A strut-type conveying clamp and main drive system for a powder-liquid dual-chamber bag

Abstract

This invention relates to the field of powder-liquid dual-chamber bag production equipment, and discloses a strut-type conveying fixture and main drive system for powder-liquid dual-chamber bags. The conveying fixture includes a fixture body, a strut mechanism, a left arm, and a right arm. The strut mechanism, located between the left and right arms, includes a housing, a rod, a tension spring, a pawl, and a compression spring. One end of the rod extends into the housing and can slide back and forth inside the housing. The tension spring is located inside the housing, with both ends connected to the housing and the rod, respectively. The pawl is located in the gap between the housing and the rod, with one end hinged to the rod. The compression spring is located between the pawl and the rod. The housing has a locking slot for engaging with the pawl. This invention, by adding a strut mechanism to the conveying fixture, enables the fixture to have a self-locking function. Simultaneously, in conjunction with the main drive system, it achieves autonomous opening and closing, self-locking, and reliable reset of the powder-liquid dual-chamber bags, ensuring the stability of the bags during transport between workstations.

Description

Technical Field

[0001] This invention relates to the field of powder-liquid dual-chamber bag production equipment, and more particularly to a strut-type conveying clamp for powder-liquid dual-chamber bags and a main drive system using the strut-type conveying clamp. Background Technology

[0002] The powder-liquid dual-chamber bag is a ready-to-use infusion product for intravenous drip administration. It consists of two parts: a liquid chamber containing the injectable solvent and a powder chamber containing the drug powder, separated by a weakly welded partition. During use, medical personnel simply squeeze the liquid chamber to open the weakly welded partition, allowing the injectable solvent and drug powder in both chambers to mix thoroughly.

[0003] Currently, the production of powder-liquid dual-chamber bag products requires the use of a powder dispensing machine for aseptic production. (See attached image) Figure 1-3 As shown, the frame 2 of the powder filling machine is sequentially equipped with a bag loading station 21, a bag washing station 22, a bag cutting station 23, a bag opening station 24, a filling station 25, an inflation station 26, a welding station 27, and a bag unloading station 28. The powder filling machine also includes a main drive system consisting of a guide rail 3, a conveyor timing belt 4, a conveyor clamp 5, and a drive device. The main drive system is used to drive the powder-liquid dual-chamber bag 1 sequentially through each station.

[0004] Specifically, during the manufacturing process, each powder-liquid dual-chamber bag 1 is suspended and fixed on a conveying fixture 5 with the bag opening 12 facing upwards and the tube opening 11 facing downwards. A separating strip 13 separates the powder chamber from the liquid chamber. (See attached...) Figure 2 As shown, a circular through hole is provided at the bag opening 12, allowing it to be suspended and fixed on the conveying clamp 5. Furthermore, state a represents the powder-liquid dual-chamber bag 1 when the bag opening 12 is not open; state b represents the bag opening 12 when open; and state c represents the powder-liquid dual-chamber bag 1 when the bag opening 12 is closed. All conveying clamps 5 engage with the guide rail 3 via sliding wheels 54 located at their center, enabling the powder dispensing machine to sequentially transport the powder-liquid dual-chamber bags 1 along the guide rail 3 to different workstations, thereby cooperating with other devices at each workstation to complete the operation. Furthermore, all conveying clamps 5 are connected to the synchronous conveyor belt 4, ensuring that each conveying clamp 5 moves synchronously on the guide rail 3.

[0005] In actual production, the following shortcomings were found in the existing main drive system: First, the existing conveying fixture 5 only has the function of fixing the powder-liquid double-chamber bag 1. After conveying the powder-liquid double-chamber bag 1 to the workstation that needs to keep the double-chamber bag open (such as the dispensing workstation 25 and the inflation workstation 26), it needs to cooperate with an external bag-opening suction cup to open and close the bag opening 12 on the powder-liquid double-chamber bag 1. Since the bag-opening suction cup needs a certain stroke to complete the opening and closing action of the bag opening 12, the opening and closing efficiency of the powder-liquid double-chamber bag 1 is not high. Moreover, the opening and closing of the bag opening 12 depends entirely on the suction force of the bag-opening suction cup. If the suction force is insufficient, the opening and closing of the powder-liquid double-chamber bag 1 will be unstable.

[0006] Secondly, the existing main drive system cannot effectively keep the bag opening 12 open at the dispensing station 25 and the inflation station 26. The existing conveying clamp 5 requires external force to maintain the opening angle during the conveying process, which makes it easy for the opening of the powder-liquid double-chamber bag 1, which has already been opened, to close or twist and deform during the operation of the main drive system, seriously affecting the powder dispensing quality and inflation effect.

[0007] Third, the existing conveyor clamp 5 has a complex opening and closing control mechanism and lacks a reliable self-locking function. Since the powder and liquid dual-chamber bag 1 needs to be conveyed between different workstations while keeping the bag opening 12 open, a complex opening and closing control mechanism is required. However, the current opening and closing control mechanism does not have an automatic locking function after the bag opening 12 is in place, which leads to an unstable opening and closing angle of the bag opening 12, affecting the accuracy and reliability of subsequent dispensing, inflation and sealing processes.

[0008] Fourth, the transitions between fixture states in the existing main drive system are not smooth enough, requiring manual intervention or additional auxiliary mechanisms, which undoubtedly reduces production efficiency and automation.

[0009] To address the aforementioned issues, it is necessary to improve the main drive system of the existing powder-liquid dual-chamber bag 1 powder dispensing machine. Summary of the Invention

[0010] To address the problems existing in the prior art, the main drive system of the current powder-liquid dual-chamber bag dispensing machine cannot autonomously open and close the bag and does not have a self-locking function after the bag opening is opened. The purpose of this invention is to provide a strut-type conveying clamp and main drive system for powder-liquid dual-chamber bags. By adding a strut mechanism to the conveying clamp, the conveying clamp has a self-locking function. At the same time, in conjunction with the main drive system, it realizes autonomous opening and closing of the powder-liquid dual-chamber bag, realizing automatic bag opening, self-locking and reliable reset of the conveying clamp. There is no need to set up a complex opening and closing control mechanism, and it can ensure the stable state of the bag during the conveying process between each station.

[0011] To achieve the above objectives, the technical solution of the present invention is as follows: A strut-type conveying clamp for a powder-liquid dual-chamber bag includes a clamp body, a left arm, and a right arm. The left and right arms are symmetrically arranged and both hinged to the clamp body. The clamp also includes a strut mechanism located between the left and right arms and below the clamp body. The strut mechanism includes a housing, a rod, a tension spring, a pawl, and a compression spring. One end of the rod extends into the housing and can slide back and forth inside the housing. The tension spring is located inside the housing, and its two ends are fixedly connected to the housing and the end of the rod extending into the housing, respectively. The pawl is located in the gap between the housing and the rod, and the end of the pawl away from the tension spring is hinged and fixed to the rod. The compression spring is located between the pawl and the rod. A latch is provided on the housing near the rod for engaging with the pawl.

[0012] The present invention is further configured such that: the strut mechanism further includes a pressure plate, the pressure plate is provided with a top rod and a torsion spring, the pressure plate is located at the bayonet position, one end of the pressure plate is hinged to the housing through the torsion spring, the top rod is fixed to the side of the pressure plate facing the rod body, and the top rod abuts against the pawl when the pawl is engaged with the bayonet.

[0013] The present invention is further configured such that: the strut mechanism further includes mounting blocks, the two mounting blocks are respectively fixed on the housing and the rod and are respectively located at both ends of the strut mechanism, and the two mounting blocks are respectively hinged to the left upper arm and the right upper arm.

[0014] The invention is further configured such that: the mounting block is spherical and there are gaps between the strut mechanism and both the left and right upper arms.

[0015] The invention is further configured to include fixing columns, with two fixing columns respectively disposed at the top ends of the left and right upper arms, the fixing columns being used to suspend and fix the powder-liquid double-chamber bag.

