Automatic sampling device for oil product detection

Abstract

The invention discloses an automatic sampling device for oil product detection. The automatic sampling device comprises a rack, a lowering mechanism and a sampling mechanism, the lowering mechanism comprises a vertical rod, an adjusting sleeve, an adjusting mechanism, a shear fork type telescopic frame, a lower guide mechanism, a mounting plate, a fixed shaft, a fixed gear, a rotating frame and a push rod; and the sampling mechanism comprises a sampler and two winding mechanisms. By arranging the scissor-fork type telescopic frame, the scissor-fork type telescopic frame can enter the tank opening by keeping a short length in the contraction state, and the scissor-fork type telescopic frame is prevented from making contact with oil in the oil tank; after the scissor-fork type telescopic frame enters the oil tank, the adjusting sleeve and the push rod push the rotating frame and the scissor-fork type telescopic frame to rotate, so that the scissor-fork type telescopic frame gradually stretches out, the lower guiding mechanism and the sampler can be driven to move to the position away from the position under a tank opening and close to the inner wall of the oil tank, and the sampler can sample different transverse positions of the oil tank conveniently; and the real quality condition of the oil product in the oil tank can be comprehensively and accurately reflected.

Description

Technical Field

[0001] This invention relates to the field of oil testing technology, and in particular to an automatic sampling device for oil testing. Background Technology

[0002] Petroleum products, also known as oil products, are produced through refining and other processing techniques to create various petroleum products such as gasoline, kerosene, diesel, and lubricating oil. Most petroleum products are stored in tanks. Because petroleum products are stored statically in tanks for extended periods, many of their physicochemical properties may change. Therefore, it is necessary to sample and analyze the petroleum products in the tanks to measure their performance and quality. During sampling, a stratified sampling method is generally used: oil samples are collected from the upper, middle, and lower parts of the tank to obtain samples at different heights, making the samples more representative and the test results more accurate.

[0003] Patent CN105092310B discloses an oil tank sampling device and sampling method. It controls the sampler cylinder and the piston in the sampler by using winches with different diameters set coaxially, so that the sampler cylinder and the piston in the sampler can move relative to each other. This allows for the average sampling of all depth positions in the oil tank without having to calculate the depth position of each sampling point.

[0004] The above-mentioned sampling device inserts the sampler cylinder into the top opening of the oil tank to take samples. It can only sample the oil directly below the opening. Since the opening at the top of the oil tank is usually small, and the size of the opening is much smaller than the overall size of the oil tank, the above-mentioned sampling device cannot take samples at different horizontal positions of the oil tank, such as near the tank wall. For some large oil tanks, it cannot fully and accurately reflect the true quality of the oil inside the tank. Summary of the Invention

[0005] Therefore, it is necessary to provide an automatic sampling device for oil testing to address the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides an automatic sampling device for oil testing, comprising a frame, a lowering mechanism, and a sampling mechanism; The lowering mechanism includes a vertical rod, an adjusting sleeve, an adjusting mechanism, a scissor-type telescopic frame, and a lower guide mechanism. The upper end of the vertical rod is fixedly connected to the frame, and the adjusting sleeve is slidably mounted on the vertical rod. A mounting plate is fixed to the lower end of the vertical rod, and a fixed shaft is fixed on the mounting plate. A fixed gear is fixed on the fixed shaft, and a rotating frame is rotatably mounted on the fixed shaft. A push rod is hinged to the rotating frame, and the end of the push rod away from the rotating frame is hinged to the adjusting sleeve. The adjusting mechanism is connected to the adjusting sleeve and drives the adjusting sleeve to move axially relative to the vertical rod. The scissor-type telescopic frame includes a front connecting arm, a rear connecting arm, and a mechanism located between the front connecting arm and the rear connecting arm. The system consists of several intermediate scissor arms connected sequentially. Two front connecting arms and two rear connecting arms are each configured. Two front connecting shafts are rotatably mounted on the rotating frame, each corresponding to a front connecting arm. Each front connecting arm is fixedly mounted on its corresponding front connecting shaft. A front adjusting gear is also fixed to the front connecting shaft, and the two front adjusting gears mesh with each other. One of the front connecting shafts has a movable gear that meshes with the fixed gear. The lower guide mechanism includes a lower guide frame and two sets of lower guide wheels, both rotatably mounted on the lower guide frame. Both rear connecting arms are rotatably connected to the lower guide frame. The sampling mechanism includes a sampler and two winding mechanisms. The sampler includes a cylinder and a piston. The bottom of the cylinder has an inlet and an outlet. A one-way valve is installed on the inlet, and a drain valve is installed on the outlet. The piston is slidably sealed inside the cylinder, and the top of the cylinder has an opening. The winding mechanism includes a winding reel and a rope. The winding reel is rotatably mounted on the frame, and one end of the rope is connected to the winding reel. The free end of the rope of one winding mechanism passes over a set of lower guide wheels and is connected to the cylinder. The free end of the rope of the other winding mechanism passes over another set of lower guide wheels and is connected to the piston.

