CN104020077A - A rheometer - Google Patents
A rheometer Download PDFInfo
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- CN104020077A CN104020077A CN201410241201.0A CN201410241201A CN104020077A CN 104020077 A CN104020077 A CN 104020077A CN 201410241201 A CN201410241201 A CN 201410241201A CN 104020077 A CN104020077 A CN 104020077A
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- concrete
- cylinder barrel
- flow graph
- oil
- cylinder
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- 239000004567 concrete Substances 0.000 claims abstract description 78
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000001737 promoting effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
A rheometer is provided. The rheometer comprises a cylinder barrel, two concrete pistons disposed in the cylinder barrel, a pressurization device and a driving device. The pressurization device is used for driving at least one of the concrete pistons to pressurize concrete in the cylinder barrel. The driving device is used for pushing the cylinder barrel to move relative to the concrete pistons. The rheometer also comprises a pressure detection device. The pressure detection device is used for detecting the pressure of the concrete in the cylinder barrel. The rheometer also comprises a speed detection device. The speed detection device is used for detecting the moving speed of the cylinder barrel relative to the concrete pistons. According to the rheometer of the structure, the cylinder barrel is used for containing the concrete, the pressurization device pushes one of the concrete pistons to pressurize the concrete, or the pressurization device stays still and the driving device pushes the cylinder barrel to move. The pressure of the concrete and the moving speed of the cylinder barrel are detected during the process. The rheological behavior of the material can be measured after repeated experiments. The rheometer can be suitable for a high-pressure environment and can be used for detecting materials under different pressures.
Description
Technical field
The present invention relates to material rheological characteristics field, particularly a kind of flow graph.
Background technology
Along with deepening constantly of China's economic development, infrastructure construction enters the high-speed developing period, the rheological characteristics of material, also becomes a popular research direction as concrete pumping technology thereupon.
According to existing industry standard, in < < Concrete Pumping Construction technical regulation > >, about concrete pumping resistance, conventionally adopt following experimental formula:
Wherein, Δ P is that unit length is that inner diameter of delivery tube, k1 are that adhesion factor, k2 are velocity coefficients along stroke pressure loss, D, t2/t1 is distribution valve switching time and the piston ratio of pushing concrete time, and v is concrete mean flow rate, and α is concrete radial pressure and the ratio of axle pressure.
Δ P is larger, illustrates that frictional resistance is larger, concrete can pumping poorer, pumping construction difficulty is larger.Practice shows, during Δ P≤0.015MPa.m, concrete can pumping better.
Above-mentioned concrete pressure consumption figures, much smaller than measured value, has not been suitable for the pumping of Super High high-grade concrete.
In addition, the test units such as existing flow graph only can be studied the concrete pumping resistance under normal pressure, cannot assess the pumping resistance of concrete in the high-rise pumping of reality.
Therefore, for studying the rheological characteristics of various high-grade concretes under specified pressure, for instructing the optimize and improve of concrete proportioning, how to study a kind of flow graph that is applicable to hyperbaric environment and can be used for measuring the concrete rheological characteristics under different pressures, become those skilled in the art to need the technical matters of solution badly.
Summary of the invention
In view of this, the problem to be solved in the present invention is how a kind of flow graph that is applicable to hyperbaric environment and can be used for measuring the concrete rheological characteristics under different pressures is provided.
For addressing the above problem, the present invention proposes a kind of flow graph, comprise cylinder barrel, be arranged at two concrete pistons, pressue device in described cylinder barrel, drive unit; Described pressue device is for driving at least one concrete piston to pressurize to the concrete of cylinder barrel; Described drive unit is used for promoting described cylinder barrel and moves with respect to concrete piston; Described flow graph also comprises pressure-detecting device, and described pressure-detecting device is for detection of the concrete pressure in described cylinder barrel; Described flow graph also comprises speed detector, and described speed detector is the movement velocity with respect to concrete piston for detection of described cylinder barrel.
As the improvement on the one hand of a kind of flow graph of the present invention, described pressue device is the first oil cylinder, and the cylinder tube of described the first oil cylinder or piston rod are fixedly connected with one end of described concrete piston.
As the improvement on the one hand of a kind of flow graph of the present invention, described drive unit is the second oil cylinder, and one end of described the second oil cylinder is fixedly installed on described cylinder barrel.
As the improvement on the one hand of a kind of flow graph of the present invention, on described cylinder barrel, be fixedly installed web member, the quantity of described the second oil cylinder is two, and two described the second oil cylinders are parallel to described cylinder barrel setting, and one end of two described the second oil cylinders is fixedly connected with described web member respectively.
As the improvement on the one hand of a kind of flow graph of the present invention, described flow graph comprises frame, and the other end of the second oil cylinder and described the first oil cylinder are arranged at respectively in described frame.
As the improvement on the one hand of a kind of flow graph of the present invention, described flow graph also comprises control system, and described control system is used for controlling pressue device and drive unit action.
As the improvement on the one hand of a kind of flow graph of the present invention, described pressure-detecting device is pressure transducer, and/or described speed detector is displacement transducer.
As the improvement on the one hand of a kind of flow graph of the present invention, described flow graph also comprises oil pump, and described oil pump is used for driving described the first oil cylinder and the second oil cylinder.
As the improvement on the one hand of a kind of flow graph of the present invention, on the oil-feed of described the second oil cylinder or return line, be also provided with flow speed control valve.
The flow graph of said structure, comprise cylinder barrel, be arranged at two concrete pistons, pressue device and drive units in cylinder barrel, pressue device is for driving at least one concrete piston to pressurize to the concrete of cylinder barrel, and drive unit moves relative to concrete piston for promoting cylinder barrel; Flow graph also comprises the pressure-detecting device for detection of the concrete pressure in cylinder barrel, and for detection of described cylinder barrel the speed detector with respect to the movement velocity of concrete piston.The flow graph of this structure, cylinder barrel is used for holding concrete, pressue device promotes a concrete piston concrete is pressurizeed, or pressue device is motionless, by drive unit, promotes cylinder barrel and move, in this process, by pressure-detecting device, detect concrete pressure, Negotiation speed pick-up unit detects the movement velocity of cylinder barrel, after revision test, measures the rheological characteristics of material.The flow graph of said structure, compares with traditional flow graph, applicable to hyperbaric environment, and can be used for measuring the concrete materials under different pressures.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of a kind of flow graph of the present invention;
Fig. 2 is cylinder barrel and the schematic diagram that coordinates of concrete piston;
Fig. 3 is the hydraulic system principle figure of a kind of flow graph of the present invention.
In Fig. 1 to Fig. 3, the corresponding relation of Reference numeral is:
1 first oil cylinder 2 cylinder barrel 3 second oil cylinders
4 frame 5 motor 6 control system
7 oil pump 8 flow speed control valve 9 first solenoid valves
10 second solenoid valve 11 first surplus valve 12 retaining valves
13 second surplus valve 14 fuel tanks
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Flow graph as shown in Figure 1, for the rheological characteristics of testing material, comprise cylinder barrel 2, be arranged at two concrete pistons, pressue device, drive unit in cylinder barrel 2, wherein, in cylinder barrel 2, concrete is housed, pressue device is for driving one of two concrete pistons to pressurize to the concrete in cylinder barrel 2, and drive unit is used for promoting cylinder barrel 2 and moves with respect to concrete piston; In addition, flow graph also comprises pressure detection pick-up unit and speed detector, and pressure-detecting device is for detection of the concrete pressure in cylinder barrel 2, and speed detector is the movement velocity with respect to concrete piston for detection of cylinder barrel 2.
Technique scheme, in a kind of example, as shown in Figure 2, pressue device is that the first oil cylinder 1, the first oil cylinder 1 comprises cylinder tube and piston rod, and cylinder tube or piston rod are fixedly connected with one end of concrete piston, when the first oil cylinder 1 action, can promote concrete piston and move, realize concrete pressurization.
Further, drive unit is the second oil cylinder 3, the second oil cylinder 3 moves with respect to concrete piston and moves for promoting cylinder barrel 2, particularly, the second oil cylinder 3 comprises piston rod, and in one embodiment, piston rod is fixedly installed on cylinder barrel 2, when piston rod stretches out or bounces back from the second oil cylinder 3, can be with moveable cylinder 2 to move up and down.
For guaranteeing the comparatively movement of balance of cylinder barrel 2, in another kind of embodiment, the quantity of the second oil cylinder 3 is preferably two, two the second oil cylinders 3 can be parallel to cylinder barrel 2 and arrange, cylinder barrel is provided with web member, and the upper end of two the second oil cylinders 3 is fixedly connected with web member, and web member is fixedly connected with cylinder barrel 2.When two the second oil cylinder movements, can be with moveable cylinder 2 to move up and down.
In technique scheme, flow graph also comprises that the lower end of frame 4, the second oil cylinders 3 is fixedly installed in frame 4.In addition,, when the piston rod of the first oil cylinder 1 is fixedly connected with concrete piston, the cylinder tube of the first oil cylinder 1 is fixedly connected with frame 4; And when the cylinder tube of the first oil cylinder 1 is fixedly connected with concrete piston, the piston rod of the first oil cylinder 1 is fixedly connected with frame 4.
Further, pressure-detecting device is pressure transducer, and speed detector is displacement transducer, measure for convenience concrete pressure, pressure transducer can be arranged in cylinder barrel 2, and for measuring cylinder barrel 2 with respect to the displacement transducer of concrete piston traveling speed, can be arranged on cylinder barrel 2.In addition, flow graph also comprises propulsion system and control system 6, propulsion system are used for driving the first oil cylinder 1 and the second oil cylinder 3, and control system 6 is electrically connected to speed detector and pressure-detecting device respectively, and can control pressure in cylinder barrel 2 and the translational speed of cylinder barrel 2.
In technique scheme, propulsion system comprise oil pump 7 and motor 5, oil pump 7 is used to the first oil cylinder 1 and the second oil cylinder 3 that pressure oil is provided, oil pump 7 is connected with motor 5, during motor 5 energising rotation, drive oil pump 7 rotations, the oil inlet end of oil pump 7 is arranged in fuel tank 14, and the oil outlet end of oil pump 7 is communicated with the first oil cylinder 1 and the second oil cylinder 3 by pipeline.
It should be noted that, for pressure transducer and displacement transducer, in one embodiment, sensor is electrically connected to control system 6, and the displacement data that sensor obtains passes through connection line real-time Transmission to control system 6.In another kind of embodiment, in sensor and/or control system 6, can signalization receive and emitter, the displacement data that sensor obtains receives by signal and emitter transfers to control system 6 in time.Control system 6 comprises the display screen that can show in time correlation parameter, by display screen, can read in real time, set related data.
Fig. 3 is the hydraulic system principle figure of flow graph, in hydraulic system, also be provided with flow speed control valve 8, the first surplus valve 11 and the second surplus valve 13, and first solenoid valve 9 and the second solenoid valve 10, particularly, the first solenoid valve 9 and the first surplus valve 11 are arranged on the pipeline between oil pump 7 and the first oil cylinder 1, and the first solenoid valve 9 is for controlling the oil circuit of the first oil cylinder 1; The second solenoid valve 10 and the second surplus valve 13 are arranged on the pipeline between oil pump 7 and the second oil cylinder 3, and the second solenoid valve 10 is for controlling the oil circuit of the second oil cylinder 3.
For convenience of the concrete materials under high pressure is tested, the oil pressure relief of the first surplus valve 11 can be set as 35MPa, and the oil pressure relief of the second surplus valve 13 can be set to 16MPa.
In technique scheme, the first solenoid valve 9 and the second solenoid valve 10 are two four-way electromagnetic reversing valves, when work in the left position of the first solenoid valve 9, and the rod chamber oil-feed of the first oil cylinder 1, rodless cavity is fuel-displaced.Correspondingly, when work in the right position of the first solenoid valve 9, the rodless cavity oil-feed of the first oil cylinder 1, rod chamber is fuel-displaced.When work in the left position of the second solenoid valve 10, the rod chamber oil-feed of the second oil cylinder 3, rodless cavity is fuel-displaced, correspondingly, and when work in the right position of the second solenoid valve 10, the rodless cavity oil-feed of the second oil cylinder 3, rod chamber is fuel-displaced.
For controlling the movement velocity of the second oil cylinder 3, on pipeline between the rodless cavity of the second oil cylinder 3 and oil pump 7, be also provided with for regulating the flow speed control valve 8 of pipeline fluid flow, by regulating this flow speed control valve 8, can regulate the fluid flow that enters the second oil cylinder 3 rodless cavities, and then regulate the movement velocity of cylinder barrel 2.In addition, in order to give the concrete pressurize in cylinder barrel 2, between the rod chamber of the first oil cylinder 1 and cylinder barrel 2, be also provided with retaining valve 12, under the effect of retaining valve 12, fluid can flow into cylinder barrel 2 from the rod chamber of the second oil cylinder 3, but cannot reflux.
Concrete materials suffered friction force in pipeline represents with f:
f＝(τ
0+η×∝×v)×s＝(τ
o+kv)×S
Wherein, f is contact area, the τ of concrete shear stress, s concrete and pipeline
0be concrete surrender shear stress, η is concrete viscosity,
it is concrete shear rate.
∝, k are constant coefficients.
The flow graph of said structure, when concrete materials is carried out to test process, material to be measured is placed in cylinder barrel 2, and the first oil cylinder 1 after pressurization can promote a concrete piston and move, and the second oil cylinder 3 promotes cylinder barrel 2 by piston rod and moves up and down.Can preset pressure in cylinder barrel 2 and the translational speed of cylinder barrel 2 by control system 6, each material can be under multiple pressure and translational speed, test several data, thus measure the rheological characteristics of material.Compare with traditional flow graph, have applicable to hyperbaric environment, and can be used for measuring the advantages such as concrete materials under different pressures.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a flow graph, is characterized in that, comprises cylinder barrel (2), is arranged at two concrete pistons, pressue device in described cylinder barrel (2), drive unit; Described pressue device is used for driving at least one concrete piston to pressurize to the concrete of cylinder barrel (2); Described drive unit is used for promoting described cylinder barrel (2) and moves with respect to concrete piston; Described flow graph also comprises pressure-detecting device, and described pressure-detecting device is for detection of the concrete pressure in described cylinder barrel (2); Described flow graph also comprises speed detector, and described speed detector is the movement velocity with respect to concrete piston for detection of described cylinder barrel (2).
2. flow graph according to claim 1, is characterized in that, described pressue device is the first oil cylinder (1), and the cylinder tube of described the first oil cylinder (1) or piston rod are fixedly connected with one end of described concrete piston.
3. flow graph according to claim 2, is characterized in that, described drive unit is the second oil cylinder (3), and one end of described the second oil cylinder (3) is fixedly installed on described cylinder barrel (2).
4. flow graph according to claim 3, it is characterized in that, described cylinder barrel is fixedly installed web member on (2), the quantity of described the second oil cylinder (3) is two, two described the second oil cylinders (3) are parallel to described cylinder barrel (2) setting, and one end of two described the second oil cylinders (3) is fixedly connected with described web member respectively.
5. flow graph according to claim 4, is characterized in that, described flow graph comprises frame (4), and the other end of the second oil cylinder (3) and described the first oil cylinder (1) are arranged at respectively in described frame (4).
6. flow graph according to claim 1, is characterized in that, described flow graph also comprises control system (6), and described control system (6) is for controlling pressue device and drive unit action.
7. flow graph according to claim 1, is characterized in that, described pressure-detecting device is pressure transducer, and/or described speed detector is displacement transducer.
8. flow graph according to claim 3, is characterized in that, described flow graph also comprises oil pump (7), and described oil pump (7) is for driving described the first oil cylinder (1) and the second oil cylinder (3).
9. flow graph according to claim 8, is characterized in that, is also provided with flow speed control valve (8) on the oil-feed of described the second oil cylinder (3) or return line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241201.0A CN104020077B (en) | 2014-06-03 | 2014-06-03 | Rheometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410241201.0A CN104020077B (en) | 2014-06-03 | 2014-06-03 | Rheometer |
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| Publication Number | Publication Date |
|---|---|
| CN104020077A true CN104020077A (en) | 2014-09-03 |
| CN104020077B CN104020077B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410241201.0A Active CN104020077B (en) | 2014-06-03 | 2014-06-03 | Rheometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316438A (en) * | 2014-11-03 | 2015-01-28 | 北京新奥混凝土集团有限公司 | Traction-type concrete pumping performance tester and test method thereof |
| CN111829922A (en) * | 2020-08-17 | 2020-10-27 | 湘潭大学 | A flow characteristic measuring device for simulating the actual pumping process of concrete |
| CN112485157A (en) * | 2020-12-15 | 2021-03-12 | 中国科学院空间应用工程与技术中心 | Soft material fluidity detection device |
| CN114112795A (en) * | 2021-11-09 | 2022-03-01 | 东南大学 | A test device and test method for fresh concrete and boundary resistance characteristics |
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| US4794799A (en) * | 1985-04-03 | 1989-01-03 | Ilmari Paakkinen | Method of and an apparatus for measuring the properties, particularly the compactibility of a stiff mass to be cast |
| US5327778A (en) * | 1992-02-10 | 1994-07-12 | Park Noh A | Apparatus and method for viscosity measurements using a controlled needle viscometer |
| DE102004015707A1 (en) * | 2004-03-29 | 2005-11-03 | Technische Universität Berlin | Rheometer for measuring characteristics of a non-Newtonian medium includes a device measuring time taken for a ball-shaped body that falls through medium contained in a housing, optionally with assistance of additional weights |
| CN101403675A (en) * | 2008-11-14 | 2009-04-08 | 哈尔滨工业大学 | Novel mixed concrete viscosity measuring instrument |
| CN201497692U (en) * | 2009-07-10 | 2010-06-02 | 天津市建筑科学研究院 | Numerically controlled intelligent tester of concrete viscosity |
| CN102607997A (en) * | 2012-02-17 | 2012-07-25 | 哈尔滨工业大学 | Fresh concrete viscosity measuring apparatus |
| CN203011798U (en) * | 2012-11-30 | 2013-06-19 | 长沙理工大学 | Comprehensive fresh cement concrete performance tester |
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2014
- 2014-06-03 CN CN201410241201.0A patent/CN104020077B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4794799A (en) * | 1985-04-03 | 1989-01-03 | Ilmari Paakkinen | Method of and an apparatus for measuring the properties, particularly the compactibility of a stiff mass to be cast |
| US5327778A (en) * | 1992-02-10 | 1994-07-12 | Park Noh A | Apparatus and method for viscosity measurements using a controlled needle viscometer |
| DE102004015707A1 (en) * | 2004-03-29 | 2005-11-03 | Technische Universität Berlin | Rheometer for measuring characteristics of a non-Newtonian medium includes a device measuring time taken for a ball-shaped body that falls through medium contained in a housing, optionally with assistance of additional weights |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316438A (en) * | 2014-11-03 | 2015-01-28 | 北京新奥混凝土集团有限公司 | Traction-type concrete pumping performance tester and test method thereof |
| CN104316438B (en) * | 2014-11-03 | 2016-06-15 | 北京新奥混凝土集团有限公司 | A kind of towed concrete pumping performance test instrument and test method thereof |
| CN111829922A (en) * | 2020-08-17 | 2020-10-27 | 湘潭大学 | A flow characteristic measuring device for simulating the actual pumping process of concrete |
| CN111829922B (en) * | 2020-08-17 | 2023-01-20 | 湘潭大学 | Flow characteristic measuring device for simulating concrete actual pumping process |
| CN112485157A (en) * | 2020-12-15 | 2021-03-12 | 中国科学院空间应用工程与技术中心 | Soft material fluidity detection device |
| CN112485157B (en) * | 2020-12-15 | 2022-11-29 | 中国科学院空间应用工程与技术中心 | Soft material fluidity detection device |
| CN114112795A (en) * | 2021-11-09 | 2022-03-01 | 东南大学 | A test device and test method for fresh concrete and boundary resistance characteristics |
| WO2023082610A1 (en) * | 2021-11-09 | 2023-05-19 | 东南大学 | Test apparatus and test method for resistance characteristics between fresh concrete and boundary |
| CN114112795B (en) * | 2021-11-09 | 2024-01-12 | 东南大学 | Test device and test method for fresh concrete and boundary resistance characteristics |
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| CN104020077B (en) | 2017-01-04 |
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