CN1086013A

CN1086013A - Sedimentation balance

Info

Publication number: CN1086013A
Application number: CN 93103135
Authority: CN
Inventors: 连嗣南
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-16
Filing date: 1993-03-16
Publication date: 1994-04-27

Abstract

A sedimentation balance is characterized in that a sedimentation weight-adding frame is changed at a weight-adding position of an optical analysis balance, a sedimentation receiver consisting of a sedimentation cylinder and a sedimentation disc is arranged below a damping box at the left end of a beam, and the balance is specially used for testing the particle size and the distribution condition of powder. The sedimentation balance is simple in structure, high in accuracy and convenient to operate, 12-18 samples can be tested by each person every day, the electricity and the samples are saved, the sedimentation balance is safe and reliable, no dust pollution is caused, and the sedimentation balance is suitable for industrial conventional testing of 5-1200 mu m particle size powder and scientific research.

Description

A kind of sedimentation balance

The present invention is a kind of balance, is applicable to the settled weight method to measure powder granularity and distribution thereof.

Existing sedimentation balance, as Gallenkamp sedimentation balance, Shimaelzu sedimentation balance etc., all be to start with electromagnetism, automatically the raise the price principle of balance granules sedimentation, the amount of space of at every turn raising the price is constant, cause in the fine fraction fractional error bigger, dispersion particle concentration big (1～5%), complicated operation, easy break-down.These sedimentation balances only are fit to measure the usefulness of following granulometric range of 100 μ m and laboratory study, are not suitable for industrial conventional routine test work.To all using sieve formula greater than the polydispersion body more than the 100 μ m.Various disadvantages such as and there is the size of mesh mutability in sieve formula, and it is low to measure precision, and labour intensity is big, and power consumption consumption sample is many, and static adheres to, and technology unsafe factor and dust infringement operating personnel are healthy are very limited its use.Quite a few industrial powder granularity upper limit is arranged at present more than 500 microns, existing sedimentation balance and sieve formula all can't accurately be measured.

The purpose of this invention is to provide a kind of sedimentation balance, can measure 5～1200 μ m powder granularity size and distribution situations thereof, and have easy to operately, the degree of accuracy height is suitable for using in the conventional and scientific research of industry.

The present invention takes following measure to achieve the above object: on the shell of double plate optical analysis balance, the former frame place that raises the price is re-established as a sedimentation of being made up of main cam group and the auxiliary cam group frame of raising the price.Its main cam group is to be made of 5 different cams of tip edge tooth paddy phase place, and the outer fixed axis gear of it and 12 teeth is fixed on the outer dead axle; The auxiliary cam group is to be made of 3 different cams of tip edge tooth paddy phase place, in the interior fixed axis gear of it and 6 teeth is fixed on the dead axle; Be provided with one by settlement barrel and the sedimentation receiver that places the sedimentation dish settlement barrel in to form below crossbeam A end damping box, the sedimentation dish hangs over crossbeam A and holds on the hook that links to each other.

The present invention has simple in structure, and is easy to operate, and economize on electricity economizes sample, and measurement range is wide, the degree of accuracy height, and relative error is suitable for test each granule size of powder and distribution situation thereof in industry routine and the scientific research less than ± 1.5%.

The invention will be further described below in conjunction with accompanying drawing.

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

Fig. 2 is the C-C view of Fig. 1;

Fig. 3 is 5 cam diagrams of main cam group;

Fig. 4 is 3 cam diagrams of auxiliary cam group.

Embodiment:

Change the double plate optical analysis balance frame of raising the price into the sedimentation frame 5 of raising the price, its main cam group 14 is made up of 5 different cams 18,19,20,21,22 of the shared phase place of tip edge tooth paddy.Main cam group 14 is fixed on the outer dead axle 13, as Fig. 2, shown in Figure 3 with the outer fixed axis gear 12 with 12 teeth.Outer fixed axis gear 12 is divided into 12 class (phase place) with main cam group 14 and controls, and these 12 class are divided into again: first section is 1～5 class, and every class adds circle sign indicating number 200mg; Second section is 6～11 class, and every class adds circle sign indicating number 100mg; The 12nd class is 0 grade.Main cam group 14 accent yardage values and program listing are as follows:

Annotate: "+"-add this to enclose sign indicating number; "-"-do not add this circle sign indicating number.

The raise the price auxiliary cam group 16 of frame 5 of sedimentation is made up of 3 different cams 23,24,25 of the shared phase place of tip edge tooth paddy.Auxiliary cam group 16 is fixed on the interior dead axle 15, as Fig. 2, shown in Figure 4 with the interior fixed axis gear 17 with 6 teeth.Interior fixed axis gear 17 is divided into 6 class (phase place) with auxiliary cam group 16 and controls, the 1st～5 class is the 3rd section, be that examination adds circle sign indicating number section, bear the circle sign indicating number of transferring the 10mg level, i.e. examination earlier adds circle code value and high-grade siderosphere sign indicating number, long as the settling time, change examination again and add circle code value and low-grade light circle sign indicating number, for example every class circle code value is 80mg, 50mg, 30mg, 20mg, 10mg.Auxiliary cam group 16 accent yardage values and program listing are as follows:

Hold for adding the circle sign indicating number at the B of the crossbeam 7 of double plate optical analysis balance end.Be provided with a sedimentation receiver below A end damping box 9, it is by transparent or semitransparent settlement barrel 10 and places the sedimentation dish 11 in it to constitute.Settlement barrel 10 is that the oil resistance polyester is made, and sedimentation dish 11 is that by brass rod is fixed on brass disk center and forms.The other end of brass rod can be connected with the hook that crossbeam 7A end links to each other by nylon wire.The sedimentation receiver is arranged on below the shell 1, promptly on the base plate under the damping box 9 hole is arranged, and is connected by this hole by nylon wire.The sedimentation receiver also can be arranged in the shell 1, and this can decide as required.Below crossbeam 7B end damping box 9, a balance weight body 4 that hangs over crossbeam 7B end can be set, make it play equilibrium activity.The limit pendulum device 3 of a pointer 2 can be set, as the hunting range of limit pointer 2 on pillar 8.

Test operating procedure: in settlement barrel 10, inject the sedimentation medium, put positive sedimentation receiver, hang up sedimentation dish 11, make the pointer 2 of sedimentation balance reach zero balance, close balance then, add 200mg circle sign indicating number 6 in advance.Take by weighing 5 gram samples, add in the settlement barrel 10, be stirred to when even with sedimentation dish 11, hang up sedimentation dish 11 immediately, and open a day gentle operate the game match simultaneously, when particles settling amount balance 200mg circle sign indicating number 6 just, be pointer 2 when pointing to zero point, record the time, add circle sign indicating number 6 for the second time again, repeat previous action, till reaching required total settlement time.Circle code value and the settling time that add according to each accumulative total made curve map, and the line data of going forward side by side is handled, and just can determine the weight percentage of powder granularity and each grade.Such sedimentation balance can be tested 12～18 samples for each person every day.

Claims

1, a kind of sedimentation balance, comprise shell [1], pillar [8], crossbeam [7], damping box [9], pointer [2], circle sign indicating number [6], the frame of raising the price, the invention is characterized in that the described frame of raising the price is the sedimentation frame [5] of raising the price, its main cam group [14] is to be made of 5 cams [18,19,20,21,22], the outer fixed axis gear [12] of it and 12 teeth is fixed on the outer dead axle [13], auxiliary cam group [16] is to be made of 3 cams [23,24,25], and the interior fixed axis gear [17] of it and 6 teeth is fixed on the interior dead axle [15]; Below described crossbeam [7] A end damping box [9], be provided with one by settlement barrel [10] and the sedimentation receiver that places the sedimentation dish [11] in it to form, sedimentation dish [11] hangs over crossbeam [7] A and holds on the hook that links to each other.

2, sedimentation balance according to claim 1 is characterized in that below described crossbeam (7) the B end damping box (9) balance weight body (4) being set.

3, sedimentation balance according to claim 1 and 2 is characterized in that can being provided with on the described pillar (8) the limit pendulum device (3) of a pointer (2).

4, sedimentation balance according to claim 1 and 2 is characterized in that described sedimentation receiver also can be arranged in the shell (1).

5, sedimentation balance according to claim 3 is characterized in that described sedimentation receiver also can be arranged in the shell (1).