CN103863592B - A high-precision weighing device - Google Patents

Abstract

The invention discloses a high-precision weighing machine, which comprises a frame, a feeding bin and a controller, wherein a track conveying mechanism is arranged below an outlet, a material jumping preventing component is arranged on a conveying track, a packaging bag clamping frame is arranged on the outer wall of a material guide plate, a weighing sensor is arranged on the packaging bag clamping frame, an air suction opening is formed in the inner wall of the material guide plate, and a suction fan is connected to the air suction opening Compact, high weighing precision, high speed, less dust, stable and reliable operation.

Description

A high-precision weighing device

【Technical field】

The invention relates to the technical field of weighing tools, in particular to a high-precision weighing device.

【Background technique】

The existing material packaging scales are all equipped with a weighing hopper. After setting the weight of a single bag on the control instrument, the material falls into the weighing hopper from the finished product silo through the feeding mechanism, and is installed next to the weighing hopper. There is a load cell, and the control system is fixed on the frame next to it, and the total weight value of the weighing bucket, bag gripper, and packaging bag with materials is fed back to the control system in real time, and the value is displayed by the controller. The equipment has the disadvantages of complex structure and slow speed, and when the material is introduced from the weighing hopper into the packaging bag, the dust generated will seriously affect the actual weight of the material in the packaging bag, and the weighing accuracy is low. There are three types of feeding methods: electromagnetic vibration feeding, screw feeding and self-flow feeding. During the feeding process, it is easy to cause more dust, and the stability of the material flow is difficult to control. There is also a self-flow type After feeding, the crawler is used to convey the material. However, when the material is a particle with good fluidity, such as beans, corn, wheat, rice, rice, etc., the item is easy to jump on the conveyor belt, which affects the feeding efficiency and weighing. precision.

【Content of invention】

The purpose of the present invention is to solve the problems in the prior art, and propose a high-precision weighing device, which can simplify the mechanical structure, reduce dust generation, improve weighing accuracy, and improve work efficiency.

In order to achieve the above object, the present invention proposes a high-precision weighing device, including a frame, a feeding bin and a controller, the feeding bin and the controller are fixed on the frame, and the feeding bin is provided with a feeding There is an outlet and an outlet in the feeding bin, and a crawler conveying mechanism is arranged below the outlet, and the crawler conveying mechanism includes a tensioning wheel, a driving wheel, a conveying crawler and a driving motor, and the conveying crawler is wrapped in On the tensioning wheel and the driving wheel, the driving wheel is connected with the driving motor, the conveying track is provided with an anti-material jumping component, and the material outlet is connected with a material guide plate with an elliptical cross section, and the material guide plate is A packaging bag clamping frame is arranged on the outer wall, and a weighing sensor is arranged on the packaging bag clamping frame. Suction fan.

Preferably, the anti-material jumping component includes several item slots, the item slots are evenly arranged on the outer surface of the conveyor belt, and the two adjacent item slots are connected by a buffer belt, which buffers the material mechanically to prevent the material from Falling from the exit to between two item slots causes the material to jump.

As a preference, a buffer sheet is provided on the bottom or the side wall of the item trough, and the cushioning of the buffer sheet is used to prevent the material from falling into the item trough and continue to jump or roll.

As a preference, the outlet of the feeding bin is provided with a solenoid valve, the solenoid valve is connected with a controller, and the controller issues instructions to control the opening and closing of the solenoid valve to the outlet of the feeding bin, so as to improve feeding accuracy and enhance stability.

Preferably, the frame is provided with a dust collection box, the dust collection box communicates with the air suction port through a communication channel, and the suction fan is fixedly installed in the connection channel, powered by the suction fan, to suck the dust from the air suction port, The dust is finally collected and deposited in the dust collection box through the connecting channel, so as to facilitate the recycling of resources and reduce resource consumption.

As a preference, a filter screen cover is installed on the air suction port, and the filter screen cover is used to filter materials with relatively large particles.

Beneficial effects of the present invention: In the present invention, the material enters the feeding bin from the feed port, falls onto the conveying track through its outlet, and flexibly adjusts the feeding speed by controlling the speed of the driving motor, and the anti-material on the conveying track The jumping component can prevent the items from falling into the conveyor belt and cause jumping or rolling. By connecting the material guide plate on the discharge port and setting the load cell on the clamping frame of the packaging bag, the load cell can directly give out the package through the controller. The weight of the bag saves the weighing hopper of the traditional equipment. Even if the material generates dust when it enters the packaging bag from the feeding bin, it will not affect the weighing accuracy. It simplifies the mechanical structure and improves the weighing accuracy at the same time. The material guide plate is provided with a suction port to effectively remove the generated dust. Compared with the prior art, the present invention has the advantages of simple and compact structure, high weighing accuracy, fast speed, less dust, stable and reliable operation.

The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

【Description of drawings】

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the conveyor belt in the present invention.

In the figure: 1-frame, 2-feeding bin, 3-controller, 4-inlet, 5-outlet, 6-guide plate, 7-packing bag clamping frame, 8-load sensor , 9-suction port, 10-suction fan, 11-solenoid valve, 12-communication channel, 13-dust collection box, 14-filter screen cover, 15-exit, 16-tensioning wheel, 17-driving wheel, 18- Conveyor track, 81-item slot, 82-buffer belt, 83-buffer sheet, 19-drive motor.

【detailed description】

Referring to Fig. 1 and Fig. 2, the present invention comprises frame 1, feeding bin 2 and controller 3, and described feeding bin 2 and controller 3 are fixed on the frame 1, and feeding bin 2 is provided with feeding port 4 and the discharge port 5, an outlet 15 is provided in the feeding bin 2, and a crawler conveyor mechanism is provided below the outlet 15, and the crawler conveyor mechanism includes a tensioning wheel 16, a drive wheel 17, a conveyor belt 18 and a drive motor 19. The conveying track 18 is wrapped on the tensioning wheel 16 and the driving wheel 17, the driving wheel 17 is connected with the driving motor 19, the conveying track 18 is provided with an anti-material jumping component, and the discharge port 5 is connected with A material guide plate 6 with an elliptical cross section, a packaging bag clamping frame 7 is arranged on the outer wall of the material guiding plate 6, and a weighing sensor 8 is arranged on the packaging bag clamping frame 7, and the weighing sensor 8 and the The controller 3 is connected, and an air suction port 9 is provided on the inner wall of the material guide plate 6, and a suction fan 10 is connected to the air suction port 9, and the anti-material jumping component includes several item slots 81, and the item slots 81 are evenly arranged on the conveyor belt. On the outer surface of the crawler belt 18, the two adjacent item troughs 81 are connected by a buffer belt 82, the bottom or side wall of the item trough 81 is provided with a buffer sheet 83, and the outlet 15 of the feeding bin 2 is provided with a A solenoid valve 11, the solenoid valve 11 is connected with the controller 3, the frame 1 is provided with a dust collection box 13, the dust collection box 13 communicates with the suction port 9 through the communication channel 12, and the suction fan 10 is fixedly installed on the In the connection passage 12, a filter screen cover 14 is installed on the air suction port 9.

Working principle of the present invention: in the present invention, the material enters the feeding bin 1 from the feed port 3, and the controller 2 is used to issue instructions to control the opening and closing of the solenoid valve 11 to the outlet 15 of the feeding bin 2. When the outlet 15 is opened When the material falls on the conveyor belt 18, the drive motor 19 rotates the drive wheel 17, thereby realizing the rotation of the conveyor belt 18. By controlling the speed of the drive motor 19, the feeding speed can be flexibly adjusted, and the anti-material on the conveyor belt 18 The jumping component can prevent the items from falling into the item slot 81 and cause jumping or rolling, etc., to ensure the smooth progress of the subsequent material weighing work. By connecting the material guide plate 6 on the discharge port 5 of the feeding bin 2, due to the material guide The cross-section of the plate 6 is oval, which is convenient for docking with the opening of the packaging bag. The outer wall of the material guide plate 6 is provided with a packaging bag clamping frame 7. The packaging bag clamping frame 7 is used to fix the packaging bag. 7 is equipped with a load cell 8, which directly gives the weight of the packaging bag through the control 3, eliminating the weighing hopper of traditional equipment, even if the material enters the packaging bag from the outlet 5 of the feeding bin 2 Dust will not affect the weighing accuracy, which simplifies the mechanical structure and improves the weighing accuracy. By setting the suction port 9 on the material guide plate 6 and powered by the suction fan 10, the dust is sucked from the suction port 9. The dust is finally collected into the dust collection box 13 through the connecting channel 12, and the dust generated by it is effectively removed for the recycling of resources. Compared with the prior art, the present invention has simple and compact structure, high weighing accuracy and fast speed. Less dust, stable and reliable operation.

The above-mentioned embodiment is an illustration of the present invention, not a limitation of the present invention, and any scheme after simple transformation of the present invention belongs to the protection scope of the present invention.

Claims (4)

1. a high-precision weighing device, it is characterized in that: comprise frame (1), feeding bin (2) and controller (3), described feeding bin (2) and controller (3) are fixed in frame (1), feeding bin (2) is provided with inlet point (4) and discharging opening (5), outlet (15) is provided with in feeding bin (2), the below of described outlet (15) is provided with track conveyor structure, described track conveyor structure comprises tension wheel (16), drive wheel (17), conveying crawler belt (18) and CD-ROM drive motor (19), described conveying crawler belt (18) is wrapped on tension wheel (16) and drive wheel (17), drive wheel (17) is connected with CD-ROM drive motor (19), described conveying crawler belt (18) is provided with anti-material runout component, described discharging opening (5) being connected with cross-sectional plane is oval stock guide (6), the outer wall of described stock guide (6) is provided with packaging bag clamping support (7), packaging bag clamping support (7) is provided with LOAD CELLS (8), described LOAD CELLS (8) is connected with controller (3), the inwall of stock guide (6) offers inlet scoop (9), described inlet scoop (9) is connected with induced draft fan (10), anti-material runout component comprises several article grooves (81), and the bottom of described article groove (81) or sidewall are provided with buffer substrate tablet (83), described inlet scoop (9) is provided with filtering screen (14).

2. a kind of high-precision weighing device as claimed in claim 1, it is characterized in that: described article groove (81) is evenly arranged on the outside face of conveying crawler belt (18), and adjacent two described article grooves (81) connect through buffer strip (82).

3. a kind of high-precision weighing device as claimed in claim 1, it is characterized in that: the outlet (15) of described feeding bin (2) is provided with electromagnetic valve (11), and described electromagnetic valve (11) is connected with controller (3).

4. a kind of high-precision weighing device as claimed in claim 1, it is characterized in that: described frame (1) is provided with dust collecting box (13), described dust collecting box (13) is communicated with through communicating passage (12) with inlet scoop (9), and induced draft fan (10) is fixedly mounted in interface channel (12).