CN112452078A - Atomizer that municipal works were used - Google Patents
Atomizer that municipal works were used Download PDFInfo
- Publication number
- CN112452078A CN112452078A CN202011295396.9A CN202011295396A CN112452078A CN 112452078 A CN112452078 A CN 112452078A CN 202011295396 A CN202011295396 A CN 202011295396A CN 112452078 A CN112452078 A CN 112452078A
- Authority
- CN
- China
- Prior art keywords
- water outlet
- spray pipe
- outlet spray
- telescopic rod
- 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.)
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Classifications
-
- 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
-
- 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
- B01D47/16—Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H3/00—Applying liquids to roads or like surfaces, e.g. for dust control; Stationary flushing devices
- E01H3/04—Fixed devices, e.g. permanently- installed flushing means
Abstract
The invention provides an atomizer for municipal engineering.A fixed seat is fixed in a box body; the first telescopic rod and the second telescopic rod are both rotatably arranged on the fixed seat; the telescopic end of the first telescopic rod is connected with the first water outlet spray pipe in a sliding manner; the telescopic end of the second telescopic rod is connected with the second water outlet spray pipe in a sliding manner; the first water outlet spray pipe is rotationally connected with the box body through a first rotating shaft; the first atomizing nozzle is arranged at the end part of the first water outlet spray pipe, the second atomizing nozzle is arranged at the end part of the second water outlet spray pipe, and a group of opposite side walls of the box body are respectively provided with a first through groove and a second through groove; the water inlet end of the water pump is communicated with the water storage tank through a first pipeline, and the water outlet end of the water pump is communicated with the first water outlet spray pipe through a second pipeline; the water outlet end of the water pump is communicated with the second water outlet spray pipe through a third pipeline. By adopting the atomizer for municipal construction provided by the embodiment of the invention, the atomizer can be arranged according to the construction site.
Description
Technical Field
The invention relates to the technical field of municipal construction, in particular to an atomizer for municipal engineering.
Background
When carrying out municipal works, can produce more raise dust, not only reduce operational environment's quality, also can produce certain influence to all ring edge borders, therefore during municipal works, need use the atomizer for the dust fall.
The prior patent (publication number: CN210674676U) relates to the technical field of municipal construction. This kind of atomizer for civil construction includes the cylinder, the cylinder is the hollow pole of cylinder, cylinder inner chamber middle part welding has the division board, and the division board separates the cylinder inner chamber for arrange the dirt chamber and advance the dirt chamber, and arrange the dirt chamber and be located the rear of advancing the dirt chamber, advance the dirt opening evenly seted up to the antetheca in dirt chamber, the draw-in groove has been seted up to the back wall of cylinder, the top of advancing the dirt opening is provided with the basin, the wall intercommunication has the mouth of pipe of intaking behind the basin, the welding of basin middle part has the dust exhaust pipe, the top welding in dust intake chamber has the dust absorption pipe, the welding of the top end wall of cylinder has the U-shaped grillage, install spacing roller pole in the groove chamber of draw-in groove, the below in dust exhaust chamber and the dust intake chamber is provided with the ponding chamber, and ponding chamber and the dirt chamber is linked together, the back wall intercommunication. In the process of implementing the scheme, the following problems in the prior art are found to be not well solved: when the device is used, the device needs to be uniformly arranged along the periphery of a construction site, the laying is troublesome, and the device is difficult to use in small-scale construction.
Disclosure of Invention
In order to solve the technical problem, the invention provides an atomizer for municipal engineering, which has the following specific technical scheme:
the embodiment of the invention provides an atomizer for municipal engineering, which comprises: the device comprises a box body, a first rotating shaft, a second rotating shaft, a fixed seat, a first telescopic rod, a second telescopic rod, a first atomizing nozzle, a second atomizing nozzle, a first water outlet nozzle, a second water outlet nozzle, a water pump, a water storage tank, a first pipeline, a second pipeline and a third pipeline;
the fixed seat is fixed inside the box body; the first telescopic rod and the second telescopic rod are both rotatably arranged on the fixed seat, and the first water outlet spray pipe and the second water outlet spray pipe are pipelines with two closed ends; the telescopic end of the first telescopic rod is connected with the first water outlet spray pipe in a sliding manner; the telescopic end of the second telescopic rod is connected with the second water outlet spray pipe in a sliding manner; the first water outlet spray pipe is rotationally connected with the box body through the first rotating shaft; the second water outlet spray pipe is rotationally connected with the box body through the second rotating shaft; the first atomization nozzle is arranged at the end part of the first water outlet spray pipe, the second atomization nozzle is arranged at the end part of the second water outlet spray pipe, and a group of opposite side walls of the box body are respectively provided with a first through groove and a second through groove; the water inlet end of the water pump is communicated with the water storage tank through the first pipeline, and the water outlet end of the water pump is communicated with the first water outlet spray pipe through the second pipeline; and the water outlet end of the water pump is communicated with the second water outlet spray pipe through a third pipeline.
