A sampling device with oil quantity control function for diesel testing

Abstract

The invention discloses a sampling device with an oil quantity control function for diesel detection, which relates to the technical field of diesel detection, and comprises a shell, wherein a stepper motor is fixedly installed inside the shell, an output end of the stepper motor is fixedly connected with an output shaft, the output shaft is connected with a rotating shaft through a bevel gear transmission, a turntable is fixedly sleeved on the top of the rotating shaft, a convex head is fixedly connected with the upper surface of the turntable, a moving frame is slidably connected with the outer wall of the convex head, the other end of the moving frame is fixedly connected with a piston rod, the other end of the piston rod is fixedly connected with a piston, and a sampling tube is fixedly installed on the inner wall of the shell. In the present invention, the gas volume in the airbag is the same as the sampling volume in the receiving bottle, and the sampling volume can be controlled by controlling the expansion degree of the airbag.

Description

Technical Field

[0001] The invention relates to the technical field of diesel detection, in particular to a sampling device for diesel detection with the function of controlling oil quantity. Background Art

[0002] Diesel is a light petroleum product, a complex hydrocarbon mixture, and is the fuel for diesel engines. Diesel is mainly made from diesel fractions produced by crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, petroleum coking, etc. It can also be produced by shale oil processing and coal liquefaction. It is divided into two categories: light diesel and heavy diesel, and is widely used in large vehicles, railway locomotives, and ships. The oil product testing center has two main evaluation indicators to judge the quality of diesel: distillation range and octane number. The distillation range reflects the volatility of gasoline, and the octane number reflects the anti-knock performance. In addition, the following items need to be tested: mercaptan, sulfur content, actual colloid, copper sheet corrosion, water-soluble acid or alkali, mechanical impurities and moisture, aromatic hydrocarbon content, olefin content, and metal ions such as manganese, lead, and iron. The instruments involved include: octane number tester, plasma emission spectrometer, atomic absorption spectrometer, liquid chromatograph, gas chromatograph, automatic trace sulfur / chlorine analyzer, infrared spectrometer.

[0003] Before diesel testing, it is necessary to sample the diesel. The Chinese patent document with publication number CN202020203746.3 discloses a rapid sampling device for adulterated diesel, which records "comprising a sampling tube, one end of the sampling tube is an open end, and the other end is a closed end, and the open end of the sampling tube is screwed with a connecting cover, one end of the connecting cover is connected and fixed with a straw, and the other end of the straw is connected and fixed with a suction head, the closed end of the sampling tube is screwed and fixed with a screw-on sealing cover, a sealing block is provided inside the sampling tube, a branch tube is provided at the top of the sampling tube close to the closed end, a rubber tube is connected and fixed to the branch tube, a cut-off clamp is provided in the middle of the rubber tube, and a negative pressure tube is connected and fixed to the other end of the rubber tube, and the negative pressure tube is connected and fixed to the negative pressure pump in the negative pressure box". The utility model facilitates diesel sampling, and the sampling tube can be easily disassembled after sampling, and the diesel in the sampling tube can be easily sealed.

[0004] However, the above device combined with the prior art still has the following defects or problems: first, the diesel sampling device has a simple structure and a single function, and requires manual operation to draw the sample into the sampling chamber; second, the gasoline sampling device cannot ensure that the sample amount is the same each time, and does not have the function of controlling the oil amount. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sampling device for diesel detection with the function of controlling the oil quantity.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A sampling device for diesel detection with an oil quantity control function comprises a shell, a stepper motor is fixedly installed inside the shell, an output end of the stepper motor is fixedly connected to an output shaft, the output shaft is connected to a rotating shaft through a bevel gear transmission, a turntable is fixedly sleeved on the top of the rotating shaft, a convex head is fixedly connected to the upper surface of the turntable, a moving frame is slidably connected to the outer wall of the convex head, a piston rod is fixedly connected to the other end of the moving frame, a piston is fixedly connected to the other end of the piston rod, a sampling cylinder is fixedly installed on the inner wall of the shell, the piston is slidably connected to the inner wall of the sampling cylinder, an oil suction pipe is fixedly connected to the left input end of the sampling cylinder, an oil discharge pipe is fixedly connected to the left output end of the sampling cylinder, an air intake pipe is fixedly connected to the right input end of the sampling cylinder, and an exhaust pipe is fixedly connected to the right output end of the sampling cylinder;

