Liquid level control device of self-shielding electron accelerator

Abstract

The utility model discloses a liquid level control device of a self-shielding electron accelerator, which relates to the technical field of electron accelerators and comprises a water outlet tank, a plurality of liquid level sensors, an under-beam irradiation reactor and a control system. A water inlet of the under-beam irradiation reactor is connected with a water inlet pipe for inputting wastewater, a water inlet pump and a water inlet flowmeter are arranged on the water inlet pipe, a water outlet of the water outlet tank is connected with a water outlet pipe for outputting wastewater, and a water outlet pump and a water outlet flowmeter are arranged on the water outlet pipe; wastewater sequentially flows through the under-beam irradiation reactor and the water outlet tank, the plurality of liquid level sensors are arranged at different heights of the water outlet tank, and the liquid level sensors are respectively connected with the control system. By designing the positions of the liquid level sensors and collecting liquid level signals, water outlet flow and other information, the flow speed of the water outlet pump is controlled, and frequent starting and stopping of the water outlet pump are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of electron accelerators, and in particular relates to a liquid level control device for a self-shielding electron accelerator. Background Art

[0002] The application of electron accelerators in the field of environmental protection mainly includes two scenarios: engineering application and pilot application. The application of electron beam accelerators in environmental protection projects requires the construction of a shielding body. The outlet water needs a water tank in the shielding body as a transfer to store the irradiated wastewater to prevent radiation leakage. The wastewater in the water tank flows into the EB outlet pool by gravity for subsequent process treatment. The equipment used in the pilot test is a vehicle-mounted accelerator. The outlet water tank is only 80cm×30cm×50cm in size. Because the inlet flow rate is fixed, the outlet water tank is filled with wastewater in 3~4 minutes. The outlet pump needs to be manually turned on for drainage. The inlet flow rate will decrease as the liquid level in the inlet bucket decreases and increase as it rises. It is necessary to manually adjust the inlet flow rate and turn on the outlet pump to prevent wastewater from overflowing, resulting in frequent manual operations and laborious work.

[0003] Patent number: CN117091673A, a counterweight type liquid level measurement system provides a liquid level detection system that can well meet the needs of small-volume containers in smart home appliances for liquid level detection systems. However, this patent is only for small-volume containers in smart home appliances, where the water quality is relatively clean and stable, and cannot meet the requirements of environmental protection pilot projects.

[0004] Patent number: CN117677132A, server, liquid level control device, computing equipment and liquid level control method use floating device to switch the first detection circuit or the second detection circuit between the on state and the off state with the rise and fall of the liquid cooling medium in the cavity, so as to solve the problem of the liquid level of the cooling medium being too high or too low. However, the floating device of this patent is placed in the liquid, and the environmental water quality is acidic or alkaline, which is easy to cause damage to the floating device, thereby causing damage to the circuit, making the entire device invalid and affecting the use effect.

[0005] The patent number is: CN 113410094 B. A float liquid level control switch adjusts the magnetic force through an adjustable magnetic structure to achieve an expansion of the water level control range and more accurate liquid level control. The control end and the electrical end are remotely isolated through a retractable sleeve rod, which can not only expand the water level control range, but also avoid failures caused by damage to the electrical end by liquid media. In addition, a potentiometer is used to quantify the liquid level, achieving more accurate liquid level control. However, this patent has certain requirements for installation space and installation position. The space of the vehicle accelerator is limited, so it is difficult to apply this control switch.

[0006] Patent number: CN117251000B, liquid level control method, system, device and medium adjust the water flow rate by comparing the difference between the equivalent liquid level and the preset liquid level range, so as to control the stability of the liquid level. The vehicle accelerator needs to form a water curtain, which requires a certain limit on the amount of water inlet, and the water inlet and outlet collection modules in the control method described in this patent are all set in the solution.

[0007] Existing liquid level control equipment and methods mostly use pressure sensors, liquid level floats, liquid level sensors, etc., which are mostly placed in water for signal transmission, and are targeted at large-volume pools or engineering projects. The mobile fully self-shielded electron accelerator is mostly used for industrial wastewater, and the outlet water tank is relatively small. The wastewater has complex components and is acidic or alkaline. A large amount of foam may form after the intermediate water tank in the irradiation room, affecting the judgment and accuracy of pressure sensors, liquid level sensors and other equipment. Due to the fluctuation of the inlet water volume, the liquid level changes greatly, resulting in frequent start and stop of the outlet water pump, which damages the water pump.

[0008] Therefore, how to solve the deficiencies in the above-mentioned prior art has become a topic to be studied and solved in this application. Utility Model Content

[0009] In view of this, an object of the utility model is to provide a liquid level control device for a self-shielding electron accelerator.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A self-shielded electron accelerator liquid level control device comprises a water outlet tank, a plurality of liquid level sensors, an under-beam irradiation reactor and a control system; the water outlet of the under-beam irradiation reactor is connected to the water inlet of the water outlet tank;

[0012] The water inlet of the beam irradiation reactor is connected to an inlet pipe for inputting wastewater, and the inlet pipe is provided with an inlet pump and an inlet flow meter; the water outlet of the outlet water tank is connected to an outlet pipe for outputting wastewater, and the outlet pipe is provided with an outlet pump and an outlet flow meter; the wastewater flows through the beam irradiation reactor and the outlet water tank in sequence;

[0013] A plurality of liquid level sensors are arranged at different heights of the water outlet tank, and each of the liquid level sensors is respectively connected to the control system; the control system is connected to the water inlet pump, the water inlet flow meter, the water outlet pump and the water outlet flow meter.

[0014] Furthermore, three liquid level sensors for detecting the water level of the water outlet tank are arranged from top to bottom on the side wall of the water outlet tank.

[0015] Furthermore, the three liquid level sensors include a high liquid level sensor, a middle liquid level sensor and a low liquid level sensor which are arranged in sequence from top to bottom;

[0016] The high liquid level sensor, the middle liquid level sensor and the low liquid level sensor are all connected to the water outlet pump through the control system.

[0017] Furthermore, the control system is provided with a water inlet flow rate, the water inlet flow meter displays the actual water inlet flow rate, and the control system adjusts the water inlet pump by comparing the difference between the actual water inlet flow rate and the water inlet flow rate.

[0018] Furthermore, when the actual water inlet flow rate is greater than the water inlet flow rate, the control system controls the frequency converter of the water inlet pump to reduce the speed; when the actual water inlet flow rate is less than the water inlet flow rate, the control system controls the frequency converter of the water inlet pump to increase the speed.

[0019] Furthermore, the control system is provided with a water outlet flow rate, the water outlet flow meter displays the actual water outlet flow rate, and the control system adjusts the water outlet pump by comparing the difference between the actual water outlet flow rate and the water outlet flow rate.

[0020] Further, the actual water outflow rate is equal to the water outflow rate, that is, when the liquid level in the water outflow tank reaches the middle liquid level sensor, the control system controls the inverter speed of the water outflow pump to remain unchanged;

[0021] When the actual water outlet flow rate is less than the water outlet flow rate, that is, when the liquid level in the water outlet tank reaches the high liquid level sensor, the control system controls the frequency converter of the water outlet pump to increase the speed;

[0022] When the actual water outlet flow rate is greater than the water outlet flow rate, that is, when the liquid level in the water outlet tank reaches the low liquid level sensor, the control system controls the frequency converter of the water outlet pump to reduce the rotation speed.

[0023] Furthermore, each of the liquid level sensors is a contactless liquid level sensor.

[0024] Compared with the prior art, the advantages of the utility model are: by setting a contactless liquid level sensor, the problems of the liquid level sensor being easily corroded in wastewater and the accuracy of the liquid level sensor being affected by foam are solved, thereby increasing the service life of the liquid level sensor and the accuracy of detection; by designing the position of each liquid level sensor, collecting information such as liquid level signals and water outlet flow, the flow rate of the water outlet pump is controlled to avoid frequent starting and stopping of the water outlet pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0027] Reference numerals and component descriptions in the drawings:

[0028] 1. Outlet water tank; 2. Under-beam irradiation reactor; 3. Inlet pipe; 4. Inlet pump; 5. Inlet flow meter; 6. Outlet pipe; 7. Outlet pump; 8. Outlet flow meter; 9. High liquid level sensor; 10. Middle liquid level sensor; 11. Low liquid level sensor. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be clearly and completely described below through specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See attached Figure 1As shown, a self-shielded electron accelerator liquid level control device of the present application includes a water outlet tank 1, a plurality of liquid level sensors, an under-beam irradiation reactor 2 and a control system. The water outlet tank 1 is arranged below the under-beam irradiation reactor 2. The under-beam irradiation reactor 2 is used to treat wastewater with electron beams to inactivate bacteria in the wastewater. The water outlet tank 1 is used to store irradiated wastewater to prevent radiation leakage. The water outlet of the under-beam irradiation reactor 2 is connected to the water inlet of the water outlet tank 1. The water inlet of the under-beam irradiation reactor 2 is connected to an inlet pipe 3 for inputting wastewater. The inlet pipe 3 is equipped with an inlet pump 4 for controlling the flow rate of the inlet water flow, and an inlet flow meter 5 for monitoring the flow rate of the inlet water flow. The water outlet of the water outlet tank 1 is connected to an outlet pipe 6 for outputting wastewater. The outlet pipe 6 is equipped with an outlet pump 7 for controlling the flow rate of the outlet water flow, and an outlet flow meter 8 for monitoring the flow rate of the outlet water flow. The wastewater flows into the beam irradiation reactor 2 from the water inlet of the beam irradiation reactor 2 through the water inlet pipe 3, and after irradiation treatment, flows from the water outlet of the beam irradiation reactor 2 to the water inlet of the outlet water tank 1, and finally flows out to the outlet pipe 6 through the water outlet of the outlet water tank 1. The inlet pump 4, the inlet flow meter 5, the outlet pump 7 and the outlet flow meter 8 are all connected to the control system, which can control the frequency converter of the inlet pump 4 and the frequency converter of the outlet pump 7, and can detect the water flow displayed on the inlet flow meter 5 and the outlet flow meter 8.

[0031] Among them, three liquid level sensors are arranged from top to bottom on the side wall of the water outlet tank 1 to detect the water level inside the water outlet tank 1. The three liquid level sensors include a high liquid level sensor 9, a middle liquid level sensor 10 and a low liquid level sensor 11 arranged in sequence from top to bottom, and the high liquid level sensor 9, the middle liquid level sensor 10 and the low liquid level sensor 11 are all connected to the water outlet pump 7 through a control system.

[0032] The control system is provided with an inlet flow rate, and the inlet flow meter 5 will display the actual inlet flow rate. When the actual inlet flow rate changes significantly due to the drop or rise of the liquid level in the inlet pool or the inlet bucket, the control system adjusts the inlet pump 4 by comparing the difference between the actual inlet flow rate and the set inlet flow rate. When the actual inlet flow rate is greater than the set inlet flow rate, the control system will control the inverter of the inlet pump 4 to reduce the speed and thus reduce the flow rate. When the actual inlet flow rate is less than the set inlet flow rate, the control system will control the inverter of the inlet pump 4 to increase the speed and thus increase the flow rate.

[0033] The control system is provided with a water outlet flow rate, and the actual water outlet flow rate will be displayed on the water outlet flow meter 8. The control system adjusts the water outlet pump 7 by comparing the difference between the actual water outlet flow rate and the set water outlet flow rate. When the liquid level in the water outlet tank 1 reaches the position of the middle liquid level sensor 10, the control system controls the inverter speed of the water outlet pump 7 to remain unchanged, and the actual water outlet flow rate is the same as the set water outlet flow rate, so as to keep the liquid level stable. When the actual water inlet flow rate fluctuates, when the liquid level in the water outlet tank 1 rises and reaches the high liquid level sensor 9, the control system controls the inverter of the water outlet pump 7 to increase the speed and accelerate the drainage. When the liquid level in the water outlet tank 1 drops and reaches the low liquid level sensor 11, the control system controls the inverter of the water outlet pump 7 to reduce the speed and reduce the drainage. The present application controls the speed of the water outlet pump 7 to change the liquid level height through three liquid level sensors at different heights, and at the same time avoids the frequent start and stop of the water outlet pump 7 from damaging the water outlet pump 7.

[0034] Preferably, each liquid level sensor in this embodiment is a contactless liquid level sensor, which has a long service life, thereby increasing the accuracy of detection. As an implementable method, a float level gauge, a pressure sensor, a common liquid level sensor, etc. can also be used, which only affects the service life and accuracy, but can also achieve the function of this application.

[0035] The above description of the disclosed embodiments enables professionals in the field to implement or use the utility model. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A self-shielded electron accelerator liquid level control device, characterized in that: It includes a water outlet tank, a plurality of liquid level sensors, an under-beam irradiation reactor and a control system; the water outlet of the under-beam irradiation reactor is connected with the water inlet of the water outlet tank; The water inlet of the beam irradiation reactor is connected to an inlet pipe for inputting wastewater, and the inlet pipe is provided with an inlet pump and an inlet flow meter; the water outlet of the outlet water tank is connected to an outlet pipe for outputting wastewater, and the outlet pipe is provided with an outlet pump and an outlet flow meter; the wastewater flows through the beam irradiation reactor and the outlet water tank in sequence; A plurality of liquid level sensors are arranged at different heights of the water outlet tank, and each of the liquid level sensors is respectively connected to the control system; the control system is connected to the water inlet pump, the water inlet flow meter, the water outlet pump and the water outlet flow meter.

2. A self-shielded electron accelerator liquid level control device according to claim 1, characterized in that: The side wall of the water outlet tank is provided with three liquid level sensors arranged from top to bottom for detecting the water level of the water outlet tank.

3. A self-shielded electron accelerator liquid level control device according to claim 2, characterized in that: The three liquid level sensors include a high liquid level sensor, a middle liquid level sensor and a low liquid level sensor which are arranged in sequence from top to bottom; The high liquid level sensor, the middle liquid level sensor and the low liquid level sensor are all connected to the water outlet pump through the control system.

4. A self-shielded electron accelerator liquid level control device according to claim 1, characterized in that: The control system is provided with an inlet flow rate, and the inlet flow meter displays the actual inlet flow rate. The control system adjusts the inlet pump by comparing the difference between the actual inlet flow rate and the inlet flow rate.

5. A self-shielded electron accelerator liquid level control device according to claim 4, characterized in that: When the actual water inlet flow rate is greater than the water inlet flow rate, the control system controls the frequency converter of the water inlet pump to reduce the speed; when the actual water inlet flow rate is less than the water inlet flow rate, the control system controls the frequency converter of the water inlet pump to increase the speed.

6. A self-shielded electron accelerator liquid level control device according to claim 3, characterized in that: The control system is provided with a water outlet flow rate, and the water outlet flow meter displays the actual water outlet flow rate. The control system adjusts the water outlet pump by comparing the difference between the actual water outlet flow rate and the water outlet flow rate.

7. A self-shielded electron accelerator liquid level control device according to claim 6, characterized in that: The actual water outflow rate is equal to the water outflow rate, that is, when the liquid level in the water outflow tank reaches the middle liquid level sensor, the control system controls the inverter speed of the water outflow pump to remain unchanged; When the actual water outlet flow rate is less than the water outlet flow rate, that is, when the liquid level in the water outlet tank reaches the high liquid level sensor, the control system controls the frequency converter of the water outlet pump to increase the speed; When the actual water outlet flow rate is greater than the water outlet flow rate, that is, when the liquid level in the water outlet tank reaches the low liquid level sensor, the control system controls the frequency converter of the water outlet pump to reduce the rotation speed.

8. The liquid level control device for a self-shielded electron accelerator according to claim 1, characterized in that: Each of the liquid level sensors is a contactless liquid level sensor.

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