Concrete injection device for tunnel construction

Abstract

The application relates to a concrete spraying device for tunnel construction, which comprises a vehicle body, a swing mechanism, a concrete supply mechanism and a scraping mechanism arranged in sequence on the vehicle body, a discharging pipe of the concrete supply mechanism being connected with the swing mechanism, the scraping mechanism comprising a top scraper assembly, side scraper assemblies being arranged on the two sides of the top scraper assembly, the top scraper assembly being connected with a vertical plate fixed on the vehicle body in a vertical sliding mode, the side scraper assemblies being connected with the vertical plate in a horizontal sliding mode, the vertical scraper assembly and the horizontal scraper assembly being provided with push rods inserted into arc-shaped grooves of a rotating disc so that the vertical scraper assembly and the horizontal scraper assembly can be driven to move synchronously through the arc-shaped grooves and the push rods when the rotating disc rotates, and the device has high efficiency and good concrete spraying quality.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment technology, and specifically to a concrete spraying device for tunnel construction. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Since its application in underground development projects in the 1950s, shotcrete technology has been widely adopted by many countries in underground and surface concrete projects in industries such as construction, municipal engineering, railways, and mining due to its advantages such as high degree of mechanization, simple process, and high production efficiency.

[0004] Most existing concrete spraying devices for tunnels suffer from uneven concrete spraying and cannot smooth the sprayed concrete on the walls during the spraying process, easily leading to concrete lumps. This is not only unsightly but also prone to falling off, causing unnecessary damage. Currently, manual smoothing is used after concrete spraying, which is labor-intensive, prolongs the construction period, and the quality of manual smoothing is poor, with uneven concrete still present after construction.

[0005] Patent application number 201510181547.0 discloses an integrated concrete spraying and coating tunnel construction device. After concrete spraying, it can scrape the concrete to smooth it out, solving the problem of uneven concrete spraying and easy clumping. However, the inventors found that as tunnel construction progresses, the technical solution requires continuous disassembly and reinstallation of the track and related equipment. The disassembly and reassembly process of the device wastes a lot of time, prolongs the construction time, and increases the labor intensity of construction workers. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a concrete spraying device for tunnel construction, which has high working efficiency and shortens the construction cycle.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] An embodiment of the present invention provides a concrete spraying device for tunnel construction, including a vehicle body. The vehicle body is sequentially provided with a swing mechanism, a concrete supply mechanism, and a leveling mechanism. The discharge pipe of the concrete supply mechanism is connected to the swing mechanism. The leveling mechanism includes a top scraper assembly, and side scraper assemblies are provided on both sides of the top scraper assembly. The top scraper assembly is slidably connected to a vertical plate fixed to the vehicle body in a vertical direction. The side scraper assemblies are slidably connected to the vertical plate in a horizontal direction. Both the vertical scraper assembly and the horizontal scraper assembly are provided with push rods that extend into the arc-shaped groove of the rotating disk so that when the rotating disk rotates, the vertical scraper assembly and the horizontal scraper assembly can move synchronously through the arc-shaped groove and the push rods.

[0009] Optionally, the rocking mechanism includes a first rocker arm, the bottom end of which is rotatably connected to a fixed seat on the vehicle body, a support plate at the top of the first rocker arm, the support plate being fixed to the discharge pipe, a first slider slidably connected to the first rocker arm, the first slider being rotatably connected to one end of a first connecting rod, and the other end of the first connecting rod being connected to a rocking drive component.

[0010] Optionally, the rocking mechanism further includes a second rocker arm, the bottom end of which is rotatably connected to a fixed base, a second slider slidably connected to the second rocker arm, the second slider being fixed to the bottom end of a telescopic rod, the top end of the telescopic rod being fixed to a support plate, and a spring being provided on the outer periphery of the telescopic rod.

[0011] Optionally, the concrete supply mechanism includes a storage tank with an open top, a lid on top of the storage tank, a mixing mechanism installed on the lid, and a mortar pump. The inlet of the mortar pump is connected to the storage tank through a feed pipe, the outlet of the mortar pump is connected to one end of a discharge pipe, and the other end of the discharge pipe is connected to a swinging mechanism.

[0012] Optionally, the bucket lid is connected to a lifting mechanism mounted on the vehicle body.

[0013] Optionally, the stirring mechanism includes a stirring drive fixed to the lid of the container, the stirring drive being connected to a stirring shaft that can extend into the storage container, and the stirring shaft having multiple stirring blades fixed to it.

[0014] Optionally, the top scraper assembly includes a top plate, which is an arc-shaped plate that matches the tunnel arch. The top plate is fixed to one end of a vertical rod, and the vertical rod and the vertical plate are slidably connected vertically. A push rod is provided on the vertical rod that extends into the arc-shaped groove of the rotating disk.

[0015] Optionally, the side scraper assembly includes a side plate, which is a flat plate that matches the tunnel sidewall. The side plate is fixed to one end of a horizontal bar, and the horizontal bar is slidably connected to a vertical plate in the horizontal direction. A push rod is provided on the horizontal bar that extends into the arc groove of the turntable.

[0016] Optionally, the top scraper assembly and the side scraper assembly are staggered in the horizontal direction.

[0017] Optionally, the rotating disk is a gear disk, which meshes with a transmission gear, and the transmission gear is connected to a scraper drive component mounted on the vehicle body.

[0018] The beneficial effects of this invention are:

[0019] 1. The concrete spraying device for tunnel construction of the present invention is equipped with a vehicle body, on which a swing mechanism, a concrete supply mechanism, and a leveling mechanism are installed. The swing mechanism can spray concrete onto the inner wall of the tunnel. The top scraper assembly and side scraper assembly of the leveling mechanism can extend and, as the vehicle body moves, scrape the concrete sprayed onto the inner wall of the tunnel, ensuring uniform concrete spraying and avoiding concrete clumping. The entire process is automated, requiring no manual labor, resulting in high construction efficiency and low labor intensity. Furthermore, as tunnel construction progresses, only the movement of the vehicle body is needed to achieve concrete spraying and leveling, eliminating the need for repeated disassembly and assembly of the concrete spraying device, thus improving efficiency and shortening the construction cycle.

[0020] 2. The concrete spraying device for tunnel construction of the present invention uses a turntable to drive the top scraper assembly and the side scraper assembly to move synchronously through an arc groove, which can ensure the positional accuracy of the top scraper assembly and the side scraper assembly, ensure the uniformity of the concrete spraying thickness, and improve the quality of concrete spraying.

[0021] 3. The concrete spraying device for tunnel construction of the present invention has a bucket lid connected to a lifting mechanism, which allows the bucket lid to be removed from the storage bucket, facilitating the cleaning of the remaining concrete inside the storage bucket, preventing residue from remaining on the inner wall of the storage bucket and causing corrosion, and improving the service life of the storage bucket.

[0022] 4. The concrete spraying device for tunnel construction of the present invention has a second rocker arm, a telescopic rod and a spring, which makes the operation of the rocking mechanism more stable and ensures the quality of concrete spraying.

[0023] 5. In the concrete spraying device for tunnel construction of the present invention, the top scraper assembly and the side leveling assembly are staggered in the horizontal direction, so that the retraction of the top scraper assembly and the side scraper assembly do not affect each other, and the whole device is small in size when not in use, making it convenient to move and store. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0026] Figure 2This is a schematic diagram of the swing mechanism structure in Embodiment 1 of the present invention;

[0027] Figure 3 This is a schematic diagram of the support frame structure in Embodiment 1 of the present invention;

[0028] Figure 4 This is a schematic diagram of the lifting mechanism and stirring mechanism in Embodiment 1 of the present invention;

[0029] Figure 5 This is a schematic diagram of the bevel gear transmission box structure according to Embodiment 1 of the present invention;

[0030] Figure 6 This is a schematic diagram of the scraping mechanism structure in Embodiment 1 of the present invention;

[0031] Figure 7 This is a schematic diagram showing the location of the fourth motor in Embodiment 1 of the present invention;

