A device for collecting and detecting volatile organic compounds in salt lake brine

Abstract

This invention belongs to the field of salt lake brine collection technology, specifically relating to a device for collecting and detecting volatile organic compounds (VOCs) in salt lake brine. It includes a mixing tank, the sidewall of which is fixedly connected to the bottom of an annular water tank via multiple water pipes; the bottom of the mixing tank is fixedly connected to the top of a collection tank via a transfer pipe; a solid-phase extraction column is installed inside the collection tank, and a miniature water pump is connected to the bottom of the collection tank; an electronic valve and a flow sensor are installed on the transfer pipe. This invention reduces the volatilization of VOCs in salt lake brine during collection and prevents blockage caused by excessively high brine concentrations. It avoids blockage caused by excessively high brine concentrations while ensuring that the brine concentration is not too low to affect VOC collection. This invention is suitable for collecting organic matter from salt lake brine of unknown concentration.

Description

Technical Field

[0001] This invention belongs to the field of salt lake brine collection technology, specifically relating to a device for collecting and detecting volatile organic compounds in salt lake brine. Background Technology

[0002] Salt lake brine refers to highly mineralized aqueous solutions in salt lakes, rich in various chemical elements such as potassium, lithium, magnesium, and sodium. As an important carrier of mineral resources, salt lake brine holds significant strategic importance in my country's industrial raw material supply and new energy material development. With the rapid development of the new energy industry, the demand for lithium resources is increasing, and the development and utilization of lithium resources in salt lake brine has become one of the important sources of replenishment.

[0003] During the mineralization process in salt lakes, various volatile organic compounds (VOCs) are formed in the brine due to factors such as biodegradation and geological activity. These VOCs may originate from biological metabolites, organic matter degradation, and deep fluid transport during geological tectonic activity. Studies have shown that the types, contents, and distribution characteristics of VOCs in salt lake brines are closely related to the mineralization environment and degree of mineralization. Therefore, systematic collection and detection of VOCs in salt lake brines can provide important geochemical indicators for the exploration of salt lake mineral resources.

[0004] Traditional salt lake brine exploration relies primarily on hydrogeological surveys and geophysical measurements. While reliable, these methods are often time-consuming and costly. However, using volatile organic compound (VOC) detection as an auxiliary method allows for the rapid acquisition of chemical characteristics of salt lake brine, providing a scientific basis for selecting exploration targets and determining mining strategies. Particularly during large-scale salt lake resource surveys, VOC detection serves as a crucial tool for rapid screening, improving exploration efficiency and reducing costs.

[0005] Chinese patent application number 202411203716.1 discloses a self-sealing device for sampling brine from salt lakes based on a drone. The device includes a drone body and a self-sealing device comprising an upper cap, a middle cap, a lower cap, a bottle body, a bottle bottom, and a piston body for sealing after water collection. The middle of the cap is a circular gasket, with an insulated and tightly sealed metal rod for detecting liquid level running vertically through the center of the gasket. This patent enables automatic sampling of lake water using a drone and self-sealing of the sample after collection, preventing sample spillage due to drone tilting during flight. This increases the stability and sealing of lake water sampling. The structure is simple and low-cost. Except for a relay-based instantaneous power-on detection module, no other sensors or associated radio signal transmitters are used. Furthermore, the drone body can accommodate more self-sealing devices, achieving the effect of multiple independent sampling points in a single flight.

