Liquefied gas residual liquid treatment and recovery device

Abstract

The invention relates to the technical field of liquefied gas processing, and discloses a liquefied gas residual liquid treatment and recovery device which comprises a feeding component, and the feeding component is provided with a base plate; the liquid discharging component is detachably arranged in the feeding component, and the liquid discharging component is provided with a gas cylinder; the transferring component is detachably arranged on one side face of the feeding component, the transferring component is provided with a base, a bottom plate is arranged at the upper end of the base, a conveying belt component is detachably arranged at the upper end of the base, and a belt is installed at the lower end of a first motor through the arranged transferring component; after a first motor rotates, a belt at the bottom is driven to rotate, an arc-shaped plate is arranged on the outer wall of the belt, residual liquid in a liquefied gas steel cylinder is extracted and then placed at the upper end of a bottom plate, and then the liquefied gas steel cylinder is clamped by conveying belt components arranged on the two sides to move forwards, so that the residual liquid of the liquefied gas is treated and recycled; and the liquefied gas steel cylinder is convenient to transfer.

Description

Technical Field

[0001] The present invention relates to the technical field of liquefied gas processing, and in particular to a liquefied gas residual liquid processing and recovery device. Background Art

[0002] The main components of liquefied petroleum gas are propane, propylene, butane, butene (C3 and C4), which account for more than 95%, and ethane and ethylene (C2), which account for 2%, as well as a small amount of pentane, pentene (C5) and hydrocarbons heavier than pentane. At normal temperature and pressure, C2, C3 and C4 are all gases, and they are burned as soon as they come out of the cylinder. Since the boiling point of the C5 component is relatively high (27.85~36.9℃), it is not easy to vaporize at normal temperature and pressure, and it is still a liquid, so it is called residual liquid. The residual liquid, sulfide and water are retained in the container together, and accumulate with the increase of the number of fillings. If it is discharged into the atmosphere, the residual liquid will volatilize, which is easier to spread and burn than gasoline, and will form a fire once it encounters a fire. Therefore, relevant safety and technical regulations require that the residual liquid must be recovered in a closed manner, and it is forbidden to discharge it into rivers, ditches and sewers at will.

[0003] After searching, the applicant found that a Chinese patent disclosed "a gas delivery device for a liquefied gas cylinder", and its publication (announcement) number is "202011358473.0". This patent is mainly arranged at the bottle mouth of the liquefied gas cylinder, including an angle valve detachably connected to the bottle mouth, and a gas delivery pipe is arranged in the liquefied gas cylinder, one end of the gas delivery pipe is connected to the angle valve, and the other end is located in the liquefied gas cylinder, and an atomizing pipe fitting for atomizing the residual liquid is arranged on the gas delivery pipe, and the atomizing pipe fitting includes a mixing tube, an air inlet pipe and a liquid inlet pipe connected to the mixing tube, one end of the mixing tube is connected to the air delivery pipe, and the other end is connected to the air inlet pipe. When the liquefied gas residual liquid in the liquefied gas cylinder is processed and recovered, the liquefied gas cylinder is relatively heavy and difficult to transport. For this reason, we propose a liquefied gas residual liquid processing and recovery device. Summary of the invention

[0004] The object of the present invention is to provide a liquefied gas residual liquid processing and recovery device to solve the problem that the liquefied gas cylinder is heavy and difficult to transport when processing and recovering the liquefied gas residual liquid in the liquefied gas cylinder proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquefied gas residual liquid processing and recovery device, comprising a feeding component, the feeding component is provided with a base plate, a groove is arranged at the middle position of the upper end surface of the base plate, a support rod is arranged at the upper end of the base plate, a baffle is arranged on one side of the support rod, and a first hydraulic cylinder is detachably arranged at the lower end of the baffle; The liquid discharge component is detachably arranged inside the feeding component, and the liquid discharge component is provided with a gas cylinder; The transfer member is detachably arranged on a side of the feeding member, the transfer member is provided with a base, a bottom plate is provided on the upper end of the base, and a conveyor belt member is detachably arranged on the upper end of the base; The disassembly component is arranged on one side of the transfer component, and a base is arranged at the bottom of the disassembly component.

[0006] As a further solution of the present invention: the output end of the first hydraulic cylinder passes through the baffle, a push plate is arranged at the output end of the first hydraulic cylinder, and a first bracket is fixedly connected to the bottom of the base plate.

[0007] As a further solution of the present invention: a second bracket is fixedly connected to one side of the gas cylinder, a side of the second bracket is in contact with the baffle, and a vacuum pump is arranged on the other side of the gas cylinder.

[0008] As a further solution of the present invention: a connecting pipe is arranged at one end of the gas cylinder, a control valve is arranged at one end of the connecting pipe, a liquid extraction gun is arranged at the lower end of the control valve, and a check valve is arranged in the middle of the liquid extraction gun.

[0009] As a further solution of the present invention: a supporting foot piece is arranged at the lower end of the base, and the number of the supporting foot pieces is four and they are symmetrically arranged at the bottom of the base.

[0010] As a further solution of the present invention: the conveyor belt component is provided with a first motor, a belt is arranged at the lower end of the first motor, and an arc plate is provided on the outer wall of the belt.

[0011] As a further solution of the present invention: a first axle seat is arranged at the lower end of the belt, a second axle seat is arranged at one end of the belt, a connecting rod is arranged on one side of the second axle seat, and a connecting rod bolt is detachably arranged at the bottom of the connecting rod.

[0012] As a further solution of the present invention: a mechanical arm is rotatably connected to the upper end of the base, a second motor is arranged at one end of the mechanical arm, and a sleeve is arranged at the lower end of the second motor.

[0013] Technical effects and advantages of the present invention: 1. Through the transfer components, the belt is installed at the lower end of the first motor, and the two sets of conveyor belt components are symmetrically installed on the upper end of the base, and the bottom plate is installed in the middle position of the upper end of the base. After the first motor rotates, the bottom belt is driven to rotate, and the arc plate is arranged on the outer wall of the belt. After the residual liquid in the liquefied gas cylinder is extracted, it is placed on the upper end of the bottom plate, so that the conveyor belt components arranged on both sides clamp the liquefied gas cylinder and move it forward, so that after the residual liquid of the liquefied gas is processed and recovered, the transportation of the liquefied gas cylinder is more convenient.

[0014] 2. Through the provided feeding component, the first hydraulic cylinder is installed at the bottom of the baffle, and the liquefied gas cylinder is placed in the groove at the upper end of the base plate, so that the liquefied gas cylinder is placed stably during processing. After the liquefied gas residual liquid is processed and recovered, the push plate at the output end of the first hydraulic cylinder pushes the liquefied gas cylinder into the provided transfer component, thereby making it more convenient to transfer the liquefied gas cylinder.

[0015] 3. By setting up the disassembly component, the disassembly component is arranged on one side of the transfer component, and the sleeve is installed at the bottom of the second motor. When the liquefied gas cylinder is transferred on the transfer component, the sleeve at the bottom of the second motor can be used to easily disassemble the angle valve on the upper end of the liquefied gas cylinder through the set disassembly component, without manual disassembly, saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 It is a structural schematic diagram of the feeding component of the present invention; Figure 4 It is a structural schematic diagram of the liquid discharge component of the present invention; Figure 5 It is a schematic structural diagram of the transfer component of the present invention; Figure 6 It is a structural schematic diagram of a conveyor belt component of the present invention; Figure 7 It is a structural schematic diagram of the disassembly component of the present invention.

[0017] In the figure: 1. feeding component; 11. base plate; 12. groove; 13. support rod; 14. baffle; 15. first hydraulic cylinder; 16. push plate; 17. first bracket; 2. discharge component; 21. gas cylinder; 22. second bracket; 23. vacuum pump; 24. connecting pipe; 25. control valve; 26. check valve; 27. liquid extraction gun; 3. transfer component; 31. base; 32. bottom plate; 33. supporting foot piece; 34. conveyor belt component; 341. first motor; 342. belt; 343. arc plate; 344. first shaft seat; 345. second shaft seat; 346. connecting rod; 347. connecting rod bolt; 4. disassembly component; 41. base; 42. mechanical arm; 43. second motor; 44. sleeve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0019] Please refer to the attached Figure 1 - Attachment Figure 2 A liquefied gas residual liquid processing and recovery device comprises a feeding component 1, the feeding component 1 is provided with a base plate 11, a groove 12 is arranged at the middle position of the upper end surface of the base plate 11, a support rod 13 is arranged at the upper end of the base plate 11, a baffle 14 is arranged on one side of the support rod 13, and a first hydraulic cylinder 15 is detachably arranged at the lower end of the baffle 14; The liquid discharge component 2 is detachably arranged inside the feeding component 1, and the liquid discharge component 2 is provided with a gas cylinder 21; The transfer member 3 is detachably arranged on one side of the feeding member 1, and the transfer member 3 is provided with a base 31, a bottom plate 32 is arranged on the upper end of the base 31, and a conveyor belt member 34 is detachably arranged on the upper end of the base 31; The disassembly component 4 is arranged on one side of the transfer component 3 , and a base 41 is provided at the bottom of the disassembly component 4 .

[0020] The discharge component 2 is installed inside the feeding component 1, the support rod 13 is fixed on the upper end of the base plate 11, and the baffle 14 is installed on the side of the support rod 13, the first hydraulic cylinder 15 is installed at the bottom of the baffle 14, and the output end of the first hydraulic cylinder 15 passes through the baffle 14, the push plate 16 is installed at the output end of the first hydraulic cylinder 15, and one side of the discharge component 2 is installed on the inner wall of the baffle 14, so that the discharge component 2 is fixedly installed inside the feeding component 1, the transfer component 3 is installed on one side of the feeding component 1, the bottom plate 32 is fixedly installed on the upper end of the base 31, the belt 342 is installed on the lower end of the first motor 341, the first shaft seat 344 and the connecting rod 346 are installed on the upper end of the base 31, and the belt 342 is installed on the lower end of the first motor 341. The end is connected to the lower end of the second shaft seat 345, and the two sets of conveyor belt components 34 are symmetrically installed on the upper end of the base 31, and then the bottom plate 32 is installed in the middle position of the upper end of the base 31. After the first motor 341 rotates, the bottom belt 342 is driven to rotate, and the arc plate 343 is arranged on the outer wall of the belt 342. Then, the residual liquid in the liquefied gas cylinder is extracted and placed on the upper end of the bottom plate 32, so that the conveyor belt components 34 arranged on both sides clamp the liquefied gas cylinder and move it forward, so that the liquefied gas cylinder can be transported after the residual liquid of the liquefied gas is processed and recovered, and the disassembly component 4 is arranged on one side of the transport component 3, and the sleeve 44 at the bottom of the second motor 43 can easily disassemble the angle valve at the upper end of the liquefied gas cylinder.

[0021] Specifically, through the set transfer component 3, the belt 342 is first installed on the lower end of the first motor 341, and the two sets of conveyor belt components 34 are symmetrically installed on the upper end of the base 31, and then the bottom plate 32 is installed in the middle position of the upper end of the base 31. After the first motor 341 rotates, the bottom belt 342 is driven to rotate, and the arc plate 343 is arranged on the outer wall of the belt 342. Subsequently, the residual liquid in the liquefied gas cylinder is extracted and placed on the upper end of the bottom plate 32, so that the conveyor belt components 34 set on both sides clamp the liquefied gas cylinder and move it forward, so that after the residual liquid of the liquefied gas is processed and recovered, the transportation of the liquefied gas cylinder is more convenient. Embodiment 2

[0022] Please refer to the attached Figure 1 - Attachment Figure 5 On the basis of the first embodiment, it is further obtained that the output end of the first hydraulic cylinder 15 passes through the baffle 14, a push plate 16 is arranged at the output end of the first hydraulic cylinder 15, and a first bracket 17 is fixedly connected to the bottom of the base plate 11.

[0023] A second bracket 22 is fixedly connected to one side of the gas cylinder 21 , one side of the second bracket 22 is in contact with the baffle 14 , and a vacuum pump 23 is disposed on the other side of the gas cylinder 21 .

[0024] A connecting pipe 24 is disposed at one end of the gas cylinder 21 , a control valve 25 is disposed at one end of the connecting pipe 24 , a liquid extraction gun 27 is disposed at the lower end of the control valve 25 , and a check valve 26 is disposed at the middle of the liquid extraction gun 27 .

[0025] A supporting leg 33 is disposed at the lower end of the base 31 . There are four supporting leg 33 , which are symmetrically disposed at the bottom of the base 31 .

[0026] The conveyor belt component 34 is provided with a first motor 341 . A belt 342 is arranged at the lower end of the first motor 341 . An arc plate 343 is arranged on the outer wall of the belt 342 .

[0027] A first shaft seat 344 is provided at the lower end of the belt 342 , a second shaft seat 345 is provided at one end of the belt 342 , a connecting rod 346 is arranged on one side of the second shaft seat 345 , and a connecting rod bolt 347 is detachably arranged at the bottom of the connecting rod 346 .

[0028] A mechanical arm 42 is rotatably connected to the upper end of the base 41 . A second motor 43 is disposed at one end of the mechanical arm 42 . A sleeve 44 is disposed at the lower end of the second motor 43 .

[0029] The second bracket 22 is fixedly installed on one side of the gas cylinder 21, and the connecting pipe 24 is installed at one end of the gas cylinder 21, and the other end of the connecting pipe 24 is connected to the upper end of the liquid extraction gun 27, and the liquid extraction gun 27 is connected to the liquefied gas cylinder, and the angle valve on the liquefied gas cylinder is opened, and then the check valve 26 and the control valve 25 provided in the discharge component 2 are opened, and the residual liquid inside the liquefied gas cylinder is recovered to the inside of the gas cylinder 21 provided with the discharge component 2 through the provided vacuum pump 23, thereby completing the treatment and recovery of the liquefied gas residual liquid, and the disassembly component 4 is arranged on one side of the transfer component 3, and the mechanical arm 42 is installed on the upper end of the base 41, and the second motor 43 is installed at one end of the mechanical arm 42, and then the sleeve 44 is installed at the bottom of the second motor 43. When the liquefied gas cylinder is transported on the transfer component 3, the sleeve 44 at the bottom of the second motor 43 can conveniently disassemble the angle valve at the upper end of the liquefied gas cylinder through the provided disassembly component 4.

[0030] Specifically, a loading component 1 is set up, and then the first hydraulic cylinder 15 is installed at the bottom of the baffle 14, and the liquefied gas cylinder is placed in the groove 12 at the upper end of the base plate 11, so that the liquefied gas cylinder is placed stably during processing. After the liquefied gas residual liquid is processed and recovered, the push plate 16 at the output end of the first hydraulic cylinder 15 pushes the liquefied gas cylinder into the set transfer component 3, thereby making it more convenient to transfer the liquefied gas cylinder. Embodiment 3

[0031] Please refer to the attached Figure 1 - Attachment Figure 7 On the basis of the second embodiment, it is further obtained that the output end of the first hydraulic cylinder 15 passes through the baffle 14, a push plate 16 is arranged at the output end of the first hydraulic cylinder 15, and a first bracket 17 is fixedly connected to the bottom of the base plate 11.

[0032] A second bracket 22 is fixedly connected to one side of the gas cylinder 21 , one side of the second bracket 22 is in contact with the baffle 14 , and a vacuum pump 23 is disposed on the other side of the gas cylinder 21 .

[0033] A connecting pipe 24 is disposed at one end of the gas cylinder 21 , a control valve 25 is disposed at one end of the connecting pipe 24 , a liquid extraction gun 27 is disposed at the lower end of the control valve 25 , and a check valve 26 is disposed at the middle of the liquid extraction gun 27 .

