A method of using a filling machine

Abstract

The present invention relates to a method of using a filling machine, which includes a material guiding mechanism. The material guiding mechanism includes a cylinder body and a piston assembly. The interior of the cylinder body is a cavity, and one end of the cylinder body is provided with a material inlet and outlet. The piston assembly includes a piston pressing plate disposed inside the cylinder body and a piston shaft connected to the piston pressing plate. The piston shaft is configured to be able to drive the piston pressing plate to reciprocate along the length direction of the cylinder body. The piston assembly further includes an airbag assembly. The airbag assembly includes an airbag sealing ring sleeved around the periphery of the piston pressing plate. The airbag sealing ring is in sealed connection with the inner wall of the cylinder body in the inflated state and in clearance connection with the inner wall of the cylinder body in the negative pressure state. The filling method provided by the present invention adopts a specially designed airbag type sealing structure, which can enable the piston assembly to switch between the sealed connection state and the clearance connection state with the cylinder wall. In the clearance connection state, the piston assembly and the cylinder wall can be thoroughly cleaned without disassembling the equipment, and the operation is simple, and the cleanliness and maintainability are excellent.

Description

Technical Field

[0001] The present invention relates to the technical field of filling equipment, and specifically to a method for using a filling machine. Background Art

[0002] Currently, quantitative filling machines usually adopt a piston structure design in combination with a rotary valve design for quantitative filling of materials. However, this structure is usually not easy to clean and there are likely to be sanitation dead corners, such as the piston seal, as well as the rotary valve seal and gaps, which are not easy to clean thoroughly. If thorough cleaning and disinfection are required, the equipment needs to be disassembled. If disassembled repeatedly, it is not only easy to cause damage to the equipment components, but also requires high operating skills from employees, takes a long time, and wastes a large amount of manpower and material resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for using a filling machine, which can solve the technical problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A method for using a filling machine, including an airbag type material guiding mechanism. The airbag type material guiding mechanism includes a cylinder body and a piston assembly. The inside of the cylinder body is a cavity, and one end of the cylinder body is provided with a material inlet and outlet. The piston assembly includes a piston pressing plate arranged inside the cylinder body and a piston shaft connected to the piston pressing plate. The piston shaft is configured to be able to drive the piston pressing plate to reciprocate along the length direction of the cylinder body. The piston assembly further includes an airbag component. The airbag component includes an airbag seal ring sleeved around the periphery of the piston pressing plate. The airbag seal ring is in sealed connection with the inner wall of the cylinder body in the inflated state and in clearance connection with the inner wall of the cylinder body in the negative pressure state.

[0005] It also includes the following material guiding and cleaning methods:

[0006] The airbag seal ring in the airbag component can be switched between the inflated state and the negative pressure state. The inflated state of the airbag seal ring is the material guiding state. Pressurize the airbag seal ring to form a seal with the inner wall of the cylinder body to achieve material guiding. The negative pressure state of the airbag seal ring is the cleaning and disinfection state. In this state, apply negative pressure to the airbag seal ring to make it contract and form a gap with the inner wall of the cylinder body. Through this gap, clean the airbag seal ring and the inside of the cylinder body.

[0007] As a preferred solution, the airbag component further includes an air pipe connected to the airbag seal ring. The other end of the air pipe is arranged outside the cylinder body for connecting to a gas source device.

[0008] As a preferred solution, the air pipe is configured as a through channel arranged inside the piston shaft along the length direction of the piston shaft.

[0009] As a preferred solution, the cylinder body is further provided with a liquid discharge port on the side away from the material inlet and outlet.

[0010] As a preferred solution, the piston assembly further includes a piston guide ring connected to one side of the piston pressing plate, and the piston guide ring and the piston pressing plate cooperate to form a fixed position for the airbag sealing ring.

[0011] As a preferred solution, it further includes: a storage tank, a reversing valve group, and a filling part. The top of the storage tank is provided with a tank inlet and a CIP inlet, and the bottom is provided with a tank outlet. The reversing valve group is respectively connected to the tank outlet, the material inlet and outlet, and the filling part. The reversing valve group is configured to selectively connect the material inlet and outlet to the tank outlet or the filling part, and the filling part is used to fill the material into the packaging.

[0012] As a preferred solution, a liquid level gauge is further connected to the top of the storage tank, and the liquid level gauge is used to control the material feeding amount.

[0013] As a preferred solution, the reversing valve group includes an upper valve body, a lower valve body, and a valve driving part connected in sequence. The upper valve body is provided with a first channel and a second channel on different sides, the lower valve body is provided with a third channel, and the valve driving part includes a valve rod. The valve rod is configured to cooperate with the upper valve body or the lower valve body through reciprocating motion to selectively connect the second channel to the third channel or the first channel.

[0014] As a preferred solution, the filling part includes a filling pipeline connected to the reversing valve group, and valve parts and filling nozzles connected to the filling pipeline.

[0015] As a preferred solution, the filling machine further includes a liquid inlet pipeline and a liquid discharge pipeline. The liquid inlet pipeline is detachably connected to the tank inlet and / or the CIP inlet, and the liquid discharge pipeline is detachably connected to the liquid discharge port and / or the filling part.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The airbag type material guiding mechanism and filling machine provided by the present invention adopt a specially designed airbag type sealing structure. During the filling operation, the airbag sealing ring is pressurized to form a seal between the piston assembly and the cylinder wall, realizing piston type filling. During cleaning and disinfection, the airbag sealing ring is subjected to negative pressure to form a gap between the piston assembly and the cylinder wall, so that the cleaning liquid can thoroughly clean the piston assembly and the cylinder wall, realizing continuous operation of on-line cleaning and disinfection at any time, and there is no need to disassemble the equipment, the operation is simple, and the cleanliness and maintainability are excellent; on the other hand, a specially designed sanitary reversing valve group is used to replace the rotary valve that needs to be disassembled and cleaned, and the inside of the reversing valve group is cleaned through the reversing action of the reversing valve group under the movement of the cleaning liquid and the piston assembly. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the filling machine provided by the embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of a partial structure of the filling machine provided by the embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of a partial structure of the airbag type material guiding mechanism in the embodiment of the present invention (when the airbag seal ring is inflated);

[0021] Figure 4 It is a schematic diagram of a partial structure of the airbag type material guiding mechanism in the embodiment of the present invention (when the airbag seal ring is in a negative pressure state);

[0022] Figure 5 It is a schematic diagram of the structure of the reversing valve group in the embodiment of the present invention.

[0023] The meanings of each label in the figure are as follows:

[0024] 1. Piston driving part; 2. Material storage tank; 3. Tank body feed port; 4. CIP inlet; 5. Liquid level gauge; 6. Quick-release chuck assembly; 7. Reversing valve group; 8. Piston assembly; 9. Cylinder body; 10. End cover; 11. Tank body discharge port; 12. Piston shaft; 13. Material inlet and outlet; 14. Seal ring b; 15. Drain port; 16. Filling nozzle; 17. Valve parts;

[0025] 71. First channel; 72. Second channel; 73. Upper valve body; 74. Lower valve body; 75. Third channel; 76. Linear driving mechanism; 77. Valve rod; 78. Lower valve flap; 79. Upper valve flap;

[0026] 81. Airbag seal ring; 82. Piston guide ring; 83. Air pipe; 84. Air nozzle; 85. Fastener; 86. Seal ring a; 87. Piston pressing plate;

[0027] 21. CIP liquid supply source; 221. First valve; 222. Second valve; 223. First liquid inlet pipeline; 224. Second liquid inlet pipeline; 23. Cleaning ball; 24. Return liquid return pipe; 25. Self-priming pump; 26. CIP station; 271. First drain pipeline; 272. Second drain pipeline. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0030] See Figures 1-4 , this embodiment discloses an airbag type material guiding mechanism for quantitatively guiding liquid materials. The airbag type material guiding mechanism includes a cylinder body 9. The cylinder body 9 has a predetermined length, and the inside of the cylinder body 9 is designed as a cavity for temporarily storing materials. One end of the cylinder body 9 is provided with a material inlet and outlet 13. The material inlet and outlet 13 is usually connected to a storage device and a discharging device through a rotary valve. The temporarily stored materials enter or exit through the material inlet and outlet 13. The other end of the cylinder body 9 is provided with an end cover 10, and the end cover 10 is connected to the other end of the cylinder body 9 through a quick-loading chuck assembly 6. In this embodiment, the quick-loading chuck assembly 6 includes a sanitary chuck, a gasket, and a clamp for sealing connection.

[0031] Inside the cylinder body 9, a piston assembly 8 capable of reciprocating along the length direction of the cylinder body 9 is provided. Through the reciprocating motion of the piston assembly 8, materials are sucked into the cylinder body 9 from the storage device or the materials are pressed out of the cylinder body 9.

[0032] The piston assembly 8 includes a piston pressing plate 87 and a piston shaft 12 connected to the center of the piston pressing plate 87. The piston pressing plate 87 and the piston shaft 12 can be integrally formed, or the piston shaft 12 can be connected to the piston pressing plate 87 through a fastener 85. The fastener 85 is preferably a fixing bolt, and the fixing bolt passes through the piston pressing plate 87 and is threadedly connected to one end of the piston shaft 12. It can be understood that when connected by the fastener 85, the connection between the fastener 85 and the piston pressing plate 87 should be sealed with a sealing ring a86 to prevent liquid from entering.

[0033] In this embodiment, the material guiding mechanism further includes a piston driving part 1 for driving the piston assembly 8 to reciprocate. The piston driving part 1 is arranged outside the cylinder body 9. The other end of the piston shaft 12 passes through the end cover 10 and is connected to the piston driving part 1. The driving part can adopt a linear driving structure including but not limited to a linear cylinder, an electric lead screw, etc. The piston driving part 1 drives the piston shaft 12 and the piston pressing plate 87 to reciprocate inside the cylinder body 9. A sealing ring b14 is provided at the connection between the piston shaft 12 and the end cover 10 to ensure the sealed connection between the piston shaft 12 and the end cover 10 and prevent liquid from leaking from the piston shaft 12 during cleaning and disinfection.

[0034] Refer again Figure 3 and Figure 4 For the convenience of cleaning the interior of the cylinder block 9, in this embodiment, the piston assembly 8 further includes an airbag assembly. The airbag assembly further includes an airbag seal ring 81 sleeved around the periphery of the piston pressing plate 87 and an air pipe 83 communicating with the airbag seal ring 81. The airbag seal ring 81 is provided with an air nozzle 84. One end of the air pipe 83 communicates with the air nozzle 84, and the other end of the air pipe 83 is arranged outside the cylinder block 9 and connected to a gas source device for introducing compressed air or vacuum pumping into the air pipe 83, so as to control the airbag seal ring 81 to be in an inflated and protruding state or an inward concave and compressed state. Specifically, the piston pressing plate 87 is in clearance connection with the inner wall of the cylinder block 9. The airbag seal ring 81 is sleeved around the periphery of the piston pressing plate 87. When the airbag seal ring 81 is in an inflated state, it is in sealed connection with the inner wall of the cylinder block 9. When the airbag seal ring 81 is in a negative pressure state, there is a gap between it and the inner wall of the cylinder block 9, facilitating the passage of the cleaning liquid.

[0035] It can be understood that if the air pipe 83 is separately arranged outside the piston shaft 12, the penetration of the air pipe 83 through the cylinder block 9 will affect the sealing performance of the cylinder block 9. If it penetrates through the connection between the end cover 10 and the piston shaft 12, it will also affect the sealing environment. To solve this problem, in this embodiment, the air pipe 83 is configured as a through channel arranged inside the piston shaft 12 along the length direction of the piston shaft 12. One end of the through channel communicates with the air nozzle 84 of the airbag seal ring 81, and the other end is arranged outside the cylinder block 9 and connected with a pipe joint, and the gas source device is connected through the pipe joint. In other embodiments, the piston shaft 12 can also be set as a hollow shaft structure, and the hollow structure is used as the gas flow channel. This setting method of the air pipe 83 can ensure the sealing environment inside the cylinder block 9 and prevent leakage.

