CN114777253A - Ventilation system for underground powerhouse of hydropower station - Google Patents
Ventilation system for underground powerhouse of hydropower station Download PDFInfo
- Publication number
- CN114777253A CN114777253A CN202210427758.8A CN202210427758A CN114777253A CN 114777253 A CN114777253 A CN 114777253A CN 202210427758 A CN202210427758 A CN 202210427758A CN 114777253 A CN114777253 A CN 114777253A
- Authority
- CN
- China
- Prior art keywords
- filter screen
- mounting
- pipe body
- hydropower station
- sliding
- 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.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/90—Cleaning of purification apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/22—Cleaning ducts or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a ventilation system of an underground powerhouse of a hydropower station, which comprises: the filter screen is arranged in the pipe body; clear subassembly of netting, clear subassembly of netting be used for with filter screen surface adnexed debris are cleared up, clear subassembly of netting is including establishing first mounting panel, fixed mounting in the pipe body the installation pole at the first mounting panel back, fixed cup joint flabellum and many on the installation pole scrape the strip, flabellum back fixed mounting has many connecting rods, many scrape the strip respectively with many the connecting rod is kept away from the one end fixed connection of flabellum, and the surface with the surface counterbalance of filter screen. According to the invention, through the matching between the fan blades and the scraping strips, when outside air enters the pipe body at a high speed, the fan blades can drive the scraping strips to rotate, and the scraping strips are abutted against the surface of the filter screen, so that the effect of cleaning sundries attached to the surface of the filter screen can be achieved during rotation, and an additional power system is not needed.
Description
Technical Field
The invention relates to the technical field of hydraulic and hydroelectric engineering, in particular to a ventilation system of an underground powerhouse of a hydropower station.
Background
In the design of arranging ventilation systems of the underground powerhouse of the hydropower station, the ventilation requirements of the underground powerhouse are met, the requirements of construction, installation, operation, maintenance and the like of an air conditioning unit in an air conditioning machine room are considered under the condition that the air conditioning machine room is arranged, and a special air inlet and exhaust channel is arranged on a suspended ceiling of the underground main powerhouse under the common condition, so that the air inlet and exhaust are smooth for coordinating the arrangement of a cavern.
The filter screen is arranged in the air inlet channel in order to avoid that some external impurities enter the air inlet channel in the air inlet process, a plurality of impurities are attached to the surface of the filter screen in the long-time use process, and the filter holes of the filter screen are blocked by the impurities, so that air entering the pipeline cannot pass through the filter screen.
Disclosure of Invention
The invention aims to solve the following defects in the prior art, and provides a ventilation system of an underground powerhouse of a hydropower station, wherein a filter screen is arranged in an air inlet channel in the prior art, so that in the air inlet process, in order to avoid that some external impurities enter the air inlet channel, a plurality of impurities are attached to the surface of the filter screen in the long-time use process of the filter screen, and the impurities can block filter holes of the filter screen, so that air entering the channel cannot pass through the filter screen.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydropower station underground powerhouse ventilation system, comprising:
the filter screen is arranged in the pipe body;
clear subassembly of netting, clear subassembly of netting be used for with filter screen surface adnexed debris are cleared up, clear subassembly of netting is including establishing first mounting panel, fixed mounting in the pipe body the installation pole at the first mounting panel back, fixed cup joint flabellum and many on the installation pole scrape the strip, flabellum back fixed mounting has many connecting rods, many scrape the strip respectively with many the connecting rod is kept away from the one end fixed connection of flabellum, and the surface with the surface counterbalance of filter screen.
Preferably, first spout has been seted up to body inner wall symmetry level, filter screen lateral wall symmetry fixed mounting has the slider, two slider slidable mounting respectively is two in the first spout, the filter screen passes through spacing subassembly restriction removal.
Preferably, the limiting assembly comprises a second mounting plate fixedly mounted in the pipe body, a mounting rod fixedly mounted on the surface of the second mounting plate, a sliding ring sleeved on the mounting rod in a sliding manner, two breathable nets and two limiting rods, the fixing rods are vertically and symmetrically fixedly mounted in the pipe body, a first mounting seat is fixedly sleeved on each fixing rod, the second mounting seats are symmetrically and fixedly mounted on the side walls of the sliding ring, two sides of the two breathable nets are rotatably connected with the two first mounting seats and the two second mounting seats respectively, the two limiting rods are fixedly mounted on the surfaces of the two breathable nets respectively, one end, far away from the breathable nets, abuts against the back faces of the filter screens, and the sliding ring resets through a telescopic component.
Preferably, the telescopic component comprises a first spring sleeved on the mounting rod, and two ends of the first spring are fixedly connected with the back surface of the slip ring and the surface of the second mounting plate respectively.
Preferably, the surface of the filter screen is provided with an annular groove, a magnetic ring is slidably mounted in the annular groove, and one surface of the scraping strip, which is close to the magnetic ring, is made of a magnetic material.
Preferably, the fan blades are fixedly mounted on the mounting rod through screw and nut fasteners.
Preferably, the inner tube wall of the tube body is symmetrically and horizontally provided with second sliding grooves, and the first mounting plate is slidably mounted in the two second sliding grooves through a connecting part.
Preferably, the connecting part comprises two sliding rods which are respectively and fixedly installed in the two second sliding grooves in a horizontal mode and two second springs which are respectively sleeved on the two sliding rods, the first mounting plate is sleeved on the two sliding rods in a sliding mode, and two ends of each second spring are respectively and fixedly connected with the back face of the first mounting plate and the groove wall of the second sliding groove.
Compared with the prior art, the invention has the beneficial effects that:
1. through the matching between the fan blades and the scraping strips, when outside air enters the pipe body at a high speed, the fan blades can drive the scraping strips to rotate, and the scraping strips are abutted against the surface of the filter screen, so that the effect of cleaning sundries attached to the surface of the filter screen can be achieved during rotation, and an additional power system is not needed;
2. through the cooperation between spacing subassembly and the extensible part, when filter screen surface adnexed impurity is more, the filter screen can not take place to remove, when filter screen surface adnexed impurity is less, the filter screen can take place to remove backward, just that is only when filter screen surface adnexed impurity is more, many scrape the strip just can offset with filter screen surface, when filter screen surface adnexed impurity is less, it can not offset with filter screen surface to scrape the strip, thereby can avoid many to scrape the strip and offset with the surface of filter screen always, and then can reduce the loss of scraping the strip, thereby increase the life who scrapes the strip.
Drawings
FIG. 1 is a schematic front perspective view of a ventilation system of an underground powerhouse of a hydropower station according to the present invention;
FIG. 2 is a schematic diagram of a back side perspective structure of a ventilation system of an underground powerhouse of a hydropower station according to the present invention;
FIG. 3 is a schematic top sectional view of a ventilation system of an underground powerhouse of a hydropower station according to the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1;
fig. 5 is an enlarged schematic view of B in fig. 2.
In the figure: the device comprises a pipe body 1, a filter screen 2, a first mounting plate 3, a mounting rod 4, fan blades 5, a scraping strip 6, a connecting rod 7, a first sliding groove 8, a sliding block 9, a second mounting plate 10, a mounting rod 11, a sliding ring 12, a ventilation net 13, a fixed rod 14, a first mounting seat 15, a second mounting seat 16, a first spring 17, an annular groove 18, a magnetic ring 19, a second sliding groove 20, a sliding rod 21, a second spring 22 and a limiting rod 23.
Detailed Description
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.
Referring to fig. 1-5, a hydropower station underground powerhouse ventilation system includes:
the filter screen device comprises a pipe body 1, wherein a filter screen 2 is arranged in the pipe body 1;
clear subassembly of netting, clear subassembly of netting is used for clearing up 2 adnexed debris in surface of filter screen, clear subassembly of netting is including establishing first mounting panel 3 in body 1, fixed mounting is at the installation pole 4 at the 3 backs of first mounting panel, fixed the flabellum 5 and the many strips 6 of scraping of cup jointing on installation pole 4, 5 back fixed mounting of flabellum have many connecting rods 7, many strips 6 of scraping keep away from the one end fixed connection of flabellum 5 with many connecting rods 7 respectively, and the surface offsets with the surface of filter screen 2.
In the embodiment of using technical scheme, through flabellum 5 and the cooperation between many scrapes strip 6, when external air gets into in body 1 with high speed, flabellum 5 can take many scrapes strip 6 and rotate, because many scrapes strip 6 and filter screen 2's surface offsets, thereby can reach the effect of clearing up filter screen 2 surface adnexed debris in the pivoted, and need not extra driving system, avoid filter screen 2 to block up because of long-time not clearing up, lead to getting into the unable filter screen 2 that passes through of air in the body 1.
