CN105157760A - Heavy caliber spiral wing water meter impeller gravity balance device and gravity balancing method - Google Patents
Heavy caliber spiral wing water meter impeller gravity balance device and gravity balancing method Download PDFInfo
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- CN105157760A CN105157760A CN201510506154.2A CN201510506154A CN105157760A CN 105157760 A CN105157760 A CN 105157760A CN 201510506154 A CN201510506154 A CN 201510506154A CN 105157760 A CN105157760 A CN 105157760A
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- impeller
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Abstract
The invention discloses a heavy caliber spiral wing water meter impeller gravity balance device and a gravity balancing method. The device is formed by an impeller box front part, an impeller box back part, a buoyancy assembly, a lining, magnetic steel, an annular adamantine spar, and an impeller. The method works in a way that a key component-impeller of a common spiral wing water meter is accurately designed; a feature that the impeller is co-affected by water buoyancy and gravity is employed, so water buoyancy equals to weight of water discharging liquid; comprehensive density of the impeller is designed to be close to water density, so a problem of loss due to gravity of the impeller larger than buoyancy during the work of the impeller can be solved; friction between the impeller and a center shaft can be reduced; and water meter sensitivity upon small flow can be improved.
Description
Technical field
The invention belongs to discharge metering field, particularly relate to a kind of impeller gravity balance device and gravitational equilibrium method thereof of heavy caliber spiral shell wing water meter.
Background technology
Large-diameter water meter is due to large discharge and the relatively little advantage of fluctuations in discharge scope, be often used for backbone pipeline, community summary table, the Source of Gateway Meter of industrial and mining enterprises, office building, the use regimen condition relative complex of its next stage, the water consumption of different time water meter differs greatly, potential peak usage amount is close to conventional flow Q3 flow, but minimum water consumption may only have 0.5% of Q3 flow, cause very large trouble like this to the configuration of water meter, common water meter cannot meet the requirement of wide use traffic.Because the flow of heavy caliber pipeline is generally difficult to anticipation, therefore during design, how Reasonable table is the problem of the unusual headache of current water undertaking, often occurs " heavy caliber low discharge, small-bore large discharge " phenomenon.Namely bigbore pipeline and water meter are often in the situation well below minimum flow and even initial-flow, and for the horizontal screw wing type water meter that low discharge performance is relatively poor, error in dipping is quite surprising.
Summary of the invention
The object of the invention is for prior art not enough, a kind of impeller gravity balance device and gravitational equilibrium method thereof of heavy caliber spiral shell wing water meter are provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of impeller gravitational equilibrium method of heavy caliber spiral shell wing water meter, the method is on the pros and cons of impeller, arrange the first buoyance module and the second buoyance module respectively, first buoyance module and the second buoyance module are made up of same material, and volume is identical; Volume and the density of buoyance module meet V
1ρ
1+ 2V
2ρ
2=(V
1+ 2V
2) ρ
3; Wherein, V
1for the volume of impeller, ρ
1for the density of impeller, V
2for the volume of buoyance module, ρ
2for the density of buoyance module, ρ
3for the density of water under normal temperature (20 DEG C).
Further, the preparation method of described first buoyance module and the second buoyance module is:
1. according to the mould of Impeller Design first buoyance module and the second buoyance module; And calculate target volume and the target density of buoyance module;
2. according to target density, by melting means more than 6g/10min PP material mix with gas-development agent certain proportion, obtain compound; Be specially: target density is 0.8 ~ 0.9g/mL, the quality of gas-development agent is 1.5% of PP quality of materials; Target density is 0.7 ~ 0.8g/mL, and the quality of gas-development agent is 3% of PP quality of materials; Target density is 0.6 ~ 0.7g/mL, and the quality of gas-development agent is 4.5% of PP quality of materials; Target density is 0.5 ~ 0.6g/mL, and the quality of gas-development agent is 6% of PP quality of materials;
3. compound step 2 obtained is injected in mould by injection machine, obtains the first buoyance module and the second buoyance module.