[0032] Among them, 1. Vehicle body, 2. First vertical plate, 3. Swinging mechanism, 301. Support plate, 302. First slider, 303. First connecting rod, 304. First motor, 305. Slide groove, 306. First rocker arm, 307. Fixed seat, 308. Second rocker arm, 309. Second slider, 3010. Second connecting rod, 3011. Slide groove, 3012. Spring, 3013. Telescopic rod, 4. Stirring mechanism, 401. Third motor, 402. Stirring shaft, 403. Stirring blade, 5. Lifting mechanism, 501. Bracket, 502. Bucket lid, 503. Lead screw, 504. 505. Connecting rod; 505. Bevel gear transmission box; 5051. First bevel gear; 5052. Second bevel gear; 506. Slide rod; 507. Second motor; 508. Lifting guide rail; 6. Scraping mechanism; 601. Top plate; 602. Side plate; 603. Horizontal rod; 604. Gear; 605. Rotating disk; 606. Arc groove; 607. Horizontal slide rail; 608. Fourth motor; 7. Second vertical plate; 8. Storage tank; 9. Support frame; 901. Fixed plate; 902. First support vertical plate; 903. Support horizontal plate; 904. Second support vertical plate; 10. Ash pump. Detailed Implementation

[0033] Example 1

[0034] This embodiment provides a concrete spraying device for tunnel construction, such as... Figure 1As shown, the vehicle includes a vehicle body 1, on which a swing mechanism 3, a concrete supply mechanism, and a leveling mechanism 6 are sequentially arranged. In this embodiment, the swing mechanism 3 is installed at the front end of the vehicle body 1, the concrete supply mechanism is installed at the middle of the vehicle body 1, and the leveling mechanism 6 is installed at the rear end of the vehicle body. The discharge pipe of the concrete supply mechanism is connected to the swing mechanism 3. The swing mechanism 3 can drive the discharge pipe to swing. Through the swinging motion of the discharge pipe, concrete can be sprayed onto the arch and sidewall surfaces of the tunnel. The leveling mechanism 6 can level the concrete sprayed onto the inner surface of the tunnel.

[0035] The vehicle body 1 includes a flat panel, which has a flat structure. A front wheel is installed at the front end of the flat panel and a rear wheel is installed at the rear end. It can be understood that, in order to further reduce the labor intensity of construction workers, the front wheel or the rear wheel can be connected to a drive mechanism installed on the bottom of the flat panel. The drive mechanism can drive the front wheel or the rear wheel to rotate, thereby realizing the automatic movement of the vehicle body.

[0036] The front end of the vehicle is equipped with a swing mechanism 3, the middle is equipped with a concrete supply mechanism, and the rear end is equipped with a leveling mechanism 6.

[0037] In this embodiment, a first vertical plate 2 is installed at the front end of the vehicle body, a support frame 9 is installed in the middle, and a second vertical plate 7 is installed at the rear end. The first vertical plate 2 is installed at the front end of the vehicle body and cooperates with the swing mechanism 3. The support frame 9 is installed on one side of the first vertical plate 2 and cooperates with the concrete supply mechanism. The second vertical plate 7 is installed at the rear end of the vehicle body 1 and cooperates with the leveling mechanism 6. The vehicle body 1 is used to support the swing mechanism 3, the concrete supply mechanism, and the leveling mechanism 6, ensuring the normal operation of the entire device and improving the spraying efficiency and spraying quality of concrete.

[0038] like Figure 2 As shown, the rocking mechanism 3 includes a first rocker arm 306, which is made of channel steel. It includes a first arm and a second arm that is vertically arranged on both sides of the first arm. The first arm has a sliding groove 305, which is an elongated groove. The axis of the sliding groove 305 is arranged along the length of the first rocker arm 306. A first slider 302 is arranged in the internal space of the channel steel. The first slider has a guide block that extends into the sliding groove 305, so that the first slider 302 can slide along the axis of the first rocker arm 306. The sliding groove 305 and the guide block cooperate to limit the movement position of the first slider 302.

[0039] The first slider 302 is rotatably connected to one end of the first connecting rod 303 via a rotating shaft, and the other end of the first connecting rod 303 is fixedly connected to the output shaft of the swing drive. In this embodiment, the swing drive is a first motor 304, the output shaft of the first motor 304 is fixedly connected to the end of the first connecting rod 303, the first motor 304 is fixed on a motor base, and the motor base is fixed on one side of the support frame 9.

[0040] The bottom end of the first rocker arm 306 is rotatably connected to the fixed seat 307. The fixed seat 307 is directly fixed to the upper surface of the vehicle plate. In this embodiment, the fixed seat 307 adopts a U-shaped plate, including a first plate part arranged horizontally and a second plate part fixed vertically to the end of the first plate part. The first plate part is fixed to the upper surface of the vehicle body 1. The second plate part on one side is rotatably connected to the bottom end of the first rocker arm 306 through a rotating shaft. The axis of the rotating shaft is perpendicular to the center line of the first rocker arm 303 and the long axis of the slide groove 305 and is located in the same plane.

[0041] The top of the first rocker arm 303 is fixed with a support plate 301. The support plate 301 is fixed with the discharge pipe of the concrete supply mechanism. In this embodiment, the support plate is set as a Z-shaped plate. The discharge pipe of the concrete supply mechanism is set with two pipes, one of which is fixed to one end of the support plate 301 and the other is fixed to the other end of the support plate 301.

[0042] This setup increases the spraying range of a single shotcrete application, thus improving work efficiency.

[0043] In this embodiment, the discharge pipe of the concrete supply mechanism is a flexible pipe to allow it to swing with the support plate.

[0044] During operation, the guide block connecting the first connecting rod 303 to the first slider 302 is at the top of the slide groove 305. The first motor 304 drives the first connecting rod 303 to rotate around the output shaft of the first motor 304, so that the first connecting rod 303 drives the first slider 302 to slide along the first rocker arm. When the first connecting rod 303 is in a horizontal position, the first slider 302 is just at the middle position of the first rocker arm 306. The first rocker arm 306 is at the swing limit position on one side. If the first connecting rod 303 continues to rotate, the first connecting rod 303 continues to move downward. When the guide block is at the bottom of the slide groove 305, the first rocker arm 306 returns to its original position, the first connecting rod 303 continues to move, and the first rocker arm 306 rotates to the limit position on the other side, thereby realizing the reciprocating swing of the first rocker arm 306.

[0045] Since the first rocker arm 306 cannot be rotated to a horizontal position, the spraying range of concrete can be increased as much as possible by adjusting the angle of the discharge end of the discharge pipe fixed by the support plate 303.

[0046] To ensure the smoothness of the swing mechanism and thus improve the quality of concrete spraying, the swing mechanism in this embodiment also includes a second rocker arm 308.

[0047] The bottom end of the second rocker arm 308 is rotatably connected to another second plate of the fixed base 307 via a rotating shaft. The second rocker arm 308 is also made of channel steel and has the same size as the first rocker arm 306. The second arm of the second rocker arm 308 is provided with a sliding groove 3011. The sliding groove 3011 is a long strip groove and is set along the length direction of the second rocker arm 308.

[0048] The top of the second rocker arm 308 is fixed to the support plate 301. While the first rocker arm 308 drives the support plate 301 to rotate, the support plate 301 can drive the second rocker arm 308 to rotate passively.

[0049] A second slider 309 is provided inside the second rocker arm 308. The second slider 309 is slidably connected to the second rocker arm 308. The second slider 309 is provided with a guide block that extends into the slide groove 3011 of the second rocker arm 308. The top surface of the second slider 309 is fixed to one end of the telescopic rod 3013. The other end of the telescopic rod 3013 is fixedly connected to the support plate 301. A spring 3012 is sleeved on the outer periphery of the telescopic rod 3013. One end of the spring 3012 contacts the support plate 301, and the other end contacts the second slider 309.

[0050] The second slider 309 is rotatably connected to one end of the second connecting rod 3010 via a rotating shaft, and the other end of the second connecting rod 3010 is rotatably connected to the first vertical plate 2 at the front end of the vehicle board via a rotating shaft.

[0051] In this embodiment, the second rocker arm 308, telescopic rod 3013, spring 3012, and second connecting rod 3010 provide two-point support for the support plate, ensuring its stability. Simultaneously, the spring ensures that the second slider is always subjected to an elastic force during movement, buffering its motion and making the swing mechanism 3 more stable during swinging. This improves the service life of the swing mechanism and ensures the quality and efficiency of concrete spraying.

[0052] Both the first rocker arm 306 and the second rocker arm 308 are made of channel steel, which facilitates the replacement and maintenance of the rocker arms and their internal sliders, improves the efficiency of later replacement and maintenance, and ensures the normal operation of the rocking mechanism.

