Efficient filtering device in water-based paint production

Abstract

The utility model discloses an efficient filtering device in water-based paint production. The efficient filtering device comprises an assembling cylinder, a fine filtering cylinder, a coarse filtering cylinder, a material injection cylinder and an assembling cover fixedly mounted at the top of the assembling cylinder, wherein the assembling cylinder, the fine filtering cylinder, the coarse filtering cylinder and the material injection cylinder are concentrically arranged. A material collecting cavity is defined by the fine filter cylinder and the assembling cylinder, the coarse filter cylinder is rotationally installed in the assembling cylinder, the material injection cylinder is rotationally connected with the coarse filter cylinder, a material injection connector and an impurity discharging connector are formed in the assembling cover, and a material discharging connector is formed in the bottom of the assembling cylinder. An impurity removal umbrella cap A is fixed at the top of the fine filter cartridge, an impurity removal umbrella cap B is fixedly connected at the top of the coarse filter cartridge, and the impurity removal umbrella cap B is positioned above the impurity removal umbrella cap A. A spiral conveying blade A attached to the inner wall of the fine filter cylinder is mounted on the outer wall of the coarse filter cylinder, and a spiral conveying blade B attached to the inner wall of the coarse filter cylinder is mounted on the outer wall of the material injection cylinder. And the driving assembly is in power connection with the coarse filter cylinder and the injection cylinder. According to the device, impurities are efficiently removed, the filter cartridge is prevented from being blocked, the service life of equipment is prolonged, the maintenance frequency is reduced, production line automation and economic benefits are improved, and the filtering efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of water-based coating production technology, specifically a high-efficiency filtration device for water-based coating production. Background Technology

[0002] In the production of water-based coatings, filtration is a crucial step in ensuring coating quality. Existing filtration equipment typically uses filter cartridges or screens to remove insoluble impurities from the liquid. However, these traditional filtration devices have certain limitations in practical applications. First, existing filtration equipment often cannot effectively remove impurity particles trapped inside the filter cartridge in a timely manner. During the filtration process, impurities gradually accumulate on the inner wall of the filter cartridge, and over time, the filtration channels inside the cartridge become clogged, leading to a decrease in filtration efficiency. To maintain normal equipment operation, operators must periodically stop the machine for cleaning, which not only increases production downtime but also reduces overall work efficiency.

[0003] Secondly, traditional filtration devices struggle to efficiently and quickly remove impurities, typically relying on manual cleaning or slow discharge methods. This results in impurities not being removed quickly enough, further impacting paint production efficiency and quality. Furthermore, the long-term accumulation of impurities within the filtration device can damage its internal structure, increasing maintenance costs and equipment failure rates.

[0004] Therefore, there is an urgent need for an improved high-efficiency filtration device that can achieve immediate discharge of impurities during the filtration process, avoid filter cartridge clogging, and improve filtration efficiency and production continuity. Utility Model Content

[0005] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a high-efficiency filtration device for water-based coating production, which improves filtration efficiency, extends the service life of the equipment, effectively reduces the frequency of maintenance and cleaning, and improves the automation level and economic benefits of the production line.

[0006] The technical solution adopted by this utility model to achieve the above-mentioned objective is: a high-efficiency filtration device for water-based coating production, comprising an assembly cylinder, a fine filter cylinder, a coarse filter cylinder, an injection cylinder, and an assembly cover fixedly installed on the top of the assembly cylinder from the outside to the inside. The fine filter cylinder is fixedly installed in the assembly cylinder and forms a collection cavity with the assembly cylinder. The coarse filter cylinder is rotatably installed in the assembly cylinder. The injection cylinder is rotatably connected to the assembly cover and the coarse filter cylinder. The top of the assembly cover has an injection port that communicates with the assembly cylinder. The side wall of the assembly cover has a discharge port. The bottom of the assembly cylinder has a discharge port that communicates with the collection cavity.

[0007] The top of the fine filter cartridge is fixedly connected to a discharge cap A that mates with the assembly cover, and the top of the coarse filter cartridge is fixedly connected to a discharge cap B that extends into the assembly cover. The discharge cap B is positioned above the discharge cap A.

[0008] The outer wall of the coarse filter cylinder is fixedly connected to a spiral conveying blade A that is in close contact with the inner wall of the fine filter cylinder. The outer wall of the injection cylinder is fixedly connected to a spiral conveying blade B that is in close contact with the inner wall of the coarse filter cylinder. An injection port is provided on the bottom side wall of the injection cylinder.

[0009] It also includes a drive assembly that is poweredly connected to the coarse filter cartridge and the injection cartridge.

[0010] In the above technical solution, in order to ensure that the assembly cylinder can be stably installed on a horizontal ground and that the liquid material collected in the collection chamber can be effectively discharged, the following technical solution is provided.

[0011] An installation ring seat is fixedly connected to the outer side of the bottom of the assembly cylinder, and multiple sets of evenly distributed support feet are fixedly attached to the installation ring seat; the bottom of the material collection chamber is set as a sunken annular material collection trough, and the discharge interface is installed on the annular material collection trough.

[0012] In the above technical solution, in order to ensure that the impurity particles filtered and intercepted in the fine filter cartridge and the coarse filter cartridge can be effectively transported to the inner edge of the assembly cover through the discharge cap A and discharge cap B respectively, and to facilitate the effective discharge of the impurity particles in the assembly cover through the discharge interface, the following technical solution is provided.

[0013] The upper surface of the discharge umbrella cap B is uniformly fixed with multiple sets of guide strips evenly distributed in a ring array. The outer edge of the discharge umbrella cap B is fixed with a guide plate. The inner end of the guide plate extends to the lower surface of the discharge umbrella cap B and is in contact with the upper surface of the discharge umbrella cap A. The outer end of the guide plate is in contact with the inner wall of the assembly cover.

[0014] In the above technical solution, in order to ensure that the coarse filter cylinder and the filling cylinder can be stably installed in the assembly cylinder and the assembly cover in a relatively rotating posture, the following technical solution is provided.

[0015] The bottom of the coarse filter cartridge is in contact with the bottom wall of the assembly cartridge. A connecting sleeve is fixedly connected to the axial center of the bottom wall of the coarse filter cartridge. The connecting sleeve is rotatably installed at the bottom of the assembly cartridge and extends to the outside of the assembly cartridge. An annular assembly groove is fixedly connected to the inner wall of the top of the assembly cover. The top of the injection cylinder is rotatably installed in the annular assembly groove. The bottom wall of the injection cylinder is in contact with the bottom wall of the coarse filter cartridge. A connecting shaft is fixedly connected to the axial center of the bottom wall of the injection cylinder and rotatably installed in the connecting sleeve.

[0016] In the above technical solution, in order to ensure that the drive component can achieve a power connection with the coarse filter cylinder and the injection cylinder, and to achieve stable operation of the coarse filter cylinder and the injection cylinder in opposite directions, the following technical solution is provided.

[0017] The drive assembly includes a drive motor, a drive bevel gear A, a drive bevel gear B, a transmission bevel gear A, and a transmission bevel gear B. The transmission bevel gear A is fixedly connected to the connecting sleeve, and the transmission bevel gear B is fixedly connected to the connecting shaft and arranged in the opposite direction to the transmission bevel gear A. The output shaft of the drive motor is poweredly connected to a drive shaft, and the drive bevel gears A and B, arranged in the same direction, are fixedly connected to the drive shaft. The drive bevel gears A and B mesh with the transmission bevel gears A and B, respectively.

[0018] The beneficial effects of this utility model are:

[0019] 1. Highly efficient impurity removal: Impurity discharge caps A and B, along with matching guide strips and plates, effectively achieve immediate discharge of impurity particles. During the interception process in the fine and coarse filter cartridges, impurity particles are rapidly conveyed to the inner edge of the mounting cover by the help of the spiral conveyor blades and discharged in a timely manner through the discharge port, avoiding long-term accumulation of impurities and ensuring continuous high efficiency in the filtration process.

