A radiation online cleaning device, control system and control method

Abstract

The present invention belongs to the technical field of water jet cleaning, and discloses a radiation online cleaning device, control system and control method. The method of computer numerical simulation is adopted, and based on the optimal purge system structure, the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the diameter of the cleaning pipes, the water jet velocity, the gas volume fraction and the working state of the cleaning pipes on the performance of the sealing plate cleaning system are analyzed to realize the control of the radiation online cleaning device; wherein, for the entire radiation online cleaning device, the influencing factors include the distance between the jet nozzle and the sealing plate and the position of the double cleaning pipes; for the sealing plate detection area, the influencing factors include the cleaning pipe diameter, the water jet velocity and the gas volume fraction; for the sealing plate low dynamic pressure area, the influencing factor is the cleaning pipe working state. The present invention analyzes the influence of the cleaning pipe parameters on the sealing plate cleaning system, and realizes the effective cleaning of the entire sealing plate. The present invention has important guiding significance for the actual transformation and operation of the radiation online measurement device.

Description

Technical Field

[0001] The present invention belongs to the technical field of water jet cleaning, and in particular relates to a radiation online cleaning device, a control system and a control method. Background Art

[0002] At present, water jet cleaning is a cleaning method that uses the impact kinetic energy generated by water jets to remove pollutants from the target surface. It was first used in the mid-19th century. Its cleaning effect mainly depends on the jet flow pressure and effective action area. A large number of studies and practices have shown that water jet cleaning technology has the following advantages:

[0003] (1) Environmental protection: Compared with chemical cleaning, water jets with clean water as the main medium will not produce toxic waste liquids that pollute water and soil; compared with mechanical cleaning methods, water jet cleaning will not produce a large amount of dust that pollutes the environment. On the contrary, the atomization effect of water jets can significantly reduce the dust concentration in the air, improve the air quality in the work area, and protect the health of workers.

[0004] (2) Fast cleaning speed: The water jet breaks up the dirt on the target surface through the combined effects of shearing, grinding, erosion, etc. The cleaning speed is several to dozens of times that of chemical cleaning, manual cleaning, and sandblasting. At the same time, parts cleaned by water jet generally do not need secondary cleaning. Chemical cleaning requires the use of clean water to clean the chemical reagents remaining on the target surface.

[0005] (3) Good cleaning effect: The high-energy high-pressure water jet can destroy the dirt structure and remove all blockages and scaling inside the pipe. Generally speaking, if the appropriate water pressure is selected, the high-pressure water jet will not damage the pipeline system or the pipeline material.

[0006] (4) Low cleaning cost: Tap water can be directly used as the water jet medium. At the same time, due to the large cleaning energy, the water jet can clean the target surface without adding detergents or fillers.

[0007] (5) Wide application range and easy automation and mechanization: Water jet can clean equipment with complex surface or internal structure under relatively harsh environmental conditions, and has low requirements on equipment material and dirt type. High-pressure water is transported to the cleaning site through pipelines, and the cleaning pressure and frequency can be adjusted at any time.

[0008] Based on the above advantages, water jet cleaning technology has been widely used. The use of water jet cleaning technology can simplify the plate cleaning process and increase the continuous operation time of the device. In addition, with the development of water jet cleaning technology, its types are gradually increasing. According to the different characteristics of jet technology, water jet cleaning can be divided into pure water jet, abrasive jet, pulse jet and cavitation jet. The characteristics of each jet are as follows:

[0009] Pure water jet uses pure water as the medium and uses high-energy water flow generated by high-speed water. The biggest advantage of this jet cleaning method is that the cleaning medium is easy to obtain and the cost is low. It is mainly used for cleaning and rust removal of board materials, and can also be used for cutting non-metallic materials such as wood, plastic, paper, leather, and rock. This jet method has high pressure requirements for equipment and components, which will increase the cost of use and reduce equipment reliability.

[0010] Abrasive jets improve the working efficiency of water jets by adding high-density abrasives to pure water, significantly enhancing the jet impact and grinding effect on the target surface. However, while improving the jet effect, abrasive jets will cause greater erosion and wear on the surface of the equipment.

[0011] The cavitation jet combines the cavitation phenomenon with the jet technology, and uses the impact force generated by the collapse of the cavitation bubble to enhance the impact effect of the jet on the target surface. A large number of studies have pointed out that the collapse of the cavitation bubble can produce a high-pressure environment of more than 50MPa, and may also produce a strong shock wave. Therefore, under the same conditions, the cleaning effect of the cavitation jet cleaning technology is significantly better than that of the pure water jet, but the conditions required for its generation are higher and the damage to the equipment is greater.

[0012] Pulse jet uses special equipment to make the jet hit the target surface in the form of pulses. Its essence is to use the water hammer effect to form impact pressure on the target surface. The cleaning, crushing and cutting effects are also better than pure water jets. According to the jet frequency, jet energy, jet length and jet diameter, the methods of generating this jet can be divided into flow regulation method, pressure extrusion method and concentrated energy release method. The conditions required for the generation of this jet method are also high.

[0013] Through the above brief introduction to water jet cleaning methods, it can be found that although the cleaning effects of abrasive jets, cavitation jets and pulse jets are better than those of pure water jets, these jet cleaning methods are costly and cause great damage to the equipment.

[0014] Water jet cleaning technology has significant advantages and has received attention from countries around the world. At present, there are many literatures introducing the experimental progress of water jet cleaning technology. In the study of water jet process parameters and flow field distribution laws, Teimourian et al. studied the influence of water jet process parameters on paint removal effect. The results show that the greater the jet energy, the greater the loss of substrate mass; increasing the static load intensity and increasing the load frequency can improve the paint removal effect of water jet. Zhang Hongshen et al. designed a jet cleaning device for removing passenger car coatings, studied the influence of the device's jet pressure, velocity, target distance and impact angle on the coating removal effect, and based on the experimental results, fitted the relationship between each jet parameter and coating removal rate. Campbell et al. used high-speed video imaging technology, laser scattering technology and thermal imaging technology to study the laws of cavitation jets. The results show that along the jet flow direction, the jet produces periodic fluctuations; the longer the jet time, the greater the damage to the target surface. These research results have promoted the development of jet theory. Stoye et al. analyzed the characteristics of each part of the pulse jet, and conducted experiments to compare its cleaning effect with that of the continuous jet, and found that the cleaning effect of the pulse jet was significantly better than that of the continuous jet. The experimental results provide a theoretical basis for the widespread application of pulse jets. A large number of practical studies have shown that water jet nozzles have an important influence on the cleaning effect, so scholars at home and abroad have also conducted in-depth research on it. Rajaratnam et al. analyzed the distribution law of the velocity and volume fraction of the water jet outside the nozzle through experiments. Jou et al. used linear stability theory to study the influence of nozzle size on jet stability. The study showed that: the jet boundary is composed of continuous waves; when high-frequency waves are added to the jet, its stability is not affected by the nozzle size.

[0015] At present, with the development of science and technology, water jet cleaning technology has gradually been used in devices with harsh working environments and complex structures. The use of experimental methods to study its theory and application has great limitations. Computational Fluid Dynamics (CFD) overcomes difficulties such as equipment size, measurement accuracy, and external environment, reduces research cycles, and reduces research costs, providing a very effective means for many scholars at home and abroad to study jet cleaning theory. In the study of water jet cleaning parameters and flow field distribution laws, Shi Fengxia et al. used numerical simulation methods to study the influence of gas content in jet cleaning and found that the maximum jet velocity increased with the increase of gas content. When the gas content increased to 7.4%, the maximum jet velocity reached the maximum. Guha et al. used Fluent software to study the effect of target distance on jet cleaning effect. The study showed that if the target distance is too small, the jet will rebound from the target surface, affecting the flow of the jet at the nozzle; if the target distance is too large, the momentum transferred to the environment by the jet increases, the pressure loss increases, and the cleaning efficiency decreases; when the distance between the nozzle and the wall is 5 to 26 times the nozzle diameter, the jet cleaning effect is optimal. Zhang Ziwei et al. studied the effects of jet pressure, impact angle and target distance on the cleaning effect of the target surface. The study found that when the jet pressure is too large, the pipe wall will be damaged; when the jet cleaning effect is optimal, the impact angle is 60°; as the target distance increases, the impact force on the target surface shows a pattern of first increasing and then decreasing. Zhu Benben et al. conducted a numerical simulation study on the cleaning effect of a gas-liquid mixing device. The results show that the initial velocity of the gas has no obvious effect on the gas-liquid mixing effect; the effective cleaning area increases with the increase of the mixed jet pressure, but the growth rate decreases. Nie et al. studied the distribution law of the flow field when the jet collides with the wall. The results show that when the distance between the nozzle and the wall is 2 to 7 times the nozzle diameter, the jet stagnation pressure reaches the maximum; the jet impact dynamic pressure is related to the inlet pressure. Based on theoretical analysis, Wang et al. used abrasive particles as a pseudo-fluid phase, established a two-fluid model of abrasive water jet, and simulated the two-dimensional flow field outside the abrasive water jet nozzle. The calculation results are consistent with the experimental results.

[0016] In the study of jet nozzles, Hou et al. conducted a numerical simulation study on the velocity distribution law in abrasive jet nozzles. In the study of gas-liquid two-phase flow, it was found that the nozzle cone angle has an effect on the position of the vortex and the distribution of velocity on the cone surface; in the study of liquid-solid two-phase flow, it was found that the velocity is the largest at the center of the nozzle outlet surface; in the study of gas-liquid-solid three-phase flow, it was found that the abrasive is mainly distributed along the inner surface of the nozzle and the gas is mainly distributed at the position where the vortex is generated. Zhang Jizhi et al. analyzed the flow field distribution law of cylindrical nozzles, conical nozzles and cosine nozzles. The results show that the jet back thrust of the cylindrical nozzle is the worst; with the increase of the inner diameter of the nozzle outlet, the water jet back thrust increases significantly; when the diameter is the same, the cosine nozzle jet back thrust is about 7.9% higher than that of the conical nozzle.

[0017] Through the above brief introduction to the current status of water jet cleaning research, it can be found that with reasonable structural parameters and input parameters, water jets can effectively clean the target surface. At the same time, the research method of using numerical simulation to predict the flow characteristics of water jets has been widely used in engineering practice and experimental research. Therefore, it is urgent to design a new radiation online cleaning device, control system and control method.

[0018] Through the above analysis, the problems and defects of the prior art are as follows:

[0019] (1) In the existing water jet cleaning technology, pure water jet uses pure water as the medium and uses high-energy water flow generated by high-speed water to work, which has high pressure requirements on equipment and components, increases the cost of use, and reduces equipment reliability.

[0020] (2) In the existing water jet cleaning technology, abrasive jets will cause great erosion and wear on the equipment surface; the conditions required for the generation of cavitation jets and pulse jets are high and cause great damage to the equipment. Summary of the invention

[0021] In view of the problems existing in the prior art, the present invention provides a radiation online cleaning device, a control system and a control method.

[0022] The present invention is implemented as follows: a control method for a radiation online cleaning device, the control method for the radiation online cleaning device comprising:

[0023] The computer numerical simulation method is used on the basis of the optimal purge system structure to analyze the effects of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system, so as to realize the control of the radiation online cleaning device.

[0024] Among them, for the entire radiation online cleaning device, the influencing factors include the distance between the jet nozzle and the sealing plate and the position of the double cleaning pipes; for the sealing plate detection area, the influencing factors include the cleaning pipe diameter, water jet velocity and gas volume fraction; for the sealing plate low dynamic pressure area, the influencing factor is the working state of the cleaning pipe.

[0025] Furthermore, the control method of the radiation online cleaning device comprises the following steps:

[0026] Step 1: Analyze the influence of the distance between the jet nozzle and the sealing plate to determine the optimal distance;

[0027] Step 2: Analyze the influence of the position of the double cleaning pipes and determine the optimal working condition;

[0028] Step 3: Analyze the influence of different factors on the cleaning effect of the sealing plate detection area;

[0029] Step 4: Analyze the impact of the working status of the cleaning pipe and determine the cleaning method.

[0030] Furthermore, in step 1, it is determined that the distance between the jet nozzle and the sealing plate is 6 mm as the optimal distance.

[0031] In step 2, it is determined that the angle between the two cleaning pipes is 0° and the spacing is 30 mm, which is the optimal working condition.

[0032] Furthermore, the factors in step three include cleaning tube diameter, jet velocity and gas volume fraction; a cleaning tube diameter of 16 mm, a water jet velocity of 6 m / s and pure water working conditions are selected as the optimal working conditions.

[0033] Furthermore, in step 4, a cleaning method of alternately opening the two cleaning pipes is adopted.

[0034] Another object of the present invention is to provide a control system for a radiation online cleaning device for implementing the control method of the radiation online cleaning device, the control system for the radiation online cleaning device comprising:

[0035] The optimal distance determination module is used to analyze the influence of the distance between the jet nozzle and the sealing plate and determine the optimal distance;

[0036] The optimal working condition determination module is used to analyze the influence of the dual cleaning pipe positions and determine the optimal working condition;

[0037] The cleaning method determination module is used to analyze the impact of different factors on the cleaning effect of the sealing plate detection area; analyze the impact of the working state of the cleaning tube and determine the cleaning method.

[0038] Another object of the present invention is to provide a radiation online cleaning device that implements the control method of the radiation online cleaning device, wherein the radiation online cleaning device includes: a sealing plate cleaning pipe, a cleaning liquid outlet pipe, a circulation pool and a sealing plate; wherein the cleaning liquid outlet pipe is a liquid inlet pipe; the top wall of the circulation pool is a sealing plate detection area; the upper wall of the sealing plate interlayer and the sealing plate detection area constitute an upper sealing plate, and the lower wall of the sealing plate interlayer is a lower sealing plate; the angle between the sealing plate cleaning pipe and the horizontal plane is 30°.

[0039] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the control method of the radiation online cleaning device.

[0040] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the control method of the radiation online cleaning device.

[0041] Another object of the present invention is to provide an information data processing terminal, which is used to implement the radiation online cleaning device.

[0042] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0043] The control method of the radiation online cleaning device provided by the present invention analyzes the influence of the cleaning pipe parameters such as the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, and the cleaning pipe diameter on the sealing plate cleaning system on the basis of the optimal purge system structure. The present invention analyzes and finds that the parallel arrangement of the two cleaning pipes and the reduction of the distance between the jet nozzle and the sealing plate can effectively improve the sealing plate cleaning effect; increasing the cleaning pipe diameter and the water jet speed can increase the flushing effect of the jet on the sealing plate, but the influence of the water jet speed is more significant; the analysis of the working state of the cleaning pipe finds that the cleaning method of using the two cleaning pipes to work alternately can effectively reduce the low dynamic pressure area on the sealing plate.

[0044] As the device is used for a longer time, aerosols will inevitably accumulate on the sealing plate of the circulation pool. In order to simplify the sealing plate cleaning process and increase the continuous operation time of the device, the cleaning fluid with a certain speed from the outside is sprayed through the cleaning pipe to clean the sealing plate without disassembling the device. Based on the optimal purge system structure, the present invention draws on the analysis method of jet cleaning by scholars at home and abroad, and conducts numerical simulation analysis on the sealing plate cleaning system of the device. The analysis factors include the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the jet velocity, the cleaning pipe diameter, the gas volume fraction and the working state of the cleaning pipe.

[0045] The present invention adopts the method of computer numerical simulation and takes the optimal purge system structure as the basis to deeply analyze the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system.

[0046] The present invention adopts the method of computer numerical simulation to carry out detailed analysis of the purge system and the sealing plate cleaning system of the radiation online measurement device, and finally successfully reduces the cross-sectional aerosol concentration within the range of 80mm below the sealing plate detection area to below 10ppm, and realizes the effective cleaning of the entire sealing plate, and has achieved certain results.

[0047] The present invention analyzes the influence of the cleaning pipe parameters on the sealing plate cleaning system. For the entire sealing plate, the influencing factors include the distance between the jet nozzle and the sealing plate and the position of the double cleaning pipes; for the sealing plate detection area, the influencing factors include the cleaning pipe diameter, the water jet velocity and the gas volume fraction; for the sealing plate low dynamic pressure area, the influencing factor is the working state of the cleaning pipe. The present invention optimizes the input parameters and structural parameters of the radiation online cleaning device, and ensures that the entire sealing plate can be effectively cleaned without disassembling the device, which has guiding significance for the actual transformation and operation of the radiation online measurement device.

[0048] Whether the technical solution of the present invention solves the technical problems that people have been eager to solve but have never succeeded in solving: the present invention solves the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the diameter of the cleaning pipes, the water jet velocity, the gas volume fraction and the working state of the cleaning pipes on the performance of the sealing plate cleaning system and the size of the effect, successfully realizes the optimized control of the radiation online cleaning device, and solves the difficult problems in the field of radiation online cleaning technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 is a flow chart of a control method of a radiation online cleaning device provided by an embodiment of the present invention;

[0051] Figure 2 Schematic diagram of the arrangement of cleaning pipes provided in an embodiment of the present invention; Figure (a) is arranged in a vertical direction, and Figure (b) is arranged in a horizontal direction;

[0052] Figure 3 1 is a cloud diagram of the dynamic pressure distribution of the upper sealing plate provided in an embodiment of the present invention; Figure (a) is 6 mm, Figure (b) is 16 mm, and Figure (c) is 26 mm;

[0053] Figure 4 Schematic diagram of the position of the double cleaning pipes provided in an embodiment of the present invention; Figure (a) is a schematic diagram of the position of the double cleaning pipes in working condition one, and Figure (b) is a schematic diagram of the position of the double cleaning pipes in working condition two;

[0054] Figure 5 Schematic diagram of the position of the double cleaning pipes provided in an embodiment of the present invention; Figure (a) is a schematic diagram of the position of the double cleaning pipes in working condition three, and Figure (b) is a schematic diagram of the position of the double cleaning pipes in working condition five;

[0055] Figure 61 is a cloud diagram of the dynamic pressure distribution of the upper sealing plate provided in an embodiment of the present invention; Figure (a) is working condition 1, Figure (b) is working condition 2, Figure (c) is working condition 3, Figure (d) is working condition 4, and Figure (d) is working condition 5;

[0056] Figure 7 1 is a cloud diagram of the dynamic pressure distribution in the sealing plate detection area provided by an embodiment of the present invention; Figure (a) is 10 mm, Figure (b) is 12 mm, Figure (c) is 14 mm, and Figure (d) is 16 mm;

[0057] Figure 8 It is a dynamic pressure distribution cloud diagram of the sealing plate detection area provided by an embodiment of the present invention; Figure (a) is 3m / s, Figure (b) is 4m / s, Figure (c) is 5m / s, and Figure (d) is 6m / s;

[0058] Fig. 9 1 is a cloud diagram of dynamic pressure distribution in the sealing plate detection area provided by an embodiment of the present invention; Figure (a) is 0%, Figure (b) is 5%, Figure (c) is 8%, and Figure (d) is 11%;

[0059] Fig.10 1 is a cloud diagram of the dynamic pressure distribution of the upper sealing plate provided by an embodiment of the present invention; Figure (a) shows that the two cleaning pipes are working at the same time, Figure (b) shows that the left cleaning pipe is working, and Figure (c) shows that the right cleaning pipe is working;

[0060] Fig.11 It is a schematic diagram of the structure of the sealing plate cleaning device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0062] In view of the problems existing in the prior art, the present invention provides a radiation online cleaning device, a control system and a control method. The present invention is described in detail below with reference to the accompanying drawings.

[0063] In order to enable those skilled in the art to fully understand how to implement the present invention in detail, this section is an explanatory embodiment that expands and describes the technical solution of the claims.

[0064] The control method of the radiation online cleaning device provided by the embodiment of the present invention includes:

[0065] The computer numerical simulation method is used on the basis of the optimal purge system structure to analyze the effects of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system, so as to realize the control of the radiation online cleaning device.

[0066] Among them, for the entire radiation online cleaning device, the influencing factors include the distance between the jet nozzle and the sealing plate and the position of the double cleaning pipes; for the sealing plate detection area, the influencing factors include the cleaning pipe diameter, water jet velocity and gas volume fraction; for the sealing plate low dynamic pressure area, the influencing factor is the working state of the cleaning pipe.

[0067] like Figure 1 As shown, the control method of the radiation online cleaning device provided by the embodiment of the present invention includes the following steps:

[0068] S101, analyzing the influence of the distance between the jet nozzle and the sealing plate, and determining the optimal distance;

[0069] S102, analyzing the influence of the positions of the dual cleaning pipes and determining the optimal working conditions;

[0070] S103, analyzing the influence of different factors on the cleaning effect of the sealing plate detection area;

[0071] S104, analyzing the influence of the working state of the cleaning pipe and determining the cleaning method.

[0072] The present invention adopts the method of computer numerical simulation, based on the optimal purge system structure, and deeply analyzes the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system, and obtains the following conclusions:

[0073] (1) In the analysis of the distance between the jet nozzle and the sealing plate, it was found that for the sealing plate detection area, as the distance increases, the collision between the jet and the sealing plate detection area weakens and the diffusion is limited, the cleaning dynamic pressure and area are reduced, and the cleaning effect becomes worse. For the sealing plate interlayer, when the distance is 6mm, more high-speed water flows into the sealing plate interlayer, and the cleaning effect is better. The optimal working condition is when the distance between the jet nozzle and the sealing plate is 6mm.

[0074] (2) In the analysis of the position of the double cleaning pipes, it was found that when the angle between the two cleaning pipes was 120° and 180°, the two jets interfered with each other, could not fully develop and had a lot of energy loss. The cleaning dynamic pressure at the edge of the sealing plate detection area and near its center was low, and most of the sealing plate interlayer area was not effectively cleaned. When the angle between the two cleaning pipes was 0°, the spacing was 30mm, and the distance between the jet nozzle and the sealing plate was 6mm, the cleaning area and dynamic pressure on the sealing plate increased significantly, and the cleaning effect was greatly improved. Subsequently, changing the distance between the jet nozzle and the sealing plate and the spacing between the two cleaning pipes had no obvious effect.

[0075] (3) In the analysis of the sealing plate detection area, it was found that as the diameter of the cleaning pipe increases, the water jet flow rate increases, the energy carried and the contact area with the detection area increase, the dynamic pressure distribution becomes better, and the optimal working condition is a cleaning pipe diameter of 16mm. As the water jet speed increases, the water jet energy increases, the scouring effect on the sealing plate is enhanced, and the optimal working condition is a water jet speed of 6m / s.

[0076] (4) In the analysis of the working status of the cleaning pipes, it was found that when the two cleaning pipes were working at the same time, the two jets interfered with each other and the dynamic pressure distribution of the sealing plate was poor. When only the left cleaning pipe was opened, the single jet could fully develop, and the dynamic pressure of the sealing plate detection area along the flow direction of the jet body increased. However, due to the limited radiation range of the single water flow, there were still some areas with lower dynamic pressure in the detection area. Most of the water flow entering the sealing plate interlayer flowed to the right half of the interlayer, and the left half of the interlayer was not effectively cleaned. When only the right cleaning pipe was opened, the cleaning effect of the entire sealing plate was opposite to that of only opening the left cleaning pipe. Combining the cleaning effects of the three working conditions, it was found that the superposition of the cleaning effects of the two single cleaning pipe working conditions can basically achieve effective cleaning of the entire sealing plate. Therefore, when the sealing plate cleaning system is working, it is recommended to adopt the cleaning method of alternately opening the two cleaning pipes.

[0077] In step S101 provided in the embodiment of the present invention, it is determined that the distance between the jet nozzle and the sealing plate is 6 mm as the optimal distance.

[0078] In step S102 provided in the embodiment of the present invention, it is determined that the angle between the two cleaning pipes is 0° and the spacing is 30 mm, which is the optimal working condition.

[0079] The factors in step S103 provided in the embodiment of the present invention include the cleaning tube diameter, the jet velocity and the gas volume fraction; the cleaning tube diameter of 16 mm, the water jet velocity of 6 m / s and the pure water working condition are selected as the optimal working conditions.

[0080] In step S104 provided in the embodiment of the present invention, a cleaning method of alternately opening two cleaning pipes is adopted.

[0081] The control system of the radiation online cleaning device provided by the embodiment of the present invention includes:

[0082] The optimal distance determination module is used to analyze the influence of the distance between the jet nozzle and the sealing plate and determine the optimal distance;

[0083] The optimal working condition determination module is used to analyze the influence of the dual cleaning pipe positions and determine the optimal working condition;

[0084] The cleaning method determination module is used to analyze the impact of different factors on the cleaning effect of the sealing plate detection area; analyze the impact of the working state of the cleaning tube and determine the cleaning method.

[0085] like Fig.11As shown, the radiation online cleaning device provided by the embodiment of the present invention includes: a sealing plate cleaning pipe, a cleaning liquid outlet pipe, a circulation pool and a sealing plate; wherein the cleaning liquid outlet pipe is a feed liquid inlet pipe; the top wall of the circulation pool is a sealing plate detection area; the upper wall of the sealing plate interlayer and the sealing plate detection area constitute an upper sealing plate, and the lower wall of the sealing plate interlayer is a lower sealing plate; the angle between the sealing plate cleaning pipe and the horizontal plane is 30°.

[0086] The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the prior art. The following content is described in conjunction with data, charts, etc. of the test process.

[0087] Example: Analysis of sealing plate cleaning characteristics

[0088] As the device is used for a longer time, aerosols will inevitably accumulate on the sealing plate of the circulation pool. In order to simplify the sealing plate cleaning process and increase the continuous operation time of the device, the cleaning fluid with a certain speed from the outside is sprayed through the cleaning pipe to clean the sealing plate without disassembling the device. Based on the optimal purge system structure, the embodiment of the present invention draws on the analysis method of jet cleaning by scholars at home and abroad, and conducts numerical simulation analysis on the sealing plate cleaning system of the device. The analysis factors include the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the jet velocity, the cleaning pipe diameter, the gas volume fraction and the working state of the cleaning pipe.

[0089] 1. Influence of the distance between the jet nozzle and the sealing plate

[0090] Figure 2 Schematic diagram of cleaning pipe layout. Figure 2 (a) describes the vertical position of the cleaning pipe, that is, the angle between the cleaning pipe and the sealing plate. When analyzing the effect of the distance between the jet nozzle and the sealing plate on the sealing plate cleaning system, the angle between the cleaning pipe and the sealing plate is always kept at 30°. Figure 2 (b) describes the horizontal position of the cleaning pipe, that is, the angle between it and the longitudinal section of the flow cell. The light gray dot in the figure is the center position of the collision between the jet and the sealing plate. To simplify the description, the embodiment of the present invention simply refers to it as the collision center.

[0091] In this simulation, the distance between the overflow pipe and the sealing plate of the final optimized working condition is selected as 159mm, and the gas inlet pipe, gas outlet pipe and overflow pipe are kept in a closed state. The influence of the distance between the jet nozzle (the interface between the cleaning pipe and the wall of the circulation pool) and the sealing plate on the sealing plate cleaning system is analyzed. In the original working condition, the distance between the jet nozzle and the sealing plate is 6mm, and the distances of the two modified working conditions are 16mm and 26mm respectively. Other parameters are consistent with the original working condition.

[0092] Figure 3It is the upper sealing plate dynamic pressure distribution cloud map. The area surrounded by the black circular wire frame with a smaller diameter in the cloud map represents the sealing plate detection area. It can be found from the cloud map that as the distance between the jet nozzle and the sealing plate increases, the upper sealing plate dynamic pressure cloud maps of the three working conditions show similar distribution patterns. In the sealing plate detection area, the dynamic pressure in the area where the jet body collides with the sealing plate is higher, so this part of the area is more strongly scoured and the cleaning will be cleaner. For the sealing plate interlayer, the dynamic pressure inside the sealing plate interlayer at the impact of the jet body is significantly smaller than that in the surrounding area. This is because the water flows out from the cleaning pipe to the sealing plate detection area, enters the sealing plate interlayer along the wall of the detection area and directly impacts this area, causing the water flow velocity in this area to be close to 0.

[0093] For the sealing plate detection area, as the distance between the jet nozzle and the sealing plate increases, the cleaning dynamic pressure and cleaning area both decrease. On the one hand, this is because the jet is subjected to gravity for a longer time, the speed at which it reaches the sealing plate decreases, and the intensity of the collision decreases. On the other hand, this is because the distance between the collision center and the wall of the circulation pool in front of the main flow of the jet decreases, the diffusion of the jet in the detection area is limited, the rebound volume increases, and the rear jet flow is affected. For the sealing plate interlayer, when the distance increases from 6mm to 26mm, the cleaning dynamic pressure tends to decrease. This is because the water flow rate flowing horizontally along the sealing plate wall decreases, and the water inflow into the sealing plate interlayer decreases. Taking into account the cleaning effects of the three working conditions, a distance of 6mm between the jet nozzle and the sealing plate is selected as the optimal working condition.

[0094] 2. Influence of the position of double cleaning pipes

[0095] Based on the analysis of the effect of the distance between the jet nozzle and the sealing plate on the sealing plate cleaning system, in order to ensure that both the sealing plate detection area and the interlayer can be cleaned, a distance of 6mm between the jet nozzle and the sealing plate is selected as the optimal working condition. However, at this time, there are areas with low dynamic pressure in both the sealing plate detection area and the interlayer, and this area cannot be eliminated by moving the position of the cleaning pipe. A sealing plate cleaning pipe with the same size and symmetrical position with respect to the longitudinal section of the circulation pool is added. The embodiment of the present invention sets a total of five working conditions to analyze the effect of the position of the double cleaning pipe on the sealing plate cleaning system. The angle between the cleaning pipe and the sealing plate is always maintained at 30°. The parameter settings of each working condition are shown in Table 1. Figure 4 and Figure 5 The difference between working condition 3 and working condition 4 is the distance between the jet nozzle and the sealing plate. Only the schematic diagram of the two cleaning pipe positions of working condition 3 is shown here.

[0096] Table 1 Working condition parameter setting table

[0097]

[0098]

[0099] Figure 6The upper sealing plate dynamic pressure distribution cloud map. It can be seen that for the sealing plate detection area, the dynamic pressure cloud map distribution patterns of working conditions one and two are similar. The two jets form a symmetrical dynamic pressure field, and the dynamic pressure in the area close to the center of the dynamic pressure field is higher, so this part of the area will be cleaned more cleanly. The dynamic pressure at the edge of the detection area is low, because the two jets interfere with each other on the sealing plate and cannot fully develop on the sealing plate. The dynamic pressure near the center of the detection area is also low, because the two jets collide here, the energy loss is large, and the jet speed is reduced. The distribution patterns of the dynamic pressure cloud maps of working conditions four and five are similar. The two jets collide with the sealing plate to form a symmetrical dynamic pressure field, and the dynamic pressure of some detection areas close to the flow-limiting area is low, which is caused by the limited diffusion range of the jets. The difference between the two working conditions is that the low dynamic pressure area between the two jets in working condition four is smaller, because the distance between the two jets is closer. The cleaning effect of the sealing plate detection area of ​​working conditions one, working condition two, working condition four and working condition five cannot be judged only from the cloud map. For working condition three, it can be seen from the cloud map that, compared with the other four working conditions, the low dynamic pressure area in the sealing plate detection area is significantly reduced and the cleaning effect is significantly improved. This is because the mutual interference between the two jets is reduced and can be fully developed in the sealing plate detection area.

[0100] from Figure 6 It can also be seen that for the sealing plate interlayer, there is no significant difference in the cleaning effect between working conditions one and two, and only a very small amount of high dynamic pressure water flow enters the interlayer, which is not conducive to the cleaning of the interlayer. The distribution patterns of the dynamic pressure cloud diagrams of working conditions three, four and five are similar. After the jet body impacts the sealing plate, it enters the sealing plate interlayer from both sides of the detection area, and then flows along the sealing plate interlayer to the two streams of water collide near the flow limiting area. One part enters the detection area and has a cleaning effect on the detection area, and the other part flows to the cleaning liquid outlet under the action of gravity. The dynamic pressure of the sealing plate interlayer directly impacted by the jet body is low. This is because the water already existing in this area is in a low-speed motion state due to the impact. There is no significant difference in the cleaning effect of the sealing plate interlayer of these three working conditions, but it is significantly better than the first two working conditions. Considering the cleaning effects of the five working conditions, working condition three, that is, the angle between the two cleaning pipes is 0°, the spacing is 30mm, and the distance between the jet nozzle and the sealing plate is 6mm, is selected as the optimal working condition.

[0101] 3. Analysis of cleaning effect of sealing plate detection area

[0102] 3.1 Effect of cleaning tube diameter

[0103] Based on the influence of the position of the double cleaning pipes on the sealing plate cleaning system, the dynamic pressure distribution on the sealing plate has been improved. The cleaning effect of the sealing plate detection area is directly related to the accuracy of the device measurement results. The optimal working condition is selected to analyze the influence of the cleaning pipe diameter on the cleaning of the sealing plate detection area. The diameter of the cleaning pipe in the original working condition is 10mm, and the diameters of the modified working condition are 12mm, 14mm and 16mm respectively. Other parameters are consistent with the original working condition.

[0104] Figure 7The figure is the dynamic pressure distribution cloud map of the sealing plate detection area. It can be found that as the diameter of the cleaning pipe increases, the dynamic pressure cloud map of the sealing plate detection area presents a similar distribution law. The two jets collide with the sealing plate to form a symmetrical dynamic pressure field, and the dynamic pressure near the center of the dynamic pressure field is higher. As the diameter increases, the low dynamic pressure area at the edge of the sealing plate detection area shows a decreasing trend. This is because the flow rate increases, the water jet energy and its contact area with the sealing plate detection area increase. Considering the cleaning effects of the four working conditions, the cleaning pipe diameter of 16mm is selected as the optimal working condition.

[0105] 3.2 Effect of jet velocity

[0106] By analyzing the influence of the cleaning pipe diameter on the cleaning effect of the sealing plate detection area, the average dynamic pressure on the sealing plate detection area increases, but there is a small area with low dynamic pressure on its edge, which affects the cleaning effect. In order to eliminate this low dynamic pressure area and enhance the flushing effect of the water jet on the aerosol adhering to the sealing plate, the diameter of the cleaning pipe under the optimal working condition is 16mm, and the influence of the water jet speed on the cleaning of the sealing plate detection area is deeply analyzed. The water jet speed in the original working condition is 3m / s, and the speeds of the three modified working conditions are 4m / s, 5m / s and 6m / s respectively. The other parameters are consistent with the original working condition.

[0107] Figure 8 The figure is a cloud diagram of the dynamic pressure distribution in the sealing plate detection area. It can be seen that as the water jet velocity increases, the average dynamic pressure in the sealing plate detection area increases. This is because the energy carried by the water jet increases. At the same time, the low dynamic pressure area at the edge of the sealing plate detection area decreases. This should be due to the enhanced diffusion ability of the water jet on the sealing plate. Considering the cleaning effects of the four working conditions, the water jet velocity of 6m / s is selected as the optimal working condition.

[0108] 3.3 Effect of gas volume fraction

[0109] By increasing the water jet velocity, the average dynamic pressure on the sealing plate detection area is significantly increased, and the effect of the gas volume fraction on the cleaning effect of the embodiment of the present invention is analyzed. Shi Fengxia et al. and Li Chunjie et al. analyzed that the gas volume fraction of about 8% in the cleaning water will increase the jet cleaning area and enhance the impact of the jet on the target surface. Therefore, the optimal working condition water jet velocity of 6m / s is selected to deeply analyze the effect of the gas volume fraction on the cleaning of the sealing plate detection area. The jet medium in the original working condition is pure water, and the gas volume fractions of the three modified working conditions are 5%, 8% and 11% respectively. The other parameters are consistent with the original working condition.

[0110] Fig. 9It is a cloud map of the dynamic pressure distribution in the sealing plate detection area. It can be found from the cloud map that as the gas volume fraction in the water jet increases, the high dynamic pressure area in the sealing plate detection area tends to decrease, while the low dynamic pressure area at the edge of the detection area does not change significantly. This cleaning effect is somewhat different from the cleaning effect in the literature. This may be due to the large difference in jet speed. The jet speed in the prior art is usually around 200m / s, while the speed in the embodiment of the present invention is only 6m / s, and the gas cannot play a role. Taking into account the cleaning effects of the four working conditions, the pure water condition is selected as the optimal condition.

[0111] 4. Influence of the working state of the cleaning pipe

[0112] Through the analysis of the cleaning characteristics of the sealing plate detection area, the dynamic pressure of the sealing plate detection area increases, which is conducive to destroying the adhered aerosol structure and improving the cleaning efficiency. However, there are still some areas at the edge of the detection area with low dynamic pressure, and the analysis does not take into account the cleaning effect of the sealing plate interlayer. In order to simplify the structure of the device, the present invention does not adopt the method of adding an additional cleaning pipe, but optimizes the cleaning effect of the sealing plate by changing the working state of the two cleaning pipes. In the final optimized working condition, the two cleaning pipes work at the same time, and only one cleaning pipe is allowed to work in each working condition.

[0113] Fig.10 The figure is the distribution cloud diagram of the dynamic pressure of the upper sealing plate. It can be seen that when the two cleaning pipes work at the same time, the two jets interfere with each other, and the dynamic pressure distribution of the sealing plate is poor. Specifically, for the sealing plate detection area, there is a small part of the low dynamic pressure area along the flow direction of the jet body; for the sealing plate interlayer, the dynamic pressure of the area directly impacted by the jet body is low, and this part of the area occupies about one-third of the area of ​​the entire interlayer. When only the left cleaning pipe is opened, for the sealing plate detection area, the regional dynamic pressure along the flow direction of the jet body increases, because a single stream of water can be fully developed. However, due to the limited radiation range of a single stream of water, an area with low dynamic pressure appears on the right side of the detection area. For the sealing plate interlayer, the right half of the interlayer is effectively cleaned, while the left half of the interlayer has a low dynamic pressure area, because most of the high-speed water flow entering the sealing plate interlayer flows to the right half of the interlayer. When only the right cleaning pipe is opened, since the two pipes are in a symmetrical position, the cleaning effect of the entire sealing plate is opposite to that of opening only the left cleaning pipe. The cleaning effects of the three working conditions are summarized and it is found that the superposition of the cleaning effects of the two single cleaning pipe working conditions can basically achieve effective cleaning of the entire sealing plate. Therefore, when the sealing plate cleaning system is working, the cleaning method of alternately opening the two cleaning pipes is adopted.

[0114] 5. Summary

[0115] The embodiment of the present invention adopts a computer numerical simulation method, based on the optimal purge system structure, and deeply analyzes the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system, and obtains the following conclusions:

[0116] (1) In the analysis of the distance between the jet nozzle and the sealing plate, it was found that for the sealing plate detection area, as the distance increases, the collision between the jet and the sealing plate detection area weakens and the diffusion is limited, the cleaning dynamic pressure and area are reduced, and the cleaning effect becomes worse. For the sealing plate interlayer, when the distance is 6mm, more high-speed water flows into the sealing plate interlayer, and the cleaning effect is better. The optimal working condition is when the distance between the jet nozzle and the sealing plate is 6mm.

[0117] (2) In the analysis of the position of the double cleaning pipes, it was found that when the angle between the two cleaning pipes was 120° and 180°, the two jets interfered with each other, could not fully develop and had a lot of energy loss. The cleaning dynamic pressure at the edge of the sealing plate detection area and near its center was low, and most of the sealing plate interlayer area was not effectively cleaned. When the angle between the two cleaning pipes was 0°, the spacing was 30mm, and the distance between the jet nozzle and the sealing plate was 6mm, the cleaning area and dynamic pressure on the sealing plate increased significantly, and the cleaning effect was greatly improved. Subsequently, changing the distance between the jet nozzle and the sealing plate and the spacing between the two cleaning pipes had no obvious effect.

[0118] (3) In the analysis of the sealing plate detection area, it was found that as the diameter of the cleaning pipe increases, the water jet flow rate increases, the energy carried and the contact area with the detection area increase, the dynamic pressure distribution becomes better, and the optimal working condition is a cleaning pipe diameter of 16mm. As the water jet speed increases, the water jet energy increases, the scouring effect on the sealing plate is enhanced, and the optimal working condition is a water jet speed of 6m / s.

[0119] (4) In the analysis of the working status of the cleaning pipes, it was found that when the two cleaning pipes were working at the same time, the two jets interfered with each other and the dynamic pressure distribution of the sealing plate was poor. When only the left cleaning pipe was opened, the single jet could fully develop, and the dynamic pressure of the sealing plate detection area along the flow direction of the jet body increased. However, due to the limited radiation range of the single water flow, there were still some areas with lower dynamic pressure in the detection area. Most of the water flow entering the sealing plate interlayer flowed to the right half of the interlayer, and the left half of the interlayer was not effectively cleaned. When only the right cleaning pipe was opened, the cleaning effect of the entire sealing plate was opposite to that of only opening the left cleaning pipe. Combining the cleaning effects of the three working conditions, it was found that the superposition of the cleaning effects of the two single cleaning pipe working conditions can basically achieve effective cleaning of the entire sealing plate. Therefore, when the sealing plate cleaning system is working, it is recommended to adopt the cleaning method of alternately opening the two cleaning pipes.

[0120] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0121] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A control method for a radiation online cleaning device, characterized in that: The control method of the radiation online cleaning device includes: By using computer numerical simulation method and taking the optimal purge system structure as the basis, the influence of the distance between the jet nozzle and the sealing plate, the position of the double cleaning pipes, the cleaning pipe diameter, the water jet velocity, the gas volume fraction and the working state of the cleaning pipe on the performance of the sealing plate cleaning system is analyzed to realize the control of the radiation online cleaning device. Among them, for the entire radiation online cleaning device, the influencing factors include the distance between the jet nozzle and the sealing plate and the position of the double cleaning pipes; for the sealing plate detection area, the influencing factors include the cleaning pipe diameter, water jet velocity and gas volume fraction; for the sealing plate low dynamic pressure area, the influencing factor is the working state of the cleaning pipe; The control method of the radiation online cleaning device comprises the following steps: Step 1: Analyze the influence of the distance between the jet nozzle and the sealing plate to determine the optimal distance; Step 2: Analyze the influence of the position of the double cleaning pipes and determine the optimal working condition; Step 3: Analyze the influence of different factors on the cleaning effect of the sealing plate detection area; Step 4: Analyze the influence of the working state of the cleaning pipe and determine the cleaning method; In step 2, it is determined that the angle between the two cleaning pipes is 0° and the spacing is 30 mm, which is the optimal working condition; In the step 4, a cleaning method of alternately opening the two cleaning pipes is adopted; The radiation online cleaning device includes: a sealing plate cleaning pipe, a cleaning liquid outlet pipe, a circulation pool and a sealing plate; wherein the cleaning liquid outlet pipe is a feed liquid inlet pipe; the top wall of the circulation pool is a sealing plate detection area; the upper wall of the sealing plate interlayer and the sealing plate detection area constitute an upper sealing plate, and the lower wall of the sealing plate interlayer is a lower sealing plate; the angle between the sealing plate cleaning pipe and the horizontal plane is 30°.

2. The control method of the radiation online cleaning device according to claim 1, characterized in that: In the step 1, it is determined that the distance between the jet nozzle and the sealing plate is 6 mm as the optimal distance.

3. The control method of the radiation online cleaning device according to claim 1, characterized in that: The factors in step three include cleaning tube diameter, jet velocity and gas volume fraction; a cleaning tube diameter of 16 mm, a water jet velocity of 6 m / s and pure water working conditions are selected as the optimal working conditions.

4. A control system for a radiation online cleaning device implementing the control method for a radiation online cleaning device according to any one of claims 1 to 3, characterized in that: The control system of the radiation online cleaning device includes: The optimal distance determination module is used to analyze the influence of the distance between the jet nozzle and the sealing plate and determine the optimal distance; The optimal working condition determination module is used to analyze the influence of the dual cleaning pipe positions and determine the optimal working condition; The cleaning method determination module is used to analyze the impact of different factors on the cleaning effect of the sealing plate detection area; analyze the impact of the working state of the cleaning tube and determine the cleaning method.

5. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the control method of the radiation online cleaning device according to any one of claims 1 to 3.

6. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the control method of the radiation online cleaning device according to any one of claims 1 to 3.

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