Further, the temperature of described injection machine first stage is 180 ~ 190 degree, and the temperature of subordinate phase is 140 ~ 150 degree, and the temperature of phase III is 140 ~ 150 degree, and nozzle temperature is 200 ~ 220 degree; Injection moulding pressure is 2.8 ~ 3.0MPa.
A kind of impeller gravity balance device of heavy caliber spiral shell wing water meter, described device comprises the first annular buoyance module, second annular buoyancy assembly, the first lining, the second lining, two magnet steel, first annular corundum, second annular corundum, circular arc corundum, impeller, plane corundum, impeller box rear portion and impeller box front portion;
Described impeller has the central shaft that two ends are protruded, the first annular buoyance module, and the second annular buoyancy assembly is nested in the two ends of central shaft respectively; Central shaft has central through hole, and the first lining and the second lining are embedded in the central through hole of central shaft from the two ends of central shaft respectively; First lining and the second lining all have central through hole, the first annular corundum and circular arc corundum embed successively be arranged on the first lining central through hole in, plane corundum and the second annular corundum and be embedded in the central through hole of the second lining successively; Described impeller has two magnet steel mounting holes, two magnet steel are arranged in magnet steel mounting hole respectively, and two magnet steel are respectively S pole magnet steel and N pole magnet steel;
Impeller box rear portion and impeller box front portion composition impeller box, impeller is arranged in impeller box, and impeller box rear portion and impeller box front portion all have center thimble, and the central term pin at impeller box rear portion is inserted in the central through hole of the first lining, withstands the first annular corundum; The central term pin of impeller box front portion is inserted in the central through hole of the second lining, withstands the second annular corundum.
Further, described first buoyance module and the second buoyance module all have two the first jacks, two pins and central through hole, the first jack layout alternate with pin; The central shaft surrounding of impeller has four the second jacks, the central through hole of the first buoyance module and the second buoyance module all coordinates with central shaft, the pin of the first buoyance module is inserted in two the second jacks respectively, and the end of pin extend in the first jack of the second buoyance module; The pin of the second buoyance module is inserted in all the other two second jacks respectively, and the end of pin extend in the first jack of the first buoyance module.
Further, described first buoyance module and the second buoyance module, the first buoyance module and the second buoyance module are made up of same material, and volume is identical; Volume and the density of buoyance module meet V
1ρ
1+ 2V
2ρ
2=(V
1+ 2V
2) ρ
3; Wherein, V
1for the volume of impeller, ρ
1for the density of impeller, V
2for the volume of buoyance module, ρ
2for the density of buoyance module, ρ
3for the density of water under normal temperature (20 DEG C).
Beneficial effect of the present invention is: by designing accurately the critical component impeller of common helical vane type water meter, utilize impeller can be subject to the coefficient feature of buoyancy of water and gravity in water, the weight that water arranges liquid is equaled by calculating buoyancy of water, the combined density of impeller is designed to the density close to water, thus because gravity is far longer than buoyancy when overcoming impeller work, make the problem that can produce larger friction force between impeller and thimble axle, the friction force between both can be reduced, improve the sensitivity of water meter when low discharge.In water metering field, there is important practical significance.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of impeller gravity balance device of heavy caliber spiral shell wing water meter;
Fig. 2 is the structural representation of impeller;
Fig. 3 is the structural representation of the first buoyance module and the second buoyance module;
Fig. 4 is the position view of central shaft and the second jack on impeller;
The structural representation of the mould that Fig. 5 obtains for the Impeller Design according to Fig. 4;
Fig. 6 is the vertical view of mould shown in Fig. 5;
In figure, first buoyance module 1, second buoyance module 10, first lining 2, second lining 9, magnet steel 3, the annular corundum 8 of first annular corundum 4, second, circular arc corundum 5, impeller 6, plane corundum 7, impeller box rear portion 11, impeller box front portion 12, centered cylinder 13, side cylinder 14, side circular hole 15, first jack 101, pin 102, central through hole 103, central shaft 61, magnet steel mounting hole 62, second jack 63.
