A comprehensive collection device for water and sediment samples for radioactive environmental investigation

Abstract

The present invention belongs to the technical field of radioactive environmental investigation, and specifically relates to a comprehensive collection device for water samples and bottom sediment samples for radioactive environmental investigation, comprising a cylindrical water storage barrel, the upper end of which is open and the lower end is closed, the water storage barrel is filled with crude oil, and a filter and a stirring part are provided inside the water storage barrel, and the stirring part is installed below the filter part. The present invention uses crude oil to absorb suspended impurities originally suspended in the water sample, and drives the water sample in the water storage barrel to circulate up and down through the stirring part to form a first water flow, and the first water flow washes away the bottom sediment sample while bringing the weeds sunk in the water sample back to the surface of the crude oil, so as to achieve the effect of separating the weeds from the bottom sediment sample; the filter part prevents the weeds from falling to the stirring part, and filters the bottom sediment sample; at the same time, the filter part uses the first water flow to move up and down to assist the weeds to float up; the water sample and bottom sediment sample separated and collected by the device can be directly used for detection.

Description

Technical Field

[0001] The invention belongs to the technical field of radioactive environmental investigation, and in particular relates to a comprehensive collection device for water samples and bottom mud samples used for radioactive environmental investigation. Background Art

[0002] There are two ways to collect radioactive samples: cumulative sampling and instantaneous sampling. Generally speaking, the sample collection method is not much different from the sampling method of non-radioactive environmental samples, especially for the collection of water samples, soil, and biological samples. When the radioactive samples to be collected are water samples and sediment samples, and the main components of the radioactive samples to be collected are water, soil, weeds, and suspended impurities; when collecting samples in a radioactive environment, weeds and suspended impurities must be separated to obtain water samples and sediment samples that can be directly detected. At the same time, there are radioactive substances in the samples, and the alpha and beta rays they produce will cause harm to the collectors.

[0003] The patent with publication number CN112230268A discloses a radioactive sample collection device for a nuclear power plant. The sampling station body of the device is a cylinder with an inverted T-shaped hollow interior. The two lateral ends of the inverted T-shaped space are respectively connected to the sampling branch lines, and a sealing component is placed on the upper part of the longitudinal middle space. The sampling syringe takes samples from the sampling station body. The device reduces the dose of sampling personnel in nuclear power plants, eliminates waste liquid discharge, saves sample loss, and eliminates the risk of hydrogen explosion caused by accumulation of hydrogen in the sample in the glove box. The device is also suitable for sampling other non-radioactive toxic and harmful liquids and gases, and can achieve the effect of eliminating sampling waste liquid and greatly reducing the inhalation or diffusion of toxic and harmful fluids. However, the following problems still exist:

[0004] The existing collection method is to have personnel wearing protective clothing manually separate the weeds. Although the personnel are protected by protective clothing, they still cannot be 100% protected for a long time; at the same time, it is also impossible to remove suspended impurities and weeds at the same time, and the collection efficiency is low. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, which is used to solve the problems that the existing collection method is to separate weeds manually by personnel wearing protective clothing. Although the personnel are protected by protective clothing, they cannot be 100% protected for a long time; at the same time, it is impossible to remove suspended impurities and weeds at the same time, and the collection efficiency is low.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A comprehensive collection device for water samples and sediment samples for radioactive environmental investigations comprises a cylindrical water storage barrel with an open upper end and a closed lower end. Crude oil is contained in the water storage barrel. A filtering part and a stirring part are arranged inside the water storage barrel. The stirring part is installed below the filtering part.

[0008] Furthermore, the stirring part further comprises a stirring transmission shaft arranged at the center of the water storage barrel, the upper end of the stirring transmission shaft is connected to a rotational power source, the lower part of the stirring transmission shaft is provided with a stirring component, a stirring component and a mixing component, the stirring component is between the stirring component and the mixing component, and the stirring component is movably connected to the stirring transmission shaft; the stirring component and the mixing component are both fixedly connected to the stirring transmission shaft, and the stirring component is arranged above the stirring component, and the mixing component is arranged below the stirring component;

[0009] A gap is left between the side of the stirring part and the inner wall of the water storage barrel, and the diameter of the stirring component is smaller than the diameter of the stirring component.

[0010] Furthermore, the stirring assembly further comprises a conical seat, a stirring through hole is provided at the axis of the conical seat and the conical top is installed upward;

[0011] The side wall circumference of the conical seat is evenly distributed with a plurality of stirring curved surface sheets;

[0012] The stirring assembly further comprises a mounting disc, and a stirring through hole is provided at the center of the mounting disc;

[0013] A plurality of stirring curved surface pieces are evenly distributed on the circumference of the upper surface of the mounting disc, and the stirring curved surface pieces are strip-shaped arcs.

[0014] Furthermore, the mixing component further comprises an upper disc, a mixing curved surface sheet and a lower disc, wherein the upper disc is fixed above the lower disc through the mixing curved surface sheet, the upper disc is parallel to the lower disc, and the diameter of the upper disc is smaller than the diameter of the lower disc;

[0015] The centers of the upper and lower disks are both provided with mixing through holes, and the mixing curved surface sheets are strip-shaped arcs and are evenly distributed around the circumference.

[0016] Furthermore, the filter portion includes a filter plate, which includes a conical filter plate and a circular enclosure plate. The conical tip of the conical filter plate is downward, and the top outer edge of the conical filter plate is integrally formed with the top edge of the circular enclosure plate. The outer wall of the circular enclosure plate is in contact with the inner wall of the water storage barrel and is slidably connected to the inner wall of the water storage barrel; the conical filter plate is provided with a plurality of filter holes, and a sliding hole is provided at the center of the conical filter plate; the agitation drive shaft passes through the sliding hole and is slidably connected to the conical filter plate.

[0017] Furthermore, a paddle and a sleeve are provided at the lower part of the filter disc, the paddle is arranged in an inclined shape, the inner end of the paddle is fixed on the wall of the sleeve, the outer end of the paddle is fixed on the inner wall of the circular enclosure, and the stirring transmission shaft passes through the sleeve and is slidably connected to the sleeve.

[0018] Furthermore, the angle between the blade and the horizontal plane is a, 28.5°≤a≤42.4°.

[0019] Furthermore, the API value of the crude oil is b, 10<b≤22.3.

[0020] Furthermore, it also includes a conveying component, the feed end of the conveying component is fixed at the edge above the water storage barrel, the discharge end of the conveying component is suspended in the air, and a plurality of hooks are fixed on the conveying component at equal distances.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the device is in use, the radioactive sample is dropped from the top of the water storage barrel. The water sample and the bottom mud sample pass through the crude oil and sink to the bottom of the water storage barrel. Some weeds are directly washed away from the mud and float above the crude oil, while the other part of the weeds carry the bottom mud sample and are suspended in the water sample; the crude oil is used to absorb the suspended impurities originally suspended in the water sample, so that the suspended impurities remain in the crude oil.

[0023] 2. The rotating power source drives the stirring drive shaft to rotate, and then drives the stirring component and the mixing component to rotate; the stirring component generates an upward first water flow at the center of the water storage barrel, and the water sample near the inner wall of the water storage barrel flows to the low-pressure area in the center, thereby impacting the stirring component, causing it to rotate to form a circulating first water flow; and the soil falls from the gap to the bottom of the water storage barrel.

[0024] 3. Taking advantage of the fact that the density of crude oil is lower than that of water samples, the crude oil is always above the water samples. At the same time, the viscosity of crude oil is much greater than that of water, so it absorbs the suspended impurities originally suspended in the water samples and makes the suspended impurities remain in the crude oil.

[0025] 4. The stirring part drives the water sample in the water storage bucket to circulate up and down to form a first water flow. The first water flow washes away the bottom mud sample and brings the weeds sunk in the water sample back to the surface of the crude oil, thereby achieving the effect of separating the weeds from the bottom mud sample.

[0026] 5. On the one hand, the filter part can prevent weeds from falling into the stirring part and filter the bottom mud sample; on the other hand, the filter part can also use the up and down movement of the first water flow to help the weeds float up, and the separated and collected water samples and bottom mud samples can be directly used for detection.

[0027] 6. The stirring component has the function of integrating the first water flow and making the first water flow stably upward; the mixing component can form a second water flow, which circulates between the stirring component and the mixing component. The second water flow can ensure that the water below the mixing component is relatively still, reducing the suspension phenomenon of the bottom mud sample below the mixing component caused by the operation of the stirring part, so as to achieve the sedimentation of mud below the mixing component. The conical seat and the stirring curved surface piece can form a stable upward first water flow when rotating; the installation disc can not only provide the function of installing and fixing the stirring curved surface piece, but also block the downward flow trend of the first water flow, so that the first water flow always keeps flowing upward. At the same time, the strip-shaped arc-shaped stirring curved surface piece can make the first water flow stably move upward, improving the stability of the first water flow.

[0028] 7. The first water flow is a circulating water flow with the middle upward and the edge downward on the vertical plane, and is a rotating water flow rotating around the axis of the water storage barrel on the horizontal plane. The movement of the first water flow is the superposition of the circulating water flow and the rotating water flow vectors; the filter disc is lifted by the upward push of the circulating water flow at the center, and the paddles rotate under the action of the rotating water flow, and because the paddles are arranged in an inclined state, the rotating water flow can also generate an upward component force on the paddles, thereby enhancing the lifting effect of the first water flow on the filter disc.

[0029] 8. After the transmission component is started, the weeds can be automatically grabbed by the claws to achieve automated collection, avoiding personnel contact with radioactive substances and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a comprehensive collection device for water samples and bottom mud samples for radioactive environment investigation of the present invention;

[0031] Figure 2 It is a schematic diagram of the plan structure of an embodiment of a comprehensive collection device for water samples and bottom mud samples for radioactive environment investigation according to the present invention;

[0032] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0033] Figure 4 It is a schematic diagram of the three-dimensional assembly structure of the filtering part and the stirring part in an embodiment of a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation of the present invention;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the filter part in an embodiment of a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation of the present invention;

[0035] The reference numerals in the drawings of the specification include:

[0036] Water storage tank 1, filtering part 2, stirring part 3, crude oil 4;

[0037] Transmission component 11;

[0038] Filter disc 21, paddle 22, sleeve 23;

[0039] Sliding hole 211, filter hole 212;

[0040] Transmission shaft 31, stirring assembly 32, stirring assembly 33, mixing assembly 34;

[0041] Conical seat 321, stirring through hole 322, stirring curved surface sheet 323;

[0042] Install the disc 331, the stirring through hole 332, and the stirring curved surface sheet 333;

[0043] An upper disc 341 , a mixing curved surface sheet 342 , a lower disc 343 , and a mixing through hole 344 . DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0045] Embodiment 1

[0046] like Figure 1-Figure 5 As shown, the present invention is a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, including a cylindrical water storage barrel 1, the water storage barrel 1 is open at the upper end and closed at the lower end, crude oil 4 is contained in the water storage barrel 1, and a filter part 2 and a stirring part 3 are provided inside the water storage barrel 1, and the stirring part 3 is installed below the filter part 2.

[0047] The stirring part 3 further comprises a stirring transmission shaft 31 arranged at the center of the water storage barrel 1, the upper end of the stirring transmission shaft 31 is connected to a rotational power source, and the lower part of the stirring transmission shaft 31 is provided with a stirring assembly 32, a stirring assembly 33 and a mixing assembly 34, the stirring assembly 33 is between the stirring assembly 32 and the mixing assembly 34, and the stirring assembly 33 is movably connected to the stirring transmission shaft 31; the stirring assembly 32 and the mixing assembly 34 are both fixedly connected to the stirring transmission shaft 31, and the stirring assembly 32 is arranged above the stirring assembly 33, and the mixing assembly 34 is arranged below the stirring assembly 33;

[0048] A gap is left between the side of the stirring portion 3 and the inner wall of the water storage barrel 1 , and the diameter of the stirring component 32 is smaller than the diameter of the stirring component 33 .

[0049] The stirring assembly 32 further comprises a conical seat 321, a stirring through hole 322 is provided at the axis of the conical seat 321 and the conical top is installed upward;

[0050] A plurality of stirring curved surface pieces 323 are evenly distributed on the circumference of the side wall of the conical seat 321;

[0051] The stirring assembly 33 further includes a mounting disc 331, and a stirring through hole 332 is opened at the center of the mounting disc 331;

[0052] A plurality of stirring curved surface pieces 333 are evenly distributed on the circumference of the upper surface of the installation disk 331 , and the stirring curved surface pieces 333 are strip-shaped arcs.

[0053] The mixing assembly 34 further comprises an upper disc 341, a mixing curved surface sheet 342 and a lower disc 343. The upper disc 341 is fixed above the lower disc 343 through the mixing curved surface sheet 342. The upper disc 341 is parallel to the lower disc 343, and the diameter of the upper disc 341 is smaller than the diameter of the lower disc 343.

[0054] A mixing through hole 344 is provided at the center of the upper disk 341 and the lower disk 343 , and the mixing curved surface pieces 342 are arc-shaped and evenly distributed around the circumference.

[0055] Embodiment 2

[0056] like Figure 1-Figure 5 As shown, the present invention is a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, including a cylindrical water storage barrel 1, the water storage barrel 1 is open at the upper end and closed at the lower end, crude oil 4 is contained in the water storage barrel 1, and a filter part 2 and a stirring part 3 are provided inside the water storage barrel 1, and the stirring part 3 is installed below the filter part 2.

[0057] The stirring part 3 further comprises a stirring transmission shaft 31 arranged at the center of the water storage barrel 1, the upper end of the stirring transmission shaft 31 is connected to a rotational power source, and the lower part of the stirring transmission shaft 31 is provided with a stirring assembly 32, a stirring assembly 33 and a mixing assembly 34, the stirring assembly 33 is between the stirring assembly 32 and the mixing assembly 34, and the stirring assembly 33 is movably connected to the stirring transmission shaft 31; the stirring assembly 32 and the mixing assembly 34 are both fixedly connected to the stirring transmission shaft 31, and the stirring assembly 32 is arranged above the stirring assembly 33, and the mixing assembly 34 is arranged below the stirring assembly 33;

[0058] A gap is left between the side of the stirring portion 3 and the inner wall of the water storage barrel 1 , and the diameter of the stirring component 32 is smaller than the diameter of the stirring component 33 .

[0059] The filter part 2 further includes a filter disc 21, which includes a conical filter plate and a circular enclosure. The cone tip of the conical filter plate is downward, the top outer edge of the conical filter plate is integrally formed with the top edge of the circular enclosure, and the outer wall of the circular enclosure contacts the inner wall of the water storage barrel 1 and is slidably connected to the inner wall of the water storage barrel 1; the conical filter plate is provided with a plurality of filter holes 212, and a sliding hole 211 is provided at the center of the conical filter plate; the stirring drive shaft 31 passes through the sliding hole 211 and is slidably connected to the conical filter plate.

[0060] A paddle 22 and a sleeve 23 are provided at the lower part of the filter disc 21. The paddle 22 is arranged in an inclined shape. The inner end of the paddle 22 is fixed on the wall of the sleeve 23, and the outer end of the paddle 22 is fixed on the inner wall of the circular enclosure. The stirring transmission shaft 31 passes through the sleeve 23 and is slidably connected to the sleeve 23.

[0061] The included angle between the blade 22 and the horizontal plane is a, 28.5°≤a≤42.4°.

[0062] Embodiment 3

[0063] like Figure 1-Figure 5 As shown, the present invention is a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, including a cylindrical water storage barrel 1, the water storage barrel 1 is open at the upper end and closed at the lower end, crude oil 4 is contained in the water storage barrel 1, and a filter part 2 and a stirring part 3 are provided inside the water storage barrel 1, and the stirring part 3 is installed below the filter part 2.

[0064] The API value of crude oil 4 is b, 10<b≤22.3.

[0065] Embodiment 4

[0066] like Figure 1-Figure 5 As shown, the present invention is a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, including a cylindrical water storage barrel 1, the water storage barrel 1 is open at the upper end and closed at the lower end, crude oil 4 is contained in the water storage barrel 1, and a filter part 2 and a stirring part 3 are provided inside the water storage barrel 1, and the stirring part 3 is installed below the filter part 2.

[0067] It also includes a conveying component 11, the feeding end of the conveying component 11 is fixed at the edge above the water storage barrel 1, the discharging end of the conveying component 11 is suspended in the air, and a plurality of hooks are fixed on the conveying component 11 at equal distances.

[0068] Embodiment 5

[0069] like Figure 1-Figure 5 As shown, the present invention is a comprehensive collection device for water samples and sediment samples for radioactive environmental investigation, including a cylindrical water storage barrel 1, the water storage barrel 1 is open at the upper end and closed at the lower end, crude oil 4 is contained in the water storage barrel 1, and a filter part 2 and a stirring part 3 are provided inside the water storage barrel 1, the stirring part 3 is installed below the filter part 2, and the stirring part 3 and the filter part 2 are both immersed in the water sample.

[0070] When the device is in use, the radioactive sample is put into the water storage barrel 1 from above, and the water sample and the bottom mud sample pass through the crude oil 4 and sink to the bottom of the water storage barrel 1. Some weeds are directly washed away from the mud and float above the crude oil 4, while the other part of the weeds carry the bottom mud sample and suspend in the water sample; the density of the crude oil 4 is less than that of the water sample, so that the crude oil 4 is always above the water sample. At the same time, the viscosity of the crude oil is much greater than that of water, so that the suspended impurities originally suspended in the water sample are adsorbed, so that the suspended impurities remain in the crude oil 4. The stirring part 3 drives the water sample in the water storage barrel 1 to circulate up and down to form a first water flow. The first water flow washes away the bottom mud sample and brings the weeds sunk in the water sample back to the surface of the crude oil 4, so as to achieve the effect of separating the weeds from the bottom mud sample. On the one hand, the filter part 2 can prevent the weeds from falling to the stirring part 3 and filter the bottom mud sample; on the other hand, the filter part 2 can also use the first water flow to move up and down to assist the weeds to float up, and the separated and collected water sample and bottom mud sample can be directly used for detection.

[0071] The stirring part 3 further comprises a stirring transmission shaft 31 arranged at the center of the water storage barrel 1, the upper end of the stirring transmission shaft 31 is connected to a rotational power source, and the lower part of the stirring transmission shaft 31 is provided with a stirring assembly 32, a stirring assembly 33 and a mixing assembly 34, the stirring assembly 33 is between the stirring assembly 32 and the mixing assembly 34, and the stirring assembly 33 is movably connected to the stirring transmission shaft 31; the stirring assembly 32 and the mixing assembly 34 are both fixedly connected to the stirring transmission shaft 31, and the stirring assembly 32 is arranged above the stirring assembly 33, and the mixing assembly 34 is arranged below the stirring assembly 33;

[0072] A gap is left between the side of the stirring portion 3 and the inner wall of the water storage barrel 1 , and the diameter of the stirring component 32 is smaller than the diameter of the stirring component 33 .

[0073] With this design, the rotating power source drives the stirring transmission shaft 31 to rotate, and then drives the stirring component 32 and the mixing component 34 to rotate; the stirring component 32 generates an upward first water flow at the center of the water storage barrel 1, and the water sample near the inner wall of the water storage barrel 1 flows to the low-pressure area at the center, impacting the stirring component 33, causing it to rotate to form a circulating first water flow; and the mud falls from the gap to the bottom of the water storage barrel 1. The stirring component 33 has the function of integrating the first water flow and making the first water flow stably upward; the mixing component 34 can form a second water flow, which circulates between the stirring component 33 and the mixing component 34. The second water flow can ensure that the water below the mixing component 34 is relatively still, reducing the suspension phenomenon of the bottom mud sample below the mixing component 34 caused by the operation of the stirring part 3, so as to achieve the deposition of mud below the mixing component 34.

[0074] The stirring assembly 32 further comprises a conical seat 321, a stirring through hole 322 is provided at the axis of the conical seat 321 and the conical top is installed upward;

[0075] A plurality of stirring curved surface pieces 323 are evenly distributed on the circumference of the side wall of the conical seat 321;

[0076] The stirring assembly 33 further includes a mounting disc 331, and a stirring through hole 332 is opened at the center of the mounting disc 331;

[0077] A plurality of stirring curved surface pieces 333 are evenly distributed on the circumference of the upper surface of the installation disk 331 , and the stirring curved surface pieces 333 are strip-shaped arcs.

[0078] The mixing assembly 34 further comprises an upper disc 341, a mixing curved surface sheet 342 and a lower disc 343. The upper disc 341 is fixed above the lower disc 343 through the mixing curved surface sheet 342. The upper disc 341 is parallel to the lower disc 343, and the diameter of the upper disc 341 is smaller than the diameter of the lower disc 343.

[0079] A mixing through hole 344 is provided at the center of the upper disk 341 and the lower disk 343 , and the mixing curved surface pieces 342 are arc-shaped and evenly distributed around the circumference.

[0080] With this design, the stirring drive shaft 31 passes through the stirring through hole 322, the stirring through hole 332 and the mixing through hole 344 from top to bottom in sequence; the conical seat 321 and the stirring curved surface piece 323 can form a stable upward first water flow when rotating; the mounting disc 331 can not only provide the function of installing and fixing the stirring curved surface piece 333, but also block the downward flow tendency of the first water flow, so that the first water flow always keeps flowing upward; at the same time, the strip-shaped arc-shaped stirring curved surface piece 333 can make the first water flow move upward stably, thereby improving the flow stability of the first water flow.

[0081] The filter part 2 further includes a filter disc 21, which includes a conical filter plate and a circular enclosure. The cone tip of the conical filter plate is downward, the top outer edge of the conical filter plate is integrally formed with the top edge of the circular enclosure, and the outer wall of the circular enclosure contacts the inner wall of the water storage barrel 1 and is slidably connected to the inner wall of the water storage barrel 1; the conical filter plate is provided with a plurality of filter holes 212, and a sliding hole 211 is provided at the center of the conical filter plate; the stirring drive shaft 31 passes through the sliding hole 211 and is slidably connected to the conical filter plate.

[0082] With such a design, the filter disc 21 can filter the weeds, so that the weeds are separated above the filter disc 21 and lifted upward by the first water flow.

[0083] A paddle 22 and a sleeve 23 are provided at the lower part of the filter disc 21. The paddle 22 is arranged in an inclined shape. The inner end of the paddle 22 is fixed on the wall of the sleeve 23, and the outer end of the paddle 22 is fixed on the inner wall of the circular enclosure. The stirring transmission shaft 31 passes through the sleeve 23 and is slidably connected to the sleeve 23.

[0084] With such a design, the first water flow is a circulating water flow with the middle upward and the edges downward on the vertical plane, and is a rotating water flow rotating around the axis of the water storage barrel 1 on the horizontal plane. The movement of the first water flow is a superposition of the circulating water flow and the rotating water flow vectors; the filter disc 21 is lifted by the upward push of the circulating water flow at the center, and the paddle 22 rotates under the action of the rotating water flow. Since the paddle 22 is installed in an inclined state, the rotating water flow can also generate an upward component force on the paddle 22, thereby enhancing the lifting effect of the first water flow on the filter disc 21.

[0085] The included angle between the blade 22 and the horizontal plane is a, 28.5°≤a≤42.4°.

[0086] When a is 0°, the blade 22 is horizontal; when a is 90°, the blade 22 is vertical. If a is too large or too small, the upward force of the rotating water flow cannot be effectively utilized. Assuming that the upward force of the rotating water flow is f1, the downward force of the rotating water flow is f2, and the resultant force of the rotating water flow is F, then:

[0087] f1 = F*sina2;

[0088] f2 = F*cosa2;

[0089] The lifting force detection test showed that when a is 28.5°, f1=0.477F; when a is 42.4°, f1=0.674F. When a is within this range, the influence of f2 on f1 is minimal.

[0090] The API value of crude oil 4 is b, 10<b≤22.3.

[0091] When the API value of crude oil 4 is equal to 10, the density of crude oil 4 is the same as that of water, so it will not float on the water sample, so the API value of crude oil 4 needs to be greater than 10; when the API value of crude oil 4 is greater than 22.3, crude oil 4 is medium crude oil, the density and viscosity of medium crude oil are less than heavy crude oil, and the ability of medium crude oil to adsorb floating impurities is lower than that of heavy crude oil.

[0092] It also includes a conveying component 11, the feeding end of the conveying component 11 is fixed at the edge above the water storage barrel 1, the discharging end of the conveying component 11 is suspended in the air, and a plurality of hooks are fixed on the conveying component 11 at equal distances.

[0093] With such a design, after the conveying assembly 11 is started, the weeds can be automatically grabbed by the hook, thereby realizing automated collection, avoiding personnel from contacting radioactive substances, and improving safety.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A comprehensive collection device for water and sediment samples for radioactive environmental investigation, characterized in that: The invention comprises a cylindrical water storage barrel (1), wherein the upper end of the water storage barrel (1) is open and the lower end is closed, and crude oil (4) is contained in the water storage barrel (1). A filtering part (2) and a stirring part (3) are provided inside the water storage barrel (1), and the stirring part (3) is installed below the filtering part (2); The stirring portion (3) further comprises a stirring transmission shaft (31) arranged at the center of the water storage barrel (1); the upper end of the stirring transmission shaft (31) is connected to a rotational power source; the lower part of the stirring transmission shaft (31) is provided with a stirring component (32), a stirring component (33) and a mixing component (34); the stirring component (33) is between the stirring component (32) and the mixing component (34), and the stirring component (33) is movably connected to the stirring transmission shaft (31); the stirring component (32) and the mixing component (34) are both fixedly connected to the stirring transmission shaft (31), and the stirring component (32) is arranged above the stirring component (33), and the mixing component (34) is arranged below the stirring component (33); A gap is left between the side of the stirring portion (3) and the inner wall of the water storage barrel (1), and the diameter of the stirring component (32) is smaller than the diameter of the stirring component (33); The stirring assembly (32) further comprises a conical seat (321), a stirring through hole (322) is provided at the axis of the conical seat (321) and the conical seat (321) is installed with the top of the cone facing upwards; A plurality of stirring curved surface sheets (323) are evenly distributed on the circumference of the side wall of the conical seat (321); The stirring assembly (33) further comprises a mounting disc (331), and a stirring through hole (332) is formed at the center of the mounting disc (331); A plurality of stirring curved surface pieces (333) are evenly distributed on the circumference of the upper surface of the mounting disc (331), and the stirring curved surface pieces (333) are strip-shaped arcs; The mixing component (34) further comprises an upper disc (341), a mixing curved surface sheet (342) and a lower disc (343); the upper disc (341) is fixed above the lower disc (343) via the mixing curved surface sheet (342); the upper disc (341) is parallel to the lower disc (343); and the diameter of the upper disc (341) is smaller than the diameter of the lower disc (343); The upper disk (341) and the lower disk (343) are both provided with mixing through holes (344) at their centers, and the mixing curved surface sheets (342) are strip-shaped arcs and are evenly distributed around the circumference; The filter portion (2) further comprises a filter disc (21), wherein the filter disc (21) comprises a conical filter plate and a circular enclosure, wherein the conical filter plate has a downwardly pointed cone, wherein the top outer edge of the conical filter plate is integrally formed with the top edge of the circular enclosure, and the outer wall of the circular enclosure contacts the inner wall of the water storage barrel (1) and is slidably connected to the inner wall of the water storage barrel (1); the conical filter plate is provided with a plurality of filter holes (212), and a sliding hole (211) is provided at the center of the conical filter plate; the agitation transmission shaft (31) passes through the sliding hole (211) and is slidably connected to the conical filter plate; The filter disc (21) is provided with a paddle (22) and a sleeve (23) at the bottom thereof. The paddle (22) is arranged in an inclined shape. The inner end of the paddle (22) is fixed to the wall of the sleeve (23), the outer end of the paddle (22) is fixed to the inner wall of the circular enclosure, and the stirring transmission shaft (31) passes through the sleeve (23) and is slidably connected to the sleeve (23); The angle between the blade (22) and the horizontal plane is a, 28.5°≤a≤42.4°; the API value of the crude oil (4) is b, 10<b≤22.3; It also comprises a conveying component (11), wherein the feeding end of the conveying component (11) is fixed at the edge above the water storage barrel (1), the discharging end of the conveying component (11) is suspended in the air, and a plurality of hooks are fixed on the conveying component (11) at equal distances.

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