CN2314349Y - Rotz flowmeters with improved wheel - Google Patents
Rotz flowmeters with improved wheel Download PDFInfo
- Publication number
- CN2314349Y CN2314349Y CN 97220856 CN97220856U CN2314349Y CN 2314349 Y CN2314349 Y CN 2314349Y CN 97220856 CN97220856 CN 97220856 CN 97220856 U CN97220856 U CN 97220856U CN 2314349 Y CN2314349 Y CN 2314349Y
- Authority
- CN
- China
- Prior art keywords
- flowmeter
- waist wheel
- waist
- wheel
- facing sand
- 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
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Abstract
The utility model relates to a flow measuring instrument, particularly a volume type liquid flow continuously measuring instrument. The utility model is the improvement of the roots wheel of a roots flowmeter. The upper and the lower end surfaces of the roots wheel are designed into a step shape or an inclined plane shape, the contact width between an upper and a lower cap plates is reduced, and facing sand impurities in crude oil are reduced by the adhesive force of an upper and a lower caps after entering the flowmeter. Thereby, the danger that the flowmeter is clamped when the crude oil with high proportion facing sand passes through the flowmeter, and the flowmeter cuts oil transportation is effectively prevented.
Description
The utility model relates to a kind of instrument of measuring flow, the particularly instrument of positive displacement continuous coverage fluid flow.
Rotz flowmeter is a kind of volume flow measuring instrument, is used for the liquid volume flow that flows through in the continuous coverage pipeline.Being widely used in the accurate measurement of oil and petroleum product, is the instrument of oil pipeline indispensability.
Rotz flowmeter commonly used at present is shown in Fig. 7-9, and Fig. 1 is its profile and phantom view, and Fig. 3 is waist wheel rotation synoptic diagram, and Fig. 7 is the schematic perspective view of its measurement chamber inner assembly combination.When fluid to be measured is flowed through measurement chamber, the entrance end of flowmeter forms a pressure reduction, under this pressure, make waist wheel 3 ' rotation (shown in 3), make the rotation of two waist wheel 3 ' driven by the driven wheel on the waist wheel shaft 7 10 simultaneously, because the volume of measurement chamber is a certain value, so the flow of fluid to be measured is directly proportional with waist wheel 3 ' revolution, by gear, go out shaft sealing mechanism 12 and precision corrector 13 and be delivered to counter 14 integrating volumetric flow rates.
According to the size of flowmeter bore, waist wheel 3 ' can be individual layer waist wheel or double-deck waist wheel construction.Waist wheel 3 ' lower end and 6 of lower covers, upper end and 6 of upper cover plates, waist wheel 3 ' and housing between, double-deck waist wheel 3 ' upper and lower waist wheel 3 ' and 4 gaps that all maintain less than 1mm of central dividing plate, make waist take turns 3 ' can be under the promotion of import and export fluid pressure differential and rotate.
Above-mentioned excesssive gap then measures inaccurate, too small then very easily the obstruction by the solid impurity in the liquid in gap and cause waist wheel 3 ' cisco unity malfunction even be stuck.
For the ducted flowmeter of conveying crude oil, owing to often be mingled with the different impurity of particle in the crude oil, thin approaching face powdery, be commonly called as facing sand, big can be suitable with the grain of rice, so filtrator all will be set to filter out impurities in the place ahead of flowmeter, but the mesh of filtrator is too small, can often be stopped up by impurity, especially the obstruction of facing sand is even more serious, so the filtrator that is provided with generally all allows facing sand pass through smoothly, so facing sand is a principal element of seriously stopping up flowmeter, especially late period the oil field, the early stage oil field of the facing sand impurity that is mingled with in the crude oil is much more, this just more has a strong impact on the smoothness of oil pipeline.
It mainly is between rotating part and stationary part that facing sand stops up flowmeter, be waist wheel 3 ' on, lower end 32 ' with last, gap between lower cover 6 and 5 (or central dividing plate 4) is the easiest to be blocked, the wall 34 of taking turns 3 ' both sides hollow posts body 30 when waist is thick more, two ends 32 ' then with last, lower cover 6 and 5 surface of contact are big more, facing sand residual on the surface of contact is just many more, the clinging power that produces on the surface of contact is just big more, when oil pressure is lower than clinging power and can not overcomes, waist wheel 3 ' will be blocked clogs, have only that flowmeter could operate as normal during much larger than this clinging power when oil pressure, crude oil could be unimpeded.
The purpose of this utility model is that the waist wheel that provides a kind of does not have meter, promptly keep under the condition of waist wheel thickness as outside (promptly keeping its intensity), reduce the contact area between waist wheel upper/lower terminal and upper and lower cover plate (or central dividing plate) as far as possible, the facing sand clinging power that makes the residual facing sand amount minimizing between waist wheel top and upper and lower cover plate (or central dividing plate) and cause between the gap reduces, make the facing sand clinging power all the time much smaller than oil pressure, thereby prevented that effectively the waist wheel is blocked.
The utility model is achieved in that the waist wheel is that two hollow cylindrical body and axle center part are formed the cylindrical body of cross section like a kidney shape by two sides.There is the axis hole that passes waist wheel shaft the centre, vertical with axis hole have a bolt hole, the nationality bolt is fixed on the waist wheel on the waist wheel shaft, it is characterized in that being designed to step-like or inclined plane shape in the outer ring of the upper/lower terminal of waist wheel, make contact width between two ends and upper and lower cover plate (or central dividing plate) much smaller than the thickness of cylindrical body, promptly reduce to b from original a, so both contacts area significantly reduce, thereby the clinging power of the facing sand generation that remains on the surface of contact is greatly reduced, prevented that the waist wheel is stuck, allowed facing sand can waltz through flowmeter.
