CN218003172U

CN218003172U - Improved device for measuring surface tension based on maximum bubble pressure method

Info

Publication number: CN218003172U
Application number: CN202221612478.6U
Authority: CN
Inventors: 黄成�; 孙源; 余铭羽; 贾安睿; 彭焕军; 孙哲成
Original assignee: Southwest University
Current assignee: Southwest University
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-12-09
Anticipated expiration: 2032-06-24

Abstract

The utility model discloses a survey surface tension improvement device based on maximum bubble is pressed to method relates to surface tension and measures technical field, and its technical scheme main points are: including lifting unit and pressure regulation part, lifting unit includes the base, lifting support, lift fine setting knob and dead lever, the lifting support outer wall is located to lift fine setting knob, lift fine setting knob and lifting support sliding connection, the dead lever middle part is equipped with capillary and long neck funnel, the top surface middle part of base is equipped with and presss from both sides the cover beaker, the rim of a cup top of pressing from both sides the cover beaker is arranged in to the mouth of pipe of capillary one end and the liquid outlet of long neck funnel, it is equipped with the solution that awaits measuring in the cover beaker to press from both sides, pressure regulation part includes the latex connecting pipe, dropping liquid funnel and ground mouth bottle, ground mouth bottle is equipped with the bottle plug wall thickness, latex connecting pipe one end is run through the bottle plug wall thickness and is arranged in the ground mouth bottle, the liquid outlet of dropping liquid funnel runs through the bottle plug and arranges in the ground mouth bottle, latex connecting pipe middle part is equipped with digital pressure gauge. Through the lifting component, can adjust the effect that makes capillary and liquid level accurate tangent.

Description

Improved device for measuring surface tension based on maximum bubble pressure method

Technical Field

The utility model relates to a surface tension measures technical field, and more specifically says, it relates to survey surface tension improvement device based on maximum bubble is pressed.

Background

Surface tension is a force acting on a liquid surface to reduce the liquid surface area, and is one of the important properties of a substance. Surface tension has wide application in production and life. By the relationship between the surface tension and the concentration, important physicochemical parameters such as the adsorption amount and the molecular cross-sectional area of the substance can be further obtained.

The surface tension can be measured by a capillary rise method, a maximum bubble pressure method, a drop weight method, a pull-off method, or the like. The maximum bubble pressure method experiment device is simple, contact angles and liquid density do not need to be measured, and operation is convenient. However, the biggest problem in the actual operation of the existing device is that the cutting depths of the capillary tubes into the liquid level are difficult to be consistent, and the capillary tubes are very difficult to be accurately tangent to the liquid level.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a survey surface tension improvement device based on maximum bubble method to solve the existing device of mentioning and actually operate the in-process capillary and cut into the liquid level degree of depth and be difficult to unanimous, accomplish accurate tangent very difficult.

The above technical object of the present invention can be achieved by the following technical solutions: surface tension improvement device is surveyed based on biggest bubble method, including lifting unit and pressure adjustment part, lifting unit includes base, lifting support, lift fine setting knob and dead lever, lifting support locates the top surface of base perpendicularly, the lift support outer wall is located to lift fine setting knob, lift fine setting knob and lifting support sliding connection, the dead lever is connected with the perpendicular fixed connection of lift fine setting knob, the dead lever is parallel with the base, the dead lever middle part is equipped with capillary and long neck funnel, capillary and long neck funnel are perpendicular with the base, the top surface middle part of base is equipped with and presss from both sides the cover beaker, the rim of a cup top that presss from both sides the cover beaker is arranged in to the mouth of pipe of capillary bottom and the liquid outlet of long neck funnel, it is equipped with the solution that awaits measuring in the cover beaker, pressure adjustment part includes latex connecting pipe, dropping liquid funnel and ground mouthful bottle, the ground mouthful bottle is equipped with the bottle plug, latex connecting pipe one end runs through the wall thickness and arranges in the ground mouthful bottle in, the one end that the latex connecting pipe other end of cover beaker connecting pipe kept away from both sides the cover beaker is connected, the liquid outlet of dropping funnel runs through in arranging in the ground mouthful bottle, the bottle is equipped with the bottle plug connecting pipe, the bottle plug connecting pipe middle part is equipped with digital manometer.

By adopting the above technical scheme, through the lift part, be convenient for adjust the height of capillary, thereby reach the purpose of accurate leveling, through the pressure adjustment part, be convenient for adjustable change device inside atmospheric pressure, thereby utilize the biggest bubble pressure method to survey tension, through the base, be convenient for fix the lifting support and place the cover beaker of pressing from both sides, through the lifting support, be convenient for go up and down the fine setting knob and act on the lifting support outer wall, supplementary regulation dead lever height, through going up and down the fine setting knob, be convenient for adjust the dead lever height accurately, through the dead lever, be convenient for drive the capillary accurate and the tangent capillary that passes through of liquid level, thereby make capillary and the tangent capillary phenomenon that takes place of liquid level, be convenient for utilize the biggest bubble pressure method to survey liquid surface tension, utilize the long neck funnel, prevent that the liquid level from shaking when adjusting the liquid level height, through pressing from both sides the cover beaker, for the solution that awaits measuring provides the constant temperature environment, through the latex connecting pipe, be convenient for the capillary is connected with the pressure adjustment part, thereby help to change in the capillary, through the dropping funnel, be convenient for observe the change of the pressure in the device, the bottle plug of the continuation law, through the ground bottle and bottle, be convenient for the bottle plug change.

In this scheme, move on the lifting support outer wall through lift fine setting knob to the help dead lever drives the capillary, thereby changes the height of capillary, thereby reaches the accurate tangent purpose of capillary and liquid level.

The utility model discloses further set up to: the liquid outlet of the long-neck funnel is 2cm lower than the pipe orifice of one end of the capillary close to the jacket beaker.

Through adopting above-mentioned technical scheme, the liquid outlet through setting up the long-neck funnel is less than the capillary and is close to the mouth of pipe 2cm that presss from both sides cover beaker one end, is convenient for at the in-process of accurate regulation, and the liquid outlet of long-neck funnel is in the solution that awaits measuring to reach the purpose that prevents the liquid level and vibrate.

The utility model discloses further set up to: the jacket beaker is 100ML, and the inner diameter of the jacket beaker is 45MM, the outer diameter of the jacket beaker is 65MM, and the height of the jacket beaker is 100MM.

Through adopting above-mentioned technical scheme, through setting up the capacity that presss from both sides the cover beaker, be convenient for practice thrift the quantity of the solution that awaits measuring to reach green chemical purpose.

The utility model discloses further set up to: the height of the lifting support is 300MM.

Through adopting above-mentioned technical scheme, highly being 300MM through setting up lifting support, the hoisting device's of being convenient for portability.

The utility model discloses further set up to: the fixed rod is provided with a plurality of snap ring structures.

Through adopting above-mentioned technical scheme, through snap ring structure, be convenient for the dismantlement and the installation of capillary and long neck funnel.

The utility model discloses further set up to: the opening at the bottom of the jacket beaker is a constant-temperature water inlet, and the opening at one side of the cup opening of the jacket beaker is a constant-temperature water outlet.

By adopting the technical scheme, through the constant-temperature water inlet and the constant-temperature water outlet, the water in the interlayer of the jacket beaker is always in a constant-temperature state, so that the normal operation of an experiment is facilitated.

To sum up, the utility model discloses following beneficial effect has: through the lift part, be convenient for adjust the height of capillary, thereby reach the purpose of accurate leveling, through the pressure adjustment part, be convenient for adjustable change device inside atmospheric pressure, thereby utilize the method of maximum bubble pressure to survey tension, through the base, be convenient for fix the lift support and place the cover beaker, through the lift support, be convenient for lift fine setting knob acts on the lift support outer wall, supplementary dead lever height of adjusting, through lift fine setting knob, be convenient for accurate regulation dead lever height, through the dead lever, be convenient for drive the capillary accurate with the tangent capillary that passes through of liquid level, thereby make the capillary and the tangent capillary phenomenon that takes place of liquid level, be convenient for utilize the method of maximum bubble pressure to survey liquid surface tension, utilize the long neck funnel, prevent that the liquid level from shaking when adjusting the liquid level height, through the cover beaker, provide the constant temperature environment for the solution that awaits measuring, through the connecting pipe, be convenient for capillary and pressure adjustment part are connected, thereby help to change the pressure in the capillary, through the emulsion funnel, be convenient for the regulation capillary's of continuation law pressure change, through ground mouth bottle and bottle plug, be convenient for provide an airtight environment, prevent the unable change of bottle internal pressure, through the digital pressure gauge, be convenient for observe the change of device.

Drawings

FIG. 1 is a schematic diagram of an improved apparatus for measuring surface tension based on the maximum bubble pressure method according to an embodiment of the present invention;

fig. 2 is a structure diagram of a fixing rod of the improved device for measuring surface tension based on maximum bubble pressure method in the embodiment of the present invention.

In the figure: 1. a lifting member; 2. a pressure regulating member; 3. a capillary tube; 4. a long-neck funnel; 5. a jacketed beaker; 6. a constant temperature water inlet; 7. a constant temperature water outlet; 8. a solution to be tested; 9. a digital pressure gauge; 10. a bottle stopper; 201. a latex connecting pipe; 202. grinding the bottle; 203. a dropping funnel; 101. a base; 102. a lifting support; 103. a lifting fine adjustment knob; 104. a fixing rod; 1041. a snap ring structure.

Detailed Description

The present invention is described in further detail below with reference to fig. 1-2.

Example (b): improved device for measuring surface tension based on maximum bubble pressure method, as shown in fig. 1-2, including lifting unit 1 and pressure regulating unit 2, lifting unit 1 includes base 101, lifting support 102, lifting fine adjustment knob 103 and dead lever 104, base 101 adopts the common iron stand platform in the laboratory, lifting fine adjustment knob 103 adopts microscope fine adjustment knob structure, lifting support 102 vertical fixation welds the top surface at base 101, lifting fine adjustment knob 103 is fixed in lifting support 102 outer wall, lifting fine adjustment knob 103 and lifting support 102 sliding connection, dead lever 104 and lifting fine adjustment knob 103 vertical fixation are connected, dead lever 104 is parallel with base 101, dead lever 104 middle part fixed mounting has capillary 3 and long neck funnel 4, capillary 3 and long neck funnel 4 are perpendicular to base 101, a jacket beaker 5 has been placed in the top surface middle part of base 101, the thermostatted water gets into from the thermostatted water inlet 6 of jacket beaker 5, the thermostatted water outlet 7 of jacket beaker 5 discharges from, the mouth of pipe of capillary 3 bottom and the liquid outlet of long neck funnel 4 places in the cup mouth of beaker 5, the jacket 8 has been placed in the beaker 5, thermostatted water enters into from the thermostatted water inlet 6 of jacket, discharge outlet 7 of jacket, connect the bottle plug 201 with the bottle plug 21, the connecting pipe 201 of the bottle, the bottle plug is connected with the rubber ground bottle plug 20, the rubber ground connecting pipe 201 of bottle, the bottle 202, the bottle connecting pipe 201 of bottle, the bottle is connected with the bottle plug 201 of the bottle plug 201.

In this embodiment, through lifting unit 1, be convenient for adjust the height of capillary 3, thereby reach the purpose of accurate leveling, through pressure adjustment unit 2, be convenient for the inside atmospheric pressure of adjustable change device, thereby utilize maximum bubble pressure method survey tension, through base 101, be convenient for fix lifting support 102 and place jacket beaker 5, through lifting support 102, be convenient for lift fine setting knob 103 acts on lifting support 102 outer wall, supplementary regulation dead lever 104 height, through lift fine setting knob 103, be convenient for accurate regulation dead lever 104 height, through dead lever 104, be convenient for drive capillary 3 accurate with the tangent through capillary 3 of liquid level, thereby make capillary 3 and the tangent capillary of liquid level take place capillary phenomenon, be convenient for utilize maximum bubble pressure method survey liquid surface tension, utilize long neck funnel 4, prevent that the liquid level from taking place the oscillation when adjusting the liquid level height, through jacket beaker 5, provide the constant temperature environment for solution 8 that awaits measuring, through latex 201, be convenient for capillary 3 and pressure adjustment unit 2 to be connected, thereby help to change the pressure in the capillary 3, through 203, be convenient for the regulation rule of continuity of capillary 3, through grind mouth bottle 202 and 10, be convenient for provide a sealed bottle plug pressure bottle, it can's change through the digital observation device to be convenient for.

The liquid outlet of the long-neck funnel 4 is 2cm lower than the pipe orifice of one end of the capillary 3 close to the jacket beaker 5.

In this embodiment, the liquid outlet through setting up long-neck funnel 4 is less than the mouth of pipe 2cm that capillary 3 is close to 5 one ends of jacket beaker, is convenient for at the in-process of accurate regulation, and the liquid outlet of long-neck funnel 4 is in solution 8 that awaits measuring to reach the purpose that prevents the liquid level and vibrate.

The jacket beaker 5 was used at 100ML, and the jacket beaker 5 had an inner diameter of 45MM, an outer diameter of 65MM and a height of 100MM.

In this embodiment, the volume of the jacket beaker 5 is set to facilitate the saving of the amount of the solution 8 to be measured, thereby achieving the purpose of green chemistry.

The height of the lifting bracket 102 is 300MM.

In this embodiment, the portability of the lifting device is facilitated by setting the height of the lifting bracket 102 to 300MM.

The fixing rod 104 is provided with two snap ring structures 1041, the snap ring structures 1041 are grooves with elastic deformation, and the capillary 3 and the long-neck funnel 4 are fixed on the fixing rod 104 by extruding the grooves of the snap ring structures 1041 through the tube wall.

In this embodiment, the removal and installation of the capillary 3 and the long-neck funnel 4 is facilitated by the snap ring structure 1041.

The opening at the bottom of the jacket beaker 5 is a constant temperature water inlet 6, and the opening at one side of the rim of the jacket beaker 5 is a constant temperature water outlet 7.

