A soil and water pollutant detection device

Abstract

The present invention relates to the technical field of detection devices, and the present application discloses a soil and water pollutant detection device, including a gas chromatograph body and a cabinet door, wherein the top surface of the sampling port on the top of the gas chromatograph body is fixed with a fixed flange by bolts, and the side of the gas chromatograph body is provided with a sample tray, and the top surface of the sample tray is provided with a plurality of sample placement slots at equal intervals, and the bottom of the sample tray is detachably fixed to the top surface of the support frame. The present invention adopts a sealed sampling design, and when testing soil and water quality, after the treated sample box is placed in the sample tray and sealed, the sampling is completed without opening the sample tray and exposing the liquid inlet needle and the liquid discharge needle, thereby avoiding the exposure of the sample during the transfer during the sampling, solving the problem that the sample is easily contaminated during the sampling process of the existing soil and water pollutant detection device, avoiding the contamination of the sample during the sampling, thereby improving the accuracy of the detection.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and specifically to a soil and water pollutant detection device. Background Art

[0002] Soil and water environmental pollution refers to the phenomenon that pollutants generated by human activities enter the soil or water sources and accumulate to a certain extent, causing the quality of soil or water sources to deteriorate. In order to timely detect the composition of pollutants in soil and water quality and make environmental protection restoration operations, it is necessary to sample and test the soil and water quality. Commonly used detection methods include chemical analysis, spectroscopy, gas chromatography, etc. Among them, gas chromatography uses chromatographic separation technology and detection technology to perform qualitative and quantitative analysis on complex mixtures of multiple components. It can usually be used to analyze volatile organic compounds, organochlorine, organophosphorus, polycyclic aromatic hydrocarbons, phthalates, etc. in the soil.

[0003] Gas chromatograph, as equipment used for gas chromatography detection, is generally composed of a gas path system, an injection system, a chromatographic column system, a detection and temperature control system, and a recording system. The processed samples are placed in the injector in sequence. Liquid samples are generally injected with a micro syringe. Solid samples are generally dissolved in an appropriate reagent first. In the process of extracting samples from the micro syringe to placing them in the vaporization chamber, the syringe needle and the end of the injection bottle are exposed to the outside. During the movement between sampling and injection, the inside of the syringe needle is still easily contaminated. During injection, the contamination will be accompanied by the detection liquid into the vaporization chamber, thereby affecting the accuracy of the test results. Summary of the invention

[0004] In order to solve the problem that samples of existing soil and water pollutant detection devices are easily contaminated during the sampling process, the present invention provides a soil and water pollutant detection device to solve the above problem.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A soil and water pollutant detection device comprises a gas chromatograph body and a cabinet door, wherein a fixing flange is fixed to the top surface of a sample inlet on the top of the gas chromatograph body by bolts, a sample tray is arranged on the side of the gas chromatograph body, a plurality of sample placement slots are evenly arranged on the top surface of the sample tray, the bottom of the sample tray is detachably fixed to the top surface of a support frame, the support frame is fixed to the side of the gas chromatograph body by bolts, a dust cover is covered on the top of the sample tray, a fixing rod is symmetrically fixed between the bottom surface of the dust cover and the top surface of the support frame, and the bottom end of the dust cover is rotatably connected to the sample tray;

[0007] A liquid collection port is provided on one side of the dust cover plate close to the gas chromatograph body, and protective sleeves are fixed through the fixed flange and the top of the liquid collection port, and the two protective sleeves are slidably sleeved on the lower part of the sampling conduit, and an injection micro-water pump is arranged at one end of the sampling conduit close to the dust cover plate, a discharge needle is fixed through the bottom surface of the sampling conduit above the fixed flange, a liquid inlet needle is fixed through the bottom surface of the sampling conduit above the dust cover plate, a support plate is fixedly sleeved on the upper part of the sampling conduit, a servo cylinder is arranged on the top surface of the dust cover plate below the middle part of the support plate, and an output end of the servo cylinder is fixed to the bottom surface of the support plate.

[0008] Furthermore, a support sleeve is fixed at the center position of the top surface of the dust cover plate, a servo motor is arranged on the top of the support sleeve, the output end of the servo motor rotates and passes through the interior of the support sleeve and is fixed with a connecting sleeve, a sliding sleeve is fixed to the inner bottom surface of the sample tray, an insert block is slidably sleeved inside the sliding sleeve, a pull rod is fixed to the bottom surface of the insert block, a spring is arranged on the outer side of the pull rod near the insert block end, and the upper and lower ends of the spring are respectively fixed to the bottom surface of the insert block and the inner bottom surface of the sample tray.

[0009] Furthermore, the distance between the top surface of the support frame and the bottom surface of the dust cover is equal to the height of the sample tray, the liquid collection port is located directly above the sample placement slot, the sample placement slot is configured as a rectangle, the outer surface of the sample tray outside each sample placement slot is numbered, the sampling conduit is configured as an inverted U-shape that cooperates with the fixed flange and the liquid collection port, and the bottom surface of the sampling micro water pump is installed on the top surface of the support plate.

[0010] Furthermore, a guide tube is provided on the outer rotating sleeve of the pull rod at the bottom of the sample tray, and the top surface of the guide tube is fixed to the bottom of the sample tray. A fixed screw tube is provided on the outer rotating sleeve of the guide tube, and the top surface of the fixed screw tube is rotatably connected to the bottom of the sample tray through a bearing. The lower part of the fixed screw tube extends to the bottom of the dust cover plate, and one end is threadedly sleeved with a fixed clamp.

[0011] Furthermore, connecting pipes are fixed through the rear sides of the two protective sleeves, a sewage discharge micro-water pump is installed at the rear end of the connecting pipe above the fixed flange, a cleaning one-way valve is installed at the rear end of the connecting pipe above the dust cover, and drain pipes are fixed through the input ends of the cleaning one-way valve and the sewage discharge micro-water pump. A connector is fixed through the ends of the drain pipes away from the protective sleeves, and sealing plugs are fixed on the outer surfaces of the injection catheters on the top surfaces of the drainage needle and the inlet needle. Sealing rubber plugs are fixed on the liquid extraction port and the inside of the fixed flange, and the bottom surfaces of the sealing rubber sheets are flush with the bottom surfaces of the fixed flange and the bottom surfaces of the dust cover, respectively.

[0012] Furthermore, the rear sides of the two protective sleeves are each provided with a through hole that cooperates with the connecting tube, the height of the two sealing plugs is greater than the distance between the top surface of the through hole and the top surface of the sealing film, the distance between each sealing film and the inner top surface of the protective sleeve is greater than the sum of the heights of the sealing plug and the liquid inlet needle, and the heights of the drainage needle and the liquid inlet needle are both greater than the height of the sealing film.

[0013] Furthermore, the input ends of the cleaning one-way valve and the sewage micro-water pump are both connected to the connecting pipe, the output ends of the cleaning one-way valve and the sewage micro-water pump are both connected to the drain pipe, the connector on the rear side of the cleaning one-way valve is connected to the detergent storage tank through a water pipe, and the connector on the rear side of the sewage micro-water pump is connected to the wastewater tank through a water pipe.

[0014] Furthermore, the connecting sleeve and the sliding sleeve are both provided with rectangular grooves that cooperate with the insert block, wherein the height of the rectangular groove inside the sliding sleeve is greater than the height of the insert block, and the sample tray is provided with a weight-reducing groove, the bottom surface of the sliding sleeve is fixed to the bottom surface of the weight-reducing groove, the top surface of the sliding sleeve is flush with the top surface of the sample tray, the bottom surface of the connecting sleeve is flush with the bottom surface of the dust cover plate, and the pull rod is arranged as an inverted T-shape.

[0015] Furthermore, a fixed sleeve with a rectangular sleeve block is fixed to the upper part of the fixed screw tube, a fixed clamp block matching thread is provided on the outer surface of the lower part of the fixed screw tube, a limiting groove matching with the rectangular sleeve block is provided on the side of the dust cover away from the gas chromatograph body, the distance between the bottom surface of the rectangular sleeve block and the bottom surface of the sample disk is less than the thickness of the dust cover, and the width of the fixed clamp block is greater than the width of the limiting groove.

[0016] Furthermore, a method for using the soil and water pollutant detection device comprises the following steps:

[0017] Step A, assembling and loading the sample;

[0018] Step A1, align the sample boxes containing the samples one by one according to the numbers and insert them into the sample placement slot, align the initial number with the bottom of the liquid extraction port, and insert the rectangular sleeve block into the limit slot, so that the sample tray can be clamped between the bottom surface of the dust cover and the top surface of the support frame, and the fixed clamp block is twisted to clamp the dust cover tightly;

[0019] Step A2, when inserting the sample tray between the support frame and the dust cover, pull the pull rod downward so that the pull rod drives the compression spring of the insert block to move downward until the spring is completely moved into the sliding sleeve. When the sample tray is fixed between the support frame and the dust cover, release the pull rod so that the insert block is inserted into the connecting sleeve under the push of the spring;

[0020] Step B, sampling and washing one by one;

[0021] Step B1, after the sample tray is assembled, the servo cylinder is turned on, so that the servo cylinder is operated to drive the support plate to move downward, which can drive the sample introduction tube to move downward, thereby driving the discharge needle and the liquid inlet needle at the bottom of the sample introduction tube to be inserted into the vaporization chamber and the sample box respectively, and then the sample introduction micro water pump is turned on to draw the sample inside the sample box into the vaporization chamber to complete the sample introduction;

[0022] Step B2, when the bottom of the sample injection tube moves downward, the sealing rubber plug is driven to move downward inside the protective sleeve, and the liquid discharge needle and the liquid inlet needle pierce the sealing rubber sheet and enter the vaporization chamber and the sample box when they move downward, and the main body of the gas chromatograph is opened for detection;

[0023] Step B3, after one injection is completed, the servo cylinder operates to push the injection tube upward, driving the discharge needle and the inlet needle to move out of the vaporization chamber and the sample box, and move to the top of the sealing film, the servo motor operates to drive the connecting sleeve to rotate, when the connecting sleeve rotates, it drives the plug block to rotate, when the plug block rotates, it drives the sample plate to rotate through the sliding sleeve, and the next sample placement slot is rotated to align with the liquid collection port, and the sample box can be moved down to below the liquid collection port to prepare for the next injection;

[0024] Step C, cleaning the inside of the injection catheter, the discharge needle and the inlet needle;

[0025] Step C1, after the liquid discharge needle and the liquid inlet needle are pulled out of the sealing film, the sealing film closes due to its own elasticity while the sample plate rotates, and at this time, the bottom surface of the sealing plug and the top surface of the sealing film form a closed space;

[0026] Step C2, at this time, the sampling micro-water pump and the cleaning one-way valve are turned on, the sampling micro-water pump is running, and the detergent in the detergent storage box is extracted through the connecting pipe, the cleaning one-way valve, the drain pipe and the connecting head. After the detergent enters between the sealing rubber plug and the sealing film, the liquid inlet needle is cleaned. At the same time, the sampling micro-water pump is running, and the cleaning liquid is drawn from the liquid inlet needle into the inside of the sampling conduit. At the same time, the cleaning one-way valve is closed, and the cleaning liquid enters the inside of the sampling conduit through the discharge needle, and is discharged into the protective cover above the fixed flange through the discharge needle after passing through the sampling micro-water pump, so that the discharge needle can be cleaned;

[0027] Step C3, after the cleaning of the drainage needle is completed, the drainage micro pump is operated to draw in the waste liquid generated by the cleaning of the injection catheter and the outer side of the drainage needle, and the waste liquid is discharged into the waste water tank with a purification structure through the connecting pipe, the drainage pipe and the connecting head. After the cleaning is completed, repeat step B to continue the injection;

[0028] Step C4, after all the sample injection tests are completed, the fixed clamp block is twisted to release the clamping of the dust cover by the fixed clamp block, and the pull rod is pulled to pull the plug block out of the connecting sleeve, so that the sample tray can be pulled out from between the support frame and the dust cover, and placed in the sample box for testing;

[0029] Step C5, when manual injection is required, the bolts on the support frame and the fixed flange are screwed to release the fixed flange and the support frame, and the support frame and the fixed flange are removed from the gas chromatograph body to perform manual injection.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the present invention, through the sealed sampling design, when testing soil and water quality, after the processed sample box is placed in the sample tray and sealed, the sampling is completed without opening the sample tray and exposing the liquid inlet needle and the liquid discharge needle, thereby avoiding exposure of the sample during transfer during sampling, solving the problem that the sample is easily contaminated during the sampling process of the existing soil and water pollutant detection device, avoiding the sample from being contaminated during sampling, and thus improving the accuracy of the detection.

[0032] 2. In the present invention, the detachable design of the sample tray facilitates the uniform placement of sample boxes during detection, and the digital identification on the outside of the sample tray facilitates the recording of sample information with corresponding numbers during sampling detection, thereby ensuring the accuracy and convenience of subsequent data recording of the detection device.

[0033] 3. In the present invention, by using the cleaning component, after each sampling is completed, the inside and outside of the liquid inlet needle and the liquid discharge needle, as well as the inside of the micro water pump and the injection catheter can be cleaned to avoid cross contamination between samples, thereby further improving the accuracy of pollutant detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 is a schematic diagram of the overall structure of a pollutant detection device according to an embodiment of the present application;

[0036] Figure 2 yes Figure 1 A schematic diagram of the back structure of the automatic feeding assembly in the embodiment shown;

[0037] Figure 3 yes Figure 1 A bottom view schematic diagram of the automatic feeding assembly structure in the illustrated embodiment;

[0038] Figure 4 yes Figure 1 A schematic cross-sectional view of the injection end structure in the illustrated embodiment;

[0039] Figure 5 yes Figure 1 A schematic cross-sectional view of the sampling end structure in the illustrated embodiment;

[0040] Figure 6 yes Figure 1 A schematic front view of the sample tray connection structure in the illustrated embodiment;

[0041] Figure 7 yes Figure 1 A bottom view of the sample tray connection structure in the illustrated embodiment.

[0042] The meanings of the reference numerals in the figure are as follows: 1. Gas chromatograph body; 2. Fixed flange; 3. Sample tray; 4. Sample placement slot; 5. Sample injection micro pump; 6. Support frame; 7. Dust cover; 8. Sample injection catheter; 9. Drain needle; 10. Liquid inlet needle; 11. Protective cover; 12. Sealing rubber plug; 13. Sealing film; 14. Connecting pipe; 15. Cleaning one-way valve; 16. Sewage discharge micro pump; 17. Drain pipe; 18. Connecting head; 19. Support plate; 20. Servo cylinder; 21. Fixed rod; 22. Servo motor; 23. Connecting sleeve; 24. Support sleeve; 25. Sliding sleeve; 26. Insert block; 27. Pull rod; 28. Spring; 29. ​​Limiting groove; 30. Liquid extraction port; 31. Guide tube; 32. Rectangular sleeve block; 33. Fixed clamp block; 34. Fixed screw tube; 35. Cabinet door. DETAILED DESCRIPTION

[0043] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Reference Figures 1 to 7, a soil and water pollutant detection device, comprising a gas chromatograph body 1 and a cabinet door 35, a fixing flange 2 is fixed to the top surface of the top sample inlet of the gas chromatograph body 1 by bolts, a sample tray 3 is arranged on the side of the gas chromatograph body 1, a plurality of sample placement slots 4 are evenly spaced on the top surface of the sample tray 3, and the outer surface of the sample tray 3 outside each sample placement slot 4 is provided with a number for convenient data recording, the bottom of the sample tray 3 can be detachably fixed to the top surface of the support frame 6, the support frame 6 is fixed to the side of the gas chromatograph body 1 by bolts, the top of the sample tray 3 is covered with a dust cover 7, the distance between the top surface of the support frame 6 and the bottom surface of the dust cover 7 is equal to the height of the sample tray 3, a fixing rod 21 is symmetrically fixed between the bottom surface of the dust cover 7 and the top surface of the support frame 6, and the bottom end of the dust cover 7 is rotatably connected to the sample tray 3;

[0045] A liquid taking port 30 is provided on one side of the dust cover 7 close to the main body 1 of the gas chromatograph. The liquid taking port 30 is located directly above the sample placement slot 4. The sample placement slot 4 is set to be rectangular to prevent the sample box from rotating when the discharge needle 9 and the inlet needle 10 are inserted into the sample box. A protective sleeve 11 is fixed through the top of the fixed flange 2 and the liquid taking port 30. Both protective sleeves 11 are slidably sleeved on the lower part of the sample injection conduit 8. The sample injection conduit 8 is set to be an inverted U-shape that cooperates with the fixed flange 2 and the liquid taking port 30. An injection micro-water pump 5 is arranged at one end of the tube 8 close to the dust cover 7, and the bottom surface of the injection micro-water pump 5 is installed on the top surface of the support plate 19. A discharge needle 9 is fixed through the bottom surface of the injection conduit 8 above the fixed flange 2, and a liquid inlet needle 10 is fixed through the bottom surface of the injection conduit 8 above the dust cover 7. A support plate 19 is fixedly sleeved on the upper part of the injection conduit 8, and a servo cylinder 20 is arranged on the top surface of the dust cover 7 below the middle part of the support plate 19, and the output end of the servo cylinder 20 is fixed to the bottom surface of the support plate 19.

[0046] After each injection is completed, the injection catheter 8, the drainage needle 9 and the inlet needle 10 need to be cleaned to avoid contamination of the next sample. For this purpose, a connecting pipe 14 is fixed through the rear side of the two protective sleeves 11, a sewage discharge micro pump 16 is installed at the rear end of the connecting pipe 14 above the fixed flange 2, and a cleaning one-way valve 15 is installed at the rear end of the connecting pipe 14 above the dust cover 7. A drain pipe 17 is fixed through the input end of the cleaning one-way valve 15 and the sewage discharge micro pump 16, and the drain pipe 17 is away from the protective sleeve. One end of each protective sleeve 11 is fixed with a connector 18, the outer surface of the sample inlet conduit 8 on the top of the discharge needle 9 and the inlet needle 10 is fixed with a sealing rubber plug 12, the liquid taking port 30 and the fixed flange 2 are fixed with a sealing rubber sheet 13, the bottom surface of the sealing rubber sheet 13 is flush with the bottom surface of the fixed flange 2 and the bottom surface of the dust cover 7 respectively, and the rear sides of the two protective sleeves 11 are provided with a through hole that matches the connecting pipe 14, and the height of the two sealing rubber plugs 12 is greater than the distance between the top surface of the through hole and the top surface of the sealing rubber sheet 13. The distance between each sealing film 13 and the inner top surface of the protective sleeve 11 is greater than the sum of the heights of the sealing plug 12 and the liquid inlet needle 10. The heights of the drainage needle 9 and the liquid inlet needle 10 are greater than the heights of the sealing film 13, ensuring that the drainage needle 9 and the liquid inlet needle 10 can pass through the sealing film 13. The input ends of the cleaning one-way valve 15 and the sewage discharge micro-water pump 16 are both connected to the connecting pipe 14, and the output ends of the cleaning one-way valve 15 and the sewage discharge micro-water pump 16 are both connected to the drain pipe 17. The connector 18 on the rear side of the cleaning one-way valve 15 is connected to the detergent storage box through a water pipe, and the connector 18 on the rear side of the sewage discharge micro-water pump 16 is connected to the waste water tank through a water pipe, which is convenient for discharging waste liquid after cleaning. When not detecting, the drainage needle 9 and the liquid inlet needle 10 are retracted into the protective cover 11 on the top surface of the sealing film 13, which can also avoid contamination of the drainage needle 9 and the liquid inlet needle 10. When the sealing film 13 loses its elasticity and cannot be sealed, it needs to be cut and the new sealing film 13 is hot-melted and fixed for replacement.

[0047] During sampling, after each sample box is sampled, it is necessary to rotate the lower sample box to the bottom of the liquid collection port 30. In order to drive the sample tray 3 to rotate and facilitate the disassembly of the sample tray 3, a support sleeve 24 is fixed at the center of the top surface of the dust cover 7. A servo motor 22 is arranged on the top of the support sleeve 24. The output end of the servo motor 22 rotates and penetrates into the inside of the support sleeve 24 and is fixed with a connecting sleeve 23. A sliding sleeve 25 is fixed to the bottom surface of the interior of the sample tray 3. An insert block 26 is slidably sleeved inside the sliding sleeve 25. A pull rod 27 is fixed to the bottom surface of the insert block 26. A spring 28 is sleeved on the outer side of the pull rod 27 near the end of the insert block 26. The upper and lower ends of the spring 28 are respectively fixed at The bottom surface of the insert block 26 and the bottom surface of the sample tray 3, the connecting sleeve 23 and the sliding sleeve 25 are all provided with rectangular grooves that cooperate with the insert block 26, wherein the height of the rectangular groove inside the sliding sleeve 25 is greater than the height of the insert block 26, and a weight-reducing groove is provided inside the sample tray 3. The bottom surface of the sliding sleeve 25 is fixed to the bottom surface of the weight-reducing groove, the top surface of the sliding sleeve 25 is flush with the top surface of the sample tray 3, the bottom surface of the connecting sleeve 23 is flush with the bottom surface of the dust cover 7, the pull rod 27 is set to an inverted T shape, which is convenient for pulling the pull rod 27, and the bottom surface of the guide tube 31 is located below the bottom surface of the fixed screw 34 to avoid friction between the fixed screw 34 and the pull rod 27 when the guide tube 31 rotates.

[0048] In order to facilitate the placement of the sample box into the sample placement slot 4, a guide tube 31 is rotatably sleeved on the outer side of the pull rod 27 on the bottom surface of the sample tray 3, and the top surface of the guide tube 31 is fixed to the bottom surface of the sample tray 3. A fixed screw tube 34 is rotatably sleeved on the outer side of the guide tube 31. The top surface of the fixed screw tube 34 is rotatably connected to the bottom surface of the sample tray 3 through a bearing. The lower part of the fixed screw tube 34 extends to one end of the bottom surface of the dust cover plate 7 and is threadedly sleeved with a fixed clamp block 33. The upper part of the fixed screw tube 34 is fixed with a fixed sleeve with a rectangular sleeve block 32. The fixed screw tube 34 A fixing clamp 33 with a matching thread is provided on the lower outer surface, and the fixing screw 34 is set to a hollow T-shape. The top of the fixing screw 34 is embedded and rotatably connected to the bottom surface of the sample tray 3. The bottom surface of the top of the fixing screw 34 abuts against the top surface of the dust cover 7. A limiting groove 29 matching with the rectangular sleeve block 32 is provided on the side of the dust cover 7 away from the gas chromatograph body 1. The distance between the bottom surface of the rectangular sleeve block 32 and the bottom surface of the sample tray 3 is less than the thickness of the dust cover 7, and the width of the fixing clamp 33 is greater than the width of the limiting groove 29.

[0049] Instructions for use: Assemble and load the samples, align the sample boxes containing the samples one by one according to the numbers and insert them into the sample placement slot 4, align the initial number with the bottom of the liquid extraction port 30, and insert the rectangular sleeve block 32 into the limiting slot 29, so that the sample tray 3 can be clamped between the bottom surface of the dust cover 7 and the top surface of the support frame 6, and the fixed clamp block 33 is twisted so that the fixed clamp block 33 clamps and fixes the dust cover 7. When the sample tray 3 is inserted between the support frame 6 and the dust cover 7, the pull rod 27 is pulled downward so that the pull rod 27 drives the insert block 26 to compress the spring 28 and move downward until the spring 28 is completely moved into the sliding sleeve 25. When the sample tray 3 is fixed between the support frame 6 and the dust cover 7, the pull rod 27 is released so that the insert block 26 is inserted into the connecting sleeve 23 under the push of the spring 28.

[0050] Take samples one by one, and clean them. After the sample tray 3 is assembled, open the servo cylinder 20 so that the servo cylinder 20 can drive the support plate 19 to move downward, which can drive the sampling conduit 8 to move downward, thereby driving the drainage needle 9 and the inlet needle 10 at the bottom of the sampling conduit 8 to insert into the vaporization chamber and the sample box respectively, and then open the sampling micro water pump 5 to draw the sample inside the sample box into the vaporization chamber to complete the sampling. When the bottom of the sampling conduit 8 moves downward, it drives the sealing rubber plug 12 to move downward inside the protective sleeve 11, and the drainage needle 9 and the inlet needle 10 pierce the sealing rubber sheet 13 and enter when they move downward. The gasification chamber and the sample box are opened, and the gas chromatograph body 1 is tested. After one injection is completed, the servo cylinder 20 is operated to push the injection guide tube 8 upward, driving the discharge needle 9 and the inlet needle 10 to move out of the gasification chamber and the sample box, and move into the top of the sealing film 13. The servo motor 22 is operated to drive the connecting sleeve 23 to rotate. When the connecting sleeve 23 rotates, the plug block 26 is driven to rotate. When the plug block 26 rotates, the sample tray 3 is driven to rotate through the sliding sleeve 25, and the next sample placement slot 4 is rotated to be aligned with the liquid taking port 30, and the sample box can be moved down to below the liquid taking port 30 to prepare for the next injection;

[0051] The inside of the sampling conduit 8, the drainage needle 9 and the inlet needle 10 are cleaned. After the drainage needle 9 and the inlet needle 10 are pulled out of the sealing film 13, the sealing film 13 is closed under its own elastic characteristics while the sample disk 3 rotates. At this time, the bottom surface of the sealing plug 12 and the top surface of the sealing film 13 form a closed space. At this time, the sampling micro-water pump 5 and the cleaning one-way valve 15 are opened, and the sampling micro-water pump 5 is operated to extract the detergent in the detergent storage box through the connecting pipe 14, the cleaning one-way valve 15, the drain pipe 17 and the connecting head 18. After the detergent enters between the sealing plug 12 and the sealing film 13, the inlet needle 10 is cleaned. At the same time, the sampling micro-water pump 5 is operated to draw the cleaning liquid from the inlet needle 10 into the sampling conduit 8. At the same time, the cleaning one-way valve 15 is closed, and the cleaning liquid enters the sampling conduit 8 through the drainage needle 9, and is discharged into the fixed flange 2 through the drainage needle 9 after passing through the sampling micro-water pump 5. The drainage needle 9 can be cleaned by inserting the drainage needle 9 into the protective sleeve 11. After the drainage needle 9 is cleaned, the drainage micro pump 16 is operated to draw in the waste liquid generated by the cleaning of the injection catheter 8 and the outer side of the drainage needle 9, and the waste liquid is discharged into the waste water tank with a purification structure through the connecting pipe 14, the drain pipe 17 and the connecting head 18. After the cleaning is completed, repeat step B to continue sampling. After all the sampling tests are completed, the fixed clamp block 33 is twisted to release the clamping fixation of the dust cover plate 7 by the fixed clamp block 33, and the pull rod 27 is pulled to pull the plug block 26 out of the connecting sleeve 23. The sample tray 3 can be pulled out from between the support frame 6 and the dust cover plate 7, and placed in the sample box for testing. When manual sampling is required, the bolts on the support frame 6 and the fixed flange 2 are twisted to release the fixation of the fixed flange 2 and the support frame 6, and the support frame 6 and the fixed flange 2 are removed from the gas chromatograph body 1, and manual sampling can be performed.

[0052] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A soil and water pollutant detection device, characterized in that: The invention comprises a gas chromatograph body (1) and a cabinet door (35), wherein a fixing flange (2) is fixed to the top surface of a sample inlet of the gas chromatograph body (1) by bolts, a sample tray (3) is arranged on the side of the gas chromatograph body (1), a plurality of sample placement slots (4) are arranged on the top surface of the sample tray (3) at equal intervals, the bottom of the sample tray (3) is detachably fixed to the top surface of a support frame (6), the support frame (6) is fixed to the side of the gas chromatograph body (1) by bolts, the top of the sample tray (3) is covered with a dust cover (7), a fixing rod (21) is symmetrically fixed between the bottom surface of the dust cover (7) and the top surface of the support frame (6), and the bottom end of the dust cover (7) is rotatably connected to the sample tray (3); A liquid extraction port (30) is provided on a side of the dust cover (7) close to the gas chromatograph body (1), and a protective sleeve (11) is fixedly passed through the top of the fixed flange (2) and the liquid extraction port (30), and the two protective sleeves (11) are slidably sleeved on the lower part of the sample introduction conduit (8), and a sample introduction micro pump (5) is provided at one end of the sample introduction conduit (8) close to the dust cover (7), and a liquid discharge needle (9) is fixedly passed through the bottom surface of the sample introduction conduit (8) above the fixed flange (2), and a liquid inlet needle (10) is fixedly passed through the bottom surface of the sample introduction conduit (8) above the dust cover (7), and a support plate (19) is fixedly sleeved on the upper part of the sample introduction conduit (8), and a servo cylinder (20) is provided on the top surface of the dust cover (7) below the middle part of the support plate (19), and the output end of the servo cylinder (20) is fixed to the bottom surface of the support plate (19); A connecting pipe (14) is fixedly connected to the rear side of the two protective sleeves (11); a sewage discharge micro pump (16) is installed at the rear end of the connecting pipe (14) above the fixed flange (2); a cleaning one-way valve (15) is installed at the rear end of the connecting pipe (14) above the dust cover (7); a drain pipe (17) is fixedly connected to the input end of the cleaning one-way valve (15) and the sewage discharge micro pump (16); a connector (18) is fixedly connected to the end of the drain pipe (17) away from the protective sleeve (11); a sealing rubber plug (12) is fixedly provided on the outer surface of the injection conduit (8) on the top surface of the liquid discharge needle (9) and the liquid inlet needle (10); a sealing rubber sheet (13) is fixedly provided inside the liquid taking port (30) and the fixed flange (2); the bottom surface of the sealing rubber sheet (13) is flush with the bottom surface of the fixed flange (2) and the bottom surface of the dust cover (7); The rear sides of the two protective sleeves (11) are each provided with a through hole that cooperates with the connecting tube (14); the height of the two sealing rubber plugs (12) is greater than the distance between the top surface of the through hole and the top surface of the sealing rubber sheet (13); the distance between each of the sealing rubber sheets (13) and the inner top surface of the protective sleeve (11) is greater than the sum of the heights of the sealing rubber plug (12) and the liquid inlet needle (10); and the heights of the liquid discharge needle (9) and the liquid inlet needle (10) are both greater than the height of the sealing rubber sheet (13); The input ends of the cleaning one-way valve (15) and the sewage discharge micro-water pump (16) are both connected to the connecting pipe (14), and the output ends of the cleaning one-way valve (15) and the sewage discharge micro-water pump (16) are both connected to the drainage pipe (17). The connector (18) on the rear side of the cleaning one-way valve (15) is connected to the cleaning agent storage tank through a water pipe, and the connector (18) on the rear side of the sewage discharge micro-water pump (16) is connected to the waste water tank through a water pipe.

2. The soil and water pollutant detection device according to claim 1, characterized in that: A support sleeve (24) is fixed at the center position of the top surface of the dust cover (7), a servo motor (22) is arranged on the top of the support sleeve (24), the output end of the servo motor (22) rotates and passes through the inside of the support sleeve (24) and is fixed with a connecting sleeve (23), a sliding sleeve (25) is fixed to the inner bottom surface of the sample tray (3), an insert block (26) is slidably sleeved inside the sliding sleeve (25), a pull rod (27) is fixed to the bottom surface of the insert block (26), a spring (28) is sleeved on the outer side of the pull rod (27) close to the insert block (26), and the upper and lower ends of the spring (28) are respectively fixed to the bottom surface of the insert block (26) and the inner bottom surface of the sample tray (3).

3. The soil and water pollutant detection device according to claim 2, characterized in that: The distance between the top surface of the support frame (6) and the bottom surface of the dust cover (7) is equal to the height of the sample tray (3); the liquid taking port (30) is located directly above the sample placement slot (4); the sample placement slot (4) is arranged in a rectangular shape; the outer surface of the sample tray (3) outside each sample placement slot (4) is provided with a number; the sample injection conduit (8) is arranged in an inverted U-shape that cooperates with the fixed flange (2) and the liquid taking port (30); and the bottom surface of the sample injection micro water pump (5) is mounted on the top surface of the support plate (19).

4. The soil and water pollutant detection device according to claim 3, characterized in that: A guide tube (31) is rotatably sleeved on the outer side of the pull rod (27) on the bottom surface of the sample tray (3). The top surface of the guide tube (31) is fixed to the bottom surface of the sample tray (3). A fixed screw tube (34) is rotatably sleeved on the outer side of the guide tube (31). The top surface of the fixed screw tube (34) is rotatably connected to the bottom surface of the sample tray (3) via a bearing. The lower part of the fixed screw tube (34) extends to the bottom surface of the dust cover (7) and is threadedly sleeved on one end with a fixed clamp (33).

5. The soil and water pollutant detection device according to claim 4, characterized in that: The connecting sleeve (23) and the sliding sleeve (25) are both provided with rectangular grooves cooperating with the insert block (26), wherein the height of the rectangular groove inside the sliding sleeve (25) is greater than the height of the insert block (26), the sample plate (3) is provided with a weight-reducing groove, the bottom surface of the sliding sleeve (25) is fixed to the bottom surface of the weight-reducing groove, the top surface of the sliding sleeve (25) is flush with the top surface of the sample plate (3), the bottom surface of the connecting sleeve (23) is flush with the bottom surface of the dust cover (7), and the pull rod (27) is arranged in an inverted T shape.

6. The soil and water pollutant detection device according to claim 5, characterized in that: A fixed sleeve having a rectangular sleeve block (32) is fixed to the upper part of the fixed screw tube (34); a fixed clamp block (33) having a mating thread is provided on the outer surface of the lower part of the fixed screw tube (34); a limiting groove (29) mating with the rectangular sleeve block (32) is provided on a side of the dust cover (7) away from the gas chromatograph body (1); the distance between the bottom surface of the rectangular sleeve block (32) and the bottom surface of the sample tray (3) is less than the thickness of the dust cover (7); and the width of the fixed clamp block (33) is greater than the width of the limiting groove (29).

7. A method for using the soil and water pollutant detection device according to claim 6, characterized in that: The method of use comprises the following steps: Step A, assembling and loading the sample; Step A1, align the sample boxes containing the samples one by one according to the numbers and insert them into the sample placement slot (4), align the initial number with the bottom of the liquid extraction port (30), and insert the rectangular sleeve block (32) into the limiting slot (29), so that the sample tray (3) can be clamped between the bottom surface of the dust cover (7) and the top surface of the support frame (6), and the fixed clamp block (33) is twisted so that the fixed clamp block (33) clamps and fixes the dust cover (7); Step A2, when the sample tray (3) is inserted between the support frame (6) and the dust cover (7), the pull rod (27) is pulled downward, so that the pull rod (27) drives the insert block (26) to compress the spring (28) and move downward until the spring (28) is completely moved into the sliding sleeve (25). When the sample tray (3) is fixed between the support frame (6) and the dust cover (7), the pull rod (27) is released, so that the insert block (26) is inserted into the connecting sleeve (23) under the push of the spring (28); Step B, sampling and washing one by one; Step B1, after the sample tray (3) is assembled, the servo cylinder (20) is turned on, so that the servo cylinder (20) is operated to drive the support plate (19) to move downward, thereby driving the sample injection conduit (8) to move downward, thereby driving the liquid discharge needle (9) and the liquid injection needle (10) at the bottom of the sample injection conduit (8) to be inserted into the vaporization chamber and the sample box respectively, and then the sample injection micro water pump (5) is turned on, so that the sample inside the sample box can be pumped into the vaporization chamber, thereby completing the injection; Step B2, when the bottom of the sample injection tube (8) moves downward, the sealing rubber plug (12) is driven to move downward inside the protective sleeve (11), and the liquid discharge needle (9) and the liquid inlet needle (10) pierce the sealing rubber sheet (13) when moving downward and enter the vaporization chamber and the sample box, and the gas chromatograph body (1) is opened for detection; Step B3, after one injection is completed, the servo cylinder (20) operates to push the injection tube (8) upward, driving the discharge needle (9) and the inlet needle (10) to move out of the vaporization chamber and the sample box, and move into the top of the sealing film (13), and the servo motor (22) operates to drive the connecting sleeve (23) to rotate, and when the connecting sleeve (23) rotates, it drives the plug block (26) to rotate, and when the plug block (26) rotates, it drives the sample plate (3) to rotate through the sliding sleeve (25), and the next sample placement slot (4) is rotated to be aligned with the liquid collection port (30), and the sample box can be moved down to below the liquid collection port (30) to prepare for the next injection; Step C, cleaning the inside of the sample injection catheter (8), the liquid discharge needle (9) and the liquid inlet needle (10); Step C1, after the liquid discharge needle (9) and the liquid inlet needle (10) are pulled out of the sealing film (13), the sample plate (3) rotates and the sealing film (13) closes due to its own elastic properties, and at this time, the bottom surface of the sealing rubber plug (12) and the top surface of the sealing film (13) form a closed space; Step C2, at this time, the sampling micro-water pump (5) and the cleaning one-way valve (15) are opened, the sampling micro-water pump (5) is operated, and the detergent in the detergent storage box is extracted through the connecting pipe (14), the cleaning one-way valve (15), the drain pipe (17) and the connecting head (18). After the detergent enters between the sealing rubber plug (12) and the sealing rubber sheet (13), the liquid inlet needle (10) is cleaned. At the same time, the sampling micro-water pump (5) is operated to draw the cleaning liquid from the liquid inlet needle (10) into the inside of the sampling conduit (8). At the same time, the cleaning one-way valve (15) is closed, and the cleaning liquid enters the inside of the sampling conduit (8) through the discharge needle (9), and is discharged into the inside of the protective sleeve (11) above the fixed flange (2) through the sampling micro-water pump (5), thereby cleaning the discharge needle (9); Step C3, after the cleaning of the drainage needle (9) is completed, the drainage micro pump (16) is operated to draw in the waste liquid generated by the cleaning of the injection tube (8) and the outer side of the drainage needle (9), and discharge the waste liquid into the waste water tank with a purification structure through the connecting tube (14), the drainage pipe (17) and the connecting head (18). After the cleaning is completed, step B is repeated to continue the injection; Step C4, after all the sample injection tests are completed, the fixed clamp block (33) is twisted to release the clamping fixation of the fixed clamp block (33) on the dust cover (7), and the pull rod (27) is pulled to pull the plug block (26) out of the connecting sleeve (23), so that the sample tray (3) can be pulled out from between the support frame (6) and the dust cover (7) and placed in the sample box for testing; Step C4, when manual injection is required, the bolts on the support frame (6) and the fixed flange (2) are screwed to release the fixation of the fixed flange (2) and the support frame (6), and the support frame (6) and the fixed flange (2) are removed from the gas chromatograph body (1), and manual injection can be performed.

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