Automatic sampler for petroleum detection

Abstract

When petroleum in a petroleum storage tank is sampled, liquid to be sampled is subjected to two-stage filtration through a grating ring and a filter cartridge, and impurity particles are centrifugally extruded by using the rotating grating ring, so that the probability that the impurity particles are accumulated on the surface of the grating ring is reduced, and meanwhile, the probability that the impurity particles are accumulated on the surface of the grating ring is reduced. The surface of the filter cartridge is rotationally scraped through a grating plate on a grating ring and a scraper, so that the probability that impurity particles block inner filter holes is reduced, and the problems of low sampling efficiency and even sampling failure caused by the fact that a filter screen of a traditional sampling device is easily blocked are solved; in addition, through the inertia ring, the impurity particles entering the outer filter holes of the grating ring are subjected to inertia extrusion, so that the blocking probability of the outer filter holes of the grating ring is further reduced; in addition, through a second piston arranged in the filter cartridge and an extrusion rod matched with the inner filter hole, the inner filter hole is subjected to backwashing and extrusion cleaning, and the blocking probability of the inner filter hole is further reduced.

Description

Technical Field

[0001] The present invention relates to a sampler, and particularly to an automatic sampler for oil detection applied to the detection field. Background Art

[0002] The oil mined underground needs to be stored in an oil storage tank. When detecting the oil quality, a detection sampler is required for sampling. During sampling, since the oil still contains many impurity particles, impurity liquids, and viscous oil lumps, these impurity particles and viscous lumps are likely to block the sampling port of the sampler. Generally, a filter screen is arranged at the sampling port of the sampler to intercept the particulate impurities and viscous lumps. Although the filter screen of a general sampler can intercept impurities, the filter screen is easily blocked by impurities, resulting in difficult sampling.

[0003] A patent with the publication number CN108387404B in the prior art discloses an oil detection sampler, which includes a cylinder body, a first feed port, a feeding mechanism, a sampler, a fixing mechanism, a second feed port, a cleaning mechanism, a lifting mechanism, a connecting mechanism, a first limiting mechanism, a housing, and a second limiting mechanism. The bottom end of the cylinder body is a conical structure, which is convenient for the cylinder body to enter the interior of the oil. A plurality of samplers are arranged inside the cylinder body. When the cylinder body enters the interior of the oil, the oil samples at different levels inside the storage tank respectively enter the interiors of the plurality of samplers, facilitating people to take out the use samples at different positions from inside the storage tank; A plurality of feeding mechanisms are installed on the side wall of the cylinder body. After the cylinder body is fixed inside the oil, when the feeding mechanism is opened, the oil can enter the interior of the sampler, preventing the oil at different levels from mixing into the interior of the sampler and ensuring the accuracy of the oil sample.

[0004] The above prior art discloses a plurality of samplers and feeding mechanisms to achieve sampling at different depths, but it does not solve the problem that the filter screen in the oil is easily blocked by impurity particles and viscous lumps, resulting in difficult sampling. Summary of the Invention

[0005] Aiming at the above prior art, the technical problem to be solved by the present invention is that the filter screen of the existing detection sampler is easily blocked by impurities, resulting in difficult sampling.

[0006] To solve the above problems, the present invention provides an automatic sampler for petroleum detection, which includes a sampling cylinder and a sampling rod fixedly connected to the upper end thereof. The sampling cylinder includes a middle cylinder, an upper cylinder and a lower cylinder fixedly connected to both ends of the middle cylinder; a grille ring is rotatably connected to the outer end of the middle cylinder, and a filter cylinder abutting against the inner wall of the grille ring is fixedly connected to the inner end of the middle cylinder. The filter cylinder is provided with evenly distributed inner filter holes on the side facing the grille ring; a suction pipe extending into the upper cylinder is fixedly connected to the outer end of the filter cylinder, and an insertion cylinder is fixedly connected to the upper end of the suction pipe. A syringe is inserted into the insertion cylinder, and a locking bolt movably penetrating the insertion cylinder is threadedly connected to the side wall of the syringe; a first piston is slidably connected in the syringe, and the first piston is connected to a first power mechanism that drives it to move along the axial direction of the syringe. The grille ring includes a pair of rectangular rings and a plurality of grille plates fixed between the pair of rectangular rings and evenly distributed in a circumferential manner. Outer filter holes matching the inner filter holes are formed between adjacent grille plates. When the outer filter holes rotate to the position of the filter cylinder, the liquid flows into the inner filter holes after passing through the outer filter holes. A toothed ring rotatably connected to the middle cylinder is fixedly connected to the lower end of the grille ring, and a driving gear extending into the lower cylinder is engaged with the lower end of the toothed ring. The driving gear is fixedly connected to the output shaft of a first motor, and the first motor is fixedly connected to the lower end face of the middle cylinder.

