CN211963776U - Stirring device for suspension in particle analysis test measuring cylinder by hydrometer method - Google Patents
Stirring device for suspension in particle analysis test measuring cylinder by hydrometer method Download PDFInfo
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- CN211963776U CN211963776U CN201922214153.7U CN201922214153U CN211963776U CN 211963776 U CN211963776 U CN 211963776U CN 201922214153 U CN201922214153 U CN 201922214153U CN 211963776 U CN211963776 U CN 211963776U
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Abstract
The invention discloses a stirring device for suspension in a measuring cylinder of a particle analysis test by a hydrometer method, which consists of a device body and is characterized in that the device body comprises a handle, a switch, a motor, a main shaft and a measuring cylinder cover; a motor is arranged in the handle, the lower part of the handle is movably connected with a main shaft, and the main shaft is connected with the measuring cylinder cover through a hole; the axle body of main shaft has the stirring vane group that can make liquid along clockwise flow from top to bottom in the graduated flask through the axle sleeve connection, the end of main shaft is connected the stirring brush, and the device both uses manpower sparingly, reduces intensity of labour, can shorten the churning time under the prerequisite of guaranteeing the stirring, can fully stir the adhesion in the clay granule of graduated flask bottom again to reach the purpose of suspension stirring, guarantee the accuracy of test result.
Description
Technical Field
The utility model relates to a geotechnical test equipment technical field, concretely relates to agitating unit of suspension in hydrometer method particle analysis test graduated flask.
Background
The particle analysis test is one of conventional test projects of a soil engineering laboratory, and the particle analysis test is carried out on the soil sample, so that the content of each particle group in the soil sample can be quantitatively described, and a basis is provided for engineering classification of soil and understanding of engineering properties of the soil. Meanwhile, when the foundation soil is liquefied, the clay content of the soil is one of important indexes, and the clay content needs to be quantitatively analyzed through a particle analysis test. Therefore, the particle analysis test is one of the most important test items in the geotechnical test. The particle analysis test mainly comprises a screening method, a densimeter method, a pipette method and the like, wherein the screening method is applied to the soil with the particle size range of 0.075-60 mm, and the densimeter method and the pipette method are applied to the soil with the particle size range of less than 0.075 mm.
The basis for densitometry is Stokes law. When the soil particles sink in the liquid under their own weight, the larger particles sink faster, while the smaller particles sink slower. It is generally considered that particles having a particle diameter of 0.2 to 0.002mm move at a constant velocity when they sink in a liquid by their own weight, and this conforms to the stokes law. The densitometer method is one of the hydrostatic sedimentation analysis methods, and is only suitable for soil samples with the particle size of less than 0.075 mm. A densimeter method includes pouring a soil sample (with a particle size of less than 0.075mm) with a certain mass into a conical flask, adding pure water, soaking overnight, boiling for about 40 minutes, cooling, pouring into a 1000ml measuring cylinder, adding pure water and a certain amount of dispersant to a volume of 1000ml, putting a stirrer into the measuring cylinder, stirring up and down for 1 minute along the depth of the suspension to uniformly distribute large and small particles of soil in water to prepare a soil suspension with uniform concentration, standing the suspension after stirring is stopped, immediately starting timing to settle soil particles, measuring readings of different densimeters corresponding to different times in the suspension during the soil particle settling process, and calculating the mass percentage of the sample with the particle size smaller than the total mass percentage of the sample according to the readings of the densimeters, the settling time of the soil particles and other parameters. Particle analysis tests using densitometry have to ensure that at the start of a count reading, the soil particles are evenly distributed in suspension, which is relatively static.
At present, when a particle analysis test by hydrometric method is carried out in a laboratory, the suspension in a measuring cylinder is stirred by a stirrer (wheel diameter is 50mm, aperture is 3mm, rod length is about 450mm, and spiral blade is provided) for 1min up and down along the depth of the suspension. This method is not only time consuming and labor intensive, but also can result in uneven mixing. When the hydrometric test is carried out in batches, for example, 100 soil samples are simultaneously tested, stirring is carried out for 1min according to each measuring cylinder during stirring, one tester needs to stir the suspension in each measuring cylinder for 100 min, and the stirring cannot be stopped, so that the manual labor intensity is high; to the great soil sample of viscidity ratio, can have the condition of clay granule adhesion in measuring cylinder bottom and agitator bottom to cause the suspension to stir inhomogeneous and influence the problem of test result.
Through consulting the data, the technical improvement scheme that the discovery predecessor was done is not only the device loaded down with trivial details, and the operation is complicated, and equipment is bulky, is unfavorable for using widely, and the most important is that the adnexed clay granule of thoroughly solution graduated flask bottom can not the intensive mixing problem.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a stirring device for suspension in a particle analysis test measuring cylinder by a hydrometer method. Carry out the stirring of suspension in the hydrometer method graduated flask through this kind of device, both use manpower sparingly, reduce intensity of labour, can shorten the churning time under the prerequisite of guaranteeing the stirring, can fully stir the clay granule of adhesion in the graduated flask bottom again to reach the purpose of suspension stirring, guarantee the accuracy of test result.
The utility model adopts the technical proposal that:
a stirring device for suspension in a particle analysis test measuring cylinder by a hydrometer method is composed of a device body, wherein the device body comprises a handle, a switch, a motor, a main shaft and a measuring cylinder cover; a motor is arranged in the handle, the lower part of the handle is movably connected with a main shaft, and the main shaft is connected with the measuring cylinder cover through a hole; the shaft body of the main shaft is connected with a stirring blade group which can enable liquid in the measuring cylinder to flow in an up-and-down annular mode through a shaft sleeve, and the end head of the main shaft is connected with a stirring brush.
Each group of stirring blade group consists of an inner layer of blades and an outer layer of blades, the diameter of each inner stirring blade is 40-50 mm, each outer stirring blade is positioned outside each inner stirring blade, the outer diameter of each outer stirring blade is 45-55 mm, when the inner layer of blades rotate clockwise in suspension of the measuring cylinder, liquid is pushed to flow downwards, when the outer layer of blades rotate clockwise, the liquid is pushed to flow upwards, a shaft sleeve in the middle of each blade is hollow, the inner diameter of the shaft sleeve is 6-9 mm, the outer diameter of each shaft sleeve is 11-13 mm, a main shaft is connected with the blades through the shaft sleeve in the middle of each blade, and the main shaft is fixed in position by screwing screws on.
The stirring blade group is arranged on the main shaft at least in 3 groups at equal intervals.
The stirring blade group is made of resin materials.
The measuring cylinder cover is made of rubber materials, the diameter of the measuring cylinder cover is large at the top and small at the bottom, the upper part of the measuring cylinder cover is exposed outside the measuring cylinder, the lower part of the measuring cylinder cover can slightly extend into the measuring cylinder, a hole with a diameter slightly larger than that of the main shaft is arranged in the middle of the measuring cylinder cover, and the main shaft can freely move up and down through the hole.
The stirring hairbrush is designed in a straight line shape, the length of the hairbrush is 45-55 mm, the width of the hairbrush is 10-13 mm, the resin material base and the hair, the hair at the bottom, the middle hair are downward, the hair at two sides slightly incline to the outside, and the hairbrush is connected with the main shaft by screwing down a screw on the base.
The switch design on the handle, the motor is in the lower part of handle, and the upper portion of motor is two section No. 1 dry batteries in the handle, for the motor provides the power, whole handle passes through the latched device of lower part and links to each other with the main shaft.
Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
1. thoroughly solved the phenomenon that the adnexed clay granule of graduated flask bottom exists and can not fully stir. When the viscosity of soil particles in a particle analysis test is large, the soil particles can be adhered to the bottom of a measuring cylinder after standing for a period of time in the measuring cylinder and are not easy to stir, and even can be adhered to the bottom of a commonly used manual stirrer during stirring, so that the suspension is stirred unevenly, and the reading of a hydrometer is deviated from the actual value or even wrong. This agitating unit has avoided the emergence of this kind of condition through the stirring brush of bottom fully scrub, stirring.
2. The problem of manual stirring intensity of labour is big is solved. This device drives the (mixing) shaft rotation through the motor that the dry battery provided the power, and main epaxial three-layer blade and axle head stirring brush simultaneous working to make the suspension stir very fast and reach the homogeneous state, testing personnel only need control switch, adjusting device's the up-and-down state can, greatly reduced artifical intensity of labour.
3. The time for stirring is shortened. The suspension stirring device is used for stirring for about 15 seconds in the measuring cylinder, clay particles at the bottom of the measuring cylinder are thoroughly rinsed and stirred, after the suspensions are fully mixed, the switch can be pressed, stirring is stopped, the suspension in the measuring cylinder is kept still for several seconds, and the three layers of stirring blades are used for dividing the suspension into four parts, so that the blades relatively control the flow among the parts, and the suspension is enabled to reach a static state within a short time. Then the test piece is taken out, timing and reading can be started, and the subsequent test steps are carried out. The stirring time is reduced compared to the usual stirring step.
To sum up, this testing device convenient to use has not only reduced tester's intensity of labour, shortens the churning time, and above all thoroughly solved the adnexed clay granule in graduated flask bottom and had the phenomenon that can not the intensive mixing.
Drawings
FIG. 1 is a front view of a stirring device for a suspension in a particle analysis test cylinder according to the hydrometer method of the present invention.
Fig. 2 is an isometric view of a stirring device.
Fig. 3 is a schematic view of the stirring device in a measuring cylinder.
FIG. 4 is a view showing the structure of the stirring blade.
Fig. 5 is a structural view of the agitating brush.
FIG. 6 is a top view of the structure of the stirring blade.
Detailed Description
For a better understanding and an implementation, the present invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the stirring device for the suspension in the particle analysis test measuring cylinder by hydrometric method comprises a handle 1, a switch 2, a motor 3, a main shaft 4, a measuring cylinder cover 5, a first group of stirring blades 901, a second group of stirring blades 902, a third group of stirring blades 903 and a stirring brush 10. The switch is arranged on the handle, the motor is arranged on the lower portion of the handle, two No. 1 dry batteries are arranged on the upper portion of the motor in the handle and used for providing power for the motor, and the whole handle is connected with (separable) the main shaft through the locking mechanism on the lower portion.
As shown in fig. 3, the measuring cylinder cover 5 is made of soft rubber material, and has a large diameter at the top, a small diameter at the bottom, an upper part exposed outside the measuring cylinder, a lower part slightly extending into the measuring cylinder, and a hole in the middle, which has a diameter slightly larger than the main shaft, through which the main shaft can freely move up and down.
As shown in fig. 4, at least 3 groups of stirring blades, namely a first group of stirring blades 901, a second group of stirring blades 902 and a third group of stirring blades 903, are equidistantly distributed on the main shaft. Each group of stirring blades are made of resin materials and consist of an inner layer and an outer layer, the diameter of each inner stirring blade is 44.1mm, each outer stirring blade is located on the outer side of each inner stirring blade and has the outer diameter of 50mm, when the inner layer blades rotate clockwise in suspension of the measuring cylinder, liquid is pushed to flow downwards, when the outer layer blades rotate clockwise, the liquid is pushed to flow upwards, a shaft in the middle of each blade is hollow, the inner diameter of each blade is 8mm, the outer diameter of each blade is 12mm, each group of stirring blades are connected with a main shaft through shaft sleeves, namely the main shaft is connected with the blade group through the shaft sleeves in the middle of the blades, and the position of each group of stirring blades is fixed by screwing screws on.
As shown in figure 5, the stirring brush is designed in a straight line shape, the length is 50mm, the width is 12mm, the resin material base and the hair, the hair at the bottom, the middle hair are downward, the hair at the two sides slightly incline to the outside, and the stirring brush is connected with the main shaft by screwing a screw on the base.
The operation steps of the device when in use are as follows (the previous work is completely prepared, and comprises that the soil sample is boiled and soaked by adding water, poured into a measuring cylinder, the measuring cylinders of the batch are numbered in sequence, and dispersant and water are added to 1000ml, etc.):
A. hold agitating unit's handle 1, will the utility model discloses agitating unit puts into graduated flask 11 gently, makes graduated flask lid 5 cover gently on graduated flask 11 to liquid spill graduated flask 11 influences the test result when preventing the stirring.
B. Slightly improving the suspension stirring device, keeping a distance of about 1cm between a brush 10 at the bottom of the device and the bottom of the measuring cylinder, pressing a switch 2, switching on a power supply, starting to rotate a motor 3 to drive the stirring device to rotate clockwise, dividing the suspension in the measuring cylinder 11 into an inner part and an outer part when looking down, enabling the inner side suspension to move downwards under the action of the force of an inner side stirring blade 8, and enabling the outer side suspension to move upwards under the action of the force of an outer side stirring blade 6. The suspension in the measuring cylinder 11 moves in a circular shape from inside to outside by the action of the inner and outer stirring blades.
C. Simultaneously after pressing switch 2, arm control suspension agitating unit, make 4 lower extreme of main shaft stirring brush 10 from the graduated flask bottom on 1cm position slowly move down, contact bottom soil particle, rinse the stirring through rotatory bottom stirring brush 10 to the clay granule that deposits and adhere to 11 bottoms of graduated flask, the clay granule of scrubbing is along with the suspension intensive mixing of annular up-and-down motion even, along with stirring brush 10 constantly scrubs the graduated flask bottom, thoroughly make the clay granule stirring in graduated flask 11.
D. Observing about 15 seconds, thoroughly rinsing and stirring clay particles at the bottom of the measuring cylinder 11, fully mixing the suspensions, pressing the switch 2, stopping stirring, allowing the whole suspension stirring device to stand still in the suspension of the measuring cylinder for a few seconds, immediately taking out the suspension after the suspension stops moving, starting timing, and preparing a reading (the reading of the hydrometer is carried out according to relevant rules, and the steps are omitted).
E. The suspension stirring device was moved to the next graduated cylinder at the planned time intervals and the above steps were repeated.
The above-described embodiments are merely preferred embodiments of the present invention, and those skilled in the art should also understand that various changes, modifications, additions, and substitutions can be made without departing from the spirit of the present invention.
Claims (7)
1. A stirring device for suspension in a particle analysis test measuring cylinder by a hydrometer method is composed of a device body, and is characterized in that the device body comprises a handle, a switch, a motor, a main shaft and a measuring cylinder cover; a motor is arranged in the handle, the lower part of the handle is movably connected with a main shaft, and the main shaft is connected with the measuring cylinder cover through a hole; the shaft body of the main shaft is connected with a stirring blade group which can enable liquid in the measuring cylinder to flow up and down clockwise through a shaft sleeve, and the end head of the main shaft is connected with a stirring brush.
2. The stirring device for the suspension in the particle analysis test measuring cylinder by hydrometric method according to claim 1, wherein each stirring blade group is composed of an inner layer blade and an outer layer blade, the diameter of the inner stirring blade is 40 mm-50 mm, the outer stirring blade is positioned outside the inner stirring blade, the outer diameter of the outer stirring blade is 45 mm-55 mm, in the suspension of the measuring cylinder, when the inner layer blade rotates clockwise, the liquid is pushed to flow downwards, when the outer layer blade rotates clockwise, the liquid is pushed to flow upwards, a shaft sleeve in the middle of the blade is hollow, the inner diameter of the shaft sleeve is 6 mm-9 mm, the outer diameter of the shaft sleeve is 11 mm-13 mm, the main shaft is connected with the blade through the shaft sleeve in the middle of the blade, and the position is fixed by screwing a screw on the blade shaft.
