CA2588543A1 - Flexible pipe enclosure - Google Patents
Flexible pipe enclosure Download PDFInfo
- Publication number
- CA2588543A1 CA2588543A1 CA 2588543 CA2588543A CA2588543A1 CA 2588543 A1 CA2588543 A1 CA 2588543A1 CA 2588543 CA2588543 CA 2588543 CA 2588543 A CA2588543 A CA 2588543A CA 2588543 A1 CA2588543 A1 CA 2588543A1
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- Canada
- Prior art keywords
- enclosure
- circumferal
- portions
- opening
- members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The present invention is predicated upon systems and method for the protection of pipe members, and the like, from corrosion. The present invention provides flexible enclosures, and methods of forming the same, that are capable of enclosing one or more pipe portions and fixtures attached thereto. In one preferred configuration, the enclosure comprises a unitarily formed flexible structure suitable for enclosing pipe portions, and features thereof, at a remote location such as at the bottom of an access hole for underground pipe portions.
Description
FLEXIBLE PIPE ENCLOSURE
FIELD OF THE INVENTION
The present invention relates generally to methods and devices for the protection of conduit systems particularly underground conduit systems.
BACKGROUND OF THE INVENTION
Numerous industries utilize conduits for transferring, distribution or protection of materials extending over a distance. While numerous conduits are available, one 1o particularly useful conduit includes pipe portions or the like, which can be linkably attached. Examples of products that may be transferred through pipe portions includes natural gas, propane, water, petroleum, industrial products, paper making material, chemicals, waste product, nuclear product or byproduct, food product, air and other fluids. However, non-fluid materials may also be advantageously housed within pipe portions such as: electrical wire, cable wire, the like, or otherwise.
In any case, it is desired to provide protection to these pipe portions and any attached fixture thereto from damaging conditions such as shifting earth, corrosive conditions or otherwise. Also, it may also be desired to seal these pipe portions and fixture from surrounding environmental conditions, or alternatively seal low pressure fluid leaks originating from the pipe portions or fixture.
In one exemplary utility field, a natural gas supply, including a network of main gas lines, is provided for delivering natural gas to different localities of a service region. From these main gas lines, branches extend to further supply more specific areas (e.g., blocks, subdivisions, business sector or otherwise), which may further branch to feed individual homes, business, or otherwise, with natural gas.
In connecting these homes, business or otherwise to a natural gas supply network, a fixture, such as a valve, may be utilized to control the flow of natural gas.
This control is desired during repair or alteration of a gas line, removal or the addition of gas lines, or otherwise. This control is also desired during emergency occurrences such as failure of the natural gas line.
In accessing these pipe, utility companies typically excavate large portions of earth in order gain access to these components. This type of excavation results in the formation of ditches, craters, holes or otherwise so as to allow individuals to physically climb down to where the pipe portions and fixtures are located.
This type of excavating process requires the use of heavy machinery (e.g., diggers, excavators, etc.) to remove the dirt, concrete or otherwise. Not only is this method time consuming and costly, due in part to the purchase and upkeep of equipment, but it is also inconvenient for surrounding homes and business's who must tolerate noise, road conditions and obstacles resulting therefrom.
In response to the above excavation inconveniences, the utility industry has responded with the use of keyhole technology, which has been found to be cost effective. Keyhole technology is the accessing of underground equipment by creating small and substantially vertical holes over pipe portions and fixtures, or otherwise.
This typically results in the formation of cylindrical-shaped holes, or otherwise, having substantially vertical walls. Typically, these holes are small wherein a person would not normally be able to access the underground pipes without the use of tools.
Examples of keyhole forming tools include drills, hydro cutting/digging tools, siphoning mechanism, the like or otherwise.
Upon completion of work to these pipe portions and/or fixtures, these components may be left with insufficient protection from surrounding environmental conditions (e.g., corrosion, earth shifting or otherwise).
Attempts have been made to protect these pipes by coating the pipe portion and fixture with anti-corrosion agents or wraps. However, the application of these protective measures has proven challenging due to the space constraints within a keyhole.
Given the difficulty in protecting underground pipe portions and fixtures, particularly within a keyhole, there is a need for protective systems, methods of protection, and tools for the installation of the same.
SUMMARY OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates generally to methods and devices for the protection of conduit systems particularly underground conduit systems.
BACKGROUND OF THE INVENTION
Numerous industries utilize conduits for transferring, distribution or protection of materials extending over a distance. While numerous conduits are available, one 1o particularly useful conduit includes pipe portions or the like, which can be linkably attached. Examples of products that may be transferred through pipe portions includes natural gas, propane, water, petroleum, industrial products, paper making material, chemicals, waste product, nuclear product or byproduct, food product, air and other fluids. However, non-fluid materials may also be advantageously housed within pipe portions such as: electrical wire, cable wire, the like, or otherwise.
In any case, it is desired to provide protection to these pipe portions and any attached fixture thereto from damaging conditions such as shifting earth, corrosive conditions or otherwise. Also, it may also be desired to seal these pipe portions and fixture from surrounding environmental conditions, or alternatively seal low pressure fluid leaks originating from the pipe portions or fixture.
In one exemplary utility field, a natural gas supply, including a network of main gas lines, is provided for delivering natural gas to different localities of a service region. From these main gas lines, branches extend to further supply more specific areas (e.g., blocks, subdivisions, business sector or otherwise), which may further branch to feed individual homes, business, or otherwise, with natural gas.
In connecting these homes, business or otherwise to a natural gas supply network, a fixture, such as a valve, may be utilized to control the flow of natural gas.
This control is desired during repair or alteration of a gas line, removal or the addition of gas lines, or otherwise. This control is also desired during emergency occurrences such as failure of the natural gas line.
In accessing these pipe, utility companies typically excavate large portions of earth in order gain access to these components. This type of excavation results in the formation of ditches, craters, holes or otherwise so as to allow individuals to physically climb down to where the pipe portions and fixtures are located.
This type of excavating process requires the use of heavy machinery (e.g., diggers, excavators, etc.) to remove the dirt, concrete or otherwise. Not only is this method time consuming and costly, due in part to the purchase and upkeep of equipment, but it is also inconvenient for surrounding homes and business's who must tolerate noise, road conditions and obstacles resulting therefrom.
In response to the above excavation inconveniences, the utility industry has responded with the use of keyhole technology, which has been found to be cost effective. Keyhole technology is the accessing of underground equipment by creating small and substantially vertical holes over pipe portions and fixtures, or otherwise.
This typically results in the formation of cylindrical-shaped holes, or otherwise, having substantially vertical walls. Typically, these holes are small wherein a person would not normally be able to access the underground pipes without the use of tools.
Examples of keyhole forming tools include drills, hydro cutting/digging tools, siphoning mechanism, the like or otherwise.
Upon completion of work to these pipe portions and/or fixtures, these components may be left with insufficient protection from surrounding environmental conditions (e.g., corrosion, earth shifting or otherwise).
Attempts have been made to protect these pipes by coating the pipe portion and fixture with anti-corrosion agents or wraps. However, the application of these protective measures has proven challenging due to the space constraints within a keyhole.
Given the difficulty in protecting underground pipe portions and fixtures, particularly within a keyhole, there is a need for protective systems, methods of protection, and tools for the installation of the same.
SUMMARY OF THE INVENTION
The present invention meets the needs of the industry by providing systems and methods for forming enclosures for the protection of elongated components, particularly pipe portions extending therein, from corrosion.
In one aspect, the present invention provides a flexible enclosure for one or more elongated members, such as pipe portions. The enclosure includes a unitary structure forming a plurality of members continuously attached to each other.
The plurality of members having a circumferal portion and lateral side portions extending from the circumferal portion, wherein each of the members are flexibly attached to each other through an integrally formed flexible hinge to allow movement of the enclosure between an open position and closed position. When the enclosure is in the closed position one or more of the lateral side portions define a first opening extending through the enclosure and one or more of the circumferal portions define a second opening extending through at least a portion of the enclosure. The first opening is configured to receive an elongated member, such as a first pipe member, and the second opening is configured to receive another elongated member, such as a second pipe member.
In another aspect, the present invention provides another enclosure for a pipe portion. The enclosure includes a first member having a circumferal portion surrounding at least a portion of an axis of the enclosure. The first member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure also includes a second member having a circumferal portion surrounding at least a portion of an axis of the enclosure.
The second member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure further includes a third member having a circumferal portion surrounding at least a portion of an axis of the enclosure. The third member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure further includes a fourth member having a circumferal portion surrounding at least a portion of an axis of the enclosure The fourth member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. A first hinge member is provided for connecting the first and second member thereby providing rotational movement of the first member with respect to the second member. A second hinge member is provided for connecting the second and third member thereby providing rotational movement of the second member with respect to the third member. A third hinge member is provided for connecting the third and fourth member thereby providing rotational movement of the third member with respect to the fourth member. The first, second, third and fourth members are moveable to form an enclosure which is capable of movement between an open position and a closed position, wherein the enclosure defines at least one opening for allowing a member to extend from within and/or through the enclosure.
It should be appreciated that the above referenced aspects and examples are non-limiting as other exists with the present invention as shown and described herein. Still further, it should be appreciated that the above referenced aspects and examples of the invention may be combined to form other unique configurations, as demonstrated in the drawings, or otherwise.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 illustrates a perspective view of one embodiment of an enclosure of the present invention enclosing a junction between two pipe members.
Fig. 2 illustrates a perspective view of another embodiment of an enclosure of the present invention in an open position.
Fig. 3 illustrates a perspective view of the embodiment shown in Fig. 2 in a partial open position.
Fig. 4 illustrates a perspective view of the embodiment shown in Fig. 2 in a closed position.
Fig. 5 illustrates a side elevational view of the embodiment shown in Fig. 2 in an open position.
In one aspect, the present invention provides a flexible enclosure for one or more elongated members, such as pipe portions. The enclosure includes a unitary structure forming a plurality of members continuously attached to each other.
The plurality of members having a circumferal portion and lateral side portions extending from the circumferal portion, wherein each of the members are flexibly attached to each other through an integrally formed flexible hinge to allow movement of the enclosure between an open position and closed position. When the enclosure is in the closed position one or more of the lateral side portions define a first opening extending through the enclosure and one or more of the circumferal portions define a second opening extending through at least a portion of the enclosure. The first opening is configured to receive an elongated member, such as a first pipe member, and the second opening is configured to receive another elongated member, such as a second pipe member.
In another aspect, the present invention provides another enclosure for a pipe portion. The enclosure includes a first member having a circumferal portion surrounding at least a portion of an axis of the enclosure. The first member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure also includes a second member having a circumferal portion surrounding at least a portion of an axis of the enclosure.
The second member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure further includes a third member having a circumferal portion surrounding at least a portion of an axis of the enclosure. The third member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. The enclosure further includes a fourth member having a circumferal portion surrounding at least a portion of an axis of the enclosure The fourth member also includes a first and second lateral portion extending from sides of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure. A first hinge member is provided for connecting the first and second member thereby providing rotational movement of the first member with respect to the second member. A second hinge member is provided for connecting the second and third member thereby providing rotational movement of the second member with respect to the third member. A third hinge member is provided for connecting the third and fourth member thereby providing rotational movement of the third member with respect to the fourth member. The first, second, third and fourth members are moveable to form an enclosure which is capable of movement between an open position and a closed position, wherein the enclosure defines at least one opening for allowing a member to extend from within and/or through the enclosure.
