Cement-stone dust-clay composite grouting material premixing device

Abstract

The application discloses a cement-stone powder-clay composite grouting material premixing device, which comprises a belt conveyor, a plurality of feeding bins and a rotary mixing box, a transition cylinder, an opening adjusting device and a discharging mechanism arranged in sequence at the lower side of the feeding bins. The belt conveyor comprises a rack, a conveying belt and a main shaft arranged at one end of the conveying belt. The discharge port of the discharging mechanism is opposite to the conveying belt, and the position where the materials fall on the conveying belt is a discharging position. A material thickness adjusting position is arranged upstream of the discharging position, and a mixing position is arranged downstream of the discharging position. In the conveying process of the clay from the stacking position to the grouting slurry preparation station, the cement, the stone powder and the clay can be mixed and premixed by using the conveying belt, the traditional secondary grouting process is not needed any more, and the equipment cost of the grouting slurry preparation station can be reduced.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology. Specifically, it relates to a premixing device for cement-stone powder-clay composite grouting materials. Background Technology

[0002] Reinforcement grouting is a technique that involves injecting grout into the surrounding rock through boreholes. The grouting pressure forces the grout to diffuse into the fissures of the rock, forming a reinforcement zone, or grouting curtain, thereby improving the integrity of the rock mass and enhancing its strength. It is frequently used as a reinforcement measure in tunnel and foundation construction. Current grouting material preparation primarily involves first preparing clay slurry, then adding other substances to it. For example, as disclosed in Chinese patent CN203765807U, a primary sand removal and slurry preparation stage is used to prepare coarse and fine clay slurries. The fine clay slurry and cement are then mixed evenly in a high-speed vortex slurry mixer. This process requires three mixing tanks, and even conventional grouting material preparation requires at least two mixing tanks / devices. Furthermore, the installation of these mixing tanks / devices requires space, making it difficult to reduce the cost of the grouting station. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a cement-stone powder-clay composite grouting material premixing device that can realize the preparation and premixing of main materials.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] A cement-stone powder-clay composite grouting material premixing device includes a belt conveyor, multiple feeding hoppers, and a rotary mixing box, a transition cylinder, an opening adjustment device, and a discharge mechanism arranged sequentially below the feeding hoppers. The belt conveyor includes a frame, a conveyor belt, and a main shaft located at one end of the conveyor belt. The discharge port of the discharge mechanism faces the conveyor belt, and the position where the material falls onto the conveyor belt is designated as the discharge position. Above the conveyor belt, there is a material thickness adjustment position upstream of the discharge position and a mixing position downstream of the discharge position. The material thickness adjustment position is equipped with a material thickness adjustment mechanism for adjusting the thickness of the material on the conveyor belt, and the mixing position is equipped with a transverse mixing mechanism for mixing the materials along the width direction of the conveyor belt.

[0006] The opening adjustment device includes a horizontally movable opening plate and an opening adjustment mechanism; the unloading mechanism includes an unloading impeller and an unloading synchronous wheel coaxially arranged with the unloading impeller; the material thickness adjustment device includes a vertically movable baffle plate and a first adjustment mechanism for adjusting the height of the baffle plate; the transverse mixing mechanism includes a scrambling bar that moves regularly across the surface of the conveyor belt.

[0007] The first adjustment mechanism is connected to the opening adjustment mechanism via a first transmission belt, so that the operation of the first adjustment mechanism can realize the translation of the opening plate; a first synchronous pulley is provided on the main shaft of the conveyor, and the unloading synchronous pulley is connected to the first synchronous pulley via a second transmission belt, so that the rotation speed of the unloading impeller is positively correlated with the conveying speed of the conveyor belt.

[0008] Furthermore, the first adjustment mechanism includes a baffle mounting plate, a baffle bracket horizontally clamped on the frame, an adjusting nut located at the center of the upper part of the baffle bracket, an adjusting screw meshing with the adjusting nut, a handle fixedly mounted on the top of the adjusting screw, a mounting base fixedly mounted at the center of the top of the baffle plate, an intermediate synchronous pulley and an intermediate transmission belt located on the side of the frame. The bottom end of the adjusting screw is rotatably connected to the mounting base. A baffle gear and a baffle synchronous pulley are coaxially mounted on one of the baffle mounting plates via a baffle rotating shaft. Sliding plates are fixedly mounted at both ends of the baffle plate, and the sliding plates slide up and down within the baffle bracket. A connecting plate is fixedly mounted on one of the sliding plates, and a first tooth is provided on the connecting plate. The baffle gear meshes with the first tooth. The baffle synchronous pulley and the intermediate synchronous pulley are connected via an intermediate transmission belt. A second intermediate synchronous pulley is coaxially connected to the intermediate synchronous pulley, and the second intermediate synchronous pulley is connected to the opening adjustment mechanism via a first transmission belt.

[0009] Furthermore, the opening adjustment device includes a mounting body, a support shaft rotatably mounted on the mounting body via a support, and an opening synchronization wheel and two opening gears fixedly mounted on the support shaft; the inner surface of the mounting body is provided with a material discharge hole, and the opening plate is provided with a clearance hole corresponding to the material discharge hole;

[0010] The mounting body is provided with a sliding groove and two rod holes communicating with the sliding groove. The sliding groove is located below the material exposure hole. The outer ends of the two rod holes pass through the side of the mounting body facing the opening gear. The opening plate is slidably installed in the sliding groove. A toothed rod is inserted into the rod hole. The inner end of the toothed rod is fixedly connected to the opening plate. A second tooth is provided on the lower side of the toothed rod. The second tooth meshes with the opening gear. The opening synchronous pulley is connected to the middle synchronous pulley through a first transmission belt.

[0011] Furthermore, the horizontal mixing mechanism includes a mixing support mounted on the frame, a horizontal plate slidably mounted on the mixing support via a sliding mechanism, several fixed cylinders fixedly disposed on the horizontal plate, a guide cylinder fixed to the side of the frame via the mixing support, a rod ring disposed on the horizontal plate near one end of the guide cylinder, a guide rod slidably passing through the guide cylinder, and a reciprocating motion mechanism connecting the main shaft and the guide rod; the material swaying bar is fixed by the fixed cylinder, and the reciprocating motion mechanism pushes the guide rod to reciprocate along the length direction of the conveyor belt; the guide rod has a straight section that cooperates with the fixed cylinder, an oblique end that cooperates with the rod ring, and a stop section that prevents the rod ring from dislodging from the end of the guide rod.

[0012] Furthermore, the unloading mechanism includes an unloading seat, a side seat fixedly installed on the side of the unloading seat, and a side shaft rotatably installed on the side seat. A worm gear and an auxiliary synchronous pulley are fixedly installed on the side shaft. The unloading impeller is rotatably installed in the unloading seat via an impeller main shaft. At least one end of the impeller main shaft extends out of the unloading seat, and the unloading synchronous pulley is fixedly installed at the end of the impeller main shaft extending out of the unloading seat. The worm gear meshes with the unloading synchronous pulley, and the auxiliary synchronous pulley is directly connected to the first synchronous pulley via a second transmission belt.

[0013] Furthermore, the rotary mixing box includes a mixing box body and a mixing chamber disposed within the mixing box body. Two meshing mixing gears are horizontally disposed within the mixing chamber, one of which is driven to rotate by a motor. Feed ports are respectively disposed on both sides of the top of the mixing box body. There are two feeding hoppers, and their bottoms are respectively connected to the two feeding ports. An outlet is disposed in the center of the lower part of the mixing chamber. A transition cylinder covers the outlet, and the opening adjustment device is connected to the lower end of the transition cylinder.

[0014] Furthermore, a vertical shaft is rotatably installed inside the transition cylinder, a power impeller is coaxially fixed at the top of the vertical shaft, and a dispersion grid is coaxially fixed at the bottom of the vertical shaft.

[0015] Furthermore, a first rake position is provided above the conveyor belt, located between the unloading position and the material thickness adjustment position. A first rake plate is provided on the first rake position. The first rake plate includes a first plate body and rake bars evenly arranged on the lower side of the first plate body. The lower end of the rake bars abuts against the upper surface of the conveyor belt.

[0016] Furthermore, a second rake position is provided above the conveyor belt, located downstream of the mixing position. A second rake plate is provided on the second rake position. The second rake plate includes a second plate body and rake holes evenly opened on the lower side of the second plate body. The lower end of the rake holes penetrates the second plate body downward.

[0017] Furthermore, a narrow-mouth device is provided on the lower side of the unloading mechanism. The narrow-mouth device includes a connecting seat, a fixed plate and a moving plate disposed on the lower side of the connecting seat. Both sides of the fixed plate and the moving plate are connected by accordion connecting pieces. The lower ends of the fixed plate, the moving plate and the two accordion connecting pieces form a narrow rectangular discharge port. A support cylinder, an adjusting rod passing through the support cylinder and a locking member for positioning the adjusting rod in the support cylinder are fixedly provided on the outer edge of the fixed plate. One end of the two adjusting rods is fixedly connected to the same support rod. The outer wall of the moving plate abuts against the support rod.

[0018] The technical solution of the present invention achieves the following beneficial technical effects:

[0019] In use, this invention involves feeding clay onto a conveyor belt and cement and stone powder into two feed hoppers. During the transportation of the clay from the stockpile to the grouting station for preparing the grouting slurry, the conveyor belt can be used to complete the mixing and pre-mixing of cement, stone powder, and clay, eliminating the need for traditional secondary slurry preparation processes and reducing the equipment cost of the grouting station. At the same time, the pre-mixing of cement, stone powder, and clay can reduce the subsequent mixing time and improve slurry preparation efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the opening adjustment device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram illustrating the cooperation between the unloading mechanism and the opening adjustment device in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the material thickness adjustment mechanism according to an embodiment of the present invention;

[0024] Figure 5 This is a top view of the transverse mixing mechanism according to an embodiment of the present invention.

[0025] The reference numerals in the figure are as follows: 1-conveyor belt, 10-frame, 11-main shaft, 12-first synchronous pulley, 14-first rake plate, 15-second rake plate; 16-first transmission belt, 17-intermediate transmission belt, 18-second transmission belt;

[0026] 21-Turn plate, 22-Column bar, 23-Connecting rod, 24-Connector, 25-Straight section, 26-Guide cylinder, 27-Angled end, 28-Rod ring, 29-Horizontal plate, 30-Mixing bracket, 31-Sliding mechanism, 32-Fixed cylinder, 33-Scratching bar; 40-Block mounting plate, 41-Block plate, 411-Sliding plate, 412-Adjusting screw, 42-Guide plate, 43-Block bracket, 44-Adjusting nut, 45-Handle, 46-First tooth, 47-Block gear, 48-Block synchronous pulley, 49-Intermediate synchronous pulley;

[0027] 50-Mounting body, 51-Support, 52-Opening timing pulley, 53-Opening gear, 54-Gear bar, 55-Exposure hole, 56-Opening plate,

[0028] 61-Discharge impeller, 62-Side seat, 63-Worm, 64-Discharge timing wheel, 65-Impeller main shaft, 66-Side shaft, 67-Auxiliary timing wheel;

[0029] 70-Transition cylinder, 71-Power impeller, 72-Inner frame, 73-Dispersed grid;

[0030] 81-Mixed gear, 82-Feed hopper, 83-Feeding port;

[0031] 91-Moving plate, 92-Fixed plate, 93-Bellis connecting piece, 94-Support cylinder, 95-Adjusting rod, 96-Support rod. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] like Figures 1 to 5 As shown, the cement-stone powder-clay composite grouting material premixing device includes a belt conveyor, multiple feed hoppers 82, and a rotary mixing box, a transition cylinder 70, an opening adjustment device, and a discharge mechanism arranged sequentially below the feed hoppers 82. The belt conveyor includes a frame 10, a conveyor belt 1, and a main shaft 11 arranged at one end of the conveyor belt 1. The discharge port of the discharge mechanism is directly opposite the conveyor belt 1, and the position where the material falls on the conveyor belt 1 is designated as the discharge position. Above the conveyor belt 1, there is a material thickness adjustment position upstream of the discharge position and a mixing position downstream of the discharge position. The material thickness adjustment position is equipped with a material thickness adjustment mechanism for adjusting the thickness of the material on the conveyor belt 1, and the mixing position is equipped with a transverse mixing mechanism for mixing the material along the width direction of the conveyor belt 1.

[0034] The opening adjustment device includes a horizontally movable opening plate 56 and an opening adjustment mechanism; the unloading mechanism includes an unloading impeller 61 and an unloading synchronous wheel 64 coaxially arranged with the unloading impeller 61; the material thickness adjustment device includes a vertically movable baffle plate 41 and a first adjustment mechanism for adjusting the height of the baffle plate 41; the cross mixing mechanism includes a scrambling bar 33 that moves regularly across the surface of the conveyor belt 1.

[0035] The first adjustment mechanism is connected to the opening adjustment mechanism via the first transmission belt 16, so that the operation of the first adjustment mechanism can realize the translation of the opening plate 56; the main shaft 11 of the conveyor is provided with a first synchronous pulley 12, and the unloading synchronous pulley 64 is connected to the first synchronous pulley 12 via the second transmission belt 18, so that the rotation speed of the unloading impeller 61 is positively correlated with the conveying speed of the conveyor belt 1.

