CN201413114Y - Dune sand rest angle fast tester device - Google Patents
Dune sand rest angle fast tester device Download PDFInfo
- Publication number
- CN201413114Y CN201413114Y CN2009201588049U CN200920158804U CN201413114Y CN 201413114 Y CN201413114 Y CN 201413114Y CN 2009201588049 U CN2009201588049 U CN 2009201588049U CN 200920158804 U CN200920158804 U CN 200920158804U CN 201413114 Y CN201413114 Y CN 201413114Y
- Authority
- CN
- China
- Prior art keywords
- funnel
- base
- dune
- probe
- horizon bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a dune sand rest angle fast tester device which is characterized in that four base leveling screws are installed under a base; a level indication device, a testing disc containing a probe, a plane mirror containing scales, a funnel on the left of the support bar, an aperture adjusting knob under the funnel and a funnel height adjusting screw on the right of the supportbar are arranged on the base; the height adjusting screw can continuously adjust the funnel height; the aperture adjusting knob can adjust the size of the funnel aperture; the diameter sizes on the upper and lower end faces of the testing disc are fixed; the probe is located at the right edge of the disc bottom circle; the dune height above the upper end face of the probe buried in the disc is acquired by means of a three-point superposition calibration method in which the three points are the intersection point of the probe and the dune surface, its image in the plane mirror and the scale onthe plane mirror; then the rest angle size of the dune is calculated by means of the triangle similarity theory. The utility model improves the conventional dune sand rest angle testing method, reduces the test error, decreases the test working load and increases the test precision and the observation speed.
Description
Technical field
The utility model relates to the instrument that uses on a kind of teaching and scientific research, is a kind of dune sand angle of repose high speed tester device specifically.
Background technology
At present, people mainly are to utilize falling bodies to become the method (ballistic method) of awl to the test at dune sand angle of repose.Normally in test process, dune sand to be measured freely fallen with certain height through even blanking device and on square paper, be piled into awl, repeatedly measure the bottom surface diameter, try to achieve the mean value R of its radius, record its vertex of a cone height H again, calculate atan (H/R), through test of many times, obtain the mean value of same falling bodies atan (H/R), be the angle of repose of this kind dune sand.
And in the measuring process at actual dune sand angle of repose, we observe, owing to being subjected to the momentum effect meeting that self gravitation produces, the grains of sand impact established top of sand dune, cause the sand dune vertex of a cone can produce the phenomenon of peak clipping, equally, because the inertia effect of grains of sand downslide process can cause the non-tiltedly straight phenomenon on base, sand dune, so the sand dune that finally causes forming is not desirable cone shape, its roughly section can represent with Fig. 1.
If according to the definition at quasistatic angle of repose, then need do certain correction to measuring average.Its relational expression is as follows:
In the formula,
The tangent value of representing actual angle of repose; H represents to pile up the apparent height of circular cone; L represents to pile up the apparent radius of circular cone; γ represents the height tolerance that ballistic method causes; λ represents the radius deviation that inertia effect causes;
Expression actual measurement tangent value.
By (1) formula as can be known, under conventional determining method, because in the banking process on sand dune, general γ and λ do not change with the variation of l, so actual mensuration numerical value is not equal to the angle of repose numerical value of definition, and less than the angle of repose numerical value that defines.
This shows, in the experimental test process at angle of repose, not only when bottom surface radius R and height H are measured, need repeatedly measure and the workload that seems is big, and the circle that awl bottom surface, sand dune might not formation rule, the bottom surface radius R is measured and is had great error.
Simultaneously the sand dune is in becoming the awl process, because grit has caused the peak clipping phenomenon of top of sand dune to the impact of the sand dune vertex of a cone, the awl point can present bald phenomenon, and the sand dune vertex of a cone height H that test obtains is less than the actual cone height of this awl; The non-tiltedly straight phenomenon in the base that the inertia effect of grit downslide process causes causes that the measured value of bottom surface, sand dune radius R is bigger than normal.And the measuring accuracy at dune sand angle of repose determines jointly that by the measuring accuracy of bottom surface radius R vertex of a cone height H therefore, in the test process at different dune sands angle of repose, test error difference will be occupied very big proportion in total variances.
