CN117302606A - A discharging device that can improve filling efficiency - Google Patents

Abstract

The invention discloses a discharging device capable of improving filling efficiency in the field of packaging machinery, which comprises a main body frame and a feeding pipe, wherein a weighing device is arranged on the main body frame, a packing auger feeding mechanism is arranged in the feeding pipe, a bag pressing device is arranged on the main body frame corresponding to the periphery of the feeding pipe, the bag pressing device comprises two bag pressing cylinders which are symmetrically arranged left and right, a piston rod of each bag pressing cylinder is connected with a guide rod through a universal joint, one inward end of each guide rod is provided with an arc-shaped compression ring, the radian of each arc-shaped compression ring is consistent with that of the feeding pipe, a guide seat with a self-lubricating bearing is arranged between each guide rod and the main body frame, a pin groove is formed in the guide rod along the length direction of each guide rod, a positioning pin is arranged on each guide seat corresponding to each pin groove, an end cover of each bag pressing cylinder is arranged on the main body frame through a connecting component, and an upper bag detecting device is arranged between the corresponding two arc-shaped compression rings on the main body frame. Under the condition of a certain structural space, the inner diameter of the feeding pipe is enlarged, and the filling speed is improved.

Description

A discharging device that can improve filling efficiency

Technical field

The invention belongs to the technical field of packaging machinery, and particularly relates to a discharging device that can improve filling efficiency.

Background technique

The valve bag is a commonly used bulk powder packaging bag. It uses a special filling packaging machine to feed the material from the bag mouth at the top and side of the valve bag. After filling according to the specified weight, the bag mouth is sealed to complete the packaging process. During the filling process, an airbag bag clamp is usually used to fix the mouth of the valve bag on the mouth of the feeding pipe, and inflate the air bag to achieve sealing of the bag mouth and the pipe mouth. The disadvantage is that when the valve bag When the size of the bag mouth is certain, there needs to be an expansion gap of the air bag between the bag mouth and the pipe mouth. As a result, the diameter of the mouth of the feeding pipe is much smaller than the size of the bag mouth, which seriously affects the filling efficiency of the valve bag.

Contents of the invention

The purpose of the present invention is to provide a discharging device that can improve filling efficiency. When the size of the valve bag opening is constant, the inner diameter of the feeding pipe can be expanded as much as possible to increase the filling speed.

In order to achieve the above object, the present invention adopts the following technical solution: a discharging device that can improve filling efficiency, including a main frame and a feeding tube. The main frame is provided with a weighing device, and the feeding tube is provided with a weighing device. Auger feeding mechanism, the main frame is provided with a bag pressing device corresponding to the periphery of the feeding pipe. The bag pressing device includes two bag pressing cylinders arranged symmetrically. The piston rod of the bag pressing cylinder is connected to the bag pressing cylinder through a universal joint. The guide rod is connected. The inward end of the guide rod is provided with an arc-shaped pressure ring. The curvature of the arc-shaped pressure ring is consistent with the curvature of the feed tube. A self-lubricating bearing is provided between the guide rod and the main frame. The guide seat is provided with a pin groove along its length direction. The guide seat is provided with a positioning pin corresponding to the pin groove. The end cover of the bag pressing cylinder is set on the main frame through a connecting assembly. The main body A bag detection device is provided between the corresponding two arc-shaped pressure rings on the frame.

When using the present invention, first set the mouth of the valve bag on the feed pipe. After the bag detection device detects that the bag mouth is in place, the two bag pressing cylinders work at the same time, and the piston rod extends to push the guide rod to move toward the feed pipe. , thus driving the arc-shaped pressing ring to lock the bag mouth tightly on the feeding pipe, and the auger rotates to perform the filling action. After the weighing device detects the set weight, the auger feeding mechanism stops feeding, and the two bag pressing cylinders The piston rod retracts at the same time, driving the arc-shaped pressure ring to reset, and then the valve bag can be removed for the next process. Compared with the prior art, the beneficial effects of the present invention are that: the air bag structure provided on the feeding pipe is eliminated, and the valve bag is fixed and sealed through an external bag pressing cylinder and an arc-shaped pressing ring. When the mouth size is certain, the discharge capacity of powder in the feeding pipe is improved by expanding the inner diameter of the feeding pipe; the feeding pipe and the weighing device are both set on the main frame, which ensures that the accuracy of the weighing is not affected by The influence of the auger feeding mechanism; the use of universal joints can ensure the coaxiality of the guide rod and the piston rod of the bag pressing cylinder, improving the reliability and service life of the device; the positioning pin can prevent the guide rod from rotating during movement and ensure the arc shape The pressure ring can fit with the outer wall of the feed tube to improve the clamping sealing performance.

