A lithium hydroxide powder packaging system

Abstract

The present invention discloses a lithium hydroxide powder packaging system, including a packaging machine, a bag holding walking mechanism, a bag sewing machine, a bag pushing machine, a metal detector, a weight re-inspection machine, a shaping machine, a coding conveyor, a stacking mechanism and a control system connected in sequence along the conveying direction of a conveyor line, wherein the packaging machine includes a frame, a silo, a single-point weighing sensor, a bag clamping mechanism, and a bag supporting mechanism, wherein the silo is fixed on the frame, one end of the single-point weighing sensor is fixed on the frame, and the other end is fixedly connected to the bag clamping mechanism, and the bag clamping mechanism is fixedly connected to the bag supporting mechanism. The lithium hydroxide powder packaging system provided by the present invention realizes the intelligent automatic packaging of lithium hydroxide, improves the packaging efficiency, realizes the accurate weighing of materials, and fully recycles the materials, reduces the cost, and prevents the damage of the floating lithium hydroxide dust to the environment and the staff.

Description

Technical Field

[0001] The invention relates to the technical field of material packaging equipment, in particular to a lithium hydroxide powder packaging system. Background Art

[0002] Lithium hydroxide powder is an important raw material in the lithium battery industry. It is expensive, so it is very important to weigh it accurately during packaging. Lithium hydroxide has a spicy taste, is highly alkaline and corrosive, and easily absorbs carbon dioxide and water in the air. The lithium hydroxide dust that floats out during the unloading and packaging process is seriously harmful to the environment and operators. Therefore, it is very important to realize automatic packaging of lithium hydroxide, improve packaging efficiency, and reduce manual participation in order to protect the environment, ensure the safety of operators, and reduce labor costs. At the same time, recycling the scattered materials is also very important for protecting the environment and reducing costs. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a lithium hydroxide powder packaging system, which realizes the intelligent automatic packaging of lithium hydroxide, improves the packaging efficiency, realizes the accurate weighing of materials, and removes and recycles the materials, thereby avoiding damage to the environment and personnel safety and reducing costs.

[0004] The technical solution adopted by the present invention is:

[0005] A lithium hydroxide powder packaging system comprises a packaging machine, a bag holding walking mechanism, a bag sewing machine, a bag pushing machine, a metal detector, a weight re-inspection machine, a shaping machine, a coding conveyor, a stacking mechanism and a control system which are sequentially connected along the conveying direction of a conveyor line. The packaging machine comprises a frame, a silo, a single-point weighing sensor, a bag clamping mechanism and a bag supporting mechanism. The silo is fixed on the frame, one end of the single-point weighing sensor is fixed on the frame, and the other end is fixedly connected to the bag clamping mechanism, and the bag clamping mechanism is fixedly connected to the bag supporting mechanism.

[0006] By setting a single-point weighing sensor, one end of which is connected to the frame and the other end is connected to the bag clamping mechanism and the bag supporting mechanism. When the material is unloaded and packaged, the material packaging bag is clamped on the bag clamping mechanism, and the bag supporting mechanism supports the bag opening to prevent the material from spilling outside the packaging bag. During the unloading process, the packaging material amount is weighed by the single-point weighing sensor. When the packaging weight requirement is met, the single-point weighing sensor sends a signal to the control system, and the control system closes the upstream valve and stops unloading, thereby reducing the number of sensors and thus reducing the time for calibrating the weighing sensors. At the same time, the unstable factors of weighing are reduced, and the accuracy of weighing is improved.

[0007] Preferably, a first driving device is fixed on the top of the silo, and the bottom is fixedly connected to a discharge pipe. A fin valve is provided in the discharge pipe, and the fin valve includes a valve plate and a valve stem, and the valve stem vertically penetrates the silo; the first driving device drives the valve stem to move up and down, and the bottom of the valve stem is horizontally connected to the valve plate shaft, and the valve plate is rotatably connected to the valve plate shaft; sliding shafts are fixedly connected on both sides of the valve plate, and eight-shaped slide grooves are respectively provided on the opposite sides of the lower end of the discharge pipe wall, and the sliding shaft is slidably connected to the slide groove. When the sliding shaft moves to the lowest end of the slide groove, the valve plate completely closes the pipe mouth of the discharge pipe.

[0008] The first drive device drives the valve stem to move up and down, thereby driving the sliding shaft on the valve plate to reciprocate along the slide groove; when the packaging and feeding starts, the valve stem drives the valve plate to move to the highest point, at which time the fin valve opens to the maximum, and rough material is discharged; when the single-point weighing sensor detects that the feed weight is close to the packaging requirement, the valve stem drives the valve plate to move downward along the slide groove, and the fin valve opening gradually decreases for precise material discharge until the process value required for packaging is reached, and the valve plate of the fin valve is closed; the ingenious design of the fin valve improves the packaging efficiency while ensuring the weighing accuracy; the valve plate moves up and down to stir and loosen the material in the discharge pipe, thereby preventing the material from arching.

[0009] Preferably, a trapezoidal groove is provided at the lower edge of the valve plate, and baffles are provided on the tube walls on both sides of the lower end of the discharge pipe where no chute is provided, and the width of the baffle is the same as the width of the valve plate. When the sliding shaft moves to the lowest end of the chute, the lower edge of the baffle contacts the upper surface of the valve plate and covers the trapezoidal groove, thereby completely closing the discharge pipe opening. The design of the trapezoidal groove ensures that the material will not be immediately stopped when the lower edge of the valve plate reaches the baffle, but the material will pass through the trapezoidal groove. As the valve plate moves, the baffle gradually covers the trapezoidal groove, and the area through which the material can pass becomes smaller and smaller, and the material discharge becomes more and more accurate, until the baffle completely covers the trapezoidal groove, and the valve plate and the baffle completely close the discharge pipe opening, further improving the accuracy of material weighing.

[0010] Preferably, a bag holding and rotating device is provided before the bag pushing machine on the conveyor line, and the bag holding and rotating device comprises a frame, a lifting mechanism, a clamping mechanism, and a rotating mechanism; the lifting mechanism comprises a lifting cylinder and a lifting bracket, the lifting cylinder is fixed on the frame, and the piston rod of the lifting cylinder is fixedly connected to the lifting bracket; the clamping mechanism comprises a clamping bracket, a clamping cylinder, a first bag clamp and a second bag clamp, the clamping cylinder and the first bag clamp are respectively fixed on the clamping bracket, the piston rod of the clamping cylinder is rotatably connected to the second bag clamp, and the clamping cylinder controls the opening and closing of the first bag clamp and the second bag clamp; the rotating mechanism connects the lifting mechanism and the clamping mechanism, and drives the clamping mechanism to rotate in a horizontal plane.

[0011] The piston rod of the clamping cylinder in the clamping mechanism retracts or extends to drive the second bag clamp to separate and clamp from the first bag clamp, so as to loosen or clamp the bagged material; the piston rod of the lifting cylinder retracts or extends to drive the clamping mechanism to move up and down, so as to lift or put down the bagged material; the rotating mechanism drives the clamping mechanism to rotate in the horizontal plane; the organic coordination of the lifting mechanism, the rotating mechanism and the clamping mechanism realizes the operations of clamping, lifting, rotating and putting down the bagged material.

[0012] Preferably, a guide rail is fixed on the frame in the vertical direction, a slider is slidably connected to the guide rail, the slider is fixedly connected to the single-point weighing sensor, and the slider is driven by a second driving device to move up and down along the guide rail; after the material is loaded, the slider moves downward along the guide rail, driving the bag clamping mechanism to send the packaging bag back to the conveyor line, and the packaging bag loaded with the material moves to the next workstation along the conveyor line; the slider moves upward along the guide rail, driving the bag clamping mechanism to reset, and then the next packaging and unloading is carried out.

[0013] Preferably, the bag clamping mechanism includes a clamping plate and a bag clamping cylinder, and the bag clamping cylinder controls the opening and closing of the clamping plate; the bag supporting mechanism includes a support seat, a support cylinder, a connecting rod, a first bracket, a second bracket and a supporting rod, the support seat is fixedly connected to the bag clamping cylinder, and the two ends are rotatably connected to the first bracket and the second bracket respectively, the cylinder body end and the piston rod end of the support cylinder are rotatably connected to the same end of the first bracket and the second bracket respectively, the two ends of the connecting rod are rotatably connected to the first bracket and the second bracket respectively, and are cross-arranged with the support seat, and the other ends of the first bracket and the second bracket are respectively provided with supporting rods. The bag supporting mechanism adopts a four-bar linkage mechanism, which is flexible in action. By extending and retracting the piston rod of the support cylinder, the distance between the two supporting rods is adjusted to meet the needs of packaging bags of different sizes.

[0014] Preferably, a weighing sensor is provided on the fulcrum of the frame supporting the silo. The weighing sensor and the first driving device are respectively connected to the control system in communication. The weighing sensor detects the material discharge amount of the silo in real time, and can also control the opening and closing of the fin valve. The dual weighing setting of the weighing sensor and the single-point weighing sensor further ensures the accuracy of the material packaging weighing; the weighing sensor can not only play the role of weighing the material discharge, but also serve as a continuous material level meter. When the weighing sensor detects that the weight of the material in the silo reaches the set minimum value, the control system opens the upstream valve to feed the silo; when it is detected that the material in the silo reaches the maximum value, the control system closes the upstream valve and stops feeding, realizing automatic feeding of the silo.

[0015] Preferably, it also includes a dust removal hood arranged above the discharge port of the discharge pipe, one end of the dust removal hood is fixed on the slider, and a dust removal interface is provided on the top, and the dust removal interface is connected to a dust removal system arranged outside the packaging machine. By setting the dust removal hood, the dust dispersed during the packaging and unloading process is sucked away by the dust removal system from the dust removal interface and recycled, thereby preventing the scattered lithium hydroxide dust from damaging the environment and the staff, and recycling the scattered materials, preventing the waste of materials and reducing costs.

[0016] A lithium hydroxide powder packaging system provided by the present invention reduces the number of sensors and thus reduces the time for calibrating the weighing sensors, thereby improving the weighing accuracy by setting a single-point weighing sensor; realizes the organic combination of rough feeding and precise feeding by setting a fin valve, thereby ensuring the feeding accuracy and improving the work efficiency, and preventing the material from arching; realizes the horizontal rotation of the bagged material by setting a bag holding rotation mechanism, has a simple structure, and realizes automatic operation; and recovers the scattered material by setting a dust removal hood and a dust removal system, thereby preventing the waste of material, reducing the cost, and preventing the scattered lithium hydroxide dust from damaging the environment and the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the packaging system of the present invention;

[0018] Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall structure of the packaging machine of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the single-point weighing sensor and the bag clamping mechanism of the present invention;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the bag-supporting mechanism;

[0022] Figure 6 It is a three-dimensional structural diagram of the silo and fin valve part;

[0023] Figure 7 It is a structural schematic diagram of the fin valve;

[0024] Figure 8 It is a three-dimensional disassembled structural schematic diagram of the fin valve;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the bag holding rotating device;

[0026] Fig.10 It is a schematic diagram of the installation position structure of the dust cover.

