CN115749856A - Device for spraying tunnel lining - Google Patents

Abstract

The invention discloses a device for spraying tunnel lining, which adopts a crawler-type moving device as a walking device. Compared with the existing wheeled vehicles, it can adapt to various terrains in the tunnel, and avoids difficulty in moving the vehicle due to the muddy interior of the tunnel. The combination of the oil production cylinder and the horizontal turntable to adjust the horizontal and pitch angles of the injection head assembly can achieve all-round angle injection and greatly improve the coverage of the injection lining of small and medium-sized tunnels. Secondly, the base moves through the rotating device and the crawler The device is connected to realize the large-angle adjustment of the spraying angle. Finally, a cable reel is set on the base, and a certain length of cable is wound from it, so that the power provided by the power facility in the tunnel is effectively used for the spraying device, and the spraying device is improved. injection efficiency.

Description

A device for spraying tunnel lining

technical field

The invention relates to the technical field of wet spraying machines, in particular to a device for spraying tunnel lining.

Background technique

At present, during the construction of tunnel projects in China, wet spraying technology is often used to spray tunnel lining. The principle of this technology uses compressed air or other power to transport a certain proportion of mixing materials through pipelines and spray them at high speed. The sprayed surface is condensed and hardened to form a concrete support layer, but most spray tunnel lining devices include a mobile vehicle and a nozzle fixed on it. By adjusting the direction of the mobile vehicle, the spray angle of the nozzle is controlled, and the mobile vehicle is operated in the tunnel. The flexibility of controlling the injection angle is poor, and there is a dead angle in the injection, which is very inconvenient during injection, and timely construction cannot be achieved, which greatly reduces work efficiency. Moreover, the nozzles of most of the devices are set single, which cannot meet the coverage requirements of sprayed lining for small-section tunnels, which brings great inconvenience to the constructors.

Contents of the invention

Aiming at the problems existing in the prior art, the invention provides a device for spraying tunnel lining, which improves the efficiency of tunnel spraying lining.

The present invention is achieved through the following technical solutions:

A device for spraying tunnel lining, including a spraying device, a spraying head assembly, a boom, a horizontal turntable, a traveling device, a chassis and a rotating device;

The chassis is set on the top of the walking device through a rotating device, which is used to drive the chassis to rotate horizontally and completely; The lower end is connected with the horizontal turntable, the spray head assembly is installed on the upper end of the boom and connected with the spray device, the boom and the horizontal turntable are used to adjust the horizontal and pitch spray angles of the spray head assembly.

Preferably, the boom includes an oil cylinder, a fixed arm and a telescopic arm;

The fixed arm is vertically arranged with its lower end connected to the horizontal turntable, the telescopic arm is arranged at the upper end of the fixed arm, one end of the telescopic arm is hinged with the upper end of the fixed arm, the spray head assembly is connected with the other end of the telescopic arm, and the lower end of the cylinder body of the oil cylinder The hinge is hinged with the lower end of the fixed arm, and the piston rod of the oil cylinder is connected with the middle part of the telescopic arm.

Preferably, the spray head assembly includes three spray heads, the end of the boom is provided with a spray bracket, the fixed end of the spray head is rotatably connected with the spray bracket through a rotating shaft, and the three spray heads are respectively discharged from the spray device through a branch pipeline. The outlet connection of the pipe.

Preferably, the horizontal turntable includes a base, a rotating shaft and a steering arm;

The base is fixed on the chassis, the lower end of the rotating shaft is rotatably arranged in the base, the axis of the steering arm is perpendicular to the axis of the rotating shaft, one end of the steering arm is fixedly connected to the upper end of the rotating shaft, and the lower end of the fixed arm is connected to the other end of the steering arm. One end is fixedly connected, and the steering arm is connected to the driving device through the gear set.

Preferably, the gear set includes an input gear and an output gear;

The input gear is sleeved on the rotating shaft and located on the top of the base, the input gear is sleeved on the steering arm, and the input gear and the output gear mesh with each other, and the input gear and the output gear form a reduction gear set.

Preferably, the input gear and output gear are bevel gear sets.

