Feeding device of packaging machine and using method

Abstract

The invention relates to the technical field of liquid material canning, in particular to a feeding device of a packaging machine, which comprises two feeding bins and two feeding heads connected with the discharging ends of the feeding bins, a discharging pipeline of each feeding bin is communicated with one feeding head, a feeding pump is mounted on each feeding head, and the feeding heads are connected with the discharging ends of the feeding bins. The two discharging pipelines are communicated through an auxiliary pipeline, and a three-way switching valve is installed at the intersection position of the auxiliary pipeline and the discharging pipelines. The using method of the feeding device of the packaging machine comprises the following using modes: a single feeding head working mode; the double feeding heads respectively work in a working mode; according to the fine control mode, the two feeding heads work in turn, one feeding head serves as a coarse feeding head, and the other feeding head serves as a fine feeding head. According to the feeding device and the using method, switching time consumption can be reduced, discharge of cleaning water and sewage needed by cleaning can be reduced, the feeding accuracy can be improved, and the requirements of multiple using scenes can be met.

Description

Technical Field

[0001] The invention relates to the technical field of liquid material canning, and in particular to a feeding device of a packaging machine and a use method thereof. Background Art

[0002] In the feeding device of the packaging machine, there is a step of adding materials into the packaging bag. For the addition of a liquid material, usually only one feeding head is provided, and the feeding head is specifically used for adding the specific material.

[0003] When raw materials need to be switched but the feeding head does not switch, the pipeline through which the original raw materials flow often needs to be flushed with a large amount of clean water. This type of cleaning is generally not only time-consuming but also wastes a lot of water resources and generates a large amount of sewage, which is not in line with the efficient production and environmental protection concepts of modern society.

[0004] In order to solve the above problems, the prior art has the situation of setting up spare silos, that is, each silo supplies materials to the same feeding head through its own independent pipeline. In this way, when the raw materials need to be replaced, only the common section where the feeding head is installed needs to be cleaned, which reduces the flushing time, reduces the use of cleaning water and the amount of sewage discharged. However, this method is only suitable for switching use, and its practicality is still relatively low.

[0005] In order to solve the above problem, there is a method of separately setting up a feeding bin and a feeding head, that is, when switching, a spare pipeline and a spare feeding head are used for quick switching, which saves the time occupied in production due to cleaning. However, this situation has low efficiency in the use of spare pipelines and spare feeding heads, and increases the idle cost of the enterprise. Summary of the invention

[0006] The present invention intends to provide a feeding device for a packaging machine, so as to provide a feeding device that can reduce switching time, reduce the discharge of cleaning water and sewage required for cleaning, improve the accuracy of feeding, and meet the needs of multiple usage scenarios.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme:

[0008] A feeding device for a packaging machine comprises a feeding bin and a feeding head connected to a discharge end of the feeding bin, wherein there are two feeding bins and two feeding heads, a discharge pipeline of each feeding bin is connected to a feeding head, each feeding head is equipped with a feeding pump, the two discharge pipelines are connected through an auxiliary pipeline, and a three-way switching valve is installed at the intersection of the auxiliary pipeline and the discharge pipeline.

[0009] The principle and advantage of this solution are: when this solution is adopted, when only one feeding head is needed to complete the feeding of the packaging machine, the raw materials in one of the feeding bins only need to flow through the discharge pipeline and then flow out of the feeding head. When the raw materials need to be switched, because this solution has another feeding head, and the feeding head is connected to another discharge pipeline and another feeding bin, at this time, only the other raw material needs to be switched to be put into production immediately, thereby improving production efficiency.

[0010] If two different raw materials are to be injected, the three-way switching valve can be controlled so that the raw materials added by the two feeding heads have their own paths, for example, one feeding head corresponds to one feeding bin, thereby improving the utilization rate.

[0011] When precise control of the feeding is required, the two feeding heads can be connected to the same feeding bin, and one of the feeding heads can be used as a coarse feeding head and the other as a fine feeding head, so as to ensure the feeding speed and feeding accuracy by selecting different precision of the feeding pumps on the feeding heads.

[0012] When two feeding heads are both pouring one raw material, the two feeding heads can work in turn by controlling the switching state of the switching valve, and the raw materials flowing out of the two feeding heads are all from the same feeding bin; when switching raw materials, it is only necessary to flush the discharge pipeline, the switching valve connected to the discharge pipeline and the feeding head, and there is no need to flush the feeding bin used for the previous raw material, which helps to reduce the amount of flushing water used and sewage generated, and helps to shorten the flushing time compared to starting the flushing from the feeding bin.

[0013] In summary, the feeding device of this packaging machine can be used in a variety of application scenarios. It can not only meet the requirements of rapid switching of raw materials, but also require low water and sewage volume for flushing during switching, and can also help improve accuracy, greatly improving practicality.

[0014] Preferably, as an improvement, it also includes a liquid material production cylinder, the number of which is at least two, all of which are connected to the provided feeding main pipe, a discharge valve is provided at the discharge end of each liquid material production cylinder, the feed ends of the two feeding bins are connected to the feeding main pipe through the feeding branch pipe, and a shut-off valve is provided on a section of the feeding main pipe between adjacent feeding branches.

[0015] Beneficial effect: by setting more than one liquid material production cylinder, it is convenient to supply materials to different feeding bins through the liquid material production cylinder.

[0016] Preferably, as an improvement, a 90° elbow is installed at the feed port of the feeding bin, the horizontal section of the elbow is connected to the feed branch pipe, and the end of the elbow that bends downward opens toward the feeding bin.

[0017] Beneficial effect: In actual production, in order to load more stand-by raw materials under the same specifications, the feeding port of the feeding bin is often set higher. In order to facilitate cleaning and discharge, the top of the feeding bin is usually open and the top opening is covered with a cover. The capacity of the liquid material production cylinder is much larger than the capacity of the feeding bin, and the position of the liquid material production cylinder is also higher than the feeding bin. When the feeding bin is connected with the liquid material production cylinder, the liquid raw material in the liquid material production cylinder will be sprayed into the feeding bin at high speed and high pressure. The raw material will splash at the feeding port, and the raw material will splash onto the cover and drip along the cover, resulting in a waste of raw materials.

[0018] When this solution is adopted, because the pipe is bent at 90 degrees, when the raw materials are sprayed into the feeding bin, the flow rate of the raw materials is affected to a certain extent after the 90° pipe bend, and the spraying direction is turned 90 degrees to the bottom of the feeding bin, which completely avoids the situation where the raw materials are splashed onto the cover plate. In addition, the raw materials sprayed to the bottom of the feeding bin form an impact on the original raw materials in the feeding bin, which is equivalent to a certain stirring effect on the raw materials in the feeding bin, so that the raw materials in the feeding bin are not easy to settle.

[0019] Preferably, as an improvement, the feed end and the discharge end of the feeding bin are located on both sides of the feeding bin, so that the raw materials that impact downward after the elbow feeding will not splash into the feeding bin, and can form a certain stirring effect, but the feed end and the discharge end can be far apart to avoid the raw materials flowing out of the elbow from directly impacting the discharge end, thereby affecting the accuracy of subsequent feeding.

[0020] Preferably, as an improvement, a filter screen is provided in the feeding bin, and the discharge end of the feeding bin is located lower than the filter screen to filter the raw materials in the feeding bin.

[0021] Preferably, as an improvement, the cross-sectional area of ​​the feed main pipe is larger than the cross-sectional area of ​​the feed branch pipe, the feed main pipe and the feed branch pipe are connected at their junction by a trumpet-shaped eccentric connecting pipe, the large-sized end of the eccentric connecting pipe is connected to the feed main pipe, the small-sized end of the eccentric connecting pipe is connected to the feed branch pipe, the bottom of the eccentric connecting pipe is directly connected to the bottom of the feed main pipe or is inclined downward toward the feed branch pipe, so as to reduce or even avoid the residue of raw materials in the feed main pipe.

[0022] Preferably, as an improvement, a metal braided hose is connected between the eccentric connecting pipe and the feeding branch pipe.

[0023] Beneficial effects: The metal braided hose can not only improve the compressive strength compared to the plastic pipe, avoiding the problem of leakage caused by excessive pressure, but also use the metal braided hose to balance the different frequency vibrations between the feeding main pipe and the charging bin (the charging bin is often installed on the top of the packaging machine. When the packaging machine is working, the vibration generated by the equipment will be transmitted to the charging bin. If the charging bin and the feeding main pipe are hard-connected, the pipeline connection strength will be affected under long-term vibration), ensuring the long-term reliability of the pipeline connection. In addition, because the output ends of the feeding branch pipe and the eccentric connecting pipe are not necessarily at the same height and facing each other, the existing hard pipes have very high requirements for the size design when connecting the two ends. The present scheme uses a metal braided hose for connection. Due to the relative softness of the metal braided hose, the position requirements for the eccentric connecting pipe and the feeding branch pipe are greatly reduced. As long as the metal hose is long enough, the two can be connected, which greatly reduces the difficulty of processing and connecting the eccentric connecting pipe and the feeding branch pipe.

[0024] Preferably, as an improvement, both ends of the metal braided hose are connected to the eccentric connecting pipe and the feed branch pipe through quick connectors, which facilitates the disassembly and assembly of the metal braided hose, and also facilitates separate inspection of the feed main pipe or the feed branch pipe after disassembly and assembly of the metal braided hose.

[0025] The present invention also provides a method for using a feeding device of a packaging machine, which requires the feeding device of the packaging machine and includes the following use modes when used:

[0026] Single feeding head working mode: only one feeding head is working, the auxiliary pipeline is not connected, and the raw materials are fed from one of the feeding bins along the discharge pipeline and from the corresponding feeding head;

[0027] Double feeding head separate working mode: two feeding heads correspond to one feeding bin respectively, the auxiliary pipelines are not connected, and the two feeding bins feed materials independently without interfering with each other;

[0028] Fine control mode: The two feeding heads work in turn, one is used as a coarse feeding head and the other is used as a fine feeding head. The weight of raw materials added to the packaging bag by the coarse feeding head is much greater than the weight of the fine feeding head. When switching from the coarse feeding head to the fine feeding head, it is achieved by switching the three-way switching valve to control the auxiliary pipeline to connect with the discharge pipeline.

[0029] Preferably, as an improvement, both the coarse feed and the fine feed are extended into the packaging bag, and are kept a certain distance from the liquid surface after each feeding is completed, so as to prevent splashing during the feeding process.

[0030] Preferably, as an improvement, after the coarse feeding head completes feeding, the packaging bag is weighed, the weighing data is transmitted to the control module, the control module calculates the difference based on the weighing data and the preset weight, and the control module controls the feeding pump installed on the fine feeding head to infuse the difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a feeding device of a packaging machine according to an embodiment of the present invention.

[0032] Figure 2 This is a partial schematic diagram of the first embodiment of the present invention, showing the connection relationship between the feeding bin, the feeding branch pipe, and the feeding main pipe.

[0033] Figure 3 It is a schematic diagram of a feeding device of a packaging machine according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The figure marks in the drawings of the specification include: liquid material production cylinder 10, feeding bin 20, feeding bin cover 200, elbow 201, filter screen 202, float switch 203, overflow port 204, feeding head 30, feeding pump 301, feeding main pipe 1, discharge valve 11, shut-off valve 12, drain pipe 2, drain valve 21, feeding branch pipe 3, feed valve 31, discharge pipeline 4, auxiliary pipeline 5, three-way switching valve 41, eccentric connecting pipe 6, metal braided hose 7, cleaning pipeline 8, cleaning valve 81.

[0036] Embodiment 1

[0037] Combination Figure 1 A feeding device for a packaging machine includes a liquid material production cylinder 10, a feeding bin 20 and a feeding head 30. There are at least two liquid material production cylinders 10, and there are two feeding bins 20 and two feeding heads 30. In this embodiment, the liquid material production cylinder 10, the feeding bin 20 and the feeding head 30 are each provided with two as an example. The discharge ends of all liquid material production cylinders 10 are connected to a fixedly installed feeding main pipe 1, and a discharge valve 11 is provided at the discharge end of each liquid material production cylinder 10. The discharge valve 11 is connected to the feeding main pipe 1. The discharge end of each liquid material production cylinder 10 is also connected to a drain pipe 2, and a drain valve 21 is installed on the drain pipe 2. The drain valve 21 and the drain pipe 2 facilitate the cleaning and drainage of the liquid material production cylinder 10.

[0038] The feeding bin 20 is connected with the feeding main pipe 1 through the feeding branch pipe 3, and a feeding valve 31 is installed on each feeding branch pipe 3. A shut-off valve 12 is provided on a section of the feeding main pipe 1 between adjacent feeding branch pipes 3. The discharge end of each feeding bin 20 is connected with the corresponding feeding head 30 through the discharge pipeline 4, and a feeding pump 301 is installed on each feeding head 30. The two discharge pipelines 4 are connected through an auxiliary pipeline 5. A three-way switching valve 41 is installed at the intersection of the auxiliary pipeline 5 and the discharge pipeline 4. The three-way switching valve 41 is used to connect any two pipelines that can communicate with each other.

[0039] Combination Figure 2 The feeding port of the feeding bin 20 is provided with a 90° elbow 201, the horizontal section of the elbow 201 is connected to the feeding branch pipe 3, and the downwardly bent end of the elbow 201 opens toward the bottom of the feeding bin 20. The feeding end and the discharging end of the feeding bin 20 are located on both sides of the feeding bin 20.

[0040] A filter screen 202 is fixed in the feeding bin 20 , and the discharge end of the feeding bin 20 is located lower than the filter screen 202 . A float switch 203 for liquid level control is also installed on the feeding bin 20, and the float switch 203 is electrically connected to the control module. When the liquid level reaches the design requirement, the control module controls the feed valve 31 on the feeding branch pipe 3 to close; an overflow port 204 is also provided on the feeding bin 20, and a liquid level switch is installed on the overflow port 204. The overflow port 204 is connected to the overflow pipe, and an automatic overflow valve is installed on the overflow pipe. The automatic overflow valve and the liquid level switch are both connected to the control module, and the output end of the overflow pipe is connected to the material receiving container. The position of the material receiving container is lower than the feeding bin 20 (the overflow pipe and the material receiving container are not shown in the figure). After the float switch 203 fails or gets stuck, if the liquid level reaches the liquid level height sensed by the liquid level switch, the control module controls the feed valve 31 to control the corresponding discharge valve 11 on the feeding main pipe 1 connected to the feeding bin 20 in the overflow state to close. By controlling the feed valve 31 through the float switch 203 and the control module, the first-level protection of the liquid level in the feeding bin 20 is realized to avoid the waste of raw materials caused by overflow. The second-level protection after the failure of the first-level protection is realized through the setting of the overflow port, the liquid level switch, the automatic overflow valve and the control module. After the second-level protection is opened, the material receiving container is used to ensure that the overflowed raw materials are received in time to avoid the waste of raw materials.

[0041] The bottom of the feed port of the feeding bin 20 is parallel to or lower than the bottom of the feeding main pipe 1. The cross-sectional area of ​​the feeding main pipe 1 is larger than the cross-sectional area of ​​the feeding branch pipe 3.

[0042] The connecting position of the feeding main pipe 1 and the feeding branch pipe 3 is connected by a trumpet-shaped eccentric connecting pipe 6, the large-size end of the eccentric connecting pipe 6 is welded to the feeding main pipe 1, the small-size end of the eccentric connecting pipe 6 has a flange structure, and a metal braided hose 7 is connected between the small-size end of the eccentric connecting pipe 6 and the feeding branch pipe 3. The metal braided hose 7 is an equal-diameter hose, and both ends of the metal braided hose 7 are provided with quick connectors, and the metal braided hose 7 is connected to the eccentric connecting pipe 6 and the feeding branch pipe 3 through the quick connector.

[0043] The bottom of the eccentric connecting pipe 6 is directly connected to the bottom of the feeding main pipe 1 or tilted downward toward the metal braided hose 7, so that it is difficult for raw materials to remain in the feeding main pipe 1.

[0044] This embodiment also provides a method for using a feeding device of a packaging machine, including the following three modes:

[0045] Mode 1, single feeding head 30 working mode: only one feeding head 30 is working, the auxiliary pipeline 5 is not connected, and the raw materials are fed from one of the feeding bins 20 along the discharge pipeline 4 and from the corresponding feeding head 30 .

[0046] In mode, Figure 1 Taking the operation of the left feeding bin 20 and the feeding head 30 as an example, the right feeding bin 20 and the feeding head 30 are equivalent to spare pipelines, which are used for rapid switching of raw materials when switching is required.

[0047] Mode 2, dual feeding heads 30 working mode: the two feeding heads 30 correspond to one feeding bin 20 respectively, the auxiliary pipeline 5 is not connected, and the two feeding bins 20 feed materials independently without interfering with each other.

[0048] In this second mode, the three-way switching valve 41 ensures that the discharge end of the feeding bin 20 is directly connected to the corresponding feeding head 30 through the discharge pipeline 4, and the two feeding paths can be controlled separately.

[0049] Mode three, fine control mode: the two feeding heads 30 work in turn, one is used as a coarse feeding head 30, and the other is used as a fine feeding head 30. The weight of the raw materials added to the packaging bag by the coarse feeding head 30 is much greater than the feeding weight of the fine feeding head 30. When switching from the coarse feeding head 30 to the fine feeding head 30 for feeding, it is achieved by switching the three-way switching valve 41 to control the auxiliary pipeline 5 to be connected with the discharge pipeline 4.

[0050] In mode three, both the coarse feeding and the fine feeding are inserted into the packaging bag, and are at a certain distance from the liquid level after the feeding is completed, so as to prevent splashing during the feeding process. After the coarse feeding head 30 completes the feeding, the packaging bag is weighed, and the weighing data is transmitted to the control module provided, and the control module calculates the difference according to the weighing data and the preset weight, and the control module controls the feeding pump 301 installed on the fine feeding head 30 to infuse the difference.

[0051] The method of this embodiment enables the feeding device of the packaging machine to be applied to a variety of usage scenarios, which can not only meet the requirements of rapid switching of raw materials, but also require low water and sewage volumes for flushing during switching, and can also help improve accuracy, greatly improving practicality.

[0052] In addition, in the present embodiment, the eccentric connecting pipe 6 can avoid the residue of raw materials on the feeding main pipe 1, and the metal braided hose 7 can not only conveniently connect the feeding main pipe 1 and the feeding branch pipe 3, but also reduce the position requirements of the feeding main pipe 1 and the feeding main pipe 1, and meet the high pressure requirements when the liquid raw material flows through. In addition, the metal braided hose 7 can also form a soft connection between the pipelines of the feeding bin 20 and the liquid material production cylinder 10 to avoid the vibration caused by the installation of the feeding bin 20 on the packaging machine affecting the strength of the pipeline connection; in addition, the design of the 90° elbow 201 can avoid the situation where the raw materials are sprayed into the feeding bin 20 and then flow out along the cover plate 200, and can also use the raw materials sprayed downward by the elbow 201 to stir the original raw materials in the feeding bin 20 to avoid the precipitation of some components in the raw materials.

[0053] Embodiment 2

[0054] Combination Figure 2 The second embodiment makes the following improvements on the basis of the first embodiment: it also includes a cleaning pipeline connected to the feeding main pipe, the cleaning pipeline is connected to the discharge end of the liquid material production cylinder, each liquid level production cylinder corresponds to a cleaning pipeline, and a cleaning valve is installed on the cleaning pipeline.

