Airflow type valve port packaging machine

Abstract

The utility model discloses an air flow type valve port packaging machine which comprises a machine frame and an air supply pressurization material bin fixedly installed on the top of the machine frame, the lower end of the air supply pressurization material bin extends into the machine frame and is communicated with a discharging device, and a flow aiding ring is coaxially and fixedly installed on the upper portion of an inner cavity of the air supply pressurization material bin. The flow aiding ring is communicated with an external compressed air source and is provided with an air hole for spraying towards an inner cavity of the air conveying pressurizing stock bin, a dust cover is coaxially arranged outside the discharging device in a clearance covering mode, a vent hole is formed in the overlapping area of the dust cover and the discharging device, a dust suction pipe communicated with external negative pressure equipment is arranged on the dust cover, and the vent hole is covered with a vent plate. And micropores of which the aperture is smaller than the particle size of material particles are fully distributed on the ventilation plate. According to the pressure stock bin, the fluidity of materials in the pressure stock bin can be effectively improved, the gas emission efficiency is improved, the packaging process is ensured to be smoothly carried out, and the packaging efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging machines, and in particular to an airflow valve-type packaging machine. Background Technology

[0002] In the packaging process of airflow valve bags, due to the need for material filling, gas compression, and bag sealing, coupled with the varying characteristics of different materials, materials with poor flowability cannot enter the bag in time during packaging, often resulting in excess gas inside the bag. If this gas is not effectively discharged in a timely manner, it will not only affect the packaging effect but may also cause the bag to bulge, seal poorly, and easily lead to material leakage and stack deformation during transportation and storage. Currently, although valve bag packaging units on the market have basic packaging functions, they still have shortcomings in terms of exhaust, and often exhibit low efficiency for some materials with poor flowability, failing to meet the needs of high-efficiency packaging. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an airflow valve-type packaging machine that can effectively improve the material flow in the pressure hopper, increase gas emission efficiency, ensure the smooth progress of the packaging process, and improve packaging efficiency.

[0004] The technical solution to achieve the purpose of this utility model is:

[0005] An airflow valve-type packaging machine includes a frame, an air-feeding pressurized hopper fixedly mounted on the top of the frame, the lower end of the air-feeding pressurized hopper extending into the frame and connected to a discharge device, a flow aid ring coaxially fixedly mounted on the upper part of the inner cavity of the air-feeding pressurized hopper, the flow aid ring being connected to an external compressed air source and having air holes for spraying towards the inner cavity of the air-feeding pressurized hopper, a dust cover coaxially spaced around the discharge device, and ventilation holes opened in the overlapping area with the dust cover, a dust suction pipe connected to an external negative pressure device on the dust cover, and a ventilation plate covering the ventilation holes, the ventilation plate being fully covered with micropores with a pore size smaller than the particle size of the material.

[0006] Furthermore, the pneumatic pressurized hopper includes a feed pipe, a loading hopper, an intermediate hopper, and a unloading hopper arranged sequentially from top to bottom. The feed pipe is equipped with a pneumatic clamp-type butterfly valve in the middle, which is suitable for controlling the opening and closing of the pneumatic pressurized hopper. The flow aid ring is fixed to the inner wall of the loading hopper. The discharge device is connected to the unloading hopper. The outer circumference of both the intermediate hopper and the unloading hopper is provided with an exhaust assembly that connects to the inner cavity. The exhaust assembly is connected to an external negative pressure device.

[0007] Furthermore, the flow-aiding ring includes an outer ring and an inner upper ring and an inner lower ring disposed on the inner wall of the outer ring. The outer ring is provided with an air inlet. The top of the inner upper ring is sealed to the top of the outer ring, and the bottom is inclined toward the axis of the outer ring and sealed to the top of the inner lower ring. The bottom of the inner lower ring is connected to the bottom of the outer ring and is provided with a notch evenly distributed around the circumference. The notch and the outer ring form the air hole.

[0008] Furthermore, a level gauge is installed on the upper part of the intermediate silo.

[0009] Furthermore, the discharge device includes a flexible clamp tube and a discharge tube arranged sequentially along the discharge direction. The dust cover is installed at one end of the discharge tube near the flexible clamp tube. A bag-supporting airbag is sleeved on the other end of the discharge tube. A pressure ring is sleeved on the discharge tube at the end of the bag-supporting airbag away from the outlet. A bag-blocking plate is fixedly installed on the outer circumference of the pressure ring. A sensing position is provided on the top. A liftable detection pressure head is suspended above the sensing position.

[0010] Furthermore, the outlet of the discharge pipe is provided with a downwardly inclined oblique discharge nozzle.

[0011] Furthermore, the inner wall of the discharge pipe is provided with a flow aid pipe extending along the length direction. One end of the flow aid pipe is directly opposite the outlet of the discharge pipe, and the other end is sealed and passed through the side wall of the discharge pipe and connected to external compressed air.

[0012] Furthermore, a mounting base is fixedly installed inside the frame, and a scissor valve sleeved on the mounting base is fixedly installed on the mounting base. The scissor valve is adapted to control the connection and closure of the discharge device and the pneumatic pressurized hopper by clamping and releasing the soft clamp tube.

[0013] Furthermore, the scissor valve includes a first cylinder fixedly mounted on the top of the mounting base. The piston rod of the first cylinder is vertically downward and hinged to a pair of connecting rods. The lower ends of the connecting rods are respectively hinged to scissor frames. The two scissor frames are arranged opposite each other and rotatably mounted on the side wall of the mounting base through the same connecting shaft in the middle. The inner side of the lower end of each frame is fixedly fitted with a clamping plate.

[0014] Furthermore, it also includes an ultrasonic sealing machine and a bag transfer device respectively located above and below the discharge device.

[0015] Furthermore, the ultrasonic sealing machine includes a bracket fixedly mounted on a frame. A support arm is rotatably connected to the lower end of the bracket, and a second cylinder is provided at the upper end. The cylinder body of the second cylinder is hinged to the bracket, and the piston rod is hinged to the middle of the support arm. A support is rotatably mounted at the other end of the support arm. An ultrasonic plastic welding machine is fixedly mounted on the top of the support, and a bracket is rotatably provided at the bottom. A third cylinder with its cylinder body hinged to the support is symmetrically provided on both sides of the ultrasonic plastic welding machine, and the piston rod of the third cylinder is hinged to the bracket.

[0016] Furthermore, the bag-transferring device includes a weighing frame suspended within the frame. A tilting frame is rotatably connected to the bottom of one side of the weighing frame, and cylinder seats are symmetrically and vertically fixed to the middle of the other side. A fourth cylinder is hinged to two of the cylinder seats. The piston rods of the two third cylinders are respectively hinged to the middle of the two sides of the tilting frame. A bag-transferring frame is hinged to the other end of the tilting frame. A screw jack is fixed to the bottom of the bag-transferring frame. A slider seat is fixed to the moving end of the screw jack. A support plate is rotatably provided on the front of the slider seat via a rotating shaft, and a swing cylinder is fixed to the back. The moving end of the swing cylinder is connected to the rotating shaft via a connecting rod assembly.

[0017] Furthermore, a first dust removal hopper and a second dust removal hopper are respectively provided below the discharge device and the pneumatic pressurized hopper, and the first dust removal hopper and the second dust removal hopper are respectively connected to an external negative pressure device through pipes.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects:

[0019] (1) This utility model adds a flow aid ring with air holes to the pneumatic pressurized hopper, which continuously impacts the material with airflow, reduces the friction between the material and the inner wall of the hopper, improves the flowability of the material, and thus ensures the stability of the material supply. A ventilation plate is added to the discharge device, which discharges the gas mixed with the material and the gas entering the valve bag through the suction of the negative pressure device, thereby increasing the gas discharge efficiency. The two sets of structures work together to ensure the smooth progress of the packaging process and improve the overall packaging efficiency.

[0020] (2) This utility model adopts a segmented silo structure, which facilitates transportation and avoids large-volume components. At the same time, exhaust components connected to negative pressure equipment are provided in both the intermediate silo and the lower silo. These components work together with the flow aid ring in the upper silo to form a more efficient pneumatic material flow channel, further improving the material flowability and feeding speed.

[0021] (3) The flow aid ring of this utility model forms an annular channel through an outer ring, an inner upper ring and an inner lower ring. The top is formed by the inner upper ring to form a smooth slope, which avoids interfering with the flow of materials and reduces the probability of material residue on the top of the flow aid ring. In addition, the bottom is formed by a notch and the outer ring to form air holes. The structure is simple and easy to process. The air holes are evenly arranged along the circumference to ensure that the inner wall of the hopper can be blown, thereby improving the uniformity of air delivery.

[0022] (4) This utility model monitors the amount of material in the silo by setting a level gauge, which facilitates automatic control of packaging operations.

[0023] (5) This utility model seals the opening of the valve bag to be filled by inflating the bag-supporting airbag, and limits the bag-covering depth by the bag-blocking plate on the pressure ring. It detects whether the valve bag is installed in place by pressing down the pressure head.

[0024] (6) By setting an angled discharge nozzle, this utility model can facilitate the fitting of valve bags without affecting the discharge speed.

[0025] (7) This utility model further improves the discharge speed by adding a flow aid pipe.

[0026] (8) This utility model controls the opening and closing of the discharge device through a scissor valve, which has a simple structure and a rapid action response.

[0027] (9) This utility model automatically separates the filled valve bag from the discharge device through the bag transfer device, and automatically seals the bag opening through the ultrasonic sealing machine, saving manual operation, improving packaging efficiency, and avoiding material leakage during the transfer process.

[0028] (10) By setting up multiple dust collection hoppers, this utility model can promptly discharge spilled materials, keep the packaging environment clean, avoid leakage of dusty materials, and protect the health and safety of workshop operators. Attached Figure Description

[0029] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0030] Figure 1 This is a view of the exterior of the present utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the flow-aiding ring of this utility model;

[0033] Figure 4 This is a schematic diagram of the material discharge device of this utility model;

[0034] Figure 5 This is a partial structural cross-sectional view of the discharge device of this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the ultrasonic sealing machine of this utility model;

[0036] Figure 7 This is a schematic diagram of the bag transfer device of this utility model.

[0037] The labels in the attached diagram are:

[0038] Frame 1, Pneumatic pressurized hopper 2, Feed pipe 2-1, Loading hopper 2-2, Intermediate hopper 2-3, Discharging hopper 2-4, Butterfly valve 2-5, Flow aid ring 2-6, Outer ring 2-6-1, Inner upper ring 2-6-2, Inner lower ring 2-6-3, Air inlet 2-6-4, Notch 2-6-5, Exhaust assembly 2-7, Discharge device 3, Flexible clamp pipe 3-1, Discharge pipe 3-2, Dust cover 3-3, Bag support airbag 3-4, Pressure ring 3-5, Bag baffle 3-6, Ventilation plate 3-7, Sensing position 3-8, Detection pressure head 3-9, Slanted discharge nozzle 3-10, Flow aid pipe 3-11 4. Ultrasonic sealing machine, 4-1 bracket, 4-2 support arm, 4-3 second cylinder, 4-4 support, 4-5 ultrasonic plastic welding machine, 4-6 bracket, 4-7 third cylinder, 5 bag transfer device, 5-1 weighing rack, 5-2 flipping rack, 5-3 cylinder seat, 5-4 fourth cylinder, 5-5 bag transfer rack, 5-6 screw jack, 5-7 slider seat, 5-8 pallet, 5-9 swing cylinder, 6 mounting base, 7-1 scissor valve, 7-2 first cylinder, 7-3 scissor frame, 7-4 connecting shaft, 7-5 clamping plate, 8 first dust collector hopper, 9 second dust collector hopper. Detailed Implementation

[0039] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0040] (Example 1)

[0041] like Figures 1 to 7 The airflow valve packaging machine shown includes a frame 1, an air-feeding pressurized hopper 2, a discharge device 3, an ultrasonic sealing machine 4, and a bag transfer device 5. The air-feeding pressurized hopper 2 is fixed to the top of the frame 1, and its lower end extends into the frame 1 and is connected to the discharge device. Under the action of the air-feeding pressurized hopper 2, the material enters the valve bag fitted at the outlet of the discharge device 3 to complete the filling. After filling, the ultrasonic sealing machine 4 automatically seals the bag, and then the bag transfer device 5 transfers it to the next process.

[0042] Specifically, the pneumatic pressurized hopper 2 includes a feed pipe 2-1, a loading hopper 2-2, an intermediate hopper 2-3, and a discharge hopper 2-4 connected sequentially from top to bottom. The feed pipe 2-1 is equipped with a pneumatic wafer-type butterfly valve 2-5 in the middle, which is suitable for controlling the opening and closing of the pneumatic pressurized hopper. The inner wall of the loading hopper 2-2 is fixed with a flow aid ring 2-6. The flow aid ring 2-6 is connected to an external compressed air source and is provided with air holes that spray towards the inner cavity of the pneumatic pressurized hopper. The airflow continuously impacts the material, reduces the friction between the material and the inner wall of the hopper, improves the flowability of the material, and thus ensures the stability of the material supply. The flow-aiding ring 2-6 includes an outer ring 2-6-1 and an inner upper ring 2-6-2 and an inner lower ring 2-6-3 located on the inner wall of the outer ring 2-6-1. The outer ring 2-6-1 is provided with an air inlet 2-6-4. The top of the inner upper ring 2-6-2 is sealed to the top of the outer ring 2-6-1, and the bottom is inclined toward the axis of the outer ring 2-6-1 and sealed to the top of the inner lower ring 2-6-3. The bottom of the inner lower ring 2-6-3 is connected to the bottom of the outer ring 2-6-1 and a notch 2-6-5 is uniformly provided around the circumference. The notch 2-6-5 and the outer ring 2-6-1 form an air hole. The top is formed by the inner upper ring 2-6-2 to form a smooth slope, which avoids interfering with the material flow and reduces the probability of material residue on the top of the flow aid ring 2-6. In addition, the bottom is formed by a notch 2-6-5 and the outer ring 2-6-1 to form air holes. The structure is simple and easy to process. The air holes are evenly set along the circumference to ensure that the inner wall of the hopper can be blown, thus improving the uniformity of air delivery.

[0043] Both the intermediate silo 2-3 and the unloading silo 2-4 are equipped with exhaust assemblies 2-7 that connect to their internal cavities on their outer periphery. Each exhaust assembly 2-7 includes a permeable plate mounted on the corresponding silo wall and a cover plate with a sealing cover mounted on the permeable plate. The cover plate is connected to an external negative pressure device via an air pipe. The exhaust assembly 2-7, in conjunction with the flow-aiding ring 2-6 of the loading silo 2-2, forms a more efficient pneumatic material flow channel, further improving material flowability and feeding speed. A level gauge 2-8 is also installed at the top of the intermediate silo 2-3 to monitor the material level within the silo, facilitating automated packaging operations.

[0044] The discharge device 3 includes a flexible clamp tube 3-1 and a discharge pipe 3-2 arranged sequentially along the discharge direction. The flexible clamp tube 3-1 is connected to the feeding hopper 2-4. A mounting base 6 is fixedly installed inside the frame 1. A scissor valve 7 is fixedly installed on the mounting base 6 and sleeved on the flexible clamp tube 3-1. The scissor valve 7 includes a first cylinder 7-1 fixedly installed on the top of the mounting base 6. The piston rod of the first cylinder 7-1 is vertically downward and hinged to a pair of connecting rods 7-2. The lower ends of the connecting rods 7-2 are respectively hinged to scissor frames 7-3. The two scissor frames 7-3 are arranged opposite each other and rotatably mounted on the side wall of the mounting base 6 through the same connecting shaft 7-4. The inner side of the lower end of each frame is fixedly fitted with a clamping plate 7-5. Driven by the first cylinder 7-1, the connecting rods and scissor frames drive the two clamping plates 7-5 to open and close, thereby clamping and releasing the flexible clamp tube, and thus controlling the connection and closure between the discharge device 3 and the pneumatic pressurized hopper 2.

[0045] The right end of the discharge pipe 3-2 is coaxially fitted with a dust cover 3-3, and the left end is fitted with a bag-supporting airbag 3-4. The end of the bag-supporting airbag 3-4 furthest from the outlet has a pressure ring 3-5 fitted onto the discharge pipe 3-2. The top of the outer circumference of the pressure ring 3-5 has a bag-blocking plate 3-6 and a sensing position 3-8. A liftable detection pressure head 3-9 is suspended above the sensing position 3-8. During filling, the valve bag is manually or automatically fitted onto the discharge pipe 3-2. The bag-blocking plate 3-6 limits the bag-fitting depth, and the bag-supporting airbag 3-4 inflates to seal the opening of the valve bag to be filled. The detection pressure head presses down to sense whether the valve bag is properly installed. Ventilation holes are provided in the overlapping area of ​​the discharge pipe 3-2 and the dust cover 3-3. The ventilation holes are covered with a ventilation plate 3-7, which is covered with micropores with a diameter smaller than that of the material particles. The dust cover 3-3 is provided with a suction pipe that connects to an external negative pressure device. Through the suction of the negative pressure device, the gas mixed with the material and the gas entering the valve bag are discharged through the micropores, increasing the gas emission efficiency.

[0046] To facilitate bagging operations, the outlet of the discharge pipe 3-2 in this embodiment is provided with a downwardly inclined discharge nozzle 3-10, which facilitates the bagging of valve bags without affecting the discharge speed.

[0047] To further improve the discharge speed, this embodiment provides a flow aid pipe 3-11 extending along the length direction on the inner wall of the discharge pipe 3-2. One end of the flow aid pipe 3-11 is directly opposite the outlet of the discharge pipe 3-2, and the other end is sealed and passed through the side wall of the discharge pipe and connected to external compressed air.

[0048] The ultrasonic sealing machine 4 is located above the discharge device 3 and includes a bracket 4-1 fixedly installed on the frame 1. The lower end of the bracket 4-1 is rotatably connected to a support arm 4-2, and the upper end is provided with a second cylinder 4-3. The cylinder body of the second cylinder 4-3 is hinged to the bracket 4-1, and the piston rod is hinged to the middle of the support arm 4-2. The other end of the support arm 4-2 is rotatably installed with a support 4-4. The top of the support 4-4 is fixedly mounted with an ultrasonic plastic welding machine 4-5, and the bottom is rotatably provided with a bracket 4-6. The sides of the ultrasonic plastic welding machine 4-5 are symmetrically provided with third cylinders 4-7 whose cylinder bodies are hinged to the support 4-4. The piston rod of the third cylinder 4-7 is hinged to the bracket 4-6. The second cylinder 4-3 drives the support arm 4-2 to rotate, thereby causing the support 4-4 to move up and down, so that the opening of the valve bag enters between the bracket 4-6 and the ultrasonic plastic welding machine 4-5. The third cylinder 4-7 drives the bracket 4-6 to move up, cooperating with the ultrasonic plastic welding machine 4-5 to complete the automatic sealing.

[0049] The bag-transfer device 5 is located below the discharge device and includes a weighing frame 5-1 suspended within the frame 1. A tilting frame 5-2 is rotatably connected to the bottom left side of the weighing frame 5-1, and cylinder seats 5-3 are symmetrically and vertically fixed to the middle right side. A fourth cylinder 5-4 is hinged to each of the two cylinder seats 5-3. The piston rods of the two fourth cylinders 5-4 are respectively hinged to the middle of the two sides of the tilting frame 5-2. A bag-transfer frame 5-5 is hinged to the upper end of the tilting frame 5-2. A screw jack 5-6 is fixed to the bottom of the bag-transfer frame 5-5. A slider seat 5-7 is fixed to the moving end of the screw jack 5-6. A support plate 5-8 is rotatably mounted on the front of the slider seat 5-7 via a rotating shaft, and a swing cylinder 5-9 is fixed to the back. The moving end of the swing cylinder 5-9 is connected to the rotating shaft via a connecting rod assembly. The fourth cylinder 5-4 drives the tilting frame 5-2 to rotate, thereby moving the support plate 5-8 and completing the transfer of the valve bag after filling.

[0050] In order to keep the packaging machine clean, this embodiment has a first dust removal hopper 8 and a second dust removal hopper 9 respectively below the discharge device 3 and the pneumatic pressurized hopper 2. The first dust removal hopper 8 and the second dust removal hopper 9 are respectively connected to an external negative pressure device through pipes.

[0051] This invention adds a flow-aiding ring 2-6 with air holes to the pneumatic pressurized hopper 2. The airflow continuously impacts the material, reducing friction between the material and the inner wall of the hopper and improving the material's flowability, thereby ensuring stable material supply. A venting plate 3-7 is added to the discharge device. Through the suction of the negative pressure device, the gas mixed with the material and the gas entering the valve bag are discharged through micropores, increasing gas discharge efficiency. The two sets of structures work together to ensure the smooth progress of the packaging process and improve the overall packaging efficiency.

[0052] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An airflow valve-type packaging machine, characterized in that: The device includes a frame, a pneumatic pressurized hopper fixed to the top of the frame, the lower end of the pneumatic pressurized hopper extending into the frame and connected to a discharge device, a flow aid ring coaxially fixed to the upper part of the inner cavity of the pneumatic pressurized hopper, the flow aid ring being connected to an external compressed air source and having air holes for spraying into the inner cavity of the pneumatic pressurized hopper, a dust cover coaxially fitted to the discharge device, and ventilation holes opened in the overlapping area with the dust cover, a dust suction pipe connected to an external negative pressure device on the dust cover, and a ventilation plate covering the ventilation holes, the ventilation plate being fully covered with micropores with a pore size smaller than the particle size of the material.

2. The airflow valve-type packaging machine according to claim 1, characterized in that: The pneumatic pressurized hopper includes a feed pipe, a loading hopper, an intermediate hopper, and a unloading hopper connected sequentially from top to bottom. The feed pipe is equipped with a pneumatic clamp-type butterfly valve in the middle, which is suitable for controlling the opening and closing of the pneumatic pressurized hopper. The flow aid ring is fixed to the inner wall of the loading hopper. The discharge device is connected to the unloading hopper. The outer circumference of the intermediate hopper and the unloading hopper are equipped with exhaust components that connect to the inner cavity. The exhaust components are connected to an external negative pressure device.

3. The airflow valve-type packaging machine according to claim 2, characterized in that: The flow-aiding ring includes an outer ring and an inner upper ring and an inner lower ring disposed on the inner wall of the outer ring. The outer ring is provided with an air inlet. The top of the inner upper ring is sealed to the top of the outer ring, and the bottom is inclined toward the axis of the outer ring and sealed to the top of the inner lower ring. The bottom of the inner lower ring is connected to the bottom of the outer ring and is provided with a notch evenly distributed around the circumference. The notch and the outer ring form the air hole.

4. The airflow valve-type packaging machine according to claim 2, characterized in that: The upper part of the intermediate silo is equipped with a level gauge.

5. The airflow valve-type packaging machine according to claim 1, characterized in that: The discharge device includes a flexible clamp tube and a discharge tube arranged sequentially along the discharge direction. The dust cover is installed at one end of the discharge tube near the flexible clamp tube. A bag-supporting airbag is sleeved on the other end of the discharge tube. A pressure ring is sleeved on the discharge tube at the end of the bag-supporting airbag away from the outlet. A bag-blocking plate is fixedly installed on the outer circumference of the pressure ring. A sensing position is provided on the top. A liftable detection pressure head is suspended above the sensing position.

6. The airflow valve-type packaging machine according to claim 5, characterized in that: The outlet of the discharge pipe is provided with a downwardly inclined oblique discharge nozzle.

7. The airflow valve-type packaging machine according to claim 5, characterized in that: The inner wall of the discharge pipe is provided with a flow aid pipe extending along the length direction. One end of the flow aid pipe is directly opposite the outlet of the discharge pipe, and the other end is sealed through the side wall of the discharge pipe and connected to external compressed air.

8. The airflow valve-type packaging machine according to claim 5, characterized in that: A mounting base is fixedly installed inside the frame, and a scissor valve sleeved on the mounting base is fixedly installed on the mounting base. The scissor valve is adapted to control the connection and closure of the discharge device and the pneumatic pressurized hopper by clamping and releasing the soft clamp tube.

9. The airflow valve-type packaging machine according to claim 1, characterized in that: It also includes an ultrasonic sealing machine and a bag transfer device, which are respectively located above and below the discharge device.

10. The airflow valve-type packaging machine according to claim 1, characterized in that: Below the discharge device and the pneumatic pressurized hopper, there are respectively a first dust removal hopper and a second dust removal hopper, and the first dust removal hopper and the second dust removal hopper are respectively connected to an external negative pressure device through pipes.

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