Road precast beam spraying maintenance device
By using a powerful blower to remove dust and debris, combined with an electric push rod adjustment and a properly connected spraying assembly, the problems of difficult cleaning and uneven spraying in existing devices have been solved, achieving efficient and uniform spraying curing effects, and improving the quality of precast beams and work efficiency.
Patent Information
- Application Number
- CN202520472145.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing spray curing devices for precast highway beams are ineffective at removing dust and debris from the beam yard, resulting in mud and water mixing after spraying, which affects work efficiency and the surface quality of precast beams. At the same time, the unreasonable layout of the spray heads leads to blind spots in the spray coverage area, making it impossible to spray evenly and comprehensively.
A spraying maintenance device was designed, comprising a powerful blower, a concave water tank, an electric actuator, and a reasonably connected pipeline assembly. The powerful blower removes dust and debris, the electric actuator adjusts the spraying position, and the reasonable pipeline connection ensures water pressure and angle, thereby achieving uniform spraying.
This effectively avoids the mixing of mud and water, improves work efficiency and the surface quality of precast beams, ensures uniform spraying of all parts of the precast beams, and enhances the overall quality and stability of the precast beams.
Smart Images
Figure CN223643923U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of highway engineering construction equipment, and in particular to a spray curing device for precast highway beams. Background Technology
[0002] In highway construction, precast beams are important structural components, and their quality directly affects the overall performance and safety of highway projects. After the precast beams are manufactured, they need to be sprayed for curing. However, the existing spray curing devices for highway precast beams still have some shortcomings in practical applications.
[0003] Existing spray curing devices for precast highway beams struggle to remove dust, leaves, and other debris from the beam yard during spraying, resulting in a muddy-water mixture that hinders work. This not only reduces efficiency but also negatively impacts the surface quality of the precast beams, causing stains and erosion. While some spray curing devices are designed with multiple spray heads, their improper layout and angles create blind spots, preventing even and comprehensive spraying of the precast beams. Therefore, we are introducing a new spray curing device for precast highway beams. Utility Model Content
[0004] The main purpose of this utility model is to provide a spray curing device for precast highway beams, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A spray curing device for precast highway beams includes a handle, with a lifting device fixedly connected to both ends of the handle. A connecting device is fixedly connected to the left end of the lifting device. Lockable movable wheels are fixedly connected to the lower end of the connecting device and the lower end of the lifting device. Four lockable movable wheels are provided.
[0007] The lifting device includes a water tank, with an observation window for water level at the front right side of the water tank, a water inlet at the upper right side of the water tank, an adjustment component inserted through the upper right side of the water tank, a spraying component fixedly connected to the front and rear ends of the adjustment component, a drain pipe inserted through the lower right side of the water tank, and three spraying components. The water tank is fixedly connected to the handle.
[0008] Preferably, the adjustment component includes an electric push rod, the output end of which is connected to a water box. The water box has three connecting pipe slots at both its front and rear ends, for a total of six connecting pipe slots. A support block is fixedly connected to the upper right end of each connecting pipe slot. A clamping sleeve is engaged at the upper end of the support block. A cleaning needle is fixedly connected to the upper end of the clamping sleeve. Two corrugated telescopic tubes are fixedly connected to the lower right end of the water box. Two corrugated telescopic tubes are provided, and a miniature water pump is provided on the outer surface of each of the two corrugated telescopic tubes. The electric push rod is fixedly connected to the left side of the water tank.
[0009] Preferably, the spraying assembly includes two connecting pipes. Each connecting pipe has a switch valve on its outer surface. One end of each connecting pipe is fixedly connected to a central pipe. Both ends of the central pipes are fixedly connected to booster water pipes. The outer surfaces of the two front booster water pipes and the two rear booster water pipes are each equipped with a booster pump. The other ends of the two front and two rear booster water pipes are jointly fixedly connected to two long pipes. Spray heads are interlaced on the outer surfaces of both long pipes. Several spray heads are provided. The other ends of the two connecting pipes are respectively fixedly connected to the front and rear ends of the water box.
[0010] Preferably, the connecting device includes a left plate, a fixing plate is fixedly connected to the upper right end of the left plate, a mounting groove is opened in the middle of the left end of the left plate, mounting screw holes are opened around the left end of the left plate, mounting bolts are threaded into the four mounting screw holes, a fan housing is fixedly connected in the mounting groove, mounting ear plates are fixedly connected around the outer surface of the fan housing, a protective net cover is fixedly connected to the left side of the inner wall of the fan housing, a powerful fan is inserted and fixedly connected to the middle of the right end of the fan housing, and the left plate is fixedly connected to the left end of the water storage tank.
[0011] Preferably, the water storage tank has a concave structure, and the water storage tank is connected to the interior of the connecting water box through two corrugated expansion tubes.
[0012] By adopting the above technical solution: the concave structure of the water tank can increase the water storage space and is more stable when placed, making it less likely to tip over. The corrugated expansion tube can extend and retract flexibly to ensure unobstructed water flow, so that the water in the water tank can be stably transported to the connecting water box without being affected by changes in position.
[0013] Preferably, the electric push rod is fixedly installed at the lower end of the fixed plate, the clamping cylinder and the bearing block are detachably clamped together, and the size of the cleaning needle is adapted to the spray hole size of several spray heads.
[0014] By adopting the above technical solution, the cleaning needle can be easily installed or removed when needed. When the spray nozzle is clogged, the appropriately sized cleaning needle can effectively clean the nozzle, ensuring the normal operation of the spray head and maintaining the spray maintenance effect.
[0015] Preferably, the spray heads on the left and the spray heads on the right are arranged in a fan-shaped path, and the two spray heads are connected to the inside of the water box through a booster water pipe, a central pipe and a connecting pipe in sequence.
[0016] By adopting the above technical solution: reasonable pipe connection, that is, connecting the sprinkler head to the connecting water box through the booster water pipe, the central pipe and the connecting pipe can ensure that the water flow can smoothly reach the sprinkler head from the connecting water box, and the booster pump on the booster water pipe can pressurize the water flow so that the water sprayed from the sprinkler head has a suitable pressure to meet the needs of spray maintenance.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. In this utility model, the existing highway precast beam spraying and curing devices are difficult to clean up debris in the beam yard, resulting in mud and water mixing after spraying, which affects personnel operations and the surface quality of the precast beams. This device solves this problem by using a powerful fan in the connecting device. When in use, the connecting device is started first, and the powerful fan generates strong wind to blow away dust, leaves, weeds and other impurities in the beam yard. This design effectively avoids the formation of mud and water by mixing impurities with water during spraying, creating good conditions for subsequent spraying operations. On the one hand, it improves the efficiency of personnel operations, so that workers do not have to work in a muddy and watery environment. On the other hand, it prevents the mud and water mixture from causing stains and erosion on the surface of the precast beams, thereby ensuring the appearance quality of the precast beams.
[0019] 2. In this utility model, several spray heads of the spraying component are arranged in a fan-shaped path and connected by reasonable pipelines, namely, sequentially connected to the water box via a connecting pipe, a central pipe, and a booster water pipe. The booster pump on the booster water pipe ensures that the water flow has sufficient pressure to reach the spray heads. This design allows water to be sprayed onto the precast beam at a suitable angle and range, fully covering all parts of the precast beam, including edges, corners, and other areas prone to insufficient curing. By achieving uniform spraying, it ensures that the concrete in all parts of the precast beam receives sufficient moisture nourishment, promotes the uniformity of the hydration reaction, thereby improving the overall quality stability of the precast beam and providing a strong guarantee for the quality of highway engineering. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of a spray curing device for precast highway beams according to this utility model;
[0021] Figure 2This is a small-explosion structural diagram of the connection device of the spray curing device for precast highway beams according to this utility model;
[0022] Figure 3 This is a schematic diagram of the lifting device structure of a spray curing device for precast highway beams according to the present invention;
[0023] Figure 4 This is a schematic diagram of the adjustment component structure of a spray curing device for precast highway beams according to the present invention;
[0024] Figure 5 This is a schematic diagram of the spraying component structure of a precast highway beam spraying curing device according to the present invention.
[0025] In the diagram: 1. Handle; 2. Connecting device; 3. Lockable movable wheel; 4. Lifting device; 21. Left plate; 22. Fixing plate; 23. Mounting slot; 24. Mounting screw hole; 25. Fan housing; 26. Mounting ear plate; 27. Powerful fan; 28. Protective net cover; 29. Mounting bolt; 41. Observation window for water level; 42. Drain pipe; 43. Water tank; 44. Adjustment component; 45. Spraying component; 46. Water inlet; 441. Electric push rod; 442. Connecting water box; 443. Connecting pipe groove; 444. Bearing block; 445. Clamping sleeve; 446. Cleaning needle; 447. Mini water pump; 448. Corrugated telescopic pipe; 451. Connecting pipe; 452. Switch valve; 453. Central pipe; 454. Booster water pipe; 455. Booster pump; 456. Long pipe; 457. Spray head. Detailed Implementation
[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] Please see Figure 1-5 This utility model provides a technical solution:
[0030] A spray curing device for precast highway beams includes a handle 1, with a lifting device 4 fixedly connected to both ends of the handle 1. A connecting device 2 is fixedly connected to the left end of the lifting device 4. Lockable movable wheels 3 are fixedly connected to both the lower end of the connecting device 2 and the lower end of the lifting device 4. Four lockable movable wheels 3 are provided.
[0031] In this embodiment, the lifting device 4 includes a water tank 43. A water level observation window 41 is provided on the right front end of the water tank 43. A water inlet 46 is provided on the right upper end of the water tank 43. An adjusting component 44 is inserted through the right upper end of the water tank 43. A spraying component 45 is fixedly connected to the front and rear ends of the adjusting component 44. A drain pipe 42 is inserted through the lower right end of the water tank 43. Three spraying components 45 are provided. The water tank 43 is fixedly connected to the handle 1. The adjusting component 44 includes an electric push rod 441. The output end of the electric push rod 441 is connected to a connecting water box 442. The connecting water box 442 has three connecting points on both its front and rear ends. The system includes six connecting pipe grooves 443. A support block 444 is fixedly connected to the upper right end of each connecting pipe groove 443. A clamping sleeve 445 is engaged with the upper end of the support block 444. A cleaning needle 446 is fixedly connected to the upper end of the clamping sleeve 445. Two corrugated telescopic pipes 448 are fixedly connected to the lower right end of the connecting water box 442. Two corrugated telescopic pipes 448 are provided, and each of the two corrugated telescopic pipes 448 has a micro water pump 447 mounted on its outer surface. An electric push rod 441 is fixedly connected to the left side of the water storage tank 43. The spraying assembly 45 includes connecting pipes 451, of which two are provided. Each of the two connecting pipes 451 has a micro water pump 447 mounted on its outer surface. A switch valve 452 is provided. One end of each of the two connecting pipes 451 is fixedly connected to a central pipe 453. Both ends of each of the two central pipes 453 are fixedly connected to a booster water pipe 454. A booster pump 455 is installed on the outer surface of both the front and rear booster water pipes 454. The other ends of both the front and rear booster water pipes 454 are fixedly connected to a long pipe 456. Two long pipes 456 are provided, and spray heads 457 are inserted and connected to the outer surface of each long pipe 456. Several spray heads 457 are provided. The other ends of the two connecting pipes 451 are respectively... Fixedly connected to the front and rear ends of the connecting water box 442, the water storage tank 43 has a concave structure and is connected to the interior of the connecting water box 442 through two corrugated telescopic pipes 448. The electric push rod 441 is fixedly installed at the lower end of the fixing plate 22. The clamping cylinder 445 and the bearing block 444 have a detachable clamping structure. The size of the cleaning needle 446 is adapted to the spray hole size of several spray heads 457. Several spray heads 457 on the left and several spray heads 457 on the right are arranged in a fan-shaped path. Two spray heads 457 are connected to the interior of the connecting water box 442 through the pressurized water pipe 454, the central pipe 453 and the connecting pipe 451 in sequence.
[0032] According to the above scheme: the lifting device 4 uses the water storage tank 43 as the core component, which has a concave structure and plays the role of water storage in the whole device. The staff can check the water level inside the water storage tank 43 in real time through the observation water level window 41 located on the right side of the front end of the water storage tank 43 to ensure sufficient water. At the same time, water is injected through the water inlet 46 on the upper right side of the water storage tank 43. The electric push rod 441 of the adjusting component 44 is fixed on the left side of the water storage tank 43 and installed at the lower end of the fixing plate 22. The output end of the electric push rod 441 is connected to the connecting water box 442. After the electric push rod 441 is activated, it can push the connecting water box 442 to adjust its position, thereby adapting to the spraying of precast beams at different heights and positions. The water box 442 is connected to the water storage tank 43 via two corrugated telescopic pipes 448. A miniature water pump 447 on the outer surface of the corrugated telescopic pipes 448 is responsible for transporting water from the water storage tank 43 to the water box 442. Even if the position of the water box 442 changes, the corrugated telescopic pipes 448 can ensure unobstructed water flow. The water box 442 has six connecting pipe slots 443 at both the front and rear ends for connecting the connecting pipe 451 of the spray assembly 45. A support block 444 is fixed to the upper right end of each connecting pipe slot 443. A clamping sleeve 445 is engaged on the support block 444. A cleaning needle 446 fixed to the upper end of the clamping sleeve 445 can be inserted into the spray nozzle 457. When clogged, the nozzle 446 is cleaned, and its size is matched with the spray nozzle, effectively ensuring the normal operation of the spray head 457. The spray assembly 45 has three parts; taking one set as an example: one end of each of the two connecting pipes 451 is fixed to the front and rear ends of the water box 442, respectively. A switch valve 452 is provided on the outer surface to control water flow. The other end of the connecting pipe 451 is fixedly connected to the central pipe 453, through which water flows. Both ends of the central pipe 453 are connected to booster pipes 454. A booster pump 455 is installed on the outer surface of the booster pipe 454 to pressurize the water flow, ensuring sufficient pressure to deliver water to the long pipe 456. There are two long pipes 456, with their outer surfaces evenly perforated... A series of spray heads 457 arranged in a fan-shaped path are connected to the precast beams, allowing water to be sprayed onto the precast beams at appropriate angles and ranges, achieving comprehensive and efficient spraying maintenance. The lifting device 4 has a reasonable structural design, and the position of the spraying components 45 can be flexibly adjusted by adjusting the components 44 to meet the maintenance needs of different precast beams. The setting of the observation water level window 41 and the water inlet 46 facilitates the monitoring and replenishment of the water volume in the water storage tank 43. The cleaning needle 446 can promptly deal with the problem of clogging of the spray heads 457, ensuring the stable operation of the device. The fan-shaped arrangement of the spray heads 457 greatly improves the coverage and uniformity of the spraying, thereby improving the maintenance quality and efficiency of highway precast beams.
[0033] In this embodiment, the connecting device 2 includes a left plate 21. A fixing plate 22 is fixedly connected to the upper right end of the left plate 21. An installation groove 23 is opened in the middle of the left end of the left plate 21. Installation screw holes 24 are opened around the left end of the left plate 21. Installation bolts 29 are threaded into the four installation screw holes 24. A fan housing 25 is fixedly connected in the installation groove 23. Installation ear plates 26 are fixedly connected around the outer surface of the fan housing 25. A protective net cover 28 is fixedly connected to the left side of the inner wall of the fan housing 25. A powerful fan 27 is inserted and fixedly connected to the middle of the right end of the fan housing 25. The left plate 21 is fixedly connected to the left end of the water storage tank 43.
[0034] Through the above scheme: the fixing plate 22 fixed to the upper right end of the left plate 21 provides an installation position for the electric push rod 441 in the adjustment component 44, ensuring the stability of the electric push rod 441 during operation, so that it can accurately push the connecting water box 442, thereby adjusting the position of the spray component 45. A mounting groove 23 is opened in the middle of the left end of the left plate 21, in which the fan housing 25 is fixed. The mounting ear plates 26 around the outer surface of the fan housing 25 are threadedly connected to the mounting screw holes 24 around the left end of the left plate 21 by mounting bolts 29. This double fixing method greatly enhances the firmness of the fan housing 25 installation. A powerful fan 27 is inserted and fixedly connected to the middle of the right end of the fan housing 25. When the device is started, the powerful fan 27 operates, generating a powerful... The protective net cover 28 fixed to the left side of the inner wall of the blower casing 25 effectively prevents external debris from entering the interior of the powerful blower 27, avoiding damage to the blower 27 and ensuring stable and long-term operation of the blower 27. The structural design of the connecting device 2 is practical. When the powerful blower 27 is working, it can blow out strong winds to blow away dust, leaves, weeds and other impurities in the precast beam yard of highway bridges, creating good conditions for subsequent spraying operations. This avoids the formation of muddy water by mixing impurities with water during spraying, which would affect the efficiency and maintenance effect of the operation. At the same time, the protective net cover 28 protects the powerful blower 27, extends its service life, reduces equipment maintenance costs, and improves the practicality and reliability of the entire highway precast beam spraying maintenance device.
[0035] It should be noted that this utility model is a spray curing device for precast highway beams. During use, the operator holds the handle 1 and moves the device to the designated location in the highway bridge precast beam yard using the four lockable wheels 3. First, the connecting device 2 is activated, and the left plate 21 is fixed to the left end of the water tank 43. The fan housing 25 is installed in the mounting groove 23 at the left end of the left plate 21, and the powerful fan 27 starts working. The fan housing 25 is securely connected to the left plate 21 via mounting ears 26 and mounting bolts 29. The protective netting cover 28 at its left end prevents foreign objects from entering the fan housing. Inside the powerful blower 27, the strong wind blown by the powerful blower 27 can remove dust, leaves, weeds and other impurities from the beam yard, preparing for subsequent spraying operations. This effectively prevents these impurities from forming a mud-water mixture during spraying, which would affect the efficiency of personnel operations. After the blowing work is completed, the lifting device 4 is operated, and the water tank 43 is filled with water in advance through the water inlet 46. The staff can check the water level through the observation window 41. The electric push rod 441 in the adjusting component 44 is fixed to the left side of the water tank 43 and is fixedly installed at the lower end of the fixing plate 22. The fixing plate 22 is connected to the left plate 21. At the upper right end, the output end of the electric push rod 441 is connected to the connecting water box 442. Activating the electric push rod 441 allows the connecting water box 442 to be adjusted in position. The connecting water box 442 communicates with the interior of the water storage tank 43 via two corrugated telescopic pipes 448. A miniature water pump 447 on the outer surface of the corrugated telescopic pipes 448 transports water from the water storage tank 43 to the connecting water box 442. The connecting water box 442 has three connecting pipe slots 443 at both the front and rear ends, which connect to the connecting pipe 451 of the spray assembly 45. The connecting pipe 451 is equipped with a switch valve 452, and water flows sequentially through the connecting pipe 451. 1. A central pipe 453 and a pressurized water pipe 454 are connected. The pressurized water is pumped by a pump 455 on the pressurized water pipe 454 and flows into a long pipe 456. Several spray heads 457 arranged in a fan-shaped path are evenly connected to the outer surface of the long pipe 456 to achieve spray curing of the precast beam. When the spray nozzles 457 are blocked, the cleaning needles 446 on the clamping cylinder 445, which has a detachable snap-fit structure with the bearing block 444, can be used to clean it. The size of the cleaning needles 446 is adapted to the spray nozzles. Through this operation process of blowing out the block first and then spraying, the efficiency and quality of beam yard cleaning and maintenance work are greatly improved.