[0007] In the above automatic sampler for petroleum detection, by providing a rotating grille and a filter cylinder, the probability of filter clogging is reduced and the sampling quality is improved.

[0008] As a further improvement of the present application, the number of filter cylinders is multiple and evenly distributed in a circumferential manner, and the number of syringes is the same as the number of filter cylinders. The first power mechanism includes a clamping frame movably clamped with the first piston. The side end of the clamping frame is slidably connected to the inner wall of the upper cylinder. The upper end of the clamping frame is rotatably connected to a groove cylinder. When the groove cylinder rotates, it drives the clamping frame to move upward. The groove cylinder is rotatably connected to the inner wall of the upper cylinder, and the inner side of the groove cylinder is fixedly connected to the output shaft of a second motor, and the second motor is fixedly connected to the inner wall of the upper cylinder.

[0009] As a further improvement of the present application, a second piston is slidably connected in the filter cylinder. The second piston is fixedly connected to a clamping frame extending outside the filter cylinder. The clamping frame is rotatably connected to a groove disk, and the groove disk is fixedly connected to the output shaft of a third motor. The third motor is arranged in the lower cylinder and fixedly connected to the lower end face of the middle cylinder; a one-way valve is installed in the suction pipe.

[0010] As a further improvement of the present application, the inner filter holes include a columnar hole close to the grille ring side and a tapered hole communicating with the columnar hole. The tapered hole is close to the second piston side; an extrusion rod is inserted into the columnar hole, and the end of the extrusion rod away from the inner filter hole is fixedly connected to the second piston.

[0011] As a further improvement of the present application, a grille ring is slidably connected with an inertia ring. The inertia ring includes a circular ring and a plurality of equally spaced counterweight balls fixedly connected to the circular ring. The circular ring penetrates through the grille plate and is slidably connected with the grille plate. The counterweight balls are located in the outer filter holes between adjacent grille plates. A scraper is provided on the inner wall of one side of the grille plate facing the middle cylinder. One side of the scraper away from the middle cylinder is fixedly connected with a spring piece, and the spring piece is fixedly connected with the inner wall of the grille plate. The spring piece enables the scraper to elastically abut against the circumferential side wall of the first annular groove.

[0012] As a further improvement of the present application, a first sliding column is fixedly connected to the inner side of the upper end of the clamping frame. A first guiding groove cooperating with the first sliding column is formed on the circumferential outer wall of the groove cylinder. A clamping slot for clamping the upper end of the first piston is formed at the lower end of the clamping frame.

[0013] As a further improvement of the present application, the first guiding groove is an annular wave groove formed on the outer wall of the groove cylinder, and the number of wave crests of the annular wave groove is equal to the number of syringes.

[0014] As a further improvement of the present application, the first guiding groove includes a closed circular groove formed in the upper part of the groove cylinder and a notched circular groove formed in the lower part of the groove cylinder. One end of the notched circular groove communicates with a spiral groove, and the upper end of the spiral groove communicates with the closed circular groove.

[0015] As a further improvement of the present application, second guiding grooves are formed on both the upper and lower end faces of the groove disc. The second guiding groove includes an arc groove and an inner groove communicating with the arc groove. A pair of second sliding columns are fixedly connected to the clamping frame, and the second sliding columns are slidably connected with the second guiding groove.

[0016] As a further improvement of the present application, a flow sensor is fixedly connected in the suction pipe. The flow sensor is electrically connected with a controller. The controller is fixed in the lower cylinder. The first motor, the second motor and the third motor are all electrically connected with the controller.

[0017] In summary, the present invention filters the liquid to be sampled through the grille ring and the filter cylinder at two levels, and uses the rotating grille ring to centrifugally extrude the impurity particles, reducing the probability of impurity particles accumulating on the surface of the grille ring, facilitating the smooth extraction of the sampled liquid. At the same time, the surface of the filter cylinder is rotationally scraped by the grille plate and the scraper on the grille ring, reducing the probability of impurity particles blocking the inner filter holes, overcoming the problem that the filter screen of the traditional sampling device is easily blocked, resulting in low sampling efficiency or even sampling failure; in addition, through the inertia ring slidably connected with the grille ring, the impurity particles entering the outer filter holes of the grille ring are subjected to inertial extrusion, further reducing the probability of blockage of the outer filter holes of the grille ring; furthermore, through the second piston arranged in the filter cylinder and the extrusion rod adapted to the inner filter holes, the inner filter holes are backwashed and squeezed and cleaned, further reducing the probability of blockage of the inner filter holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the present application; Figure 2 Schematic diagram of the three-dimensional structure of the sampling cylinder; Figure 3 Transverse sectional structure of the present application; Figure 4 For Figure 3 Enlarged schematic diagram of the structure at A in Figure 5 Schematic diagram of the assembly structure of the grille ring and the middle cylinder in the present application; Figure 6 Schematic diagram of the assembly structure of the syringe and the middle cylinder in the present application; Figure 7 Schematic diagram of the syringe in the state of drawing liquid; Figure 8 For Figure 3 Schematic diagram of the structure at B in Figure 9 Schematic diagram of the assembly structure of the filter cylinder and the middle cylinder in the present application; Figure 10 Schematic diagram of the state of the groove disk rotating unidirectionally; Figure 11 Schematic diagram of the state of the groove disk rotating reciprocally.

[0019] Explanation of the reference numerals in the figure: 1. Sampling cylinder; 2. Sampling rod; 3. Upper cylinder; 301. Side cover plate; 4. Middle cylinder; 401. First annular groove; 402. Second annular groove; 403. Hollowed-out groove; 404. Mounting hole; 405. Central cavity; 5. Lower cylinder; 6. Grille ring; 601. Rectangular ring; 602. Grille plate; 603. Outer filter hole; 7. Inertia ring; 701. Circular ring; 702. Counterweight ball; 8. Scraper; 9. Spring piece; 10. Tooth ring; 11. Driving gear; 12. First motor; 13. Filter cylinder; 1301. Inner filter hole; 1302. Columnar hole; 1303. Conical hole; 14. Suction pipe; 15. Insertion cylinder; 16. Syringe; 17. Locking bolt; 18. Check valve; 19. First piston; 20. Clamping frame; 21. First sliding column; 22. Groove cylinder; 23. First guide groove; 2301. Notched circular groove; 2302. Spiral groove; 2303. Closed circular groove; 24. Second motor; 25. Second piston; 26. Extrusion rod; 27. Clamping frame; 2701. Second sliding column; 28. Groove disk; 2801. Second guide groove; 2802. Arc groove; 2803. Inner groove; 29. Third motor; 30. Flow sensor; 31. Controller. Detailed Description of the Invention

[0020] The following describes in detail two embodiments of the present application with reference to the accompanying drawings.

[0021] The first implementation mode: Figures 1-7 An automatic sampler for oil detection is shown, which includes a sampling cylinder 1 and a sampling rod 2 fixedly connected to its upper end. The sampling cylinder 1 includes a middle cylinder 4, and an upper cylinder 3 and a lower cylinder 5 fixedly connected to both ends of the middle cylinder 4; a grille ring 6 is rotatably connected to the outer end of the middle cylinder 4, and a filter cylinder 13 abutting against the inner wall of the grille ring 6 is fixedly connected to the inner end of the middle cylinder 4. The filter cylinder 13 is provided with uniformly distributed inner filter holes 1301 on the side facing the grille ring 6; a suction pipe 14 extending into the upper cylinder 3 is fixedly communicated with the outer end of the filter cylinder 13, and an insertion cylinder 15 is fixedly communicated with the upper end of the suction pipe 14. A syringe 16 is inserted into the insertion cylinder 15, and a locking bolt 17 movably penetrating through the insertion cylinder 15 is threadedly connected to the side wall of the syringe 16; a first piston 19 is slidably connected in the syringe 16, and the first piston 19 is connected to a first power mechanism for driving it to move along the axial direction of the syringe 16. Please refer to Figure 4 and Figure 5 , the grille ring 6 includes a pair of rectangular rings 601 and a plurality of grille plates 602 fixed between the pair of rectangular rings 601 and evenly distributed in a circumferential manner. An outer filter hole 603 matching the inner filter hole 1301 is formed between adjacent grille plates 602. When the outer filter hole 603 rotates to the position of the filter cylinder 13, the liquid flows into the inner filter hole 1301 after passing through the outer filter hole 603. A toothed ring 10 rotatably connected to the middle cylinder 4 is fixedly connected to the lower end of the grille ring 6, and a driving gear 11 extending into the lower cylinder 5 is engaged with the lower end of the toothed ring 10. The driving gear 11 is fixedly connected to the output shaft of a first motor 12, and the first motor 12 is fixedly connected to the lower end face of the middle cylinder 4.

[0022] Specifically, please refer to Figure 7 , during sampling, the following steps are included: Step 1, put the sampling cylinder 1 into the oil layer at a specified depth in the storage tank through the sampling rod 2; Step 2, start the first power mechanism and the first motor 12. The first power mechanism drives the first piston 19 to move along the axial direction of the syringe 16. The syringe 16 sucks the liquid in the filter cylinder 13 through the insertion cylinder 15 and the suction pipe 14. A negative pressure is generated in the filter cylinder 13, so that the filter cylinder 13 sucks the liquid in the storage tank through the inner filter holes 1301; at the same time, the first motor 12 drives the toothed ring 10 to rotate through the driving gear 11, and the toothed ring 10 drives the grille ring 6 to rotate, and the grille ring 6 rotates and cleans the surface of the filter cylinder 13. Specifically, wait for the sampling liquid to enter the filter cylinder 13 through the outer filter hole 603 and the inner filter hole 1301, and then be injected into the syringe 16 through the suction pipe 14 and the insertion cylinder 15; the rotating grille ring 6 centrifugally squeezes the impurity particles accumulated on the outer surface of the grille ring 6, reducing the probability of the impurity particles accumulating and blocking the inner filter holes 1301. Step 3: After sampling is completed, turn off the first power mechanism and the first motor 12, then take out and open the sampling cylinder 1, turn and tighten the locking bolt 17, and then take out the syringe 16 to complete the liquid sampling operation.

[0023] Specifically, a side cover plate 301 is fixedly connected to the side wall of the upper cylinder 3 by means of bolts, which is convenient for taking and placing the syringe 16.

[0024] Compared with the traditional liquid sampling device, when sampling the oil in the oil storage tank, the present invention filters the liquid to be sampled through the grid ring 6 and the filter cylinder 13 in two stages, and utilizes the centrifugal force generated by the rotation of the grid ring 6 to reduce the probability of impurity particles accumulating on the surface of the grid ring 6 and improve the sampling efficiency; at the same time, the grid plate 602 provided on the grid ring 6 filters and cleans the surface of the filter cylinder 13, further reducing the probability of impurity particles blocking the inner filter holes 1301, and overcoming the problems of sampling failure or low sampling efficiency caused by the easy blockage of the filter screen of the traditional sampling device; in addition, the rotating grid ring 6 centrifugally stirs the oil near the sampling cylinder 1 to improve the fluidity of the oil near the sampling cylinder 1 and improve the sampling efficiency.

[0025] Please refer to Figure 2 and Figure 5 , the middle cylinder 4 is a cylindrical structure with an I-shaped cross-section. A first annular groove 401 for accommodating the grid ring 6 is provided on its side wall. A second annular groove 402 for accommodating the gear ring 10 is provided on the inner wall of the first annular groove 401. A hollow groove 403 communicating with the second annular groove 402 is provided below the middle cylinder 4 at the position of the second annular groove 402. The driving gear 11 passes through the hollow groove 403 and is meshed with the gear ring 10.

[0026] Specifically, the transmission between the driving gear 11 and the gear ring 10 is realized by providing the hollow groove 403.

[0027] Please refer to Figure 5 , an installation hole 404 for accommodating the filter cylinder 13 is provided on the circumferential side wall of the first annular groove 401. The filter cylinder 13 is threadedly connected to the inner wall of the installation hole 404. A central cavity 405 communicating with the installation hole 404 is provided at the central position of the middle cylinder 4. The outer end face of the filter cylinder 13 extends to the circumferential side wall of the first annular groove 401.

[0028] Specifically, it is convenient to disassemble and replace the filter cylinder 13.

[0029] Please refer to Figure 1 and 5 , an inertia ring 7 is slidably connected to the grid ring 6. The inertia ring 7 includes a circular ring 701 and a plurality of equally spaced counterweight balls 702 fixedly connected to the circular ring 701. The circular ring 701 passes through the grid plate 602 and is slidably connected to the grid plate 602. The counterweight balls 702 are located in the outer filter holes 603 between adjacent grid plates 602.

[0030] Specifically, when the grille ring 6 rotates, the counterweight ball 702 is squeezed by the grille plate 602, and the inertia ring 7 rotates along with the grille ring 6. Since the outer wall of the counterweight ball 702 is spherical, it is not easy for impurity particles to enter the outer filter holes 603. At the same time, after the impurity particles enter the outer filter holes 603, the counterweight ball 702 squeezes the impurity particles. And because impurity particles continuously enter and exit the circumferentially distributed outer filter holes 603, the center of gravity of the inertia ring 7 constantly changes. Under the action of centrifugal force, the inertia ring 7 reciprocally rotates along the grille ring 6, squeezing the impurity particles entering the outer filter holes 603 and reducing the probability of the impurity particles blocking in the outer filter holes 603.

[0031] Please refer to Figure 4 , a scraper 8 is provided on the inner wall of one side of the grille plate 602 facing the middle cylinder 4. A spring piece 9 is fixedly connected to the side of the scraper 8 away from the middle cylinder 4, and the spring piece 9 is fixedly connected to the inner wall of the grille plate 602. The spring piece 9 enables the scraper 8 to elastically abut against the circumferential side wall of the first annular groove 401.

[0032] Specifically, when the scraper 8 rotates along with the grille ring 6, the scraper 8 is elastically pressed against the outer wall of the filter cylinder 13 under the elastic action of the spring piece 9, improving the cleaning effect on the inner filter holes 1301 on the surface of the filter cylinder 13.

[0033] Please refer to Figure 6 and Figure 7 , the number of filter cylinders 13 is multiple and they are circumferentially equidistantly distributed. The number of syringes 16 is the same as the number of filter cylinders 13. The first power mechanism includes a clamping frame 20 that is movably clamped with the first piston 19. The side end of the clamping frame 20 is slidably connected to the inner wall of the upper cylinder 3. The upper end of the clamping frame 20 is rotatably connected to a groove cylinder 22. When the groove cylinder 22 rotates, it drives the clamping frame 20 to move upward. The groove cylinder 22 is rotatably connected to the inner wall of the upper cylinder 3. The output shaft of a second motor 24 is fixedly connected to the inner side of the groove cylinder 22, and the second motor 24 is fixedly connected to the inner wall of the upper cylinder 3.

[0034] Specifically, the groove cylinder 22 drives the clamping frame 20 to move upward, and the clamping frame 20 drives the first piston 19 to move axially along the syringe 16, realizing the negative pressure extraction of the syringe 16.

[0035] Please refer to Figure 3 and Figure 6 , a first sliding column 21 is fixedly connected to the inner side of the upper end of the clamping frame 20. A first guiding groove 23 that cooperates with the first sliding column 21 is formed on the circumferential outer wall of the groove cylinder 22. When the groove cylinder 22 rotates, the first guiding groove 23 squeezes the first sliding column 21, thereby driving the clamping frame 20 to move upward. A clamping slot for clamping the upper end of the first piston 19 is formed at the lower end of the clamping frame 20.

[0036] In this embodiment, the structure of the first guiding groove 23 has two setting modes, which have different effects respectively. Those skilled in the art can selectively implement according to needs, as follows: First, the first guiding groove 23 is an annular wavy groove opened on the outer wall of the drum 22, and the number of wave crests of the annular wavy groove is equal to the number of syringes 16.

[0037] Specifically, when the drum 22 rotates, the first sliding column 21 moves from the bottom position of the annular wavy groove to the wave crest position, realizing simultaneous sampling of multiple syringes 16, and simultaneous sampling of multiple water samples at the same sampling depth. It should be noted that the annular wavy groove is not shown in the figure. The annular wavy groove opened on the outer wall of the drum 22 is a prior art and will not be elaborated in this application. And when the first piston 19 is at the lowest point, the first sliding column 21 is at the bottom position of the annular wavy groove.

[0038] Second, please refer to Figure 6 , the first guiding groove 23 includes a closed circular groove 2303 opened on the upper part of the drum 22 and a notched circular groove 2301 opened on the lower part of the drum 22. One end of the notched circular groove 2301 is communicated with a spiral groove 2302, and the upper end of the spiral groove 2302 is communicated with the closed circular groove 2303.

[0039] Specifically, when the drum 22 rotates, the first sliding column 21 first slides in the notched circular groove 2303 one by one, and then moves upward one by one under the action of the spiral groove 2302, thereby driving the clamping frame 20 and the first piston 19 to move upward, and finally moving into the closed circular groove 2301, realizing the extraction of the syringes 16 one by one. It should be noted that a Hall sensor for monitoring the rotation angle of the output shaft is installed in the second motor 24, thereby realizing multiple samplings at different depths in one operation and improving the overall sampling efficiency.

[0040] The second implementation mode: Figures 8-11 An automatic sampler for oil detection is shown. On the basis of the first implementation mode, a second piston 25 is slidably connected in the filter cylinder 13. The second piston 25 is fixedly connected with a clamping frame 27 extending outside the filter cylinder 13. The clamping frame 27 is rotatably connected with a groove disk 28. The rotating groove disk 28 drives the clamping frame 27 to reciprocate in the filter cylinder 13. The groove disk 28 is fixedly connected with the output shaft of a third motor 29. The third motor 29 is arranged in the lower cylinder 5 and fixedly connected with the lower end face of the middle cylinder 4; a one-way valve 18 is installed in the suction pipe 14, and the one-way valve 18 allows the liquid to only flow from the suction pipe 14 into the insertion cylinder 15.

[0041] Specifically, please refer to Figure 11, the third motor 29 drives the groove disc 28 to rotate. The groove disc 28 drives the second piston 25 to reciprocate in the filter cylinder 13 through the clamping frame 27, so that the filter cylinder 13 has a suction force, which cooperates with the negative pressure suction force generated by the syringe 16 to improve the negative pressure suction effect, suck the external liquid, and reverse flush the inner filter holes 1301 with the sucked liquid to clean the blocked particles in the inner filter holes 1301. It should be noted that when the third motor 29 drives the groove disc 28 to reciprocate, the groove disc 28 drives the second piston 25 to reciprocate horizontally in the filter cylinder 13.

[0042] Please refer to Figure 9 , both the upper and lower end faces of the groove disc 28 are provided with second guide grooves 2801. The second guide grooves 2801 include arc grooves 2802 and inner grooves 2803 communicating with the arc grooves 2802. A pair of second sliding columns 2701 are fixedly connected to the clamping frame 27, and the second sliding columns 2701 are slidably connected to the second guide grooves 2801.

[0043] Specifically, when the second sliding column 2701 passes through the inner groove 2803, it drives the clamping frame 27 to reciprocate.

[0044] Please refer to Figure 8 , the inner filter holes 1301 include columnar holes 1302 near the grille ring 6 and tapered holes 1303 communicating with the columnar holes 1302. The tapered holes 1303 are close to the second piston 25; an extrusion rod 26 is inserted into the columnar holes 1302, and one end of the extrusion rod 26 away from the inner filter holes 1301 is fixedly connected to the second piston 25.

[0045] Specifically, the inner filter holes 1301 of the filter cylinder 13 are blocked by the extrusion rod 26. At the same time, the inner filter holes 1301 are dredged by the extrusion rod 26 to further improve the dredging effect of the inner filter holes 1301; the tapered holes 1303 are provided to increase the extrusion effect on the backwashing liquid and improve the washing effect. It should be noted that a Hall sensor for monitoring the rotation angle and position of the output shaft of the third motor 29 is installed in the third motor 29. When multiple syringes 16 perform sampling at one time, the inner groove 2803 of the groove disc 28 rotates to the corresponding position of the filter cylinder 13, and the reciprocating rotation of the groove disc 28 is used to drive the corresponding second piston 25 to reciprocate in the filter cylinder 13 to realize the extrusion dredging and backwashing of the inner filter holes 1301 of the corresponding filter cylinder 13.

[0046] Please refer to Figure 3 and Figure 8 , a flow sensor 30 is fixedly connected in the suction pipe 14. The flow sensor 30 is electrically connected to a controller 31. The controller 31 is fixed in the lower cylinder 5. The first motor 12, the second motor 24, and the third motor 29 are all electrically connected to the controller 31.

[0047] Specifically, the flow rate of the suction pipe 14 at the lower part of the syringe 16 being sampled is monitored by the flow sensor 30. When the real-time flow rate value is lower than the set flow rate threshold, the third motor 29 is started, causing the second piston 25 to reciprocate within the filter cylinder 13, enhancing the pertinence of the cleaning operation. It should be noted that during the sampling process at different depths, the positions of the grooved cylinder 22 and the grooved disk 28 are monitored by the Hall sensors within the second motor 24 and the third motor 29. During sampling, the extrusion rod 26 is disengaged from the columnar hole 1302, and when dredging is required, the second piston 25 drives the extrusion rod 26 to reciprocate to achieve precise control.

[0048] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An automatic sampler for oil detection, characterized in that, It includes a sampling cylinder (1) and a sampling rod (2) fixedly connected to the upper end thereof. The sampling cylinder (1) includes a middle cylinder (4), and an upper cylinder (3) and a lower cylinder (5) fixedly connected to both ends of the middle cylinder (4); a grille ring (6) is rotatably connected to the outer end of the middle cylinder (4), and a filter cylinder (13) abutting against the inner wall of the grille ring (6) is fixedly connected to the inner end of the middle cylinder (4). The side of the filter cylinder (13) facing the grille ring (6) is provided with evenly distributed inner filter holes (1301); the outer end of the filter cylinder (13) is fixedly communicated with a suction pipe (14) extending into the upper cylinder (3), the upper end of the suction pipe (14) is fixedly communicated with a socket cylinder (15), a syringe (16) is inserted into the socket cylinder (15), and a locking bolt (17) movably penetrating through the socket cylinder (15) is threadedly connected to the side wall of the syringe (16); a first piston (19) is slidably connected in the syringe (16), and the first piston (19) is connected to a first power mechanism for driving it to move along the axial direction of the syringe (16). The grille ring (6) includes a pair of rectangular rings (601) and a plurality of grille plates (602) fixed between the pair of rectangular rings (601) and evenly distributed in a circumferential manner. An outer filter hole (603) matching the inner filter hole (1301) is formed between adjacent grille plates (602). When the outer filter hole (603) rotates to the position of the filter cylinder (13), the liquid flows into the inner filter hole (1301) after passing through the outer filter hole (603). A toothed ring (10) rotatably connected to the middle cylinder (4) is fixedly connected to the lower end of the grille ring (6). A driving gear (11) extending into the lower cylinder (5) is engaged with the lower end of the toothed ring (10). The driving gear (11) is fixedly connected to the output shaft of a first motor (12), and the first motor (12) is fixedly connected to the lower end face of the middle cylinder (4).

