Improved pressure calibrator

Abstract

The invention discloses an improved pressure calibrator, which comprises a base and a connecting pipe. Two sets of supporting rods are symmetrically welded to the lower end of the base; two sets of fixing clamps are fixedly mounted on the upper end face of the base; and a handshake pump is arranged on the position, penetrating into the two sets of fixing clamps, above the base. According to the improved pressure calibrator, a reverse piston is arranged; under the condition that only a forward piston exists originally, during pressurizing, due to the inner cavity volume limit of the handshake pump, the high pressure is difficult to generate, and the pressure required for calibrating cannot be reached; but after the reverse piston is additionally mounted, a horn opening of the reverse pistoncan be opened in a fallback state to prevent air from entering the hydraulic oil side of the handshake pump, due to the fact that no air exists in a pump body, the pressurization performance of a pressure gauge calibrating pump is greatly improved, and the pressure can be increased to 60 MPa through one time of pressurization; and the negative pressure can be generated, the calibrating requirements of a negative pressure meter are met, the improved pressure calibrator is suitable for different working conditions, and better using prospects are brought.

Description

technical field [0001] The invention relates to the field of precision measuring instruments, in particular to an improved pressure calibrator. Background technique [0002] A pressure calibrator is a device that can be used for calibrating pressure measuring instruments, and can also be used for calibrating non-pressure measuring instruments that have a certain functional relationship with the pressure value. This pressure gauge calibrator integrates pressure generation and pressure Controlled in one body, equipped with a standard device of appropriate precision, it can carry out debugging, verification, inspection, calibration and testing of the measured object with corresponding precision, and its application field is very wide; when the existing pressure calibrator is used, we It was found that the one-time pressurization capacity of the pressure calibrator was not enough due to the air entering the cylinder, and it was difficult to generate an appropriate negative press...

AI Technical Summary

Problems solved by technology

[0002] A pressure calibrator is a device that can be used for calibrating pressure measuring instruments, and can also be used for calibrating non-pressure measuring instruments that have a certain functional relationship with the pressure value. This pressure gauge calibrator integrates pressure generation and pressure Controlled in one body, equipped with a standard device of appropriate precision, it can carry out debugging, verification, inspection, calibration and testing of the measured object with corresponding precision, and its application field is very wide; when the existing pressure calibrator is used, we It was found that the one-time pressurization capacity of the pressure calibrator was not enough due to the air entering the cylinder, and it was difficult to generate an appropriate negative pressure, which could not reach the pressure required for calibration, and the negative pressure gauge could not be calibrated. certain adverse effects, therefore, we propose an improved pressure calibrator

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