CN201622084U - Novel built-in throttling device - Google Patents

Novel built-in throttling device Download PDF

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Publication number
CN201622084U
CN201622084U CN2010201057729U CN201020105772U CN201622084U CN 201622084 U CN201622084 U CN 201622084U CN 2010201057729 U CN2010201057729 U CN 2010201057729U CN 201020105772 U CN201020105772 U CN 201020105772U CN 201622084 U CN201622084 U CN 201622084U
Authority
CN
China
Prior art keywords
pressure
tube
measuring
pipelines
throttling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010201057729U
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Chinese (zh)
Inventor
徐思皓
龚燕平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANXI YIXIN MONITORING INSTRUMENTS CO Ltd
Original Assignee
SHANXI YIXIN MONITORING INSTRUMENTS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANXI YIXIN MONITORING INSTRUMENTS CO Ltd filed Critical SHANXI YIXIN MONITORING INSTRUMENTS CO Ltd
Priority to CN2010201057729U priority Critical patent/CN201622084U/en
Application granted granted Critical
Publication of CN201622084U publication Critical patent/CN201622084U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a novel built-in throttling device which comprises a detecting pipe with connecting flanges arranged at the front and the rear ends, a front pressure-measuring chamber and a front pressure-measuring port arranged on the upper side of the front end of the wall of the detecting pipe, as well as a Venturi tube arranged inside the detecting pipe, wherein the Venturi tube is formed by connecting a front tapered tube, a pressure-measuring choke tube and a rear flared tube in sequence; the pressure-measuring choke tube is a round tube section and a pressure-measuring hole is formed on the pressure-measuring choke tube; a rear pressure-measuring chamber and a rear pressure-measuring port are arranged on the upper side of the middle part of the wall of the detecting pipe and communicated with the pressure-measuring hole; and the inner surfaces of the front tapered tube and the rear flared tube are both hyperbolic curve-shaped surfaces. The novel built-in throttling device has the characteristics of novel structure, reasonable design, small volume, convenient transportation and delivery, no risk of unnecessary loss of fluid pressure, low production cost and easy generalization and application.