[0007] Preferably, the adjusting mechanism includes a rack, an adjusting shaft, a first gear, a first worm gear, a first worm, and a first handle. The rack is fixedly mounted on the adjusting sleeve, the adjusting shaft and the first worm are rotatably mounted on the frame, the first worm gear and the first gear are fixedly mounted on the adjusting shaft, the first worm is meshed with the first worm gear, and the first handle is fixedly mounted on the first worm.

[0008] Preferably, the winding mechanism includes a winding shaft, a second worm gear, a second worm, and a second handle. The winding shaft and the second worm are both rotatably mounted on the frame. The second worm gear and the winding reel are fixedly mounted on the winding shaft. The second worm is meshed with the second worm gear. The second handle is fixedly mounted on the second worm.

[0009] Preferably, the sampling mechanism further includes a synchronous switching mechanism, which includes a lead screw, a connecting plate, a spline sleeve, a spline shaft, a first bevel gear, a second bevel gear, and a third handle. Two spline shafts, two first bevel gears, and two second bevel gears are provided. The lead screw and the spline shaft are rotatably mounted on the frame. The third handle is fixedly mounted on the lead screw. Two first bevel gears are mounted on each of the two second worm gears, and two second bevel gears are mounted on each of the two spline shafts. The first bevel gears and second bevel gears correspond one-to-one, and the first bevel gears mesh with their corresponding second bevel gears. A connecting plate is threaded onto the lead screw, and the connecting plate is rotatably connected to the spline sleeve. The spline sleeve can selectively connect to one or both spline shafts.

[0010] Preferably, a set of lower guide wheels consists of two contacting lower guide wheels. The outer edge of the lower guide wheel is provided with an annular groove. The two lower guide wheels together form a lower limit space that restricts the passage of the tether rope. The two lower limit spaces correspond one-to-one with the two tether ropes, and the tether rope passes through the corresponding lower limit space.

[0011] Preferably, the lowering mechanism further includes an upper guiding mechanism, which includes an upper guiding frame and two sets of upper guiding wheels. Both sets of upper guiding wheels are rotatably mounted on the upper guiding frame. Each set of upper guiding wheels consists of two contacting and cooperating upper guiding wheels. An annular groove is provided on the outer edge of the upper guiding wheel. The two upper guiding wheels together form an upper limit space that restricts the passage of the tethering rope. The two upper limit spaces correspond one-to-one with the two tethering ropes, and the tethering rope passes through the corresponding upper limit space.

[0012] Preferably, two tail-end connecting shafts are rotatably mounted on the lower guide frame, with each tail-end connecting shaft corresponding to a tail-end connecting arm. The tail-end connecting arm is fixedly mounted on its corresponding tail-end connecting shaft, and a tail-end adjusting gear is also fixed on the tail-end connecting shaft. The two tail-end adjusting gears are meshed together.

[0013] Preferably, the top of the frame is fixed with lifting lugs.

[0014] Preferably, the sampler further includes a load sleeve, which is fixedly fitted onto the lower part of the cylinder.

[0015] Preferably, a limiting block is fixed on the vertical rod, and the limiting block is used to abut against the bottom end of the adjusting sleeve.

