A kind of full-automatic on-line calibrating device based on large aperture flowmeter

Abstract

The utility model relates to a kind of full-automatic on-line calibrating device based on large-diameter flowmeter, including flow monitoring mechanism, electronic water level gauge and control equipment, electronic water level gauge is used to be fixed on large-diameter flowmeter;Flow monitoring mechanism includes shell, metering component, movable seat, stress plate and movable metal sheet, shell is used to be fixed on large-diameter flowmeter;Metering component is installed in shell, and metering component and electronic water level gauge are respectively connected with control equipment communication;Movable seat is movably installed in shell, and its upper end is fixedly connected with movable metal sheet by swing bar;Stress plate is vertically arranged, and its upper end is fixedly connected with the lower end of movable seat by short shaft, and its lower end is used to extend to large-diameter flowmeter by passing through shell.The utility model has the beneficial effects of simple structure, reasonable design, automatic completion large-diameter flowmeter calibration task, can greatly reduce manual intervention, realize full-automatic calibration work, improve work efficiency and calibration instruction.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter calibration technical field, concretely relates to a full -automatic online calibration device based on large -diameter flowmeter. BACKGROUND

[0002] Large -diameter flowmeter is the equipment for measuring the flow of industrial fluid, usually used in large -diameter pipeline. They are usually used in the application needing large flow range and high precision measurement, such as water supply system, industrial production process, petroleum and natural gas pipeline etc.

[0003] Most of the process switching, flow regulation, calibration operation in the existing large -diameter flowmeter calibration process need to be completed gradually by artificial, especially the flow regulation needs experienced calibrators to adjust the valve control by years of work experience, and there is the problem of high time cost and low controllability of risk, at the same time, the conventional flowmeter used for cooperation calibration is difficult to accurately complete the internal flow measurement under different calibration setting conditions, which brings inconvenience to the subsequent calibration work. UTILITY MODEL CONTENT

[0004] The utility model provides a full -automatic online calibration device based on large -diameter flowmeter, aims at solving the problem in prior art.

[0005] The utility model solves the technical scheme of the above technical problem as follows:

[0006] A full -automatic online calibration device based on large -diameter flowmeter, including flow monitoring mechanism, electronic water level meter and control equipment, the electronic water level meter is used for fixing on large -diameter flowmeter, the flow monitoring mechanism includes the casing, the metering assembly, the movable seat, the stressed plate and the movable metal sheet, the casing is used for fixing on large -diameter flowmeter, the metering assembly is installed in the casing, and the metering assembly and the electronic water level meter are connected with control equipment communication respectively,

[0007] The movable seat is movably installed in the casing, and its upper end is fixedly connected with the movable metal sheet through the swing bar, the stressed plate is vertically arranged, and its upper end is fixedly connected with the lower end of the movable seat through the short shaft, and its lower end is used to extend to large -diameter flowmeter through the casing, when fluid flows in large -diameter flowmeter, the stressed plate is moved to make the stressed plate drive the swing bar to rotate, and the swing bar rotates and drives the movable metal sheet to enter the metering assembly.

[0008] The utility model discloses a beneficial effect is: in the process of verification, utilize electronic water level meter to complete the water level measurement in the inside of large -diameter flowmeter, and transmit data to control equipment, simultaneously, utilize measurement subassembly can calculate the area of movable metal sheet into its inside, thereby obtain the inclination angle of swing pole and stress plate, and according to the water level depth in the current large -diameter flowmeter of electronic water level meter, can obtain the specific flow data of current large -diameter flowmeter after calculation, realize the full -automatic verification of large -diameter flowmeter.

[0009] The utility model discloses simple structure, reasonable in design realizes automatic completion large -diameter flowmeter verification task, can greatly reduce manual intervention, realizes full -automatic verification work, improves work efficiency and verification instruction.

[0010] On the basis of the above technical scheme, the utility model still can make following improvement.

