CN118050057A - V-cone flowmeter - Google Patents
V-cone flowmeter Download PDFInfo
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- CN118050057A CN118050057A CN202410427303.5A CN202410427303A CN118050057A CN 118050057 A CN118050057 A CN 118050057A CN 202410427303 A CN202410427303 A CN 202410427303A CN 118050057 A CN118050057 A CN 118050057A
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- pipe section
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- 238000001514 detection method Methods 0.000 claims abstract description 52
- 238000004891 communication Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 abstract description 17
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
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Abstract
The invention relates to the technical field of fluid flow measurement, in particular to a V-cone flowmeter, which comprises a pipeline, wherein the V-cone flowmeter comprises a detection pipe section and two fixed pipe sections, the detection pipe section is detachably connected between the two fixed pipe sections, one ends of the fixed pipe sections, which are far away from the detection pipe section, are provided with flanges, and each fixed pipe section is also provided with a plugging structure which is used for plugging the inner cavity of the fixed pipe section when the detection pipe section is taken down; the detection pipe section is provided with a low-pressure taking pipe and a high-pressure taking pipe arranged at the downstream of the low-pressure taking pipe, the high-pressure taking pipe extends into the detection pipe section, the downstream of the high-pressure taking pipe is also connected with a V-shaped cone, and the axis of the V-shaped cone is parallel to or coincides with the axis of the detection pipe section. When the V-cone flowmeter is used, the low-pressure taking pipe, the high-pressure taking pipe or the V-cone in the detection pipe section can be maintained without emptying fluid, and meanwhile, the waste of the fluid is reduced, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of fluid flow measurement, in particular to a V-cone flowmeter.
Background
The V-cone flowmeter is a novel differential pressure flowmeter that utilizes the throttling effect of the V-cone in the flow field to measure flow.
The Chinese patent document with the publication number CN108955784B discloses a V-cone flowmeter with a bionic microstructure on the surface, and the flow resistance is reduced and the pressure loss is reduced by arranging the microstructure on the V-cone.
When the pipeline is used, two ends of the pipeline are connected to the position to be tested through the flange, but when the low-pressure taking pipe, the high-pressure taking pipe or the V-shaped cone in the pipeline is damaged, the flange is required to be disconnected from the position to be tested, so that the pipeline is taken down, and fluid at two ends of the position to be tested is required to be emptied in advance when the pipeline is taken down, which is troublesome; and the fluid is discharged automatically after the pipeline is taken down, so that a great amount of fluid is wasted easily.
Disclosure of Invention
The invention provides a V-cone flowmeter, which aims to solve the technical problems that in the prior art, when a V-cone flowmeter pipeline is taken down, fluid treatment is troublesome and more waste exists.
In order to solve the problems, the V-cone flowmeter provided by the invention adopts the following technical scheme:
A V-cone flowmeter, comprising:
The pipeline comprises a detection pipe section and two fixed pipe sections, wherein the detection pipe section is detachably connected between the two fixed pipe sections, flanges are arranged at one ends of the fixed pipe sections, which are far away from the detection pipe sections, and plugging structures are arranged on the fixed pipe sections and used for plugging the inner cavities of the fixed pipe sections when the detection pipe sections are taken down; the detection pipe section is provided with a low-pressure taking pipe and a high-pressure taking pipe arranged at the downstream of the low-pressure taking pipe, the high-pressure taking pipe extends into the detection pipe section, the downstream of the high-pressure taking pipe is also connected with a V-shaped cone, and the axis of the V-shaped cone is parallel to or coincides with the axis of the detection pipe section.
The beneficial effects are that: when the V-cone flowmeter is used, when the low-pressure taking pipe, the high-pressure taking pipe or the V-cone in the detection pipe section needs to be maintained, the inner cavity of the fixed pipe section is plugged through the plugging structure, and then the detection pipe section is taken down from between the two fixed pipe sections, so that the low-pressure taking pipe, the high-pressure taking pipe or the V-cone in the detection pipe section is maintained. When the V-cone flowmeter is used, fluid is blocked through the blocking structure, and the detection pipe section is detachably connected between the two fixed pipe sections, so that the low-pressure taking pipe, the high-pressure taking pipe or the V-cone in the detection pipe section can be maintained without emptying the fluid, meanwhile, only a small amount of fluid in the detection pipe section can be wasted, a large amount of fluid is not wasted, and the cost is reduced.
Further, the plugging structure comprises a rotary groove formed in the fixed pipe section and a plugging piece rotationally assembled in the rotary groove, wherein the plugging piece comprises a communication annular plate, a plugging plate and a connecting plate for connecting the communication annular plate and the plugging plate together, and the inner diameter of the communication annular plate and the plugging plate are matched with the inner diameter of the fixed pipe section.
The beneficial effects are that: simple structure, convenient operation.
Further, the shutoff structure is still including locating the fixed plate on the fixed pipe section, has seted up first rotation hole and first spacing hole on the fixed plate, set up on the connecting plate with first rotation hole coaxial second rotation hole, with first spacing hole coaxial second spacing hole, first rotation hole and second rotation downthehole coaxial dwang that is equipped with, the both ends of dwang all are equipped with the screw thread section, and equal threaded connection has the rotation nut on the screw thread section of dwang, first spacing hole and second spacing downthehole coaxial spacing pole that is equipped with, the both ends of spacing pole also all are equipped with the screw thread section, equal threaded connection has the stop nut on the screw thread section of spacing pole.
The beneficial effects are that: the plugging piece is convenient to fix during detection or plugging, so that fluid waste or influence on the fluid flow rate of the inner cavity is avoided.
Further, a sliding groove is formed in the fixed pipe section, the sliding groove is arranged on one side, close to the detection pipe section, of the rotary groove, the sliding groove comprises a first annular groove section, a sliding hole and a second annular groove section, the second annular groove section is arranged on one side, close to the detection pipe section, of the first annular groove section at intervals, the first annular groove section is separated from an inner cavity of the fixed pipe section, the second annular groove section is communicated with the inner cavity of the fixed pipe section, the sliding hole is formed between the first annular groove section and the second annular groove section, and the first annular groove section is communicated with the second annular groove section; the sliding groove is provided with a sliding part in a sliding manner, and the sliding part comprises a first sliding plate section which is in sliding fit with the first annular groove section, a second sliding plate section which is in sliding fit with the second annular groove section and a connecting rod section which is in sliding fit with the sliding hole and connects the first sliding plate section and the second sliding plate section together; the two ends of the detection pipe section are provided with connecting grooves which are matched with the second sliding plate section and can be limited in the circumferential direction, and the length of the connecting grooves along the axis direction of the pipeline is smaller than that of the second sliding plate section along the axis direction of the pipeline.
The beneficial effects are that: the operation is simple, and the detection pipe section can be fixed between the two fixed pipe sections only by sliding the sliding piece.
Further, a plurality of clamping grooves are formed in the circumferential direction of the second sliding plate section, and a plurality of clamping blocks which are in one-to-one correspondence with the clamping grooves are arranged in the connecting grooves.
The beneficial effects are that: prevent to detect the rotation of pipeline section, guarantee the stability when detecting.
Further, the detection pipe section is also provided with a sliding long hole extending along the radial direction of the detection pipe section, and the sliding long hole is communicated with the first annular groove section; the first sliding plate section is connected with a moving plate which is assembled in the sliding slot hole in a sliding manner along the axis direction of the detection pipe section.
The beneficial effects are that: the sliding piece can be slid only by pushing and pulling the moving plate, and the operation is convenient.
Further, the moving plate radially extends out of the sliding long hole along the detection pipe section, a third rotating hole is formed in the part, extending out of the sliding long hole, of the moving plate, the third rotating hole is a threaded hole, and a threaded section of the rotating rod is in threaded connection with the third rotating hole; the rotating nuts are clung to the corresponding fixing plates or connecting plates.
The beneficial effects are that: the movable plate is moved by rotating the rotating rod, so that the sliding piece is moved, and meanwhile, the sliding piece can be fixed through threaded connection, so that the stability of connection between the detection pipe section and the fixed pipe section is ensured.
Further, a plurality of pressure guiding holes are formed in one end, far away from the high-pressure taking pipe, of the V-shaped cone.
The beneficial effects are that: prevent that dirt from blocking up V-arrangement cone and high pressure tube, guarantee that high pressure tube measures accurately.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the invention are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic view of a V-cone flowmeter according to the present invention;
FIG. 2 is a cross-sectional view of a V-cone flowmeter of the present invention;
FIG. 3 is a cross-sectional view of a V-cone flowmeter according to the present invention;
FIG. 4 is a cross-sectional view III of a V-cone flowmeter of the present invention;
FIG. 5 is a schematic view of the slider of a V-cone flowmeter according to the present invention;
FIG. 6 is an exploded view of a V-cone flowmeter according to the present invention;
FIG. 7 is an enlarged schematic view of FIG. 6 at A;
fig. 8 is an exploded cross-sectional view of a V-cone flowmeter according to the present invention.
Reference numerals illustrate:
1. Detecting a pipe section; 2. fixing the pipe section; 3. a flange; 4. a low pressure take-off tube; 5. a high-pressure taking pipe; 6. a V-shaped cone; 7. a rotary groove; 8. a communicating ring plate; 9. a plugging plate; 10. a connecting plate; 11. a fixing plate; 12. a first rotation hole; 13. a first limiting hole; 14. a second rotation hole; 15. a second limiting hole; 16. a first ring groove section; 17. a sliding hole; 18. a second ring groove section; 19. a first sliding plate segment; 20. a second sliding plate segment; 21. a connecting rod section; 22. a connecting groove; 23. a clamping groove; 24. a clamping block; 25. a sliding long hole; 26. a moving plate; 27. and a third rotation hole.
Detailed Description
The following description of the embodiments of the present invention will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Any number of elements in the figures are for illustration and not limitation, and any naming is used for distinction only and not for any limiting sense.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments thereof.
Example 1 of a V-cone flowmeter provided by the invention:
As shown in fig. 1 to 8, a V-cone flowmeter of the present invention includes a pipe, a slider, a low-pressure-taking pipe 4, a high-pressure-taking pipe 5, and a V-cone 6.
As shown in fig. 1,2 and 3, the pipeline comprises a detection pipe section 1 and two fixed pipe sections 2, wherein the detection pipe section 1 is detachably connected between the two fixed pipe sections 2, and flanges 3 are arranged at one ends of the fixed pipe sections 2, which are far away from the detection pipe section 1.
The detection pipe section 1 is provided with a low-pressure hole extending along the radial direction of the detection pipe section and a high-pressure hole arranged at the downstream of the low-pressure hole, the low-pressure taking pipe 4 is arranged in the low-pressure hole, the high-pressure taking pipe 5 is arranged in the high-pressure hole, the V-shaped cone 6 is connected to one side of the downstream of the high-pressure taking pipe 5, and meanwhile, one end of the V-shaped cone 6, far away from the high-pressure taking pipe 5, is provided with a plurality of pressure guiding holes.
The connecting grooves 22 communicated with the inner cavity of the detection pipe section 1 are formed in the two ends of the detection pipe section 1, eight clamping blocks 24 are arranged in the connecting grooves 22, and the eight clamping blocks 24 are uniformly distributed along the circumferential direction of the detection pipe section 1.
And each fixed pipe section 2 is also provided with a blocking structure, and the blocking structure comprises a rotary groove 7 formed in the fixed pipe section 2, blocking pieces rotationally assembled in the rotary groove 7 and a fixed plate 11. The fixed plate 11 is provided with a first rotating hole 12 and a first limiting hole 13.
As shown in fig. 4, the plugging member comprises a communication ring plate 8, a plugging plate 9 and a connecting plate 10 for connecting the communication ring plate 8 and the plugging plate 9 together, wherein the inner diameter of the communication ring plate 8 and the plugging plate 9 are matched with the inner diameter of the fixed pipe section 2.
As shown in fig. 6 and 7, the connection plate 10 is provided with a second rotation hole 14 coaxial with the first rotation hole 12 and a second limit hole 15 coaxial with the first limit hole 13. The first rotating hole 12 and the second rotating hole 14 are coaxially and rotatably provided with rotating rods, the two ends of each rotating rod are respectively provided with a threaded section, the two threaded sections of each rotating rod are respectively and spirally connected with rotating nuts, and the two rotating nuts are tightly attached to the fixing plate 11 and the connecting plate 10 on the corresponding side.
The first limiting hole 13 and the second limiting hole 15 are coaxially and rotatably provided with limiting rods, the two ends of each limiting rod are also provided with threaded sections, limiting nuts are connected to the two threaded sections of each limiting rod in a threaded mode, and the two limiting nuts are respectively clung to the fixing plate 11 and the connecting plate 10 on the corresponding side.
As shown in fig. 3 and 8, the fixed pipe section 2 is provided with a sliding groove, the sliding groove is arranged on one side of the rotating groove 7, which is close to the detecting pipe section 1, and the sliding groove comprises a first annular groove section 16, a sliding hole 17 and a second annular groove section 18, the second annular groove section 18 is arranged on one side of the first annular groove section 16, which is close to the pipeline, at intervals, the first annular groove section 16 is not communicated with the inner cavity of the pipeline, and the second annular groove section 18 is communicated with the inner cavity of the pipeline. The sliding holes 17 are formed between the first ring groove section 16 and the second ring groove section 18, and the first ring groove section 16 and the second ring groove section 18 are communicated, and eight sliding holes 17 are uniformly distributed along the circumferential direction of the fixed pipe section 2.
As shown in fig. 5, the slider comprises a first sliding plate section 19 slidably fitted in the first ring groove section 16, a second sliding plate section 20 slidably fitted in the second ring groove section 18, and a connecting rod section 21 slidably fitted in the sliding hole 17 and connecting the first sliding plate section 19 and the second sliding plate section 20 together.
The second sliding plate section 20 is matched with the connecting groove 22, clamping grooves 23 which are in one-to-one correspondence with the clamping blocks 24 and are matched with the connecting groove 22 are further formed in the second sliding plate section 20, and the length of the second sliding plate section 20 along the axis direction of the pipeline is larger than that of the connecting groove 22 along the axis direction of the pipeline.
In order to facilitate the adjustment of the position of the sliding piece by the staff, the detection pipe section 1 is also provided with a sliding long hole 25 extending along the radial direction of the detection pipe section, and the sliding long hole 25 is communicated with the first ring groove section 16; the first slide plate section 19 is connected to a moving plate 26 slidably fitted in the slide slot 25 in the axial direction of the test tube section 1.
In order to improve the stability of the fixed pipe section 2 when being connected with the detecting pipe section 1, the moving plate 26 extends to the outside of the sliding long hole 25 along the radial direction of the detecting pipe section 1, a third rotating hole 27 is formed in the part of the moving plate 26 extending to the outside of the sliding long hole 25, the third rotating hole 27 is a threaded hole, and the threaded section of the rotating rod is in threaded connection with the third rotating hole 27, so that the position of the sliding part is adjusted by rotating the rotating rod.
In this embodiment, the sealing members are disposed in the connecting groove 22 and the second ring groove.
When the V-cone flowmeter is used, the communicating ring plate 8 and the fixed pipe section 2 are coaxially arranged; when the detection pipe section 1 needs to be maintained, the limiting rod is firstly taken down, the blocking piece is rotated at the moment, the blocking plate 9 is coaxial with the fixed pipe section 2, the fixed pipe section 2 can be blocked by the blocking plate 9 at the moment, then the limiting rod is inserted into the corresponding first limiting hole 13 and the corresponding second limiting hole 15, the blocking piece is fixed, the rotating rod is rotated at the moment, the moving plate 26 is driven to move until the second sliding plate section 20 is completely separated from the connecting groove 22, and the detection pipe section 1 can be taken down for maintenance at the moment.
When the V-cone flowmeter is used, the V-cone flowmeter is convenient and quick, fluid does not need to be emptied in advance, fluid between the plugging plates is wasted, and accidents of loss and waste of a large amount of fluid are avoided.
Example 2 of a V-cone flowmeter provided by the present invention:
The differences from example 1 are mainly that: in the embodiment 1, both ends of the rotating rod are threaded sections, and the threaded sections of the rotating rod are connected with rotating nuts in a threaded manner; both ends of the limiting rod are threaded sections, and limiting nuts are connected to the threaded sections of the limiting rod in a threaded mode.
In this embodiment, the second rotation hole is a threaded hole, the second limiting hole is also a threaded hole, the rotation rod is rotatably assembled in the first rotation hole and is in threaded connection with the second rotation hole, the limiting rod is rotatably assembled in the first limiting hole and is in threaded connection with the second limiting hole, and when the sealing device is used, the limiting rod is firstly rotated out of the second limiting hole, and then the connecting plate is rotated until the sealing plate is coaxial with the fixed pipe section.
Example 3 of a V-cone flowmeter provided by the present invention:
The differences from example 1 are mainly that: in embodiment 1, a plurality of clamping grooves are formed in the circumferential direction of the second sliding plate section, and a plurality of clamping blocks corresponding to the clamping grooves one by one are arranged in the connecting grooves.
In this embodiment, a pin slot may be formed in the second sliding plate section, and a pin adapted to the pin slot is formed in the connecting slot, so that the rotation of the detecting pipe section during use is avoided.
Claims (8)
1. A V-cone flowmeter, comprising:
The pipeline comprises a detection pipe section and two fixed pipe sections, wherein the detection pipe section is detachably connected between the two fixed pipe sections, flanges are arranged at one ends of the fixed pipe sections, which are far away from the detection pipe sections, and plugging structures are arranged on the fixed pipe sections and used for plugging the inner cavities of the fixed pipe sections when the detection pipe sections are taken down;
The detection pipe section is provided with a low-pressure taking pipe and a high-pressure taking pipe arranged at the downstream of the low-pressure taking pipe, the high-pressure taking pipe extends into the detection pipe section, the downstream of the high-pressure taking pipe is also connected with a V-shaped cone, and the axis of the V-shaped cone is parallel to or coincides with the axis of the detection pipe section.
2. The V-cone flow meter according to claim 1, wherein the plugging structure comprises a rotary groove formed in the fixed pipe section and a plugging piece rotatably assembled in the rotary groove, the plugging piece comprises a communication ring plate, a plugging plate and a connecting plate connecting the communication ring plate and the plugging plate together, and the inner diameter of the communication ring plate and the plugging plate are both adapted to the inner diameter of the fixed pipe section.
3. The V-cone flowmeter according to claim 2, wherein the plugging structure further comprises a fixing plate arranged on the fixing pipe section, a first rotating hole and a first limiting hole are formed in the fixing plate, a second rotating hole coaxial with the first rotating hole and a second limiting hole coaxial with the first limiting hole are formed in the connecting plate, rotating rods are coaxially arranged in the first rotating hole and the second rotating hole, threaded sections are respectively arranged at two ends of the rotating rods, rotating nuts are respectively connected to the threaded sections of the rotating rods in a threaded mode, limiting rods are coaxially arranged in the first limiting hole and the second limiting hole, threaded sections are respectively arranged at two ends of the limiting rods, and limiting nuts are respectively connected to the threaded sections of the limiting rods in a threaded mode.
4. The V-cone flow meter according to claim 3, wherein the fixed pipe section is provided with a sliding groove, the sliding groove is arranged on one side of the rotating groove, which is close to the detecting pipe section, the sliding groove comprises a first ring groove section, a sliding hole and a second ring groove section, the second ring groove section is arranged on one side of the first ring groove section, which is close to the detecting pipe section, at intervals, the first ring groove section is separated from the inner cavity of the fixed pipe section, the second ring groove section is communicated with the inner cavity of the fixed pipe section, the sliding hole is arranged between the first ring groove section and the second ring groove section, and the first ring groove section is communicated with the second ring groove section;
The sliding groove is provided with a sliding part in a sliding manner, and the sliding part comprises a first sliding plate section which is in sliding fit with the first annular groove section, a second sliding plate section which is in sliding fit with the second annular groove section and a connecting rod section which is in sliding fit with the sliding hole and connects the first sliding plate section and the second sliding plate section together;
the two ends of the detection pipe section are provided with connecting grooves which are matched with the second sliding plate section and can be limited in the circumferential direction, and the length of the connecting grooves along the axis direction of the pipeline is smaller than that of the second sliding plate section along the axis direction of the pipeline.
5. The V-cone flowmeter of claim 4, wherein a plurality of clamping grooves are formed in the circumferential direction of the second sliding plate section, and a plurality of clamping blocks corresponding to the clamping grooves one by one are arranged in the connecting grooves.
6. The V-cone flow meter of claim 4 wherein the test tube section is further provided with a sliding slot extending radially therefrom, said sliding slot being in communication with the first ring groove section;
The first sliding plate section is connected with a moving plate which is assembled in the sliding slot hole in a sliding manner along the axis direction of the detection pipe section.
7. The V-cone flow meter according to claim 6, wherein the moving plate extends radially along the detecting pipe section to the outside of the sliding long hole, a third rotation hole is formed in a portion of the moving plate extending to the outside of the sliding long hole, the third rotation hole is a threaded hole, and the threaded section of the rotation rod is screwed in the third rotation hole;
the rotating nuts are clung to the corresponding fixing plates and connecting plates.
8. The V-cone flowmeter according to any one of claims 1-7, wherein said V-cone has a plurality of pressure introducing holes formed at an end thereof remote from said high pressure take-off tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410427303.5A CN118050057B (en) | 2024-04-10 | V-cone flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410427303.5A CN118050057B (en) | 2024-04-10 | V-cone flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118050057A true CN118050057A (en) | 2024-05-17 |
| CN118050057B CN118050057B (en) | 2024-07-02 |
Family
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010116952A (en) * | 2008-11-11 | 2010-05-27 | Cosmo Koki Co Ltd | Mounting/dismounting device for pipe connection member |
| CA2658150A1 (en) * | 2008-12-31 | 2010-06-30 | Dresser, Inc. | Fluid control valve |
| WO2016094524A1 (en) * | 2014-12-12 | 2016-06-16 | Daniel Measurement And Control, Inc. | Multi- double block and bleed system for an orifice fitting |
| CN107796450A (en) * | 2016-08-30 | 2018-03-13 | 牟绍林 | A kind of differential pressure flowmeter |
| NL2018493B1 (en) * | 2017-03-09 | 2018-09-21 | Shell Int Research | Orifice carrier flange |
| CN108955784A (en) * | 2018-06-12 | 2018-12-07 | 西安理工大学 | A kind of surface has the V cone flow meter of bionical micro-structure |
| CN110836301A (en) * | 2019-11-12 | 2020-02-25 | 缙云县源都自动化科技有限公司 | A capping structure for PVC pipeline afterbody |
| KR102450495B1 (en) * | 2022-03-15 | 2022-10-06 | 주식회사 대영방재산업 | Fire-fighting piping for flow measurement accuracy |
| CN220668768U (en) * | 2023-09-09 | 2024-03-26 | 吕荣俊 | Pipeline plugging device |
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010116952A (en) * | 2008-11-11 | 2010-05-27 | Cosmo Koki Co Ltd | Mounting/dismounting device for pipe connection member |
| CA2658150A1 (en) * | 2008-12-31 | 2010-06-30 | Dresser, Inc. | Fluid control valve |
| WO2016094524A1 (en) * | 2014-12-12 | 2016-06-16 | Daniel Measurement And Control, Inc. | Multi- double block and bleed system for an orifice fitting |
| CN107796450A (en) * | 2016-08-30 | 2018-03-13 | 牟绍林 | A kind of differential pressure flowmeter |
| NL2018493B1 (en) * | 2017-03-09 | 2018-09-21 | Shell Int Research | Orifice carrier flange |
| CN108955784A (en) * | 2018-06-12 | 2018-12-07 | 西安理工大学 | A kind of surface has the V cone flow meter of bionical micro-structure |
| CN110836301A (en) * | 2019-11-12 | 2020-02-25 | 缙云县源都自动化科技有限公司 | A capping structure for PVC pipeline afterbody |
| KR102450495B1 (en) * | 2022-03-15 | 2022-10-06 | 주식회사 대영방재산업 | Fire-fighting piping for flow measurement accuracy |
| CN220668768U (en) * | 2023-09-09 | 2024-03-26 | 吕荣俊 | Pipeline plugging device |
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