Preferably, the rotating device includes a fixed column and a rotating gear sleeve;

The lower end of the fixed column is fixed on the top of the fixed base of the walking device. The rotating gear sleeve is set on the fixed column. Fixed on the fixed base of the running gear.

Preferably, the rotating gear sleeve includes a sleeve and a gear fixedly sleeved at the lower end of its outer wall;

The gear meshes with the output shaft of the drive motor, the sleeve is embedded in the center of the base and fixedly connected, and the sleeve is sleeved on the fixed column and can rotate.

Preferably, the base is also provided with a cable reel, on which a cable of a certain length is wound, and the cable is used to provide power for the spraying device.

Preferably, the spraying device is a concrete spraying machine.

Compared with the prior art, the present invention has the following beneficial technical effects:

A device for spraying tunnel lining provided by the present invention includes a walking device on which a base is connected through a rotating device, and an arm frame, an injection device and a horizontal turntable are arranged on the base, and the arm frame can control the injection pitch angle of the injection head assembly. Adjustment, the horizontal rotary table adjusts the spraying horizontal angle of the spraying head assembly, through the coupling of the pitch angle and the horizontal angle, realizes the spraying of the spraying head assembly at all angles, greatly improves the coverage of the spraying lining of small and medium-sized tunnels, and solves the problem of existing devices. The vehicle adjusts the injection angle, and the flexibility of the injection angle is poor. Secondly, the chassis is driven by a rotating device to rotate at a large angle of 360° to achieve rapid adjustment of a large angle, which is convenient for secondary injection of the lining and greatly improves the injection efficiency of concrete slurry.

Further, the oil cylinder and the horizontal turntable are combined to adjust the horizontal and pitch angles of the spray head assembly. The structure is simple and the operation is stable, which greatly improves the service life and operation stability of the device.

Further, a cable reel is set on the base, and a certain length of cable is wound on it. When the device enters the tunnel, the cable is pulled out and connected to the spraying device and the power supply respectively, so that the power facilities in the tunnel can be effectively used. The power provided for the spraying device improves the spraying efficiency of the spraying device.

Furthermore, the crawler-type mobile device is used as the walking device, which can adapt to various terrains in the tunnel compared with the existing wheeled vehicles, and avoids the problem of difficulty in moving the vehicle due to the muddy interior of the tunnel.

Further, the use of multiple spray heads first increases the spray area and improves the spray efficiency, and at the same time the spray heads can rotate independently to facilitate the adjustment of the spray angle.

Description of drawings

Fig. 1 is the structural representation of the device for spraying tunnel lining of the present invention;

Fig. 2 is the front view of the jib of the present invention;

Fig. 3 is a schematic structural view of the spray head assembly of the present invention;

Figure 4 is a schematic diagram of the horizontal rotation of the spray head of the present invention;

Fig. 5 is the detailed view of injection device of the present invention;

Fig. 6 is a top view of the rotating device of the present invention.

In the figure: 1. Cable reel; 2. Injection device; 3. Injection head assembly; 4. Boom; 5. Horizontal turntable; 6. Traveling device; 7. Chassis; 8. Rotating device; 9. Oil cylinder; Fixed arm; 11, telescopic arm; 12, spray head; 13, discharge pipe; 17, fixed column; 18, rotating gear sleeve.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

Referring to FIG. 1 , a device for spraying tunnel lining includes a cable reel 1 , a spraying device 2 , a spraying head assembly 3 , an arm frame 4 , a horizontal turntable 5 , a traveling device 6 , a chassis 7 and a rotating device 8 .

Described chassis 7 is arranged on the top of walking device 6 by rotating device 8, spraying device 2 is installed on the top of chassis 7, and cable reel 1 is installed on one end of spraying device 2, and horizontal turntable 5 is installed on the other end, and the lower end of boom 4 is connected with The horizontal turntable 5 is connected, and the spray head assembly 3 is installed on the upper end of the boom and connected with the spray device 2 .

