Valve bag packaging machine and method

Abstract

The invention provides a valve bag packaging machine and method, and relates to the technical field of packaging. When materials are filled into the valve bag, the valve bag is arranged at the end of the material conveying pipe in a sleeving mode, and the end of the valve bag and the end of the material conveying pipe are both located in the vacuum cavity defined by the two sub box bodies, so that negative pressure can be formed by vacuumizing the vacuum cavity, and the materials in the material storage device are sucked into the valve bag through the material conveying pipe; therefore, the gas content of the material entering the valve bag is reduced; in addition, a weighing sensor is further arranged, the weighing sensor can detect the weight of the box body (namely the two sub box bodies) in real time, and the filling ending moment of each valve bag is the moment when the weight information detected by the weighing sensor reaches a preset weight threshold value. Therefore, the plurality of valve bags after filling are highly consistent in weight. On the basis, the effect of filling the materials into the valve bag is improved, namely, the packaging effect of the valve bag is improved.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and in particular to a valve bag packaging machine and method. Background Art

[0002] Valve bags refer to containers used to package granular, powdery, blocky and other materials. They have excellent characteristics such as good sealing, high filling efficiency, neat stacking, and strong self-sustaining ability, and are widely used in the packaging of various materials. In the relevant technology, valve ports are opened at the corners of valve bags, and special packaging equipment is required when using valve bags to package materials. Specifically, the filling nozzle of the packaging equipment can be inserted into the valve port so that the material can enter the valve bag through the filling nozzle; however, the existing valve bag packaging equipment still has many shortcomings, such as large gas content of the material, difficult to control metering accuracy, poor shaping effect, poor sealing at the valve port, etc., which undoubtedly reduce the packaging effect of the valve bag packaging equipment. Summary of the invention

[0003] The present application provides a valve bag packaging machine and method, aiming to solve the problem of poor effect when using valve bag packaging equipment to can materials into valve bags in the related art.

[0004] In order to solve the above-mentioned drawbacks existing in the related art, the first aspect of the present application provides a valve bag packaging machine, including a main frame, a controller, a box, a material transport pipe, a vacuum tube, a switch device, a vacuum device, a material storage device, a weighing frame and a weighing sensor, the weighing frame is arranged on the main frame, the box includes two sub-boxes relatively arranged on the weighing frame, each sub-box is slidably matched with the weighing frame, each sub-box has a box opening facing the other sub-box, the switch device is arranged on the weighing frame and is driven and connected to the two sub-boxes, the material storage device and the vacuum device are both arranged on the main frame, one end of the material transport pipe is connected to the material storage device, and the other end extends between the two sub-boxes, one end of the vacuum tube is connected to the vacuum device, and the other end extends between the two sub-boxes, the weighing sensor is arranged on the weighing frame, and the switch device, the vacuum device, the material storage device and the weighing sensor are respectively connected to the controller in communication. Among them, the weighing sensor is used to sense the weight information of the box in real time. The controller is used to: after manually putting the valve mouth of the valve bag on the end of the material transport pipe, control the switch device to drive the two sub-boxes to move towards each other until they are docked, so that the two sub-boxes enclose a vacuum chamber, and accommodate the valve bag and the ends of the material transport pipe and the vacuum tube in the vacuum chamber; control the vacuum device to evacuate the vacuum chamber, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe; when the weight information reaches a preset weight threshold, control the material storage device to close, and control the vacuum device to break the vacuum chamber; control the switch device to drive the two sub-boxes to move away from each other, so that the valve bag containing the material can be manually taken away.

[0005] In some implementations, the weighing frame has a mounting plate, and each sub-box has a notch formed at its opening close to the mounting plate, and the two notches are opposite to each other; the valve bag packaging machine also includes a sleeve, one end of which is arranged on the side of the mounting plate away from the main frame, and the other end is located between the two notches, the end of the vacuum tube that is not connected to the vacuum device passes through the mounting plate and enters the sleeve, and the end of the material transport tube that is not connected to the material storage device passes through the mounting plate and enters the sleeve and extends from the other end of the sleeve. Specifically, after the switch device drives the two sub-boxes to move toward each other until they are docked, the two notches are used to form a through hole connected to the vacuum chamber through docking, so that the end of the sleeve away from the mounting plate is accommodated in the vacuum chamber through the through hole.

[0006] In some implementations, the valve bag packaging machine further includes an air bag, an air pipe, and an air filling and deflation device that is communicatively connected to the controller. The air bag is arranged on the outer wall of the material transport pipe and is located between the two sub-boxes. The air filling and deflation device is arranged on the main frame. One end of the air pipe is connected to the air filling and deflation device, and the other end of the air pipe is connected to the air bag. Specifically, the controller is also used to control the air filling and deflation device to fill the air bag through the air pipe within a preset time after the valve port of the valve bag is manually sleeved on the end of the material transport pipe, so that the air bag expands and squeezes the valve port; after the control switch device drives the two sub-boxes to move in opposite directions, the air filling and deflation device is controlled to deflate the air bag through the air pipe so that the valve bag containing the material can be manually taken away.

[0007] In one of the implementation schemes, the inflation and deflation device includes an air pump and an inflation and deflation valve that are communicatively connected to the controller, the air pump is arranged on the main frame and connected to the airbag through an air pipe, and the inflation and deflation valve is arranged on the air pipe. Based on this, the controller is specifically used to: after the valve port of the valve bag is manually sleeved on the end of the material transport pipe, control the inflation and deflation valve to open and control the air pump to start, so that the air pump inflates the airbag through the air pipe, and control the inflation and deflation valve to close and control the air pump to stop after a preset time, so that the inflated airbag is expanded and squeezes the valve port; after the control switch device drives the two sub-boxes to move in opposite directions, control the inflation and deflation valve to open, deflate the airbag, so that the valve bag containing the material can be manually taken away.

[0008] In one of the implementation schemes, an annular groove which is recessed inwards and located between the two sub-boxes is formed on the outer wall of the material transporting tube, and the airbag is sleeved on the material transporting tube and located in the annular groove.

[0009] In some implementations, the valve bag packaging machine further includes two shaping plates, which are respectively arranged in the two sub-boxes. Specifically, the two shaping plates are used to clamp the valve bag in the middle after the switch device drives the two sub-boxes to move toward each other until they are docked, so as to limit the shape of the valve bag during the process in which the material in the storage device is sucked into the valve bag through the material conveying pipe.

[0010] In one of the implementation schemes, the shaping plate includes a plate body, and side baffles extending toward the other shaping plate are formed on opposite sides of the plate body, and end baffles extending toward the other shaping plate are formed on opposite ends of the plate body. In this implementation scheme, each side baffle is perpendicular to the plate body, and each end baffle is inclined relative to the plate body. In this implementation scheme, a plurality of through holes are formed on the plate body, the two side baffles, and the two end baffles.

[0011] In some implementations, the switch device includes two cylinders, both of which are arranged on the weighing frame and are respectively communicatively connected to the controller, and the piston rods of the two cylinders are respectively connected to the two sub-boxes.

[0012] In some implementations, the vacuum device includes a vacuum pump, a vacuum valve, and a vacuum breaking valve that are respectively communicatively connected to the controller, the vacuum pump is arranged on the main frame, one end of the vacuum tube is connected to the vacuum pump, the vacuum valve is arranged on the vacuum tube, and the vacuum breaking valve is arranged on a sub-box. Based on this, the controller is specifically used to: after the switch device drives the two sub-boxes to move toward each other until they are docked, control the vacuum valve to open and the vacuum breaking valve to close, and control the vacuum pump to start, so that the vacuum pump evacuates the vacuum chamber through the vacuum tube; when the weight information reaches the preset weight threshold, control the vacuum pump to stop, and control the vacuum valve to close and the vacuum breaking valve to open, so as to break the vacuum of the vacuum chamber.

[0013] In some implementation schemes, the material storage device includes a storage tank and a switch valve. The storage tank is arranged on the main frame, one end of the material transport pipe is connected to the storage tank, the switch valve is arranged on the material transport pipe, the switch valve is communicatively connected to the controller, and the storage tank is used to store materials.

[0014] In some implementations, the valve bag packaging machine further includes a dust collection drawer, a dust removal pipe, and a dust extraction device that is communicatively connected to the controller, the dust collection drawer is slidably disposed on the main frame and is located below the box body, the dust extraction device is disposed on the main frame, one end of the dust removal pipe is connected to the dust extraction device, and the other end extends to the top of the dust collection drawer. Specifically, the controller is also used to control the dust extraction device to start, so that the dust extraction device sucks in dust in the environment, and transports the sucked dust to the dust collection drawer through the dust removal pipe.

[0015] In some implementations, the valve bag packaging machine further includes a sliding structure, which is disposed on a weighing frame, and the two sub-boxes are both disposed on the sliding structure and are both slidably matched with the weighing frame through the sliding structure. In one implementation, the sliding structure includes two slide rail assemblies and a plurality of rollers, the two slide rail assemblies are relatively disposed on the weighing frame and correspond to the opposite ends of the box, each slide rail assembly includes at least one slide rail, and at least one roller is rotatably disposed on the opposite ends of each sub-box, and each roller is disposed on the corresponding slide rail and is slidably matched with the corresponding slide rail.

[0016] In some implementation schemes, the valve bag packaging machine also includes two limit structures, both of which are arranged on the main frame and are located on opposite sides of the box body. The two limit structures are used to limit the positions of the two sub-boxes when the switch device drives the two sub-boxes to move away from each other.

[0017] In one of the implementation schemes, the limiting structure includes a limiting plate, a limiting column extending toward the box body is formed on one side of the limiting plate close to the box body, and an elastic member is sleeved on one end of the limiting column away from the limiting plate. In this implementation scheme, the elastic member and the limiting column are slidably matched, and a buffer spring is sleeved on the limiting column, and opposite ends of the buffer spring are respectively in contact with the elastic member and the limiting plate.

[0018] In some implementation schemes, the valve bag packaging machine also includes a control box arranged on the main frame, a touch screen is arranged on the outer wall of the control box, a controller is arranged in the control box, and the touch screen is communicatively connected to the controller.

[0019] In some implementations, the valve bag packaging machine further includes a vacuum pressure gauge, which is disposed on a sub-box and is used to sense pressure information in the vacuum chamber in real time.

[0020] In some implementations, each sub-box is provided with at least one observation window.

[0021] The second aspect of the present application provides a valve bag packaging method, which is applied to the controller of the valve bag packaging machine provided in the first aspect of the present application, comprising: after manually sleeveing ​​the valve mouth of the valve bag on the end of the material transport pipe, controlling the switch device to drive the two sub-boxes to move toward each other until they are docked, so that the two sub-boxes are enclosed to form a vacuum chamber, and the valve bag and the ends of the material transport pipe and the vacuum tube are accommodated in the vacuum chamber; controlling the vacuum device to evacuate the vacuum chamber, and opening the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe; when the weight information detected by the weighing sensor reaches a preset weight threshold, controlling the material storage device to close, and controlling the vacuum device to break the vacuum in the vacuum chamber; controlling the switch device to drive the two sub-boxes to move away from each other, so that the valve bag containing the material can be manually removed.

[0022] The valve bag packaging machine provided in the first aspect of the present application is composed of a main frame, a controller, a box, a material transport pipe, a vacuum tube, a switch device, a vacuum device, a material storage device, a weighing frame and a weighing sensor. The weighing frame is arranged on the main frame, and the box includes two sub-boxes relatively arranged on the weighing frame, each sub-box is slidably matched with the weighing frame, and each sub-box has a box opening facing the other sub-box. The switch device is arranged on the weighing frame and is driven and connected to the two sub-boxes. The material storage device and the vacuum device are both arranged on the main frame. One end of the material transport pipe is connected to the material storage device, and the other end extends between the two sub-boxes. One end of the vacuum tube is connected to the vacuum device, and the other end extends between the two sub-boxes. The weighing sensor is arranged on the weighing frame. In actual applications, when the valve mouth of the valve bag is manually placed on the end of the material transport pipe, the controller will control the switch device to drive the two sub-boxes to move toward each other until they are docked, so that the two sub-boxes are enclosed to form a vacuum chamber, and the valve bag, the material transport pipe and the end of the vacuum tube are accommodated in the vacuum chamber. After that, the controller will control the vacuum device to evacuate the vacuum chamber, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe. As the material in the valve bag gradually increases, when the weight information of the box detected by the weighing sensor reaches the preset weight threshold, the controller will control the material storage device to close, and control the vacuum device to break the vacuum chamber. Then, it will control the switch device to drive the two sub-boxes to move away from each other so that the valve bag containing the material can be manually removed. It can be seen that when filling materials into the valve bag, the present application will put the valve bag on the end of the material transport pipe, and the ends of the valve bag and the material transport pipe are both located in the vacuum chamber formed by the two sub-boxes. In this way, negative pressure can be formed by evacuating the vacuum chamber, so that the material in the storage device is sucked into the valve bag through the material transport pipe, thereby reducing the gas content of the material entering the valve bag; in addition, the present application also sets a weighing sensor, which can detect the weight of the box (i.e., the two sub-boxes) in real time. Since the weight of the box is known and unchanged, the weight information detected by the weighing sensor can be used to characterize the total weight of the valve bag and the material therein. For the filling of each valve bag, the filling end time is the time when the weight information detected by the weighing sensor reaches the preset weight threshold, which makes the weight of several valve bags after filling have a high consistency. The above will undoubtedly improve the effect of filling materials into the valve bag, that is, improve the packaging effect of the valve bag.

[0023] The valve bag packaging method provided in the second aspect of the present application is implemented based on the valve bag packaging machine provided in the first aspect of the present application, so it has all the advantages of the valve bag packaging machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the related technologies or the embodiments of the present application, the drawings required for use in the description of the related technologies or the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a valve bag packaging machine provided in an embodiment of the present application;

[0026] Figure 2 An exploded schematic diagram of a valve bag packaging machine provided in an embodiment of the present application;

[0027] Figure 3 Provided in the embodiments of this application Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 A schematic diagram of the structure of the shaping plate provided in the embodiment of the present application;

[0029] Figure 5 Provided in the embodiments of this application Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 6 Provided in the embodiments of this application Figure 2 A partial enlarged view of point C in the middle;

[0031] Figure 7 A schematic flow chart of the valve bag packaging method provided in an embodiment of the present application.

[0032] The symbols in the above drawings represent:

[0033] 1-main frame, 2-box, 3-material transport pipe, 4-vacuum tube, 5-switch device, 6-weighing frame, 7-sleeve, 8-air bag, 9-forming plate, 10-dust collection drawer, 11-dust removal pipe, 12-dust extraction device, 13-sliding structure, 14-limiting structure, 15-control box, 16-touch screen, 17-cantilever, 18-vacuum pressure gauge, 19-observation window, 21-sub-box, 22-vacuum chamber, 211-box mouth, 212-notch, 51-cylinder, 61-mounting plate, 91-plate body, 92-side baffle, 93-end baffle, 94-through hole, 131-slide rail assembly, 132-roller, 1311-slide rail, 141-limiting plate, 142-limiting column, 143-elastic part. DETAILED DESCRIPTION

[0034] In the related art, when using valve bags to package materials, special packaging equipment must be used. Specifically, the filling nozzle of the packaging equipment can be inserted into the valve port of the valve bag so that the material can enter the valve bag through the filling nozzle. However, the existing valve bag packaging equipment still has many shortcomings, such as large gas content of the material, difficult to control metering accuracy, poor shaping effect, poor sealing at the valve port, etc., which undoubtedly reduce the packaging effect of the valve bag packaging equipment. In view of this, the present application proposes a valve bag packaging machine and method in the following embodiments to solve the above-mentioned disadvantages in the related art.

[0035] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0036] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of the valve bag packaging machine. Figure 2 This is a disassembled schematic diagram of the valve bag packaging machine. Figure 3 yes Figure 2The embodiment provides a valve bag packaging machine, which includes a main frame 1, a controller (not shown), a box 2, a material transport pipe 3, a vacuum tube 4, a switch device 5, a vacuum device (not shown), a material storage device (not shown), a weighing frame 6 and a weighing sensor (not shown). The weighing frame 6 is arranged on the main frame 1, and the box 2 includes two sub-boxes 21 arranged on the weighing frame 6. Each sub-box 21 is slidably matched with the weighing frame 6, and each sub-box 21 has a direction toward the other sub-box. The box opening 211 of the box body 21, the switch device 5 is arranged on the weighing frame 6 and is driven and connected to the two sub-boxes 21, the material storage device and the vacuum device are both arranged on the main frame 1, one end of the material transport pipe 3 is connected to the material storage device, and the other end extends between the two sub-boxes 21, one end of the vacuum tube 4 is connected to the vacuum device, and the other end extends between the two sub-boxes 21, the weighing sensor is arranged on the weighing frame 6, and the switch device 5, the vacuum device, the material storage device and the weighing sensor are respectively connected to the controller for communication. In addition, it should be noted that the controller can adopt any device commonly used in the field with control and data processing and analysis functions, such as a microcontroller such as a small computer, a single-chip microcomputer, an industrial control computer (IPC), a programmable logic controller (PLC) and a distributed control system (DCS), etc., and this embodiment does not make a sole limitation on this.

[0037] In this embodiment, the weighing sensor is used to sense the weight information of the box 2 in real time. The controller is used to: after the valve port of the valve bag is manually sleeved on the end of the material delivery pipe 3, control the switch device 5 to drive the two sub-boxes 21 to move toward each other until they are docked, so that the two sub-boxes 21 are enclosed to form a vacuum chamber 22, and the valve bag and the ends of the material delivery pipe 3 and the vacuum tube 4 are accommodated in the vacuum chamber 22; control the vacuum device to evacuate the vacuum chamber 22, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material delivery pipe 3; when the weight information reaches the preset weight threshold, control the material storage device to close, and control the vacuum device to break the vacuum chamber 22; control the switch device 5 to drive the two sub-boxes 21 to move away from each other, so that the valve bag containing the material can be manually taken away. It can be understood that the weight of the box body 2 includes two parts. One is the weight of the box body 2 itself, and the other is the weight of the valve bag and the material in the valve bag in the box body 2. As the material in the valve bag gradually increases, the weight of the box body 2 will gradually increase. The weight of the box body 2 will cause the weighing frame 6 to produce a certain pressure or deformation relative to the main frame 1. The weighing sensor can accurately measure this change and then derive the weight of the box body 2.

[0038] That is to say, in actual application, when the valve mouth of the valve bag is manually sleeved on the end of the material transport pipe 3 between the two sub-boxes 21, the controller will control the switch device 5 to drive the two sub-boxes 21 to move toward each other until they are docked, so that the two sub-boxes 21 enclose a vacuum chamber 22, and the valve bag and the ends of the material transport pipe 3 and the vacuum tube 4 between the two sub-boxes 21 are all accommodated in the vacuum chamber 22. Then, the controller will control the vacuum device to evacuate the vacuum chamber 22 to form a negative pressure in the vacuum chamber 22, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe 3. As the material in the valve bag gradually increases, when the weight information of the box 2 detected by the weighing sensor reaches the preset weight threshold, it means that the valve bag is full of material. The controller will control the material storage device to close, and control the vacuum device to break the vacuum in the vacuum chamber 22. Then, the controller will control the switch device 5 to drive the two sub-boxes 21 to move away from each other so that the valve bag containing the material can be manually removed.

[0039] As can be seen from the above, when filling the valve bag with materials, the valve bag will be placed on the end of the material delivery pipe 3 in this embodiment, and the ends of the valve bag and the material delivery pipe 3 are both located in the vacuum chamber 22 formed by the two sub-boxes 21. In this way, negative pressure can be formed by evacuating the vacuum chamber 22, so that the material in the storage device is sucked into the valve bag through the material delivery pipe 3, thereby reducing the gas content of the material entering the valve bag; in addition, a weighing sensor is also provided in this embodiment, and the weighing sensor can detect the weight of the box 2 in real time. Since the weight of the box 2 is known and unchanged, the weight information detected by the weighing sensor can be used to characterize the total weight of the valve bag and the material therein, and for the filling of each valve bag, the filling end time is the time when the weight information detected by the weighing sensor reaches the preset weight threshold, which makes the weight of the valve bags after the filling is completed have a high consistency. The above will undoubtedly improve the effect of filling materials into the valve bag, that is, improve the packaging effect of the valve bag.

[0040] In some embodiments, see Figures 1 to 3The weighing frame 6 has a mounting plate 61, and a notch 212 close to the mounting plate 61 is formed at the box opening 211 of each sub-box 21, and the two notches 212 of the two sub-boxes 21 are opposite. On this basis, in addition to the structure given above, the valve bag packaging machine also includes a sleeve 7, one end of the sleeve 7 is arranged on the side of the mounting plate 61 away from the main frame 1, and the other end is located between the two notches 212, the end of the vacuum tube 4 not connected to the vacuum device passes through the mounting plate 61 and enters the sleeve 7, and the end of the material transport pipe 3 not connected to the material storage device passes through the mounting plate 61 and enters the sleeve 7 and extends from the other end of the sleeve 7. Specifically, after the switch device 5 drives the two sub-boxes 21 to move toward each other until they are docked, the two notches 212 will dock together and form a through hole (not shown) connected to the vacuum chamber 22, so that the end of the sleeve 7 away from the mounting plate 61 is accommodated in the vacuum chamber 22 through the through hole. This is equivalent to accommodating the end of the vacuum tube 4 that is not connected to the vacuum device and the end of the material transport tube 3 that is not connected to the material storage device in the vacuum chamber 22, and when the two notches 212 are docked to form the through hole, the hole wall of the through hole and the sleeve 7 are tightly matched without a gap, so as to ensure the sealing of the vacuum chamber 22 formed after the two sub-boxes 21 are docked.

[0041] In some embodiments, see Figures 1 to 3 In addition to the structure given above, the valve bag packaging machine also includes an air bag 8, an air pipe (not shown) and an air filling and deflation device (not shown) connected to the controller by communication. The air bag 8 is arranged on the outer wall of the material conveying pipe 3 and is located between the two sub-boxes 21. The air filling and deflation device is arranged on the main frame 1. One end of the air pipe is connected to the air filling and deflation device, and the other end of the air pipe is connected to the air bag 8. Specifically, the controller is also used to control the air filling and deflation device to inflate the inside of the air bag 8 through the air pipe within a preset time after the valve port of the valve bag is manually sleeved on the end of the material conveying pipe 3, so that the air bag 8 expands to open and squeeze the valve port; after the control switch device 5 drives the two sub-boxes 21 to move in opposite directions, the air filling and deflation device is controlled to deflate the air bag 8 through the air pipe so that the valve bag containing the material can be manually taken away. That is to say, in actual application, when the valve port of the valve bag is manually sleeved on the end of the material transport pipe 3 between the two sub-boxes 21, the controller will control the inflation and deflation device to inflate the airbag 8 through the air pipe, so that the expanded airbag 8 opens and squeezes the valve port of the valve bag, so that the sealing of the valve port can be ensured, so that the material will not leak from the valve port during the subsequent filling process of the valve bag, which can further improve the packaging effect of the valve bag. Preferably, an annular groove (not shown) is formed on the outer wall of the material transport pipe 3 and is recessed inward and located between the two sub-boxes 21, and the airbag 8 is sleeved on the material transport pipe 3 and located in the annular groove.

[0042] As one or more embodiments thereof, the inflation and deflation device includes an air pump (not shown) and an inflation and deflation valve (not shown) which are communicatively connected to the controller. The air pump is arranged on the main frame 1 and connected to the airbag 8 through an air pipe, and the inflation and deflation valve is arranged on the air pipe. Based on this, the controller is specifically used to: after the valve port of the valve bag is manually sleeved on the end of the material transport pipe 3, control the inflation and deflation valve to open and control the air pump to start, so that the air pump inflates the airbag 8 through the air pipe, and control the inflation and deflation valve to close and control the air pump to stop after a preset time, so that the inflated airbag 8 is expanded and squeezes the valve port; after the control switch device 5 drives the two sub-boxes 21 to move in opposite directions, control the inflation and deflation valve to open to deflate the airbag 8, so as to manually take away the valve bag containing the material. It can be understood that the air pump does not inflate the airbag 8 all the time, but only inflates for a preset time to prevent the airbag 8 from bursting due to excessive inflation time.

[0043] In some embodiments, see Figures 1 to 3 In addition to the structure given above, the valve bag packaging machine also includes two shaping plates 9, which are respectively arranged in the two sub-boxes 21. Specifically, the two shaping plates 9 are used to clamp the valve bag in the middle after the switch device 5 drives the two sub-boxes 21 to move toward each other until they are docked, so as to limit the shape of the valve bag during the process in which the material in the storage device is sucked into the valve bag through the material transport pipe 3. It can be understood that after the two sub-boxes 21 move toward each other until they are docked, the two shaping plates 9 will clamp the valve bag in the middle, then in the subsequent process of filling the material into the valve bag, as the material in the valve bag gradually increases, the valve bag will gradually expand, but the expansion of the valve bag will be limited by the two shaping plates 9, that is, the restriction on the shape of the valve bag is achieved by the two shaping plates 9. Preferably, the shape of the valve bag is square after the filling is completed.

[0044] As one or more embodiments, please combine Figure 4 , Figure 4The structural schematic diagram of the shaping plate 9 is shown. The shaping plate 9 includes a plate body 91. The opposite sides of the plate body 91 are formed with side baffles 92 extending in the direction of the other shaping plate 9. The opposite ends of the plate body 91 are formed with end baffles 93 extending in the direction of the other shaping plate 9. It can be understood that since each shaping plate 9 includes two side baffles 92 located on both sides and two end baffles 93 located on both ends, when the switch device 5 drives the two sub-boxes 21 to move toward each other until they are docked, the two shaping plates 9 will not only sandwich the valve bag in the middle, but also surround the valve bag through the two side baffles 92 and the two end baffles 93, so that the four-sided shaping of the valve bag can be achieved, the shaping effect is better, and the packaging effect of the valve bag can be further improved. Preferably, each side baffle 92 is perpendicular to the plate body 91, and each end baffle 93 is inclined relative to the plate body 91; a plurality of through holes 94 are provided on the plate body 91, each side baffle 92 and each end baffle 93, and these through holes 94 can not only reduce the material used in making the shaping plate 9, thereby reducing the cost, but also release the extrusion force between the valve bag and the shaping plate 9 when the valve bag expands due to the increase of internal material, thereby preventing the valve bag from being squeezed.

[0045] In some embodiments, see Figures 1 to 3 , the switch device 5 includes two cylinders 51, both of which are arranged on the weighing frame 6 and are respectively connected to the controller for communication, and the piston rods of the two cylinders 51 are respectively connected to the two sub-boxes 21, that is, the present application realizes the movement of the two sub-boxes 21 toward and away from each other through the two cylinders 51. Of course, the method of driving the two sub-boxes 21 to move toward and away from each other is not limited to the cylinder 51. In other embodiments, other commonly used driving methods in the field can also be used to realize the movement of the two sub-boxes 21 toward and away from each other, such as hydraulic cylinders, electric push rods, etc., or it can also be an electric motor with some transmission structures that can convert rotational motion into linear motion (such as ball screw nuts, gear racks, worm gears, synchronous belts, etc.), which can be selected according to actual needs, and the present application does not make a sole limitation on this.

[0046] In some embodiments, see Figures 1 to 3The vacuum device includes a vacuum pump (not shown), a vacuum valve (not shown) and a vacuum breaking valve (not shown) which are respectively connected to the controller by communication. The vacuum pump is arranged on the main frame 1, one end of the vacuum tube 4 is connected to the vacuum pump, the vacuum valve is arranged on the vacuum tube 4, and the vacuum breaking valve is arranged on one of the sub-boxes 21. Based on this, the controller is specifically used for: after the switch device 5 drives the two sub-boxes 21 to move toward each other until they are docked, the vacuum valve is controlled to open and the vacuum breaking valve is closed, and the vacuum pump is controlled to start, so that the vacuum pump evacuates the vacuum chamber 22 through the vacuum tube 4; when the weight information reaches the preset weight threshold, the vacuum pump is controlled to stop, and the vacuum valve is controlled to close and the vacuum breaking valve is controlled to open, so as to break the vacuum of the vacuum chamber 22.

[0047] That is to say, in actual application, after the two sub-boxes 21 move toward each other until they are docked, the controller will control the vacuum breaking valve to close and the vacuum valve to open, thereby opening the channel between the vacuum pump and the vacuum chamber 22 (i.e., the vacuum tube 4), and then the controller will control the vacuum pump to start so that the vacuum chamber 22 can be evacuated by the vacuum pump, thereby sucking the material in the storage device into the valve bag through the negative pressure in the vacuum chamber 22; as the material in the valve bag gradually increases, when the weight information detected by the weighing sensor reaches the preset weight threshold, the controller will first control the vacuum pump to stop and the vacuum valve to close, and then control the vacuum breaking valve to open, thereby connecting the vacuum chamber 22 with the outside space, so that the outside air quickly enters the vacuum chamber 22 through the vacuum breaking valve, and then quickly reduces the vacuum degree in the vacuum chamber 22, which is convenient for the subsequent opening of the box 2 (i.e., the switch device 5 drives the two sub-boxes 21 to move away from each other).

[0048] In some embodiments, see Figures 1 to 3 , the material storage device includes a material storage tank (not shown) and a switch valve (not shown), the material storage tank is arranged on the main frame 1, one end of the material delivery pipe 3 is connected to the material storage tank, the switch valve is arranged on the material delivery pipe 3, and the switch valve is communicatively connected to the controller. It can be understood that the present application stores materials through the material storage tank, and in actual application, when the switch device 5 drives the two sub-boxes 21 to move toward each other until they are docked, the controller will control the switch valve to open, thereby connecting the channel between the material storage tank and the valve bag (i.e., the material delivery pipe 3), so as to ensure that after the subsequent vacuum device evacuates the vacuum chamber 22, the material in the material storage tank is smoothly sucked into the valve bag through the material delivery pipe 3; as the material in the valve bag gradually increases, when the weight information detected by the weighing sensor reaches the preset weight threshold, it means that the valve bag is full of materials, and the controller will control the switch valve to close, thereby isolating the channel between the material storage tank and the valve bag, that is, stopping filling the material into the valve bag.

[0049] In some embodiments, see Figures 1 to 3In addition to the structure given above, the valve bag packaging machine also includes a dust collection drawer 10, a dust removal pipe 11 and a dust extraction device 12 that is communicatively connected to the controller. The dust collection drawer 10 is slidably arranged on the main frame 1 and is located below the box body 2. The dust extraction device 12 is arranged on the main frame 1. One end of the dust removal pipe 11 is connected to the dust extraction device 12, and the other end extends to the top of the dust collection drawer 10. Specifically, the controller is also used to control the dust extraction device 12 to start, so that the dust extraction device 12 sucks dust in the environment, and transports the sucked dust to the dust collection drawer 10 through the dust removal pipe 11. That is to say, in actual application, when the valve bag is packaged, dust will inevitably be generated in the surrounding environment. If the dust is not handled in time, after the valve bag containing the material is removed from the material transport pipe 3, the dust will easily enter the valve bag, thereby contaminating the material in the valve bag; therefore, the present application is equipped with a dust removal system consisting of a dust collection drawer 10, a dust removal pipe 11 and a dust extraction device 12 for the valve bag packaging machine. Through the dust removal system, dust in the environment can be collected in the dust collection drawer 10. Since the dust collection drawer 10 and the main frame 1 are slidably matched, when there is a lot of dust in the dust collection drawer 10, the dust collection drawer 10 can be slid off the main frame 1 and the dust inside can be poured out, and then the dust collection drawer 10 can be assembled on the main frame 1. In addition, it should be noted that the technology of the dust extraction device 12 in this field is relatively mature, and it is mainly composed of structures such as a fan and a filter. The present application does not make too many explanations on the structure and working principle of the dust extraction device 12.

[0050] In some embodiments, see Figures 1 to 3 In addition to the structure given above, the valve bag packaging machine also includes a sliding structure 13, which is arranged on the weighing frame 6. The two sub-boxes 21 are both arranged on the sliding structure 13 and are slidably matched with the weighing frame 6 through the sliding structure 13. As one or more embodiments thereof, please combine Figure 5 and Figure 6 , Figure 5 yes Figure 2 A partial enlarged view of point B in the middle. Figure 6 yes Figure 2A partial enlarged view of point C in the middle; the sliding structure 13 includes two slide rail assemblies 131 and a plurality of rollers 132, the two slide rail assemblies 131 are relatively arranged on the weighing frame 6 and correspond to the opposite ends of the box body 2 respectively, each slide rail assembly 131 includes at least one slide rail 1311, and at least one roller 132 is rotatably provided on the opposite ends of each sub-box body 21, and each roller 132 is embraced on the corresponding slide rail 1311 and slidably cooperates with the corresponding slide rail 1311; that is, the present application realizes the sliding cooperation between the two sub-box bodies 21 and the weighing frame 6 through the slide rails 1311 and the rollers 132. As for the number of slide rails 1311 included in each slide rail assembly 131, the number of rollers 132 rotatably provided on one end of each sub-box body 21, etc., they can all be selected according to actual needs, and the present application does not make a sole limitation on this. Of course, the structure for realizing the sliding cooperation between the two sub-boxes 21 and the weighing frame 6 is not limited to the slide rails 1311 and the rollers 132. In other embodiments, other structures commonly used in the art may also be used to realize the sliding of the two sub-boxes 21 relative to the weighing frame 6, such as sliders and slide grooves, slip rings and slide rods, etc. The specific selection can be based on actual needs, and the present application does not make a sole limitation on this.

[0051] In some embodiments, see Figure 5In addition to the structure given above, the valve bag packaging machine also includes two limiting structures 14. The two limiting structures 14 are both arranged on the main frame 1 and are respectively located on the opposite sides of the box body 2. The two limiting structures 14 are used to limit the positions of the two sub-box bodies 21 when the switch device 5 drives the two sub-box bodies 21 to move away from each other, so as to prevent the two sub-box bodies 21 from detaching from the slide rail assembly 131 and falling when moving away from each other. As one or more embodiments, the limiting structure 14 includes a limiting plate 141, and a limiting column 142 extending in the direction of the box body 2 is formed on the side of the limiting plate 141 close to the box body 2, and an elastic member 143 is sleeved on the end of the limiting column 142 away from the limiting plate 141; it can be understood that when the switch device 5 drives the two sub-boxes 21 to move in opposite directions, when the sub-box 21 moves into position, the sub-box 21 will abut against the elastic member 143, so that the position of the sub-box 21 can be limited, and the elastic member 143 itself has good elastic properties, which can play a certain buffering role, thereby avoiding the sub-box 21 from being damaged by hitting the limiting structure 14. In addition, it should be noted that the elastic properties of the elastic member 143 can be obtained by using elastic materials (such as rubber, polyurethane, etc.) as a whole, or by coating a rubber layer on the outer surface of the main body. The specific selection can be based on actual needs, and this application does not make a sole limitation on this. Preferably, the elastic member 143 is slidably matched with the limiting column 142, and a buffer spring (not shown) is sleeved on the limiting column 142, and the opposite ends of the buffer spring are respectively abutted against the elastic member 143 and the limiting plate 141, so that the buffering performance of the limiting structure 14 can be further improved to ensure that the sub-box 21 will not be damaged due to impacting the limiting structure 14.

[0052] In some embodiments, see Figure 1 and Figure 2In addition to the structure given above, the valve bag packaging machine also includes a control box 15 arranged on the main frame 1, the controller is arranged in the control box 15, and a touch screen 16 is arranged on the outer wall of the control box 15, and the touch screen 16 is communicatively connected to the controller. It can be understood that in actual applications, the controller can display various data involved in the valve bag packaging process on the touch screen 16, such as the weight information of the box body 2, the vacuum degree of the vacuum chamber 22, the preset weight threshold, the model of the valve bag, the name of the material and the time consumed by filling, so that the staff can clearly understand the packaging situation of the valve bag through the data displayed on the touch screen 16; in addition, the staff can also send control instructions to the controller through the touch screen 16, such as filling start instructions, filling pause instructions, instructions for the switch device 5 to drive the two sub-boxes 21 to move in opposite directions, etc., so as to control the packaging process of the valve bag; of course, the staff can also send instructions to modify parameters to the controller through the touch screen 16, such as instructions to modify the preset weight threshold, etc. Preferably, the main frame 1 may be equipped with a cantilever 17 , one end of the cantilever 17 is disposed on the main frame 1 , and the control box 15 is disposed on the other end of the cantilever 17 , so that it is convenient for the staff to watch or operate the touch screen 16 .

[0053] In some embodiments, see Figure 1 and Figure 2 In addition to the structure given above, the valve bag packaging machine also includes a vacuum pressure gauge 18, which is set on one of the sub-boxes 21. The vacuum pressure gauge 18 can sense the pressure information (positive pressure and negative pressure) inside the vacuum chamber 22 in real time. In addition, it should be noted that the vacuum pressure gauge 18 can be traditional, and the staff needs to observe the vacuum pressure gauge 18 by themselves to learn the pressure information inside the vacuum chamber 22; of course, the vacuum pressure gauge 18 can also be digital, and the vacuum pressure gauge 18 can transmit the detected pressure information to the controller, and the controller can display the pressure information on the touch screen 16 for the staff to view. It should also be noted that for the vacuum chamber 22, in addition to the pressure information inside the vacuum chamber 22, the staff sometimes needs to understand the filling situation of the material in the vacuum chamber 22, so at least one observation window 19 can be set on each sub-box 21, so that the staff can view the situation inside the vacuum chamber 22 through the observation window 19, and then intuitively understand the packaging situation of the valve bag.

[0054] See also Figure 7 , Figure 7This embodiment provides a valve bag packaging method, which is applied to the valve bag packaging machine described above, that is, the valve bag packaging method is implemented based on the valve bag packaging machine described above. Specifically, the controller of the valve bag packaging machine described above is used as the execution body, and the valve bag packaging method includes steps 701 to 704 (abbreviated as S701 to S704), namely: S701, after the valve mouth of the valve bag is manually sleeved on the end of the material transport pipe, the switch device is controlled to drive the two sub-boxes to move toward each other until they are docked, so that the two sub-boxes are enclosed to form a vacuum chamber, and the valve bag and the ends of the material transport pipe and the vacuum tube are accommodated in the vacuum chamber; S702, the vacuum device is controlled to evacuate the vacuum chamber, and the material storage device is opened, so that the material in the material storage device is sucked into the valve bag through the material transport pipe; S703, when the weight information detected by the weighing sensor reaches the preset weight threshold, the material storage device is controlled to be closed, and the vacuum device is controlled to break the vacuum in the vacuum chamber; S704, the switch device is controlled to drive the two sub-boxes to move away from each other, so that the valve bag containing the material can be manually taken away. It should be noted that for any incomplete description of the valve bag packaging method, please refer to the previous description of the valve bag packaging machine, which will not be repeated in this embodiment.

[0055] The above embodiments are only preferred implementations of the present application, and are not the only limitations on valve bag packaging machines and related methods. In this regard, those skilled in the art can flexibly set them according to actual application scenarios based on the above embodiments. It can be understood that, through the implementation of the above embodiments of the present application, the valve bag packaging machine is composed of a main frame 1, a controller, a box body 2, a material transport pipe 3, a vacuum tube 4, a switch device 5, a vacuum device, a material storage device, a weighing frame 6 and a weighing sensor. The weighing frame 6 is arranged on the main frame 1, and the box body 2 includes two sub-boxes 21 relatively arranged on the weighing frame 6, each sub-box 21 is slidably matched with the weighing frame 6, and each sub-box 21 has a box opening 211 facing the other sub-box 21. The switch device 5 is arranged on the weighing frame 6 and is driven and connected to the two sub-boxes 21. The material storage device and the vacuum device are both arranged on the main frame 1. One end of the material transport pipe 3 is connected to the material storage device, and the other end extends between the two sub-boxes 21. One end of the vacuum tube 4 is connected to the vacuum device, and the other end extends between the two sub-boxes 21. The weighing sensor is arranged on the weighing frame 6. In actual application, after the valve mouth of the valve bag is manually sleeved on the end of the material transport pipe 3, the controller will control the switch device 5 to drive the two sub-boxes 21 to move toward each other until they are docked, so that the two sub-boxes 21 enclose a vacuum chamber 22, and the valve bag and the ends of the material transport pipe 3 and the vacuum tube 4 are accommodated in the vacuum chamber 22. After that, the controller will control the vacuum device to evacuate the vacuum chamber 22, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe 3. As the material in the valve bag gradually increases, when the weight information of the box 2 detected by the weighing sensor reaches the preset weight threshold, the controller will control the material storage device to close, and control the vacuum device to break the vacuum chamber 22. Then, it will control the switch device 5 to drive the two sub-boxes 21 to move away from each other, so that the valve bag containing the material can be manually taken away. It can be seen that when filling the valve bag with materials, the present application will put the valve bag on the end of the material transport pipe 3, and the ends of the valve bag and the material transport pipe 3 are both located in the vacuum chamber 22 formed by the two sub-boxes 21. In this way, negative pressure can be formed by evacuating the vacuum chamber 22, so that the material in the storage device is sucked into the valve bag through the material transport pipe 3, thereby reducing the gas content of the material entering the valve bag; in addition, the present application also sets a weighing sensor, which can detect the weight of the box 2 in real time. Since the weight of the box 2 is known and unchanged, the weight information detected by the weighing sensor can be used to characterize the total weight of the valve bag and the material therein. For the filling of each valve bag, the filling end time is the time when the weight information detected by the weighing sensor reaches the preset weight threshold, which makes the weight of the valve bags after the filling is completed have a high consistency. Based on this, the present application improves the effect of filling materials into the valve bag, that is, improves the packaging effect of the valve bag.

[0056] It should be noted that the several embodiments shown in the present application above are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can refer to each other. It should also be noted that in the text description of the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the terms "include", "comprise" or any other corresponding variants are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only these elements, but also other elements that are not explicitly listed, or may also include elements inherent to such a process, method, article or device; and, in the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0057] In addition, by implementing the several embodiments shown above in the present application, professionals and technicians in this field can implement or use the present application. For the several embodiments shown above in the present application, various modifications will be obvious to professionals and technicians in this field, and the general principles defined in the present application can be implemented in other embodiments not shown without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the several embodiments shown above, but will conform to the widest range consistent with the principles and novel features disclosed in the present application.

Claims

1. A valve bag packaging machine, characterized in that: The invention comprises a main frame, a controller, a box, a material transport pipe, a vacuum tube, a switch device, a vacuum device, a material storage device, a weighing frame and a weighing sensor, wherein the weighing frame is arranged on the main frame, the box body comprises two sub-box bodies arranged relatively on the weighing frame, each of the sub-box bodies is slidably matched with the weighing frame, each of the sub-box bodies has a box opening facing the other sub-box body, the switch device is arranged on the weighing frame and is drivingly connected to the two sub-box bodies, the material storage device and the vacuum device are both arranged on the main frame, one end of the material transport pipe is connected to the material storage device, and the other end extends between the two sub-box bodies, one end of the vacuum tube is connected to the vacuum device, and the other end extends between the two sub-box bodies, the weighing sensor is arranged on the weighing frame, the switch device, the vacuum device, the material storage device and the weighing sensor are respectively connected to the controller for communication, wherein: The weighing sensor is used to sense the weight information of the box in real time; The controller is used to: after manually putting the valve mouth of the valve bag on the end of the material transport pipe, control the switch device to drive the two sub-boxes to move toward each other until they are docked, so that the two sub-boxes enclose a vacuum chamber, and accommodate the valve bag and the ends of the material transport pipe and the vacuum tube in the vacuum chamber; control the vacuum device to evacuate the vacuum chamber, and open the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe; when the weight information reaches a preset weight threshold, control the material storage device to close, and control the vacuum device to break the vacuum in the vacuum chamber; control the switch device to drive the two sub-boxes to move away from each other, so that the valve bag containing the material can be manually taken away.

2. The valve bag packaging machine according to claim 1, characterized in that: It also includes a sleeve, the weighing frame has a mounting plate, the box opening of each sub-box is formed with a notch close to the mounting plate, the two notches are opposite, one end of the sleeve is arranged on the side of the mounting plate away from the main frame, and the other end is located between the two notches, the end of the vacuum tube not connected to the vacuum device passes through the mounting plate and enters the sleeve, and the end of the material transport pipe not connected to the material storage device passes through the mounting plate and enters the sleeve and extends from the other end of the sleeve; After the switch device drives the two sub-boxes to move toward each other until they are docked, the two notches are used to form a through hole connected to the vacuum chamber through docking, so that the end of the sleeve away from the mounting plate can be accommodated in the vacuum chamber through the through hole.

3. The valve bag packaging machine according to claim 1, characterized in that: It also includes an air bag, an air pipe and an air inflation and deflation device which is communicatively connected to the controller, the air bag is arranged on the outer wall of the material transport pipe and is located between the two sub-boxes, the air inflation and deflation device is arranged on the main frame, one end of the air pipe is connected to the air inflation and deflation device, and the other end is connected to the air bag; The controller is also used to: after manually putting the valve port of the valve bag on the end of the material transport pipe, control the inflation and deflation device to inflate the air bag through the air pipe within a preset time period to expand the air bag to open and squeeze the valve port; after controlling the switch device to drive the two sub-boxes to move away from each other, control the inflation and deflation device to deflate the air bag through the air pipe so that the valve bag containing the material can be manually removed.

4. The valve bag packaging machine according to claim 3, characterized in that: The inflation and deflation device comprises an air pump and an inflation and deflation valve which are communicatively connected to the controller, the air pump is arranged on the main frame and connected to the airbag through the air pipe, and the inflation and deflation valve is arranged on the air pipe; The controller is specifically used for: after manually sleeveing ​​the valve port of the valve bag on the end of the material transport pipe, controlling the inflation and deflation valve to open and controlling the air pump to start, so that the air pump inflates the air bag through the air pipe, and controlling the inflation and deflation valve to close and controlling the air pump to stop after a preset period of time, so that the inflated air bag opens and squeezes the valve port; after controlling the switch device to drive the two sub-boxes to move in opposite directions, controlling the inflation and deflation valve to open and deflate the air bag, so that the valve bag containing the material can be manually taken away.

5. The valve bag packaging machine according to claim 3, characterized in that: An inwardly recessed annular groove is formed on the outer wall of the material transporting tube, the annular groove is located between the two sub-boxes, and the airbag is sleeved on the material transporting tube and located in the annular groove.

6. The valve bag packaging machine according to claim 1, characterized in that: It also includes two shaping plates, which are respectively arranged in the two sub-boxes; The two shaping plates are used to clamp the valve bag in the middle after the switch device drives the two sub-boxes to move toward each other until they are docked, so as to limit the shape of the valve bag when the material in the storage device is sucked into the valve bag through the material transport pipe.

7. The valve bag packaging machine according to claim 6, characterized in that: The shaping plate comprises a plate body, and side baffles extending toward the other shaping plate are formed on opposite sides of the plate body, and end baffles extending toward the other shaping plate are formed on opposite ends.

8. The valve bag packaging machine according to claim 7, characterized in that: The side baffle is perpendicular to the plate body, and the end baffle is arranged obliquely relative to the plate body.

9. The valve bag packaging machine according to claim 7, characterized in that: The plate body, the side baffles and the end baffles are all provided with a plurality of through holes.

10. The valve bag packaging machine according to claim 1, characterized in that: The switch device comprises two cylinders, both of which are arranged on the weighing frame and are respectively connected to the controller for communication, and piston rods of the two cylinders are respectively connected to the two sub-boxes.

11. The valve bag packaging machine according to claim 1, characterized in that: The vacuum device comprises a vacuum pump, a vacuum valve and a vacuum breaking valve respectively connected to the controller in communication, the vacuum pump is arranged on the main frame, one end of the vacuum tube is connected to the vacuum pump, the vacuum valve is arranged on the vacuum tube, and the vacuum breaking valve is arranged on one of the sub-boxes; The controller is specifically used for: after the switch device drives the two sub-boxes to move toward each other until they are docked, controlling the vacuum valve to open and the vacuum breaking valve to close, and controlling the vacuum pump to start, so that the vacuum pump evacuates the vacuum chamber through the vacuum tube; when the weight information reaches a preset weight threshold, controlling the vacuum pump to stop, and controlling the vacuum valve to close and the vacuum breaking valve to open, so as to break the vacuum in the vacuum chamber.

12. The valve bag packaging machine according to claim 1, characterized in that: The material storage device includes a material storage tank and a switch valve. The material storage tank is arranged on the main frame. One end of the material transport pipe is connected to the material storage tank. The switch valve is arranged on the material transport pipe. The switch valve is communicatively connected to the controller. The material storage tank is used to store the material.

13. The valve bag packaging machine according to claim 1, characterized in that: It also includes a dust collection drawer, a dust removal pipe and a dust extraction device communicatively connected to the controller. The dust collection drawer is slidably arranged on the main frame and is located below the box body. The dust extraction device is arranged on the main frame. One end of the dust removal pipe is connected to the dust extraction device and the other end extends to the top of the dust collection drawer.

14. The valve bag packaging machine according to claim 1, characterized in that: It also includes a sliding structure, which is arranged on the weighing frame. The two sub-boxes are both arranged on the sliding structure and are slidably matched with the weighing frame through the sliding structure.

15. The valve bag packaging machine according to claim 14, characterized in that: The sliding structure includes two slide rail assemblies and a plurality of rollers. The two slide rail assemblies are relatively arranged on the weighing frame and correspond to the opposite ends of the box body respectively. Each of the slide rail assemblies includes at least one slide rail. At least one roller is rotatably provided on the opposite ends of each sub-box body respectively. Each of the rollers is mounted on the corresponding slide rail and slidably cooperates with the corresponding slide rail.

16. The valve bag packaging machine according to claim 1, characterized in that: It also includes two limiting structures, which are both arranged on the main frame and located on two opposite sides of the box body, respectively, and are used to limit the positions of the two sub-box bodies when the two sub-box bodies move away from each other.

17. The valve bag packaging machine according to claim 16, characterized in that: The limiting structure comprises a limiting plate, a limiting column extending toward the box body is formed on a side of the limiting plate close to the box body, and an elastic member is sleeved on one end of the limiting column away from the limiting plate.

18. The valve bag packaging machine according to claim 17, characterized in that: The elastic member is slidably matched with the limiting column, a buffer spring is sleeved on the limiting column, and opposite ends of the buffer spring are respectively in contact with the elastic member and the limiting plate.

19. The valve bag packaging machine according to claim 1, characterized in that: It also includes a control box arranged on the main frame, a touch screen is arranged on the outer wall of the control box, the controller is arranged in the control box, and the touch screen is communicatively connected to the controller.

20. The valve bag packaging machine according to claim 1, characterized in that: It also includes a vacuum pressure gauge, which is arranged on one of the sub-boxes.

21. The valve bag packaging machine according to claim 1, characterized in that: Each of the sub-boxes is provided with at least one observation window.

22. A valve bag packaging method, characterized in that: A controller for a valve bag packaging machine according to any one of claims 1 to 21, comprising: After the valve port of the valve bag is manually sleeved on the end of the material transport pipe, the switch device is controlled to drive the two sub-boxes to move toward each other until they are docked, so that the two sub-boxes are enclosed to form a vacuum chamber, and the valve bag and the ends of the material transport pipe and the vacuum tube are accommodated in the vacuum chamber; Controlling the vacuum device to evacuate the vacuum chamber, and opening the material storage device, so that the material in the material storage device is sucked into the valve bag through the material transport pipe; When the weight information detected by the weighing sensor reaches a preset weight threshold, the material storage device is controlled to be closed, and the vacuum device is controlled to break the vacuum in the vacuum chamber; The switch device is controlled to drive the two sub-boxes to move away from each other, so that the valve bag containing the material can be manually taken away.

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