CN113756247A - Adjustable greenbelt cleaning spray head device and method - Google Patents

Adjustable greenbelt cleaning spray head device and method Download PDF

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Publication number
CN113756247A
CN113756247A CN202111017205.7A CN202111017205A CN113756247A CN 113756247 A CN113756247 A CN 113756247A CN 202111017205 A CN202111017205 A CN 202111017205A CN 113756247 A CN113756247 A CN 113756247A
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China
Prior art keywords
spray head
water outlet
water
nozzle
green belt
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Pending
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CN202111017205.7A
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Chinese (zh)
Inventor
谌礼群
向康
廖芳珍
李春波
申文静
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Shenzhen Technology University
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Shenzhen Technology University
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Priority to CN202111017205.7A priority Critical patent/CN113756247A/en
Publication of CN113756247A publication Critical patent/CN113756247A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/10Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
    • E01H1/101Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/68Arrangements for adjusting the position of spray heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02Cleaning by the force of jets or sprays

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention belongs to the field of environmental sanitation equipment, and particularly relates to an adjustable greenbelt cleaning nozzle device and method, which can accurately and automatically clean urban road greenbelts with different widths. The water outlet taper delta and the water outlet angle theta of the spray head are adjustable, so that green belts of different urban roads can be accurately cleaned, and water resources are effectively saved; the cleaning strategy is established in advance, the water outlet taper delta and the water outlet angle theta are both electrically adjusted by the motor, manual operation is not needed, and labor can be effectively saved; the water outlet is cylindrical, the atomization effect is small, the impact force of the water column is strong, and dust accumulated on the surface of the vegetation can be effectively washed.

Description

Adjustable greenbelt cleaning spray head device and method
Technical Field
The invention belongs to the field of environmental sanitation equipment, and particularly relates to an adjustable greenbelt cleaning nozzle device and method.
Background
Be provided with the greenbelt in the urban road usually, the greenbelt is usually set up in big road both sides, if the dust is not cleared up for a long time, the breathing hole on the blade surface can be blockked up to too many on the ash layer on the plant blade surface for plant photosynthesis is obstructed, causes the plant withered.
The urban road green belt mainly uses shrubs, and the cleaning mode is mainly mobile spraying of a garden operation vehicle, namely manual handheld spraying. In the manual cleaning process, due to the instability of manual operation, the water outlet range is difficult to control accurately, accurate cleaning cannot be realized, and a large amount of water is sprayed outside the green belt. Meanwhile, the design of the spray head of the self structure of the existing cleaning equipment is not enough, so that the outlet shape of the cleaning equipment is a vaporific hollow cone, the outlet uniformity is general, the impact force is small, the drift loss is easy to generate, the cleaning needs to be carried out for many times, and the utilization rate of water resources is low.
Disclosure of Invention
The invention provides a cleaning spray head device and a cleaning spray head method for an urban road green belt, which can automatically adjust the water outlet range, and aims to solve the problem of low spraying efficiency of the existing high-position spray head.
The technical problem of the invention is solved by the following technical scheme: the utility model provides an adjustable greenbelt washs shower nozzle device, includes water spray subassembly and rotary mechanism, the water spray subassembly includes shower nozzle inlayer device, shower nozzle outer device and drive assembly, the shower nozzle inlayer of shower nozzle inlayer device and the shower nozzle skin of shower nozzle outer device all are provided with the apopore, drive assembly's steering wheel is used for controlling the play water tapering of shower nozzle device, rotary mechanism includes rotary device and auxiliary device, rotary device includes step motor for the play water angle of control shower nozzle device, the water pipe both sides through screw-thread fit with water spray subassembly and rotary mechanism connect.
Further, the nozzle inlayer and the nozzle inlayer all set to the cambered surface structure, the nozzle inlayer is fixed, the nozzle skin is laminated in the nozzle inlayer and is done relative rotation, control the degree of alignment of nozzle inlayer and nozzle inlayer apopore.
Furthermore, five circles of water outlet holes are arranged on the inner layer and the outer layer of the spray head, the included angle range between each circle of water outlet holes and the circle center from inside to outside is 12-30 degrees, and the water outlet taper range of the water outlet holes corresponding to the circle outlet holes is 28-98 degrees.
Furthermore, the outer layer of the spray head rotates by integral multiple of 15 degrees to adjust the corresponding water outlet gear.
Furthermore, the water spraying assembly is controlled to rotate by the steering engine, the outer layer of the spray head is driven to rotate under the transmission of the first large gear in the transmission assembly, and the change of different water outlet tapers is completed.
Furthermore, the rotating mechanism controls the second gearwheel and the hollow pipe of the rotating device to rotate through the stepping motor, so that the adjustment of different water outlet angles is completed.
Further, the invention also provides a method for cleaning a green belt by using the spray head device, which comprises the following steps:
1) determining the height of the spray head device and the width from the spray head device to the green belt;
2) determining the width of a green belt;
3) adjusting the water outlet taper and the water outlet angle which are needed corresponding to the position of the spray head device and the green belt.
Further, the step 1) determines that the installation height of the spray head device is 1.9m and the width from the green belt is 0.5m through research.
Further, the width of the green belt in the step 2) meeting the standard of the urban conventional road green belt is set to be 2m, 3m and 4 m.
Compared with the existing high-position spraying cleaning device, the invention has the beneficial effects that:
1) accurate cleaning of green belts with different widths: by adjusting the water outlet taper delta and the water outlet angle theta of the spray head, the urban road green belts with different widths can be accurately cleaned, and the water loss caused by inaccurate water outlet range of the traditional high-level spraying device is effectively reduced;
2) need not artifical the participation, use manpower sparingly: the steering engine is connected with the transmission shaft through the coupler, the transmission shaft is connected with the gear through a key, the reduction gear is connected with the outer layer of the spray head through a key and is positioned through the snap spring to drive the outer layer of the spray head to rotate, the alignment condition of the water outlet holes is controlled by controlling the relative position of the inner layer and the outer layer of the spray head, and the water outlet taper delta of the spray head is further automatically controlled; the step motor is connected with the transmission shaft through the coupler, the transmission shaft is connected with the gear through the key, the reduction gear is connected with the hollow shaft through the key and is positioned through the clamp spring, the rotation of the spray head module can be integrally controlled by controlling the rotation of the step motor, and therefore the water outlet angle theta of the spray head can be automatically adjusted.
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, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a showerhead apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic view of a water spray assembly in an embodiment of the invention.
Fig. 3 is an exploded view of a water jet assembly in an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating positions of water outlet holes in the outer layer and the inner layer of the nozzle in the embodiment of the invention.
Fig. 5 is a schematic diagram illustrating alignment of water outlet holes in different positions according to an embodiment of the present invention.
Fig. 6 is a schematic view of a rotating mechanism in an embodiment of the invention.
FIG. 7 is a schematic view of the adjustment of the water outlet range of the sprinkler head device according to the embodiment of the present invention.
The labels in the figure are: the water spraying device comprises a water spraying component 1, a spray head inner layer device 11, a spray head inner layer 111, an inner layer spray head lower joint 112, an inner layer spray head upper joint 113, a spray head outer layer device 12, a spray head outer layer 121, an outer layer spray head joint 122, a transmission component 13, a first large gear 131, a steering engine 132, a coupling 133, a transmission shaft 134, a first small gear 135, a rolling bearing 136, a fixing component 14, a sealing ring 141, a spray head clamp spring 142, a steering engine fixing plate 143, a shaft sleeve 144, a bearing cover 145, a key 146, a steering engine fixing welding plate 147, a telescopic shaft 148, a sleeve ring 149, a water outlet hole 15, a rotating mechanism 2, a rotating device 21, a hollow pipe 211, a second large gear 212, a stepping motor 213, an assisting shaft 214, a second small gear 215, an auxiliary device 22, a stepping motor fixing plate 221, a rotating clamp spring 222 and a water pipe 3.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides an adjustable greenbelt cleaning spray head device, which comprises the following components in percentage by weight as shown in figures 1-2: the water spraying device comprises a water spraying component 1, a rotating mechanism 2 and a water pipe 3, wherein the water spraying component 1 comprises a spray head inner layer device 11, a spray head outer layer device 12, a transmission component 13, a fixing component 14 and a water outlet hole 15, and as shown in the figure 2-3, the spray head inner layer device 11 consists of a spray head inner layer 111, an inner layer spray head lower joint 112 and an inner layer spray head upper joint 113; the nozzle outer layer device 12 consists of a nozzle outer layer 121 and an outer layer nozzle joint 122, and the nozzle inner layer 111 and the nozzle outer layer 121 are provided with water outlet holes 15; the transmission assembly 13 comprises a first large gear 131, a steering engine 132, a coupling 133, a transmission shaft 134, a first small gear 135 and a rolling bearing 136; the fixed assembly 14 comprises a sealing ring 141, a spray head clamp spring 142, a steering engine fixing plate 143, a shaft sleeve 144, a bearing cover 145, a key 146, a steering engine fixing welding plate 147, a telescopic shaft 148 and a sleeve ring 149.
In a specific embodiment, the nozzle inner layer 111 is connected with the inner layer nozzle lower joint 112 through screws, the inner layer nozzle lower joint 112 is connected with the inner layer nozzle upper joint 113 through bolts, the nozzle outer layer device 12 is composed of a nozzle outer layer 121 and an outer layer nozzle joint 122, the nozzle outer layer 121 and the nozzle outer layer 121 are connected through bolts, the nozzle inner layer 111 and the nozzle outer layer 121 are sealed through a sealing ring 141, and it is ensured that water columns are only output from the aligned water outlet holes 15.
Specifically, as shown in fig. 2 to 3, the inner nozzle device 11 is integrally fixed, the inner nozzle upper joint 113 and the steering engine fixing anchor plate 147 are fixed by bolts, the steering engine fixing anchor plate 147 and the steering engine fixing plate 143 are also connected by bolts, two shaft sleeves 144 are sleeved on the steering engine fixing anchor plate 147, the shaft sleeves 144 are fixedly connected by screws, one end of an expansion shaft 148 is arranged in the shaft sleeves by a lantern ring 149, the other end of the expansion shaft 148 nests a first gearwheel 131, and the expansion shaft 148 adjusts the position of the first gearwheel 131 through expansion and contraction activities and further engages with the gearwheel 135 of the first pinion. The steering engine 132 is installed on the steering engine fixing plate 143, four corners are fixed, the steering engine fixing plate 143 is fixed to the side plate through screws, the steering engine fixing plate 143 and the rolling bearing 136 are guaranteed to be fixed relatively through the side plate, the steering engine 132 drives the transmission shaft 134 to rotate through the coupler 133, the rolling bearing 136 supports the transmission shaft 134, and the shaft sleeve 144 and the bearing cover 145 position the rolling bearing 136. The transmission shaft 134 is connected with the pinion gear 136 through a key 146, and the first pinion gear 135 drives the first bull gear 131 to rotate, so as to drive the spray head outer layer device 12 to rotate, thereby adjusting the water outlet taper δ. The first large gear 131 is connected with the outer layer nozzle joint 122 through a key 146 and is limited by the nozzle clamp spring 142.
Preferably, the inner layer 111 and the outer layer 121 of the spray head are arranged into arc-shaped structures, so that the water outlet shape of the water spray component 1 is ensured to be conical solid flow, the water outlet range of the spray head is accurately controlled, and the water outlet uniformity and impact force of the spray head are improved; the shower nozzle inlayer 111 is fixed, and shower nozzle outer 121 laminates in shower nozzle inlayer 111 and can relative rotation to this control every circle of water outlet aligns, accomplishes out water tapering delta transform, and circular apopore can effectively reduce shower nozzle water area, increases water pressure, makes to obtain the water form for cylindric, and atomization effect is little, and the water column impact force is strong, reaches better cleaning performance.
Furthermore, the inner layer 111 and the outer layer 121 of the nozzle are both provided with 5 circles of water outlet holes 15, the corresponding number of circles of apertures of the inner layer and the outer layer of the nozzle are consistent, as shown in fig. 4, the included angles between the circles of water outlet holes 15 and the circle center from inside to outside are 15 °, 30 °, 12 °, 18 °, and the water outlet tapers δ of the corresponding water outlet holes 15 are 28 °, 43 °, 60 °, 78 °, and 98 °; fig. 5 shows the condition that the four gear water outlet holes 15 are aligned, namely the conditions that the outer layer 121 of the nozzle rotates by 45 degrees, 30 degrees, 60 degrees and 90 degrees, the white represents the aligned holes, the black represents the closed holes, the outer layer 121 of the nozzle is driven to rotate under the transmission of the first large gear 131 by controlling the rotation of the steering engine 132, the arrangement of the four gear water outlet holes 15 is realized, and the conversion of different water outlet tapers δ is realized.
Specifically, as shown in fig. 6, the rotating mechanism 2 includes a rotating device 21 and an auxiliary device 22, the rotating device 21 includes a hollow tube 211, a second large gear 212, a stepping motor 213, an auxiliary shaft 214, and a second small gear 215, and the auxiliary device 22 includes a stepping motor fixing plate 221 and a rotation clamp spring 222. The step motor 213 is connected with the auxiliary shaft 214 and fixed on the step motor fixing plate 221, the auxiliary shaft 214 is transmitted to the second small gear 215 through the step motor 213, the second small gear 215 drives the second large gear 212, the hollow tube 211 is connected with the second large gear 212, the positioning is carried out by utilizing the rotating snap spring 222, and finally the rotation of the step motor 213 is controlled to integrally control the rotation of the water spraying assembly 1, so that the water outlet angle theta of the spray head is automatically adjusted.
Specifically, water spray component 1 passes through water pipe 3 with rotary mechanism 2 and is connected, and 3 one sides of water pipe are connected with hollow tube 211 through screw-thread fit, and the opposite side passes through screw-thread fit and is connected with inlayer shower nozzle top connection 113, when step motor 213 drives hollow tube 211 and rotates, and then drives water pipe 3 and water spray component 1 and wholly rotate to adjust the play water angle theta of shower nozzle module.
Referring to fig. 7, the cleaning method of the present invention is performed by the water spray assembly 1, the rotating mechanism 2 and the water pipe 3. Under different embodiments, if the accurate cleaning of road green belts with different widths is to be realized, after the height h of the spray head and the width l of the spray head from the green belts are determined, the accurate cleaning of the green belts with different widths is realized by adjusting the water outlet taper delta and the water outlet angle theta of the spray head, the cleaning process does not need manual operation, and the human resources can be effectively saved.
According to the investigation on the specification of the urban road green belt, the distance l between the operation vehicle and the green belt is determined to be about 0.5m, and the installation height h of the spray head is determined to be about 1.9 m. The width of the urban conventional road green belt is 2m, 3m and 4m as can be known through actual measurement and related standard query. Through theoretical design and practical experiments, cleaning methods for road green belts with three widths of 2m, 3m and 4m are determined, and are shown in table 1.
TABLE 1 method for cleaning green belt of road with common width
Figure BDA0003240316450000061
As shown in fig. 7, the schematic diagram is to operate on green belts with widths of 2m and 4m, where δ 1 and θ 1 are the water outlet angle and the water outlet taper when the green belt has a width of 2m, respectively, and δ 2 and θ 2 represent the water outlet angle and the water outlet taper when the green belt has a width of 4m, respectively.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides an adjustable greenbelt washs shower nozzle device, is including the water spray subassembly, water pipe and the rotary mechanism that connect gradually, the water spray subassembly includes shower nozzle inlayer device, shower nozzle outer device and drive assembly, the shower nozzle inlayer of shower nozzle inlayer device and the shower nozzle skin of shower nozzle outer device all are provided with the apopore, the steering wheel control shower nozzle device's of drive assembly play water tapering, rotary mechanism includes rotary device and auxiliary device, rotary device's step motor control shower nozzle device's play water angle, the water pipe both sides through screw-thread fit with water spray subassembly and rotary mechanism are connected.
2. The adjustable green belt cleaning spray head device according to claim 1, wherein the inner spray head layer and the inner spray head layer are both arranged in an arc structure, the inner spray head layer is fixed, and the outer spray head layer is attached to the inner spray head layer to rotate relatively to control the degree of alignment of the water outlets of the inner spray head layer and the inner spray head layer.
3. The adjustable green belt cleaning nozzle device according to claim 1, wherein the inner nozzle layer and the outer nozzle layer are provided with five circles of water outlet holes, the included angle between each circle of water outlet holes and the circle center from inside to outside ranges from 12 degrees to 30 degrees, and the water outlet taper range of the corresponding water outlet hole ranges from 28 degrees to 98 degrees.
4. The adjustable greenbelt cleaning nozzle device as claimed in claim 3, wherein the nozzle outer layer is rotated by an integral multiple of 15 ° to adjust the corresponding water outlet gear.
5. The adjustable green belt cleaning spray head device according to claim 1, wherein the water spraying assembly is controlled to rotate by the steering engine, and the outer layer of the spray head is driven to rotate under the transmission of a first large gear in the transmission assembly, so that the change of different water outlet tapers is completed.
6. The adjustable greenbelt cleaning nozzle device as claimed in claim 1, wherein the rotating mechanism controls the second gearwheel and the hollow tube of the rotating device to rotate through the stepping motor, so as to adjust different water outlet angles.
7. A method for cleaning green belts by using the spray head device of any one of claims 1 to 6, which is characterized by comprising the following steps:
1) determining the height of the spray head device and the width from the spray head device to the green belt;
2) determining the width of a green belt;
3) adjusting the water outlet taper and the water outlet angle which are needed corresponding to the position of the spray head device and the green belt.
8. The method for cleaning the green belt by using the nozzle device as claimed in claim 7, wherein the installation height of the nozzle device in the step 1) is 1.5-2 m, and the width from the green belt is 0.1-0.5 m.
9. The method for cleaning the green belt by the nozzle device as claimed in claim 7, wherein the width of the green belt in the step 2) meeting the standard of the urban conventional road green belt is set to be 2-4 m.
CN202111017205.7A 2021-08-31 2021-08-31 Adjustable greenbelt cleaning spray head device and method Pending CN113756247A (en)

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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270951A1 (en) * 1974-05-15 1975-12-12 Sovel Vehicules Elect Ind Street washing spray nozzle assembly - has height adjusting and slewing rams supplied by tapping water to nozzles
CH598422A5 (en) * 1976-07-02 1978-04-28 Baldini Paul Fa Mobile tunnel cleaning and spraying machine
US20050050627A1 (en) * 2002-02-15 2005-03-10 Tokunbo Ayeni Spa jet mounting assembly and method of installation
CN1631549A (en) * 2005-01-13 2005-06-29 浙江大学 Atomized spray head
CN1697708A (en) * 2003-05-14 2005-11-16 米思文有限公司 Method and apparatus for producing droplet spray
CN203270494U (en) * 2013-05-22 2013-11-06 向康 Water-saving road green belt cleaning device
CN105080740A (en) * 2014-05-14 2015-11-25 湖南科伦制药有限公司 Novel washing bottle shower nozzle
CN106223249A (en) * 2016-07-24 2016-12-14 扬州金威环保科技有限公司 The height of a kind of sweeper compresses and washes ground device
US20170087581A1 (en) * 2015-09-30 2017-03-30 Aqualean Manufacturing Associates Co., Ltd. Sprinkling device
CN108620265A (en) * 2017-03-23 2018-10-09 麦乐诺尔股份有限公司 The injection nozzle of adjustable angle
CN108672113A (en) * 2018-07-17 2018-10-19 杭州风扬环保科技有限公司 A kind of garden landscape Irrigation shower head freely controlling spray regime
CN211983082U (en) * 2020-04-28 2020-11-24 赵博 Water-saving and water-spraying control device for landscaping
CN212077766U (en) * 2019-12-26 2020-12-04 青岛林海建设工程有限公司 High-efficient cleaning and dust removing device in building field
CN213727237U (en) * 2020-08-26 2021-07-20 中通新能源汽车有限公司 Device for cleaning pipeline and adjusting angle of nozzle

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270951A1 (en) * 1974-05-15 1975-12-12 Sovel Vehicules Elect Ind Street washing spray nozzle assembly - has height adjusting and slewing rams supplied by tapping water to nozzles
CH598422A5 (en) * 1976-07-02 1978-04-28 Baldini Paul Fa Mobile tunnel cleaning and spraying machine
US20050050627A1 (en) * 2002-02-15 2005-03-10 Tokunbo Ayeni Spa jet mounting assembly and method of installation
CN1697708A (en) * 2003-05-14 2005-11-16 米思文有限公司 Method and apparatus for producing droplet spray
CN1631549A (en) * 2005-01-13 2005-06-29 浙江大学 Atomized spray head
CN203270494U (en) * 2013-05-22 2013-11-06 向康 Water-saving road green belt cleaning device
CN105080740A (en) * 2014-05-14 2015-11-25 湖南科伦制药有限公司 Novel washing bottle shower nozzle
US20170087581A1 (en) * 2015-09-30 2017-03-30 Aqualean Manufacturing Associates Co., Ltd. Sprinkling device
CN106223249A (en) * 2016-07-24 2016-12-14 扬州金威环保科技有限公司 The height of a kind of sweeper compresses and washes ground device
CN108620265A (en) * 2017-03-23 2018-10-09 麦乐诺尔股份有限公司 The injection nozzle of adjustable angle
CN108672113A (en) * 2018-07-17 2018-10-19 杭州风扬环保科技有限公司 A kind of garden landscape Irrigation shower head freely controlling spray regime
CN212077766U (en) * 2019-12-26 2020-12-04 青岛林海建设工程有限公司 High-efficient cleaning and dust removing device in building field
CN211983082U (en) * 2020-04-28 2020-11-24 赵博 Water-saving and water-spraying control device for landscaping
CN213727237U (en) * 2020-08-26 2021-07-20 中通新能源汽车有限公司 Device for cleaning pipeline and adjusting angle of nozzle

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