The utility model compared with the prior art, its advantage is only to change the contact width between waist wheel both ends of the surface and upper and lower cover plate (or central dividing plate), and do not reduce wall thickness (promptly not reducing the intensity of cylindrical body) waist wheel is significantly reduced and upper and lower cover plate (or central dividing plate) between contact area and clinging power, the both ends of the surface that make facing sand can not be gathered in the waist wheel easily by flowmeter are stuck flowmeter, have guaranteed the operate as normal of flowmeter.Thereby the crude oil that effectively prevents to have facing sand at high proportion during by flowmeter stuck flowmeter interrupt the danger of oil transportation.
Description of drawings:
Fig. 1 is rotz flowmeter profile and phantom view
Fig. 2 is the schematic perspective view of the utility model measurement chamber inner assembly combination
Fig. 3 is waist wheel rotation synoptic diagram
Fig. 4 is the cut-open view b-ramp type and the vertical view c of the utility model step waist wheel
Fig. 5 is the phantom view of the utility model ramp type waist wheel
Fig. 6 is the vertical view of the utility model waist wheel
Fig. 7 is the schematic perspective view of prior art measurement chamber inner assembly combination
Fig. 8 is the cut-open view of prior art waist wheel
Fig. 9 is the vertical view of prior art waist wheel
Figure number
1-housing 2-waist wheel chamber
3-waist wheel 30-hollow posts body 31-waist wheel outer ring 32-waist wheel end face
33-axis hole 34-Cylinder wall 35-axle center part
36-bolt hole 37-step 39-inclined-plane
4-central dividing plate 5-lower cover 6-upper cover plate 7-waist wheel shaft
8-end cap 9-driven wheel 10-transverse bearing 11-loam cake
12-goes out the accurate corrector 14-of shaft sealing mechanism 13-counter
3 '-waist wheel 32-waist wheel end face
Accompanying drawing is described in conjunction with the embodiments
Waist wheel 3 of the present utility model is that two hollow cylindrical body 30 and axle center part 35 are formed the cylindrical body of cross section like a kidney shape by two sides, there is the axis hole 33 that passes waist wheel shaft 7 centre, vertical with axis hole 33 have a bolt hole 36, the nationality bolt is fixed on waist wheel 3 on the waist wheel shaft 7, the wall 34 thickness a of hollow cylindrical body 30 are big more, on the waist wheel 3, following biend 32 is promptly with last, contact area between lower cover 6 and 5 (or central dividing plate 4) is also big more, it is characterized in that on waist wheel 3, following two ends 32 are designed to step-like 37 or inclined plane shape 39, make the two ends 32 can be with last, contact width between lower cover 6 and 5 (or central dividing plate 4) is much smaller than the wall thickness 34 of cylindrical body 30, promptly reduce to b from original a, so both contacts area significantly reduce, thereby the clinging power that facing sand is produced on surface of contact greatly reduces, prevented that waist from taking turns 3 stuckly, allowed facing sand can waltz through flowmeter.Thereby the crude oil that effectively prevents to have facing sand at high proportion during by flowmeter stuck flowmeter interrupt the danger of oil transportation.
The width b that waist is taken turns 3 upper/lower terminal faces 32 is (0.1-0.4) with the ratio of cylindrical body wall thickness a: 1.
Claims (2)
1. the improved waist of rotz flowmeter is taken turns, by two sides is that two hollow cylindrical body (30) and axle center part (35) are formed the cylindrical body of cross section like a kidney shape, there is the axis hole (33) that passes waist wheel shaft (7) centre, with axis hole (33) perpendicular bolt hole (36) arranged, the nationality bolt is fixed on waist wheel (3) on the waist wheel shaft (7), it is a that hollow cylindrical is stopped the wall (34) of (30) thick, it is characterized in that on waist wheel (3), following two ends (32) are designed to step (37) shape or inclined-plane (39) shape, and waist wheel (3) two ends (32) are with last, contact width (32) between lower cover (6 and 5) [or central dividing plate (4)] is b.
2. the improved waist of rotz flowmeter according to claim 1 wheel is characterized in that the ratio of width b and the thickness of hollow posts body (30) wall (34) of the both ends of the surface (32) of waist wheel (3) is (0.1-0.4): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97220856 CN2314349Y (en) | 1997-07-28 | 1997-07-28 | Rotz flowmeters with improved wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97220856 CN2314349Y (en) | 1997-07-28 | 1997-07-28 | Rotz flowmeters with improved wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2314349Y true CN2314349Y (en) | 1999-04-14 |
Family
ID=33936414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97220856 Expired - Fee Related CN2314349Y (en) | 1997-07-28 | 1997-07-28 | Rotz flowmeters with improved wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2314349Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387532B (en) * | 2007-12-25 | 2010-06-16 | 上海埃科燃气测控设备有限公司 | Oil leak-proof gas roots flowmeter and oil leak-proof method |
| CN103487094A (en) * | 2013-10-16 | 2014-01-01 | 上海瓷熙仪器仪表有限公司 | Proportioning and metering device for ultramicro flow |
-
1997
- 1997-07-28 CN CN 97220856 patent/CN2314349Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387532B (en) * | 2007-12-25 | 2010-06-16 | 上海埃科燃气测控设备有限公司 | Oil leak-proof gas roots flowmeter and oil leak-proof method |
| CN103487094A (en) * | 2013-10-16 | 2014-01-01 | 上海瓷熙仪器仪表有限公司 | Proportioning and metering device for ultramicro flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |