CN201344848Y

CN201344848Y - Piston pressure gauge with new regulations

Info

Publication number: CN201344848Y
Application number: CNU200920031895XU
Authority: CN
Inventors: 吴洪威
Original assignee: SHANXI CHUANGWEI TECHNOLOGY Co Ltd
Current assignee: SHANXI CHUANGWEI TECHNOLOGY Co Ltd
Priority date: 2009-02-13
Filing date: 2009-02-13
Publication date: 2009-11-11
Anticipated expiration: 2019-02-13

Abstract

The utility model discloses a piston type pressure gauge with new regulations, which comprises a bottom board, wherein a measuring system, a displacement indicating gauge, an indicating base, a converter and a power supply interface are arranged on the bottom board, the inner portion of the measuring system is further provided with a piston barrel and a displacement sensor, the inner portion of the bottom board is further provided with a pressure oil cylinder, an unloading valve, a stop valve, an oil ring and a hand pump, wherein the pressure oil cylinder is connected with a pressure hand wheel through a leading screw, the pressure oil cylinder is respectively connected the indicating base, the piston barrel in the measuring system, the unloading valve and the hand pump through hydraulic pipes, the unloading valve is connected with the hand pump through the oil ring and the stop valve in turn, the displacement sensor is connected with the converter, and the converter is respectively connected with the power supply interface and the displacement indicating gauge. The pressure gauge meets the national standards and regulations, and has simple structure, stable and light pressurizing, high value transmission reliability and easy operation.

Description

The new order piston gage

Technical field

The utility model belongs to technical field of measuring equipment, relates to a kind of new order piston gage.

Background technology

Piston gage is the normal pressure gauging instrument of a kind of pin-point accuracy, high repdocutbility and high confidence level, the working mechanism of piston gage is based on the definition of pressure notion, and based on Pascal law and hydrostatic equilibrium principle, be carried in the process that the pressure that is produced on the piston of known useful area provides the accurate pressure value by specific weight with known quality, in the world often with piston gage as national benchmark and working standard or pressure measurement standard, so piston gage has in its field quite widely and to use.Existing piston formula pressure gauge is made up of piston system, specific weight, checker three parts usually, be mainly used in measuring room, laboratory and production or scientific experiment link and use, also have piston gage is directly applied to the voting monitoring of high reliability monitoring link to local other instrument as the pressure reference device.Because existing piston-type pressure is haggled over other amount of pressure instrument, exist the problem that the low life-span of accuracy is short, artificial visual inspection, the loaded down with trivial details effort of pressurization adjustment process are adopted in the displacement indication, its measurement result is credible in true value, also inadequate aspect the stable performance, so piston gage is still waiting to continue to improve.

Summary of the invention

The purpose of this utility model provides a kind of new order piston gage, and as the normal pressure gauging instrument of pin-point accuracy, high repdocutbility and high confidence level, its measurement result has that true value is credible, performance is more apparent stable.

The technical scheme that the utility model adopted is, a kind of new order piston gage, comprise base plate, base plate is provided with measuring system, displacement indicating gauge, gauge stand, converter and power interface, and the inside of measuring system also is provided with piston cylinder and displacement transducer; Also be provided with pressurization oil cylinder, unloader, stop valve, lubricating cup and pitcher pump at base plate interior, the pressurization oil cylinder is connected with the pressurization handwheel by leading screw, the pressurization oil cylinder is connected with piston cylinder, unloader and pitcher pump in gauge stand, the measuring system respectively by hydraulic pipe, and unloader is connected with pitcher pump by lubricating cup, stop valve again successively; Displacement transducer is connected with converter, and converter is connected with the displacement indicating gauge with power interface respectively.

Pressure gauge of the present utility model, its feature also is: base plate is provided with level meter, is provided with levelling bolt for four jiaos at the lower surface of base plate.

The beneficial effects of the utility model are, by the combination of pressures partially and electron displacement measure portion, its measurement result has that true value is credible, performance is more apparent stable, has realized pin-point accuracy, high repdocutbility and the high confidence level of normal pressure metering, simple in structure, operation easily.

Description of drawings

Fig. 1 is the external structure synoptic diagram of the utility model pressure gauge embodiment;

Fig. 2 is another external structure synoptic diagram of the utility model pressure gauge embodiment;

Fig. 3 is the structural representation of the utility model pressure gauge embodiment.

Among the figure, 1. measuring system, 2. counterweight, 3. base plate, 4. unloader, 5. displacement indicating gauge, 6. levelling bolt, 7. gauge stand, 8. stop valve, 9. converter, 10. power interface, 11. level meters, 12. pitcher pump, 13. lubricating cups, 14. pressurization handwheels, 15. pressurization oil cylinders, 16. hang orchid.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As Fig. 1, Fig. 2, the structure of the utility model pressure gauge embodiment comprises base plate 3, is provided with pressurization oil cylinder 15, unloader 4, stop valve 8, pitcher pump 12 and lubricating cup 13 in base plate 3 inside, and pressurization oil cylinder 15 is by leading screw and 14 pressurizations of pressurization handwheel; Base plate 3 be provided with handwheel, the stop valve 8 of measuring system 1, unloader 4 handwheel, displacement indicating gauge 5, power interface 10, level meter 11, pitcher pump 12, pressurization handwheel 14, two be used to install manometric gauge stand 7 to be measured, the inside of measuring system 1 is provided with piston cylinder and is used to measure the displacement transducer that piston moves, and the outside surface of measuring system 1 is hung on blue 16 and installed corresponding counterweight 2 additional according to the measurement situation; Store the lower sebacate fluid of viscosity in the lubricating cup 13; Pitcher pump 12 is used for the one-level pressurization to pressurization oil cylinder 15, pressure can be got to 5MPa, and pressurization handwheel 14 adopts cross handwheel, and comparing with existing circular handwheel more saves labour grasps amount of pressurization easily, be used for the secondary pressurization to pressurization oil cylinder 15, pressure can be got to 60MPa; The lower surface of base plate 3 is provided with levelling bolt 6 for four jiaos, is used for leveling to base plate 3 in conjunction with the demonstration of level meter 11.