[0027] Figure numerals: 1, packaging machine; 2, bag holding walking mechanism; 3, bag sewing machine; 4, bag pushing machine; 5, metal detector; 6, weight re-inspection machine; 7, inkjet conveyor; 8, shaping machine; 9, palletizing mechanism; 10, conveyor line; 11, dust removal system; 12, automatic pallet warehouse; 13, palletizing robot; 14, forklift; 15, packaging bag; 100, rack; 101, silo; 102, single-point weighing sensor; 103, bag clamping mechanism; 1031, clamping plate; 1032, bag clamping cylinder; 104, bag supporting mechanism; 1041, support seat; 1042, support cylinder; 1043, connecting rod; 1044, first bracket; 1045, second bracket; 1046, support rod; 105, first servo motor; 106, discharge pipe ; 1061, slide; 1062, baffle; 107, fin valve; 1071, valve plate; 1072, valve stem; 1073, valve plate shaft; 1074, sliding shaft; 1075, trapezoidal groove; 108, guide rail; 109, slider; 110, dust removal interface; 111, weighing sensor; 112, dust removal hood; 200, bag holding rotation device; 201, frame; 202, lifting mechanism; 2021, lifting cylinder; 2022, lifting bracket; 203, clamping mechanism; 2031, clamping bracket; 2032, clamping cylinder; 2033, first bag clamp; 2034, second bag clamp; 204, rotating mechanism; 2041, rotating cylinder; 2042, rack; 2043, fan gear; 2044, connecting rod. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0029] A lithium hydroxide powder packaging system comprises a packaging machine 1, a bag holding walking mechanism 2, a bag sewing machine 3, a bag pushing machine 4, a metal detector 5, a weight re-inspection machine 6, a coding conveyor 7, a shaping machine 8, a stacking mechanism 9 and a control system (not shown in the figure) connected in sequence along the conveying direction of a conveyor line 10. The packaging machine comprises a frame 100, a silo 101, a single-point weighing sensor 102, a bag clamping mechanism 103, and a bag holding mechanism 104. The silo 101 is fixed on the frame 100. One end of the single-point weighing sensor 102 is fixed on the frame 100, and the other end is fixedly connected to the bag clamping mechanism 103. The bag clamping mechanism 103 is fixedly connected to the bag holding mechanism 104. The bag clamping mechanism 103 comprises a clamping plate 1031 and a bag clamping cylinder 1032. The bag clamping cylinder 1032 controls the clamping plate 101. 031 is opened and closed, thereby loosening or clamping the packaging bag 15; the bag-holding mechanism 104 includes a support seat 1041, a support cylinder 1042, a connecting rod 1043, a first bracket 1044, a second bracket 1045 and a support rod 1046. The support seat 1041 is fixedly connected to the bag-clamping cylinder 1032, and the two ends are rotatably connected to the first bracket 1044 and the second bracket 1045 respectively. The cylinder body end and the piston rod end of the support cylinder 1042 are rotatably connected to the same end of the first bracket 1044 and the second bracket 1045 respectively. The two ends of the connecting rod 1043 are rotatably connected to the first bracket 1044 and the second bracket 1045 respectively, and are cross-arranged with the support seat 1041. The other ends of the first bracket 1044 and the second bracket 1045 are respectively provided with support rods 1046. The bag-supporting mechanism 104 adopts a four-link mechanism, which is flexible in movement. By extending and retracting the piston rod of the supporting cylinder 1042, the distance between the two support rods 1046 is adjusted to meet the needs of packaging bags of different sizes.

[0030] A first driving device is fixed on the top of the silo 101, and the first driving device is a first servo motor 105. The bottom is fixedly connected to a discharge pipe 106. A fin valve 107 is provided in the discharge pipe 106. The fin valve includes a valve plate 1071 and a valve stem 1072. The valve stem 1072 vertically penetrates the silo 101. The first servo motor 105 drives the valve stem 1072 to move up and down. The bottom of the valve stem 1072 is horizontally connected to a valve plate shaft 1073. The valve plate 1071 can be rotatably connected to the silo 101. On the valve plate shaft 1073; the sliding shaft 1074 is fixedly connected on both sides of the valve plate 1071, and the sliding shaft 1074 extends out of both sides of the valve plate 1071, and the two opposite sides of the lower end of the discharge pipe 106 wall respectively correspond to the eight-shaped slide grooves 1061, and the parts of the sliding shaft 1074 extending out of both sides of the valve plate 1071 are slidably connected with the slide groove 1061. When the sliding shaft 1074 moves to the lowest end of the slide groove 1061, the valve plate 1071 completely closes the pipe mouth of the discharge pipe 106.

