CN104897251A - First-class standard metal measure - Google Patents
First-class standard metal measure Download PDFInfo
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- CN104897251A CN104897251A CN201510371835.2A CN201510371835A CN104897251A CN 104897251 A CN104897251 A CN 104897251A CN 201510371835 A CN201510371835 A CN 201510371835A CN 104897251 A CN104897251 A CN 104897251A
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Abstract
The invention discloses a first-class standard metal measure. The body part comprises an upper measure and a lower measure which are connected. The top end of the upper measure is connected with an overflow device, the overflow device comprises a shell provided with an exhaust device and an overflow pipe, an upper opening of the overflow pipe is arranged in the shell and is not lower than a water outlet in the top end of the upper measure, and a lower opening of the overflow pipe is arranged outside the shell. The overflow pipe is provided with a bend, the bend is lower than the water outlet at the top end of the upper measure, and the end is provided with an overflow hole. By the overflow device, error caused by manual observation of neck liquid-level scale is avoided, measuring accuracy is improved, and the first-class standard metal measure is easier to process and transport and convenient to demount and clean the measure. Measuring accuracy and repeatability are improved, and annular rigid seal is easier to guarantee sealing performance. By an inlet three-way valve, error caused by opening and closing the valve is avoided; by a platinum resistor temperature measuring device, the first-class standard metal measure has the advantages of high accuracy, short response time and the like.
Description
Technical field
The present invention relates to a kind of First class standard metal tank, particularly relate to the first-class metal tank of a kind of main cylinder separate type.
Background technology
Standard capacity measure is the standard metrology appliance for measuring liquid volume, can be used as the measurement instrument of capacity transmission of quantity value.It is widely used in flow metering calibrating, calibrating installation, is that flowmeter carries out one of visual plant of performance test in manufacture, scientific research.
First class standard metal tank is a kind of standard metrology appliance for metering liquid, being a kind of STANDARD MEASURING APPARATUS FOR that must be equipped with when measuring high precision volume, for the error of periodic verification positive displacement standard, guaranteeing the accuracy of positive displacement standard.The fluid level scale value of nominal capacity corresponds to nominal capacity value when 20 DEG C.The fluid level scale of nominal capacity is generally positioned in the middle part of metering neck.
Standard capacity measure primary structure domestic at present as shown in Figure 1, its main part comprises interconnective upper cone 4, cylindrical shell 5 and lower cone 7, upper cone upper end is connected with metering neck 1, liquid level tube 2, liquid level tube is provided with metering neck scale 3, upper cone 4 conical surface is provided with thermometer; Lower cone 7 lower end is connected with self-control T-valve 8, lower cone 7 is provided with support 6.The principle of work of this metal tank is: fluid enters in measuring device from T-valve 8 below, when fluid level rises near metering neck scale mark, close T-valve 8 entrance, regulate the fine tuning valve on metering neck, liquid level is overlapped with the groove of complementary scale on glass tube.Be standard value from the volumetric values metering neck liquid level to T-valve 8.This metal tank is the registration by people's visual inspection liquid level and scale mark, due to the difference of viewing angle, there is the artificial collimation error, and measuring accuracy can be caused not high.In addition, also there is following shortcoming in existing first-class metal tank: 1, liquid level tube uses for a long time and there will be dirty, and the cleaning of this very elongated liquid level tube is very inconvenient, can only change, add measuring device cost after even dirty; 2, the plumbing valve below lower cone is a kind of homemade T-valve, there is the drawbacks such as precision is low, the on-off effect time is grown, fit badly; 3, adopt mercury thermometer reading, it can be subject to the impact of environment temperature and human factor and then cause error, and precision is not high; 4, integral solder structure can cause inevitable permanent deformation adding man-hour, occurs the wall cling phenomenon after measuring device draining, and then affects repeatability and the precision of measuring device; 5, the conventional stainless steel of material selection, if this stainless steel is placed in an atmosphere for a long time, the acidic materials generation oxidative phenomena easily and in air.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of First class standard metal tank, to improve measuring accuracy and accuracy.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of First class standard metal tank, its main part is interconnected by measuring device top and measuring device bottom and forms, the top on described measuring device top is connected with overflow mechanism, described overflow mechanism comprises the housing that is provided with exhaust apparatus and run-down pipe, the upper shed of described run-down pipe to be arranged in housing and to be not less than the water delivering orifice of measuring device upper end, and the under shed of run-down pipe is arranged on outside housing; Run-down pipe is also provided with a bending, and the position of described bending lower than the water delivering orifice of measuring device upper end, and is provided with spout hole at bending part.
Exhaust apparatus adopts gas outlet.
The water delivering orifice of measuring device upper end is set to chamfering groove.
Described measuring device top and measuring device bottom connect as one.
Described measuring device top comprises interconnective upper cone and upper shell, and measuring device bottom comprises interconnective lower shell and lower cone; The top of described upper cone is connected with overflow mechanism; The lower end of upper shell is provided with upper flange plate, and the upper end of lower shell is provided with lower flange, for removably connecting between upper flange plate and lower flange.
Be detachably connected as: be bolted connection between upper flange plate and lower flange.
Upper flange plate and lower flange adopt raised-face flange, and the surface of contact between upper flange plate and lower flange adopts the mode of the hard sealing of raised-face flange annular to seal.
Upper cone is also provided with platinum resistance temp. measuring device.
The lower end of lower cone is connected with delivery pipe, and delivery pipe is provided with T-valve.
Lower shell is connected with support, and support is connected with the lower flange of lower shell upper end; The lower end of support is also provided with leveling serew; Be provided with stiffening plate between whole support and leveling serew, measuring device support is connected as a single entity by stiffening plate.
Beneficial effect of the present invention: 1, without the need to relying on the artificial liquid level that reads to carry out value, but take overflow mechanism, place, measuring device upper cone top liquid level is to be orthobaric volume value down to the fluid volume of T-valve spool, avoid the error that artificial observation metering neck liquid level scale causes, improve measuring accuracy; 2, measuring device upper and lower is detachable structure, namely the structure of main cylinder separate type (upper shell is separated with lower shell) is adopted, raised-face flange connected mode is adopted between upper shell, lower shell, and adopt the mode that removably connects between flange, be easier to processing transport, be convenient to dismounting measuring device and carry out cleaning; 3, the surface of contact between upper flange plate and lower flange adopts the hard sealing means of raised-face flange annular, encapsulant is not set between the two, can not because of encapsulant aging, distortion and affect orthobaric volume value, improve measuring accuracy and repeatability, the hard sealing of annular more easily ensures sealing property, guarantee zero leakage between upper and lower ring flange, and there will not be the large-area absorption of sealing surface and cause the problem of separation difficulty; 4, adopt import T-valve, easy switching, and each volume closed in valve valve is consistent, each controlled valve time is very short, avoids the error because controlled valve causes; 5, the platinum resistance temp. measuring device adopted, has the advantages such as precision is high, the response time is short.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing First class standard metal tank.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the structural representation of overflow mechanism of the present invention.
Fig. 4 is the structural representation of T-valve of the present invention.
Fig. 5 is the schematic diagram of platinum resistance temp. measuring device of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The invention provides a kind of First class standard metal tank, its main part is interconnected by measuring device top 13 and measuring device bottom 14 and forms, measuring device top 13 comprises interconnective upper cone 131 and upper cylinder 132, and measuring device bottom 14 comprises interconnective lower cylinder 141 and lower cone 142; The top on measuring device top 13 and the top of upper cone 131 are connected with overflow mechanism 9, and the water delivering orifice on the top on measuring device top 13 is positioned at overflow mechanism 9.Upper cone 131 is provided with platinum resistance temp. measuring device 12(and adopts existing high-precision platinum resistance thermometer sensor, thermometry, there is precision high, the advantages such as the response time is short), lower cylinder 141 is connected with support 15, the lower end of support 15 is provided with leveling serew 17, the lower end of lower cone 142 is connected with delivery pipe, delivery pipe is provided with import T-valve 16.
Overflow mechanism 9 comprises the housing that is provided with exhaust apparatus and run-down pipe 10.Exhaust apparatus adopts gas outlet 11, for discharging the air in overflow mechanism housing; Run-down pipe 10 comprises upper shed, spout hole and under shed.The upper shed of run-down pipe 10 is set to level, and in housing, be not less than the water delivering orifice on top, measuring device top 13 (i.e. the top of upper cone 131), under shed is arranged on outside housing.Whole run-down pipe is also provided with a bending, the position of bending is lower than the water delivering orifice of measuring device upper end, and as far as possible near overflow mechanism bottom surface, the angle of bending is at least 90 degree, and bending part is provided with spout hole, the fluid in overflow mechanism 9 can be made like this to discharge as far as possible.The water outlet on top, measuring device top 13 is set to chamfering groove, to eliminate the surface tension of water, ensures that water outlet liquid level is plane.Spout hole in overflow mechanism 9 on run-down pipe 10, its size is relevant with drain age velocity, and it can control the speed of fluid expulsion, prevents liquid from discharging too fast, makes the water outlet liquid level on top, measuring device top 13 be plane, ensures measuring accuracy.Fluid enters in measuring device from T-valve 16, and after fluid level rises to the upper shed position of run-down pipe 10 in overflowing hood, fluid enters the upper shed of run-down pipe 10, flows out to overflowing hood along run-down pipe 10 from its under shed; When the complete submergence run-down pipe 10 of liquid level, now close T-valve 16, flow away from the spout hole run-down pipe 10 with allowing fluid automatic slowly, thus on the water delivering orifice on top, measuring device top 13, staying next smooth liquid level, the fluid volume (namely water delivering orifice liquid level is with the fluid volume in measuring device between T-valve spool) now in overflow mechanism 9 below water delivering orifice (i.e. the water delivering orifice on top, measuring device top 13) liquid level is orthobaric volume value.Therefore, avoid the error that existing metal tank is caused by artificial observation metering neck scale, improve measuring accuracy, and repeatability and repdocutbility high.
Measuring device top 13 and measuring device bottom 14 are designed to main cylinder separate type, that is: the lower end of upper shell 132 is provided with upper flange plate, and the upper end of lower shell 141 is provided with lower flange, during assembling, are fastened by bolts sealing between upper flange plate and lower flange.Then can be contained in special transport case after dismounting is decomposed, take up room little, not being afraid of jolts collides with, and removes the trouble of a large mind of user from.Be disassembling cleaning after each, avoid and shelter evil people and countenance evil practices.Main cylinder separate type, avoids because welding the series of problems such as the such as distortion that causes and weld seam dead angle, thus ensure that precision, not only be easy to processing, and measuring device inwall and outside surface carry out polishing, rigorous to each details, to reduce the wall built-up amount after draining.
In order to improve measuring accuracy further, can not because of encapsulant aging, distortion and affect value, upper flange plate and lower flange are raised-face flange, and the sealing contact surface of upper flange plate and lower flange adopts the design of the hard sealing of convex surface annular, does not establish encapsulant between the two.Hard sealing means refers to and contacts with each other and the gap of eliminating by contacting with each other between the two, realizes sealing.This ring seal form is easy to processing, easily ensures sealing property, guarantees the zero leakage between upper/lower cone flange.In addition, this version is easier to dismounting, carry out measuring device cleaning, there will not be the large-area absorption of sealing surface and cause the problem of separation difficulty, and can ensure that each folding measuring device all can not affect its sealing property, avoid soft seal and compress and inconsistently cause the different problem of each volumetric values.
In order to improve the stability of strength of joint and Whole Equipment, support 15 is connected with the lower flange of lower shell 141 upper end.Be provided with stiffening plate between whole support 15 and leveling serew 17, stiffening plate adopts and processes with the corrosion resistant plate of the equal material of measuring device, and is connected as a single entity by measuring device support, enhances the steadiness of measuring device.
In order to realize easy switching, valve adopts high precision admission valve, ensures can close tight at every turn, and each volume closed in valve valve is consistent, and each controlled valve time is very short, avoids the error because controlled valve causes.
Measuring device of the present invention adopts and is commonly used in chemical field, has 316 stainless steels of extremely strong chemical property, greatly ensure that the serviceable life of measuring device.
Claims (10)
1. a First class standard metal tank, its main part is interconnected by measuring device top and measuring device bottom and forms, it is characterized in that: the top on described measuring device top is connected with overflow mechanism, described overflow mechanism comprises the housing that is provided with exhaust apparatus and run-down pipe, the upper shed of described run-down pipe to be arranged in housing and to be not less than the water delivering orifice of measuring device upper end, and the under shed of run-down pipe is arranged on outside housing; Run-down pipe is also provided with a bending, and the position of described bending lower than the water delivering orifice of measuring device upper end, and is provided with spout hole at bending part.
2. First class standard metal tank according to claim 1, is characterized in that: exhaust apparatus adopts gas outlet.
3. First class standard metal tank according to claim 1, is characterized in that: the water delivering orifice of measuring device upper end is set to chamfering groove.
4. First class standard metal tank according to claim 1, is characterized in that: described measuring device top and measuring device bottom connect as one.
5. First class standard metal tank according to claim 1, is characterized in that: described measuring device top comprises interconnective upper cone and upper shell, and measuring device bottom comprises interconnective lower shell and lower cone; The top of described upper cone is connected with overflow mechanism; The lower end of upper shell is provided with upper flange plate, and the upper end of lower shell is provided with lower flange, for removably connecting between upper flange plate and lower flange.
6. First class standard metal tank according to claim 5, is characterized in that: be detachably connected as: be bolted connection between upper flange plate and lower flange.
7. First class standard metal tank according to claim 5, is characterized in that: upper flange plate and lower flange adopt raised-face flange, and the surface of contact between upper flange plate and lower flange adopts the mode of the hard sealing of raised-face flange annular to seal.
8. First class standard metal tank according to claim 5, is characterized in that: upper cone is also provided with platinum resistance temp. measuring device.
9. First class standard metal tank according to claim 5, is characterized in that: the lower end of lower cone is connected with delivery pipe, and delivery pipe is provided with T-valve.
10. First class standard metal tank according to claim 5, is characterized in that: lower shell is connected with support, and support is connected with the lower flange of lower shell upper end; The lower end of support is also provided with leveling serew; Be provided with stiffening plate between whole support and leveling serew, measuring device support is connected as a single entity by stiffening plate.
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| CN201510371835.2A CN104897251B (en) | 2015-06-30 | 2015-06-30 | A kind of First class standard metal tank |
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| CN201510371835.2A CN104897251B (en) | 2015-06-30 | 2015-06-30 | A kind of First class standard metal tank |
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| CN104897251B CN104897251B (en) | 2018-02-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053162A (en) * | 2016-05-02 | 2016-10-26 | 张洪美 | A solution preparing and measuring device facilitating detection |
| CN108680225A (en) * | 2018-08-07 | 2018-10-19 | 山东益源环保科技有限公司 | Overflow Measuring glass |
| CN111272251A (en) * | 2020-04-03 | 2020-06-12 | 开封仪表有限公司 | First-class standard metal measuring device convenient to use |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111272251A (en) * | 2020-04-03 | 2020-06-12 | 开封仪表有限公司 | First-class standard metal measuring device convenient to use |
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| Publication number | Publication date |
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| CN104897251B (en) | 2018-02-13 |
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Inventor after: Wang Jintao Inventor after: Wu Zhijun Inventor after: Miao Yuhong Inventor after: Li Yongjie Inventor after: Chen Fuqiang Inventor after: Wu Weijun Inventor after: Feng Tianxi Inventor after: Ma Chunge Inventor after: Ren Ying Inventor after: Fan Pei Inventor after: Ren Xu Inventor after: Lin Fucheng Inventor after: Yan Bo Inventor after: Wang Gaofu Inventor after: Bao Yulong Inventor after: Zhao Yanling Inventor after: Gong Fuchen Inventor after: Liu Ziyong Inventor after: Jin Wenzhe Inventor after: Yu Shengqiang Inventor after: Hai Ning Inventor after: Zhang Huiyong Inventor before: Wang Jintao Inventor before: Zhang Yun Inventor before: Lin Fucheng Inventor before: Zhao Yanling Inventor before: Gong Fuchen Inventor before: Miao Yuhong Inventor before: Liu Ziyong Inventor before: Hai Ning Inventor before: Wu Zhijun Inventor before: Wang Shuhuai |
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