[0011] Further, the measurement subassembly includes a first electromagnetic coil, a second electromagnetic coil and a third electromagnetic coil, the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil are coaxially spaced fixedly installed in the shell, a fixed metal sheet is fixedly installed in the shell corresponding to the part between the first electromagnetic coil and the second electromagnetic coil, and the movable metal sheet is located on one side between the second electromagnetic coil and the third electromagnetic coil.

[0012] The beneficial effect of the above further scheme is that in the process of verification, when the fluid in the large -diameter flowmeter flows, the stress plate will be moved backward, and when the stress plate moves, the swing pole will be rotated, and when the swing pole rotates, the movable metal sheet will enter the middle of the second electromagnetic coil and the third electromagnetic coil, at this time, opposite alternating currents are input into the first electromagnetic coil and the third electromagnetic coil respectively, because the energized coil will generate a magnetic field, when the closed coil magnetic flux in the magnetic field changes, an induced current will be generated.

[0013] When the first electromagnetic coil is input with alternating current, an alternating magnetic field will be generated, which will generate an alternating induced current in the second electromagnetic coil, at this time, the third electromagnetic coil with the same interval is input with alternating current of the same frequency, so that an alternating magnetic field opposite to the first electromagnetic coil is generated, the two alternating magnetic fields offset each other, so that the magnetic flux of the second electromagnetic coil in the magnetic field changes to zero, and the second electromagnetic coil cannot generate an induced current, because the fixed metal sheet exists between the first electromagnetic coil and the second electromagnetic coil, it will have a resistance effect on the magnetic field, so that the magnetic field generated by the third electromagnetic coil will dominate, and the second electromagnetic coil will generate an induced current again.

[0014] When the fluid in the large-diameter flowmeter flows, the force plate and the swing lever are driven to rotate, the swing lever rotates and drives the movable metal sheet to enter between the second electromagnetic coil and the third electromagnetic coil, when the movable metal sheet enters between the second electromagnetic coil and the third electromagnetic coil, the alternating current generated by the alternating magnetic field is weakened, and the area of the movable metal sheet entering and the weakening amount of the alternating current are proportional, the area of the movable metal sheet entering can be calculated through the weakening amount of the alternating current generated by the second electromagnetic coil, so as to obtain the inclination angle of the swing lever and the force plate, and then the specific flow data of the current large-diameter flowmeter can be obtained according to the water level depth of the current large-diameter flowmeter obtained by the electronic water level gauge.

[0015] Further, the distance between the first electromagnetic coil and the second electromagnetic coil is consistent with the distance between the second electromagnetic coil and the third electromagnetic coil.

[0016] The beneficial effect of the above further scheme is that the structure is simple, the design is reasonable, and the quality of the magnetic field is guaranteed to ensure the detection effect.

[0017] Further, the metering assembly further comprises a first mounting frame, a second mounting frame and a third mounting frame, the first mounting frame, the second mounting frame and the third mounting frame are fixedly installed in the housing with a spacing; the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil are fixedly installed on the first mounting frame, the second mounting frame and the third mounting frame respectively.

[0018] The beneficial effect of the above further scheme is that the structure is simple, the design is reasonable, and the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil are fixedly assembled by the first mounting frame, the second mounting frame and the third mounting frame, which is convenient to assemble and ensures that the first electromagnetic coil, the second electromagnetic coil and the third electromagnetic coil are independent of each other and do not affect each other.

[0019] Further, the control device comprises a PLC control system and an upper computer, the PLC control system and the upper computer are communicatively connected; the metering assembly and the electronic water level gauge are communicatively connected with the control device respectively.

[0020] The beneficial effect of the above further scheme is that the structure is simple, the design is reasonable, and the PLC control system and the upper computer are used in cooperation to realize the full-automatic detection of the large-diameter flowmeter, and the detection efficiency is high.

[0021] Further, the PLC control system comprises an instruction receiving module, a data acquisition module and a control adjustment module, the instruction receiving module is used for accepting the calibration instruction set from the host computer, the data acquisition module is used for acquiring the data, field device information and process information in the calibration process, and the control adjustment module comprises a flow adjustment control unit, a temperature adjustment control unit and a pressure adjustment control unit, and is used for controlling the flow, temperature and pressure of the large-diameter flowmeter.

[0022] The beneficial effect of the further scheme is that the structure is simple and reasonable, the related data of the large-diameter flowmeter is acquired and controlled by using the modules in the PLC control system, and the automation degree is high.

[0023] Further, the host computer comprises a data management layer and an operation and maintenance management layer, the data management layer comprises a data receiving module, an instruction parameter setting module and a data fusion module, and the data receiving module is used for receiving the data, field device information and process information data acquired by the PLC control system in the calibration process.

[0024] The beneficial effect of the further scheme is that the structure is simple and reasonable, the data that does not meet the requirements in the received calibration data is screened out, data cleaning is performed, inconsistent data conversion and data granularity conversion are subsequently performed, a mapping table is finally constructed, data fusion is performed, a data model is constructed by using the fused data, a data management middle platform is formed, and the subsequent system and service are called.

[0025] Further, the instruction parameter setting module comprises a flow parameter setting unit, a temperature parameter setting unit and a pressure parameter setting unit, and is used for setting the calibration parameters of the large-diameter flowmeter in the calibration process and switching the calibration process; and the data fusion module comprises a data screening unit, a mapping fusion unit and a PI database, and is used for intelligently screening and fusing the received calibration data and storing the calibration data.

[0026] The beneficial effect of the further scheme is that the structure is simple and reasonable, the parameter setting, data screening fusion and storage are realized by using the units of the instruction parameter setting module.

[0027] Further, the operation and maintenance management layer comprises a device management module, an evaluation module and a visual display module, the device management module comprises a device asset configuration optimization unit, a device running state monitoring unit and a device fault alarm unit, and is respectively used for optimizing the asset configuration of the calibration device, monitoring the state in the device running process and timely alarming in the device fault.

[0028] The beneficial effect of the further scheme is that the data stored in the PI database is used as the support, the grey correlation degree analysis method is used to perform correlation calculation on the data collected by the test and the setting data of the instruction parameter setting module, and the device management module is mainly used for recording and managing device information, including device name, model, specification, installation position, etc., real-time monitoring device state, including running state, fault state, maintenance state, etc., planning and arranging device maintenance, maintenance and repair work, and improving device utilization rate and reliability.

[0029] Further, the evaluation module includes a test result evaluation unit, a reliability evaluation unit and a test efficiency evaluation unit, which are respectively used for evaluation of test result determination, test reliability evaluation and efficiency evaluation of comprehensive test process, and the visualization display module is used for displaying various data in the test process to the outside world.

[0030] The beneficial effect of the further scheme is that the test parameters of the large-diameter flowmeter are set by the instruction parameter setting module of the upper computer, including flow parameters, temperature parameters and pressure parameters, the test parameters are sent to the PLC control system, the test parameters are received by the instruction receiving module, the flow, temperature and pressure of the large-diameter flowmeter are set by the control adjustment module, and then the test process can be performed, the real-time data of the flow monitoring mechanism are collected by the data acquisition module during the test process, and are returned to the upper computer, the data are screened and fused by the data fusion module, and finally the test process is evaluated by the evaluation module. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 It is an assembly drawing during the test of the utility model;

[0032] Fig. 2 It is an internal structure schematic view of the flow monitoring mechanism in the utility model;

[0033] Fig. 3 It is a running principle view of the utility model;

[0034] Fig. 4 It is a principle view of the PLC control system in the utility model.

[0035] In the drawings, the components represented by each reference numeral are listed as follows:

[0036] 1, large-diameter flowmeter; 2, flow monitoring mechanism; 201, shell; 202, first mounting bracket; 203, first electromagnetic coil; 204, second mounting bracket; 205, second electromagnetic coil; 206, third mounting bracket; 207, third electromagnetic coil; 208, fixed metal sheet; 209, movable seat; 210, short shaft; 211, stress plate; 212, swing rod; 213, movable metal sheet; 3, electronic water level gauge. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0038] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0039] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0040] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0041] Embodiment 1

