Discharging device of centrifugal machine

Abstract

The utility model discloses a discharging device of a centrifugal machine, and relates to the technical field of discharging devices, in particular to the discharging device of the centrifugal machine, which comprises a collecting barrel, a shell, a filter cartridge, a rotating cone, a rotating component, a lifting component and a material cleaning component, the rotating cone is positioned at the inner bottom of the filter cartridge, and the peripheral edge of the rotating cone is propped against the inner side wall of the filter cartridge; by arranging the material cleaning part, the rotating cone and the inner wall of the filter cylinder are synchronously cleaned in a gas injection mode, and material residues can be effectively avoided. Meanwhile, gas in the gas collecting cylinder enters the annular pipe through the connecting pipe and is sprayed out from the spray head to clean the inner wall of the filter cylinder and accelerate drying. In the process, the cleaning efficiency of the equipment is improved, the risks of equipment damage and production pollution caused by material residues are reduced, the service life of the equipment is remarkably prolonged, and the production efficiency of the equipment is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of unloading devices, specifically a centrifuge unloading device. Background Technology

[0002] Centrifuges are a common separation device used in industries such as chemical and pharmaceutical manufacturing, widely applied in the separation of solids and liquids. However, existing centrifuge unloading devices have several problems in practical use. A published Chinese patent application, CN220969502U, proposes a centrifuge unloading device. This device, with its structure including a rotating cone, filter cartridge, collection tank, rotating assembly, and lifting assembly, addresses to some extent the issues of liquid spillage from the outlet and personnel contact with the material. However, it still has some shortcomings in practical applications.

[0003] First, the cleaning components of this device fail to thoroughly clean the rotating cone and the inner wall of the filter cartridge, easily leading to material residue. This not only affects the lifespan of the equipment but may also contaminate subsequent production processes. Second, the material drying effect during unloading is poor, often requiring additional drying time and reducing production efficiency. Furthermore, the overall structure of the device is complex, with numerous components, increasing both manufacturing costs and maintenance difficulty. Therefore, designing a centrifuge unloading device that effectively solves these problems has become a pressing technical challenge for those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a centrifuge unloading device that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrifuge unloading device, comprising a collection bucket, a shell, a filter cylinder, a rotating cone, a rotating component, a lifting component, and a cleaning component. The shell is fixedly installed on the collection bucket, and the filter cylinder is fixedly installed inside the shell. The rotating cone is located at the inner bottom of the filter cylinder, and the four peripheral edges of the rotating cone abut against the inner sidewall of the filter cylinder. Multiple through holes are provided on the sidewall of the filter cylinder. The lifting component includes a telescopic component and a support shell. The telescopic component is fixedly installed on the inner bottom wall of the collection bucket, and the support shell is fixedly installed... The rotating cone is rotatably mounted on the support shell at the output shaft end of the telescopic component; the rotating component includes a motor, which is fixedly installed inside the support shell and is connected to the rotating cone for transmission, driving the rotating cone to rotate; the cleaning component includes a ring pipe, a gas collecting cylinder, and multiple nozzles, the ring pipe is fixedly installed on the inner top wall of the shell and is located above the filter cartridge, the gas collecting cylinder is fixedly installed inside the collection bucket, the gas outlet end of the gas collecting cylinder is connected to the ring pipe, and each nozzle is fixedly installed on the ring pipe with its gas outlet end facing the inside of the filter cartridge.

[0006] Optionally, a feed inlet is provided on the top wall of the housing, a drainage cavity is formed between the housing and the filter cartridge, a drain pipe is fixedly installed on the side wall of the housing and the two are connected; a discharge port is provided on the lower side wall of the collection bucket.

[0007] Optionally, the telescopic component is fixedly installed on the gas collecting cylinder, and a material guiding baffle is fixedly installed on the inner bottom wall of the collecting barrel. The material guiding baffle is in the shape of a hollow frustum, and the gas collecting cylinder is located inside the material guiding baffle.

[0008] Optionally, the cleaning component further includes an air pump and a connecting pipe. The air pump is fixedly installed inside the collection bucket, with the gas inlet end of the air pump located outside the collection bucket and the gas outlet end of the air pump connected to the inside of the gas collecting cylinder. One end of the connecting pipe is fixedly installed to the gas collecting cylinder and the two are connected, while the other end of the connecting pipe is fixedly installed to the gas inlet end of the ring pipe and the two are connected.

[0009] Optionally, the rotating component further includes a first gear and a second gear, the second gear being fixedly mounted on the lower surface of the rotating cone, the first gear being fixedly mounted on the output shaft end of the motor, and the first gear meshing with the second gear.

[0010] Optionally, the cleaning component further includes a guide cone and a vertical pipe. The lower end of the vertical pipe is connected to the air collecting cylinder. The middle part of the vertical pipe passes through the support shell and the rotating cone in sequence, and the vertical pipe is slidably connected to the support shell and the rotating cone respectively. The upper end of the vertical pipe is fixedly connected to the guide cone. A gas channel is opened on the guide cone. The gas channel is connected to the inside of the vertical pipe. The gas outlet end of the gas channel faces the upper surface of the rotating cone.

[0011] Optionally, the cleaning component further includes a sliding rod and a piston. A sliding groove is provided on the side wall of the support shell. The sliding rod passes through the sliding groove laterally and is slidably connected to the support shell longitudinally through the sliding groove. A spring is fixedly connected to the support shell, and the end of the spring away from the support shell is fixedly connected to the sliding rod. One end of the sliding rod is fixedly connected to the vertical pipe. The piston is slidably installed inside the air collecting cylinder. The lower end of the vertical pipe passes through the piston and the two are fixedly connected. The vertical pipe communicates with the lower inner cavity of the air collecting cylinder.

[0012] (III) Beneficial Effects

[0013] This utility model provides a centrifuge unloading device, which has the following beneficial effects:

[0014] 1. This centrifuge unloading device, by incorporating a cleaning component, simultaneously cleans the rotating cone and the inner wall of the filter cartridge using gas jets, effectively preventing material residue. During the cleaning process, the airflow from the gas channel and nozzles not only blows off material adhering to the rotating cone and the inner wall of the filter cartridge but also accelerates the drying of the equipment's inner walls, shortening the interval between uses. Specifically, when the lifting component moves the rotating cone downwards, the guide cone in the cleaning component maintains a certain distance from the rotating cone, the gas channel opens, and compressed gas in the gas collecting cylinder is sprayed onto the inclined surface of the rotating cone through the vertical pipe and gas channel, blowing off the material. Simultaneously, the gas in the gas collecting cylinder enters the annular pipe through the connecting pipe and is sprayed out from the nozzle, cleaning the inner wall of the filter cartridge and accelerating drying. This process not only improves the cleaning efficiency of the equipment but also reduces the risk of equipment damage and production pollution caused by material residue, significantly extending the equipment's service life and production efficiency.

[0015] 2. This utility model adopts an integrated design of gear transmission and pneumatic mechanism, realizing the integration of dewatering, material unloading, and cleaning. Compared with the prior art, this device reduces the number of parts, lowering the manufacturing cost and maintenance difficulty. For example, the meshing transmission of the first and second gears in the rotating component enables the motor to efficiently drive the rotating cone to rotate, completing the centrifugal dewatering process of the material. Simultaneously, the coordinated work of the lifting and cleaning components achieves automatic material unloading and automatic cleaning of the equipment without manual intervention, further improving the automation level and production efficiency. Furthermore, the device has a compact overall structure and reasonable layout, saving installation space and improving stability and reliability, making it easier to apply in various production environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a centrifuge unloading device according to the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of a centrifuge unloading device according to the present invention;

[0019] Figure 3 This is a cross-sectional view of the collection box in a centrifuge unloading device according to the present invention.

[0020] Figure 4 This is a cross-sectional view of the rotating cone in a centrifuge unloading device according to the present invention.

