Simple trolley for spraying concrete

Abstract

The utility model belongs to the technical field of tunnel construction, and relates to a simple concrete spraying trolley which comprises an arc-shaped frame trolley system, a surrounding rock profiling trolley system, a mold spraying trolley system and a spray gun system which are installed on the simple concrete spraying trolley. And a module assembling mode is adopted, profiling mold spraying can be achieved, and automatic and continuous concrete spraying can also be achieved. Waste of springback materials can be greatly reduced, the cost is reduced, the flatness of a sprayed concrete surface can be improved, the construction efficiency is improved, the structure is simple, the cost is low, and the device is suitable for large, medium and small tunnel and subway engineering construction.

Description

Technical Field

[0001] The utility model relates to a concrete spraying device for underground projects such as tunnels and subways, and a simple trolley for spraying concrete. Background Art

[0002] At present, in the spraying operation of concrete in large tunnel construction in China, a vehicle-mounted concrete spraying manipulator is mostly used to replace manual concrete spraying, which indeed improves the efficiency. However, it also has four problems:

[0003] ① There is still rebound material, and there is even a large amount of rebound in some parts. Once these rebound materials fall to the ground, they cannot be used again and become waste, wasting a large amount of concrete materials and increasing the construction cost.

[0004] ② The sprayed surface still cannot be made flat, with high and low, concave and convex. This situation makes the subsequent operation difficult. For example, the waterproof board cannot be laid flat. If there is a big pit behind the laid waterproof board, when pouring concrete in the secondary lining of the tunnel, the waterproof board will be broken, affecting the waterproof effect and reducing the construction quality of the tunnel.

[0005] ③ The cost of a vehicle-mounted concrete spraying manipulator is too high, increasing the construction cost of the construction unit. Small and medium-sized projects generally cannot afford it and have to use manual concrete spraying.

[0006] ④ It has high requirements for operators. During the process of spraying concrete in the tunnel, it is necessary to operate in six directions of front and back, left and right, high and low in three dimensions. A person's two hands cannot continuously operate three operation handles. In addition, the size of the air volume and the amount of accelerator need to be adjusted. The operator is in a hurry. This is also the main reason why the sprayed surface cannot be made flat, and it is even more impossible to achieve automated spraying operation. Summary of the Invention

[0007] In order to solve the problems of current shotcrete equipment, the utility model designs a simple shotcrete trolley, which is composed of a gantry trolley, an arc-frame trolley system, a surrounding-rock profiling trolley system, a form-spraying trolley system and a spray gun system. The gantry trolley is composed of two driving wheel sets, two driven wheel sets, two bottom longitudinal beams, two upper longitudinal beams, four columns and two upper cross beams. One driving wheel set and one driven wheel set are installed under each bottom longitudinal beam. Two columns are installed on each bottom longitudinal beam. One upper longitudinal beam is used to connect the upper ends of the two columns. The two upper cross beams connect the two groups of columns to form a gantry trolley. Two trolley traveling motors are respectively installed on the two bottom longitudinal beams. The sprocket B on the rotating shaft of the trolley traveling motor drives the sprocket A on the driving wheel set to rotate through the chain A, so as to drive the whole gantry trolley to travel. The arc-frame trolley system is installed on the gantry trolley through a number of arc-frame support rods. The two telescopic rods and a cylinder A at the front end of the arc-frame trolley system are connected to the surrounding-rock profiling trolley system. The form-spraying trolley system is installed at the front of the two profiling longitudinal beams of the surrounding-rock profiling trolley system. The spray gun system is installed on the form-spraying trolley cross bar of the form-spraying trolley system through the spray gun system mounting plate.

