Ball mill with uniform grinding function
By designing a ball mill with multiple grinding and uniformity control, the problems of low efficiency, serious wear of parts and uneven particle size of traditional ball mills are solved, and efficient and uniform ore powder grinding is achieved.
Patent Information
- Application Number
- CN202510446476.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-05-09
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional ball mills have low efficiency during the grinding process, severe wear of parts, high cost and uneven grinding, resulting in uneven particle size.
A uniformly grinding ball mill is designed to achieve multiple grinding and uniformity control of minerals through the combination of spherical grinding machines, grinding groups, cutting machines and other components. The spherical grinder performs the initial grinding, the grinding group performs the secondary grinding, and the cutting machine performs the final grinding to ensure uniform particle size.
It improves the grinding efficiency of the ball mill, reduces parts wear, reduces replacement costs, and achieves uniform particle size of ore powder, extends the service life of the equipment.
Smart Images

Figure CN119951653A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ceramic machinery, in particular to a uniform grinding ball mill. Background Art
[0002] At present, ball mill is a common mineral powder grinding machine in ceramic production. The most important working parts in the ball mill are the liner and grinding media. The impact and wear of the grinding media and ore on the liner of the ball mill make the liner of the ball mill one of the main consumable materials in the operation of the ball mill. Therefore, the quality and performance of the liner directly affect the grinding quality and the service life of the ball mill.
[0003] At present, ball mills consume a lot of energy during the grinding process. For harder minerals, the grinding energy consumption is higher and more difficult to control. Traditional ball mills have low working efficiency, high wear of internal parts, and need to be replaced frequently, which increases costs. The grinding process of ball mills is uneven, resulting in uneven particle size. Summary of the invention
[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a uniform grinding ball mill, comprising: A top component, the top component has a circular structure, the outer surface of the top component is fixedly connected to a connection component, and the bottom of the top component is fixedly connected to a pipeline component; A machine body, the machine body having a cylindrical structure, the top of the machine body being fixedly connected to the bottom of the pipeline assembly, the bottom of the machine body being fixedly connected to a circular plate, and the outer surface of the machine body being fixedly connected to a stabilizer; A support plate, the support plate has a circular structure and is provided with holes, the inner surface of the support plate is fixedly connected to the outer surface of the pipeline assembly, and the holes of the support columns are fixedly connected to brackets; A base assembly, the top of which is fixedly connected to the bottom of the circular plate, and the top of which is fixedly connected to a bracket; A cutter having a circular structure, wherein a central shaft is fixedly connected to the interior of the cutter; A ball grinder, the interior of which is fixedly connected to the outer surface of the central shaft.
[0005] The top assembly also includes a top shell, the outer surface of which is fixedly connected with a strip block, the interior of which is fixedly connected with a motor group, and the output end of the motor group passes through the top shell and is fixedly connected with a central shaft. Therefore, the output end of the motor group can provide a power source for the machine body, and the central shaft fixedly connected through the output end of the motor group can provide power to the inside of the machine body, thereby ensuring the normal operation of the entire ball mill.
[0006] The pipeline assembly also includes a pipeline shell, the outer surface of which is fixedly connected to a thickened transverse pipe, the bottom of which is fixedly connected to an annular ring, the bottom of which is fixedly connected to a connecting plate, and the bottom of which is fixedly connected to a supporting plate. Therefore, before the ball mill is operated, the mineral material enters the machine body through the pipeline assembly, and the annular ring is added to the pipeline assembly to reinforce the connection, so as to ensure that a large amount of mineral material will not fall off after impact, thereby ensuring the stable transportation of the mineral material.
[0007] The stabilizer also includes a square shell, which is fixedly connected to the outer surface of the body, and the square shell is provided with a groove, and connecting blocks are fixedly connected to the two ends of the groove, and the number of connecting blocks is two, and pillars are fixedly connected between the opposite surfaces of the connecting blocks, and a connecting column is fixedly connected to the middle of the outer surface of the pillar. Therefore, the stabilizer keeps the body part stable. First, the pillar inside the square shell plays a supporting role, and the connecting column plays a shock absorbing role, ensuring that the shaking and impact generated when the body is working are buffered, and ensuring the smooth operation of the components inside the body.
