A concrete jetting auxiliary device for a foundation pit side wall

Abstract

This utility model belongs to the field of foundation pit construction, and particularly relates to an auxiliary device for concrete spraying on the sidewall of a foundation pit. It includes a trolley with four support columns fixed upwards. A lifting cylinder is slidably connected to each support column, and the top of the lifting cylinder is fixed to the bottom surface of a protective fence. A hydraulic cylinder is installed in the middle of the bottom of the trolley, and the upper end of the hydraulic rod of the hydraulic cylinder is fixed to the center of the bottom surface of the protective fence. Two fixing plates are symmetrically welded to the upper surface of one side of the protective fence, and a fixing shaft is fixed between the two fixing plates. A rotating cylinder is rotatably connected to the fixing shaft, and fasteners are fixed to the outer surface of the rotating cylinder. A nozzle of a spraying pipe is fixed to the fasteners, and the nozzle is connected to the spraying pipe, which is connected to a concrete pump. A rotating handle is fixed to the outer surface of the rotating cylinder, facing the protective fence. This invention eliminates the need for workers to hold the nozzle, greatly reducing labor intensity. Workers only need to rotate the handle to perform multi-angle spraying.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit construction, and in particular relates to an auxiliary device for concrete spraying on the sidewall of a foundation pit. Background Technology

[0002] Shotcrete application between piles is a common construction method in foundation pit support, primarily used to reinforce the sidewalls of foundation pits and prevent soil erosion and collapse. Shotcrete is applied to the sidewalls of the soil between piles using high-pressure jetting equipment, forming a robust protective layer. This layer effectively enhances the soil's shear strength, compressive strength, and durability, thereby improving the stability of the foundation pit and ensuring construction safety and the stability of the surrounding environment. Currently, shotcrete application to foundation pit sidewalls is mostly done by workers directly holding the nozzle of the spray pipe and applying the concrete. This is physically demanding and requires significant physical exertion from the workers. Prolonged spraying can lead to arm pain and muscle fatigue. An auxiliary device is needed to reduce the workers' workload. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an auxiliary device for concrete spraying on the sidewall of a foundation pit.

[0004] This invention is achieved through the following technical solution:

[0005] An auxiliary device for spraying concrete on the sidewall of a foundation pit includes a spraying pipe and a trolley. Four support columns are symmetrically fixed upwards on the bottom plate of the trolley. A lifting cylinder is slidably sleeved on the support columns. The top of the lifting cylinder is fixed to the bottom surface of the base plate of the protective fence. A hydraulic cylinder is installed in the middle of the bottom plate of the trolley, and the upper end of the hydraulic rod of the hydraulic cylinder is fixed to the center of the bottom surface of the base plate. Two fixing plates are symmetrically welded on the upper surface of one side of the protective fence. A fixing shaft is fixed between the two fixing plates. A rotating cylinder is rotatably sleeved on the fixing shaft. Fasteners are fixed on the outer surface of the rotating cylinder. The nozzle of the spraying pipe is fixed on the fasteners. The nozzle is connected to the spraying pipe, and the spraying pipe is connected to a concrete pump. A rotating handle is fixed on the outer surface of the rotating cylinder facing the protective fence.

[0006] Preferably, the fastener is a clamp, which includes an upper clamp and a lower clamp, wherein the lower clamp is fixed to the outer surface of the rotating cylinder and the lower clamp is fixed to the upper clamp.

[0007] Preferably, the rotating handle is positioned diagonally upwards.

[0008] Preferably, the rotating handle is a U-shaped handle.

[0009] Preferably, the vehicle is a four-wheeled flatbed vehicle.

[0010] Preferably, the casters of the trolley are electric rollers.

[0011] Preferably, the trolley is provided with a push handle on its side.

[0012] Preferably, the height of the support column and the height of the lifting cylinder are equal, both being 1-3m.

[0013] The device of this invention can fix the nozzle of the spray pipe to the protective fence, eliminating the need for workers to hold the nozzle, greatly reducing the labor intensity of workers. Workers only need to turn the handle to spray at multiple angles. At the same time, workers can operate while standing inside the protective fence, eliminating the need to manually drag the spray pipe, making it convenient and labor-saving to move. The device of this invention can also be height adjusted to ensure the construction quality of high-point concrete spraying. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0015] Figure 2 This is a schematic diagram of the overall structure from another angle in this embodiment;

[0016] Figure 3 This is a schematic diagram of the trolley structure in this embodiment;

[0017] Figure 4 This is a schematic diagram of the protective fence structure in this embodiment;

[0018] Figure 5 This is an enlarged structural diagram of the clamp in this embodiment;

[0019] Figure 6 This is a magnified structural diagram of the rotating cylinder in this embodiment.

[0020] In the diagram, 1 is the shotcrete pipe, 2 is the trolley, 3 is the support column, 4 is the lifting cylinder, 5 is the protective fence, 6 is the base plate, 7 is the hydraulic cylinder, 8 is the fixing plate, 9 is the fixing shaft, 10 is the rotating cylinder, 11 is the nozzle, 12 is the rotating handle, 13 is the upper half of the clamp, 14 is the lower half of the clamp, and 15 is the push handle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, but not all embodiments.

[0022] This embodiment includes a trolley 2, which comprises a bottom flatbed and casters. The trolley 2 is preferably a four-wheeled flatbed trolley commonly found on construction sites. To facilitate pushing the trolley 2, push handles 15 are preferably provided on both the left and right sides of the trolley 2, allowing the trolley 2 to be moved by pushing the handles 15. Alternatively, the casters can be electric rollers, allowing the movement of the trolley 2 to be directly controlled by a controller.

[0023] Four support columns 3 are symmetrically fixed upwards on the bottom plate of the trolley 2. Lifting cylinders 4 are slidably connected to the support columns 3, with the inner diameter of the lifting cylinders 4 equal to the outer diameter of the support columns 3. The lifting cylinders 4 can slide up and down along the support columns 3. Preferably, the height of the support columns 3 and the height of the lifting cylinders 4 are equal, and the height of the support columns 3 and the height of the lifting cylinders 4 can preferably be 1-3m. The top of the lifting cylinders 4 is fixed to the bottom surface of the base plate 6 of the protective fence 5, and the four lifting cylinders 4 are distributed at the four corners of the base plate 6 of the protective fence 5. A hydraulic cylinder 7 is installed in the middle of the bottom plate of the trolley 2, and the upper end of the hydraulic rod of the hydraulic cylinder 7 is fixed to the center of the bottom surface of the base plate 6 of the protective fence 5. The protective fence 5 can be raised and lowered by the hydraulic cylinder 7, and the four lifting cylinders 4 slide up and down along the support columns 3 during the raising and lowering process. To ensure structural safety and stability during raising and lowering, the height of the lifting cylinders 4 should be controlled to not exceed half the height of the support columns 3. Since the foundation pit excavation needs to be carried out in layers, with each layer not exceeding 3m in depth, if each layer of the foundation pit is shallow, such as 1.5m, then there is no need to slide the lifting cylinder 4 upward along the support column 3 to spray the high points of the foundation pit sidewall well. If each layer of the excavation is 3m deep, the protective fence 5 can be raised to a certain height by the hydraulic cylinder 7, such as 1m, to ensure the quality of the high point spraying. The height of the raising should be controlled to be less than half the height of the support column 3 to prevent the protective fence 5 from becoming unstable.

[0024] Two fixing plates 8 are symmetrically welded to the upper surface of one side of the protective fence 5. A fixing shaft 9 is fixed between the two fixing plates 8. A rotating cylinder 10 is rotatably connected to the fixing shaft 9. The inner diameter of the rotating cylinder 10 is equal to the outer diameter of the fixing shaft 9, and the rotating cylinder 10 can rotate around the fixing shaft 9. Fasteners are fixed to the outer surface of the rotating cylinder 10. The nozzle 11 of the spraying pipe 1 is fixed to the fasteners. The nozzle 11 is connected to the spraying pipe 1, and the spraying pipe 1 is connected to the concrete pump. The concrete pump is used to transport concrete. The concrete pump is a conventional equipment for foundation pit concrete spraying, which will not be described in detail here. In this embodiment, the fastener is a clamp, which includes an upper clamp 13 and a lower clamp 14. The upper clamp 13 and the lower clamp 14 are fixed together by connecting ears and bolts. The lower clamp 14 is fixed to the outer surface of the rotating cylinder 10 and rotates together with the rotating cylinder 10. The nozzle 11 of the shotcrete pipe 1 is placed inside the upper half of the clamp 13 and the lower half of the clamp 14. The nozzle 11 is fixed together with the clamp, so that the nozzle 11 can rotate together with the clamp and the rotating cylinder 10, thereby adjusting the vertical angle of the spray.

[0025] A rotating handle 12 is fixed on the outer surface of the rotating cylinder 10 toward the protective fence 5. The rotating handle 12 is used to rotate the rotating cylinder 10. For easy rotation, the rotating handle 12 is preferably set at an angle upward. In this embodiment, the rotating handle 12 is a U-shaped handle. Workers can adjust the up and down angle of the nozzle 11 by rotating the U-shaped handle while standing inside the protective fence 5.

[0026] During construction, the trolley 2 is placed on the side wall of the foundation pit to be sprayed, and the spray pipe 1 passes through the gap of the protective fence 5. The nozzle 11 is placed in the lower half of the clamp 14 and fixedly connected to the upper half of the clamp 13. The nozzle 11 is fixed in the clamp. The other end of the spray pipe 1 is connected to the concrete pump. Then, the worker enters the protective fence 5, stands on the base plate 6 of the protective fence 5, turns on the concrete pump, and holds the rotating handle 12 to rotate the nozzle 11 to spray the side wall of the foundation pit up and down. If the side wall of the foundation pit is high, the hydraulic cylinder 7 can be turned to raise the protective fence 5 to a certain height to ensure the quality of the high point spraying. When it is necessary to move the spraying position, another worker can push the trolley 2 to move through the push handle 15, or the trolley 2 can be moved through the controller.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An auxiliary device for spraying concrete on the sidewall of a foundation pit, comprising a spraying pipe (1), characterized in that: It also includes a trolley (2), four support columns (3) are symmetrically fixed upward on the bottom plate of the trolley (2), and a lifting cylinder (4) is slidably sleeved on the support column (3). The top of the lifting cylinder (4) is fixed together with the bottom surface of the base plate (6) of the protective fence (5). A hydraulic cylinder (7) is installed in the middle of the bottom plate of the trolley (2). The upper end of the hydraulic rod of the hydraulic cylinder (7) is fixed to the center of the bottom surface of the base plate (6). Two fixing plates (8) are symmetrically welded on the upper surface of one side of the protective fence (5). A fixing shaft (9) is fixed between the two fixing plates (8). A rotating cylinder (10) is rotatably sleeved on the fixing shaft (9). Fasteners are fixed on the outer surface of the rotating cylinder (10). The nozzle (11) of the spraying pipe (1) is fixed on the fasteners. The nozzle (11) is connected to the spraying pipe (1). The spraying pipe (1) is connected to the concrete pump. A rotating handle (12) is fixed on the outer surface of the rotating cylinder (10) facing the protective fence (5).

2. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The fastener is a clamp, which includes an upper clamp (13) and a lower clamp (14), wherein the lower clamp (14) is fixed to the outer surface of the rotating cylinder (10), and the lower clamp (14) is fixed to the upper clamp (13).

3. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The rotating handle (12) is set at an angle upward.

4. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 3, characterized in that: The rotating handle (12) is a U-shaped handle.

5. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The vehicle (2) is a four-wheeled flatbed vehicle.

6. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The casters of the trolley (2) are electric rollers.

7. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The trolley (2) is provided with a push handle (15) on its side.

8. The auxiliary device for spraying concrete on the sidewall of the foundation pit according to claim 1, characterized in that: The support column (3) and the lifting cylinder (4) are at the same height, both 1-3m.

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