A chemical material screening machine for chemical production

Abstract

This invention relates to the field of chemical processing technology, specifically a chemical material screening machine for chemical production. It includes a conveyor frame, a turnover frame connected to the conveyor frame, and a screening frame connected to the turnover frame. The turnover frame is equipped with a transmission frame and a conveying hopper mounted on the transmission frame. A conveyor belt is mounted on the conveyor frame, and a screening bucket is mounted on the screening frame. The conveying hopper is movable and mounted on the transmission frame, engaging with the conveyor belt and screening bucket during its movement cycle. A primary screening chamber is also provided within the turnover frame. The conveying hopper is located at the upper edge of the primary screening chamber and communicates with its inner cavity for screening. During the screening process, this invention maintains a continuous conveying state for the material and rapidly processes the screened material, effectively adapting to the overall assembly line operation environment and significantly reducing the dwell time of both the material to be screened and the screened material.

Description

Technical Field

[0001] This invention relates to the field of chemical processing technology, specifically a chemical material screening machine for chemical production. Background Technology

[0002] A chemical vibrating screen is a high-precision fine powder screening machine. It typically adopts a closed structure with a vertical motor as the excitation source. Eccentric weights are installed at the upper and lower ends of the motor to convert the rotational motion of the motor into a three-dimensional motion of horizontal, vertical and inclined motion, which is then transmitted to the screen surface.

[0003] Chinese patent (authorization announcement number: CN214077719U) discloses a chemical material screening machine for chemical production. It has a base plate with a placement box fixedly connected to the top. The placement box has an internal cavity, and the bottom of the cavity has a movable groove. A material box is slidably connected inside the movable groove. Three sets of supports are fixedly connected to the left inner wall of the cavity. This patent optimizes existing box-type material screening equipment by adding a screening layer. However, since the chemical materials are transported based on an overall assembly line process, using a closed structure for screening would result in significant time delays, making it incompatible with the overall assembly line process and thus affecting overall production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a chemical material screening machine for chemical production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A chemical material screening machine for chemical production includes a conveying frame, a turnover frame connected to the conveying frame, and a screening frame connected to the turnover frame.

[0007] The turnover frame is equipped with a transmission frame and a conveying hopper mounted on the transmission frame. The conveying frame is equipped with a conveying belt, and the screening frame is equipped with a screening barrel. The conveying hopper is movable and installed on the transmission frame and is respectively connected to the conveying belt and the screening barrel during the movement cycle.

[0008] The turnover frame is still provided with a primary screening chamber. The conveying hopper is located on the upper edge of the primary screening chamber and is connected to the inner cavity of the primary screening chamber for screening. The output end of the primary screening chamber is connected to a first screening conveyor belt, and the output end of the screening bucket is respectively provided with a second screening conveyor belt.

[0009] As a further embodiment of the present invention: the transmission frame includes a support frame plate disposed on the top of the frame, running tracks disposed on both sides of the support frame plate, and a running frame installed between the running tracks, wherein a support frame is disposed on the running frame, and the conveying hopper is mounted on the support frame.

[0010] As a further aspect of the present invention: a drive cavity is provided in the running track on one side, a drive screw is installed in the drive cavity, and an inner slider is installed on the running frame on the corresponding side. The inner slider is installed in the drive cavity and driven by the drive screw.

[0011] As a further aspect of the present invention: the top of the conveying hopper has a concave section, the leading edge of the concave section has a discharge end, the bottom of the conveying hopper has a primary filter screen, the primary screening chamber is disposed within a support frame, and the conveying hopper is mounted above the primary screening chamber.

[0012] As a further aspect of the present invention: a guide slope is provided at the bottom of the primary screening chamber, and an output port is connected to the end of the guide slope, and the output port is connected to a first screening conveyor belt.

[0013] As a further aspect of the present invention: the conveyor belt includes a feeding section, a transmission section connected to the feeding section, and a connecting section installed at the output position of the transmission section, wherein the beginning of the conveying hopper is connected to the connecting section.