The cable reel 1 and the horizontal turntable 5 are respectively arranged at the two ends of the base. According to the advancing direction of the traveling device 6, the cable reel 1 is rotated and installed in front of the spraying device 2, and the cable reel is reeled with 100m cable wires. It can be connected with the tunnel power supply box at any time to improve work efficiency. The horizontal turntable 5 is installed at the rear end of the injection device 2, and the lower end of the boom 4 is connected to the horizontal turntable 5. The rotation center of the cable reel 1 is kept at the same level as the injection device 2. on the horizon.

Referring to Fig. 2, boom 4 comprises oil cylinder 9, fixed arm 10 and telescopic arm 11, and fixed arm 10 is arranged vertically and its lower end is connected with horizontal turntable 5, and telescopic arm is horizontally arranged on the upper end of fixed arm, and the end of telescopic arm 11 is connected with The upper end of the fixed arm 10 is hinged, the front end of the telescopic arm 11 extends to the front end of the traveling device 6, the spray head assembly 3 is arranged on the front end of the telescopic arm 11, the lower end of the cylinder body of the oil cylinder 9 is hinged with the lower end of the fixed arm 10 through a hinge, and the oil cylinder The piston rod of 9 is connected with the middle part of telescopic arm 11. The telescopic arm 11 is a two-stage telescopic oil cylinder, and the spray head assembly 3 is installed at the end of the piston rod of the two-stage telescopic oil cylinder. The inclination angle of the arm 11 can realize the adjustment of the concrete spraying angle. The telescopic arm has two stages of expansion and contraction, and the expansion and contraction length needs to meet the requirement of a construction depth of 2m for a small-section tunnel.

The horizontal turntable 5 includes a base 55, a rotating shaft 52 and a steering arm 53, the base 55 is fixed on the bottom of the end of the chassis 7, a ball bearing is embedded in the center of the base 55, and the lower end of the rotating shaft 52 is sleeved on the ball bearing. In the shaft hole, the axis of the steering arm 53 is perpendicular to the axis of the rotating shaft, and one end of the steering arm 53 is fixedly connected with the upper end of the rotating shaft 52, and the other end extends to the front end of the running gear. Fixedly connected, the steering arm is connected to the driving device through the gear set, and the steering arm is horizontally rotated through the driving device.

The gear set includes an input gear 54 and an output gear 51. The input gear 54 is sleeved on the rotating shaft and located on the top of the base. The input gear 54 is sleeved on the steering arm, and the input gear 54 and the output gear 51 are meshed with each other. The driving device is a motor, the motor is fixed on the chassis, not shown in the figure, the output shaft of the motor is provided with a drive gear, the drive gear meshes with the input gear 54, when turning, the motor drives the gear to rotate, and the drive gear drives the input gear 54 Rotate, the input gear 54 drives the output gear 51 to rotate, and then realize the rotation of the steering arm.

In this embodiment, the diameter of the driving gear is smaller than that of the input gear 54 to form a reduction gear set, and a reduction gear set is also formed between the input gear 54 and the output gear 51 to control the steering speed of the fixed arm 10 through two-stage reduction. The input gear 54 and the output gear 51 are bevel gears fitted to each other. In addition, the input gear 54 can also be a face gear.

Referring to Fig. 5, the injection device 2 is a concrete injection machine, which uses compressed air to transport the concrete material mixed according to a certain gradation and water-cement ratio to the injection head assembly through the delivery pipe, and sprays it out at a very high speed, thereby The concrete support layer is formed on the surface of the tunnel. The motor of the concrete injection machine drives the reducer through the coupling. The transmission shaft of the reducer drives the rotor to rotate, and drives the feeder on the hopper to rotate. The concrete mixture enters the hopper Falling into the material cavity of the rotating rotor, after the rotor rotates 180 degrees, the compressed air communicates with the air inlet of the material cavity.

Referring to Figures 1-4, the spray head assembly 3 includes three spray heads 12, the end of the arm frame is provided with a spray bracket, the spray head 12 is installed on the left end of the arm frame through the spray bracket, the three spray heads are distributed in a circle, and two adjacent The angle between the two spray heads is 90°, the three spray heads are respectively connected to the outlet of the discharge pipe through the branch pipeline, and the fixed end of the spray head is connected to the spray bracket through the rotating shaft, which can achieve omni-directional spraying, greatly Improve the coverage of spray lining in small and medium section tunnels.

The walking device 6 is a crawler-type mobile device, and the driving wheels are wound with crawlers, the crawlers are in contact with the ground, and the driving wheels are not in contact with the ground. When the motor drives the drive wheel to rotate, the drive wheel, under the action of the drive torque of the reducer, continuously rolls up the track from the rear through the engagement between the teeth on the drive wheel and the track chain. The part of the track that is grounded gives the ground a backward force, and the ground correspondingly gives the track a forward reaction force, and this reaction is the driving force that pushes the machine forward. When the driving force is sufficient to overcome the walking resistance, the supporting rollers will roll forward on the upper surface of the track, so that the machine can move forward. Used in tunnels.

Referring to Fig. 6, rotating device 8 comprises fixed column 17 and rotating gear cover 18, and the top of walking device is formed with fixed base, and the lower end of fixed column 17 is fixed on the fixed base center of walking device, and rotating gear cover 18 is sleeved on fixed base. On the column 17, the rotating gear sleeve 18 includes a sleeve and a gear fixedly sleeved on the lower end of its outer wall. The sleeve is embedded in the center of the base and is fixedly connected. At the same time, the base is located on the top of the fixed base. Engaging, the driving motor is fixed on the fixed base of the walking device, and the driving motor drives the base to rotate through the rotating gear sleeve, which can make the upper spraying device form a 360° large-angle rotation, and realize spraying without dead angle coverage.

In this embodiment, the oil cylinder 9, the telescopic arm 11, the spraying device 2 and the traveling device are connected with the controller, and the work of each component is controlled by the controller, and the controller is connected with the terminal. The working condition of the lining device.

The method of using the device for jetting tunnel lining provided by the present invention will be described in detail below.

When in use, pour concrete into the spraying device 2, and the spraying device 2 sends the concrete to the spraying head assembly 3 through the delivery pipe under the action of pressure, and the spraying head assembly 3 sprays the concrete to the lining surface, and forms a support after solidification During the spraying process, the horizontal spraying angle is adjusted through the horizontal turntable 5, which can drive the boom to rotate horizontally, and the horizontal rotation angle is -45°～180°. Through the coupling of the horizontal angle and the pitch angle, the spraying range can be effectively controlled to realize the spraying of the tunnel lining. During the spraying process, the spraying angle can be controlled through the control terminal to realize accurate positioning of the spraying direction; when the spraying angle and depth need to be adjusted , the pitch of the telescopic arm is controlled by the oil cylinder. The telescopic arm has two stages of telescopic expansion, and the telescopic length can meet the requirement of 2m for the construction depth of small-section tunnels; Require. When it is necessary to carry out secondary spraying or to add concrete to the missed area, the entire base can be rotated 180° horizontally through the rotating device, and then the secondary spraying can greatly improve the spraying efficiency and meet the coverage requirements of the sprayed lining of the tunnel.

The invention provides a device for spraying tunnel lining, which adopts a crawler-type mobile device as a walking device. Compared with the existing wheeled vehicles, it can adapt to various terrains in the tunnel and avoid the difficulty in moving the vehicle due to the muddy inside the tunnel. In order to solve the problem, the oil cylinder and the horizontal turntable are combined to adjust the horizontal and pitch angles of the injection head assembly, which can achieve all-round angle injection and greatly improve the coverage of the injection lining of small and medium-sized tunnels. Secondly, the base moves through the rotating device and the crawler The device is connected to realize the large-angle adjustment of the spraying angle. Finally, a cable reel is set on the base, and a certain length of cable is wound from it, so that the power provided by the power facility in the tunnel is effectively used for the spraying device, and the spraying device is improved. injection efficiency.

The above content is only to illustrate the technical ideas of the present invention, and cannot limit the protection scope of the present invention. Any changes made on the basis of the technical solutions according to the technical ideas proposed in the present invention shall fall within the scope of the claims of the present invention. within the scope of protection.

Claims (10)

1. A device for spraying tunnel lining, characterized in that it comprises spraying device (2), spray head assembly (3), boom (4), horizontal turntable (5), running gear (6), chassis ( 7) and rotating device (8); The chassis (7) is arranged on the top of the running device (6) through a rotating device (8), and the rotating device (8) is used to drive the chassis to rotate horizontally; the injection device (2) is installed on the bottom of the chassis (7). On the top, the horizontal turntable (5) is installed on the chassis and is located at one end of the injection device (2), the lower end of the boom (4) is connected with the horizontal turntable (5), and the spray head assembly (3) is installed on the upper end of the boom and connected with the The injection device (2) is connected, and the boom (4) and the horizontal turntable (5) are used to adjust the horizontal and pitch injection angles of the injection head assembly (3). 2. A device for spraying tunnel lining according to claim 1, characterized in that the boom (4) includes an oil cylinder (9), a fixed arm (10) and a telescopic arm (11); Described fixed arm (10) vertically arranges its lower end to be connected with horizontal turntable (5), telescopic arm is arranged on the upper end of fixed arm, and one end of telescopic arm (11) is hinged with the upper end of fixed arm (10), spray head assembly ( 3) Connected to the other end of the telescopic arm (11), the lower end of the cylinder body of the oil cylinder (9) is hinged to the lower end of the fixed arm (10) through a hinge, and the piston rod of the oil cylinder (9) is connected to the middle of the telescopic arm (11) . 3. A kind of device for spraying tunnel lining according to claim 1, is characterized in that, described spraying head assembly (3) comprises three spraying heads (12), and the end of boom is provided with spraying support, The fixed end of the spray head is rotatably connected with the spray bracket through the rotating shaft, and the three spray heads are respectively connected with the outlet of the discharge pipe of the spray device through branch pipelines. 4. A device for spraying tunnel lining according to claim 1, characterized in that the horizontal turntable (5) comprises a base (55), a rotating shaft (52) and a steering arm (53); Described pedestal (55) is fixed on the chassis (7), and the lower end of rotating shaft (52) is rotatably arranged in pedestal (55), and the axis of steering arm (53) is vertically arranged with the axis of rotating shaft, and steering arm (53) One end of one end is fixedly connected with the upper end of rotating shaft (52), and the lower end of fixed arm (10) is fixedly connected with the other end of steering arm (53), and steering arm is by gear set and driving device. 5. A device for spraying tunnel lining according to claim 4, characterized in that, the gear set comprises an input gear (54) and an output gear (51); The input gear (54) is sleeved on the rotating shaft and positioned at the top of the base, the input gear (54) is sleeved on the steering arm, and the input gear (54) and the output gear (51) are meshed with each other, and the input gear ( 54) and the output gear (51) form a reduction gear set. 6. The device for jet tunnel lining according to claim 5, characterized in that, the input gear (54) and output gear (51) are bevel gear sets. 7. A device for spraying tunnel lining according to claim 1, characterized in that the rotating device (8) comprises a fixed column (17) and a rotating gear sleeve (18); The lower end of the fixed column (17) is fixed on the top of the fixed base of the walking device, the rotating gear sleeve (18) is sleeved on the fixed column (17), and the base and the rotating gear sleeve (18) are affixed and positioned on the fixed base On the top, the rotating gear sleeve (18) is engaged with the driving motor, and the driving motor is fixed on the fixed base of the running gear. 8. A device for spraying tunnel lining according to claim 7, characterized in that, the rotating gear sleeve (18) comprises a sleeve and a gear fixedly sleeved on the lower end of its outer wall; The gear is meshed with the output shaft of the drive motor, the sleeve is embedded in the center of the base and fixedly connected, and the sleeve is sleeved on the fixed column (17) and can rotate. 9. A device for spraying tunnel lining according to claim 1, characterized in that, the base is also provided with a cable reel (1), on which a cable of a certain length is wound, and the cable Used to power jetting devices. 10. A device for spraying tunnel lining according to claim 1, characterized in that the spraying device (2) is a concrete spraying machine.

Images