CN217314884U - High-pressure air gun noise reduction device for cleaning net of motor train unit - Google Patents
High-pressure air gun noise reduction device for cleaning net of motor train unit Download PDFInfo
- Publication number
- CN217314884U CN217314884U CN202220068351.6U CN202220068351U CN217314884U CN 217314884 U CN217314884 U CN 217314884U CN 202220068351 U CN202220068351 U CN 202220068351U CN 217314884 U CN217314884 U CN 217314884U
- Authority
- CN
- China
- Prior art keywords
- uproar
- air
- pipe
- making
- gun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 31
- 238000004140 cleaning Methods 0.000 title claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 241000271559 Dromaiidae Species 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 17
- 125000004122 cyclic group Chemical group 0.000 abstract description 7
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 125000003003 spiro group Chemical group 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model relates to an air gun technical field, concretely relates to EMUs are cleaned net and are used high-pressure air gun noise reduction device, including rifle and the tuber pipe of being connected with the air gun, the tuber pipe is kept away from air gun one end threaded connection and is fallen the wind-jet head that makes an uproar, falls to make an uproar to keep away from the wind pipe one end and be provided with the tuyere, can dismantle in the wind-jet head that makes an uproar to make an uproar and install the noise reducer, the noise reducer adopts the amortization material, has seted up multiunit Laval gas pocket on it; the utility model discloses a setting up the wind-jet head of making an uproar that falls in the tuber pipe end, fall to make an uproar and be provided with in the wind-jet head of making an uproar and fall noise reducer and amortization filler, through the effect of falling the effect of the ware multiunit laval gas pocket of making an uproar, and set up the cyclic annular acoustic baffle of multiunit at laval gas pocket inner wall, a speed for reduce the air current, thereby effective noise reduction, simultaneously through the noise elimination effect of the material of the ware of making an uproar itself and amortization filler, the effect of the amortization of making an uproar falls in the wind-jet head of further improving the noise reduction, and then reduce the noise influence to the operator.
Description
Technical Field
The utility model relates to a wind rifle technical field, concretely relates to clear net of EMUs falls device of making an uproar with high-pressure wind rifle.
Background
The motor car equipment compartment is a through type, equipment in the compartment is complex, the structure dead angle is large, a main transformer, an auxiliary transformer, an APU (auxiliary Power Unit), a distribution box, a bearing box and the like are arranged in the compartment and need to be kept clean, otherwise, the heat dissipation of the main transformer and the auxiliary transformer is poor, the insulation performance of the electric device is reduced, and accidents are easy to happen during operation. And then when the motor train unit is overhauled, the dust removal operation needs to be carried out on the filter screen and the equipment cabin in effective time.
At present, the method adopted for removing dust of the filter screen and the equipment cabin mainly comprises high-pressure air pipe blowing and the like, and the high-pressure air is used for blowing off dust attached to the filter screen and electric devices in the equipment cabin. However, when the air gun is used for blowing, compressed air is sprayed out through the air outlet end of the air pipe, so that high noise is generated, bad influence is caused to operators, the working quality is influenced, the communication effect of the interphone is influenced, the operators cannot normally call and respond, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
Solves the technical problem
To the above-mentioned shortcoming that prior art exists, the utility model provides a clear net of EMUs falls device of making an uproar with high-pressure air gun, the compressed gas that can solve prior art air gun effectively is through the end blowout of giving vent to anger of tuber pipe, can produce the problem of great noise.
Technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a clear net of EMUs is with high-pressure air rifle noise reduction device, includes the air gun and falls the tuber pipe of being connected with the air gun, the tuber pipe is kept away from air gun one end threaded connection and is fallen the jet-propelled head of making an uproar, it is provided with the tuyere to fall the jet-propelled head of making an uproar to fall keeps away from tuber pipe one end, demountable installation has the noise reduction ware in the jet-propelled head of making an uproar, the noise reduction ware adopts the amortization material, has seted up multiunit laval gas pocket on it, laval gas pocket inner wall all is provided with the annular acoustic baffle that the multiunit cross section is the hook type, the hook end of annular acoustic baffle is towards tuber pipe one side, fall in the jet-propelled head of making an uproar and fall to fill between the noise reduction ware and have the amortization filler.
Furthermore, the air nozzle is internally threaded with an end cover body used for limiting the noise reducer, the end cover body comprises a spiral ring, end nozzle pipes are coaxially fixed in the spiral ring through a plurality of groups of supports, and a ring support used for limiting the noise reducer is arranged on the inner wall of the noise-reducing air-jet head.
Furthermore, an air outlet threaded nozzle in threaded connection with the noise reduction air nozzle is fixed at one end, far away from the air gun, of the air pipe.
Furthermore, the air pipe is internally sleeved with a pressure-resistant hose, and one end of the pressure-resistant hose is communicated with the air outlet threaded nozzle.
Further, the air gun includes the rifle body and the handle of a gun of slope setting on the rifle body, the internal pipe that is fixed with the connecting pipe respectively of rifle and communicates with the connecting pipe, air-out screw thread mouth one end is kept away from to the tuber pipe penetrates the rifle internally and is provided with first pipe chute end, the connecting pipe is kept away from pipe one end and is provided with the second pipe chute end of being connected with first pipe chute end rotation, the pipe other end is fixed with air inlet screw thread mouth, air inlet screw thread mouth fixes on the rifle body, the internal driving motor who is used for driving first pipe chute end pivoted that still is provided with of rifle, pressure hose penetrates connecting pipe and communicates with air inlet screw thread mouth.
Furthermore, the gun handle is also provided with a button for controlling the forward and reverse rotation of the driving motor.
Advantageous effects
Adopt the utility model provides a technical scheme compares with known public technique, has following beneficial effect:
the utility model discloses a setting up at the tuber pipe end and falling the wind-blowing head of making an uproar, fall to make an uproar and be provided with in the wind-blowing head of making an uproar and fall noise reduction filler, through the effect of falling the effect of the ware multiunit laval gas pocket of making an uproar, and set up the cyclic annular acoustic baffle of multiunit at laval gas pocket inner wall, a speed for reduce the air current, thereby effective noise reduction, simultaneously through the noise elimination effect of the material of the ware of making an uproar itself and noise reduction filler, the effect of the amortization of making an uproar falls in the wind-blowing head of further reducing an uproar, and then reduce the noise influence to the operator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view of an overall first viewing angle structure of the present invention;
fig. 2 is a schematic view of an overall second viewing angle structure of the present invention;
FIG. 3 is a schematic view of the overall cross-sectional structure of the present invention;
fig. 4 is an enlarged schematic structural view of a portion a in fig. 3 according to the present invention;
fig. 5 is an enlarged schematic structural view of the utility model at the position B in fig. 3;
fig. 6 is an enlarged schematic structural view of the utility model at C in fig. 5;
FIG. 7 is a schematic view of a noise-reducing air-jet structure according to the present invention;
fig. 8 is a schematic view of the connection structure between the air pipe and the connection pipe of the present invention;
the reference numerals in the drawings represent: 1. an air duct; 101. an air outlet threaded nozzle; 102. a first beveled pipe end; 2. a noise reduction nozzle; 3. a noise reducer; 301. laval pores; 3011. a first cone opening; 3012. a narrow throat; 3013. a second tapered port; 302. an annular sound blocking plate; 4. a sound-deadening filler; 5. a spiro ring; 6. a support; 7. an end nozzle tube; 8. a ring support; 9. a pressure-resistant hose; 10. a gun body; 11. a gun handle; 12. a connecting pipe; 1201. a second beveled pipe end; 13. a conduit; 1301. an air inlet threaded nozzle; 14. a drive motor; 15. a button; 16. an arc frame; 17. a disc bearing; 18. a ring gear; 19. a gear; 20. a universal joint; 21. a drive shaft; 22. a coupling is provided.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Examples
The high-pressure air gun noise reduction device for cleaning the net of the motor train unit in the embodiment refers to fig. 1-8: including the air gun and with the tuber pipe 1 that the air gun is connected, tuber pipe 1 is kept away from air gun one end threaded connection and is fallen the jet-propelled head 2 of making an uproar, it is provided with the tuyere to fall 1 one end of tuber pipe of jet-propelled head 2 of making an uproar to fall, demountable installation has the noise reduction ware 3 in the jet-propelled head 2 of making an uproar, the noise reduction ware 3 adopts the amortization material, multiunit laval gas pocket 301 has been seted up on it, laval gas pocket 301 inner wall all is provided with the annular acoustic baffle 302 that the multiunit cross section is the hook type, the hook end of annular acoustic baffle 302 is towards tuber pipe 1 one side, it has amortization filler 4 to fall to fill between the jet-propelled head 2 of making an uproar and the noise reduction ware 3.
Through having seted up multiunit laval gas pocket 301 in noise reducer 3 for the dispersion effect that the gas from tuber pipe 1 spun passes through multiunit laval gas pocket 301, reduce gaseous velocity of flow, and then effective noise abatement, through set up multiunit cross section for the cyclic annular acoustic baffle 302 of hook type at laval gas pocket 301 inner wall, block layer upon layer as the cyclic annular acoustic baffle 302 that the air current passes through multiunit hook type, further reduce the gas velocity of flow, then further noise reduction, and when the noise that produces when the air current passes through laval gas pocket 301 got into the cyclic annular acoustic baffle 302 of multiunit hook type, its noise part was "absorbed" by the amortization material of noise reducer 3 itself, its noise meets the blocking limit thermal dissipation of the cyclic annular acoustic baffle 302 of multiunit hook type simultaneously, thereby realize the noise elimination.
Meanwhile, the laval air holes 301 have the function of accelerating the air flow and are used for offsetting the reduced speed of the air flow passing through the plurality of groups of hook-shaped annular sound blocking plates 302, so that the sprayed air flow is ensured to have a certain speed and dust can be blown off; when the air flow is sprayed out of the Laval air holes 301 for a certain distance, the air flow can be gathered together, and meanwhile, when the air flows out, a vacuum area can be formed around the Laval air holes 301, so that the surrounding air can be driven, the energy-saving effect is achieved, and the energy is saved by more than 50%.
The Laval air hole 301 has the following specific working principle: when the airflow enters the first taper port 3011, the airflow follows the principle that when the fluid moves in the tube, the flow velocity at the small section is high, and the flow velocity at the large section is low, so the airflow is accelerated continuously, when the airflow reaches the narrow throat 3012, the flow velocity of the airflow exceeds the sonic velocity, and when the transonic fluid moves, the airflow no longer follows the principle that the flow velocity at the small section is high, and the flow velocity at the large section is low, but the opposite is true, the larger the section is, the faster the flow velocity is, and further when the airflow enters the second taper port 3013, the flow velocity is further accelerated.
Among this technical scheme, for the effect that improves 3 noise reduction amortizations of making an uproar that fall, the preferred polyurethane of its material, the amortization filler 4 is also preferred amortization cotton simultaneously to improve the effect that the amortization of making an uproar falls in the shower nozzle 2 of making an uproar.
The device is through setting up the shower nozzle 2 of making an uproar that falls in 1 pipe end of tuber pipe, it is provided with 3 and the amortization filler 4 of making an uproar to fall in the shower nozzle 2 of making an uproar, effect through 3 multiunit laval gas pockets 301 of making an uproar falls, and set up the cyclic annular acoustic baffle of multiunit 302 at laval gas pocket 301 inner wall, a speed for reducing the air current, thereby effective noise reduction, simultaneously through the effect of making an uproar of 3 own materials of falling and amortization filler 4 of making an uproar, the effect of the amortization of making an uproar 2 falls in the further improvement, and then reduce the noise influence to the operator.
Wherein, tuyere female connection has the end cover body that is used for 3 spacing of falling the ware of making an uproar, and the end cover body includes the spiro 5, has end mouth pipe 7 through the coaxial fixed of multiunit support 6 in the spiro 5, falls 2 inner walls of the wind nozzle of making an uproar and is provided with the ring that is used for 3 spacing of falling the ware of making an uproar and holds in the palm 8.
When the spiral ring 5 is spirally taken down from the inner part of the tuyere, the noise reducer 3 and the silencing filler 4 can be replaced, so that the noise reducer 3 and the silencing filler 4 can be replaced conveniently; meanwhile, the noise reducer 3 is limited by the end cover body and the ring support 8, so that the noise reducer 3 is stably positioned in the noise reduction nozzle 2.
In the technical scheme, the air gun comprises a gun body 10 and a gun handle 11 obliquely arranged on the gun body 10; wherein, be fixed with connecting pipe 12 and the pipe 13 of communicating with connecting pipe 12 respectively in the rifle body 10, the tuber pipe 1 is kept away from air-out threaded nozzle 101 one end and is penetrated in the rifle body 10 and be provided with first pipe chute end 102, and connecting pipe 12 is kept away from pipe 13 one end and is provided with the second pipe chute end 1201 of being connected with first pipe chute end 102 rotation, still is provided with in the rifle body 10 and is used for driving first pipe chute end 102 pivoted driving motor 14.
Through the rotation connection of the first inclined pipe end 102 and the second inclined pipe end 1201, when the driving motor 14 drives the first inclined pipe end 102 to rotate, the air pipe 1 rotates around the axis of the first inclined pipe end 102, the angle between the air pipe 1 and the connecting pipe 12 is adjusted, the angle of the sprayed air is controlled conveniently, and an operator can control the air gun to blow off dust at dead angles of electric devices in the equipment cabin conveniently.
Specifically, an air outlet threaded nozzle 101 in threaded connection with the noise reduction nozzle 2 is fixed at one end, far away from the air gun, of the air pipe 1, a pressure-resistant hose 9 is sleeved in the air pipe 1, one end of the pressure-resistant hose 9 is communicated with the air outlet threaded nozzle 101, an air inlet threaded nozzle 1301 is fixed at the other end of the conduit 13, the air inlet threaded nozzle 1301 is fixed on the gun body 10, and the pressure-resistant hose 9 penetrates through the connecting pipe 12 and the conduit 13 and is communicated with the air inlet threaded nozzle 1301; therefore, the fan is communicated with the air inlet threaded nozzle 1301 through an external pipeline, and high-pressure airflow sprayed out of the fan is sprayed out of the noise reduction air nozzle 2 through the pressure-resistant hose 9; the pressure-resistant hose 9 is preferably a metal hose, so that when the angle between the air pipe 1 and the connecting pipe 12 is changed, the pipe body of the pressure-resistant hose 9 cannot be bent, and the circulation of air is ensured.
Wherein, the connecting pipe 12 is fixed in the gun body 10 through the arc frame 16; the first angled tube end 102 is rotatably connected to the second angled tube end 1201 via a disc bearing 17.
The gear ring 18 is arranged on the outer side of the circumference of the first inclined pipe end 102, a gear 19 meshed with the gear ring 18 is rotatably connected in the gun body 10 through a gear shaft, a transmission shaft 21 parallel to the axis of the gun body is further rotatably connected in the gun body 10, the transmission shaft 21 is in transmission fit with the gear shaft through a universal joint 20, and meanwhile, the other end of the transmission shaft 21 is in transmission fit with an output shaft of the driving motor 14 through a coupler 22, so that the driving motor 14 drives the first inclined pipe end 102 to rotate.
In order to adjust the angle between the air duct 1 and the connecting pipe 12, a button 15 for controlling the forward and reverse rotation of the driving motor 14 is further provided on the gun holder 11.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. The utility model provides a clear net of EMUs falls device of making an uproar with high-pressure air gun, includes air gun and tuber pipe (1) of being connected with the air gun, its characterized in that: air hose (1) is kept away from air gun one end threaded connection and is fallen blast nozzle (2) of making an uproar, fall blast nozzle (2) of making an uproar and keep away from tuber pipe (1) one end and be provided with the tuyere, demountable installation has in the blast nozzle (2) of making an uproar and falls ware (3), fall ware (3) of making an uproar and adopt the amortization material, seted up multiunit laval gas pocket (301) on it, laval gas pocket (301) inner wall all is provided with annular sound damping board (302) that the multiunit cross section is the hook type, the hook end face of annular sound damping board (302) is to tuber pipe (1) one side, it has amortization filler (4) to fill in blast nozzle (2) of making an uproar and between falling ware (3) of making an uproar.
2. The high-pressure air gun noise reduction device for the motor train unit net cleaning according to claim 1, wherein an end cover body used for limiting the noise reducer (3) is connected to the air nozzle in a threaded mode, the end cover body comprises a spiral ring (5), an end nozzle pipe (7) is coaxially fixed in the spiral ring (5) through a plurality of groups of supports (6), and a ring support (8) used for limiting the noise reducer (3) is arranged on the inner wall of the noise reduction air nozzle (2).
3. The high-pressure air gun noise reduction device for cleaning the net of the motor train unit according to claim 1, wherein an air outlet threaded nozzle (101) in threaded connection with the noise reduction nozzle (2) is fixed at one end of the air pipe (1) far away from the air gun.
4. The high-pressure air gun noise reduction device for cleaning the net of the motor train unit according to claim 3, wherein a pressure hose (9) is sleeved in the air pipe (1), and one end of the pressure hose (9) is communicated with the air outlet threaded nozzle (101).
5. The high-pressure air gun noise reduction device for motor train unit network cleaning according to claim 4, wherein the air gun comprises a gun body (10) and a gun handle (11) obliquely arranged on the gun body (10), a connecting pipe (12) and a guide pipe (13) communicated with the connecting pipe (12) are respectively fixed in the gun body (10), one end of the air pipe (1) far away from the air outlet threaded nozzle (101) penetrates into the gun body (10) and is provided with a first inclined pipe end (102), one end of the connecting pipe (12) far away from the guide pipe (13) is provided with a second inclined pipe end (1201) rotatably connected with the first inclined pipe end (102), the other end of the guide pipe (13) is fixed with an air inlet threaded nozzle (1301), the air inlet threaded nozzle (1301) is fixed on the gun body (10), a driving motor (14) for driving the first inclined pipe end (102) to rotate is further arranged in the gun body (10), the pressure-resistant hose (9) penetrates through the connecting pipe (12) and the conduit (13) and is communicated with the air inlet threaded nozzle (1301).
6. The high-pressure air gun noise reduction device for motor train unit network cleaning according to claim 5, wherein a button (15) for controlling forward and reverse rotation of a driving motor (14) is further arranged on the gun handle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068351.6U CN217314884U (en) | 2022-01-12 | 2022-01-12 | High-pressure air gun noise reduction device for cleaning net of motor train unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068351.6U CN217314884U (en) | 2022-01-12 | 2022-01-12 | High-pressure air gun noise reduction device for cleaning net of motor train unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217314884U true CN217314884U (en) | 2022-08-30 |
Family
ID=82993489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220068351.6U Expired - Fee Related CN217314884U (en) | 2022-01-12 | 2022-01-12 | High-pressure air gun noise reduction device for cleaning net of motor train unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217314884U (en) |
-
2022
- 2022-01-12 CN CN202220068351.6U patent/CN217314884U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111298584B (en) | Double-venturi pneumatic wet dust removal system | |
| CN206730758U (en) | Negative pressure dust removing device | |
| CN114505317A (en) | Negative pressure dust removal system and regulation and control method thereof | |
| CN217314884U (en) | High-pressure air gun noise reduction device for cleaning net of motor train unit | |
| CN209550150U (en) | A kind of denoising device of sweeping steam pipeline | |
| CN105276650A (en) | Range hood with auxiliary air inlet function | |
| CN216880941U (en) | Negative pressure dust removal system | |
| CN218146948U (en) | Outer sleeve rotary type laser cladding nozzle | |
| CN203268736U (en) | Blockage removing device used for stock bin | |
| CN2195054Y (en) | Jet-suction cooking fume exhauster | |
| CN108544604A (en) | A kind of servo-actuated retracting device of sawdust | |
| CN212563229U (en) | Quick dust collector of tunnelling face | |
| CN105736422B (en) | A kind of ventilation negative-pressure air fan | |
| CN212318393U (en) | Fan silencer with spiral chute | |
| CN209792170U (en) | Sound wave ash removal device | |
| CN209180065U (en) | A kind of noise elimination structure of high pressure blower | |
| CN201152581Y (en) | Indirect driven air-actuated cooking fume exhausting apparatus | |
| CN109731857A (en) | A kind of sound wave ash cleaner | |
| CN210686130U (en) | Low-flow-resistance micro-jet type variable-abortion vortex noise reduction device | |
| CN109692856A (en) | A kind of denoising device and noise-reduction method of sweeping steam pipeline | |
| CN216951024U (en) | High pressure dust exhausting fan silencing device | |
| CN201573079U (en) | Eddy circulating dust-removing heat dissipation system | |
| CN203702590U (en) | Blowing and dust-removing fan | |
| CN213778048U (en) | Energy-saving air feeding and exhausting device for dust-free workshop | |
| CN216857618U (en) | Dust suction device and dust suction system for glass runner brick joints |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220830 |