CN116678458A - Ultrasonic flowmeter facilitating interchangeability - Google Patents
Ultrasonic flowmeter facilitating interchangeability Download PDFInfo
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- CN116678458A CN116678458A CN202310552421.4A CN202310552421A CN116678458A CN 116678458 A CN116678458 A CN 116678458A CN 202310552421 A CN202310552421 A CN 202310552421A CN 116678458 A CN116678458 A CN 116678458A
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- 238000009434 installation Methods 0.000 abstract description 24
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
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- 238000012423 maintenance Methods 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
- G01F15/002—Means for regulating or setting the meter for a predetermined quantity for gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Abstract
The invention discloses an ultrasonic flowmeter favorable for interchangeability, which comprises a flowmeter body and a second rectifying component arranged in the flowmeter body, wherein the second rectifying component is arranged in a pore canal of an inlet connecting pipe of the flowmeter body, the second rectifying component comprises a second straight pipe joint and a rectifying component arranged in the second straight pipe joint, one end of the second straight pipe joint is provided with a second connecting flange, the second connecting flange is fixed at the position of an orifice of the inlet connecting pipe through a connecting bolt, and the other end of the second straight pipe joint is positioned in the inlet connecting pipe; the device also comprises a rubber sleeve, wherein the rubber sleeve is clamped between the pore wall of the pore canal and the outer wall of the second straight pipe section. The scheme adopts the built-in rectifying device, shortens the whole length of the flowmeter to ensure better interchangeability with the existing turbine flowmeter, and ensures the installation precision of the rectifying device and reduces the vibration of the rectifying device in the working process by adopting the structural installation mode of the corresponding built-in rectifying device, thereby being beneficial to the flow measurement precision of the ultrasonic flowmeter.
Description
Technical Field
The invention relates to the technical field of metering devices, in particular to an ultrasonic flowmeter beneficial to interchangeability.
Background
The flow meter is the metering equipment necessary in the natural gas pipeline system. For a long time, on natural gas pipeline systems, common flow meter forms are turbine flow meters, orifice plate flow meters, and the like. The mechanical metering equipment is complex in structure, and easy to cause blockage of a flow passage and rust of parts due to water vapor, particulate impurities and the like carried in the natural gas, so that the service life of the flowmeter can be reduced, and meanwhile, accurate metering is extremely unfavorable. The principle of the gas ultrasonic flowmeter is that the gas flow is obtained by utilizing the corresponding relation between the propagation speed of ultrasonic pulses in the gas flow and the speed of the gas flow, namely the propagation speed of ultrasonic pulses in the forward flow is faster than that in the backward flow, and the flow is larger as the propagation time difference of the two ultrasonic pulses is larger. In recent years, with the development of ultrasonic metering technology, the cost of an ultrasonic flowmeter is greatly reduced, and meanwhile, the core structure of the ultrasonic flowmeter is a circuit module and a transducer, so that the performance and the service life of the ultrasonic flowmeter are ensured not to be excessively influenced by a fluid medium, and the ultrasonic flowmeter has ideal metering accuracy under various working conditions and is now an internationally accepted natural gas metering device.
The main advantages of the ultrasonic flowmeter include no pressure drop, but poor stability of the flow field of the medium-low pressure fuel gas in the pipeline, and difficult repeatability to meet the requirement.
In the prior art, a common flow meter for gas flow metering is a turbine flow meter, and according to flow meter parameters (pressure, nominal diameter and the like), the turbine flow meter generally needs to have strict corresponding relation between external dimensions and parameters, and compared with an ultrasonic flow meter capable of replacing the turbine flow meter, an ultrasonic flow meter with a hanging pipe section and a perforated plate needs a larger installation length, so that the turbine flow meter cannot be directly replaced; the U-shaped pipe flowmeter has no end straight pipe section, and the U-shaped pipe only affects the height of the flowmeter, so that the turbine flowmeter on the pipeline can be replaced easily; in order to meet the size requirement of the ultrasonic flowmeter for replacing the turbine flowmeter, the ultrasonic flowmeter with the same measuring function and proper length further comprises a built-in structural form of a rectifier.
With respect to the ultrasonic flowmeter with built-in rectifier, in the prior art, chinese patent application No. CN202111250988.3 provides an ultrasonic flowmeter including an embedded self-rectifying mechanism; chinese patent application No. CN202010057675.5 provides an ultrasonic flow meter comprising a vane fairing assembly, a hollow transition duct, a honeycomb fairing duct.
Further optimization of an ultrasonic flowmeter that can replace an existing on-line turbine flowmeter would undoubtedly advance the further use of ultrasonic flowmeters in the field of gas metering.
Disclosure of Invention
Aiming at the technical problem that the ultrasonic flowmeter capable of replacing the turbine flowmeter on the existing pipeline is further optimized and can certainly promote the further application of the ultrasonic flowmeter in the gas metering field, the invention provides an ultrasonic flowmeter which is beneficial to interchangeability. The ultrasonic flowmeter that does benefit to interchangeability adopts built-in fairing, when shortening flowmeter overall length so that have better interchangeability with current turbine flowmeter, corresponding built-in fairing's structure mounting means can ensure fairing's installation accuracy and reduce fairing's vibrations in the course of the work, does benefit to ultrasonic flowmeter's flow measurement accuracy.
Aiming at the problems, the ultrasonic flowmeter beneficial to interchangeability solves the problems through the following technical points: the ultrasonic flowmeter beneficial to interchangeability comprises a flowmeter body and a second rectifying component arranged in the flowmeter body, wherein the second rectifying component is arranged in a pore canal of an inlet connecting pipe of the flowmeter body, the second rectifying component comprises a second straight pipe joint and a rectifying component arranged in the second straight pipe joint, one end of the second straight pipe joint is provided with a second connecting flange, the second connecting flange is fixed at the position of an orifice of the inlet connecting pipe through a connecting bolt, and the other end of the second straight pipe joint is positioned in the inlet connecting pipe;
the device also comprises a rubber sleeve, wherein the rubber sleeve is clamped between the pore wall of the pore canal and the outer wall of the second straight pipe section.
As described above, an ultrasonic flow meter employing an externally hung straight tube section and a perforated plate will make the ultrasonic flow meter require more installation space than a conventional turbine flow meter can provide after removal. In order to meet the rectification requirement, the ultrasonic flowmeter adopting the U-shaped pipe built-in rectifier has a small meter body length, but the maintenance of the flowmeter is relatively difficult.
The scheme aims at considering the shape and the size of the meter bodies of the turbine flowmeter and the ultrasonic flowmeter, so that the turbine flowmeter used in the existing metering site can be replaced by the ultrasonic flowmeter, and the metering precision of the ultrasonic flowmeter is further ensured on the basis of realizing better interchangeability of the ultrasonic flowmeter.
Specifically, the adoption sets up the rectifier module in the pore of flowmeter body import takeover, and this kind of mode can effectively utilize flowmeter body space for including the ultrasonic flowmeter of rectifier module not only has higher measurement precision, can make ultrasonic flowmeter body length and the equal application down vortex flowmeter's body length be close or unanimous simultaneously, make this type ultrasonic flowmeter have better interchangeability and be used for adapting to the installation space that provides for vortex flowmeter on the pipeline, this installation space includes but is not limited to be used for flange joint, threaded connection and clamp-on connection reservation space.
It can be appreciated that the ultrasonic flowmeter with the built-in rectifying component is a specific type of the installation mode of the associated rectifying component, and the scheme further provides a second installation mode of the rectifying component, which comprises a rubber sleeve, on the basis of the specific type. More detailed: the scheme that adopts the second flange to realize the embedded installation of rectifier module in ultrasonic flowmeter import side has among the prior art, and the fixed position of second flange is located the mouth of pipe of flowmeter, and rectifier module stretches into inside the flowmeter with embedded mode, and rectifier module is deep into ultrasonic flowmeter's one end and is equivalent to for the cantilever end (if set up to rectifier module deep into ultrasonic flowmeter's one end and the inconsistent with the flowmeter casing, the process of fastening corresponding connecting bolt can cause rectifier module to warp), and such mode is when meetting because the great pipeline vibrations that the air current caused, this vibrations can be in cantilever end position is enlarged, and for the sound track, the cantilever end is used for providing the air current for the sound track, just so caused the vibrations of cantilever end to the sound track stability of admitting air unfavorable to even flow field. In this scheme, set up to including the rubber sleeve, when using the rubber sleeve is as the cushion between import takeover inner wall and the second straight tube festival outer wall, utilizes the flexibility of rubber sleeve, can make second rectifier module imbed import takeover smoothly, and when using, the rubber sleeve is the radial constraint that the second straight tube festival outer wall provided, can alleviate the vibrations of rectifier module when using. In practice, the rubber sleeve is preferably made of natural gas corrosion resistant fluororubber.
As the technical scheme of the ultrasonic flowmeter which is favorable for interchangeability, the following steps are adopted:
still further, it is configured that: the rubber sleeve is compressed at all positions in the circumferential direction, and the rubber sleeve, the second straight pipe joint and the inlet connecting pipe are coaxial. The scheme aims at limiting the sizes of the pore canal, the rubber sleeve and the second straight pipe section, and can be used for installing the rubber sleeve in the pore canal before installing the second rectifying component, and providing pressure for the rubber sleeve at the corresponding position of the outer wall of the second straight pipe section in the process of embedding the second rectifying component into the rubber sleeve, so that the rubber sleeve is clamped between the inner wall of the pore canal and the outer wall of the second straight pipe section and generates compression deformation, and the processing capacity of the rubber sleeve on the second straight pipe section is improved. The rubber sleeve, the second straight pipe joint and the inlet connecting pipe are coaxial and aim to limit the relative positions of the rubber sleeve, the second straight pipe joint and the inlet connecting pipe, and are used for realizing: in the process of embedding the second rectifying component into the duct, the embedding direction of the second rectifying component is guided so as to ensure the installation accuracy of the rectifying component and improve the coaxiality of the air channel and the sound channel.