[0020] 2. Prevents filter cartridge clogging. In traditional filtration devices, impurities often accumulate on the inner wall of the filter cartridge, leading to clogging of the filtration channel. However, this device, through its spiral conveyor blades and impurity discharge cap design, continuously removes trapped impurities during the filtration process, keeping the filter cartridge unobstructed. This significantly reduces the risk of filter cartridge clogging and improves equipment efficiency.

[0021] 3. Reduced downtime: Because it can discharge intercepted impurities in real time, this device effectively avoids the drawbacks of traditional equipment that requires periodic shutdowns for cleaning, thereby reducing downtime for maintenance and improving production continuity and efficiency.

[0022] 4. Reduced maintenance costs: The modular design facilitates disassembly and cleaning, reducing the likelihood of equipment malfunctions due to impurity buildup. Simultaneously, the efficient operation of the impurity removal system reduces the frequency of manual cleaning and equipment maintenance, lowering overall maintenance costs.

[0023] In summary, the high-efficiency filtration device proposed in this solution not only improves filtration efficiency and extends equipment lifespan during the production of water-based coatings, but also effectively reduces the frequency of maintenance and cleaning, thereby enhancing the automation level and economic benefits of the production line. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention in cross-section.

[0026] Figure 3 This is a structural diagram of the assembly cover;

[0027] Figure 4 This is a structural diagram of the coarse filter cartridge and the components mounted on it.

[0028] Figure 5 This is a structural diagram of the injection cylinder and the components mounted on it.

[0029] Figure 6 This is a schematic diagram of the structure of the drive assembly combined with the coarse filter cartridge and the injection cylinder.

[0030] In the diagram: 1 Assembly cylinder, 11 Collection chamber, 111 Annular collection trough, 12 Discharge interface, 13 Mounting ring seat, 131 Support foot, 2 Fine filter cylinder, 21 Impurity discharge umbrella cap A, 3 Coarse filter cylinder, 31 Impurity discharge umbrella cap B, 311 Guide bar, 312 Guide plate, 32 Spiral conveyor blade A, 33 Connecting sleeve, 4 Injection cylinder, 41 Spiral conveyor blade B, 42 Injection port, 43 Connecting shaft, 5 Assembly cover, 51 Injection interface, 52 Impurity discharge interface, 53 Annular assembly groove, 6 Drive assembly, 61 Drive motor, 611 Drive shaft, 62 Drive bevel gear A, 63 Drive bevel gear B, 64 Transmission bevel gear A, 65 Transmission bevel gear B. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-6 A high-efficiency filtration device for water-based coating production includes an assembly cylinder 1, a fine filter cylinder 2, a coarse filter cylinder 3, and a filling cylinder 4 arranged concentrically from the outside to the inside, and an assembly cover 5 fixedly installed on the top of the assembly cylinder 1. The fine filter cylinder 2 is fixedly installed in the assembly cylinder 1 and forms a collection cavity 11 with the assembly cylinder 1. The coarse filter cylinder 3 is rotatably installed in the assembly cylinder 1. The filling cylinder 4 is rotatably connected to the assembly cover 5 and the coarse filter cylinder 3. The top of the assembly cover 5 has a filling port 51 that communicates with the assembly cylinder 1. The side wall of the assembly cover 5 has a waste discharge port 52. The bottom of the assembly cylinder 1 has a discharge port 12 that communicates with the collection cavity 11.

[0033] The top of the fine filter cartridge 2 is fixedly connected to a discharge cap A21 that mates with the assembly cover 5, and the top of the coarse filter cartridge 3 is fixedly connected to a discharge cap B31 that extends into the assembly cover 5. The discharge cap B31 is positioned above the discharge cap A21.

[0034] The outer wall of the coarse filter cylinder 3 is fixed with a spiral conveying blade A32 that is in close contact with the inner wall of the fine filter cylinder 2. The outer wall of the injection cylinder 4 is fixed with a spiral conveying blade B41 that is in close contact with the inner wall of the coarse filter cylinder 3. An injection port 42 is provided on the bottom side wall of the injection cylinder 4.

[0035] It also includes a drive assembly 6, which is connected to the coarse filter cylinder 3 and the feeding cylinder 4.

[0036] The assembly cylinder 1 and the assembly cover 5 adopt a split design and are fixed together by bolts, which can ensure that the fine filter cylinder 2, coarse filter cylinder 3 and filling cylinder 4 assembled inside are easy to disassemble and maintain.

[0037] In the production process of water-based coatings, it is necessary to filter insoluble impurities to ensure coating quality. When using the high-efficiency filtration device provided in this application for filtration, the liquid to be processed is injected through the injection port 51 at the top of the assembly cover 5. The liquid will fall along the injection cylinder 4 and enter the coarse filter cylinder 3 from the bottom injection port 42. After filtration by the coarse filter cylinder 3, impurities that meet the particle size requirements are intercepted inside the coarse filter cylinder 3 and continue to enter the fine filter cylinder 2. After further filtration by the fine filter cylinder 2, impurities with smaller particle sizes are intercepted and filtered. The filtered liquid enters the collection chamber 11 and is discharged in time through the discharge port 12 to ensure that there is a drop in the liquid in the coarse filter cylinder 3, the fine filter cylinder 2, and the collection chamber 11, thereby ensuring continuous and efficient filtration of the liquid.

[0038] When processing liquid feed, the drive assembly 6 drives the coarse filter cylinder 3 and the feed cylinder 4 to rotate stably around their own axis. When the feed cylinder 4 rotates, it drives the spiral conveyor blades B41 on it to rotate, thereby continuously conveying the impurity particles intercepted in the coarse filter cylinder 3 and those attached to the inner wall of the coarse filter cylinder 3 upwards. Then, they enter the edge of the inner cavity of the assembly cover 5 through the discharge cap B31. When the coarse filter cylinder 3 rotates, it drives the spiral conveyor blades A32 on it to rotate, thereby continuously conveying the impurity particles intercepted in the fine filter cylinder 2 and those attached to the inner wall of the fine filter cylinder 2 upwards. Then, they enter the edge of the inner cavity of the assembly cover 5 through the discharge cap A21. All the impurities collected in the assembly cover 5 can be discharged through the discharge port 12 opened on its side wall to avoid the accumulation of impurities in the device and affect the filtration efficiency.

[0039] To ensure that the assembly cylinder 1 can be stably installed on a horizontal ground and that the liquid material collected in the collection chamber 11 can be effectively discharged, the following technical solution is provided.

[0040] An mounting ring seat 13 is fixedly connected to the outer side of the bottom of the assembly cylinder 1, and multiple sets of evenly distributed support legs 131 are fixedly connected to the mounting ring seat 13; the bottom of the material collection chamber 11 is set as a sunken annular material collection trough 111, and the discharge interface 12 is installed on the annular material collection trough 111.

[0041] The mounting ring seat 13 can stably assemble the assembly cylinder 1, and the support foot 131 at its bottom can stably support the horizontal ground to raise the assembly cylinder 1 to a certain height, thereby ensuring the effective arrangement of the discharge interface 12, and at the same time ensuring that the drive component 6 is stably installed at the bottom of the assembly cylinder 1.

[0042] The design of the annular collection trough 111 helps the liquid material entering the collection chamber 11 to accumulate therein, and then effectively discharge it through the discharge port 12 installed on it.

[0043] To ensure that the impurity particles filtered and intercepted in the fine filter cartridge 2 and the coarse filter cartridge 3 can be effectively transported to the inner edge of the assembly cover 5 through the discharge cap A21 and discharge cap B31 respectively, and to facilitate the effective discharge of the impurity particles in the assembly cover 5 through the discharge port 12, the following technical solution is provided.

[0044] Multiple sets of guide strips 311 are uniformly fixed to the upper surface of the discharge umbrella cap B31 in a ring array. A guide plate 312 is fixed to the outer edge of the discharge umbrella cap B31. The inner end of the guide plate 312 extends to the lower surface of the discharge umbrella cap B31 and is in contact with the upper surface of the discharge umbrella cap A21. The outer end of the guide plate 312 is in contact with the inner wall of the mounting cover 5.

