CN204313894U - Measure steam flow pipe hole plate structure - Google Patents

Measure steam flow pipe hole plate structure Download PDF

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Publication number
CN204313894U
CN204313894U CN201420835625.5U CN201420835625U CN204313894U CN 204313894 U CN204313894 U CN 204313894U CN 201420835625 U CN201420835625 U CN 201420835625U CN 204313894 U CN204313894 U CN 204313894U
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CN
China
Prior art keywords
pipeline
orifice plate
measuring tube
welded
plate
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
CN201420835625.5U
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Chinese (zh)
Inventor
解颖
潘杰
胡易
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Filing date
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Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201420835625.5U priority Critical patent/CN204313894U/en
Application granted granted Critical
Publication of CN204313894U publication Critical patent/CN204313894U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a kind of measurement steam flow pipe hole plate structure, comprise measuring tube and orifice plate, described orifice plate is vertically fixed in measuring tube, and measuring tube two ends are welded with tested pipeline, and the measuring tube being positioned at orifice plate both sides establishes positive pressure port and negative pressure port respectively.Measuring tube is identical with tested pipeline specification material, and length is 80 ~ 120mm.Measuring tube is welded outside tube wall by pipeline section one and pipeline section two, and pipeline section one and pipeline section two joint offer symmetrical ring groove, and for fixing orifice plate, orifice plate and pipeline section one and pipeline section two are welded and fixed respectively.Compared with prior art, the beneficial effects of the utility model are: 1) solve flange join type AND DEWATERING FOR ORIFICE STRUCTURE because of gasket seal ageing failure and cause the difficult problem of steam leakage, economize energy; 2) structure is simple, makes, easy for installation, saves manpower, reduces orifice plate maintenance cost; 3) orifice plate is placed in pipeline completely, does not have exposed parts, and in steam, objectionable impurities is few, and wash away difference to orifice plate, the maintain and replace cycle is long.

Description

Measure steam flow pipe hole plate structure
Technical field
The utility model relates to a kind of steam flow detection device, particularly relates to a kind of measurement steam flow pipe hole plate structure.
Background technology
The high range of orifice plate and the supporting composition of differential pressure transmitter, temperature transmitter or pressure unit is than differential flow device, can measurement gas, steam, liquid flow, throttle orifice plate apparatus structure is simple, firm, stable and reliable for performance, operating period limit for length, price is lower, is therefore widely used in process control and the measurement in the fields such as oil, chemical industry, metallurgy, electric power, heat supply, water supply.
When using orifice plate to measure steam flow as primary detecting element (throttling element), vapor stream is when orifice plate, and speed increases, and pressure reduces, and the difference of the statical head of orifice plate both sides is just in time the difference of dynamic head in pipe.Conventional is integrated hole flowmeter at present, be made up of throttling element, ring casing, flange, holding ring, connecting pipe etc., orifice plate thickness is at 3 ~ 12mm, be arranged on ring casing inside, be bolted with flange, by the pressure reduction produced before and after orifice plate, weigh the size of fluid flow, and then calculate flow.
Application number is that the Chinese patent of 200820068517.4 (applying date is on July 17th, 2008) discloses one " integrated pressure-differential type steam flow meter ", application number is that the Chinese patent of 201220557271.3 (applying date is on October 27th, 2012) discloses one " integrated orifice-plate flowmeter ", in these two patents, measuring tube (pressure obtaning device cylindrical shell) both sides are equipped with ring flange and are connected with tested pipeline.Under ring casing orifice plate is in high temperature and high pressure environment, long-time use after, often there is leakage problem, considerably increase maintenance workload in the sealing gasket ageing failure of flange; The flange exposed in addition is connected with bolt and is subject to rainwater and corrosive gas and corrodes, and when changing sealing gasket, dismounting orifice plate is very difficult.Not only in actual use, adopt the AND DEWATERING FOR ORIFICE STRUCTURE of Flange joint to cause energy dissipation but also affect production, annual replacing pore plate by sealing pad and daily servicing orifice plate occupy a large amount of manpower.
Summary of the invention
The utility model provides a kind of measurement steam flow pipe hole plate structure, and the mode adopting measuring tube directly to weld with tested pipeline, stops gas leak phenomenon, reduces maintenance workload.
In order to achieve the above object, the utility model realizes by the following technical solutions:
Measure steam flow pipe hole plate structure, comprise measuring tube and orifice plate, described orifice plate is vertically fixed in measuring tube, and measuring tube two ends are welded with tested pipeline, and the measuring tube being positioned at orifice plate both sides establishes positive pressure port and negative pressure port respectively.
Described measuring tube is identical with tested pipeline specification material, and length is 80 ~ 120mm.
Described measuring tube is welded outside tube wall by pipeline section one and pipeline section two, and pipeline section one and pipeline section two joint offer symmetrical ring groove, and for fixing orifice plate, orifice plate and pipeline section one and pipeline section two are welded and fixed respectively.
Compared with prior art, the beneficial effects of the utility model are:
1) solving flange join type AND DEWATERING FOR ORIFICE STRUCTURE because of gasket seal ageing failure causes the difficult problem of steam leakage, economize energy;
2) structure is simple, makes, easy for installation, saves manpower, reduces orifice plate maintenance cost;
3) orifice plate is placed in pipeline completely, does not have exposed parts, and in steam, objectionable impurities is few, and wash away difference to orifice plate, the maintain and replace cycle is long.
Accompanying drawing explanation
Fig. 1 is Flange joint AND DEWATERING FOR ORIFICE STRUCTURE schematic diagram conventional at present.
Fig. 2 is structural representation of the present utility model.
In figure: 1. the rear negative pressure port of the ring casing 4. flange 5. sealing gasket 6. bolt 7. positive pressure pipe 8. negative pressure pipe 9. measuring tube 91. pipeline section 1 pipeline section 2 10. positive pressure port 12. of orifice plate 11. of ring casing 3. before ring casing inner hole plate 2.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
See Fig. 2, it is structural representation of the present utility model, the utility model measures steam flow pipe hole plate structure, comprise measuring tube and orifice plate, described orifice plate is vertically fixed in measuring tube, measuring tube two ends are welded with tested pipeline, and the measuring tube being positioned at orifice plate both sides establishes positive pressure port and negative pressure port respectively.
Described measuring tube is identical with tested pipeline specification material, and length is 80 ~ 120mm.
Described measuring tube is welded outside tube wall by pipeline section one and pipeline section two, and pipeline section one and pipeline section two joint offer symmetrical ring groove, and for fixing orifice plate, orifice plate and pipeline section one and pipeline section two are welded and fixed respectively.
Seeing Fig. 1, is Flange joint AND DEWATERING FOR ORIFICE STRUCTURE schematic diagram conventional at present.Its pressure obtaning device is made up of front ring casing, rear ring casing and the ring casing inner hole plate that is folded in middle part, orifice plate external diameter is greater than pipe diameter, the ring groove offered by front ring casing and rear ring casing is communicated with positive pressure pipe and negative pressure pipe, front ring casing and adopt Flange joint between rear ring casing and pipeline, establishes sealing gasket to seal between joint flange.This structure relative complex, respectively establishes a flange to be connected with pipeline before and after pressure obtaning device, namely there are two gas leakage points, sealing gasket is easy to ageing failure in high temperature environments, and therefore maintenance is very large.And the bolt at joint flange place connects because of outside being exposed to, easily corrode by rainwater or corrosive gas, or block screw connection point due to dust greasy dirt etc., dismantle very difficult.
The utility model measures steam flow pipe hole plate structure, adopt the measuring tube identical with tested pipeline directly and the version of pipeline welding, orifice plate is placed in pipeline completely, total is not easily affected by the external environment, because work in jet chimney, in steam, objectionable impurities is few, washes away difference to orifice plate, the AND DEWATERING FOR ORIFICE STRUCTURE maintain and replace cycle is long, does not therefore need frequent repair and replacement.The utility model easily makes, and saves material, reduces maintenance cost.
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1]
Orifice plate is processed: according to process design parameter, as Peak Flow Rate and conventional flow velocity, the density of medium, on-stream pressure, operating temperature, pipeline internal-and external diameter, the Media density of steam, calculate thickness and the pore size of orifice plate by principle of measurement, make processing orifice plate.
Measuring tube makes: select and tested pipeline material, the identical pipeline of specification, and intercept the pipeline section that 100mm is long, at pipeline section 1/2nd, place is blocked, and truncation surface is also interface during assembling.Pipeline section one bores the circular hole of Φ 14 as positive pressure port apart from interface 15.5mm place, bore the circular hole of Φ 14 as negative pressure port at pipeline section two apart from interface 16.5mm place.
Side milling dark 2mm, diameter 104mm ring groove in the tube wall of pipeline section one interface side, side milling dark 2mm, diameter 104mm ring groove in the tube wall of pipeline section two interface side equally, after the orifice plate that processes is placed and pipeline section one and pipeline section two docked in ring groove, just can realize the location of orifice plate in measuring tube and fix.
Orifice plate two end faces are welded with adjacent pipeline section one and pipeline section two inwall respectively, and inner surface of pipeline is cleaned out, then pipeline section one and pipeline section two are welded from outside joint, namely complete the manufacturing process of measuring tube
The form adopting ring casing and flange to clamp orifice plate is measured steam flow and is mainly considered that pressure obtaning device is unpicked and washed conveniently, but find through on-the-spot Long-Time Service, because jet chimney inner hole plate maintenance period is longer, when being substantially less than cleaning orifice, sealing gasket in ring casing will be out of shape aging because of High Temperature High Pressure, cause device to leak gas, and during maintenance, flange and bolt place dismantle because corrosion is very difficult.We carry out contrast experiment under different operating mode for this reason, namely on same pipeline, mounting flange interconnection system AND DEWATERING FOR ORIFICE STRUCTURE and the utility model carry out experimental data comparison simultaneously, result proves that measuring accuracy does not affect, and maintenance greatly reduces, current the utility model obtains positive promotion and application in Anshan iron and steel plant plant area.

Claims (3)

1. measure steam flow pipe hole plate structure, it is characterized in that, comprise measuring tube and orifice plate, described orifice plate is vertically fixed in measuring tube, and measuring tube two ends are welded with tested pipeline, and the measuring tube being positioned at orifice plate both sides establishes positive pressure port and negative pressure port respectively.
2. measurement steam flow pipe hole plate structure according to claim 1, it is characterized in that, described measuring tube is identical with tested pipeline specification material, and length is 80 ~ 120mm.
3. measurement steam flow pipe hole plate structure according to claim 1, it is characterized in that, described measuring tube is welded outside tube wall by pipeline section one and pipeline section two, pipeline section one and pipeline section two joint offer symmetrical ring groove, for fixing orifice plate, orifice plate and pipeline section one and pipeline section two are welded and fixed respectively.
CN201420835625.5U 2014-12-23 2014-12-23 Measure steam flow pipe hole plate structure Expired - Fee Related CN204313894U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420835625.5U CN204313894U (en) 2014-12-23 2014-12-23 Measure steam flow pipe hole plate structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420835625.5U CN204313894U (en) 2014-12-23 2014-12-23 Measure steam flow pipe hole plate structure

Publications (1)

Publication Number Publication Date
CN204313894U true CN204313894U (en) 2015-05-06

Family

ID=53136201

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420835625.5U Expired - Fee Related CN204313894U (en) 2014-12-23 2014-12-23 Measure steam flow pipe hole plate structure

Country Status (1)

Country Link
CN (1) CN204313894U (en)

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

Granted publication date: 20150506

Termination date: 20191223