Differential pressure transmitter static pressure influence verification device and verification method

Abstract

The invention provides a differential pressure transmitter static pressure influence verification device and method, and the device comprises a pressure generation assembly which is used for providing gas with a first preset pressure, and the first gas outlet end of the pressure generation assembly is connected with the high-pressure end of a differential pressure transmitter, and the first gas outlet end of the pressure generation assembly is connected with the high-pressure end of the differential pressure transmitter; a second air outlet end of the pressure generating assembly is connected with a low-pressure end of the differential pressure transmitter; the first pressure regulating assembly is used for regulating the air pressure of the high-pressure end of the differential pressure transmitter to second preset pressure; and the second pressure regulating assembly is used for regulating the air pressure of the low-pressure end of the differential pressure transmitter to third preset pressure. According to the differential pressure transmitter static pressure influence verification device and verification method disclosed by the invention, the differential pressure value under the static pressure can be provided for the high-pressure end and the low-pressure end of the differential pressure transmitter, so that the static pressure influence verification of the differential pressure transmitter is realized according to the differential pressure value under the static pressure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of differential pressure transmitter pressure testing, and particularly to a static pressure influence calibration device and a calibration method for a differential pressure transmitter. Background Art

[0002] Differential pressure refers to the pressure difference between two different measurement points, and this parameter has important applications in many aspects such as measuring flow velocity, flow rate, liquid level, etc. With the development of industrial technology, the accuracy and reliability of differential pressure parameter measurement have also been increasingly concerned. A differential pressure transmitter is a common differential pressure measuring instrument, commonly found in important industries such as petrochemical industry, and is used in important scenarios such as safety protection and trade settlement. The stability and reliability of its metrological characteristics are related to safe production and the economic interests of enterprises.

[0003] It is very necessary to test the influence of static pressure on the differential pressure transmitter. Currently, the standard instruments used for calibrating differential pressure transmitters are generally piston pressure gauges or digital pressure gauge calibration devices. Such devices can only provide a stable static pressure value and cannot provide the differential pressure value under static pressure. Therefore, they can only detect the indication error of the differential pressure transmitter to the air and the influence test of the lower limit of the range of the differential pressure transmitter under static pressure, which has a large difference from the actual working conditions. Summary of the Invention

[0004] The present disclosure aims to at least solve one of the technical problems in the related art to some extent.

[0005] For this purpose, the object of the present disclosure is to provide a static pressure influence calibration device and a calibration method for a differential pressure transmitter.

[0006] To achieve the above object, the first aspect of the present disclosure provides a static pressure influence calibration device for a differential pressure transmitter, including: a pressure generating assembly, the pressure generating assembly is used to provide a gas with a first preset pressure, and the first air outlet end of the pressure generating assembly is connected to the high-pressure end of the differential pressure transmitter, and the second air outlet end of the pressure generating assembly is connected to the low-pressure end of the differential pressure transmitter; a first pressure regulating assembly, the first pressure regulating assembly is arranged between the first air outlet end of the pressure generating assembly and the high-pressure end of the differential pressure transmitter, and the first pressure regulating assembly is used to adjust the air pressure at the high-pressure end of the differential pressure transmitter to a second preset pressure; a second pressure regulating assembly, the second pressure regulating assembly is arranged between the second air outlet end of the pressure generating assembly and the low-pressure end of the differential pressure transmitter, and the second pressure regulating assembly is used to adjust the air pressure at the low-pressure end of the differential pressure transmitter to a third preset pressure.

[0007] Optionally, the calibration device further includes: a balance component, a first end of the balance component is connected to the high-pressure end of the differential pressure transmitter, and a second end of the balance component is connected to the low-pressure end of the differential pressure transmitter; wherein, when the pressure generating component provides gas at an initial pressure, the first end and the second end of the balance component are conducted, and until the gas pressure provided by the pressure generating component reaches the first preset pressure, the first end and the second end of the balance component are cut off.

[0008] Optionally, the balance component includes: a balance valve, a first end of the balance valve is connected to the high-pressure end of the differential pressure transmitter, and a second end of the balance valve is connected to the low-pressure end of the differential pressure transmitter; wherein, when the pressure generating component provides gas at an initial pressure, the first end and the second end of the balance valve are conducted, and until the gas pressure provided by the pressure generating component reaches the first preset pressure, the first end and the second end of the balance valve are cut off.

[0009] Optionally, the first pressure regulating component includes: a first pressure regulator, the first pressure regulator is arranged between the first gas outlet end of the pressure generating component and the high-pressure end of the differential pressure transmitter, and the first pressure regulator is used to regulate the gas pressure at the high-pressure end of the differential pressure transmitter to the second preset pressure; wherein, the pressure regulating range of the first pressure regulator is -50 kPa - 50 kPa, and the pressure regulating accuracy of the first pressure regulator is 0.01 kPa.

[0010] Optionally, the first pressure regulating component includes: a second pressure regulator, the second pressure regulator is arranged between the second gas outlet end of the pressure generating component and the low-pressure end of the differential pressure transmitter, and the second pressure regulator is used to regulate the gas pressure at the low-pressure end of the differential pressure transmitter to the third preset pressure; wherein, the pressure regulating range of the second pressure regulator is -50 kPa - 50 kPa, and the pressure regulating accuracy of the second pressure regulator is 0.01 kPa.

[0011] Optionally, the calibration device further includes: a first pressure detection unit, a detection end of the first pressure detection unit is arranged at the high-pressure end of the differential pressure transmitter, and the first pressure detection unit is used to detect the gas pressure at the high-pressure end of the differential pressure transmitter; a second pressure detection unit, a detection end of the second pressure detection unit is arranged at the low-pressure end of the differential pressure transmitter, and the second pressure detection unit is used to detect the gas pressure at the low-pressure end of the differential pressure transmitter.

[0012] Optionally, the first pressure detection unit includes: a first digital pressure gauge, a detection end of the first digital pressure gauge is arranged at the high-pressure end of the differential pressure transmitter, and the first digital pressure gauge is used to detect the gas pressure at the high-pressure end of the differential pressure transmitter.

[0013] Optionally, the second pressure detection unit includes: a second digital pressure gauge, the detection end of the second digital pressure gauge is arranged at the low-pressure end of the differential pressure transmitter, and the second digital pressure gauge is used to detect the air pressure at the low-pressure end of the differential pressure transmitter.

[0014] Optionally, the pressure generating assembly includes: a gas source, a pressure reducer and a pressure regulating valve. The gas outlet end of the gas source is connected to the gas inlet end of the pressure reducer, and the gas inlet end of the pressure regulating valve is connected to the gas outlet end of the pressure reducer. The gas outlet end of the pressure regulating valve is respectively connected to the high-pressure end and the low-pressure end of the differential pressure transmitter. The pressure regulating valve is used to provide gas at the first preset pressure; wherein, the first pressure regulating component is arranged between the gas outlet end of the pressure regulating valve and the high-pressure end of the differential pressure transmitter, and the second pressure regulating component is arranged between the gas outlet end of the pressure regulating valve and the low-pressure end of the differential pressure transmitter.

[0015] The second aspect of the present disclosure provides a method for calibrating the static pressure influence of a differential pressure transmitter, including: controlling the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter to conduct; providing gas at an initial pressure to the high-pressure end and the low-pressure end of the differential pressure transmitter until the gas pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter reach the first preset pressure; controlling the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter to cut off; adjusting the air pressure at the high-pressure end of the differential pressure transmitter to the second preset pressure, and adjusting the air pressure at the low-pressure end of the differential pressure transmitter to the third preset pressure; calibrating the differential pressure transmitter according to the difference between the second preset pressure and the third preset pressure.

[0016] The technical solution provided by the present disclosure may include the following beneficial effects:

[0017] When the first pressure regulating component adjusts the air pressure at the high-pressure end of the differential pressure transmitter to the second preset pressure, and the second pressure regulating component adjusts the air pressure at the low-pressure end of the differential pressure transmitter to the third preset pressure, it can provide the differential pressure value under static pressure for the high-pressure end and the low-pressure end of the differential pressure transmitter, so as to realize the calibration of the static pressure influence of the differential pressure transmitter according to the differential pressure value under static pressure, and ensure the high-performance operation of the differential pressure transmitter.

[0018] The additional aspects and advantages of the present disclosure will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present disclosure. Description of the Drawings

[0019] The above-mentioned and / or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0020] Figure 1 is a schematic structural diagram of a device for calibrating the static pressure influence of a differential pressure transmitter proposed in an embodiment of the present disclosure;

[0021] Figure 2 It is a schematic flow chart of a static pressure influence calibration device for a differential pressure transmitter proposed in an embodiment of the present disclosure;

[0022] As shown in the figure: 1. Pressure generating assembly, 11. Pressure reducer, 12. Pressure regulating valve;

[0023] 2. First pressure regulating assembly, 3. Second pressure regulating assembly, 4. Balancing assembly, 5. First pressure detection unit, 6. Second pressure detection unit;

[0024] 100. Differential pressure transmitter. Specific embodiments

[0025] The embodiments of the present disclosure will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present disclosure and should not be construed as a limitation of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0026] As Figure 1 shown, an embodiment of the present disclosure proposes a static pressure influence calibration device for a differential pressure transmitter 100, including: a pressure generating assembly 1, a first pressure regulating assembly 2 and a second pressure regulating assembly 3. The pressure generating assembly 1 is used to provide a gas with a first preset pressure, and the first gas outlet end of the pressure generating assembly 1 is connected to the high-pressure end of the differential pressure transmitter 100, and the second gas outlet end of the pressure generating assembly 1 is connected to the low-pressure end of the differential pressure transmitter 100. The first pressure regulating assembly 2 is arranged between the first gas outlet end of the pressure generating assembly 1 and the high-pressure end of the differential pressure transmitter 100, and the first pressure regulating assembly 2 is used to adjust the air pressure at the high-pressure end of the differential pressure transmitter 100 to a second preset pressure. The second pressure regulating assembly 3 is arranged between the second gas outlet end of the pressure generating assembly 1 and the low-pressure end of the differential pressure transmitter 100, and the second pressure regulating assembly 3 is used to adjust the air pressure at the low-pressure end of the differential pressure transmitter 100 to a third preset pressure.

[0027] It can be understood that since the first air outlet end of the pressure generating assembly 1 is connected to the high-pressure end of the differential pressure transmitter 100, and the second air outlet end of the pressure generating assembly 1 is connected to the low-pressure end of the differential pressure transmitter 100, the pressure generating assembly 1 can provide the gas with the first preset pressure for the high-pressure end and the low-pressure end of the differential pressure transmitter 100. Moreover, since the first pressure regulating assembly 2 is arranged between the first air outlet end of the pressure generating assembly 1 and the high-pressure end of the differential pressure transmitter 100, and the second pressure regulating assembly 3 is arranged between the second air outlet end of the pressure generating assembly 1 and the low-pressure end of the differential pressure transmitter 100, the first pressure regulating assembly 2 can regulate the air pressure at the high-pressure end of the differential pressure transmitter 100, and the second pressure regulating assembly 3 can regulate the air pressure at the low-pressure end of the differential pressure transmitter 100. Thus, when the first pressure regulating assembly 2 regulates the air pressure at the high-pressure end of the differential pressure transmitter 100 to the second preset pressure, and the second pressure regulating assembly 3 regulates the air pressure at the low-pressure end of the differential pressure transmitter 100 to the third preset pressure, it can provide the differential pressure value under the static pressure for the high-pressure end and the low-pressure end of the differential pressure transmitter 100, so as to realize the static pressure influence calibration of the differential pressure transmitter 100 according to the differential pressure value under the static pressure and ensure the high-performance operation of the differential pressure transmitter 100.

[0028] In addition, compared with calibration devices such as piston pressure gauges and digital pressure gauges, the calibration device of this embodiment has a simple structure, is more stable and reliable, and has strong applicability.

[0029] It should be noted that the pressure generating assembly 1 is used to provide the gas with the first preset pressure, and the specific type of the pressure generating assembly 1 can be set according to actual needs without limitation. Among them, the first preset pressure can be 6 MPa.

