CN102409497B - Dyeing assistant automatic weighting delivery system and method - Google Patents

Abstract

The invention mainly discloses an automatic weighing and distribution system for dyeing auxiliaries and a method thereof. Corresponding pipeline configuration. In the present invention, the automatic weighing, stirring and conveying functions of multiple different types of dyeing auxiliaries can be realized at the same time, and the recording of production data, the display of alarm information and the communication with the enterprise production process control system and enterprise information system can be realized. integrated. The system of the invention has the advantages of simple structure, convenient operation, accurate measurement and high working efficiency.

Description

An automatic weighing and distribution system and method for dyeing auxiliaries

technical field

The invention relates to the technical field of automatic control of textile printing and dyeing, in particular to an automatic weighing and delivery system for dyeing auxiliaries.

Background technique

At present, small and medium-sized printing and dyeing enterprises in my country have a low degree of automation in the field of dyeing auxiliaries weighing and distribution. Most printing and dyeing enterprises use manual weighing to complete the weighing of auxiliaries, and the transportation is also completed by manual handling. The disadvantages of this kind of manual weighing and transportation can be summarized as follows: First, cost control is difficult, mainly in the cost of defective products, the cost of rework, the cost of weighing and transportation waste, the storage cost of material consumption cannot be grasped in real time, and the labor is more and the increase of labor cost; secondly, the product quality control is poor, because the process control of the ratio is not strict, the detection amplitude of the concentration of the dye solution and the mercerizing solution fluctuates greatly, and the metering and transportation cannot be accurately controlled, resulting in variable prescriptions and unstable processes, which will inevitably affect Product quality; the third is that the efficiency is obviously low. Under manual conditions, the operation efficiency of the same prescription materials used repeatedly is low, and the standby time is long. Fourth, the management level cannot be fundamentally improved. Due to the large subjective factors, manual operation is easy to cause low reliability and high labor intensity. When the labor force is relatively tight, employee satisfaction is low. And so on a series of questions. Therefore, it is necessary to develop an additive weighing and conveying system with a high degree of automation, high precision and easy integration to provide services for printing and dyeing enterprises to improve production efficiency and product quality, and this case arose from this.

Contents of the invention

The main purpose of the present invention is to provide an automatic weighing and distribution system for dyeing auxiliaries, which has the functions of automatic weighing, automatic stirring and automatic delivery of multiple different types of auxiliaries, and realizes the automation of auxiliaries distribution. Accurate and greatly improve work efficiency.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

An automatic weighing and distribution system for dyeing auxiliaries, including several air-controlled valves, stirring and conveying motors, storage tanks, liquid level switches, PLC control systems, multiple mass flow meters and corresponding pipelines; the mass flow rate in the storage tanks The meter introduces the additives stored in the additive tank and tap water, and mixes them in the storage tank. All mass flow meters are connected to the air control valves to measure the quality of the delivery additives respectively; the storage tank is connected to the conveying motor to mix The liquid is transported to each auxiliary storage tank through the delivery pipeline, and at the same time, the outlet of the delivery motor flows back into the storage tank through the circulation branch to mix the additives. The circulation air control valve is installed on the circulation branch, and the storage tank is connected to discharge the residue The liquid discharge air control valve; the main air control valve is installed at the inlet of the conveying pipeline, after which the main air control valve is divided into several feeding branches and connected to each auxiliary agent liquid storage tank, and an air control valve is installed on each feeding branch The flow rate is controlled, and the air control valve is connected in series with each other through a three-way joint to reduce the length of the main feeding pipe and reduce the amount of residual liquid in the main pipe; a compressed air inlet is connected between the main air control valve and the feeding branch. The air control valve is connected to the liquid discharge air control valve at the end of the delivery pipeline.

The electrical signal generated by the mass flowmeter is conditioned and then sent to the PLC control system. The PLC control system converts the collected electrical signal into an appropriate weight value of the auxiliary agent, and transfers the corresponding weight value of the auxiliary agent in the Real-time display in the parameter display module.

