CN222069855U - Flowmeter deviation detection device - Google Patents
Flowmeter deviation detection device Download PDFInfo
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- CN222069855U CN222069855U CN202323610605.6U CN202323610605U CN222069855U CN 222069855 U CN222069855 U CN 222069855U CN 202323610605 U CN202323610605 U CN 202323610605U CN 222069855 U CN222069855 U CN 222069855U
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Abstract
本申请提供一种流量计偏差检测装置，涉及流量计技术领域。该流量计偏差检测装置包括：标准流量计，用于检测进入标准流量计的气流的流量值；脉动发生器，用于干扰经标准流量计流出的气流，以形成脉动气流；待测流量计，用于检测脉动气流的流量值；控制中心，分别与标准流量计、脉动发生器和待测流量计电连接；控制中心用于控制进入标准流量计内的气流的流速，以及用于控制脉动发生器形成不同类型的脉动气流，还用于采集标准流量计和待测流量计测得的流量值以计算计量偏差。本申请的流量计偏差检测装置旨在解决不便于到用户现场检测，以致于难以确定气体流量计在真实工况下的计量偏差的问题。
The present application provides a flowmeter deviation detection device, which relates to the technical field of flowmeters. The flowmeter deviation detection device includes: a standard flowmeter, which is used to detect the flow value of the airflow entering the standard flowmeter; a pulsation generator, which is used to interfere with the airflow flowing out of the standard flowmeter to form a pulsating airflow; a flowmeter to be tested, which is used to detect the flow value of the pulsating airflow; a control center, which is electrically connected to the standard flowmeter, the pulsation generator and the flowmeter to be tested respectively; the control center is used to control the flow rate of the airflow entering the standard flowmeter, and to control the pulsation generator to form different types of pulsating airflows, and is also used to collect the flow values measured by the standard flowmeter and the flowmeter to be tested to calculate the metering deviation. The flowmeter deviation detection device of the present application is intended to solve the problem that it is inconvenient to conduct on-site detection at the user's site, so that it is difficult to determine the metering deviation of the gas flowmeter under actual working conditions.
Description
Technical Field
The application relates to the technical field of flowmeters, in particular to a flowmeter deviation detection device.
Background
The gas flowmeter is a meter for measuring gas flow, and is widely used in various fields of metallurgy, electric power, coal, chemical industry, petroleum, traffic, construction, light spinning, food, medicine, agriculture, environmental protection, daily life and the like. A gas flow meter is typically installed in the pipeline to record the amount of gas flowing through.
Taking a gas flowmeter as an example, in the use process, because the gas flow in a gas pipeline is unstable, turbulent pulsating flow exists, the abnormal flow field can be caused, and thus, the inaccurate measurement of the gas flowmeter can be caused, and the measurement dispute can be caused. The existing solution is to check in the user's field to determine the metering deviation.
But is inconvenient to the user for on-site detection, so that the measurement deviation of the gas flowmeter under the real working condition is difficult to determine.
Disclosure of utility model
The application provides a flow meter deviation detection device which is used for solving the problem that the flow meter deviation detection device is inconvenient to detect on site of a user, so that the measurement deviation of a gas flow meter under a real working condition is difficult to determine.
The present application provides a flow meter deviation detecting device, comprising: a standard flow meter for detecting a flow value of an air flow entering the standard flow meter; a pulser in communication with the standard flow meter, the pulser for disrupting the flow of air exiting through the standard flow meter to form a pulsating flow; the flowmeter to be measured is communicated with the pulsation generator and is used for detecting the flow value of the pulsation airflow; the control center is respectively and electrically connected with the standard flowmeter, the pulse generator and the flowmeter to be measured; the control center is used for controlling the flow rate of the air flow entering the standard flowmeter and controlling the running state of the pulsation generator to form different types of pulsation air flows, and the control center is also used for collecting flow values measured by the standard flowmeter and the flowmeter to be measured to calculate metering deviation.
In one possible implementation, the system further comprises an air flow driver for communicating with the standard flow meter, the air flow driver for outputting a steady air flow to the standard flow meter.
In one possible implementation, the pulse generator includes: the shell is provided with a through cylindrical cavity, and the standard flowmeter and the flowmeter to be measured are communicated through the cavity; the valve rod is inserted into the shell, the axis of the valve rod is intersected with the axis of the cavity, and two ends of the valve rod extend out of the shell respectively; the butterfly plate is connected to the valve rod and is positioned in the cavity; the output shaft of the driving motor is connected with one end of the valve rod, and the driving motor is used for driving the valve rod to rotate so as to drive the butterfly plate to overturn, so that interference on air flow in the cavity is realized, and pulsating air flow is formed.
In one possible implementation, the pulse generator further includes: the support is covered at one end of the valve rod, which is close to the driving motor, and the shell and the driving motor are connected to the opposite side of the support; the bottom cover is covered at one end of the valve rod, which is far away from the driving motor, and is connected with the shell, a connecting hole is formed in one end face of the bottom cover, which is close to the shell, and the end part of the valve rod is connected in the connecting hole.
In one possible implementation, a first seal is provided at the edge of the plate face of the butterfly plate, the first seal being configured to separate the chamber into two sections that are not in communication with each other when the butterfly plate is rotated to be coaxial with the chamber, so as to limit communication between the standard flow meter and the flow meter under test.
In one possible implementation, a second sealing element is arranged at a position where one end of the shell, which is away from the bottom cover, is connected with the valve rod; a third sealing piece is arranged between the connecting surface of the shell and the bottom cover.
In one possible implementation, the control center includes: the frequency converter is electrically connected with the airflow driver and is used for controlling the flow speed of the airflow output by the airflow driver; and the controller is electrically connected with the driving motor and is used for controlling the running state of the driving motor to drive the butterfly plate to execute different movement modes so as to form different types of pulsating air flows.
In one possible implementation, the air flow driver is a fan or an air pump.
In one possible implementation, the drive motor is a servo motor.
In one possible embodiment, the end of the valve rod facing away from the drive motor is connected to the housing via a sleeve.
According to the flow meter deviation detection device, air flows sequentially pass through the standard flow meter, the pulse generator and the flow meter to be detected, the flow value of the air flows is detected through the standard flow meter, then the air flows are disturbed through the pulse generator to form pulse air flows, the flow value of the pulse air flows is detected through the flow meter to be detected, and finally the metering deviation of the air flow meter under the disturbance of the pulse flow field is calculated by combining the flow value of the air flows and the flow value of the pulse air flows through the control center. The pulse generator is connected in series between the standard flowmeter and the flowmeter to be measured, so that the metering result of the gas flowmeter before and after the disturbance of the pulse flow field can be intuitively obtained, different pulse airflows can be generated through the pulse generator to simulate the influence of the pulse flow field on the airflows under the real working condition, the test in a factory is convenient, and the problem that the metering deviation of the gas flowmeter under the real working condition is difficult to determine due to the fact that the detection to the user on site is inconvenient can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a flow meter deviation detecting device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a pulsation generator in a flow meter deviation detecting device according to an embodiment of the present application;
Fig. 3 is a cross-sectional view of a pulsation generator in a flow meter deviation detecting device according to an embodiment of the present application.
Reference numerals illustrate:
100-standard flowmeter;
200-a pulse generator;
210-a housing; 211-chamber; 212-a second seal; 213-a third seal;
220-valve stem; 221-shaft sleeve;
230-butterfly plate; 231-a first seal; 232-pressing plates; 233-plate body;
240-driving a motor;
250-bracket;
260-bottom cover; 261-connecting holes;
300-flowmeter to be measured;
400-a control center;
410-a frequency converter;
420-a controller;
500-airflow driver.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the preferred embodiments of the present application will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. Those skilled in the art can adapt it as desired to suit a particular application.
As known in the art, a gas flow meter is a meter that measures the flow of gas and is typically installed in a pipeline to record the amount of gas flowing through. Taking a gas flowmeter as an example, in the use process, because the gas flow in a gas pipeline is unstable, turbulent pulsating flow exists, the abnormal flow field can be caused, and thus, the inaccurate measurement of the gas flowmeter can be caused, and the measurement dispute can be caused. The existing solution is to test at the user site to determine the metering deviation.
However, the above-described method of detecting in the user's site is inconvenient to be performed frequently or for a long time, and thus it is difficult to determine the measurement deviation of the gas flow meter under the actual working condition.
In order to solve the above problems in the prior art, the present application provides a flow meter deviation detecting device, which makes an air flow sequentially pass through a standard flow meter, a pulsation generator and a flow meter to be detected, detects a flow value of the air flow through the standard flow meter, then interferes the air flow through the pulsation generator to form a pulsation air flow, detects the flow value of the pulsation air flow through the flow meter to be detected, and finally calculates a metering deviation of the air flow meter under the interference of a pulsation flow field by combining the flow value of the air flow and the flow value of the pulsation air flow through a control center. The pulse generator is connected in series between the standard flowmeter and the flowmeter to be measured, so that the metering result of the gas flowmeter before and after the disturbance of the pulse flow field can be intuitively obtained, different pulse airflows can be generated through the pulse generator to simulate the influence of the pulse flow field on the airflows under the real working condition, the test in a factory is convenient, and the problem that the metering deviation of the gas flowmeter under the real working condition is difficult to determine due to the fact that the detection to the user on site is inconvenient can be solved.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
A flow meter deviation detecting device provided by an embodiment of the present application will be described in detail with reference to fig. 1 to 3.
Fig. 1 is a schematic structural diagram of a flow meter deviation detecting device according to an embodiment of the present application. Referring to fig. 1, the flow meter deviation detecting device provided by the application includes a standard flow meter 100, a pulsation generator 200, a flow meter 300 to be detected, and a control center 400, where the standard flow meter 100 is used for detecting a flow value Q1 of an air flow entering the standard flow meter 100; the pulsation generator 200 is in communication with the standard flow meter 100, the pulsation generator 200 being configured to disrupt the flow of air exiting the standard flow meter 100 to form a pulsating flow; the flow meter 300 to be measured is communicated with the pulsation generator 200, and the flow meter 300 to be measured is used for detecting the flow value Q2 of the pulsating air flow; the control center 400 is electrically connected with the standard flowmeter 100, the pulsation generator 200 and the flowmeter 300 to be measured respectively; the control center 400 is used for controlling the flow rate of the air flow entering the standard flow meter 100 and for controlling the operation state of the pulsation generator 200 to form different types of pulsating air flows, and the control center 400 is also used for collecting flow values (Q1 and Q2) measured by the standard flow meter 100 and the flow meter 300 to be measured to calculate the metering deviation.
Further, both the standard flow meter 100 and the flow meter 300 to be measured have pressure sensors and temperature sensors.
It will be appreciated that the standard flow meter 100, the pulser 200 and the flow meter 300 to be measured are connected in series such that the air flow passes through the standard flow meter 100, the pulser 200 and the flow meter 300 to be measured in sequence. In this process, the standard flow meter 100 first measures the flow value Q1 of the air flow entering the standard flow meter 100, the pressure sensor of the standard flow meter 100 also detects the pressure value P1 in the standard flow meter 100 at the same time, and the temperature sensor of the standard flow meter 100 also detects the temperature value T1 of the standard flow meter 100 at the same time; the air flow flows out of the standard flowmeter 100 and then reaches the pulse generator 200, the pulse generator 200 interferes the air flow to simulate a complex flow field in a pipeline under the actual condition to form a pulse air flow, then the flow value Q2 of the pulse air flow entering the flowmeter 300 to be measured is measured through the flowmeter 300 to be measured, the pressure sensor of the flowmeter 300 to be measured also detects the pressure value P2 in the flowmeter 300 to be measured, and the temperature sensor of the flowmeter 300 to be measured also detects the temperature value T2 of the flowmeter 300 to be measured; the control center 400 collects flow values (Q1 and Q2), pressure values (P1 and P2) and temperature values (T1 and T2) before and after flow field interference, the control center 400 performs volume conversion through a gaseous equation, flow values Q11 and Q22 in a standard state (20 ℃ and 101.325 kPa) are calculated, and finally the control center 400 subtracts the flow values Q11 and Q22 to obtain the metering deviation of the gas flowmeter under the flow field interference.
Adjusting the flow rate of gas entering the standard flow meter 100 by the control center 400 to simulate the actual flow rate of gas flow in the user field pipe; and the type of the generated pulsating gas flow is adjusted by controlling the running state of the pulsation generator 200 so as to simulate the actual working condition in the user field pipeline, thereby being beneficial to improving the accuracy of measuring deviation detection.
The type of the pulsating gas flow comprises laminar flow, turbulent flow and the like, wherein the laminar flow refers to laminar parallel flow of the gas which has a rule in the flowing direction, and the gas flow usually has a laminar flow state when the flow speed is smaller; turbulence means that the air flow moves forward in the main flow direction, eddies exist in the radial direction of the non-main flow, irregular turbulence movement is integrally shown, and the air flow usually shows a turbulent state when the flow speed is high and the air flow is rubbed by the pipe wall.
Further, in the embodiment of the present application, the air flow driver 500 is further included, where the air flow driver 500 is used to communicate with the standard flow meter 100, and the air flow driver 500 is used to output a stable air flow to the standard flow meter 100.
Wherein the exhaust port of the air flow driver 500 is in communication with the inlet port of the standard flow meter 100 and the air flow driver 500 is electrically connected to the control center 400.
When in use, the air flow driver 500 can output air flow at a specific speed, and under the action of the control center 400, the air flow driver 500 can change the flow rate of the output air flow, so that the flow rate of the air flow entering the standard flowmeter 100 can be adjusted, different flow rates of the air in the pipeline can be conveniently simulated, and the flexibility is high.
FIG. 2 is a schematic diagram of a pulsation generator in a flow meter deviation detecting device according to an embodiment of the present application; fig. 3 is a cross-sectional view of a pulsation generator in a flow meter deviation detecting device according to an embodiment of the present application. As shown in conjunction with fig. 2 and 3, in the embodiment of the present application, the pulsation generator 200 includes a housing 210, a valve stem 220, a butterfly plate 230, and a driving motor 240, the housing 210 having a cylindrical chamber 211 therethrough, and the standard flow meter 100 and the flow meter 300 to be measured being communicated through the chamber 211; the valve rod 220 is inserted on the shell 210, the axis of the valve rod 220 is intersected with the axis of the cavity 211, and two ends of the valve rod 220 extend out of the shell 210 respectively; a butterfly plate 230 is attached to the valve stem 220, the butterfly plate 230 being located within the chamber 211; an output shaft of the driving motor 240 is connected with one end of the valve rod 220, and the driving motor 240 is used for driving the valve rod 220 to rotate so as to drive the butterfly plate 230 to turn over, thereby realizing interference on the air flow in the cavity 211 so as to form pulsating air flow.
Referring to fig. 3, exemplary butterfly plate 230 includes a pressing plate 232 and a plate body 233, wherein a connecting member is disposed at one end surface of pressing plate 232, pressing plate 232 is connected to valve rod 220 via the connecting member, a mounting groove is formed at the other end surface of pressing plate 232, and plate body 233 is coaxially connected in the mounting groove. The connecting piece can be a sleeve connected with the pressing plate 232, the valve rod 220 is arranged in the sleeve in a penetrating mode, and the valve rod 220 and the sleeve are limited through fixing pins.
In use, the drive motor 240 operates with its output shaft driving the valve stem 220 to rotate therewith, and the valve stem 220 drives the butterfly plate 230 to rotate within the chamber 211. When the butterfly plate 230 rotates to be coaxial with the chamber 211, the chamber 211 is blocked, so that air flow cannot flow along the chamber 211; when the butterfly plate 230 rotates to be out of axis with the chamber 211, the chamber 211 is unblocked and air flow can pass through the chamber 211. Under the action of the driving motor 240, the butterfly plate 230 periodically seals and unseals the chamber 211, so that the air flow can form periodic pulsation when flowing through the chamber 211, thereby forming pulsating air flow.
By adjusting the rotation direction and rotation rate of the driving motor 240, the adjustment of the turning direction and turning rate of the butterfly plate 230 can be achieved, so that the butterfly plate 230 executes different operation modes to form different pulsating air flows, thereby forming a complex flow field.
When the butterfly plate 230 is not coaxial with the chamber 211, the shielding effect (i.e. the throttling effect) of the butterfly plate 230 on the chamber 211 in the rotation process also changes periodically, which is specifically expressed as: along with the rotation of the butterfly plate 230, in the process that the axis of the butterfly plate 230 is gradually vertical to the axis of the chamber 211, the shielding effect (i.e. throttling effect) of the butterfly plate 230 on the chamber 211 is gradually reduced until the shielding effect (i.e. throttling effect) of the butterfly plate 230 on the chamber 211 is minimum when the axis of the butterfly plate 230 is vertical to the axis of the chamber 211, and at the moment, the circulation efficiency of the air flow is highest; when the axis of the butterfly plate 230 coincides with the axis of the chamber 211, the butterfly plate 230 has the greatest shielding effect (i.e., a throttling effect) on the chamber 211, and the air flow cannot flow through the chamber 211. Therefore, by utilizing the throttling effect of the butterfly plate 230 on the cavity 211, the dynamic change of the air flow can be realized, and a complex flow field is convenient to build so as to simulate the actual condition in a pipeline on the site of a user.
Further, the butterfly plate 230 may have other shapes or sizes smaller than the normal cross section of the chamber 211, and the butterfly plate 230 may be capable of disturbing the air flow to generate pulsating air flow during operation.
Referring to fig. 3, in the embodiment of the present application, the pulsation generator 200 further includes a bracket 250 and a bottom cover 260, the bracket 250 is covered on one end of the valve rod 220 near the driving motor 240, and the housing 210 and the driving motor 240 are connected on opposite sides of the bracket 250; the bottom cover 260 covers one end of the valve rod 220, which is far away from the driving motor 240, the bottom cover 260 is connected with the shell 210, a connecting hole 261 is formed in one end surface of the bottom cover 260, which is close to the shell 210, and the end part of the valve rod 220 is connected in the connecting hole 261.
Wherein the connection hole 261 is a counter bore, and the diameter of the connection hole 261 is slightly larger than the diameter of the valve rod 220, so that the valve rod 220 can smoothly rotate in the connection hole 261.
It can be appreciated that the bracket 250 is further provided with a yielding hole with a diameter greater than or equal to that of the valve rod 220, and one end of the valve rod 220, which is close to the driving motor 240, is connected with the output shaft of the driving motor 240 through the yielding hole.
Illustratively, the brackets 250 are connected to the housing 210 by bolts and connecting seats of the driving motor 240, respectively; the bottom cover 260 is coupled to the housing 210 by screw or bolt.
In the embodiment of the present application, the edge of the plate surface of the butterfly plate 230 is provided with a first sealing member 231, and the first sealing member 231 is used for separating the cavity 211 into two sections which are not communicated with each other when the butterfly plate 230 rotates to be coaxial with the cavity 211 so as to limit the communication between the standard flowmeter 100 and the flowmeter 300 to be measured.
Illustratively, the first seal 231 may be formed of a flexible silicone or rubber material and disposed annularly around the edge of the platen 232, such that when the butterfly plate 230 is rotated to be coaxial with the chamber 211, the first seal 231 is in sufficient contact with the sidewall of the chamber 211 to provide a seal at the junction of the butterfly plate 230 and the chamber 211.
In the embodiment of the present application, the second sealing member 212 is disposed at a portion where the end of the housing 210 facing away from the bottom cover 260 is connected to the valve stem 220; a third sealing member 213 is provided between the connection surface of the case 210 and the bottom cover 260.
The second sealing member 212 is embedded between the housing 210 and the valve rod 220, and an extending direction of the second sealing member 212 is consistent with an axial direction of the valve rod 220, and one end of the second sealing member 212, which is close to the bracket 250, extends to the outside of the housing 210 and has an extended mounting portion, which is fixed on an end surface of the housing 210, which is close to the bracket 250, by a screw.
It will be appreciated that the second seal 212 is used to seal the connection between the valve stem 220 and the housing 210, and the third seal 213 is used to seal the connection between the bottom cap 260 and the housing 210 to avoid measurement errors caused by gas leakage within the chamber 211.
In the embodiment of the present application, the control center 400 includes a frequency converter 410 and a controller 420, the frequency converter 410 is electrically connected to the airflow driver 500, and the frequency converter 410 is used for controlling the flow rate of the airflow output by the airflow driver 500; the controller 420 is electrically connected to the driving motor 240, and the controller 420 is used for controlling the operation state of the driving motor 240 to drive the butterfly plate 230 to perform different movement modes, thereby forming different types of pulsating gas flows.
It should be noted that, the frequency converter 410 is an electric power control device for performing frequency conversion and speed regulation on fan and pump devices, and the frequency conversion and speed regulation of the devices are generally achieved by changing the frequency of the working power supply of the motor. The application is not limited to the model and specification of the frequency converter 410, and the functions described above can be realized. The operator may set the output frequency of the frequency converter 410 through the control center 400 to control the flow rate of the airflow driver 500.
The controller 420 is, for example, a motor controller for controlling the driving motor 240 to operate in a set direction and speed, thereby changing the operation mode of the pulser 200 to generate different pulsating gas flows. The application does not limit the model and specification of the motor controller, and can realize the functions.
In an embodiment of the present application, the air flow driver 500 is an air blower or an air pump, for example.
It should be noted that, the blower and the air pump can both realize the function of blowing and sucking, wherein the air pump is suitable for the situation of small air flow; the fan is suitable for the situation that the gas flow is large, and in the application, an operator can select proper equipment according to actual requirements.
In an exemplary embodiment of the present application, the driving motor 240 is a servo motor.
The output controlled quantity of the servo motor such as position, azimuth and state can be controlled along with the change of an input target, and the servo motor has high flexibility.
In an embodiment of the present application, the end of the valve stem 220 facing away from the drive motor 240 is coupled to the housing 210 via a bushing 221.
The sleeve 221 is a bush fitted between the valve stem 220 and the housing 210, and functions as a sliding bearing, and is generally made of a material having low hardness and good wear resistance. The valve rod 220 moves relative to the shell 210 when rotating, and the contact part of the valve rod 220 and the shell 210 can be worn due to long-term friction, so that the wear between the valve rod 220 and the shell 210 can be delayed through the shaft sleeve 221, and the service life can be prolonged.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In describing embodiments of the present application, it should be understood that the terms "mounted," "connected," and "coupled" are to be construed broadly, unless otherwise indicated and defined, and may be connected in either a fixed manner, or indirectly, through intermediaries, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present application based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically stated otherwise.
The terms first, second, third, fourth and the like in the description and in the claims and in the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A flow meter deviation detecting device, comprising:
A standard flow meter for detecting a flow value of an air flow entering the standard flow meter;
A pulser in communication with the standard flow meter, the pulser for disrupting the flow of air exiting through the standard flow meter to form a pulsating flow;
The flowmeter to be measured is communicated with the pulsation generator and is used for detecting the flow value of the pulsation airflow;
The control center is respectively and electrically connected with the standard flowmeter, the pulse generator and the flowmeter to be measured; the control center is used for controlling the flow rate of the air flow entering the standard flowmeter and controlling the running state of the pulsation generator to form different types of pulsation air flows, and the control center is also used for collecting flow values measured by the standard flowmeter and the flowmeter to be measured to calculate metering deviation.
2. The flow meter deviation detecting device of claim 1, further comprising an air flow driver for communicating with the standard flow meter, the air flow driver for outputting a steady air flow to the standard flow meter.
3. The flow meter deviation detecting device of claim 2, wherein the pulsation generator includes:
The shell is provided with a through cylindrical cavity, and the standard flowmeter and the flowmeter to be measured are communicated through the cavity;
The valve rod is inserted into the shell, the axis of the valve rod is intersected with the axis of the cavity, and two ends of the valve rod extend out of the shell respectively;
The butterfly plate is connected to the valve rod and is positioned in the cavity;
The output shaft of the driving motor is connected with one end of the valve rod, and the driving motor is used for driving the valve rod to rotate so as to drive the butterfly plate to overturn, so that interference on air flow in the cavity is realized, and pulsating air flow is formed.
4. The flow meter deviation detecting device of claim 3 wherein the pulsation generator further comprises:
the support is covered at one end of the valve rod, which is close to the driving motor, and the shell and the driving motor are connected to the opposite side of the support;
The bottom cover is covered at one end of the valve rod, which is far away from the driving motor, and is connected with the shell, a connecting hole is formed in one end face of the bottom cover, which is close to the shell, and the end part of the valve rod is connected in the connecting hole.
5. The flow meter deviation detecting device of claim 4, wherein a plate face edge of the butterfly plate is provided with a first seal for dividing the chamber into two sections that are not in communication with each other when the butterfly plate is rotated to be coaxial with the chamber to restrict communication of the standard flow meter and the flow meter under test.
6. The flow meter deviation detecting device of claim 5, wherein a second seal is provided at a portion where an end of the housing facing away from the bottom cover is connected to the valve stem; a third sealing piece is arranged between the connecting surface of the shell and the bottom cover.
7. The flow meter deviation detecting device according to any one of claims 3 to 6, wherein the control center includes:
The frequency converter is electrically connected with the airflow driver and is used for controlling the flow speed of the airflow output by the airflow driver;
and the controller is electrically connected with the driving motor and is used for controlling the running state of the driving motor to drive the butterfly plate to execute different movement modes so as to form different types of pulsating air flows.
8. The flow meter deviation detecting device of any of claims 2 to 6, wherein the air flow driver is a blower or an air pump.
9. The flow meter deviation detecting device according to any one of claims 3 to 6, wherein the drive motor is a servo motor.
10. The flow meter deviation detecting device of any of claims 4 to 6, wherein an end of the valve stem facing away from the drive motor is connected to the housing through a sleeve.
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| CN202323610605.6U CN222069855U (en) | 2023-12-28 | 2023-12-28 | Flowmeter deviation detection device |
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| CN202323610605.6U CN222069855U (en) | 2023-12-28 | 2023-12-28 | Flowmeter deviation detection device |
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