A tunnel primary support concrete spraying device

Abstract

The application provides a tunnel primary support concrete spraying device and relates to the technical field of tunnel support construction. The device comprises a guiding support mechanism, a movable driving mechanism, a concrete spraying mechanism and a splicing detection mechanism. The movable driving mechanism is installed on the guiding support mechanism. The concrete spraying mechanism comprises two groups, and the two groups of the concrete spraying mechanism are installed on the movable driving mechanism. The splicing detection mechanism is installed on the right concrete spraying mechanism, and is used for detecting the splicing condition of the guiding support mechanism. The application plays a guiding role on the movable driving seat, so that the movable driving seat can always move on the same straight line, and the height and angle changes of the two rows of concrete spraying heads are avoided. The application solves the problem that the height and angle of the spraying head are easily changed when the tunnel is uneven, and the concrete spraying precision is affected when the concrete spraying device is moved by a track drive.

Description

Technical Field

[0001] This invention belongs to the field of tunnel support construction technology, and more specifically, relates to a tunnel initial support concrete spraying device. Background Technology

[0002] Shotcrete application during the initial support stage of a tunnel is a key measure to ensure construction safety and structural stability. The initial support aims to quickly seal the surrounding rock and prevent loosening and deformation. Shotcrete can promptly fill rock fissures, forming a robust protective layer and preventing collapse caused by exposed surrounding rock. It has a fast construction speed, adapts to complex terrain, and can closely adhere to the rock surface, reducing voids and enhancing overall integrity. In addition, shotcrete has early strength, effectively withstanding stress changes after excavation, providing reliable support for subsequent lining, thereby ensuring the long-term stability of the tunnel and reducing construction risks.

[0003] The current concrete spraying equipment still has the following problems: 1. The concrete spraying equipment is generally driven by tracks. When the tunnel is uneven, the height and angle of the nozzle are prone to change, which affects the accuracy of concrete spraying; 2. It cannot achieve secondary spraying of concrete after a certain interval. When the existing concrete spraying equipment sprays too much at one time, the sprayed concrete is prone to fall off. When the existing concrete spraying equipment sprays too little at one time, it cannot meet the strength requirements. Summary of the Invention

[0004] This disclosure relates to a tunnel initial support concrete spraying device, which includes a guiding support mechanism, a movable drive mechanism, a concrete spraying mechanism, and a splicing detection mechanism. The movable drive mechanism guides the movable drive seat, ensuring it always moves in a straight line, thus preventing changes in height and angle between the two rows of concrete spraying heads. When the concrete spraying device is in use, workers can pull the U-shaped movable frame outwards, increasing the distance between the two rows of concrete spraying heads, allowing for secondary spraying after a certain interval, preventing excessive concrete from falling off during a single spray. This solves the problems of easily changing nozzle height and angle and the inability to achieve secondary concrete spraying after a certain interval.

[0005] This invention provides a tunnel initial support concrete spraying device, comprising: a guide support mechanism, a movable drive mechanism, a concrete spraying mechanism, and a splicing detection mechanism; the guide support mechanism includes: a splicing guide frame and an annular support frame; two annular support frames are provided, and the two annular support frames are threadedly connected to the splicing guide frame; the movable drive mechanism is installed on the guide support mechanism; the movable drive mechanism includes: a movable drive seat; the movable drive seat is slidably installed on the splicing guide frame, and two limiting grooves are provided on the front side of the movable drive seat; two sets of concrete spraying mechanisms are provided, and the two sets of concrete spraying mechanisms are installed on the movable drive mechanism, each concrete spraying mechanism including: a U-shaped movable frame and a connecting limiting pin b; the U-shaped movable frame is slidably installed on the movable drive seat, and two limiting circular holes are provided on the U-shaped movable frame; the connecting limiting pin b is slidably installed in the outer limiting circular hole and limiting groove; the splicing detection mechanism is installed on the right side of the concrete spraying mechanism, and the splicing detection mechanism is used to detect the splicing status of the guide support mechanism; a control panel is installed on the front side of the movable drive mechanism, and the control panel is used to control the movable drive mechanism and the two sets of concrete spraying mechanisms.

[0006] In at least some embodiments, the guiding support mechanism further includes: a connecting positioning plate and a connecting limiting pin a; a connecting positioning groove is provided on the right side of the splicing guide frame; the connecting positioning plate is fixedly installed on the left side of the splicing guide frame, and the connecting positioning plate and the connecting positioning groove are the same size; the connecting limiting pin a is slidably installed on the right end of the splicing guide frame.

[0007] In at least some embodiments, the guide support mechanism further includes: a drive rack; a ring of steel nail mounting holes is provided on each of the two annular support frames; there are two drive racks in total, and the two drive racks are fixedly installed on the top of the splicing guide frame.

[0008] In at least some embodiments, the movable drive mechanism further includes: a concrete storage box and a mounting frame; the concrete storage box is fixedly mounted on the top of the movable drive base; and the mounting frame is fixedly mounted on the bottom of the movable drive base.

[0009] In at least some embodiments, the active drive mechanism further includes: a drive motor and drive gears; the drive motor is fixedly mounted on the mounting frame and electrically connected to the control panel; there are two drive gears, which are fixedly mounted on the output shaft of the drive motor and mesh with two drive racks.

[0010] In at least some embodiments, the concrete spraying mechanism further includes a Y-shaped mounting bracket; the Y-shaped mounting bracket is fixedly mounted on the top of the U-shaped movable frame.

[0011] In at least some embodiments, the concrete spraying mechanism further includes: an arc-shaped spraying pipe and concrete spraying heads; the arc-shaped spraying pipe is fixedly installed on the top of the Y-shaped mounting bracket; the concrete spraying heads are arranged in a row, and the row of concrete spraying heads is fixedly installed on the outer wall of the arc-shaped spraying pipe.

[0012] In at least some embodiments, the concrete spraying mechanism further includes: a concrete pump, a concrete suction pipe, and a Y-shaped hose; the concrete pump is fixedly installed on the top of the movable drive seat and is electrically connected to the control panel; the inner end of the concrete suction pipe is inserted into the concrete storage box, and the outer end of the concrete suction pipe is fixedly installed on the concrete pump; the bottom end of the Y-shaped hose is fixedly installed on the concrete pump, and the top end of the Y-shaped hose is fixedly installed on the arc-shaped spraying pipe.

[0013] In at least some embodiments, the splicing detection mechanism includes: a movable detection frame, detection rollers, and positioning rings; the movable detection frame is slidably mounted on a U-shaped movable frame; the detection rollers are rotatably mounted on the bottom end of the movable detection frame, and the outer wall of the detection rollers contacts the splicing guide frame; the positioning rings are fixedly mounted on the top end of the movable detection frame.

[0014] In at least some embodiments, the splicing detection mechanism further includes: a circular mounting plate and a control switch; the circular mounting plate is fixedly mounted on the movable detection frame, and the top of the circular mounting plate contacts the U-shaped movable frame; the control switch is fixedly mounted on the circular mounting plate, and the control switch is electrically connected to the control panel, and the control switch can contact and trigger the U-shaped movable frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The splicing guide frame of this invention guides the movable drive seat, ensuring that it moves in a straight line and preventing changes in height and angle between the two rows of concrete spraying heads. Workers can pre-assemble multiple splicing guide frames, allowing the movable drive seat to move continuously along the direction of the splicing guide frame.

[0017] In addition, it facilitates the support of the splicing guide frame after assembly, making the splicing guide frame more stable after assembly. After the height of the ring support frame is adjusted, the staff can position the adjusted ring support frame with at least two steel nails. When the control panel controls the drive motor to work, the movable drive seat moves automatically under the action of two drive racks and two drive gears.

[0018] 2. When the control panel controls the concrete pump to work, the concrete in the concrete storage tank enters the arc-shaped spray pipe through the concrete suction pipe and Y-shaped hose under the action of the concrete pump; when the control panel controls the concrete pump to work, the concrete in the concrete storage tank can be sprayed out through a row of concrete spray nozzles.

