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Publication numberUS3151418 A
Publication typeGrant
Publication dateOct 6, 1964
Filing dateJul 16, 1963
Priority dateJul 16, 1963
Publication numberUS 3151418 A, US 3151418A, US-A-3151418, US3151418 A, US3151418A
InventorsCroft Charles P, Powell George W
Original AssigneePangborn Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pipe cleaning apparatus
US 3151418 A
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Description  (OCR text may contain errors)

Oct. 6, 1964 G. w. POWELL ETAL 3,151,418

PIPE CLEANING APPARATUS 3- Sheets-Sheet 1 Filed July 16, 1963 Oct. 6, 1964 e.w. POWELL ETAL 3,151,418 PIPE CLEANING APPARATUS Filed July 16, 1963 3 Sheets-Sheet 2 III! Oct. 6, 1964 G. w. POWELL ETAL 3,151,418 PIPE CLEANING APPARATUS Filed July 16, 1963 3 Sheets-Sheet 5 Ufl d ate Page i The present invention relates to abrasive blast cleaning apparatus for cleaning both the inside and outside surfaces of pipes and large tubing.

Prior apparatus for abrasive blast cleaning of pipes has not been found to be satisfactory for one reason or another. One such apparatus requires that the pipe be positioned vertically for the blast cleaning operation. Accordingly, to clean a 40-foot section of piping, this would require an 80-foot elevation since the pipe must be vertically moved as it is cleaned. Also, an additional length is required for the support of the probing mechanism. The pipe is mounted first horizontally and then raised to the vertical position which requires multiple operations and additional apparatus. This above described apparatus also has its blast wheel located in the center of the unit and sprays abrasive on a 360 path. This severely the size of pipe or tubing that can be cleaned and further reduces the efiiciency of the unit as-the diameter increases.

Therefore, such an apparatus is more or less limited to the blast cleaning of short lengths of pipe and in addition is extremely cumbersome to operate.

It is, therefore, one object of the present invention to provide a new and novel pipe cleaning apparatus of the abrasive blasting type. 7

Another object of the invention is to provide a new and novel apparatus for simultaneously blast cleaning both the inside and outside surfaces of a pipe.

Still a further object of the invention is to provide a new and novel apparatus for cleaning both the inside and outside surfaces of a pipe simultaneously while the pipe is maintained in a stationary and horizontal position.

Other objects and advantages of the invention will become more apparent from a study of the following description and drawings wherein:

FIGURE 1 is a side view of the abrasive cleaning apparatus for pipes of the present invention;

FIGURE 2 is a top view of the apparatus of FIG- URE 1;

FIGURE 3 is an end view of the apparatus of FIG- URE 1;

FIGURE 4 is a detail as seen from the top and on an enlarged scale of a portion of the apparatus of FIGURE 1;

FIGURE 5 is an end view of the detail shown in FIG- URE 4; and

FIGURE 6 is an end view showing that both small and large minimum diameter pipes can be cleaned by the blast apparatus of the presentdnvention.

The overall apparatus is shown more particularly in FIGURES 1-3. Here, we see a horizontally extending monorail track 1 which supports driven roller assemblies 3 which in turn support pipe carrying lines 5. A lowering and raising pulley assembly 7 is supported on each pipe carrying line 5 whereby the ends of the pipe 9 may be lowered or raised for reasons which will be explained hereinafter.

With the above-described arrangement, the pipe 9-, shown in the phantom line position, is conveyed toward and into an abrasive blasting chamber 11. Once the pipe is moved into the chamber 11, it remains therein for the duration of the blast cleaning operation. At the opposite end of the blast chamber, there is shown a second monorail support or assembly 15 which supports a frame carriage 17 by rods 19 depending from driven roller as- 3,151,418 Patented Get. 6, I964 semblies 21 mounted on the monorail 15. The frame carriage 17 has an upper arm 23 and a lower arm 25 which extend horizontally and inwardly toward the blasting chamber 11. The lower arm 25 of the carriage and the carriage itself moves upon swivel wheels 27 which rest upon a ground support 29.

