An off-site sampling device for lubricating oil for civil aviation engines

Abstract

The present invention provides an off-site sampling device for lubricating oil for civil aviation engines, and relates to the technical field of sampling devices. The present invention comprises a base support plate, a threaded rod is rotatably inserted into the top of the base support plate, a connecting block is threadedly sleeved on the surface of the threaded rod, a limiting rod is inserted through the top of the connecting block, the limiting rod and the top of the base support plate are fixedly connected, a first connecting ring is provided on one side of the connecting block, a second connecting ring is provided on one side of the first connecting ring, a first bolt is threadedly inserted through one side of the second connecting ring, the first bolt is rotatably inserted into one side of the first connecting ring, when the adjusting device is used, the rotating rod is controlled to rotate inside the connecting groove, and then the first connecting ring can be driven to rotate well, so that the first connecting ring can form a certain angle with the horizontal plane, so that the connecting ring can be sleeved on the surface of the rotating shaft to be sampled, which is convenient for sampling the lubricating oil.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, and in particular to an off-site sampling equipment for lubricating oil used in civil aviation engines. Background Art

[0002] When analyzing the concentration of fuel inside the engine combustion chamber, it is necessary to sample the fuel inside. The fuel in the engine combustion chamber is different from the sampling of fuel inside the pipeline. The fuel inside the pipeline is liquid, and only a sampling tube, a collection bottle, and a valve to control the dredging of the sampling tube are needed for sampling. However, the sampling of fuel in the engine combustion chamber is to take the gaseous fuel inside and analyze the fuel concentration and composition. If the existing fuel sampling device is used to take the fuel in the engine combustion chamber, the fuel gas will condense into liquid on the wall at the lower end of the sampling tube, which is not conducive to the analysis of the fuel concentration.

[0003] The sampling device is a device used to collect lubricating oil used for lubrication on civil aviation engines. When using the sampling device, manually rotate the threaded rod to move the connecting block to the appropriate position, and then manually put the connecting ring on the rotating shaft of the engine that needs lubrication. The lubricating oil on the rotating shaft is sucked into the interior of the sampling tank through the connecting pipe and the bellows by an air pump.

[0004] The inventors have found in their daily work that the sampling device still has at least the following problems: when using the sampling device, the threaded rod is manually rotated to move the connecting block to the appropriate position, and then the connecting ring is manually put on the rotating shaft of the engine that needs lubrication, and the lubricating oil on the rotating shaft is sucked into the interior of the sampling tank through the connecting pipe and the bellows by an air pump. However, in actual use, because the connecting ring is mostly fixed together with the connecting block, it is not possible to put the connecting ring on the surface of the rotating shaft at different angles. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that the connecting ring is mostly fixed together with the connecting block, so that the connecting ring cannot be well mounted on the surface of the rotating shaft at different angles, and to propose an off-site sampling device for lubricating oil for civil aviation engines.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a field sampling device for lubricating oil for civil aviation engines, comprising a base support plate, a threaded rod is rotatably inserted into the top of the base support plate, a connecting block is threadedly sleeved on the surface of the threaded rod, a limiting rod is inserted through the top of the connecting block, the limiting rod and the top of the base support plate are fixedly connected, a first connecting ring is provided on one side of the connecting block, a second connecting ring is provided on one side of the first connecting ring, a first bolt is threadedly inserted through one side of the second connecting ring, the first bolt is rotatably inserted on one side of the first connecting ring, a round long rod is fixedly connected to one side of the first connecting ring, and the round long rod A sliding pipe is inserted into one side of the second connecting ring, a connecting pipe is provided on one side of the connecting block, an air pump is fixedly connected to the middle of the connecting pipe, one end of the connecting pipe is inserted into one side of the first connecting ring, a bellows is fixedly connected to the bottom of the connecting pipe, a sampling tank is provided at the bottom of the bellows, an adjusting device is provided on one side of the connecting block, a limiting device is provided on the top of the base support plate, the adjusting device includes a rotating rod, a connecting groove is provided on one side of the connecting block, the rotating rod is rotatably inserted on one side of the inner wall of the connecting groove, an end of the rotating rod away from the connecting groove is fixedly connected to one side of the first connecting ring, and a first gear is fixedly connected to the surface of the rotating rod.

[0007] The effect achieved by the above-mentioned components is: when using the adjusting device, the rotating rod is controlled to rotate inside the connecting groove, which can then drive the first connecting ring to rotate well, so that the first connecting ring can form a certain angle with the horizontal plane, so that the connecting ring can be placed on the surface of the rotating shaft that needs to be sampled, which facilitates the sampling of the lubricating oil.

[0008] Preferably, a rectangular plate is fixedly connected to one side of the connecting block, a connecting rod is rotatably inserted through one side of the rectangular plate, one end of the connecting rod is fixedly connected to a second gear, the second gear and the first gear are meshed with each other, and the end of the connecting rod away from the second gear is fixedly connected to a rotating cylinder.

[0009] The effects achieved by the above components are: manually controlling the rotating cylinder to rotate, and then driving the second gear to rotate through the connecting rod, because the first gear and the second gear are meshed with each other, and then the rotating rod can be driven to rotate by controlling the rotating cylinder.

[0010] Preferably, one side of the connecting block is fixedly connected to a supporting block, one side of the supporting block is fixedly connected to a damping rod, one end of the damping rod away from the supporting block is fixedly connected to a circular plate, one side of the circular plate away from the damping rod is evenly fixedly connected with a protrusion, a first spring is sleeved on the surface of the damping rod, one end of the first spring is fixedly connected to one side of the supporting block, and one end of the first spring close to the damping rod is fixedly connected to one side of the circular plate.

[0011] The effect achieved by the above components is: when the rotating rod is rotated to a suitable position, the circular plate is pressed in a direction away from the support block by the first spring, so that the evenly fixed protrusion on one side of the circular plate is pressed on one side of the rotating cylinder, and then the connecting rod is well fixed inside the rectangular plate through the rotating cylinder, so that the rotating rod can be well fixed inside the connecting groove.

[0012] Preferably, a locking plate is slidably inserted at the top of the support block, the locking plate is slidably inserted at the top of the circular plate, the bottom of the locking plate is fixedly connected to a second spring, and the bottom of the second spring is fixedly connected to one side of the inner wall of the support block.

[0013] The effect achieved by the above components is: when the rotating rod needs to be rotated, the locking plate is inserted into the top of the circular plate, and then the locking plate is pulled toward the support block through the second spring, thereby limiting one end of the locking plate inside the circular plate, thereby compressing the second spring, and moving the circular plate away from the rotating cylinder, thereby preventing the circular plate from affecting the rotation of the rotating cylinder.

[0014] Preferably, the limiting device includes a fixed tube, which is fixedly connected to the top of the base support plate, and the inner wall of the fixed tube is slidably connected to the sampling tank. A second bolt is threadedly inserted through one side of the fixed tube, and the second bolt is arranged on one side of the sampling tank.

[0015] The effect achieved by the above components is: when using the limiting device, the sampling tank is manually slid into the interior of the fixing tube, and then the second bolt is manually controlled to pass through the fixing tube and squeezed on one side of the sampling tank, thereby effectively limiting the sampling tank on the top of the base support plate.

[0016] Preferably, a fixing hole is opened at the top of the sampling tank, the inner wall of the fixing hole is slidably connected with a connecting tube, the top of the connecting tube and the bottom of the bellows are fixedly connected, the bottom surface of the connecting tube is fixedly connected with a rubber conical tube, and the surface of the connecting tube is fixedly connected with a retaining ring.

[0017] The effect achieved by the above components is: insert the connecting tube into the fixing hole, and then squeeze the rubber conical tube into the sampling tank, and then set the retaining ring on the top of the sampling tank, so that the bottom of the bellows can be well set on the top of the sampling tank.

[0018] Preferably, a cam is rotatably inserted at the top of the sampling tank, one end of the cam is arranged at the top of the fixing hole, and a first rectangular block is evenly fixedly connected to the semicircular side of the cam.

[0019] The effect achieved by the above components is: controlling the rotation of the cam, and then setting the end of the cam with the longest diameter on the top of the retaining ring, so that the retaining ring can be well restricted on the top of the sampling tank.

[0020] Preferably, a locking groove is provided on the top of the sampling tank, a locking block is slidably connected to the inner wall of the locking groove, a rotating ring is fixedly connected to the top of the locking block, the inner wall of the rotating ring is evenly fixedly connected to the second rectangular block, the second rectangular block and the first rectangular block are meshed with each other, and a third bolt is inserted through the top thread of the rotating ring.

[0021] The effect achieved by the above components is: because the first rectangular block and the second rectangular block are meshed with each other, the cam can be driven to rotate on the top of the sampling tank. When the cam rotates to a suitable position, the third bolt is manually controlled to pass through the retaining ring and then squeezed on the top of the sampling tank, thereby effectively limiting the cam to the top of the retaining ring.

[0022] In the present invention, by setting an adjustment device, when using the adjustment device, the rotating rod is controlled to rotate inside the connecting groove, thereby driving the first connecting ring to rotate well, so that the first connecting ring can form a certain angle with the horizontal plane, so that the connecting ring can be placed on the surface of the rotating shaft that needs to be sampled, which facilitates the sampling of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention provides a schematic diagram of the three-dimensional structure of an off-site sampling device for lubricating oil for civil aviation engines;

[0024] Figure 2 The present invention provides a three-dimensional structural schematic diagram of a novel round long rod;

[0025] Figure 3 A three-dimensional structural schematic diagram of a novel connecting rod proposed by the present invention;

[0026] Figure 4 A schematic diagram of the three-dimensional structure of a novel circular plate proposed in the present invention;

[0027] Figure 5 The present invention provides a three-dimensional structural schematic diagram of a novel clamping plate;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of a novel fixing cylinder proposed by the present invention;

[0029] Figure 7 The present invention provides a three-dimensional structural schematic diagram of a novel positioning block;

[0030] Figure 8 The present invention provides a three-dimensional structural schematic diagram of a novel cam.

[0031] Legend: 1. Base support plate; 2. Threaded rod; 3. Limit rod; 4. Connecting block; 5. First connecting ring; 6. Second connecting ring; 7. Adjusting device; 701. Connecting groove; 702. Rotating rod; 703. First gear; 704. Rectangular plate; 705. Second gear; 706. Connecting rod; 707. Rotating cylinder; 708. Support block; 709. Damping rod; 710. First spring; 711. Circular plate; 712. Protrusion; 713. Positioning plate; 714. Two springs; 8. Limiting device; 801. Fixing tube; 802. Second bolt; 803. Fixing hole; 804. Connecting tube; 805. Rubber conical tube; 806. Positioning ring; 807. Positioning groove; 808. Positioning block; 809. Rotating ring; 810. Cam; 811. Third bolt; 812. First rectangular block; 813. Second rectangular block; 9. First bolt; 10. Long round rod; 11. Connecting tube; 12. Bellows; 13. Air pump; 14. Sampling tank. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1, as Figure 1-8As shown, a field sampling device for lubricating oil for civil aviation engines is provided. A threaded rod 2 is rotatably inserted at the top of a base support plate 1. A connecting block 4 is threadedly sleeved on the surface of the threaded rod 2. A limiting rod 3 is inserted through the top of the connecting block 4. The limiting rod 3 is fixedly connected to the top of the base support plate 1. A first connecting ring 5 is provided on one side of the connecting block 4. A second connecting ring 6 is provided on one side of the first connecting ring 5. A first bolt 9 is threadedly inserted through one side of the second connecting ring 6. The first bolt 9 is rotatably inserted at one side of the first connecting ring 5. A round long rod 10 is fixedly connected to one side of the first connecting ring 5. The round long rod 10 is slidably inserted through one side of the second connecting ring 6. A connecting pipe 11 is provided on one side, an air pump 13 is fixedly connected to the middle of the connecting pipe 11, one end of the connecting pipe 11 is inserted through one side of the first connecting ring 5, a bellows 12 is fixedly connected to the bottom of the connecting pipe 11, a sampling tank 14 is provided at the bottom of the bellows 12, an adjusting device 7 is provided on one side of the connecting block 4, and a limiting device 8 is provided on the top of the base support plate 1. When using the sampling equipment, the threaded rod 2 is manually rotated to move the connecting block 4 to a suitable position, and then the connecting ring is manually sleeved on the rotating shaft of the engine that needs to be lubricated, and the lubricating oil on the rotating shaft is sucked into the interior of the sampling tank 14 through the connecting pipe 11 and the bellows 12 by the air pump 13.

[0035] Reference Figure 3 , Figure 4 and Figure 5The adjusting device 7 includes a rotating rod 702, a connecting groove 701 is provided on one side of the connecting block 4, the rotating rod 702 is rotatably inserted on one side of the inner wall of the connecting groove 701, and the end of the rotating rod 702 away from the connecting groove 701 is fixedly connected to one side of the first connecting ring 5, and the surface of the rotating rod 702 is fixedly connected to the first gear 703. When using the adjusting device 7, the rotating rod 702 is controlled to rotate inside the connecting groove 701, so that the first connecting ring 5 can be driven to rotate well, so that the first connecting ring 5 can form a certain angle with the horizontal plane, so that the connecting ring can be set on the surface of the rotating shaft that needs to be sampled, which is convenient for sampling of lubricating oil. A rectangular plate 704 is fixedly connected to one side of the connecting block 4. A connecting rod 706 is inserted and rotated through one side, and one end of the connecting rod 706 is fixedly connected to the second gear 705. The second gear 705 and the first gear 703 are meshed with each other. The end of the connecting rod 706 away from the second gear 705 is fixedly connected to the rotating cylinder 707. The rotating cylinder 707 is manually controlled to rotate, and then the second gear 705 is driven to rotate through the connecting rod 706. Because the first gear 703 and the second gear 705 are meshed with each other, the rotating rod 702 can be driven to rotate by controlling the rotating cylinder 707. A supporting block 708 is fixedly connected to one side of the connecting block 4, and a damping rod 709 is fixedly connected to one side of the supporting block 708. The end of the damping rod 709 away from the supporting block 708 is fixedly connected to a circular plate 711. The circular plate A protrusion 712 is evenly fixedly connected to the side of 711 away from the damping rod 709, and a first spring 710 is sleeved on the surface of the damping rod 709. One end of the first spring 710 is fixedly connected to one side of the support block 708, and the end of the first spring 710 close to the damping rod 709 is fixedly connected to one side of the circular plate 711. When the rotating rod 702 is rotated to a suitable position, the circular plate 711 is pressed away from the support block 708 by the first spring 710, so that the protrusion 712 evenly fixed on one side of the circular plate 711 is pressed against one side of the rotating cylinder 707, and then the connecting rod 706 is well fixed to the inside of the rectangular plate 704 through the rotating cylinder 707. In this way, the rotating rod 702 can be well fixed in the connecting groove 7 The locking plate 713 is slidably inserted into the top of the supporting block 708 inside the body, and the locking plate 713 is slidably inserted into the top of the circular plate 711. The bottom of the locking plate 713 is fixedly connected with a second spring 714. The bottom of the second spring 714 is fixedly connected to one side of the inner wall of the supporting block 708. When it is necessary to rotate the rotating rod 702, the locking plate 713 is inserted into the top of the circular plate 711, and then the locking plate 713 is pulled toward the direction close to the supporting block 708 through the second spring 714, and then one end of the locking plate 713 is restricted inside the circular plate 711, so that the second spring 714 is compressed, and then the circular plate 711 is moved away from the rotating cylinder 707, so that the circular plate 711 can be prevented from affecting the rotation of the rotating cylinder 707.

[0036] Reference Figure 6, Figure 7 and Figure 8 The limiting device 8 includes a fixing tube 801, which is fixedly connected to the top of the base support plate 1, and the inner wall of the fixing tube 801 is slidably connected to the sampling tank 14. A second bolt 802 is inserted through a thread on one side of the fixing tube 801, and the second bolt 802 is arranged on one side of the sampling tank 14. When using the limiting device 8, the sampling tank 14 is manually slid into the inside of the fixing tube 801, and then the second bolt 802 is manually controlled to pass through the fixing tube 801 and squeeze on one side of the sampling tank 14, thereby well limiting the sampling tank 14 on the top of the base support plate 1, and the sampling tank 14 A fixing hole 803 is provided at the top, and a connecting tube 804 is slidably connected to the inner wall of the fixing hole 803. The top of the connecting tube 804 is fixedly connected to the bottom of the bellows 12, and a rubber conical tube 805 is fixedly connected to the bottom surface of the connecting tube 804. A retaining ring 806 is fixedly connected to the surface of the connecting tube 804. The connecting tube 804 is inserted into the fixing hole 803, and then the rubber conical tube 805 is squeezed into the interior of the sampling tank 14, and then the retaining ring 806 is set on the top of the sampling tank 14, so that the bottom of the bellows 12 can be well set on the top of the sampling tank 14. A cam 810 is rotatably inserted at the top of the sampling tank 14, one end of the cam 810 is set at the top of the fixing hole 803, and a first rectangular block 812 is evenly fixedly connected to the semicircular side of the cam 810 to control the rotation of the cam 810, and then the end with the longest diameter of the cam 810 is set at the top of the locking ring 806, so that the locking ring 806 can be well restricted to the top of the sampling tank 14, and a locking groove 807 is opened at the top of the sampling tank 14, and a locking block 808 is slidably connected to the inner wall of the locking groove 807, and a rotating ring 809 is fixedly connected to the top of the locking block 808, and the rotating ring 809 The inner wall is evenly fixedly connected to the second rectangular block 813, the second rectangular block 813 and the first rectangular block 812 are meshed with each other, and the top thread of the rotating ring 809 is penetrated by a third bolt 811. Because the first rectangular block 812 and the second rectangular block 813 are meshed with each other, the cam 810 can be well driven to rotate on the top of the sampling tank 14. When the cam 810 is rotated to a suitable position, the third bolt 811 is manually controlled to pass through the retaining ring 806 and the rotating ring 809 and then squeezed on the top of the sampling tank 14, thereby well restricting the cam 810 to the top of the retaining ring 806.

[0037] Working principle: when using the sampling device, manually rotate the threaded rod 2 to move the connecting block 4 to the appropriate position, and then manually put the connecting ring on the rotating shaft of the engine that needs lubrication, and use the air pump 13 to suck the lubricating oil on the rotating shaft through the connecting pipe 11 and the bellows 12 to the inside of the sampling tank 14. When using the adjusting device 7, when it is necessary to rotate the rotating rod 702, insert the locking plate 713 into the top of the circular plate 711, and then use the second spring 714 to pull the locking plate 713 in the direction close to the support block 708, and then limit one end of the locking plate 713 to the inside of the circular plate 711, so that the second spring 714 is compressed, and the circular plate 711 is moved away from the rotating cylinder 707, which can The first gear 703 and the second gear 705 are meshed with each other, and the rotating cylinder 707 can be controlled to drive the rotating rod 702 to rotate, and then the rotating rod 702 can be controlled to rotate inside the connecting groove 701, and then the first connecting ring 5 can be driven to rotate. When the rotating rod 702 is rotated to a suitable position, the first spring 710 presses the circular plate 711 in the direction away from the supporting block 708, so that the protrusion 712 evenly fixed on one side of the circular plate 711 is pressed on one side of the rotating cylinder 707, so that the connecting ring 5 can be well driven by the rotating cylinder 707. The connecting rod 706 is fixed inside the rectangular plate 704, so that the rotating rod 702 can be well fixed inside the connecting groove 701, so that the first connecting ring 5 can form a certain angle with the horizontal plane, so that the connecting ring can be set on the surface of the rotating shaft that needs to be sampled, which is convenient for sampling of lubricating oil. When using the limiting device 8, the connecting tube 804 is manually inserted into the inside of the fixing hole 803, and then the rubber conical tube 805 is squeezed into the inside of the sampling tank 14. Because the first rectangular block 812 and the second rectangular block 813 are meshed with each other, the rotating ring 809 is manually controlled to rotate, and then the cam 810 can be well driven to rotate on the top of the sampling tank 14. When the cam 810 is rotated to the appropriate position, that is, the cam is The end with the longest diameter of 810 is set at the top of the retaining ring 806, so that the retaining ring 806 can be well restricted to the top of the sampling tank 14, and the third bolt 811 is manually controlled to pass through the retaining ring 806 and the rotating ring 809 and then squeezed on the top of the sampling tank 14, thereby well restricting the cam 810 to the top of the retaining ring 806, and then setting the retaining ring 806 on the top of the sampling tank 14, so that the bottom of the bellows 12 can be well set on the top of the sampling tank 14, and then the sampling tank 14 is manually slid into the interior of the fixed tube 801, and then the second bolt 802 is manually controlled to pass through the fixed tube 801 and then squeezed on one side of the sampling tank 14, thereby well restricting the sampling tank 14 to the top of the base support plate 1.