[0036] The airbag type material guiding mechanism provided in this embodiment, through the reciprocating movement of the piston assembly 8, can suck and push materials; at the same time, the airbag seal ring 81 in the airbag assembly can switch between an inflated state and a negative pressure state. The inflated state of the airbag seal ring 81 is the material guiding state. During production, the airbag seal ring 81 is pressurized to form a seal with the inner wall of the cylinder block 9 to realize material guiding. The negative pressure state of the airbag seal ring 81 is the cleaning and disinfection state. In this state, a negative pressure is applied to the airbag seal ring 81 to make it contract and form a gap with the inner wall of the cylinder block 9. When the cleaning liquid enters the interior of the cylinder block 9 from the material inlet and outlet 13 of the cylinder block 9, it can pass through the above gap, facilitating the cleaning of the entire interior of the cylinder block 9 including the airbag seal ring 81. Correspondingly, the cylinder block 9 is provided with a liquid discharge port 15 on one side close to the end cover 10, and the cleaning liquid can be discharged through the liquid discharge port 15, and the cleaning liquid can also be discharged through the material inlet and outlet 13. The airbag type material guiding mechanism provided in this embodiment can realize online cleaning, disinfection and continuous operation, without disassembling the equipment, with simple operation, excellent cleanliness and maintainability.

[0037] To ensure the stable setting of the airbag sealing ring 81 and its perpendicularity to the inner wall of the cylinder block 9, in this embodiment, the piston assembly 8 further includes a piston guide ring 82 connected to one side of the piston pressing plate 87. The piston guide ring 82 is used to guide the airbag sealing ring 81, and the piston guide ring 82 and the piston pressing plate 87 cooperate to form a fixed position for the airbag sealing ring 81, so that it maintains perpendicularity to the cylinder block 9. Specifically, the piston guide ring 82 is provided with a first card slot along the circumferential direction of its outer ring, and the piston pressing plate 87 is provided with a second card slot along the circumferential direction of its outer ring. When the piston guide ring 82 is connected to the piston pressing plate 87, the first card slot and the second card slot are butted and combined to form a groove capable of fixing the airbag sealing ring 81 therein, so that the airbag sealing ring 81 is stably clamped into the groove. The piston pressing plate 87, the piston guide ring 82 and the piston shaft 12 are connected by a fastener 85, and it is also convenient to replace the airbag sealing ring 81 by removing the fastener 85.

[0038] Based on the above airbag type material guiding mechanism, the present invention also provides a filling machine, as Figure 1 and Figure 2 shown, for quantitatively filling liquid materials. The filling machine includes a storage tank 2, a reversing valve group 7, the above airbag type material guiding mechanism and a filling part.

[0039] The storage tank 2 is used for storing materials. Its top is respectively provided with a tank body feed port 3 and a CIP inlet 4, and its bottom is provided with a tank body discharge port 11. The tank body feed port 3 is a material inlet channel, and the CIP inlet 4 is a cleaning liquid or hot water or steam inlet channel. The tank body discharge port 11 is connected to the reversing valve group 7, and is connected to the airbag type material guiding mechanism and the filling part through the reversing valve group 7. The reversing valve group 7 is used to control the conversion of the material flow direction.

[0040] See Figure 5, Specifically, the reversing valve group 7 includes an upper valve body 73, a lower valve body 74, and a valve driving part that are sequentially connected through a quick-connect chuck assembly 6. The top of the upper valve body 73 is connected with a first channel 71, and the first channel 71 is connected to the tank discharge port 11 of the storage tank 2. The first channel 71 and the tank discharge port 11 are connected through the quick-connect chuck assembly 6. Thus, the materials or cleaning liquid in the storage tank 2 can enter the upper valve body 73 through the first channel 71. The upper valve body 73 further includes an upper valve body having an accommodation space and an upper valve seat connected to the top of the upper valve body. The above-mentioned first channel 71 is connected to the top of the upper valve body. A second channel 72 is also provided on the side of the upper valve body, and the second channel 72 communicates with the material inlet and outlet 13 of the cylinder block 9, and the two are connected through the quick-connect chuck assembly 6. The lower valve body 74 includes a lower valve body having an accommodation space and a lower valve seat connected to the top of the lower valve body. The lower valve seat is connected to the bottom end of the upper valve body through the quick-connect chuck assembly 6. A third channel 75 is provided on the side of the lower valve body, and the third channel 75 communicates with the filling part through the quick-connect chuck assembly 6. The third channel 75 and the second channel 72 are usually arranged on different sides to prevent interference with each other, and can be specifically set according to the equipment installation environment. The valve driving part includes a linear driving mechanism 76 connected to the bottom end of the lower valve body 74 through a fixed bracket. The lower valve body 74 and the linear driving mechanism 76 are sealed through a shaft seal to prevent leakage. The output end of the linear driving mechanism 76 is connected to a valve stem 77. The top of the valve stem 77 is connected with an upper valve flap 79, and the valve stem 77 is connected with a lower valve flap 78 near the top. The upper valve flap 79 matches the inner diameter of the upper valve seat, and the lower valve flap 78 matches the inner diameter of the lower valve seat, and the distance between the upper valve flap 79 and the lower valve flap 78 should be less than the distance between the upper valve seat and the lower valve seat. The valve stem 77 extends into the lower valve body 74 and the upper valve body 73, and the linear driving mechanism 76 drives the valve stem 77 to move reciprocally.

[0041] Traditional filling machines usually use rotary valves to control the flow direction. There are gaps in the rotary valves due to the rotation of the rotating shaft, which is easy to accumulate materials and difficult to clean. Usually, it is necessary to disassemble the rotary valve for thorough cleaning. However, the reversing valve group 7 structure in this embodiment has a self-cleaning function. Under the movement of the cleaning liquid and the piston assembly 8, the inside of the valve group can be cleaned by the up and down movement of the valve stem 77 without disassembly.

[0042] When the valve stem 77 is in the jacking state, the upper valve flap 79 and the upper valve seat cooperate to seal the upper valve seat, and the lower valve seat is in the open state; when the valve stem 77 is in the descending state, the lower valve flap 78 and the lower valve seat cooperate to seal the lower valve seat, and the upper valve seat is in the open state. Combining with the material filling step, this process is further explained as follows: during material filling, the linear drive mechanism 76 is activated to drive the valve stem 77 to move downward. At this time, the upper valve flap 79 and the upper valve seat are separated, the upper valve seat is opened, and at the same time, the lower valve flap 78 and the lower valve seat are sealed and closed. The material enters the accommodating space of the upper valve body through the first channel 71 and is sucked into the cylinder body 9 through the second channel 72. Then, the linear drive mechanism 76 switches the drive mode to drive the valve stem 77 to move upward. At this time, the upper valve flap 79 and the upper valve seat are sealed and closed, and at the same time, the lower valve flap 78 and the lower valve seat are separated, the lower valve seat is opened, and the piston drive part 1 of the airbag type material guiding mechanism drives the piston assembly 8 to move to press the material out of the cylinder body 9 and enter the accommodating space of the lower valve body, and enters the filling part through the third channel 75.

[0043] For the convenience of liquid level control in the storage tank 2, in this embodiment, a liquid level gauge 5 is further connected to the top of the storage tank 2. By providing a liquid level position signal through the liquid level gauge 5, the material feeding amount can be controlled to keep the material level in a stable state all the time.

[0044] The filling part includes a filling pipeline connected to the third channel 75, and valve parts 17 and a filling nozzle 16 connected to the filling pipeline. The filling nozzle 16 is the material outlet, and the material is filled into the packaging through the filling nozzle 16. The valve parts 17 can adopt valve structures including but not limited to cut-off valves, stop valves, etc. to seal the filling nozzle 16 to prevent dripping.

[0045] During the filling operation, the material to be filled enters the storage tank 2 through the tank body feed port 3, and the liquid level signal is transmitted to the control system through the liquid level gauge 5 to control the material feeding amount to keep the material level stable. The air pipe 83 accesses low-pressure compressed air to inflate the airbag sealing ring 81 in the piston assembly 8 to realize the sealing between the piston assembly 8 and the inner wall of the cylinder body 9. When filling, the reversing valve group 7 is activated, the upper valve seat is opened and the lower valve seat is closed at the same time, and the piston drive part 1 provides a reciprocating motion for the piston assembly 8 to suck the material from the storage tank 2 into the cylinder body 9; then the valve parts 17 of the filling part are opened, and the reversing valve group 7 switches the flow direction to close the upper valve seat and open the lower valve seat at the same time. Under the thrust of the piston assembly 8, the material is pressed out of the cylinder body 9 and discharged through the filling nozzle 16. After the stroke is completed, the valve parts 17 are closed, and the above actions are continued to be repeated for continuous filling.

[0046] In another embodiment, the filling machine further includes a liquid inlet pipeline and a liquid discharge pipeline to provide a more complete filling machine cleaning solution. The liquid inlet pipeline includes a first liquid inlet pipeline 223 and a second liquid inlet pipeline 224. The first liquid inlet pipeline 223 is connected to the CIP liquid supply source 21 through a first valve 221. The other end of the first liquid inlet pipeline 223 enters from the CIP inlet 4 and is connected to the cleaning ball 23, and the cleaning liquid is sprayed through the cleaning ball 23 to clean the storage tank 2. The second liquid inlet pipeline 224 is connected to the CIP liquid supply source 21 through a second valve 222, and the other end of the second liquid inlet pipeline 224 is connected to the feed inlet for cleaning the feed pipeline. The liquid discharge pipeline includes a first liquid discharge pipeline 271 and a second liquid discharge pipeline 272. The first liquid discharge pipeline 271 is connected to the filling nozzle 16, and the second liquid discharge pipeline 272 is connected to the liquid discharge port 15. Both the first liquid discharge pipeline 271 and the second liquid discharge pipeline 272 are connected to the liquid return manifold pipe, and the liquid return manifold pipe is connected to the CIP station 26 through a self-priming pump 25. It can be understood that the connection between the liquid inlet pipeline and the storage tank 2, and the connection between the liquid discharge pipeline and the filling nozzle 16 and the liquid discharge port 15 are all detachable connections, which are convenient for disassembly, cleaning, and switching of the filling mode.

[0047] During the cleaning operation, the actions of the piston assembly 8 and the reversing valve group 7 are the same as those during the material filling operation. After the cleaning liquid enters the storage tank 2, it enters the upper valve body 73 from the tank body discharge port 11 and the first channel 71, and enters the cylinder body 9 through the second channel 72 and the material inlet and outlet 13. The cleaning liquid passes through the gap between the airbag seal ring 81 and the inner wall of the cylinder body 9, and the piston assembly 8 reciprocates in the cylinder body 9 to discharge the cleaning liquid in two ways. One way of the cleaning liquid cleans the piston assembly 8 and part of the cylinder body 9 and is discharged through the liquid discharge port 15 to the second liquid discharge pipeline 272, and the other way of the cleaning liquid enters the filling pipeline through the lower valve body 74 and the third channel 75 and is discharged through the filling nozzle 16 to the first liquid discharge pipeline 271. The two groups of liquid discharge pipelines converge at the liquid return manifold pipe and then return to the CIP station 26 through the self-priming pump 25.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A method of using a filling machine, characterized in that, Comprising: An airbag type material guiding mechanism, the airbag type material guiding mechanism comprising: A cylinder block (9), the interior of the cylinder block (9) being a cavity, and one end of the cylinder block (9) being provided with a material inlet and outlet (13); A piston assembly (8), including a piston pressing plate (87) disposed inside the cylinder block (9) and a piston shaft (12) connected to the piston pressing plate (87), the piston shaft (12) being configured to drive the piston pressing plate (87) to reciprocate along the length direction of the cylinder block (9), the piston assembly (8) further including an airbag assembly, the airbag assembly including an airbag sealing ring (81) sleeved around the periphery of the piston pressing plate (87), the airbag sealing ring (81) being in sealed connection with the inner wall of the cylinder block (9) in the inflated state and in clearance connection with the inner wall of the cylinder block (9) in the negative pressure state; It further includes the following material guiding and cleaning methods: The airbag sealing ring (81) in the airbag assembly can be switched between the inflated state and the negative pressure state. The inflated state of the airbag sealing ring (81) is the material guiding state. Pressurizing the airbag sealing ring (81) causes the airbag sealing ring (81) to form a seal with the inner wall of the cylinder block (9) to achieve material guiding; the negative pressure state of the airbag sealing ring (81) is the cleaning and disinfection state. In this state, applying negative pressure to the airbag sealing ring (81) causes the airbag sealing ring (81) to contract and form a gap with the inner wall of the cylinder block (9). Through this gap, the airbag sealing ring (81) and the interior of the cylinder block (9) are cleaned.

2. The method of using a filling machine according to claim 1, characterized in that, The airbag assembly further includes an air pipe (83) communicating with the airbag sealing ring (81), and the other end of the air pipe (83) is disposed outside the cylinder block (9) for connecting to a gas source device.

3. The method for using a filling machine according to claim 2, characterized in that The air pipe (83) is configured as a through channel provided inside the piston shaft (12) along the length direction of the piston shaft (12).

4. The method for using a filling machine according to claim 1, wherein The cylinder block (9) is further provided with a liquid discharge port (15) on the side away from the material inlet and outlet (13).

5. The method of using a filling machine according to claim 1, characterized in that, The piston assembly (8) further includes a piston guide ring (82) connected to one side of the piston pressing plate (87), and the piston guide ring (82) and the piston pressing plate (87) cooperate to form a fixed position for the airbag sealing ring (81).

6. The method for using a filling machine according to claim 1, characterized in that It further includes: A storage tank (2), a reversing valve group (7) and a filling part. The top of the storage tank (2) is provided with a tank body feed port (3) and a CIP inlet (4), and the bottom is provided with a tank body discharge port (11). The reversing valve group (7) is respectively connected to the tank body discharge port (11), the material inlet and outlet (13) and the filling part. The reversing valve group (7) is configured to selectively connect the material inlet and outlet (13) to the tank body discharge port (11) or the filling part, and the filling part is used to fill the material into the packaging.

7. The method of using a filling machine according to claim 6, characterized in that The top of the storage tank (2) is further connected with a liquid level gauge (5), and the liquid level gauge (5) is used to control the material feed amount.

8. The method of using a filling machine according to claim 6, characterized in that, The reversing valve group (7) includes an upper valve body (73), a lower valve body (74) and a valve driving part connected in sequence. The upper valve body (73) is respectively provided with a first channel (71) and a second channel (72) on different sides. The lower valve body (74) is provided with a third channel (75). The valve driving part includes a valve rod (77). The valve rod (77) is configured to cooperate with the upper valve body (73) or the lower valve body (74) through reciprocating motion, so that the second channel (72) can selectively communicate with the third channel (75) or the first channel (71).

9. The method for using a filling machine according to claim 6, characterized in that The filling part includes a filling pipeline connected to the reversing valve group (7), and a valve member (17) and a filling nozzle (16) connected to the filling pipeline.

10. The method of using a filling machine according to claim 6, characterized in that, The filling machine further includes a liquid inlet pipeline and a liquid discharge pipeline. The liquid inlet pipeline is detachably connected to the tank body feed port (3) and / or the CIP inlet (4). The liquid discharge pipeline is detachably connected to the liquid discharge port (15) and / or the filling part.

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