Accurate corrosion rate control device based on hydraulic and sensing technology

Abstract

The invention discloses a precise corrosion rate control device based on a hydraulic and sensing technology, and the device comprises a corrosion structure which is used for accommodating a to-be-corroded workpiece, injecting two corrosive liquids into the to-be-corroded workpiece, monitoring the pressure of corrosive gas generated in the corrosion process, and transmitting the pressure to a control system in real time; the hydraulic propulsion system is used for providing power for propulsion of the two corrosive liquids in the corrosion structure and realizing propulsion conveying of the two corrosive liquids according to a set proportion by controlling the propulsion rate; and the control system is used for controlling the propelling rate and start-stop of the hydraulic propelling system according to the monitored pressure value and controlling the corrosion progress. The problems of storage and mixing of the corrosive liquid and control of the reaction process in a traditional corrosion process are solved, the corrosive liquid is effectively prevented from deteriorating in advance, the corrosion rate is accurately regulated and controlled, and the stability, accuracy and safety of the corrosion process are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of intelligent corrosion systems, in particular, a precise corrosion rate control device based on hydraulic and sensing technology. BACKGROUND

[0002] In many fields such as material processing, chemical production, and scientific research, corrosion technology is a crucial technical link. Traditional corrosion operations mainly rely on manual experience, and corrosion liquid is applied to the surface of the material to be processed by simple tools. This method has many serious drawbacks.

[0003] In terms of storage and use of corrosion liquid, multiple corrosion liquids are usually pre-mixed in a container. However, different corrosion liquid components often have different chemical activities, and they may undergo uncontrollable chemical reactions during storage. For example, some strong oxidizing and reducing corrosion liquids will rapidly undergo oxidation-reduction reactions after mixing, which not only changes the original chemical composition and concentration of the corrosion liquid, making it unable to achieve the expected corrosion effect, but also produces by-products such as precipitates and gases, causing the corrosion liquid to deteriorate and significantly reducing its service life. According to relevant industry statistics, about 30% of corrosion liquids have to be discarded before they can fully exert their effect due to premature deterioration, which undoubtedly increases the cost of raw materials and waste disposal for enterprises, and also causes unnecessary burden on the environment.

[0004] In terms of control of the corrosion reaction process, traditional methods are almost unable to achieve precise control. It is difficult for operators to accurately grasp the actual amount of corrosion liquid and reaction rate, which makes the corrosion effect extremely unstable. In the process of metal surface corrosion treatment, local over-corrosion may occur, resulting in damage to the material structure strength; in some fine material corrosion experiments, accurate experimental data may not be obtained due to insufficient corrosion. This uncertainty of corrosion effect seriously affects the consistency of product quality and the reliability of experimental results, causing great trouble to enterprise production and scientific research.

[0005] With the rapid development of industrial automation technology and intelligent control technology, and the increasing demand for corrosion process precision and efficiency in various industries, the limitations of traditional corrosion processes have become increasingly prominent. Therefore, it is of great practical significance and urgent market demand to develop a system that can effectively prevent corrosion liquid from deteriorating due to premature mixing and achieve precise and intelligent control of the corrosion reaction process. In addition, the traditional corrosion liquid supply method often lacks real-time monitoring and precise control of the corrosion process. This makes it difficult to control the mixing rate of corrosion liquid, affecting the corrosion effect and safety. In some cases, due to the lack of effective monitoring means, the gas concentration generated during the corrosion process may exceed the safety threshold, increasing the risk of industrial production. SUMMARY

[0006] The purpose of the present application is to provide a precise corrosion rate control device based on hydraulic and sensing technology, which effectively prevents the premature mixing and deterioration of the corrosion liquid by designing a double-injector independent liquid supply system and an intelligent feedback control mechanism, and accurately regulates the corrosion process according to the real-time monitored corrosion reaction gas concentration, thereby improving the stability, accuracy and efficiency of the corrosion process.

[0007] The technical solution for achieving the purpose of the present application is:

[0008] A precise corrosion rate control device based on hydraulic and sensing technology, comprising:

[0009] A corrosion structure for accommodating a workpiece to be corroded and injecting two kinds of corrosion liquid into the workpiece to be corroded, monitoring the pressure of the corrosion gas generated during the corrosion process, and transmitting the pressure to the control system in real time;

[0010] A hydraulic propulsion system for providing power for the propulsion of the two kinds of corrosion liquid in the corrosion structure, and achieving the propulsion and delivery of the two kinds of corrosion liquid at a set ratio by controlling the propulsion speed;

[0011] A control system for controlling the propulsion speed and start-stop of the hydraulic propulsion system according to the monitored pressure value, and controlling the corrosion progress.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] After adopting the present application, the mixing speed of the two solutions can be accurately controlled through the cooperation of the hydraulic injection system, the corrosion system and the control system, ensuring the efficiency of the corrosion process. The design of the system makes the use of corrosion liquid more efficient, reducing waste and saving cost. The double-injector design avoids the mixing of the two liquids before the reaction, thereby preventing the deterioration of the corrosion liquid and ensuring the quality and performance of the corrosion liquid. Through the cooperation of the control system and the gas concentration sensor, the corrosion process can be monitored and adjusted in real time, greatly improving the corrosion quality of the corrosion liquid. The hydraulic injection system can be combined with modern control technology to realize automatic and intelligent operation, reduce human errors and improve production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The overall structural arrangement of the present application is shown.

[0015] Figure 2 The hydraulic system principle diagram of the present application is shown. DETAILED DESCRIPTION

[0016] The present application will be further described below in conjunction with the drawings and specific embodiments.

[0017] In combination with Figure 1The application discloses a precise corrosion rate control device based on hydraulic and sensing technologies, which comprises a hydraulic propulsion system, a corrosion structure and a control system.

[0018] In combination Figure 2The hydraulic propulsion system mainly consists of a first oil tank 8, a second oil tank 10, a third oil tank 12, a hydraulic pump 9, a relief valve 11, a three-position four-way electromagnetic reversing valve 7, a first sequence valve 3, a second sequence valve 4, a first check valve 5, a second check valve 6, a first hydraulic cylinder 1, a second hydraulic cylinder 2, a first throttle valve 13 and a second throttle valve 14. The first check valve 5 and the second check valve 6 only allow hydraulic oil to flow from the rod cavity of the hydraulic cylinder 1, 2 to the return oil circuit, and prevent reverse flow. The suction port of the hydraulic pump 9 is communicated with the second oil tank 10 to suck hydraulic oil from the second oil tank 10. On the oil injection circuit, the relief valve 11 is connected in series, and the overflow end thereof is directly communicated with the third oil tank 12. The output end of the relief valve 11 is connected with the first throttle valve 13, which is used to control the flow of hydraulic oil. The first throttle valve 13 is connected with the three-position four-way electromagnetic reversing valve 7. The P port of the three-position four-way electromagnetic reversing valve 7 is connected with the output end of the hydraulic pump 9 through the oil injection circuit and the first throttle valve 13 to receive hydraulic oil from the second oil tank 10. The A port is directly communicated with the rodless cavity of the first hydraulic cylinder 1 through the first working oil circuit. The B port is directly communicated with the rodless cavity of the second hydraulic cylinder 2 through the second working oil circuit. The T port is communicated with the first oil tank 8 through the return oil circuit for system return. The rod cavity of the first hydraulic cylinder 1 is connected with the first sequence valve 3 and the first check valve 5 which are connected in parallel through the second throttle valve 14, and the return oil finally flows into the T port return oil circuit of the three-position four-way electromagnetic reversing valve 7. The rod cavity of the second hydraulic cylinder 2 is connected with the second sequence valve 4 and the second check valve 6 which are connected in parallel, and the return oil also finally flows into the T port return oil circuit of the three-position four-way electromagnetic reversing valve. The first hydraulic cylinder 1 and the second hydraulic cylinder 2 are internally provided with hydraulic piston rods, and the pistons are made of corrosion-resistant materials to prevent corrosion during operation. The second throttle valve 14 is arranged on the oil circuit of the first hydraulic cylinder 1, and the moving speed of the first hydraulic cylinder 1 can be controlled by adjusting the second throttle valve 14, so as to realize the delivery of different proportions of corrosive liquid with the second hydraulic cylinder 2. In the corrosive liquid injection pipeline 23, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are pushed at different speeds by adjusting the second throttle valve 14. The rodless cavity of the first hydraulic cylinder 1 receives pressure oil through the A port of the three-position four-way electromagnetic reversing valve 7 to push the piston forward. The rod cavity is connected with the parallel oil circuit of the first sequence valve 3 and the first check valve 5 through the first return oil circuit, and the return oil flows to the third oil tank 12 or the first oil tank 8. The rodless cavity of the second hydraulic cylinder 2 receives pressure oil through the B port of the three-position four-way electromagnetic reversing valve 7 to push the piston forward. The rod cavity is connected with the parallel oil circuit of the second sequence valve 4 and the second check valve 6 through the second return oil circuit, and the return oil flows to the third oil tank 12 or the first oil tank 8.

[0019] The corrosion structure comprises a first syringe 15, a second syringe 17, a first syringe container 16, a second syringe container 18, a first corrosion liquid injection port 19, a second corrosion liquid injection port 20, a first corrosion liquid addition port 21, a second corrosion liquid addition port 22, a corrosion liquid injection pipeline 23, a switch valve 24, a gas concentration sensor 25, a corrosion reaction cavity 26, an exhaust valve 27, a corrosion liquid outflow port 28, and a gas collection device 29. The first syringe container 16 and the second syringe container 18 are respectively connected to the first corrosion liquid addition port 21 and the second corrosion liquid addition port 22 at the top of the first syringe 15 and the second syringe 17 through the first corrosion liquid injection port 19 and the second corrosion liquid injection port 20. To ensure the sealing of the system during high-pressure propulsion, the first corrosion liquid injection port 19 and the second corrosion liquid injection port 20 on the first syringe container 16 and the second syringe container 18 are respectively provided with inner threads, and each injection port is sealed by a detachable threaded plug matched therewith. The corrosion liquid in the storage container can be conveniently added to the syringe. The outlets of the first syringe 15 and the second syringe 17 are connected to the corrosion reaction cavity 26 through the corrosion liquid injection pipeline 23, and the switch valve 24 is arranged on the pipeline to control the flow of the corrosion liquid. The gas concentration sensor 25 is installed inside the corrosion reaction cavity 26 to monitor the concentration of the gas generated by the corrosion reaction in real time. The exhaust valve 27 is installed at the top of the corrosion reaction cavity 26, and when the gas pressure inside the cavity reaches a set threshold, the exhaust valve 27 opens to discharge the gas to the gas collection device 29. The corrosion liquid outflow port 28 is arranged at the bottom of the corrosion reaction cavity 26 to discharge the reacted corrosion liquid. In the entire corrosion structure, the first syringe 15, the second syringe 17, the first syringe container 16, the second syringe container 18, the corrosion liquid injection pipeline 23, the switch valve 24, the corrosion reaction cavity 26, the exhaust valve 27, and the corrosion liquid outflow port 28 are all made of corrosion-resistant materials to ensure normal operation in a strong corrosion environment; the gas collection device 29 is specifically set according to the type of gas generated to realize safe collection and treatment.

[0020] The control system core is a host controller 30, which is respectively connected in communication with a three-position four-way electromagnetic reversing valve 7 in the hydraulic propulsion system and a gas concentration sensor 25 in the corrosion structure. The host controller 30 receives the real-time gas concentration signal sent by the gas concentration sensor 25, and sends control instructions to the three-position four-way electromagnetic reversing valve 7 according to a preset program, to realize accurate control of the working state of the hydraulic propulsion system, and thus regulate the corrosion process.

[0021] The gas generated by the corrosion reaction accumulates in the corrosion reaction chamber 26. When the gas pressure reaches the opening pressure threshold of the exhaust valve 27, the exhaust valve 27 opens, and the gas enters the gas collection device 29 through the exhaust passage. The exhaust valve 27 adopts a float type structure. When the gas pressure in the valve is greater than the system pressure, the gas will lower the liquid level in the chamber, and the float will open the exhaust port as the liquid level drops. When the gas pressure is lower than the system pressure, the float rises to close the exhaust port, thereby realizing automatic on-off control of the gas circuit and ensuring that the gas generated during the corrosion reaction process can be safely and effectively treated.

[0022] Preparation stage: First, unscrew the corresponding threaded plugs from the first syringe container 16 and the second syringe container 18. Different types of corrosion solution are added to the first syringe 15 and the second syringe 17 through the exposed first corrosion solution inlet 19 and the second corrosion solution inlet 20. After filling, screw the threaded plugs back into the corresponding inlets and tighten them to ensure that the containers are completely sealed. After confirming the seal, open the switch valve 24 while ensuring that the exhaust valve 27 is in the closed state. Then check the status of each component of the hydraulic propulsion system, including ensuring that the liquid level of the hydraulic oil in the first oil tank 8, the second oil tank 10, and the third oil tank 12 is normal, the oil quality is clean, the hydraulic pump 9 operates normally, the initial state of the overflow valve 11 is closed and the overflow pressure is set, the valve core position switching of the three-position four-way electromagnetic reversing valve 7 is normal, the opening pressure of the first sequence valve 3 and the second sequence valve 4 is set correctly, the one-way conduction performance of the first one-way valve 5 and the second one-way valve 6 is good, the piston rod of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 moves smoothly and seals well, and the first throttle valve 13 and the second throttle valve 14 are adjusted to the appropriate initial propulsion rate ratio.

[0023] Fast forward in the corrosion solution injection stage: start the hydraulic pump 9, at this time the overflow valve 11 is closed, the hydraulic oil is driven by the hydraulic pump 9, the hydraulic oil passes through the first throttle valve 13, and the three-position four-way electromagnetic reversing valve 7 is energized at 2YA. The hydraulic oil passes through the three-position four-way electromagnetic reversing valve 7, flows into the P port of the three-position four-way electromagnetic reversing valve 7, and then passes through the A port and the B port respectively, entering the rodless cavity of the first hydraulic cylinder 1 and the rodless cavity of the second hydraulic cylinder 2 respectively. And through the oil injection oil way respectively to the first sequence valve 3, the second sequence valve 4, at the same time the first hydraulic cylinder 1 has a rod cavity oil liquid to overcome the first sequence valve 3 pressure back to the third oil tank 12, the second hydraulic cylinder 2 has a rod cavity oil liquid to overcome the second sequence valve 4 pressure back to the third oil tank 12. At this time, due to the closing of the first one-way valve 5 and the second one-way valve 6, the hydraulic oil pushes the hydraulic piston rod in the first hydraulic cylinder 1 and the second hydraulic cylinder 2 to move forward, thereby respectively pushing the corrosion solution in the first syringe 15 and the second syringe 17 into the corrosion solution injection pipeline 23. Through the adjustment of the second throttle valve 14, the first syringe 15 and the second syringe 17 deliver the corrosion solution at the set ratio, and the mixed corrosion solution enters the corrosion reaction chamber 26 to start the corrosion of the workpiece.

[0024] The corrosion rate regulation stage: During the corrosion process of the workpiece, corrosion gas is generated, and the gas concentration sensor 25 monitors the gas concentration in the corrosion reaction cavity 26 in real time. When the gas concentration reaches the set first threshold value, the gas concentration sensor 25 inputs an analog signal to the host controller 30. After receiving the instruction, the host controller 30 sends a digital signal to the hydraulic propulsion system, and the overflow valve 11 is opened. Part of the hydraulic oil is diverted from the overflow valve 11 into the third oil tank 12, reducing the flow into the rodless cavity of the first hydraulic cylinder 1 and the second hydraulic cylinder 2. The pressure in the rodless cavity decreases, the piston advances at a slower rate, and the first syringe 15 and the second syringe 17 deliver the corrosion liquid at a slower speed. The oil in the rod cavity of the first hydraulic cylinder 1 flows into the first oil tank 8 through the first one-way valve 5, and the oil in the rod cavity of the second hydraulic cylinder 2 flows into the first oil tank 8 through the second one-way valve 6, ensuring smooth deceleration of the piston. At this time, the hydraulic system enters the work advancing stage, achieving precise control of the corrosion rate of the workpiece, and avoiding uneven corrosion or dangerous situations caused by excessive reaction speed.

[0025] The corrosion pause and resume stage: As the corrosion reaction continues, when the corrosion gas concentration rises to the maximum threshold value set by the gas concentration sensor 25, the gas concentration sensor 25 again inputs an analog signal to the host controller 30. After receiving the instruction, the host controller 30 inputs a digital signal to the hydraulic propulsion system, and the three-position four-way electromagnetic reversing valve 7 is energized in the middle position. The P port, A port, and B port of the three-position four-way electromagnetic reversing valve 7 are closed, and the T port is connected to the first oil tank 8. The oil in the rodless cavity of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 is closed, and the pressure in the rod cavity is balanced, so the piston stops moving. The first hydraulic cylinder 1 and the second hydraulic cylinder 2 stop advancing, the first syringe 15 and the second syringe 17 stop pushing the corrosion liquid, and the corrosion of the workpiece in the corrosion reaction cavity 26 stops. At the same time, the corrosion gas generated in the corrosion reaction cavity 26 accumulates on the upper part of the exhaust valve 27, causing the gas pressure in the valve to rise. When the pressure is greater than the system pressure exhaust valve opening pressure threshold, the float in the exhaust valve 27 drops, opening the exhaust port, and the corrosion gas enters the gas collection device 29 for treatment. As the gas is discharged, the gas pressure in the valve gradually decreases. When the gas pressure is lower than the system pressure exhaust valve closing pressure threshold, the float rises to close the exhaust port. At this time, if the gas concentration sensor 25 detects that the gas concentration is below the threshold, it will input an analog signal to the host controller 30. After receiving the instruction, the host controller 30 inputs a digital signal to the hydraulic propulsion system, and the 2YA of the three-position four-way electromagnetic reversing valve 7 is energized. Hydraulic oil flows through the three-position four-way electromagnetic reversing valve 7 and the oil injection oil line to the first sequence valve 3 and the second sequence valve 4, respectively, pushing the piston rod in the first hydraulic cylinder 1 and the second hydraulic cylinder 2 to move forward, and the first syringe 15 and the second syringe 17 continue to push the corrosion liquid into the corrosion reaction cavity 26, and the corrosion reaction continues.

[0026] End of corrosion stage: when the workpiece is finished etching, the main controller 30 inputs a digital signal to the hydraulic propulsion system, so that the 1YA of the three-position four-way electromagnetic reversing valve 7 is electrified. The hydraulic oil pushes the first hydraulic cylinder 1 and the second hydraulic cylinder 2 back through the return oil circuit, and the hydraulic oil flows to the first one-way valve 5 and the second one-way valve 6, respectively. At this time, the first sequence valve 3 and the second sequence valve 4 are closed, the hydraulic cylinder piston no longer pushes the syringe to inject the etching liquid, and the whole etching process is finished. The reacted etching liquid can be discharged through the etching liquid outlet 28.

[0027] After the application, through the cooperation of the hydraulic injection system, the etching system and the control system, the mixing speed of the two solutions can be accurately controlled, and the efficiency of the etching process is ensured. The design of the system makes the use of the etching liquid more efficient, reduces waste, and saves cost. The double syringe design avoids the mixing of the two liquids before the reaction, thereby preventing the deterioration of the etching liquid and ensuring the quality and performance of the etching liquid. Through the cooperation of the control system and the gas concentration sensor, the etching process can be monitored and adjusted in real time, greatly improving the etching quality of the etching liquid. The hydraulic injection system can be combined with modern control technology to realize automatic and intelligent operation, reduce human error, and improve production efficiency.

[0028] Example 1

[0029] Prepare two corrosion-resistant syringes made of polytetrafluoroethylene, which are the first syringe 15 and the second syringe 17. Their volume is 200 ml, and the piston slides smoothly and seals well. Prepare the first syringe container 16 and the second syringe container 18, also made of polytetrafluoroethylene, with a volume of 500 ml, for storing hydrochloric acid and nitric acid, respectively. According to the volume ratio of hydrochloric acid to nitric acid of 1:3, accurately measure the appropriate amount of hydrochloric acid and nitric acid. Measure 100 ml of 35% concentrated hydrochloric acid into the first syringe 15, and measure 300 ml of 65% concentrated nitric acid into the second syringe 17. Prepare the corrosion reaction chamber 26 with internal dimensions of length, width, and height, made of acid-resistant ceramic material, with a wall thickness of 2 cm, ensuring that the container is crack-free, leak-free, and internally clean and dry. Place a 50g iron block with a smooth surface and remove the oxide layer at the center of the bottom of the reaction chamber, ensuring that the iron block is placed securely. Check the gas concentration sensor 25, which has a measurement range of 0ppm-100ppm and an accuracy of ±2ppm, ensuring that the sensor is accurately calibrated and can work normally and communicate with the 30 main controller. Check the exhaust valve 27, which has an opening pressure threshold of 6kPa and a closing pressure threshold of 5kPa, ensuring that the valve operates smoothly and seals well. Connect the corrosion liquid injection pipeline 23, which is made of polytetrafluoroethylene, ensuring that the pipeline connection is tight and leak-free, and the pipeline length from the syringe outlet to the corrosion reaction chamber inlet is moderate without bending or blockage. Connect the on-off valve 24, which is a corrosion-resistant ball valve, ensuring smooth operation of the on-off valve and no leakage when closed. Check the hydraulic propulsion system, including the first oil tank 8, the second oil tank 10, and the third oil tank 12, ensuring that the hydraulic oil level in the oil tank is within the normal range and the oil is clean and free of impurities. Check the hydraulic pump 9, start the hydraulic pump 9, and observe whether the running sound and pressure output are normal, adjust the relief valve 11 so that it is in the closed position in the initial state, and set the relief pressure to 10MPa. Check the three-position four-way electromagnetic directional valve 7, which is controlled by the 30 main controller to switch the valve core position, ensuring that the oil path is normally connected and disconnected. Check the first sequence valve 3 and the second sequence valve 4, set the opening pressure of the sequence valve to 2MPa, check the first one-way valve 5 and the second one-way valve 6, and ensure that the one-way valve has good conductivity. Check the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and ensure that the piston rod made of 316 stainless steel moves smoothly without jamming and that the hydraulic cylinder seals well without leakage. Connect the first throttle valve 13 and the second throttle valve 14, and adjust the second throttle valve 14 so that the initial propulsion rate ratio of the first syringe and the second syringe is 1:3. Close the exhaust valve 27 and open the on-off valve 24 of the corrosion liquid injection pipeline 23. Start the hydraulic pump 9, at which time the relief valve 11 is closed, the 2YA of the three-position four-way electromagnetic directional valve 7 is energized, and the hydraulic oil enters the fast-forward stage. The hydraulic oil does not pass through the relief valve 11, but passes through the three-position four-way electromagnetic directional valve 7, and then flows to the first sequence valve 3 and the second sequence valve 4 through the oil injection oil path.At this time the first one-way valve 5, the second one-way valve 6 is closed, the hydraulic oil pushes the piston rod in the first hydraulic cylinder 1, the second hydraulic cylinder 2 forward movement, respectively push the first injector 15, the second injector 17 in the hydrochloric acid and nitric acid solution into the corrosion reaction cavity 26. By the second throttle valve 14 adjusts the moving rate of the first hydraulic cylinder 1, makes the first injector 15, the second injector 17 according to the ratio of 1:3 to deliver the corrosion liquid into the corrosion reaction cavity 26, mixes to form the reverse aqua regia to start corrosion iron block. Iron block starts to produce nitric oxide NO corrosion gas, gas concentration sensor 25 real-time monitoring. When the gas concentration reaches the preset first threshold 25ppm, the gas concentration sensor 25 will analog signal transmission to 30 host controller. 30 host controller receives the instruction, sends digital signal to the hydraulic propulsion system, makes the overflow valve 11 open, at this time the hydraulic system enters the work phase. Part of the hydraulic oil shunt through the overflow valve 11 flows back to the third oil tank 12, reduces the hydraulic oil of the first hydraulic cylinder 1, the second hydraulic cylinder 2, the first hydraulic cylinder 1, the second hydraulic cylinder 2 push speed slows down, the first injector 15, the second injector 17 push the corrosion liquid speed also slows down, thereby controls the corrosion rate of iron block, prevents the corrosion from being uneven or dangerous situation due to the reaction too fast. With the corrosion continues, when the corrosion gas concentration rises to the maximum threshold of the gas concentration sensor 25 80ppm, the gas concentration sensor 25 again will analog signal transmission to 30 host controller. 30 host controller receives the instruction, inputs digital signal to the hydraulic propulsion system, makes the three-position four-way electromagnetic reversing valve 7 middle energization. At this time the hydraulic oil directly flows back to the first oil tank 8 through the three-position four-way electromagnetic reversing valve 7, the hydraulic oil no longer passes through the first sequence valve 3, the second sequence valve 4, the first hydraulic cylinder 1, the second hydraulic cylinder 2 stops work, the first injector 15, the second injector 17 stop pushing the corrosion liquid, the corrosion of the iron block in the corrosion reaction cavity 26 stops. At the same time, the corrosion gas generated in the corrosion reaction cavity 26 gathers on the upper part of the exhaust valve 27, makes the gas pressure in the valve rise, when the pressure is greater than the system pressure 6kPa, the float in the exhaust valve 27 drops to open the exhaust port, the corrosion gas enters the gas collection device 29 for processing. With the gas exhaust, the gas pressure gradually decreases. When the gas pressure is lower than the system pressure 5kPa, the float of the exhaust valve 27 rises to close the exhaust port. At this time the gas concentration sensor 25 detects that the gas concentration is lower than the threshold 20ppm, the gas concentration sensor 25 will analog signal transmission to 30 host controller. 30 host controller receives the instruction, inputs digital signal to the hydraulic propulsion system, makes the 2YA of the three-position four-way electromagnetic reversing valve 7 energization, the hydraulic oil flows to the first sequence valve 3, the second sequence valve 4 through the three-position four-way electromagnetic reversing valve 7 and the oil injection oil way respectively, pushes the piston rod in the first hydraulic cylinder 1, the second hydraulic cylinder 2 forward movement, the first injector 15, the second injector 17 continues to push the corrosion liquid into the corrosion reaction cavity 26, the corrosion reaction continues.The corrosion process is continuously monitored, and when the iron block is corroded, the host controller inputs a digital signal to the hydraulic propulsion system, so that the 1YA of the three-position four-way electromagnetic reversing valve 7 is electrified. The hydraulic oil pushes the first hydraulic cylinder 1 and the second hydraulic cylinder 2 to retreat backward through the oil return oil way, and the hydraulic oil flows to the first one-way valve 5 and the second one-way valve 6, at this time, the first sequence valve 3 and the second sequence valve 4 are closed, the hydraulic cylinder piston no longer pushes the syringe to inject the corrosion liquid, and the corrosion stops.

[0030] It should be noted that in this text, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0031] The above application of specific examples to the present application is described, only for help to understand the present application, and not to limit the present application. For the skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformation or replacement can be made.

Claims

1. A precise corrosion rate control device based on hydraulic and sensing technology, characterized in that, include: The corrosion structure is used to contain the workpiece to be corroded and inject two kinds of corrosive liquids into the workpiece. The pressure of the corrosive gas generated during the corrosion process is monitored and transmitted to the control system in real time. The hydraulic propulsion system is used to provide power for the propulsion of two corrosive liquids in the corrosive structure, and to achieve the propulsion and delivery of the two corrosive liquids in a set ratio by controlling the propulsion rate; The control system is used to control the propulsion rate and start / stop of the hydraulic propulsion system based on the monitored pressure value, and to control the corrosion progress.

2. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 1, characterized in that, The hydraulic propulsion system comprises a first oil tank, a second oil tank, a third oil tank, a hydraulic pump, a relief valve, a three-position four-way solenoid directional valve, a first sequence valve, a second sequence valve, a first check valve, a second check valve, a first hydraulic cylinder, a second hydraulic cylinder, and a first throttle valve and a second throttle valve. The hydraulic pump's suction port is connected to the second oil tank, and its outlet port is connected to the first throttle valve and the relief valve. The relief valve is connected to the third oil tank. The first throttle valve is connected to the P port of the three-position four-way solenoid directional valve. The A port of the three-position four-way solenoid directional valve is directly connected to the rodless chamber of the first hydraulic cylinder through the first working oil circuit, and the B port is connected to... The second working oil circuit is directly connected to the rodless chamber of the second hydraulic cylinder, and the T-port is connected to the first oil tank through the return oil circuit; the rod chamber of the first hydraulic cylinder is connected to the parallel oil circuit of the first sequence valve and the first check valve through the second throttle valve, and the outlet of the parallel oil circuit is connected to the return oil circuit of the T-port of the three-position four-way solenoid directional valve; the rod chamber of the second hydraulic cylinder is connected to the parallel oil circuit of the second sequence valve and the second check valve, and the outlet of the parallel oil circuit is connected to the return oil circuit of the T-port of the three-position four-way solenoid directional valve; by adjusting the second throttle valve, the proportional control of the propulsion rate of the first hydraulic cylinder and the second hydraulic cylinder is realized.

3. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 1, characterized in that, The corrosion structure includes a first syringe, a second syringe, a first syringe container, a second syringe container, a corrosion liquid injection line, a switching valve, a gas concentration sensor, a corrosion reaction chamber, and an exhaust valve. The first syringe container and the second syringe container are respectively connected to the inlet ports at the top of the first syringe and the second syringe. The outlets of the first syringe and the second syringe are connected to the corrosion reaction chamber through the corrosion liquid injection line and are equipped with a switching valve to control the flow of the corrosion liquid. The gas concentration sensor is located inside the corrosion reaction chamber to monitor the concentration of corrosive gas generated by the corrosion reaction in real time. The exhaust valve is located at the top of the corrosion reaction chamber and opens when the pressure of the corrosive gas inside the chamber reaches a set threshold.

4. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 3, characterized in that, The corrosion structure also includes a gas collection device, and when the exhaust valve is opened, the corrosive gas is discharged to the gas collection device.

5. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 3, characterized in that, The bottom of the corrosion reaction chamber is equipped with an outlet for the corrosive liquid to drain out the corrosive liquid after the reaction.

6. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 2, characterized in that, The control system receives the real-time corrosive gas concentration signal sent by the corroded structure, sends control commands to the three-position four-way solenoid valve, realizes the control of the working state of the hydraulic propulsion system, and thus regulates the corrosion process.

7. The precision corrosion rate control device based on hydraulic and sensing technology according to claim 2 or 6, characterized in that, When the gas concentration reaches the set first threshold, the control system opens the relief valve; some hydraulic oil is diverted from the relief valve into the third oil tank, reducing the flow rate into the rodless chambers of the first and second hydraulic cylinders, lowering the pressure in the rodless chambers, slowing the piston advance rate, and reducing the speed at which the first and second injectors deliver the corrosive liquid; the oil in the rod chamber of the first hydraulic cylinder flows into the first oil tank via the first check valve, and the oil in the rod chamber of the second hydraulic cylinder flows into the first oil tank via the second check valve; when the corrosive gas concentration rises to the set maximum threshold, the control system energizes the three-position four-way solenoid directional valve in the neutral position. When the magnetic directional valve's P, A, and B ports are closed, and the T port is connected to the first oil tank, the rodless chambers of the first and second hydraulic cylinders are sealed, the pressure in the rod chambers is balanced, and the piston stops moving. The first and second injectors stop pushing the corrosive liquid. If the gas concentration is detected to be below the threshold, the control system energizes the 2YA valve of the three-position four-way solenoid directional valve. The hydraulic oil then flows again through the three-position four-way solenoid directional valve and the oil injection circuit to the first and second sequence valves, pushing the piston rods in the first and second hydraulic cylinders forward. The first and second injectors continue to push the corrosive liquid, and the corrosion reaction continues.

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