[0019] In addition, when the concrete spraying device is in use, the workers can pull the U-shaped movable frame outward, increasing the distance between the two rows of concrete spraying heads, allowing the concrete to be sprayed a second time after a certain interval, avoiding excessive concrete falling off at one time; when the concrete spraying device is not in use, the workers can return the U-shaped movable frame inward, reducing the distance between the two rows of concrete spraying heads, which is beneficial for turnover and transportation; the setting of the connecting limit pin b plays a positioning role for the adjusted U-shaped movable frame.

[0020] 3. The detection rollers in this invention serve a detection function on the splicing guide frame. When the detection rollers are not separated from the splicing guide frame, the height of the movable detection frame remains unchanged; when the detection rollers are separated from the splicing guide frame, the movable detection frame slides downward under the action of gravity; when the detection rollers are not separated from the splicing guide frame, the control switch is in the pressed state, and the drive motor and two concrete pumps continue to work; when the detection rollers are separated from the splicing guide frame, the control switch is in the unpressed state, and the drive motor and two concrete pumps automatically stop working to prevent the movable drive seat from falling off the splicing guide frame. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0023] In the attached diagram:

[0024] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0025] Figure 2 The present invention is shown. Figure 1 A schematic diagram of the bottom view structure;

[0026] Figure 3 A schematic diagram of the guiding support mechanism of the present invention is shown;

[0027] Figure 4 A schematic diagram of the active drive mechanism of the present invention is shown;

[0028] Figure 5 The present invention is shown. Figure 1 A schematic diagram of the structure from the perspective of the viewpoint;

[0029] Figure 6 A schematic diagram of the concrete spraying mechanism of the present invention is shown;

[0030] Figure 7 The present invention is shown. Figure 2 A magnified schematic diagram of a portion of region A in the middle;

[0031] Figure 8 The present invention is shown. Figure 1 A magnified schematic diagram of a portion of region B in the middle;

[0032] Figure 9 The present invention is shown. Figure 5 A schematic diagram of the cross-sectional structure along the CC direction;

[0033] Figure 10 The present invention is shown. Figure 9 A magnified schematic diagram of the structure of region D in the middle.

[0034] List of reference numerals in the attached diagram:

[0035] 100. Guiding support mechanism; 101. Splicing guide frame; 1011. Connecting positioning groove; 102. Connecting positioning plate; 103. Connecting limit pin a; 104. Annular support frame; 1041. Steel nail mounting hole; 105. Drive rack;

[0036] 200. Movable drive mechanism; 201. Movable drive base; 2011. Limiting groove; 202. Concrete storage box; 203. Mounting frame; 204. Drive motor; 205. Drive gear;

[0037] 300. Concrete spraying mechanism; 301. U-shaped movable frame; 3011. Limiting hole; 302. Connecting limit pin b; 303. Y-shaped mounting bracket; 304. Arc-shaped spraying pipe; 305. Concrete spraying head; 306. Concrete pump; 307. Concrete suction pipe; 308. Y-shaped flexible hose;

[0038] 400. Assembly and testing mechanism; 401. Movable testing frame; 402. Testing rollers; 403. Positioning retainer ring; 404. Circular mounting plate; 405. Control switch; 500. Control panel. Detailed Implementation

[0039] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0040] Example: Please refer to Figures 1 to 10 As shown: This invention provides a tunnel initial support concrete spraying device, including: a guide support mechanism 100, a movable drive mechanism 200, a concrete spraying mechanism 300, and a splicing detection mechanism 400; the movable drive mechanism 200 is installed on the guide support mechanism 100; there are two sets of concrete spraying mechanisms 300, and both sets of concrete spraying mechanisms 300 are installed on the movable drive mechanism 200; the splicing detection mechanism 400 is installed on the right side of the concrete spraying mechanism 300, and the splicing detection mechanism 400 is used to detect the splicing status of the guide support mechanism 100; a control panel 500 is installed on the front side of the movable drive mechanism 200, and the control panel 500 is used to control the movable drive mechanism 200 and the two sets of concrete spraying mechanisms 300.

[0041] In this embodiment of the disclosure, such as Figure 1 , Figure 3 and Figure 4 As shown, the guide support mechanism 100 includes: a splicing guide frame 101 and an annular support frame 104; two annular support frames 104 are provided, and the two annular support frames 104 are threadedly connected to the splicing guide frame 101; the guide support mechanism 100 also includes: a connecting positioning plate 102 and a connecting limiting pin a103; a connecting positioning groove 1011 is provided on the right side of the splicing guide frame 101; the connecting positioning plate 102 is fixedly installed on the left side of the splicing guide frame 101, and the connecting positioning plate 102 is the same size as the connecting positioning groove 1011; the connecting limiting pin a103 is slidably installed on the right end of the splicing guide frame 101; the guide support mechanism 100 also includes: a drive rack 105; a ring of steel nail mounting holes 1041 are respectively provided on the two annular support frames 104; two drive racks 105 are provided, and the two drive racks 105 are fixedly installed on the top of the splicing guide frame 101;

[0042] The movable drive mechanism 200 includes: a movable drive base 201; the movable drive base 201 is slidably mounted on the splicing guide frame 101, and two limiting grooves 2011 are provided on the front side of the movable drive base 201; the movable drive mechanism 200 also includes: a concrete storage box 202 and an installation frame 203; the concrete storage box 202 is fixedly mounted on the top of the movable drive base 201; the installation frame 203 is fixedly mounted on the bottom of the movable drive base 201; the movable drive mechanism 200 also includes: a drive motor 204 and drive gears 205; the drive motor 204 is fixedly mounted on the installation frame 203, and the drive motor 204 is electrically connected to the control panel 500; there are two drive gears 205, and the two drive gears 205 are fixedly mounted on the output shaft of the drive motor 204, and the two drive gears 205 are meshed with two drive racks 105;

[0043] Its specific functions are as follows: Since the movable drive seat 201 is slidably installed on the splicing guide frame 101, it guides the movable drive seat 201, so that the movable drive seat 201 can always move in the same straight line, avoiding changes in height and angle of the two rows of concrete spraying heads 305; Since the connecting positioning plate 102 is fixedly installed on the left side of the splicing guide frame 101, and the connecting positioning plate 102 is the same size as the connecting positioning groove 1011, and the connecting limit pin a103 is slidably installed on the right end of the splicing guide frame 101, the workers can pre-assemble multiple splicing guide frames 101, so that the movable drive seat 201 can move continuously along the direction of the splicing guide frame 101;

[0044] Furthermore, since the two annular support frames 104 are threadedly connected to the splicing guide frame 101, it is convenient for the staff to support the splicing guide frame 101 after splicing, making the splicing guide frame 101 more stable after splicing. After the height of the annular support frame 104 is adjusted, the staff can position the adjusted annular support frame 104 with at least two steel nails. Also, since the two drive racks 105 are fixedly installed on the top of the splicing guide frame 101, and the two drive gears 205 are fixedly installed on the output shaft of the drive motor 204, and the two drive gears 205 are meshed with the two drive racks 105, when the control panel 500 controls the drive motor 204 to work, the movable drive seat 201 moves automatically under the action of the two drive racks 105 and the two drive gears 205.

[0045] In this embodiment of the disclosure, such as Figure 1 , Figure 6 and Figure 7As shown, the concrete spraying mechanism 300 includes: a U-shaped movable frame 301 and a connecting limiting pin b302; the U-shaped movable frame 301 is slidably mounted on the movable drive seat 201, and two limiting round holes 3011 are provided on the U-shaped movable frame 301; the connecting limiting pin b302 is slidably mounted in the outer limiting round hole 3011 and the limiting groove 2011; the concrete spraying mechanism 300 also includes: a Y-shaped mounting frame 303; the Y-shaped mounting frame 303 is fixedly mounted on the top of the U-shaped movable frame 301; the concrete spraying mechanism 300 also includes: an arc-shaped spray pipe 304 and a concrete spraying head 305; the arc-shaped spray pipe 304 is fixedly mounted on the top of the Y-shaped mounting frame 303; the concrete spraying... The concrete spraying head 305 is arranged in a row, and the row of concrete spraying heads 305 is fixedly installed on the outer wall of the arc-shaped spraying pipe 304; the concrete spraying mechanism 300 also includes: a concrete pump 306, a concrete suction pipe 307, and a Y-shaped hose 308; the concrete pump 306 is fixedly installed on the top of the movable drive seat 201, and the concrete pump 306 is electrically connected to the control panel 500; the inner end of the concrete suction pipe 307 is inserted into the concrete storage box 202, and the outer end of the concrete suction pipe 307 is fixedly installed on the concrete pump 306; the bottom end of the Y-shaped hose 308 is fixedly installed on the concrete pump 306, and the top end of the Y-shaped hose 308 is fixedly installed on the arc-shaped spraying pipe 304;

[0046] Its specific function is as follows: Since the outer end of the concrete suction pipe 307 is fixedly installed on the concrete pump 306, and the bottom end of the Y-type hose 308 is fixedly installed on the concrete pump 306, and the top end of the Y-type hose 308 is fixedly installed on the arc-shaped spray pipe 304, when the control panel 500 controls the concrete pump 306 to work, the concrete in the concrete storage tank 202 enters the arc-shaped spray pipe 304 through the concrete suction pipe 307 and the Y-type hose 308 under the action of the concrete pump 306; and since a row of concrete spraying heads 305 is fixedly installed on the outer wall of the arc-shaped spray pipe 304, when the control panel 500 controls the concrete pump 306 to work, the concrete in the concrete storage tank 202 can be sprayed out through the row of concrete spraying heads 305.

[0047] Furthermore, because the U-shaped movable frame 301 is slidably mounted on the movable drive seat 201, when the concrete spraying device is in use, the operator can pull the U-shaped movable frame 301 outward, increasing the distance between the two rows of concrete spraying heads 305, allowing the concrete to be sprayed a second time after a certain interval, avoiding excessive concrete falling off at one time; when the concrete spraying device is not in use, the operator can reset the U-shaped movable frame 301 inward, reducing the distance between the two rows of concrete spraying heads 305, which is beneficial for turnover and transportation; and because the movable drive seat 201 has two limiting grooves 2011 on the front side, and the connecting limiting pin b302 is slidably mounted in the limiting round hole 3011 and the limiting groove 2011 on the outer / inner side, it plays a positioning role for the adjusted U-shaped movable frame 301.

[0048] In this embodiment of the disclosure, such as Figure 8 and Figure 10 As shown, the splicing detection mechanism 400 includes: a movable detection frame 401, a detection roller 402, and a positioning retainer 403; the movable detection frame 401 is slidably mounted on a U-shaped movable frame 301; the detection roller 402 is rotatably mounted on the bottom end of the movable detection frame 401, and the outer wall of the detection roller 402 contacts the splicing guide frame 101; the positioning retainer 403 is fixedly mounted on the top end of the movable detection frame 401; the splicing detection mechanism 400 also includes: a circular mounting plate 404 and a control switch 405; the circular mounting plate 404 is fixedly mounted on the movable detection frame 401, and the top of the circular mounting plate 404 contacts the U-shaped movable frame 301; the control switch 405 is fixedly mounted on the circular mounting plate 404, and the control switch 405 is electrically connected to the control panel 500, and the control switch 405 can contact and trigger the U-shaped movable frame 301;

[0049] Its specific function is as follows: The movable testing frame 401 is slidably mounted on the U-shaped movable frame 301, and the testing roller 402 is rotatably mounted on the bottom end of the movable testing frame 401. The outer wall of the testing roller 402 contacts the splicing guide frame 101, thus performing a testing function on the splicing guide frame 101. When the testing roller 402 is not separated from the splicing guide frame 101, the height of the movable testing frame 401 remains unchanged; when the testing roller 402 is separated from the splicing guide frame 101, the movable testing frame 401 slides downwards under the action of gravity. Furthermore, the circular mounting plate 404 is fixedly mounted on the movable testing frame. On 401, and control switch 405 is fixedly installed on circular mounting plate 404, and control switch 405 can contact and trigger U-shaped movable frame 301. When the detection roller 402 is not separated from the splicing guide frame 101, control switch 405 is in the pressed state, and drive motor 204 and two concrete pumps 306 continue to work; when the detection roller 402 is separated from splicing guide frame 101, control switch 405 is in the unpressed state, drive motor 204 and two concrete pumps 306 automatically stop working to prevent movable drive seat 201 from falling off splicing guide frame 101.

[0050] The specific usage and function of this embodiment are as follows:

[0051] In use, this invention first involves assembling multiple sets of guide support mechanisms 100. During assembly, adjacent assembly guide frames 101 are connected via connecting positioning plates 102 and connecting limit pins a103. After the adjacent assembly guide frames 101 are assembled, the height of the two annular support frames 104 is adjusted appropriately. The two annular support frames 104, positioned and adjusted via steel nails and corresponding steel nail mounting holes 1041, guide the movable drive seat 201, ensuring that the movable drive seat 201 always moves in a straight line, preventing changes in height and angle of the two rows of concrete spraying heads 305. Then, the two connecting limit pins b302 are pulled out, and the two U-shaped movable frames 301 are pulled outward. The connecting limit pin b302 is slidably installed in the two limit holes 3011 and two limit grooves 2011 on the inner side, increasing the spacing between the two rows of concrete spraying heads 305, allowing the concrete to be sprayed a second time after a certain interval, avoiding excessive concrete falling off at one time. Then, the concrete to be sprayed is poured into the concrete storage box 202, and the control panel 500 is connected to an external power source. The drive motor 204 and two concrete pumps 306 are started through the control panel 500. When the control panel 500 controls the drive motor 204 to work, the movable drive seat 201 moves automatically under the action of the two drive racks 105 and two drive gears 205. When the control panel 500 controls the concrete pumps... During operation, concrete in the concrete storage tank 202, driven by the concrete pump 306, enters the arc-shaped spray pipe 304 through the concrete suction pipe 307 and Y-shaped hose 308, allowing the concrete in the storage tank 202 to be sprayed out through a row of concrete spray nozzles 305. After the movable drive seat 201 moves, the workers disassemble the used splicing guide frame 101 and then reassemble it, allowing multiple splicing guide frames 101 to be recycled until all concrete is sprayed. The detection roller 402 acts as a detector for the splicing guide frame 101. When the detection roller 402 is not separated from the splicing guide frame 101, the height of the movable detection frame 401 remains unchanged. When the detection roller 402 separates from the splicing guide frame 101, the movable detection frame 401 slides downward under the action of gravity. When the detection roller 402 is not separated from the splicing guide frame 101, the control switch 405 is in the pressed state, and the drive motor 204 and the two concrete pumps 306 continue to work. When the detection roller 402 separates from the splicing guide frame 101, the control switch 405 is in the unpressed state, and the drive motor 204 and the two concrete pumps 306 automatically stop working to prevent the movable drive seat 201 from falling off the splicing guide frame 101. When the concrete spraying device is not in use, the workers can reset the two U-shaped movable frames 301 inward, reducing the distance between the two rows of concrete spraying heads 305, which is beneficial for turnover and transportation.

[0052] The following points should be noted in this article:

[0053] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0054] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0055] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A tunnel initial support concrete spraying device, comprising: The system comprises a guide support mechanism (100), a movable drive mechanism (200), a concrete spraying mechanism (300), and a splicing detection mechanism (400); characterized in that the guide support mechanism (100) includes: a splicing guide frame (101) and an annular support frame (104); two annular support frames (104) are provided, and the two annular support frames (104) are threadedly connected to the splicing guide frame (101); the movable drive mechanism (200) is installed on the guide support mechanism (100); the movable drive mechanism (200) includes: a movable drive seat (201); the movable drive seat (201) is slidably installed on the splicing guide frame (101), and two limiting grooves (2011) are provided on the front side of the movable drive seat (201); two sets of concrete spraying mechanisms (300) are provided, and the two sets of concrete spraying mechanisms (300) are installed... On the movable drive mechanism (200), the concrete spraying mechanism (300) includes: a U-shaped movable frame (301) and a connecting limiting pin b (302); the U-shaped movable frame (301) is slidably installed on the movable drive seat (201), and two limiting round holes (3011) are opened on the U-shaped movable frame (301); the connecting limiting pin b (302) is slidably installed in the outer limiting round hole (3011) and limiting groove (2011); the splicing detection mechanism (400) is installed on the right side of the concrete spraying mechanism (300), and the splicing detection mechanism (400) is used to detect the splicing status of the guide support mechanism (100); a control panel (500) is installed on the front side of the movable drive mechanism (200), and the control panel (500) is used to control the movable drive mechanism (200) and the two sets of concrete spraying mechanisms (300). The guide support mechanism (100) further includes: a connecting positioning plate (102) and a connecting limiting pin a (103); a connecting positioning groove (1011) is provided on the right side of the splicing guide frame (101); the connecting positioning plate (102) is fixedly installed on the left side of the splicing guide frame (101), and the connecting positioning plate (102) and the connecting positioning groove (1011) are the same size; the connecting limiting pin a (103) is slidably installed on the right end of the splicing guide frame (101); the guide support mechanism (100) further includes: a drive rack (105); a ring of steel nail mounting holes (1041) are respectively provided on the two ring support frames (104); there are two drive racks (105), and the two drive racks (105) are fixedly installed on the top of the splicing guide frame (101); The movable drive mechanism (200) further includes: a concrete storage box (202) and an installation frame (203); the concrete storage box (202) is fixedly installed on the top of the movable drive base (201); the installation frame (203) is fixedly installed on the bottom of the movable drive base (201); the movable drive mechanism (200) further includes: a drive motor (204) and a drive gear (205); the drive motor (204) is fixedly installed on the installation frame (203), and the drive motor (204) is electrically connected to the control panel (500); there are two drive gears (205), and the two drive gears (205) are fixedly installed on the output shaft of the drive motor (204), and the two drive gears (205) are meshed with two drive racks (105).

2. The tunnel initial support concrete spraying device according to claim 1, characterized in that, The concrete spraying mechanism (300) further includes a Y-shaped mounting bracket (303); the Y-shaped mounting bracket (303) is fixedly installed on the top of the U-shaped movable frame (301).

3. The tunnel initial support concrete spraying device according to claim 2, characterized in that, The concrete spraying mechanism (300) further includes: an arc-shaped spraying pipe (304) and a concrete spraying head (305); the arc-shaped spraying pipe (304) is fixedly installed on the top of the Y-shaped mounting bracket (303); the concrete spraying head (305) is provided in a row, and the row of concrete spraying heads (305) is fixedly installed on the outer wall of the arc-shaped spraying pipe (304).

4. The tunnel initial support concrete spraying device according to claim 3, characterized in that, The concrete spraying mechanism (300) further includes: a concrete pump (306), a concrete suction pipe (307), and a Y-shaped hose (308); the concrete pump (306) is fixedly installed on the top of the movable drive seat (201), and the concrete pump (306) is electrically connected to the control panel (500); the inner end of the concrete suction pipe (307) is inserted into the concrete storage box (202), and the outer end of the concrete suction pipe (307) is fixedly installed on the concrete pump (306); the bottom end of the Y-shaped hose (308) is fixedly installed on the concrete pump (306), and the top end of the Y-shaped hose (308) is fixedly installed on the arc-shaped spraying pipe (304).

5. A tunnel initial support concrete spraying device according to claim 1, characterized in that, The splicing inspection mechanism (400) includes: a movable inspection frame (401), an inspection roller (402), and a positioning ring (403); the movable inspection frame (401) is slidably mounted on a U-shaped movable frame (301); the inspection roller (402) is rotatably mounted on the bottom end of the movable inspection frame (401), and the outer wall of the inspection roller (402) is in contact with the splicing guide frame (101); the positioning ring (403) is fixedly mounted on the top end of the movable inspection frame (401).

6. A tunnel initial support concrete spraying device according to claim 5, characterized in that, The splicing detection mechanism (400) further includes: a circular mounting plate (404) and a control switch (405); the circular mounting plate (404) is fixedly mounted on the movable detection frame (401), and the top of the circular mounting plate (404) is in contact with the U-shaped movable frame (301); the control switch (405) is fixedly mounted on the circular mounting plate (404), and the control switch (405) is electrically connected to the control panel (500), and the control switch (405) can contact and trigger the U-shaped movable frame (301).

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