The PLC control system has a parameter setting module, through which the weight of each auxiliary agent and the corresponding water weight required for dosing can be set according to the requirements of the auxiliary agent storage tank.

The PLC control system also has an operation control module, through which the weighing and conveying process can be started and terminated, and the action of each air control valve in the system can also be independently controlled.

The outlet of the air control valve connected with tap water is connected with the thread provided on the side wall of the storage tank through the pipeline, so as to ensure that the tap water slides down along the inner wall of the storage tank when the tap water enters the storage tank.

A method for automatic weighing and distribution of dyeing auxiliaries. In the first step, according to the requirements of the auxiliaries storage tank, the weight of each auxiliaries and the corresponding water weight required for liquid preparation are set, and the PLC control system first opens the introduction. The air control valve of tap water, after adding a certain amount of water into the storage tank, is controlled by the PLC control system and simultaneously opens the air control valve of the mass flow meter of the corresponding additive tank to replenish the storage tank; the second step, when each additive After adding water and water, the PLC control system controls to close the air control valve in the first step; the PLC control system controls to open the circulation air control valve on the circulation branch road and start the conveying motor to distribute the liquid in the storage tank. Carry out circulating stirring; the third step, after stirring for a period of time, the PLC control system controls to open the main air control valve on the delivery pipeline, and the air control valve corresponding to the auxiliary agent liquid storage tank, and close the circulating air control valve to carry out Conveying; the fourth step, when the storage tank is at a low liquid level, the PLC control system opens the air control valve connected to the tap water accordingly to clean the storage tank, and transports the residual liquid. The amount of water added at this time is the ratio The required total amount is subtracted from the amount added in the first step; in the fifth step, after the delivery is completed, the PLC control system controls to stop the delivery motor, and opens the air control valve connected to the external compressed air to press the residual liquid in the delivery pipeline into the auxiliary liquid storage tank. bucket.

In the fourth step, a liquid level switch is installed in the storage tank, and a low liquid level switch signal is sent to the PLC control system for the liquid level in the storage tank.

A liquid level switch is installed in each of the additive barrels to monitor the liquid level. When each additive barrel is in a low liquid level state, the PLC control system controls the corresponding auxiliary agent feeding pump to operate, and the auxiliary agent barrel Refilling; a liquid level switch is also installed in the auxiliary agent mixing storage tank to monitor the liquid level. When each auxiliary liquid storage tank is in a low liquid level state, the PLC control system will The storage tank is weighed and then transported.

The PLC control system can also realize abnormal alarm, data statistics, system parameter setting and operation control module, and at the same time realize data sharing through network interconnection.

After adopting the above scheme, the present invention has many beneficial effects:

In the dyeing and finishing production line, the present invention can carry out automatic weighing, automatic stirring and automatic conveying functions for multiple different types of auxiliaries at the same time, and can realize the recording of production data, display of alarm information and communication with the production process control system and production information. system integration. The present invention provides a whole set of complete automation solutions by means of electromechanical combination. The whole set of systems has simple structure, convenient operation, accurate measurement, reduces labor intensity of workers, and greatly improves labor efficiency. At the same time, due to the significant reduction in manual operation steps, people avoid direct contact with corrosive and irritating raw materials, and also improve the environment of the production workshop, bringing effective protection to the health of operating workers.

Description of drawings

Fig. 1 is the overall schematic diagram of a preferred embodiment of the present invention;

Fig. 2 is a schematic diagram of auxiliary agent feeding in a preferred embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in further detail in conjunction with the accompanying drawings.

The invention provides an automatic weighing and distributing system and method for dyeing auxiliaries, in particular, an automatic weighing and batching system for automatically weighing six kinds of dyeing auxiliaries and water, and automatically transporting 12 batching barrels.

