CN2101229U - Portable multifunction checker for manometer and vacuumometer - Google Patents

Abstract

The utility model relates to a portable multifunctional checker for a manometer and a vacuum meter, which is composed of a liquid pump, a gas pump, a connecting pipe, a soft pipe, valve seats and a support frame, and the portable multifunctional checker can use air or liquid as working mediums. The liquid pump 6 and two valve seats 1, 4 with manometer joints are connected by a section duct 2, the lower end of the soft pipe is connected with the liquid pump 6, the other end can be connected with the gas pump 3, and the liquid pump 6 and the two valve seats 1, 4 with the manometer joints are fixedly arranged on the support frame 5. The portable multifunctional checker has the characteristics of light weight (the weight is not more than 7.5 k g), small external dimension (the length* the width* the height is not more than 330* 240* 160 m m), complete function, wide detecting range (-0.1 to 60 MP a), simple operation, convenience, strong reliability, etc., is convenient to be carried by detecting personnel who work into factories, and is also suitable for being fixed in a measuring room.

Description

Portable multifunction checker for manometer and vacuumometer

The utility model belongs to a kind of pressure gauge tester.

The measurement range overwhelming majority of tensimeter, pressure vacuum meter and vacuum meter that China's production at present, scientific research, life are used is between-0.1～60MPa(or-0.1～40MPa).Along with carrying out and implementing of China's industrial and agricultural production, research work development and measurement Law, the calibration operation amount of these working pressure tables of industrial and mineral enterprises and institutions sharply increases, from reducing time, manpower, the financial resources that censorship is spent; Collateral security production or scientific research are normally carried out, many users wish urgently that calibrating department can go to the factory, go to carry out the calibration operation of working pressure table to applying unit or workshop, this with regard to urgent hope can have a kind of in light weight, volume is little, be easy to carry and function is more complete, can carry out the pressure gauge tester of calibration operation in-0.1～60MPa(or-0.1～40MPa) scope.The existing pressure gauge tester of China is broadly divided into two big classes: 1. hand: such checker produces needed force value of calibrating or thin null value with manual manipulation.This type of checker can be divided into lever checker and hand wheel type checker again, the lever checker is representative with LYL type tensimeter, the dual-purpose checker of oxygen gauge that Xuzhou Standard Metering Technical Developing Inst. produces, it can only be actuating medium with liquid, be used to examine and determine the tensimeter of the measurement upper limit more than 0.25MPa, its overall dimensions are 600 * 340 * 380mm, and weight is 32kg.The hand wheel type checker also can be divided into two kinds: the YJY-600 type pressure gauge tester that more than one extra large instrument and meter for automation four factories produce is representative, can only with liquid actuating medium also, only be used for calibrating and measure the upper limit at the above tensimeter of 0.25MPa, this kind checker weight is more than 10 kilograms.Though and a kind of 271.01 type pressure gauge testers of Xian Instrument Factory production can be actuating medium with liquid, air simultaneously, sky is the highest can only to be reached-0.082MPa but dredge, the thin reciprocal of duty cycle of failing to reach JJG52-87 national metrological verification regulations regulation should reach the requirement of local atmospheric pressure more than 90% (also be-about 0.09MPa), so can not be used to examine and determine vacuum meter strictly speaking, and, the maximum pressure of this checker calibrating can only reach 6MPa again, therefore measurement range is too narrow, usable range is very limited, about 12 kilograms of the weight of this verification.Another kind of then be YZQ-1 type pressure, the vacuum meter checker that Quanzhou City pilot plant of the First Astronautic Research Institute for Measurement and Test produces, the patent No. is 88217634.X, though it is simple in structure, but it is to be actuating medium with the air, be used to examine and determine-tensimeter and the vacuum meter of 0.1～0.5MPa, this checker physical dimension 520 * 310 * 240mm, weight 22Kg.2. electrodynamic type: such checker is power with the power supply, produces needed force value of calibrating or thin null value by compression pump (compressor) and vacuum pump.The ZK01 vacuum meter checking table of producing as Jiangyin, Jiangsu Chang Jing instrument plant can only be used to examine and determine vacuum meter.ZK02 type vacuum, the dual-purpose checking table of pressure only are used for calibrating-0.1～0.4MPa vacuum meter and tensimeter.Another kind of automatically controlled oil, the dual-purpose checking table of atmospheric pressure also only are used to examine and determine the tensimeter in 0～60MPa scope.The pneumatic checking table of YXYT-75 type tensimeter of Shanghai Pressure Reducer Factory and Jintan, Jiangsu county instrument check device instrument factory Joint Production also only is used to examine and determine the tensimeter in 0.06～60MPa scope in addition.All electrodynamic type checking tables are owing to all be furnished with devices such as motor, compression pump (compressor) or vacuum pump, and therefore whole checking table profile is all comparatively huge, weight is very heavy.As ZK01 type vacuum meter checking table, its length * wide * height is 600 * 360 * 1200mm, and weight 75Kg can't carry at all.

In sum, the existing pressure gauge tester of China has two weak points at present: 1. physical dimension is big, and Heavy Weight is not easy to carry.2. measurement range is narrow, and the separate unit checker all can not cover-0.1～60MPa(or-0.1～40MPa) the most frequently used like this tensimeter, the calibrating scope of vacuum meter.Therefore calibrating department is difficult to carry down unit, the manometric calibration operation of carrying out the work goes to the workshop.

The purpose of this utility model design is a kind of novel, with precision pressure gauge, accurate vacuum meter is the checker that standard comes calibration operation tensimeter, pressure vacuum meter and vacuum meter to use, it both can be with liquid as actuating medium, again can be with air as actuating medium, checker calibrating scope can be reached-0.1～60MPa, meet the requirement of JJG52-87 national metrological verification regulations.Stipulate according to the JJG52-87 national metrological verification regulations, for measuring the tensimeter that the upper limit is not more than 0.25MPa, actuating medium must be nontoxic for air or other, the gas of stable chemical performance, for measuring the tensimeter of higher limit greater than 0.25MPa, actuating medium should be liquid.The utility model also has (net weight is no more than 7.5Kg) in light weight, physical dimension is little, and (length * wide * height is no more than 330 * 240 * 160mm after taking off pistol, characteristics portable like this, multi-functional checker, it is suitable for the testing person and carries the manometric calibration operation of carrying out the work of going to the factory, go to the workshop.

This checker is by lever air pump of a hand wheel type liquid pump, two setting pressure table valve seats, and two connecting pipes (copper pipe or steel pipe), a flexible pipe and a support are formed.Liquid pump and two valve seats communicate by two connecting pipes, they and complete checker of all rack-mount composition of air pump, and its general assembly (TW) is no more than 7.5Kg, when carrying, unload handwheel on the liquid pump, its physical dimension length * wide * height is no more than 330 * 240 * 160mm, so be easy to carry.Not only can be during work with air as actuating medium but also can be with liquid as actuating medium, its verification scope can reach-0.1～60MPa

The utlity model has in light weight, volume is little, characteristics such as multiple functional calibrating wide ranges, simple, convenient good reliability are easy to carry about with one.

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of facing of the present utility model.

Fig. 2 is a plan structure synoptic diagram of the present utility model.

Fig. 3 is the air pump structural representation.

Fig. 4 is air pump gas admittance valve and vent valve flap structural representation.

Fig. 5 is the liquid pump structural representation.

Among the figure: 1 is left valve seat; 2 is pipeline; 3, be air pump; 4, be that right valve seat 5 is support; 6 is liquid pump; 7 is flexible pipe; 8 is handwheel; 9 chew for connecing; 10 is depression bar; 11 is pillar; 12 chew for connecing; 13 chew for external connecing; 14 is external valve; 15 is air release; 16 is cramp frame; 17 is leg; 18 is worktable; 19 is cylinder barrel; 20 is piston; 21 is vent valve; 22 is gas admittance valve; 23 is flap; 24 is flexible pipe; 25 are dustproof (oil) device; 26 is silk screen; 27 is rubber diaphragm; 28 is guide pole; 29 is screw mandrel; 30 is cylinder barrel; 31 is piston; 32 is the O RunddichtringO; 33 is bowl ring; 34 is bonnet.

As figure, each one of four leg 17(are arranged all around below the support 5), when work,, three legs on support front and right side are clamped on the end of any one worktable 18 with three cramp frames 16.As long as can guarantee that certainly checker can be more stable when work, also allow to adopt other method that support is laid and be stabilized on the worktable.

When the calibrating vacuum meter, can and be installed in respectively as the accurate vacuum meter that standard is used in the pressure tapping of left valve seat 1 and right valve seat 4 tested vacuum meter, external on the bonnet of one end and liquid pump 6 connect chew 13 and join, the other end then with the air pump system in connecing on dustproof (oil) device chew 9 and link to each other, air pump 3 is positioned at the utility model central authorities and swings up and down depression bar 10 on the air pump 3, piston is moved up and down in cylinder barrel, can produce the needed thin null value of calibrating.Maximum dredge sky and can reach-more than the 0.092MPa, and the handwheel 8 on the rotation liquid pump 6, make piston in the liquid pump in tube when mobile, then can realize dredging the fine setting of null value, make thin sky reach the needed exact value of calibrating, when reducing when dredging null value, the air release 15 that can open a little on the left valve seat 1 can be realized.And when examining and determine when measuring higher limit and being not more than the tensimeter of 0.25MPa, tested table and standard scale can be installed on respectively on two valve seats equally, at this moment an end of flexible pipe 7 still with the liquid pump bonnet on external connecing chew 13 and join, the other end then answers reconfiguration to chew on 12 to connecing of air pump vent valve, the depression bar 10 that shakes up and down on the fortune pump can produce the needed force value of calibrating, and the needed pressure fine setting of when calibrating still realizes by the handwheel 8 on the rotation liquid pump, can open air release 15 equally when reducing pressure, but, for utilizing air pump generally only to allow to boost to about 0.16MPa the serviceable life that prolongs flap 23 in the air pump, this moment is if also need to boost, can close external valve 14 earlier, rotate handwheel 8 on the liquid pump, make in the liquid pump piston 31 move (can in advance piston be placed a more outer position before calibrating) inwards, its maximum pressure value that boosts will be not less than 0.25MPa.When higher limit is measured in calibrating greater than the tensimeter of 0.25MPa, stipulate that according to the JJG52-87 measurement verification regulations its actuating medium should use liquid instead so, at this moment flexible pipe one end still with the liquid pump bonnet on external connecing chew 13 and join, the other end should insert in the bottle of preprepared transformer oil (or castor oil), rotate handwheel 8 on the liquid pump, oil is sucked in the liquid pump, can shut the logical external external valve of chewing 14 that connects on the liquid pump bonnet after treating all to be filled in liquid pump and the connecting pipe oil, on two valve seats, install tested tensimeter and precision pressure gauge equally, handwheel 8 can be made and compress into the row calibrating on the rotation liquid pump, and the producible maximum pressure of this liquid pump can reach more than the 60MPa.And the fine setting of pressure and decline still realize by rotating handwheel 8.

When actuating medium changes air into by liquid, should be earlier with the row of the liquid in the checker, wash clean.

Force value and thin null value required during this checker calibrating only need the armrest operation to obtain, and be laborsaving during operation, convenient, safe, reliable.

Certainly, the utility model can be according to practical needs, and manufacture the different model checker of calibrating scope for-0.1～40MPa and-0.1～40MPa.

Air pump 3 is installed on the support 5 with vertical direction roughly, is by bearing pin air pump bottom and support to be connected together.Air pump 3 is by depression bar 10, cylinder barrel 19, piston 20, gas admittance valve 22, vent valve 21 and dustproof (oil) device 25, and flexible pipe 24 is formed.Depression bar 10 is a Metallic rod, be connected with bearing pin with the piston rod upper end, one end of depression bar 10 also is connected with pillar 11 with bearing pin, 11 on pillar is fixed on liquid pump 6 and the support 5, the depression bar other end by hand, piston 20 external diameter φ 32, the about 35mm of stroke seals by an O RunddichtringO between piston and the cylinder barrel 19.All have a flap 23 to play the automatic open close air flue in gas admittance valve 22 and the vent valve 21, flap 23 is through on the metal guide pole 28 by rubber diaphragm 27 to be formed, and metal guide pole 28 is Metallic rod of a similar pin of external form.The effect of metal guide pole has two: the first increases flap 23 weight, and it two is to play the guiding role, and the flap of having opened when making the piston stop motion 23 is easy to landing, and rubber diaphragm just in time is attached on the aperture, works the air flue effect of closing.The pressure differential of gas can make the flap unlatching automatically or close tightlyer in the air flue simultaneously, thereby plays the autovalve effect.For preventing to bring dust when air-breathing into or grease causes autovalve to lose efficacy, be provided with dustproof (oil) device 25, thin copper wire net 26 or other dustproof thing are housed in interior, dustproof (oil) device is directly fixed on the support 5, communicates with gas admittance valve 22 usefulness flexible pipes 24.

Liquid pump 6 is by handwheel 8, compositions such as cylinder barrel 30, screw mandrel 29, piston 31, bonnet 34.Piston 31 diameters are φ 16mm, and two oil resistant rubber O-ring seals are arranged on it, and one is bowl RunddichtringO 33, and another is an O RunddichtringO 32, and such piston structure makes in the cylinder barrel and all can seal when high pressure or thin sky.Internal diameter of cylinder is φ 16mm, the second half section external diameter is φ 42mm, preceding half section external diameter is φ 32mm, so both proof strengths, weight reduction again, it is square tooth or the trapezoidal tooth of 3mm that screw mandrel adopts pitch, the influence of coaxiality error when connecting with elimination processing and assembling with the piston employing is unsteady, the about 125mm of throw of poston.Handwheel diameter phi 200mm casts with alloy aluminum, and with weight reduction, the handwheel center cooperates with screw mandrel with square opening, is easy to tearing open and adorning of handwheel like this when carrying.There is bonnet 34 at the liquid pump rear portion, and passage is arranged on it, and one will communicate with pipeline 2, and another is with external valve 14 and externally chew 13 and communicate.

The valve seat 1 and 4 of band pressure tapping all is a kind of device that has valve and pressure tapping, but the structure of an air release 15 more than the left valve seat 1.

Support 5 is welded by angle bar, has not only guaranteed rigidity but also weight reduction.

Flexible pipe 7 and 24 can adopt plastic tube, and pipe is crushed when preventing to vacuumize, and can wear a thin volute spring in the pore.

Claims (4)

1, a kind of by air pump 3, liquid pump 6, the valve seat (1 of band pressure tapping, 4) connecting tube 2, support 5, the portable multi-functional pressure table vacuum meter checker that flexible pipe 7 is formed, wherein air pump is by depression bar 10, cylinder barrel 19, piston 20, gas admittance valve 22, vent valve 21, and dustproof (oil) device 25, flexible pipe 24 is formed, it is characterized in that pipeline 2 is communicated with the valve seat 1 and 4 of liquid pump 6 and the pressure tapping of two bands, flexible pipe 7 one ends and liquid pump 6 join, the other end can be connected with air pump 3, the valve seat 1 and 4 of liquid pump 6 and the pressure tapping of two bands is mounted on the support 5, air pump 3 is positioned at the utility model central authorities, and air pump 3 is connected on the support 5 with bearing pin with the bottom of vertical position roughly.

2, portable multi-functional pressure table vacuum meter checker according to claim 1 is characterized in that in air pump 3 inherent gas admittance valves 22 and the vent valve 21 flap 23 being arranged respectively.

3, portable multi-functional pressure table vacuum meter checker according to claim 2 is characterized in that flap 23 is through on the metal guide pole 28 by a slice rubber diaphragm 27 to form.

4, portable multi-functional pressure table vacuum meter checker according to claim 1 is characterized in that actuating medium can be liquid or air.

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