Pneumatic sample feeding system for radioactive samples

Abstract

The invention provides a radioactive sample pneumatic sample feeding system which comprises a sample feeding pipeline, a cartridge clip matched with the sample feeding pipeline is arranged in the sample feeding pipeline, the interior of the cartridge clip is of a hollow structure used for containing a sample bottle, and the starting end of the sample feeding pipeline is connected with a gas supply device for providing compressed gas; a gas collecting branch pipe and a back flushing branch pipe are arranged at the receiving end of the sample conveying pipeline and are both communicated with the pressure box, and pressure relief pipelines are arranged at the starting end and the receiving end of the sample conveying pipeline; and a monitoring device is arranged on the sample conveying pipeline. According to the scheme, the cartridge clip matched with the inner diameter of the sample conveying pipeline is arranged in the sample conveying pipeline, and through coordinated control of the air supply device, the pressure box and the two pressure relief pipelines at the starting end and the receiving end of the sample conveying pipeline, the sample bottle filled with the sample to be detected is protectively conveyed by taking compressed air as power and taking the pipeline as a conveying path; during the period, the monitoring device is used for monitoring the position of the cartridge holder, so that the sample bottle is conveyed by the pneumatic sample conveying system, and the radioactive sample conveying safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive sample delivery, and in particular to a radioactive sample pneumatic delivery system. Background Art

[0002] In industrial fields and scientific research environments related to the treatment of radioactive materials, accurately obtaining radioactive samples and analyzing them is a crucial link. There are many problems with the traditional radioactive material sampling process. In the prior art, when sampling radioactive materials, the usual practice is to seal and remove the sample bag at the process sampling point, and then rely on manual handling or use a special transport vehicle to transport the sealed sample to the sampling bin of the analysis post. After that, it is necessary to use the sample transfer channel to further send it to the sample processing station. This traditional sampling method involves a lot of manpower input in the entire process. From the operation of the sampling point to the transportation link, and then to the processing of the sampling bin, it requires a dedicated person to be responsible, which consumes a lot of human resources. Moreover, this process has extremely high requirements on the professional skills and operating specifications of the personnel. The operators need to undergo rigorous training and be familiar with the complex operating procedures and safety specifications to ensure that every step is accurate.

[0003] However, even under strict operating requirements, due to the dangerousness of radioactive materials themselves, the process still has huge safety hazards. If you are not careful, such as when the bags are not sealed tightly, collisions during transportation, or poor connection of transfer channels, toxic and hazardous substances may leak. Once a leak occurs, radioactive contamination will spread rapidly, causing serious damage to the surrounding environment, equipment and personnel. This damage not only includes long-term threats to human health, such as various diseases caused by radiation, but also causes long-term radioactive contamination to the environment, affecting ecological balance and sustainable development. In addition, radioactive contamination may cause expensive equipment to be contaminated and unable to be used normally, resulting in huge economic losses. Therefore, there is an urgent need for a safer, more efficient and less manpower-dependent radioactive sample delivery system. Summary of the invention

[0004] The purpose of the present invention is to provide a pneumatic sample delivery system for radioactive samples to achieve protective delivery of radioactive samples.

[0005] The present invention provides a pneumatic sample delivery system for radioactive samples, comprising a sample delivery pipeline, wherein a clip adapted to the sample delivery pipeline is arranged inside the sample delivery pipeline, wherein the interior of the clip is a hollow structure for containing sample bottles, and a gas supply device for providing compressed gas is connected to the starting end of the sample delivery pipeline; a gas collecting branch pipe and a back-blowing branch pipe are respectively arranged at the receiving end of the sample delivery pipeline, wherein the gas collecting branch pipe and the back-blowing branch pipe are both connected to a pressure box, and a pressure relief pipeline is arranged at the starting end and the receiving end of the sample delivery pipeline; and a monitoring device is arranged on the sample delivery pipeline.

[0006] Furthermore, a first pressure relief pipeline is provided at the starting end of the sample delivery pipeline, and a first pressure relief valve is provided on the first pressure relief pipeline; a second pressure relief pipeline is provided at the receiving end of the sample delivery pipeline, and a second pressure relief valve is provided on the second pressure relief pipeline.

[0007] Furthermore, the monitoring device is a photoelectric sensor or an ultrasonic sensor.

[0008] Furthermore, the clip is a spherical, cylindrical or capsule-shaped structure.

[0009] Furthermore, the inner diameter of the sample delivery pipe is φ32 cm, and the maximum cross-sectional diameter of the clip is φ29 cm.

[0010] Furthermore, the radius of the curved portion of the sample delivery pipeline is not less than 1200 mm.

[0011] Furthermore, the gas collecting branch pipe, the back-blowing branch pipe and the pressure box are interconnected via an electromagnetic three-way valve.

[0012] Furthermore, the connection between the backflush branch pipe and the sample delivery pipe is a conical transition structure.

[0013] Furthermore, a pressure gauge is installed on the air inlet pipeline of the pressure box.

[0014] Furthermore, it also includes a controller, and the air supply device, the first pressure relief valve, the second pressure relief valve, the electromagnetic three-way valve and the pressure gauge are all electrically connected to the controller.

[0015] The beneficial effect of the technical solution is as follows: the solution arranges a clip adapted to the inner diameter of the sample delivery pipeline inside the solution, and through the coordinated control of the air supply device and the pressure box as well as the two pressure relief pipelines at the starting end and the receiving end of the sample delivery pipeline, the compressed air is used as the power, and the pipeline is used as the transmission path, so that the sample bottles containing the samples to be tested are protectively transported. During this period, the position of the clip is monitored by the monitoring device, and the sample bottles are transported by the pneumatic sample delivery system, which not only improves the transmission efficiency, but also improves the safety of radioactive sample transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Explanation of the accompanying drawings: 1-sample delivery pipeline, 2-clip, 3-gas supply device, 4-pressure box, 5-gas collecting branch pipe, 6-backblowing branch pipe, 7-first pressure relief pipeline, 8-first pressure relief valve, 9-second pressure relief pipeline, 10-second pressure relief valve, 11-electromagnetic three-way valve, 12-pressure gauge, 13-monitoring device. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1

[0023] like Figure 1As shown, the present invention provides a pneumatic sample delivery system for radioactive samples, including a sample delivery pipeline 1, wherein a clip 2 adapted thereto is disposed inside the sample delivery pipeline 1. Specifically, the clip 2 is a spherical, cylindrical or capsule-shaped structure, and the inside of the clip 2 is a hollow structure for containing sample bottles. The inner diameter of the sample delivery pipeline 1 is φ32 cm, and the maximum cross-sectional diameter of the clip 2 is φ29 cm. The length of the sample delivery pipeline 1 is designed to be 500-1200 meters. There is a contact sliding friction between the clip 2 and the inner wall of the sample delivery pipeline 1. In order to ensure To ensure the safety and durability of the clip 2, the clip 2 needs to be made of wear-resistant materials, and the inner wall of the sample delivery pipe 1 should be smooth enough. At the same time, in order to avoid collision and wear at the interface of the clip 2 when it runs at high speed, the concentricity of the pipe joint should be controlled; in order to ensure the smoothness of the sample bottle when turning and ensure the smoothness of the clip 2, on the one hand, the design of the bend in the sample delivery pipe 1 should be reduced as much as possible. If it is unavoidable, the minimum radius of the bend in the sample delivery pipe 1 can be designed to be 1200mm to avoid affecting the smoothness of the clip 2 running in the sample delivery pipe 1.

[0024] The starting end of the sample delivery pipeline 1 is connected to a gas supply device 3 for providing compressed gas, and the compressed gas provides the power for the magazine 2 to move forward; the receiving end of the sample delivery pipeline 1 is respectively provided with a gas collecting branch pipe 5 and a backblowing branch pipe 6, and the gas collecting branch pipe 5 and the backblowing branch pipe 6 are both connected to the pressure box 4, and the gas collecting branch pipe 5, the backblowing branch pipe 6 and the pressure box 4 are interconnected through an electromagnetic three-way valve 11. During the transmission process of the magazine 2, the gas collecting branch pipe 5 is first connected to the pressure box 4, and the gas at the rear end is collected by the pressure box 4 through the gas collecting branch pipe 5. The collected gas is used for the pressure box 4 to backblow and decelerate the magazine 2 through the backblowing branch pipe 6 in the later stage; a pressure gauge 12 is installed on the air inlet pipeline of the pressure box 4. When the pressure gauge 12 detects that the air pressure in the pressure box 4 reaches the rated value, the electromagnetic three-way valve 11 is adjusted to close the air port of the pressure box 4. When the magazine 2 is about to reach the receiving end, the electromagnetic three-way valve 11 is adjusted to connect the pressure box 4 with the backblowing branch pipe 6 to backblow and decelerate the magazine 2. The connection between the back-blowing branch pipe 6 and the sample delivery pipe 1 is a tapered transition structure (the pipe diameter gradually decreases from the sample delivery pipe 1 to the back-blowing branch pipe 6), which is used to expand the back-blowing airflow.

[0025] A first pressure relief pipeline 7 is provided at the starting end of the sample delivery pipeline 1 , and a first pressure relief valve 8 is provided on the first pressure relief pipeline 7 ; a second pressure relief pipeline 9 is provided at the receiving end of the sample delivery pipeline 1 , and a second pressure relief valve 10 is provided on the second pressure relief pipeline 9 .

