CN114554317A

CN114554317A - Sound wave communication rod and flow measuring device of thermal insulation sound conduction

Info

Publication number: CN114554317A
Application number: CN202210303136.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Metron Instruments China Co ltd
Current assignee: Metron Instruments China Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-05-27

Abstract

The invention relates to the technical field of fluid flow measurement, in particular to a sound wave communication rod for heat insulation and sound conduction and a flow measurement device. The sound wave communication rod comprises a protective shell, a mounting fixture, a connecting part and a coupling protection sheet, wherein a heat insulation sound guide material is packaged in an inner cavity of the protective shell, the mounting fixture is arranged at the top end of the protective shell and used for connecting an ultrasonic transducer, the connecting part is arranged outside the protective shell and used for connecting a measuring pipeline, the coupling protection sheet is arranged at the bottom end of the protective shell and used for packaging the coupling protection sheet, and the bottom end of the sound wave communication rod extends into the inner part of the measuring pipeline and contacts with fluid to be measured to conduct sound waves when in use. The flow measuring device comprises an ultrasonic transducer, a sound wave communication rod and a locking device. The invention can accurately measure the flow of high-low temperature fluid in the pipeline, has better heat insulation and sound conduction effects and convenient operation, and can effectively solve the technical problem that the flow cannot be measured because the existing ultrasonic flowmeter cannot directly contact the high-low temperature fluid.

Description

Sound wave communication rod and flow measuring device of thermal insulation sound conduction

Technical Field

The invention relates to the technical field of fluid flow measurement, in particular to a heat-insulation sound-conduction sound wave communication rod and a flow measurement device.

Background

The ultrasonic flowmeter is a device for measuring the flow of fluid in a pipe by using the time difference principle, the flow speed of the fluid in a pipeline is determined by measuring the time of ultrasonic pulses to and from two ultrasonic transducers during forward flow and backward flow of the fluid, and the flow of the fluid is obtained by calculation. The problem of measuring the flow of high-temperature or low-temperature fluid is often encountered in a process pipeline, when the traditional ultrasonic flowmeter measures the flow of fluid, the ultrasonic probe is easily damaged due to overhigh (as high as 600 ℃) or overlow (as low as-140 ℃) of the fluid, the measurement accuracy and the service life of the flowmeter are influenced, and the traditional ultrasonic probe cannot be in direct contact with high-temperature and low-temperature media, so that the ultrasonic flowmeter cannot be widely applied to the measurement of the high-temperature and low-temperature fluid.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a heat-insulating sound-conducting sound wave communication rod (DTC for short) and a flow measurement device. The invention can effectively solve the technical problem that the existing ultrasonic flowmeter can not directly contact high-low temperature fluid and can not measure the flow.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the utility model provides a sound wave communication pole of thermal-insulated sound conduction, includes protecting sheathing, sectional fixture, connecting portion and coupling protection piece, the encapsulation has thermal-insulated sound conduction material in protecting sheathing's the inside cavity, sectional fixture sets up protecting sheathing's top is used for connecting ultrasonic transducer, connecting portion set up protecting sheathing's outside is used for connecting the measurement pipeline, the coupling protection piece sets up protecting sheathing's bottom encapsulates it, and the bottom of sound wave communication pole stretches into the inside conduction sound wave of measurement pipeline to the fluid that awaits measuring when using.

Through above-mentioned technical scheme, the sound wave communication pole passes through connecting portion to be installed on measuring pipe, links to each other with ultrasonic transducer through the sectional fixture, and the inside of sectional fixture carries out acoustics coupling to thermal-insulated sound guide material through coupling material to ultrasonic transducer's sound wave, and the bottom of sound wave communication pole is inserted in the pipeline and is contacted with the fluid that awaits measuring mutually, passes through the coupling protection piece with the sound wave signal and conducts to the fluid that awaits measuring in, realizes flow measurement conversion then. Different from the traditional ultrasonic flowmeter in which an ultrasonic probe needs to be stretched into a pipeline to be in contact with fluid to realize signal transmission, in the technical scheme, the ultrasonic transducer conducts signals through a sound wave communication rod coupled with the ultrasonic transducer, the heat insulation performance and the corrosion resistance of the sound wave communication rod are excellent, the sound wave communication rod transmits sound wave signals of the ultrasonic transducer to high-low temperature fluid to be detected, the ultrasonic transducer does not need to be in direct contact with the high-low temperature fluid, and the service life of the ultrasonic transducer is prevented from being influenced by the damage or corrosion of the ultrasonic transducer.

Further, mounting fixture's top is equipped with the mounting groove and is used for joint ultrasonic transducer, it has coupling material in order to guarantee to transmit ultrasonic transducer's sound wave signal to coat in the mounting groove, ultrasonic transducer with it leads to realize acoustic coupling to insulate against heat between the acoustic material.

Furthermore, the connection mode of the connecting part and the measuring pipeline adopts flange connection, bolt connection or welding.

Further, protective housing, sectional fixture, connecting portion three integrated into one piece help improving holistic structural strength, the coupling protection piece with protective housing fixed connection for carry out structural protection and acoustics coupling to the thermal-insulated sound conduction material of protective housing inside.

Furthermore, the protective shell and the coupling protective sheet are made of metal materials with high mechanical strength.

Furthermore, the protective shell and the coupling protective sheet are made of SS316 stainless steel or titanium metal materials, so that sufficient mechanical strength and sound conduction effect are ensured, and the internal heat-insulating sound conduction material is packaged and protected to adapt to various complex field working condition environments and corrosive high and low temperature media.

Furthermore, the heat-insulation sound-guide material is made of metal or graphite materials with small acoustic damping and heat conductivity coefficient, is packaged in the high-strength protective shell, is used for conducting ultrasonic waves, and has a good heat insulation effect.

The invention also provides a flow measuring device which comprises an ultrasonic transducer, a sound wave communication rod and a locking device, wherein the sound wave communication rod is the sound wave communication rod in the technical scheme, the ultrasonic transducer is detachably connected with the sound wave communication rod, and the sound wave communication rod is fixedly connected with the installation short section on the measuring pipeline through the locking device. Flow measuring device among this technical scheme passes through locking device fixed mounting on waiting to survey the pipeline, and ultrasonic transducer and sound wave communication pole can be installed through modes such as screw thread or buckle to carry out acoustics coupling through modes such as couplant, can realize changing ultrasonic transducer on line according to the technological requirement on scene, guarantee production normal operating, on-the-spot installation and easy dismounting have reduced the maintenance cost of equipment.

Further, locking device laminating sets up the up end department of connecting portion in the sound wave communication pole, the lower terminal surface of connecting portion links to each other with the terminal surface of installation nipple joint, it is fixed to lock through the bolt between locking device and the installation nipple joint.

Compared with the existing flow measuring device, the invention has the following beneficial effects:

according to the invention, the ultrasonic transducer is arranged at the top of the sound wave communication rod, the ultrasonic transducer does not need to be directly contacted with the high-low temperature fluid, and the sound wave signal is transmitted to the high-low temperature fluid to be measured through the sound wave communication rod, so that the flow measurement is realized. The sound wave communication rod provided by the invention has good heat insulation performance and sound wave conduction effect and excellent corrosion resistance, and is suitable for various complex field working condition environments and high and low temperature media. The flow measuring device containing the sound wave communication rod is convenient to install, the ultrasonic transducer can be replaced on line, the maintenance cost of equipment is reduced, the normal operation of production is ensured, and the flow of high and low temperature fluids in a pipeline can be accurately measured. According to the invention, the sound wave communication rod and the ultrasonic transducer are connected through the mounting clamp, the communication rod is connected with the measuring pipeline through the connecting part, the sound wave of the ultrasonic transducer is transmitted to the heat-insulating sound-conducting material through the mounting clamp, and is transmitted to the fluid to be measured through the coupling protection sheet.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of an acoustic communications pole of the present invention;

FIG. 2 is a schematic view of the internal cross-sectional structure of the acoustic communications pole of the present invention;

FIG. 3 is a schematic diagram of the connections between the flow measuring device and the ultrasonic transducer and the conduit of the present invention;

FIG. 4 is a schematic view of a flow measuring device of the present invention incorporating sonic communication bars installed in pairs in a pipe.

The reference numbers in the figures illustrate: 1. a protective housing; 2. installing a clamp; 3. a connecting portion; 4. a coupling protection sheet; 5. a heat insulating and sound conducting material; 6. mounting grooves; 100. an ultrasonic transducer; 200. a sonic communication rod; 300. a locking device; 400. installing short sections; 500. a pipeline; 600. a fluid.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when the products of the present invention are used, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present embodiment, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In an embodiment of the present invention, referring to fig. 1 and 2, an adiabatic sound-guiding acoustic communications pole 200 includes a protective housing 1, a mounting fixture 2, a connecting portion 3, and a coupling protection sheet 4, and an adiabatic sound-guiding material 5 is enclosed in an inner cavity of the protective housing 1. The protective shell 1 and the coupling protection sheet 4 are fixedly connected through welding or threaded connection, and the protective shell 1 and the coupling protection sheet 4 are used for carrying out structural protection and acoustic coupling on the heat insulation and sound conduction material 5 inside the protective shell 1. Protective housing 1,

sectional fixture

2, 3 three integrated into one piece of connecting portion help improving holistic structural strength. The protective shell 1 and the coupling protective sheet 4 are made of metal materials with high structural strength, such as SS316 stainless steel or titanium alloy, so as to adapt to various complex field working condition environments and corrosive high and low temperature media.

Specifically, in the present embodiment, as shown in fig. 2 and 3, the mounting fixture 2 is disposed at the top end of the protective housing 1, and the top of the mounting fixture 2 is provided with a mounting groove 6 for clamping the ultrasonic transducer 100. In the mounting groove 6, a coupling agent is coated on the contact surface position between the mounting fixture 2 and the ultrasonic transducer 100 to ensure the transmission of sound wave signals, and the coupling agent transmits the sound waves of the ultrasonic transducer 100 to the heat insulation sound guide material 5 through acoustic coupling. The connecting part 3 is arranged outside the protective shell 1 and used for connecting a measuring pipeline, the connecting part 3 extends outwards relative to the protective shell 1 along the radial direction to form an annular convex step, and the connecting mode of the connecting part 3 and the measuring pipeline can adopt a flange connection mode, a bolt connection mode or a welding mode. The coupling protection sheet 4 is arranged at the bottom end of the protective shell 1 to encapsulate the protective shell, and the coupling protection sheet 4 at the bottom end of the acoustic wave communication rod 200 extends into the interior of the measuring pipeline to conduct acoustic waves to fluid to be measured when the device is used.

In this embodiment, the heat insulation and sound conduction material 5 is made of a metal material with small acoustic damping and small heat conductivity coefficient, such as iron or stainless steel, or a graphite material for conducting ultrasonic waves, and has a good heat insulation effect. The heat insulation and sound conduction material 5 is in a filiform, rod-shaped or strip-shaped structure, is provided with a plurality of groups, and is longitudinally arranged and encapsulated in the protective shell 1.

Referring to fig. 3, the acoustic wave communication rod 200 of this embodiment is installed on the installation nipple 400 on the pipeline 500 through the connection portion 3, and is connected to the ultrasonic transducer 100 through the installation fixture 2, and the acoustic coupling transmission signal is performed on the acoustic wave of the ultrasonic transducer 100 through the coupling material arranged inside the installation fixture 2 to the heat insulation and sound conduction material 5, and the bottom end of the acoustic wave communication rod 200 is inserted into the pipeline to contact with the fluid to be measured, and the acoustic wave pulse signal emitted by the ultrasonic transducer 100 is transmitted to the fluid to be measured through the coupling protection sheet 4, so as to implement the flow conversion measurement. Different from the traditional ultrasonic flowmeter which needs to stretch an ultrasonic probe into a pipeline to be in contact with fluid to realize signal transmission, the ultrasonic transducer 100 in the embodiment conducts signals through the sound wave communication rod 200 coupled with the ultrasonic transducer, the heat insulation performance and the corrosion resistance of the sound wave communication rod 200 are excellent, the sound wave communication rod 200 transmits the sound wave signal of the ultrasonic transducer 100 to the high-temperature or low-temperature fluid 600 to be detected, the ultrasonic transducer 100 does not need to be directly in contact with the fluid 600, and the phenomenon that the high-temperature or low-temperature fluid 600 is damaged or the ultrasonic transducer 100 is corroded to influence the service life of the ultrasonic transducer is avoided.

In another embodiment of the present invention, a flow measuring device is provided, as shown in fig. 3, comprising an ultrasonic transducer 100, a sonic communication rod 200 and a locking device 300, wherein the sonic communication rod 200 is the sonic communication rod of the above-mentioned embodiments. The ultrasonic transducer 100 and the acoustic wave communication rod 200 are detachably connected by means of threads or buckles, and are acoustically coupled by means of smearing couplant.

According to the on-site process requirements, the ultrasonic transducer 100 can be replaced on line only by taking the ultrasonic transducer 100 out of the mounting fixture 2 of the sound wave communication rod 200, normal production operation is guaranteed, on-site installation and dismounting are convenient, and the maintenance cost of equipment is reduced. The lower end face of the protruding step of connecting portion 3 in the sound wave communication pole 200 links to each other with installation nipple 400, and locking device 300 laminates the up end that sets up at the protruding step of connecting portion 3, all is provided with the mounting hole on locking device 300 and the installation nipple 400 and is used for the construction bolt to lock fixedly to it guarantees sealing performance to set up the metal winding packing ring wherein. Thereby realizing the fixed connection of the acoustic wave communication rod 200 and the installation nipple 400 on the measuring pipeline through the locking device 300.

When the flow measuring device of the embodiment is used, the acoustic wave communication rods are generally installed on a field pipeline in pairs, referring to the installation mode in fig. 4, by measuring the time of the ultrasonic pulse between the two ultrasonic transducers during forward flow and backward flow of the fluid, the two time values are unequal due to the existence of the flow velocity, a time difference exists, the flow velocity of the fluid can be calculated according to the time difference, and then the flow measuring result is obtained through conversion.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a sound wave communication pole of thermal-insulated sound conduction, its characterized in that, includes protecting sheathing (1), sectional fixture (2), connecting portion (3) and coupling protection piece (4), the encapsulation has thermal-insulated sound conduction material (5) in the inside cavity of protecting sheathing (1), sectional fixture (2) set up the top of protecting sheathing (1) is used for connecting ultrasonic transducer (100), connecting portion (3) set up the outside of protecting sheathing (1) is used for connecting the measurement pipeline, coupling protection piece (4) set up the bottom of protecting sheathing (1) encapsulates it, and the bottom of sound wave communication pole stretches into the inside conduction sound wave of measurement pipeline to the fluid that awaits measuring when using.

2. A sound communication bar for insulating and guiding sound according to claim 1, characterized in that the top of the mounting fixture (2) is provided with a mounting groove (6) for clamping the ultrasonic transducer (100), and the mounting groove (6) is coated with a coupling material.

3. A thermally insulated and acoustically conductive acoustic communications pole as claimed in claim 1, characterised in that the connection (3) to the measuring pipe is flanged, bolted or welded.

4. A sound wave communication rod for heat insulation and sound conduction according to claim 1, wherein the protective housing (1), the mounting fixture (2) and the connecting portion (3) are integrally formed, and the coupling protection sheet (4) is fixedly connected with the protective housing (1).

5. A thermally insulated and acoustically guided acoustic communications pole as claimed in claim 1, characterized in that the protective casing (1) and the coupling shield (4) are made of metallic material.

6. A thermally insulated and acoustically guided acoustic communications pole as claimed in claim 5, characterised in that the protective casing (1) and the coupling shield (4) are both of SS316 stainless steel or titanium metal material.

7. A flow measuring device is characterized by comprising an ultrasonic transducer (100), a sound wave communication rod (200) and a locking device (300), wherein the sound wave communication rod (200) adopts the sound wave communication rod according to any one of claims 1-6, the ultrasonic transducer (100) is detachably connected with the sound wave communication rod (200), and the sound wave communication rod (200) is fixedly connected with a mounting nipple (400) on a measuring pipeline through the locking device (300).

8. The flow measuring device according to claim 7, wherein the locking device (300) is attached to an upper end face of a connecting portion (3) in the acoustic communication rod (200), a lower end face of the connecting portion (3) is connected to an end face of the installation nipple (400), and the locking device (300) and the installation nipple (400) are locked and fixed through a bolt.