[0008] The connection assembly also includes an arc-shaped clamp, one side of the outer surface of the arc-shaped clamp is fixedly connected to the outer surface of the top shell, the outer surface of the arc-shaped clamp is fixedly connected to a connecting pipe, the end of the connecting pipe away from the arc-shaped clamp is fixedly connected to a shrinking clamp, and the outer surface of the shrinking clamp is fixedly connected to the outer surface of the body. Therefore, the top assembly and the pipeline assembly are connected through the action of the connection assembly, the top assembly is opened through the strip block of the top assembly, and the mineral material is put into the pipeline assembly, and enters the interior of the body through the pipeline assembly to ensure transportation.
[0009] The ball grinder also includes an arc interface, the inner wall of which is fixedly connected to the outer surface of the central shaft, the outer surface of which is fixedly connected to an annular plate, the outer surface of which is fixedly connected to a body block, and the number of the body blocks is eight. Therefore, when the operator starts the motor group, the motor group drives the central shaft, the central shaft drives the arc interface to rotate, and the rotation of the arc interface drives the operation of the ball grinder to ensure the stability of the grinding work.
[0010] The outer surface of the body block is fixedly connected with a support rod, and one end of the support rod away from the body block is fixedly connected with a circular block, and the outer surface of the circular block is fixedly connected with a spherical block, and the number of spherical blocks is eight, and the bottom of the arc interface is slidably connected with a mesh plate, and the bottom of the mesh plate is slidably connected with a grinding group. Therefore, the spherical block impacts the mineral to achieve the grinding effect, ensuring the stability of the initial grinding of the overall machine.
[0011] The grinding group also includes a diamond plate, the inner wall of which is fixedly connected to the outer surface of the central axis, the bottom of which is slidably connected to an annular interface, the outer surface of which is fixedly connected to a clamping plate, the outer surface of which is fixedly connected to a column block, the end of which away from the clamping plate is fixedly connected to a square block, and the bottom of which is slidably connected to a strip plate. Therefore, after the mineral is crushed and crushed by the diamond plate, the mineral is quickly impacted and the strip plate is cleaned by the rotating square block, so that the strip plate is prevented from being blocked by the debris after grinding, thereby ensuring the stable operation of the grinding work.
[0012] The cutter also includes an annular block, the outer surface of the annular block is fixedly connected to a connecting block, the top of the connecting block is fixedly connected to a fixed block, the bottom of the fixed block is fixedly connected to a rotating piece, and the outer surface of the connecting block is fixedly connected to a rotating piece. Therefore, when the motor group is started, the cutter rotates rapidly, and the minerals filtered from the strip plate are finally ground, and the uniformity of grinding is ensured through large block impact and slicing.
[0013] The base assembly also includes a base shell, the top of the base shell is fixedly connected to the bottom of the circular plate, the outer surface of the base shell is fixedly connected with an arc block, and the number of the arc blocks is two, the outer surface of the base shell is fixedly connected with a discharge bin, and the outer surface of the discharge bin is fixedly connected with a handle. Therefore, after the minerals are ground and filtered by the whole body, they enter the discharge bin and are collected through the discharge bin. At the same time, the arc plates are on both sides of the base shell to ensure the contact area between the machine and the ground and ensure the overall stability of the machine.
[0014] The present invention provides a ball mill for uniform grinding, which has the following beneficial effects: 1. The uniform grinding ball mill uses a ball grinder to grind the ceramic and other minerals that have just entered for the first time. The spherical grinding block is used to knock the minerals through high-speed operation. Short-distance and long-distance spherical blocks are fully set for knocking for preliminary grinding.
[0015] Second, the uniformly grinding ball mill uses the diamond plates of the grinding group to perform secondary grinding on the minerals filtered from the ball grinder. When the minerals enter the range of the diamond plates, the diamond plates will perform secondary grinding on the larger minerals and fully stir them.