3. The stirring device for a suspension in a particle analysis test cylinder by hydrometric method according to claim 1, wherein said stirring blade group is provided on the main shaft at least 3 or more groups at equal intervals.
4. The stirring device for a suspension in a particle analysis test cylinder according to claim 1, wherein the stirring blade group is made of a resin material.
5. The stirring device for the suspension in the pycnometry particle analysis test measuring cylinder according to claim 1, wherein the measuring cylinder cover is made of rubber material, and has a large diameter at the upper part and a small diameter at the lower part, the upper part of the measuring cylinder cover is exposed outside the measuring cylinder, the lower part of the measuring cylinder cover can slightly extend into the measuring cylinder, and the middle part is provided with a hole with a diameter slightly larger than that of the main shaft, and the main shaft can freely move up and down through the hole.
6. The stirring device for the suspension in the pycnometry particle analysis test measuring cylinder according to claim 1, wherein the stirring brush is designed in a straight line shape, the length of the stirring brush is 45mm to 55mm, the width of the stirring brush is 10mm to 13mm, a base made of resin material is arranged at one end of the stirring brush, and the base is connected with the main shaft through a screw; the hair is arranged at the bottom of the base, and the shape of the hair is that two sides of the hair incline outwards and the middle hair faces downwards.
7. The stirring device for suspension in a particle analysis test measuring cylinder by hydrometric method according to claim 1, wherein the switch is designed on the handle, the motor is arranged on the lower part of the handle, two No. 1 dry batteries are arranged on the upper part of the motor in the handle to provide power for the motor, and the whole handle is connected with the main shaft through the locking mechanism on the lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922214153.7U CN211963776U (en) | 2019-12-11 | 2019-12-11 | Stirring device for suspension in particle analysis test measuring cylinder by hydrometer method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922214153.7U CN211963776U (en) | 2019-12-11 | 2019-12-11 | Stirring device for suspension in particle analysis test measuring cylinder by hydrometer method |
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| CN211963776U true CN211963776U (en) | 2020-11-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629986A (en) * | 2020-11-25 | 2021-04-09 | 西安建筑科技大学 | Device and method for extracting clay particles |
| CN113713651A (en) * | 2021-09-10 | 2021-11-30 | 绿城农科检测技术有限公司 | Stirrer for controlling stirring speed according to soil particle settlement density |
| CN114018761A (en) * | 2021-11-26 | 2022-02-08 | 重庆壤科农业数据服务有限公司 | Automatic measuring device for soil mechanical composition |
-
2019
- 2019-12-11 CN CN201922214153.7U patent/CN211963776U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629986A (en) * | 2020-11-25 | 2021-04-09 | 西安建筑科技大学 | Device and method for extracting clay particles |
| CN113713651A (en) * | 2021-09-10 | 2021-11-30 | 绿城农科检测技术有限公司 | Stirrer for controlling stirring speed according to soil particle settlement density |
| CN113713651B (en) * | 2021-09-10 | 2023-01-31 | 绿城农科检测技术有限公司 | Stirrer for controlling stirring speed according to soil particle settlement density |
| CN114018761A (en) * | 2021-11-26 | 2022-02-08 | 重庆壤科农业数据服务有限公司 | Automatic measuring device for soil mechanical composition |
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Address after: No.239 Yingkou Road, Heping District, Tianjin 300052 Patentee after: Tianjin municipal engineering design and Research Institute Co.,Ltd. Address before: No.239 Yingkou Road, Heping District, Tianjin 300052 Patentee before: TIANJIN MUNICIPAL ENGINEERING DESIGN & Research Institute |