US 2016/0151874 A1Published application

Method of grinding an inner surface of a cylindrical tank

AssigneeCkj Steel A/S

InventorCarsten Kenneth Jensen

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Abstract

A method of grinding an inner surface of a tank that includes convex first and second parts joined by a cylindrical part, the together defining an inner surface, the method including providing a frame for holding the tank and a stand rotatably connected to the frame. Initially, the frame assumes a horizontal position, and an amount of grinding material is placed into the tank covering a part of the inner surface of the tank. Thereafter, the tank is rotated about a central axis, causing the grinding material to move in a sliding and non-tumbling movement relative to the inner surface. The rotation is repeated in a first tilted position and in a second tilted position, wherein the grinding material extends on the inner surface between the cylindrical part and the respective points of interception between the first and second parts and the central axis of the tank.

Claims17

Dependent claims

A method of grinding an inner surface of a cylindrical tank comprising a convex first part, a convex second part, and a cylindrical part interconnecting said first part and said second part, said first part, said second part, and said cylindrical part together defining said inner surface, said cylindrical part defining a central axis, said method comprising the steps of:

(a) providing a grinding assembly, said assembly comprising:
(1) a frame configured for holding said cylindrical tank so as to prevent substantial movement of said cylindrical tank except around said central axis, said frame comprising a motor and a drive mechanism operably connected to said motor, said drive mechanism being operable for interacting with said cylindrical tank;
and
(2) a stand rotatably connected to said frame, said stand defining a tilt axis in relation to said frame, said tilt axis being horizontal and perpendicular to said central axis;
(b) holding said cylindrical tank by said frame and causing said frame to assume a horizontal position in which said first part and said second part are level;
(c) placing an amount of grinding material into said tank such that said grinding material covers a part of said inner surface and extends between said convex first part and said convex second part;
(d) rotating said cylindrical tank about said central axis by using said motor and said drive mechanism at a rotational speed not exceeding 100 rpm and causing said grinding material to move in a sliding and non-tumbling movement relative to said inner surface;
(e) causing said frame to assume a first tilted position in which said first part is located above said second part, and said grinding material extends on said inner surface between said cylindrical part and a first point of interception between said second part and said central axis;
(f) rotating said cylindrical tank about said central axis with said motor and said drive mechanism at a rotational speed not exceeding 100 rpm and causing said grinding material to move in a sliding and non-tumbling movement relative to said inner surface;
(g) causing said frame to assume a second tilted position in which said first part is located below said second part, and said grinding material extends on said inner surface between said cylindrical part and a second point of interception between said first part and said central axis;
and
(h) rotating said cylindrical tank about said central axis with said motor and said drive mechanism at a rotational speed not exceeding 100 rpm, and causing said grinding material to move in a sliding and non-tumbling movement relative to said inner surface.

9 more elements

A mobile system for cleaning a vessel, such as a tank or pipeline, with a cleaning fluid, said system comprising:

a first trolley comprising an internal reservoir dimensioned to hold a volume of cleaning fluid, and a fluid connector configured for connecting to said internal reservoir from outside of said first trolley, said first trolley further comprising a heating system operable for heating any cleaning fluid that may be contained within said internal reservoir;
a second trolley comprising a conduit with a fluid inlet having an inlet valve and connectable to said fluid connector of said first trolley, and a fluid outlet having an outlet valve and connectable to said vessel, said conduit comprising a pump connected to said fluid inlet and operable for pumping cleaning fluid from said internal reservoir of said first trolley via said fluid inlet and fluid outlet to said vessel, said second trolley further comprising a relief valve configured for relieving said conduit of any excessive pressures, a pressure measurement device operable for measuring the pressure within said conduit, a temperature measurement device operable for measuring the temperature within said conduit, a flow measurement device operable for measuring the flow of cleaning fluid through said conduit, and a processing unit for receiving said measured pressure, temperature and flow,
each of said first trolley and said second trolley having at least 2 wheels, and each of said first trolley and said second trolley having a height and a width less than the height and width, respectively, of a standard residential door.

Dependencies are inferred from the claim text.

Facts

Application: 14/955,921Filed 1 Dec 2015
Priority: EP 14195841.32 Dec 2014
Published: 2 Jun 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B24B 1/00
Processes of grinding or polishing
B08B 9/032
Cleaning the internal surfaces; Removal of blockages: by the mechanical action of a moving fluid, e.g. by flushing
B08B 9/08
Cleaning hollow articles by methods or apparatus specially adapted thereto: cleaning containers, e.g. tanks
B08B 9/0817
Cleaning containers having tubular shape, e.g. casks, barrels, drums: by agitating or tumbling containers filled with liquid or liquid and…