[0016] 3. The evenly ground ball mill passes through the diamond plate of the grinding group and then enters the bottom square block for grinding. The fast-running square block plus the diamond design will impact the mineral at the fastest speed and clean the debris on the strip plate at the same time.
[0017] Fourth, the uniform grinding ball mill can grind the minerals falling from the strip plate three times. It has a large-area impact block and a diamond-shaped slicing design at the corners, which can continuously stir, grind and cut the minerals.
[0018] 5. The uniformly grinding ball mill can control the vibration caused by grinding inside the body through the stabilizer. The stabilizer wraps the body and can reduce the outward impact force from the inside of the body through tension, thereby achieving the effect of protecting the body. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the external structure of a uniform grinding ball mill of the present invention; Figure 2 This is a schematic diagram of the structure of a uniformly grinding ball mill according to the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of a uniformly grinding ball mill according to the present invention; Figure 4 This is a schematic diagram of the top cross-sectional structure of a uniformly grinding ball mill according to the present invention; Figure 5 This is a schematic diagram of the structure of a ball mill component for uniform grinding according to the present invention; Figure 6 This is a schematic diagram of the structure of a ball mill component for uniform grinding according to the present invention; Figure 7 This is a schematic diagram of the structure of a ball mill component for uniform grinding according to the present invention; Figure 8 The figure is a schematic diagram of the structure of the components of a uniformly grinding ball mill according to the present invention.
[0020] In the figure: 1, bracket; 2, top assembly; 3, pipeline assembly; 4, machine body; 5, base assembly; 6, stabilizer; 7, connection assembly; 8, motor group; 9, ball grinder; 10, center axis; 11, mesh plate; 12, grinding group; 14, strip plate; 15, cutter; 16, circular plate; 17, support plate; 21, top shell; 22, strip block; 31, pipeline shell; 32, thickened horizontal pipe; 33, annular ring; 34, connecting plate; 51, base shell; 52, arc block; 53, Discharge bin; 54, handle; 61, square shell; 62, connecting block; 63, connecting column; 64, pillar; 71, arc-shaped clamp; 72, connecting pipe; 73, contraction clamp; 91, arc-shaped interface; 92, annular plate; 93, body block; 94, support rod; 95, round block; 96, spherical block; 121, diamond plate; 122, annular interface; 123, clamping plate; 124, column block; 125, square block; 151, annular block; 152, connecting block; 153, fixing block; 154, rotating piece. DETAILED DESCRIPTION
[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.
[0022] like Figure 1-Figure 8 As shown, the present invention provides a technical solution: a uniform grinding ball mill, comprising: A top component 2, the top component 2 having a circular structure, the outer surface of the top component 2 is fixedly connected to a connection component 7, and the bottom of the top component 2 is fixedly connected to a pipeline component 3; A machine body 4, which has a cylindrical structure, the top of the machine body 4 is fixedly connected to the bottom of the pipeline assembly 3, the bottom of the machine body 4 is fixedly connected to a circular plate 16, and the outer surface of the machine body 4 is fixedly connected to a stabilizer 6; A support plate 17, which has a circular structure and is provided with a hole. The inner surface of the support plate 17 is fixedly connected to the outer surface of the pipe assembly 3, and the hole of the support plate 17 is fixedly connected to the bracket 1; A base assembly 5, the top of which is fixedly connected to the bottom of a circular plate 16, and the top of which is fixedly connected to a bracket 1; A cutter 15, the cutter 15 has a circular structure, and a central shaft 10 is fixedly connected to the interior of the cutter 15; The ball grinder 9 is fixedly connected to the outer surface of the central shaft 10 .
[0023] The top assembly 2 also includes a top shell 21, the outer surface of which is fixedly connected to a strip block 22, the top shell 21 is fixedly connected to a motor group 8, and the output end of the motor group 8 passes through the top shell 21 and is fixedly connected to a central shaft 10. The motor group 8 is fixedly connected to the top shell 21, and the output end of the motor group 8 is fixedly linked to the central shaft 10, and the operation of the output end of the motor group 8 drives the central shaft 10 to move into the body. Therefore, the output end of the motor group can provide a power source for the body, and the central shaft fixedly connected through the output end of the motor group can provide power to the body, thereby ensuring the normal operation of the entire ball mill.
[0024] The pipeline assembly 3 also includes a pipeline shell 31, the outer surface of which is fixedly connected to a thickened transverse tube 32, the bottom of which is fixedly connected to an annular ring 33, the bottom of which is fixedly connected to a connecting plate 34, and the bottom of which is fixedly connected to a support plate 17. The outer surface of the pipeline shell 31 is fixedly connected to the thickened transverse tube 32, and the bottom of the pipeline shell 31 is respectively connected to an annular ring 33 and a connecting plate 34. Therefore, before the ball mill is operated, the mineral material enters the machine body through the pipeline assembly, and an annular ring is added to the pipeline assembly to reinforce the connection, so as to ensure that a large amount of mineral material will not fall off after impact, and to ensure the stable transportation of the mineral material.
[0025] The stabilizer 6 also includes a square shell 61, which is fixedly connected to the outer surface of the body 4. The square shell 61 is provided with a groove, and connecting blocks 62 are fixedly connected to the two ends of the groove. There are two connecting blocks 62, and pillars 64 are fixedly connected between the opposite surfaces of the connecting blocks 62. A connecting column 63 is fixedly connected to the middle of the outer surface of the pillar 64. The pillar 64 is fixedly connected to the inside of the square shell 61, and the connecting blocks 62 are fixedly connected to the two ends of the pillar 64, and the connecting column 63 is fixedly connected to the middle of the outer surface of the pillar 64. Therefore, the stabilizer keeps the body part stable. First, the pillars inside the square shell play a supporting role, and the connecting columns play a shock absorbing role, ensuring that the shaking and impact generated when the body is working are buffered, and ensuring the smooth operation of the components inside the body.
[0026] The connection assembly 7 also includes an arc-shaped clamp 71, one side of the outer surface of the arc-shaped clamp 71 is fixedly connected to the outer surface of the top shell 21, the outer surface of the arc-shaped clamp 71 is fixedly connected to a connecting pipe 72, and the end of the connecting pipe 72 away from the arc-shaped clamp 71 is fixedly connected to a shrinking clamp 73, and the outer surface of the shrinking clamp 73 is fixedly connected to the outer surface of the body 4. One side of the arc-shaped clamp 71 is connected to the top shell 21, and the other side is connected to the connecting pipe 72, and one end of the connecting pipe 72 is connected to the shrinking clamp 73. While maintaining the connection relationship, the staff can use it to open the top shell and put in the mineral material. Therefore, the top assembly and the pipeline assembly are connected through the action of the connection assembly, the top assembly is opened through the strip block of the top assembly, and the mineral material is put into the pipeline assembly, and then enters the interior of the body through the pipeline assembly to ensure transportation.
[0027] The ball grinder 9 also includes an arc interface 91, the inner wall of which is fixedly connected to the outer surface of the central shaft 10, the outer surface of which is fixedly connected to an annular plate 92, the outer surface of which is fixedly connected to a body block 93, and the number of the body blocks 93 is eight. During operation, the arc interface 91 is connected to the central shaft 10, and the central shaft 10 drives the arc interface to rotate, and the other side of the arc interface 91 is fixedly connected to the annular plate 92, and the annular plate 92 is fixedly connected to the body block 93. Therefore, when the operator starts the motor group, the motor group drives the central shaft, and the central shaft drives the arc interface to rotate, and the rotation of the arc interface drives the operation of the ball grinder to ensure the stability of the grinding work.
[0028] The outer surface of the body 93 is fixedly connected with a support rod 94, and one end of the support rod 94 away from the body 93 is fixedly connected with a circular block 95, and the outer surface of the circular block 95 is fixedly connected with a spherical block 96, and the number of spherical blocks 96 is eight, and the bottom of the arc interface 91 is slidably connected with a mesh plate 11, and the bottom of the mesh plate 11 is slidably connected with a grinding group 12. During operation, the body 93 is fixedly connected with the support rod 94, the support rod 94 is fixedly connected with the circular block 95, and the circular block 95 is fixedly connected with the spherical block 96. Therefore, the spherical block impacts the mineral, thereby achieving the grinding effect, ensuring the stability of the initial grinding of the overall machine.