Further, the first telescopic rod is connected with the first water outlet spray pipe in a sliding mode through a sliding assembly; the sliding assembly comprises a sliding chute and a sliding block; the sliding block is in limit sliding connection with the sliding groove; the telescopic end of the first telescopic rod is rotatably connected with the sliding block; the sliding groove is fixedly arranged on the side wall of the bottom of the first water outlet spray pipe.
Further, the second telescopic rod is connected with the second water outlet spray pipe in a sliding mode through a sliding assembly; the sliding assembly comprises a sliding chute and a sliding block; the sliding block is in limit sliding connection with the sliding groove; the telescopic end of the second telescopic rod is rotatably connected with the sliding block; the sliding groove is fixedly arranged on the side wall of the bottom of the second water outlet spray pipe.
In the using process, the atomizer for municipal construction is moved to a construction site, then the first telescopic rod and the second telescopic rod are started, the first telescopic rod retracts, and then the first water outlet spray pipe arranged at the telescopic end of the first telescopic rod is driven to rotate by taking the first rotating shaft as the center, at the moment, the first atomizing nozzle arranged at the end part of the first water outlet spray pipe rotates towards the side wall direction of the box body until the first atomizing nozzle penetrates through the side wall of the box body from the first through groove, and the first telescopic rod stops moving; the second telescopic rod retracts to further drive the second water outlet spray pipe arranged at the telescopic end of the second telescopic rod to rotate by taking the second rotating shaft as a center, at the moment, the second atomization spray head arranged at the end part of the second water outlet spray pipe rotates towards the side wall direction of the box body until the second atomization spray head passes through the side wall of the box body from the second through groove, and the second telescopic rod stops moving; then, a water pump is started to work, water stored in a water storage tank is pumped to a first water outlet spray pipe and a second water outlet spray pipe, a plurality of through holes are formed in the side walls of the first water outlet spray pipe and the second water outlet spray pipe, a first atomizing nozzle is correspondingly arranged at each of the plurality of through holes of the first water outlet spray pipe, a second atomizing nozzle is correspondingly arranged at each of the plurality of through holes of the second water outlet spray pipe, water pumped to the water outlet spray pipe by the water pump is sprayed out through the first atomizing nozzle and the second atomizing nozzle, and sprayed atomized water is used for dust fall of a construction site; after the construction is finished, the first telescopic rod and the second telescopic rod are controlled to retract, so that the first atomizing nozzle and the second atomizing nozzle are driven to retract, and the possibility that the atomizing nozzles and the water outlet spray pipe are damaged by external force is reduced; by adopting the atomizer for municipal construction provided by the embodiment of the invention, the atomizer can be arranged according to the construction site.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of an internal structure of an atomizer for municipal engineering according to an embodiment of the present invention.
Fig. 2 is a schematic view of a connection structure of the water outlet nozzle and the atomizing nozzle according to the embodiment of the present invention.
Fig. 3 is a schematic view of a partial connection structure of an atomizer for municipal works according to an embodiment of the present invention.
Reference numerals:
the spray gun comprises a box body 1, a first rotating shaft 2, a second rotating shaft 3, a fixed seat 4, a first telescopic rod 5, a second telescopic rod 6, a first atomizing nozzle 7, a second atomizing nozzle 8, a first water outlet nozzle 9, a second water outlet nozzle 10, a water pump 11, a water storage tank 12, a first pipeline 13, a second pipeline 14, a third pipeline 15, a first through groove 16, a second through groove 17, a sliding groove 18 and a sliding block 19.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.
