CN213336267U - Venturi tube - Google Patents
Venturi tube Download PDFInfo
- Publication number
- CN213336267U CN213336267U CN202021996181.5U CN202021996181U CN213336267U CN 213336267 U CN213336267 U CN 213336267U CN 202021996181 U CN202021996181 U CN 202021996181U CN 213336267 U CN213336267 U CN 213336267U
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- tube
- nested
- pipe
- venturi
- throat
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- 238000005259 measurement Methods 0.000 claims abstract description 14
- 210000000867 larynx Anatomy 0.000 claims description 39
- 238000003466 welding Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 7
- 230000011218 segmentation Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model discloses a venturi, venturi is the flow measurement meter pipe of nested formula, and flow measurement meter pipe includes the outer tube, sets up survey buret and the nested formula throat neck pipe of setting in the outer tube on the outer tube, is equipped with the registration arm of throat neck pipe respectively in the both sides of throat neck pipe. The nested flow measurement meter tube has the characteristics of simple and convenient processing and manufacturing, high technician efficiency, high structural strength, high temperature and high pressure resistance, high processing precision and the like.
Description
Technical Field
The utility model relates to a throttle measures technical field, concretely relates to venturi.
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.
Chinese patent 201921412454.4 discloses a throat pressure-tapping long-neck nozzle throttling flow measuring device, which comprises a nozzle, wherein the nozzle is arranged inside a pipeline, the nozzle is connected with the pipeline in a limiting manner, and a pressure tapping pipe made of the same material as the pipeline is welded with the pipeline and enters the nozzle. 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. However, the throat pressure-taking long-neck nozzle is provided with a section of annular necking on the inner wall of the outer pipe at the matching part of the throat pressure-taking long-neck nozzle and the outer pipe, and the structure is difficult to precisely machine the annular necking section in the pipeline for the longer outer pipe. The existing venturi measuring tube is mostly processed by using bar materials, and the processing and manufacturing method wastes time and labor and wastes materials, so that the venturi measuring tube is necessary to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a processing simple manufacture, convenient, skilled worker is efficient, structural strength is high, high temperature and high pressure resistant, nested formula flow measurement meter pipe that machining precision is high.
In order to achieve the above object, the technical scheme of the utility model is that a venturi is provided, venturi is the flow measurement meter pipe of nested formula, and the flow measurement meter pipe includes the outer tube, sets up survey buret and the nested formula larynx neck pipe of setting in the outer tube on the outer tube, is equipped with the registration arm of larynx neck pipe respectively in the both sides of larynx neck pipe. Through adopting the structure of the outer pipe built-in nested formula larynx neck pipe and registration arm, can greatly simplify venturi's manufacturing process and manufacturing cost because the small part can be made in segmentation to dress nested formula larynx neck pipe and registration arm, then with the small part suit in the outer pipe.
In order to facilitate sleeving of the nested laryngeal tube and the positioning tube in the outer tube and avoid rotation of the nested laryngeal tube and the positioning tube in the outer tube, the preferred technical scheme is that the inner wall of the outer tube is provided with an axial key groove, and the outer walls of the nested laryngeal tube and the positioning tube are provided with axial convex keys.
In order to obtain the flow velocity, namely the differential pressure, of fluid at different pipe diameter parts in the Venturi tube, the preferable technical scheme is that radial holes corresponding in position are respectively formed in the pipe wall of the outer pipe, the pipe wall of the nested type laryngeal neck pipe and the positioning pipe, the measuring pipe is inserted into the inner wall of the nested type laryngeal neck pipe and the inner wall of the positioning pipe through the pipe wall of the outer pipe, and the measuring pipe and the pipe wall of the outer pipe are welded together.
In order to fix the nested throat pipe and the positioning pipe in the outer pipe and avoid axial movement of the nested throat pipe and the positioning pipe, the preferable technical scheme is that one end of the positioning pipe is connected with the nested throat pipe through bonding or welding, a piston ring type retaining ring is arranged at the other end of the positioning pipe, and an outer ring of the piston ring type retaining ring is embedded into an annular groove in the inner wall of the outer pipe.
In order to facilitate the simplification of the connection structure between the outer tube and the nested larynx neck tube and the positioning tube, the outer tube can be firmly connected with the nested larynx neck tube and the positioning tube, and the further preferred technical scheme is that the outer tube, the nested larynx neck tube and the positioning tube are tightly nested together after being frozen through the outer tube to form an integral structure.
In order to make nested formula larynx neck pipe and registration arm have better high temperature resistant, high pressure resistant, the convenient characteristic of processing preparation, further preferred technical scheme still, outer tube, nested formula larynx neck pipe, registration arm, survey buret are seamless steel pipe, or nested formula larynx neck pipe and registration arm are the nylon tube, or nested formula larynx neck pipe and registration arm are the carbon fiber pipe.
In order to measure the flow and the flow speed of fluid at different pipe diameter parts conveniently, the nested throat pipe comprises a middle section with a small diameter and flaring sections at two sides.
In order to avoid the fluid resistance caused by the rough surface inside the Venturi tube, polytetrafluoroethylene plastic film layers are attached to the inner walls of the nested laryngeal tube and the positioning tube.
In order to facilitate the connection of the nested flow meter between the pipes through which the fluid flows, a preferred solution is to provide the outer pipe with connecting flanges at both ends.
The utility model has the advantages and the beneficial effects that: the nested flow measurement meter tube has the characteristics of simple and convenient processing and manufacturing, high technician efficiency, high structural strength, high temperature and high pressure resistance, high processing precision and the like. Because the nested throat pipe and the positioning pipe are arranged in the outer pipe, the outer pipe almost does not need excessive processing, only two mounting holes for measuring the pipe need to be processed, the nested throat pipe and the positioning pipe can adopt castings, or the nested throat pipe processed in sections and a pipe fitting without a technician can, thus, the processing amount of the pipe fitting can be reduced, and raw materials can be saved.
Drawings
FIG. 1 is a schematic view of the main sectional structure of the Venturi tube of the present invention;
fig. 2 is a side view of fig. 1.
In the figure: 1. an outer tube; 1.1, axial key groove; 2. a measurement tube; 3. nesting type larynx neck tube; 4. nesting type larynx neck tube; 5. an axial male key; 6. a radial bore; 7. a piston ring type retainer ring.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 2, the utility model relates to a venturi, venturi is the flow measurement meter pipe of nested formula, and the flow measurement meter pipe includes outer tube 1, sets up survey buret 2 and the nested formula larynx neck pipe 3 of setting in outer tube 1 on outer tube 1, is equipped with the nested formula larynx neck pipe 4 of larynx neck pipe respectively in the both sides of nested formula larynx neck pipe 3. Through adopting the structure of the built-in nested formula larynx neck pipe 3 of outer tube 1 and registration arm 4, can greatly simplify venturi's manufacturing process and manufacturing cost, because the segmentation of dress nested formula larynx neck pipe 3 and registration arm 4 can be made into the widget, then the segmentation is with the widget suit in outer tube 1.
In order to facilitate the suit of dress scarf joint formula larynx neck pipe 3 and registration arm 4 in outer tube 1 to avoid dress scarf joint formula larynx neck pipe 3 and registration arm 4 rotation in outer tube 1, the utility model discloses preferred embodiment is the inner wall of outer tube 1 is equipped with axial keyway 1.1, is equipped with axial convex key 5 at the outer wall of nested formula larynx neck pipe 3, registration arm 4.
In order to facilitate the fluid velocity of flow that obtains different pipe diameters positions in the venturi is pressure difference, the utility model discloses preferred embodiment still be equipped with the corresponding radial hole 6 in position on the pipe wall of outer tube 1, nested formula larynx neck pipe 3's the pipe wall and the registration arm 4 respectively, wherein survey buret 2 and insert nested formula larynx neck pipe 3's inner wall and registration arm 4's inner wall by the pipe wall of outer tube 1, and weld together between the pipe wall of surveying buret 2 and outer tube 1.
In order to facilitate fixing nested formula larynx neck pipe 3 and registration arm 4 in outer tube 1, avoid it to take place the axial float, the utility model discloses further preferred embodiment is, the one end of registration arm 4 is through bonding or welding interconnect with nested formula larynx neck pipe 3, is equipped with piston ring formula link ring 7 at the other end of registration arm 4, and piston ring formula link ring 7's outer loop is embedded into to the ring channel of outer tube 1 inner wall.
In order to facilitate simplifying the connection structure between outer tube 1 and nested formula larynx neck pipe 3, the registration arm 4, can make simultaneously outer tube 1 and nested formula larynx neck pipe 3, firmly link together between the registration arm 4 again, the utility model discloses further preferred embodiment still, closely nested constitution overall structure together after outer tube 1 and nested formula larynx neck pipe 3, registration arm 4 pass through outer tube 1 heating nested formula larynx neck pipe 3 and the registration arm 4 is frozen.
In order to make nested formula larynx neck pipe 3 and registration arm 4 have better high temperature resistant, high pressure resistant, the convenient characteristic of processing preparation, the utility model discloses further preferred embodiment still, outer tube 1, nested formula larynx neck pipe 3, registration arm 4, survey buret 2 are seamless steel pipe, or nested formula larynx neck pipe 3 is the nylon tube with registration arm 4, or nested formula larynx neck pipe 3 is the carbon fiber pipe with registration arm 4.
In order to facilitate the measurement of the flow and the flow velocity of fluid at different pipe diameter positions, the utility model discloses preferred embodiment still has, nested formula larynx neck pipe 3 includes middle section 3.1 and the both sides flaring section 3.2 of thin footpath.
In order to avoid the fluid resistance caused by the rough surface inside the Venturi tube, a polytetrafluoroethylene plastic film layer (not shown in the figure) is attached to the inner walls of the nested laryngeal tube 3 and the positioning tube 4.
In order to facilitate the connection of the nested flow meter between the pipes through which the fluid flows, a preferred embodiment of the invention also provides that the outer pipe 1 is provided with connecting flanges (not shown) at both ends.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a venturi, its characterized in that, venturi is the flow measurement meter pipe of nested formula, and the flow measurement meter pipe includes the outer tube, sets up survey buret and the nested formula larynx neck pipe of setting in the outer tube on the outer tube, is equipped with the registration arm of larynx neck pipe respectively in the both sides of larynx neck pipe.
2. The venturi according to claim 1, wherein an axial key groove is provided on the inner wall of the outer tube, and an axial convex key is provided on the outer wall of the nested throat tube and the positioning tube.
3. The venturi tube according to claim 2, wherein radial holes are formed in the tube wall of the outer tube, the tube wall of the nested throat tube, and the positioning tube at corresponding positions, respectively, wherein the measuring tube is inserted into the inner wall of the nested throat tube and the inner wall of the positioning tube from the tube wall of the outer tube, and the measuring tube and the tube wall of the outer tube are welded together.
4. The venturi tube according to claim 3, wherein one end of the positioning tube is connected with the nested throat tube by bonding or welding, and a piston ring type retainer ring is provided at the other end of the positioning tube, and an outer ring of the piston ring type retainer ring is embedded in an annular groove of the inner wall of the outer tube.
5. The venturi tube according to claim 2, wherein the outer tube and the nested throat tube, and the positioning tube are tightly nested together to form a whole structure after being frozen by heating the nested throat tube and the positioning tube through the outer tube.
6. The venturi according to claim 2, wherein the outer tube, the nested throat tube, the positioning tube, and the measuring tube are all seamless steel tubes, or the nested throat tube and the positioning tube are nylon tubes, or the nested throat tube and the positioning tube are carbon fiber tubes.
7. The venturi of claim 1, wherein the nested throat tube comprises a middle section of reduced diameter and two flared sections.
8. The venturi according to claim 1, wherein a polytetrafluoroethylene plastic film layer is attached to the inner wall of the nested throat tube and the positioning tube.
9. The venturi according to claim 1, wherein a connecting flange is provided at both ends of the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021996181.5U CN213336267U (en) | 2020-09-14 | 2020-09-14 | Venturi tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021996181.5U CN213336267U (en) | 2020-09-14 | 2020-09-14 | Venturi tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213336267U true CN213336267U (en) | 2021-06-01 |
Family
ID=76062331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021996181.5U Active CN213336267U (en) | 2020-09-14 | 2020-09-14 | Venturi tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213336267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
-
2020
- 2020-09-14 CN CN202021996181.5U patent/CN213336267U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005556A (en) * | 2021-10-25 | 2022-02-01 | 山东核电设备制造有限公司 | Combined type current-limiting Venturi tube suitable for CVS and machining method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231101 Address after: 214400 No.98, Qiaoqi Renmin Road, XuXiake Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangsu Weiersheng Electronic Technology Co.,Ltd. Address before: 214400 No.12 Fuyuan Road, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: Jiangyin Weisheng Instrument Manufacturing Co.,Ltd. |