Automatic sampler for petroleum testing

Abstract

The present invention relates to an automatic sampler for petroleum detection in the field of detection. When sampling petroleum in an oil storage tank, the sampled liquid is filtered in two stages by a grid ring and a filter cartridge, and the rotating grid ring is used to centrifugally squeeze impurity particles, thereby reducing the probability of impurity particles accumulating on the surface of the grid ring. At the same time, the grid plate and scraper on the grid ring are used to rotate and scrape the surface of the filter cartridge, thereby reducing the probability of impurity particles clogging the inner filter holes, thereby overcoming the problem that the filter screen of a traditional sampling device is easily clogged, resulting in low sampling efficiency or even sampling failure. In addition, the inertia ring is used to inertially squeeze impurity particles entering the outer filter holes of the grid ring, thereby further reducing the probability of the outer filter holes of the grid ring being clogged. In addition, the second piston arranged in the filter cartridge and the extrusion rod adapted to the inner filter holes are used to backwash and squeeze the inner filter holes, thereby further reducing the probability of the inner filter holes being clogged.

Description

Technical Field

[0001] The invention relates to a sampler, in particular to an automatic sampler for petroleum detection applied in the detection field. Background Art

[0002] The oil extracted from underground needs to be stored in oil storage tanks. When testing oil products, a detection sampler is needed to take samples. During sampling, since the oil also contains many impurity particles, impure liquids and sticky oil clumps, these impurity particles and sticky clumps can easily clog the sampling port of the sampler. Generally, a filter is set at the sampling port of the sampler to intercept particulate impurities and sticky clumps. Although the filter of the general sampler can intercept impurities, it is easily clogged by impurities, making sampling difficult.

[0003] The existing patent with announcement number CN108387404B discloses a petroleum detection sampler, including a cylinder, a first feed port, a feed mechanism, a sampler, a fixing mechanism, a second feed port, a cleaning mechanism, a lifting mechanism, a connecting mechanism, a first limiting mechanism, an outer shell and a second limiting mechanism. The bottom end of the cylinder is a conical structure, which facilitates the cylinder to enter the interior of the petroleum. Multiple samplers are arranged inside the cylinder. When the cylinder enters the interior of the petroleum, petroleum samples at different levels inside the storage tank enter the interiors of the multiple samplers respectively, making it convenient for people to take out samples from different positions inside the storage tank; multiple feeding mechanisms are installed on the side walls of the cylinder. When the cylinder enters the interior of the petroleum and is fixed, the feeding mechanism is opened, and the petroleum can enter the interior of the sampler, preventing different levels of petroleum from mixing and entering the interior of the sampler, thereby ensuring the accuracy of the petroleum sample.

[0004] The above-mentioned prior art discloses a plurality of samplers and feeding mechanisms to achieve sampling at different depths, but does not solve the problem that impurity particles and sticky lumps in the petroleum easily clog the filter screen, causing sampling difficulties. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the filter screen of the existing detection sampler is easily clogged by impurities, making sampling difficult.

[0006] To solve the above problems, the present invention provides an automatic sampler for petroleum detection, comprising a sampling cylinder and a sampling rod fixedly connected to the upper end thereof, the sampling cylinder comprising a middle cylinder and an upper cylinder and a lower cylinder fixedly connected to both ends of the middle cylinder; the outer end of the middle cylinder is rotatably connected to a grid ring, the inner end of the middle cylinder is fixedly connected to a filter cylinder abutting against the inner wall of the grid ring, and the filter cylinder is provided with evenly distributed inner filter holes on the side facing the grid ring; the outer end of the filter cylinder is fixedly connected to a suction tube extending into the upper cylinder, the upper end of the suction tube is fixedly connected to an insert cylinder, a syringe is inserted into the insert cylinder, and a locking bolt that movably penetrates the insert cylinder is threadedly connected to the side wall of the syringe; a first piston is slidably connected to 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;

[0007] The grille ring includes a pair of rectangular rings and a plurality of grille plates fixed between the pair of rectangular rings and distributed equidistantly around the circumference. An outer filter hole that cooperates with the inner filter hole is formed between adjacent grille plates. When the outer filter hole rotates to the position of the filter cylinder, the liquid flows into the inner filter hole after passing through the outer filter hole. The lower end of the grille ring is fixedly connected to a gear ring rotatably connected to the middle cylinder. The lower end of the gear ring is engaged with a drive gear extending into the lower cylinder. The drive gear is fixedly connected to the output shaft of the first motor, and the first motor is fixedly connected to the lower end surface of the middle cylinder.