Example 1
Referring to fig. 1 to 3, an embodiment of the present invention provides an atomizer for municipal engineering, including: the device comprises a box body 1, a first rotating shaft 2, a second rotating shaft 3, a fixed seat 4, a first telescopic rod 5, a second telescopic rod 6, a first atomizing nozzle 7, a second atomizing nozzle 8, a first water outlet nozzle 9, a second water outlet nozzle 10, a water pump 11, a water storage tank 12, a first pipeline 13, a second pipeline 14 and a third pipeline 15; the fixed seat 4 is fixed inside the box body 1; the first telescopic rod 5 and the second telescopic rod 6 are both rotatably arranged on the fixed seat 4, and the first water outlet spray pipe 9 and the second water outlet spray pipe 10 are both pipelines with two closed ends; the telescopic end of the first telescopic rod 5 is connected with the first water outlet spray pipe 9 in a sliding manner; the telescopic end of the second telescopic rod 6 is connected with the second water outlet spray pipe 10 in a sliding manner; the first water outlet spray pipe 9 is rotatably connected with the box body 1 through the first rotating shaft 2; the second water outlet spray pipe 10 is rotatably connected with the box body 1 through the second rotating shaft 3; the first atomizing nozzle 7 is arranged at the end of the first water outlet spray pipe 9, the second atomizing nozzle 8 is arranged at the end of the second water outlet spray pipe 10, and a group of opposite side walls of the box body 1 are respectively provided with a first through groove 16 and a second through groove 17; the water inlet end of the water pump 11 is communicated with the water storage tank 12 through the first pipeline 13, and the water outlet end of the water pump 11 is communicated with the first water outlet spray pipe 9 through the second pipeline 14; the water outlet end of the water pump 11 is communicated with the second water outlet spray pipe 10 through a third pipeline 15.
It should be noted that the water pump 11 adopted in this embodiment can be obtained by direct purchase, and in this embodiment, the type and model of the water pump 11 are not limited, specifically, a person skilled in the art can operate and connect according to the instruction manual of the water pump 11 obtained by purchase; in the present embodiment, the water stored in the water storage tank 12 is pumped to the water outlet nozzle by the water pump 11 and atomized and sprayed out through the atomizer arranged on the top side wall of the water outlet nozzle.
It should be noted that above-mentioned atomizer can directly purchase and obtain, for example, 304 stainless steel low pressure high pressure mist spray humidification deodorization atomizer nozzle LNM type that the science and technology limited company of spray purification of branch of Dongguan city produced is sprayed to spray low pressure and is prevented leaking meticulous atomizer, certainly can also be the atomizer that other producers produced, this embodiment does not do the restriction to atomizer's kind and model, in practical application, for the convenience of installation, generally select the atomizer that has the external screw thread to use, at first set up a plurality of screw holes on the lateral wall of water spray pipe, all correspond in each screw hole and screw in one atomizer, in order to accomplish to blow being connected of water spray pipe and atomizer, and is simple and convenient.
In the using process, the atomizer for municipal construction is moved to a construction site, then the first telescopic rod 5 and the second telescopic rod 6 are started, the first telescopic rod 5 retracts, the first water outlet spray pipe 9 arranged at the telescopic end of the first telescopic rod 5 is driven to rotate by taking the first rotating shaft 2 as the center, at the moment, the first atomizing nozzle 7 arranged at the end part of the first water outlet spray pipe 9 rotates towards the side wall direction of the box body 1 until the first atomizing nozzle 7 penetrates through the side wall of the box body 1 from the first through groove 16, and the first telescopic rod 5 stops moving; the second telescopic rod 6 retracts to further drive the second water outlet spray pipe 10 arranged at the telescopic end of the second telescopic rod 6 to rotate by taking the second rotating shaft 3 as a center, at the moment, the second atomizing spray head 8 arranged at the end part of the second water outlet spray pipe 10 rotates towards the side wall direction of the box body 1 until the second atomizing spray head 8 passes through the side wall of the box body 1 from the second through groove 17, and the second telescopic rod 6 stops moving; then, the water pump 11 is started, the water pump 11 starts to work, water stored in the water storage tank 12 is pumped to the first water outlet spray pipe 9 and the second water outlet spray pipe 10, a plurality of through holes are formed in the side walls of the first water outlet spray pipe 9 and the second water outlet spray pipe 10, a first atomizing nozzle 7 is correspondingly arranged at each of the plurality of through holes of the first water outlet spray pipe 9, a second atomizing nozzle 8 is correspondingly arranged at each of the plurality of through holes of the second water outlet spray pipe 10, water pumped to the water outlet spray pipes through the water pump 11 is sprayed out through the first atomizing nozzle 7 and the second atomizing nozzle 8, and sprayed atomized water is used for dust falling of a construction site; after the construction is finished, the first telescopic rod 5 and the second telescopic rod are controlled to retract, so that the first atomizing nozzle 7 and the second atomizing nozzle 8 are driven to retract, and the possibility that the atomizing nozzles and the water outlet spray pipe are damaged by external force is reduced; by adopting the atomizer for municipal construction provided by the embodiment of the invention, the atomizer can be arranged according to the construction site.
In one embodiment, referring to fig. 3, the first telescopic rod 5 is slidably connected to the first water outlet nozzle 9 through a sliding assembly; the sliding component comprises a sliding groove 18 and a sliding block 19; the sliding block 19 is in limited sliding connection with the sliding groove 18; the telescopic end of the first telescopic rod 5 is rotatably connected with the sliding block 19; the sliding groove 18 is fixedly arranged on the bottom side wall of the first water outlet spray pipe 9.
In one embodiment, referring to fig. 3, the second telescopic rod 6 is slidably connected to the second water outlet nozzle 10 through a sliding assembly; the sliding component comprises a sliding groove 18 and a sliding block 19; the sliding block 19 is in limited sliding connection with the sliding groove 18; the telescopic end of the second telescopic rod 6 is rotatably connected with the sliding block 19; the sliding groove 18 is fixedly arranged on the bottom side wall of the second water outlet spray pipe 10.
In the using process, the atomizer for municipal construction is moved to a construction site, then the first telescopic rod 5 and the second telescopic rod 6 are started, the first telescopic rod 5 retracts, the first water outlet spray pipe 9 arranged at the telescopic end of the first telescopic rod 5 is driven to rotate by taking the first rotating shaft 2 as the center, at the moment, the first atomizing nozzle 7 arranged at the end part of the first water outlet spray pipe 9 rotates towards the side wall direction of the box body 1 until the first atomizing nozzle 7 penetrates through the side wall of the box body 1 from the first through groove 16, and the first telescopic rod 5 stops moving; the second telescopic rod 6 retracts to further drive the second water outlet spray pipe 10 arranged at the telescopic end of the second telescopic rod 6 to rotate by taking the second rotating shaft 3 as a center, at the moment, the second atomizing spray head 8 arranged at the end part of the second water outlet spray pipe 10 rotates towards the side wall direction of the box body 1 until the second atomizing spray head 8 passes through the side wall of the box body 1 from the second through groove 17, and the second telescopic rod 6 stops moving; then, the water pump 11 is started, the water pump 11 starts to work, water stored in the water storage tank 12 is pumped to the first water outlet spray pipe 9 and the second water outlet spray pipe 10, a plurality of through holes are formed in the side walls of the first water outlet spray pipe 9 and the second water outlet spray pipe 10, a first atomizing nozzle 7 is correspondingly arranged at each of the plurality of through holes of the first water outlet spray pipe 9, a second atomizing nozzle 8 is correspondingly arranged at each of the plurality of through holes of the second water outlet spray pipe 10, water pumped to the water outlet spray pipes through the water pump 11 is sprayed out through the first atomizing nozzle 7 and the second atomizing nozzle 8, and sprayed atomized water is used for dust falling of a construction site; after the construction is finished, the first telescopic rod 5 and the second telescopic rod are controlled to retract, so that the first atomizing nozzle 7 and the second atomizing nozzle 8 are driven to retract, and the possibility that the atomizing nozzles and the water outlet spray pipe are damaged by external force is reduced; by adopting the atomizer for municipal construction provided by the embodiment of the invention, the atomizer can be arranged according to the construction site.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; 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 (3)
1. An atomizer for municipal works, comprising: the device comprises a box body, a first rotating shaft, a second rotating shaft, a fixed seat, a first telescopic rod, a second telescopic rod, a first atomizing nozzle, a second atomizing nozzle, a first water outlet nozzle, a second water outlet nozzle, a water pump, a water storage tank, a first pipeline, a second pipeline and a third pipeline;
the fixed seat is fixed inside the box body; the first telescopic rod and the second telescopic rod are both rotatably arranged on the fixed seat, and the first water outlet spray pipe and the second water outlet spray pipe are pipelines with two closed ends; the telescopic end of the first telescopic rod is connected with the first water outlet spray pipe in a sliding manner; the telescopic end of the second telescopic rod is connected with the second water outlet spray pipe in a sliding manner; the first water outlet spray pipe is rotationally connected with the box body through the first rotating shaft; the second water outlet spray pipe is rotationally connected with the box body through the second rotating shaft; the first atomization nozzle is arranged at the end part of the first water outlet spray pipe, the second atomization nozzle is arranged at the end part of the second water outlet spray pipe, and a group of opposite side walls of the box body are respectively provided with a first through groove and a second through groove; the water inlet end of the water pump is communicated with the water storage tank through the first pipeline, and the water outlet end of the water pump is communicated with the first water outlet spray pipe through the second pipeline; and the water outlet end of the water pump is communicated with the second water outlet spray pipe through a third pipeline.
2. The atomizer for municipal engineering according to claim 1, wherein the first telescoping rod is slidably connected to the first outlet spout via a sliding assembly; the sliding assembly comprises a sliding chute and a sliding block; the sliding block is in limit sliding connection with the sliding groove; the telescopic end of the first telescopic rod is rotatably connected with the sliding block; the sliding groove is fixedly arranged on the side wall of the bottom of the first water outlet spray pipe.
3. The atomizer for municipal engineering according to claim 1, wherein the second telescoping rod is slidably connected to the second outlet nozzle by a sliding assembly; the sliding assembly comprises a sliding chute and a sliding block; the sliding block is in limit sliding connection with the sliding groove; the telescopic end of the second telescopic rod is rotatably connected with the sliding block; the sliding groove is fixedly arranged on the side wall of the bottom of the second water outlet spray pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295396.9A CN112452078A (en) | 2020-11-18 | 2020-11-18 | Atomizer that municipal works were used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295396.9A CN112452078A (en) | 2020-11-18 | 2020-11-18 | Atomizer that municipal works were used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112452078A true CN112452078A (en) | 2021-03-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011295396.9A Pending CN112452078A (en) | 2020-11-18 | 2020-11-18 | Atomizer that municipal works were used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112452078A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202356221U (en) * | 2011-11-04 | 2012-08-01 | 重庆晴点农业开发有限公司 | Sprayer |
| CN110193433A (en) * | 2019-06-06 | 2019-09-03 | 南京高烯环境科技有限公司 | A kind of environmental project construction site spraying device |
| CN209386653U (en) * | 2018-12-27 | 2019-09-13 | 大英新代机械制造有限公司 | A kind of multi-functional cooling spray flusher |
| CN210357623U (en) * | 2019-06-06 | 2020-04-21 | 南京润北智能环境研究院有限公司 | Building site atomizer for environmental engineering |
| CN211283758U (en) * | 2019-10-18 | 2020-08-18 | 张胜荣 | Sewage treatment agent sprays structure for sewage treatment |
| CN211384341U (en) * | 2019-12-21 | 2020-09-01 | 林玉冬 | Dust device is used in civil engineering construction |
| CN211422057U (en) * | 2019-09-02 | 2020-09-04 | 苏州琦少工程科技有限公司 | Municipal administration dust collecting equipment with function of making an uproar falls for building processing |
| CN211587129U (en) * | 2019-12-31 | 2020-09-29 | 山东大拇指喷雾设备有限公司 | Supporting frame convenient for angle adjustment for atomizing spray head |
| CN211725148U (en) * | 2020-01-24 | 2020-10-23 | 重庆房地产职业学院 | Building site is with intelligent dust device based on thing networking |
| CN211864355U (en) * | 2020-02-11 | 2020-11-06 | 王淑义 | Water spraying device for constructional engineering |
-
2020
- 2020-11-18 CN CN202011295396.9A patent/CN112452078A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202356221U (en) * | 2011-11-04 | 2012-08-01 | 重庆晴点农业开发有限公司 | Sprayer |
| CN209386653U (en) * | 2018-12-27 | 2019-09-13 | 大英新代机械制造有限公司 | A kind of multi-functional cooling spray flusher |
| CN110193433A (en) * | 2019-06-06 | 2019-09-03 | 南京高烯环境科技有限公司 | A kind of environmental project construction site spraying device |
| CN210357623U (en) * | 2019-06-06 | 2020-04-21 | 南京润北智能环境研究院有限公司 | Building site atomizer for environmental engineering |
| CN211422057U (en) * | 2019-09-02 | 2020-09-04 | 苏州琦少工程科技有限公司 | Municipal administration dust collecting equipment with function of making an uproar falls for building processing |
| CN211283758U (en) * | 2019-10-18 | 2020-08-18 | 张胜荣 | Sewage treatment agent sprays structure for sewage treatment |
| CN211384341U (en) * | 2019-12-21 | 2020-09-01 | 林玉冬 | Dust device is used in civil engineering construction |
| CN211587129U (en) * | 2019-12-31 | 2020-09-29 | 山东大拇指喷雾设备有限公司 | Supporting frame convenient for angle adjustment for atomizing spray head |
| CN211725148U (en) * | 2020-01-24 | 2020-10-23 | 重庆房地产职业学院 | Building site is with intelligent dust device based on thing networking |
| CN211864355U (en) * | 2020-02-11 | 2020-11-06 | 王淑义 | Water spraying device for constructional engineering |
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Application publication date: 20210309 |