CN207991620U - A kind of spiral throttle flowmeter - Google Patents

A kind of spiral throttle flowmeter Download PDF

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Publication number
CN207991620U
CN207991620U CN201721860952.6U CN201721860952U CN207991620U CN 207991620 U CN207991620 U CN 207991620U CN 201721860952 U CN201721860952 U CN 201721860952U CN 207991620 U CN207991620 U CN 207991620U
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China
Prior art keywords
flange
flowmeter
tube
outlet
pressure pipe
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Application number
CN201721860952.6U
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Chinese (zh)
Inventor
高畅
王明伍
张坤
张翱
王永
廖波
许恺丽
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Research Institute of Nuclear Power Operation
China Nuclear Power Operation Technology Corp Ltd
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Research Institute of Nuclear Power Operation
China Nuclear Power Operation Technology Corp Ltd
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Priority to CN201721860952.6U priority Critical patent/CN207991620U/en
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Abstract

The utility model is related to pipeline fluid flow measurement technology fields, specifically disclose a kind of spiral throttle flowmeter.It is installed with stem in the outer tube of the flowmeter, and sealing screw runner is collectively formed, the sealing screw runner is the 10%~70% of outer tube sectional area in the sectional area of precession direction normal direction, and sectional area is along precession direction is constant or consecutive variations;Outer tube both ends are connected with suction flange and outlet(discharge) flange respectively, and are equipped with positive pressure pipe and negative pressure pipe on suction flange and outlet(discharge) flange respectively, and positive pressure pipe and negative pressure pipe is made to be connected to respectively with the through-hole on suction flange and outlet(discharge) flange.The flowmeter can avoid phase step type pressure of the fluid in orifice flowmeter and decline, and can effectively avoid cavitation phenomenons;Less appearance structure change phenomenon caused by generating cavitation so that efflux coefficient is stablized, and measurement accuracy is higher;Runner is continuous, and impurity is not easy to deposit in runner, can prevent from blocking inside runner, be suitble to measure kinds of processes fluid.

Description

A kind of spiral throttle flowmeter
Technical field
The invention belongs to pipeline fluid flow measurement technology fields, and in particular to a kind of spiral throttle flowmeter.
Background technology
The measurement of fluid flow, mostly uses orifice flowmeter in common industrial pipeline, usually have single-hole orifice plate flowmeter and Two kinds of multi-hole orifice flowmeter, orifice flowmeter is simple in structure, performance is stablized, but due to the restriction of many factors, orifice flow There is also some disadvantages for meter.
When measuring, fluid cannot make fluid in pipeline have siltation all by orifice plate, to maintenance or replace on pipeline Component brings inconvenience.When impure fluid carries out flow measurement in use orifice flowmeter is to pipeline, fluid flows through It will produce reflux after orifice plate, orifice plate rear end flow field is more disorderly, to aggravate the contamination precipitation in fluid, ultimately forms serious Fouling.Meanwhile the pressure after fluid flow through orifices plate will present phase step type variation, when use orifice flowmeter is to the high temperature in pipeline High-pressure fluid carry out flow measurement when, orifice plate rear end easy tos produce negative pressuren zone, easily generates cavitation phenomenons, influence measuring diaphragm and The service life of pipeline.
When carrying out flow measurement to the high-temperature, high pressure fluid in pipeline, due to effect of expanding with heat and contract with cold, the structure size of orifice plate Also it is easy to change, influences efflux coefficient, then measurement accuracy is had an impact;In addition it measures and contains various impurity, such as dust suspends When the fluid of object, sediment etc., orifice plate is easy to be blocked, and measurement accuracy is poor.
Invention content
The purpose of the present invention is to provide a kind of spiral throttle flowmeters, can overcome defect existing in the prior art, The pressure recovery obtained after fluid stream flow meter is less, is less prone to the advantages that cavitation phenomenons and efflux coefficient are stablized.
Technical scheme is as follows:A kind of spiral throttle flowmeter, which includes suction flange, stem, outer Casing and outlet(discharge) flange are installed with stem in the outer tube of cylindrical tube shape, and sealing screw runner is collectively formed, institute It is the 10%~70% of outer tube sectional area that sealing screw runner, which is stated, in the sectional area of precession direction normal direction, and sectional area is along rotation Into direction is constant or consecutive variations;Outer tube both ends are connected with suction flange and outlet(discharge) flange respectively, and respectively in import method Blue and outlet(discharge) flange is equipped with positive pressure pipe and negative pressure pipe, make positive pressure pipe and negative pressure pipe respectively with suction flange and outlet Through-hole connection on flange.
The outer wall of the stem is equipped with one or more helical tooths, the helical form ditch on helical tooth between adjacent two tooth Slot number is 1~4.
The spiral grooves cross-sectional width is 0.1~0.8 times of screw pitch.
The spiral grooves depth of section is 0.1~0.5 times of housing bore.
The spiral grooves are triangle, rectangle, trapezoidal or gradually distressed structure in the normal section in precession direction.
Screw pitch is 0.5~8 times of stem diameter in the helical tooth.
The stem is by welding or being interference fitted in the outer tube of cylindrical tube shape structure.
Import spacing ring and outlet spacing ring are installed in the suction flange and outlet(discharge) flange inner wall, for limiting The movement of outer tube processed in the axial direction.
It is provided with through-hole on the suction flange and import spacing ring, makes the positive pressure pipe phase of itself and installation outside suction flange Connection;It is provided with through-hole on outlet(discharge) flange and outlet spacing ring, it is made to be connected with negative pressure pipe.
Stem position single-stage stem in the outer tube, or multiple stems of connecting as needed.
The remarkable result of the present invention is:A kind of spiral throttle flowmeter of the present invention has the following advantages that:(1) originally Invention uses enclosing coil runner, fluid to advance in runner inside spin, and fluid is acted on by centrifugal force, and pressure continuity reduces, The pressure recovery flowed out after spiral throttle flowmeter is few, avoids phase step type pressure of the fluid in orifice flowmeter and declines, It can effectively avoid cavitation phenomenons;(2) when being measured to pipe high-temperature, high pressure fluid, spiral throttle flowmeter structure is unlikely to deform, Less appearance structure change phenomenon caused by generating cavitation so that efflux coefficient is stablized, and measurement accuracy is higher;(3) exist In enclosing coil runner, runner is continuous, and impurity is not easy to deposit in runner, can prevent from blocking inside runner, be suitble to measure a variety of Process fluid;(4) be not in reflux substantially after fluid flows through spiral throttle flowmeter, change orifice flowmeter exit flow field Disorderly disadvantage, can be effectively improved the fouling condition of flowmeter rear end, to extend the service life of flowmeter;(5) of the invention Device body is simple in structure, easy cleaning.
Description of the drawings
Fig. 1 is a kind of spiral throttle flowmeter front view of the present invention;
Fig. 2 is the A-A sectional views of Fig. 1;
Fig. 3 is a kind of structural schematic diagram of stem in Fig. 2;
Fig. 4 is another structural schematic diagram of stem in Fig. 2;
Fig. 5 is the third structural schematic diagram of stem in Fig. 2;
In figure:1, suction flange;2, positive pressure pipe;3, stem;4, outer tube;5, import spacing ring;6, negative pressure pipe;7、 Outlet(discharge) flange;8, spacing ring is exported.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment invention is further described in detail.
As shown in Fig. 1~5, a kind of spiral throttle flowmeter, including suction flange 1, stem 3, outer tube 4 and outlet method Orchid 7, wherein stem 3 is collectively formed close by welding or being interference fitted in the outer tube 4 of cylindrical tube shape structure Helical flow path is sealed, which is the 10%~70% of outer tube sectional area in the sectional area of precession direction normal direction, and Sectional area is along precession direction is constant or consecutive variations;One or more helical tooths are provided on the outer wall of stem 3, screw pitch is 0.5~8 times of 3 diameter of stem, on helical tooth between adjacent two tooth be spiral groove, spiral groove number be 1~4, spiral shell The precession direction for revolving groove is left-handed or dextrorotation;Spiral grooves the normal section in precession direction be triangle, it is rectangle, trapezoidal Or gradually distressed structure, spiral grooves cross-sectional width are 0.1~0.8 times of screw pitch, spiral grooves depth of section is in outer tube 0.1~0.5 times of diameter;4 both ends of outer tube by way of welding or being threadedly coupled respectively with suction flange 1 and outlet(discharge) flange 7 It is fixedly connected, and is installed with import spacing ring 5 and outlet spacing ring 8 in 7 inner wall of suction flange 1 and outlet(discharge) flange, use In the movement of limitation outer tube 4 in the axial direction;It is provided with through-hole on suction flange 1 and import spacing ring 5, makes itself and import method The positive pressure pipe 2 installed outside orchid 1 is connected;It is provided with through-hole on outlet(discharge) flange 7 and outlet spacing ring 8, makes itself and negative pressure Pipe 6 is connected;Stem in outer tube 4 can be single-stage stem, or multiple stems of connecting as needed.

Claims (10)

1. a kind of spiral throttle flowmeter, it is characterised in that:The flowmeter includes suction flange (1), stem (3), outer tube (4) And outlet(discharge) flange (7), it is installed with stem (3) in the outer tube (4) of cylindrical tube shape, and sealing screw stream is collectively formed Road, the sealing screw runner is the 10%~70% of outer tube sectional area in the sectional area of precession direction normal direction, and sectional area Along precession direction is constant or consecutive variations;Outer tube (4) both ends are connected with suction flange (1) and outlet(discharge) flange (7) respectively, And positive pressure pipe (2) and negative pressure pipe (6) are equipped on suction flange (1) and outlet(discharge) flange (7) respectively, make positive pressure pipe (2) It is connected to respectively with the through-hole on suction flange (1) and outlet(discharge) flange (7) with negative pressure pipe (6).
2. a kind of spiral throttle flowmeter according to claim 1, it is characterised in that:On the outer wall of the stem (3) Equipped with one or more helical tooths, the spiral groove number on helical tooth between adjacent two tooth is 1~4.
3. a kind of spiral throttle flowmeter according to claim 2, it is characterised in that:The spiral groove section is wide Degree is 0.1~0.8 times of screw pitch.
4. a kind of spiral throttle flowmeter according to claim 2, it is characterised in that:The spiral groove section is high Degree is 0.1~0.5 times of housing bore.
5. a kind of spiral throttle flowmeter according to claim 2, it is characterised in that:The spiral groove is in precession The normal section in direction is triangle, rectangle, trapezoidal or gradually distressed structure.
6. a kind of spiral throttle flowmeter according to claim 2, it is characterised in that:Screw pitch is core in the helical tooth 0.5~8 times of column (3) diameter.
7. a kind of spiral throttle flowmeter according to claim 1, it is characterised in that:The stem (3) passes through welding Or interference fit is in the outer tube (4) of cylindrical tube shape structure.
8. a kind of spiral throttle flowmeter according to claim 1, it is characterised in that:The suction flange (1) and go out It is installed with import spacing ring (5) and outlet spacing ring (8) in mouth flange (7) inner wall, for limiting outer tube (4) in axial direction The movement in direction.
9. a kind of spiral throttle flowmeter according to claim 8, it is characterised in that:The suction flange (1) and into It is provided with through-hole on mouth spacing ring (5), it is made to be connected with the positive pressure pipe (2) that suction flange (1) is installed outside;In outlet(discharge) flange (7) and on outlet spacing ring (8) it is provided with through-hole, it is made to be connected with negative pressure pipe (6).
10. a kind of spiral throttle flowmeter according to claim 1, it is characterised in that:Core in the outer tube (4) Column (3) position single-stage stem, or multiple stems (3) of connecting as needed.
CN201721860952.6U 2017-12-27 2017-12-27 A kind of spiral throttle flowmeter Active CN207991620U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721860952.6U CN207991620U (en) 2017-12-27 2017-12-27 A kind of spiral throttle flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721860952.6U CN207991620U (en) 2017-12-27 2017-12-27 A kind of spiral throttle flowmeter

Publications (1)

Publication Number Publication Date
CN207991620U true CN207991620U (en) 2018-10-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721860952.6U Active CN207991620U (en) 2017-12-27 2017-12-27 A kind of spiral throttle flowmeter

Country Status (1)

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CN (1) CN207991620U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111103023A (en) * 2020-01-06 2020-05-05 黄有寿 Flow instrument with connector mud dirt cleaning and cavitation-erosion-prevention blasting protection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111103023A (en) * 2020-01-06 2020-05-05 黄有寿 Flow instrument with connector mud dirt cleaning and cavitation-erosion-prevention blasting protection

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