CN107843330B - Flow weighing measurement device - Google Patents
Flow weighing measurement device Download PDFInfo
- Publication number
- CN107843330B CN107843330B CN201711298754.XA CN201711298754A CN107843330B CN 107843330 B CN107843330 B CN 107843330B CN 201711298754 A CN201711298754 A CN 201711298754A CN 107843330 B CN107843330 B CN 107843330B
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- China
- Prior art keywords
- weighing
- pressurizing
- liquid medium
- pipe
- packaging device
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- 238000005303 weighing Methods 0.000 title claims abstract description 138
- 238000005259 measurement Methods 0.000 title claims abstract description 30
- 238000004806 packaging method and process Methods 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims description 53
- 239000007789 gas Substances 0.000 claims description 43
- 239000003380 propellant Substances 0.000 claims description 22
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
- Measuring Volume Flow (AREA)
Abstract
The object of the application is to provide a measuring device for weighing flow, which comprises a packaging device, a booster tube, a weighing device and a weighing sensor, wherein the weighing device and the weighing sensor are arranged in the packaging device; the weighing device is arranged on the weighing sensor, the weighing sensor is fixed on the inner wall of the packaging device; the first end of the pressurizing pipe is fixed at the top of the packaging device, and the second end of the pressurizing pipe is inserted into the packaging device and is arranged above the weighing device. The pressurizing pipe is used for distributing pressurizing gas into the packaging device and the weighing device. Therefore, the factors such as external constraint force which is difficult to overcome and dynamic influence force generated by pressurized gas flow and the like caused by the fact that the pressurizing pipe is directly connected with the weighing device are avoided, and the weighing device is more accurate in measurement.
Description
Technical Field
The application relates to the field of fluid mechanics, in particular to a measuring device for weighing flow.
Background
With the rapid development of the aerospace technology, the novel strategic liquid rocket attitude control engine ground heat test flow weighing measurement device is used for enabling the measurement accuracy to directly influence the thrust of a rocket engine to be on the tiny flow of a few grams per second of a propellant of the attitude control liquid rocket engine, finally influence the precise track of the rocket flying in space and the missile striking accuracy, cannot accurately reflect the inherent quality of the engine, and causes the failure of attitude adjustment or deviation from a preset flying orbit. Therefore, the development of the liquid rocket attitude control engine provides strict requirements of high, accurate and precise. At present, the existing weighing and measuring device is used for directly and mechanically connecting a propellant container pressurizing pipeline and a propellant outlet pipeline, so that factors such as external constraint force which is difficult to overcome, dynamic influence force generated by pressurized gas flowing and propellant flowing out and the like are brought, and the measuring precision is not accurate enough.
Disclosure of Invention
The utility model provides a flow weighing's measuring equipment to solve the container pressurization pipeline connection of weighing and propellant outlet piping connection, the external constraint power that is difficult to overcome of bringing, and a great deal of factors such as dynamic influence that pressurized gas flows and propellant outflow produced, cause the inaccurate problem of weighing measurement's precision.
To solve the above technical problem, according to an aspect of the present application, there is provided a measurement device for weighing a flow, the measurement device including: the device comprises a packaging device, a weighing device, a pressurizing pipe and a weighing sensor, wherein the weighing device and the weighing sensor are arranged in the packaging device; the weighing device is arranged on the weighing sensor, and the weighing sensor is fixed on the inner wall of the packaging device; the first end of the pressurizing pipe is fixed at the top of the packaging device, and the second end of the pressurizing pipe is inserted into the packaging device and is arranged above the weighing device.
Further, the pressurizing pipe is used for distributing pressurizing gas into the packaging device and the weighing device.
Further, the measuring device further includes: and a supply pipe, wherein the supply pipe is used for adding liquid medium into the weighing device and supplying the liquid medium in the weighing device to the outside of the packaging device.
Further, the first end of the supply tube is fixed to the top of the packaging device, and the second end is inserted into the weighing device.
Further, the pressurized gas dispensed by the pressurization tube is insoluble in the liquid medium within the weighing device.
Further, the pressurized gas dispensed by the pressurization tube comprises nitrogen and the liquid medium within the weighing device comprises dinitrogen tetroxide.
Further, the ratio of the volume of pressurized gas dispensed by the pressurization tube to the volume of liquid medium within the weighing device comprises 1 to 20.
Further, the measuring device includes: and the measuring output line is connected with the weighing sensor and outputs data measured by the weighing sensor.
Further, the measuring device includes: and the first control valve is fixedly connected with the first end of the pressurizing pipe and is used for controlling the pressurizing gas flowing into the pressurizing pipe.
Further, the measuring device includes: and the second control valve is fixedly connected with the first end of the supply pipe and is used for controlling the liquid medium flowing into the supply pipe and the liquid medium flowing out through the supply pipe.
Compared with the prior art, the flow weighing measuring equipment comprises a packaging device, a pressurizing pipe, a weighing device and a weighing sensor, wherein the weighing device and the weighing sensor are arranged in the packaging device; the weighing device is arranged on the weighing sensor, and the weighing sensor is fixed on the inner wall of the packaging device; the first end of the pressurizing pipe is fixed at the top of the packaging device, and the second end of the pressurizing pipe is inserted into the packaging device and is arranged above the weighing device. The pressurizing pipe is used for distributing pressurizing gas into the packaging device and the weighing device. Therefore, the factors such as external constraint force which is difficult to overcome and dynamic influence force generated by pressurized gas flow and the like caused by the fact that the pressurizing pipe is directly connected with the weighing device are avoided, and the weighing device is more accurate in measurement.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 shows a schematic diagram of a flow-weighing measuring device;
FIG. 2 shows an enlarged schematic view of the connection of the boost conduit at I in FIG. 1;
fig. 3 shows an enlarged schematic view of the bottom of the propellant supply line at II in fig. 1.
The same or similar reference numbers in the drawings refer to the same or similar parts.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
In an embodiment of the present application, there is provided a measuring apparatus for weighing a flow, the measuring apparatus including: the device comprises a packaging device 1, a booster pipe 2, a weighing device 3 and a weighing sensor 4, wherein the weighing device 3 and the weighing sensor 4 are arranged in the packaging device 1; the weighing device 3 is arranged on the weighing sensor 4, and the weighing sensor 4 is fixed on the inner wall of the packaging device 1; the first end of the pressurizing pipe 2 is fixed on the top of the packaging device 1, and the second end is inserted into the packaging device 1 and is arranged above the weighing device 3. The single space in the packaging device is changed into multiple spaces, and the packaging device does not have a weighing function any more and is separated from the weighing device independently. Wherein the pressurizing pipe 2 is used for distributing pressurizing gas into the packaging device 1 and the weighing device 3. In a specific embodiment, if the liquid medium in the weighing device 3 needs to be supplied to the outside, the gas needs to be added, the top of the weighing device 3 is not closed, and the pressurizing gas distributed by the pressurizing tube 2 is convenient to squeeze the liquid in the weighing device 3, the weighing device 3 needs to measure the liquid medium in the pressurizing tube with high precision and calculate the amount of the liquid medium supplied to the outside, and the pressurizing tube 2 is welded to the packaging device 1, so that factors such as external constraint force which is difficult to overcome when the pressurizing tube 2 is directly connected with the weighing device, dynamic influence caused by flowing of the pressurizing gas and the like are avoided, and the weighing device 3 is more accurate in measurement. In a specific embodiment of the present application, such as when the measuring device described herein is a flow weighing measuring device in a liquid rocket attitude control engine ground heat test, the weighing device measures more accurately, and then rocket thrust is calculated more accurately, so that the more accurate rocket thrust enters a preset orbit or a missile strikes a target more accurately.
Preferably, the measuring device further comprises: a supply pipe 5, wherein the supply pipe 5 is used for adding liquid medium into the weighing device 3 and supplying the liquid medium in the weighing device 3 to the outside of the packaging device 1. In an embodiment of the present application, a liquid medium is added into the weighing device 3 through the supply pipe 5, in order to supply the liquid medium in the weighing device 3 to the outside, a pressurizing gas is needed, the liquid medium is extruded into a corresponding required device outside the packaging device 1 through pressure, in the present application, the pressurizing pipe 2 distributes gas into the packaging device 1 and the weighing device 3, and a volume air cushion at the upper part of the liquid level in the weighing device 3 is filled in a balanced manner, so that the purpose of pressurizing the gas for the weighing device 3 is achieved. The restraint force when the booster pipe 2 is directly connected with the weighing device 3 is eliminated, and the accuracy of flow weighing measurement is improved. It should be noted that, for the purpose of pressurizing the gas dispensed by the tube 2 to squeeze the liquid medium in the weighing device 3, the pressurizing gas dispensed by the tube 2 is required to be insoluble in the liquid medium in the weighing device 3.
Preferably, the first end of the supply tube 5 is fixed to the top of the packaging unit 1 and the second end is inserted into the weighing unit 3. When the liquid medium is pushed into the weighing device 3, the liquid medium is pushed through the supply pipe 5, the supply pipe 5 is inserted into the weighing device 3 but is in non-contact with the bottom, the first end of the supply pipe 5 is welded and fixed with the packaging device 1, the liquid medium in the weighing device 3 is extruded by pressurized gas and is supplied to a corresponding required device or equipment through the outside of the packaging device 1, so that the factors such as external constraint force which is difficult to overcome and is brought by direct mechanical connection of the supply pipe 5 and the weighing device, dynamic influence force generated by outflow of the liquid medium and the like are avoided, the accuracy of flow weighing measurement is improved, and high-precision measurement is realized.
Further, the ratio of the volume of the pressurized gas dispensed by the pressurizing pipe 2 to the volume of the liquid medium in the weighing device 3 is comprised between 1 and 20. The ratio of the volume of gas dispensed by the pressurizing tube 2 into the packaging device (including the upper part of the liquid in the weighing device) to the volume of the liquid medium in the weighing device 3 is comprised between 1 and 20, so that enough gas can squeeze the liquid, the volume of gas is larger than 20 times of the volume of the liquid medium, the flow fluctuation of the liquid medium can be stabilized, the liquid level of the liquid medium is stable, and the data measured by the weighing device 3 can be more accurate. Moreover, the pressure of the pressurized gas on the weighing device 3 can be made uniform through a proper volume difference, and the influence of additional force is reduced during measurement, so that the measurement is more accurate.
In an embodiment of the present application, as shown in the structural schematic diagram of the flow weighing measurement device in fig. 1, the measurement device includes the above-mentioned packaging device 1, a pressurization pipe 2, a weighing device 3, a weighing sensor 4, and a supply pipe 5, and further includes a first control valve 6 and a second control valve 7, where the first control valve 6 is fixedly connected with a first end of the pressurization pipe 2 and is used for controlling pressurized gas flowing into the pressurization pipe 2, and the second control valve 7 is fixedly connected with a first end of the supply pipe 5 and is used for controlling liquid medium flowing into the supply pipe 5 and liquid medium flowing out through the supply pipe 5. Here, the first control valve 6 may be configured to supply gas to the pressurizing pipe 3, to dispense gas to the container through the pressurizing pipe 2, to discharge gas in the container, and the second control valve 7 may be configured to supply liquid medium to the weighing apparatus, or to control outflow of the liquid medium. Preferably, the measuring device comprises: and a measurement output line 8, wherein the measurement output line 8 is connected with the weighing sensor 4 and outputs data measured by the weighing sensor 4.
In a specific embodiment, the pressurized gas dispensed by the pressurization tube 2 comprises nitrogen, and the liquid medium in the weighing device 3 comprises dinitrogen tetroxide (as shown in fig. 1). The packaging device 1 is preferably an outer sleeve tank, the pressurizing pipe 2 is an air pressurizing pipeline, the weighing device 3 is a weighing container, the weighing sensor 4 is an electronic weighing sensor, the supply pipe 5 is a propellant liquid pipeline output pipe, the first control valve 6 is a pipeline and pressurizing control valve, and the second control valve 7 is a propellant inlet and outlet control valve. When the liquid medium in the weighing container 3 is dinitrogen tetroxide, the liquid medium can be used as a propellant of an engine, and the measuring device can be used for rocket attitude control engineOn the one hand, the high-precision flow weighing measurement of the surface heat test is carried out, on the other hand, the gas pressurization design is carried out, if propellant fuel in the weighing container 3 is supplied to an engine, pressurized gas is needed, and the purpose of supplying the propellant to the engine for burning the ground test is achieved by extruding the propellant through a pipeline and other pressure elements, the gas distributor pipe of the pressurizing pipeline 2 is needed to be welded to the outer sleeve tank 1, the pressurizing valve 6 is opened, and the gas enters the outer sleeve tank 1, at the moment, the volume air cushion at the upper part of the liquid level in the weighing container 3 is filled in a balanced manner, the purpose of pressurizing the gas for the weighing container 3 is achieved, and the constraint force of the connection of the pressurizing pipeline and the weighing container is eliminated. Fig. 2 shows an enlarged schematic view of the connection of the pressurizing pipe at I in fig. 1, and it can be seen that one end of the pressurizing pipe is welded to the outer jacket tank, and the other end distributes gas, so as to uniformly distribute pressurizing gas N into the outer jacket tank 1 2 For the liquid N in the weighing device 3 in the jacket tank 1 2 O 4 And extruding. On the other hand, the propellant supply design is performed, the propellant supply tube 5 is inserted into the weighing container 3 but is at a distance from the bottom, as shown in fig. 3, an enlarged schematic view of the bottom of the propellant supply tube at the point II in fig. 1 is provided, wherein the distance from the bottom of the propellant supply tube 5 to the weighing container 3 can be 10mm, so that the propellant in the weighing container 3 can reach the engine through the supply tube 5 under the extrusion of the pressurized gas, and of course, small holes can be formed on the wall of the tube near the bottom of the supply tube 5, so as to avoid the influence of vortex formed at the bottom of the tube on weighing measurement; the upper joint of the supply pipeline 5 is welded and fixed with the outer sleeve tank 1, and the propellant in the weighing container 3 is extruded under the pressure of the pressurized air, and the purpose of supplying the propellant for the test run of the engine is achieved through the pressure elements such as the pipeline and the like. Therefore, when the weighing container 3 is not connected with any pipeline, the factors such as constraint force, dynamic influence force generated by pressurized gas flowing and propellant flowing out can be overcome, the weighing container 3 is connected with the weighing sensor 4, and a measuring signal is transmitted to a computer data acquisition and processing system through a cable wire, so that the purpose of measuring flow is achieved. By the measuring equipment, the measuring precision can be improved, and the thrust of the rocket engine is directly influenced due to the measuring precision, so that the accurate track of the rocket flying in space and the missile striking precision are finally improvedThe degree accurately reflects the inherent quality of the engine, and accurately adjusts the pose or performs the preset flight orbit.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No figure in the claims should be taken the labels are to be construed as limiting the claims concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units or means recited in the apparatus claims can also be implemented by means of one unit or means in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Claims (7)
1. A measuring device for flow weighing of a propellant, characterized in that the measuring device comprises: the packaging device, the weighing device, the pressurizing pipe, the supply pipe and the weighing sensor, wherein,
the weighing device and the weighing sensor are arranged in the packaging device;
the weighing device is an upwards-opened device with a top not closed and is arranged on the weighing sensor, and the weighing sensor is fixed on the inner wall of the packaging device;
the first end of the pressurizing pipe is fixed at the top of the packaging device, the second end of the pressurizing pipe is inserted into the packaging device and is arranged above the weighing device, the pressurizing pipe is used for distributing pressurizing gas into the packaging device and the weighing device, and the pressurizing gas distributed by the pressurizing pipe is insoluble in a liquid medium in the weighing device;
the first end of the supply tube is fixed at the top of the encapsulation means, and the second end is inserted into the weighing means but at a distance from the bottom, through which supply tube the liquid medium is pushed into the weighing means.
2. The measurement apparatus of claim 1, wherein the supply tube is for adding a liquid medium into the weighing device and supplying the liquid medium in the weighing device to the outside of the packaging device.
3. The measurement apparatus of claim 1 wherein the pressurized gas dispensed by the pressurization tube comprises nitrogen and the liquid medium within the weighing device comprises dinitrogen tetroxide.
4. The measurement apparatus of claim 1 wherein the ratio of the volume of pressurized gas dispensed by the pressurization tube to the volume of liquid medium within the weighing device comprises 1 to 20.
5. The measurement device of claim 1, wherein the measurement device comprises: the output line is measured and the output line is,
the measuring output line is connected with the weighing sensor and outputs data measured by the weighing sensor.
6. The measurement device of claim 1, wherein the measurement device comprises: the first control valve is provided with a first control valve,
the first control valve is fixedly connected with the first end of the pressurizing pipe and used for controlling pressurizing gas flowing into the pressurizing pipe.
7. The measurement device of claim 1, wherein the measurement device comprises:
a second control valve is provided for controlling the flow of air through the second valve,
the second control valve is fixedly connected with the first end of the supply pipe and is used for controlling the liquid medium flowing into the supply pipe and the liquid medium flowing out of the supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298754.XA CN107843330B (en) | 2017-12-08 | 2017-12-08 | Flow weighing measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298754.XA CN107843330B (en) | 2017-12-08 | 2017-12-08 | Flow weighing measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107843330A CN107843330A (en) | 2018-03-27 |
| CN107843330B true CN107843330B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711298754.XA Active CN107843330B (en) | 2017-12-08 | 2017-12-08 | Flow weighing measurement device |
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| CN (1) | CN107843330B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109443781B (en) * | 2018-09-19 | 2020-07-28 | 上海空间推进研究所 | Self-feedback fault recognition engine pulse working condition flow measuring device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658750A2 (en) * | 1993-12-14 | 1995-06-21 | Hydrometer GmbH | Method and device for proving volume flowmeters |
| US5475610A (en) * | 1990-11-29 | 1995-12-12 | The Perkin-Elmer Corporation | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control |
| EP0906872A1 (en) * | 1994-01-04 | 1999-04-07 | Adolf Würth GmbH & Co. KG | Method and device for filling a dispensing container |
| CN103278330A (en) * | 2013-04-24 | 2013-09-04 | 北京航天试验技术研究所 | Propellant flow comparison and measurement system for attitude and orbit control engine testing platform |
| CN103547894A (en) * | 2011-04-18 | 2014-01-29 | 塞莱斯技术公司 | Liquid mass measurement and fluid transmitting apparatus |
| CN207688999U (en) * | 2017-12-08 | 2018-08-03 | 上海悟道机电设备有限公司 | A kind of measuring apparatus that flow is weighed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH702769B1 (en) * | 2010-02-22 | 2019-07-31 | Reseachem Gmbh | Metering device and method for metering a fluid into a reaction vessel. |
-
2017
- 2017-12-08 CN CN201711298754.XA patent/CN107843330B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5475610A (en) * | 1990-11-29 | 1995-12-12 | The Perkin-Elmer Corporation | Thermal cycler for automatic performance of the polymerase chain reaction with close temperature control |
| EP0658750A2 (en) * | 1993-12-14 | 1995-06-21 | Hydrometer GmbH | Method and device for proving volume flowmeters |
| EP0906872A1 (en) * | 1994-01-04 | 1999-04-07 | Adolf Würth GmbH & Co. KG | Method and device for filling a dispensing container |
| CN103547894A (en) * | 2011-04-18 | 2014-01-29 | 塞莱斯技术公司 | Liquid mass measurement and fluid transmitting apparatus |
| CN103278330A (en) * | 2013-04-24 | 2013-09-04 | 北京航天试验技术研究所 | Propellant flow comparison and measurement system for attitude and orbit control engine testing platform |
| CN207688999U (en) * | 2017-12-08 | 2018-08-03 | 上海悟道机电设备有限公司 | A kind of measuring apparatus that flow is weighed |
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| CN107843330A (en) | 2018-03-27 |
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