[0036] like Figures 1 to 3 As shown, the first adjustment mechanism includes a baffle mounting plate 40, a baffle bracket 43 laterally clamped on the frame 10, an adjusting nut 44 located at the upper center of the baffle bracket 43, an adjusting screw 412 meshing with the adjusting nut 44, a handle 45 fixedly mounted on the top of the adjusting screw 412, a mounting base fixedly mounted at the top center of the baffle plate 41, an intermediate synchronous pulley 49 and an intermediate transmission belt 17 located on the side of the frame 10, the bottom end of the adjusting screw 412 being rotatably connected to the mounting base, and a baffle gear 47 and a baffle synchronous pulley 48 coaxially mounted on one of the baffle mounting plates 40 via a baffle rotating shaft; sliding plates 411 are fixedly provided at both ends of the baffle plate 41. 11. The material stop bracket 43 slides up and down. A connecting plate 91 is fixedly installed on a sliding plate 411. The connecting plate 91 is provided with a first tooth 46. The material stop gear 47 meshes with the first tooth 46. The material stop synchronous wheel 48 and the intermediate synchronous wheel 49 are connected by an intermediate transmission belt 17. The intermediate synchronous wheel 49 is coaxially connected to a secondary synchronous wheel. The secondary synchronous wheel is connected to the opening adjustment mechanism by a first transmission belt 16. Thus, by adjusting the height of the material stop plate 41, the first tooth 56 can be moved up and down synchronously. Then, the opening adjustment mechanism is adjusted by the material stop gear 47, the material stop synchronous wheel 8, the intermediate synchronous wheel 49, and the secondary synchronous wheel. That is, adjusting the material stop plate 41 can simultaneously adjust the opening of the opening plate 56.

[0037] Preferably, the baffle bracket 43 is further provided with a pair of guide plates 42 facing upstream of the conveyor belt 1. The guide plates 42 are funnel-shaped and are used to organize the material on the conveyor belt 1 into a fixed width, which is less than the length of the baffle plate 41. In use, the conveyor belt 1 is used to transport clay, and cement and stone powder are respectively put into the two feed bins. Since the guide plates 42 limit the width of the clay transported on the conveyor belt 1, and the baffle plate 41 limits the thickness of the clay transported on the conveyor belt 1, the volume of clay transported on the conveyor belt 1 per unit time is fixed. The change in the height of the baffle plate 1 will cause the change in the opening of the opening plate 56, which will cause the change in the output volume of the clay-cement mixture. The falling cement-stone powder mixture will finally fall on the clay spread flat on the conveyor belt 1, thereby realizing the ratio of cement-stone powder mixture to clay. The traditional secondary pulping process is no longer used, which can reduce the equipment cost of the pulping station. At the same time, premixing cement, stone powder and clay can also reduce the subsequent mixing time and improve pulping efficiency.

[0038] like Figures 1 to 3 As shown, the opening adjustment device includes a mounting body 50, a support shaft rotatably mounted on the mounting body 50 via a support 51, and an opening synchronization wheel 52 and two opening gears 53 fixedly mounted on the support shaft; the inner surface of the mounting body 50 is provided with a material discharge hole 55, and the opening plate 56 is provided with a clearance hole corresponding to the material discharge hole 55.

[0039] The mounting body 50 has a sliding groove and two rod holes communicating with the sliding groove. The sliding groove is located below the material exposure hole 55. The outer ends of the two rod holes penetrate the side of the mounting body 50 facing the opening gear 53. The opening plate 56 is slidably installed in the sliding groove. A toothed rod 54 passes through the rod hole. The inner end of the toothed rod 54 is fixedly connected to the opening plate 56. A second tooth is provided on the lower side of the toothed rod 54. The second tooth meshes with the opening gear 53. The opening synchronous pulley 52 is connected to the intermediate synchronous pulley through the first transmission belt 16.

[0040] When the baffle plate 41 moves upward, the connecting plate 91 moves upward synchronously. The first gear drives the baffle gear 47 to rotate. The power is transmitted sequentially through the baffle synchronous pulley 48, the intermediate transmission belt 17, the intermediate synchronous pulley 49, the intermediate second synchronous pulley, and the first transmission belt 16 to the opening synchronous pulley 52. ​​The rotation of the opening synchronous pulley 52 drives the opening gear 53 to rotate, thereby driving the gear bar 54. The gear bar 54 pushes the opening plate 56 to increase the overlap between the clearance hole and the material exposure hole 55, increasing the clearance of the material exposure hole 55 on the mounting body 50, increasing the exposure degree of the material exposure hole 55, and thus increasing the material discharge of the opening adjustment device. The first transmission belt 16 uses a round synchronous belt, which allows for lateral misalignment between the opening adjustment mechanism and the intermediate second synchronous pulley. Depending on the actual situation, guide wheels can also be added around the first transmission belt 16 to guide the round synchronous belt, so as to achieve a better transmission effect of the round synchronous belt.

[0041] Preferably, the sliding direction of the opening plate 56 is the same as the axial direction of the discharge impeller 61. This ensures that when material is discharged into the discharge impeller 61, it falls evenly into the space between each discharge impeller 61.

[0042] like Figure 1 , Figure 5 As shown, the horizontal mixing mechanism includes a mixing support 30 mounted on the frame 10, a horizontal plate 29 slidably mounted on the mixing support 30 via a sliding mechanism 31, a plurality of fixed cylinders 32 fixedly disposed on the horizontal plate 29, a guide cylinder 26 fixed to the side of the frame 10 via the mixing support, a rod ring 28 disposed on the horizontal plate 29 near the guide cylinder 26, a guide rod slidably passing through the guide cylinder 26, and a reciprocating motion mechanism connecting the main shaft 11 and the guide rod; the material swaying bar 33 is fixed by the fixed cylinder 32, and the reciprocating motion mechanism pushes the guide rod to reciprocate along the length direction of the conveyor belt 1; the guide rod has a straight section 25 that cooperates with the fixed cylinder 32, an oblique end 27 that cooperates with the rod ring 28, and a stop section to prevent the rod ring 28 from dislodging from the end of the guide rod;

[0043] As the main shaft 11 rotates and the reciprocating motion mechanism moves, the guide rod moves back and forth, thereby driving the horizontal plate 29 and the material stirring rod 33 on it to move back and forth along the width direction of the conveyor belt 1 through the rod ring 28, so as to agitate and mix the first material conveyed on the conveyor belt 1 and the second material falling from the unloading mechanism on its upper surface; in this embodiment, the stirring rod 33 realizes the agitation and mixing of the clay conveyed on the conveyor belt 1 and the cement-stone powder mixture unloaded by the unloading mechanism.

[0044] like Figure 1 , Figure 5As shown, the reciprocating motion mechanism includes a rotating plate 21 coaxially mounted on the main shaft 11, a column 22 fixedly mounted on the rotating plate 21 near the outer edge, a connecting rod 23 rotatably mounted on the column 22, and a connecting member 24 for connecting to the guide rod at the other end of the connecting rod 23. The connecting member 24 can be a ball joint connector 24 or a hinged connector 24. When the rotating plate 21 rotates, it pushes the guide rod to reciprocate within the guide cylinder 26 through the connecting rod 23, thereby causing the guide rod to reciprocate. This allows the rod ring 28 mounted on the inclined end 27 to drive the horizontal plate 29 and the material swaying rod 33 to reciprocate in the width direction of the conveyor belt 1, thereby achieving the stirring and mixing of materials on the conveyor belt 1.

[0045] It should be noted that, Figures 2 to 3 Only the unloading impeller 61 and other power transmission-related structures are schematically shown; other structures such as the unloading seat are not shown. The unloading mechanism includes an unloading seat, a side seat 62 fixedly mounted on the side of the unloading seat, and a side shaft 66 rotatably mounted on the side seat 62. A worm gear 63 and an auxiliary synchronous pulley 67 are fixedly mounted on the side shaft 66. The unloading impeller 61 is rotatably mounted in the unloading seat via an impeller main shaft 65. At least one end of the impeller main shaft 65 extends out of the unloading seat, and the unloading synchronous pulley 64 is fixedly mounted on the end of the impeller main shaft 65 that extends out of the unloading seat. The worm gear 63 meshes with the unloading synchronous pulley 64, and the auxiliary synchronous pulley 67 is directly connected to the first synchronous pulley 12 via a second transmission belt 18.

[0046] The power of the main shaft 11 of the conveyor is transmitted sequentially through the first synchronous pulley 12, the second transmission belt 18, the auxiliary synchronous pulley 67, the side shaft 66, and the worm gear 63 to the unloading synchronous pulley 64, thereby driving the unloading impeller 61 to rotate and rotate simultaneously. As a result, the unloading speed of the unloading mechanism is automatically adjusted according to the adjustment of the conveyor. When the conveying speed of the conveyor increases, the unloading speed of the unloading mechanism also increases, so that the clay conveyed by the conveyor and the cement-stone powder mixture unloaded by the unloading mechanism increase synchronously.

[0047] like Figure 1 As shown, the rotary mixing box includes a mixing box body and a mixing chamber disposed within the mixing box body. Two meshing mixing gears 81 are horizontally disposed within the mixing chamber, one of which is driven to rotate by a motor. Feed ports 83 are respectively disposed on both sides of the top of the mixing box body. There are two feeding bins 82, and their bottoms are respectively connected to the two feeding ports 83. An outlet is disposed in the center of the lower part of the mixing chamber. A transition cylinder 70 covers the outlet. The opening adjustment device is connected to the lower end of the transition cylinder 70.

[0048] The motor drives one mixing gear 81 to rotate, and the other mixing gear 81 is driven. The two mixing gears 81 rotate in opposite directions, which drives the material entering from the two feeding ports 83 to rotate and collide at the bottom of the mixing chamber to achieve mixing. After that, the material falls into the opening adjustment device through the transition cylinder 70. In this embodiment, cement and stone powder are respectively fed into two feeding bins, and then driven by the mixing gears 81 to converge and collide together in the middle of the mixing chamber to achieve mixing.

[0049] Based on the above embodiments, such as Figure 1 As shown, a vertical shaft is rotatably installed inside the transition cylinder 70, a power impeller 71 is coaxially fixed at the top of the vertical shaft, and a dispersion grid 73 is coaxially fixed at the bottom of the vertical shaft.

[0050] The middle part of the vertical shaft is installed by an inner frame 72 fixedly set on the inner wall of the transition cylinder 70; the outer circumference of the dispersing grid 73 is circular; the material thrown out by the mixing gear 81 drives the power impeller 71 to rotate, causing the dispersing grid 73 to rotate. The dispersing grid 73 is provided with a square grid inside. During the rotation of the dispersing grid 73, the square grid changes position and disperses and mixes the material passing through it again; in this embodiment, the cement and stone powder that are gathered and mixed by the two mixing gears 81 are dispersed in the transition cylinder 70 to achieve the mixing of cement and stone powder.

[0051] like Figure 1 , Figure 5 As shown, a first rake position is provided above the conveyor belt 1 between the unloading position and the material thickness adjustment position. A first rake plate 14 is provided on the first rake position. The first rake plate 14 includes a first plate body and rake bars evenly arranged on the lower side of the first plate body. The lower end of the rake bars abuts against the upper surface of the conveyor belt 1.

[0052] The cross-section of the rake bar is circular, triangular, or narrow rectangular. The purpose of setting the rake bar is to rake out grooves from the original uniform thickness of the first material, so that the second material falling in the unloading mechanism can be mixed into the lower layer of the first material, rather than just falling on the surface of the first material. This makes it easier to mix clay, stone powder, and cement evenly when the subsequent agitation bar 33 stirs the mixture.

[0053] like Figure 5 As shown, a second rake position is provided above the conveyor belt 1, located downstream of the mixing position. A second rake plate 15 is provided on the second rake position. One end of the second rake plate 15 is fixed on the guide cylinder 26. The second rake plate 15 includes a second plate body and rake holes evenly opened on the lower side of the second plate body. The lower end of the rake holes penetrates the second plate body downward.

[0054] The rake hole is a rectangular, triangular, or trapezoidal hole. The rake hole is used to divide the material that has been disturbed by the mixing mechanism into uniform strips before it continues to be conveyed. The material strips drawn by the rake hole are misaligned with the material strips drawn by the rake bar, so that the material is re-divided and piled up during the rake process, which is equivalent to a mixing. The second plate is also provided with an overflow elongated hole above the rake hole. When too much material accumulates on the back side of the second plate, it can overflow downstream from the overflow elongated hole to continue transportation.

[0055] As a further improvement to the above embodiments, such as Figure 1 As shown, a narrow-mouth device is provided on the lower side of the unloading mechanism. The narrow-mouth device includes a connecting seat, a fixed plate 92 and a moving plate 91 disposed on the lower side of the connecting seat. Both sides of the fixed plate 92 and the moving plate 91 are connected by accordion connecting pieces 93. The lower ends of the fixed plate 92, the moving plate 91 and the two accordion connecting pieces 93 form a narrow rectangular discharge port. A support cylinder 94, an adjusting rod 95 passing through the support cylinder 94 and a locking member for positioning the adjusting rod 95 in the support cylinder 94 are fixedly provided on the outer edge of the fixed plate 92. One end of the two adjusting rods 95 is fixedly connected to the same support rod 96. The outer wall of the moving plate 91 abuts against the support rod 96. By adjusting the extension length of the adjusting rod 95 within the support cylinder 94, the degree of inclination of the moving plate 91 can be adjusted, thereby adjusting the width of the narrow rectangular discharge port to regulate the falling speed of the material. Simultaneously, the falling material is concentrated into a rectangular shape, ensuring that the material is evenly distributed along the width direction of the conveyor belt 1, achieving the purpose of uniform proportioning. In this embodiment, by adjusting the width of the narrow rectangular discharge port, the proportion of cement-stone powder mixture to clay can be controllably changed.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A premixing device for cement-stone powder-clay composite grouting material, characterized in that, The system includes a belt conveyor, multiple feed bins (82), and a rotary mixing box, a transition cylinder (70), an opening adjustment device, and a discharge mechanism arranged sequentially on the lower side of the feed bins (82). The belt conveyor includes a frame (10), a conveyor belt (1), and a main shaft (11) arranged at one end of the conveyor belt (1). The discharge port of the discharge mechanism is directly opposite the conveyor belt (1), and the position where the material falls on the conveyor belt (1) is designated as the discharge position. Above the conveyor belt (1) are a material thickness adjustment position located upstream of the discharge position and a mixing position located downstream of the discharge position. The material thickness adjustment position is equipped with a material thickness adjustment mechanism for adjusting the thickness of the material on the conveyor belt (1), and the mixing position is equipped with a transverse mixing mechanism for mixing the material along the width direction of the conveyor belt (1). The opening adjustment device includes a horizontally movable opening plate (56) and an opening adjustment mechanism; the unloading mechanism includes an unloading impeller (61) and an unloading synchronous wheel (64) coaxially arranged with the unloading impeller (61); the material thickness adjustment mechanism includes a baffle plate (41) that moves up and down and a first adjustment mechanism for adjusting the height of the baffle plate (41); the cross mixing mechanism includes a scrambling bar (33) that moves regularly across the surface of the conveyor belt (1). The first adjustment mechanism is connected to the opening adjustment mechanism via the first transmission belt (16), so that the first adjustment mechanism can move the opening plate (56) by translation. The main shaft (11) of the belt conveyor is provided with a first synchronous pulley (12), and the unloading synchronous pulley (64) is connected to the first synchronous pulley (12) via the second transmission belt (18), so that the rotation speed of the unloading impeller (61) is positively correlated with the conveying speed of the conveyor belt (1).

2. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, The first adjustment mechanism includes a baffle mounting plate (40), a baffle bracket (43) laterally clamped on the frame (10), an adjusting nut (44) located at the center of the upper part of the baffle bracket (43), an adjusting screw (412) meshing with the adjusting nut (44), a handle (45) fixedly installed on the top of the adjusting screw (412), a mounting base fixedly installed at the center of the top of the baffle plate (41), an intermediate synchronous pulley (49) and an intermediate transmission belt (17) located on the side of the frame (10). The bottom end of the adjusting screw (412) is rotatably connected to the mounting base. A baffle mounting plate (40) is coaxially mounted with a baffle shaft. The material blocking gear (47) and the material blocking synchronous pulley (48) are provided; the two ends of the material blocking plate (41) are fixedly provided with sliding plates (411), the sliding plates (411) slide up and down in the material blocking bracket (43), a connecting plate (91) is fixedly provided on one of the sliding plates (411), the connecting plate (91) is provided with a first tooth (46), the material blocking gear (47) meshes with the first tooth (46); the material blocking synchronous pulley (48) and the intermediate synchronous pulley (49) are connected through an intermediate transmission belt (17); the intermediate synchronous pulley (49) is coaxially connected with a middle two synchronous pulley, and the middle two synchronous pulley is connected to the opening adjustment mechanism through a first transmission belt (16).

3. The cement-stone powder-clay composite grouting material premixing device according to claim 2, characterized in that, The opening adjustment device includes a mounting body (50), a support shaft rotatably mounted on the mounting body (50) via a support (51), an opening synchronization wheel (52) fixedly mounted on the support shaft, and two opening gears (53); the inner surface of the mounting body (50) is provided with a material discharge hole (55), and the opening plate (56) is provided with a clearance hole corresponding to the material discharge hole (55); The mounting body (50) is provided with a sliding groove and two rod holes communicating with the sliding groove. The sliding groove is located below the material discharge hole (55). The outer ends of the two rod holes pass through the side of the mounting body (50) facing the opening gear (53). The opening plate (56) is slidably installed in the sliding groove. A toothed rod (54) is inserted in the rod hole. The inner end of the toothed rod (54) is fixedly connected to the opening plate (56). A second tooth is provided on the lower side of the toothed rod (54). The second tooth meshes with the opening gear (53). The opening synchronous pulley (52) is connected to the middle synchronous pulley through the first transmission belt (16).

4. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, The horizontal mixing mechanism includes a mixing bracket (30) mounted on the frame (10), a horizontal plate (29) slidably mounted on the mixing bracket (30) via a sliding mechanism (31), a plurality of fixed cylinders (32) fixedly mounted on the horizontal plate (29), a guide cylinder (26) fixed to the side of the frame (10) via the mixing bracket, a rod ring (28) disposed on the horizontal plate (29) near the guide cylinder (26), a guide rod slidably passing through the guide cylinder (26), and a reciprocating motion mechanism connecting the main shaft (11) and the guide rod; the material bar (33) is fixed by the fixed cylinder (32), and the reciprocating motion mechanism pushes the guide rod to reciprocate along the length direction of the conveyor belt (1); the guide rod has a straight section (25) that cooperates with the fixed cylinder (32), an oblique end (27) that cooperates with the rod ring (28), and a stop section that prevents the rod ring (28) from coming off the end of the guide rod.

5. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, The unloading mechanism includes an unloading seat, a side seat (62) fixedly installed on the side of the unloading seat, and a side shaft (66) rotatably installed on the side seat (62). A worm gear (63) and an auxiliary synchronous wheel (67) are fixedly installed on the side shaft (66). The unloading impeller (61) is rotatably installed in the unloading seat through an impeller main shaft (65). At least one end of the impeller main shaft (65) extends out of the unloading seat, and the unloading synchronous wheel (64) is fixedly installed at the end of the impeller main shaft (65) that extends out of the unloading seat. The worm gear (63) meshes with the unloading synchronous wheel (64), and the auxiliary synchronous wheel (67) is directly connected to the first synchronous wheel (12) through a second transmission belt (18).

6. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, The rotary mixing chamber includes a mixing chamber body and a mixing cavity disposed within the mixing chamber body. Two meshing mixing gears (81) are horizontally disposed within the mixing cavity. One of the mixing gears (81) is driven to rotate by a motor. Feed ports (83) are respectively disposed on both sides of the top of the mixing chamber body. There are two feeding bins (82) and their bottoms are respectively connected to the two feeding ports (83). An outlet is disposed in the center of the lower part of the mixing cavity. A transition cylinder (70) covers the outlet. The opening adjustment device is connected to the lower end of the transition cylinder (70).

7. The cement-stone powder-clay composite grouting material premixing device according to claim 6, characterized in that, A vertical shaft is rotatably installed inside the transition cylinder (70), a power impeller (71) is coaxially fixed at the top of the vertical shaft, and a dispersion grid (73) is coaxially fixed at the bottom of the vertical shaft.

8. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, A first rake position is provided above the conveyor belt (1) between the unloading position and the material thickness adjustment position. A first rake plate (14) is provided on the first rake position. The first rake plate (14) includes a first plate body and rake bars evenly arranged on the lower side of the first plate body. The lower end of the rake bars abuts against the upper surface of the conveyor belt (1).

9. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, A second rake position is provided above the conveyor belt (1) and located downstream of the mixing position. A second rake plate (15) is provided on the second rake position. The second rake plate (15) includes a second plate body and rake holes evenly opened on the lower side of the second plate body. The lower end of the rake holes penetrates the second plate body downward.

10. The cement-stone powder-clay composite grouting material premixing device according to claim 1, characterized in that, The unloading mechanism is provided with a narrow-mouth device on its lower side. The narrow-mouth device includes a connecting seat, a fixed plate (92) and a moving plate (91) provided on the lower side of the connecting seat. Both sides of the fixed plate (92) and the moving plate (91) are connected by accordion connecting pieces (93). The lower ends of the fixed plate (92), the moving plate (91) and the two accordion connecting pieces (93) form a narrow rectangular discharge port. A support cylinder (94), an adjusting rod (95) passing through the support cylinder (94), and a locking member for positioning the adjusting rod (95) in the support cylinder (94) are fixedly provided at the outer edge of the fixed plate (92). One end of the two adjusting rods (95) is fixedly connected to the same support rod (96). The outer wall of the moving plate (91) abuts against the support rod (96).

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