2. The automatic sampler for oil detection according to claim 1, wherein The number of the filter cylinders (13) is multiple and evenly distributed in a circumferential manner. The number of the syringes (16) is the same as that of the filter cylinders (13). The first power mechanism includes a clamping frame (20) movably clamped with the first piston (19). The side end of the clamping frame (20) is slidably connected to the inner wall of the upper cylinder (3). A groove cylinder (22) is rotatably connected to the upper end of the clamping frame (20). When the groove cylinder (22) rotates, it drives the clamping frame (20) to move upward. The groove cylinder (22) is rotatably connected to the inner wall of the upper cylinder (3). The inner side of the groove cylinder (22) is fixedly connected to the output shaft of a second motor (24), and the second motor (24) is fixedly connected to the inner wall of the upper cylinder (3).

3. The automatic sampler for petroleum detection according to claim 2, characterized in that, A second piston (25) is slidably connected in the filter cylinder (13). The second piston (25) is fixedly connected to a clamping frame (27) extending outside the filter cylinder (13). A groove disk (28) is rotatably connected to the clamping frame (27). The groove disk (28) is fixedly connected to the output shaft of a third motor (29). The third motor (29) is arranged in the lower cylinder (5) and fixedly connected to the lower end face of the middle cylinder (4); a one-way valve (18) is installed in the suction pipe (14).

4. The automatic sampler for oil detection according to claim 3, characterized in that, The inner filter holes (1301) include columnar holes (1302) near one side of the grille ring (6) and tapered holes (1303) communicating with the columnar holes (1302), and the tapered holes (1303) are near one side of the second piston (25); an extrusion rod (26) is inserted into the columnar holes (1302), and one end of the extrusion rod (26) away from the inner filter holes (1301) is fixedly connected to the second piston (25).

5. An automatic sampler for oil detection according to claim 1, characterized in that, An inertia ring (7) is slidably connected to the grille ring (6). The inertia ring (7) includes a circular ring (701) and a plurality of equally spaced counterweight balls (702) fixedly connected to the circular ring (701). The circular ring (701) penetrates through the grille plate (602) and is slidably connected to the grille plate (602). The counterweight balls (702) are located in the outer filter holes (603) between adjacent grille plates (602). A scraper (8) is arranged on the inner wall of one side of the grille plate (602) facing the middle cylinder (4). One side of the scraper (8) away from the middle cylinder (4) is fixedly connected to a spring piece (9), and the spring piece (9) is fixedly connected to the inner wall of the grille plate (602).

6. The automatic sampler for oil detection according to claim 2, wherein, A first sliding column (21) is fixedly connected to the inner side of the upper end of the clamping frame (20). A first guiding groove (23) cooperating with the first sliding column (21) is formed on the circumferential outer wall of the groove cylinder (22). A clamping slot for clamping the upper end of the first piston (19) is formed at the lower end of the clamping frame (20).

7. The automatic sampler for oil detection according to claim 6, wherein, The first guiding groove (23) is an annular wave groove formed on the outer wall of the groove cylinder (22), and the number of wave crests of the annular wave groove is equal to the number of syringes (16).

8. An automatic sampler for oil detection according to claim 6, characterized in that, The first guiding groove (23) includes a closed circular groove (2303) formed in the upper part of the groove cylinder (22) and a notched circular groove (2301) formed in the lower part of the groove cylinder (22). One end of one side of the notched circular groove (2301) is communicated with a spiral groove (2302), and the upper end of the spiral groove (2302) is communicated with the closed circular groove (2303).

9. The automatic sampler for oil detection according to claim 3, wherein, Second guiding grooves (2801) are formed on both the upper and lower end faces of the groove disc (28). The second guiding grooves (2801) include arc grooves (2802) and inner grooves (2803) communicating with the arc grooves (2802). The clamping frame (27) is fixedly connected with a pair of second sliding columns (2701), and the second sliding columns (2701) are slidably connected to the second guiding grooves (2801).

10. The automatic sampler for oil detection according to claim 4, wherein, A flow sensor (30) is fixedly connected in the suction pipe (14). The flow sensor (30) is electrically connected to a controller (31). The controller (31) is fixed in the lower cylinder (5). The first motor (12), the second motor (24), and the third motor (29) are all electrically connected to the controller (31).

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