Liquid multi-column packaging machine and liquid multi-column packaging process based on rolling liquid discharge

Abstract

The invention relates to the field of multi-column packaging machines, in particular to a liquid multi-column packaging machine based on rolling liquid drainage and a liquid multi-column packaging technology. The rolling unit comprises a rotating ring, an annular film, a driving unit and a supporting column; the two rotating rings are coaxially arranged, and a gap exists between the two rotating rings; the annular film is arranged at the gap in the axis direction of the rotating rings, the two ends of the annular film are fixedly connected with the two rotating rings respectively, and the annular film has elasticity; the driving unit is arranged on one side of the two rotating rings; the supporting column penetrates through one sides of the two rotating rings along the axes of the rotating rings, the two rotating rings, the annular film and the supporting column jointly form an inflation cavity, a first vent groove communicating with the inflation cavity is formed in the supporting column, and a first air pump communicating with the first vent groove is arranged on one side of the supporting column. According to the invention, collaborative optimization of traction stability and defoaming effect is realized, and the residual quantity of bubbles in the bag is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of multi-row packaging machines, specifically to a liquid multi-row packaging machine and liquid multi-row packaging process based on roller pressure drainage. Background Technology

[0002] Existing multi-row packaging machines can be divided into liquid type and powder type according to the different products they produce. Liquid type can be further divided into low viscosity fluid (such as water), high viscosity paste (such as honey), and fluid containing particles (such as jam) according to its flowability. Roller pressing and draining is an important step in liquid multi-row packaging machines, which can restrict the shape of the packaging bag through roller pressing and draining.

[0003] Chinese Patent Publication No. CN110203466B discloses a fully automatic liquid multi-row packaging machine, including a first heat-sealing mechanism, a base, a packaging mechanism, and a frame. The base is installed at the bottom of the frame, and a conveyor belt is installed on the base. A first servo motor is installed at one end of the conveyor belt, and the output end of the first servo motor is fixedly connected to the conveyor belt through a rotating shaft. A control box is installed on one side of the frame, and a touch screen is installed on the top of one end of the control box. A button panel is installed at one end of the control box. A box is fixed to the top of one side of the frame, and a stirring roller shaft is vertically fixed inside the box. A third drive motor is installed at the top of the box, and the output end of the third drive motor is fixedly connected to the top of the stirring roller shaft through a rotating shaft. A feeding port is installed on one side of the top of the box. A feeding pump is installed below the box, and the input end of the feeding pump is connected to the bottom of the box through a conduit. A guide pipe is installed at the output end of the feeding pump, and a flow control valve is installed on the guide pipe. A warping roller shaft is fixed to one end of the top of the frame through a second fixing bracket.

[0004] The above solution provides a fully automatic multi-row liquid packaging machine, but it does not optimize the roller-pressure drainage mechanism. While the roller-pressure drainage mechanism not only restricts the shape of the outer packaging bag but also provides traction, the fixed shape of the pressure rollers means the contact area between the mechanism and the outer packaging bag is only affected by the bag's shape, leading to slippage during traction. Furthermore, the roller-pressure drainage mechanism generates a triangular pressure field when squeezing the outer packaging bag, causing air bubbles in the liquid to migrate to the low-pressure area (the area closest to the two pressure rollers). However, a small number of air bubbles still remain. Vibrating the pressure rollers could significantly reduce this, but the rollers cannot vibrate during the squeezing process; otherwise, they cannot rotate stably. Therefore, current technology cannot improve the air bubble removal effect. Summary of the Invention

[0005] To address the aforementioned issues, a liquid multi-row packaging machine and process based on roller-pressed liquid drainage are provided. By utilizing the deformation adaptability of the elastic annular film and the outer wall pattern design, the contact area and friction coefficient between the roller pressing unit and the packaging bag are increased. This solves the traction slippage problem caused by the unstable contact area of ​​traditional fixed-shape pressure rollers, ensuring synchronized speed and accurate positioning of multi-row packaging bags during conveying, and reducing quality defects such as sealing misalignment and bag stretching deformation. Simultaneously, the reciprocating extension and retraction of the striking column driven by a second air pump allows vibration energy to be directionally transmitted to the packaging bag through the annular film. This breaks the adhesion between micro-bubbles and the liquid and bag wall, promoting bubble aggregation, migration, and discharge, while the elastic buffer of the annular film prevents vibration from being transmitted to the rotating ring.

[0006] To address the problems of existing technologies, this invention provides a liquid multi-row packaging machine based on roller-pressed liquid discharge, including a roller-pressed liquid discharge mechanism. The roller-pressed liquid discharge mechanism includes two roller pressing units that press both sides of the packaging bag. Each roller pressing unit includes a rotating ring, an annular film, a drive unit, and a support column. Two rotating rings are arranged coaxially with a gap between them. The annular film is positioned in the gap along the axial direction of the rotating rings, and its two ends are fixedly connected to the two rotating rings respectively. The annular film is elastic. The drive unit is located on one side of the two rotating rings and drives them to rotate synchronously. The support column passes through one side of the two rotating rings along their axial direction. The rotating rings and the support column rotate in coordination. The two rotating rings, the annular film, and the support column together form an inflation chamber. A first ventilation groove communicating with the inflation chamber is formed inside the support column, and a first air pump communicating with the first ventilation groove is located on one side of the support column.

[0007] Preferably, the rolling unit further includes a second venting groove, a second air pump, an extension sleeve, and a striking post; the second venting groove is opened inside the support column and located on one side of the first venting groove; the second air pump is disposed on one side of the support column and communicates with the second venting groove; the extension sleeve is disposed on the support column along the radial direction of the support column, the extension sleeve communicates with the second venting groove, and the extension sleeve is located between the two rotating rings; the striking post is slidably disposed in the extension sleeve along the extension direction of the extension sleeve.

[0008] Preferably, a pressure sensor for detecting the air pressure inside the first ventilation slot is provided between the first ventilation slot and the first air pump.

[0009] Preferably, patterns are formed on the outer wall of the annular membrane.

[0010] Preferably, a striking roller is rotatably provided at the end of the striking column away from the extension sleeve, and the axis of the striking roller is parallel to the axis of the annular membrane.

[0011] Preferably, the rolling unit further includes a sealing groove and a sealing ring; multiple sealing grooves are provided at the ends of the two rotating rings that are far apart from each other, and the sealing grooves are nested from the inside to the outside at the ends of the rotating rings; two sealing rings are provided and are respectively fixed on the support column on the side of the two rotating rings that are far apart from each other, and multiple sealing protrusions are provided on the sealing rings that are engaged with the sealing grooves.

[0012] Preferably, the sealing protrusions are nested from the inside to the outside at the end of the sealing ring, and multiple balls distributed around the axis of the sealing ring are provided on the outermost sealing protrusion. The balls are rotatably mounted on the sealing protrusion and slide in contact with the sealing groove.

[0013] Preferably, the drive unit includes a belt drive assembly, a rotary driver, and a connecting shaft; two belt drive assemblies are provided and respectively disposed on two rotating rings; the rotary driver is disposed on one side of the belt drive assembly; the connecting shaft is connected to the two belt drive assemblies, the two belt drive assemblies rotate synchronously through the connecting shaft, and the rotary driver is used to drive the belt drive assembly and the connecting shaft to rotate.

[0014] Preferably, a guide frame is provided above the two roller pressing units to guide the packaging bags to descend.

[0015] This invention also relates to a liquid multi-row packaging process based on roller pressure drainage, employing a liquid multi-row packaging machine based on roller pressure drainage, the specific steps of which are as follows: S1. The packaging bag containing liquid is introduced between two roller pressing units. The first air pump inflates the inflation chamber through the first air groove. The annular film gradually expands and squeezes the packaging bag. The inflation stops after the air pressure in the inflation chamber reaches the rated value. S2. The drive unit drives the two rotating rings to rotate synchronously, and the annular film rolls and cooperates with the packaging bag to pull the packaging bag. S3. Under the reciprocating inflation and suction of the second air pump, the striking column can extend and retract within the extension sleeve. During the extension and retraction, the striking column strikes the annular membrane and indirectly transmits the impact to the packaging bag, causing air bubbles in the liquid inside the packaging bag to be expelled.

