Liquid carton packaging machine discharging and nitrogen charging device and liquid carton packaging machine

Abstract

A liquid strip package discharging and nitrogen filling device and a liquid strip package machine are disclosed, the liquid strip package discharging and nitrogen filling device comprises a rack and one or more discharging and nitrogen filling modules, each discharging and nitrogen filling module comprises a strip package forming pipe, a discharging unit and a nitrogen filling unit, and the strip package forming pipe is used for assisting strip package forming; the discharging unit comprises a discharging pipe and a material conveying pipe, the discharging pipe is arranged in the carton forming pipe in a penetrating mode, the lower end of the discharging pipe extends out of the carton forming pipe, and the upper end of the discharging pipe communicates with the material conveying pipe; the nitrogen charging unit comprises a nitrogen charging pipe and a nitrogen conveying pipe, the nitrogen charging pipe is arranged in the carton forming pipe in a penetrating mode and arranged outside the discharging pipe in a sleeving mode, the upper portion of the nitrogen charging pipe extends out of the carton forming pipe and is communicated with the nitrogen conveying pipe, the lower end of the nitrogen charging pipe extends to the discharging pipe, and nitrogen enters from a gap reserved between the nitrogen charging pipe and the discharging pipe; and air is discharged from a gap reserved between the nitrogen charging pipe and the carton forming pipe. The nitrogen charging and discharging device can achieve nitrogen charging and discharging operation of a plurality of liquid strip packages, and is compact in structure, convenient to install and maintain and suitable for production of various liquid strip packages.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a liquid strip packing feeding and nitrogen filling device and a liquid strip packing machine. Background Technology

[0002] To improve product quality, nitrogen filling is increasingly being used in product packaging, especially for products that are difficult to vacuum-pack for preservation, such as powdered products, liquid products, and fragile puffed foods. Nitrogen filling can slow down the oxidation and spoilage process of the product and resist external pressure, allowing it to maintain its original shape. However, because nitrogen filling increases equipment complexity and cost, it is generally used for packaging larger-volume products. Strip packaging machines can be used for packaging powdered and liquid materials, and are generally smaller in size. Currently, nitrogen filling is less common in these machines, and even when they are used, it is mostly for packaging powdered strips with strict quality requirements. Liquid strip packaging is rarely used, and there is a lack of corresponding nitrogen filling equipment for such packaging. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liquid strip pack feeding and nitrogen filling device, as well as a liquid strip pack machine using the device, which can be used for nitrogen filling operations of liquid strip packs.

[0004] This utility model is achieved through the following technical solution:

[0005] A liquid strip bag feeding and nitrogen filling device includes a frame and one or more feeding and nitrogen filling modules mounted on the frame. Each feeding and nitrogen filling module includes a strip bag forming tube, a feeding unit, and a nitrogen filling unit. The strip bag forming tube is vertically arranged and is used to cooperate with the longitudinal sealing mechanism and the transverse sealing mechanism of the strip bag to assist in the forming of the strip bag. The feeding unit includes a feeding pipe and a material conveying pipe. The feeding pipe passes through the strip bag forming tube, with its lower end extending out of the strip bag forming tube and its upper end connected to the material conveying pipe, which is connected to a material tank. Used for conveying liquid materials; the nitrogen filling unit includes a nitrogen filling pipe and a nitrogen conveying pipe. The nitrogen filling pipe passes through the strip forming pipe and is sleeved outside the discharge pipe. The upper part of the nitrogen filling pipe extends out of the strip forming pipe and is connected to the nitrogen conveying pipe. The nitrogen conveying pipe is connected to the nitrogen conveying device, and its lower end extends to the discharge pipe. A gap is left between the nitrogen filling pipe and the discharge pipe to allow nitrogen to enter. A gap is left between the nitrogen filling pipe and the strip forming pipe to allow air to escape. The upper part of the nitrogen filling pipe is sealed to the strip forming pipe, and the upper part of the discharge pipe is sealed to the nitrogen filling pipe.

[0006] Furthermore, the lower end of the nitrogen filling tube extends to the lower end of the feeding tube.

[0007] Furthermore, an exhaust port for air discharge is provided at the upper part of the strip-shaped tube. The exhaust port is connected to an exhaust pipe, and a one-way valve is provided on the exhaust pipe to allow air to be discharged but not to allow external air to enter.

[0008] Furthermore, the upper end of the feed pipe extends through the upper end of the nitrogen filling pipe and is then connected to the material conveying pipe.

[0009] Furthermore, a flow meter is installed on the nitrogen delivery pipe to control the flow rate of nitrogen.

[0010] Furthermore, it also includes a mounting plate on which flow meters on each nitrogen delivery pipe are mounted side by side.

[0011] Furthermore, it also includes a nitrogen main pipe, an inlet solenoid valve, and a pressure reducing valve. The nitrogen main pipe is connected to the nitrogen delivery pipes on each feeding and filling nitrogen module, and the nitrogen main pipe is connected to a gas storage tank. The pressure reducing valve and the inlet solenoid valve are arranged sequentially on the nitrogen main pipe in the direction of airflow. The inlet solenoid valve is used to control the input of nitrogen, and the pressure reducing valve is used to adjust the pressure of the nitrogen input.

[0012] Furthermore, the nitrogen main pipe is located above or below each nitrogen delivery pipe. After the nitrogen delivery pipe extends out of the outside of the mounting plate, it then winds back up or down to the inside of the mounting plate and connects to the nitrogen main pipe. A flow meter is installed on the part of the nitrogen delivery pipe that extends out of the mounting plate, and the flow meter is fixed on the mounting plate.

[0013] Furthermore, the feeding and nitrogen filling module has six groups arranged side by side.

[0014] A liquid strip packaging machine includes the aforementioned liquid strip packaging feeding and nitrogen filling device, and further includes a collar forming device and a longitudinal sealing mechanism arranged sequentially from top to bottom. The upper end of the strip packaging forming tube passes through the collar forming device, and the lower end of the strip packaging forming tube passes through the longitudinal sealing mechanism.

[0015] This invention utilizes a three-layer structure: a strip forming tube, a feeding tube, and a nitrogen filling tube, arranged sequentially from the inside out. The innermost space, formed by the feeding tube, is used for filling liquid materials. The middle annular space is the channel for nitrogen entry, and the outermost annular space is the channel for air exit. After nitrogen enters the bottom of the strip, it gradually exhausts air from bottom to top. Because the bottom of the nitrogen filling tube is flush with the bottom of the feeding tube, it does not come into contact with the liquid material in the strip as it moves downward. This prevents liquid material from splashing due to nitrogen introduction during the filling process and avoids liquid material residue on the filling tube, thus ensuring the sealing of the liquid strip. Nitrogen filling of liquid strips is achieved without affecting strip production. The layout of components such as the nitrogen delivery pipe, nitrogen main pipe, and flow meter makes the overall structure compact, allowing for multiple feeding and nitrogen filling modules to be installed simultaneously, producing multiple rows of strips. Installation and maintenance are convenient, making it suitable for the production of various liquid strips and widely applicable. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of the present utility model.

[0018] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0019] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0020] Figure 5 for Figure 3 Enlarged view of the structure at point B.

[0021] Figure 6 for Figure 3 Enlarged view of the structure at point C.

[0022] Figure 7 for Figure 3 Enlarged view of part of the structure.

[0023] Figure 8 This is a schematic diagram of the structure of the liquid strip packaging machine according to an embodiment of the present invention.

[0024] Figure 9 This is a structural schematic diagram of the liquid strip packaging machine from another perspective, representing an embodiment of this utility model.

[0025] Figure 10 This is a cross-sectional view of the liquid strip packaging machine according to an embodiment of the present invention.

[0026] Reference numerals in the attached diagram: 1-Frame; 2-Strip forming tube; 3-Nitrogen filling tube; 4-Discharge tube; 5-Material conveying tube; 6-Nitrogen conveying tube; 7-Flow meter; 8-Main nitrogen pipe; 9-Inlet solenoid valve; 10-Pressure reducing valve; 11-Strip; 12-Mounting plate; 13-Exhaust pipe; 100-Discharge and nitrogen filling device; 200-Loop forming device; 300-Longitudinal sealing mechanism; 301-Drive module; 302-Heating module. Detailed Implementation

[0027] A liquid strip package feeding and nitrogen filling device 100, such as Figures 1 to 3 As shown, the machine includes a frame 1 and one or more feeding and nitrogen-filling modules mounted on the frame 1. In this embodiment, there are six groups of feeding and nitrogen-filling modules arranged side by side, which can simultaneously package six rows of strip packages 11. The number of feeding and nitrogen-filling modules can also be set as needed. Each feeding and nitrogen-filling module includes a strip package forming tube 2, a feeding unit, and a nitrogen-filling unit. The strip package forming tube 2 is vertically arranged and is used to flip the packaging film, guide the packaging film to form the shape of a strip package, and then cooperate with the longitudinal sealing mechanism 300 and the transverse sealing mechanism of the strip package machine to assist in the forming of the strip package 11.

[0028] The feeding unit includes a feeding pipe 4 and a material conveying pipe 5. The feeding pipe 4 passes through the strip forming pipe 2, such as... Figure 7 And its lower end extends into a strip-shaped tube 2, such as Figure 4 Its upper end is connected to the material conveying pipe 5, which is connected to the material tank, and is used to fill the material into the formed strip package 11. The nitrogen filling unit includes a nitrogen filling pipe 3 and a nitrogen conveying pipe 6. The nitrogen filling pipe 3 passes through the strip package forming pipe 2 and is sleeved outside the feeding pipe 4. That is, the feeding pipe 4, the nitrogen filling pipe 3, and the strip package forming pipe 2 are sleeved from the inside to the outside. Figure 6 This forms a three-layered space; such as Figure 5 The upper part of the nitrogen filling pipe 3 extends out of the strip forming pipe 2 and is connected to the nitrogen conveying pipe 6. The nitrogen conveying pipe 6 is connected to the nitrogen conveying device. A gap is left between the nitrogen filling pipe 3 and the feeding pipe 4 to allow nitrogen to enter. Nitrogen enters the strip 11 through the gap between the feeding pipe 4 and the nitrogen filling pipe 3. A gap is left between the nitrogen filling pipe 3 and the strip forming pipe 2 to allow air to escape. The air in the strip 11 is discharged from the strip 11 through the gap between the nitrogen filling pipe 3 and the strip forming pipe 2. The upper part of the nitrogen filling pipe 3 and the strip forming pipe 2 are sealed together. The upper part of the feeding pipe 4 and the nitrogen filling pipe 3 are sealed together.

[0029] As one implementation method, in this embodiment, such as Figure 7The lower end of the nitrogen filling pipe 3 extends to the lower end of the feeding pipe 4. After the feeding pipe 4 is filled with material, the strip bag will move downward under the traction of the horizontal sealing mechanism of the strip bag machine. The feeding pipe 4 and the nitrogen filling pipe 3 will be separated from the liquid material and located at the bottom of the air part of the strip bag. At this time, nitrogen gas is introduced, and the nitrogen gas will squeeze the air out of the strip bag from bottom to top, thus achieving effective nitrogen filling.

[0030] In this embodiment, as Figure 5 An exhaust port for air discharge is provided at the upper part of the strip forming tube 2. The exhaust port is connected to an exhaust pipe 13. The exhaust pipe 13 is equipped with a one-way valve, which only allows air to be discharged and does not allow external air to enter.

[0031] In this embodiment, as Figure 4 The upper end of the feeding pipe 4 extends through the upper end of the nitrogen filling pipe 3 and is then connected to the material conveying pipe 5. That is, the upper ends of the strip forming pipe 2, the nitrogen filling pipe 3, and the feeding pipe 4 rise in sequence to facilitate connection of the gas source and the material.

[0032] This embodiment also includes a nitrogen main pipe 8, an inlet solenoid valve 9, and a pressure reducing valve 10. The nitrogen main pipe 8 is connected to the nitrogen delivery pipes 6 on each feeding and nitrogen filling module. The nitrogen main pipe 8 is connected to a gas storage tank. The pressure reducing valve 10 and the inlet solenoid valve 9 are arranged sequentially on the nitrogen main pipe 8 in the direction of airflow. The inlet solenoid valve 9 is used to control the input of nitrogen and is the main switch for nitrogen access. The pressure reducing valve 10 is used to adjust the pressure of nitrogen input.

[0033] For a more rational structural layout, the nitrogen main pipe 8 can be positioned above or below each nitrogen delivery pipe 6. The nitrogen delivery pipes 6 extend outwards from the mounting plate 12 and then loop back upwards or downwards to connect with the nitrogen main pipe 8. A flow meter 7 is installed on the portion of the nitrogen delivery pipe 6 extending outwards from the mounting plate 12, and is fixed to the mounting plate 12 to control the flow rate of each nitrogen supply. The flow meters 7 are installed side-by-side on the mounting plate 12 for easy monitoring. In this embodiment, the nitrogen main pipe 8 is positioned below each nitrogen delivery pipe 6, with the six nitrogen delivery pipes 6 arranged horizontally in parallel, and the six flow meters 7 arranged on the mounting plate 12, resulting in a compact overall layout.

[0034] A liquid strip packaging machine, such as Figures 8 to 10 As shown, the device includes the aforementioned liquid strip pack feeding and nitrogen filling device 100, and also includes a lapel forming device 200 and a longitudinal sealing mechanism 300 arranged sequentially from top to bottom. The upper end of the strip pack forming tube 2 passes through the lapel forming device 200, and the lower end of the strip pack forming tube 2 passes through the longitudinal sealing mechanism 300. The longitudinal sealing mechanism 300 is equipped with a heating module 302 and a driving module 301. The heating module 302 is used to heat the heat sealing blocks, and the driving module 301 drives the two heat sealing blocks to approach each other. The driving module 301 can be a ball screw module.

