CN208125560U - A kind of paste materials Limiting shear stress test device - Google Patents
A kind of paste materials Limiting shear stress test device Download PDFInfo
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- CN208125560U CN208125560U CN201820730346.0U CN201820730346U CN208125560U CN 208125560 U CN208125560 U CN 208125560U CN 201820730346 U CN201820730346 U CN 201820730346U CN 208125560 U CN208125560 U CN 208125560U
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Abstract
The utility model relates to a kind of paste materials Limiting shear stress test device, including pedestal, the pillar being set on pedestal, the graduated scale and connecting shaft being set on pillar, being pivotally connected in connecting shaft has a crossbeam and a pointer, and crossbeam and pointer are fixed together, and crossbeam can be rotated around connecting shaft；Crossbeam equal length at left and right sides of connecting shaft；Crossbeam both ends are respectively fixed with a pallet, and two pallets are symmetrical arranged and are equal in weight, and are placed with beaker on left pallet, counterweight is placed on right pallet, it is further fixed on hook on crossbeam below right pallet, the thin slice of line with a scale is hung on hook, thin slice lower end is inserted in the slurry in slurries box.The apparatus structure of the utility model is simple, and operation is easy, verified accurate to slurry Limiting shear stress test result, lower compared to traditional test equipment price, suitable for being widely used to promote.
Description
Technical field
The utility model relates to paste materials Mechanics Performance Testing fields, cut and answer more particularly to a kind of paste materials limit
Force test device.
Background technique
Slurry is the higher fluid of stickiness, and frictional force of the Limiting shear stress inside slurry is that characterization slurry is anti-
One of most important mechanics parameter of important indicator and slurry of ability of anti-deformation.Rheometer and viscosimeter are mainly used at present
The test job of slurry Limiting shear stress parameter being carried out, but rheometer and viscosimeter price are higher, test process is also complex,
Need the experimenter of profession that can operate.Based on the above reasons, it needs to find in practical work a kind of not only easy but also quasi-
Really, the test device of relative low price.
Summary of the invention
The purpose of this utility model is to provide a kind of paste materials Limiting shear stress test device, the test device structures
Simply, it is readily produced, test result is accurate, and it is simple easy to operate, and does not limit professional, those of ordinary skill in the art
The test of Limiting shear stress can be carried out to the higher slurry of stickiness according to the method, and the device compared to rheometer and glues
Degree meter, price is lower, is suitable for promoting.
The solution of the purpose of this utility model and its technical problem adopts the following technical solutions to realize.According to this reality
With a kind of paste materials Limiting shear stress test device of novel proposition, including：Pedestal, the pillar being set on pedestal, setting
In pillar upper end graduated scale and be set to the connecting shaft of in the middle part of pillar or middle and upper part, be pivotally connected in connecting shaft have a crossbeam and
One pointer, the crossbeam and the pointer are fixed together；Positioned at the equal length of the crossbeam of connecting shaft left and right side；Connecting shaft is left
Side one end of the beam is provided with left pallet, and one end of the beam is provided with right pallet on the right side of connecting shaft, the shape of left pallet and right pallet, big
It is small, weight is just the same, and the two being equidistant apart from connecting shaft center；
It is placed with a beaker on left pallet, counterweight is placed on right pallet, a hook is further fixed on the crossbeam of right side, the extension
Hook is to hang with a thin slice on the lower section of right pallet, hook, and thin slice upper end is hung on hook, and lower end is inserted in the slurry in slurries box
In body, slurries box and pedestal are placed on same table top, and slurries box is located at hook lower section, are additionally provided with graduation mark on thin slice.
The solution of the purpose of this utility model and its technical problem also can be used following technical scheme and further realize.
Paste materials Limiting shear stress test device above-mentioned, wherein the crossbeam and pointer are rotated around connecting shaft simultaneously.
Paste materials Limiting shear stress test device above-mentioned, wherein the left pallet and right pallet are pair with connecting shaft
Point is claimed to be fixed on left side beams and right side crossbeam, fixed form is welding or screw connection.
Paste materials Limiting shear stress test device above-mentioned, wherein the material of the hook is hard metal, hook
It is removably fixed in crossbeam；Sheet surface roughness is greater than 25, and thickness is less than 1mm, and the upper end is provided with circular hole, for hanging over
On hook.
Paste materials Limiting shear stress test device above-mentioned, wherein the midpoint scale of the graduated scale is 0.
Paste materials Limiting shear stress test device above-mentioned, wherein the pedestal is solid cast material, is used to support
With the entire test device of stabilization.
The device construction of the utility model is relatively easy, and cost is relatively low, is suitable for producing in enormous quantities, and the dress of the utility model
The method set for testing slurry Limiting shear stress is simple and easy to operate, does not limit professional, and those of ordinary skill in the art are equal
It can be tested according to the method, verified, the slurry limit that the test device and test method of the utility model obtain is cut
Stress test data are compared with traditional rheometer and viscosimeter, and error is very small, and test result is accurate and reliable, expanded can make
With.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow the above and other purpose, feature of the utility model
It can be more clearly understood with advantage, special below to lift preferred embodiment, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the structure diagram of the utility model.
In figure, 1：Pedestal 2：Pillar 3：Graduated scale 4：Connecting shaft 5：Crossbeam 6：Pointer 7：Left pallet 8：Right pallet
9：Beaker 10：Counterweight 11：Hook 12：Thin slice 13：Slurries box 14：Slurry
Specific embodiment
Further to illustrate that the utility model is the technical means and efficacy reaching predetermined goal of the invention and being taken, below
In conjunction with preferred embodiment, to according to the utility model proposes a kind of paste materials Limiting shear stress test device, it is specific real
Mode, feature and its effect are applied, detailed description is as follows.
The test device of the utility model includes pedestal 1, and the pillar 2 being set on pedestal is set to the quarter of pillar upper end
It spends ruler 3 and is set to the connecting shaft 4 of pillar middle part or middle and upper part, being pivotally connected in connecting shaft has a crossbeam 5 and a pointer 6, and
The crossbeam 5 and the pointer 6 are fixed together, and crossbeam 5 and pointer 6 can be rotated around connecting shaft 4 simultaneously.Positioned at the left side of connecting shaft 4 and
The equal length of the crossbeam on right side.By the scale on graduated scale towards for operator, the setting of connecting shaft left side beams one end
There is left pallet 7, one end of the beam is provided with right pallet 8 on the right side of connecting shaft, and left pallet and right pallet are fixed by symmetric points of connecting shaft
In left side beams and right side crossbeam, fixed form is welding or screw connection.The shape of left pallet and right pallet, size, weight
It is just the same, and distance of the two apart from connecting shaft center is also equal.
It is placed with a beaker 9 being filled with water on left pallet 7, counterweight 10 is placed on right pallet, is gone back on the crossbeam of right side detachable
It is fixed with a hook 11, which is to hang with a thin slice 12 on the lower section of right pallet, hook, and thin slice lower end is inserted in slurries box
In slurry 14 in 13, slurries box 13 and pedestal 1 are placed on table top, and slurries box 13 is located at 11 lower section of hook, are also set on thin slice
It is equipped with graduation mark.
Further, pedestal is solid cast material, is used to support and stablizes entire test device.The material of hook is hard
Metal.Thin slice has coarse surface, and roughness is more preferably greater than 25, and thickness is less than 1mm, and the upper end is provided with circular hole, is used for
It hangs on hook.The midpoint scale of graduated scale is 0.
Use above-mentioned apparatus test slurry Limiting shear stress method for：A beaker is placed on left pallet, on right pallet
It is placed with counterweight, the quality of counterweight is slightly larger than the quality of beaker, adds water into beaker with measuring cup, until left and right ends are close to when balancing
(pointer close to midpoint), uses dropper instead and water is added dropwise into beaker, until left and right ends complete equipilibrium, pointer is directed toward graduated scale midpoint.
Slurries to be measured are poured into slurries box, then hang over thin slice one end on hook, the other end is inserted into slurries, by plus-minus beaker
Water make pointer at this time be directed toward graduation mark midpoint, write down left and right ends balance after scale of the slurry liquid level on thin slice,
The depth h in slice insertion slurry is calculated, that is, is located at the length of the thin slice in slurry；
In the state of the equilibrium, it is dripped with graduated dropper into beaker, stops dripping immediately when pointer starts deflection
Water, writes down the water Δ v of instillation, and the water Δ v of the instillation initial water can subtract surplus water and obtain from scale buret；
The Limiting shear stress of slurry acquires according to the following formula in slurries box：
τ=Δ v/2bh
In formula：τ is the Limiting shear stress of slurry, unit：g/cm2；
Δ v is pointer since equilibrium state to the water that deflection instills just, unit：ml；
B is the width of thin slice, unit：cm；
H is the depth that thin slice is inserted into slurry, unit：cm；
Above formula is that the weight of the water instilled according to equilibrium principle, the left side is equal to the friction that the thin slice of the right insertion slurry is subject to
Power, since the density of water is 1g/cm3, the weight for the water that the left side instills is Δ v × 1=Δ v (unit：G), the right thin slice
Thickness is ignored, and the forced area on thin slice two sides is：2 × b × h=2bh (unit：cm2), thin slice two faces in the right are subject to
Frictional force is：F=2bh × τ=2bh τ (unit：g)；
Then：Δ v=2bh τ, obtains：τ=Δ v/2bh, unit：g/cm2τ=Δ v/2bh, unit：g/cm2；1g/cm2=
102Pa。
Embodiment 1：
Test temperature is set as 20 DEG C, the shear rate of rotational viscometer is 1s-1, respectively using Yoghourt and honey as object,
Test the Limiting shear stress of two kinds of slurries, test result such as table 1：
The Limiting shear stress test result of 1 viscosimeter of table and apparatus of the present invention to Yoghourt and honey
As shown in Table 1：Two kinds of common slurries：Yoghourt and honey, standard limit shearing stress be respectively 150Pa and
3000Pa, respectively with the Limiting shear stress of both NDJ-5S rotational viscometer and utility model device measurement, setting rotates viscous
The shear rate of degree meter is 1s-1, the viscosity that viscosimeter measures Yoghourt and honey is respectively 155Pas and 3070Pas, according to
Limiting shear stress calculation formula
τ=η D
In formula：τ is Limiting shear stress, unit Pa；η is viscosity, unit Pas；D shear rate, unit s-1
The Limiting shear stress that Yoghourt and honey are obtained according to above formula is respectively 155Pa and 3070Pa, and error is respectively 3.3%
With 2.3%.The Limiting shear stress of the Yoghourt and honey that are measured using utility model device is respectively 157Pa and 3090Pa, is missed
Difference is respectively 4.7% and 3.0%, and the test error of utility model device is slightly larger than the test error of viscosimeter, but error exists
Within allowed band (less than 5%).
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation be not intended to limit the utility model although the utility model has been disclosed with preferred embodiment as above, it is any ripe
Professional and technical personnel is known, is not being departed within the scope of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, but all without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still
It is within the scope of the technical solutions of the present invention.
Claims (5)
1. a kind of paste materials Limiting shear stress test device, it is characterised in that including pedestal (1), be set on pedestal (1)
Pillar (2) is set to the graduated scale (3) of pillar (2) upper end and is set to the connecting shaft (4) of pillar middle part or middle and upper part, connection
Being pivotally connected on axis (4) has a crossbeam (5) and a pointer (6), and the crossbeam and the pointer are fixed together；Positioned at a connecting shaft left side
The equal length of the crossbeam of side and right side；Connecting shaft left side beams one end is provided with left pallet (7), one end of the beam on the right side of connecting shaft
It is provided with right pallet (8), shape, size, the weight of left pallet and right pallet are just the same, and the two is in connecting shaft (4)
The heart is equidistant；
It is placed with a beaker (9), is placed on right pallet counterweight (10) on left pallet, be further fixed on a hook on the crossbeam of right side
(11), which is to hang with a thin slice (12) on the lower section of right pallet (8), hook, and thin slice upper end is hung on hook,
Lower end is inserted in the slurry (14) in slurries box (13), and slurries box (13) and pedestal (1) are placed on same table top, slurries box position
In hook lower section, thin slice is additionally provided with graduation mark on (12).
2. paste materials Limiting shear stress test device as described in claim 1, it is characterised in that the crossbeam (5) and pointer
(6) it is rotated simultaneously around connecting shaft (4).
3. paste materials Limiting shear stress test device as described in claim 1, it is characterised in that the left pallet (7) and the right side
Pallet (8) is individually fixed in left side beams and right side crossbeam by symmetric points of connecting shaft, and fixed form is welding or screw connection.
4. paste materials Limiting shear stress test device as described in claim 1, it is characterised in that the hook (11) is removable
It unloads and is fixed on crossbeam；The surface roughness of thin slice (12) is greater than 25, and thickness is less than 1mm, and the upper end is provided with circular hole, hangs over hook
(11) on.
5. paste materials Limiting shear stress test device as described in claim 1, it is characterised in that in the graduated scale (3)
Point scale is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820730346.0U CN208125560U (en) | 2018-05-16 | 2018-05-16 | A kind of paste materials Limiting shear stress test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820730346.0U CN208125560U (en) | 2018-05-16 | 2018-05-16 | A kind of paste materials Limiting shear stress test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333081A (en) * | 2018-05-16 | 2018-07-27 | 洛阳理工学院 | A kind of paste materials Limiting shear stress test device and test method |
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2018
- 2018-05-16 CN CN201820730346.0U patent/CN208125560U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333081A (en) * | 2018-05-16 | 2018-07-27 | 洛阳理工学院 | A kind of paste materials Limiting shear stress test device and test method |
| CN108333081B (en) * | 2018-05-16 | 2024-02-06 | 洛阳理工学院 | Device and method for testing ultimate shear stress of slurry material |
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