CN113898022A - Construction is with pressing down dirt earthwork excavating gear - Google Patents
Construction is with pressing down dirt earthwork excavating gear Download PDFInfo
- Publication number
- CN113898022A CN113898022A CN202111196856.7A CN202111196856A CN113898022A CN 113898022 A CN113898022 A CN 113898022A CN 202111196856 A CN202111196856 A CN 202111196856A CN 113898022 A CN113898022 A CN 113898022A
- Authority
- CN
- China
- Prior art keywords
- excavator
- water
- engine
- arm
- heat pipe
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The utility model provides a construction is with pressing down dirt earthwork excavating gear relates to engineering construction environmental protection equipment field, includes following step: the water-mist-type water-mist-spraying system comprises an excavator, an atomizing mechanism and a conveying mechanism, wherein the atomizing mechanism comprises a water tank, a heat pipe and a fan, one end of the heat pipe is communicated with the water tank, the other end of the heat pipe is communicated with an atomizing box after being wound around an engine of the excavator, the heat pipe is used for acquiring heat from the engine, the conveying mechanism comprises a conveying pipe and a spray head, one end of the conveying pipe is connected with the atomizing box through the fan to acquire water mist, the other end of the conveying pipe extends along an excavating arm of the excavator to be communicated with the spray head, and the spray head is arranged at the tail end of the excavating arm of the excavator in a surrounding mode and used for outputting the water mist to form a water curtain covering an excavating area; with spraying apparatus direct mount on the excavator, follow the excavator and remove, thereby obtain the heat from the excavator engine as engine auxiliary cooling system and atomize the water, carry to excavator digging arm terminal position, carry out the accuracy and press down the dirt, guarantee the raise dust suppression of job site, effective water economy resource.
Description
Technical Field
The utility model relates to an engineering construction environmental protection equipment field, concretely relates to construction is with pressing down dirt earthwork excavating gear.
Background
On the construction site, a large amount of earthwork excavation, transportation and landfill work can be carried out in the earthwork construction process, and for a relatively dry area, a large amount of dust can be generated in the process, the construction site and the surrounding environment are affected, and the environmental protection requirement is difficult to meet.
At present, modes such as fog guns, dust fall curtains and the like are mostly adopted for dust suppression in the earthwork construction process, the coverage range of the fog guns is limited, the fog guns are difficult to move along with an excavator in real time in the large-area earthwork construction process, the following fog guns are arranged on all excavators, the interference on the excavator operation is easy to generate, and the excavator is inconvenient to freely construct; on the other hand, because the working range of the excavator is uncertain, the position of the fog gun is required to be adjusted at any time according to the working range of the excavator, and the position of the follow-up fog gun is required to be adjusted manually, so that the occupation of human resources is increased, and the safety risk in the construction process is increased; if a large-range fog gun is adopted, the working range of the excavator within a certain time period is covered, water resource waste can be caused by large-range water mist spraying, and the environmental protection requirement can not be met.
Disclosure of Invention
The utility model aims at the defect that prior art exists, provide a construction is with pressing down dirt earthwork excavating gear, with spraying apparatus direct mount on the excavator, follow the excavator and remove, thereby obtain the heat from the excavator engine as engine auxiliary cooling system and atomize the water, carry to excavator digging arm terminal position, carry out the accuracy and press down dirt, guarantee the raise dust suppression of job site, effective water economy resource.
In order to realize the purpose, the following technical scheme is adopted:
the utility model provides a construction is with pressing down dirt earthwork excavating gear, including the excavator, atomizing mechanism and conveying mechanism, atomizing mechanism includes the water tank, heat pipe and fan, heat pipe one end intercommunication water tank, the other end coils the intercommunication behind the excavator engine and has the atomizing case, the heat pipe is used for obtaining the heat from the engine, conveying mechanism includes the conveyer pipe, the shower nozzle, the atomizing case is connected through the fan to conveyer pipe one end, in order to acquire water smoke, the other end extends the intercommunication shower nozzle along the excavator digging arm, the shower nozzle encircles and arranges at excavator digging arm end, a water curtain for outputting water smoke formation cage digs the region.
Furthermore, the four nozzles are respectively arranged corresponding to the four moving directions of the excavating arm, the output ports of the nozzles are arc-shaped, and the four nozzle output ports are spliced to form an annular port surrounding the excavating arm to output an annular water curtain.
Furthermore, the delivery pipes are respectively communicated with the spray heads through corresponding branch pipes, and each branch pipe is matched with a valve; the excavator arm is provided with a gyroscope for acquiring the information of the moving direction of the excavator arm, the gyroscope and the valve are respectively connected with the controller, and the controller is used for controlling the valve corresponding to the upstream nozzle in the moving direction of the excavator arm to be closed.
Furthermore, the atomization box is connected with a heat pipe between the engine and the water tank through a circulating pipe so as to circularly heat the water body in the atomization box.
Further, the atomization box is mounted on the engine housing and vibrates together with the engine housing.
Furthermore, an angle adjusting mechanism is arranged on the spray head, and the included angle between the spray head and the excavating arm can be changed so as to change the range and/or the shape of a water curtain formed by the output water mist.
Further, the water tank is mounted on the body above the excavator rotary platform, and the delivery pipe extends from the excavator body to the spray head at the tail end along the excavating arm.
Furthermore, a heat pipe network is arranged on the heat pipe and serves as a cylinder sleeve cooling pipe of the engine so as to obtain heat from the engine to heat the water body inside.
Further, the heat pipe network also covers the exhaust pipe position of the engine.
Further, the water tank is sleeved outside an exhaust silencer of the engine and used for preheating the water tank through tail gas.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) with spraying apparatus direct mount on the excavator, follow the excavator and remove, thereby obtain the heat from the excavator engine as engine auxiliary cooling system and atomize the water, carry to excavator digging arm terminal position, carry out the accuracy and press down the dirt, guarantee the raise dust suppression of job site, effective water economy resource.
(2) By utilizing the power source of the excavator, the installation of atomizing equipment is reduced while water mist output is obtained, the weight burden of the excavator body is reduced, and the mobility of the excavator in the moving process is improved.
(3) The water body is heated by adopting the heat of the engine to generate water mist, the fan drives the mist to be output, the heat pipe network is formed by the heat pipes to obtain heat from each position of the engine, and the heat acquisition is effectively improved, so that the atomization efficiency and the atomization amount of the water body are improved, and the sufficient supply of the output mist is ensured; the water tank is arranged at the position of the exhaust silencing pipe, and the water body in the water tank is preheated by utilizing the exhaust emission, so that the atomization efficiency is further improved.
(4) Atomizing case, heat pipe form the circulation heating structure, improve the heating efficiency to the water, and the atomizing case is connected and is acquireed the vibration effect on engine housing, avoids adhering to of impurity in the water in the atomizing case under the high-frequency vibration effect, avoids the attached jam of impurity at the pipeline.
(5) The annular sprays the structure and can form water curtain parcel isolation excavation region, compares in traditional fog gun structure can accurate coverage operation scope, improves and presses down dirt, dust proof effect to can guarantee the make full use of to water smoke, reduce water wasting of resources.
(6) The nozzle output encircles and arranges in digging arm end position, and fog supply structure arranges in host computer position of excavator, supplies water smoke, the front output water smoke from the rear, reduces the structure volume in front to reduce the sheltering from to the operating personnel field of vision, conveniently operate.
(7) The device is provided with an acceleration sensor for measuring the moving direction of the excavating arm, the water mist supply of the upstream area of the moving direction of the mechanical arm is closed, the water mist supply of the downstream and the rear of the moving direction is increased, and the increased water mist supply is utilized for accurately suppressing dust aiming at the problem that rear dust is obviously raised in the moving process of the excavating arm.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic view of an overall structure of an excavating device in embodiment 1 of the present disclosure.
In the figure: 1. excavator, 2, engine, 3, water tank, 4, exhaust muffler, 5, blast pipe, 6, heat pipe, 7, circulating pipe, 8, atomizing case, 9, conveyer pipe, 10, digging arm, 11, shower nozzle, 12, water curtain.
Detailed Description
In an exemplary embodiment of the present disclosure, a dust suppression earthwork excavation apparatus for building construction is provided, as shown in fig. 1.
Example 1
Aiming at the problem that the existing mode that a fog gun vehicle moves along with an excavator is not suitable for large-scale earthwork construction and can not solve the dust raising problem, the dust suppression system capable of being installed on excavating equipment is provided, the atomization of a water body is realized by utilizing the energy of the excavator, and water mist is output to an excavating area in a targeted manner, so that the dust raising is effectively reduced, and the requirements of dust suppression and environmental protection are met.
Specifically, as shown in fig. 1, the dust suppression earthwork excavation device for building construction comprises an excavator 1, an atomizing mechanism and a conveying mechanism, wherein the excavator 1 serves as a main bearing structure and provides mounting and fixing positions for the atomizing mechanism and the conveying mechanism; and the device is also used as earth excavation equipment to perform earth excavation, transportation and other work on a construction area.
The atomizing mechanism is arranged on the excavator 1, and generates water mist by heating water in the water tank 3 and conveys the water mist to an excavation area; compared with a mode that water mist is output through a nozzle by pumping water through a high-pressure pump, the energy of the excavator 1 can be fully utilized by generating the water mist through a heating mode, the engine 2 can be cooled, the heat of the engine 2 can be utilized for atomization, the atomization is supplied for dust suppression, the arrangement of the high-pressure pump and the fine nozzle is reduced, and the weight of the whole equipment is reduced.
It should be noted that, by using the power source of the excavator 1 itself, the installation of the atomizing equipment is reduced while the water mist is output, the weight burden of the excavator 1 body is reduced, and the mobility of the excavator 1 in the moving process is improved.
In addition, because the earth working environment is severe, and the output end of the atomization structure is close to the direct excavation position in the embodiment, the nozzle is easy to block due to the adoption of the combined structure of the high-pressure pump and the nozzle, and the requirement on water quality is high, so that the atomization device is not convenient to apply in the severe working environment.
The conveying mechanism obtains water mist from the atomizing mechanism and conveys the water mist to the front end of the excavating arm 10 of the excavator 1, water mist dust fall is carried out on an operation position, a water curtain 12 is formed after the water mist is configured and output, an operation range is shielded, and a dust suppression effect is achieved.
Specifically, as shown in fig. 1, the atomizing mechanism comprises a water tank 3, a heat pipe 6 and a fan, wherein one end of the heat pipe 6 is communicated with the water tank 3, the other end of the heat pipe is communicated with an atomizing tank 8 after being coiled around an engine 2 of the excavator 1, and the heat pipe 6 can obtain heat from the engine 2.
The heat pipe 6 is used as an auxiliary cooling system of the engine 2, obtains heat from the engine 2 of the excavator 1, atomizes water, achieves local acquisition of atomized energy, and reduces use of external energy.
Further, in order to improve the heat absorption effect of the heat pipe 6 and improve the atomization effect, the atomization tank 8 is connected with the heat pipe 6 between the engine 2 and the water tank 3 through a circulating pipe 7 so as to circularly heat the water body in the atomization tank 8.
It should be noted that the heat pipe 6 is provided with a heat pipe network, and the heat pipe network is used as a cylinder liner cooling pipe of the engine 2 to obtain heat from the engine 2 to heat the water inside; the heat pipe network still covers 5 positions at the blast pipe of engine 2, obtains the heat from high temperature tail gas, further improves the temperature of the water in the atomizer box 8 to effectively improve the degree of atomization, guarantee the abundant supply to low reaches water smoke.
Further, the water tank 3 is sleeved outside the exhaust muffler 4 of the engine 2, and is used for preheating the water tank 3 through the tail gas.
The water body is heated by adopting the heat of the engine 2 to generate water mist, the fan drives the mist to output, the heat pipe 6 forms a heat pipe network to obtain heat from each position of the engine 2, and the heat acquisition is effectively improved, so that the atomization efficiency and the atomization amount of the water body are improved, and the sufficient supply of the output water mist is ensured;
the water tank 3 is arranged at the position of the exhaust silencer 4, and the water in the water tank 3 is preheated by utilizing the exhaust emission, so that the atomization efficiency is further improved.
As for the atomization box 8, it is mounted on the engine 2 shell, and vibrates together with the engine 2 shell; a circulating heating structure is formed between the atomization box 8 and the heat pipe 6, so that the heating efficiency of the water body is improved; the atomization box 8 is connected on the shell of the engine 2 to obtain vibration, and the attachment of impurities in the water body in the atomization box 8 is avoided under the action of high-frequency vibration, so that the attachment and blockage of the impurities in the pipeline are avoided.
Conveying mechanism includes conveyer pipe 9, shower nozzle 11, and conveyer pipe 9 one end is passed through the fan and is connected atomizing case 8 to acquire water smoke, the other end along 1 digging arm 10 of excavator extend intercommunication shower nozzle 11, shower nozzle 11 encircles and arranges at 1 digging arm 10 of excavator terminal for output water smoke forms the water curtain 12 of cage cover excavation region.
In this embodiment, four nozzles 11 are provided, the four nozzles 11 are respectively arranged corresponding to four moving directions of the excavating arm 10, the outlets of the nozzles 11 are arc-shaped, and the outlets of the four nozzles 11 are spliced to form an annular opening surrounding the excavating arm 10 to output an annular water curtain 12.
With spraying apparatus direct mount on excavator 1, follow excavator 1 and remove, carry out the atomizing back to the water, carry to excavator 1 digging arm 10 end position, carry out the accurate dust suppression, guarantee the raise dust suppression of job site, effective water economy resource.
Through arranging the shower nozzle 11 at excavator 1 digging arm 10 end, the annular sprays the structure and can form water curtain 12 parcel and keep apart the excavation region, compares in traditional fog gun structure can accurate coverage operation scope, improves and presses down dirt, dust proof effect to can guarantee the make full use of to water smoke, reduce water wasting of resources.
The angle adjusting mechanism is arranged on the spray head 11, and can change the included angle between the spray head 11 and the digging arm 10 so as to change the range and/or the shape of the water curtain 12 formed by the output water mist.
The nozzle output surrounds and arranges in digging arm 10 terminal position, and fog supply structure arranges in excavator 1 host computer position, supplies water smoke, the front output water smoke from the rear, reduces the structure volume in front to reduce the sheltering from to the operating personnel field of vision, conveniently operate.
When the engine 2 initially runs or runs at low power, the atomizing effect of the atomizing mechanism on water is poor due to the fact that the overall temperature of the engine 2 is low, and when the mechanical arm moves, a dust raising area is difficult to completely cover, aiming at the problem, the conveying pipe 9 is respectively communicated with the spray nozzles 11 through the corresponding branch pipes, and each branch pipe is matched with a valve; the excavating arm 10 is provided with a gyroscope for acquiring information of the moving direction of the excavating arm 10, the gyroscope and the valve are respectively connected with a controller, and the controller is used for controlling the valve corresponding to the upstream nozzle 11 positioned in the moving direction of the excavating arm 10 to be closed.
When the device is used, because the rear dust raising amount in the moving direction in the earth excavation and transportation process is large, the acceleration sensor is arranged to measure the moving direction of the excavating arm 10, the water mist supply in the upstream area of the moving direction of the mechanical arm is closed, the rear mist supply in the downstream of the moving direction is increased, and the increased mist supply is utilized to accurately suppress dust aiming at the problem that the rear dust raising amount in the moving process of the excavating arm 10 is obvious.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides a construction is with pressing down dirt earthwork excavating gear, a serial communication port, including the excavator, atomizing mechanism and conveying mechanism, atomizing mechanism includes the water tank, heat pipe and fan, heat pipe one end intercommunication water tank, the other end coils the intercommunication behind the excavator engine and has the atomizer, conveying mechanism includes the conveyer pipe, the shower nozzle, the atomizer is connected through the fan to conveyer pipe one end, the other end extends the intercommunication shower nozzle along the excavator digging arm, the shower nozzle encircles and arranges at excavator digging arm end for output water smoke forms the regional water curtain of cage excavation.
2. A dust suppression earthwork excavation apparatus according to claim 1, wherein four nozzles are arranged corresponding to four moving directions of the excavation arm, respectively, the outlets of the nozzles are arc-shaped, and the outlets of the four nozzles are joined together to form an annular opening surrounding the excavation arm to output an annular water curtain.
3. A dust suppressing earthwork excavation apparatus as claimed in claim 2, wherein the delivery pipe is communicated with the nozzles through corresponding branch pipes, respectively, each of which is fitted with a valve; the excavator arm is provided with a gyroscope for acquiring the information of the moving direction of the excavator arm, the gyroscope and the valve are respectively connected with the controller, and the controller is used for controlling the valve corresponding to the upstream nozzle in the moving direction of the excavator arm to be closed.
4. A dust suppressing earthwork apparatus as claimed in claim 1 wherein the atomizing tank is connected to a heat pipe between an engine and a water tank through a circulation pipe for circulation heating of a water body in the atomizing tank.
5. A dust suppressing earthwork apparatus as recited in claim 4 wherein said atomizing chamber is mounted on the engine housing for co-vibration therewith.
6. A dust suppressing earthwork excavation apparatus as claimed in claim 1, wherein the nozzle is provided with an angle adjusting mechanism capable of changing an angle between the nozzle and the excavating arm to change a range and/or a shape of a water curtain formed by the output water mist.
7. A dust suppressing earthwork excavation apparatus as claimed in claim 1 wherein the water tank is mounted on a body above a revolving platform of the excavator, and the delivery pipe extends from the excavator body to a spray head at a distal end along the excavating arm.
8. A dust suppressing earthwork excavation apparatus as claimed in claim 1, wherein a heat pipe network is provided on the heat pipe, the heat pipe network being a cylinder liner cooling pipe of the engine to take heat from the engine to heat the water body inside.
9. A dust suppressing earthwork excavation apparatus for construction according to claim 8, wherein the heat pipe network further covers an exhaust pipe position of an engine.
10. A dust suppressing earthwork excavation apparatus according to claim 1, wherein the water tank is fitted around an outside of an exhaust muffler of the engine for preheating the water tank by the exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196856.7A CN113898022A (en) | 2021-10-14 | 2021-10-14 | Construction is with pressing down dirt earthwork excavating gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196856.7A CN113898022A (en) | 2021-10-14 | 2021-10-14 | Construction is with pressing down dirt earthwork excavating gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113898022A true CN113898022A (en) | 2022-01-07 |
Family
ID=79192025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111196856.7A Pending CN113898022A (en) | 2021-10-14 | 2021-10-14 | Construction is with pressing down dirt earthwork excavating gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113898022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115193192A (en) * | 2022-07-25 | 2022-10-18 | 西安西热锅炉环保工程有限公司 | High-pressure dry fog dust removal device for grab bucket of port crane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0718880A (en) * | 1993-06-28 | 1995-01-20 | Kenkoo:Kk | Method for demolishing building and sprinkler used in demolishing |
| CN208010389U (en) * | 2018-02-11 | 2018-10-26 | 张家口市宣化金科钻孔机械有限公司 | Water mist dust-removing system |
| CN212052962U (en) * | 2020-05-07 | 2020-12-01 | 中冶建工集团有限公司 | Dust falling device for excavator |
| CN213062144U (en) * | 2020-07-29 | 2021-04-27 | 济南御风秋韵环保工程有限公司 | High-pressure water mist dust suppression device mounted on excavator |
-
2021
- 2021-10-14 CN CN202111196856.7A patent/CN113898022A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0718880A (en) * | 1993-06-28 | 1995-01-20 | Kenkoo:Kk | Method for demolishing building and sprinkler used in demolishing |
| CN208010389U (en) * | 2018-02-11 | 2018-10-26 | 张家口市宣化金科钻孔机械有限公司 | Water mist dust-removing system |
| CN212052962U (en) * | 2020-05-07 | 2020-12-01 | 中冶建工集团有限公司 | Dust falling device for excavator |
| CN213062144U (en) * | 2020-07-29 | 2021-04-27 | 济南御风秋韵环保工程有限公司 | High-pressure water mist dust suppression device mounted on excavator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115193192A (en) * | 2022-07-25 | 2022-10-18 | 西安西热锅炉环保工程有限公司 | High-pressure dry fog dust removal device for grab bucket of port crane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210289931U (en) | System for providing mobile power | |
| CN113898022A (en) | Construction is with pressing down dirt earthwork excavating gear | |
| CN105780706A (en) | Spray dust-removal haze-removal vehicle with vector nozzle | |
| CN103786628B (en) | Moving multi-stage hydrostatic drive air-assisted spraying reducing dust lowering car | |
| FI1947933T4 (en) | System for controlled application of herbicides | |
| RU2009116284A (en) | REMOVABLE COMPOSITION OF THE AIR INTAKE FOR THE TURBOJET ENGINE GONDOLA | |
| CN206837290U (en) | A kind of unmanned plane fire control platform | |
| CN105728225A (en) | Atomizing, dust removing and haze removing vehicle controlled by PLC and provided with vector spraying port | |
| CN216022851U (en) | Fire monitor with multi-injection effect | |
| CN108014437A (en) | A kind of multifunction remote-control metro fire-fighting robot and its control method | |
| CN104338401A (en) | Construction site spraying dust reduction device | |
| CN201454741U (en) | Self-powered long-range mist sprayer | |
| CN103953461B (en) | A kind of mechanical valve that reduces air inlet of air-breathing pulse detonation engine back-pressure | |
| CN108361030B (en) | A kind of development machine annular package dust-arrest device | |
| CN214985047U (en) | Multifunctional dust suppression vehicle | |
| CN213062144U (en) | High-pressure water mist dust suppression device mounted on excavator | |
| CN108499767A (en) | Collect single water pump driving water route and its dust suppression vehicle of high-pressure wash and dust suppression spraying | |
| CN107654254A (en) | A kind of mining geomantic omen matching focus type dust-arrest device | |
| CN208715061U (en) | A kind of multipurpose epidemic prerention vehicle | |
| CN202991045U (en) | Dry fog dust suppression system for downhole heading machine | |
| CN210522110U (en) | Energy-saving type mist sprayer | |
| CN211274003U (en) | Movable wet dust-removing working device | |
| CN209763058U (en) | Unmanned aerial vehicle carries formula electric wire netting obstacles removing flame projecting device | |
| CN207614554U (en) | A kind of spraying device | |
| CN208416599U (en) | Portable multi-function device for eliminating smoke and dust in a kind of hole |
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 |