CN87212862U - Pressure standard meter - Google Patents
Pressure standard meter Download PDFInfo
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- CN87212862U CN87212862U CN 87212862 CN87212862U CN87212862U CN 87212862 U CN87212862 U CN 87212862U CN 87212862 CN87212862 CN 87212862 CN 87212862 U CN87212862 U CN 87212862U CN 87212862 U CN87212862 U CN 87212862U
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- piston
- microcomputer
- pressure
- calibration
- dynamometry
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Abstract
The utility model belongs to measuring apparatus for accuracy of pressure meter. The utility model is composed of a hydraulic servosystem which is formed by making use of servomotor to drive a pressure oil cylinder by a reducer, a measuring force system which is composed of a micro-motor, a piston measuring force device, and a force and electricity sensor, a calibration system which is composed of a calibration piston and a matching poise, and a microcomputer control system, so that automatic measurement for pressure meter can be completed.
Description
The utility model belongs to the pressure fine measuring instrument, is mainly used in manometric calibrating.
At present to manometric calibrating, continue to use piston gage always, though this tensimeter regulator has accuracy height, the steady performance of measurement, but the labour intensity that need pay when measuring is big, as the tensimeter of calibrating 6.0MPa, when doing the gamut calibrating, at least to move the weights of 60kg * 2=120kg, and once can only examine 2 tables, work efficiency is also very low, the current metering of incompatibility of therefore this traditional tensimeter regulator, the needs of research and production development.
The purpose of this utility model provides a kind of employing force cell, microcomputer automatic control and leakage compensation technology, realizes the efficient pressure criteria device of tensimeter calibrating robotization.
Technical essential of the present utility model is: drive the Hydrauservo System that oil pressure cylinder (6) constitutes by servomotor (2) by speed reduction unit (3); Micromotor (8), dynamometry piston apparatus (9) and power electric transducer (10) constitute dynamometric system; Calibration system that calibration piston (12) and supporting weights (26) constitute and Control System of Microcomputer four parts are formed.
Said Hydrauservo System is to drive speed reduction unit (3) by servomotor (2), the output shaft of speed reduction unit (3) connects a leading screw, leading screw is reciprocating by the nut drive pull bar (5) that is contained on pull bar (5) the one end fixed mounts, piston rod (7) is fixed on the other end fixed mount of pull bar (5), reciprocating with pull bar (5), make oily supercharging or step-down in the oil cylinder (6).Oil cylinder (6) is fixed on the main bearing support (4).Pass to each pressure gauge stand (1) and dynamometric system by the pressure oil siphunculus road (14) that produces in the oil cylinder (6).
Said dynamometric system is that a dynamometry piston (16) is housed in dynamometry piston apparatus (9), the lower end of dynamometry piston (16) contacts with pressure oil, its upper end acts on the force-voltage transfer (10), dynamometry piston (16) is fixedlyed connected with friction wheel (18) by connecting rod (17), the same friction wheel of friction wheel (18) (19) is meshed, and friction wheel (19) is contained on the micromotor (8).Make the power of dynamometry piston action on force-voltage transfer (10) become electric signal input Control System of Microcomputer.One end of force-voltage transfer is fixed on the bearing support, and the other end is a suspended wall.In order to prevent that force-voltage transfer (10) from deforming under the deadweight effect, on force-voltage transfer (10), adorn a balance knife rest (11), one end of knife rest (11) links to each other by the suspended wall end of the same converter of tinsel (10), the other end is equipped with balancing weight, in case the used stress section distortion of force-voltage transfer.
Said calibration system is to have adopted traditional first-class pressure criteria device, promptly is made up of calibration piston (12) and supporting weights (26).Its calibration piston (12) is connected with dynamometry piston apparatus (9) by petroleum pipeline (14).When carrying out dynamometric system calibrated, go up the normal pressure of placing supporting weights (26) generation affacts dynamometry piston (16) by oil circuit lower end at calibration piston (12), the upper end of dynamometry piston (16) acts on the force-voltage transfer (10), convert electric signal to by force-voltage transfer and pass to Control System of Microcomputer, dynamometric system is calibrated.At this moment requiring micromotor (8) to drive piston (16) by friction wheel (19), (18) and connecting rod (17) equally rotates.
Said Control System of Microcomputer is after being amplified by amplifier (20) by the electric signal that power electric transducer (10) produces, one the tunnel through A/D converter input microcomputer (22), is printed by microcomputer record back input display (21) demonstration and input printer (23).Microcomputer is also exported the indicating value signal of a series of tested tables after the D/A converter conversion, compare with another road signal input comparator (24) with amplifier (20) output, determine that by comparative result whether servomotor (2) needs starting to make oil cylinder (6) supercharging or step-down, reaches the purpose of pressure automatic control.
Description of drawings and embodiment:
Fig. 1 is the three-dimensional structure diagram of pressure criteria device.
Fig. 2 is the amplification stereogram of pressure criteria device dynamometric system.
Fig. 3 is the axial plane cut-open view of pressure criteria device dynamometry piston (9).
Fig. 4 is the block scheme of pressure criteria device Control System of Microcomputer.
Embodiment
Critical piece of the present utility model is servomotor (2), speed reduction unit (3), main bearing support (4), little oil cylinder (15), pressure gauge stand (1), pressure calibration piston (12), and force-voltage transfer (10), dynamometry piston dress (9) and micromotor (8) are separately fixed on the worktable.Its oil cylinder (6) is connected together by oil pipe (14) with little fuel tank (15), pressure gauge stand (1), T-valve (13), calibration piston (12) and dynamometry piston apparatus (9).The effect that T-valve (13) is installed is when the pipeline pressure testing, blocks the oil circuit that leads to the dynamometry piston apparatus, and prevention dynamometry piston (16) plays protection electric transducer (10) to the impact of force-voltage transfer (10).The effect of miniature fuel tank (15) is to be oil cylinder (6) and oiling of whole pipeline or makeup oil.
The microcomputer that this pressure criteria device adopts is TP801A-B; The center control chip is CPUZ80A; Printer is TP801P; Amplifier is 7650 copped wave operational amplifiers; (25) be stabilized voltage supply; (27) be the hydraulic pressure fine setting.The course of work of this pressure criteria device is: earlier tested tensimeter is contained on the pressure gauge stand (1), opens gate valve and T-valve (13) on the pressure gauge stand (1), be connected to guarantee oil circuit.Energized makes micromotor (9) drive dynamometry piston (16) by friction wheel (19), (18) and connecting rod (17) and rotates.Function selecting with microcomputer (22) " place the measuring position, turn on the power switch, by pressing display key again after the reset key, enter duty after making microcomputer (22) preheating.At this moment the display displayed value is the standard tolerance, regulates zero potentiometer again, and making display is set-point.By the operation key, display (21) shows that " YJ-2 " represents formal armed state again.At this moment import tested manometric number of elements, device to be shown (21) shows after " 10 ", with the input of first tested table numbering, microcomputer (22) automatically records this number, device to be shown (21) shows after " 11 " certainly, with first tested manometric characteristic quantity, promptly tested tensimeter accuracy, the tested gauge measurement upper limit, this calibrating number of times input microcomputer (22).When display (21) shows that automatically " 20 " are when (showing that then " ED-1 " down together if only examine a tensimeter), import second tested manometric numbering ... up to showing ED-1 "; then, heavy aforesaid operations is imported the 3rd tested tensimeter, the 4th tensimeter or the like.Extremely to all tested tensimeters are all imported microcomputer (22), when display (21) showed " ED-1 ", microcomputer (22) just entered outcome record and the automatic output state of VB signal.The function selecting of microcomputer (22) " is placed automated location ", servomotor (2) starting, promote piston rod (7) by speed reduction unit (3) connecting rod (5), make the hydraulic oil in the oil cylinder (6) begin to boost automatically, the increase of the interior hydraulic fluid pressure of oil cylinder (6), pass to tested table and dynamometry piston apparatus (9) by pipeline (14), act on the force-voltage transfer (10) through dynamometry piston (16) again, produce electric signal input microcomputer (22) by force-voltage transfer, servomotor (2) is realized automatic control, after pressure rises to first tested scale, servomotor (2) quits work, and adjusts hydraulic pressure fine setting (27), and first tested manometric pointer that is transfused to is referred in corresponding scale, press the record key, make register (23) the record actual pressure value of this moment.Rap tested tensimeter then, transfer hydraulic pressure fine setting (27), tested manometric pointer is referred to again in this correspondence scale, by the record key actual pressure value is at this moment noted again.After first tested table finishes this spot check, by same second tensimeter of step inspection, the 3rd tensimeter or the like.After treating that this point has all been examined each tested tensimeter, microcomputer (22) is controlled servomotor (2) starting automatically, hydraulic oil in the oil cylinder (6) is boosted, pressure rises to second tested scale value automatically, use the same method tested tensimeter is examined and determine second tested scale value, and the like to the 3rd scale value, the 4th scale value or the like is to the tested manometric upper limit.At this moment display (21) extinguishes the withstand voltage time-delay state that enters.Then display (21) shows measurement upper limit observed pressure value automatically behind the time-delay state, behind the record key, microcomputer (22) makes the servomotor counter-rotating, progressively realize step-down, when pressure drops to tested scale value, use the same method tested tensimeter is carried out the calibrating of step-down process, until the gauge hand correcting action, display this moment (21) demonstrates " ED-2 ", representing that tested tensimeter has been examined finishes, " function selecting " placed the measuring position, printout after this verification result can being averaged by " 0 " key.Print end back microcomputer and reenter armed state.After changing tested tensimeter, again the tensimeter of changing is examined and determine with said method.
The course of work of the calibration system of this pressure criteria device is: make microcomputer (22), micromotor (8) enter normal operating conditions, calibration piston (12) is connected with dynamometry piston apparatus (9) by pipeline (14).Measurement key by microcomputer makes it to show the survey result.At this moment select a supporting weights (26) to be placed on the calibration piston (12), and make it rotate calibration piston generation normal pressure, act on the lower end of dynamometry piston (16) by the pressure oil in the pipeline (14), the upper end of dynamometry piston (16) acts on the force-voltage transfer (10), become electric signal input Control System of Microcomputer through force-voltage transfer, after Control System of Microcomputer is handled, on display (21), show, identical as display result with the weights weight that is placed on the calibration piston (12), illustrate that then dynamometric system meets the demands, otherwise should adjust, make it to be satisfied with requirement.In order to guarantee calibration accuracy, can proofread and correct by the gain amplifier that changes amplifier.
The advantage of this pressure standard meter is: adopted the automatic control of microcomputer to pressurization, the record of examining and determine data, processing, printing, realized manometric automatic Verification, and once can examine and determine by a logarithm Pressure gauge, improved operating efficiency, reduced staff's labour intensity. For manometric calibrating provides efficient means.
Claims (5)
1, a kind of pressure criteria device is characterized in that: by speed reduction unit (3), drive the Hydrauservo System that oil pressure cylinder (6) constitutes by servomotor (2); The dynamometric system that micromotor (8), dynamometry piston apparatus (9) and force-voltage transfer (10) constitute; Calibration system that calibration piston (12) and supporting weights (26) constitute and Control System of Microcomputer four parts are formed.
2, pressure criteria device according to claim 1, it is characterized in that: said Hydrauservo System is to form like this, servomotor (2) drives speed reduction unit (3), output termination one screw mandrel of speed reduction unit (3), it is reciprocating that screw mandrel drives pull bar (5) by the nut on the end fixed support that is contained in pull bar (5), reciprocating piston rod (7) is fixed on the other end fixed mount of pull bar (5) in oil cylinder (6), and oil cylinder (6) is fixed on the main bearing support (4).
3, pressure criteria device according to claim 1, it is characterized in that: said dynamometric system is to form like this, one dynamometry piston (16) is housed in the dynamometry piston apparatus (9), its lower end contacts with pressure oil, the upper end acts on the force-voltage transfer (10), dynamometry piston (16) is fixedly connected by the same friction wheel of connecting rod (17) (18), the same friction wheel of friction wheel (18) (19) is meshed, friction wheel (19) is contained on the micromotor (8), and force-voltage transfer is fixed on the bearing support with the suspended wall form.
4, pressure criteria device according to claim 1 is characterized in that: said calibration system is to form like this, and calibration piston (12) communicates with dynamometry piston apparatus (9) by oil pipe (14).Supporting weights (26) is placed on the calibration piston (12).
5, pressure criteria device according to claim 1, it is characterized in that: said Control System of Microcomputer is to form like this, the electric signal that is produced by power electric transducer (10) passes through amplifier (20), one the road passes to A/D converter, comparer (24) is passed on another road, pass to the circuit input microcomputer (22) of A/D converter, microcomputer (22) is connected to printer (23) and display (21), microcomputer (22) also is furnished with a cover D/A converter, export comparer (24) to by D/A converter again, by comparer control servomotor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87212862 CN87212862U (en) | 1987-12-22 | 1987-12-22 | Pressure standard meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87212862 CN87212862U (en) | 1987-12-22 | 1987-12-22 | Pressure standard meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87212862U true CN87212862U (en) | 1988-08-10 |
Family
ID=4827457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87212862 Pending CN87212862U (en) | 1987-12-22 | 1987-12-22 | Pressure standard meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87212862U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726393B (en) * | 2009-12-31 | 2013-01-02 | 中国航空工业集团公司北京长城计量测试技术研究所 | Piston pressure device |
| CN103499414A (en) * | 2013-10-16 | 2014-01-08 | 北京航空航天大学 | Dynamic calibration device for small-size pressure sensor |
| CN110736585A (en) * | 2019-10-21 | 2020-01-31 | 红旗仪表有限公司 | high-pressure precise pressure control method |
-
1987
- 1987-12-22 CN CN 87212862 patent/CN87212862U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726393B (en) * | 2009-12-31 | 2013-01-02 | 中国航空工业集团公司北京长城计量测试技术研究所 | Piston pressure device |
| CN103499414A (en) * | 2013-10-16 | 2014-01-08 | 北京航空航天大学 | Dynamic calibration device for small-size pressure sensor |
| CN103499414B (en) * | 2013-10-16 | 2015-04-15 | 北京航空航天大学 | Dynamic calibration device for small-size pressure sensor |
| CN110736585A (en) * | 2019-10-21 | 2020-01-31 | 红旗仪表有限公司 | high-pressure precise pressure control method |
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| WD01 | Invention patent application deemed withdrawn after publication |