A concrete spraying maintenance device for construction engineering

CN122896276APending Publication Date: 2026-10-13RIZHAO BOHONG CONSTRUCTION ENGINEERING CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202611288711.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-24
Publication Date
2026-10-13

AI Technical Summary

Technical Problem

[0003]传统的喷淋方式是依靠人工手动洒水,比较依赖经验,现在市面上也出现了一些自动化喷水设备,但通常都是将混凝土构件静置在支架上,然后再利用水管进行喷淋,此种喷淋方式很难喷淋到预制构件的底部以及侧边的死角位置,导致喷淋不均而影响养护效果,同时长时间固定方向的喷水也会使预制构件表面受到过度冲刷而导致结构破坏,严重影响养护质量

Benefits of technology

[0020](1)通过设置养护筒箱以及安装机构,随着驱动电机带动驱动轴开始旋转,固定框架将随着安装架绕驱动轴开始公转,与此同时,固定框架将带动内部的混凝土构件开始轴向自转,配合喷淋管的向下喷淋过程,混凝土构件在公转以及自转过程中能够得到充分全面的喷淋,避免存在喷淋死角盲区或喷淋不均的问题,有效提高了混凝土构件的养护效果,同时混凝土构件在动态旋转中进行喷淋,可以有效减弱喷淋水流的冲刷作用,避免长时间静置冲刷而破坏混凝土结构。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122896276A_ABST
    Figure CN122896276A_ABST
Patent Text Reader

Abstract

The present application relates to the field of concrete curing, especially to a concrete spraying curing device for construction engineering, comprising: a curing cylinder box with a horizontal cylinder cavity inside; a mounting mechanism comprising a driving shaft, the two ends of the driving shaft being rotationally matched with end covers and being driven to rotate by a driving motor, mounting racks being fixedly arranged at the two ends of the driving shaft, and a plurality of groups of fixing frames for mounting concrete members being uniformly arranged between the mounting racks; and a spraying mechanism comprising a mixed water tank, the mixed water tank being fixedly arranged at the top end of the curing cylinder box, and a spraying pipe being communicatively arranged at the bottom of the mixed water tank. In the present application, the concrete members can be fully and comprehensively sprayed during revolution and rotation, avoiding the problems of dead angle or uneven spraying, and the spraying of the concrete members in dynamic rotation can effectively weaken the scouring effect of the spraying water flow, avoiding the damage to the concrete structure caused by long-time static scouring.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This invention relates to the field of concrete curing technology, and in particular to a concrete spray curing device for construction engineering. Background Technology

[0002] Precast concrete components are building components made in factories using concrete as the basic material. These include beams, slabs, columns, and architectural finishing accessories. They form the material basis of industrialized construction and are widely used in the construction industry. After preparation, precast concrete components often require spray curing. Spray curing is a crucial process for ensuring the quality of concrete structures. By promptly covering and sprinkling water after pouring, a moist environment is created, preventing surface cracking caused by heat of hydration, effectively improving its durability and impermeability. It is one of the most widely used curing methods in construction engineering.

[0003] Traditional spraying methods rely on manual watering, which is quite experience-dependent. While some automated spraying equipment has emerged on the market, it typically involves placing the concrete component on a support and then spraying it with water pipes. This method makes it difficult to reach the bottom and sides of the precast component, resulting in uneven spraying and affecting the curing effect. Furthermore, prolonged spraying in a fixed direction can cause excessive erosion of the surface of the precast component, leading to structural damage and severely impacting the quality of curing. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete spraying curing device for construction engineering, which aims to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A concrete spray curing device for construction engineering includes:

[0007] The curing chamber has a horizontal cylindrical cavity inside. A door is slidably installed on the side wall of the curing chamber. End caps are detachably installed at both ends of the curing chamber. A sewage chamber is provided at the bottom of the curing chamber. A drive motor is fixedly installed on one side of the curing chamber.

[0008] The mounting mechanism includes a drive shaft, both ends of which are rotatably engaged with end caps and driven to rotate by a drive motor. Mounting brackets are fixed at both ends of the drive shaft. Multiple sets of fixed frames for mounting concrete components are circumferentially and evenly arranged between the mounting brackets. The fixed frames will also rotate on their own axis while revolving around the mounting brackets.

[0009] The spraying mechanism includes a mixing tank, which is fixed at the top of the curing tank. A spray pipe is connected to the bottom of the mixing tank. Dosing cylinders are symmetrically arranged on both sides of the mixing tank. The dosing cylinders intermittently add curing solution into the mixing tank as the drive shaft rotates.

[0010] The cleaning mechanism includes a set of symmetrically arranged drain scrapers at both ends of the sewage chamber, which reciprocate within the sewage chamber as the drive shaft rotates.

[0011] As a further aspect of the present invention: a fixing groove is provided inside the fixing frame for the installation of concrete components; a limiting plate is detachably installed on the side wall of the fixing frame; the limiting plate is used to block the concrete components in the fixing groove; a pivot is fixedly provided at both ends of the fixing frame; the pivot is rotatably engaged with the mounting frame; a synchronizing gear is fixedly sleeved on the pivot; an internal gear ring is fixedly provided on the inner wall of the curing cylinder; and the synchronizing gear meshes with the internal gear ring.

[0012] As a further embodiment of the present invention: the spray pipe is disposed at the top of the inner cavity of the curing cylinder, and several branch pipes are uniformly connected to the spray pipe, and multiple sets of spray heads are uniformly connected to the bottom of the branch pipes.

[0013] As a further aspect of the present invention: an inlet pipe is connected to the top of the dosing cylinder, and an outlet pipe is connected between one side of the dosing cylinder and the mixing tank. Both the inlet pipe and the outlet pipe are equipped with one-way valves. The flow direction of the one-way valve on the inlet pipe is from the outside to the dosing cylinder, and the flow direction of the one-way valve on the outlet pipe is from the dosing cylinder to the mixing tank.

[0014] As a further embodiment of the present invention: an upper piston rod is slidably provided through the bottom of the dosing cylinder, the bottom end of the upper piston rod passes through the dosing cylinder and is fixedly connected to an upper bracket, an upper roller is rotatably installed inside the upper bracket, and an upper spring is provided between the top of the upper bracket and the inner wall of the curing cylinder.

[0015] As a further embodiment of the present invention: the L-shaped cavity is formed by interconnected vertical and horizontal cylinders, a lower piston rod is slidably provided through the top of the vertical cylinder, a lower bracket is fixedly connected to the top of the lower piston rod, a lower roller is rotatably installed inside the lower bracket, a lower spring is provided between the bottom of the lower bracket and the inner wall of the maintenance cylinder, a horizontal piston rod is slidably provided through the end of the horizontal cylinder, and the end of the horizontal piston rod is fixedly connected to the sewage scraper.

[0016] As a further aspect of the present invention: eccentric cams are fixedly sleeved at both ends of the drive shaft, the upper roller rolls against the top of the eccentric cam, and the lower roller rolls against the bottom of the eccentric cam.

[0017] As a further embodiment of the present invention: a sludge trough is provided through the bottom of the inner cavity of the maintenance cylinder, the sludge trough is connected to the sewage chamber, and a sewage pipe is provided in the center of the bottom of the sewage chamber.

[0018] As a further aspect of the present invention: an arc-shaped cleaning scraper is fixedly connected to the top of the sewage scraper, and the cleaning scraper is slidably mounted against the top of the sewage trough.

[0019] The beneficial effects of this invention are:

[0020] (1) By setting up a curing cylinder and installation mechanism, as the drive motor drives the drive shaft to start rotating, the fixed frame will start to revolve around the drive shaft with the installation frame. At the same time, the fixed frame will drive the internal concrete components to start to rotate axially. In conjunction with the downward spraying process of the spray pipe, the concrete components can be fully and comprehensively sprayed during the revolution and rotation process, avoiding the problems of spray dead zones or uneven spraying, effectively improving the curing effect of the concrete components. At the same time, the spraying of the concrete components during dynamic rotation can effectively reduce the scouring effect of the spray water flow and avoid long-term static scouring that damages the concrete structure.

[0021] (2) By setting up a spraying mechanism, the eccentric cam drives the upper piston rod to reciprocate in the dosing cylinder through the upper roller. When the upper piston rod is pulled down, the curing liquid in the external liquid tank will be drawn into the dosing cylinder through the inlet pipe. When the upper piston rod is pushed up, the curing liquid will be squeezed into the outlet pipe and flow into the mixing tank. This allows the curing liquid to be continuously and intermittently added to the mixing tank, ensuring that the spraying liquid always has a sufficient concentration of curing agent, which is beneficial to improving the curing effect.

