Collection device and method for radioactive slurry sample in tank body

Abstract

The invention belongs to the technical field of radiation environment monitoring, and particularly relates to a collecting device and method for radioactive slurry samples in a tank body, the device comprises a collecting end capable of extending into the tank body to collect the radioactive slurry samples, and the collecting end comprises a sample tank (2) and a one-way valve (3) arranged at a port of the bottom end of the sample tank (2). According to the collecting device and method, efficient, accurate and safe collection of the radioactive slurry sample in the tank body can be achieved, the stability and repeatability of a sampling result are ensured by matching with a collection program of standardized design, the sample collection program is simplified while it is ensured that sample collection has representativeness, the labor cost is reduced, and the working efficiency is improved. And the external irradiation dose of workers is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of radiation environment monitoring, and in particular relates to a device and method for collecting radioactive mud samples in a tank. Background Art

[0002] The collection of radioactive mud samples in tanks is a vital task, which is not only related to the assessment of environmental safety, but also directly affects the protection of public health and safety. In the existing technology, the collection of radioactive mud samples in tanks mainly relies on manual operation or simple mechanical devices. These devices often have problems such as low collection efficiency, high risk of sample contamination, and complex operation during the collection process. Therefore, it is difficult to ensure the integrity and representativeness of the samples, and the safety of operators is also at great risk. In addition, traditional sampling procedures often lack systematicity and standardization, resulting in instability and non-repeatability of sampling results. Especially when dealing with complex and changeable radioactive mud samples, the representativeness of sample collection cannot be ensured, which will affect the reliability of sample data to a certain extent. Therefore, it is necessary to improve and innovate the collection device and sampling procedure of radioactive mud samples in tanks. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a device and method. The device and method can improve the collection efficiency of radioactive mud samples, reduce the risk of sample contamination, and are easy to operate, and can ensure the integrity and representativeness of the samples, while reducing the safety risks of operators.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a device for collecting radioactive mud samples in a tank, which includes a collection end capable of extending into the target tank to collect radioactive mud samples, and the collection end includes a sample tank and a one-way valve arranged at a port at the bottom end of the sample tank.

[0005] Furthermore, the sample tank is cylindrical, with an opening at the bottom and a closed structure at the top.

[0006] Furthermore, the one-way valve is a mechanical one-way valve and is not equipped with a spring. One side of the one-way valve is movably connected to the inner wall of the sample tank and can be flipped open toward the inside of the sample tank, and the port at the bottom of the sample tank is blocked when reset.

[0007] Furthermore, a straight rod type connecting rod is provided on the outside of the top end of the sample tank, the bottom end of the connecting rod is connected to the outer surface of the top end of the sample tank via a thread, and the connecting rod is coaxial with the sample tank.

[0008] Furthermore, the connecting rod is composed of a plurality of connecting sections connected end to end; a threaded joint is provided at the tail end of the connecting section, an internal thread adapted to the threaded joint is provided at the top end of the connecting section, two adjacent connecting sections are connected via the threaded joint and the internal thread, and the threaded joint of the connecting section at the end of the connecting rod is used to connect the sample tank.

[0009] Furthermore, it also includes a first handle, which is used to connect with the top of the connecting section at the top of the connecting rod, and the sample tank can be driven to rotate along the axis through the first handle through the connecting rod.

[0010] Furthermore, it also includes a sampling hook for opening the one-way valve, the sampling hook includes a straight rod body and a U-shaped elbow arranged at the bottom end of the rod body, and a second handle is arranged at the top end of the rod body.

[0011] Furthermore, it also includes a sample container. After the sampling device completes the sampling, the radioactive mud sample in the sample tank is temporarily stored in the sample container.

[0012] Furthermore, it also includes a cleaning container. After the sampling device completes the sampling, the cleaning container is cleaned; the cleaning container is also used for temporarily storing the cleaning liquid.

[0013] Furthermore, the connecting rod, the sample tank and the one-way valve are all made of stainless steel.

[0014] To achieve the above object, the present invention also provides a method for collecting radioactive mud samples in a tank body using the collection device as described above, comprising the following steps:

[0015] Step S1, collection plan formulation,

[0016] Step S2, sample collection process,

[0017] Step S3, sample packaging process.

[0018] Furthermore, in the step S1, the collection plan formulation needs to formulate a corresponding collection plan for the overall structure of the target tank, including clarifying the internal and external structure of the target tank, clarifying the physical / chemical properties of the radioactive mud sample in the target tank, clarifying the liquid level height of the radioactive mud sample in the target tank, and clarifying the sampling port of the target tank; it also includes selecting a suitable collection device and sample packaging container.

[0019] Furthermore, the sample collection process in step S2 includes the following steps:

[0020] Step S2.1, preparation before sampling: the end of the connecting rod of the collection end is connected to the sample tank, and the one-way valve is checked to see if it is tightly closed, and the sample container, the cleaning container and the cleaning solution are prepared;

[0021] Step S2.2, start sampling: extend the collection end from the sampling port of the target tank, and gradually connect the connecting rod through the threaded joint, and then continue to extend until the collection end reaches the bottom of the target tank;

[0022] Step S2.3, sample collection: when the collection end extends to the bottom of the tank, tighten the first handle at the top of the connecting rod, and drive the collection end to rotate 360° through the first handle. After the rotation operation is repeated several times, start to lift the collection end;

[0023] Step S2.4, sample retrieval: after the sample is collected, the entire collection device is lifted upward, during which the connecting rod is removed step by step, and the removed connecting section is placed in the cleaning container until the collection end is pulled out from the sampling port of the target tank;

[0024] Step S2.5, sample collection: the collection end is moved into the sample container, one operator holds the sample can in a vertical state, and another operator holds the sampling hook, places the elbow of the sampling hook under the one-way valve, and after finding the correct position, lifts the sampling hook upward to open the one-way valve upward, releases the radioactive mud sample in the sample can into the sample container, mixes the released radioactive mud sample evenly in the sample container, and then collects the evenly mixed radioactive mud sample into the designated sample packaging container;

[0025] Step S2.6, device cleaning: placing the sampling collection end, the connecting rod and the sampling hook in the cleaning container, and repeatedly washing them with the cleaning solution for multiple times.

[0026] Furthermore, in the sample packaging process of step S3, according to the physical / chemical properties of the radioactive mud sample, a high borosilicate glass bottle or a polyethylene plastic bottle is selected as the sample packaging container, the sample volume is preferably 2 / 3 of the container's own volume, and the bottle mouth is sealed with sealing tape or sealing film, and then placed in a ziplock bag for storage.

[0027] The beneficial effects of the present invention are as follows:

[0028] A device and method for collecting radioactive mud samples in a tank are proposed. The device can realize the efficient, accurate and safe collection of radioactive mud samples in the tank, and cooperate with the standardized sampling procedure to ensure the stability and repeatability of the sampling results.

[0029] The collection device and collection method are suitable for the collection of radioactive mud samples in various physical forms, and ensure the representativeness of the sample collection process; the radioactive mud sample sampling procedure stipulates the collection plan formulation, collection process and on-site pretreatment of radioactive mud samples. While ensuring the representativeness of sample collection, it simplifies the sample collection procedure, reduces labor costs, effectively guarantees the external radiation dose of operators, and realizes effective protection of workers during the collection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a device for collecting radioactive mud samples in a tank according to a specific embodiment of the present invention (excluding the first handle 6);

[0031] Figure 2 is a schematic diagram of a connecting rod 1 in a specific embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a first handle 6 in a specific embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of a sampling hook 7 in a specific embodiment of the present invention;

[0034] In the figure: 1-connecting rod, 2-sample tank, 3-check valve, 4-connecting section, 5-threaded joint, 6-first handle, 7-sampling hook, 8-second handle, 9-elbow. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] like Figure 1 As shown, a device for collecting radioactive mud samples in a tank body includes a collecting end head that can extend into the tank body to collect radioactive mud samples. The collecting end head includes a sample tank 2 and a one-way valve 3 arranged at a port at the bottom end of the sample tank 2. The collecting and recycling of radioactive mud samples can be completed by utilizing the combined effect of the external downward pressure acting on the sample tank 2 and the gravity of the radioactive mud sample itself.

[0037] The sample tank 2 is cylindrical, with an opening at the bottom and a closed structure at the top.

[0038] The one-way valve 3 is a mechanical one-way valve and is not equipped with a spring. One side of the one-way valve 3 is movably connected to the inner wall of the sample tank 2 and can be flipped open to the inside of the sample tank 2, and the port at the bottom of the sample tank 2 is blocked when reset.

[0039] A straight rod type connecting rod 1 is provided outside the top of the sample tank 2 (see Figure 2 ), the bottom end of the connecting rod 1 is connected to the top outer surface of the sample tank 2 by a thread, and the connecting rod 1 is coaxial with the sample tank 2.

[0040] The connecting rod 1 is composed of a plurality of connecting sections 4 connected end to end; a threaded joint 5 is provided at the tail end of the connecting section 4, and an internal thread adapted to the threaded joint 5 is provided at the top end of the connecting section 4. Two adjacent connecting sections 4 are connected via the threaded joint 5 and the internal thread. The threaded joint 5 of the connecting section 4 at the end of the connecting rod 1 is used to connect the sample tank 2 (the connecting rod 1 utilizes a multi-stage threaded connection to achieve the extension of the collection end, thereby ensuring that the harm of radioactivity to the operator is reduced during the sample collection process).

[0041] It also includes a first handle 6 (operating handle of the acquisition device, see Figure 3 ), the first handle 6 is used to connect with the top of the connecting section 4 at the top of the connecting rod 1, and the sample tank 2 can be driven to rotate along the axis through the first handle 6 through the connecting rod 1.

[0042] It also includes a sampling hook 7 for opening the one-way valve 3 (see Figure 4 ), the sampling hook 7 includes a straight rod body and a U-shaped elbow 9 (barb type design) arranged at the bottom end of the rod body, and a second handle 8 is provided at the top end of the rod body to facilitate the sampling personnel to open the one-way valve 3 at the bottom of the collection end to obtain the radioactive mud sample.

[0043] It also includes a sample container. After the sampling device completes the sampling, the radioactive mud sample in the sample tank 2 is temporarily stored in the sample container.

[0044] It also includes a cleaning container. After the sampling device completes sampling, it is cleaned with cleaning liquid in the cleaning container (including the collection end, the connecting rod 1 and the sampling hook 7); the cleaning container is also used for temporarily storing the cleaning liquid.

[0045] The connecting rod 1, the sample tank 2 and the one-way valve 3 are all made of stainless steel.

[0046] The cleaning solution is usually distilled water, and an acidic cleaning solution with a concentration of 0.1 mol / L can be selected depending on the situation.

[0047] The present invention also provides a method for collecting radioactive mud samples in a tank body using the collection device as described above, comprising the following steps:

[0048] Step S1, collection plan formulation,

[0049] Step S2, sample collection process,

[0050] Step S3, sample packaging process.

[0051] In step S1, the collection plan needs to be formulated by formulating a corresponding collection plan for the overall structure of the target tank, including clarifying the internal and external structure of the target tank, clarifying the physical / chemical properties of the radioactive mud sample in the target tank, clarifying the liquid level height of the radioactive mud sample in the target tank, clarifying the sampling port of the target tank, etc.; it also includes selecting a suitable collection device and sample packaging container.

[0052] The sample collection process in step S2 includes the following steps:

[0053] Step S2.1, preparation before sampling: the end of the connecting rod 1 of the collection end is connected to the sample tank 2, and the one-way valve 3 is checked to see if it is tightly closed, and the sample container, cleaning container and cleaning liquid are prepared;

[0054] Step S2.2, start sampling: extend the collection end from the sampling port of the target tank, and gradually connect the connecting rod 1 through the threaded joint 5, and continue to extend it until the collection end reaches the bottom of the target tank;

[0055] Step S2.3, sample collection: when the collection end extends to the bottom of the target tank, tighten the first handle 6 at the top of the connecting rod 1, and drive the collection end to rotate 360° through the first handle 6. After the rotation operation is repeated several times, start to lift the collection end; Step S2.4, sample retrieval: after the sample is collected, slowly lift the entire collection device upwards, remove the connecting rod 1 step by step during this process, and place the disassembled connecting section 4 in the cleaning container until the collection end is pulled out from the sampling port of the target tank;

[0056] Step S2.5, sample collection: move the collection end to the sample container, one operator keeps the sample tank 2 in a vertical state (the one-way valve 3 faces downward), and another operator holds the sampling hook 7, places the elbow 9 of the sampling hook 7 under the one-way valve 3, and after finding the correct position, lifts the sampling hook 7 upward to open the one-way valve 3 upward, and releases the radioactive mud sample in the sample tank 2 into the sample container. The released radioactive mud sample is mixed evenly in the sample container, and then the mixed radioactive mud sample is collected into the designated sample packaging container.

[0057] Step S2.6, device cleaning: the sampling end, connecting rod 1 and sampling hook 7 are placed in a cleaning container, and are repeatedly rinsed with cleaning liquid for multiple times.

[0058] In the sample packaging process of step S3, according to the physical / chemical properties of the radioactive mud sample, a high borosilicate glass bottle or a polyethylene plastic bottle is selected as the sample packaging container. The sample volume should be 2 / 3 of the container's own volume, and the bottle mouth is sealed with sealing tape or sealing film, and then placed in a ziplock bag for storage.

[0059] The device described in the present invention is not limited to the embodiments described in the specific implementation manner. Those skilled in the art may derive other implementation manners based on the technical solution of the present invention, which also fall within the technical innovation scope of the present invention.

Claims

1. A device for collecting radioactive mud samples in a tank, characterized by: It comprises a collection end head capable of extending into a target tank body to collect radioactive mud samples, the collection end head comprising a sample tank (2) and a one-way valve (3) arranged at a port at the bottom end of the sample tank (2).

2. The collection device according to claim 1, characterized in that: The sample tank (2) is cylindrical, with an opening at the bottom and a closed structure at the top.

3. The collection device according to claim 2, characterized in that: The one-way valve (3) is a mechanical one-way valve and is not equipped with a spring. One side of the one-way valve (3) is movably connected to the inner wall of the sample tank (2) and can be turned over to open inside the sample tank (2). When resetting, it blocks the port at the bottom of the sample tank (2).

4. The collection device according to claim 3, characterized in that: A straight rod type connecting rod (1) is provided on the outside of the top end of the sample tank (2); the bottom end of the connecting rod (1) is connected to the outer surface of the top end of the sample tank (2) via a thread, and the connecting rod (1) is coaxial with the sample tank (2).

5. The collection device according to claim 4, characterized in that: The connecting rod (1) is composed of a plurality of connecting sections (4) connected end to end; a threaded joint (5) is provided at the tail end of the connecting section (4), and an internal thread adapted to the threaded joint (5) is provided at the top end of the connecting section (4); two adjacent connecting sections (4) are connected via the threaded joint (5) and the internal thread; the threaded joint (5) of the connecting section (4) at the end of the connecting rod (1) is used to connect the sample tank (2).

6. The collection device according to claim 5, characterized in that: Also includes A first handle (6), wherein the first handle (6) is used to be connected to the top of the connecting section (4) at the top end of the connecting rod (1), and the sample tank (2) can be driven to rotate along the axis through the first handle (6) through the connecting rod (1).

7. The collection device according to claim 6, characterized in that: It also comprises a sampling hook (7) for opening the one-way valve (3), wherein the sampling hook (7) comprises a straight rod body and a U-shaped elbow (9) arranged at the bottom end of the rod body, and a second handle (8) is arranged at the top end of the rod body.

8. The collection device according to claim 7, characterized in that: It also comprises a sample container. After the sampling device completes the sampling, the radioactive mud sample in the sample tank (2) is temporarily stored in the sample container.

9. The collection device according to claim 8, characterized in that: It also includes a cleaning container. After the sampling device completes sampling, it is cleaned in the cleaning container; the cleaning container is also used for temporarily storing the cleaning liquid.

10. The collection device according to claim 9, characterized in that: The connecting rod (1), the sample tank (2) and the one-way valve (3) are all made of stainless steel.

11. A method for collecting radioactive mud samples in a tank using the collection device as claimed in claim 10, comprising the following steps: Step S1, collection plan formulation, Step S2, sample collection process, Step S3, sample packaging process.

12. The collection method according to claim 11, characterized in that: In step S1, the collection plan needs to be formulated by formulating a corresponding collection plan for the overall structure of the target tank, including clarifying the internal and external structure of the target tank, clarifying the physical / chemical properties of the radioactive mud sample in the target tank, clarifying the liquid level height of the radioactive mud sample in the target tank, and clarifying the sampling port of the target tank; it also includes selecting a collection device and a sample packaging container.

13. The collection method according to claim 12, characterized in that The sample collection process of step S2 includes the following steps: Step S2.1, preparation before sampling: the end of the connecting rod (1) of the collection end is connected to the sample tank (2), and the one-way valve (3) is checked to see whether it is tightly closed, and the sample container, the cleaning container and the cleaning liquid are prepared; Step S2.2, start sampling: extend the collection end through the sampling port of the target tank, and gradually connect the connecting rod (1) through the threaded joint (5), and continue to extend until the collection end reaches the bottom of the target tank; Step S2.3, sample collection: after the collection end extends to the bottom of the tank, the first handle (6) is tightened on the top of the connecting rod (1), and the collection end is driven to rotate 360° by the first handle (6). After the rotation operation is repeated multiple times, the collection end is started to be lifted; Step S2.4, sample retrieval: after the sample is collected, the entire collection device is lifted upwards, during which the connecting rod (1) is removed step by step, and the removed connecting section (4) is placed in the cleaning container until the collection end is pulled out from the sampling port of the target tank; Step S2.5, sample collection: the collection end is moved into the sample container, one operator holds the sample tank (2) in a vertical state, and another operator holds the sampling hook (7) and places the elbow (9) of the sampling hook (7) below the one-way valve (3). After finding the correct position, the sampling hook (7) is lifted upward so that the one-way valve (3) opens upward, and the radioactive mud sample in the sample tank (2) is released into the sample container. The released radioactive mud sample is mixed evenly in the sample container, and then the mixed radioactive mud sample is collected into the designated sample packaging container; Step S2.6, device cleaning: placing the sampling collection end, the connecting rod (1) and the sampling hook (7) in the cleaning container, and repeatedly washing them with the cleaning liquid for multiple times.

14. The collection method according to claim 13, characterized in that: In the sample packaging process of step S3, according to the physical / chemical properties of the radioactive mud sample, a high borosilicate glass bottle or a polyethylene plastic bottle is selected as the sample packaging container, the sample volume is preferably 2 / 3 of the container's own volume, and the bottle mouth is sealed with sealing tape or sealing film, and then placed in a ziplock bag for storage.

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