A soil petroleum hydrocarbon content measuring instrument and determination method

Abstract

The present invention relates to a soil petroleum hydrocarbon content measuring instrument and a measuring method, comprising: a bottom plate, a mounting box arranged on the bottom plate, a base frame arranged on one side of the bottom plate surface, a limit frame arranged on the bottom plate surface and located between the mounting box and the base frame, a gas chromatograph for detecting the soil petroleum hydrocarbon content is arranged at the bottom of the inner cavity of the mounting box; a sampling mechanism arranged inside the limit frame in a manner that can be raised and lowered; a driving mechanism arranged inside the base frame and driving the sampling mechanism to rise and fall, a sampling processing mechanism arranged inside the mounting box, a feeding mechanism arranged inside the mounting box and located below the sampling processing mechanism, and a detection mechanism located inside the mounting box. The soil petroleum hydrocarbon content measuring instrument and the measuring method, through the arrangement of the gas chromatograph and the bottom plate, enables the gas chromatograph to perform real-time detection on the collected soil, without the need to transport the soil, thereby reducing the soil detection cost.

Description

Technical Field

[0001] The invention relates to the technical field of soil petroleum hydrocarbon detection, and in particular to a soil petroleum hydrocarbon content measuring instrument and a measuring method. Background Art

[0002] Soil is the loose surface layer on the earth's surface that has a certain fertility and can grow plants. It is composed of minerals, organic matter, water and air. It is the weathering of rocks formed and developed under the combined action of biological, climatic, topographical and other factors. It can supply and regulate the water, nutrients, air and heat required for plant growth. Human agricultural production activities have an impact on the soil on cultivated land.

[0003] Petroleum refers to a mixture of gaseous, liquid and solid hydrocarbons. It is a viscous, dark brown liquid with natural occurrence. It is called the "blood of industry". During the process of petroleum extraction, processing and utilization, more and more petroleum may enter the soil environment and the ocean, causing pollution and damage to the soil environment and marine water quality.

[0004] Therefore, in the process of processing and extracting oil, the surrounding soil needs to be tested regularly to prevent excessive petroleum hydrocarbon pollution. When testing existing soil, the sampled soil needs to be sent to the testing agency for testing, which means that the sampled soil needs to be transported for a certain period of time. During the long transportation, the soil will be different from when it was just collected, which makes it easy for subsequent tests to have differences, reducing the accuracy of the test. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a soil petroleum hydrocarbon content measuring instrument and a measuring method, which has the advantages of real-time sampling and detection and improved detection accuracy.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A soil petroleum hydrocarbon content measuring instrument, comprising:

[0008] A bottom plate, a mounting box disposed on the bottom plate, a base frame disposed on one side of the bottom plate surface, a limit frame disposed on the bottom plate surface and located between the mounting box and the base frame, and a gas chromatograph for detecting the petroleum hydrocarbon content in the soil is disposed at the bottom of the inner cavity of the mounting box;

[0009] A sampling mechanism that is liftably disposed inside the limiting frame;

[0010] The sampling mechanism comprises: a transmission frame slidably arranged inside the limiting frame, a rotating shaft rotatably penetrating inside the transmission frame, a sampling tube arranged at the bottom end of the rotating shaft, a driving motor with an output shaft extending inside the transmission frame, a driving wheel rotatably arranged inside the transmission frame and fixedly connected to the output shaft of the driving motor, and a driven wheel sleeved on the outer surface of the rotating shaft and connected to the driving wheel through a belt;

[0011] A driving mechanism disposed inside the base frame and driving the sampling mechanism to rise and fall, a sampling and processing mechanism disposed inside the installation box, a loading mechanism disposed inside the installation box and located below the sampling and processing mechanism, and a detection mechanism disposed inside the installation box;

[0012] The driving mechanism includes: a servo motor arranged at the top of the inner cavity of the base frame, a threaded screw arranged on the output shaft of the servo motor and rotatably connected to the base plate, a screw sleeve threadedly connected to the outer surface of the threaded screw, and a fixed block arranged on one side of the screw sleeve and fixedly connected to the transmission frame.

[0013] To implement the above technical solution, the collected soil can be tested in real time by using the gas chromatograph installed on the bottom plate. There is no need to transport the soil, which reduces the cost of soil testing and prevents the collected soil from changing during transportation, thereby improving the accuracy of the test results. The sampling mechanism can be used to drive the driving motor to rotate when the driving wheel is working. When the driving wheel rotates, it will drive the driven wheel to rotate through the belt. When the driven wheel rotates, it will drive the connecting rod to rotate through the rotating shaft. When the connecting rod rotates, it will drive the sampling tube to rotate. When the sampling tube descends during the rotation, it can drill into the soil. After drilling into the soil, the soil will remain inside the sampling tube. When the sampling tube stops rotating and rises, the soil deep in the ground can be brought out to complete the sampling process. In order to facilitate drilling into the soil, the bottom of the sampling tube is provided with annular serrations at the bottom to make it more efficient. Since the sampling mechanism can freely adjust the height according to the driving mechanism, it can perform sampling at different depths of the ground. The soil can be sampled and collected, which improves practicality and further improves the accuracy of soil detection. When the servo motor is working, it will drive the threaded screw to rotate. When the threaded screw rotates, it will drive the transmission frame to rise and fall through the threaded screw and the fixed block, thereby realizing the lifting and falling control of the collection mechanism. No manual operation is required, which reduces the labor of the collection personnel, and the process does not require excessive manual intervention, so that the soil will not be polluted secondary. In addition, the collected soil will not affect the sampling personnel, which improves safety. In addition, through the setting of the sampling and processing mechanism, the sampled soil can be preliminarily processed to separate the large particles from the small particles in the soil, which is convenient for the detection of the gas chromatograph. The processed soil can be extracted by the feeding mechanism, and then the extracted soil is sent to the gas chromatograph for detection by the gas chromatograph, so that the soil does not need any manual intervention during the detection process, which improves the cost rate of soil detection and further improves the efficiency of soil detection.

[0014] As a preferred solution of the present invention, a closed window is rotatably provided on one side of the installation box, a push rod is fixedly connected to one side of the base frame, and a plurality of universal wheels are provided around the bottom of the base plate.

[0015] To implement the above technical solution, the universal wheels allow the base plate to have a certain degree of mobility, so that the device can be moved to the vicinity of the soil that needs to be tested, and then the soil can be sampled and tested. The push rod can facilitate the operator to push the device to move, and the closed window can close the installation box, conversely, the installation box can be opened to facilitate cleaning and replacement of internal parts.

[0016] As a preferred solution of the present invention, the inner cavity of the limiting frame and both sides of the transmission frame are vertically fixedly connected with sliding rods, and the surface of the transmission frame is fixedly connected with sliding sleeves slidably connected to the sliding rods.

[0017] To implement the above technical solution, the slide rod can make the slide sleeve slide on its surface, thereby limiting the lifting of the transmission frame and preventing the transmission frame from rotating synchronously with the threaded screw.

[0018] As a preferred solution of the present invention, the sampling and processing mechanism includes: a cylinder laterally arranged on the inner wall of the installation box, a control motor arranged at the output end of the cylinder, a connecting plate arranged on the output shaft of the control motor, a sliding frame slidably connected to the connecting plate up and down, an upper sieve plate arranged on the other side of the sliding frame, a resonance plate arranged on the surface of the upper sieve plate, a lower sieve plate arranged on one side of the sliding frame and located below the upper sieve plate, and a vibration motor arranged on the other side of the upper and lower sieve plates.

[0019] To implement the above technical solution, the upper sieve plate can be moved to the bottom of the sampling tube after the soil is collected by the operation of the cylinder, and the resonance plate can be fitted with the side wall of the sampling tube. When the vibration motor is working, the upper sieve plate will be driven to vibrate. When the upper sieve plate vibrates, it will hit the outer wall of the sampling tube through the resonance plate, causing the sampling tube to vibrate to a certain extent, so that the soil inside the sampling tube can fall to the surface of the upper sieve plate, and then the upper sieve plate is used to screen the soil, so that large particles of soil remain on the upper sieve plate, medium-sized particles of soil fall to the lower sieve plate, and small particles will be sieved through the lower sieve plate, and then the upper sieve plate is driven to move to the top of the guide heating plate by the operation of the cylinder, and then the vibration motor is used to Vibrate again to make the soil remaining on the surface of the lower sieve plate fall through the sieve holes to the surface of the guide heating plate, and then use the guide heating plate to dry and guide the soil, so that the soil falls into the feeding mechanism below, wherein the guide heating plate can be replaced with other devices that can remove moisture from the soil and guide it according to actual needs, such as microwave heating and transportation, etc., and an existing sealing plug with automatic opening and closing function can be set under the lower sieve plate to facilitate the collection of small soils and prevent small soils from being unable to be collected. A reset spring can be installed between the connecting plate and the sliding frame. The reset spring can reduce hard friction when the vibration motor is working, thereby increasing the service life of the device and achieving better vibration effect.

[0020] As a preferred solution of the present invention, two guiding heating plates are obliquely arranged in the inner cavity of the installation box and below the lower screen plate, and the two guiding heating plates are arranged in a staggered manner.

[0021] To implement the above technical solution, the staggered guide heating plates can play a guiding role, so that the dried soil can enter the feeding mechanism.

[0022] As a preferred solution of the present invention, the feeding mechanism includes: a rotating gear rotatably arranged in the inner cavity of the installation box, a placement seat fixed to the top of the rotating gear, a mixing barrel detachably arranged on the surface of the placement seat, a rack plate movably arranged in the inner cavity of the installation box and meshingly connected with the rotating gear, an electric telescopic rod arranged at the bottom of the inner cavity of the installation box, and a transmission plate arranged at the output end of the electric telescopic rod and fixedly connected to the rack plate.

[0023] To implement the above technical solution, the mixing drum can collect the dried soil on the guide heating plate, and the electric telescopic rod can be used to drive the transmission plate to move. When the transmission plate moves, it will drive the rack plate to move. When the rack plate moves, it will drive the rotating gear to rotate. When the rotating gear rotates, the mixing drum can be changed from a vertical state to other forms, which is convenient for the soil inside the mixing drum to enter the gas chromatograph. The mixing drum can not only collect soil, but also use other liquids to extract the soil for direct detection by the gas chromatograph.

[0024] As a preferred solution of the present invention, an air delivery mechanism is provided on the inner wall of the installation box, and the air delivery mechanism includes: a fixing frame fixed to the inner wall of the installation box, a plurality of placement grooves penetrating the interior of the fixing frame, rubber pads provided on both sides of the inner walls of the placement grooves, a positioning seat provided at the bottom of the inner cavity of the installation box and directly below the placement grooves, and an air path management component provided on the inner wall of the installation box and located above the fixing frame.

[0025] To implement the above technical solution, by utilizing the setting of the gas transmission mechanism, gas bottles such as nitrogen can be placed in the placement groove through the fixing frame, and then the bottom of the gas storage bottle can be positioned using the positioning seat, and then the installed gas storage bottle is connected to the gas path management component through the pipeline, and the gas path management component is connected to the gas chromatograph through the pipeline, thereby the gas transmission system of the gas chromatograph is complete, so that the gas chromatograph is fully equipped.

[0026] As a preferred solution of the present invention, an infusion mechanism is provided above the installation box, and the infusion mechanism includes: a fixed box arranged on the top of the installation box, a plurality of liquid storage tanks located inside the fixed box, a solenoid valve arranged on the outer surface of the liquid storage tank for controlling the flow of liquid, a connecting pipe interconnected with the solenoid valve, a delivery pipe interconnected with one of the solenoid valves and extending to the installation box, and an injection port arranged on the top of the liquid storage tank and extending to the outside of the fixed box.

[0027] To implement the above technical solution, the liquid required for soil extraction can be stored in a liquid storage tank by using the setting of the infusion mechanism, and then the flow rate of the liquid can be controlled by using a solenoid valve so that the liquid can enter the mixing cylinder through the delivery pipe, thereby being mixed with the soil for extraction. The mixing cylinder can be shaken by the reciprocating movement of the transmission plate, thereby achieving mixed extraction.

[0028] As a preferred solution of the present invention, the gas chromatograph is provided with a collecting mechanism, which includes: a receiving slot opened inside the gas chromatograph, a sample dish slidably arranged inside the receiving slot, and a fixing rod arranged at one end of the sample dish and fixedly connected to the transmission plate. To implement the above technical solution, by using the setting of the collecting mechanism, the sample dish can be driven to move by the fixing rod when the transmission plate moves, so that the sample dish is exposed to the inside of the gas chromatograph, and during the movement of the sample dish, the angle of the mixing barrel also changes, and finally the extracted soil enters the sample dish, and then the sample dish is sent back to the receiving slot by the movement of the transmission plate, and then the gas chromatograph can detect the extracted soil.

[0029] A method for measuring soil petroleum hydrocarbon content using an instrument comprises the following steps:

[0030] S1, soil sampling: move the device to the soil where sampling is required, start the servo motor and the drive motor, the servo motor drives the threaded screw to rotate when working, the threaded screw drives the transmission frame to descend through the screw sleeve and the fixed block, the drive motor drives the rotating shaft to rotate through the driving wheel and the driven wheel when working, the rotating shaft rotates through the connecting rod to drive the sampling tube to rotate, and the descending rotating sampling tube can collect soil;

[0031] S2, sampling soil screening: the upper sieve plate is driven to move to the bottom of the sampling tube through the work of the cylinder, and the soil is dropped onto the upper sieve plate through the vibration motor and the resonance plate, and the vibration motor is used for vibration screening;

[0032] S3, sampling soil extraction: the screened soil is transported to the mixing cylinder, and the liquid required for soil extraction is transported to the mixing cylinder through the infusion mechanism to achieve soil extraction;

[0033] S4, extraction soil transportation: using a loading mechanism to transport the extracted soil to a sample loading dish in a gas chromatograph;

[0034] S5, extraction soil testing: using gas chromatograph to test the soil on the sample dish.

[0035] In summary, the present invention has the following beneficial effects:

[0036] The embodiment of the present invention provides a soil petroleum hydrocarbon content measuring instrument and a measuring method. Through the arrangement of a gas chromatograph and a bottom plate, the gas chromatograph can perform real-time detection on the collected soil without the need to transport the soil, thereby reducing the soil detection cost and preventing the collected soil from changing during the transportation process, thereby improving the accuracy of the detection result.

[0037] Through the setting of the sampling mechanism, when the sampling tube descends during the rotation, it can drill into the soil. After drilling into the soil, the soil will remain inside the sampling tube. When the sampling tube stops rotating and rises, the soil deep in the ground can be brought out to complete the sampling process. Since the sampling mechanism can freely adjust the height according to the driving mechanism, it can sample and collect soil at different depths of the ground, thereby improving practicality and further improving the accuracy of soil detection.

[0038] Through the setting of the driving mechanism, the lifting and lowering control of the collecting mechanism is realized without manual operation, which reduces the labor of the collecting personnel, and the process does not require excessive manual intervention, so that the soil will not be polluted secondary. In addition, the collected soil will not affect the sampling personnel, which improves safety. In addition, through the setting of the sampling and processing mechanism, the sampled soil can be preliminarily processed to separate the large particles from the small particles in the soil, which is convenient for the detection of the gas chromatograph. The treated soil can be extracted by the feeding mechanism, and then the extracted soil is sent to the gas chromatograph for detection by the gas chromatograph, so that the soil does not need manual intervention during the detection process, which improves the cost rate of soil detection and further improves the efficiency of soil detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a schematic cross-sectional front view of the structure of the present invention.

[0041] Figure 2 It is a schematic side view of the structure of the limiting frame of the present invention.

[0042] Figure 3 A schematic side cross-sectional view of the structure of the fixing box of the present invention.

[0043] Figure 4 A schematic side cross-sectional view of the structure of the fixing bracket of the present invention.

[0044] Figure 5 A schematic side view of the structure of the delivery pipe of the present invention.

[0045] Figure 6 The present invention Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0046] Figure 7 The present invention Figure 1A magnified schematic diagram of the structure at point B in the middle.

[0047] The numbers and letters in the figure represent the corresponding component names:

[0048] 1. Bottom plate; 11. Installation box; 12. Base frame; 13. Limiting frame; 14. Closing window; 15. Push rod; 16. Universal wheel; 17. Gas chromatograph; 2. Transmission frame; 21. Rotating shaft; 22. Connecting rod; 23. Sampling tube; 24. Driving motor; 25. Driving wheel; 26. Driven wheel; 3. Servo motor; 31. Threaded screw; 32. Screw sleeve; 33. Fixed block; 34. Sliding rod; 35. Sliding sleeve; 4. Cylinder; 41. Control motor; 42. Connecting plate; 43. Sliding frame; 44. Upper Sieve plate; 45, resonance plate; 46, lower sieve plate; 47, vibration motor; 48, guide heating plate; 5, rotating gear; 51, placement seat; 52, mixing barrel; 53, rack plate; 54, electric telescopic rod; 55, transmission plate; 6, fixing frame; 61, placement slot; 62, rubber pad; 63, positioning seat; 64, air path management component; 7, fixing box; 71, liquid storage tank; 72, solenoid valve; 73, connecting pipe; 74, delivery pipe; 75, injection port; 8, storage tank; 81, sample dish; 82, fixing rod. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example

[0051] A soil petroleum hydrocarbon content measuring instrument, such as Figures 1 to 7, comprising: a bottom plate 1, an installation box 11 arranged on the bottom plate 1, a base frame 12 arranged on one side of the surface of the bottom plate 1, a limiting frame 13 arranged on the surface of the bottom plate 1 and located between the installation box 11 and the base frame 12, a gas chromatograph 17 for detecting the petroleum hydrocarbon content in the soil is arranged at the bottom of the inner cavity of the installation box 11; a sampling mechanism that can be lifted and lowered inside the limiting frame 13; the sampling mechanism comprises: a transmission frame 2 that can be slidably arranged inside the limiting frame 13, a rotating shaft 21 that can be rotatably penetrated inside the transmission frame 2, a sampling tube 23 arranged at the bottom end of the rotating shaft 21, a driving motor 24 whose output shaft extends to the inside of the transmission frame 2, and a rotatable transmission frame 2 that is fixedly connected to the output shaft of the driving motor 24. The driving mechanism comprises: a driving wheel 25 connected to the base frame 12, a driven wheel 26 sleeved on the outer surface of the rotating shaft 21 and connected to the driving wheel 25 through a belt; a driving mechanism arranged inside the base frame 12 and driving the sampling mechanism to rise and fall, a sampling and processing mechanism arranged inside the installation box 11, a loading mechanism arranged inside the installation box 11 and located below the sampling and processing mechanism, and a detection mechanism located inside the installation box 11; the driving mechanism includes: a servo motor 3 arranged at the top of the inner cavity of the base frame 12, a threaded screw 31 arranged on the output shaft of the servo motor 3 and rotatably connected to the base plate 1, a screw sleeve 32 threadedly connected to the outer surface of the threaded screw 31, and a fixing block 33 arranged on one side of the screw sleeve 32 and fixedly connected to the transmission frame 2.

[0052] By using the gas chromatograph 17 installed on the bottom plate 1, the collected soil can be tested in real time without the need to transport the soil, which reduces the cost of soil testing and prevents the collected soil from changing during the transportation process, thereby improving the accuracy of the test results. By using the setting of the sampling mechanism, the driving wheel 25 can be driven to rotate when the driving motor 24 is working. When the driving wheel 25 rotates, the driven wheel 26 will be driven to rotate through the belt. When the driven wheel 26 rotates, the connecting rod 22 will be driven to rotate through the rotating shaft 21. When the connecting rod 22 rotates, the sampling tube 23 will be driven to rotate. When the sampling tube 23 descends during the rotation process, it can be drilled into the soil. After drilling into the soil, the soil will remain inside the sampling tube 23. When the sampling tube 23 stops rotating and rises, the soil deep in the ground can be brought out to complete the sampling process. In order to facilitate drilling into the soil, the bottom of the sampling tube 23 is provided with an annular sawtooth at the bottom to make it more efficient. Since the sampling mechanism can freely adjust the height according to the driving mechanism, it can be used for sampling different ground surfaces. The servo motor 3 drives the screw rod 31 to rotate when working, and the screw rod 31 drives the transmission frame 2 to rise and fall through the screw rod 31 and the fixed block 33 when rotating, so as to realize the lifting and falling control of the collection mechanism, and no manual operation is required, which reduces the labor of the collection personnel, and the process does not require excessive manual intervention, so that the soil will not be polluted again. In addition, the collected soil will not affect the sampling personnel, which improves the safety. In addition, through the setting of the sampling and processing mechanism, the sampled soil can be preliminarily processed to separate the large particles from the small particles in the soil, which is convenient for the detection of the gas chromatograph 17. The processed soil can be extracted by the feeding mechanism, and then the extracted soil is sent to the gas chromatograph 17 for detection by the gas chromatograph 17, so that the soil does not need manual intervention at all during the detection process, which improves the cost rate of soil detection and further improves the efficiency of soil detection.

[0053] Specifically, a closed window 14 is rotatably provided on one side of the installation box 11 , a push rod 15 is fixedly connected to one side of the base frame 12 , and a plurality of universal wheels 16 are provided around the bottom of the base plate 1 .

[0054] The universal wheel 16 enables the base plate 1 to have a certain degree of mobility, so that the device can be moved to the vicinity of the soil to be tested, and then the soil can be sampled and tested, while the push rod 15 can facilitate the operator to push the device to move, and the closed window 14 can close the installation box 11, conversely, the installation box 11 can be opened to facilitate the cleaning and replacement of internal parts.

[0055] Slide rods 34 are vertically fixedly connected to the inner cavity of the limiting frame 13 and on both sides of the transmission frame 2 , and a sliding sleeve 35 slidably connected to the slide rods 34 is fixedly connected to the surface of the transmission frame 2 .

[0056] The sliding rod 34 can make the sliding sleeve 35 slide on its surface, thereby limiting the lifting and lowering of the transmission frame 2 and preventing the transmission frame 2 from rotating synchronously with the threaded screw 31 .

[0057] The sampling and processing mechanism includes: a cylinder 4 arranged horizontally on the inner wall of the installation box 11, a control motor 41 arranged at the output end of the cylinder 4, a connecting plate 42 arranged on the output shaft of the control motor 41, a sliding frame 43 connected to the connecting plate 42 for vertical sliding, an upper sieve plate 44 arranged on the other side of the sliding frame 43, a resonance plate 45 arranged on the surface of the upper sieve plate 44, a lower sieve plate 46 arranged on one side of the sliding frame 43 and located below the upper sieve plate 44, and a vibration motor 47 arranged on the other side of the upper sieve plate 44 and the lower sieve plate 46.

[0058] The upper sieve plate 44 can be moved to the bottom of the sampling tube 23 after the soil is collected by the operation of the cylinder 4, and the resonance plate 45 can be fitted with the side wall of the sampling tube 23. When the vibration motor 47 is working, the upper sieve plate 44 will be driven to vibrate. When the upper sieve plate 44 vibrates, the outer wall of the sampling tube 23 will be hit by the resonance plate 45, so that the sampling tube 23 will vibrate to a certain extent, so that the soil inside the sampling tube 23 can fall to the surface of the upper sieve plate 44, and then the upper sieve plate 44 is used to screen the soil, so that large particles of soil remain on the upper sieve plate 44, medium-sized particles of soil fall on the lower sieve plate 46, and small particles will be sieved through the lower sieve plate 46. Then, the upper sieve plate 44 is driven to move to the top of the guide heating plate 48 by the operation of the cylinder 4, and then the vibration is used. The motor 47 vibrates again, causing the soil remaining on the surface of the lower sieve plate 46 to fall through the sieve holes to the surface of the guide heating plate 48, and then the guide heating plate 48 is used to dry and guide the soil, causing the soil to fall into the feeding mechanism below, wherein the guide heating plate 48 can be replaced with other devices that can remove moisture from the soil and guide it according to actual needs, such as microwave heating and transportation, etc., and an existing sealing plug with an automatic opening and closing function can be set under the lower sieve plate 46 to facilitate the collection of small soils and prevent small soils from being unable to be collected. A reset spring can be installed between the connecting plate 42 and the sliding frame 43. The reset spring can be used to reduce hard friction when the vibration motor 47 is working, thereby increasing the service life of the device and achieving a better vibration effect.

[0059] In addition, the control motor 41 can control the connection plate 42 to rotate, thereby controlling the upper screen plate 44 to rotate. When the upper screen plate is located outside the installation box 11, the remaining soil can be cleaned by reverse rotation.

[0060] Two guiding heating plates 48 are obliquely disposed in the inner cavity of the installation box 11 and below the lower sieve plate 46 , and the two guiding heating plates 48 are arranged in a staggered manner.

[0061] The staggered guide heating plates 48 can play a guiding role, so that the dried soil can enter the feeding mechanism.

[0062] The feeding mechanism includes: a rotating gear 5 rotatably arranged in the inner cavity of the installation box 11, a placement seat 51 fixed to the top of the rotating gear 5, a mixing barrel 52 detachably arranged on the surface of the placement seat 51, a rack plate 53 movably arranged in the inner cavity of the installation box 11 and meshingly connected to the rotating gear 5, an electric telescopic rod 54 arranged at the bottom of the inner cavity of the installation box 11, and a transmission plate 55 arranged at the output end of the electric telescopic rod 54 and fixedly connected to the rack plate 53.

[0063] The mixing cylinder 52 can collect the dried soil on the guide heating plate 48, and the electric telescopic rod 54 can drive the transmission plate 55 to move. When the transmission plate 55 moves, it will drive the rack plate 53 to move. When the rack plate 53 moves, it will drive the rotating gear 5 to rotate. When the rotating gear 5 rotates, the mixing cylinder 52 can be changed from a vertical state to other states, so that the soil inside the mixing cylinder 52 can enter the gas chromatograph 17. The mixing cylinder 52 can not only collect soil, but also use other liquids to extract the soil for direct detection by the gas chromatograph 17.

[0064] An air supply mechanism is provided on the inner wall of the installation box 11, and the air supply mechanism includes: a fixing frame 6 fixed to the inner wall of the installation box 11, a plurality of placement grooves 61 penetrating the interior of the fixing frame 6, rubber pads 62 provided on both sides of the inner walls of the placement grooves 61, a positioning seat 63 provided at the bottom of the inner cavity of the installation box 11 and directly below the placement grooves 61, and an air path management component 64 provided on the inner wall of the installation box 11 and above the fixing frame 6.

[0065] By utilizing the setting of the gas transmission mechanism, gas bottles such as nitrogen can be placed in the placement groove 61 through the fixing frame 6, and then the bottom of the gas storage bottle can be positioned using the positioning seat 63, and then the installed gas storage bottle is connected to the gas path management component 64 through a pipeline, and the gas path management component 64 is connected to the gas chromatograph 17 through a pipeline, thereby the gas transmission system of the gas chromatograph 17 is complete, so that the gas chromatograph 17 is fully equipped.

[0066] An infusion mechanism is provided above the installation box 11, and the infusion mechanism includes: a fixed box 7 provided on the top of the installation box 11, a plurality of liquid storage tanks 71 located inside the fixed box 7, a solenoid valve 72 provided on the outer surface of the liquid storage tank 71 for controlling the flow of liquid, a connecting pipe 73 interconnected with the solenoid valve 72, a delivery pipe 74 interconnected with one of the solenoid valves 72 and extending to the installation box 11, and an injection port 75 provided on the top of the liquid storage tank 71 and extending to the outside of the fixed box 7.

[0067] By utilizing the setting of the infusion mechanism, the liquid required for soil extraction can be stored in the liquid storage tank 71, and then the solenoid valve 72 is used to control the flow of the liquid so that the liquid can enter the mixing cylinder 52 through the delivery pipe 74, thereby being mixed with the soil for extraction. The mixing cylinder 52 can be shaken by the reciprocating movement of the transmission plate 55, thereby achieving mixed extraction.

[0068] The gas chromatograph 17 is provided with a collecting mechanism, which includes: a receiving slot 8 opened inside the gas chromatograph 17, a sample dish 81 slidably arranged inside the receiving slot 8, and a fixing rod 82 arranged at one end of the sample dish 81 and fixedly connected to the transmission plate 55.

[0069] By utilizing the setting of the collecting mechanism, the sample dish 81 can be driven to move by the fixing rod 82 when the transmission plate 55 moves, so that the sample dish 81 is exposed to the inside of the gas chromatograph 17, and during the movement of the sample dish 81, the angle of the mixing cylinder 52 also changes, so that the extracted soil finally enters the sample dish 81, and then the sample dish 81 is sent back to the receiving tank 8 by the movement of the transmission plate 55, and then the gas chromatograph 17 can detect the extracted soil.

[0070] A method for measuring the petroleum hydrocarbon content in soil by a measuring instrument, comprising the following steps: S1, soil sampling: moving the device to the soil where sampling is required, starting the servo motor 3 and the drive motor 24, the servo motor 3 drives the threaded screw 31 to rotate when working, the threaded screw 31 drives the transmission frame 2 to descend through the screw sleeve 32 and the fixed block 33, the drive motor 24 drives the rotating shaft 21 to rotate through the driving wheel 25 and the driven wheel 26 when working, the rotating shaft 21 rotates through the connecting rod 22 to drive the sampling tube 23 to rotate, and the descending rotating sampling tube 23 can collect soil; S2, sampling soil screening: through the air The operation of the cylinder 4 drives the upper sieve plate 44 to move to the bottom of the sampling tube 23, and the soil is dropped onto the upper sieve plate 44 through the vibration motor 47 and the resonance plate 45, and the vibration motor 47 is used for vibration screening; S3, sampling soil extraction: the screened soil is transported to the mixing cylinder 52, and the liquid required for soil extraction is transported to the mixing cylinder through the infusion mechanism to achieve soil extraction; S4, extraction soil transportation: the extracted soil is transported to the sample dish 81 in the gas chromatograph 17 by the feeding mechanism; S5, extraction soil detection: the soil on the sample dish 81 is detected by the gas chromatograph 17.

