Mixing and spraying device for indoor building construction
By designing a mixing spray device for the paint mixing mechanism and spraying components, the problems of uneven coating mixing and complex surface spraying are solved, and efficient and uniform coating spraying effect is achieved.
Patent Information
- Application Number
- CN202422491802.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Traditional coating spraying methods are inefficient, the coating ratio is inaccurate, making it difficult to ensure the mixing uniformity of multi-component or high-viscosity coatings, and the spraying needs of complex surfaces and corners are ignored.
A hybrid spraying device including a coating mixing mechanism and a spraying assembly is designed. The coating mixing mechanism realizes full mixing of the coating through bidirectional spiral blades and spoiler components. The spraying assembly provides multi-angle spraying capability to meet the spraying needs of complex surfaces.
It improves the uniformity and efficiency of paint mixing, ensures accurate coating ratio and all-round spraying, adapts to the spraying needs of various complex surfaces and corners, and reduces operational difficulty and paint waste.
Smart Images

Figure CN223214904U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of building construction technology equipment, in particular to a mixing spraying device for indoor building construction. Background Art
[0002] With the rapid development of my country's economy and the advancement of urbanization, the interior construction industry has experienced unprecedented growth. Paint spraying is a crucial decorative step in construction, and its quality is directly related to the aesthetics of the indoor environment and the comfort of living. However, traditional paint spraying methods often rely on manual operation, which is not only inefficient but also difficult to ensure the accuracy of paint ratios, resulting in uneven coating quality. Furthermore, paint waste and environmental pollution are also receiving increasing attention. Therefore, how to improve the efficiency, quality, and environmental performance of interior construction spraying has become an urgent issue for the industry.
[0003] For example, Chinese patent CN219952579U discloses a green building construction indoor spraying device, including a spraying mounting seat, a paint cleaning assembly provided above the spraying mounting seat, the paint cleaning assembly including a mixing barrel with a stirring fan blade movably connected thereto, a uniform coating assembly provided on one side of the paint cleaning assembly, and a coating lifting assembly provided on one side of the uniform coating assembly, which facilitates uniform coating of the wall surface with paint, reduces paint loss, improves stability in use, and is easy to use. However, the above-mentioned green building construction indoor spraying device has the following shortcomings in actual application: First, the device only uses a simple stirring fan blade to mix the paint. This single stirring method is difficult to ensure sufficient mixing of the paint, especially for multi-component or high-viscosity paints. Simple stirring may lead to uneven mixing, affecting the final coating quality; second, the device only considers uniform coating and ignores the consideration of spraying on complex surfaces and corners. In actual indoor building construction, it is often necessary to deal with various irregular surfaces and hard-to-reach areas, and its practicality is poor.
[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content
[0005] (1) Technical problems solved
[0006] In response to the deficiencies in the prior art, the utility model provides a mixing spraying device for indoor building construction, which has the advantages of ensuring sufficient mixing of the various components of the paint, greatly improving the mixing effect and efficiency, and providing multi-angle and all-round spraying capabilities, thereby solving the problem that for multi-component or high-viscosity paints, simple stirring may lead to uneven mixing, affecting the final coating quality, and neglecting the consideration of spraying on complex surfaces and corners. In actual indoor building construction, it is often necessary to deal with various irregular surfaces and hard-to-reach areas.
[0007] (2) Technical solution
[0008] In order to achieve the above-mentioned advantages of ensuring sufficient mixing of the various components of the coating, greatly improving the mixing effect and efficiency, and providing multi-angle and all-round spraying capabilities, the specific technical solutions adopted by the utility model are as follows:
[0009] A mixing spraying device for indoor building construction includes a spraying vehicle body, universal wheels are provided at both ends of the bottom end of the spraying vehicle body, a paint mixing mechanism is provided on one side of the top end of the spraying vehicle body, and a paint feeding assembly is provided on the top end of the paint mixing mechanism, a discharge pump connected to the paint mixing mechanism is provided on the other side of the top end of the spraying vehicle body, a feeding hose is provided on the top end of the discharge pump, and a spraying assembly is provided on one end of the feeding hose.
[0010] Furthermore, in order to achieve multi-directional paint flow during the stirring process, break the laminar state of the paint, create a complex paint flow path, and greatly improve the mixing uniformity, the paint mixing mechanism includes a paint mixing box arranged on the top side of the spray vehicle body, and a discharge port connected to the discharge pump is provided on one side of the paint mixing box. A drive shaft is provided on the inner side of the paint mixing box, one end of the drive shaft is fixedly connected to the output shaft of the drive motor, a first stirring blade is provided on the outer side of one end of the drive shaft, and a second stirring blade is provided on the outer side of the other end of the drive shaft, and the spiral directions of the first stirring blade and the second stirring blade are opposite, and the surfaces of the first stirring blade and the second stirring blade are both penetrated by a plurality of flow interference components; the flow interference component includes a mounting block provided on the surface of the first stirring blade, the cross-section of the mounting block is set to be triangular, and the top of the mounting block is provided with a plurality of staggered conical flow interference blocks, the outer side of the conical flow interference block is provided with a plurality of flow interference holes, and the bottom end of the conical flow interference block is provided with an overflow hole through the mounting block.
[0011] Furthermore, in order to make the addition of paint simple and direct, the operator can easily pour paint of different components into the paint mixing mechanism. The paint feeding assembly includes a square feed port arranged at the top of the paint mixing mechanism, a feed hopper is provided at the top of the square feed port, a top plate is provided at the top of the feed hopper, and pouring pipes are provided on both sides of the top of the top plate.
[0012] Furthermore, in order to provide accurate, uniform, and multi-angle spraying capabilities and significantly improve the spraying quality and efficiency of indoor building construction, the spraying assembly includes a spray gun arranged at one end of a feeding hose, a safety ring is provided on the top end of the spray gun, a paint spray outlet is provided on one side of the top end of the spray gun, a spray shell is provided on the outer side of the paint spray outlet, a threaded groove matching the spray shell is provided on the outer side of the paint spray outlet, a plurality of friction grooves are provided on the outer side of the spray shell, an arc-shaped portion is provided at one end of the spray shell, a plurality of first spray holes arranged in a circle are provided on the outer side of the top end of the arc-shaped portion, and a plurality of second spray holes are provided on the outer side of the bottom end of the arc-shaped portion.
[0013] (3) Beneficial effects
[0014] Compared with the prior art, the present invention provides a mixed spraying device for indoor building construction, which has the following beneficial effects:
[0015] (1) The structure of the utility model is reasonable and reliable. The spraying vehicle body is equipped with universal wheels to improve the maneuverability of the device, which is convenient for flexible movement in complex indoor construction environments. At the same time, the paint mixing mechanism and the paint feeding assembly on the top are closely matched to ensure the accurate proportioning and uniform mixing of the paint. In addition, the design of the discharge pump and the feeding hose realizes the stable delivery of the paint, and the spraying assembly meets the spraying needs of various complex surfaces. This integrated design not only improves the construction efficiency, but also greatly reduces the difficulty of operation, so that even inexperienced operators can easily complete high-quality spraying work.
[0016] (2) By setting up a paint mixing mechanism and a paint feeding assembly, efficient mixing of different components of paint raw materials is achieved. The double-tube design of the paint feeding assembly allows different paint components to be added at the same time, and the unique bidirectional spiral blade design in the paint mixing mechanism, combined with the innovative spoiler assembly, creates a complex paint flow path, generates strong shear force and turbulence, and ensures that the various components of the paint are fully integrated; this not only significantly improves the mixing efficiency, but also effectively prevents the sedimentation of heavy components in the paint, ensures the uniformity of the paint, and lays a solid foundation for high-quality spraying construction.
[0017] (3) By setting up a spraying assembly, precise, multi-angle, and all-round spraying capabilities are provided. The spray gun ensures the precise output of the paint, and the adjustable spray shell increases the flexibility of spraying. In particular, the design of the arc part, combined with multiple spray holes at the top and bottom, enables the device to adapt to the spraying needs of various complex surfaces and corners in indoor construction; the circularly arranged spray holes ensure the uniform distribution of the paint, improve the consistency and quality of the coating, and at the same time, the detachable design of the spray shell facilitates cleaning and maintenance, extending the service life of the equipment. This innovative spraying assembly design improves the efficiency and quality of spraying, and also reduces paint waste and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a schematic structural diagram of a mixing spraying device for indoor building construction according to an embodiment of the present utility model;
[0020] Figure 2 This is a schematic structural diagram from another angle of the mixing spray device for indoor building construction according to an embodiment of the present utility model;
[0021] Figure 3 This is a partial structural diagram of a paint feeding assembly in a mixing spraying device for indoor building construction according to an embodiment of the present utility model;
[0022] Figure 4 This is a partial structural diagram of a paint mixing mechanism in a mixing spraying device for indoor building construction according to an embodiment of the present utility model;
[0023] Figure 5 This is a partial structural diagram of a coating mixing mechanism in a mixing spraying device for indoor building construction according to an embodiment of the present invention, from another angle;
[0024] Figure 6 This is a partial structural diagram of a spoiler assembly in a mixing spraying device for indoor building construction according to an embodiment of the present utility model;
[0025] Figure 7 This is a schematic diagram of the partial structure of the spraying assembly in the mixed spraying device for indoor building construction according to an embodiment of the utility model;
[0026] Figure 8 It is a structural schematic diagram of a spray shell in a mixing spray device for indoor building construction according to an embodiment of the utility model.
[0027] In the picture:
[0028] 1. Spraying vehicle body; 2. Universal wheel; 3. Paint mixing mechanism; 301. Paint mixing box; 302. Discharge port; 303. Drive shaft; 304. Drive motor; 305. First stirring blade; 306. Second stirring blade; 307. Turbine assembly; 3071. Mounting block; 3072. Conical spoiler block; 3073. Turbine hole; 3074. Overflow hole; 4. Paint feed assembly; 401. Square feed port; 402. Feed hopper; 403. Top plate; 404. Dump pipe; 5. Discharge pump; 6. Feed hose; 7. Spraying assembly; 701. Spray gun; 702. Safety hanging ring; 703. Paint spray port; 704. Spray shell; 705. Threaded groove; 706. Friction groove; 707. First spray hole; 708. Second spray hole; 8. Safety hook DETAILED DESCRIPTION
[0029] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0030] According to an embodiment of the present utility model, a mixing spraying device for indoor building construction is provided.
[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figures 1-8 As shown, according to an embodiment of the utility model, a mixing spraying device for indoor building construction includes a spraying vehicle body 1, and universal wheels 2 are provided at both ends of the bottom end of the spraying vehicle body 1, and a paint mixing mechanism 3 is provided on one side of the top of the spraying vehicle body 1 (in addition, in specific applications, a control panel is provided on one side of the paint mixing mechanism 3, and the drive motor 304 and the discharge pump 5 are electrically connected in sequence through the control panel. This is the prior art and will not be elaborated on here), and a paint feeding assembly 4 is provided on the top of the paint mixing mechanism 3, and a discharge pump 5 connected to the paint mixing mechanism 3 is provided on the other side of the top of the spraying vehicle body 1, and a feeding hose 6 is provided on the top of the discharge pump 5, and a spraying assembly 7 is provided at one end of the feeding hose 6.
[0032] In addition, in specific applications, a U-shaped handrail is provided on one side of the top of the spraying vehicle body 1, and a safety hook 8 that cooperates with the safety hanging ring 702 is fixedly provided on the top of one side of the U-shaped handrail.
[0033] With the help of the above-mentioned technical solution of the utility model, the structure of the utility model is reasonable and reliable. Through the close cooperation between the paint mixing mechanism 3 and the paint feeding component 4, multi-directional paint flow is generated during the stirring process, breaking the laminar state of the paint, creating a complex paint flow path, and greatly improving the mixing uniformity. In combination with the spraying component 7, it can meet the spraying needs of various complex surfaces in indoor construction.
[0034] In one embodiment, for the paint mixing mechanism 3, the paint mixing mechanism 3 includes a paint mixing box 301 arranged on one side of the top end of the spray vehicle body 1, and a discharge port 302 connected to the discharge pump 5 is provided on one side of the paint mixing box 301, and a drive shaft 303 is provided on the inner side of the paint mixing box 301 (in addition, in specific applications, both ends of the drive shaft 303 are connected to the paint mixing box 301 through bearings), one end of the drive shaft 303 is fixedly connected to the output shaft of the drive motor 304 (in addition, in specific applications, the drive motor 304 is set as a servo motor), a first stirring blade 305 is sleeved on the outer side of one end of the drive shaft 303 (in addition, in specific applications, the first stirring blade 305 and the second stirring blade 306 are fixedly connected to the drive shaft 303), and the outer side of the other end of the drive shaft 303 A second stirring blade 306 is provided, and the spiral directions of the first stirring blade 305 and the second stirring blade 306 are opposite, and the surfaces of the first stirring blade 305 and the second stirring blade 306 are penetrated by a flow interference component 307; the flow interference component 307 includes a mounting block 3071 which is penetrated on the surface of the first stirring blade 305, and the cross-section of the mounting block 3071 is set to be triangular, and the top of the mounting block 3071 is provided with a plurality of staggered conical flow interference blocks 3072, and the outer side of the conical flow interference block 3072 is provided with a flow interference hole 3073, and the bottom end of the conical flow interference block 3072 is penetrated by the mounting block 3071 to provide an overflow hole 3074, thereby realizing multi-directional paint flow during the stirring process, breaking the laminar state of the paint, creating a complex paint flow path, and greatly improving the mixing uniformity.
[0035] The working principle of the paint mixing mechanism 3 is as follows: after the paint raw materials enter the paint mixing box 301 from the paint feeding assembly 4, the drive shaft 303 is driven to rotate by starting the drive motor 304, and the drive shaft 303 drives the fixedly connected first stirring blade 305 and the second stirring blade 306 to rotate at the same time. Since the spiral directions of the first stirring blade 305 and the second stirring blade 306 are opposite, the paint is driven to flow in the paint mixing box 301. The rotational motion of the blades generates turbulence in the paint. This turbulent state greatly promotes the mixing between different components. At the same time, the reverse motion of the two sets of blades generates a strong shear force, which effectively prevents the color particles or heavier components in the paint from settling, ensures that the components are fully dispersed, avoids the occurrence of dead corners in the paint mixing box 301, and ensures that each part of the paint is fully mixed.
[0036] In addition, the design of the spoiler component 307 greatly enhances the spoiler effect of the paint. The triangular cross-section of the mounting block 3071 and the staggered arrangement of the conical spoiler block 3072 can generate multi-directional paint flow during the stirring process, break the laminar state of the paint, and promote the full mixing of different components. The spoiler holes 3073 on the surface of the conical spoiler block 3072 and the overflow holes 3074 at the bottom are designed to further enhance the mixing effect of the paint. These holes can generate small-scale eddies to promote the full mixing of the paint. The design of the entire paint mixing mechanism 3 helps to prevent the precipitation of particles or heavier components in the paint and maintain the uniformity of the paint, thereby significantly improving the efficiency of paint mixing, reducing mixing time, and improving overall construction efficiency.
[0037] In one embodiment, for the paint feeding assembly 4, the paint feeding assembly 4 includes a square feed port 401 arranged at the top of the paint mixing mechanism 3, a feed hopper 402 is provided at the top of the square feed port 401, a top plate 403 is provided at the top of the feed hopper 402, and pouring pipes 404 are provided on both sides of the top of the top plate 403, so that the addition of paint becomes simple and direct, and the operator can easily pour paints of different components into the paint mixing mechanism 3.
[0038] The working principle of the paint feeding assembly 4 is as follows: the design of the square feed port 401 and the feed hopper 402 makes the addition of paint simple and direct, and the operator can easily pour the paint into the mixing mechanism. The funnel shape of the feed hopper 402 helps to prevent the paint from splashing during the pouring process, reducing material waste and environmental pollution. The two pouring pipes 404 set on the top plate 403 allow different paint components to be added at the same time, which is particularly useful for indoor construction construction that requires on-site mixing of multiple components of paint; the top plate 403 realizes a closed feeding design to prevent dust and impurities from entering the paint mixing mechanism 3, maintaining the cleanliness of the paint. The design of the square feed port 401 is suitable for paints of various viscosities, and both liquid and viscous paints can enter smoothly. The design of the double pouring pipes 404 helps to evenly deliver the paint components, laying the foundation for the subsequent paint mixing process.
[0039] In one embodiment, the spray assembly 7 includes a spray gun 701 disposed at one end of the feeding hose 6, a safety ring 702 is provided on the top of the spray gun 701, a paint spray outlet 703 is provided on one side of the top of the spray gun 701, a spray shell 704 is provided on the outer side of the paint spray outlet 703, and a thread groove 705 is provided on the outer side of the paint spray outlet 703 to match the spray shell 704 (in addition, in specific applications, the inner side of the spray shell 704 is provided with a thread that matches the thread groove 705). A number of friction grooves 706 are provided on the outside of the spray shell 704, and an arc-shaped portion is provided at one end of the spray shell 704. A number of first spray holes 707 arranged in a circle are provided on the outside of the top end of the arc-shaped portion, and a number of second spray holes 708 are provided on the outside of the bottom end of the arc-shaped portion (in addition, in specific applications, the diameter of the first spray hole 707 is larger than the diameter of the second spray hole 708), thereby providing accurate, uniform, and multi-angle spraying capabilities, while taking into account the flexibility of use, and significantly improving the spraying quality and efficiency of indoor building construction.
[0040] The working principle of the spray assembly 7 is as follows: the design of the spray gun 701 and the paint spray outlet 703 ensures the precise output of the paint, allowing the operator to control the spraying position and range of the paint. The setting of the safety hanging ring 702 increases the safety of operation, and cooperates with the safety hook 8 to facilitate the hanging and storage of the spray assembly 7 when not in use. The threaded connection design between the spray shell 704 and the paint spray outlet 703 allows the operator to replace the spray shell 704 with different apertures as needed. In a complex indoor environment, the appropriate spray shell 704 can be quickly replaced according to the needs of different surfaces or corners, thereby improving construction efficiency; the friction groove 706 on the outside of the spray shell 704 increases the friction when holding and reduces slippage during operation. The design of the arc portion, combined with the first spray hole 707 at the top and the second spray hole 708 at the bottom, realizes multi-angle and all-round spraying capabilities, which is particularly suitable for painting work on complex surfaces or corners. Among them, the circular arrangement design of the first spray hole 707 ensures the uniform distribution of the paint, which helps to improve the consistency and quality of the painting. The setting of the second spray hole 708 allows for more precise spraying control, which is suitable for areas that require precise painting. The detachable design of the spray shell 704 enables the spray assembly 7 to adapt to different spraying needs. By replacing spray shells of different specifications, the spray hole layout can be adjusted, the paint atomization can be reduced, and different spraying effects can be achieved.
[0041] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.
[0042] In actual application, the spraying vehicle body 1 is first pushed to the construction area, and the position can be easily adjusted through the universal wheel 2. Then the operator adds different paint components to the paint mixing box 301 through the two pouring pipes 404 of the paint feeding assembly 4. After filling the paint mixing box 301, the drive motor 304 is started to drive the drive shaft 303 to rotate, so that the first stirring blade 305 and the second stirring blade 306 start to work. The reverse spiral design of these two sets of blades creates a complex paint flow path. At the same time, the conical spoiler block 3072 of the spoiler assembly 307 further enhances the mixing effect. After the mixing is completed, the drive motor 304 is turned off and the discharge is started. The pump 5 delivers the evenly mixed paint to the spray assembly 7 through the feeding hose 6. The operator holds the spray gun 701 and realizes multi-angle and uniform spraying through the paint spray outlet 703 and the first spray hole 707 and the second spray hole 708 on the spray shell 704. For large areas such as walls, the first spray hole 707 at the top can be mainly used; and for hard-to-reach areas such as corners or edges, the second spray hole 708 at the bottom can be used for fine spraying. This operation method not only ensures uniform mixing and precise spraying of the paint, but also greatly improves construction efficiency and coating quality, and is particularly suitable for various complex indoor construction environments.
[0043] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A mixing spraying device for indoor building construction, comprising a spraying vehicle body (1), characterized in that: Universal wheels (2) are provided at both ends of the bottom of the spraying vehicle body (1), a paint mixing mechanism (3) is provided on one side of the top of the spraying vehicle body (1), and a paint feeding assembly (4) is provided on the top of the paint mixing mechanism (3), a discharge pump (5) connected to the paint mixing mechanism (3) is provided on the other side of the top of the spraying vehicle body (1), a feeding hose (6) is provided on the top of the discharge pump (5), and a spraying assembly (7) is provided on one end of the feeding hose (6); The paint mixing mechanism (3) comprises a paint mixing box (301) arranged on one side of the top end of the spray vehicle body (1); a discharge port (302) connected to the discharge pump (5) is provided through one side of the paint mixing box (301); a drive shaft (303) is provided through the inner side of the paint mixing box (301); one end of the drive shaft (303) is fixedly connected to the output shaft of the drive motor (304); a first stirring blade (305) is provided on the outer side of one end of the drive shaft (303); a second stirring blade (306) is provided on the outer side of the other end of the drive shaft (303); the spiral directions of the first stirring blade (305) and the second stirring blade (306) are opposite; and a flow interference component (307) is provided on the surface of both the first stirring blade (305) and the second stirring blade (306); The spoiler assembly (307) includes a mounting block (3071) that is arranged through the surface of the first stirring blade (305), the cross section of the mounting block (3071) is arranged in a triangular shape, a plurality of staggered conical spoiler blocks (3072) are arranged on the top of the mounting block (3071), a plurality of interfering flow holes (3073) are opened on the outer side of the conical spoiler block (3072), and an overflow hole (3074) is opened at the bottom end of the conical spoiler block (3072) that passes through the mounting block (3071).
2. A mixing spraying device for indoor building construction according to claim 1, characterized in that: The paint feeding assembly (4) comprises a square feed port (401) arranged at the top of the paint mixing mechanism (3); a feed hopper (402) is arranged at the top of the square feed port (401); a top plate (403) is arranged at the top of the feed hopper (402); and pouring pipes (404) are provided on both sides of the top of the top plate (403).
3. A mixing spraying device for indoor building construction according to claim 1, characterized in that: The spray assembly (7) comprises a spray gun (701) arranged at one end of the feeding hose (6), a safety ring (702) being provided on the top end of the spray gun (701), a paint spray outlet (703) being provided on one side of the top end of the spray gun (701), and a spray shell (704) being provided on the outer side of the paint spray outlet (703).
4. A mixing spraying device for indoor building construction according to claim 3, characterized in that: The outer side of the paint spray outlet (703) is provided with a threaded groove (705) that matches the spray shell (704), the outer side of the spray shell (704) is provided with a plurality of friction grooves (706), one end of the spray shell (704) is provided with an arc portion, the outer side of the top end of the arc portion is provided with a plurality of first spray holes (707) arranged in a circumferential manner, and the outer side of the bottom end of the arc portion is provided with a plurality of second spray holes (708).
Citation Information
Patent Citations
Indoor spraying device for green building construction
CN219952579U