[0008] A support frame is fixedly installed inside the shell, a movable rod is slidably connected to the side wall of the support frame, a spring 1 is sleeved on the outer wall of the movable rod, a clamping plate is fixedly connected to the other end of the movable rod, the spring 1 is in contact with the clamping plate, an air bag is arranged on the inner side of the clamping plate, the output end of the exhaust pipe 1 is fixedly connected to the input end of the air bag, the output end of the air bag is fixedly connected to the exhaust pipe 2, a contact is fixedly installed on the outer wall of the clamping plate, an adjusting rod is slidably connected to the outer wall of the support frame, and a contact switch is fixedly installed on the end of the adjusting rod close to the contact;

[0009] A conveyor is provided at the bottom of the shell, and a storage bottle is placed on the upper surface of the conveyor. A box is fixedly installed on the outer wall of the conveyor. A rotating rod is rotatably connected to the inner wall of the box. The top of the rotating rod is fixedly connected to a limiting rod. The inner wall of the box is fixedly connected to a limiting shell, and the limiting shell and the rotating rod are sleeved with each other.

[0010] Preferably, a partition is fixedly connected to the top inner wall of the shell, the stepper motor is located above the partition, and the bottom end of the rotating shaft is rotatably connected to the outer wall of the partition.

[0011] Preferably, both ends of the movable frame are slidably connected to a sliding rod 1, and both ends of the sliding rod 1 are fixedly connected to the inner wall of the outer shell.

[0012] Preferably, the other end of the oil drain pipe extends to the top of the receiving bottle, the outer walls of the air inlet pipe, exhaust pipe 1, oil suction pipe and oil drain pipe are all fixedly installed with a one-way valve, and the outer wall of the exhaust pipe 2 is fixedly installed with a solenoid valve.

[0013] Preferably, the contact switch and the contactor correspond to each other, and a fixing screw is fixedly mounted on the side wall of the support frame, and the other end of the fixing screw is in contact with the outer wall of the adjusting rod.

[0014] Preferably, there are four limit rods, which are equidistantly arranged along the outer wall of the rotating rod, and the limit rods are located above the conveyor.

[0015] Preferably, a protective shell is fixedly installed on the inner wall of the limiting shell, an electromagnet is fixedly installed on the inner wall of the protective shell, a slide rod 2 is fixedly installed on the inner wall of the protective shell, a movable plate is slidably connected to the outer wall of the slide rod 2, a magnetic block is fixedly installed on one side of the movable plate close to the electromagnet, and a clamping rod is fixedly connected to the other side of the movable plate.

[0016] Preferably, the other end of the clamping rod passes through and extends to the outside of the protective shell, the outer wall of the rotating rod is fixedly sleeved with a limit plate, the limit plate is located inside the limit shell, the outer wall of the limit plate is provided with a clamping slot, there are four clamping slots, and the four clamping slots are equidistantly arranged along the outer wall of the limit plate, and the clamping rod and the clamping slots match each other.

[0017] Preferably, the electromagnet and the magnetic block correspond to each other, the corresponding surface magnetic poles of the electromagnet and the magnetic block are opposite, the contact is electrically connected to the electromagnet, and the protective shell is made of a hard material and has no magnetic conductivity.

[0018] Preferably, a spring 2 is sleeved on the outer wall of the sliding rod 2, and the spring 2 is located on one side of the clamping rod. One end of the spring 2 is fixedly connected to the inner wall of the protective shell, and the other end of the spring 2 is fixedly connected to the outer wall of the movable plate.

[0019] The beneficial effects of the present invention are:

[0020] 1. In the present invention, the output shaft drives the rotating shaft to rotate through the bevel gear, the rotating shaft drives the convex head to move through the turntable, the convex head drives the piston rod to move through the moving frame, the piston rod drives the piston to move, when the piston moves to the right, the oil in the oil tank is sucked into the sampling cylinder through the oil suction pipe, when the piston moves to the left, the oil in the sampling cylinder is discharged through the oil discharge pipe, and the discharged oil is input into the receiving bottle through the oil discharge pipe, thereby completing the sampling, which is more efficient than traditional manual sampling.

[0021] 2. In the present invention, when the piston moves to the left, the outside gas enters the sampling cylinder through the air inlet pipe, and when the piston moves to the right, the gas in the sampling cylinder is discharged into the airbag through the exhaust pipe. The gas in the airbag increases, the airbag expands and squeezes the splint to move, and the splint drives the contact to move outward, and the contact contacts with the contact switch. At this time, the stepper motor stops working and the electromagnet is energized at the same time. The electromagnet and the magnetic block attract each other, and the magnetic block drives the clamping rod to move through the moving plate, and the clamping rod is separated from the limit plate, thereby releasing the restriction on the limit plate. At this time, the rotating rod can rotate freely, and the receiving bottle placed on the conveyor moves, and the receiving bottle pushes the limit rod to move. At this time, a sampling is completed, and the receiving bottle after sampling can be automatically moved out of the device. At the same time, the gas capacity in the airbag is the same as the sampling amount in the receiving bottle, and the sampling capacity can be controlled by controlling the expansion degree of the airbag.

[0022] 3. In the present invention, under the action of the conveyor, the next receiving bottle is moved to the top of the oil drain pipe, and at the same time, the solenoid valve on the outer wall of the exhaust pipe 2 is opened, and the gas in the airbag is discharged through the exhaust pipe 2. Under the action of spring 1, the airbag contracts, the contact switch is separated from the contact, and the electromagnet is powered off. Under the action of spring 2, the clamping rod moves to one side of the limit plate. When the clamping rod is inserted into the clamping slot, the rotating rod is restricted and cannot rotate. The limiting rod blocks the receiving bottle on the conveyor to prevent the receiving bottle located at the oil drain pipe from moving, and then continues to sample, thereby achieving stable extraction of diesel in the oil tank, and the amount extracted each time is fixed, which can ensure that the amount of sample collected in each receiving bottle is the same.

[0023] 4. In the present invention, the fastening screws on the side of the support frame are loosened, and the position of the contact switch is adjusted by the adjusting rod, so that the amount of gas collected in the airbag can be adjusted, and the amount of sample collected in the receiving bottle can be adjusted, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic structural diagram of a sampling device for diesel detection with the function of controlling the oil quantity.

[0025] Figure 2 The present invention is a schematic structural diagram of a sampling tube of a sampling device for diesel detection with an oil quantity control function.

[0026] Figure 3 The present invention is a schematic structural diagram of a rotating disk, a convex head and a moving frame of a sampling device with an oil quantity control function for diesel detection.

[0027] Figure 4 The present invention is a schematic structural diagram of a support frame of a sampling device for diesel testing with an oil quantity control function.

[0028] Figure 5The present invention is a diesel oil detection sampling device with oil quantity control function Figure 4 Schematic diagram of the local structure at point A.

[0029] Figure 6 The present invention is a diesel oil detection sampling device with oil quantity control function Figure 4 Schematic diagram of the local structure at point B.

[0030] Figure 7 The present invention is a schematic structural diagram of a support frame and an airbag of a sampling device for diesel detection with an oil quantity control function; the airbag is in an expanded state at this time.

[0031] Figure 8 The present invention is a schematic structural diagram of a box body, a limit shell and a rotating rod of a sampling device with an oil quantity control function for diesel detection.

[0032] Fig. 9 The present invention is a schematic structural diagram of a limit housing and a limit plate of a sampling device for diesel detection with an oil quantity control function.

[0033] Fig.10 The present invention is a diesel oil detection sampling device with oil quantity control function Fig. 9 Schematic diagram of the local structure of output C.

[0034] Fig.11 The present invention is a top view of a rotating rod and a limiting rod of a sampling device for diesel detection with an oil quantity control function.

[0035] Numbers in the figure: 1. shell; 2. partition; 3. sampling tube; 4. support frame; 5. conveyor; 6. stepper motor; 7. output shaft; 8. rotating shaft; 9. turntable; 10. convex head; 11. moving frame; 12. sliding rod one; 13. piston rod; 14. piston; 15. air inlet pipe; 16. exhaust pipe one; 17. oil suction pipe; 18. oil discharge pipe; 19. receiving bottle; 20. air bag; 21. movable rod; 22. spring one; 23. adjusting rod; 24. contact switch; 25. splint; 26. contact; 27. box; 28. limit shell; 29. ​​rotating rod; 30. limit rod; 31. limit disk; 32. card slot; 33. protective shell; 34. electromagnet; 35. moving plate; 36. card rod; 37. magnetic block; 38. sliding rod two; 39. spring two; 40. exhaust pipe two. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example:

[0038] As attached Figure 1 To Attachment Fig.11 As shown:

[0039] A sampling device for diesel detection with an oil quantity control function comprises a shell 1, a stepper motor 6 is fixedly installed inside the shell 1, an output end of the stepper motor 6 is fixedly connected to an output shaft 7, the output shaft 7 is connected to a rotating shaft 8 through a bevel gear transmission, a turntable 9 is fixedly sleeved on the top of the rotating shaft 8, a convex head 10 is fixedly connected to the upper surface of the turntable 9, a moving frame 11 is slidably connected to the outer wall of the convex head 10, a piston rod 13 is fixedly connected to the other end of the moving frame 11, a piston 14 is fixedly connected to the other end of the piston rod 13, a sampling barrel 3 is fixedly installed on the inner wall of the shell 1, the piston 14 is slidably connected to the inner wall of the sampling barrel 3, an oil suction pipe 17 is fixedly connected to the left input end of the sampling barrel 3, an oil discharge pipe 18 is fixedly connected to the left output end of the sampling barrel 3, an air intake pipe 15 is fixedly connected to the right input end of the sampling barrel 3, and an exhaust pipe 16 is fixedly connected to the right output end of the sampling barrel 3;

[0040] A support frame 4 is fixedly installed inside the housing 1, and a movable rod 21 is slidably connected to the side wall of the support frame 4. A spring 22 is sleeved on the outer wall of the movable rod 21, and a clamping plate 25 is fixedly connected to the other end of the movable rod 21. The spring 22 contacts the clamping plate 25, and an airbag 20 is arranged on the inner side of the clamping plate 25. The output end of the exhaust pipe 16 is fixedly connected to the input end of the airbag 20, and the output end of the airbag 20 is fixedly connected to the exhaust pipe 240. A contact 26 is fixedly installed on the outer wall of the clamping plate 25, and an adjustment rod 23 is slidably connected to the outer wall of the support frame 4. A contact switch 24 is fixedly installed on one end of the adjustment rod 23 close to the contact 26;

[0041] A conveyor 5 is provided at the bottom of the outer shell 1, and a receiving bottle 19 is placed on the upper surface of the conveyor 5. A box body 27 is fixedly installed on the outer wall of the conveyor 5. A rotating rod 29 is rotatably connected to the inner wall of the box body 27. The top of the rotating rod 29 is fixedly connected to a limiting rod 30. The inner wall of the box body 27 is fixedly connected to a limiting shell 28, and the limiting shell 28 and the rotating rod 29 are mutually sleeved.

[0042] in:

[0043] a. The top inner wall of the housing 1 is fixedly connected with a partition 2, the stepper motor 6 is located above the partition 2, and the bottom end of the rotating shaft 8 is rotatably connected to the outer wall of the partition 2.

