Material feeding metering device

Abstract

The present invention discloses a material feeding and metering device, belonging to the field of material feeding and metering. The device comprises at least one volume target hopper and a plurality of micro-replenishment hoppers, wherein a rotating silo for filling materials for the volume target hopper and the micro-replenishment hopper is arranged above the volume target hopper and the micro-replenishment hopper, a first control panel that can be opened and closed is arranged at the material outlet of the volume target hopper and the micro-replenishment hopper, a weighing and metering hopper is arranged below the material outlet of the volume target hopper and the micro-replenishment hopper, a first weighing sensor is arranged on the weighing and metering hopper, a second control panel that can be opened and closed is arranged at the material outlet of the weighing and metering hopper, and a bag clamping device for clamping a packaging bag is arranged below the material outlet of the weighing and metering hopper. When the present invention performs bagging of materials, the material is fed through the volume target hopper, and the material in the plurality of micro-replenishment hoppers is added and adjusted to the material fed to the volume target hopper, and finally a weight closest to the target value is formed, thereby improving the feeding accuracy and speed.

Description

Technical Field

[0001] The invention relates to the field of material feeding metering, in particular to a material feeding metering device. Background Art

[0002] When powder, granular and small block materials are packaged in bags, feeding metering is required. Existing feeding metering devices include spiral feeding, vibration feeding, scraper conveying feeding, gravity feeding and the like. However, none of the above feeding methods can achieve accurate metering, resulting in the inability to accurately control the weight of each bag of product during bag packaging. Summary of the invention

[0003] The invention provides a material feeding metering device, which improves the feeding accuracy and speed.

[0004] The present invention provides the following technical solutions:

[0005] A material feeding metering device comprises at least one volume target hopper and a plurality of micro-supply hoppers, wherein:

[0006] A rotating silo for filling materials for the volume target hopper and the micro-replenishment hopper is arranged above the volume target hopper and the micro-replenishment hopper, a first control panel that can be opened and closed is arranged at the material outlet of the volume target hopper and the micro-replenishment hopper, a weighing and metering hopper is arranged below the material outlet of the volume target hopper and the micro-replenishment hopper, a first weighing sensor is arranged on the weighing and metering hopper, a second control panel that can be opened and closed is arranged at the material outlet of the weighing and metering hopper, and a bag clamping device for clamping a packaging bag is arranged below the material outlet of the weighing and metering hopper;

[0007] The total weight of materials contained in all volume target buckets is less than or equal to the rated weight of the packaging bag, and the total weight of materials contained in all volume target buckets and all micro-replenishment buckets is greater than the rated weight of the packaging bag;

[0008] The first weighing sensor is connected to the controller, the weighing and metering hopper receives the material dropped from the volume target hopper and performs the first weighing of the material in the weighing and metering hopper through the first weighing sensor, the controller calculates the first difference according to the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper weighed for the first time, the controller finds the first combination of micro-replenishing hoppers according to the first difference, the sum of the weights of the materials contained in the first combination of micro-replenishing hoppers is closest to the first difference, the first control panel of the first combination of micro-replenishing hoppers is opened, and the material is replenished into the weighing and metering hopper through the first combination of micro-replenishing hoppers.

[0009] Furthermore, after the material is replenished into the weighing and metering hopper through the first combination of the micro-replenishing hopper, the second control panel is opened to allow the material in the weighing and metering hopper to fall into the packaging bag;

[0010] Alternatively, after the material is replenished into the weighing and metering hopper through the first combination of the micro-replenishing hoppers, the material in the weighing and metering hopper is weighed for a second time through the first weighing sensor; the controller calculates a second difference based on the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper weighed for the second time. If the second difference is within the maximum allowable error range of the packaging bag, the second control panel is opened to allow the material in the weighing and metering hopper to fall into the packaging bag. Otherwise, the controller finds the second combination of micro-replenishing hoppers based on the second difference, the sum of the weights of the materials contained in the second combination of micro-replenishing hoppers is closest to the second difference, the first control panel of the second combination of micro-replenishing hoppers is opened, and the material is replenished into the weighing and metering hopper through the second combination of the micro-replenishing hoppers.

[0011] Furthermore, a receiving container is provided below the discharge port of the micro-replenishment hopper, a second weighing sensor is provided on the receiving container, and the receiving container is connected to a driving device for driving the receiving container to discharge materials.

[0012] Furthermore, a raw material bin is arranged above the rotary silo.

[0013] Furthermore, the volume target hopper, micro-replenishment hopper and raw material bin are installed on the main frame, one end of the first weighing sensor is set on the main frame, and the other end is connected to the weighing and metering hopper, and one end of the second weighing sensor is set on the main frame, and the other end is connected to the receiving container.

[0014] Furthermore, the weight of the materials contained in the several micro-replenishing buckets increases from small to large according to a set multiple, and the weight of the material contained in the smallest micro-replenishing bucket is half of the maximum allowable error range of the packaging bag; wherein the set multiple is greater than one and less than or equal to two.

[0015] Furthermore, the weight of the materials contained in the plurality of micro-replenishment buckets increases by two times from small to large.

[0016] Furthermore, the volume target bucket and the micro-replenishment bucket both include an inner tube and an outer tube located below the inner tube and sleeved on the outer circumference of the inner tube. The inner tube and the outer tube can be adjusted in the up and down directions, and a sealing rubber ring is provided between the inner tube and the outer tube.

[0017] Furthermore, an adjusting ring is provided on the outer tube, and the adjusting ring is sleeved on the adjusting column, and a locking bolt for locking the position of the adjusting ring is provided on the adjusting column.

[0018] Furthermore, a gear ring is installed on the outer edge of the rotating silo, and the gear ring is meshed with the gear on the output shaft of the motor.

[0019] Alternatively, a conical cylinder is arranged in the rotary silo, and the conical cylinder is connected to the motor via a connecting plate.

[0020] Furthermore, a plurality of vertical material pushing and blocking plates are arranged in the rotary silo, and the bottoms of the material pushing and blocking plates are in contact with the tops of the volume target hopper and the micro-replenishment hopper.

[0021] Furthermore, the rotary silo is provided with an auxiliary unloading device, and the auxiliary unloading device includes a vibration motor or an air hammer.

[0022] Furthermore, a second soft connection structure is provided between the material discharge port of the weighing and metering hopper and the bag clamping device; and the first control board and the second control board are driven by a cylinder.

[0023] The present invention has the following beneficial effects:

[0024] When the present invention performs bag packaging of materials, materials are fed through a volume target bucket, and the materials in a plurality of micro-supplement buckets are added and adjusted to the feeding of the volume target bucket, and finally a weight closest to the target value is formed, thereby improving the accuracy and speed of feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the material feeding and metering device of the present invention;

[0026] Figure 2 It is a side view of the material feeding and metering device of the present invention;

[0027] Figure 3 It is a top view of the material feeding metering device of the present invention at the volume target hopper and the micro-supply hopper;

[0028] Figure 4 A top view of the material feeding and metering device of the present invention at the rotary silo;

[0029] Figure 5 This is the front view of the volume target bucket / micro-replenishment bucket;

[0030] Figure 6 It is the right view of the volume target bucket / micro-replenishment bucket;

[0031] Figure 7 It is the main view of the receiving container;

[0032] Figure 8 It is a side view of the receiving container. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0034] The embodiment of the present invention provides a material feeding metering device, such as Figure 1-8 As shown, it includes at least one volume target bucket 8 and a plurality of micro-replenishment buckets 9, and the volume target bucket 8 and the micro-replenishment bucket 9 are installed on the main frame 1, wherein:

[0035] A rotating silo 3 for filling materials for the volume target hopper 8 and the micro-replenishing hopper 9 is arranged above the volume target hopper 8 and the micro-replenishing hopper 9. A first control panel 13 that can be opened and closed is arranged at the material outlet of the volume target hopper 8 and the micro-replenishing hopper 9. The first control panel 13 is driven to open and close by a cylinder 14, and the cylinder 14 is installed on the main frame 1 through a cylinder bracket 15.

[0036] A weighing and metering hopper 22 is arranged below the drop opening of the volume target hopper 8 and the micro-replenishment hopper 9. A first weighing sensor is arranged on the weighing and metering hopper 22. One end of the first weighing sensor is arranged on the main frame 1, and the other end is connected to the weighing and metering hopper 22 for measuring the weight of the material in the weighing and metering hopper 22.

[0037] A second control panel 29 that can be opened and closed is provided at the discharge port 23 of the weighing and metering hopper 22 . The second control panel 29 is driven to open and close by the cylinder 24 . A bag clamping device 26 for clamping the packaging bag is provided below the discharge port 23 of the weighing and metering hopper 22 .

[0038] The aforementioned volume target buckets may be one or more, for example, two, etc. The total weight of materials contained in all volume target buckets 8 is less than or equal to the rated weight of the packaging bag, and the total weight of materials contained in all volume target buckets 8 and all micro-replenishment buckets 9 is greater than the rated weight of the packaging bag.

[0039] When the present invention is in use, the material enters the rotary silo 3, and the rotary silo 3 rotates under the action of power. During the feeding process, the openings of the volume target bucket 8 and the trace replenishment bucket 9 are located in the rotary silo 3. The rotary silo 3 rotates a certain angle, for example 90 degrees, and the materials in the volume target bucket 8 and the trace replenishment bucket 9 are separated from the rotary silo, and the volume target bucket 8 and the trace replenishment bucket 9 are filled.

[0040] In order to facilitate the filling of materials into the volume target bucket 8 and the micro-replenishment bucket 9, a plurality of vertical material pusher and material baffle plates 33 are provided in the rotary silo 3, and the bottom of the material pusher and material baffle plates 33 is in contact with the top of the volume target bucket 8 and the micro-replenishment bucket 9. The material pusher and material baffle plates 33 rotate together with the rotary silo 3, and the materials are pushed by the material pusher and material baffle plates 33 in the rotary silo 3. When the rotary silo 3 rotates a certain angle, the materials are pushed to the top of the volume target bucket 8 and the micro-replenishment bucket 9 by the material pusher and material baffle plates 33, and the materials are filled into the volume target bucket 8 and the micro-replenishment bucket 9. After the rotary silo 3 rotates a certain angle again, the materials above the volume target bucket 8 and the micro-replenishment bucket 9 are pushed away from the volume target bucket 8 and the micro-replenishment bucket 9 by the material pusher and material baffle plates 33, so that the materials in the rotary silo 3 are separated from the volume target bucket 8 and the micro-replenishment bucket 9, and one filling is completed.

[0041] The number of the material pusher and baffle plates 33 may be one or more, such as Figure 4 As shown, there are two material pushing and blocking plates 33, which are arranged in parallel and spaced a certain distance from each other.

[0042] The first control panel 13 of the volume target bucket 8 is opened, so that the material in the volume target bucket 8 directly falls into the weighing and metering hopper 22 through the drop opening of the volume target bucket 8 , and the weighing and metering hopper 22 receives the material falling from the volume target bucket 8 .

[0043] The first weighing sensor is connected to the controller, and the material in the weighing and metering hopper 22 is weighed for the first time. The controller calculates the first difference according to the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper 22 weighed for the first time. The controller finds the first combination of the micro-replenishing hopper 9 according to the first difference, and the sum of the weights of the materials contained in the first combination of the micro-replenishing hopper 9 is closest to the first difference. The first control panel 13 of the first combination of the micro-replenishing hopper 9 is opened, and the material is replenished into the weighing and metering hopper 22 through the first combination of the micro-replenishing hopper 9. The difference between the material in the weighing and metering hopper 22 and the rated weight of the packaging bag is replenished by the number of the combination of each weight in the micro-replenishing hopper 9 that is closest to the difference, so that the final measurement number is closest to the set target value (i.e., the rated weight of the packaging bag).

[0044] Taking four micro-replenishment buckets as an example, assuming that the rated weight of the packaging bag is 10 kg, the volume target bucket contains 9.98 kg of material, and the weights of the materials in the micro-replenishment buckets are 0.01, 0.02, 0.04, and 0.08 kg, respectively. Then the difference of 0.02 kg is directly made up by the 0.02 kg material in the micro-replenishment bucket; if the volume target bucket contains 9.97 kg of material, then the material is made up by the combined weight of two micro-replenishment buckets weighing 0.01 kg and 0.02 kg; if the volume target bucket contains 9.95 kg of material, then the material is made up by the combined weight of two micro-replenishment buckets weighing 0.01 kg and 0.04 kg.

[0045] After the bag clamping device 26 receives the bagging signal, the bag clamping port is opened, and all the materials in the weighing and metering hopper 22 are sent to the packaging bag, and then enter the next packaging link, and so on.

[0046] When the present invention performs bag packaging of materials, materials are fed through a volume target bucket, and the materials in a plurality of micro-supplement buckets are added and adjusted to the feeding of the volume target bucket, and finally a weight closest to the target value is formed, thereby improving the accuracy and speed of feeding.

[0047] As described above, after the material is replenished into the weighing and metering hopper 22 through the first combination of the micro-replenishing hopper 9, the second control panel 29 can be opened to allow the material in the weighing and metering hopper 22 to fall into the packaging bag.

[0048] Alternatively, after the material is replenished into the weighing and metering hopper through the first combination of the micro-replenishing hopper, the second control panel 29 is not opened directly, but the material in the weighing and metering hopper 22 is weighed again, and the material is replenished again through the micro-replenishing hopper according to the weighing result, so that the metering accuracy can be improved, as follows:

[0049] The material in the weighing and metering hopper 22 is weighed for the second time through the first weighing sensor; the controller calculates the second difference based on the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper 22 weighed for the second time. If the second difference is within the maximum allowable error range of the packaging bag, the second control panel 29 is opened to allow the material in the weighing and metering hopper 22 to fall into the packaging bag. Otherwise, the controller finds the second combination of micro-replenishing hoppers 9 according to the second difference, and the sum of the weights of the materials contained in the second combination of micro-replenishing hoppers 9 is closest to the second difference. The first control panel 13 of the second combination of micro-replenishing hoppers 9 is opened to replenish the material into the weighing and metering hopper 22 through the second combination of micro-replenishing hoppers 9.

[0050] In order to further improve the accuracy, a receiving container 19 is arranged below the drop port of the micro-replenishing hopper 9, and a second weighing sensor 20 is arranged on the receiving container 19. The second weighing sensor 20 is installed on a sensor bracket 21. One end of the sensor bracket 21 is arranged on the main frame 1, and the other end is connected to the receiving container 19 for measuring the weight of the material in the receiving container 19.

[0051] The receiving container 19 is connected to a driving device 30 for driving the receiving container 19 to unload. The driving device 30 may be, for example, a cylinder, which drives a partition plate 31 at the bottom of the receiving container 19 to open and unload.

[0052] The material in the micro-replenishment hopper 9 first falls into the receiving container 19 and is weighed by the second weighing sensor 20 , and then the receiving container 19 is driven by the driving device to unload the material, so that the accurately measured material falls into the weighing and metering hopper 22 .

[0053] For the convenience of feeding, a raw material bin 2 is provided above the rotary silo 3, and the raw material bin 2 is installed on the main frame 1. The material is poured into the raw material bin 2, and the material enters the rotary silo 3 through the raw material bin 2.

[0054] In the present invention, the capacity of the volume target bucket 8 is determined according to the rated weight of the packaging bag, and the weight of the materials contained in the several micro-replenishment buckets 9 increases from small to large according to the set multiples, and the weight of the material contained in the smallest micro-replenishment bucket 9 is half of the maximum allowable error range of the packaging bag; wherein the set multiple is greater than one times and less than or equal to two times, for example, 1.8 times, 1.9 times, 2 times, etc.

[0055] Preferably, the multiple is set to be two times, and the weight of the materials contained in the plurality of micro-replenishment buckets increases by two times from small to large.

[0056] The volume target bucket 8 and the micro-replenishment bucket 9 of the present invention are adjustable in capacity. The volume target bucket 8 and the micro-replenishment bucket 9 both include an inner tube 10 and an outer tube 11 located below the inner tube 10 and sleeved on the outer periphery of the inner tube 10. The inner tube 10 and the outer tube 11 can be adjusted in the up and down directions to achieve adjustable capacity of the volume target bucket 8 and the micro-replenishment bucket 9. A sealing rubber ring 12 is provided between the inner tube 10 and the outer tube 11.

[0057] An adjusting ring 16 is provided on the outer tube 11 . The adjusting ring 16 is sleeved on an adjusting column 17 . The adjusting column 17 is mounted on the main frame 1 . A locking bolt 18 for locking the position of the adjusting ring 16 is provided on the adjusting column 17 .

[0058] In order to realize the rotation of the rotary silo, a gear ring 4 is installed on the outer edge of the rotary silo 3, a motor 5 is installed on the second-layer platform 7 of the main frame 1, and a gear 6 is installed on the output shaft of the motor 5, and the gear 6 is meshed with the gear ring 4.

[0059] Alternatively, a cone cylinder is provided in the rotary silo 3, and the cone cylinder is connected to the motor via a connecting plate.

[0060] The rotary silo 3 may be provided with an auxiliary unloading device 32, which includes a vibration motor or an air hammer, which assists the rotary silo 3 in unloading materials by vibration or knocking, thereby preventing poor unloading caused by material adhesion or compaction.

[0061] A soft connection structure 28 is provided between the drop port 23 of the gravity weighing metering hopper 22 and the bag clamping device 26 , on which a cylinder 25 is mounted, and the cylinder 25 is mounted on the soft connection structure 28 by a cylinder bracket 27 , and a bag clamping device 26 is installed at the lower port of the soft connection structure 28 .

[0062] The material passes through the soft connection structure 28, and under the action of the cylinder 25, all the material in the gravity weighing metering hopper 22 is sent to the packaging bag.

[0063] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A material feeding metering device, characterized in that: It includes at least one volume target hopper and a plurality of micro-replenishment hoppers, wherein: A rotating silo for filling materials for the volume target hopper and the micro-replenishment hopper is arranged above the volume target hopper and the micro-replenishment hopper, a first control panel that can be opened and closed is arranged at the material outlet of the volume target hopper and the micro-replenishment hopper, a weighing and metering hopper is arranged below the material outlet of the volume target hopper and the micro-replenishment hopper, a first weighing sensor is arranged on the weighing and metering hopper, a second control panel that can be opened and closed is arranged at the material outlet of the weighing and metering hopper, and a bag clamping device for clamping a packaging bag is arranged below the material outlet of the weighing and metering hopper; The total weight of materials contained in all volume target buckets is less than or equal to the rated weight of the packaging bag, and the total weight of materials contained in all volume target buckets and all micro-replenishment buckets is greater than the rated weight of the packaging bag; The first weighing sensor is connected to the controller, the weighing and metering hopper receives the material dropped from the volume target hopper and performs the first weighing of the material in the weighing and metering hopper through the first weighing sensor, the controller calculates the first difference according to the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper weighed for the first time, the controller finds the first combination of micro-replenishing hoppers according to the first difference, the sum of the weights of the materials contained in the first combination of micro-replenishing hoppers is closest to the first difference, the first control panel of the first combination of micro-replenishing hoppers is opened, and the material is replenished into the weighing and metering hopper through the first combination of micro-replenishing hoppers; After the material is replenished into the weighing and metering hopper through the first combination of the micro-replenishing hoppers, the material in the weighing and metering hopper is weighed for the second time through the first weighing sensor; the controller calculates the second difference according to the rated weight of the packaging bag and the weight of the material in the weighing and metering hopper weighed for the second time, and if the second difference is within the maximum allowable error range of the packaging bag, the second control panel is opened to allow the material in the weighing and metering hopper to fall into the packaging bag; otherwise, the controller finds the second combination of the micro-replenishing hoppers according to the second difference, the sum of the weights of the materials contained in the second combination of the micro-replenishing hoppers is closest to the second difference, the first control panel of the second combination of the micro-replenishing hoppers is opened, and the material is replenished into the weighing and metering hopper through the second combination of the micro-replenishing hoppers; The weight of the materials contained in the plurality of micro-replenishment buckets increases by two times from small to large, and the weight of the materials contained in the smallest micro-replenishment bucket is half of the maximum allowable error range of the packaging bag; The rotary silo is provided with a plurality of vertical pushing and blocking plates, the bottom of which is in contact with the top of the volume target bucket and the micro-replenishing bucket; the pushing and blocking plates rotate together with the rotary silo, and the material is pushed by the pushing and blocking plates in the rotary silo, and when the rotary silo rotates a certain angle, the material is pushed to the top of the volume target bucket and the micro-replenishing bucket by the pushing and blocking plates, and the material is filled into the volume target bucket and the micro-replenishing bucket, and after the rotary silo rotates a certain angle again, the material above the volume target bucket and the micro-replenishing bucket is pushed away from the volume target bucket and the micro-replenishing bucket by the pushing and blocking plates, so that the material in the rotary silo is separated from the volume target bucket and the micro-replenishing bucket, and one filling is completed.

2. The material feeding metering device according to claim 1, characterized in that: A receiving container is arranged below the discharge port of the micro-replenishment hopper, a second weighing sensor is arranged on the receiving container, and a driving device for driving the receiving container to discharge is connected to the receiving container.

3. The material feeding metering device according to claim 2, characterized in that: A raw material bin is arranged above the rotary bin.

4. The material feeding metering device according to claim 3, characterized in that: The volume target hopper, micro-replenishment hopper and raw material bin are installed on the main frame, one end of the first weighing sensor is set on the main frame, and the other end is connected to the weighing and metering hopper, and one end of the second weighing sensor is set on the main frame, and the other end is connected to the receiving container.

5. The material feeding metering device according to claim 1, characterized in that: The volume target bucket and the micro-replenishment bucket both include an inner tube and an outer tube located below the inner tube and sleeved on the outer periphery of the inner tube. The inner tube and the outer tube can be adjusted in the up and down directions, and a sealing rubber ring is provided between the inner tube and the outer tube.

6. The material feeding metering device according to claim 5, characterized in that: The outer tube is provided with an adjusting ring, the adjusting ring is sleeved on the adjusting column, and the adjusting column is provided with a locking bolt for locking the position of the adjusting ring.

7. The material feeding metering device according to claim 1, characterized in that: The outer edge of the rotating silo is provided with a gear ring, which is meshed with the gear on the output shaft of the motor. Alternatively, a conical cylinder is arranged in the rotary silo, and the conical cylinder is connected to the motor via a connecting plate.

8. The material feeding metering device according to claim 1, characterized in that: The rotary silo is provided with an auxiliary unloading device, which includes a vibration motor or an air hammer.

9. The material feeding metering device according to claim 1, characterized in that: A second soft connection structure is provided between the material discharge port of the weighing and metering hopper and the bag clamping device; the first control board and the second control board are driven by a cylinder.

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