In this embodiment, the water in the interlayer of the jacket beaker 5 is always kept at a constant temperature through the constant temperature water inlet 6 and the constant temperature water outlet 7, so as to facilitate the normal operation of the experiment.

The working principle is as follows: when needs use, arrange cover beaker 5 in base 101 top surface, fix capillary 3 and long-neck funnel 4 on dead lever 104, the mouth of pipe of its capillary 3 is close to 8 liquid levels of solution that await measuring, the liquid outlet of long-neck funnel 4 is arranged in solution 8 that await measuring, the mouth of pipe that the cover beaker 5 was kept away from to capillary 3 is connected with the one end of latex connecting pipe 201, the other end of latex connecting pipe 201 runs through the bottle plug 10 and arranges in ground bottle 202, the liquid outlet of dropping funnel 203 runs through the bottle plug 10 and arranges in ground bottle 202.

And (3) sucking the solution of the capillary tube 3 close to the tube opening of the liquid level by using filter paper, lifting the dropping funnel 203, adjusting the internal and external pressures of the capillary tube 3 to be 1 atmosphere, adjusting the internal and external pressure difference to be 0Pa, zeroing the digital pressure gauge 9, putting down the dropping funnel 203, observing whether the digital pressure gauge 9 is 0Pa, and otherwise, indicating that the tube opening of the capillary tube 3 is blocked. The nozzle solution was blotted dry with filter paper and the procedure repeated.

Sucking the solution 8 to be measured in the jacket beaker 5 by a dropper for standby, rotating the lifting fine adjustment knob 103 to enable the pipe orifice of the capillary 3 close to the liquid level of the solution 8 to be measured to be infinitely close to the liquid level, dropwise adding the standby solution which is just taken out into the dropping funnel 203 until the last drop is added and the capillary 3 is just tangent to the liquid level, opening the dropping funnel 203, and controlling the dropping speed to be 5-10 seconds to generate a bubble. And observing the digital pressure gauge 9, and recording the instantaneous maximum pressure difference of the bubble overflow at the tangent position of the capillary 3 and the liquid level.

The specific embodiments are only for explaining the present invention, and it is not a limitation to the present invention, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present invention.

Claims

1. Based on maximum bubble pressure method survey surface tension improvement device, characterized by: including lifting unit (1) and pressure adjustment part (2), lifting unit (1) includes base (101), lifting support (102), lift fine setting knob (103) and dead lever (104), the top surface of base (101) is located perpendicularly to lifting support (102), lift fine setting knob (103) is located to lift support (102) outer wall, lift fine setting knob (103) and lifting support (102) sliding connection, dead lever (104) and lift fine setting knob (103) vertical fixation are connected, dead lever (104) are parallel with base (101), dead lever (104) middle part is equipped with capillary (3) and long neck funnel (4), capillary (3) and long neck funnel (4) are perpendicular with base (101), the top surface middle part of base (101) is equipped with and presss from both sides cover beaker (5), the mouth top of pressing from both sides cover beaker (5) is arranged in to the mouth of pipe mouth of capillary (3) and the liquid outlet of long neck funnel (4) of capillary (3) bottom, be equipped with solution (8) that awaits measuring in beaker (5), pressure adjustment part (2) includes latex bottle plug wall thickness (203), latex grinding bottle neck (202) and grinding mouth (202) and connecting pipe (201) are arranged in the connecting tube (201), bottle plug grinding flask (202) and grinding flask (202) are equipped with bottle plug grinding flask (202) In, the one end that presss from both sides cover beaker (5) is kept away from with capillary (3) to latex connecting pipe (201) other end is connected, the liquid outlet of dropping funnel (203) runs through in bottle plug (10) arranges ground bottle (202) in, latex connecting pipe (201) middle part is equipped with digital pressure table (9).

2. The apparatus for improving surface tension measurement based on the maximum bubble pressure method according to claim 1, wherein: the liquid outlet of the long-neck funnel (4) is 2cm lower than the pipe orifice of one end of the capillary (3) close to the jacket beaker (5).

3. The apparatus for improving surface tension measurement based on the maximum bubble pressure method according to claim 1, wherein: the jacket beaker (5) adopts 100ML, and the inner diameter of the jacket beaker (5) is 45MM, the outer diameter thereof is 65MM, and the height thereof is 100MM.

4. The apparatus for improving surface tension measurement based on the maximum bubble pressure method according to claim 1, wherein: the height of the lifting bracket (102) is 300MM.

5. The apparatus of claim 1, wherein the apparatus comprises: the fixing rod (104) is provided with a plurality of clamping ring structures (1041).

6. The apparatus for improving surface tension measurement based on the maximum bubble pressure method according to claim 1, wherein: the opening at the bottom of the jacket beaker (5) is a constant-temperature water inlet (6), and the opening at one side of the rim of the jacket beaker (5) is a constant-temperature water outlet (7).