wqs vibrating screen

WQS VIBRATING SCREEN
OPERATING INSTRUCTION
Please read through these operating instruction before using
CONTENTS
I.
Application……………………………………………………….2
II.
Special environmental consideration…………………………….2
III.
Specifications…………………………………………………….3
IV.
Principle and Structure…………………………………………...3
V.
Operation…………………………………………………………6
VI.
Common Breakdown and Handling……………………………...7
VII. Maintenance……………………………………………………...7
I.
Application
Vibrating Screen WQS is an up-to date laboratory automatic screen
designed and developed by our factory, applied to particle analysis in the
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fields of pharmacy, metallurgy, foods, cosmetics and grain, and
characterized by convenient operation, no rotary component, and
electronic controlled amplitude and frequency. Its performance index is
equal to that of the vibrator with sieve manufactured by German
FRITSCH. In comparison with the traditional manual screen, it can
greatly reduce labor intensity of operators and raise working efficiency. It
is an essential laboratory screen for particle analysis.
II.
Special environmental consideration
a) The normal operating environment for vibrating screen should be
kept within 5-35℃.
b) The ground connection of vibrating screen should be reliable.
c) Keep
away
from
the
interference
sources
of
strong
electromagnetic field.
III.
Specifications
a) Operating range: ≤325 mesh
b) Vibration frequency: 3000 times / min, 6000 times / min
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c) Amplitude selection: 0-3 mm, continuous adjustment
d) Vibration mode: 1 fine vibration
2 intermittent vibration
3 continuation vibration
e) Weight: 20kg
f) Power supply: AC 220V±22V, 50HZ±1HZ
IV.
Principle and Structure
It is easy to operate for adopting advanced integrated circuit control. The
functional block diagram of the instrument is shown in Figure 1 and the
structure in Figure 2.
The main part of the vibrating screen is an electronic controlled
electromagnet, on which there is a vibrating plate for mounting screens (8
at most, 50 mm high each). The electronic controlled electromagnet
transfers to the vibrating plate a vibration of 3000 times / min (50 HZ) or
6000 times / min (100 HZ). On the vibrating plate install the screens,
sieve-tray and screen head. The amplitude of the sieve-plate tower can be
changed from 0 to 3 mm by means of the electronic controller. The
screening time can be adjusted from 3 to 6 min by a timer.
Screen mesh
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Electromagnet
Vibrating screen
Silicon control
Power supply
Integrated unit flip-flop
Electronic timer
timer
Figure 1
There are three controllers: “Fine”, “Intermittent”, and “Continuation”.
“Fine”: the vibrating screen vibrates in a low amplitude at a frequency of
6000 times / min (100 HZ). This operating mode is applied to the analysis
of fine screening (especially for wet screening).
“Intermittent”: the vibration screen vibrates as the required amplitude at a
frequency of 3000 times / min (50 HZ). The vibration period of the
sieve-plate tower can be set from 3 to 10 sec by a potentiometer. The
stopping time is about 1.5 sec, preventing the resonance between the
screen mesh and material and shortening the sieving time.
“Continuation”: the working of vibrating screen is as above, but no
stopping. This operating mode is mainly applied to the materials that are
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easy to be sieved (the fine substances contained are not too many).
In case of the sieving particles greater than 200 mesh, place screening-aid
balls on the screens, each of which can use 10 agate balls of 10 mm in
diameter each, or 5 rubber balls of 20 mm in diameter each, preventing
from blocking the screen meshes.
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7
9
10
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1
5
2
4
3
Figure 2
1— Timer panel;
3— Intermittent knob;
2— Amplitude-modulated knob;
4— Function knob;
5— Sieve-tray;
6— Standard screen;
7— Screen head;
8— Lock nut;
9— Tension belt;
10— Spanner
V.
Operation
1. Before using the vibrating screen, ascertain what is the specifications
of the screen and how many screens to be used according to the
materials to be sieved by the user.
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2. Place the sieve tray 5 and the corresponding screen 6 on the
instrumental platform, and put the screen head 7 on the top, then lock
up with lock nut 8, same strength should be put forth to both sides.
3. Place the timer switch 1 in the “Off” position, turn the
amplitude-modulated knob 2 to the minimum position and place the
function switch 4 in the “Continuation”.
4. Plug the power cord into the AC outlet, select an operating mode on
the function knob according to the type of the material to be sieved,
then start the timer, thus making the vibrating screen to be in the
operating mode. Continuously adjust the amplitude-modulated knob 2,
the vibration amplitude would change, turn the amplitude-modulated
knob 2 to the position what you need according to the graduation on
the screen head.
5. Place the function switch 4 in the “Fine”, the amplitude is ineffective,
should turn the amplitude-modulated knob 2 to the minimum position
VI.
Common Breakdown and Handling
Breakdown Appearance
Reason and Handling method
The instrument does not work.
Fuse is blown out, please change.
(It is installed on PCB, if you can
not handle, please contact our
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Technical Service Department)
The knob is fallen off.
Please take away the cap on top of
knob, use cross-screwdriver to
screw down. After the knob is
locked, close the cap.
The screen head is not fixed firmly By reason that the strap is too long,
for the strap is loose.
please adjust it to the range which
the teeth can work.
VII. Maintenance
1. In order to ensure vibration is effective when using, the instrument
should be put on the stable platform which is made of stone.
2. The instrument should be covered with a plastic cover hood when it is
not used.
3. When the instrument has breakdown, please contact our Technical
Service Department.
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