Automatic metering packaging machine for rice processing

Abstract

The invention discloses an automatic metering and packaging machine for rice processing, which comprises a dust collection pipe system communicated with a self-dust-collection type blanking mechanism, a transverse two-station weighing base is arranged below the self-dust-collection type blanking mechanism, a vertical adjusting mechanism is arranged on the transverse two-station weighing base, and the vertical adjusting mechanism is connected with the dust collection pipe system. An air suction type bag opening mechanism is installed on the vertical adjusting mechanism, a bag opening heat sealing mechanism is installed on the air suction type bag opening mechanism, the vacuum suction pipe system is connected to the self-dust-suction type discharging mechanism, and the lower end of the vacuum suction pipe system stretches into the upper portion of a packaging bag through the air suction type bag opening mechanism. According to the rice packaging machine, bagging, weighing and heat sealing operation of a plurality of packaging bags can be synchronously carried out, the operation efficiency is improved, the weighing accuracy is ensured, meanwhile, impurities doped in rice are effectively removed, and the situation that the quality of the rice is affected by the impurities is avoided. The device is suitable for the technical field of rice weighing and packaging.

Description

Technical Field

[0001] The invention belongs to the technical field of rice weighing and packaging, and in particular relates to an automatic metering and packaging machine for rice processing. Background Art

[0002] At present, in rice processing, it is necessary to remove the rice husk from the rice and then polish the surface of the rice to achieve the purpose of removing impurities and insect eggs attached to the surface of the rice and improving the appearance of the rice. Afterwards, the rice is transported to the discharging device, a packaging bag is placed at the outlet end of the discharging device, and the discharging device is controlled to supply the rice into the packaging bag; the packaging bag is transferred to the bag sealing device for sealing; then, the above operation is repeated to achieve the purpose of bagging one by one. However, before the bagging operation, the rice will also be mixed with impurities such as dust and broken rice husks mixed due to the polishing operation. If they are not removed in time, the quality of the rice after bagging will be affected. Moreover, in the entire process of bagging and weighing, the existing bagging equipment, weighing equipment, and heat sealing equipment can only bag, weigh and heat seal one bag, which is inefficient, and the weight measurement of the rice is inaccurate, and weighing errors often occur, which leads to a certain deviation between the actual bagging weight of the rice and the predetermined bagging quality. In summary, there is an urgent need for an automatic rice metering and packaging equipment that can simultaneously perform bagging, weighing and heat-sealing operations on multiple packaging bags, improve operation efficiency, ensure the accuracy of weighing, and effectively remove impurities mixed in the rice to prevent impurities from affecting the quality of the rice. Summary of the invention

[0003] The invention provides an automatic metering and packaging machine for rice processing, which is used for simultaneously performing bagging, weighing and heat-sealing operations of multiple packaging bags, thereby improving the efficiency of the operation and ensuring the accuracy of weighing, and at the same time effectively removing impurities mixed in the rice to prevent the impurities from affecting the quality of the rice.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: An automatic metering and packaging machine for rice processing comprises a vacuum pipe system connected to a self-dust suction feeding mechanism, a horizontal two-station weighing base is arranged below the self-dust suction feeding mechanism, a vertical adjustment mechanism is arranged on the horizontal two-station weighing base, an air suction bag-holding mechanism is installed on the vertical adjustment mechanism, a bag opening heat-sealing mechanism is installed on the air suction bag-holding mechanism, a vacuum pipe system is connected to the self-dust suction feeding mechanism, and the lower end of the vacuum pipe system extends into the upper part of the packaging bag through the air suction bag-holding mechanism.

[0005] Furthermore, the self-dust suction type unloading mechanism includes a plurality of material tooth type unloading units connected in parallel by transmission, two transmission wheels are installed on the material tooth type unloading unit located at one end, a residual material bypass pipe is provided at the unloading port of each material tooth type unloading unit, a residual material control valve is installed on the residual material bypass pipe, a residual material conveyor belt is provided obliquely below the self-dust suction type unloading mechanism, and the lower end of each residual material bypass pipe extends to the top of the residual material conveyor belt.

[0006] Furthermore, the tooth-type material unloading unit includes two tooth-type paddle wheels relatively installed in the assembly cavity of the assembly shell, and a feed joint and a discharge joint are respectively constructed at the upper and lower ends of the assembly shell, a discharge control valve is installed on the discharge joint, and the upper end of the discharge joint is connected to the assembly shell through a transition pipe, the upper end of the residual material bypass pipe is connected to the transition pipe, and a discharge nozzle is detachably connected to the lower end of the discharge joint, the axial ends of each of the tooth-type paddle wheels are respectively rotatably connected to the assembly shell, the axial ends of the corresponding two tooth-type paddle wheels in two adjacent tooth-type unloading units are detachably connected, and the two transmission wheels are coaxially installed on the corresponding two tooth-type paddle wheels.

[0007] Furthermore, the geared paddle wheel has a dust suction chamber, one axial end of the geared paddle wheel is in an open state and connected to the dust suction chamber, the peripheral wall of the geared paddle wheel is covered with dust suction holes, an axial sealing cover is detachably connected to the open port of the geared paddle wheel, a connecting shaft is connected to the other axial end of the geared paddle wheel, and a conducting shaft tube is connected to the axial sealing cover, the axes of the connecting shaft, the conducting shaft tube and the geared paddle wheel coincide, and the connecting shaft and the conducting shaft tube are rotatably connected to two opposite fixed end covers of the assembly shell respectively, and the dust suction pipe is connected to the dust suction chamber via the conducting shaft tube.

[0008] Furthermore, the dust suction pipe system includes an adapter sleeve rotatably mounted on the outside of each conducting shaft tube, and a plurality of conducting holes are opened on the conducting shaft tube and at a position located inside the adapter sleeve. The adapter sleeve includes a first half sleeve body and a second half sleeve body, and the first half sleeve body and the second half sleeve body are assembled with each other to form a complete sleeve body. The first half sleeve body is connected to the dust suction branch pipe through a joint pipe, and each dust suction branch pipe is connected to the dust suction main pipe.

[0009] Furthermore, the horizontal two-station weighing base includes two horizontal driving members respectively arranged on both sides of the base body, and the two ends of each of the horizontal driving members are respectively connected to the base body and the frame, and multiple weighing plates are installed on the base body. These weighing plates are arranged one by one corresponding to multiple tooth-type feeding units, and a weighing sensor is installed in each weighing plate.

[0010] Furthermore, the vertical adjustment mechanism includes two vertical slide rails respectively arranged on both sides of the base body, a vertical slider is slidably connected to each of the vertical slide rails, a vertical driving member is installed between the vertical slider and the base body, and the two vertical sliders are transmission-connected to the air suction bag-supporting mechanism.

[0011] Furthermore, the air suction bag-holding mechanism includes a plurality of bag-holding units arranged one-to-one corresponding to the plurality of tooth-type feeding units, and the bag mouth heat-sealing mechanism includes a plurality of heat-sealing units, each of which is detachably connected to the lower end of the corresponding bag-holding unit.

[0012] Furthermore, the bag-holding unit includes two strip-shaped air suction plates arranged opposite to each other, the two strip-shaped air suction plates are respectively connected to the first longitudinal rod and the second longitudinal rod, and the first longitudinal driving member and the second longitudinal driving member are respectively installed on the two vertical sliders, and the first longitudinal driving member and the second longitudinal driving member are respectively connected to the first longitudinal rod and the second longitudinal rod.

[0013] Furthermore, the heat sealing unit includes two elastic magnetic heat sealing components respectively installed on the two strip-shaped air suction plates, each of the elastic magnetic heat sealing components includes two connecting plates respectively installed at the two ends of the strip-shaped air suction plates, a movable rod is movably connected to each connecting plate, a magnetic suction cup is constructed at one end of the movable rod, an electromagnet is installed on the connecting plate, a copper spring is sheathed on the outer side of the movable rod, the two ends of the copper spring are respectively connected to the magnetic suction cup and the connecting plate, a heat sealing rod is connected to the other end of the movable rod, the heat sealing rod extends along the length direction of the strip-shaped air suction plate, and the movable rod extends along the width direction of the strip-shaped air suction plate.

[0014] Due to the adoption of the above structure, the technical progress achieved by the present invention compared with the prior art is that: the present invention uses an air suction bag-supporting mechanism to open a plurality of packaging bags side by side under the self-dust suction feeding mechanism, and controls the self-dust suction feeding mechanism to supply rice to these packaging bags. During this process, the horizontal two-station weighing base weighs these packaging bags in real time and synchronously. At the same time, the self-dust suction feeding mechanism discharges the material while vacuuming the rice passing through the self-dust suction feeding mechanism through the vacuum pipe system, thereby achieving the purpose of removing impurities. When one Or when the weight of rice in multiple packaging bags reaches a predetermined value, the discharge port at that position of the self-dust suction feeding mechanism is controlled to stop feeding, while the discharge ports at other positions continue to feed until the weight of all packaging bags reaches the predetermined value; then the air suction bag-supporting mechanism is controlled to close the bag openings of these packaging bags, at which time the lower end of the vacuum suction pipe system is located in the bag opening of the packaging bag; thereafter, the vacuum suction pipe system is controlled to move downward, and the packaging bag is vacuumed through the vacuum suction pipe system, so that the rice is in a vacuum environment, thereby preventing the rice from being exposed to the air for a long time and deteriorating. After the vacuum suction is completed, the bag mouth heat sealing mechanism is controlled to heat seal the upper part of each packaging bag synchronously; then, the vacuum suction pipe system is controlled to move upward to separate it from the packaging bag; next, the horizontal two-station weighing base is controlled to move horizontally out from the bottom of the self-dust suction feeding mechanism, at this time, the vertical adjustment mechanism, the air suction bag support mechanism and the packaging bag are moved out together; then the air suction bag support mechanism is controlled to release the packaging bag, remove these packed packaging bags, set a new plurality of empty packaging bags on the air suction bag support mechanism, and the air suction bag support mechanism opens these new packaging bags, and then the horizontal two-station weighing base is controlled to drive these new packaging bags to move to the bottom of the self-dust suction feeding mechanism, so as to facilitate the next bagging and metering operation. This embodiment can control the vertical adjustment mechanism according to the size of the packaging bag, so that it drives the packaging bag to move vertically through the air suction bag support mechanism, thereby ensuring that the lower end of the packaging bag is fully in contact with the horizontal two-station weighing base to avoid metering errors. In summary, the present invention can simultaneously carry out bagging, weighing and heat-sealing operations of multiple packaging bags, thereby improving the efficiency of the operation and ensuring the accuracy of weighing, while effectively removing impurities mixed in the rice and preventing the impurities from affecting the quality of the rice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] In the attached picture: Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2It is a structural schematic diagram of the connection between the self-dust suction type unloading mechanism, the dust suction pipe system and the residual material conveyor belt of the present invention; Figure 3 for Figure 2 a side view of the structure shown; Figure 4 It is a structural schematic diagram of the connection between a single feeding tooth type feeding unit and a local dust suction pipe system in the self-dust suction feeding mechanism according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the disassembled assembly shell in the material tooth type unloading unit according to the embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of two toothed material-push wheels and a partial dust suction pipe system after being disassembled in an embodiment of the present invention; Figure 7 It is a schematic structural diagram of the connection between the horizontal two-station weighing base, the vertical adjustment mechanism, the air suction bag-supporting mechanism and the vacuum suction pipe system according to an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a vacuum pipe system according to an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of the connection between the horizontal two-station weighing base, the vertical adjustment mechanism and the air suction bag-supporting mechanism according to an embodiment of the present invention; Fig.10 This is a schematic structural diagram of the connection between the bag-supporting unit and the heat-sealing unit according to an embodiment of the present invention; Fig.11 This is a front view of the structure in which the bag-supporting unit and the heat-sealing unit are connected in an embodiment of the present invention; Fig.12 It is a schematic diagram of the result of two strip-shaped air suction plates in the bag-holding unit of an embodiment of the present invention being separated from each other.

[0017] Labeled parts: 100-self-dust suction unloading mechanism, 101-assembly shell, 102-assembly chamber, 103-fixed end cover, 104-feed connector, 105-transition pipe, 106-discharge connector, 107-discharge control valve, 108-discharge nozzle, 109-residual material bypass pipe, 110-residual material control valve, 111-toothed paddle wheel, 112-dust suction chamber, 113-first connecting flange, 114- Guide shaft tube, 115-guide hole, 116-axial sealing cover, 117-second connecting flange, 200-driving wheel, 300-dust suction pipe system, 301-dust suction main pipe, 302-dust suction branch pipe, 303-joint pipe, 304-first half sleeve, 305-second half sleeve, 400-residue conveyor belt, 500-vacuum suction pipe system, 501-vacuum suction main pipe, 502-vacuum suction joint, 503- Vacuum suction branch pipe, 504-vertical electric cylinder, 600-air suction bag support mechanism, 601-strip air suction plate, 602-air suction branch pipe, 603-air suction hole, 604-insertion hole, 605-fixing sleeve, 606-locking bolt, 607-air suction main pipe, 608-air suction joint, 700-bag mouth heat sealing mechanism, 701-connecting plate, 702-movable rod, 703-magnetic suction disc, 704-electromagnet, 705-copper spring, 706-heat sealing rod, 800-vertical adjustment mechanism, 801-vertical slide rail, 802-vertical slider, 803-vertical driving member, 804-first longitudinal driving member, 805-first longitudinal rod, 806-second longitudinal driving member, 807-second longitudinal rod, 900-horizontal two-station weighing base, 901-base body, 902-weighing plate, 903-horizontal driving member. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] The present invention discloses an automatic metering and packaging machine for rice processing, such as Figure 1-12As shown, it includes a self-dust suction type unloading mechanism 100, a dust suction pipe system 300, a horizontal two-station weighing base 900, a vertical adjustment mechanism 800, an air suction bag-supporting mechanism 600, a bag-mouth heat-sealing mechanism 700 and a vacuum suction pipe system 500. Among them, the dust suction pipe system 300 is connected with the self-dust suction type unloading mechanism 100, the horizontal two-station weighing base 900 is arranged below the self-dust suction type unloading mechanism 100, the vertical adjustment mechanism 800 is installed on the horizontal two-station weighing base 900, the air suction bag-supporting mechanism 600 is installed on the vertical adjustment mechanism 800, and the bag-mouth heat-sealing mechanism 700 is installed on the air suction bag-supporting mechanism 600. The vacuum suction pipe system 500 of the present invention is connected to the self-dust suction type unloading mechanism 100, and the lower end of the vacuum suction pipe system 500 extends into the upper part of the packaging bag through the air suction bag-supporting mechanism 600. The working principle and advantages of the present invention are as follows: the present invention uses an air suction bag-supporting mechanism 600 to support multiple packaging bags side by side under the self-dust-absorbent feeding mechanism 100, and controls the self-dust-absorbent feeding mechanism 100 to supply rice to these packaging bags. During this process, the horizontal two-station weighing base 900 weighs these packaging bags in real time and synchronously. At the same time, the self-dust-absorbent feeding mechanism 100 discharges the material while vacuuming the rice passing through the self-dust-absorbent feeding mechanism 100 through the vacuum pipe system 300, thereby achieving the purpose of removing impurities; when one or more packaging bags When the weight of the rice inside reaches a predetermined value, the discharge port at the position of the self-vacuum discharge mechanism 100 is controlled to stop feeding, while the discharge ports at other positions continue to feed until the weight of all the packaging bags reaches a predetermined value; then the air suction bag-supporting mechanism 600 is controlled to close the bag openings of these packaging bags. At this time, the lower end of the vacuum suction pipe system 500 is located in the bag opening of the packaging bag; thereafter, the vacuum suction pipe system 500 is controlled to move downward, and the packaging bag is vacuumed by the vacuum suction pipe system 500, so that the rice is in a vacuum environment, thereby preventing the rice from being exposed to the air for a long time and deteriorating. After the vacuum suction is completed, the bag mouth heat sealing mechanism 700 is controlled to heat seal the upper part of each packaging bag synchronously; then, the vacuum suction pipe system 500 is controlled to move upward to separate it from the packaging bag; next, the horizontal two-station weighing base 900 is controlled to move horizontally out from the bottom of the self-vacuum type unloading mechanism 100, at this time, the vertical adjustment mechanism 800, the air suction type bag-holding mechanism 600 and the packaging bag are moved out together; then the air suction type bag-holding mechanism 600 is controlled to release the packaging bag, remove the packaged packaging bags, set a new plurality of empty packaging bags on the air suction type bag-holding mechanism 600, and the air suction type bag-holding mechanism 600 opens these new packaging bags, and then, the horizontal two-station weighing base 900 is controlled to drive these new packaging bags to move to the bottom of the self-vacuum type unloading mechanism 100 to facilitate the next bagging and metering operation.This embodiment can control the vertical adjustment mechanism 800 to move according to the size of the packaging bag, so that the air suction bag support mechanism 600 drives the packaging bag to move vertically, thereby ensuring that the lower end of the packaging bag is fully in contact with the horizontal two-station weighing base 900 to avoid measurement errors. In summary, the present invention can simultaneously perform bagging, weighing and heat sealing operations of multiple packaging bags, improve the efficiency of the operation, and ensure the accuracy of weighing, while effectively removing impurities mixed in the rice to avoid the impurities affecting the quality of the rice.

[0020] As a preferred embodiment of the present invention, Figure 2-4 As shown, the self-dust suction type feeding mechanism 100 includes a plurality of tooth-type feeding units, which are arranged side by side and connected together by transmission; two transmission wheels 200 are installed on the tooth-type feeding unit located at one end of the tooth-type feeding units, and by driving the two transmission wheels 200 to rotate relative to each other, the tooth-type feeding units synchronously convey rice downward in a quantitative manner. In this embodiment, a residual material bypass pipe 109 is provided at the feeding port of each tooth-type feeding unit, and a residual material control valve 110 is installed on the residual material bypass pipe 109. A residual material conveyor belt 400 is provided obliquely below the self-dust suction type feeding mechanism 100, and the lower end of each residual material bypass pipe 109 extends to the upper part of the residual material conveyor belt 400. The working principle and advantages of this embodiment are as follows: the multiple packaging bags of this embodiment are opened by the air suction bag support mechanism 600 and are located below these tooth-type feeding units, and the packaging bags and the tooth-type feeding units are arranged one by one; when these tooth-type feeding units are synchronously operated, the rice is synchronously injected into each packaging bag. Since there will be a certain deviation in the filling of these packaging bags, when the weight of the rice in some packaging bags reaches a predetermined value, the discharge port of the corresponding tooth-type feeding unit is closed, and the corresponding residual material control valve 110 is opened. In the process of continuing to drive the two transmission wheels 200 to rotate relative to each other, the rice in the tooth-type feeding unit with the discharge port closed will not fill the tooth-type feeding unit, causing the tooth-type feeding unit to get stuck, that is, although the discharge port of the tooth-type feeding unit is closed, the tooth-type feeding unit still continues to convey the rice downward, and then conveys it to the residual material conveyor belt 400 by the residual material bypass pipe 109, and then conveys it to the rice collection bucket by the residual material conveyor belt 400. During this process, the remaining feeding tooth type feeding units whose feeding ports are not closed continue to convey rice to the corresponding packaging bags until the weight of the rice in the packaging bags reaches a predetermined value.

[0021] As a preferred embodiment of the present invention, Figure 4-6As shown, the tooth-type material unloading unit includes an assembly shell 101 and two tooth-type material discharging wheels 111, and the two tooth-type material discharging wheels 111 are relatively installed in the assembly cavity 102 of the assembly shell 101, a feed connector 104 is constructed at the upper end of the assembly shell 101, and a discharge connector 106 is constructed at the lower end of the assembly shell 101, and a discharge control valve 107 is installed on the discharge connector 106. A transition pipe 105 is constructed at the upper end of the discharge joint 106, and the diameter of the transition pipe 105 gradually expands upward in the vertical direction. The upper end (large diameter end) of the transition pipe 105 is connected to the lower end of the assembly shell 101, and the discharge joint 106 is connected to the assembly chamber 102 through the transition pipe 105. The upper end of the above-mentioned residual material bypass pipe 109 is connected to the transition pipe 105. A discharge nozzle 108 is detachably connected to the lower end of the discharge joint 106, and the discharge nozzle 108 is aligned with the upper port of the corresponding packaging bag to facilitate continuous feeding of the packaging bag. In this embodiment, the axial ends of each toothed material-digging wheel 111 are respectively rotatably connected to the assembly shell 101, and the axial ends of the corresponding two toothed material-digging wheels 111 in two adjacent toothed unloading units are detachably connected, and the two transmission wheels 200 are coaxially installed on the corresponding two toothed material-digging wheels 111. The two transmission wheels 200 are synchronously driven to rotate relative to each other, thereby driving the two toothed material-discharging wheels 111 in each toothed material-discharging unit to rotate relative to each other, thereby continuously and quantitatively conveying the rice entering the assembly cavity 102 to the packaging bag.

[0022] As a preferred embodiment of the present invention, Figure 6As shown, the geared paddle wheel 111 has a dust suction chamber 112, one axial end of the geared paddle wheel 111 is in an open state, and the end is connected to the dust suction chamber 112, and the peripheral wall of the geared paddle wheel 111 is covered with dust suction holes, and these dust suction holes connect the dust suction chamber 112 and the assembly chamber 102. In this embodiment, an axial sealing cover 116 is detachably connected at the open end of the geared paddle wheel 111, and a connecting shaft is connected to the other axial end of the geared paddle wheel 111. A conducting shaft tube 114 is connected to the axial sealing cover 116, and the axes of the connecting shaft, the conducting shaft tube 114 and the geared paddle wheel 111 coincide, and the connecting shaft and the conducting shaft tube 114 are rotatably connected to the two opposite fixed end covers 103 of the assembly shell 101, respectively, and the dust suction pipe system 300 is connected to the dust suction chamber 112 through the conducting shaft tube 114. In this embodiment, the first connecting flange 113 and the second connecting flange 117 are fixed to the ends of the connecting shaft and the conducting shaft tube 114 that are away from each other, respectively, and the corresponding first connecting flange 113 and second connecting flange 117 in the adjacent material tooth type unloading units can be detachably connected together. The dust suction pipe system 300 of this embodiment includes an adapter sleeve, a dust suction main pipe 301, a plurality of dust suction branch pipes 302 and a plurality of joint pipes 303, wherein the adapter sleeve is rotatably mounted on the outside of the corresponding conducting shaft tube 114, and a plurality of conducting holes 115 are provided on the conducting shaft tube 114 and at a position inside the adapter sleeve. The adapter sleeve of this embodiment includes a first half sleeve body 304 and a second half sleeve body 305, and the first half sleeve body 304 and the second half sleeve body 305 are assembled to form a complete sleeve body; in this way, the adapter sleeve achieves the purpose of convenient disassembly and maintenance. Multiple dust suction branch pipes 302 are arranged in one-to-one correspondence with multiple tooth-type feeding units, and each first half sleeve 304 is connected to the corresponding dust suction branch pipe 302 through the joint pipe 303, and each dust suction branch pipe 302 is connected to the dust suction main pipe 301. In this embodiment, by sucking the dust suction main pipe 301, the impurities mixed with rice in the assembly chamber 102 enter the dust suction chamber 112 through the dust suction hole under the suction force, and then pass through the guide shaft tube 114, the guide hole 115, the adapter sleeve, the joint pipe 303, the dust suction branch pipe 302 and the dust suction main pipe 301 in sequence, and are finally sucked out. In addition, in the process of sucking the impurities, the suction force is not easy to be too large, so as to avoid the excessive suction force affecting the transportation of rice by the tooth-type feeding unit.