[0035] The working principle of the liquid strip packaging machine feeding and nitrogen filling device 100 in this embodiment is as follows: the strip packaging film is formed by the strip forming tube 2 and the longitudinal sealing mechanism 300, and after being sealed at the bottom by the transverse sealing mechanism, the liquid to be filled enters the feeding tube 4 through the material conveying tube 5, filling the liquid material into the strip. After filling is completed, the nitrogen inlet solenoid valve 9 is opened, and the nitrogen enters the nitrogen filling tube 3 through the nitrogen conveying tube 6 via the flow meter 7. The nitrogen enters the bottom of the strip through the gap between the feeding tube 4 and the nitrogen filling tube 3. The air in the strip is squeezed out from the bottom to the top by the nitrogen and discharged from the exhaust port. The nitrogen fills the strip filled with liquid material, and the nitrogen filling is completed.

[0036] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. A liquid strip pack dispensing nitrogen filling device, characterized in that, The device includes a frame and one or more feeding and nitrogen-filling modules mounted on the frame. Each feeding and nitrogen-filling module includes a strip-forming tube, a feeding unit, and a nitrogen-filling unit. The strip-forming tube is vertically arranged to assist in the forming of strips. The feeding unit includes a feeding tube and a material conveying tube. The feeding tube passes through the strip-forming tube and extends out of the strip-forming tube at its lower end. Its upper end is connected to the material conveying tube for conveying liquid materials. The nitrogen-filling unit includes a nitrogen-filling tube and a nitrogen conveying tube. The nitrogen-filling tube passes through the strip-forming tube and is sleeved outside the feeding tube. The upper part of the nitrogen-filling tube extends out of the strip-forming tube and is connected to the nitrogen conveying tube. A gap is left between the nitrogen-filling tube and the feeding tube to allow nitrogen to enter. A gap is left between the nitrogen-filling tube and the strip-forming tube to allow air to escape. The upper parts of the nitrogen-filling tube and the strip-forming tube are sealed together, and the upper parts of the feeding tube and the nitrogen-filling tube are sealed together.

2. The liquid strip pack nitrogen charging device according to claim 1, characterized in that, The lower end of the nitrogen filling tube extends to the lower end of the feeding tube.

3. The liquid strip pack nitrogen charging device according to claim 1, characterized in that, An exhaust port for air discharge is provided at the upper part of the strip-shaped tube. The exhaust port is connected to an exhaust pipe, and the exhaust pipe is equipped with a one-way valve that only allows air to be discharged.

4. The liquid strip pack nitrogen charging device according to claim 1, characterized in that, The upper end of the feed pipe extends through the upper end of the nitrogen filling pipe and is then connected to the material conveying pipe.

5. The liquid strip pack nitrogen charging device according to claim 1, wherein, A flow meter is installed on the nitrogen delivery pipe to control the flow rate of nitrogen.

6. The liquid bar pack underfill nitrogen charging apparatus of claim 5, wherein, It also includes a mounting plate on which flow meters on each nitrogen delivery pipe are mounted side by side.

7. The liquid strip pack nitrogen charging device according to claim 1, wherein, It also includes a nitrogen main pipe, an intake solenoid valve, and a pressure reducing valve. The nitrogen main pipe is connected to the nitrogen delivery pipe on each nitrogen filling unit. The pressure reducing valve and the intake solenoid valve are arranged sequentially on the nitrogen main pipe in the direction of airflow. The intake solenoid valve is used to control the input of nitrogen, and the pressure reducing valve is used to adjust the pressure of the nitrogen input.

8. The liquid bar pack underfill nitrogen charging apparatus of claim 7, wherein, The nitrogen main pipe is located above or below each nitrogen delivery pipe. After the nitrogen delivery pipe extends out of the outside of the mounting plate, it goes up or down back to the inside of the mounting plate and connects to the nitrogen main pipe. A flow meter is installed on the part of the nitrogen delivery pipe that extends out of the mounting plate, and the flow meter is fixed on the mounting plate.

9. The liquid strip pack nitrogen charging device according to claim 1, wherein, The feeding and nitrogen filling modules consist of six groups arranged side by side.

10. A liquid bar packer characterized by, The device includes a liquid strip pack feeding and nitrogen filling device as described in any one of claims 1 to 9, and further includes a collar forming device and a longitudinal sealing mechanism arranged sequentially from top to bottom, wherein the upper end of the strip pack forming tube passes through the collar forming device and the lower end of the strip pack forming tube passes through the longitudinal sealing mechanism.

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