CN2475016Y - Novel equilibrium pipe net easy bumping and inverting suction - Google Patents

Abstract

A novel balance pipe which is uneasy to violently boil and inversely suck, comprising a condenser pipe (1) and a 'measured liquid and pressure indicating area' (8), wherein the measured liquid and the pressure indicating area are integrated and divided into an inner and an outer part by an internal-cavity tube. The lower portion of the internal-cavity tube is opened with a small hole (6) which is about 10 mm away from the lower port plane. An annular channel is arranged under the inner and the outer cavity, and an upward protuberance is arranged on the bottom of the balance pipe. Compared with the conventional balance pipe, the novel balance pipe of the utility model has the advantages that the measured liquid can be conveniently filled, poured out and cleaned, the measured liquid is uneasy to violently boil and is impossible to inversely suck, air exhaust degree can be checked and even temperature of measured body system is ensured, operation is simple and convenient, and measurement result is more precise.

Description

The novel balance pipe that is difficult for bumping and suck-back

The utility model belongs to glass apparatus, and the vapor pressure that can be used for the not too little neat liquid of vapor pressure is measured.

At present, in scientific experimentation and experimental teaching, the nucleus equipment that static method is measured neat liquid saturated vapor pressure device is balance pipe (accompanying drawing 1).Among Fig. 1, the 1st, straight cold finger, during use, its connection vacuum system suitable for reading, the cooling effectiveness of this condenser pipe is lower; The 2nd, buffering ball; When 3,4 liang of chamber liquid levels are contour, represent that the pressure in 5 chambeies is identical with the pressure of system; 5,7 be an amount of fluid to be measured.During exhaust, because 7 remain static, bumping causes 6 chamber liquid to pour 3 chambeies easily, and 4 chamber liquid are flushed to more than the condenser pipe, and experiment can't be carried out because of bumping.The eliminating degree of air also can only be determined by rule of thumb in 6 chambeies.When thinking that air got rid of to such an extent that meet the requirements, stop to bleed and air inlet in system, when regulating 3,4 liang of chamber liquid levels, will cause suck-back in an unguarded moment, light then have only the partially liq in 3,4 to pour 6 chambeies, controlled range is narrowed down, and the heavy then air in 4 also can pour 6 chambeies, needs exhaust again again.Even the skilled person of multi-pass operations also is difficult to control, let alone the student.8 is the determination object district, and 9 for showing nip.In addition, this balance pipe, the adding of fluid to be measured is also cumbersome: the first step, need earlier to be approximately half fluid to be measured of 6 chamber volumes from adding suitable for reading, then the rotary balance pipe makes it flow into 6 chambeies; Estimate that again adding 3 chamber liquid levels when 3,4 liang of chamber liquid levels are in level approximately are positioned at the fluid to be measured at beads middle part, 3 chamber.

The purpose of this utility model provide a kind of be difficult for bumping and suck-back and have from beating action, can check again air get rid of degree, fluid to be measured adds novel comparatively easily balance pipe.

For achieving the above object, design a kind of novel balance pipe, seen accompanying drawing 2.Among Fig. 2,1 is a spherical condensation tube with 4～6 balls, and it has higher condensation efficiency, and it is suitable for reading to link to each other with vacuum system; 2, the 3rd, buffering ball; The 4th, exocoel; The 5th, inner chamber; The 6th, diameter is the aperture of 2～5mm, the bed 7～13mm of its centre distance 5; 4 and 5 liang of chambeies also have a circular passage in the bottom, the vertical height of this circular passage is 1～3mm, are best with 2mm; The 7th, an amount of fluid to be measured, its adding method is: from adding fluid to be measured suitable for reading, can keep flat balance pipe at any time, make air enter 3 chambeies, perpendicular again put balance pipe then two chamber liquid levels be in level substantially, so repeatable operation gets final product in the middle of liquid level reaches the thin portion in 4 chambeies; 8 projectioies that make progress for the balance pipe bottom center, its structure is seen accompanying drawing 3.Pour out the liquid in the balance pipe, can erect earlier and put balance pipe, rotate then and be inverted it, make liquid flow into 5, and then pour out it along this protruding falcate groove; The 9th, determination object with show nip.

When allowing system decompression get rid of 4 chamber air, the liquid level in the exocoel 4 descends, and the liquid level of inner chamber 5 rises.When the liquid level of exocoel 4 drops to aperture 6, gas will be cut into bubble by 6 and enter inner chamber 5.This makes chamber pressure increase to some extent, causes the exocoel liquid level to rise, and sealing 6 forces bubble to emerge one by one.Simultaneously, inside and outside two chamber liquid levels are shaken up and down, stirred fluid to be measured and make its temperature be tending towards evenly having prevented bumping effectively.In order to check the eliminating degree of air in 4, can close the piston of bleeding, slowly air inlet in system, this moment, 5 chamber liquid levels progressively descended, and 4 chamber liquid levels progressively rise, and when the gas phase in 4 chambeies becomes an outward appearance diameter and has only the bubble of 1mm, stop air inlet immediately.And at this moment 5 chamber liquid levels are still on hole 6, and air can not enter 4 chambeies.And that residual outward appearance diameter of 4 chambeies has only the bubble of 1mm not influence measurement result.

The utility model is compared with former balance pipe, and fluid to be measured adds and pours out conveniently; Both be not easy the also impossible suck-back of bumping; Can check air eliminating degree, can guarantee that again the tested systems temperature is even; Simple to operation, measurement result is also comparatively accurate.Thereby reached purpose of design of the present utility model.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 2 is equipped with the static section full figure of material for the utility model; Fig. 3 is the three-view diagram of the utility model exocoel bottom; Fig. 4 is three kinds of duties that the utility model " fluid to be measured with show nip " shows.Fig. 5 is a complete set of Experimental equipment of the utility model embodiment.

Among Fig. 2, the utility model can be divided into two parts: the one, and condenser pipe; The 2nd, fluid to be measured with show nip.Compare with former balance pipe, condenser pipe changes sphere into by straight shape, has not only improved condensation effect, has also strengthened buffer action.The test solution tagma with show that nip is integrated and both improved function, reduced overall volume again.

Among Fig. 3,1 is the front view of balance pipe bottom protrusion; 2 is its side view; 3 is its horizontal section.

Among Fig. 4, Fig. 4 (1) represents the vapour pressure of fluid to be measured greater than system pressure, duty of the present utility model when promptly bleeding.Wherein 1 by condenser pipe connection vacuum system; 2 is bubble, and the speed of evacuation is the best with it intermittently; 3 is the liquid level position of inner chamber 5, is the best with the middle part that is in this buffering ball; 4 is exocoel; 5 is inner chamber; 4 gaseous phase volume should just equal to exceed in 5 chambeies liquid volume of 4 chamber liquid levels for best when design; 6 is aperture, and its diameter can be 2～5mm, is best with 3mm; 7 is 4 chamber liquid levels.

Among Fig. 4, the state when air is got rid of degree in 4 chambeies is checked in Fig. 4 (2) expression.Wherein 1 is residual bubble, and 4 chamber volumes and the fluid to be measured of visual aperture more than 6 determined the maximum permissible value of its outward appearance diameter measuring vapour pressure under the temperature; 4 is exocoel; 5 is inner chamber; 6 is aperture; 7 is 5 chamber liquid levels, and it should be higher than upper edge 1～10mm of 6 at least, preferably about 6mm.

Among Fig. 4, the air in Fig. 4 (3) expression 4 chambeies is got rid of to such an extent that meet the requirements, by suitable air inlet or bleed, regulates the state after 4,5 liang of chamber liquid levels are in same surface level.At this moment, promptly can read the vacuum tightness data of measuring temperature and system.

Embodiment

Fig. 5 is a complete set of Experimental equipment of the utility model embodiment.Wherein 1 is balance pipe; 2 is temperature-sensing probe; 3 is 1/10 thermometer; 4 is fluid to be measured water; 5 is rare KCl aqueous solution (heating bath); 6 is well heater; 7 is temperature controller; 8 are the heating magnetic stirring apparatus; 9 is U-tube manometer; 10 are air inlet two logical glass pistons; 11 for the screw clamp of clamping proofed sleeve; 12 are the two logical pistons of bleeding; 13 for containing the surge flask of anhydrous calcium chloride; 14 are emptying two logical pistons; 15 is bottle,suction; 16 for connecting the bleeding point of vacuum pump.

Experimental implementation is as follows:

1. read the room temperature and the atmospheric pressure on the same day from width of cloth court of a feudal ruler formula barometer.

2. open condensation water swivel, air bleed piston (14), vacuum pump.After treating that vacuum pump runs well, close 14.

3. temperature controller (7) and temperature control magnetic stirring apparatus (8) all place 30 ℃ of temperature controls.

4. close air inlet piston (10), open the piston of bleeding (12) and bleed.Can observe the state that Fig. 4 (1) appears in balance pipe this moment.

5. 3～the 4min that bleeds closes 12.Screw screw clamp (11), open 10,,, can screw 11, and close 10 when residual bubble outward appearance diameter during less than 1mm while observe the exocoel gaseous phase volume unscrew 11 air inlets.Otherwise, should continue exhaust, until residual bubble outward appearance diameter less than 1mm.The situation of Here it is Fig. 4 (2).

6. slowly open 12, behind inside and outside two chamber liquid levels contour [seeing Fig. 4 (3)], close 12.If the inner chamber liquid level is higher, can pass through 10,11 air inlets again, regulate inside and outside two the chamber liquid level be contour getting final product.Read the temperature and pressure of this moment.

7. temperature controller (7) and temperature control magnetic stirring apparatus (8) are all placed 40 ℃ of temperature controls.Along with the carrying out of heating, suitably air inlet is kept a little higher than exocoel liquid level of inner chamber liquid level and is got final product.When reaching predetermined temperature, it is contour to regulate inside and outside two chamber liquid levels, promptly can read temperature and pressure.

8. in the experiment, if make the complete obiteration of exocoel gas phase accidentally, can under the situation that does not break away from vacuum system balance pipe be taken off from support, the horizontal balance pipe enters exocoel by air.Again measure after the exhaust again.

9. measure and finish, read a subatmospheric again, get the experiment beginning and the atmospheric pressure of the mean value when finishing during as experiment.

Claims (5)

1. balance pipe, it is made up of condenser pipe, buffering ball, interior pipe and overcoat, it is characterized in that condenser pipe is the spherical condensation tube with 4～6 balls; Interior pipe has a circular passage outward, also has a little hole path in interior pipe side bottom being enclosed within; Jacket bottom central authorities raise up, and there is a groove this projection side, and interior pipe is divided into inside and outside two chambeies to the overcoat space.

2. balance pipe according to claim 1 is characterized in that: the ratio of exocoel volume (aperture upper edge enclosed cavity above water) and cavity volume (cavity between the surface level at aperture upper edge surface level and adjacent excessively first buffering ball center) should be between 1: 1.0～1.3.

3. balance pipe according to claim 1 is characterized in that: the vertical height of this annular flow path is between 1～3mm.

4. balance pipe according to claim 1 is characterized in that: hole diameter is 2～5mm, and its lower edge is 3～8mm apart from interior pipe bed.

5. balance pipe according to claim 1 is characterized in that: the groove of protruding side is conical (little side of circular cone).

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