Still further, it is configured that: the rubber sleeve comprises an equal-diameter section and a bell mouth section, and the outer diameter values of all positions of the rubber sleeve are equal;
on the equal-diameter section, the inner diameter values of all positions of the rubber sleeve are equal;
the end of the bell mouth section, which is used for being connected with the equal-diameter section, is the position with the largest inner diameter of the bell mouth section, and the value of the inner diameter at the position with the largest inner diameter is equal to the value of the inner diameter of the equal-diameter section;
on the flare section, the value of the inner diameter of the flare section linearly decreases from the position with the maximum inner diameter to the free end of the flare section;
the end of the rubber sleeve with the horn mouth section is the end of the rubber sleeve penetrating into the pore canal;
the pore diameter values of all the positions of the pore canal are equal, and the pore diameter values are equal to the outer diameter values of the rubber sleeve;
the outer diameter value of each position of the second straight pipe section is equal, and the outer diameter value of the second straight pipe section is equal to the inner diameter value of the equal-diameter section;
the second straight tube section is partially embedded in the flare section. The technical scheme aims at providing the technical scheme which not only can simplify the structural design of the inlet connecting pipe, but also is convenient for the installation of the second rectifying component. Specifically, the shape of the pore canal for configuring the second rectifying component on the inlet connecting pipe is consistent with that of the rubber sleeve: the whole constant diameter post that is of rubber sleeve, the pore canal section that the import takeover was used for installing the rubber sleeve is the constant diameter hole, the internal diameter of constant diameter hole is unanimous with the external diameter of constant diameter post, when the installation, at first, put into the import takeover with the rubber sleeve to the one end that the rubber sleeve set up the constant diameter section is the outer end of rubber sleeve, then, with the leading-in rubber sleeve of second straight tube festival, accomplish the embedding of second fairing assembly to ultrasonic flowmeter, along with the second straight tube festival gets into the horn mouth section, the rubber sleeve of relevant position is compressed, in this way, utilize the rubber sleeve of compressive deformation can not only increase the damping when the outer sleeve shakes, the horn mouth section that the hole is the horn mouth also can be used to outer sleeve direction of motion direction simultaneously, so this scheme is not only a second fairing assembly simple to operate's scheme, simultaneously for the technical scheme that utilizes the rubber sleeve can ensure sound channel and outer sleeve axiality.
Still further, it is configured that: the pore canal comprises a step Kong Duanyi and a straight-through hole section, wherein the outlet end of the step hole section is in butt joint with the inlet end of the straight-through hole section, the outlet end of the straight-through hole section is in butt joint with the sound channel of the flowmeter body, and the pore diameters of all positions of the straight-through hole section are consistent;
the second rectifying component is arranged on the step Kong Duanzhong, and the inner side end surface of the second connecting flange is attached to the step surface on the step hole section. As a person skilled in the art, the second straight pipe section and the second connecting flange are formed as a structural body of stepped shaft-like shape, the above stepped hole section being adapted to the shape of the structural body for mounting the structural body, the through hole Duan Jieshou being for gas from the second rectifying assembly, which gas is introduced to the sound channel through the through hole section. The inboard terminal surface that still sets up to second flange in this scheme pastes with the step face on the step hole section mutually, aims at limiting the concrete mounted position of second rectifier module on import joint pipe axis for to: during calibration of the ultrasonic flow meter, the second fairing assembly is mounted in the ultrasonic flow meter in a unique manner on the inlet nipple axis, and the step surface is used to indicate the mounting location of the second attachment flange on the inlet nipple axis so that the second fairing assembly can be mounted in a particular inlet nipple axis location.
Further, the rectifying component comprises a blade rectifying component and a honeycomb rectifying component, the blade rectifying component is arranged at one end of the second straight pipe section, which is provided with the second connecting flange, and the honeycomb rectifying component is arranged at one end of the second straight pipe section, which is deep into the pore canal;
the axis of the honeycomb rectifying component is collinear with the axis of the through hole section, and the outer diameter of the honeycomb rectifying component is equal to the outer diameter of the through hole section. The scheme provides a specific fairing assembly realization form, as the person skilled in the art, honeycomb fairing assembly is the fairing assembly that has a plurality of steady flow holes along honeycomb fairing assembly axis direction on it, and the cross section of single steady flow hole can set up to be regular hexagon or other shapes, and steady flow hole evenly arranges on honeycomb fairing assembly's cross section, and fluid gets into each steady flow hole after baffling through blade fairing assembly, and back fluid gets into ultrasonic flowmeter's sound track through the straight-through hole section. The honeycomb rectifying assembly may also be considered a tube bundle rectifier. The outer diameter of the honeycomb rectifying component is equal to that of the straight-through hole section, so that the honeycomb rectifying component can be uniform in flow field uniformity at each position of the cross section of the straight-through hole section.
Furthermore, the inner side end surface of the second connecting flange is a conical surface, and the step surface is identical to the inner side end surface in shape. In this scheme inboard terminal surface is the one end that step face pasted on second flange and the import takeover promptly, sets up to be the conical surface, aims at realizing: in the process of fastening the connecting bolt, the axial position of the second connecting flange can be automatically adjusted by utilizing the mutually matched conical surfaces so as to ensure the installation accuracy of the second rectifying component. In particular, the axis of the conical surface on the step surface is arranged to be collinear with the axis of the inlet connection pipe of the flowmeter body.
