Fine sand supply device and accelerated polishing machine

Abstract

The utility model relates to the technical field of accelerated polishing machines, in particular to a fine sand supply device which comprises a V-shaped sand storage box body, the bottom of the V-shaped sand storage box body is of an arc structure, a sand outlet hole is formed in the bottom of the V-shaped sand storage box body, a stirring rod assembly is arranged in an inner cavity of the V-shaped sand storage box body in a penetrating mode, and a sand outlet hole is formed in the inner cavity of the V-shaped sand storage box body. A fine sand conveying belt assembly is arranged below the V-shaped sand storage box body and comprises a fixing frame, a driving roller and a driven roller, the driving roller and the driven roller are rotationally connected to the two ends of an inner cavity of the fixing frame, a conveying belt is connected between the driving roller and the driven roller, and one end of the driving roller is connected with a rotary driving device. A power transmission assembly is connected between the other end of the driving roller and the stirring rod assembly; the bottom of the V-shaped sand storage box body is connected with a manual flow control valve assembly, and the fine sand conveying belt assembly is connected with an aggregate paving assembly. The fine sand conveying device is reasonable in structure, fine sand can be smoothly and uniformly conveyed to the rubber wheel, the using effect is enhanced, and the testing precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of accelerated polishing machines, in particular to a fine sand supply device and an accelerated polishing machine. Background Art

[0002] The accelerated polishing machine is a test equipment that uses water and corundum to polish the specimens made of aggregate particles indoors to simulate the polishing effect of automobile tires on the road surface. Its working principle is to produce according to the method specified in the JTG3432-2024 test procedure and the requirements of the JJG (Traffic) 054-2023 accelerated polishing machine verification procedure. The manufactured specimen is installed on the road wheel of the polishing machine, and the rubber wheel is pressed forward. By adding water and coarse and fine corundum, the specimen is rotated and polished at a certain load and time to simulate the polishing effect of coarse aggregate used in asphalt pavement when the wheel is running. When adding fine sand to the rubber wheel, a sand supply device is required. The sand supply device evenly transfers the fine sand to the rubber wheel, so that the sand delivery amount of fine sand should be controlled within the range of 3±1g / min.

[0003] With respect to the above-mentioned related technologies, the inventors found that in order to meet the measurement needs, the particle size of the fine sand needs to be adjusted from 280 mesh to a smaller 400 mesh. The fine sand is green silicon carbide powder, but the size of the discharge hole of the fine sand supply device is constant. Due to the small particle size of the fine sand and the humid environment causing the fine sand to agglomerate, the fine sand is blocked in the discharge hole of the sand supply device, resulting in poor stability of the fine sand delivery amount, reducing the use effect, and the process of the fine sand falling is in a loose state, so that part of the fine sand falls on the outside of the rubber wheel, and the fine sand output by the fine sand supply device cannot be fully utilized, reducing the accuracy of the test. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a fine sand supply device, so that the fine sand can be smoothly and evenly transmitted to the rubber wheel, thereby enhancing the use effect and improving the test accuracy.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a fine sand supply device, comprising: a V-shaped sand storage box, the bottom of the V-shaped sand storage box is an arc structure, the bottom of the V-shaped sand storage box is provided with a sand outlet hole, the inner cavity of the V-shaped sand storage box is penetrated by a stirring rod assembly, a fine sand conveyor belt assembly is provided below the V-shaped sand storage box, the fine sand conveyor belt assembly comprises a fixed frame, an active roller and a driven roller rotatably connected to both ends of the inner cavity, a conveyor belt is connected between the active roller and the driven roller, one end of the active roller is connected to a rotary drive device, and the other end of the active roller and the stirring rod assembly are connected to a power transmission assembly;

[0006] The bottom of the V-shaped sand storage box is connected to a manual flow control valve assembly, which is suitable for adjusting the flow rate of fine sand between the sand outlet and the conveyor belt;

[0007] The fine sand conveyor belt assembly is connected to an aggregate spreading assembly, which is suitable for collecting and leveling the fine sand on the conveyor belt toward the middle.

