Automatic mixing control device for natural rubber latex and acid liquor
Through the automatic mixing control device, the 10:1 ratio automatic control of latex and acid is achieved by using solenoid valves and flowmeters, which solves the problem of uneven mixing caused by manual detection and improves the quality and production efficiency of rubber standard rubber.
Patent Information
- Application Number
- CN202421007301.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, the amount of acid added during the flow of natural rubber latex into the solidification tank depends on manual detection, resulting in uneven mixing ratios and low efficiency, which affects the quality of the rubber.
Design a natural rubber latex and acid liquid automatic mixing control device, and use solenoid valves, solenoid flowmeters, electric regulating valves and turbine flowmeters to realize automatic control of the mixing ratio between latex and acid liquid, and use real-time flow detection and regulating valve opening , ensure a 10:1 ratio mix.
It improves work efficiency, ensures the stable quality of rubber standard rubber, reduces labor costs, and realizes the automation of solidification process.
Smart Images
Figure CN222189756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to natural rubber standard rubber processing equipment, in particular to an automatic mixing control device for latex and acid liquid. Background Art
[0002] Natural rubber has good resilience, insulation, water barrier and plasticity. After proper processing, it also has oil resistance and acid resistance. Therefore, natural rubber products are used in a wide range of industries, from home appliances to airplanes and ships.
[0003] Latex refers to the raw material harvested from rubber trees. For easy preservation, an appropriate amount of ammonia is added to the latex to prevent it from coagulating. It is then sent to a natural rubber primary processing plant, where it undergoes coagulation, thinning, flaking, granulation, drying and other processes to finally be made into standard rubber as a raw material for rubber product processing companies. In the coagulation process, in order to coagulate the latex, the natural rubber primary processing plant prepares 1 / 10 of the amount of acid according to the ammonia content in the latex, so that the pH value of the latex and acid after mixing is stabilized at around 5.5, and then the acid and latex are strictly mixed in a 1:10 ratio and flow into the coagulation tank.
[0004] At present, the amount of acid added during the process of latex flowing into the coagulation tank is all based on manually detecting the pH value of natural rubber latex and then manually controlling the opening of the acid adding valve to make the mixing ratio of acid and latex 1:10. This is not only inefficient, but also the mixing of acid and latex is extremely uneven, resulting in unstable quality of the rubber after coagulation, which directly affects the processing quality of the standard rubber. To this end, a natural rubber latex and acid automatic mixing control device is designed, which can realize the automatic control of the mixing ratio of latex and acid, which can not only improve the work efficiency, but more importantly, ensure the quality of the natural rubber standard rubber. Summary of the invention
[0005] The utility model discloses a natural rubber latex and acid liquid automatic mixing control device, which can realize automatic control of the mixing ratio of the latex and the acid liquid, has simple operation and accurate ratio, and can effectively improve the quality of the natural rubber standard glue.
[0006] The technical solution adopted by the utility model is as follows: a latex pool and an acid pool are provided, a latex pipeline is connected below the latex pool, a solenoid valve is provided on the latex pipeline, and an electromagnetic flowmeter is provided at the rear of the solenoid valve. An acid pipeline is connected below the acid pool, an electric regulating valve is provided on the acid pipeline, and a turbine flowmeter is provided at the rear end of the electric regulating valve. A gel-acid mixing pool is provided at the end of the latex pipeline and the acid pipeline, a gel-acid mixing pipeline is provided behind the gel-acid mixing pool pipeline, and a pH value measuring probe and a pH value measuring instrument are provided at the end of the gel-acid mixing pipeline.
[0007] The control process of the automatic control device: when the latex needs to be coagulated, the power is turned on, the control system gives a signal to the solenoid valve, the solenoid valve opens, and the latex reaches the electromagnetic flowmeter through the latex pipeline. The electromagnetic flowmeter detects the flow of latex and generates an electrical signal, which is transmitted to the control system. The control system calculates the instantaneous flow of the latex through the electrical signal of the electromagnetic flowmeter. According to the process requirements, the instantaneous flow target value of the acid is calculated according to the ratio of latex to acid of 10:1, and compared with the actual value of the instantaneous flow of the acid measured by the turbine flowmeter. The valve opening is then adjusted through the actuator of the electric control valve. If the target value is greater than the actual value, the control system drives the actuator of the electric control valve to increase the valve opening of the electric control valve. If the target value is less than the actual value, the control system drives the actuator of the electric control valve to reduce the valve opening of the electric control valve. Since the total amount of latex and acid will continue to decrease during the discharge process, the liquid levels of latex and acid will drop. Different liquid level heights and pressures will lead to different flow rates. Therefore, it is necessary to adjust the valve opening of the electric control valve in real time according to the real-time flow rate of latex flowing through the electromagnetic flowmeter and the real-time flow rate of acid flowing through the turbine flowmeter to ensure that the instantaneous flow ratio of latex and acid is controlled at 10:1.
[0008] After latex and acid are mixed in the rubber-acid mixing tank, they flow into the coagulation tank through the rubber-acid mixing pipe. A pH measuring probe is provided at the end of the rubber-acid mixing pipe. The pH measuring probe displays the pH value of the rubber-acid mixture on the pH measuring instrument for easy manual observation.
[0009] When all the latex in the latex pool is discharged, and the latex flow signal measured by the electromagnetic flowmeter is less than the set minimum value, the control system sends a signal, the solenoid valve is powered off, the latex pipeline is closed, the electromagnetic flowmeter detection signal is zero, the target value is zero, and finally, the electric control valve is closed and the acid pipeline is closed.
[0010] The beneficial effect of the utility model is that the acid preparation operation in the natural rubber latex coagulation process is changed from manual operation to automatic control, thus realizing the automation of the latex coagulation acid preparation process, reducing labor costs, improving production efficiency and ensuring the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a working principle diagram of an embodiment of the utility model.
[0012] In the figure: 1. latex pool 2. acid pool 3. latex pipeline 4. solenoid valve 5. solenoid valve coil 6. electromagnetic flowmeter 7. excitation coil 8. iron core 9. electrode 10. acid pipeline 11. electric regulating valve 12. actuator 13. turbine flowmeter 14. magnetoelectric converter 15. electromagnetic coil 16. latex-acid mixing pool 17. latex-acid mixing pipeline 18. pH value meter 19. pH value measuring probe 20. coagulation tank. DETAILED DESCRIPTION
[0013] A latex pool (1) and an acid pool (2) are provided. A latex pipeline (3) is connected below the latex pool (1). A solenoid valve (4) is provided on the latex pipeline (3). An electromagnetic flowmeter (6) is provided at the rear of the solenoid valve (4). An acid pipeline (10) is connected below the acid pool (2). An electric regulating valve (11) is provided on the acid pipeline (10). A turbine flowmeter (13) is provided at the rear end of the electric regulating valve (11). A gel-acid mixing pool (16) is provided at the end of the latex pipeline (3) and the acid pipeline (10). A gel-acid mixing pipeline (17) is provided behind the gel-acid mixing pool pipeline (16). A pH value measuring probe (19) and a pH value measuring instrument (18) are provided at the end of the gel-acid mixing pipeline (17).
[0014] The control process of the automatic control device is as follows: when the latex needs to be coagulated, the power is turned on, the control system sends a signal to the electromagnetic valve (4), the electromagnetic valve (4) opens, and the latex reaches the electromagnetic flowmeter (6) through the latex pipeline (3). The electromagnetic flowmeter (6) detects the latex flowing through, generates an electrical signal, and transmits the electrical signal to the control system. The control system calculates the instantaneous flow rate of the latex through the electrical signal of the electromagnetic flowmeter (6). According to the process requirements, the instantaneous flow rate target value of the acid solution is calculated according to the ratio of latex to acid solution of 10:1, and the target value is compared with the actual value of the instantaneous flow rate of the acid solution measured by the turbine flowmeter (13). Then, the valve opening is adjusted by the actuator (12) of the electric control valve (11). If the target value is greater than the actual value, the control system drives the actuator (12) of the electric control valve (11) to increase the valve opening of the electric control valve (11). If the target value is less than the actual value, the control system drives the actuator (12) of the electric control valve (11) to reduce the valve opening of the electric control valve (11). Since the total amount of latex and acid will continue to decrease during the discharge process, the liquid levels of latex and acid will drop. Different liquid level heights and pressures will lead to different flow rates. Therefore, it is necessary to adjust the valve opening of the electric control valve (11) in real time according to the real-time flow rate of latex flowing through the electromagnetic flowmeter (6) and the real-time flow rate of acid flowing through the turbine flowmeter (13) to ensure that the instantaneous flow ratio of latex and acid is controlled at 10:1.
[0015] After the latex and the acid solution are mixed in the rubber-acid mixing tank (16), they flow into the coagulation tank (20) through the rubber-acid mixing pipe (17). A pH value measuring probe (19) is provided at the end of the rubber-acid mixing pipe (17). The pH value measuring probe (19) displays the pH value of the rubber-acid mixture measured on a pH value measuring instrument (18) for easy manual observation.
[0016] When all the latex in the latex pool has been drained out, and the latex flow signal measured by the electromagnetic flowmeter (6) is less than the set minimum value, the control system sends a signal, the solenoid valve (4) is powered off, the latex pipeline (3) is closed, the electromagnetic flowmeter (6) detects a signal of zero, the target value is zero, and finally, the electric control valve (11) is closed, and the acid pipeline (10) is closed.
Claims
1. A natural rubber latex and acid solution automatic mixing control device, characterized in that: A latex pool (1) and an acid pool (2) are provided. A latex pipeline (3) is connected below the latex pool (1). A solenoid valve (4) is provided on the latex pipeline (3). An electromagnetic flowmeter (6) is provided at the rear of the solenoid valve (4). An acid pipeline (10) is connected below the acid pool (2). An electric regulating valve (11) is provided on the acid pipeline (10). A turbine flowmeter (13) is provided at the rear end of the electric regulating valve (11). A latex-acid mixing pool (16) is provided at the end of the latex pipeline (3) and the acid pipeline (10). A latex-acid mixing pipeline (17) is provided behind the latex-acid mixing pool (16). A pH value measuring probe (19) and a pH value measuring instrument (18) are provided at the end of the latex-acid mixing pipeline (17).