CN2141893Y - Vernier chattock gauge - Google Patents
Vernier chattock gauge Download PDFInfo
- Publication number
- CN2141893Y CN2141893Y CN 92241003 CN92241003U CN2141893Y CN 2141893 Y CN2141893 Y CN 2141893Y CN 92241003 CN92241003 CN 92241003 CN 92241003 U CN92241003 U CN 92241003U CN 2141893 Y CN2141893 Y CN 2141893Y
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- CN
- China
- Prior art keywords
- glass tube
- scale
- measuring
- microbarograph
- vernier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a vernier chattock gauge belonging to the technical field of pressure measuring gauge, which mainly comprises a filled liquid large container, a measuring glass tube, a float vernier, a multiway valve and a sliding magnifier. The utility model has the advantages of simple structure, high measuring precision, low cost, high precision and convenient operation. The float vernier is arranged in the measuring glass tube, the sliding magnifier is arranged at the front of the measuring glass tube, and the multiway valve with straight through holes is adopted so as to improve the operation performance of the gauge. The vernier chattock gauge can be used to measure the micro-pressure or pressure difference of the fluid.
Description
The utility model relates to a kind of cursor type microbarograph, a kind of fluid column formula measuring cell of measuring the minute-pressure differential pressure of more specifically saying so, and it belongs to the pressure measuring instruments field.
At present, the fluid column formula pressure measurement of generally using both at home and abroad is in respect of U-tube manometer, single column manometer, inclined tube micro pressure gauge.Though three kinds of manometric structures are simple, measure the capillarity that the surface tension of liquid effect causes in the glass tube, make liquid surface crooked up or down, and the direct reading of single scale eyes, influenced tonometric precision.The YYT-200B type tilting pressure gauge of producing as the red space in Shanghai Electronic Equipment Factory preferably wherein, for having the tilting pressure gauge of multidirectional valve, though multidirectional valve has brought many convenience for manometric operation, but because the valve core through hole complications of multidirectional valve, after using repeatedly, through hole is easily stifled, and is difficult for getting a good grasp of, and brings difficulty for constantly normal pressure measurement.In addition, also have a kind of compensate-type micropressure meter,, during pressure measurement, need to adjust repeatedly and compensation, could obtain measurement result accurately, operate very complicatedly, especially when pressure surge, can't carry out normal surveying work though measuring accuracy is higher.
The purpose of this utility model is to overcome the deficiency in the above-mentioned measuring cell, and provides a kind of simple in structure, and operating maintenance is convenient, and cost is lower and fluid column cursor type microbarograph that precision is higher.
The purpose of this utility model can reach by following measures: design a kind of cursor type microbarograph, by the topping up bulk container that has an implementation of port, multidirectional valve, measurement glass tube, steelframe, chassis, horizontal adjustment parts, zero point regulating parts and form, it is characterized in that steelframe is vertically mounted on the chassis, be equipped with the measurement glass tube of a band scale in the steelframe, two kinds of liquid and a float vernier scale are housed in the glass tube, the slidably magnifier framework of a band Spring Card is installed on the steelframe in measurement glass tube scale dead ahead, and changeover valve family of power and influence core through hole is a clear opening.
It is the microbarograph that has designed two surveyors' staffs and usefulness that the utility model improves one of measure of measuring accuracy, the scale that it is characterized in that measuring on the glass tube is a main scale, the float vernier scale of measuring in the glass tube is to divide scale, forms complete survey measurements by the reading of two scales.The float vernier scale has both works as float, again when the function of dividing scale.Be used as float, can eliminate the crooked up or down reading error of being brought of liquid level in the glass tube; Be used as the branch scale, can reduce because of the bigger measuring error of bringing of main scale calibration.
The utility model improve measuring accuracy measure two be to have designed the microbarograph that adopts two kinds of liquid, it is characterized in that measuring two kinds of liquid arranged in the glass tube, a kind of is working fluid, another kind is a sealing liquid, sealing liquid severe is less than working fluid, and do not mix with working fluid.Sealing liquid severe is less than working fluid and do not mix with working fluid and could guarantee that sealing liquid floats on the working fluid all the time.
The utility model improves the microbarograph of three to be well-designed have float vernier scales of the measure of measuring accuracy, it is characterized in that putting into the float vernier scale center of gravity of measuring glass tube and be positioned at the bottom, and the comprehensive severe of integral body is between working fluid and sealing liquid.Design could guarantee that the float vernier scale all is submerged in the sealing liquid like this, to eliminate the influence that the hydraulic fluid capillary force moves up and down in glass tube to the float vernier scale.
Microbarograph of the present utility model has also designed a magnifier has been installed on the steelframe of measuring glass tube main scale dead ahead simultaneously, this magnifier is embedded on the framework of band Spring Card, Spring Card is stuck on the steelframe, the hand Spring Card, the framework of magnifier just can slide up and down the position of float vernier scale along steelframe, the reading of main scale and branch scale is amplified, the error of reading is reduced.
The microbarograph of the utility model design is characterized in that the valve core through hole of said multidirectional valve is a clear opening, and has two-layer.Valve core through hole is divided into two layers, and an end of upper strata through hole is the negative pressure interface, and an end of lower floor's through hole is a positive pressure interface.When gaging pressure during greater than atmospheric pressure, measured pressure is connected on the positive pressure interface (15) of lower floor's through hole of valve, and another termination proofed sleeve of lower floor's through hole is communicated to the topping up bulk container.When gaging pressure during less than atmospheric pressure, measured pressure is received on the negative pressure joint (14) of valve upper strata through hole, and another termination proofed sleeve of upper strata through hole is communicated with measures end connector (10) on glass tube.When measure differences in pressure, then tested high-pressure side is connected on the positive pressure connector (15) of valve, be connected on by the low pressure end of pressure measurement on the negative pressure joint (14) of valve.Because the valve core through hole of multidirectional valve is divided into two layers, valve core through hole is a clear opening, be easy to processing, and in use if through hole is blocked accidentally, only need just can conveniently get a good grasp of with hard filament, the through hole that has overcome former multidirectional valve is difficult for the trouble that through hole is blocked and is difficult for getting a good grasp of in processing and the use, for Operation and maintenance bring convenience.
The principle of work of the utility model microbarograph also is according to the hydrostatics ultimate principle:
P
2＝P
1＋γh·10
－3……（1）
In the formula: P
1: measure the pressure (Pa) on the liquid level in the glass tube
P
2: the pressure (Pa) in the topping up bulk container on the liquid level
γ: the severe (N/m of hydraulic fluid
3)
H: the difference in height (mm) of measuring liquid level and the interior liquid level of topping up bulk container in the glass tube thus, when pressure survey, the pressure differential pressure P of measurement is:
P＝P
2－P
1＝γh·10
－3＝γ（h
1＋h
2）·10
－3……（2）
In the formula: h
1: measure the height (mm) that liquid level rises in the glass tube
h
2: the height (mm) that liquid level descends in the topping up bulk container
Because liquid is incompressible fluid, thereby the liquid volume of discharging in the topping up bulk container equals to enter the liquid volume of measuring in the glass tube.Promptly have:
h
1·F
1＝h
2·F
2
Then
h
2＝h
1·F
1／F
2……（3）
Formula is: F
1: measure sectional area (mm) in the glass tube
F
2: sectional area (mm) in the topping up bulk container
With formula (3) substitution formula (2), obtain:
P＝γ（1＋F
1／F
2）h
1·10
－3……（4）
Thereby obtained the one-to-one relationship between liquid-column height and the pressure.Make F
1/ F
2As far as possible little, to reduce in the process because of F
1, F
2Error to the influence of measuring accuracy.
Suppose
γ·（1＋F
1／F
2）·10
－3＝C
P=Ch is then arranged
1(5)
h
1＝P／C ……（6）
According to the occurrence of C and formula (5), (6), main scale and float vernier scale can be carried out pressure unit calibration and long measure calibration.
The selection of the utility model cursor type microbarograph hydraulic fluid can be chosen according to concrete technical requirement.Simultaneously little than hydraulic fluid according to severe, and the principle of not dissolving each other with hydraulic fluid is chosen corresponding sealing liquid.As: with water is hydraulic fluid, and kerosene is sealing liquid; With the phenixin is hydraulic fluid, and water is sealing liquid; Potpourri with alcohol and water is a working fluid, and kerosene is sealing liquid; With phenixin and kerosene mixture is working fluid, and water is sealing liquid or the like.
Structure of the present utility model further specifies with accompanying drawing:
Fig. 1 is the front elevation of a kind of project organization of the utility model cursor type microbarograph; Among the figure: (1) is base plate; (2) be reference column; (3) be the topping up bulk container; (4) be the implementation of port nut; (5) be the float vernier scale; (6) be left side wing plate; (7) be steelframe; (8) be the slip magnifier; (9) for measuring glass tube; (10) for measuring end connector on the glass tube; (11) connect sebific duct for negative pressure; (12) be valve handle; (13) be multidirectional valve; (14) be the negative pressure interface; (15) be positive pressure interface; (16) be right side wing plate; (17) for connecting sebific duct; (18) be the zeroing nut; (19) be hold-down nut; (20) be the horizontal adjustment screw; (21) for connecting sebific duct; (22) be level indicator.
Fig. 2 is the vertical view of Fig. 1 cursor type microbarograph
Fig. 3 is the front elevation of base plate (1)
Fig. 4 is the vertical view of base plate (1)
Fig. 5 is the vertical view of topping up bulk container (3)
Fig. 6 is the front elevation of float vernier scale (5)
Fig. 7 is the front elevation of steelframe (7)
Fig. 8 is the A-A sectional view of steelframe (7)
Fig. 9 is the front elevation of slip magnifier (8)
Figure 10 is the B-B sectional view of slip magnifier (8)
Figure 11 is the front elevation of multidirectional valve (13)
Figure 12 is the C-C sectional view of multidirectional valve (13)
Figure 13 is the D-D sectional view of multidirectional valve (13)
Figure 14 is the vertical view of right side wing plate (16)
Figure 15 is the front elevation of zeroing nut (18)
Figure 16 is the front elevation of the another kind of project organization of cursor type microbarograph.
The utility model cursor type microbarograph is described in further detail with example.
Embodiment one: design a cursor type microbarograph as shown in Figure 1, the potpourri of selecting alcohol and water for use is as hydraulic fluid, and kerosene is as measuring the sealing liquid on the operating fluid level in the glass tube.Hydraulic fluid severe is 88000N/m
3Measuring the glass tube internal diameter is 7mm, measure in the glass tube that the ratio of sectional area is 1/450 in the sectional area and topping up bulk container, measure the glass tube main scale and carry out calibration by every lattice 10Pa, every lattice length is 10/9mm, and the float vernier scale is selected the polytetrafluoroethylene material for use, and the center hollows out, the metal weight is loaded onto in the bottom, and the comprehensive severe of float vernier scale is 80000N/m
3Carry out calibration by every lattice 9Pa, every lattice length is 9/9=1mm.The design measurement range is 2000Pa, and then the full-scale reading error is ± 0.5Pa.
Embodiment two: the assembling process of the utility model cursor type microbarograph as shown in Figure 1: at first install horizontal adjustment screw (20) and level indicator (21) on the base plate (1), base plate (1) is penetrated steelframe (7), tighten hold-down nut (19), to return to zero respectively a nut (18) and a left side, right side wing plate (6,16) be contained on the steelframe (7), and on right side wing plate (16), load onto multidirectional valve (13), then topping up bulk container (3) is embedded steelframe, install a left side, the reference column (2) of right both sides, at last float vernier scale (5) is put into and measured glass tube (9), and the steelframe of packing into, tighten and measure end connector (10) on the glass tube, the groove of slip magnifier (8) on the steelframe (7) inserted, and connect and respectively connect sebific duct.
Embodiment three: the utility model is the method for operating of cursor type microbarograph as shown in Figure 1: turn on implementation of port nut (4), charge into hydraulic fluid, disconnect and connect sebific duct (11), end connector (10) injects a certain amount of sealing liquid on the glass tube from measuring, the implementation of port of screwing on again nut connects connection sebific duct (11), adjusts horizontal adjustment screw (20) to base plate (1) level, multidirectional valve (13) is reached the position of calibration, regulate zeroing nut (18) and return to zero.After this, measurement that the microbarograph input is formal.When measuring malleation, testing pressure is linked to each other with positive pressure interface (15); When measuring negative pressure, testing pressure is linked to each other with negative pressure interface (14); When measuring pressure reduction, high-pressure section is linked to each other with positive pressure interface (15), low-pressure section links to each other with negative pressure interface (14).After connecting, multidirectional valve (13) is reached the pressure measurement position, the testing pressure differential pressure is just by the main scale of measuring glass tube (9) and the branch scale of float vernier scale (5), by reading after slip magnifier (8) amplification.
Embodiment four: make a cursor type microbarograph as shown in figure 16, concrete technical parameter is identical with embodiment one, is the structure difference, and the microbarograph center of gravity of this shape is stable not as Fig. 1, but easy to process.It is scale unit that the calibration mode of scale can adopt with Pa or millimeter fluid column.
The utility model is compared with existing fluid column formula manometer, has precision height, advantage simple in structure, easy and simple to handle.
1, precision height: adopt the float vernier scale to eliminate the measure error that the liquid concave surface causes; Adopt the float vernier scale to do to divide scale and magnifying glass to amplify reading, raising is measured smart Degree.
2, simple in structure: the main member of the utility model vernier chattock gauge is the topping up bulk container, steelframe, and float vernier scale and measurement glass tube, multidirectional valve, with single-column manometer, the manometric simple degree of tilting is suitable, and is simpler than compensate-type micropressure meter.
3, easy and simple to handle: as when adopting the pressure measurement of the utility model vernier chattock gauge, after adjusting through differential manometer zeroing and level, to connect testing pressure, multidirectional valve is reached the pressure measurement position, just can be by the main scale of measuring on the glass tube, the branch scale of float vernier scale amplifies reading out data by magnifying glass. And multidirectional valve spool of valve through hole is clear opening, is difficult for taking place through hole and stops up, and has stopped up also to be easy to get a good grasp of.
The utility model vernier chattock gauge is suitable for the measurement of fluid minute-pressure differential pressure.
Claims (5)
1, a kind of cursor type microbarograph, by the topping up bulk container that has an implementation of port, multidirectional valve, measurement glass tube, steelframe, chassis, horizontal adjustment parts, zero point regulating parts and form, it is characterized in that: steelframe is vertically mounted on the chassis, be equipped with the measurement glass tube of a band scale in the steelframe, two kinds of liquid and a float vernier scale are housed in the glass tube, the slidably magnifier framework of a band Spring Card is installed on the steelframe in measurement glass tube scale dead ahead, and changeover valve family of power and influence core through hole is a clear opening.
2, microbarograph according to claim 1, the scale that it is characterized in that measuring on the glass tube is a main scale, the float vernier scale of measuring in the glass tube is to divide scale, forms complete survey measurements by two rod readings.
3, microbarograph according to claim 1 is characterized in that measuring two kinds of liquid is arranged in the glass tube, and a kind of is working fluid, and another kind is a sealing liquid, and sealing liquid severe is less than working fluid, and does not mix with working fluid.
4, microbarograph according to claim 1 it is characterized in that the float vernier scale center of gravity of measuring in the glass tube is positioned at the bottom, and whole comprehensive severe is between working fluid and sealing liquid.
5, microbarograph according to claim 1 is characterized in that the valve core through hole of said multidirectional valve is a clear opening, and has two-layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241003 CN2141893Y (en) | 1992-11-10 | 1992-11-10 | Vernier chattock gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241003 CN2141893Y (en) | 1992-11-10 | 1992-11-10 | Vernier chattock gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2141893Y true CN2141893Y (en) | 1993-09-08 |
Family
ID=33781192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92241003 Expired - Fee Related CN2141893Y (en) | 1992-11-10 | 1992-11-10 | Vernier chattock gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2141893Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217252A (en) * | 2013-03-25 | 2013-07-24 | 上海市计量测试技术研究院 | Movable container type high-precision micro-pressure detection device |
| CN108519191A (en) * | 2018-05-09 | 2018-09-11 | 浙江省医疗器械检验研究院 | The test system of disposable thoracic duction instrument and dry envelope valve type high negative pressure automatic releasing valve |
-
1992
- 1992-11-10 CN CN 92241003 patent/CN2141893Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217252A (en) * | 2013-03-25 | 2013-07-24 | 上海市计量测试技术研究院 | Movable container type high-precision micro-pressure detection device |
| CN103217252B (en) * | 2013-03-25 | 2015-04-15 | 上海市计量测试技术研究院 | Movable container type high-precision micro-pressure detection device |
| CN108519191A (en) * | 2018-05-09 | 2018-09-11 | 浙江省医疗器械检验研究院 | The test system of disposable thoracic duction instrument and dry envelope valve type high negative pressure automatic releasing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |