Optical observation device for lubricating oil

Abstract

The invention relates to the technical field of optical detection, and discloses a lubricating oil optical observation device which comprises a main pipeline, the outer wall of the main pipeline is fixedly connected with a sampling inspection pipe, the inner wall of the main pipeline is rotatably connected with a reversing valve, and the outer wall of the main pipeline is fixedly connected with the inner wall of a supporting rod. The inner wall of the side, away from the sampling inspection pipe, of the supporting rod is fixedly connected with the outer wall of a supporting plate, a second positioning groove is formed in the surface of the supporting plate, the surface of the supporting plate is fixedly connected with the bottom of a positioning plate, the bottom of the inner wall of the positioning plate is fixedly connected with the bottom of an inspection light source, and the surface of the supporting plate is fixedly connected with the bottom of an observation mirror. The bottom of the supporting plate is fixedly connected with the top of a cylinder. The lubricating oil optical observation device is provided with the extraction mechanism, the extraction mechanism is used for guiding lubricating oil, the lubricating oil can enter the observation mechanism conveniently during sampling inspection, the lubricating oil is prevented from leaking during sampling inspection, and when the quality of the lubricating oil is unqualified, multiple times of extraction can be conducted, so that the lubricating oil optical observation device is normally used.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and specifically to an optical observation device for lubricating oil. Background Art

[0002] In today's industrial field, the demand for lubricating oil continues to grow. With the continuous development and upgrading of various mechanical equipment, the performance requirements for lubricating oil are also increasing day by day. In order to meet the operating needs of different equipment under various complex working conditions, the production of lubricating oil has become a crucial industry. Lubricating oil plays a key role in reducing friction, reducing wear, cooling equipment, sealing and preventing leakage, etc.

[0003] The patent application with the application number CN202320116493.X discloses an optical observation device for lubricating oil. There are a visualization through-hole and two first closed channels for the circulation of lubricating oil between the upper shell and the lower shell. The visualization through-hole penetrates through the upper shell and the lower shell along the direction perpendicular to the fitting of the upper shell and the lower shell. The visualization through-hole is filled with a visualization filling block, and a second closed channel for the circulation of lubricating oil is opened in the visualization filling block. The two first closed channels are respectively located on both sides of the visualization through-hole along the radial direction of the visualization through-hole, and are respectively connected to the second closed channel at the head and the tail. Locking mechanisms are respectively detachably connected to both ends of the visualization through-hole.

[0004] However, when the quality of the lubricating oil is unqualified during the production process of the existing optical observation device for lubricating oil, continuous sampling inspection cannot be carried out. This makes it difficult to monitor the quality of the lubricating oil in real time and comprehensively at each stage during the production process, resulting in limited use of the optical observation device for lubricating oil. Summary of the Invention

[0005] The purpose of the present invention is to provide an optical observation device for lubricating oil to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An optical observation device for lubricating oil, including a main pipeline, a sampling inspection pipe is fixedly connected to the outer wall of the main pipeline, a reversing valve is rotatably connected to the inner wall of the main pipeline, the outer wall of the main pipeline is fixedly connected to the inner wall of a support rod, the inner wall of the support rod on the side away from the sampling inspection pipe is fixedly connected to the outer wall of a support plate, a second positioning groove is opened on the surface of the support plate, the surface of the support plate is fixedly connected to the bottom of a positioning plate, the bottom of the inner wall of the positioning plate is fixedly connected to the bottom of an inspection light source, the surface of the support plate is fixedly connected to the bottom of an observation mirror, the bottom of the support plate is fixedly connected to the top of a cylinder, a first guiding groove is opened on the outer wall of the sampling inspection pipe, a second guiding groove is opened on the inner wall of the sampling inspection pipe, and further includes:

