CN212158707U - Ultra-large-diameter ultrasonic flowmeter - Google Patents

Abstract

The utility model discloses an ultra-large-diameter ultrasonic flowmeter, wherein an outer pipe is sleeved outside an inner pipe and is fixed relative to the position of the inner pipe, and a pair of corresponding discrete block groups are respectively positioned at two sides of an annular cavity; each discrete block group comprises a plurality of discrete blocks, mounting holes are formed in the discrete blocks, the transducers are fixedly mounted in the mounting holes, and the transducers in each pair of discrete block groups are in one-to-one correspondence. The utility model discloses discrete block group includes a plurality of discrete blocks, and the quantity of transducer in the flowmeter can be changed through increasing or reducing the quantity of discrete block, and need not to die sinking inside lining and outer tube again, has solved current large-bore ultrasonic flowmeter increase and decrease and install the problem poor to transducer adaptability; the discrete block groups are annular or arc-shaped, the outer pipe and the inner pipe can use a universal circular pipe, and the transducer mounting shell does not need to be processed and arranged on the outer pipe, so that the processing is simple; the inner liner or the discrete block group can be directly fixed by the inner pipe, the outer pipe and the connecting part, and the problem that the inner liner and the outer pipe are complex to install is solved.

Description

Ultra-large-diameter ultrasonic flowmeter

Technical Field

The application relates to an ultra-large-diameter ultrasonic flowmeter

Background

For ultrasonic flowmeters with large calibers (DN300 and above), especially ultra-large calibers (DN 1200 for example), the transducers can be installed and fixed only by adopting a mode that a flowmeter tube body is welded with a transducer seat. The number of transducer welding installation seats which can be arranged is extremely limited, and the welding process is complicated (easy to deform and lose the accuracy of pairing straight lines). If a small-caliber ultrasonic flowmeter is adopted to integrally segment the lining, and the transducer is arranged on the lining, when the caliber is large, the injection molding difficulty of the lining is increased, the cost is high, or the performance cannot be effectively realized (the injection molding lining is required to have high precision and size). Meanwhile, if the number of transducers of the ultrasonic flow meter needs to be adjusted according to different application scenarios (flow measurement or precision measurement), the mold of the liner needs to be opened again, which wastes time and cost. Moreover, the installation and fixation steps of the existing inner lining and the outer pipe are complicated, and the production efficiency is also influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the application provides an ultra-large-diameter ultrasonic flowmeter, which solves the problem that the application adaptability is poor due to the fact that the existing large-diameter ultrasonic flowmeter transducer seat needs welding modes and the number of transducers cannot be more arranged or flexibly adjusted, and also solves the problems that the installation and fixing steps of the lining, the inner pipe and the outer pipe are simplified, and the inner pipe and the outer pipe are integrally welded with the flange at one time, so that the production cost of the previous transducer installation mode is greatly reduced.

Ultra-large caliber ultrasonic flowmeter, including: the outer pipe is sleeved outside the inner pipe and fixed relative to the inner pipe, an annular cavity is formed between the outer pipe and the inner pipe, and the corresponding pair of discrete block groups are respectively positioned on two sides of the annular cavity; each discrete block group comprises a plurality of discrete blocks, mounting holes are formed in the discrete blocks, the transducers are fixedly mounted in the mounting holes, and the transducers in each pair of discrete block groups are in one-to-one correspondence.

Preferably, the discrete block groups are annular or arc-shaped, and two adjacent discrete blocks of the same discrete block group are fixed in position.

Preferably, the discrete block is arc-shaped and is provided with a fixed column; the inner tube is formed with a plurality of first inner tube fixed orifices, and the fixed column of branch founds the piece inserts in the first inner tube fixed orifices.

Preferably, the inner tube is formed with a transducer hole, and the transducer passes through the mounting hole and the transducer hole in this order.

Preferably, a first fixing plate is formed on one side of the separating block, and a second fixing plate is formed on the other side of the separating block; the first fixing plate is provided with fixing columns, the second fixing plate is provided with fixing holes, and the fixing columns of the two adjacent independent blocks penetrate through the fixing holes.

