CN117387863A - Annular medium sound velocity measuring device and sound velocity measuring method - Google Patents

Abstract

The application provides an annular medium sound velocity measuring device and a sound velocity measuring method, wherein the annular medium sound velocity measuring device comprises a shell, a measuring mechanism and a distance adjusting mechanism; an acoustic cavity for introducing annular medium is arranged in the shell; the shell is provided with a first control valve which is communicated with the acoustic cavity and is used for injecting or discharging annular medium; the measuring mechanism comprises a sliding block, a first sound wave detector arranged in the sliding block and a second sound wave detector arranged in the shell; the first sound wave detector is externally connected with a sound wave generator, and the first sound wave detector and the second sound wave detector are externally connected with an oscilloscope; the sliding block is arranged in the acoustic cavity; the distance adjusting mechanism is arranged on the shell and can drive the sliding block to move relative to the second sound wave detector along the axial direction. According to the method, the distance between the first sound wave detector and the second sound wave detector is changed through the distance adjusting mechanism, and the annular medium is isolated from the measuring mechanism, so that the accuracy of sound velocity measurement is improved.

Description

Annular medium sound velocity measuring device and sound velocity measuring method

Technical Field

The application relates to the technical field of sound velocity measurement, in particular to an annular medium sound velocity measurement device and a sound velocity measurement method.

Background

As the production depth of natural gas wells continues to increase, the tightness of the production casing is particularly important during the production of natural gas wells. The pressure generated by the leaked gas can generate annular space with pressure phenomenon, namely, the outer pipe column is pressed, so that wellhead gas or interlayer fluid channeling is caused, great danger can be caused to personnel, wellhead equipment and environment, and the safety of the gas well pipe column and the integrity of a shaft are seriously threatened.

At present, detection of leakage of a casing and a production string at home and abroad mainly depends on underground monitoring technology, wherein the underground monitoring technology mainly comprises noise logging, temperature logging, borehole logging, electromagnetic logging, ultrasonic logging and the like. Due to the high risk of well logging and long working period, some ground detection methods, such as an annular pressure detection method, a tracer detection method and a sound wave detection method, are gradually developed.

The principle of the acoustic wave detection method is as follows: when the oil pipe leaks, natural gas can form vortex and jet flow at the leakage hole in the oil pipe. Because of the outer casing, the jet is a non-free jet, and in the process leakage sound waves are generated, and the sound waves can propagate along the oil casing annulus in the directions of the well head and the well bottom. Acquiring the acoustic signals by installing an acoustic sensor at a wellhead, and performing autocorrelation analysis on the acoustic signals to obtain time characteristics; then solving the annular sound velocity according to the annular temperature and pressure and the natural gas constant and the adiabatic index; finally, based on the annular sound velocity and the time characteristics, the propagation distance of sound waves can be obtained, and the leakage position of the underground oil pipe can be obtained. Therefore, the method has important significance for measuring the sound velocity of the annular medium of the high-temperature high-pressure gas well and improving the positioning accuracy of the leakage point of the annular oil sleeve based on sound velocity detection.

Disclosure of Invention

In order to measure the annular medium sound velocity of a high-temperature high-pressure gas well, the application provides an annular medium sound velocity measuring device and a sound velocity measuring method, and adopts the following technical scheme:

in a first aspect, the application discloses an annular medium sound velocity measuring device, which comprises a shell, a measuring mechanism and a distance adjusting mechanism;

an acoustic cavity for introducing annular medium is arranged in the shell;

the shell is provided with a first control valve which is communicated with the acoustic cavity and is used for injecting or discharging annular medium;

the measuring mechanism comprises a sliding block, a first sound wave detector arranged in the sliding block and a second sound wave detector arranged in the shell;

the first sound wave detector is externally connected with a sound wave generator, and the first sound wave detector and the second sound wave detector are externally connected with the oscilloscope;

the sliding block is arranged in the sound cavity;

the distance adjusting mechanism is arranged on the shell and can drive the sliding block to move along the axial direction relative to the second sound wave detector.

Through adopting above-mentioned technical scheme, through the distance adjustment mechanism between first sound wave detector and the second sound wave detector, first sound wave detector is as signal transmitting part, and second sound wave detector is as signal receiving part, reads the time difference between two signals through the oscilloscope. The sound velocity of the annular medium can be calculated through the ratio of the moving distance to the time, repeated measurement can be carried out through repeatedly changing the distance between the first sound wave detector and the second sound wave detector, and the system error is reduced.

Further, the first sound wave detector and the second sound wave detector are isolated from the sound cavity through the sliding block and the shell and are not directly contacted with annular medium, so that non-invasive measurement is realized, the influence of the temperature and the pressure of the annular medium on the ultrasonic transducer is reduced, namely, the annular medium pressure is not limited by the bearing capacity of the ultrasonic transducer, and the pressure range is wider.

Optionally, the measuring mechanism further comprises a first sealing cover and a first elastic piece;

a first accommodating cavity is formed in the sliding block, and the first sound wave detector is arranged in the first accommodating cavity;

the first sealing cover is sealed at the opening end of the first accommodating cavity, and the first elastic piece is embedded between the first sealing cover and the first sound wave detector.

Optionally, the measuring mechanism further comprises a second sealing cover and a second elastic piece;

the shell comprises a first sealing cover and a second sealing cover, and the sliding block is arranged at one side, close to the first sealing cover, in the sound cavity;

a second accommodating cavity is formed in the second sealing cover, and the second sound wave detector is arranged in the second accommodating cavity;

the second sealing cover is sealed at the opening end of the second accommodating cavity, and the second elastic piece is embedded between the second sealing cover and the second sound wave detector.

Through adopting above-mentioned technical scheme, first sealed lid seals the slider, and second sealed lid seals the second closing cap to separate first sound wave detector and second sound wave detector and annular medium, realize non-invasive measurement. Simultaneously, first sealed lid and first elastic component can produce certain tight power that supports to first sound wave detector for first sound wave detector pastes tightly with the slider inner wall, thereby further prevents that the slider from appearing the displacement of other directions, ensures sound velocity measuring accuracy. The second sealing cap and the second elastic member function similarly and are not described in detail herein.

Optionally, the adjustable-distance mechanism comprises a screw, an adjusting rod and an adjusting rod fixer;

the screw rod extends from the inside of the shell to the outside of the shell along the axial direction, and the adjusting rod is in threaded connection with the screw rod;

the adjusting rod fixer is arranged on the first sealing cover and is in abutting connection with the adjusting rod and used for limiting the axial movement of the adjusting rod to be connected with the sliding block and the screw rod;

the adjusting rod can rotate to drive the screw rod and the sliding block to axially move along the shell.

Through adopting above-mentioned technical scheme, adjust the pole fixer and can adjust the pole and follow the axial and carry out spacingly, when rotating the regulation pole, the screw rod can drive the slider and follow axial movement to further drive first sound wave detector and remove.

Optionally, the distance adjusting mechanism further comprises a follow-up guide rod, one end of the follow-up guide rod is connected with the sliding block, and the other end of the follow-up guide rod is provided with a scale and penetrates through the second sealing cover.

By adopting the technical scheme, the follow-up guide rod can provide supporting and guiding functions for the sliding block on one hand, so that the moving direction of the sliding block in the shell is more stable; on the other hand, the moving distance of the sliding block can be indicated by a scale at the tail end.

Optionally, the slider is inside to be provided with first wiring groove, the inside second wiring groove that is provided with of screw rod, first wiring groove with second wiring groove intercommunication is used for with corresponding ultrasonic transducer's lead wire draws forth to the casing is outside.

Through adopting above-mentioned technical scheme, first wire way and second wire way supply ultrasonic transducer's lead wire to pass, are favorable to ultrasonic transducer's steady operation.

Optionally, the distance adjusting mechanism further comprises a guide rod, wherein the guide rod is connected with the shell and penetrates through the sliding block.

Through adopting above-mentioned technical scheme, the guide bar can further keep the stability that the slider removed, prevents that it from appearing the skew.

