Guniting device for tunnel construction

Abstract

The invention belongs to the technical field of tunnel construction machinery, and particularly relates to a guniting device for tunnel construction, which comprises a transportation and sorting integrated mechanism, a carrying platform, a magnetic suction type conveying mechanism, a mechanical arm, a guniting device and an air pump. Large-size stone is intercepted through the blocking plate, settled into the sorting pipeline through the gravity of the stone and pushed out of the sorting pipeline in time through the pushing sleeve shell and the outer pushing plate, the technical effect that the large-size stone is sorted in time is achieved, extra cost generated due to pipeline cleaning or replacement is reduced, and the service life of equipment is prolonged; the overall construction benefit is improved; the magnetic suction type conveying mechanism is arranged, a non-contact type and magnetic suction pumping mode is adopted, a permanent magnet attracts an attraction sliding block and extrudes a power spring to change the pressure in a conveying pump cabin, and therefore slurry is pumped, leakage-free slurry pumping is achieved, and the leakage problem caused by abrasion of a sealing piece of a traditional pump is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction machinery, and specifically refers to a grouting device for tunnel construction. Background Art

[0002] Tunnel construction projects use various technical means to dig caves underground or in mountains to form structures for vehicles, personnel and pipelines to pass through. The process involves geological surveys, design planning, excavation, support, drainage and ventilation. According to geological conditions and engineering requirements, construction methods mainly include drilling and blasting, shield tunneling and the New Austrian Tunneling Method. The drilling and blasting method is suitable for hard rocks and is excavated by blasting; the shield tunneling method is suitable for soft soil layers and uses shield machines for mechanized construction; the New Austrian Tunneling Method combines drilling and blasting with support and is suitable for broken rock layers. Tunnel engineering has high technical requirements and involves multidisciplinary knowledge such as mechanics, geology, and machinery. It is an important part of modern transportation and infrastructure construction.

[0003] In tunnel construction projects, after the excavation of the tunnel body is completed, it is necessary to promptly spray concrete for initial support of the tunnel, which is usually poured by a concrete trolley. However, in existing shotcrete equipment, the mud is mixed with large stones, which will cause blockage inside the pipeline during the pumping process. In addition, when pumping, the mud is easy to leak between the transmission structure of the traditional mud pump, causing the equipment to rust and wear. In addition, the existing nozzle has a too small spray range during the spraying process. Although increasing the distance between the nozzle and the working area can increase the spraying area, this will lead to insufficient bonding strength between the shotcrete and the tunnel surrounding rock, and the shotcrete layer will fall off or fail. If the spraying distance is too close, the rebound rate of the shotcrete material is too high, which will cause material waste. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a shotcrete device for tunnel construction, which is provided with an integrated transport and sorting mechanism, which intercepts large-volume stones through a blocking plate, and utilizes the stone's own gravity to settle into the sorting pipeline, and utilizes a pushing shell and an outer pushing plate to timely push the stone out of the sorting pipeline, so as to achieve the technical effect of timely sorting of large-volume stones, reduce the additional cost caused by pipeline cleaning or replacement, thereby saving construction budget, preventing blockage and improving construction quality, ensuring uniform and continuous shotcrete spraying, avoiding problems such as uneven shotcrete spraying or hollowing caused by pipeline obstruction, and also extending the service life of the equipment, reducing equipment wear and failure rate, reducing the frequency of maintenance and replacement, and further improving the overall construction efficiency; in order to solve the problems that the pumping structure of the existing shotcrete equipment is prone to leakage and the sealing cost is high, a magnetic suction transport device is provided. The delivery mechanism adopts a contactless, magnetic suction pumping method. The suction arm drives the magnetic suction device to rotate on the valve pump, and uses a permanent magnet to attract the adsorption slider, squeeze the power spring, and pump the mud by changing the pressure in the delivery pump cabin, so as to achieve leakage-free pumping of mud, solve the leakage problem caused by seal wear of traditional pumps, reduce maintenance costs and downtime, and further reduce operating costs; in order to improve the spraying efficiency and spraying coverage rate, a spraying device is set, which can adjust the air pressure in the input injection cabin and adjust the spraying pressure at the same time. Through the spiral nozzle of the self-spinning nozzle, the reaction force generated by the spraying is used to rotate the self-spinning nozzle, which can evenly distribute the slurry on the target surface, ensure uniform coverage, avoid local excessive thickness or thinness, solve the problems of uneven coverage and sagging that are prone to occur in traditional spraying, and improve the construction quality.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a shotcreting device for tunnel construction, including a transport and sorting integrated mechanism, a carrying platform, a magnetic suction conveying mechanism, a mechanical arm, a shotcreting device and an air pump, wherein the carrying platform is installed on a transport vehicle, the transport and sorting integrated mechanism is arranged above the carrying platform, the magnetic suction conveying mechanism is arranged above the carrying platform, the mechanical arm is rotatably arranged above the carrying platform, the shotcreting device is arranged above the carrying platform, the air pump is arranged above the carrying platform, the shotcreting device is rotatably arranged on the mechanical arm, and the transport and sorting integrated mechanism is connected to the magnetic suction conveying mechanism.

[0006] Among them, the integrated transport and sorting mechanism includes a hopper, a pushing pipe, a sorting pipe, a conveying auger and a conveying motor. The hopper is arranged above the carrying platform, the pushing pipe is arranged at the bottom of the hopper, the sorting pipe is connected with the pushing pipe, the conveying auger is rotatably arranged in the pushing pipe, the conveying motor is arranged on the side wall of the pushing pipe, the conveying auger is transmission-connected to the output end of the conveying motor, and the conveying auger is used to transport the mud in the hopper.

[0007] Furthermore, a pushing sleeve is slidably provided in the sorting pipe, a sorting hydraulic arm is provided between the inner wall of the pushing sleeve and the sorting pipe, an outer pushing plate is connected to the end of the pushing sleeve, and by retracting the sorting hydraulic arm, large-volume stones between the sorting hydraulic arm and the outer pushing plate can be pushed out of the sorting pipe.

[0008] As a further preferred embodiment of the present invention, a blocking plate is provided at the outlet above the pushing pipe, and the blocking plate is used to intercept large-volume stones in the pushing pipe. The size of the intercepted stones can be changed by replacing the blocking plate.

[0009] Furthermore, the magnetic suction conveying mechanism includes a magnetic suction pumping device, a pumping drive system and a pumping base, the pumping drive system is arranged above the carrying platform, the pumping base is arranged above the carrying platform, and the magnetic suction pumping device is arranged above the pumping base.

[0010] Among them, the magnetic suction pump pressure device includes a self-priming channel, a valve pump, an annular channel and a magnetic suction drive system. The self-priming channel is connected to the pushing pipe, and the self-priming channel is also fixed to the pump pressure base. The valve pump is connected to the self-priming channel, and the annular channel is connected to the valve pump. The magnetic suction drive system is arranged above the self-priming channel.

[0011] Furthermore, the magnetic drive system includes a follower pulley, a sealed top shell, a suction arm, a magnetic device, a rotating base and a rotating limit shaft, the rotating base is arranged above the self-priming channel, the rotating limit shaft is arranged on the rotating base, the suction arm is transmission-connected to the top end of the rotating limit shaft, the magnetic device is arranged at the outer end of the suction arm, the sealed top shell is arranged above the rotating base, and the follower pulley is arranged at the top end of the suction arm.

[0012] Among them, the magnetic attraction device includes a magnetic attraction base and a permanent magnet. The magnetic attraction base is fixedly connected to the suction arm. The permanent magnet is arranged on the magnetic attraction base. Auxiliary wheels are rotatably connected on both sides of the bottom of the magnetic attraction base. The permanent magnet is selected to use a neodymium magnet to ensure that sufficient suction is provided.

[0013] Furthermore, the pump pressure drive system includes a suction motor, a suction base, a suction shaft and a driving pulley, the suction base is arranged above the carrying platform, the suction motor is arranged in the middle of the suction base, the suction shaft is arranged on the suction base, the driving pulley is arranged on the suction shaft, and the suction shaft is transmission-connected to the output end of the suction motor.

