Self-adaptive wide-range flowmeter

Abstract

The utility model relates to the technical field of fluid measuring equipment, in particular to a self-adaptive wide-range flowmeter which comprises a straight pipe section, a rotatable rotary throttling plate and a fixed throttling plate are arranged in the straight pipe section, and a plurality of function holes are formed in the rotary throttling plate and the fixed throttling plate respectively. The rotary throttling plate is provided with a driving plate, the driving plate is driven by a power device to rotate so as to drive the rotary throttling plate to rotate, function holes of the rotary throttling plate and the fixed throttling plate are all communicated or partially closed in a staggered mode, and the other parts are kept communicated. And the power device is arranged on the straight pipe section. The flow meter is provided with the fixed plate and the rotating plate, the communicating number of the function holes is adjusted through rotation of the rotating throttling plate according to different flow states, the wide-range and accurate measurement of fluid flow is achieved, and reliable data support is provided for flow monitoring under various complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of fluid measurement equipment technology, specifically an adaptive wide-range flow meter. Background Technology

[0002] Traditional throttling devices, such as standard orifice plate flow meters, have only one throttling orifice, which disrupts the original ideal state of the fluid after throttling. Although multi-orifice balanced flow meters have multiple function orifices to balance and rectify the fluid pattern, making it approximately ideal, they also suffer from a narrow measurement range. Especially for fluid flow rates within a small range, the test error is large, ultimately limiting the measurement accuracy and application range of this type of flow meter. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an adaptive wide-range flow meter that expands the working range through the cooperation of two plates. The technical solution adopted by this invention is as follows:

[0004] An adaptive wide-range flow meter includes a straight pipe section, within which a rotatable rotating flow plate and a fixed flow plate are provided. Each of the rotating and fixed flow plates has several function holes. The rotating flow plate is equipped with a drive plate, which is driven to rotate by a power device, thereby rotating the rotating flow plate and causing all the function holes of the rotating and fixed flow plates to be connected, or partially staggered and closed while remaining connected. The power device is mounted on the straight pipe section.

[0005] The aforementioned adaptive wide-range flow meter has a left annular chamber and a right annular chamber for communication on the straight pipe section. The rotating throttling plate is installed in the left annular chamber, and the fixed throttling plate is installed in the right annular chamber.

[0006] In the aforementioned adaptive wide-range flow meter, both the throttle plate and the drive plate are gear plates, and the two are driven by gear meshing.

[0007] In the aforementioned adaptive wide-range flow meter, the function holes on both the rotating and fixed flow plates are distributed in such a way that a through hole is set at the center and several through holes are distributed in a circle around the through hole. The through hole at the center of both is always connected, and the circumferential through holes can be staggered and closed or connected.

[0008] The beneficial effects of this utility model are as follows: The flow meter is equipped with a fixed plate and a rotating plate. For different flow conditions, the number of connected function holes can be adjusted by rotating the rotating throttle plate to achieve wide range and accurate measurement of fluid flow. It provides reliable data support for flow monitoring under various complex working conditions and can be widely used for flow detection and trade measurement of various fluids such as steam, natural gas, hot water, general gases, and liquids. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0010] Figure 2 This is a diagram showing the fit between the rotating plate and the stationary plate under a large pressure difference in an embodiment of this utility model.

[0011] Figure 3 This diagram illustrates the fit between the rotating plate and the stationary plate under small pressure differences in an embodiment of this utility model.

[0012] In the diagram: 1 is the straight pipe section, 2 is the flange, 3 is the left annular chamber, 4 is the right annular chamber, 5 is the motor assembly, 6 is the three-valve manifold, 7 is the differential pressure transmitter, 8 is the drive plate, 9 is the rotating throttle plate, 10 is the function orifice, and 11 is the fixed throttle plate. Detailed Implementation

[0013] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings. The following embodiments are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should be noted that the terminology used is for describing specific embodiments only and is not intended to limit the scope of this application.

[0014] This embodiment is an adaptive wide-range flow meter, such as Figure 1 As shown, it includes two connected straight pipe sections 1 on the left and right. The left straight pipe section 1 is provided with a left annular chamber 3 for connection, and the right straight pipe section 1 is provided with a right annular chamber 4 for connection. The left annular chamber 3 and the right annular chamber 4 are connected to conventional structures such as a three-valve group 6 and a differential pressure transmitter 7 via pressure taps. The flow meter is equipped with conventional flow totalizer and other equipment to measure the differential pressure at the location and calculate the flow rate.

[0015] Figure 2 This is the view from the left side of the left annular chamber 3, where a throttle plate 9 is rotatably installed. Figure 3 This is a view from the right side of the right annular chamber 4, where a fixed throttling plate 11 is fixedly installed. The rotating throttling plate 9 is equipped with a drive plate 8. Both the rotating throttling plate 9 and the drive plate 8 are gear plates, and they are driven by gear meshing. The drive plate 8 is driven to rotate by a power device to drive the rotating throttling plate 9 to rotate, so that the rotating throttling plate 9 and the function holes 10 of the fixed throttling plate 11 are fully connected or partially staggered and closed, while the other part remains connected. The power device is installed on the straight pipe section 1. In this embodiment, the power device is a motor assembly 5.

[0016] like Figure 2 and Figure 3As shown, the rotating throttle plate 9 and the fixed throttle plate 11 are each provided with several function holes 10. Specifically, the function holes 10 on the rotating throttle plate 9 and the fixed throttle plate 11 are distributed in such a way that a through hole is set at the center, and several through holes are distributed in a circle around the through hole. The through hole at the center of both plates is always connected, while the through holes in the circle can be staggered and closed or connected. Figure 2 The state is fully connected. Figure 3 It is a state where the central through-hole is connected and the circumference through-holes are staggered and closed.

[0017] In this embodiment, Qt is the critical value between large and small flow rates. When the fluid flow rate Qt < Q ≤ Qmax, the flow totalizer receives a pressure difference signal from the differential pressure transmitter 7 that exceeds the critical value. Then, it sends a start signal to the motor assembly 5. The motor assembly 5 rotates the rotating throttle plate 9 by a certain angle to ensure that all the function holes 10 on the rotating throttle plate 9 and the fixed throttle plate 11 are aligned and connected. Then, the motor assembly 5 stops running. At this time, the orifice area of ​​the flow meter is the largest, and the maximum flow rate can be measured. When the fluid flow rate Qmin < Q ≤ Qt, the flow totalizer receives a pressure difference signal from the differential pressure transmitter 7 that is lower than the critical value. Then, the motor assembly 5 receives a signal from the flow totalizer to rotate the rotating throttle plate 9 back to ensure that the function holes 10 on the circumference of the rotating throttle plate 9 and the fixed throttle plate 11 are staggered and closed, and the function holes 10 at the center are connected. Then, the motor assembly 5 stops running. At this time, the orifice area of ​​the flow meter is the smallest, and the minimum flow rate can be measured. The control components such as flow totalizers and differential pressure transmitters, as well as their control principles, can all be achieved using existing technologies, and there are no technical obstacles.

[0018] Features of this flow meter:

[0019] ① Wide range ratio: By adjusting the size and number of function orifices, this flowmeter can measure a minimum of 10 flow units and a maximum of 1000 flow units, that is, the range ratio can reach 1:100. Compared with traditional differential pressure flowmeters, it can adapt to a wider range of flow variation, reduce the need to replace the flowmeter due to large flow fluctuations, and improve measurement efficiency.

[0020] ② High-precision measurement: The measurement range has been increased, which can measure smaller flow rates, ensuring the accuracy of the measurement results and meeting the requirements of industrial applications with high accuracy requirements for flow data.

[0021] ③ Reduced pressure loss: The wide range of the flow meter can adjust the opening and closing state of the function orifice according to the real-time flow, reducing eddy current and turbulent friction, achieving energy saving effect, and ensuring stable fluid flow. This also reduces the requirements for straight pipe section specifications and saves on pipe material costs.

[0022] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various changes or improvements without departing from the principles of this application, and these changes or improvements should also be considered within the scope of protection of this application.

Claims

1. An adaptive wide-range flow meter, comprising a straight pipe section (1), characterized in that: A rotatable throttle plate (9) and a fixed throttle plate (11) are provided in the straight pipe section (1), and the throttle plate (9) and the fixed throttle plate (11) are respectively provided with a number of function holes (10). The rotating throttle plate (9) is equipped with a drive plate (8), which is driven to rotate by a power device to rotate the rotating throttle plate (9), so that the rotating throttle plate (9) and the function holes (10) of the fixed throttle plate (11) are fully connected or partially staggered and closed, while the other part remains connected; the power device is installed on the straight pipe section (1).

2. The adaptive wide-range flow meter according to claim 1, characterized in that: The straight pipe section (1) is provided with a left annular chamber (3) and a right annular chamber (4) for connection. The rotating throttle plate (9) is installed in the left annular chamber (3) and the fixed throttle plate (11) is installed in the right annular chamber (4).

3. The adaptive wide-range flow meter according to claim 1, characterized in that: Both the throttle plate (9) and the drive plate (8) are gear plates, and the two are driven by gear meshing.

4. The adaptive wide-range flow meter according to claim 1, characterized in that: The distribution of the function holes (10) on the rotating throttle plate (9) and the fixed throttle plate (11) is such that a through hole is set at the center and several through holes are distributed in a circle around the through hole. The through holes at the center of the two are always connected, and the circumferential through holes can be staggered and closed or connected.

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