Suspension filling system and filling method

Abstract

The invention provides a suspension filling system and a filling method.The suspension filling system comprises a liquid storage tank, a buffer tank, a filling pump and a filling needle, the buffer tank is provided with a liquid inlet and a liquid outlet, the bottom of the liquid storage tank is connected with the liquid inlet of the buffer tank through a liquid conveying pipeline, the liquid outlet of the buffer tank is connected with the filling needle through a filling pipeline, and the filling needle is connected with the liquid storage tank. The filling pump is arranged on the filling pipeline; the bottom of the liquid storage tank is higher than the liquid inlet of the buffer tank, and the liquid conveying pipeline has an inclined gradient, so that the suspension in the liquid conveying pipeline can flow into the buffer tank under the action of self gravity; stirrers are arranged in the liquid storage tank and the buffer tank, the liquid storage tank is provided with a first valve, the first valve is used for opening or closing the liquid storage tank, the buffer tank comprises a first weighing assembly, and the first weighing assembly is used for measuring the weight of the suspension in the buffer tank. According to the invention, the suspension waste is reduced, and the filling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medicine and food packaging, and in particular to a suspension filling system and a filling method. Background Art

[0002] Suspension-type medicines generally contain insoluble drug particles dispersed in liquid, forming an unevenly dispersed liquid medicine. The particles do not clump after sinking, and can be evenly dispersed with a little shaking. The particle size remains unchanged during long-term storage. When storing suspensions, the suspension needs to be filled into filling bottles through a suspension filling system for batch production and storage.

[0003] The existing suspension-type liquid medicine filling is generally carried out through a suspension filling system. Usually, the suspension is stirred for a period of time, then enters the liquid dispenser, and then is injected into the filling needle for filling. However, the existing suspension filling system has the following problems: when the filling is stopped for a long time, the suspension in the pipeline between the bottom of the buffer tank and the liquid dispenser cannot be shaken and will be stratified, precipitated or even caked, resulting in uneven filling dosage. In order to avoid this phenomenon, the suspension in the entire filling system and the liquid dispenser can only be manually emptied, resulting in a waste of suspension; and in the tail liquid filling stage, the liquid medicine in the buffer tank cannot be fully stirred, and stratification and sedimentation may occur, making the suspension in the tail liquid filling stage basically unusable, resulting in a waste of suspension. Although the prior art pumps all the suspension in the upstream end pipeline of the buffer tank into the buffer tank before filling, which can reduce the waste of suspension, after the suspension in the upstream end pipeline is pumped into the buffer tank, it needs to be stirred for a period of time before restarting the filling, which prolongs the production time and affects the filling efficiency. Summary of the invention

[0004] The present invention aims to provide a suspension filling system and a filling method which can reduce the waste of suspension and avoid affecting the filling efficiency.

[0005] In order to solve the above problems, the first aspect of the present invention provides a suspension filling system, comprising a liquid storage tank, a buffer tank, a filling pump and a filling needle, wherein the buffer tank has a liquid inlet and a liquid outlet, the bottom of the liquid storage tank is connected to the liquid inlet of the buffer tank through an infusion pipeline, the liquid outlet of the buffer tank is connected to the filling needle through a filling pipeline, and the filling pump is arranged on the filling pipeline;

[0006] The bottom of the liquid storage tank is higher than the liquid inlet of the buffer tank, and the infusion pipeline has an inclined slope, so that the suspension in the infusion pipeline can flow into the buffer tank under the action of its own gravity;

[0007] Agitators are provided in both the liquid storage tank and the buffer tank. A first valve is provided at the bottom of the liquid storage tank, and the first valve is used to open or close the liquid storage tank. The buffer tank includes a first weighing component, and the first weighing component is used to measure the weight of the suspension in the buffer tank.

[0008] Further, the infusion pipeline includes at least one inclined section, the inclined section is inclined downward, the inclined section is connected to the bottom of the liquid storage tube through an arc transition, and / or the inclined section is connected to the liquid inlet of the buffer tank through an arc transition;

[0009] Or, the infusion pipeline includes at least one inclined section and at least one vertical section, the vertical section is connected to the bottom of the liquid storage tank, and / or the vertical section is connected to the liquid inlet of the buffer tank; the inclined section is connected to the vertical section through an arc transition, and / or the inclined section is connected to the bottom of the liquid storage tank through an arc transition, and / or the inclined section is connected to the liquid inlet of the buffer tank through an arc transition. .

[0010] Furthermore, the slope of the infusion pipeline is 0.1% to 3%.

[0011] Furthermore, the sum of the first stirring amount of the liquid storage tank and the second stirring amount of the buffer tank is not greater than the volume of the buffer tank, the first stirring amount is the minimum stirring amount of the liquid storage tank, and the second stirring amount is the minimum stirring amount of the buffer tank.

[0012] Furthermore, a second valve is provided on the infusion pipeline, and the second valve is used to adjust the flow rate of the suspension flowing into the buffer tank. The liquid inlet of the buffer tank is located above the maximum liquid level of the buffer tank, and the liquid inlet of the buffer tank is arranged close to the inner wall of the buffer tank.

[0013] Furthermore, it also includes a bottle conveyor line, on which a plurality of filling stations are arranged, the number of the filling pipelines, the filling pumps and the filling needles are the same as the number of the filling stations, the filling needles are arranged one-to-one above the filling stations, and a second weighing component is arranged on the filling stations.

[0014] Furthermore, it also includes a controller, and the liquid storage tank, the filling pump, the first weighing component, the second weighing component and the bottle conveying line are all electrically connected to the controller.

[0015] The second aspect of the present invention provides a suspension filling method, which uses the suspension filling system as described in the first aspect for filling, and comprises the following steps:

[0016] Measuring the weight of the suspension in the buffer tank by the first weighing component;

[0017] When the weight of the suspension in the buffer tank is lower than a first preset value, the first valve is opened, and the suspension in the liquid storage tank is transported to the buffer tank through the transport pipeline for replenishment, until the weight of the suspension in the buffer tank reaches a second preset value, and the first valve is closed, and the suspension in the transport pipeline flows into the buffer tank under the action of its own gravity, and during the process of replenishing the buffer tank, the suspension in the buffer tank is filled while being stirred.

[0018] Furthermore, it also includes:

[0019] Determining the weight of the suspension in the liquid storage tank, and when the weight of the suspension in the liquid storage tank is lower than the first stirring amount, opening the first valve, and transporting all the suspension in the liquid storage tank to the buffer tank through the transport pipeline;

[0020] When the weight of the suspension in the buffer tank is lower than the second stirring amount, the filling continues for no longer than a preset time, and the preset time is determined according to the sedimentation time of the particles in the suspension.

[0021] Furthermore, it also includes:

[0022] Determining the duration of the suspension filling system pause;

[0023] When the pause time is longer than the preset time, the suspension in the filling pipeline, the filling pump and the filling needle is emptied, and then the suspension in the buffer tank is transported to the filling needle for filling.

[0024] The suspension filling system described in the present invention sets the bottom of the liquid storage tank higher than the liquid inlet of the buffer tank, and sets the infusion pipeline connecting the liquid storage tank and the buffer tank as an inclined pipeline, so that the suspension in the infusion pipeline can all flow into the buffer tank under the action of its own gravity, so that the infusion pipeline is emptied, and the sedimentation problem of the suspension in the infusion pipeline can be avoided, and the waste of the suspension is reduced. There is no need to set a reflux pipeline and a circulation pump between the liquid storage tank and the buffer tank, and the suspension in the infusion pipeline can all flow into the buffer tank, which not only simplifies the operation, but also makes the overall structure simpler, and reduces the cost of the suspension filling system; and in the process of the suspension in the infusion pipeline flowing into the buffer tank, the agitator in the buffer tank can be used to achieve stirring and filling at the same time, and there is no need to start the filling after the suspension in the infusion pipeline has all flowed into the buffer tank and stirred for a period of time, which is conducive to shortening the production time and improving the filling efficiency. In addition, by setting a first valve on the liquid storage tank and detecting the weight of the suspension in the buffer tank through the first weighing component, the weight of the suspension in the buffer tank can be adjusted in real time, which not only can replenish the suspension in the buffer tank in time to ensure the stability and continuity of filling, which is conducive to improving the efficiency of filling, but also can avoid the amount of suspension in the buffer tank being too small, causing the particles to sink and affecting the quality of filling.

[0025] The suspension filling method described in the present invention can measure the weight of the suspension in the buffer tank in real time through the first weighing component, and open or close the first valve according to the weight of the suspension in the buffer tank. As long as the weight of the suspension in the buffer tank is lower than the first preset value, the buffer tank is replenished, and as long as the weight of the suspension in the buffer tank reaches the second preset value, the replenishment of the buffer tank is stopped. The method can realize automatic replenishment of the buffer tank, which not only ensures the continuity and stability of the filling, improves the filling efficiency, but also reduces the risk of manual intervention and operation. In addition, the suspension in the buffer tank is always kept within a certain range, which is beneficial to reduce the particle sedimentation phenomenon of the suspension, thereby helping to further improve the quality of filling. In addition, since the delivery pipeline is configured as an inclined pipeline, the suspension in the delivery pipeline can be completely emptied after each fluid replenishment. During abnormal shutdown or pause, the sedimentation problem of the suspension in the infusion pipeline can be avoided, reducing the waste of the suspension. There is no need to perform separate operations, and the suspension in the infusion pipeline between the storage tank and the buffer tank is pumped into the buffer tank, which simplifies the operation and improves the filling efficiency. There is no need to wait for the suspension in the infusion pipeline to flow into the buffer tank and then stir it for a period of time before starting the filling, which is beneficial to shortening the production time and improving the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a suspension filling system provided in an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the suspension filling method provided in an embodiment of the present invention;

[0028] Figure 3 The present invention is a flow chart of a suspension filling method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship 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 of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the present invention, the meaning of "at least one" is one or more, and the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of this specification, the term "as an optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one optional embodiment or optional example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] Combination Figure 1 As shown, the first aspect of this embodiment provides a suspension filling system, comprising: a liquid storage tank 10, a buffer tank 30, a filling pump 50 and a filling needle 60, wherein:

[0032] The buffer tank 30 has a liquid inlet and a liquid outlet. The bottom of the liquid storage tank 10 is connected to the liquid inlet of the buffer tank 30 through the infusion pipeline 20. The liquid outlet of the buffer tank 30 is connected to the filling needle 60 through the filling pipeline 40. The filling pump 50 is arranged on the filling pipeline 40.

[0033] The bottom of the liquid storage tank 10 is higher than the height of the liquid inlet of the buffer tank 30, and the infusion pipeline 20 has an inclined slope, so that the suspension in the infusion pipeline 20 can flow into the buffer tank 30 under the action of its own gravity;

[0034] The liquid storage tank 10 and the buffer tank 30 are both provided with a stirrer 100 . The liquid storage tank 10 has a first valve for opening or closing the liquid storage tank 10 . The buffer tank 30 includes a first weighing component for measuring the weight of the suspension in the buffer tank 30 .

[0035] The suspension filling system provided in the present embodiment sets the bottom of the liquid storage tank higher than the liquid inlet of the buffer tank, and sets the infusion pipeline connecting the liquid storage tank and the buffer tank as an inclined pipeline, so that the suspension in the infusion pipeline can all flow into the buffer tank under the action of its own gravity, so that the infusion pipeline is emptied, and the sedimentation problem of the suspension in the infusion pipeline can be avoided, and the waste of the suspension is reduced. There is no need to set a reflux pipeline and a circulation pump between the liquid storage tank and the buffer tank, and the suspension in the infusion pipeline can all flow into the buffer tank, which not only simplifies the operation, but also makes the overall structure simpler, and reduces the cost of the suspension filling system; and in the process of the suspension in the infusion pipeline flowing into the buffer tank, the agitator in the buffer tank can be used to achieve stirring and filling at the same time, and there is no need to start the filling after the suspension in the infusion pipeline has all flowed into the buffer tank and stirred for a period of time, which is conducive to shortening the production time and improving the filling efficiency. In addition, by setting a first valve on the liquid storage tank and detecting the weight of the suspension in the buffer tank through the first weighing component, the weight of the suspension in the buffer tank can be adjusted in real time, which not only can replenish the suspension in the buffer tank in time to ensure the stability and continuity of filling, which is conducive to improving the efficiency of filling, but also can avoid the amount of suspension in the buffer tank being too small, causing the particles to sink and affecting the quality of filling.

[0036] Based on the above embodiment, as an optional implementation, the infusion pipeline 20 includes at least one inclined section, and the inclined section is inclined downward.

[0037] On the basis of the above-mentioned embodiment, the inclined section is connected to the bottom of the liquid storage tank 10 by an arc transition, and / or the inclined section is connected to the liquid inlet of the buffer tank 30 by an arc transition. Specifically, the infusion pipeline 20 can be an inclined pipeline, then at this time, the infusion pipeline 20 is connected to the bottom of the liquid storage tank 10 by an arc transition, and the infusion pipeline 20 is connected to the liquid inlet of the buffer tank 30 by an arc transition. If the infusion pipeline 20 includes multiple inclined sections, the multiple inclined sections can also be connected by an arc transition. Therefore, the infusion pipeline 20 adopts this setting mode, which is more conducive to the flow of the suspension, so as to reduce resistance and make the suspension flow more smoothly into the buffer tank 30. The arc transition connection at the corner is conducive to further improving the fluidity of the suspension, and can reduce the accumulation of particles in the suspension at the corner.

[0038] As an optional embodiment, the infusion pipeline includes at least one inclined section and at least one vertical section, the inclined section and the vertical section are connected by an arc transition; the vertical section is connected to the bottom of the liquid storage tank, and / or the vertical section is connected to the liquid inlet of the buffer tank; and / or, the inclined section is connected to the bottom of the liquid storage tank by an arc transition, and / or, the inclined section is connected to the liquid inlet of the buffer tank by an arc transition.

[0039] On the basis of the above embodiment, as an optional implementation, the infusion pipeline 20 may also include two vertical sections and one inclined section, the inclined section is arranged between the two vertical sections, one of the vertical sections is connected to the bottom of the liquid storage tank 10, the other vertical section is connected to the liquid inlet of the buffer tank 30, and the inclined section is connected to both vertical sections through an arc transition. The infusion pipeline 20 may also include a vertical section and an inclined section, one end of the vertical section is connected to the bottom of the liquid storage tank 10, the other end of the vertical section is connected to the inclined section through an arc transition, and the other end of the inclined section is connected to the liquid inlet of the buffer tank 30 through an arc transition; or, one end of the inclined section is connected to the bottom of the liquid storage tank 10 through an arc transition, the other end of the inclined section is connected to the vertical section through an arc transition, and the other end of the vertical section is connected to the liquid inlet of the buffer tank 30.

[0040] On the basis of the above embodiment, as an optional implementation, the slope of the infusion pipeline 20 is 0.1% to 3%, that is, the horizontal distance is 100 meters, and the vertical direction rises or falls by 0.1 meters to 3 meters. Preferably, the slope of the infusion pipeline 20 is 1%. Among them, the slope of the infusion pipeline 20 refers to the slope of the infusion pipeline 20 as a whole. No matter how many inclined sections the infusion pipeline 20 has, the slope of the infusion pipeline 20 is within the above range. Therefore, setting the slope of the infusion pipeline 20 within the above range can avoid the suspension in the infusion pipeline 20 from flowing down too fast, causing splashing and generating bubbles, and can also avoid the suspension in the infusion pipeline 20 from flowing down too slowly, causing the suspension to be laminar and sedimentation, or the rehydration speed is too slow, affecting the filling efficiency.

