Roots flowmeter acquisition unit and flowmeter error detection device

Abstract

The utility model relates to the technical field of flowmeter detection, in particular to a Roots flowmeter acquisition unit and a flowmeter error detection device, which comprise a mounting piece and an optical fiber sensor, the mounting piece is connected with the roots flowmeter, and a mounting cavity communicated with a fluid inlet or a fluid outlet of the roots flowmeter is formed in the mounting piece; the optical fiber sensor emits light to the side face of the waist wheel through the emitting part of the optical fiber sensor, the emitted light is reflected after encountering the side face of the waist wheel of the waist wheel flowmeter, and the light reflected back from the side face of the waist wheel is received by the receiving part of the optical fiber sensor. Non-contact rotating speed detection is realized by using the optical fiber sensor, so that the problem of mechanical wear can be effectively avoided, the detection precision is improved, and the service life of equipment is prolonged; the optical fiber sensor has good anti-interference performance and can work stably even in the environment with high electromagnetic interference, the accuracy and reliability of signals are guaranteed, the influence of the scheme on the internal structure of the roots flowmeter is small, and installation and production are convenient.

Description

Technical Field

[0001] This utility model relates to the field of flow meter detection technology, and in particular to a rotary flow meter acquisition unit and a flow meter error detection device. Background Technology

[0002] Rotary impeller flow meters are characterized by high accuracy, high reliability, light weight, long lifespan, and convenient installation and use. For example, the rotary impeller flow meter for gas metering disclosed in patent number ZL202211540707.2 involves fluid entering through the inlet and acting on the figure-eight shaped impeller before exiting through the outlet. When using or testing a rotary impeller flow meter, acquiring the rotational speed of the internal impeller is crucial for efficient flow monitoring and error detection. Existing technologies often use mechanical sensors or Hall effect sensors for testing or measurement; however, these methods have certain drawbacks: firstly, mechanical sensors are prone to accuracy degradation due to mechanical wear, and require installation inside the rotary impeller flow meter, making installation complex and potentially interfering with the internal structure; secondly, while Hall effect sensors are non-contact, they are highly sensitive to environmental conditions and susceptible to electromagnetic interference.

[0003] Based on this, the applicant considers designing a non-contact, interference-resistant rotary flow meter acquisition unit and a flow meter error detection device. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a non-contact, interference-resistant rotary flow meter acquisition unit and flow meter error detection device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A rotary flow meter acquisition unit includes a mounting component and an optical fiber sensor;

[0007] The mounting component is connected to the rotary flow meter, and the mounting component is provided with a mounting cavity that communicates with the fluid inlet or fluid outlet of the rotary flow meter;

[0008] The fiber optic sensor is installed inside the mounting cavity. The fiber optic sensor includes a transmitting part and a receiving part facing the wheel of the rotary flowmeter. The transmitting part emits light towards the side of the wheel of the rotary flowmeter. The emitted light is reflected after encountering the side of the wheel of the rotary flowmeter. The receiving part receives the light reflected back from the side of the wheel. When the wheel of the rotary flowmeter rotates, the light intensity reflected to the receiving part of the fiber optic sensor changes periodically. The receiving part of the fiber optic sensor outputs a signal according to the change in light intensity to collect the rotational speed of the rotary flowmeter.

[0009] The working principle and advantages of the rotary flow meter data acquisition unit in this technical solution are as follows:

[0010] In operation, the fiber optic sensor is activated. Since the transmitter and receiver of the fiber optic sensor are installed in a mounting cavity connected to the fluid inlet or outlet of the rotary flowmeter, the sensor emits light towards the side of the rotary wheel. This emitted light is reflected upon encountering the side of the rotary wheel and is received by the receiver. Because the rotary wheel of the flowmeter is figure-eight shaped, the intensity of the reflected light received by the receiver changes periodically as the wheel rotates. This change in intensity is captured, converted into an electrical signal, and output. The rotational speed of the rotary wheel can be calculated using the frequency of the output signal, thus completing the acquisition of the rotary wheel rotational speed information. The use of a fiber optic sensor enables non-contact speed detection, effectively avoiding mechanical wear and improving detection accuracy and equipment lifespan. Furthermore, the fiber optic sensor has excellent anti-interference performance, operating stably even in environments with strong electromagnetic interference, ensuring signal accuracy and reliability. In addition, this solution has minimal impact on the internal structure of the rotary flowmeter, facilitating installation and production.

[0011] Furthermore, it also includes a controller, which is signal-connected to the fiber optic sensor.

[0012] Furthermore, the mounting component includes a mounting cylinder, the interior of which is a mounting cavity, and the controller is mounted on the outer wall of the mounting cylinder.

[0013] Furthermore, a first groove is provided on the outer wall of the mounting cylinder, and the controller is installed in the first groove.

[0014] Furthermore, a second groove is provided on the outer wall of the mounting cylinder, and a power connector is fixedly installed in the second groove. A connecting hole is provided on the mounting cylinder to connect the first groove and the second groove, and the power cord of the controller passes through the connecting hole and is connected to the power connector.

[0015] Furthermore, a third groove is provided on the outer wall of the mounting cylinder, and a sealing perforation communicating with the mounting cavity is provided in the third groove. The controller is provided with a connecting line that passes through the sealing perforation and is connected to the fiber optic sensor.

[0016] Furthermore, a fourth groove is provided on the outer wall of the mounting cylinder, and a connecting screw hole is provided on the fourth groove for threaded connection with the connecting bolt. The fiber optic sensor is fixedly connected to the end of the connecting bolt that passes through the connecting screw hole.

[0017] Furthermore, the outer wall of the mounting cylinder is provided with a sensor connector that communicates with the mounting cavity.

[0018] Furthermore, the sensor connector includes two, and a temperature sensor and a pressure sensor are respectively sealed and installed on the two sensor connectors.

[0019] A flow meter error detection device includes a test pipeline and a test flow meter mounting position, a standard flow meter, a flow regulating valve, and an airflow actuator connected in series on the test pipeline; it also includes a fluid parameter transmitter installed on the test pipeline; the test flow meter mounting position is used to install the test flow meter; the airflow actuator is an air pump or a fan; the upstream section of the test pipeline is an inlet section equipped with an air filter; the downstream section of the test pipeline is an outlet section equipped with the airflow actuator; the test flow meter mounting position, the standard flow meter, and the flow regulating valve are located on the test pipeline between the inlet section and the outlet section; it also includes the aforementioned rotary flow meter acquisition unit, which is installed on the test pipeline. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the rotary flow meter data acquisition unit according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional structural diagram of the rotary flow meter data acquisition unit according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is a three-dimensional structural diagram of the rotary flow meter data acquisition unit according to an embodiment of the present invention. Figure 3 ;

[0023] Figure 4 This is a front view structural diagram of the data acquisition unit of the rotary flow meter according to an embodiment of the present invention;

[0024] Figure 5 This is a front view of the flow meter error detection device and the gas rotary flow meter with signal structure according to an embodiment of the present invention.

[0025] In the above figures: 100, mounting component; 101, mounting cavity; 110, mounting cylinder; 120, connecting flange; 130, first groove; 131, limiting plate; 140, second groove; 141, power connector; 142, connecting hole; 150, third groove; 151, sealing perforation; 160, fourth groove; 161, connecting bolt; 170, sensor connector; 180, sealing ring;

[0026] 200. Fiber optic sensor; 210. Transmitter; 220. Receiver;

[0027] 300. Controller;

[0028] 50. Straight pipes for steady flow;

[0029] 60. Gas rotary flow meter with signal structure. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Refer to together Figures 1 to 4 This embodiment provides a rotary flow meter acquisition unit, which includes a mounting component 100 and an optical fiber sensor 200;

[0032] The mounting component 100 is connected to the rotary flow meter, and the mounting component 100 is provided with a mounting cavity 101 that communicates with the fluid inlet or fluid outlet of the rotary flow meter;

[0033] The fiber optic sensor 200 is installed in the mounting cavity 101. The fiber optic sensor 200 includes a transmitter 210 and a receiver 220 facing the wheel of the rotary flowmeter. The transmitter 210 emits light towards the side of the wheel of the rotary flowmeter. The emitted light is reflected after encountering the side of the wheel of the rotary flowmeter. The receiver 220 receives the light reflected back from the side of the wheel. When the wheel of the rotary flowmeter rotates, the light intensity reflected to the receiver 220 of the fiber optic sensor 200 changes periodically. The receiver 220 of the fiber optic sensor 200 outputs a signal according to the change in light intensity to collect the rotational speed of the rotary flowmeter.

[0034] In this embodiment, during use, the fiber optic sensor 200 is activated. Since the transmitting part 210 and the receiving part 220 of the fiber optic sensor 200 are installed in the mounting cavity 101, which communicates with the fluid inlet or outlet of the rotary flowmeter, the fiber optic sensor 200 emits light towards the side of the rotary wheel through its transmitting part 210. The emitted light is reflected after encountering the side of the rotary wheel of the rotary flowmeter, and the receiving part 220 of the fiber optic sensor 200 receives the light reflected back from the side of the rotary wheel. Because the rotary wheel of the rotary flowmeter is figure-eight shaped, the intensity of the reflected light received by the receiving part 220 of the fiber optic sensor 200 changes periodically as the rotary wheel rotates. The receiver 220 captures the periodic changes in reflected light intensity, converts them into electrical signals, and outputs them. The rotational speed of the rotary wheel can be calculated from the frequency of the output electrical signal, thus completing the acquisition of rotary wheel rotational speed information of the rotary wheel flowmeter. The use of fiber optic sensor 200 realizes non-contact rotational speed detection, which can effectively avoid mechanical wear problems, improve detection accuracy and equipment lifespan. At the same time, fiber optic sensor 200 has good anti-interference performance and can work stably even in environments with strong electromagnetic interference, ensuring the accuracy and reliability of the signal. In addition, this solution has little impact on the internal structure of the rotary wheel flowmeter, making it easy to install and manufacture.

[0035] Preferably, such as Figures 1 to 4 As shown, the rotary flow meter acquisition unit also includes a controller 300, which is connected to the fiber optic sensor 200. The controller 300 can control the fiber optic sensor 200, such as adjusting its on / off state and the emission intensity of the light emitted by the transmitter 210. Simultaneously, the controller 300 can receive the electrical signals output from the receiver 220 of the fiber optic sensor 200 in real time, and perform rapid processing, analysis, and conversion of the signals to further improve their stability and accuracy. Furthermore, the controller 300 has a signal transmission function, which can transmit the processed signals to external devices such as display terminals, data acquisition systems, or host computers in a timely manner, enabling real-time monitoring and recording of the rotary flow meter's rotational speed information, facilitating remote monitoring and data analysis by operators.

[0036] Preferably, such as Figures 1 to 4 As shown, the mounting component 100 includes a mounting cylinder 110, the interior of which is a mounting cavity 101. The controller 300 is mounted on the outer wall of the mounting cylinder 110. The mounting cavity 101 of the mounting cylinder 110 can provide a relatively stable working environment for the fiber optic sensor 200, thereby improving the reliability of speed acquisition. Mounting the controller 300 on the outer wall of the mounting cylinder 110 avoids interference between the controller 300 and the working area of ​​the fiber optic sensor 200, and also facilitates the operation, maintenance and debugging of the controller 300. In addition, mounting the controller 300 on the outer wall of the mounting cylinder 110 facilitates the signal transmission of the controller 300.

[0037] Preferably, such as Figures 1 to 4 As shown, the outer wall of the mounting cylinder 110 is provided with a first groove 130, and the controller 300 is installed in the first groove 130. The first groove 130 provides installation space for the controller 300, making the structure of the entire acquisition unit more compact, saving external space, and making the overall appearance of the acquisition unit neater and more coordinated, and easier to integrate into other devices or systems. Specifically, a limiting plate 131 is fixedly connected to the first groove 130, and the controller 300 is snapped between the limiting plate 131 and the side wall of the first groove 130.

[0038] Preferably, such as Figures 1 to 4 As shown, a second groove 140 is provided on the outer wall of the mounting cylinder 110, and a power connector 141 is fixedly installed in the second groove 140. A connecting hole 142 is provided on the mounting cylinder 110 to connect the first groove 130 and the second groove 140. The power cord of the controller 300 passes through the connecting hole 142 and is connected to the power connector 141. The second groove 140 provides a fixed installation position for the power connector 141, so that the power connector 141 can be firmly installed on the outer wall of the mounting cylinder 110, avoiding poor contact caused by loosening or improper position of the power connector 141 during use, and improving the stability of the power connection. By connecting the power cord of the controller 300 to the power connector 141 through the connecting hole 142, the power cord can be well hidden and protected inside the mounting cylinder 110, which can effectively avoid external impacts that may be suffered due to the power cord being exposed, ensure stable power supply, and enhance the reliability of the entire acquisition unit.

[0039] Preferably, such as Figures 1 to 4 As shown, a third groove 150 is provided on the outer wall of the mounting cylinder 110. A sealing perforation 151 communicating with the mounting cavity 101 is provided in the third groove 150. A connecting wire passing through the sealing perforation 151 and connecting to the fiber optic sensor 200 is provided on the controller 300. The connecting wire passes through the sealing perforation 151 and passes through the mounting cylinder 110, so that the connecting wire can maintain the sealing of the inside of the mounting cylinder 110 when passing through the mounting cylinder 110, preventing harmful substances from the outside from entering the mounting cavity 101 through the introduction point of the connecting wire and affecting the operation of the fiber optic sensor 200 and the rotary flow meter, thus improving the protection performance of the entire acquisition unit. The third groove 150 provides a clear path for the installation and arrangement of the connecting wire, which facilitates the operation during the production and assembly process and improves the installation efficiency.

[0040] Preferably, such as Figures 1 to 4As shown, a fourth groove 160 is provided on the outer wall of the mounting cylinder 110. A connecting screw hole is provided on the fourth groove 160 for threaded connection with the connecting bolt 161. The fiber optic sensor 200 is fixedly connected to the end of the connecting bolt 161 that passes through the connecting screw hole. The inner bottom side of the fourth groove 160 provides a flat mounting surface for the connecting bolt 161. The fiber optic sensor 200 is stably fixed inside the mounting cylinder 110 by the connecting bolt 161. The connection method between the connecting bolt 161 and the connecting screw hole is simple, convenient for installation and disassembly, and facilitates maintenance, replacement or debugging of the fiber optic sensor 200, thereby improving the maintainability of the acquisition unit.

[0041] Specifically, the first groove 130, the second groove 140, the third groove 150 and the fourth groove 160 are formed on the outer wall of the circular mounting cylinder 110 to accommodate its interior, saving external space and making the structure of the acquisition unit more compact and reducing its space occupation.

[0042] Preferably, such as Figures 1 to 4 As shown, a sensor connector 170 communicating with the mounting cavity 101 is provided on the outer wall of the mounting cylinder 110. The sensor connector 170 is used to connect other types of sensors besides the fiber optic sensor 200, which facilitates the monitoring of other data in addition to the acquisition of the rotary wheel speed, providing more comprehensive parameter information on the operating status of the rotary wheel flow meter and helping to more accurately evaluate the working performance of the rotary wheel flow meter. The sensor connector 170 is located on the outer wall of the mounting cylinder 110 and communicates with the mounting cavity 101. Integrating the sensor connector 170 with the mounting cylinder 110 makes the structure of the entire acquisition unit more compact and reasonable, and facilitates installation and maintenance.

[0043] Preferably, such as Figures 1 to 4 As shown, the sensor connector 170 includes two components, with a temperature sensor and a pressure sensor respectively sealed and installed in the two connectors 170. When the temperature sensor and pressure sensor are installed in the sensor connectors 170, the temperature and pressure inside the mounting cylinder 110 can be detected. The temperature and pressure are collected simultaneously with the rotational speed of the rotary wheel. The acquisition of multiple parameters such as temperature, pressure, and rotational speed is integrated into one acquisition unit, which facilitates centralized data management and processing. The sealed installation of the temperature sensor and pressure sensor effectively prevents fluid leakage and external impurities from entering the sensor, ensuring the normal operation and measurement accuracy of the sensor, while also improving the reliability and safety of the entire acquisition unit.

[0044] Specifically, the fiber optic sensor 200 mentioned above can be directly adopted from existing fiber optic sensor 200 technologies.

[0045] Refer to together Figures 1 to 5The flow meter error detection device includes a test pipeline and a test flow meter mounting position, a standard flow meter, a flow regulating valve, and an airflow actuator connected in series on the test pipeline; it also includes a fluid parameter transmitter installed on the test pipeline; the test flow meter mounting position is used to install the test flow meter; the airflow actuator is an air pump or a fan; the upstream section of the test pipeline is an inlet section equipped with an air filter; the downstream section of the test pipeline is an outlet section equipped with an airflow actuator; the test flow meter mounting position, the standard flow meter, and the flow regulating valve are located on the test pipeline between the inlet section and the outlet section; it also includes the aforementioned rotary flow meter acquisition unit, which is installed on the test pipeline.

[0046] The flowmeter error detection device in this solution adopts a flowmeter error detection device disclosed in patent number CN202122677514.9 and the aforementioned rotary flowmeter acquisition unit. The flowmeter error detection device includes a straight pipe 50 for stabilizing the flow and a mounting position for the flowmeter under test. The rotary flowmeter acquisition unit is installed at the end of the straight pipe 50 facing the mounting position of the flowmeter under test. Specifically, a connecting flange 120 is fixedly connected to the mounting cylinder 110. The mounting cylinder 110 is fixedly connected to the straight pipe for stabilizing the flow through the connecting flange 120. A sealing ring 180 is also fixedly connected to the end of the mounting cylinder 110 away from the connecting flange 120. During testing, the end of the mounting cylinder 110 connected to the sealing ring 180 abuts against the side wall of the rotary flowmeter. With the help of the high-precision flow reference provided by the standard flowmeter, combined with the precise acquisition of parameters such as rotation speed, temperature, and pressure by the rotary flowmeter acquisition unit, the error of the rotary flowmeter under test can be comprehensively and accurately evaluated, achieving high-precision flowmeter error detection.

[0047] More specifically, the flow meter under test adopts a gas rotary flow meter 60 with a signal structure, as disclosed in patent number CN202420698440.8. It can accurately monitor the change of gas flow rate by acquiring and changing high-frequency signals. When used in conjunction with the above-mentioned flow meter error detection device and its rotary flow meter acquisition unit, the error of the rotary flow meter under test can be evaluated more comprehensively and accurately, and high-precision flow meter error detection can be achieved.

[0048] Of course, the above-mentioned rotary flow meter acquisition unit can be used independently. The mounting cylinder 110 can be directly fixed to the outer shell of the rotary flow meter. The end of the mounting cylinder 110 connected to the connecting flange 120 can be directly closed or equipped with an opening and closing cover.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary flow meter data acquisition unit, characterized in that, Includes mounting components and fiber optic sensors; The mounting component is connected to the rotary flow meter, and the mounting component is provided with a mounting cavity that communicates with the fluid inlet or fluid outlet of the rotary flow meter; The fiber optic sensor is installed inside the mounting cavity. The fiber optic sensor includes a transmitting part and a receiving part facing the wheel of the rotary flowmeter. The transmitting part emits light towards the side of the wheel of the rotary flowmeter. The emitted light is reflected after encountering the side of the wheel of the rotary flowmeter. The receiving part receives the light reflected back from the side of the wheel. When the wheel of the rotary flowmeter rotates, the light intensity reflected to the receiving part of the fiber optic sensor changes periodically. The receiving part of the fiber optic sensor converts the light intensity change into an output signal to collect the rotational speed of the rotary flowmeter.

2. The rotary flow meter data acquisition unit as described in claim 1, characterized in that, It also includes a controller, which is connected to the fiber optic sensor signal.

3. The rotary flow meter data acquisition unit as described in claim 2, characterized in that, The mounting component includes a mounting cylinder, the interior of which is a mounting cavity, and the controller is mounted on the outer wall of the mounting cylinder.

4. The rotary flow meter data acquisition unit as described in claim 3, characterized in that, The outer wall of the mounting cylinder is provided with a first groove, and the controller is installed in the first groove.

5. The rotary flow meter acquisition unit as described in claim 4, characterized in that, The outer wall of the mounting cylinder is provided with a second groove, and a power connector is fixedly installed in the second groove. The mounting cylinder is provided with a connecting hole that connects the first groove and the second groove. The power cord of the controller passes through the connecting hole and is connected to the power connector.

6. The rotary flow meter acquisition unit as described in claim 4, characterized in that, The outer wall of the mounting cylinder is provided with a third groove, and a sealing perforation communicating with the mounting cavity is provided in the third groove. The controller is provided with a connecting line that passes through the sealing perforation and is connected to the fiber optic sensor.

7. The rotary flow meter data acquisition unit as described in claim 3, characterized in that, The outer wall of the mounting cylinder has a fourth groove, and the fourth groove has a connecting screw hole for threaded connection with the connecting bolt. The fiber optic sensor is fixedly connected to the end of the connecting bolt that passes through the connecting screw hole.

8. The rotary flow meter acquisition unit as described in claim 3, characterized in that, The outer wall of the mounting cylinder is provided with a sensor connector that communicates with the mounting cavity.

9. The rotary flow meter acquisition unit as described in claim 8, characterized in that, The sensor connector includes two components, and a temperature sensor and a pressure sensor are respectively sealed and installed on the two sensor connectors.

10. A flow meter error detection device, comprising a test pipeline and a test flow meter mounting position, a standard flow meter, a flow regulating valve, and an airflow actuator connected in series on the test pipeline; further comprising a fluid parameter transmitter installed on the test pipeline; the test flow meter mounting position is used to install the test flow meter; the airflow actuator is an air pump or a fan; the upstream section of the test pipeline is an inlet section equipped with an air filter; the downstream section of the test pipeline is an outlet section equipped with the airflow actuator; the test flow meter mounting position, the standard flow meter, and the flow regulating valve are arranged on the test pipeline between the inlet section and the outlet section; characterized in that, It also includes the rotary flow meter acquisition unit as described in any one of claims 1 to 8, wherein the rotary flow meter acquisition unit is installed on the test pipeline.

Images