Piston volume tube with power-assisted recoil mechanism
A volume tube and piston technology, which is applied in the field of power-assisted recovery mechanism for piston volume tubes, can solve the problems of unstable flow, deviation of measurement results, affecting the continuity and stability of the working process, etc., to improve the continuity and stability, measurement The effect of performance improvement
Active Publication Date: 2018-01-12
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology
This process usually lasts for tens of seconds before disappearing gradually. During this period, the flow is always in an unstable state, and the measurement is difficult to obtain satisfactory results.
[0008] Generally speaking, in the current use of passive piston volumetric tubes, the effect is better under the condition of large flow and high pressure, while the action of the piston system tends to stagnate when the flow is small and the pressure is low, causing the problem of large pressure fluctuations. This phenomenon It greatly affects the continuity and stability of the working process, resulting in large deviations in the measurement results
Method used
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Embodiment Construction
[0022] The present invention will be described in detail below with reference to the accompanying drawings.
[0023] The assisted return mechanism for the piston volume tube in this embodiment is used in conjunction with the passive piston volume tube, and includes: a return spring 2 , a mounting seat 3 and a tightening nut 5 . One end of the return spring 2 is fixed on the mounting seat 3, and the other end of the mounting seat 3 is fixed on the side of the passive piston volume tube frame 4 away from the cylinder 6 through the tightening nut 5; the return spring 2, the mounting seat 3 and the piston System 1 is in coaxial position.
[0024] The working process of the passive piston volume tube is as follows: figure 2 shown. During the return process of the passive piston volume tube, the hook block 8 on the return mechanism 7 drives the connecting rod head 12 of the piston system 1 to move in the direction close to the return spring 2, and the connecting rod head 12 conta...
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The invention relates to a power-assisting counter-recoil mechanism for a piston volume pipe and belongs to the technical field of liquid flow measurement. The power-assisting counter-recoil mechanism is used for liquid flow correction. The power-assisting counter-recoil mechanism comprises a counter-recoil spring (2), an installation base (3) and a fastening nut (5). One end of the counter-recoil spring (2) is fixed to the installation base (3). The other end of the installation base (3) is fixed to the side, away from a cylinder body (6), of a passive piston volume pipe frame (4) through the fastening nut (5). The counter-recoil spring (2), the installation base (3) and a piston system (1) are located at the coaxial position. According to the power-assisting counter-recoil mechanism for the piston volume pipe, the running continuity and stability of the passive piston volume pipe are effectively improved, and the measurement performance is obviously improved on the conditions of small flow and low pressure.
Description
technical field [0001] The invention relates to a power-assisted recovery mechanism for a piston volume tube, which is used for liquid flow calibration and belongs to the technical field of liquid flow measurement. Background technique [0002] Passive piston volume tube, mainly used for the calibration of liquid flow such as petroleum products, is a volumetric liquid flow calibration device. It consists of a cylinder block (6), a piston system (1), a return mechanism (7), a hook block (8), a guide rail (9) and a passive piston volume tube frame (4). figure 1 shown. During the working process, the piston system reciprocates in the cylinder (6) under the alternating action of the working medium and the return mechanism to realize continuous calibration of the flow. Do a reciprocating motion on the rail. [0003] The piston system (1) consists of a piston (10), a connecting rod (11) and a connecting rod head (12). The piston (10) is inside the cylinder body (6), the connec...
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IPC IPC(8): G01F25/00
Inventor 沈峰刘彦军董磊韩义中赵艳琴张永胜于华伟官志坚
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA