A concrete spraying device for tunnel construction

Abstract

The present invention belongs to the technical field of concrete spraying devices, and particularly relates to a concrete spraying device for tunnel construction, which includes a concrete pressurizing assembly and an operation vehicle. The concrete pressurizing assembly is arranged on the operation vehicle, and the concrete pressurizing assembly includes a concrete hopper, a pressurizing pump assembly, a driving assembly, and a voltage stabilizing device. In the present invention, the flywheel of the driving assembly rotates to drive the pressurizing pump assembly to pump concrete into the pressure stabilizing tank of the voltage stabilizing device. The pressure stabilizing plate in the pressure changing cylinder of the voltage stabilizing device converts a part of the kinetic energy of the concrete into the elastic potential energy of the pressure stabilizing plate spring, reducing the maximum pressure value and increasing the minimum pressure value under the original increasing and decreasing pressure that changes in a sine curve. At the same time, through the regulating valve of the voltage stabilizing device, its increasing and decreasing effect is adjusted to solve the problem that the material rebound rate increases due to the unstable pressure of concrete spraying.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete spraying devices, and particularly relates to a concrete spraying device for tunnel construction. Background Art

[0002] Shotcrete is a construction method of spraying and pouring fine aggregate concrete with a pressure spray gun, and is often used for pouring thin-walled structures such as tunnel linings, walls, and ceilings, or linings of other structures and protective layers of steel structures. During tunnel construction, wet concrete spraying machines are mostly used.

[0003] Most wet concrete spraying machines adopt a pumping method, in which a crank mechanism drives two main cylinders to act alternately, driving the pistons in their respective piston cylinders to pump out concrete periodically. The piston moves linearly in a sinusoidal curve. When the angular velocity is fixed, the linear velocity change of the piston at both ends is very small, and the pressure change trend at this time is slow, resulting in unstable concrete spraying pressure, which in turn increases the material rebound rate. Moreover, the pulsating change of this pumping pressure also applies an alternating load to vulnerable parts such as concrete conveying pipes, reducing the service life of vulnerable parts. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides a concrete spraying device for tunnel construction. The driving motor of the driving assembly drives the flywheel at the bottom of the motor shaft to rotate, and the push rod at the bottom of the flywheel drives the piston assembly of the booster pump assembly to move. During the process, the push rod periodically pushes the right piston rod and the left piston rod to move, and then pumps the concrete into the pressure stabilizing tank of the pressure stabilizing device. The pressure inside the pressure stabilizing tank regularly increases from gradually increasing to gradually decreasing as the flywheel rotates. When the pressure inside the pressure stabilizing tank gradually increases, it will push the pressure stabilizing plate in the pressure changing cylinder to move upward, and the pressure stabilizing plate spring is compressed, thereby converting a part of the kinetic energy of the concrete into the elastic potential energy of the pressure stabilizing plate spring, which is stored. During the process of the gradual decrease of the pressure inside the pressure stabilizing tank, the pressure stabilizing plate spring pushes the pressure stabilizing plate to move downward, and the elastic potential energy of the pressure stabilizing plate spring is converted into the kinetic energy of the concrete. At the same time, there will be a short vacuum period when the push rod rotates from the right rod groove of the right piston rod to the left rod groove of the left piston rod, leaving a rebound time for the pressure stabilizing plate. Under the original increasing and decreasing pressure with a sinusoidal curve change, the maximum pressure value is reduced, the minimum pressure value is increased, and at the same time, through the regulating valve of the pressure stabilizing device, its increasing and decreasing effect is adjusted to cope with concrete of different viscosities, effectively solving the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a concrete spraying device for tunnel construction, which includes a concrete pressurizing component and a working vehicle. The concrete pressurizing component is arranged on the working vehicle. The concrete pressurizing component includes a concrete hopper, a pressurizing pump component, a driving component and a voltage stabilizing device. The voltage stabilizing device is fixed on the working vehicle. The pressurizing pump component is arranged on the voltage stabilizing device. The concrete hopper is arranged on the top of the pressurizing pump component. The driving component is arranged on the side wall of the concrete hopper;

[0006] An arc-shaped groove and a auger groove are provided at the bottom of the concrete hopper. A material distribution net is arranged above the interior of the concrete hopper. An auger is arranged in the auger groove. An auger driving wheel is arranged at the end of the auger. The auger driving wheel is located outside the concrete hopper. Two feeding pipes are provided at both ends of the bottom of the arc-shaped groove. One-way valves are arranged in the feeding pipes;

[0007] The pressurizing pump component includes a pressurizing pump tank and a piston component. The piston component is arranged in the pressurizing pump tank. The pressurizing pump tank is arranged at the bottom of the feeding pipe. The two feeding pipes are respectively located at both ends of the top of the pressurizing pump tank. A piston rod sliding groove is provided at the center of the tank wall at the rear side of the pressurizing pump tank.

[0008] Further, the piston component is provided with two piston plates. The piston plates slide in the pressurizing pump tank. The two piston plates are respectively provided with a right piston rod and a left piston rod. A piston spring is arranged between the two piston plates. The right piston rod and the left piston rod slide on the piston rod sliding groove. The right piston rod is arranged above the left piston rod. A right rod groove is arranged outside the right piston rod. A left rod groove is arranged inside the left piston rod.

[0009] Further, the driving component includes a driving motor and a gear transmission component. The driving motor is fixed on the side wall of the concrete hopper. A motor shaft is arranged at the bottom of the driving motor. A motor bevel gear is arranged on the motor shaft. A flywheel is arranged at the bottom of the motor shaft. A push rod is arranged at the edge of the bottom surface of the flywheel. The flywheel is arranged above the right piston rod. When the flywheel rotates, the push rod is periodically and alternately located in the right rod groove or the left rod groove.

[0010] Further, the gear transmission component rotates at the bottom of the auger groove. A main transmission wheel is arranged at the front end of the gear transmission component. A transmission bevel gear is arranged on the main transmission wheel. The main transmission wheel and the auger driving wheel are connected by a transmission belt. The transmission bevel gear is meshed and connected with the motor bevel gear.

[0011] Further, the voltage stabilizing device includes a voltage stabilizing tank and a voltage-changing cylinder. Feed pipes are provided at both ends of the front side of the voltage stabilizing tank. The feed pipes are respectively connected to both ends of the bottom of the pressurizing pump tank. The voltage-changing cylinder is arranged at the top of the rear side of the voltage stabilizing tank. A pressurized discharge pipe is arranged at the bottom of the voltage stabilizing tank.

[0012] Further, a bushing sliding cylinder is provided at the top of the pressure transformation cylinder. A scale groove is provided on the bushing sliding cylinder. A pressure stabilizing plate is provided inside the pressure transformation cylinder. A pressure stabilizing plate spring is provided at the top of the pressure stabilizing plate. The end of the pressure stabilizing plate spring is provided on the top wall of the pressure transformation cylinder. The pressure stabilizing plate is slidably arranged inside the pressure transformation cylinder.

[0013] Further, a pressure stabilizing plate threaded bushing is further provided on the pressure stabilizing plate. The pressure stabilizing plate threaded bushing is located at the center of the pressure stabilizing plate spring. The pressure stabilizing plate threaded bushing is slidably arranged inside the bushing sliding cylinder. A regulating valve is provided on the bushing sliding cylinder. A threaded rod is provided at the bottom of the regulating valve. The threaded rod is threadedly connected to the pressure stabilizing plate threaded bushing.

[0014] Further, an operation cab and a spraying control arm are provided at the front side of the operation vehicle. The spraying control arm is located on the left side of the operation cab. A concrete spraying hose is provided on the spraying control arm. A concrete nozzle is provided at the front end of the spraying control arm. One end of the concrete spraying hose is connected to the pressurized discharge pipe. The other end of the concrete spraying hose is connected to the concrete nozzle.

[0015] The beneficial effects achieved by the present invention with the above structure are as follows:

[0016] 1. The material distribution net of the concrete hopper can block the aggregate with too large particles, preventing the too large aggregate from blocking the pipeline or the one-way valve. Because the viscosity of the concrete is relatively high and the fluidity is relatively poor, while the auger in the concrete hopper stirs the concrete, the concrete is pushed towards the arc-shaped groove, preventing the pressure boosting pump tank from having air suction and affecting the pressure boosting of the pressure boosting pump tank during the concrete spraying.

[0017] 2. The driving motor drives the flywheel at the bottom of the motor shaft to rotate. When the push rod at the bottom of the flywheel enters the right rod groove, the push rod will push the right piston rod to move rightward. As the push rod rotates to a position close to the left rod groove, it will disengage from the right rod groove and enter the left rod groove, thereby driving the left piston rod to move leftward, achieving the technical effect of the push rod on the flywheel alternately pushing the right piston rod and the left piston rod, and achieving the purpose of pressurizing the concrete by the pressure boosting pump assembly.

[0018] 3. As the flywheel rotates, when the push rod is in the right rod groove and drives the right rod groove to move towards the left rod groove, the right piston rod will push the piston plate connected to it to move. The piston plate will squeeze the concrete on its side and pump the concrete into the pressure stabilizing tank. When the push rod rotates to the position closest to the booster pump tank, the moving speed of the piston plate is the maximum, and the pressure pumped into the pressure stabilizing tank is the maximum. At this time, the increased internal pressure of the pressure stabilizing tank will push the pressure stabilizing plate upward, causing the volume of the pressure stabilizing tank to increase, thereby reducing the excessive and rapid change of the internal pressure of the pressure stabilizing tank, that is, converting a part of the kinetic energy of the concrete into the elastic potential energy of the pressure stabilizing plate spring. As the push rod gradually pushes the right rod groove closer to the left rod groove, when the push rod slides out of the right rod groove, the right rod groove has not yet moved to the end closest to the left rod groove. At this time, the acceleration of the moving piston plate is not zero, that is, the piston plate on the side of the right piston rod still has pumping pressure. At the same time, the pressure of the booster pump tank for pumping concrete decreases, causing the pressure stabilizing plate spring to push the pressure stabilizing plate downward to stabilize the internal pressure of the pressure stabilizing tank, that is, converting the elastic potential energy of the pressure stabilizing plate spring into the kinetic energy of the concrete. There is a certain time difference between the process of the push rod sliding out of the right rod groove and the process of the push rod turning into the left rod groove and driving the left rod groove to move. This short period of time is the process of the pressure stabilizing plate spring pushing the pressure stabilizing plate downward. At this time, the pressure of the concrete discharged from the booster discharge pipe is the pressure given by the pressure stabilizing plate. Under the original sinusoidal curve-changing increasing and decreasing pressure, the maximum pressure value is reduced, and the minimum pressure value is increased, thereby achieving the technical effect of improving the stability of the concrete spraying pressure. At the same time, when the pressure increases next time, the pressure stabilizing plate has room to move upward, otherwise the pressure stabilizing plate will lose the pressure stabilizing effect.

[0019] 4. Different types of concrete have different mixing ratios, and the viscosities after mixing are also different. By rotating the regulating valve, the threaded rod at the bottom of the regulating valve drives the pressure stabilizing plate to move up and down, thereby adjusting the initial pressure of the pressure stabilizing plate spring and simultaneously adjusting the volume of the pressure stabilizing tank. At a fixed power of the driving motor, the volume of the pumped concrete remains unchanged. When the volume of the pressure stabilizing tank increases, the maximum and minimum values of the internal pressure of the pressure stabilizing tank decrease, and vice versa, increasing the maximum and minimum values of the internal pressure of the pressure stabilizing tank, achieving the technical effect of regulating the spraying pressure of the concrete nozzle according to different viscosities of concrete, thereby reducing the rebound rate of concrete materials. Description of the Drawings

[0020] Figure 1 Is a three-dimensional view of a concrete spraying device for tunnel construction proposed by the present invention;

[0021] Figure 2 Is a three-dimensional view of the concrete booster assembly of a concrete spraying device for tunnel construction proposed by the present invention;

[0022] Figure 3 Is a front view of the concrete booster assembly of a concrete spraying device for tunnel construction proposed by the present invention;

[0023] Figure 4 is Figure 3 a sectional view along cutting plane A-A in

[0024] Figure 5 is Figure 3 a sectional view along cutting plane B-B in

[0025] Figure 6 is Figure 4 a sectional view along cutting plane C-C in

[0026] Figure 7 a schematic structural view of a piston assembly of a concrete spraying device for tunnel construction proposed by the present invention;

[0027] Figure 8 is Figure 4 a partial enlarged view at position I in

[0028] Figure 9 is Figure 5 a partial enlarged view at position II in

[0029] Wherein, 1, concrete pressurization assembly, 2, operation vehicle, 21, control room, 22, spraying control arm, 23, concrete spraying hose, 24, concrete nozzle, 3, concrete hopper, 31, arc groove, 32, auger groove, 33, distribution screen, 34, auger, 341, auger drive wheel, 35, blanking pipe, 4, booster pump assembly, 41, booster pump tank, 411, piston rod chute, 42, piston assembly, 421, right piston rod, 4211, right rod groove, 422, left piston rod, 4221, left rod groove, 423, piston spring, 5, drive assembly, 51, drive motor, 52, motor shaft, 521, motor bevel gear, 522, flywheel, 523, push rod, 53, gear transmission member, 531, transmission bevel gear, 532, main drive wheel, 6, voltage stabilizing device, 61, voltage stabilizing tank, 611, feed pipe, 612, pressurized discharge pipe, 62, pressure changing cylinder, 621, sleeve sliding cylinder, 622, scale groove, 63, pressure stabilizing plate, 631, pressure stabilizing plate threaded bushing, 632, pressure stabilizing plate spring, 64, regulating valve, 641, threaded rod.

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] As Figures 1-9 shown, the present invention provides a concrete spraying device for tunnel construction, which includes a concrete pressurizing assembly 1 and a working vehicle 2. The concrete pressurizing assembly 1 is arranged on the working vehicle 2. The concrete pressurizing assembly 1 includes a concrete hopper 3, a booster pump assembly 4, a driving assembly 5 and a voltage stabilizing device 6. The voltage stabilizing device 6 is fixed on the working vehicle 2. The booster pump assembly 4 is arranged on the voltage stabilizing device 6. The concrete hopper 3 is arranged on the top of the booster pump assembly 4. The driving assembly 5 is arranged on the side wall of the concrete hopper 3;

[0034] An arc-shaped groove 31 and a screw groove 32 are provided at the bottom of the concrete hopper 3. A material distribution net 33 is provided above the interior of the concrete hopper 3. A screw 34 is arranged in the screw groove 32. A screw driving wheel 341 is arranged at the end of the screw 34. The screw driving wheel 341 is located outside the concrete hopper 3. Two ends at the bottom of the arc-shaped groove 31 are provided with blanking pipes 35. One-way valves are arranged in the blanking pipes 35;

[0035] The booster pump assembly 4 includes a booster pump tank 41 and a piston assembly 42. The piston assembly 42 is arranged in the booster pump tank 41. The booster pump tank 41 is arranged at the bottom of the blanking pipe 35. The two blanking pipes 35 are respectively located at both ends of the top of the booster pump tank 41. A piston rod sliding groove 411 is provided at the center of the tank wall at the rear side of the booster pump tank 41.

[0036] The piston assembly 42 is provided with two piston plates which slide in the booster pump tank 41. The two piston plates are respectively provided with a right piston rod 421 and a left piston rod 422. A piston spring 423 is arranged between the two piston plates. The right piston rod 421 and the left piston rod 422 slide on the piston rod sliding groove 411. The right piston rod 421 is arranged above the left piston rod 422. A right rod groove 4211 is arranged outside the right piston rod 421. A left rod groove 4221 is arranged inside the left piston rod 422.

[0037] The driving assembly 5 includes a driving motor 51 and a gear transmission member 53. The driving motor 51 is fixed on the side wall of the concrete hopper 3. A motor shaft 52 is provided at the bottom of the driving motor 51. A motor bevel gear 521 is provided on the motor shaft 52. A flywheel 522 is provided at the bottom of the motor shaft 52. A push rod 523 is provided at the bottom edge of the bottom surface of the flywheel 522. The flywheel 522 is arranged above the right piston rod 421. When the flywheel 522 rotates, the push rod 523 is periodically and alternately located in the right rod groove 4211 or the left rod groove 4221.

[0038] The gear transmission member 53 rotates at the bottom of the auger groove 32. A main transmission wheel 532 is provided at the front end of the gear transmission member 53. A transmission bevel gear 531 is provided on the main transmission wheel 532. The main transmission wheel 532 is connected to the auger transmission wheel 341 through a transmission belt. The transmission bevel gear 531 is meshed and connected with the motor bevel gear 521.

[0039] The voltage stabilizing device 6 includes a voltage stabilizing tank 61 and a voltage transformation cylinder 62. Feed pipes 611 are provided at both ends of the front side of the voltage stabilizing tank 61. The feed pipes 611 are respectively connected to both bottom ends of the booster pump tank 41. The voltage transformation cylinder 62 is arranged at the top of the rear side of the voltage stabilizing tank 61. A booster discharge pipe 612 is provided at the bottom of the voltage stabilizing tank 61.

[0040] A sleeve sliding cylinder 621 is provided at the top of the voltage transformation cylinder 62. A scale groove 622 is provided on the sleeve sliding cylinder 621. A voltage stabilizing plate 63 is provided in the voltage transformation cylinder 62. A voltage stabilizing plate spring 632 is provided at the top of the voltage stabilizing plate 63. The end of the voltage stabilizing plate spring 632 is arranged on the top wall of the voltage transformation cylinder 62. The voltage stabilizing plate 63 is slidably arranged in the voltage transformation cylinder 62.

[0041] A voltage stabilizing plate threaded bushing 631 is further provided on the voltage stabilizing plate 63. The voltage stabilizing plate threaded bushing 631 is located at the center of the voltage stabilizing plate spring 632. The voltage stabilizing plate threaded bushing 631 is slidably arranged in the sleeve sliding cylinder 621. A regulating valve 64 is provided on the sleeve sliding cylinder 621. A threaded rod 641 is provided at the bottom of the regulating valve 64. The threaded rod 641 is threadedly connected to the voltage stabilizing plate threaded bushing 631.

[0042] An operation cab 21 and a spraying control arm 22 are provided on the front side of the work vehicle 2. The spraying control arm 22 is located on the left side of the operation cab 21. A concrete spraying hose 23 is provided on the spraying control arm 22. A concrete nozzle 24 is provided at the front end of the spraying control arm 22. One end of the concrete spraying hose 23 is connected to the booster discharge pipe 612, and the other end of the concrete spraying hose 23 is connected to the concrete nozzle 24.

[0043] During specific use, the work vehicle 2 is driven into the tunnel, and the concrete mixer truck injects concrete into the concrete hopper 3. The drive motor 51 drives the motor shaft 52 to rotate. The motor bevel gear 521 on the motor shaft 52 drives the gear transmission member 53 to rotate. The main drive wheel 532 of the gear transmission member 53 drives the auger 34 to rotate through a transmission belt. The auger 34 stirs the concrete in the concrete hopper 3 and at the same time pushes the concrete into the arc-shaped groove 31.

[0044] During the rotation of the motor shaft 52, the flywheel 522 at its bottom is driven to rotate. The flywheel 522 drives the push rod 523 of the bottom plate to rotate. When the push rod 523 is in the right rod groove 4211 and drives the right rod groove 4211 to move towards the left rod groove 4221 on the right side, the right piston rod 421 will push the right piston plate to move. The piston plate will squeeze the concrete inside the right side of the booster pump tank 41. The concrete enters the pressure stabilizing tank 61 through the feed pipe 611. At the same time, the piston spring 423 is stretched. As the push rod 523 gradually pushes the right rod groove 4211 closer to the left rod groove 4221, during the process when the push rod 523 slides out of the right rod groove 4211, the pressure inside the pressure stabilizing tank 61 gradually increases and then gradually decreases. When the pressure inside the pressure stabilizing tank 61 gradually increases, it will push the pressure stabilizing plate 63 inside the pressure changing cylinder 62 to move upward, and the pressure stabilizing plate spring 632 is compressed. Thus, a part of the kinetic energy of the concrete is converted into the elastic potential energy of the pressure stabilizing plate spring 632. During the process when the pressure inside the pressure stabilizing tank 61 gradually decreases, the pressure stabilizing plate spring 632 pushes the pressure stabilizing plate 63 to move downward, and the elastic potential energy of the pressure stabilizing plate spring 632 is converted into the kinetic energy of the concrete.

[0045] As the push rod 523 slides out of the right rod groove 4211, the right piston plate on the right side is driven by the piston spring 423 to move towards the left side. The one-way valve of the lower discharge pipe 35 on the right side of the booster pump tank 41 opens, and the concrete enters the booster pump tank 41. When the push rod 523 drives the right piston rod 421 to move next time, as the flywheel 522 rotates, it drives the push rod 523 to rotate into the left rod groove 4221 and pushes the left rod groove 4221 to move towards the left side, thus repeating the above process. The concrete inside the pressure stabilizing tank 61 surges into the concrete spraying hose 23 from the booster discharge pipe 612 and is sprayed onto the tunnel wall from the concrete nozzle 24 at the end of the concrete spraying hose 23. Observe the situation of the material rebounding and falling off during concrete spraying. By rotating the regulating valve 64, the threaded rod 641 at the bottom of the regulating valve 64 drives the pressure stabilizing plate 63 to move up and down, thereby adjusting the initial pressure of the pressure stabilizing plate spring 632 and at the same time adjusting the volume of the pressure stabilizing tank 61. At a fixed power of the drive motor 51, the volume of the pumped concrete remains unchanged. When the volume of the pressure stabilizing tank 61 increases, the maximum and minimum values of the pressure inside the pressure stabilizing tank 61 decrease. On the contrary, the maximum and minimum values of the pressure inside the pressure stabilizing tank 61 increase, thereby regulating the spraying pressure of the concrete nozzle 24 to minimize the amount of concrete material rebounding and falling off.

[0046] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

[0048] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A concrete spraying device for tunnel construction, characterized in that: The concrete pressurizing assembly (1) comprises a concrete hopper (3), a pressure-boosting pump assembly (4), a driving assembly (5) and a pressure-stabilizing device (6); the pressure-stabilizing device (6) is fixed to the work vehicle (2); the pressure-boosting pump assembly (4) is arranged on the pressure-stabilizing device (6); the concrete hopper (3) is arranged on the top of the pressure-boosting pump assembly (4); and the driving assembly (5) is arranged on the side wall of the concrete hopper (3); The concrete hopper (3) is provided with an arc-shaped groove (31) and an auger groove (32) at the bottom, a material distribution net (33) is provided above the interior of the concrete hopper (3), an auger (34) is provided in the auger groove (32), an auger drive wheel (341) is provided at the end of the auger (34), and the auger drive wheel (341) is located outside the concrete hopper (3), and discharge pipes (35) are provided at both ends of the bottom of the arc-shaped groove (31), and a one-way valve is provided in the discharge pipe (35); The booster pump assembly (4) comprises a booster pump tank (41) and a piston assembly (42). The piston assembly (42) is arranged in the booster pump tank (41). The booster pump tank (41) is arranged at the bottom of a feed pipe (35). The two feed pipes (35) are respectively located at the two ends of the top of the booster pump tank (41). A piston rod slide groove (411) is provided at the center of the tank wall on the rear side of the booster pump tank (41). The piston assembly (42) is provided with two piston plates, which slide on the booster pump tank (41). 1), two piston plates are respectively provided with a right piston rod (421) and a left piston rod (422), a piston spring (423) is provided between the two piston plates, the right piston rod (421) and the left piston rod (422) slide on the piston rod slide groove (411), the right piston rod (421) is arranged on the upper side of the left piston rod (422), the outer side of the right piston rod (421) is provided with a right rod groove (4211), and the inner side of the left piston rod (422) is provided with a left rod groove (4221); The driving assembly (5) comprises a driving motor (51) and a gear transmission member (53); the driving motor (51) is fixed on the side wall of the concrete hopper (3); a motor shaft (52) is provided at the bottom of the driving motor (51); a motor bevel gear (521) is provided on the motor shaft (52); a flywheel (522) is provided at the bottom of the motor shaft (52); a push rod (523) is provided at the bottom edge of the flywheel (522); the flywheel (522) is arranged above the right piston rod (421); when the flywheel (522) rotates, the push rod (523) is periodically and alternately located in the right rod groove (4211) or the left rod groove (4221).

2. A concrete spraying device for tunnel construction according to claim 1, characterized in that: The gear transmission member (53) rotates at the bottom of the auger groove (32); a main transmission wheel (532) is provided at the front end of the gear transmission member (53); a transmission bevel gear (531) is provided on the main transmission wheel (532); the main transmission wheel (532) is connected to the auger transmission wheel (341) via a transmission belt; and the transmission bevel gear (531) is meshedly connected to the motor bevel gear (521).

3. A concrete spraying device for tunnel construction according to claim 2, characterized in that: The pressure stabilizing device (6) comprises a pressure stabilizing tank (61) and a pressure transformer cylinder (62). Feed pipes (611) are provided at both ends of the front side of the pressure stabilizing tank (61). The feed pipes (611) are respectively connected to both ends of the bottom of the booster pump tank (41). The pressure transformer cylinder (62) is arranged at the top of the rear side of the pressure stabilizing tank (61). A booster discharge pipe (612) is provided at the bottom of the pressure stabilizing tank (61).

4. A concrete spraying device for tunnel construction according to claim 3, characterized in that: A shaft sleeve sliding cylinder (621) is provided at the top of the transformer cylinder (62), and a scale groove (622) is provided on the shaft sleeve sliding cylinder (621). A voltage stabilizing plate (63) is provided inside the transformer cylinder (62), and a voltage stabilizing plate spring (632) is provided at the top of the voltage stabilizing plate (63). The end of the voltage stabilizing plate spring (632) is provided on the top wall of the transformer cylinder (62), and the voltage stabilizing plate (63) is slidably arranged inside the transformer cylinder (62).

5. A concrete spraying device for tunnel construction according to claim 4, characterized in that: The voltage stabilizing plate (63) is also provided with a voltage stabilizing plate threaded sleeve (631), the voltage stabilizing plate threaded sleeve (631) is located at the center of the voltage stabilizing plate spring (632), the voltage stabilizing plate threaded sleeve (631) is slidably arranged in a sleeve sliding cylinder (621), a regulating valve (64) is provided on the sleeve sliding cylinder (621), a threaded rod (641) is provided at the bottom of the regulating valve (64), and the threaded rod (641) is threadedly connected to the voltage stabilizing plate threaded sleeve (631).

6. A concrete spraying device for tunnel construction according to claim 5, characterized in that: The front side of the working vehicle (2) is provided with a control room (21) and a spray control arm (22); the spray control arm (22) is located on the left side of the control room (21); a concrete spray hose (23) is provided on the spray control arm (22); a concrete nozzle (24) is provided at the front end of the spray control arm (22); one end of the concrete spray hose (23) is connected to the pressurized discharge pipe (612); and the other end of the concrete spray hose (23) is connected to the concrete nozzle (24).

Images