A detection device and detection method for temperature and viscosity of mineral oil

Abstract

The present invention relates to the technical field of oil viscosity detection, and in particular to a device and method for detecting the temperature and viscosity of mineral oil. A device for detecting the temperature and viscosity of mineral oil, comprising a detection platform, a vertical frame, a water bath, a heater, a mounting plate, a U-shaped test tube, an upper cavity, a lower cavity, etc.; a water bath with a built-in heater is arranged on the left side of the detection platform, a vertical frame is connected to the middle of the detection platform, a mounting plate is connected to the water bath, a liquid adding nozzle is provided on the mounting plate and connected to a U-shaped test tube, and a pipe on one side of the U-shaped test tube is sequentially connected to an upper cavity and a lower cavity from top to bottom. The present invention can rotate the telescopic tube to make the screw screw downward, thereby pushing the piston to inflate the air cylinder, thereby expanding the annular airbag, and then adjusting the size of the through hole in the middle of the annular airbag to meet the testing requirements of different apertures.

Description

Technical Field

[0001] The present invention relates to the technical field of oil viscosity detection, and in particular to a device and method for detecting temperature and viscosity of mineral oil. Background Art

[0002] Mineral oil refers to a mixture of refined liquid hydrocarbons obtained from petroleum. Crude oil is obtained by atmospheric and vacuum distillation, solvent extraction and dewaxing, and hydrofining. Mineral oil includes mineral hydrocarbons such as light and heavy fuel oils, lubricating oils, and cooling oils. Mineral oil can float on the surface of water, affecting the exchange of oxygen at the interface between air and water. It can also be dispersed in water, adsorbed on suspended particles, or exist in water in an emulsified state. The oil is oxidized and decomposed by microorganisms in the water, consuming dissolved oxygen in the water and deteriorating the water quality. Therefore, the viscosity of mineral oil needs to be tested.

[0003] At present, the temperature and viscosity instrument of mineral oil uses water heating to raise the temperature of mineral oil. In this process, the mineral oil is filled in a special glass container with two inlets and outlets of different sizes. Then, the mineral oil in the container is heated by water to achieve temperature control. A leather tube is manually inserted into the smaller container port, and the other end of the leather tube is connected to an annular airbag. The annular airbag is manually squeezed to draw the mineral oil upward. After the annular airbag is fully returned to its position, it is observed whether the mineral oil flows to the specified position within the specified time to obtain the viscosity of the mineral oil. Whether it is qualified and the test is completed, in the mineral oil test, for high viscosity or low viscosity mineral oil, it is necessary to select capillary viscometers with different tube diameters. For example, for extremely high viscosity oils, a larger diameter capillary is required to ensure that the sample can pass smoothly, and for low viscosity oils, a smaller diameter capillary is selected to improve the measurement accuracy. Therefore, it is necessary to replace capillary test containers of different diameters according to the sample situation. However, the existing containers cannot adjust the diameter of the container pipeline, resulting in the need to replace the test container during the test, which is more troublesome to operate. Summary of the invention

[0004] In order to overcome the disadvantage that the existing mineral oil viscosity test container cannot adjust the container pipe diameter, resulting in the need to replace the test container during testing, the present invention provides a device and method for detecting the temperature and viscosity of mineral oil.

[0005] The technical implementation scheme of the present invention is: a device for detecting temperature and viscosity of mineral oil, comprising a detection platform, a vertical frame, a water bath, a heater, a mounting plate, a U-shaped test tube, an upper cavity, a lower cavity, an upper scale ruler, a lower scale ruler, an air cylinder, a cylinder cover, a piston, a screw, a telescopic tube, an adjustment box and an annular air bag, a water bath with a built-in heater is arranged on the left side of the detection platform, a vertical frame is connected to the middle part of the detection platform, a mounting plate is connected to the water bath, a liquid adding nozzle is opened on the mounting plate and connected to a U-shaped test tube, and a pipe on one side of the U-shaped test tube is connected to the upper cavity and the lower cavity in sequence from top to bottom The upper part of the upper cavity is connected to the outside of the mounting plate through an air inlet pipe, an upper scale scale is provided on the outer wall of the lower part of the upper cavity, and a lower scale scale is provided on the outer wall of the lower part of the lower cavity. The side wall of the upper cavity is connected with an air cylinder, a cylinder cover is installed on the upper end of the air cylinder, a piston is slidably connected in the air cylinder, a screw is connected to the upper part of the piston, the screw is threadedly connected to the cylinder cover, the upper end of the screw is connected with a telescopic tube, the telescopic tube is rotatably connected to the mounting plate, the lower part of the lower cavity is connected with an adjusting box, the lower end of the air cylinder is connected with an annular airbag, and the annular airbag is horizontally installed in the adjusting box.

[0006] Preferably, the device also includes a sleeve, a support plate, a rubber tube, a motor, a connecting rod, a gear box and a transmission shaft. A support plate is connected between the left and right side walls of the upper part of the vertical frame, a motor is installed on the top of the vertical frame, the support plate is rotatably connected to the transmission shaft, connecting rods are connected at both ends of the transmission shaft, a sleeve is connected to the upper end of the connecting rod, the output shaft of the motor is connected to the transmission shaft through a gear box and transmits, and the front end of the sleeve is connected to a rubber tube for sleeved on the intake pipe.

[0007] Preferably, the device also includes a limiting plate, a push plate, a spring, a sliding rod, a pulling rod and a round table. The front end of the sleeve is connected to the limiting plate, and the rear end is slidably sleeved with the push plate. A spring is connected between the push plate and the sleeve. The front end surface of the push plate is evenly connected to the sliding rod in the circumferential direction. The limiting plate is provided with a sliding groove, and the pulling rod is slidably connected in the sliding groove. The front end surface of the push plate is connected to a round table that is extruded and fitted with the rear end of the pulling rod, and the pulling rod is connected to the outer wall of the rubber tube.

[0008] Preferably, the device further comprises an air pump and an air pipe, the air pump is mounted on the vertical frame, the air pump is connected to the air pipe, and the air pipe is provided with an exhaust hole.

[0009] Preferably, the device further comprises a cylinder and a U-shaped blocking rod, the cylinder is mounted on the vertical frame, the telescopic shaft of the cylinder is connected to the U-shaped blocking rod, and the U-shaped blocking rod is slidably inserted into the exhaust hole.

[0010] Preferably, the device further comprises a water tank, and the water tank is arranged on the detection table at the rear side of the vertical frame.

[0011] Preferably, the device further comprises a water pump and a water pipe. The water pump is installed at the bottom of the detection platform. The water pump is connected to a water pipe, and the water pipe is connected to the water bath and the water storage tank.

[0012] A method for detecting temperature and viscosity of mineral oil, based on a device for detecting temperature and viscosity of mineral oil, comprises the following steps:

[0013] Step 1: First, add the mineral oil of the viscosity to be tested into the U-shaped test tube, add water into the water bath, and heat the mineral oil in the U-shaped test tube with a heater to maintain the required temperature of the mineral oil during the test;

[0014] Step 2: Rotate the telescopic tube to make the screw spin downward, thereby pushing the piston to inflate the air cylinder, thereby expanding the annular airbag, and then adjusting the size of the through hole in the middle of the annular airbag to meet the test requirements of different apertures;

[0015] Step 3: Control the motor to rotate, and then drive the connecting rod to rotate counterclockwise through the gear box, and then rotate the rubber tube toward the air inlet pipe, so that the sliding rod contacts the upper end surface of the mounting plate, and then the push plate and the round table move backward, and then the pull rod slides along the inner end of the slide groove under the elastic reset of the rubber tube, and then the rubber tube is automatically sleeved on the air inlet pipe, completing the connection of the gas pipeline;

[0016] Step 4: Use an air pump to lift the mineral oil in the U-shaped test tube into the upper cavity, and then drive the U-shaped plugging rod to withdraw from the exhaust hole of the gas pipe through the drive of the cylinder to achieve air release and pressure relief. The mineral oil falls back under the action of gravity, and the timing is started and stopped when the mineral oil level drops to the upper and lower scales, respectively, to obtain the falling time of the mineral oil between the scales, and then combined with the viscosity parameters, the viscosity of the mineral oil is calculated.

[0017] The present invention has the following advantages: the present invention can rotate the telescopic tube to make the screw screw out downward, thereby pushing the piston to inflate the air in the air cylinder, thereby expanding the annular airbag, and adjusting the size of the through hole in the middle of the annular airbag to meet the testing requirements of different apertures; by controlling the rotation of the motor and the transmission of the gear box, the connecting rod is rotated counterclockwise, and the rubber tube is rotated to the top of the air intake pipe, and the sliding rod at the front end of the push plate first contacts and squeezes the upper end surface of the mounting plate, and then the push plate and the round table slide along the slide groove toward the rear end of the sleeve, and then the pull rod slides along the inner end of the slide groove under the elastic reset of the rubber tube, and then the rubber tube is automatically fitted and clamped on the air intake pipe, so as to quickly complete the connection of the gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the water bath and the mounting plate of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the U-shaped test tube and the air intake pipe and other components of the present invention;

[0021] Figure 4 It is a cross-sectional structural diagram of the upper cavity, the lower cavity, the upper scale ruler and the lower scale ruler of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the supporting plate, rubber tube, motor and other components of the present invention;

[0023] Figure 6 It is a connection diagram of the connecting rod, the gear box and the transmission shaft of the present invention;

[0024] Figure 7 It is a schematic diagram of the connection between the rubber tube and the pull rod of the present invention;

[0025] Figure 8 It is a schematic diagram of the assembly of the limit plate and the push plate of the present invention;

[0026] Fig. 9 This is a structural schematic diagram of the round table of the present invention, with a push plate slidably sleeved at the rear end;

[0027] Fig.10 It is a schematic diagram of the structure of the air pump and the air delivery pipe of the present invention;

[0028] Fig.11 It is a structural schematic diagram of the cylinder and the U-shaped blocking rod of the present invention;

[0029] Fig.12 It is a schematic diagram of the installation of the water storage tank of the present invention;

[0030] Fig.13 It is a schematic diagram of the installation of the water pump and water pipe of the present invention.

[0031] The above drawings include the following reference numerals: 1-testing table, 2-air cylinder, 20-cylinder cover, 3-vertical frame, 7-water storage tank, 101-water bath, 102-mounting plate, 103-U-shaped test tube, 1031-liquid adding nozzle, 104-heater, 105-upper cavity, 106-lower cavity, 107-upper scale ruler, 108-lower scale ruler, 109-inlet pipe, 201-piston, 202-screw, 203-telescopic tube, 204-adjustment Section box, 205-annular airbag, 300-sleeve, 301-support plate, 302-rubber tube, 303-motor, 304-connecting rod, 305-gear box, 306-transmission shaft, 4-push plate, 40-limit plate, 41-spring, 401-slide bar, 402-pull rod, 403-slide groove, 404-round table, 5-air pump, 501-air pipe, 6-cylinder, 601-U-shaped blocking rod, 602-exhaust hole, 701-water pump, 702-water pipe. DETAILED DESCRIPTION

[0032] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0033] Embodiment 1: A device for detecting temperature and viscosity of mineral oil, such as Figure 1-Figure 4As shown, it includes a test bench 1, a frame 3, a water bath 101, a heater 104, a mounting plate 102, a U-shaped test tube 103, an upper cavity 105, a lower cavity 106, an upper scale 107, a lower scale 108, an air cylinder 2, a cylinder cover 20, a piston 201, a screw 202, a telescopic tube 203, an adjustment box 204 and an annular air bag 205. The left part of the test bench 1 is provided with a water bath 101 with a built-in heater 104, the middle part of the test bench 1 is connected to the frame 3, the water bath 101 is connected to the mounting plate 102, and the mounting plate 102 is connected to a handle for facilitating the removal of the U-shaped test tube 103 from the water bath 101. The mounting plate 102 is provided with a liquid adding nozzle 1031 and is connected with a U-shaped test tube 103. A pipe on one side of the U-shaped test tube 103 is connected with an upper cavity 105 and a lower cavity 106 in sequence from top to bottom. The upper part of the upper cavity 105 is connected to the outside of the mounting plate 102 through an air inlet pipe 109. An upper scale scale 107 is provided on the lower outer wall of the upper cavity 105, and a lower scale scale 108 is provided on the lower outer wall of the lower cavity 106. The side wall of the upper cavity 105 is connected with an air cylinder 2. A cylinder cover 20 is installed on the upper end of the air cylinder 2. A piston 201 is slidably connected inside the air cylinder 2. A screw 202 is connected to the upper part of the piston 201. The screw 202 The cylinder 20 is threadedly connected to the cylinder cover 20, the upper end of the screw rod 202 is connected to a telescopic tube 203, the telescopic tube 203 is rotatably connected to the mounting plate 102, the lower part of the lower cavity 106 is connected to an adjustment box 204, the lower end of the cylinder 2 is connected to an annular airbag 205, and the annular airbag 205 is horizontally installed in the adjustment box 204; when testing the viscosity of mineral oil, first add mineral oil to the U-shaped test tube 103 from the liquid adding nozzle 1031, add water to the water bath 101 to heat the mineral oil in the U-shaped test tube 103 in a water bath, adjust the temperature to a preset value through the heater 104, connect the air inlet pipe 109 to the suction pump to transfer the U-shaped test tube 1 03, the mineral oil is lifted to the upper cavity 105, and then the suction pump is disconnected. The mineral oil falls back under the action of gravity, and the timing is started and stopped when the mineral oil level drops to the upper scale 107 and the lower scale 108, respectively, to obtain the falling time of the mineral oil between the scales, and then combined with the viscosity parameter, the viscosity of the mineral oil is calculated. When it is necessary to test the viscosity of the mineral oil with different pipe diameters, the telescopic tube 203 can be rotated to make the screw 202 rotate downward, and then the piston 201 is pushed to inflate the air cylinder 2, thereby expanding the annular airbag 205, and then adjusting the size of the through hole in the middle of the annular airbag 205 to meet the testing requirements of different apertures.

[0034] like Figure 5 and Figure 6As shown, the device also includes a sleeve 300, a support plate 301, a rubber tube 302, a motor 303, a connecting rod 304, a gear box 305 and a transmission shaft 306. The support plate 301 is connected between the left and right side walls of the upper part of the vertical frame 3. The motor 303 is installed on the top of the vertical frame 3. The support plate 301 is rotatably connected to the transmission shaft 306. The two ends of the transmission shaft 306 are connected to the connecting rod 304. The upper end of the connecting rod 304 is connected to the sleeve 300. The output shaft of the motor 303 is connected through the gear The box 305 is connected to the transmission shaft 306 and transmits power. The front end of the sleeve 300 is connected to a rubber tube 302 for sleeved on the intake pipe 109. The motor 303 rotates, and then the connecting rod 304 rotates counterclockwise through the gear box 305, so that the rubber tube 302 can be rotated toward the intake pipe 109. The rubber tube 302 can be manually stretched to sleeve and connect the rubber tube 302 and the intake pipe 109. The rubber tube 302 can be loosened to tighten the intake pipe 109 to complete the connection of the gas pipeline.

[0035] Embodiment 2: Based on embodiment 1, Figure 7-Figure 9 As shown, the device also includes a limit plate 40, a spring 41, a push plate 4, a slide bar 401, a pull rod 402 and a round table 404. The front end of the sleeve 300 is connected to the limit plate 40, and the rear end is slidably sleeved with the push plate 4. A spring 41 is connected between the push plate 4 and the sleeve 300. The front end surface of the push plate 4 is evenly connected with the slide bar 401 in the circumferential direction. The deformation of the rubber tube 302 can drive the pull rod 402 to slide in the slide groove 403. The limit plate 40 is provided with a slide groove 403, and the pull rod 402 is slidably connected in the slide groove 403. The limit plate 40 limits and guides the movement of the slide bar 401 and the pull rod 402. The front end surface of the push plate 4 is connected to a round table 404 that is squeezed and matched with the rear end of the pull rod 402. The pull rod 402 is connected to the outer wall of the rubber tube 302 Connect; initially, the push plate 4, under the action of the spring 41, drives the round table 404 forward along the sleeve 300 and squeezes and cooperates with the rear end of the pull rod 402, so that the pull rod 402 slides outward along the slide groove 403, thereby opening the rubber tube 302. When the motor 303 rotates, it will transmit the connecting rod 304 counterclockwise through the gear box 305, thereby rotating the rubber tube 302 to the top of the intake pipe 109. The slide bar 401 at the front end of the push plate 4 first contacts and squeezes the upper end surface of the mounting plate 102, thereby causing the push plate 4 and the round table 404 to slide along the slide groove 403 toward the rear end of the sleeve 300. The round table 404 and the rear end of the pull rod 402 are no longer squeezed, thereby causing the pull rod 402 to slide along the inner end of the slide groove 403 under the elastic reset of the rubber tube 302, thereby causing the rubber tube 302 to automatically fit and be clamped on the intake pipe 109.

[0036] like Fig.10 and Fig.11As shown, the device also includes an air pump 5 and an air pipe 501. The air pump 5 is installed on the vertical frame 3, and the air pump 5 is connected to the air pipe 501. The air pipe 501 is provided with an exhaust hole 602; the device also includes a cylinder 6 and a U-shaped blocking rod 601. The cylinder 6 is installed on the vertical frame 3, and the telescopic axis of the cylinder 6 is connected to the U-shaped blocking rod 601, and the U-shaped blocking rod 601 is slidably inserted into the exhaust hole 602; compressed air is generated and delivered by the air pump 5, and transmitted to the rubber tube 302 through the air pipe 501. At the same time, the U-shaped blocking rod 601 is driven by the cylinder 6 to control the opening and closing of the exhaust hole 602, thereby realizing the inflation and deflation of the U-shaped test tube 103.

[0037] like Fig.12 and Fig.13 As shown, the device also includes a water tank 7, and the water tank 7 is arranged on the test bench 1 on the rear side of the vertical frame 3; the device also includes a water pump 701 and a water pipe 702, and the water pump 701 is installed at the bottom of the test bench 1, and the water pump 701 is connected to the water pipe 702, and the water pipe 702 is connected to the water bath 101 and the water tank 7; when it is necessary to test the viscosity of the mineral oil under certain temperature conditions, the water in the water tank 7 is extracted through the water pump 701 and the water pipe 702, and the water is transported to the water bath 101 for testing operations; when the mineral oil in the water bath 101 does not need to be heated in a water bath, the water in the water bath 101 is returned to the water tank 7 through the water pipe 702, thereby improving the flexibility of the device.

[0038] A method for detecting temperature and viscosity of mineral oil, based on a device for detecting temperature and viscosity of mineral oil, comprises the following steps:

[0039] Step 1: first add the mineral oil of the viscosity to be tested into the U-shaped test tube 103, add water into the water bath 101 and heat the mineral oil in the U-shaped test tube 103 by the heater 104 to maintain the required temperature of the mineral oil during the test;

[0040] Step 2: The screw 202 is screwed downward by rotating the telescopic tube 203, thereby pushing the piston 201 to inflate the air in the air cylinder 2, thereby expanding the annular airbag 205, and adjusting the size of the through hole in the middle of the annular airbag 205 to meet the test requirements of different apertures;

[0041] Step 3: Control the motor 303 to rotate, and then transmit the gear box 305 to make the connecting rod 304 rotate counterclockwise, and then rotate the rubber tube 302 toward the air inlet pipe 109, so that the sliding rod 401 contacts the upper end surface of the mounting plate 102, and then the push plate 4 and the round table 404 move backward, and then the pull rod 402 slides along the inner end of the slide groove 403 under the elastic reset of the rubber tube 302, and then the rubber tube 302 is automatically sleeved on the air inlet pipe 109, completing the connection of the gas pipeline;

[0042] Step 4: Use the air pump 5 to lift the mineral oil in the U-shaped test tube 103 to the upper cavity 105, and then drive the cylinder 6 to withdraw the U-shaped blocking rod 601 from the exhaust hole 602 of the air pipe 501 to achieve air release and pressure relief. The mineral oil falls back under the action of gravity, and the timing is started and stopped when the mineral oil level drops to the upper scale 107 and the lower scale 108, respectively, to obtain the falling time of the mineral oil between the scales, and then combined with the viscosity parameters, the viscosity of the mineral oil is calculated.

[0043] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A device for detecting temperature and viscosity of mineral oil, comprising a detection platform (1), a vertical frame (3), a water bath (101), a heater (104), a mounting plate (102), a U-shaped test tube (103), an upper cavity (105), a lower cavity (106), an upper scale ruler (107) and a lower scale ruler (108), wherein a water bath (101) with a built-in heater (104) is arranged on the left side of the detection platform (1), a vertical frame (3) is connected to the middle of the detection platform (1), and a mounting plate (102) is connected to the water bath (101). 102), the mounting plate (102) is provided with a liquid adding pipe opening (1031) and is connected to a U-shaped test tube (103), a pipe on one side of the U-shaped test tube (103) is connected to an upper cavity (105) and a lower cavity (106) in sequence from top to bottom, the upper portion of the upper cavity (105) is connected to the outside of the mounting plate (102) through an air inlet pipe (109), an upper scale ruler (107) is provided on the lower outer wall of the upper cavity (105), and a lower scale ruler (108) is provided on the lower outer wall of the lower cavity (106), wherein: The invention also comprises an air cylinder (2), a cylinder cover (20), a piston (201), a screw (202), a telescopic tube (203), an adjustment box (204) and an annular air bag (205); the side wall of the upper cavity (105) is connected to the air cylinder (2); the cylinder cover (20) is installed on the upper end of the air cylinder (2); the piston (201) is slidably connected in the air cylinder (2); the upper part of the piston (201) is connected to the screw (202); the screw (202) is threadedly connected to the cylinder cover (20); the upper end of the screw (202) is connected to the telescopic tube (203); the telescopic tube (203) is rotatably connected to the mounting plate (102); the lower part of the lower cavity (106) is connected to the adjustment box (204); the lower end of the air cylinder (2) is connected to the annular air bag (205); the annular air bag (205) is horizontally installed in the adjustment box (204).

2. A device for detecting temperature and viscosity of mineral oil according to claim 1, characterized in that: The device further comprises a sleeve (300), a support plate (301), a rubber tube (302), a motor (303), a connecting rod (304), a gear box (305) and a transmission shaft (306); a support plate (301) is connected between the left and right side walls of the upper part of the vertical frame (3); a motor (303) is installed at the top of the vertical frame (3); the support plate (301) is rotatably connected to the transmission shaft (306); connecting rods (304) are connected at both ends of the transmission shaft (306); the upper end of the connecting rod (304) is connected to the sleeve (300); the output shaft of the motor (303) is connected to the transmission shaft (306) through the gear box (305) and transmits power; the front end of the sleeve (300) is connected to the rubber tube (302) for sleeve-connecting to the air intake pipe (109).

3. A device for detecting temperature and viscosity of mineral oil according to claim 2, characterized in that: The device also includes a limit plate (40), a spring (41), a push plate (4), a sliding rod (401), a pull rod (402) and a round table (404); the front end of the sleeve (300) is connected to the limit plate (40), and the rear end is slidably sleeved with the push plate (4); a spring (41) is connected between the push plate (4) and the sleeve (300); the front end surface of the push plate (4) is evenly connected to the sliding rod (401) in the circumferential direction; the limit plate (40) is provided with a sliding groove (403), and the pull rod (402) is slidably connected in the sliding groove (403); the front end surface of the push plate (4) is connected to a round table (404) that is extruded and matched with the rear end of the pull rod (402); and the pull rod (402) is connected to the outer wall of the rubber tube (302).

4. A device for detecting temperature and viscosity of mineral oil according to claim 3, characterized in that: The device further comprises an air pump (5) and an air pipe (501); the air pump (5) is mounted on the vertical frame (3); the air pump (5) is connected to the air pipe (501); and an exhaust hole (602) is provided on the air pipe (501).

5. A device for detecting temperature and viscosity of mineral oil according to claim 4, characterized in that: The device further comprises a cylinder (6) and a U-shaped blocking rod (601); the cylinder (6) is mounted on the vertical frame (3); the telescopic shaft of the cylinder (6) is connected to the U-shaped blocking rod (601); and the U-shaped blocking rod (601) is slidably inserted into the exhaust hole (602).

6. A device for detecting temperature and viscosity of mineral oil according to claim 5, characterized in that: The device further comprises a water storage tank (7), and the water storage tank (7) is arranged on the detection platform (1) at the rear side of the vertical frame (3).

7. A device for detecting temperature and viscosity of mineral oil according to claim 6, characterized in that: The device further comprises a water pump (701) and a water pipe (702); the water pump (701) is installed at the bottom of the detection platform (1); the water pump (701) is connected to the water pipe (702); and the water pipe (702) is connected to the water bath (101) and the water storage tank (7).

8. A method for detecting temperature and viscosity of mineral oil, based on a device for detecting temperature and viscosity of mineral oil according to any one of claims 5 to 7, characterized in that: The following steps are involved: Step 1: first, add mineral oil of the viscosity to be tested into the U-shaped test tube (103), add water into the water bath (101), and heat the mineral oil in the U-shaped test tube (103) in a water bath through the heater (104) to maintain the mineral oil at the required temperature during the test; Step 2: The screw rod (202) is screwed downward by rotating the telescopic tube (203), thereby pushing the piston (201) to inflate the air cylinder (2), thereby expanding the annular airbag (205), and adjusting the size of the through hole in the middle of the annular airbag (205) to meet the test requirements of different apertures; Step 3: Initially, the push plate (4) drives the round table (404) forward along the sleeve (300) under the action of the spring (41) to squeeze and fit with the rear end of the pull rod (402), so that the pull rod (402) slides outward along the slide groove (403), and then the front end of the pull rod (402) pulls the rubber tube (302) to open. When the motor (303) rotates, it will drive the connecting rod (304) counterclockwise through the gear box (305), and then the rubber tube (302) is rotated to the top of the intake pipe (109). Continuing, the slide bar (401) at the front end of the push plate (4) first contacts and squeezes the upper end surface of the mounting plate (102), thereby causing the push plate (4) and the round table (404) to slide along the slide groove (403) toward the rear end of the sleeve (300), and the round table (404) and the rear end of the pull rod (402) are no longer squeezed, thereby causing the pull rod (402) to slide along the inner end of the slide groove (403) under the elastic reset of the rubber tube (302), thereby causing the rubber tube (302) to automatically fit and clamp onto the air inlet pipe (109), thereby completing the connection of the air pipeline; Step 4: Use an air pump (5) to lift the mineral oil in the U-shaped test tube (103) into the upper cavity (105), and then drive the cylinder (6) to pull the U-shaped plugging rod (601) away from the exhaust hole (602) of the gas pipe (501) to release air and pressure. The mineral oil falls back under the action of gravity, and the timing is started and stopped when the mineral oil level drops to the upper scale (107) and the lower scale (108), respectively, to obtain the falling time of the mineral oil between the scales, and then combined with the viscosity parameters, the viscosity of the mineral oil is calculated.

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