Lubricating oil sample detection device

Abstract

The utility model discloses a lubricating oil sample detection device, which belongs to the technical field of detection devices and comprises a body and a cover hinged to the body. Two quick connectors are arranged on the right side face of the body, hoses are inserted into the quick connectors, and the other end of one hose is inserted into lubricating oil in the sample bottle and serves as the oil inlet end of the detection device. When the device is used, firstly, the hose is inserted into the two quick connectors, the plugging devices in the quick connectors are automatically opened, communication between the hose and the quick connectors is not affected, then the outer end of the hose at the oil inlet end is inserted into lubricating oil in a sample bottle, and the outer end of the hose at the discharge end is inserted into an empty bottle; a power switch is pressed to start up, and lubricating oil is detected; finishing the detection; when the quick connector is used, the hose of the quick connector is pulled out, the plugging device plugs the internal channel of the quick connector, dust in air is prevented from entering the body from the quick connector, and the purpose that the plugging device plugs the internal channel of the quick connector to achieve dust prevention when the quick connector is not used is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a detection device, especially a lubricating oil sample detection device. BACKGROUND

[0002] At present, the lubricating oil sample detection device can test the lubricating oil, and the measured data includes water content, water activity, viscosity, density and dielectric constant. According to the characteristics that the dielectric constant of oil changes with the water content, wear particles and acid value, the change of the dielectric constant is monitored in real time by using a capacitive sensor, so that the oil aging and pollution can be grasped as a whole.

[0003] The existing lubricating oil sample detection device generally includes a pumping device, which draws the lubricating oil in the sample bottle into the device for detection. The specific operation process is as follows: first, insert the hose into the two quick connectors on the detection device, then insert the outer end of the oil inlet hose into the lubricating oil in the sample bottle, and insert the outer end of the discharge hose into the empty bottle; press the power switch to start, and operate on the touch control screen interface; after the detection is completed, perform emptying and cleaning operation on the touch control screen interface, the purpose is to empty the residual liquid in the lubricating oil sample detection device, then pull out the hose, and insert the dust plug into the two quick connectors to prevent dust in the air from entering the inside of the body.

[0004] After the above detection operation is completed, the dust plug needs to be inserted into the two quick connectors to prevent dust in the air from entering the detection device, thereby preventing the use performance of the detection device from being affected. The dust plug is easy to fall off during actual use, thereby causing the dust plug to be lost, and the operator is easy to forget to insert the dust plug into the quick connector after detection, which will cause a certain degree of adverse effect on the use performance of the detection device. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a lubricating oil sample detection device, the quick connector of the detection device has the advantages of dust prevention, effectively solving the problem of the use performance of the detection device in the prior art being reduced due to the quick connector not having the function of dust prevention.

[0006] The utility model adopts the following technical scheme: a lubricating oil sample detection device, including the body and the hinge on the body on the cover, the right side of the body is provided with two quick connectors, the quick connector is inserted into the hose, one end of one of the hoses is inserted into the lubricating oil in the sample bottle, as the oil inlet end of the detection device, the other end of the other hose is inserted into the empty bottle, as the discharge end of the detection device, the quick connector is provided with a plugging device, the plugging device is used for plugging the internal passage of the quick connector when the hose is not inserted into the quick connector, and the internal passage of the quick connector is opened when the hose is inserted into the quick connector.

[0007] Further, the quick connector comprises a threaded sleeve fixed on the right side of the body, and a connector assembly screwed in the threaded sleeve, a connector is arranged in the threaded sleeve, a locking mechanism is arranged in the connector assembly, and the blocking device is arranged on the left side of the locking mechanism in the connector assembly.

[0008] Further, the connector assembly comprises a hollow driving body, a threaded column is fixedly arranged at the left end of the driving body, a through hole is arranged in the threaded column and communicates with the inside of the driving body, the threaded column is screwed with the threaded sleeve, the locking mechanism comprises a locking sleeve slidingly arranged at the right end of the inside of the driving body along the left-right direction, and a locking ring fixedly arranged at the left side of the locking sleeve in the inside of the driving body, a plurality of spring sheets are uniformly fixedly arranged on the left side surface of the locking ring along the circumferential direction, the inner end of each spring sheet is inwardly contracted, and a tapered surface is arranged at the left end of the locking sleeve.

[0009] Further, the outer surface of the locking sleeve is fixedly provided with a driving sleeve, a sliding cavity is arranged in the inside of the driving body, and the driving sleeve is slidingly arranged in the sliding cavity of the driving body along the left-right direction; a return spring is fixedly arranged between the left end of the driving sleeve and the inner side wall of the sliding cavity; the return spring always drives the locking sleeve to move rightward through the driving sleeve; a circular chamber for accommodating the blocking device is arranged at the left side of the inside of the driving body, an L-shaped rod is fixedly arranged on the outer side surface of the driving sleeve, the left end of the L-shaped rod is located in the circular chamber and connected with the blocking device, and the L-shaped rod is slidingly arranged in the driving body along the left-right direction.

[0010] Further, the inner side wall of the driving sleeve is fixedly embedded with an inner sleeve, a fixed groove is arranged on the right side surface of the inner sleeve, and the locking ring is fixedly arranged in the fixed groove; the blocking device comprises a fixed ring fixedly arranged at the left end of the inner sleeve, and a driving ring rotationally connected to the outer surface of the fixed ring, a plurality of sliding grooves are arranged on the left side surface of the driving ring, a plurality of blocking plates are hingedly connected to the left side surface of the fixed ring, each blocking plate comprises three corners, the blocking plate is hingedly connected to the fixed ring through the first corner, a sliding pin located in the sliding groove is fixedly arranged on the second corner of the blocking plate, a barrel is fixedly arranged on the left side surface of the driving ring, a threaded groove is arranged on the outer surface of the barrel, a limiting pin is fixedly arranged at the left end of the L-shaped rod, and the limiting pin is located in the threaded groove.

[0011] Further, the left side surface of the fixed ring is fixedly arranged with the threaded column, and the left side surface of the driving body is fixedly arranged with the threaded column through the annular plate.

[0012] Further, the connector comprises a threaded plug, an inner hole is coaxially arranged in the threaded plug, a filter screen is fixedly arranged on the left side of the inner hole of the threaded plug, a circular table surface is arranged on the right side of the inner hole of the threaded plug, and the inner hole of the threaded plug located on the right side of the filter screen is a hexagonal structure.

[0013] Further, the upper end face of the body is provided with a thermal printer, a USB jack, a V power interface, a power switch and a touch control screen.

[0014] Firstly, the soft tube is inserted into the two quick couplings, the blocking device in the quick coupling is automatically opened, the communication of the soft tube and the quick coupling is not affected, then the outer end of the soft tube of the oil inlet end is inserted into the lubricating oil in the sample bottle, the outer end of the soft tube of the discharge end is inserted into the empty bottle, the power switch is pressed to start, the lubricating oil is detected, after the detection is completed, the soft tube of the quick coupling is pulled out, the blocking device blocks the internal passage of the quick coupling, the dust in the air is prevented from entering the inside of the body from the quick coupling, and the internal passage of the quick coupling is blocked by the blocking device when the quick coupling is not used, and the dustproof purpose is achieved.

[0015] Secondly, when the locking sleeve is pressed, the locking sleeve moves to the left and drives the driving sleeve to move to the left, the driving sleeve drives the L-shaped rod to move to the left, the L-shaped rod moves to the left and pushes the driving ring to rotate counterclockwise through the cooperation of the limiting pin and the threaded groove of the cylinder, the driving ring drives the second corner of the blocking plate to rotate outward around the first corner through the cooperation of the sliding groove and the sliding pin, the third corner of each blocking plate is away from each other, the purpose of opening the blocking device is achieved, and the soft tube is inserted conveniently; meanwhile, when not in use, the locking sleeve is released, the third corner of each blocking plate is moved to each other, and the dustproof purpose of the quick coupling when not in use is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is a front view structure schematic view of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic view of the driving body and the threaded sleeve seat inside in the utility model;

[0019] Figure 4 It is a three-dimensional structure schematic view of the driving body and the threaded sleeve seat inside in the utility model;

[0020] Figure 5 It is a three-dimensional structure schematic view of the threaded sleeve seat and the threaded plug separation state in the utility model;

[0021] Figure 6 It is a three-dimensional structure schematic view of the driving body inside in the utility model;

[0022] Figure 7 It is a three-dimensional structure schematic view of the spring sheet in the utility model;

[0023] Figure 8 It is the internal structure schematic view of the locking sleeve in the utility model;

[0024] Figure 9 It is the three-dimensional structure schematic view of the cylinder in the utility model;

[0025] Figure 10 It is the three-dimensional structure schematic view of the limiting pin in the utility model;

[0026] Figure 11 It is the three-dimensional structure schematic view of the plugging plate in the utility model;

[0027] Figure 12 It is the three-dimensional structure schematic view of the locking ring in the utility model;

[0028] Figure 13 It is the front view structure schematic view of the locking ring in the utility model;

[0029] Figure 14 It is the three-dimensional structure schematic view of the driving body and the threaded column inside in the utility model.

[0030] In the drawing, 1, the body; 2, the cover; 3, the thermal printer; 4, USB jack; 5, 220V power interface; 6, power switch; 7, touch control screen; 8, threaded sleeve seat; 9, butt joint; 10, driving body; 11, threaded column; 12, through hole; 13, locking sleeve; 14, locking ring; 15, spring piece; 16, conical surface; 17, driving sleeve; 18, sliding cavity; 19, return spring; 20, circular chamber; 21, L rod; 22, inner sleeve; 23, fixed ring; 24, driving ring; 25, sliding slot; 26, plugging plate; 27, first angle; 28, second angle; 29, sliding pin; 30, cylinder; 31, threaded groove; 32, limiting pin; 33, third angle; 34, annular plate; 35, threaded plug; 36, filter screen; 37, circular table face. DETAILED DESCRIPTION

[0031] Please refer to Figures 1-14 , the following detailed description of the utility model is made in combination with the drawings and examples:

[0032] The utility model discloses lubricating oil sample detection device, including body 1 and hinged on body 1 cover 2, the upper end surface of body 1 is provided with thermal printer 3, USB jack 4, 220V power supply interface 5, power switch 6 and touch control screen 7, the right side of body 1 is provided with two quick -witted, and the quick -witted is inserted into hose, and one end of another one of hose is inserted into the lubricating oil in sample bottle, as the oil inlet end of detection device, and the other end of another one of hose is inserted into empty bottle, as the discharge end of detection device, and the quick -witted is provided with plugging device, and the plugging device is used for plugging the internal passage of quick -witted when not inserting hose in quick -witted, plays the dustproof effect, and when inserting hose in quick -witted, the passage in quick -witted is opened, and normal use is carried out, when using, test data can be printed output through thermal printer 3, and USB jack 4 can insert U disk and carry out mutual transmission with detection device data, and touch control screen 7 operates detection device.

[0033] When using the device, first, insert the hose into the two quick couplings, the plugging device in the quick coupling automatically opens, without affecting the communication of the hose and the quick coupling, then insert the outer end of the oil inlet hose into the lubricating oil in the sample bottle, and insert the outer end of the discharge hose into the empty bottle; press the power switch 6 to start, enter the sample selection option on the interface of the touch control screen 7, modify the sample volume, automatically sample, the working principle is that the pump device in the body 1 draws the lubricating oil in the sample bottle into the detection device through the quick coupling and the hose for detection; after the detection is completed, enter the emptying and cleaning option on the interface of the touch control screen 7, when emptying, the inlet and outlet ports of the pump device are exchanged in sequence, the outer end of the original oil inlet hose is drawn out from the sample bottle and inserted into the empty bottle, the residual liquid in the collection device, and the original discharge hose is drawn out from the empty bottle and suspended; the original oil inlet hose no longer discharges liquid, representing that the residual liquid in the device is emptied; then use petroleum ether for cleaning, insert the oil inlet hose into the container containing petroleum ether, insert the discharge end into the empty bottle, then use the sample selection option on the interface of the touch control screen 7 for cleaning, suck in 40-50ML petroleum ether reagent, which can effectively dissolve oil liquid and can clean the pipeline; then perform the above emptying and cleaning function to empty the petroleum ether; pull out the hose of the quick coupling, the plugging device plugs the internal passage of the quick coupling to prevent dust in the air from entering the interior of the body 1 through the quick coupling; the whole test process is completed.

[0034] In the embodiment, the quick connector comprises a threaded sleeve 8 fixedly arranged on the right side of the body 1, and a connector assembly threadedly connected in the threaded sleeve 8, the threaded sleeve 8 is provided with a counter connector 9, the connector assembly is provided with a locking mechanism, and the sealing device is arranged on the left side of the locking mechanism in the connector assembly; in use, the locking mechanism is opened, the hose is inserted into the locking mechanism, the locking mechanism is opened at the same time to drive the sealing device to open, the left end of the hose passes through the locking mechanism and the sealing device to be connected with the counter connector 9 to realize sealed connection; then the locking mechanism is closed to lock the position of the hose in the left-right direction, the locking mechanism is closed at the same time to tighten the hose by the sealing device, the hose is further locked, and the stability of the hose connection is improved.

[0035] In the embodiment, the connector assembly comprises a hollow driving body 10, a threaded column 11 is fixedly arranged on the left end of the driving body 10, a through hole 12 in communication with the inside of the driving body 10 is formed in the inside of the threaded column 11, the threaded column 11 is threadedly connected with the threaded sleeve 8, the locking mechanism comprises a locking sleeve 13 slidably arranged in the driving body 10 along the left-right direction, and a locking ring 14 fixedly arranged in the inside of the driving body 10 and located on the left side of the locking sleeve 13, a plurality of spring sheets 15 are uniformly fixedly arranged on the left side of the locking ring 14 along the circumferential direction, the inner end of each spring sheet 15 is inwardly contracted, and a tapered surface 16 is formed on the left end of the locking sleeve 13; in use, the hose is inserted into the locking sleeve 13 from the outer end of the locking sleeve 13 and passes through the space surrounded by the inner end of each spring sheet 15, the inner end of each spring sheet 15 abuts against the outer side of the hose, until the left end of the hose passes through the sealing device and moves to the left to be connected with the counter connector 9 to realize sealed connection, at this time, the outer surface of the hose cannot move to the right because of the abutment of the inner end of each spring sheet 15, so that the hose is fixed and sealed with the counter connector 9; if the hose needs to be pulled out, the locking sleeve 13 is pressed into the driving body 10, so that the left end of the locking sleeve 13 drives each spring sheet 15 to expand outward along the radial direction through the tapered surface 16, so that the inner end of the spring sheet 15 is separated from the outer side of the hose, at this time, the hose can be pulled out to the right; the material of the hose meets the requirement that the hose can be bent at will, but the cross-sectional area of the hose does not lose the whole circular structure, in other words, the hose cannot be crushed.

[0036] The outer surface of the locking sleeve 13 is fixedly provided with a driving sleeve 17, the inside of the driving body 10 is provided with a sliding cavity 18, the driving sleeve 17 is slidingly arranged in the sliding cavity 18 of the driving body 10 along the left-right direction; the left end of the driving sleeve 17 and the inner side wall of the sliding cavity 18 are fixedly provided with a reset spring 19; the reset spring 19 always drives the locking sleeve 13 to move rightward through the driving sleeve 17, the left end of the locking sleeve 13 is separated from the spring sheet 15, so that the inner end of the spring sheet 15 is in a natural inwardly retracted state, the left side of the inside of the driving body 10 is provided with a circular chamber 20 for accommodating the plugging device, the outer side of the driving sleeve 17 is fixedly provided with an L-shaped rod 21, the left end of the L-shaped rod 21 is located in the circular chamber 20 and connected with the plugging device, the L-shaped rod 21 is slidingly arranged in the driving body 10 along the left-right direction; in use, first press the locking sleeve 13, the locking sleeve 13 drives the L-shaped rod 21 to move leftward through the driving sleeve 17, the L-shaped rod 21 drives the plugging device to open by moving leftward, then insert the hose into the locking sleeve 13 and pass through the inner end of each spring sheet 15 and the plugging device to be connected with the butt joint 9, then stop pressing the locking sleeve 13, the locking sleeve 13 moves rightward under the pushing of the reset spring 19, the left end of the locking sleeve 13 is away from the spring sheet 15, the inner end of the spring sheet 15 is inwardly retracted to tightly clamp the hose, the locking sleeve 13 moves rightward at the same time to drive the plugging device to close through the driving sleeve 17 and the L-shaped rod 21, but the plugging device will not be completely closed due to the existence of the hose, but forms a clamping effect on the hose; the fixing effect of the hose is improved, when the hose is pulled out, first press the locking sleeve 13 to move leftward, so that the plugging device is opened, at the same time, the left end of the locking sleeve 13 drives the inner end of each spring sheet 15 to expand outward, then the hose can be pulled out, the hose is pulled out, the locking sleeve 13 is released, the locking sleeve 13 moves rightward under the pushing of the reset spring 19, the locking sleeve 13 drives the plugging device to close through the driving sleeve 17 and the L-shaped rod 21, so as to play a dustproof role.

[0037] In the embodiment, the inner wall of the driving sleeve 17 is fixedly embedded with an inner sleeve 22, the right side surface of the inner sleeve 22 is provided with a fixing groove, and the locking ring 14 is located in the fixing groove and fixedly arranged with the inner sleeve 22; the plugging device comprises a fixed ring 23 fixedly arranged at the left end of the inner sleeve 22 and a driving ring 24 rotationally connected to the outer surface of the fixed ring 23, the left side surface of the driving ring 24 is provided with a plurality of sliding grooves 25, the left side surface of the fixed ring 23 is hingedly connected with a plurality of plugging plates 26, the plugging plate 26 comprises three corners, the plugging plate 26 is hingedly connected with the fixed ring 23 through a first corner 27, and the second corner 28 of the plugging plate 26 is fixedly provided with a sliding pin 29 located in the sliding groove 25; the left side surface of the driving ring 24 is fixedly provided with a cylinder 30, the outer surface of the cylinder 30 is provided with a threaded groove 31, and the left end of the L-shaped rod 21 is fixedly provided with a limiting pin 32 located in the threaded groove 31; when the locking sleeve 13 is pressed, the locking sleeve 13 moves to the left to drive the driving sleeve 17 to move to the left, the driving sleeve 17 drives the L-shaped rod 21 to move to the left, the L-shaped rod 21 moves to the left to drive the driving ring 24 to rotate counterclockwise by cooperation of the limiting pin 32 and the threaded groove 31 of the cylinder 30; when the driving ring 24 rotates counterclockwise, the driving ring 24 drives the second corner 28 of the plugging plate 26 to rotate outward around the first corner 27 through cooperation of the sliding groove 25 and the sliding pin 29, so that the third corner 33 of each plugging plate 26 moves away from each other, and the purpose of opening the plugging device is achieved; the locking sleeve 13 is released, and the locking sleeve 13 moves to the right under the pushing of the reset spring 19, and the locking sleeve 13 moves to the right to drive the cylinder 30 and the driving ring 24 to rotate clockwise in sequence through the driving sleeve 17, the L-shaped rod 21 and the limiting pin 32, when the driving ring 24 rotates clockwise, the driving ring 24 drives the second corner 28 of the plugging plate 26 to rotate inward around the first corner 27 through the sliding groove 25, so that the third corner 33 of each plugging plate 26 moves to each other until each plugging plate 26 is folded and closely attached to each other to form a complete circle (not including the first corner 27 and the second corner 28 of the plugging plate 26), the fixed ring 23 is sealed, and the purpose of dustproof of the quick connector when not in use is achieved.

[0038] In the embodiment, the left side surface of the fixed ring 23 is fixedly arranged with the threaded column 11, and the left side surface of the driving body 10 is fixedly arranged with the threaded column 11 through the annular plate 34, and the annular plate 34 improves the stability of the fixation of the threaded column 11 and the driving body 10.

[0039] In the embodiment, the connector 9 comprises a threaded plug 35, an inner hole is coaxially formed in the threaded plug 35, a filter screen 36 is fixedly arranged at the left side of the inner hole of the threaded plug 35, a circular table surface 37 is formed at the right side of the inner hole of the threaded plug 35, and a hexagonal socket is formed at the inner hole of the threaded plug 35 at the right side of the filter screen 36; during assembly, the threaded sleeve 8 and the body 1 are fixed in advance, a hexagonal socket wrench is inserted into the hexagonal socket of the threaded plug 35, then the threaded plug 35 is screwed into the threaded sleeve 8, and then the threaded column 11 is screwed into the threaded sleeve 8 by the handheld driving body 10, so that the assembly of the threaded sleeve 8 and the connector is completed.

[0040] The working principle of the utility model is as follows: during use, firstly, the locking sleeve 13 is pressed, the locking sleeve 13 drives the L-shaped rod 21 to move leftwards through the driving sleeve 17, the L-shaped rod 21 moves leftwards to push the cylinder 30 and the driving ring 24 to rotate counterclockwise (taking Figure 11 the inner hole of the fixed ring 23 is opened, then the hose is inserted into the locking sleeve 13 and is in contact with the circular table surface 37 of the threaded plug 35 through the inner end of each spring sheet 15 and the inner hole of the fixed ring 23, so that sealing connection is realized, then the locking sleeve 13 is released, the locking sleeve 13 moves rightwards under the pushing of the reset spring 19, the left end of the locking sleeve 13 is away from the spring sheet 15, the inner end of the spring sheet 15 is contracted inwards to clamp the hose, the locking sleeve 13 moves rightwards to drive the cylinder 30 and the driving ring 24 to rotate clockwise through the driving sleeve 17 and the L-shaped rod 21, the driving ring 24 drives each blocking plate 26 to rotate inwards with the first angle 27 as the axis, when each blocking plate 26 is in contact with the outer surface of the hose, the locking sleeve 13 stops moving rightwards, the blocking plate 26 clamps the hose, and the stability of the hose is improved; when the hose is pulled out, firstly, the locking sleeve 13 is pressed to move leftwards, the locking sleeve 13 drives each blocking plate 26 to rotate outwards with the first angle 27 as the axis through the driving sleeve 17, the L-shaped rod 21, the limiting pin 32, the cylinder 30 and the driving ring 24, the clamping of the hose is released, meanwhile, the left end of the locking sleeve 13 drives the inner end of each spring sheet 15 to expand outwards, then the hose can be pulled out, when the hose is pulled out, the pressing of the locking sleeve 13 is stopped, the locking sleeve 13 moves rightwards under the pushing of the reset spring 19, the locking sleeve 13 drives each blocking plate 26 to rotate inwards with the first angle 27 as the axis through the driving sleeve 17, the L-shaped rod 21, the limiting pin 32, the cylinder 30 and the driving ring 24, until each blocking plate 26 is spliced together, the inner hole of the fixed ring 23 is blocked, and the effect of dust prevention is achieved.

Claims

1. A lubricating oil sample detection device, characterized by: The utility model relates to a lubricating oil detection device, including the body (1) and the cover (2) articulated on the body (1), the right side of body (1) is provided with two quick -witted joint, the quick -witted joint inserts the hose, one end of one hose is inserted into the lubricating oil in sample bottle, and the other end is inserted into the empty bottle as the oil inlet end of detection device, the other end of another hose is inserted into the empty bottle as the discharge end of detection device, the quick -witted joint is provided with the plugging device, and the plugging device is used to when not inserting the hose in the quick -witted joint the internal passage of quick -witted joint is blocked, and when inserting the hose in the quick -witted joint the internal passage of quick -witted joint is opened.

2. The lubricating oil sample detection device of claim 1, wherein: The quick -witted joint includes the threaded sleeve (8) fixedly arranged on the right side of the body (1), and the connector assembly is screwed in the threaded sleeve (8), the threaded sleeve (8) is provided with the butt joint (9), the locking mechanism is arranged in the connector assembly, and the plugging device is arranged on the left side of the locking mechanism in the connector assembly.

3. The lubricating oil sample detection device of claim 2, wherein: The connector assembly includes the hollow drive body (10), the left end of the drive body (10) is fixedly provided with the threaded column (11), the inside of the threaded column (11) is provided with the through hole (12) communicated with the inside of the drive body (10), the threaded column (11) is screwed with the threaded sleeve (8), the locking mechanism includes the locking sleeve (13) slidably arranged in the right end of the drive body (10) in the left-right direction, and the locking ring (14) is fixedly arranged in the drive body (10) and located on the left side of the locking sleeve (13), the left side of the locking ring (14) is uniformly fixedly provided with a plurality of spring leaves (15) in the circumferential direction, the inner end of each spring leaf (15) is inwardly retracted, and the left end of the locking sleeve (13) is provided with a tapered surface (16).

4. The lubricating oil sample detection device of claim 3, wherein: The outer surface of the locking sleeve (13) is fixedly provided with the driving sleeve (17), the inside of the drive body (10) is provided with the sliding cavity (18), and the driving sleeve (17) is slidably arranged in the sliding cavity (18) of the drive body (10); the left end of the driving sleeve (17) and the inner side wall of the sliding cavity (18) are fixedly provided with the reset spring (19); the reset spring (19) always drives the locking sleeve (13) to move right through the driving sleeve (17); the left side of the inside of the drive body (10) is provided with a circular chamber (20) for accommodating the plugging device, the outer side of the driving sleeve (17) is fixedly provided with the L rod (21), the left end of the L rod (21) is located in the circular chamber (20) and connected with the plugging device, and the L rod (21) is slidably arranged in the drive body (10) in the left-right direction.

5. The lubricating oil sample detection device of claim 4, wherein: The inner wall of the driving sleeve (17) is fixedly embedded with an inner sleeve (22), a fixing groove is formed in the right side surface of the inner sleeve (22), the locking ring (14) is located in the fixing groove and is fixedly arranged with the inner sleeve (22); the plugging device comprises a fixing ring (23) fixedly arranged at the left end of the inner sleeve (22) and a driving ring (24) rotationally connected to the outer surface of the fixing ring (23), a plurality of sliding grooves (25) are formed in the left side surface of the driving ring (24), a plurality of plugging plates (26) are hingedly connected to the left side surface of the fixing ring (23), the plugging plate (26) comprises three corners, the plugging plate (26) is hingedly connected to the fixing ring (23) through a first corner (27), a sliding pin (29) located in the sliding groove (25) is fixedly arranged at a second corner (28) of the plugging plate (26); a cylinder (30) is fixedly arranged at the left side surface of the driving ring (24), a threaded groove (31) is formed in the outer surface of the cylinder (30), a limiting pin (32) is fixedly arranged at the left end of the L-shaped rod (21), and the limiting pin (32) is located in the threaded groove (31).

6. The lubricating oil sample detection device of claim 5, wherein: The left side surface of the fixing ring (23) is fixedly arranged with the threaded column (11), and the left side surface of the driving body (10) is fixedly arranged with the threaded column (11) through the annular plate (34).

7. The lubricating oil sample detection device of claim 2, wherein: The butt joint (9) comprises a threaded plug (35), an inner hole is coaxially formed in the threaded plug (35), a filter screen (36) is fixedly arranged at the left side of the inner hole of the threaded plug (35), a circular table face (37) is formed at the right side of the inner hole of the threaded plug (35), and the inner hole of the threaded plug (35) at the right side of the filter screen (36) is of an inner hexagonal structure.

8. The lubricating oil sample detection device of claim 1, wherein: The upper end surface of the body (1) is provided with a thermal printer (3), a USB jack (4), a 220V power supply interface (5), a power switch (6) and a touch control screen (7).

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