[0016] The advantages of this invention compared to the prior art are: 1. This invention improves the contact area and friction coefficient between the roller pressing unit and the packaging bag by utilizing the deformation adaptability of the elastic annular film and the outer wall pattern design. This solves the traction slippage problem caused by the unstable contact area of ​​traditional fixed-shape pressure rollers, ensuring that multiple rows of packaging bags are synchronized in speed and accurately positioned during the conveying process, and reducing quality defects such as sealing misalignment and bag stretching deformation. At the same time, by using the second air pump to drive the reciprocating extension and retraction of the striking column, the vibration energy is directionally transmitted to the packaging bag through the annular film. This breaks the adhesion between micro-bubbles and liquid and bag wall, promoting the aggregation and migration of bubbles, and the elastic buffer of the annular film prevents vibration from being transmitted to the rotating ring. This achieves synergistic optimization of traction stability and defoaming effect, and significantly reduces the amount of residual bubbles in the bag. 2. Through closed-loop control of the air pressure sensor and the first air pump, the air pressure of the inflation chamber can be adjusted according to the shaping requirements of packaging bags of different thicknesses. This allows the expansion degree of the annular film to flexibly adapt to various product specifications, enabling differentiated production without changing the pressure rollers and improving the equipment's versatility and production flexibility. At the same time, the air pressure self-tightening characteristic of the nested cooperation between the sealing groove and the sealing protrusion enhances the sealing effect as the inflation pressure increases. Combined with the adaptive air replenishment function of the first air pump, this effectively avoids the problem of clamping force attenuation caused by air leakage in the inflation chamber, ensuring that the shaping accuracy and traction stability of the packaging bag remain consistent throughout the roller pressing and draining process. 3. The synchronous drive structure formed by the belt drive assembly and the connecting shaft enables the two rotating rings to rotate at the same speed and in the same direction, avoiding damage to the annular film caused by torsion and ensuring the long-term stable operation of the mechanism. At the same time, the rolling contact design of the striking roller reduces the friction and wear between the striking column and the inner wall of the annular film, and the ball structure reduces the relative motion resistance between the sealing ring and the rotating ring, extending the service life of the core components. In addition, the precise guiding effect of the guide frame ensures that the packaging bag always enters the roller pressing area along the preset path, avoiding the problem of uneven clamping caused by deviation, and further improving the shape regularity and overall quality stability of the packaged products. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the roller pressure drainage mechanism in a liquid multi-row packaging machine based on roller pressure drainage according to the present invention; Figure 2 This invention relates to a liquid multi-row packaging machine based on roller pressure drainage. Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a partially cross-sectional three-dimensional schematic diagram of the roller pressure drainage mechanism in a liquid multi-row packaging machine based on roller pressure drainage according to the present invention; Figure 4 This is a three-dimensional schematic diagram of the roller pressure drainage mechanism in a multi-row liquid packaging machine based on roller pressure drainage according to the present invention, after the guide frame has been removed; Figure 5This invention relates to a liquid multi-row packaging machine based on roller pressure drainage. Figure 4 A magnified view of a portion of point B in the middle; Figure 6 This is a three-dimensional schematic diagram of the roller pressing unit of a liquid multi-row packaging machine based on roller pressing and draining according to the present invention; Figure 7 This is a partially sectional three-dimensional schematic diagram of the roller pressing unit of a liquid multi-row packaging machine based on roller pressing and draining according to the present invention; Figure 8 This invention relates to a liquid multi-row packaging machine based on roller pressure drainage. Figure 7 A magnified view of a portion of point C in the middle; Figure 9 This is an exploded three-dimensional schematic diagram of the roller pressing unit of a liquid multi-row packaging machine based on roller pressing and draining according to the present invention; Figure 10 This invention relates to a liquid multi-row packaging machine based on roller pressure drainage. Figure 9 A magnified view of a portion of point D.

[0018] The diagram is labeled as follows: 1. Roller pressing unit; 11. Rotating ring; 111. Sealing groove; 12. Annular membrane; 121. Pattern; 13. Drive unit; 131. Belt drive assembly; 1311. Synchronous belt; 1312. Synchronous pulley; 132. Rotary driver; 133. Connecting shaft; 14. Support column; 141. First venting groove; 142. Second venting groove; 15. Extension sleeve; 16. Striking column; 161. Striking roller; 17. Sealing ring; 171. Sealing protrusion; 172. Ball bearing; 2. Packaging bag; 3. Guide frame. Detailed Implementation