[0030] The first pressure regulating assembly 2 is used to regulate the air pressure at the high-pressure end of the differential pressure transmitter 100 from the first preset pressure to the second preset pressure, and the specific type of the first pressure regulating assembly 2 can be set according to actual needs without limitation.

[0031] The second pressure regulating assembly 3 is used to regulate the air pressure at the low-pressure end of the differential pressure transmitter 100 from the first preset pressure to the third preset pressure, and the specific type of the second pressure regulating assembly 3 can be set according to actual needs without limitation.

[0032] Among them, the second preset pressure and the third preset pressure are set according to the needs during calibration to meet the differential pressure between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 under the static pressure.

[0033] Such as Figure 1As shown, in some embodiments, the calibration device further includes: a balance component 4, the first end of the balance component 4 is connected to the high-pressure end of the differential pressure transmitter 100, and the second end of the balance component 4 is connected to the low-pressure end of the differential pressure transmitter 100. Wherein, when the pressure generating component 1 provides gas at an initial pressure, the first end and the second end of the balance component 4 are conducted, until the gas pressure provided by the pressure generating component 1 reaches a first preset pressure, the first end and the second end of the balance component 4 are cut off.

[0034] It can be understood that, since the first end of the balance component 4 is connected to the high-pressure end of the differential pressure transmitter 100, and the second end of the balance component 4 is connected to the low-pressure end of the differential pressure transmitter 100, when the first end and the second end of the balance component 4 are conducted, the conduction of the path between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can be realized, and, when the first end and the second end of the balance component 4 are cut off, the cut-off of the path between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can be realized.

[0035] Based on this, when the pressure generating component 1 provides gas at an initial pressure, the first end and the second end of the balance component 4 are conducted, so as to realize the connected state between the high-pressure end and the low-pressure end of the differential pressure transmitter 100, and further avoid the problem of over-range differential pressure caused by the mismatch of the pressure increase rates between the high-pressure end and the low-pressure end of the differential pressure transmitter 100. And, until the gas pressure provided by the pressure generating component 1 reaches a first preset pressure, the first end and the second end of the balance component 4 are cut off, so as to realize the independent state of the high-pressure end and the low-pressure end of the differential pressure transmitter 100, ensure that the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can adjust the air pressure respectively, and further realize the differential pressure under static pressure.

[0036] It should be noted that the balance component 4 is used for pressure balance before the differential pressure between the high-pressure end and the low-pressure end of the differential pressure transmitter 100, to avoid the problem of over-range differential pressure. The specific type of the balance component 4 can be set according to actual needs and is not limited thereto.

[0037] Wherein, the initial pressure is the pressure in the initial stage, which can be the ambient pressure. Under the pressurized gas supply of the pressure generating component 1, the air pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter 100 rise from the initial pressure to the first preset pressure.

[0038] In some embodiments, the balance component 4 includes: a balance valve, the first end of the balance valve is connected to the high-pressure end of the differential pressure transmitter 100, and the second end of the balance valve is connected to the low-pressure end of the differential pressure transmitter 100. Wherein, when the pressure generating component 1 provides gas at an initial pressure, the first end and the second end of the balance valve are conducted, until the gas pressure provided by the pressure generating component 1 reaches a first preset pressure, the first end and the second end of the balance valve are cut off.

[0039] It can be understood that since the first end of the balancing valve is connected to the high-pressure end of the differential pressure transmitter 100, and the second end of the balancing valve is connected to the low-pressure end of the differential pressure transmitter 100, when the first end and the second end of the balancing valve are connected, the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can be connected, and when the first end and the second end of the balancing valve are cut off, the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can be cut off.

[0040] Based on this, when the pressure generating component 1 provides gas with initial pressure, the first end and the second end of the balancing valve are connected, thereby realizing the connection state of the high-pressure end and the low-pressure end of the differential pressure transmitter 100, thereby avoiding the problem of differential pressure over-range caused by the mismatch of the pressure increase rate between the high-pressure end and the low-pressure end of the differential pressure transmitter 100, and until the gas pressure provided by the pressure generating component 1 reaches the first preset pressure, the first end and the second end of the balancing valve are cut off, thereby realizing the independent state of the high-pressure end and the low-pressure end of the differential pressure transmitter 100, ensuring that the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can adjust the air pressure respectively, thereby realizing the differential pressure under static pressure.

[0041] It should be noted that the balancing valve has a first end and a second end that can be opened or closed, and is used to balance the pressure difference between the high-pressure end and the low-pressure end of the differential pressure transmitter 100. The balancing valve can withstand a pressure of more than 6 MPa.

[0042] In some embodiments, the first pressure regulating assembly 2 includes a first pressure regulator, which is disposed between the first outlet port of the pressure generating assembly 1 and the high-pressure port of the differential pressure transmitter 100 and is configured to regulate the pressure at the high-pressure port of the differential pressure transmitter 100 to a second preset pressure. The first pressure regulator has a pressure regulation range of -50 kPa to 50 kPa, and a pressure regulation accuracy of 0.01 kPa.

[0043] It can be understood that since the first pressure regulator is arranged between the first air outlet end of the pressure generating component 1 and the high-pressure end of the differential pressure transmitter 100, the first pressure regulator can adjust the air pressure at the high-pressure end of the differential pressure transmitter 100 to the second preset pressure, thereby cooperating with the second pressure regulating component 3 to provide the high-pressure end and the low-pressure end of the differential pressure transmitter 100 with a differential pressure value under static pressure, and then realize the static pressure influence calibration of the differential pressure transmitter 100 according to the differential pressure value under static pressure.

[0044] It should be noted that the first pressure regulator is used to adjust the air pressure at the high-pressure end of the differential pressure transmitter 100 to the second preset pressure, and the first pressure regulator has a large pressure regulation range and pressure regulation accuracy, which can meet different differential pressure requirements.

[0045] In some embodiments, the first pressure regulating assembly 2 includes: a second pressure regulator, which is disposed between the second air outlet end of the pressure generating assembly 1 and the low-pressure end of the differential pressure transmitter 100, and the second pressure regulator is configured to regulate the air pressure at the low-pressure end of the differential pressure transmitter 100 to a third preset pressure. Wherein, the pressure regulating range of the second pressure regulator is -50 kPa - 50 kPa, and the pressure regulating accuracy of the second pressure regulator is 0.01 kPa.

[0046] It can be understood that since the second pressure regulator is disposed between the second air outlet end of the pressure generating assembly 1 and the low-pressure end of the differential pressure transmitter 100, the second pressure regulator can regulate the air pressure at the low-pressure end of the differential pressure transmitter 100 to the third preset pressure, so as to cooperate with the first pressure regulating assembly 2 to provide a differential pressure value under static pressure for the high-pressure end and the low-pressure end of the differential pressure transmitter 100, and further realize the static pressure influence calibration of the differential pressure transmitter 100 according to the differential pressure value under static pressure.

[0047] It should be noted that the second pressure regulator is configured to regulate the air pressure at the low-pressure end of the differential pressure transmitter 100 to the third preset pressure, and the second pressure regulator has a large pressure regulating range and pressure regulating accuracy, which can meet different differential pressure requirements.

[0048] Based on the first pressure regulator and the second pressure regulator, the upper limit of the differential pressure regulation of the differential pressure transmitter 100 can reach ±100 kPa.

[0049] As Figure 1 shown, in some embodiments, the calibration device further includes: a first pressure detection unit 5 and a second pressure detection unit 6. The detection end of the first pressure detection unit 5 is disposed at the high-pressure end of the differential pressure transmitter 100, and the first pressure detection unit 5 is configured to detect the air pressure at the high-pressure end of the differential pressure transmitter 100. The detection end of the second pressure detection unit 6 is disposed at the low-pressure end of the differential pressure transmitter 100, and the second pressure detection unit 6 is configured to detect the air pressure at the low-pressure end of the differential pressure transmitter 100.

[0050] It can be understood that since the detection end of the first pressure detection unit 5 is disposed at the high-pressure end of the differential pressure transmitter 100, the first pressure detection unit 5 can detect the air pressure at the high-pressure end of the differential pressure transmitter 100, so as to ensure the accurate regulation of the air pressure at the high-pressure end of the differential pressure transmitter 100 by the first pressure regulating assembly 2, and further ensure the stable static pressure influence calibration of the differential pressure transmitter 100.

[0051] Since the detection end of the second pressure detection unit 6 is disposed at the low-pressure end of the differential pressure transmitter 100, the second pressure detection unit 6 can detect the air pressure at the low-pressure end of the differential pressure transmitter 100, so as to ensure the accurate regulation of the air pressure at the low-pressure end of the differential pressure transmitter 100 by the second pressure regulating assembly 3, and further ensure the stable static pressure influence calibration of the differential pressure transmitter 100.

[0052] It should be noted that the first pressure detection unit 5 is used to detect the air pressure at the high-pressure end of the differential pressure transmitter 100, and the second pressure detection unit 6 is used to detect the air pressure at the low-pressure end of the differential pressure transmitter 100. The specific types of the first pressure detection unit 5 and the second pressure detection unit 6 can be set according to actual needs, and there is no limitation in this regard.

[0053] In some embodiments, the first pressure detection unit 5 includes: a first digital pressure gauge, the detection end of the first digital pressure gauge is arranged at the high-pressure end of the differential pressure transmitter 100, and the first digital pressure gauge is used to detect the air pressure at the high-pressure end of the differential pressure transmitter 100.

[0054] It can be understood that since the detection end of the first digital pressure gauge is arranged at the high-pressure end of the differential pressure transmitter 100, the first digital pressure gauge can detect the air pressure at the high-pressure end of the differential pressure transmitter 100, so as to ensure the precise adjustment of the air pressure at the high-pressure end of the differential pressure transmitter 100 by the first pressure regulating component 2, and further ensure the stable static pressure influence calibration of the differential pressure transmitter 100.

[0055] In some embodiments, the second pressure detection unit 6 includes: a second digital pressure gauge, the detection end of the second digital pressure gauge is arranged at the low-pressure end of the differential pressure transmitter 100, and the second digital pressure gauge is used to detect the air pressure at the low-pressure end of the differential pressure transmitter 100.

[0056] It can be understood that since the detection end of the second digital pressure gauge is arranged at the low-pressure end of the differential pressure transmitter 100, the second digital pressure gauge can detect the air pressure at the low-pressure end of the differential pressure transmitter 100, so as to ensure the precise adjustment of the air pressure at the low-pressure end of the differential pressure transmitter 100 by the second pressure regulating component 3, and further ensure the stable static pressure influence calibration of the differential pressure transmitter 100.

[0057] As Figure 1 shown, in some embodiments, the pressure generating component 1 includes: a gas source (not shown in the figure), a pressure reducer 11 and a pressure regulating valve 12. The gas outlet end of the gas source is connected to the gas inlet end of the pressure reducer 11, and the gas inlet end of the pressure regulating valve 12 is connected to the gas outlet end of the pressure reducer 11. The gas outlet end of the pressure regulating valve 12 is respectively connected to the high-pressure end and the low-pressure end of the differential pressure transmitter 100, and the pressure regulating valve 12 is used to provide gas with a first preset pressure. Among them, the first pressure regulating component 2 is arranged between the gas outlet end of the pressure regulating valve 12 and the high-pressure end of the differential pressure transmitter 100, and the second pressure regulating component 3 is arranged between the gas outlet end of the pressure regulating valve 12 and the low-pressure end of the differential pressure transmitter 100.

[0058] It can be understood that since the air outlet end of the air source is connected to the inlet end of the pressure reducer 11, and the inlet end of the pressure regulating valve 12 is connected to the outlet end of the pressure reducer 11, and the outlet end of the pressure regulating valve 12 is respectively connected to the high-pressure end and the low-pressure end of the differential pressure transmitter 100, the air outlet of the air source can reach the first preset pressure under the combined regulation of the pressure reducer 11 and the pressure regulating valve 12, thereby ensuring that the differential pressure transmitter 100 can perform a stable static pressure influence calibration.

[0059] It should be noted that the air source is used to provide pressurized air, and the specific type of the air source can be set according to actual needs, and no limitation is imposed thereon.

[0060] The pressure reducer 11 is used for reducing the pressure of the air outlet of the air source and is for the rough adjustment of the air pressure in the pressure generating assembly 1. The specific type of the pressure reducer 11 can be set according to actual needs, and no limitation is imposed thereon.

[0061] The pressure regulating valve 12 is used for regulating the pressure of the air outlet of the pressure reducer 11 and is for the fine adjustment of the air pressure in the pressure generating assembly 1. The specific type of the pressure regulating valve 12 can be set according to actual needs, and no limitation is imposed thereon.

[0062] As Figure 2 shown, the embodiments of the present disclosure also propose a method for calibrating the static pressure influence of a differential pressure transmitter 100, including:

[0063] S1: Control the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 to be conductive;

[0064] S2: Supply gas with an initial pressure to the high-pressure end and the low-pressure end of the differential pressure transmitter 100 until the gas pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter 100 reach the first preset pressure;

[0065] S3: Control the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 to be cut off;

[0066] S4: Adjust the air pressure at the high-pressure end of the differential pressure transmitter 100 to the second preset pressure, and adjust the air pressure at the low-pressure end of the differential pressure transmitter 100 to the third preset pressure;

[0067] S5: Calibrate the differential pressure transmitter 100 according to the difference between the second preset pressure and the third preset pressure.

[0068] It can be understood that when the air pressure at the high-pressure end of the differential pressure transmitter 100 is adjusted to the second preset pressure and the air pressure at the low-pressure end of the differential pressure transmitter 100 is adjusted to the third preset pressure, a differential pressure value under static pressure can be provided for the high-pressure end and the low-pressure end of the differential pressure transmitter 100, thereby realizing the calibration of the static pressure influence of the differential pressure transmitter 100 according to the differential pressure value under static pressure and ensuring the high-performance operation of the differential pressure transmitter 100.

[0069] Moreover, when supplying gas with an initial pressure to the high-pressure end and the low-pressure end of the differential pressure transmitter 100, the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 is controlled to conduct, so as to realize the connection state between the high-pressure end and the low-pressure end of the differential pressure transmitter 100, thereby avoiding the problem of over-range differential pressure caused by the mismatch of the pressure increase rates between the high-pressure end and the low-pressure end of the differential pressure transmitter 100. Moreover, until the gas pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter 100 reach the first preset pressure, the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter 100 is controlled to cut off, so as to realize the independent state of the high-pressure end and the low-pressure end of the differential pressure transmitter 100, ensuring that the gas pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter 100 can be adjusted separately, and further realizing the differential pressure under static pressure.

[0070] It should be noted that in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0071] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present disclosure includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the involved functions, rather than in the order shown or discussed. This should be understood by those skilled in the technical field to which the embodiments of the present disclosure belong.

[0072] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A differential pressure transmitter static pressure influence calibration device, characterized in that Comprising: A pressure generating component, which is used to provide gas at a first preset pressure, and the first gas outlet end of the pressure generating component is connected to the high-pressure end of the differential pressure transmitter, and the second gas outlet end of the pressure generating component is connected to the low-pressure end of the differential pressure transmitter; A first pressure regulating component, which is arranged between the first gas outlet end of the pressure generating component and the high-pressure end of the differential pressure transmitter, and the first pressure regulating component is used to regulate the air pressure at the high-pressure end of the differential pressure transmitter to a second preset pressure; A second pressure regulating component, which is arranged between the second gas outlet end of the pressure generating component and the low-pressure end of the differential pressure transmitter, and the second pressure regulating component is used to regulate the air pressure at the low-pressure end of the differential pressure transmitter to a third preset pressure.

2. The differential pressure transmitter static pressure influence calibration device according to claim 1, wherein, The calibration device further comprises: A balance component, the first end of which is connected to the high-pressure end of the differential pressure transmitter, and the second end of which is connected to the low-pressure end of the differential pressure transmitter; Wherein, when the pressure generating component provides gas at an initial pressure, the first end and the second end of the balance component are conducted, and until the gas pressure provided by the pressure generating component reaches the first preset pressure, the first end and the second end of the balance component are cut off.

3. The static pressure influence calibration device for the differential pressure transmitter according to claim 2, wherein, The balance component comprises: A balance valve, the first end of which is connected to the high-pressure end of the differential pressure transmitter, and the second end of which is connected to the low-pressure end of the differential pressure transmitter; Wherein, when the pressure generating component provides gas at an initial pressure, the first end and the second end of the balance valve are conducted, and until the gas pressure provided by the pressure generating component reaches the first preset pressure, the first end and the second end of the balance valve are cut off.

4. The static pressure influence calibration device for the differential pressure transmitter according to claim 1, characterized in that, The first pressure regulating component comprises: A first pressure regulator, which is arranged between the first gas outlet end of the pressure generating component and the high-pressure end of the differential pressure transmitter, and the first pressure regulator is used to regulate the air pressure at the high-pressure end of the differential pressure transmitter to the second preset pressure; Wherein, the pressure regulating range of the first pressure regulator is -50 kPa - 50 kPa, and the pressure regulating accuracy of the first pressure regulator is 0.01 kPa.

5. The static pressure influence calibration device for the differential pressure transmitter according to claim 1, wherein, The first pressure regulating component comprises: A second pressure regulator, which is arranged between the second gas outlet end of the pressure generating component and the low-pressure end of the differential pressure transmitter, and the second pressure regulator is used to regulate the air pressure at the low-pressure end of the differential pressure transmitter to the third preset pressure; Wherein, the pressure regulating range of the second pressure regulator is -50 kPa - 50 kPa, and the pressure regulating accuracy of the second pressure regulator is 0.01 kPa.

6. The differential pressure transmitter static pressure influence calibration device according to claim 1, characterized in that, The calibration device further comprises: A first pressure detection unit, the detection end of which is arranged at the high-pressure end of the differential pressure transmitter, and the first pressure detection unit is used to detect the air pressure at the high-pressure end of the differential pressure transmitter; A second pressure detection unit, the detection end of which is arranged at the low-pressure end of the differential pressure transmitter, and the second pressure detection unit is used to detect the air pressure at the low-pressure end of the differential pressure transmitter.

7. The differential pressure transmitter static pressure influence calibration device according to claim 6, characterized in that, The first pressure detection unit comprises: The first digital pressure gauge, the detection end of the first digital pressure gauge is arranged at the high-pressure end of the differential pressure transmitter, and the first digital pressure gauge is used to detect the air pressure at the high-pressure end of the differential pressure transmitter.

8. The static pressure influence calibration device for differential pressure transmitters according to claim 6, characterized in that, The second pressure detection unit includes: A second digital pressure gauge, the detection end of the second digital pressure gauge is arranged at the low-pressure end of the differential pressure transmitter, and the second digital pressure gauge is used to detect the air pressure at the low-pressure end of the differential pressure transmitter.

9. The static pressure influence calibration device for differential pressure transmitters according to claim 1, characterized in that, The pressure generating assembly includes: An air source, a pressure reducer and a pressure regulating valve. The air outlet end of the air source is connected to the air inlet end of the pressure reducer, and the air inlet end of the pressure regulating valve is connected to the air outlet end of the pressure reducer. The air outlet end of the pressure regulating valve is respectively connected to the high-pressure end and the low-pressure end of the differential pressure transmitter. The pressure regulating valve is used to provide gas with the first preset pressure; Wherein, the first pressure regulating component is arranged between the air outlet end of the pressure regulating valve and the high-pressure end of the differential pressure transmitter, and the second pressure regulating component is arranged between the air outlet end of the pressure regulating valve and the low-pressure end of the differential pressure transmitter.

10. A calibration method for the static pressure influence of a differential pressure transmitter, characterized in that, Includes: Control the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter to conduct; Provide gas with an initial pressure to the high-pressure end and the low-pressure end of the differential pressure transmitter until the gas pressures at the high-pressure end and the low-pressure end of the differential pressure transmitter reach the first preset pressure; Control the passage between the high-pressure end and the low-pressure end of the differential pressure transmitter to cut off; Adjust the air pressure at the high-pressure end of the differential pressure transmitter to the second preset pressure, and adjust the air pressure at the low-pressure end of the differential pressure transmitter to the third preset pressure; Calibrate the differential pressure transmitter according to the difference between the second preset pressure and the third preset pressure.

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