Wet mineral powder continuous dehydration device

Through the combined design of rotating barrel, mixing rod and heating wire, the problem of uneven dehydration of ore powder is solved, and the rapid and uniform dehydration effect is achieved, and the operation process is simplified.

CN223064303UActive Publication Date: 2025-07-04GANSU PEARL MINING CO LTD
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Patent Information

Application Number
CN202421798712.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-29
Publication Date
2025-07-04
Estimated Expiration
2034-07-29

AI Technical Summary

Technical Problem

The existing continuous dehydration device is prone to unevenness when dehydrating the ore powder, and requires operators to keep turning, which causes inconvenience to operation.

Method used

A continuous dehydration device for wet ore powder is designed. The combination of a rotating barrel, a stirring rod, a first gear and a driving motor is used to achieve the rotation and rotary drying of the ore powder. The heating effect of the heating wire is combined with the design of the extrusion plate and the pneumatic cylinder to achieve the extrusion dehydration of the ore powder.

Benefits of technology

The rapid and even drying and preliminary dehydration of ore powder is achieved, the dehydration efficiency is improved, and the demand for manual operation is reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of dehydration equipment, and discloses a wet mineral powder continuous dehydration device which comprises a base, and a vertical plate is fixedly installed on the front face of the base. Through the arrangement of the rotating barrel, the stirring rods, the first gear and the driving motor, when the driving motor runs, the rotating shaft drives the second gear and the eight stirring rods to rotate, wet mineral powder in the rotating barrel is turned over during rotation of the eight stirring rods, and due to the heating effect of two heating wires, the wet mineral powder can be heated by the stirring rods. Then, the wet mineral powder is gradually dried and scattered in the process of being turned over by eight stirring rods, meanwhile, a second gear drives a gear ring and a rotating barrel to rotate through a first gear, and at the moment, the dried fine mineral powder located in the rotating barrel falls into a collecting box through meshes of the rotating barrel to be collected; and therefore, the function of quickly and uniformly drying and dehydrating the wet mineral powder is realized.
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Description

Technical Field

[0001] The utility model relates to the technical field of dehydration equipment, and more specifically, the utility model relates to a continuous dehydration device for wet ore powder. Background Art

[0002] Ore powder is a general term for stone powder and its substitutes that meet engineering requirements. It is the product of crushing and processing ore, and is the first and one of the most important steps in ore processing, smelting, etc.

[0003] When operating personnel process ore powder, a continuous dehydration device is often used to dry the ore powder for subsequent processing and smelting. In the actual use of the existing continuous dehydration device, although it has the basic dehydration function, when dehydrating the ore powder, the ore powder is often laid flat inside the dehydration device by the operating personnel, and then heated rods or heating wires are used to dry and dehydrate it. During this period, the operating personnel need to constantly turn it over, otherwise the phenomenon of uneven dehydration of the ore powder will occur, which brings inconvenience to the operation of the operating personnel. Therefore, it needs to be improved. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a continuous dehydration device for wet ore powder, which has the advantage of being able to quickly and evenly dry and dehydrate wet ore powder.

[0005] To achieve the above object, the utility model provides the following technical solution: A continuous dehydration device for wet ore powder, comprising:

[0006] A base, a vertical plate is fixedly installed on the front surface of the base, a fixed box is fixedly installed on the front surface of the vertical plate, heating wires are fixedly installed on both the left and right sides inside the fixed box, and a collection box is movably sleeved inside the bottom end of the front surface of the fixed box;

[0007] A driving mechanism, the driving mechanism is arranged on the front surface of the fixed box;

[0008] A turning mechanism, the turning mechanism is arranged inside the fixed box;

[0009] Among them, the turning mechanism includes fixed blocks. The number of the fixed blocks is two. One end of each of the two fixed blocks facing away from each other is fixedly connected to the inside of the fixed box. A ring is movably connected inside the two fixed blocks. A rotating barrel is fixedly sleeved inside the ring. The back of the rotating barrel is movably sleeved inside the front of the vertical plate. A stirring rod is movably connected inside the rotating barrel. A toothed ring is fixedly installed on the front of the rotating barrel. A first gear is meshed and connected inside the toothed ring. The front of the first gear is movably connected to the inside of the fixed box. The back of the first gear is movably connected to the front of the rotating barrel. A round shaft is movably sleeved inside the first gear. One end of the front of the round shaft penetrates through the inside of the fixed box and extends to the front of the fixed box.

[0010] As a preferred technical solution of the present invention, the driving mechanism includes:

[0011] A driving motor, the back of the driving motor is fixedly connected to the front of the fixed box. The other end of the output shaft of the driving motor is fixedly sleeved with a rotating shaft. The other end of the rotating shaft penetrates through the front of the fixed box and the front of the rotating barrel and extends to the inside of the rotating barrel. The outer surface of the rotating shaft located inside the rotating barrel is fixedly sleeved with the inside of the stirring rod;

[0012] A second gear, the back of the second gear is movably connected to the front of the rotating barrel. The front of the second gear is movably connected to the inside of the fixed box. The inside of the second gear is fixedly sleeved with the outer surface of the rotating shaft. The outer surface of the second gear is meshed and connected with the outer surface of the first gear.

[0013] As a preferred technical solution of the present invention, the top of the base is fixedly installed with an extrusion box, and a limiting groove is opened at the rear of the right side of the extrusion box;

[0014] As a preferred technical solution of the present invention, a fixed frame is fixedly installed at the top of the left side of the extrusion box. The inside of the top of the fixed frame is fixedly sleeved with a first air cylinder, and the bottom end of the first air cylinder is fixedly installed with a cover plate.

[0015] As a preferred technical solution of the present invention, a square block is fixedly installed at the right side of the bottom end of the back of the extrusion box. A second air cylinder is fixedly installed on the left side of the square block. The other end of the second air cylinder is fixedly installed with a baffle. The right side of the baffle penetrates through the bottom end of the left side of the extrusion box and extends to the inside of the extrusion box. The right side of the baffle is movably connected to the right side inside the extrusion box.

[0016] As a preferred technical solution of the present utility model, a pressing plate is movably connected to the rear of the top end of the baffle plate. Both the left and right sides of the pressing plate are movably connected to the inside of the pressing box. A filter cloth is fixedly installed inside the bottom end of the pressing plate. A moving block is fixedly installed at the top end of the right side of the pressing plate, and the other end of the moving block extends to the right side of the pressing box through a limiting groove.

[0017] As a preferred technical solution of the present utility model, a moving rod is fixedly installed on the right side of the moving block. The left side of the moving rod is movably connected to the right side of the pressing box. The bottom end inside the right side of the moving rod is movably connected to a rotating rod.

[0018] As a preferred technical solution of the present utility model, a motor bracket is fixedly installed at the bottom end of the right side of the pressing box. A power motor is fixedly installed on the right side of the motor bracket. The other end of the output shaft of the power motor is fixedly sleeved with a rotating shaft. The other end of the rotating shaft penetrates through the right side of the motor bracket and extends to the inside of the motor bracket. The outer surface of the other end of the rotating shaft is fixedly sleeved with the inside of the front end of the rotating rod.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. By setting a rotating barrel, stirring rods, a first gear and a driving motor in the present utility model, when the driving motor operates, the rotating shaft will drive the second gear and eight stirring rods to rotate. At this time, the wet ore powder inside the rotating barrel will be turned over by the rotation of the eight stirring rods. Due to the heating effect of the two heating wires, the wet ore powder will gradually dry and be dispersed during the process of being turned over by the eight stirring rods. At the same time, the second gear will drive the rotating barrel to rotate through the driving teeth of the first gear. At this time, the fine ore powder that has been dried inside the rotating barrel will fall into the inside of the collection box through the mesh holes of the rotating barrel to complete the collection, thus realizing the function of quickly and evenly drying and dehydrating the wet ore powder.

[0021] 2. By setting a pressing plate, a moving rod, a rotating rod and a power motor in the present utility model, when the power motor operates, the rotating shaft will drive the rotating rod to rotate. At this time, the outer surface of the other end of the rotating rod will squeeze and push the inside of the moving rod to make the moving rod move. Due to the limiting effect of the limiting groove, the moving rod will drive the moving block to move forward. Then the moving block will drive the pressing plate to move forward. At this time, the pressing plate will squeeze the wet ore powder inside the pressing box during the forward movement. Subsequently, the water in the wet ore powder will be discharged to the rear of the pressing plate through the filter cloth, thus realizing the function of quickly preliminarily drying the water in the wet ore powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a rear view structural schematic diagram of the present utility model;

[0024] Figure 3 is a sectional view structural schematic diagram of the present utility model;

[0025] Figure 4 is a sectional view structural schematic diagram of the fixed box of the present utility model;

[0026] Figure 5 is a sectional view structural schematic diagram of the drive motor of the present utility model;

[0027] Figure 6 is a sectional view structural schematic diagram of the extrusion box of the present utility model.

[0028] In the figure: 1, base; 2, vertical plate; 3, fixed box; 4, heating wire; 5, collection box; 6, fixed block; 7, ring; 8, rotating barrel; 9, stirring rod; 10, toothed ring; 11, first gear; 12, round shaft; 13, drive motor; 14, rotating shaft; 15, second gear; 16, extrusion box; 17, fixing bracket; 18, first air cylinder; 19, cover plate; 20, square block; 21, second air cylinder; 22, baffle; 23, extrusion plate; 24, filter cloth; 25, limiting groove; 26, moving block; 27, moving rod; 28, rotating rod; 29, motor support; 30, power motor; 31, rotating shaft. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As Figures 1 to 6 shown, the present utility model provides a wet ore powder continuous dehydration device, including:

[0031] A base 1, on the front surface of the base 1, a vertical plate 2 is fixedly installed, on the front surface of the vertical plate 2, a fixed box 3 is fixedly installed, on both left and right sides inside the fixed box 3, heating wires 4 are fixedly installed, and inside the bottom end of the front surface of the fixed box 3, a collection box 5 is movably sleeved;

[0032] A driving mechanism, which is arranged on the front surface of the fixed box 3;

[0033] A turning mechanism, which is arranged inside the fixed box 3;

[0034] Among them, the turning mechanism includes fixed blocks 6. The number of fixed blocks 6 is two. One end of each of the two fixed blocks 6 facing away from each other is fixedly connected to the inside of the fixed box 3. A circular ring 7 is movably connected inside the two fixed blocks 6. A rotating barrel 8 is fixedly sleeved inside the circular ring 7. The back surface of the rotating barrel 8 is movably sleeved inside the front surface of the vertical plate 2. A stirring rod 9 is movably connected inside the rotating barrel 8. A toothed ring 10 is fixedly installed on the front surface of the rotating barrel 8. A first gear 11 is meshed and connected inside the toothed ring 10. The front surface of the first gear 11 is movably connected to the inside of the fixed box 3. The back surface of the first gear 11 is movably connected to the front surface of the rotating barrel 8. A round shaft 12 is movably sleeved inside the first gear 11. One end of the front of the round shaft 12 penetrates through the inside of the fixed box 3 and extends to the front of the fixed box 3.

[0035] When the eight stirring rods 9 rotate inside the rotating barrel 8, the wet mineral powder inside the rotating barrel 8 can be fully turned over. When the first gear 11 rotates, it will drive the whole rotating barrel 8 to rotate through the toothed ring 10. Since the outer surface of the rotating barrel 8 is designed with mesh holes, the fine dry mineral powder smaller than the diameter of its mesh holes will move to the outside of the rotating barrel 8.

[0036] Among them, the driving mechanism includes:

[0037] A driving motor 13. The back surface of the driving motor 13 is fixedly connected to the front surface of the fixed box 3. The other end of the output shaft of the driving motor 13 is fixedly sleeved with a rotating shaft 14. The other end of the rotating shaft 14 penetrates through the front surface of the fixed box 3 and the front surface of the rotating barrel 8 and extends to the inside of the rotating barrel 8. The outer surface of the rotating shaft 14 located inside the rotating barrel 8 is fixedly sleeved with the inside of the stirring rod 9;

[0038] A second gear 15. The back surface of the second gear 15 is movably connected to the front surface of the rotating barrel 8. The front surface of the second gear 15 is movably connected to the inside of the fixed box 3. The inside of the second gear 15 is fixedly sleeved with the outer surface of the rotating shaft 14. The outer surface of the second gear 15 is meshed and connected with the outer surface of the first gear 11.

[0039] When the driving motor 13 operates, at this time the rotating shaft 14 will drive the second gear 15 and the eight stirring rods 9 to rotate simultaneously. When the second gear 15 rotates, it will drive the first gear 11 to rotate.

[0040] Among them, an extrusion box 16 is fixedly installed at the top of the base 1. A limiting groove 25 is opened at the rear of the right side of the extrusion box 16;

[0041] Due to the design of the limiting groove 25, the object located inside it will be limited, so that it can only move back and forth.

[0042] Among them, a fixing frame 17 is fixedly installed at the top end on the left side of the extrusion box 16. The inside of the top end of the fixing frame 17 is fixedly sleeved with a first air cylinder 18, and the bottom end of the first air cylinder 18 is fixedly installed with a cover plate 19.

[0043] When the first air cylinder 18 operates, at this time the cover plate 19 will move downward.

[0044] Among them, a square block 20 is fixedly installed at the right side of the bottom end on the back of the extrusion box 16. A second air cylinder 21 is fixedly installed on the left side of the square block 20. The other end of the second air cylinder 21 is fixedly installed with a baffle 22. The right side of the baffle 22 penetrates through the bottom end on the left side of the extrusion box 16 and extends into the inside of the extrusion box 16. The right side of the baffle 22 is movably connected to the right side inside the extrusion box 16.

[0045] When the second air cylinder 21 operates, at this time the baffle 22 will move leftward driven by the second air cylinder 21. At this time, the baffle 22 will release the blocking effect on the materials at the top end of the extrusion box 16 during the leftward movement.

[0046] Among them, an extrusion plate 23 is movably connected to the rear of the top end of the baffle 22. The left and right sides of the extrusion plate 23 are both movably connected to the inside of the extrusion box 16. A filter cloth 24 is fixedly installed inside the bottom end of the extrusion plate 23. A moving block 26 is fixedly installed at the top end on the right side of the extrusion plate 23. The other end of the moving block 26 extends to the right side of the extrusion box 16 through a limiting groove 25.

[0047] Due to the limiting effect of the limiting groove 25, when the moving block 26 drives the extrusion plate 23 to move forward along the inside of the extrusion box 16, at this time the wet ore powder in the extrusion box 16 will be extruded and dehydrated during the forward movement of the extrusion plate 23. Due to the design of the filter cloth 24, the water in the wet ore powder can be discharged to the rear of the extrusion plate 23 through the filter cloth 24.

[0048] Among them, a moving rod 27 is fixedly installed on the right side of the moving block 26. The left side of the moving rod 27 is movably connected to the right side of the extrusion box 16. The bottom end inside the right side of the moving rod 27 is movably connected to a rotating rod 28.

[0049] When the outer surface of the left rear of the rotating rod 28 squeezes and pushes the inside of the moving rod 27, at this time the moving rod 27 will drive the moving block 26 to move forward along the inside of the limiting groove 25.

[0050] Among them, a motor bracket 29 is fixedly installed at the bottom end on the right side of the extrusion box 16. A power motor 30 is fixedly installed on the right side of the motor bracket 29. The other end of the output shaft of the power motor 30 is fixedly sleeved with a rotating shaft 31. The other end of the rotating shaft 31 penetrates through the right side of the motor bracket 29 and extends into the inside of the motor bracket 29. The outer surface of the other end of the rotating shaft 31 is fixedly sleeved with the inside of the front end of the rotating rod 28.

[0051] When the power motor 30 operates, the rotating shaft 31 will drive the rotating rod 28 to rotate. At this time, the outer surface at the rear left side of the rotating rod 28 will squeeze and push the inside of the moving rod 27.

[0052] The working principle and usage process of the present utility model are as follows:

[0053] First, the operator puts wet ore powder into the inside of the extrusion box 16. Subsequently, the operator starts the first air cylinder 18. At this time, the other end of the first air cylinder 18 will drive the cover plate 19 to move downward. When the bottom end of the cover plate 19 contacts the top end of the extrusion box 16, the operator starts the power motor 30. At this time, the rotating shaft 31 will drive the rotating rod 28 to rotate. Subsequently, the outer surface at the rear left side of the rotating rod 28 will squeeze the inside of the moving rod 27 during rotation, causing the moving rod 27 to move. Immediately afterwards, the moving rod 27 will drive the moving block 26 to move. Due to the design inside the limiting groove 25, the movement of the moving block 26 will be limited, enabling it to only move back and forth. At this time, the moving rod 27 will drive the moving block 26 to move forward. At this time, the entire extrusion plate 23 will drive along the inside of the extrusion box 16 under the drive of the moving block 26. At this time, the wet ore powder located inside the extrusion box 16 will be squeezed during the forward movement of the extrusion plate 23. During this process, the moisture in the wet ore powder will be discharged to the rear of the extrusion plate 23 through the filter cloth 24, thus realizing the function of quickly preliminarily drying the moisture in the wet ore powder. Subsequently, the operator starts the second air cylinder 21. At this time, the other end of the second air cylinder 21 will drive the baffle 22 to move leftward. At this time, the top end of the baffle 22 will release the blocking effect on the wet ore powder inside the extrusion box 16 during the leftward movement. Subsequently, the wet ore powder inside the extrusion box 16 will move to the inside of the top end of the base 1 under the influence of gravity. Due to the inclined design inside the top end of the base 1, these wet ore powders will then move to the inside of the rotating barrel 8 through the vertical plate 2.

[0054] Immediately afterwards, the operator simultaneously activates the two heating wires 4, and then the operator activates the drive motor 13. At this time, the rotating shaft 14 will drive the eight stirring rods 9 to rotate inside the rotating barrel 8. At this time, the wet mineral powder located inside the rotating barrel 8 will be continuously turned over during the rotation of the eight stirring rods 9. Due to the heating and drying effect of the two heating wires 4, during this process, the large-volume agglomerated wet mineral powder will be broken up under continuous turning. At the same time, the second gear 15 will also rotate driven by the rotating shaft 14. Immediately afterwards, the first gear 11 will rotate in the opposite direction driven by the second gear 15. Subsequently, the first gear 11 will drive the rotating barrel 8 to rotate through the toothed ring 10, thereby further increasing the movement amplitude of the wet mineral powder inside the rotating barrel 8. And during this process, the dried fine mineral powder particles will fall into the inside of the collection box 5 through the mesh holes of the rotating barrel 8 to complete the collection, further improving the drying efficiency inside the rotating barrel 8, and thus realizing the function of quickly and evenly drying and dehydrating the wet mineral powder.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous dehydration device for wet mineral powder, characterized in that, It includes: A base (1), on the front of the base (1), a vertical plate (2) is fixedly installed, on the front of the vertical plate (2), a fixed box (3) is fixedly installed, on both the left and right sides inside the fixed box (3), heating wires (4) are fixedly installed, and inside the bottom end of the front of the fixed box (3), a collection box (5) is movably sleeved; A driving mechanism, which is arranged on the front of the fixed box (3); A turning mechanism, which is arranged inside the fixed box (3); Among them, the turning mechanism includes fixing blocks (6), the number of the fixing blocks (6) is two, and at the opposite ends of the two fixing blocks (6), they are fixedly connected to the inside of the fixed box (3). Inside the two fixing blocks (6), a ring (7) is movably connected. Inside the ring (7), a rotating barrel (8) is fixedly sleeved. The back of the rotating barrel (8) is movably sleeved with the inside of the front of the vertical plate (2). Inside the rotating barrel (8), a stirring rod (9) is movably connected. On the front of the rotating barrel (8), a toothed ring (10) is fixedly installed. Inside the toothed ring (10), a first gear (11) is meshed. The front of the first gear (11) is movably connected to the inside of the fixed box (3), and the back of the first gear (11) is movably connected to the front of the rotating barrel (8). Inside the first gear (11), a round shaft (12) is movably sleeved, and the front end of the round shaft (12) extends through the inside of the fixed box (3) and to the front of the fixed box (3).

2. The continuous dehydration device for wet mineral powder according to claim 1, characterized in that: The driving mechanism includes: A driving motor (13), the back of the driving motor (13) is fixedly connected to the front of the fixed box (3), and at the other end of the output shaft of the driving motor (13), a rotating shaft (14) is fixedly sleeved. The other end of the rotating shaft (14) respectively passes through the front of the fixed box (3) and the front of the rotating barrel (8) and extends to the inside of the rotating barrel (8). The outer surface of the rotating shaft (14) located inside the rotating barrel (8) is fixedly sleeved with the inside of the stirring rod (9); A second gear (15), the back of the second gear (15) is movably connected to the front of the rotating barrel (8), the front of the second gear (15) is movably connected to the inside of the fixed box (3), the inside of the second gear (15) is fixedly sleeved with the outer surface of the rotating shaft (14), and the outer surface of the second gear (15) is meshed with the outer surface of the first gear (11).

3. A continuous dehydration device for wet ore powder according to claim 1, characterized in that: At the top of the base (1), an extrusion box (16) is fixedly installed, and a limiting groove (25) is opened at the rear of the right side of the extrusion box (16).

4. The continuous dehydration device for wet mineral powder according to claim 3, characterized in that: At the top of the left side of the extrusion box (16), a fixed frame (17) is fixedly installed, and inside the top of the fixed frame (17), a first air cylinder (18) is fixedly sleeved, and at the bottom end of the first air cylinder (18), a cover plate (19) is fixedly installed.

5. The continuous dehydration device for wet ore powder according to claim 3, wherein: On the right side of the bottom end of the back surface of the extrusion box (16), a square block (20) is fixedly installed. On the left side of the square block (20), a second air cylinder (21) is fixedly installed. The other end of the second air cylinder (21) is fixedly installed with a baffle (22). The right side of the baffle (22) penetrates through the bottom end of the left side of the extrusion box (16) and extends into the interior of the extrusion box (16). The right side of the baffle (22) is movably connected to the right side inside the extrusion box (16).

6. The continuous dehydration device for wet mineral powder according to claim 5, characterized in that: At the rear of the top end of the baffle (22), an extrusion plate (23) is movably connected. The left and right sides of the extrusion plate (23) are both movably connected to the interior of the extrusion box (16). Inside the bottom end of the extrusion plate (23), a filter cloth (24) is fixedly installed. At the top end of the right side of the extrusion plate (23), a moving block (26) is fixedly installed. The other end of the moving block (26) extends to the right side of the extrusion box (16) through a limiting groove (25).

7. The continuous dehydration device for wet mineral powder according to claim 6, wherein: On the right side of the moving block (26), a moving rod (27) is fixedly installed. The left side of the moving rod (27) is movably connected to the right side of the extrusion box (16). At the bottom end inside the right side of the moving rod (27), a rotating rod (28) is movably connected.

8. A continuous dehydration device for wet ore powder according to claim 3, characterized in that: At the bottom end of the right side of the extrusion box (16), a motor bracket (29) is fixedly installed. On the right side of the motor bracket (29), a power motor (30) is fixedly installed. The other end of the output shaft of the power motor (30) is fixedly sleeved with a rotating shaft (31). The other end of the rotating shaft (31) penetrates through the right side of the motor bracket (29) and extends into the interior of the motor bracket (29). The outer surface of the other end of the rotating shaft (31) is fixedly sleeved with the inside of the front end of the rotating rod (28).