Further, the second straight pipe section comprises a connecting cylinder and an outer sleeve, the connecting cylinder is arranged at one end of the second connecting flange and forms an integrated structure with the second connecting flange, and the outer sleeve is arranged at one end of the connecting cylinder far away from the second connecting flange;
the integrated structure is made of metal, and the outer sleeve is made of engineering plastic;
the front end of the honeycomb rectifying component is embedded into the connecting cylinder and is welded with the connecting cylinder, and the rear end of the honeycomb rectifying component is embedded into the outer sleeve and is connected with the inner wall of the outer sleeve;
the contact point of the rubber sleeve on the second straight pipe joint is partially or completely positioned on the outer sleeve. In this scheme, set up to connecting cylinder and second flange formula as an organic whole structure, aim at providing a simple structure, convenient processing and the second straight tube festival structural style of manufacturing to provide the tube coupling of suitable length and be used for installing blade rectifying component and honeycomb rectifying component. The integral structure is made of metal, and the honeycomb rectifying component is welded with the connecting cylinder, so that the honeycomb rectifying component is matched with a stainless steel structural member generally, and the aim of strengthening the connection strength of the honeycomb rectifying component and the second straight pipe section is fulfilled; compared with the method of adopting a metal tube to package the honeycomb rectifying component or form the boundary of the fluid flow path on the honeycomb rectifying component, the method is characterized in that the method further comprises the step of adopting the outer sleeve made of engineering plastic, and by utilizing the thicker outer sleeve, the rigidity of the second straight tube section can be ensured to reduce the vibration of the boundary of the flow path under the action of air flow, and meanwhile, the weight of the second straight tube section can be reduced, and the smooth outer sleeve is utilized to strengthen the friction force between the outer sleeve and the rubber sleeve. In some embodiments, when an ultrasonic flow meter is used for gas flow measurements with small temperature changes (e.g., less than 30 ℃), the second straight tube section may be entirely of engineering plastic tubing, saving material while avoiding loosening of the honeycomb fairing assembly. In the implementation, the connecting cylinder and the second connecting flange form an integrated structure which can be in the form of a long-neck butt welding flange so as to obtain a space for installing the blade rectifying component and a space for embedding the honeycomb rectifying component, and an outer sleeve is sleeved on the outer side of the honeycomb rectifying component and is in butt joint with the end part of the integrated structure; otherwise, the connecting cylinder and the second connecting flange can be respectively and independently prepared and finally welded into an integral structure.
Still further, a first pipe section for interfacing with the flowmeter body inlet nipple is included. The scheme aims at utilizing the first straight pipe section to carry out length compensation and is used for realizing: under the condition that the appearance length of the flowmeter body is designed to be a standard value, the first straight pipe section is in butt joint with the flowmeter body when the flowmeter is installed on a pipeline, and the ultrasonic flowmeter which accords with the installation space length of the flowmeter on the current pipeline is configured by utilizing the length of the first straight pipe section. In particular embodiments, for a flow field that uniformly passes through the acoustic duct flow, it is preferred to provide the first straight tube segment with an inner diameter that is greater than the outer diameter of the fairing assembly fluid flow space, as will be readily appreciated for a fairing assembly that includes a blade fairing assembly. More preferably, since the first pipe section needs to be mounted on the pipeline with the flowmeter body to achieve fluid metering, and the first pipe section and the flowmeter body can be regarded as a complete product for replacing the turbine flowmeter, the axis alignment calibration can be set on at least one of the first pipe section and the flowmeter body, and for the way of mounting the complete product on the pipeline by adopting flange connection, the alignment condition of the connecting flange on the flowmeter body and the outlet pipe and the alignment condition of the connecting flange on the first pipe section and the inlet pipe can affect the flow field in the sound channel, the preferred way is that: setting a hole section of the inlet section of the first straight pipe section as a conical hole, wherein the end part of the conical hole is the maximum diameter; the end part of the outlet pipe section of the flowmeter body is provided with a conical hole, and the end part of the conical hole is the maximum diameter position.
Still further, still include first rectification subassembly, first rectification subassembly includes first straight tube coupling, still install the filter screen in the first straight tube coupling. The scheme aims at realizing: if the rectifier module includes honeycomb rectifier module, honeycomb rectifier module's performance is sensitive to filth, the impurity that adheres to above that, this scheme utilizes first straight tube coupling to dispose first rectifier module under the condition that has first straight tube coupling, above filter screen not only can exert orifice plate rectifier effect with even flow field, simultaneously because the filter screen is located the preceding stage of second rectifier module, because the shielding of filter screen, can reduce the probability that filth adhesion, impurity jam even destroyed appear on the second rectifier module that is closer to the sound track for this ultrasonic flowmeter precision decay is slower in the use. For real time monitoring filter screen jam condition to the suggestion is maintained the filter screen, sets up to: the first straight pipe joint is also provided with two pressure taking holes;
defining a filter screen to divide the first straight pipe section into an air inlet side and an air outlet side;
the orifice of one pressure taking hole is positioned on the air inlet side, and the orifice of the other pressure taking hole is positioned on the air outlet side.
The invention has the following beneficial effects:
the second rectifying component structural form and the mounting mode on the flowmeter body that this scheme provided aim at taking into account the shape of the meter body and the size of the meter body of turbine flowmeter and ultrasonic flowmeter for turbine flowmeter that current measurement field use can be replaced by ultrasonic flowmeter, on the basis that the realization makes ultrasonic flowmeter have better interchangeability, further ensure ultrasonic flowmeter's measurement precision.
Drawings
FIG. 1 is a schematic diagram of a second rectifier assembly according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of the inlet nipple position in one particular mounting and operating embodiment of an ultrasonic flow meter according to the present disclosure;
FIG. 3 is a cross-sectional view of the inlet nipple position of an embodiment of an ultrasonic flow meter according to the present disclosure, as distinguished from FIG. 2, including an annular groove;
FIG. 4 is a side view of one embodiment of a first fairing assembly as described herein, with the view port of the side view positioned on the outflow side of the fluid;
FIG. 5 is a schematic view of a specific embodiment of a filter screen according to the present disclosure;
FIG. 6 is a schematic diagram of an embodiment of an ultrasonic flow meter according to the present disclosure that facilitates interchangeability;
FIG. 7 is a schematic structural view of an embodiment of an ultrasonic flowmeter for facilitating interchangeability according to the present disclosure, which is different from FIG. 2 and includes a pressure-taking hole;
FIG. 8 is a schematic view of a partial structure of a second rectifying device according to an embodiment of the present disclosure, for showing a structure of a rubber sleeve and a matching relationship between the rubber sleeve and a second straight pipe section;
fig. 9 is a schematic partial structure of a specific embodiment of the second rectifying device according to the present disclosure, which is used to show a structure of a rubber sleeve and a matching relationship between the rubber sleeve and a second straight pipe section, and is different from fig. 8, in that an inner side end surface of the second connecting flange adopts a conical surface, and the whole second straight pipe section adopts an engineering plastic pipe;
fig. 10 is a partial enlarged view of the portion a shown in fig. 2.