[0014] Furthermore, the driving pulley and the driven pulley are connected via a belt transmission.

[0015] As a further preferred embodiment of the present invention, the valve pump includes a conveying pump cabin, an adsorption slider, an inlet slider and an outlet slider, the conveying pump cabin is connected to the self-priming channel, the adsorption slider is slidably arranged at the upper part of the conveying pump cabin, a power spring is provided between the top of the inner cavity of the conveying pump cabin and the inlet adsorption slider, the inlet slider is slidably arranged at the middle part of the conveying pump cabin, an inlet spring is provided between the inlet slider and the side wall of the inner cavity of the conveying pump cabin, the outlet slider is slidably arranged at the lower part of the conveying pump cabin, and an outlet spring is provided between the outlet slider and the bottom of the inner cavity of the conveying pump cabin. When the suction arm rotates, the rotation trajectory of the permanent magnet passes over the adsorption slider, and the permanent magnet attracts the adsorption slider and squeezes the power spring to suck in the mud from the self-priming channel. After the permanent magnet leaves the top of the permanent magnet, the elastic force generated by the recovery of the power spring is used to squeeze the mud into the annular channel.

[0016] Furthermore, the spraying device includes a spraying cabin, an air supply chamber, a mud port, a spinning nozzle and a connecting shaft. The spraying cabin is rotatably arranged on the mechanical arm, the air supply chamber is through-arranged on the spraying cabin, the mud port is arranged on the side wall of the spraying cabin, the spinning nozzle is rotatably arranged on the spraying cabin, one end of the connecting shaft is fixedly connected to the spinning nozzle, and the other end of the connecting shaft is rotatably connected to the air supply chamber. The spraying channel of the spinning nozzle is spiral, and the reaction force during spraying will drive the spinning nozzle to spin.

[0017] Furthermore, the annular channel is connected to the mud port through a mud channel, and the air pump is connected to the air delivery cavity through an air delivery pipeline.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: The beneficial effects of a tunnel construction spraying device provided by the present solution are as follows: (1) Using the integrated transport and sorting mechanism to timely sort the stones in the mud can reduce the additional costs caused by pipeline cleaning or replacement, thereby saving the construction budget. In addition, the prevention of blockage can also improve the construction quality, ensure uniform and continuous spraying, avoid problems such as uneven spraying or hollowing caused by pipeline blockage, and extend the service life of equipment, reduce equipment wear and failure rate, reduce the frequency of maintenance and replacement, and further improve the overall construction efficiency; (2) The slurry is pumped using a magnetic suction conveying mechanism. The non-contact magnetic suction pumping method is adopted. The magnetic suction device is driven to rotate on the valve pump through the suction arm. The permanent magnet is used to attract the adsorption slider and squeeze the power spring. The slurry is pumped by changing the pressure in the conveying pump cabin. This achieves leakage-free slurry pumping, solves the leakage problem caused by seal wear in traditional pumps, reduces maintenance costs and downtime, and further reduces operating costs. (3) Use a spraying device to spray slurry. Through the spiral nozzle of the spinning nozzle, the reaction force generated by the spraying is used to rotate the spinning nozzle, which can evenly distribute the slurry on the target surface, ensuring uniform coverage and avoiding local excessive thickness or thinness. This solves the problems of uneven coverage and sagging that are prone to occur in traditional spraying, and improves construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a shotcrete device for tunnel construction proposed by the present invention; Figure 2 A structural side view of a shotcrete device for tunnel construction proposed by the present invention; Figure 3 This is a structural front view of a shotcrete device for tunnel construction proposed by the present invention; Figure 4 It is a partial structural cross-sectional view of the transport and sorting integrated mechanism; Figure 5 It is a structural schematic diagram of a magnetic suction conveying mechanism; Figure 6 It is a structural schematic diagram of a magnetic suction pump pressure device; Figure 7 It is a partial structural cross-sectional view of the magnetic suction pump pressure device; Figure 8 This is an exploded diagram of the magnetic drive system; Fig. 9 It is a structural schematic diagram of a magnetic suction device; Fig.10 is a cross-sectional view of a shotcrete device; Fig.11 It is the front view of the pump pressure drive system.