[0008] In the above-mentioned automatic sampler for petroleum detection, the rotating grid mesh and the filter cartridge are provided, thereby reducing the probability of filter mesh clogging and improving the sampling quality.

[0009] As a further improvement of the present application, the number of filter cartridges is multiple and equidistantly distributed around the circumference, the number of syringes is the same as the number of filter cartridges, the first power mechanism includes a clamping frame movably clamped to the first piston, the side end of the clamping frame is slidingly connected to the inner wall of the upper cylinder, the upper end of the clamping frame is rotatably connected to a grooved cylinder, and when the grooved cylinder rotates, it drives the clamping frame to move upward, the grooved cylinder is rotatably connected to the inner wall of the upper cylinder, the output shaft of the second motor is fixedly connected to the inner side of the grooved cylinder, and the second motor is fixedly connected to the inner wall of the upper cylinder.

[0010] 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 to the outside of the filter cylinder, the clamping frame is rotatably connected to a groove plate, the groove plate is fixedly connected to the output shaft of the third motor, the third motor is arranged in the lower cylinder and fixedly connected to the lower end surface of the middle cylinder; a one-way valve is installed in the suction pipe.

[0011] As a further improvement of the present application, the inner filter hole includes a cylindrical hole close to the side of the grille ring and a conical hole connected to the cylindrical hole, and the conical hole is close to the side of the second piston; an extrusion rod is inserted into the cylindrical hole, and the end of the extrusion rod away from the inner filter hole is fixedly connected to the second piston.

[0012] As a further improvement of the present application, the grille ring is slidably connected to an inertia ring, which includes a circular ring and a plurality of equidistantly distributed counterweight balls fixedly connected to the circular ring. The circular ring passes through the grille plate and is slidably connected to 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 the grille plate facing the middle cylinder, and a spring sheet is fixedly connected to the side of the scraper away from the middle cylinder. The spring sheet is fixedly connected to the inner wall of the grille plate, and the spring sheet enables the scraper to elastically abut against the circumferential side wall of the first annular groove.

[0013] 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 guide groove cooperating with the first sliding column is opened on the circumferential outer wall of the groove cylinder, and a clamping slot is opened at the lower end of the clamping frame for clamping the upper end of the first piston.

[0014] As a further improvement of the present application, the first guide groove is an annular wave groove provided on the outer wall of the groove barrel, and the number of wave peaks of the annular wave groove is equal to the number of syringes.

[0015] As a further improvement of the present application, the first guide groove includes a closed circular groove opened on the upper part of the groove drum and a notched circular groove opened on the lower part of the groove drum. One side end of the notched circular groove is connected to a spiral groove, and the upper end of the spiral groove is connected to the closed circular groove.

[0016] As a further improvement of the present application, a second guide groove is provided on the upper and lower end surfaces of the groove plate. The second guide groove includes an arc groove and an inner groove connected to the arc groove. The clamping frame is fixedly connected to a pair of second sliding columns, and the second sliding columns are slidably connected to the second guide groove.

[0017] As a further improvement of the present application, a flow sensor is fixedly connected to the suction tube, the flow sensor is electrically connected to the controller, the controller is fixed in the lower tube, and the first motor, the second motor and the third motor are all electrically connected to the controller.

[0018] To sum up, the present invention performs two-stage filtration on the sampled liquid through the grid ring and the filter cartridge, and uses the rotating grid ring to centrifugally squeeze the impurity particles, thereby reducing the probability of impurity particles accumulating on the surface of the grid ring, facilitating the smooth extraction of the sampled liquid. At the same time, the grid plate and scraper on the grid ring are used to rotate and scrape the surface of the filter cartridge, thereby reducing the probability of impurity particles clogging the inner filter holes, overcoming the problem that the filter screen of the traditional sampling device is easily clogged, resulting in low sampling efficiency or even sampling failure; in addition, through the inertia ring slidably connected to the grid ring, the impurity particles entering the outer filter holes of the grid ring are inertially squeezed, further reducing the probability of clogging of the outer filter holes of the grid ring; in addition, through the second piston arranged in the filter cartridge and the extrusion rod adapted to the inner filter hole, the inner filter hole is backwashed and squeezed to clean, further reducing the probability of clogging of the inner filter hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0020] Figure 2 It is a three-dimensional schematic diagram of the sampling tube;

[0021] Figure 3 This is the transverse cross-sectional structure of the present application;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 This is a schematic diagram of the assembly structure of the grille ring and the middle cylinder in this application;

[0024] Figure 6 This is a schematic diagram of the assembly structure of the syringe and the middle barrel in this application;

[0025] Figure 7 This is a schematic diagram of the syringe extracting liquid;

[0026] Figure 8 for Figure 3 Schematic diagram of the structure at B in the middle;

[0027] Figure 9 This is a schematic diagram of the assembly structure of the filter cartridge and the middle cartridge in this application;

[0028] Figure 10 It is a schematic diagram of the state of the slotted disc rotating in one direction;

[0029] Figure 11 Schematic diagram of the reciprocating rotation of the groove plate.

[0030] Description of the numbers in the figure:

[0031] 1. Sampling tube; 2. Sampling rod; 3. Upper tube; 301. Side cover; 4. Middle tube; 401. First annular groove; 402. Second annular groove; 403. Hollow groove; 404. Mounting hole; 405. Central cavity; 5. Lower tube; 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 plate; 10. Gear ring; 11. Drive gear; 12. First motor; 13. Filter tube; 1301. Inner filter hole; 1302. Columnar hole; 1303. Conical hole; 14. Suction tube; 15. Plug-in cylinder; 16. Syringe; 17. Locking bolt; 18. One-way valve; 19. First piston; 20. Snap-on frame; 21. First sliding column; 22. Grooved 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. Snap-on frame; 2701. Second sliding column; 28. Grooved plate; 2801. Second guide groove; 2802. Arc groove; 2803. Inner groove; 29. ​​Third motor; 30. Flow sensor; 31. Controller. DETAILED DESCRIPTION

[0032] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] Figure 1-7 The invention discloses an automatic sampler for petroleum detection, comprising a sampling tube 1 and a sampling rod 2 fixedly connected to the upper end thereof, the sampling tube 1 comprising a middle tube 4 and an upper tube 3 and a lower tube 5 fixedly connected to the two ends of the middle tube 4; the outer end of the middle tube 4 is rotatably connected to a grid ring 6, the inner end of the middle tube 4 is fixedly connected to a filter tube 13 abutting against the inner wall of the grid ring 6, and the filter tube 13 is provided with evenly distributed inner filter holes 1301 on the side facing the grid ring 6; the outer end of the filter tube 13 is fixedly connected to a suction tube 14 extending into the upper tube 3, the upper end of the suction tube 14 is fixedly connected to a plug-in tube 15, the plug-in tube 15 is plugged with a syringe 16, the side wall of the syringe 16 is threadedly connected to a locking bolt 17 that movably penetrates the plug-in tube 15; a first piston 19 is slidably connected to the syringe 16, and the first piston 19 is connected to a first power mechanism that drives it to move along the axial direction of the syringe 16;

[0035] See also Figure 4 and Figure 5The 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 distributed equidistantly around the circumference. An outer filter hole 603 that cooperates with 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. The lower end of the grille ring 6 is fixedly connected to a gear ring 10 that is rotatably connected to the middle cylinder 4. The lower end of the gear ring 10 is engaged with a drive gear 11 that extends into the lower cylinder 5. The drive gear 11 is fixedly connected to the output shaft of the first motor 12, and the first motor 12 is fixedly connected to the lower end surface of the middle cylinder 4.

[0036] For details, please refer to Figure 7 , when sampling, including the following steps:

[0037] Step 1: Place the sampling tube 1 into the oil layer at a specified depth in the oil storage tank through the sampling rod 2;

[0038] 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 cartridge 13 through the plug-in cylinder 15 and the suction tube 14. Negative pressure is generated in the filter cartridge 13, causing the filter cartridge 13 to suck the liquid in the oil storage tank through the inner filter hole 1301. At the same time, the first motor 12 drives the gear ring 10 to rotate through the drive gear 11. The gear ring 10 drives the grille ring 6 to rotate, and the grille ring 6 rotates to clean the surface of the filter cartridge 13.

[0039] Specifically, the liquid to be sampled enters the filter cartridge 13 through the outer filter hole 603 and the inner filter hole 1301, and is then injected into the syringe 16 through the suction tube 14 and the plug-in cylinder 15; the rotating grid ring 6 centrifugally squeezes the impurity particles accumulated on the outer surface of the grid ring 6, reducing the probability of impurity particles accumulating and clogging the inner filter hole 1301;

[0040] Step three, after the sampling is completed, turn off the first power mechanism and the first motor 12, then take out and open the sampling tube 1, tighten the locking bolt 17, and then take out the syringe 16 to complete the liquid sampling operation.

[0041] Specifically, the side wall of the upper tube 3 is fixedly connected to the side cover 301 by means of bolts, so as to facilitate taking and placing the syringe 16 .

[0042] Compared with traditional liquid sampling devices, when sampling oil in an oil storage tank, the present invention performs two-stage filtration on the sampled liquid through the grid ring 6 and the filter cartridge 13, and utilizes the centrifugal force generated by the rotation of the grid ring 6 to reduce the probability of foreign particles accumulating on the surface of the grid ring 6, thereby improving the sampling efficiency; at the same time, the grid plate 602 provided by the grid ring 6 filters and cleans the surface of the filter cartridge 13, further reducing the probability of foreign particles clogging the inner filter holes 1301, thereby overcoming the problem of sampling failure or low sampling efficiency caused by easy clogging of the filter screen of the traditional sampling device; in addition, the rotating grid ring 6 centrifugally stirs the oil near the sampling cartridge 1, thereby improving the fluidity of the oil near the sampling cartridge 1 and improving the sampling efficiency.

[0043] See also 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 grille ring 6 is opened on its side wall. A second annular groove 402 for accommodating the gear ring 10 is opened on the inner wall of the first annular groove 401. The middle cylinder 4 is provided with a hollow groove 403 below the second annular groove 402 and connected to the second annular groove 402. The driving gear 11 passes through the hollow groove 403 and is meshed with the gear ring 10.

[0044] Specifically, the transmission between the driving gear 11 and the gear ring 10 is achieved by providing the hollow groove 403 .

[0045] See also Figure 5 A mounting hole 404 for accommodating the filter cartridge 13 is provided on the circumferential side wall of the first annular groove 401. The filter cartridge 13 is threadedly connected to the inner wall of the mounting hole 404. A central cavity 405 communicating with the mounting hole 404 is provided at the center of the middle cylinder 4. The outer end surface of the filter cartridge 13 extends to the circumferential side wall of the first annular groove 401.

[0046] Specifically, it is convenient to disassemble and replace the filter cartridge 13.

[0047] See also Figure 1 and 5 The grille ring 6 is slidably connected to the inertia ring 7, which includes a circular ring 701 and a plurality of equidistantly distributed counterweight balls 702 fixedly connected to the circular ring 701. The circular ring 701 passes 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.

[0048] Specifically, when the grille ring 6 rotates, the counterweight ball 702 is squeezed by the grille plate 602, and the inertia ring 7 rotates with the grille ring 6. Since the outer wall of the counterweight ball 702 is a spherical surface, it is not easy for impurity particles to enter the outer filter hole 603. At the same time, after the impurity particles enter the outer filter hole 603, the counterweight ball 702 squeezes the impurity particles. Moreover, since impurity particles continuously enter and are discharged from 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 rotates back and forth along the grille ring 6, squeezing the impurity particles that enter the outer filter hole 603, thereby reducing the probability of impurity particles being blocked in the outer filter hole 603.

[0049] See also Figure 4 A scraper 8 is provided on the inner wall of the grille plate 602 facing the middle cylinder 4. A spring sheet 9 is fixedly connected to the side of the scraper 8 away from the middle cylinder 4. The spring sheet 9 is fixedly connected to the inner wall of the grille plate 602. The spring sheet 9 enables the scraper 8 to elastically abut against the circumferential side wall of the first annular groove 401.

[0050] Specifically, when the scraper 8 rotates with the grille ring 6 , the scraper 8 is pressed against the outer wall of the filter cartridge 13 under the elastic action of the spring sheet 9 , thereby improving the cleaning effect of the filter holes 1301 on the surface of the filter cartridge 13 .

[0051] See also Figure 6 and Figure 7 The number of filter cartridges 13 is multiple and equidistantly distributed around the circumference. The number of syringes 16 is the same as the number of filter cartridges 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 slidingly connected to the inner wall of the upper cylinder 3. The upper end of the clamping frame 20 is rotatably connected to the grooved cylinder 22. When the grooved cylinder 22 rotates, it drives the clamping frame 20 to move upward. The grooved cylinder 22 is rotatably connected to the inner wall of the upper cylinder 3. The output shaft of the second motor 24 is fixedly connected to the inner side of the grooved cylinder 22, and the second motor 24 is fixedly connected to the inner wall of the upper cylinder 3.

[0052] Specifically, the clamping frame 20 is driven to move upward by the grooved cylinder 22 , and the clamping frame 20 drives the first piston 19 to move axially along the syringe 16 , thereby achieving negative pressure extraction of the syringe 16 .

[0053] See also 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, and a first guide groove 23 that cooperates with the first sliding column 21 is opened on the outer wall of the groove cylinder 22. When the groove cylinder 22 rotates, the first guide groove 23 squeezes the first sliding column 21, thereby driving the clamping frame 20 to move upward. A clamping slot is opened at the lower end of the clamping frame 20 for clamping the upper end of the first piston 19.

[0054] In this embodiment, the structure of the first guide groove 23 has two configuration modes, respectively having different effects. Those skilled in the art can selectively implement them as needed, as follows:

[0055] First, the first guide groove 23 is an annular wave groove formed on the outer wall of the groove barrel 22 , and the number of wave peaks in the annular wave groove is equal to the number of the injectors 16 .

[0056] Specifically, when the groove drum 22 rotates, the first sliding column 21 moves from the valley position of the annular wave groove to the peak position, so that multiple syringes 16 can take samples at the same time, and multiple water samples can be sampled at the same sampling depth. It should be noted that the annular wave groove is not shown in the figure. The annular wave groove opened on the outer wall of the groove drum 22 is the existing technology and will not be repeated in this application. When the first piston 19 is at the lowest point, the first sliding column 21 is at the valley position of the annular wave groove.

[0057] Second, please refer to Figure 6 The first guide groove 23 includes a closed circular groove 2303 opened at the upper part of the groove drum 22 and a notched circular groove 2301 opened at the lower part of the groove drum 22. One side end of the notched circular groove 2301 is connected to the spiral groove 2302, and the upper end of the spiral groove 2302 is connected to the closed circular groove 2303.

[0058] Specifically, when the groove drum 22 rotates, the first sliding columns 21 first slide one by one in the notched circular groove 2303, and then move 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 move to the closed circular groove 2301, thereby realizing the one-by-one extraction of the syringe 16. It should be noted that a Hall sensor for monitoring the rotation angle of its output shaft is installed in the second motor 24, thereby realizing multiple sampling at different depths in one operation, thereby improving the overall sampling efficiency.

[0059] Second implementation method:

[0060] Figure 8-11 An automatic sampler for petroleum testing is shown. Based on the first embodiment, a second piston 25 is slidably connected to the filter cartridge 13. The second piston 25 is fixedly connected to a clamping frame 27 extending to the outside of the filter cartridge 13. The clamping frame 27 is rotatably connected to a groove plate 28. The rotating groove plate 28 drives the clamping frame 27 to move back and forth in the filter cartridge 13. The groove plate 28 is fixedly connected to the output shaft of a third motor 29. The third motor 29 is arranged in the lower cartridge 5 and fixedly connected to the lower end surface of the middle cartridge 4; a one-way valve 18 is installed in the suction pipe 14. The one-way valve 18 allows liquid to flow only from the suction pipe 14 into the plug-in cartridge 15.

