| 摘要 |
Provided is a multi-range field full-automatic pressure and electric signal calibrating instrument, comprising: control components such as a shell, a power switch, multiple-interfaces, a display, a keyboard, and a gas pressure generating unit, a power supply unit, a pressure detecting unit, a gas pressure control unit and an electric signal detecting unit; the pressure output end of the pressure control unit is in parallel connection with pressure joints which are used for installing multiple pressure standard meters and detected meters with different ranges; the pressure control unit is in signal connection with the pressure standard meters; the electric signal detecting unit is in signal connection with the pressure control unit and the detected meters; the power supply unit can supply power by batteries. The calibrating instrument does not need to be externally connected with a gas cylinder and an alternating current power supply and can automatically generate a gas pressure and generate an accurate standard pressure; the design of the multi-range pressure standard meter can be suitable for various detected meters; the double detection and calibration for pressure and electric signals can be implemented; the weight and volume of the instrument are small; and the multi-range field full-automatic pressure and electric signal calibrating instrument is convenient to carry in the field and can carry out automatic calibration on various field pressure instruments. |
| 主权项 |
1. A high pressure bidirectional miniature electric gas pump, comprising a motor, an eccentric shaft, a swing rod, a pump body, a left cylinder body and a right cylinder body, a piston rod, and an one-way valve body and a cylinder head attached to each of the cylinder bodies, wherein
the pump body is a connecting member, the motor is fixed to the pump body, and a motor shaft extends into the pump body and is connected with the eccentric shaft; the eccentric shaft is of a cylindrical shape, and has at one end thereof a driving pin deviated from the motor shaft axis, the driving pin extending through a mounting hole in the flat-shaped swing rod located below the eccentric shaft; the swing rod is connected to the piston rod disposed horizontally therebelow through a screw, with a gap existing between the swing rod and the piston rod; the piston rod is of a cylindrical shape, and opposite ends thereof are mounted with sealing rings and extend into the left and right cylinder bodies, respectively, the sealing rings being hermetically fitted with inner walls of the cylinder bodies; the cylinder body is of a cylindrical structure, and the two cylinder bodies are fixedly mounted at opposite ends of the pump body, respectively, taking the piston rod horizontally disposed therein as an axis; and each of the cylinder bodies is sequentially provided at an outer end thereof with the one-way valve body and the cylinder head, the one-way valve body being installed at an inner side of the cylinder head, communicated with an inner cavity of the cylinder body, and communicated with external air or compressed air lines through passages in the cylinder head. |