[0020] Among them, 1. transport and sorting integrated mechanism, 2. carrying platform, 3. magnetic suction conveying mechanism, 4. mechanical arm, 5. spraying device, 6. air pump, 101. hopper, 102. pushing pipeline, 103. sorting pipeline, 104. conveying auger, 105. conveying motor, 106. sorting hydraulic arm, 107. outer push plate, 108. push sleeve, 109. blocking plate, 301. magnetic suction pump pressure device, 302. pump pressure drive system, 303. self-priming channel, 304. valve pump, 305. annular channel, 306. magnetic suction drive system, 307. suction motor, 308. suction base, 309. suction shaft, 310 , driving pulley, 311, follower pulley, 312, sealing top shell, 313, suction arm, 314, magnetic device, 315, rotating base, 316, rotating limit shaft, 317, magnetic base, 318, permanent magnet, 319, auxiliary rotor, 320, conveying pump cabin, 321, power spring, 322, adsorption slider, 323, inlet slider, 324, inlet spring, 325, outlet slider, 326, outlet spring, 327, mud channel, 328, pump pressure base, 501, injection cabin, 502, gas delivery cavity, 503, mud port, 504, spinning nozzle, 505, connecting shaft, 601, gas delivery pipeline.

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0024] like Figure 1-Figure 11As shown, the present invention provides a grouting device for tunnel construction, including a transport and sorting integrated mechanism 1, a carrying platform 2, a magnetic suction conveying mechanism 3, a mechanical arm 4, a grouting device 5 and an air pump 6. The carrying platform 2 is installed on a transport vehicle, the transport and sorting integrated mechanism 1 is arranged above the carrying platform 2, the magnetic suction conveying mechanism 3 is arranged above the carrying platform 2, the mechanical arm 4 is rotatably arranged above the carrying platform 2, the grouting device 5 is arranged above the carrying platform 2, the air pump 6 is arranged above the carrying platform 2, the grouting device 5 is rotatably arranged on the mechanical arm 4, and the transport and sorting integrated mechanism 1 is connected to the magnetic suction conveying mechanism 3.

[0025] The integrated transport and sorting mechanism 1 comprises a hopper 101, a pushing pipe 102, a sorting pipe 103, a conveying auger 104 and a conveying motor 105. The hopper 101 is arranged above the carrying platform 2, the pushing pipe 102 is arranged at the bottom of the hopper 101, the sorting pipe 103 is connected with the pushing pipe 102, the conveying auger 104 is rotatably arranged in the pushing pipe 102, the conveying motor 105 is arranged on the side wall of the pushing pipe 102, and the conveying auger 104 is transmission-connected with the output end of the conveying motor 105; a pushing sleeve 108 is slidingly provided in the sorting pipe 103, a sorting hydraulic arm 106 is provided between the inner wall of the pushing sleeve 108 and the sorting pipe 103, an outer pushing plate 107 is connected to the end of the pushing sleeve 108, and a blocking plate 109 is provided at the outlet above the pushing pipe 102.

[0026] The magnetic suction conveying mechanism 3 includes a magnetic suction pump pressure device 301, a pump pressure drive system 302 and a pump pressure base 328. The pump pressure drive system 302 is arranged above the carrier platform 2, and the pump pressure base 328 is arranged above the carrier platform 2. The magnetic suction pump pressure device 301 is arranged above the pump pressure base 328. The magnetic suction pump pressure device 301 includes a self-priming channel 303, a valve pump 304, an annular channel 305 and a magnetic suction drive system 306. The self-priming channel 303 is connected to the pushing pipeline 102, and the self-priming channel 303 is also fixedly connected to the pump pressure base 328. The valve pump 304 is connected to the self-priming channel 303, the annular channel 305 is connected to the valve pump 304, and the magnetic suction drive system 306 The magnetic suction drive system 306 includes a follower pulley 311, a sealing top shell 312, a suction arm 313, a magnetic suction device 314, a rotating base 315 and a rotation limit shaft 316. The rotating base 315 is arranged above the self-priming channel 303, the rotation limit shaft 316 is arranged on the rotating base 315, the suction arm 313 is connected to the top of the rotation limit shaft 316 by transmission, the magnetic suction device 314 is arranged at the outer end of the suction arm 313, the sealing top shell 312 is arranged above the rotating base 315, and the follower pulley 311 is arranged at the top of the suction arm 313; the pump pressure drive system 302 includes a suction motor 307, a suction base 308 , a suction shaft 309 and a driving pulley 310, the suction base 308 is arranged above the carrying platform 2, the suction motor 307 is arranged in the middle of the suction base 308, the suction shaft 309 is arranged on the suction base 308, the driving pulley 310 is arranged on the suction shaft 309, the suction shaft 309 is drivingly connected to the output end of the suction motor 307; the driving pulley 310 is connected to the follower pulley 311 through a belt transmission, the magnetic device 314 includes a magnetic base 317 and a permanent magnet 318, the magnetic base 317 is fixedly connected to the suction arm 313, the permanent magnet 318 is arranged on the magnetic base 317, and the auxiliary wheels 319 are rotatably connected to both sides of the bottom of the magnetic base 317; The valve pump 304 includes a delivery pump cabin 320, an adsorption slider 322, an inlet slider 323 and an outlet slider 325. The delivery pump cabin 320 is connected to the self-priming channel 303. The adsorption slider 322 is slidably arranged at the upper part of the delivery pump cabin 320. A power spring 321 is provided between the top of the inner cavity of the delivery pump cabin 320 and the inlet adsorption slider 322. The inlet slider 323 is slidably arranged at the middle part of the delivery pump cabin 320. An inlet spring 324 is provided between the inlet slider 323 and the side wall of the inner cavity of the delivery pump cabin 320. The outlet slider 325 is slidably arranged at the lower part of the delivery pump cabin 320. An outlet spring 326 is provided between the outlet slider 325 and the bottom of the inner cavity of the delivery pump cabin 320.

[0027] The spraying device 5 includes a spraying cabin 501, an air delivery chamber 502, a mud port 503, a spinning nozzle 504 and a connecting shaft 505. The spraying cabin 501 is rotatably arranged on the mechanical arm 4, the air delivery chamber 502 is through-arranged on the spraying cabin 501, the mud port 503 is arranged on the side wall of the spraying cabin 501, the spinning nozzle 504 is rotatably arranged on the spraying cabin 501, one end of the connecting shaft 505 is fixedly connected to the spinning nozzle 504, and the other end of the connecting shaft 505 is rotatably connected to the air delivery chamber 502; the annular channel 305 is connected to the mud port 503 through the mud channel 327, and the air pump 6 is connected to the air delivery chamber 502 through the air delivery pipeline 601.

[0028] During specific use, the mud is added to the hopper 101 through the mixer, and the conveying motor 105 is started at this time, and the conveying auger 104 is driven by the conveying motor 105 to rotate, and the conveying auger 104 pushes the mud in the push pipe 102 to move, and when the mud is pushed to the bottom of the blocking plate 109, the blocking plate 109 is used to separate the stones with too large volume, and the mud passes through the blocking plate 109 into the magnetic suction conveying mechanism 3, and the sorted stones fall into the sorting pipe 103. During operation, the sorting hydraulic arm 106 is started at a fixed time, and the sorting hydraulic arm 106 is made to perform a contraction action, and the sorting hydraulic arm 106 is extended to push the outer push plate 107 and the push shell 108, and the stones between the outer push plate 107 and the push shell 108 are pushed to the sorting pipe 103. At the lower opening of the sorting pipe 103, the stone falls from the lower opening of the sorting pipe 103, and then the sorting hydraulic arm 106 contracts to drive the outer push plate 107 and the push sleeve 108 to reset; the mud first enters the self-priming channel 303, and the suction motor 307 is started. The suction motor 307 drives the suction shaft 309 to rotate, and the rotation of the suction shaft 309 drives the driving pulley 310 to rotate, and the driving pulley 310 rotates through the belt to drive the follower pulley 311 to rotate, and the follower pulley 311 rotates to drive the suction arm 313 to rotate, and the suction arm 313 rotates to drive the magnetic device 314 to rotate. When the permanent magnet 318 approaches the top of the conveying pump cabin 320, the permanent magnet 318 attracts the adsorption slider 322 and squeezes the power spring 321, and the conveying pump cabin The pressure in 320 decreases, the inlet slider 323 slides and squeezes the inlet spring 324, and the mud is sucked into the delivery pump cabin 320. When the permanent magnet 318 is away from the top of the delivery pump cabin 320, the permanent magnet 318 no longer attracts the adsorption slider 322 and squeezes the power spring 321. The power spring 321 resets and pushes the adsorption slider 322. The pressure in the delivery pump cabin 320 increases, the inlet spring 324 resets and pushes the inlet slider 323. The outlet slider 325 slides and squeezes the outlet spring 326. The mud enters the annular channel 305 from the delivery pump cabin 320, and then enters the spraying device 5 through the mud channel 327 from the annular channel 305; start the air pump 6, and send the high-pressure gas into the spraying device 5 through the gas pipeline 601; the mud passes through the mud The nozzle 503 enters the injection chamber 501, and the high-pressure gas enters the injection chamber 501 through the gas delivery chamber 502. In the injection chamber 501, the high-pressure gas mixed with the mud is ejected through the spinning nozzle 504. Since the spinning nozzle 504 is a spiral nozzle, the reaction force during the injection process will cause the spinning nozzle 504 to spin; the high-pressure gas helps to distribute the slurry more evenly on the target surface, reduce the uneven phenomenon during the injection process, and enhance the adhesion between the slurry and the substrate. At the same time, by accurately controlling the flow rate and pressure of the high-pressure gas, the waste of the slurry can be reduced, ensuring that more slurry is effectively used, and letting the nozzle spin can make the mud spray more evenly, while increasing the spraying area and spraying speed, greatly improving the spraying efficiency;In addition, the position of the spin nozzle 504 can be adjusted by the mechanical arm 4, and the mechanical arm 4 is a conventional technology, so the operation method is not further described. ;

[0029] The above is the specific working process of the present invention, and you can repeat this step next time you use it.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present invention.

[0032] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A grouting device for tunnel construction, characterized in that: The invention comprises a transport and sorting integrated mechanism (1), a transport platform (2), a magnetic suction conveying mechanism (3), a mechanical arm (4), a spraying device (5) and an air pump (6), wherein the transport platform (2) is installed on a transport vehicle, the transport and sorting integrated mechanism (1) is arranged above the transport platform (2), the magnetic suction conveying mechanism (3) is arranged above the transport platform (2), the mechanical arm (4) is rotatably arranged above the transport platform (2), the spraying device (5) is arranged above the transport platform (2), the air pump (6) is arranged above the transport platform (2), the spraying device (5) is rotatably arranged on the mechanical arm (4), and the transport and sorting integrated mechanism (1) is connected to the magnetic suction conveying mechanism (3); the transport and sorting integrated mechanism (1) comprises a hopper (101), a pushing pipe (102), a sorting pipe (103), a conveying auger (104) and a conveying motor (105), the hopper (101) being arranged above the carrying platform (2), the pushing pipe (102) being arranged at the bottom of the hopper (101), the sorting pipe (103) being in communication with the pushing pipe (102), the conveying auger (104) being rotatably arranged in the pushing pipe (102), the conveying motor (105) being arranged on the side wall of the pushing pipe (102), the conveying auger (104) being transmission-connected to the output end of the conveying motor (105); the magnetic suction conveying mechanism (3) comprising a magnetic suction pumping device (301), a pumping drive system (302) and a pumping base (328), the pumping drive system (302) being arranged above the carrying platform (2), the pumping base (328) being arranged above the carrying platform (2), and the magnetic suction pumping device (301) being arranged above the pumping base (328).

2. A tunnel construction spraying device according to claim 1, characterized in that: A pushing sleeve (108) is slidably provided inside the sorting pipe (103), a sorting hydraulic arm (106) is provided between the inner wall of the pushing sleeve (108) and the sorting pipe (103), and an outer pushing plate (107) is connected to the end of the pushing sleeve (108); a blocking plate (109) is provided at the outlet above the pushing pipe (102).

3. A tunnel construction spraying device according to claim 2, characterized in that: The magnetic suction pump pressure device (301) comprises a self-priming channel (303), a valve pump (304), an annular channel (305) and a magnetic suction drive system (306); the self-priming channel (303) is connected to the pushing pipeline (102); the self-priming channel (303) is also fixedly connected to the pump pressure base (328); the valve pump (304) is in communication with the self-priming channel (303); the annular channel (305) is in communication with the valve pump (304); and the magnetic suction drive system (306) is arranged above the self-priming channel (303).

4. A tunnel construction spraying device according to claim 3, characterized in that: The magnetic attraction driving system (306) comprises a follower pulley (311), a sealed top shell (312), a suction arm (313), a magnetic attraction device (314), a rotating base (315) and a rotation limit shaft (316); the rotating base (315) is arranged above the self-priming channel (303); the rotation limit shaft (316) is arranged on the rotating base (315); the suction arm (313) is transmission-connected to the top end of the rotation limit shaft (316); the magnetic attraction device (314) is arranged at the outer end of the suction arm (313); the sealed top shell (312) is arranged above the rotating base (315); and the follower pulley (311) is arranged at the top end of the suction arm (313).

5. A tunnel construction spraying device according to claim 4, characterized in that: The pump pressure drive system (302) comprises a suction motor (307), a suction base (308), a suction shaft (309) and a driving pulley (310); the suction base (308) is arranged above the carrier platform (2); the suction motor (307) is arranged in the middle of the suction base (308); the suction shaft (309) is arranged on the suction base (308); the driving pulley (310) is arranged on the suction shaft (309); and the suction shaft (309) is drivingly connected to the output end of the suction motor (307).

6. A tunnel construction spraying device according to claim 5, characterized in that: The magnetic attraction device (314) comprises a magnetic attraction base (317) and a permanent magnet (318); the magnetic attraction base (317) is fixedly connected to the attraction arm (313); the permanent magnet (318) is arranged on the magnetic attraction base (317); and auxiliary rotating wheels (319) are rotatably connected to both sides of the bottom of the magnetic attraction base (317).

7. A tunnel construction spraying device according to claim 6, characterized in that: The valve pump (304) comprises a delivery pump cabin (320), an adsorption slider (322), an inlet slider (323) and an outlet slider (325); the delivery pump cabin (320) is communicated with the self-priming channel (303); the adsorption slider (322) is slidably arranged at the upper part of the delivery pump cabin (320); a power spring (321) is arranged between the top of the inner cavity of the delivery pump cabin (320) and the inlet slider (322); the inlet slider (323) is slidably arranged at the middle part of the delivery pump cabin (320); an inlet spring (324) is arranged between the inlet slider (323) and the side wall of the inner cavity of the delivery pump cabin (320); the outlet slider (325) is slidably arranged at the lower part of the delivery pump cabin (320); and an outlet spring (326) is arranged between the outlet slider (325) and the bottom of the inner cavity of the delivery pump cabin (320).

8. A tunnel construction spraying device according to claim 7, characterized in that: The spraying device (5) comprises a spraying chamber (501), an air delivery chamber (502), a mud port (503), a self-spinning nozzle (504) and a connecting shaft (505); the spraying chamber (501) is rotatably mounted on the mechanical arm (4); the air delivery chamber (502) is through-mounted on the spraying chamber (501); the mud port (503) is disposed on a side wall of the spraying chamber (501); the self-spinning nozzle (504) is rotatably mounted on the spraying chamber (501); one end of the connecting shaft (505) is fixedly connected to the self-spinning nozzle (504); and the other end of the connecting shaft (505) is rotatably connected to the air delivery chamber (502).

9. A tunnel construction spraying device according to claim 8, characterized in that: The annular channel (305) is connected to the mud port (503) via the mud channel (327), and the air pump (6) is connected to the air delivery cavity (502) via the air delivery pipeline (601).

10. A tunnel construction spraying device according to claim 9, characterized in that: The driving pulley (310) and the driven pulley (311) are connected via a belt transmission.

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