Ultrasonic heat meter measuring tube

Abstract

The utility model provides an ultrasonic heat meter measuring tube which comprises a measuring channel which is arranged in a fluid channel after being installed, and extension sections are formed at the two ends of the measuring channel. Reflectors are obliquely mounted in the two extension sections, mounting holes are formed in the peripheral sides of the two extension sections, and ultrasonic transducers are mounted on the extension sections through the mounting holes. A rectifying strip is also arranged in at least any one of the two extension sections; the rectifying strips are arranged in the circumferential direction of the inner wall of the extension section and extend in the axial direction of the extension section; the rectification strips are ribs which are formed on the inner wall of the extension section and protrude towards the interior of the extension section. According to the invention, the rectification strip is directly formed in the calorimeter measuring tube, so that a rectification function is directly integrated in the calorimeter, and a corresponding rectification assembly does not need to be continuously installed outside the calorimeter. The structure is small, exquisite and compact, heat meter installation under various complex installation conditions can be adapted, and the requirement of the ultrasonic heat meter for the installation space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic flow velocity measurement, and particularly relates to a measuring pipe of an ultrasonic heat meter. Background Art

[0002] The existing small-diameter ultrasonic heat meters mostly adopt a flow velocity measurement method based on the time difference method, using two mirrors to form a U-shaped reflection between a pair of ultrasonic transducers, and calculating the time difference between the forward and reverse processes to deduce the flow velocity information. Ultrasonic flow velocity measurement has relatively high requirements for the fluid flow stability in the measurement channel. Uneven flow velocity and unstable flow field will lead to a large difference between the measured flow velocity and the actual situation, and it is difficult to effectively correct it through technical means. However, in actual situations, there may be cases where elbows, valves, and filters are installed in front of the pipe section, making it impossible to ensure the fluid stability flowing through the ultrasonic heat meter, which will directly affect the measurement results of the ultrasonic heat meter.

[0003] To eliminate this influence, the common practice is to install an independent rectifier in front of the ultrasonic heat meter to achieve the purpose of stabilizing the fluid in front of the heat meter. However, this requires a longer straight-section installation position, and problems such as limited installation space may be encountered at the installation site, and sufficient installation space cannot be arranged to install the rectifier and the ultrasonic heat meter in sequence. Summary of the Utility Model

[0004] In order to provide a more compact and convenient ultrasonic heat meter with smaller installation space requirements and reduce the installation space requirements of the ultrasonic heat meter, the utility model provides a measuring pipe of an ultrasonic heat meter.

[0005] The utility model provides a measuring pipe of an ultrasonic heat meter, which includes a measurement channel located in the fluid channel after installation, and extension segments are formed at both ends of the measurement channel;

[0006] Mirrors are inclinedly installed in both of the two extension segments, and installation holes are provided on the circumferences of the two extension segments for installing ultrasonic transducers on the extension segments;

[0007] The ultrasonic waves emitted from the ultrasonic transducer at any end are reflected by the mirror on the same side and then propagate along the channel of the measurement channel, and then are reflected by the mirror at the other end and received by the ultrasonic transducer installed at the other end;

[0008] At least one of the two extension segments is further provided with rectifying strips; a plurality of the rectifying strips are arranged circumferentially on the inner wall of the extension segment, and the rectifying strips extend along the axial direction of the extension segment.

[0009] Preferably, the rectifying strips are rib strips radially distributed in the inner cavity of the extension segment.

[0010] Preferably, a mounting seat is provided in the inner cavity of the extension section, and the mounting seat is used for mounting a reflector.

[0011] Preferably, the back surface of the mounting seat away from the reflector is connected to the rectifying strip.

[0012] Preferably, the mounting seat and the rectifying strip are integrally injection-molded in the extension section.

[0013] Preferably, the mounting seat is arranged at the circumferential center position of the extension section.

[0014] Preferably, it includes a pipe seat and a pipe body detachably connected to the pipe seat; the mounting seat and the rectifying strip are arranged in the inner cavities at both ends of the pipe seat; the mounting hole is arranged on the pipe body, and when the pipe body is covered with the pipe seat, the measurement channel is located between the two reflectors.

[0015] Preferably, the inner diameter of the extension section is larger than the inner diameter of the measurement channel.

[0016] Preferably, the measurement channel is integrally formed on the pipe body; an installation groove for accommodating the measurement channel is formed on the pipe seat, and both ends of the installation groove are connected to the extension section.

[0017] Preferably, grooves are formed at both ends of the installation groove close to the extension section, and convex ribs are formed on the outer edges of the ends of the measurement channel of the pipe body; when the pipe body and the pipe seat are spliced to form a complete channel, the convex ribs are buckled in the grooves.

[0018] The rectifying strip directly formed in the measuring pipe of the heat meter in the present invention realizes the direct integration of the rectifying function in the heat meter, and there is no need to install corresponding rectifying components outside the heat meter. Its structure is small and compact, can adapt to the installation of heat meters under various complex installation conditions, and reduces the requirement of the ultrasonic heat meter for the installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an exploded structural view of the measuring pipe of the ultrasonic heat meter of the present invention;

[0020] Figure 2 is a structural view of the measuring pipe of the ultrasonic heat meter of the present invention;

[0021] Figure 3 is a front view of the end of the measuring pipe of the ultrasonic heat meter of the present invention.

[0022] In the figure:

[0023] 1: Socket; 11: Measurement channel; 12: Extension section; 13: Reflector; 14: Mounting hole; 15: Mounting base; 16: Rectifying strip; 2: Tube body; 21: Mounting groove. Detailed implementation manner

[0024] The following combines the drawings and specific embodiments to elaborate on the present utility model in detail. In this specification, the dimensions of the drawings do not represent the actual size ratio. The drawings are only used to reflect the relative positional relationship and connection relationship between components. Components with the same name or the same reference numeral represent similar or identical structures, and are for illustrative purposes only.

[0025] Figure 1 It is an exploded view of the structure of the measurement tube of the ultrasonic heat meter of the present utility model. Figure 2 It is a schematic diagram of the structure of the measurement tube of the ultrasonic heat meter of the present utility model. Figure 3 It is a front view of the end of the measurement tube of the ultrasonic heat meter of the present utility model. The measurement tube includes a measurement channel 11 installed in the fluid channel after installation. Extension sections 12 extending are formed at both ends of the measurement channel 11. Reflectors 13 are installed obliquely in both extension sections 12, and mounting holes 14 are provided on the circumferential side of the extension sections 12. The mounting holes 14 are used to mount ultrasonic transducers on the extension sections 12. The ultrasonic waves emitted from the ultrasonic transducer at any end are reflected by the reflector 13 on the same side and then propagate along the measurement channel 11, and then are reflected by the reflector 13 at the other end to be received by the ultrasonic transducer installed at the other end. At least one of the two extension sections is also provided with a rectifying strip 16 to ensure that the flow process of the fluid with an uncertain flow state tends to be stable before flowing through the measurement channel 11, and improve the accuracy of ultrasonic flow velocity measurement. A plurality of rectifying strips 16 are arranged circumferentially on the inner wall of the extension section 12, and the rectifying strips 16 extend along the axial direction of the measurement channel 11 of the extension section 12. The rectifying strips 16 are rib strips radially distributed in the inner cavity of the extension section 12, and they can be formed on the inner wall of the extension section 12 and protrude into the interior of the extension section 12.

[0026] The rectifying strip 16 is at least formed on the extension section 12 at one end of the measurement channel. Then, when the ultrasonic heat meter is installed, the tube end provided with the rectifying strip 16 should be installed as the inlet. The rectifying strip 16 can also be formed on the extension sections 12 at both ends of the measurement channel 11 so that the forward and reverse directions of the measurement channel 11 do not need to be distinguished during installation.

[0027] Regardless of the above installation states, ensure that the rectifying strip 16 is located upstream of the measurement channel 11. Before the oncoming flow enters the measurement channel 11, it will first enter the extension section 12 with the rectifying strip 16. The rectifying strip 16 divides the fluid channel of the extension section 12 into multiple different flow regions, so that the fluid is respectively guided to flow along the axial direction of the extension section 12 under the action of the rectifying strip 16, and then converges again within the extension section 12 and flows into the measurement channel 11, thereby achieving the purpose of rectification and improving the ultrasonic flow velocity measurement accuracy.

[0028] As Figure 1 shown, a mounting seat 15 is also provided in the inner cavity of the extension section 12. The front surface of the mounting seat 15 is used to mount the mirror 13, and the back surface of the mounting seat is connected to a number of rectifying strips 16 to realize the support and fixation of the mounting seat 15. The extension section 12 is preferably formed by an integral injection molding process to integrally form the mounting seat 15, the rectifying strip 16 and the extension section 12. The mounting seat 15 is preferably arranged at the circumferential center position of the extension section 12. The ends of a number of rectifying strips 16 close to the measurement channel 11 are integrally connected to the back surface of the mounting seat 15 to realize the support and fixation of the mounting seat 15, and the front surface of the mounting seat 15 is used to fix the mirror 13. The projection of the mounting seat 15 perpendicular to the axial direction of the extension section 12 is preferably circular, so that the fluid channels around the mounting seat 15 are generally of equal width, which is conducive to the fluid rectified by the rectifying strip 16 to bypass the mounting seat 15 evenly and enter the measurement channel 11, thereby improving the uniformity of fluid flow in the measurement channel 11. The back surface of the mounting seat 15 preferably has a curved cross-section facing the flow to reduce the obstruction and interference of the back surface to fluid flow, and is conducive to the stable flow of the fluid after passing through the mounting seat 15 and entering the measurement channel 11.

[0029] For facilitating the mold opening and assembly of the pipe, the measuring pipe of the ultrasonic heat meter of the present utility model comprises a pipe seat 1 and a pipe body 2 which are detachably connected. An installation seat 15, a rectifying strip 16 and a reflecting mirror 13 are formed on the pipe seat 1, and an installation hole 14 is formed on the pipe body 2. The pipe body 2 and the pipe seat 1 are separated at the installation seat 15 of the extension section 12 to facilitate the installation of the reflecting mirror 13 in the disassembled state. Generally, the parting surface can be considered to extend along the axial direction of the measuring channel 11, so that the pipe segments of the measuring channel 11 belong to the pipe seat 1 and the pipe body 2 respectively. After the pipe body 2 and the pipe seat 1 are covered, the measuring channel 11 is still located between the two reflecting mirrors 13 to achieve the function of ultrasonic flow velocity measurement in the measuring channel 11. However, in order to ensure the smooth cross-section of the measuring channel 11 without splicing steps, ensure the stable flow of the fluid in the measuring channel 11, ensure the concentricity of the circular cross-section of the measuring pipe, and improve the measurement accuracy, preferably, the measuring channel 11 is integrally formed on the pipe body 2, and an installation groove 21 for accommodating the measuring channel 11 is formed on the pipe seat 1. In addition to accommodating the measuring channel 11, the installation groove 21 is also used to connect the two extension sections 12 at both ends as a whole on the pipe seat 1. Grooves are formed at both ends of the installation groove 21 close to the extension section 12, and convex ribs are formed on the outer edge of the end of the measuring channel 11 of the pipe body 2. When the pipe body 2 and the pipe seat 1 are spliced to form a complete channel body, the convex ribs are buckled in the grooves to ensure the precise limit between the measuring channel 11 and the extension section 12, and at the same time ensure the smoothness of the joint, avoid the fluid from entering the installation groove 21, and enable the fluid to flow completely through the measuring channel 11. Both the above-mentioned pipe seat 1 and the pipe body 2 can be considered to be made by an integral injection molding process.

[0030] The measuring pipe of the ultrasonic heat meter of the present utility model realizes the rectification of the incoming flow without additionally installing a rectifier by arranging ribs at the inlet of the measuring pipe. Its structure is small and compact, can adapt to the installation of heat meters under various complex installation conditions, and reduces the requirement of the ultrasonic heat meter for the installation space.

[0031] The above content is only a description of the preferred embodiment of the present utility model, and does not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An ultrasonic heat meter measuring tube, characterized in that: It comprises a measuring channel (11) which is located in the fluid channel after installation, and an extension section (12) is formed at both ends of the measuring channel (11); Reflecting mirrors (13) are installed in an inclined manner in both of the extension sections (12); mounting holes (14) are provided on the circumference of the two extension sections (12); the mounting holes (14) are used to install ultrasonic transducers on the extension sections (12); The ultrasonic wave emitted from the ultrasonic transducer at either end is reflected by the reflector (13) at the same side and propagates along the measuring channel (11), and then is reflected by the reflector (13) at the other end and received by the ultrasonic transducer installed at the other end; A straightening strip (16) is also provided in at least one of the two extension sections (12); a plurality of the straightening strips (16) are provided on the circumference of the inner wall of the extension section (12), and the straightening strips (16) extend along the axial direction of the extension section (12).

2. The ultrasonic heat meter measuring tube according to claim 1, characterized in that: The rectifying strips (16) are ribs radially distributed in the inner cavity of the extension section (12).

3. The ultrasonic heat meter measuring tube according to claim 1, characterized in that: A mounting seat (15) is provided in the inner cavity of the extension section (12), and the mounting seat (15) is used to mount the reflector (13).

4. The ultrasonic heat meter measuring tube according to claim 3, characterized in that: The back side of the mounting seat (15) away from the reflector (13) is connected to the rectifying bar (16).

5. The ultrasonic heat meter measuring tube according to claim 4, characterized in that: The mounting seat (15) and the rectifying strip (16) are integrally injection-molded in the extension section (12).

6. The ultrasonic heat meter measuring tube according to claim 3, characterized in that: The mounting seat (15) is arranged at the circumferential center position of the extension section (12).

7. The ultrasonic heat meter measuring tube according to claim 4, characterized in that: The invention comprises a tube seat (1) and a tube body (2) detachably connected to the tube seat (1); the mounting seat (15) and the rectifying strip (16) are arranged in the inner cavity at both ends of the tube seat (1); the mounting hole (14) is arranged on the tube body (2); when the tube body (2) and the tube seat (1) are covered, the measuring channel (11) is located between the two reflectors (13).

8. The ultrasonic heat meter measuring tube according to claim 7, characterized in that: The inner diameter of the extension section (12) is greater than the inner diameter of the measuring channel (11).

9. The ultrasonic heat meter measuring tube according to claim 7, characterized in that: The measuring channel (11) is completely formed on the tube body (2); a mounting groove (21) for accommodating the measuring channel (11) is provided on the tube seat (1), and both ends of the mounting groove (21) are connected to the extension section (12).

10. The ultrasonic heat meter measuring tube according to claim 9, characterized in that: The mounting groove (21) is formed with grooves at both ends close to the extension section (12), and the outer edge of the end of the measuring channel (11) of the tube body (2) is formed with ridges; when the tube body (2) and the tube seat (1) are spliced ​​to form a complete channel, the ridges are buckled in the grooves.

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