WATER STORAGE TANK
A water storage tank is formed by a plurality of curved wall sections adapted to be secured together to form a circular tank. A ground mat is placed on the ground and extends outwardly of the tank wall. A plurality of hold down members are placed at the inside juncture of the tank wall and ground mat. A flooring sheet overlaps the ground mat and extends up and over the side wall of the tank and is clamped to an upper portion of the wall. A tubular fitting extends through a lower portion of the side wall to provide an inlet and outlet for water.
1. Field of the Invention
This invention relates to a water storage tank that can be assembled on a work site where there is a need for storing water. Also disclosed is a plurality of subcombinations that can be used in conjunction with known water storage tanks including a hydraulic hold down, a spout, a clamp, and wall joint structure as more fully disclosed herein.
2. Description of Related Art
In the oil and gas industry, water storage has become an issue due to the large amount of barrels of water required to perform drilling operations. Cost of transporting a large number of tanks to location, and logistical problems of having enough space at the well site to accommodate their positioning has forced the oil and gas industry to find a solution. The solution that has developed is the use of a single mobile erecting tank. These tanks eliminate a large fleet of storage vessels and the cost of transporting them to location.
These large capacity tanks normally comprise 16 single panels that connect together side by side, forming in one embodiment a 122 ft. diameter tank with a height of 12 ft. After they are assembled a rubber sheet, plastic, or polypropylene sheet is positioned in the inside and the edges are laid over the top rail of the tank. These edges of the sheet are secured to the top rail by the use of c-clamps.
The suction lines are then hung over into the tank and the tank is then filled with water. As the tank is filled, water forces the sheet into the lower inside corners of the tank. This can allow the sheet to be pinched or protrude under the wall of the tank causing a leak or tear of the rubber sheet.BRIEF SUMMARY OF THE INVENTION
The present invention employs a first ground cover mat that is positioned on the ground. The mat is circular in shape and extends beyond the wall sections of the tank which are placed on top of the mat to form a circular wall. A second mat may then be positioned on top of the ground mat within the area of the walls. A plurality of arcuate hydraulic hold downs are positioned at the junction of the tank wall and second mat around the entire interior of the tank. The hold down helps stabilize the side and provides for a protection device that prevents the rubberized sheet from protruding under the tank wall and not allowing the rubber to be exposed to a sharp ninety degree corner.
A novel spout assembly is also disclosed so as to enable water or other fluids to be pumped into and out of the tanks
Finally, a novel clamping mechanism has been developed to clamp the final sheet of material over the top portion of the circular wall of the tank.
While this discussion of a summary of the invention has been provided, it is understood that the invention of the present invention is defined by the claims included at the end of this specification.
An embodiment of the invention will now be discussed with reference to the figures. As shown in
Pins 39 may be secured within apertures 37 by a suitable fastening device such as a pin extending through a bore in pins 39. Also a sealing gasket 12 may be placed over the vertically extending joint to prevent the final layer from being forced into the joint as will be described below.
Channels 51 may be formed in the ground within the area defined by the circular wall to provide a drainage ditch.
Prior to the wall sections being placed on the ground 101, a circular ground mat of flexible water impermeable material 2 is positioned over the ground which has been leveled and cleared of debris to the extent necessary as shown in
A protective mat 3, which can be made of felt, polypropylene, rubber, or various types of padding, may be laid on top of ground mat 2 within the wall of the tank as shown in
By way of example, horizontal portion 41 may be about twelve inches in width and portion 42 may be two inches in height. The hydraulic hold downs also help to stabilize the side walls.
Once the hold downs have been placed around the entire inner periphery of the tank wall, a protective strip 5 of material which may be felt, rubber, polypropylene, or any other protective material is placed on top of the hydraulic hold downs as shown in
The next step in constructing the water tank is to position a flexible, circular floor sheet over the wall assembly so that it will cover the ground within the tank wall and extend upwardly and over the top portion of the tank wall as shown in
A plurality of threaded bolts 64 extend through apertures formed in strips 61 and 62 at a position below where the spacers are located. Nuts 65 are positioned on each end of threaded bolts 64. As the nuts are threaded inwardly, they will engage strips 61 and 62 which will cause the strips to flex inwardly and thus clamp sheet 8 to the upper portion of wall 8 when the clamps are positioned as shown in
Clamps 60 may be spaced around the top of tank wall 4 or they may completely cover the top portion of the wall.
As shown in
In order to form a water tight seal, a rubber seal 79 is positioned between the flange 4 and the inside surface of tank 4. The rubber seal may consist of the portion of the floor sheet that extends upwardly along the inner tank wall or may be a separate circular ring member. A wall stiffening ring 99 is welded to the outside surface of the wall. Next a pair of split rings as shown in
Rubber seal 79 may be a conventional circular seal.
Wall stiffening ring 99 is a circular washer of stiff material and has a hole diameter so that it sits on outer surface 76 of the fitting 70.
The keeper ring 80 is illustrated in
A split ring is shown in
Two split rings are placed within the groove 75 of fitting 70 as shown in
Although the present invention has been described with respect to specific details, it is not intended that such details should be regarded as limitations on the scope of the invention, except to the extent that they are included in the accompanying claims.
1. A water storage tank that can be assembled at a remote location comprising:
- a plurality of curved wall sections adapted to be connected together to form a circular wall of the tank;
- a ground mat covering the ground within the tank and extending outwardly from the wall a given distance;
- a plurality of hold down mechanisms positioned on top of the ground mat having a first horizontal portion and a second vertical portion extending upwardly along the wall of the tank;
- a flexible tank floor formed of sheet material overlying the ground mat and extending upwardly and over an upper portion of the circular wall of the tank; and
- a plurality of clamps for clamping the flexible tank floor to the upper portion of the circular wall of the tank.
2. A water storage tank according to claim 1 further including a tubular fitting extending through a lower portion of a wall section for providing fluid communication between the tank and a fluid conduit.
3. A water storage tank according to claim 1 wherein the hold down mechanisms further include a curved section between the horizontal and vertical portions.
4. A water storage tank according to claim 3 wherein the hold down mechanisms are curved in a horizontal plane to conform to the curvature of the tank side wall.
5. A water storage tank according to claim 1 further including a protective mat positioned between the ground mat and the flexible floor.
6. A water storage tank as claimed in claim 1 further comprises a strip of protective material overlying the hold down mechanisms to protect the flooring from corners of the hold down mechanisms.
7. A water storage tank as claimed in claim 3 wherein the hold down mechanisms include a reinforcement L-shaped member extending along the curved portion of the hold down mechanism.
International Classification: B65D 88/08 (20060101); B65D 88/52 (20060101); B65D 8/02 (20060101); B65D 8/04 (20060101); B65D 25/16 (20060101); B65D 25/24 (20060101);