CN201819768U

CN201819768U - Full-automatic vacuum calibrator

Info

Publication number: CN201819768U
Application number: CN2010201494275U
Authority: CN
Inventors: 吴洪威
Original assignee: SHANXI CHUANGWEI TECHNOLOGY Co Ltd
Current assignee: SHANXI CHUANGWEI TECHNOLOGY Co Ltd
Priority date: 2010-04-02
Filing date: 2010-04-02
Publication date: 2011-05-04
Anticipated expiration: 2020-04-02

Abstract

The utility model discloses a full-automatic vacuum calibrator. According to the connection structure of an air circuit, a pressure boosting valve, a pressure reducing valve, a stop valve, a solenoid valve bank A and a throttle valve bank are arranged in parallel between an air storage tank and an air compressor, the air storage tank is communicated with a sensor and is further communicated with instrument connecting seats sequentially through a solenoid valve bank B; and according to the connection structure of an electric circuit, a power switch, a transformer, an air switch and a circuit board are sequentially connected, a singlechip is embedded in the circuit board and is respectively connected with the solenoid valve bank A, the solenoid valve bank B, a keyboard, a light-emitting diode (LED) screen and an instrument amplifier, and the instrument amplifier is connected with the sensor. The full-automatic vacuum calibrator can be used for generating pressure truly in a full-automatic way with positive and negative strokes, multiple calibration pressure values can be set at one step, and pressure boosting and pressure reducing can be automatically carried out; a calibration process can be controlled automatically; and meanwhile, a manual stop valve is provided, so that a pressure regulation process can be accelerated, the operation is simple and the calibration efficiency is improved.

Description

The fully automatic vacuum tester

Technical field

The utility model belongs to the thermometrically technical field, relates to a kind of fully automatic vacuum tester.

Background technology

The vacuum tester is a kind of pressure-generating device, be mainly used in vacuum pressure Meter Test or verification, in sealing system, produce different pressure, can carry out instrument checks such as tensimeter, transmitter after must cooperating the degree of precision standard by control volume of air size; Make and directly rotate the pressurization handwheel when pressing, can realize stepless voltage regulation, save the process of unloading counterweight of removing, lighter, be mainly used in the verification of enterprise work field apparatuss such as laboratory and industrial and mineral oil, because existing vacuum tester can't use separately, be subjected to the restriction of standard scale precision, it is not directly perceived to be difficult for reading, poor stability, demonstration simultaneously, and manual operation efficient is low to wait deficiency, so the vacuum tester awaits to improve.

Summary of the invention

The purpose of this utility model provides a kind of fully automatic vacuum tester, having solved existing vacuum tester can't use separately, be subjected to the restriction of standard scale precision in the use, it is not directly perceived to be difficult for reading, poor stability, demonstration simultaneously, the inefficient problem of manual operation.

The technical scheme that the utility model adopted is, a kind of fully automatic vacuum tester, comprise casing, the upper and lower panel and the base plate of being respectively arranged with of casing, at panel upper surface power switch, meter adapting-seat, back-up valve, dropping valve, stop valve are installed, transformer, air switch, circuit board, LED screen are installed at the panel lower surface; Gas-holder, air compressor are installed on base plate, sensor, throttling valve group also are installed in casing;

Comprise above-mentioned parts, syndeton according to gas circuit is, be arranged in parallel back-up valve, dropping valve, stop valve, electromagnetic valve group A, throttling valve group between gas-holder and the air compressor, gas-holder and sensor UNICOM, gas-holder also passes through electromagnetic valve group B and meter adapting-seat UNICOM successively;

Comprise above-mentioned parts, syndeton according to circuit is, power switch, transformer, air switch are connected successively with circuit board, in circuit board, be inlaid with single-chip microcomputer, single-chip microcomputer is connected respectively with instrument amplifier with electromagnetic valve group A, electromagnetic valve group B, keyboard, LED screen, and instrument amplifier is connected with sensor.

Fully automatic vacuum tester of the present utility model, its feature also is:

Preset program module in the described single-chip microcomputer, comprise master routine, driver module, keyboard load module, sampling computing module, pid control module composition.

The beneficial effect of the utility model device is, can really full-automatic positive revesal make pressure, and keyboard can once be set a plurality of verification force value, and system boosts automatically, step-down; After reaching force value, pressurization stops automatically, hypotony or when too high, robot control system(RCS) compensates automatically; But the stepping setting is controlled automatically to checking procedure; Be equipped with hand stop valve simultaneously, can accelerate the pressure adjustment process, simple to operate, improved calibrating efficient.

Description of drawings

Fig. 1 is the external structure synoptic diagram of the utility model vacuum tester embodiment;

Fig. 2 is the inner structure synoptic diagram of the utility model vacuum tester embodiment;

Fig. 3 is the gas circuit synoptic diagram of the utility model vacuum tester embodiment;

Fig. 4 is the circuit structure diagram of the utility model vacuum tester embodiment;

Fig. 5 fully automatic vacuum tester program module figure.

Among the figure, 1. gas-holder, 2. power switch, 3. air compressor, 4. meter adapting-seat, 5. back-up valve, 6. dropping valve, 7. transformer, 8. air switch, 9. circuit board, 10. stop valve, 11. sensors, 12. the throttling valve group, 13.LED screen, 14. panels, 15. pad pasting, 16. casings, 17. stay pipes, 18. base plate, 21. electromagnetic valve group A, 22. electromagnetic valve group B, 23. single-chip microcomputer, 24. keyboards, 25. instrument amplifiers, 26. driver module, 27. keyboard load modules, 28. sampling computing modules, 29.PID control module, 30. master routines.

Embodiment

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

With reference to Fig. 1, Fig. 2, fully automatic vacuum tester of the present utility model comprises a casing 16, the panel 14 that is provided with suitable for reading of casing 16, Fig. 1 is a mounted component on panel 14, includes power switch 2, meter adapting-seat 4, back-up valve 5, dropping valve 6, stop valve 10; As shown in Figure 2, be mounted component in the casing under panel 14 16.Support by stay pipe 17 between panel 14 and the base plate 18, wherein at panel 14 lower surfaces transformer 7, air switch 8, circuit board 9, LED screen 13 are installed, LED screen 13 is provided with the pad pasting 15 of protectiveness; Gas-holder 1, air compressor 3 are installed on base plate 18, sensor 11, throttling valve group 12 also are installed in casing 16.

As Fig. 3, the gas circuit structure of the utility model device is, back-up valve 5, dropping valve 6, stop valve 10, electromagnetic valve group A21, throttling valve group 12 have been arranged in parallel between gas-holder 1 and the air compressor 3, gas-holder 1 and sensor 11 UNICOMs, gas-holder 1 also by with electromagnetic valve group B22 and two meter adapting-seats 4 UNICOM successively.

As Fig. 4, the circuit structure of fully automatic vacuum tester embodiment of the present utility model is, power switch 2, transformer 7, air switch 8 are connected successively with circuit board 9, in circuit board 9, be inlaid with single-chip microcomputer 23, single-chip microcomputer 23 and electromagnetic valve group A21, electromagnetic valve group B22, keyboard 24, LED screen 13 are connected respectively with instrument amplifier 25, and instrument amplifier 25 is connected with sensor 11.

Sensor 11 is selected the negative pressure transducer of high linearity for use, in real time acquisition instrument work at present pressure.And voltage signal sent into instrument amplifier 25, instrument amplifier 25 receives the voltage signal of being sent here by sensor 11, after amplifying, send into the AD conversion unit of 430 type single-chip microcomputers 23, single-chip microcomputer 23 is imported by keyboard 24 reception users and is respectively examined and determine a little, driving LED screen 13 shows the work at present state, the voltage that the receiving front-end Acquisition Circuit is passed back also is converted into force value, the pressure reduction of calculating pressure value and set point, the break-make of utilizing pid algorithm output pulsating wave to control two groups of solenoid valves (electromagnetic valve group A21, electromagnetic valve group B22) arrives the calibrating point with control system pressure.

As Fig. 5, the program module part of fully automatic vacuum tester embodiment of the present utility model comprises master routine 30, driver module 26, keyboard load module 27, sampling computing module 28, pid control module 29 compositions, all is contained in advance in the circuit board 9.Wherein, master routine 30 is coordinated each module work, and the control program flow process is finished verification process.Driver module 26 drives the LCD screen 13 of 12864 types, shows information such as work at present state, design of pressure point, for the user provides operation interface.Keyboard load module 27 real time scan keyboards are deciphered the keyboard instruction of user's input, and produce keyboard interrupt notice master routine 30.Sampling computing module 28 starts the AD conversion unit of single-chip microcomputers 23, calculates the pressure reduction of force value and force value and set point according to transformation result, selects suitable filtering algorithm to make system more stable.Pid control module 29 calculates pulse width according to pressure reduction, and selects suitable controlled solenoid valve, and control system pressure arrives set point.

The utility model is to measure automatically and instrument check for pressure, a kind of easy and simple to handle, working method efficiently is provided, but the goal pressure that Automatic Control output sets, and accomplish voltage stabilizing, constant voltage, the pressure of being exported has very high precision and control stiffness, can be used as the pressure source that standard is provided when tensimeter, sensor, pressure unit, pressure switch and digital pressure gauge equal pressure instrument carried out verification, have that volume is little, in light weight, low noise, portable characteristic, be suitable for execute-in-place.Be specially adapted to measure the department of high requests such as institutes, measuring room, high-accuracy calibration.

Claims

1. fully automatic vacuum tester, it is characterized in that: comprise casing (16), the upper and lower panel (14) and the base plate (18) of being respectively arranged with of casing (16), at panel (14) upper surface power switch (2), meter adapting-seat (4), back-up valve (5), dropping valve (6), stop valve (10) are installed, at panel (14) lower surface transformer (7), air switch (8), circuit board (9), LED are installed and shield (13); Gas-holder (1), air compressor (3) are installed on base plate (18), sensor (11) and throttling valve group (12) also are installed in casing (16);

Comprise above-mentioned parts, syndeton according to gas circuit is, be arranged in parallel back-up valve (5), dropping valve (6), stop valve (10), electromagnetic valve group A(21 between gas-holder (1) and the air compressor (3)), throttling valve group (12), gas-holder (1) and sensor (11) UNICOM, gas-holder (1) is also by electromagnetic valve group B(22) with meter adapting-seat (4) UNICOM successively;

Comprise above-mentioned parts, syndeton according to circuit is, power switch (2), transformer (7), air switch (8) are connected successively with circuit board (9), in circuit board (9), be inlaid with single-chip microcomputer (23), single-chip microcomputer (23) and electromagnetic valve group A(21), electromagnetic valve group B(2), keyboard (24), LED screen (13) is connected respectively with instrument amplifier (25), instrument amplifier (25) is connected with sensor (11).