According to the preferred technical scheme in the embodiment, the limiting assembly comprises a second mounting plate 10 fixedly mounted in the tube body 1, a mounting rod 11 fixedly mounted on the surface of the second mounting plate 10, a sliding ring 12 sleeved on the mounting rod 11 in a sliding manner, two breathable nets 13 and two limiting rods 23, fixing rods 14 are vertically and symmetrically fixedly mounted in the tube body 1, a first mounting seat 15 is fixedly sleeved on each fixing rod 14, a second mounting seat 16 is symmetrically and fixedly mounted on the side wall of the sliding ring 12, two sides of each breathable net 13 are rotatably connected with the two first mounting seats 15 and the two second mounting seats 16 respectively, the two limiting rods 23 are fixedly mounted on the surfaces of the two breathable nets 13 respectively, one end far away from the breathable net 13 is abutted to the back of the filter screen 2, and the sliding ring 12 is reset through a telescopic component. When the impurities on the surface of the filter screen 2 are more, the acting force acting on the surfaces of the two breathable nets 13 through the filter screen 2 is very small, the breathable nets 13 cannot deform, the sliding ring 12 cannot move towards the direction far away from the filter screen 2 on the arrangement rod 11, so that the two limiting rods 23 always abut against the back surfaces of the filter screen 2 at the moment, the filter screen 2 cannot move due to the thrust of air, the rotating scraping strips 6 always abut against the surfaces of the filter screen 2, the cleaning work on the filter screen 2 is further realized, when the impurities on the surface of the filter screen 2 are less, the acting force acting on the surfaces of the two breathable nets 13 through the filter screen 2 is larger, the breathable nets 13 deform, the sliding ring 12 also moves towards the direction far away from the filter screen 2 on the arrangement rod 11, and the two limiting rods 23 rotate at the moment and do not abut against the back surfaces of the filter screen 2 any more, the filter screen 2 receives the thrust of air and can take place to remove, and many scrapes strip 6 in the rotation just can not offset with the surface of filter screen 2 like this to can avoid many to scrape strip 6 and offset with the surface of filter screen 2 always, and then can reduce the loss of scraping strip 6, thereby increase the life of scraping strip 6.
In the preferred technical solution in this embodiment, the telescopic component includes a first spring 17 sleeved on the mounting rod 11, and two ends of the first spring 17 are respectively fixedly connected to the back surface of the slip ring 12 and the surface of the second mounting plate 10. When high-speed air lets in the body 1, two ventilative nets 13 receive the thrust of air and can take place deformation this moment to sliding ring 12 also can take place to remove on settling the pole 11, and first spring 17 just can contract, when no longer letting in the air in the body 1, sliding ring 12 can reset rapidly under the elastic potential energy of first spring 17 this moment.
In the preferred technical scheme in this embodiment, the surface of the filter screen 2 is provided with an annular groove 18, a magnetic ring 19 is slidably mounted in the annular groove 18, and one surface of the scraping strip 6 close to the magnetic ring 19 is made of a magnetic material. The magnetic ring 19 can slide in the annular groove 18, when the rotating scraping strips 6 abut against the surface of the filter screen 2, the scraping strips 6 can contact and adsorb the surface of the magnetic ring 19, even if the impurities attached to the surface of the filter screen 2 are reduced in the process of sliding and cleaning the surface of the filter screen 2 by the scraping strips 6, the wind force acting on the two breathable nets 13 through the filter screen 2 is increased, the slip ring 12 has a trend of moving towards the direction away from the filter screen 2, but because the magnetic force absorbed between the magnetic ring 19 and the scraping strips 6 can counteract a part of the suddenly increased wind pressure, the slip ring 12 cannot move, the filter screen 2 cannot move at this time, so that the scraping strips 6 still abut against the surface of the filter screen 2 at this time, and after the impurities on the surface of the filter screen 2 are partially cleaned, the wind pressure through the filter screen 2 is increased, the limitation to the filter screen 2 can be removed, filter screen 2 just can take place to remove and no longer offsets with many scraping strip 6, only when scraping strip 6 to filter screen 2 surface impurity clearance's fast almost the time, reach the certain degree through filter screen 2 effect wind-force on two ventilative nets 13 this moment, the wind pressure that produces ventilative net 13 surface this moment just is enough to offset magnetic ring 19 and scrape absorbent magnetic force between the strip 6, thereby the sliding ring 12 just can hucho and keep away from the direction removal of filter screen 2, and then relieve the spacing effect to filter screen 2, filter screen 2 just can take place to remove at this moment and break away from with many scraping strip 6.
In the preferred technical scheme of this embodiment, the fan blade 5 is fixedly mounted on the mounting rod 4 through a screw and nut fixing member. The screw and nut fixing piece facilitates replacement of the scraping strip 6 which is worn seriously by workers.
In the preferred technical solution of this embodiment, the pipe wall of the pipe body 1 is symmetrically and horizontally provided with the second sliding grooves 20, and the first mounting plate 3 is slidably mounted in the two second sliding grooves 20 through the connecting component. The first mounting plate 3 can be moved in the horizontal direction within the two second slide grooves 20 by the connecting member.
In the preferred technical solution in this embodiment, the connecting member includes two sliding rods 21 horizontally and fixedly installed in the two second sliding grooves 20, and two second springs 22 respectively sleeved on the two sliding rods 21, the first mounting plate 3 is slidably sleeved on the two sliding rods 21, and two ends of the second spring 22 are fixedly connected to the back surface of the first mounting plate 3 and the groove walls of the second sliding grooves 20. When the outside air is introduced into the pipe body 1 at a high speed, the first mounting plate 3 drives the fan blades 5 to move towards the direction close to the filter screen 2 by the thrust of the air, and then the two second springs 22 contract, if the impurities attached to the surface of the filter screen 2 are more, the filter screen 2 cannot move, the plurality of scraping strips 6 also abut against the surface of the filter screen 2, if the impurities attached to the surface of the filter screen 2 are less, the filter screen 2 also moves by the thrust of the air, so that the plurality of scraping strips 6 cannot abut against the surface of the filter screen 2 at the moment, the plurality of scraping strips 6 are prevented from abutting against the surface of the filter screen 2 in an initial state, the fan blades 5 are rotated along with the scraping strips 6, the filter screen 2 cannot be separated from the ends abutting against the scraping strips 6 after the end time, and when the air is not introduced into the pipe body 1 any more, under the action of the elastic potential energy of the second springs 22, the two second springs 22 will quickly bring the first mounting plate 3 back.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a power station underground powerhouse ventilation system which characterized in that includes:
the filter screen comprises a pipe body (1), wherein a filter screen (2) is arranged in the pipe body (1);
net clearing assembly, net clearing assembly be used for with filter screen (2) surface adhesion's debris are cleared up, net clearing assembly is including establishing first mounting panel (3), fixed mounting in body (1) are in installation pole (4), the fixed cover at the first mounting panel (3) back are in flabellum (5) on installation pole (4) and many scrape strip (6), flabellum (5) back fixed mounting has many connecting rod (7), many scrape strip (6) respectively with many connecting rod (7) are kept away from the one end fixed connection of flabellum (5), and the surface with the surface of filter screen (2) offsets.
2. The ventilation system of the hydropower station underground powerhouse according to claim 1, wherein first sliding grooves (8) are symmetrically and horizontally formed in the inner wall of the pipe body (1), sliding blocks (9) are symmetrically and fixedly mounted on the side wall of the filter screen (2), the two sliding blocks (9) are respectively slidably mounted in the two first sliding grooves (8), and the filter screen (2) is limited to move through a limiting component.
3. The ventilating system of the hydropower station underground powerhouse according to claim 2, wherein the limiting component comprises a second mounting plate (10) fixedly mounted in the pipe body (1), a mounting rod (11) fixedly mounted on the surface of the second mounting plate (10), a slip ring (12) slidably sleeved on the mounting rod (11), two air-permeable nets (13) and two limiting rods (23), fixing rods (14) are vertically and symmetrically and fixedly mounted in the pipe body (1), a first mounting seat (15) is fixedly sleeved on each fixing rod (14), a second mounting seat (16) is symmetrically and fixedly mounted on the side wall of the slip ring (12), two sides of the two air-permeable nets (13) are respectively and rotatably connected with the two first mounting seats (15) and the two second mounting seats (16), and the two limiting rods (23) are respectively and fixedly mounted on the surfaces of the two air-permeable nets (13), and one end far away from the ventilation net (13) is propped against the back surface of the filter screen (2), and the slip ring (12) is reset through a telescopic component.
4. The ventilating system of the hydropower station underground powerhouse according to claim 3, wherein the telescopic member comprises a first spring (17) sleeved on the mounting rod (11), and two ends of the first spring (17) are fixedly connected with the back surface of the slip ring (12) and the surface of the second mounting plate (10) respectively.
5. The ventilating system of the hydropower station underground powerhouse according to claim 4, wherein the surface of the filter screen (2) is provided with an annular groove (18), a magnetic ring (19) is slidably mounted in the annular groove (18), and one surface of the scraping strip (6) close to the magnetic ring (19) is made of a magnetic material.
6. The ventilation system of the hydropower station underground powerhouse according to claim 1, wherein the fan blades (5) are fixedly mounted on the mounting rod (4) through screw and nut fasteners.
7. The ventilation system for the underground powerhouse of the hydropower station according to claim 1, wherein the pipe body (1) is symmetrically and horizontally provided with second sliding grooves (20) on the inner wall thereof, and the first mounting plate (3) is slidably mounted in the two second sliding grooves (20) through a connecting part.
8. The ventilating system of the hydropower station underground powerhouse according to claim 7, wherein the connecting member comprises two sliding rods (21) respectively horizontally and fixedly installed in the two second sliding grooves (20) and two second springs (22) respectively sleeved on the two sliding rods (21), the first mounting plate (3) is slidably sleeved on the two sliding rods (21), and two ends of the second springs (22) are respectively and fixedly connected with the back surface of the first mounting plate (3) and the groove wall of the second sliding groove (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427758.8A CN114777253A (en) | 2022-04-22 | 2022-04-22 | Ventilation system for underground powerhouse of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427758.8A CN114777253A (en) | 2022-04-22 | 2022-04-22 | Ventilation system for underground powerhouse of hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114777253A true CN114777253A (en) | 2022-07-22 |
Family
ID=82430323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210427758.8A Withdrawn CN114777253A (en) | 2022-04-22 | 2022-04-22 | Ventilation system for underground powerhouse of hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114777253A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116558011A (en) * | 2023-06-16 | 2023-08-08 | 中铁建工集团有限公司 | Mixed ventilation treatment device for industrial factory building and application method of mixed ventilation treatment device |
-
2022
- 2022-04-22 CN CN202210427758.8A patent/CN114777253A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116558011A (en) * | 2023-06-16 | 2023-08-08 | 中铁建工集团有限公司 | Mixed ventilation treatment device for industrial factory building and application method of mixed ventilation treatment device |
| CN116558011B (en) * | 2023-06-16 | 2023-12-22 | 中铁建工集团有限公司 | Mixed ventilation treatment device for industrial factory building and application method of mixed ventilation treatment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114777253A (en) | Ventilation system for underground powerhouse of hydropower station | |
| CN115445334A (en) | Dust remover with self-cleaning function | |
| CN113217069A (en) | Ventilation device for preventing coal mine gas from exceeding limit | |
| CN108114917B (en) | From clean dust collector of type paper production | |
| CN115371171A (en) | Ventilator with self-cleaning function | |
| CN111998488B (en) | Ventilation unit for architectural design | |
| CN212132812U (en) | Ventilation system for multi-storey building | |
| CN212657838U (en) | Novel fan that can be used to fire control and discharge fume device | |
| CN110961385B (en) | Small-size heliostat cleaning equipment | |
| CN214089722U (en) | Hydraulic engineering reposition of redundant personnel is with cutting dirty device | |
| CN210149332U (en) | Novel air conditioner grille air door for train | |
| CN114931792A (en) | Filterable water conservancy pipe | |
| CN211551985U (en) | Air conditioner air pipe capable of effectively preventing blockage | |
| CN215062644U (en) | Based on ventilation unit for electronic information engineering computer lab | |
| CN113198283B (en) | Environment-friendly air purification device | |
| CN219646995U (en) | Dust collector is used in carburant processing | |
| CN219772909U (en) | Dykes and dams flood control drainage structures for hydraulic engineering | |
| CN217841721U (en) | Mine ventilation structure prevent blockking up dust screen | |
| CN221099472U (en) | Adjustable evaporation air cooler | |
| CN219365207U (en) | Green building window outer sunshade equipment | |
| CN220572955U (en) | Air draft impurity removing pipeline | |
| CN221146703U (en) | Energy-saving ventilation structure for building design | |
| CN219876392U (en) | Protective device for thermal control of power plant | |
| CN214513574U (en) | Raise dust intelligent monitoring and treatment device for building engineering | |
| CN216812312U (en) | Axial fan blade ash removal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220722 |