Installation method, flow measurement method and auxiliary installation tooling of insertion flow meter

Abstract

The present disclosure provides an installation method, a flow measurement method and an auxiliary installation tool for an insertion flow meter, and relates to the field of flow measurement technology. The installation method includes: determining the outer diameter of the measured pipeline, the measured pipeline is used to accommodate the measured fluid; extending the insertion rod into the measured pipeline along the radial direction of the measured pipeline until the first end of the insertion rod contacts the inner wall of the measured pipeline, and measuring the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipeline as a distance parameter; based on the distance parameter and the outer diameter of the pipeline, determining the installation height of the insertion flow meter; based on the installation height, installing the insertion flow meter to the measured pipeline. Through this method, when installing the insertion flow meter, there is no need to determine the specifications of the measured pipeline in advance, which solves the problem that the installation height of the flow meter is difficult to determine due to the unknown specifications of the pipeline on site, and improves the measurement accuracy and installation convenience of the insertion flow meter.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flow measurement, and in particular to an installation method of an insertion flow meter, a flow measurement method and an auxiliary installation tool. Background Art

[0002] The detection element of the insertion flow meter is installed on the probe rod. During the installation of the insertion flow meter, you only need to insert the probe rod through the wall of the measured pipeline, and then you can use its detection element to directly measure the flow rate of the fluid in the measured pipeline. It has the advantages of simple installation and can be reused on different pipelines.

[0003] During the production process of the flow meter, the quantitative relationship between the standard flow and the detection element signal is calibrated in advance on the standard flow device, and the calibration flow is directly related to the specifications of the calibration pipeline. During on-site installation, the insertion flow meter needs to be calibrated according to the actual specifications of the measured pipeline, and the specific installation depth needs to be determined. However, for the completed measured pipeline, it is difficult to determine its actual specifications, which in turn affects the accuracy of the measurement results. Summary of the invention

[0004] In view of this, an embodiment of the present disclosure provides an installation method of an insertion flow meter, a flow measurement method, and an auxiliary installation tool.

[0005] In a first aspect, an embodiment of the present disclosure provides an installation method for an insertion flow meter, wherein the insertion flow meter includes an insertion rod, the insertion rod includes a positioning reference point, and the positioning reference point represents a point on the insertion rod. The installation method includes: determining the outer diameter of the measured pipeline, the measured pipeline is used to accommodate the measured fluid; extending the insertion rod into the measured pipeline along the radial direction of the measured pipeline until the first end of the insertion rod contacts the inner wall of the measured pipeline, and measuring the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipeline as a distance parameter; determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline, the installation height represents the distance between the positioning reference point and the outer wall of the measured pipeline after the installation is completed; installing the insertion flow meter to the measured pipeline based on the installation height.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the insertion flow meter also includes a detection element, which is arranged on the insertion rod, and the installation height of the insertion flow meter is determined based on the distance parameter and the outer diameter of the pipe, including: determining a first parameter and a second parameter of the insertion rod, the first parameter characterizing the distance between the positioning reference point and the first end of the insertion rod, and the second parameter characterizing the distance between the positioning reference point and the detection element; obtaining an installation position coefficient of the insertion flow meter, the installation position coefficient characterizing the relative position of the detection element in the calibration pipe during the calibration process of the insertion flow meter; determining the installation height based on the distance parameter, the outer diameter of the pipe, the first parameter, the second parameter and the installation position coefficient.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the insertion flow meter also includes a detection element, and the installation height of the insertion flow meter is determined based on the distance parameter and the outer diameter of the pipe, including: determining the inner diameter and wall thickness of the measured pipe based on the distance parameter and the outer diameter of the pipe; determining the installation depth of the detection element in the measured pipe based on the installation position coefficient of the insertion flow meter and the inner diameter of the pipe; and determining the installation height based on the installation depth and the pipe wall thickness.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the inner diameter and wall thickness of the measured pipe are determined based on the distance parameter and the outer diameter of the pipe, including: determining a first parameter of the insertion rod, the first parameter characterizing the distance between the positioning reference point and the first end of the insertion rod; determining the inner diameter and wall thickness of the pipe based on the distance parameter, the outer diameter of the pipe and the first parameter.

[0009] In a second aspect, an embodiment of the present disclosure provides a flow measurement method, comprising: based on the installation method of the insertion flow meter of the first aspect mentioned above, installing the insertion flow meter to a measured pipe, the measured pipe being used to accommodate the measured fluid; determining the inner diameter of the measured pipe; based on the inner diameter of the measured pipe, determining a flow correction coefficient of the insertion flow meter; based on the flow correction coefficient, determining the flow information of the measured fluid.

[0010] In combination with the second aspect, in certain implementations of the second aspect, the flow correction coefficient of the insertion flow meter is determined based on the inner diameter of the measured pipeline, including: determining the inner diameter of the calibration pipeline of the insertion flow meter; and determining the flow correction coefficient based on the inner diameter of the calibration pipeline and the inner diameter of the measured pipeline.

[0011] In a third aspect, an embodiment of the present disclosure provides an auxiliary installation tool, which is applied to an insertion flow meter, and the insertion flow meter includes an insertion rod. The auxiliary installation tool includes: at least two tube body positioning seats, which are arranged on the measured pipe, and the measured pipe is used to accommodate the measured fluid; a base, which is connected to the tube body positioning seat, and the base includes a limit groove, and the shape of the limit groove is adapted to the pipe connection base of the insertion flow meter, and the pipe connection base is used to fix the insertion flow meter so that the insertion flow meter can be installed to the measured pipe; a scale column, which is installed on the base, and the scale column includes scale lines, and the scale lines are used to measure the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipe, so as to calculate the installation height of the insertion flow meter, and install the insertion flow meter to the measured pipe based on the installation height.

[0012] In combination with the third aspect, in certain implementations of the third aspect, the scale column also includes a positioning groove and a flow direction pointer, the first end of the flow direction pointer is slidably connected to the positioning groove, the second end of the flow direction pointer is fixedly connected to the insertion rod, and the length direction of the flow direction pointer is parallel to the flow direction of the fluid being measured.

[0013] In combination with the third aspect, in certain implementations of the third aspect, the base further includes a through hole, the scale column is mounted on the base through the through hole, and a side wall of the through hole is perpendicular to the plane where the base is located.

[0014] In combination with the third aspect, in certain implementations of the third aspect, at least two tube body positioning seats are spaced apart along the flow direction of the fluid to be measured, and the tube body positioning seat includes a first surface and a second surface that are relatively arranged; the first surface includes a positioning mechanism, and the positioning mechanism is used to determine the relative position of the base and the tube body positioning seat; the center of the second surface is recessed inward to form a groove-like structure, and the groove-like structure includes a first side wall and a second side wall, and at least a portion of the first side wall and at least a portion of the second side wall are respectively in contact with the tube wall of the measured pipeline.

[0015] In the installation method of the insertion flow meter provided in the present disclosure, the insertion rod of the insertion flow meter is used to determine the specification parameters of the measured pipeline, and then the installation height of the insertion flow meter is determined. Therefore, when installing the insertion flow meter, it is not necessary to determine the specifications of the measured pipeline in advance, which solves the problem of difficulty in determining the installation height of the flow meter due to unknown specifications of the pipeline on site, and improves the measurement accuracy and installation convenience of the insertion flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of a scenario applicable to the embodiment of the present disclosure.

[0017] Figure 2 The figure is a schematic flow chart of an installation method of an insertion flow meter provided in one embodiment of the present disclosure.

[0018] Figure 3 The diagram shows a schematic diagram of a first end of an insertion rod provided by an embodiment of the present disclosure in contact with an inner wall of a pipe to be tested.

[0019] Figure 4 Shown is a schematic diagram of an insertion installation on a measured pipeline provided by an embodiment of the present disclosure.

[0020] Figure 5 The figure is a schematic flow chart of the steps of determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline provided in one embodiment of the present disclosure.

[0021] Figure 6 The figure is a schematic flow chart of the steps of determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline provided in another embodiment of the present disclosure.

[0022] Figure 7 The figure is a schematic flow chart of the steps of determining the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline provided by an embodiment of the present disclosure.

[0023] Figure 8 Shown is a flow chart of a flow measurement method provided in one embodiment of the present disclosure.

[0024] Fig. 9 The figure is a flow chart of the steps of determining the flow correction coefficient of the insertion flow meter based on the inner diameter of the measured pipeline provided by an embodiment of the present disclosure.

[0025] Fig.10 Shown is a schematic structural diagram of an auxiliary installation tool provided in one embodiment of the present disclosure.

[0026] Fig.11 Shown is a top view schematic diagram of an auxiliary installation tool provided in one embodiment of the present disclosure.

[0027] Fig.12a Shown is a schematic structural diagram of a tube body positioning seat provided in one embodiment of the present disclosure.

[0028] Figure 12b Shown is a schematic structural diagram of a tube body positioning seat provided in another embodiment of the present disclosure.

[0029] Fig.12c Shown is a schematic structural diagram of a tube body positioning seat provided in yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0031] Insertion flowmeter mainly includes an insertion rod and a detection element, and the detection element is usually installed at the end of the insertion rod. The end of the insertion rod can be inserted into the measured pipeline, so that the detection element at the end directly senses the measured fluid in the pipeline, and has a simple structure, easy installation and maintenance, and low cost.

[0032] During the measurement process, the detection element of the insertion flow meter responds to the flow of the measured fluid and generates a flow rate signal proportional to the local flow rate near the detection element. The flow rate signal can reflect the local flow rate near the detection element. Based on the local flow rate near the detection element and the cross-sectional area of ​​the measured pipeline, the flow rate of the measured fluid in the measured pipeline can be calculated. Specifically, flow rate = flow rate × cross-sectional area. Therefore, during the actual measurement process, the insertion flow meter needs to be calibrated according to the actual specification parameters of the measured pipeline.

[0033] However, as mentioned above, for completed pipelines, the pipeline execution standard of the pipeline being tested is uncertain, and there is no cross-section cut of the pipeline being tested on site, so it is difficult to measure and obtain the actual specification parameters of the pipeline being tested. Since the pipe wall of the pipeline being tested has a certain thickness, the cross-sectional area calculated directly using the outer diameter of the pipeline being tested is inaccurate. The inner diameter or wall thickness of the pipeline being tested is difficult to determine, so when the inner diameter of the pipeline being tested differs greatly from the inner diameter of the calibration pipeline, it will cause a large measurement deviation.

[0034] At the same time, in the pipeline, the flow velocity distribution of the fluid is usually non-uniform, and the overall flow velocity is faster in the center and slower near the pipe wall. Therefore, in the process of installing the insertion flow meter in the measured pipe, it is necessary to consider the final relative position of the detection element in the measured pipe, so that the relative position of the detection element in the measured pipe is consistent with the relative position of the detection element in the calibration pipe during the calibration process. For example, during the calibration process, the detection element is located at the center of the calibration pipe, so in the actual measurement process, the detection element should also be located at the center of the measured pipe. In the case where the wall thickness of the measured pipe cannot be clearly determined, it is also difficult to determine the appropriate installation depth.

[0035] In view of the above technical problems, the present disclosure provides an installation method for an insertion flowmeter. The insertion flowmeter includes an insertion rod, and the insertion rod includes a positioning reference point, and the positioning reference point represents a point on the insertion rod. The installation method includes determining the outer diameter of the measured pipeline, and the measured pipeline is used to accommodate the measured fluid; extending the insertion rod into the measured pipeline along the radial direction of the measured pipeline until the first end of the insertion rod contacts the inner wall of the measured pipeline, and measuring the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipeline as a distance parameter; based on the distance parameter and the outer diameter of the pipeline, determining the installation height of the insertion flowmeter, the installation height represents the distance between the positioning reference point and the outer wall of the measured pipeline after the installation is completed; installing the insertion flowmeter to the measured pipeline based on the installation height. Through this method, when installing the insertion flowmeter, there is no need to determine the specifications and dimensions of the measured pipeline in advance, which solves the problem that the installation height of the flowmeter is difficult to determine due to the unknown specifications and parameters of the pipeline on site, and improves the measurement accuracy and installation convenience of the insertion flowmeter.

[0036] Figure 1 FIG. 1 is a schematic diagram of a scenario to which the embodiment of the present disclosure is applicable. Figure 1 As shown, the implementation environment includes an insertion flow meter 110 and a measured pipeline 120 .

[0037] The insertion flow meter 110 includes a meter head and an insertion rod 111, and a detection element 112 is provided at one end of the insertion rod 111. The insertion flow meter 110 may include a thermal flow meter, a differential pressure flow meter, etc., and accordingly, according to the type of the insertion flow meter 110, the detection element 112 may include a temperature sensor, a differential pressure sensor, etc. The present disclosure does not specifically limit the types of the insertion flow meter and the detection element.

[0038] The measured pipeline 120 is used to accommodate the measured fluid. A pipeline connection base is provided on the measured pipeline 120, and the pipeline connection base is roughly a tubular structure. During the installation of the insertion flowmeter 110 in the measured pipeline 120 based on the installation method provided in the embodiment of the present disclosure, one end of the insertion rod 111 provided with the detection element 112 extends into the measured pipeline 120 along the pipeline connection base and is fixed by the pipeline connection base. More specifically, the pipeline connection base includes an insertion rod fastening nut and a seal. When the detection element 112 is located at a suitable installation depth in the measured pipeline 120, the relative movement between the insertion flowmeter 110 and the measured pipeline 120 is limited by the insertion rod fastening nut and the seal, thereby ensuring the accuracy of the position of the detection element 112.

[0039] During the installation process, the auxiliary installation tooling provided in the embodiment of the present disclosure can be used to determine the installation height of the insertion flow meter 110, and the insertion flow meter 110 can be installed on the measured pipe 120 based on the installation height. At this time, the detection element 112 of the insertion flow meter 110 is located at a suitable installation depth position in the measured pipe 120.

[0040] After the installation is completed, based on the flow measurement method provided in the embodiment of the present disclosure, the flow correction coefficient corresponding to the measured pipeline is determined, and the flow of the measured fluid is determined based on the flow correction coefficient, thereby improving the accuracy of the measurement result.

[0041] The following is an example of the installation method of the insertion flow meter provided in the embodiment of the present disclosure, with reference to the accompanying drawings.

[0042] Figure 2 FIG. 1 is a flow chart of a method for installing an insertion flow meter according to an embodiment of the present disclosure. Figure 2 As shown, the installation method of the insertion flow meter provided in the embodiment of the present disclosure includes the following steps.

[0043] S210, determining the outer diameter of the measured pipeline.

[0044] The outer diameter of the measured pipeline is the diameter of the outside of the measured pipeline, that is, the diameter of the outer wall of the measured pipeline.

[0045] The outer diameter of the measured pipe can be determined by using a length measuring device, for example, by directly measuring the outer diameter of the pipe based on a caliper, or by measuring the circumference of the outer wall of the measured pipe based on a tape measure, and calculating the outer diameter of the pipe based on the circumference.

[0046] S220, extending the rod into the measured pipe along the radial direction of the measured pipe until the first end of the rod contacts the inner wall of the measured pipe, and measuring the distance between the positioning reference point of the rod and the outer wall of the measured pipe as a distance parameter.

[0047] Continue to refer Figure 1 The insertion flow meter includes a plug rod 111, and the plug rod 111 includes a positioning reference point P. The positioning reference point P is a point on the plug rod, which is a reference position of the plug rod required in the process of determining the installation depth. More specifically, the positioning reference point P is located on the side of the plug rod away from the detection element 112, and the distance between the positioning reference point P and the end of the plug rod should be greater than the sum of the inner diameter of the measured pipe and the wall thickness, wherein the inner diameter of the pipe is the diameter of the inner wall of the pipe. When the plug rod 111 is extended into the measured pipe along the radial direction of the measured pipe, the positioning reference point P can be observed.

[0048] The position of the positioning reference point P can be determined in advance during the production process of the insertion flow meter, or can be determined during the installation process of the insertion flow meter based on the outer diameter of the measured pipe, and the present disclosure does not impose specific limitations on this.

[0049] The plunger is inserted into the pipeline to be tested along the radial direction of the pipeline to be tested until the first end of the plunger contacts the inner wall of the pipeline to be tested, and the first end of the plunger is the side where the detection element is set. Then, the distance between the positioning reference point of the plunger and the outer wall of the pipeline to be tested is measured as the distance parameter.

[0050] Figure 3 FIG. 1 is a schematic diagram showing that the first end of the plunger provided by an embodiment of the present disclosure is in contact with the inner wall of the pipeline to be tested. Figure 3 As shown, the end of the first end of the insertion rod contacts the inner wall of the measured pipeline, and the contact position is the lowest point of the inner wall of the measured pipeline.

[0051] The distance between the positioning reference point P and the outer wall of the measured pipe is measured using a length measuring instrument to obtain a distance parameter L3.

[0052] S230, determining an installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline.

[0053] Figure 4FIG. 1 is a schematic diagram of an insert-type installation on a pipeline to be tested provided by an embodiment of the present disclosure. Figure 4 As shown in the figure, the installation height H represents the distance between the positioning reference point P and the outer wall of the measured pipe after the insertion flow meter is installed and in normal working condition. After determining the distance parameter and the outer diameter of the pipe, the installation height of the insertion flow meter can be calculated.

[0054] For example, after determining the distance parameter, the length of the portion of the insertion rod located in the measured pipe can be calculated. This length combined with the outer diameter of the pipe can be used to calculate the wall thickness of the measured pipe, thereby determining the installation height of the insertion flow meter.

[0055] S240, installing the insertion flow meter to the measured pipeline based on the installation height.

[0056] Based on the installation height and positioning reference point, the insertion flow meter is installed on the measured pipeline.

[0057] In the disclosed embodiment, the insertion rod of the insertion flow meter is used to determine the specification parameters of the measured pipeline, and then determine the installation height of the insertion flow meter. Therefore, when installing the insertion flow meter, it is not necessary to determine the specifications of the measured pipeline in advance, which solves the problem of difficulty in determining the installation height of the flow meter due to unknown specifications of the pipeline on site, and improves the measurement accuracy and installation convenience of the insertion flow meter.

[0058] Several specific implementation methods for determining the installation height of the insertion flow meter are described below.

[0059] Figure 5 FIG. 1 is a flow chart showing the steps of determining the installation height of an insertion flow meter based on a distance parameter and a pipe outer diameter according to an embodiment of the present disclosure. Figure 5 As shown, the step of determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline provided in the embodiment of the present disclosure includes the following steps.

[0060] S510, determining a first parameter and a second parameter of the insertion rod.

[0061] The insertion flow meter also includes a detection element. The detection element is arranged on the insertion rod and is close to the first end of the insertion rod. After the positioning reference point of the insertion rod is determined, the first parameter and the second parameter of the insertion rod can be determined by using a length measuring device.

[0062] Continue to refer Figure 3 The first parameter L1 represents the distance between the positioning reference point P and the first end of the insertion rod, and the second parameter L2 represents the distance between the positioning reference point P and the detection element 112. Figure 3 It can be seen that (L2 - L1) is the distance between the detection element 112 and the first end of the insertion rod.

[0063] S520, obtaining an installation position coefficient of the insertion flow meter.

[0064] The installation position coefficient of the insertion flow meter is determined during the calibration process. Specifically, the installation position coefficient of the insertion flow meter represents the relative position of the detection element in the calibration pipeline during the calibration process of the insertion flow meter, which can be specifically expressed as y=h0 / D i,0 , where y represents the installation position coefficient; D i,0 represents the inner diameter of the calibration pipe; h0 represents the installation depth of the detection element in the calibration pipe during the calibration process, wherein the installation depth represents the distance between the detection element and the inner wall of the measured pipe.

[0065] S530, determining the installation height based on the distance parameter, the outer diameter of the pipeline, the first parameter, the second parameter, and the installation position coefficient.

[0066] Based on the distance parameter, the outer diameter of the pipe, the first parameter, the second parameter and the installation position coefficient, the installation height of the insertion flow meter can be determined, which can be specifically expressed as the following formula.

[0067]

[0068] Wherein, H represents the installation height of the insertion flow meter; L1, L2, L3 represent the first parameter, the second parameter and the distance parameter respectively; D o It represents the outer diameter of the measured pipeline; y represents the installation position coefficient of the insertion flow meter.

[0069] In the disclosed embodiment, the installation height is calculated based on the installation position coefficient of the insertion flow meter and related parameters so that after the installation is completed, the relative position of the detection element in the measured pipe is consistent with the relative position of the detection element in the calibration pipe during the calibration process, thereby improving the accuracy of the measurement results.

[0070] In other embodiments, the step of determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline can also be implemented as the following steps. Figure 6 As shown, the step of determining the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline provided in the embodiment of the present disclosure includes the following steps.

[0071] S610: Determine the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline.

[0072] As described above, after determining the distance parameter L3, the length of the portion of the plunger located in the measured pipeline can be calculated based on the distance from the positioning reference point to the first end of the plunger. Figure 3It can be found that the length of this part of the rod is the sum of the inner diameter of the measured pipe and the wall thickness, while the outer diameter of the pipe is the sum of the inner diameter of the pipe and twice the wall thickness. Therefore, based on the length of this part of the rod and the outer diameter of the pipe, the wall thickness t and the inner diameter D of the pipe can be obtained. i .

[0073] S620, determining the installation depth of the detection element in the measured pipeline based on the installation position coefficient of the insertion flow meter and the inner diameter of the pipeline.

[0074] Continue to refer Figure 4 The installation depth h of the detection element in the measured pipeline is the distance between the detection element 112 and the highest point of the inner wall. During the installation process, the installation depth h of the insertion flow meter should satisfy h=y·D i , where y represents the installation position coefficient of the insertion flow meter; D i Indicates the inner diameter of the pipe being tested.

[0075] When the installation depth of the detection element in the measured pipeline is h, y=h / D is satisfied. i =h0 / D i,0 That is, the relative position of the detection element of the insertion flow meter in the measured pipe should be consistent with the relative position of the detection element in the calibration pipe during the calibration process to improve the accuracy of the measurement results.

[0076] For example, if the installation position coefficient y of the insertion flow meter is 1 / 3, the installation depth h of the detection element should be D i / 3. If the installation position coefficient y of the insertion flow meter is 1 / 2, the installation depth h of the detection element should be D i / 2, that is, the detection element is located in the center of the measured pipe.

[0077] S630: Determine the installation height based on the installation depth and the pipe wall thickness.

[0078] After determining the installation depth h of the detection element in the measured pipe, the installation height of the insertion flow meter can be determined based on the installation depth h and the pipe wall thickness t, which can be specifically expressed as the following formula.

[0079]

[0080] Wherein, L2 represents the distance between the positioning reference point of the insertion flow meter and the detection element, i.e., the second parameter of the insertion rod; h represents the installation depth of the detection element; t represents the installation depth; y represents the installation position coefficient of the insertion flow meter; D i Indicates the inner diameter of the pipe being tested.

[0081] Based on the above steps, the installation height of the insertion flow meter can be determined so that after installation, the relative position of the detection element in the measured pipe is consistent with the relative position of the detection element in the calibration pipe during the calibration process, thereby improving the accuracy of the measurement results.

[0082] Next, a specific implementation method of determining the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline is introduced. Figure 7 As shown, the step of determining the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline provided in the embodiment of the present disclosure includes the following steps.

[0083] S611, determine the first parameter of the plunger.

[0084] The first parameter L1 represents the distance between the positioning reference point of the insertion rod and the first end of the insertion rod. This step is similar to the step of determining the first parameter of the insertion rod in the above embodiment, and the details can be referred to the description of the above embodiment.

[0085] S612, determining the inner diameter and wall thickness of the pipeline based on the distance parameter, the outer diameter of the pipeline and the first parameter.

[0086] The difference between the first parameter L1 and the distance parameter L3 should be equal to the outer diameter of the pipe D o The difference between the wall thickness t, that is ,Right now .

[0087] Pipe outer diameter D o is the inner diameter of the pipe D i The sum of the two times of the pipe wall thickness t, that is, the inner diameter of the pipe .

[0088] In the disclosed embodiment, the inner diameter and wall thickness of the measured pipeline can be determined by using the insertion rod. Therefore, during the installation of the insertion flow meter, it is not necessary to determine the pipeline implementation standard of the measured pipeline in advance, which solves the problem of difficult determination of pipeline specification parameters and reduces the difficulty of installation.

[0089] Combination of the above Figures 1 to 7 , describes in detail the installation method embodiment of the present disclosure. After installation, the flow rate of the measured fluid in the measured pipeline can be measured based on the insertion flow meter. The flow measurement method provided by the embodiment of the present disclosure is illustrated below with reference to the accompanying drawings of the specification.

[0090] Figure 8 FIG. 1 is a flow chart of a flow measurement method provided by an embodiment of the present disclosure. Figure 8 As shown, the flow measurement method provided in the embodiment of the present disclosure includes the following steps.

[0091] S810, install the insertion flow meter to the measured pipeline.

[0092] Based on the method provided in any of the above embodiments, the insertion flow meter is installed in the measured pipeline. After installation, the relative position of the detection element of the insertion flow meter in the measured pipeline is consistent with the relative position of the detection element in the calibration pipeline during the calibration process.

[0093] S820, determining the inner diameter of the measured pipeline.

[0094] The inner diameter of the measured pipeline can be determined based on the method in the above embodiment, which will not be described in detail here.

[0095] S830: Determine a flow correction coefficient of the insertion flow meter based on the inner diameter of the measured pipeline.

[0096] The flow correction coefficient of the insertion flow meter characterizes the proportional relationship between the actual flow rate of the measured fluid and the flow meter reading. Specifically, the flow meter reading is determined based on the flow velocity signal generated by the detection element and the cross-sectional area of ​​the calibration pipe. When the cross-sectional area of ​​the measured pipe is inconsistent with the cross-sectional area of ​​the calibration pipe, the uncorrected flow meter reading is inconsistent with the actual flow rate of the measured fluid. In this case, the flow correction coefficient of the insertion flow meter needs to be determined.

[0097] Since the cross-sectional area of ​​the measured pipeline can be calculated based on the inner diameter of the pipeline, the flow correction coefficient of the insertion flow meter can be determined based on the inner diameter of the measured pipeline. Based on the above description, it can be known that the flow correction coefficient corresponds to the measured pipeline, that is, for the same insertion flow meter, different measured pipelines correspond to their own flow correction coefficients.

[0098] S840, determining flow information of the measured fluid based on the flow correction coefficient.

[0099] After the flow correction coefficient is determined, the flow information of the measured fluid can be determined based on the flow correction coefficient and the uncorrected flow information.

[0100] In the disclosed embodiment, the flow correction coefficient can be used to correct the measurement error caused by the difference in cross-sectional area between the measured pipeline and the calibration pipeline, thereby improving the accuracy of the measurement result.

[0101] The following will continue to introduce how to determine the flow correction factor.

[0102] Fig. 9 FIG. 1 is a flow chart showing the steps of determining the flow correction coefficient of an insertion flow meter based on the inner diameter of the measured pipeline according to an embodiment of the present disclosure. Fig. 9 As shown, the step of determining the flow correction coefficient of the insertion flow meter based on the inner diameter of the measured pipeline provided in the embodiment of the present disclosure includes the following steps.

[0103] S831, determine the inner diameter of the calibration pipe of the insertion flow meter.

[0104] The inner diameter of the calibration pipe may be recorded in advance in a measuring module of the insertion flow meter, or may be written in an instruction manual of the insertion flow meter.

[0105] S832, determining a flow correction coefficient based on the inner diameter of the calibration pipeline and the inner diameter of the measured pipeline.

[0106] Exemplarily, the flow correction coefficient K can be expressed as the following formula.

[0107]

[0108] Among them, D i Indicates the inner diameter of the measured pipeline; D i,0 Indicates the inner diameter of the calibration pipe, that is, the inner diameter of the calibration pipe.

[0109] Correspondingly, the flow information of the measured fluid can be expressed as , where Q represents the flow information of the measured fluid; Indicates uncorrected flow information.

[0110] Alternatively, the flow correction factor K can also be expressed as Correspondingly, the flow information of the measured fluid can be expressed as .

[0111] In the embodiment of the present disclosure, the expression form of the flow correction coefficient and the method for determining the flow information of the measured fluid based on the flow correction coefficient are introduced. Based on the above steps, the accuracy of the measurement result can be improved.

[0112] Combination of the above Figures 1 to 9 , describes in detail the installation method embodiment and the flow measurement method embodiment of the present disclosure, and the auxiliary installation tool embodiment of the present disclosure is described in detail in conjunction with the accompanying drawings. It should be understood that the description of the method embodiment corresponds to the description of the auxiliary installation tool embodiment, so the part that is not described in detail can refer to the previous method embodiment.

[0113] Fig.10 Shown is a schematic structural diagram of an auxiliary installation tool provided in one embodiment of the present disclosure. Fig.11 Shown is a top view schematic diagram of an auxiliary installation tool provided in one embodiment of the present disclosure.

[0114] Auxiliary installation tools are used in the installation process of insertion flow meters. Specifically, Fig.10 As shown, the auxiliary installation tool includes at least two tube body positioning seats 101, a base 102, and a scale column 103.

[0115] At least two pipe body positioning seats 101 are arranged at intervals on the measured pipe. A fixing stud is arranged on the side of the pipe body positioning seat 101 facing the base 102, and correspondingly, a screw hole adapted to the fixing stud is arranged on the side of the base 102 facing the pipe body positioning seat 101, and the base 102 is connected to the pipe body positioning seat 101 through the fixing stud and the screw hole.

