CN102680359A

CN102680359A - Repose angle measuring instrument

Info

Publication number: CN102680359A
Application number: CN2011100649579A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-17
Filing date: 2011-03-17
Publication date: 2012-09-19

Abstract

The invention discloses a repose angle measuring instrument, which is characterized by comprising a horizontal base, a powder overflowing box arranged on the base, a circular horizontal boss arranged in the powder overflowing box, a vertical bar perpendicularly connected with the base, a cross bar which is connected with the vertical bar in a sliding mode and a hopper fixed on the cross bar, wherein the vertical projection of the hopper opening is coincident with the center of the circular horizontal boss; scale values which are used for reading the size of the repose angle are marked on the vertical bar; a vertical rack is fixed on the vertical bar; and a roller matched with the rack is fixed on the cross bar, so that the cross bar and the hopper can be driven to move up and down along the vertical bar when the roller is rotated. The repose angle measuring instrument has the advantages that the radius of a cone formed by accumulated powder is fixed, the size of the repose angle can be correspondingly read through height, and measurement and calculation are not required, so that the measuring instrument is conveniently used, high in accuracy and good in repeatability; and the measuring instrument is simple in structure, easily operated and low in cost and has relatively large promoting value.

Description

The angle of repose measuring instrument

Technical field

The present invention relates to a kind of surveying instrument of measuring particle, powder fluidity, particularly angle of repose measuring instrument.

Background technology

The angle of repose is meant the Free Surface of powder accumulation horizon under the static equilibrium state, with the maximum angle of surface level formation.Angle of repose, angle of repose etc. are also claimed in the angle of repose.The angle of repose is bigger to the flowability affects of powder, and the angle of repose is more little, and the flowability of powder is good more.

The assay method at angle of repose has injection method, discharge method, container lean method.Using more injection method is that sample is poured in the bucket; Making sample drop on the below radius through funnel is on the round flat board of r; Powder is piled up gradually, till can not continuing to pile height, with measuring powder stack height h on the rule; The tangent value at angle of repose equals the height of cone and the ratio of cone bottom surface radius, so can extrapolate the number of degrees at angle of repose.The shortcoming of this measuring method is: diameter, highly be difficult to measure accurately, error is big, poor reproducibility.All need build measurement mechanism again at every turn, also will measure behind diameter, the height and calculate again, waste time and energy, very trouble.

In addition, the equipment that some measure angles of repose is disclosed in the patented technology, but direct reading.

Summary of the invention

The objective of the invention is: a kind of easy to operate, accurate, the direct reading angle of repose of measurement measuring instrument is provided.

The technical scheme that the present invention adopted is: a kind of angle of repose measuring instrument is characterized in that: comprise horizontal base, be arranged at the excessive powder box on the base and be put in circular horizontal ledge in the powder box that overflows, the cross bar that is slidingly connected with base montant connected vertically, with montant, be fixed in the funnel on the cross bar; Said lural vertical projection overlaps with the center of circle of said circular horizontal ledge, also is marked with the scale value that is used to read the angle of repose size on the said montant.

Be fixed with vertical tooth bar on the said montant, be fixed with the roller that cooperates with tooth bar on the said cross bar, so that when rotation roller, can drive cross bar and funnel moves up and down along montant.

After adopting said structure, can use by following method:

1., rotation roller, funnel is reduced to circular horizontal ledge top.

2., in funnel, add an amount of particle or powder; Along the column travelling carriage that slowly moves up, particle or powder constantly flow out from bell mouth, on circular horizontal ledge, constantly are piled into taper shape; Shape constantly increases; When treating that this cone floorage just equals the area of circular horizontal ledge, unnecessary particle or powder will drop down onto in the powder box that overflows, and this moment, the profile of cone tended towards stability.

3., flow stop 2 minutes after, rotation roller, make when bell mouth has just touched the top of cone till, the column that just exposes from the travelling carriage below is read the size at angle of repose.

