GB2321662A

GB2321662A - Cistern/tank panel seal

Info

Publication number: GB2321662A
Application number: GB9616339A
Authority: GB
Inventors: John Robert Lockley
Original assignee: IND MARINE FIBREGLASS PRECOLOR
Current assignee: IND MARINE FIBREGLASS PRECOLOR
Priority date: 1996-08-02
Filing date: 1996-08-02
Publication date: 1998-08-05
Also published as: GB9616339D0

Abstract

A tank or cistern comprises flanged panels with seal recesses (8) in the outer faces of the flanges to contain a seal (7). The panels, which may be of reinforced plastics, may have a foam insulating layer (9) between layers (3) and (4), and have a curved rebate (5) at the base of the flange, so that leakage from the base of the tank can be located. Adjacent panels are bolted together, and flat areas (11) perpendicular to the bolt axes are provided on the flanges.

Description

SECTIONAL CISTERN / TANK PANELS This invention relates to the the design of reinforced resin / plastic sections which fasten together to form a cistern or tank.

Cisterns and tanks which are built by fastening sections together are well known methods of containing liquids.

Many designs have the disadvantage of the surrounding fixing flange being made with a slight taper to facilitate mould release and requiring a flexible or soft flat seal material held between the flange faces to create the seal. When erecting on a flat base with the flanges (which are normally bolted) pointing into the vessel they also have the disadvantage that a leaking base joint cannot be located.

Some designs incorporate insulation which is applied onto the main strength of the panel and is laminated over with a thinner or weaker laminate than the main panel According to the present invention there is a shape moulded into the corner angle, where the surrounding fixing flange joins the main plate of the panel, so that when the panels are joined together a clear area typically in the shape of a small tunnel is left below each joint to enable detection of leakage from a joint design which can be tightened with the face of each flange directly touching over the majority of the area of the flange face.

The front flange faces are produced at 90 to the face of the main plate of the panel. thereby enabling the two flanges to be fully tightened together holding a seal in the seal cavity and without putting any other strain on the plate, flange, bolt or fixing other than the normal stresses created from tightening a nut onto a bolt and creating a compression force on the items being bolted together.

The insulation and strength of the panel is created by encapsulating the insulation material between the front and the equally strong or stronger back laminate which when put under test or working pressure will take the majority of the strain.

A specific embodiment of the invention will now be described by way of example, with reference to the accompanying drawing in which Figure 1 is a cut away section through the flange and part of the main plate of the tank panel.

Figure 2 is of 2 panels with flanges touching, incorporating a seal in a reinforced plastic / resin sectional panel joint.

Referring to Figures 1 & 2: 1 is the flange of a tank panel with contact face 90 to the tank wall.

2 is the main plate of the panel.

3 is the front face laminate of the panel.

4 is the back face laminate of the panel.

5 is the shape moulded in the corner angle.

6 is the clear area or small inspection tunnel created when two panels join.

7 is the seal.

8 is the seal cavity.

9 is the foam insulation.

10 is the tapered back face of the flange.

11 is one of the raised bolting faces at 90 to the bolt stem.

Claims

1 A'sectional water tank panel having a seal recess in the joining flange.

2 A sectional water tank panel where a flange of the panel is joined to the next panel with the face of the flanges substantially in direct contact.

3 A sectional water tank panel having a seal holding recess in one or more of the joint flange faces together with a secondary recess where the flange joins the main plate of the panel.

4 A sectional water tank panel which incorporates a seal area where a flange joins the main plate of the panel.

5 A sectional water tank panel as in 1,2,3,pr4 which can be sealed to hold water by the addition of a suitable sealing material held in a recess in a joining flange.

6 A sectional water tank panel which includes a secondary seal between the recessed sealing joint in the flange face and the water contents.

7 A sectional tank panel which includes a secondary seal between the recessed seal joint and the liquid contents of the tank.

8 A sectional water tank panel as in 1,2,3,or 4 where the corner of the flange where it joins the front face of the panel is substantially as described herein with reference to figure 1 of the accompanying drawing.

9 A sectional water tank panel where the where the flange is manufactured so that the majority of the face of a joining flange is at 90" to the line across the face of the panel.

10 A sectional water tank panel where the back face of the joining flange has areas around the bolting points which are parallel with the front flange face which is 90" to the line across the panel face or 902 to the bolt stem.

11 A sectional water tank panel designed to be held together substantially with stay or supporting rods.

12 A sectional water tank panel where a corner recess or shape moulded where the flange joins the plate of the panel, creates an area that can be used as a leak detection area.

13 A sectional water tank panel which enables the sealing joint to be positioned off a flat base.

14 A sectional tank panel substantially as described in any of the preceding claims with -reference to figures 1, 2, 3, or 4 of the accompanying drawings.

15 A joining flange of a water tank section where the back face of the joining flange is substantially parallel with the back face of the next section flange.

16 A joining flange of a water tank section which has flat areas where the bolts or fixings pass through the flanges which are parallel with the areas on the adjoining section flange.

17 A liquid tank panel section designed to be held in its position in a tank with stay rods or supporting bars.

18 A sectional water tank panel designed to be held in place with between nil and three fixings on a joining flange.

19 A sectional water tank panel held in place with stay rods or supporting bars positioned in the distance between the front face of the panel and the back edge of the fixing flange.

20 A sectional water tank assembly substantially fastened together by strain taking bars or rods.

21 An assembly of tank panels fastened together with a system of stay or supporting rods or bars which reduces the number of fixing bolts to between o and 4 on any flange.

22 A sectional water tank panel as described in any of the preceding claims which is manufactured from reinforced plastic

23 A water tank made up from panels as described in any of the preceding claims.

24 A water tank assembled together as in any of the preceding claims.

25 A water ta,nk assembled substantially as described with reference to figures 3 or 4 of the accompanying drawings.

26 A sectional water tank panel which is manufactured with the outside skin or laminate designed to take more tensile stress than the front or inside skin or laminate which is contact with the contents of the tank.