Multi-medium pressure calibration device and method

Abstract

The present invention discloses a multi-media pressure calibration device and method, which belongs to the field of metrology and calibration technology. The medium pressure calibration device includes: a standard digital pressure module is connected to the first collection port of the pressure standard platform, and a pressure instrument is connected to the second collection port of the pressure standard platform; the standard digital pressure module and the pressure instrument are both connected to the collector; the pressure conversion unit includes: a housing and a pressure converter; the pressure converter is fixedly arranged in the housing, and the housing is divided into a first cavity and a second cavity; the first cavity is connected to the pressure standard platform, and the second cavity is connected to the pressurizer. The multi-media pressure calibration device and method of the present invention can adapt to two pressure media, realize that the working medium of the pressure instrument is different from the pressurized medium and has the pressure required for pressure calibration, and realize the pressure calibration of the pressure instrument under the actual working medium.

Description

Technical Field

[0001] The present invention relates to the technical field of metrology and calibration, and in particular to a multi-medium pressure calibration device and method. Background Art

[0002] In the pipeline systems of many ships and test systems, it is common to monitor the pressure parameters in the pipeline to ensure system safety and as an input parameter for adjusting the system's variable operating conditions. In order to ensure that the pressure parameter values ​​are unified and standardized, it is necessary to conduct traceable metrological calibration of pressure instruments regularly in accordance with the inspection procedures or calibration specifications.

[0003] At present, pressure instruments are mostly disassembled and transported to the laboratory for calibration, which results in a long transportation cycle and the risk of instruments being bumped during transportation to multiple locations. In addition, the medium for laboratory pressure calibration is an inherent single medium, such as inert gas nitrogen, oil, etc., which is inconsistent with the actual working medium of pressure instruments and cannot truly reflect the impact of the medium on the calibration results. Moreover, different medium calibration systems do not have the function of multi-media calibration. The laboratory needs to be equipped with multiple sets of pressure calibration devices with different media. Summary of the invention

[0004] The present invention provides a multi-media pressure calibration device and method, which solves or partially solves the technical problem in the prior art that the laboratory calibration working medium of the pressure calibration device is inconsistent with the actual working medium of the pressure instrument and the medium is single.

[0005] In order to solve the above technical problems, the present invention provides a multi-media pressure calibration device for calibrating pressure instruments, the medium pressure calibration device comprising: a pressure calibration platform, a pressure conversion unit, a standard digital pressure module, a collector and a pressurizer; the standard digital pressure module is connected to the first collection port of the pressure standard platform, and the pressure instrument is connected to the second collection port of the pressure standard platform; the standard digital pressure module and the pressure instrument are both connected to the collector; the pressure conversion unit comprises: a shell and a pressure converter; the pressure converter is fixedly arranged in the shell and divides the shell into a first cavity and a second cavity; the first cavity is connected to the pressure standard platform, and the second cavity is connected to the pressurizer.

[0006] Furthermore, an overflow port is provided on the top of the pressure calibration platform.

[0007] Furthermore, a drain port is provided at the bottom of the pressure calibration platform.

[0008] Furthermore, the standard digital pressure module is connected to the first acquisition port of the pressure standard platform through a first conversion head; and the pressure instrument is connected to the second acquisition port of the pressure standard platform through a second conversion head.

[0009] Furthermore, the standard digital pressure module and the pressure meter are both connected to the collector via cables.

[0010] Further, the first cavity is connected to the pressure standard platform through an interconnecting pipe;

[0011] The second cavity is communicated with the pressurizer through a pressure supply connecting pipe.

[0012] Further, a first connector is fixedly provided on the first cavity; a second connector is fixedly provided on the pressure calibration platform; a first end of the interconnecting connecting tube is connected to the first connector, and a second end of the interconnecting connecting tube is connected to the second connector.

[0013] Furthermore, a third connector is fixedly provided on the second cavity; a fourth connector is fixedly provided on the pressurizer; the first end of the pressure supply connecting pipe is connected to the third connector, and the second end of the pressure supply connecting pipe is connected to the fourth connector.

[0014] Based on the same inventive concept, the present application also provides a multi-media pressure calibration method, comprising the following steps: filling the pressure calibration platform with the working medium of the pressure instrument, and the working medium of the pressure instrument flows into the first cavity; starting the pressurizer, the pressurizer supplies the pressurizer working medium to the second cavity, and the pressure of the pressurizer working medium is transmitted to the pressure instrument working medium through a pressure converter; the standard digital pressure module obtains the standard pressure value, and sends the standard pressure value to the collector; the pressure instrument obtains the detection pressure value, and sends the detection pressure value to the collector; the standard pressure value is compared with the detection pressure value to obtain a comparison result, and the pressure instrument is calibrated according to the comparison result.

[0015] Furthermore, when the working medium of the pressure instrument fills the pressure calibration platform, the pressurizer is started to the maximum calibration pressure to check whether there is leakage.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0017] Since the standard digital pressure module is connected to the first acquisition port of the pressure standard platform, the pressure instrument is connected to the second acquisition port of the pressure standard platform, the standard digital pressure module and the pressure instrument are connected to the collector, the pressure converter is fixedly arranged in the shell, and the shell is divided into a first cavity and a second cavity, the first cavity is connected to the pressure standard platform, and the second cavity is connected to the pressurizer, so the pressure calibration platform is filled with the working medium of the pressure instrument, and the working medium of the pressure instrument flows into the first cavity, the pressurizer is started, and the pressurizer supplies the working medium of the pressurizer to the second cavity, and the pressure of the working medium of the pressurizer is transmitted to the pressure through the pressure converter. The instrument working medium, the standard digital pressure module obtains the standard pressure value, and sends the standard pressure value to the collector, the pressure instrument obtains the detection pressure value, and sends the detection pressure value to the collector, the standard pressure value is compared with the detection pressure value, and a comparison result is obtained. The pressure instrument is calibrated according to the comparison result. It can adapt to two pressure media, realize the provision of pressure required for pressure calibration when the working medium of the pressure instrument is different from the pressurized medium, realize the pressure calibration of the pressure instrument under the actual working medium, shorten the calibration time, improve the advantages of environmental parameters, realize on-site calibration of pressure instruments, and improve the accuracy of pressure parameter value transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a multi-medium pressure calibration device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Working diagram of the multi-medium pressure calibration device;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the pressure conversion unit of the multi-media pressure calibration device. DETAILED DESCRIPTION

[0021] See also Figure 1-3 A multi-medium pressure calibration device provided in an embodiment of the present invention is used to calibrate a pressure instrument 1. The medium pressure calibration device includes: a pressure calibration platform 2, a pressure conversion unit 3, a standard digital pressure module 4, a collector 5 and a pressurizer 6.

[0022] The standard digital pressure module 4 is communicated with a first acquisition port of the pressure standard platform 2 , and the pressure instrument 1 is communicated with a second acquisition port of the pressure standard platform 2 .

[0023] The standard digital pressure module 4 and the pressure instrument 1 are both connected to the collector 5 .

[0024] The pressure conversion unit 3 includes a housing 3 - 1 and a pressure converter 3 - 2 .

[0025] The pressure converter 3-2 is fixedly disposed in the housing 3-1 and divides the housing 3-1 into a first cavity 3-3 and a second cavity 3-4.

[0026] The first cavity 3 - 3 is connected to the pressure standard platform 2 , and the second cavity 3 - 4 is connected to the pressurizer 6 .

[0027] In the specific implementation manner of the present application, since the standard digital pressure module 4 is connected to the first collection port of the pressure standard platform 2, the pressure instrument 1 is connected to the second collection port of the pressure standard platform 2, the standard digital pressure module 4 and the pressure instrument 1 are both connected to the collector 5, the pressure converter 3-2 is fixedly arranged in the shell 3-1, and the shell 3-1 is divided into a first cavity 3-3 and a second cavity 3-4, the first cavity 3-3 is connected to the pressure standard platform 2, and the second cavity 3-4 is connected to the pressurizer 6, so the pressure calibration platform 2 is filled with the pressure instrument working medium 7, and the pressure instrument working medium 7 flows into the first cavity 3-3, the pressurizer 6 is started, and the pressurizer 6 supplies the pressurizer working medium 8 to the second cavity 3-4, and the pressurizer 6 is pressed. The pressure of the pressure transmitter working medium 8 is transmitted to the pressure instrument working medium 7 through the pressure converter 3-2, the standard digital pressure module 4 obtains the standard pressure value and sends the standard pressure value to the collector 5, the pressure instrument 1 obtains the detection pressure value and sends the detection pressure value to the collector 5, the standard pressure value is compared with the detection pressure value to obtain a comparison result, and the pressure instrument is calibrated according to the comparison result. It can adapt to two pressure media, realize the provision of pressure that the working medium of the pressure instrument is different from the pressurized medium and has the pressure required for pressure calibration, realize the pressure calibration of the pressure instrument under the actual working medium, shorten the calibration time, improve the advantages of environmental parameters, realize on-site calibration of the pressure instrument, and improve the accuracy of pressure parameter value transmission.

[0028] The collector 6 collects the pressure or electrical signal of the standard digital pressure module 4 and the pressure meter 1 for display, or transmits the signal to the calibration system software for automatic data recording.

[0029] Among them, the pressure converter 3-2 can be a diaphragm compressor, the pressurizer 6 is a pressure provider, which can be a hydraulic pressurizer, an air pressurizing pump or a pressure tank, and the pressure instrument 1 is a pressure transmitter or a pressure gauge.

[0030] Specifically, an overflow port 2 - 1 is opened on the top of the pressure calibration platform 2 .

[0031] The working medium 7 of the pressure instrument is added into the pressure calibration platform 2 through the overflow port 2-1, and the gas is discharged. After the pressure calibration platform 2 is filled, the overflow port 2-1 is closed.

[0032] A drain port 2 - 2 is provided at the bottom of the pressure calibration platform 2 .

[0033] After the calibration work is completed, the working medium 7 of the pressure instrument in the pressure calibration platform 2 is drained through the drain port 2-2, and the pressure calibration platform 2 is cleaned and dried so that the pressure calibration platform 2 meets the cleanliness requirements for re-calibration.

[0034] Specifically, the standard digital pressure module 4 is connected to the first collection port of the pressure standard platform 2 through the first conversion head 9, which facilitates the connection between the standard digital pressure module 4 and the pressure standard platform 2. In this embodiment, the first conversion head 9 is connected to the pressure standard platform 2 through the first locking nut 10, which is convenient for disassembly and assembly.

[0035] The pressure meter 1 is connected to the second collection port of the pressure standard platform 2 through the second conversion head 11, which facilitates the connection between the pressure meter 1 and the pressure standard platform 2. In this embodiment, the second conversion head 11 is connected to the pressure standard platform 2 through the second locking nut 12, which is convenient for disassembly and assembly.

[0036] The first conversion head 9 and the second conversion head 11 can be female thread and male hole, or female hole and male thread.

[0037] Specifically, the standard digital pressure module 4 and the pressure meter 1 are connected to the collector 5 via a cable 13 to facilitate data transmission.

[0038] Specifically, the first cavity 3-3 is connected to the pressure standard platform 2 through the interconnecting connecting tube 14. In this embodiment, a first connector 15 is fixedly provided on the first cavity 3-3; a second connector 16 is fixedly provided on the pressure calibration platform 2; a first end of the interconnecting connecting tube 14 is connected to the first connector 15, and a second end of the interconnecting connecting tube 14 is connected to the second connector 16.

[0039] The working medium 7 of the pressure instrument in the pressure standard platform 2 enters the interconnecting pipe 14 through the first connector 15 , and then enters the first cavity 3 - 3 through the second connector 16 .

[0040] The second cavity 3-4 is connected to the pressurizer 6 through the pressure supply connecting pipe 17. In this embodiment, a third connector 18 is fixedly provided on the second cavity 3-4; a fourth connector 19 is fixedly provided on the pressurizer 5; a first end of the pressure supply connecting pipe 17 is connected to the third connector 18, and a second end of the pressure supply connecting pipe 17 is connected to the fourth connector 19.

[0041] The pressurizer working medium 8 in the pressurizer 6 enters the pressure supply connecting pipe 17 through the fourth connecting head 19, and then enters the first cavity 3-3 through the third connecting head 18.

[0042] The pressure supply connecting pipe 17 is a pressure-resistant metal pipe or a non-metallic hose.

[0043] Based on the same inventive concept, the present application also provides a multi-medium pressure calibration method comprising the following steps:

[0044] The pressure calibration platform 2 is filled with the pressure instrument working medium 7, and the pressure instrument working medium 7 flows into the first cavity 3-3.

[0045] The pressurizer 6 is started, and the pressurizer 6 supplies the pressurizer working medium 8 to the second cavity 3 - 4 , and the pressure of the pressurizer working medium 8 is transmitted to the pressure instrument working medium 7 through the pressure converter 3 - 2 .