Description

Novel hidden throttling device
Technical field
The utility model relates to a kind of fluid measurement instrument, is specifically related to a kind of novel hidden throttling device.
Background technology
At present, enterprise is to low-pressure, the big caliber gas of low pressure that low discharge and flow velocity are slower, as coal gas, in the flow measurement of dirtier medium such as flue gas, the normal common standard type restriction device that adopts, as: the standard orifice plate metering, adopt the standard orifice plate metering to have following shortcoming: 1. measured medium pressure is lower, negative pressure is also arranged sometimes, cause the pipeline internal medium flow very little, flow velocity is very low, therefore the differential pressure signal that records is minimum, can only select differential pressure transmitter for use, and differential pressure transmitter is easy to cause zero point drift, measuring accuracy is low, and very wayward and differential pressure transmitter cost is very expensive; 2. measured medium pressure is very low, and flow velocity is slow, and selection standard type restriction device usually can stop up pressure port, if the output of no differential pressure signal can only be done and scrap processing.3. the desired installation site of standard form restriction device is very harsh, straight pipeline is that 10 times of pipe diameters are above before general the requirement, the back straight pipeline is 5 times more than the pipe diameter, when fluid measurement, because pipeline often has annexes such as threeway, elbow, valve, so on-the-spot can not possess very long straight length, and flowmeter is installed; 4. generally has only the amplification differential pressure signal for pursuing measuring accuracy, reach the measuring accuracy of differential pressure transmitter, the artificial restricting element that dwindles, improve the differential pressure output signal, the result who does has like this caused the pressure loss of pipeline very big, measured medium pressure about 30% often, and this loss is generally irrecoverable, and this does not meet the requirement of the national energy-saving and emission-reduction of being advocated.
Domestic patent ZL02232386.8 discloses a kind of hidden throttling device, inner Venturi tube front end collapsible tube and the rear end anemostat of this device all adopts Taper Pipe, though Taper Pipe can play the purpose that makes fluid contraction and diffusion, but adopt Taper Pipe can cause certain fluid pressure loss, and the pressure loss is very big, and is generally irrecoverable.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of novel hidden throttling device is provided, and its novel structure is reasonable in design; Volume is small and exquisite, is convenient to carrying, transportation; Do not cause unnecessary fluid pressure loss; Production cost is low, is convenient to promote the use of.
For achieving the above object, the technical solution adopted in the utility model is: a kind of novel hidden throttling device, comprise that the front and back end is provided with the pipelines of joint flange, pressure chamber and preceding pressure tappings before described pipelines tube wall front end upside is provided with, described pipelines inside is provided with a Venturi tube, described Venturi tube is by preceding collapsible tube, pressure trunnion and back anemostat are formed by connecting in turn, described pressure trunnion is the pipe section, it is characterized in that: described pressure trunnion is provided with pressure port, described pipelines tube wall middle part upside is provided with back pressure chamber and the back pressure tappings that is communicated with pressure port, and the inside surface of described preceding collapsible tube and back anemostat all is the hyperbolic curve or the para-curve surface of revolution.
The curvature of collapsible tube inside surface is greater than the curvature of back anemostat inside surface before described.
Described pipelines tube wall front end downside is provided with and detects mouth, and pipelines tube wall downside is provided with the purging mouth that is connected with pressure chamber, back.
The utility model compared with prior art has the following advantages:
(1) novel structure, reasonable in design.This novel hidden throttling device novel structure, the porch is provided with level and smooth inlet contraction section, can play and induce rectified action, and exit and pressure releasing section can make pressure recover gradually, greatly reduce the pressure loss;
(2) volume is small and exquisite, is convenient to transportation.This novel hidden throttling device volume is little, in light weight, is convenient to very much carrying, transportation;
(3) do not cause unnecessary fluid pressure loss.Through Hydrodynamics Theory analysis and a large amount of wind tunnel experiment checkings, the inside of the preceding collapsible tube of this novel hidden throttling device and back anemostat all is the hyperbolic curve surface of revolution, make fluid pressure loss approximately have only about 3% of differential pressure signal, have substantial degradation than the general standard type restriction device pressure loss;
(4) production cost low, be convenient to promote the use of.The a lot of parts of this novel hidden throttling device all are convenient to produce, buy very much, thereby its production cost is very low, is convenient to promote the use of.
Below by drawings and Examples, the utility model is described in further detail.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Description of reference numerals:
The 1-pipelines; Collapsible tube before the 2-; 3-pressure trunnion;
Anemostat behind the 4-; The 5-pressure port; Pressure chamber before the 6-;
Pressure tappings before the 7-; Pressure chamber behind the 8-; Pressure tappings behind the 9-;
10-detects mouth; 11-purges mouth.
Embodiment
A kind of novel hidden throttling device as shown in Figure 1, comprise that the front and back end is provided with the pipelines 1 of joint flange, pressure chamber 6 and preceding pressure tappings 7 before described pipelines 1 tube wall front end upside is provided with, described pipelines 1 inside is provided with a Venturi tube, described Venturi tube is by preceding collapsible tube 2, pressure trunnion 3 and back anemostat 4 are formed by connecting in turn, described pressure trunnion 3 is the pipe section, described pressure trunnion 3 is provided with pressure port 5, described pipelines 1 tube wall middle part upside is provided with back pressure chamber 8 and the back pressure tappings 9 that is communicated with pressure port 5, the inside surface of collapsible tube 2 and back anemostat 4 all is the hyperbolic curve or the para-curve surface of revolution before described, hyperbolic curve or para-curve surface of revolution surface smoothing can effectively prevent the loss of Venturi tube pressure inside.
As shown in Figure 1, the curvature of described preceding collapsible tube 2 inside surfaces is greater than the curvature of back anemostat 4 inside surfaces.
As shown in Figure 1, described pipelines 1 tube wall front end downside is provided with and detects mouthfuls 10, and pipelines 1 tube wall downside is provided with the purging mouth 11 that is connected with pressure chamber, back 8, purges mouthful 11 solid particle or the dust that can purge in the pressure chamber, back 8, prevents obstruction.
The course of work of the novel hidden throttling device of the utility model is: at first should be fixedly mounted on the working position by novel hidden throttling device, when fluid passes through this novel hidden throttling device, change the flow velocity of measured medium through preceding collapsible tube 2, by 3 rectifications of pressure trunnion, play the effect of secondary speed-raising, anemostat 4 recovers fluid pressure loss gradually after the warp then.
Use measurement mechanism to record preceding pressure tappings 7 places of the hidden throttling device of flowing through and the pressure of back pressure tappings 9, form pressure differential, the pressure differential of gained draws the mathematical model between pressure differential and the fluid in conjunction with Hydrodynamics Theory and wind tunnel experiment, thereby draws real traffic in the pipeline.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solutions of the utility model.

