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Патент USA US3052075

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Sept. 4, 1962
R. D. FOSTER
3,052,066
ABRASIVE CLEANING OF PIPE
Filed March 10, 1961
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SePt- 4, 1962
R. D. FOSTER
3,052,066
ABRASIVE CLEANING OF PIPE
Filed March 10, 1961
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United States Patent 0
1
3,€i52,4l66
ABRAMVE CLEANING 6F PEPE
Robert 1). Foster, Houston, Tex, assignor to Crutchen
Rolfs-Curnmings, Inc, Houston, Tex, a corporation of
Texas
Filed Mar. 10, 1961, Ser. No. M334
6 Claims. (Cl. 51-9)
3352,1365
Patented Sept. 4, 1962
2
portion of a hoist cable 7 having one end connected to a
suitable power driven cable winding drum or winch unit
8. The opposite cable end depends downwardly and is
secured to the lowermost one of a number of telescop
ically inter?tted tubes 9 which ‘are slidabl-y keyed one to
another to resist relative rotation. The uppermost tube
of the telescopic group is ?xedly secured within a mount
ing bracket 1d carried by the superstructure platform 4
and locates the group on a vertical axis for their slida-ble
This invention relates to equipment ‘for cleaning in
projection
and retraction as controlled by the suspension
10
ternal surfaces of tubular goods such as joints of pipe
cable 7 and power winch operation.
up to forty inches in diameter and forty feet long which
At the bottom end of the lower-most collapsible tube
are to be coupled in end to end succession to make up a
9 there is supported an electric drive motor 11 having
?uid conduit or pipe line. Pipes of this type are made
its drive shaft disposed vertically ‘and projected down
from ?at steel plates formed to circular section and
for connection to the hub of a spinning rotor or
welded along adjoining longitudinal edges. A clean and 15 wardly
particle throwing wheel 12 having a series of circularly
smooth interior surface free of mill scale and other dirt
spaced apart vertical vanes, as seen in FIG. 3. Operating
minimizes frictional resistance to ?uid ?ow through a
current to the electric motor 11 is supplied by a suitable
pipe line and in many instances a protective coating is
conductor cable leading centrally through the telescopi
applied to the interior surface, which must be precleaned
cally nested tubes 9 ‘and during motor operation, torque
20
to obtain good adherence of the coating.
reaction of the motor casing is resisted by its ?xed con
An object of the present invention is to reduce han
nection with the slidably keyed together tubes 9. The
dling ‘awkwardness of heavy and large sections or joints
motor is enclosed within a protective housing 13 includ
of pipe to be cleaned in preparation for pipe line in
ing a downwardly tapered lower end portion 14 and an
stallation and to overcome di?iculties presented by in
25 upwardly tapered end portion 15 joined to the lowermost
accessibility to the interior surface of long pipe.
tube 9 as a part thereof.
A further object is to provide cleaning equipment for
In intervals between cleaning operations, the several
conveniently handling and standing a length of pipe up
tubes will be suspended in collapsed relation and the
right or vertically on end and for running through the same
spinner unit will be located inside a tubular cap‘ assembly
a motor driven spinner wheel for imparting centrifugal
30 16 having an outwardly ?aring bottom end 17 adapted to
force to throw ‘abrading material in small particle form
against the pipe interior surface for cutting through and
seat over the upper open end of a pipe 18. Near the
upper end of the cap member 16 are a series of internal
knocking loose ‘any mill scale, rust or other surface dirt
lugs or stop abutments 19 for seating engagement with a
accumulations, with the use of gravity to deliver cleaning
particles downwardly from the upper open pipe end to the 35 downwardly tapered funnel 20 centrally secured at the
base of the tapered connector portion 15 for co-opera
vertically moving centrifugal thrower iand to cause par
tion therewith in affording a narrow annular valley in the
ticles and cleanings to drop out through the bottom open
region of convergence of the two tapered surfaces and
end of the upright pipe.
which act as de?ectors for particle material delivered
Another object of the invention is to suspend the travel
thereto.
ing spinner unit from an overhead superstructure which 40 downwardly
At the completion of a cycle of pipe cleaning opera
also supports a storage hopper to feed abrading particles
tion, elevation of the cable '7 will bring the cleaning unit
toward the spinner unit and to receive particles elevated
out of the upper end of the pipe and into the cap 16 until
by a traveling conveyor leading from a collecting hop
the
tapered funnel 20 engages with the stops 19‘. Further
per below the standing pipe whereby to provide cir
cable
elevation then lifts the cap 16 until the outwardly
culation and a continuing rate of supply of abrading 45
?aring bottom portion 17 rises above the upper end of
particles.
the pipe 1'8. Following replacement of a new pipe to
Additional objects and advantages will become ap
be cleaned, the suspension cable 7 can be payed out for
parent from the following speci?cation of a preferred but
lowering the cap 16 into engagement and alignment with
not necessarily the only embodiment of the invention as
the pipe, whereupon the cleaning unit will descend from
seen in the accompanying drawings wherein FIG. 1 50
its reception within the cap 16 and will travel on down
is a side elevation of a complete assembly of pipe clean
wardly through the length of the pipe ‘for performing
ing mechanism of a nature to be readily portable for
the cleaning operation.
setting up at temporary locations along a pipe line right
For centering the cleaning unit, the protective casing
of-way as the work of installation proceeds; FIG. 2
13
a number of radial lugs for pivotally support
is a top plan view of the parts shown in FIG. 1 although 55 ing carries
outwardly swinging retractable lever arms 21 ter
the parts are not all in the identical positions of relative
minating in pipe engaging rollers 22 and being biased
adjustment; FIG. 3 is an enlarged sectional view showing
outwardly as by coil springs 23 interposed between each
the centrifugal thrower unit in a position above and
lever arm and the casing 13‘. To close the peripheral
outside the upper open end of a pipe and FIG. 4 is a
space beyond the rim of the de?ector 20‘, a ?exible an
transverse section on line 4-4 of FIG. 3.
60 nular ?ap 24 extends beyond the perimeter of the de?ec
For portability, there is shown in FIG. 1 a fragment
tor Ztl and bears elastically outwardly against the interior
of a road vehicle 1 at one end of which there is hinged
surfaces of the cap 16 and pipe 18. A similar closure
on a transverse horizontal axis 2 a foldable tower or
?ap 25 is provided on a ‘lower and downwardly tapered
mast 3 shown in raised position and as including at its
guide funnel 26 suitably bracketed to the casing 13 to
upper end a superstructure or carrier platform 4. The 65 extend in slightly spaced relation with the tapered sur
face of the lower end cap 14. For transfer of abrading
superstructure mounting includes a shaft 5 extending lon
particles from the bottom ‘of the de?ector 20 into the
gitudinally of the length of the mast 3 and projecting
lower guide chute afforded between the tapered surfaces
through a bearing portion of the superstructure or carrier
platform 4 for a controlled rocking or oscillation about
of the members 26 and 14, there are a series of circularly
the axis of the shaft 5. Mounted by the rockable plat 70 spaced apart tubes 27 shown in the drawing extending
longitudinally beside the casing 13. It will be noted that
form 4- at the upper end of the mast 3 are ‘a pair of spaced
the bottom discharge mouth of the tapered feed chute 26
apart pulleys 6——6 over which is entrained an intermediate
3,052,066
3
extends into an annular space surrounding the hub of the
wheel 12 and provided by the upwardly and outwardly
inclined inner edges of the vertically disposed rotor vanes.
More particularly, the bottom edge of the tapered chute
26, de?ning its central discharge opening, is disposed at
an angle to the horizontal or is inclined to a transverse
ll
ing adjustment of the superstructure platform about its
pivot mounting shaft 5 and between the two positions in
dicated by full lines and dotted lines respectively in FIG.
2. PEG. 2 also shows a pair of spaced apart outlet spouts
34 which will be provided with suitable gate valves and
ticles flowing downwardly by gravity on the chute will
will be positioned so as to discharge directly into the tu
bular member 16 when aligned with the pipe in either of
the two pipe locating frames.
leave the chute at various elevations around the circular
From the above description, it will be seen that there
plane perpendicular to the wheel axis. Accordingly, par
opening and will fall into contact with the vertically dis 10 has been provided a convenient and simple arrangement
posed vanes at various distances across the vertical face
of each vane. This provides a more uniform distribution
of the particles and more effective action thereon by the
vanes of the spinning rotor during motor operation.