[0046] The standard digital pressure module 4 obtains the standard pressure value and sends the standard pressure value to the collector 5 .

[0047] The pressure meter 1 obtains the detected pressure value and sends the detected pressure value to the collector 5 .

[0048] The standard pressure value is compared with the detection pressure value to obtain a comparison result, and the pressure instrument 1 is calibrated according to the comparison result.

[0049] When the standard pressure value obtained by the standard digital pressure module 4 is the same as the detection pressure value obtained by the pressure instrument 1 , the pressure instrument 1 is accurate.

[0050] When the standard pressure value obtained by the standard digital pressure module 4 is different from the detection pressure value obtained by the pressure meter 1, the pressure meter 1 is adjusted until the standard pressure value is the same as the detection pressure value. If the standard pressure value is still different from the detection pressure value after the pressure meter 1 is adjusted, the value is recorded and notified to the user.

[0051] Specifically, when the pressure instrument working medium 7 fills the pressure calibration platform 1, the pressurizer 6 is started to the maximum calibration pressure to check whether there is leakage. If there is leakage, sealing measures are taken until there is no leakage.

[0052] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A multi-medium pressure calibration method, characterized in that: A multi-media pressure calibration device is provided for calibrating a pressure instrument. The multi-media pressure calibration device comprises: a pressure calibration platform, a pressure conversion unit, a standard digital pressure module, a collector and a pressurizer; the standard digital pressure module is connected to a first collection port of the pressure calibration platform, and the pressure instrument is connected to a second collection port of the pressure calibration platform; the standard digital pressure module and the pressure instrument are both connected to the collector; the pressure conversion unit comprises: a housing and a pressure converter; the pressure converter is fixedly arranged in the housing and divides the housing into a first cavity and a second cavity; the first cavity is connected to the pressure calibration platform, and the second cavity is connected to the pressurizer. The multi-media pressure calibration method comprises the following steps: Filling the pressure calibration platform with the working medium of the pressure instrument, and allowing the working medium of the pressure instrument to flow into the first cavity; The pressurizer is started, and the pressurizer supplies the pressurizer working medium to the second cavity, and the pressure of the pressurizer working medium is transmitted to the pressure instrument working medium through the pressure converter; The standard digital pressure module obtains the standard pressure value and sends the standard pressure value to the collector; The pressure meter obtains the detection pressure value and sends the detection pressure value to the collector; The standard pressure value is compared with the test pressure value to obtain a comparison result, and the pressure instrument is calibrated according to the comparison result.

2. The multi-medium pressure calibration method according to claim 1, characterized in that: When the working medium of the pressure instrument fills the pressure calibration platform, start the pressurizer to the maximum calibration pressure and check for leaks.

3. The multi-medium pressure calibration method according to claim 1, characterized in that: An overflow port is provided on the top of the pressure calibration platform.

4. The multi-medium pressure calibration method according to claim 1, characterized in that: A drain port is provided at the bottom of the pressure calibration platform.

5. The multi-medium pressure calibration method according to claim 1, characterized in that: The standard digital pressure module is connected to the first acquisition port of the pressure calibration platform through a first conversion head; The pressure instrument is connected to the second collection port of the pressure calibration platform through a second conversion head.

6. The multi-media pressure calibration method according to claim 1, characterized in that: The standard digital pressure module and the pressure instrument are both connected to the collector via cables.

7. The multi-media pressure calibration method according to claim 1, characterized in that: The first cavity is connected to the pressure calibration platform via an interconnecting pipe; The second cavity is communicated with the pressurizer through a pressure supply connecting pipe.

8. The multi-medium pressure calibration method according to claim 7, characterized in that: A first connector is fixedly arranged on the first cavity; A second connector is fixedly arranged on the pressure calibration platform; The first end of the interconnecting connecting pipe is communicated with the first connecting head, and the second end of the interconnecting connecting pipe is communicated with the second connecting head.

9. The multi-medium pressure calibration method according to claim 7, characterized in that: A third connector is fixedly arranged on the second cavity; A fourth connector is fixedly provided on the pressurizer; The first end of the pressure supply connecting pipe is communicated with the third connecting head, and the second end of the pressure supply connecting pipe is communicated with the fourth connecting head.

Images