Reason is: can be known by trigonometric function; The tangent value at angle of repose equals the height of cone and the ratio of cone bottom surface radius; And the facies basialis pyramidis radius equals the radius of circular horizontal ledge is steady state value; So the size at angle of repose is corresponding one by one with the height of piling up cone, mark corresponding scale value at column, can directly read the size at angle of repose.

The invention has the beneficial effects as follows: constant radius, read the angle of repose size by correspondence highly, need not to measure and calculate, easy to use, accuracy is high, favorable reproducibility; Also have simple in structure, easy operating, advantage with low cost, bigger promotional value is arranged.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Among the figure: 1 base, 2 excessive powder boxes, 3 circular horizontal ledge, 4 montants, 5 scale values, 6 travelling carriages, 7 rollers, 8 tooth bars, 9 cross bars, 10 funnels, 11 bracing rings, 12 bell mouths.

Embodiment

As shown in Figure 2; The top of horizontal base 1 is placed with the powder box 2 that overflows; Be placed with circular horizontal ledge 3 in the excessive powder box 2; Horizontal base 1 vertically is connected with montant 4, montant 4 is fixed with vertical tooth bar 8, to be fixed with cross bar 9 through being connected on travelling carriage 6, the travelling carriage 6 with roller 7 that tooth bar 8 matches, is fixed with funnel 10 through bracing ring 11 on the cross bar 9.When rotation roller 7, can drive cross bar 9 and funnel 10 moves up and down along montant 4.

The constant bearing that the length of cross bar 9 reaches with respect to montant should be suitable, so that lural vertical projection keeps overlapping with the center of circle of above-mentioned circular horizontal ledge all the time.

Overflow powder box 2 to clear up the powder in it because of after measurement, needing to take out; When guaranteeing that measure next time; The center of circle of circular horizontal ledge 3 just is positioned on the lural vertical line: should be provided with the position mark of placing the powder box that overflows on the horizontal base 1; Also should be provided with the position mark of placing circular horizontal ledge in the excessive powder box 2, being convenient to circular horizontal ledge 3 can repeatedly repeat and be positioned over easily on the same position of base 1.

As preferred example; Overflow powder box 2, circular horizontal ledge 3 is made by transparent material; The center of excessive powder box 2, the home position of circular horizontal ledge 3 all should be provided with station location marker (like cross curve), and the correspondence position of horizontal base 1 also is provided with station location marker line (drawing among the figure).

Also be marked with the scale value 5 that is used to read the angle of repose size on the montant 4; In general measurement mechanism; The pointer that should have the indication reading to use, in this application, the lower bottom part that travelling carriage 6 can be set is equal with bell mouth 12; Can arrange: the scale value 5 that travelling carriage 6 lower bottom parts are corresponding is the angle of repose, so can save pointer.

Claims

1. angle of repose measuring instrument is characterized in that: comprise horizontal base, be arranged at the excessive powder box on the base and be put in circular horizontal ledge in the powder box that overflows, the cross bar that is slidingly connected with base montant connected vertically, with montant, be fixed in the funnel on the cross bar; Said lural vertical projection overlaps with the center of circle of said circular horizontal ledge; Also be marked with the scale value that is used to read the angle of repose size on the said montant.

2. angle of repose as claimed in claim 1 measuring instrument; It is characterized in that: the mode of being slidingly connected of said cross bar and montant is: be fixed with vertical tooth bar on the said montant; The roller corresponding with tooth bar is fixed on the travelling carriage; Move up and down along montant so that the rotation of roller can drive travelling carriage, said cross bar is fixed on the travelling carriage.

3. angle of repose as claimed in claim 2 measuring instrument; It is characterized in that: said excessive powder box, and said circular horizontal ledge be made by transparent material, be provided with the station location marker line on the correspondence position of the center of said excessive powder box, the home position of said circular horizontal ledge and said horizontal base.