[0008] The described arc-frame trolley system is composed of two arc-shaped frames, an arc-shaped trolley, and several arc-frame support rods. The shapes of the two arc-shaped frames are similar to the tunnel contour. The two arc-shaped frames are arranged facing each other and are installed around the gantry trolley through several arc-frame support rods. Each arc-frame support rod is installed on the outer sides of the two arc-shaped frames. The arc-shaped trolley is installed between the two arc-shaped frames. A rack is installed on the outer surface of the outer arc plate of each arc-shaped frame. The arc-shaped trolley is composed of two gear A's, two driven wheels, a driving wheel shaft, a driven wheel shaft, two wheel shaft support plates, four protective wheels, two protective wheel shafts, two telescopic rods, a cylinder A, a supporting connecting crossbar, and two hydraulic motors A. The driving wheel shaft, the driven wheel shaft, and the two protective wheel shafts are respectively installed into the corresponding installation holes on the two wheel shaft support plates to form an integral body. The two wheel shaft support plates are located inside the two arc-shaped frames. A supporting connecting crossbar is installed in the middle of the lower ends of the two wheel shaft support plates. A gear A is installed at each end of the driving wheel shaft. A bearing seat is installed at the connection between the driving wheel shaft and the two wheel shaft support plates respectively. The two gear A's rotate together with the driving wheel shaft. The two gear A's are respectively engaged with the two racks. The two hydraulic motors A are respectively installed on the two wheel shaft support plates. Both of these two hydraulic motors A are equipped with braking mechanisms. A driving gear B is installed on the output shaft of each hydraulic motor A. The two driving gear B's are respectively engaged with the two gear A's. A driven wheel is installed at each end of the driven wheel shaft. Both of the two driven wheels are double-rim wheels. The double rims of the driven wheels run along the outer surface of the outer arc plate of the arc-shaped frame. Bearings are installed inside both of the two driven wheels. Two protective wheels are installed at each end of the two protective wheel shafts. Bearings are installed inside all four protective wheel shafts. The four protective wheel shafts are installed on the inner sides of the outer arc plates of the two arc-shaped frames and are respectively located near the gear A and the driven wheels. The lower ends of the two telescopic rods and a cylinder A are hinged to the supporting connecting crossbar. The front ends of the two telescopic rods are respectively bolted to between the two profiling crossbeams of the profiling trolley system. The front end of the piston rod of the cylinder A is hinged to a profiling crossbeam of the profiling trolley system. The telescopic rod connecting members connect the outer tubes of the two telescopic rods into one body. A groove-shaped hole is machined in the middle of the upper part of each of the two wheel shaft support plates. A travel switch A is installed at the left end of each groove-shaped hole, and a travel switch B is installed at the right end of the groove-shaped hole. A swing shaft is installed on the outer side of each telescopic rod at a position corresponding to the groove-shaped hole. The length of the swing shaft exceeds the wheel shaft support plate. The pneumatic control components of the cylinder A are composed of a three-position four-way directional control valve, a safety valve, a pressure reducing valve, and an air filter. The safety valve is installed near the air inlet of the large chamber of the cylinder A. The pressure reducing valve and the air filter are installed on the air inlet pipeline of the cylinder A. The three-position four-way directional control valve is simultaneously connected to the two air inlets of the cylinder A.

[0009] The profiling trolley system of the described shotcrete simple trolley consists of two profiling longitudinal beams, several profiling cross beams, one profiling wheel shaft, several profiling wheels, one hydraulic motor B, one sprocket C, one sprocket D, and one chain B. Multiple profiling wheels and one sprocket D are installed on the profiling wheel shaft. The profiling wheels rotate together with the profiling wheel shaft and the sprocket D. The profiling wheel shaft is installed on multiple profiling cross beams at the right end of the profiling trolley system through multiple bearing seats and is located at the midline position between the two profiling longitudinal beams. The profiling wheels and the profiling wheel shaft are located on the outside of the profiling trolley system. The hydraulic motor B is installed on one profiling cross beam at the right end of the profiling longitudinal beam. One sprocket C is installed on the output shaft of the hydraulic motor B. The sprocket C forms a transmission relationship with the sprocket D through the chain B.

