CN107144496A - Spray castable service behaviour test device and method of testing - Google Patents
Spray castable service behaviour test device and method of testing Download PDFInfo
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- CN107144496A CN107144496A CN201710379432.1A CN201710379432A CN107144496A CN 107144496 A CN107144496 A CN 107144496A CN 201710379432 A CN201710379432 A CN 201710379432A CN 107144496 A CN107144496 A CN 107144496A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
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Abstract
The present invention provides a kind of spray castable service behaviour test device and method of testing, mobility status of the spray castable in pipeline can be simulated, pass through the distribution of particle in the complexity and flow process of flowing, the stopping state and segregation situation of reactive spray castable directly perceived.The invention closing to reality application, obtained visual result is reliable, the transportation performance of energy effective evaluation spray castable in the duct, provides evaluation criterion for the design of spray castable, so as to optimize the configuration of spray castable, improves service behaviour and performance.
Description
【Technical field】
The invention belongs to technical field of refractory castable, more particularly to a kind of it is used to evaluate spray castable service behaviour
Test device and the method for testing using the device.
【Background technology】
Unshape refractory due to simple production process, easy construction, the low advantage of energy resource consumption and be widely used in
The field such as ironmaking, steel-making, building materials, coloured, and as the developing direction of following refractory material.As industrial use performance will
Ask, form of construction work is more and more diversified, the species of unshape refractory is also growing day by day.In recent years, spray castable because
For have the advantages that labor intensity is low, efficiency of construction is high and can long distance pumping, be gradually widely used in blast furnace, blast furnace casting
The occasions such as ditch, fish torpedo ladle, tundish, heating furnace, incinerator, cement kiln.It is defeated that spray castable work progress relates generally to pipeline
Send with two aspects of lance ejection, wherein pipeline well, stable is the crucial mistake that spray castable is capable of smooth construction
Journey.It is unimpeded without blocking that sprayed construction effect and the good material of using effect need it to continue during pipeline transportation
Pipeline, and keep stable new state of mixing to keep good service behaviour without generation segregation, i.e. entirety.
In actual use, because material unreasonable allocation causes spray castable to have hair when blocking the phenomenon of pipeline
It is raw, influence efficiency of construction；Simultaneously as long distance transportation, unreasonable allocation, the castable stirred also occur that segregation shows
As causing the material at high temperature performance ejected to substantially reduce.Therefore, using effectively evaluating spray castable workability
The method of energy is most important.At present, the evaluation method on spray castable service behaviour, is concentrated mainly on using test gravity flow
The method of value, the excellent of material service behaviour is weighed according to from the size of flow valuve.Although this method can reflect to a certain extent
Go out the mobility of material, but its method of testing deviates actual, it is impossible to reflect that spray castable really flows shape in the duct
State, often brings misleading to production person people, is caused damage to enterprise.
【The content of the invention】
In order to overcome defect present on existing spray castable service behaviour method of testing, the present invention proposes a kind of spray
Castable service behaviour test device and method of testing are penetrated, the shape that spray castable flows in the duct is more accurately evaluated
State.
A kind of spray castable service behaviour test device that the present invention is provided, including transparent test pipeline, piston, branch
Bar and pressue device；The test pipeline include vertical pipeline, with graduated horizontal pipe and connect the vertical pipeline with
The connecting pipe of the horizontal pipe；Described pole one end is connected with the piston, and the other end is connected with the pressue device
Connect；The piston can extend into the vertical pipeline and coordinate with the inner wall sealing of the vertical pipeline；The pressue device leads to
Crossing the pole slides up and down inwall of the piston along the vertical pipeline；The connecting pipe is curved and the connection
The junction of pipeline and the horizontal pipe is provided with valve.
In a preferred embodiment, the internal diameter of the vertical pipeline is 70-80mm, and the internal diameter of the horizontal pipe is
40-50mm。
In a preferred embodiment, the test pipeline is made up of PC materials.
A kind of spray castable workability based on above-mentioned spray castable service behaviour test device that the present invention is provided
Energy method of testing, comprises the following steps：
1) in the case where the valve is closed, a certain amount of spray castable is loaded into the vertical pipeline and the company
In adapter road, standing makes spray castable filling uniform；
2) piston is put into the vertical pipeline and slowly moving the piston makes it upper with spray castable
Surface is contacted；
3) open the valve and allow the pressue device to apply certain pressure to the piston simultaneously；
4) after the spray castable in the vertical pipeline flows to end, the pressue device, which stops applying to the piston, presses
The flow distance and flowing time of spray castable in power, recording level pipeline；
5) size for the pressure that the pressue device applies to the piston, repeat step 1 are adjusted) to step 4)；
6) to step 1) to step 5) at a series of flow distances, flowing time and the corresponding pressure that obtain
Reason, obtains the relation of pressure and flow velocity.
In a preferred embodiment, step 6) in, the relational expression of pressure and flow velocity is P=K0+ μ f (V), wherein,
K0Reflect the complexity that sample flows in pipeline with μ.
In a preferred embodiment, by step 5) after the completion of the horizontal pipe with spray castable that obtains carry out
Maintenance, drying, then segmentation are cut, the distribution of particle and the profit formed at the horizontal pipe inwall on observation cross section
Slip layer, judges segregation situation of the spray castable in flowing.
In a preferred embodiment, the pressure that the pressue device is put on the piston every time be it is constant,
Pressure limit is 0-2MPa.
In a preferred embodiment, step 1) in, load every time in the connecting pipe and the vertical pipeline
The quality of spray castable is 3-6Kg.
In a preferred embodiment, step 1) in, spray castable is loaded into the connecting pipe and described vertical
After in pipeline, standing 15-30s makes spray castable filling uniform.
The spray castable service behaviour test device and method of testing that the present invention is provided can simulate spray castable and exist
Mobility status in pipeline, by the distribution of particle in the complexity and flow process of flowing, reactive spray directly perceived is poured
The stopping state and segregation situation of material feeding.The invention closing to reality application, obtained visual result is reliable, can effective evaluation injection
The transportation performance of castable in the duct, evaluation criterion is provided for the design of spray castable, so as to optimize spray castable
Configuration, improves service behaviour and performance.In addition, also having device simple, operation is easy, easy to maintenance, sample demand
It is few, cost compared with advantage.
【Brief description of the drawings】
The schematic diagram for the spray castable service behaviour test device that Fig. 1 provides for the present invention.
Fig. 2 is flow regime signals of the spray castable A in spray castable service behaviour test device in embodiment 1
Figure.
Fig. 3 is flow regime signals of the spray castable B in spray castable service behaviour test device in embodiment 2
Figure.
【Embodiment】
Referring to Fig. 1, the present invention provides a kind of spray castable service behaviour test device 100, including transparent test
Pipeline 10, piston 20, pole 30 and pressue device 40.
Specifically, the test pipeline 10 is including vertical pipeline 11, with graduated horizontal pipe 12 and connects described perpendicular
The connecting pipe 13 of straight pipeline 11 and the horizontal pipe 12.Described one end of pole 30 is connected with the piston 20, the other end
It is connected with the pressue device 40.The piston 20 can be from the one end of the vertical pipeline 11 away from the connecting pipe 13
Stretch into the vertical pipeline 11 and coordinate with the inner wall sealing of the vertical pipeline 11.The pressue device 40 passes through the pole
30 slide up and down inwall of the piston 20 along the vertical pipeline 11.The connecting pipe 13 is curved and the connecting tube
The junction in road 13 and the horizontal pipe 12 is provided with valve 50.The valve 50 be used for control the connecting pipe 13 with it is described
Whether connected between horizontal pipe 12, i.e., when the valve 50 is opened, the connecting pipe 13 is led with the horizontal pipe 12
Logical, when the valve 50 is closed, the connecting pipe 13 can not be turned on the horizontal pipe 12.
It is preferred that, the internal diameter of the vertical pipeline 11 is 70-80mm, and the internal diameter of the horizontal pipe 12 is 40-50mm.Institute
Test pipeline 10 is stated to be made by possessing the PC of high intensity (makrolon) material.
The present invention also provides a kind of spray castable service behaviour method of testing, and the process employs above-mentioned spray castable
Service behaviour test device 100 simultaneously comprises the following steps：
1) in the case where the valve 50 is closed, a certain amount of spray castable is loaded into the vertical pipeline 11 and institute
State in connecting pipe 13, standing makes spray castable filling uniform；
2) piston 20 is put into the vertical pipeline 11 and slowly moving the piston 20 makes it be poured into a mould with injection
The upper surface of material；
3) open the valve 50 and allow the pressue device 40 to apply certain pressure to the piston 20 simultaneously；
4) after the spray castable in the vertical pipeline 11 flows to end, the pressue device 40 stops to the piston 30
Apply the flow distance and flowing time of spray castable in pressure, recording level pipeline 12；
5) size for the pressure that the pressue device 40 applies to the piston 20, repeat step 1 are adjusted) to step 4)；
6) to step 1) to step 5) at a series of flow distances, flowing time and the corresponding pressure that obtain
Reason, obtains the relation of pressure and flow velocity.
Specifically, the pressure that the pressue device 40 is put on the piston 20 every time is constant, pressure limit is
0-2MPa.Step 1) in, the quality that the connecting pipe 13 and the spray castable in the vertical pipeline 11 are loaded every time is
Standing 15-30s is needed to make spray castable filling uniform after 3-6Kg, and loading.
Further, step 6) in, the relational expression of pressure (P) and flow velocity (V) is P=K0+ μ f (V), wherein, K0It is anti-with μ
The complexity that sample flows in pipeline is reflected, the possibility for blocking pipeline is estimated.In addition, by step 5) after the completion of the band that obtains
The horizontal pipe for having spray castable is conserved, dried, and then segmentation is cut, can observe on cross section the distribution of particle and
The lubricating layer formed at the flat inwall of pipeline 12 described in water, judges segregation situation of the spray castable in flowing.
The principle of the present invention is：The spray castable sample loaded in the vertical pipeline 11 flows through the connecting tube of arc
Road 13 flows to the direction of horizontal pipe 12, simulates travel position of the spray castable in pipeline during practice of construction；Enter
One step, apply pressure by 40 pairs of pistons 20 of pressue device and reach the purpose pressurizeed to spray castable, simulate and apply
Influence of the pumping pressure to spray castable flow regime during work；In addition, the rheology principle based on spray castable,
By recording flow distance and flowing time of the sample in the horizontal pipe 12, analysis obtains pressure and the mathematics of flow velocity is closed
It is formula P=K0+ μ f (V), wherein, K0(unit, Pa) represents the kinetic force of friction (critical pressure) that sample flows in horizontal pipe,
The active force that i.e. sample overcomes required for being flowed in pipeline, its value is smaller to reflect material rodability better, otherwise can
Transportability poorer, μ values represent the apparent viscous force of material when sample flows in pipeline, the phase relation of reflection flow and pressure
Pressure needed for the smaller increase flow of number, i.e. its value is just smaller, and material is easy to be transportability just more preferable in pipeline, while μ values may be used also
The segregation reflected during sample transport, the bigger anti-segregation of μ values just better, just poorer, suitable K on the contrary0, μ ensure that
The stable travel position of spray castable, the possibility for blocking pipeline is predicted with this；By horizontal pipe 12 and internal sample one
Play maintenance, dry, remain the flow regime of sample, beneficial to observation segregation situation.
Embodiment 1
In the present embodiment, the vertical pipeline 11 of spray castable service behaviour test device 100 and horizontal pipe 12 it is interior
Footpath is respectively 75mm, 40mm, and length is respectively 300mm, 800mm.The spray castable service behaviour carried out using the device
In method of testing, 3Kg spray castable is loaded in the vertical pipeline 11 and the connecting pipe 13 every time, 15s is stood
After open the valve 50, at the same time, the attachment means 40 put on the piston 20 constant pressure be P1=1MPa.
Also referring to Fig. 2, the spray castable A being located in horizontal pipe 12 after observation maintenance, drying is understood, injection
Castable A bulky grain concentrates on the bottom of horizontal pipe 12, and matrix slurry is distributed in top, occurs in that serious segregation.This
Outside, the constant pressure for putting on the piston 20 is changed to P2=0.2MPa, P3=0.5MPa, P4=0.7MPa, P5=
1.2Mpa、P6=1.5MPa, P7=1.8MPa, respectively obtains flow velocity V1、V2、V3、V4、V5、V6、V7, using the analysis of linear regression
Method obtains the mathematical relationship P=K of pressure and flow velocity0+ μ f (V), K0Mismatched with μ, illustrate spray castable A pipeline transportations
Service behaviour is poor.
Embodiment 2
In the present embodiment, using the spray castable service behaviour test device 100 described by embodiment 1 and parameter testing
Spray castable B service behaviour.Also referring to Fig. 3, the injection being located in horizontal pipe 12 after observation maintenance, drying is poured
Material feeding B understands that distribution of particles of the spray castable B in horizontal pipe 12 is more uniform, and obvious segregation is not observed and shows
As, meanwhile, there is a thin layer of lubricating layer in the place contacted with horizontal pipe 12, show spray castable B in horizontal pipe
Service behaviour is good in 12.In addition, changing the mathematical relationship P=K that pressure obtains pressure and flow velocity0+ μ f (V), K0Matched with μ
Properly, illustrate that spray castable B is suitable to transport in pipeline.
The spray castable service behaviour test device and method of testing that the present invention is provided can simulate spray castable and exist
Mobility status in pipeline, by the distribution of particle in the complexity and flow process of flowing, reactive spray directly perceived is poured
The stopping state and segregation situation of material feeding.The invention closing to reality application, obtained visual result is reliable, can effective evaluation injection
The transportation performance of castable in the duct, evaluation criterion is provided for the design of spray castable, so as to optimize spray castable
Configuration, improves service behaviour and performance.In addition, also having device simple, operation is easy, easy to maintenance, sample demand
It is few, cost compared with advantage.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is to combine specific preferred embodiment to institute of the present invention
The further description of work, it is impossible to assert that the specific implementation of the present invention is confined to these explanations.It is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of spray castable service behaviour test device, it is characterised in that：Including transparent test pipeline, piston, pole
And pressue device；The test pipeline includes vertical pipeline, with graduated horizontal pipe and the connection vertical pipeline and institute
State the connecting pipe of horizontal pipe；Described pole one end is connected with the piston, and the other end is connected with the pressue device；
The piston can extend into the vertical pipeline and coordinate with the inner wall sealing of the vertical pipeline；The pressue device passes through institute
Stating pole slides up and down inwall of the piston along the vertical pipeline；The connecting pipe is curved and the connecting pipe
Valve is provided with the junction of the horizontal pipe.
2. spray castable service behaviour test device as claimed in claim 1, it is characterised in that：The vertical pipeline it is interior
Footpath is 70-80mm, and the internal diameter of the horizontal pipe is 40-50mm.
3. spray castable service behaviour test device as claimed in claim 1, it is characterised in that：The test pipeline is by PC
Material is made.
4. a kind of injection cast of the spray castable service behaviour test device in 1-3 based on claim described in any one
Expect service behaviour method of testing, it is characterised in that：Comprise the following steps：
1) in the case where the valve is closed, a certain amount of spray castable is loaded into the vertical pipeline and the connecting tube
In road, standing makes spray castable filling uniform；
2) piston is put into the vertical pipeline and slowly moved the upper surface that the piston makes it with spray castable
Contact；
3) open the valve and allow the pressue device to apply certain pressure to the piston simultaneously；
4) after the spray castable in the vertical pipeline flows to end, the pressue device stops applying pressure to the piston,
The flow distance and flowing time of spray castable in recording level pipeline；
5) size for the pressure that the pressue device applies to the piston, repeat step 1 are adjusted) to step 4)；
6) to step 1) to step 5) a series of flow distances, flowing time and the corresponding pressure that obtain handles, obtains
To the relation of pressure and flow velocity.
5. spray castable service behaviour method of testing as claimed in claim 4, it is characterised in that：Step 6) in, pressure with
The relational expression of flow velocity is P=K0+ μ f (V), wherein, K0Reflect the complexity that sample flows in pipeline with μ.
6. spray castable service behaviour method of testing as claimed in claim 5, it is characterised in that：By step 5) after the completion of obtain
The horizontal pipe with spray castable obtained is conserved, dried, and then segmentation is cut, the distribution of particle on observation cross section
And the lubricating layer formed at flat inner-walls of duct described in water, judge segregation situation of the spray castable in flowing.
7. spray castable service behaviour method of testing as claimed in claim 4, it is characterised in that：The pressue device is each
The pressure put on the piston is constant, and pressure limit is 0-2MPa.
8. spray castable service behaviour method of testing as claimed in claim 4, it is characterised in that：Step 1) in, fill every time
The quality for entering the connecting pipe and the spray castable in the vertical pipeline is 3-6Kg.
9. spray castable service behaviour method of testing as claimed in claim 4, it is characterised in that：Step 1) in, it will spray
After castable loads in the connecting pipe and the vertical pipeline, standing 15-30s makes spray castable filling uniform.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110501138A (en) * | 2019-08-28 | 2019-11-26 | 上海建工集团股份有限公司 | Concrete pumping whole process simulation test device and detection method |
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