As further shown in FIGURE 1, an abrasive blasting wheel 30 is positioned at each free or inner end of the upper and lower arms 23 and "25 of the-carriage 17. The upper abrasive blasting wheel 30 will spray abrasive along the outside surface of the pipe while the lower blasting wheel 30 sprays abrasive along the inside surface of the pipe. In order to spray blast the entire circumference of "both the inner and-outer surfaces, the pipe is rotated on drive "rollers 32 as shown in FIGURES 1 and 3.

The blasting operation is performed by moving the carriage 17 along the track '15 toward and into the blasting cabinet 11 after the pipe 9 has been moved into the blast chamber 11 by monorail assembly 1. With this movement, the upper blasting wheel 30 moves slowly axially of the pipe along the exterior surface thereof while the lower blasting wheel 30 does the same within the pipe interior. The wheels '27 which support the carriage "ride into the pipe travel along the pipe wall as the pipe is rotated. After traveling the full length of the pipe, the carriage 17 is then retracted along track 1-5 to the position shown in FIGURE 1.

Below the blasting cabinet and the tracks 1 and '15,

there ispro'vided {a pit =35 which has a tapered wall bin 37 '-supp'o'rted the-rein and which houses a screw conveyor -(not *shown). Abrasive and debris removed from the pipe'pass downwardly throughthe lower-screen 39 (see FIGURE 3) which forms a bottom wall of the blasting c'hainber '11, This is collected by the screw conveyor,

passed into funnel 41 (FIGURE 3) whichleads to ele- "vat'or 43 which raises the abrasive up through an -ai'r separator 44 from which point it'passes to -a feed hopper 45. From the-hopper 45 it is dropped'into feed lines 47 and 49 which lead to abrasive conveying troughs in the upper and lower arms 23 and 25 of the carriage 17 as will be described hereinafter.

The air separator 44 and the screen 39 at the bottom of the blast chamber 11 serve to remove debris from the shot blast.

When the pipe 9 has been cleaned, it is retracted to the position shown in phantom in FIGURE 1 after which the innermost end of the pipe 9 is lowered by the raising and lowering mechanism 7 until it assumes the full line position as shown in FIGURE 1. When in this position, the debris and shot will slide out of the pipe intothe bin 37 to be picked up by the screw conveyor and recycled as explained above.

FIGURES 4 and 5 are details on an enlarged scale of a portion of the apparatus shown in FIGURES 1-3. In particular, the details are of the lower arm 25 connected with the carriage 17. As explained above, this arm extends into the pipe interior to clean the inner surface thereof.

An abrasive carrying trough 5i is supported at the upper left-hand corner of the arm 25 when looking at FIGURE 5. Abrasive is fed into the trough 50 by the feed line 49 which is also shown in FIGURE 3. The abrasive is moved forward in the trough by a screw conveyor 52 mounted for rotation in the trough 50. The abrasive is moved forward until it reaches a rectangular slot 54 in the floor of trough 50 from which point it passes downwardly into a funnel 56 which feeds the abrasive to the blasting wheel 58. As shown better in FIGURE 5, the impeller (not shown) feeds abrasive through slots 60 of the feed cage to the rotating blades 62 of the blast wheel 58. The slots are so arranged that the blast is sprayed upwardly and downwardly in a fixed path, and as the pipe is rotated on roller 32 the entire inner surface of the pipe is thus spray blasted and cleaned. The same arrangement exists for upper arm 23.

The blast wheel 58 is rotated by a motor 65 also supported by the arm 25 and driven through belt 76 as shown better in FIGURE 4.

FIGURE 6 is an end view of the lower arm of the carriage 17 and shows the minimum and maximum diameter pipes which can be treated by the apparatus. As seen therein, this diameter can vary to a great degree. For instance, 48 and 96 inch diameter pipes can be cleaned by the'present apparatus.

As mentioned above, the advantages of the present invention are that the pipes 9 can be treated in a horizontal position which means that any length or size pipe can be easily handled. In addition, the spray blast pattern is fixed whereby fixed relation for the entire length of the pipe is maintained and thus more uniform cleaning is provided as the pipe is rotated by the roller 32.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is, therefore, to be understood that Within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

l. A pipe cleaning apparatus comprising a blast chamber, means for feeding and withdrawing a pipe into said chamber, means in said chamber for rotating said pipe, a carriage, means for moving said carriage into and out of said chamber, an upper arm supported on said carriage, a lower arm supported on said carriage, an abrasive blasting wheel supported at the free end of each arm, and means connected with said arms for feeding abrasive to said wheels supported by each arm, said lower arm being so positioned as to extend into and travel along the pipe interior and said upper arm being so positioned that it travels along the pipe exterior.

2. The pipe cleaning apparatus of claim 1 wherein the abrasive feeding means supported by each arm is an elongated trough extending axially of each arm, and a screw conveyor is supported in each trough.

3. The apparatus according to claim 2 wherein a pit is provided beneath the blasting chamber for collecting used abrasive, an elevator is mounted in said pit for raising the abrasive therefrom, an air separator is connected with the top portion of the elevator for receiving the abrasive therefrom, and an abrasive supply hopper is connected with said separator and said abrasive feeding means.

4. The apparatus of claim 1 wherein the lower arm of the carriage is supported on swivel wheels which run along the pipe wall when the carriage is moved into and withdrawn from the blast chamber.

5. The apparatus of claim 1 wherein the means for moving the pipe into and withdrawing the pipe from the blast chamber is a monorail assembly.

6. The apparatus of claim 5 wherein the monorail assembly has pipe suspending lines connected thereto, and raising and lowering assemblies connected with such lines for raising and lowering at least one end of said pipe.

7. The apparatus of claim 3 wherein the pit extends beyond the blast cabinet for collecting abrasive and debris expelled from the pipe after the pipe is withdrawn from the blast chamber.

8. The apparatus of claim 7 wherein the blast chamber has a perforated bottom wall, and a bin unit is supported in the pit below said chamber for collecting falling abrasive and debris.

9. The apparatus of claim 1 wherein the means for moving the carriage into and out of the blasting chamber is a monorail assembly.

References Cited in the file of this patent UNITED STATES PATENTS 1,952,848 Eckler Mar. 27, 1934 2,089,597 Carter Aug. 10, 1937 2,131,769 Turnbull Oct. 4, 1938 2,358,557 Boyd et a1 Sept. 19, 1944 2,460,989 Kraner Feb. 8, 1949 2,621,446 Russell Dec. 16, 1952 2,951,319 Kornhaus Sept. 6, 1960 3,052,066 Foster Sept. 4, 1962 3,058,137 Doyle et al Oct. 16, 1962

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1952848 *Aug 31, 1933Mar 27, 1934Wilhelm EcklerMethod of and apparatus for treating the inner surface of tubular bodies with blasts
US2089597 *Dec 3, 1934Aug 10, 1937Carter Pneumatic Tool CompanyTube cleaning machine
US2131769 *Aug 21, 1936Oct 4, 1938American Foundry Equip CoApparatus for treating metal articles
US2358557 *Jun 26, 1942Sep 19, 1944Boyd John GBlast cleaning device
US2460989 *Jun 2, 1947Feb 8, 1949Gen Paint CorpPipe-cleaning machine
US2621446 *Apr 16, 1952Dec 16, 1952Hydraulic Supply Mfg CompanyGrit blasting device for cleaning pipes and the like
US2951319 *Jul 1, 1957Sep 6, 1960Kornhaus Floyd IDevice for sand-blasting bores
US3052066 *Mar 10, 1961Sep 4, 1962Crutcher Rolfs Cummings IncAbrasive cleaning of pipe
US3058137 *Jan 13, 1960Oct 16, 1962Earl N DoylePipe line treating apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3835587 *Jul 3, 1973Sep 17, 1974Hall WPipe cleaning apparatus and method
US4016681 *Dec 11, 1975Apr 12, 1977Wheelabrator-Frye, Inc.Surface treatment device for large diameter pipe sections
US5231804 *Jul 16, 1991Aug 3, 1993Stripping Technologies Inc.Hose cleaning system
US5239786 *Apr 22, 1992Aug 31, 1993Pangborn CorporationInside pipe cleaner
US6550486 *Feb 7, 2001Apr 22, 2003Mac & Mac Hydrodemolition, Inc.Moving vehicle through pipe to scarify first swath of interior surface of pipe, wherein fluid nozzle assembly is then repositioned and vehicle is moved through pipe to scarify second swath of interior surface of pipe
US6739950 *Dec 9, 2002May 25, 2004Joerg KrusePipe renovating system and method
US7160574Aug 27, 2003Jan 9, 2007Pipe Restoration Technologies, LlcBarrier coating corrosion control methods and systems for interior piping systems
US7348039Dec 21, 2005Mar 25, 2008Jak AklianMethod of making a newly installed plumbing system renewable
US7517409Oct 7, 2005Apr 14, 2009Pipe Restoration Technologies, LlcBarrier coating corrosion control methods and systems for interior piping systems
US7858149Jan 4, 2007Dec 28, 2010Pipe Restoration Technologies, Llcrepairing leaks; air drying interior walls of the pipes and providing barrier (epoxy) protective coatings to the interior walls of metal or plastic water and gas pipes; without physically remove and replace the pipes; one step process
US7947316Aug 4, 2006May 24, 2011The Coca-Cola CompanyPod for dispersible materials
US7964230May 29, 2007Jun 21, 2011The Coca-Cola CompanyMethod of sealing a pod for dispersible materials
US8033242Mar 12, 2010Oct 11, 2011Pipe Restoration Technologies, LlcMethods and systems for coating and sealing inside of piping systems
US8206783Feb 18, 2009Jun 26, 2012Pipe Restoration Technologies, LlcBarrier coating corrosion control methods and systems for interior piping systems
US8327754May 9, 2005Dec 11, 2012The Coca-Cola CompanyCoffee and tea pod
US8343579Jun 11, 2010Jan 1, 2013Pipe Restoration Technologies, LlcMethods and systems for coating and sealing inside of piping systems
US8354140Nov 16, 2010Jan 15, 2013Pipe Restoration Technologies, LlcBarrier coating corrosion control methods and systems for interior piping systems
US8399035May 16, 2011Mar 19, 2013The Coca-Cola CompanyPod for dispersible materials
US8399813Oct 1, 2009Mar 19, 2013Pipe Restoration Technologies, LlcPortable heating apparatus for heating interior piping systems
US8505440Apr 2, 2007Aug 13, 2013The Coca-Cola CompanySystem for varying coffee intensity
US8524320Aug 3, 2012Sep 3, 2013Pipe Restoration Technologies, LlcProcess for coating the interior surface of water service lines
US8696823Nov 28, 2007Apr 15, 2014Pipe Restoration Technologies, LlcMethods and systems for abrasive cleaning and barrier coating/sealing of pipes
USRE44518 *May 2, 2007Oct 8, 2013Mac & Mac Hydrodemolition Inc.Method of scarifying an interior surface of a pipeline
EP0003291A1 *Jan 11, 1979Aug 8, 1979Wheelabrator-Berger Maschinenfabriken GmbH & Co. KG.Blast cleaning apparatus for tube surfaces
EP0016680A1 *Mar 4, 1980Oct 1, 1980Lutelec Luchaire EquipementAutomatic sand-blasting device for the interior of large objects and equipment comprising such a device
EP0132942A2 *Jun 19, 1984Feb 13, 1985RAMCO OIL SERVICES plcPipe cleaning or treating plant
WO1983001220A1 *Oct 1, 1982Apr 14, 1983Fingerroos Markku JuhaniEquipment for the treatment of cylindrical hollow structures by means of blast cleaning
Classifications
U.S. Classification451/76, 451/88
International ClassificationB08B9/02, B24C3/32, B24C3/00
Cooperative ClassificationB24C3/325, B08B9/027
European ClassificationB24C3/32C, B08B9/027
Legal Events
DateCodeEventDescription
Jul 1, 1981ASAssignment
Owner name: KENNECOTT CORPORATION
Free format text: MERGER;ASSIGNORS:BEAR CREEK MINING COMPANY;BEAR TOOTH MINING COMPANY;CARBORUNDUM COMPANY THE;AND OTHERS;REEL/FRAME:003961/0672
Effective date: 19801230