CN210221153U - Throttle type flow measuring device of throat pressure-taking long-neck nozzle - Google Patents
Throttle type flow measuring device of throat pressure-taking long-neck nozzle Download PDFInfo
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- CN210221153U CN210221153U CN201921412454.4U CN201921412454U CN210221153U CN 210221153 U CN210221153 U CN 210221153U CN 201921412454 U CN201921412454 U CN 201921412454U CN 210221153 U CN210221153 U CN 210221153U
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- flow measuring
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Abstract
The utility model relates to a throat gets and presses long neck nozzle throttle formula flow measuring device, including nozzle (6), the inside of pipeline (1) is arranged in nozzle (6), nozzle (6) are connected with pipeline (1) are spacing, with getting of pipeline (1) the same material press pipe (4) with pipeline (1) welding and the inside of entering nozzle (6). Compared with the prior art, avoid throat to get the inside xenogenesis steel welded structure of pressure long neck nozzle completely, rely on the physical connection mode between the part, the reliability is high, and it is big to connect area of contact, and the part wearing and tearing probability of droing is little.
Description
Technical Field
The utility model belongs to the technical field of throttle formula flow measuring device technique and specifically relates to a throat gets and presses long neck nozzle throttle formula flow measuring device.
Background
Throttling flow measuring devices are one of the most widely used and long-standing flow measuring devices. The device has the characteristics of simple structure, reliable operation, strong universality and the like, and is widely applied to industries such as petroleum, chemical industry, electric power, metallurgy and the like. The principle of the method is that when fluid passes through a throttling device, a flow beam contracts, the flow speed is increased, the static pressure is reduced, pressure difference is generated before and after a throttling element, and the fluid flow is calculated by utilizing the numerical relation between the differential pressure value and the flow. The flow nozzle is an important one of throttling type flow measuring devices. The throat pressure-taking long-neck nozzle effectively avoids the disturbance influence of a fluid boundary layer due to the fact that the throat pressure-taking long-neck nozzle directly opens a hole to take pressure at the high-flow-speed nozzle throat, and becomes a precise flow measuring device in a high-temperature, high-pressure and high-Reynolds-number fluid environment. The ASME flow nozzle which is widely popularized in ASME standards issued by the American society of mechanical Engineers is a throat pressure-taking long-neck nozzle.
The nozzle part of the throat pressure-taking long-neck nozzle generally uses stainless steel materials, the pipeline part generally uses low alloy steel materials for maintaining the reliability of welding installation, the physical and chemical property difference of the two materials is large, and in addition, the pipe wall is thick, so that great difficulty is brought to welding. At present, in order to solve the problem, main research focuses on innovations of welding materials and welding processes, but the reliability of dissimilar steel welding in a high-temperature and high-pressure fluid measurement environment is difficult to guarantee, and a welding structure of dissimilar steel used in a pressure pipeline does not meet safety specifications.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a throat gets pressure long neck nozzle throttle formula flow measuring device in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a throttle type flow measuring device of a throat pressure-taking long-neck nozzle comprises a nozzle, wherein the nozzle is arranged in a pipeline and is in limited connection with the pipeline, and a pressure-taking pipe made of the same material as the pipeline is welded with the pipeline and enters the nozzle.
The inner wall of the pipeline is provided with a first limiting body.
The first limiting body is a boss surrounding the inner wall.
The outer wall of the nozzle is provided with a second limiting body, and the second limiting body is connected with the first limiting body in a limiting mode.
The second limiting body is a groove corresponding to the first limiting body.
The pressure tapping pipe is an alloy steel pressure tapping pipe.
The pressure sampling pipe is in butt welding with the pipeline and enters the nozzle.
The pressure sampling pipe enters the nozzle through the throat pressure sampling hole.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the heterogeneous steel welding structure of the throat part inside the pressure-taking long-neck nozzle is completely avoided, the parts are connected in a physical connection mode, the reliability is high, the connection contact area is large, and the part abrasion and falling probability is small.
(2) Use boss recess cooperation and the dual location connection structure that the pressure pipe link up of getting between pipeline and the nozzle for the part location is more accurate, and the axial displacement restraint is strengthened, can avoid or reduce the axial thrust that fluid throttle produced to the influence of measuring.
(3) The assembly method only needs to weld the outer wall of the pipeline, the whole installation process is simple, and the whole service life of the measuring device can be effectively prolonged due to the structure without dissimilar steel welding.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the welding of the outer wall of the pipeline according to the present invention;
reference numerals:
1 is a pipeline; 2 is a boss; 3 is a groove; 4 is a pressure tapping pipe; 5 is a throat pressure measuring hole; and 6 is a nozzle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in fig. 1 and fig. 2, the present embodiment provides a throat pressure-taking long-neck nozzle throttling type flow measuring device, which includes a nozzle 6 disposed inside a pipe 1, the nozzle 6 is connected to the pipe 1 in a limiting manner, and a pressure-taking pipe 4 made of the same material as the pipe 1 is welded to the pipe 1 and enters the nozzle 6. The assembly method only needs to weld the outer wall of the pipeline 1, the whole installation process is simple, the whole service life of the measuring device can be effectively prolonged due to the fact that a structure welded by dissimilar steel does not exist, the parts are connected in a physical connection mode, the reliability is high, the connection contact area is large, and the probability of abrasion and falling of the parts is small.
The following are specific descriptions:
the inner wall of the pipeline 1 is provided with a first limiting body which is a boss 2 surrounding the inner wall, the width of the boss 2 is 150mm-250mm, and the height of the boss is 3mm-10 mm.
The outer wall of the nozzle 6 is provided with a second limiting body, the second limiting body is in limiting connection with the first limiting body, the second limiting body is a groove 3 corresponding to the first limiting body, the groove 3 is sunken by 3.1mm-10.1mm, the width is 150.1mm-250.1mm, and an assembly gap of 0.1mm is reserved.
After finishing the aperture of the throat pressure taking hole 5 of the pipeline 1 and the nozzle 6, the pressure taking pipe 4 with the wall thickness of 2mm-3mm is made of the same material as the pipeline 1, the pipeline 1 and the nozzle 6 are communicated, the same material welding reinforcement is finished on the outer wall of the pipeline 1 in a butt welding mode, the pressure taking pipe 4 is made of alloy steel, and the pressure taking pipe 4 enters the nozzle 6 through the throat pressure taking hole 5.
The dual-positioning connection structure that boss 2 grooves 3 are matched and pressure tapping pipe 4 is communicated is used between the pipeline 1 and the nozzle 6, so that the component is positioned more accurately, the axial displacement constraint is strengthened, and the influence of the axial thrust generated by fluid throttling on measurement can be avoided or reduced.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (8)
1. A throttle type flow measuring device of a throat pressure-taking long-neck nozzle comprises a nozzle (6), wherein the nozzle (6) is arranged inside a pipeline (1), the throttle type flow measuring device is characterized in that the nozzle (6) is in limit connection with the pipeline (1), and a pressure-taking pipe (4) made of the same material as the pipeline (1) is welded with the pipeline (1) and enters the nozzle (6).
2. A throat pressure tapping long neck nozzle throttling flow measuring device according to claim 1, characterized in that the inner wall of the pipe (1) is provided with a first limiting body.
3. A throat pressure tapping long neck nozzle throttling flow measuring device according to claim 2, wherein said first limiting body is a boss (2) surrounding the inner wall.
4. The throttle type flow measuring device of the throat pressure-taking long-neck nozzle according to claim 2, characterized in that a second limiting body is arranged on the outer wall of the nozzle (6), and the second limiting body is in limiting connection with the first limiting body.
5. The throttling flow measuring device of the throat pressure-taking long-neck nozzle according to claim 4, wherein the second limiting body is a groove (3) corresponding to the first limiting body.
6. A throat pressure tapping long neck nozzle throttling flow measuring device according to claim 1, characterized in that said pressure tapping pipe (4) is an alloy steel pressure tapping pipe.
7. A throat pressure tapping long neck nozzle throttling flow measuring device according to claim 1, characterized in that said pressure tapping pipe (4) is butt welded to said pipe (1) and enters the interior of the nozzle (6).
8. A throat pressure tapping long neck nozzle throttling flow measuring device according to claim 1, characterized in that the pressure tapping pipe (4) enters the interior of the nozzle (6) through the throat pressure tapping hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921412454.4U CN210221153U (en) | 2019-08-28 | 2019-08-28 | Throttle type flow measuring device of throat pressure-taking long-neck nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921412454.4U CN210221153U (en) | 2019-08-28 | 2019-08-28 | Throttle type flow measuring device of throat pressure-taking long-neck nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210221153U true CN210221153U (en) | 2020-03-31 |
Family
ID=69920585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921412454.4U Expired - Fee Related CN210221153U (en) | 2019-08-28 | 2019-08-28 | Throttle type flow measuring device of throat pressure-taking long-neck nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210221153U (en) |
-
2019
- 2019-08-28 CN CN201921412454.4U patent/CN210221153U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |