A device and method for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir

Abstract

The present invention relates to the technical field of interfacial tension measurement, and specifically to a device and method for measuring the interfacial tension of multiphase fluids simulating high-temperature reservoirs, which solves the problem that when measuring interfacial tension using a rotating drop interfacial tension meter, only a single sample can be centrifuged for measurement, the measurement efficiency is low, and it is not convenient to replace and observe the sample, and the measurement is easily affected by external interference. A device and method for measuring the interfacial tension of multiphase fluids simulating high-temperature reservoirs, comprising a measurement control mechanism, an observation adjustment mechanism and a centrifugal insulation mechanism, the upper end surface of the measurement control mechanism is equipped with an observation adjustment mechanism, one end of the observation adjustment mechanism is equipped with a centrifugal insulation mechanism, the measurement control mechanism includes a support base, and the centrifugal insulation mechanism includes a thermal insulation mounting cover. The present invention can effectively improve the measurement efficiency by synchronously heating and centrifuging multiple samples, and is convenient for replacing and protecting the samples to prevent external light from interfering with the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of interfacial tension measurement, and in particular to a device and method for measuring the interfacial tension of a simulated high-temperature reservoir multiphase fluid. Background Art

[0002] In the study of tertiary oil recovery technology in oil fields, the spinning drop method is the most widely used method for the experimental operation of interfacial tension analysis and measurement of emulsions, polymers, and surfactants. The spinning drop interfacial tension meter is a common interfacial tension measurement tool among interfacial chemical analysis instruments. It is mainly used to measure the interfacial tension of laboratory samples. Interfacial tension is an important physical quantity that characterizes the interaction force between molecules on the surface of liquids. It is crucial to understand the physical and chemical properties of liquids. The spinning drop interfacial tension meter simulates and analyzes the dynamic behavior of droplets on the interface through the centrifugal force generated by high-speed rotation. By measuring the shape change of the droplets, the interfacial tension of the liquid can be accurately calculated.

[0003] When measuring interfacial tension using a spinning drop interfacial tension meter, only a single sample can be centrifuged for measurement, the measurement efficiency is low, and it is inconvenient to replace and observe the sample, and the measurement is easily affected by external interference; therefore, it does not meet existing needs. In this regard, we propose a device and method for measuring the interfacial tension of multiphase fluids simulating high-temperature reservoirs. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for measuring the interfacial tension of multiphase fluids in simulated high-temperature reservoirs, so as to solve the problems raised in the above background technology that when measuring the interfacial tension using a spinning drop interfacial tension meter, only a single sample can be centrifuged for measurement, the measurement efficiency is low, it is inconvenient to replace and observe the sample, and the measurement is easily affected by external interference.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a device for measuring the interfacial tension of a multiphase fluid in a simulated high-temperature reservoir, comprising a measuring control mechanism, an observation and adjustment mechanism and a centrifugal heat preservation mechanism, wherein the upper end surface of the measuring control mechanism is provided with the observation and adjustment mechanism, one end of the observation and adjustment mechanism is provided with the centrifugal heat preservation mechanism, the measuring control mechanism comprises a supporting base, the upper end surface of the supporting base is fixedly provided with an electrical connection installation box, and the rear end of the upper end surface of the electrical connection installation box is provided with a protective sleeve;

[0006] The centrifugal heat preservation mechanism comprises a heat-insulating installation cover, the heat-insulating installation cover is rotatably connected to the protective cover, one end of the heat-insulating installation cover is rotatably connected to a partition plate, a positioning plate is fixedly installed on the inner side of one end of the heat-insulating installation cover, a central gear is rotatably connected to the middle part of one side of the positioning plate, four planetary gears are movably installed on the outer side of the central gear, one end of the planetary gear is installed with a material placement and heating unit, the material placement and heating unit comprises an infrared quartz glass heating tube, a material placement sleeve is installed on the inner side of the infrared quartz glass heating tube, and a positioning sleeve is installed on one end of the material placement sleeve;

[0007] The observation adjustment mechanism includes an adjustment driven wheel, which is fixedly connected to the partition plate, an adjustment driving wheel is installed at the bottom end of the adjustment driven wheel, a transmission connecting rod is installed on one side of the adjustment driving wheel, and a transmission block is fixedly installed at the upper end of the transmission connecting rod.

[0008] Preferably, the measurement and control mechanism also includes a control panel fixedly connected to the front end of the power connection installation box, a display screen is fixedly installed on the front face of the control panel, a device mounting seat is fixedly installed on the front end of the upper end face of the power connection installation box, a camera is fixedly installed on the rear end face of the device mounting seat, a plurality of fill light beads are installed on the outer side of the camera, a light-shielding protective cover is rotatably connected to the rear end of the power connection installation box, a limit strip is provided on the outer side of the protective cover, a waist-shaped observation window is installed on one side of the limit strip, two arc-shaped clamp strips are installed on both ends of the protective cover, and a locking knob is installed on the inner side of the upper ends of two adjacent arc-shaped clamp strips.

[0009] Preferably, the centrifugal insulation mechanism also includes a second motor mounting seat fixedly connected to the other end of the insulation mounting cover, a second transmission motor is fixedly installed in the middle of one side of the second motor mounting seat, a transparent insulation box is installed on the inner side of the middle part of the insulation mounting cover, four positioning cavities are provided on the inner side of the transparent insulation box, and one end of the positioning sleeve is rotatably connected to a limiting block.

[0010] Preferably, the observation and adjustment mechanism also includes a first motor mounting seat fixedly connected to the rear end of the power connection installation box, a first transmission motor is fixedly installed on the inner side of the middle part of the first motor mounting seat, and four loading and unloading holes are provided on one side of the adjustment driven wheel.

[0011] Preferably, the inner wall of the light-shielding protective cover is provided with a light-shielding film, the front end face of the device mounting seat is in contact with the inner wall of the front end of the light-shielding protective cover, the device mounting seat is electrically connected to the camera and multiple fill-light beads, the protective cover is fixedly connected to the waist-shaped observation window and the limit strip, the waist-shaped observation window is made of transparent acrylic, the bottom ends of the four arc-shaped clamp strips are fixedly connected to the power connection installation box, the upper ends of the two adjacent arc-shaped clamp strips are threadedly connected to the locking knob, and the two ends of the thermal insulation installation cover are locked and installed with the power connection installation box through the locking knob and the two arc-shaped clamp strips.

[0012] Preferably, the output end of the first transmission motor passes through the first motor mounting seat and is fixedly connected to the upper end of the transmission connecting rod through a transmission block, the adjustment driven wheel is coaxial with the first transmission motor, the adjustment driven wheel is connected to the adjustment driving wheel through tooth meshing, and the adjustment driven wheel and the adjustment driving wheel are both rotatably connected to the transmission connecting rod.

[0013] Preferably, the four loading and unloading holes are arranged in a circle relative to the axis of the adjusting driven wheel, the limit blocks are arranged on the inner sides of the loading and unloading holes, the adjusting driven wheel is connected to the four limit blocks by threads, and the limit blocks are coaxial with the placing sleeve.

[0014] Preferably, the second transmission motor is fixedly connected to the thermal insulation mounting cover via a second motor mounting base, the output end of the second transmission motor passes through the positioning plate and is connected to the center gear via a flat key, the center gear and four planetary gears are all rotationally connected to the positioning plate, and the center gear and four circumferentially arranged planetary gears are all connected via inter-tooth meshing.

[0015] Preferably, the infrared quartz glass heating tube is arranged on the inner side of the positioning cavity, the end of the infrared quartz glass heating tube away from the positioning sleeve passes through the transparent insulation box and is plugged into the inner side of the planetary gear, the positioning sleeve passes through the transparent insulation box and is plugged into the inner side of the infrared quartz glass heating tube, the positioning sleeve is fixedly connected to the material placing sleeve, and waist-shaped observation holes are provided on both sides of the material placing sleeve.

[0016] A method for using a device for measuring interfacial tension of multiphase fluid in a simulated high-temperature reservoir, comprising the following steps:

[0017] S1: Place a sample for measuring interfacial tension in a sample tube, and place the sample tube inside the material placement sleeve. The positioning cavity is coaxial with the upper and lower material holes. An infrared quartz glass heating tube is installed inside the positioning cavity, so that the material placement sleeve is inserted into the inner side of the infrared quartz glass heating tube through the upper and lower material holes, and then the material placement sleeve is positioned and protected by the infrared quartz glass heating tube. Then, the limit block is connected to the adjustment driven wheel through threads and the upper and lower material holes are blocked, so as to limit the positioning sleeve and prevent the material placement heating unit from slipping out of the positioning cavity during high-speed centrifugation.

[0018] S2: Turn on the power supply, set the temperature, speed and centrifugal time during the measurement process through the control panel and the display screen, lock and install the temperature insulation installation cover and the power connection installation box through the arc clamp strip and the locking knob, start the second transmission motor, so that the second transmission motor drives the central gear to rotate in the middle of one side of the positioning plate under the support of the second motor mounting seat and the temperature insulation installation cover, and then the central gear drives the four material placement and heating units to rotate at a high speed on the inner side of the positioning cavity through the planetary gear, so as to realize the high-speed centrifugal operation of the sample inside the material placement sleeve, and at the same time, the sample can be evenly heated through the infrared quartz glass heating tube;

[0019] S3: Waist-shaped observation holes are provided on both sides of the material placement sleeve. When measuring and observing the sample after high-temperature centrifugation, the first transmission motor is started, so that the first transmission motor drives the adjustment driving wheel to rotate relative to the partition plate through the transmission block and the transmission connecting rod under the support of the first motor mounting seat, and then the adjustment driving wheel drives the four material placement heating units to rotate along the axis of the first transmission motor through the adjustment driven wheel and the partition plate. At the same time, the four material placement heating units can drive the transparent insulation box to rotate on the inner side of the insulation mounting cover, so that the angle of the material placement heating unit can be adjusted;

[0020] S4: The protective cover drives the waist-shaped observation window and the limit bar to be rotated and dialed on the outside of the temperature-insulating installation cover, so that the limiting effect of the protective cover on the limit bar can accurately and quickly determine the angle of the waist-shaped observation window, and then the camera can collect images and measure the state of the sample through the waist-shaped observation window and the waist-shaped observation hole through multiple fill-in light beads under the shading effect of the shading protective cover, thereby realizing the measurement operation of the interfacial tension of the multiphase fluid. The shading protective cover and the fill-in light beads can effectively avoid the interference of external light on the camera, and effectively improve the measurement accuracy;

[0021] S5: By rotating the light-shielding protective cover and pulling the protective sleeve in the opposite direction, the personnel can visually observe the sample through the waist-shaped observation window and waist-shaped observation hole. By separating the limit block and the adjustment driven wheel, the material sleeve can be pulled out from the infrared quartz glass heating tube, making it easy to take, place and replace the sample, and the operation is simple.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention places a sample for measuring interfacial tension in a sample tube, and places the sample tube inside a material placement sleeve, connects a limit block to an adjusting driven wheel through threads, and blocks the upper and lower material holes, thereby limiting the positioning sleeve, preventing the material placement and heating unit from slipping out of the positioning cavity during high-speed centrifugation. The second transmission motor drives the planetary gear through the central gear to synchronously drive the four material placement and heating units to perform high-speed self-rotation operation inside the positioning cavity, thereby achieving high-speed centrifugation of the sample inside the material placement sleeve. At the same time, the infrared quartz glass heating tube can uniformly heat the sample, effectively improving the processing efficiency of the sample;

[0024] 2. The present invention provides waist-shaped observation holes on both sides of the material placement sleeve. The first transmission motor drives the adjustment driving wheel to rotate relative to the partition plate through the transmission block and the transmission connecting rod, and then the adjustment driving wheel drives the four material placement and heating units to rotate synchronously by adjusting the driven wheel and the partition plate, so as to adjust the angle of the material placement and heating units. The limiting effect of the protective sleeve on the limiting bar can accurately and quickly determine the angle of the waist-shaped observation window. The camera can perform image acquisition and state measurement of the sample through the waist-shaped observation window and the waist-shaped observation hole through a plurality of fill-in lamp beads under the shading effect of the shading protective cover, effectively avoiding the interference of external light on the camera and effectively improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 A top view of the present invention as a whole;

[0027] Figure 3 It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0028] Figure 4 This is a schematic diagram of the installation structure of the protective cover of the present invention;

[0029] Figure 5 It is a schematic diagram of the installation structure of the centrifugal heat preservation mechanism of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the observation and adjustment mechanism of the present invention;

[0031] Figure 7 It is a schematic cross-sectional structure diagram of the observation and adjustment mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the installation structure of the adjustable driving wheel of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the centrifugal heat preservation mechanism of the present invention;

[0034] Fig.10 It is a schematic diagram of the explosion structure of the centrifugal heat preservation mechanism of the present invention;

[0035] Fig.11 It is a schematic cross-sectional structure diagram of the centrifugal heat preservation mechanism of the present invention;

[0036] Fig.12 It is a schematic diagram of the cross-sectional structure of the transparent heat-insulating box of the present invention;

[0037] Fig.13 It is a schematic diagram of the explosion structure of the material placement and temperature increasing unit of the present invention.

