Ore pulp impurity removal stirrer for flotation process

Abstract

The ore pulp impurity removal stirrer comprises a stirring tank, the side, close to the top, of the outer cylindrical surface of the stirring tank is communicated with a feeding pipe, the other end of the feeding pipe is connected with a filtering device, the side, close to the bottom, of the outer cylindrical surface of the stirring tank is communicated with a discharging pipe, and a flow meter is arranged on the discharging pipe. A stirring mechanism is arranged in the stirring tank and connected with a driving unit, and the driving unit is connected with the top end of the stirring tank. By the adoption of the technical scheme, ore pulp can be filtered, continuous feeding operation can be achieved, and the ore pulp filtering device has the advantages of being convenient to use and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of ore dressing equipment, and particularly relates to a slurry impurity removal mixer for a flotation process. Background Technique

[0002] Ore dressing is to process the raw ore mined from the mine, enrich the useful minerals and discard the useless gangue. The enriched useful minerals are called concentrates for smelting metals, and the gangue is discarded as tailings. Flotation is a beneficiation method that separates according to the differences in the physicochemical properties of the surfaces of mineral particles and the floatability of minerals. It is to use various agents to adjust the physicochemical properties of the surfaces of various mineral particles and the flotation medium to expand the hydrophobic-hydrophilicity, that is, the floatability differences among various minerals and improve the flotation efficiency.

[0003] In the flotation process of ore dressing, the slurry stirring tank regulates the rapid and uniform mixing of the slurry and the agent, providing good conditions for flotation. The slurry stirring tank is an essential equipment for the flotation process in mine ore dressing production. Its main function is to fully carry out chemical reactions between the milled and classified overflow slurry and the flotation agent before separation to achieve the expected separation effect. In actual operation, due to the residues left over from the blasting operation during the mining process, there are many impurities in the slurry. These impurities will cause adverse interference to the subsequent processes, so they need to be removed. In the flotation process of ores, a stirring tank is often needed to adjust the slurry, but the current stirring tanks generally only have a mechanical stirring function and do not have the function of filtering impurities. Moreover, ordinary filtering devices generally need to clean the filter screen regularly, resulting in downtime and delaying work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a slurry impurity removal mixer for a flotation process, which solves the problem that the existing slurry stirring equipment does not have the function of filtering impurities.

[0005] The technical solution adopted by the utility model is: it includes a stirring tank. A feeding pipe is connected to the outer cylindrical surface of the stirring tank near the top side, and the other end of the feeding pipe is connected to a filtering device. A discharging pipe is connected to the outer cylindrical surface of the stirring tank near the bottom side. A stirring mechanism is arranged inside the stirring tank. The stirring mechanism is connected with a driving unit, and the driving unit is connected to the top end of the stirring tank.

[0006] The characteristics of the utility model also lie in:

[0007] The stirring mechanism includes a stirring shaft, which is rotatably connected to the center of the top of the stirring tank through a bearing. A stirring impeller is fixedly connected to one end of the stirring shaft. The stirring impeller is located inside the stirring tank and also includes a plurality of ridges. The ridges are in the shape of long sheets, one side of the ridges is a plane, and the other side of the ridges is a wavy curved surface. One side of the plane of the ridges is fixedly connected to the inner wall of the stirring tank, and the length direction of the ridges is parallel to the axis of the stirring tank. The plurality of ridges are staggered and distributed at different heights on the inner wall of the cavity of the stirring tank.

[0008] The driving unit includes a driving motor, the base of the driving motor is fixedly connected to the top of the stirring tank by bolts, a pulley is provided on the rotating shaft of the driving motor, and the driving unit also includes a stirring shaft. The driving unit also includes a transmission wheel, the rotating shaft of the transmission wheel is fixedly connected to one end of the stirring shaft, and a transmission belt is connected between the transmission wheel and the rotating shaft of the driving motor.

[0009] The filtering device includes a common bottom tank, which has a hemispherical closed structure. A first feed cylinder and a second feed cylinder are connected through the circular plane of the common bottom tank. The first feed cylinder and the second feed cylinder are symmetrically distributed along the center of the circular plane of the common bottom tank. The first feed cylinder and the second feed cylinder are both cylindrical cylinders. The inner walls of the first feed cylinder and the second feed cylinder are respectively connected with filter elements. A median rotating shaft is arranged near the bottom surface of the circular plane of the common bottom tank. Both ends of the median rotating shaft are respectively connected to the spherical surface of the common bottom tank for rotation. One end of the median rotating shaft passes through the spherical surface of the common bottom tank. The median rotating shaft is arranged on the symmetrical plane of the first feed cylinder and the second feed cylinder.

[0010] One end of the middle rotating shaft passing through the common bottom tank is fixedly connected to a control wheel, and a locking piece is also fixedly connected to the common bottom tank. The locking piece is provided with a through hole, and the middle rotating shaft also passes through the through hole of the locking piece. The locking piece is also provided with a locking screw blind hole, which is perpendicular to and connected to the through hole of the locking piece, and a locking pin is threadedly connected in the locking screw blind hole.

[0011] The beneficial effects of the utility model are:

[0012] The utility model adopts a first feed barrel and a second feed barrel that are parallel to each other and vertically connected at the top of a common bottom tank. The tops of the first feed barrel and the second feed barrel are both feed ports. Filters are placed horizontally in the barrels of the first feed barrel and the second feed barrel. A median rotating shaft is arranged inside the common bottom tank, and a swing plate is installed on the median rotating shaft. The control wheel controls the swing plate to rotate left or right. The utility model can filter the ore pulp, and the first feed barrel and the second feed barrel are operated alternately, so that the feeding can be operated continuously, and the filter can be cleaned without stopping the machine, which is convenient and efficient.

[0013] When the middle rotating shaft swings to the left, the swing plate will reach the lower position of the first feed barrel to block the first feed barrel, and when the middle rotating shaft swings to the right, the swing plate will reach the lower position of the second feed barrel to block the second feed barrel. A locking piece is provided on the outside of the common bottom tank, and the locking pin locks the middle rotating shaft and the locking piece to limit the position. The utility model cleverly utilizes the first feed barrel and the second feed barrel to work alternately, ensures the continuous operation of feeding, and improves work efficiency.

[0014] The utility model has a plurality of ridges distributed along the radial direction of the tank body on the inner wall of the cavity of the mixing tank, and the ridges are all arranged vertically and staggered at different heights in the cavity of the mixing tank, and each ridge is vertically wavy. The staggered wavy ridges can make the slurry collide with each other when the impeller stirs the slurry, so as to fully mix and stir, thereby improving the stirring efficiency.

[0015] The utility model arranges a flow meter on the discharge pipe, and the control operation of the mid-position rotating shaft and the flow meter arranged at the discharge pipe on the mixing tank cooperate with each other, and feedback linkage control is formed between the two to realize flow operation and maintain continuous and efficient work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a pulp impurity removal mixer used in a flotation process according to the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the filter device of the utility model;

[0018] Figure 3 It is a front view structural schematic diagram of the filtering device of the utility model;

[0019] Figure 4 This is a bottom view structural diagram of the filter device of the utility model;

[0020] Figure 5 It is a partial structural schematic diagram of the filtering device of the present utility model.

[0021] In the figure: 1. stirring tank; 2. stirring shaft; 3. stirring impeller; 4. driving unit; 5. filtering device; 6. feeding pipe; 7. discharging pipe; 8. driving motor; 9. driving belt; 10. driving wheel; 11. ridge; 12. first feeding barrel; 13. second feeding barrel; 14. common bottom tank; 15. filtering element; 16. swinging plate; 17. middle rotating shaft; 18. operating wheel; 19. locking element; 20. locking pin. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0023] likeFigures 1 to 5 As shown in Figures 1 to 5 , the pulp impurity removal mixer for flotation process of the present utility model includes a mixing tank 1, a mixing shaft 2, a mixing impeller 3, a driving unit 4 and a filtering device 5. The mixing shaft 2 is vertically arranged inside the mixing tank 1. The mixing shaft 2 extends from the top of the mixing tank 1 into the cavity of the mixing tank 1. The mixing impeller 3 is installed on the mixing shaft 2 inside the cavity of the mixing tank 1. The mixing shaft 2 drives the mixing impeller 3 to rotate, and the mixing impeller 3 stirs the pulp in the mixing tank 1. A feeding pipe 6 extending into the cavity of the mixing tank 1 is provided on one outer wall of the mixing tank 1, and a discharging pipe 7 extending out of the cavity of the mixing tank 1 is provided on the other outer wall. A flow meter is arranged on the discharging pipe 7 to monitor the discharging flow rate of the discharging pipe 7. The filtering device 5 is arranged outside the mixing tank 1 and is connected to the feeding pipe 6. The pulp filtered by the filtering device 5 flows into the cavity of the mixing tank 1 through the feeding pipe 6.

[0024] A driving unit 4 is provided on the top of the mixing tank 1. The driving unit 4 is connected to the mixing shaft 2, and the driving unit 4 drives the mixing shaft 2 to rotate and stir. The driving unit 4 includes a driving motor 8, a transmission belt 9 and a transmission wheel 10. The transmission wheel 10 is coaxially connected to the top end of the mixing shaft 2. The driving motor 8 has a transmission output wheel. The driving motor 8 is connected to the transmission wheel 10 through the transmission belt 9 to form a transmission mechanism, and the driving motor 8 drives the transmission wheel 10 and the mixing shaft 2 to rotate.

[0025] A number of ridges 11 are radially distributed along the inner wall of the cavity of the mixing tank 1. The ridges 11 are all vertically arranged and are staggeredly distributed at different heights inside the cavity of the mixing tank 1. Each ridge 11 has a wavy shape in the vertical direction. The use of the staggeredly distributed wavy ridges 11 can cause the pulp to collide with each other when the mixing impeller 3 stirs the pulp, so as to be fully mixed and stirred, and improve the stirring efficiency.

[0026] The filtering device 5 arranged outside the mixing tank 1 includes a first feeding cylinder 12, a second feeding cylinder 13, a common bottom tank 14, a filtering element 15 and a swing plate 16. The first feeding cylinder 12 and the second feeding cylinder 13 are both cylindrical barrels, and are vertically and parallelly connected to the top of the common bottom tank 14. The common bottom tank 14 is a hemispherical closed structure. The top of the common bottom tank 14 is a circular plate that closes the inner hemisphere. The first feeding cylinder 12 and the second feeding cylinder 13 are erected on the circular plate at the top of the common bottom tank 14 and are both communicated with the inside of the common bottom tank 14.

[0027] Inside the cylinder of the first feed cylinder 12, a filter element 15 is horizontally placed. The filter element 15 is a filter plate or a filter basket. The pulp flows downward from above the filter element 15, and the filter element 15 plays a role in filtering the pulp. A filter element 15 is also provided inside the cylinder of the second feed cylinder 13, which can also play a role in filtering the pulp. The tops of the first feed cylinder 12 and the second feed cylinder 13 are both feed inlets, and the bottom of the shared bottom tank 14 is a discharge outlet.

[0028] Inside the hemisphere of the shared bottom tank 14, between the first feed cylinder 12 and the second feed cylinder 13, a horizontally arranged middle-position rotating shaft 17 is provided. A semi-circular swing plate 16 is installed on the middle-position rotating shaft 17, and the swing plate 16 can swing through an angle of 180° following the middle-position rotating shaft 17. The swing plate 16 adopts an arc structure so that it can adapt to the inner part of the hemisphere of the shared bottom tank 14. When the middle-position rotating shaft 17 swings to the left, the swing plate 16 will reach the position below the first feed cylinder 12 to block the first feed cylinder 12. When the middle-position rotating shaft 17 swings to the right, the swing plate 16 will reach the position below the second feed cylinder 13 to block the second feed cylinder 13.

[0029] One end of the middle-position rotating shaft 17 passing through the shared bottom tank 14 is fixedly connected with a control rotating wheel 18. A locking member 19 is also fixedly connected to the shared bottom tank 14. The locking member 19 is provided with a through hole, and the middle-position rotating shaft 17 also passes through the through hole of the locking member 19. A locking screw blind hole is also opened on the locking member 19. The locking screw blind hole is perpendicular and communicated with the through hole of the locking member 19. A locking plug 20 is connected to the locking screw blind hole by thread. The end of the locking plug 20 abuts against the middle-position rotating shaft 17 to lock and limit the middle-position rotating shaft 17, thereby realizing the fixing of the swing angle of the swing plate 16.

[0030] The working principle of the pulp impurity removal mixer for the flotation process provided by the present utility model is as follows:

[0031] When the utility model is implemented, first connect the bottom feeding port of the common bottom tank 14 of the filtering device 5 with the feeding pipe 6 of the stirring tank 1. The tops of the first feeding cylinder 12 and the second feeding cylinder 13 are both feeding ports. In actual use, only the first feeding cylinder 12 or the second feeding cylinder 13 is used for feeding. Taking the first feeding cylinder 12 as an example, a filtering member 15 is horizontally placed in the cylinder body of the first feeding cylinder 12. The filtering member 15 is a filter plate or a filter basket. The pulp flows downward from above the filtering member 15, and the filtering member 15 plays a role in filtering the pulp. The impurities in the pulp are blocked and filtered by the filtering member 15. The bottom of the common bottom tank 14 is a feeding port. The filtered pulp enters the cavity of the stirring tank 1 through the feeding pipe 6. After a certain amount of pulp accumulates in the cavity of the stirring tank 1, the driving unit 4 starts to work. The driving unit 4 drives the stirring shaft 2 and the stirring impeller 3 to stir the pulp in the stirring tank 1, and discharges the stirred pulp outward through the discharge pipe 7 to enter the next process.

[0032] In the above process, the swing plate 16 maintains the position of swinging to the right. The swing plate 16 is located below the second feeding cylinder 13 to block the second feeding cylinder 13 and prevent the pulp from flowing back into the cylinder of the second feeding cylinder 13. Although the swing plate 16 can swing 180° along with the middle-position rotating shaft 17, the swing angle of the swing plate 16 is fixed by locking and limiting the middle-position rotating shaft 17 and the locking member 19 through the locking pin 20.

[0033] When it is necessary to clean the filtering member 15 inside the first feeding cylinder 12 and remove the impurities formed by filtering, it is necessary to stop the feeding of the first feeding cylinder 12 and instead feed through the second feeding cylinder 13, and the two perform replacement work. Specifically, the operation is carried out through the middle-position rotating shaft 17 provided at one end of the swing plate 16. The middle-position rotating shaft 17 can rotate the swing plate 16 through mechanical control or manual operation. When the swing plate 16 swings to the left, the swing plate 16 will reach the position below the first feeding cylinder 12 to block the first feeding cylinder 12, and the lower part of the second feeding cylinder 13 is opened for normal feeding. During the entire replacement operation process, there is no need to stop production, which can significantly improve production efficiency. Since the middle-position rotating shaft 17 can be mechanically controlled, the control operation of the middle-position rotating shaft 17 can cooperate with the flowmeter provided at the discharge pipe 7 of the stirring tank 1, and a feedback linkage control is formed between the two to realize continuous operation and maintain continuous and efficient work.

[0034] Embodiment 1

[0035] As Figure 1As shown, the slurry impurity removal mixer for flotation process proposed in this embodiment includes a stirring tank 1, the outer cylindrical surface of the stirring tank 1 is connected to a feeding pipe 6 near the top side, the other end of the feeding pipe 6 is connected to a filtering device 5, the outer cylindrical surface of the stirring tank 1 is connected to a discharge pipe 7 near the bottom side, the discharge pipe 7 is provided with a flow meter, a stirring mechanism is provided inside the stirring tank 1, the stirring mechanism is connected to a driving unit 4, and the driving unit 4 is connected to the top of the stirring tank 1.

[0036] Example 2

[0037] like Figures 1 - 3 As shown, the slurry impurity removal mixer for flotation process proposed in this embodiment includes a mixing tank 1, a feeding pipe 6 is connected to the outer cylindrical surface of the mixing tank 1 near the top, and the other end of the feeding pipe 6 is connected to a filtering device 5, a discharge pipe 7 is connected to the outer cylindrical surface of the mixing tank 1 near the bottom, and a flow meter is arranged on the discharge pipe 7, and a mixing mechanism is arranged inside the mixing tank 1, and the mixing mechanism is connected to a driving unit 4, and the driving unit 4 is connected to the top of the mixing tank 1. The mixing mechanism includes a mixing shaft 2, which is rotatably connected to the center of the top of the mixing tank 1 through a bearing, and a mixing impeller 3 is fixedly connected to one end of the mixing shaft 2, and the mixing impeller 3 is located inside the mixing tank 1, and also includes a plurality of ridges 11, the ridges 11 are in the shape of long sheets, one side of the ridges 11 is a plane, and the other side of the ridges 11 is a wavy curved surface, one side of the plane of the ridges 11 is fixedly connected to the inner wall of the mixing tank 1, the length direction of the ridges 11 is parallel to the axis of the mixing tank 1, and the plurality of ridges 11 are staggered and distributed at different heights of the inner wall of the cavity of the mixing tank 1. The driving unit 4 includes a driving motor 8, the base of the driving motor 8 is fixedly connected to the top of the stirring tank 1 by bolts, a pulley is provided on the rotating shaft of the driving motor 8, and also includes a stirring shaft 2. The driving unit 4 also includes a transmission wheel 10, the rotating shaft of the transmission wheel 10 is fixedly connected to one end of the stirring shaft 2, and a transmission belt 9 is connected between the transmission wheel 10 and the rotating shaft of the driving motor 8. The filtering device 5 includes a common bottom tank 14, which has a hemispherical closed structure. The first feed cylinder 12 and the second feed cylinder 13 are connected through the circular plane of the common bottom tank 14. The first feed cylinder 12 and the second feed cylinder 13 are symmetrically distributed along the center of the circular plane of the common bottom tank 14. The first feed cylinder 12 and the second feed cylinder 13 are both cylindrical cylinders. The inner walls of the first feed cylinder 12 and the second feed cylinder 13 are respectively connected with filter elements 15. A median rotating shaft 17 is arranged near the bottom surface of the circular plane of the common bottom tank 14. Both ends of the median rotating shaft 17 are respectively rotatably connected to the spherical surface of the common bottom tank 14. One end of the median rotating shaft 17 passes through the spherical surface of the common bottom tank 14. The median rotating shaft 17 is arranged on the symmetrical plane of the first feed cylinder 12 and the second feed cylinder 13.

[0038] Example 3

[0039] like Figures 1 - 5As shown, the slurry impurity removal mixer for flotation process proposed in this embodiment includes a mixing tank 1, a feeding pipe 6 is connected to the outer cylindrical surface of the mixing tank 1 near the top, and the other end of the feeding pipe 6 is connected to a filtering device 5, a discharge pipe 7 is connected to the outer cylindrical surface of the mixing tank 1 near the bottom, and a flow meter is arranged on the discharge pipe 7, and a mixing mechanism is arranged inside the mixing tank 1, and the mixing mechanism is connected to a driving unit 4, and the driving unit 4 is connected to the top of the mixing tank 1. The mixing mechanism includes a mixing shaft 2, which is rotatably connected to the center of the top of the mixing tank 1 through a bearing, and a mixing impeller 3 is fixedly connected to one end of the mixing shaft 2, and the mixing impeller 3 is located inside the mixing tank 1, and also includes a plurality of ridges 11, the ridges 11 are in the shape of long sheets, one side of the ridges 11 is a plane, and the other side of the ridges 11 is a wavy curved surface, one side of the plane of the ridges 11 is fixedly connected to the inner wall of the mixing tank 1, the length direction of the ridges 11 is parallel to the axis of the mixing tank 1, and the plurality of ridges 11 are staggered and distributed at different heights of the inner wall of the cavity of the mixing tank 1. The driving unit 4 includes a driving motor 8, the base of the driving motor 8 is fixedly connected to the top of the stirring tank 1 by bolts, a pulley is provided on the rotating shaft of the driving motor 8, and also includes a stirring shaft 2. The driving unit 4 also includes a transmission wheel 10, the rotating shaft of the transmission wheel 10 is fixedly connected to one end of the stirring shaft 2, and a transmission belt 9 is connected between the transmission wheel 10 and the rotating shaft of the driving motor 8. The filtering device 5 includes a common bottom tank 14, which has a hemispherical closed structure. The first feed cylinder 12 and the second feed cylinder 13 are connected through the circular plane of the common bottom tank 14. The first feed cylinder 12 and the second feed cylinder 13 are symmetrically distributed along the center of the circular plane of the common bottom tank 14. The first feed cylinder 12 and the second feed cylinder 13 are both cylindrical cylinders. The inner walls of the first feed cylinder 12 and the second feed cylinder 13 are respectively connected with filter elements 15. A median rotating shaft 17 is arranged near the bottom surface of the circular plane of the common bottom tank 14. Both ends of the median rotating shaft 17 are respectively rotatably connected to the spherical surface of the common bottom tank 14. One end of the median rotating shaft 17 passes through the spherical surface of the common bottom tank 14. The median rotating shaft 17 is arranged on the symmetrical plane of the first feed cylinder 12 and the second feed cylinder 13. One end of the median rotating shaft 17 passing through the common bottom tank 14 is fixedly connected to a control wheel 18, and a locking piece 19 is also fixedly connected to the common bottom tank 14. The locking piece 19 is provided with a through hole, and the median rotating shaft 17 also passes through the through hole of the locking piece 19. The locking piece 19 is also provided with a locking screw blind hole, which is perpendicular to and connected to the through hole of the locking piece 19, and a locking pin 20 is threadedly connected in the locking screw blind hole.

Claims

1. A slurry impurity removal mixer for flotation process, characterized in that: The invention comprises a stirring tank (1), wherein a feeding pipe (6) is connected to a side of the outer cylindrical surface of the stirring tank (1) near the top, and the other end of the feeding pipe (6) is connected to a filtering device (5); a discharge pipe (7) is connected to a side of the outer cylindrical surface of the stirring tank (1) near the bottom, and a flow meter is arranged on the discharge pipe (7); a stirring mechanism is arranged inside the stirring tank (1), and the stirring mechanism is connected to a driving unit (4); and the driving unit (4) is connected to the top of the stirring tank (1); The filtering device (5) comprises a common bottom tank (14), the common bottom tank (14) is a hemispherical closed structure, a first feed cylinder (12) and a second feed cylinder (13) are connected through the circular plane of the common bottom tank (14), the first feed cylinder (12) and the second feed cylinder (13) are symmetrically distributed along the center of the circular plane of the common bottom tank (14), the first feed cylinder (12) and the second feed cylinder (13) are both cylindrical barrels, and the first feed cylinder ( 12) and the inner walls of the second feed barrel (13) are respectively connected with filter elements (15), a central rotation axis (17) is arranged near the bottom surface of the circular plane of the common bottom tank (14), two ends of the central rotation axis (17) are respectively rotatably connected to the spherical surface of the common bottom tank (14), one end of the central rotation axis (17) passes through the spherical surface of the common bottom tank (14), and the central rotation axis (17) is arranged on the symmetrical plane of the first feed barrel (12) and the second feed barrel (13).

2. The slurry impurity removal mixer for flotation process according to claim 1, characterized in that: The stirring mechanism comprises a stirring shaft (2), the stirring shaft (2) being rotatably connected to the center of the top of the stirring tank (1) via a bearing, one end of the stirring shaft (2) being fixedly connected to a stirring impeller (3), the stirring impeller (3) being located inside the stirring tank (1), and further comprising a plurality of ridges (11), the ridges (11) being in the shape of long sheets, one side of the ridges (11) being a plane, and the other side of the ridges (11) being a wavy curved surface, one side of the plane of the ridges (11) being fixedly connected to the inner wall of the stirring tank (1), the length direction of the ridges (11) being parallel to the axis of the stirring tank (1), and the plurality of ridges (11) being staggeredly distributed at different heights on the inner wall of the cavity of the stirring tank (1).

3. The pulp impurity removal mixer for flotation process according to claim 2, characterized in that: The driving unit (4) comprises a driving motor (8), the base of the driving motor (8) being fixedly connected to the top of the stirring tank (1) by bolts, a belt pulley being provided on the rotating shaft of the driving motor (8), and the driving unit (4) further comprises a driving wheel (10), the rotating shaft of the driving wheel (10) being fixedly connected to one end of the stirring shaft (2), and a driving belt (9) being connected between the driving wheel (10) and the rotating shaft of the driving motor (8).

4. The pulp impurity removal mixer for flotation process according to claim 3, characterized in that: One end of the middle rotating shaft (17) passing through the common bottom tank (14) is fixedly connected to a control wheel (18), and the common bottom tank (14) is also fixedly connected to a locking member (19), and the locking member (19) is provided with a through hole. The middle rotating shaft (17) also passes through the through hole of the locking member (19), and the locking member (19) is also provided with a locking screw blind hole, and the locking screw blind hole is perpendicular to and communicates with the through hole of the locking member (19), and a locking pin (20) is threadedly connected in the locking screw blind hole.

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