As Fig. 3, the syndeton of the utility model pressure gauge embodiment is, pressurization oil cylinder 15 is connected with piston cylinder, unloader 4 and pitcher pump 12 in gauge stand 7 (being provided with two among the embodiment), the measuring system 1 respectively by hydraulic pipe, unloader 4 is connected with pitcher pump 12 by lubricating cup 13, stop valve 8 again successively, constitutes pressures partially; Displacement transducer in the measuring system 1 and converter 9 are connected by lead, converter 9 is connected by lead with power interface 10 and displacement indicating gauge 5 respectively, converter 9 can carry out digital-to-analogue to sensor signal to be handled, indicate the upper and lower displacement amount of measuring system 1 by displacement indicating gauge 5, constitute the electron displacement measure portion.Oil liquid pressure direction of transfer when the direction of arrow among the figure is represented to test.

The manometric characteristics of the utility model are: the first, grade can be divided into 0.005 grade, and 0.01 grade, 0.02 grade, 0.05 grade, compare existing piston manometer, no longer put forward working standard or first-class, second-class saying.The second, compare with existing piston, the manometric rotation of the utility model index perdurability and measuring method have had bigger change, the measurement point in past are dropped to the lower limit of measurement range.Three, measuring system 1 inner piston and the piston cylinder that is provided with of the present utility model all adopts the tungsten carbide material manufacturing, and through the special process grinding, not only Additional temperature error and deformation error are little, and it is long that piston freely rotates perdurability, long service life, its performance is as shown in table 3.Four, the counterweight 2 that uses on the utility model pressure gauge directly is added on the piston urceolus of measuring system 1 by hanging blue 16, avoided the additional vertical force that ball bearing unit and plain bearing arrangement bring in the existing apparatus, the center of gravity of counterweight makes the pressure gauge running steadily at piston bottom end face place simultaneously, and indicating value is accurate.Five, the manometric upper limit of the utility model can be set to 0.6Mpa, 6Mpa, 60Mpa, 100Mpa, 160Mpa, 250MPa respectively, adopts the lower sebacate of kinematic viscosity as table 1 actuating medium, and it is light, highly sensitive to pressurize.Six, initial balancing method and direct balancing method are adopted in pressure meter effective area calibrating of the present utility model.Seven, pressure gauge mass measurement means of the present utility model improve, and the specific weight quality limits of error and specific weight material are had relatively high expectations, and are as shown in table 2.

Table 1 actuating medium performance comparison sheet

Table 2 counterweight material comparison sheet

Table 3 rotates comparison sheet perdurability

The change of this index is bigger, mainly is in order to guarantee piston availability and the efficient working range of service time, and avoiding occurring the piston manometer range can cover, the shortcoming that metering performance but can't meet the demands.Manometric resolving ability of the present utility model is less than producing the pressure counterweight quality that is equivalent to the limits of error 10%.

The manometric course of work of the utility model is, the manometer that the mounting strap verification is measured on gauge stand 7, on measuring system 1, increase corresponding counterweight, while start bit shift measurement part, at first close unloader 4, open stop valve 8, shake pitcher pump 12, pressurization oil cylinder 15 is carried out the one-level pressurization, and pressure can arrive 5MPa, is closing stop valve 8, carry out the secondary pressurization at 14 pairs of pressurizations of rotation pressurization handwheel oil cylinder 15, pressure can arrive 60MPa, indicates the upper and lower displacement amount of measuring system 1 by displacement indicating gauge 5, the rotation counterweight, adjusting pressurization handwheel 14, make displacement indicating gauge 5 indication in zero-bit, pressure system output this moment can be carried out verification to manometer to be verified with the corresponding force value of adding counterweight, makes it up to specification.Verification finishes to open 4 pairs of pressure system off-loads of unloader, as Fig. 1 direction of arrow.

Pressure gauge of the present utility model meets following the countries concerned rules and pertinent literature: the JJG59-2007 of the People's Republic of China (PRC) " piston gage vertification regulation ", JJF1001-1998 " general metering term and definition ", OIMLR 110-1994Pressure Balance (international recommendation of pressure balance), the JJG99-2006 of the People's Republic of China (PRC) " weight detecting rules ".Pressure gauge of the present utility model is simple in structure, and pressurization is stablized light, and numerical value transmits with a high credibility.

Claims

1, a kind of new order piston gage, it is characterized in that: comprise base plate (3), base plate (3) is provided with measuring system (1), displacement indicating gauge (5), gauge stand (7), converter (9) and power interface (10), and the inside of measuring system (1) also is provided with piston cylinder and displacement transducer; Also be provided with pressurization oil cylinder (15), unloader (4), stop valve (8), lubricating cup (13) and pitcher pump (12) in base plate (3) inside, pressurization oil cylinder (15) is connected with pressurization handwheel (14) by leading screw,

Pressurization oil cylinder (15) is connected with piston cylinder, unloader (4) and pitcher pump (12) in gauge stand (7), the measuring system (1) respectively by hydraulic pipe, and unloader (4) is connected with pitcher pump (12) by lubricating cup (13), stop valve (8) again successively;

Displacement transducer is connected with converter (9), and converter (9) is connected with displacement indicating gauge (5) with power interface (10) respectively.

2, pressure gauge according to claim 1 is characterized in that: base plate (3) is provided with level meter, is provided with levelling bolt (6) for four jiaos at the lower surface of base plate (3).