[0021] Figure 5 This is a cross-sectional structural schematic diagram of the gas collecting cylinder in a centrifuge unloading device according to the present invention.

[0022] In the diagram: 1. Collection bucket; 2. Shell; 3. Inlet; 4. Outlet; 5. Guide baffle; 6. Gas collecting cylinder; 7. Telescopic component; 8. Support shell; 9. Motor; 10. First gear; 11. Second gear; 12. Rotating cone; 13. Nozzle; 14. Slide groove; 15. Slide rod; 16. Spring; 17. Vertical pipe; 18. Guide cone; 19. Gas passage; 20. Piston; 21. Filter cartridge; 22. Through hole; 23. Connecting pipe; 24. Drain pipe; 25. Ring pipe. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying anything.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0025] Example 1, please refer to Figures 1 to 5 This utility model provides a technical solution: a centrifuge unloading device, including a collection bucket 1, a shell 2, a filter cylinder 21, a rotating cone 12, a rotating component, a lifting component, and a cleaning component. The shell 2 is fixedly installed on the collection bucket 1, and the filter cylinder 21 is fixedly installed inside the shell 2. The rotating cone 12 is located at the inner bottom of the filter cylinder 21, and the four peripheral edges of the rotating cone 12 abut against the inner sidewall of the filter cylinder 21. Multiple through holes 22 are provided on the sidewall of the filter cylinder 21. A feed inlet 3 is provided on the top wall of the shell 2, which communicates with the interior of the filter cylinder 21. A drainage chamber is formed between the shell 2 and the filter cylinder 21. A drain pipe 24 is fixedly installed on the sidewall of the shell 2, and the two are connected. A discharge port 4 is provided at the bottom of the sidewall of the collection bucket 1.

[0026] The feed inlet 3 is used to feed materials, liquids (clean water), etc., into the filter cartridge 21. Various through holes 22 are used to discharge liquids from the filter cartridge 21; the diameter of the through holes 22 is smaller than the particle size of the material. The drain pipe 24 is used to discharge liquids from the shell 2. The collection bucket 1 is used to hold the materials.

[0027] The lifting component includes a telescopic component 7 and a support shell 8. The telescopic component 7 is fixedly installed on the inner bottom wall of the collection tank 1, and the support shell 8 is fixedly installed on the output shaft end of the telescopic component 7. The rotating cone 12 is rotatably installed on the support shell 8.

[0028] The telescopic component 7 functions by extending and retracting to move the support shell 8 up and down, thereby raising and lowering the rotating cone 12. When the telescopic component 7 extends, the support shell 8 moves upward, causing the rotating cone 12 to rise and fit tightly against the bottom of the filter cylinder 21, achieving a seal. When the telescopic component 7 retracts, the support shell 8 moves downward, causing the rotating cone 12 to descend, opening the bottom of the filter cylinder 21 and allowing material to be discharged. The telescopic component 7 can be a servo electric cylinder, an electric push rod, or similar device. The telescopic component 7 is waterproofed in actual implementation; details will not be elaborated here.

[0029] The rotating component includes a motor 9, which is fixedly installed inside the support housing 8. The motor 9 is connected to the rotating cone 12 and drives the rotating cone 12 to rotate. The rotating component also includes a first gear 10 and a second gear 11. The second gear 11 is fixedly installed on the lower surface of the rotating cone 12, and the first gear 10 is fixedly installed on the output shaft end of the motor 9, and the first gear 10 meshes with the second gear 11.

[0030] The function of motor 9 is to provide rotational power to the rotating cone 12. The output shaft of motor 9 drives the rotating cone 12 to rotate at high speed, thereby dehydrating the material under centrifugal force. When motor 9 starts, the output shaft drives the first gear 10 to rotate, which in turn drives the second gear 11 to rotate, thus rotating the rotating cone 12. The upper conical surface of the rotating cone 12 is engraved with concave and convex structures, which can move materials and liquids, effectively driving the material and liquid to rotate.

[0031] The cleaning component includes a ring pipe 25, an air collecting cylinder 6, and multiple nozzles 13. The ring pipe 25 is fixedly installed on the inner top wall of the housing 2 and is located above the filter cartridge 21. The air collecting cylinder 6 is fixedly installed inside the collection tank 1, and its gas outlet end is connected to the ring pipe 25. Each nozzle 13 is fixedly installed on the ring pipe 25, and its gas outlet end faces inward towards the filter cartridge 21. The cleaning component also includes an air pump and a connecting pipe 23. The air pump is fixedly installed inside the collection tank 1, with its gas inlet end located outside the collection tank 1 and its gas outlet end connected to the inside of the air collecting cylinder 6. One end of the connecting pipe 23 is fixedly installed and connected to the air collecting cylinder 6, and the other end of the connecting pipe 23 is fixedly installed and connected to the gas inlet end of the ring pipe 25.

[0032] The cleaning component is used to clean the inner walls of the rotating cone 12 and the filter cartridge 21 by gas injection after the material is discharged, preventing material residue. The specific working process is as follows: the air pump fills the air collecting cylinder 6 with gas, the gas in the air collecting cylinder 6 enters the ring pipe 25 through the connecting pipe 23, and is sprayed out from the nozzle 13. The airflow sprayed from the nozzle 13 directly acts on the inner wall of the filter cartridge 21, blowing off the material adhering to the inner wall.

[0033] Specifically, the telescopic component 7 is fixedly installed on the air collecting cylinder 6, and a guide baffle 5 is fixedly installed on the inner bottom wall of the collecting barrel 1. The guide baffle 5 is in the shape of a hollow frustum, and the air collecting cylinder 6 is located inside the guide baffle 5.

[0034] Among them, the guide baffle 5 serves to block the material, and the guide baffle 5 contains the air collecting cylinder 6 and other parts to prevent the material from interfering with the parts inside the guide baffle 5.

[0035] During use, in the feeding and dewatering stages: First, open the feed inlet 3 at the top of the housing 2 and pour the material into the filter cylinder 21. At this time, the bottom of the rotating cone 12 is tightly fitted with the bottom of the filter cylinder 21, forming a seal, and the material adheres to the inclined surface of the rotating cone 12. Start the motor 9, and the output shaft of the motor 9 drives the first gear 10 to rotate. The first gear 10 drives the second gear 11 to rotate through meshing, which in turn drives the rotating cone 12 to rotate. Under the action of centrifugal force, the water in the material is thrown out through the through hole 22 on the side wall of the filter cylinder 21, enters the drainage chamber between the housing 2 and the filter cylinder 21, and is discharged out of the equipment through the drain pipe 24, completing the material dewatering process.

[0036] Material discharge and cleaning stage: After the material is dewatered, the telescopic component 7 is activated. The telescopic component 7 retracts, causing the support shell 8 to move downwards, which in turn causes the rotating cone 12 to descend. When the rotating cone 12 descends to a certain position, the bottom of the filter cylinder 21 opens, and the material slides down the inclined surface of the rotating cone 12 under the action of gravity, eventually falling into the collection bucket 1. At the same time, the cleaning component starts working. The air pump injects air into the air collecting cylinder 6. The gas in the air collecting cylinder 6 enters the ring pipe 25 through the connecting pipe 23 and is sprayed out from the nozzle 13. The airflow sprayed from the nozzle 13 directly acts on the inner wall of the filter cylinder 21, blowing off the material adhering to the inner wall. This process not only realizes the automatic discharge of materials, but also automatically cleans the equipment through gas injection, reducing the workload of manual cleaning and improving the cleaning efficiency of the equipment.

[0037] Reset phase: After the material is discharged and the cleaning is completed, the telescopic component 7 extends, which drives the support shell 8 to move upward, thereby driving the rotating cone 12 to rise and re-fit with the bottom of the filter cylinder 21. The equipment returns to its initial state and is ready for the next material processing.

[0038] Example 2, please refer to Figures 1 to 5 The main difference between this embodiment and Embodiment 1 is that the cleaning component also includes a guide cone 18 and a vertical pipe 17. The lower end of the vertical pipe 17 is connected to the gas collecting cylinder 6, and the middle part of the vertical pipe 17 passes through the support shell 8 and the rotating cone 12 in sequence. The vertical pipe 17 is slidably connected to the support shell 8 and the rotating cone 12 respectively. The upper end of the vertical pipe 17 is fixedly connected to the guide cone 18. A gas channel 19 is provided on the guide cone 18. The gas channel 19 is connected to the inside of the vertical pipe 17, and the gas outlet end of the gas channel 19 faces the upper surface of the rotating cone 12.

[0039] In this process, an air pump injects air into the air collecting cylinder 6. The gas in the collecting cylinder 6 enters the gas channel 19 through the vertical pipe 17 and is then ejected through the gas channel 19. The gas ejected from the gas channel 19 blows across the inclined surface of the rotating cone 12, ensuring that the material is thoroughly removed. This process not only achieves automatic material discharge but also automatically cleans the equipment through gas injection, reducing the workload of manual cleaning and improving the cleaning efficiency of the equipment.

[0040] In this embodiment, the structure of the cleaning component has been further optimized. A guide cone 18 and a vertical pipe 17 have been added. This improvement makes the direction of gas injection more precise, enabling more effective purging of the inclined surface of the rotating cone 12, further improving the cleaning effect. The specific working process is as follows: When the rotating cone 12 descends, the vertical pipe 17 remains relatively stationary due to the relative movement of the support shell 8 and the rotating cone 12. The gas channel 19 opens, and the gas in the gas collecting cylinder 6 enters the gas channel 19 through the vertical pipe 17 and is ejected from the outlet end of the gas channel 19, directly acting on the inclined surface of the rotating cone 12 to blow off the material adhering to the inclined surface. At the same time, the nozzle 13 on the ring pipe 25 continues to spray gas to purge the inner wall of the filter cartridge 21, ensuring the cleanliness of the inside of the equipment.

[0041] Specifically, the cleaning component also includes a slide rod 15 and a piston 20. A groove 14 is provided on the side wall of the support shell 8. The slide rod 15 passes laterally through the groove 14 and is longitudinally slidably connected to the support shell 8 via the groove 14. A spring 16 is fixedly connected to the support shell 8, with one end of the spring 16 away from the support shell 8 fixedly connected to the slide rod 15. One end of the slide rod 15 is fixedly connected to the vertical pipe 17. The piston 20 is slidably installed inside the air collecting cylinder 6. The lower end of the vertical pipe 17 passes through the piston 20, and the two are fixedly connected. The vertical pipe 17 communicates with the lower inner cavity of the air collecting cylinder 6.

[0042] The sliding rod 15 and spring 16 provide stable support for the vertical pipe 17. During the lifting and lowering of the rotating cone 12, the elasticity of the spring 16 ensures smoother relative movement between the vertical pipe 17 and the support shell 8. The piston 20 compresses and distributes the gas in the gas collecting cylinder 6. When the telescopic member 7 moves the support shell 8 downward, the piston 20 moves downward within the gas collecting cylinder 6, compressing the gas inside and causing it to be ejected through the vertical pipe 17 and the gas passage 19, thus completing the cleaning action.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A centrifuge unloading device, characterized in that: Includes a collection bucket (1), a shell (2), a filter cartridge (21), a rotating cone (12), rotating components, lifting components, and cleaning components. The housing (2) is fixedly installed on the collection bucket (1), the filter cylinder (21) is fixedly installed inside the housing (2), the rotating cone (12) is located at the bottom of the filter cylinder (21), and the four peripheral edges of the rotating cone (12) abut against the inner sidewall of the filter cylinder (21); a plurality of through holes (22) are provided on the sidewall of the filter cylinder (21); The lifting component includes a telescopic component (7) and a support shell (8). The telescopic component (7) is fixedly installed on the inner bottom wall of the collection bucket (1). The support shell (8) is fixedly installed on the output shaft end of the telescopic component (7). The rotating cone (12) is rotatably installed on the support shell (8). The rotating component includes a motor (9), which is fixedly installed inside the support shell (8). The motor (9) is connected to the rotating cone (12) in a transmission manner, and the motor (9) drives the rotating cone (12) to rotate. The cleaning component includes a ring pipe (25), a gas collecting cylinder (6), and multiple nozzles (13). The ring pipe (25) is fixedly installed on the inner top wall of the housing (2) and is located above the filter cartridge (21). The gas collecting cylinder (6) is fixedly installed inside the collection bucket (1). The gas outlet of the gas collecting cylinder (6) is connected to the ring pipe (25). Each nozzle (13) is fixedly installed on the ring pipe (25) and the gas outlet of the nozzle (13) faces the inside of the filter cartridge (21).

2. The centrifuge unloading device according to claim 1, characterized in that: The top wall of the housing (2) is provided with a feed inlet (3), and the housing (2) and the filter cylinder (21) form a drainage cavity. A drain pipe (24) is fixedly installed on the side wall of the housing (2) and the two are connected. A discharge port (4) is provided below the side wall of the collection bucket (1).

3. A centrifuge unloading device according to claim 1, characterized in that: The telescopic component (7) is fixedly installed on the gas collecting cylinder (6), and a material guiding baffle (5) is fixedly installed on the inner bottom wall of the collecting barrel (1). The material guiding baffle (5) is a hollow frustum shape, and the gas collecting cylinder (6) is located inside the material guiding baffle (5).

4. A centrifuge unloading device according to claim 1, characterized in that: The cleaning component also includes an air pump and a connecting pipe (23). The air pump is fixedly installed inside the collection bucket (1). The gas inlet end of the air pump is located outside the collection bucket (1), and the gas outlet end of the air pump is connected to the inside of the gas collecting cylinder (6). One end of the connecting pipe (23) is fixedly installed to the gas collecting cylinder (6) and the two are connected. The other end of the connecting pipe (23) is fixedly installed to the gas inlet end of the ring pipe (25) and the two are connected.

5. A centrifuge unloading device according to claim 1, characterized in that: The rotating component also includes a first gear (10) and a second gear (11). The second gear (11) is fixedly mounted on the lower surface of the rotating cone (12), and the first gear (10) is fixedly mounted on the output shaft end of the motor (9). The first gear (10) meshes with the second gear (11).

6. A centrifuge unloading device according to claim 4, characterized in that: The cleaning component also includes a guide cone (18) and a vertical pipe (17). The lower end of the vertical pipe (17) is connected to the gas collecting cylinder (6). The middle part of the vertical pipe (17) passes through the support shell (8) and the rotating cone (12) in sequence, and the vertical pipe (17) is slidably connected to the support shell (8) and the rotating cone (12) respectively. The upper end of the vertical pipe (17) is fixedly connected to the guide cone (18). A gas channel (19) is opened on the guide cone (18). The gas channel (19) is connected to the inside of the vertical pipe (17). The gas outlet end of the gas channel (19) faces the upper surface of the rotating cone (12).

7. A centrifuge unloading device according to claim 6, characterized in that: The cleaning component also includes a slide rod (15) and a piston (20). A sliding groove (14) is provided on the side wall of the support shell (8). The slide rod (15) passes through the sliding groove (14) laterally and is longitudinally slidably connected to the support shell (8) through the sliding groove (14). A spring (16) is fixedly connected to the support shell (8). The end of the spring (16) away from the support shell (8) is fixedly connected to the slide rod (15). One end of the slide rod (15) is fixedly connected to the vertical pipe (17). The piston (20) is slidably installed in the air collecting cylinder (6). The lower end of the vertical pipe (17) passes through the piston (20) and the two are fixedly connected. The vertical pipe (17) communicates with the lower inner cavity of the air collecting cylinder (6).

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