Sterile filling machine and sterile filling method

Abstract

The invention relates to a sterile filling machine and a sterile filling method. A sterile filling machine comprises a machine frame, at least one lifting module is installed on the machine frame in a matched mode, the output end of the single lifting module is connected with a filling module, and a conveying base used for conveying packaging bags is arranged below the single filling module. Each conveying base conveys a packaging bag to the position under the corresponding filling module, and the corresponding lifting module drives the filling module to do linear motion of ascending or descending in the vertical direction, so that the filling module reaches the filling position, and then the packaging bag is filled through the filling module. By arranging the filling module, cover pulling and covering can be automatically conducted in a filling cavity, the working efficiency is effectively improved, liquid materials in a packaging bag can be effectively prevented from being polluted, and the product quality and safety are improved; and accurate quantitative filling can be achieved, the filling precision is improved, and the consistency of product specifications is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and in particular to a sterile filling machine and a sterile filling method. Background Art

[0002] A food filling machine is a device for filling in a sterile environment, mainly used for filling sterilized beverage products into sterile containers in a sterile environment and sealing them to ensure that the products have a long shelf life without refrigeration.

[0003] In the prior art, the structure of the filling machine mainly includes a filling chamber, a filling head and a steam sterilization system. The filling chamber is sprayed with steam through the steam sterilization system for sterilization. Subsequently, the opened packaging bag is placed into the filling chamber, and liquid material is filled into the packaging bag through the filling head to complete the filling. However, the traditional filling machine has the following problems:

[0004] (1) The method of manually removing and installing the caps has low work efficiency; and installing the caps on the packaging bag in a normal temperature environment after filling easily causes the material in the bag to be contaminated, and the control of its sterile environment is relatively rough, making it difficult to achieve true sterile packaging, which affects the quality and safety of the products.

[0005] (2) Relying on the weighing sensor to control the filling volume, affected by the accuracy of the weighing sensor and various external factors (material fluidity, steam temperature), it is usually difficult to meet the high-precision filling requirements, resulting in low filling accuracy and affecting the consistency of product specifications. Summary of the Invention

[0006] Based on this, it is necessary to provide a sterile filling machine and a sterile filling method for the problems of low work efficiency, difficulty in achieving true sterile packaging, low filling accuracy and poor product specification consistency existing in the filling machine in the prior art.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A sterile filling machine includes a frame, at least one lifting module is cooperatively installed on the frame, the output end of a single lifting module is connected to a filling module, and a conveying seat for conveying packaging bags is arranged below a single filling module;

[0009] A single conveying seat conveys the packaging bag to directly below the corresponding filling module, and the corresponding lifting module drives the filling module to perform a linear motion of rising or falling in the vertical direction, so that the filling module reaches the filling position, and then the packaging bag is filled through the filling module.

[0010] As a further improvement of the above technical solution:

[0011] A single lifting module includes a first mounting plate fixed to the top of the frame. A lifting cylinder is fixed on the first mounting plate. The output end of the lifting cylinder is connected to a connecting seat, and the connecting seat is fixed to the top of the corresponding filling module.

[0012] A single filling module includes a mounting frame. A second mounting plate is fixed to one side of the mounting frame. An outer cover is fitted and mounted on the end face of the second mounting plate. A closed filling cavity is formed between the outer cover and the second mounting plate. A filling hole is opened on the side end face of the outer cover, and the mouth of the corresponding packaging bag extends into the filling cavity through the filling hole.

[0013] On the end face of the second mounting plate, a first clamping mechanism symmetrically arranged relative to the outer cover is fitted and mounted. A second clamping mechanism is fitted and mounted on the outer cover. The two first clamping mechanisms simultaneously clamp the bag body of the corresponding packaging bag, and the second clamping mechanism clamps the mouth of the corresponding packaging bag located in the filling cavity, so as to limit and fix the packaging bag.

[0014] A filling mechanism and an opening / closing mechanism are arranged in the mounting frame. The working end of the opening / closing mechanism extends into the filling cavity, so as to open or close the mouth of the corresponding packaging bag located in the filling cavity. The working end of the filling mechanism extends into the filling cavity, so as to fill through the mouth of the corresponding packaging bag located in the filling cavity.

[0015] The structure of a single first clamping mechanism is as follows: it includes a first clamping cylinder fixed to the end face of the corresponding second mounting plate. The output end of the first clamping cylinder is connected to a first joint. The first joint is hinged to a movable support. The movable support is also hinged to a fixed support fixed to the corresponding second mounting plate. A first clamping plate is arranged on the movable support, and a second clamping plate corresponding to the first clamping plate is arranged on the fixed support.

[0016] When the first clamping cylinder extends or retracts, it drives the movable support to rotate relative to the fixed support through the first joint, so as to drive the first clamping plate to closely adhere to or leave the second clamping plate, and further clamp or loosen the bag body of the corresponding packaging bag.

[0017] The structure of a single second clamping mechanism is as follows: it includes a second clamping cylinder fixed to the top of the corresponding outer cover. The output end of the second clamping cylinder passes through the top end face of the outer cover and extends into the corresponding filling cavity, so as to be connected to a second joint fixed to the inner side wall surface of the corresponding filling cavity.

[0018] Two first link rods are respectively hinged at both ends of the second joint. The end of a single first link rod is hinged to the first section of a second link rod. The middle section of a single second link rod is hinged to the side wall surface of the corresponding outer cover.

[0019] The second clamping cylinder extends or retracts, driving the corresponding second link rods to rotate simultaneously through two first link rods, so that the tail sections of the two second link rods move away from or close to each other, and then the bag mouths of the corresponding packaging bags located in the filling cavity are loosened or clamped through the two second link rods.

[0020] The structure of a single filling mechanism is as follows: it includes a filling hollow shaft, and a filling transmission shaft is concentrically installed inside the filling hollow shaft. One end of the filling transmission shaft is fitted with a blanking sealing ring. The diameter of the filling transmission shaft is smaller than the outer diameter of the filling hollow shaft, so as to form a receiving cavity between the outer side wall surface of the filling transmission shaft and the inner side wall surface of the filling hollow shaft. Through holes are opened on the side wall surface of the filling hollow shaft, and a feed pipe group is fitted in the through holes. Materials are conveyed into the receiving cavity through feeding and filling. A filling port is opened on the bottom wall surface of the filling hollow shaft, and the materials in the receiving cavity flow into the corresponding packaging bag through the filling port.

[0021] The other end of the filling transmission shaft extends to the outside of the filling hollow shaft and is connected to the output end of the filling cylinder assembly. The filling cylinder assembly drives the filling transmission shaft to make a linear forward or backward movement relative to the filling hollow shaft along the axial direction, so that the filling port is closed or opened through the blanking sealing ring.

[0022] A first movable plate is fixed on the outer circumferential surface of the filling hollow shaft, and a first cylinder assembly is fixed on the first movable plate. The output end of the first cylinder assembly is connected to the corresponding second mounting plate.

[0023] The first cylinder assembly extends or retracts, so as to drive the filling hollow shaft to make a reciprocating linear movement relative to the second mounting plate through the first movable plate, and then the filling port extends into the corresponding bag mouth or leaves from the corresponding bag mouth.

[0024] In a single filling mechanism, the filling cylinder assembly includes a first filling cylinder and a second filling cylinder connected in series in sequence. By controlling the piston rods of the first filling cylinder and the second filling cylinder to extend or retract, the gap distance between the inner side wall surface of the filling port and the outer circumferential surface of the filling transmission shaft is adjusted, and then the material flow rate flowing out through the filling port is adjusted.

[0025] The structure of a single lid-opening mechanism is as follows: It includes a driving cylinder. The output end of the driving cylinder is connected to a spherical plain bearing. The spherical plain bearing is hinged to a clamp assembly through a locking pin. The clamp assembly is fixed on the outer circumferential surface of a lid-opening hollow shaft. A second movable plate is fitted and installed on the outer circumferential surface of the lid-opening hollow shaft. The end of the lid-opening hollow shaft is fixed with a lid-opening mounting plate. An opening and closing lid tooling is fitted and installed on the end face of the lid-opening mounting plate. A lid-opening transmission shaft is concentrically installed inside the lid-opening hollow shaft. One end of the lid-opening transmission shaft extends outside the lid-opening hollow shaft and is connected to the output end of a swing cylinder. The other end of the lid-opening transmission shaft extends outside the lid-opening hollow shaft and is connected to the opening and closing lid tooling. The driving cylinder drives the lid-opening hollow shaft to rotate relative to the second movable plate, so that the working end of the opening and closing lid tooling aligns with the corresponding bag mouth.

[0026] A second cylinder assembly is fixed on the second movable plate. The output end of the second cylinder assembly is connected to a third cylinder assembly. The output end of the third cylinder assembly is connected to the corresponding second mounting plate. The third cylinder assembly extends or retracts, so as to drive the lid-opening hollow shaft to make a reciprocating linear motion relative to the second mounting plate through the second movable plate, and further drive the opening and closing lid tooling to approach or leave the corresponding bag mouth.

[0027] The swing cylinder drives the lid-opening transmission shaft to rotate relative to the lid-opening hollow shaft, so as to drive the opening and closing lid tooling to clamp the sealing cap on the corresponding bag mouth, and further pull out the sealing cap under the action of the third cylinder assembly.

[0028] The second cylinder assembly extends or retracts, drives the lid-opening hollow shaft to make a reciprocating linear motion relative to the second mounting plate through the second movable plate, so as to drive the opening and closing lid tooling to approach or leave the corresponding bag mouth, and further press the sealing cap back into the corresponding bag mouth through the opening and closing lid tooling after filling is completed.

[0029] In a single lid-opening mechanism, the structure of the opening and closing lid tooling is as follows: It includes a driving rod connected to the lid-opening transmission shaft. The two ends of the driving rod are respectively hinged with lid-opening connecting rods. A single lid-opening connecting rod is hinged to the middle section of a lid-opening claw. The head section of a single lid-opening claw is hinged to the lid-opening mounting plate. A fixed hinge point is formed between the head section of a single lid-opening claw and the lid-opening mounting plate.

[0030] When the lid-opening transmission shaft rotates, it drives the driving rod to rotate, drives the two lid-opening claws to rotate around the corresponding fixed hinge points respectively through the two lid-opening connecting rods, so that the tail sections of the two lid-opening claws approach or separate, and further clamp or loosen the corresponding sealing cap.

[0031] It further includes a lid-closing pressing block. When the second cylinder assembly extends, it presses the corresponding sealing cap into the bag mouth through the lid-closing pressing block.

[0032] A sterile filling method for a sterile filling machine based on the above includes the following steps:

[0033] S1. Before filling, each filling module is sterilized by steam to provide a sterile environment for the filling operation;

[0034] During sterilization, the steam pressure is 0.4 MPa - 0.6 MPa, the steam temperature is 120 °C - 125 °C, and the sterilization holding time is ≥ 30 min;

[0035] S2. During filling, a packaging bag is conveyed to the designated position through the corresponding conveying seat, and then the corresponding lifting module drives the filling module to move vertically to the filling position;

[0036] The corresponding filling module opens the lid of the corresponding packaging bag;

[0037] Then, in the order of first large-flow filling and then small-flow filling, the corresponding filling module fills the packaging bag until the set weight of the material is filled into the packaging bag;

[0038] During the filling process, steam is continuously introduced into the filling module to maintain the sterile environment inside the corresponding filling module;

[0039] S3. After a batch of packaging bags is filled, the steam supply is stopped, and then a cleaning liquid is introduced into the filling module to clean the filling module.

[0040] The beneficial effects of the present invention are as follows:

[0041] The structure of the present invention is compact and reasonable, and the operation is convenient. By setting the filling module, it can automatically remove and install the lid in the filling cavity, effectively improving the work efficiency, and can effectively avoid the liquid material in the packaging bag from being contaminated, improving the product quality and safety; it can also achieve precise quantitative filling, improve the filling accuracy, and effectively ensure the consistency of the product specifications. Description of the Drawings

[0042] Figure 1 is the structural schematic diagram of the aseptic filling machine of the present invention Figure 1 。

[0043] Figure 2 is the installation structural schematic diagram of the lifting module and the filling module in the present invention.