Optionally, the casing further comprises a column body located between the first sealing cover and the second sealing cover, and a heating belt is arranged on the column body and used for heating annular medium inside the casing.

By adopting the technical scheme, the heating belt can adjust the temperature of the annular medium according to the requirement, so that the purpose of measuring the sound velocity of the annular medium at different temperatures is realized, and the influence of the temperature on the sound velocity of the medium to be measured is conveniently researched.

Optionally, a top cover is arranged at the top of the shell, and a temperature controller is arranged on the top cover and used for monitoring the temperature of annular medium in the acoustic cavity.

By adopting the technical scheme, the temperature controller has the function of remote monitoring, and is convenient for operators to remotely monitor the temperature parameters of the annular medium.

Optionally, a pressure transmitter is arranged on the shell and is used for monitoring the pressure of the annular medium in the acoustic cavity.

By adopting the technical scheme, the pressure transmitter has the function of remote monitoring, and is convenient for operators to remotely monitor the pressure parameters of the annular medium.

In a second aspect, based on the above-mentioned annular medium sound velocity measuring device, the present application discloses a sound velocity measuring method, comprising,

adjusting the distance adjusting mechanism to determine the distance between the first sound wave detector and the second sound wave detector;

injecting annular medium into the acoustic cavity through a first control valve;

starting an acoustic wave generator, and acquiring ultrasonic signal time differences of a first acoustic wave detector and a second acoustic wave detector through an oscilloscope;

calculating a sound velocity based on the following formula according to a distance between the first sound wave detector and the second sound wave detector and an ultrasonic signal time difference;

c＝d/Δt；

wherein c is the sound velocity of annular medium, d is the distance between the first sound wave detector and the second sound wave detector, and Δt is the ultrasonic signal time difference of the first sound wave detector and the second sound wave detector.

Based on the technical scheme, the beneficial effect of this application compared with prior art is:

the annular medium sound velocity measuring device in the application measures the annular medium sound velocity by using a time difference method. The distance between the first sound wave detector and the second sound wave detector can be changed through the distance adjusting mechanism when the sound velocity of the annular medium is measured, so that multiple measurements are realized, and the system error during the measurement is reduced; meanwhile, the first sound wave detector and the second sound wave detector are isolated from annular medium through the sliding block and the shell, so that non-invasive measurement is realized when sound velocity is measured, annular medium pressure is not limited by the bearing capacity of the ultrasonic transducer, the accuracy of sound velocity measurement is improved, and the positioning accuracy of the leakage point of the annular oil casing based on sound velocity detection is improved.

Drawings

FIG. 1 is a schematic perspective view of an apparatus for measuring sound velocity of an hollow medium in an embodiment of the present application;

FIG. 2 is a cross-sectional view of an apparatus for measuring sound velocity of an hollow medium in an embodiment of the present application;

FIG. 3 is a schematic block diagram of a measurement mechanism in an embodiment of the present application;

FIG. 4 is a front view of an apparatus for measuring sound velocity of an hollow medium in an embodiment of the present application;

FIG. 5 is a left side view of an apparatus for measuring sound velocity of an medium in an embodiment of the present application;

FIG. 6 is a right side view of an apparatus for measuring sound velocity of an medium in an embodiment of the present application;

fig. 7 is a top view of an apparatus for measuring sound velocity of an medium in an embodiment of the present application.

Wherein:

100. a housing; 101. a top cover; 102. a first base; 103. a second base; 104. a first cover; 105. a second cover; 1051. a second accommodation chamber; 106. a heating belt; 107. a first through hole; 108. a second through hole; 109. a third through hole; 110. a fourth through hole; 111. a fifth through hole; 112. an acoustic cavity;

200. a measuring mechanism; 201. a slide block; 2011. a first accommodation chamber; 202. a first acoustic wave detector; 203. a second acoustic detector; 204. an acoustic wave generator; 205. an oscilloscope; 206. a first sealing cover; 207. a first elastic member; 208. a second sealing cover; 209. a second elastic member; 210. a first wiring groove; 211. a second wiring groove;

300. a distance adjusting mechanism; 301. an adjusting rod; 302. a screw; 303. a follow-up guide rod; 304. a guide rod; 305. an adjusting rod fixer; 306. a limiting block;

400. a temperature controller; 401. a pressure transmitter; 402. a pressure gauge; 403. a first control valve; 404. and a second control valve.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the description of the present disclosure, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.

Various specific embodiments of an annular medium sound velocity measuring device provided by the embodiments of the present disclosure are described in detail below.

When detecting the leakage point of the oil pipe, the acoustic wave detection method has the advantages of high detection speed and high detection efficiency. The inventors found that the sound velocity is an important factor affecting the positioning accuracy when determining the specific position of the leakage point by using the acoustic wave detection method, conventionally calculated according to the formula c= vγrt. Where γ is the adiabatic index of the annular medium, R is the gas constant, and T is the temperature of the annular medium. However, when the sound velocity of natural gas is calculated, the sound velocity is calculated by adopting a theoretical formula inevitably to have errors due to the difference of the components and the content of the natural gas in each well. When the sound velocity of the annular medium is measured by a sound velocity measurement experiment by using an experimental instrument, the pressure bearing capacity of the measuring component is limited, so that the pressure of the annular medium needs to be in a certain range. When the pressure of the annular medium changes greatly, the measuring assembly is not beneficial to normal measuring work, and therefore the accuracy of the sound velocity measuring result is also reduced. Therefore, based on the related technology, in order to accurately measure the sound velocity of the annular medium and further improve the positioning accuracy of the oil casing leakage point, the embodiment of the application provides a sound velocity measuring device and a sound velocity measuring method of the annular medium.

Example 1

Referring to fig. 1 to 2, the device for measuring the sound velocity of an annular medium in the present application comprises a housing 100, a measuring mechanism 200 and a distance adjusting mechanism 300, wherein the measuring mechanism 200 and the distance adjusting mechanism 300 are both arranged on the housing 100, and an acoustic cavity 112 for storing the annular medium is formed inside the housing 100.

Referring to fig. 1, in an alternative embodiment, the housing 100 includes a first cover 104, a second cover 105, and a cylinder between the first cover 104 and the second cover 105, and an enclosed space of the first cover 104, the second cover 105, and the cylinder forms an acoustic cavity 112. The first cover 104 is provided with a first through hole 107, a first control valve 403 is installed at the first through hole 107, the first control valve 403 may be a high-pressure needle valve, and the first control valve 403 is communicated with the acoustic cavity 112 through the first through hole 107 and is used for injecting and discharging annular medium. It should be noted that, in other embodiments, the annular medium may be injected and discharged through two holes, respectively, which provides the following advantages: when measuring the new medium sound velocity, the last residual medium is completely discharged in a mode of injecting and discharging at the same time, so that the influence of the mixing of the two media on the measurement result is avoided.

Referring to fig. 1, in an alternative embodiment, for convenience of carrying and installation, a top cover 101 is provided on the top of a housing 100, and handles are connected to the top cover 101, and the number of handles is not particularly limited, and may be two or one. The number of handles in this embodiment is two, and two handles are located on both sides of the top cover 101 in the width direction. The bottom of the housing 100 is provided with a first base 102 and a second base 103 for stably supporting the whole device and preventing the whole device from rolling.

Referring to fig. 2 and 3, in an alternative embodiment, the measurement mechanism 200 includes a slider 201, a first acoustic wave detector 202 disposed within the slider 201, and a second acoustic wave detector 203 disposed within the housing 100. Specifically, the slider 201 is disposed in the acoustic cavity 112 near the first cover 104, the first accommodating cavity 2011 is formed in the slider 201, the second accommodating cavity 2021 is formed in the second cover 105, the first acoustic wave detector 202 is disposed in the first accommodating cavity 2011, and the second acoustic wave detector 203 is disposed in the second accommodating cavity 2021 of the second cover 105.

The first acoustic wave detector 202 is externally connected with the acoustic wave generator 204 and is used as a signal transmitting end; the second acoustic detector 203 serves as a signal receiving end; the first sound wave detector 202 and the second sound wave detector 203 are both externally connected with an oscilloscope 205. The acoustic wave generator 204 is used for generating an ultrasonic signal, the oscilloscope 205 is used for displaying signals sensed by the first acoustic wave detector 202 and the second acoustic wave detector 203, after the first acoustic wave detector 202 emits the signals, the second acoustic wave detector 203 receives the signals, the time difference between the two signals is read through the oscilloscope 205, and the sound velocity can be obtained through conversion by combining the distance between the first acoustic wave detector 202 and the second acoustic wave detector 203. Specifically, in this embodiment, the first acoustic wave detector 202 and the second acoustic wave detector 203 are both ultrasonic transducers, and the acoustic wave generator 204 is specifically an ultrasonic generator.

Referring to fig. 2, in an alternative embodiment, the measurement mechanism 200 further includes a first seal cap 206 and a first resilient member 207. The first sealing cover 206 is sealed at the opening end of the first accommodating cavity 2011, and is connected with the slider 201 through a bolt, and the first elastic member 207 is embedded between the first sealing cover 206 and the first acoustic wave detector 202, which may be specifically any one of a spring, a sponge, or a rubber. The first elastic member 207 may generate a tightening force on the first acoustic wave detector 202, so that the first acoustic wave detector 202 is tightly attached to the inner wall of the slider 201. Meanwhile, the reserved space inside the sliding block 201 is matched with the first sound wave detector 202 in size, so that the first sound wave detector 203 is further tightly attached to the inner side wall of the sliding block 201, and displacement of the first sound wave detector in other directions in the sliding block 201 is prevented.

Accordingly, referring to fig. 2, for the second cover 105 and the second acoustic wave detector 203, a second seal cover 208 and a second elastic member 209 are also provided. The second sealing cover 208 is sealed to the open end of the second accommodation chamber 1051, and the second sealing cover 208 is connected to the second sealing cover 105 by bolts. The second elastic member 209 is embedded between the second sealing cover 208 and the second acoustic wave detector 203, and may be any one of a spring, a sponge, and a rubber. The second acoustic detector 203 is tightly attached to the inner side wall of the second cover 105, preventing displacement in other directions.

Specifically, referring to fig. 1 and 2, in an alternative embodiment, the adjustable-pitch mechanism 300 includes an adjustment lever 301, a screw 302, and an adjustment lever holder 305, where the screw 302 extends axially from within the housing 100 to outside the housing 100 and is in reciprocating, dynamic sealing connection with the housing 100. One end of the adjusting rod 301 is inserted into the screw 302 and is in threaded connection with the screw 302, and the other end extends out of the housing 100. Specifically, the adjusting rod 301 may be a bolt, and the slider 201 is fixedly connected to one end of the screw 302 away from the adjusting rod 301, so that the same distance as the screw 302 can be moved. The slider 201 is internally provided with a first wiring groove 210, the screw 302 is internally provided with a second wiring groove 211, the second wiring groove 211 is axially arranged along the screw 302, and the first wiring groove 210 and the second wiring groove 211 are mutually communicated through a displacement channel of the screw 302 and are used for leading out leads of the first acoustic wave detector 202 to the outside of the shell 100. In order to lead out the lead smoothly, a channel (not shown) for the lead to pass through is also axially formed in the adjusting rod 301. Similarly, it should be understood that, in order to lead the lead wire of the second acoustic detector 203 out of the housing 100, corresponding wiring grooves (not shown) may be formed in the corresponding second cover 105 and the second sealing cover 208.

Referring to fig. 1 and 2, in an alternative embodiment, the adjustment rod 301 is axially restrained by an adjustment rod holder 305. Specifically, the adjusting rod fixer 305 is disposed on the first cover 104, one end of the adjusting rod fixer 305 is connected with the first cover 104 through a bolt, the other end of the adjusting rod fixer 305 extends out of the limiting block 306, the specific number of the limiting blocks 306 is two, the two groups of limiting blocks 306 are distributed at intervals along the length direction of the adjusting rod fixer 305, and the end part of the adjusting rod 301 is clamped between the two groups of limiting blocks 306, so that the two groups of limiting blocks 306 limit the adjusting rod. The adjustment rod 301 may be specifically threadably coupled to the adjustment rod holder 305. When the adjusting rod 301 is rotated, when the adjusting rod 301 is limited in the axial direction and the screw rod 302 is limited in the circumferential direction, the screw rod 302 can move along the axial direction of the housing 100, and further the sliding block 201 is driven to move along the axial direction of the housing 100.

The implementation manner of the rotation of the adjusting lever 301 is not particularly limited, and may be manual rotation or motor driving.

Referring to fig. 2, in an alternative embodiment, to guide the slider 201, the distance adjusting mechanism 300 further includes a guide rod 304, where the guide rod 304 is fixedly connected to the first cover 104, and the guide rod 304 is disposed through the slider 201. Further, a medium channel 3041 is axially formed in the guide rod 304, and the medium channel 3041 is communicated with the acoustic cavity 112. On the one hand, the guide rod 304 can fix the moving direction of the slider 201 within the housing 100 so that the slider 201 does not move other than the axial direction; on the other hand, the medium channel 3041 in the guide rod 304 is communicated with the first through hole 107, so that the medium to be measured can be guided, so that the medium to be measured is stably introduced into the acoustic cavity 112 along a certain direction and is not easy to contact with the first acoustic wave detector 202 and the second acoustic wave detector 203.

Further, referring to fig. 2, in an alternative embodiment, the distance adjusting mechanism 300 further includes a follower guide 303, where one end of the follower guide 303 is connected to the slider 201, and may be a threaded connection or a fixed connection. The other end of the follower guide 303 is provided with a scale, penetrates through the second sealing cover 105 and extends to the outer side of the shell 100, and specifically, the follower guide 303 can be in reciprocating dynamic sealing connection with the second sealing cover 105, and the scale can be located on the outer side wall of the follower guide 303 or connected to the tail end of the follower guide 303. The follower guide 303 can support the slider 201, and the stability of the movement of the slider 201 can be improved. Since the follower guide 303 is the same as the movement distance of the slider 201, the movement distance of the slider 201 and the first acoustic wave detector 202 can be obtained from the scale.

Referring to fig. 1 and 2, in an alternative embodiment, the distance adjustment mechanism 300 is capable of driving the slider 201 to move axially along the housing 100 relative to the second acoustic wave detector 203, thereby adjusting the distance between the first acoustic wave detector 202 and the second acoustic wave detector 203. It should be noted that, in other embodiments, the second cover 105 may also move relative to the first acoustic wave detector 202 along the axial direction, so long as the first acoustic wave detector 202 and the second acoustic wave detector 203 can be close to and far from each other.

Referring to fig. 4-6, in an alternative embodiment, the first cover 104 is further provided with a second through hole 108, and the second cover 105 is provided with a third through hole 109, a fourth through hole 110, and a fifth through hole 111.

Specifically, referring to fig. 4 to 6, the second through hole 108 is used for installing the screw 302, and the screw 302 is communicated with the acoustic cavity 112 through the second through hole 108 in a dynamic sealing connection manner. The third through hole 109 is provided with a second control valve 404, the second control valve 404 is also communicated with the acoustic cavity 112, the second control valve 404 is connected with a pressure gauge 402 for detecting the pressure of the medium, and the second control valve 404 may be a high-pressure needle valve. The fourth through hole 110 is used for installing a pressure transmitter 401 for monitoring the pressure of the annular medium, and the connection mode is threaded connection and can be externally connected with a display, so that the pressure of the annular medium can be remotely displayed. The fifth through hole 111 is used for mounting the follower guide 303. It will be appreciated that in actual use, the mounting positions of the various through holes and components may be adjusted.

Further, in an alternative embodiment, referring to fig. 4 to 7, a heating belt 106 is further disposed on the column between the first cover 104 and the second cover 105, for heating the medium in the housing 100; the top cover 101 is further provided with a temperature controller 400 for monitoring the temperature of the annular medium in the acoustic cavity 112, adjusting the heating temperature of the heating belt 106 according to the monitoring result, and externally connecting a display, so as to remotely display the temperature of the annular medium.

The implementation principle of the annular medium sound velocity measuring device in the embodiment of the application is as follows: when measuring the sound velocity, the distance between the first sound wave detector 202 and the second sound wave detector 203 is first determined, that is, the slider 201 is adjusted to move a specified distance by the distance adjusting mechanism 300. Specifically, the adjusting lever 301 is turned, and the rotation of the adjusting lever 301 drives the screw 302 to axially move, so as to drive the slider 201 and the follower guide 303 to axially move, that is, drive the ultrasonic transducer 203 in the slider 201 to axially move. Since the moving distance of the follower guide 303 is the same as the moving distance of the first acoustic wave detector 202, the distance is controlled according to the scale at the trailing end of the follower guide 303, thereby obtaining the distance between the first acoustic wave detector 202 and the second acoustic wave detector 203. And then the oscilloscope 205 reads the ultrasonic signal time difference between the first sound wave detector 202 and the second sound wave detector 203, and the sound velocity is calculated according to the ratio of the distance to the time difference.

Example 2

Based on the same inventive concept, the embodiment of the present invention further provides a sound velocity measurement method of the annular medium sound velocity measurement device described in the above embodiment 1, including:

adjusting the distance adjusting mechanism 300 to determine the distance between the first sound wave detector 202 and the second sound wave detector 203;

injecting an annular medium into the acoustic chamber 112 through the first control valve 403;

turning on the sound wave generator 204, and acquiring ultrasonic signal time differences of the first sound wave detector 202 and the second sound wave detector 203 through the oscilloscope 205;

from the distance between the first acoustic wave detector 202 and the second acoustic wave detector 203 and the ultrasonic signal time difference, the sound velocity is calculated based on the following formula:

c＝d/Δt；

where c is the annular medium sound velocity, d is the distance between the first sound detector 202 and the second sound detector 203, and Δt is the ultrasonic signal time difference of the first sound detector 202 and the second sound detector 203.

In a specific embodiment, the distance between the first acoustic wave detector 202 and the second acoustic wave detector 203 may be obtained by a scale at the end of the follower rod 303. That is, initially, the slider 201 is moved to be attached to the second cap 105, and then the adjustment lever 301 is rotated, and since the adjustment lever 301 is restrained in the axial direction, the screw 302 is moved in the axial direction, so that the slider 201 is moved by a prescribed distance, that is, the distance by which the first acoustic wave detector 202 is moved.

The foregoing description includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, as used in the specification or claims, the term "comprising" is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean "non-exclusive or".

Claims (11)

1. An annular medium sound velocity measuring device is characterized by comprising a shell (100), a measuring mechanism (200) and a distance adjusting mechanism (300);

an acoustic cavity (112) for introducing annular medium is arranged inside the shell (100);

a first control valve (403) is arranged on the shell (100), and the first control valve (403) is communicated with the acoustic cavity (112) and is used for injecting and/or discharging annular medium;

the measuring mechanism (200) comprises a sliding block (201), a first sound wave detector (202) arranged in the sliding block (201) and a second sound wave detector (203) arranged in the shell (100);

the first sound wave detector (202) is externally connected with a sound wave generator (204), and the first sound wave detector (202) and the second sound wave detector (203) are externally connected with an oscilloscope (205);

the sliding block (201) is arranged in the acoustic cavity (112);

the distance adjusting mechanism (300) is arranged on the shell (100) and can drive the sliding block (201) to move relative to the second sound wave detector (203) along the axial direction.

2. The annular medium sound velocity measurement device according to claim 1, wherein the measurement mechanism (200) further comprises a first sealing cover (206) and a first elastic member (207);

a first accommodating cavity (2011) is formed in the sliding block (201), and the first sound wave detector (202) is arranged in the first accommodating cavity (2011);

the first sealing cover (206) is sealed at the opening end of the first accommodating cavity (2011), and the first elastic piece (207) is embedded between the first sealing cover (206) and the first sound wave detector (202).

3. The annular medium sound velocity measurement device according to claim 1, wherein the measurement mechanism (200) further comprises a second sealing cover (208) and a second elastic member (209);

the shell comprises a first sealing cover (104) and a second sealing cover (105), and the sliding block (201) is arranged at one side, close to the first sealing cover (104), in the acoustic cavity (112);

a second accommodating cavity (1051) is arranged in the second sealing cover (105), and the second sound wave detector (203) is arranged in the second accommodating cavity (1051);

the second sealing cover (208) is sealed at the opening end of the second accommodating cavity (1051), and the second elastic piece (209) is embedded between the second sealing cover (208) and the second sound wave detector (203).

4. The annular medium sound velocity measurement device according to claim 1, wherein the distance adjusting mechanism (300) comprises an adjusting lever (301), a screw (302) and an adjusting lever holder (305);

the screw rod (302) extends from the inside of the shell (100) to the outside of the shell (100) along the axial direction, and the adjusting rod (301) is in threaded connection with the screw rod (302);

the adjusting rod fixer (305) is arranged on the first sealing cover (105), the adjusting rod fixer (305) is abutted with the adjusting rod (301) and used for limiting the axial movement of the adjusting rod (301), and the sliding block (201) is connected with the screw rod (302);

the adjusting rod (301) can rotate to drive the screw rod (302) and the sliding block (201) to axially move along the shell (100).

5. The annular medium sound speed measurement device according to claim 4, characterized in that the distance-adjusting mechanism (300) further comprises a follower guide rod (303);

one end of the follow-up guide rod (303) is connected with the sliding block (201), and the other end of the follow-up guide rod is provided with a scale and penetrates through the second sealing cover (105).

6. The annular medium sound velocity measurement device according to claim 4, wherein a first wiring groove (210) is formed in the slider (201), a second wiring groove (211) is formed in the screw (302), and the first wiring groove (210) and the second wiring groove (211) are mutually communicated and are used for leading out a lead of the first sound wave detector (202) to the outside of the housing (100).

7. The device according to claim 4, characterized in that the distance-adjusting mechanism (300) further comprises a guide rod (304), which guide rod (304) is connected to the housing (100) and passes through the slide (201).

8. An annular medium sound speed measuring device according to claim 3, characterized in that the housing (100) further comprises a cylinder between the first cover (104) and the second cover (105), the enclosed spaces of the first cover (104), the second cover (105) and the cylinder forming the acoustic cavity (112);

the cylinder is provided with a heating belt (106) for heating the annular medium inside the housing (100).

9. The annular medium sound velocity measurement device according to claim 8, characterized in that a top cover (101) is arranged at the top of the housing (100), and a temperature controller (400) is arranged on the top cover (101) for monitoring the temperature of the annular medium in the acoustic cavity (112) and adjusting the heating temperature of the heating belt (106).

10. An annular medium sound speed measuring device according to claim 1, characterized in that the housing (100) is provided with a pressure transmitter (401) for monitoring the pressure of the annular medium in the acoustic chamber (112).

11. A sound speed measuring method based on the annular medium sound speed measuring device according to any one of claims 1-10, comprising:

acquiring a distance between the first acoustic wave detector (202) and the second acoustic wave detector (203);

injecting an annular medium into the acoustic chamber (112) through a first control valve (403);

starting an acoustic wave generator (204), and acquiring an acoustic wave signal time difference of a first acoustic wave detector (202) and a second acoustic wave detector (203) through an oscilloscope (205);

from the distance between the first sound wave detector (202) and the second sound wave detector (203) and the sound wave signal time difference, the sound velocity is calculated based on the following formula:

c＝d/Δt；

wherein c is the sound velocity of the annular medium, d is the distance between the first sound wave detector (202) and the second sound wave detector (203), and Δt is the sound signal time difference of the first sound wave detector (202) and the second sound wave detector (203).