Air control valve groups 1 to 25 in the whole system, stirring and conveying motor 26, material storage tank 27, liquid level switch 28, PLC control system 29, mass flow meters A to G, additive barrels A' to F', additive dispensing The liquid storage tanks 12' to 24', the auxiliary feeding pump groups A" to F" and corresponding pipelines are formed.

The PLC control system 29 includes parameter setting, real-time weight display and operation control modules, and the system can be started conveniently to complete the work automatically only by simple setting. In the present invention, the simultaneous weighing, stirring and conveying functions of multiple additives can be realized.

The outlets of mass flow meters A to G are respectively connected to the inlets of air control valves 1 to 7. The inlets of the flowmeters A to F are respectively connected to the auxiliary tanks A' to F' through pipelines, and the inlets of the flowmeter G are connected to the tap water supply pipes through pipelines. The outlets of the air control valves 1 to 6 are transported to the material storage tank 27 through pipelines, and the pipelines are suspended in the material storage tank 27. The outlet of the air control valve 7 is connected to the screw thread provided on the side wall of the storage tank 27 through the pipeline, so as to ensure that tap water enters the storage tank and slides down along the storage tank inwall.

There is a through hole on the side of the storage tank 27, which is connected with the outlet of the circulating air control valve 10 through the pipeline, and a through hole is opened at the bottom of the storage tank 27, and the inlet of the liquid discharge air control valve 9 and the conveying motor are opened through the pipeline. 26 inlets are connected, and the circulation air control valve 10 and the delivery motor 26 form a circulation branch 30. The outlet of the liquid discharge air control valve 9 is connected to the waste liquid discharge tank of the workshop through a pipeline.

The output port of the conveying motor 26 is connected with the inlet of the main air control valve 11 on the conveying pipeline 31 . The air control valve 8 is connected between the main air control valve 11 and the feeding branch 32, and the inlet is connected with a compressed air source. There are 12 feeding branches 32 in total, which are respectively connected to 12 auxiliary agent liquid storage barrels 12' to 24'. Air control valves 12 to 24 are installed on the feeding branch 32, and the inlets of the air control valves 12 to 24 are connected in series with each other in twos through a three-way joint, and the outlet of the last air control valve 24 drains the liquid of the air control valve 25. The inlets are connected, and the outlet of the liquid discharge air control valve 25 is connected to the workshop waste liquid discharge tank through a pipeline. The outlets of the air control valves 12 to 24 are connected to the corresponding auxiliary agent liquid storage barrels 12' to 24'.

Before starting the system, it is firstly necessary to ensure that there is no leakage in the system, and then the air control valves 1 to 25 and the conveying motor 26 are independently controlled by the control module provided by the PLC control system 29 . After all components are in correct operation, observe the real-time weight display module provided by the PLC control system 29 to ensure that the mass flow meters A to G work normally.

After completing the inspection work, through the parameter setting module provided by the PLC control system 29, according to the requirements of the auxiliary agent liquid storage tanks 12' to 24', set the auxiliary agent and water content of each auxiliary agent barrel A' to F' These parameters will be stored in the PLC's power-down protection register until the next reset to overwrite. In addition, it is necessary to set the zero value of the mass flow meters A to G and various time parameters through the parameter setting module, such as cleaning and stirring time, compressed air delivery time of each liquid mixing storage tank, etc.

After completing the parameter setting work, through the operation control module provided by the PLC control system 29, the process of automatic weighing and delivery of dyeing auxiliaries can be started. The working process of the system is described as follows:

First, the system opens the liquid discharge air control valve 9 to empty the residual liquid in the material storage barrel 27, and keep it in a state of waiting for a request. When the PLC control system 29 detects that the liquid level switches in the auxiliary liquid storage tanks 12' to 24' are at a low position and sends out a liquid distribution request, the system will search the PLC memory according to the information of the corresponding liquid storage tanks, and read The pre-set additives A' to F' and the weight of water enter the weighing state.