[0055] By injecting cleaning liquid into the cleaning pipeline, the cleaning liquid flows into the feed main pipe through the opened cleaning valve flow channel, thereby facilitating a comprehensive cleaning of the flow path of the raw materials after the output of the liquid material production cylinder. The cleaning does not need to flow through the liquid material production cylinder, so it is helpful for rapid cleaning. In the cleaning process, segmented cleaning can be achieved by switching the valves on the feed main pipe and the feed branch pipe. For example, the feed valve can be closed, and part of the cleaning pipeline can be used as the flushing inlet and part of the cleaning pipeline can be used as the flushing outlet to quickly clean the feed main pipe. After the cleaning of the feed main is completed, the feed branch pipe, the discharge pipeline, etc. are cleaned, thereby improving the flexibility of cleaning.

[0056] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A feeding device for a packaging machine, comprising a feeding bin and a feeding head connected to a discharge end of the feeding bin, characterized in that: There are two feeding bins and two feeding heads. The discharge pipeline of each feeding bin is connected to a feeding head. Each feeding head is equipped with a feeding pump. The two discharge pipelines are connected through an auxiliary pipeline. A three-way switching valve is installed at the intersection of the auxiliary pipeline and the discharge pipeline.

2. A feeding device for a packaging machine according to claim 1, characterized in that: It also includes a liquid material production cylinder, there are at least two liquid material production cylinders, all of which are connected to the provided feeding main pipe, a discharge valve is provided at the discharge end of each liquid material production cylinder, the feed ends of the two feeding bins are connected to the feeding main pipe through the feeding branch pipe, and a shut-off valve is provided on a section of the feeding main pipe between adjacent feeding branches.

3. A feeding device for a packaging machine according to claim 2, characterized in that: A 90° elbow is installed at the feed inlet of the feeding bin, the horizontal section of the elbow is connected to the feed branch pipe, and the end of the elbow bent downward opens toward the feeding bin.

4. A feeding device for a packaging machine according to claim 3, characterized in that: The feeding end and the discharging end of the feeding bin are located on both sides of the feeding bin.

5. A feeding device for a packaging machine according to claim 4, characterized in that: A filter screen is arranged in the feeding bin, and the discharge end position of the feeding bin is lower than the filter screen position.

6. A feeding device for a packaging machine according to claim 4, characterized in that: The cross-sectional area of ​​the main feed pipe is larger than that of the branch feed pipe. The main feed pipe and the branch feed pipe are connected at their joints by a trumpet-shaped eccentric connecting pipe. The large-sized end of the eccentric connecting pipe is connected to the main feed pipe, and the small-sized end of the eccentric connecting pipe is connected to the branch feed pipe. The bottom of the eccentric connecting pipe is directly connected to the bottom of the main feed pipe or tilted downward toward the branch feed pipe.

7. A feeding device for a packaging machine according to claim 6, characterized in that: A metal braided hose is connected between the eccentric connecting pipe and the feeding branch pipe.

8. A method for using a feeding device of a packaging machine, characterized in that: A feeding device for a packaging machine as claimed in any one of claims 1 to 7 is required, and when used, the following usage modes are included: Single feeding head working mode: only one feeding head is working, the auxiliary pipeline is not connected, and the raw materials are fed from one of the feeding bins along the discharge pipeline and from the corresponding feeding head; Double feeding head separate working mode: two feeding heads correspond to one feeding bin respectively, the auxiliary pipelines are not connected, and the two feeding bins feed materials independently without interfering with each other; Fine control mode: The two feeding heads work in turn, one is used as a coarse feeding head and the other is used as a fine feeding head. The weight of raw materials added to the packaging bag by the coarse feeding head is much greater than the weight of the fine feeding head. When switching from the coarse feeding head to the fine feeding head, it is achieved by switching the three-way switching valve to control the auxiliary pipeline to connect with the discharge pipeline.

9. The method for using a feeding device of a packaging machine according to claim 8, characterized in that: The coarse feed and the fine feed are both extended into the packaging bag, and are both a certain distance away from the liquid surface after the respective feeds are completed.

10. The method for using a feeding device of a packaging machine according to claim 8, characterized in that: After the coarse feeding head completes the feeding, the packaging bag is weighed, and the weighing data is transmitted to the control module. The control module calculates the difference based on the weighing data and the preset weight, and the control module controls the feeding pump installed on the fine feeding head to fill the difference part.

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