Small-section tunnel continuous shotcrete feeding device

Abstract

The application discloses a small-section tunnel continuous concrete spraying feeding device and belongs to the technical field of tunnel concrete spraying supporting, which comprises a lifting control device, the lower end of the lifting control device is fixedly connected with a wheel type transportation chassis, and the upper end of the lifting control device is slidably connected with both sides of a belt transportation system through a pair of piston rods slidably connected with the upper end of the lifting control device; the foldable large hopper comprises a foldable baffle, the foldable baffle is rotationally connected with the upper end of the foldable large hopper and is located on the side close to the belt transportation system; the lifting control device comprises a pair of control rods, the control rods are respectively fixedly connected with the piston rods, and the control rods are always in contact with one end surface of the foldable baffle along with the lifting of the piston rods; the height can be properly adjusted according to the size of the small-section tunnel, the hopper capacity can be adjusted at the same time, the spraying supporting standby period is effectively shortened, and the construction supporting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel shotcrete support, more particularly to a small-section tunnel continuous shotcrete feeding device. BACKGROUND

[0002] Small-section tunnels have the advantages of less excavation per unit length, less slag output, and convenient safety support, and are widely used in the design of hydraulic tunnels. After tunnel excavation, the rock wall free surface appears, which changes the stress state of the surrounding rock and produces deformation displacement towards the tunnel. In order to effectively constrain and control the deformation of the surrounding rock, enhance the stability of the surrounding rock, and prevent collapse, it is necessary to carry out surrounding rock support and lining. Shotcrete support is widely used in tunnel support, and shotcrete is a kind of concrete formed by using compressed air or other power to transport the mixed concrete mixture with a certain proportion along the pipeline to the nozzle, and then vertically sprayed on the surrounding rock surface at a high speed, relying on the continuous impact of cement and aggregate during the spraying process. In the construction of small-section tunnel support, due to the limited space, large-scale mechanical equipment cannot be used, and the section only meets the transportation of a concrete truck, at this time, the small concrete spraying machine will inevitably stop for material due to the limited storage space, and the concrete spraying construction can continue only after the concrete truck enters again, which wastes a lot of time. The present application designs a small-section tunnel continuous shotcrete feeding device, which effectively shortens the standby period and improves the work efficiency, which is helpful to realize the purpose of rapid tunnel construction and excavation. SUMMARY

[0003] In view of the problems in the prior art, the present application aims to provide a small-section tunnel continuous shotcrete feeding device, which has strong adaptability and flexibility, can adjust the height according to the size of the small-section tunnel, and can adjust the hopper capacity while adjusting the height of the device, which can effectively shorten the standby period of the shotcrete support and improve the construction support efficiency.

[0004] To solve the above problems, the present application adopts the following technical scheme.

[0005] The utility model provides a kind of small section tunnel continuous shotcrete feeding device, including foldable large hopper, pump system, belt conveying system, wheeled transport chassis and lifting control device, foldable large hopper is fixedly connected in the upper end of wheeled transport chassis, close to the front end of wheeled transport chassis, pump system is fixedly connected in the upper end of wheeled transport chassis, and located in the lower end of foldable large hopper, belt conveying system is rotatably connected between the pair of support columns fixedly connected in the upper end of wheeled transport chassis, and one end is located in the upper side of foldable large hopper, the lower end of lifting control device is fixedly connected in the upper end of wheeled transport chassis, and the two sides of lifting control device one end surface are fixedly connected with hopper frame by multiple horizontal connecting rods, lifting control device is located between pump system and inclined support, and the upper end of lifting control device is slidably connected with the two sides of belt conveying system by a pair of piston rods slidably connected in the upper end of lifting control device;Foldable large hopper includes a folding baffle, and the folding baffle is rotatably connected in the upper end of foldable large hopper and located in the side close to belt conveying system;Lifting control device includes a pair of control rods, and the two control rods are fixedly connected in the middle end of two piston rods and located in the upper side of horizontal connecting rod, and the two control rods can be in contact with one end surface of folding baffle with the lifting of piston rod;It can be adjusted according to the size of small section tunnel, and the capacity of hopper can be adjusted while adjusting the height of device, which can effectively shorten the shotcrete support stop waiting period and improve the construction support efficiency.