Preferably, a circuit assembly is arranged in the middle of the annular cavity and comprises a base, an integrating circuit board and a cover, the integrating circuit board is fixedly installed in the base, the cover is arranged above the base and fixedly connected with the base, and a first through hole is formed in the upper portion of the cover;

the base is provided with a wire inlet groove, a wire inlet bulge is formed below the cover and inserted into the wire inlet groove, and a lead-out wire of the energy converter penetrates through the wire inlet groove and a gap between the wire inlet bulge and the wire inlet groove, penetrates into the base and is electrically connected with the totalized circuit board;

a base fixing column is formed below the base, a second inner tube fixing hole is formed in the inner tube, and the base fixing column is inserted into the base fixing column.

Preferably, the pressure-resistant gauge also comprises a gauge head, the outer pipe is provided with an outer pipe hole, a connecting pipe of the gauge head is arranged above the outer pipe hole and is fixedly connected with the outer pipe, the lower part of the inner part of the connecting pipe is fixedly connected with a rubber baffle, the rubber baffle is provided with a second through hole, the upper part of the inner part of the connecting pipe is fixedly connected with a pressure-resistant external thread steel ring, and the pressure-resistant external thread steel ring is provided with a third through hole; an output line of the integrating circuit board sequentially passes through the first through hole, the second through hole and the third through hole to be connected with the gauge head; and sealant is poured between the base and the cover, and the sealant is poured between the rubber baffle plate and the pressure-resistant external thread steel ring.

Preferably, still include connecting portion, the outer tube both ends are provided with connecting portion respectively, outer tube and connecting portion fixed connection, inner tube and connecting portion fixed connection.

Preferably, a pair of discrete block groups and/or a pair of discrete block groups and a connecting part are provided with a fixing ring, the fixing ring fixes the discrete block groups relative to the outer tube in the axial direction, the discrete block groups or the fixing ring is fixedly connected with the connecting part, and the discrete block groups and the fixing ring are fixedly connected.

Preferably, the fixing ring between the pair of discrete block groups comprises a fixing block, a circuit block used for installing the integrating circuit board and a wire slot block, the middle part of the fixing ring is a first ring body formed by the circuit block and the wire slot block, the two sides of the fixing ring are second ring bodies formed by the fixing blocks, and the first ring body is fixedly connected with the second ring bodies.

The utility model has the advantages of as follows: the discrete block group comprises a plurality of discrete blocks, the number of the transducers in the flowmeter can be changed by increasing or reducing the number of the discrete blocks, so that the large-caliber flowmeter can select and install any number of transducers according to application scenes and requirements, the inner lining and the outer pipe do not need to be opened again, and the problem of poor adaptability caused by the fact that the number of the transducers of the conventional large-caliber ultrasonic flowmeter cannot be adjusted is solved; the transducer, the transducer connecting wire and the built-in integrating circuit (only a chip and the like have no display screen) are subjected to strict waterproof bubble treatment (the circuit board is plated with Parylene/Parylene firstly, then is sealed by strong A, B waterproof glue with the thickness of 12mm, and only one power supply and data four-core wire are output) discrete block groups are in a ring shape or an arc shape, so that the outer pipe and the inner pipe can use circular pipes without processing a shell capable of accommodating a mounting seat of the transducer on the outer pipe, the processing is simple, and the cost is saved; need not carry out waterproof sealing between inner tube and the outer tube and handle, inside lining or discrete block group can be directly by the inner tube, outer tube and connecting portion are fixed, have solved the loaded down with trivial details problem of the fixed step of installation of inside lining and outer tube, inside and outside pipe and flange are fixed to the frock, become an organic whole by laser rapid welding, and is very succinct, safety, save production time promptly and reduction in production cost again (laser welding's speed is about 2.5 meters/minute, the welding seam is very narrow, belong to cold welding, non-deformable, do not need to do the solid processing of melting to the welding member).

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1: the utility model discloses a first embodiment's main view structure sketch map;

FIG. 2: the utility model discloses a side-looking schematic structural diagram of embodiment one;

FIG. 3: the utility model discloses a section structure sketch map of sectioning at A department of embodiment one;

FIG. 4: the utility model discloses a sectional structure sketch map of sectioning in B department of embodiment one;

FIG. 5: the utility model discloses a sectional structure sketch map of sectioning at C department of embodiment one;

FIG. 6: the utility model discloses embodiment one local enlarged structure sketch map at D department;

FIG. 7: the utility model discloses a local enlarged structure sketch map at E department of embodiment one;

FIG. 8: the utility model discloses a local enlarged structure sketch map at F department of embodiment one;

FIG. 9: the utility model discloses the spatial structure sketch map (overlooking visual angle) of the discrete piece of embodiment one;

FIG. 10: the utility model discloses a three-dimensional structure sketch map (upward viewing angle) of discrete piece of embodiment one;

FIG. 11: the utility model discloses a three-dimensional structure sketch map of discrete block group and circuit assembly of embodiment one;

FIG. 12: the second embodiment of the present invention is a schematic sectional structure diagram;

FIG. 13: the second embodiment of the present invention is a schematic three-dimensional structure of the ring body lining;

FIG. 14: the utility model discloses embodiment two is in the spatial structure sketch map of G department;

FIG. 15: the utility model discloses the discrete block group of embodiment two and the three-dimensional structure schematic diagram of circuit assembly;

FIG. 16: the cross-sectional structure of the transducer of the utility model is schematic;

FIG. 17: the three-dimensional structure schematic diagram of the transducer of the utility model;

FIG. 18: the utility model discloses a three-dimensional structure schematic diagram of a transducer compact heap;

FIG. 19: the explosion structure of the energy converter of the utility model is schematically shown;

FIG. 20: the utility model discloses a sectional structure schematic diagram of transducer shell.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The first embodiment is as follows:

as shown in fig. 1 to 11 and fig. 16 to 20, the present embodiment provides an ultra large caliber ultrasonic flow meter including: the outer pipe 1 is sleeved on the outer side of the inner pipe 2 and is fixed relative to the inner pipe 2, an annular cavity is formed between the outer pipe 1 and the inner pipe 2, and the corresponding pair of discrete block groups are respectively positioned on two sides of the annular cavity; each discrete block group comprises a plurality of discrete blocks 4, mounting holes 41 are formed in the discrete blocks 4, the transducers 8 are fixedly mounted in the mounting holes 41, and the transducers 8 in each pair of discrete block groups are in one-to-one correspondence. The corresponding pair of discrete block groups each contain the same number of discrete blocks 4.

Preferably, the discrete block groups are annular or arc-shaped, and the positions of two adjacent discrete blocks 4 of the same discrete block group are fixed.

Preferably, the discrete block 4 is arc-shaped, and a fixed column 45 is formed on the discrete block 4; the inner pipe 2 is formed with a plurality of first inner pipe fixing holes 22, and fixing posts 45 of the discrete block 4 are inserted into the first inner pipe fixing holes 22.

Preferably, the inner tube 2 is formed with a transducer hole 21, and the transducer 8 passes through the mounting hole 41 and the transducer hole 21 in sequence.

Preferably, the inner tube 2 is formed with an outlet groove 42, the outlet groove 42 communicates with the mounting hole 41, and the outlet of the transducer 8 is provided in the outlet groove 42.

Preferably, a circuit assembly 5 is arranged in the middle of the annular cavity, the circuit assembly 5 includes a base 51, an integrating circuit board 52 and a cover 53, the integrating circuit board 52 is fixedly installed inside the base 51, the cover 53 is above the base 51 and is fixedly connected with the base 51, and a first through hole is formed above the cover 53;

the base 51 is provided with a wire inlet slot 511, a wire inlet protrusion 521 is formed below the cover 53, the wire inlet protrusion 521 is inserted into the wire inlet slot 511, and an outgoing wire of the transducer 8 penetrates through the gap between the wire inlet slot 511 and the wire inlet protrusion 521, penetrates into the base 51 and is electrically connected with the totalized circuit board 52;

a plurality of base fixing posts 512 are formed below the base 51, the inner tube 2 is formed with second inner tube fixing holes 23, and the base fixing posts 512 are inserted into the base fixing posts 512.

Preferably, the pressure-resistant gauge also comprises a gauge head 6, the outer tube 1 is provided with an outer tube hole 11, a connecting tube of the gauge head 6 is arranged above the outer tube hole 11 and is fixedly connected with the outer tube 1, the lower part of the inner part of the connecting tube is fixedly connected with a rubber baffle plate 71, the rubber baffle plate 71 is provided with a second through hole, the upper part of the inner part of the connecting tube is fixedly connected with a pressure-resistant external thread steel ring 72, and the pressure-resistant external thread steel ring 72 is provided with a third through hole; the output line of the integrating circuit board 52 passes through the first through hole, the second through hole and the third through hole in sequence to be connected with an electronic element (such as a display) in the gauge head 6; sealant is filled between the base 51 and the cover 53, the sealant is filled between the rubber baffle plate 71 and the pressure-resistant external thread steel ring 72, and the pressure-resistant external thread steel ring 72 plays a role in bearing pressure.

Preferably, still include connecting portion 3, outer tube 1 both ends are provided with connecting portion 3 respectively, outer tube 1 and connecting portion 3 fixed connection, inner tube 2 and connecting portion 3 fixed connection. Preferably, the connection part 3 is a flange, the connection part 3 is formed with a first installation groove 31 and a second installation groove 32, the outer tube 1 is inserted into the first installation groove 31 and fixed with the connection part 3 by laser welding, and the inner tube 2 is inserted into the second installation groove 32 and fixed with the connection part 3 by laser welding.

The structure of the transducer 8 is as follows:

the mounting hole 41 is a through hole. The transducer 8 comprises a transducer ceramic plate 82 and a transducer circuit board 83, wherein the transducer ceramic plate 82 is electrically connected with the transducer circuit board 83. The transducer 8 further comprises a transducer shell 84, a shell blind hole 84c is formed in the transducer shell 84, a blind hole limiting protrusion 84b is formed on the bottom surface of the shell blind hole 84c, the transducer ceramic piece 82 is pushed into the shell blind hole 84c after glue is injected to the bottom surface of the shell blind hole 84c until the transducer ceramic piece 82 is contacted with the blind hole limiting protrusion 84b, only glue exists between the transducer ceramic piece 82 and the bottom surface of the shell blind hole 84c at the moment, a transducer front glue layer 81 is formed after the glue is dried, and the transducer ceramic piece 82 and the bottom surface of the shell blind hole 84c are bonded and fixed by the transducer front glue layer 81. The thickness of the transducer front glue layer 81 is the same as the height of the blind hole limiting protrusion 84 b. The transducer circuit board 83 is fixedly mounted in the housing blind hole 84 c. After the leading-out wire of the transducer circuit board 83 penetrates through the shell blind hole 84c, glue is sealed on the outer side of the transducer circuit board 83, the glue is dried to form transducer rear-sealing glue 87, the shell blind hole 84c is separated from the outside through the transducer rear-sealing glue 87, and the leading-out wire of the transducer circuit board 83 penetrates through the transducer rear-sealing glue 87. Preferably, before the transducer circuit board 83 is sealed with the adhesive, the lead-out wire is led out of the housing blind hole 84c and then led through the first lead-out hole 851 of the transducer cover 85, then the adhesive is sealed, the transducer cover 85 is inserted into the transducer housing 84 before the adhesive is dried, and the transducer cover 85 is bonded and fixed with the transducer housing 84 by the transducer back-sealing adhesive 87. The outgoing line of the transducer circuit board 83 and the output line of the integrating circuit board 52 are waterproof lines.

The mounting hole 41 is formed with a step, and the transducer housing 84 is formed with an enlarged portion 84 a. The transducer housing 84 is inserted into the mounting hole 41, and the enlarged portion 84a comes into contact with the step, which restricts the movement of the enlarged portion 84a toward the inside of the discrete block 4. The transducer hold-down block 86 is arranged between the transducer shell 84 and the outer tube 1 and used for tightly holding down the transducer shell 84, the transducer hold-down block 86 is matched with the inner wall of the outer tube 1, and after the discrete block 4 enters the outer tube 1, the transducer hold-down block 86 is fixed relative to the outer tube 1. Preferably, a positioning protrusion 863 is formed below the transducer hold-down block 86, and a positioning step 841 is formed at the transducer housing 84 and/or the transducer cover 85, the positioning protrusion 863 being inserted into the positioning step 841 to restrict the transducer housing 84 from rotating relative to the transducer hold-down block 86. The face of the top end of transducer hold-down block 86 is in mating contact with outer tube 1, thereby limiting rotation of transducer hold-down block 86 relative to outer tube 1. The transducer pressing block 86 is formed with a second through hole 861 and a wiring slot 862 (if necessary, the transducer cover 85 may also be formed with a slot through which a lead wire passes, and the slot is adapted to the wiring slot 862), the lead wire of the transducer circuit board 83 sequentially passes through the first through hole 851, the second through hole 861 and the wiring slot 862 and then enters the wire outlet slot 42, passes through the wire outlet slot 42 and then sequentially passes through the annular cavity and the wiring slot 511 and enters the interior of the base 51 and is electrically connected with the integrated circuit board 52, the output wire of the integrated circuit board 52 sequentially passes through the first through hole of the cover (53) upward, and then the sealant is poured on the integrated circuit board 52 and the cover 53 is mounted on the integrated circuit board 52. At this time, the incoming protrusion 521 is inserted into the incoming groove 511 and contacts the outgoing line, and the sealant fills and seals the gap between the outgoing line and the incoming groove 511 and the incoming protrusion 521, thereby sealing the space between the base 51 and the cover 53. The insertion of the inlet protrusion 521 into the inlet slot 511 not only provides a sealing function, but also provides a positioning function between the cover 53 and the base 51. The sealant seals the first through hole.

