CN203224331U - A pressure transmitting component used for a large-diameter negative pressure steam pipeline - Google Patents
A pressure transmitting component used for a large-diameter negative pressure steam pipeline Download PDFInfo
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- CN203224331U CN203224331U CN 201320165061 CN201320165061U CN203224331U CN 203224331 U CN203224331 U CN 203224331U CN 201320165061 CN201320165061 CN 201320165061 CN 201320165061 U CN201320165061 U CN 201320165061U CN 203224331 U CN203224331 U CN 203224331U
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- pressure
- pipe
- pressure transmission
- shaped sampling
- bend pipe
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- 238000005070 sampling Methods 0.000 claims abstract description 57
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 61
- 238000009530 blood pressure measurement Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 241000309551 Arthraxon hispidus Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000381142 Pachydermia Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Abstract
The utility model discloses a pressure transmitting component used for a large-diameter negative pressure steam pipeline, and solves the problem of the conventional opening sampling methods that test precision is susceptible to the influence of nonuniform flowing of fluid in a pipeline. A pressure transmitting pipe (3) is arranged in a to-be-tested pipeline (11). The pressure transmitting pipe (3) is communicated with L-shaped sampling bend pipes (4). A transverse pipe section (8) of the each L-shaped sampling bend pipe (4) points to an inflow direction of the stream flow of the to-be-tested pipeline (11) and is parallel to the inflow direction of the stream flow. The side wall of the transverse section of pipe (8) is provided with four pressure entering holes (10) equally spaced by radians. The 4-8 L-shaped sampling bend pipes (11) are arranged between a center point inside the pressure transmitting pipe (3) and the left side inner wall of the to-be-tested pipeline (11).. The pressure transmitting component used for the large-diameter negative pressure steam pipeline is applicable to pressure tests and pressure sampling of system resistance tests of steam exhaust pipe systems of direct air cooling sets.
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 tonometric pressure transmission element that is used for that arranges 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 at 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 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 arranges 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, be connected with pressure measuring instrument at the measurement joint, be communicated with L shaped sampling bend pipe at the pressure transmission conduit, 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 arrange 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 the on-the-spot welding manner of multitube according to pipeline external diameter size.
Be welded with L shaped sampling bend pipe at 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 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 arranges 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, be connected with pressure measuring instrument 12 at measurement joint 1, be communicated with L shaped sampling bend pipe 4 at pressure transmission conduit 3, 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 arrange 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 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 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 firm with pipeline welding 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 arranges 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), be connected with pressure measuring instrument (12) at measurement joint (1), be communicated with L shaped sampling bend pipe (4) at pressure transmission conduit (3), 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) arrange 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320165061 CN203224331U (en) | 2013-04-06 | 2013-04-06 | A pressure transmitting component used for a large-diameter negative pressure steam pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320165061 CN203224331U (en) | 2013-04-06 | 2013-04-06 | A pressure transmitting component used for a large-diameter negative pressure steam pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224331U true CN203224331U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320165061 Expired - Lifetime CN203224331U (en) | 2013-04-06 | 2013-04-06 | A pressure transmitting component used for a large-diameter negative pressure steam pipeline |
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| Country | Link |
|---|---|
| CN (1) | CN203224331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226051A (en) * | 2013-04-06 | 2013-07-31 | 国家电网公司 | Pressure transmitting element for large-diameter negative pressure steam pipeline |
-
2013
- 2013-04-06 CN CN 201320165061 patent/CN203224331U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226051A (en) * | 2013-04-06 | 2013-07-31 | 国家电网公司 | Pressure transmitting element for large-diameter negative pressure steam pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20140903 |
|
| RGAV | Abandon patent right to avoid regrant |