[0042] As Figs. 1 to 4 shown, the embodiment provides a kind of full-automatic on-line calibrating device based on large-diameter flowmeter, including flow monitoring mechanism 2, electronic water level gauge 3 and control equipment, the electronic water level gauge 3 is used to be fixed on large-diameter flowmeter 1;The flow monitoring mechanism 2 includes shell 201, metering assembly, movable seat 209, stress plate 211 and movable metal sheet 213, the shell 201 is used to be fixed on large-diameter flowmeter 1;The metering assembly is installed in the shell 201, and the metering assembly and the electronic water level gauge 3 are respectively connected with the control equipment communication;

[0043] The movable seat 209 is movably arranged in the shell 201, and the upper end thereof is fixedly connected with the movable metal sheet 213 through the swing rod 212; the stress plate 211 is vertically arranged, and the upper end thereof is fixedly connected with the lower end of the movable seat 209 through the short shaft 210, and the lower end thereof is arranged to extend into the large-diameter flowmeter 1 through the shell 201; when the fluid flows in the large-diameter flowmeter 1, the stress plate 211 is driven to move, so that the stress plate 211 drives the swing rod 212 to rotate, and the swing rod 212 rotates and drives the movable metal sheet 213 to enter the metering assembly.

[0044] During the calibration process, the electronic water level meter 3 is used to measure the water level in the large-diameter flowmeter 1, and the data is transmitted to the control device; at the same time, the metering assembly can calculate the area of the movable metal sheet 213 entering the metering assembly, so as to obtain the inclination angle of the swing rod 212 and the stress plate 211, and then according to the water level depth in the large-diameter flowmeter 1 obtained by the electronic water level meter 3, the specific flow data of the large-diameter flowmeter 1 can be obtained after calculation, so that the automatic calibration of the large-diameter flowmeter 1 is realized.

[0045] Preferably, in the embodiment, the stress plate 211 is preferably a long strip-shaped plate structure.

[0046] Preferably, in the embodiment, the swing rod 212 is preferably a bent rod.

[0047] Preferably, in the embodiment, the movable metal sheet 213 is preferably a circular plate structure.

[0048] It should be noted that the electronic water level meter 3 is a prior art, which will not be described here.

[0049] The embodiment has simple structure, reasonable design, and can automatically complete the calibration task of the large-diameter flowmeter, can greatly reduce manual intervention, realize fully automatic calibration work, and improve work efficiency and calibration instruction.

[0050] Embodiment 2

[0051] On the basis of the embodiment 1, in the embodiment, the metering assembly comprises a first electromagnetic coil 203, a second electromagnetic coil 205 and a third electromagnetic coil 207, the first electromagnetic coil 203, the second electromagnetic coil 205 and the third electromagnetic coil 207 are coaxially and fixedly arranged in the shell 201; the fixed metal sheet 208 is fixedly arranged in the shell 201 and corresponds to the position between the first electromagnetic coil 203 and the second electromagnetic coil 205; and the movable metal sheet 213 is located on one side between the second electromagnetic coil 205 and the third electromagnetic coil 207.

[0052] During the detection process, when the fluid in the large-diameter flowmeter 1 flows, the force plate 211 is pushed to move backward, and when the force plate 211 moves, the swing rod 212 is rotated, and when the swing rod 212 rotates, the movable metal sheet 213 enters the middle of the second electromagnetic coil 205 and the third electromagnetic coil 207, at this time, opposite alternating currents are input to the first electromagnetic coil 203 and the third electromagnetic coil 207 respectively, and since the energized coil generates a magnetic field, when the closed coil magnetic flux in the magnetic field changes, an induced current is generated;

[0053] When the first electromagnetic coil 203 is input with an alternating current, an alternating magnetic field is generated, which generates an alternating induced current in the second electromagnetic coil 205, at this time, the third electromagnetic coil 207 with the same frequency is input with an alternating current, so that it generates an alternating magnetic field just opposite to the first electromagnetic coil 203, the two alternating magnetic fields offset each other, so that the magnetic flux of the second electromagnetic coil 205 in the magnetic field changes to zero, and the second electromagnetic coil 205 cannot generate an induced current, and since the fixed metal sheet exists between the first electromagnetic coil 203 and the second electromagnetic coil 205, it has a resistance effect on the magnetic field, so that the magnetic field generated by the third electromagnetic coil 207 prevails, and the second electromagnetic coil 205 generates an induced current again.

[0054] When the fluid in the large-diameter flowmeter 1 flows, the force plate 211 and the swing rod 212 are rotated, and when the swing rod 212 rotates, the movable metal sheet 213 enters between the second electromagnetic coil 205 and the third electromagnetic coil 207, when the movable metal sheet 213 enters between the second electromagnetic coil 205 and the third electromagnetic coil 207, the alternating current generated by the alternating magnetic field is weakened, and the area of the movable metal sheet 213 entering is proportional to the amount of weakening of the alternating current, and the amount of weakening of the alternating current generated by the second electromagnetic coil 205 can be calculated to obtain the area of the movable metal sheet 213 entering, so as to obtain the inclination angle of the swing rod 212 and the force plate 211, and then according to the water level depth of the current large-diameter flowmeter 1 obtained by the electronic water level gauge 3, the specific flow data of the current large-diameter flowmeter 1 can be obtained.

[0055] Embodiment 3

[0056] In this embodiment, the distance between the first electromagnetic coil 203 and the second electromagnetic coil 205 is consistent with the distance between the second electromagnetic coil 205 and the third electromagnetic coil 207.

[0057] The scheme has simple structure and reasonable design, ensures the quality of the generated magnetic field, and ensures the detection effect.

[0058] Embodiment 4

[0059] Based on any one of Embodiments 2 to 3, in this embodiment, the metering component further includes a first mounting bracket 202, a second mounting bracket 204, and a third mounting bracket 206, which are fixedly installed at intervals within the housing 201; the first electromagnetic coil 203, the second electromagnetic coil 205, and the third electromagnetic coil 207 are respectively fixedly installed on the first mounting bracket 202, the second mounting bracket 204, and the third mounting bracket 206.

[0060] The scheme has a simple structure and reasonable design. The first electromagnetic coil 203, the second electromagnetic coil 205 and the third electromagnetic coil 207 are fixedly assembled using the first mounting bracket 202, the second mounting bracket 204 and the third mounting bracket 206 respectively. The assembly is convenient and ensures that the first electromagnetic coil 203, the second electromagnetic coil 205 and the third electromagnetic coil 207 are independent of each other and do not affect each other.

[0061] Example 5

[0062] Based on the above embodiments, in this embodiment, the control device includes a PLC control system and a host computer, and the PLC control system and the host computer are communicatively connected; the metering component and the electronic water level gauge 3 are respectively communicatively connected to the control device.

[0063] The solution has a simple structure and reasonable design. It utilizes a PLC control system and a host computer to achieve fully automatic calibration of large-diameter flow meters with high calibration efficiency.

[0064] Example 6

[0065] Based on Embodiment 5, in this embodiment, the PLC control system includes an instruction receiving module, a data acquisition module, and a control adjustment module. The instruction receiving module is used to receive verification instructions set by the host computer. The data acquisition module is used to collect data, field equipment information, and process information during the verification process. The control adjustment module includes a flow adjustment control unit, a temperature adjustment control unit, and a pressure adjustment control unit, used to control the flow rate, temperature, and pressure of the large-diameter flow meter 1.

[0066] The solution has a simple structure and reasonable design. It utilizes various modules within the PLC control system to acquire and control relevant data from large-diameter flow meters, achieving a high degree of automation.

[0067] Example 7

[0068] In any one of Embodiment 5 to Embodiment 6, the host computer comprises a data management layer and an operation and maintenance management layer, the data management layer comprises a data receiving module, an instruction parameter setting module and a data fusion module, the data receiving module is used for receiving data collected by the PLC control system for the data in the verification process, field device information and process information data.

[0069] The scheme has simple structure and reasonable design, filters out the data that does not meet the requirements in the received verification data, performs data cleaning, then performs inconsistent data conversion and data granularity conversion, finally constructs a mapping table, performs data fusion, constructs a data model by using the fused data, forms a data management middle platform, and is called by subsequent systems and services.

[0070] Embodiment 8

[0071] In any one of Embodiment 7 to Embodiment 8, the instruction parameter setting module comprises a flow parameter setting unit, a temperature parameter setting unit and a pressure parameter setting unit, which are used for setting the verification parameters of the large-diameter flowmeter 1 in the verification process and switching the verification process; and the data fusion module comprises a data filtering unit, a mapping fusion unit and a PI database, which are used for intelligently filtering and storing the received verification data.

[0072] The scheme has simple structure and reasonable design, and each unit of the instruction parameter setting module is used for realizing parameter setting, data filtering and storage.

[0073] Embodiment 9

[0074] In any one of Embodiment 7 to Embodiment 8, the operation and maintenance management layer comprises a device management module, an evaluation module and a visual display module, the device management module comprises a device asset configuration optimization unit, a device running state monitoring unit and a device fault warning unit, which are respectively used for optimizing the asset configuration of the verification device, monitoring the state in the device running process and timely alarming in the device fault state.

[0075] The scheme is supported by the data stored in the PI database, adopts a grey correlation degree analysis method to perform correlation calculation on the collected data and the set data of the instruction parameter setting module, the device management module is mainly used for recording and managing device information, including device name, model, specification, installation position and the like, real-time monitoring device state, including running state, fault state, maintenance state and the like, planning and arranging device maintenance, repair and repair work, and improving device utilization rate and reliability.

[0076] Embodiment 10

[0077] In this embodiment, on the basis of embodiment 9, the evaluation module comprises a verification result evaluation unit, a reliability evaluation unit and a verification efficiency evaluation unit, which are respectively used for evaluation of verification result determination, verification reliability evaluation and efficiency evaluation of comprehensive verification process, and the visualization display module is used for displaying various data in the verification process to the outside world.

[0078] The scheme sets the verification parameters of the large-diameter flowmeter through the instruction parameter setting module of the upper computer, including flow parameters, temperature parameters and pressure parameters, sends the verification parameters to the PLC control system, receives the verification parameters through the instruction receiving module, sets the flow, temperature and pressure of the large-diameter flowmeter through the control adjustment module, and then the verification process can be carried out. The data generated in the verification process is collected by the data acquisition module, and the real-time data of the flow monitoring mechanism is returned to the upper computer, and the data is screened and fused by the data fusion module, and finally the verification process is evaluated by the evaluation module.

[0079] The working principle of the utility model is as follows:

[0080] The switch valve of the large-diameter flowmeter 1 is opened for flow verification, and the electronic water level gauge 3 is used to measure the water level depth in the current large-diameter flowmeter 1 in real time. When the fluid in the large-diameter flowmeter 1 flows, the stressed plate 211 will be moved backward, and when the stressed plate 211 moves, the swing rod 212 will be rotated, and when the swing rod 212 rotates, the movable metal sheet 213 will be moved into the second electromagnetic coil 205 and the third electromagnetic coil 207. At this time, opposite alternating currents are input into the first electromagnetic coil 203 and the third electromagnetic coil 207 respectively. Since the energized coil will generate a magnetic field, when the closed coil magnetic flux in the magnetic field changes, an induced current will be generated.

[0081] When alternating current is input into the first electromagnetic coil 203, an alternating magnetic field will be generated, which will generate an alternating induced current in the second electromagnetic coil 205. At this time, alternating current of the same frequency is input into the third electromagnetic coil 207 with the same interval, so that an alternating magnetic field opposite to the first electromagnetic coil 203 is generated. The two alternating magnetic fields cancel each other out, so that the magnetic flux of the second electromagnetic coil 205 in the magnetic field changes to zero, and the second electromagnetic coil 205 cannot generate an induced current. Since the fixed metal sheet 208 exists between the first electromagnetic coil 203 and the second electromagnetic coil 205, it will have a resistance effect on the magnetic field, so that the magnetic field generated by the third electromagnetic coil 207 will dominate, and the second electromagnetic coil 205 will generate an induced current again.

[0082] When the fluid in the large-diameter flowmeter 1 flows, the force plate 211 and the swing lever 212 are rotated, the swing lever 212 is rotated to drive the movable metal sheet 213 to enter between the second electromagnetic coil 205 and the third electromagnetic coil 207, when the movable metal sheet 213 enters between the second electromagnetic coil 205 and the third electromagnetic coil 207, the alternating current generated by the alternating magnetic field is weakened, and the area of the movable metal sheet 213 entering and the weakening amount of the alternating current are proportional, the area of the movable metal sheet 213 entering can be calculated through the weakening amount of the alternating current generated by the second electromagnetic coil 205, so that the inclination angle of the swing lever 212 and the force plate 211 is obtained, and the specific flow data of the current large-diameter flowmeter 1 can be obtained according to the water level depth of the current large-diameter flowmeter obtained by the electronic water level gauge 3.

[0083] In view of the defects of the prior art, the utility model provides a large-diameter flowmeter full-automatic online calibrating device, solves the problems that the existing large-diameter flowmeter calibration process has high time cost, low risk controllability and conventional flowmeters are difficult to accurately complete internal flow measurement work under different calibration setting conditions.

[0084] The utility model has the following advantages:

[0085] 1, the utility model discloses a PLC control system real -time acquisition on -the -spot calibration process information and calibration data, is completed to on -the -spot calibration process and calibration parameter's automatic switching through host computer setting, realizes automatic completion large -diameter flowmeter calibration task, can greatly reduce manual intervention, realizes full -automatic calibration work, improves work efficiency and calibration instruction.

[0086] 2, the utility model discloses a flow monitoring mechanism can be in the different environmental state of large -diameter flowmeter, real -time accurate internal flow is monitored, compares the data of flow monitoring mechanism acquisition and the data of host computer setting, realizes the flow calibration work of large -diameter flowmeter, better satisfies the calibration demand.

[0087] It should be noted that all electronic components involved in the utility model are of prior art, and the above-mentioned components are electrically connected, and the control circuit between the components is of prior art.

[0088] It is apparent to a person skilled in the art that the present application is not restricted to the details of the foregoing exemplary embodiments, but that the present application can be implemented in other embodiments without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in a descriptive sense only and not for purposes of limitation. The present application is defined by the appended claims rather than by the foregoing description, and all changes and modifications that come within the meaning and range of equivalents of the claims are to be embraced within the scope of the present application. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0089] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic listed in the embodiments. The specification can be referred to for a description of various alternate embodiments. The various embodiments need not necessarily exhibit the same characteristics or the same combination of characteristics. Some embodiments can exhibit more characteristics than others, depending on the practical use of the embodiments, and some characteristics of some embodiments can not be necessary for the practical use of the embodiments. Moreover, it is understood that, although the specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity. A person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

[0090] The preferred embodiments of the present application are described above with the specific details. However, it is to be understood that the above-described embodiments are merely illustrative and not restrictive. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A fully automatic online calibration device based on a large-diameter flow meter, characterized in that: The utility model provides a kind of flow monitoring mechanism (2), electronic water level gauge (3) and control device, the electronic water level gauge (3) is used to be fixed on large-diameter flowmeter (1);The flow monitoring mechanism (2) includes shell (201), metering assembly, movable seat (209), force plate (211) and movable metal sheet (213), the shell (201) is used to be fixed on large-diameter flowmeter (1);The metering assembly is installed in the shell (201), and the metering assembly and the electronic water level gauge (3) are respectively communicated with the control device connection; The movable seat (209) is movably installed in the shell (201), and the upper end is fixedly connected with the movable metal sheet (213) by swing bar (212);The force plate (211) is vertically arranged, and the upper end is fixedly connected with the lower end of the movable seat (209) by short shaft (210), and the lower end is used to extend into large-diameter flowmeter (1) through the shell (201);When fluid flows in large-diameter flowmeter (1), the force plate (211) is moved to make the force plate (211) drive the swing bar (212) to rotate, and the swing bar (212) is rotated and drives the movable metal sheet (213) into the metering assembly.

2. The fully automatic on-line verification device based on large-bore flowmeter according to claim 1, characterized in that: The metering assembly includes first electromagnetic coil (203), second electromagnetic coil (205) and third electromagnetic coil (207), and the first electromagnetic coil (203), the second electromagnetic coil (205) and the third electromagnetic coil (207) are coaxially and fixedly installed in the shell (201) with intervals;The fixed metal sheet (208) is fixedly installed in the shell (201) corresponding to the part between the first electromagnetic coil (203) and the second electromagnetic coil (205);The movable metal sheet (213) is located on one side between the second electromagnetic coil (205) and the third electromagnetic coil (207).

3. The fully automatic on-line verification device based on large-bore flowmeter according to claim 2, characterized in that: The distance between the first electromagnetic coil (203) and the second electromagnetic coil (205) is consistent with the interval between the second electromagnetic coil (205) and the third electromagnetic coil (207).

4. The fully automatic on-line verification device based on large-bore flowmeter according to claim 2, characterized in that: The metering assembly further includes first mounting bracket (202), second mounting bracket (204) and third mounting bracket (206), and the first mounting bracket (202), the second mounting bracket (204) and the third mounting bracket (206) are fixedly installed in the shell (201) with intervals;The first electromagnetic coil (203), the second electromagnetic coil (205) and the third electromagnetic coil (207) are fixedly installed on the first mounting bracket (202), the second mounting bracket (204) and the third mounting bracket (206) respectively.

5. The fully automatic on-line verification device based on large diameter flowmeter according to any one of claims 1-4, characterized in that: The control device includes PLC control system and upper computer, and the PLC control system and the upper computer are communicatedly connected;The metering assembly and the electronic water level gauge (3) are respectively communicated with the control device connection.

6. The fully automatic on-line verification device based on large-bore flowmeter according to claim 5, characterized in that: The PLC control system comprises an instruction receiving module, a data acquisition module and a control adjustment module, the instruction receiving module is used for accepting the calibration instruction set from the host computer, the data acquisition module is used for acquiring the data, field device information and process information in the calibration process, and the control adjustment module comprises a flow adjustment control unit, a temperature adjustment control unit and a pressure adjustment control unit and is used for controlling the flow, temperature and pressure of the large-diameter flowmeter (1).

7. The fully automatic on-line verification device based on large-bore flowmeter according to claim 5, characterized in that: The host computer comprises a data management layer and an operation and maintenance management layer, the data management layer comprises a data receiving module, an instruction parameter setting module and a data fusion module, the data receiving module is used for receiving the data, field device information and process information data acquired by the PLC control system in the calibration process.

8. The fully automatic on-line verification device based on large-bore flowmeter according to claim 7, characterized in that: The instruction parameter setting module comprises a flow parameter setting unit, a temperature parameter setting unit and a pressure parameter setting unit and is used for setting the calibration parameters of the large-diameter flowmeter (1) in the calibration process and switching the calibration process; the data fusion module comprises a data screening unit, a mapping fusion unit and a PI database and is used for intelligently screening, fusing and storing the received calibration data.

9. The fully automatic on-line verification device based on large-bore flowmeter according to claim 7, characterized in that: The operation and maintenance management layer comprises a device management module, an evaluation module and a visual display module, the device management module comprises a device asset configuration optimization unit, a device running state monitoring unit and a device fault warning unit and is respectively used for optimizing the asset configuration of the calibration device, monitoring the state in the device running process and timely alarming in the device fault.

10. The fully automated on-line verification device based on large diameter flow meter as claimed in claim 9 wherein: The evaluation module comprises a calibration result evaluation unit, a reliability evaluation unit and a calibration efficiency evaluation unit and is respectively used for evaluating the calibration result determination, evaluating the calibration reliability and evaluating the efficiency of the comprehensive calibration process, and the visual display module is used for displaying various data in the calibration process to the outside world.

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