[0022] (3) By setting up a cleaning mechanism, the eccentric cam drives the lower piston rod to reciprocate in the L-shaped cavity through the lower roller. When the lower piston rod reciprocates, it will drive the horizontal piston rod to move synchronously through the pressure difference, thereby driving the sewage scraper to scrape back and forth in the sewage chamber. This can effectively clean and remove the sewage and concrete particles generated during the spraying process. The sewage discharge process is automatic and does not require manual intervention, making it highly efficient and practical. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the internal structure of the curing tank in this invention.

[0026] Figure 3 This is a schematic diagram of the longitudinal section of the curing cylinder in this invention.

[0027] Figure 4 This is a schematic diagram of the structure of the curing tank in this invention.

[0028] Figure 5 This is a schematic diagram of the installation mechanism in this invention.

[0029] Figure 6 This is a schematic diagram of the fixed frame structure in this invention.

[0030] Figure 7 This is a schematic diagram of the spraying mechanism in this invention.

[0031] Figure 8 This is a schematic diagram of the internal structure of the dosing cartridge in this invention.

[0032] Figure 9 This is a schematic diagram of the cleaning mechanism in this invention.

[0033] Figure 10 This is a schematic diagram of the internal structure of the L-shaped cavity in this invention.

[0034] In the picture:

[0035] 1. Maintenance chamber; 11. Door; 12. End cover; 13. Sewage chamber; 131. Sewage trough; 132. Sewage pipe; 14. Internal gear ring;

[0036] 2. Drive motor;

[0037] 3. Spraying mechanism; 31. Mixing tank; 32. Spray pipe; 321. Branch pipe; 322. Spray head; 33. Dosing cartridge; 331. Inlet pipe; 332. Outlet pipe; 333. Check valve; 34. Upper piston rod; 341. Upper roller; 342. Upper spring;

[0038] 4. Mounting mechanism; 41. Drive shaft; 42. Mounting bracket; 43. Fixing frame; 431. Fixing groove; 432. Limiting plate; 433. Pivot; 434. Synchronizing gear; 44. Eccentric cam;

[0039] 5. Cleaning mechanism; 51. L-shaped cavity; 52. Lower piston rod; 521. Lower roller; 522. Lower spring; 53. Horizontal piston rod; 531. Sewage scraper; 532. Cleaning scraper. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-5 and Figure 10 As shown, the present invention is a concrete spray curing device for construction engineering, comprising:

[0042] The curing chamber 1 has a horizontal cylindrical cavity inside. A door 11 is slidably installed on the side wall of the curing chamber 1. End caps 12 are detachably installed at both ends of the curing chamber 1. A sewage chamber 13 is provided at the bottom inside the curing chamber 1. A drive motor 2 is fixedly installed on one side of the curing chamber 1.

[0043] The mounting mechanism 4 includes a drive shaft 41, which is rotatably engaged with the end cover 12 at both ends and is driven to rotate by the drive motor 2. Mounting frames 42 are fixed at both ends of the drive shaft 41. Multiple sets of fixed frames 43 for mounting concrete components are evenly rotated in the circumference between the mounting frames 42. The fixed frames 43 will also rotate on their own axis while revolving around the mounting frames 42.

[0044] The spraying mechanism 3 includes a mixing tank 31, which is fixed at the top of the curing cylinder 1. A spray pipe 32 is connected to the bottom of the mixing tank 31. Dosing cylinders 33 are symmetrically arranged on both sides of the mixing tank 31. The dosing cylinders 33 intermittently add curing liquid into the mixing tank 31 as the drive shaft 41 rotates.

[0045] The cleaning mechanism 5 includes a set of symmetrically arranged drain scrapers 531 at both ends of the sewage chamber 13. The drain scrapers 531 reciprocate within the sewage chamber 13 as the drive shaft 41 rotates.

[0046] Specifically, by setting up the curing chamber 1 and the installation mechanism 4, the concrete component will be installed and fixed in the fixed frame 43 during use. As the drive motor 2 drives the drive shaft 41 to start rotating, the fixed frame 43 will start to revolve around the drive shaft 41 along with the installation frame 42. At the same time, the fixed frame 43 will drive the internal concrete component to start to rotate axially. With the downward spraying process of the spray pipe 32, the concrete component can be fully and comprehensively sprayed during the revolution and rotation, avoiding the problems of spray dead zones or uneven spraying, effectively improving the curing effect of the concrete component. At the same time, the spraying of the concrete component during dynamic rotation can effectively reduce the scouring effect of the spray water flow and avoid damage to the concrete structure due to long-term static scouring.

[0047] like Figures 4-6As shown, a fixing groove 431 for installing concrete components is provided inside the fixing frame 43. A limiting plate 432 is detachably installed on the side wall of the fixing frame 43. The limiting plate 432 is used to block the concrete components in the fixing groove 431. Pivots 433 are fixed at both ends of the fixing frame 43. The pivots 433 are rotatably engaged with the mounting frame 42. A synchronous gear 434 is fixedly sleeved on the pivot 433. An internal gear ring 14 is fixedly installed on the inner wall of the curing cylinder 1. The synchronous gear 434 meshes with the internal gear ring 14.

[0048] Specifically, after the concrete component is installed in the fixing groove 431, the fixing limiting plate 432 is locked with bolts, so that the concrete component can be firmly limited and blocked in the fixing groove 431, preventing it from falling off during the spraying process. When the fixing frame 43 starts to revolve around the drive shaft 41, the synchronizing gear 434 will mesh synchronously with the internal gear ring 14, thereby driving the fixing frame 43 to start the axial rotation process.

[0049] like Figure 2 and Figure 7 As shown, the spray pipe 32 is located at the top of the inner cavity of the curing cylinder 1. Several branch pipes 321 are evenly connected to the spray pipe 32, and multiple sets of nozzles 322 are evenly connected to the bottom of the branch pipes 321.

[0050] Specifically, the distributed branch pipes 321 and nozzles 322 can effectively expand the spraying area, thereby greatly increasing the spraying range and ensuring that the concrete components are sprayed comprehensively without any blind spots.

[0051] like Figure 7 and Figure 8 As shown, an inlet pipe 331 is connected to the top of the dosing cylinder 33, and an outlet pipe 332 is connected between one side of the dosing cylinder 33 and the mixing tank 31. Both the inlet pipe 331 and the outlet pipe 332 are equipped with one-way valves 333. The flow direction of the one-way valve 333 on the inlet pipe 331 is from the outside to the dosing cylinder 33, and the flow direction of the one-way valve 333 on the outlet pipe 332 is from the dosing cylinder 33 to the mixing tank 31.

[0052] Furthermore, an upper piston rod 34 is slidably installed through the bottom of the dosing cylinder 33. The bottom end of the upper piston rod 34 extends out of the dosing cylinder 33 and is fixedly connected to an upper bracket. An upper roller 341 is rotatably installed inside the upper bracket, and an upper spring 342 is installed between the top of the upper bracket and the inner wall of the maintenance cylinder box 1.

[0053] Specifically, by setting up the spraying mechanism 3, during the spraying process, the drive shaft 41 will continuously drive the eccentric cams 44 at both ends to rotate continuously. During the rotation, the eccentric cams 44 will drive the upper piston rod 34 to reciprocate in the dosing cylinder 33 through the upper roller 341. When the upper piston rod 34 is pulled down, the curing liquid in the external liquid tank will be drawn into the dosing cylinder 33 through the liquid inlet pipe 331. When the upper piston rod 34 is pushed up, the curing liquid will be squeezed into the liquid outlet pipe 332 and flow into the mixing tank 31. This allows the curing liquid to be intermittently added to the mixing tank 31, ensuring that there is always a sufficient concentration of curing agent in the spraying liquid, which is beneficial to improving the curing effect.

[0054] More specifically, during the process of adding the maintenance fluid, the one-way valves 333 on the inlet pipe 331 and the outlet pipe 332 can utilize the one-way flow characteristic to allow the maintenance fluid to flow along the correct path as the upper piston rod 34 is pulled back and forth, thus avoiding backflow.

[0055] like Figure 9 and Figure 10 As shown, the L-shaped cavity 51 is formed by interconnected vertical and horizontal cylinders. A lower piston rod 52 is slidably installed through the top of the vertical cylinder. A lower support is fixedly connected to the top of the lower piston rod 52. A lower roller 521 is rotatably installed inside the lower support. A lower spring 522 is installed between the bottom of the lower support and the inner wall of the maintenance cylinder 1. A horizontal piston rod 53 is slidably installed through the end of the horizontal cylinder. The end of the horizontal piston rod 53 is fixedly connected to the sewage scraper 531.

[0056] Furthermore, eccentric cams 44 are fixedly sleeved at both ends of the drive shaft 41. The upper roller 341 rolls against the top of the eccentric cam 44, and the lower roller 521 rolls against the bottom of the eccentric cam 44.

[0057] Specifically, by setting up the cleaning mechanism 5, during the spraying process, the drive shaft 41 will continuously drive the eccentric cams 44 at both ends to rotate continuously. During the rotation, the eccentric cams 44 will drive the lower piston rod 52 to reciprocate within the L-shaped cavity 51 through the lower roller 521. Since the L-shaped cavities 51 are interconnected, the lower piston rod 52 will drive the horizontal piston rod 53 to move synchronously through the pressure difference during the reciprocating motion. This will drive the sewage scraper 531 to scrape back and forth within the sewage chamber 13, thereby effectively cleaning and scraping away the sewage and concrete particles generated during the spraying process. The sewage discharge process is automatic and requires no manual intervention, making it highly efficient and practical.

[0058] like Figure 2 and Figure 10 As shown, a sludge trough 131 is provided through the bottom of the inner cavity of the maintenance chamber 1. The sludge trough 131 is connected to the sewage chamber 13. A sewage pipe 132 is provided in the center of the bottom of the sewage chamber 13.

[0059] Furthermore, an arc-shaped cleaning scraper 532 is fixedly connected to the top of the sewage scraper 531, and the cleaning scraper 532 is slidably mounted against the top of the sewage trough 131.

[0060] The cleaning scraper 532 moves synchronously with the sewage scraper 531, thereby scraping and cleaning the concrete particles inside and on the surface of the sewage trough 131, preventing the accumulation of particles and impurities that could cause blockages. The scraped particles fall directly into the sewage chamber 13 through the sewage trough 131, and are then scraped and cleaned by the sewage scraper 531, allowing them to be smoothly discharged along the sewage pipe 132.

[0061] The working principle of this invention is as follows: Figures 1-10 As shown, during use, first open the hatch 11, install the concrete components one by one into the fixing grooves 431 within the fixed frame 43, and lock the limiting plate 432 to prevent them from detaching. After installation, close the hatch 11, start the drive motor 2, and the drive motor 2 will drive the drive shaft 41 to start rotating. The fixed frame 43 will begin to revolve around the drive shaft 41 along with the mounting frame 42. At the same time, the synchronous teeth 434 at both ends of the fixed frame 43 will mesh synchronously with the internal gear ring 14, thereby driving the fixed frame 43 to begin axial rotation. Combined with the downward spraying process of the spray pipe 32, the concrete components can be fully and comprehensively sprayed during the revolution and rotation, avoiding the problems of spray dead zones or uneven spraying. During the spraying process, the drive shaft 41 will continuously drive the eccentric cams 44 at both ends to rotate continuously. During the rotation, the eccentric cams 44 will drive the upper piston rod 34 to reciprocate in the dosing cylinder 33 through the upper roller 341. When the upper piston rod 34 is pulled down, the maintenance liquid in the external liquid tank will be drawn into the dosing cylinder 33 through the liquid inlet pipe 331. When the upper piston rod 34 is pushed up, the maintenance liquid will be squeezed into the liquid outlet pipe 332 and flow into the mixing tank 31, so that the maintenance liquid can be continuously and intermittently added to the mixing tank 31. During rotation, the eccentric cam 44 will also drive the lower piston rod 52 to reciprocate within the L-shaped cavity 51 via the lower roller 521. Since the L-shaped cavities 51 are interconnected, the lower piston rod 52 will drive the horizontal piston rod 53 to move synchronously through the pressure difference during reciprocating motion. This will drive the sewage scraper 531 to scrape back and forth within the sewage chamber 13, thereby effectively cleaning and removing sewage and concrete particles generated during the spraying process.

[0062] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A concrete spray curing device for construction engineering, characterized in that, include: The curing tank (1) has a horizontal cylindrical cavity inside. A door (11) is slidably installed on the side wall of the curing tank (1). End caps (12) are detachably installed at both ends of the curing tank (1). A sewage chamber (13) is provided at the bottom inside the curing tank (1). A drive motor (2) is fixedly installed on one side of the curing tank (1). The mounting mechanism (4) includes a drive shaft (41), both ends of which are rotatably engaged with end caps (12) and driven to rotate by a drive motor (2). Mounting frames (42) are fixed at both ends of the drive shaft (41). Multiple sets of fixed frames (43) for mounting concrete components are evenly rotated in the circumferential direction between the mounting frames (42). The fixed frames (43) will rotate on their own axis while revolving around the mounting frames (42). The spraying mechanism (3) includes a mixing tank (31), which is fixed at the top of the curing tank (1). A spray pipe (32) is connected to the bottom of the mixing tank (31). A dosing cylinder (33) is symmetrically arranged on both sides of the mixing tank (31). The dosing cylinder (33) intermittently adds curing liquid into the mixing tank (31) as the drive shaft (41) rotates. The cleaning mechanism (5) includes a set of symmetrically arranged drain scrapers (531) at both ends of the sewage chamber (13), which reciprocate within the sewage chamber (13) as the drive shaft (41) rotates.

2. The concrete spray curing device for construction engineering according to claim 1, characterized in that, The fixed frame (43) is provided with a fixed groove (431) for the installation of concrete components. A limiting plate (432) is detachably installed on the side wall of the fixed frame (43). The limiting plate (432) is used to block the concrete components in the fixed groove (431). A pivot (433) is fixed at both ends of the fixed frame (43). The pivot (433) is rotatably engaged with the mounting frame (42). A synchronizing gear (434) is fixedly sleeved on the pivot (433). An internal gear ring (14) is fixedly installed on the inner wall of the curing cylinder (1). The synchronizing gear (434) meshes with the internal gear ring (14).

3. The concrete spray curing device for construction engineering according to claim 1, characterized in that, The spray pipe (32) is located at the top of the inner cavity of the curing cylinder (1). Several branch pipes (321) are evenly connected on the spray pipe (32), and multiple sets of nozzles (322) are evenly connected at the bottom of the branch pipes (321).

4. A concrete spray curing device for construction engineering according to claim 1, characterized in that, The top of the dosing cylinder (33) is connected to an inlet pipe (331), and an outlet pipe (332) is connected between one side of the dosing cylinder (33) and the mixing tank (31). Both the inlet pipe (331) and the outlet pipe (332) are equipped with one-way valves (333). The flow direction of the one-way valve (333) on the inlet pipe (331) is from the outside to the dosing cylinder (33), and the flow direction of the one-way valve (333) on the outlet pipe (332) is from the dosing cylinder (33) to the mixing tank (31).

5. A concrete spray curing device for construction engineering according to claim 4, characterized in that, The bottom of the dosing cylinder (33) is slidably provided with an upper piston rod (34). The bottom end of the upper piston rod (34) passes through the dosing cylinder (33) and is fixedly connected to an upper bracket. An upper roller (341) is rotatably installed inside the upper bracket. An upper spring (342) is provided between the top of the upper bracket and the inner wall of the maintenance cylinder box (1).

6. A concrete spray curing device for construction engineering according to claim 5, characterized in that, The L-shaped cavity (51) is formed by interconnected vertical and horizontal cylinders. A lower piston rod (52) is slidably provided through the top of the vertical cylinder. A lower support is fixedly connected to the top of the lower piston rod (52). A lower roller (521) is rotatably installed inside the lower support. A lower spring (522) is provided between the bottom of the lower support and the inner wall of the maintenance cylinder (1). A horizontal piston rod (53) is slidably provided through the end of the horizontal cylinder. The end of the horizontal piston rod (53) is fixedly connected to the sewage scraper (531).

7. A concrete spray curing device for construction engineering according to claim 6, characterized in that, The drive shaft (41) is fixedly sleeved with eccentric cams (44) at both ends. The upper roller (341) rolls against the top of the eccentric cam (44), and the lower roller (521) rolls against the bottom of the eccentric cam (44).

8. A concrete spray curing device for construction engineering according to claim 6, characterized in that, The bottom of the inner cavity of the maintenance box (1) is provided with a sludge trough (131), which is connected to the sewage chamber (13). A sewage pipe (132) is provided in the center of the bottom of the sewage chamber (13).

9. A concrete spray curing device for construction engineering according to claim 8, characterized in that, The top of the sewage scraper (531) is fixed with an arc-shaped cleaning scraper (532), which is slidably attached to the top of the sewage trough (131).