[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A spray curing device for precast highway beams, comprising a handle (1), characterized in that: The handle (1) is fixedly connected to a lifting device (4) at both ends. The left end of the lifting device (4) is fixedly connected to a connecting device (2). The lower end of the connecting device (2) and the lower end of the lifting device (4) are both fixedly connected to lockable movable wheels (3). There are four lockable movable wheels (3). The lifting device (4) includes a water tank (43), an observation window (41) for observing water level is provided on the right front end of the water tank (43), a water inlet (46) is provided on the right upper end of the water tank (43), an adjustment component (44) is inserted and connected to the right upper end of the water tank (43), a spray component (45) is fixedly connected to the front and rear ends of the adjustment component (44), a drain pipe (42) is inserted and connected to the lower right end of the water tank (43), three spray components (45) are provided, and the water tank (43) is fixedly connected to the handle (1).
2. The spray curing device for precast highway beams according to claim 1, characterized in that: The adjustment component (44) includes an electric push rod (441), the output end of which is connected to a water box (442). The front and rear ends of the water box (442) are each provided with three connecting pipe slots (443), and there are six connecting pipe slots (443). A support block (444) is fixedly connected to the upper right end of the connecting pipe slot (443). A clamp (445) is snapped into the upper end of the support block (444), and a cleaning needle (446) is fixedly connected to the upper end of the clamp (445). Two corrugated telescopic tubes (448) are fixedly connected to the lower right end of the water box (442). There are two corrugated telescopic tubes (448), and a micro water pump (447) is provided on the outer surface of each of the two corrugated telescopic tubes (448). The electric push rod (441) is fixedly connected to the left side of the water storage tank (43).
3. The spray curing device for precast highway beams according to claim 1, characterized in that: The spraying assembly (45) includes two connecting pipes (451). Each connecting pipe (451) has a switch valve (452) on its outer surface. One end of each connecting pipe (451) is fixedly connected to a central pipe (453). Both ends of each central pipe (453) are fixedly connected to booster water pipes (454). The outer surfaces of the two front booster water pipes (454) and the two rear booster water pipes (454) are... A booster pump (455) is provided. The other ends of the two booster water pipes (454) on the front side and the other ends of the two booster water pipes (454) on the rear side are fixedly connected to a long pipe (456). There are two long pipes (456). Spray heads (457) are inserted and connected to the outer surfaces of the two long pipes (456). There are several spray heads (457). The other ends of the two connecting pipes (451) are fixedly connected to the front end and the rear end of the connecting water box (442) respectively.
4. The spray curing device for precast highway beams according to claim 1, characterized in that: The connecting device (2) includes a left plate (21), a fixing plate (22) is fixedly connected to the upper right end of the left plate (21), an installation groove (23) is opened in the middle of the left end of the left plate (21), and installation screw holes (24) are opened around the left end of the left plate (21). Installation bolts (29) are threaded into the four installation screw holes (24). A fan housing (25) is fixedly connected in the installation groove (23). Installation ear plates (26) are fixedly connected around the outer surface of the fan housing (25). A protective net cover (28) is fixedly connected to the left side of the inner wall of the fan housing (25). A powerful fan (27) is inserted and fixedly connected to the middle of the right end of the fan housing (25). The left plate (21) is fixedly connected to the left end of the water storage tank (43).
5. The spray curing device for precast highway beams according to claim 1, characterized in that: The water storage tank (43) has a concave structure and is connected to the interior of the water box (442) through two corrugated expansion tubes (448).
6. The spray curing device for precast highway beams according to claim 2, characterized in that: The electric push rod (441) is fixedly installed at the lower end of the fixed plate (22), the clamp (445) and the bearing block (444) are detachably clamped, and the size of the cleaning needle (446) is adapted to the spray hole size of several spray heads (457).
7. The spray curing device for precast highway beams according to claim 3, characterized in that: Several spray heads (457) on the left and several spray heads (457) on the right are arranged in a fan-shaped path. Two of the spray heads (457) are connected to the inside of the connecting water box (442) through the pressurized water pipe (454), the central pipe (453) and the connecting pipe (451) in sequence.