Split type concrete wet spraying trolley for tunnel

Abstract

The application provides a split type concrete wet spraying trolley for a tunnel, and belongs to the technical field of concrete wet spraying trolleys. The structure comprises an arm support operation trolley, and the movable hook at the rear end of the arm support operation trolley is provided with a concrete pump trolley. The first traction mechanism is provided with two functions of side buffer sliding traction and center traction, and the second traction mechanism is provided with multiple functions of side buffer sliding traction, center traction, extension and retraction of the length of the traction arm, and large-angle swinging of the retraction traction arm. The self-adaptive traction movement of the first traction mechanism and the second traction mechanism can make the arm support operation trolley and the concrete pump trolley occupy smaller space in the process of turning, turning, moving and position adjustment in the narrow construction space of the tunnel, avoid the serious limitation of the passing and operation space of the equipment, and greatly improve the construction efficiency.

Description

Technical Field

[0001] This invention relates to a split-type concrete wet spraying trolley for tunnels, belonging to the technical field of concrete wet spraying trolleys. Background Technology

[0002] Currently, the concrete wet spraying trolleys used in tunnel construction generally adopt an integrated structural design of concrete pumping unit and trolley operation unit. This type of integrated equipment is large in size and heavy in weight, and its flexibility in turning, moving, and repositioning in the narrow construction space of tunnels is extremely poor. Especially in complex working conditions such as tunnel diameter change sections and construction intersections, the equipment's passage and operating space are severely restricted, significantly reducing construction efficiency. At the same time, the transportation and relocation of integrated equipment requires large transport vehicles, resulting in high transfer costs, and the operation procedures for the overall entry and exit of the equipment are cumbersome.

[0003] Secondly, in an integrated structure, the vibrations generated by the concrete pumping unit during operation are directly transmitted to the trolley working unit, easily causing the trolley to shift its position. This not only affects the stability of construction operations but also increases the wear and tear on equipment components, reducing the overall service life of the equipment. Currently, there is no wet spraying equipment designed specifically for tunnel construction that separates the pumping and trolley units, failing to meet the core requirements of tunnel construction for equipment flexibility and spatial adaptability. To address these needs, this invention proposes a separate wet concrete spraying trolley for tunnels. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a split-type concrete wet spraying trolley for tunnels to solve the existing problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a split-type concrete wet spraying trolley for tunnels, the structure of which includes a boom work vehicle, and a concrete pump truck is attached to the movable hook at the rear end of the boom work vehicle. The boom work vehicle includes a boom body, and a driver's cab, a first control electrical box, multiple sets of quick-setting agent tanks and a main boom support seat are respectively installed on the top surface of the boom body. A universal swing boom mechanism is provided at the left end of the top surface of the boom body. Two hydraulic outriggers are provided at both ends of the left side of the boom body. A traction longitudinal movement groove is longitudinally opened at the lower end of the right side of the boom body, and a first traction mechanism is provided in the traction longitudinal movement groove. The concrete pump truck includes a pumping frame, with a hopper at the rear end of the pumping frame and a concrete pump body extending outward from the hopper. A pumping motor is driven to the concrete pump body. A second control box, a water tank, and an accelerator supply body are also installed on the top surface of the pumping frame. The accelerator supply body is connected to multiple sets of accelerator tanks and the hopper through multiple hoses. A second traction mechanism is installed at the bottom front end of the pumping frame and is traction-dependent by a movable hook of the first traction mechanism. Two support legs are provided on the left and right sides of the pumping frame. A lifting support caster body is vertically installed in the middle of the bottom surface of the pumping frame. The first traction mechanism includes a longitudinal seat, and a sliding traction head assembly is fitted inside the cavity of the longitudinal seat, and a positioning mechanism for centering and fixing the sliding traction head assembly is covered on the top surface of the longitudinal seat. The second traction mechanism includes a traction top seat, and a sliding buffer trolley is movably mounted on the front end of the traction top seat. A telescopic traction arm that hooks and pulls with the sliding traction head assembly is provided in the middle of the sliding buffer trolley. A first auxiliary locking mechanism and a second auxiliary locking mechanism are respectively provided on the front and rear sides of the sliding buffer trolley for locking and centering the sliding buffer trolley. Two anti-collision posts are provided on the left and right sides of the rear end of the traction top seat for anti-collision locking when the telescopic traction arm swings left and right.

[0006] A further improvement is that the front bottom surface of the pumping vehicle frame is provided with a traction swing groove for the traction top seat assembly, and the rear side of the traction swing groove is provided with an anti-jamming arc surface.

[0007] A further improvement is that a first transverse groove is provided in the middle of the top surface of the longitudinal seat, and a sliding port for the drag seat is provided on the front wall of the first transverse groove.

[0008] A further improvement is that the universal arm mechanism includes a boom slewing bearing, on which a telescopic boom body and a boom telescopic cylinder are hinged. A small boom slewing bearing is provided at the tail of the telescopic boom body, and a telescopic small boom body is installed on the small boom slewing bearing. A rotator body is installed at the tail of the telescopic small boom body, and a nozzle connected to the concrete pump body via a feed hose is installed on the rotator body.

[0009] A further improvement is that the sliding traction head assembly includes a sliding beam, on which a drag block is fitted. The lower front end of the drag block is provided with multiple abutment wheels for rolling support against the front wall of the first transverse sliding groove. The drag block has a drag seat body that passes through the drag seat sliding passage in the middle of its front end. The left and right beams of the sliding beam are fitted with buffer sliders and springs. The top surface of the drag block has two positioning pull blocks on the left and right sides.

[0010] A further improvement is that the positioning mechanism includes a panel, and a third auxiliary locking mechanism and a fourth auxiliary locking mechanism are respectively provided on the front and rear sides of the bottom of the panel to pull the positioning block towards the middle. The third auxiliary locking mechanism includes a cylinder seat, on which a hydraulic cylinder is mounted, and a pull head is connected to the left end of the hydraulic cylinder. A support slide rod passing through the cylinder seat is arranged laterally on the right side of the pull head. The first auxiliary locking mechanism, the second auxiliary locking mechanism, the third auxiliary locking mechanism and the fourth auxiliary locking mechanism have the same structure.

[0011] A further improvement is that a second transverse sliding groove is provided on the front side of the traction top seat, and two trapezoidal slides are provided on the front and rear walls of the second transverse sliding groove, and two buffer abutments are vertically arranged on the left and right sides of the bottom of the second transverse sliding groove.

[0012] A further improvement is that the sliding buffer trolley includes a trolley body, and multiple trapezoidal movement wheels are spaced apart on the front and rear sides of the trolley body for moving within the trapezoidal slide. A rotating shaft seat groove is provided in the middle of the bottom surface of the trolley body, and multiple supporting movement wheels are provided in the middle of the top surface of the trolley body for rolling against the bottom of the second transverse movement groove. Two buffer telescopic grooves are provided on the left and right sides of the trolley body, and buffer plate bodies are fitted outward from the two buffer telescopic grooves. Rubber buffer pads are provided on the outer side of the buffer plate bodies.

[0013] A further improvement is that the telescopic traction arm includes a rotating shaft seat body, on which the traction telescopic arm body is fixedly mounted, and a fixed seat is provided at the front end of the traction telescopic arm body. A swing arm and a traction sleeve are hinged on the fixed seat, and the traction sleeve is hooked to the towing body and then fixedly connected by bolts.

[0014] A further improvement is that each of the aforementioned anti-collision posts is fitted with an elastic sleeve, which is made of rubber.

[0015] A further improvement is that the boom lift provides power to the concrete pump truck during use.

[0016] A further improvement is that the driver's cab, the first control electrical box, the omnidirectional boom mechanism, the hydraulic outriggers, the first traction mechanism, and the boom truck body are electrically connected.

[0017] A further improvement is that the concrete pump body, pumping motor, second traction mechanism, lifting support caster body, quick-setting agent supply body, and second control box are electrically connected.

[0018] Further improvements are made to the fact that the main body of the boom truck, the first control electrical box, the pump truck frame, the main body of the concrete pump, the second control electrical box, the main body of the quick-setting agent supply, the main body of the lifting support caster, the main body of the telescopic boom, the main body of the telescopic arm, the main body of the rotator, the main body of the buffer plate, the main body of the rotating shaft seat, and the main body of the traction telescopic boom are all existing technologies, and their structures will not be described in detail here.

[0019] The beneficial effects of the invention are: This invention provides a split-type concrete wet spraying trolley for tunnels. Through the structural combination design of a boom truck and a concrete pump truck, a split-type concrete wet spraying trolley for tunnels is formed. The boom truck and the concrete pump truck are set up separately and independently, which shortens the length of the concrete pump truck from the original 8700mm to the current 5886mm, a reduction of 2814mm. This greatly improves the flexibility of the boom truck in tunnel operation and reduces the difficulty of operation.

[0020] The improved boom lift, with its smaller body space and multiple accelerator tanks, increases the internal accelerator storage capacity from 1500L to 3500L. It also balances the forward shift of the trolley's center of gravity caused by the removal of the original pumping unit from the concrete pump truck, thus improving the stability of the original swivel boom mechanism. This effectively improves the quality of shotcreting, avoids the need for interruptions in construction due to insufficient accelerator, reduces downtime, increases work efficiency, shortens the construction cycle, and lowers construction costs.

[0021] Since the pumping unit, consisting of the concrete pump body and the pumping motor, is located on the concrete pump truck, the high-frequency vibrations generated during pumping will not be transmitted to the boom truck. This effectively reduces the vibration impact of the pumping unit on the swivel boom mechanism and improves the equipment's spatial adaptability and operational stability.

[0022] The first traction mechanism has two functions: side-buffered sliding traction and center-of-care traction. The second traction mechanism has multiple functions, including side-buffered sliding traction, center-of-care traction, extension of the telescopic traction boom, and large-angle swing of the telescopic traction boom. The adaptive traction movement of the first and second traction mechanisms allows the boom-operated vehicle to tow the concrete pump truck in the narrow construction space of the tunnel, requiring less space for turning, turning, moving, and repositioning. This avoids severe restrictions on the passage and working space of the equipment, greatly improves construction efficiency, and effectively solves the problems of existing integrated equipment requiring large transport vehicles for transportation and relocation, resulting in high transfer costs and cumbersome operation procedures for the overall entry and exit of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a split-type concrete wet spraying trolley for tunnels according to the present invention; Figure 2 This is a schematic diagram of the universal arm mechanism of the present invention; Figure 3 This is a schematic diagram of the concrete pump truck structure of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the concrete pump truck of the present invention; Figure 5 This is a schematic diagram of the unfolded structure of the first traction mechanism of the present invention; Figure 6 This is a schematic diagram of the sliding traction head assembly structure of the present invention; Figure 7 This is a schematic diagram of the second traction mechanism of the present invention; Figure 8 This is a schematic diagram of the sliding buffer trolley structure of the present invention; Figure 9 This is a schematic diagram of the telescopic traction arm structure of the present invention; Figure 10 This is a right view of the traction top seat of the present invention. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] Please see Figures 1-10This invention provides a schematic diagram of a split-type concrete wet spraying trolley for tunnels: its structure includes a boom truck 1, and a concrete pump truck 2 is attached to the rear end of the boom truck 1 via a movable hook. The boom truck 1 includes a boom truck body 11, and a driver's cab 12, a first control electrical box 13, multiple sets of quick-setting agent tanks 14, and a main boom support seat 17 are respectively installed on the top surface of the boom truck body 11. A universal swing boom mechanism 15 is provided at the left end of the top surface of the boom truck body 11. Two hydraulic outriggers 16 are provided at both ends of the left side of the boom truck body 11. The right side of the boom truck body 11 is lower... The concrete pump truck 2 has a longitudinal traction groove 18, and a first traction mechanism 19 is installed in the traction groove 18. The concrete pump truck 2 includes a pumping frame 21, and a hopper 22 is provided at the rear end of the pumping frame 21. A concrete pump body 23 is extended and connected to the hopper 22. A pumping motor 24 is drivenly connected to the concrete pump body 23. A second control box 25, a water tank 26, and a quick-setting agent supply body 210 are also installed on the top surface of the pumping frame 21. The quick-setting agent supply body 210 is connected to multiple sets of quick-setting agent tanks 14 and the hopper 22 through multiple hoses. The pumping vehicle frame 21 has a second traction mechanism 27 installed at the bottom front end, which is movably hooked to the first traction mechanism 19. Two support legs 28 are provided on the left and right sides of the pumping vehicle frame 21. A lifting support universal wheel body 29 is vertically arranged in the center of the bottom surface of the pumping vehicle frame 21. The first traction mechanism 19 includes a longitudinal seat 191, and a sliding traction head assembly 192 is fitted inside the cavity of the longitudinal seat 191. A positioning mechanism 193 is fitted on the top surface of the longitudinal seat 191 to center and fix the sliding traction head assembly 192. The second traction mechanism 27 includes a traction top... The traction top seat 271 has a sliding buffer trolley 272 movably mounted at its front end. The sliding buffer trolley 272 has a telescopic traction arm 273 in the middle for hooking and traction with the sliding traction head assembly 192. The sliding buffer trolley 272 has a first auxiliary locking mechanism 274 and a second auxiliary locking mechanism 275 on its front and rear sides for locking and centering the sliding buffer trolley 272. The traction top seat 271 has two anti-collision posts 276 on its rear left and right sides for anti-collision locking when the telescopic traction arm 273 swings left and right.

[0026] The front bottom surface of the pumping vehicle frame 21 is provided with a traction swing groove 211 for traction top seat 271 assembly, and the rear side of the traction swing groove 21 is provided with an anti-jamming arc surface 212.

[0027] The top surface of the longitudinal seat 191 is provided with a first transverse sliding groove 1911, and the front end wall of the first transverse sliding groove 1911 is provided with a sliding seat passage 1912.

[0028] The universal boom mechanism 15 includes a boom slewing bearing 151, on which a telescopic boom body 152 and a boom telescopic cylinder 153 are hinged. A small boom slewing bearing 154 is provided at the tail of the telescopic boom body 152. A telescopic small boom body 155 is installed on the small boom slewing bearing 154. A rotator body 156 is installed at the tail of the telescopic small boom body 155. A nozzle 157 connected to the concrete pump body 23 through a feed hose is installed on the rotator body 156.

[0029] The sliding traction head assembly 192 includes a sliding beam 1921, on which a drag block 1922 is fitted. The lower front end of the drag block 1922 is provided with multiple abutment wheels 1923 for rolling support against the front groove wall of the first transverse groove 1911. The middle front end of the drag block 1922 is provided with a drag seat body 1924 that passes through the drag seat sliding passage 1912. The left and right beams of the sliding beam 1921 are fitted with buffer sliders 1925 and springs 1926. The top surface of the drag block 1922 is provided with two positioning pull blocks 1927 on the left and right sides.

[0030] The positioning mechanism 193 includes a panel 1931, and the front and rear sides of the bottom of the panel 1931 are respectively provided with a third auxiliary locking mechanism 1932 and a fourth auxiliary locking mechanism 1933 for pulling the positioning pull block 1927 towards the middle. The third auxiliary locking mechanism 1932 includes a cylinder seat 19321, and a hydraulic cylinder 19322 is mounted on the cylinder seat 19321. The left end of the hydraulic cylinder 19322 is connected to a pull head 19323. A support slide rod 19324 passing through the cylinder seat 19321 is arranged laterally on the right side of the pull head 19323. The first auxiliary locking mechanism 274, the second auxiliary locking mechanism 275, the third auxiliary locking mechanism 1932, and the fourth auxiliary locking mechanism 1933 have the same structure.

[0031] The front side of the traction top seat 271 is provided with a second transverse sliding groove 2711, and two trapezoidal slides 2712 are provided on the front and rear walls of the second transverse sliding groove 2711. Two buffer abutments 2713 are vertically arranged on the left and right sides of the bottom of the second transverse sliding groove 2711.

[0032] The sliding buffer trolley 272 includes a trolley body 2721, and multiple trapezoidal movement wheels 2722 are spaced apart on the front and rear sides of the trolley body 2721 for movement within the trapezoidal slide rail 2712. A rotating shaft seat groove 2723 is provided in the middle of the bottom surface of the trolley body 2721. Multiple support movement wheels 2724 are provided in the middle of the top surface of the trolley body 2721 for rolling against the bottom of the second transverse groove 271. Two buffer telescopic grooves 2725 are provided on the left and right sides of the trolley body 2721. A buffer plate body 2726 is fitted outwardly on the two buffer telescopic grooves 2725, and a rubber buffer pad 2727 is provided on the outer side of the buffer plate body 2726.

[0033] The telescopic traction arm 273 includes a rotating shaft seat body 2731, on which a traction telescopic arm body 2732 is fixedly mounted. A fixed seat 2733 is provided at the front end of the traction telescopic arm body 2732. A swing arm 2734 and a traction sleeve 2735 are hinged on the fixed seat 2733. The traction sleeve 2735 is hooked to the towing body 1924 and then fixedly connected by bolts.

[0034] Each of the anti-collision posts 276 is fitted with an elastic sleeve 2761, which is made of rubber.

[0035] Working principle: Firstly, the wet spraying operation between the boom truck 1 and the concrete pump truck 2 is existing technology, which will not be elaborated on here.

[0036] When the boom lift 1 tows the concrete pump truck 2 to make a U-turn in a narrow tunnel, the first control box 13 is operated to simultaneously extend the third auxiliary locking mechanism 1932 and the fourth auxiliary locking mechanism 1933, thus canceling the centering lock fixing of the towing block 1922, allowing the towing block 1922 to slide on the sliding beam 1921 in the direction of the traction force when subjected to traction force. Then, the second control box 25 is operated to simultaneously extend the first auxiliary locking mechanism 274 and the second auxiliary locking mechanism 275, thus canceling the centering lock fixing of the towing block 1922, allowing the towing block 1922 to slide on the sliding beam 1921 in the direction of the traction force. The centering lock of the sliding buffer trolley 272 is removed, allowing the sliding buffer trolley 272 to slide in the direction of traction on the two trapezoidal slides 2712. The front end of the pump truck frame 21 is raised by lowering the lifting support universal wheel body 29, raising the two outriggers 28 off the ground. Finally, the traction telescopic boom body 2732 is extended to increase the index distance between the boom work vehicle 1 and the concrete pump truck 2, preventing the rear of the boom work vehicle 1 from colliding with the front of the concrete pump truck 2 when the boom work vehicle 1 makes a large-angle turn.

[0037] When the boom lift 1 makes a sharp U-turn, it pulls the tow block 1922 onto the slide beam 1921. When the tow block 1922 slides to the side, it forms a buffer against the buffer slider 1925 under the action of the spring 1926, preventing a hard impact. Simultaneously, the sliding of the tow block 1922 to the side, through the traction of the telescopic boom body 2732, will also cause the sliding buffer trolley 272 to slide in the direction of force. Under the action of the rotating shaft seat body 2731, the telescopic boom body 2732 will swing in the same direction. When the sliding buffer trolley 272 slides to its maximum extent to the side, the buffer plate body 2726 on the same side will... The boom is buffered against the buffer post 2713, preventing hard collisions. After the boom body 2732 swings to its maximum extent, the boom body 2732 flexibly abuts against the anti-collision post 276 on the same side, preventing the boom body 2732 from swinging at a large angle and hitting the side of the pump truck frame 21. When the concrete pump truck 2 is towed, the casters on the lifting support caster body 29 can make the concrete pump truck 2 turn around in a small space. The first traction mechanism 19 and the second traction mechanism 27 can enable the boom work vehicle 1 to drive the concrete pump truck 2 to make a small-range, large-angle swing and turn in a narrow tunnel.

[0038] In addition, when the boom lift vehicle 1 tows the concrete pump truck 2 forward, the third auxiliary locking mechanism 1932 and the fourth auxiliary locking mechanism 1933 need to be operated to retract synchronously, and the towing block 1922 needs to be pulled to fix it in the center. The first auxiliary locking mechanism 274 and the second auxiliary locking mechanism 275 need to be operated to retract synchronously, and the sliding buffer trolley 272 needs to be pulled to fix it in the center. This ensures that the traction force of the boom lift vehicle 1 on the concrete pump truck 2 is centered, and avoids the risk of the concrete pump truck 2 overturning due to the single-sided force during high-speed towing.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A split-type concrete wet spraying trolley for tunnels, characterized in that: Its structure includes a boom lift vehicle, and a concrete pump truck is attached to the rear hook of the boom lift vehicle. The boom lift vehicle includes a boom lift body, and the top surface of the boom lift body is equipped with a driver's cab, a first control electrical box, multiple sets of quick-setting agent tanks and a main boom support seat. A universal swing boom mechanism is provided at the left end of the top surface of the boom lift body. Two hydraulic outriggers are provided at both ends of the left side of the boom lift body. A traction longitudinal transfer groove is longitudinally opened at the lower right side of the boom lift body, and a first traction mechanism is provided in the traction longitudinal transfer groove. The concrete pump truck includes a pumping frame, with a hopper at the rear end of the pumping frame and a concrete pump body extending outward from the hopper. A pumping motor is driven to the concrete pump body. A second control box, a water tank, and an accelerator supply body are also installed on the top surface of the pumping frame. The accelerator supply body is connected to multiple sets of accelerator tanks and the hopper through multiple hoses. A second traction mechanism is installed at the bottom front end of the pumping frame and is traction-dependent by a movable hook of the first traction mechanism. Two support legs are provided on the left and right sides of the pumping frame. A lifting support caster body is vertically installed in the middle of the bottom surface of the pumping frame. The first traction mechanism includes a longitudinal seat, and a sliding traction head assembly is fitted inside the cavity of the longitudinal seat, and a positioning mechanism for centering and fixing the sliding traction head assembly is covered on the top surface of the longitudinal seat. The second traction mechanism includes a traction top seat, and a sliding buffer trolley is movably mounted on the front end of the traction top seat. A telescopic traction arm that hooks and pulls with the sliding traction head assembly is provided in the middle of the sliding buffer trolley. A first auxiliary locking mechanism and a second auxiliary locking mechanism are respectively provided on the front and rear sides of the sliding buffer trolley for locking and centering the sliding buffer trolley. Two anti-collision posts are provided on the left and right sides of the rear end of the traction top seat for anti-collision locking when the telescopic traction arm swings left and right.

2. The split-type concrete wet spraying trolley for tunnels according to claim 1, characterized in that: The front bottom surface of the pump truck frame is provided with a traction swing groove for the traction top seat assembly, and the rear side of the traction swing groove is provided with an anti-jamming arc surface.

3. A split-type concrete wet spraying trolley for tunnels according to claim 2, characterized in that: The top surface of the longitudinal seat is provided with a first transverse groove in the middle, and the front wall of the first transverse groove is provided with a sliding port for the drag seat.

4. A split-type concrete wet spraying trolley for tunnels according to claim 3, characterized in that: The universal boom mechanism includes a boom slewing bearing, on which a telescopic boom body and a boom telescopic cylinder are hinged. A small boom slewing bearing is provided at the tail of the telescopic boom body. A telescopic small boom body is installed on the small boom slewing bearing. A rotator body is installed at the tail of the telescopic small boom body. A nozzle connected to the concrete pump body via a feed hose is installed on the rotator body.

5. A split-type concrete wet spraying trolley for tunnels according to claim 4, characterized in that: The sliding traction head assembly includes a sliding beam, on which a drag block is fitted. The lower front end of the drag block is provided with multiple abutment wheels for rolling support against the front wall of the first transverse sliding groove. The drag block has a drag seat body that passes through the drag seat sliding passage in the middle of its front end. The left and right beams of the sliding beam are fitted with buffer sliders and springs. The top surface of the drag block has two positioning pull blocks on the left and right sides.

6. A split-type concrete wet spraying trolley for tunnels according to claim 5, characterized in that: The positioning mechanism includes a panel, and a third auxiliary locking mechanism and a fourth auxiliary locking mechanism are respectively provided on the front and rear sides of the bottom of the panel to pull the positioning block towards the middle. The third auxiliary locking mechanism includes a cylinder seat, on which a hydraulic cylinder is mounted, and a pull head is connected to the left end of the hydraulic cylinder. A support slide rod passing through the cylinder seat is arranged laterally on the right side of the pull head. The first auxiliary locking mechanism, the second auxiliary locking mechanism, the third auxiliary locking mechanism and the fourth auxiliary locking mechanism have the same structure.

7. A split-type concrete wet spraying trolley for tunnels according to claim 6, characterized in that: The front side of the traction top seat is provided with a second transverse sliding groove, and two trapezoidal slides are provided on the front and rear walls of the second transverse sliding groove. Two buffer abutments are provided vertically on the left and right sides of the bottom of the second transverse sliding groove.

8. A split-type concrete wet spraying trolley for tunnels according to claim 7, characterized in that: The sliding buffer trolley includes a trolley body, and multiple trapezoidal movement wheels are spaced apart on the front and rear sides of the trolley body for moving within the trapezoidal slide. A rotating shaft seat groove is provided in the middle of the bottom surface of the trolley body, and multiple support movement wheels are provided in the middle of the top surface of the trolley body for rolling against the bottom of the second transverse movement groove. Two buffer telescopic grooves are provided on the left and right sides of the trolley body, and buffer plate bodies are fitted outward from the two buffer telescopic grooves. Rubber buffer pads are provided on the outer side of the buffer plate bodies.

9. A split-type concrete wet spraying trolley for tunnels according to claim 8, characterized in that: The telescopic traction arm includes a rotating shaft seat body, on which the traction telescopic arm body is fixedly mounted. A fixed seat is provided at the front end of the traction telescopic arm body. A swing arm and a traction sleeve are hinged on the fixed seat. The traction sleeve is hooked to the towing body and then fixedly connected by bolts.

10. A split-type concrete wet spraying trolley for tunnels according to claim 9, characterized in that: Each of the aforementioned anti-collision posts is fitted with an elastic sleeve, which is made of rubber.

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