[0014] As a further embodiment of the present invention: a support shaft is provided on the side edge of the running frame and a rotating disk is installed on the support shaft. The support frame is provided on the rotating disk. A rotating frame is provided on the bottom edge of the rotating disk and an inclined support piece is installed at the bottom end of the rotating frame. A blocking block and an abutting piece are installed between the turnover frame and the screening frame. The abutting piece abuts against the inclined support piece.

[0015] As a further embodiment of the present invention: a reset coil spring is wound on the support shaft, a fixing plate is installed at the shaft end of the support shaft, one end of the reset coil spring is installed on the rotating disk, and the other end is connected to the fixing plate.

[0016] As a further embodiment of the present invention: the screening hopper includes a receiving hopper, a filter rail disposed in the centerline area of ​​the receiving hopper, and a secondary screening cylinder installed at the bottom of the filter rail. The screening frame includes a base support disposed at the bottom, a support frame mounted on the base support, and a rotating frame mounted on the support frame. The receiving hopper is entirely mounted on the rotating frame, and the secondary screening cylinder extends through the support frame into the base support. The second screening conveyor belt is disposed within the base support and located at the bottom edge of the secondary screening cylinder.

[0017] As a further aspect of the present invention: the receiving hopper is provided with an opening at its bottom edge, and a guide frame is connected to the opening, with the end of the guide frame facing the second screening conveyor belt.

[0018] As a further embodiment of the present invention: the support frame includes a base plate and a support ring disposed on the base plate; the rotating frame includes a loading plate, an inner insert ring disposed at the bottom of the loading plate, and a loading slot disposed at the top of the loading plate; the inner insert ring is inserted into the support ring; the receiving bucket is mounted on the loading slot; the inner surface of the inner insert ring is provided with inner ring teeth; the base support is provided with an internal drive motor and an internal drive gear mounted on the internal drive motor; the internal drive gear meshes with the inner ring teeth.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention is integrated into the overall chemical production process. The conveyor frame, turnover frame, and screening frame are mounted on the relevant operational stages of the production line. At the beginning, the conveyor hopper is connected to the conveyor belt, allowing material to be introduced into it. The conveyor hopper is movable and mounted on the transmission frame, moving forward along the frame to transport material. The conveyor hopper itself also functions as a screening component, mounted on the upper edge of the primary screening chamber. During its movement, it performs primary screening to remove finely crushed or pulverized slag or dust. These materials are relatively small and contain many impurities such as dust and slag, resulting in low practical value. After screening, they are output via the first screening conveyor belt. At the end of the conveyor hopper's movement, it tilts and pours the material into the screening bucket. During pouring, the material disperses and is then screened in the screening bucket using a specific mesh size to determine the finished product size, thus separating materials of different qualities. The screened material is then output sequentially via the second screening conveyor belt.

[0021] Compared with existing technologies, this invention does not use a sealed box screening method. During the screening process, the material is continuously conveyed and the screened material is quickly conveyed and processed. It can effectively adapt to the overall assembly line operation environment, greatly reduce the stagnation time of the material to be screened and the screened material, and improve the overall chemical production efficiency.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of a chemical material screening machine for chemical production provided in an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the turnover rack provided in an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the conveyor belt provided in an embodiment of the present invention.

[0027] Figure 4 A schematic diagram of the operating frame provided in an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the screening machine frame provided in an embodiment of the present invention.

[0029] Figure 6 For the present invention Figure 1 A schematic diagram of the structure of region A in the diagram.

[0030] In the diagram: 11. Conveying frame; 12. Turnover frame; 13. Screening frame; 21. Transmission frame; 22. Conveying hopper; 23. Conveying belt; 24. Screening barrel; 25. Primary screening chamber; 26. First screening conveyor belt; 27. Second screening conveyor belt; 31. Support frame; 32. Running track; 33. Running frame; 34. Support frame; 35. Drive chamber; 36. Drive screw; 37. Internal slider; 41. Concave section; 42. Discharge end; 43. Primary filter screen; 44. Output port; 45. Guide slope; 46. Feeding section; 47. 48. Transmission section; 51. Connecting section; 52. Support shaft; 53. Rotating disk; 54. Rotating frame; 55. Inclined support plate; 56. Blocking block; 57. Contact plate; 58. Reset coil spring; 69. Fixing plate; 60. Receiving bucket; 61. Filter rail; 62. Secondary screening cylinder; 63. Opening and closing port; 64. Base support; 65. Support frame; 66. Rotating frame; 67. Guide frame; 78. Base plate; 79. Support ring; 70. Loading plate; 71. Inner ring; 72. Loading slot; 73. Inner ring teeth; 74. Internal drive motor; 75. Internal drive gear. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0032] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0034] In one embodiment;

[0035] Please see Figure 1 A chemical material screening machine for chemical production is provided, including a conveying frame 11, a turnover frame 12 connected to the conveying frame 11, and a screening frame 13 connected to the turnover frame 12.

[0036] The turnover frame 12 is provided with a transmission frame 21 and a conveying hopper 22 mounted on the transmission frame 21. The conveying frame 11 is provided with a conveying belt 23. The screening frame 13 is provided with a screening bucket 24. The conveying hopper 22 is movably mounted on the transmission frame 21 and is respectively connected to the conveying belt 23 and the screening bucket 24 during the movement cycle.

[0037] The turnover frame 12 is still provided with a primary screening chamber 25. The conveying hopper 22 is located on the upper edge of the primary screening chamber 25 and is connected to the inner cavity of the primary screening chamber 25 for screening materials. The output end of the primary screening chamber 25 is connected to a first screening conveyor belt 26, and the output end of the screening bucket 24 is respectively provided with a second screening conveyor belt 27.

[0038] This embodiment is integrated into the overall chemical production process. The conveyor frame 11, the turnover frame 12, and the screening frame 13 are installed in the relevant operation links of the production line. The conveyor frame 11 is used to connect with the previous material input or output processes, and the material is input in batches. The material is output along the conveyor belt 23. The conveyor hopper 22 is connected to the conveyor belt 23 at the beginning position, so that the material is guided into the conveyor hopper 22. The conveyor hopper 22 is installed in a movable manner on the transmission frame 21 and moves forward along the transmission frame 21 to convey the material. The conveyor hopper 22 itself is also a screening component, which is mounted on the upper edge of the primary screening chamber 25. During the movement, it performs primary screening to screen out some fine and crushed slag or dust. These materials are relatively small and contain more impurities such as dust and slag, and have low practical value. After screening, they are output through the first screening conveyor belt 26.

[0039] After the hopper 22 moves to the end, it tilts and pours the material into the screening bucket 24. The material disperses during the pouring process and is then screened in the screening bucket 24 according to a certain mesh size to separate the finished product size, thereby separating materials of different qualities. The screened materials are then output through the second screening conveyor belt 27.

[0040] Compared with existing technologies, this embodiment does not use a sealed box screening method. During the screening process, the material is continuously conveyed and the screened material is quickly conveyed and processed. It can effectively adapt to the overall assembly line operation environment, greatly reduce the stagnation time of the material to be screened and the screened material, and improve the overall chemical production efficiency.

[0041] In one embodiment;

[0042] Please see Figure 2 and Figure 3 Regarding the specific implementation method of the material conveying hopper 22, this embodiment makes the following technical design:

[0043] The transmission frame 21 includes a support plate 31 on the top of the frame, running tracks 32 on both sides of the support plate 31, and a running frame 33 installed between the running tracks 32. A support frame 34 is provided on the running frame 33, and the hopper 22 is mounted on the support frame 34.

[0044] The top of the conveying hopper 22 is provided with a concave section 41, and the front edge of the concave section 41 is provided with a discharge end 42. The bottom of the conveying hopper 22 is provided with a primary filter screen 43. The primary screening chamber 25 is provided in the support frame plate 31, and the conveying hopper 22 is mounted above the primary screening chamber 25. The bottom of the primary screening chamber 25 is provided with a guide slope 45, and the end of the guide slope 45 is connected to an output port 44. The output port 44 is connected to a first screening conveyor belt 26.

[0045] The conveyor belt 23 includes a feeding section 46, a transmission section 47 connected to the feeding section 46, and a connecting section 48 installed at the output position of the transmission section 47. The beginning end of the conveyor hopper 22 is connected to the connecting section 48.

[0046] In this embodiment, the top of the transmission frame 21 is supported by a support plate 31, and running tracks 32 are provided on both sides. The conveying hopper 22 is supported on the running tracks 32 by a support frame 34. The space between the running tracks 32 is the space of the primary screening chamber 25, that is, the conveying hopper 22 is supported on the top of the primary screening chamber 25. The bottom of the conveying hopper 22 is provided with a primary filter screen 43. During the movement, the conveying hopper 22 continuously screens out powdery substances such as slag, dust, and furnace slag present in the material in the inner cavity. Due to the movement of the conveying hopper 22, the powdery substances mixed in the material are more easily screened out. After running to the end, the conveying hopper 22 tilts, and the front edge of the concave section 41 is provided with a pouring end 42 to pour the material into the subsequent screening bucket 24.

[0047] In one aspect of this embodiment, the motion drive method for the conveying hopper 22 is designed as follows:

[0048] A drive cavity 35 is provided within one side of the running track 32, and a drive screw 36 is installed within the drive cavity 35. An internal slider 37 is installed on the corresponding side of the running frame 33. The internal slider 37 is installed in the drive cavity 35 and is driven by the drive screw 36. In this embodiment, the drive screw 36 is designed as the driving tool in one side of the running track 32. The drive screw 36 drives the running frame 33 to move, thereby driving the support frame 34 and the conveying hopper 22 to move.

[0049] The drive end of the drive screw 36 adopts a variable-direction AC motor, which periodically changes the direction of motion, thereby driving the conveying hopper 22 to perform continuous reciprocating motion. The cycle of each motion is the same as the interval of material batch conveying.

[0050] In one embodiment;

[0051] Please see Figure 4 Regarding the specific implementation of the tipping of the hopper 22, this embodiment features the following technical design:

[0052] The running frame 33 has a support shaft 51 and a rotating disk 52 mounted on the support shaft 51 along its side. The support frame 34 is mounted on the rotating disk 52. The rotating disk 52 has a rotating frame 53 and an inclined support piece 54 mounted on the bottom of the rotating frame 53 along its bottom edge. A blocking block 55 and an abutting piece 56 mounted on the blocking block 55 are installed between the turnover frame 12 and the screening frame 13. The abutting piece 56 abuts against the inclined support piece 54. A return spring 57 is wound around the support shaft 51. A fixing piece 58 is mounted on the shaft end of the support shaft 51. One end of the return spring 57 is mounted on the rotating disk 52, and the other end is connected to the fixing piece 58.

[0053] A contact plate 56 is installed between the turnover frame 12 and the screening frame 13. When the conveying hopper 22 moves close to the end, the inclined support plate 54 contacts the contact plate 56. The contact plate 56 forms a blocking tendency on the inclined support plate 54, thereby driving the rotating frame 53 to move, that is, driving the rotating disk 52 to rotate around the support shaft 51 as the fulcrum, thereby driving the support frame 34 to flip, and then driving the conveying hopper 22 to tilt forward to pour out the material. During the flipping process of the support frame 34, the return coil spring 57 is squeezed and compressed. As the conveying hopper 22 moves back, the blocking force of the contact plate 56 on the inclined support plate 54 disappears. The return coil spring 57 drives the rotating disk 52 to rotate and reset, thereby driving the conveying hopper 22 to rotate back to the horizontal state.

[0054] In one embodiment;

[0055] Please see Figure 5 Regarding the specific implementation of the 24-screening method in the screening barrel, this embodiment features the following technical design:

[0056] The screening hopper 24 includes a receiving hopper 61, a filter rail 62 located in the center area of ​​the receiving hopper 61, and a secondary screening cylinder 63 installed at the bottom of the filter rail 62. The screening frame 13 includes a base support 65 at the bottom, a support frame 66 installed on the base support 65, and a rotating frame 67 installed on the support frame 66. The receiving hopper 61 is entirely mounted on the rotating frame 67, and the secondary screening cylinder 63 extends through the support frame 66 into the base support 65. The second screening conveyor belt 27 is located inside the base support 65 and at the bottom edge of the secondary screening cylinder 63. The receiving hopper 61 has an opening 64 on its side bottom edge, and a guide frame 68 is connected to the opening 64. The end of the guide frame 68 faces the second screening conveyor belt 27.

[0057] A filter bar 62 is provided in the centerline area of ​​the receiving hopper 61. The filter bar 62 is the material filtration structure. The receiving hopper 61 is mounted on a rotating frame 67, which rotates relative to the supporting frame 66. During the tilting pouring process, the granular material is dispersed and spread inside the receiving hopper 61. The filter bar 62 performs the filtration effect, screening the material below the mesh standard into the secondary screening cylinder 63. In this embodiment, the rotation method is used, which makes the material in the receiving hopper 61 form a vortex-like distribution trend. Under the centrifugal trend, the material with a larger volume has a relatively larger mass, so it is closer to the edge of the inner cavity of the receiving hopper 61. The material with a smaller volume has a relatively smaller mass, so it is easier to gather in the filter bar 62 area at the centerline position, which is conducive to quickly screening out the material with a smaller volume. After all the material below the mesh standard has been output, the rotation of the rotating frame 67 is stopped, the opening 64 is opened, and the remaining large volume material in the receiving hopper 61 is discharged through the guide frame 68.

[0058] Preferably, the filter bar 62 can be used for screening materials using a vibrating screen or other related auxiliary screening methods.

[0059] Preferably, the secondary screening cylinder 63 serves as a temporary storage device during screening, and two transmission lines are arranged in parallel on the second screening conveyor belt 27, which are connected to the secondary screening cylinder 63 and the guide frame 68 respectively, for the transmission of materials of different volumes.

[0060] Preferably, the secondary screening cylinder 63 and the opening / closing port 64 can be connected by an electric control method, and the opening and closing of the cover can be controlled by an electric control method. If the quality inside the secondary screening cylinder 63 does not change for a long time, it can be considered that the material below the mesh standard has been screened out. At this time, the bottom outlet of the secondary screening cylinder 63 and the opening / closing port 64 are opened at the same time to discharge the screened material.

[0061] In one embodiment, the rotational implementation structure of the rotating frame 67 is designed as follows:

[0062] Please see Figure 4 The support frame 66 includes a base plate 71 and a support ring 72 disposed on the base plate 71. The rotating frame 67 includes a loading plate 73, an inner insert ring 74 disposed at the bottom of the loading plate 73, and a loading slot 75 disposed at the top of the loading plate 73. The inner insert ring 74 is inserted into the support ring 72. The receiving bucket 61 is mounted on the loading slot 75. The inner surface of the inner insert ring 74 is provided with inner ring teeth 76. The base bracket 65 is provided with an internal drive motor 77 and an internal drive gear 78 mounted on the internal drive motor 77. The internal drive gear 78 meshes with the inner ring teeth 76.

[0063] The receiving hopper 61 is mounted on the loading slot 75, which is located on the loading base plate 73. The loading base plate 73 is limited and installed in the support ring 72 by the inner insert ring 74. During operation, the internal drive motor 77 is used as the power end to drive the internal drive gear 78 to move. Through the tooth meshing transmission, the inner insert ring 74 is driven to move, thereby driving the loading base plate 73 to rotate, and then driving the receiving hopper 61 to rotate, so as to assist in screening materials by centrifugal force.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chemical material screening machine for chemical production, comprising a conveying frame, a turnover frame connected to the conveying frame, and a screening frame connected to the turnover frame; characterized in that, The turnover frame is equipped with a transmission frame and a conveying hopper mounted on the transmission frame. The conveying frame is equipped with a conveying belt, and the screening frame is equipped with a screening barrel. The conveying hopper is movable and installed on the transmission frame and is respectively connected to the conveying belt and the screening barrel during the movement cycle. The turnover frame is still provided with a primary screening chamber. The conveying hopper is located on the upper edge of the primary screening chamber and is connected to the inner cavity of the primary screening chamber for screening. The output end of the primary screening chamber is connected to a first screening conveyor belt, and the output end of the screening bucket is respectively provided with a second screening conveyor belt. The transmission frame includes a support frame plate on the top of the frame, running tracks on both sides of the support frame plate, and a running frame frame installed between the running tracks. A support frame is provided on the running frame frame, and the conveying hopper is mounted on the support frame frame. The top of the conveying hopper is provided with a concave section, and the front edge of the concave section is provided with a discharge end. The bottom of the conveying hopper is provided with a primary filter screen. The primary screening chamber is located in the support frame plate, and the conveying hopper is mounted above the primary screening chamber. The bottom of the primary screening chamber is provided with a guide slope, and the end of the guide slope is connected to an output port. The output port is connected to the first screening conveyor belt. The side edge of the running frame is provided with a support shaft and a rotating disk mounted on the support shaft. The support frame is provided on the rotating disk. The bottom edge of the rotating disk is provided with a rotating frame and an inclined support piece mounted on the bottom end of the rotating frame. A blocking block and an abutting piece mounted on the blocking block are installed between the turnover frame and the screening frame. The abutting piece abuts against the inclined support piece. A reset coil spring is wound around the support shaft, and a fixing plate is installed at the end of the support shaft. One end of the reset coil spring is installed on the rotating disk, and the other end is connected to the fixing plate. The screening hopper includes a receiving hopper, a filter rail located in the centerline area of ​​the receiving hopper, and a secondary screening cylinder installed at the bottom of the filter rail. The screening frame includes a base support at the bottom, a support frame installed on the base support, and a rotating frame installed on the support frame. The receiving hopper is entirely mounted on the rotating frame, and the secondary screening cylinder extends through the support frame into the base support. The second screening conveyor belt is located inside the base support and at the bottom edge of the secondary screening cylinder. The inner surface of the rotating frame is provided with inner ring teeth. The base support is provided with an internal drive motor and an internal drive gear mounted on the internal drive motor. The internal drive gear meshes with the inner ring teeth to drive the receiving bucket to rotate.

2. The chemical material screening machine for chemical production according to claim 1, characterized in that, One side of the running track has a drive cavity, and a drive screw is installed in the drive cavity. An inner slider is installed on the running frame on the corresponding side. The inner slider is installed in the drive cavity and is driven by the drive screw.

3. The chemical material screening machine for chemical production according to claim 1, characterized in that, The conveyor belt includes a feeding section, a transmission section connected to the feeding section, and a connecting section installed at the output position of the transmission section. The beginning of the conveying hopper is connected to the connecting section.

4. The chemical material screening machine for chemical production according to claim 1, characterized in that, The receiving hopper has an opening on its side bottom edge, and a guide frame is connected to the opening. The end of the guide frame faces the second screening conveyor belt.

5. The chemical material screening machine for chemical production according to claim 1, characterized in that, The support frame includes a base plate and a support ring disposed on the base plate. The rotating frame includes a loading plate, an inner ring disposed at the bottom of the loading plate, and a loading slot disposed at the top of the loading plate. The inner ring is inserted into the support ring, and the receiving bucket is mounted on the loading slot. The inner surface of the inner ring is provided with inner ring teeth.

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