[0008] By adopting the above technical scheme, when in use, the fine sand is contained in the V-shaped sand storage box, the rotary drive device drives the active roller to rotate, the active roller drives the stirring rod assembly to rotate through the power transmission assembly, and the stirring rod assembly stirs the fine sand in the V-shaped sand storage box, thereby reducing the probability of agglomeration of the fine sand due to factors such as reduced particle size and moisture, so that the fine sand can flow smoothly from the sand outlet hole to the transmission surface of the conveyor belt. By adjusting the manual flow control valve assembly, the amount of fine sand falling on the conveyor belt per unit time is matched with the transmission speed of the conveyor belt, thereby ensuring that the sand delivery amount of the fine sand supply device of the present application is controlled within 3±1 g / min range, reduces the probability of fine sand being blocked in the sand outlet holes of the sand supply device, enhances the stability of the fine sand delivery amount, and improves the use effect. After the fine sand in the V-shaped sand storage box falls onto the conveyor belt through the sand outlet holes, the conveyor belt drives the fine sand to move horizontally. Through the action of the aggregate spreading assembly, the fine sand near the side edge of the conveyor belt is guided to move toward the middle, and the fine sand is flattened in the process of moving to the middle. In this way, the looseness of the fine sand in the falling process can be reduced, which facilitates the fine sand to fall on the outer circle of the rubber wheel. The fine sand output by the fine sand supply device can be fully utilized, thereby improving the accuracy of the test.

[0009] In a preferred example, the utility model can be further configured as follows: the manual flow control valve assembly includes an arc-shaped shell connected to the outer surface of the lower end of the V-shaped sand storage box body, an L-shaped plate is passed through one end of the arc-shaped shell, a waist-shaped hole is provided on the L-shaped plate below the sand outlet hole, a bottom hole is provided at the bottom of the arc-shaped shell directly below the sand outlet hole, and also includes a driving rod for driving the L-shaped plate to slide horizontally.

[0010] By adopting the above technical solution, the driving rod is operated to drive the L-shaped plate to move horizontally. When the waist-shaped hole and the sand outlet hole are completely overlapped, the speed at which fine sand flows out of the V-shaped sand storage box is the largest. As the waist-shaped hole and the sand outlet hole are gradually staggered, the speed at which fine sand flows out gradually decreases. This makes it convenient to adjust the speed at which fine sand flows out of the V-shaped sand storage box by controlling the overlap between the waist-shaped hole and the sand outlet hole, thereby improving the convenience of operation.

[0011] In a preferred example, the utility model can be further configured as follows: the driving rod includes a screw rod and a fixing plate connected to the outer surface of the bottom of the V-shaped sand storage box body, the screw rod is spirally penetrated through the vertical side of the L-shaped plate, one end of the screw rod passes through the fixing plate, and the other end is connected to a circular knob, the screw rod is connected to limit nuts located on both sides of the fixing plate at intervals, the screw rod is spirally connected to a locking nut, and the locking nut is in contact with the outer surface of the vertical side of the L-shaped plate.

[0012] By adopting the above technical solution, since the screw and the L-shaped plate are threadedly connected, rotating the circular knob drives the screw to rotate, and the screw drives the L-shaped plate to move, that is, the overlap between the waist-shaped hole and the sand outlet hole is adjusted, and the sand outlet amount of the sand outlet hole on the V-shaped sand storage box is controlled.

[0013] In a preferred example, the utility model can be further configured as follows: the power transmission component includes a driving sprocket and a driven sprocket, a chain is connected between the driving sprocket and the driven sprocket, the driving sprocket is sleeved and connected to the outer circle of the end of the driving roller away from the rotating drive device, and the driven sprocket is sleeved and connected to the outer circle of one end of the stirring rod assembly.

[0014] By adopting the above technical solution, the rotating active sprocket drives the driven sprocket to rotate through the chain, and the driven sprocket drives the stirring rod assembly to rotate.

[0015] In a preferred example, the utility model can be further configured as follows: the aggregate spreading assembly includes two symmetrically arranged L-shaped baffles, the inner side edge of the L-shaped baffle is provided with a material guiding inclined edge close to one end of the V-shaped sand storage box body, the L-shaped baffle is connected to the outer side surface of the fixed frame by bolts, the upper planes of the two L-shaped baffles are detachably connected with a spreading plate, and the side edge of the spreading plate close to the V-shaped sand storage box body is connected with an inclined guide plate.

[0016] By adopting the above technical solution, the conveyor belt drives the fine sand to move. When the fine sand passes through the symmetrically arranged L-shaped baffles, the inclined edge of the material guide guides the fine sand near the side of the conveyor belt to move to the middle, so as to achieve the purpose of aggregation. Through the action of the inclined guide plate, part of the fine sand is prevented from flowing to the upper plane of the spreading plate. The spreading plate spreads the transmitted fine sand, so that the fine sand after passing through the aggregate spreading assembly is in the shape of a long strip pile, which reduces the looseness of the fine sand when falling.

[0017] In a preferred example, the utility model can be further configured as follows: the stirring rod assembly includes a rotating shaft and a plurality of stirring rod bodies, the stirring rod bodies are connected to the outer circle of the rotating shaft at intervals, and the rotating shaft passes through the inner cavity of the V-shaped sand storage box body and is rotatably connected thereto.

[0018] By adopting the above technical solution, the active roller drives the rotating shaft to rotate through the power transmission component, and the rotating shaft drives a plurality of stirring rod bodies to rotate. The stirring rod bodies break up the agglomerated fine sand so that the fine sand can flow out smoothly through the sand outlet hole.

[0019] In a preferred example, the utility model can be further configured as follows: the front and rear sides of the V-shaped sand storage box are respectively connected with connecting plates, the connecting plates are respectively provided with a plurality of open grooves at intervals, the open grooves are respectively provided with bolts, and the bolts are spirally penetrated on the fixing frame.

[0020] By adopting the above technical solution, the connecting plate is connected to the fixing frame by bolts, so that the V-shaped sand storage box is indirectly fixedly connected to the fixing frame. Since the bolts can move in the open groove, the distance between the V-shaped sand storage box and the transmission surface of the fine sand conveyor belt assembly can be easily adjusted.

[0021] In a preferred example, the utility model can be further configured as follows: at least two fixing rod assemblies are spaced apart and connected to one side of the fixing frame, the fixing rod assembly includes a fixing block and a fixing rod body penetrated on the fixing block, a plurality of mounting holes are spaced apart on the fixing block, an end portion of the fixing rod body is connected to the fixing frame, a locking screw is spirally penetrated on the fixing block, and an end portion of the locking screw is tightly connected to the fixing rod body.

[0022] By adopting the above technical solution, the fixed block is connected to the accelerated polishing machine through bolts, and the fixed block is indirectly fixedly connected to the fixed frame through the fixed rod body, so that the fixed frame is indirectly fixedly connected to the accelerated polishing machine.

[0023] The embodiment of the utility model further provides an accelerated polishing machine, characterized in that it comprises the fine sand supply device.

[0024] By adopting the above technical scheme and utilizing the fine sand supply device of the utility model, when the accelerated polishing machine is working, the sand supply amount of 400-mesh fine sand is controlled within the range of 3±1g / min, and the fine sand falls smoothly on the outer circle of the rubber wheel. The fine sand output by the fine sand supply device can be fully utilized, thereby improving the test accuracy.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects:

[0026] 1. The rotating active roller drives the stirring rod assembly to rotate through the power transmission assembly. The stirring rod assembly breaks up the 400-mesh fine sand agglomerates in the V-shaped sand storage box, so that the fine sand can flow out smoothly from the sand outlet hole, thereby improving the working stability of the fine sand supply device of the present application.

[0027] 2. Operate the driving rod to drive the L-shaped plate to move horizontally. When the waist-shaped hole and the sand outlet hole are completely overlapped, the speed at which fine sand flows out of the V-shaped sand storage box is the largest. As the waist-shaped hole and the sand outlet hole are gradually staggered, the speed at which fine sand flows out gradually decreases. This makes it convenient to adjust the speed at which fine sand flows out of the V-shaped sand storage box by controlling the overlap between the waist-shaped hole and the sand outlet hole, thereby improving the convenience of operation.