[0038] In the figure: 1. measurement control mechanism; 101. support base; 102. power connection installation box; 103. control panel; 104. display screen; 105. fill light beads; 106. arc clamp strip; 107. locking knob; 108. light shielding protective cover; 109. device mounting seat; 110. protective cover; 111. waist-shaped observation window; 112. limit strip; 113. camera; 2. observation adjustment mechanism; 201. first motor mounting seat; 202. first transmission motor; 203. transmission block; 204. transmission Connecting rod; 205, adjusting driving wheel; 206, adjusting driven wheel; 207, loading and unloading holes; 3, centrifugal insulation mechanism; 301, insulation installation cover; 302, transparent insulation box; 303, second motor mounting seat; 304, partition plate; 305, material placement and heating unit; 306, limit block; 307, positioning plate; 308, second transmission motor; 309, central gear; 310, planetary gear; 311, infrared quartz glass heating tube; 312, positioning sleeve; 313, material placement sleeve; 314, positioning cavity. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] The first transmission motor 202 (model GV50-3.7KW-60-S) and the second transmission motor 308 (model MDSKSRS080) mentioned in the present invention can be purchased from the market or obtained through private customization.

[0041] See also Figures 1 to 5 , an embodiment of the present invention: a device for measuring the interfacial tension of a multiphase fluid simulating a high-temperature reservoir, comprising a measuring control mechanism 1, an observation and adjustment mechanism 2 and a centrifugal heat preservation mechanism 3, the upper end surface of the measuring control mechanism 1 is installed with the observation and adjustment mechanism 2, one end of the observation and adjustment mechanism 2 is installed with the centrifugal heat preservation mechanism 3, the measuring control mechanism 1 comprises a supporting base 101, the upper end surface of the supporting base 101 is fixedly installed with an electric connection installation box 102, the rear end of the upper end surface of the electric connection installation box 102 is installed with a protective sleeve 110, the front end of the electric connection installation box 102 is fixedly installed with a control panel 103, the front end surface of the control panel 103 is fixedly installed with a display screen 104, the temperature, speed and centrifugal time in the measuring process are set through the control panel 103 and the display screen 104;

[0042] A device mounting seat 109 is fixedly mounted on the front end of the upper end face of the power connection installation box 102, and a light shielding protective cover 108 is rotatably connected to the rear end of the power connection installation box 102. The inner wall of the light shielding protective cover 108 is provided with a light shielding film. The front end face of the device mounting seat 109 is in contact with the inner wall of the front end of the light shielding protective cover 108, and a camera 113 is fixedly mounted on the rear end face of the device mounting seat 109. A plurality of fill-in light beads 105 are mounted on the outer side of the camera 113. The device mounting seat 109 is electrically connected to the camera 113 and the plurality of fill-in light beads 105. The camera 113 can measure the interfacial tension of the sample by performing fill-in light through the plurality of fill-in light beads 105 under the light shielding effect of the light shielding protective cover 108;

[0043] A limiting strip 112 is provided on the outer side of the protective sleeve 110, and a waist-shaped observation window 111 is installed on one side of the limiting strip 112. The protective sleeve 110 is fixedly connected to the waist-shaped observation window 111 and the limiting strip 112. Two arc-shaped clamp strips 106 are installed at both ends of the protective sleeve 110, and a locking knob 107 is installed on the inner side of the upper ends of two adjacent arc-shaped clamp strips 106. The waist-shaped observation window 111 is made of transparent acrylic, and the bottom ends of the four arc-shaped clamp strips 106 are fixedly connected to the power connection installation box 102, and the upper ends of two adjacent arc-shaped clamp strips 106 are threadedly connected to the locking knob 107. The protective sleeve 110 drives the waist-shaped observation window 111 and the limiting strip 112 to rotate and move, so that the limiting effect of the protective sleeve 110 on the limiting strip 112 can accurately and quickly determine the angle of the waist-shaped observation window 111.

[0044] See also Figures 4 to 13The centrifugal heat preservation mechanism 3 includes a heat insulation installation cover 301, which is rotatably connected to the protective sleeve 110. Both ends of the heat insulation installation cover 301 are locked and installed with the power connection installation box 102 through a locking knob 107 and two arc-shaped clamp strips 106. One end of the heat insulation installation cover 301 is rotatably connected with a partition plate 304. A positioning disk 307 is fixedly installed on the inner side of one end of the heat insulation installation cover 301. A central gear 309 is rotatably connected to the middle part of one side of the positioning disk 307. Four planetary gears 310 are movably installed on the outer side of the central gear 309. The central gear 309 and the four planetary gears 310 are all rotatably connected to the positioning disk 307. The central gear 309 and the four circumferentially arranged planetary gears 310 are all meshed with teeth. The central gear 309 synchronously drives the four material placing and heating units 305 to perform high-speed rotation operation on the inner side of the positioning cavity 314 through the planetary gears 310.

[0045] A material placement heating unit 305 is installed at one end of the planetary gear 310. The material placement heating unit 305 includes an infrared quartz glass heating tube 311. The infrared quartz glass heating tube 311 can uniformly heat the sample. A material placement sleeve 313 is installed on the inner side of the infrared quartz glass heating tube 311. Both sides of the material placement sleeve 313 are provided with waist-shaped observation holes. A positioning sleeve 312 is installed at one end of the material placement sleeve 313. The end of the infrared quartz glass heating tube 311 away from the positioning sleeve 312 penetrates a transparent The heat preservation box 302 is plugged into the inner side of the planetary gear 310, the positioning sleeve 312 penetrates the transparent heat preservation box 302 and is plugged into the inner side of the infrared quartz glass heating tube 311, the positioning sleeve 312 is fixedly connected to the material placement sleeve 313, one end of the positioning sleeve 312 is rotatably connected to the limiting block 306, and the upper and lower material holes 207 can be blocked by the limiting block 306, so as to limit the positioning sleeve 312, and prevent the material placement and heating unit 305 from slipping out of the positioning cavity 314 during high-speed centrifugation;

[0046] A second motor mounting seat 303 is fixedly mounted on the other end of the temperature-insulating mounting cover 301, and a second transmission motor 308 is fixedly mounted in the middle of one side of the second motor mounting seat 303. The second transmission motor 308 is fixedly connected to the temperature-insulating mounting cover 301 through the second motor mounting seat 303, and the output end of the second transmission motor 308 passes through the positioning plate 307 and is connected to the central gear 309 through a flat key. A transparent insulation box 302 is installed on the inner side of the middle of the temperature-insulating mounting cover 301, and four positioning cavities 314 are arranged on the inner side of the transparent insulation box 302. An infrared quartz glass heating tube 311 is arranged on the inner side of the positioning cavity 314, so that the second transmission motor 308 drives the planetary gear 310 through the central gear 309 and synchronously drives the four material placing and heating units 305 to perform high-speed rotation operation on the inner side of the positioning cavity 314, thereby realizing high-speed centrifugation operation of the sample inside the material placing sleeve 313.

[0047] See also Figures 6 to 8 , observe that the adjustment mechanism 2 includes an adjustment driven wheel 206, which is fixedly connected to the partition plate 304, and one side of the adjustment driven wheel 206 is provided with four loading and unloading holes 207, and the bottom end of the adjustment driven wheel 206 is installed with an adjustment driving wheel 205, and one side of the adjustment driving wheel 205 is installed with a transmission connecting rod 204, and the upper end of the transmission connecting rod 204 is fixedly installed with a transmission block 203, and the rear end of the power connection installation box 102 is fixedly installed with a first motor mounting seat 201, and the inner side of the middle of the first motor mounting seat 201 is fixedly installed with a first transmission motor 202, and the output end of the first transmission motor 202 passes through the first motor The mounting seat 201 is fixedly connected to the upper end of the transmission connecting rod 204 through the transmission block 203, and the adjustment driven wheel 206 is connected to the adjustment driving wheel 205 through tooth meshing, so that the first transmission motor 202 drives the adjustment driving wheel 205 to rotate through the transmission block 203 and the transmission connecting rod 204, and then the adjustment driving wheel 205 drives the four material placing and heating units 305 to rotate synchronously through the adjustment driven wheel 206 and the partition plate 304, and at the same time, the four material placing and heating units 305 can drive the transparent insulation box 302 to rotate on the inner side of the insulation mounting cover 301, so that the angle of the material placing and heating units 305 can be adjusted;

[0048] The adjusting driven wheel 206 is coaxial with the first transmission motor 202. The adjusting driven wheel 206 and the adjusting driving wheel 205 are both rotatably connected to the transmission connecting rod 204. The four loading and unloading holes 207 are arranged in a circle relative to the axis of the adjusting driven wheel 206. The limit blocks 306 are arranged on the inner sides of the loading and unloading holes 207. The adjusting driven wheel 206 is connected to the four limit blocks 306 through threads. The limit blocks 306 are coaxial with the material placement sleeve 313. The material placement sleeve 313 can be extracted from the infrared quartz glass heating tube 311 by separating the limit blocks 306 from the adjusting driven wheel 206, so as to facilitate the placement and replacement of samples.

[0049] A method for using a device for measuring interfacial tension of multiphase fluid in a simulated high-temperature reservoir, comprising the following steps:

[0050] S1: Place a sample for measuring interfacial tension in a sample tube, and place the sample tube on the inner side of the material placement sleeve 313. The positioning cavity 314 is coaxial with the loading and unloading holes 207. An infrared quartz glass heating tube 311 is installed on the inner side of the positioning cavity 314, so that the material placement sleeve 313 is inserted into the inner side of the infrared quartz glass heating tube 311 through the loading and unloading holes 207, and then the material placement sleeve 313 is positioned and protected by the infrared quartz glass heating tube 311. Then, the limiting block 306 is connected to the adjusting driven wheel 206 through threads and the loading and unloading holes 207 are blocked, so as to limit the positioning sleeve 312 and prevent the material placement heating unit 305 from slipping out of the positioning cavity 314 during high-speed centrifugation.

[0051] S2: Turn on the power supply, set the temperature, speed and centrifugation time during the measurement process through the control panel 103 and the display screen 104, lock and install the temperature-insulating installation cover 301 and the power connection installation box 102 through the arc-shaped clamp strip 106 and the locking knob 107, start the second transmission motor 308, so that the second transmission motor 308 drives the central gear 309 to rotate in the middle of one side of the positioning plate 307 under the support of the second motor mounting seat 303 and the temperature-insulating installation cover 301, and then the central gear 309 drives the four material placement and heating units 305 to rotate at a high speed on the inner side of the positioning cavity 314 through the planetary gear 310, so as to realize the high-speed centrifugation operation of the sample inside the material placement sleeve 313, and at the same time, the sample can be evenly heated through the infrared quartz glass heating tube 311;

[0052] S3: Waist-shaped observation holes are provided on both sides of the material placement sleeve 313. When measuring and observing the sample after high-temperature centrifugation, the first transmission motor 202 is started, so that the first transmission motor 202 drives the adjustment driving wheel 205 to rotate relative to the partition plate 304 through the transmission block 203 and the transmission connecting rod 204 under the support of the first motor mounting seat 201, and then the adjustment driving wheel 205 drives the four material placement heating units 305 to rotate along the axis of the first transmission motor 202 by adjusting the driven wheel 206 and the partition plate 304. At the same time, the four material placement heating units 305 can drive the transparent insulation box 302 to rotate on the inner side of the insulation mounting cover 301, so that the angle of the material placement heating unit 305 can be adjusted;

[0053] S4: The protective cover 110 drives the waist-shaped observation window 111 and the limit bar 112 to be rotated and toggled outside the temperature-insulating mounting cover 301, so that the limiting effect of the protective cover 110 on the limit bar 112 can accurately and quickly determine the angle of the waist-shaped observation window 111, and then the camera 113 can perform image acquisition and state measurement of the sample through the waist-shaped observation window 111 and the waist-shaped observation hole under the shading effect of the shading protective cover 108 through multiple fill-in light beads 105, thereby realizing the measurement operation of the interfacial tension of the multiphase fluid. The shading protective cover 108 and the fill-in light beads 105 can effectively avoid the interference of external light on the camera 113, and effectively improve the measurement accuracy;

[0054] S5: By rotating the light-shielding protective cover 108 and reversely shifting the protective sleeve 110, personnel can visually observe the sample through the waist-shaped observation window 111 and the waist-shaped observation hole. By separating the limit block 306 and the adjustment driven wheel 206, the material sleeve 313 can be drawn out from the infrared quartz glass heating tube 311, making it easy to take, place and replace the sample, and the operation is simple.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for measuring the interfacial tension of multiphase fluids in a simulated high-temperature reservoir, comprising a measurement control mechanism (1), an observation and adjustment mechanism (2) and a centrifugal heat preservation mechanism (3), characterized in that: The upper end surface of the measurement and control mechanism (1) is installed with an observation and adjustment mechanism (2), one end of the observation and adjustment mechanism (2) is installed with a centrifugal heat preservation mechanism (3), the measurement and control mechanism (1) comprises a support base (101), the upper end surface of the support base (101) is fixedly installed with an electrical connection installation box (102), and the rear end of the upper end surface of the electrical connection installation box (102) is installed with a protective cover (110); The centrifugal heat preservation mechanism (3) comprises a heat insulation installation cover (301), the heat insulation installation cover (301) is rotatably connected to the protective cover (110), one end of the heat insulation installation cover (301) is rotatably connected to a partition plate (304), a positioning plate (307) is fixedly installed on the inner side of one end of the heat insulation installation cover (301), a central gear (309) is rotatably connected to the middle part of one side of the positioning plate (307), four planetary gears (310) are movably installed on the outer side of the central gear (309), one end of the planetary gear (310) is installed with a material placement and temperature increase unit (305), the material placement and temperature increase unit (305) comprises an infrared quartz glass heating tube (311), a material placement sleeve (313) is installed on the inner side of the infrared quartz glass heating tube (311), and a positioning sleeve (312) is installed on one end of the material placement sleeve (313); The observation adjustment mechanism (2) comprises an adjustment driven wheel (206), the adjustment driven wheel (206) is fixedly connected to the partition plate (304), an adjustment driving wheel (205) is installed at the bottom end of the adjustment driven wheel (206), a transmission connecting rod (204) is installed on one side of the adjustment driving wheel (205), and a transmission block (203) is fixedly installed at the upper end of the transmission connecting rod (204); The centrifugal heat preservation mechanism (3) further comprises a second motor mounting seat (303) fixedly connected to the other end of the heat insulation mounting cover (301); a second transmission motor (308) is fixedly mounted in the middle of one side of the second motor mounting seat (303); a transparent heat preservation box (302) is mounted on the inner side of the middle of the heat insulation mounting cover (301); four positioning cavities (314) are arranged on the inner side of the transparent heat preservation box (302); and one end of the positioning sleeve (312) is rotatably connected to a limiting block (306); The observation and adjustment mechanism (2) also includes a first motor mounting seat (201) fixedly connected to the rear end of the power connection installation box (102), a first transmission motor (202) is fixedly installed on the inner side of the middle part of the first motor mounting seat (201), and four loading and unloading holes (207) are provided on one side of the adjustment driven wheel (206); The four loading and unloading holes (207) are arranged in a circle relative to the axis of the adjusting driven wheel (206); the limit blocks (306) are arranged on the inner side of the loading and unloading holes (207); the adjusting driven wheel (206) is connected to the four limit blocks (306) by threads; and the limit blocks (306) are coaxial with the material placing sleeve (313).

2. The device for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir according to claim 1, characterized in that: The measurement control mechanism (1) further comprises a control panel (103) fixedly connected to the front end of the power connection installation box (102); a display screen (104) is fixedly mounted on the front end surface of the control panel (103); a device mounting seat (109) is fixedly mounted on the front end of the upper end surface of the power connection installation box (102); a camera (113) is fixedly mounted on the rear end surface of the device mounting seat (109); a plurality of fill light beads (105) are mounted on the outer side of the camera (113); a light shielding protective cover (108) is rotatably connected to the rear end of the power connection installation box (102); a limit strip (112) is disposed on the outer side of the protective cover (110); a waist-shaped observation window (111) is mounted on one side of the limit strip (112); two arc-shaped clamp strips (106) are mounted on both ends of the protective cover (110); a locking knob (107) is mounted on the inner side of the upper ends of two adjacent arc-shaped clamp strips (106).

3. The device for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir according to claim 2, characterized in that: The inner wall of the shading protective cover (108) is provided with a shading film, the front end surface of the device mounting seat (109) is in close contact with the inner wall of the front end of the shading protective cover (108), the device mounting seat (109) is electrically connected to the camera (113) and the plurality of fill light beads (105), the protective cover (110) is fixedly connected to the waist-shaped observation window (111) and the limit strip (112), the waist-shaped observation window (111) is made of transparent acrylic, the bottom ends of the four arc-shaped clamp strips (106) are fixedly connected to the power connection installation box (102), the upper ends of the two adjacent arc-shaped clamp strips (106) are threadedly connected to the locking knob (107), and the two ends of the thermal insulation installation cover (301) are locked and installed with the power connection installation box (102) through the locking knob (107) and the two arc-shaped clamp strips (106).

4. The device for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir according to claim 3, characterized in that: The output end of the first transmission motor (202) passes through the first motor mounting seat (201) and is fixedly connected to the upper end of the transmission connecting rod (204) through a transmission block (203); the adjusting driven wheel (206) is coaxial with the first transmission motor (202); the adjusting driven wheel (206) is connected to the adjusting driving wheel (205) through inter-tooth meshing; and the adjusting driven wheel (206) and the adjusting driving wheel (205) are both rotationally connected to the transmission connecting rod (204).

5. The device for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir according to claim 4, characterized in that: The second transmission motor (308) is fixedly connected to the thermal insulation mounting cover (301) via a second motor mounting seat (303); the output end of the second transmission motor (308) passes through the positioning plate (307) and is connected to the central gear (309) via a flat key; the central gear (309) and four planetary gears (310) are all rotationally connected to the positioning plate (307); and the central gear (309) and four circumferentially arranged planetary gears (310) are all connected via inter-tooth meshing.

6. The device for measuring interfacial tension of multiphase fluid in simulated high-temperature reservoir according to claim 5, characterized in that: The infrared quartz glass heating tube (311) is arranged on the inner side of the positioning cavity (314); one end of the infrared quartz glass heating tube (311) away from the positioning sleeve (312) passes through the transparent heat preservation box (302) and is plugged into the inner side of the planetary gear (310); the positioning sleeve (312) passes through the transparent heat preservation box (302) and is plugged into the inner side of the infrared quartz glass heating tube (311); the positioning sleeve (312) is fixedly connected to the material placement sleeve (313); waist-shaped observation holes are provided on both sides of the material placement sleeve (313).

7. A method for using the device for measuring interfacial tension of multiphase fluid in a simulated high-temperature reservoir according to claim 6, characterized in that: The following steps are involved: S1: placing a sample for measuring interfacial tension in a sample tube, and placing the sample tube inside a material placement sleeve (313); the positioning cavity (314) is coaxial with the material loading and unloading hole (207); an infrared quartz glass heating tube (311) is installed inside the positioning cavity (314), so that the material placement sleeve (313) is inserted into the inner side of the infrared quartz glass heating tube (311) through the material loading and unloading hole (207); and the material placement sleeve (313) is positioned and protected by the infrared quartz glass heating tube (311); and then the limiting block (306) is connected to the adjusting driven wheel (206) by threading and the material loading and unloading hole (207) is blocked, so that the positioning sleeve (312) can be limited, and the material placement temperature increasing unit (305) is prevented from slipping out of the positioning cavity (314) during high-speed centrifugation; S2: Turn on the power supply, set the temperature, speed and centrifugation time during the measurement process through the control panel (103) and the display screen (104), lock and install the temperature-insulating installation cover (301) and the power connection installation box (102) through the arc-shaped clamp strip (106) and the locking knob (107), start the second transmission motor (308), so that the second transmission motor (308) drives the central gear (309) to rotate in the middle of one side of the positioning plate (307) under the support of the second motor mounting seat (303) and the temperature-insulating installation cover (301), and then the central gear (309) drives the four material placement and heating units (305) to perform high-speed self-rotation operation inside the positioning cavity (314) through the planetary gear (310), so as to realize high-speed centrifugation operation of the sample inside the material placement sleeve (313), and at the same time, the sample can be evenly heated through the infrared quartz glass heating tube (311); S3: waist-shaped observation holes are provided on both sides of the material placement sleeve (313). When measuring and observing the sample after high-temperature centrifugation, the first transmission motor (202) is started, so that the first transmission motor (202) drives the adjustment driving wheel (205) to rotate relative to the partition plate (304) through the transmission block (203) and the transmission connecting rod (204) under the support of the first motor mounting seat (201), and then the adjustment driving wheel (205) drives the four material placement heating units (305) to rotate along the axis of the first transmission motor (202) through the adjustment driven wheel (206) and the partition plate (304). At the same time, the four material placement heating units (305) can drive the transparent insulation box (302) to rotate on the inner side of the insulation mounting cover (301), so that the angle of the material placement heating unit (305) can be adjusted; S4: The protective cover (110) drives the waist-shaped observation window (111) and the limit bar (112) to be rotated and toggled outside the temperature-insulating installation cover (301), so that the limiting effect of the protective cover (110) on the limit bar (112) can accurately and quickly determine the angle of the waist-shaped observation window (111), and then the camera (113) can collect images and measure the state of the sample through the waist-shaped observation window (111) and the waist-shaped observation hole through the shading effect of the shading protective cover (108) through the multiple fill-in light beads (105), thereby realizing the measurement operation of the interfacial tension of the multiphase fluid. The shading protective cover (108) and the fill-in light beads (105) can effectively avoid the interference of external light on the camera (113), and effectively improve the measurement accuracy; S5: By rotating the light-shielding protective cover (108) and reversing the protective cover (110), the personnel can visually observe the sample through the waist-shaped observation window (111) and the waist-shaped observation hole. By separating the limit block (306) and the adjustment driven wheel (206), the material sleeve (313) can be drawn out from the infrared quartz glass heating tube (311), thereby facilitating the placement and replacement of the sample, and the operation is simple and convenient.

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