[0071] Working principle: first push the bottom plate 1 to the soil where sampling is required, and then make the servo motor 3 and the drive motor 24 work through the control system in the existing technology. When the servo motor 3 works, it will drive the threaded screw 31 to rotate. When the threaded screw 31 rotates, it will drive the screw sleeve 32 to descend through the thread energy. When the screw sleeve 32 descends, it will drive the transmission frame 2 to descend through the fixed block 33. When the drive motor 24 works, it will drive the driving wheel 25 to rotate. When the driving wheel 25 rotates, it will drive the driven wheel 26 to rotate through the belt. When the driven wheel 26 rotates, it will drive the sampling tube 23 to rotate through the rotating shaft 21 and the connecting rod 22. When the sampling tube 23 contacts the ground, it can be used to drill into the ground by rotation, so as to bring out the soil deep in the ground to achieve soil sampling. After sampling, the sampling tube 23 is raised, and then the cylinder 4 is used to make the upper sieve plate 44 located below the sampling tube 23, and the resonance plate 45 is made to fit the outer wall of the sampling tube 23. When the vibration motor 47 works, it will drive the upper sieve plate 44 to vibrate. When the upper sieve plate 44 vibrates, it will pass through the resonance plate The outer wall of the sampling tube 23 is hit by the air cylinder 45, so that the sampling tube 23 vibrates to a certain extent, so that the soil inside the sampling tube 23 can fall to the surface of the upper sieve plate 44, and then the upper sieve plate 44 is used to screen the soil, so that large particles of soil remain on the upper sieve plate 44, and medium-sized particles of soil fall to the lower sieve plate 46, and small particles are screened through the lower sieve plate 46. Then, the upper sieve plate 44 is driven by the cylinder 4 to move to the top of the guide heating plate 48, and then the vibration motor 47 is used to vibrate again, so that the lower sieve plate The soil remaining on the surface of the plate 46 falls through the sieve holes onto the surface of the guide heating plate 48, and then the guide heating plate 48 is used to dry and guide the soil so that the soil falls into the feeding mechanism below. Then, the liquid required for soil extraction is allowed to enter the mixing cylinder 52 by the infusion mechanism, and the mixing cylinder 52 is shaken by the feeding mechanism to complete the soil extraction. Finally, the feeding mechanism is used to pour the extracted soil into the sample dish 81, and then the soil is tested by the gas chromatograph 17 to complete the real-time detection of the soil.

[0072] In summary, the present invention has the following beneficial effects:

[0073] The embodiment of the present invention provides a soil petroleum hydrocarbon content measuring instrument and determination method. Through the arrangement of the gas chromatograph 17 and the bottom plate 1, the gas chromatograph 17 can perform real-time detection on the collected soil without the need to transport the soil, thereby reducing the soil detection cost and preventing the collected soil from changing during the transportation process, thereby improving the accuracy of the detection result.

[0074] Through the setting of the sampling mechanism, when the sampling tube 23 descends during the rotation, it can drill into the soil. After drilling into the soil, the soil will remain inside the sampling tube 23. When the sampling tube 23 stops rotating and rises, the soil deep in the ground can be brought out to complete the sampling process. Since the sampling mechanism can freely adjust the height according to the driving mechanism, it can sample and collect soil at different depths of the ground, thereby improving practicality and further improving the accuracy of soil detection.

[0075] By setting up the driving mechanism, the lifting and lowering control of the collecting mechanism is realized without manual operation, which reduces the labor of the collecting personnel, and the process does not require excessive manual intervention, so that the soil will not be polluted again. In addition, the collected soil will not affect the sampling personnel, which improves safety. In addition, by setting up the sampling and processing mechanism, the sampled soil can be preliminarily processed to separate the large particles from the small particles in the soil, which is convenient for the detection of the gas chromatograph 17. The processed soil can be extracted by the feeding mechanism, and then the extracted soil is sent to the gas chromatograph 17 for detection by the gas chromatograph 17, so that the soil does not require manual intervention during the detection process, thereby improving the cost rate of soil detection and further improving the efficiency of soil detection.

[0076] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A soil petroleum hydrocarbon content measuring instrument, characterized in that: include: A bottom plate, an installation box arranged on the bottom plate, a base frame arranged on one side of the bottom plate surface, a limiting frame arranged on the bottom plate surface and located between the installation box and the base frame, a gas chromatograph for detecting the petroleum hydrocarbon content in the soil is arranged at the bottom of the inner cavity of the installation box; a sampling mechanism arranged inside the limiting frame in a liftable manner; the sampling mechanism includes: a transmission frame slidably arranged inside the limiting frame, a rotating shaft rotatably penetrating inside the transmission frame, a sampling tube arranged at the bottom end of the rotating shaft, a driving motor whose output shaft extends to the inside of the transmission frame, a driving wheel rotatably arranged inside the transmission frame and fixedly connected to the output shaft of the driving motor, and A driven wheel sleeved on the outer surface of the rotating shaft and connected to the driving wheel through a belt; a driving mechanism arranged inside the base frame and driving the sampling mechanism to rise and fall, a sampling and processing mechanism arranged inside the installation box, a feeding mechanism arranged inside the installation box and located below the sampling and processing mechanism, and a detection mechanism located inside the installation box; the driving mechanism includes: a servo motor arranged at the top of the inner cavity of the base frame, a threaded screw arranged on the output shaft of the servo motor and rotatably connected to the bottom plate, a screw sleeve threadedly connected to the outer surface of the threaded screw, and a fixed block arranged on one side of the screw sleeve and fixedly connected to the transmission frame; A closed window is rotatably provided on one side of the installation box, a push rod is fixedly connected to one side of the base frame, and a plurality of universal wheels are provided around the bottom of the base plate; The inner cavity of the limit frame and the two sides of the transmission frame are vertically fixedly connected with sliding rods, and the surface of the transmission frame is fixedly connected with sliding sleeves slidably connected with the sliding rods; The sampling and processing mechanism comprises: a cylinder disposed transversely on the inner wall of the installation box, a control motor disposed at the output end of the cylinder, a connecting plate disposed on the output shaft of the control motor, a sliding frame connected to the connecting plate in an up-and-down sliding manner, an upper sieve plate disposed on the other side of the sliding frame, a resonance plate disposed on the surface of the upper sieve plate, a lower sieve plate disposed on one side of the sliding frame and located below the upper sieve plate, and a vibration motor disposed on the other side of the upper sieve plate and the lower sieve plate; Two guiding heating plates are obliquely arranged in the inner cavity of the installation box and below the lower screen plate, and the two guiding heating plates are arranged in a staggered manner; A sealing plug with automatic opening and closing function is arranged below the lower screen plate; The feeding mechanism includes: a rotating gear rotatably arranged in the inner cavity of the installation box, a placement seat fixed to the top of the rotating gear, a mixing barrel detachably arranged on the surface of the placement seat, a rack plate movably arranged in the inner cavity of the installation box and meshingly connected to the rotating gear, an electric telescopic rod arranged at the bottom of the inner cavity of the installation box, and a transmission plate arranged at the output end of the electric telescopic rod and fixedly connected to the rack plate.

2. The soil petroleum hydrocarbon content measuring instrument according to claim 1, characterized in that: An air delivery mechanism is provided on the inner wall of the installation box, and the air delivery mechanism includes: a fixing frame fixed to the inner wall of the installation box, a plurality of placement grooves penetrating the inside of the fixing frame, rubber pads provided on both sides of the inner walls of the placement grooves, a positioning seat provided at the bottom of the inner cavity of the installation box and directly below the placement grooves, and an air path management component provided on the inner wall of the installation box and above the fixing frame.

3. The soil petroleum hydrocarbon content measuring instrument according to claim 1, characterized in that: An infusion mechanism is provided above the installation box, and the infusion mechanism includes: a fixed box provided on the top of the installation box, a plurality of liquid storage tanks located inside the fixed box, an electromagnetic valve provided on the outer surface of the liquid storage tank for controlling the flow of liquid, a connecting pipe interconnected with the electromagnetic valve, a delivery pipe interconnected with one of the electromagnetic valves and extending to the installation box, and an injection port provided on the top of the liquid storage tank and extending to the outside of the fixed box.

4. The soil petroleum hydrocarbon content measuring instrument according to claim 1, characterized in that: The gas chromatograph is provided with a collecting mechanism, which includes: a receiving slot opened inside the gas chromatograph, a sample dish slidably arranged inside the receiving slot, and a fixing rod arranged at one end of the sample dish and fixedly connected to the transmission plate.

5. A method for measuring the petroleum hydrocarbon content in soil according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, soil sampling: the soil petroleum hydrocarbon content measuring instrument is moved to the soil where sampling is required, and the servo motor and the drive motor are started. When the servo motor is working, the threaded screw is driven to rotate, and the threaded screw drives the transmission frame to descend through the screw sleeve and the fixed block. When the drive motor is working, the rotating shaft is driven to rotate through the driving wheel and the driven wheel. The rotating shaft rotates and drives the sampling tube to rotate through the connecting rod. The descending rotating sampling tube collects soil; S2, sampling soil screening: the upper sieve plate is driven to move to the bottom of the sampling tube through the work of the cylinder, and the soil is dropped onto the upper sieve plate through the vibration motor and the resonance plate, and the vibration motor is used for vibration screening; S3, soil sampling and extraction: the screened soil is transported to the mixing cylinder, and the liquid required for soil extraction is transported to the mixing cylinder through the infusion mechanism, and the mixing cylinder is shaken by the reciprocating movement of the transmission plate to achieve soil mixing and extraction; S4, extraction soil transportation: using a loading mechanism to transport the extracted soil to a sample loading dish in a gas chromatograph; S5, extraction soil testing: using gas chromatograph to test the soil on the sample dish.

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