Concrete pulp shooting machine

Abstract

The utility model relates to the technical field of concrete shotcreting machines, in particular to a concrete shotcreting machine which comprises a bottom plate, a material storage box is arranged at the position, close to the rear end, above the bottom plate, a smashing assembly is arranged above the material storage box, and the smashing assembly comprises a smashing box, idler wheels symmetrically arranged in the smashing box and two motors arranged on the outer side of the smashing box. A suction pump is arranged at the front end of the storage box, an angle adjusting assembly is arranged at the front end of the suction pump and comprises a rotating base and a telescopic rod, a placement table is welded to the top end of the telescopic rod, and an electric lamp is arranged at the bottom end of the placement table; according to the device, large stones in concrete are screened and crushed by arranging a screen and a crushing assembly, a nozzle is prevented from being blocked by a discharging pipe, angle adjustment of the nozzle is achieved by arranging a rotating base, height adjustment of the nozzle is achieved by arranging a telescopic rod, manpower loss is reduced, illumination is provided for a user by arranging an electric lamp, and the practicability is high. Even under the condition of poor sight, the LED lamp can work normally.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete shotcreting machines, and specifically relates to a concrete shotcreting machine. Background Technique

[0002] In the construction industry, concrete shotcreting is a common construction process, mainly used for the rapid reinforcement and repair of structures such as walls, tunnels, and bridges. The working principle is to use compressed air to transport the premixed concrete mixture through a pipeline to the nozzle of the shotcreting machine, and spray it at high speed onto the sprayed surface, where it quickly coagulates and hardens to form a concrete support layer. The wet shotcrete technology has a wide range of applications in various construction fields due to its simple process and economical cost;

[0003] The utility model with the publication number of CN220469944U discloses a concrete shotcreting machine, including a filter box main body. A filter box cover is hinged to the upper right part of the filter box main body. A filter cylinder penetrates and is slidably connected to the upper part inside the filter box main body. A spiral blade is arranged at the front part inside the filter cylinder. An arc-shaped fence is fixedly connected to the rear end of the spiral blade. A filter net penetrates and is fixedly connected to the front side of the bottom of the filter cylinder. A storage box main body is fixedly connected to the rear side of the filter box main body. A controller is fixedly connected to the middle part on the right side of the storage box main body;

[0004] For the above technical solution, first, the motor drives the spiral blade and the arc-shaped fence. Larger stones and rocks in the concrete are filtered by the spiral blade and the filter net. The filtered stones and rocks are discharged to the outside of the shotcreting machine and collected by the storage box through the arc-shaped fence, avoiding blockage inside the spray pipe caused by the ejection of large stones, thus affecting the normal progress of the shotcreting work and improving the work efficiency; however, in actual use, the machine filtration is not thorough, easily causing blockage of the spray pipe, and there is no angle adjustment device, resulting in a large amount of manual labor during the adjustment of the spray pipe angle. At the same time, there is no lighting device, and it cannot work normally under poor visibility conditions. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a ventilation and heat dissipation device inside the prefabricated cabin to solve the problems raised in the above background technique, that is, a concrete shotcreting machine with the authorization publication number of CN220469944U. However, in actual use, the machine filtration is not thorough, easily causing blockage of the spray pipe, and there is no angle adjustment device, resulting in a large amount of manual labor during the adjustment of the spray pipe angle. At the same time, there is no lighting device, and it cannot work normally under poor visibility conditions.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A concrete shotcrete machine, including a bottom plate, a storage tank is provided near the rear end above the bottom plate, a crushing component is provided above the storage tank, the crushing component includes a crushing box and rollers symmetrically arranged inside the crushing box, and two motors outside the crushing box, the output shafts of the motors are coaxially connected to one end of the rollers, a filtering component is provided above the crushing component, a suction pump is provided at the front end of the storage tank, an angle adjustment component is provided at the front end of the suction pump, the angle adjustment component includes a rotating base and a telescopic rod, a placement table is welded to the top end of the telescopic rod, a lamp is provided at the bottom end of the placement table, and a power supply component is provided at the rear end of the storage tank.

[0008] Preferably, a plurality of support feet are provided at the bottom of the bottom plate, and the support feet are fixedly welded to the bottom plate.

