Automatic sampling and detecting device for decay tank

Abstract

The utility model relates to the technical field of decay pools, and provides an automatic sampling and detecting device for a decay pool, which comprises a pump body, a decay pool, a first electromagnetic valve, a sampling pool, an upper computer, a control mainboard and an activity concentration detector, the sampling pool, the first pipeline, the pump body, the second pipeline and the decay pool are in fluid communication in sequence, the second pipeline is provided with the first electromagnetic valve, the activity concentration detector is installed in the sampling pool, and the pump body, the first electromagnetic valve and the activity concentration detector are all electrically connected with the control mainboard. And the control mainboard is in communication connection with the upper computer. Compared with a manual detection mode, the detection efficiency can be improved, and the safety of the whole detection process can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of decay tank especially, relates to a decay tank automatic sampling detection device. BACKGROUND

[0002] With nuclear medicine application more and more widely, the country pays more and more attention to environmental protection, and the environmental protection department is more and more strict to radioactive waste liquid discharge requirement, must handle corresponding radioactive waste liquid and then discharge, and the decay tank is produced in such background, and the traditional discharge is not handled, directly discharged to the environment, and the natural environment and human produce radioactive hazard, and the decay tank can store radioactive waste liquid to reduce the radioactivity of waste water by storage decay method, and when reaching a certain time radiation decay is insufficient to constitute harm, then the waste liquid is discharged safely. UTILITY MODEL CONTENTS

[0003] The utility model provides a kind of decay tank automatic sampling detection device to solve the problems of time-consuming, laborious and low efficiency of artificial detection radioactive waste liquid in prior art.

[0004] The utility model provides a kind of decay tank automatic sampling detection device, comprising: pump body, decay tank, first electromagnetic valve, sampling pool, host computer, control mainboard and activity concentration detector;

[0005] The sampling pool, first pipeline, the pump body, second pipeline and the decay tank are sequentially and fluidly connected, the second pipeline is installed with the first electromagnetic valve, the activity concentration detector is installed in the sampling pool, the pump body, the first electromagnetic valve, the activity concentration detector are electrically connected with the control mainboard, and the control mainboard is connected with the host computer.

[0006] According to the utility model provides a kind of decay tank automatic sampling detection device, the quantity of the decay tank is multiple, and each decay tank is fluidly connected with the pump body by corresponding second pipeline.

[0007] According to the utility model provides a kind of decay tank automatic sampling detection device, the decay tank automatic sampling detection device further includes level meter, the level meter is installed in the decay tank, and the level meter is electrically connected with the control mainboard.

[0008] According to the utility model provides a kind of decay tank automatic sampling detection device, the control mainboard is provided with timer.

[0009] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0010] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0011] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0012] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0013] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0014] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

[0015] The decay tank automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the utility model or prior art, the following will be to the embodiment or prior art description needed to use a simple introduction to the drawings, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0017] Figure 1 It is the structure schematic diagram of the decay tank automatic sampling detection device provided by the utility model.

[0018] Figure label:

[0019] 1. Host computer; 2. Control motherboard; 3. Sampling cell; 4. Activity concentration detector; 5. First pipeline; 6. Pump body; 7. First solenoid valve; 8. Second pipeline; 9. Decay cell; 10. Level gauge; 11. Second solenoid valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] The following is combined with Figure 1 This invention describes an automatic sampling and detection device for decay cells.

[0022] like Figure 1 As shown, the automatic sampling and detection device for decay cells according to this embodiment of the present invention includes: a pump body 6, a decay cell 9, a first solenoid valve 7, a sampling cell 3, a host computer 1, a control motherboard 2, and an activity concentration detector 4. The control motherboard 2 can be a PLC controller, and the PLC controller model can be a Simens S7200 smart.

[0023] Specifically, the sampling pool 3, the first pipeline 5, the pump body 6, the second pipeline 8, and the decay pool 9 are connected in sequence. The second pipeline 8 is equipped with a first solenoid valve 7. The activity concentration detector 4 is installed in the sampling pool 3 and is used to detect the radioactive activity concentration of the radioactive waste liquid in the sampling pool 3.

[0024] Activity concentration is an important concept in radiation medicine and protection, representing the radioactivity per unit volume. The unit is becquerel per cubic meter (Bq / m³) or becquerel per liter (Bq / L). The activity concentration detector 4 uses specific detection principles, such as scintillator detectors and photomultiplier tubes, to convert the radiation emitted by radioactive materials into electrical signals for measurement. The scintillator at the top of the detector consists of alpha and beta scintillator materials pressed onto an acrylic glass plate. When alpha particles and beta rays enter the scintillator material, all energy is lost, causing scintillation. The scintillation photons are received by the photomultiplier tube and converted into electrical signals, which are then recorded. Furthermore, according to DB44 / 26-2001 "Limits for Water Pollutant Discharge," the maximum allowable discharge concentration for Class I pollutants is: total alpha ≤ 1.0 Bq / L, total beta ≤ 10 Bq / L.

[0025] In addition, the pump body 6, the first electromagnetic valve 7 and the activity concentration detector 4 are electrically connected with the control mainboard 2, and the control mainboard 2 is in communication connection with the upper computer 1. Among them, the PLC controller controls the opening and closing of the pump body 6 by controlling the on-off of the contactor (KM1, KM2), and the model of the contactor is LC1D0910BD.

[0026] It should be noted that after the radioactive waste liquid in the decay tank 9 is stored for a period of time, the control mainboard 2 controls the first electromagnetic valve 7 and the pump body 6 to act according to the instruction of the upper computer 1, at this time, the radioactive waste liquid in the decay tank 9 can be extracted to the sampling tank 3, and at the same time, the activity concentration detector 4 can detect the radioactive waste liquid in the sampling tank 3 to obtain the radioactive activity concentration of the radioactive waste water, and the control mainboard 2 determines whether the radioactive activity concentration of the radioactive waste water meets the preset standard, and feeds back the detection result to the upper computer 1. Compared with the manual detection method, the detection efficiency can be improved and the safety of the whole detection process can be ensured.

[0027] In actual application, as shown in Figure 1 The number of decay tanks 9 is multiple, and each decay tank 9 is in fluid communication with the pump body 6 through a corresponding second pipeline 8. Exemplarily, the number of decay tanks 9 is three, and the three decay tanks 9 can be located at the same position or different positions. At this time, the number of second pipelines 8 is three, each decay tank 9 is in fluid communication with the pump body 6 through a corresponding second pipeline 8, and a corresponding first electromagnetic valve 7 is installed on each second pipeline 8.

[0028] It should be noted that the radioactive waste liquid in the three decay tanks 9 can be detected in turn, or the radioactive waste liquid in which decay tank 9 is detected is determined according to the storage time of the radioactive waste liquid in the three decay tanks 9.

[0029] Exemplarily, after the radioactive waste liquid in the first decay tank 9 is stored for a period of time, the control mainboard 2 controls the pump body 6 and the corresponding first electromagnetic valve 7 to act according to the instruction of the upper computer 1, at this time, the radioactive waste liquid in the first decay tank 9 can be extracted to the sampling tank 3, and at the same time, the activity concentration detector 4 can detect the radioactive waste liquid in the sampling tank 3 to obtain the radioactive activity concentration of the radioactive waste water, and the control mainboard 2 determines whether the radioactive activity concentration of the radioactive waste water meets the preset standard, and feeds back the detection result to the upper computer 1.

[0030] As shown in Figure 1 The decay tank automatic sampling and detection device further comprises a liquid level meter 10, the liquid level meter 10 is installed in the decay tank 9, and the liquid level meter 10 is electrically connected with the control mainboard 2.

[0031] Exemplarily, the liquid level meter 10 can be a pressure sensing liquid level meter and a radar liquid level meter. The pressure sensing liquid level meter, also known as a liquid level meter, a static pressure liquid level meter, a liquid level transmitter, a liquid level sensor or a water level sensor, is a device for measuring the liquid level based on the principle of liquid static pressure. The model of the radar liquid level meter (also known as a radar sensor, a radar detector, etc.) can be ZLEDIGI-DB. The radar liquid level meter is fixed above the liquid surface of the radioactive waste liquid in the decay tank 9. The radar liquid level meter adopts a "top-down" measurement method based on the time-of-flight principle to measure the distance between the reference point and the medium surface (i.e., the liquid surface). The antenna transmits a radar pulse signal. After the radar pulse signal is emitted from the medium surface, it becomes a radar pulse reflection signal. The radar pulse reflection signal is received by the antenna and transmitted to the microprocessor in the radar liquid level meter. The microprocessor analyzes the signal and identifies the true reflection echo of the radar pulse reflection signal on the medium surface and sends it to the PLC controller. The PLC controller calculates the liquid level.

[0032] In addition, the control mainboard 2 is provided with a timer. In actual use, the radar liquid level meter converts the radar pulse reflection signal into a linear signal and transmits it to the PLC controller through a signal transmission shielded cable. The PLC controller receives the linear signal and converts it into a liquid level value. When the liquid level in the decay tank 9 has reached the target liquid level, the timer starts timing the decay of the decay tank 9. After the timing time reaches the target time, the PLC controller controls the first electromagnetic valve 7 and the pump body 6 to act. At this time, the radioactive waste liquid in the decay tank 9 can be extracted to the sampling tank 3 for subsequent detection of the radioactivity concentration.

[0033] In actual application, the decay tank automatic sampling detection device further comprises an audible and visual alarm electrically connected with the control mainboard 2. The model of the audible and visual alarm is CB1-610R.

[0034] It should be noted that the control mainboard 2 can issue an alarm through the audible and visual alarm to remind the relevant operator when the radioactivity concentration of the radioactive waste water does not meet the preset standard.

[0035] In an optional embodiment, the sampling tank 3 comprises a box body and a cover body, the cover body is covered on the box body, and the cover body is provided with an openable and closable sampling port. The sampling tank 3 is a lead tank. The use of the lead tank can avoid the interference of the surrounding environment on the activity concentration detector 4, thereby improving the detection accuracy and reliability.

[0036] It should be noted that the convex part with external thread is arranged outside the sampling port, the sampling port is sealed by a sampling cover, the sampling cover is threadedly connected with the convex part, the sampling port can be opened and closed by rotating the sampling cover, and the sealing of the sampling cover can be realized by the rubber sealing gasket sleeved outside the convex part.

[0037] In actual application, the activity concentration detector 4 is installed on the side wall of the box body, and the probe of the activity concentration detector 4 extends towards the bottom wall of the box body. In this way, the maintenance and replacement of the activity concentration detector 4 can be facilitated when the cover body is removed.

[0038] In an optional embodiment, the bottom of the sampling pool 3 is provided with a first liquid discharge pipe, and a second electromagnetic valve 11 is installed on the first liquid discharge pipe and electrically connected with the control mainboard 2.

[0039] It should be noted that after the activity concentration detector 4 completes the detection of the radioactive waste liquid in the sampling pool 3, the control mainboard 2 can control the second electromagnetic valve 11 to open, at which time the radioactive waste liquid in the sampling pool 3 can be discharged to facilitate the next detection.

[0040] In an optional embodiment, the bottom of the decay pool 9 is provided with a second liquid discharge pipe, and a valve body is installed on the second liquid discharge pipe.

[0041] It should be noted that after the control mainboard 2 determines that the radioactive activity concentration of the radioactive waste water meets the preset standard, the valve body is opened, and the radioactive waste water in the decay pool 9 can be discharged through the second liquid discharge pipe to store the next batch of radioactive waste water in the decay pool 9.

[0042] Specifically, the valve body is a third electromagnetic valve, and the third electromagnetic valve is electrically connected with the control mainboard 2. After the control mainboard 2 determines that the radioactive activity concentration of the radioactive waste water meets the preset standard, the control mainboard 2 can control the third electromagnetic valve to open, and the radioactive waste water in the decay pool 9 is discharged through the second liquid discharge pipe.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A decay cell auto-sampling detection device, characterized by, The application relates to a decay cell automatic sampling detection device. The sampling cell, the first pipeline, the pump body, the second pipeline and the decay cell are sequentially in fluid connection, the first electromagnetic valve is arranged on the second pipeline, the activity concentration detector is arranged on the sampling cell, the pump body, the first electromagnetic valve and the activity concentration detector are electrically connected with the control mainboard, and the control mainboard is in communication connection with the upper computer. The number of the decay cells is plural, and each decay cell is in fluid connection with the pump body through a corresponding second pipeline.

2. The decay cell automated sampling detection apparatus of claim 1, wherein, The decay cell automatic sampling detection device further comprises a liquid level meter, the liquid level meter is arranged on the decay cell, and the liquid level meter is electrically connected with the control mainboard.

3. The decay cell automated sampling detection apparatus of claim 1, wherein, The control mainboard is provided with a timer.

4. The decay cell automated sampling detection apparatus of claim 3, wherein, The decay cell automatic sampling detection device further comprises an audible and visual alarm, and the audible and visual alarm is electrically connected with the control mainboard.

5. The decay cell automated sampling detection apparatus of claim 1, wherein, The sampling cell comprises a box body and a cover body, the cover body covers the box body, and the cover body is provided with an openable and closable sampling port.

6. The decay cell automated sampling detection apparatus of claim 1, wherein, The activity concentration detector is arranged on the side wall of the box body, and the probe of the activity concentration detector extends towards the bottom wall of the box body.

7. The decay cell automated sampling detection apparatus of claim 6, wherein, The bottom of the sampling cell is provided with a first liquid discharge pipe, a second electromagnetic valve is arranged on the first liquid discharge pipe, and the second electromagnetic valve is electrically connected with the control mainboard.

8. The decay cell automated sampling detection apparatus of claim 1, wherein, The bottom of the decay cell is provided with a second liquid discharge pipe, and a valve body is arranged on the second liquid discharge pipe.

9. The decay cell automated sampling detection apparatus of claim 1, wherein, The valve body is a third electromagnetic valve, and the third electromagnetic valve is electrically connected with the control mainboard.

10. The decay cell automated sampling detection apparatus of claim 9, wherein, ​

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