CN103226051B - Pressure transmitting element for large-diameter negative pressure steam pipeline - Google Patents
Pressure transmitting element for large-diameter negative pressure steam pipeline Download PDFInfo
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- CN103226051B CN103226051B CN201310115355.0A CN201310115355A CN103226051B CN 103226051 B CN103226051 B CN 103226051B CN 201310115355 A CN201310115355 A CN 201310115355A CN 103226051 B CN103226051 B CN 103226051B
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Abstract
The invention discloses a pressure transmitting element for measuring a pressure of a large-diameter negative pressure steam pipeline and solves the problem that in an existing open sampling method, testing accuracy is easy to influence by flowing nonuniformity of fluid in a pipe. The pressure transmitting element comprises a pressure transmitting conduit (3) arranged in a tested pipeline (11); the pressure transmitting conduit (3) is communicated with L-shaped sampling bent pipes (4); a horizontal section pipe (8) of each L-shaped sampling bent pipe (4) points at the incoming flow direction of steam flow in the tested pipeline (11) and is parallel to the incoming flow direction of the steam flow; the side wall of each horizontal section pipe (8) is provided with four pressure inlet pores (10) which are arranged at equal radian intervals; and four to eight L-shaped sampling bent pipes (4) are arranged between the center point in the pressure transmitting conduit (3) and the inner wall of the left side of the tested pipeline (11). The pressure transmitting element is particularly suitable for pressure sampling of pressure testing and system resistance testing of a steam exhaust pipeline system of a direct air-cooling unit.
Description
Technical field
The present invention relates to a kind of pressure transmission element for major diameter negative pressure steam pipework, particularly a kind of in Direct Air-cooled Unit gland steam exhauster and in steam-distributing pipe, arrange for tonometric pressure transmission element.
Background technology
Pressure is important hydrokinetic parameter, in negative pressure system, because absolute pressure is low, meet certain measuring accuracy, pressure transmission element has been proposed to higher accuracy requirement, and particularly, for direct empty unit exhauster system, tonometric precision is even more important.At present, the internal diameter of the exhaust line of Direct Air-cooled Unit is between 2-6.5 rice, and flow velocity reaches 50-110 meter per second.The pressure survey of exhaust line is generally to adopt on pipeline directly perforate to measure near pressure tube wall, because large diameter pipeline keeps at a certain distance away, telescopic joint compensation system and pipe inner support gusset will be installed, this just forms certain flow-disturbing phenomenon on inner surface of pipeline, so, near the pressure tube wall of existing direct perforate sampling, can not represent the mean pressure of the fluid of whole pipeline.
Summary of the invention
The invention provides a kind of pressure transmission element for major diameter negative pressure steam pipework, solved the existing measuring accuracy of existing opening sampling method and be easily subject to the tube fluid inhomogeneous technical matters affecting that flows.
The present invention solves the problems of the technologies described above by the following technical programs:
A kind of major diameter negative pressure steam pipework pressure survey pressure transmission element, comprise tested pipeline, on the tube wall of tested pipeline, correspondence is respectively arranged with bigger diameter end plate and path end plate, on bigger diameter end plate, be provided with pressure transmission conduit through hole, one end of pressure transmission conduit is fixedly connected with path end plate, the other end of pressure transmission conduit is passed in one end connection that the pressure transmission conduit arranging on bigger diameter end plate passes Kong Houyu pressure measurement short tube, on the other end of pressure measurement short tube, be connected with downhole joint, on downhole joint, be connected with pressure measuring instrument, on pressure transmission conduit, be communicated with L shaped sampling bend pipe, L shaped sampling bend pipe is comprised of vertical section pipe and horizontal segment pipe, the outer end of the vertical section pipe of L shaped sampling bend pipe is connected with pressure transmission conduit, the horizontal segment pipe of L shaped sampling bend pipe is that the steam flow pointing in measured tube road carrys out flow path direction and comes flow path direction parallel with steam flow, top at the horizontal segment pipe of L shaped sampling bend pipe is provided with end semisphere block head, on the sidewall of horizontal segment pipe, be provided with four entrance pressure apertures that wait radian interval, in the pipe of pressure transmission conduit, central point is to being provided with 4-8 L shaped sampling bend pipe between the inner left wall of tested pipeline, in the pipe of pressure transmission conduit, central point is to being provided with 4-8 L shaped sampling bend pipe between the right side inwall of tested pipeline, the L shaped sampling bend pipe that the central point both sides of the pressure transmission conduit in tested pipeline arrange be take pressure transmission conduit central point as symcenter symmetrically arranged.
Central point at pressure transmission conduit is provided with between the inner left wall of tested pipeline
nindividual L shaped sampling bend pipe, the
idistance between individual L shaped sampling bend pipe and the central point of pressure transmission conduit
meet following formula:
.
The diameter of L shaped sampling bend pipe is 1:4-1:3 with the diameter ratio of pressure transmission conduit; The ratio of horizontal segment pipe and vertical section pipe is between 1:1.5-1:2; The length of horizontal segment pipe (8) be L shaped sampling bend pipe diameter 8-10 doubly.
On pressure measurement short tube, be provided with the incoming flow direction sign small gap of fluid in tested pipeline.
Pressure transmission conduit of the present invention is the seamless manometer tube of pachydermia, and the total length of conduit is suitable with the external diameter of measuring pipeline, and determines according to pipeline external diameter size homogeneous tube or the multitube Site Welding mode of adopting.
On pressure transmission conduit, be welded with L shaped sampling bend pipe, L shaped sampling bend pipe, is determined by the internal diameter of sampling spot quantity and measuring tube according to waiting anchor ring test philosophy in the supravasal position of pressure transmission.Generally, in radius size, number of sampling measures 4-8, forms multiple spot and all presses measurement, can obtain the mean pressure in cross section.
Path end plate in pressure transmission conduit one end plays plugging action, the bigger diameter end plate perforate of the other end with and pressure transmission conduit with the pressure measuring tie-in short tube welding in footpath, on pressure measuring tie-in short tube, part polishes and forms small gap and represent flow path direction, so that determine installation position during actual installation.During practical application, can adopt right-angled intersection layout two cover pressure transmission elements to measure, the mean value of getting two-way measuring point pressure is determined the mean pressure of pipeline.
Applied range of the present invention, reliable working performance, cost performance is high, is specially adapted to the pressure test of exhaust line system and the pressure samples of SR test of Direct Air-cooled Unit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of L shaped sampling bend pipe of the present invention;
Fig. 3 is that measurement sampling spot of the present invention is determined schematic diagram.
Embodiment
A kind of major diameter negative pressure steam pipework pressure survey pressure transmission element, comprise tested pipeline 11, on the tube wall of tested pipeline 11, correspondence is respectively arranged with bigger diameter end plate 6 and path end plate 7, on bigger diameter end plate 6, be provided with pressure transmission conduit through hole, one end of pressure transmission conduit 3 is fixedly connected with path end plate 7, the other end of pressure transmission conduit 3 is passed in one end connection that the pressure transmission conduit arranging on bigger diameter end plate 6 passes Kong Houyu pressure measurement short tube 2, on the other end of pressure measurement short tube 2, be connected with downhole joint 1, on downhole joint 1, be connected with pressure measuring instrument 12, on pressure transmission conduit 3, be communicated with L shaped sampling bend pipe 4, L shaped sampling bend pipe 4 is comprised of vertical section pipe 9 and horizontal segment pipe 8, the outer end of the vertical section pipe 9 of L shaped sampling bend pipe 4 is connected with pressure transmission conduit 3, the horizontal segment pipe 8 of L shaped sampling bend pipe 4 is that the steam flow pointing in measured tube road 11 carrys out flow path direction and comes flow path direction parallel with steam flow, top at the horizontal segment pipe 8 of L shaped sampling bend pipe 4 is provided with end semisphere block head 13, on the sidewall of horizontal segment pipe 8, be provided with four entrance pressure apertures 10 that wait radian interval, in the pipe of pressure transmission conduit 3, central point is to being provided with 4-8 L shaped sampling bend pipe 4 between the inner left wall of tested pipeline 11, in the pipe of pressure transmission conduit 3, central point is to being provided with 4-8 L shaped sampling bend pipe 4 between the right side inwall of tested pipeline 11, the L shaped sampling bend pipe 4 that the central point both sides of the pressure transmission conduit 3 in tested pipeline 11 arrange be take pressure transmission conduit 3 central point as symcenter symmetrically arranged.
Central point at pressure transmission conduit 3 is provided with between the inner left wall of tested pipeline 11
nindividual L shaped sampling bend pipe 4, the
idistance between individual L shaped sampling bend pipe 4 and the central point of pressure transmission conduit 3
meet following formula:
.
The diameter of L shaped sampling bend pipe 4 is 1:4-1:3 with the diameter ratio of pressure transmission conduit 3; The ratio of horizontal segment pipe 8 and vertical section pipe 9 is between 1:1.5-1:2; The length of horizontal segment pipe 8 be L shaped sampling bend pipe 4 diameter 8-10 doubly.
On pressure measurement short tube 2, be provided with the incoming flow direction sign small gap 5 of fluid in tested pipeline 11.
The quantity of the present invention's L shaped measurement bend pipe on pressure transmission conduit 3 is arranged 4-8 L shaped sampling bend pipe in the radius size of tested pipeline 11, and sampling bend pipe is in supravasal installation site, according to the internal diameter size of tested pipeline 11
with sample tap quantity
n, by following formula, determine:
In formula:
-the
iindividual sampling elbow is apart from the distance of pressure transmission catheter center;
i=1、2、3------
n；
With
nget 8 for example, different sampling spots apart from the centre distance of conduit and the pass of internal diameter of the pipeline are:
；
；
? 。
When the present invention uses in reality, need be along tested pipeline 11 diametric(al) two ends perforates, opening diameter need be greater than respectively bigger diameter end plate 6 and path end plate 7, pressure transmission element inserts to small bore end along macropore, and making the sampling section 8 of L shaped sampling bend pipe 4 come flow path direction parallel with steam flow in pipeline, the end ball joint head of sampling section 8 is over against carrying out flow path direction.Pressure transmission element in place firm with pipeline welding after, pressure instrumentation is installed and is can be used as permanent measuring point and use.
Pressure transmission element of the present invention, sampling spot is many, and covers the diameter range of whole pipeline, can accurately measure the mean pressure in pipe, and has the feature being connected firmly with pipeline easy for installation.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310115355.0A CN103226051B (en) | 2013-04-06 | 2013-04-06 | Pressure transmitting element for large-diameter negative pressure steam pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310115355.0A CN103226051B (en) | 2013-04-06 | 2013-04-06 | Pressure transmitting element for large-diameter negative pressure steam pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN103226051A CN103226051A (en) | 2013-07-31 |
| CN103226051B true CN103226051B (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310115355.0A Active CN103226051B (en) | 2013-04-06 | 2013-04-06 | Pressure transmitting element for large-diameter negative pressure steam pipeline |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749569B (en) * | 2016-04-07 | 2017-12-29 | 四川省康鑫化工有限公司 | Afterheat energy-saving akali sulphide concentration evaporator |
| CN108267261B (en) | 2016-12-30 | 2019-12-13 | 北京金风科创风电设备有限公司 | Electric connector, fluid state testing device and fluid heat exchange system |
| CN108267260B (en) * | 2016-12-30 | 2019-05-17 | 北京金风科创风电设备有限公司 | Electrical connections, fluid state testing devices, and fluid heat exchange systems |
| WO2018120747A1 (en) * | 2016-12-30 | 2018-07-05 | 北京金风科创风电设备有限公司 | Electrical connector, fluid state test device, and fluid heat exchange system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4393692A (en) * | 1978-02-21 | 1983-07-19 | The Garrett Corporation | Static pressure probe and method |
| JP2002156300A (en) * | 2000-11-20 | 2002-05-31 | Hitachi Building Systems Co Ltd | Water pressure measuring device |
| CN201382839Y (en) * | 2009-03-20 | 2010-01-13 | 山东福田药业有限公司 | Pressure measuring and pressuring device |
| CN202676359U (en) * | 2012-06-21 | 2013-01-16 | 卿毅 | Pressure-tapping measuring device |
| CN203224331U (en) * | 2013-04-06 | 2013-10-02 | 国家电网公司 | A pressure transmitting component used for a large-diameter negative pressure steam pipeline |
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