[0009] In the present utility model, the bottom end of the support foot is made of high-strength rubber. By setting the support foot, the stability of the device is improved, the weight of the bottom plate is more evenly distributed on the ground, the pressure on the ground is reduced, and damage to the fragile surface or the device sinking into the soft ground is avoided.

[0010] Preferably, the filtering component includes a feed funnel and a sieve mesh, the sieve mesh is snap-connected to the inner wall of the feed funnel, and the area of the sieve holes of the sieve mesh is less than 2 cm.

[0011] In the present utility model, by setting the feed funnel, the material is accurately guided into the crushing component, avoiding spillage during the feeding process and saving costs. By setting the sieve mesh with a sieve hole area less than 2 cm, large stones in the concrete are prevented from entering the crushing component, preventing the crushing component from getting stuck and affecting the use of the device.

[0012] Preferably, a plurality of crushing teeth are welded on the outer surface of the roller, the distance between the crushing teeth is equal to the width of the crushing teeth, and the distance between the rollers is equal to the length of the crushing teeth. A motor cover is sleeved outside the motor.

[0013] In the present utility model, by setting the distance between the crushing teeth on the roller, the size of the crushed stones is controlled, avoiding large stones from entering the discharge pipe and causing nozzle blockage. The motor coaxially connected to the roller provides power for the crushing teeth on the roller to crush the stones. At the same time, the power output by the two motors is stronger, avoiding power shortage and causing the roller to get stuck. By setting the motor cover, protection is provided for the motor, avoiding external collision of the motor and causing damage to the motor, affecting the service life of the device.

[0014] Preferably, a side cover is provided on the left side of the storage tank, the side cover is rotatably connected to the storage tank through a hinge, a perforation is provided near the edge at the rear side of the side cover, a first threaded hole is provided at the corresponding position of the perforation on the storage tank, a first hand-tightening screw is provided on the perforation, and the first hand-tightening screw passes through the perforation and is threadedly connected to the first threaded hole. An outlet hole is provided near the bottom at the front side of the storage tank.

[0015] In the present utility model, by opening the side cover of the storage bin, it is more convenient to clean the concrete in the storage bin, avoiding incomplete cleaning in the later stage, causing the concrete to coagulate and affecting the use of the storage bin. Through the cooperation of the perforations on the side cover, the first threaded holes on the storage bin, and the first hand-tightening screws, the side cover can be quickly opened and closed.

[0016] Preferably, the inlet of the suction pump is adhesively fixed to one end of the feed pipe, the other end of the feed pipe is adhesively fixed to the discharge hole, a nozzle box is provided on the left side of the suction pump, a discharge pipe is provided inside the nozzle box, and a nozzle is provided at one end of the discharge pipe.

[0017] In the present utility model, the storage bin is connected to the suction pump through the feed pipe, the suction pump is connected to the nozzle through the discharge pipe, and then through the operation of the suction pump, the concrete in the storage bin is sprayed out of the nozzle under pressure.

[0018] Preferably, the rotating base includes a fixed shaft and a rotating shaft. The bottom end of the fixed shaft is welded and fixed to the bottom plate, the rotating shaft is sleeved on the outer wall of the fixed shaft, and the outer wall of the rotating shaft is welded and fixed to the bottom of the telescopic rod.

[0019] In the present utility model, through the rotational connection between the fixed shaft and the rotating shaft, the telescopic rod welded to the rotating shaft can rotate freely, and the fixed shaft is welded and fixed to the bottom plate, increasing the overall stability of the angle adjustment assembly.

[0020] Preferably, a second threaded hole is provided near the top of the telescopic rod, a second hand-tightening screw is provided to match the second threaded hole, a clamping bracket is provided at the top of the placement table, the bottom end of the clamping bracket is welded and fixed to the top of the placement table, and bolts are provided on both the left and right sides of the clamping bracket.

[0021] In the present utility model, through the cooperation of the second threaded hole and the second hand-tightening screw on the telescopic rod, by controlling the friction force between the telescopic rod and the second hand-tightening screw, the adjustment and fixation of the telescopic height of the telescopic rod are realized. By providing a clamping bracket on the placement table and controlling with bolts, the discharge pipe is fixed on the clamping bracket. By controlling the height of the telescopic rod, the spraying height of the nozzle on the discharge pipe is controlled. When it is necessary to spray to a high area, labor loss is saved and work efficiency is improved.

[0022] Preferably, the power supply assembly includes a lithium battery and a battery cover. The battery cover is sleeved on the outer surface of the lithium battery, and the control switches of the lithium battery are electrically connected to the corresponding motor and suction pump through wires respectively.

[0023] In the present utility model, by providing a battery cover outside the lithium battery, the lithium battery is protected from external collisions, improving the service life of the lithium battery. The lithium battery provides power for the motor and the suction pump.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] 1. The utility model screens and crushes large stones in concrete by setting a screen and a crushing component, avoiding large stones from entering the discharge pipe and blocking the nozzle. By setting a rotating base, the angle adjustment of the nozzle is realized. By setting a telescopic rod, the height adjustment of the nozzle is realized, saving labor loss and improving work efficiency. By setting an electric lamp under the placement table, lighting is provided for the user, enabling the user to work normally even under poor visibility conditions;

[0026] 2. The utility model protects the motor and the lithium battery from external collisions and improves the service life of the motor and the lithium battery by sleeving a motor sleeve outside the motor and a battery cover outside the lithium battery. By setting support feet at the bottom end of the bottom plate, the overall stability of the device is improved. By setting two motors, stronger crushing power is provided for the crushing teeth on the rollers, avoiding blockage of the crushing box due to insufficient power. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 is a schematic diagram of the working state of the utility model;

[0029] Figure 3 is an exploded structural schematic diagram of the angle adjustment component of the utility model;

[0030] Figure 4 is a partial exploded structural schematic diagram of the utility model.

[0031] The meanings of the various reference numerals in the figure are as follows:

[0032] 1, bottom plate; 10, support feet;

[0033] 2, filtering component; 20, feeding funnel; 21, screen

[0034] 3, crushing component; 30, crushing box; 31, roller; 310, crushing teeth; 32, motor; 320, motor cover;

[0035] 4, storage box; 40, side cover; 400, perforation; 401, first threaded hole; 41, first hand-tightening screw; 42, discharge hole;

[0036] 5, suction pump; 50, feeding pipe;

[0037] 6, nozzle box; 60, discharge pipe; 61, nozzle;

[0038] 7. Angle adjustment assembly; 70. Rotating base; 700. Fixed shaft; 701. Rotating shaft; 71. Telescopic rod; 710. Second hand-tightening screw; 711. Second threaded hole; 72. Placing table; 720. Clamping bracket; 721. Bolt;

[0039] 8. Electric lamp;

[0040] 9. Power supply assembly; 90. Lithium battery; 91. Battery cover. Detailed implementation manner

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Please refer to Figures 1-4 , this embodiment provides a technical solution:

[0043] A concrete spraying machine includes a bottom plate 1. A plurality of support feet 10 are provided at the bottom of the bottom plate 1, and the support feet 10 are fixedly welded to the bottom plate 1.

[0044] In the present invention, the bottom end of the support foot 10 is made of high-strength rubber. By providing the support foot 10, the stability of the equipment is improved, the weight of the bottom plate 1 is more evenly distributed on the ground, the pressure on the ground is reduced, and damage to the fragile surface or the equipment sinking into the soft ground is avoided.

[0045] Further, a storage box 4 is provided above the bottom plate 1 near the rear end. A side cover 40 is provided on the left side of the storage box 4. The side cover 40 is rotatably connected to the storage box 4 through a hinge. A through hole 400 is opened near the edge at the rear side of the side cover 40. A first threaded hole 401 is opened at the corresponding position of the through hole 400 in the storage box 4. A first hand-tightening screw 41 is provided on the through hole 400. The first hand-tightening screw 41 passes through the through hole 400 and is threadedly connected to the first threaded hole 401. An outlet hole 42 is opened near the bottom at the front side of the storage box 4.

[0046] In the present invention, by opening the side cover 40 of the storage box 4, it is more convenient to clean the concrete in the storage box 4, avoiding incomplete cleaning in the later stage, causing concrete condensation and affecting the use of the storage box 4. Through the cooperation of the through hole 400 on the side cover 40, the first threaded hole 401 on the storage box 4 and the first hand-tightening screw 41, the side cover 40 can be quickly opened and closed.

[0047] Secondly, a crushing assembly 3 is provided above the storage bin 4. The crushing assembly 3 includes a crushing box 30 and rollers 31 symmetrically arranged inside the crushing box 30. A plurality of crushing teeth 310 are welded on the outer surface of the rollers 31. The spacing between the crushing teeth 310 is equal to the width of the crushing teeth 310, and the spacing between the rollers 31 is equal to the length of the crushing teeth 310. A motor cover 320 is sleeved outside the motor 32.

[0048] In the present utility model, by setting the spacing between the crushing teeth 310 on the rollers 31, the size of the crushed stones is controlled to prevent large stones from entering the discharge pipe 60 and causing blockage of the nozzle 61. The motor 32 coaxially connected to the rollers 31 provides power for the crushing teeth 310 on the rollers 31 to crush the stones. At the same time, the power output by the two motors 32 is stronger, avoiding power shortage and causing the rollers 31 to get stuck. By setting the motor cover 320, protection is provided for the motor 32 to prevent external collision of the motor 32 and damage to the motor 32, which affects the service life of the device.

[0049] It should be noted that there are two motors 32 outside the crushing box 30. The output shafts of the motors 32 are coaxially connected to one end of the rollers 31. A filtering assembly 2 is provided above the crushing assembly 3. The filtering assembly 2 includes a feeding funnel 20 and a screen 21. The screen 21 is clamped on the inner wall of the feeding funnel 20, and the area of the screen holes of the screen 21 is less than 2 cm².

[0050] In the present utility model, by setting the feeding funnel 20, the material is guided into the crushing assembly 3 accurately without spillage during the feeding process, saving costs. By setting the screen 21 with a screen hole area less than 2 cm², large stones in the concrete are prevented from entering the crushing assembly 3, preventing the crushing assembly 3 from getting stuck and affecting the use of the device.

[0051] Specifically, a suction pump 5 is provided at the front end of the storage bin 4. The feeding port of the suction pump 5 is adhesively fixed to one end of the feeding pipe 50, and the other end of the feeding pipe 50 is adhesively fixed to the discharge hole 42. A spray pipe box 6 is provided on the left side of the suction pump 5. An outlet pipe 60 is provided inside the spray pipe box 6, and a nozzle 61 is provided at one end of the outlet pipe 60.

[0052] In the present utility model, the storage bin 4 is connected to the suction pump 5 through the feeding pipe 50, the suction pump 5 is connected to the nozzle 61 through the outlet pipe 60, and then through the operation of the suction pump 5, the concrete in the storage bin 4 is sprayed out of the nozzle 61 under pressure.

[0053] Furthermore, an angle adjustment assembly 7 is provided at the front end of the suction pump 5. The rotating base 70 includes a fixed shaft 700 and a rotating shaft 701. The bottom end of the fixed shaft 700 is welded and fixed to the bottom plate 1, and the rotating shaft 701 is sleeved on the outer wall of the fixed shaft 700, and the outer wall of the rotating shaft 701 is welded and fixed to the bottom of the telescopic rod 71.

[0054] In the present utility model, the fixed shaft 700 is rotationally connected to the rotating shaft 701, enabling the telescopic rod 71 welded to the rotating shaft 701 to rotate freely. Moreover, the fixed shaft 700 is fixedly welded to the bottom plate 1, enhancing the overall stability of the angle adjustment assembly 7.

[0055] Specifically, the angle adjustment assembly 7 includes a rotating base 70 and a telescopic rod 71. A second threaded hole 711 is provided near the top of the telescopic rod 71, and a second hand-tightening screw 710 is provided to match the second threaded hole 711. A clamping bracket 720 is provided at the top of the placement table 72. The bottom end of the clamping bracket 720 is fixedly welded to the top of the placement table 72, and bolts 721 are provided on both the left and right sides of the clamping bracket 720.

[0056] In the present utility model, through the mutual cooperation of the second threaded hole 711 and the second hand-tightening screw 710 on the telescopic rod 71, by controlling the friction force between the telescopic rod 71 and the second hand-tightening screw 710, the adjustment and fixation of the telescopic height of the telescopic rod 71 are realized. By providing a clamping bracket 720 on the placement table 72, under the control of the bolts 721, the discharge pipe 60 is fixed on the clamping bracket 720. By controlling the height of the telescopic rod 71, the spraying height of the nozzle 61 on the discharge pipe 60 is controlled. When it is necessary to spray to a high area, labor loss is saved and work efficiency is improved.

