CN113859604A

CN113859604A - Quantitative filling system and filling method thereof

Info

Publication number: CN113859604A
Application number: CN202111331152.6A
Authority: CN
Inventors: 张伟
Original assignee: Jiangsu Toms Intelligent Equipment Co ltd
Current assignee: Jiangsu Toms Intelligent Equipment Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2021-12-31

Abstract

The invention discloses a quantitative filling system and a filling method thereof, and belongs to the field of automatic packaging. Comprises a material box, a blanking assembly and a pressure assembly. The feed box is a closed cavity and is suitable for containing feed liquid; the plurality of blanking assemblies are arranged at the bottom of the material box; the pressure assembly comprises an air source, an air path for communicating the air source with the material box, a pressure release valve arranged on the material box and communicated with the air path, and a pressure stabilizing sensor assembled inside the material box. The pressure in the material box is controlled to be stable through the pressure assembly, so that the flow rate of each filling head is consistent, and the filling precision reaches the standard. When needs are aerifyd, the manometer can provide the signal and provide atmospheric pressure for the pressure source, after jar internal pressure reached standard, stops the gassing to there is the manometer control, the pressure that adds more can automatic discharge, guarantees its stability, makes the filling precision high.

Description

Quantitative filling system and filling method thereof

Technical Field

The invention belongs to the field of automatic packaging, and particularly relates to a quantitative filling system and a filling method thereof.

Background

At present, the production of a packaging line tends to be more and more automatic, the market competition is strong, the importance of the quality of products is self-evident, the dosage of liquid filling is also one of the most important indexes, and the filling is particularly carried out on materials with higher temperature and higher viscosity.

When the daily packaging company produces products, materials with different characteristics are filled by using a filling system of the same machine, due to defects of the filling system, such as the machines filled by weighing, the weight of packing materials is deviated, the weight caused by liquid flowing into a bottle in the filling process jumps to the materials in the air, factors such as the reaction time and the precision grade of a weighing sensor cause the deviation of the filled materials and the actual preset weight, and a plurality of uncontrollable factors exist, and the periodic dosage problem is caused by the actual error in a cylinder and the accumulated error caused by long-term work when the piston mode is adopted for material beating,

disclosure of Invention

In order to overcome the technical defects, the invention provides a quantitative filling system and a filling method thereof, which aim to solve the problems related to the background art.

The invention provides a quantitative filling system and a filling method thereof, wherein the filling method comprises the following steps:

the feed box is a closed cavity and is suitable for containing feed liquid;

the blanking assemblies are arranged at the bottom of the material box;

the pressure assembly comprises an air source, an air passage for communicating the air source with the material box, a pressure release valve arranged on the material box and communicated with the air passage, and a pressure stabilizing sensor assembled in the material box;

when the pressure in the material box is greater than a preset value, the pressure relief valve relieves the pressure until the pressure in the material box is equal to the preset pressure; when the pressure in the material box is smaller than or equal to a preset value, the pressure stabilizing sensor monitors the pressure in the material box, transmits a signal to the gas source, and controls the input of the gas source so as to stabilize the pressure in the material box.

Preferably or optionally, the blanking nozzle comprises: the mass flow meter is vertically arranged at the bottom of the material box, and the discharging nozzle is connected with the mass flow meter and adopts an inner blocking type cylinder to stretch metal sealing mode.

Preferably or optionally, the blanking nozzle comprises: the device comprises a vertically installed blanking pipe, a nozzle arranged at the bottom of the blanking pipe, a pushing piece arranged in the blanking pipe and suitable for pushing a material liquid to move downwards, and a connecting pipeline used for connecting the blanking pipe and the mass flow meter.

Preferably or optionally, the mass flow meter and the material box, the mass flow meter and the connecting pipeline, and the connecting pipeline and the blanking pipe are connected by adopting metal sealing;

the metal seal includes: the device comprises a first pipeline connecting part, a second pipeline connecting part, a metal sealing sheet and a clamp; the metal sealing sheet is annular and is arranged between the first pipeline connecting part and the second pipeline connecting part; the clamp sets up the outside of first pipeline connecting portion and second pipeline connecting portion to improve the laminating degree between first pipeline connecting portion, second pipeline connecting portion and the metal sealing piece.

Preferably or optionally, the top of the bin is provided with a feed inlet.

Preferably or optionally, the gas circuit is connected with a gas storage tank, a plurality of air filters and a pressure regulating valve in series from a gas source end to a material box end.

Preferably or optionally, the top inside the tank is equipped with three level controllers of high, medium and low, adapted to detect the level of the feed liquid.

Preferably or optionally, a plurality of nozzles for automatic cleaning are provided at the top of the magazine.

The invention also provides a filling method based on the quantitative filling system, which comprises the following steps:

the gas path is filtered by a plurality of air filters to obtain pure compressed air, and the pure compressed air is added into the material box after passing through the pressure release valve;

presetting the pressure relief preset value of the pressure relief valve according to the viscosity of the feed liquid; when the pressure in the material box is greater than a preset value, the pressure relief valve relieves the pressure until the pressure in the material box is equal to the preset pressure;

when the pressure in the feed box is smaller than or equal to a preset value, feed liquid enters the feed box through the feed inlet in a sealed mode, and meanwhile the upper limit and the lower limit are controlled through the high liquid level and the low liquid level of the liquid level controller;

meanwhile, the pressure stabilizing sensor monitors the pressure in the material box, transmits a signal to the air source and controls the input of the air source so as to stabilize the pressure in the material box.

The invention relates to a quantitative filling system and a filling method thereof, compared with the prior art, the quantitative filling system has the following beneficial effects:

1. the pressure in the material box is controlled to be stable through the pressure assembly, so that the flow rate of each filling head is ensured to be consistent, and the filling precision reaches the standard. When needs are aerifyd, the manometer can provide the signal and provide atmospheric pressure for the pressure source, after jar internal pressure reached standard, stops the gassing to there is the manometer control, the pressure that adds more can automatic discharge, guarantees its stability, makes the filling precision high.

2. Vertical type is selected for the mounting mode of the mass flow meter to ensure that the passing feed liquid is fully filled in the flow meter, so that the flow meter can accurately calculate the passing flow, double dosage protection can be performed, and the filling precision is further improved.

3. The design with the unloading mouth is the tensile metal seal form of interior stifled formula cylinder, and the unloading mouth of this kind of form is small and exquisite slim and graceful, convenient to detach, and the cylinder adopts the quick cylinder of import to can send the instruction rapidly when guaranteeing to reach the filling dosage and realize opening and closing, because the frequency of filling is higher in the normal work.

4. The blanking nozzle is connected by adopting a through-body quick-assembly metal seal, and a material contact part is not provided with a threaded connection, so that a sanitary dead angle is avoided, the sealing in the prior art by adopting plastic cement, a sealing ring and the like is avoided, and the phenomenon of dripping and leaking caused by long service time can be avoided; in addition, the front end of the plug is in a concave sharp angle type, and materials can be cut off quickly after filling when the materials with high viscosity are encountered, so that the phenomena of wire drawing, inaccurate dosage, package material pollution and the like are avoided.

5. The air storage tank, the air filters and the pressure regulating valve are arranged on the air path; the air storage tank and the pressure regulating valve can play a role in stabilizing pressure, and compressed air is filtered by the air filters, so that the pollution of materials is avoided.

6. A high level detection switch, a middle level detection switch and a low level detection switch are arranged above the material box, and when the material is lower than the liquid level of the low level switch, the material is fed through the feeding hole and is fed smoothly in time; in addition, the pressure in the material box is greatly influenced by the height of the liquid level, and the pressure change in the material box is reasonably adjusted by measuring the liquid level change.

7. The automatic cleaning system is arranged above the material box, so that the automatic cleaning of the filling system is realized, the online cleaning function is realized, the online production change is realized, and the working efficiency is improved.

In conclusion, the self-flowing filling machine has the advantages that the self-flowing filling mode is adopted, the material is fed from the upper end and directly enters the packing material, the stability of the material liquid passing through the self-flowing filling machine is guaranteed through the flow meter, the dosage problem caused by other filling modes is solved, the structure is simple, the application range is wide (the self-flowing filling machine can be used for viscous, diluted and other materials), the cleaning is convenient, the sanitation grade is high, and the safety and the reliability are realized.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Figure 2 is a schematic view of the structure of the bin of the invention.

Fig. 3 is a schematic view of the structure of the blanking nozzle of the present invention.

Fig. 4 is a schematic cross-sectional view of a feed nozzle of the present invention.

Fig. 5 is a partially enlarged view of the metal seal structure of the present invention.

The reference signs are: a material box 110, a material inlet 120 and a liquid level controller 130;

the device comprises a blanking assembly 200, a mass flowmeter 210, a blanking nozzle 220, a blanking pipe 221, a nozzle 222, a pushing piece 223, a cylinder 223a, a pull rod 223b, a plug 223c, a connecting pipeline 230, a mounting groove 240, a first pipeline connecting part 250, a second pipeline connecting part 260, a metal sealing sheet 270, a limiting protrusion 271 and a clamp 280;

the device comprises a pressure component 300, an air source 310, an air path 320, a pressure relief valve 330, an air storage tank 340, an air filter 350, a pressure regulating valve 360 and a sewage outlet 370;

and a showerhead 400.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

Referring to fig. 1 to 2, a quantitative filling system and a filling method thereof include: a bin 110, a blanking assembly 200, a pressure assembly 300, and an automatic cleaning system.

The tank 110 is a closed cavity, in this embodiment, the tank 110 is a capsule type sealed tank 110, and the tank 110 is a pressure container tank 110 capable of bearing 3kg of pressure and suitable for containing feed liquid. Of course, the bin 110 may have other shapes as well, as will be apparent to those skilled in the art. The top of the material box 110 is provided with a feeding hole 120, so that automatic feeding is realized. The top of the tank 110 is equipped with three level controllers 130, high, medium and low, adapted to detect the level of the feed liquid. When the automatic feeding device works, the three liquid level detection switches including a high liquid level detection switch, a medium liquid level detection switch and a low liquid level detection switch are arranged above the tank, when the materials are lower than the liquid level of the low level switch, the materials are fed through the feeding hole 120, the pressure release valve 330 is opened simultaneously, the pressure in the tank is ensured to be consistent with the external atmospheric pressure, the feeding is ensured to be smooth, when the liquid level reaches the high liquid level, the material level switch gives a signal source to stop feeding for the client pump, and when the materials with good flowability are normally filled, the materials can automatically flow down through the height pressure of the liquid level.

A plurality of blanking assemblies 200 are arranged at the bottom of the feed box 110; referring to fig. 3 to 4, the blanking assembly 200 includes: the mass flow meter 210 is vertically arranged at the bottom of the feed box 110, and the discharging nozzle 220 is connected with the mass flow meter 210 and adopts an internal blocking type cylinder 223a to stretch a metal sealing mode. Wherein, choose vertical with mass flow meter 210's mounting means for use to guarantee that the feed liquid that passes through fills in the flowmeter fully, thereby guarantee that the flowmeter can be accurate calculate how much the flow that passes through, further improve the filling precision.

The discharging nozzle 220 includes: the mass flowmeter comprises a vertically-installed blanking pipe 221, a nozzle 222 arranged at the bottom of the blanking pipe 221, a pushing piece 223 arranged in the blanking pipe 221 and suitable for pushing the blanking liquid to move downwards, and a connecting pipeline 230 for connecting the blanking pipe 221 and the mass flowmeter 210. The pushing piece 223 can be a pull rod 223b and a plug 223c driven by a cylinder 223a, the blanking nozzle 220 is designed to be an inner blocking type cylinder 223a stretching metal sealing mode, the blanking nozzle 220 in the mode is small and light, and is convenient to detach, the cylinder 223a is an inlet quick cylinder 223a to ensure that an instruction can be rapidly sent to realize opening and closing when the filling dosage is reached, and parts with high use frequency, such as the pull rod 223b and the plug 223c in the blanking nozzle 220, are made of 316Ti materials due to the fact that the filling frequency is high in normal work, and have good corrosion resistance and good welding performance to ensure that the parts cannot be deformed and damaged during work.