[0010] The shotcreting trolley system of the described gantry-type automated profiling shotcreting trolley for tunnel construction is located at the left end of the profiling longitudinal beam. It consists of cylinder B, two shotcreting trolley cross bars, four shotcreting trolley wheels, four shotcreting trolley wheel shafts, one shotcreting conical barrel fixing flange, one shotcreting conical barrel, two shotcreting tracks, two outer fixing plates for shotcreting trolley wheels, two inner fixing plates for shotcreting trolley wheels, one left travel switch C, one right travel switch D, one distance measuring instrument A on the left side of the shotcreting conical barrel, and one distance measuring instrument B on the right side of the shotcreting conical barrel. The two shotcreting tracks are respectively installed on the inner sides of the two profiling cross beams. Two shotcreting trolley wheels and two wheel shafts are installed in the middle between one inner fixing plate for shotcreting trolley wheels and one outer fixing plate for shotcreting trolley wheels to form a walking mechanism on one side. The two ends of the two walking mechanisms are connected to the two shotcreting trolley cross bars to form a rectangular trolley. The shotcreting trolley wheels have double flanges and run on the tracks. The shotcreting conical barrel fixing flange and the shotcreting conical barrel are integrated. The shotcreting conical barrel is installed on the two outer fixing plates for shotcreting trolley wheels through bolts. The shotcreting conical barrel consists of a conical barrel body and a shotcreting forming flange. The taper of the conical barrel body is greater than the brushing trajectory of the concrete after it comes out of the spray gun. The shotcreting forming flange is located at the end of the conical barrel body and is in a straight line with the profiling wheel, both on the shotcrete forming surface. The distance measuring instruments A and B are respectively installed on both sides of the shotcreting conical barrel. The left travel switch C is installed on the profiling cross beam on the left side of the shotcreting trolley system. The right travel switch D is installed at an appropriate position on the right side of the shotcreting trolley system. The front end of the piston rod of the cylinder B is hinged to the shotcreting trolley cross bar on the right side of the shotcreting trolley system, and the rear end of the cylinder B is hinged to the right profiling cross beam.

[0011] The spray gun system of the described gantry - type automatic profiling die - spraying trolley for tunnel construction consists of a spray gun, a compressed air and accelerator addition pipe, a spray gun fixing plate, a concrete delivery rubber hose, a spray gun brushing frame, a universal joint, a spray gun swing frame, a swing motor, an eccentric wheel disc, and a spray gun system mounting plate. The front end of the spray gun is inserted into the die - spraying conical cylinder. The spray gun is installed on the spray gun brushing frame through the fixing plate. The rear end of the spray gun brushing frame is connected to the swing frame through a universal joint. The front end of the spray gun brushing frame is connected to the eccentric wheel disc. The swing motor is installed at the front of the swing frame, and the eccentric wheel disc is installed on the output shaft of the swing motor. One end of the spray gun system mounting plate is connected to the spray gun swing frame, and the other end is integrally connected to the die - spraying trolley cross bar on one side of the die - spraying trolley system.

[0012] The cylinder A and cylinder B of the described simple - type spraying trolley for shotcrete can be replaced with hydraulic cylinders.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The contour of the die - spraying conical cylinder is larger than the contour during concrete spraying. Therefore, it can collect most of the rebound materials, and under the action of subsequent high - pressure gas, the rebounded concrete materials can be sprayed onto the tunnel surrounding rock again for reuse, greatly reducing the waste of rebound materials and the construction cost.

[0015] 2. Two distance measuring instruments are arranged on both sides of the die - spraying conical cylinder, which can ensure no under - spraying and no depression. Even if over - spraying occurs, it will be scraped off by the die - spraying forming flange, and the scraped - off concrete materials will fall into the conical cylinder and will soon be sprayed onto the sprayed surface by the subsequent concrete, making the sprayed surface flat and achieving the die - spraying effect.

[0016] 3. Since the wheels of the profiling trolley system move on the already - sprayed formed surface, this die - spraying is also profiling die - spraying, and the die - spraying contour of each cycle is the same, just like making a key by profiling.