[0116] like Fig.11 As shown, the base 102 includes a limiting groove 1021 on the side facing the insertion flow meter, and the shape of the limiting groove 1021 is adapted to the pipe connection base of the insertion flow meter. The pipe connection base is a tubular structure for fixing the insertion flow meter. During the installation of the insertion flow meter, the limiting groove 1021 can accommodate the pipe connection base, and the side wall of the limiting groove 1021 abuts against the side wall of the pipe connection base, so as to determine the positional relationship between the base 102 and the insertion flow meter based on the pipe connection base and the limiting groove 1021.

[0117] The scale column 103 is mounted on the base 102. The scale column 103 is provided with a scale line 1031 (indicated by a dotted line), and the scale line 1031 is used to measure the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipeline, so as to calculate the installation height of the insertion flow meter, and install the insertion flow meter to the measured pipeline based on the installation height.

[0118] In some embodiments, continue to refer to Fig.10 , the scale column 103 also includes a positioning groove 1032 and a flow direction pointer 1033. The first end of the flow direction pointer 1033 is slidably connected to the positioning groove 1032, and the second end of the flow direction pointer 1033 is fixedly connected to the plunger. Specifically, a groove can be set at the location of the positioning reference point of the plunger, and the second end of the flow direction pointer 1033 is inserted into the groove, so that the flow direction pointer 1033 is fixedly connected to the plunger. During the installation of the insertion flow meter, the plunger of the insertion flow meter can move up and down along the radial direction of the measured pipeline. During the movement, the plunger drives the flow direction pointer 1033 to move up and down, so that the first end of the flow direction pointer 1033 slides along the positioning groove 1032. The positioning groove 1032 is arranged in parallel with the scale line 1031, so during the movement of the flow direction pointer 1033, the scale line reading pointed to by the first end of the flow direction pointer 1033 changes accordingly, so that the distance between the positioning reference point of the plunger and the outer wall of the measured pipeline can be measured based on the scale column 103.

[0119] The length direction of the flow direction pointer 1033 is parallel to the flow direction of the measured fluid. Thus, the flow direction pointer 1033 can indicate the flow direction of the measured fluid, so that the detection element of the insertion flow meter can be correctly placed on the path of the fluid flow to ensure the accuracy of the measurement result.

[0120] In some embodiments, continue to refer to Fig.11 The base 102 further includes a through hole 1022, the side wall of which is perpendicular to the plane where the base 102 is located. One end of the scale column 103 passes through the base 102 along the through hole 1022 to be installed on the base 102 through the through hole 1022, so that the scale column 103 is perpendicular to the plane where the base 102 is located.

[0121] At the same time, the length direction of the flow direction pointer 1033 is also perpendicular to the length direction of the scale column 103. Based on the joint action of the base 102 and the flow direction pointer 1033, the length direction of the insertion rod is parallel to the length direction of the scale column 103, so that the insertion rod can be inserted into the measured pipeline along the outer diameter of the measured pipeline. It is ensured that the insertion flow meter maintains a suitable posture during installation to improve the accuracy of the distance parameters of the measured pipeline and the installation height determined based on the insertion rod.

[0122] Fig.12a , 12b 12c are schematic diagrams of the structure of the tube body positioning seat provided in an embodiment of the present disclosure. Fig.10 , Fig.12a The pipe body positioning seat 101 includes a first surface 1011 and a second surface 1012 that are arranged opposite to each other. The first surface 1011 of the pipe body positioning seat 101 faces the base 102, and the second surface 1012 of the pipe body positioning seat 101 faces the measured pipe 120. The first surface 1011 of the pipe body positioning seat 101 includes a positioning mechanism 1013, and the positioning mechanism 1013 is used to determine the relative position of the base 102 and the pipe body positioning seat 101. Exemplarily, the positioning mechanism 1013 includes a positioning pin, and the base 102 is provided with a pin positioning groove opposite to each other, and the positioning pin can be wedged into the pin positioning groove to achieve the positioning function.

[0123] At least two tube body positioning seats 101 are arranged at intervals along the flow direction of the measured fluid. Therefore, the position of the base 102 is determined by at least two tube body positioning seats 101, and its length direction is parallel to the flow direction of the measured fluid, so as to ensure that the length direction of the flow direction pointer 1033 is parallel to the flow direction of the measured fluid.

[0124] The center of the second surface 1012 of the pipe body positioning seat 101 is recessed inward to form a groove structure. The groove structure includes a first side wall 1012a and a second side wall 1012b, at least part of the first side wall 1012a and at least part of the second side wall 1012b are in contact with the pipe wall of the measured pipe respectively.

[0125] like Fig.12a As shown, the first side wall 1012a and the second side wall 1012b can be respectively configured as a curved surface structure. Figure 12bAs shown, the first side wall 1012a and the second side wall 1012b can be respectively configured as a polygonal structure consisting of a plurality of inclined surfaces with different slopes. Fig.12c As shown, the first side wall 1012a and the second side wall 1012b can be respectively set to a stepped structure.

[0126] Through the above arrangement, the pipe body positioning seat can be more easily adapted to the measured pipes with different outer diameters, thereby improving the applicability of the auxiliary installation tooling.

[0127] It should be understood that the term "including" and its variations used in the present disclosure are open inclusions, that is, "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment". In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0128] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A method for installing an insertion flow meter, characterized in that: The insertion flow meter includes an insertion rod, the insertion rod includes a positioning reference point, the positioning reference point represents a point on the insertion rod, and the installation method includes: Determining the outer diameter of a pipeline to be measured, wherein the pipeline to be measured is used to contain the fluid to be measured; Extending the insertion rod into the measured pipeline along the radial direction of the measured pipeline until the first end of the insertion rod contacts the inner wall of the measured pipeline, and measuring the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipeline as a distance parameter; Based on the distance parameter and the outer diameter of the pipeline, determining the installation height of the insertion flow meter, the installation height representing the distance between the positioning reference point and the outer wall of the measured pipeline after the installation is completed; Installing the insertion flow meter to the measured pipeline based on the installation height; The insertion flow meter further includes a detection element disposed on the insertion rod, and the installation height of the insertion flow meter is determined based on the distance parameter and the outer diameter of the pipeline, including: Determine a first parameter and a second parameter of the insertion rod, wherein the first parameter represents a distance between the positioning reference point and the first end of the insertion rod, and the second parameter represents a distance between the positioning reference point and the detection element; Acquiring an installation position coefficient of the insertion flow meter, wherein the installation position coefficient represents a relative position of the detection element in a calibration pipeline during a calibration process of the insertion flow meter; The installation height is determined based on the distance parameter, the pipe outer diameter, the first parameter, the second parameter, and the installation position coefficient.

2. The installation method according to claim 1, characterized in that: The insertion flow meter further includes a detection element, and the determining of the installation height of the insertion flow meter based on the distance parameter and the outer diameter of the pipeline includes: Determine the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline; Determining the installation depth of the detection element in the measured pipeline based on the installation position coefficient of the insertion flow meter and the inner diameter of the pipeline; The installation height is determined based on the installation depth and the pipe wall thickness.

3. The installation method according to claim 2, characterized in that: The step of determining the inner diameter and wall thickness of the measured pipeline based on the distance parameter and the outer diameter of the pipeline includes: Determining a first parameter of the insertion rod, the first parameter representing a distance between the positioning reference point and a first end of the insertion rod; The inner diameter of the pipeline and the pipe wall thickness are determined based on the distance parameter, the outer diameter of the pipeline and the first parameter.

4. A flow measurement method, characterized in that: include: According to the installation method of the insertion flow meter according to any one of claims 1 to 3, the insertion flow meter is installed to a measured pipeline, wherein the measured pipeline is used to contain a measured fluid; Determining the inner diameter of the measured pipeline; Determining a flow correction coefficient of the insertion flow meter based on the inner diameter of the measured pipeline; Determining flow information of the measured fluid based on the flow correction coefficient; Wherein, determining the flow correction coefficient of the insertion flow meter based on the inner diameter of the measured pipeline includes: Determining the inner diameter of a calibration pipe of the insertion flow meter; The flow correction coefficient is determined based on the inner diameter of the calibration pipeline and the inner diameter of the measured pipeline.

5. An auxiliary installation tool, characterized in that: Applied to an insertion flow meter, the insertion flow meter includes an insertion rod, and the auxiliary installation tool includes: At least two tube body positioning seats are arranged on the measured pipeline, the measured pipeline is used to contain the measured fluid, and the at least two tube body positioning seats are arranged at intervals along the flow direction of the measured fluid; A base, connected to the pipe body positioning seat, the base includes a limiting groove, the shape of the limiting groove is adapted to the pipeline connection base of the insertion flow meter, the pipeline connection base is used to fix the insertion flow meter so that the insertion flow meter is installed to the measured pipeline, the base also includes a through hole, the scale column is installed on the base through the through hole, and the side wall of the through hole is perpendicular to the plane where the base is located; A scale column, mounted on the base, the scale column comprising scale lines, the scale lines being used to measure the distance between the positioning reference point of the insertion rod and the outer wall of the measured pipe, so as to calculate the installation height of the insertion flow meter, and install the insertion flow meter to the measured pipe based on the installation height; The scale column also includes a positioning groove and a flow direction pointer, the first end of the flow direction pointer is slidably connected to the positioning groove, the second end of the flow direction pointer is fixedly connected to the insertion rod, and the length direction of the flow direction pointer is parallel to the flow direction of the measured fluid.

6. The auxiliary installation tool according to claim 5, characterized in that: The tube body positioning seat comprises a first surface and a second surface which are arranged opposite to each other; The first surface includes a positioning mechanism, and the positioning mechanism is used to determine the relative position of the base and the tube body positioning seat; The center of the second surface is recessed inward to form a groove-like structure, and the groove-like structure includes a first side wall and a second side wall, and at least a portion of the first side wall and at least a portion of the second side wall are respectively in contact with the pipe wall of the measured pipe.

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