[0019] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figure 1 - Figure 5A liquid multi-row packaging machine based on roller-pressed drainage includes a roller-pressed drainage mechanism, which comprises two roller pressing units 1 for pressing both sides of a packaging bag 2. Each roller pressing unit 1 includes a rotating ring 11, an annular film 12, a drive unit 13, and a support column 14. Two rotating rings 11 are arranged coaxially, with a gap between them. The annular film 12 is positioned along the axial direction of the rotating rings 11 within the gap, and both ends of the annular film 12 are fixedly connected to the two rotating rings 11 respectively. The membrane 12 is elastic; the drive unit 13 is disposed on one side of the two rotating rings 11 and is used to drive the two rotating rings 11 to rotate synchronously; the support column 14 passes through one side of the two rotating rings 11 along the axis of the rotating rings 11, and the rotating rings 11 and the support column 14 are rotatably engaged. The two rotating rings 11, the annular membrane 12 and the support column 14 together form an inflation chamber. A first ventilation groove 141 communicating with the inflation chamber is opened in the support column 14, and a first air pump communicating with the first ventilation groove 141 is disposed on one side of the support column 14.

[0021] In the production process of a fully automatic multi-row liquid packaging machine, the roller pressing and draining mechanism is one of the core functional components, playing a dual crucial role: On the one hand, through the close contact between the pressure roller and the packaging bag 2, the shape of the packaging bag 2 after being filled with liquid is restricted. The filled packaging bag 2 is cylindrical, and after being pressed by the roller pressing and draining mechanism, the horizontal cross-section of the packaging bag 2 is elliptical, ensuring that the bag is regular and the size is uniform, meeting the process requirements of subsequent sealing, cutting and other processes. That is, when the cylindrical packaging bag 2 is flattened into an elliptical structure, it is more conducive to subsequent sealing and opening. On the other hand, with the rotational driving force of the pressure roller, a stable traction force is provided for the packaging bag 2, realizing continuous and efficient conveying of the bag between various processes, ensuring the overall production cycle of the packaging machine.

[0022] Because the pressure rollers in the existing roller-pressing drainage mechanism have a fixed shape design, namely a cylindrical structure, their contact with the outer packaging bag 2 is a rigid fit, and the size of the contact area depends entirely on the actual shape of the outer packaging bag 2. In actual production, since the shape of the pressure rollers in the roller-pressing drainage mechanism is constant, the deformation area of ​​the packaging bag 2 when it passes through the pressure roller is the contact area between the packaging bag 2 and the pressure roller. The limited contact area leads to unstable friction between the pressure roller and the outer packaging bag 2. When the friction is insufficient to overcome the traction resistance, slippage will occur, which not only affects the synchronicity of bag conveying but may also cause quality problems such as bag stretching deformation and misalignment of the seal. In severe cases, it may even interrupt the production process.

[0023] Furthermore, since the packaging bag 2 contains liquid, when the two rollers of the roller-pressing drainage mechanism squeeze the packaging bag 2 to drain the liquid, a typical triangular pressure field is formed inside the bag due to the relative squeezing action of the rollers. The pressure value gradually decreases from the contact edges at both ends of the rollers towards the closest center area, forming a low-pressure concentration zone. According to the principles of fluid mechanics, bubbles remaining in the liquid will migrate to the low-pressure zone under the action of the pressure difference and gradually gather into large bubbles in the upper layer of the low-pressure zone, eventually being able to be discharged on their own. This is the core working principle of existing mechanisms for removing bubbles. However, in practical applications, a small number of bubbles still cannot be completely discharged, especially when storing liquids with low fluidity, where bubble discharge is more difficult. The main reasons include: the viscosity characteristics of the liquid itself hinder the movement of tiny bubbles; and some bubbles are adsorbed on the inner wall of the packaging bag 2 or in the gaps between liquid molecules, making it difficult for them to respond to the migration action of the pressure field.

[0024] Theoretically, if the pressure roller could generate moderate vibration during the extrusion process, the surface tension of the bubbles could be broken through the vibration energy, promoting the aggregation of microbubbles into larger bubbles. Simultaneously, this would enhance the fluidity of the liquid and accelerate the migration of bubbles to low-pressure areas, thus significantly improving the bubble removal effect. Furthermore, slight vibration would have limited impact on the shaping process of the packaging bag. However, this optimization approach cannot be achieved in the existing structure. The core challenge lies in the working characteristics of the pressure roller: it needs to maintain stable rotation to ensure consistent traction speed and uniform extrusion pressure. To achieve pressure roller vibration, an additional vibration drive component is required. Vibration would cause the roller's rotation axis to shift, disrupting rotational stability. This would not only exacerbate wear on the roller bearings and shorten the mechanism's lifespan but also cause fluctuations in extrusion pressure, leading to new quality problems such as bag breakage and liquid leakage. Therefore, without changing the existing stable rotation mode of the pressure roller, current technology cannot improve bubble removal through vibration. The bubble residue problem remains a key bottleneck restricting the improvement of packaging product quality.

[0025] To avoid the above situation, this invention optimizes the roller pressing and draining mechanism in existing multi-row packaging machines. The traditional pressure rollers are replaced with a roller pressing mechanism that utilizes a rotating ring 11 and an annular film 12 to form a deformation-functional mechanism. The annular film 12 contacts the packaging bag 2, and through deformation, the contact area between the annular film 12 and the packaging bag 2 is increased, thereby reducing the probability of slippage. The specific structure and working principle of this invention are as follows: Two roller pressing units 1 are horizontally arranged, and the packaging bag 2 containing liquid passes between the two roller pressing units 1. Initially, the inflation chamber is uninflated, and the annular film 12 does not expand. When the packaging bag 2 passes between the two roller pressing units 1, neither of the corresponding annular films 12 in the two roller pressing units 1 contacts the packaging bag 2. After the packaging bag 2 passes through the two roller pressing units 1, the first air pump inflates the first air vent 141. Since the first air vent 141 is connected to the inflation chamber, the annular film 12 begins to expand as inflation continues. The two simultaneously expanding annular films 12 squeeze and clamp the packaging bag 2. A pressure sensor is installed between the first air pump and the first air vent 141. When the pressure detected by the pressure sensor reaches the preset pressure value, the first air pump stops inflating. At this time, the two annular films 12 squeeze and clamp the packaging bag 2 respectively. The packaging bag 2 deforms under the pressure of the expanding annular films 12, that is, it changes from a cylindrical structure to a near-elliptical structure. Since the annular film 12 is elastic, it also deforms when it comes into contact with the packaging bag 2. Compared with traditional rigid pressure rollers, the annular film 12 with deformation capability has a larger contact area with the packaging bag 2 and stronger anti-slip ability.

[0026] It is worth noting that the drive unit 13 can drive the two rotating rings 11 to rotate synchronously, avoiding the torsion phenomenon caused by the speed difference between the two rotating rings 11 during rotation, which would lead to the torsion of the annular membrane 12 and subsequent damage to the annular membrane 12 due to torsion. The specific structure of the drive unit 13 will be described below.

[0027] Reference Figure 5 and Figure 8 The roller pressing unit 1 also includes a second ventilation groove 142, a second air pump, an extension sleeve 15, and a striking post 16; the second ventilation groove 142 is opened inside the support column 14 and located on one side of the first ventilation groove 141; the second air pump is arranged on one side of the support column 14 and communicates with the second ventilation groove 142; the extension sleeve 15 is arranged on the support column 14 along the radial direction of the support column 14, the extension sleeve 15 communicates with the second ventilation groove 142, and the extension sleeve 15 is located between the two rotating rings 11; the striking post 16 is slidably arranged in the extension sleeve 15 along the extension direction of the extension sleeve 15.

[0028] When the two rotating rings 11 drive the annular membrane 12 to rotate, the second air pump continuously fills and extracts gas into the second venting groove 142, causing the striking column 16, which is slidably mounted on the extension sleeve 15, to slide back and forth on the extension sleeve 15. When the striking column 16 extends under air pressure, it strikes the inner wall of the annular membrane 12. The vibration generated by the strike is transmitted to the packaging bag 2 through the annular membrane 12, allowing air bubbles in the liquid inside the packaging bag 2 to rise and be expelled under the vibration, further reducing the residual amount of air bubbles in the liquid inside the packaging bag 2. The striking position of the striking column 16 is at the contact position between the annular membrane 12 and the packaging bag 2. At the same time, because the annular membrane 12 is elastic, when the striking column 16 strikes the inner wall of the annular membrane 12, the vibration generated by the strike will not be transmitted to the rotating rings 11, ensuring that the rotating rings 11 can stably drive the annular membrane 12 to rotate. This invention can achieve the vibration effect on the packaging bag 2 without affecting the traction stability of the roller pressing unit 1.

[0029] Reference Figure 1 - Figure 10 A pressure sensor is provided between the first ventilation slot 141 and the first air pump to detect the air pressure inside the first ventilation slot 141.

[0030] By setting up a pressure sensor, when the first air pump fills the inflation chamber with gas, causing the annular film 12 to expand, the pressure detected by the pressure sensor gradually increases. Since the two roller pressing units 1 are relatively stationary, the distance between the corresponding annular films 12 in the two roller pressing units 1 changes after the annular film 12 expands, thereby completing the shaping of the packaging bag 2. When shaping packaging bags 2 of different thicknesses, the shape of the packaging bag 2 can be shaped by changing the expansion size of the annular film 12. Before production, the debugging personnel conduct debugging experiments to determine the corresponding air pressure for producing packaging bags 2 of different thicknesses and record the values ​​for direct input during production.

[0031] Reference Figure 2 Pattern 121 is formed on the outer wall of the annular membrane 12.

[0032] By creating patterns 121 on the outer wall of the annular film 12, the annular film 12 has greater friction when it comes into contact with the packaging bag 2, further reducing the probability of slippage between the annular film 12 and the packaging bag 2.

[0033] Reference Figure 5 and Figure 8 A striking roller 161 is rotatably provided at the end of the striking column 16 away from the extension sleeve 15, and the axis of the striking roller 161 is parallel to the axis of the annular membrane 12.

[0034] When the striking post 16 slides out of the extension sleeve 15 under air pressure, its end contacts the inner wall of the annular membrane 12. However, the striking post 16 does not immediately retract; that is, the annular membrane 12 remains in a rotating state while its end contacts the inner wall. Because the striking post 16 does not immediately separate from the inner wall of the annular membrane 12 after contact, the end of the striking post 16 and the inner wall of the annular membrane 12 are in a sliding fit for a period of time. If the end of the striking post 16 is not equipped with a rotatable striking roller 161, the striking post 16 will cause significant wear on the rotating inner wall of the annular membrane 12 when it contacts the inner wall. This will not only cause pulling on the annular membrane 12 during rotation, hindering its rotation, but also lead to damage to the annular membrane 12 after long-term use. The presence of a striking roller 161 at the end of the striking post 16 avoids these problems.

[0035] When the second air pump supplies air to the second air vent 142, the striking column 16 slides out from the extension sleeve 15. The striking roller 161, located at the end of the striking column 16, contacts the inner wall of the annular membrane 12 and generates a striking effect. At this time, the striking roller 161 rolls with the inner wall of the annular membrane 12, and the striking column 16 indirectly contacts the annular membrane 12. Because the striking roller 161 rolls with the inner wall of the annular membrane 12, the striking roller 161 will not pull on the inner wall of the annular membrane 12, thus not affecting the normal rotation of the annular membrane 12 and extending the service life of the annular membrane 12.

[0036] Reference Figure 9 The roller pressing unit 1 also includes a sealing groove 111 and a sealing ring 17; multiple sealing grooves 111 are provided at the ends of the two rotating rings 11 that are far apart from each other, and the sealing grooves 111 are nested from the inside to the outside at the ends of the rotating rings 11; two sealing rings 17 are provided and are respectively fixed on the support column 14 on the side of the two rotating rings 11 that are far apart from each other, and multiple sealing protrusions 171 are provided on the sealing rings 17 that are corresponding to and engage with the sealing grooves 111.

[0037] Since the sealing ring 17 is fixedly mounted on the support column 14, when gas is filled into the inflation chamber, the air pressure inside the chamber gradually increases, and the annular membrane 12 gradually expands. The rotating ring 11 can not only rotate with the support column 14, but also slide with the support column 14 along its extension direction. It is worth noting that the maximum relative displacement between the support column 14 and the rotating ring 11 in the extension direction of the support column 14 is 1 mm, meaning that the rotating ring 11 can only move slightly. When gas is filled into the inflation chamber, the air pressure inside the chamber increases, and the two rotating rings 11 move to both sides under the action of air pressure, making the sealing groove 111 and the sealing protrusion 171 more tightly inserted together. That is, after the air pressure in the inflation chamber increases, the sealing effect between the rotating ring 11 and the sealing ring 17 will be better, further preventing air leakage.