[0031] In order to further improve the accuracy of material weighing, a trapezoidal groove 1075 is opened at the lower edge of the valve plate 1071 in this embodiment, and baffles 1062 are respectively provided on the two side walls of the lower end of the discharge pipe 106 where the slide groove 1061 is not opened. The width of the baffle 1062 is the same as the width of the valve plate 1071. When the sliding shaft 1074 moves to the lowest end of the slide groove 1061, the lower edge of the baffle 1062 contacts the upper surface of the valve plate 1071 and covers the trapezoidal groove 1075, thereby completely closing the pipe mouth of the discharge pipe 106. The design of the trapezoidal groove 1075 ensures that material discharge will not stop immediately when the lower edge of the valve plate 1071 reaches the baffle 1062, but allows the material to pass through the trapezoidal groove 1075. As the valve plate 1071 moves, the baffle 1062 gradually covers the trapezoidal groove 1075, and the area through which the material can pass becomes smaller and smaller, and the material discharge becomes more and more precise until the process value required for packaging is reached. At this time, the baffle 1062 completely covers the trapezoidal groove 1075, and the valve plate 1071 and the baffle 1062 completely close the outlet pipe 106, stopping material discharge, thereby further improving the accuracy of material weighing.

[0032] In this embodiment, a bag holding and rotating device 200 is provided before the bag pushing machine 4 on the conveyor line 10, and the bag holding and rotating device 200 includes a frame 201, a lifting mechanism 202, a clamping mechanism 203, and a rotating mechanism 204; the lifting mechanism 202 includes a lifting cylinder 2021 and a lifting bracket 2022, the lifting cylinder 2021 is fixed on the frame 201, and the piston rod of the lifting cylinder 2021 is fixedly connected to the lifting bracket 2022; the clamping mechanism 203 includes a clamping bracket 2 031, a clamping cylinder 2032, a first bag clamp 2033 and a second bag clamp 2034, the clamping cylinder 2032 and the first bag clamp 2033 are respectively fixed to the clamping bracket 2031, the piston rod of the clamping cylinder 2032 is rotatably connected to the second bag clamp 2034, the first bag clamp 2033 and the second bag clamp 2034 are rotatably connected, and the clamping cylinder 2032 controls the opening and closing of the first bag clamp 2033 and the second bag clamp 2034; the rotating mechanism 204 is connected The lifting mechanism 202 is connected to the clamping mechanism 203, and drives the clamping mechanism 203 to rotate in the horizontal plane; the rotating mechanism 204 includes a rotating cylinder 2041, a rack 2042, a sector gear 2043, and a connecting rod 2044. The rotating cylinder 2041 is fixed to the lifting bracket 2022, and the piston rod of the rotating cylinder 2041 is fixedly connected to the rack 2042; the sector gear 2043 is fixed to the top of the connecting rod 2044 and connected to the rack 20 42 is engaged; the connecting rod 2044 vertically passes through the lifting bracket 2022 and is rotatably connected to the lifting bracket 2022, and the lower end of the connecting rod 2044 is connected to the clamping bracket 2031; the piston rod of the rotating cylinder 2041 retracts or extends to drive the rack 2042 to reciprocate, and the rack 2042 is engaged with the fan gear 2043, converting the linear motion of the rack 2042 into the rotational motion of the fan gear 2043, thereby driving the clamping mechanism 203 to rotate through the connecting rod 2044.

[0033] In order to realize automatic packaging, weighing and transportation of materials, a guide rail 108 is fixed on the frame 100 in the present embodiment in the vertical direction, and a slider 109 is slidably connected to the guide rail 108. The slider 109 is fixedly connected to the single-point weighing sensor 102, and the slider 109 is driven by a second driving device to move up and down along the guide rail 108. The second driving device is a second servo motor (not shown in the figure); after the material is loaded, the slider 109 moves downward along the guide rail 108, driving the bag clamping mechanism 103 to send the packaging bag 15 back to the conveyor line 10, and the packaging bag 15 loaded with the material moves to the next station along the conveyor line 10; the slider 109 moves upward along the guide rail 108, driving the bag clamping mechanism 103 to reset, and the next packaging and unloading is carried out. The conveyor line 10 is a conveyor belt.

