Conveying device capable of automatically proportioning and mixing and spiral conveyer

Abstract

The utility model relates to the technical field of concrete mixing and conveying, in particular to an automatic proportioning and mixing conveying device which comprises a machine frame, a hopper arranged at the rear end of the machine frame, a conveying assembly arranged in the machine frame and a power mechanism for driving the conveying assembly. Two parallel and adjacent conveying assemblies are arranged in the rack, each conveying assembly comprises a spiral shaft and a spiral blade fixedly arranged on the spiral shaft, the spiral directions of the spiral blades of the two conveying assemblies are opposite, and the spiral shafts rotate towards each other; the interior of the hopper is divided into a plurality of material discharging areas, and the proportion of the conveying amount of the conveying assemblies corresponding to the different material discharging areas is consistent with the proportion of the using amount of different materials. The problem that cement, gravel and the like cannot be fully mixed while being transported by an existing coal mine laneway site injection machine is solved.

Description

Technical Field

[0001] This utility model relates to the field of concrete mixing and conveying technology, specifically to an automatic proportioning and mixing conveying device and a screw conveyor. Background Technology

[0002] Shotcrete support in coal mine tunnels is a major support method and an important technological process, and it is widely used in coal mine tunnels. The shotcrete support process involves mixing cement, sand, and gravel in a specific ratio, thoroughly mixing them, adding an appropriate amount of accelerator, and then using a shotcrete machine powered by compressed air. Water is added to the nozzle through a delivery pipe, and the mixture is sprayed at high speed onto the tunnel walls to harden and support the tunnel.

[0003] Existing shotcrete machines in coal mine tunnels typically use different hoppers along the length of a single screw conveyor shaft to feed and transport cement, sand, and gravel, mixing them during transport. However, because the sand, gravel, and cement are added separately along the length of the screw conveyor shaft, the materials are subject to the action of the screw blades during transport, often resulting in only limited mixing. This is especially noticeable when there are many types of materials to be mixed, leading to uneven quality of the concrete sprayed onto the rock wall. This necessitates multiple sprayings and repairs to achieve the desired support effect, reducing work efficiency and increasing material and labor costs. Summary of the Invention

[0004] This invention addresses the problem that existing on-site shotcrete machines in coal mine tunnels cannot achieve sufficient mixing of cement, sand, and gravel during transportation. It provides an automatic proportioning and mixing conveying device and a screw conveyor that can fully mix cement, sand, and gravel during transportation, thereby improving the quality and efficiency of shotcrete support.

[0005] To solve the above problems, the technical solution of the utility model is:

[0006] An automatic proportioning and mixing conveying device includes a frame, a hopper located at the rear end of the frame, a conveying assembly located inside the frame, and a power mechanism for driving the conveying assembly. The front end of the frame is provided with a discharge port. There are two parallel and adjacent conveying assemblies inside the frame. Each conveying assembly includes a spiral shaft and spiral blades fixed on the spiral shaft. The spiral blades of the two conveying assemblies rotate in opposite directions, and the spiral shafts rotate towards each other.

[0007] The hopper is divided into multiple material feeding zones, and the proportion of conveying volume of the conveying components corresponding to different material feeding zones is consistent with the proportion of material usage for different materials.

[0008] The above scheme features two parallel and adjacent conveying components within the frame, which improves material conveying efficiency. The conveying components utilize a screw shaft and screw blades for transport, ensuring thorough mixing of materials during transport. Furthermore, by dividing the hopper into multiple material feeding zones, and ensuring that the conveying capacity of the conveying components corresponding to different material feeding zones matches the material usage ratio, automatic proportioning is achieved when materials enter the conveying components from the hopper, effectively improving work efficiency.

[0009] Based on the above solution, the present invention can be further improved as follows.

[0010] Furthermore, the hopper is provided with a partition plate 1, which divides the hopper into at least two feeding areas 1, one in front and one in back. Each feeding area 1 is rotatably connected to a guide plate, and adjacent guide plates are staggered, with the ends of the guide plates located between the two conveying components; or the hopper is provided with a partition plate 2 and a partition plate 3, with a partition plate 2 provided along the length direction of the conveying component, dividing the hopper into two feeding areas 2, one in the left and one in the right. Each feeding area 2 is provided with at least one partition plate 3 along the width direction of the conveying component.

[0011] Alternatively, the same number of hoppers can be set according to the type of material to be fed, and each hopper is rotatably connected to a guide plate. The adjacent guide plates are staggered, and the ends of the guide plates are located between the two conveying components.

[0012] By adopting the above-mentioned further solution, through the setting of partition plates or diversion plates, a material will only enter one conveying component, thereby ensuring that different materials are added according to the required amount.

[0013] Furthermore, a support platform is fixedly or rotatably connected to the hopper for supporting containers or bags containing materials.

[0014] By adopting the above-mentioned further solution, the labor intensity of operators can be reduced by placing the packaged materials on the support platform and then pouring them into the hopper.

[0015] Furthermore, the diameter and pitch of the spiral blades located at the lower part of the hopper are smaller than the diameter and pitch of the other spiral blades;

[0016] The diameters and pitches of the spiral blades of the two conveying components located at the bottom of the hopper may be the same or different.

[0017] By adopting the above-mentioned further solution, the mixing effect of materials can be further improved by increasing the diameter and pitch of the spiral blades that are not in the lower part of the hopper. Furthermore, the diameter and pitch of the spiral blades of the two conveying components in the lower part of the hopper can be adjusted according to the proportion of different materials added, thereby adapting to different conveying needs.

[0018] Furthermore, the power mechanism includes a motor that transmits power to the helical shaft of any conveying component via belt drive or chain drive;

[0019] The ends of the spiral shafts of the two conveying components are equipped with gears and are engaged.

[0020] A screw conveyor including the above-described automatic proportioning and mixing conveying device further includes a base, on which rollers are provided, and a support assembly is provided between the base and the frame;

[0021] The support assembly includes a telescopic structure and a guide structure. One end of the telescopic structure is rotatably connected to the frame and the other end is rotatably connected to the base. Both ends of the guide structure are rotatably connected to the frame and the base, respectively.

[0022] By adopting the above solution, the conveying angle of the screw conveyor can be adjusted according to actual needs through the support components, thereby adapting to different working environments and spraying requirements; at the same time, the loading height of the screw conveyor can be reduced, thereby reducing the labor intensity of the workers.

[0023] Furthermore, the guide structure includes a first rod and a second rod sleeved within the first rod. The end of the first rod not sleeved with the second rod is rotatably connected to the frame, and the end of the second rod not sleeved within the first rod is rotatably connected to the base. The structure is simple.

[0024] Furthermore, the guide structure is symmetrically arranged on both sides of the frame, and a connecting seat is fixedly provided at the bottom of the frame. The telescopic structure is rotatably connected to the frame through the connecting seat. Two support rods are provided on the connecting seat. The two support rods are symmetrically arranged on both sides of the telescopic structure. One end of the support rod is fixedly connected to the connecting seat, and the other end is fixedly connected to the rod body.

[0025] By adopting the above-mentioned further solution, by symmetrically setting guide structures on both sides of the frame and additionally setting support rods, one end of which is fixedly connected to the rod body and the other end is fixedly connected to the frame, the stability of the screw conveyor during adjustment of the conveying angle and operation can be effectively guaranteed.

[0026] Furthermore, the front end of the base is rotatably connected to the guide structure, and the rear end is rotatably connected to the frame; the telescopic structure is a hydraulic cylinder or a pneumatic cylinder.

[0027] Furthermore, the top of the frame is open and fixedly equipped with a dust removal component. The dust removal component is located at the front end of the hopper. The dust removal component includes a nozzle, a water pipe, and a switch valve connected to a water source. The switch valve is connected to the nozzle through the water pipe. The nozzle's outlet faces the inside of the frame, which can reduce dust pollution during operation, improve the working environment of the staff, and reduce dust damage to the equipment.

[0028] The beneficial effects of this utility model through the above technical solution are as follows:

[0029] 1. In this utility model, by setting two parallel conveying components, and the conveying components adopt the form of a spiral shaft and spiral blades for conveying, the materials can be fully mixed during the conveying process. By dividing the hopper into multiple material feeding zones, and the proportion of the conveying volume of the conveying components corresponding to different material feeding zones is consistent with the proportion of the material usage, the materials can achieve automatic proportioning when they enter the conveying components through the hopper, which effectively improves work efficiency.

[0030] 2. In this utility model, by symmetrically arranging two guide structures on both sides of the frame, and additionally providing a support rod that is simultaneously connected to the connecting seat (i.e., the telescopic structure) and the guide structure, the stability of the screw conveyor during adjustment of the conveying angle and operation is effectively guaranteed. Attached Figure Description

[0031] Figure 1 This is a top view of the present invention;

[0032] Figure 2 yes Figure 1 One of the sectional views at point AA;

[0033] Figure 3 yes Figure 1 Sectional view at point BB;

[0034] Figure 4 yes Figure 1 Sectional view at point AA (second section);

[0035] Figure 5 This is the front view of this utility model;

[0036] Figure 6 This is a left view of the present invention;

[0037] Figure 7 yes Figure 5 A cross-sectional view of the supporting component at the CC position;

[0038] Figure 8 This is one of the structural schematic diagrams of the dust removal component of this utility model;

[0039] Figure 9This is the second structural schematic diagram of the dust removal component of this utility model;

[0040] The attached diagram is labeled as follows: 1 is the frame, 11 is the conveying trough, 12 is the connecting seat, 2 is the hopper, 21 is the diverter plate, 22 is the second partition plate, 23 is the support platform, 3 is the conveying assembly, 32 is the screw shaft, 33 is the screw blade, 4 is the power mechanism, 41 is the motor, 42 is the reducer, 43 is the chain, 5 is the base, 51 is the roller, 6 is the support assembly, 61 is the telescopic structure, 62 is the guide structure, 621 is the first rod, 622 is the second rod, 63 is the support rod, 7 is the dust removal assembly, 71 is the nozzle, 72 is the water pipe, and 73 is the switch valve. Detailed Implementation

[0041] The utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0042] like Figures 1-9 As shown, this embodiment discloses an automatic proportioning and mixing conveying device, including a frame 1, a hopper 2 placed at the rear end of the frame 1, a conveying assembly 3 placed inside the frame 1, and a power mechanism 4 for driving the conveying assembly 3. The front end of the frame 1 is provided with a discharge port. There are two parallel and adjacent conveying assemblies 3 inside the frame 1. The conveying assembly 3 includes a spiral shaft 32 and spiral blades 33 fixed on the spiral shaft 32. The spiral blades 33 of the two conveying assemblies 3 rotate in opposite directions, and the spiral shafts 32 rotate towards each other, which can make the materials fully mixed during the conveying process.

[0043] The hopper 2 is divided into multiple material feeding zones. The ratio of the conveying volume of the conveying components corresponding to different material feeding zones is consistent with the ratio of the material usage, so that when the material enters the conveying component 3 through the hopper 2, the automatic proportioning effect can be achieved.

[0044] In this embodiment, the frame 1 is provided with two conveying grooves 11, and the two conveying components 3 are respectively located in the two conveying grooves 11.

[0045] In one possible implementation, the hopper 2 is provided with a partition plate 1, which divides the hopper 2 into at least two feeding areas 1, front and back. Each feeding area 1 is rotatably connected to a guide plate 21, and adjacent guide plates 21 are staggered, with the ends of the guide plates 21 located between two conveying components 3; or the hopper 2 is provided with a partition plate 22 and a partition plate 3, with a partition plate 22 provided along the length direction of the conveying component 3, dividing the hopper 2 into two feeding areas 2, left and right. Each feeding area 2 is provided with at least one partition plate 3 along the width direction of the conveying component 3.

[0046] Alternatively, the same number of hoppers 2 can be set according to the type of material to be fed. Each hopper 2 is rotatably connected to a guide plate 21. The adjacent guide plates 21 are staggered, and the ends of the guide plates 21 are located between the two conveying components 3, so that a material will only enter one conveying component 3, thereby ensuring that different materials are added according to the amount used.

[0047] In this embodiment, there are two hoppers 2, which are arranged along the length of the conveying assembly 3; and a vertical baffle is provided between the two conveying channels 11 located below the hopper 2, and the end of the diverting plate 21 is placed on the baffle, thereby separating the two conveying assemblies below the hopper 2.

[0048] As one possible implementation, a support platform 23 is fixedly or rotatably connected to the hopper 2 for supporting containers or bags containing materials;

[0049] In this embodiment, the screw conveyor is used in coal mine tunnels, and the width of the equipment is required to be not too wide. Therefore, the support platform 23 is rotatably connected to the rear end of the hopper 2, and the frame 1 is provided with a support plate 12 to support the support platform 23.

[0050] As one possible implementation, the diameter and pitch of the spiral blades 33 located at the lower part of the hopper 2 are smaller than the diameter and pitch of the other spiral blades 33. The lower part of the hopper is the feeding area of ​​the conveying component 3, and the part not located at the lower part of the hopper is the mixing and stirring area of ​​the conveying component 3. By setting the diameter and pitch of the spiral blades 33 in the mixing and stirring area and the feeding area, the mixing effect of the material is further improved.

[0051] The diameters and pitches of the spiral blades 33 of the two conveying components 3 located at the lower part of the hopper 2 are the same or different;

[0052] In this embodiment, the diameters and pitches of the spiral blades 33 of the two conveying components 3 at the bottom of the hopper are different, thereby achieving a quantitative proportion of cement and sand.

[0053] In one possible implementation, the power mechanism 4 includes a motor 41, a reducer 42, and a chain or belt 43. The motor 41 is located at the front end of the frame 1 and is connected to the reducer 42. The output end of the reducer 42 is provided with a drive sprocket or drive pulley. The end of any of the spiral shafts 32 is provided with a driven sprocket or driven pulley. The drive sprocket or drive pulley is connected to the driven sprocket or driven pulley via the chain or belt 43.

[0054] The ends of the spiral shafts 32 of the two conveying components 3 are provided with gears and are engaged;

[0055] In this embodiment, a chain and sprocket transmission method is used.

[0056] This embodiment also discloses a screw conveyor including the above-described automatic proportioning and mixing conveying device, and further includes a base 5, on which rollers 51 are provided, and a support component 6 is provided between the base 5 and the frame 1 for adjusting the conveying angle of the screw conveyor;

[0057] The support component 6 includes a telescopic structure 61 and a guide structure 62. One end of the telescopic structure 61 is rotatably connected to the frame 1 and the other end is rotatably connected to the base 5. Both ends of the guide structure 62 are rotatably connected to the frame 1 and the base 5, respectively, so that the end of the frame 1 rotatably connected to the telescopic mechanism 61 can move up and down.

[0058] In one possible implementation, the guide structure 62 includes a first rod 621 and a second rod 622 sleeved within the first rod 621. The end of the first rod 621 not sleeved with the second rod 622 is rotatably connected to the frame 1, and the end of the second rod 622 not sleeved within the first rod 621 is rotatably connected to the base 5.

[0059] In one possible implementation, the guide structure 62 is symmetrically arranged on both sides of the frame 1. The bottom end of the frame 1 is fixedly provided with a connecting seat 12. The telescopic structure 61 is rotatably connected to the frame 1 through the connecting seat 12. The connecting seat 12 is provided with two support rods 63. The two support rods 63 are symmetrically arranged on both sides of the telescopic structure 61. One end of the support rod 63 is fixedly connected to the connecting seat 12, and the other end is fixedly connected to the rod body 621, which can effectively ensure the stability of the screw conveyor when adjusting the conveying angle and during operation.

[0060] In this embodiment, ribs with holes in the middle are symmetrically fixed at the top center of the frame 1. A shaft passes through the holes of the ribs, and both ends of the shaft extend out of the ribs. The ends of the two rods 621 without rods 622 are rotatably connected to the ends of the shaft, and wear-resistant sleeves are fitted at the rotatable connection. Fastening plates and fastening nuts are provided on the end faces of the shaft to prevent the shaft from passing through the rods 621. The rods 622 are rotatably connected to the base 5 in a similar manner.

[0061] In one possible implementation, the front end of the base 5 is rotatably connected to the guide structure 62, and the rear end is rotatably connected to the frame 1; the telescopic structure 61 is a hydraulic cylinder or a pneumatic cylinder.

[0062] As one possible implementation, the top of the frame 1 is open and fixedly equipped with a dust removal component 7. The dust removal component 7 is located at the front end of the hopper 2. The dust removal component 7 includes a nozzle 71, a water pipe 72, and a switch valve 73 connected to a water source. The switch valve 73 is connected to the nozzle 71 through the water pipe 72. The nozzle 71 has its outlet facing the inside of the frame 1, which can reduce dust pollution during operation, improve the working environment of the staff, and reduce dust damage to the equipment.

[0063] In this embodiment, during use, sand and cement are fed through two hoppers 2 respectively. Under the action of the guide plate 21 inside the hopper 2, the sand and cement fall into two conveying components 3 respectively. The diameter and pitch of the spiral blades 33 in the two conveying components 3 located below the hopper 2 are different, so the amount of material conveyed by the spiral blades 33 of the conveying components 3 in one rotation is different. Therefore, the operator only needs to continuously add material into the hopper 2, and the conveying components 3 can achieve automatic proportioning when conveying materials. Moreover, since there are two conveying components 3, both of which adopt the conveying form of spiral shaft 32 and spiral blades 33, the materials can be automatically mixed during the conveying process. Therefore, the conveying device and spiral conveyor in this utility model can achieve the technical effect of automatic proportioning and mixing.

[0064] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Any equivalent or equivalent modifications or substitutions to the technical solutions of the present invention without departing from the spirit of the present invention or the scope of disclosure shall fall within the protection scope of the present invention.

Claims

1. An automatic proportioning and mixing conveying device, comprising a frame (1), a hopper (2) located at the rear end of the frame (1), a conveying assembly (3) located inside the frame (1), and a power mechanism (4) for driving the conveying assembly (3), wherein the front end of the frame (1) is provided with a discharge port, characterized in that, The frame (1) contains two parallel and adjacent conveying components (3). Each conveying component (3) includes a spiral shaft (32) and spiral blades (33) fixed on the spiral shaft (32). The spiral blades (33) of the two conveying components (3) rotate in opposite directions, and the spiral shafts (32) rotate towards each other. The hopper (2) is divided into multiple material feeding zones, and the ratio of the conveying volume of the conveying components corresponding to different material feeding zones is consistent with the ratio of the material consumption.

2. The automatic proportioning and mixing conveying device according to claim 1, characterized in that, The hopper (2) is provided with a partition plate 1, which divides the hopper (2) into at least two feeding areas 1, front and back. Each feeding area 1 is rotatably connected with a guide plate (21). Adjacent guide plates (21) are staggered, and the ends of the guide plates (21) are located between the two conveying components (3). Alternatively, the hopper (2) is provided with a partition plate 2 (22) and a partition plate 3. The partition plate 2 (22) is provided along the length direction of the conveying component (3), dividing the hopper (2) into two feeding areas 2, left and right. Each feeding area 2 is provided with at least one partition plate 3 along the width direction of the conveying component (3). Alternatively, the same number of hoppers (2) can be set according to the type of material. Each hopper (2) is rotatably connected with a guide plate (21). The adjacent guide plates (21) are staggered, and the ends of the guide plates (21) are located between the two conveying components (3).

3. The automatic proportioning and mixing conveying device according to claim 2, characterized in that, The hopper (2) is fixedly or rotatably connected to a support platform (23) for carrying containers or bags containing materials.

4. The automatic proportioning and mixing conveying device according to claim 2, characterized in that, The diameter and pitch of the spiral blade (33) located at the lower part of the hopper (2) are smaller than the diameter and pitch of the other spiral blades (33); The diameter and pitch of the spiral blades (33) of the two conveying components (3) located at the lower part of the hopper (2) are the same or different.

5. The automatic proportioning and mixing conveying device according to claim 2, characterized in that, The power mechanism (4) includes a motor (41), which transmits power to the helical shaft (32) of any conveying component (3) via belt drive or chain drive; The ends of the spiral shafts (32) of the two conveying components (3) are provided with gears and are engaged.

6. A screw conveyor comprising the conveying device according to any one of claims 1 to 5, further comprising a base (5) on which rollers (51) are provided, characterized in that, A support assembly (6) is provided between the base (5) and the frame (1). The support component (6) includes a telescopic structure (61) and a guide structure (62). One end of the telescopic structure (61) is rotatably connected to the frame (1) and the other end is rotatably connected to the base (5). Both ends of the guide structure (62) are rotatably connected to the frame (1) and the base (5) respectively.

7. The screw conveyor according to claim 6, characterized in that: The guide structure (62) includes a first rod (621) and a second rod (622) sleeved inside the first rod (621). The end of the first rod (621) not sleeved with the second rod (622) is rotatably connected to the frame (1), and the end of the second rod (622) not sleeved inside the first rod (621) is rotatably connected to the base (5).

8. The screw conveyor according to claim 7, characterized in that: The guide structure (62) is symmetrically arranged on both sides of the frame (1). The bottom end of the frame (1) is fixedly provided with a connecting seat (12). The telescopic structure (61) is rotatably connected to the frame (1) through the connecting seat (12). The connecting seat (12) is provided with two support rods (63). The two support rods (63) are symmetrically arranged on both sides of the telescopic structure (61). One end of the support rod (63) is fixedly connected to the connecting seat (12), and the other end is fixedly connected to the rod body (621).

9. The screw conveyor according to claim 6, characterized in that, The front end of the base (5) is rotatably connected to the guide structure (62), and the rear end is rotatably connected to the frame (1); the telescopic structure (61) is a hydraulic cylinder or a pneumatic cylinder.

10. The screw conveyor according to claim 6, characterized in that, The top of the frame (1) is open and a dust removal component (7) is fixedly provided. The dust removal component (7) is located at the front end of the hopper (2). The dust removal component (7) includes a nozzle (71), a water pipe (72) and a switch valve (73) connected to a water source. The switch valve (73) is connected to the nozzle (71) through the water pipe (72). The nozzle (71) has its outlet facing the inside of the frame (1).

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