[0061] For details, please refer to Figure 11The third motor 29 drives the groove plate 28 to rotate, and the groove plate 28 drives the second piston 25 to move back and forth in the filter cartridge 13 through the clamping frame 27, so that the filter cartridge 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 use the inhaled liquid to backwash the inner filter hole 1301 to clean the clogged particles in the inner filter hole 1301; it should be noted that when the third motor 29 drives the groove plate 28 to rotate back and forth, the groove plate 28 drives the second piston 25 to move back and forth horizontally in the filter cartridge 13 through the clamping frame 27.

[0062] See also Figure 9 The upper and lower end surfaces of the groove plate 28 are both provided with a second guide groove 2801, the second guide groove 2801 includes an arc groove 2802 and an inner groove 2803 connected to the arc groove 2802, and 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 guide groove 2801.

[0063] Specifically, when the second sliding column 2701 passes through the inner groove 2803 , it drives the clamping frame 27 to move back and forth.

[0064] See also Figure 8 The inner filter hole 1301 includes a cylindrical hole 1302 close to the side of the grille ring 6 and a tapered hole 1303 connected to the cylindrical hole 1302, and the tapered hole 1303 is close to the side of the second piston 25; an extrusion rod 26 is inserted into the cylindrical hole 1302, and the end of the extrusion rod 26 away from the inner filter hole 1301 is fixedly connected to the second piston 25.

[0065] Specifically, the inner filter hole 1301 of the filter cartridge 13 is blocked by the extrusion rod 26, and at the same time, the inner filter hole 1301 is dredged by the extrusion rod 26, thereby further improving the dredging effect of the inner filter hole 1301; by providing a tapered hole 1303, the squeezing effect of the backwash liquid is increased, thereby improving the flushing 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 are sampled at one time, the inner groove 2803 of the slot plate 28 rotates to the relative position of the corresponding filter cartridge 13, and the reciprocating rotation of the slot plate 28 drives the corresponding second piston 25 to move back and forth in the filter cartridge 13, thereby realizing the squeezing, dredging and backwashing of the inner filter hole 1301 of the corresponding filter cartridge 13.

[0066] See also Figure 3 and Figure 8 A flow sensor 30 is fixedly connected to the suction pipe 14 , and the flow sensor 30 is electrically connected to a controller 31 . The controller 31 is fixed in the lower tube 5 , and the first motor 12 , the second motor 24 and the third motor 29 are all electrically connected to the controller 31 .

[0067] Specifically, the flow rate of the suction tube 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 to make the second piston 25 move back and forth in the filter cylinder 13, thereby improving the targeted cleaning operation. It should be noted that, during the sampling process at different depths, the positions of the groove drum 22 and the groove plate 28 are monitored by the Hall sensors in the second motor 24 and the third motor 29. When sampling, the extrusion rod 26 is separated from the columnar hole 1302. When unblocking is required, the second piston 25 drives the extrusion rod 26 to move back and forth, thereby achieving precise control.

[0068] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An automatic sampler for petroleum detection, characterized in that: The invention comprises a sampling cylinder (1) and a sampling rod (2) fixedly connected to the upper end thereof, wherein the sampling cylinder (1) comprises a middle cylinder (4) and an upper cylinder (3) and a lower cylinder (5) fixedly connected to both ends of the middle cylinder (4); the outer end of the middle cylinder (4) is rotatably connected to a grid ring (6), the inner end of the middle cylinder (4) is fixedly connected to a filter cylinder (13) abutting against the inner wall of the grid ring (6), and the filter cylinder (13) is provided with evenly distributed inner filter holes (1301) on the side facing the grid ring (6); the filter cylinder (1 3) The outer end is fixedly connected to a suction tube (14) extending into the upper tube (3); the upper end of the suction tube (14) is fixedly connected to a plug tube (15); the plug tube (15) is plugged with a syringe (16); the side wall of the syringe (16) is threadedly connected to a locking bolt (17) that movably penetrates the plug tube (15); a first piston (19) is slidably connected to the syringe (16), and the first piston (19) is connected to a first power mechanism that drives it to move along the axial direction of the syringe (16); The grid ring (6) comprises a pair of rectangular rings (601) and a plurality of grid plates (602) fixed between the pair of rectangular rings (601) and distributed equidistantly around the circumference. An outer filter hole (603) cooperating with the inner filter hole (1301) is formed between adjacent grid 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). The lower end of the grid ring (6) is fixedly connected to a gear ring (10) rotatably connected to the middle cylinder (4). The lower end of the gear ring (10) is engaged with a drive gear (11) extending into the lower cylinder (5). The drive gear (11) is fixedly connected to the output shaft of the first motor (12). The first motor (12) is fixedly connected to the lower end surface of the middle cylinder (4). The grille ring (6) is slidably connected to an inertia ring (7), the inertia ring (7) comprising a circular ring (701) and a plurality of equally spaced counterweight balls (702) fixedly connected to the circular ring (701), the circular ring (701) passing through the grille plate (602) and being slidably connected to the grille plate (602), the counterweight balls (702) being located in outer filter holes (603) between adjacent grille plates (602), a scraper (8) being provided on the inner wall of the grille plate (602) facing the middle cylinder (4), a spring sheet (9) being fixedly connected to the side of the scraper (8) away from the middle cylinder (4), the spring sheet (9) being fixedly connected to the inner wall of the grille plate (602).

2. The automatic sampler for petroleum detection according to claim 1, characterized in that: The number of the filter cylinders (13) is multiple and equidistantly distributed around the circumference. The number of the syringes (16) is the same as the number of the filter cylinders (13). The first power mechanism includes a clamping frame (20) movably clamped to 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 inner side of the groove cylinder (22) is fixedly connected to the output shaft of the second motor (24). 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), and the second piston (25) is fixedly connected to a clamping frame (27) extending to the outside of the filter cylinder (13). The clamping frame (27) is rotatably connected to a groove plate (28), and the groove plate (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 surface of the middle cylinder (4); a one-way valve (18) is installed in the suction pipe (14).

4. The automatic sampler for petroleum detection according to claim 3, characterized in that: The inner filter hole (1301) comprises a columnar hole (1302) close to one side of the grid ring (6) and a tapered hole (1303) in communication with the columnar hole (1302), wherein the tapered hole (1303) is close to one side of the second piston (25); an extrusion rod (26) is inserted into the columnar hole (1302), and the end of the extrusion rod (26) away from the inner filter hole (1301) is fixedly connected to the second piston (25).

5. The automatic sampler for petroleum detection according to claim 2, characterized in that: A first sliding column (21) is fixedly connected to the inner side of the upper end of the clamping frame (20), a first guide groove (23) cooperating with the first sliding column (21) is provided on the circumferential outer wall of the groove cylinder (22), and a clamping slot for clamping the upper end of the first piston (19) is provided at the lower end of the clamping frame (20).

6. The automatic sampler for petroleum detection according to claim 5, characterized in that: The first guide groove (23) is an annular wave groove formed on the outer wall of the groove barrel (22), and the number of wave peaks in the annular wave groove is equal to the number of injectors (16).

7. The automatic sampler for petroleum detection according to claim 5, characterized in that: The first guide groove (23) comprises a closed circular groove (2303) provided on the upper portion of the groove drum (22) and a notched circular groove (2301) provided on the lower portion of the groove drum (22); one end portion of the notched circular groove (2301) is connected to a spiral groove (2302); and the upper end of the spiral groove (2302) is connected to the closed circular groove (2303).

8. The automatic sampler for petroleum detection according to claim 3, characterized in that: The upper and lower end surfaces of the groove plate (28) are both provided with second guide grooves (2801), the second guide grooves (2801) comprising a circular arc groove (2802) and an inner groove (2803) communicating with the circular arc groove (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 guide grooves (2801).

9. The automatic sampler for petroleum detection according to claim 4, characterized in that: A flow sensor (30) is fixedly connected to the suction pipe (14), and the flow sensor (30) is electrically connected to a controller (31). The controller (31) is fixed in the lower cylinder (5), and 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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