[0034] The fulcrum of the frame 100 supporting the silo 101 is provided with a weighing sensor 111. There are three weighing sensors 111, and the weighing sensors 111 and the first servo motor 105 are respectively connected to the control system for communication. The weighing sensor 111 can detect the material discharge amount of the silo 101 in real time, and can also control the opening and closing of the fin valve 107. The double weighing setting of the weighing sensor 111 and the single-point weighing sensor 102 further ensures the accuracy of the material packaging weighing. The weighing sensor 111 can not only play the role of weighing the material discharge, but also serve as a continuous material level meter. When the weighing sensor 111 detects that the weight of the material in the silo 101 reaches the set minimum value, the control system opens the upstream valve to feed the silo 101; when it is detected that the material in the silo 101 reaches the maximum value, the control system closes the upstream valve and stops feeding, thereby realizing the automatic feeding of the silo 101.

[0035] The present embodiment also includes a dust hood 112 disposed above the discharge port of the discharge pipe 106, wherein one end of the dust hood 112 is fixed to the slider 109, and a dust removal interface 110 is disposed on the top, and the dust removal interface 110 is connected to the dust removal system 11 disposed outside the packaging machine 1. By providing the dust hood 112, the dust dispersed during the packaging unloading process is sucked away by the dust removal interface 110 through the dust removal system 11 and recycled, thereby preventing the dispersed lithium hydroxide dust from damaging the environment and the staff, and recycling the dispersed materials, thereby preventing the waste of materials and reducing the cost.

[0036] The process of packaging lithium hydroxide powder is as follows: the bag clamping mechanism 103 clamps the mouth of the packaging bag 15, the bag holding mechanism 104 opens the mouth of the packaging bag 15, the control system controls the first servo motor 105 to drive the fin valve 107 to discharge the material, and when the weighing sensor 111 weighs the discharge amount to meet the packaging requirements, the fin valve 107 is closed to complete the discharge; during the discharge process, the single-point weighing sensor 102 weighs the packaging bag 15 filled with materials in real time and controls the discharge amount at the same time; the dust generated during the discharge process is sucked out by the dust removal cover 112 for recovery; after the discharge is completed, the second servo motor drives the slider 109 to move downward along the guide rail 108 to place the packaging bag 15 on the conveyor line 10; the bag holding walking mechanism 2 is actuated to transport the packaging bag 15 to the bag sewing machine 3 to seal the packaging bag 15 The sealed packaging bag 15 moves with the conveyor line 10 to the bag holding and rotating device 200, which rotates the packaging bag 15 horizontally by 90°, so that the long side of the bottom surface of the packaging bag 15 changes from being parallel to the conveyor line 10 to being perpendicular to the conveyor line 10; then the packaging bag 15 is pushed down by the bag pushing machine 4, and the material in the packaging bag 15 is subjected to metal detection by the metal detector 5, and the weight of the material in the packaging bag 15 is rechecked by the weight rechecking machine 6; the packaging bag 15 is sprayed with code by the coding conveyor 7; the material in the packaging bag 15 is evenly distributed in the packaging bag 15 by the shaping machine 8, which is conducive to palletizing; and then it is transported to the palletizing mechanism 9 for palletizing. The palletizing mechanism 9 includes an automatic pallet warehouse 12 and a palletizing robot 13. After the pallet is full, it is transported away by a forklift 14.

