Device and method for filling material into container

Abstract

The invention relates to the technical field of food and medicine packaging methods and equipment, in particular to a device and method for filling materials into a container. The invention provides a device for filling a material into a container. The device comprises a liquid source assembly, a buffer tank, a distribution unit, a verification assembly, a gas source assembly and a control assembly. Accurate filling is achieved through a multi-feedback control mechanism, the pressure intensity sensor and the liquid level sensor in the buffer tank provide real-time data, the control assembly adjusts liquid inlet and gas pressure stabilization accordingly, and the pressure stability in the filling process is guaranteed. And meanwhile, through the material net weight fed back by the verification assembly, the control assembly can dynamically adjust the opening duration and proportional-integral-differential parameters of the filling assembly, and the filling precision is continuously optimized. Compared with a traditional method, the closed-loop control system has the advantages that the filling precision is greatly improved, meanwhile, the control process is simplified, and tedious multi-branch pressure control is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of food and medicine packaging methods and equipment, and in particular to a device and method for filling materials into containers. Background Art

[0002] In the process of food and medicine packaging, the existing technology is to directly input the solution into the branch through the buffer tank, and then use the pressure detection device on each branch to detect the pressure of each branch and feed it back to the controller to control the filling volume and filling accuracy. This method has the following problems: First, the pressure of each branch needs to be accurately controlled, which makes the control feedback process cumbersome and complicated. Each branch requires a separate pressure detection device and control mechanism, which increases the complexity and cost of the system.

[0003] Secondly, since the pressure of each branch needs to be controlled separately, it is easy to cause pressure imbalance between the branches, thus affecting the consistency and accuracy of filling.

[0004] In addition, the instability of pressure control may also lead to liquid overflow or insufficient filling during the filling process, increasing the scrap rate and material waste in the production process. Summary of the invention

[0005] The object of the present invention is to provide a device and method for filling materials into a container, so as to improve the filling accuracy, simplify the pressure control feedback process, and improve the stability of pressure control.

[0006] The present application provides a device for filling a material into a container, comprising a liquid source component, a buffer tank, a distribution unit, a calibration component, an air source component and a control component; The buffer tank comprises a tank body, an interface provided on the tank body and connected to the gas source assembly, and a first sensor and a second sensor connected to the tank body. The tank body is provided with an inlet and an outlet, the inlet is connected to the liquid source assembly, the outlet is connected to the distribution unit, and is electrically connected to the control assembly. The first sensor is used to detect the pressure in the tank body and feed it back to the control assembly, and the second sensor is used to detect the height of the material in the tank body and feed it back to the control assembly. The dispensing unit is provided with a plurality of filling needles corresponding to each other, and the filling needles are used to fill the material in the dispensing unit into a designated container; The verification component is used to obtain the net weight of the material in each of the containers and feed the net weight of the material back to the control component; The control component is used to control the liquid source component to adjust the height of the material in the tank body and control the air source component to adjust the pressure in the tank body according to the feedback from the first sensor and the second sensor. The control component dynamically adjusts the filling time of the filling needle through the monitoring of the verification component.

[0007] Furthermore, it also includes a tube clamping assembly, the distribution unit includes a main material distribution pipeline, a hose and a adapter assembly, the main material distribution pipeline is connected to the outlet of the tank body, the adapter assembly is used to connect the material in the main material distribution pipeline with the filling needle through the hose, and the tube clamping assembly is used to clamp or release the hose to allow the filling needle to fill or stop filling.

[0008] Further, the adapter assembly includes a material distribution pipe, a first adapter and a second adapter, the first adapter and the second adapter each having a first end and a second end, one end of the material distribution pipe is connected to the material distribution main pipeline, and the other end is connected to the first end of the first adapter, one end of the hose is connected to the second end of the first adapter, and the other end is connected to the first end of the second adapter, the second end of the second adapter is connected to the filling needle, and the first adapter and the second adapter fix the hose on the tube clamping unit.

[0009] Further, the inlet diameter at the first end of the first adapter is greater than the outlet diameter at the second end, the inlet diameter at the first end of the second adapter is greater than the outlet diameter at the second end, and the outlet diameter at the second end of the first adapter is equal to the inlet diameter at the first end of the second adapter.

[0010] Further, the inlet diameter at the first end of the first adapter is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2 or greater than 2 and less than or equal to 2.2; the inlet diameter at the first end of the second adapter is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2 or greater than 2 and less than or equal to 2.2.

[0011] Furthermore, the tube clamping assembly includes at least one pressure plate and at least one tube clamping unit, the tube clamping unit corresponds to the filling needle one by one, the tube clamping unit includes a driving mechanism and a driving rod, the hose passes through the gap between the pressure plate and the driving rod, and the driving mechanism is used to drive the driving rod to approach or move away from the pressure plate to clamp or release the hose.

[0012] The present application also provides a pressure filling method, which is applied to the device for filling a material into a container according to any one of the above technical solutions, comprising: The height of the material in the tank is controlled within a set height range and the pressure in the tank is controlled within a set pressure range by a proportional-integral-differential control algorithm; Controlling the filling time of the filling needle according to the target filling volume; The filling time and proportional-integral-differential parameters of the filling needle are dynamically corrected according to the net weight of the material.

[0013] Furthermore, an inert gas is introduced into the tank body through a gas source assembly to control the pressure in the tank body to float within a set range.

[0014] Furthermore, when the height decreases, the flow rate of the replenished liquid is synchronously adjusted through the flow proportional valve, and the flow rate of the replenished gas is synchronously adjusted through the pressure proportional valve.

[0015] Furthermore, a hose is used to supply material to the filling needle, and the filling material is stopped by clamping the hose. The process of clamping the hose includes a first stage and a second stage. In the first stage, the hose is clamped at a first speed to a set retention rate to stop the hose from discharging liquid. In the second stage, the hose is continued to be clamped at a second speed until it is completely closed to suck back the residual material in the filling needle. The second speed is greater than the first speed, and the first retention rate has a value range of 90%-98%.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: This application achieves precise filling through multiple feedback control mechanisms. The pressure sensor and height sensor in the buffer tank provide real-time data, and the control component adjusts the liquid inlet and gas pressure stabilization accordingly to ensure pressure stability during the filling process. At the same time, by verifying the net weight of the material fed back by the component, the control component can dynamically adjust the filling time and proportional-integral-differential parameters of the filling needle to continuously optimize the filling accuracy. Compared with traditional methods, this closed-loop control system greatly improves the filling accuracy, simplifies the control process, and avoids cumbersome multi-branch pressure control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of one embodiment of a device for pouring materials into a container according to the present application; Figure 2 for Figure 1 A schematic diagram of the structure of a buffer tank of a device for pouring materials into a container; Figure 3 for Figure 1 A schematic diagram of the structure of a pipe clamping assembly and a filling assembly of a device for pouring materials into a container; Figure 4 for Figure 3 A schematic structural diagram of the tube clamping assembly and the filling assembly from another perspective; Figure 5 for Figure 3 A schematic structural diagram of a first adapter of a filling assembly; Figure 6 for Figure 5 AA section view of the first adapter in FIG.

[0018] Reference numerals: 10. Frame; 20. Liquid source assembly; 30. Buffer tank; 31. Tank body; 311. Inlet; 312. Outlet; 32. Interface; 33. Second sensor; 34. Third sensor; 35. Fourth sensor; 36. First sensor; 37. Converter; 40. Main distribution pipeline; 50. pipe clamping assembly; 81. pressing plate; 82. driving mechanism; 83. driving rod; 84. fixed base plate; 85. semi-cylindrical plate; 60. Verification component; 71. Filling needle; 72. First adapter; 73. Second adapter; 80. Touch screen. DETAILED DESCRIPTION

[0019] The following will describe a device and method for pouring a material into a container of the present invention in conjunction with a schematic diagram, wherein a preferred embodiment of the present invention is shown, and it should be understood that those skilled in the art can modify the present invention described herein and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation of the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in very simplified form and in non-precise proportions, and are only used to facilitate and clearly assist in illustrating the purpose of the embodiments of the present invention.

[0023] The following is attached to the instruction manual Figures 1 to 6 , a device for filling a material into a container and a filling method of the present invention are introduced.

[0024] In one embodiment, if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device for pouring materials into a container includes a frame 10 and a liquid source component 20, a buffer tank 30, a distribution unit, a calibration component 60, an air source component and a control component arranged on the frame 10.

[0025] like Figure 2 As shown, the buffer tank 30 includes a tank body 31, an interface 32 arranged on the tank body 31, and a first sensor 36 and a second sensor 33 connected to the tank body. The tank body 31 is provided with an inlet 311 and an outlet 312, the inlet 311 is connected to the liquid source component 20, the outlet 312 is connected to the distribution unit, and is electrically connected to the control component. The first sensor 36 is a pressure sensor, which is used to detect the pressure in the tank body 31 and feed it back to the control component, specifically to detect the liquid pressure at the bottom of the inner cavity of the tank body 31, and the second sensor 33 is a liquid level sensor, which is used to detect the height of the material in the tank body 31 and feed it back to the control component.

[0026] The distribution unit has a plurality of filling needles 71 corresponding to each other, and the filling needles 71 are used to fill the material in the distribution unit into a designated container. Specifically, a conversion joint 37 is connected to the outlet 312 of the tank body 31, the first sensor 36 is connected to the conversion joint 37, and the inlet end of the distribution unit is also connected to the conversion joint 37.

[0027] The verification component 60 is used to obtain the net weight of the material in each of the containers and feed the net weight of the material back to the control component.

[0028] The control component is used to control the liquid source component 20 to adjust the height of the material in the tank body 31 and control the air source component to adjust the pressure in the tank body 31 according to the feedback from the first sensor 36 and the second sensor 33. The control component dynamically adjusts the filling time of the filling needle 71 through the monitoring of the verification component 60.

[0029] The liquid source assembly 20 refers to a pipeline system for conveying materials to the buffer tank 30 , and can be implemented by a stainless steel pipe or a food-grade hose.

[0030] The buffer tank 30 refers to a container for temporarily storing and stabilizing materials, and can be implemented by a sealed tank body made of stainless steel.

[0031] The distribution unit refers to a piping system that distributes materials from the buffer tank 30 to each filling needle 71, and can be specifically implemented by using a stainless steel pipe with multiple branch outlets and a branching component.

[0032] The calibration component 60 refers to a device for measuring the net weight of a material, which can be implemented by a high-precision electronic scale or a weighing sensor.

[0033] The gas source assembly is used to introduce gas into the buffer tank 30 to stabilize the pressure in the buffer tank 30 , and can be implemented by using a stainless steel pipe or a food-grade hose.

[0034] The control component includes a touch screen 80 and a central processing unit connected to the touch screen 80 for coordinating and controlling the entire filling process, which can be implemented by a programmable logic controller (PLC) or an industrial computer.

[0035] The present application realizes precise filling through multiple feedback control mechanisms. The pressure sensor and liquid level sensor in the buffer tank 30 provide real-time data, and the control component adjusts the liquid inlet and gas pressure stabilization accordingly to ensure the pressure stability during the filling process. At the same time, by checking the net weight of the material fed back by the component 60, the control component can dynamically adjust the filling time of the filling needle 71 and continuously optimize the filling accuracy. Compared with the traditional method, this closed-loop control system greatly improves the filling accuracy, simplifies the control process, and avoids the cumbersome multi-branch pressure control.

[0036] In some embodiments, a third sensor 34 is further provided in the tank body 31. The third sensor 34 is a pressure sensor, which is used to detect the gas pressure in the tank body 31 in real time, so that the operator can monitor the pressure in the tank body 31 in real time. A fourth sensor 35 is further provided at the bottom of the tank body 31. The fourth sensor 35 is a temperature sensor, which is used to monitor the temperature of the material in the tank body 31 in real time.

[0037] In some embodiments, the device for pouring the material into the container also includes a tube clamping assembly, and the distribution unit also includes a main material distribution pipeline 40, a hose (not shown in the drawings) and a adapter assembly, the main material distribution pipeline 40 is connected to the outlet 312 of the tank body 31, the adapter assembly is used to introduce the material in the main material distribution pipeline 40 into the filling needle 71 through the hose, and the tube clamping assembly 50 is used to clamp or release the hose to allow the filling needle 71 to fill or stop filling, which can be specifically achieved by using an electric or pneumatic clamping device.

[0038] The hose is a flexible connecting component, and can be made of different materials and diameters to accommodate materials with different viscosities and flow rates. The length of the hose can be adjusted according to actual needs to meet the requirements of different filling positions. The flexible nature of the hose not only facilitates the filling operation, but also provides convenience for the control of the clamp assembly 50.

[0039] The filling needle 71 is connected to the end of the hose, and its design can be optimized according to the characteristics of the filling material and the shape of the container. For example, for high-viscosity materials, a filling needle 71 with a larger inner diameter can be designed; for materials that are prone to foaming, a special anti-foaming filling needle 71 can be designed. The length and angle of the filling needle 71 can also be adjusted according to the size and depth of the container's opening to ensure that the material enters the container accurately.

[0040] In one embodiment, if Figure 3 and Figure 4 As shown, the adapter assembly includes a distribution pipe, a first adapter 72 and a second adapter 73, the first adapter 72 and the second adapter 73 both having a first end and a second end, one end of the distribution pipe is connected to the distribution main pipeline 40, and the other end is connected to the first end of the first adapter 72, one end of the hose is connected to the second end of the first adapter 72, and the other end is connected to the first end of the second adapter 73, the second end of the second adapter 73 is connected to the filling needle 71, the first adapter 72 and the second adapter 73 can also support and constrain the hose, thereby fixing the hose on the tube clamping unit.

[0041] Specifically, the material distribution pipe can be made of different materials, preferably hard pipes, such as stainless steel, hard plastic or hard composite materials, so that it is not easy to deform. The first adapter 72 and the second adapter 73 can be designed to be detachable for easy cleaning and maintenance. The internal structure of these adapters can be further optimized, such as setting a streamlined channel to reduce the resistance and dead angle of the material during the flow process. The first adapter 72 and the second adapter 73 are both supported by the adapter bracket on the frame 10.

[0042] The connection method between the various components of the adapter assembly can also be flexibly designed. For example, the connection between the material distribution pipe and the first adapter 72 can be threaded, snap-on or quick-connect. The connection between the hose and the adapter can use a special hose connector to ensure the sealing and stability of the connection. The selection of these connection methods needs to take into account the actual application scenario, such as the characteristics of the filling medium, the requirements of the operating environment, etc.

[0043] During the filling process, the material first enters the material distribution pipe from the material distribution main pipeline 40, and then enters the hose through the first adapter 72. The flexible design of the hose allows it to be clamped and deformed to control the filling needle 71 to fill or stop filling. In addition, the flexible design of the hose also allows the filling needle 71 to have a certain degree of freedom of movement, which is convenient for aligning containers at different heights or positions. The material continues to enter the filling needle 71 through the second adapter 73, and is finally accurately filled into the designated container.

[0044] In some embodiments, in order to improve the smoothness of liquid flow, the inlet diameter at the first end of the first adapter 72 is larger than the outlet diameter at the second end, the inlet diameter at the first end of the second adapter 73 is larger than the outlet diameter at the second end, and the outlet diameter at the second end of the first adapter 72 is equal to the inlet diameter at the first end of the second adapter 73.

[0045] like Figure 5 and Figure 6 As shown, the inlet diameter of the first adapter 72 and the second adapter 73 is larger than the outlet diameter, which can reduce the resistance when the liquid enters, and at the same time form a certain pressure at the outlet, which is conducive to the flow of the liquid. The outlet diameter of the first adapter 72 is equal to the inlet diameter of the second adapter 73, ensuring that the connection between the two adapters will not generate additional flow resistance due to a sudden change in diameter, thereby making the liquid flow smooth and avoiding the liquid flow resistance caused by diameter changes.

[0046] Preferably, the inlet diameter at the first end of the first adapter 72 is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2, or greater than 2 and less than or equal to 2.2. The inlet diameter at the first end of the second adapter 73 is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2, or greater than 2 and less than or equal to 2.2.

[0047] The ratio of the inlet and outlet diameters of the first adapter 72 and the second adapter 73 can be adjusted according to actual needs. For example, when the filling material is a low-viscosity liquid, a smaller first setting multiple and a smaller second setting multiple can be selected, such as 1.2-1.5; when the filling material is a high-viscosity liquid, a larger first setting multiple and a larger second setting multiple can be selected, such as greater than 2 and less than or equal to 2.2. This flexible design can adapt to the filling needs of different types of materials and further improve the filling accuracy.

[0048] As a preferred embodiment, the first adapter 72 can be made of stainless steel, with an inlet diameter of 15 mm at the first end and an outlet diameter of 10 mm at the second end. The second adapter 73 is also made of stainless steel, with an inlet diameter of 10 mm at the first end, which is equal to the outlet diameter of the first adapter 72, and an outlet diameter of 7 mm at the second end. This design not only ensures the smooth flow of liquid in the adapter assembly, but also improves the durability and hygiene of the entire device.

[0049] In some embodiments, in order to clamp or release the hose, the tube clamping assembly 50 includes a pressure plate 81 and a plurality of tube clamping units, the plurality of tube clamping units correspond one-to-one to the plurality of filling needles 71, the tube clamping unit includes a driving mechanism 82 and a driving rod 83, the hose passes through the gap between the pressure plate 81 and the driving rod 83, the driving mechanism 82 is used to drive the driving rod 83 to approach or move away from the pressure plate 81 to clamp or release the hose.

[0050] The design of the clamping assembly 50 of the present application can realize independent control of each filling needle 71, thereby improving the accuracy and flexibility of the filling process. By controlling the driving mechanism 82, the position of the driving rod 83 can be accurately adjusted, thereby realizing accurate clamping or release of the hose. This mechanism design is simple and reliable, easy to operate and maintain, and can quickly respond to control instructions, which is conducive to improving filling efficiency and accuracy.

[0051] Specifically, in the clamping assembly 50 of the present application, the pressing plate 81 can be made of a rigid material, such as stainless steel or high-strength engineering plastics, to provide a stable support surface. The surface of the pressing plate 81 can be polished to reduce friction with the hose and extend the service life of the hose. In the present embodiment, the lower bottom surface of the pressing plate 81 is formed with an arc surface. The driving rod 83 can be designed in a cylindrical or prismatic shape, and its surface in contact with the hose can be rounded to avoid damage to the hose. In the present embodiment, the pressing plate 81 includes a fixed base plate 84 and a semi-cylindrical plate 85 located at the bottom of the fixed base plate 84, the fixed base plate 84 is fixed on the frame 10, and the outer peripheral surface of the semi-cylindrical plate 85 forms the arc surface.

[0052] The driving mechanism 82 can be implemented in various forms. For example, as shown in the figure, a crank-connecting rod mechanism driven by a motor can be used to achieve precise displacement of the driving rod 83 by controlling the forward and reverse rotation of the motor. For another example, a lead screw mechanism driven by a motor can be used to achieve precise displacement of the driving rod 83 by controlling the forward and reverse rotation of the motor. Another way is to use a pneumatic cylinder or a hydraulic cylinder as a driving source and adjust the position of the driving rod 83 by controlling the air pressure or the hydraulic pressure. These driving mechanisms 82 can be selected according to the actual application scenario and precision requirements.

[0053] The clamping assembly 50 of the present application is well matched with the filling needle 71. When the material flow needs to be controlled, the driving mechanism 82 drives the driving rod 83 close to the pressure plate 81, and the hose is clamped to prevent the material from flowing. When filling is required, the driving mechanism 82 drives the driving rod 83 away from the pressure plate 81, and the hose is released to allow the material to flow. This design allows each filling needle 71 to be independently controlled, greatly improving the flexibility and accuracy of the filling system.

[0054] Furthermore, the clamping assembly 50 of the present application can be integrated with a control system to achieve automatic control. The control system can accurately control the action time and displacement of each driving mechanism 82 according to the filling requirements. For example, the position of the driving rod 83 can be accurately controlled by a PID control algorithm (i.e., a proportional-integral-differential control algorithm), thereby achieving accurate adjustment of the clamping force of the hose. This precise control can not only ensure the accuracy of the filling amount, but also extend the service life of the hose.

[0055] In a specific embodiment, the pressing plate 81 can be designed as a stainless steel plate with a length of 500mm, a width of 100mm, and a thickness of 20mm. 10 tube clamping units can be evenly distributed under the pressing plate 81, and the spacing between each unit is 50mm. The driving mechanism 82 of each tube clamping unit adopts a crank connecting rod structure driven by a stepping motor, and the stepping accuracy of the stepping motor is 0.1mm / step. The driving rod 83 adopts a stainless steel cylinder with a diameter of 10mm, and the surface in contact with the hose can be rounded. The hose adopts a food-grade silicone tube with an inner diameter of 6mm and an outer diameter of 8mm. The maximum stroke of the driving rod 83 is 20mm, and the position accuracy can be accurately controlled to 0.1mm through the control system.

[0056] This design can achieve precise clamping control of the hose. For example, when the hose needs to be completely closed, the drive rod 83 can be moved to a position 2 mm away from the pressure plate, at which time the hose is completely flattened to prevent the material from flowing. When the flow rate needs to be precisely controlled, the opening of the hose can be changed by adjusting the position of the drive rod 83, thereby achieving precise control of the flow rate.

[0057] Compared with the prior art, the design of the clamping tube assembly 50 of the present application has significant advantages. Conventional clamping tube devices usually use a unified clamping mechanism, which makes it difficult to achieve independent and precise control of each filling needle 71. The design of the present application achieves precise control of each hose by equipping each filling needle 71 with an independent clamping tube unit. This design not only improves the filling accuracy, but also increases the flexibility of the system, and can quickly adjust the filling parameters according to the needs of different products.

[0058] In addition, the design of the present application adjusts the opening of the hose by precisely controlling the position of the driving rod 83, which can achieve more precise flow regulation compared to traditional on-off control. This precise control is of great significance in certain special applications, such as the filling of precision chemicals or medicines.

[0059] The working process of the device for pouring the material into the container of the present application is as follows: First, the liquid source component 20 transports the material to the buffer tank 30. The tank body 31 of the buffer tank 30 is made of stainless steel and has good sealing and corrosion resistance. The tank body 31 is provided with an inlet 311 and an outlet 312, which are respectively connected to the liquid source component 20 and the material distribution main pipeline 40. The first sensor 36 is installed at the bottom of the tank body 31 to detect the liquid pressure at the bottom of the inner cavity of the tank body 31; the second sensor 33 extends into the tank body 31 to detect the height of the material in the tank body 31. Both sensors are electrically connected to the control component and feed back the detection data to the control component in real time.

[0060] The control component adjusts the height of the material in the tank 31 by adjusting the flow proportional valve on the liquid source component 20 according to the feedback data of the first sensor 36 and the second sensor 33, and adjusts the pressure in the tank 31 by adjusting the pressure proportional valve on the air source component. This dual adjustment mechanism can ensure that the material in the buffer tank 30 is in a stable pressure and height state, laying the foundation for accurate filling.

[0061] The dispensing unit distributes the material from the buffer tank 30 to a plurality of filling needles 71. The clamping assembly 50 controls the filling or stopping of the filling needles 71 by clamping or releasing the hose. This design can achieve fast and accurate filling control, and has higher response speed and better sealing performance than traditional valve control.

[0062] The verification component 60 is installed under each filling position and is used to measure the net weight of the material in the container in real time. The verification component 60 feeds back these data to the control component in real time.

[0063] The control component dynamically adjusts the filling time of each of the filling needles 71 according to the net weight of the material fed back by the verification component 60. For example, if it is detected that the filling amount of a filling needle 71 is slightly insufficient, the control component will slightly extend the opening time of the component; conversely, if the filling amount is slightly more, the filling needle 71 will be closed in advance. This dynamic adjustment mechanism can effectively compensate for the filling error caused by pressure fluctuations or other factors, thereby achieving high-precision filling.

[0064] The present application also provides a pressure filling method, which is applied to a device for filling a material into a container as described in any one of the above technical solutions, comprising: The height of the material in the tank body 31 is controlled within a set height range and the pressure at the bottom of the inner cavity of the tank body 31 is controlled within a set pressure range by using a proportional-integral-differential control algorithm; Controlling the filling time of the filling needle 71 according to the target filling volume; The filling time and proportional-integral-differential parameters of the filling needle 71 are dynamically corrected according to the net weight of the material.

[0065] The pressure filling method proposed in this application effectively solves the problems of low filling accuracy and unstable pressure control by precisely controlling the material height and pressure in the tank body 31, combined with the preliminary control and dynamic correction of the filling time and proportional-integral-differential parameters of the filling needle 71. The proportional-integral-differential control algorithm can respond quickly and accurately adjust the height and pressure, ensuring the stability of the filling process. Controlling the opening time according to the target filling volume provides preliminary filling volume control, while dynamically correcting the opening time and proportional-integral-differential parameters according to the actual net weight of the material further improves the filling accuracy. This method avoids the complexity of the need to precisely control the pressure of each branch in traditional technology, simplifies the control process, and improves the filling accuracy and stability.

[0066] Specifically, the pressure filling method proposed in this application includes three main steps: First, the height and pressure of the material in the tank 31 are controlled within a set range by a proportional-integral-differential control algorithm. This step can be achieved in a variety of ways. For example, a height sensor and a pressure sensor can be used to monitor the height and pressure in the tank 31 in real time, and then the height and pressure can be adjusted by controlling the liquid source assembly 20 and the gas source assembly. The proportional-integral-differential control algorithm can quickly and accurately adjust the liquid inlet rate and gas pressure according to the deviation of the current height and pressure from the set value, thereby achieving stable control.

[0067] Secondly, the filling time of the filling needle 71 is controlled according to the target filling volume. This step can be achieved by pre-setting the corresponding relationship between the filling volume and the opening time. For example, a lookup table can be established to select the corresponding initial opening time according to different target filling volumes. In addition, the opening time can also be calculated by a mathematical model, taking into account factors such as the pressure of the tank body 31 and the viscosity of the fluid.

[0068] Finally, the filling time and proportional-integral-differential parameters of the filling needle 71 are dynamically corrected according to the net weight of the material. This step can be achieved through real-time weighing feedback. For example, after each filling is completed, the difference between the actual net weight of the material and the target filling amount can be compared, and then the opening time and proportional-integral-differential parameters of the next filling can be adjusted according to this difference. By dynamically correcting the proportional-integral-differential parameters, the control accuracy of the height and pressure in the tank body 31 can be improved, so as to further improve the filling accuracy.

[0069] There is a close relationship and interaction between these three steps. The proportional-integral-differential control algorithm ensures a stable height and pressure in the tank 31, providing the basic conditions for accurate filling. Controlling the opening time according to the target filling volume provides preliminary filling volume control, while dynamically correcting the opening time and proportional-integral-differential parameters according to the actual material net weight further improves the filling accuracy. This multiple control and feedback mechanism forms a closed-loop system that can continuously optimize the filling process and improve filling accuracy.

[0070] In some of the embodiments, in order to control the pressure in the tank body 31 , an inert gas is introduced into the tank body 31 through a gas source assembly to control the pressure in the tank body 31 to float within a set range.

[0071] This method can achieve accurate control of the pressure in the tank 31, thereby solving the technical problem of controlling the pressure in the tank 31. By stably controlling the pressure in the tank 31 to float within the set value range, the pressure stability during the filling process can be ensured, thereby improving the filling accuracy and filling quality. In addition, the use of inert gas can also prevent the material from contacting with the air, avoiding oxidation or other adverse reactions, and ensuring the quality of the material.

[0072] Specifically, the gas source component can use a variety of methods to achieve the introduction of inert gas into the tank body 31. For example, the gas source component can use a pressure proportional valve to control the pressure of the introduced inert gas, so as to achieve precise regulation of the pressure in the tank body 31.

[0073] Furthermore, the selection of inert gas can be determined according to the characteristics of the material. Commonly used inert gases include nitrogen, argon or carbon dioxide, etc. These gases do not react with most materials and can effectively prevent the material from deteriorating or oxidizing.

[0074] The technical solution of the present application not only solves the problem of pressure control in the tank 31, but also forms a synergistic effect with the entire device for filling the material into the container. Through stable pressure control, the filling accuracy can be improved and the filling error can be reduced. At the same time, the use of inert gas can also extend the shelf life of the material and improve product quality.

[0075] As a preferred embodiment, the gas source assembly may include a gas source and a pressure proportional valve. The gas source provides inert gas, and the pressure proportional valve is used to adjust the gas pressure. The control assembly can dynamically adjust the opening of the pressure proportional valve according to the bottom pressure of the inner cavity of the tank body 31 detected by the first sensor 36, thereby achieving real-time and accurate control of the pressure in the tank body 31.

[0076] For example, when it is detected that the pressure in the tank body 31 is lower than the set value, the control component can increase the opening of the pressure proportional valve to increase the amount of inert gas introduced; when the pressure is higher than the set value, the opening is reduced or the pressure proportional valve is temporarily closed. This closed-loop control method can keep the pressure in the tank body 31 within the ideal range at all times, thereby ensuring the stability and accuracy of the filling process.

[0077] In one of the embodiments, when the altitude decreases, the liquid replenishment flow is synchronously adjusted by the flow proportional valve, and the gas replenishment pressure is synchronously adjusted by the pressure proportional valve.

[0078] Specifically, the second sensor 33 is used to detect the height of the material in the tank 31 and feed back to the control component. When the second sensor 33 detects that the height drops, the control component controls the pressure proportional valve and the flow proportional valve according to the feedback information.

[0079] The liquid replenishment flow rate is regulated by controlling the liquid source assembly 20. When the height decreases, the flow proportional valve will increase the opening of the liquid source assembly 20, thereby increasing the liquid replenishment flow rate to maintain the height in the tank body 31. At the same time, the air replenishment pressure is regulated by controlling the air source assembly. When the height decreases, the pressure proportional valve will adjust the opening of the air source assembly accordingly to adjust the pressure in the tank body 31.

[0080] This synchronous adjustment method can better maintain the height and pressure balance in the tank body 31. For example, when the height drops by 2 cm, the proportional valve may increase the opening of the liquid source component 20 by 10% and increase the opening of the gas source component by 5%. This precise adjustment can ensure that the pressure in the tank body 31 is adjusted accordingly while the liquid is replenished, thereby avoiding pressure fluctuations caused by height changes.

[0081] Furthermore, by combining the proportional-integral-differential control algorithm with the synchronous regulation of the pressure proportional valve and the flow proportional valve, the altitude change can be responded to more quickly and accurately. The proportional-integral-differential control algorithm can calculate the optimal regulation parameters according to the real-time changes of altitude and pressure, while the pressure proportional valve and the flow proportional valve can accurately execute these regulation instructions. This combination not only solves the synchronous regulation problem when the altitude drops, but also improves the stability and accuracy of the entire filling process.

[0082] In one of the embodiments, in order to improve the filling accuracy and prevent the residual material in the filling needle 71 from dripping, a hose is used to supply material to the filling needle 71, and the filling material is stopped by clamping the hose. The process of clamping the hose includes a first stage and a second stage. In the first stage, the hose is clamped at a first speed to a set retention rate to stop the hose from discharging liquid. In the second stage, the hose is continued to be clamped at a second speed until it is completely closed to suck back the residual material in the filling needle 71. The second speed is greater than the first speed, and the first retention rate has a value range of 90%-98%.

[0083] The present application solves the problem of controlling filling accuracy and reducing residual material during the hose clamping process by designing a two-stage clamping process. In the first stage, the hose is clamped at a slower speed to a retention rate of 90%-98%, ensuring accurate control of the filling volume. In the second stage, the hose is fully clamped at a faster speed to achieve the reabsorption of residual material in the filling needle 71. This method not only improves filling accuracy, but also reduces material waste, while improving the efficiency of the entire process through speed control.

[0084] For example, a stepper motor or servo motor can be used to control the movement speed of the clamping mechanism. In the first stage, the motor runs at a lower speed to achieve a slow clamping of the hose. When the set interception rate is reached, the control system will immediately switch to the second stage, the motor speed will increase, and the hose will be completely closed quickly.

