CN203605986U - High-precision Venturi tube - Google Patents
High-precision Venturi tube Download PDFInfo
- Publication number
- CN203605986U CN203605986U CN201320752618.4U CN201320752618U CN203605986U CN 203605986 U CN203605986 U CN 203605986U CN 201320752618 U CN201320752618 U CN 201320752618U CN 203605986 U CN203605986 U CN 203605986U
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- China
- Prior art keywords
- tube
- outer tube
- linkage section
- section
- diffuser
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- Expired - Fee Related
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Abstract
The utility model relates to a high-precision Venturi tube. The Venturi tube comprises an outer tube (1) and an inner tube (3). The inner tube (3) comprises a connection section (3.1) arranged in a tube cavity of the outer tube (1), the front end and the rear end of the connection section (3.1) are connected with a retraction section (3.2) and a diffusion section (3.3) respectively, two vent holes (2) are formed in the outer tube (1), four pressure-abstracting tubes (6) are arranged on the outer tube (1), a plurality of through holes (3.4) are formed in the connection section (3.1), the retraction section (3.2) and the diffusion section (3.3) of the inner tube (3), at least one sewage discharging hole (5) is further formed in the outer tube, and the sewage discharging hole (5) is communicated with a cavity formed by the outer tube (1) and the inner tube (3). The high-precision Venturi tube has high measurement precision.
Description
Technical field
The utility model relates to a kind of high precision Venturi tube.
Background technology
Venturi tube (Venturi throat) is a kind ofly to carry out for convection cell the routine measurement instrument that flow rate is measured, and it is widely used in the measurement of wind of boiler, the Secondary Air Large Diameter Pipeline of combustion air, cold wind, gas measurement (blast furnace gas, coke-oven gas, coal gas of converter) and the cogeneration plant of steel plant's heat generator, low flow velocity pipeline meter; And measure wide-range and high-precision occasion for nuclear power station owner feedwater flow, and only have high precision Venturi tube just can meet the demands, measuring accuracy should be not less than 0.5% of range.
The purpose of this utility model is to overcome above-mentioned deficiency, and the high precision that a kind of measuring accuracy is high, range ratio is wide Venturi tube is provided.
The purpose of this utility model is achieved in that a kind of high precision Venturi tube, each Venturi tube need be joined the differential pressure transmitter (narrow range and wide-range) of two kinds of ranges, described Venturi tube includes outer tube and inner tube, described inner tube includes the linkage section in the tube chamber that is arranged at outer tube, the rear and front end of described linkage section is connected with respectively contraction section and diffuser, described contraction section is connected away from one end of linkage section and the inner tubal wall of outer tube, described diffuser is connected away from one end of linkage section and the inner tubal wall of outer tube, described linkage section, the outer wall of inner tube and the inwall of outer tube that contraction section and diffuser form form a cavity, on described outer tube, be provided with two vent ports, one of them vent port is in the high-pressure side at outer tube top, be connected with the tube chamber of outer tube, another is in the low-pressure side at outer tube top, the tube chamber that is positioned at linkage section place by stainless steel flexible hose and inner tube is connected, two pairs of independently pressure pipes are set on described outer tube, wherein one group of pressure pipe is connected with the tube chamber of outer tube, another group pressure pipe is connected with the tube chamber that inner tube is positioned at linkage section place, the linkage section of described formation inner tube, on contraction section and diffuser, be provided with multiple through holes, on described outer tube, be also provided with at least one mudhole, this mudhole is connected with the cavity that above-mentioned outer tube and inner tube form, meanwhile, when use, the turbulent flow causing in order to ensure upstream weld seam does not affect pressure to be measured, and the outer segment in welding end downstream must have the length (D is internal diameter of the pipeline) of 2D ~ 3D.
The utility model high precision Venturi tube, described contraction section and diffuser are all horn-like structure, and the small-caliber end of contraction section and diffuser is all connected with linkage section, and the inwall of heavy caliber Duan Junyu outer tube is connected.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is discharged by vent port the gas that is positioned at Venturi tube top, thereby increase measuring accuracy, and, when measurement because the impurity of long-time deposition can be discharged by mudhole smoothly, thereby increase its measuring accuracy, extended its serviceable life.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model high precision Venturi tube.
Fig. 2 is the side view of the utility model high precision Venturi tube.
Wherein:
Outer tube 1, vent port 2, inner tube 3, stainless steel flexible hose 4, mudhole 5, pressure pipe 6;
Linkage section 3.1, contraction section 3.2, diffuser 3.3, through hole 3.4.