[0023] As a preferred embodiment of the present invention, Fig. 9As shown, the horizontal two-station weighing base 900 includes a base body 901, two horizontal driving members 903 and a plurality of weighing plates 902. Among them, the two horizontal driving members 903 are respectively arranged on both sides of the base body 901, and the two ends of each horizontal driving member 903 are respectively connected to the base body 901 and the frame, and the two horizontal driving members 903 act synchronously to drive the base body 901 to the bottom of the self-dust suction type unloading mechanism 100, or move out from the bottom of the self-dust suction type unloading mechanism 100. The multiple weighing plates 902 described in this embodiment are all installed on the base body 901, and these weighing plates 902 are arranged one by one with multiple material tooth type unloading units, and a weighing sensor is installed in each weighing plate 902. In the process of injecting rice into the packaging bag, the lower end of the packaging bag is always in contact with the corresponding weighing plate 902, and the weighing plate 902 bears the weight of the packaging bag and the rice therein, thereby ensuring the accuracy of weighing.

[0024] As a preferred embodiment of the present invention, Fig. 9 As shown, the vertical adjustment mechanism 800 includes two vertical slide rails 801, which are respectively arranged on both sides of the base body 901, and a vertical slider 802 is slidably connected to each vertical slide rail 801, and a vertical driving member 803 is installed between the vertical slider 802 and the base body 901, and the two vertical sliders 802 are transmission-connected to the air suction bag-supporting mechanism 600. In this embodiment, the two vertical driving members 803 are controlled to synchronously drive the two vertical sliders 802 to move vertically, thereby making the air suction bag-supporting mechanism 600 connected to the two vertical sliders 802 move vertically, thereby ensuring that packaging bags of different models can fully contact the corresponding weighing pan 902.

[0025] As a preferred embodiment of the present invention, Figure 9-12As shown, the air suction bag-holding mechanism 600 includes a plurality of bag-holding units, and these bag-holding units are arranged one by one with a plurality of material-tooth-type feeding units. The bag-mouth heat-sealing mechanism 700 includes a plurality of heat-sealing units, and each heat-sealing unit is detachably connected to the lower end of the corresponding bag-holding unit. Each bag-holding unit of this embodiment holds open the upper end of the corresponding packaging bag, and each heat-sealing unit heat-seals the upper part of the corresponding packaging bag. Among them, the bag-holding unit includes two strip-shaped air suction plates 601 arranged opposite to each other, each strip-shaped air suction plate 601 has an air suction cavity, and a plurality of air suction holes 603 are respectively opened at one end of the two strip-shaped air suction plates 601 close to each other, and each air suction hole 603 is connected to the corresponding air suction cavity. An air suction branch pipe 602 is connected to one end of the strip-shaped air suction plate 601, and each air suction branch pipe 602 is connected to an air suction main pipe 607, and an air suction joint 608 is constructed on the air suction main pipe 607. In this embodiment, a fixing sleeve 605 is installed at the upper end of each strip-shaped air suction plate 601, a first longitudinal rod 805 is assembled with the fixing sleeve 605 on one of the strip-shaped air suction plates 601, and a second longitudinal rod 807 is assembled with the fixing sleeve 605 on another strip-shaped air suction plate 601. A locking bolt 606 is threadedly connected to the fixing sleeve 605, and each locking bolt 606 is locked on the corresponding first longitudinal rod 805 or second longitudinal rod 807. A first longitudinal driving member 804 and a second longitudinal driving member 806 are respectively installed on the two vertical sliders 802, and the first longitudinal driving member 804 and the second longitudinal driving member 806 are respectively connected to the first longitudinal rod 805 and the second longitudinal rod 807. The working principle and advantages of this embodiment are as follows: this embodiment controls the first longitudinal driving member 804 and the second longitudinal driving member 806 to move synchronously, so that the two strip air suction plates 601 of each bag-supporting unit are moved closer to or farther away from each other; when the upper end of the packaging bag is located between the two strip air suction plates 601 and is sucked by the two strip air suction plates 601 on both sides of the upper end of the packaging bag, the first longitudinal driving member 804 and the second longitudinal driving member 806 are controlled to move so that the two strip air suction plates 601 are moved away from each other, thereby achieving the purpose of opening the bag mouth of the packaging bag. When vacuuming and subsequent heat sealing operations are required, the first longitudinal driving member 804 and the second longitudinal driving member 806 are controlled to move in the opposite direction, so that the two strip air suction plates 601 are moved closer to each other, thereby closing the upper end of the packaging bag. When the air suction main pipe 607 stops sucking air, the two strip air suction plates 601 stop sucking the packaging bag, thereby achieving the purpose of separating the packaging bag from the bag-supporting unit. In this embodiment, at least one insertion hole 604 is formed between two strip-shaped air suction plates 601 , and each insertion hole 604 is composed of two half holes, which are respectively formed on the end surfaces of the two strip-shaped air suction plates 601 that are close to each other.

[0026] As a preferred embodiment of the present invention, Figure 7 , 8As shown, the vacuum suction pipe system 500 includes a vacuum suction main pipe 501, a vacuum suction joint 502 is constructed on the vacuum suction main pipe 501, and a plurality of vacuum suction branch pipes 503 are also constructed on the vacuum suction main pipe 501. At least one vertical electric cylinder 504 is installed on the vacuum suction main pipe 501, and the vertical electric cylinder 504 is connected to the corresponding material tooth type unloading unit. In this embodiment, the vertical electric cylinder 504 is controlled to move vertically to drive the vacuum suction main pipe 501 and the vacuum suction branch pipes 503 thereon, thereby achieving the purpose of extending the vacuum suction branch pipes 503 into the upper port of the corresponding packaging bag. When the two strip-shaped air suction plates 601 of the bag-supporting unit approach each other and close the upper port of the packaging bag, the vacuum suction branch pipes 503 are located in the upper port of the packaging bag and clamped at the corresponding insertion hole 604. After that, the vacuum joint 502 is evacuated, and the air in the packaging bag is smoothly evacuated under the negative pressure; then, the upper part of the packaging bag and the part below the vacuum branch pipe 503 are heat-sealed by the heat sealing unit. After completion, the vertical electric cylinder 504 is controlled to drive the vacuum branch pipe 503 to move upward through the vacuum main pipe 501 and separate from the packaging bag.

[0027] As a preferred embodiment of the present invention, Figure 10-12 As shown, the heat sealing unit includes two elastic magnetic heat sealing components, which are respectively mounted on two strip air suction plates 601. Each elastic magnetic heat sealing component includes two connecting plates 701, which are respectively mounted at both ends of the strip air suction plate 601, and a movable rod 702 is movably connected to each connecting plate 701, and a magnetic suction cup 703 is constructed at one end of each movable rod 702. An electromagnet 704 is installed on the connecting plate 701, and a copper spring 705 is sheathed on the movable rod 702. The two ends of the copper spring 705 are respectively connected to the magnetic suction cup 703 and the connecting plate 701. In this embodiment, a heat sealing rod 706 is connected to the other end of the movable rod 702, and the heat sealing rod 706 extends along the length direction of the strip air suction plate 601, and the movable rod 702 extends along the width direction of the strip air suction plate 601. The working principle and advantages of this embodiment are as follows: when performing heat sealing, the electromagnet 704 is powered on, so that the electromagnet 704 attracts the corresponding magnetic suction cup 703, so that the movable rod 702 moves toward the packaging bag, so that it drives the heat sealing rod 706 to move toward the packaging bag, until the two heat sealing rods 706 on the two elastic magnetic heat sealing components are synchronously pressed at the upper position of the packaging bag, so as to achieve the purpose of heat sealing. When the heat sealing is completed, the electromagnet 704 is powered off, and under the action of the copper spring 705, the two heat sealing rods 706 move away from each other, so that both are away from the packaging bag.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An automatic metering and packaging machine for rice processing, characterized in that: It includes a dust suction pipe system connected to a self-dust suction feeding mechanism, a horizontal two-station weighing base is arranged below the self-dust suction feeding mechanism, a vertical adjustment mechanism is arranged on the horizontal two-station weighing base, an air suction bag-holding mechanism is installed on the vertical adjustment mechanism, a bag opening heat-sealing mechanism is installed on the air suction bag-holding mechanism, a vacuum suction pipe system is connected to the self-dust suction feeding mechanism, and the lower end of the vacuum suction pipe system extends into the upper part of the packaging bag through the air suction bag-holding mechanism.

2. The automatic metering and packaging machine for rice processing according to claim 1, characterized in that: The self-dust suction type unloading mechanism comprises a plurality of material tooth type unloading units which are connected in parallel transmission, two transmission wheels are installed on the material tooth type unloading unit at one end, a residual material bypass pipe is arranged at the unloading port of each material tooth type unloading unit, a residual material bypass pipe is installed on the residual material control valve, a residual material conveyor belt is arranged obliquely below the self-dust suction type unloading mechanism, and the lower end of each residual material bypass pipe extends to the top of the residual material conveyor belt.

3. The automatic metering and packaging machine for rice processing according to claim 2, characterized in that: The tooth-type material unloading unit includes two tooth-type paddle wheels relatively installed in the assembly cavity of the assembly shell, a feed joint and a discharge joint are respectively constructed at the upper and lower ends of the assembly shell, a discharge control valve is installed on the discharge joint, and the upper end of the discharge joint is connected to the assembly shell through a transition pipe, the upper end of the residual material bypass pipe is communicated with the transition pipe, and a discharge nozzle is detachably connected to the lower end of the discharge joint, the axial ends of each of the tooth-type paddle wheels are respectively rotatably connected to the assembly shell, the axial ends of the corresponding two tooth-type paddle wheels in two adjacent tooth-type unloading units are detachably connected, and the two transmission wheels are coaxially installed on the corresponding two tooth-type paddle wheels.

4. The automatic metering and packaging machine for rice processing according to claim 3, characterized in that: The geared paddle wheel has a dust suction chamber, one axial end of the geared paddle wheel is in an open state and connected to the dust suction chamber, the peripheral wall of the geared paddle wheel is covered with dust suction holes, an axial sealing cover is detachably connected to the open port of the geared paddle wheel, a connecting shaft is connected to the other axial end of the geared paddle wheel, and a conducting shaft tube is connected to the axial sealing cover, the axes of the connecting shaft, the conducting shaft tube and the geared paddle wheel coincide, and the connecting shaft and the conducting shaft tube are rotatably connected to two opposite fixed end covers of the assembly shell respectively, and the dust suction pipe is connected to the dust suction chamber via the conducting shaft tube.

5. The automatic metering and packaging machine for rice processing according to claim 4, characterized in that: The dust suction pipe system includes an adapter sleeve that is rotatably mounted on the outside of each conducting shaft tube, and a plurality of conducting holes are opened on the conducting shaft tube and at a position located inside the adapter sleeve. The adapter sleeve includes a first half sleeve body and a second half sleeve body, and the first half sleeve body and the second half sleeve body are assembled with each other to form a complete sleeve body. The first half sleeve body is connected to the dust suction branch pipe through a joint pipe, and each dust suction branch pipe is connected to the dust suction main pipe.

6. The automatic metering and packaging machine for rice processing according to claim 2, characterized in that: The horizontal two-station weighing base includes two horizontal driving members respectively arranged on both sides of the base body, and the two ends of each of the horizontal driving members are respectively connected to the base body and the frame. A plurality of weighing plates are installed on the base body, and these weighing plates are arranged one by one corresponding to a plurality of tooth-type feeding units, and a weighing sensor is installed in each weighing plate.

7. The automatic metering and packaging machine for rice processing according to claim 6, characterized in that: The vertical adjustment mechanism includes two vertical slide rails respectively arranged on both sides of the base body, a vertical slider is slidably connected to each of the vertical slide rails, a vertical driving member is installed between the vertical slider and the base body, and the two vertical sliders are transmission-connected to the air suction bag-supporting mechanism.

8. The automatic metering and packaging machine for rice processing according to claim 7, characterized in that: The air suction bag-holding mechanism comprises a plurality of bag-holding units arranged one-to-one corresponding to the plurality of material-tooth-type feeding units, and the bag opening heat-sealing mechanism comprises a plurality of heat-sealing units, each of which is detachably connected to the lower end of the corresponding bag-holding unit.

9. The automatic metering and packaging machine for rice processing according to claim 8, characterized in that: The bag-holding unit includes two strip-shaped air suction plates arranged opposite to each other, the two strip-shaped air suction plates are respectively connected to the first longitudinal rod and the second longitudinal rod, and the first longitudinal driving member and the second longitudinal driving member are respectively installed on the two vertical sliders, and the first longitudinal driving member and the second longitudinal driving member are respectively connected to the first longitudinal rod and the second longitudinal rod.

10. The automatic metering and packaging machine for rice processing according to claim 9, characterized in that: The heat sealing unit includes two elastic magnetic heat sealing components respectively installed on two strip-shaped air suction plates, each of the elastic magnetic heat sealing components includes two connecting plates respectively installed at both ends of the strip-shaped air suction plates, a movable rod is movably connected to each connecting plate, a magnetic suction cup is constructed at one end of the movable rod, an electromagnet is installed on the connecting plate, a copper spring is sheathed on the outer surface of the movable rod, two ends of the copper spring are respectively connected to the magnetic suction cup and the connecting plate, a heat sealing rod is connected to the other end of the movable rod, the heat sealing rod extends along the length direction of the strip-shaped air suction plate, and the movable rod extends along the width direction of the strip-shaped air suction plate.

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