Ultrasonic flowmeter with built-in sensor

Abstract

The ultrasonic flowmeter with the built-in sensor comprises a main body, an inlet connector and an outlet connector, the inlet connector and the outlet connector are arranged at the two ends of the main body respectively, a lining is arranged in an inner cavity of the main body, and a rectification piece is arranged between the medium inlet end of the main body and the lining. A lining is arranged in the main body, the lining is a special-shaped pipe with stepped inclined planes at the front and the back, a measuring hole is formed in each stepped inclined plane, and an ultrasonic sensor is arranged in each measuring hole and is fixed through a pressing block; the utility model has the beneficial effects that the whole structure is simple, the liners and the main body with different inner diameters can be replaced according to different pipe diameters, the disassembly is easy, the replacement is convenient, the application range is wide, the double-sealing structure is reliable in sealing and high in safety, the pressure bearing capacity of the ultrasonic sensor is strong, and the service life of the ultrasonic sensor is prolonged. The measurement value is more accurate, the metering result of the flowmeter is more reliable, the display meter realizes visual metering, the reading is simple, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of built-in ultrasonic flowmeters, in particular to a sensor built-in ultrasonic flowmeter. Background Art

[0002] Ultrasonic flowmeters are usually used in the fields of petroleum, chemical industry, LNG, etc. to measure the medium in the pipeline. Ultrasonic flowmeters generally fix the sensor on the outer wall of the pipeline. Due to the pressure difference between the pipeline and the outside world, especially in high-pressure pipelines, traditional ultrasonic sensors have poor pressure bearing capacity, are easily damaged, and holes are opened on the pipeline wall, which makes the pipeline easily damaged. The sealing between the pipeline and the flowmeter is not high, the flow measurement is inaccurate, and the flow value cannot be clearly recorded. The Chinese utility model patent with the authorization announcement number CN217083841U discloses "a self-rectifying ultrasonic flowmeter structure", which is mainly installed on the gas pipeline. The flowmeter with a rectifier is set at the center of the metering cavity. However, only one downstream ultrasonic sensor and a reverse ultrasonic sensor are set on the metering cavity. It is necessary to receive ultrasonic signals through the reflection and refraction of ultrasonic signals to analyze the gas flow rate. The flow rate value is not accurately measured. One side of the ultrasonic sensor goes deep into the pipeline, and the other part is outside the pipeline, which damages the pipeline wall. The installation and sealing requirements of the ultrasonic sensor position are high, and it is difficult to use it in pipelines under high pressure conditions. The flowmeter is a fixed structure with poor replaceability and limited scope of application. Summary of the invention

[0003] In order to solve the technical problems of low sealing and inaccurate measurement of traditional ultrasonic flow meters, the utility model provides a sensor-built-in ultrasonic flow meter, which adopts an ultrasonic sensor arranged on a detachable liner structure, and different liners can be replaced to adapt to pipes of different inner diameters, and then sealed and connected to the original pipe through an independent flow meter structure. The overall structure is simple, replacement is convenient, and the application range is wide. The ultrasonic sensor is entirely in the medium without destroying the pipe wall, which solves the problem of ultrasonic sensor installation and sealing. The sealing is reliable and suitable for any pipe. The ultrasonic sensor is measured together with a stable pressure sensor, and the flow measurement is accurate and reliable, and the measurement value can be visualized.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sensor-built-in ultrasonic flowmeter comprises a main body, an inlet joint and an outlet joint, wherein the inlet joint and the outlet joint are respectively arranged at two ends of the main body, an inner liner is arranged in the inner cavity of the main body, and a rectifying piece is arranged between the medium entry end of the main body and the inner liner; the inner liner is a special-shaped tube with stepped slopes at the front and back, the inner wall of the special-shaped tube is a circular tube wall, a measuring hole is arranged on the stepped slope, the measuring hole directly passes into the circular tube wall, an ultrasonic sensor is arranged in the measuring hole, and the ultrasonic sensor is fixed on the stepped slope of the liner by a pressing block; a stable pressure sensor is arranged on the main body, the stable pressure sensor is connected with the inner cavity of the main body, and a display meter is arranged on the outside of the main body.

[0006] Furthermore, the inner liner is provided with a circular interface with a pressure balancing groove at the medium outlet position.

[0007] Furthermore, joint sealing rings are provided between the main body and the inlet joint, and between the main body and the outlet joint.

[0008] Furthermore, a rectifying sealing ring is provided between the rectifying piece and the main body, and between the rectifying piece and the inner liner.

[0009] Furthermore, the stepped slopes are arranged in a mirror-inverted symmetric manner at the front and rear ends of the lining, a center line connecting the two stepped slopes is a straight line, and an angle of 30° to 45° is formed between the center line and the center line of the lining.