[0017] 4. This invention adopts a modular design, and each subsystem completes different actions, which is easy to realize the automatic shotcrete operation, just like a printer printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following describes the specific embodiments of the present utility model in conjunction with the drawings:

[0019] Figure 1 Longitudinal sectional structure schematic diagram of the simple - type spraying trolley for shotcrete

[0020] Figure 2 Right - view structure schematic diagram of the simple - type spraying trolley for shotcrete

[0021] Figure 3 A - A sectional structure schematic diagram of the simple - type spraying trolley for shotcrete

[0022] Figure 4 Schematic Diagram of the Cross-section Structure of the B-B Section of the Simple Shotcrete Trolley

[0023] Figure 5 Schematic Diagram of the Cross-section Structure of the C-C Section of the Simple Shotcrete Trolley

[0024] Figure 6 Schematic Diagram of the Right View when the Arc-shaped Cart of the Simple Shotcrete Trolley Starts to Move

[0025] Figure 7 Schematic Diagram of the Right View when the Arc-shaped Cart of the Simple Shotcrete Trolley Stops Moving

[0026] Figure 8 Pneumatic Schematic Diagram when Cylinder A of the Simple Shotcrete Trolley is Working

[0027] Figure 9 Pneumatic Schematic Diagram when the Piston Rod of Cylinder A of the Simple Shotcrete Trolley Retracts

[0028] Figure 10 Pneumatic Schematic Diagram when Cylinder A of the Simple Shotcrete Trolley is Not Working

[0029] Among them, 1 - driving wheel set, 2 - sprocket A, 3 - bottom longitudinal beam, 4 - chain A, 5 - column, 6 - sprocket B, 7 - trolley traveling motor, 8 - driven wheel set, 9 - upper longitudinal beam, 10 - upper cross beam, 11 - gantry trolley, 12 - arc-shaped frame support rod, 13 - arc-shaped trolley, 14 - wheel axle support plate, 15 - telescopic rod, 16 - arc-shaped frame, 17 - protective wheel, 18 - protective wheel axle, 19 - arc-shaped rack, 20 - driving wheel axle, 21 - gear A, 22 - cylinder A, 23 - hydraulic motor B, 24 - surrounding rock profiling trolley system, 25 - profiling cross beam, 26 - sprocket C, 27 - profiling wheel axle, 28 - profiling wheel, 29 - sprocket D, 30 - chain B, 31 - profiling longitudinal beam, 32 - bearing seat, 33 - cylinder B, 34 - shotcrete trolley system, 35 - shotcrete trolley cross bar, 36 - shotcrete trolley wheel, 37 - shotcrete trolley wheel axle, 38 - shotcrete conical cylinder fixed flange, 39 - shotcrete conical cylinder, 40 - shotcrete track, 41 - outer fixing plate of shotcrete trolley wheel, 42 - inner fixing plate of shotcrete trolley wheel, 43 - spray gun, 44 - compressed air and accelerator adding pipe, 45 - spray gun fixing plate, 46 - concrete conveying rubber hose, 47 - spray gun brushing frame, 48 - universal joint, 49 - spray gun system, 50 - spray gun swing frame, 51 - swing motor, 52 - eccentric wheel disc, 53 - spray gun system mounting plate, 54 - telescopic rod connecting member, 55 - electrical control system, 56 - hydraulic control system, 57 - travel switch B, 58 - swing shaft, 59 - hydraulic motor A, 60 - driving gear B, 61 - driven wheel, 62 - travel switch A, 63 - driven wheel axle, 64 - arc-shaped frame trolley system, 65 - left distance measuring instrument A, 66 - right distance measuring instrument B, 67 - left travel switch C, 68 - right travel switch D, 69 - supporting connecting cross bar, 70 - slotted hole, 71 - air compressor, 72 - air filter, 73 - pressure reducing valve, 74 - three-position four-way directional control valve, 75 - safety valve, 76 - traveling mechanism, 77 - conical cylinder body, 78 - shotcrete forming flange Detailed implementation manners

[0030] I. Prepare for shotcrete.

[0031] 1. Move the shotcrete trolley so that the horizontal movement range of the shotcrete conical cylinder (39) is just within the range where concrete needs to be sprayed.

[0032] 2. Connect the concrete conveying rubber hose for spraying, various power lines, and various pipelines.

[0033] 3. Lower the shotcrete trolley system (34) to the lowest point of the tunnel and start spraying concrete from the bottom of the tunnel.

[0034] 4. Keep the directional control valve (74) of the cylinder A (22) in Figure 8In the state shown, keep supplying high-pressure gas to the large chamber of cylinder A (22) during the shotcrete process. Adjust the pressure reducing valve (73) so that the reduced air pressure is less than or equal to the set air pressure of the safety valve, and press the profiling trolley system (22) against the already shotcreted concrete surface with appropriate air pressure.

[0035] II. Start the shotcrete operation

[0036] Start the concrete delivery pump to start delivering concrete to the spray gun. At the same time, start the control system of the formwork shotcrete trolley.

[0037] 1. The spray gun (43) starts to spray concrete. At the same time, the spray gun takes the universal joint as the cone vertex and makes a conical contour movement.

[0038] 2. Start the longitudinal concrete spraying operation.

[0039] The piston rod of cylinder B (33) slowly contracts, pulling the profiling trolley system (34) with the spray gun system (49) to move to the right together, spraying concrete while moving (see Figure 1 and Figure 4 ). When the profiling trolley system (34) touches the right travel switch D (68), the electromagnetic commutation of cylinder B (33) starts to commutate, and the piston rod of cylinder B (33) starts to extend, pushing the profiling trolley system (34) to move to the left. When the profiling trolley system (34) touches the left travel switch C (67), the electromagnetic commutation of cylinder B (33) commutates again, and the piston rod of cylinder B (33) starts to contract, pulling the profiling trolley system (34) to move to the right. Repeat this way to carry out the longitudinal concrete spraying operation.

[0040] During the process of spraying concrete while moving, due to the high spraying wind pressure and the fast speed of the sprayed concrete, there will always be some rebound materials. A part of these rebound materials is blocked back by the profiling flange of the formwork spraying and falls onto the sprayed surface and is reused. Another part of the rebound materials enters the conical cylinder (39). These rebound materials are carried by the subsequent concrete and are sprayed onto the sprayed surface again and reused, without falling to the ground to become waste materials. Only a very small part of the rebound materials falls to the ground.

[0041] Since the profiling flange (78) of the formwork spraying conical cylinder (39) moves along the profiling contour of the sprayed concrete, even if there is over-sprayed concrete, it will be scraped off by the profiling flange (78), fall into the conical cylinder, and then be sprayed onto the sprayed surface of the tunnel by the subsequent concrete and be utilized without waste.

[0042] 3. Start the circumferential movement.

[0043] When the piston rod of cylinder B (33) starts to extend and pushes the shotcrete trolley system (34) to move leftward, the rangefinder B (66) on the right side senses it, indicating that the thickness of the shotcrete meets the requirements. When the shotcrete trolley system (34) touches the left travel switch C (67), the hydraulic motor B (23) starts to rotate, driving the profiling wheel shaft (27) and the profiling wheel (28) to rotate through the sprocket C (26), chain B (30) and sprocket D (29), so that the profiling trolley system (24) drives the shotcrete trolley system (34) and the spray gun system (49) to move upward together for an appropriate distance and then stop.

[0044] Then, the electromagnetic commutation of cylinder B (33) starts to commutate, and the piston rod of cylinder B (33) starts to contract, pulling the shotcrete trolley system (34) to move rightward, and repeating action 2 in this way.

[0045] When the piston rod of cylinder B (33) pulls the shotcrete trolley system (34) to move rightward, the rangefinder A (65) on the left side senses it, indicating that the thickness of the shotcrete meets the requirements. When the shotcrete trolley system (34) touches the right travel switch C (68), the hydraulic motor B (23) starts to rotate again, driving the profiling wheel shaft (27) and the profiling wheel (28) to rotate through the sprocket C (26), chain B (30) and sprocket D (29), so that the profiling trolley system (24) drives the shotcrete trolley system (34) and the spray gun system (49) to move upward together for an appropriate distance and then stop.

[0046] Then, the electromagnetic directional control valve of cylinder B (33) starts to commutate, and the piston rod of cylinder B (33) starts to extend, pushing the shotcrete trolley system (34) to move leftward.

[0047] Repeat action 2 and action 3 continuously in this way.

[0048] During the circumferential movement, action 1 and action 2 are also carried out simultaneously.