for the vertical travel of a cleaning unit through an up
ended pipe together with the gravity supply of abrading
particles to a centrifugal thrower for the performance of
the cleaning operation and the gravity fall-out of the par
The abrading particles therein, by centrifugal force 15 ticles from the pipe, together with a conveyor mechanism
outwardly from the spinning rotor 12 during downward
for returning the particles and recirculation to the system.
travel of the spinner through a pipe to be cleaned, will
Although but one embodiment of the invention has been
strike the interior surface of the pipe with great force
disclosed, it will be understood that the mechanism is ca
for dislodging foreign material and affording a clean
pable of modi?cation without departing from the inven
metal surface. After striking and performing work on
tion as de?ned in the appended claims.
the surface of a vertically disposed pipe, the particles will
What is claimed is:
drop by gravity and fall clear of the pipe through its
1. For cleaning the interior of a pipe or like tubular
bottom open end. The fall-out will be received within a
object whose opposite ends are open, mechanism includ
collector hopper 28 having an inclined wall leading later
ing pipe engageable means to locate a pipe in an up
ally to a bottom portion out of vertical alignment with 25 right position for operation thereon, a supporting super
pipe location. A series of buckets are carried by an end
structure above the upper open end of an upright pipe
less and traveling conveyor loop 29 and dip into the col
located by said means, a working unit suspended by the
lection hopper 23 for carrying the particle material up
superstructure for entry into said upper end of and for
wardly to the top of the tower or mast 3. The conveyor
travel through the pipe and comprised of a spinner wheel
loop runs around the bottom sprocket wheel 30 and an 30 adapted to act on and throw abrading particles radially
upper sprocket wheel whose shaft has a drive pulley 31
outwardly of the wheel and a motor drive therefor and
to be geared or belted to an electric drive motor 32. On
means on said unit to ‘receive abrading particles fed
negotiating the upper sprocket, the conveyor upends the
downwardly ‘from the superstructure and to direct the
carrier buckets and their load is dumped into a storage
same into the central region of said spinner wheel, said
hopper 33 carried by the mast. From the storage hopper,
last mentioned means having an outlet arranged to deliver
the particle material, under control of a suitable gate
abrading particles into said central region of the spinner
valve, can be fed through a discharge spout 34 posi
wheel vat vertical levels which differ at circularly spaced
tioned immediately above the cup member 16. Under the
apart portions around the wheel axis.
controlled raterof discharge during the cleaning operation,
2. For cleaning the interior of ‘a pipe or like tubular
the particles fall by gravity into the cap 16 and on 4-0 object whose opposite ends are open, mechanism includ
through the open end of the pipe 18 for collection by the
ing pipe engageable means to locate a pipe in an upright
tapered de?ectors 15 and 20 of the travelling unit and
position
for operation thereon, a supporting superstruc
from which they are fed by the vertical pipes 27 into the
ture above the upper open end of an upright pipe located
chute 26 for centrifugal action on the particles by the
by said means, ‘a working unit suspended by the super
spinner wheel 12.
structure for entry into said upper end of and for travel
For handling the pipe 18 and for holding it in upended
through the pipe and comprised of a spinner wheel
relation beside the mast 3, it is proposed to provide a
adapted to act on and throw abrading particles radially
hinged frame 35 for swinging between upward and hori
outwardly of the wheel and a motor drive therefor,
zontal positions. The support for the hinged frame 35 is
a base or subframe 36 and the two frames are pivotally 50 and means on said unit to receive abrading particles fed
downwardly from the superstructure and to direct the
joined together at adjacent ends by a transverse cross shaft
same into the central region of said spinner wheel, said
37. Suitable pipe clamping arms 33 are carried by the
last mentioned means comprising a funnel whose outlet
hinged frame 35 to clamp the pipe therebetween and a hy
surrounds the axis of the spinner wheel and extends with
draulic jack 39 is joined at opposite ends to the respective
frames 35 and 36. Collapse of the jack 39 swings the pipe 55 in said central region and terminates in an edge inclined
to the plane through which the wheel rotates.
holding frame 35 to a horizontal or prone position for
3. For cleaning the interior of a pipe or like tubular
unloading and reloading of pipe. After the loading of a
object whose opposite ends are open, mechanism includ
pipe to be cleaned, the pipe held in the rack can be up
ing pipe engageable means to located a pipe in an up
ended by extension of the jack 39 so that the pipe will be
in an upright position for co-operation with the cleaning
unit.
In the interest of time saving, it will be desirable to du
right position for operation thereon, a supporting super
structure above the upper open end of an upright pipe
located by said means, a working unit suspended by the
superstructure for entry into said upper end of and for
travel through the pipe and ‘comprised of a spinner wheel
in other words, to provide a set of two hydraulically actu
ated pipe holding frames arranged in side by side relation 65 adapted to act on and throw abrading particles radially
outwardly of the wheel and a motor drive therefor, means
for alternate co-operation with the cleaning unit. This
on said unit to receive abrading particles fed downwardly
will mean that while one frame is holding a pipe in its
from the superstructure and to direct the same into the
vertical position adjacent the mast [and the pipe is being
central region of said spinner wheel, and means joining
cleaned, the other frame can be lowered for unloading and
said unit and the superstructure and accommodating rela
reloading of the pipe and for return to the upright posi
tion. Thereupon, upon completion of the cleaning oper
tive vertical travel of the unit while resisting rotative re
ation on the previously erected pipe, the cleaning unit can
action from the spinner motor drive.
be shiftedhorizontally into co-operation with the newly
4-. For cleaning the interior of a pipe or like tubular
erected pipe. Shifting of the cleaning unit into operating
object whose opposite ends are open, mechanism including
alignment above either pipe is accommodated by the shift 75 pipe engageable means to locate a pipe in an upright
plicate the pipe positioning mechanism just described or,
3,052,066
5
position for operation thereon, a supporting superstruc
ture above the upper open end of an upright pipe located
by said means, a working unit suspended by the super
structure for entry into said upper end of and for travel
6
hopper to the storage hopper, a motor driven abrading
material throwing wheel unit adjustably suspended by the
mast for travel through a pipe, a motor torque reaction
resisting connection joined to the mast ‘and to said unit
and accommodating the relative vertical swing travel of
the unit, pipe bearing means carried by said unit for
maintaining a centered relation thereof to the pipe and
means on the unit to catch abrading material discharged
means on said unit to receive abrading particles fed down
from the storage hopper into the top of the pipe and to
wardly from the superstructure and to direct the same
into the central region of said spinner wheel, said pipe 10 direct such abrading material into the central portion of
the wheel unit for a centrifugal action thereby for pro
engageable means comprising a pivoted frame swingable
pelling the abrading material outwardly against the sur
between an upright position and a prone position for the
through the pipe and comprised of a spinner wheel
adapted to act on and throw abrading particles radially
outwardly “of the wheel and a motor drive therefore and
loading and unloading of horizontally disposed pipe,
rounding pipe wall surface.
6. Mechanism for the internal cleaning of pipe includ
adjacent the foot of the superstructure and a power driven 15 ing a set of pipe handling mechanisms, each separately
means hingedly mounting the frame on a horizontal axis
operable on a pipe to hold the same in an upright
lift connection with the pivoted frame for effecting swing
ing movement thereof between said prone and upright
position and in side by side relation with its adjoining
positions.
mechanism, a superstructure above the upper ends of
pipes located upright by said handling mechanisms, a
5. Pipe cleaning mechanism including a pipe holding
frame, a pivotal mounting therefor accommodating ad 20 rotary cleaning device vertically adjustably suspended by
justment of the frame from a prone loading position to
said superstructure for coaxial travel through pipes to be
an upright pipe working position, a collector hopper posi
cleaned and means shiftably mounting said superstructure
tioned to underlie the bottom of a pipe positioned upn'ght
for its adjustment to present said cleaning device above
by said frame and to receive abrading material dropping
and for coaxial travel within an upright pipe located by
through the pipe, a vehicle to be positioned ‘beside said
any pipe handling mechanism of the set.
collector, -a folding mast fulcrumed on the vehicle for
swing adjustment thereof from a lowered position to an
elevated position adjoining the upright position of the
References Cited in the ?le of this patent
UNITED STATES PATENTS
frame, a storage hopper for abrading materials carried
by the elevated mast above and for discharge into the 30
upper end of a pipe located in upright position by the
‘frame, a conveyor extending between said hoppers and
operable to lift abrading material from the collector
1,045,742
Pontani ______________ __ Nov. 26, 1912
1,522,159
2,188,716
Vollmer _____________ __ Jan. 6, 1925
Jacobovics ____________ __ Jan. 30, 1940
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