[0006] Further, the front end and the middle end of the wheeled transport chassis are rotatably connected with a pair of tires, and the rear end of the wheeled transport chassis is provided with a through groove; the feeding device can move more conveniently in the tunnel, and the belt conveying system can rotate to a higher height without hitting the wheeled transport chassis.

[0007] Further, the foldable large hopper further includes a hopper body and a hopper frame, the lower end of the hopper frame is fixedly connected to the upper end of the wheeled transport chassis, and the four end surfaces around the hopper body are welded to the inner side of the upper end of the hopper frame; the foldable large hopper can be more firmly fixed to the upper end of the wheeled transport chassis.

[0008] Further, the pump system includes a spraying machine and a control box, the spraying machine and the control box are electrically connected, and the control box is located on one side of the spraying machine; the spraying machine includes a spraying machine body and an opener, the eccentric end of the opener is rotatably connected to the motor output end in the spraying machine body and located in the lower end of the foldable large hopper; the motor output end can be rotated to drive the opener to rotate and realize continuous and uniform feeding by controlling the control box.

[0009] Further, the belt conveying system comprises a belt conveying device and a foldable blocking groove, the foldable blocking groove is fixedly connected to the upper end of the belt conveying device and away from the side of the foldable large hopper; the foldable blocking groove can be used to pour the sprayed concrete mixture into the foldable blocking groove, so that the discharging is convenient and fast, and the waste of the sprayed concrete mixture is effectively reduced.

[0010] Further, the belt conveying device comprises a feeding belt, a plurality of drag rollers, a driving motor, a belt conveying device frame, a pair of rollers and a transmission belt, the pair of rollers are rotationally connected to the two ends of the belt conveying device frame, the feeding belt is clamped to the outer ends of the pair of rollers and located at the lower side of the foldable blocking groove, the plurality of drag rollers are fixedly connected to the upper end of the belt conveying device frame, the upper end of the drag roller is in contact with the inner end of the feeding belt, and the end of the roller close to the foldable large hopper is connected to the driving motor fixedly connected to the upper end of the belt conveying device frame through the transmission belt; the feeding belt can be supported by the drag rollers to increase the conveying capacity of the feeding belt, so that the sprayed concrete mixture is fed into the foldable large hopper through the belt conveying device.

[0011] Further, the foldable blocking groove comprises a foldable blocking groove body and a rotating blocking plate, the rotating blocking plate is rotationally connected to the upper end of one end of the foldable blocking groove body perpendicular to the conveying direction of the belt conveying device; the rotating blocking plate can cover the concrete mixture to reduce the waste of the concrete mixture.

[0012] Further, the two side ends of the foldable blocking groove adopt the blocking plates inclined to the outer side of the feeding belt; the opening area can be maximized to facilitate fast discharging.

[0013] Further, the two ends of the support column are fixedly connected to two mirror-symmetrical inclined supports, and the upper end of the inclined support is fixedly connected to the upper end of the wheel type conveying chassis; the belt conveying system can stably rotate between the support system composed of the pair of support columns and the inclined supports, so that the height of the feeding device can be adjusted according to the height of the tunnel.

[0014] Further, the two side ends of the belt conveying device frame are provided with a sliding groove, and the upper end of the piston rod is slidingly connected in the sliding groove; the piston rod can stably slide in the sliding groove, the rotation of the belt conveying device frame is controlled through the lifting of the piston rod, so that the height of the feeding device can be adjusted according to the height of the tunnel.

[0015] Compared with the prior art, the advantages of the present application are that:

[0016] (1) The foldable large hopper and the foldable blocking groove of the scheme are foldable, which maximizes the opening area, can realize adjusting the capacity of the concrete mixture, facilitates and speeds up the unloading, can effectively shorten the shotcrete support downtime, improve the construction support efficiency, and the control box can control the rotation of the opener, so that the unloading is uniform, and the waste of concrete material is effectively reduced.

[0017] (2) The scheme can control the rotation of the belt conveying device frame by controlling the lifting of the piston rod through the upgraded control device, and simultaneously control the rotation of the foldable large hopper, so as to realize adjusting the height of the feeding device according to the height of the small-section tunnel, has higher flexibility and adaptability, and replaces the manpower to rotate the belt conveying system and the foldable large hopper, reduces the working strength, and also improves the working efficiency.

[0018] (3) The multiple horizontal connecting rods of the scheme can serve as a ladder, realize helping the staff to go up to check the condition of the device, simultaneously cooperate with the support column and the inclined support to enhance the firmness and stability of the feeding device, and each main body structure is reasonably arranged, and the space is fully utilized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the application;

[0020] Figure 2 It is a schematic diagram of the structure of the foldable large hopper of the application;

[0021] Figure 3 It is a schematic diagram of the structure of the foldable large hopper of the application; Figure 1

[0022] Figure 4 It is a schematic diagram of the structure of the wheel type transport chassis of the application;

[0023] Figure 5 It is a sectional view of the cooperation of the main body of the injection machine and the opener of the application;

[0024] Figure 6 It is a schematic diagram of the structure of the foldable blocking groove of the application;

[0025] Figure 7 It is a state diagram of the foldable blocking plate inclined downward and in contact with the control rod;

[0026] Figure 8 It is a state diagram of the foldable blocking plate in horizontal contact with the control rod;

[0027] Figure 9 It is a state diagram of the foldable blocking plate farthest from the rotation end and closest to the feeding belt;

[0028] Figure 10 ​Figure of the completely closed state of the folding baffle and the hopper body of the present application.

[0029] Explanation of figure marks:

[0030] 1 foldable large hopper, 2 spraying machine, 3 control box, 4 wheeled transport chassis, 5 support column, 6 inclined support, 7 lifting control device, 8 foldable baffle, 9 feeding belt, 10 roller, 11 drive motor, 12 belt conveyor device frame, 13 roller, 14 transmission belt, 1-1 hopper body, 1-2 hopper frame, 1-3 folding baffle, 2-1 spraying machine body, 2-2 opener, 4-1 tire, 4-2 groove, 7-1 horizontal connecting rod, 7-2 piston rod, 7-3 control rod, 8-1 foldable baffle body, 8-2 rotating baffle, 121 sliding groove. DETAILED DESCRIPTION

[0031] Example 1:

[0032] Please refer to Figures 1-10 A small cross-section tunnel continuous shotcrete feeding device, comprising a foldable large hopper 1, a pump feeding system, a belt conveying system, a wheeled transport chassis 4 and a lifting control device 7, the foldable large hopper 1 is fixedly connected to the upper end of the wheeled transport chassis 4, close to the front end of the wheeled transport chassis 4, the pump feeding system is fixedly connected to the upper end of the wheeled transport chassis 4 and is located at the lower end of the foldable large hopper 1, the belt conveying system is rotatably connected between a pair of support columns 5 fixedly connected to the upper end of the wheeled transport chassis 4, one end of which is located on the upper side of the foldable large hopper 1, the lower end of the lifting control device 7 is fixedly connected to the upper end of the wheeled transport chassis 4, and the two sides of one end surface of the lifting control device 7 are fixedly connected to the hopper frame 1-1 through a plurality of horizontal connecting rods 7-1, the lifting control device 7 is located between the pump feeding system and the inclined support 6, and the upper end of the lifting control device 7 is slidably connected to the two sides of the belt conveying system through a pair of piston rods 7-2 slidably connected to the upper end of the lifting control device 7; the foldable large hopper 1 comprises a folding baffle 1-3 rotatably connected to the upper end of the foldable large hopper 1 and located on the side close to the belt conveying system; the lifting control device 7 comprises a pair of control rods 7-3 fixedly connected to the middle ends of the two piston rods 7-2 and located on the upper side of the horizontal connecting rod 7-1, and the pair of control rods 7-3 can always be in contact with one end surface of the folding baffle 1-3 as the piston rods 7-2 are raised and lowered; the height can be adjusted according to the size of the small cross-section tunnel, the hopper capacity can be adjusted at the same time as the height of the adjusting device is adjusted, the shotcrete support standby period can be effectively shortened, and the construction support efficiency can be improved.

[0033] The front end and the middle end of the wheeled transport chassis 4 are rotationally connected with a pair of tires 4-1, and the rear end of the wheeled transport chassis 4 is provided with a through groove 4-2; the feeding device can be more conveniently moved in the tunnel, the belt conveying system can be rotated to a higher height, and the bottom end will not collide with the wheeled transport chassis 4.

[0034] The foldable large hopper 1 further comprises a hopper body 1-1 and a hopper frame 1-2, the lower end of the hopper frame 1-2 is fixedly connected to the upper end of the wheeled transport chassis 4, and the surrounding four end faces of the hopper body 1-1 are welded to the inner side of the upper end of the hopper frame 1-2; the foldable large hopper 1 can be more firmly fixed to the upper end of the wheeled transport chassis 4.

[0035] The pump feeding system comprises a sprayer 2 and a control box 3, the sprayer 2 and the control box 3 are electrically connected, and the control box 3 is located on one side of the sprayer 2; the sprayer 2 comprises a sprayer body 2-1 and an opener 2-2, the eccentric end of the opener 2-2 is rotationally connected to the motor output end in the sprayer body 2-1 and is located at the lower end of the foldable large hopper 1; the motor output end can be rotated by the control box 3 to drive the opener 2-2 to rotate, thereby realizing continuous and uniform feeding.

[0036] The belt conveying system comprises a belt conveying device and a foldable blocking groove 8, the foldable blocking groove 8 is fixedly connected to the upper end of the belt conveying device away from the foldable large hopper 1; the workers can pour the sprayed concrete mixture into the foldable blocking groove 8, thereby facilitating rapid unloading and effectively reducing the waste of the sprayed concrete mixture.

[0037] The belt conveying device comprises a feeding belt 9, a plurality of drag rollers 10, a driving motor 11, a belt conveying device frame 12, a pair of rollers 13 and a transmission belt 14, the pair of rollers 13 are rotationally connected to the two ends of the belt conveying device frame 12, the feeding belt 9 is clamped to the outer ends of the pair of rollers 13 and is located on the lower side of the foldable blocking groove 8, the plurality of drag rollers 10 are fixedly connected to the upper end of the belt conveying device frame 12, the upper end of the drag roller 10 is in contact with the inner end of the feeding belt 9, and the end of the roller 13 close to the foldable large hopper 1 is connected to the driving motor 11 fixedly connected to the upper end of the belt conveying device frame 12 through the transmission belt 14; the conveying capacity of the feeding belt 9 can be increased by supporting the drag roller 8, so that the concrete mixture can be fed into the foldable large hopper 1 through the belt conveying device.

[0038] The foldable blocking groove 8 comprises a foldable blocking groove body 8-1.

[0039] The upper end of the two mirror-symmetrical inclined supports 6 is fixedly connected with the upper end of the wheeled transport chassis 4; the belt transport system can stably rotate between the support system composed of a pair of support columns 5 and the inclined supports 6, and the height of the feeding device can be adjusted according to the height of the tunnel.

[0040] A sliding groove 121 is formed in each side end of the belt transport device frame 12, and the upper end of the piston rod 7-2 is slidingly connected in the sliding groove 121, so that the piston rod 7-2 can stably slide in the sliding groove 121; the rotation of the belt transport device frame 12 is controlled by the lifting of the piston rod 7-2, so that the height of the feeding device can be adjusted according to the height of the tunnel.

[0041] Working principle: as shown in Figure 1 , the worker pours the concrete mixture into the foldable blocking groove 8, and rotates the baffle 8-2 to block the concrete mixture to prevent it from spilling backward, which can effectively reduce the waste of concrete mixture; since the wheeled transport chassis 4 is provided with two pairs of tires 4-1, the worker can make the feeding device smoothly enter the small-section tunnel; at this time, the driving motor 11 is started, the output shaft of the driving motor 11 rotates, and the transmission belt 14 drives the drum 13 close to the foldable large hopper 1 to rotate counterclockwise, so that the feeding belt 9 conveys the concrete mixture on the feeding belt 9 from the lower end to the top end, and then into the foldable large hopper 1; at this time, the worker can control the rotation of the motor in the injection machine 2 through the control box 3, so as to drive the opening and closing device 2-2 connected thereto to rotate, so that the discharging is uniform, which can effectively reduce the waste of concrete material; at this time, the concrete mixture enters the injection machine 2 through the opening and closing device 2-2, and the injection machine 2 uses compressed air or other power to convey the concrete mixture along the pipeline to the nozzle, so that the concrete mixture is vertically injected on the surrounding rock surface at a high speed, and a kind of concrete is formed by the continuous impact of cement and aggregate in the injection process.

[0042] When the height of the entered small-section tunnel is higher, the height of the feeding device is lifted: as shown in Figure 7 , the foldable baffle 1-3 is inclined downward at this time, one end of the foldable baffle 1-3 is in contact with the control rod 7-3, the piston rod 7-2 is controlled to rise by the small air cylinder in the lifting control device 7, the upper end of the piston rod 7-2 is slidingly connected with the sliding groove 121, so that the belt transport device frame 12 rotates clockwise around the rod between a pair of support columns 5, at the same time, the piston rod 7-2 rises and drives the control rod 7-3 fixedly connected at the middle end to move upward, the control rod 7-3 is in contact with the foldable baffle 1-3, which can make the foldable baffle 1-3 rotate upward, as shown in Figure 8 , the foldable baffle 1-3 is in horizontal contact with the control rod 7-3, so that the foldable baffle 1-3 continues to rotate upward, as shown in Figure 9As shown, the folding baffle 1-3 is closest to the feeding belt 9 away from the rotating end, so that the folding baffle 1-3 continues to rotate upward, as shown Figure 10 As shown, the folding baffle 1-3 is fully closed with the hopper body 1-1, and the belt conveyor frame 12 is also rotated to the highest position; the maximum opening area can be increased, the capacity of the concrete mixture can be adjusted, the standby period of the shotcrete support can be effectively shortened, and the construction support efficiency can be improved.

[0043] When the height of the entering small-section tunnel is low, because of the self-gravity of the folding baffle 1-3, the reverse process of the lifting of the feeding device height step can be performed, so that the folding baffle 1-3 rotates downward, and the belt conveyor frame 12 also rotates to the lowest position; according to the height of the small-section tunnel, the height of the feeding device and the rotating folding baffle 1-3 can be adjusted through one power source, which has high flexibility and adaptability, and replaces the manpower to rotate the belt conveying system and the foldable large hopper 1, reduces the work intensity, and improves the work efficiency; the multiple horizontal connecting rods 7-1 can serve as a ladder to help the workers to check the condition of the device, and cooperate with the support column 5 and the inclined support 6 to enhance the firmness and stability of the feeding device, and each main structure is reasonably arranged to fully utilize the space.

[0044] Example 2: Different from example 1, the two side ends of the foldable baffle groove 8 adopt the baffle inclined to the outside of the feeding belt 9; the maximum opening area can be increased to facilitate rapid unloading.

[0045] Example 3: Different from example 1, the foldable baffle groove 8 further comprises a rotating baffle 8-2, which is rotationally connected to the upper end of one end of the foldable baffle groove body 8-1 perpendicular to the conveying direction of the belt conveyor; the rotating baffle 8-2 can cover the concrete mixture to reduce the waste of the concrete mixture.

Claims

1. A small cross-section tunnel continuous shotcrete feeding device, characterized in that: The utility model provides a kind of foldable large hopper, including sending pump system, belt conveying system, wheeled transport chassis (4) and lifting control device (7), foldable large hopper (1) is fixedly connected in the upper end of wheeled transport chassis (4), close to the front end of wheeled transport chassis (4), sending pump system is fixedly connected in the upper end of wheeled transport chassis (4), and located in the lower end of foldable large hopper (1), belt conveying system is rotatably connected between a pair of support columns (5) fixedly connected in the upper end of wheeled transport chassis (4), one end is located in the upper side of foldable large hopper (1), the lower end of lifting control device (7) is fixedly connected in the upper end of wheeled transport chassis (4), the two sides of lifting control device (7) one end surface are all fixedly connected with hopper frame (1-2) by multiple horizontal connecting rods (7-1), lifting control device (7) is located between sending pump system and inclined support (6), the upper end of lifting control device (7) is slidably connected with the two sides of belt conveying system by a pair of piston rods (7-2) slidably connected in the upper end of lifting control device (7); Foldable large hopper (1) includes a folding baffle (1-3), folding baffle (1-3) is rotatably connected in the upper end of foldable large hopper (1), and is located in the side close to belt conveying system; Lifting control device (7) includes a pair of control rods (7-3), a pair of control rods (7-3) are respectively fixedly connected in the middle end of two piston rods (7-2), and are located in the upper side of horizontal connecting rod (7-1), a pair of control rods (7-3) can be always in contact with the end surface of folding baffle (1-3) along with the lifting of piston rod (7-2); Belt conveying system includes belt conveying device and foldable blocking groove (8), foldable blocking groove (8) is fixedly connected in the upper end of belt conveying device far from the side of foldable large hopper (1); Belt conveying device includes feeding belt (9), multiple drag rollers (10), driving motor (11), belt conveying device frame (12), a pair of rollers (13) and transmission belt (14), a pair of rollers (13) are rotatably connected in the two ends of belt conveying device frame (12), feeding belt (9) is clamped with the outer end of a pair of rollers (13), and is located in the lower side of foldable blocking groove (8), multiple drag rollers (10) are all fixedly connected in the upper end of belt conveying device frame (12), the upper end of drag roller (10) is in contact with the inner end of feeding belt (9), and the one end of roller (13) close to foldable large hopper (1) is connected with driving motor (11) fixedly connected in the upper end of belt conveying device frame (12) through transmission belt (14); Foldable blocking groove (8) includes foldable blocking groove main body (8-1) and rotating baffle (8-2), rotating baffle (8-2) is rotatably connected in the upper end of one end of foldable blocking groove main body (8-1) perpendicular to the conveying direction of belt conveying device; The two side ends of belt conveying device frame (12) are all provided with a sliding groove (121), and the upper end of piston rod (7-2) is slidably connected in the sliding groove (121).

2. A small section tunnel continuous shotcrete feeding device according to claim 1, characterized in that: The front end and the middle end of the wheeled transport chassis (4) are rotatably connected with a pair of tires (4-1), and the rear end of the wheeled transport chassis (4) is provided with a through slot (4-2).

3. The small section tunnel continuous shotcrete feeding device according to claim 1, characterized in that: The foldable large hopper (1) further comprises a hopper main body (1-1) and a hopper frame (1-2), the lower end of the hopper frame (1-2) is fixedly connected to the upper end of the wheeled transport chassis (4), and the four peripheral end faces of the hopper main body (1-1) are welded to the inner side of the upper end of the hopper frame (1-2).

4. The small section tunnel continuous shotcrete feeding device according to claim 1, characterized in that: The pump delivery system comprises a sprayer (2) and a control box (3), the sprayer (2) and the control box (3) are electrically connected, and the control box (3) is located on one side of the sprayer (2); the sprayer (2) comprises a sprayer main body (2-1) and an opener (2-2), the eccentric end of the opener (2-2) is rotatably connected to the motor output end in the sprayer main body (2-1), and is located at the lower end of the foldable large hopper (1).

5. A small section tunnel continuous shotcrete feeding device according to claim 1, characterized in that: The two side ends of the foldable blocking groove (8) adopt the inclined baffle towards the outside of the feeding belt (9).

6. A small section tunnel continuous shotcrete feeding device according to claim 1, characterized in that: The two ends of the support column (5) are respectively fixedly connected to the upper ends of two mirror-symmetrical inclined supports (6), and the lower ends of the inclined supports (6) are fixedly connected to the upper end of the wheeled transport chassis (4).

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