[0026] A monitoring device 13 is provided on the sample delivery pipeline 1 for monitoring the passage of the magazine 2. The monitoring device 13 is a photoelectric sensor or an ultrasonic sensor. The monitoring device 13 needs to be installed at a suitable height on the sample delivery pipeline 1 so that sufficient dead volume is retained at the bottom of the receiving end of the sample delivery pipeline 1 for decelerating the magazine 2.

[0027] The system also includes a controller, and the air supply device 3, the first pressure relief valve 8, the second pressure relief valve 10, the electromagnetic three-way valve 11 and the pressure gauge 12 are all electrically connected to the controller, and the controller realizes coordinated control of the entire system.

[0028] How it works

[0029] In the initial stage, the gas supply device 3 is opened, the first pressure relief valve 8 is closed, and the second pressure relief valve 10 is opened. The compressed gas provides power for the clip 2. When the clip 2 is about to reach the receiving end, the monitoring device 13 detects that the clip 2 has passed and sends a signal to the controller. The compressed air stops supplying gas. The controller controls the closing of the second pressure relief valve 10 and the opening of the first pressure relief valve 8. The clip 2 continues to move forward by its original inertia. The volume of the receiving end of the sample delivery pipeline 1 will be continuously compressed. According to the ideal gas state equation,

[0030] PV = RT;

[0031] P-pressure, Pa; V-volume, m3; R-8.3145 J·mol -1 ·K -1 ; T-thermodynamic temperature, K; when V becomes smaller, P and T will increase to keep the two ends of the formula balanced, and in fact, the increase of P is more significant. When the pressure P at the receiving end is greater than the pressure at the sending end, the sample bottle begins to decelerate. As the pressure at the receiving end continues to increase, the speed of the clip 2 begins to decrease. At the same time, in order to improve the effect of rapid deceleration of the clip 2, the electromagnetic three-way valve 11 is controlled to connect the pressure box 4 and the backflush branch pipe 6. The compressed gas collected in the pressure box 4 is released by the backflush branch pipe 6, and the clip 2 is backflushed to obtain an ideal deceleration effect, ensuring that the sample bottle reaches the receiving end, and the speed drops below 0.2m / s, and the sample bottle is controlled to land safely to complete the sample reception.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pneumatic sample delivery system for radioactive samples, characterized in that: It includes a sample delivery pipeline, the interior of which is provided with a magazine adapted thereto, the interior of the magazine is a hollow structure for containing sample bottles, the starting end of the sample delivery pipeline is connected to a gas supply device for providing compressed gas; the receiving end of the sample delivery pipeline is respectively provided with a gas collecting branch pipe and a backblowing branch pipe, the gas collecting branch pipe and the backblowing branch pipe are both connected to a pressure box, the starting end and the receiving end of the sample delivery pipeline are both provided with pressure relief pipelines; the sample delivery pipeline is provided with a monitoring device.

2. The radioactive sample pneumatic delivery system according to claim 1, characterized in that: A first pressure relief pipeline is provided at the starting end of the sample delivery pipeline, and a first pressure relief valve is provided on the first pressure relief pipeline; a second pressure relief pipeline is provided at the receiving end of the sample delivery pipeline, and a second pressure relief valve is provided on the second pressure relief pipeline.

3. The radioactive sample pneumatic delivery system according to claim 1, characterized in that: The monitoring device is a photoelectric sensor or an ultrasonic sensor.

4. The radioactive sample pneumatic delivery system according to claim 1, characterized in that: The clip is a spherical, cylindrical or capsule-shaped structure.

5. The radioactive sample pneumatic delivery system according to claim 4, characterized in that: The inner diameter of the sample delivery pipeline is φ32 cm, and the maximum cross-sectional diameter of the clip is φ29 cm.

6. The radioactive sample pneumatic delivery system according to claim 1, characterized in that: The radius of the curved portion of the sample delivery pipeline is not less than 1200 mm.

7. The radioactive sample pneumatic delivery system according to claim 2, characterized in that: The gas collecting branch pipe, the back-blowing branch pipe and the pressure box are interconnected through an electromagnetic three-way valve.

8. The radioactive sample pneumatic delivery system according to claim 1, characterized in that: The connection between the backflush branch pipe and the sample delivery pipeline is a conical transition structure.

9. The radioactive sample pneumatic delivery system according to claim 7, characterized in that: A pressure gauge is installed on the air inlet pipeline of the pressure box.

10. The radioactive sample pneumatic delivery system according to claim 9, characterized in that: It also includes a controller, and the air supply device, the first pressure relief valve, the second pressure relief valve, the electromagnetic three-way valve and the pressure gauge are all electrically connected to the controller.

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