Embodiment
Utilize impeller can be subject to the feature of the double action of buoyancy of water and gravity in water, utilize buoyancy of water to equal thinking that water arranges the weight of liquid, the present invention arranges the first buoyance module 1 and the second buoyance module 10 respectively on the pros and cons of impeller 6, first buoyance module 1 and the second buoyance module 10 are made up of same material, and volume is identical;
Suppose: the volume of impeller 6 is V
1, the density of impeller 6 is ρ
1, the volume of buoyance module is V
2, the density of buoyance module is ρ
2, under normal temperature (20 DEG C), the density of water is ρ
3.
According to Archimedes principle, F is floating=and G liquid row=ρ liquid gV arranges, and just has V
1ρ
1+ 2V
2ρ
2=(V
1+ 2V
2) ρ
3
V
1, V
2result can be obtained by 3D software test, if impeller selects polyformaldehyde material, ρ
1be 1.36, the density p of the lower water of normal temperature 20 degree
3be 0.997, so just can calculate the density p needed for buoyance module
2.
The gravitational equilibrium method of above-mentioned a kind of heavy caliber spiral shell wing water meter can be realized by device as shown in Figure 1.Described device comprises the first annular buoyance module 1, second annular buoyancy assembly 10, first lining 2, second lining 9, two magnet steel 3, the annular corundum 8 of first annular corundum 4, second, circular arc corundum 5, impeller 6, plane corundum 7, impeller box rear portion 11 and impeller box front portion 12;
As shown in Figure 2, described impeller 6 has the two ends that central shaft 61, first annular buoyance module 1, the second annular buoyancy assembly 10 protruded at two ends is nested in central shaft respectively; Central shaft 61 has central through hole, and the first lining 2 and the second lining 9 are embedded into from the two ends of central shaft 61 in the central through hole of central shaft 61 respectively; First lining 2 and the second lining 9 all have central through hole, the first annular corundum 4 and circular arc corundum 5 embed successively be arranged on the first lining 2 central through hole in, plane corundum 7 and the second annular corundum 8 and be embedded in the central through hole of the second lining 9 successively; First lining 2 and the second lining 9 adopt above-mentioned clearance fit to install with impeller 6 axle center, play a protective role to the central shaft 61 of impeller 6.
As shown in Figure 2, impeller 6 is offered two magnet steel mounting holes, 62, two magnet steel 3 and is arranged in magnet steel mounting hole 62 respectively, two magnet steel 3 are respectively S pole magnet steel and N pole magnet steel; In order to receive water-flow signal;
Impeller box rear portion 11 and the anterior 12 composition impeller box of impeller box, for convenience of the insertion of signal lever, generally, the sidewall of impeller box has opening; Impeller 6 is arranged in impeller box, and impeller box rear portion 11 and impeller box front portion 12 all have center thimble, and the central term pin at impeller box rear portion 11 is inserted in the central through hole of the first lining (2), withstands the first annular corundum 4; The central term pin of impeller box front portion 12 is inserted in the central through hole of the second lining 9, withstands the second annular corundum 8.
Current flow to impeller box from the water inlet of impeller box front portion 12, by the rotary impact effect of impeller 6, to buoyance module play one upwards lift effect.
First annular buoyance module 1, second annular buoyancy assembly 10 is nested in the two ends of central shaft respectively, specifically can adopt following nested mode: as shown in Figure 3, described first buoyance module 1 and the second buoyance module 10 all have two the first jacks, 101, two pins 102 layout alternate with pin 102 central through hole 103, first jack 101; As shown in Figure 4, the pin that central shaft 61 surrounding of impeller 6 has four the second jack 63, first buoyance modules 1 is inserted in two the second jacks 63 respectively, and the end of pin extend in the first jack 101 of the second buoyance module 10; The pin 102 of the second buoyance module 10 is inserted in all the other two the second jacks 63 respectively, and the end of pin 102 extend in the first jack 101 of the first buoyance module 1; Be staggered installation of on impeller by two pins and jack, realize the compact siro spinning technology between impeller.
The preparation method of the first buoyance module 1 and the second buoyance module 10 is:
1. the mould of the first buoyance module 1 and the second buoyance module 10 is designed for impeller 6 as shown in Figure 4, as illustrated in Figures 5 and 6, comprise two side cylinders 14 for building the first jack 101, two for building two side circular holes 15 of pin 102, and for building the centered cylinder 13 of central through hole 103; And calculate target volume and the target density of buoyance module;
2. according to target density, by melting means more than 6g/10min PP material mix with gas-development agent certain proportion, obtain compound; Due to gas-development agent, it is the independent bead of similar balloon, his expansion is limited, too large it outer wall can limit thin, intensity limit is poor, affects stability, so we can do proportion scale according to density value, density is less, need the gas-development agent added suitably to increase, be specially: target density is 0.8 ~ 0.9g/mL, the quality of gas-development agent is 1.5% of PP quality of materials; Target density is 0.7 ~ 0.8g/mL, and the quality of gas-development agent is 3% of PP quality of materials; Target density is 0.6 ~ 0.7g/mL, and the quality of gas-development agent is 4.5% of PP quality of materials; Target density is 0.5 ~ 0.6g/mL, and the quality of gas-development agent is 6% of PP quality of materials;
3. compound step 2 obtained is injected in mould by injection machine, obtains the first buoyance module 1 and the second buoyance module 10.
Injection moulding link is also important link, first will set the temperature in each stage, in three stages, phase temperature should arrange as far as possible low, can blanking, prevent gas-development agent from foaming too early in barrel, nozzle temperature should arrange higher, is conducive to Injection Molding shaping, be specially: the temperature of first stage is 180 ~ 190 degree, the temperature of subordinate phase is 140 ~ 150 degree, and the temperature of phase III is 140 ~ 150 degree, and nozzle temperature is 200 ~ 220 degree; Injection moulding pressure is 2.8 ~ 3.0MPa.
Claims (6)
1. the gravitational equilibrium method of a heavy caliber spiral shell wing water meter, it is characterized in that, the method is on the pros and cons of impeller (6), arrange the first buoyance module (1) and the second buoyance module (10) respectively, first buoyance module (1) and the second buoyance module (10) are made up of same material, and volume is identical; Volume and the density of buoyance module meet V
1ρ
1+ 2V
2ρ
2=(V
1+ 2V
2) ρ
3; Wherein, V
1for the volume of impeller (6), ρ
1for the density of impeller (6), V
2for the volume of buoyance module, ρ
2for the density of buoyance module, ρ
3for the density of water under normal temperature (20 DEG C).
2. method according to claim 1, is characterized in that, the preparation method of described first buoyance module (1) and the second buoyance module (10) is:
(1) mould of the first buoyance module (1) and the second buoyance module (10) is designed according to impeller (6); And calculate target volume and the target density of buoyance module;
(2) according to target density, by melting means more than 6g/10min PP material mix with gas-development agent certain proportion, obtain compound; Be specially: target density is 0.8 ~ 0.9g/mL, the quality of gas-development agent is 1.5% of PP quality of materials; Target density is 0.7 ~ 0.8g/mL, and the quality of gas-development agent is 3% of PP quality of materials; Target density is 0.6 ~ 0.7g/mL, and the quality of gas-development agent is 4.5% of PP quality of materials; Target density is 0.5 ~ 0.6g/mL, and the quality of gas-development agent is 6% of PP quality of materials;
(3) compound step 2 obtained is injected in mould by injection machine, obtains the first buoyance module (1) and the second buoyance module (10).
3. method according to claim 2, is characterized in that, the temperature of described injection machine first stage is 180 ~ 190 degree, and the temperature of subordinate phase is 140 ~ 150 degree, and the temperature of phase III is 140 ~ 150 degree, and nozzle temperature is 200 ~ 220 degree; Injection moulding pressure is 2.8 ~ 3.0MPa.
4. the impeller gravity balance device of a heavy caliber spiral shell wing water meter, it is characterized in that, described device comprises the first annular buoyance module (1), the second annular buoyancy assembly (10), the first lining (2), the second lining (9), two magnet steel (3), the first annular corundum (4), the second annular corundum (8), circular arc corundum (5), impeller (6), plane corundum (7), impeller box rear portion (11) and impeller box front portion (12); Described impeller (6) has the central shaft (61) that two ends are protruded, the first annular buoyance module (1), and the second annular buoyancy assembly (10) is nested in the two ends of central shaft respectively; Central shaft (61) has central through hole, and the first lining (2) and the second lining (9) are embedded in the central through hole of central shaft (61) from the two ends of central shaft (61) respectively; First lining (2) and the second lining (9) all have central through hole, first annular corundum (4) and circular arc corundum (5) embed successively and are arranged in the central through hole of the first lining (2), plane corundum (7) and the second annular corundum (8) and be embedded in the central through hole of the second lining (9) successively; Impeller (6) has two magnet steel mounting holes (62), two magnet steel (3) are arranged in magnet steel mounting hole (62) respectively, and two magnet steel (3) are respectively S pole magnet steel and N pole magnet steel;
Impeller box rear portion (11) and impeller box front portion (12) composition impeller box, impeller (6) is arranged in impeller box, impeller box rear portion (11) and impeller box front portion (12) all have center thimble, the central term pin at impeller box rear portion (11) is inserted in the central through hole of the first lining (2), withstands the first annular corundum (4); The central term pin of impeller box front portion (12) is inserted in the central through hole of the second lining (9), withstands the second annular corundum (8).
5. the impeller gravity balance device of heavy caliber spiral shell wing water meter according to claim 4, it is characterized in that, described first buoyance module (1) and the second buoyance module (10) all have two the first jacks (101), two pins (102) and central through hole (103), the first jack (101) and pin (102) alternate layout; Central shaft (61) surrounding of impeller (6) has four the second jacks (63), the central through hole (103) of the first buoyance module (1) and the second buoyance module (10) all coordinates with central shaft (61), the pin (102) of the first buoyance module (1) is inserted in two the second jacks (63) respectively, and the end of pin extend into first jack interior (101) of the second buoyance module (10); The pin (102) of the second buoyance module (10) is inserted in all the other two second jacks (63) respectively, and the end of pin (102) extend in first jack (101) of the first buoyance module (1).
6. the impeller gravity balance device of heavy caliber spiral shell wing water meter according to claim 4, it is characterized in that, described first buoyance module (1) and the second buoyance module (10), first buoyance module (1) and the second buoyance module (10) are made up of same material, and volume is identical; Volume and the density of buoyance module meet V
1ρ
1+ 2V
2ρ
2=(V
1+ 2V
2) ρ
3; Wherein, V
1for the volume of impeller (6), ρ
1for the density of impeller (6), V
2for the volume of buoyance module, ρ
2for the density of buoyance module, ρ
3for the density of water under normal temperature (20 DEG C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510506154.2A CN105157760B (en) | 2015-08-18 | 2015-08-18 | The impeller gravity balance device and its gravitational equilibrium method of heavy caliber spiral shell wing water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510506154.2A CN105157760B (en) | 2015-08-18 | 2015-08-18 | The impeller gravity balance device and its gravitational equilibrium method of heavy caliber spiral shell wing water meter |
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| Publication Number | Publication Date |
|---|---|
| CN105157760A true CN105157760A (en) | 2015-12-16 |
| CN105157760B CN105157760B (en) | 2018-04-20 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255495A (en) * | 2017-07-06 | 2017-10-17 | 福州金泽科技有限公司 | Large diameter helical vane type water meter impeller |
| CN107314793A (en) * | 2017-06-19 | 2017-11-03 | 南京水门电子有限公司 | Detachable and combination type large-diameter water meter |
| CN107314795A (en) * | 2017-06-19 | 2017-11-03 | 南京水门电子有限公司 | Water meter measurement antihunt means |
| CN108443235A (en) * | 2018-05-24 | 2018-08-24 | 山东禹王生态食业有限公司 | The method for quickly solving bladed disk vibration |
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2015
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314793A (en) * | 2017-06-19 | 2017-11-03 | 南京水门电子有限公司 | Detachable and combination type large-diameter water meter |
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| CN108443235A (en) * | 2018-05-24 | 2018-08-24 | 山东禹王生态食业有限公司 | The method for quickly solving bladed disk vibration |
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|---|---|
| CN105157760B (en) | 2018-04-20 |
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