The mass flowmeter 210 and the material box 110, the mass flowmeter 210 and the connecting pipe 230, and the connecting pipe 230 and the blanking pipe 221 are all connected by metal sealing. Referring to fig. 3, taking the space between the connecting pipe 230 and the blanking pipe 221 as an example, referring to fig. 5, the metal seal includes: a connection pipe, a mounting groove 240, a first pipe connection part 250, a second pipe connection part 260, a metal sealing piece 270, and a clip 280; a circumferential installation groove 240 is formed in the upper end face of the first pipeline connecting portion 250, the installation groove 240 is adapted to the shape and size of a connecting pipe, and the connecting pipe is inserted into the first pipeline to form a whole. Then, an annular metal sealing sheet 270 is arranged between the first pipeline connecting part 250 and the second pipeline connecting part 260, annular limiting protrusions 271 are arranged on two sides of the metal sealing sheet 270, and the limiting protrusions 271 are respectively clamped in the first pipeline connecting part 250 and the second pipeline connecting part 260; first pipe connection 250 and second pipe connection combination form an annular protruding, and clamp 280 sets up first pipe connection 250 and second pipe connection 260's outside, clamp 280's cross-section is "U" shape, and both sides face outwards inclines for both sides face offsets with first pipe connection 250 and second pipe connection 260 respectively, and through the elasticity of adjusting clamp 280, the laminating degree between first pipe connection 250, second pipe connection 260 and metal sealing piece 270 can be improved. Because the blanking nozzle 220 is connected by adopting the through-body quick-assembly metal seal, the material contact part is not provided with a threaded connection, thereby avoiding the sanitary dead angle, avoiding the sealing by adopting the plastic cement, the sealing ring and other forms in the past and avoiding the leakage phenomenon caused by long service time; in addition, the front end of the plug 223c is in a concave sharp angle type, and when materials with high viscosity are encountered, the materials can be cut off quickly after filling is finished, so that the phenomena of wire drawing, inaccurate dosage, package material pollution and the like are avoided.

When materials with high viscosity are encountered, the materials can be stirred or beaten by a piston, but the mode is complicated, the cleaning is complex and dead angles are easy to occur. The pressure assembly 300 is disposed on the material box 110 in this embodiment, and the material box 110 is properly compressed to achieve smooth filling.

The pressure assembly 300 comprises an air source 310, an air path 320 for communicating the air source 310 with the material box 110, a pressure relief valve 330 arranged on the material box 110 and communicated with the air path 320, and a pressure stabilizing sensor assembled inside the material box 110; when the pressure in the material tank 110 is greater than a preset value, the pressure relief valve 330 relieves the pressure until the pressure in the material tank is equal to the preset pressure; when the pressure in the material box 110 is less than or equal to a preset value, the pressure stabilizing sensor monitors the pressure in the material box 110, transmits a signal to the gas source 310, and controls the input of the gas source 310 to stabilize the pressure in the material box 110; and after the pressure in the tank reaches the standard, stopping filling gas, and controlling by a pressure stabilizer, the pressure which is added can be automatically discharged, so that the stability of the tank is ensured, and the filling precision is high.

The gas path 320 is connected in series with a gas storage tank 340, a plurality of air filters 350 and a pressure regulating valve 360 in sequence from the end of the gas source 310 to the end of the material box 110. The air storage tank 340 and the pressure regulating valve 360 can play a role in stabilizing pressure, compressed air can firstly enter the air storage tank 340 to meet the air quantity required by equipment so as to avoid the phenomenon of air shortage, safety measures such as a pressure gauge and a safety valve are matched on the air storage tank 340, and sewage outlets 370 are arranged at the bottoms of the air filter 350 and the air storage tank 340 and used for removing dirt generated by purified air. After the air path 320 is filtered by two stages (0.45umm, 0.22um) of the air filter 350, the obtained pure compressed air enters the material box 110 along with the pure compressed air passing through the pressure release valve 330, which ensures that the material is not polluted.

In a further embodiment, a plurality of spray heads 400 for automatic cleaning are arranged at the top of the material box 110, the spray heads 400 are connected with the clean water tank, after the filling operation is completed, the automatic cleaning of the filling system is realized, the online cleaning function is realized, the online product changing is realized, and the working efficiency is improved.

In order to facilitate understanding of the technical scheme of the quantitative filling system and the filling method thereof, the working principle of the quantitative filling system is briefly explained: the compressed air firstly enters the air storage tank 340, then is filtered by two stages (0.45umm, 0.22um) of the air filter 350, and the obtained pure compressed air enters the box 110 along with the pure compressed air after passing through the pressure release valve 330, so that the pollution of the materials is avoided. At this time, the pressure relief valve 330 is provided with adjustable scales, so that the pressure entering the charging bucket can be controlled, when the feed liquid is viscous, the numerical value of the pressure can be increased, the maximum pressure cannot exceed 0.3MPa, and after the preset pressure is exceeded, a spring in the pressure relief valve 330 is jacked open to relieve the pressure until the pressure in the charging bucket is leveled to the preset pressure; during normal work, feed liquid is in the middle of the feed tank from the inlet pipe feeding, and the height liquid level of three liquid level controller 130 is used for controlling spacing from top to bottom, and when the feed liquid is increasing, the in-process that reduces, the pressure in the feed tank also changes, and at this moment, be furnished with pressure stabilizing sensor on the feed tank and monitor its internal pressure to can be given air supply 310 by its conducted signal, control air supply 310's input, in order to reach stable air supply 310 pressure in the jar, one set of stable pressure system just so is complete. Under the action of pressure, the feed liquid basically keeps a high flow rate, is uniformly and stably filled in the mass flow meter 210, is subjected to double dosage protection through the mass flow meter 210, further controls the dosage of the feed liquid, and directly enters the packing material from the upper end through the feeding nozzle 220 to finish the filling process.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

Claims

1. A quantitative filling system, comprising:

the feed box is a closed cavity and is suitable for containing feed liquid;

the blanking assemblies are arranged at the bottom of the material box;

2. The metered dose filling system of claim 1, wherein said blanking assembly comprises: the mass flow meter is vertically arranged at the bottom of the material box, and the discharging nozzle is connected with the mass flow meter and adopts an inner blocking type cylinder to stretch metal sealing mode.

3. The metered dose filling system of claim 2, wherein said discharge nozzle comprises: the device comprises a vertically installed blanking pipe, a nozzle arranged at the bottom of the blanking pipe, a pushing piece arranged in the blanking pipe and suitable for pushing a material liquid to move downwards, and a connecting pipeline used for connecting the blanking pipe and the mass flow meter.

4. The quantitative filling system according to claim 3, wherein the mass flow meter and the material box, the mass flow meter and the connecting pipeline, and the connecting pipeline and the blanking pipe are connected by metal sealing;

5. The metered dose filling system of claim 1, wherein said top of said hopper is provided with a feed port.

6. The quantitative filling system according to claim 1, wherein the gas circuit is connected in series with a gas storage tank, a plurality of air filters and a pressure regulating valve in sequence from a gas source end to a material box end.

7. The quantitative filling system according to claim 1, wherein the top inside the tank is equipped with three level controllers of high, medium and low, adapted to detect the level of the feed liquid.

8. The metered dose filling system of claim 1, wherein a plurality of self-cleaning nozzles are provided at the top of said hopper.

9. A filling method based on the quantitative filling system according to any one of claims 1 to 8, wherein the method comprises: