High-precision packaging machine facilitating exhausting

Abstract

The utility model provides a high-precision packaging machine facilitating exhaust, which relates to the technical field of packaging equipment and comprises a rack, a hopper is fixed at the top end of the rack, and a star valve is mounted at an opening in the bottom of the hopper; a feeding screw is further arranged on the machine frame, one end of the feeding screw is communicated with the star valve, a pneumatic butterfly valve is installed at the other end of the feeding screw, and a discharging pipe is installed at the other end of the pneumatic butterfly valve. And a variable-frequency dust removal device is further arranged on the rack and is in soft communication with the discharging pipe. The star valve is additionally arranged between the bottom of the hopper and the opening of the feeding screw, materials with good fluidity are precisely fed and prevented from entering the discharging pipe from the gap of the feeding screw, the precision of the feeding amount of the materials in the packaging bag is improved, the air pressure in the packaging bag can be balanced by arranging the variable-frequency dust removal device, and the packaging efficiency is improved. Therefore, mixing of materials and air is reduced, and the requirement for the packaging vacuum degree is met.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a packaging machine with high precision and beneficial to exhaust air. Background Art

[0002] For traditional non-gaseous powder packaging machines, during the feeding process, it is necessary to intermittently open the dust removal device to balance the air pressure in the packaging bag. However, when packaging finer powders, if the dust removal device is opened intermittently, the original gas in the bag will be mixed with the powder. After the packaging bag is processed by vacuum heat sealing, there is still gas in the packaging bag, resulting in the non-compliance of the packaging vacuum degree. In addition, for materials with better fluidity, even when the feeding screw is not opened, some materials will still enter the packaging bag under the action of gravity, resulting in low accuracy of the material feeding amount and seriously affecting the packaging effect. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a packaging machine with high precision and beneficial to exhaust air to solve the technical problems of non-compliance of the packaging vacuum degree and low accuracy of the material feeding amount in the prior art.

[0004] To achieve the above object, the utility model provides the following technical solution: A packaging machine with high precision and beneficial to exhaust air, including a frame, a hopper is fixed at the top of the frame, and a star valve is installed at the opening at the bottom of the hopper; a feeding screw is also arranged on the frame, one end of the feeding screw is communicated with the star valve, the other end of the feeding screw is installed with a pneumatic butterfly valve, and the other end of the pneumatic butterfly valve is installed with a feeding pipe; a variable frequency dust removal device is also arranged on the frame, and the variable frequency dust removal device is communicated with the feeding pipe.

[0005] Preferably, a motor is also arranged on the frame, and one end of the motor is connected with the star valve through a transmission device.

[0006] Preferably, it further includes a control cabinet, the control cabinet is connected with the motor through a cable, and a program for controlling the star valve is arranged in the control cabinet.

[0007] Preferably, the feeding screw includes a large screw and a small screw.

[0008] Preferably, a weighing device is arranged directly below the feeding pipe.

[0009] Preferably, a plurality of hooks are arranged on the frame, and the hooks are evenly distributed around the feeding pipe.

[0010] Preferably, an automatic pallet warehouse is also arranged on one side of the frame.

[0011] Preferably, the variable frequency dust removal device is flexibly connected with the feeding pipe through a dust removal pipeline.

[0012] Preferably, the feeding end of the feeding screw is flexibly connected to the star valve through a flexible pipe.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] (1) The present utility model provides a packaging machine with high precision and beneficial for exhaust. By adding a star valve between the bottom of the hopper and the opening of the feeding screw, precise feeding of materials with good fluidity is carried out, preventing the materials with good fluidity from entering the feeding pipe through the gaps of the feeding screw, thereby improving the precision of the material feeding amount in the packaging bag.

[0015] (2) The present utility model provides a packaging machine with high precision and beneficial for exhaust. By setting a variable-frequency dust removal device, the fan frequency of the variable-frequency dust removal device can be adjusted according to the actual characteristics of the materials, continuously extracting the air in the bag, thereby greatly reducing the mixture of materials and air, meeting the requirements of packaging vacuum degree, and further improving the packaging quality of the product.

[0016] (3) The present utility model provides a packaging machine with high precision and beneficial for exhaust. By alternately closing and opening the large screw and the small screw, fast feeding, slow feeding, and precise feeding are carried out, thereby realizing three-stage speed feeding of the feeding screw and improving the precision of the material feeding amount of the packaging machine.

[0017] (4) The present utility model provides a packaging machine with high precision and beneficial for exhaust. When the materials in the packaging bag reach the weighing precision, by locking the pneumatic butterfly valve, preventing the residual materials in the feeding screw from entering the packaging bag, thereby improving the precision of the material feeding amount again. Description of the Drawings

[0018] Figure 1 It is the front view of the embodiment in the present utility model (the pallet rack is not shown);

[0019] Figure 2 It is the left view of the embodiment in the present utility model.

[0020] In the figure: 1, frame; 2, hopper; 3, star valve; 4, motor; 5, control cabinet; 6, feeding screw; 61, large screw; 62, small screw; 7, variable-frequency dust removal device; 8, dust removal pipeline; 9, pneumatic butterfly valve; 10, feeding pipe; 11, hook; 12, weighing device; 13, automatic pallet library. Detailed Embodiments

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by this application.

[0022] As shown in Figure 1-2 , a packaging machine with high precision and beneficial for exhaust includes a frame 1. A hopper 2 is fixed at the top of the frame 1, and a star valve 3 is installed at the bottom opening of the hopper 2. A feeding screw 6 is also arranged on the frame 1. One end of the feeding screw 6 is connected to the star valve 3 through a flexible pipe, and the other end of the feeding screw 6 is installed with a pneumatic butterfly valve 9. The other end of the pneumatic butterfly valve 9 is installed with a blanking pipe 10. When the star valve 3 and the pneumatic butterfly valve 9 are opened, the materials in the hopper 2 pass through the feeding screw 6 to the blanking pipe 10 for bagging and packing. If the star valve 3 is not installed, even if the feeding screw 6 is closed, the materials with better fluidity will enter the blanking pipe 10 from the gaps of the feeding screw 6, thus affecting the feeding accuracy of the materials. By arranging the star valve 3 between the bottom opening of the hopper 2 and the feeding screw 6, it can prevent the materials with better fluidity from entering the blanking pipe 10 through the gaps of the feeding screw 6, thereby improving the accuracy of the material feeding amount in the packaging bag. A variable-frequency dust removal device 7 is also arranged on the frame 1. The variable-frequency dust removal device 7 is flexibly connected to the blanking pipe 10 through a dust removal pipe 8. The fan frequency of the variable-frequency dust removal device 7 can be adjusted according to the actual characteristics of the materials to continuously extract the air in the bag, thereby greatly reducing the mixture of materials and air, meeting the requirements of the packaging vacuum degree, and further improving the packaging quality of the products.

[0023] As a further improvement, please refer to Figure 1 , a motor 4 is also arranged on the frame 1. One end of the motor 4 is connected to the star valve 3 through a transmission device. The motor 4 is connected to a control cabinet 5 through a cable. A program for controlling the star valve 3 is set in the control cabinet 5 to control the opening and closing of the star valve 3.

[0024] As a further improvement, please refer to Figure 1 , four hooks 11 are also arranged on the frame 1. The hooks 11 are evenly distributed around the blanking pipe 10 for hanging packaging bags. A weighing device 12 is also arranged at the bottom end of the frame 1. The weighing device 12 is electrically connected to the control cabinet 5. During use, when the materials in the packaging bag reach the weighing accuracy, the pneumatic butterfly valve 9 is locked to prevent the residual materials in the feeding screw 6 from entering the packaging bag, further improving the accuracy of the material feeding amount. Please refer to Figure 2 , an automatic pallet warehouse 13 is also arranged on one side of the frame 1. The automatic pallet warehouse 13 is electrically connected to the control cabinet 5 and is used to control the automatic pallet warehouse 13 to convey the packaged products.

[0025] For a further improvement, please refer to Figure 1 , the feeding screw 6 includes a large screw 61 and a small screw 62. The large screw 61 and the small screw 62 are electrically connected to the control cabinet 5 respectively. The control cabinet 5 controls the closing and opening of the large screw 61 and the small screw 62, and fast feeding, slow feeding, and precise feeding are carried out in sequence to realize the three-stage speed feeding of the feeding screw 6, thereby improving the accuracy of the material feeding amount of the packaging machine. When in use, taking a 1-ton model packaging machine as an example, the worker hangs the packaging bag on the four hooks 11, and the bottom of the packaging bag is placed on the weighing device 12. The control cabinet 5 starts the large screw 61 to start fast feeding. When the weighing reaches 800 - 900 kg (which can be adjusted according to the material characteristics), the control cabinet 5 closes the large screw 61 according to the weighing value fed back by the weighing device 12 and starts the small screw 62 to start slow feeding. When the weighing reaches 950 - 980 kg (which can be adjusted according to the material characteristics), precise feeding starts. The feeding screw 6 used is still the slow-feeding small screw 62, but the feeding method is changed from the approaching method to the quantitative method, that is, from the continuous feeding method to making the small screw 62 rotate a fixed number of turns, and then waiting for 10 - 20 seconds (which can be adjusted according to the material characteristics). After the reading of the weighing device 12 is stable, it is fed back to the control cabinet 5 to determine whether the set weight is reached. If the weighing does not reach the set weight, the small screw 62 continues to rotate a fixed number of turns for precise feeding, and then waits for 10 - 20 seconds (which can be adjusted according to the material characteristics) to ensure the stability of the reading of the weighing device 12. Repeat the above actions until the weighing reaches the set weight, and then close the valve of the blanking pipe 10.

[0026] It should be noted that in the description of the present invention, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those skilled in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several equivalent substitutions or obvious modifications can be made, and if the performance or use is the same, they should all be regarded as falling within the protection scope of the present utility model.

Claims

1. A packaging machine with high precision and conducive to exhaust, characterized by: It includes a frame, a hopper is fixed on the top of the frame, and a star valve is installed at the bottom opening of the hopper; a feeding screw is also arranged on the frame, one end of the feeding screw is connected with the star valve, a pneumatic butterfly valve is installed on the other end of the feeding screw, and a discharge pipe is installed on the other end of the pneumatic butterfly valve; a variable frequency dust removal device is also arranged on the frame, and the variable frequency dust removal device is connected with the discharge pipe.

2. A packaging machine with high precision and conducive to exhaust according to claim 1, characterized in that: The frame is also provided with a motor, one end of which is connected to the star valve through a transmission device.

3. A packaging machine with high precision and conducive to exhaust according to claim 2, characterized in that: The invention also comprises a control cabinet, wherein the control cabinet is connected to the motor via a cable, and a program for controlling the star valve is arranged in the control cabinet.

4. A packaging machine with high precision and conducive to exhaust according to claim 1, characterized in that: The feeding screw comprises a large screw and a small screw.

5. A packaging machine with high precision and good exhaust performance according to claim 1, characterized in that: A weighing device is arranged directly below the feeding pipe.

6. A packaging machine with high precision and good exhaust performance according to claim 1, characterized in that: The frame is provided with a plurality of hooks, which are evenly distributed on the periphery of the feeding pipe.

7. A packaging machine with high precision and good exhaust performance according to claim 1, characterized in that: An automatic pallet warehouse is also arranged on one side of the frame.

8. A packaging machine with high precision and good exhaust performance according to claim 1, characterized in that: The variable frequency dust removal device is softly connected to the feeding pipe through a dust removal pipeline.

9. A packaging machine with high precision and good exhaust function according to claim 1, characterized in that: The feeding end of the feeding screw is softly connected to the star valve through a soft pipe.

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