Gas ultrasonic flow sensor structure capable of realizing multi-point measurement and method

Abstract

The invention relates to a gas ultrasonic flow sensor structure capable of realizing multi-point measurement and a method, and belongs to the technical field of gas flow sensors. According to the technical scheme, probes are arranged on a head probe fixing seat, a middle probe fixing seat and a tail probe fixing seat, the adjacent probes are matched in pairs to form a measurement sound path, the distance between the matched probes in pairs is a sound path distance L, and the multiple pairs of probes in the length direction of a probe body shell form the gas ultrasonic flow sensor for multi-point measurement. The gas ultrasonic flow sensor has the beneficial effects that the gas flow of the large-diameter pipeline is measured by adopting the gas ultrasonic flow sensor capable of realizing multi-point measurement, the measurement precision is high, and the problem of measurement misalignment caused by irregular flow state when the gas flow of the large-diameter pipeline is measured in the prior art is effectively solved. In addition, the ultrasonic sensor with the multi-point measurement function is supported by the head probe fixing seat and the tail probe fixing seat, so that vibration of the sensor caused by high wind speed in a pipeline can be reduced to the greatest extent, and the metering stability and accuracy are improved.

Description

Technical Field

[0001] The invention relates to a gas ultrasonic flow sensor structure and method capable of multi-point measurement, belonging to the technical field of gas flow sensors. Background Art

[0002] Gas ultrasonic flow sensor (flow meter) is an instrument used to measure gas flow. It uses the sound velocity difference principle of ultrasonic propagation to calculate the gas velocity and flow rate by measuring the sound velocity difference of ultrasonic airflow in the forward and reverse directions. At present, when measuring the gas flow of a larger pipe diameter (pipe diameter greater than 600mm), a single-piece insertion measurement structure is generally used to perform single-point measurement in the pipeline. The sensor measurement sound path is generally 160-270mm, and the center of the sound path is located at d / 4 from the inner wall of the pipe. This method can achieve a measurement accuracy of 1.5% when the gas flow state in the on-site pipeline is good. However, the gas flow rate in the on-site pipeline is generally high, the flow state is irregular turbulence, and even vortices may be generated. The single-point measurement of existing technologies will lead to inaccurate measurements. Summary of the invention

[0003] The purpose of the present invention is to provide a gas ultrasonic flow sensor structure and method capable of multi-point measurement. An ultrasonic sensor with a multi-point measurement function is used to simultaneously measure and calculate the gas flow in the pipeline at multiple points in the pipeline. The sensor sound path can be adjusted according to the pipe diameter. The gas ultrasonic flow sensor capable of multi-point measurement is used to measure the gas flow in a large-diameter pipeline with high measurement accuracy, thereby solving the above-mentioned technical problems existing in the prior art.

[0004] The technical solution of the present invention is: A gas ultrasonic flow sensor structure capable of multi-point measurement comprises a probe body and a probe body connecting rod, wherein the probe body is arranged at the front end of the probe body connecting rod; the probe body comprises a probe body shell, a head probe fixing seat, a probe, a middle probe fixing seat and a tail probe fixing seat, wherein the head probe fixing seat, the middle probe fixing seat and the tail probe fixing seat are arranged in sequence in the length direction of the probe body shell, the number of probes is multiple, and the head probe fixing seat, the middle probe fixing seat and the tail probe fixing seat are all provided with probes, adjacent probes are matched in pairs to form a measurement sound path, the distance between the matched paired probes is a sound path L, and multiple pairs of probes along the length direction of the probe body shell constitute a gas ultrasonic flow sensor capable of multi-point measurement.

[0005] The number of the intermediate probe fixing seats is more than one, and probes are arranged on both sides of the intermediate probe fixing seat, and the probes on both sides are matched with other adjacent probes in pairs.

[0006] There are two intermediate probe fixing seats, and probes are arranged on both sides of the two intermediate probe fixing seats. The probe on the front probe fixing seat is matched with the probe on one side of the first intermediate probe fixing seat in pair to form a first measuring point; the probe on the other side of the first intermediate probe fixing seat is matched with the probe on one side of the second intermediate probe fixing seat in pair to form a second measuring point; the probe on the other side of the second intermediate probe fixing seat is matched with the probe on the rear probe fixing seat in pair to form a third measuring point, and the whole constitutes a gas ultrasonic flow sensor with three-point measurement.

[0007] The three-point measurement gas ultrasonic flow sensor is inserted obliquely into a pipeline, the inner diameter of the pipeline is d, the second measuring point in the middle is located at the center of the pipeline, the first measuring point and the third measuring point are respectively located at a distance d / 4 from the inner walls on both sides of the pipeline, and the three points simultaneously measure and calculate the gas flow in the pipeline.

[0008] The head probe fixing seat, the middle probe fixing seat and the tail probe fixing seat are welded on the inner wall of the probe body shell, and the probes are fixed on the head probe fixing seat, the middle probe fixing seat and the tail probe fixing seat respectively.

[0009] A threading tube is arranged between the probes, the threading tube is welded on the inner wall of the probe body shell, and the probe signal line of each probe is led out from the threading tube.

[0010] The acoustic path L of the gas ultrasonic flow sensor at each measuring point is the same. The probe body shell is made of stainless steel seamless steel pipe, and the sensor acoustic path is determined according to the different pipe diameters to be measured on site.

[0011] The probe body connecting rod is fastened to the probe body as a whole through threads.

[0012] The multi-point measurement gas ultrasonic flow sensor is inserted into a pipeline, a base is welded on the outer wall of one side of the pipeline, a mounting hole is provided at a position corresponding to the base on the other side of the pipeline, and a tail base is welded on the outer wall of the pipeline outside the mounting hole; a hole is opened in the base and a ball valve and a sealing nipple are installed in sequence, a probe body and a probe body connecting rod are inserted into the pipeline through the sealing nipple, the ball valve and the base, and the end of the probe body is inserted into the mounting hole and the tail base.

[0013] The tail base is provided with an observation hole for easy observation and guiding the probe body to be accurately inserted into the tail base. The tail base is provided with a tail sealing cover, and the observation hole is closed by tightening the tail sealing cover.

[0014] An O-type sealing ring, a conical sealing gasket and a locking nut are arranged between the sealing nipple and the probe body connecting rod to achieve sealing with the probe body connecting rod.

[0015] A flow measurement method for the above-mentioned gas ultrasonic flow sensor structure capable of multi-point measurement, which determines the sound path L of the gas ultrasonic flow sensor for multi-point measurement according to the inner diameter d of the pipeline to be measured and the number of measurement points of the gas ultrasonic flow sensor for multi-point measurement; the gas ultrasonic flow sensor for multi-point measurement is installed in the pipeline by insertion (mature existing technology); the gas ultrasonic flow sensor for multi-point measurement simultaneously measures and calculates the gas flow in the pipeline at multiple points in the pipeline.

[0016] The beneficial effects of the present invention are as follows: the gas ultrasonic flow sensor capable of multi-point measurement is used to measure the gas flow in a large-diameter pipeline, and the measurement points are increased from one point in the prior art to multiple points, with high measurement accuracy, which effectively solves the problem of measurement inaccuracy caused by irregular flow patterns when measuring the gas flow in a large-diameter pipeline in the prior art. In addition, the multi-point measurement function ultrasonic sensor can minimize the jitter of the sensor caused by the high wind speed in the pipeline through the support of the head probe fixing seat and the tail probe fixing seat, thereby improving the measurement stability and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an ultrasonic flow sensor according to an embodiment of the present invention; In the figure: pipeline 1, base 2, ball valve 3, probe body connecting rod 4, sealing short section 5, O-ring 6, conical sealing gasket 7, locking nut 8, probe body 9, tail base 10, tail sealing cover 11, probe body shell 12, head probe fixing seat 13, probe 14, middle probe fixing seat 15, threading tube 16, probe signal line 17, tail probe fixing seat 18, mounting hole 19. DETAILED DESCRIPTION

[0018] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0019] A gas ultrasonic flow sensor structure capable of multi-point measurement comprises a probe body 9 and a probe body connecting rod 4, wherein the probe body 9 is arranged at the front end of the probe body connecting rod 4; the probe body 9 comprises a probe body shell 12, a head probe fixing seat 13, a probe 14, a middle probe fixing seat 15 and a tail probe fixing seat 18, wherein the head probe fixing seat 13, the middle probe fixing seat 15 and the tail probe fixing seat 18 are sequentially arranged in the length direction of the probe body shell 12, the number of the probes 14 is multiple, and the head probe fixing seat 13, the middle probe fixing seat 15 and the tail probe fixing seat 18 are all provided with probes, adjacent probes are matched in pairs to form a measurement sound path, the distance between the matched paired probes is a sound path L, and multiple pairs of probes along the length direction of the probe body shell 12 constitute a gas ultrasonic flow sensor capable of multi-point measurement.

[0020] The number of the intermediate probe fixing seat 15 is more than one, and probes are arranged on both sides of the intermediate probe fixing seat 15, and the probes on both sides are matched with other adjacent probes in pairs.

[0021] There are two intermediate probe fixing seats 15, and probes are arranged on both sides of the two intermediate probe fixing seats 15. The probe on the front probe fixing seat 13 is matched with the probe on one side of the first intermediate probe fixing seat in a pair to form a first measuring point; the probe on the other side of the first intermediate probe fixing seat is matched with the probe on one side of the second intermediate probe fixing seat in a pair to form a second measuring point; the probe on the other side of the second intermediate probe fixing seat is matched with the probe on the tail probe fixing seat 18 in a pair to form a third measuring point, and the whole constitutes a gas ultrasonic flow sensor with three-point measurement.

[0022] The three-point measurement gas ultrasonic flow sensor is inserted obliquely into the pipeline 1, the inner diameter of the pipeline 1 is d, the second measuring point in the middle is located at the center of the pipeline, the first measuring point and the third measuring point are respectively located at a distance of d / 4 from the inner walls on both sides of the pipeline, and the three points simultaneously measure and calculate the gas flow in the pipeline.

[0023] The head probe fixing seat 13, the middle probe fixing seat 15 and the tail probe fixing seat 18 are welded to the inner wall of the probe body shell 12, and the probes are fixed on the head probe fixing seat 13, the middle probe fixing seat 15 and the tail probe fixing seat 18 respectively.

[0024] A threading tube 16 is provided between the probes. The threading tube 16 is welded to the inner wall of the probe body shell 12 , and a probe signal line 17 of each probe is led out from the threading tube 16 .

[0025] The acoustic path L of the gas ultrasonic flow sensor at each measuring point is the same.

[0026] The probe body shell 12 is made of a stainless steel seamless steel pipe, and the sensor sound path is determined according to the different pipe diameters that need to be measured on site.

[0027] The probe body connecting rod 4 and the probe body 9 are fastened into one body through threads.

[0028] The multi-point measurement gas ultrasonic flow sensor is inserted into a pipeline 1, a base 2 is welded on the outer wall of one side of the pipeline 1, a mounting hole 19 is provided at a position corresponding to the base 2 on the other side of the pipeline 1, and a tail base 10 is welded on the outer wall of the pipeline outside the mounting hole 19; a hole is opened in the base 2 and a ball valve 3 and a sealing nipple 5 are installed in sequence, a probe body 9 and a probe body connecting rod 4 are inserted into the pipeline 1 through the sealing nipple 5, the ball valve 3 and the base 2, and the end of the probe body 9 is inserted into the mounting hole 19 and the tail base 10.

[0029] The tail base 10 is provided with an observation hole for easy observation and guiding the probe body 9 to be accurately inserted into the tail base 10 . The tail base 10 is provided with a tail sealing cover 11 , and the observation hole is closed by tightening the tail sealing cover 11 .

[0030] An O-ring 6 , a conical sealing gasket 7 and a locking nut 8 are provided between the sealing nipple 5 and the probe body connecting rod 4 to achieve sealing with the probe body connecting rod 4 .

[0031] A flow measurement method for the above-mentioned gas ultrasonic flow sensor structure capable of multi-point measurement, which determines the sound path L of the gas ultrasonic flow sensor for multi-point measurement according to the inner diameter d of the pipeline to be measured and the number of measurement points of the gas ultrasonic flow sensor for multi-point measurement; the gas ultrasonic flow sensor for multi-point measurement is installed in the pipeline by insertion (mature existing technology); the gas ultrasonic flow sensor for multi-point measurement simultaneously measures and calculates the gas flow in the pipeline at multiple points in the pipeline.

[0032] In the embodiment, an ultrasonic sensor with a multi-point measurement function is inserted obliquely into the on-site pipeline, and three measuring points are set. The sound path can be adjusted according to the pipe diameter. The inner diameter of the pipeline 1 is d, and the outer diameter is D. The second measuring point in the middle is located at the center of the pipeline, and the first measuring point and the third measuring point are respectively located at a distance of d / 4 from the inner walls on both sides of the pipeline. The three points simultaneously measure and calculate the gas flow in the pipeline.

[0033] The present invention arranges a plurality of measuring points in the same sensor, and the sound path can be reasonably adjusted and determined according to the inner diameter of the pipeline.

[0034] When installing the gas ultrasonic flow sensor capable of multi-point measurement, firstly weld the base 2 on the outer wall of one side of the pipeline 1, set a mounting hole 19 at the position corresponding to the base 2 on the other side of the pipeline 1, and weld the tail base 10 on the outer wall of the pipeline outside the mounting hole 19; the base 2 is opened with a hole and the ball valve 3 and the sealing nipple 5 are installed in sequence, the probe body 9 and the probe body connecting rod 4 are inserted into the pipeline 1 through the sealing nipple 5, the ball valve 3 and the base 2, and the end of the probe body 9 is inserted into the mounting hole 19 and the tail base 10. The tail base 10 is provided with an observation hole to facilitate observation and guide the probe body 9 to be accurately inserted into the tail base 10, and the tail base 10 is provided with a tail sealing cover 11, which is tightened to close the observation hole. The sealing with the probe body connecting rod 4 is achieved by the O-ring 6, the conical sealing gasket 7 and the locking nut 8 between the sealing nipple 5 and the probe body connecting rod 4.

Claims

1. A gas ultrasonic flow sensor structure capable of multi-point measurement, characterized in that: The invention comprises a probe body (9) and a probe body connecting rod (4), wherein the probe body (9) is arranged at the front end of the probe body connecting rod (4); the probe body (9) comprises a probe body shell (12), a head probe fixing seat (13), a probe (14), a middle probe fixing seat (15) and a tail probe fixing seat (18); the head probe fixing seat (13), the middle probe fixing seat (15) and the tail probe fixing seat (18) are arranged in sequence in the length direction of the probe body shell (12); the number of probes (14) is multiple, and the head probe fixing seat (13), the middle probe fixing seat (15) and the tail probe fixing seat (18) are all provided with probes; adjacent probes are matched in pairs to form a measurement sound path; the distance between the matched paired probes is a sound path L; and multiple pairs of probes along the length direction of the probe body shell (12) form a gas ultrasonic flow sensor for multi-point measurement.

2. The gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 1, characterized in that: The number of the intermediate probe fixing seat (15) is more than one, and probes are arranged on both sides of the intermediate probe fixing seat (15), and the probes on both sides are matched with other adjacent probes in pairs.

3. The gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 2, characterized in that: The number of the intermediate probe fixing seats (15) is two, and probes are arranged on both sides of the two intermediate probe fixing seats (15). The probe on the front probe fixing seat (13) is matched with the probe on one side of the first intermediate probe fixing seat in pair to form a first measurement point; the probe on the other side of the first intermediate probe fixing seat is matched with the probe on one side of the second intermediate probe fixing seat in pair to form a second measurement point; the probe on the other side of the second intermediate probe fixing seat is matched with the probe on the rear probe fixing seat (18) in pair to form a third measurement point, and the whole constitutes a gas ultrasonic flow sensor for three-point measurement.

4. The gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 3 is characterized in that: The three-point measurement gas ultrasonic flow sensor is inserted obliquely into a pipeline (1), the inner diameter of the pipeline (1) is d, the second measurement point in the middle is located at the center of the pipeline, the first measurement point and the third measurement point are respectively located at a distance d / 4 from the inner walls of both sides of the pipeline, and the three points simultaneously measure and calculate the gas flow in the pipeline.

5. A gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 1 or 2, characterized in that: The head probe fixing seat (13), the middle probe fixing seat (15) and the tail probe fixing seat (18) are welded to the inner wall of the probe body shell (12), and the probes are respectively fixed to the head probe fixing seat (13), the middle probe fixing seat (15) and the tail probe fixing seat (18).

6. A gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 1 or 2, characterized in that: A threading tube (16) is provided between the probes. The threading tube (16) is welded to the inner wall of the probe body shell (12), and a probe signal line (17) of each probe is led out from the threading tube (16).

7. A gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 1 or 2, characterized in that: The probe body connecting rod (4) and the probe body (9) are fastened together into one piece via threads.

8. The gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 7, characterized in that: The multi-point measurement gas ultrasonic flow sensor is inserted into a pipeline (1), a base (2) is welded on the outer wall of one side of the pipeline (1), a mounting hole (19) is provided at a position corresponding to the base (2) on the other side of the pipeline (1), and a tail base (10) is welded on the outer wall of the pipeline outside the mounting hole (19); a hole is opened in the base (2) and a ball valve (3) and a sealing nipple (5) are installed in sequence, a probe body (9) and a probe body connecting rod (4) are inserted into the pipeline (1) through the sealing nipple (5), the ball valve (3) and the base (2), and the end of the probe body (9) is inserted into the mounting hole (19) and the tail base (10).

9. The gas ultrasonic flow sensor structure capable of multi-point measurement according to claim 8, characterized in that: The tail base (10) is provided with an observation hole to facilitate observation and guide the probe body (9) to be accurately inserted into the tail base (10). The tail base (10) is provided with a tail sealing cover (11). The observation hole is closed by tightening the tail sealing cover (11).

10. A method for measuring flow of a gas ultrasonic flow sensor structure capable of multi-point measurement according to any one of claims 1 to 9, characterized in that: The acoustic path L of the multi-point-measurement gas ultrasonic flow sensor is determined according to the inner diameter d of the pipeline to be measured and the number of measuring points of the multi-point-measurement gas ultrasonic flow sensor. The multi-point-measurement gas ultrasonic flow sensor is installed on the pipeline in an inserting manner. The multi-point-measurement gas ultrasonic flow sensor measures and calculates the gas flow in the pipeline at multiple points in the pipeline at the same time.

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