Preferably, a sealing ring is disposed between the enlarged portion 84a and the step for preventing water. The integral transducer 8 may be preassembled and the transducer 8 inserted directly during assembly of the flowmeter. The outer tube 1 and the step are both contacted with the transducer 8, so that the transducer 8 can be limited.

The above is but one alternative form of fixing of the transducer 8 relative to the outer tube 1 and the discrete block 4. The transducer housing 84 may also be formed with a protrusion on its own and the mounting hole 41 formed with a slot adapted to it, thereby restricting the transducer housing 84 from rotating relative to the mounting hole 41 while restricting the transducer housing 84 from moving inwardly of the discrete block 4. If the enlarged portion 84a is made of a non-rotational body (e.g., the cross section of the enlarged portion 84a changes from circular to rectangular), the above description can be satisfied. The transducer cover 85 may directly contact the inner wall of the outer tube 1 to limit the movement of the transducer housing 84 toward the outer tube 1.

If the mounting hole 41 is a blind hole. The integrally packaged transducer described above may also be mounted with the bottom surface of the transducer housing 84 in contact with the bottom surface of the transducer mounting hole 221 or bonded by glue, and the transducer housing 84 is fixed in position relative to the transducer mounting hole 221. The mounting holes 41 are blind holes and conventional packaged transducers may be used.

The working principle is as follows:

the first fixing form of the discrete block 4 is as follows:

as shown in fig. 8 to 10, the divided block 4 is arc-shaped, a first fixing plate 43 is formed above one side of the divided block 4, and a second fixing plate 44 is formed below the other side (the upper and lower of this section are based on fig. 8); the first fixing plate 43 is formed with fixing posts 45, the second fixing plate 44 is formed with fixing holes 46, and the fixing posts 45 of two adjacent discrete blocks 4 of the same discrete block set pass through the fixing holes 46. Preferably, the first fixing plate 43 and the second fixing plate 44 of two adjacent divided blocks 4 are in contact.

Preferably, the inner tube 2 is formed with a first inner tube fixing hole 22, and the fixing post 45 is inserted into the first inner tube fixing hole 22.

During assembly, the fixing column 45 of the first discrete block 4 is inserted into the first inner tube fixing hole 22, and the outer diameter of the fixing column 45 is the same as the inner diameter of the fixing hole 22. The fixing column 45 of the second discrete block 4 is simultaneously inserted into the fixing hole 46 of the first discrete block 4 and the corresponding fixing hole 22, the fixing column 45 of the third discrete block 4 is simultaneously inserted into the fixing hole 46 of the second discrete block 4 and the corresponding fixing hole 22 … …, and so on, and the fixing column 45 of the last discrete block 4 is simultaneously inserted into the fixing hole 46 of the penultimate discrete block 4 and the corresponding fixing hole 22, so that the installation of an arc-shaped structure of a discrete block group is completed.

The split block 4 in an arc structure limits the axial movement and the circumferential movement of the split block 4 relative to the inner pipe 2 by inserting the fixing column 45 into the fixing hole 22; the divided blocks 4 are restricted from rotating around the fixing column 45 by inserting the fixing column 45 into the fixing hole 46 of the adjacent divided block 4; thereby limiting the relative position between the discrete blocks 22 and the position of the discrete block 4 relative to the inner tube 2, further achieving the fixation of the position of the transducer 8 with the inner tube 2, and ensuring that the corresponding transducers 8 of different discrete block groups are positioned on the same straight line.

A discrete block set may contain a plurality of arc structures formed by discrete blocks 4, as shown in fig. 8, and a discrete block set in fig. 8 includes two arc structures formed by discrete blocks 4, and the two arc structures are located on the same ring.

The partition block 4 is fixed in a second form:

the separating blocks 4 are arc-shaped, a first fixing plate 43 is formed above one side of each separating block 4, and a second fixing plate 44 is formed below the other side of each separating block 4; the first fixing plate 43 is formed with a first fixing hole, the second fixing plate 44 is formed with a fixing hole 46, and the first fixing holes of two adjacent discrete blocks 4 of the same discrete block group coincide with the fixing hole 46. Preferably, the first fixing plate 43 and the second fixing plate 44 of two adjacent divided blocks 4 are in contact.

Preferably, the inner tube 2 is formed with a first inner tube fixing hole 22, and a fixing pin or screw is inserted into the first inner tube fixing hole 22 through the first fixing hole and the fixing hole 46.

The three fixing forms of the discrete blocks 4 are as follows:

the discrete block 4 is arc-shaped, a fixing column 45 is formed below the discrete block 4, and the fixing column 45 is inserted into the first inner pipe fixing hole 22. The fixing column 45 is a column body with a non-circular section, the first inner pipe fixing hole 22 is not a circular hole, and the size and the area of the section of the fixing column 45 are the same as those of the section of the first inner pipe fixing hole 22. The insertion of the fixing post 45 into the first inner pipe fixing hole 22 restricts the axial movement and the circumferential movement of the discrete block 4 relative to the inner pipe 2, while restricting the rotation of the discrete block 4 about the fixing post 45. Adjacent discrete blocks 4 in a discrete block group do not need to be contacted, and the position among the discrete blocks 4 can be ensured to be fixed. A discrete block set may be a ring or several arcs.

The fixing form of the discrete block 4 is four:

the discrete block 4 is arc-shaped, a plurality of fixing columns 45 are formed below one discrete block 4, and the fixing columns 45 are respectively inserted into the corresponding first inner tube fixing holes 22. The insertion of the fixing post 45 into the first inner pipe fixing hole 22 restricts the axial movement and the circumferential movement of the discrete block 4 relative to the inner pipe 2, while restricting the rotation of the discrete block 4 about the fixing post 45. Adjacent discrete blocks 4 in a discrete block group do not need to be contacted, and the position among the discrete blocks 4 can be ensured to be fixed. A discrete block set may be a ring or several arcs.

The above fixed form of the plurality of discrete blocks 4 can be used to install a desired number of discrete blocks 8 as required to achieve a desired number of transducers 8 in the flow meter.

The discrete block 4 and the circuit assembly 5 are both waterproof structures, so that the outer diameter of the portion of the transducer housing 84 inserted into the transducer hole 21, which is a through-hole, is smaller than the inner diameter of the transducer hole 21. That is, the waterproof treatment between the outer tube 1 and the inner tube 2 is not required, so that the cost of the overall waterproof treatment between the outer tube 1 and the inner tube 2 is reduced, and the waterproof treatment for the first inner tube fixing hole 22 is not required. And the outer pipe 1 and the inner pipe 2 are both round pipes, so that the production and processing speed is high and the cost is low.

A plurality of pairs of discrete block sets may be installed in the outer tube 1 and the inner tube 2, as shown in fig. 11, a pair of discrete block sets may be added in the existing pair of discrete block sets adapted in fig. 11, and a distance between the transducers 8 corresponding to the newly added pair of discrete block sets is smaller than a distance between the transducers 8 corresponding to the original pair of discrete block sets.

Example two:

as shown in fig. 12 to 20, the present embodiment provides an ultra large caliber ultrasonic flow meter including: the outer pipe 1 is sleeved on the outer side of the inner pipe 2 and is fixed relative to the inner pipe 2, an annular cavity is formed between the outer pipe 1 and the inner pipe 2, and the corresponding pair of discrete block groups are respectively positioned on two sides of the annular cavity; each discrete block group comprises a plurality of discrete blocks 4, the discrete blocks 4 are fixed relative to the inner pipe 2, mounting holes 41 are formed in the discrete blocks 4, the transducers 8 are fixedly mounted in the mounting holes 41, the transducers 8 in each discrete block group are in one-to-one correspondence, and the corresponding transducers 8 are on the same axis. The corresponding pair of discrete block groups each contain the same number of discrete blocks 4.

Preferably, the discrete block groups are annular or arc-shaped, and the positions of two adjacent discrete blocks 4 of the same discrete block group are fixed.

Preferably, still include connecting portion 3, outer tube 1 both ends are provided with connecting portion 3 respectively, outer tube 1 and connecting portion 3 fixed connection, inner tube 2 and connecting portion 3 fixed connection. Preferably, the connection part 3 is a flange, the connection part 3 is formed with a first installation groove 31 and a second installation groove 32, the outer tube 1 is inserted into the first installation groove 31 and fixed with the connection part 3 by laser welding, and the inner tube 2 is inserted into the second installation groove 32 and fixed with the connection part 3 by laser welding.

Preferably, be provided with solid fixed ring between a pair of discrete block group and/or discrete block group and connecting portion 3, gu fixed ring will be the relative outer tube 1 axial fixity of discrete block group, discrete block group or solid fixed ring and connecting portion 3 fixed connection, discrete block group and solid fixed ring fixed connection.

Preferably, the fixing ring between the pair of discrete block groups comprises a fixing block 91, a circuit block 92 for mounting the integrated circuit board and a slot block 93, the middle part of the fixing ring is a first ring body formed by the circuit block 92 and the slot block 93, the two sides of the fixing ring are second ring bodies formed by the fixing block 91, and the first ring body is fixedly connected with the second ring bodies.

The discrete block 4, the fixed block 91, the circuit block 92 and the line slot block 93 are all blocks with the same size and radian, and each block is provided with a protrusion and a slot. All the adjacent blocks between the outer pipe 1 and the inner pipe 1 are fixed in position by inserting the protrusions into the grooves. All the blocks form an integral annular liner, two ends of the integral annular liner are respectively contacted with the inner sides of the connecting parts 3, and the connecting parts 3 at two ends limit the axial movement of the integral annular liner relative to the outer pipe 1. Then, a joint block groove or a joint block protrusion is formed inside the joint block 3, and the joint block groove or the joint block protrusion is engaged with a projection or a groove of the block body which the joint block 3 contacts, thereby restricting the ring body liner from rotating axially with respect to the outer tube 1 (the groove and projection of fig. 12 and 15 are not shown). In this way, the fixation of the position of the ring liner with respect to the outer tube 1, the inner tube 2 and the connecting portion 3 is completed, so that the position between the transducers 8 is relatively fixed, and there is no need to open the inner tube 2 for the fixation of the divided blocks.

The fixing block 91 is formed with an axial slot, and the slot block 93 is formed with a circumferential slot. When one slot block 93 is adjacent to the other two slot blocks 93, the circumferential slot of the slot block 93 is not communicated with the circumferential slot of at least one adjacent slot block 93 (i.e. an interrupted gap is formed); the outgoing line of the energy converter 8 passes through the outgoing line groove of the discrete block 4 and then passes through the axial line grooves of the plurality of fixed blocks 91, turns to the gap interrupted among the circumferential line grooves to enter the circumferential line grooves, and enters the circuit block 92 along the circumferential line grooves to be electrically connected with the integrated circuit board of the circuit block 92. The integrated circuit board of the circuit block 92 is provided with a waterproof structure or measure.

The structure and principle of the transducer 8 of the embodiment are the same as those of the first embodiment, and the lead wires and other wires are waterproof wires.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. Ultra-large-caliber ultrasonic flowmeter is characterized by comprising: the outer pipe (1) is sleeved on the outer side of the inner pipe (2) and is fixed relative to the inner pipe (2), an annular cavity is formed between the outer pipe (1) and the inner pipe (2), and the corresponding pair of discrete block groups are respectively positioned on two sides of the annular cavity; each discrete block group comprises a plurality of discrete blocks (4), mounting holes (41) are formed in the discrete blocks (4), the transducers (8) are fixedly mounted in the mounting holes (41), and the transducers (8) in each discrete block group correspond to one another one by one.

2. The ultra large caliber ultrasonic flow meter of claim 1, wherein: the discrete block groups are annular or arc-shaped, and the positions of two adjacent discrete blocks (4) of the same discrete block group are fixed.

3. The ultra large caliber ultrasonic flow meter of claim 2, wherein: the separating blocks (4) are arc-shaped, and fixing columns (45) are formed on the separating blocks (4); the inner pipe (2) is provided with a plurality of first inner pipe fixing holes (22), and fixing columns (45) of the separating blocks (4) are inserted into the first inner pipe fixing holes (22).

4. The ultra large caliber ultrasonic flow meter of claim 1, wherein: the inner tube (2) is formed with transducer hole (21), and transducer (8) pass mounting hole (41) and transducer hole (21) in proper order.

5. The ultra large caliber ultrasonic flow meter of claim 3, wherein: a first fixing plate (43) is formed on one side of the separating block (4), and a second fixing plate (44) is formed on the other side of the separating block; the first fixing plate (43) is provided with fixing columns (45), the second fixing plate (44) is provided with fixing holes (46), and the fixing columns (45) of two adjacent separated blocks (4) penetrate through the fixing holes (46).

6. The ultra large caliber ultrasonic flow meter of claim 5, wherein: the middle part of the annular cavity is provided with a circuit assembly (5), the circuit assembly (5) comprises a base (51), an integrating circuit board (52) and a cover (53), the integrating circuit board (52) is fixedly installed inside the base (51), the cover (53) is arranged above the base (51) and is fixedly connected with the base (51), and a first through hole is formed in the upper part of the cover (53);

the base (51) is provided with a wire inlet groove (511), a wire inlet bulge (521) is formed below the cover (53), the wire inlet bulge (521) is inserted into the wire inlet groove (511), and an outgoing wire of the transducer (8) penetrates through the wire inlet groove (511) and a gap between the wire inlet bulge (521) to penetrate into the base (51) and is electrically connected with the totalized circuit board (52);

a base fixing column (512) is formed below the base (51), a second inner tube fixing hole (23) is formed in the inner tube (2), and the base fixing column (512) is inserted into the base fixing column (512).

7. The ultra large caliber ultrasonic flow meter of claim 6, wherein: the pressure-resistant external thread steel ring is characterized by further comprising a meter head (6), an external pipe hole (11) is formed in the outer pipe (1), a connecting pipe of the meter head (6) is arranged above the external pipe hole (11) and fixedly connected with the outer pipe (1), the lower portion of the inner portion of the connecting pipe is fixedly connected with a rubber baffle plate (71), a second through hole is formed in the rubber baffle plate (71), the upper portion of the inner portion of the connecting pipe is fixedly connected with a pressure-resistant external thread steel ring (72), and a third through hole is formed in the pressure-resistant external thread steel ring (72); an output line of the integrating circuit board (52) sequentially passes through the first through hole, the second through hole and the third through hole to be connected with the gauge head (6); sealant is filled between the base (51) and the cover (53), and the sealant is filled between the rubber baffle plate (71) and the pressure-resistant external thread steel ring (72).

8. The ultra large caliber ultrasonic flow meter of claim 2, wherein: still include connecting portion (3), outer tube (1) both ends are provided with connecting portion (3) respectively, outer tube (1) and connecting portion (3) fixed connection, inner tube (2) and connecting portion (3) fixed connection.

9. An ultra-large caliber ultrasonic flow meter according to claim 8, wherein: be provided with solid fixed ring between a pair of discrete block group and/or between discrete block group and connecting portion (3), gu fixed ring will be the relative outer tube of discrete block group (1) axial fixity, discrete block group or solid fixed ring and connecting portion (3) fixed connection, discrete block group and solid fixed ring fixed connection.

10. The ultra large caliber ultrasonic flow meter of claim 9, wherein: the fixing ring between the pair of discrete block groups comprises a fixing block (91), a circuit block (92) used for installing an integrating circuit board and a wire slot block (93), the middle part of the fixing ring is a first ring body formed by the circuit block (92) and the wire slot block (93), the two sides of the fixing ring are second ring bodies formed by the fixing block (91), and the first ring body is fixedly connected with the second ring bodies.

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