[0038] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A field sampling device for lubricating oil for civil aviation engines, characterized in that: The invention comprises a base support plate (1), a threaded rod (2) is rotatably inserted at the top of the base support plate (1), a connecting block (4) is threadedly sleeved on the surface of the threaded rod (2), a limiting rod (3) is inserted through the top of the connecting block (4), the limiting rod (3) and the top of the base support plate (1) are fixedly connected, a first connecting ring (5) is arranged on one side of the connecting block (4), a second connecting ring (6) is arranged on one side of the first connecting ring (5), a first bolt (9) is threadedly inserted through one side of the second connecting ring (6), the first bolt (9) is rotatably inserted at one side of the first connecting ring (5), and a round long rod (10) is fixedly connected to one side of the first connecting ring (5) The circular long rod (10) is slidably inserted through one side of the second connecting ring (6), a connecting pipe (11) is provided on one side of the connecting block (4), an air pump (13) is fixedly connected to the middle of the connecting pipe (11), one end of the connecting pipe (11) is inserted through one side of the first connecting ring (5), a bellows (12) is fixedly connected to the bottom of the connecting pipe (11), a sampling tank (14) is provided at the bottom of the bellows (12), an adjusting device (7) is provided on one side of the connecting block (4), a limiting device (8) is provided on the top of the base support plate (1), the adjusting device (7) includes a rotating rod (702), and a connecting groove is provided on one side of the connecting block (4). (701), the rotating rod (702) is rotatably inserted on one side of the inner wall of the connecting groove (701), the end of the rotating rod (702) away from the connecting groove (701) is fixedly connected to one side of the first connecting ring (5), and the surface of the rotating rod (702) is fixedly connected to the first gear (703); one side of the connecting block (4) is fixedly connected to a rectangular plate (704), one side of the rectangular plate (704) is rotatably penetrated by a connecting rod (706), one end of the connecting rod (706) is fixedly connected to a second gear (705), the second gear (705) and the first gear (703) are meshed with each other, and the end of the connecting rod (706) away from the second gear (705) A rotating cylinder (707) is fixedly connected; one side of the connecting block (4) is fixedly connected to a supporting block (708); one side of the supporting block (708) is fixedly connected to a damping rod (709); one end of the damping rod (709) away from the supporting block (708) is fixedly connected to a circular plate (711); one side of the circular plate (711) away from the damping rod (709) is evenly fixedly connected to a protrusion (712); a first spring (710) is sleeved on the surface of the damping rod (709); one end of the first spring (710) is fixedly connected to one side of the supporting block (708); and one end of the first spring (710) close to the damping rod (709) is fixedly connected to one side of the circular plate (711);A locking plate (713) is slidably inserted at the top of the support block (708), and the locking plate (713) is slidably inserted at the top of the circular plate (711). A second spring (714) is fixedly connected to the bottom of the locking plate (713), and the bottom of the second spring (714) is fixedly connected to one side of the inner wall of the support block (708).

2. The field sampling device for lubricating oil for civil aviation engines according to claim 1 is characterized in that: The limiting device (8) comprises a fixing tube (801), wherein the fixing tube (801) is fixedly connected to the top of the base support plate (1), the inner wall of the fixing tube (801) is slidably connected to the sampling tank (14), and a second bolt (802) is threadedly inserted through one side of the fixing tube (801), and the second bolt (802) is arranged on one side of the sampling tank (14).

3. The field sampling device for lubricating oil for civil aviation engines according to claim 2 is characterized in that: A fixing hole (803) is provided at the top of the sampling tank (14), a connecting tube (804) is slidably connected to the inner wall of the fixing hole (803), the top of the connecting tube (804) is fixedly connected to the bottom of the bellows (12), a rubber conical tube (805) is fixedly connected to the bottom surface of the connecting tube (804), and a retaining ring (806) is fixedly connected to the surface of the connecting tube (804).

4. The lubricating oil field sampling device for civil aviation engines according to claim 3, characterized in that: A cam (810) is rotatably inserted at the top of the sampling tank (14), and one end of the cam (810) is arranged at the top of the fixing hole (803).

5. The field sampling device for lubricating oil for civil aviation engines according to claim 4 is characterized in that: A first rectangular block (812) is evenly and fixedly connected to the semicircular side of the cam (810).

6. The field sampling device for lubricating oil for civil aviation engines according to claim 5, characterized in that: A locking groove (807) is provided on the top of the sampling tank (14), and a locking block (808) is slidably connected to the inner wall of the locking groove (807).

7. The field sampling device for lubricating oil for civil aviation engines according to claim 6 is characterized in that: The top of the positioning block (808) is fixedly connected to a rotating ring (809), the inner wall of the rotating ring (809) is evenly fixedly connected to the second rectangular block (813), the second rectangular block (813) and the first rectangular block (812) are meshed with each other, and a third bolt (811) is inserted through the top thread of the rotating ring (809).

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