As a further improvement of the solution of the present invention, the upper bag detection device includes a cylinder bracket and a detection cylinder. The end of the piston rod of the detection cylinder is provided with a pressure measuring joint. The side of the pressure measuring joint is connected to the trachea. The pressure measuring joint The bottom of the joint is connected to the detection block. A vertical air channel is provided in the detection block, and a three-way channel is provided at the corresponding air channel of the feeding pipe. The pressure change in the airway can be measured through the pressure measuring joint to quickly detect whether the valve bag is in place.

As a further improvement of the solution of the present invention, the cylinder bracket includes a rectangular bottom plate, a horizontal support plate and an L-shaped pressure plate. Reinforcement ribs are provided between the rectangular bottom plate and the support plate. The detection cylinder is arranged on the support plate. The angle at the folded corner of the L-shaped pressing plate is less than 90°. The cylinder bracket not only provides support for the detection cylinder, but also assists in positioning the valve pocket.

As a further improvement of the solution of the present invention, the main frame includes a left panel and a right panel arranged symmetrically with each other, a rear panel is arranged between the rear sides of the left panel and the right panel, and the front sides of the left panel and the right panel correspond to The bag detection device is provided with an upper cover plate, and the bottom of the upper cover plate is provided with an arc-shaped avoidance portion corresponding to the feeding pipe. It can beautify the appearance of the equipment while ensuring product quality and saving maintenance costs.

As a further improvement of the solution of the present invention, the main frame is provided with a dust removal interface corresponding to the feeding pipe, and a dust removal pipe is provided outside the dust removal interface, and the dust removal pipe is connected to a vacuum suction mechanism. It can clean up excess powder to prevent dust from leaking and polluting the working environment.

As a further improvement of the solution of the present invention, the auger feeding mechanism includes an auger shaft. The auger shaft includes a transmission section, a mixing section, a reduction section and a feeding section arranged in sequence from left to right. The transmission section is provided with There is a transmission mechanism, the input end of the transmission mechanism is connected to the auger motor, the mixing section is arranged in the valve port silo, and an inner tube is provided outside the reducing section and the feeding section, and the inner tube is placed It is arranged inside the feeding tube and coaxially with the feeding tube, and there is a gap between the outer wall of the inner tube and the inner wall of the feeding tube. While ensuring the mixing efficiency of the powder, the diameter of the feeding section is reduced, and the discharge space of the inner tube is further expanded to increase the feeding speed.

As a further improvement of the solution of the present invention, spiral blades are provided on the periphery of the mixing section, reducing section and feeding section, and the pitch of the spiral blades gradually increases from left to right. It can prevent powder material from clogging in the feeding section and ensure smooth feeding.

As a further improvement of the solution of the present invention, a bag holding frame is provided on the main body frame corresponding to the lower part of the feeding pipe. The weighing device includes a first weighing sensor and a second weighing sensor. The first sensor is arranged on the main body. On the top of the frame, the height of the horizontal plane where the second load cell is located is not higher than the height of the horizontal plane where the bag holding frame is located. The two load cells bear the load together, so their elastic deformation is less than when only one load cell is used, and only one bridge power supply is shared. The system is simple and economical.

As a further improvement of the solution of the present invention, a non-metallic elastic member is provided on the inner wall of the arc-shaped pressure ring. It can further ensure the sealing of the valve bag during filling.

As a further improvement of the solution of the present invention, a limiting baffle is provided on the rear side of the arc-shaped pressure ring corresponding to the feeding pipe. The upper bag position of the valve bag can be limited to ensure a constant position for subsequent heat sealing.

Description of the drawings

Figure 1 is a front view of a preferred embodiment of the present invention.

Figure 2 is a left side view of a preferred embodiment of the present invention.

Figure 3 is a schematic three-dimensional structural diagram of the bag pressing device of the present invention.

Figure 4 is a schematic structural diagram of the bag pressing device of the present invention when it is being reset.

Figure 5 is a left side view of the bag detection device of the present invention.