[0028] 3. The conveyor belt drives the fine sand to move. When the fine sand passes through the symmetrically arranged L-shaped baffles, the inclined edge of the guide guide guides the fine sand near the side of the conveyor belt to move to the middle to achieve the purpose of aggregation. Through the action of the inclined guide plate, part of the fine sand is prevented from flowing to the upper plane of the spreading plate. The spreading plate flattens the transmitted fine sand, so that the fine sand after passing through the aggregate spreading assembly is in the shape of a long strip pile, which reduces the looseness of the fine sand when falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0030] Figure 1 It is a structural schematic diagram of a preferred embodiment of the fine sand supply device of the utility model.

[0031] Figure 2 yes Figure 1 Schematic diagram of the K-axis structure.

[0032] Figure 3 yes Figure 1 Schematic diagram of the structure of the stirring rod assembly.

[0033] Figure 4 yes Figure 1 Schematic diagram of the structure of the medium and fine sand conveyor belt assembly.

[0034] Figure 5 yes Figure 1 Schematic diagram of the structure in which the manual flow control valve assembly is connected to the V-shaped sand storage box.

[0035] Figure 6 yes Figure 1 Schematic diagram of the structure connecting the medium aggregate paving assembly and the fine sand conveyor belt assembly.

[0036] Figure 7 yes Figure 1 Schematic diagram of the structure of the medium V-shaped sand storage box.

[0037] Figure 8 It is a structural schematic diagram of an acceleration grinder.

[0038] In the figure: 1, V-shaped sand storage box; 2, sand outlet hole; 30, stirring rod assembly; 40, fine sand conveyor belt assembly; 50, power transmission assembly; 60, manual flow control valve assembly;

[0039] 70. Aggregate paving assembly; 8. Connecting plate; 90. Fixing rod assembly; 11. Opening slot;

[0040] 31. rotating shaft; 32. stirring rod body;

[0041] 41. fixed frame; 42. driving roller; 43. driven roller; 44. transmission belt; 45. rotation driving device;

[0042] 51. Driving sprocket; 52. Driven sprocket; 53. Chain;

[0043] 61. arc-shaped housing; 62. L-shaped plate; 63. waist-shaped hole; 64. bottom hole; 65. driving rod; 651. screw rod; 652. fixing plate; 653. round knob; 654. limiting nut; 655. anti-loosening nut;

[0044] 71. L-shaped baffle; 72. inclined guide edge; 73. spreading plate; 74. inclined guide plate;

[0045] 91. Fixing block; 92. Fixing rod; 93. Mounting hole; 94. Locking screw. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0048] Reference Figures 1 to 8 , is a fine sand supply device disclosed in the utility model, comprising: a V-shaped sand storage box body 1, the bottom of the V-shaped sand storage box body 1 is an arc structure, the bottom of the V-shaped sand storage box body 1 is provided with a sand outlet hole 2, the inner cavity of the V-shaped sand storage box body 1 is penetrated by a stirring rod assembly 30, the stirring rod assembly 30 comprises a rotating shaft 31 and a plurality of stirring rod bodies 32, the stirring rod bodies 32 are connected to the outer circle of the rotating shaft 31 at intervals, the rotating shaft 31 is penetrated in the inner cavity of the V-shaped sand storage box body 1 and is rotatably connected thereto; when the fine sand used is 400 mesh, the particle size of the fine sand is small, and due to factors such as humid weather, the fine sand in the V-shaped sand storage box body 1 is easy to agglomerate, and under the action of external force, the rotating shaft 31 drives the plurality of stirring rod bodies 32 to rotate to break up the agglomerated fine sand, so that the fine sand can flow out of the sand outlet hole 2.

[0049] A fine sand conveyor belt assembly 40 is provided below the V-shaped sand storage box 1. The fine sand conveyor belt assembly 40 includes a fixed frame 41, an active roller 42 and a driven roller 43 rotatably connected to both ends of its inner cavity, a conveyor belt 44 is connected between the active roller 42 and the driven roller 43, one end of the active roller 42 is connected to a rotation drive device 45, and the rotation drive device 45 is a servo motor. A power transmission assembly 50 is connected between the other end of the active roller 42 and the stirring rod assembly 30; the power transmission assembly 50 includes a driving sprocket 51 and a driven sprocket 52. A chain 53 is connected between the driving sprocket 51 and the driven sprocket 52. The driving sprocket 51 is sleeved and connected to the outer circle of the end of the driving roller 42 away from the rotating drive device 45, and the driven sprocket 52 is sleeved and connected to the outer circle of one end of the stirring rod assembly 30; the rotating drive device 45 drives the driving roller 42 to rotate, that is, the driving roller 42 drives the driving sprocket 51 to rotate, and the rotating driving sprocket 51 drives the driven sprocket 52 to rotate through the chain 53, and the driven sprocket 52 drives the stirring rod assembly 30 to rotate to break up the fine sand.

[0050] A manual flow control valve assembly 60 is connected to the bottom of the V-shaped sand storage box 1, which is suitable for adjusting the fine sand flow rate between the sand outlet hole 2 and the conveyor belt 44; the manual flow control valve assembly 60 includes an arc-shaped shell 61 connected to the outer surface of the lower end of the V-shaped sand storage box 1, one end of the arc-shaped shell 61 is penetrated by an L-shaped plate 62, the L-shaped plate 62 is provided with a waist-shaped hole 63 located below the sand outlet hole 2, the bottom of the arc-shaped shell 61 is provided with a bottom hole 64 located directly below the sand outlet hole 2, and also includes a driving rod 65 for driving the L-shaped plate 62 to slide horizontally; the driving rod 65 includes a screw 651 and a fixing plate 652 connected to the outer surface of the bottom of the V-shaped sand storage box 1, the screw 651 is spirally penetrated on the vertical side of the L-shaped plate 62, one end of the screw 651 passes through the fixing plate 652, and the other end is connected to a circular rotating rod. The circular knob 653 is connected to the screw rod 651 with limit nuts 654 located on both sides of the fixing plate 652 at intervals, and the limit nuts 654 prevent the screw rod 651 from detaching from the fixing plate 652. The screw rod 651 is spirally connected with a locking nut 655, and the locking nut 655 contacts the outer surface of the vertical side edge of the L-shaped plate 62; rotating the circular knob 653 drives the screw rod 651 to rotate, and the screw 651 drives the L-shaped plate 62 to move. When the waist-shaped hole 63 and the sand outlet hole 2 are completely overlapped, the speed at which the fine sand flows out of the V-shaped sand storage box body 1 is the largest. As the waist-shaped hole 63 and the sand outlet hole 2 are gradually staggered, the speed at which the fine sand flows out gradually decreases, thereby facilitating the adjustment of the speed at which the fine sand flows out of the V-shaped sand storage box body 1 by controlling the overlap between the waist-shaped hole 63 and the sand outlet hole 2, thereby improving the convenience of operation.

[0051] The fine sand conveyor belt assembly 40 is connected to an aggregate spreading assembly 70, which is suitable for collecting and flattening the fine sand on the conveyor belt 44 toward the middle; the aggregate spreading assembly 70 includes two symmetrically arranged L-shaped baffles 71, and the inner side edge of the L-shaped baffle 71 is close to one end of the V-shaped sand storage box 1 and is provided with a material guiding inclined edge 72, and the L-shaped baffle 71 is connected to the outer side of the fixing frame 41 by bolts, and the upper planes of the two L-shaped baffles 71 are detachably connected to a spreading plate 73, and the spreading plate 73 is close to the V-shaped sand storage box 1. An inclined guide plate 74 is connected to the side; the conveyor belt 44 drives the fine sand to move. When the fine sand passes through the symmetrically arranged L-shaped baffle 71, the inclined guide edge 72 guides the fine sand near the side of the conveyor belt 44 to move toward the middle, so as to achieve the purpose of aggregation. Through the action of the inclined guide plate 74, part of the fine sand is prevented from flowing to the upper plane of the spreading plate 73. The spreading plate 73 spreads the transmitted fine sand, so that the fine sand after passing through the aggregate spreading assembly 70 is in the shape of a long strip pile, which reduces the looseness of the fine sand when falling.

[0052] The front and rear sides of the V-shaped sand storage box 1 are respectively connected with connecting plates 8, and a plurality of open grooves 11 are respectively provided on the connecting plates 8 at intervals. Bolts are respectively provided in the open grooves 11, and the bolts are spirally penetrated on the fixing frame 41; the connecting plate 8 is connected to the fixing frame 41 by bolts, so that the V-shaped sand storage box 1 is indirectly fixedly connected to the fixing frame 41. Since the bolts can move in the open grooves 11, it is convenient to adjust the distance between the V-shaped sand storage box 1 and the transmission surface of the fine sand conveyor belt assembly 40.

[0053] At least two fixing rod assemblies 90 are spaced apart and connected to one side of the fixing frame 41. The fixing rod assembly 90 includes a fixing block 91 and a fixing rod body 92 passed through the fixing block 91. A plurality of mounting holes 93 are spaced apart on the fixing block 91. An end of the fixing rod body 92 is connected to the fixing frame 41. A locking screw 94 is spirally passed through the fixing block 91. An end of the locking screw 94 is tightly connected to the fixing rod body 92 to prevent the fixing block 91 and the fixing rod body 92 from axial sliding.

[0054] The accelerated polishing machine comprises the fine sand supply device described above; by utilizing the fine sand supply device of the utility model, when the accelerated polishing machine is working, the sand supply amount of 400-mesh fine sand is controlled within the range of 3±1g / min, the fine sand falls smoothly on the outer circle of the rubber wheel, and the fine sand output by the fine sand supply device can be fully utilized, thereby improving the accuracy of the test.

[0055] The implementation principle of this embodiment is as follows: when in use, fine sand is placed in the V-shaped sand storage box 1, the rotary drive device 45 drives the active roller 42 to rotate, the active roller 42 drives the stirring rod assembly 30 to rotate through the power transmission assembly 50, and the stirring rod assembly 30 stirs the fine sand in the V-shaped sand storage box 1, reducing the probability of agglomeration of fine sand due to factors such as reduced particle size and moisture, so that the fine sand can flow smoothly from the sand outlet 2 to the transmission surface of the conveyor belt 44, and the manual flow control valve assembly 60 is adjusted to make the amount of fine sand falling on the conveyor belt 44 per unit time match the transmission speed of the conveyor belt 44, thereby ensuring the sand delivery amount of the fine sand supply device of this application By controlling it within the range of 3±1g / min, the probability of fine sand being blocked in the sand outlet hole 2 of the sand supply device is reduced, the stability of the fine sand output is enhanced, and the use effect is improved. After the fine sand in the V-shaped sand storage box 1 falls onto the conveyor belt 44 through the sand outlet hole 2, the conveyor belt 44 drives the fine sand to move horizontally. Through the action of the aggregate spreading assembly 70, the fine sand near the side edge of the conveyor belt 44 is guided to move toward the middle, and the fine sand is flattened in the process of moving to the middle. In this way, the looseness of the fine sand in the falling process can be reduced, which facilitates the fine sand to fall on the outer circle of the rubber wheel. The fine sand output by the fine sand supply device can be fully utilized, thereby improving the accuracy of the test.

[0056] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Fine sand supply device, including: A V-shaped sand storage box (1), wherein the bottom of the V-shaped sand storage box (1) is an arc structure, and a sand outlet hole (2) is provided at the bottom of the V-shaped sand storage box (1), characterized in that a stirring rod assembly (30) is penetrated through the inner cavity of the V-shaped sand storage box (1), and a fine sand transmission belt assembly (40) is provided below the V-shaped sand storage box (1), wherein the fine sand transmission belt assembly (40) comprises a fixed frame (41), an active roller (42) and a driven roller (43) rotatably connected to both ends of the inner cavity thereof, a transmission belt (44) is connected between the active roller (42) and the driven roller (43), one end of the active roller (42) is connected to a rotation driving device (45), and a power transmission assembly (50) is connected between the other end of the active roller (42) and the stirring rod assembly (30); The bottom of the V-shaped sand storage box (1) is connected to a manual flow control valve assembly (60) suitable for adjusting the flow rate of fine sand between the sand outlet hole (2) and the conveyor belt (44); The fine sand conveyor belt assembly (40) is connected to an aggregate spreading assembly (70) suitable for collecting and flattening the fine sand on the conveyor belt (44) toward the middle.

2. The fine sand supply device according to claim 1, characterized in that: The manual flow control valve assembly (60) comprises an arc-shaped housing (61) connected to the outer surface of the lower end of a V-shaped sand storage box (1), an L-shaped plate (62) is passed through one end of the arc-shaped housing (61), a waist-shaped hole (63) is provided on the L-shaped plate (62) and is located below the sand outlet hole (2), a bottom hole (64) is provided at the bottom of the arc-shaped housing (61) and is located directly below the sand outlet hole (2), and a driving rod (65) is also included for driving the L-shaped plate (62) to slide horizontally.

3. The fine sand supply device according to claim 2, characterized in that: The driving rod (65) comprises a screw rod (651) and a fixing plate (652) connected to the outer surface of the bottom of the V-shaped sand storage box (1); the screw rod (651) is spirally arranged on the vertical side of the L-shaped plate (62); one end of the screw rod (651) passes through the fixing plate (652) and the other end is connected to a circular knob (653); the screw rod (651) is connected to limiting nuts (654) located on both sides of the fixing plate (652) at intervals; the screw rod (651) is spirally connected to a locking nut (655), and the locking nut (655) contacts the outer surface of the vertical side of the L-shaped plate (62).

4. The fine sand supply device according to claim 1, characterized in that: The power transmission assembly (50) comprises a driving sprocket (51) and a driven sprocket (52), a chain (53) being connected between the driving sprocket (51) and the driven sprocket (52), the driving sprocket (51) being sleevedly connected to the outer circle of the end of the driving roller (42) away from the rotating drive device (45), and the driven sprocket (52) being sleevedly connected to the outer circle of one end of the stirring rod assembly (30).

5. The fine sand supply device according to claim 1, characterized in that: The aggregate spreading assembly (70) comprises two symmetrically arranged L-shaped baffles (71), the inner side edge of the L-shaped baffle (71) close to one end of the V-shaped sand storage box (1) is provided with a material guiding inclined edge (72), the L-shaped baffle (71) is connected to the outer side surface of the fixing frame (41) by bolts, the upper planes of the two L-shaped baffles (71) are detachably connected with a spreading plate (73), and the side edge of the spreading plate (73) close to the V-shaped sand storage box (1) is connected with an inclined guide plate (74).

6. The fine sand supply device according to claim 1, characterized in that: The stirring rod assembly (30) comprises a rotating shaft (31) and a plurality of stirring rod bodies (32). The stirring rod bodies (32) are connected to the outer circle of the rotating shaft (31) at intervals. The rotating shaft (31) is inserted into the inner cavity of the V-shaped sand storage box (1) and is rotatably connected thereto.

7. The fine sand supply device according to claim 1, characterized in that: The front and rear sides of the V-shaped sand storage box (1) are respectively connected with connecting plates (8), and a plurality of opening grooves (11) are respectively arranged at intervals on the connecting plates (8). Bolts are respectively arranged in the opening grooves (11), and the bolts are screwed on the fixing frame (41).

8. The fine sand supply device according to claim 1, characterized in that: At least two fixing rod assemblies (90) are connected to one side of the fixing frame (41) at intervals. The fixing rod assembly (90) comprises a fixing block (91) and a fixing rod body (92) inserted through the fixing block (91). The fixing block (91) is provided with a plurality of mounting holes (93) at intervals. The end of the fixing rod body (92) is connected to the fixing frame (41). A locking screw (94) is spirally inserted through the fixing block (91). The end of the locking screw (94) is tightly connected to the fixing rod body (92).

9. Accelerated polishing machine, characterized in that: It comprises the fine sand supply device as described in any one of claims 1 to 8.

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