[0085] The two-stage clamping process of this application is closely coordinated with the entire filling system. In the first stage, the system ensures that the filling volume reaches the preset value by accurately controlling the clamping speed and time. The rapid clamping in the second stage can not only effectively suck back the residual material, but also prevent the material from dripping, further improving the filling accuracy.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for pouring material into a container, characterized in that: It includes a liquid source component, a buffer tank, a distribution unit, a calibration component, a gas source component and a control component; The buffer tank comprises a tank body, an interface provided on the tank body and connected to the gas source assembly, and a first sensor and a second sensor connected to the tank body. The tank body is provided with an inlet and an outlet, the inlet is connected to the liquid source assembly, the outlet is connected to the distribution unit, and is electrically connected to the control assembly. The first sensor is used to detect the pressure in the tank body and feed it back to the control assembly, and the second sensor is used to detect the height of the material in the tank body and feed it back to the control assembly. The dispensing unit is provided with a plurality of filling needles corresponding to each other, and the filling needles are used to fill the material in the dispensing unit into a designated container; The verification component is used to obtain the net weight of the material in each of the containers and feed the net weight of the material back to the control component; The control component is used to control the liquid source component to adjust the height of the material in the tank body and control the air source component to adjust the pressure in the tank body according to the feedback from the first sensor and the second sensor. The control component dynamically adjusts the filling time of the filling needle through the monitoring of the verification component.

2. The device for pouring material into a container according to claim 1, characterized in that: It also includes a tube clamping assembly, the distribution unit includes a main material distribution pipeline, a hose and a adapter assembly, the main material distribution pipeline is connected to the outlet of the tank body, the adapter assembly is used to connect the material in the main material distribution pipeline with the filling needle through the hose, and the tube clamping assembly is used to clamp or release the hose to enable the filling needle to fill or stop filling.

3. The device for pouring material into a container according to claim 2, characterized in that: The adapter assembly includes a material distribution pipe, a first adapter and a second adapter, the first adapter and the second adapter each having a first end and a second end, one end of the material distribution pipe is connected to the material distribution main pipeline, and the other end is connected to the first end of the first adapter, one end of the hose is connected to the second end of the first adapter, and the other end is connected to the first end of the second adapter, the second end of the second adapter is connected to the filling needle, and the first adapter and the second adapter fix the hose on the tube clamping unit.

4. The device for pouring material into a container according to claim 3, characterized in that: The inlet diameter at the first end of the first adapter is larger than the outlet diameter at the second end, the inlet diameter at the first end of the second adapter is larger than the outlet diameter at the second end, and the outlet diameter at the second end of the first adapter is equal to the inlet diameter at the first end of the second adapter.

5. The device for pouring material into a container according to claim 4, characterized in that: The inlet diameter at the first end of the first adapter is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2 or greater than 2 and less than or equal to 2.

2. The inlet diameter at the first end of the second adapter is a first set multiple of the outlet diameter at the second end, and the first set multiple is greater than or equal to 1.2 and less than 2 or greater than 2 and less than or equal to 2.

2.

6. The device for pouring material into a container according to claim 2, characterized in that: The tube clamping assembly includes at least one pressure plate and at least one tube clamping unit, and the tube clamping unit corresponds to the filling needle one by one. The tube clamping unit includes a driving mechanism and a driving rod. The hose passes through the gap between the pressure plate and the driving rod. The driving mechanism is used to drive the driving rod to move closer to or away from the pressure plate to clamp or release the hose.

7. A method for pouring a material into a container, characterized in that: The device for pouring a material into a container as claimed in any one of claims 1 to 6 comprises: The height of the material in the tank is controlled within a set height range and the pressure in the tank is controlled within a set pressure range by a proportional-integral-differential control algorithm; Controlling the filling time of the filling needle according to the target filling volume; The filling time and proportional-integral-differential parameters of the filling needle are dynamically corrected according to the net weight of the material.

8. The method for pouring material into a container according to claim 7, characterized in that: Inert gas is introduced into the tank body through a gas source component to control the pressure in the tank body to float within a set range.

9. The method for pouring material into a container according to claim 7, characterized in that: When the height drops, the flow rate of the replenished liquid is synchronously adjusted through the flow proportional valve, and the flow rate of the replenished gas is synchronously adjusted through the pressure proportional valve.

10. The method for pouring material into a container according to claim 7, characterized in that: A hose is used to supply material to the filling needle, and the filling material is stopped by clamping the hose. The process of clamping the hose includes a first stage and a second stage. In the first stage, the hose is clamped at a first speed to a set retention rate to stop the hose from discharging liquid. In the second stage, the hose is continued to be clamped at a second speed until it is completely closed to suck back the residual material in the filling needle. The second speed is greater than the first speed, and the value range of the first retention rate is 90%-98%.

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