MXPA99000167A - Subterrane secondary containment system previously assembled to contain combusti - Google Patents

Abstract

An underground secondary containment system is preassembled to a large extent at a manufacturing site before sending it to the installation site, thereby reducing the time spent at the installation site for the installation of the secondary containment system underground, including a tank double-walled fuel storage that has adjacent compartments isolated to store two different kinds of fuel, a pair of jet manifolds is mounted on a fuel storage tank at opposite ends thereof, a pair of tank manifolds is mounted on the tanks of fuel storage above the corresponding compartments, each tank collector is connected to each of the fuel collectors through the flexible pipe which extends along the exterior of the fuel storage tank; can provide two different kinds of gasoline to each spout without using exposed piping inside the fuel storage tank, the provision of separate tank connectors that are not located below the top-floor dispensing units allow easy access to the associated pump and accessories

Description

SUBTERRANE SECONDARY CONTAINMENT SYSTEM PREVIOUSLY ASSEMBLED TO CONTAIN FUEL FIELD OF THE INVENTION The present invention relates to an underground secondary containment system, whose fundamental purpose is to prevent the contained product, for example, fuel, from contaminating the surrounding environment.

BACKGROUND OF THE INVENTION Several devices will be used to contain fuel and other dangerous products to avoid contamination of the surrounding environment. One such system is disclosed in the U.S. Patent. 4,971,477. Another such device is disclosed in the U.S. Patent. 5,390,713. This last system, although it tries to reduce the installation time, has several significant disadvantages. First, where multiple dispensers are serviced by a single underground storage tank of multiple compartments, the adjacent compartments are connected by internal pipe, ie pipes disposed inside the storage tank and are continued between the adjacent compartments. Due to the variations in the fuel level of the adjacent compartments, the internal pipe is subject to stress and consequently rupture. This will result in the pollution of the highest class gasoline. Also, this system uses only a single containment chamber for each assortment unit above the ground. Therefore, in pressure systems the pump is housed in the containment chamber below the supply unit. This - makes access more difficult and also provides less area to service the pump.

OBJECTS AND BRIEF DESCRIPTION OF THE INVENTION An object of the present invention is to overcome the aforementioned deficiencies of the prior art. The present invention is directed to an underground secondary containment system that is pre-assembled largely at a manufacturing site before being sent to the installation site. In this way, a time spent at the installation site is reduced to install the underground secondary retention system. The secondary sub-containment system includes a double-walled fuel storage tank that has adjacent compartments insulated to store two different sides of fuel. A pair of jet manifolds are mounted on the fuel storage tank opposite ends thereof. A pair of tank manifolds are mounted on the tank for fuel storage above the corresponding compartments. Each tank collector is connected to each of the spout collectors by means of a flexible pipe that extends along the outside of the tank for fuel storage. In this way, two different sides of gasoline can be supplied to each spout without using piping arranged on the inside of the tanks for fuel storage. The provision of separate tank collectors that are not located below the above-ground supply units allow the • Easy access manifold and associated accessories.

DETAILED DESCRIPTION OF THE DRAWINGS, Figure 1 is a fragmentary front vertical view of a preferred embodiment of the present invention; ^ Figure 2 is a plan view of the preferred embodiment of the present invention; Figure 3 is an enlarged fragmentary front vertical view of the preferred embodiment of the present invention; and Figure 4 is a side vertical view of the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The preferred embodiment of the present invention will be described hereinafter with reference to the accompanying drawings.

FIGURES 1 TO 4 Referring to Figure 1, an underground secondary A containment system is depicted as shipped from the factory, after several components of the system have been submitted as to the integrity of the needles. The secondary sub-containment system A includes a double-wall storage tank B, a first pump manifold C, a first tank collector D, a second pump manifold E and a second tank collector F. The first and second pump collectors C and E, respectively, are each mounted directly below a conventional dispensing unit above the ground. Assortment unit above the ground (shown with dashed lines in Figure 1) is that element that is typically located on a conventional elevated plane of gas station that has a dispensing nozzle inflated thereto through which a particular kind of gasoline is dispensed. to the customer's car. The term "spout collector" as used herein is defined as a containment chamber connected directly beneath a supply unit above the ground containing a pump for pumping the contents of the underground storage tank to a spout above the ground. The term "tank collector" as used herein is defined as a containment chamber containing a pump for the contents of an underground storage tank to a spout above the ground and collecting the product escaping from the pump. and allows access for the repair of the ^^ 'service of the pump or the accessories for the same performs an up tube to keep the excavation filling away from the pump and the accessories for it. Preferably, the second or outer wall of the double wall storage tank D is made of high density polyethylene. In addition, it is preferable that the collectors C and E as well as the tank collectors D and E are formed of high density polyethylene. East ^ Material provides excellent chemical endurance, chemical resistance and burial stability. It is also easy to cut. The double wall storage tank D includes the adjacent first and second isolated compartments 2 and 4, respectively. The term "isolated adjacent compartments" as used herein is defined as two adjacent compartments of at least one underground storage tank for fuel that has no internal piping (i.e., piping arranged inside the fuel storage tank) that extends from one of the compartments adjacent to the other. The first compartment 2 is designated for the storage of super-class gasoline while the second compartment 4 is designated for regular gasoline of the unleaded class. The double-paired storage B of the present invention is contemplated, it does not include internal tubing extending between the first compartment 2 and the second compartment 4, the two JJ) 'compartment are truly insulated, and therefore the possibility of contamination of the super class with the unleaded class is eliminated because of the rupture of the internal pipe. The tank collector D is mounted (preferably by welding) on the storage tank D above the First compartment 2. The tank collector D contains a pump 6 which is connected to a spout 8 which extends to the first compartment 2. The tank collector D contains also a filling tube 10 extending from compartment 2 through which the first one is filled. compartment when empty. Preferably, the tank collector D includes a generally cylindrical collector bag 9, a riser pipe 11 and a removable cover 13 allows access to the collector, its associated fittings and the filling pipe 10. The riser pipe 11 can be or one piece separated from the base 9 generally cylindrical or a piece with it. The rising section 11 of the tank collector D extends to a conventional access point edge 15 (see FIGS. 1 and 3). A conventional cover 17 of the manhole is installed on the mouth 15 of the access port. It is well known about mounting tank manifolds on underground storage tanks as shown in the exposition of the U.S. Patent. 5,040,408, the entire citation of which is incorporated herein by reference. However, as shown in the '408 patent, the manhole cover is placed at the level of the graduation. In the present invention, the cover 17 for the manhole and the removable cover 13 are placed at a graduation represented by the arrow G (see Fig. 1) The upper surface of the cover 17 for the manhole is substantially at the same horizontal plane as the upper surface of a conventional raised plane disposed several centimeters above the graduation represented by the arrow H. The positioning of the cover 17 for the manhole and the removable cover 13 in this manner significantly reduces the plurality of that the water running through the surface enters the B tank connector because its cover is placed several centimeters above the graduation.Although it is conventional to mount a tank connector on an underground tank for fuel storage, it is not conventional to mount both a connector tank as a spout connector directly on a tank for fuel storage. With separate pollution chambers, the ability to access the various components of the system is significantly increased. An example of this is the pump 6 which is housed separately in the tank connector withdrawn from the spout above the floor. You can have easy access to pump 6 without going through the dispensing unit. further, the tank connector is separated provides more area to service the pump 6. Two sections of double wall pipe 12 and 14 are connected to the pump 6 through the conventional accessories, as seen in figures 1 and 2 The pipe section 12 extends through the connector base 9 to the spout connector C. The pipe 12 is connected to the tank connector base 9 and to the spout connector C with conventional bulkhead fittings. The pipe section 14 extends through the opposite side of the base 9 of the connector to the spout connector E (see Figure 2). The pipe 14 is connected to the base 9 of the tank connector and the spout connector E with conventional bulkhead fittings. The pipe tones 12 and 14 are preferably the Enviroflex pipe sold by Total Containment, Inc. which includes a flexible hose for fuel supply and a flexible secondary containment time. The supply hose is movable from the secondary containment tube and, in this way, the main tube can be placed without digging. Enviroflex tubing is described in the U.S. patent. No. 4,971,477 whose entire disclosure is incorporated herein by reference.

The latitude of the tank F is mounted (preferably by welding) on the storage tank B above. second compartment 4. The tank connector F houses a pump 16 which is operably connected to a welding pipe 18. As seen in Figure 1, the spout tube 18 extends to the second compartment 4 of the fuel storage tank B. The tank connector B also extends a filling tube 20 which extends into the second compartment 4 and through which the compartment is closed when it is empty. The tank connector F is similar in construction to the tank connector D. It includes a generally cylindrical connector base 17, a riser tube 19 and a removable cover 21. The excess tube 19 extends to the mouth edge 23 which it has a conventional flow 25 for manhole. As seen in Figure 3, the cover 25 for the manhole and the removable cover 23 are placed above the level represented by the arrow G and substantially in the same horizontal plane as the upper surface as a conventional elevated plane of a gas station represented with the arrow H. The edges 15 and 23 of the manhole must be noted and the corresponding manhole covers may be formed as shown in figure 1, which would require a sealed arrangement or may be sent separately. The pump 16 is connected to two sections of pipe 22 and 24 through conventional fittings, as seen in figures 1 and 2. The length of pipe 22 extends between the tank connector F and the spout connector B while the stretch of pipe 24 extends between the tank connector F and the connector C as best seen in figure 2. The 5 sections of pipe 22 and 24 are connected to the corresponding tank connectors and spout connectors by bulkhead fittings conventional In this way, unleaded fuels are supplied to each of the above-ground supply units placed directly above the -, connectors suppliers C and E. Preferably, the sections of ^^ pipe 22 and 24 are the Enviromex pipe. The spout connector C is pointed (preferably by welding) on the storage tank B above the first compartment 2. The spout connector B is placed directly from below and connected to a spout above the ground. The flexible 26 and 28 pipe sockets connect the super-lead and lead-free main tubes, ^ to valves 30 and 32. The fixing valves 30 and 32 are conventionally constructed. The units suppliers include a known mixer for mixing super class and unleaded gasolines to achieve at least an intermediate class of gasoline. In this way, the spout above the ground can provide at least three different classes. The spout connector E is similar in construction to the spout connector C. It is preferably welded to the polyethylene outer wall of the fuel storage tank B above the second compartment 4. The spout connector houses two lines of flexible piping 34 and 36 which connects the flexible main supply pipes of the super and lead-free classes, respectively the diversion valves 38 and 40 which are of conventional construction. The spout connector B is connected from below a spout above the ground that includes a mixer to mix the super and lead-free classes to achieve at least one intermediate class. In this way, the spout located above the spout connector B can provide at least three different types of gasoline. The pipes 12, 14, 22 and 24 are on the outside of the underground tank to store B and are therefore accessible without the need to enter the interior thereof. In addition, by placing the sections of pipe along the outside of the underground tank by storage B, they are not subject to the efforts with which the internal pipe would be located between storage compartments 2 and 4, due to differences in fuel levels of the first and second compartments. The assembly illustrated in Figure 1 is in the form in which the factory is shipped to the particular site for installation. Therefore, most of the assembly of the components is complete before sending the installation site. This "reduces the insolation time of conventional piping systems It is also significant that the assembly can now be made by the component manufacturers, that is, the entity most familiar with the components. are connected before shipping, they can be tested for integrity of the manufacturing site to ensure the integrity of both the primary and secondary tubes before shipment As this invention having a preferred design is understood, it is understood which is susceptible to further modifications, uses and / or adaptations of the invention following in general the principle of the invention including here the deviations from the present disclosure which are sought within practice known or customary in the art to which the invention pertains; may apply to core features written to the present, and fall within the scope of the inv and the limits of the appended claims.

Claims (6)

NOVELTY OF THE INVENTION CLAIMS

1. - An underground secondary containment system previously assembled to contain fuel that is enviable to an installation site in a previously assembled state for ease of installation, comprising: an underground storage tank having at least first and second storage compartments to store at least first and second fuel classes; a first dispenser and a first tank collector mounted on said underground storage tank adjacent to said compartment; a second jet manifold and a second tank collector mounted on said underground storage adjacent to said second compartment; a first section of pre-assembled secondarily contained flexible primary tube, which extends and connects said first dispenser manifold to said first tank collector, said first flexible primary tube section being secondarily contained on the outside of said fuel storage tank. Underground; a second section of pre-assembled secondarily contained flexible primary tube, which extends and connects said first dispenser manifold to said second tank collector, said second flexible primary tube section being secondarily contained on the exterior of said fuel storage tank. underground such that the primary and second sections of secondarily contained flexible primary pipe are adapted to provide the first and second fuel classes for the first spout manifold; a third section of secondary flexible tube secondarily contained, previously assembled, extending and connecting said second spout collector and said first tank collector, said third section of said flexible primary pipe secondarily contained on the outside of said tank being disposed. underground fuel storage; a fourth section of pre-assembled secondarily contained flexible primary tube, which extends and connects said second dispenser connector and said second tank collector, said fourth section of said flexible primary tube being secondarily contained on the outside of said storage tank of said tank. underground fuel so that the third and fourth sections of secondarily contained flexible primary pipe are adapted to provide the first and second fuel classes to the second header manifold.

2. - The underground secondary containment system according to claim 1, further characterized in that each of the first, second, third and fourth sections of the secondarily contained flexible primary tube is located in a corresponding section of the flexible secondary containment tube for provide secondary containment

3. - The underground secondary containment system according to claim 2, further characterized in that the sections of the flexible secondary containment tube allows the replacement of the flexible primary tube without excavation.

4. - The underground secondary containment system according to claim 1, further characterized in that: (a) said first and second tank collectors, include a base, a riser and a removable cover, each of said covers being placed removable above the level to reduce the likelihood that surface water will enter said first and second tank collectors.

5. - An underground secondary containment system according to claim 4, further characterized in that: (a) said first and second tank collectors are formed of polyethylene.

6. - The underground secondary containment system according to claim 1, further characterized in that: (a) said first and second storage compartments are isolated adjacent compartments.