CN102305690A - On-site full-automatic pressure calibrator - Google Patents
On-site full-automatic pressure calibrator Download PDFInfo
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- CN102305690A CN102305690A CN201110138621A CN201110138621A CN102305690A CN 102305690 A CN102305690 A CN 102305690A CN 201110138621 A CN201110138621 A CN 201110138621A CN 201110138621 A CN201110138621 A CN 201110138621A CN 102305690 A CN102305690 A CN 102305690A
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Abstract
The invention discloses an on-site full-automatic pressure calibrator. The on-site full-automatic pressure calibrator comprises a shell, a power supply switch, a plurality of interfaces, a display, control components such as a keyboard and the like, a gas pressure generation unit, a power supply unit, a pressure detection unit, and a gas pressure control unit, wherein the gas pressure generation unit is a miniature gas pressure pump which is communicated with atmosphere; a pressure output pipeline is communicated with the gas pressure control unit; the pressure output ends of the pressure control unit are communicated in parallel and are used for accommodating a pressure standard machine in the pressure detection unit and a pressure joint of a meter to be detected; the pressure control unit is in signal connection with the pressure standard machine in the pressure detection unit; and the power supply unit is electrically connected with the gas pressure generation unit, the pressure control unit and the pressure standard machine in the pressure detection unit respectively. The on-site full-automatic pressure calibrator does not need external gas cylinders or alternating current (AC) power supplies, can automatically generate gas pressure and accurate standard pressure, has light self weight and small volume, is convenient to carry on site, and can automatically calibrate various on-site pressure meters.
Description
Technical field
The invention belongs to the measurement and calibration field of pressure tool instrument, relate generally to the auto-calibration in this field, particularly relate to a kind of auto-calibration equipment that is easy to carry and manometer is calibrated to the scene.
Background technology
Employed tensimeter in fields such as commercial production, pressure survey in use for some time, all will carry out field-checking or calibration to it, to confirm whether this tensimeter is accurate.
Common pressure calibration instrument is in the pressure calibration pipeline of a certain sealing, produces gaseous tension through manual pressure, and reads the manometer indicating value through observation, by the manual pressure mode, gaseous tension is regulated.The effect of its adjusting is at the pressure output end mouth, and a certain gaseous tension accurately is provided, and it as normal pressure, is inserted and be calibrated manometer, is used for various manometers are calibrated.
This traditional personnel observation, manual pressure is regulated the pressure calibration mode of pressure, and observational error is big, wastes time and energy.Especially in industry spot or in the slight pressure scope, when carrying out pressure detection, manual adjustments pressure is difficult for stable, and observation is subjected to the artificial interference factor affecting bigger, and work efficiency is low.
In order to address this problem, improve the work efficiency of pressure detection, in recent years, offshore company has developed common pressure controller.This pressure controller and external gas cylinder have together constituted an apparatus system.In the pressure calibration pipeline of sealing,, gaseous tension is provided by gas cylinder according to set pressure; Through the automatic monitoring of pressure transducer and the automatic control of pressure governor; A certain set pressure output is provided, inserts and be calibrated manometer, be used for manometer is calibrated automatically.This method has overcome the shortcoming of personnel's observation and manual pressure adjusting pressure, can monitor and regulate pressure automatically, has significantly improved work efficiency.
But common pressure controller is because own vol is big, adopt ac power supply, the long-pending big and place restriction etc. that is subjected to the gas cylinder chemical gas of external gas bottle, and pressure controller can not carry.For the manometer that lots of field is used, exist and to implement the shortcoming of calibrating at the scene.
Summary of the invention
The purpose of this invention is to provide a kind of robotization normal pressure correcting device that is easy to carry, is suitable for using in industry spot that can overcome above defective is on-the-spot full-automatic pressure tester.
For realizing above-mentioned purpose, the present invention takes following technical scheme:
A kind of on-the-spot full-automatic pressure tester; It comprises housing; Be combined in the power switch of housing appropriate location; A plurality of interfaces; Display; Operating elements such as keyboard and be combined in the gaseous tension generating unit in the housing; Power supply unit and pressure sensing cell; Also comprise the gaseous tension control module; Said gaseous tension generating unit is a gas boosting pump that is communicated with atmosphere; Its pressure output channel is communicated with said gaseous tension control module, and the pressure output end parallel connection of pressure control unit is communicated with and is used for installing the pressure criteria device of pressure sensing cell and the compression fittings of seized table; Pressure control unit is connected with pressure criteria device signal in the pressure sensing cell, power supply unit respectively with gaseous tension generating unit, pressure control unit and pressure sensing cell in the pressure criteria device be electrically connected.Wherein:
Said gas boosting pump comprise motor, excentric shaft, fork, the pump housing, about two cylinder bodies, piston rod and the check valve body and the cylinder cap that are connected with two cylinder bodies; The pump housing is a link, and motor is fixed on the pump housing, and motor shaft stretches into the pump housing and is connected with excentric shaft; Excentric shaft is cylindric, and an end has the drive pin that deviates from the axle center, passes a mounting hole of flat fork through drive pin; Fork is connected on the horizontally disposed piston rod through screw; Piston rod is cylindric, its two ends be equipped with O-ring seal and stretch into respectively about two cylinder bodies; Cylinder body is a cylinder-like structure, and two cylinder bodies are installed in the two ends of the pump housing respectively; Two cylinder body outer ends are installed check valve body and cylinder cap more successively, and check valve body is communicated with inner chamber of cylinder block, and are communicated with outside air or compressed air piping through the passage of cylinder cap.
In the gas boosting pump, said piston rod forms sealing through the O-ring seal that is installed in two ends at inboard wall of cylinder block; Fork swing drive piston rod in two cylinder bodies along the axis to-and-fro movement;
In the gas boosting pump, the cylinder body right ends is all installed two reverse check valve body, and one of them check valve body is communicated with outside air, and another check valve body is communicated with compressed air piping.
In the gas boosting pump, said check valve body is assembled by cavity sealing, elasticity arm, metal gasket and O-ring seal, and wherein, elasticity arm is extended internally by the cavity sealing, and is connected the bottom fixed seal ring of metal gasket with the upper end of metal gasket.
Above on-the-spot full-automatic pressure tester, said power supply unit is battery self-contained electric system or external power supply.
Said pressure control unit comprises pressure controller and Single Chip Microcomputer (SCM) system; Wherein: the air path part of pressure controller comprises gas admittance valve, impact damper, minute-pressure governor motion, vent valve and a normal pressure output terminal, and the normal pressure output terminal is established two compression fittings of parallel connection; Gas admittance valve is communicated with the gases at high pressure output pipe of gas boosting pump; Impact damper is one and is used for pressure chamber stable and that store the pressed gas of being exported by gas admittance valve; The outlet side of impact damper is communicated with the cylinder in the said minute-pressure governor motion; Plunger in this cylinder links to each other with a screw mechanism; Vent valve be installed on the pressure output pipe and with atmosphere in order to emission gases pressure, the normal pressure output terminal is parallelly connected with vent valve to be installed on the pressure output pipe; The control section of pressure controller comprises a pressure controlling driving circuit; This circuit is electrically connected with power supply unit, and is connected with gas admittance valve, vent valve and screw mechanism signal; Single Chip Microcomputer (SCM) system comprises the control chip that is loaded with the pressure control algorithm, and disposes a plurality of interfaces; Control chip is connected with the pressure controlling driving circuit, exports normal pressure accurately through driving circuit controlled pressure output pipe.A plurality of interfaces of said Single Chip Microcomputer (SCM) system configuration are digital communication interface, display interface device, keyboard interface that is connected with the pressure criteria device and the RS232 interface that is connected with external equipment.The exhaust end of said vent valve also is equiped with exhaust box.
In the above on-the-spot full-automatic pressure tester, said pressure criteria device is modular pressure, precision digital tensimeter, digital pressure calibration instrument or intelligent digital pressure calibration instrument.
The present invention has following characteristics owing to take above design:
(1) need not the outer power supply that exchanges, the scene is easy to carry;
(2) need not external gas cylinder, dwindled weight and volume, the scene is easy to carry.
(3) the on-the-spot continued power characteristic of battery can be implemented pressure calibration at the scene.
(4) multiple on-the-spot manometer is calibrated automatically.
It need not external gas cylinder and AC power, and gaseous tension can take place automatically.In the pressure calibration pipeline of sealing, through to the automatic measurement and the regulating and controlling of pressure take place certainly,, take place or produce a certain gaseous tension accurately at the pressure output end mouth, it as normal pressure, is offered and be calibrated manometer.It adopts self powered battery, need not external AC power supply.It also adopts the micro pressure pump generation gaseous tension of self, offers the pressure calibration loop, need not external gas cylinder.Dwindled own wt and volume so greatly, the scene is easy to carry.When realizing the auto-calibration manometer, significantly improving work efficiency, implement field calibration for the manometer that lots of field is used, thereby can carry out auto-calibration multiple on-the-spot manometer.
Description of drawings
Fig. 1 is the on-the-spot full-automatic pressure tester of the present invention arrangement plan.
Fig. 2 is an inner body pie graph of the present invention.
Fig. 3 is the pie graph of pressure control unit among Fig. 2.
Fig. 4 is preferred micro pressure pump configuration figure among the present invention.
Fig. 5 is preferred for the one-way valve structures figure in the micro pressure pump among the present invention.
Fig. 6 is the power supply/charge control circuit that is used for the present invention.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3; On-the-spot full-automatic pressure tester provided by the present invention; Comprise a housing 9; Be assembled in gaseous tension generating unit 1, pressure control unit 2, power supply unit 3 and pressure sensing cell 4 in the housing 9 respectively, place housing 9 display screen 91, keyboard 92 and convenient use the and appropriate electric signal delivery outlet 93, power switch 94 and the RS232 interface 95 etc. that distribute topmost.Wherein, gaseous tension generating unit 1 is established the gas circuit input end (inlet end) 96 that is communicated with atmosphere, and its output terminal is communicated with pressure control unit 2, and the gas circuit output terminal 29 of pressure control unit 2 is communicated with pressure sensing cell 4 (thick line representes that gas circuit connects among Fig. 2); Pressure control unit 2 also is connected (among Fig. 2 fine rule represent data-signal connect) respectively and is used for pressure control with gaseous tension generating unit 1, pressure sensing cell 4 signal wires; Power supply unit 3 is connected (the medium-coarse lines among Fig. 2 represent power lead connect) with pressure generating unit 1, pressure control unit 2 and pressure sensing cell 4 with electric wire respectively and is used for power supply.Wherein:
Gaseous tension generating unit 1 is through a gas boosting pump generation gaseous tension, and the direct and atmosphere of air lift pump produces gaseous tension through pressurized air, need not external gas cylinder.In theory, any ability all can be used through the air pump that pressurized air produces gaseous tension in the present invention, the preferential independently developed gas boosting pump of request for utilization people among the present invention.This gas boosting pump has the functional characteristic of automatic pressurization, moulding pressure height and high-level efficiency pressurization, and has adopted high pressure retaining valve technology.
The gas boosting pump that is used for the present invention is high-voltage bidirectional miniature electric air pump (a micro pressure pump); Its structure is referring to shown in Figure 4; Comprise motor 11, excentric shaft 12, fork 13, the pump housing 14, left cylinder 15 and right cylinder body 15 ', check valve body 16 and piston rod 10; Wherein: the pump housing 14 is a link; Motor 11 is fixed on the pump housing 14 by electric machine support 112, and motor shaft stretches under the pump housing 14 through shaft coupling 113 and links together with excentric shaft 12; Excentric shaft 12 is cylindric, and an end has the drive pin 121 that deviates from the axle center, and drive pin 121 passes a mounting hole of flat fork 13; Another mounting hole that screw 111 passes fork 13 is connected in fork 13 on the piston rod 10 of horizontal direction; The gap of fork 13 and piston rod 10 can be regulated through the mounting distance that screw 111 provides voluntarily; Piston rod 10 is a cylindrical-shaped structure, and at its two ends O-ring seal 19 is installed; Piston rod 10 two ends are stretched into left cylinder 15 and right cylinder body 15 ' respectively; Cylinder body is a cylinder-like structure, two cylinder bodies 15 and the 15 ' two ends that are installed in the pump housing 14 respectively; Piston rod 10 forms sealing through the O-ring seal 19 that is installed in two ends at cylinder body 15 and 15 ' inwall; The cylinder body 15 at two ends and 15 ' symmetric double are after assembling; Drive piston rod 10 along the axis to-and-fro movement during fork 13 swings; The O-ring seal 19 at two ends becomes piston rod 10 guide collar simultaneously, has realized on the structure having realized air pump transmission and sealing from the mode of aligning guiding; Two cylinder bodies 15 and 15 ' outer end are installed cylinder pad 18, check valve body 16 and cylinder cap 17 more successively, are fixedly mounted on the two ends of the pump housing 14; Two reverse check valve body 16 are installed at its middle pump body 14 two ends respectively; Check valve body 16 is communicated with cylinder body 15 and 15 ' inner chamber; And the passage through cylinder cap 17 is communicated with outside air or compressed air line, and the installation of check valve body 16 is identical with air inlet and the outgassing direction of Fig. 4 and Fig. 5.
Here; Check valve body 16 structures are referring to Fig. 5; It comprises cavity sealing 161, elasticity arm 162, metal gasket 163 and O-ring seal 164; Wherein, cavity sealing 161 is a loop configuration, is the outer support and the sealing of total; Be installed on the interplanar (between cylinder cap and the cylinder body) of two needs sealings; Form seal chamber, also the sealing of structure is as a whole processed with elastic material; Elasticity arm 162 utilizes the elasticity of its rubber to stretch, elasticity arm 162 bottoms and metal gasket 163 top butts for by cavity sealing 161 list structures that extend internally; Metal gasket 163; Be shaped as discoid; The expression in the eyes end that upper, annular draw-in groove 131 is used for inlaying elasticity arm 162 makes it be stuck in this draw-in groove 131 and makes and connects with metal gasket 163 tops below the elasticity arm 162, and an annular groove 132 is established in the bottom of metal gasket 163, places O-ring seal 164 in it; O-ring seal 164 is " O " RunddichtringO of standard, is fixed in the lower recess 132 of metal gasket 163.In the installation; The airintake direction of check valve body 16, outgassing direction are consistent with the inlet, outlet direction shown in the micro pressure pump 1 (Fig. 4); Form unidirectional air inlet: when gases at high pressure are discharged (exhaust); Cylinder body 15 pistons 10 make the gas in the jar compression to left movement; Be loaded on retaining valve 16 work of below; The metal gasket 163 that promotion studs with " O " RunddichtringO 164 1 sides moves (moving by outgassing direction); O-ring seal also moves thereupon; Check valve body 16 is in open mode, and the gases at high pressure of compression are pushed in the gases at high pressure output pipe through gas passage; In cylinder body 15 inner piston rods 10 backstrokes; Elasticity arm 162 drives metal gasket 163 counter motions (pressing the reverse of airintake direction); Compresses seal 164 makes it to produce flat seal, and gases at high pressure are closed in the needed cavity like this, has accomplished the requirement of sealing high pressure.When outside air sucks (air-breathing); Cylinder body 15 pistons 10 move right and make gas in the jar form negative pressure; Be loaded on retaining valve 16 work of top; The metal gasket 163 that promotion studs with " O " RunddichtringO 164 1 sides moves (moving by Fig. 5 outgassing direction); O-ring seal also moves thereupon; Check valve body 16 is in open mode, and outside air is inhaled in the cylinder body 15 through gas passage; Gases at high pressure and external environment condition are kept apart in cavity sealing 161 in whole process, elasticity arm 162 support metal pads 163 and 1 O-ring seal 64 through being attached thereto simultaneously, formation integral sealing.Because at the pump housing 14 every ends the reverse mutually installation of two check valve body 16 is arranged all, a control is air-breathing, another controls exhaust, in the to-and-fro movement of piston 10, forms direction motion of gas like this, when gas is placed on confined space, produces pressure gas.
This structure mini forcing pump is when work, and motor 11 drives excentric shaft 12 and rotates, and the drive pin on the excentric shaft 12 makes that through fork 13 and screw 111 pulling piston rods 10 piston rod 10 can to-and-fro movement.The O-ring seal 19 that piston rod 10 is installed through two ends forms sealing with cylinder body 15; With left hand cylinder partly is example; The production process of gases at high pressure is described: when piston rod 10 when move in the right; Left side cylinder body 15 volume inside increase rapidly; In the cylinder body 15 inner negative pressure that form; Make the check valve body 16 of left upper portion be in suction condition (oppositely placing nonreturn valve core opens), air outside is inhaled into cylinder body 15, and fork 13 runs to the right side extreme position; Should reverse check valve body 16 of placing close, accomplish breathing process; When piston rod 10 during to left movement; Cylinder body 15 inner sealing gas in left side are compressed; Pressure progressively raises; Make the check valve body 16 of bottom, left side be in exhaust condition (forward is placed nonreturn valve core and opened); Pressurized air is discharged; Move to the left side extreme position, the check valve body 16 that this forward is placed is closed, and accomplishes exhaust (output high pressure compressed gas) process.Driven by motor excentric shaft 12 drives piston rod 10 to-and-fro movements through fork 13 again, and breathing process and exhaust process constantly repeat, and gas constantly is compressed, and produces gases at high pressure.And symmetric double to place cylinder 15 and 15 ' can in a circulation, accomplish suck air for twice from the external world and with cylinder in the pressure gas discharge, also improved efficient.
Gaseous tension generating unit 1 produces end for the high pressure among the present invention; Utilize the micro pressure pump to suck air, pressurized air from the external world and pressure gas is gone out to produce high pressure through row of conduits; Cooperate pressure controller and pressure criteria device to realize the real-time measurement and the transmission of pressure again; Through automatic measurement and regulating and controlling to pressure; Take place or produce a certain gaseous tension accurately at the pressure output end mouth; It as normal pressure, is offered and be calibrated manometer.
Miniature pressure inlet valve 21 communicates the high pressure gas pump 1 as a pressure controller output pressure line input of the pressure output of the pressure controller 29 is connected in parallel two pressure connections 26 and 27, a buffer 22 with a fixed shapes (such as elliptical columnar shape) of the pressure receiving chamber, the main valve 21 for filtering the intake air flow into the fluctuation of gas pressure, and storage stability; gas into the buffer 22 through the micro-pressure adjusting mechanism 23, the micro-pressure adjusting mechanism 23 comprises an air cylinder mounted on the cylinder and the plunger, the plunger is connected with a screw mechanism (refer to the pressure generator ZL200720190548.2 automatic fine structure), and the pressure-regulating screw mechanism driving circuit 20 is connected, by the pressure-regulating drive circuit 20 controls the feed screw mechanism driven by the plunger in the cylinder to produce linear displacement motion, thereby changing the volume of the cylinder and the gas compressed air output, the output of the gas pressure through the pressure regulating mechanism 23 of the micro pressure to achieve accurate after control and regulation.Vent valve 24 is installed on the output pipe in order to emission gases pressure, and its regulation and control driving circuit 20 controls that are stressed open and close the adjusting of carrying out the gaseous tension discharging, and it can also connect an exhaust box 25, and purpose is the gas current friction sound when eliminating the gaseous tension discharging. Compression fittings 26,27 is identical with the assurance output pressure with vent valve 24 gas circuit parallel connections.The control function of pressure controlling driving circuit 20 is to be accomplished by control chip 28 drivings of Single Chip Microcomputer (SCM) system, mainly the on off state of gas admittance valve 21, vent valve 24 is implemented electronic control, realizes that gas flows into or the pressure controlling of discharging; And pass through the displacement movement enforcement control of the feeding of control screw mechanism to plunger in the minute-pressure governor motion 23, change the regulation and control of realization output pressure through gas compression volume in the cylinder.
Single Chip Microcomputer (SCM) system comprises the control chip 28 and the display interface device of embedding; Keyboard interface and digital communication interface; Also can establish RS232 interface 95; The pressure control algorithm (like known special-purpose Adaptive PID Control algorithm) that embeds in the controller chip 28; The digital communication interface of this Single Chip Microcomputer (SCM) system; Receive the pressure survey numerical value of pressure criteria device (standard scale or sensor); Through with chip in predefined force value compare; The pressure control algorithm carries out controlled quentity controlled variable according to difference and calculates; And the controlled quentity controlled variable of calculating flowed to pressure controlling driving circuit 20 respectively; Realize gas admittance valve 21 by pressure controlling driving circuit 20; The FEEDBACK CONTROL that pressure accurately takes place is implemented in the control of vent valve 24 and minute-pressure governor motion 23; Control chip 28 has been formed the pressure output control unit with pressure controlling driving circuit 20 and pressure criteria device 6, carries out the real-time control of pressure output; Control chip 28 has been formed the pressure testing and controlling unit with pressure controlling driving circuit 20, measurement instrument 7, Single Chip Microcomputer (SCM) system externally connected with display screen 91 and keyboard 92; By keyboard 92 input set pressure and program control operation data parameters, show pressure control result and curve by display screen 91.RS232 interface 95 gives in the testing environment with good conditionsi and uses, and can be connected with other external equipment such as external computing machine (referring to shown in Figure 2), printer etc.
Thus; Pressure control unit is in the pressure calibration pipeline of sealing; Through the meticulous adjusting of multichannel pressure control variable valve (gas admittance valve, vent valve) and minute-pressure governor motion, gaseous tension is set control, export gaseous tension accurately at the pressure output end mouth.Export gas pressure value accurately according to this, accurately calibrate being calibrated tensimeter.
Used battery-powered unit can be conventional DC power-supply system among the present invention; The electric power system of control function that preferably has powered battery monitoring, control and protection, battery-powered and charging; Wherein use the power supply/charge control circuit among the ZL200620119089.4 " a kind of power supply-charging circuit "; Referring to shown in Figure 6; Wherein the AC/DC power end links to each other with external power supply; The instrument power supply end is a current output terminal, send to other unit in the pressure testers respectively by shown in Figure 2.This power supply unit can guarantee that the direct current supply performance is good, does not have power supply and is interrupted; Charging performance to battery is good, makes battery safe in utilization, and long working life is used for pressure testers and makes it to detect accurate, safe and reliable, and the working time is long, and on-the-spot the use is easy to carry.
Pressure sensing cell 4 comprises a pressure criteria device at least, and pressure criteria device 6 is installed on one of the pressure output end 29 of the pressure controller compression fittings 26, and seized table 7 is installed on pressure output end 29 another compression fittings 27 of pressure controller.Pressure criteria device 6 can be modular pressure, precision digital tensimeter, digital pressure calibration instrument, (absolute pressure) digital pressure gauge or intelligent digital pressure calibration instrument, preferably is equipped with the pressure criteria device of a plurality of different ranges in the pressure testers so that all can calibrate the seized table of different ranges.On pressure criteria device 6 cut-in pressure joints 26; To different pressure limits; The standard scale of changing corresponding range (as shown in fig. 1; Can use with solid line and represent the modular pressure that is communicated with; Also can change and use the standard scale that is represented by dotted lines connection) make not constrained of pressure survey and range of control, accuracy of measurement is not subjected to the influence of range.Pressure criteria device 6 is connected (referring to Fig. 3) with the pressure controller signal; In the pressure calibration loop of sealing, gas circuit pressure is measured (observation) in real time; With its continuous pressure data measured; Real-time Transmission is given control chip 28; Be used for output pressure is controlled in real time, and with the final measurement result of controlling of a certain pressure set-point, as the standard value of pressure calibration; Be used for assignment, show by display screen to outputting standard pressure.
More than each unit connect each other and be assembled in the housing; Putting of each unit do not have special restriction (shown in Figure 1 only is a kind of concrete assembling form); Be principle with convenient the use; Can be directly arranged in surface of shell like display, keyboard and power switch, signal delivery outlet, RS232 interface etc., the inlet end 96 of gases at high pressure generating unit 1, the exhaust end 24 of pressure controller 2, compression fittings 26 and normal pressure device 6, compression fittings 27 and seized table 7 stretch out respectively outside the housing 9; Certainly the accessory that lid, handle, braces etc. are convenient for carrying be can also establish on the housing, compact conformation, portable on-the-spot full-automatic pressure tester formed with this.
The on-the-spot full-automatic pressure tester of the present invention need not external gas cylinder; The gaseous tension generating unit produces pressurized air; In the pressure calibration pipeline of input pressure controller sealing; Through the gaseous tension control module gaseous tension that takes place is certainly measured and regulating and controlling automatically; At the pressure output end mouth; Export a certain gaseous tension accurately, it is offered as normal pressure be calibrated manometer, implement the measurement calibration of pin-point accuracy; It adopts self powered battery, need not external AC power supply.This full-automatic pressure tester when significantly improving work efficiency, has dwindled own wt and volume realizing the auto-calibration manometer greatly, and field calibration can be implemented for the manometer that lots of field is used in the scene that is easy to carry.
Claims (10)
1. on-the-spot full-automatic pressure tester; It comprises housing; Be combined in the power switch of housing appropriate location; A plurality of interfaces; Display; Operating elements such as keyboard and be combined in the gaseous tension generating unit in the housing; Power supply unit and pressure sensing cell; It is characterized in that: also comprise the gaseous tension control module; Said gaseous tension generating unit is a gas boosting pump that is communicated with atmosphere; Its pressure output channel is communicated with said gaseous tension control module, and the pressure output end parallel connection of pressure control unit is communicated with and is used for installing the pressure criteria device of pressure sensing cell and the compression fittings of seized table; Pressure control unit is connected with pressure criteria device signal in the pressure sensing cell, power supply unit respectively with gaseous tension generating unit, pressure control unit and pressure sensing cell in the pressure criteria device be electrically connected.
2. on-the-spot according to claim 1 full-automatic pressure tester is characterized in that, said gas boosting pump comprise motor, excentric shaft, fork, the pump housing, about two cylinder bodies, piston rod and the check valve body and the cylinder cap that are connected with two cylinder bodies, wherein:
The pump housing is a link, and motor is fixed on the pump housing, and motor shaft stretches into the pump housing and is connected with excentric shaft;
Excentric shaft is cylindric, and an end has the drive pin that deviates from the axle center, passes a mounting hole of flat fork through drive pin;
Fork is connected on the horizontally disposed piston rod through screw;
Piston rod is cylindric, its two ends be equipped with O-ring seal and stretch into respectively about two cylinder bodies;
Cylinder body is a cylinder-like structure, and two cylinder bodies are installed in the two ends of the pump housing respectively;
Two cylinder body outer ends are installed check valve body and cylinder cap more successively, and check valve body is communicated with inner chamber of cylinder block, and are communicated with outside air or compressed air piping through the passage of cylinder cap.
3. like on-the-spot full-automatic pressure tester as described in the claim 2, it is characterized in that said piston rod forms sealing through the O-ring seal that is installed in two ends at inboard wall of cylinder block; Fork swing drive piston rod in two cylinder bodies along the axis to-and-fro movement.
4. like on-the-spot full-automatic pressure tester as described in the claim 2, it is characterized in that the cylinder body right ends is all installed two reverse check valve body, one of them check valve body is communicated with outside air, and another check valve body is communicated with compressed air piping.
5. like on-the-spot full-automatic pressure tester as described in the claim 4, it is characterized in that said check valve body is assembled by cavity sealing, elasticity arm, metal gasket and O-ring seal; Wherein, Elasticity arm is extended internally by the cavity sealing, and is connected the bottom fixed seal ring of metal gasket with the upper end of metal gasket.
6. on-the-spot according to claim 1 full-automatic pressure tester is characterized in that said power supply unit is battery self-contained electric system or external power supply.
7. like the arbitrary described on-the-spot full-automatic pressure tester of claim 1 to 6, it is characterized in that said pressure control unit comprises pressure controller and Single Chip Microcomputer (SCM) system; Wherein:
The air path part of pressure controller comprises gas admittance valve, impact damper, minute-pressure governor motion, vent valve and a normal pressure output terminal, and the normal pressure output terminal is established two compression fittings of parallel connection; Gas admittance valve is communicated with the gases at high pressure output pipe of gas boosting pump; Impact damper is one and is used for pressure chamber stable and that store the pressed gas of being exported by gas admittance valve; The outlet side of impact damper is communicated with the cylinder in the said minute-pressure governor motion; Plunger in this cylinder links to each other with a screw mechanism; Vent valve be installed on the pressure output pipe and with atmosphere in order to emission gases pressure, the normal pressure output terminal is parallelly connected with vent valve to be installed on the pressure output pipe;
The control section of pressure controller comprises a pressure controlling driving circuit; This circuit is electrically connected with power supply unit, and is connected with gas admittance valve, vent valve and screw mechanism signal;
Single Chip Microcomputer (SCM) system comprises the control chip that is loaded with the pressure control algorithm, and disposes a plurality of interfaces; Control chip is connected with the pressure controlling driving circuit, exports normal pressure accurately through driving circuit controlled pressure output pipe.
8. on-the-spot full-automatic pressure tester as claimed in claim 7; It is characterized in that a plurality of interfaces of said Single Chip Microcomputer (SCM) system configuration are digital communication interface, display interface device, keyboard interface that is connected with the pressure criteria device and the RS232 interface that is connected with external equipment.
9. on-the-spot full-automatic pressure tester as claimed in claim 7 is characterized in that the exhaust end of said vent valve also is equiped with exhaust box.
10. on-the-spot full-automatic pressure tester as claimed in claim 7 is characterized in that, said pressure criteria device is modular pressure, precision digital tensimeter, digital pressure calibration instrument or intelligent digital pressure calibration instrument.
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| CN 201110138621 CN102305690B (en) | 2011-05-26 | 2011-05-26 | On-site full-automatic pressure calibrator |
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| CN 201110138621 CN102305690B (en) | 2011-05-26 | 2011-05-26 | On-site full-automatic pressure calibrator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106184813A (en) * | 2016-08-18 | 2016-12-07 | 武汉市天毅达测控科技有限公司 | Atmospheric parametric synthesis tester |
| CN107643146A (en) * | 2016-07-22 | 2018-01-30 | 北京康斯特仪表科技股份有限公司 | A kind of hand-held Full-automatic pressure calibration instrument |
| CN108918027A (en) * | 2018-09-25 | 2018-11-30 | 龙岩学院 | A kind of pressure sensor calibrating apparatus |
| CN109211465A (en) * | 2018-10-21 | 2019-01-15 | 扬州重科检测校准有限公司 | A kind of pressure meter three-way connector with detection mouth |
| CN112284616A (en) * | 2019-07-25 | 2021-01-29 | 北京康斯特仪表科技股份有限公司 | Gas pressure interface device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643146A (en) * | 2016-07-22 | 2018-01-30 | 北京康斯特仪表科技股份有限公司 | A kind of hand-held Full-automatic pressure calibration instrument |
| CN107643146B (en) * | 2016-07-22 | 2024-08-16 | 北京康斯特仪表科技股份有限公司 | Handheld full-automatic pressure calibrator |
| CN106184813A (en) * | 2016-08-18 | 2016-12-07 | 武汉市天毅达测控科技有限公司 | Atmospheric parametric synthesis tester |
| CN106184813B (en) * | 2016-08-18 | 2018-07-20 | 武汉市天毅达测控科技有限公司 | Atmospheric parametric synthesis tester |
| CN108918027A (en) * | 2018-09-25 | 2018-11-30 | 龙岩学院 | A kind of pressure sensor calibrating apparatus |
| CN109211465A (en) * | 2018-10-21 | 2019-01-15 | 扬州重科检测校准有限公司 | A kind of pressure meter three-way connector with detection mouth |
| CN112284616A (en) * | 2019-07-25 | 2021-01-29 | 北京康斯特仪表科技股份有限公司 | Gas pressure interface device |
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