[0010] Furthermore, the ultrasonic sensors are arranged in pairs on opposite sides in the measuring holes of the stepped slope.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. An ultrasonic sensor is set on a detachable lining structure, and then sealed and connected to the original pipeline through an independent flow meter structure. The overall structure is simple, and the lining and main body with different inner diameters can be replaced according to different pipe diameters. It is easy to disassemble and replace, and has a wide range of applications.

[0013] 2. Ultrasonic sensors are set on opposite sides in both directions to transmit and receive ultrasonic signals to each other. The signal transmission is accurate, the double sealing structure is reliable and safe, and the ultrasonic sensor is in the medium as a whole. The ultrasonic sensor is located in the inner cavity of the main body, and there is no need to destroy the main pipe wall, which solves the sealing problem of the ultrasonic sensor. The flow meter has high sealing performance and is suitable for measuring media in any pipeline.

[0014] 3. The ultrasonic sensor is combined with the pressure sensor to measure the flow rate of the medium. The flow value is more accurate, the flow meter measurement result is more reliable, the display table realizes visual measurement, the reading is simple, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural sectional view of a sensor-built-in ultrasonic flowmeter described in the utility model.

[0016] Figure 2 It is a schematic diagram of the appearance structure of the ultrasonic flowmeter described in the utility model.

[0017] Figure 3 It is an axonometric view of the appearance structure of the ultrasonic flowmeter described in the utility model.

[0018] Figure 4 It is a schematic diagram of the structure of the liner, sensor and pressing block described in the utility model.

[0019] Figure 5 It is an axonometric view of the liner, sensor and pressure block structure of the utility model.

[0020] In the figure: 1. Main body; 2. Inlet joint; 3. Outlet joint; 4. Joint sealing ring; 5. Rectification sealing ring; 6. Rectification piece;

[0021] 7. Stable pressure sensor; 8. Lining; 9. Display table; 10. Measuring hole; 11. Step slope; 12. Ultrasonic sensor;

[0022] 13. Pressure block; 14. Circular interface; 15. Pressure balance groove; α. Measurement angle. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0024] like Figure 1-Figure 5 As shown, the working principle of a sensor-built-in ultrasonic flowmeter is as follows: when in use, the flowmeter is installed in the required pipeline, and the medium passes through the flowmeter from the inlet joint 2, the rectifier 6, the liner 8, and the outlet joint 3 in sequence. The ultrasonic sensor 12 installed on the liner 8 emits a detection ultrasonic signal at an angle of 45° to the flow direction of the medium, and the ultrasonic sensor 12 on the opposite side receives the detection ultrasonic signal. The ultrasonic signal records the flow information of the medium. The stable pressure sensor 7 arranged on the main body 1 receives the pressure value inside the flowmeter, and the relevant information is uploaded to the display 9 and displayed after processing. The corresponding medium flow rate, flow rate and other information are calculated more accurately through the linkage and coordination between the pressure value and the flow value.

[0025] like Figure 1-Figure 5As shown, a sensor built-in ultrasonic flowmeter includes a main body 1, an inlet joint 2 and an outlet joint 3, wherein the inlet joint 2 and the outlet joint 3 are respectively arranged at both ends of the main body 1, an inner lining 8 is arranged in the inner cavity of the main body 1, and a rectifying piece 6 is arranged between the medium entrance end of the main body 1 and the inner lining 8; during the measurement process, since the rectifying piece 6 is arranged between the inner lining 8 and the main body 1, all the medium in the pipeline enters the inner lining 8 of the flowmeter through the rectifying piece 6, so as to ensure the accuracy of the measurement, and rectifying sealing rings 5 ​​are arranged between the rectifying piece 6 and the main body 1 and the inner lining 8, so as to have a good sealing effect; the inner lining 8 is a special-shaped tube with stepped slopes 11 at the front and back, and the inner wall of the special-shaped tube is a circular tube wall, and a measuring hole 10 is arranged on the stepped slope 11, and the measuring hole 10 is directly connected to the circular tube wall, and an ultrasonic sensor 12 is arranged in the measuring hole 10, and the ultrasonic sensor 12 is fixed on the stepped slope 11 of the inner lining 8 by a pressing block 13, and the measuring hole 10 is connected to the inner diameter of the inner lining 8, and when the medium passes through It also enters the measuring hole 10. The ultrasonic sensor 12 arranged in the measuring hole 10 is in direct contact with the medium. There is no second signal transmission medium, and the measurement is more accurate. A stable pressure sensor 7 is arranged on the main body 1. The stable pressure sensor 7 is connected to the inner cavity of the main body 1. The inner cavity of the main body 1 is connected to the outlet of the lining 8 through a pressure balance groove 15. The medium flowing through the lining 8 is filled into the inner cavity of the main body 1 through the pressure balance groove 15. The pressure of the medium filled into the inner cavity of the main body 1 is the same as the pressure of the medium in the lining 8. The stable pressure sensor 7 is connected to the inner cavity of the main body 1, so the pressure and stability of the medium in the lining 8 can be measured. The pressure value is calculated in conjunction with the ultrasonic measurement value measured by the ultrasonic sensor 12, and then the flow rate and flow rate and other medium information are calculated more accurately. A display table 9 is arranged on the outside of the main body 1. After the pressure value and the ultrasonic measurement value are processed and calculated in the display table 9, the accurate flow rate, flow rate and other medium values ​​obtained are displayed on the display table 9, so as to achieve visual measurement.

[0026] like Figure 4 , Figure 5 As shown, further, the liner 8 is provided with a circular interface 14 with a pressure balancing groove 15 at the medium outlet position. The pressure balancing groove 15 is provided at the outlet of the liner 8. When the medium in the liner 8 flows through the pressure balancing groove 15, the inner cavity between the main body 1 and the liner 8 is filled through the pressure balancing groove 15. In this way, the inside of the tube of the liner 8 and the space between the outer wall of the liner 8 and the inner wall of the main body 1 are filled with the medium. The ultrasonic sensor 12 arranged on the liner 8 is completely in the medium. The ultrasonic sensor 12 directly measures the flow information of the medium in the pipe without destroying the pipe wall. The circular interface 14 of the liner 8 is connected to the inner hole of the pipe of the outlet interface 3, and the connection is more reliable.

[0027] like Figure 1 As shown, further, joint sealing rings 4 are provided between the main body 1 and the inlet joint 2 and between the main body 1 and the outlet joint 3.

[0028] like Figure 1 As shown, further, a rectifying sealing ring 5 is provided between the rectifying piece 6 and the main body 1, and between the rectifying piece 6 and the liner 8, and a sealing ring is provided at each connection position where the medium passes, so as to improve the overall sealing of the flow meter and the accuracy of the measurement.

[0029] like Figure 4 As shown, further, the step slope 11 is arranged in a mirror-inverted symmetry at the front and rear ends of the lining 8, the center line of the two step slopes 11 is a straight line, the center line is at an angle of 45° with the center line of the lining, and the step slope 11 is set at an obliquely opposite position of the lining 8, and the angle between the center line and the center line of the lining 8 is the measurement angle α of the ultrasonic sensor 12, and the measurement angle α is equal to 45°.

[0030] like Figure 4 As shown, further, the ultrasonic sensors 12 are arranged in pairs on opposite sides in the measuring hole 10 of the stepped slope 11, and the connecting line of the ultrasonic sensors 12 on both sides is an oblique line intersecting the center line of the liner 8. The angle between this oblique line and the center line of the liner 8 is the measuring angle α of the ultrasonic sensor 12, α=45°, and the ultrasonic sensor 12 on one side transmits an ultrasonic signal, which goes straight through the medium along the measuring angle α, is received by the ultrasonic sensor 12 on the other side, and then is transmitted to the display table 9. After being processed together with the pressure value in the display table 9, accurate medium flow rate, flow rate and other values ​​are displayed on the display table 9. Stepped slopes 11 are provided at both ends of the inlet and outlet of the liner 8, and ultrasonic sensors 12 are provided on the step slopes 11. The ultrasonic sensors 12 at both ends transmit and receive signals in an oblique straight line, and the signal transmission is more direct and the signal reception is more accurate.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sensor-built-in ultrasonic flowmeter, characterized in that: It includes a main body, an inlet joint and an outlet joint, wherein the inlet joint and the outlet joint are respectively arranged at both ends of the main body, an inner liner is arranged in the inner cavity of the main body, and a rectifying piece is arranged between the medium entrance end of the main body and the inner liner; the inner liner is a special-shaped tube with stepped slopes at the front and back, the inner wall of the special-shaped tube is a circular tube wall, a measuring hole is arranged on the stepped slope, the measuring hole directly passes into the circular tube wall, an ultrasonic sensor is arranged in the measuring hole, and the ultrasonic sensor is fixed on the stepped slope of the liner through a pressing block; a stable pressure sensor is arranged on the main body, the stable pressure sensor is connected with the inner cavity of the main body, and a display meter is arranged on the outside of the main body.

2. The sensor-built-in ultrasonic flowmeter according to claim 1, characterized in that: The inner liner is provided with a circular interface with a pressure balancing groove at the medium outlet position.

3. The sensor-built-in ultrasonic flowmeter according to claim 1, characterized in that: Joint sealing rings are provided between the main body and the inlet joint, and between the main body and the outlet joint.

4. The sensor-built-in ultrasonic flowmeter according to claim 1, characterized in that: A rectifying sealing ring is arranged between the rectifying piece and the main body, and between the rectifying piece and the inner liner.

5. The sensor-built-in ultrasonic flowmeter according to claim 1, characterized in that: The step slopes are arranged in a mirror-inverted symmetric manner at the front and rear ends of the liner, the center line of the two step slopes is a straight line, and the center line forms an angle of 30° to 45° with the center line of the liner.

6. The sensor-built-in ultrasonic flowmeter according to claim 1, characterized in that: The ultrasonic sensors are arranged in pairs on opposite sides in the measuring holes of the stepped slope.

Images