[0053] like Figure 3As shown, the support frame includes a first support vertical plate 902, a second support vertical plate 904, a support horizontal plate 903, and a fixing plate 901. The first support vertical plate 902 and the second support vertical plate 904 are vertically fixedly installed on the vehicle board. The support horizontal plate 903 is horizontally arranged between the bottoms of the first support vertical plate 902 and the second support vertical plate 904 and is fixedly installed on the first support vertical plate 902 and the second support vertical plate 904. The fixing plate 901 is fixedly installed on the first support vertical plate 902 and the second support vertical plate 904, above the support horizontal plate 903. Both the support horizontal plate 903 and the fixing plate 901 are provided with mounting holes that cooperate with the storage tank of the concrete supply mechanism. The support frame 9 is used to support the storage tank of the concrete supply mechanism, ensuring the safety of concrete and normal concrete spraying, and improving the efficiency of concrete spraying.

[0054] The concrete supply mechanism includes a storage tank 8 with an open top. The storage tank 8 is used to hold concrete. After passing through the mounting hole provided in the fixing plate 901, the storage tank is placed on the support plate 903. The fixing plate 901 is used to position and fix the storage tank 8.

[0055] A ash pump 10 is installed below the storage tank 8. The ash pump 10 is located below the support plate 903 and is directly fixed to the vehicle plate. The inlet of the ash pump 10 is connected to the outlet of the storage tank 8 through the feed pipe. The feed pipe passes through the mounting hole on the support plate 903 and is connected to the storage tank 8. The outlet of the ash pump 10 is connected to one end of the discharge pipe, and the other end of the discharge pipe is installed to the support plate 301 of the swing mechanism 3.

[0056] In this embodiment, the ash pump 10 is placed below the storage tank 8, which reduces the horizontal space occupied by the concrete supply mechanism and thus reduces the area of ​​the vehicle body.

[0057] The ash pump 10 can drive the concrete in the storage tank 8 to flow out of the storage tank and be sprayed out through the discharge pipe.

[0058] The top opening of storage bucket 8 is equipped with a bucket lid, which can open and close the storage bucket.

[0059] To facilitate the cleaning of residual concrete inside the storage tank and prevent residue from remaining on the inner wall of the tank and causing corrosion, the tank lid is connected to a lifting mechanism 5 installed on the vehicle platform. The lifting mechanism 5 can lift the tank lid, thereby opening the storage tank 8 and making it easier for staff to clean the residual concrete inside the storage tank 8.

[0060] like Figure 4As shown, the lifting mechanism 5 adopts a screw lifting mechanism, which includes a screw 503 with its axis arranged vertically. The screw 503 is located on one side of the second support vertical plate 904. The bottom end of the screw 503 is connected to the lifting drive mechanism, and the top end of the screw is rotatably connected to the bearing seat. The bearing seat is fixed on the second support vertical plate 904.

[0061] The lead screw is threadedly connected to a connecting rod 504. Both ends of the connecting rod 504 are fixed with slide rods 506. The slide rods 506 are slidably connected to the lifting guide rail 508. The lifting guide rail 508 is fixed on the second support vertical plate 904.

[0062] The top of the slide bar 506 is fixedly connected to the bracket 501, and the bracket 501 is fixedly connected to the bucket lid 502.

[0063] The lifting drive mechanism includes a second motor 507 fixed to the vehicle platform. The output shaft of the second motor 507 is connected to a bevel gear transmission box 505, and the output shaft of the bevel gear transmission box 505 is connected to the bottom end of a lead screw 503. Specifically, as shown... Figure 5 As shown, the bevel gear transmission box 505 includes a box body, and a first bevel gear 5051 and a second bevel gear 5052 that mesh with each other are provided inside the box body. The first bevel gear 5051 is connected to the output shaft of the second motor 507, and the second bevel gear 5052 is connected to the output shaft of the bevel gear transmission box.

[0064] A stirring mechanism 4 is also fixed on the lid 502. The stirring mechanism 4 can extend into the storage tank 8 and stir the concrete in the storage tank 8 to ensure the quality of the concrete.

[0065] like Figure 4 As shown, the stirring mechanism includes a stirring drive component, which is a third motor 401. The third motor 401 is fixed on the top surface of the bucket cover 502. The output shaft of the third motor 401 is connected to the stirring shaft 402, which can extend into the storage bucket 8.

[0066] Multiple sets of stirring blades 403 are provided on the outer shaft surface of the stirring shaft 402. The multiple sets of stirring blades 403 are arranged along the axial direction of the stirring shaft 402. Each set of stirring blades 403 has multiple blades, and the multiple stirring blades 403 are arranged at equal intervals along the circumference of the stirring shaft 402. In this embodiment, each set has three stirring blades.

[0067] The lid 501 is also equipped with a filling port for adding concrete into the storage tank.

[0068] In this embodiment, concrete is added into the storage tank through the injection port, and then the third motor 401 is started to stir the concrete in the storage tank 8 to prevent the concrete from clumping. The ash pump 10 is started, and the ash pump 10 drives the concrete in the storage tank 8 to flow out and spray it out after flowing through the discharge pipe to spray concrete onto the inner wall of the tunnel.

[0069] After the concrete spraying work is completed, the second motor 507 starts, the lifting mechanism 5 works, and the bucket lid 501 is lifted, so that the construction personnel can clean the residual concrete in the storage bucket 8.

[0070] The leveling mechanism includes a top scraper assembly, with side scraper assemblies on both sides of the top scraper assembly. The top scraper assembly is used to level the concrete at the tunnel arch, and the side scraper assemblies are used to level the concrete at the tunnel sidewalls.

[0071] The top scraper assembly and the side leveling assembly are staggered in the horizontal direction, so that the retraction of the top scraper assembly and the side scraper assembly do not affect each other. This makes the whole device small in size when not in use, which facilitates the transfer and storage of the whole device.

[0072] like Figures 5-6 As shown, the top scraper assembly includes a top plate 601, which is an arc-shaped plate that matches the shape of the tunnel arch. The bottom surface of the arc-shaped plate is fixedly connected to the top of the vertical rod through a box-shaped structure with an inverted trapezoidal cross-section. The vertical rod is slidably connected to a vertical slide rail set on the second vertical plate, and the vertical rod can move vertically along the vertical slide rail.

[0073] A push rod is provided on the vertical rod, and the push rod extends into the first arc-shaped groove opened in the rotating disk 605 on one side of the second vertical plate.

[0074] The rotating disk 605 rotates around its own axis and can drive the vertical rod to move vertically along the vertical slide rail through the first arc groove and the push rod.

[0075] The side scraper assembly includes a side plate 602, which is a flat plate that matches the shape of the tunnel sidewall. The side plate is fixedly connected to one end of a horizontal bar 603. The horizontal bar 603 is slidably connected to a horizontal slide rail 607 provided on the second vertical plate 7. The horizontal bar 603 can move horizontally along the horizontal slide rail 607.

[0076] A push rod is provided on the horizontal bar 603. The push rod extends into the arc-shaped groove 606 opened on the rotating disk 602. The push rod of one side scraper assembly extends into the second arc-shaped groove opened on the rotating disk, and the push rod of the other side scraper assembly extends into the third arc-shaped groove opened on the rotating disk.

[0077] The first, second, and third arc-shaped grooves are configured such that when the rotating disk rotates, the vertical rod can move vertically and the horizontal rod 603 can move horizontally by utilizing the thrust of the arc-shaped grooves and the push rod. The movements of the vertical rod and the horizontal rod 603 are synchronous, and the two horizontal rods 603 move in opposite directions.

[0078] This configuration ensures that the top plate 601 and the side plate 602 move synchronously, thereby ensuring the uniformity of the thickness of the sprayed concrete when leveling the concrete sprayed on the tunnel wall.

[0079] In this embodiment, the center of the rotating disk 605 is rotatably connected to the second vertical plate 7 via a rotating shaft, and the rotating disk 605 can rotate around its own axis.

[0080] The rotating disk 605 is connected to the rotation drive mechanism, which can drive the rotating disk 605 to rotate around its own axis.

[0081] The rotation drive mechanism adopts a gear transmission drive mechanism. Specifically, the rotating disk 605 is a gear disk with teeth on its outer circumference. The rotating disk 605 meshes with the gear 604. The gear 604 is connected to the output shaft of the fourth motor 608 fixed on the second vertical plate 7. The fourth motor 608 can drive the gear 604 to rotate, thereby driving the rotating disk 605 to rotate.

[0082] The working method of this embodiment is as follows:

[0083] When the vehicle moves to the set position inside the tunnel, the ash pump 10 and the first motor 304 are started. The first motor 304 drives the support plate 301 to swing through the first rocker arm 306, which in turn drives the discharge pipe of the concrete supply mechanism to swing, spraying concrete on the inner wall of the tunnel. When spraying concrete, the third motor 401 works, using the mixing blades 403 to continuously stir the concrete in the storage tank 8 to prevent the concrete in the storage tank 8 from clumping.

[0084] The fourth motor 608 drives the rotating disk 605 to rotate through the gear 604, so that the top plate 601 and the side plate 602 move to the set position, which meets the requirements of the leveling and thickness of the concrete spraying on the inner wall of the tunnel.

[0085] As the vehicle moves forward, the top and side panels scrape the concrete sprayed onto the tunnel walls, preventing uneven spraying and clumping.

[0086] In this embodiment, a track for the vehicle to travel on can be laid in advance in the tunnel to ensure that the vehicle's direction of travel does not deviate, thereby ensuring the effect of concrete spraying.

[0087] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A concrete spraying device for tunnel construction, characterized in that, The system includes a vehicle body, which is equipped with a swaying mechanism, a concrete supply mechanism, and a leveling mechanism. The discharge pipe of the concrete supply mechanism is connected to the swaying mechanism. The leveling mechanism includes a top scraper assembly, with side scraper assemblies on both sides of the top scraper assembly. The top scraper assembly is slidably connected to a vertical plate fixed to the vehicle body in a vertical direction, and the side scraper assemblies are slidably connected to the vertical plate in a horizontal direction. Both the vertical and horizontal scraper assemblies are equipped with push rods that extend into the arc-shaped grooves of the rotating disk so that when the rotating disk rotates, it can drive the vertical and horizontal scraper assemblies to move synchronously through the arc-shaped grooves and push rods. As the vehicle body moves, the concrete sprayed on the inner wall of the tunnel is leveled. The rotating disk is a gear disk, which meshes with a transmission gear, and the transmission gear is connected to a scraper drive component installed on the vehicle body; The swing mechanism includes a first rocker arm, the bottom end of which is rotatably connected to a fixed seat on the vehicle body, a support plate at the top of the first rocker arm, the support plate being fixed to the discharge pipe, a first slider slidably connected to the first rocker arm, the first slider being rotatably connected to one end of a first connecting rod, and the other end of the first connecting rod being connected to the swing drive component. The rocking mechanism also includes a second rocker arm, the bottom end of which is rotatably connected to a fixed base. A second slider is slidably connected to the second rocker arm. The second slider is fixed to the bottom end of a telescopic rod. The top end of the telescopic rod is fixed to a support plate. A spring is also provided on the outer periphery of the telescopic rod. One end of the spring contacts the support plate, and the other end contacts the second slider. The top scraper assembly includes a top plate, which is an arc-shaped plate that matches the tunnel arch. The top plate is fixed to one end of a vertical rod, and the vertical rod and the vertical plate are slidably connected in the vertical direction. A push rod is provided on the vertical rod that extends into the arc-shaped groove of the rotating disk. The side scraper assembly includes a side plate, which is a flat plate that matches the tunnel sidewall. The side plate is fixed to one end of a horizontal rod, and the horizontal rod and the vertical plate are slidably connected in the horizontal direction. A push rod is provided on the horizontal rod that extends into the arc-shaped groove of the rotating disk. This arrangement ensures the uniformity of the thickness of the sprayed concrete.

2. The concrete spraying device for tunnel construction as described in claim 1, characterized in that, The concrete supply mechanism includes a storage tank with an open top, a lid on top of the storage tank, a mixing mechanism installed on the lid, and a mortar pump. The inlet of the mortar pump is connected to the storage tank through a feed pipe, and the outlet of the mortar pump is connected to one end of a discharge pipe, while the other end of the discharge pipe is connected to a swinging mechanism.

3. The concrete spraying device for tunnel construction as described in claim 2, characterized in that, The bucket lid is connected to a lifting mechanism installed on the vehicle body.

4. A concrete spraying device for tunnel construction as described in claim 2, characterized in that, The stirring mechanism includes a stirring drive fixed to the lid of the container, which is connected to a stirring shaft that can extend into the storage container. The stirring shaft is fixed with multiple stirring blades.

5. A concrete spraying device for tunnel construction as described in claim 1, characterized in that, The top scraper assembly and the side scraper assembly are staggered in the horizontal direction.

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