A sampling device for monitoring of mineral environments and a method of use thereof

Abstract

This application provides a sampling device and its usage method for mineral environment monitoring, belonging to the field of geological environment sampling and monitoring. It includes a support frame and a winding / unwinding mechanism, with the winding / unwinding mechanism located on the upper part of the support frame. The winding mechanism is connected to a sampling mechanism, which includes a sampling cylinder and a sampling tube. The sampling tube has a first opening and a second opening at its opposite ends. In this invention, by setting up a sampling tube, a pressure block, an electric heating element, an adsorption platform, and an electric push rod, the flat sampling tube is kept clean inside during sampling, forming a "cavity-free" physical isolation that blocks the penetration path of pollutants. When the water layer requiring sampling is reached, the electric push rod drives the pressure block and adsorption platform to open the sampling tube for sampling. After sampling, the sampling tube is heat-sealed by the electric heating element, allowing for sample collection underwater.

Description

Technical Field

[0001] This application relates to the field of geological environment sampling and monitoring technology, and in particular to a sampling device for mineral environment monitoring and its usage method. Background Technology

[0002] With the increasing demands for mineral resource development and utilization and ecological environmental protection in my country, water quality monitoring of groundwater and surface water around mineral environments has become an important means of preventing environmental pollution. In mineral environment monitoring, accurately obtaining representative water samples is a prerequisite for subsequent analysis of heavy metals, acidic substances and volatile organic compounds. At present, the conventional sampling methods in the industry mainly include Bayler tube sampling and pump sampling. Both of these methods involve underwater water sample collection and extraction. In existing technologies, neither the Bayler tube sampling method nor the pump sampling method can immediately isolate the outside air when the sampling is completed. When the Bayler tube is pulled up, the piston effect causes air to mix in, and when the pump is pumped out, residual air and volatilization occur in the pipeline. The process of moving the water sample to the wellhead can lead to water sample oxidation, release of volatile organic compounds, and contamination by exogenous microorganisms or impurities, ultimately causing the test data to lose its originality and accuracy. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a sampling device for mineral environment monitoring, which can directly complete sampling and sealing in water bodies to ensure the integrity and accuracy of the samples.

[0004] To solve the above-mentioned technical problems, this application provides the following technical solution: A sampling device for monitoring the mineral environment includes a support and a winding mechanism. The winding mechanism is located on the upper part of the support and is connected to a sampling mechanism. The sampling mechanism includes a sampling cylinder and a sampling tube. The two opposite ends of the sampling tube form a first opening and a second opening, respectively. The internal channel of the sampling tube passes through the first opening and the second opening. The sampling tube passes through the middle of the sampling cylinder. Both sides of the sampling tube are equipped with an electric push rod. The extension part of the electric push rod located in the middle is connected to an adsorption platform. An adsorption hole is opened on one side wall of the adsorption platform facing the central axis of the sampling tube. The adsorption platform has a cavity inside that is connected to its own adsorption hole. A connecting pipe is provided on the side wall of the adsorption platform that penetrates the side wall of the sampling tube. A valve is provided at one end of the connecting pipe that penetrates the side wall of the sampling tube. A sealing mechanism is provided at the top and bottom of the adsorption platform. The sealing mechanism includes a pressure block and an electric heating tube. The pressure block is connected to the telescopic parts of the electric push rod 1 on the upper and lower sides inside the sampling cylinder, and the electric heating tube is fixedly installed on the surface of the pressure block.

[0005] Preferably, the adsorption platform has adsorption holes arranged in a rectangular array on its surface, each adsorption hole having a circular opening. The adsorption platform has an internal cavity that is connected to all the adsorption holes. One end of the connecting pipe is embedded in the internal cavity of the adsorption platform to connect the cavity to the external gas path.

[0006] Preferably, the sampling tube is made of polyethylene, polypropylene, polyvinylidene chloride, or polyester. A protective film is attached to the outer surface of the sampling tube. The protective film is made of the same material as the sampling tube. A peelable adhesive layer is provided between the sampling tube and the protective film. The adhesive layer is used to peel off the outer film after sampling. The surface of the protective film is provided with an easy-tear opening. The easy-tear opening is a preset linear weakening structure that extends along the axial direction of the protective film. It is used to guide the outer film to peel off along the adhesive layer after sampling, exposing the uncontaminated surface of the sampling tube, so as to maintain the cleanliness of the outer surface of the sampling tube.

[0007] Preferably, the adsorption platform includes a straight surface facing the central axis of the sampling tube, wherein the width of a single adsorption platform is greater than the width of the sampling tube in the flattened state, and the total lateral span of the adsorption holes on the sidewall of the adsorption platform is less than the width of the sampling tube in the flattened state.

[0008] Preferably, the surface of the pressing block has through holes arranged in a rectangular array, the interior of the pressing block has a cavity that communicates with the through holes on its surface, the side wall of the pressing block is provided with a second connecting pipe, the second connecting pipe communicates with the cavity in the interior of the pressing block, the other end of the second connecting pipe passes through a sampling cylinder, and a valve is provided at one end of the second connecting pipe that passes through the side wall of the sampling cylinder.

[0009] Preferably, two partition plates are respectively provided on both sides of the inside of the sampling tube, a single adsorption platform is provided between the two partition plates on the same side, the pressure block is provided between the partition plate and the horizontal inner wall of the sampling tube, and a protective sleeve is connected to the end of the partition plate.

[0010] Preferably, the top of the sampling cylinder is provided with a limiting component, which includes: a connecting seat, a roller and a rotating roller. The connecting seat is located at the top of the sampling cylinder and is a tubular structure that runs through both the top and bottom ends. The two rollers are respectively connected to the inner sides of the connecting seat, and the rotating roller is fastened to the upper part of the inner side of the connecting seat by bolts. The sampling tube has a strip-shaped hole at the top center, and the gap between the two rollers is located directly above the strip-shaped hole at the top of the sampling tube. The sampling tube is wound around the surface of the rotating roller.

[0011] Preferably, an electric push rod 2 is also provided on the outer side of the sampling cylinder. The telescopic part of the electric push rod 2 is connected to a baffle. The bottom of the baffle is connected to a support. A limit strip is provided on the top edge of the baffle. The limit strip is attached to the end of the connecting pipe 1.

[0012] Preferably, the pressure block has a groove on the side facing the central axis of the sampling cylinder, and there are two grooves. The two grooves are respectively located on the upper and lower sides of the side wall of the pressure block. The heating tube is embedded in the groove of the side wall of the pressure block, and a silicone protective pad is provided at the opening of the groove of the side wall of the pressure block.

[0013] Another aspect of this application provides a method for using a sampling device for mineral environment monitoring: S1: Place the bracket securely at the sampling point, and control the electric push rod in the middle of the sampling tube to move the two adsorption platforms closer to each other, and clamp the sampling tube with the two adsorption platforms. S2: By controlling the extension of the electric push rods at the upper and lower positions inside the sampling tube, the pressure blocks are moved, and the two opposing pressure blocks clamp the sampling tube together. S3: By connecting the external negative pressure device to the connecting pipe one, the air in the cavity inside the adsorption platform is extracted, and a negative pressure state is formed in the cavity inside the adsorption platform, so that the sampling tube is adsorbed on the surface of the adsorption platform. S4: The sampling tube is placed into the water body to a suitable water layer through the winding mechanism. The electric push rod retracts, causing the pressure block and adsorption platform to move away from the central axis of the sampling tube. The sampling tube unfolds under the displacement of the adsorption platform, and the water body naturally enters the sampling tube. S5: The electric push rod drives the pressure block to move towards the central axis of the sampling tube, clamping the sampling tube to achieve a seal. The electric heating tube heat-seals the sampling tube to further seal the sample. Then the sampling tube can be removed.

[0014] In this invention, by setting up a sampling tube, a pressure block, an electric heating tube, an adsorption platform, and an electric push rod, the interior of the flat sampling tube is kept clean during sampling, forming a "cavity-free" physical isolation that blocks the penetration path of pollutants. When the water layer to be sampled is reached, the electric push rod drives the pressure block and adsorption platform to open the sampling tube for sampling. After sampling, the sampling tube is heat-sealed by the electric heating tube. The sample collection can be completed underwater, and the sampling position is also the sealing position, eliminating the risk of external air intervention and cross-contamination, and is not easily affected by interference from other water layers, thus maintaining the accuracy and impartiality of mineral water environment monitoring sampling.

[0015] In this invention, by setting up a sampling tube and a protective membrane, the protective membrane is designed to isolate external impurities, and the clean surface of the sampling tube can be exposed through the linear weakening structure of the protective membrane, reducing the possibility of contaminants remaining on the surface of the sampling tube. In addition, the protective membrane can also strengthen the overall strength of the sampling tube, making it less prone to damage and leakage, and thus safer.

[0016] In this invention, by setting up a baffle and an electric push rod 2, the sampling cylinder and sampling tube can be shielded and protected, reducing the invasion of external impurities into the sampling tube. After sampling, the baffle can support the sampling tube, thereby achieving the purpose of protecting the sampling tube and facilitating its use. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure in this application; Figure 2 This is a schematic diagram of the overall structure of the sampling cylinder in this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the sampling cylinder in this application; Figure 4 This is a schematic diagram of the pressure block structure in this application; Figure 5 This is a schematic diagram of the partition structure in this application; Figure 6 This is a schematic diagram of the electric heating tube structure in this application; Figure 7 This is a schematic diagram of the adsorption platform structure in this application; Figure 8 This is a schematic diagram of the sampling tube structure in this application; [Figure Labels] 1. Support; 2. Sampling cylinder; 201. Electric push rod one; 202. Divider plate; 203. Protective sleeve; 3. Sampling tube; 301. Protective film; 4. Adsorption platform; 401. Connecting tube one; 5. Pressing block; 501. Electric heating tube; 502. Connecting tube two; 503. Protective pad; 6. Connecting seat; 601. Roller; 602. Rotating roller; 7. Electric push rod two; 701. Baffle; 702. Support; 703. Limiting strip. Detailed Implementation

[0019] The following describes in detail a sampling device for mineral environment monitoring and its usage method provided in this application, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0020] like Figures 1-6 The sampling device for mineral environment monitoring shown in this application includes a support 1 and a winding mechanism. The winding mechanism is located on the upper part of the support 1 and includes a winding roller, a servo motor and a nylon rope. The winding roller is rotatably connected to the middle position of the top of the support 1. The servo motor is fixedly installed on the side of the support 1. One end of the nylon rope is wound around the surface of the winding roller, and the other end passes through the through hole in the middle of the support 1 and is connected to the top of the sampling cylinder 2. The winding mechanism is connected to a sampling mechanism, which includes a sampling cylinder 2 and a sampling tube 3. The two opposite ends of the sampling tube 3 form a first opening and a second opening, respectively. The internal channel of the sampling tube 3 passes through the first opening and the second opening. The sampling tube 3 passes through the middle of the sampling cylinder 2. Electric push rods 201 are provided on both sides of the inside of the sampling cylinder 2. The extension part of the electric push rod 201 located in the middle is connected to the adsorption platform 4. The adsorption platform 4 has an adsorption hole on one side wall facing the central axis of the sampling cylinder 2. The adsorption platform 4 has a cavity inside that is connected to its own adsorption hole. The side wall of the adsorption platform 4 is provided with a connecting pipe 401 that penetrates the side wall of the sampling cylinder 2. A valve is provided at one end of the connecting pipe 401 that penetrates the side wall of the sampling cylinder 2. Sealing mechanisms are provided at the top and bottom of the adsorption platform 4. The sealing mechanism includes: a pressure block 5 and an electric heating tube 501. The pressure block 5 is connected to the telescopic part of the electric push rod 201 on the upper and lower sides inside the sampling cylinder 2. The electric heating tube 501 is fixedly installed on the surface of the pressure block 5. When the sampling tube 3 is made of silicone rubber, it has soft properties and a certain degree of elasticity, allowing it to undergo elastic or plastic deformation under external force to adapt to different cross-sectional shapes in various applications. In actual sampling, the flat sampling tube 3 is pre-inserted into the sampling cylinder 2, with the bottom edge of the sampling tube 3 aligned with the bottom edge of the pressure block 5 inside the sampling cylinder 2. The remaining portion of the sampling tube 3 is located at the top of the sampling cylinder 2. Two sets of electric push rods 201 are installed inside the sampling cylinder 2, symmetrically arranged on both sides of the inner wall of the sampling cylinder 2. Each set contains three electric push rods 201, positioned vertically upwards... The middle-lower three-tier arrangement allows the two adsorption platforms 4 to move towards each other via an electric push rod 201, clamping and fixing the sampling tube 3 inside the sampling cylinder 2. The elastic recovery force of the silicone rubber sampling tube 3 and the continuous pushing force of the electric push rod 201 work together to keep the sampling tube 3 in a stable and flat state. The inner wall of the sampling tube 3 is completely squeezed and forms a "cavity-free" physical isolation, blocking the penetration path of pollutants. The air in the connecting pipe 401 and the adsorption platform 4 is extracted in advance by an external negative pressure device to form a negative pressure environment inside, so that the adsorption platform 4 can adsorb and fix the sampling tube 3. The cooperation between the pressure block 5 and the electric push rod 201 can also keep the bottom opening of the sampling tube 3 in a flat state. During the sampling process, the inside of the flat sampling tube 3 is clean. When the sampling tube 2 is placed into the water body to be sampled through the winding mechanism, it avoids interference from the outside air and different water layers. When it reaches the water layer to be sampled, the electric push rod 201 retracts, driving the pressure block 5 and the adsorption platform 4 to move away from the central axis of the sampling tube 2. At this time, the squeezing force on both sides of the sampling tube 3 gradually weakens, and under the adsorption of the adsorption platform 4, the bottom opening of the sampling tube 3 is open, and the channel inside the sampling tube 3 is also opened, so that the water sample can enter the inside of the sampling tube 3. Then, the electric push rod 201 drives the pressure block 5 to seal the openings on both sides of the sampling tube 3. Under the action of the squeezing force, the opening of the sampling tube 3 is completely sealed due to the squeezing. The opening of the sampling tube 3 is in a flat state to achieve self-sealing. Then, the electric heating tube 501 heat-seals the sealed part of the sampling tube 3. When the sampling tube 3 is made of silicone rubber, it can achieve a good heat-sealing effect under the vulcanization action. Thus, the sample collection can be completed underwater. The sampling position is the sealing position, which eliminates the risk of external air intervention and cross-contamination, and is not easily affected by other water layers, thus maintaining the accuracy and impartiality of the mineral water environment monitoring sampling work.

[0021] In this embodiment, as Figures 2-8As shown, the adsorption platform 4 is provided with adsorption holes arranged in a rectangular array on the surface. The opening shape of each adsorption hole is circular. A cavity is formed inside the adsorption platform 4, and the cavity is connected to all the adsorption holes. One end of the connecting pipe 401 is embedded in the cavity inside the adsorption platform 4 to realize the gas path connection between the cavity and the outside. The adsorption platform 4 has numerous adsorption holes, which firmly adsorb and fix the sampling tube 3. The dispersed and interconnected adsorption holes can prevent the sampling tube 3 from being torn due to excessive local suction, and reduce the accumulation of pollutants at the connection between the adsorption platform 4 and the sampling tube 3, thereby reducing the interference of pollutants on the sampling work. The connecting tube 401 and the sampling cylinder 2 can slide relative to each other, thereby adapting to the horizontal displacement of the adsorption platform 4. The negative pressure state of the internal cavity of the adsorption platform 4 can be controlled by a valve. Before sampling, the internal cavity of the adsorption platform 4 can be drawn to a negative pressure state by an external vacuum pump, thereby maintaining the adsorption platform 4 to adsorb and fix the sampling tube 3 for a long time without the need for underwater control, making the operation simple.

[0022] The sampling tube 3 is made of polyethylene, polypropylene, polyvinylidene chloride or polyester. A protective film 301 is attached to the outer surface of the sampling tube 3. The protective film 301 is made of the same material as the sampling tube 3. A peelable adhesive layer is provided between the sampling tube 3 and the protective film 301. The adhesive layer is used to peel off the outer film after sampling. The surface of the protective film 301 is provided with an easy-tear opening. The easy-tear opening is a preset linear weakening structure that extends along the axial direction of the protective film 301. It is used to guide the outer film to peel off along the adhesive layer after sampling, so as to expose the uncontaminated outer surface of the sampling tube 3 and keep the outer surface of the sampling tube 3 clean. When the sampling tube 3 is made of polyethylene, polypropylene, polyvinylidene chloride or polyester, it has the characteristics of being waterproof, elastic, not easily damaged and heat-sealed. It is suitable for this device to complete the sampling of water bodies in the mineral environment. After the sampling tube 3 completes the sampling and heat sealing operation underwater, it will come into contact with other water layers and outside air during the process of pulling it out of the water. Therefore, a protective membrane 301 is designed to isolate external impurities. External pollutants can first come into contact with the protective membrane 301. An adhesive layer is set between the protective membrane 301 and the sampling tube 3. When it is necessary to take out the water sample inside the sampling tube 3 later, the protective membrane 301 can be peeled off along the linear weakening structure on the surface of the protective membrane 301 to expose the outer surface of the sampling tube 3. If there is any adhesive layer or other pollutants left, they can be cleaned to keep the surface of the sampling tube 3 clean. Then, the water sample inside the sampling tube 3 can be taken out by puncturing the sampling tube 3 with a syringe. The protective film 301 can also enhance the overall strength of the sampling tube 3, making it less prone to damage and leakage, and safer. The linear weakening structure of the protective film 301 can be made by scoring, cutting or serrated notches to make it easy to tear and peel off.

[0023] The adsorption platform 4 includes a straight surface facing the central axis of the sampling tube 3, wherein the width of a single adsorption platform 4 is greater than the width of the sampling tube 3 in the flattened state, and the total transverse span of the adsorption holes on the sidewall of the adsorption platform 4 is less than the width of the sampling tube 3 in the flattened state. The flat surface of the adsorption platform 4 corresponds exactly to the flat state of the sampling tube 3. The surface of the adsorption platform 4 is smooth, and the adsorption holes also adopt circular openings to reduce sharp edges and corners, thus making it less likely to damage the sampling tube 3. The total horizontal span of the adsorption holes set on the adsorption platform 4 is less than the width of the sampling tube 3, which can make the adsorption holes fully cover the surface of the sampling tube 3, preventing the overall failure due to a single adsorption hole not being covered. When the adsorption platform 4 unfolds the sampling tube 3, the part of the sampling tube 3 not covered by the adsorption holes can move towards the middle of the adsorption platform 4 when the sampling tube 3 unfolds, and stretch under its own elasticity, thus facilitating the expansion of the sampling tube 3 from a flat state into a tubular shape, so that the water can naturally enter the interior of the sampling tube 3. During the collection process, the size of the bottom opening of the sampling tube 3 can be controlled by the two pressure blocks 5 inside the sampling tube 2. The bottom opening of the sampling tube 3 can be kept at a small opening to control the speed and flow rate of the water sample entering the sampling tube 3. Since the opening of the sampling tube 3 is set downward, the sampling tube 2 can also be kept in the water for a certain period of time according to the actual sampling needs, so that the water in the sampling tube 3 can be allowed to settle for a period of time, so that some mud and sand in the sampling tube 3 can be deposited at the lower part of the sampling tube 3. Then, the two adsorption platforms 4 squeeze the sampling tube 3 to discharge some water and mud and sand, so as to reduce the amount of mud and sand contained in the water sample. The adsorption holes of the adsorption platform 4 have an adsorption and fixing effect on the sampling tube 3. The sampling tube 3 within the coverage area of ​​the adsorption holes on the adsorption platform 4 has a region that is not affected by the tension generated when the adsorption platform 4 moves to one side. The elastic deformation generated when the sampling tube 3 is adsorbed and fixed in this region is small. When the sampling tube 3 is heat-sealed after sampling, the fixing effect of the adsorption platform 4 on the sampling tube 3 is released. The part of the sampling tube 3 that is not affected by the tension can deform adaptively to balance the tension in the rest of its position, thus making it less prone to breakage. Even when the temperature difference between the water body and the external environment is large, it can maintain good elastic margin redundancy, which is convenient for subsequent turnover.

[0024] The surface of the pressure block 5 has through holes arranged in a rectangular array. The internal structure of the pressure block 5 has a cavity that communicates with the through holes on its surface. A connecting pipe 502 is provided on the side wall of the pressure block 5. The connecting pipe 502 communicates with the cavity in the internal structure of the pressure block 5. The other end of the connecting pipe 502 passes through the sampling cylinder 2. A valve is provided at the end of the connecting pipe 502 that passes through the side wall of the sampling cylinder 2. An external vacuum pump draws negative pressure into the connecting tube 2 502 and the cavity inside the pressure block 5, allowing the pressure block 5 to adsorb and fix the sampling tube 3. When the opening of the sampling tube 3 is exactly in contact with the edge of the pressure block 5, the pressure block 5 can control the shape of the opening of the sampling tube 3. When the two pressure blocks 5 are close to each other, the shape of the opening of the sampling tube 3 can be controlled to be flat. When the two pressure blocks 5 are far apart, the shape of the opening of the sampling tube 3 can be controlled to be annular, thus ensuring that the water sample can flow naturally into the sampling tube 3. When the two adsorption platforms 4 move away from each other and open the internal cavity of the sampling tube 3, the sampling tube 3 will not retract upward because the part connecting the sampling tube 3 and the pressure block 5 is fixed. This allows the sampling tube 3 to maintain a stable connection with the pressure block 5, so that after the two pressure blocks 5 clamp the sampling tube 3 together, the sampling tube 3 can be heat-sealed by the electric heating tube 501.

[0025] Two partition plates 202 are respectively provided on both sides of the inside of the sampling tube 2. A single adsorption platform 4 is set between the two partition plates 202 on the same side. The pressure block 5 is set between the partition plate 202 and the horizontal inner wall of the sampling tube 2. The end of the partition plate 202 is connected to a protective sleeve 203. The partition plate 202 inside the sampling tube 2 can effectively limit the distance between the adsorption platform 4 and the pressure block 5, so that the adsorption platform 4 and the pressure block 5 will not interfere with each other when they move relative to each other. The sampling tube 3 is protected by the protective sleeve 203 with an arc end, which prevents the sampling tube 3 from contacting the edges of the adsorption platform 4 and the pressure block 5, thereby reducing the risk of damage to the sampling tube 3. When the sampling tube 3 is heat-sealed, the partition plate 202 can effectively prevent the heat on the pressure block 5 from being conducted to the adsorption platform 4, thereby reducing the impact of heat on the water collected in the sampling tube 3 and maintaining the stability of the sample.

[0026] The top of the sampling cylinder 2 is provided with a limiting component, which includes: a connecting seat 6, a roller 601 and a rotating roller 602. The connecting seat 6 is located on the top of the sampling cylinder 2. The connecting seat 6 is a tubular structure that runs through both the top and bottom ends. The two rollers 601 are respectively connected to the inner sides of the connecting seat 6. The rotating roller 602 is fastened to the upper part of the inner side of the connecting seat 6 by bolts. A strip-shaped hole is provided at the top center of the sampling cylinder 2, and the gap between the two rollers 601 is located directly above the strip-shaped hole at the top of the sampling cylinder 2. The sampling tube 3 is wrapped around the surface of the rotating roller 602. The rotating roller 602 can wind up and wrap the part of the sampling tube 3 that extends beyond the top of the sampling cylinder 2 to achieve the purpose of storage. The two rollers 601 can clamp and fix the sampling tube 3 between the rotating roller 602 and the sampling cylinder 2, further improving the stability of the sampling tube 3.

[0027] An electric push rod 7 is also provided on the outside of the sampling cylinder 2. The telescopic part of the electric push rod 7 is connected to a baffle 701. A support 702 is connected to the bottom of the baffle 701. A limit strip 703 is provided on the top edge of the baffle 701. The limit strip 703 is attached to the end of the connecting pipe 401. The position of the baffle 701 can be controlled by the electric push rod 2. When the baffle 701 is attached to the bottom of the sampling tube 2, it can act as a shield to reduce the invasion of external impurities into the sampling tube 3 and protect the sampling tube 3. When the sampling tube 2 is placed in the water, the baffle 701 also acts as a shield to reduce the impact of water flow on the sampling tube 3, which helps to keep the sampling tube 3 flat and thus reduces the need to collect water from unwanted bodies. When collecting water samples, the electric push rod 7 drives the baffle 701 to move. The baffle 701 and the sampling tube 2 maintain a certain distance. The bottom opening of the sampling tube 3 can contact the water body for collection. At this time, the baffle 701 plays a certain role in blocking the mud and sand at the bottom of the water body, thereby reducing the situation where the sampling tube 3 collects mud and sand. After collecting the water sample, the sampling tube 3 is heat-sealed. Then, the valves on the connecting pipe 401 and the connecting pipe 502 are released to allow outside air to enter the adsorption platform 4 and the pressure block 5. This releases the fixing effect of the adsorption platform 4 and the pressure block 5 on the sampling tube 3. At the same time, the electric push rod 201 retracts, and the heat-sealed sampling tube 3 can slide out from the bottom opening of the sampling cylinder 2. At this time, the electric push rod 7 drives the baffle 701 to move downward. The baffle 701 can support the sampling tube 3, thereby protecting the sampling tube 3 and facilitating its use. By setting the support 702, when the sampling tube 3 is placed on the ground, it plays an isolation role, reducing the contamination of foreign objects onto the baffle 701. The limiting strip 703 limits the connection tube 401 and prevents the connection tube 401 from opening before reaching the predetermined water depth, reducing unnecessary water or impurities from entering and remaining in the connection tube 401, reducing the influence of external factors on the connection tube 401, and helping to maintain the negative pressure state of the connection tube 401.

[0028] The pressure block 5 has a groove on one side facing the central axis of the sampling cylinder 2. There are two grooves, which are respectively located on the upper and lower sides of the side wall of the pressure block 5. The heating tube 501 is embedded in the groove of the side wall of the pressure block 5. A silicone protective pad 503 is provided at the opening of the groove of the side wall of the pressure block 5. The pressure block 5 is equipped with two heating elements 501, so when the sampling tube 3 is heat-sealed, two heat-sealed parts can be formed on the sampling tube 3 at the same time, which is more secure and less prone to damage, and has better sealing performance. By setting a protective pad 503 with good thermal conductivity, after the protective pad 503 is deformed under pressure, it can evenly conduct heat to the surface of the sampling tube 3 and play an isolation role, preventing the molten sampling tube 3 from sticking to the heating elements 501. At the same time, it also has a buffering and shock-absorbing function, which can prevent the heating elements 501 from being damaged due to rigid contact.

[0029] Furthermore, a sampling device for mineral environment monitoring is used as follows: S1: Place the bracket 1 firmly at the sampling point, and drive the two adsorption platforms 4 to move closer to each other by controlling the electric push rod 201 in the middle position inside the sampling tube 2, and clamp the sampling tube 3 by the two adsorption platforms 4. S2: By controlling the extension of the electric push rod 201 at the upper and lower positions inside the sampling tube 2, the pressure block 5 is moved, and the two opposing pressure blocks 5 clamp the sampling tube 3 together. S3: By connecting the external negative pressure device to the connecting pipe 401, the air in the internal cavity of the adsorption platform 4 is extracted, and a negative pressure state is formed in the internal cavity of the adsorption platform 4, so that the sampling tube 3 is adsorbed on the surface of the adsorption platform 4. S4: The sampling tube 2 is placed into the water body to a suitable water layer by the winding mechanism. The electric push rod 201 retracts and drives the pressure block 5 and the adsorption platform 4 away from the central axis of the sampling tube 2. The sampling tube 3 unfolds under the displacement of the adsorption platform 4, and the water body naturally enters the interior of the sampling tube 3. S5: The electric push rod 201 drives the pressure block 5 to move towards the central axis of the sampling tube 2, clamping the sampling tube 3 to achieve a seal. The electric heating tube 501 heat-seals the sampling tube 3 to further seal the sample. Then the sampling tube 3 can be removed.

Claims

1. A sampling device for mineral environment monitoring, comprising a support (1) and a winding / unwinding mechanism, wherein the winding / unwinding mechanism is disposed on the upper part of the support (1), characterized in that, The winding mechanism is connected to a sampling mechanism, which includes a sampling cylinder (2) and a sampling tube (3). The two ends of the sampling tube (3) form a first opening and a second opening, respectively. The internal channel of the sampling tube (3) passes through the first opening and the second opening. The sampling tube (3) passes through the middle of the sampling cylinder (2). Electric push rods (201) are provided on both sides of the inside of the sampling tube (2). The extension part of the electric push rod (201) located in the middle is connected to an adsorption platform (4). An adsorption hole is opened on one side wall facing the central axis of the sampling tube (2). An adsorption hole is provided inside the adsorption platform (4). A cavity connected to its own adsorption hole is provided on the side wall of the adsorption platform (4). A connecting pipe (401) penetrating the side wall of the sampling tube (2) is provided on the side wall of the adsorption platform (4). A valve is provided at one end of the connecting pipe (401) penetrating the side wall of the sampling tube (2). A sealing mechanism is provided at the top and bottom of the adsorption platform (4). The sealing mechanism includes a pressure block (5) and an electric heating tube (501). The pressure block (5) is connected to the extension and retraction parts of the electric push rod (201) on the upper and lower sides inside the sampling cylinder (2). The electric heating tube (501) is fixedly installed on the surface of the pressure block (5).

2. The sampling equipment for mineral environment monitoring according to claim 1, characterized in that: The adsorption platform (4) is provided with adsorption holes arranged in a rectangular array on the surface. The opening shape of each adsorption hole is circular. The adsorption platform (4) forms a cavity inside, and the cavity is connected to all the adsorption holes. One end of the connecting pipe (401) is embedded in the cavity inside the adsorption platform (4) to realize the connection between the cavity and the external gas path.

3. The sampling equipment for mineral environment monitoring according to claim 2, characterized in that: The sampling tube (3) is made of polyethylene, polypropylene, polyvinylidene chloride or polyester material. A protective film (301) is attached to the outer surface of the sampling tube (3). The protective film (301) is made of the same material as the sampling tube (3). A peelable adhesive layer is provided between the sampling tube (3) and the protective film (301). The adhesive layer is used to peel off the outer film after sampling. The surface of the protective film (301) is provided with an easy-tear opening. The easy-tear opening is a preset linear weakening structure that extends along the axial direction of the protective film (301). It is used to guide the outer film to peel off along the adhesive layer after sampling, exposing the uncontaminated surface of the sampling tube (3) to maintain the cleanliness of the outer surface of the sampling tube (3).

4. The sampling device for mineral environment monitoring according to claim 3, characterized in that: The adsorption platform (4) includes a straight surface facing the central axis of the sampling tube (3), wherein the width of a single adsorption platform (4) is greater than the width of the sampling tube (3) in the flattened state, and the total transverse span of the adsorption holes on the sidewall of the adsorption platform (4) is less than the width of the sampling tube (3) in the flattened state.

5. The sampling equipment for mineral environment monitoring according to claim 1, characterized in that: The surface of the pressure block (5) is constructed with through holes arranged in a rectangular array. The interior of the pressure block (5) is constructed with a cavity that communicates with the through holes on its surface. A connecting pipe (502) is provided on the side wall of the pressure block (5). The connecting pipe (502) communicates with the cavity in the interior of the pressure block (5). The other end of the connecting pipe (502) passes through the sampling cylinder (2). A valve is provided at one end of the connecting pipe (502) that passes through the side wall of the sampling cylinder (2).

6. The sampling device for mineral environment monitoring according to claim 1, characterized in that: Two partition plates (202) are respectively provided on both sides of the inside of the sampling tube (2). A single adsorption platform (4) is set between the two partition plates (202) on the same side. The pressure block (5) is set between the partition plate (202) and the horizontal inner wall of the sampling tube (2). The end of the partition plate (202) is connected to a protective sleeve (203).

7. The sampling device for mineral environment monitoring according to claim 1, characterized in that: The top of the sampling cylinder (2) is provided with a limiting component, which includes: a connecting seat (6), a roller (601) and a rotating roller (602). The connecting seat (6) is located on the top of the sampling cylinder (2). The connecting seat (6) is a tubular structure with both ends connected. The two rollers (601) are respectively connected to the inner sides of the connecting seat (6). The rotating roller (602) is fastened to the upper part of the connecting seat (6) by bolts. The sampling cylinder (2) has a strip-shaped hole at the top center, and the gap between the two rollers (601) is located directly above the strip-shaped hole at the top of the sampling cylinder (2). The sampling tube (3) is wrapped around the surface of the rotating roller (602).

8. The sampling equipment for mineral environment monitoring according to claim 1, characterized in that: An electric push rod 2 (7) is also provided on the outside of the sampling tube (2). The telescopic part of the electric push rod 2 (7) is connected to a baffle (701). A support (702) is connected to the bottom of the baffle (701). A limit strip (703) is provided on the top edge of the baffle (701). The limit strip (703) is attached to the end of the connecting pipe 1 (401).

9. The sampling device for mineral environment monitoring according to claim 1, characterized in that: The pressure block (5) has a groove on one side facing the central axis of the sampling cylinder (2). There are two grooves, which are respectively located on the upper and lower sides of the side wall of the pressure block (5). The heating tube (501) is embedded in the groove of the side wall of the pressure block (5). A silicone protective pad (503) is provided at the opening of the groove of the side wall of the pressure block (5).

10. The method of using the sampling equipment for mineral environment monitoring according to any one of claims 1-9, characterized in that: S1: Place the bracket (1) firmly at the sampling point, and drive the two adsorption platforms (4) to move closer to each other by controlling the electric push rod (201) in the middle position inside the sampling tube (2), and clamp the sampling tube (3) by the two adsorption platforms (4). S2: By controlling the extension of the electric push rod 1 (201) at the upper and lower positions inside the sampling tube (2), the pressure block (5) is moved, and the two opposing pressure blocks (5) clamp the sampling tube (3) together. S3: By connecting the external negative pressure device to the connecting pipe 1 (401), the air in the cavity inside the adsorption platform (4) is extracted, and the cavity inside the adsorption platform (4) forms a negative pressure state, so that the sampling tube (3) is adsorbed on the surface of the adsorption platform (4). S4: The sampling tube (2) is placed into the water body to a suitable water layer by the winding mechanism. The electric push rod (201) retracts and drives the pressure block (5) and the adsorption platform (4) away from the central axis of the sampling tube (2). The sampling tube (3) unfolds under the displacement of the adsorption platform (4), and the water body naturally enters the interior of the sampling tube (3). S5: Drive the pressure block (5) to move towards the central axis of the sampling tube (2) by the electric push rod (201) to clamp the sampling tube (3) to achieve sealing. Heat seal the sampling tube (3) by the electric heating tube (501) to further seal the sample. Then take out the sampling tube (3).

Images