Summary of the invention
In view of above-mentioned, the purpose of this utility model is to provide a kind of dune sand angle of repose high speed tester device.Utilize this device can eliminate the measuring error of bottom surface radius and vertex of a cone height; Improve the observation speed of bottom surface radius and vertex of a cone height, thereby realize quick test the angle of repose, sand dune.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of dune sand angle of repose high speed tester device, by base, test plate, contain scale level crossing, probe, small opening adjusting knob, funnel, leveling serew, level indication bubble, support bar, down horizon bar, go up horizon bar, screw rod and sea whelk and form.Leveling serew is installed in the base below, and horizontal indicator bubble places the base top, and test plate is provided with the base center, and probe is vertically fixed on the beneath end face edge place of test plate; The rear part edge place of level crossing vertical fixing base, the rear part edge place of level crossing vertical fixing base, the scale axis on it is parallel to sideline, the base left and right sides in the formed face of probe; The support bar uplink is connected to down horizon bar and last horizon bar, and following horizon bar links to each other with funnel and screw rod, and the left end boring that links to each other can make down horizon bar slide up and down with respect to support bar; Right boring contains screw thread, links to each other with the screw rod that contains screw thread; Last horizon bar left end is fixed on the support bar, and right-hand member boring links to each other with screw rod, and screw rod is fixed with sea whelk with the position that combines of last horizon bar, and the center of circle of funnel is vertical with base with the center line in the center of circle of test plate, and the small opening adjusting knob places the funnel below.
Above-mentioned test plate upper port diameter is R, and the bottom surface diameter is R/2.
The axis of above-mentioned level crossing high scale is contour with probe and parallel, and the zero graduation of its rule and test plate are suitable for reading etc. flat.
The center of circle of above-mentioned funnel is vertical with base with the center line in the center of circle of test plate.
The utility model compared with prior art has the following advantages and the beneficial effect that produces is:
1, shown in Fig. 1-2, the sand dune is in becoming the awl process, because grit has caused the peak clipping phenomenon of top of sand dune to the impact of the sand dune vertex of a cone, the awl point can present bald phenomenon, be positioned at disk central authorities as the tester probe, probe is nuzzled the height h on sand dune less than the high H of actual cone of this awl, so the calculated value at angle of repose, sand dune is less than normal.And in this device, for eliminating this error, probe placed depart from the test plate center radially apart from circumferential edges R/2 place (Fig. 3), because probe diameter (d=1mm) is very little, probe is to the mobile no delay effect of sand bed, according to Similar Principle of Triangle, the available formula of interior angle (angle of repose) that this cone and bottom surface are constituted
Calculate, therefore, successfully eliminated the existence of this error, wherein H
0For radially apart from the height on sand dune, circumferential edges R/2 place.
2, equally shown in Fig. 1-2, the non-tiltedly straight phenomenon in the base that the inertia effect of grit downslide process can cause, cause the measured value of bottom surface, sand dune radius R bigger than normal, and this proving installation bottom is used for accepting the normal diameter test plate of husky sample and has avoided the non-tiltedly straight phenomenon in base, sand dune that produces because of inertia effect, the unnecessary error that the hand dipping of also having avoided simultaneously the sand dune to bore end radius causes is measured defective for second that has overcome classic method.Too small when the test plate diameter, husky amount is few on the dish, and the inhomogeneous and contingency of factors such as husky particle diameter, character of surface is bigger to the influence that integral body causes, and the standard deviation at the angle of repose of surveying and the coefficient of variation are also just big, and measuring accuracy is low; Disk diameter is excessive, and the amount of flow of unnecessary sand is big, causes bigger drive layer at poppet surface, then can cause test result bigger variation to occur, therefore, by test, the upper and lower end face diameter of the utility model test plate is fixed, and is advisable to select test plate upper surface diameter 15cm.
Secondly the screw rod of heightening on support bar right side is being fixed with sea whelk with the position that combines of last horizon bar, keeps its stationkeeping in vertical direction constant, but does not lose the ability that it rotates freely; The following horizon bar that is connected with the funnel right side contains two borings, and left side boring can move up and down with support bar, and the right boring includes screw thread, moves up and down along with horizon bar under the rotation of screw rod can drive funnel, to change the height of funnel.
3, press the definition at angle of repose, in actual mechanical process the angle of repose of surveying should be the angle of repose that the quasistatic heap-shaped becomes, therefore, the shock height of the grains of sand and flow velocity all can impact survey dune sand angle of repose size, the funnel aperture adjusting knob of this device is used for controlling the flow velocity of the grains of sand specially, the funnel height is heightened the shock height that height that screw rod is used for controlling funnel is specially controlled the grains of sand, therefore, this device can be avoided the error that the flow velocity because of the height of funnel and the grains of sand causes fully.
Description of drawings
Fig. 1 sand dune diagrammatic cross-section.
Fig. 2 bores on the sand dune high synoptic diagram.
Fig. 3 probe rational position synoptic diagram.
Fig. 4 is a structural representation of the present utility model.
Among the figure, the 1st, base, the 2nd, test plate, the 3rd, contain the scale level crossing, the 4th, probe, the 5th, small opening adjusting knob, the 6th, funnel, the 7th, leveling serew, the 8th, level indication bubble, the 9th, support bar, the 10th, following horizon bar, the 11st, last horizon bar, the 12nd, screw rod, the 13rd, sea whelk.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 4, a kind of dune sand angle of repose device for quick testing, by base 1, test plate 2, contain scale level crossing 3, probe 4, small opening adjusting knob 5, funnel 6, leveling serew 7, level indication bubble 8, support bar 9, down horizon bar 10, go up horizon bar 11, screw rod 12 and sea whelk 13 and form.Four leveling serews 7 are installed in base 1 below, and horizontal indicator bubble 8 places base 1 top, and test plate 2 is provided with base 1 center.Test plate 2 upper port diameters are 15cm, and the lower surface diameter is 7.5cm, and probe 4 places the beneath end face edge place of test plate; Level crossing 3 is vertically fixed on the upper surface edge of base, and the axis of level crossing 3 high scales is parallel to described base right hand edge line with probe 4 equal altitudes and both formed faces, and meter full scale is generally 7-12cm; Support bar 9 uplinks are connected to down horizon bar 10 and last horizon bar 11, and following horizon bar 10 links to each other with screw rod 12 with funnel 6, and the left end boring that links to each other can make down horizon bar 10 slide up and down with respect to support bar 9; Right boring contains screw thread, links to each other with the screw rod 12 that contains screw thread; Last horizon bar 11 left ends are fixed on the support bar 9, and right-hand member links to each other with screw rod 12 with boring, and screw rod 12 can rotate with respect to last horizon bar 11, and screw rod 12 is fixing with sea whelk 13 with the position that combines of last horizon bar 11.The center of circle of funnel 6 is vertical with base 1 with the center line in the center of circle of test plate 2, and small opening adjusting knob 5 places funnel 6 belows, reaches the flow of regulating the funnel grains of sand by regulating the funnel aperture.
During test, the husky sample that at first will choose is put into conical hopper 6, and small opening adjusting knob 5 is closed condition at this moment, keeps funnel 6 lower prongs from about disk 1cm; The adjusting knob 5 of slowly regulating funnel 6 lower ends then can just flow out the grains of sand, stops adjusting knob 5 immediately, so that flow out grains of sand flow velocity unanimity; Along with increasing of the sand dune vertex of a cone, with slow with one's hands slow rotary screw 12, regulate the height of funnel 6, funnel 6 lower ends are remained from about the vertex of a cone height 1cm of sand dune, so that the grains of sand are consistent to the shock height of the sand dune vertex of a cone; So, allow the grains of sand that funnel 6 flows out be injected in the test plate 2 of a certain limited fixed diameter in the heart, till the grains of sand of grains of sand accumulation horizon hypotenuse flow out automatically along edge, test plate 2 upper surface, stopping the grains of sand injecting, the intersection point that utilizes probe 4 and surface, sand dune then with and obtain the nuzzle height H o on above sand dune, test plate 2 upper surfaces of probe 4 in the picture of 3 li of level crossings and 3 coincidence correction methods of the scale on the level crossing 3, calculate the angle of repose according to the definition at Similar Principle of Triangle and angle of repose at last:
In the formula,
Be the angle of repose, sand dune; H is the probe reading, cm; R is the bottom surface radius, cm.
Claims (3)
1, a kind of dune sand angle of repose high speed tester device, be by base (1), test plate (2), contain scale level crossing (3), probe (4), small opening adjusting knob (5), funnel (6), leveling serew (7), level indication bubble (8), support bar (9), following horizon bar (10), last horizon bar (11), screw rod (12) and sea whelk (13) are formed, it is characterized in that leveling serew (7) is installed in base (1) below, horizontal indicator bubble (8) places base (1) top, test plate (2) is provided with base (1) center, and probe (4) is vertically fixed on the beneath end face edge place of test plate; The rear part edge place of level crossing (3) vertical fixing base (1), scale axis on it and the formed face of probe (4) are parallel to sideline, the base left and right sides, support bar (9) uplink is connected to down horizon bar (10) and last horizon bar (11), following horizon bar (10) links to each other with funnel (6) and screw rod (12), and the left end boring that links to each other can make down horizon bar (10) slide up and down with respect to support bar (9); Right boring contains screw thread, links to each other with the screw rod that contains screw thread (12); Last horizon bar (11) left end is fixed on the support bar (9), and right-hand member boring links to each other with screw rod (12), and screw rod (12) is fixing with sea whelk (13) with the position that combines of last horizon bar (11); The center of circle of funnel (6) is vertical with base with the center line in the center of circle of test plate (2), and small opening adjusting knob (5) places funnel (6) below.
2, a kind of dune sand according to claim 1 angle of repose high speed tester device, it is characterized in that: above-mentioned test plate (2) upper port diameter is R, and the bottom surface diameter is R/2.
3, a kind of dune sand according to claim 1 angle of repose high speed tester device, it is characterized in that: the axis of above-mentioned level crossing (3) high scale is contour and parallel with probe (4), and the zero graduation of its rule and test plate (2) are suitable for reading etc. flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201588049U CN201413114Y (en) | 2009-05-27 | 2009-05-27 | Dune sand rest angle fast tester device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201588049U CN201413114Y (en) | 2009-05-27 | 2009-05-27 | Dune sand rest angle fast tester device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201413114Y true CN201413114Y (en) | 2010-02-24 |
Family
ID=41714997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201588049U Expired - Fee Related CN201413114Y (en) | 2009-05-27 | 2009-05-27 | Dune sand rest angle fast tester device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201413114Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288095A (en) * | 2011-05-13 | 2011-12-21 | 北京航空航天大学 | Box type measurement device for slide angle of scattered material and measurement method thereof |
| CN102445403A (en) * | 2010-10-11 | 2012-05-09 | 山东方明药业股份有限公司 | Repose angle gauge |
| CN102841037A (en) * | 2012-09-10 | 2012-12-26 | 重庆交通大学 | Method and device for testing steady repose angle of wide grading loose accumulation soil body |
| CN103913111A (en) * | 2014-03-13 | 2014-07-09 | 河海大学 | Fine-particle sediment underwater repose angle measuring device and measuring method thereof |
| CN108120668A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | The seam coefficient of internal friction test device and test method of a kind of proppant |
| CN109655887A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | The method and system of sand dune bottom faces elevation are calculated using desert earth's surface altitude data |
| CN109781585A (en) * | 2019-03-22 | 2019-05-21 | 安徽省引江济淮集团有限公司 | A kind of no-Co-alloy steel Repose angle gauge |
-
2009
- 2009-05-27 CN CN2009201588049U patent/CN201413114Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445403A (en) * | 2010-10-11 | 2012-05-09 | 山东方明药业股份有限公司 | Repose angle gauge |
| CN102288095A (en) * | 2011-05-13 | 2011-12-21 | 北京航空航天大学 | Box type measurement device for slide angle of scattered material and measurement method thereof |
| CN102841037A (en) * | 2012-09-10 | 2012-12-26 | 重庆交通大学 | Method and device for testing steady repose angle of wide grading loose accumulation soil body |
| CN103913111A (en) * | 2014-03-13 | 2014-07-09 | 河海大学 | Fine-particle sediment underwater repose angle measuring device and measuring method thereof |
| CN108120668A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | The seam coefficient of internal friction test device and test method of a kind of proppant |
| CN109655887A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | The method and system of sand dune bottom faces elevation are calculated using desert earth's surface altitude data |
| CN109781585A (en) * | 2019-03-22 | 2019-05-21 | 安徽省引江济淮集团有限公司 | A kind of no-Co-alloy steel Repose angle gauge |
| CN109781585B (en) * | 2019-03-22 | 2023-11-24 | 安徽省引江济淮集团有限公司 | Non-cohesive soil repose angle tester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201413114Y (en) | Dune sand rest angle fast tester device | |
| CN102331489B (en) | System for testing physical model for large-scale landslides under action of multiple factors | |
| CN101008565A (en) | Instrument for measuring 3D deformation of engineering geologic fissure | |
| CN206292026U (en) | A kind of falling ball impact test machine | |
| CN110146362B (en) | Device and method for preparing true triaxial rock-soil test piece with different fracture geometric parameters | |
| CN202119509U (en) | Liquidometer suitable for underground pond with large area | |
| CN101806669B (en) | Testing system of high-precision still water buoyancy model with underground structure | |
| CN202814314U (en) | Repose angle tester | |
| CN200982850Y (en) | Square measuring rule for bearing | |
| CN203588527U (en) | Sensing momentum theorem experimental apparatus | |
| CN109341931B (en) | Improved hydrostatic pressure testing experimental device and testing method | |
| CN207439392U (en) | A kind of project cost dosage measurement ruler | |
| CN109826250A (en) | A kind of foundation bearing force checking device and method | |
| KR102471781B1 (en) | Automatic measuring device for settling velocity of non-cohesive particle mixtures | |
| CN101799288A (en) | Exquisite geological clinometer | |
| CN206179340U (en) | Three string pendulums with pivot angle indicating device | |
| CN210163876U (en) | Device for rapidly detecting compaction degree of road filling foundation | |
| CN107464480A (en) | A kind of new flat parabolic experimental apparatus for demonstrating | |
| CN209207452U (en) | The big component mounting tool of locomotive | |
| CN203132953U (en) | Instrument for determining repose angle of non-suspended solid particles in two-phase fluid under pressure state | |
| CN204066525U (en) | Dynamic wide-angle static friction tester | |
| CN206353023U (en) | A kind of measurement apparatus for being used to measure flat-type building materials thickness | |
| CN207662760U (en) | Offshore anti-liquefying ability in-situ measurement device | |
| CN105135982A (en) | Track panel height difference measuring device | |
| CN201083487Y (en) | Sand soil static repose angle determinator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20110527 |