CN103226051A - Pressure transmitting element for large-diameter negative pressure steam pipeline - Google Patents

Pressure transmitting element for large-diameter negative pressure steam pipeline Download PDF

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Publication number
CN103226051A
CN103226051A CN2013101153550A CN201310115355A CN103226051A CN 103226051 A CN103226051 A CN 103226051A CN 2013101153550 A CN2013101153550 A CN 2013101153550A CN 201310115355 A CN201310115355 A CN 201310115355A CN 103226051 A CN103226051 A CN 103226051A
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CN
China
Prior art keywords
pressure
pipe
pressure transmission
shaped sampling
bend pipe
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CN2013101153550A
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Chinese (zh)
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CN103226051B (en
Inventor
王进
李庆华
石红晖
马庆中
于天群
续宏
原树峰
郭强
白志刚
卢家勇
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国家电网公司
山西省电力公司电力科学研究院
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Priority to CN201310115355.0A priority Critical patent/CN103226051B/en
Publication of CN103226051A publication Critical patent/CN103226051A/en
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Publication of CN103226051B publication Critical patent/CN103226051B/en

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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

The pressure transmission element that is used for major diameter negative pressure steam pipework
Technical field
The present invention relates to a kind of pressure transmission element that is used for major diameter negative pressure steam pipework, particularly a kind of tonometric pressure transmission element that is used for that is provided with in the steam-distributing pipe that in the Direct Air-cooled Unit gland steam exhauster, reaches.
Background technology
Pressure is important hydrodynamic force parameter, in negative pressure system, because absolute pressure is low, satisfy certain measuring accuracy, the pressure transmission element has been proposed 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 the 50-110 meter per second.The pressure survey of exhaust line generally be adopt on the pipeline directly perforate measure near the pressure tube wall, because large diameter pipeline keeps at a certain distance away bearing rib in telescopic joint compensation system and the pipe 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 be represented the mean pressure of the fluid of whole pipeline.
Summary of the invention
The invention provides a kind of pressure transmission element that is used for major diameter negative pressure steam pipework, solved the existing measuring accuracy of existing opening sampling method and be subjected to the tube fluid inhomogeneous technical matters that influences that flows easily.
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, correspondence is respectively arranged with bigger diameter end plate and path end plate on the tube wall of tested pipeline, the bigger diameter end plate is provided with the pressure transmission conduit and passes the hole, one end of pressure transmission conduit is fixedlyed connected with the path end plate, the other end of pressure transmission conduit is passed in the end connection that the pressure transmission conduit that is provided with on the bigger diameter end plate passes Kong Houyu pressure measurement short tube, be connected with the measurement joint on the other end of pressure measurement short tube, on the measurement joint, be connected with pressure measuring instrument, on the pressure transmission conduit, be communicated with L shaped sampling bend pipe, L shaped sampling bend pipe is made up 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 the pressure transmission conduit, the horizontal segment pipe of L shaped sampling bend pipe is that the steam flow that points in the measured tube road comes 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, the sidewall of horizontal segment pipe is provided with four and waits radian entrance pressure aperture at interval, 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 in the pipe of pressure transmission conduit, and the L shaped sampling bend pipe that the central point both sides of the pressure transmission conduit in tested pipeline are provided with is that the central point with the pressure transmission conduit is that symcenter is symmetrically arranged.
Central point at the pressure transmission conduit is provided with between the inner left wall of tested pipeline nIndividual L shaped sampling bend pipe, the iDistance between the central point of individual L shaped sampling bend pipe and pressure transmission conduit Satisfy 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 the 1:1.5-1:2; The length of horizontal segment pipe (8) be L shaped sampling bend pipe diameter 8-10 doubly.
What the pressure measurement short tube was provided with fluid in the tested pipeline comes flow path direction sign small gap.
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 to adopt homogeneous tube or multitube site welding mode according to pipeline external diameter size.
Be welded with L shaped sampling bend pipe on the pressure transmission conduit, 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 is measured 4-8, forms multiple spot and all presses measurement, can obtain the mean pressure in cross section.
Path end plate at pressure transmission conduit one end plays plugging action, the bigger diameter end plate perforate of the other end with and the pressure transmission conduit with the pressure measuring tie-in short tube welding in footpath, the part polishes and forms small gap and represent flow path direction on the pressure measuring tie-in short tube, so that determine installation position during actual installation.Can adopt right-angled intersection layout two cover pressure transmission elements to measure during practical application, 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, the cost performance height is specially adapted to the pressure samples of the pressure test of exhaust line system and the SR test of Direct Air-cooled Unit.
Description of drawings
Fig. 1 is a 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 synoptic diagram.
Embodiment
A kind of major diameter negative pressure steam pipework pressure survey pressure transmission element, comprise tested pipeline 11, correspondence is respectively arranged with bigger diameter end plate 6 and path end plate 7 on the tube wall of tested pipeline 11, bigger diameter end plate 6 is provided with the pressure transmission conduit and passes the hole, one end of pressure transmission conduit 3 is fixedlyed connected with path end plate 7, the other end of pressure transmission conduit 3 is passed in the end connection that the pressure transmission conduit that is provided with on the bigger diameter end plate 6 passes Kong Houyu pressure measurement short tube 2, be connected with on the other end of pressure measurement short tube 2 and measure joint 1, on measurement 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 made up 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 that points in the measured tube road 11 comes 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, the sidewall of horizontal segment pipe 8 is provided with four and waits radian entrance pressure aperture 10 at interval, 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 in the pipe of pressure transmission conduit 3, and the L shaped sampling bend pipe 4 that the central point both sides of the pressure transmission conduit 3 in tested pipeline 11 are provided with is that the central point with pressure transmission conduit 3 is that symcenter is 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 the central point of individual L shaped sampling bend pipe 4 and pressure transmission conduit 3 Satisfy 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 the 1:1.5-1:2; The length of horizontal segment pipe 8 be L shaped sampling bend pipe 4 diameter 8-10 doubly.
What pressure measurement short tube 2 was provided with fluid in the tested pipeline 11 comes flow path direction sign small gap 5.
The present invention arranges 4-8 L shaped sampling bend pipe in the quantity of L shaped measurement bend pipe on the pressure transmission conduit 3 on the radius size of tested pipeline 11, the sampling bend pipe is in supravasal installation site, according to the internal diameter size of tested pipeline 11 With sample tap quantity n, press following formula and determine:
In the formula: -the iIndividual sampling elbow is apart from the distance of pressure transmission catheter center;
i=1、2、3------ n;
With nGet 8 and be 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 along tested pipeline 11 diametric(al) two ends perforates, opening diameter needs respectively greater than bigger diameter end plate 6 and path end plate 7, the 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 the interior steam flow of pipeline, the end ball joint head of sampling section 8 is over against coming flow path direction.The pressure transmission element in place with pipeline welding firm after, pressure instrumentation is installed 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 pipe, can accurately measure the mean pressure in the pipe, and has the characteristics that are connected firmly with pipeline easy for installation.

Claims (4)

1. major diameter negative pressure steam pipework pressure survey pressure transmission element, comprise tested pipeline (11), correspondence is respectively arranged with bigger diameter end plate (6) and path end plate (7) on the tube wall of tested pipeline (11), it is characterized in that, bigger diameter end plate (6) is provided with the pressure transmission conduit and passes the hole, one end of pressure transmission conduit (3) is fixedlyed connected with path end plate (7), the other end of pressure transmission conduit (3) is passed in bigger diameter end plate (6) and goes up the end connection that the pressure transmission conduit that is provided with passes Kong Houyu pressure measurement short tube (2), be connected with on the other end of pressure measurement short tube (2) and measure joint (1), on measurement 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 made up 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 that points in the measured tube road (11) comes 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), the sidewall of horizontal segment pipe (8) is provided with four and waits radian entrance pressure aperture (10) at interval, 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) in the pipe of pressure transmission conduit (3), and the L shaped sampling bend pipe (4) that the central point both sides of the pressure transmission conduit (3) in tested pipeline (11) are provided with is that the central point with pressure transmission conduit (3) is that symcenter is symmetrically arranged.
2. a kind of major diameter negative pressure steam pipework pressure survey pressure transmission element according to claim 1 is characterized in that, is provided with between the inner left wall of tested pipeline (11) at the central point of pressure transmission conduit (3) nIndividual L shaped sampling bend pipe (4), the iDistance between the central point of individual L shaped sampling bend pipe (4) and pressure transmission conduit (3) Satisfy following formula:
3. a kind of major diameter negative pressure steam pipework pressure survey pressure transmission element according to claim 1 and 2 is characterized in that, the diameter of the diameter of L shaped sampling bend pipe (4) and pressure transmission conduit (3) is than being 1:4-1:3; The ratio of horizontal segment pipe (8) and vertical section pipe (9) is between the 1:1.5-1:2; The length of horizontal segment pipe (8) be L shaped sampling bend pipe (4) diameter 8-10 doubly.
4. a kind of major diameter negative pressure steam pipework pressure survey pressure transmission element according to claim 1 and 2 is characterized in that, what pressure measurement short tube (2) was provided with fluid in the tested pipeline (11) comes flow path direction sign small gap (5).
CN201310115355.0A 2013-04-06 2013-04-06 Pressure transmitting element for large-diameter negative pressure steam pipeline CN103226051B (en)

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CN103226051B CN103226051B (en) 2014-09-03

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105749569A (en) * 2016-04-07 2016-07-13 四川省康鑫化工有限公司 Residual heat energy-saving type sodium sulfide concentration evaporator
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
CN108267261A (en) * 2016-12-30 2018-07-10 北京金风科创风电设备有限公司 Electrical connector, fluid state test device and fluid heat transfer system
CN108267260A (en) * 2016-12-30 2018-07-10 北京金风科创风电设备有限公司 Electrical connector, fluid state test device and fluid heat transfer system

Citations (5)

* Cited by examiner, † Cited by third party
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 apparatus
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 apparatus
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105749569A (en) * 2016-04-07 2016-07-13 四川省康鑫化工有限公司 Residual heat energy-saving type sodium sulfide concentration evaporator
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
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
CN108267261A (en) * 2016-12-30 2018-07-10 北京金风科创风电设备有限公司 Electrical connector, fluid state test device and fluid heat transfer system
CN108267260A (en) * 2016-12-30 2018-07-10 北京金风科创风电设备有限公司 Electrical connector, fluid state test device and fluid heat transfer system
CN108267260B (en) * 2016-12-30 2019-05-17 北京金风科创风电设备有限公司 Electrical connector, fluid state test device and fluid heat transfer system
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
US10641786B2 (en) 2016-12-30 2020-05-05 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Fluid test device with electrical connector having electric heating tube for heat exchange process

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