Calibrating device for pressure measuring device

Abstract

The utility model relates to the technical field of metering, and provides a calibrating device for a pressure measuring device, which comprises a weight set, a piston pressure gauge and a pressure multiplier. Wherein the piston pressure gauge comprises a piston rod and a piston cylinder which are in sliding connection with each other, and the weight set acts on the piston rod through gravity. The pressure multiplier is arranged between the piston cylinder and the pressure measuring device, the input end of the pressure multiplier is communicated with the piston cylinder, and the output end of the pressure multiplier is communicated with the pressure measuring device. According to the pressure measuring device calibrating device provided by the utility model, the pressure multiplier is arranged between the piston cylinder and the pressure measuring device, the input end of the pressure multiplier is communicated with the piston cylinder, and the output end of the pressure multiplier is communicated with the pressure measuring device, so that source pressure generated by the piston pressure gauge can be amplified by the pressure multiplier; the calibrating device can calibrate the pressure measuring device with a larger measuring range, the difficulty that the source pressure generated by the weight set and the piston pressure gauge is limited is avoided, the measuring range of the pressure measuring device can be met, and the calibrating accuracy and effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of metrology technology, specifically to a pressure measuring device calibration device. Background Technology

[0002] Common pressure measuring devices include pressure gauges, pressure gauges, and differential pressure gauges. Pressure measuring devices that measure fluid pressure typically compare the pressure to be measured with a reference pressure (such as atmospheric pressure or other given pressure), thus measuring the relative pressure or pressure difference.

[0003] Before installation and use, or after a certain period of use, pressure measuring devices need to be calibrated. Upon successful calibration, a certificate of conformity will be issued to ensure the device's qualification and accuracy. During calibration, personnel will select a corresponding calibration pressure source (such as a weight set or piston gauge) based on the device's range. Simultaneously, following prescribed testing procedures, the pressure generated by the weight set and piston gauge will be compared with the output value of the pressure measuring device to determine its qualification.

[0004] However, during the calibration process, the source pressure generated by the weight set and piston pressure gauge is limited, making it difficult to meet the range of the pressure measuring device, resulting in poor calibration results and low accuracy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a pressure measuring device calibration apparatus to solve at least one of the aforementioned technical defects in the prior art, meet the range requirements of pressure measuring devices, improve calibration accuracy, and reduce calibration errors.

[0006] To achieve the objective of this utility model, this utility model provides a pressure measuring device calibration device, which includes:

[0007] Weight set;

[0008] A piston pressure gauge includes a piston rod and a piston cylinder that are slidably connected to each other, and the weight set acts on the piston rod by gravity;

[0009] A pressure multiplier is disposed between the piston cylinder and the pressure measuring device. The input end of the pressure multiplier is connected to the piston cylinder, and the output end of the pressure multiplier is connected to the pressure measuring device.

[0010] Preferably, it also includes a first catheter and a second catheter;

[0011] The first end of the first conduit is connected to the piston cylinder, the second end of the first conduit is connected to the pressure measuring device, and the first conduit is provided with a first valve;

[0012] The second conduit is connected in parallel with the first conduit, the pressure multiplier is located on the second conduit, and a second valve is provided between the input end of the pressure multiplier and the piston cylinder.

[0013] Preferably, a universal connector is also included;

[0014] The second end of the first conduit is connected to the universal connector pressure measuring device, and the pressure measuring device is located on the universal connector;

[0015] The output end of the pressure multiplier is connected to the universal connector.

[0016] Preferably, it also includes a pressure generating unit, which is connected to the piston cylinder.

[0017] Preferably, it also includes a data acquisition unit and an analysis unit;

[0018] The acquisition unit is adapted to acquire the reading values ​​of the pressure measuring device;

[0019] The analysis unit is electrically connected to the acquisition unit and is adapted to analyze and display the data acquired by the acquisition unit.

[0020] Preferably, it also includes a processing unit;

[0021] The processing unit is electrically connected to the analysis unit and the pressure generating unit, and is adapted to process the error values ​​of the analysis unit and the pressure generating unit.

[0022] The beneficial effects of this utility model are as follows: The pressure measuring device calibration device provided by this utility model, by setting a pressure multiplier between the piston cylinder and the pressure measuring device, with the input end of the pressure multiplier connected to the piston cylinder and the output end of the pressure multiplier connected to the pressure measuring device, can amplify the source pressure generated by the piston pressure gauge, enabling the calibration device to calibrate pressure measuring devices with a larger range, avoiding the difficulty of limited source pressure generated by the weight set and piston pressure gauge, meeting the range of the pressure measuring device, improving the accuracy of calibration and enhancing the calibration effect. Attached Figure Description

[0023] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0024] Figure 1 This is a schematic diagram illustrating the structural principle of the pressure measuring device calibration device provided in this embodiment of the utility model.

[0025] In the picture:

[0026] 100. Weight set;

[0027] 200. Piston pressure gauge; 210. Piston rod; 220. Piston cylinder;

[0028] 300. Pressure multiplier;

[0029] 400. Pressure measuring device; 410. Universal connector;

[0030] 500, conduit; 510, first conduit; 520, second conduit; K1, first valve; K2, second valve;

[0031] 600, Pressure generating unit;

[0032] 700. Data Acquisition Unit; 710. Analysis Unit;

[0033] 800, Processing Unit. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings.

[0035] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The following is combined with Figure 1 The embodiments of this utility model will be described below. It should be understood that the following description is merely an illustrative embodiment of this utility model and does not constitute any limitation on this utility model.

[0038] See Figure 1 This utility model provides a pressure measuring device calibration device, which includes a weight set 100, a piston pressure gauge 200 and a pressure multiplier 300.

[0039] The piston pressure gauge 200 includes a piston rod 210 and a piston cylinder 220 that are slidably connected to each other. The weight group 100 acts on the piston rod 210 by gravity, which can make the piston pressure gauge 200 generate source pressure.

[0040] The pressure multiplier 300 is disposed between the piston cylinder 220 and the pressure measuring device 400. The input end of the pressure multiplier 300 is connected to the piston cylinder 220, and the output end of the pressure multiplier 300 is connected to the pressure measuring device 400. The pressure multiplier 300, the piston cylinder 220, and the pressure measuring device 400 can be connected by a conduit 500.

[0041] It is understood that the pressure measuring device calibration apparatus provided in the embodiments of this application, by setting a pressure multiplier 300 between the piston cylinder 220 and the pressure measuring device 400, with the input end of the pressure multiplier 300 connected to the piston cylinder 220 and the output end of the pressure multiplier 300 connected to the pressure measuring device 400, can amplify the source pressure generated by the piston pressure gauge 200, enabling the calibration apparatus to calibrate the pressure measuring device 400 with a larger range, avoiding the difficulty of the limited source pressure generated by the weight set 100 and the piston pressure gauge 200, meeting the range of the pressure measuring device 400, improving the accuracy of calibration, and enhancing the calibration effect.

[0042] Specifically, catheter 500 also includes a first catheter 510 and a second catheter 520.

[0043] The first end of the first conduit 510 is connected to the piston cylinder 220, the second end of the first conduit 510 is connected to the pressure measuring device 400, and the first conduit 510 is provided with a first valve K1.

[0044] The second conduit 520 is connected in parallel with the first conduit 510. The pressure multiplier 300 is installed on the second conduit 520. A second valve K2 is provided between the input end of the pressure multiplier 300 and the piston cylinder 220.

[0045] By setting up a first conduit 510 with a first valve K1 and a second conduit 520 with a second valve K2, a pressure measuring device 400 with a small range (e.g., a range less than 50 MPa) can be connected to the piston cylinder 220 through the first conduit 510. At this time, the second valve K2 is closed and the first valve K1 is open.

[0046] The source pressure generated by the weight set 100 (e.g., 30 MPa) can be displayed on the pressure measuring device 400. By comparing the pressure value displayed on the pressure measuring device 400 with the source pressure generated by the weight set 100, the error value of the pressure measuring device 400 can be determined, thus completing the verification. For example, if the source pressure generated by the weight set 100 is 30 MPa, and the pressure value displayed on the pressure measuring device 400 is 29 MPa, the difference between the two is 1 MPa. Then, the qualification of the pressure measuring device 400 can be determined according to the corresponding standard table.

[0047] Of course, by setting a first conduit 510 with a first valve K1 and a second conduit 520 with a second valve K2, a pressure measuring device 400 with a larger range (e.g., a range greater than 50 MPa) can be connected to the piston cylinder 220 through the second conduit 520. At this time, the first valve K1 is closed and the second valve K2 is open.

[0048] The source pressure generated by the weight set 100 (e.g., 30 MPa) can be amplified several times by the pressure multiplier 300 (e.g., the source pressure is amplified by 3 times, resulting in a value of 90 MPa). The amplified source pressure of 90 MPa can be displayed on the pressure measuring device 400. By comparing the pressure value displayed on the pressure measuring device 400 with the source pressure generated by the weight set 100, the error value of the pressure measuring device 400 can be determined, thus completing the verification. For example, if the source pressure generated by the weight set 100 is 30 MPa, and the source pressure is amplified by three times to 90 MPa, the pressure value displayed on the pressure measuring device 400 is 89 MPa. The difference between the two is 1 MPa. Then, the qualification of the pressure measuring device 400 can be determined according to the corresponding standard table.

[0049] Thus, the first conduit 510 with the first valve K1 and the second conduit 520 with the second valve K2 enable the calibration device provided in this embodiment of the present invention to calibrate pressure measuring devices 400 with a larger range, and also make the structure of the calibration device simpler and save costs.

[0050] In some embodiments of this utility model, in order to make it more convenient and quick to replace the pressure measuring device 400, the calibration device is also provided with a universal connector 410.

[0051] The second end of the first conduit 510 is connected to the second end of the second conduit 520, the universal connector 410 is connected to the second end of the first conduit 510, and the pressure measuring device 400 is detachably mounted on the universal connector 410.

[0052] After the first pressure measuring device 400 has been calibrated, simply remove the first pressure measuring device 400 from the universal connector 410 to easily and quickly replace the next pressure measuring device 400.

[0053] In some embodiments of this utility model, the testing device is further provided with a pressure generating unit 600.

[0054] The pressure-generating unit 600 is connected to the piston cylinder 220, and the output end of the pressure-generating unit 600 can be connected to the first end of the second conduit 520.

[0055] The pressure generating unit 600 can generate source pressure and display the specific value. When the source pressure value generated by the weight group 100 is equal to the source pressure value generated by the pressure generating unit 600, the piston rod 210 maintains a stable posture, and the pressure generating unit 600 can display the specific source pressure value, that is, the source pressure value generated by the weight group 100 is also displayed (because the piston cylinder 220 and the pressure generating unit 600 are in an isobaric state). This can make the source pressure generated by the calibration device more accurate, thereby improving the calibration accuracy of the calibration device.

[0056] Of course, a third valve (not shown in the attached figure) can be added to the output end of the piston cylinder 220. When the third valve is closed, the pressure generating unit 600 can replace the function of the weight group 100 in generating source pressure, so as to simplify the structure of the calibration device and save costs.

[0057] In some embodiments of this utility model, the verification device further includes a data acquisition unit 700 and an analysis unit 710.

[0058] The acquisition unit 700 can acquire the readings from the pressure measuring device 400;

[0059] The analysis unit 710 is electrically connected to the acquisition unit 700 and can analyze and display the data acquired by the acquisition unit 700.

[0060] Specifically, the acquisition unit 700 can be a camera, which identifies the pressure value displayed by the pressure measuring device 400, and the pressure generating unit 600 can be a pressure generator. The analysis unit 710 can be a computer monitor, which can be connected to the camera via a data cable. The computer monitor can display the pressure value of the pressure measuring device 400. By comparing the pressure values ​​displayed on the computer monitor with those of the pressure generator and the weight set 100, the error of the pressure measuring device 400 can be determined, resulting in higher visualization and more accurate verification results.

[0061] Of course, in some embodiments of this utility model, in order to improve the intelligence of the verification device, the verification device may also be equipped with a processing unit 800.

[0062] The processing unit 800 is electrically connected to the analysis unit 710 and the pressure generating unit 600, and can process the error values ​​of the analysis unit 710 and the pressure generating unit 600.

[0063] Specifically, the pressure measuring device 400 can be a pressure gauge, the pressure generating unit 600 can be a pressure generator, and the processing unit 800 can be a microcontroller. The microcontroller can be connected to the computer monitor and the pressure generator via a data cable. The microcontroller can process the pressure error value between the computer monitor and the pressure generator to complete the calibration operation.

[0064] For example, if a pressure generator produces a pressure value of 30 MPa, the pressure multiplier 300 has a magnification factor of 3, and the computer monitor displays 89 MPa (i.e., the pressure gauge displays 89 MPa), then the error value of the pressure measuring device 400 (i.e., the pressure gauge) corresponding to the computer monitor is 1 MPa (30 MPa * 3 - 89 MPa). In this way, the microcontroller can determine the error value of the pressure measuring device 400, making the calibration results more accurate. Calibration personnel only need to replace the pressure measuring device 400 to be calibrated and adjust the pressure of the pressure generating unit 600, resulting in high calibration efficiency.

[0065] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In the description of this specification, the use of terms such as "preferred embodiment," "another embodiment," "some embodiments," "other embodiments," or "specific example," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for calibrating pressure measuring devices, characterized in that, include: Weight set; A piston pressure gauge includes a piston rod and a piston cylinder that are slidably connected to each other, and the weight set acts on the piston rod by gravity; A pressure multiplier is disposed between the piston cylinder and the pressure measuring device. The input end of the pressure multiplier is connected to the piston cylinder, and the output end of the pressure multiplier is connected to the pressure measuring device.

2. The pressure measuring device calibration device as described in claim 1, characterized in that, It also includes a first catheter and a second catheter; The first end of the first conduit is connected to the piston cylinder, the second end of the first conduit is connected to the pressure measuring device, and the first conduit is provided with a first valve; The second conduit is connected in parallel with the first conduit, the pressure multiplier is located on the second conduit, and a second valve is provided between the input end of the pressure multiplier and the piston cylinder.

3. The pressure measuring device calibration device as described in claim 2, characterized in that, It also includes universal connectors; The second end of the first conduit is connected to the universal connector pressure measuring device, and the pressure measuring device is located on the universal connector; The output end of the pressure multiplier is connected to the universal connector.

4. The pressure measuring device calibration apparatus according to any one of claims 1 to 3, characterized in that, It also includes a pressure generating unit, which is connected to the piston cylinder.

5. The pressure measuring device calibration device as described in claim 4, characterized in that, It also includes a data acquisition unit and an analysis unit; The acquisition unit is adapted to acquire the reading values ​​of the pressure measuring device; The analysis unit is electrically connected to the acquisition unit and is adapted to analyze and display the data acquired by the acquisition unit.

6. The pressure measuring device calibration device as described in claim 5, characterized in that, It also includes a processing unit; The processing unit is electrically connected to the analysis unit and the pressure generating unit, and is adapted to process the error values ​​of the analysis unit and the pressure generating unit.

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