[0034] A supporting leg 33 is disposed at the lower end of the base 31 . There are four supporting leg 33 , which are symmetrically disposed at the bottom of the base 31 .

[0035] The conveyor belt component 34 is provided with a first motor 341 . A belt 342 is arranged at the lower end of the first motor 341 . An arc plate 343 is arranged on the outer wall of the belt 342 .

[0036] A first shaft seat 344 is provided at the lower end of the belt 342 , a second shaft seat 345 is provided at one end of the belt 342 , a connecting rod 346 is arranged on one side of the second shaft seat 345 , and a connecting rod bolt 347 is detachably arranged at the bottom of the connecting rod 346 .

[0037] A mechanical arm 42 is rotatably connected to the upper end of the base 41 . A second motor 43 is disposed at one end of the mechanical arm 42 . A sleeve 44 is disposed at the lower end of the second motor 43 .

[0038] The second bracket 22 is fixedly installed on one side of the gas cylinder 21, and the connecting pipe 24 is installed at one end of the gas cylinder 21, and the other end of the connecting pipe 24 is connected to the upper end of the liquid extraction gun 27, and the liquid extraction gun 27 is connected to the liquefied gas cylinder, and the angle valve on the liquefied gas cylinder is opened, and then the check valve 26 and the control valve 25 provided in the discharge component 2 are opened, and the residual liquid inside the liquefied gas cylinder is recovered to the inside of the gas cylinder 21 provided with the discharge component 2 through the provided vacuum pump 23, thereby completing the treatment and recovery of the liquefied gas residual liquid, and the disassembly component 4 is arranged on one side of the transfer component 3, and the mechanical arm 42 is installed on the upper end of the base 41, and the second motor 43 is installed at one end of the mechanical arm 42, and then the sleeve 44 is installed at the bottom of the second motor 43. When the liquefied gas cylinder is transported on the transfer component 3, the sleeve 44 at the bottom of the second motor 43 can conveniently disassemble the angle valve at the upper end of the liquefied gas cylinder through the provided disassembly component 4.

[0039] Specifically, by setting up the disassembly component 4, the disassembly component 4 is arranged on one side of the transfer component 3, and then the sleeve 44 is installed at the bottom of the second motor 43. When the liquefied gas cylinder is transferred on the transfer component 3, the sleeve 44 at the bottom of the second motor 43 can be used to easily disassemble the angle valve at the upper end of the liquefied gas cylinder through the set disassembly component 4, without manual disassembly, saving labor costs.

[0040] Working principle of the present invention: The present invention is a liquefied gas residual liquid processing and recovery device, wherein the discharge component 2 is installed inside the feeding component 1, the support rod 13 is fixed to the upper end of the base plate 11, and the baffle 14 is installed on the side of the support rod 13, the first hydraulic cylinder 15 is installed at the bottom of the baffle 14, and the output end of the first hydraulic cylinder 15 passes through the baffle 14, the push plate 16 is installed at the output end of the first hydraulic cylinder 15, and one side of the discharge component 2 is installed on the inner wall of the baffle 14, so that the discharge component 2 is fixedly installed inside the feeding component 1, the transfer component 3 is installed on one side of the feeding component 1, and the bottom plate 32 is fixed The first motor 341 is installed at the upper end of the base 31, the belt 342 is installed at the lower end of the first motor 341, the first shaft seat 344 and the connecting rod 346 are installed at the upper end of the base 31, and one end of the belt 342 is connected to the lower end of the second shaft seat 345, and the two sets of conveyor belt components 34 are symmetrically installed on the upper end of the base 31, and then the bottom plate 32 is installed in the middle position of the upper end of the base 31, and the bottom belt 342 is driven to rotate after the first motor 341 rotates, and the arc plate 343 is arranged on the outer wall of the belt 342, and then the residual liquid in the liquefied gas cylinder is extracted and placed on the upper end of the bottom plate 32, so that the conveyor components set on both sides are The belt component 34 clamps the liquefied gas cylinder and moves it forward, so that the liquefied gas cylinder can be transported after the residual liquid of the liquefied gas is processed and recovered, and the disassembly component 4 is set on one side of the transport component 3. The sleeve 44 at the bottom of the second motor 43 can easily disassemble the angle valve on the upper end of the liquefied gas cylinder, and the second bracket 22 is fixedly installed on one side of the gas cylinder 21, and the connecting pipe 24 is installed at one end of the gas cylinder 21, and the other end of the connecting pipe 24 is connected to the upper end of the liquid extraction gun 27, and the liquid extraction gun 27 is connected to the liquefied gas cylinder, and the angle valve on the liquefied gas cylinder is opened, and then the check valve 26 and the control valve provided on the discharge component 2 are opened. The valve 25, through the vacuum pump 23, recovers the residual liquid in the liquefied gas cylinder to the inside of the gas cylinder 21 set in the discharge component 2 through the liquid extraction gun 27, thereby completing the treatment and recovery of the residual liquid of the liquefied gas. The disassembly component 4 is arranged on one side of the transfer component 3, the mechanical arm 42 is installed on the upper end of the base 41, and the second motor 43 is installed at one end of the mechanical arm 42, and then the sleeve 44 is installed at the bottom of the second motor 43. When the liquefied gas cylinder is transported on the transfer component 3, the sleeve 44 at the bottom of the second motor 43 can be used to easily disassemble the angle valve at the upper end of the liquefied gas cylinder through the disassembly component 4.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquefied gas residual liquid processing and recovery device, comprising a feeding component (1), characterized in that: The feeding component (1) is provided with a base plate (11), a groove (12) is arranged at the middle position of the upper end surface of the base plate (11), a support rod (13) is arranged at the upper end of the base plate (11), a baffle (14) is arranged on one side of the support rod (13), and a first hydraulic cylinder (15) is detachably arranged at the lower end of the baffle (14); The liquid discharge component (2) is detachably arranged inside the feeding component (1), and the liquid discharge component (2) is provided with a gas cylinder (21); The transfer component (3) is detachably arranged on a side surface of the loading component (1), the transfer component (3) is provided with a base (31), a bottom plate (32) is arranged at the upper end of the base (31), and a conveyor belt component (34) is detachably arranged at the upper end of the base (31); The disassembly component (4) is arranged on one side of the transfer component (3), and a base (41) is provided at the bottom of the disassembly component (4).

2. A liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: The output end of the first hydraulic cylinder (15) passes through the baffle (14), a push plate (16) is arranged at the output end of the first hydraulic cylinder (15), and a first bracket (17) is fixedly connected to the bottom of the base plate (11).

3. A liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: A second bracket (22) is fixedly connected to one side of the gas cylinder (21), one side of the second bracket (22) is in contact with the baffle (14), and a vacuum pump (23) is provided on the other side of the gas cylinder (21).

4. A liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: A connecting pipe (24) is disposed at one end of the gas cylinder (21), a control valve (25) is disposed at one end of the connecting pipe (24), a liquid extraction gun (27) is disposed at the lower end of the control valve (25), and a check valve (26) is disposed at the middle of the liquid extraction gun (27).

5. The liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: A supporting foot piece (33) is arranged at the lower end of the base (31), and the supporting foot pieces (33) are four in number and are symmetrically arranged at the bottom of the base (31).

6. The liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: The conveyor belt component (34) is provided with a first motor (341), a belt (342) is arranged at the lower end of the first motor (341), and an arc-shaped plate (343) is provided on the outer wall of the belt (342).

7. A liquefied gas residual liquid treatment and recovery device according to claim 6, characterized in that: A first shaft seat (344) is provided at the lower end of the belt (342), a second shaft seat (345) is provided at one end of the belt (342), a connecting rod (346) is arranged on one side of the second shaft seat (345), and a connecting rod bolt (347) is detachably arranged at the bottom of the connecting rod (346).

8. The liquefied gas residual liquid treatment and recovery device according to claim 1, characterized in that: The upper end of the base (41) is rotatably connected to a mechanical arm (42), one end of the mechanical arm (42) is provided with a second motor (43), and the lower end of the second motor (43) is provided with a sleeve (44).

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