CN112007767B - Water spraying nozzle for sanitation vehicle and sanitation vehicle - Google Patents
Water spraying nozzle for sanitation vehicle and sanitation vehicle Download PDFInfo
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- CN112007767B CN112007767B CN202010867380.4A CN202010867380A CN112007767B CN 112007767 B CN112007767 B CN 112007767B CN 202010867380 A CN202010867380 A CN 202010867380A CN 112007767 B CN112007767 B CN 112007767B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, 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
- B05B1/04—Nozzles, 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 in flat form, e.g. fan-like, sheet-like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/68—Arrangements for adjusting the position of spray heads
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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
- E01H3/02—Mobile apparatus, e.g. watering-vehicles
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Nozzles (AREA)
Abstract
The invention relates to the field of sanitation vehicles, in particular to a water spraying nozzle for a sanitation vehicle and the sanitation vehicle. The water spraying nozzle for the sanitation truck comprises a shell, wherein a spraying hole is formed in the shell, the spraying hole comprises a main spraying hole and a compensation spraying hole, the spraying range is partially overlapped with the spraying range of the main spraying hole, and the compensation main spraying hole is used for spraying water in a relatively small area. Because the compensation spraying holes are arranged above and/or below the main spraying holes, the spraying range of the compensation spraying holes is partially overlapped with the spraying range of the main spraying holes and used for compensating the water amount of the area with relatively less water amount distribution after the main spraying holes are sprayed, so that the target spraying area of the sanitation vehicle can obtain approximately equal water amount, and the problem that the water amount in the spraying coverage range of the existing sanitation vehicle is uneven in distribution is solved.
Description
Technical Field
The invention relates to the field of sanitation vehicles, in particular to a water spraying nozzle for a sanitation vehicle and the sanitation vehicle.
Background
The sanitation vehicle plays an important role in urban environment treatment and maintenance, and especially plays an irreplaceable role in inhibiting road dust.
The sanitation vehicle with the sprinkling function is structurally characterized in that as the patent specification with the publication number of CN210368798U and the publication date of 21/4/2020 describes, the sanitation vehicle comprises a vehicle chassis, a water storage tank arranged on the vehicle chassis and a sprinkling device which is also arranged on the chassis and connected with the water storage tank, wherein the sprinkling device comprises two sprinkling nozzles (sprinkling heads), the two sprinkling nozzles are respectively positioned at the left side and the right side of the sanitation vehicle when in use, and water is sprayed to the left side and the right side of the sanitation vehicle to clean the road surface. The spraying head is provided with a spraying hole, and when the water-saving cleaning device is used, clear water in the water storage tank is sprayed out through the spraying nozzle under the action of the water pump, so that cleaning operation is performed.
In the above patent, the nozzle is of a cylindrical structure, and the plurality of spray holes are circumferentially arranged on the nozzle in a plurality of rows, and are arranged in the axial direction of the nozzle. In order to adjust the spraying range of the water spraying nozzle, a piston is arranged in the water spraying nozzle, and when the water spraying nozzle is used, the number of spraying holes participating in water spraying is adjusted in the axial direction through the movement of the piston, so that the spraying range of the water spraying nozzle in the width direction of the sanitation vehicle is adjusted.
In addition to the sprinkler nozzle of the above-described structure, another structure of the sprinkler nozzle is disclosed in patent specification with publication number CN204922203U and publication date 2015, 12 and 30. The water spraying nozzle comprises a nozzle shell and a sliding valve body, wherein the nozzle shell comprises a water pipe connecting flange, an outer sleeve, a bottom end closing plate and two water retaining vertical plates, a vertical strip hole is formed in the middle pipe wall of the outer sleeve, a rectangular opening is formed in the lower end of the outer sleeve, the rectangular opening and the bottom end closing plate form a flat water outlet (a spraying hole), the two water retaining vertical plates are opposite to each other, the vertical center of the flat water outlet is symmetrically arranged, the horizontal included angle between the two is 120 degrees, water sprayed out of the water spraying nozzle can form fan-shaped water flow, the sliding valve body comprises an inner sleeve, a limiting guide boss, a screw and a butterfly nut, and the limiting guide boss is connected with the vertical strip hole in a sliding mode. The height of the inner sleeve can be adjusted by screwing or unscrewing the butterfly nut, so that the water yield is controlled.
The hole that sprays of above-mentioned two kinds of watering nozzles has adopted the structure in porous and rectangular hole respectively, but no matter the hole that sprays that adopts any kind of structure, present sanitation car all has a problem of commonality, the inhomogeneous problem of width coverage within range water volume distribution behind the watering operation (especially back watering operation) promptly, the main performance is the ground drying speed inconsistent behind the watering operation, influences the effect that the watering operation looked and felt and back watering dust fall. This is because the water distribution situation in the present structure sanitation car watering coverage specifically is: more water is distributed in an area with the width of about 1 meter of the center line of the advancing direction of the sanitation truck, the position is the lapping position of the two water spraying nozzles, and the larger the lapping degree is, the more the water is; during operation, the water quantity in the area with the width of 2-3 m behind each of the two water spraying nozzles is small, and the reason is that the water spraying angle of the fan-shaped water outlets in the unit width of the area is small, the water quantity distribution is small, and the ground is dried quickly.
The uneven direct problem that brings of water distribution in width coverage behind the operation of watering behind the sanitation is that, the less region of spraying water can quick drying after spraying the operation, needs the frequent operation that circulates of sanitation car, and the more region of spraying number often sprays the operation fashion and not completely dry next time, has caused the waste to water.
Related researches specially aiming at improving and improving the rear sprinkling uniformity of a road cleaning vehicle are not available in the prior art.
Disclosure of Invention
The invention aims to provide a water spraying nozzle for a sanitation vehicle, which aims to solve the problem of uneven water distribution in the water spraying coverage range of the existing sanitation vehicle.
Meanwhile, the invention also aims to provide the sanitation vehicle using the water spraying nozzle.
The water spraying nozzle for the sanitation vehicle adopts the following technical scheme:
sprinkler nozzle for sanitation vehicle, which comprises a housin, be equipped with on the casing and spray the hole, spray the hole and spray the hole including main spraying hole and compensation, spray the scope and spray the scope part overlap of spraying in hole with main spraying for the compensation is mainly sprayed the hole and is sprayed the water yield in the relatively less region of back water distribution.
Because the compensation spraying holes are arranged above and/or below the main spraying holes, the spraying range of the compensation spraying holes is partially overlapped with the spraying range of the main spraying holes and used for compensating the water amount of the area with relatively less water amount distribution after the main spraying holes are sprayed, so that the target spraying area of the sanitation vehicle can obtain approximately equal water amount, and the problem that the water amount in the spraying coverage range of the existing sanitation vehicle is uneven in distribution is solved.
Still further, the main spray holes and/or the compensation spray holes are scalloped holes. The fan-shaped hole has the advantage of being convenient for process, can form the water curtain of even thickness moreover, helps the homogeneity that the sanitation car sprayed more.
Further, the height of the fan-shaped holes is 1mm-2 mm.
Further, the spraying angle of the main spraying hole is 120-160 deg.
Further, the overlap angle of the compensation spraying hole and the spraying range of the main spraying hole is 40-60 degrees.
Still further, the housing includes a nozzle seat and a nozzle head, the main spray orifice and the compensation spray orifice are disposed on the nozzle head, and the nozzle seat and the nozzle head are detachably connected to each other so that the nozzle head can be angularly adjusted about a vertical axis. The shell is designed into a structure of a nozzle seat and a nozzle head, the nozzle seat is detachably connected with the nozzle head, the nozzle head can be adjusted around a vertical axis, and therefore the set spraying range of the water spraying nozzle for the sanitation truck can be conveniently adjusted.
Further, the nozzle seat and the nozzle head are detachably connected through bolts. The bolt connection has the functions of convenient loosening and fastening, and is more convenient for adjusting the spraying range.
Furthermore, the nozzle seat is provided with threads for connecting with corresponding pipelines or valves on the pipelines. The screw thread on the nozzle seat can provide convenience for the installation of the water spraying nozzle for the sanitation vehicle.
The sanitation truck adopts the following technical scheme:
sanitation car, including chassis, water storage tank and watering device, watering device includes the watering nozzle, and the watering nozzle divide into left watering nozzle and right watering nozzle, the watering nozzle includes the casing, be equipped with on the casing and spray the hole, spray the hole and spray the hole including main spraying hole and compensation, spray the scope and spray the scope part overlap of spraying in hole with the main spraying for the compensation is mainly sprayed the hole and is sprayed the water yield of the relatively less region of back water distribution.
Still further, the main spray holes and/or the compensation spray holes are scalloped holes.
Further, the height of the fan-shaped holes is 1mm-2 mm.
Further, the spraying angle of the main spraying hole is 120-160 deg.
Further, the overlap angle of the compensation spraying hole and the spraying range of the main spraying hole is 40-60 degrees.
Still further, the housing includes a nozzle seat and a nozzle head, the main spray orifice and the compensation spray orifice are disposed on the nozzle head, and the nozzle seat and the nozzle head are detachably connected to each other so that the nozzle head can be angularly adjusted about a vertical axis.
Further, the nozzle seat and the nozzle head are detachably connected through bolts.
Furthermore, the nozzle seat is provided with threads for connecting with corresponding pipelines or valves on the pipelines.
Furthermore, the spraying area formed by the main spraying holes is 30-60 degrees towards the middle of the vehicle, and the rest of the spraying area faces the outside of the vehicle.
The sanitation vehicle has the beneficial effects brought by the nozzle, so the beneficial effects can refer to the beneficial effects of the technical scheme of the nozzle, and are not repeated herein.
Drawings
FIG. 1 is a view illustrating a state of use of one embodiment of a nozzle for a sanitation vehicle according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural view of the nozzle for the sanitation vehicle of FIG. 1;
fig. 4 is a schematic view of a spray range of the nozzle for the sanitation vehicle of fig. 1 in use.
In the figure: 11-nozzle holder, 12-nozzle head, 121-main spray hole, 122-compensation spray hole, 13-fastening bolt, 14-sealing gasket, 15-flange, 16-valve, 17-locking nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, shall fall within the protection scope of the invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Within a period of time after the sanitation vehicle is subjected to post-sprinkling operation, the condition of inconsistent drying speed and speed can occur in the operation coverage range, and the reason is caused by the fact that the water quantity in the post-sprinkling coverage range is not uniformly distributed. Specifically, at present, the rear water spraying and dust falling operation of a road cleaning vehicle is finished by two nozzles on the left side and the right side of the road cleaning vehicle, taking the water outlet of each nozzle as a fan shape as an example, the spraying range of each nozzle is approximately fan-shaped, the middle position in the left and right direction of the vehicle is overlapped due to the overlapping of the spraying ranges of the two nozzles, the overlapping degree of water quantity is large, the water quantity is more, the drying is slow, and the width of the area is about 1m in the actual work; in the prior art, a single fan-shaped water outlet of each nozzle is a slit with the same height, the water quantity of the unit width of the non-overlapped part and the fan-shaped arc length corresponding to the operation width are in a linear relation in the sprinkling range, two areas with the width of about 2-3 m corresponding to the fan-shaped arc length are respectively arranged on the inner sides of the certain width range right behind the two nozzles during the later sprinkling operation, the fan-shaped arc length is obviously less than that of other areas, namely the water quantity in the areas is less, and the areas can be dried in a short time after being sprayed. This results in the middle of the working range being wet at a position of about 1m width, and both sides being rapidly dried in the sun at a 2-3 m wide area, and then the sides still being wet due to the gradually increased amount of water per unit width. The present invention is proposed based on the above-mentioned phenomenon, and it is desirable to compensate the water amount in the fast drying area by providing a compensation spraying hole, so as to avoid the above-mentioned problems.
The features and performance of the sprinkler nozzle for sanitation vehicle according to the present invention will be described in further detail with reference to the embodiments.
As shown in fig. 3, the main components of the sprinkler nozzle for a sanitation vehicle are a housing including a nozzle holder 11 and a nozzle head 12.
The outer contour shape of the nozzle holder 11 is divided into two sections, one section is cylindrical, the other section is hexagonal, the whole length of the section with the cylindrical outer contour is shorter, and a cavity is arranged in the section with the cylindrical outer contour. The section with the cylindrical outer contour is provided with a threaded hole, the threaded hole is used for being connected with other accessories (a valve in the embodiment, and pipelines in other embodiments) and is arranged back to back with the cavity, a blocking wall for separating the threaded hole and the cavity is formed between the threaded hole and the cavity, and the central part of the blocking wall is provided with a connecting hole which is used for being matched with a fastening bolt 13 through a bolt.
The nozzle head 12 is in a cylindrical shape with an open end, the casing is provided with spraying holes, in this embodiment, the spraying holes are arranged on the peripheral wall of the nozzle head (in other embodiments, spraying holes of a spray pipe and the like arranged on the casing can be also used), the spraying holes comprise a main spraying hole 121 and a compensation spraying hole 122, in this embodiment, the compensation spraying hole 122 is arranged above the main spraying hole 121 (in other embodiments, the compensation spraying hole can be arranged below the main spraying hole or above and below the main spraying hole respectively, or the compensation spraying hole is arranged at the same height as the main spraying hole, the purpose of compensating the water amount in an area with relatively small water amount distribution after the main spraying hole 121 sprays is achieved by setting the spraying angle of the compensation spraying hole, the main spraying hole 121 sprays at 130 degrees, the compensation spraying hole 122 sprays at 40 degrees, the spraying ranges of the two spraying holes overlap at 40 degrees, for example, the nozzle head is arranged at the left rear of a sprinkler, the right boundary of the spraying range of the compensation spraying hole 122 is deviated to the left by 20 ° from the right boundary of the main spraying hole 121. In use, the compensation spray holes 122 are used to compensate for the amount of water in an area where the amount of water is distributed relatively less after being sprayed by the main spray holes 121. Of course, in other embodiments, the spraying angle of the main spraying holes 121 can be set arbitrarily according to the spraying range required, such as 120-160 °; the overlapping angle of the compensation spraying holes 122 and the spraying range of the main spraying holes 121 can also be arbitrarily set according to the requirement, for example, the overlapping angle is set to be 40-60 degrees, so that the compensation spraying holes 122 can compensate the water amount of the area with relatively less water distribution after the main spraying holes 121 spray. The main spraying hole 121 and the compensation spraying hole 122 may also be circular holes, and the spraying range of the spraying holes refers to a range that can be sprayed together after a plurality of spraying holes are arranged.
The open end of the nozzle head 12 corresponds to the open end of the cylindrical outer contour of the nozzle holder 11, and a gasket 14 is provided at the interface between the two to prevent water leakage. The fastening between the nozzle head 12 and the nozzle holder 11 is realized by means of a fastening bolt 13, the fastening bolt 13 is mounted at the sealing end of the nozzle head 12 and is in threaded fit with a connecting hole on the nozzle holder 11, and waterproof glue can be coated on the fastening bolt 13 in order to realize the sealing of the matching part of the fastening bolt 13 and the nozzle holder 11. Since the main spray holes 121 and the compensation spray holes 122 are fixed by the fastening bolts 13 in the above-described manner, the adjustment of the spray range of the main spray holes 121 and the compensation spray holes 122 can be achieved by loosening or tightening the fastening bolts 13.
Fig. 1-2 show the use of the above-described nozzle for a sanitation vehicle. As shown in fig. 1-2, when in use, the water spraying nozzles of the present embodiment are respectively disposed on the left and right sides of the rear water spraying pipeline at the rear portion of the sanitation truck, and the rear water spraying pipeline is formed by connecting a plurality of management pipes through flanges 15 (or welding in other embodiments). Based on the view angle shown in fig. 1, the left sprinkling nozzle is positioned on the left side of the two sprinkling nozzles, the right sprinkling nozzle is positioned on the right side of the two sprinkling nozzles, and the left sprinkling nozzle and the right sprinkling nozzle are arranged in a bilateral symmetry mode. A valve 16 is arranged between the water spraying nozzle and the water spraying pipeline, the valve 16 can be an electromagnetic valve to realize remote control, or a manual valve to realize field operation, and the valve 16 is fixed through a locking nut 17. Fig. 3 shows the spraying range of the nozzle for sanitation vehicle, in the spraying operation, the spraying angle of 130 ° of the main spraying hole 121 is equivalent to the spraying angle of the original spraying hole, thereby reducing the overlapping degree of the spraying ranges of the left and right spraying nozzles in the middle, the spraying angle of each spraying nozzle faces to the inner side of the vehicle by 30 ° (in other embodiments, 30 ° -60 ° is feasible according to actual requirements), and faces to the outer side of the vehicle by 100 °, and the water quantity of the area with the middle width of about 1m in the vehicle operation range can be reduced; the compensation spraying holes 122 are all overlapped in the spraying range of the main spraying holes 121 at the spraying angle of 40 degrees, the spraying angle of the compensation spraying holes 122 is 10 degrees towards the inner side of the vehicle and 30 degrees towards the outer side of the vehicle, namely the spraying areas corresponding to the water outlet overlapped parts at the two sides are 2-3 m in width, and the compensation spraying holes 122 compensate the water quantity in the width area, so that the water quantity in the area is basically consistent with the water quantities in other areas. As shown in figure 4, the water distribution in the whole operation range is relatively uniform, the road surface drying speed is basically consistent in a period of time after the road cleaning vehicle operates, the watering and dust-settling effect of the road cleaning vehicle is improved, the efficiency of watering work is improved, and the secondary watering operation on the operation road surface in a short time is avoided.
Embodiment of sanitation car: this sanitation car includes automobile body, water storage tank, the water pump of being connected with the delivery port of water storage tank and the watering device of being connected with the water pump, and watering device includes the watering nozzle, wherein the watering nozzle is the watering nozzle for sanitation car in above-mentioned embodiment, and its mounting means can refer to fig. 1 and fig. 4, and the here is not repeated.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (9)
1. The water spraying nozzle for the sanitation vehicle comprises a shell, wherein the shell is provided with spraying holes, and the water spraying nozzle is characterized in that the spraying holes comprise a main spraying hole and a compensation spraying hole, the shell comprises a nozzle seat and a nozzle head, the main spraying hole and the compensation spraying hole are both arranged on the peripheral wall of the nozzle head, the compensation spraying hole is arranged above the main spraying hole, or the compensation spraying hole is arranged below the main spraying hole, or the compensation spraying holes are respectively arranged above and below the main spraying hole, and the compensation spraying hole and the main spraying hole are arranged in an overlapped mode in the circumferential direction of the nozzle head; the spraying range of the compensation spraying hole is partially overlapped with the spraying range of the main spraying hole and is used for compensating the water amount of an area with relatively less water amount distribution after the main spraying hole sprays water; the nozzle seat and the nozzle head are detachably connected, so that the nozzle head can be angularly adjusted around a vertical axis.
2. The sanitation vehicle sprinkler nozzle of claim 1, wherein the main spray aperture and/or the offset spray aperture is a fan-shaped aperture.
3. The water spray nozzle for sanitation vehicle as claimed in claim 2, wherein the height of the fan-shaped hole is 1mm to 2 mm.
4. The sprinkler nozzle for sanitation vehicle of any one of claims 1 to 3, wherein a spraying angle of said main spraying hole is 120 ° to 160 °.
5. A sprinkler nozzle for a sanitation vehicle according to claim 3, wherein the overlap angle of the spraying range of the compensation spraying hole and the main spraying hole is 40 ° -60 °.
6. The water spray nozzle of claim 1, wherein the nozzle holder and the nozzle head are detachably connected by bolts.
7. The water spray nozzle of claim 1, wherein the nozzle seat is provided with threads for connecting to a corresponding pipe or a valve on the pipe.
8. The sanitation vehicle comprises a chassis, a water storage tank and a water spraying device, wherein the water spraying device comprises a left water spraying nozzle and a right water spraying nozzle, and the left water spraying nozzle and the right water spraying nozzle are the water spraying nozzles for the sanitation vehicle as claimed in any one of claims 1 to 7 and are symmetrically arranged in the left and right directions.
9. The sanitation vehicle of claim 8, wherein said main spray holes form a spray area having an angle of 30 ° to 60 ° towards the center of the vehicle and the remainder towards the outside of the vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010867380.4A CN112007767B (en) | 2020-08-25 | 2020-08-25 | Water spraying nozzle for sanitation vehicle and sanitation vehicle |
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| CN202010867380.4A CN112007767B (en) | 2020-08-25 | 2020-08-25 | Water spraying nozzle for sanitation vehicle and sanitation vehicle |
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| CN112007767A CN112007767A (en) | 2020-12-01 |
| CN112007767B true CN112007767B (en) | 2022-05-13 |
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| CN202010867380.4A Active CN112007767B (en) | 2020-08-25 | 2020-08-25 | Water spraying nozzle for sanitation vehicle and sanitation vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115467278A (en) * | 2021-06-11 | 2022-12-13 | 中车眉山车辆有限公司 | Sprinkler with adjustable water flow coverage width |
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