[0045] When the coarse filter cartridge 3 is driven by the drive assembly 6, it can synchronously drive the impurity discharge cap B31 and the guide strip 311 and guide plate 312 fixed thereon to operate synchronously. The impurity particles conveyed by the spiral conveyor blade B41 to the impurity discharge cap B31 can move outward along the guide strip 311 to the edge of the assembly cover 5 under the combined action of centrifugal force and gravity. The guide plate 312 is arranged at a certain angle and extends to the impurity discharge cap A21. The impurities conveyed by the spiral conveyor blade A32 to the impurity discharge cap A21 can be pulled outward under the action of the guide plate 312 and are also at the edge of the assembly cover 5.

[0046] Furthermore, during operation, the guide plate 312 can push the impurity particles collected at the edge of the assembly cover 5 toward the impurity discharge port 52, ensuring that the impurity particles are quickly discharged from the impurity discharge port 52.

[0047] To ensure that the coarse filter cylinder 3 and the filling cylinder 4 can be stably installed in the assembly cylinder 1 and the assembly cover 5 in a relatively rotating posture, the following technical solution is provided.

[0048] The bottom of the coarse filter cartridge 3 is in contact with the bottom wall of the assembly cartridge 1. A connecting sleeve 33 is fixedly connected to the axial center of the bottom wall of the coarse filter cartridge 3. The connecting sleeve 33 is rotatably installed at the bottom of the assembly cartridge 1 and extends to the outside of the assembly cartridge 1. An annular assembly groove 53 is fixedly connected to the inner wall of the top of the assembly cover 5. The top of the injection cartridge 4 is rotatably installed in the annular assembly groove 53. The bottom wall of the injection cartridge 4 is in contact with the bottom wall of the coarse filter cartridge 3. A connecting shaft 43 is fixedly connected to the axial center of the bottom wall of the injection cartridge 4 and rotatably installed in the connecting sleeve 33.

[0049] The connecting sleeve 33 ensures that the coarse filter cylinder 3 is stably installed in the assembly cylinder 1 in a relatively rotating manner, while the annular assembly groove 53 and the connecting shaft 43 ensure that the filling cylinder 4 is stably installed between the assembly cover 5 and the coarse filter cylinder 3 in a relatively rotating manner.

[0050] To ensure that the drive assembly 6 can achieve a power connection with the coarse filter cylinder 3 and the injection cylinder 4, and to achieve stable operation of the coarse filter cylinder 3 and the injection cylinder 4 in opposite directions, the following technical solution is provided.

[0051] The drive assembly 6 includes a drive motor 61, a drive bevel gear A62, a drive bevel gear B63, a transmission bevel gear A64, and a transmission bevel gear B65. The transmission bevel gear A64 is fixedly connected to the connecting sleeve 33, and the transmission bevel gear B65 is fixedly connected to the connecting shaft 43 and is arranged in the opposite direction to the transmission bevel gear A64. The output shaft of the drive motor 61 is poweredly connected to a drive shaft 611, and the drive bevel gears A62 and B63, which are arranged in the same direction, are fixedly connected to the drive shaft 611. The drive bevel gears A62 and B63 are respectively engaged with the transmission bevel gears A64 and B65.

[0052] To ensure that the drive motor 61, drive shaft 611, and drive bevel gears A62 and B63 mounted on them are stably installed at a specific height so as to achieve the matching meshing of the corresponding bevel gears, a pad is provided at the bottom of the drive motor 61.

[0053] When the drive motor 61 drives the drive bevel gears A62 and B63 to operate stably via the drive shaft 611, it can drive the coarse filter cylinder 3 and the feeding cylinder 4 to operate stably via the transmission bevel gears A64 and B65, respectively. Since the transmission bevel gears A64 and B65 are arranged in opposite directions, the rotation directions of the coarse filter cylinder 3 and the feeding cylinder 4 are always opposite.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this 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 this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] 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 high efficiency filtration device in the production of waterborne coatings, characterized by: The application relates to a filter device, which comprises an assembling cylinder (1), a fine filter cylinder (2), a coarse filter cylinder (3), a material injection cylinder (4) and a assembling cover (5) fixedly arranged on the top of the assembling cylinder (1) from outside to inside, the fine filter cylinder (2) is fixedly arranged in the assembling cylinder (1) and surrounded by the assembling cylinder (1) to form a material collecting cavity (11), the coarse filter cylinder (3) is rotatably arranged in the assembling cylinder (1), the material injection cylinder (4) is rotatably connected with the assembling cover (5) and the coarse filter cylinder (3), the top of the assembling cover (5) is provided with a material injection interface (51) in communication with the assembling cylinder (1), the side wall of the assembling cover (5) is provided with a impurity discharging interface (52), and the bottom of the assembling cylinder (1) is provided with a material discharging interface (12) in communication with the material collecting cavity (11). The top of the fine filter cylinder (2) is fixedly connected with an impurity discharging umbrella cap A (21) in abutment with the assembling cover (5), the top of the coarse filter cylinder (3) is fixedly connected with an impurity discharging umbrella cap B (31) extending into the assembling cover (5), and the impurity discharging umbrella cap B (31) is arranged above the impurity discharging umbrella cap A (21). The outer wall of the coarse filter cylinder (3) is fixedly connected with helical conveying leaves A (32) in abutment with the inner wall of the fine filter cylinder (2), the outer wall of the material injection cylinder (4) is fixedly connected with helical conveying leaves B (41) in abutment with the inner wall of the coarse filter cylinder (3), and the bottom side wall of the material injection cylinder (4) is provided with a material injection opening (42). The filter device further comprises a driving assembly (6) in power connection with the coarse filter cylinder (3) and the material injection cylinder (4).

2. The high-efficiency filtering device in the production of water-based paint according to claim 1, characterized in that: The bottom outer side of the assembling cylinder (1) is fixedly connected with a mounting ring seat (13), a plurality of groups of evenly distributed supporting legs (131) are fixedly connected to the mounting ring seat (13), the bottom of the material collecting cavity (11) is arranged as a sunken annular material collecting groove (111), and the material discharging interface (12) is mounted to the annular material collecting groove (111).

3. The high-efficiency filtering device in the production of water-based paint according to claim 1, characterized in that: A plurality of groups of annularly-arrayed and evenly-distributed material guiding strips (311) are fixedly connected to the upper surface of the impurity discharging umbrella cap B (31), a material guiding plate (312) is fixedly connected to the outer edge of the impurity discharging umbrella cap B (31), the inner side end of the material guiding plate (312) extends to the lower surface of the impurity discharging umbrella cap B (31) and is in abutment with the upper surface of the impurity discharging umbrella cap A (21), and the outer side end of the material guiding plate (312) is in abutment with the inner side wall of the assembling cover (5).

4. The high-efficiency filtering device in the production of water-based paint according to claim 1, characterized in that: The bottom of the coarse filter cylinder (3) is in abutment with the bottom wall of the assembling cylinder (1), a connecting sleeve (33) is fixedly connected to the bottom wall of the coarse filter cylinder (3), the connecting sleeve (33) is rotatably arranged at the bottom of the assembling cylinder (1) and extends to the outside of the assembling cylinder (1), an annular assembling groove (53) is fixedly connected to the top inner wall of the assembling cover (5), the top of the material injection cylinder (4) is rotatably arranged in the annular assembling groove (53), the bottom wall of the material injection cylinder (4) is in abutment with the bottom wall of the coarse filter cylinder (3), and a connecting shaft (43) is fixedly connected to the bottom wall of the material injection cylinder (4) and rotatably arranged in the connecting sleeve (33).

5. The high-efficiency filtering device in the production of water-based paint according to claim 4, characterized in that: The driving assembly (6) comprises a driving motor (61), a driving bevel gear A (62), a driving bevel gear B (63), a transmission bevel gear A (64) and a transmission bevel gear B (65), the transmission bevel gear A (64) is fixedly connected to the connecting sleeve (33), the transmission bevel gear B (65) is fixedly connected to the connecting shaft (43) and reversely arranged with the transmission bevel gear A (64), a driving shaft (611) is power-connected to the output shaft of the driving motor (61), the driving bevel gear A (62) and the driving bevel gear B (63) are fixedly connected to the driving shaft (611) and are arranged in the same direction, and the driving bevel gear A (62) and the driving bevel gear B (63) are respectively meshed with the transmission bevel gear A (64) and the transmission bevel gear B (65).

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