[0044] b. Both ends of the moving frame 11 are slidably connected to a slide bar 12 , and both ends of the slide bar 12 are fixedly connected to the inner wall of the outer shell 1 .

[0045] c. The other end of the oil drain pipe 18 extends to the top of the receiving bottle 19. The outer walls of the air inlet pipe 15, the exhaust pipe 16, the oil suction pipe 17 and the oil drain pipe 18 are all fixedly installed with a one-way valve, and the outer wall of the exhaust pipe 2 40 is fixedly installed with a solenoid valve.

[0046] d. The contact switch 24 and the contact 26 correspond to each other. A fixing screw is fixedly installed on the side wall of the support frame 4, and the other end of the fixing screw is in contact with the outer wall of the adjustment rod 23.

[0047] e. There are four limit rods 30 , which are arranged equidistantly along the outer wall of the rotating rod 29 , and the limit rods 30 are located above the conveyor 5 .

[0048] in:

[0049] f. A protective shell 33 is fixedly installed on the inner wall of the limiting shell 28, an electromagnet 34 is fixedly installed on the inner wall of the protective shell 33, a second slide bar 38 is fixedly installed on the inner wall of the protective shell 33, a movable plate 35 is slidably connected to the outer wall of the second slide bar 38, a magnetic block 37 is fixedly installed on one side of the movable plate 35 close to the electromagnet 34, and a clamping rod 36 is fixedly connected to the other side of the movable plate 35.

[0050] g. The other end of the clamping rod 36 passes through and extends to the outside of the protective shell 33. The outer wall of the rotating rod 29 is fixedly sleeved with the limit plate 31. The limit plate 31 is located inside the limit shell 28. The outer wall of the limit plate 31 is provided with a clamping slot 32. There are four clamping slots 32. The four clamping slots 32 are equidistantly arranged along the outer wall of the limit plate 31. The clamping rod 36 and the clamping slots 32 match each other.

[0051] h. The electromagnet 34 and the magnetic block 37 correspond to each other, and the corresponding surfaces of the electromagnet 34 and the magnetic block 37 have opposite magnetic poles. The contact 26 is electrically connected to the electromagnet 34, and the protective shell 33 is made of hard material and has no magnetic conductivity.

[0052] i. A spring 2 39 is sleeved on the outer wall of the sliding rod 38 . The spring 2 39 is located on one side of the clamping rod 36 . One end of the spring 2 39 is fixedly connected to the inner wall of the protective shell 33 , and the other end of the spring 2 39 is fixedly connected to the outer wall of the movable plate 35 .

[0053] The specific usage and function of this embodiment are as follows:

[0054] When the present invention is used, the input end of the oil suction pipe 17 is connected to the oil pipe extending into the oil tank, the stepper motor 6 is started, the stepper motor 6 drives the output shaft 7 to rotate, the output shaft 7 drives the rotating shaft 8 to rotate through the bevel gear, the rotating shaft 8 drives the convex head 10 to move through the turntable 9, the convex head 10 drives the piston rod 13 to move through the moving frame 11, the piston rod 13 drives the piston 14 to move, when the piston 14 moves to the right, the oil in the oil tank is sucked into the sampling tube 3 through the oil suction pipe 17, when the piston 14 moves to the left, the oil in the sampling tube 3 is discharged through the oil discharge pipe 18, and the discharged oil is input into the receiving bottle 19 through the oil discharge pipe 18, thereby completing the sampling;

[0055] At the same time, when the piston 14 moves to the left, the external gas enters the sampling tube 3 through the intake pipe 15. When the piston 14 moves to the right, the gas in the sampling tube 3 is discharged into the airbag 20 through the exhaust pipe 16. The gas in the airbag 20 increases, the airbag 20 expands and squeezes the clamping plate 25 to move, and the clamping plate 25 drives the contact 26 to move outward. The contact 26 contacts the contact switch 24. At this time, the stepper motor 6 stops working, and the electromagnet 34 is energized. The electromagnet 34 and the magnetic block 37 attract each other. The magnetic block 37 The moving plate 35 drives the clamping rod 36 to move, and the clamping rod 36 is separated from the limiting plate 31, and the restriction on the limiting plate 31 is released. At this time, the rotating rod 29 can rotate freely, and the receiving bottle 19 placed on the conveyor 5 moves. The receiving bottle 19 pushes the limiting rod 30 to move. At this time, a sampling is completed, and the receiving bottle 19 after sampling can be automatically moved out of the device. At the same time, the gas volume in the airbag 20 is the same as the sampling volume in the receiving bottle 19. The sampling volume can be controlled by controlling the expansion degree of the airbag 20;

[0056] At the same time, under the action of the conveyor 5, the next receiving bottle 19 is moved to the top of the oil drain pipe 18, and the solenoid valve on the outer wall of the exhaust pipe 2 40 is opened, and the gas in the airbag 20 is discharged through the exhaust pipe 2 40. Under the action of the spring 1 22, the airbag 20 contracts, the contact switch 24 is separated from the contact 26, and the electromagnet 34 is powered off. Under the action of the spring 2 39, the clamping rod 36 moves to one side of the limit plate 31. When the clamping rod 36 is inserted into the clamping groove 32, the rotating rod 29 is restricted and cannot rotate. The limiting rod 30 blocks the receiving bottle 19 on the conveyor 5 to prevent the receiving bottle 19 located at the oil drain pipe 18 from moving, and then continues to sample, thereby achieving stable extraction of diesel in the oil tank, and the amount extracted each time is fixed, which can ensure that the amount of sample collected in each receiving bottle 19 is the same;

[0057] Loosen the fastening screws on the side of the support frame 4, adjust the position of the contact switch 24 through the adjustment rod 23, so as to adjust the amount of gas collected in the airbag 20, and then adjust the amount of sample collected in the storage bottle 19, thereby improving the practicality of the device.

[0058] For the above structure and process, please refer to Figure 1-11 .

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sampling device for diesel detection with a function of controlling the amount of oil, comprising a housing (1), characterized in that: A stepper motor (6) is fixedly installed inside the housing (1); an output end of the stepper motor (6) is fixedly connected to an output shaft (7); the output shaft (7) is connected to a rotating shaft (8) via a bevel gear transmission; a rotating disk (9) is fixedly sleeved on the top of the rotating shaft (8); a convex head (10) is fixedly connected to the upper surface of the rotating disk (9); a moving frame (11) is slidably connected to the outer wall of the convex head (10); a piston rod (13) is fixedly connected to the other end of the moving frame (11); the piston rod (13) is fixedly connected to the piston rod (13) and the piston rod (13) is fixedly connected to the outer wall of the moving frame (11); and the piston rod (13) is fixedly connected to the outer wall of the moving frame (11). The other end of the outer shell (13) is fixedly connected to a piston (14), a sampling cylinder (3) is fixedly mounted on the inner wall of the outer shell (1), the piston (14) is slidably connected to the inner wall of the sampling cylinder (3), the left input end of the sampling cylinder (3) is fixedly connected to an oil suction pipe (17), the left output end of the sampling cylinder (3) is fixedly connected to an oil discharge pipe (18), the right input end of the sampling cylinder (3) is fixedly connected to an air intake pipe (15), and the right output end of the sampling cylinder (3) is fixedly connected to an exhaust pipe (16); A support frame (4) is fixedly installed inside the housing (1), a side wall of the support frame (4) is slidably connected to a movable rod (21), an outer wall of the movable rod (21) is sleeved with a spring 1 (22), the other end of the movable rod (21) is fixedly connected to a clamping plate (25), the spring 1 (22) is in contact with the clamping plate (25), an air bag (20) is arranged on the inner side of the clamping plate (25), the output end of the exhaust pipe 1 (16) is fixedly connected to the input end of the air bag (20), the output end of the air bag (20) is fixedly connected to the exhaust pipe 2 (40), a contact (26) is fixedly installed on the outer wall of the clamping plate (25), an adjustment rod (23) is slidably connected to the outer wall of the support frame (4), and a contact switch (24) is fixedly installed on one end of the adjustment rod (23) close to the contact (26); A conveyor (5) is arranged at the bottom of the housing (1), a receiving bottle (19) is placed on the upper surface of the conveyor (5), a box (27) is fixedly mounted on the outer wall of the conveyor (5), a rotating rod (29) is rotatably connected to the inner wall of the box (27), a limit rod (30) is fixedly connected to the top of the rotating rod (29), a limit shell (28) is fixedly connected to the inner wall of the box (27), and the limit shell (28) and the rotating rod (29) are sleeved with each other; A protective shell (33) is fixedly mounted on the inner wall of the limit shell (28), an electromagnet (34) is fixedly mounted on the inner wall of the protective shell (33), a second slide bar (38) is fixedly mounted on the inner wall of the protective shell (33), a movable plate (35) is slidably connected to the outer wall of the second slide bar (38), a magnetic block (37) is fixedly mounted on one side of the movable plate (35) close to the electromagnet (34), and a clamping rod (36) is fixedly connected to the other side of the movable plate (35); The other end of the clamping rod (36) penetrates through and extends to the outside of the protective shell (33); the outer wall of the rotating rod (29) is fixedly sleeved with a limit plate (31); the limit plate (31) is located inside the limit shell (28); the outer wall of the limit plate (31) is provided with a clamping groove (32); there are four clamping grooves (32); the four clamping grooves (32) are arranged equidistantly along the outer wall of the limit plate (31); the clamping rod (36) and the clamping groove (32) match each other; The electromagnet (34) and the magnetic block (37) correspond to each other, the corresponding surfaces of the electromagnet (34) and the magnetic block (37) have opposite magnetic poles, the contact (26) is electrically connected to the electromagnet (34), and the protective shell (33) is made of a hard material and has no magnetic conductivity; The outer wall of the second sliding rod (38) is sleeved with a second spring (39), the second spring (39) is located on one side of the clamping rod (36), one end of the second spring (39) is fixedly connected to the inner wall of the protective shell (33), and the other end of the second spring (39) is fixedly connected to the outer wall of the movable plate (35).

2. A diesel oil sampling device with oil quantity control function for diesel detection according to claim 1, characterized in that: A partition (2) is fixedly connected to the top inner wall of the housing (1), the stepping motor (6) is located above the partition (2), and the bottom end of the rotating shaft (8) is rotatably connected to the outer wall of the partition (2).

3. A diesel sampling device with oil quantity control function for diesel detection according to claim 1, characterized in that: Both ends of the movable frame (11) are slidably connected to a sliding rod (12), and both ends of the sliding rod (12) are fixedly connected to the inner wall of the outer shell (1).

4. A sampling device for diesel detection with oil quantity control function according to claim 1, characterized in that: The other end of the oil drain pipe (18) extends to the top of the receiving bottle (19); the outer walls of the air inlet pipe (15), the first exhaust pipe (16), the oil suction pipe (17), and the oil drain pipe (18) are all fixedly mounted with a one-way valve; the outer wall of the second exhaust pipe (40) is fixedly mounted with a solenoid valve.

5. A sampling device for diesel detection with oil quantity control function according to claim 1, characterized in that: The contact switch (24) and the contact (26) correspond to each other, and a fixing screw is fixedly mounted on the side wall of the support frame (4), and the other end of the fixing screw is in contact with the outer wall of the adjustment rod (23).

6. A diesel oil sampling device with oil quantity control function for diesel detection according to claim 1, characterized in that: There are four limit rods (30), and the four limit rods (30) are arranged at equal distances along the outer wall of the rotating rod (29). The limit rods (30) are located above the conveyor (5).

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