[0016] The invention is further configured such that when the pawl engages with the bayonet, the opening of the powder-liquid dual-chamber bag located on the conveying fixture is fully open.

[0017] The present invention also discloses a strut-type main drive system for a powder-liquid dual-chamber bag, including a frame, a guide rail, a conveyor timing belt, and a strut-type conveyor fixture for any of the above-mentioned powder-liquid dual-chamber bags. The conveyor fixture includes a sliding wheel, which is disposed on the fixture body. The sliding wheel cooperates with the guide rail and allows the conveyor fixture to slide along the guide rail. All of the conveyor fixtures are connected to the conveyor timing belt.

[0018] The invention is further configured to include a first top plate and a driving member. The first top plate is located directly below the conveying fixture. The driving member can drive the first top plate to reciprocate in the vertical direction. The upper surface of the first top plate is provided with two conical guide blocks. During the vertical upward movement of the first top plate, the two guide blocks respectively abut against the bottom ends of the left and right upper arms, and the two guide blocks are always located between the left and right upper arms.

[0019] The present invention is further configured such that: the conveying fixture includes rollers, two rollers are respectively disposed at the bottom ends of the left and right upper arms, and the rollers abut against the guide block.

[0020] The invention is further configured to include a second top plate and a driving member. The second top plate is located below the conveying fixture. The driving member can drive the second top plate to reciprocate in the vertical direction. A pressure column is provided on the upper surface of the second top plate. When the second top plate moves vertically upward, the top end of the pressure column can abut against the pressure plate and push the pressure plate vertically upward.

[0021] In summary, the beneficial effects achieved by this invention are as follows: (1) The main drive system is equipped with a first top plate and a drive unit at a specific bag opening station. The tapered guide block on the first top plate abuts against the rollers at the bottom of the conveying fixture. When the drive unit pushes the first top plate upward, the guide block moves upward and widens the distance between the left and right upper arms at the bottom of the conveying fixture, thereby reducing the distance between the left and right upper arms at the top of the conveying fixture. The powder-liquid double-chamber bag suspended and fixed on the conveying fixture is squeezed, thus opening the bag opening. This configuration enables the conveying fixture to not only fix the powder-liquid double-chamber bag but also automatically complete the opening and closing action of the bag opening. (2) The strut mechanism located between the left and right upper arms and below the main body of the fixture can extend synchronously through the relative sliding between the rod and the housing when the distance between the left and right upper arms increases. When the rod and the housing slide relative to each other, the pawl is continuously pulled outward by the rod until the pawl moves to the slot of the housing. Under the elastic force of the compression spring, one end of the pawl pops out and the pawl engages with the outer wall of the housing at the slot, so that the rod cannot retract into the housing by itself, and thus the overall length of the strut mechanism cannot be shortened. The strut mechanism completes self-locking. Even if the conveying fixture moves between different workstations, the strut mechanism directly set on the conveying fixture can keep the distance between the left and right upper arms stable, thus effectively keeping the bag opening of the powder liquid double chamber bag open. (3) The pressure plate set at the bayonet of the strut mechanism is kept in contact with the pawl through the top rod, and the pressure column set on the upper surface of the second top plate can contact the pressure plate and push the pressure plate upward when it moves upward. The top rod on the pressure plate then squeezes the pawl and causes the pawl to retract into the gap between the rod and the housing. At this time, the self-locking state of the strut mechanism is released, and the extended part of the strut mechanism retracts back into the housing under the action of the internal tension spring, thereby reducing and restoring the distance between the left and right upper arms at the bottom of the conveying fixture, and thus the distance between the left and right upper arms at the top of the conveying fixture is restored synchronously. The powder liquid double chamber bag suspended and fixed on the conveying fixture is stretched, and finally the bag mouth of the powder liquid double chamber bag is closed; (4) The opening and closing of the bag opening of the powder liquid double chamber bag can be realized by simply controlling the first and second top plates to move up and down through the drive component, combined with the conveying fixture with the added support rod mechanism. No external suction cup is required, which reduces the time of auxiliary actions and improves the overall production efficiency. (5) The mechanical self-locking structure of the strut mechanism replaces the complex pneumatic or electric holding mechanism, which not only reduces the complexity of the control system and improves the reliability and maintenance convenience of the equipment, but also makes the bag opening state of the powder-liquid double chamber bag more stable during the filling and inflation process, effectively avoiding problems such as powder leakage and uneven inflation caused by bag opening deformation, and improving the product qualification rate; moreover, the strut mechanism is directly set on the conveying fixture and moves synchronously between each station with the conveying fixture. After self-locking, it can effectively prevent the powder-liquid double chamber bag from closing or twisting and deforming during the conveying process, ensuring the quality of the powder filling and inflation process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the composition and structure of the main drive system in the background art of this invention; Figure 2 This is a schematic diagram of the structure of the powder-liquid dual-chamber bag in different states in the background art of this invention; Figure 3 This is a schematic diagram of the conveying clamp in different states in the background art of this invention; Figure 4 This is a schematic diagram of the conveying clamp in different states according to an embodiment of the present invention; Figure 5 These are schematic diagrams of the strut mechanism in different states in embodiments of the present invention; Figure 6This is a schematic diagram of the composition structure of the main drive system in an embodiment of the present invention; Figure 7 for Figure 6 Enlarged view of part A in the middle; Figure 8 for Figure 6 A magnified view of part B in the middle.

[0024] In the diagram: 1. Powder / liquid dual-chamber bag; 11. Pipe opening; 12. Bag opening; 13. Separator strip; 2. Frame; 21. Bag loading station; 22. Bag cleaning station; 23. Bag cutting station; 24. Bag opening station; 25. Packaging station; 26. Inflating station; 27. Welding station; 28. Bag unloading station; 3. Guide rail; 4. Conveyor timing belt; 5. Conveyor clamp; 51. Left boom; 52. Right boom; 53. Clamp 54. Main body; 55. Sliding wheel; 56. Fixed column; 57. Roller; 68. Hinge column; 69. Support mechanism; 60. Housing; 611. Bayonet; 62. Rod; 621. Sliding block; 63. Mounting block; 64. Tension spring; 65. Pawl; 66. Compression spring; 67. Pressure plate; 671. Top rod; 672. Torsion spring; 70. First top plate; 71. Guide block; 81. Second top plate; 82. Pressure column; 9. Driving component. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. For ease of explanation, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0027] As attached Figure 4 and attached Figure 5 As shown, a strut-type conveying fixture for a powder-liquid dual-chamber bag includes a fixture body 53, a left upper arm 51, a right upper arm 52, a fixed column 55, a sliding wheel 54, and a hinged column 57.

[0028] The above-described structure of the transfer fixture 5 is all prior art. The left arm 51 and the right arm 52 are both vertical and symmetrically arranged on both sides of the fixture body 53. The left arm 51 and the right arm 52 are each hinged to the fixture body 53 at the middle position via a hinge post 57.

[0029] Two sliding wheels 54 are provided at the top and bottom of the clamp body 53. The sliding wheels 54 are fixed on the clamp body 53 and can rotate relative to the clamp body 53.

[0030] Two fixing posts 55 are respectively set at the top of the left upper arm 51 and the right upper arm 52. The fixing posts 55 can pass through the through holes on both sides of the bag opening 12 of the powder liquid double chamber bag 1, so as to hang and fix the powder liquid double chamber bag 1.

[0031] The conveyor fixture 5 also includes rollers 56 and a strut mechanism 6.

[0032] Two rollers 56 are fixed to the bottom ends of the left upper arm 51 and the right upper arm 52 respectively, and the rollers 56 can rotate relative to the left upper arm 51 and the right upper arm 52.

[0033] The strut mechanism 6 is located between the left upper arm 51 and the right upper arm 52 and below the clamp body 53. The strut mechanism 6 includes a housing 61, a strut 62, and a mounting block 63.

[0034] The shell 61 is a cylindrical structure with one end sealed and the other end open, and the diameter of the end opening is smaller than the diameter of the shell 61.

[0035] The rod 62 is a cylindrical structure, and its length direction is consistent with the length direction of the shell 61. One end of the rod 62 extends into the shell 61 and can slide back and forth inside the shell 61, while the other end of the rod 62 is always located outside the shell 61.

[0036] A mounting block 63 is provided at one end of the sealed housing 61, and a mounting block 63 is provided at one end of the rod 62 located outside the housing 61, so that the two mounting blocks 63 are located at both ends of the strut mechanism 6 along its length.

[0037] The mounting block 63 on the housing 61 is hinged to the left upper arm 51, and the mounting block 63 on the rod 62 is hinged to the right upper arm 52. In this invention, the mounting block 63 is preferably spherical, and the spherical mounting block 63 is embedded in the left upper arm 51 and the right upper arm 52. A gap is left between the housing 61 and the left upper arm 51, and between the rod 62 and the right upper arm 52, to prevent the strut mechanism 6 from interfering with the left upper arm 51 or the right upper arm 52 when it is in operation.

[0038] The strut mechanism 6 also includes a tension spring 64, a pawl 65, and a compression spring 66.

[0039] The tension spring 64 is located inside the housing 61, and its two ends are fixedly connected to one end of the housing 61 that is sealed and the sliding block 621 at the end of the rod 62 that extends into the housing 61, respectively.

[0040] The diameter of the sliding block 621 is larger than the diameter of the rod 62 and also larger than the diameter of the opening end of the housing 61. The sliding block 621 is used to prevent the rod 62 from being completely pulled out of the housing 61 and to facilitate the connection and fixation of the tension spring 64 to the rod 62.

[0041] When the strut mechanism 6 is subjected to external tension, and the strut 62 is pulled out of the housing 61, the tension spring 64 elongates and undergoes elastic deformation, so that the tension spring 64 can pull the strut 62 back into the housing 61 after the external tension disappears.

[0042] The pawl 65 has a fan-shaped, plate-like structure and a certain degree of curvature. The pawl 65 is located within the gap between the housing 61 and the rod 62, at the bottom of the rod 62. The end of the pawl 65 furthest from the tension spring 64 is hinged and fixed to the rod 62, and the pawl 65 can fit snugly against the side wall of the rod 62.

[0043] A compression spring 66 is disposed between the pawl 65 and the rod 62, and both ends of the compression spring 66 are fixedly connected to the inner wall of the pawl 65 and the side wall of the rod 62, respectively. Under the elastic force of the compression spring 66, the side of the pawl 65 facing away from the compression spring 66 is always in contact with the inner wall of the housing 61.

[0044] A long, narrow slot 611 is provided on the side wall of the housing 61 near the opening end of the housing 61. The slot 611 is located at the bottom of the housing 61 and its position corresponds to the pawl 65.

[0045] The latch 611 is used to engage with the pawl 65. Specifically, when the strut mechanism 6 is subjected to external tension, as the strut 62 is pulled out of the housing 61, the pawl 65 moves synchronously away from the tension spring 64 along with the strut 62. When the pawl 65 moves to the latch 611 position, the pawl 65 is instantly ejected from the latch 611 under the action of the compression spring 66, and the pawl 65 engages with the latch 611. At this time, the strut 62 can still continue to move outward, but cannot retract into the housing 61.

[0046] Since the powder-liquid dual-chamber bag 1 is suspended and fixed at the top of the left upper arm 51 and the right upper arm 52, and the strut mechanism 6 is located at the lower part of the left upper arm 51 and the right upper arm 52, the bag opening 12 of the powder-liquid dual-chamber bag 1 located on the conveying fixture 5 can be fully opened when the pawl 65 and the pawl 611 are engaged.

[0047] The strut mechanism 6 also includes a pressure plate 67 located at the bayonet 611.

[0048] One end of the pressure plate 67 is hinged to the housing 61, and a torsion spring 672 is also provided between the pressure plate 67 and the housing 61.

[0049] A push rod 671 is provided on the side of the pressure plate 67 facing the rod 62. Under the action of the torsion spring 672, the push rod 671 on the pressure plate 67 abuts against the rod 62 in its natural state, and the push rod 671 abuts against the pawl 65 when the pawl 65 is engaged with the bayonet 611.

[0050] As attached Figure 6-8 As shown, the present invention also discloses a strut-type main drive system for a powder-liquid dual-chamber bag, including a frame 2, a guide rail 3, a conveyor timing belt 4, and a conveyor clamp 5.

[0051] The frame 2, guide rail 3, and conveyor timing belt 4 in the main drive system are all existing technologies. The frame 2 is the supporting skeleton of the entire system, and is made of stainless steel profiles welded or assembled, which has good structural strength and corrosion resistance.

[0052] The guide rail 3 is mounted on the frame 2, and the sliding wheel 54 on the conveyor fixture 5 cooperates with the guide rail 3 so that the conveyor fixture 5 can slide along the guide rail 3.

[0053] On the other side of the frame 2, there is a conveyor belt 4. All conveyor clamps 5 are connected to the conveyor belt 4. The conveyor belt 4 is preferably an annular belt. Under the drive of the drive device, the conveyor clamps 5 can circulate inside the equipment.

[0054] Above the frame 2 are arranged sequentially the following stations: bag loading station 21, bag washing station 22, bag cutting station 23, bag opening station 24, bag dispensing station 25, air filling station 26, welding station 27, and bag unloading station 28. These stations are arranged sequentially along the conveying direction of the synchronous conveyor belt 4, and the conveying fixture 5 moves sequentially between the stations, thus completing the automated production of the powder-liquid dual-chamber bag 1.

[0055] The main drive system also includes a first top plate 7, a second top plate 8, and a drive component 9.

[0056] The first top plate 7 is located at the bag opening station 24 and directly below the conveying fixture 5. The first top plate 7 is a horizontally arranged flat plate structure, and two conical guide blocks 71 are spaced apart on the upper surface of the first top plate 7.

[0057] The drive unit 9 can drive the first top plate 7 to reciprocate vertically. In this embodiment, the drive unit 9 is an AC servo motor, which is connected to the PLC of the control system through a servo driver, thereby realizing precise position control and speed control.

[0058] During the vertical upward movement of the first top plate 7, the sidewalls of the two guide blocks 71 abut against the rollers 56 at the bottom ends of the left and right upper arms 51 and 52, respectively, and the two guide blocks 71 are always positioned between the left and right upper arms 51 and 52. Guided by the tapered guide blocks 71, the distance between the bottom ends of the left and right upper arms 51 and 52 gradually increases. Correspondingly, the strut mechanism 6 between the left and right upper arms 51 and 52 is also stretched, while the distance between the top ends of the left and right upper arms 51 and 52 gradually decreases.

[0059] The second top plate 8 is located at the inflation station 26 and below the conveying clamp 5. The second top plate 8 is a horizontally arranged flat plate structure. The upper surface of the second top plate 8 is provided with a pressure column 81 perpendicular to the second top plate 8. The pressure column 81 is located directly below the pressure plate 67 on the conveying clamp 5 at the inflation station 26.

[0060] The driving component 9 can also drive the second top plate 8 to move back and forth in the vertical direction. When the second top plate 8 moves vertically upward, the top of the pressure column 81 can abut against the pressure plate 67 and push the pressure plate 67 vertically upward.

[0061] The implementation process of the above embodiments is as follows: At the bagging station 21, the operator or the automatic bagging device suspends the powder-liquid double-chamber bag 1 on the top of the conveying fixture 5; at this time, the left arm 51 and the right arm 52 on the conveying fixture 5 are in the initial position, both of which are in a vertical state, and the bag opening 12 of the powder-liquid double-chamber bag 1 on the conveying fixture 5 is also in a closed state.

[0062] As the synchronous belt 4 in the main drive system moves, the conveyor fixture 5 moves along the guide rail 3 from the upper bag station 21 to the downstream station. During this process, the bag opening 12 of the powder-liquid double-chamber bag 1 on the conveyor fixture 5 remains closed.

[0063] When the conveyor clamp 5 reaches the bag opening station, the drive unit 9 starts and pushes the first top plate 7 upward. As the first top plate 7 moves upward, the guide block 71 moves upward as well, widening the distance between the left and right upper arms 51 and 52 at the bottom of the conveyor clamp 5. This, in turn, narrows the distance between the left and right upper arms 51 and 52 at the top of the conveyor clamp 5, squeezing the powder-liquid double-chamber bag 1 suspended on the conveyor clamp 5, thus opening the bag opening 12. During this process, the strut mechanism 6 is pulled by tension, and the strut 62 gradually extends out of the housing 61. When the opening angle of the top of the conveyor clamp 5 reaches the standard bag opening width, the pawl 65 engages in the latch 611, completing the automatic locking of the strut mechanism 6. Then, the drive unit 9 drives the first top plate 7 downward to reset.

[0064] The conveyor clamp 5 continues to move along the guide rail 3 to the dispensing station 25. At the dispensing station 25, the powder dispensing device fills the bag with powder through the bag opening 12. Because the support rod mechanism 6 is in a self-locking state, the conveyor clamp 5 can stably maintain the bag opening angle without the aid of other mechanisms, and the bag opening 12 remains stably open, ensuring smooth powder filling. At the same time, it prevents the bag opening 12 from closing or twisting and deforming during the conveying process.

[0065] The conveyor clamp 5 continues to move along the guide rail 3 to the inflation station 26. At the inflation station 26, the inflation device fills the bag with a protective gas (such as nitrogen). The conveyor clamp 5 maintains the same open bag state as the dispensing station 25 at the inflation station 26, with the bag opening 12 stably open to ensure the inflation effect. After the inflation process is completed, the drive unit 9 starts again and pushes the second top plate 8 upward. As the second top plate 8 moves upward, the pressure column 81 moves upward and gradually contacts and pushes the pressure plate 67. After the pressure plate 67 is under force, the push rod 671 on the pressure plate 67 squeezes the pawl 65 and causes the pawl 65 to retract into the gap between the rod body 62 and the housing 61. At this time, the self-locking state of the strut mechanism 6 is released. Under the action of the internal tension spring 64, the extended part of the strut 62 retracts back into the housing 61, thereby reducing and restoring the distance between the left upper arm 51 and the right upper arm 52 at the bottom of the conveying clamp 5. Consequently, the distance between the left upper arm 51 and the right upper arm 52 at the top of the conveying clamp 5 is restored synchronously. The powder-liquid double-chamber bag 1 suspended and fixed on the conveying clamp 5 is stretched, ultimately closing the bag opening 12 of the powder-liquid double-chamber bag 1. After the drive component 9 reaches its stroke limit, it drives the second top plate 8 to move down and reset.

[0066] The conveyor clamp 5 continues to move along the guide rail 3 to the sealing station. At the sealing station, the sealing device heat-seals the bag opening 12. After sealing, the conveyor clamp 5 continues to move to the lower bag station 28, where the powder-liquid double-chamber bag 1 is removed from the conveyor clamp 5 and enters the next process. The empty conveyor clamp 5 returns to the upper bag station 21 via the circular loop of the synchronous conveyor belt 4 to begin the next work cycle.

[0067] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims and their equivalents, the invention is also intended to include these modifications and modifications.

Claims

1. A strut-type conveying clamp for a powder-liquid double-chamber bag, comprising a clamp body (53), a left upper arm (51), and a right upper arm (52), wherein the left upper arm (51) and the right upper arm (52) are symmetrically arranged and both are hinged to the clamp body (53), characterized in that, It also includes a strut mechanism (6), which is located between the left upper arm (51) and the right upper arm (52) and below the clamp body (53). The strut mechanism (6) includes a housing (61), a rod (62), a tension spring (64), a pawl (65), and a compression spring (66). One end of the rod (62) extends into the housing (61) and can slide back and forth inside the housing (61). The tension spring (64) is located inside the housing (61), and both ends of the tension spring (64) are respectively connected to the housing. The body (61) and the rod (62) are fixedly connected at one end of the shell (61). The pawl (65) is located in the gap between the shell (61) and the rod (62), and the end of the pawl (65) away from the tension spring (64) is hinged and fixed to the rod (62). The compression spring (66) is located between the pawl (65) and the rod (62). A bayonet (611) is provided on the end of the shell (61) near the rod (62), and the bayonet (611) is used to engage with the pawl (65).

2. The strut-type conveying clamp for the powder-liquid dual-chamber bag according to claim 1, characterized in that, The strut mechanism (6) further includes a pressure plate (67), on which a top rod (671) and a torsion spring (672) are provided. The pressure plate (67) is located at the bayonet (611). One end of the pressure plate (67) is hinged to the housing (61) through the torsion spring (672). The top rod (671) is fixed on the side of the pressure plate (67) facing the rod body (62). When the pawl (65) is engaged with the bayonet (611), the top rod (671) abuts against the pawl (65).

3. The strut-type conveying fixture for the powder-liquid dual-chamber bag according to claim 1, characterized in that, The strut mechanism (6) also includes mounting blocks (63), two mounting blocks (63) are fixed on the housing (61) and the rod (62) respectively and are located at both ends of the strut mechanism (6), and the two mounting blocks (63) are hinged to the left upper arm (51) and the right upper arm (52) respectively.

4. The strut-type conveying clamp for the powder-liquid dual-chamber bag according to claim 3, characterized in that, The mounting block (63) is spherical and there are gaps between the strut mechanism (6) and the left upper arm (51) and the right upper arm (52).

5. The strut-type conveying clamp for the powder-liquid dual-chamber bag according to claim 1, characterized in that, It also includes fixing posts (55), two of which are respectively set at the top of the left upper arm (51) and the right upper arm (52), and the fixing posts (55) are used to suspend and fix the powder liquid double chamber bag (1).

6. The strut-type conveying clamp for a powder-liquid dual-chamber bag according to claim 1 or 5, characterized in that, When the pawl (65) engages with the bayonet (611), the bag opening (12) of the powder liquid double chamber bag (1) located on the conveying clamp (5) is fully opened.

7. A strut-type main drive system for a powder-liquid dual-chamber bag, comprising a frame (2), a guide rail (3), and a conveyor timing belt (4), characterized in that, It also includes a strut-type conveyor clamp for a powder-liquid dual-chamber bag as described in any one of claims 1-6, wherein the conveyor clamp (5) includes a sliding wheel (54), the sliding wheel (54) is disposed on the clamp body (53), the sliding wheel (54) cooperates with the guide rail (3) and allows the conveyor clamp (5) to slide along the guide rail (3), and all the conveyor clamps (5) are connected to the conveyor timing belt (4).

8. The strut-type main drive system for a powder-liquid dual-chamber bag according to claim 7, characterized in that, It also includes a first top plate (7) and a drive member (9). The first top plate (7) is located directly below the conveying fixture (5). The drive member (9) can drive the first top plate (7) to move back and forth in the vertical direction. The upper surface of the first top plate (7) is provided with two conical guide blocks (71). During the vertical upward movement of the first top plate (7), the two guide blocks (71) respectively abut against the bottom ends of the left upper arm (51) and the right upper arm (52), and the two guide blocks (71) are always located between the left upper arm (51) and the right upper arm (52).

9. The strut-type main drive system for a powder-liquid dual-chamber bag according to claim 8, characterized in that, The conveying fixture (5) includes rollers (56), and two rollers (56) are respectively disposed at the bottom ends of the left upper arm (51) and the right upper arm (52), and the rollers (56) abut against the guide block (71).

10. The strut-type main drive system for a powder-liquid dual-chamber bag according to any one of claims 7-9, characterized in that, It also includes a second top plate (8) and a driving member (9). The second top plate (8) is located below the conveying fixture (5). The driving member (9) can drive the second top plate (8) to move back and forth in the vertical direction. The upper surface of the second top plate (8) is provided with a pressure column (81). When the second top plate (8) moves vertically upward, the top of the pressure column (81) can abut against the pressure plate (67) and push the pressure plate (67) vertically upward.

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