[0006] Current methods for sampling brine from salt lakes typically involve sampling the surface brine. However, this method is prone to evaporation of volatile organic compounds (VOCs), leading to inaccurate VOC detection. Furthermore, when using solid-phase extraction (SPE) columns for adsorption sampling, the high salinity of the brine causes the columns to easily become clogged, making sampling difficult. Diluting the brine with water presents several problems: First, excessively low concentrations can lead to inaccurate VOC detection. Second, dilution is usually performed separately after brine collection, resulting in the loss of VOCs from the sampled brine. Additionally, when sampling brine of unknown concentration, it is difficult to quickly determine whether dilution with water is necessary, further complicating the sampling process. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a device for collecting and detecting volatile organic compounds (VOCs) in salt lake brine. This invention, through the cooperation of a collection box, an annular water tank, a mixing box, and a connecting pipe mechanism, reduces the volatilization of VOCs in the salt lake brine during collection and prevents blockages caused by excessively high brine concentrations. Furthermore, the cooperation of a control mechanism with the connecting pipe mechanism and the mixing box avoids blockages caused by excessively high brine concentrations while ensuring that the brine concentration is not too low at the time of collection, thus preventing interference with VOC collection. This invention, through the cooperation of the control mechanism, the connecting pipe mechanism, and the mixing box, is suitable for collecting organic matter from salt lake brine of unknown concentration.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A device for collecting and detecting volatile organic compounds in salt lake brine includes a mixing tank, the sidewall of which is fixedly connected to the bottom of an annular water tank via multiple water pipes; the bottom of the mixing tank is fixedly connected to the top of a collection tank via a transfer pipe; a solid-phase extraction column is installed inside the collection tank, and a micro water pump is connected to the bottom of the collection tank; an electronic valve and a flow sensor are installed on the transfer pipe.

[0010] The tops of the collection box, the annular water tank, and the mixing box are all fixedly connected by a connecting pipe mechanism; the top of the connecting pipe mechanism is fixedly connected to a ventilator, one end of which is located above the water body being collected.

[0011] An electric telescopic rod is fixedly installed at the top of the ventilation cylinder, and a control mechanism is slidably connected inside the ventilation cylinder. One end of the electric telescopic rod is fixedly connected to the control mechanism and is used to control the opening and closing of the connecting pipe mechanism.

[0012] Furthermore, the control mechanism includes a slide rod, with its two ends passing through the corresponding ends of the ventilator; a sealing plug is fixedly connected to the slide rod, and the sealing plug is slidably connected to the interior of the ventilator; a sliding tube is fixedly connected to the lower end of the slide rod, the upper end of the sliding tube is closed, and multiple first connecting holes are evenly opened on the side wall of the sliding tube; a sealing cover is fixedly connected to the lower end of the sliding tube, and multiple filter holes are opened on the top of the sealing cover.

[0013] Furthermore, the top of the mixing tank is fixedly connected to an inlet pipe, and the side wall of the inlet pipe is evenly provided with a plurality of second connecting holes; the sliding tube is slidably connected to the inner wall of the inlet pipe; and the sealing cover is slidably connected to the inner wall of the mixing tank.

[0014] Furthermore, when the sealing plug does not close the connecting pipe mechanism, the first connecting hole and the second connecting hole are connected, and the sealing cover closes the water pipe; when the sealing plug closes the connecting pipe mechanism, the first connecting hole and the second connecting hole are misaligned and not connected, and the sealing cover does not close the water pipe.

[0015] Furthermore, the connecting pipe mechanism includes an n-type pipe I and an n-type pipe II. The two ends of the n-type pipe I are fixedly connected to the top of the collection box and the top of the mixing box, respectively. The two ends of the n-type pipe II are fixedly connected to the top of the n-type pipe I and the top of the annular water tank, respectively. The top of the n-type pipe II is fixedly connected to the side wall of the ventilation cylinder through a branch pipe.

[0016] Furthermore, there are multiple connecting pipe mechanisms, which are evenly distributed around the mixing tank.

[0017] Furthermore, the top of the annular water tank is fixedly provided with a water inlet, and a valve is installed on the water inlet.

[0018] Furthermore, the upper end of the ventilator is provided with multiple ventilation mesh holes, and a bracket is fixedly connected to the upper end of the ventilator, with an electric telescopic rod fixedly installed on the bracket; an operating panel is fixedly provided on the outer side of the ventilator.

[0019] Furthermore, the collection box has an opening on one side, and an insulated box is sealed and inserted into the opening; a receiving groove is provided through the insulated box for receiving the solid phase extraction column; the top of the collection box is fixedly connected to the intermediate cylinder, and the top of the intermediate cylinder is fixedly connected to the transfer tube; the bottom of the collection box is connected to the micro water pump through an L-shaped pipe.

[0020] This invention also claims a method for collecting volatile organic compounds in salt lake brine using the aforementioned device, comprising the following steps:

[0021] S1. Place the device into the brine of the salt lake. The brine enters the mixing box through the first and second connecting holes and is filtered by the filter holes of the sealed cover. The brine enters the collection box through the transfer pipe. The micro water pump is started to make the brine adsorbed through the solid phase extraction column and discharged.

[0022] S2. When the flow sensor detects blockage in the collection box, it activates the electric telescopic rod to retract, causing the sealing plug to close the connecting pipe mechanism. At this time, the first connecting hole and the second connecting hole are misaligned and not connected, and the sealing cover does not close the water pipe. The brine from the salt lake no longer flows into the mixing tank, and the water in the annular water tank enters the mixing tank and collection box through the water pipe to flush and dilute them, restoring the collection box to unobstructed flow.

[0023] S3. When the flow sensor detects that the flow is unobstructed, the electronic valve is closed and the electric telescopic rod is extended to connect the first and second connecting holes and the water pipe opening. This controls the proportion of water in the mixing tank and brine in the salt lake to be diluted. After dilution, the electronic valve is opened for subsequent data collection.

[0024] S4. After the collection is completed, close the electronic valve and control the electric telescopic rod to extend and seal the water pipe, then remove the equipment from the brine of the salt lake.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) This invention, through the cooperation of a collection box, an annular water tank, a mixing box, and a connecting pipe mechanism, reduces the volatilization of volatile organic compounds in the brine during the collection process and prevents blockage caused by excessively high brine concentration. Specifically, when collecting brine, the device is placed in the brine to collect the internal brine. The connecting pipe mechanism connects the brine to the external air, allowing it to smoothly enter the mixing box and collection box for multiple processing cycles, avoiding pressure issues that could prevent the brine from flowing smoothly. Furthermore, a micro water pump... The device's function is to dilute brine in a mixing tank, extract it using a solid-phase extraction column in a collection tank, and finally discharge it using a micro-pump. This allows for closed-loop sampling, dilution, and collection of brine within the brine body. Furthermore, because the device operates within the brine body, the entire sampling, dilution, and collection process is almost entirely within a closed space. This reduces the volatilization of volatile organic compounds during collection and simultaneously dilutes the brine within the body, preventing blockages caused by excessively high brine concentrations.

[0027] (2) This invention, through the cooperation of the control mechanism, the connecting pipe mechanism, and the mixing box, avoids the blockage problem caused by excessively high salt lake brine concentration during the collection process, while ensuring that the concentration of salt lake brine is not too low during collection, thus affecting the collection of volatile organic compounds. Specifically, when the flow sensor detects blockage in the collection box, the electric telescopic rod is activated to retract, causing the sealing plug to close the connecting pipe mechanism. At this time, the first connecting hole and the second connecting hole are misaligned and not connected, and the sealing cover does not close the water pipe. Salt lake brine no longer flows into the mixing box, and the water in the annular water tank enters the mixing box and the collection box through the water pipe to rinse and dilute the salt, restoring the smooth flow of the collection box. This not only avoids the blockage problem caused by excessively high salt lake brine concentration during the collection process, but also ensures that the concentration of salt lake brine is not too low during collection by first using a solid phase extraction column for adsorption and then rinsing to dilute the salt, thus preventing the collection of volatile organic compounds from being affected.

[0028] (3) This invention, through the cooperation of the control mechanism, the connecting pipe mechanism, and the mixing box, is suitable for the collection of organic matter in salt lake brine of unknown concentration. Specifically, when the concentration of salt lake brine is low, the salt lake brine can be passed through the mixing box and the collection box in sequence. When the concentration of salt lake brine is high, problems such as salt precipitation may occur, causing blockage. At this time, the control mechanism is used to flush and dilute the brine to restore the smooth flow. Then, the ratio of water in the mixing box to salt lake brine is controlled to dilute the brine, so that the concentration of salt lake brine is not too low when it is collected, and the collection of volatile organic matter is not affected, thereby achieving continuous collection and avoiding frequent blockage problems. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention;

[0030] Figure 2 This is a schematic diagram of the dispersion structure of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention;

[0031] Figure 3 This is a schematic cross-sectional view of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention.

[0032] Figure 4 This is a schematic diagram of the annular water tank structure of a salt lake brine volatile organic compound collection and detection device according to the present invention;

[0033] Figure 5 This is a partial structural diagram of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention. Figure 1 ;

[0034] Figure 6 This is a partial structural diagram of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention. Figure 2;

[0035] Figure 7 This is a partial dispersion structure diagram of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention. Figure 1 ;

[0036] Figure 8 This is a partial dispersion structure diagram of a device for collecting and detecting volatile organic compounds in salt lake brine according to the present invention. Figure 2 .

[0037] The attached figures are labeled as follows:

[0038] 100-Annular water tank, 110-Water inlet, 120-Water pipe, 200-Mixing tank, 210-Liquid inlet pipe, 220-Second connecting hole, 300-Collection box, 310-Insulation box, 320-Containing tank, 330-Intermediate cylinder, 340-Transfer pipe, 400-Miniature water pump, 410-L-shaped pipe, 500-Ventilator, 510-Ventilation mesh, 520-Operating panel, 600-Electric telescopic rod, 610-Support, 700-Control mechanism, 710-Sliding rod, 720-Sealing plug, 730-Sliding tube, 731-First connecting hole, 740-Sealing cover, 800-Connecting pipe mechanism, 810-Type n-shaped tube one, 820-Type n-shaped tube two, 830-Branch pipe, 900-Solid phase extraction column. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0041] Example

[0042] like Figures 1 to 8 As shown, a device for collecting and detecting volatile organic compounds in salt lake brine includes a mixing tank 200. The side wall of the mixing tank 200 is fixedly connected to the bottom of an annular water tank 100 via multiple water pipes 120. The bottom of the mixing tank 200 is fixedly connected to the top of a collection tank 300 via a transfer pipe 340. A solid-phase extraction column 900 is installed inside the collection tank 300, and a micro water pump 400 is connected and installed at the bottom of the collection tank 300. An electronic valve and a flow sensor are installed on the transfer pipe 340.

[0043] It is worth noting that the micro water pump 400, electronic valve and other electrical equipment of this invention are all powered by an external power source, and the flow sensor can monitor the flow rate. These are all existing technologies and will not be described in detail here.

[0044] The tops of the collection box 300, the annular water tank 100, and the mixing box 200 are all fixedly connected by a connecting pipe mechanism 800; the top of the connecting pipe mechanism 800 is fixedly connected to a ventilator 500, one end of which is located above the collected water body.

[0045] An electric telescopic rod 600 is fixedly installed at the top of the ventilation cylinder 500. A control mechanism 700 is slidably connected inside the ventilation cylinder 500. One end of the electric telescopic rod 600 is fixedly connected to the control mechanism 700 and is used to control the opening and closing of the connecting pipe mechanism 800.

[0046] This invention, through the cooperation of the collection box 300, the annular water tank 100, the mixing box 200, and the connecting pipe mechanism 800, reduces the volatilization of volatile organic compounds in the brine during the collection process and prevents blockages caused by excessively high brine concentration. Specifically, when collecting brine, the device is placed in the brine to collect the internal brine. The connecting pipe mechanism 800 connects the brine to the external air, allowing it to smoothly enter the mixing box 200 and the collection box 300 for multiple processing cycles, avoiding pressure issues that could prevent the brine from flowing smoothly. A micro water pump 4 further facilitates the process. The function of the device is to dilute the brine in the mixing tank 200, extract it by the solid-phase extraction column 900 in the collection tank 300, and finally discharge it by the micro water pump 400. This allows for closed-loop sampling, dilution, and collection of the brine within the water body. Furthermore, because the device operates within the brine body, it operates in a nearly enclosed space throughout the sampling, dilution, and collection process. This reduces the volatilization of volatile organic compounds in the brine during collection and simultaneously dilutes the brine within the water body, preventing blockages caused by excessively high brine concentrations.

[0047] Furthermore, the control mechanism 700 includes a slide rod 710, with both ends of the slide rod 710 passing through the corresponding ends of the ventilator 500; a sealing plug 720 is fixedly connected to the slide rod 710, and the sealing plug 720 is slidably connected to the interior of the ventilator 500; a sliding tube 730 is fixedly connected to the lower end of the slide rod 710, the upper end of the sliding tube 730 is closed, and a plurality of first connecting holes 731 are evenly opened on the side wall of the sliding tube 730; a sealing cover 740 is fixedly connected to the lower end of the sliding tube 730, and a plurality of filter holes are opened on the top of the sealing cover 740.

[0048] Furthermore, the top of the mixing tank 200 is fixedly connected to an inlet pipe 210, and the side wall of the inlet pipe 210 is evenly provided with a plurality of second connecting holes 220; the sliding pipe 730 is slidably connected to the inner wall of the inlet pipe 210; and the sealing cover 740 is slidably connected to the inner wall of the mixing tank 200.

[0049] Furthermore, when the sealing plug 720 does not close the connecting pipe mechanism 800, the first connecting hole 731 and the second connecting hole 220 are connected, and the sealing cover 740 closes the water pipe 120; when the sealing plug 720 closes the connecting pipe mechanism 800, the first connecting hole 731 and the second connecting hole 220 are misaligned and not connected, and the sealing cover 740 does not close the water pipe 120.

[0050] This invention, through the cooperation of the control mechanism 700, the connecting pipe mechanism 800, and the mixing tank 200, avoids the blockage problem caused by excessively high concentration of brine during the collection process, while ensuring that the concentration of brine is not too low during collection, thus affecting the collection of volatile organic compounds. Specifically, when the flow sensor detects blockage in the collection tank 300, the electric telescopic rod 600 is activated to retract, causing the sealing plug 720 to close the connecting pipe mechanism 800. At this time, the first connecting hole 731 and the second connecting hole 220 are misaligned and not connected, and the sealing cover 740 does not close the water pipe 120; brine no longer flows into the mixing tank. The mixing tank 200 and the annular water tank 100 are connected at the top by a connecting pipe mechanism 800. Water from the annular water tank 100 can enter the mixing tank 200 and the collection tank 300 through the water pipe 120 to flush and dilute the salt, thus restoring the unobstructed flow of the collection tank 300. This avoids the problem of blockage during the collection process caused by excessively high concentrations of brine in the salt lake. At the same time, by first adsorbing the brine with a solid-phase extraction column 900 and then flushing to dilute the salt, the blockage problem is solved, ensuring that the concentration of the brine in the salt lake is not too low when it is collected, thereby affecting the collection of volatile organic compounds.

[0051] Furthermore, the connecting pipe mechanism 800 includes a first type n-shaped pipe 810 and a second type n-shaped pipe 820. The two ends of the first type n-shaped pipe 810 are fixedly connected to the top of the collection box 300 and the top of the mixing box 200, respectively. The two ends of the second type n-shaped pipe 820 are fixedly connected to the top of the first type n-shaped pipe 810 and the top of the annular water tank 100, respectively. The top of the second type n-shaped pipe 820 is fixedly connected to the side wall of the ventilation cylinder 500 through a branch pipe 830.

[0052] The tops of the annular water tank 100, the mixing tank 200, and the collection tank 300 are all connected by the connecting pipe mechanism 800, allowing the brine from the salt lake to flow smoothly within the device located inside the water body being collected.

[0053] Furthermore, there are multiple connecting pipe mechanisms 800, which are evenly distributed around the mixing tank 200. These multiple connecting pipe mechanisms 800 not only achieve the function of communication but also serve as supports, improving the overall stability of the equipment.

[0054] Furthermore, the top of the annular water tank 100 is fixedly provided with a water inlet 110, and a valve is installed on the water inlet 110. The water inlet 110 and the valve facilitate water replenishment to the annular water tank 100. When the equipment is collecting data, the valve is closed; when the equipment is idle, water can be replenished through the water inlet 110.

[0055] Furthermore, the upper end of the ventilation cylinder 500 is provided with multiple ventilation mesh holes 510, and a bracket 610 is fixedly connected to the upper end of the ventilation cylinder 500. The electric telescopic rod 600 is fixedly installed on the bracket 610. An operating panel 520 is fixedly provided on the outer side of the ventilation cylinder 500. The operating panel 520 facilitates connection with external ropes or other equipment, thereby facilitating the placement of the entire device into the water body to be collected.

[0056] Furthermore, the collection box 300 has an opening on one side, and an insulation box 310 is sealed and inserted into the opening. A receiving groove 320 is provided through the insulation box 310 for accommodating the solid-phase extraction column 900. The top of the collection box 300 is fixedly connected to an intermediate cylinder 330, and the top of the intermediate cylinder 330 is fixedly connected to a transfer pipe 340. The bottom of the collection box 300 is connected to a micro water pump 400 via an L-shaped pipe 410. The insulation box 310 can keep the solid-phase extraction column 900 warm, preventing the loss of volatile organic compounds due to external temperature fluctuations after collection.

[0057] A method for collecting volatile organic compounds in salt lake brine using the aforementioned device includes the following steps:

[0058] S1. The device is placed in the brine of the salt lake. The brine enters the mixing box 200 through the first connecting hole 731 and the second connecting hole 220 and is filtered by the filter hole of the sealing cover 740. The brine enters the collection box 300 through the transfer pipe 340. The brine is adsorbed and discharged by the solid phase extraction column 900 by starting the micro water pump 400.

[0059] S2. When the flow sensor detects that the collection box 300 is blocked, the electric telescopic rod 600 is activated to retract, causing the sealing plug 720 to close the connecting pipe mechanism 800. At this time, the first connecting hole 731 and the second connecting hole 220 are misaligned and not connected, and the sealing cover 740 does not close the water pipe 120. The brine from the salt lake no longer flows into the mixing box 200, and the water in the annular water tank 100 enters the mixing box 200 and the collection box 300 through the water pipe 120 to flush and dilute it, so that the collection box 300 is unobstructed.

[0060] S3. When the flow sensor detects that the flow is unobstructed, the electronic valve is closed and the electric telescopic rod 600 is extended to connect the first connecting hole 731 and the second connecting hole 220, and the water pipe 120 is partially connected. This controls the proportion of water and salt lake brine entering the mixing tank 200 for dilution. After dilution, the electronic valve is opened for subsequent data collection.

[0061] S4. After the collection is completed, close the electronic valve and control the electric telescopic rod 600 to extend so that the water pipe 120 is closed, and take the equipment out of the salt lake brine.

[0062] This invention, through the cooperation of the control mechanism 700, the connecting pipe mechanism 800, and the mixing tank 200, is suitable for collecting organic matter from salt lake brine of unknown concentration. Specifically, when the concentration of salt lake brine is low, the brine can be passed sequentially through the mixing tank 200 and the collection tank 300. When the concentration of salt lake brine is high, problems such as salt precipitation may occur, leading to blockages. In this case, the control mechanism 700 is used to flush and dilute the brine to restore its flow. Then, the ratio of water to brine entering the mixing tank 200 is controlled to dilute the brine, ensuring that the concentration of the brine is not too low when collected, thus preventing the collection of volatile organic compounds and enabling continuous collection while avoiding frequent blockages.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A device for collecting and detecting volatile organic compounds in salt lake brine, characterized in that, The application relates to a water sampling device, which comprises a mixing box (200), the side wall of the mixing box (200) is fixedly communicated with the bottom of a ring-shaped water tank (100) through a plurality of water pipes (120), the bottom of the mixing box (200) is fixedly communicated with the top of a collecting box (300) through an adapter pipe (340), a solid-phase extraction column (900) is arranged in the collecting box (300), a micro water pump (400) is arranged at the bottom of the collecting box (300), an electronic valve and a flow sensor are arranged on the adapter pipe (340); The top of the collecting box (300), the ring-shaped water tank (100) and the mixing box (200) are fixedly communicated through a communication pipe mechanism (800), a gas cylinder (500) is fixedly communicated at the top of the communication pipe mechanism (800), and one end of the gas cylinder (500) is located above the collected water body; An electric telescopic rod (600) is fixedly arranged at the top end of the gas cylinder (500), a control mechanism (700) is slidably connected in the gas cylinder (500), one end of the electric telescopic rod (600) is fixedly connected with the control mechanism (700), and the electric telescopic rod (600) is used for controlling the opening and closing of the communication pipe mechanism (800); The control mechanism (700) comprises a sliding rod (710), the two ends of the sliding rod (710) pass through the corresponding two ends of the gas cylinder (500) respectively, a sealing plug (720) is fixedly connected on the sliding rod (710), the sealing plug (720) is slidably connected with the inside of the gas cylinder (500), the lower end of the sliding rod (710) is fixedly connected with a sliding pipe (730), the upper end of the sliding pipe (730) is closed, a plurality of first communication holes (731) are uniformly formed in the side wall of the sliding pipe (730), the lower end of the sliding pipe (730) is fixedly communicated with a sealing cover (740), and a plurality of filter holes are formed in the top of the sealing cover (740); A liquid inlet pipe (210) is fixedly communicated at the top end of the mixing box (200), a plurality of second communication holes (220) are uniformly formed in the side wall of the liquid inlet pipe (210), the sliding pipe (730) and the inner wall of the liquid inlet pipe (210) are slidably connected, and the sealing cover (740) and the inner wall of the mixing box (200) are slidably connected; When the sealing plug (720) does not close the communication pipe mechanism (800), the first communication holes (731) and the second communication holes (220) are communicated, and the sealing cover (740) closes the water pipes (120); when the sealing plug (720) closes the communication pipe mechanism (800), the first communication holes (731) and the second communication holes (220) are misaligned and not communicated, and the sealing cover (740) does not close the water pipes (120); The communication pipe mechanism (800) comprises an n-shaped pipe one (810) and an n-shaped pipe two (820), the two ends of the n-shaped pipe one (810) are fixedly communicated with the top of the collecting box (300) and the top of the mixing box (200) respectively, the two ends of the n-shaped pipe two (820) are fixedly communicated with the top of the n-shaped pipe one (810), the top of the ring-shaped water tank (100) and the top of the n-shaped pipe two (820) respectively, and the top of the n-shaped pipe two (820) is fixedly communicated with the side wall of the gas cylinder (500) through a branch pipe (830).