[0044] Figure 3 is the structural schematic diagram of the filling module in the present invention.

[0045] Figure 4 is the installation structural schematic diagram of the second clamping mechanism and the outer cover in the present invention.

[0046] Figure 5 is the structural schematic diagram of the filling mechanism in the present invention.

[0047] Figure 6 This is a full cross-sectional view of the filling mechanism in the present invention.

[0048] Figure 7 This is a schematic structural view of the lid-opening mechanism in the present invention.

[0049] Figure 8 It is Figure 7 the right view of

[0050] Figure 9 This is a full cross-sectional view of the lid-opening mechanism in the present invention.

[0051] Figure 10 It is the schematic structure of the aseptic filling machine of the present invention Figure 2 .

[0052] Wherein: 1. First clamping mechanism; 2. Second clamping mechanism; 3. Frame; 4. Electric control cabinet; 5. Filling mechanism; 6. Lid-opening mechanism; 7. Conveyor container; 8. Conveyor seat; 9. Lifting cylinder; 10. Connecting seat; 11. First mounting plate; 12. Second mounting plate; 13. Outer cover; 14. Lifting guide post; 15. Mounting frame; 16. Filling hole;

[0053] 101. First clamping cylinder; 102. First joint; 103. Movable support; 104. Fixed support; 105. First clamping plate; 106. Second clamping plate;

[0054] 201. Second clamping cylinder; 202. Second joint; 203. First connecting rod; 204. Second connecting rod; 205. First concave arc surface; 206. Limit block; 207. Limit plate;

[0055] 501. First cylinder assembly; 502. First movable plate; 503. First filling cylinder; 504. Second filling cylinder; 505. Filling transmission shaft; 506. Filling hollow shaft; 507. Accommodating cavity; 508. Filling port; 509. Plugging sealing ring; 510. Filling sleeve; 511. Guide post assembly; 512. Bearing seat assembly;

[0056] 601. Second cylinder assembly; 602. Second movable plate; 603. Third cylinder assembly; 604. Swing cylinder; 605. Driving cylinder; 606. Lid-opening transmission shaft; 607. Lid-opening sleeve; 608. Lid-opening hollow shaft; 609. Lid-opening mounting plate; 610. Driving rod; 611. Lid-opening connecting rod; 612. Lid-opening jaw; 613. Second concave arc surface; 614. Limit rod; 615. Cover-closing pressing block; 616. Spherical plain bearing; 617. Lock pin; 618. Clamp assembly. Specific embodiments

[0057] The following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

[0058] The structure and function of the present invention are as follows:

[0059] As Figures 1 - 10 shown, a sterile filling machine includes a frame 3, on which at least one lifting module is cooperatively installed. The output end of a single lifting module is connected to a filling module, and a conveying seat 8 for conveying packaging bags is arranged below a single filling module; a single conveying seat 8 conveys the packaging bags to directly below the corresponding filling module, and the corresponding lifting module drives the filling module to perform a linear motion of rising or falling in the vertical direction, so that the filling module reaches the filling position, and then the packaging bags are filled through the filling module. As Figure 1 、 Figure 10 shown, in this embodiment, one or two or more filling modules can be provided on the frame 3, and different filling modules work independently of each other, which can effectively improve the filling efficiency.

[0060] In this embodiment, the packaging bag is in the form of a sterile bag, which is made of polyethylene particles as raw materials, and has the properties of being sterile, non-toxic, excellent low-temperature resistance, good chemical stability, electrical insulation, etc., and is often used as an inner packaging bag in the food industry. The structure of the sterile bag includes a bag body, an opening is provided on the bag body to form a bag mouth, and a sealing cover is installed in the bag mouth. The sealing cover can be in the form of a flat cover or a box cover of other specifications, and is mainly used to seal the bag mouth. In the initial state of the sterile bag, there is a gap of about 5 mm between the sealing cover and the bag mouth, so as to facilitate subsequent opening of the cover through an opening and closing cover tooling; when installing the cover, it is necessary to eliminate the gap between the sealing cover and the bag mouth and press the sealing cover completely into the bag mouth to realize the sealing of the packaging bag.

[0061] Since the sterile bag is a flexible packaging bag, in this embodiment, at least one conveying container 7 is configured on a single conveying seat 8, and the packaging bag is supported by the conveying container 7 to facilitate conveying.

[0062] As Figures 1 - 2 shown, a single lifting module includes a first mounting plate 11 fixed to the top of the frame 3. A lifting cylinder 9 is fixed on the first mounting plate 11, and the output end of the lifting cylinder 9 is connected to a connecting seat 10, and the connecting seat 10 is fixed to the top of the corresponding filling module. By setting the lifting cylinder 9, it is used to drive the corresponding filling module to perform a linear motion of rising or falling in the vertical direction, so that the filling hole 16 can be aligned with the bag mouth of the packaging bag; specifically, when filling is required, the corresponding lifting cylinder 9 extends, driving the filling module to descend in the vertical direction, so that the filling hole 16 is aligned with the bag mouth of the packaging bag; when filling is completed, the corresponding lifting cylinder 9 retracts, driving the filling module to rise in the vertical direction, so as to facilitate driving the packaging bag to leave the feeding through the conveying container 7. In addition, in order to improve the motion stability of the filling module, several lifting guide columns 14 are cooperatively installed between a single first mounting plate 11 and the corresponding filling module.

[0063] As shown Figures 2 - 3 in the figure, a single filling module includes a mounting frame 15. On one side of the mounting frame 15, a second mounting plate 12 is fixed. An outer cover 13 is fitted on the end face of the second mounting plate 12. A closed filling cavity is formed between the outer cover 13 and the second mounting plate 12. A filling hole 16 is opened on the side end face of the outer cover 13. The mouth of the corresponding packaging bag extends into the filling cavity through the filling hole 16. On the end face of the second mounting plate 12, a first clamping mechanism 1 symmetrically arranged relative to the outer cover 13 is fitted. A second clamping mechanism 2 is fitted on the outer cover 13. The two first clamping mechanisms 1 simultaneously clamp the bag body of the corresponding packaging bag, and the second clamping mechanism 2 clamps the mouth of the corresponding packaging bag located in the filling cavity, so as to limit and fix the packaging bag. A filling mechanism 5 and an opening / closing mechanism 6 are arranged in the mounting frame 15. The working end of the opening / closing mechanism 6 extends into the filling cavity, so as to open or close the mouth of the corresponding packaging bag located in the filling cavity. The working end of the filling mechanism 5 extends into the filling cavity, so as to perform filling through the mouth of the corresponding packaging bag located in the filling cavity. Observation windows are respectively opened on the opposite side walls of the outer cover 13. Transparent glasses are fitted in both of the two observation windows, which is convenient for the operator to observe the working conditions of the internal components of the cavity. In addition, a sensor assembly is fitted on a single second mounting plate 12. The detection end of the sensor assembly extends into the filling cavity for detecting whether a sealing cover is installed on the mouth of the bag, so as to realize automatic opening and closing of the cover.

[0064] As shown Figure 3 in the figure, the structure of a single first clamping mechanism 1 is as follows: it includes a first clamping cylinder 101 fixed on the end face of the corresponding second mounting plate 12. The output end of the first clamping cylinder 101 is connected to a first joint 102. The first joint 102 is hinged to a movable support 103. The movable support 103 is also hinged to a fixed support 104 fixed on the corresponding second mounting plate 12. A first clamping plate 105 is arranged on the movable support 103. A second clamping plate 106 corresponding to the first clamping plate 105 is arranged on the fixed support 104. When the first clamping cylinder 101 extends or retracts, the movable support 103 is driven to rotate relative to the fixed support 104 through the first joint 102, so as to drive the first clamping plate 105 to closely adhere to or leave the second clamping plate 106, and further clamp or loosen the bag body of the corresponding packaging bag. Since the aseptic bag has a large capacity and a soft material, by setting the first clamping mechanism 1, the bag body can be clamped during filling, thus improving the working stability of the filling machine.

[0065] As shown Figure 4As shown in the figure, the structure of a single second clamping mechanism 2 is as follows: It includes a second clamping cylinder 201 fixed to the top of the corresponding outer cover 13. The output end of the second clamping cylinder 201 passes through the top end face of the outer cover 13 and extends into the corresponding filling cavity, and is thus connected to a second joint 202 fixed to the inner side wall surface of the corresponding filling cavity. Both ends of the second joint 202 are respectively hinged with a first connecting rod 203. The end of a single first connecting rod 203 is hinged to the head section of a second connecting rod 204. The middle section of a single second connecting rod 204 is hinged to the side wall surface of the corresponding outer cover 13. When the second clamping cylinder 201 extends or retracts, the corresponding second connecting rods 204 are respectively driven by the two first connecting rods 203 to rotate simultaneously, so that the tail sections of the two second connecting rods 204 move away from or close to each other, and further, the bag mouths of the corresponding packaging bags located in the filling cavity are loosened or clamped by the two second connecting rods 204. The second clamping mechanism 2 is used to clamp and limit the bag mouths, so as to avoid the shaking of the bag mouths during the operation of the filling machine and further improve the working stability of the filling machine.

[0066] A limiting block 206 is also arranged in a single second clamping mechanism 2. The limiting block 206 is fixed to the inner side wall surface of the corresponding outer cover 13 and is located directly below the corresponding filling hole 16. Symmetrically arranged limiting plates 207 are respectively installed on both sides of the limiting block 206. A limiting chute is opened on a single limiting plate 207. The limiting chutes are arranged in one-to-one correspondence with the second connecting rods 204. When the two second connecting rods 204 make opening and closing movements, the tail sections of the two second connecting rods 204 respectively slide in the corresponding limiting chutes, thus effectively improving the movement stability of the second connecting rods 204.

[0067] In addition, in a single second clamping mechanism 2, first concave arc surfaces 205 are respectively opened on the end faces of the two second connecting rods 204. The two first concave arc surfaces 205 are symmetrically arranged, and the set positions of the two first concave arc surfaces 205 correspond to the position of the filling hole 16, so that the outer side wall shape of the bag mouth can be stably fitted when the two second connecting rods 204 are closed, and the clamping force is further improved.

[0068] As Figures 5 - 6As shown in the figure, the structure of a single filling mechanism 5 is as follows: It includes a filling hollow shaft 506. Inside the filling hollow shaft 506, a filling transmission shaft 505 is coaxially installed. At one end of the filling transmission shaft 505, a material blocking sealing ring 509 is fitted. The diameter of the filling transmission shaft 505 is smaller than the outer diameter of the filling hollow shaft 506, so that a receiving cavity 507 is formed between the outer side wall surface of the filling transmission shaft 505 and the inner side wall surface of the filling hollow shaft 506. Through holes are provided on the side wall surface of the filling hollow shaft 506, and a feed pipe group is fitted in the through holes. Materials are transported into the receiving cavity 507 through filling. A filling port 508 is provided on the bottom wall surface of the filling hollow shaft 506. The materials in the receiving cavity 507 flow into the corresponding packaging bags through the filling port 508. The other end of the filling transmission shaft 505 extends outside the filling hollow shaft 506 and is connected to the output end of the filling cylinder assembly. The filling cylinder assembly drives the filling transmission shaft 505 to make a linear forward or backward movement along the axis relative to the filling hollow shaft 506, so that the filling port 508 is closed or opened through the material blocking sealing ring 509. A first movable plate 502 is fixed on the outer circumferential surface of the filling hollow shaft 506. A first cylinder assembly 501 is fixed on the first movable plate 502. The output end of the first cylinder assembly 501 is connected to the corresponding second mounting plate 12. The first cylinder assembly 501 extends or retracts, so that the filling hollow shaft 506 is driven by the first movable plate 502 to make a reciprocating linear movement relative to the second mounting plate 12, and then the filling port 508 extends into the corresponding bag mouth or leaves from the corresponding bag mouth. By setting the filling mechanism 5, its stroke of the filling cylinder assembly is controlled based on time parameters, so that high-precision filling can be achieved.

[0069] In a single filling mechanism 5, the filling cylinder assembly includes a first filling cylinder 503 and a second filling cylinder 504 connected in series in sequence. By controlling the piston rods of the first filling cylinder 503 and the second filling cylinder 504 to extend or retract, the gap distance between the inner side wall surface of the filling port 508 and the outer circumferential surface of the filling transmission shaft 505 is adjusted, and then the material flow rate flowing out through the filling port 508 is adjusted. In this embodiment, the filling mechanism 5 has a large-flow filling model and a small-flow filling model. In the large-flow filling mode, both the first filling cylinder 503 and the second filling cylinder 504 retract. In the small-flow filling model, one of the filling cylinders extends and the other retracts. When both the first filling cylinder 503 and the second filling cylinder 504 extend, the filling port 508 is blocked by the material blocking sealing ring 509 and the filling transmission shaft 505 and is in a closed state.

[0070] An outer concentric installation of the filling hollow shaft 506 is provided with a filling sleeve 510. The filling sleeve 510 is fixed to the corresponding second mounting plate 12, so as to be able to support the filling hollow shaft 506 arranged in the horizontal direction. A sealing ring assembly is used for sealing installation between the filling sleeve 510 and the filling hollow shaft 506, so as to ensure that the sterile environment in the filling cavity is not polluted when the filling machine is working.

[0071] In addition, in order to further improve the working stability of the filling mechanism 5, a guide post assembly 511 is fixed on the first movable plate 502. The guide post assembly 511 is cooperatively installed with a bearing seat assembly 512. The bearing seat assembly 512 is fixed to the mounting frame 15. When the first movable plate 502 makes a linear motion in the horizontal direction, the guide post assembly 511 slides relative to the bearing seat assembly 512.

[0072] Such as Figures 7 - 9As shown in the figure, the structure of a single lid-opening mechanism 6 is as follows: It includes a driving cylinder 605. The output end of the driving cylinder 605 is connected to a spherical plain bearing 616. The spherical plain bearing 616 is hinged to a clamp assembly 618 through a locking pin 617. The clamp assembly 618 is fixed on the outer circumferential surface of the lid-opening hollow shaft 608. A second movable plate 602 is fitted and installed on the outer circumferential surface of the lid-opening hollow shaft 608. The end of the lid-opening hollow shaft 608 is fixed with a lid-opening mounting plate 609. A lid-opening and closing tooling is fitted and installed on the end face of the lid-opening mounting plate 609. A lid-opening transmission shaft 606 is concentrically installed inside the lid-opening hollow shaft 608. One end of the lid-opening transmission shaft 606 extends outside the lid-opening hollow shaft 608 and is connected to the output end of a swing cylinder 604. The other end of the lid-opening transmission shaft 606 extends outside the lid-opening hollow shaft 608 and is connected to the lid-opening and closing tooling. The driving cylinder 605 drives the lid-opening hollow shaft 608 to rotate relative to the second movable plate 602, so that the working end of the lid-opening and closing tooling is aligned with the corresponding bag mouth; A second cylinder assembly 601 is fixed on the second movable plate 602. The output end of the second cylinder assembly 601 is connected to a third cylinder assembly 603. The output end of the third cylinder assembly 603 is connected to the corresponding second mounting plate 12. The third cylinder assembly 603 extends or retracts, so as to drive the lid-opening hollow shaft 608 to make a reciprocating linear motion relative to the second mounting plate 12 through the second movable plate 602, and further drive the lid-opening and closing tooling to approach or leave the corresponding bag mouth; The swing cylinder 604 drives the lid-opening transmission shaft 606 to rotate relative to the lid-opening hollow shaft 608, so as to drive the lid-opening and closing tooling to clamp the sealing cap on the corresponding bag mouth, and then pull out the sealing cap under the action of the third cylinder assembly 603; The second cylinder assembly 601 extends or retracts, drives the lid-opening hollow shaft 608 to make a reciprocating linear motion relative to the second mounting plate 12 through the second movable plate 602, so as to drive the lid-opening and closing tooling to approach or leave the corresponding bag mouth, and then press the sealing cap back into the corresponding bag mouth through the lid-opening and closing tooling after the filling is completed. By setting the second cylinder assembly 601, it is used to press the sealing cap into the corresponding bag mouth after the third cylinder assembly 603 drives the lid-opening and closing tooling to put the sealing cap into the corresponding bag mouth (at this time, there is still a gap of about 5 mm between the sealing cap and the bag mouth), so as to ensure the sealing performance of the packaging bag.

[0073] In a single lid-opening mechanism 6, a lid-opening sleeve 607 is fitted and installed on the outer circumferential surface of the lid-opening hollow shaft 608. The lid-opening sleeve 607 is fixed on the second mounting plate 12. A sealing ring assembly is fitted and installed between the inner side wall surface of the lid-opening sleeve 607 and the outer circumferential surface of the lid-opening hollow shaft 608 to ensure the internal sealing of the filling cavity.

[0074] In the single open / close cover mechanism 6, the structure of the open / close cover tooling is as follows: It includes a driving rod 610 connected to the open cover transmission shaft 606. At both ends of the driving rod 610, there are respectively hinged open cover connecting rods 611. The middle section of a single open cover connecting rod 611 is hinged to the open cover jaw 612. The head section of a single open cover jaw 612 is hinged to the open cover mounting plate 609, and a fixed hinge point is formed between the head section of a single open cover jaw 612 and the open cover mounting plate 609. When the open cover transmission shaft 606 rotates, it drives the driving rod 610 to rotate. Through the two open cover connecting rods 611, the two open cover jaws 612 are respectively driven to rotate around the corresponding fixed hinge points, so that the tail sections of the two open cover jaws 612 approach or separate, and then clamp or loosen the corresponding sealing cover. It also includes a closing cover pressing block 615. When the second cylinder assembly 601 extends, the corresponding sealing cover is pressed into the bag mouth through the closing cover pressing block 615. By setting the open / close cover tooling, the opening and closing of the packaging bag can be automatically carried out in the filling cavity, thus realizing automated production, effectively improving the working efficiency of the filling machine, and reducing the labor cost.

[0075] In the single open cover mechanism 6, a second concave arc surface 613 is provided on the side end surface of the tail section of a single open cover jaw 612. The second concave arc surfaces 613 of the two open cover jaws 612 are symmetrically arranged, so that the open cover jaw 612 can be attached to the side wall surface of the corresponding sealing cover, improving the stability of the open cover operation. A limiting rod 614 is fixed on the open cover mounting plate 609 to limit the opening angle of the two open cover jaws 612 and avoid the problem that the opening angle between the two open cover jaws 612 is too large and cannot be reset.

[0076] An electric control cabinet 4 is installed on the machine frame 3 in a matching manner for realizing the automatic control of the filling machine.

[0077] Based on the above aseptic filling machine, this embodiment provides an aseptic filling method, including the following steps:

[0078] S1. Before filling, each filling module is sterilized by steam to provide a sterile environment for the filling operation;

[0079] During sterilization, the steam pressure is 0.4MPa - 0.6MPa, the steam temperature is 120°C - 125°C, and the sterilization holding time is ≥30min;

[0080] In this embodiment, before filling a batch of materials, the inside of the filling cavity is first sterilized. After the sterilization is completed, an appropriate amount of steam is introduced into the filling cavity, so that the inside of the filling cavity is maintained within a suitable temperature range and a proper positive pressure is maintained. At this time, the inside of the cavity is in a sterile state;

[0081] S1.1. A steam distribution cylinder is fitted and installed on the frame 3. The input end of the steam distribution cylinder is connected to a steam supply source. The steam distribution cylinder is provided with at least one group of steam injection orifice groups, and the steam injection orifice groups are arranged in one-to-one correspondence with the filling modules. A single group of steam injection orifice groups includes at least three steam injection orifices, namely a first steam injection orifice, a second steam injection orifice, and a third steam injection orifice. The steam supply source introduces steam with a certain pressure into the steam distribution cylinder, so as to provide steam for the corresponding filling module through the steam distribution cylinder;

[0082] The first steam injection orifice is connected to a first steam passage hole opened on the filling hollow shaft 506 through a first pipe group. The filling hollow shaft 506 and the filling sleeve 510 are both provided with second steam passage holes, and the second steam passage holes are arranged below the first steam through hole. Both the first steam through hole and the second steam passage hole are located outside the filling cavity; The steam in the steam distribution cylinder is sprayed into the gap between the inner side wall surface of the filling hollow shaft 506 and the outer side wall surface of the filling transmission shaft 505 and into the gap between the outer side wall surface of the filling hollow shaft 506 and the inner side wall surface of the filling sleeve 510 through the first steam injection orifice and the first steam passage hole, so as to form a steam barrier in the gap to prevent dust and impurities outside the filling cavity from entering the filling cavity and contaminating the filling; The rear end of the second steam passage hole is connected to a second pipe group, and the steam in the gap is discharged to the outside of the filling machine through the second steam passage hole and the second pipe group in sequence; A temperature sensor is fitted and installed on the second pipe group through a temperature measuring base. By setting the temperature sensor, it can be feedback whether the steam barrier is in a high-temperature and sterile state;

[0083] The second steam injection orifice is connected to a first steam inlet opened on the second mounting plate 12 through a third pipe group. The steam in the steam distribution cylinder enters the filling cavity through the second steam injection orifice and the first steam inlet in sequence, so as to maintain a high-temperature and sterile environment inside the filling cavity during the filling process;

[0084] The third steam injection orifice is connected to a second steam inlet opened on the second mounting plate 12 through a fourth pipe group. A guiding pipe is fitted and installed inside the second steam inlet, and the end of the guiding pipe faces the filling hole 16; The steam in the steam distribution cylinder is sprayed towards the filling hole 16 through the third steam injection orifice, the second steam inlet, and the guiding pipe in sequence, further improving the product quality;

[0085] A fifth pipe group is installed at the condensate water outlet of the steam distribution cylinder, and a steam trap is fitted and installed on the fifth pipe group. The condensate water generated during the operation of the steam distribution cylinder is discharged externally through the fifth pipe group;

[0086] A drain hole is also opened on the second mounting plate 12, and a sixth pipe group is fitted and installed inside the drain hole. A negative pressure source is installed on the sixth pipe group. Based on the Venturi principle, the condensate water in the filling cavity is sucked out and discharged externally, so as to prevent water accumulation in the filling cavity from affecting the product quality.

[0087] S2. During filling, a packaging bag is conveyed to the designated position through the corresponding conveying seat 8. Subsequently, the corresponding lifting module drives the filling module to move vertically to the filling position;

[0088] The filling module opens the lid of the corresponding packaging bag;

[0089] Then, in the order of first large-flow filling and then small-flow filling, the corresponding filling module fills the packaging bag until the set weight of material is filled into the packaging bag;

[0090] During the filling process, steam is continuously introduced into the filling module to maintain a sterile environment inside the corresponding filling module;

[0091] S2.1. The end of the feed pipe group is connected to the first branch pipe group. The first branch pipe group includes several first branch pipes, and the first branch pipes correspond one by one to the through holes of the filling module. By setting the first branch pipe group, independent feeding to each filling module can be achieved;

[0092] External materials are conveyed to the accommodation cavity 507 through the corresponding first branch pipes of the feed pipe group, and then the packaging bag is filled through the filling port 508;

[0093] S2.2. In the large-flow filling mode, both the first filling cylinder 503 and the second filling cylinder 504 retract, so that the filling port 508 is completely opened, and then the material in the filling cavity flows into the packaging bag in a large flow;

[0094] S2.3. In the small-flow filling mode, the first filling cylinder 503 retracts and the second filling cylinder 504 extends, or the first filling cylinder 503 extends and the second filling cylinder 504 retracts, so that the gap between the outer wall surface of the filling transmission shaft 505 and the inner wall surface of the filling port 508 decreases, and then the material in the filling cavity flows into the packaging bag in a small flow.

[0095] S3. After a batch of packaging bags are filled, the steam supply is stopped, and then cleaning liquid is introduced into the filling module to clean the filling module.

[0096] S3.1. A connecting branch pipe is fitted on the feed pipe group. The connecting branch pipe is connected to the cleaning pipe group through a pneumatic stop valve. The end of the cleaning pipe group is connected to the second branch pipe group. The second branch pipe group includes several second branch pipes, and the second branch pipes correspond one by one to the filling holes 16. By setting the feed pipe group, the cleaning pipe group, the first branch pipe group and the second branch pipe group, it is convenient to clean each filling module independently;

[0097] When cleaning, connect the end of a second branch pipe to the corresponding filling hole 16. The cleaning liquid sequentially passes through the cleaning pipe group, the connecting branch pipe and enters the feeding pipe group, and then sequentially flows through the corresponding first branch pipe, the accommodating cavity 507, the filling port 508 and enters the filling cavity, so as to clean the corresponding filling module.

[0098] Control the flow direction of the cleaning liquid in the pipeline through a pneumatic stop valve, so that the cleaning liquid circulates between the corresponding second branch pipe, the accommodating cavity 507, the filling cavity and the corresponding first branch pipe, thereby improving the cleaning effect.

[0099] The waste liquid after cleaning is discharged sequentially through the filling hole 16, the corresponding second branch pipe and the cleaning pipe group.

[0100] Each pipe group in this embodiment can be in the form of being spliced by several short pipes or in the form of long pipes according to specific usage requirements and installation requirements; in addition, corresponding control valve assemblies are installed on each pipe group and are specifically configured according to actual production requirements.

[0101] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention can be seen in the claims, and any form of modification can be made within the protection scope of the present invention.

Claims

1. An aseptic filling machine, characterized in that: It comprises a frame (3), on which at least one lifting module is mounted, the output end of a single lifting module is connected to a filling module, and a conveying seat (8) for conveying packaging bags is arranged below the single filling module; A single conveying seat (8) conveys the packaging bag to the bottom of the corresponding filling module, and the corresponding lifting module drives the filling module to perform an upward or downward linear motion in the vertical direction, so that the filling module reaches the filling position, and then the packaging bag is filled by the filling module.

2. The aseptic filling machine according to claim 1, characterized in that: A single lifting module comprises a first mounting plate (11) fixed to the top of a frame (3), a lifting cylinder (9) being fixed on the first mounting plate (11), an output end of the lifting cylinder (9) being connected to a connecting seat (10), and the connecting seat (10) being fixed to the top of a corresponding filling module.

3. The aseptic filling machine according to claim 1, characterized in that: A single filling module comprises a mounting frame (15), a second mounting plate (12) is fixed on one side of the mounting frame (15), an outer cover (13) is mounted on the end surface of the second mounting plate (12), a closed filling cavity is formed between the outer cover (13) and the second mounting plate (12), a filling hole (16) is provided on the side end surface of the outer cover (13), and the bag opening of the corresponding packaging bag extends into the filling cavity through the filling hole (16); A first clamping mechanism (1) is mounted on the end surface of the second mounting plate (12) and is symmetrically arranged relative to the outer cover (13); a second clamping mechanism (2) is mounted on the outer cover (13); the two first clamping mechanisms (1) clamp the bag bodies of the corresponding packaging bags at the same time, and the second clamping mechanism (2) clamps the bag openings of the corresponding packaging bags located in the filling cavity, thereby limiting and fixing the packaging bags; A filling mechanism (5) and a cover opening mechanism (6) are arranged in the mounting frame (15); the working end of the cover opening mechanism (6) extends into the filling cavity, thereby opening or closing the bag opening of the corresponding packaging bag located in the filling cavity; the working end of the filling mechanism (5) extends into the filling cavity, thereby filling through the bag opening of the corresponding packaging bag located in the filling cavity.

4. The aseptic filling machine according to claim 3, characterized in that: The structure of a single first clamping mechanism (1) is as follows: it comprises a first clamping cylinder (101) fixed on the end surface of a corresponding second mounting plate (12); the output end of the first clamping cylinder (101) is connected to a first joint (102); the first joint (102) is hinged to a movable support (103); the movable support (103) is further hinged to a fixed support (104) fixed on the corresponding second mounting plate (12); a first clamping plate (105) is arranged on the movable support (103); and a second clamping plate (106) corresponding to the first clamping plate (105) is arranged on the fixed support (104); The first clamping cylinder (101) extends or retracts, and drives the movable support (103) to rotate relative to the fixed support (104) through the first joint (102), thereby driving the first clamping plate (105) to be close to or away from the second clamping plate (106), thereby clamping or loosening the bag body of the corresponding packaging bag.

5. The aseptic filling machine according to claim 3, characterized in that: The structure of a single second clamping mechanism (2) is as follows: it comprises a second clamping cylinder (201) fixed to the top of the corresponding outer cover (13), and the output end of the second clamping cylinder (201) passes through the top end surface of the outer cover (13) and extends into the corresponding filling cavity, thereby connecting with a second connector (202) fixed to the inner wall surface of the corresponding filling cavity; The two ends of the second joint (202) are respectively hinged with a first connecting rod (203), the end of a single first connecting rod (203) is hinged to the first section of a second connecting rod (204), and the middle section of a single second connecting rod (204) is hinged to the side wall surface of the corresponding outer cover (13); The second clamping cylinder (201) extends or retracts, and drives the corresponding second connecting rods (204) to rotate simultaneously through the two first connecting rods (203), so that the tail sections of the two second connecting rods (204) are separated or approached, and then the bag opening of the corresponding packaging bag located in the filling cavity is loosened or clamped through the two second connecting rods (204).

6. The aseptic filling machine according to claim 3, characterized in that: The structure of a single filling mechanism (5) is as follows: it comprises a filling hollow shaft (506), a filling transmission shaft (505) is coaxially mounted inside the filling hollow shaft (506), a material blocking sealing ring (509) is mounted on one end of the filling transmission shaft (505), the diameter of the filling transmission shaft (505) is smaller than the outer diameter of the filling hollow shaft (506), so that a receiving chamber (507) is formed between the outer wall surface of the filling transmission shaft (505) and the inner wall surface of the filling hollow shaft (506), a through hole is provided on the side wall surface of the filling hollow shaft (506), a feeding pipe group is mounted in the through hole, and materials are transported into the receiving chamber (507) through feeding and filling, and a filling port (508) is provided on the bottom wall surface of the filling hollow shaft (506), and the materials in the receiving chamber (507) flow into the corresponding packaging bag through the filling port (508); The other end of the filling transmission shaft (505) extends out of the filling hollow shaft (506) and is connected to the output end of the filling cylinder assembly. The filling cylinder assembly drives the filling transmission shaft (505) to move forward or backward along the axial direction relative to the filling hollow shaft (506), thereby closing or opening the filling port (508) through the blocking sealing ring (509); A first movable plate (502) is fixed on the outer circumferential surface of the filling hollow shaft (506), a first cylinder assembly (501) is fixed on the first movable plate (502), and an output end of the first cylinder assembly (501) is connected to a corresponding second mounting plate (12); The first cylinder assembly (501) extends or retracts, thereby driving the filling hollow shaft (506) to perform reciprocating linear motion relative to the second mounting plate (12) through the first movable plate (502), thereby causing the filling port (508) to extend into the corresponding bag opening, or to leave the corresponding bag opening.

7. The aseptic filling machine according to claim 6, characterized in that: In a single filling mechanism (5), the filling cylinder assembly comprises a first filling cylinder (503) and a second filling cylinder (504) which are connected in series in sequence. By controlling the piston rod of the first filling cylinder (503) and the piston rod of the second filling cylinder (504) to extend or retract, the gap distance between the inner wall surface of the filling port (508) and the outer circumferential surface of the filling transmission shaft (505) is adjusted, thereby adjusting the flow rate of material flowing out of the filling port (508).

8. The aseptic filling machine according to claim 3, characterized in that: The structure of a single cover opening mechanism (6) is as follows: it comprises a driving cylinder (605), the output end of the driving cylinder (605) is connected to a joint bearing (616), the joint bearing (616) is hinged to a clamp assembly (618) via a locking pin (617), the clamp assembly (618) is fixed to the outer circumferential surface of a cover opening hollow shaft (608), a second movable plate (602) is mounted on the outer circumferential surface of the cover opening hollow shaft (608), the end of the cover opening hollow shaft (608) is fixed to a cover opening mounting plate (609), and the end of the cover opening mounting plate (609) is fixed to the outer circumferential surface of the cover opening hollow shaft (608). An opening and closing cover tooling is mounted on the surface, and an opening and closing cover driving shaft (606) is coaxially mounted inside the opening and closing cover hollow shaft (608). One end of the opening and closing cover driving shaft (606) extends out of the opening and closing cover hollow shaft (608) and is connected to the output end of the swing cylinder (604). The other end of the opening and closing cover driving shaft (606) extends out of the opening and closing cover hollow shaft (608) and is connected to the opening and closing cover tooling. The driving cylinder (605) drives the opening and closing cover hollow shaft (608) to rotate relative to the second movable plate (602), so that the working end of the opening and closing cover tooling is aligned with the corresponding bag opening. A second cylinder assembly (601) is fixed on the second movable plate (602), the output end of the second cylinder assembly (601) is connected to a third cylinder assembly (603), the output end of the third cylinder assembly (603) is connected to the corresponding second mounting plate (12), the third cylinder assembly (603) is extended or retracted, thereby driving the cover opening hollow shaft (608) to perform reciprocating linear motion relative to the second mounting plate (12) through the second movable plate (602), thereby driving the cover opening and closing tooling to approach or leave the corresponding bag opening; The swing cylinder (604) drives the cover opening transmission shaft (606) to rotate relative to the cover opening hollow shaft (608), thereby driving the cover opening and closing tooling to clamp the sealing cover on the corresponding bag opening, and then the sealing cover is pulled out under the action of the third cylinder assembly (603); The second cylinder assembly (601) extends or retracts, and drives the hollow cover opening shaft (608) to make reciprocating linear motion relative to the second mounting plate (12) through the second movable plate (602), thereby driving the cover opening and closing tooling to approach or leave the corresponding bag opening, and then after filling is completed, the sealing cover is pressed back into the corresponding bag opening through the cover opening and closing tooling.

9. The aseptic filling machine according to claim 8, characterized in that: In the single cover opening mechanism (6), the structure of the cover opening and closing tooling is as follows: it includes a driving rod (610) connected to the cover opening transmission shaft (606), the two ends of the driving rod (610) are respectively hinged with a cover opening connecting rod (611), the single cover opening connecting rod (611) is hinged to the middle section of the cover opening clamping claw (612), the first section of the single cover opening clamping claw (612) is hinged to the cover opening mounting plate (609), and a fixed hinge point is formed between the first section of the single cover opening clamping claw (612) and the cover opening mounting plate (609); When the cover opening transmission shaft (606) rotates, it drives the driving rod (610) to rotate, and drives the two cover opening clamping claws (612) to rotate around corresponding fixed hinge points through the two cover opening connecting rods (611), so that the tail sections of the two cover opening clamping claws (612) are close to or away from each other, thereby clamping or loosening the corresponding sealing cover; It also includes a cover closing pressing block (615), and when the second cylinder assembly (601) is extended, the corresponding sealing cover is pressed into the bag opening through the cover closing pressing block (615).

10. An aseptic filling method based on the aseptic filling machine according to claim 1, characterized in that: The steps include: S1. Before filling, each filling module is sterilized by steam to provide a sterile environment for the filling operation; During sterilization, the steam pressure is 0.4MPa-0.6MPa, the steam temperature is 120℃-125℃, and the sterilization holding time is ≥30min; S2. During filling, a packaging bag is transported to the position through the corresponding conveying seat (8), and then the corresponding lifting module drives the filling module to move vertically to the filling position; Open the corresponding packaging bag through the filling module; Then, the corresponding filling module fills the packaging bag in a manner of first filling with a large flow rate and then filling with a small flow rate, until the set weight of material is filled into the packaging bag; During the filling process, steam is continuously introduced into the filling module to maintain a sterile environment inside the corresponding filling module; S3. After a batch of packaging bags is filled, the steam supply is stopped, and then a cleaning liquid is introduced into the filling module to clean the filling module.

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