[0016] Compared with existing technologies, this technical solution has at least one of the following beneficial effects: By setting up a scissor-type telescopic frame, the scissor-type telescopic frame can maintain a shorter length when retracted, avoiding contact with the oil inside the tank. After the scissor-type telescopic frame enters the tank, the adjusting mechanism drives the adjusting sleeve to move. The adjusting sleeve pushes the rotating frame and the scissor-type telescopic frame to rotate through the push rod. During the rotation, the scissor-type telescopic frame gradually extends, which can drive the lower guiding mechanism and the sampler to a position away from directly below the tank opening and close to the inner wall of the tank. This facilitates the sampler to take samples from different lateral positions of the tank, which can comprehensively and accurately reflect the true quality of the oil inside the tank. By setting up a sampler and two winding mechanisms, and connecting the piston and cylinder with two ropes respectively, oil samples can be sampled at multiple different height positions at once, improving sampling efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention; Figure 2 for Figure 1 A sectional view along line AA. Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 for Figure 1 A magnified view of a section at point C; Figure 5 This is a schematic diagram of the sampler's structure; Figure 6 This is a partial side view of the sampling mechanism; Figure 7 This is the working state of an embodiment of the present invention. Figure 1 (The scissor lift is entering the tank opening.) Figure 8 This is the working state of an embodiment of the present invention. Figure 2 (The scissor lift is in the retracted state inside the oil tank.) Figure 9 This is the working state of an embodiment of the present invention. Figure 3 (The scissor lift is in the deployed state). Figure 10 for Figure 9 A sectional view along the DD line; Figure 11 for Figure 9 Sectional view along the EE line; In the diagram, 1. Frame; 2. Vertical rod; 3. Movable gear; 4. Adjusting mechanism; 5. Scissor-type telescopic frame; 6. Lower guide mechanism; 7. Adjusting sleeve; 8. Mounting plate; 9. Fixed shaft; 10. Fixed gear; 11. Rotating frame; 12. Push rod; 13. Heading end connecting arm; 14. Tail end connecting arm; 15. Intermediate scissor arm; 16. Heading end connecting shaft; 17. Heading end adjusting gear; 18. Lower guide frame; 19. Lower guide wheel; 20. Sampler; 21. Rewinding mechanism; 22. Cylinder; 23. Piston; 24. Liquid inlet; 25. Liquid outlet; 26. One-way valve; 27. Drain valve; 28. Rewinding reel; 29. ​​Tie rope; 30. Gear 31. Adjusting shaft; 32. First gear; 33. First worm gear; 34. First worm; 35. First handle; 36. Rewinding shaft; 37. Second worm gear; 38. Second worm; 39. Second handle; 40. Synchronous switching mechanism; 41. Lead screw; 42. Connecting plate; 43. Spline sleeve; 44. Spline shaft; 45. First bevel gear; 46. Second bevel gear; 47. Third handle; 48. Lower limit space; 49. Upper guide mechanism; 50. Upper guide frame; 51. Upper guide wheel; 52. Upper limit space; 53. Tail end connecting shaft; 54. Tail end adjusting gear; 55. Lifting lug; 56. Load sleeve; 57. Limit block. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Please see Figures 1 to 11 This application provides an automatic sampling device for oil testing, including a frame 1, a lowering mechanism, and a sampling mechanism; the frame 1 includes side plates and a top plate, with four side plates and the top plate fixedly connected to the top of the four side plates; the frame 1 can be easily placed around the tank opening; The lowering mechanism includes a vertical rod 2, an adjusting sleeve 7, an adjusting mechanism 4, a scissor-type telescopic frame 5, and a lower guide mechanism 6. The upper end of the vertical rod 2 is fixedly connected to the frame 1. The adjusting sleeve 7 is slidably installed on the vertical rod 2. The lower end of the vertical rod 2 is fixedly fixed to a mounting plate 8. A fixed shaft 9 is fixedly fixed on the mounting plate 8. A fixed gear 10 is fixedly fixed on the fixed shaft 9. A rotating frame 11 is rotatably installed on the fixed shaft 9 through a bearing. A push rod 12 is hinged to the rotating frame 11 through a pin. There are two push rods 12. The end of the push rod 12 away from the rotating frame 11 is hinged to the adjusting sleeve 7. The adjusting mechanism 4 is connected to the adjusting sleeve 7, and the adjusting mechanism 4 drives the adjusting sleeve 7 to move axially relative to the vertical rod 2. The adjusting mechanism 4 includes a rack 