipe 15 again perform muffling of the gas. Then, the gas passes through the silencing flared opening 17 and the honeycomb silencing plug 18, the silencing effect of the honeycomb silencing plug 18 on the gas is very good, but the flow limit of the honeycomb silencing plug 18 on the gas is also large, and in order not to influence the exhaust, the silencing flared opening 17 is specially designed, and the structure of the silencing flared opening 17 not only ensures good exhaust amount, but also has good silencing effect. Then, the gas passes through a sintered stainless steel microporous plate 19, and is exhausted after the final silencing treatment is realized. The sintered stainless steel micropore 19 plate has good gas silencing effect, high temperature resistance, high porosity, stable pores, good strength, good corrosion resistance and long service life. Because the sintered stainless steel microporous plate 19 can cause serious blockage in the long-term use process and influence the discharge of compressed air, the sintered stainless steel microporous plate 19 needs to be replaced. Firstly, the annular bearing seat 20 of the micropore plate is screwed off in a rotating way, then the micropore plate retainer ring 21 is dismounted, the sintered stainless steel micropore plate 19 is taken out, a new sintered stainless steel micropore plate 19 is replaced, the micropore plate retainer ring 21 is clamped, and the sintered stainless steel micropore plate 19 can be replaced by screwing in the annular bearing seat 20 of the micropore plate. The invention not only can effectively reduce the noise of the pipeline and has very good silencing effect, but also can quickly realize the replacement of the sintered stainless steel microporous plate 19, thereby greatly prolonging the service life of the silencing device.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A silencer assembly for a pneumatic system, comprising: the silencer comprises a silencing pipe fitting, a silencing pipe joint, a first silencing assembly, a second silencing assembly and a third silencing assembly, wherein the silencing pipe fitting is in a round pipe shape, two ends of the silencing pipe fitting are respectively provided with a silencing pipe joint thread and an exhaust cover thread, the silencing pipe joint is in threaded connection with the silencing pipe joint of the silencing pipe fitting, the first silencing assembly is arranged in the silencing pipe fitting and comprises a first silencing support plate, a first silencing seat, a first silencing film and a silencing film mounting assembly, the first silencing support plate is coaxially fixed in the silencing pipe fitting, the first silencing seat is coaxially fixed on the first silencing support plate, first silencing holes are uniformly distributed on the first silencing support plate and are uniformly distributed on the outer side of the first silencing seat, the first silencing seat is in a concave shape, a silencing cavity is formed in the middle of the first silencing seat, the first silencing film is mounted in the silencing cavity of the first silencing seat through the silencing film mounting assembly, the second silencing component comprises a silencing branch pipe, a silencing main pipe, silencing pads, silencing flaring holes and a cellular silencing plug, one end of the silencing branch pipe is connected with the first silencing hole, the other end of the silencing branch pipe is converged and connected with one end of the silencing main pipe, the other end of the silencing main pipe is connected with one end of the silencing flaring holes, the silencing pads are arranged in the silencing branch pipe and the silencing main pipe respectively, the cellular silencing plug is arranged in the silencing pipe fitting and is positioned at one side of the other end of the silencing flaring holes, the third silencing component comprises a sintered stainless steel microporous plate, a microporous plate annular supporting seat and a retainer ring, the microporous plate supporting seat is in threaded connection with an exhaust cover of the silencing pipe fitting, an installation boss and a retainer ring installation groove are arranged on the inner cavity of the microporous plate annular supporting seat, and the sintered stainless steel microporous plate is coaxially installed on the inner cavity of the microporous plate annular supporting seat, the micropore plate retainer ring is arranged on a retainer ring mounting groove of the inner cavity of the micropore plate annular support seat, and the sintered stainless steel micropore plate is positioned between the micropore plate retainer ring and the mounting boss.

2. The acoustic silencer assembly of claim 1, wherein: an O-shaped sealing ring is arranged between the silencing pipe joint and the silencing pipe fitting.

3. The acoustic silencer assembly of claim 1, wherein: the utility model discloses a silencing membrane installation component, including silencing membrane installation screw and silencing membrane pressfitting backing ring, silencing membrane pressfitting backing ring sets up between silencing membrane installation screw and first silencing membrane, the equipartition has the mounting groove on the silencing membrane pressfitting backing ring, and the quantity of mounting groove is the same with the quantity of silencing membrane installation screw, silencing membrane installation screw passes mounting groove and first amortization seat threaded connection on the silencing membrane pressfitting backing ring.

4. A silencer assembly according to claim 3, wherein: the silencing film pressing backing ring is an adsorption type rubber pressing backing ring.

5. The acoustic silencer assembly of claim 4, wherein: the silencing film pressing backing ring comprises a rubber layer and a magnetic layer, the cross section of the rubber layer is in an inverted U shape, and the magnetic layer is embedded in the inverted U-shaped rubber layer.

6. The acoustic silencer assembly of claim 1, wherein: the silencing pad is made of polyester sound absorption cotton.

7. The acoustic silencer assembly of claim 4, wherein: and one side of the micropore plate retainer ring, which is close to the sintered stainless steel micropore plate, is provided with an elastic rubber sealing ring.