Claims (3)

1. novel hidden throttling device, comprise that the front and back end is provided with the pipelines of joint flange (1), pressure chamber (6) and preceding pressure tappings (7) before described pipelines (1) tube wall front end upside is provided with, described pipelines (1) inside is provided with a Venturi tube, described Venturi tube is by preceding collapsible tube (2), pressure trunnion (3) and back anemostat (4) are formed by connecting in turn, described pressure trunnion (3) is the pipe section, it is characterized in that: described pressure trunnion (3) is provided with pressure port (5), described pipelines (1) tube wall middle part upside is provided with back pressure chamber (8) and the back pressure tappings (9) that is communicated with pressure port (5), and the inside surface of described preceding collapsible tube (2) and back anemostat (4) all is the hyperbolic curve or the para-curve surface of revolution.
2. according to the described novel hidden throttling device of claim 1, it is characterized in that: the curvature of collapsible tube (2) inside surface is greater than the curvature of back anemostat (4) inside surface before described.
3. according to the described novel hidden throttling device of claim 1, it is characterized in that: described pipelines (1) tube wall front end downside is provided with and detects mouthful (10), and pipelines (1) tube wall downside is provided with the purging mouth (11) that is connected with pressure chamber, back (8).
CN2010201057729U 2010-01-29 2010-01-29 Novel built-in throttling device Expired - Fee Related CN201622084U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201057729U CN201622084U (en) 2010-01-29 2010-01-29 Novel built-in throttling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201057729U CN201622084U (en) 2010-01-29 2010-01-29 Novel built-in throttling device

Publications (1)

Publication Number Publication Date
CN201622084U true CN201622084U (en) 2010-11-03

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Country Status (1)

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CN (1) CN201622084U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893462A (en) * 2010-06-28 2010-11-24 江阴市节流装置厂有限公司 Extension-type Venturi tube and processing method and application method thereof
CN105545281A (en) * 2015-11-30 2016-05-04 中国石油天然气股份有限公司 Gas throttling simulator
CN109382231A (en) * 2018-10-25 2019-02-26 辽宁工程技术大学 A kind of probe-type supersonic speed pneumatic nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893462A (en) * 2010-06-28 2010-11-24 江阴市节流装置厂有限公司 Extension-type Venturi tube and processing method and application method thereof
CN105545281A (en) * 2015-11-30 2016-05-04 中国石油天然气股份有限公司 Gas throttling simulator
CN109382231A (en) * 2018-10-25 2019-02-26 辽宁工程技术大学 A kind of probe-type supersonic speed pneumatic nozzle
CN109382231B (en) * 2018-10-25 2020-08-25 辽宁工程技术大学 Probe-type supersonic pneumatic atomizing nozzle

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

Granted publication date: 20101103

Termination date: 20150129

EXPY Termination of patent right or utility model