The reference numerals in the drawings are respectively: 1. the flow meter comprises a flow meter body, 11, a blade rectifying assembly, 12, a connecting cylinder, 13, a honeycomb rectifying assembly, 14, an outer sleeve, 15, a rubber sleeve, 16, a second connecting flange, 17, an equal diameter section, 18, a bell mouth section, 2, a first straight pipe section, 21, a pressure taking hole, 22, a second bolt hole, 3, an inlet pipe, 4, an outlet pipe, 5, a filter screen, 6 and an annular groove.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 10, the ultrasonic flowmeter beneficial to interchangeability comprises a flowmeter body 1 and a second rectifying component arranged in a pore canal of an inlet connecting pipe of the flowmeter body 1, wherein the second rectifying component comprises a second straight pipe joint and a rectifying component arranged in the second straight pipe joint, one end of the second straight pipe joint is provided with a second connecting flange 16, the second connecting flange 16 is fixed at the position of an orifice of the inlet connecting pipe through a connecting bolt, and the other end of the second straight pipe joint is positioned in the inlet connecting pipe;
the device further comprises a rubber sleeve 15, wherein the rubber sleeve 15 is clamped between the pore wall of the pore canal and the outer wall of the second straight pipe section.
As described above, an ultrasonic flow meter employing an externally hung straight tube section and a perforated plate will make the ultrasonic flow meter require more installation space than a conventional turbine flow meter can provide after removal. In order to meet the rectification requirement, the ultrasonic flowmeter adopting the U-shaped pipe built-in rectifier has a small meter body length, but the maintenance of the flowmeter is relatively difficult.
The scheme aims at considering the shape and the size of the meter bodies of the turbine flowmeter and the ultrasonic flowmeter, so that the turbine flowmeter used in the existing metering site can be replaced by the ultrasonic flowmeter, and the metering precision of the ultrasonic flowmeter is further ensured on the basis of realizing better interchangeability of the ultrasonic flowmeter.
Specifically, the rectifying component is arranged in the pore canal of the inlet connecting pipe of the flowmeter body 1, so that the meter body space of the flowmeter body 1 can be effectively utilized, the ultrasonic flowmeter comprising the rectifying component not only has higher metering precision, but also can enable the meter body length of the ultrasonic flowmeter to be close to or consistent with the meter body length of the vortex flowmeter under the same application, so that the ultrasonic flowmeter of the type has better interchangeability and is used for adapting to the installation space provided for the vortex flowmeter on a pipeline, and the installation space comprises, but is not limited to, the space reserved for flange connection, threaded connection and clamping connection.
It will be appreciated that, regarding the ultrasonic flowmeter with the built-in rectifying component, the mode of installing the associated rectifying component is specifically selected, and the present solution further provides a second rectifying component installing mode including the rubber sleeve 15 based on the above specific mode. More detailed: the scheme that adopts second flange 16 to realize that the rectifier module is embedded in ultrasonic flowmeter entrance side among the prior art, the fixed position of second flange 16 is located the mouth of pipe of flowmeter, and the rectifier module stretches into inside the flowmeter with embedded mode, and the one end that the rectifier module in ultrasonic flowmeter is equivalent to for the cantilever end (if set up to the one end that the rectifier module in ultrasonic flowmeter is inconsistent with the flowmeter casing, the process of fastening corresponding connecting bolt can cause the rectifier module to warp), and such mode is when meetting because the great pipeline vibrations that the air current caused, this vibrations can be in cantilever end position is enlarged, and for the sound track, the cantilever end is used for providing the air current for the sound track, just so caused the vibrations of cantilever end to the sound track stability of admitting air unfavorable to even flow field. In this scheme, set up to including rubber sleeve 15, when using rubber sleeve 15 is as the cushion between import takeover inner wall and the second straight tube festival outer wall, utilizes the flexibility of rubber sleeve 15, can make second rectifier module imbed import takeover smoothly, and when using, rubber sleeve 15 is the radial constraint that the second straight tube festival outer wall provided, can alleviate the vibration of rectifier module when using. In practice, the rubber sleeve 15 is preferably made of natural gas corrosion resistant fluororubber.
Example 2:
this example was further refined on the basis of example 1:
still further, it is configured that: the rubber sleeve 15 is compressed at all positions along the circumferential direction, and the rubber sleeve 15, the second straight pipe joint and the inlet connecting pipe are coaxial. The size of the duct, the rubber sleeve 15 and the second straight pipe section is limited, in order to achieve the compression purpose, the rubber sleeve 15 is installed in the duct before the second rectifying component is installed, the corresponding position of the outer wall of the second straight pipe section provides pressure for the rubber sleeve 15 in the process of embedding the second rectifying component into the rubber sleeve 15, the rubber sleeve 15 is forced to be clamped between the inner wall of the duct and the outer wall of the second straight pipe section and generates compression deformation, and the processing capacity of the rubber sleeve 15 on the second straight pipe section is improved. The rubber sleeve 15, the second straight pipe joint and the inlet connecting pipe are coaxial and aim to limit the relative positions of the three parts, so as to realize: in the process of embedding the second rectifying component into the duct, the embedding direction of the second rectifying component is guided so as to ensure the installation accuracy of the rectifying component and improve the coaxiality of the air channel and the sound channel.
