CN111156202A - Mining is for local fan gas elimination guiding device - Google Patents
Mining is for local fan gas elimination guiding device Download PDFInfo
- Publication number
- CN111156202A CN111156202A CN202010214481.1A CN202010214481A CN111156202A CN 111156202 A CN111156202 A CN 111156202A CN 202010214481 A CN202010214481 A CN 202010214481A CN 111156202 A CN111156202 A CN 111156202A
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- cone
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- cylinder
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- 238000005065 mining Methods 0.000 title claims abstract description 10
- 230000008030 elimination Effects 0.000 title claims description 36
- 238000003379 elimination reaction Methods 0.000 title claims description 36
- 230000030279 gene silencing Effects 0.000 claims abstract description 66
- 230000001681 protective effect Effects 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
- F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Duct Arrangements (AREA)
Abstract
The invention discloses a gas silencing and guiding device for a mining local ventilator, which comprises a multi-stage guiding and silencing cone, a positioning support assembly, a protective cover and a connecting flange, wherein the multi-stage guiding and silencing cone is stacked up and down and distributed in a clearance manner; the opening of the diversion cone of each stage of diversion silencing cone is gradually increased, and the diameter of the diversion cylinder is matched with the aperture of the opening of the diversion cone and is also gradually increased; the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felts; the positioning support assembly comprises a plurality of support rods and a connecting ring, the support rods are arranged between the support tables of each stage of flow guide silencing cone, and the connecting ring is connected with the upper end face of the connecting flange; the protective cover is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover, and the protective cover is covered on the multistage flow guide silencing cone; the lower end of the connecting flange is used for being connected with an air inlet of the ventilator; this device can make in gaseous axial and the annular air intake entering device, reduces the air current noise from the source of air inlet, furthest reduces the air current noise when guaranteeing ventilation efficiency.
Description
Technical Field
The invention relates to the technical field of ventilation and noise reduction of coal mines, in particular to a gas silencing and flow guiding device for a mining local ventilator.
Background
At present, most ventilators applied to local ventilation of coal mines are disrotatory explosion-proof axial fans, noise generated by the fans in work is very high, the average noise sound pressure level at one meter away from the fans is up to 95-115 decibels generally under the condition that existing silencers are installed on the fans according to actual measurement under a plurality of mines, the noise value is higher than 10-30 decibels required by national industrial and enterprise noise health standard, and the noise exceeding amount is very high. At present, some fan manufacturers install silencers at the inlet and outlet of a fan, but the noise reduction of the silencers is below 10 decibels, but the noise reduction effect is poor.
Meanwhile, the fan inlet adopts a conical barrel current collector, the flow loss of the fan is large, the flow state of the air introduced into the impeller is poor, the air flow axially enters the flow channel along the flow guide cap or the silencer, and the noise control of the fan on the air inlet is not fully considered; resulting in a high flow noise of the air. The traditional diversion cap or silencer has the defects of large weight, inconvenient processing and installation and the like in the structure combination mode and the installation mode.
In addition, due to the fact that the working space in a mine is narrow, noise is not easy to attenuate, the noise generated by the ventilator can cause serious noise pollution to the working environment, and the noise harms the physiological health and the psychological health of workers; moreover, due to the masking effect of the noise of the fan, personnel working in a noise environment cannot perform language communication and cannot timely judge and deal with changes in the surrounding working environment, and due to the interference of the noise, the people in the noise environment are dispersed, the working efficiency is reduced, so unsafe accidents are extremely easy to generate in the noise environment, and personal casualty accidents caused by the influence of the noise of the local ventilator are rare; therefore, an efficient noise elimination device capable of reducing the noise of the local ventilator to meet the national noise sanitation standard of industrial enterprises is urgently needed from the aspects of labor protection and safety production.
Disclosure of Invention
The invention aims to provide a gas silencing and guiding device for a mining local ventilator, which can enable gas to enter the device along a radial direction and an annular air inlet, reduce airflow noise from an air inlet source, and reduce the airflow noise to the maximum extent while ensuring the ventilation efficiency.
The technical scheme adopted by the invention is as follows:
a mining is for local ventilator gas noise elimination guiding device, including multistage water conservancy diversion noise elimination awl, locating support subassembly, safety cover and flange, the said multistage water conservancy diversion noise elimination awl is laminated from top to bottom, interval type distribution, every stage includes a water conservancy diversion awl of the cone structure of inversion, the upper edge of the water conservancy diversion awl is extended outwards in parallel to form the annular brace table, the tip of the water conservancy diversion awl has openings, the opening connects a draft tube; the opening of the diversion cone of each stage of diversion silencing cone is gradually enlarged (expanded), and the diameter of the diversion cylinder is matched with the aperture of the opening of the diversion cone and is also gradually enlarged; the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felts; the positioning support assembly comprises a plurality of support rods and a connecting ring, the support rods are arranged between the support tables of each stage of flow guide silencing cone, the lower ends of the support rods below the support table of the final stage of flow guide silencing cone are fixed with the upper end surface of the connecting ring, and the connecting ring is connected with the upper end surface of the connecting flange; the protective cover is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover, the protective cover covers the multistage flow guide noise elimination cone, and the lower end of the protective cover is fixed with the upper end face of the connecting ring; the lower end of the connecting flange is used for being connected with an air inlet of the ventilator.
The multistage flow-guiding silencing cone adopts three stages and comprises a superior flow-guiding silencing cone, a middle flow-guiding silencing cone and a final flow-guiding silencing cone, a guide cylinder suspension of the superior flow-guiding silencing cone is positioned in the guide cone of the middle flow-guiding silencing cone, a guide cylinder suspension of the middle flow-guiding silencing cone is positioned in the guide cone of the final flow-guiding silencing cone, and the lower end of the guide cylinder of the final flow-guiding silencing cone is positioned above the connecting ring.
The upper-stage flow guide silencing cone, the middle-stage flow guide silencing cone and the final-stage flow guide silencing cone are all made of metal plates or are made of rubber or plastic through shaping.
The protective cover comprises a main cover cylinder, a transition ring and a connecting cylinder and is made of a porous plate; the top of the main cover cylinder is in butt welding with a supporting table of a higher-level flow guide noise elimination cone, and the inner side wall of the main cover cylinder is respectively welded and fixed with the outer edge of the supporting table of the third-level flow guide noise elimination cone; the lower edge of the main cover cylinder is welded with the outer circular ring of the transition ring, the inner circular ring of the transition ring is welded with the upper edge of the connection cylinder, and the lower edge of the connection cylinder is fixed with the upper end face of the connection ring.
The three-stage flow guide silencing cone is utilized, the three-stage flow guide silencing cone is in up-down laminated and interval distribution, the opening of the flow guide cone of each stage of flow guide silencing cone is gradually enlarged, and the diameter of the flow guide cylinder is matched with the opening aperture of the flow guide cone and is also gradually enlarged. The opening of the guide cone is gradually increased, and the diameter of the guide cylinder is gradually increased to ensure that the wind current discharged by the guide cylinder of the upper level can be smoothly guided into the air inlet of the ventilator, and ensure that the wind current of the current level can smoothly pass through the guide cylinder of the current level. The three-stage flow guide silencing cone is coaxially installed and fixed from top to bottom, an airflow channel of a gradually expanding type guide cylinder communicated with the air inlet port is formed in the flow guide cone, an annular air inlet is formed in the air inlet port, air can enter the multi-stage flow guide silencing cone along the radial direction and the annular air inlet, air flow can enter the multi-stage flow guide silencing cone from the circumferential direction, air flow noise is reduced from an air inlet source, and the air flow noise is reduced to the maximum extent while the ventilation efficiency is ensured.
Meanwhile, the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felt, when wind current enters the protective cover, the wind current collides with the inner surfaces and the outer surfaces of the guide cone and the guide cylinder, noise carried by the wind current and noise generated by collision are subjected to sound absorption treatment by the sound insulation felt, and therefore noise is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a perspective view of the present invention;
fig. 3 is a schematic perspective view of the construction of the present invention.
Detailed Description
As shown in fig. 1-3, the multi-stage flow-guiding noise-eliminating cone comprises a multi-stage flow-guiding noise-eliminating cone, a positioning bracket assembly, a protective cover 1 and a connecting flange 2, wherein the multi-stage flow-guiding noise-eliminating cone is in an up-down laminated and interval distribution, each stage comprises a flow-guiding cone 3 with an inverted cone structure, the upper edge of the flow-guiding cone 3 extends outwards in parallel to form an annular supporting platform 4, the tip of the flow-guiding cone 3 is provided with an opening, and the opening is connected with a flow-guiding cylinder 5; the opening of the diversion cone 3 of each stage of diversion silencing cone is gradually reduced, and the diameter of the diversion cylinder 5 is gradually increased; and sound-proof felts 6 are paved on the inner surfaces and the outer surfaces of the guide cone 3 and the guide cylinder 5.
As shown in fig. 2, the positioning bracket assembly includes a plurality of support rods 7 and a connecting ring 8, the support rods 7 are disposed between the support platforms 4 of each stage of flow guide noise elimination cone, the lower ends of the support rods 7 below the support platform 4 of the final stage of flow guide noise elimination cone C are fixed to the upper end face of the connecting ring 8, and the connecting ring 8 is connected to the upper end face of the connecting flange 2. The supporting rod 7 is used for supporting the flow guide silencing cone of each stage, so that a certain space is formed between the upper stage and the lower stage of the flow guide silencing cone, and wind flow can enter conveniently. Not only play the effect of support, simultaneously, play certain limited positioning action, with the interval control between the upper and lower level water conservancy diversion noise elimination awl at certain distance, guarantee the high ventilation volume promptly, guarantee again that the noise reduction rate effect is good. Repeated experiments show that the best effect is achieved when the lower end part of the guide shell 5 at the upper stage is arranged 1-3cm above the guide shell 5 at the lower stage.
The protective cover 1 is of a cylindrical structure with an opening at the lower end, a plurality of vent holes 9 are uniformly formed in the protective cover 1, the protective cover 1 covers the multistage flow guide noise elimination cone, and the lower end of the protective cover 1 is fixed with the upper end face of the connecting ring 8; the lower end of the connecting flange 2 is used for being connected with an air inlet of a ventilator.
The multistage flow guide noise elimination cone adopts three stages and comprises a superior flow guide noise elimination cone A, a middle flow guide noise elimination cone B and a final flow guide noise elimination cone C, a guide cylinder 5 suspension of the superior flow guide noise elimination cone A is positioned in a guide cone 3 of the middle flow guide noise elimination cone B, a guide cylinder 5 suspension of the middle flow guide noise elimination cone B is positioned in a guide cone 3 of the final flow guide noise elimination cone C, and the lower end of a guide cylinder 5 of the final flow guide noise elimination cone C is positioned above a connecting ring 8. The invention is not limited to three stages, and can be set according to the use environment condition, and can adopt one stage, two stages, four stages, five stages, multiple stages and the like.
The upper-stage flow guide noise elimination cone A, the middle-stage flow guide noise elimination cone B and the final-stage flow guide noise elimination cone C are all made of metal plates or rubber or plastic by molding.
As shown in fig. 1-3, the protecting cover 1 comprises a main cover cylinder 10, a transition ring 11 and a connecting cylinder 12, which are made of porous plates; the top of the main cover cylinder 10 is in butt welding with the support table 4 of the upper-level flow guide noise elimination cone A, and the inner side wall of the main cover cylinder 10 is respectively welded and fixed with the outer edge of the support table 4 of the third-level flow guide noise elimination cone; the lower edge of the main cover cylinder 10 is welded with the outer circular ring of the transition ring 11, the inner circular ring of the transition ring 11 is welded with the upper edge of the connecting cylinder 12, and the lower edge of the connecting cylinder 12 is fixed with the upper end face of the connecting ring 8.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The flow-guiding silencing cone adopts three stages, and comprises a superior flow-guiding silencing cone A, an intermediate flow-guiding silencing cone B and a final flow-guiding silencing cone C, each stage comprises a flow-guiding cone 3 with an inverted cone structure, the upper edge of the flow-guiding cone 3 extends outwards in parallel to form an annular supporting table 4, the tip of the flow-guiding cone 3 is provided with an opening, the opening is connected with a flow-guiding cylinder 5, and sound-proof felts 6 are paved on the inner surface and the outer surface of the flow-guiding cone 3 and the flow-guiding cylinder 5; the three-stage flow guide silencing cone is made of metal plates or rubber or plastic by shaping. The three-stage flow guide silencing cones are in up-down laminated and intermittent distribution, a guide cylinder 5 suspension of a superior flow guide silencing cone A is positioned in a guide cone 3 of a middle flow guide silencing cone B, a guide cylinder 5 suspension of the middle flow guide silencing cone B is positioned in a guide cone 3 of a final flow guide silencing cone C, and the lower end of a guide cylinder 5 of the final flow guide silencing cone C is positioned above the connecting ring 8; the opening of the diversion cone 3 of each stage of diversion silencing cone is gradually enlarged, and the diameter of the diversion cylinder 5 is gradually enlarged. The opening of the diversion cone 3 is gradually increased (namely, the inclination angle of the diversion cone 3 is gradually increased), the diameter of the diversion cylinder 5 is gradually increased, on one hand, the wind current discharged by the upper diversion cylinder 5 is ensured to be smoothly guided into the air inlet of the ventilator, and on the other hand, the wind current of the current stage is ensured to be smoothly guided through the diversion cylinder 5 of the current stage.
The working principle of the invention is as follows: firstly, the air inlet of the device and the ventilator is connected through the connecting flange 2, the device adopts the connecting flange 2, can be detachably connected on required equipment, and is convenient to detach and install. After the installation is finished, the ventilator works, wind flow is poured into the protective cover 1 from the periphery through the vent holes 9 on the protective cover 1, wind entering the upper end of the protective cover 1 enters through the large opening of the diversion cone 3 with the cone structure of the upper diversion noise elimination cone A, the wind flow forms annular wind flow after passing through the diversion cone 3, and then enters into the diversion cone 3 of the middle diversion noise elimination cone B through the diversion cylinder 5 of the upper diversion noise elimination cone A; the wind flow entering from the middle part of the protective cover 1 directly enters the guide cone 3 of the cone structure of the middle-stage guide silencing cone B, forms an annular wind flow after passing through the guide cone 3, and then enters the guide cone 3 of the final-stage guide silencing cone C from the guide cylinder 5 of the middle-stage guide silencing cone; similarly, the wind flow entering from the lower part of the protective cover 1 directly enters the diversion cone 3 of the cone structure of the final diversion noise elimination cone C, and forms an annular wind flow after passing through the diversion cone 3, and then enters the air inlet of the ventilator from the diversion cylinder 5 of the final diversion noise elimination cone.
Meanwhile, as the inner surfaces and the outer surfaces of the guide cone 3 and the guide cylinder 5 are respectively paved with the sound insulation felt 6, after the wind current enters the protective cover 1, the wind current collides with the inner surfaces and the outer surfaces of the guide cone 3 and the guide cylinder 5, and the noise carried by the wind current and the noise sent by the collision are absorbed by the sound insulation felt 6, so that the noise is reduced.
Because the multistage flow guide silencing cone is coaxially installed and fixed from top to bottom, an airflow channel of a gradually expanding type guide cylinder 5 communicated with an air inlet port is formed in the flow guide cone 3, an annular air inlet is formed at the air inlet port, air can enter the multistage flow guide silencing cone along the axial direction and the annular air inlet, and airflow can enter the multistage flow guide silencing cone from the circumferential direction, airflow noise is reduced from an air inlet source, and the airflow noise is reduced to the maximum extent while the ventilation efficiency is ensured.
The materials of the invention are all light and high-efficiency composite novel material products, thus reducing occupied space, facilitating installation and maintenance of facilities, realizing ventilation and sound insulation.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The utility model provides a mining is gas elimination guiding device for auxiliary ventilating fan which characterized in that: the multi-stage flow guide silencing cone is in up-down laminated and interval distribution, each stage comprises a flow guide cone with an inverted cone structure, the upper edge of the flow guide cone extends outwards in parallel to form an annular support table, the tip of the flow guide cone is provided with an opening, and the opening is connected with a flow guide cylinder; the opening of the diversion cone of each stage of diversion silencing cone is gradually increased, and the diameter of the diversion cylinder is matched with the aperture of the opening of the diversion cone and is also gradually increased; the inner surfaces and the outer surfaces of the guide cone and the guide cylinder are respectively paved with sound insulation felts; the positioning support assembly comprises a plurality of support rods and a connecting ring, the support rods are arranged between the support tables of each stage of flow guide silencing cone, the lower ends of the support rods below the support table of the final stage of flow guide silencing cone are fixed with the upper end surface of the connecting ring, and the connecting ring is connected with the upper end surface of the connecting flange; the protective cover is of a cylindrical structure with an opening at the lower end, a plurality of vent holes are uniformly formed in the protective cover, the protective cover covers the multistage flow guide noise elimination cone, and the lower end of the protective cover is fixed with the upper end face of the connecting ring; the lower end of the connecting flange is used for being connected with an air inlet of the ventilator.
2. The gas muffling and guiding device for a mining local ventilator of claim 1, wherein: the multistage flow-guiding silencing cone adopts three stages and comprises a superior flow-guiding silencing cone, a middle flow-guiding silencing cone and a final flow-guiding silencing cone, a guide cylinder suspension of the superior flow-guiding silencing cone is positioned in the guide cone of the middle flow-guiding silencing cone, a guide cylinder suspension of the middle flow-guiding silencing cone is positioned in the guide cone of the final flow-guiding silencing cone, and the lower end of the guide cylinder of the final flow-guiding silencing cone is positioned above the connecting ring.
3. The gas muffling and guiding device for a mining local ventilator of claim 2, wherein: the upper-stage flow guide silencing cone, the middle-stage flow guide silencing cone and the final-stage flow guide silencing cone are all made of metal plates or are made of rubber or plastic through shaping.
4. The gas muffling and guiding device for a mining local ventilator of claim 3, wherein: the protective cover comprises a main cover cylinder, a transition ring and a connecting cylinder and is made of a porous plate; the top of the main cover cylinder is in butt welding with a supporting table of a higher-level flow guide noise elimination cone, and the inner side wall of the main cover cylinder is respectively welded and fixed with the outer edge of the supporting table of the third-level flow guide noise elimination cone; the lower edge of the main cover cylinder is welded with the outer circular ring of the transition ring, the inner circular ring of the transition ring is welded with the upper edge of the connection cylinder, and the lower edge of the connection cylinder is fixed with the upper end face of the connection ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214481.1A CN111156202A (en) | 2020-03-24 | 2020-03-24 | Mining is for local fan gas elimination guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214481.1A CN111156202A (en) | 2020-03-24 | 2020-03-24 | Mining is for local fan gas elimination guiding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111156202A true CN111156202A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010214481.1A Pending CN111156202A (en) | 2020-03-24 | 2020-03-24 | Mining is for local fan gas elimination guiding device |
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| CN (1) | CN111156202A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484289A (en) * | 2020-11-20 | 2021-03-12 | 珠海格力电器股份有限公司 | Noise reduction device, fresh air fan and noise reduction method |
-
2020
- 2020-03-24 CN CN202010214481.1A patent/CN111156202A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484289A (en) * | 2020-11-20 | 2021-03-12 | 珠海格力电器股份有限公司 | Noise reduction device, fresh air fan and noise reduction method |
| CN112484289B (en) * | 2020-11-20 | 2021-11-30 | 珠海格力电器股份有限公司 | Noise reduction device, fresh air fan and noise reduction method |
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