Liquid bag automatic filling and heat sealing machine and operation method thereof

Abstract

The application discloses a kind of liquid bag automatic filling heat sealing machine and its operating method, including rack;Liquid inlet device, including liquid inlet pipe, setting on the filling mechanism and exhaust mechanism of rack, filling mechanism is connected with the liquid inlet end of liquid inlet pipe, exhaust mechanism is connected with the liquid suction end of liquid inlet pipe, liquid inlet pipe is equipped with the clamping stop component of pressing liquid inlet pipe;Heat sealing device, including with the branch pipe of liquid inlet pipe connection, liquid level sensor and for heat sealing branch pipe end heat sealing component, the liquid inlet end of branch pipe is located between two adjacent clamping stop components.This scheme reduces the contact of liquid bag and external air during filling process, reduces the pollution to blood in liquid bag;Exhaust mechanism is used to exhaust liquid in liquid bag, reduce the injection of air in liquid bag, prevent that there is obvious bubble after liquid bag filling, cause bubble damage to save the cell liquid after freezing;Multiple heat sealing devices are in parallel, when one bag is exhausted and heat sealed, the next bag is filled simultaneously.Improve filling heat sealing efficiency, and the degree of automation is higher.

Description

Technical Field

[0001] This invention relates to the field of liquid bag filling technology, and in particular to an automatic liquid bag filling and heat sealing machine and its operating method. Background Technology

[0002] In the current medical industry, the filling of cryopreservation bags and blood bags is mostly done manually, one by one, with each bag filled and heat-sealed. The existing filling and heat-sealing methods have the following problems: (1) They require a high level of operating environment and must be carried out in a sterile environment; (2) Air is easily injected during the filling process, resulting in obvious air bubbles after the soft bags are filled. When the soft bags are subsequently frozen for preservation, the frozen air bubbles will damage the preserved cell fluid; (3) The degree of automation is low and the filling efficiency is not high.

[0003] For example, Chinese Patent Publication No. CN214085028U, published on August 31, 2021, entitled "A Split-Type Automatic Inflatable Liquid Bag Filling Machine," includes a base and a ton bag. Support legs are fixed to the bottom of the base, and a motor, support column, air tank, and fixing frame are respectively installed on the top of the base. A groove is opened on one side of the motor support column, and a threaded rod is connected to the output end of the motor. This utility model, by setting up support rods and hanging ears, allows the user to hang the hanging ears on the support rods when filling. Simultaneously, an air pump operates, delivering gas from the air tank to the ton bag through an air delivery pipe, causing the ton bag to expand and facilitating subsequent filling of raw materials. When the ton bag is being filled, the increased weight causes the hanging ears to press down on the support rods, causing the fixing rod to compress the spring. This allows the ton bag to remain upright during filling through adjustable height, and the hanging ears are easily removed after filling.

[0004] The disadvantages of the existing patent are: (1) the existing soft bag filling heat sealing has high requirements for the operating environment; (2) air is easily injected during the filling process, resulting in obvious air bubbles after the soft bag is filled, and the air bubbles after freezing will damage the preserved cell fluid. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of high requirements for the operating environment of existing soft bag filling and heat sealing, and the easy injection of air during the filling process, resulting in obvious air bubbles after soft bag filling. These air bubbles, after freezing, will damage the preserved cell liquid. The invention provides an automatic liquid bag filling and heat sealing machine and its operating method, which has good sealing performance during filling and heat sealing, has an exhaust function, and improves filling and heat sealing efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic liquid bag filling and heat sealing machine includes: frame; The liquid inlet device includes a liquid inlet pipe, a filling mechanism and an exhaust mechanism mounted on the frame. The filling mechanism is connected to the liquid inlet end of the liquid inlet pipe, and the exhaust mechanism is connected to the liquid suction end of the liquid inlet pipe. The liquid inlet pipe is provided with a clamping assembly to press the liquid inlet pipe. The heat-sealing device includes a branch pipe connected to the liquid inlet pipe, a liquid sensor, and a heat-sealing assembly for sealing the end of the branch pipe. The liquid inlet end of the branch pipe is located between two adjacent clamping assemblies. This automatic liquid bag filling and heat-sealing machine is commonly used in the medical industry for filling cryopreservation bags or blood bags. It reduces the contact between the liquid bag and outside air during the filling process, directly filling and heat-sealing, with low requirements for the operating environment, and reduces contamination of the blood inside the liquid bag. The cryopreservation bag or blood bag is equipped with a branch pipe, which is connected to or integrated with the branch pipe of the liquid inlet pipe, depending on the actual needs of the liquid bag. An exhaust mechanism is used to draw air from the liquid inside the bag, reducing the injection of air and preventing significant air bubbles after filling the soft bag. This prevents air bubbles from damaging the preserved cell fluid during subsequent freezing of the soft bag. This solution has a high degree of automation, improving filling and heat-sealing efficiency and accuracy.

[0007] When liquid flows through the liquid sensor, a signal is sent. When the filling mechanism is running, the liquid sensor detects the liquid and sends a signal. The total number of revolutions of the filling mechanism is controlled by the target filling volume and the filling volume per revolution of the filling mechanism. When the venting mechanism is running, a signal is sent when liquid flows through the liquid sensor, controlling the heat sealing component and the heat sealing actuator to perform pipeline heat sealing to prevent liquid backflow.

[0008] Preferably, the heat sealing device further includes a clamping block for holding the branch pipe, the clamping block being mounted on the frame. The clamping block is used to hold the branch pipe to prevent it from vibrating and generating air bubbles or foam during the filling process.

[0009] Preferably, the heat-sealing assembly includes a clamping assembly for pressing the lower part of the branch pipe and a heat-sealing actuator for heat-sealing the lower part of the branch pipe. The heat-sealing actuator uses a heat-sealing machine to heat-seal the end of the branch pipe.

[0010] Preferably, the clamping assembly includes a first pressure plate mounted on a frame, a second pressure plate for pressing the inlet pipe against the first pressure plate, and a clamping actuator for driving the second pressure plate to clamp. The inlet pipe passes between the first and second pressure plates, and the second pressure plate is located at the output end of the output shaft of the clamping actuator. The first pressure plate has a guide groove, and the inlet pipe is located within the guide groove. The second pressure plate presses the inlet pipe against the guide groove. The guide groove limits the inlet pipe to its position on the first pressure plate.

[0011] Preferably, the clamping assembly includes a third pressure plate mounted on the frame, a hook for clamping the branch pipe onto the third pressure plate, and a clamping actuator for driving the hook to clamp. The branch pipe passes between the third pressure plate and the hook, and the hook is located at the output end of the output shaft of the clamping actuator. The clamping assembly, clamping assembly, heat sealing actuator, and liquid sensor are operated by system control.

[0012] Preferably, the third pressure plate is provided with a retaining groove, which limits the branch pipe to the third pressure plate. The retaining groove is used to limit the branch pipe.

[0013] Preferably, the heat-sealing device comprises multiple units, with branch pipes within each unit sequentially distributed along the liquid inlet pipe's conveying direction. Clamping assemblies are located between the liquid inlet mechanism and the liquid inlet end of the branch pipe adjacent to the liquid inlet mechanism, between the liquid inlet ends of two adjacent branch pipes, and between the venting mechanism and the liquid inlet end of the branch pipe adjacent to the venting mechanism. Multiple heat-sealing devices are connected in parallel, allowing the next bag to be filled simultaneously while the previous bag is being heat-sealed for venting. This improves filling and heat-sealing efficiency and achieves a high degree of automation.

[0014] Preferably, the liquid sensor, clamping assembly, and heat-sealing actuator are sequentially distributed at the lower part of the branch pipe along the conveying direction of the branch pipe. The clamping assembly is located between the liquid sensor and the heat-sealing actuator to prevent air from being heat-sealed into the liquid bag during heat sealing.

[0015] An operating method for an automatic liquid bag filling and heat sealing machine, used in any one of the above-mentioned automatic liquid bag filling and heat sealing machines, includes the following steps in sequence: Step 1: In the initial state, drive the clamping assembly to clamp the branch tube and fully open the inlet tube. At this time, connect the cryopreservation bag to the outlet end of the branch tube. Step 2: Drive the clamping component away from the filling mechanism to clamp, disconnect the pipeline between the heat sealing device to be filled and the exhaust mechanism, drive the pressing mechanism in the heat sealing device to be filled to open, and fill the liquid bag in the heat sealing device to be filled with liquid through the filling mechanism. Step 3: The liquid sensor in the corresponding heat-sealing device to be filled detects the liquid in the branch pipe and transmits a signal to calculate the specific filling volume. When the target filling volume is reached, the filling mechanism stops. Step 4: Drive the clamping component near the filling mechanism to clamp, disconnect the pipeline between the heat sealing device to be filled and the filling mechanism, drive the clamping component away from the filling mechanism to open, open the pipeline between the heat sealing device to be filled and the venting mechanism, and vent the liquid bag in the heat sealing device to be filled through the venting mechanism. Step 5: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe and transmits a signal, controlling the clamping mechanism in the heat sealing device to be filled to a clamping state, blocking the backflow of liquid; Step 6: Close the exhaust mechanism and start the heat sealing actuator to heat seal the branch pipes inside the filled heat sealing device. Filling is now complete.

[0016] Preferably, when there are multiple heat-sealing devices, in step four, while venting the heat-sealing device to be filled, liquid is filled into the liquid bag in the adjacent heat-sealing device near the filling mechanism on the liquid inlet pipe; steps two through six are repeated to fill the liquid bags sequentially. Multiple heat-sealing devices are connected in parallel, and while venting and heat-sealing the previous bag, the next bag is filled simultaneously. This improves filling and heat-sealing efficiency and increases the degree of automation.

[0017] Therefore, the present invention has the following beneficial effects: (1) Reduce the contact between the filling point of the liquid bag and the outside air during the filling process. It is directly connected to the liquid inlet pipe through the branch pipe, filled and heat-sealed. The operating environment requirements are not high, which reduces the contamination of the blood in the liquid bag. (2) The liquid in the liquid bag is sucked out by the exhaust mechanism, which plays the role of exhausting the air, reducing the injection of air into the liquid bag, preventing obvious air bubbles after the liquid bag is filled, and preventing the air bubbles after freezing from damaging the stored cell liquid when the liquid bag is frozen for storage. (3) Multiple heat sealing devices are connected in parallel, and the next bag is filled at the same time while the previous bag is being heat sealed by exhaust. This improves the filling and heat sealing efficiency and has a high degree of automation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a structure in Embodiment 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of a structure in Embodiment 2 of the present invention.

[0020] Figure 3 This is a schematic diagram of one structure of the clamping component in this invention.

[0021] Figure 4 This is a schematic diagram of one structure of the clamping component of the present invention.

[0022] As shown in the picture: Frame 1, Liquid inlet pipe 2, Filling mechanism 3, Exhaust mechanism 4. Clamping assembly 5, first pressure plate 5.1, second pressure plate 5.2, clamping actuator 5.3, Branch pipe 6, liquid sensor 7, clamping block 8, Clamping assembly 9, third pressure plate 9.1, hook 9.2, clamping actuator 9.3, slot 9.4, Heat-sealing actuator 10, liquid bag 11. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1, as Figure 1 , Figure 3 , Figure 4 As shown, an automatic liquid bag filling and heat sealing machine includes: a frame 1; a liquid inlet device, which includes a liquid inlet pipe 2, a filling mechanism 3 and an exhaust mechanism 4 mounted on the frame 1, the filling mechanism 3 being connected to the liquid inlet end of the liquid inlet pipe 2, the exhaust mechanism 4 being connected to the liquid suction end of the liquid inlet pipe 2, and a clamping assembly 5 for pressing the liquid inlet pipe 2 on the liquid inlet pipe 2; and a heat sealing device, which includes a branch pipe 6 connected to the liquid inlet pipe 2, a liquid sensor 7 and a heat sealing assembly for heat sealing the end of the branch pipe 6, the liquid inlet end of the branch pipe 6 being located between two adjacent clamping assemblies 5.

[0025] The automatic liquid bag filling and heat sealing machine described in the above embodiments is mainly used in the medical industry for filling cryopreservation bags or blood bags. It reduces the contact between the liquid bag 11 and the outside air during the filling process. It connects to the inlet pipe 2 via a branch pipe 6, performs filling and heat sealing, and has low requirements for the operating environment, reducing contamination of the blood inside the liquid bag 11. An exhaust mechanism 4 is used to draw air from the liquid inside the liquid bag 11, effectively venting the air and reducing the injection of air into the liquid bag 11, preventing air bubbles after freezing from damaging the preserved cell fluid. This solution has a high degree of automation, improving filling and heat sealing efficiency and accuracy. When liquid flows through the liquid sensor 7, a signal is sent. When the filling mechanism 3 is running, the liquid sensor 7 detects the liquid and sends a signal. The total number of revolutions of the filling mechanism 3 is controlled by the target filling volume and the filling volume per revolution. When the exhaust mechanism 4 is running, a signal is sent when liquid flows through the liquid sensor 7, controlling the heat sealing component and the heat sealing actuator 10 to perform pipeline heat sealing, preventing liquid backflow. This invention solves the problems of high requirements for the operating environment in existing soft bag filling and heat sealing processes, as well as the easy injection of air during the filling process, which results in obvious air bubbles after soft bag filling, and the damage of the preserved cell fluid by the air bubbles after freezing.

[0026] Furthermore, such as Figure 1 As shown, the heat sealing device also includes a clamping block 8 for clamping the branch pipe 6, which is mounted on the frame 1. The clamping block 8 is used to clamp the branch pipe 6 to prevent the branch pipe 6 from vibrating and generating air bubbles or foam during the filling process.

[0027] Furthermore, such as Figure 1 As shown, the heat sealing assembly includes a clamping assembly 9 for clamping the lower part of the branch pipe 6 and a heat sealing actuator 10 for heat sealing the lower part of the branch pipe 6. The heat sealing actuator 10 uses a heat sealing machine to heat seal the end of the branch pipe 6.

[0028] Furthermore, such as Figure 4As shown, the clamping assembly 5 includes a first pressure plate 5.1 mounted on the frame 1, a second pressure plate 5.2 for pressing the inlet pipe 2 onto the first pressure plate 5.1, and a clamping actuator 5.3 for driving the second pressure plate 5.2 to clamp. The inlet pipe 2 passes between the first pressure plate 5.1 and the second pressure plate 5.2. The second pressure plate 5.2 is located at the output end of the output shaft of the clamping actuator 5.3. The first pressure plate 5.1 has a guide groove, and the inlet pipe 2 is located in the guide groove. The second pressure plate 5.2 presses the inlet pipe 2 into the guide groove. The guide groove limits the inlet pipe 2 to the first pressure plate 5.1.

[0029] Furthermore, such as Figure 3 As shown, the clamping assembly 9 includes a third pressure plate 9.1 mounted on the frame 1, a hook 9.2 for clamping the branch pipe 6 onto the third pressure plate 9.1, and a clamping actuator 9.3 for driving the hook 9.2 to clamp. The branch pipe 6 passes between the third pressure plate 9.1 and the hook 9.2, which is located at the output end of the output shaft of the clamping actuator 9.3. The clamping assembly 5, the clamping assembly 9, the heat sealing actuator 10, and the liquid sensor 7 are operated by system control. The third pressure plate 9.1 is provided with a slot 9.4, which limits the branch pipe 6 onto the third pressure plate 9.1. The slot 9.4 is used to limit the branch pipe 6.

[0030] The liquid sensor 7, the clamping assembly 9, and the heat sealing actuator 10 are sequentially distributed along the conveying direction of the branch pipe 6 at the lower part of the branch pipe 6. The clamping assembly 9 is located between the liquid sensor 7 and the heat sealing actuator 10 to prevent air from being heat-sealed into the liquid bag 11 during heat sealing. The clamping block in the heat sealing assembly is connected to the heat sealing machine, and the heat sealing machine transmits high-frequency signals through the clamping block to heat seal the pipeline.

[0031] Example 2: The basic structure is further optimized based on Example 1, such as... Figure 2 , Figure 3 , Figure 4 As shown, there are multiple heat-sealing devices. Within each heat-sealing device, branch pipes 6 are sequentially distributed along the conveying direction of the liquid inlet pipe 2. Clamping components 5 are located between the liquid inlet mechanism and the liquid inlet end of the branch pipe 6 adjacent to the liquid inlet mechanism, between the liquid inlet ends of two adjacent branch pipes 6, and between the exhaust mechanism 4 and the liquid inlet end of the branch pipe 6 adjacent to the exhaust mechanism 4. Multiple heat-sealing devices are connected in parallel, and while the previous bag is being heat-sealed after exhaust, the next bag is being filled simultaneously. This improves filling and heat-sealing efficiency and achieves a high degree of automation.

[0032] Example 3, as Figure 1 , Figure 3 , Figure 4 As shown, the operation method of an automatic liquid bag filling and heat sealing machine includes the following steps in sequence: Step 1: In the initial state, drive the clamping assembly 9 to clamp the branch tube 6 and fully open the liquid inlet tube 2. At this time, connect the cryopreservation bag to the liquid outlet end of the branch tube 6. Step 2: Drive the clamping component 5 away from the filling mechanism 3 to the clamping state, disconnect the pipeline between the heat sealing device to be filled and the exhaust mechanism 4, drive the pressing mechanism in the heat sealing device to be filled to the open state, and fill the liquid bag 11 in the heat sealing device to be filled by the filling mechanism 3. Step 3: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe 6 and transmits a signal to calculate the specific filling volume. When the target filling volume is reached, the filling mechanism 3 is stopped. Step 4: Drive the clamping component 5 near the filling mechanism 3 to clamp, disconnect the pipeline between the heat sealing device to be filled and the filling mechanism 3, drive the clamping component 5 away from the filling mechanism 3 to open, open the pipeline between the heat sealing device to be filled and the exhaust mechanism 4, and exhaust the liquid bag 11 in the heat sealing device to be filled through the exhaust mechanism 4. Step 5: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe 6 and transmits a signal to control the clamping mechanism in the heat sealing device to be filled to a clamping state, thus blocking the backflow of liquid. Step 6: Close the exhaust mechanism 4 and start the heat sealing actuator 10 to heat seal the branch pipe 6 inside the filled heat sealing device. Filling is complete.

[0033] Example 4, as Figure 2 , Figure 3 , Figure 4 As shown, the operation method of an automatic liquid bag filling and heat sealing machine includes the following steps in sequence: Step 1: In the initial state, drive the clamping assembly 9 to clamp the branch tube 6 and fully open the liquid inlet tube 2. At this time, connect the cryopreservation bag to the liquid outlet end of the branch tube 6. Step 2: Drive the clamping component 5 away from the filling mechanism 3 to the clamping state, disconnect the pipeline between the heat sealing device to be filled and the exhaust mechanism 4, drive the pressing mechanism in the heat sealing device to be filled to the open state, and fill the liquid bag 11 in the heat sealing device to be filled by the filling mechanism 3. Step 3: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe 6 and transmits a signal to calculate the specific filling volume. When the target filling volume is reached, the filling mechanism 3 is stopped. Step 4: Drive the clamping component 5 near the filling mechanism 3 to clamp, disconnect the pipeline between the heat sealing device to be filled and the filling mechanism 3, drive the clamping component 5 away from the filling mechanism 3 to open, open the pipeline between the heat sealing device to be filled and the exhaust mechanism 4, and exhaust the liquid bag 11 in the heat sealing device to be filled through the exhaust mechanism 4. Step 5: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe 6 and transmits a signal to control the clamping mechanism in the heat sealing device to be filled to a clamping state, thus blocking the backflow of liquid. Step 6: Close the exhaust mechanism 4 and start the heat sealing actuator 10 to heat seal the branch pipe 6 inside the filled heat sealing device. Filling is complete.

[0034] Step 7: While venting the heat sealing device to be filled in Step 5, liquid is filled into the liquid bag 11 in the adjacent heat sealing device near the filling mechanism 3 on the liquid inlet pipe 2; Steps 2 to 6 are repeated to fill the liquid bag 11 in sequence.

[0035] Actual operation process: for example Figure 2 As shown in the diagram, this scheme uses five-piece liquid bags 11 for filling and heat sealing. The liquid bags 11 are numbered from right to left as No. 1, No. 2, No. 3, No. 4, and No. 5. The clamping components 5 are numbered from left to right as No. 6, No. 7, No. 8, No. 9, No. 10, and No. 11. The pressing components 9 are numbered from left to right as No. 12, No. 13, No. 14, No. 15, and No. 16. Initially, clamping components 12, 13, 14, 15, and 16 are in a clamped state, while clamping components 6, 7, 8, 9, 10, and 11 are fully open. At this time, the cryopreservation bag is connected to the liquid outlet of branch pipe 6. Clamping component 11 is then driven to the clamped state, disconnecting the passage between branch pipe 6 of liquid bag 1 and the venting mechanism 4. This drives clamping mechanism 16 to the open state, allowing liquid to be filled into liquid bag 1 via filling mechanism 3. The liquid sensor corresponding to liquid bag 1 detects the liquid in branch pipe 6 and transmits a signal. The specific filling volume is calculated, and when the target filling volume is reached, the filling mechanism 3 is stopped. The clamping assembly 10 is driven into a clamping state, disconnecting the branch pipe 6 corresponding to liquid bag 1 from the filling mechanism 3. The clamping assembly 11 is driven into an open state, opening the branch pipe 6 corresponding to liquid bag 1 from the venting mechanism 4, allowing venting of liquid bag 1 through the venting mechanism 4. During the venting of liquid bag 1, similar steps are repeated to fill liquid bag 2. Multiple heat-sealing devices are connected in parallel, filling the next bag simultaneously while venting and heat-sealing the previous bag. This improves filling and heat-sealing efficiency and increases automation. Liquid bags 1, 2, 3, 4, and 5 are filled and heat-sealed sequentially from right to left, significantly improving filling and heat-sealing efficiency.

[0036] This invention offers the following advantages: it reduces contact between the filling point of the liquid bag and outside air during the filling process; it connects directly to the inlet pipe via a branch pipe for filling and heat sealing, minimizing environmental requirements and reducing contamination of the blood inside the liquid bag; the venting mechanism draws air from the liquid bag, reducing air injection and preventing noticeable air bubbles after filling, thus preventing damage to the preserved cell fluid during subsequent freezing; multiple heat sealing devices are connected in parallel, allowing the next bag to be filled while the previous bag is being vented and heat-sealed. This improves filling and heat sealing efficiency and achieves a high degree of automation.

[0037] The specific embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. All equivalent variations made in accordance with the shape and structure of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic liquid bag filling and heat sealing machine, characterized in that, include: frame; The liquid inlet device includes a liquid inlet pipe, a filling mechanism and an exhaust mechanism mounted on a frame. The filling mechanism is connected to the liquid inlet end of the liquid inlet pipe, and the exhaust mechanism is connected to the liquid suction end of the liquid inlet pipe. The liquid inlet pipe is equipped with a clamping assembly to press the liquid inlet pipe. The heat sealing device includes a branch pipe connected to the inlet pipe, a liquid sensor, and a heat sealing assembly at the end of the heat sealing branch pipe, wherein the inlet end of the branch pipe is located between two adjacent clamping assemblies. The heat sealing assembly includes a clamping assembly at the bottom of the clamping branch pipe and a heat sealing actuator at the bottom of the heat sealing branch pipe. The liquid sensor, clamping assembly and heat sealing actuator are distributed sequentially at the bottom of the branch pipe along the conveying direction of the branch pipe. The liquid sensor detects liquid and sends a signal. There are multiple heat sealing devices. The branch pipes in each heat sealing device are distributed sequentially along the conveying direction of the liquid inlet pipe. The clamping components are located between the liquid inlet mechanism and the liquid inlet end of the branch pipe adjacent to the liquid inlet mechanism, between the liquid inlet ends of two adjacent branch pipes, and between the exhaust mechanism and the liquid inlet end of the branch pipe adjacent to the exhaust mechanism.

2. The automatic liquid bag filling and heat sealing machine according to claim 1, characterized in that, The heat sealing device also includes a clamping block for holding the branch pipe, the clamping block being mounted on the frame.

3. The automatic liquid bag filling and heat sealing machine according to claim 2, characterized in that, The clamping assembly includes a first pressure plate mounted on the frame, a second pressure plate for pressing the inlet pipe onto the first pressure plate, and a clamping actuator for driving the second pressure plate to press. The inlet pipe passes between the first and second pressure plates, and the second pressure plate is located at the output end of the output shaft of the clamping actuator.

4. The automatic liquid bag filling and heat sealing machine according to claim 2, characterized in that, The clamping assembly includes a third pressure plate mounted on the frame, a hook for clamping the branch pipe onto the third pressure plate, and a clamping actuator for driving the hook to clamp, wherein the branch pipe passes between the third pressure plate and the hook.

5. The automatic liquid bag filling and heat sealing machine according to claim 4, characterized in that, The hook is located at the output end of the output shaft of the clamping actuator.

6. The automatic liquid bag filling and heat sealing machine according to claim 5, characterized in that, The third pressure plate is provided with a slot, which limits the branch pipe to the third pressure plate.

7. An operating method for an automatic liquid bag filling and heat sealing machine, used in any one of claims 1-6, characterized in that, The steps are as follows: Step 1: In the initial state, drive the clamping assembly to clamp the branch pipe and fully open the inlet pipe. At this time, connect the liquid bag to the outlet end of the branch pipe. Step 2: Drive the clamping component away from the filling mechanism to clamp, disconnect the pipeline between the heat sealing device to be filled and the exhaust mechanism, drive the pressing component in the heat sealing device to be filled to open, and fill the liquid bag in the heat sealing device to be filled with liquid through the filling mechanism. Step 3: The liquid sensor in the corresponding heat-sealing device to be filled detects the liquid in the branch pipe and transmits a signal to calculate the specific filling volume. When the target filling volume is reached, the filling mechanism stops. Step 4: Drive the clamping component near the filling mechanism to clamp, disconnect the pipeline between the heat sealing device to be filled and the filling mechanism, drive the clamping component away from the filling mechanism to open, open the pipeline between the heat sealing device to be filled and the venting mechanism, and vent the liquid bag in the heat sealing device to be filled through the venting mechanism. Step 5: The liquid sensor in the corresponding heat sealing device to be filled detects the liquid in the branch pipe and transmits a signal, controlling the clamping component in the heat sealing device to be filled to be in a clamping state, blocking the backflow of liquid; Step 6: Close the exhaust mechanism and start the heat sealing actuator to heat seal the branch pipes inside the filled heat sealing device. Filling is now complete.

8. The operation method of the automatic liquid bag filling and heat sealing machine according to claim 7, characterized in that, When there are multiple heat sealing devices, in step four, while venting the heat sealing device to be filled, liquid is filled into the liquid bag in the adjacent heat sealing device near the filling mechanism on the liquid inlet pipe; repeat steps two to six to fill the liquid bag in sequence.

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