[0038] In addition, during the process of the roller pressing unit 1 pulling the packaging bag 2, a slight air leakage may occur. Therefore, the first air pump needs to make adaptive air replenishment according to the air pressure value detected by the air pressure sensor to ensure the clamping force of the annular film 12 on the packaging bag 2.

[0039] Reference Figure 10 The sealing protrusion 171 is nested from the inside to the outside at the end of the sealing ring 17. Multiple balls 172 are arranged around the axis of the sealing ring 17 on the outermost sealing protrusion 171. The balls 172 are rotatably arranged on the sealing protrusion 171 and slide in cooperation with the sealing groove 111.

[0040] By setting the ball bearing 172, the friction between the sealing ring 17 and the rotating ring 11 is reduced, which can reduce the influence of external frictional resistance on the rotating ring 11 when it rotates, and also reduce the wear between the sealing ring 17 and the rotating ring 11.

[0041] Reference Figure 2 - Figure 4 and Figure 6 The drive unit 13 includes a belt drive assembly 131, a rotary driver 132, and a connecting shaft 133. Two belt drive assemblies 131 are provided and are respectively disposed on two rotating rings 11. The rotary driver 132 is disposed on one side of the belt drive assembly 131. The connecting shaft 133 is connected to the two belt drive assemblies 131, and the two belt drive assemblies 131 rotate synchronously through the connecting shaft 133. The rotary driver 132 is used to drive the belt drive assembly 131 and the connecting shaft 133 to rotate.

[0042] The belt drive assembly 131 includes a synchronous belt 1311 and synchronous pulleys 1312. Two synchronous pulleys 1312 are provided; one is fixedly connected to the rotating ring 11, and the other is located on one side of the first pulley 1312. The synchronous belt 1311 is fitted onto both pulleys 1312 and engages with them in a driving relationship. The two pulleys 1312 not connected to the rotating ring 11 are fixedly connected by a connecting shaft 133. The rotary driver 132 is preferably a servo motor. This enables the rotary driver 132 to drive the two rotating rings 11 to rotate synchronously via the belt drive assembly 131 and the connecting shaft 133.

[0043] Reference Figure 1 and Figure 3 A guide frame 3 is provided above the two roller pressing units 1 to guide the packaging bags 2 to descend.

[0044] Guided by the guide frame 3, the packaging bag 2 can pass smoothly between the two roller pressing units 1 without deviation, ensuring that the packaging bag 2 can be smoothly clamped and rolled by the two roller pressing units 1.

[0045] Reference Figure 1 - Figure 10 This invention also relates to a liquid multi-row packaging process based on roller pressure drainage, employing a liquid multi-row packaging machine based on roller pressure drainage, the specific steps of which are as follows: S1. The packaging bag 2 containing liquid is introduced between two roller pressing units 1. The first air pump inflates the inflation chamber through the first air groove 141. The annular film 12 gradually expands and squeezes the packaging bag 2. The inflation stops after the air pressure in the inflation chamber reaches the rated value. S2, the drive unit 13 drives the two rotating rings 11 to rotate synchronously, and the annular film 12 rolls and cooperates with the packaging bag 2 to pull the packaging bag 2; S3. The striking column 16 can extend and retract under the reciprocating inflation and suction of the second air pump. During the extension and retraction, the striking column 16 strikes the annular membrane 12 and indirectly transmits the impact to the packaging bag 2, causing the air bubbles in the liquid inside the packaging bag 2 to be expelled.

[0046] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A liquid multi-row packaging machine based on roller pressing and draining, comprising a roller pressing and draining mechanism, the roller pressing and draining mechanism comprising two roller pressing units (1) for pressing both sides of a packaging bag (2); characterized in that, The roller pressing unit (1) includes a rotating ring (11), an annular membrane (12), a driving unit (13), and a support column (14); two rotating rings (11) are arranged coaxially, with a gap between them; the annular membrane (12) is positioned in the gap along the axial direction of the rotating rings (11), and both ends of the annular membrane (12) are fixedly connected to the two rotating rings (11), and the annular membrane (12) is elastic; the driving unit (13) is positioned on one side of the two rotating rings (11) and... Used to drive two rotating rings (11) to rotate synchronously; the support column (14) passes through one side of the two rotating rings (11) along the axis of the rotating rings (11), the rotating rings (11) and the support column (14) rotate in cooperation, the two rotating rings (11), the annular membrane (12) and the support column (14) together form an air chamber, a first ventilation groove (141) communicating with the air chamber is opened in the support column (14), and a first air pump communicating with the first ventilation groove (141) is provided on one side of the support column (14).

2. The liquid multi-row packaging machine based on roller pressure drainage according to claim 1, characterized in that, The roller pressing unit (1) also includes a second ventilation groove (142), a second air pump, an extension sleeve (15), and a striking column (16); the second ventilation groove (142) is opened inside the support column (14) and located on one side of the first ventilation groove (141); the second air pump is set on one side of the support column (14) and communicates with the second ventilation groove (142); the extension sleeve (15) is set on the support column (14) along the radial direction of the support column (14), the extension sleeve (15) communicates with the second ventilation groove (142), and the extension sleeve (15) is located between the two rotating rings (11); the striking column (16) is slidably set in the extension sleeve (15) along the extension direction of the extension sleeve (15).

3. A liquid multi-row packaging machine based on roller pressure drainage according to claim 2, characterized in that, A pressure sensor is provided between the first ventilation slot (141) and the first air pump to detect the air pressure inside the first ventilation slot (141).

4. A liquid multi-row packaging machine based on roller pressure drainage according to claim 2, characterized in that, Patterns (121) are formed on the outer wall of the annular membrane (12).

5. A liquid multi-row packaging machine based on roller pressure drainage according to claim 2, characterized in that, A striking roller (161) is rotatably provided at the end of the striking column (16) away from the extension sleeve (15), and the axis of the striking roller (161) is parallel to the axis of the annular membrane (12).

6. A liquid multi-row packaging machine based on roller pressure drainage according to claim 1, characterized in that, The roller pressing unit (1) also includes a sealing groove (111) and a sealing ring (17); multiple sealing grooves (111) are provided at the ends of the two rotating rings (11) that are far apart from each other, and the sealing grooves (111) are nested from the inside to the outside at the ends of the rotating rings (11); two sealing rings (17) are provided and fixedly installed on the support column (14) on the side of the two rotating rings (11) that are far apart from each other, and multiple sealing protrusions (171) are provided on the sealing rings (17) that are corresponding to and engage with the sealing grooves (111).

7. A liquid multi-row packaging machine based on roller pressure drainage according to claim 6, characterized in that, The sealing protrusion (171) is nested from the inside to the outside at the end of the sealing ring (17). On the outermost sealing protrusion (171), there are multiple balls (172) distributed around the axis of the sealing ring (17). The balls (172) are rotatably mounted on the sealing protrusion (171) and slide in contact with the sealing groove (111).

8. A liquid multi-row packaging machine based on roller pressure drainage according to claim 1, characterized in that, The drive unit (13) includes a belt drive assembly (131), a rotary driver (132), and a connecting shaft (133). There are two belt drive assemblies (131) respectively located on two rotating rings (11). The rotary driver (132) is located on one side of the belt drive assembly (131). The connecting shaft (133) is connected to the two belt drive assemblies (131), and the two belt drive assemblies (131) rotate synchronously through the connecting shaft (133). The rotary driver (132) is used to drive the belt drive assembly (131) and the connecting shaft (133) to rotate.

9. A liquid multi-row packaging machine based on roller pressure drainage according to claim 1, characterized in that, A guide frame (3) is provided above the two roller pressing units (1) to guide the packaging bags (2) to descend.

10. A liquid multi-row packaging process based on roller pressure drainage, employing a liquid multi-row packaging machine based on roller pressure drainage as described in any one of claims 2-9, characterized in that, The specific steps are as follows: S1. The packaging bag (2) containing liquid is introduced between two roller pressing units (1). The first air pump inflates the inflation chamber through the first air groove (141). The annular membrane (12) gradually expands and squeezes the packaging bag (2). The inflation stops after the air pressure in the inflation chamber reaches the rated value. S2, the drive unit (13) drives the two rotating rings (11) to rotate synchronously, and the annular film (12) rolls and cooperates with the packaging bag (2) to pull the packaging bag (2); S3. The striking column (16) extends and retracts within the extension sleeve (15) under the reciprocating inflation and suction action of the second air pump. The striking column (16) during the extension and retraction strikes the annular membrane (12) and indirectly transmits the impact to the packaging bag (2), causing the air bubbles in the liquid inside the packaging bag (2) to be expelled.

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