[0007] Extraction mechanism, the extraction mechanism is arranged on the inner wall of the sampling tube. The extraction mechanism includes a first positioning block. The outer wall of the first positioning block is rotationally connected to the inner wall of the sampling tube through a bearing. The top of the first positioning block is fixedly connected to the bottom of the connecting block. A first positioning groove is provided on the outer wall of the first positioning block. The outer wall of the first positioning block is slidably connected to the inner wall of the top plate. A first sliding groove is provided on the outer wall of the first positioning block. The wall of the first sliding groove is slidably connected to the outer wall of the sliding rod. One end of the sliding rod close to the top plate penetrates through the first sliding groove and is fixedly connected to the inner wall of the top plate. A first spring is arranged on the outer wall of the sliding rod. One end of the first spring is fixedly connected to the outer wall of the sliding rod, and the other end is fixedly connected to the wall of the first sliding groove. The outer wall of the top plate is fixedly connected to the outer wall of the sealing ring. A second sliding groove is provided on the outer wall of the first positioning block. The wall of the second sliding groove is slidably connected to the outer wall of the first locking block. A second spring is arranged inside the second sliding groove. One end of the second spring is fixedly connected to the outer wall of the first locking block, and the other end is fixedly connected to the wall of the second sliding groove. An observation mechanism is arranged at the bottom of the connecting block, and a positioning mechanism is arranged at the bottom of the first positioning block.

[0008] According to the above technical solution, a third sliding groove is provided on the outer wall of the first positioning block. The wall of the third sliding groove is slidably connected to the outer wall of the second locking block. A third spring is arranged inside the third sliding groove. One end of the third spring is fixedly connected to the wall of the third sliding groove, and the other end is fixedly connected to the outer wall of the third locking block. The number of the first positioning block, the top plate, the sealing ring, the sliding rod, the first spring, the first locking block and the third spring is two groups. The two groups of the first positioning block, the top plate, the sealing ring, the sliding rod, the first spring, the first locking block and the third spring are symmetrically arranged at the bottom of the connecting block with the center line of the connecting block as the axis of symmetry. The number of the second locking block and the second spring is four groups. The four groups of the second locking block and the second spring are symmetrically arranged inside the first positioning block with the center line of the connecting block as the axis of symmetry.

[0009] According to the above technical solution, the positioning mechanism includes a chassis. The surface of the chassis is rotationally connected to the first positioning block through a bearing. The bottom of the chassis is fixedly connected to the top of the connecting rod. The bottom of the connecting rod is fixedly connected to the top of the support block. The outer wall of the support block is fixedly connected to the output end of the cylinder.

[0010] According to the above technical solution, a fourth sliding groove is provided at the bottom of the chassis. The wall of the fourth sliding groove is slidably connected to the outer wall of the third locking block. A fourth spring is arranged inside the fourth sliding groove. One end of the fourth spring is fixedly connected to the wall of the fourth sliding groove, and the other end is fixedly connected to the outer wall of the third locking block. The number of the third locking block and the fourth spring is two groups. The two groups of the third locking block and the fourth spring are symmetrically arranged inside the chassis with the center line of the chassis as the axis of symmetry.

[0011] According to the above technical solution, the observation mechanism includes a sampling box, the outer wall of the sampling box is slidably connected to the inner wall of the positioning block one, the outer wall of the sampling box is provided with a locking groove, the outer wall of the sampling box is fixedly connected to the outer wall of the positioning block three, the outer wall of the positioning block three is clamped with the outer wall of the outer plate, the outer wall of the outer plate is provided with an injection hole, the bottom of the sampling box is fixedly connected to the top of the positioning block two, and the bottom of the positioning block two is clamped with the surface of the chassis.

[0012] According to the above technical solution, the outer wall of the top plate is rotatably connected to the inner wall of the sampling tube, the bottom of the positioning block is rotatably connected to the surface of the chassis, and the locking block is close to one end of the sampling tube and is squeezed through the sliding groove by the second spring to protrude from the outer wall of the positioning block and clamped with the inner wall of the sampling tube.

[0013] According to the above technical solution, the end of the locking block three away from the positioning block one is squeezed by the spring four to pass through the sliding groove four and protrude from the bottom of the chassis.

[0014] According to the above technical solution, the outer wall of the positioning block 3 is slidably connected to the wall of the positioning groove 1, the top of the sampling box is slidably connected to the bottom of the connecting block, and the wall of the positioning groove 1 and the locking block 2 near one end of the locking groove are squeezed through the sliding groove 3 by spring 3 and protrude from the outer wall of the positioning block 1 for clamping.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The lubricating oil optical observation device is provided with an extraction mechanism, through which the lubricating oil is guided to enter the observation mechanism for convenient sampling of the lubricating oil, and to prevent leakage of the lubricating oil during sampling. When the quality of the lubricating oil is unqualified, multiple extractions can be performed to more comprehensively and accurately detect and analyze the lubricating oil, so that the lubricating oil optical observation device can be used normally.

[0017] 2. The lubricating oil optical observation device is provided with a positioning mechanism, which can effectively limit the position of the extraction mechanism to prevent the extraction mechanism from being offset during the lubricating oil sampling, resulting in the inability to inject the lubricating oil into the observation mechanism. Through the precise positioning of the positioning mechanism, it can ensure that the extraction mechanism operates in the correct position, thereby ensuring that the lubricating oil can be smoothly injected into the observation mechanism, so that the lubricating oil optical observation device can be used normally.

[0018] 3. The lubricating oil optical observation device is provided with an observation mechanism. By drawing the lubricating oil into the observation mechanism and pulling it out for optical observation, no excess grease will be attached, which is convenient for operators to perform detection operations. When the lubricating oil has quality problems, the lubricating oil can be disassembled and scrapped in time, so that the lubricating oil optical observation device can be used normally.

[0019] 4. The optical observation device for lubricating oil is provided with a sampling pipe. The solid lubricating oil is diverted into the observation mechanism through the sampling pipe, eliminating the need for operators to perform cumbersome extrusion operations, shortening the operation time, making the entire operation process more convenient and efficient, and enabling the normal use of the optical observation device for lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic structural diagram of the present invention;

[0022] Figure 3 is a cross-sectional view of the sampling pipe of the present invention;

[0023] Figure 4 is a schematic structural diagram of the extraction mechanism of the present invention;

[0024] Figure 5 is a schematic structural diagram of the extraction mechanism of the present invention;

[0025] Figure 6 is a cross-sectional view of the extraction mechanism of the present invention;

[0026] Figure 7 is a cross-sectional view of the extraction mechanism of the present invention;

[0027] Figure 8 is a cross-sectional view of the positioning mechanism of the present invention;

[0028] Figure 9 of the present invention Figure 8 is an enlarged schematic view of A;

[0029] Figure 10 is a schematic structural diagram of the observation mechanism of the present invention.

[0030] In the figure: 1, main pipeline; 2, sampling pipe; 3, extraction mechanism; 301, positioning block 1; 302, connecting block; 303, top plate; 304, sealing ring; 305, positioning groove 1; 306, sliding rod; 307, spring 1; 308, sliding groove 1; 309, sliding groove 2; 3010, locking block 1; 3011, spring 2; 3012, sliding groove 3; 3013, locking block 2; 3014, spring 3; 31, positioning mechanism; 311, chassis; 312, connecting rod; 313, support block; 314, sliding groove 4; 315, spring 4; 316, locking block 3; 32, observation mechanism; 321, sampling box; 322, positioning block 2; 323, outer plate; 324, positioning block 3; 325, locking groove; 326, injection hole; 4, support rod; 5, support plate; 6, positioning groove 2; 7, positioning plate; 8, inspection light source; 9, cylinder; 10, observation mirror; 11, reversing valve; 12, guiding groove 1; 13, guiding groove 2. Detailed implementation mode

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1, please refer to Figures 1-7 , the present invention provides a technical solution: an optical observation device for lubricating oil, including a main pipeline 1, a sampling pipeline 2 is fixedly connected to the outer wall of the main pipeline 1, a reversing valve 11 is rotatably connected to the inner wall of the main pipeline 1, the outer wall of the main pipeline 1 is fixedly connected to the inner wall of a support rod 4, the inner wall of the support rod 4 on the side away from the sampling pipeline 2 is fixedly connected to the outer wall of a support plate 5, a second positioning groove 6 is formed on the surface of the support plate 5, the surface of the support plate 5 is fixedly connected to the bottom of a positioning plate 7, the bottom of the inner wall of the positioning plate 7 is fixedly connected to the bottom of an inspection light source 8, the surface of the support plate 5 is fixedly connected to the bottom of an observation mirror 10, the bottom of the support plate 5 is fixedly connected to the top of a cylinder 9, a first guiding groove 12 is formed on the outer wall of the sampling pipeline 2, a second guiding groove 13 is formed on the inner wall of the sampling pipeline 2, and further includes:

[0033] An extraction mechanism 3, the extraction mechanism 3 is arranged inside the sampling pipeline 2, the extraction mechanism 3 includes a first positioning block 301, the outer wall of the first positioning block 301 is rotatably connected to the inner wall of the sampling pipeline 2 through a bearing, the top of the first positioning block 301 is fixedly connected to the bottom of a connecting block 302, a first positioning groove 305 is formed on the outer wall of the first positioning block 301, the outer wall of the first positioning block 301 is slidably connected to the inner wall of a top plate 303, a first sliding groove 308 is formed on the outer wall of the first positioning block 301, the groove wall of the first sliding groove 308 is slidably connected to the outer wall of a sliding rod 306, one end of the sliding rod 306 close to the top plate 303 penetrates through the first sliding groove 308 and is fixedly connected to the inner wall of the top plate 303, a first spring 307 is arranged on the outer wall of the sliding rod 306, one end of the first spring 307 is fixedly connected to the outer wall of the sliding rod 306, and the other end is fixedly connected to the groove wall of the first sliding groove 308, the outer wall of the top plate 303 is fixedly connected to the outer wall of a sealing ring 304, a second sliding groove 309 is formed on the outer wall of the first positioning block 301, the groove wall of the second sliding groove 309 is slidably connected to the outer wall of a first locking block 3010, a second spring 3011 is arranged inside the second sliding groove 309, one end of the second spring 3011 is fixedly connected to the outer wall of the first locking block 3010, and the other end is fixedly connected to the groove wall of the second sliding groove 309, an observation mechanism 32 is arranged at the bottom of the connecting block 302, and a positioning mechanism 31 is arranged at the bottom of the first positioning block 301;

[0034] The outer wall of the first positioning block 301 is provided with a third sliding groove 3012. The groove wall of the third sliding groove 3012 is slidably connected to the outer wall of the second locking block 3013. A third spring 3014 is arranged inside the third sliding groove 3012. One end of the third spring 3014 is fixedly connected to the groove wall of the third sliding groove 3012, and the other end is fixedly connected to the outer wall of the third locking block 316. The number of the first positioning block 301, the top plate 303, the sealing ring 304, the sliding rod 306, the first spring 307, the first locking block 3010 and the third spring 3014 is two groups. The two groups of the first positioning block 301, the top plate 303, the sealing ring 304, the sliding rod 306, the first spring 307, the first locking block 3010 and the third spring 3014 are symmetrically arranged at the bottom of the connecting block 302 with the center line of the connecting block 302 as the axis of symmetry. The number of the second locking block 3013 and the second spring 3011 is four groups. The four groups of the second locking block 3013 and the second spring 3011 are symmetrically arranged inside the first positioning block 301 with the center line of the connecting block 302 as the axis of symmetry;

[0035] The outer wall of the top plate 303 is rotatably connected to the inner wall of the sampling pipe 2. The bottom of the first positioning block 301 is rotatably connected to the surface of the chassis 311. One end of the first locking block 3010 close to the sampling pipe 2 is extruded through the second sliding groove 309 by the second spring 3011 and protrudes out of the outer wall of the first positioning block 301 to be clamped with the inner wall of the sampling pipe 2.

[0036] The working principle of this embodiment is as follows: When the lubricating oil optical observation device is put into use, when it is necessary to conduct an optical observation and detection on the lubricating oil, the operator rotates the reversing valve 11 to introduce the lubricating oil into the sampling pipe 2. At the same time, the connecting block 302 is rotated to make the first positioning block 301 rotate on the inner wall of the sampling pipe 2. After the protrusion of the connecting block 302 is parallel to the sampling pipe 2, the first locking block 3010 is clamped with the inner wall of the sampling pipe 2 by the extrusion of the second spring 3011. The lubricating oil is injected into the observation mechanism 32 through the second guiding groove 13. After the injection is completed, the connecting block 302 is rotated back to the state where the protrusion is perpendicular to the sampling pipe 2. The top plate 303 slides the sliding rod 306 on the outer wall of the first positioning block 301 by the extrusion of the first spring 307, so that the sealing cover seals the second guiding groove 13 to prevent the lubricating oil from leaking during the detection. The air cylinder 9 is started, and the observation mechanism 32 is driven by the positioning mechanism 31 to leave the sampling pipe 2. The positioning mechanism 31 and the observation mechanism 32 are positioned and locked through the guiding groove and the positioning plate 7, so that the observation mechanism 32 is aligned with the inspection light source 8. The operator observes through the observation mirror 10. After the lubricating oil is detected to be qualified, the air cylinder 9 is started to send the lubricating oil back into the sampling pipe 2 to prevent the lubricating oil from oxidizing. When the lubricating oil is detected to be unqualified, the internal lubricating oil is cleaned by disassembling the observation mechanism 32, and the above steps are repeated for continuous detection until the product is qualified.

[0037] Embodiment 2, please refer to Figures 8-9, the present invention provides a technical solution: The positioning mechanism 31 includes a chassis 311. The surface of the chassis 311 is rotatably connected to the first positioning block 301 through a bearing. The bottom of the chassis 311 is fixedly connected to the top of the connecting rod 312. The bottom of the connecting rod 312 is fixedly connected to the top of the support block 313. The outer wall of the support block 313 is fixedly connected to the output end of the cylinder 9;

[0038] A sliding groove four 314 is opened at the bottom of the chassis 311. The wall of the sliding groove four 314 is slidably connected to the outer wall of the third locking block 316. A fourth spring 315 is arranged inside the sliding groove four 314. One end of the fourth spring 315 is fixedly connected to the wall of the sliding groove four 314, and the other end is fixedly connected to the outer wall of the third locking block 316. The number of the third locking blocks 316 and the fourth springs 315 is two groups. The two groups of the third locking blocks 316 and the fourth springs 315 are symmetrically arranged inside the chassis 311 with the center line of the chassis 311 as the axis of symmetry;

[0039] One end of the third locking block 316 away from the first positioning block 301 protrudes from the bottom of the chassis 311 through the sliding groove four 314 under the extrusion of the fourth spring 315.

[0040] The working principle of this embodiment is as follows: After the oil injection of the observation mechanism 32 is completed, the cylinder 9 drives the support block 313 and the chassis 311 to take the observation mechanism 32 out of the sampling tube 2. The connecting rod 312 is positioned through the second positioning groove 6, so that the chassis 311 moves to the surface of the positioning plate 7. The third locking block 316 is clamped with the surface of the positioning plate 7 under the extrusion of the fourth spring 315. The inspection light source 8 inside the positioning plate 7 is used to check through the lubricating oil.

[0041] Embodiment 3, based on Embodiment 1, please refer to Figure 10 , the present invention provides a technical solution: The observation mechanism 32 includes a sampling box 321. The outer wall of the sampling box 321 is slidably connected to the inner wall of the first positioning block 301. A locking groove 325 is opened on the outer wall of the sampling box 321. The outer wall of the sampling box 321 is fixedly connected to the outer wall of the third positioning block 324. The outer wall of the third positioning block 324 is clamped with the outer wall of the outer plate 323. An injection hole 326 is opened on the outer wall of the outer plate 323. The bottom of the sampling box 321 is fixedly connected to the top of the second positioning block 322. The bottom of the second positioning block 322 is clamped with the surface of the chassis 311. The material of the sampling box 321 is transparent organic glass, which is convenient for operators to conduct optical observations;

[0042] The outer wall of the third positioning block 324 is slidably connected to the wall of the first positioning groove 305. The top of the sampling box 321 is slidably connected to the bottom of the connecting block 302. One end of the second locking block 3013 close to the locking groove 325 on the wall of the first positioning groove 305 protrudes from the outer wall of the first positioning block 301 and is clamped under the extrusion of the third spring 3014.

[0043] The working principle of this embodiment is as follows: The sampling box 321 drives the rotation through the connecting block 302 and the first positioning block 301, causing the outer plate 323 to turn towards the second guiding groove 13, so that the lubricating oil is injected into the inner sampling box 321 through the injection hole 326. After the injection is completed, it is limited by the chassis 311 and the third positioning block 324, driving the sampling box 321 to slide in the first positioning groove 305 on the outer wall of the first positioning block 301 through the second positioning block 322, and leaving the sampling pipe 2 through the first guiding groove 12 to the surface of the positioning plate 7 for optical observation. When the quality of the lubricating oil is unqualified, the unqualified lubricating oil is taken out by disassembling the outer plate 323 and then re-inspected.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lubricating oil optical observation device, comprising a main pipeline (1), the outer wall of the main pipeline (1) is fixedly connected to a sampling tube (2), the inner wall of the main pipeline (1) is rotatably connected to a reversing valve (11), the outer wall of the main pipeline (1) is fixedly connected to the inner wall of a support rod (4), the inner wall of the support rod (4) away from the sampling tube (2) is fixedly connected to the outer wall of a support plate (5), the surface of the support plate (5) is provided with a second positioning groove (6), the surface of the support plate (5) is fixedly connected to the bottom of a positioning plate (7), the bottom of the inner wall of the positioning plate (7) is fixedly connected to the bottom of an inspection light source (8), the surface of the support plate (5) is fixedly connected to the bottom of an observation mirror (10), the bottom of the support plate (5) is fixedly connected to the top of a cylinder (9), the outer wall of the sampling tube (2) is provided with a first guide groove (12), and the inner wall of the sampling tube (2) is provided with a second guide groove (13), characterized in that: Also includes: The extraction mechanism (3) is arranged on the inner wall of the sampling tube (2), and the extraction mechanism (3) comprises a positioning block (301). The outer wall of the positioning block (301) is rotatably connected to the inner wall of the sampling tube (2) through a bearing, the top of the positioning block (301) is fixedly connected to the bottom of the connecting block (302), the outer wall of the positioning block (301) is provided with a positioning groove (305), the outer wall of the positioning block (301) is slidably connected to the inner wall of the top plate (303), the outer wall of the positioning block (301) is provided with a sliding groove (308), the groove wall of the sliding groove (308) is slidably connected to the outer wall of the sliding rod (306), the end of the sliding rod (306) close to the top plate (303) passes through the sliding groove (308) and is fixedly connected to the inner wall of the top plate (303), and the sliding rod (3 06) A spring 1 (307) is arranged on the outer wall, one end of the spring 1 (307) is fixedly connected to the outer wall of the sliding rod (306), and the other end is fixedly connected to the groove wall of the sliding groove 1 (308); the outer wall of the top plate (303) is fixedly connected to the outer wall of the sealing ring (304); a sliding groove 2 (309) is opened on the outer wall of the positioning block 1 (301); the groove wall of the sliding groove 2 (309) is slidably connected to the outer wall of the locking block 1 (3010); a spring 2 (3011) is arranged inside the sliding groove 2 (309); one end of the spring 2 (3011) is fixedly connected to the outer wall of the locking block 1 (3010), and the other end is fixedly connected to the groove wall of the sliding groove 2 (309); an observation mechanism (32) is arranged at the bottom of the connecting block (302); and a positioning mechanism (31) is arranged at the bottom of the positioning block 1 (301).

2. The lubricating oil optical observation device according to claim 1, characterized in that: The outer wall of the positioning block 1 (301) is provided with a sliding groove 3 (3012), the groove wall of the sliding groove 3 (3012) is slidably connected to the outer wall of the locking block 2 (3013), a spring 3 (3014) is arranged inside the sliding groove 3 (3012), one end of the spring 3 (3014) is fixedly connected to the groove wall of the sliding groove 3 (3012), and the other end is fixedly connected to the outer wall of the locking block 3 (316), the positioning block 1 (301), the top plate (303), the sealing ring (304), the sliding rod (306), the spring 1 (307), the locking block 1 (3010) and the spring 3 (3 014) are in two groups, the two groups of positioning block one (301), top plate (303), sealing ring (304), sliding rod (306), spring one (307), locking block one (3010) and spring three (3014) are all symmetrically arranged at the bottom of the connecting block (302) with the center line of the connecting block (302) as the symmetry axis, and the number of locking block two (3013) and spring two (3011) are four groups, and the four groups of locking block two (3013) and spring two (3011) are all symmetrically arranged inside the positioning block one (301) with the center line of the connecting block (302) as the symmetry axis.

3. The lubricating oil optical observation device according to claim 1, characterized in that: The positioning mechanism (31) comprises a chassis (311), the surface of the chassis (311) being rotatably connected to the first positioning block (301) via a bearing, the bottom of the chassis (311) being fixedly connected to the top of a connecting rod (312), the bottom of the connecting rod (312) being fixedly connected to the top of a supporting block (313), and the outer wall of the supporting block (313) being fixedly connected to the output end of the cylinder (9).

4. The lubricating oil optical observation device according to claim 3, characterized in that: A sliding groove four (314) is provided at the bottom of the chassis (311), and the groove wall of the sliding groove four (314) is slidably connected to the outer wall of the locking block three (316). A spring four (315) is arranged inside the sliding groove four (314), and one end of the spring four (315) is fixedly connected to the groove wall of the sliding groove four (314), and the other end is fixedly connected to the outer wall of the locking block three (316). The locking block three (316) and the spring four (315) are both provided in two groups, and the two groups of the locking block three (316) and the spring four (315) are symmetrically arranged inside the chassis (311) with the center line of the chassis (311) as the symmetry axis.

5. The lubricating oil optical observation device according to claim 1, characterized in that: The observation mechanism (32) comprises a sampling box (321), the outer wall of the sampling box (321) is slidably connected to the inner wall of the first positioning block (301), the outer wall of the sampling box (321) is provided with a locking groove (325), the outer wall of the sampling box (321) is fixedly connected to the outer wall of the third positioning block (324), the outer wall of the third positioning block (324) is snap-fitted to the outer wall of the outer plate (323), the outer wall of the outer plate (323) is provided with an injection hole (326), the bottom of the sampling box (321) is fixedly connected to the top of the second positioning block (322), and the bottom of the second positioning block (322) is snap-fitted to the surface of the bottom plate (311).

6. The lubricating oil optical observation device according to claim 1, characterized in that: The outer wall of the top plate (303) is rotatably connected to the inner wall of the sampling tube (2); the bottom of the positioning block 1 (301) is rotatably connected to the surface of the bottom plate (311); the locking block 1 (3010) is close to one end of the sampling tube (2) and is squeezed through the sliding groove 2 (309) by the spring 2 (3011) to protrude from the outer wall of the positioning block 1 (301) and be clamped with the inner wall of the sampling tube (2).

7. The lubricating oil optical observation device according to claim 4, characterized in that: The end of the locking block 3 (316) away from the positioning block 1 (301) is squeezed through the sliding groove 4 (314) by the spring 4 (315) and protrudes from the bottom of the chassis (311).

8. The lubricating oil optical observation device according to claim 5, characterized in that: The outer wall of the positioning block three (324) is slidably connected to the groove wall of the positioning groove one (305), the top of the sampling box (321) is slidably connected to the bottom of the connecting block (302), and the groove wall of the positioning groove one (305) and the locking block two (3013) are squeezed through the sliding groove three (3012) by the spring three (3014) to protrude from the outer wall of the positioning block one (301) and snap-fit.

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