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Patent Abstract
A drilling water filter (1) with a self-cleaning system including
a filter container (2), a cover (3) and a filter element (6) that
can be inserted in the flow arm between an inlet (4) and an outlet
(5) for separation of solid material from the fluid. The cover (3)
has a displaceable carrying handle (7) for transporting the drilling
water filter. The carrying handle (7) is connected with at least
one self-cleaning means, in a controlled manner.
Patent Claims
What is claimed is:
1. A drilling water filter with a filter container (2), a cover
(3) and a filter element (6) that can be inserted in a flow arm
between an inlet (4) and an outlet (5) for separating solid material
from the fluid, wherein the cover (3) has a displaceable carrying
handle (7) for transporting the drilling water filter, said carrying
handle being connected with at least one self-cleaning means.
2. The drilling water filter of claim 1, wherein the carrying handle
(3) can be pivoted away from the center of gravity.
3. The drilling water filter of claim 2, wherein the carrying handle
(3) is a rotationally pivotable stirrup grip.
4. The drilling water filter of claim 3, wherein a controlling
means (8) is connected to a rotationally displaceable carrying handle
axis (A) in a non-rotating manner, said controlling means (8) is
controllably connected with at least one self-cleaning means.
5. The drilling water filter of claim 4, wherein a permanent magnet
(9) is arranged in the controlling means (8), said permanent magnet
(9) having an associated Hall sensor (10) that effects a back-flushing
of the filter element (6) with fluid from a pressure-biased back-flushing
chamber (12), via an electrically controllable back-flush valve
(11).
6. The drilling water filter of claim 5, wherein the controlling
means (8) has a driving means (13) that mechanically drives a cleansing
means (15).
7. The drilling water filter of claim 6, wherein the driving means
(13) is a spring biased detent mechanism that mechanically and rotationally
displacing engages into circumferential detent recesses (14) of
the cleansing means (15).
8. The drilling water filter of claim 4, wherein the cleansing
means (15) is a brush (17) that is coaxial and rotational positioned
on the external cylinder sleeve of the filter element (6) having
inward oriented bristles (17a).
9. A method for self-cleaning a portable drilling water filter
(1), wherein the carrying handle (3) is stepwise displaced when
reversing the drilling water filter (1), comprising, a first step
of effecting a mechanical cleansing and, a second step of effecting
a back flushing.
Patent Description
BACKGROUND OF THE INVENTION
[0001] The invention relates to a portable drilling water filter
with a self-cleaning system.
[0002] According to DE 20110244U1, drilling water pumps take up
water, which is heavily contaminated with solid material, at low
pressure borehole and provide at separate outflows both filtered
water and borehole water with heavily concentrated solid material
under higher pressure. Regular back flushing of the drilling water
filter is necessary because of the heavy concentration of solid
material in the borehole water to prevent permanent accumulation
of same.
[0003] According to DE 19723798, a back flushing, cylindrical ceramic
filter cartridge has a coaxial rotational brush on the outside of
the cylinder sleeve, said brush having inward oriented bristles
for mechanical cleansing that are driven directly by the through-flowing
drilling water or by a separate motor. The rotary driving by virtue
of the through-flowing drilling water is too weak for waters that
are heavily contaminated with solid material; a separate motor,
on the other hand, is technologically costly.
SUMMARY OF THE INVENTION
[0004] The object of the invention is to provide a technologically
simple embodiment of a portable drilling water filter with an automatic
self-cleaning system.
[0005] This object is achieved by a drilling water filter, in a
filter holder having a cover, having a filter element that can be
inserted in the flow arm between an inflow and an outflow for separating
solid material from the fluid, wherein the cover has a displaceable
carrying handle for transporting the drilling water filter, which
is regulated using at least one self-cleansing means.
[0006] The self-cleaning operation is effected by reversing the
drilling water filter using the displaceable carrying handle that
is connected with self-cleansing means, whereby in the rough building
trades this occurs automatically in discontinuous intervals.
[0007] Advantageously, the carrying handle can be pivoted away
from the center of gravity of the drilling water filter, whereby
upon reversal of the drilling water filter, the gravity triggers
the self-cleaning operation.
[0008] Advantageously, the carrying handle is a rotationally pivoting
stirrup handle, wherein a rotary shift can be engaged on the carrying
handle axis.
[0009] Advantageously, a non-rotational controlling means is connected
with the carrying handle axis, which is connected with at least
one self-cleansing means, whereby the control information is present
in the cover zone.
[0010] Advantageously, a permanent magnet is arranged in the controlling
means, whose adjacent Hall sensor effects, via an electrically controlled
back-flush valve, a back-flushing of the filter element with fluid
from the pressure biased back-flush chamber, whereby the control
information for back-flushing can be tapped in a non-contact manner.
[0011] Advantageously, the controlling means has a driving means,
in the form of a spring biased detent mechanism that mechanically
rotationally and in a displacing manner engages in the circumferential
detent recesses of a rotationally displaceable cleansing means,
whereby the mechanical cleansing is directly effected mechanically.
[0012] Advantageously, the cleansing means is configured as a coaxially
rotating brush on the external cylinder sleeve of the filter elements,
whose bristles are inwardly oriented, whereby solid materials are
efficiently removable at the filter element.
[0013] Advantageously, upon reversal of the drilling water filter,
the carrying handle is stepwise displaced, whereby, in a first step,
a mechanical cleansing is effected and, in a second step, a back-flushing
is effected, whereby an effective self-cleaning occurs.
BRIEF DESCRIPTION OF THE INVENTION
[0014] The exemplary embodiment of the invention will now be more
completely described with reference to the drawings, wherein:
[0015] FIG. 1 shows a side view of a portable drilling water filter
according to the invention; and
[0016] FIG. 2 shows an internal view of the drilling water filter
in cross-section and in partial sections according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0017] According to FIG. 1, a drilling water filter 1, in a filter
holder 2 having a cover 3, has a filter element 6 that can be inserted
in the flow arm between an inflow 4 and an outflow 5 for separation
of solid material from the fluid. The cover 3 for transporting the
drilling water filter 1 has a displaceable carrying handle 7 that
is configured as a rotationally pivotable stirrup handle, which
can be swung away from the center of gravity S of the drilling water
filter 1. A controlling means 8 is connected with the carrier handle
axis A in a non rotating manner, wherein a permanent magnet 9 is
arranged next to a Hall sensor 10, which effects a back-flushing
of the filter element 6 with fluid from a pressure-biased back-flush
chamber 12, via an electrically controllable back-flush valve 11.
[0018] According to FIG. 2, on the inside of the cover 3, the controlling
means 8 further comprises a driving means 13 in the form of a spring
biased detent mechanism, which mechanically and rotationally displacing
engages into circumferential detent recesses 14 of a stepwise rotationally
displaceable cleansing means 15 moving rotationally stepwise around
the filter element axis B and which is configured as a brush 17
rotating coaxially on the outside of the cylinder sleeve of the
filter element 6, said brush having three brush carriers 16 displaced
circumferentially at 120.degree. having inwardly oriented bristles
17a.
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