During the weighing process, first close the liquid discharge air control valve 9, then open the air control valve 7 and add 80% of the set weight into the storage tank 27 to ensure the dilution of the additives and prevent direct contact between the additives, which may cause violent Chemical reaction, adding water at the same time is to prevent the mixing of various additives without dilution. Open each air control valve 1 to 6 at the same time again, add the required weight of additives into the storage tank, and complete the additives. weighing.

After the auxiliary agent is weighed, open the circulating air control valve 10 and start the conveying motor 26 to stir the liquid in the storage tank 27 . After the set stirring time is reached, open the main air control valve 11 and the air control valves 12 to 24 corresponding to the requested liquid dosing storage tanks, and deliver the dosing liquid to the corresponding auxiliary agent dosing storage tanks 12' to 24'. When the storage tank 27 is close to the low liquid level, open the air control valve 7 again, tap water slides in from the inner wall of the storage tank 27, completes the cleaning of the storage tank 27, and is transported by the conveying motor 26 to the corresponding auxiliary agent dosing Storage barrels 12' to 24', ensure that the front section of the delivery pipeline is a low-concentration dosing solution, and try to avoid residual additives in the delivery pipeline. The water required for cleaning is the remaining 20% of the set value. Of course, this ratio can be adjusted appropriately, and is not limited to what is mentioned in this embodiment.

When the total amount of water added reaches the set value, the air control valve 7 is closed. After conveying for a period of time, stop the conveying motor 26, close the air control valve 11, open the air control valve 8, and use compressed air to convey the remaining liquid in the conveying pipeline 31 to the corresponding auxiliary agent liquid storage tanks 12' to 24'. After the compressed air delivery time is up, close the air control valves 12 to 24 corresponding to the requested liquid mixing storage barrels, and open the liquid discharge air control valve 25 to empty the residual liquid in the pipe. After the emptying time is up, close the liquid discharge air control valve 25.

The entire weighing and conveying process can basically be carried out at the same time; when multiple liquid mixing storage tanks send out requests, the system will first respond to the auxiliary liquid mixing storage tank with a smaller number; when the PLC control system 29 detects When the liquid level switch in each auxiliary storage tank A' to F' is low, the system will give an audible and visual alarm and the status indication of the corresponding auxiliary storage tank, which can be started in the operation control module provided by the PLC control system. The corresponding auxiliary pumps A'' to F'' feed each auxiliary tank.

Every time the weighing and conveying process is completed, the PLC control system 29 will automatically record the actual weight of the added additives and make statistics. Statistical data can be used for management information systems. At the same time, the PLC control system can be interconnected via the network to realize data sharing.

The above-mentioned embodiments are only used to explain the inventive concept of the present invention, but not to limit the protection of the rights of the present invention. Any insubstantial changes made to the present invention by using this concept should fall within the scope of protection of the present invention.

Claims (9)

1. An automatic weighing and distribution system for dyeing auxiliaries, characterized in that it includes several air control valves, stirring and conveying motors, storage tanks, liquid level switches, PLC control systems, multiple mass flow meters and corresponding pipelines; The additives stored in the additive tank and tap water are introduced into the material tank through the mass flowmeter, and mixed in the material storage tank, in which all the mass flow meters are connected to the air control valve to measure the quality of the auxiliary agent delivered respectively; the material storage tank Connect the conveying motor to convey the mixed liquid to each auxiliary storage tank through the conveying pipeline. At the same time, the outlet of the conveying motor flows back into the storage tank through the circulation branch to mix the additives. The circulation air control valve is installed on the circulation branch, and the storage The material barrel is connected to the liquid discharge air control valve that discharges the residual liquid; the main air control valve is installed at the inlet of the conveying pipeline, and the main air control valve is divided into several feeding branches and connected to each auxiliary agent liquid storage tank An air control valve is installed on the road to control the flow, and the air control valves are connected in series with each other through three-way joints to reduce the length of the main feeding pipe and reduce the amount of residual liquid in the main pipe; it is connected between the main air control valve and the feeding branch An air-operated valve for introducing compressed air, and an air-operated valve for draining liquid is connected at the end of the delivery line. 2. A kind of automatic weighing and distribution system for dyeing auxiliaries as claimed in claim 1, characterized in that: the electrical signal generated by the mass flowmeter is conditioned and sent to the PLC control system, and the PLC control system will collect the The electrical signal is converted into the corresponding additive weight value, and the corresponding additive weight value is displayed in the parameter display module in real time. 3. A dyeing auxiliaries automatic weighing and distributing system as claimed in claim 1, characterized in that: said PLC control system has a parameter setting module, through which the requirements of said auxiliaries storage tank can be adjusted. , to set the weight of each additive and the corresponding water weight required for dosing. 4. A dyeing auxiliaries automatic weighing and distribution system as claimed in claim 1, characterized in that: said PLC control system also has an operation control module, through which the weighing and conveying process can be started and terminated, and also The action of each air control valve in the system can be controlled independently. 5. An automatic weighing and distribution system for dyeing auxiliaries as claimed in claim 1, characterized in that: the outlet of the air control valve connected to tap water is connected to the thread provided on the side wall of the storage tank through a pipeline to ensure that the tap water Slide down the inside of the tank when entering the tank. 6. A method for automatic weighing and distribution of dyeing auxiliaries, characterized in that: in the first step, according to the requirements of the auxiliaries storage tank, the weight of each auxiliaries and the corresponding water weight required for liquid preparation are set, controlled by PLC The system first opens the air control valve for introducing tap water, and after adding a certain amount of water into the storage tank, the PLC control system controls and simultaneously opens the air control valve of the mass flow meter of the corresponding additive tank to replenish the storage tank; the second step, After the additives and water are added, the PLC control system controls to close the air control valve in the first step; the PLC control system controls to open the circulation air control valve on the circulation branch road and start the conveying motor to distribute the liquid in the storage tank. Carry out circulating stirring; the third step, after stirring for a period of time, the PLC control system controls to open the main air control valve on the delivery pipeline, and the air control valve corresponding to the auxiliary agent liquid storage tank, and close the circulating air control valve to carry out Conveying; the fourth step, when the storage tank is at a low liquid level, the PLC control system opens the air control valve connected to the tap water accordingly to clean the storage tank, and transports the residual liquid. The amount of water added at this time is the ratio The required total amount is removed from the amount added in the first step; in the fifth step, after the delivery is completed, the PLC control system controls to stop the delivery motor, and the air control valve connected to the external compressed air is opened to press the residual liquid in the delivery pipeline into the auxiliary liquid storage material bucket. 7. A method for automatically weighing and distributing dyeing auxiliaries as claimed in claim 6, characterized in that: in the fourth step, a liquid level switch is installed in the storage tank to adjust the liquid level in the storage tank. Generate a low liquid level switch signal and send it to the PLC control system. 8. A method for automatically weighing and distributing dyeing auxiliaries as claimed in claim 6, characterized in that: liquid level switches are installed in the auxiliaries barrels to monitor the liquid level, and when each auxiliaries barrel is When the liquid level is low, the PLC control system controls the action of the corresponding auxiliary feeding pump to feed the auxiliary tank; a liquid level switch is also installed in the auxiliary liquid storage tank to monitor the liquid level. When the liquid level of each auxiliary agent mixing storage tank is low, the PLC control system weighs the auxiliary agent mixing liquid storage tank before transporting. 9. A method for automatically weighing and distributing dyeing auxiliaries as claimed in claim 6, characterized in that: said PLC control system can also realize abnormal alarm, data statistics, system parameter setting and operation control module, and at the same time, it can be interconnected via network , to achieve data sharing.

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