2. The device for collecting and detecting volatile organic compounds in salt lake brine according to claim 1, characterized in that, The communication pipe mechanism (800) is multiple and is uniformly distributed along the periphery of the mixing box (200).

3. The device for collecting and detecting volatile organic compounds in salt lake brine according to claim 1, characterized in that, The top of the annular water tank (100) is fixedly provided with a water inlet (110), and a valve is installed on the water inlet (110).

4. The device for collecting and detecting volatile organic compounds in salt lake brine according to claim 1, characterized in that, A plurality of vent mesh holes (510) are formed in the upper end of the vent cylinder (500), and a support (610) is fixedly connected to the upper end of the vent cylinder (500), and an electric telescopic rod (600) is fixedly installed on the support (610); an operation disc (520) is fixedly arranged on the outer side of the vent cylinder (500).

5. The device of claim 1, wherein, A box opening is formed in one side of the collection box (300), and a heat preservation box (310) is sealingly inserted into the box opening; a containing groove (320) is formed in the heat preservation box (310) and used for containing a solid phase extraction column (900); an intermediate cylinder (330) is fixedly connected to the top of the collection box (300), and the top of the intermediate cylinder (330) is fixedly connected with an adapter pipe (340); and the bottom of the collection box (300) is connected and installed with a micro water pump (400) through an L-shaped pipe (410).

6. A method for collecting volatile organic compounds in salt lake brine using the collection and detection device according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: S1, the device is placed in the salt lake brine, the salt lake brine enters the mixing box (200) from the first communication hole (731) and the second communication hole (220) and is filtered by the filter hole of the sealing cover (740); the salt lake brine enters the collection box (300) through the adapter pipe (340), and the salt lake brine is adsorbed by the solid phase extraction column (900) and discharged by starting the micro water pump (400); S2, when the flow sensor detects that the collection box (300) is blocked, the electric telescopic rod (600) is retracted to make the sealing plug (720) close the communication pipe mechanism (800), at this time, the first communication hole (731) and the second communication hole (220) are misaligned and not connected, and the sealing cover (740) does not close the water pipe (120); the salt lake brine no longer flows into the mixing box (200), and the water body of the annular water tank (100) enters the mixing box (200) and the collection box (300) to flush and dilute, so that the collection box (300) recovers to be unblocked; S3, when the flow sensor detects that it is unblocked, the electronic valve is closed, and the electric telescopic rod (600) is elongated to make the first communication hole (731) and the second communication hole (220) partially connected, and the water pipe (120) partially connected, so as to control the mixing box (200) and the salt lake brine to enter in proportion for dilution, and after dilution, the electronic valve is opened for subsequent collection; S4, after the collection is completed, the electronic valve is closed, and the electric telescopic rod (600) is elongated to close the water pipe (120), and the device is taken out of the salt lake brine.

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