30, an adjusting shaft 31, a first gear 32, a first worm gear 33, a first worm 34, and a first handle 35. The rack 30 is fixedly installed on the adjusting sleeve 7. The adjusting shaft 31 and the first worm 34 are rotatably installed on the frame 1 through bearings. The first worm gear 33 and the first gear 32 are fixedly installed on the adjusting shaft 31. The first worm 34 is meshed with the first worm gear 33. The first handle 35 is fixedly installed on the first worm 34. By rotating the first handle 35, the first worm 34 is driven to rotate. The first worm 34 drives the first worm gear 33, the adjusting shaft 31, and the first gear 32 to rotate. The first gear 32 drives the rack 30 to rise and fall, thereby driving the adjusting sleeve 7 to move linearly along its axis on the vertical rod 2. The adjusting sleeve 7 drives the push rod 12 to move, and the push rod 12 pushes the rotating frame 11 to rotate around the fixed shaft 9. Please see Figure 1 , Figures 9 to 11 The scissor-type telescopic frame 5 includes a front connecting arm 13, a rear connecting arm 14, and several intermediate scissor arms 15 connected sequentially between the front connecting arm 13 and the rear connecting arm 14. The front connecting arm 13, intermediate scissor arms 15, and rear connecting arm 14 are connected by hinges in sequence. There are two front connecting arms 13 and two rear connecting arms 14. Two front connecting shafts 16 are rotatably mounted on the rotating frame 11 through bearings. The front connecting shafts 16 correspond one-to-one with the front connecting arms 13. The front connecting arms 13 are fixedly mounted on the corresponding front connecting shafts 16. A front adjusting gear 17 is also fixed on the front connecting shaft 16. The two front adjusting gears 17 are meshed and connected. A movable gear 3 that meshes with a fixed gear 10 is fixed on one of the front connecting shafts 16. Please see Figure 4 , Figure 10 , Figure 11 The lower guide mechanism 6 includes a lower guide frame 18 and two sets of lower guide wheels 19. Both sets of lower guide wheels 19 are rotatably mounted on the lower guide frame 18 via bearings. Both tail end connecting arms 14 are rotatably connected to the lower guide frame 18. Since one of the head-end adjusting gears 17 meshes with the fixed gear 10, and the fixed gear 10 remains fixed, when the push rod 12 pushes the rotating frame 11 and the scissor-type telescopic frame 5 to rotate around the fixed shaft 9, one of the head-end adjusting gears 17 will rotate around the fixed gear 10, thereby driving the other head-end adjusting gear 17 to rotate synchronously in the opposite direction. The number of teeth of the movable gear 3 is slightly greater than the number of teeth of the fixed gear 10, and the ratio of the number of teeth of the movable gear 3 to the fixed gear 10 is 1.1~1.5. In this way, after the rotating frame 11 and the scissor-type telescopic frame 5 rotate 90 degrees, the rotation angle of the head-end connecting shaft 16 will be less than 90 degrees, so that the scissor-type telescopic frame 5 can switch from the retracted state to the extended state, thereby driving the lower guide mechanism 6 away from the position directly below the tank opening and closer to the inner wall of the oil tank; this facilitates sampling at different lateral positions of the oil tank, such as the position close to the oil tank wall, and can comprehensively and accurately reflect the true quality status of the oil in the oil tank; The sampling mechanism includes a sampler 20 and two winding mechanisms 21. Please refer to [link / reference]. Figure 5 The sampler 20 includes a cylinder 22 and a piston 23. The bottom of the cylinder 22 is provided with a liquid inlet 24 and a liquid outlet 25. A one-way valve 26 is installed on the liquid inlet 24 and a liquid outlet 27 is installed on the liquid outlet 25. The liquid outlet 27 is a manual valve. The piston 23 is slidably sealed inside the cylinder 22. The top of the cylinder 22 is provided with an opening. Please see Figure 1 , Figure 2 , Figure 6 The winding mechanism 21 includes a winding reel 28 and a tether 29. The winding reel 28 is rotatably mounted on the frame 1, and one end of the tether 29 is connected to the winding reel 28. The free end of the tether 29 of one winding mechanism 21 passes around a set of lower guide wheels 19 and is connected to the drum 22. The free end of the tether 29 of the other winding mechanism 21 passes around another set of lower guide wheels 19 and then passes through an opening and is connected to the piston 23. The opening allows the tether 29 to pass through.

[0020] By rotating the take-up reel 28, the tie rope 29 is wound or unwound; when both take-up reels 28 rotate synchronously, the two tie ropes 29 are wound and unwound synchronously, driving the cylinder 22 and piston 23 to move synchronously, making it easier to move the sampler 20 to a suitable position; when only the take-up reel 28 corresponding to the piston 23 is rotated, the tie rope 29 pulls the piston 23 upward, so that the inner cavity of the cylinder 22 located below the piston 23 forms a negative pressure, which allows the oil to enter the cylinder 22 through the inlet 24. The one-way valve 26 allows the oil to enter the cylinder 22 in one direction through the inlet 24 and prevents the oil from being discharged from the inlet 24; after the sampler 20 is removed, the drain valve 27 is opened to discharge the oil in the cylinder 22.

[0021] For easier driving of the reel 28, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 6The winding mechanism 21 includes a winding shaft 36, a second worm gear 37, a second worm 38, and a second handle 39. Both the winding shaft 36 and the second worm 38 are rotatably mounted on the frame 1 via bearings. The second worm gear 37 and the winding reel 28 are fixedly mounted on the winding shaft 36. The second worm 38 is meshed with the second worm gear 37. The second handle 39 is fixedly mounted on the second worm 38. By rotating the second handle 39, the second worm 38 is driven to rotate, which in turn drives the second worm gear 37, the winding shaft 36, and the winding reel 28 to rotate.

[0022] To facilitate the synchronous and co-directional rotation of the two take-up reels 28, please refer to [link / reference needed]. Figure 1 , Figure 2 , Figure 6 The sampling mechanism also includes a synchronous switching mechanism 40, which includes a lead screw 41, a connecting plate 42, a spline sleeve 43, a spline shaft 44, a first bevel gear 45, a second bevel gear 46, and a third handle 47. Two spline shafts 44, two first bevel gears 45, and two second bevel gears 46 are provided. The lead screw 41 and the spline shaft 44 are rotatably mounted on the frame 1 via bearings. The third handle 47 is fixedly mounted on the lead screw 41. Two first bevel gears 45 are mounted on the two second worm gears 38, with the two first bevel gears 45 facing opposite directions. Two second bevel gears 46 are mounted on the two spline shafts 44, with each first bevel gear 45 and second bevel gear 46 corresponding to one another. The first bevel gear 45 and its corresponding second bevel gear 46 are meshed together. The connecting plate 42 is threaded onto the lead screw 41, and the connecting plate 42 is rotatably connected to the spline sleeve 43. The spline sleeve 43 can selectively connect to one or both spline shafts 44.

[0023] The gap between the two splined shafts 44 is less than the length of the splined sleeve 43, so the splined sleeve 43 can be fitted onto both splined shafts 44 simultaneously, or onto only one splined shaft 44. By rotating the third handle 47, the lead screw 41 is driven to rotate, and the lead screw 41 drives the splined sleeve 43 to move linearly on the splined shaft 44 through the connecting plate 42, so that the splined sleeve 43 is fitted onto both splined shafts 44 simultaneously, realizing the transmission connection between the two splined shafts 44. Subsequently, by simply rotating one of the second handles 39, through the transmission of the first bevel gear 45, the second bevel gear 46, the splined sleeve 43, and the splined shaft 44, the winding shafts 36 and winding reels 28 of the two winding mechanisms 21 can rotate synchronously in the same direction, thereby synchronously winding and unwinding the two ropes 29, driving the cylinder 22 and piston 23 to move synchronously.

[0024] To prevent the tether 29 from detaching from the lower guide wheel 19, please refer to... Figure 4 , Figure 10 and Figure 11A set of lower guide wheels 19 is provided, consisting of two contacting lower guide wheels 19. The outer edge of each lower guide wheel 19 has an annular groove. The two lower guide wheels 19 together form a lower limiting space 48 that restricts the passage of the tether 29. The two lower limiting spaces 48 correspond one-to-one with the two tether 29s, and the tether 29 passes through its corresponding lower limiting space 48. The tether 29 moves within the lower limiting space 48 formed by the annular grooves of the two lower guide wheels 19 and will not detach from the lower guide wheels 19.

[0025] To prevent the rope 29 from contacting the can opening, please refer to [link / reference needed]. Figure 1 , Figure 2 The lowering mechanism also includes an upper guide mechanism 49, which comprises an upper guide frame 50 and two sets of upper guide wheels 51. Both sets of upper guide wheels 51 are rotatably mounted on the upper guide frame 50 via bearings. To prevent the tether 29 from detaching from the upper guide wheels 51, each set of upper guide wheels 51 consists of two contacting upper guide wheels 51. The outer edge of each upper guide wheel 51 has an annular groove. The two upper guide wheels 51 together form an upper limit space 52 that restricts the passage of the tether 29. Each of the two upper limit spaces 52 corresponds one-to-one with a tether 29, through which the tether 29 passes. The tether 29 moves within the upper limit space 52 formed by the annular grooves of the two upper guide wheels 51 and will not detach from the upper guide wheels 51.

[0026] To improve the stability of the scissor lift 5 during extension and retraction, please refer to [link / reference needed]. Figure 10 , Figure 11 Two tail-end connecting shafts 53 are rotatably mounted on the lower guide frame 18 via bearings. Each tail-end connecting shaft 53 corresponds to a tail-end connecting arm 14, and the tail-end connecting arm 14 is fixedly mounted on its corresponding tail-end connecting shaft 53. Tail-end adjusting gears 54 are also fixed on the tail-end connecting shaft 53, and the two tail-end adjusting gears 54 are meshed together. When the scissor-type telescopic frame 5 extends and retracts, the included angle of the two tail-end connecting arms 14 changes. The meshing of the two tail-end adjusting gears 54 ensures that the rotation angle of the two tail-end connecting arms 14 remains the same.

[0027] To facilitate moving rack 1 to the top of the oil tank, please refer to... Figure 1 The top of the frame 1 is fixed with a lifting lug 55. By connecting the lifting lug 55 with the sling of the crane, the frame 1 can be easily moved to the top of the oil tank, and the lowering mechanism and sampler 20 can be lowered from below the tank opening into the inner cavity of the oil tank.

[0028] To prevent the piston 23 from causing the cylinder 22 to move upwards when it rises, please refer to [link / reference needed]. Figure 5 The sampler 20 also includes a load sleeve 56, which is fixedly fitted onto the lower part of the cylinder 22. The load sleeve 56 is made of a high-density material, such as lead or iron, which increases the overall weight of the sampler 20, so that the cylinder 22 will not move upward when the piston 23 rises.

[0029] To limit the maximum rotation angle of the rotating frame 11, please refer to [link / reference]. Figure 1 A limiting block 57 is fixed on the vertical rod 2, which is used to abut against the bottom end of the adjusting sleeve 7. Initially, the length direction of the high scissor-type telescopic frame 5 is roughly parallel to the vertical rod 2. When the adjusting sleeve 7 moves to abut against the limiting block 57, the high scissor-type telescopic frame 5 rotates approximately 90 degrees, and the length direction of the high scissor-type telescopic frame 5 is roughly perpendicular to the vertical rod 2. At this time, the lower guide mechanism 6 is furthest from the tank opening, which can drive the tether 29 and the sampler 20 to a position close to the inner wall of the oil tank, making it convenient to sample the oil near the inner wall of the oil tank.

[0030] The working principle of this embodiment: S1, as Figure 7 As shown, the frame 1 is moved to the top of the oil tank by crane or manually. With the scissor-type telescopic frame 5 in the retracted state, the sampler 20 and the scissor-type telescopic frame 5 are sequentially placed into the tank opening until the bottom of the frame 1 abuts against the top of the oil tank. Figure 8 As shown; S2, then turn the first handle 35, which drives the adjusting sleeve 7 to descend on the vertical rod 2 via the adjusting mechanism 4. The adjusting sleeve 7 drives the push rod 12 to move, and the adjusting sleeve 7 pushes the rotating frame 11 to rotate around the fixed shaft 9 via the push rod 12. Figure 9 As shown, the maximum rotation angle of the rotating frame 11 is 90 degrees. After the scissor-type telescopic frame 5 rotates 90 degrees, it switches from the retracted state to the extended state, and its length changes from the shortest to the longest. In this way, the scissor-type telescopic frame 5 can maintain a shorter length to enter the tank opening when it is in the retracted state, avoiding contact between the scissor-type telescopic frame 5 and the oil in the tank when it enters the tank opening with a longer length in the extended state. After the scissor-type telescopic frame 5 rotates 90 degrees, it can drive the lower guide mechanism 6 and the sampler 20 to move to a position away from directly below the tank opening and close to the inner wall of the oil tank. This makes it convenient for the sampler 20 to take samples from different lateral positions of the oil tank, such as positions close to the tank wall, so as to comprehensively and accurately reflect the true quality status of the oil in the tank. As the adjusting sleeve 7 pushes the rotating frame 11 to rotate around the fixed shaft 9 via the push rod 12, the length of the scissor-type telescopic frame 5 gradually increases. In order to avoid the rope 29 affecting the extension of the scissor-type telescopic frame 5, it is necessary to rotate one of the second handles 39 to unwind the two ropes 29 simultaneously, provided that the spline sleeve 43 is connected to the two spline shafts 44. If the width of the oil tank is small and the scissor-type telescopic frame 5 cannot extend to its maximum length, the rotation angle of the scissor-type telescopic frame 5 can be made less than 90 degrees. This still allows the sampler 20 to be moved to a position away from directly below the tank opening and close to the inner wall of the oil tank. S3, after the sampler 20 moves to the preset position in the horizontal direction, with the spline sleeve 43 connected to the two spline shafts 44, one of the second handles 39 is rotated again to unwind the two ropes 29 simultaneously, so that the sampler 20 moves to the preset position in the vertical direction. S4, then turn the third handle 47, which drives the connecting plate 42 and spline sleeve 43 to move through the lead screw 41, so that the spline sleeve 43 separates from one of the spline shafts 44; S5, then only the winding reel 28 corresponding to the piston 23 is rotated, and the piston 23 is pulled upward by the rope 29, so that the inner cavity of the cylinder 22 located below the piston 23 forms a negative pressure, and the oil enters the cylinder 22 from the inlet 24. The one-way valve 26 allows the oil to enter the cylinder 22 from the inlet 24 in one direction, and blocks the oil from being discharged from the inlet 24. S6, then turn the third handle 47 again, which drives the connecting plate 42 and spline sleeve 43 to move through the lead screw 41, so that the spline sleeve 43 is connected to the two spline shafts 44 again. S7, rotate one of the second handles 39 again to simultaneously wind up the two ropes 29, so that the sampler 20 moves vertically to the preset position; S8, repeat S4, S5, S6 and S7 until the oil samples from the bottom, middle and top of the tank are completed; S9, rotate the first handle 35, and drive the adjusting sleeve 7 to rise on the vertical rod 2 through the adjusting mechanism 4. The adjusting sleeve 7 pushes the rotating frame 11 to rotate around the fixed shaft 9 through the push rod 12, so that the scissor-type telescopic frame 5 switches from the extended state to the retracted state, and the length becomes the shortest. S10, the frame 1 is lifted by a crane or manually, so that the scissor-type telescopic frame 5 and the sampler 20 are moved out of the tank opening in sequence; S11, open the drain valve 27 to drain the oil from the cylinder 22.

[0031] It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. An automatic sampling device for oil product testing, comprising a frame (1), characterized in that: It also includes the decentralization mechanism and the sampling mechanism; The lowering mechanism comprises a vertical rod (2), an adjusting sleeve (7), an adjusting mechanism (4), a scissor-type telescopic frame (5) and a lower guiding mechanism (6); the upper end of the vertical rod (2) is fixedly connected to the frame (1); the adjusting sleeve (7) is slidably mounted on the vertical rod (2); a mounting plate (8) is fixedly mounted on the lower end of the vertical rod (2); a fixed shaft (9) is fixedly mounted on the mounting plate (8); a fixed gear (10) is fixedly mounted on the fixed shaft (9); a rotating frame (11) is rotatably mounted on the fixed shaft (9); a push rod (12) is hingedly mounted on the rotating frame (11); an end of the push rod (12) away from the rotating frame (11) is hingedly connected to the adjusting sleeve (7); the adjusting mechanism (4) is connected to the adjusting sleeve (7); the adjusting mechanism (4) drives the adjusting sleeve (7) to move axially relative to the vertical rod (2); the scissor-type telescopic frame (5) comprises a head end connecting arm (13), a tail end connecting arm (14) and a connecting arm (15) located between the head end connecting arm (13) and the rotating frame (11); A plurality of intermediate scissor arms (15) are sequentially connected between the tail end connecting arms (14), the head end connecting arms (13) and the tail end connecting arms (14) are each provided with two, two head end connecting shafts (16) are rotatably mounted on the rotating frame (11), the head end connecting shafts (16) correspond to the head end connecting arms (13) one by one, the head end connecting arms (13) are fixedly mounted on the corresponding head end connecting shafts (16), a head end adjusting gear (17) is also fixed on the head end connecting shafts (16), the two head end adjusting gears (17) are meshingly connected, and a movable gear (3) meshingly connected to the fixed gear (10) is fixed on one of the head end connecting shafts (16); the lower guide mechanism (6) comprises a lower guide frame (18) and two sets of lower guide wheels (19), the two sets of lower guide wheels (19) are both rotatably mounted on the lower guide frame (18), and the two tail end connecting arms (14) are both rotatably connected to the lower guide frame (18); The sampling mechanism comprises a sampler (20) and two winding mechanisms (21); the sampler (20) comprises a cylinder (22) and a piston (23); a liquid inlet (24) and a liquid discharge port (25) are provided at the bottom of the cylinder (22); a one-way valve (26) is installed on the liquid inlet (24); a liquid discharge valve (27) is installed on the liquid discharge port (25); the piston (23) is slidably sealed and installed in the cylinder (22); an opening is provided at the top of the cylinder (22); the winding mechanism comprises: The mechanism (21) comprises a winding disk (28) and a tether (29), wherein the winding disk (28) is rotatably mounted on the frame (1), and one end of the tether (29) is connected to the winding disk (28); the free end of the tether (29) of one winding mechanism (21) passes around a set of lower guide wheels (19) and is connected to the cylinder (22), and the free end of the tether (29) of the other winding mechanism (21) passes around another set of lower guide wheels (19) and is connected to the piston (23).