Embodiment
Referring to Fig. 1, a kind of high precision Venturi tube that the utility model relates to, described Venturi tube includes outer tube 1 and inner tube 3, described inner tube 3 includes the linkage section 3.1 in the tube chamber that is arranged at outer tube 1, the rear and front end of described linkage section 3.1 is connected with respectively contraction section 3.2 and diffuser 3.3, described contraction section 3.2 and diffuser 3.3 are all horn-like structure, and the small-caliber end of contraction section 3.2 and diffuser 3.3 is all connected with linkage section 3.1, the inwall of heavy caliber Duan Junyu outer tube 1 is connected, concretely, described contraction section 3.2 is connected with the inner tubal wall of outer tube 1 away from one end of linkage section 3.1, described diffuser 3.3 is connected with the inner tubal wall of outer tube 1 away from one end of linkage section 3.1, described linkage section 3.1, the outer wall of inner tube 3 and the inwall of outer tube that contraction section 3.2 and diffuser 3.3 form form a cavity, on described outer tube 1, be provided with two vent ports 2, one of them vent port 2 is connected with the tube chamber of outer tube 1, another tube chamber that is positioned at linkage section 3.1 places by stainless steel flexible hose 4 and inner tube 3 is connected, on described outer tube 1, be provided with every group of pressure pipe of two groups of pressure pipe 6(6 and there are two, angle between two pressure pipes of same group is 130 °), wherein one group of pressure pipe 6 is connected with the tube chamber of outer tube 1, another group pressure pipe 6 is connected with the tube chamber that inner tube 3 is positioned at linkage section 3.1 places, the linkage section 3.1 of described formation inner tube 3, on contraction section 3.2 and diffuser 3.3, be provided with multiple through holes 3.4, on described outer tube 1, be also provided with at least one mudhole 5, this mudhole 5 is connected with the cavity that above-mentioned outer tube 1 and inner tube 3 form, and (and angle between two pressure pipes in mudhole 5 and same group is 65 °, the benefit arranging is like this, when normal pressure, the impurity such as mud sink down into mudhole and flow out, and pressure pipe is owing to being positioned at the below of mudhole, therefore be not subject to the impact of the impurity such as mud when its pressure, be conducive to improve the precision of measuring), while being convenient to measurement, the impurity of deposition is discharged.
When measurement, vent port 2 for will be positioned at the gas at Venturi tube top discharge, thereby increase measuring accuracy, when measurement because the impurity of long-time deposition can be discharged by mudhole 5 smoothly, thereby increased its measuring accuracy, extended its serviceable life.
Claims (2)
1. a high precision Venturi tube, described Venturi tube includes outer tube (1) and inner tube (3), it is characterized in that: described inner tube (3) includes the linkage section (3.1) in the tube chamber that is arranged at outer tube (1), the rear and front end of described linkage section (3.1) is connected with respectively contraction section (3.2) and diffuser (3.3), described contraction section (3.2) is connected with the inner tubal wall of outer tube (1) away from one end of linkage section (3.1), described diffuser (3.3) is connected with the inner tubal wall of outer tube (1) away from one end of linkage section (3.1), described linkage section (3.1), the outer wall of inner tube (3) and the inwall of outer tube that contraction section (3.2) and diffuser (3.3) form form a cavity, on described outer tube (1), be provided with two vent ports (2), one of them pore (2) is connected with the tube chamber of outer tube (1), another is positioned at by stainless steel flexible hose (4) and inner tube (3) tube chamber that linkage section (3.1) locates and is connected, on described outer tube (1), be provided with two groups of pressure pipes (6), wherein one group of pressure pipe (6) is connected with the tube chamber of outer tube (1), another group pressure pipe (6) is positioned at inner tube (3) tube chamber that linkage section (3.1) locates and is connected, the linkage section (3.1) of described formation inner tube (3), on contraction section (3.2) and diffuser (3.3), be provided with multiple through holes (3.4), on described outer tube (1), be also provided with at least one mudhole (5), this mudhole (5) is connected with the cavity that above-mentioned outer tube (1) and inner tube (3) form.
2. a kind of high precision Venturi tube as claimed in claim 1, it is characterized in that: described contraction section (3.2) and diffuser (3.3) are all horn-like structure, and the small-caliber end of contraction section (3.2) and diffuser (3.3) is all connected with linkage section (3.1), and the inwall of heavy caliber Duan Junyu outer tube (1) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320752618.4U CN203605986U (en) | 2013-11-26 | 2013-11-26 | High-precision Venturi tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320752618.4U CN203605986U (en) | 2013-11-26 | 2013-11-26 | High-precision Venturi tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203605986U true CN203605986U (en) | 2014-05-21 |
Family
ID=50718652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320752618.4U Expired - Fee Related CN203605986U (en) | 2013-11-26 | 2013-11-26 | High-precision Venturi tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203605986U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330336A (en) * | 2014-11-07 | 2015-02-04 | 中国石油大学(华东) | ICA and SVM-based gas-liquid two-phase flow pattern identification method |
| CN105675070A (en) * | 2016-03-28 | 2016-06-15 | 中国海洋石油总公司 | Irregular Venturi flowmeter and method for measuring gas-liquid phase flow in multiphase flow by utilization of irregular Venturi flowmeter |
| CN107314397A (en) * | 2017-08-08 | 2017-11-03 | 卢驭龙 | Plasma torch device and plasma kitchen range |
-
2013
- 2013-11-26 CN CN201320752618.4U patent/CN203605986U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330336A (en) * | 2014-11-07 | 2015-02-04 | 中国石油大学(华东) | ICA and SVM-based gas-liquid two-phase flow pattern identification method |
| CN105675070A (en) * | 2016-03-28 | 2016-06-15 | 中国海洋石油总公司 | Irregular Venturi flowmeter and method for measuring gas-liquid phase flow in multiphase flow by utilization of irregular Venturi flowmeter |
| CN107314397A (en) * | 2017-08-08 | 2017-11-03 | 卢驭龙 | Plasma torch device and plasma kitchen range |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20201126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |