Online flow measurement calibration device

Abstract

The utility model discloses an on-line flow measuring and calibrating device which comprises a first arc-shaped pipe, a second arc-shaped pipe, a correcting glass pipe, a correcting impact block and a correcting control box, an electronic flow measuring instrument is arranged on a main pipeline where gas flows, and the first arc-shaped pipe and the second arc-shaped pipe are symmetrically installed on the main pipeline. Two opposite ports of the first arc-shaped pipe and the second arc-shaped pipe are sleeved with the two ends of the correction glass pipe respectively, a correction impact block is plugged in the correction glass pipe, two pressure sensing blocks are symmetrically arranged on the inner wall, close to the tail end, of the correction glass pipe, a magnet piece is arranged in the correction impact block, and the pressure sensing blocks are arranged in the correction impact block. A first electromagnetic coil and a second electromagnetic coil facing two ports of the correction glass tube are arranged on the outer wall of the first arc-shaped tube and the outer wall of the second arc-shaped tube respectively, and a correction control box is installed on the outer wall of the correction glass tube and connected with the internet network. The device can carry out on-line remote correction, and is high in correction precision and high in correction speed.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration of gas flow measurement instruments, in particular to an on-line flow measurement calibration device. Background Art

[0002] Gas flow meters are provided on many gas pipelines, including electronic flow meters and non-electronic flow meters. For electronic flow meters, the gas flow can be viewed remotely, but the accuracy of electronic flow meters will decrease after being used for a period of time. Regular calibration is required for all types of gas flow meters. The calibration of electronic gas flow meters generally adopts calibration after disassembly or on-site comparison calibration with other instruments. Both calibrations waste time, have a long calibration time, are troublesome to calibrate, and cannot complete remote calibration without being on-site. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this reason, an object of the utility model is to provide an on-line flow measurement calibration device, which solves the problems that the electronic flow meter of gas cannot be remotely calibrated and the calibration is troublesome.

[0004] An on-line flow measurement calibration device according to the utility model includes a first arc tube, a second arc tube, a calibration glass tube, a calibration impact block and a calibration control box. An electronic flow meter is provided on the main pipeline where the gas flows. The first arc tube and the second arc tube are symmetrically installed on the main pipeline. The two ends of the calibration glass tube are respectively sleeved on the two opposite ports of the first arc tube and the second arc tube. A first solenoid valve and a second solenoid valve are respectively arranged in the first arc tube and the second arc tube. A third solenoid valve is arranged in the main pipeline between the first arc tube and the second arc tube. A calibration impact block is plugged in the calibration glass tube. Two pressure sensing blocks are symmetrically arranged on the inner wall of the calibration glass tube near the tail end. A magnet sheet is arranged in the calibration impact block. First electromagnetic coils and second electromagnetic coils facing the two ports of the calibration glass tube are respectively arranged on the outer walls of the first arc tube and the second arc tube. A calibration control box is installed on the outer wall of the calibration glass tube. The calibration control box is electrically connected to the electronic flow meter, the first solenoid valve, the second solenoid valve, the third solenoid valve and the pressure sensing block. The calibration control box is connected to the Internet network.

[0005] In some embodiments of the utility model, the calibration impact block is a cylindrical plastic block, and the tail end of the calibration impact block is provided with an inward concave arc-shaped groove, and the front end is provided with a convex head.

[0006] In some other embodiments of the utility model, the inner diameter of the calibration glass tube is 1-3 mm larger than the outer diameter of the calibration impact block.

[0007] In some other embodiments of the present utility model, the calibration glass tube is parallel to the main pipeline, and the angle between the calibration glass tube and the horizontal plane is less than 5°, and the front end of the calibration glass tube is not higher than the tail end.

[0008] In some other embodiments of the present utility model, the inner diameter of the first arc-shaped tube is 1.1 - 1.2 times that of the main pipeline.

[0009] In some other embodiments of the present utility model, a plug with a smaller outer diameter is provided at the position of the opposite ports of the first arc-shaped tube and the second arc-shaped tube, and both ends of the calibration glass tube are sleeved on the plug, and a rubber ring is sleeved on the plug.

[0010] In the present utility model, a remote control calibration control box is used to control the operation of the three solenoid valves. When the accurate value of the gas flow rate needs to be measured, while closing the third solenoid valve, the first solenoid valve and the second solenoid valve will be opened simultaneously, and the gas will rush into the calibration glass tube. Due to the gas flow, the calibration impact block will be driven to move and rush towards the pressure sensing block. The time from starting to close the third solenoid valve to hitting the pressure sensing block is the air flow rate calibration time, which is used to evaluate the air flow rate. The average value calculated through multiple corresponding operations, and then the calibration electronic flow meter is controlled through the calibration control box, which can be calibrated remotely online, with high calibration accuracy and fast calibration speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0012] Figure 1 is a schematic cross-sectional structure diagram of an on-line flow measurement and calibration device proposed by the present utility model.

[0013] Figure 2 is a schematic three-dimensional structure diagram of the positions of the first arc-shaped tube, the second arc-shaped tube and the calibration glass tube proposed by the present utility model.

[0014] Figure 3 is a schematic structure diagram of the calibration impact block proposed by the present utility model.

[0015] In the figure: 1, main pipeline; 2, third solenoid valve; 3, first arc-shaped tube; 30, plug; 301, rubber ring; 31, first solenoid valve; 32, first electromagnetic wire; 4, second arc-shaped tube; 41, second solenoid valve; 42, second electromagnetic coil; 5, calibration glass tube; 51, pressure sensing block; 6, calibration impact block; 61, convex head; 62, arc-shaped groove; 63, magnet sheet; 7, calibration control box; 8, electronic flow meter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0017] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0018] Referring to Figures 1-3 , an on-line flow measurement calibration device, comprising a first arc tube 3, a second arc tube 4, a calibration glass tube 5, a calibration impact block 6 and a calibration control box 7. An electronic flow meter 8 is provided on the main pipeline 1 where the gas flows. The first arc tube 3 and the second arc tube 4 are symmetrically installed on the main pipeline 1. Both ends of the calibration glass tube 5 are respectively sleeved on two opposite ports of the first arc tube 3 and the second arc tube 4. A first solenoid valve 31 and a second solenoid valve 41 are respectively arranged in the first arc tube 3 and the second arc tube 4. A third solenoid valve 2 is arranged in the main pipeline 1 between the first arc tube 3 and the second arc tube 4. A calibration impact block 6 is inserted into the calibration glass tube 5. Two pressure sensing blocks 51 are symmetrically arranged on the inner wall of the calibration glass tube 5 near the tail end. A magnet sheet 63 is arranged in the calibration impact block 6. First electromagnetic coils 32 and second electromagnetic coils 42 facing the two ports of the calibration glass tube 5 are respectively arranged on the outer walls of the first arc tube 3 and the second arc tube 4. A calibration control box 7 is installed on the outer wall of the calibration glass tube 5. The calibration control box 7 is electrically connected to the electronic flow meter 8, the first solenoid valve 31, the second solenoid valve 41, the third solenoid valve 2 and the pressure sensing block 51. The calibration control box 7 is connected to the Internet network.

[0019] During calibration, remotely control the calibration control box. While controlling the third solenoid valve to close, the first solenoid valve and the second solenoid valve will be opened simultaneously. The gas will rush into the calibration glass tube. Due to the gas flow, the calibration impact block will be driven to move and rush towards the pressure sensing block (since the friction between the calibration impact block and the inner wall of the calibration glass tube is very small and the friction effect is very small, the impact time is stored in the calibration control box to measure the gas flow velocity data for comparison to calibrate the electronic flow meter 8). The time from starting to close the third solenoid valve to hitting the pressure sensing block is the air flow velocity calibration time T, which is used to judge the air flow velocity. The average value calculated through multiple corresponding operations is then used to control and calibrate the electronic flow meter by the calibration control box, enabling on-line remote calibration with high calibration accuracy and fast calibration speed. According to the gas flow velocity measured through calibration and the electronic flow meter 8, the electronic flow meter 8 is calibrated according to the error coefficient to achieve the calibration purpose.

[0020] After the calibration measurement is completed, while closing the first solenoid valve 31 and the second solenoid valve 41, the third solenoid valve 2 is opened to continue the gas flow. At this time, by starting the first electromagnetic coil 31 and the second electromagnetic coil 42, the first electromagnetic coil 31 attracts the magnet piece 63, while the second electromagnetic coil 42 repels the magnet piece 63, so as to push the magnet piece 63 to the position at the head end of the calibration glass tube 5 to contact the first arc tube 3 and wait for the next impact. The first arc tube 3 and the second arc tube 4 are pipes that do not affect the electromagnetic effect sent by the electromagnetic coil. Before the first impact, the position of the calibration impact block 6 needs to be calibrated with the battery coil to prevent it from not being in the initial position.

[0021] The calibration impact block 6 is a cylindrical plastic block, and the tail end of the calibration impact block 6 is provided with an inwardly concave arc-shaped groove 62, and the front end is provided with a boss head 61. The inwardly concave arc-shaped groove 62 is convenient for gas accumulation and impact, and the boss head 61 can squeeze the inner side of the pressure sensing block 51. The pressure sensing block 51 is a commercially purchased pressure sensing sheet and has a certain thickness. When the pressure is sensed, the signal is conducted to the controller in the calibration control box to determine the impact time.

[0022] The inner diameter of the calibration glass tube 5 is 1-3 mm larger than the outer diameter of the calibration impact block 6. A smaller gap is left for easy impact sliding.

[0023] The calibration glass tube 5 is parallel to the main pipeline 1 and the included angle between the calibration glass tube 5 and the horizontal plane is less than 5°, and the front end of the calibration glass tube 5 is not higher than the tail end. To prevent the calibration impact block 6 from not being at the head end position during impact.

[0024] The inner diameter of the first arc tube 3 is 1.1-1.2 times the inner diameter of the main pipeline 1. This can ensure that when the gas enters the first arc tube 3, the resistance is small and it is convenient for the gas to flow in.

[0025] At the port position where the first arc tube 3 and the second arc tube 4 face each other, a plug 30 with a smaller outer diameter is provided. Both ends of the calibration glass tube 5 are sleeved on the plug 30, and a rubber ring 301 is sleeved on the plug 30. The socket is convenient for disassembly and has good sealing performance.

[0026] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An online flow measurement calibration device, characterized in that: The invention comprises a first arc-shaped tube (3), a second arc-shaped tube (4), a calibration glass tube (5), a calibration impact block (6) and a calibration control box (7); an electronic flow meter (8) is provided on a main pipeline (1) for gas flow; the first arc-shaped tube (3) and the second arc-shaped tube (4) are symmetrically mounted on the main pipeline (1); two ends of the calibration glass tube (5) are respectively sleeved on two opposite ports of the first arc-shaped tube (3) and the second arc-shaped tube (4); a first solenoid valve (31) and a second solenoid valve (41) are respectively provided in the first arc-shaped tube (3) and the second arc-shaped tube (4); a third solenoid valve (2) is provided in the main pipeline (1) between the first arc-shaped tube (3) and the second arc-shaped tube (4); the calibration glass tube (5) is provided with a plurality of valves; and the calibration glass tube (5) is provided with a plurality of valves. A correction impact block (6) is inserted inside, two pressure sensing blocks (51) are symmetrically arranged on the inner wall of the correction glass tube (5) near the tail end, a magnet sheet (63) is arranged inside the correction impact block (6), a first electromagnetic coil (32) and a second electromagnetic coil (42) facing two ports of the correction glass tube (5) are arranged on the outer walls of the first arc tube (3) and the second arc tube (4), respectively, a correction control box (7) is installed on the outer wall of the correction glass tube (5), the correction control box (7) is electrically connected to the electronic flow meter (8), the first electromagnetic valve (31), the second electromagnetic valve (41), the third electromagnetic valve (2) and the pressure sensing block (51), and the correction control box (7) is connected to the Internet network.

2. An online flow measurement calibration device according to claim 1, characterized in that: The correction impact block (6) is a cylindrical plastic block, the tail end of the correction impact block (6) is provided with an inwardly concave arc groove (62), and the front end is provided with a boss head (61).

3. An online flow measurement calibration device according to claim 2, characterized in that: The inner diameter of the calibration glass tube (5) is 1-3 mm larger than the outer diameter of the calibration impact block (6).

4. The online flow measurement calibration device according to claim 1, characterized in that: The correction glass tube (5) is parallel to the main pipe (1), and the angle between the correction glass tube (5) and the horizontal plane is less than 5°, and the front end of the correction glass tube (5) is not higher than the rear end.

5. The online flow measurement calibration device according to claim 1, characterized in that: The inner diameter of the first arc-shaped pipe (3) is 1.1-1.2 times the inner diameter of the main pipe (1).

6. The online flow measurement calibration device according to claim 1, characterized in that: A plug (30) with a reduced outer diameter is provided at the port position where the first arc tube (3) and the second arc tube (4) are opposite to each other, and both ends of the correction glass tube (5) are sleeved on the plug (30), and a rubber ring (301) is sleeved on the plug (30).

Images