[0049] 4. Movement of the arc-shaped trolley (13)

[0050] Every time the profiling trolley system (24) moves upward, the cylinder A (22) and the two telescopic rods (15) will extend slightly and also have a small swing. When the profiling trolley system (24) moves upward multiple times, the cylinder A (22) and the two telescopic rods (15) will have a larger elongation and a larger swing angle, and the telescopic rod will touch the travel switch B (57) (see Figure 6 ). At this time, the two hydraulic motors A (59) start to rotate, and through the meshing of the driving gear B (60) and the gear A (21), drive the arc-shaped trolley (13) to move upward along the rack (19).

[0051] During the upward movement, the air pressure in the large chamber of cylinder A (22) will increase. When the air pressure is greater than the air pressure value set by the safety valve, the safety valve will release pressure and deflate, so that the air pressure in the large chamber of cylinder A (22) always remains at a stable value.

[0052] Since the large chamber of cylinder A (22) has been in a state of supplying air, the air pressure in the large chamber can be kept stable.

[0053] When the two hydraulic motors A (59) continue to rotate, through the meshing of the driving gear B (60) and gear A (21), the arc-shaped trolley (13) is driven to continue moving upward along the rack (19), and the telescopic rod will collide with the travel switch A (62). (See Figure 7 ), at this time, the hydraulic motor A (59) stops rotating and is in a braking state.

[0054] During the movement of the arc-shaped trolley (13), Action 1, Action 2 and Action 3 are running simultaneously.

[0055] According to the automatic control of the above actions, it is continuously repeated until the concrete spraying on one side of the tunnel is completed. Then, the profiling trolley system (24), the die spraying trolley system (34) and the spray gun system (49) are transferred to the lower part of the other side of the tunnel, and the concrete is sprayed continuously according to the above method until all the concrete is sprayed.

[0056] 5. Closing steps

[0057] (1) Adjust the three-position four-way reversing valve of cylinder A (22) to Figure 9 the state shown, and cylinder A (22) and the two telescopic rods all retract

[0058] (2) Adjust the three-position four-way reversing valve of cylinder A (22) to Figure 10 the state shown,

[0059] (3) Start the hydraulic motor A (59) and move the arc-shaped frame trolley (13) to an appropriate position.

Claims

1. A simple concrete spraying trolley, which comprises a gantry trolley (11), an arc frame trolley system (64), a surrounding rock profiling trolley system (24), a mold spraying trolley system (34) and a spray gun system (49), wherein the gantry trolley (11) comprises two driving wheel groups (1), two driven wheel groups (8), two bottom longitudinal beams (3), two upper longitudinal beams (9), four columns (5) and two upper cross beams (10), wherein a driving wheel group (1) and a driven wheel group (8) are installed below each bottom longitudinal beam (3), two columns (5) are installed above each bottom longitudinal beam (3), and the upper ends of the two columns (5) are connected by an upper longitudinal beam (9), and the two upper cross beams (10) connect the two groups of columns (5) to form a gantry trolley (11), and the trolley travel motor (7) are respectively installed on the two bottom longitudinal beams (3), the sprocket B (6) on the rotating shaft of the trolley travel motor (7) drives the sprocket A (2) on the driving wheel group (1) to rotate through the chain A (4), thereby driving the entire gantry trolley (11) to travel, the arc frame trolley system (64) is installed on the gantry trolley (11) through a plurality of arc frame support rods (12), the two telescopic rods (15) and a cylinder A (22) of the arc frame trolley system (64) are connected to the surrounding rock profiling trolley system (24) at the front end, the mold spraying trolley system (34) is installed on the front part of the two profiling longitudinal beams (31) of the surrounding rock profiling trolley system (24), and the spray gun system (49) is installed on the mold spraying trolley cross bar (35) of the mold spraying trolley system (34) through the spray gun system mounting plate (53), which is characterized in that: An arc frame trolley system (64), a surrounding rock profiling trolley system (24), a mold spraying trolley system (34) and a spray gun system (49) are installed on the gantry trolley (11).

2. The simple shotcrete trolley according to claim 1 is characterized in that: The arc frame trolley system (64) is composed of two arc frames (16), an arc trolley (13) and a plurality of arc frame support rods (12). The shapes of the two arc frames (16) are similar to the tunnel profile. The two arc frames (16) are arranged facing each other and are mounted on the gantry trolley (11) through a plurality of arc frame support rods (12). Each arc frame support rod (12) is mounted on the outside of the two arc frames (16). The arc trolley (13) is mounted between the two arc frames (16). A rack (19) is mounted on the outer surface of the outer arc plate of each arc frame (16). The arc trolley (13) is composed of two gears A (21), two driven wheels (61), a driving wheel shaft (20), and a driven wheel shaft (21). The invention relates to a driving wheel shaft (63), two wheel shaft support plates (14), four protection wheels (17), two protection wheel shafts (18), two telescopic rods (15), a cylinder A (22), a supporting connecting cross bar (69) and two hydraulic motors A (59). The driving wheel shaft (20), the driven wheel shaft (63) and the two protection wheel shafts (18) are respectively installed in corresponding installation holes on the two wheel shaft support plates (14) to form a whole. The two wheel shaft support plates (14) are located on the inner side of the two arc-shaped frames (16). A supporting connecting cross bar (69) is installed in the middle of the lower ends of the two wheel shaft support plates (14). A gear A (21) is installed at both ends of the driving wheel shaft (20). ) and the two wheel axle support plates (14) are connected with a bearing seat respectively, two gears A (21) and the driving wheel axle (20) rotate together, the two gears A (21) are respectively meshed with the two racks (19), two hydraulic motors A (59) are respectively installed on the two wheel axle support plates (14), the two hydraulic motors A (59) are provided with a brake mechanism, a driving gear B (60) is respectively installed on the output shaft of each hydraulic motor A (59), the two driving gears B (60) are respectively meshed with the two gears A (21), a driven wheel (61) is respectively installed at both ends of the driven wheel axle (63), the two driven wheels (61) are both double-rim wheels, and the double rims of the driven wheels (61) are along the outer arc of the arc frame (16) The outer surface of the plate is walked, and bearings are installed inside the two driven wheels (61). Two protection wheels (17) are installed at both ends of the two protection wheel shafts (18). Bearings are installed in the four protection wheel shafts (18). The four protection wheel shafts (18) are installed on the inner side of the outer arc plate of the two arc frames (16) and are respectively located near the gear A (21) and the driven wheel (61). The lower ends of the two telescopic rods (15) and a cylinder A (22) are hinged to the supporting connecting cross bar (69). The front ends of the two telescopic rods (15) are respectively connected to the two profiling beams (25) of the profiling trolley system (24) by bolts. The front end of the piston rod of the cylinder A (22) is hinged to a profiling beam (25) of the profiling trolley system (24).The telescopic rod connecting rod (54) connects the outer tubes of the two telescopic rods (15) into one body. A slotted hole (70) is processed in the middle of the upper part of the two wheel axle supporting plates (14). A travel switch A (62) is installed at the left end of each slotted hole (70), and a travel switch B (57) is installed at the right end of the slotted hole (70). A swing shaft (58) is installed at the outer side of each telescopic rod (15) and at a position corresponding to the slotted hole (70). The length exceeds the wheel axle support plate (14). The pneumatic control element of the cylinder A (22) is composed of a three-position four-way reversing valve (74), a safety valve (75), a pressure reducing valve (73) and an air filter (72). The safety valve is installed near the air inlet of the large cavity of the cylinder A (22). The pressure reducing valve (73) and the air filter (72) are installed on the air inlet pipeline of the cylinder A (22). The three-position four-way reversing valve (74) is connected to the two air inlets of the cylinder A (22) at the same time.

3. The simple shotcrete trolley according to claim 1 is characterized in that: The profiling trolley system (24) is composed of two profiling longitudinal beams (31), a plurality of profiling cross beams (25), a profiling wheel shaft (27), a plurality of profiling wheels (28), a hydraulic motor B (23), a sprocket C (26), a sprocket D (29) and a chain B (30). The profiling wheel shaft (27) is provided with a plurality of profiling wheels (28) and a sprocket D (29). The profiling wheel (28) rotates together with the profiling wheel shaft (27) and the sprocket D (29). The profiling wheel shaft (27) is connected to the profiling wheel shaft through a plurality of bearing seats ( The hydraulic motor B (23) is mounted on a plurality of profiling beams (25) at the right end of the profiling trolley system (24) and is located at the midline position between the two profiling longitudinal beams (31). The profiling wheel (28) and the profiling wheel axle (27) are located outside the profiling trolley system (24). The hydraulic motor B (23) is mounted on a profiling beam (25) at the right end of the profiling longitudinal beam (31). A sprocket C (26) is mounted on the output shaft of the hydraulic motor B (23). The sprocket C (26) forms a transmission relationship with the sprocket D (29) through the chain B (30).

4. The simple shotcrete trolley according to claim 1 is characterized in that: The spray trolley system (34) is located at the left end of the profiled longitudinal beam (31), and is composed of a cylinder B (33), two spray trolley cross bars (35), four spray trolley wheels (36), four spray trolley wheel axles (37), a spray cone cylinder fixing flange (38), a spray cone cylinder (39), two spray rails (40), two spray trolley wheel outer fixing plates (41), two spray trolley wheel inner fixing plates (42), a left travel switch C (67), a right travel switch D (68), a spray cone cylinder (39) on the left side. The invention relates to a trolley comprising a distance meter A (65) on the right side of the cone and a distance meter B (66) on the right side of the cone, two mold-sprayed tracks (40) are respectively installed on the inner sides of two contoured beams (25), two mold-sprayed wheels (36) and two mold-sprayed wheel axles (37) are installed in the middle between an inner fixing plate (42) of a mold-sprayed wheel and an outer fixing plate (41) of a mold-sprayed wheel, forming a running mechanism (76) on one side, and the two ends of the two running mechanisms (76) are connected to the two mold-sprayed trolley cross bars (35) as a whole to form a rectangular trolley, and the mold-sprayed wheels are arranged on the inner side of the mold-sprayed wheel. The mold spray cone (36) is a double wheel flange, riding on the track (40), the mold spray cone cylinder fixing flange (38) and the mold spray cone cylinder (39) are connected as a whole, and the mold spray cone cylinder (39) is installed on the outer fixing plate (41) of the two mold spray dolly wheels by bolts. The mold spray cone cylinder (39) is composed of a cone cylinder body (77) and a mold spray forming flange (78). The taper of the cone cylinder body (77) is greater than the brushing track of concrete after it comes out of the spray gun (43). The mold spray forming flange (78) is located at the end of the cone cylinder body (77) and is in a line with the profiling wheel (28). Straight lines are all on the sprayed concrete forming surface. A distance meter A (65) and a distance meter B (66) are respectively installed on both sides of the mold spraying cone cylinder (39). A left travel switch C (67) is installed on the left side of the mold spraying trolley system (34) The contour beam (25), a right travel switch D (68) is installed at an appropriate position on the right side of the mold spraying trolley system (34), the front end of the piston rod of the cylinder B (33) is hinged to the mold spraying trolley cross bar (35) on the right side of the mold spraying trolley system (34), and the rear end of the cylinder B (33) is hinged to the right contour beam (25).

5. The simple shotcrete trolley according to claim 1 is characterized in that: The spray gun system (49) is composed of a spray gun (43), a compressed air and quick-setting agent adding pipe (44), a spray gun fixing plate (45), a concrete conveying hose (46), a spray gun brush frame (47), a universal joint (48), a spray gun swing frame (50), a swing motor (51), an eccentric wheel (52) and a spray gun system mounting plate (53). The front end of the spray gun (43) is inserted into the mold spray cone (39), and the spray gun (43) is mounted on the spray gun brush frame (47) through the fixing plate (45). The rear end of the spray gun brush moving frame (47) is connected to the swing frame (50) through a universal joint (48), the front end of the spray gun brush moving frame (47) is connected to the eccentric wheel disc (52), the swing motor (51) is installed at the front part of the swing frame (50), the eccentric wheel disc (52) is installed on the output shaft of the swing motor (51), one end of the spray gun system mounting plate (53) is connected to the spray gun swing frame (50), and the other end is connected to the mold spray trolley cross bar (35) on one side of the mold spray trolley system (34) as a whole.

6. The simple shotcrete trolley according to claim 1 is characterized in that: Cylinder A (22) and cylinder B (33) can be replaced by hydraulic cylinders.

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