CN205449172U - Structure of zero resistance orifice flowmeter and definite its flow correction coefficient - Google Patents
Structure of zero resistance orifice flowmeter and definite its flow correction coefficient Download PDFInfo
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- CN205449172U CN205449172U CN201521136874.6U CN201521136874U CN205449172U CN 205449172 U CN205449172 U CN 205449172U CN 201521136874 U CN201521136874 U CN 201521136874U CN 205449172 U CN205449172 U CN 205449172U
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- orifice plate
- flowmeter
- standard
- connecting tube
- standard orifice
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Abstract
The utility model discloses a no loss of pressure, accurate measuring structure of zero resistance orifice flowmeter and definite its flow correction coefficient have solved the problem that ordinary orifice flowmeter loss of pressure, throughput value are low. Including the connecting pipe, along radially setting up an orifice plate gate valve and two piezometer orifices on the connecting pipe, two piezometer orifices are located the both sides of orifice plate gate valve, the orifice plate gate valve includes the valve body, standard orifice plate and standard orifice plate's push -pull institution, push -pull institution is used for pushing standard orifice plate the connecting pipe or pulling out the connecting pipe, push -pull institution includes that standard orifice plate goes up along the radial connecting rod that sets up, the connecting rod includes the polished rod section, the screw rod section, the tip of polished rod section is fixed with standard orifice plate, the body of rod and the valve body clearance fit of polished rod section, the valve body is extended to the screw rod section, the one end screw -thread fit brake disc of screw rod period number outside the valve body, form the link gear, under the normality, standard orifice plate is located the valve body, under the measurement state, standard orifice plate is located the connecting pipe, and standard orifice plate is coaxial with the connecting pipe.
Description
Technical field
This utility model relates to orifice flowmeter technical field, particularly relates to a kind of zero resistance hole flowmeter and determines the structure of its discharge correction coefficient.
Background technology
Colliery negative pressure extraction system widely applies different size orifice flowmeter in order to measure methane gas flow, is also used for gas, the measurement of liquid supply in Fei Mei enterprise simultaneously.At present, fluid measurement main abacus effusion meter, Pitot tube, even speed tube, Venturi tube, nozzle flowmeter etc., be orifice flowmeter the most accurately.But, proved by production practices, above-mentioned a few class effusion meter all existing defects:
Orifice flowmeter, Venturi tube, nozzle flowmeter belong to restriction flowmeter, are to reduce fluid by basal area during effusion meter, make effusion meter two ends produce pressure reduction, thus measure flow.Restriction flowmeter actually installs resistance piece in the duct, and fluid will produce the pressure loss when by effusion meter, causes fluid flowing kinetic energy to reduce, reduces fluid throughput.Major defect is increased passage resistance and causes the pressure loss, reduces fluid throughput, reduces by efficiency, the most just extends by the time, adds cost payout.
Pitot tube, even speed tube are to carry out calculated flow rate by total head and the static pressure of fixed position in measurement pipe, though not producing the pressure loss, but its aperture, piezometry hole is the least, is arranged on easily blocking in pipe for a long time, if installing instant, each point position differs, and measures the most inaccurate.
Common restriction flowmeter is installed in the duct for a long time, creates the pressure loss, limits flow, in order to improve efficiency so wishing that the pressure loss of effusion meter is the least better.Under present circumstances, be badly in need of easy to use, the pressure loss is little, measure effusion meter accurate, with low cost.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that the loss of a kind of no pressure, the zero resistance hole flowmeter that accurately measures and the structure determining its discharge correction coefficient, solves the plain bore flowmeter pressure loss, problem that throughput is low.
The purpose of this utility model is achieved in that
A kind of zero resistance hole flowmeter, including connecting tube, an orifice plate gate valve and two pressure taps it are disposed radially in described connecting tube, described two pressure taps are positioned at the both sides of described orifice plate gate valve, described orifice plate gate valve includes valve body, first standard orifice plate and the push-pull mechanism of the first standard orifice plate, described push-pull mechanism for pushing connecting tube or pull-out connecting tube by the first standard orifice plate, described push-pull mechanism includes the connecting rod being disposed radially on the first standard orifice plate, described connecting rod includes light bar segment, spiro rod section, the end of described smooth bar segment is fixed with the first standard orifice plate, the body of rod of light bar segment and valve body matched in clearance, described spiro rod section extends valve body, the threaded one end that spiro rod section is positioned at outside valve body coordinates a brake disc, form link gear,
Under normality, described first standard orifice plate is positioned at valve body；Under measuring state, described first standard orifice plate is positioned at connecting tube, and described first standard orifice plate is coaxial with connecting tube.
In order to load each parts in valve, preferably, the valve body of described orifice plate gate valve includes the first half block being molded in connecting tube and the second half block being bolted on the first half block, described first half block, the second half block surround the receiving space of the first standard orifice plate, and described connecting tube is provided with the insertion hole of the first standard orifice plate.
In order to there is fluid leakage in preventing valve body, it is preferable that described first half block, the faying face of the second half block use rubber seal rings for seal.
Orifice plate gate valve uses parallel single disc formula, and interior liner, sealing ring are in order to seal, it is to avoid fluid is here formed as eddy current, also avoids flow measurement inaccuracy simultaneously.
Being connected on fluid line for the ease of connecting tube, it is preferable that described orifice plate gate valve is positioned at connecting tube middle part vertically, the two ends of described connecting tube arrange ring flange.
Preferably, described connecting tube, orifice plate gate valve use cast iron or carbon steel.
Preferably, described connecting tube is straight tube.
A kind of structure of the discharge correction coefficient determining zero resistance hole flowmeter, including fluid line, connect on described fluid line described zero resistance hole flowmeter, the second orifice flowmeter, described second orifice flowmeter is positioned at the downstream of zero resistance hole flowmeter, fixed installation the second standard orifice plate in second orifice flowmeter, described first standard orifice plate, the second standard orifice plate specification consistent.
In order to make the fluid stable before and after the second standard orifice plate, improve the certainty of measurement of the second orifice flowmeter, it is preferable that distance is fluid conduit inside diameters 20 to 40 times between described first standard orifice plate, the second standard orifice plate.
Owing to have employed technique scheme, this utility model has the advantages that
Orifice plate gate valve of the present utility model configures the first standard orifice plate according to flow measurement caliber, orifice plate gate valve uses mechanical system, the artificial brake disc that rotates turns off or on orifice plate gate valve, close orifice plate gate valve (inserting the first standard orifice plate) during flow measurement and measure work, open orifice plate gate valve after completing to make to be as good as with common pipe at gate valve, therefore, this utility model simple in construction, with low cost, can ensure that fluid line zero resistance is through-flow under normal conditions, no pressure loses；When measuring easy to use, measure accurately.
Zero resistance hole flowmeter and the second orifice flowmeter are installed in series on fluid line by the structure determining discharge correction coefficient of the present utility model, flow with gate valve regulated fluid pipeline, measure respectively in the case of a series of flow values, flow when first standard orifice plate is mentioned and puts down, by zero resistance hole flowmeter and the flow measurement value contrast of the second orifice flowmeter institute, dependency relation is found out from multi-group data, determine correction formula or the correction factor of zero resistance hole flowmeter so that it is certainty of measurement is higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of zero resistance hole flowmeter；
Fig. 2 is the schematic diagram of the structure of the discharge correction coefficient determining zero resistance hole flowmeter.
Reference
In accompanying drawing, 1 is connecting tube, and 2 is orifice plate gate valve, and 3 is brake disc, and 4 is the first standard orifice plate, and 5 is ring flange, and 6 is pressure tap, and 7 is connecting rod, and 8 is valve body, and 9 is fluid line, and 10 is the second standard orifice plate, and 11 is the second orifice flowmeter, and 12 is the second pressure tap.
Detailed description of the invention
See Fig. 1, it it is a kind of preferred embodiment of zero resistance hole flowmeter, including connecting tube 1, orifice plate gate valve 2 and two pressure taps 6 it are disposed radially in described connecting tube 1, described connecting tube 1 is straight tube, described orifice plate gate valve 2 is positioned at connecting tube 1 middle part vertically, and described two pressure taps 6 are arranged on the both sides of described orifice plate gate valve 2, and the two ends of described connecting tube 1 arrange ring flange 5.Described connecting tube 1, orifice plate gate valve 2 use cast iron or carbon steel.
Described orifice plate gate valve 2 includes valve body 8, first standard orifice plate 4 and the push-pull mechanism of the first standard orifice plate 4, described push-pull mechanism for pushing connecting tube 1 or pull-out connecting tube 1 by the first standard orifice plate 4, described push-pull mechanism includes the connecting rod 7 being disposed radially on the first standard orifice plate 4, described connecting rod 7 includes light bar segment, spiro rod section, the end of described smooth bar segment is fixed with the first standard orifice plate 4, the body of rod of light bar segment and valve body 8 matched in clearance, described spiro rod section extends valve body, the threaded one end that spiro rod section is positioned at outside valve body coordinates a brake disc 3, form link gear, during operation, rotating brake disc 3 by manpower promotes the first standard orifice plate 4 to move up and down to be turned on and off orifice plate gate valve.
In the present embodiment, the valve body of described orifice plate gate valve 2 includes that the first half block being molded in connecting tube 1 and the second half block being bolted on the first half block, described first half block, the faying face of the second half block use rubber seal rings for seal.Described first half block, the second half block surround the receiving space of the first standard orifice plate 4, and described connecting tube 1 is provided with the insertion hole of the first standard orifice plate 4.
Under normality, described first standard orifice plate 4 is positioned at valve body；During measurement, the first standard orifice plate 4 in valve body is pushed in connecting tube 1 by described push-pull mechanism, and described first standard orifice plate 4 and connecting tube 1 coaxial inner conductor, after being measured, the first standard orifice plate 4 is completely pulled out connecting tube 1 by described push-pull mechanism.
When measuring every time, close orifice plate gate valve in advance, measure after flow speed stability.Before and after closing due to orifice plate gate valve, the basal area at gate valve changes, so flow velocity, flow are also varied from, thus according to caliber, flow velocity, measured medium type, dielectric viscosity, operating temperature, operating pressure, flow, the first standard orifice flow meter will determine that correction coefficient is corrected, it is ensured that accurately.
Zero resistance hole flowmeter strictly observes the specification such as IS05167 " measuring the flow of the fluid being full of pipe with orifice plate ", " measuring gas discharge with the first standard orifice flow meter " GB/T21446-2008 and " the iron gate valve of universal valve Flange joint " GB/T12232-2005.
Another embodiment of zero resistance hole flowmeter:
Described orifice plate gate valve 2 and straight tube 1 use separate type, are connected with connecting tube bolt with ring flange, and the present embodiment other technologies feature is identical with previous embodiment.
See Fig. 2, for determining a kind of preferred embodiment of the structure of the discharge correction coefficient of zero resistance hole flowmeter, including fluid line 9, connect on described fluid line 9 described zero resistance hole flowmeter, the second orifice flowmeter 11, described second orifice flowmeter 11 is positioned at the downstream of zero resistance hole flowmeter, fixed installation the second standard orifice plate 10 in second orifice flowmeter 11, the both sides of the second standard orifice plate 10 are respectively provided with the second pressure tap 12, and the specification of described first standard orifice plate the 4, second standard orifice plate 10 is consistent.Between described first standard orifice plate the 4, second standard orifice plate 10 20 to 40 times that distance is fluid line 9 internal diameter.
Use the method that this structure determines discharge correction coefficient:
Flow with gate valve regulated fluid pipeline, measure respectively in the case of a series of flow values, flow when first standard orifice plate is mentioned and puts down, by zero resistance hole flowmeter and the flow measurement value contrast of the second orifice flowmeter institute, from multi-group data, find out dependency relation, determine correction formula or the correction factor of zero resistance hole flowmeter.
Finally illustrate is, preferred embodiment above is only in order to illustrate the technical solution of the utility model and unrestricted, although this utility model being described in detail by above preferred embodiment, but skilled artisan would appreciate that, in the form and details it can be made various change, without departing from this utility model claims limited range.
Claims (8)
1. a resistance hole flowmeter, including connecting tube, it is characterized in that: in described connecting tube, be disposed radially an orifice plate gate valve and two pressure taps, described two pressure taps are positioned at the both sides of described orifice plate gate valve, described orifice plate gate valve includes valve body, first standard orifice plate and the push-pull mechanism of the first standard orifice plate, described push-pull mechanism for pushing connecting tube or pull-out connecting tube by the first standard orifice plate, described push-pull mechanism includes the connecting rod being disposed radially on the first standard orifice plate, described connecting rod includes light bar segment, spiro rod section, the end of described smooth bar segment is fixed with the first standard orifice plate, the body of rod of light bar segment and valve body matched in clearance, described spiro rod section extends valve body, the threaded one end that spiro rod section is positioned at outside valve body coordinates a brake disc, form link gear,
Under normality, described first standard orifice plate is positioned at valve body；Under measuring state, described first standard orifice plate is positioned at connecting tube, and described first standard orifice plate is coaxial with connecting tube.
Zero resistance hole flowmeter the most according to claim 1, it is characterized in that: the valve body of described orifice plate gate valve includes the first half block being molded in connecting tube and the second half block being bolted on the first half block, described first half block, the second half block surround the receiving space of the first standard orifice plate, and described connecting tube is provided with the insertion hole of the first standard orifice plate.
Zero resistance hole flowmeter the most according to claim 2, it is characterised in that: described first half block, the faying face of the second half block use rubber seal rings for seal.
Zero resistance hole flowmeter the most according to claim 1, it is characterised in that: described orifice plate gate valve is positioned at connecting tube middle part vertically, and the two ends of described connecting tube arrange ring flange.
Zero resistance hole flowmeter the most according to claim 1, it is characterised in that: described connecting tube, orifice plate gate valve use cast iron or carbon steel.
Zero resistance hole flowmeter the most according to claim 1, it is characterised in that: described connecting tube is straight tube.
7. the structure of the discharge correction coefficient determining the arbitrary described zero resistance hole flowmeter of claim 1 to 6, it is characterized in that: include fluid line, connect on described fluid line described zero resistance hole flowmeter, the second orifice flowmeter, described second orifice flowmeter is positioned at the downstream of zero resistance hole flowmeter, fixed installation the second standard orifice plate in second orifice flowmeter, described first standard orifice plate, the second standard orifice plate specification consistent.
The structure of the discharge correction coefficient determining zero resistance hole flowmeter the most according to claim 7, it is characterised in that: distance is fluid conduit inside diameters 20 to 40 times between described first standard orifice plate, the second standard orifice plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136874.6U CN205449172U (en) | 2015-12-31 | 2015-12-31 | Structure of zero resistance orifice flowmeter and definite its flow correction coefficient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136874.6U CN205449172U (en) | 2015-12-31 | 2015-12-31 | Structure of zero resistance orifice flowmeter and definite its flow correction coefficient |
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| CN205449172U true CN205449172U (en) | 2016-08-10 |
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| CN201521136874.6U Expired - Fee Related CN205449172U (en) | 2015-12-31 | 2015-12-31 | Structure of zero resistance orifice flowmeter and definite its flow correction coefficient |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595789A (en) * | 2016-12-29 | 2017-04-26 | 广汉川亿石油科技有限公司 | Critical speed flowmeter and pipeline system |
-
2015
- 2015-12-31 CN CN201521136874.6U patent/CN205449172U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595789A (en) * | 2016-12-29 | 2017-04-26 | 广汉川亿石油科技有限公司 | Critical speed flowmeter and pipeline system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200812 Address after: Room 11-15, 5 / F, building 5, red star Macalline Life Plaza, 20 Tonghui Avenue, Wenlong street, Qijiang District, Chongqing Patentee after: Chongqing Neng Touyu new energy Co.,Ltd. Address before: 400802, No. 87, Qingxi bridge, Qijiang district (formerly Wansheng District, Chongqing) Patentee before: CHONGQING NANTONG MINING INDUSTRY Co.,Ltd. |
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| 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: 20160810 Termination date: 20211231 |