CN2112802U - U-shaped centrifugal flowmeter - Google Patents
U-shaped centrifugal flowmeter Download PDFInfo
- Publication number
- CN2112802U CN2112802U CN 91229570 CN91229570U CN2112802U CN 2112802 U CN2112802 U CN 2112802U CN 91229570 CN91229570 CN 91229570 CN 91229570 U CN91229570 U CN 91229570U CN 2112802 U CN2112802 U CN 2112802U
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- straight tube
- semicircle
- mozzle
- flowmeter
- centrifugal
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Abstract
The utility model relates to a U-shaped centrifugal flowmeter which is composed of an inlet straight pipe, an outlet straight pipe, and a semi-circle flow-guiding pipe. The inner and outer side walls of the semi-circle flow-guiding pipe which has the distance with the inlet straight pipe in 120 DEG to 160 DEG are provided with 3 to 5 pressure sampling holes which is arranged uniformly and symmetrical radially. A pressure sampling chamber is arranged at the inner and outer side walls of the pressure sampling hole, and the lower part of the pressure sampling chamber is opened and is connected with a hollow pipe. The hollow pipe is lined with an anticorrosion and high-smoothness engineering material which has the same structure with the body structure. The utility model has the advantages of simple structure, low cost, high measuring precision and can be used for a petroleum industry, a chemical industry, a metallurgical industry, an environmental industry and other industrial departments.
Description
The utility model relates to a kind of measurement of fluid flow meter, especially recover the oil and sewage disposal process in, the measurement of fluid flow meter of use.
In oil extraction process, in order promptly and accurately grasp to recover the oil dynamically, for oil field reasonable development and production provide authentic data, the metering of crude oil is an important techniques and level of control.
Chinese patent 85107483 discloses a kind of " cyclic centrifugal formula flowmeter ", and it is made up of water inlet pipe, annular guide channel, pressure port, cover clamp, rising pipe.The flow section of water inlet pipe, annular guide channel, rising pipe is rectangle or square, and is communicated with, and flow section equates.Be provided with diaphragm in the annular guide channel, settle the guide groove bottom between a side is perpendicular to fluid inlet and outlet, and opposite side becomes 40～60 ° of angles with the water outlet window.Fluid flows into from water inlet pipe, along the flow through differential pressure pressure port in downstream of annular guide channel, measures because the inside and outside side pressure that centrifugal force produced is poor.Fluid continues to flow through diaphragm after water outlet window, rising pipe flow out along annular guide channel.Above-mentioned " cyclic centrifugal formula flowmeter " weak point is complex structure, the technological requirement height, and fluid causes the actual flow loss bigger with the data error that theoretical formula derives in the secondary flow that ring groove produced.
The purpose of this utility model is to overcome above-mentioned weak point, provides a kind of simple in structure, and cost is low, the measuring accuracy height, and the change of flow state influence is little, and flow rate calculation is similar to the fluid measurement meter of theoretical formula.
The technical essential that the utility model adopts is by the import straight tube, the outlet straight tube, and the centrifugal flowmeter of U-shaped that the semicircle mozzle is formed, an import straight tube and an end welding flange that exports straight tube, the other end are communicated with the welding of semicircle mozzle respectively; On the inside and outside sidewall of import straight tube center line θ=120 °～160 ° semicircle mozzle scopes, having 3～5 pressure ports that are evenly distributed up and down and radial symmetry, pressure port φ=2～6 millimeter; The pressure chamber is housed on the pressure port inside and outside wall, is lined with O-ring seal between semicircle mozzle and pressure chamber; The pressure chamber is connected with differential pressure transmitter with in one side perforate, the hole thread hollow pipe being housed; The pressure chamber is fixed by bolts on the sidewall of semicircle mozzle.
The technical essential that the utility model adopts also has: import straight tube, semicircle mozzle, outlet straight tube are cylinder iron, cast steel, steel plate, duroplasts makes, but and one-step casting, cast molding, be lined with the corrosion resistant identical, construction material that smoothness is high in the pipe with body construction.Secondly, import straight tube, semicircle mozzle, outlet straight tube overflow section are identical, and can form the length of side is 50～500 * 50～600 millimeters series of products.
Principle of work of the present utility model is: when fluid is done the circumference operation by import straight tube tangential direction inflow semicircle mozzle, generation one is acted on the centrifugal force of sidewall, its result causes semicircle mozzle the pressure port inboard and outside all to produce the centrifugal pressure increment, record with the high precision differential pressure transmitter: because the generation of centrifugal force, the size of the pressure differential △ P of lateral wall and the textural constant K of semicircle mozzle in the semicircle mozzle
0, mass rate size Qm and fluidised form Reynolds coefficients R e be relevant, three's relation derives following theory relation according to Bernoulli equation.
Qm＝K
0（△Pρ）
1／2／（1＋λ）
1／2…………（1）
(1) ρ is the density of fluid in the formula, and λ is resistance coefficient, K
0Be constant
Under laminar flow conditions, resistance coefficient has following formula:
λ／λ
0＝αDe
β（20＜De＜500）……（2）
(2) α, β are constant, λ in the formula
0For into and out of the resistance coefficient of straight tube under laminar flow conditions.De=(D/8Re)
1/2, D is the diameter of semicircle mozzle.
Under turbulent situation, λ/λ
0=1+ λ Re(D/2Re)
1/4(3)
(3) in the formula: λ
0Be the resistance coefficient under the import and export turbulent flow situation, γ is a constant.
When fluid flows to the semicircle mozzle by the import straight tube, pass through pressure port, record the pressure differential △ P of the inside and outside wall of semicircle mozzle by differential pressure transmitter, with in the process of iteration substitution formula (1), (2), (3) formula, just can accurately obtain in the unit interval flow by the semicircle mozzle.
Compared with prior art, the utility model has following good effect
1, owing to being rectangle or the square that size equates,, can guarantee the technical requirement and the machining precision of relevant structural parameters so be easy to machining into and out of straight tube.
2, the semicircle mozzle tangentially connects and is integral with importing and exporting straight tube, and each footpath flow section is impartial and at grade.Not having in the pipe influences the parts of change of flow state, so can guarantee the stability of fluid in pipe, improves measuring accuracy.
3, no necked-down section in the pipe, the deflection flow deflector.The loss that the integral body of the centrifugal flowmeter of U-shaped can once be cast or casting is successful, cost is low, the pressure loss is only second to 90 ° of elbows, working pressure is Design and Machining as required.
4, fluid metering precision: scale range than 5:1 scope in, error in dipping is ± 1%, for the fluid metering of different flow scope, as long as select different calibers, just can realize ± flow of 1% fluid.
5, the utility model be widely used in oil, chemical industry, control gold, industrial sector measurement of fluid flow such as environmental protection, light industry.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is the structural representation of the centrifugal flowmeter of the utility model U-shaped.
Fig. 2 is the vertical view of the centrifugal flowmeter of the utility model U-shaped.
Fig. 3 be the centrifugal flowmeter of the utility model U-shaped 2. with the influent stream pipe 1., outflow tube 5. differential pressure transmitter 3., 4. single card microcomputer assembles workflow diagram together.
Import and export straight tube (1), (9) mouth of pipe are welded with ring flange, link with bolt and influent stream pipe, outflow tube respectively.
Embodiment 2, with the centrifugal flowmeter of drawn-steel U-shaped, are made up of inlet channel, semicircle mozzle (6), outlet slot, cover clamp (2).Cover clamp (2) is connected with bolt with the import and export groove, forms U-shaped.Being lined with anticorrosion smoothness in the pipe is
5 fiberglass.The length of side D=H=75 millimeter of import and export straight tube (1) (9).Flow section evenly is the square of equidimension.Import and export straight tube (1), (9) bottom side length are L, L＞5D.The center line of semicircle mozzle (6) is R to the distance in the center of circle, R=1.5～5D.Be evenly distributed pressure port (4), (4 ') of φ=4 millimeter on the interior lateral wall of (1) 160 ° of semicircle mozzle of import straight tube (6), opening 4 up and down.Radial symmetry is answered in pressure port (4), (4 ') on the interior lateral wall of semicircle mozzle (6).In pressure port (4), (4 '), set up an opening pressure chamber (5), (5 ') on the inside and outside wall, below perforate (8), (8 ') link with the threaded hollow tubular of two ends car (3), (3 ').Be lined with O-ring seal (7), (7 ') between semicircle mozzle (6) and pressure chamber (5), (5 ').Semicircle mozzle (6), O-ring seal (7), (7 '), pressure chamber (5), (5 ') are riveted together.Whole process unit also carries out under sealing state.When fluid flows into semicircle mozzle (6) from import straight tube (1) with tangential direction,, measure because the external and internal pressure that centrifugal force produces is poor with differential pressure transmitter by pressure port (4), (4 ').Utilize formula (1), (2), (3) can calculate the flow that passes through semicircle mozzle (6) in the unit interval.Fluid continues to flow out along outlet straight tube (9).
Claims (5)
1, the centrifugal flowmeter of a kind of U-shaped, it comprises import straight tube, outlet straight tube, semicircle mozzle, cover clamp, pressure port, differential pressure transmitter, single card microcomputer, it is characterized in that: an import straight tube (1) and an end welding flange that exports straight tube (9), the other end are communicated with semicircle mozzle (6) welding respectively; On the interior lateral wall of import straight tube (1) center line θ=120 °～160 ° semicircle mozzles (6), having 3～5 pressure ports that are evenly distributed up and down (4), (4 '), Φ=2～6 millimeter and radial symmetry; On pressure port (4), (4 ') inside and outside wall, pressure chamber (5), (5 ') are housed; Be lined with O-ring seal (7), (7 ') between semicircle mozzle (6) and pressure chamber (5), (5 '); Pressure chamber (5), (5 ') have thread hollow pipe (3), (3 ') to be connected with the differential pressure variator on hole (8), (8 ') with one side porose (8), (8 '); Pressure chamber (5), (5) are connected on the semicircle mozzle (6).
2, according to the centrifugal flowmeter of the described U-shaped of claim 1, it is characterized in that: import straight tube (1), semicircle mozzle (6), outlet straight tube (9) are cylinder iron, cast steel, steel plate, duroplasts makes.
3, according to the centrifugal flowmeter of the described U-shaped of claim 1, it is characterized in that: being lined with anticorrosion, smoothness in import straight tube (1), semicircle mozzle (6), outlet straight tube (9) is
Construction material more than 5.
4, according to the centrifugal flowmeter of the described U-shaped of claim 1, it is characterized in that: import straight tube (1), semicircle mozzle (6) and outlet straight tube (9) can one-step castings, cast molding.
5, according to the centrifugal flowmeter of claims 1 described U-shaped, it is characterized in that: import straight tube (1), semicircle mozzle (6), outlet straight tube (9) overflow section are identical, can form the length of side and be 50～500 * 50～600 millimeters series of products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91229570 CN2112802U (en) | 1991-11-28 | 1991-11-28 | U-shaped centrifugal flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91229570 CN2112802U (en) | 1991-11-28 | 1991-11-28 | U-shaped centrifugal flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2112802U true CN2112802U (en) | 1992-08-12 |
Family
ID=4935044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91229570 Granted CN2112802U (en) | 1991-11-28 | 1991-11-28 | U-shaped centrifugal flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2112802U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759381A (en) * | 2012-07-06 | 2012-10-31 | 中国航空工业集团公司西安飞机设计研究所 | Low flow-velocity gas pressure difference type flow measuring device |
| CN103245387A (en) * | 2013-05-16 | 2013-08-14 | 西安开尔能源工程有限责任公司 | Small-liquid-amount gas-liquid two-phase oil well meter |
| CN108825201A (en) * | 2018-08-17 | 2018-11-16 | 昆山艾蓓蓓阀门有限公司 | A kind of oil gas sand separation metering skid complexes for oil and gas extraction wellhead equipment |
| CN111595395A (en) * | 2020-05-08 | 2020-08-28 | 中国矿业大学 | Accurate tunnel air volume monitoring system and method |
-
1991
- 1991-11-28 CN CN 91229570 patent/CN2112802U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759381A (en) * | 2012-07-06 | 2012-10-31 | 中国航空工业集团公司西安飞机设计研究所 | Low flow-velocity gas pressure difference type flow measuring device |
| CN103245387A (en) * | 2013-05-16 | 2013-08-14 | 西安开尔能源工程有限责任公司 | Small-liquid-amount gas-liquid two-phase oil well meter |
| CN108825201A (en) * | 2018-08-17 | 2018-11-16 | 昆山艾蓓蓓阀门有限公司 | A kind of oil gas sand separation metering skid complexes for oil and gas extraction wellhead equipment |
| CN111595395A (en) * | 2020-05-08 | 2020-08-28 | 中国矿业大学 | Accurate tunnel air volume monitoring system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |