A new type of gunite machine

Abstract

The application discloses a novel shotcreting unit, which comprises a mobile base and a shotcreting unit. The shotcreting unit comprises an automatic feeding mechanism, a batching auger set, a stirring and pushing auger and a gas-material mixing mechanism. The feeding mechanism, the batching auger set and the stirring and pushing auger all adopt a closed structure. The automatic feeding mechanism and the batching auger are arranged in pairs, and the batching auger set is arranged transversely. The shotcreting unit adopts closed automatic conveying of materials and automatic mixing of materials, eliminates dust emission, eliminates the harm of dust contact for workers, improves the safety of equipment operation, simultaneously simplifies the structure of the complete equipment, and effectively reduces the incidence of occupational diseases caused by noise and dust pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to a shotcrete machine, in particular to a novel shotcrete machine set. BACKGROUND

[0002] The shotcrete machine is widely used in engineering construction, mine, tunnel, mountain slope protection, culvert, subway, hydropower engineering, underground engineering and coal mine underground roadway shotcrete construction. At present, the existing shotcrete machine mainly adopts manual mixing, due to the abrasion of aggregate to friction plate, the gap leakage of shotcrete machine body produces a large amount of dust pollution environment and seriously threatens the health of workers, and in the process of mixing, a lot of noise is generated, which affects the health and safety of the on-site workers. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a novel shotcrete machine set, which adopts fully enclosed conveying and mixing to eliminate dust emission, improve equipment operation safety and eliminate the hazards of workers contacting dust.

[0004] To achieve the above object, the present application provides the following technical scheme: a novel shotcrete machine set, comprising a mobile base and a shotcrete machine set, the shotcrete machine set comprising a feeding mechanism, a batching auger and a mixing auger, the feeding mechanism, the batching auger and the mixing auger being closed housings, the feeding mechanism and the batching auger being arranged in pairs, and at least two pairs being provided; the batching auger is arranged in parallel with the horizontal plane;

[0005] The batching auger and the mixing auger are respectively fixedly installed on the mobile base through supports, and the upper end of the batching mechanism is respectively provided with a batching feed hopper for feeding; the lower end of the other end of the batching auger is respectively provided with a batching discharge hopper, and the batching auger is provided with a first propeller blade;

[0006] The mixing auger is provided with one, the upper end of one end of the mixing auger is provided with a mixing feed inlet, and the lower end of the other end is provided with a mixing discharge outlet, the first batching discharge hopper is connected with the mixing feed inlet, the mixing auger is provided with a second propeller blade, and the second propeller blade comprises at least two sections of second propeller blades;

[0007] The mixing discharge outlet of the mixing auger is connected with the feed inlet of an air-material mixing mechanism, and the discharge outlet of the air-material mixing mechanism is connected with a shotcrete mechanism;

[0008] A funnel type accelerator quantitative proportioner is arranged on the mixing feed inlet of the mixing auger;

[0009] The feeding mechanism comprises a material conveying mechanism, and a material shoveling mechanism is installed on the material conveying mechanism; the material conveying mechanism comprises an upper roller and a lower roller, the upper roller and the lower roller are connected through a belt or a chain, the material shoveling mechanism is fixed on the belt or the chain, a supporting base is installed at the bottom of the material conveying mechanism, the supporting base is provided with a roller at the bottom, and the side of the supporting base away from the lower roller is connected with the material conveying mechanism through an adjusting cylinder; the upper end of the material conveying mechanism is a discharging end, the lower end of the material conveying mechanism is a feeding end, the discharging end of the material conveying mechanism is connected with a material feeding hopper of a material mixing auger of the shotcreting machine group through a transfer belt conveyor, one end of the transfer belt conveyor is slidably connected with the discharging end of the material conveying mechanism, and the other end is rotatably connected above the material feeding hopper through a rotary platform; and the feeding end of the material conveying mechanism is located at a material accumulation position.

[0010] As a further optimization of the above scheme, the material mixing auger and the stirring auger are both horizontally installed, and the material mixing auger and the stirring auger are arranged in parallel.

[0011] As a further optimization of the above scheme, the material mixing auger and the stirring auger are both horizontally installed, and the first propelling blade and the second propelling blade are respectively driven to rotate by motors.

[0012] As a further optimization of the above scheme, the inner walls of the material mixing auger and the stirring auger are respectively fixed with rubber pad inner containers.

[0013] As a further optimization of the above scheme, the feeding port of the material and gas mixing mechanism is provided with an elastic pad.

[0014] As a further optimization of the above scheme, the side wall of the material and gas mixing mechanism is provided with an air outlet, and the air outlet is connected with a water tank through a hose.

[0015] As a further optimization of the above scheme, the second propelling blade comprises three sections, and the three-section second propelling blade is a non-continuous spiral blade.

[0016] As a further optimization of the above scheme, the end of the feeding mechanism away from the material feeding hopper is provided with a material collector.

[0017] As a further optimization of the above scheme, a baffle is connected between the material collector and the material conveying mechanism.

[0018] As a further optimization of the above scheme, a vibrator is arranged on the material feeding hopper of the material mixing auger.

[0019] With the above technical scheme, the novel shotcreting machine group has the following beneficial effects:

[0020] 1. The novel shotcrete unit of the present application is fully enclosed during the feeding, batching and mixing processes, thereby preventing dust from being blown out, improving the safety of the equipment operation, eliminating the harm of dust to the workers and reducing the incidence of silicosis.

[0021] 2. The novel shotcrete unit of the present application is provided with at least two sets of feeding mechanisms, and each set of feeding mechanism is matched with a set of batching auger, the feeding mechanism and the batching auger are operated simultaneously, thereby saving time and ensuring uniform mixing of the batching materials.

[0022] 3. The novel shotcrete unit of the present application is provided with a material collecting bin on the feeding mechanism, thereby further improving the feeding capacity.

[0023] 4. The novel shotcrete unit of the present application is provided with at least two sets of feeding mechanisms, and each set of feeding mechanism is matched with a set of batching auger, and a vibrator is arranged at the connection between the batching auger and the feeding mechanism, thereby ensuring timely feeding.

[0024] 5. The novel shotcrete unit of the present application adopts a non-rotor low-speed structure, thereby reducing noise pollution and its influence on the hearing of the construction workers, improving the attention and safety of the surrounding workers. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic view of the present application;

[0026] Fig. 2 is a structural schematic view of the batching auger of the present application;

[0027] Fig. 3 is a structural schematic view of the mixing auger of the present application;

[0028] Fig. 4 is a structural schematic view of the feeding mechanism of the present application;

[0029] Fig. 5 is a front view of the material conveying mechanism of the present application;

[0030] Fig. 6 is a connection schematic view of the shell and the material conveying mechanism of the present application;

[0031] Fig. 7 is a structural schematic view of the air-material mixing mechanism of the present application. DETAILED DESCRIPTION

[0032] The present application will be further described below by means of the description of the embodiments in conjunction with the drawings:

[0033] As Figs. 1-7As shown, this invention discloses a novel shotcrete unit, comprising a movable base 1 and a shotcrete unit 2. The shotcrete unit 2 includes a feeding mechanism, a feeding auger 3, and a mixing auger 4. The feeding mechanism, feeding auger 3, and mixing auger 4 are all enclosed housings. The feeding mechanism and feeding auger 3 are paired, with at least two pairs; the feeding auger 3 is arranged parallel to the horizontal plane.

[0034] The present invention provides three batching augers 3 and one stirring auger 4. The included angle between the batching augers 3 and the stirring auger 4 is 0 to 90°. In this embodiment, both the batching augers 3 and the stirring auger 4 are installed horizontally, that is, the included angle between the batching augers 3 and the horizontal plane is 0°. The batching augers 3 are arranged in parallel. The batching augers 3 can also be connected in series. In this embodiment, they are connected in parallel.

[0035] The batching auger 3 and the mixing auger 4 are fixedly mounted on the movable base 1 by brackets. The mixing auger 4 has a mixing inlet 41 at the top of one end and a mixing outlet 42 at the bottom of the other end. A waste discharge chamber (not shown) connected to the outside can be installed at the mixing inlet 41. A vibrating screen is installed at the connection between the mixing inlet 41 and the waste discharge chamber. The surface of the vibrating screen is covered with screen holes. The vibrating screen is fixed at an incline on the cross-section of the mixing inlet 41, with the lower end of the vibrating screen located above the waste discharge chamber. The waste discharge chamber allows for the screening out of large, unqualified particles of the mixture, improving the quality of the slurry. A funnel-shaped accelerator metering device is installed on the mixing inlet 41 of the mixing auger 4. The connection between the accelerator metering device and the mixing inlet is located below the vibrating screen. The batching auger 3 has a batching discharge hopper 31 at one end near the mixing inlet 41, and the batching discharge hopper 31 is connected to the mixing inlet 41. The other end of the batching auger 3 is provided with a batching feed hopper 32 for connection to the feeding mechanism. The batching auger 3 is provided with a first propulsion blade 5, and the mixing auger 4 is provided with a second propulsion blade 6. The second propulsion blade 6 includes three sections. The three sections of the second propulsion blade 6 are non-continuous spiral blades, which facilitates extending the movement time of the mixture in the mixing auger 4 and improving the uniformity of the mixing of the mixture by the mixing auger 4. In this embodiment, the first propulsion blade 5 and the second propulsion blade 6 are driven to rotate by a drive device installed on the mobile base 1. The drive device in this embodiment is a motor. The mixing outlet 42 of the stirring auger 4 is connected to the inlet of a gas-material mixing mechanism 7. The outlet of the gas-material mixing mechanism 7 is connected to a spraying mechanism. The spraying mechanism is a traditional spraying component, such as a combination of a spraying pipe and a hydrocyclone. The side wall of the gas-material mixing mechanism 7 is provided with an air outlet 71. The air outlet 71 is connected to a water tank through a hose. The water tank absorbs the dust mixed in the gas coming out of the air outlet 71, thereby preventing the spread of dust.

[0036] The inner walls of the feeding auger 3 and the mixing auger 4 of the present invention are respectively fixed with rubber pads. A layer of rubber pad is provided at the feed inlet of the gas-material mixing mechanism 7. On the one hand, it can reduce the noise during feeding, and on the other hand, it can reduce the wear of the feeding raw materials on the feeding auger 3, the mixing auger 4 and the feed inlet of the gas-material mixing mechanism 7, thus extending the service life of the feeding auger 3, the mixing auger 4 and the gas-material mixing mechanism 7.

[0037] In this invention, a feeding mechanism is connected to the feeding hopper 32 of the feeding auger 3. The feeding mechanism includes a material transport mechanism 10, on which a shoveling mechanism 8 is installed. The upper end of the material transport mechanism 10 is the discharge end, and the lower end of the material transport mechanism 10 is the feeding end. The discharge end of the material transport mechanism 10 is connected to the feeding hopper 32 of the feeding auger of the shotcrete unit. The feeding end of the material transport mechanism 10 is located at the material accumulation position. The material transport mechanism 10 is installed in a shell 15 with an internal cavity. The shell 15 is a cuboid pipe. The upper end of the shell 15 is provided with a discharge hopper 151, which corresponds to the discharge end of the material transport mechanism 10. The material conveying mechanism 10 includes an upper roller 101 and a lower roller 102. The upper roller 101 is located at the discharge hopper 151 of the housing 15. The lower end of the housing 15 has an open notch, the size of which is adapted to the lower roller 102, and the lower roller 102 is installed in the notch, protruding outside the housing 15. The housing 15 is in an inclined state, with an inclination angle of 10° to 70°. The material conveying mechanism 10 also has an inclination angle, which is consistent with that of the housing 15. The material conveying mechanism 10 is fixed inside the housing 15. The discharge hopper 151 of the housing 15 is connected to the feed auger 3 of the shotcrete unit via a transfer belt conveyor 11. One end of the transfer belt conveyor 11 is slidably connected to the discharge end of the material conveying mechanism 10, and the other end is rotatably connected above the feed hopper 32 via a rotary platform 12.

[0038] The upper roller 101 and the lower roller 102 of the present invention are connected by a belt 9 or a chain, and the shoveling mechanism 8 is fixed on the belt 9 or the chain. The shoveling mechanism 8 of the present invention adopts a partition plate, which is horizontally fixed on the belt 9 or the chain.

[0039] The lower roller 102 of this invention is driven to rotate by a drive device, which can be a motor or an electric motor, or the rotating shaft of the mixing auger of a shotcrete unit. The rotating shaft of the mixing auger is connected to the rotating shaft of the lower roller 102 via a flexible shaft. When a motor or electric motor is used, the motor or electric motor is directly connected to the rotating shaft of the lower roller 102 via a transmission device. This transmission device can be any one of belt drive, chain drive, or gear drive, or other transmission components capable of driving the lower roller 102 to rotate.

[0040] In addition, to improve the flexibility of movement, a support chassis 17 is installed at the center of the bottom side of the housing 15. The bottom of the support chassis 17 is provided with rollers 171, which are also driven to roll by a drive device, saving manpower. At the same time, the side of the support chassis 17 away from the lower roller 102 is connected to the housing 15 through an adjusting cylinder 172. This ensures that the tilt angle of the housing 15 can be adjusted at any time, so that the feeding mechanism can quickly adapt to the height of the feed inlet of the batching mechanism, making the application range of the present invention wider.

[0041] In this invention, spiral blades 16 are connected to the center of each end sidewall of the lower roller 102 via connecting shafts 161. The two spiral blades 16 rotate in opposite directions, and the connecting shafts 161 pass through the center of the spiral blades 16. The spiral blades 16 ensure that materials dispersed around the lower roller 102 are gathered and accumulated at the lower roller 102, guaranteeing a sufficient amount of material at the lower roller 102. The spiral blade 16 of the present invention is provided with a baffle 14 with a semi-circular cross-section on its back. The side of the spiral blade 16 near the supporting base 17 is covered by the baffle 14. The end of the baffle 14 away from the lower roller 102 is mounted on the ground via a bearing 162 or placed directly in the material pile, and the other end is mounted on the housing 15 via another bearing. This can prevent the material from accumulating on the side of the lower roller 102 near the supporting base 17 when the spiral blade 16 pushes the material. When the material accumulates on the side of the lower roller 102 near the supporting base 17, the shoveling mechanism 2 cannot shovel the material to the upper discharge port. The spiral blade 16, connecting shaft 16, and bearing 162 of the present invention constitute the collector 13 of the material transport mechanism 10.

[0042] In use, this invention first drives the lower roller 102 to rotate via a drive device. As the lower roller 102 rotates, it also drives the spiral blades 16 to rotate, thus continuously pushing surrounding material towards the lower roller 102. Simultaneously, when the shoveling mechanism 8 reaches the lower roller 102, it shovels the material and transports it to the discharge end of the upper roller 101. Finally, the material falls into the discharge hopper 151 at the upper roller 101 and enters the batching auger 3 through the discharge hopper 151. Because the shoveling mechanism 8 prevents material from falling back or scattering during shoveling, the proportion of material falling into the batching mechanism via the shoveling mechanism 8 remains constant when the rotational speed of the lower roller 102 is constant. This ensures the accuracy of the material proportioning and improves the quality of the sprayed slurry.

[0043] The transfer conveyor belt 11 of the present invention has a mounting bracket, and a belt is connected to both ends of the mounting bracket via drive rollers. One of the drive rollers is a drive roller, which is driven to rotate by another drive device. In this embodiment, in order to facilitate the retraction of the transfer conveyor belt 11 when not in use, the mounting bracket of the transfer conveyor belt 11 is a telescopic bracket, and the fixed end of the telescopic bracket is mounted on the rotary platform 12 by a cylinder or hydraulic cylinder 18. When the transfer conveyor belt 11 needs to be used, the telescopic bracket is extended by controlling the button of the hydraulic cylinder 18. The telescopic support of the present invention has two symmetrical slide rails 19 distributed along the length of the telescopic support on both sides of the movable frame. A sliding frame 20 is slidably connected between the two slide rails 19. The bottom of both sides of the sliding frame 20 is provided with pulleys 21 slidably connected to the slide rails 19. The discharge hopper 151 is detachably rotatably connected to the top of the sliding frame 20. For example, a bearing with a diameter adapted to the diameter of the discharge hopper 151 is provided at the center of the top of the sliding frame 20. A receiving step is provided on the inner ring of the bearing. The bottom of the discharge hopper 151 is provided with a snap-fit ​​step that matches the receiving step. In use, the snap-fit ​​step of the discharge hopper 151 is directly placed on the receiving step, and then the snap-fit ​​step is fastened to the receiving step by the bolt and nut assembly to realize the connection between the discharge hopper 151 and the transfer belt conveyor 11. When the transfer belt conveyor 11 is not in use, the snap-fit ​​step can be directly removed from the receiving step, which is convenient and quick.

[0044] The feeding mechanism adopts an auger structure. The feeding mechanism 10 is equipped with a feeding spiral blade 9. The feeding mechanism 10 is sealed to the second feeding hopper 32 to facilitate automatic feeding. Through the conveying of the feeding mechanism 10, the feeding ratio is accurately controlled, reducing labor intensity. The end of the feeding mechanism 10 away from the second hopper 32 is equipped with a collection bin 12 to improve the stability of the feeding mechanism 10 during feeding.

[0045] Because the discharge hopper 151 can slide along the slide rail 19 of the transfer conveyor 11 and is also rotatably connected to the sliding frame 20, during feeding, when the material transport mechanism 10 moves with the chassis 17, the discharge hopper 151 slides with the sliding frame 20 and rotates on the sliding frame 20, and the transfer conveyor 11 also rotates around the rotation center of the rotary platform 12, automatically adapting to the distance between the discharge hopper and the transfer conveyor 11, without stopping the material transport mechanism to move, thus achieving continuous and stable continuous feeding.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A novel shotcrete unit, comprising a movable base (1) and a shotcrete unit (2), characterized in that: The shotcrete unit (2) includes a feeding mechanism, a feeding auger (3) and a mixing auger (4). The feeding mechanism, the feeding auger (3) and the mixing auger (4) are all sealed shells. The feeding mechanism and the feeding auger (3) are paired and there are at least two pairs. The batching auger (3) and the stirring auger (4) are respectively fixedly installed on the movable base (1) by the bracket. A batching feed hopper (32) for feeding is provided above one end of the batching auger (3), and a batching discharge hopper (31) is provided below the other end of the batching auger (3). A first propulsion blade (5) is provided inside the batching auger (3). The stirring auger (4) is provided, with a mixing inlet (41) at the upper part of one end and a mixing outlet (42) at the lower part of the other end. The batching outlet hopper (31) is connected to the mixing inlet (41). The stirring auger (4) is provided with a second propulsion blade (6), which includes at least two sections of the second propulsion blade (6). The mixing outlet (42) of the stirring auger (4) is connected to the inlet of an air-material mixing mechanism (7), and the outlet of the air-material mixing mechanism (7) is connected to the spraying mechanism. The mixing inlet (41) of the stirring auger is equipped with a funnel-shaped quick-setting agent metering device; The feeding mechanism includes a material conveying mechanism (10), on which a shoveling mechanism (8) is installed. The material conveying mechanism (10) includes an upper roller (101) and a lower roller (102). The upper roller (101) and the lower roller (102) are connected by a belt (9) or a chain. The shoveling mechanism (8) is fixed on the belt (9) or the chain. A support chassis (17) is installed at the bottom of the material conveying mechanism (10). The bottom of the support chassis (17) is provided with rollers (171), and the side of the support chassis (17) away from the lower roller (102) is open. The material conveying mechanism (10) is connected to the adjusting hydraulic cylinder (172). The upper end of the material conveying mechanism (10) is the discharge end, and the lower end of the material conveying mechanism (10) is the feed end. The discharge end of the material conveying mechanism (10) is connected to the feed hopper (32) of the feed auger (3) of the shotcrete unit through the transfer belt conveyor (11). One end of the transfer belt conveyor (11) is slidably connected to the discharge end of the material conveying mechanism (10), and the other end is rotatably connected above the feed hopper (32) through the rotary platform (12). The feed end of the material conveying mechanism (10) is located at the material accumulation position. The transfer conveyor belt (11) has a mounting bracket, and a belt is connected to both ends of the mounting bracket via drive rollers. One of the drive rollers is a drive roller, which is driven to rotate by another drive device. The mounting bracket of the transfer conveyor belt (11) is a telescopic bracket, and the fixed end of the telescopic bracket is mounted on the rotary platform (12) via a cylinder or hydraulic cylinder (18). When the transfer conveyor belt (11) needs to be used, the telescopic bracket is extended by controlling the button of the hydraulic cylinder (18). Two symmetrical extension rods are provided on both sides of the movable frame on the telescopic bracket. The support has slides (19) distributed along its length. A sliding frame (20) is slidably connected between two slides (19). The bottom of both sides of the sliding frame (20) is provided with pulleys (21) slidably connected to the slides (19). The top of the discharge hopper (151) and the sliding frame (20) are detachably rotatably connected. A bearing with a diameter adapted to the diameter of the discharge hopper (151) is provided at the center of the top of the sliding frame (20). A receiving step is provided on the inner ring of the bearing. The bottom of the discharge hopper (151) is provided with a snap-fit ​​step that matches the receiving step.

2. The novel shotcrete unit according to claim 1, characterized in that: The batching auger (3) is installed in parallel with the stirring auger (4) and is connected in parallel with the batching auger (3).

3. The novel shotcrete unit according to claim 1, characterized in that: The batching auger (3) and the stirring auger (4) are both installed horizontally, and the first propulsion blade (5) and the second propulsion blade (6) are driven to rotate by the driving equipment.

4. A novel shotcrete unit according to claim 2 or 3, characterized in that: The inner walls of the ingredient auger (3) and the mixing auger (4) are respectively fixed with rubber pads.

5. A novel shotcrete unit according to claim 4, characterized in that: A rubber pad is provided at the inlet of the gas-material mixing mechanism (7).

6. A novel shotcrete unit according to claim 5, characterized in that: The gas mixing mechanism (7) has an air outlet (71) on its side wall, which is connected to a water tank or dust purification bag via a hose.

7. A novel shotcrete unit according to claim 6, characterized in that: The second propulsion blade (6) comprises at least two segments, and the second propulsion blade (6) is a discontinuous helical blade.

8. A novel shotcrete unit according to claim 7, characterized in that: The feeding mechanism is equipped with a collector (13) at the end away from the feeding hopper (32).

9. A novel shotcrete unit according to claim 8, characterized in that: A baffle (14) is connected between the collector (13) and the material transport mechanism (10).

10. A novel shotcrete unit according to claim 9, characterized in that: The batching auger (3) has a vibrating screen on its batching feed hopper (32).

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