Pressure fixed-point verification device and verification method

Abstract

The invention provides a pressure fixed-point verification device and method, and the device comprises a pressure generation assembly which is used for providing air source pressure; the air inlet ends of the fixed-point and fixed-value pressure regulators are connected to the output pipeline of the pressure generation assembly in parallel, and the fixed-point and fixed-value pressure regulators are used for outputting corresponding preset pressure values of the fixed-point and fixed-value pressure regulators; a plurality of input ends of the multi-channel switching valve are respectively connected to the air outlet end of each fixed-point fixed-value pressure regulator, and the multi-channel switching valve is used for selectively communicating one input end of the multi-channel switching valve to the output end of the corresponding fixed-point fixed-value pressure regulator in response to an operation instruction; and the verification interface is connected to the output end of the multi-channel switching valve and is used for being connected with a pressure instrument to be verified. According to the technical scheme provided by the invention, rapid, high-precision and high-stability fixed-point verification of the pressure instrument is realized, and the verification efficiency and accuracy are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of pressure instrument calibration technology, and in particular to a pressure fixed-point calibration device and calibration method. Background Technology

[0002] With the development of industrial technology, the accuracy and reliability of pressure parameter measurements have become increasingly important. Pressure instrument calibration is a common procedure for pressure measuring instruments, frequently used in critical industries such as petrochemicals, for safety protection, trade settlement, and other important scenarios. The stability and reliability of their metrological characteristics are crucial to safe production and the economic interests of enterprises. Therefore, testing pressure instruments is essential.

[0003] Currently, the standard instruments used for calibrating pressure gauges are generally piston-type pressure gauges or digital pressure gauge calibration devices. Existing technologies have the following drawbacks: First, they are inefficient. Traditional devices require operators to repeatedly and manually adjust the pressure source to the target value when calibrating different pressure points, a time-consuming and labor-intensive process. Second, they are highly dependent on operators; the accuracy and speed of calibration largely depend on the operator's experience and proficiency, easily introducing human error. Finally, there are stability issues; continuous adjustment of the pressure source is difficult to quickly stabilize at a specific calibration point, especially in the micro-pressure range, affecting calibration efficiency and accuracy. Therefore, there is an urgent need for a solution that can achieve rapid, accurate, and one-click fixed-point calibration. Summary of the Invention

[0004] This application provides a pressure point calibration device and calibration method to at least solve the technical problems of low calibration efficiency and low calibration accuracy.

[0005] A first aspect of this application provides a pressure calibration device, the device comprising:

[0006] Pressure generating assembly, used to provide gas source pressure; Multiple fixed-point and fixed-value pressure regulators are provided, with the air inlet of each fixed-point and fixed-value pressure regulator connected in parallel to the output pipeline of the pressure generating component. Each fixed-point and fixed-value pressure regulator is used to output its corresponding preset pressure value. A multi-channel switching valve, wherein multiple input terminals of the multi-channel switching valve are respectively connected to the outlet terminal of each of the fixed-point fixed-value regulators, for selectively connecting one of its input terminals to the output terminal of the corresponding fixed-point fixed-value regulator in response to an operation command; A verification interface is provided, which is connected to the output of the multi-channel switching valve and is used to connect to the pressure gauge to be verified.

[0007] Preferably, the device further includes: a pressure-regulating shut-off valve and a fine-tuning valve; One end of the pressure-regulating shut-off valve is connected to the output end of the multi-channel switching valve, and the other end is connected to the fine-tuning valve; The pressure-stabilizing shut-off valve is used to cut off the upstream circuit after a selected set pressure, providing a preliminary stable pressure source; The other end of the fine-tuning valve is connected to the verification interface. The fine-tuning valve is used to finely adjust the initially stabilized pressure source to obtain the target verification pressure.

[0008] Furthermore, the device also includes: A return pressure reducing valve is connected to the pipeline where the verification interface is located. The return pressure reducing valve is used to release pipeline pressure for return error verification.

[0009] Furthermore, the pressure generating component is an air compressor or an air pump; The multi-channel switching valve is either a solenoid valve assembly or a manual rotary valve.

[0010] Furthermore, the number of the fixed-point, fixed-value voltage regulators is N.

[0011] A second aspect of this application provides a method for pressure point calibration, the method comprising: Step F1: Start the pressure generating component and pre-set multiple fixed-point pressure regulators to different target pressure values; Step F2: Control the multi-channel switching valve to connect the output path of the first fixed-point fixed-value pressure regulator among multiple fixed-point fixed-value pressure regulators, so that the first predetermined pressure is applied to the instrument to be calibrated connected to the calibration interface; Step F3: After the pressure stabilizes, record the first reading of the instrument to be calibrated at the first predetermined pressure; Step F4: Control the multi-channel switching valve to switch to the output path of the second fixed-point fixed-value pressure regulator, so that the second predetermined pressure is applied to the instrument to be calibrated; Step F5: After the pressure stabilizes, record the second reading of the instrument to be calibrated at the second predetermined pressure, and return to step F4 until the Nth reading of the instrument to be calibrated at the Nth predetermined pressure is recorded. Among them, the pressure values ​​from the first predetermined pressure to the Nth predetermined pressure increase sequentially.

[0012] Preferably, the method further includes: After connecting the output path of the target fixed-point pressure regulator, close the pressure stabilizing shut-off valve to isolate upstream pressure fluctuations; The pressure after isolation is adjusted using a fine-tuning valve until the pressure applied to the instrument to be calibrated equals the predetermined pressure value.

[0013] Furthermore, the method also includes: After recording the reading of the instrument to be calibrated at a predetermined pressure, the pressure stabilizing shut-off valve is opened and the pipeline pressure is released. Then, the multi-channel switching valve is controlled to switch to the output path of the next fixed-point fixed-value pressure regulator among the multiple fixed-point fixed-value pressure regulators.

[0014] Furthermore, step 5 includes the following: Control the multi-channel switching valve and the return pressure reducing valve to achieve return verification with pressure decreasing point by point.

[0015] Furthermore, the control of the multi-channel switching valve and the return pressure reducing valve to achieve return verification of pressure decreasing point by point includes: Step E1: Control the multi-channel switching valve to remain in the Nth fixed-point pressure regulator path, and open the return pressure reducing valve to make the pressure applied to the instrument to be calibrated start to decrease steadily from the preset pressure value corresponding to the Nth fixed-point pressure regulator. Step E2: When the pressure drops to the preset pressure value corresponding to the (N-1)th fixed-point pressure regulator, control the multi-channel switching valve to switch to the path with the (N-1)th fixed-point pressure regulator. Step E3: Close the pressure regulating shut-off valve to isolate upstream pressure fluctuations, and then operate the fine-tuning valve to finely adjust the isolated pressure until the pressure applied to the instrument to be calibrated is precisely stabilized at the current lower target pressure value. Step E4: Record the retrace reading of the instrument to be calibrated at the current target pressure value; Step E5: Repeat steps E2 to E4 until the return verification of all preset points from the Nth preset pressure value to the 1st preset pressure value is completed.

[0016] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects: This application proposes a pressure fixed-point calibration device and method. The device includes: a pressure generating component for providing air source pressure; multiple fixed-point and fixed-value pressure regulators, the inlet ends of each regulator being connected in parallel to the output pipeline of the pressure generating component, each regulator outputting its corresponding preset pressure value; a multi-channel switching valve, the multiple input ends of which are respectively connected to the outlet end of each regulator, selectively connecting one input end to the output end of the corresponding regulator in response to an operation command; and a calibration interface connected to the output end of the multi-channel switching valve for connecting to the pressure instrument to be calibrated. The technical solution proposed in this application achieves rapid, high-precision, and high-stability fixed-point calibration of pressure instruments, significantly improving calibration efficiency and accuracy.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a first structural diagram of a pressure point calibration device according to an embodiment of this application; Figure 2 This is a second structural diagram of a pressure point calibration device according to an embodiment of this application; Figure 3 This is a flowchart of a pressure point calibration method according to an embodiment of this application; Figure Labels Pressure generating component 1, fixed-point and fixed-value pressure regulator 2, multi-channel switching valve 3, calibration interface 4, pressure stabilizing shut-off valve 5, fine-tuning valve 6, return pressure reducing valve 7. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] This application proposes a pressure calibration device and method. The device includes: a pressure generating component for providing air source pressure; multiple fixed-point pressure regulators, each with its inlet connected in parallel to the output pipeline of the pressure generating component, and each regulator outputting its corresponding preset pressure value; a multi-channel switching valve, with multiple inputs connected to the outlet of each regulator, selectively connecting one input to the output of the corresponding regulator in response to an operation command; and a calibration interface connected to the output of the multi-channel switching valve for connecting to the pressure instrument to be calibrated. The technical solution proposed in this application achieves rapid, high-precision, and high-stability fixed-point calibration of pressure instruments, significantly improving calibration efficiency and accuracy.

[0021] The following description, with reference to the accompanying drawings, illustrates a pressure point calibration device and calibration method according to embodiments of this application.

[0022] Example 1 Figure 1This is a structural diagram of a pressure calibration device according to an embodiment of this application, as shown below. Figure 1 As shown, the device includes: Pressure generating component 1 is used to provide gas source pressure; Multiple fixed-point and fixed-value pressure regulators 2, with the air inlet of each fixed-point and fixed-value pressure regulator connected in parallel to the output pipeline of the pressure generating component, and each fixed-point and fixed-value pressure regulator is used to output its corresponding preset pressure value. A multi-channel switching valve 3, wherein multiple input terminals of the multi-channel switching valve are respectively connected to the outlet terminal of each of the fixed-point fixed-value regulators, and are used to selectively connect one of its input terminals to the output terminal of the corresponding fixed-point fixed-value regulator in response to an operation command; Verification interface 4 is connected to the output end of the multi-channel switching valve and is used to connect to the pressure gauge to be verified.

[0023] It should be noted that the pressure generating component 1 can be an air compressor or an air pump; The multi-channel switching valve 3 can be a solenoid valve assembly or a manual rotary valve.

[0024] The number of fixed-point and fixed-value voltage regulators 2 is N.

[0025] In the embodiments disclosed herein, such as Figure 2 As shown, the device also includes: a pressure-regulating shut-off valve 5 and a fine-tuning valve 6; One end of the pressure-regulating shut-off valve 5 is connected to the output end of the multi-channel switching valve 3, and the other end is connected to the fine-tuning valve 6; The pressure stabilizing shut-off valve 5 is used to cut off the upstream circuit after a set pressure is selected, providing a preliminary stable pressure source; The other end of the fine-tuning valve 6 is connected to the verification interface 4. The fine-tuning valve 6 is used to finely adjust the initially stabilized pressure source to obtain the target verification pressure.

[0026] Furthermore, such as Figure 2 As shown, the device further includes: The return pressure reducing valve 7 is connected to the pipeline where the verification interface 4 is located. The return pressure reducing valve 7 is used to release pipeline pressure for return error verification.

[0027] In summary, the pressure calibration device proposed in this embodiment enables rapid, high-precision, and highly stable calibration of pressure instruments, significantly improving calibration efficiency and accuracy.

[0028] Based on the aforementioned pressure point calibration device, this embodiment also proposes a pressure point calibration method, such as... Figure 3 As shown, the method includes: Step F1: Start the pressure generating component and pre-set multiple fixed-point pressure regulators to different target pressure values; Step F2: Control the multi-channel switching valve to connect the output path of the first fixed-point fixed-value pressure regulator among multiple fixed-point fixed-value pressure regulators, so that the first predetermined pressure is applied to the instrument to be calibrated connected to the calibration interface; Step F3: After the pressure stabilizes, record the first reading of the instrument to be calibrated at the first predetermined pressure; Step F4: Control the multi-channel switching valve to switch to the output path of the second fixed-point fixed-value pressure regulator, so that the second predetermined pressure is applied to the instrument to be calibrated; Step F5: After the pressure stabilizes, record the second reading of the instrument to be calibrated at the second predetermined pressure, and return to step F4 until the Nth reading of the instrument to be calibrated at the Nth predetermined pressure is recorded. Among them, the pressure values ​​from the first predetermined pressure to the Nth predetermined pressure increase sequentially.

[0029] It should be noted that steps F1 to F5 are for the upward stroke verification.

[0030] Furthermore, the method also includes: After connecting the output path of the target fixed-point pressure regulator, close the pressure stabilizing shut-off valve to isolate upstream pressure fluctuations; The pressure after isolation is adjusted using a fine-tuning valve until the pressure applied to the instrument to be calibrated equals the predetermined pressure value.

[0031] Furthermore, the method also includes: After recording the reading of the instrument to be calibrated at a predetermined pressure, the pressure stabilizing shut-off valve is opened and the pipeline pressure is released. Then, the multi-channel switching valve is controlled to switch to the output path of the next fixed-point fixed-value pressure regulator among the multiple fixed-point fixed-value pressure regulators.

[0032] Furthermore, step 5 is followed by: Control the multi-channel switching valve and the return pressure reducing valve to achieve return verification with pressure decreasing point by point.

[0033] Specifically, the control of the multi-channel switching valve and the return pressure reducing valve to achieve return verification of pressure decreasing point by point includes: Step E1: Control the multi-channel switching valve to remain in the Nth fixed-point pressure regulator path, and open the return pressure reducing valve to make the pressure applied to the instrument to be calibrated start to decrease steadily from the preset pressure value corresponding to the Nth fixed-point pressure regulator. Step E2: When the pressure drops to the preset pressure value corresponding to the (N-1)th fixed-point pressure regulator, control the multi-channel switching valve to switch to the path with the (N-1)th fixed-point pressure regulator. Step E3: Close the pressure regulating shut-off valve to isolate upstream pressure fluctuations, and then operate the fine-tuning valve to finely adjust the isolated pressure until the pressure applied to the instrument to be calibrated is precisely stabilized at the current lower target pressure value. Step E4: Record the retrace reading of the instrument to be calibrated at the current target pressure value; Step E5: Repeat steps E2 to E4 until the return verification of all preset points from the Nth preset pressure value to the 1st preset pressure value is completed.

[0034] In summary, the pressure fixed-point calibration method proposed in this embodiment achieves rapid, high-precision, and high-stability fixed-point calibration of pressure instruments, significantly improving calibration efficiency and accuracy.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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 any suitable manner in 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.

[0036] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0037] 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 pressure point calibration device, characterized in that, The device includes: Pressure generating assembly, used to provide gas source pressure; Multiple fixed-point and fixed-value pressure regulators are provided, with the air inlet of each fixed-point and fixed-value pressure regulator connected in parallel to the output pipeline of the pressure generating component. Each fixed-point and fixed-value pressure regulator is used to output its corresponding preset pressure value. A multi-channel switching valve, wherein multiple input terminals of the multi-channel switching valve are respectively connected to the outlet terminal of each of the fixed-point fixed-value regulators, for selectively connecting one of its input terminals to the output terminal of the corresponding fixed-point fixed-value regulator in response to an operation command; A verification interface is provided, which is connected to the output of the multi-channel switching valve and is used to connect to the pressure gauge to be verified.

2. The apparatus as claimed in claim 1, characterized in that, The device also includes: a pressure-regulating shut-off valve and a fine-tuning valve; One end of the pressure-regulating shut-off valve is connected to the output end of the multi-channel switching valve, and the other end is connected to the fine-tuning valve; The pressure-stabilizing shut-off valve is used to cut off the upstream circuit after a selected set pressure, providing a preliminary stable pressure source; The other end of the fine-tuning valve is connected to the verification interface. The fine-tuning valve is used to finely adjust the initially stabilized pressure source to obtain the target verification pressure.

3. The apparatus as described in claim 2, characterized in that, The device further includes: A return pressure reducing valve is connected to the pipeline where the verification interface is located. The return pressure reducing valve is used to release pipeline pressure for return error verification.

4. The apparatus as described in claim 3, characterized in that, The pressure generating component is an air compressor or an air pump; The multi-channel switching valve is either a solenoid valve assembly or a manual rotary valve.

5. The apparatus as described in claim 4, characterized in that, The number of fixed-point, fixed-value voltage regulators is N.

6. A pressure calibration method based on the pressure calibration device according to any one of claims 1-5, characterized in that, The method includes: Step F1: Start the pressure generating component and pre-set multiple fixed-point pressure regulators to different target pressure values; Step F2: Control the multi-channel switching valve to connect the output path of the first fixed-point fixed-value pressure regulator among multiple fixed-point fixed-value pressure regulators, so that the first predetermined pressure is applied to the instrument to be calibrated connected to the calibration interface; Step F3: After the pressure stabilizes, record the first reading of the instrument to be calibrated at the first predetermined pressure; Step F4: Control the multi-channel switching valve to switch to the output path of the second fixed-point fixed-value pressure regulator, so that the second predetermined pressure is applied to the instrument to be calibrated; Step F5: After the pressure stabilizes, record the second reading of the instrument to be calibrated at the second predetermined pressure, and return to step F4 until the Nth reading of the instrument to be calibrated at the Nth predetermined pressure is recorded. Among them, the pressure values ​​from the first predetermined pressure to the Nth predetermined pressure increase sequentially.

7. The method as described in claim 6, characterized in that, The method further includes: After connecting the output path of the target fixed-point pressure regulator, close the pressure stabilizing shut-off valve to isolate upstream pressure fluctuations; The pressure after isolation is adjusted using a fine-tuning valve until the pressure applied to the instrument to be calibrated equals the predetermined pressure value.

8. The method as described in claim 7, characterized in that, The method further includes: After recording the reading of the instrument to be calibrated at a predetermined pressure, the pressure stabilizing shut-off valve is opened and the pipeline pressure is released. Then, the multi-channel switching valve is controlled to switch to the output path of the next fixed-point fixed-value pressure regulator among the multiple fixed-point fixed-value pressure regulators.

9. The method as described in claim 8, characterized in that, Step 5 is followed by: Control the multi-channel switching valve and the return pressure reducing valve to achieve return verification with pressure decreasing point by point.

10. The method as described in claim 9, characterized in that, The control of the multi-channel switching valve and the return pressure reducing valve to achieve return verification of pressure decreasing point by point includes: Step E1: Control the multi-channel switching valve to remain in the Nth fixed-point pressure regulator path, and open the return pressure reducing valve to make the pressure applied to the instrument to be calibrated start to decrease steadily from the preset pressure value corresponding to the Nth fixed-point pressure regulator. Step E2: When the pressure drops to the preset pressure value corresponding to the (N-1)th fixed-point pressure regulator, control the multi-channel switching valve to switch to the path with the (N-1)th fixed-point pressure regulator. Step E3: Close the pressure regulating shut-off valve to isolate upstream pressure fluctuations, and then operate the fine-tuning valve to finely adjust the isolated pressure until the pressure applied to the instrument to be calibrated is precisely stabilized at the current lower target pressure value. Step E4: Record the retrace reading of the instrument to be calibrated at the current target pressure value; Step E5: Repeat steps E2 to E4 until the return verification of all preset points from the Nth preset pressure value to the 1st preset pressure value is completed.

Images