[0037] The above is a detailed introduction to a lithium hydroxide powder packaging system provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and central idea of ​​the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A lithium hydroxide powder packaging system, comprising a packaging machine, a bag holding walking mechanism, a bag sewing machine, a bag pushing machine, a metal detector, a weight re-inspection machine, a shaping machine, a coding conveyor, a stacking mechanism and a control system connected in sequence along the conveying direction of the conveyor line, characterized in that: The packaging machine comprises a frame, a silo, a single-point weighing sensor, a bag clamping mechanism, and a bag supporting mechanism. The silo is fixed on the frame, one end of the single-point weighing sensor is fixed on the frame, and the other end is fixedly connected to the bag clamping mechanism, and the bag clamping mechanism is fixedly connected to the bag supporting mechanism. A first driving device is fixed on the top of the silo, and the bottom is fixedly connected to a discharge pipe. A fin valve is arranged in the discharge pipe, and the fin valve comprises a valve plate and a valve stem, and the valve stem vertically penetrates the silo; a weighing sensor is arranged on the fulcrum of the frame supporting the silo; the first driving device drives the valve stem to move up and down, and the bottom of the valve stem is horizontally connected to the valve plate shaft, and the valve plate is rotatably connected to the valve plate shaft; sliding shafts are fixedly connected on both sides of the valve plate, and eight-shaped slide grooves are respectively provided on the opposite sides of the lower end of the discharge pipe wall, and the sliding shaft is slidably connected to the slide groove. When the sliding shaft moves to the lowest end of the slide groove, the valve plate completely closes the pipe mouth of the discharge pipe; A trapezoidal groove is provided at the lower edge of the valve plate, and baffles are respectively provided on the tube walls on both sides of the lower end of the discharge pipe where the slide groove is not provided, and the width of the baffle is the same as the width of the valve plate. When the sliding shaft moves to the lowest end of the slide groove, the lower edge of the baffle contacts the upper surface of the valve plate and covers the trapezoidal groove, thereby completely closing the discharge pipe opening; The bag clamping mechanism includes a clamping plate and a bag clamping cylinder, and the bag clamping cylinder controls the opening and closing of the clamping plate; the bag supporting mechanism includes a support seat, a support cylinder, a connecting rod, a first bracket, a second bracket and a support rod, the support seat is fixedly connected to the bag clamping cylinder, and the two ends are rotatably connected to the first bracket and the second bracket respectively, the cylinder body end and the piston rod end of the support cylinder are rotatably connected to the same end of the first bracket and the second bracket respectively, the two ends of the connecting rod are rotatably connected to the first bracket and the second bracket respectively, and are cross-arranged with the support seat, and the other ends of the first bracket and the second bracket are respectively provided with support rods.

2. A lithium hydroxide powder packaging system according to claim 1, characterized in that: A bag holding and rotating device is provided before the bag pushing machine on the conveyor line, and the bag holding and rotating device includes a frame, a lifting mechanism, a clamping mechanism, and a rotating mechanism; the lifting mechanism includes a lifting cylinder and a lifting bracket, the lifting cylinder is fixed on the frame, and the piston rod of the lifting cylinder is fixedly connected to the lifting bracket; the clamping mechanism includes a clamping bracket, a clamping cylinder, a first bag clamp and a second bag clamp, the clamping cylinder and the first bag clamp are respectively fixed on the clamping bracket, the piston rod of the clamping cylinder is rotatably connected to the second bag clamp, and the clamping cylinder controls the opening and closing of the first bag clamp and the second bag clamp; the rotating mechanism connects the lifting mechanism and the clamping mechanism, and drives the clamping mechanism to rotate in a horizontal plane.

3. A lithium hydroxide powder packaging system according to claim 1, characterized in that: A guide rail is fixed on the frame in the vertical direction, a slider is slidably connected to the guide rail, the slider is fixedly connected to the single-point weighing sensor, and the slider is driven by a second driving device to move up and down along the guide rail.

4. A lithium hydroxide powder packaging system according to claim 3, characterized in that: It also includes a dust removal cover arranged above the discharge port of the discharge pipe, one end of the dust removal cover is fixed on the sliding block, and a dust removal interface is arranged on the top, and the dust removal interface is connected to the dust removal system arranged outside the packaging machine.

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