2. The automatic sampling device for oil product detection according to claim 1, characterized in that: The adjustment mechanism (4) comprises a rack (30), an adjustment shaft (31), a first gear (32), a first worm wheel (33), a first worm (34) and a first handle (35); the rack (30) is fixedly mounted on the adjustment sleeve (7); the adjustment shaft (31) and the first worm (34) are both rotatably mounted on the frame (1); the first worm wheel (33) and the first gear (32) are fixedly mounted on the adjustment shaft (31); the first worm (34) is meshingly connected with the first worm wheel (33); and the first handle (35) is fixedly mounted on the first worm (34).

3. The automatic sampling device for oil product detection according to claim 1, characterized in that: The winding mechanism (21) comprises a winding shaft (36), a second worm wheel (37), a second worm (38) and a second handle (39); the winding shaft (36) and the second worm (38) are both rotatably mounted on the frame (1); the second worm wheel (37) and the winding disc (28) are fixedly mounted on the winding shaft (36); the second worm (38) is meshingly connected with the second worm wheel (37); and the second handle (39) is fixedly mounted on the second worm (38).

4. The automatic sampling device for oil product detection according to claim 1, characterized in that: The sampling mechanism further comprises a synchronous switching mechanism (40), the synchronous switching mechanism (40) comprising a screw (41), a connecting plate (42), a spline sleeve (43), a spline shaft (44), a first bevel gear (45), a second bevel gear (46), and a third handle (47), the spline shaft (44), the first bevel gear (45), and the second bevel gear (46) are each provided in pairs, the screw (41) and the spline shaft (44) are both rotatably mounted on the frame (1), the third handle (47) is fixedly mounted on the screw (41), and the two The second worm (38) is provided with a first bevel gear (45), the two spline shafts (44) are provided with a second bevel gear (46), the first bevel gear (45) corresponds to the second bevel gear (46) one by one, the first bevel gear (45) and the corresponding second bevel gear (46) are meshingly connected, a connecting plate (42) is threadedly provided on the screw rod (41), the connecting plate (42) is rotationally connected to the spline sleeve (43), and the spline sleeve (43) is selectively key-connected to one of the spline shafts (44) or both of the spline shafts (44).

5. The automatic sampling device for oil product testing according to claim 1, characterized in that: A set of lower guide wheels (19) is composed of two contacting lower guide wheels (19), an annular groove is provided on the outer edge of the lower guide wheel (19), and the two lower guide wheels (19) together enclose a lower limit space (48) for limiting the passage of the tether (29), the two lower limit spaces (48) correspond to the two tethers (29) one by one, and the tethers (29) pass through the corresponding lower limit spaces (48).

6. The automatic sampling device for oil product testing according to claim 1, characterized in that: The lowering mechanism further comprises an upper guide mechanism (49), the upper guide mechanism (49) comprising an upper guide frame (50) and two groups of upper guide wheels (51), the two groups of upper guide wheels (51) being rotatably mounted on the upper guide frame (50); one group of upper guide wheels (51) comprises two upper guide wheels (51) in contact with each other, an annular groove is provided on the outer edge of the upper guide wheel (51), the two upper guide wheels (51) together enclose an upper limit space (52) for limiting the passage of the tether (29), the two upper limit spaces (52) corresponding to the two tethers (29) one by one, and the tethers (29) pass through the corresponding upper limit spaces (52).

7. The automatic sampling device for oil product testing according to claim 1, characterized in that: Two tail end connecting shafts (53) are rotatably mounted on the lower guide frame (18), the tail end connecting shafts (53) corresponding to the tail end connecting arms (14) one by one, the tail end connecting arms (14) are fixedly mounted on the corresponding tail end connecting shafts (53), and a tail end adjusting gear (54) is also fixed on the tail end connecting shaft (53), and the two tail end adjusting gears (54) are meshed and connected.

8. The automatic sampling device for oil product testing according to claim 1, characterized in that: A lifting lug (55) is fixed to the top of the frame (1).

9. The automatic sampling device for oil product testing according to claim 1, characterized in that: The sampler (20) further comprises a load sleeve (56), wherein the load sleeve (56) is fixedly sleeved on the lower part of the cylinder (22).

10. The automatic sampling device for oil product testing according to claim 1, characterized in that: A limit block (57) is fixed on the vertical rod (2), and the limit block (57) is used to abut against the bottom end of the adjustment sleeve (7).

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