[0029] The grinding group 12 also includes a diamond plate 121, the inner wall of which is fixedly connected to the outer surface of the central shaft 10, the bottom of the diamond plate 121 is slidably connected to an annular interface 122, the outer surface of the annular interface 122 is fixedly connected to a clamping plate 123, the outer surface of the clamping plate 123 is fixedly connected to a column block 124, the end of the column block 124 away from the clamping plate 123 is fixedly connected to a square block 125, and the bottom of the annular interface 122 is slidably connected to a strip plate 14. The central shaft 10 drives the diamond plate 121 to rotate, and the diamond plate 121 rotates to squeeze, crush and crush the mineral, and the bottom column block 124 is fixedly connected to the square block 125. Therefore, after the diamond plate crushes and crushes the mineral, the rotating square block quickly impacts the mineral and cleans the strip plate, preventing the strip plate from being blocked by the debris after grinding, thereby ensuring the stable operation of the grinding work.
[0030] The cutter 15 also includes an annular block 151, the outer surface of the annular block 151 is fixedly connected with a connecting block 152, the top of the connecting block 152 is fixedly connected with a fixed block 153, the bottom of the fixed block 153 is fixedly connected with a rotating piece 154, and the outer surface of the connecting block 152 is fixedly connected with the rotating piece 154. The connecting block 152 is connected through the annular block 151, the connecting block 152 is fixedly connected with the fixed block 153, and the fixed block 153 is fixedly connected with the rotating piece 154. Therefore, when the motor group is started, the cutter rotates rapidly, and the minerals filtered from the strip plate are finally ground, and the uniformity of grinding is ensured through large-scale block impact and slicing.
[0031] The base assembly 5 also includes a base shell 51, the top of the base shell 51 is fixedly connected to the bottom of the circular plate 16, the outer surface of the base shell 51 is fixedly connected with an arc block 52, and the number of the arc blocks 52 is two, the outer surface of the base shell 51 is fixedly connected with a discharge bin 53, and the outer surface of the discharge bin 53 is fixedly connected with a handle 54. The top of the base shell 51 is connected to the circular plate 16, the two sides of the base shell 51 are connected with arc blocks 52, the outer surface of the base shell 51 is connected with a discharge bin 53, and the outer surface of the discharge bin 53 is fixedly connected with a handle 54. Therefore, after the minerals are ground and filtered by the whole body, they enter the discharge bin and are collected by the discharge bin. At the same time, the arc plates are on both sides of the base shell to ensure the contact area between the machine and the ground and ensure the overall stability of the machine.
[0032] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.
Claims
1. A ball mill for uniform grinding, characterized in that: include: A top component (2), the top component (2) having a circular structure, the outer surface of the top component (2) being fixedly connected to a connection component (7), and the bottom of the top component (2) being fixedly connected to a pipeline component (3); A machine body (4), the machine body (4) having a cylindrical structure, the top of the machine body (4) being fixedly connected to the bottom of the pipeline assembly (3), the bottom of the machine body (4) being fixedly connected to a circular plate (16), and the outer surface of the machine body (4) being fixedly connected to a stabilizer (6); A support plate (17), the support plate (17) having a circular structure and provided with a hole, the inner surface of the support plate (17) being fixedly connected to the outer surface of the pipeline assembly (3), and the hole of the support plate (17) being fixedly connected to the bracket (1); A base assembly (5), the top of the base assembly (5) being fixedly connected to the bottom of the circular plate (16), and the top of the circular plate (16) being fixedly connected to a bracket (1); A cutter (15), the cutter (15) having a circular structure, the interior of the cutter (15) being fixedly connected to a central shaft (10); A spherical grinder (9), wherein the interior of the spherical grinder (9) is fixedly connected to the outer surface of the central shaft (10).
2. A uniform grinding ball mill according to claim 1, characterized in that: The top component (2) further comprises a top shell (21), the outer surface of the top shell (21) being fixedly connected to a strip block (22), the interior of the top shell (21) being fixedly connected to a motor group (8), and the output end of the motor group (8) passing through the top shell (21) and being fixedly connected to a central shaft (10).
3. A uniform grinding ball mill according to claim 1, characterized in that: The pipeline assembly (3) further comprises a pipeline shell (31), the outer surface of the pipeline shell (31) being fixedly connected to a thickened transverse pipe (32), the bottom of the outer surface of the pipeline shell (31) being fixedly connected to an annular ring (33), the bottom of the pipeline shell (31) being fixedly connected to a connecting plate (34), and the bottom of the connecting plate (34) being fixedly connected to a support plate (17).
4. A uniform grinding ball mill according to claim 1, characterized in that: The stabilizer (6) further comprises a square shell (61), wherein the square shell (61) is fixedly connected to the outer surface of the body (4), the square shell (61) is provided with a groove, and connecting blocks (62) are fixedly connected to both ends of the groove, and there are two connecting blocks (62), pillars (64) are fixedly connected between opposite surfaces of the connecting blocks (62), and a connecting column (63) is fixedly connected to the middle of the outer surface of the pillar (64).
5. A uniform grinding ball mill according to claim 1, characterized in that: The connection assembly (7) further comprises an arc-shaped clamp (71), one side of the outer surface of the arc-shaped clamp (71) being fixedly connected to the outer surface of the top shell (21), a connecting tube (72) being fixedly connected to the outer surface of the arc-shaped clamp (71), an end of the connecting tube (72) away from the arc-shaped clamp (71) being fixedly connected to a retractable clamp (73), and an outer surface of the retractable clamp (73) being fixedly connected to the outer surface of the machine body (4).
6. A uniform grinding ball mill according to claim 1, characterized in that: The ball grinder (9) further comprises an arc-shaped interface (91), the inner wall of the arc-shaped interface (91) being fixedly connected to the outer surface of the central shaft (10), the outer surface of the arc-shaped interface (91) being fixedly connected to an annular plate (92), the outer surface of the annular plate (92) being fixedly connected to a body block (93), and the number of the body blocks (93) is eight.
7. A uniform grinding ball mill according to claim 6, characterized in that: The outer surface of the body block (93) is fixedly connected to a support rod (94), one end of the support rod (94) away from the body block (93) is fixedly connected to a circular block (95), the outer surface of the circular block (95) is fixedly connected to a spherical block (96), and the number of the spherical blocks (96) is eight, the bottom of the arc-shaped interface (91) is slidably connected to a mesh plate (11), and the bottom of the mesh plate (11) is slidably connected to a grinding group (12).
8. A uniform grinding ball mill according to claim 7, characterized in that: The grinding group (12) further comprises a diamond plate (121), the inner wall of the diamond plate (121) being fixedly connected to the outer surface of the central shaft (10), the bottom of the diamond plate (121) being slidably connected to an annular interface (122), the outer surface of the annular interface (122) being fixedly connected to a clamping plate (123), the outer surface of the clamping plate (123) being fixedly connected to a column block (124), one end of the column block (124) away from the clamping plate (123) being fixedly connected to a square block (125), and the bottom of the annular interface (122) being slidably connected to a strip plate (14).
9. A uniform grinding ball mill according to claim 1, characterized in that: The cutting machine (15) further comprises an annular block (151), the outer surface of the annular block (151) being fixedly connected to a connecting block (152), the top of the connecting block (152) being fixedly connected to a fixing block (153), the bottom of the fixing block (153) being fixedly connected to a rotating piece (154), and the outer surface of the connecting block (152) being fixedly connected to the rotating piece (154).
10. A uniform grinding ball mill according to claim 1, characterized in that: The base assembly (5) further comprises a base shell (51), the top of the base shell (51) being fixedly connected to the bottom of the circular plate (16), the outer surface of the base shell (51) being fixedly connected to an arc block (52), and the number of the arc blocks (52) is two, the outer surface of the base shell (51) being fixedly connected to a discharge bin (53), and the outer surface of the discharge bin (53) being fixedly connected to a handle (54).