Figure 6 is a cross-sectional view taken along line A-A in Figure 5 .

Figure 7 is a front view of the auger feeding mechanism of the present invention.

Figure 8 is a cross-sectional view taken along line B-B in Figure 7 .

Among them, 1 main frame, 101 left panel, 102 right panel, 103 rear panel, 104 upper cover, 105 arc avoidance part, 2 feeding pipe, 201 tee channel, 3 flange, 4 weighing device, 401 One load cell, 402 second load cell, 5 auger feeding mechanism, 501 auger shaft, 502 transmission section, 503 mixing section, 504 reduction section, 505 feeding section, 506 spiral blade, 507 inner tube, 508 Transmission mechanism, 509 auger motor, 6 bag pressing devices, 601 bag pressing cylinder, 602 universal joint, 603 guide rod, 604 arc pressure ring, 605 elastic member, 606 guide seat, 607 pin groove, 608 positioning pin, 609 Connection components, 7 limit baffles, 8 bag holding frames, 9 bag upper detection device, 901 cylinder bracket, 901a rectangular bottom plate, 901b support plate, 901c L-shaped pressure plate, 901d reinforcement ribs, 902 detection cylinder, 903 pressure measuring joint, 904 detection block, 904a air channel, 10 dust removal pipe, 11 valve port silo, 12 valve bag.

Detailed ways

As shown in Figure 1-6, it is a discharging device that can improve filling efficiency, including a main frame 1 and a feeding pipe 2. The inward end of the feeding pipe 2 is installed on the main frame 1 through a flange 3. The main frame 1 is provided with a weighing device 4, and the feeding pipe 2 is provided with an auger feeding mechanism 5. The main frame 1 is provided with a bag pressing device 6 corresponding to the periphery of the feeding pipe 2. The bag pressing device 6 includes two left and right symmetrical A bag pressing cylinder 601 is provided. The piston rod of the bag pressing cylinder 601 is connected to the guide rod 603 through a universal joint 602. The inward end of the guide rod 603 is provided with an arc-shaped pressing ring 604. The curvature of the arc-shaped pressing ring 604 is consistent with the feeding material. The curvature of the tubes 2 is consistent; in order to enhance the sealing effect, a non-metallic elastic piece 605 is provided on the inner wall of the arc-shaped pressure ring 604, which can also avoid damage to the valve bag 12 due to extrusion and improve product quality; the corresponding arc on the feeding tube 2 A limiting baffle 7 is provided on the rear side of the pressure ring 604, which can limit the upper bag position of the valve bag 12 and ensure a constant subsequent heat sealing position; a guide seat with a self-lubricating bearing is provided between the guide rod 603 and the main frame 1 606, the guide rod 603 is provided with a pin groove 607 along its length direction, and the guide seat 606 is provided with a positioning pin 608 corresponding to the pin groove 607. The end cover of the bag pressing cylinder 601 is set on the outside of the main frame 1 through the connecting assembly 609; the main frame 1 There is a bag holding frame 8 corresponding to the bottom of the feeding pipe 2; the weighing device 4 includes a first weighing sensor 401 and a second weighing sensor 402. The first weighing sensor 401 is arranged on the top of the main frame 1, and the second weighing The height of the horizontal plane where the sensor 402 is located is not higher than the height of the horizontal plane where the bag holding frame 8 is located; an upper bag detection device 9 is provided between the two corresponding arc-shaped pressure rings 604 on the main frame 1; the upper bag detection device 9 includes a cylinder bracket 901 and detection cylinder 902. The end of the piston rod of the detection cylinder 902 is provided with a pressure measuring joint 903. The side of the pressure measuring joint 903 is connected to the trachea. The bottom of the pressure measuring joint 903 is connected to the detection block 904. The detection block 904 is connected to the arc pressure ring 604. The front and rear offset settings are set; the detection block 904 is provided with a vertical air channel 904a, and the feed pipe 2 is provided with a three-way channel 201 corresponding to the air channel 904a; preferably, the cylinder bracket 901 includes a rectangular bottom plate 901a, horizontal support plates 901b and L The L-shaped pressing plate has a reinforcing rib 901d between the rectangular bottom plate 901a and the supporting plate 901b. The detection cylinder 902 is arranged on the supporting plate 901b. The angle at the corner of the L-shaped pressing plate is less than 90°. Preferably, the corner is designed to be arc-shaped. The chamfering can prevent the L-shaped pressure plate from scratching the valve pocket 12 and ensure its regular appearance.

The main frame 1 includes a left panel 101 and a right panel 102 that are symmetrically arranged with each other. A rear panel 103 is provided between the rear sides of the left panel 101 and the right panel 102. The upper bag detection device 9 is provided on the front side of the left panel 101 and the right panel 102. The upper cover 104 has an arc-shaped escape portion 105 at the bottom corresponding to the feed pipe 2; the left panel 101 or the right panel 102 is provided with a dust removal interface corresponding to the feed pipe 2, and a dust removal pipe 10 is provided outside the dust removal interface. The pipe 10 is connected to the vacuum cleaner mechanism; the electric exhaust fan of the vacuum cleaner mechanism runs at high speed after being powered on, so that the air pressure inside the dust removal pipe 10 is much lower than the outside air pressure. Under the action of this air pressure difference, the surroundings of the feeding pipe 2 The excess powder will enter the barrel of the dust collection mechanism along with the airflow to ensure a clean production environment and the health of workers.

The auger feeding mechanism 5 will be described in detail below with reference to Figures 7 and 8. The auger feeding mechanism 5 includes an auger shaft 501. The auger shaft 501 includes a transmission section 502, a mixing section 503, and a reduction section arranged in sequence from left to right. Section 504 and feeding section 505, the transmission section 502 is provided with a transmission mechanism 508, and the input end of the transmission mechanism 508 is connected to the auger motor 509; common transmission mechanisms 508 include a cam mechanism, a worm gear transmission mechanism 508, a belt transmission mechanism 508, For the chain transmission mechanism 508 and the gear transmission mechanism 508, in this embodiment, the belt transmission mechanism 508 with smooth and noiseless movement is selected, which has the advantages of simple structure, long transmission distance, simple installation and convenient maintenance; the mixing section 503 is arranged at In the valve silo 11, an inner tube 507 is provided outside the reducing section 504 and the feeding section 505. The inner tube 507 is placed in the feeding pipe 2 and is coaxially arranged with the feeding pipe 2. The outer wall of the inner pipe 507 is in contact with the feeding pipe. There is a gap between the inner walls of the tube 2; spiral blades 506 are provided on the periphery of the mixing section 503, the reducing section 504 and the feeding section 505, and the pitch of the spiral blade 506 gradually increases from left to right.

When the present invention is in use, after the bag mouth of the valve bag 12 is placed on the feeding pipe 2, the two bag pressing cylinders 601 work simultaneously, and the piston rod of the bag pressing cylinder 601 extends to push the guide rod 603 to move toward the feeding pipe 2, thereby The arc-shaped pressure ring 604 is driven to lock the bag mouth tightly on the feed pipe 2. At the same time, the detection cylinder 902 works to drive the detection joint downward until it connects with the valve bag 12 or the feed pipe 2; when the bag mouth is not set in place, The air flow in the trachea is connected to the atmosphere through the airway 904a and the three-way channel 201. When the bag mouth is installed in place, it covers the three-way channel 201. When the air pressure in the pressure measuring joint 903 rises to the set value instantaneously, the control system issues a filling command. , the auger motor 509 works, driving the auger shaft 501 to rotate through the belt transmission mechanism 508, the mixing section 503 can improve the density of the powder, and the spiral blade 506 can ensure uniform discharging; when performing the filling action, the auger motor 509 first Rotating at high speed, the auger feeding mechanism 5 performs a coarse feeding action. While filling the valve bag 12 with coarse feeding, the load sensor 402 weighs the valve bag 12; when the valve bag 12 reaches the set coarse feeding After the weight is reached, the auger motor 509 slows down and rotates, and the auger feeding mechanism 5 then performs the fine feeding action until the sensor senses that the valve bag 12 reaches the set fine feeding weight, completing a complete set of filling actions; weighing device 4. After detecting the set weight, the auger feeding mechanism 5 stops feeding, and the piston rods of the two bag pressing cylinders 601 retract at the same time, driving the arc pressing ring 604 to reset. The vacuum cleaning mechanism can prevent the arc pressing ring 604 from opening. In case of instantaneous powder overflow, the following process can be carried out after removing the valve bag 12. The advantages of the present invention are: the device has the advantages of compact structure, small floor space and less dust spillage; under certain limitations of the space structure, the device improves the powder filling valve by increasing the diameter of the feeding pipe 2 Pocket 12 efficiency.

The present invention is not limited to the above embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features without any creative work based on the disclosed technical content. Modifications, these substitutions and modifications are within the protection scope of the present invention.

Claims (10)

1. A discharging device that can improve filling efficiency, including a main frame and a feeding tube. The main frame is provided with a weighing device, and the feeding tube is provided with an auger feeding mechanism. The characteristic is that the A bag pressing device is provided on the main frame corresponding to the periphery of the feeding pipe. The bag pressing device includes two bag pressing cylinders arranged symmetrically. The piston rod of the bag pressing cylinder is connected to the guide rod through a universal joint. The inward end of the guide rod is provided with an arc-shaped pressure ring. The curvature of the arc-shaped pressure ring is consistent with the curvature of the feed pipe. A guide seat with a self-lubricating bearing is provided between the guide rod and the main frame. The guide rod is provided with a pin groove along its length direction, and the guide seat is provided with a positioning pin corresponding to the pin groove. The end cover of the bag pressing cylinder is set on the main frame through a connecting assembly, and the main frame corresponds to two arcs. A bag detection device is provided between the forming pressure rings. 2. A discharging device capable of improving filling efficiency according to claim 1, characterized in that the bag detection device includes a cylinder bracket and a detection cylinder, and a detection cylinder is provided at the end of the piston rod of the detection cylinder. Pressure joint, the side of the pressure measuring joint is connected to the air pipe, the bottom of the pressure measuring joint is connected to the detection block, the detection block is equipped with a vertical air channel, and the feeding pipe is provided with three air channels corresponding to the detection block. Passage. 3. A discharging device capable of improving filling efficiency according to claim 2, characterized in that the cylinder bracket includes a rectangular bottom plate, a horizontal support plate and an L-shaped pressure plate, the rectangular bottom plate and the support plate Reinforcing ribs are arranged between them, the detection cylinder is arranged on the support plate, and the angle at the corner of the L-shaped pressure plate is less than 90°. 4. A discharging device capable of improving filling efficiency according to claim 1, characterized in that the main frame includes a left panel and a right panel arranged symmetrically with each other, and the rear side of the left panel and the right panel is A rear panel is provided between the left and right panels, an upper cover plate is provided on the front side of the left panel and the right panel corresponding to the upper bag detection device, and an arc-shaped avoidance portion is provided at the bottom of the upper cover plate corresponding to the feeding pipe. 5. A discharging device capable of improving filling efficiency according to claim 1, characterized in that the main frame is provided with a dust removal interface corresponding to the feeding pipe, and a dust removal pipe is provided outside the dust removal interface. The dust removal pipe is connected to the vacuum cleaner mechanism. 6. A discharging device capable of improving filling efficiency according to claim 1, characterized in that the auger feeding mechanism includes an auger shaft, and the auger shaft includes transmissions arranged sequentially from left to right. section, mixing section, reducing section and feeding section. The transmission section is provided with a transmission mechanism. The input end of the transmission mechanism is connected to the auger motor. The mixing section is arranged in the valve port silo, corresponding to all the The reducing section and the feeding section are covered with an inner tube. The inner tube is placed in the feeding tube and is coaxially arranged with the feeding tube. There is a gap between the outer wall of the inner tube and the inner wall of the feeding tube. 7. A discharging device capable of improving filling efficiency according to claim 6, characterized in that spiral blades are provided on the periphery of the mixing section, reducing section and feeding section, and the pitch of the spiral blades is from It gradually increases from left to right. 8. A discharging device capable of improving filling efficiency according to claim 1, characterized in that a bag holding frame is provided on the main frame corresponding to the lower part of the feeding pipe, and the weighing device includes a first weighing device. Load sensor and second load sensor, the first sensor is arranged on the top of the main body frame, and the height of the horizontal plane where the second load sensor is located is not higher than the height of the horizontal plane where the bag holding frame is located. 9. A discharging device capable of improving filling efficiency according to any one of claims 1 to 8, characterized in that a non-metallic elastic piece is provided on the inner wall of the arc-shaped pressure ring. 10. A discharging device capable of improving filling efficiency according to any one of claims 1 to 8, characterized in that a limiting baffle is provided on the rear side of the arc-shaped pressure ring corresponding to the feeding tube.