Example 3:
this example was further refined on the basis of example 1:
the rubber sleeve 15 comprises an equal-diameter section 17 and a bell mouth section 18, and the outer diameter values of all positions of the rubber sleeve 15 are equal;
on the equal diameter section 17, the inner diameter values of the rubber sleeve 15 at all positions are equal;
the end of the flare section 18, which is used for being connected with the equal-diameter section 17, is the position with the largest inner diameter of the flare section 18, and the value of the inner diameter at the position with the largest inner diameter is equal to the value of the inner diameter of the equal-diameter section 17;
on the flare section 18, from the maximum inner diameter position to the free end of the flare section 18, the inner diameter of the flare section 18 decreases linearly;
the end of the rubber sleeve 15 with the bell mouth section 18 is the end of the rubber sleeve 15 penetrating into the pore canal;
the pore diameter values of all the positions of the pore canal are equal, and the pore diameter values are equal to the outer diameter values of the rubber sleeve 15;
the outer diameter value of each position of the second straight pipe section is equal, and the outer diameter value of the second straight pipe section is equal to the inner diameter value of the equal-diameter section 17;
the second straight tube section is partially embedded in the flare section 18. The technical scheme aims at providing the technical scheme which not only can simplify the structural design of the inlet connecting pipe, but also is convenient for the installation of the second rectifying component. Specifically, the shape of the duct on the inlet connection pipe for configuring the second rectifying component is consistent with the shape of the rubber sleeve 15: the whole rubber sleeve 15 is the constant diameter post, the pore canal section that the import takeover was used for installing the rubber sleeve 15 is the constant diameter hole, the internal diameter of constant diameter hole is unanimous with the external diameter of constant diameter post, when the installation, firstly, put into the import takeover with the rubber sleeve 15, and the one end that the rubber sleeve 15 set up constant diameter section 17 is the outer end of rubber sleeve 15, afterwards, guide into the rubber sleeve 15 with the second straight tube festival, accomplish the embedding of second rectifying component to ultrasonic flowmeter, along with the second straight tube festival gets into horn mouth section 18, the rubber sleeve 15 of relevant position is compressed, in this way, utilize the rubber sleeve 15 of compressive deformation not only can increase the damping when outer sleeve 14 shakes, the horn mouth section 18 that the hole is the horn mouth also can be used to the direction of movement direction of outer sleeve 14 simultaneously, so this scheme is not only a second rectifying component simple to install scheme, simultaneously for the technical scheme that utilizes rubber sleeve 15 can ensure the acoustic channel and outer sleeve 14 axiality.
Example 4:
this example was further refined on the basis of example 1:
the pore canal comprises a step Kong Duanyi and a straight-through hole section, wherein the outlet end of the step hole section is in butt joint with the inlet end of the straight-through hole section, the outlet end of the straight-through hole section is in butt joint with the sound channel of the flowmeter body 1, and the pore diameters of all positions of the straight-through hole section are consistent;
the second rectifying component is mounted on the step Kong Duanzhong, and the inner end surface of the second connecting flange 16 is attached to the step surface on the step hole section. As a person skilled in the art, the second straight pipe section and the second connecting flange 16 are formed as a structural body of stepped shaft-like shape, the above stepped hole section being adapted to the shape of the structural body for mounting the structural body, the through hole Duan Jieshou being for gas from the second rectifying assembly, which gas is introduced to the sound channel through the through hole section. The inside terminal surface that further sets up to second flange 16 in this scheme pastes with the step face on the step hole section, aims at limiting the concrete mounted position of second rectifier module on import joint pipe axis for to: at the time of ultrasonic meter verification, the second fairing assembly is installed in the ultrasonic meter in a unique manner on the inlet nipple axis, and the step surface is used to indicate the installation location of the second attachment flange 16 on the inlet nipple axis so that the second fairing assembly can be installed at a particular inlet nipple axis location.
Example 5:
this example was further refined on the basis of example 4:
the rectifying component comprises a blade rectifying component 11 and a honeycomb rectifying component 13, wherein the blade rectifying component 11 is arranged at one end of the second straight pipe section, which is provided with a second connecting flange 16, and the honeycomb rectifying component 13 is arranged at one end of the second straight pipe section, which is deep into a pore canal;
the axis of the honeycomb fairing assembly 13 is collinear with the axis of the through bore section, and the outside diameter of the honeycomb fairing assembly 13 is equal to the outside diameter of the through bore section. The present solution provides a specific implementation manner of the rectifying component, as a person skilled in the art, the honeycomb rectifying component 13 is a rectifying component having a plurality of stabilizing holes along the axial direction of the honeycomb rectifying component 13 thereon, the cross section of a single stabilizing hole may be set to be regular hexagon or other shapes, the stabilizing holes are uniformly distributed on the cross section of the honeycomb rectifying component 13, the fluid enters each stabilizing hole after being baffled by the vane rectifying component 11, and the fluid enters the sound channel of the ultrasonic flowmeter through the through hole section. The honeycomb rectifying assembly 13 may also be considered as a tube bundle rectifier. The outer diameter of the honeycomb rectifying component 13 is equal to that of the straight through hole section, so that the honeycomb rectifying component 13 can be used for uniformly controlling the uniformity of flow fields at all positions of the cross section of the straight through hole section.
Example 6:
this example was further refined on the basis of example 4:
the inner end surface of the second connecting flange 16 is a conical surface, and the step surface has a shape consistent with the shape of the inner end surface. In this scheme, the inboard terminal surface is the one end that second flange 16 and import take over step face subsides promptly, sets up to be the conical surface, aims at realizing: in the process of fastening the connecting bolts, the axial position of the second connecting flange 16 can be automatically adjusted by utilizing the mutually matched conical surfaces so as to ensure the installation accuracy of the second rectifying component. In particular, the axis of the conical surface on the step surface is arranged to be collinear with the axis of the inlet connection pipe of the flowmeter body.
Example 7:
this example was further refined on the basis of example 4:
the second straight pipe section comprises a connecting cylinder 12 and an outer sleeve 14, the connecting cylinder 12 is arranged at one end of a second connecting flange 16 and forms an integrated structure with the second connecting flange 16, and the outer sleeve 14 is arranged at one end of the connecting cylinder 12 far away from the second connecting flange 16;
the integral structure is made of metal, and the outer sleeve 14 is made of engineering plastic;
the front end of the honeycomb rectifying component 13 is embedded into the connecting cylinder 12 and is welded with the connecting cylinder 12, and the rear end of the honeycomb rectifying component 13 is embedded into the outer sleeve 14 and is connected with the inner wall of the outer sleeve 14;
the contact point of the rubber sleeve 15 on the second straight tube section is located partly or entirely on the outer sleeve 14. In this scheme, set up to connecting cylinder 12 and second flange 16 structure as an organic whole, aim at providing a simple structure, convenient processing and the second straight tube festival structural style of manufacturing to provide the tube coupling of suitable length and be used for installing blade rectifying component 11 and honeycomb rectifying component 13. The integral structure is made of metal, and the honeycomb rectifying component 13 is welded with the connecting cylinder 12, so that the honeycomb rectifying component 13 is matched with a stainless steel structural member generally, and the aim of strengthening the connection strength of the honeycomb rectifying component 13 and the second straight pipe section is fulfilled; compared with the method of adopting metal tubes to encapsulate the honeycomb rectifying component 13 or forming the boundary of the fluid flow path on the honeycomb rectifying component 13, the method is characterized in that the method further comprises the step of arranging the outer sleeve 14 made of engineering plastic, compared with the step of adopting metal tubes to encapsulate the honeycomb rectifying component 13 or forming the boundary of the fluid flow path on the honeycomb rectifying component 13, the thicker outer sleeve 14 can ensure the rigidity of the second straight tube section so as to reduce the vibration of the boundary of the flow path under the action of air flow, and simultaneously can reduce the weight of the second straight tube section and strengthen the friction force between the outer sleeve 14 and the rubber sleeve 15 by utilizing the smooth outer sleeve 14. In some embodiments, when an ultrasonic flow meter is used for gas flow measurement with small temperature changes (e.g., less than 30℃.), the second straight tube section may be entirely constructed of engineered plastic tubing, saving material while avoiding loosening of the honeycomb fairing assembly 13.
Example 8:
this example was further refined on the basis of example 1:
and further comprises a first straight pipe section 2 for interfacing with an inlet nipple of the flowmeter body 1. The solution aims at length compensation with the first straight tube section 2 for achieving: under the condition that the appearance length of the flowmeter body 1 is designed to be a standard value, when the flowmeter is installed on a pipeline, the first straight pipe section 2 is in butt joint with the flowmeter body 1, and an ultrasonic flowmeter which accords with the installation space length of the flowmeter on the current pipeline is configured by utilizing the length of the first straight pipe section 2.
Still further, still include first rectifying component, first rectifying component includes first straight tube coupling 2, still install filter screen 5 in the first straight tube coupling 2. The scheme aims at realizing: if the rectifying component includes the honeycomb rectifying component 13, the performance of the honeycomb rectifying component 13 is sensitive to dirt and impurities attached to the honeycomb rectifying component, the first rectifying component is configured by utilizing the first pipe joint 2 under the condition of having the first pipe joint 2, the above filter screen 5 not only can play a role of an orifice plate rectifier to uniformly flow field, but also can reduce the possibility that dirt is attached to the second rectifying component which is closer to a sound channel, the impurity is blocked or even damaged due to the shielding of the filter screen 5 because the filter screen 5 is positioned at the front stage of the second rectifying component, so that the accuracy of the ultrasonic flowmeter is more slowly attenuated in the use process. For real-time supervision filter screen 5 jam condition to the suggestion is maintained filter screen 5, sets up to: the first straight pipe section 2 is also provided with two pressure taking holes 21;
defining a filter screen 5 to divide the first straight pipe section 2 into an air inlet side and an air outlet side;
the orifice of one pressure taking hole 21 is positioned on the air inlet side, and the orifice of the other pressure taking hole 21 is positioned on the air outlet side.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and it is not intended that the invention be limited to these descriptions. Other embodiments of the invention, which are apparent to those skilled in the art to which the invention pertains without departing from its technical scope, shall be covered by the protection scope of the invention.
Claims (10)
1. The ultrasonic flowmeter beneficial to interchangeability comprises a flowmeter body (1) and a second rectifying component arranged in the flowmeter body (1), wherein the second rectifying component is arranged in a pore canal of an inlet connecting pipe of the flowmeter body (1), and the ultrasonic flowmeter is characterized in that the second rectifying component comprises a second straight pipe joint and a rectifying component arranged in the second straight pipe joint, one end of the second straight pipe joint is provided with a second connecting flange (16), and the second connecting flange (16) is fixed at the position of an orifice of the inlet connecting pipe through a connecting bolt;
the device further comprises a rubber sleeve (15), and the rubber sleeve (15) is clamped between the pore wall of the pore canal and the outer wall of the second straight pipe section.
2. The ultrasonic flow meter facilitating interchangeability according to claim 1, wherein the rubber sleeve (15) is compressed at each position in the circumferential direction, and the rubber sleeve (15), the second straight pipe section, and the inlet connection pipe are coaxial.
3. The ultrasonic flowmeter of claim 1, wherein the rubber sleeve (15) comprises an equal diameter section (17) and a flare section (18), and the outer diameter values of the rubber sleeve (15) at each position are equal;
on the equal diameter section (17), the inner diameter values of the rubber sleeve (15) at all positions are equal;
the horn mouth section (18) is used for connecting with the equal-diameter section (17), one end of the horn mouth section (18) is at the position with the largest inner diameter, and the value of the inner diameter at the position with the largest inner diameter is equal to the value of the inner diameter of the equal-diameter section (17);
on the flare section (18), from the position of maximum inner diameter to the free end of the flare section (18), the value of the inner diameter of the flare section (18) decreases linearly;
one end of the rubber sleeve (15) with the horn mouth section (18) is one end of the rubber sleeve (15) penetrating into the pore canal;
the pore diameter values of all the positions of the pore canal are equal, and the pore diameter values are equal to the outer diameter values of the rubber sleeve (15);
the outer diameter value of each position of the second straight pipe section is equal, and the outer diameter value of the second straight pipe section is equal to the inner diameter value of the equal-diameter section (17);
the second straight tube section is partially embedded in the flare section (18).
4. The ultrasonic flow meter facilitating interchangeability according to claim 1, wherein the duct comprises a step Kong Duanyi and a through hole section, an outlet end of the step hole section being butted against an inlet end of the through hole section, an outlet end of the through hole section being butted against a sound channel of the flow meter body (1), an aperture of each position of the through hole section being identical;
the second rectifying component is arranged on the step Kong Duanzhong, and the inner side end surface of the second connecting flange (16) is attached to the step surface on the step hole section.
5. The ultrasonic flowmeter of claim 4, wherein the rectifying assembly comprises a blade rectifying assembly (11) and a honeycomb rectifying assembly (13), the blade rectifying assembly (11) is mounted at one end of the second straight pipe section where the second connecting flange (16) is arranged, and the honeycomb rectifying assembly (13) is arranged at one end of the second straight pipe section where the second straight pipe section goes deep into the hole;
the axis of the honeycomb rectifying component (13) is collinear with the axis of the through hole section, and the outer diameter of the honeycomb rectifying component (13) is equal to the outer diameter of the through hole section.
6. The ultrasonic flow meter of claim 4, wherein the inner end surface of the second connecting flange (16) is a tapered surface and the step surface is shaped to conform to the shape of the inner end surface.
7. The ultrasonic flow meter of claim 5, wherein the second straight tube section comprises a connecting tube (12) and an outer sleeve (14), the connecting tube (12) being disposed at one end of the second connecting flange (16) and forming an integral structure with the second connecting flange (16), the outer sleeve (14) being disposed at an end of the connecting tube (12) remote from the second connecting flange (16);
the integrated structure is made of metal, and the outer sleeve (14) is made of engineering plastic;
the front end of the honeycomb rectifying component (13) is embedded into the connecting cylinder (12) and is welded with the connecting cylinder (12), and the rear end of the honeycomb rectifying component (13) is embedded into the outer sleeve (14) and is connected with the inner wall of the outer sleeve (14);
the contact point of the rubber sleeve (15) on the second straight pipe joint is partially or completely positioned on the outer sleeve (14).
8. The ultrasonic flow meter facilitating interchangeability according to claim 1, further comprising a first straight tube section (2) for interfacing with an inlet nipple of the flow meter body (1).
9. The ultrasonic flow meter for facilitating interchangeability according to claim 8, further comprising a first fairing assembly comprising the first straight tube section (2), a screen (5) being further installed in the first straight tube section (2).
10. The ultrasonic flowmeter of claim 9, wherein the first straight pipe section (2) is further provided with two pressure-taking holes (21);
defining a filter screen (5) to divide the first straight pipe joint (2) into an air inlet side and an air outlet side;
wherein the orifice of one pressure taking hole (21) is positioned on the air inlet side, and the orifice of the other pressure taking hole (21) is positioned on the air outlet side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310552421.4A CN116678458A (en) | 2023-05-16 | 2023-05-16 | Ultrasonic flowmeter facilitating interchangeability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310552421.4A CN116678458A (en) | 2023-05-16 | 2023-05-16 | Ultrasonic flowmeter facilitating interchangeability |
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| Publication Number | Publication Date |
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| CN116678458A true CN116678458A (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310552421.4A Pending CN116678458A (en) | 2023-05-16 | 2023-05-16 | Ultrasonic flowmeter facilitating interchangeability |
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| Country | Link |
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| CN (1) | CN116678458A (en) |
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- 2023-05-16 CN CN202310552421.4A patent/CN116678458A/en active Pending
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