[0041] It should be noted that, in this embodiment, the inner diameter and the total length of the infusion pipeline 20 are not further limited, and those skilled in the art can determine them based on test data of multiple fluid infusions.

[0042] On the basis of the above embodiment, as an optional implementation, a second valve 70 is provided on the infusion pipeline 20, and the second valve 70 is used to adjust the flow rate of the suspension flowing into the buffer tank 30. Therefore, by cooperating with the second valve 70 and the inclined infusion pipeline 20, it is possible to avoid the flow rate of the suspension being too fast, resulting in bubbles in the suspension, which is conducive to achieving stable filling, thereby facilitating improving the filling quality and filling qualified rate, and it is also possible to avoid the flow rate of the suspension being too slow, causing the suspension to be laminar and sediment, or the fluid replenishment speed being too slow, affecting the filling efficiency. As a preferred implementation, the flow rate of the suspension in the infusion pipeline 20 flowing into the buffer tank 30 is 0.1L / min to 2L / min.

[0043] On the basis of the above embodiment, as an optional implementation, the liquid inlet of the buffer tank 30 is located above the maximum liquid level of the buffer tank 30, and the liquid inlet of the buffer tank 30 is arranged close to the inner wall of the buffer tank 30, so that the liquid inlet of the buffer tank 30 is arranged close to the wall of the buffer tank 30. Therefore, setting the liquid inlet of the buffer tank 30 above the maximum liquid level of the buffer tank 30 can reduce the bubbles generated by the suspension, which is conducive to improving the quality and qualified rate of filling. Setting the liquid inlet of the buffer tank 30 close to the inner wall of the buffer tank 30 can avoid the suspension flowing into the buffer tank 30 from splashing, and further reduce the bubbles generated by the suspension, thereby further improving the stability and quality of filling.

[0044] On the basis of the above embodiment, as an optional implementation, the sum of the first stirring amount of the liquid storage tank 10 and the second stirring amount of the buffer tank 30 is not greater than the volume of the buffer tank 30. Among them, the first stirring amount is the minimum stirring amount of the liquid storage tank 10, and the second stirring amount is the minimum stirring amount of the buffer tank 30. In this embodiment, the specific values ​​of the minimum stirring amount of the liquid storage tank 10 and the minimum stirring amount of the buffer tank 30 are not further limited. Those skilled in the art can set them according to actual conditions. The suspension in the liquid storage tank 10 cannot be stirred evenly or the stirring effect is poor if it is lower than the minimum stirring amount, and the suspension in the buffer tank 30 cannot be stirred evenly or the stirring effect is poor if it is lower than the minimum stirring amount. Therefore, when the suspension in the liquid storage tank 10 reaches the minimum stirring amount, when the suspension in the liquid storage tank 10 flows to the buffer tank 30, overflow of the suspension in the buffer tank 30 can be avoided.

[0045] Based on the above embodiment, as an optional implementation, the liquid storage tank 10 includes a third weighing component, which is used to measure the weight of the suspension in the liquid storage tank 10. Therefore, by setting the third weighing component, the weight of the suspension in the liquid storage tank 10 can be measured in time, so as to understand the remaining situation of the suspension in the liquid storage tank 10 in time.

[0046] On the basis of the above embodiment, as an optional implementation mode, the suspension filling system also includes a bottle conveying line 80, on which a plurality of filling stations are arranged, the number of filling pipelines 40, filling pumps 50 and filling needles 60 are the same as the number of filling stations, the filling pipeline 40 includes a pump inlet pipe and a pump outlet pipe, the outlet of the buffer tank 30 is connected to the canning pump through the pump inlet pipe, the canning pump is connected to the filling needle 60 through the pump outlet pipe, the filling needles 60 are all arranged one by one above the filling station, the bottle is conveyed by the bottle conveying line 80, when the bottle arrives at the filling station, it is filled by the filling needle 60 above the filling station, after the filling is completed, it is output by the bottle conveying line 80, so as to ensure the continuity of filling and improve the efficiency of filling. Each filling station is provided with a second weighing assembly 90, which is used to measure the weight of the bottle at the filling station, including the weight of the empty bottle and the weight of the bottle after filling, to ensure that the filling amount is within a preset range. Therefore, in this embodiment, by providing multiple filling stations and multiple filling needles 60 correspondingly provided above the filling stations, multiple bottles can be filled simultaneously, which is conducive to further improving the filling efficiency.

[0047] In this embodiment, the buffer tank 30 may have multiple liquid outlets, or may have one liquid outlet, and the multiple filling pipelines 40 are connected to the buffer tank 30 through the liquid outlet of the buffer tank 30. Those skilled in the art may set the specific number of the liquid outlets of the buffer tank 30 according to actual conditions.

[0048] On the basis of the above embodiment, as an optional implementation, the suspension filling system further includes a controller, and the liquid storage tank 10, the filling pump 50, the first weighing component, the second weighing component and the bottle conveying line 80 are all electrically connected to the controller. Therefore, after the first weighing component measures the weight of the suspension in the buffer tank 30, it is fed back to the controller, and the controller issues an instruction to open or close the first valve according to the weight of the suspension in the buffer tank 30, so as to open or close the liquid storage tank 10 automatically or manually by the system. When the bottle arrives at the filling station, the controller issues an instruction to start filling to the filling pump 50, and the suspension in the buffer tank 30 is filled into the bottle through the filling needle 60. At the same time, the second weighing component measures the weight of the bottle after filling in real time. When the weight of the bottle after filling reaches a preset range, it can be fed back to the controller, and the controller issues an instruction to stop filling to the filling pump 50. When the third weighing component measures that the weight of the suspension in the liquid storage tank 10 reaches or is lower than the minimum stirring amount, it is fed back to the controller, and the controller issues an instruction to open the first valve, so as to open the liquid storage tank 10 automatically or manually by the system, and all the suspension in the liquid storage tank 10 is transported to the buffer tank 30.

[0049] In this embodiment, the specific type of the controller is not further limited, and technicians in this field can set it according to actual conditions. For example, the controller can be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.

[0050] Combination Figure 2 As shown, the second aspect of this embodiment provides a suspension filling method, which is filled using the suspension canning system as described in the first aspect. The suspension filling method includes the following steps:

[0051] Step S210, measuring the weight of the suspension in the buffer tank 30 by a first weighing component;

[0052] Step S220, when the weight of the suspension in the buffer tank 30 is lower than the first preset value, the first valve is opened, and the suspension in the liquid storage tank 10 is transported to the buffer tank 30 through the delivery pipeline 20 for fluid replenishment, until the weight of the suspension in the buffer tank 30 reaches the second preset value, and the first valve is closed, and the suspension in the delivery pipeline 20 flows into the buffer tank 30 under the action of its own gravity, and during the process of fluid replenishment in the buffer tank 30, the suspension in the buffer tank 30 is filled while being stirred.

[0053] The first preset value is the lower limit of the weight of the suspension in the buffer tank 30, and the second preset value is the upper limit of the weight of the suspension in the buffer tank 30. In this embodiment, the specific values ​​of the first preset value and the second preset value are not further limited, and those skilled in the art can set them according to actual conditions.

[0054] The suspension filling method provided in the present embodiment can measure the weight of the suspension in the buffer tank in real time through the first weighing component, and open or close the first valve according to the weight of the suspension in the buffer tank. As long as the weight of the suspension in the buffer tank is lower than the first preset value, the buffer tank is replenished, and as long as the weight of the suspension in the buffer tank reaches the second preset value, the replenishment of the buffer tank is stopped. The method can realize automatic replenishment of the buffer tank, which not only ensures the continuity and stability of the filling, improves the filling efficiency, but also reduces the risk of manual intervention and operation. In addition, the suspension in the buffer tank is always kept within a certain range, which is beneficial to reduce the particle sedimentation phenomenon of the suspension, thereby helping to further improve the quality of filling. In addition, since the delivery pipeline is configured as an inclined pipeline, the suspension in the delivery pipeline can be completely emptied after each fluid replenishment. During abnormal shutdown or pause, the sedimentation problem of the suspension in the infusion pipeline can be avoided, reducing the waste of the suspension. There is no need to perform separate operations, and the suspension in the infusion pipeline between the storage tank and the buffer tank is pumped into the buffer tank, which simplifies the operation and improves the filling efficiency. There is no need to wait for the suspension in the infusion pipeline to flow into the buffer tank and then stir it for a period of time before starting the filling, which is beneficial to shortening the production time and improving the filling efficiency.

[0055] Based on the above embodiment, as an optional implementation, the suspension filling method further includes:

[0056] Determine the weight of the suspension in the liquid storage tank 10. When the weight of the suspension in the liquid storage tank 10 is lower than the first stirring amount, open the first valve, and the suspension in the liquid storage tank 10 is completely transported to the buffer tank 30 through the transport pipeline 20.

[0057] When the weight of the suspension in the buffer tank 30 is lower than the second stirring amount, the duration of continued filling (including the pause duration) does not exceed the preset duration.

[0058] The first stirring amount is the minimum stirring amount of the liquid storage tank 10 , and the second stirring amount is the minimum stirring amount of the buffer tank 30 .

[0059] Therefore, when the weight of the suspension in the liquid storage tank 10 is lower than the first stirring amount, the suspension in the liquid storage tank 10 is completely transferred to the buffer tank 30, which can reduce the waste of the suspension and help reduce costs. When the weight of the suspension in the buffer tank 30 is lower than the second stirring amount, the filling time does not exceed the preset time, which can avoid the suspension from settling and affecting the quality of the filling.

[0060] It should be noted that the preset time length is determined according to the sinking time of the particles in the suspension, where the sinking time is: in a static state, the content of the upper, middle and lower layer particles of the suspension is detected at different time points. At a certain time point, there is no obvious difference in the content of the upper, middle and lower layer particles, but at the next time point there is an obvious difference, then this time point is the sinking time.

[0061] Based on the above embodiment, as an optional implementation, the suspension filling method further includes:

[0062] Determine the suspension duration of the suspension filling system;

[0063] When the pause time is longer than the preset time, the suspension in the filling pipeline 40, the filling pump 50 and the filling needle 60 is emptied, and then the suspension in the buffer tank 30 is transported to the filling needle 60 for filling.

[0064] Therefore, when an abnormal shutdown or pause period occurs and the duration exceeds the preset time, the suspension in the filling pipeline 40, the filling pump 50 and the filling needle 60 may be stratified. After the suspension in the filling pipeline 40, the filling pump 50 and the filling needle 60 is drained, the suspension in the buffer tank 30 is transported to the filling needle 60 for normal filling or tail liquid filling, which can ensure the quality of the filling and help improve the qualified rate of the filling.

[0065] In this embodiment, those skilled in the art can determine the pause duration of the suspension filling system by using a timer.

[0066] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A suspension filling system, characterized in that: It includes a liquid storage tank, a buffer tank, a filling pump and a filling needle. The buffer tank has a liquid inlet and a liquid outlet. The bottom of the liquid storage tank is connected to the liquid inlet of the buffer tank through an infusion pipeline. The liquid outlet of the buffer tank is connected to the filling needle through a filling pipeline. The filling pump is arranged on the filling pipeline. The bottom of the liquid storage tank is higher than the liquid inlet of the buffer tank, and the infusion pipeline has an inclined slope, so that the suspension in the infusion pipeline can flow into the buffer tank under the action of its own gravity; Agitators are provided in both the liquid storage tank and the buffer tank. The liquid storage tank has a first valve, which is used to open or close the liquid storage tank. The buffer tank includes a first weighing component, which is used to measure the weight of the suspension in the buffer tank.

2. The suspension filling system according to claim 1, characterized in that: The infusion pipeline includes at least one inclined section, the inclined section is inclined downward, the inclined section is connected to the bottom of the liquid storage tank through an arc transition, and / or the inclined section is connected to the liquid inlet of the buffer tank through an arc transition; Or, the infusion pipeline includes at least one inclined section and at least one vertical section, the vertical section is connected to the bottom of the liquid storage tank, and / or the vertical section is connected to the liquid inlet of the buffer tank; the inclined section is connected to the vertical section via an arc transition, and / or the inclined section is connected to the bottom of the liquid storage tank via an arc transition, and / or the inclined section is connected to the liquid inlet of the buffer tank via an arc transition.

3. The suspension filling system according to claim 1, characterized in that: The slope of the inclined section of the infusion pipeline is 0.1% to 3%.

4. The suspension filling system according to claim 1, characterized in that: The sum of the first stirring amount of the liquid storage tank and the second stirring amount of the buffer tank is not greater than the volume of the buffer tank, the first stirring amount is the minimum stirring amount of the liquid storage tank, and the second stirring amount is the minimum stirring amount of the buffer tank.

5. The suspension filling system according to claim 1, characterized in that: A second valve is provided on the infusion pipeline, and the second valve is used to adjust the flow rate of the suspension flowing into the buffer tank. The liquid inlet of the buffer tank is located above the maximum liquid level of the buffer tank, and the liquid inlet of the buffer tank is arranged close to the inner wall of the buffer tank.

6. The suspension filling system according to claim 1, characterized in that: It also includes a bottle conveyor line, on which a plurality of filling stations are arranged, the number of the filling pipelines, the filling pumps and the filling needles are the same as the number of the filling stations, the filling needles are arranged one-to-one above the filling stations, and a second weighing component is arranged on the filling stations.

7. The suspension filling system according to claim 6, characterized in that: It also includes a controller, and the liquid storage tank, the filling pump, the first weighing component, the second weighing component and the bottle conveying line are all electrically connected to the controller.

8. A suspension filling method, characterized in that: Filling is performed using the suspension filling system according to any one of claims 1 to 7, comprising the following steps: Measuring the weight of the suspension in the buffer tank by the first weighing component; When the weight of the suspension in the buffer tank is lower than a first preset value, the first valve is opened, and the suspension in the liquid storage tank is transported to the buffer tank through the transport pipeline for replenishment, until the weight of the suspension in the buffer tank reaches a second preset value, and the first valve is closed, and the suspension in the transport pipeline flows into the buffer tank under the action of its own gravity, and during the process of replenishing the buffer tank, the suspension in the buffer tank is filled while being stirred.

9. The suspension filling method according to claim 8, characterized in that: Also includes: Determining the weight of the suspension in the liquid storage tank, and when the weight of the suspension in the liquid storage tank is lower than the first stirring amount, opening the first valve, and transporting all the suspension in the liquid storage tank to the buffer tank through the transport pipeline; When the weight of the suspension in the buffer tank is lower than the second stirring amount, the filling continues for no longer than a preset time, and the preset time is determined according to the sedimentation time of the particles in the suspension.

10. The suspension filling method according to claim 9, characterized in that: Also includes: Determining the duration of the suspension filling system pause; When the pause time is longer than the preset time, the suspension in the filling pipeline, the filling pump and the filling needle is emptied, and then the suspension in the buffer tank is transported to the filling needle for filling.

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