[0057] Finally, it should be noted that a placement table 72 is welded to the top end of the telescopic rod 71. An electric lamp 8 is provided at the bottom end of the placement table 72. A power supply assembly 9 is provided at the rear end of the storage tank 4. The power supply assembly 9 includes a lithium battery 90 and a battery cover 91. The battery cover 91 is sleeved on the outer surface of the lithium battery 90. The control switches of the lithium battery 90 are respectively electrically connected to the corresponding motor 32 and suction pump 5 through wires.

[0058] In the present utility model, by providing a battery cover 91 outside the lithium battery 90, the lithium battery 90 is protected from external collisions, improving the service life of the lithium battery 90. The lithium battery 90 provides power for the motor 32 and the suction pump 5.

[0059] When a concrete spraying machine in this embodiment is in use, the user first welds the support feet 10 to the bottom of the bottom plate 1 near the four corners, snaps the screen 21 onto the inner wall of the feed hopper 20, welds the crushing teeth 310 to the outer surface of the roller 31, snaps the roller 31 into the crushing box 30, coaxially connects the output shafts of the two motors 32 to one end of the roller 31 respectively, sleeks the motor cover 320 over the motor 32, welds the feed hopper 20 to the upper opening of the crushing box 30, rotatably connects the side cover 40 to the storage tank 4 through a hinge, closes the side cover 40, passes the first hand-tightening screw 41 through the perforation 400 and threads it into the first threaded hole 401, welds and fixes the bottom of the storage tank 4 above the rear end of the bottom plate 1, adhesively fixes the discharge hole 42 to one end of the feed pipe 50, adhesively fixes the other end of the feed pipe 50 to the feed port of the suction pump 5, welds and fixes the bottom end of the spray pipe box 6 to the bottom plate 1, adhesively fixes the nozzle 61 to one end of the discharge pipe 60, places the discharge pipe 60 into the spray pipe box 6, welds the bottom end of the fixed shaft 700 to the top of the bottom plate 1, sleeks the rotating shaft 701 into the recess of the fixed shaft 700, welds and fixes the bottom end of the telescopic rod 71 to the side wall of the rotating shaft 701, threads the second hand-tightening screw 710 into the second threaded hole 711, welds and fixes one end of the placement table 72 to the top of the telescopic rod 71, welds and fixes the bottom end of the clamping frame 720 to the top surface of the other end of the placement table 72, fixes the electric lamp 8 to the bottom surface of the placement table 72 with screws, and sleeks the battery cover 91 over the outer surface of the lithium battery 90;

[0060] When the concrete spraying machine needs to be used, first the user takes out the discharge pipe 60 from the spray pipe box 6, rotatably connects the end of the discharge pipe 60 far from the nozzle 61 to the discharge port of the suction pump 5, places the other end of the discharge pipe 60 into the clamping frame 720, tightens the bolt 721 to fix the discharge pipe 60, adjusts the angle of the rotating base 70, unscrews the second hand-tightening screw 710, adjusts the height of the telescopic rod 71 to a suitable position, tightens the second hand-tightening screw 710 to fix the height of the telescopic rod 71, turns on the control switch of the lithium battery 90, the motor 32 and the suction pump 5 start to work, the concrete enters the crushing box 30 and under the action of the crushing teeth 310, the large stones in the concrete are crushed, the processed concrete is sent into the storage tank 4, and under the action of the suction pump 5, the concrete in the storage tank 4 is sent to the nozzle 61 and the concrete is sprayed out;

[0061] When the user is in a dark condition, after adjusting the height and rotation angle of the angle adjustment component 7, turn on the electric lamp 8 to continue working. After the device is used, turn off the control switch of the lithium battery 90, and use tap water to flush the inner wall of the feeding hopper 20 and the crushing teeth 310 inside the crushing box 30. Unscrew the first hand-tightening screw 41, open the side cover 40, and clean the residual concrete inside the storage tank 4 to prevent the residual concrete from solidifying into blocks and causing blockage inside the storage tank 4. Unscrew the bolt 721, remove the discharge pipe 60 from the clamping bracket 720, and remove the other end of the discharge pipe 60 from the discharge port of the suction pump 5. Clean the discharge pipe 60, fold the cleaned discharge pipe 60, and place it in the nozzle box 6.

Claims

1. A concrete spraying machine, comprising a bottom plate (1), characterized in that: Above the bottom plate (1) and near the rear end, there is a storage bin (4). Above the storage bin (4), there is a crushing assembly (3). The crushing assembly (3) includes a crushing box (30), rollers (31) symmetrically arranged inside the crushing box (30), and two motors (32) outside the crushing box (30). The output shafts of the motors (32) are coaxially connected to one end of the rollers (31). Above the crushing assembly (3), there is a filtering assembly (2). At the front end of the storage bin (4), there is a suction pump (5). At the front end of the suction pump (5), there is an angle adjustment assembly (7). The angle adjustment assembly (7) includes a rotating base (70) and a telescopic rod (71). The top of the telescopic rod (71) is welded with a placement table (72). At the bottom end of the placement table (72), there is an electric lamp (8). At the rear end of the storage bin (4), there is a power supply assembly (9).

2. The shotcrete machine according to claim 1, characterized in that: At the bottom of the bottom plate (1), there are several support feet (10), and the support feet (10) are welded and fixed to the bottom plate (1).

3. The shotcrete machine according to claim 1, wherein: The filtering assembly (2) includes a feed hopper (20) and a sieve mesh (21). The sieve mesh (21) is snap-fitted to the inner wall of the feed hopper (20), and the area of the sieve holes of the sieve mesh (21) is less than 2 cm².

4. The concrete spraying machine according to claim 1, wherein: On the outer surface of the roller (31), there are several crushing teeth (310). The spacing between the crushing teeth (310) is equal to the width of the crushing teeth (310), and the spacing of the rollers (31) is equal to the length of the crushing teeth (310). The outside of the motor (32) is sleeved with a motor cover (320).

5. The shotcrete machine according to claim 1, wherein: On the left side of the storage bin (4), there is a side cover (40). The side cover (40) is rotatably connected to the storage bin (4) through a hinge. Near the edge at the rear side of the side cover (40), there is a perforation (400). At the corresponding position of the perforation (400) on the storage bin (4), there is a first threaded hole (401). On the perforation (400), there is a first hand-tightening screw (41). The first hand-tightening screw (41) passes through the perforation (400) and is threadedly connected to the first threaded hole (401). Near the bottom at the front side of the storage bin (4), there is a discharge hole (42).

6. The shotcrete machine according to claim 5, characterized in that: The inlet of the suction pump (5) is adhesively fixed to one end of a feed pipe (50). The other end of the feed pipe (50) is adhesively fixed to the discharge hole (42). On the left side of the suction pump (5), there is a spray pipe box (6). Inside the spray pipe box (6), there is a discharge pipe (60). One end of the discharge pipe (60) is provided with a nozzle (61).

7. The shotcrete machine according to claim 1, characterized in that: The rotating base (70) includes a fixed shaft (700) and a rotating shaft (701). The bottom end of the fixed shaft (700) is welded and fixed to the bottom plate (1). The rotating shaft (701) is sleeved on the outer wall of the fixed shaft (700), and the outer wall of the rotating shaft (701) is welded and fixed to the bottom of the telescopic rod (71).

8. The shotcrete machine according to claim 7, characterized in that: A second threaded hole (711) is provided near the top of the telescopic rod (71), and a second hand-tightening screw (710) is provided in cooperation with the second threaded hole (711). A clamping bracket (720) is provided at the top of the placement table (72). The bottom end of the clamping bracket (720) is fixedly welded to the top of the placement table (72), and bolts (721) are provided on both the left and right sides of the clamping bracket (720).

9. The shotcrete machine according to claim 1, characterized in that: The power supply assembly (9) includes a lithium battery (90) and a battery cover (91). The battery cover (91) is sleeved on the outer surface of the lithium battery (90). The control switches of the lithium battery (90) are electrically connected to the corresponding motors (32) and suction pumps (5) through wires respectively.

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