Powder profiling and quantitative spreading device for adapting the surface of a concavo-convex concrete base

Abstract

The utility model relates to the field of building base surface powder spreading equipment, concretely relates to a powder profiling quantitative spreading device suitable for concave-convex concrete base surface, the lower end of the discharge pipe of bin is equipped with at least one floating scraper assembly, the floating scraper assembly includes the positioning plate and the scraper that set respectively in the front and back two sides of the forward direction of discharge pipe, the positioning plate and the scraper fixed connection and can move up and down along the discharge pipe, the positioning plate is used for abutting the concrete base surface, the longitudinal distance with the preset between the scraper lower end surface and the positioning plate lower end surface has. The floating scraper assembly of the utility model can lift and lower along with the fluctuation of base surface, scrape the powder, solved the problem that the powder of conventional spreading machine discharge height fixed meets concave-convex base layer accumulation or leaks, thickness uneven.

Description

Technical Field

[0001] This utility model relates to the field of equipment for spreading powder on building base surfaces, specifically to a powder conformal quantitative spreading device adapted to uneven concrete base surfaces. Background Technology

[0002] Cement-based penetrating crystalline waterproof coatings are core materials in underground engineering waterproofing systems. Among them, MATE-EXC ultrafine waterproof powder, as a new generation of high-performance products, relies on the characteristic of active crystalline components penetrating and growing into the capillary pores of concrete. It can achieve self-repair in minute cracks within 0.4mm and is fully compatible with the dry-spreading construction process of large-area base surfaces such as building foundations and post-pouring strips. It is a key technical path to improve the waterproofing durability of underground structures.

[0003] The core advantage of dry-spreading technology lies in the elimination of on-site slurry mixing. Dry powder can be directly and evenly spread onto the substrate before the concrete initially sets. Subsequently, the moisture in the surface concrete naturally triggers a crystallization reaction, avoiding problems such as uneven coating thickness and insufficient adhesion to the substrate that are common with traditional brushing processes. Construction efficiency is increased by more than 40% compared to wet methods, and it has been gradually promoted in large-scale infrastructure projects in China. However, currently, there is no dedicated dry-spreading equipment specifically developed for this type of ultrafine waterproof powder. Most construction scenarios still rely on manual spreading or general-purpose engineering spreading equipment, which cannot meet the special construction requirements of this type of material.

[0004] The following problems are currently prevalent in the industry: Uncontrolled uniformity of application on uneven substrates: After actual construction, building subgrades typically have a height difference of 5-30mm. When applying the coating manually, workers' walking paths and application force cannot be kept consistent, easily leading to powder accumulation in low-lying areas and missed application in raised areas. Conventional engineering coating machines only use a fixed-height discharge structure and cannot dynamically adjust the application amount according to the undulations of the substrate. This ultimately results in a deviation in the thickness of the waterproof powder coating exceeding ±3mm, with some areas failing to meet the design requirements for dry application, directly affecting the integrity of the subsequent crystallization reaction.

[0005] Ultrafine agglomerated powder blockage failure: MATE series waterproof powder is a highly active ultrafine powder, which is very prone to agglomeration and clumping due to moisture absorption during on-site storage and transportation. Conventional spreading equipment is only equipped with a common screw conveyor structure, which is insufficient to shear and crush agglomerated powder. Large particles of powder that are not completely dispersed can easily cause local discharge port blockage after entering the spreading channel, eventually forming blank areas without material or large particle accumulation points on the base surface, resulting in local waterproof failure and creating hidden dangers for leakage in subsequent projects.

[0006] Open-air construction results in severe dust and powder loss: Traditional open-type spreading structures lack any airtight protective design. Ultrafine powder spills out in large quantities due to natural wind during open-air operations, with on-site dust concentrations far exceeding construction safety standards. At the same time, actual powder loss generally reaches more than 12%, resulting in significant waste of material costs. The scattered dust also pollutes the surrounding steel reinforcement and formwork working surfaces, affecting the quality of subsequent concrete pouring, and does not meet the current environmental protection management requirements for construction sites. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a powder conformal quantitative spreading device that is adapted to uneven concrete base surfaces, thereby overcoming the shortcomings of the existing technology and achieving uniform coverage of the base surface and reducing dispersion loss.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A powder conformal quantitative spreading device adapted to uneven concrete surfaces includes a hopper. The lower end of the feed pipe of the hopper is provided with at least one floating scraper assembly. The floating scraper assembly includes a positioning plate and a scraper respectively disposed on the front and rear sides of the feed pipe in the spreading direction. The positioning plate and the scraper are fixedly connected and can move up and down along the feed pipe. The positioning plate is used to abut against the concrete surface. There is a preset longitudinal distance between the lower end face of the scraper and the lower end face of the positioning plate.

[0009] This configuration allows the floating scraper assembly to rise and fall with the unevenness of the substrate. During operation, the hopper moves forward at a constant speed, and the powder falls between the positioning plate and the scraper. The positioning plate contacts the concrete substrate at the front, while the scraper smooths the powder from behind. When encountering a raised surface, the positioning plate is pushed upwards along the lower end of the discharge pipe, simultaneously causing the scraper to rise. When encountering a recessed surface, the positioning plate, due to its own weight, moves downwards to contact the substrate, causing the scraper to move downwards synchronously. Because there is a preset longitudinal distance between the lower end of the scraper and the lower end of the positioning plate, corresponding to the required powder thickness, there is always a gap between the scraper and the substrate, even on uneven surfaces, ensuring the powder is smoothed. When multiple floating scraper assemblies are used, this device can adapt to more complex working conditions: when encountering localized raised or recessed areas, the corresponding floating scraper assembly automatically rises and falls, smoothing the powder in these areas as well.

[0010] Furthermore, it also includes a material feeding control component driven and connected by the floating scraper assembly. Since the surface area of ​​the uneven surface is larger than the area of ​​the corresponding flat surface, when the hopper moves forward at a constant speed, the feeding amount needs to be increased to better cover the uneven base surface. Therefore, this utility model sets up a material feeding control component driven by the floating scraper assembly to solve this problem. When encountering an uneven base surface, the feeding amount is increased synchronously as the floating scraper assembly moves.

[0011] Furthermore, the feeding control component includes a moving gate and a fixed gate that are horizontally placed inside the feeding tube. The moving gate is fixedly connected to a positioning plate or a scraper. The fixed gate is fixedly arranged on the opposite side of the moving gate and maintains a distance from the moving gate. When the lower end face of the positioning plate is at a horizontal reference plane, the ends of the moving gate and the fixed gate that are close to each other are on the same plane.

[0012] During use, the powder falls through the gap between the moving gate and the fixed gate. The moving gate moves away from the fixed gate as the positioning plate moves up or down, which increases the material discharge gap and thus increases the material discharge amount. This, combined with the scraper, smooths the surface and effectively covers the uneven base with the powder.

[0013] Furthermore, the lower end of the feeding pipe is provided with a longitudinally extending strip-shaped through hole, the positioning plate and the scraper are connected by a connecting rod, the connecting rod passes through the strip-shaped through hole, the moving gate is fixedly connected to the connecting rod, and the fixed gate is provided with a channel that allows the connecting rod to pass through.

[0014] By setting a strip-shaped through-hole, the connecting rod passes through the strip-shaped through-hole, enabling the floating scraper assembly to move stably up and down along the strip-shaped through-hole. In use, when encountering a raised base surface, the positioning plate moves upward due to the resistance of the ground, thereby driving the connecting rod to move upward along the strip-shaped through-hole, further driving the moving gate and scraper to move upward synchronously; when encountering a recessed base surface, the positioning plate slides down due to its own weight, further driving the connecting rod, moving gate and scraper to move downward.

[0015] Furthermore, the hopper is equipped with a screw conveyor mechanism for quantitative feeding. In use, the screw conveyor mechanism quantitatively feeds the powder, matching the uniform forward movement of the hopper, which allows the powder to be evenly distributed on the base surface.

[0016] Furthermore, the silo is divided into three independent storage areas, with the discharge pipes of the three storage areas arranged side by side, and each storage area is equipped with a screw conveyor mechanism. This configuration allows for the activation of one or more screw conveyor mechanisms as needed, accommodating different spreading requirements for strip-shaped post-cast strips and large-area subbase layers.

[0017] Furthermore, it also includes a vibrating screen disposed between the screw conveyor mechanism and the discharge pipe. Since waterproof powder is an ultrafine powder that is extremely prone to agglomeration due to moisture absorption, the vibrating screen can break up and homogenize the agglomerates, ensuring that the powder is evenly distributed without clogging the discharge port.

[0018] Furthermore, it also includes a vehicle body for loading the hopper, the wheels of which are connected to the vehicle frame via shock absorbers. This configuration prevents the floating scraper assembly from lifting off the ground or jumping when the base surface undulates due to the up-and-down movement of the wheels, ensuring good ground contact during scraping operations.

[0019] Furthermore, it also includes a dust collection device, the suction end of which is located around the periphery of the feeding pipe. During open-air operations, a large amount of ultrafine powder may spill out due to natural wind; the dust collection device can effectively recover the spilled powder.

[0020] Furthermore, a flexible baffle is provided around the outer perimeter of the feeding pipe, and the dust suction end is positioned between the flexible baffle and the feeding pipe. The flexible baffle can physically intercept some of the escaped dust, and in conjunction with the use of a vacuum cleaner, a negative pressure space is formed between the flexible baffle and the feeding pipe, which can effectively suck back the escaped powder.

[0021] The beneficial effects of this utility model are: 1. The floating scraper assembly of this utility model can rise and fall with the undulations of the base surface to scrape and level the powder, solving the problems of powder accumulation or missed spreading and uneven powder thickness caused by the fixed material discharge height of conventional spreaders. The positioning plate is located on the front side of the material discharge pipe in the forward direction, abutting against the ground and rising and falling with the ground, driving the scraper fixedly connected to it to rise and fall synchronously, so that the scraper can always maintain a gap with the base surface to scrape the powder level. To adapt to complex and changing terrain conditions, multiple sets of floating scraper assemblies are further arranged along the width direction at the lower end of the material discharge pipe. During operation, when the base surface has local convexity or depression, the floating scraper assembly at the corresponding position rises and falls adaptively according to the shape, and the positioning plate maintains close contact with the base surface throughout the process, which significantly improves the uniformity of the overall powder spreading and leveling operation.

[0022] 2. This utility model achieves automatic adjustment of the discharge rate by setting a floating scraper assembly connected to a discharge control component. When the hopper moves forward at a constant speed, a larger discharge rate is needed to better cover the uneven base surface. The moving gate plate can move away from the fixed gate plate by moving up or down with the positioning plate, thus increasing the discharge gap and thereby increasing the discharge rate. This, combined with the scraper, scrapes the surface level, achieving effective coverage of the powder on the uneven base surface.

[0023] 3. This utility model employs a screw conveyor mechanism to complete the quantitative feeding function, further dividing the silo into three independent quantitative feeding storage areas, adapting to the different spreading amounts under two different working conditions: strip-shaped post-cast strips and large-area cushion layers. The quantitative feeding of the screw conveyor mechanism, combined with the crushing and homogenizing effect of the vibrating screen, ensures stable feeding amount and uniform powder, significantly improving the uniformity of the spreading operation.

[0024] 4. The dust collection device of this utility model can achieve efficient recovery of loose powder. The flexible barrier physically intercepts some of the loose dust, and the vacuum cleaner creates a stable negative pressure space between the flexible barrier and the discharge pipe, which can significantly improve the powder recovery rate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 This is a structural schematic diagram of another embodiment of the present invention, in which the vehicle body is omitted; Figure 3 yes Figure 2 A top-down view of the structure; Figure 4 This is a 3D view of the floating scraper assembly; Figure 5 It is a 3D view of the feed pipe; Figure 6 This is a cross-sectional view of the feed pipe; Figure 7 This is a cross-sectional view of the floating scraper assembly in one state, where the moving gate and the stationary gate are on the same horizontal plane. Figure 8 This is a cross-sectional view of the floating scraper assembly in another state, where the moving gate is below the fixed gate; Figure 9 This is a cross-sectional view of the floating scraper assembly in another state, where the moving gate is above the fixed gate; Figure 10 This is a diagram showing the installation location of the vacuum cleaner. In the diagram: 1. Hopper; 2. Feed pipe; 20. Strip through hole; 3. Floating scraper assembly; 30. Positioning plate; 31. Scraper; 32. Fixed gate; 33. Moving gate; 34. Connecting rod; 4. Dust collection device; 40. Dust collection end; 5. Flexible enclosure; 6. Screw conveyor mechanism; 7. Vibrating screen; 70. Collection box. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] Example 1: like Figure 1 The powder conformal quantitative spreading device adapted to uneven concrete base surface shown includes a hopper 1, and at least one floating scraper assembly 3 is provided at the lower end of the feed pipe 2 of the hopper 1.

[0028] Floating scraper assembly 3, as Figure 4 The diagram shows a positioning plate 30 and a scraper 31 respectively positioned on the front and rear sides of the feeding pipe 2 in the spreading direction. The positioning plate 30 and the scraper 31 are fixedly connected and can move up and down along the feeding pipe 2. The positioning plate 30 is used to abut against the concrete substrate, and there is a preset longitudinal distance between the lower end face of the scraper 31 and the lower end face of the positioning plate 30. The preset longitudinal distance refers to the required powder thickness on the concrete substrate. With this configuration, the floating scraper assembly 3 can rise and fall with the uneven substrate and scrape the spread powder evenly.

[0029] Specifically, the positioning plate 30 and the scraper 31 are assembled on the feed pipe 2 in the form of a sliding pair. Those skilled in the art can implement this using common structural methods. For example, the two ends can be connected and sleeved on the outer wall of the feed pipe 2. Alternatively, a guide groove can be set on the feed pipe 2, and the positioning plate 30 and the scraper 31 can be connected and installed in the groove. As long as the function of the floating scraper assembly 3 can be realized, the up and down movement of the scraper assembly 3 can be achieved. This will not be elaborated here.

[0030] Preferably, a sloping guide structure is provided at the lower end of the positioning plate 30 to decompose the horizontal thrust of the raised base surface into an upward component force, so that the positioning plate 30 can slide upward without jamming when it encounters the raised base surface.

[0031] In this way, the floating scraper assembly 3 can achieve self-adaptation to the base surface solely by its own weight without additional drive: it rises with the shape when contacting a raised base surface, and automatically falls to fit the base surface by its own weight when passing through a recessed area. A compression spring can also be installed between the positioning plate 30 and / or the scraper 31 and the hopper 1 to eliminate the lag gap of the self-weight action, making the follow-up response of the positioning plate 30 more stable and reliable.

[0032] In use, the hopper 1 moves forward at a constant speed, and the powder falls between the positioning plate 30 and the scraper 31. The positioning plate 30 is in front and abuts against the base surface, while the scraper 31 is behind and scrapes the powder flat. When encountering a raised base surface, the positioning plate 30 is pushed up along the lower end of the feed pipe 2, which simultaneously drives the scraper 31 to move up. When encountering a concave base surface, the positioning plate 30 moves down and abuts against the base surface due to its own weight or the action of the compression spring, which simultaneously drives the scraper 31 to move down. In this way, even on an uneven base surface, there is always a gap between the scraper 31 and the base surface, which can scrape the powder flat.

[0033] To adapt to complex and varied terrain conditions, this embodiment arranges multiple sets of floating scraper assemblies 3 along the width direction at the lower end of the feeding pipe 2. During operation, when local bulges or depressions appear on the base surface, the floating scraper assembly 3 at the corresponding position adaptively rises and falls according to the shape, and the positioning plate 30 maintains close contact with the base surface throughout the process, which significantly improves the uniformity of the overall powder spreading and leveling operation.

[0034] Example 2: The surface area of ​​the uneven surface is larger than that of the corresponding flat surface. When the hopper 1 moves forward at a constant speed, the material discharge rate needs to be increased to better cover the uneven base surface. Therefore, this embodiment is equipped with a material discharge control component driven and connected by the floating scraper assembly 3 to solve this problem. The specific structure is as follows: Figures 5 to 9 As shown, the material feeding control component includes a moving gate 33 and a fixed gate 32.

[0035] The movable gate 33 and the fixed gate 32 are horizontally placed inside the feed pipe 2. The movable gate 33 is fixedly connected to the positioning plate 30 or the scraper 31. The fixed gate 32 is fixedly set on the opposite side of the movable gate 33 and maintains a distance from the movable gate 33. When the lower end face of the positioning plate 30 is at the horizontal reference plane, such as Figure 7 As shown, the ends of the moving gate 33 and the fixed gate 32 that are close to each other are on the same plane.

[0036] The powder falls from the gap between the moving gate 33 and the fixed gate 32. The moving gate 33 can move away from the fixed gate 32 as the positioning plate 30 moves up or down, which increases the material discharge gap and thus increases the material discharge amount, achieving effective coverage of the uneven base surface by the powder.

[0037] As an optional specific structure, such as Figure 5 and Figure 7 As shown, the lower end of the feed pipe 2 has a longitudinally extending strip-shaped through hole 20. The positioning plate 30 and the scraper 31 are connected by a connecting rod 34, which passes through the strip-shaped through hole 20. The movable gate plate 33 is fixedly connected to the connecting rod 34, and the fixed gate plate 32 has a channel that allows the connecting rod 34 to pass through. The connecting rod 34 is preferably in the shape of a thin sheet or a filament.

[0038] By setting a strip-shaped through hole 20, the connecting rod 34 passes through the strip-shaped through hole 20, enabling the floating scraper assembly 3 to move stably up and down along the strip-shaped through hole 20. In use, when encountering a raised base surface, the positioning plate 30 moves upward due to the resistance of the ground, thereby driving the connecting rod 34 to move upward along the strip-shaped through hole 20, further driving the moving gate 33 and scraper 31 to move upward synchronously; when encountering a concave base surface, the positioning plate 30 slides down due to its own weight or the action of the compression spring, further driving the connecting rod 34, moving gate 33 and scraper 31 to move downward.

[0039] Example 3: like Figure 2 and Figure 3 As shown, the hopper 1 in this embodiment is equipped with a screw conveyor mechanism 6 for quantitative material feeding. During use, the screw conveyor mechanism 6 feeds the material quantitatively, matching the uniform forward movement of the hopper 1, ensuring the powder is evenly spread on the base surface. The screw discharge speed is adjusted on-site according to the designed spreading thickness. Furthermore, the hopper 1 can be divided into three independent storage areas, with the corresponding discharge pipes 2 arranged side-by-side. Each storage area is equipped with one screw conveyor mechanism 6. This configuration allows for the activation of one or more screw conveyor mechanisms 6 as needed, adapting to different spreading requirements for strip-shaped post-cast strips and large-area subbase layers.

[0040] Preferably, this embodiment also includes a vibrating screen 7 disposed between the screw conveyor mechanism 6 and the discharge pipe 2. To address the issue of powder easily agglomerating after absorbing moisture, the vibrating screen 7 utilizes high-frequency vibration of the screen surface to thoroughly break up the agglomerates, simultaneously homogenizing the material and ensuring uniform distribution of powder across the full width of the screen surface. This eliminates localized agglomeration and prevents blockage at the discharge port. A double-layer eccentric vibrating screen 7 can be selected for two-stage screening to improve the screening effect.

[0041] In use, the aforementioned device is mounted on the vehicle and moves forward at a constant speed. The screw conveyor mechanism 6 operates stably at a preset speed, quantitatively conveying the powder material filled in the hopper 1 to the vibrating screen 7 station. The vibrating screen 7 completes the crushing of lumps and homogenization of powder through high-frequency vibration. A small amount of insufficiently crushed lumps are discharged from the upper layer of the vibrating screen 7 into the collection box 70. The qualified powder material after being screened by the screen is evenly sprinkled onto the base surface along the feed pipe 2, and finally the floating scraper assembly 3 completes the leveling operation.

[0042] Preferably, the wheels of the vehicle body are connected to the frame via shock absorbers. This structure can effectively counteract the up-and-down bumps during the wheel's movement, preventing the floating scraper assembly 3 from lifting off the ground or jumping off when the base surface is uneven, thus ensuring the ground adhesion during scraping operations.

[0043] Example 4: like Figure 10 As shown, this embodiment also includes a dust collection device 4, whose suction end 40 is located around the feed pipe 2. Specifically, a suction pipe can be arranged around the feed pipe 2, with a suction port opened on the lower side of the suction pipe to collect dust around the feed pipe 2. The dust collection device 4 can be a commercially available industrial vacuum cleaner. The motor drives the impeller to rotate at high speed, creating a negative pressure inside the sealed dust collection bin. The dust from the spreading site is directly sucked into the bin through the suction port, achieving efficient dust collection.

[0044] As a further optimization, a flexible enclosure 5 is installed around the outer perimeter of the feed pipe 2, with the dust suction end 40 positioned between the flexible enclosure 5 and the feed pipe 2. The flexible enclosure 5 can be made of flexible composite materials such as antistatic PVC coated cloth, flame-retardant antistatic canvas, or composite fiberglass flexible curtain, which are antistatic, wear-resistant, and corrosion-resistant.

[0045] It is understandable that the gap between the flexible barrier 5 and the concrete base is larger than the gap between the scraper 31 and the concrete base; otherwise, it would scrape the already leveled powder layer and affect the spreading effect.

[0046] The flexible enclosure 5 can physically intercept most of the dust that escapes outward. When working in conjunction with a vacuum cleaner, it can create a local negative pressure space between the flexible enclosure 5 and the discharge pipe 2, which can efficiently suck back the loose dust that has not settled completely, greatly reducing the amount of dust that spills out on site.

[0047] Before operation, adjust the distance between the suction pipe and the concrete base surface, as well as the parameters of the suction device 4, to avoid excessive airflow that could disrupt the normal spreading trajectory and to prevent excessive suction from drawing up too much powder. Those skilled in the art can achieve these effects through a limited number of trials and adjustments; specific adjustment methods will not be elaborated here.

[0048] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A powder conformal quantitative spreading device adapted to uneven concrete surfaces, comprising a hopper (1), characterized in that, The material hopper (1) has at least one floating scraper assembly (3) at the lower end of the discharge pipe (2). The floating scraper assembly (3) includes a positioning plate (30) and a scraper (31) respectively disposed on the front and rear sides of the discharge pipe (2) in the spreading direction. The positioning plate (30) and the scraper (31) are fixedly connected and can move up and down along the discharge pipe (2). The positioning plate (30) is used to abut against the concrete base surface. There is a preset longitudinal distance between the lower end surface of the scraper (31) and the lower end surface of the positioning plate (30).

2. The powder conformal quantitative spreading device adapted to uneven concrete surfaces according to claim 1, characterized in that, It also includes a material feeding control component driven and connected by the floating scraper assembly (3).

3. The powder conformal quantitative spreading device adapted to uneven concrete surfaces according to claim 2, characterized in that, The feeding control assembly includes a moving gate (33) and a fixed gate (32) placed horizontally inside the feeding pipe (2). The moving gate (33) is fixedly connected to the positioning plate (30) or the scraper (31). The fixed gate (32) is fixedly arranged on the opposite side of the moving gate (33) and maintains a distance from the moving gate (33). When the lower end face of the positioning plate (30) is at the horizontal reference plane, the ends of the moving gate (33) and the fixed gate (32) that are close to each other are on the same plane.

4. The powder conformal quantitative spreading device adapted to uneven concrete substrates according to claim 3, characterized in that, The lower end of the feed pipe (2) is provided with a longitudinally extending strip-shaped through hole (20). The positioning plate (30) and the scraper (31) are connected by a connecting rod (34). The connecting rod (34) passes through the strip-shaped through hole (20). The moving gate plate (33) is fixedly connected to the connecting rod (34). The fixed gate plate (32) is provided with a channel that allows the connecting rod (34) to pass through.

5. A powder conformal quantitative spreading device adapted to uneven concrete substrates according to claim 1 or 2, characterized in that, The hopper (1) is equipped with a screw conveyor (6) for quantitative feeding.

6. A powder conformal quantitative spreading device adapted to uneven concrete surfaces according to claim 1 or 2, characterized in that, The silo (1) is divided into three independent storage areas, and the discharge pipes (2) of the three storage areas are arranged side by side. Each storage area is equipped with a screw conveyor (6).

7. A powder conformal quantitative spreading device adapted to uneven concrete surfaces according to claim 5, characterized in that, It also includes a vibrating screen (7) disposed between the screw conveyor (6) and the feed pipe (2).

8. The powder conformal quantitative spreading device adapted to uneven concrete surfaces according to claim 7, characterized in that, It also includes a vehicle body for loading the hopper (1), the wheels of which are connected to the vehicle frame via shock absorbers.

9. A powder conformal quantitative spreading device adapted to uneven concrete substrates according to claim 1 or 2, characterized in that, It also includes a dust collection device (4), whose dust collection end (40) is located on the periphery of the feed pipe (2).

10. A powder conformal quantitative spreading device adapted to uneven concrete substrates according to claim 9, characterized in that, The feed pipe (2) is provided with a flexible enclosure (5) on its outer periphery, and the dust suction end (40) is located between the flexible enclosure (5) and the feed pipe (2).

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