CN202869562U - Machining-type Venturi tube - Google Patents

Machining-type Venturi tube Download PDF

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Publication number
CN202869562U
CN202869562U CN 201220557113 CN201220557113U CN202869562U CN 202869562 U CN202869562 U CN 202869562U CN 201220557113 CN201220557113 CN 201220557113 CN 201220557113 U CN201220557113 U CN 201220557113U CN 202869562 U CN202869562 U CN 202869562U
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CN
China
Prior art keywords
venturi tube
pressure pipe
segment
machining
radial
Prior art date
Application number
CN 201220557113
Other languages
Chinese (zh)
Inventor
吴建峰
赵建军
Original Assignee
江阴市神州测控设备有限公司
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Filing date
Publication date
Application filed by 江阴市神州测控设备有限公司 filed Critical 江阴市神州测控设备有限公司
Priority to CN 201220557113 priority Critical patent/CN202869562U/en
Application granted granted Critical
Publication of CN202869562U publication Critical patent/CN202869562U/en

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Abstract

The utility model discloses a machining-type Venturi tube which comprises an inlet barrel segment, a cone contraction segment, a barrel throat pipe segment and a cone diffusion segment, wherein the inlet barrel segment, the cone contraction segment, the barrel throat pipe segment and the cone diffusion segment are sequentially arranged. A positive-pressure-getting pipe is arranged on the upper edge of the inlet barrel segment and along the radial direction of the Venturi tube, and a negative-pressure-getting pipe is arranged on the barrel throat pipe segment and along the radial direction of the Venturi tube. The machining-type Venturi tube not only inherits advantages of a standard Venturi tube which is high in accurate degree, good in repeatability, little in loss of pressure, short in required front straight pipeline and the like, but also has the advantages of being small in self-device and anti-blocking. The machining-type Venturi tube can be used for measurement of complex flow problems like double-direction flow, mixed flow, low flow velocity, large pipe diameter and special-shaped pipelines.

Description

A kind of machining type Venturi tube
Technical field
The utility model relates to a kind of venturi tube structure, is specifically related to a kind of machining type Venturi tube.
Background technology
Usually the integral machining type Venturi tube of design by parts such as joint flange, venturi body, positive and negative grading ring, positive and negative pressure guiding pipes by being welded.
Because installing positive and negative pressure guiding pipe bore less (φ 10 ~ φ 12), this can't adapt to for a long time use under dirty medium or band solid granular ambient condition, because above-mentioned medium very easily produces grading ring chamber or the obstruction of impulse mouth.
Venturi tube is divided into standard Venturi and general Venturi tube by structure.Standard (classics) Venturi tube is divided into standard venturi, the standard venturi with machining contraction section with thick casting contraction section, the standard venturi with thick soldering iron plate contraction section by its manufacture method difference.The problems such as yet the accuracy of standard Venturi tube is high, and repeatability is relatively poor, and crushing is larger, and required front straight pipeline is long.
The utility model content
The purpose of this utility model is to overcome the defective that exists in the prior art, provides a kind of accuracy high, good reproducibility, and crushing is little, and required front straight pipeline is short, and the less machining type Venturi tube of self device.
For achieving the above object, the technical solution of the utility model is a kind of machining type Venturi tube of design, it is characterized in that, described Venturi tube comprises entrance cylindrical section, circular cone contraction section, cylinder trunnion section and the circular cone diffuser that is arranged in order, on described entrance cylindrical section along Venturi tube radially be provided with positive pressure pipe, radially be provided with negative pressure pipe along Venturi tube on described cylinder trunnion section.
Wherein preferred technical scheme is, is respectively equipped with radial direction through hole at described entrance cylindrical section and cylinder trunnion section, and the setting position of described positive pressure pipe and negative pressure pipe and the position of described radial direction through hole are corresponding.
Further preferred technical scheme is, described positive pressure pipe be connected pressure pipe and be connected with radial direction through hole by grading ring, or be connected with radial direction through hole by flange.
Further preferred technical scheme also has, and the axis of described positive pressure pipe and negative pressure pipe is parallel to each other, and the axis of positive pressure pipe and negative pressure pipe is positioned on the same bus of Venturi tube.
Further preferred technical scheme also has, and is respectively equipped with joint flange at the two ends of described Venturi tube, and the joint flange that is positioned at described circular cone diffuser one end is bell mouth shape.
Further preferred technical scheme also has, and the cone angle of described circular cone contraction section is 20 0~ 22 0, the cone angle of described circular cone diffuser and bell mouth shape joint flange is 7 0~ 15 0
Advantage of the present utility model and beneficial effect are: this machine work Venturi tube is high except having inherited the accuracy of standard Venturi tube, good reproducibility, and crushing is little, and the advantages such as required front straight pipeline weak point also possess little, the anti-blocking advantage of self device.Can be used for two to stream, multi-phase flow, low flow velocity, Large Diameter Pipeline, the measurement of the complicated problems of liquid flow such as special-shaped pipeline.
The starting material such as the flange of this machine work Venturi tube, Venturi tube adopt III level forging, the machine work Venturi tube adopts whole wear-resisting forging process, guarantee that the machine work Venturi meter uses the special process condition-high pressure oxygen is measured, various dirty medium or contain the occasion of solid dielectric, be specially adapted to measurement and the control in Coal Chemical Industry industry Heisui River.
Be full of the fluid of pipeline, during throttling element in it flows through pipeline, flow velocity will form at Venturi tube larynx neck place local contraction, thereby flow velocity increases, and static pressure reduces, so just produced pressure reduction behind joint Venturi tube larynx throat.Fluid flow is larger, and the pressure reduction of generation is larger, can weigh according to pressure reduction like this size of flow.This measuring method is take flow continuity equation (law of conservation of mass) and Bernoulli equation (law of conservation of energy) as the basis.
Description of drawings
Fig. 1 is the structural representation of one of the utility model machining type Venturi tube;
Fig. 2 is two structural representation of the utility model machining type Venturi tube.
Among the figure: 1, entrance cylindrical section; 2, circular cone contraction section; 3, cylinder trunnion section; 4, circular cone diffuser; 5, positive pressure pipe; 6, negative pressure pipe; 7, radial direction through hole; 8, grading ring; 9, flange; 10, joint flange.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, 2, the utility model is a kind of machining type Venturi tube, individual Venturi tube comprises entrance cylindrical section 1, circular cone contraction section 2, cylinder trunnion section 3 and the circular cone diffuser 4 that is arranged in order, on described entrance cylindrical section 1, along the positive pressure pipe 5 of radially being provided with of Venturi tube, on described cylinder trunnion section 3, bear pressure pipe 6 along radially being provided with of Venturi tube.
Preferred embodiment is in the utility model, is respectively equipped with radial direction through hole 7 at described entrance cylindrical section 1 with cylinder trunnion section 3, and the setting position of described positive pressure pipe 5 and negative pressure pipe 6 and the position of described radial direction through hole 7 are corresponding.
Further preferred embodiment is in the utility model, described positive pressure pipe 5 be connected pressure pipe 6 and be connected with radial direction through hole 7 by grading ring 8, or pass through flange 9 and be connected with radial direction through hole 7.
Further preferred embodiment also has in the utility model, and the axis of described positive pressure pipe 5 and negative pressure pipe 6 is parallel to each other, and the axis of positive pressure pipe 5 and negative pressure pipe 6 is positioned on the same bus of Venturi tube.
Further preferred embodiment also has in the utility model, is respectively equipped with joint flange 10 at the two ends of described Venturi tube, and the joint flange 10 that is positioned at described circular cone diffuser 4 one ends is bell mouth shape.
Further preferred embodiment also has in the utility model, and the cone angle of described circular cone contraction section is 21 0± 1 0, described circular cone diffuser 4 is 7 with the cone angle of bell mouth shape joint flange 10 0~ 15 0
This machining type Venturi tube has:
1, this machine work Venturi tube is to manufacture and design by GB GB/T2624-2006, by the standard restriction device of GB JJG640 calibrating, need not to demarcate.
2, in the standard restriction device, its desired upstream and downstream straight length is the shortest, the permanent compression loss reduction.
3, stable performance, reliability height.
4, calculating is accurate, energy consumption is little.
5, can be used for the various dirty media such as liquid, gas, steam and two-phase flow.
6, simple in structure, easily install, easy to maintenance.
7, machine work Venturi tube is longer, approximately is 2 ~ 5 times of caliber.
8, machine work Venturi tube is specially adapted to the High Temperature High Pressure occasion.
This machine work Venturi tube mainly is comprised of entrance cylindrical section 1, circular cone contraction section 2, cylindrical shape trunnion section 3, circular cone diffuser 4.The diameter of cylindrical section 1 is that its length equals D; It is conical that contraction section 3 is, and the angle of 21o ± 1o is arranged; The trunnion section is the circular cylinder section 1 of diameter d, and its length equals d; Circular cone diffuser 4 is conical, and spread angle is 7o~15o.
Ways of measure pressure divides two kinds of forms:
1, drawn by positive and negative pressure pipe after all being pressed by grading ring, the occasion of applicable various gases at high pressure has been avoided affecting measurement because of the disturbance of air-flow again, is specially adapted to that Coal Chemical Industry industry high pressure oxygen is measured and control.As shown in Figure 1.
2, directly adopting the specification with joint flange 10 is that positive and negative pressure pipe is drawn, and it is more direct, more unobstructed that pressure is drawn, and has avoided dirty because of measuring media or viscosity is too high stops up, and has improved the measuring accuracy of installing.Applicable various dirty media or contain the occasion of solid dielectric are specially adapted to measurement and the control in Coal Chemical Industry industry Heisui River.As shown in Figure 2.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (6)

1. machining type Venturi tube, it is characterized in that, described Venturi tube comprises entrance cylindrical section, circular cone contraction section, cylinder trunnion section and the circular cone diffuser that is arranged in order, on described entrance cylindrical section along Venturi tube radially be provided with positive pressure pipe, radially be provided with negative pressure pipe along Venturi tube on described cylinder trunnion section.
2. such as the described machining type Venturi tube of claim l, it is characterized in that, be respectively equipped with radial direction through hole at described entrance cylindrical section and cylinder trunnion section, the setting position of described positive pressure pipe and negative pressure pipe and the position of described radial direction through hole are corresponding.
3. machining type Venturi tube as claimed in claim 2 is characterized in that, described positive pressure pipe be connected pressure pipe and be connected with radial direction through hole by grading ring, or be connected with radial direction through hole by flange.
4. machining type Venturi tube as claimed in claim 3 is characterized in that, the axis of described positive pressure pipe and negative pressure pipe is parallel to each other, and the axis of positive pressure pipe and negative pressure pipe is positioned on the same bus of Venturi tube.
5. machining type Venturi tube as claimed in claim 4 is characterized in that, is respectively equipped with joint flange at the two ends of described Venturi tube, and the joint flange that is positioned at described circular cone diffuser one end is bell mouth shape.
6. machining type Venturi tube as claimed in claim 5 is characterized in that, the cone angle of described circular cone contraction section is 20 0~ 22 0, the cone angle of described circular cone diffuser and bell mouth shape joint flange is 7 0~ 15 0
CN 201220557113 2012-10-27 2012-10-27 Machining-type Venturi tube CN202869562U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220557113 CN202869562U (en) 2012-10-27 2012-10-27 Machining-type Venturi tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220557113 CN202869562U (en) 2012-10-27 2012-10-27 Machining-type Venturi tube

Publications (1)

Publication Number Publication Date
CN202869562U true CN202869562U (en) 2013-04-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220557113 CN202869562U (en) 2012-10-27 2012-10-27 Machining-type Venturi tube

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103691858A (en) * 2013-11-06 2014-04-02 江阴市节流装置厂有限公司 Method for forging venturi pipe
CN103791953A (en) * 2013-05-28 2014-05-14 苍南自动化仪表厂 High-precision integrated nuclear Venturi tube
CN106762244A (en) * 2016-12-30 2017-05-31 广西玉柴机器股份有限公司 The measurement pipeline of engine EGR exhaust gas flow

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103791953A (en) * 2013-05-28 2014-05-14 苍南自动化仪表厂 High-precision integrated nuclear Venturi tube
CN103791953B (en) * 2013-05-28 2017-06-09 苍南自动化仪表厂 High-precision integrative core level Venturi tube
CN103691858A (en) * 2013-11-06 2014-04-02 江阴市节流装置厂有限公司 Method for forging venturi pipe
CN106762244A (en) * 2016-12-30 2017-05-31 广西玉柴机器股份有限公司 The measurement pipeline of engine EGR exhaust gas flow
CN106762244B (en) * 2016-12-30 2019-02-01 广西玉柴机器股份有限公司 The measurement pipeline of engine EGR exhaust gas flow

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130410

Termination date: 20181027