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Piston type or buoy type pressure meter effective area measuring method

A technology of effective area and measurement method, applied in the direction of measuring fluid pressure, measuring devices, instruments, etc., to achieve the effect of high practical significance and objective measurement results

Inactive Publication Date: 2010-11-03
SHANDONG MEASUREMENT SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019]1) The balance state is determined by human observation, and automatic data collection cannot be performed
[0020]2) At lower pressure (especially for gas piston and floating ball), the piston rises and falls slowly, takes a long time and the equilibrium state is not easy to determine
[0021]3) When the descending speed of one of the pistons is relatively high, the equilibrium state is difficult to determine
[0022]4) When a high-grade ball float pressure gauge is used to measure the effective area of ​​a low-grade ball float pressure gauge, the balance cannot be achieved

Method used

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  • Piston type or buoy type pressure meter effective area measuring method
  • Piston type or buoy type pressure meter effective area measuring method
  • Piston type or buoy type pressure meter effective area measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 (basic application)

[0066] A pressure gauge effective area measuring device, such as figure 1 As shown, it is applied to the determination of the effective area of ​​a piston pressure gauge, including a standard piston 1, a tested piston 2, a pressure source 4, and a differential pressure measurement device 3. The differential pressure measurement device 3 is a differential pressure transmitter 3, where the standard The piston 1 is connected to the positive pressure end of the differential pressure transmitter 3 and connected to the pressure source 4 through the first valve K1; the tested piston 2 is connected to the negative pressure end of the differential pressure transmitter 3 and passed through the second valve K2 Connect to pressure source 4.

[0067] 1) First select the differential pressure transmitter, taking the effective area of ​​a 0.05-level (second-class) piston pressure gauge measuring 0.25MPa as an example.

[0068] Measuring range: Acc...

Embodiment 2

[0091] Embodiment 2 (correction of static pressure error)

[0092] A pressure gauge effective area measuring device, such as figure 1 As shown, it is applied to the determination of the effective area of ​​a piston pressure gauge, including a standard piston 1, a tested piston 2, a pressure source 4, and a differential pressure measurement device 3. The differential pressure measurement device 3 is a differential pressure transmitter 3, where the standard The piston 1 is connected to the positive pressure end of the differential pressure transmitter 3 and connected to the pressure source 4 through the first valve K1; the tested piston 2 is connected to the negative pressure end of the differential pressure transmitter 3 and passed through the second valve K2 Connect to pressure source 4.

[0093] The application method is:

[0094] For any measurement point, add and amplify the special weight m which can generate the predetermined pressure on the two pistons respectively 1...

Embodiment 3

[0105] Embodiment 3 (gas (liquid) column difference correction method 1)

[0106] A pressure gauge effective area measuring device, such as figure 2 As shown, it is applied to the determination of the effective area of ​​a piston pressure gauge, including a standard piston 1, a tested piston 2, a pressure source 4, and a differential pressure measurement device 3. The differential pressure measurement device 3 is a differential pressure transmitter 3, where the standard Piston 1 is connected to the positive pressure end of the differential pressure transmitter, and is connected to the pressure source 4 through the first valve K1; the tested piston 2 is connected to the negative pressure end of the differential pressure transmitter, and is connected to the pressure source through the second valve K2. Source 4 is connected.

[0107] Due to the different piston structures, the lower end surface of piston 1 is higher than the lower end surface of piston 2 by h.

[0108] The app...

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Abstract

The invention relates to a pressure gauge effective area measuring method. The method is suitable for piston type pressure gauge effective area measurement, and also suitable for floating ball type pressure gauge effective area measurement. The method measures a detected pressure gauge through a standard pressure gauge, and comprises a measuring step and a calculating step, wherein the measuring step comprises a step of measuring the differential pressure between the standard pressure gauge and the detected pressure gauge. The pressure gauge effective area measuring method and a device have the advantages of novel structure, convenient use and no need of manpower observation on balance state, can be widely applied to effective area measuring tests of a piston type pressure gauge and a floating ball type pressure gauge, and has high realistic meanings.

Description

technical field [0001] The invention relates to a method for measuring the effective area of ​​a pressure gauge, which is suitable for measuring the effective area of ​​a piston type pressure gauge and also suitable for measuring the effective area of ​​a float type pressure gauge. Background technique [0002] The piston pressure gauge is a standard measuring instrument for measuring pressure, and the effective area of ​​the piston is the most important technical index of the piston pressure gauge. [0003] The determination of the effective area of ​​the piston of the piston pressure gauge is currently carried out in accordance with the method stipulated in the national metrology verification regulations. These procedures are: [0004] JJG 59-2007 "Verification Regulations for Piston Pressure Gauge"; [0005] JJG 236-1994 "First Class Standard Piston Pressure Vacuum Gauge"; [0006] JJG 51-2003 "Verification Regulations for Piston Pressure Vacuum Gauge with Balanced Li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L27/00G01B21/28
Inventor 刘继义王勇
Owner SHANDONG MEASUREMENT SCI RES INST
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