It should be appreciated that the above referenced aspects and examples are non-limiting as other exists with the present invention as shown and described herein. Still further, it should be appreciated that the above referenced aspects and examples of the invention may be combined to form other unique configurations, as demonstrated in the drawings, or otherwise.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 illustrates a perspective view of one embodiment of an enclosure of the present invention enclosing a junction between two pipe members.
Fig. 2 illustrates a perspective view of another embodiment of an enclosure of the present invention in an open position.
Fig. 3 illustrates a perspective view of the embodiment shown in Fig. 2 in a partial open position.
Fig. 4 illustrates a perspective view of the embodiment shown in Fig. 2 in a closed position.
Fig. 5 illustrates a side elevational view of the embodiment shown in Fig. 2 in an open position.
Fig. 6 illustrates a side elevational view of the embodiment shown in Fig. 2 in a closed position.
Fig. 7 illustrates a front view of the embodiment shown in Fig. 2.
Fig. 8 illustrates a top view of the embodiment shown in Fig. 2.
Fig. 9 illustrates a top view of an enclosure of the present invention during forming of the same.
DETAILED DESCRIPTION
The present invention provides enclosures and methods of forming the same 1o for protecting underground conduits and fixtures extending therefrom from damages resulting from attempted utility repairs, material corrosion, shifting earth or otherwise.
In one aspect, this protection is in the form of an enclosure having a plurality of members adapted to enclose one or more conduits (such as pipe portions) and attached fixture (such as a valve). The enclosure is adapted to move from an open position to a closed position. Preferably, the plurality of members are hingedly attached to guide the enclosure between the open and closed position.
The enclosure provides a barrier between the surrounding environment (e.g., earth, moisture, ultraviolet rays or otherwise) and one or more pipe portions and fixture. Preferably, the enclosure provides a cavity between the enclosed pipe portions and fixture and the surrounding environment. Accordingly, in one aspect of the present invention, a protective agent may fill all of a portion of the cavity. This protective agent may include an anti-corrosion agent to provide corrosion protection to the pipe portions and fixture located therein.
In application, the enclosure may be used with most conduit systems which may or may not have features or branches extending therefrom. However, an advantageous application is in the in the utility supply sector (e.g., gas, water, telephone, electricity, cable television or otherwise). A still more advantageous application may be in the delivery of natural gas to homes, businesses and the like using a network of underground natural gas pipes, wherein a fixture or otherwise is used to connect the homes, businesses to a main gas supply network.
In any of the above applications, or otherwise, the present invention is particularly useful in conjunction with keyholes or typical holes used for accessing underground pipe portions and fixtures. As previously discussed, keyhole forming comprises the accessing of underground components for modification, repair or otherwise. This includes forming a substantially vertical hole, typically formed in a ground surface, for accessing the desired pipe portion. For example, a circular hole may be created having a diameter less than about one half meter with substantially vertical walls. Similarly, square or rectangular holes may also be formed having substantially vertical walls. It should be appreciated that the hole may be sized to minimize disturbance to the surrounding area. This minimized size often makes it difficult for a person to enter the keyhole to access these pipe portions without the use of tools. As such, the enclosure of the present invention is adapted to be placed into the above-mentioned keyholes and manipulated to enclose one or more pipe portions and fixtures attached thereto.
Lowering and placement of the enclosure about the pipe portion and fixture may be achieved with the assistance of keyhole tools. By example, these tools may include clasping components, manipulating components or otherwise, which are suitable for raising, lowering, and manipulating components of the enclosure to depths of six or more feet.
Optionally, before, during or after enclosure of a pipe portion and fixture, any resulting cavity located between pipe portions fixture and the enclosure may be filled with a protective agent to provide corrosion protection to the enclosed components.
Alternatively, or in conjunction therewith, a protective wrap or material may be placed on the pipe portion and/or fixture.
While the following description recites pipe portions and fixtures attached thereto, it should be appreciated that the enclosure of the present invention may be used with other types of elongated conduits and attached features as discussed herein. By example, other fixtures may include valves, joints, fittings, connectors, metering devices, combinations thereof or otherwise.
As enclosures of the present invention are configured to enclose one or more members it is contemplated that the enclosure moves between an open and closed position for receiving and enclosing such members. In one preferred configuration, the enclosure is capable of flexibly moving between an open position and a closed position. This flexible movement may include elastic deformation for allowing the enclosure to reside in a first relaxed state (e.g. open or closed position) and reside in a second stressed state (e.g. the other of said open or closed position). This flexible movement may alternatively include plastic deformation for allowing the enclosure to reside in a first relaxed state and a second relaxed state were no external force is require to maintain the enclosure in the position. Still further, the flexible movement may include a combination of elastic and plastic deformation. However, in one preferred configuration, the enclosure resides in a relaxed state while in a closed position such that upon release of the enclosure from an open position or otherwise the enclosure surrounds and substantially encloses the components therein (e.g.
pipes, valves, etc.) without the additional of external forces.
The enclosure includes a first opening extending through at least a portion of the enclosure for receiving an elongated member, such as a pipe portion. In one preferred configuration, the first opening extends entirely through the enclosure for allowing the elongated member to extend uninterruptedly through the enclosure, while still providing protection to the enclosed portion of the elongated member.
Optionally, the enclosure may be further configured with a second opening extending through at least a portion of the enclosure. In one configuration, the second opening extends through one side of the enclosure for allowing a second elongated member to extend from the first elongated member. This is particularly advantageous with joining pipe members wherein the pipe member extending through the second opening is fluidly connected to the pipe member extending through the first member, such as through a fixture (e.g. valve or otherwise).
One particular advantageous feature of the present invention is the ability to form the enclosure of the present invention into or from a unitary structure.
More specifically, the enclosure of the present invention may be formed from a single member and more particularly a single sheet of formed material. In this configuration a sheet of preferred material may be formed, cut and shaped to a preferred configuration. After forming, the enclosure is formed of a unitary integrally formed structure configured to flexibly move between an open and closed position for receiving a pipe portion.
Referring to the drawings, one configuration of the enclosure 10 of the present invention is shown. The enclosure generally includes one or more and preferably a plurality of members 12 configured to form the enclosure of the present invention.
The one or more members are configured to elastically deform, plastically deform or both, to allow the enclosure to move between an open position and a closed position.
The enclosure includes a circumferal surface 14 generally formed about an axis (e.g.
the peripheral portion) and lateral surfaces 16 located adjacent to the circumferal 1o surface 14. The combination of the circumferal surface and lateral surface are configured to substantially form the enclosure of the present invention.
In the configurations shown, the enclosure is configured to enclose a portion of a first pipe portion 18 (such as a main pipe) and optionally a portion of a second pipe portion 20 (such as a branch extending from the main pipe). The first and second pipe portions may be joined through a fixture, such as a valve 21.
Accordingly, it is contemplated that the lateral side portions 16 may form a first opening 22 for receiving the first pipe portion 20 and the circumferal portion may include a second opening 24 for receiving the second pipe portion.
In a preferred configuration, the one or more of the members are flexible attached or formed to allow for opening and closing of the enclosure.
Preferably, the one or more members are hingedly attached, via a hinge 26, to allow for flexible movement. In the specific configuration shown, the members flexibly attached through a living hinge.
In any of the configurations discussed herein, it is contemplated that the one or more members 12 forming the enclosure may include an outer circumferal portion 28 which acts to surround a first pipe portion 18, particularly an axis of the pipe portion. When the enclosure is in a closed position it is contemplated that one or more of the members may overlap to provide increased rigidity to the enclosure, improved enclosure, or otherwise. It is also contemplated that each of the one or more members 12 may include one or more lateral side portions 30 extending from the outer circumferal portions. The lateral side portions of the one or more members act to form the lateral surface 16 of the enclosure. In this configuration, the combination of the outer circumferal portions and lateral side portions act to form the enclosure for the one or more pipe portions and fixtures located within the enclosure.
The circumferal portions 28 extend about the enclosure to form the circumferal surface 14 of the enclosure. The circumferal portions may be square and/or rectangular in shape, though other configurations are available. In the configurations shown, the circumferal portions include a flat surface. However, it is also contemplated that other surface configurations are available such as arcuate surfaces or combinations of flat and arcuate surfaces or otherwise. In view of the 1o foregoing, it is contemplated that the circumferal surface of the enclosure may be formed of a plurality of flat surfaces, combinations of flat and arcuate surfaces, or a continuous arcuate surface such to form a circular surface, elliptical surface, or otherwise.
It is contemplated that the enclosure may include one or more circumferal portions to form the circumferal surfaces of the enclosure. For example, it is contemplate that the enclosure may include 1, 2, 3, 4, 5, 6, 7, 8 or more circumferal portions. It is also contemplated that one or more of the circumferal portions may be in an overlapping relationship. However, in one preferred configuration, the number of circumferal portions is equal to the number of members.
As previously mentioned, it is contemplated that the circumferal surface may include one or more openings 24 for receiving a pipe portion. The openings may be formed through one or both sides of the enclosure depending upon whether the pipe portion is to extend through the entire enclosure. In extending through one side of the enclosure, it is contemplated that the opening may be formed in one or more circumferal portions. For example, in configurations where circumferal portions are in an overlapping relationship, it is contemplated that the opening may be formed through and by the overlapping circumferal portions. In a specific example, referring to Fig. 1, the opening is formed through overlapping circumferal portions.
Each of the overlapping circumferal portions is formed with a groove 32 or the like for allowing a pipe portion to move through the groove and into the opening. Preferably, the grooved portion of the overlapping circumferal portions extends in opposite directions. In this configuration, the opposing circumferal portions are brought together until the pipe portion resides in the opening formed by the overlapping circumferal portions. As should be appreciated, the overlapping circumferal portions each form a portion of the opening. Accordingly, the final shape of the opening may not be formed until the overlapping circumferal portions are fully brought together.
Optionally, the enclosure may include an attachment or retaining feature for maintaining the enclosure in a closed position. It is also contemplated that the enclosure may include an attachment or retaining feature for maintaining the pipe portion within a formed opening or maintaining the shape of the opening. These 1o configurations may be particularly advantageous in assisting in limiting the amount of anti-corrosion fluids from exiting the enclosure. By forming first and second openings having a similar diameter to that of the pipe portions extending therethrough the amount of fluid escaping the enclosure may be reduced.
Examples of suitable attachment or retaining features include snap fits, hook and latch configuration, mechanical fasteners, adhesives, friction fit, or otherwise. In one preferred configuration, Referring to Fig. 1, the attachment feature 34 comprises a snap fitting adapted to engage a pipe portion located within the opening. In this configuration, the attachment feature is located on one of a pair of overlapping circumferal portions and extend inwardly from groove portion 32 formed in the circumferal portion. The attachment feature includes one or more fingers 36 for engaging the pipe portion. Preferably, the one or more fingers form an opening smaller than a pipe portion residing within the opening but are elastically deformable to allow one direction passage of the pipe portion. The one or more fingers are orientated towards the opening to only allow for entry of the pipe portion into the opening. It should be appreciated that the attachment feature may be located on both of the overlapping circumeral portions.
The enclosure further includes lateral side portions 30 which preferably extend from the circumferal portions. The lateral side portions may extend from one or both sides of the circumferal portions. However, in one preferred configuration, the lateral side portions extend from both sides of one or more (or even all) of the circumferal portions. In any configuration, preferably the combination of lateral side portions extending from the circumferal portions of the enclosure form a suitable lateral surface of the enclosure for enclosing the one or more pipe portions.
One or more of the lateral side portions may be abutingly joined or in an overlapping relationship. Such an overlapping relationship may be particularly useful in improving the structural integrity of the enclosure, preventing corrosion agents from exiting the enclosure, combination thereof or otherwise.
The number of lateral side portions for each side of the enclosure may include 1, 2, 3, 4, 5, 6, 7, 8 or more lateral portions. However, in one preferred configuration the number of lateral side portions for each side of the enclosure is equal to the 1o number of circumferal surfaces of the enclosure. For example, with an enclosure that is box like in shape it is contemplated that there exists four lateral side portions per side of the enclosure that may join to form the lateral surface of the enclosure.
The lateral side portions may include any of the surface shapes of the circumferal portions including flat, arcuate, contoured, combinations thereof or otherwise. The lateral sides may form a continuous surface with the circumferal portion, such as a continuous arcuate surface, or it may be distinct, such as a flat surface extending in a non-parallel direction (e.g. about 90 or otherwise) with respect to the surface of the circumferal portion.
As with the circumferal portion, it is contemplated that the lateral side portions may include or form an opening extending through one or both sides of the enclosure. The opening may be formed by one or more, plurality, or even all of the lateral side portions. It is contemplated that when more than one lateral side portions forms the opening that the opening may not be in its final form (or fully developed) until the enclosure is in the closed position.
The shape of the openings formed in the circumferal portion and lateral side portions may comprise any suitable shape for the elongated member extending therethrough including geometric or non-geometric shapes. For example, suitable opening shapes include circular, oval or elliptical, square, rectangular, triangular or otherwise. Preferably, the shape of the opening corresponds to the exterior shape of the elongated member extending therethrough. With applications directed towards enclosing one or more pipe portions, it is contemplated that the shapes of the openings may be circular. Also, it is contemplated that the diameter of the openings may be substantially similar to the diameter of the elongated member extending therethrough. It is contemplated that the diameter of the first opening is larger than the second opening since the first opening may be configured for receiving a main pipe portion and the second opening may be configured for receiving a branch thereof. It is contemplated that the diameter of the first or second opening may be any common pipe diameter used in the natural gas industry. In one non-limiting specific example, it is contemplated that the diameter of the first opening is about 2.25 inches and the diameter of the second opening is about 1 inch.
Optionally, the circumferal side portions and/or lateral side portions forming the first and second openings, or otherwise, may further define a sealing lip about the opening for engaging the enclosure with the elongated member extending therethrough (e.g. pipe portion or otherwise). Optionally, the lip may extend away (or inwardly) from the circumferal or lateral surface to increase the contact surface with the elongated member for improving sealing therebetween. The enclosure (e.g.
sealing lip or otherwise) may include a sealing material (such as a gasket, sealant, adhesive or otherwise) for improving the seal between the enclosure and the elongated member extending therethrough.
As previously mentioned, the members 12 including the circumferal portions 2o and lateral side portions are attached to each other. Preferably, one or more (or even all) of the members are flexibly attached to each other, which may include plastic or elastic deformation to cause movement of the members with respect to each other. It is contemplated that the enclosure may be configured to reside in a first position in a relaxed state and flexibly move to a second position through the one or more flexible hinge portions. In such a configuration, it may be desirable for the enclosure to reside in a closed position when the enclosure is in the relaxed state and flexibly move to an open position and tensioned second state. Accordingly, upon release of from the second open state the portions or members of the enclosure returns to a closed position to form an enclosure suitable for enveloping or enclosing one or more pipe portions and fixtures attached thereto.
As previously mentioned, any two of the members of the enclosure may be flexibly attached for allowing the enclosure to move between an open position and a closed position. In one preferred configuration, movement through the hinge configuration provides for repetitive movement between the open position and the closed position without substantial deformation or destruction of the integrity of the enclosure. In another preferred configuration, the hinge configuration allows the enclosure to elastically deform to an open position and return to a closed position without substantial plastic deformation of the enclosure.
Such flexible attachment may be through any suitable hinge configuration for allowing the enclosure to move between an open and closed position. Suitable hinges includes living hinges, frictionless hinges, piano-type hinges, pin or pinless hinges, butt hinges, barrel hinge, concealed hinges, blum hinges, gate hinges, continuous hinges, piano hinges, spring hinges, hager hinges, weld on hinge, concealed hinge, strap hinge, pivot hinges, amerock hinges, flat hinges, slip hinges or otherwise. However, in one preferred configuration, the hinge comprises a living hinge integrally formed with members and other components of the enclosure.
Such living hinge configurations are suitable for allowing repetitive movement between the open and closed position with little to no appreciable plastic deformation of the hinge portion. However, it is also contemplated that plastic deformation may 2o also be provided by the living hinge such that upon movement to either or both of the open or closed position the enclosure remains in that position.
Similarly, it is contemplated that attachment of the circumferal portions to the lateral side portions may also be through any of the configurations discussed above with respect to the attachment of the members 12. However, in one preferred configuration, the attachment of the circumferal portions and lateral side portions are flexibly attached through a living hinge.
The enclosure may be further configured with one or more fluid openings 38 for receiving fluid, particularly an anti-corrosion agent 39, within the enclosure. The one or more fluid openings may be located or formed on a circumferal portion, lateral side portion or both. However, in one preferred configuration, the one or more fluid opening are formed on a top circumferal portion of the enclosure. This allows material to be pumped or otherwise placed into the enclosure after installation of the enclosure onto a pipe portion or otherwise. This is particularly advantageous when the enclosure is used on pipe portions located within a hole, such as a keyhole or typical hole.
Optionally, the enclosure includes a suitable fluid connector 40 associated with the fluid openings for receiving corrosion preventing material within the system. It is contemplated that the connector is configured to matingly link (via threaded attachment, snap fit or otherwise) with a suitable delivery means for the introduction of material into the enclosure. As previously mentioned, preferably the material 1o comprises characteristics which assist in preventing corrosion of a pipe portion and fixture.
Suitable materials that may be used to coat and protect the pipe portions and fixture include hydrophobic materials. Preferably, the material is adapted to displace water from a pipe portion and/or form a substantial seal between the pipe portion and the surrounding environment. A preferred material has a material viscosity such that is adheres to pipe portion and fixture but is still flowable to allow the material to fill the cavity, wherein the cavity having the material is substantially free of voids.
However, the material may be pourable material at a first temperature and be substantially solidified at a lower second temp. By example, the material may comprise or otherwise include wax.
Another suitable material includes petroleum or a petroleum byproduct, optionally; the petroleum product includes a wax. Suitable generic petroleum products include oils, grease or other lubrication type products. More specific examples of suitable material include petroleum, wax-based product sold by Trenton Corporation of Ann Arbor, Michigan under the trade names Graycoat, Temcoat and Fill Coat No. 6. However, one preferred agent is petroleum, wax-based product sold by Trenton Corporation of Ann Arbor, Michigan under the trade name Wax-Tape Primer. The Wax-Tape Primer advantageously adheres to pipe portions and fixtures but still remains pourable or is otherwise capable of filling the cavity leaving little to no voids or air pockets.
Other examples of a suitable materials and delivery methods thereof which may be used in conjunction with the present invention can be found in commonly owned U.S. Patent No. 4,469,469 herein incorporated by reference.
The strength and rigidity of the enclosure may vary depending on the surrounding conditions. However, preferably the enclosure is configured to resist forces encountered in during underground utility applications (e.g., pressure due to applied layers of dirt placed there upon, jarring force due to excavating machines or hydro-forming tools, internal pressures originating from an enclosed pipe, erosion or movement of surrounding dirt or rock or otherwise). Accordingly, the enclosure may be rigid or semi-rigid to provide such benefits or otherwise. In a preferred embodiment, the enclosure is rigid but flexible and can resist the above-mentioned forces without failure or substantial deformation such that the integrity of the pipe portions and fixture are substantially not compromised.
Suitable materials contemplated for the present enclosure includes metals, plastics, rubber or otherwise. Preferred material includes materials that are substantially resistance to sparks, corrosion, combinations thereof or otherwise.
Other preferred material includes a rigid material, which is both spark and corrosion resistant. Optionally, the material of the enclosure may include reinforcing material, such as glass fibers or otherwise.
In one preferred configuration, the enclosure is formed of a transparent or semi-transparent material which allows the contents to be viewed, particularly during filing of the enclosure with anti-corrosion agents. However, optionally, all or part of the enclosure may be configured with a marking or identification insignia (such as a color or otherwise), which assists in identification or discovery of the enclosure within a keyhole or otherwise. Marking or identification insignia may be formed with the components of the enclosure or maybe subsequently attached thereto.
Accordingly, this would provide a means for distinguishing the enclosure from the surrounding environment. Furthermore, this will help prevent damage to the enclosure, pipe portions and valve located therein during excavating. Preferably the color of the enclosure is distinguishable from the surrounding environment. Preferred colors of the present enclosure include bright or florescent colors. Examples of such colors include: yellow, green, blue, orange, red, white, black, combinations thereof or otherwise.
Also, it is contemplated that one or more additional layers may be applied to the enclosure to enhance the performance of the enclosure. Such additional layers may include spark resistance materials, anticorrosion materials, adhesives, reinforcing materials, pigmentation or otherwise. It should be appreciated that the additional layer may include or comprise an identifying color as described herein.
The enclosure may be manufactured using common forming techniques such as molding, casting, stamping or otherwise. One preferred method of manufacturing includes molding (such as extrusion, blow molding, rotational molding, injection molding, or otherwise) of the enclosure. The enclosure may be formed using suitable forming techniques for forming the members of the enclosure and may be dependent upon the material forming the enclosure.
In one preferred configuration, as shown in Fig. 9, the enclosure may be integrally formed from a single material to form a unitary structure. For example, the enclosure may be formed from a single sheet of plastic material. The single sheet of material may be formed and/or shaped to form the enclosure. For example, the sheet may be segmented into the members forming the enclosure wherein each member is attached to each other through the material. Each member includes an outer circumferal portion and lateral side portions extending therefrom. In a preferred configuration, the lateral side portions are plastically deformed to become generally perpendicular to the circumferal portion. Also, each of the attached outer circumferal portions are also plastically deformed with respect to each other to become generally perpendicular, or otherwise, to an adjacent circumferal portion. Accordingly, in one configuration it is contemplated that each of the outer circumferal portion reside approximately perpendicular to an adjacent outer circumferal portion and each of the lateral side portion reside generally parallel with respect to each other. As should be appreciated, in applications with four or more members a box enclosure may be formed.
The enclosure may be formed of any suitable shape for enclosing one more pipe portions. In one preferred configuration, the enclosure forms a box enclosure having four outer circufural sides and two lateral sides. However, it should be appreciated that more or less outer circumferal sides may be formed including 3, 4, 5, 6, or more sides.
The outer circumferal sides and lateral sides may be formed of substantially flat. However, it is further contemplated that one or more of the outer circuferal sides and/or lateral sides may be arcuate in shape. Also, the outer circuferal sides or lateral sides of the enclosure may include one or more contours for improving rigidity to the enclosure or other advantageous feature. Such contours may include ribs, grooves, lips or otherwise.
The enclosure forms a cavity having suitable volume for receiving the first and 1o second pipe portions and fixture attached thereto. In one preferred configuration, the shape and volume of the enclosure is suitable for also receiving a valve for connecting the first and second pipe portions. It is contemplated that the volume of the cavity is between about 1000 to 5000 cm3, or between about 2000 to 3000 cm3, or between about 2500 to 3000 cm3, or even about 2750 cm3. It should be appreciated that larger or smaller volumes are available.
The material thickness of the enclosure may be consistent throughout the enclosure or may vary. In one configuration the thickness of the member is substantially consistent throughout the enclosure. In this configuration, preferably the thickness of the enclosure is suitable for maintaining a generally rigid structure while still allowing flexibility between the members. In one preferred configuration, the flexibility between the members is such that the enclosure can be flexibly opened to receive a pipe portion without appreciable plastic deformation of the enclosure, particularly the hinge portions of the enclosure, as described herein.
Examples of suitable thickness of the material forming the enclosure are in the range of about 0.25 mm to 7.5 mm, or in the range of about 0.50 mm to 5 mm, or in the range of about 0.75 mm to 3 mm, or in the range of about 1.0 mm to 2.0 mm.
In one configuration the thickness of the enclosure is about 1.5 mm.
Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. Plural structural components can be provided by a single integrated structure. Alternatively, a single integrated structure might be divided into separate plural components. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention.
The preferred embodiment of the present invention has been disclosed. A
person of ordinary skill in the art would realize however, that certain modifications would come within the teachings of this invention. Therefore, the following claims lo should be studied to determine the true scope and content of the invention.
Fig. 7 illustrates a front view of the embodiment shown in Fig. 2.
Fig. 8 illustrates a top view of the embodiment shown in Fig. 2.
Fig. 9 illustrates a top view of an enclosure of the present invention during forming of the same.
DETAILED DESCRIPTION
The present invention provides enclosures and methods of forming the same 1o for protecting underground conduits and fixtures extending therefrom from damages resulting from attempted utility repairs, material corrosion, shifting earth or otherwise.
In one aspect, this protection is in the form of an enclosure having a plurality of members adapted to enclose one or more conduits (such as pipe portions) and attached fixture (such as a valve). The enclosure is adapted to move from an open position to a closed position. Preferably, the plurality of members are hingedly attached to guide the enclosure between the open and closed position.
The enclosure provides a barrier between the surrounding environment (e.g., earth, moisture, ultraviolet rays or otherwise) and one or more pipe portions and fixture. Preferably, the enclosure provides a cavity between the enclosed pipe portions and fixture and the surrounding environment. Accordingly, in one aspect of the present invention, a protective agent may fill all of a portion of the cavity. This protective agent may include an anti-corrosion agent to provide corrosion protection to the pipe portions and fixture located therein.
In application, the enclosure may be used with most conduit systems which may or may not have features or branches extending therefrom. However, an advantageous application is in the in the utility supply sector (e.g., gas, water, telephone, electricity, cable television or otherwise). A still more advantageous application may be in the delivery of natural gas to homes, businesses and the like using a network of underground natural gas pipes, wherein a fixture or otherwise is used to connect the homes, businesses to a main gas supply network.
In any of the above applications, or otherwise, the present invention is particularly useful in conjunction with keyholes or typical holes used for accessing underground pipe portions and fixtures. As previously discussed, keyhole forming comprises the accessing of underground components for modification, repair or otherwise. This includes forming a substantially vertical hole, typically formed in a ground surface, for accessing the desired pipe portion. For example, a circular hole may be created having a diameter less than about one half meter with substantially vertical walls. Similarly, square or rectangular holes may also be formed having substantially vertical walls. It should be appreciated that the hole may be sized to minimize disturbance to the surrounding area. This minimized size often makes it difficult for a person to enter the keyhole to access these pipe portions without the use of tools. As such, the enclosure of the present invention is adapted to be placed into the above-mentioned keyholes and manipulated to enclose one or more pipe portions and fixtures attached thereto.
Lowering and placement of the enclosure about the pipe portion and fixture may be achieved with the assistance of keyhole tools. By example, these tools may include clasping components, manipulating components or otherwise, which are suitable for raising, lowering, and manipulating components of the enclosure to depths of six or more feet.
Optionally, before, during or after enclosure of a pipe portion and fixture, any resulting cavity located between pipe portions fixture and the enclosure may be filled with a protective agent to provide corrosion protection to the enclosed components.
Alternatively, or in conjunction therewith, a protective wrap or material may be placed on the pipe portion and/or fixture.
While the following description recites pipe portions and fixtures attached thereto, it should be appreciated that the enclosure of the present invention may be used with other types of elongated conduits and attached features as discussed herein. By example, other fixtures may include valves, joints, fittings, connectors, metering devices, combinations thereof or otherwise.
As enclosures of the present invention are configured to enclose one or more members it is contemplated that the enclosure moves between an open and closed position for receiving and enclosing such members. In one preferred configuration, the enclosure is capable of flexibly moving between an open position and a closed position. This flexible movement may include elastic deformation for allowing the enclosure to reside in a first relaxed state (e.g. open or closed position) and reside in a second stressed state (e.g. the other of said open or closed position). This flexible movement may alternatively include plastic deformation for allowing the enclosure to reside in a first relaxed state and a second relaxed state were no external force is require to maintain the enclosure in the position. Still further, the flexible movement may include a combination of elastic and plastic deformation. However, in one preferred configuration, the enclosure resides in a relaxed state while in a closed position such that upon release of the enclosure from an open position or otherwise the enclosure surrounds and substantially encloses the components therein (e.g.
pipes, valves, etc.) without the additional of external forces.
The enclosure includes a first opening extending through at least a portion of the enclosure for receiving an elongated member, such as a pipe portion. In one preferred configuration, the first opening extends entirely through the enclosure for allowing the elongated member to extend uninterruptedly through the enclosure, while still providing protection to the enclosed portion of the elongated member.
Optionally, the enclosure may be further configured with a second opening extending through at least a portion of the enclosure. In one configuration, the second opening extends through one side of the enclosure for allowing a second elongated member to extend from the first elongated member. This is particularly advantageous with joining pipe members wherein the pipe member extending through the second opening is fluidly connected to the pipe member extending through the first member, such as through a fixture (e.g. valve or otherwise).
One particular advantageous feature of the present invention is the ability to form the enclosure of the present invention into or from a unitary structure.
More specifically, the enclosure of the present invention may be formed from a single member and more particularly a single sheet of formed material. In this configuration a sheet of preferred material may be formed, cut and shaped to a preferred configuration. After forming, the enclosure is formed of a unitary integrally formed structure configured to flexibly move between an open and closed position for receiving a pipe portion.
Referring to the drawings, one configuration of the enclosure 10 of the present invention is shown. The enclosure generally includes one or more and preferably a plurality of members 12 configured to form the enclosure of the present invention.
The one or more members are configured to elastically deform, plastically deform or both, to allow the enclosure to move between an open position and a closed position.
The enclosure includes a circumferal surface 14 generally formed about an axis (e.g.
the peripheral portion) and lateral surfaces 16 located adjacent to the circumferal 1o surface 14. The combination of the circumferal surface and lateral surface are configured to substantially form the enclosure of the present invention.
In the configurations shown, the enclosure is configured to enclose a portion of a first pipe portion 18 (such as a main pipe) and optionally a portion of a second pipe portion 20 (such as a branch extending from the main pipe). The first and second pipe portions may be joined through a fixture, such as a valve 21.
Accordingly, it is contemplated that the lateral side portions 16 may form a first opening 22 for receiving the first pipe portion 20 and the circumferal portion may include a second opening 24 for receiving the second pipe portion.
In a preferred configuration, the one or more of the members are flexible attached or formed to allow for opening and closing of the enclosure.
Preferably, the one or more members are hingedly attached, via a hinge 26, to allow for flexible movement. In the specific configuration shown, the members flexibly attached through a living hinge.
In any of the configurations discussed herein, it is contemplated that the one or more members 12 forming the enclosure may include an outer circumferal portion 28 which acts to surround a first pipe portion 18, particularly an axis of the pipe portion. When the enclosure is in a closed position it is contemplated that one or more of the members may overlap to provide increased rigidity to the enclosure, improved enclosure, or otherwise. It is also contemplated that each of the one or more members 12 may include one or more lateral side portions 30 extending from the outer circumferal portions. The lateral side portions of the one or more members act to form the lateral surface 16 of the enclosure. In this configuration, the combination of the outer circumferal portions and lateral side portions act to form the enclosure for the one or more pipe portions and fixtures located within the enclosure.
The circumferal portions 28 extend about the enclosure to form the circumferal surface 14 of the enclosure. The circumferal portions may be square and/or rectangular in shape, though other configurations are available. In the configurations shown, the circumferal portions include a flat surface. However, it is also contemplated that other surface configurations are available such as arcuate surfaces or combinations of flat and arcuate surfaces or otherwise. In view of the 1o foregoing, it is contemplated that the circumferal surface of the enclosure may be formed of a plurality of flat surfaces, combinations of flat and arcuate surfaces, or a continuous arcuate surface such to form a circular surface, elliptical surface, or otherwise.
It is contemplated that the enclosure may include one or more circumferal portions to form the circumferal surfaces of the enclosure. For example, it is contemplate that the enclosure may include 1, 2, 3, 4, 5, 6, 7, 8 or more circumferal portions. It is also contemplated that one or more of the circumferal portions may be in an overlapping relationship. However, in one preferred configuration, the number of circumferal portions is equal to the number of members.
As previously mentioned, it is contemplated that the circumferal surface may include one or more openings 24 for receiving a pipe portion. The openings may be formed through one or both sides of the enclosure depending upon whether the pipe portion is to extend through the entire enclosure. In extending through one side of the enclosure, it is contemplated that the opening may be formed in one or more circumferal portions. For example, in configurations where circumferal portions are in an overlapping relationship, it is contemplated that the opening may be formed through and by the overlapping circumferal portions. In a specific example, referring to Fig. 1, the opening is formed through overlapping circumferal portions.
Each of the overlapping circumferal portions is formed with a groove 32 or the like for allowing a pipe portion to move through the groove and into the opening. Preferably, the grooved portion of the overlapping circumferal portions extends in opposite directions. In this configuration, the opposing circumferal portions are brought together until the pipe portion resides in the opening formed by the overlapping circumferal portions. As should be appreciated, the overlapping circumferal portions each form a portion of the opening. Accordingly, the final shape of the opening may not be formed until the overlapping circumferal portions are fully brought together.
Optionally, the enclosure may include an attachment or retaining feature for maintaining the enclosure in a closed position. It is also contemplated that the enclosure may include an attachment or retaining feature for maintaining the pipe portion within a formed opening or maintaining the shape of the opening. These 1o configurations may be particularly advantageous in assisting in limiting the amount of anti-corrosion fluids from exiting the enclosure. By forming first and second openings having a similar diameter to that of the pipe portions extending therethrough the amount of fluid escaping the enclosure may be reduced.
Examples of suitable attachment or retaining features include snap fits, hook and latch configuration, mechanical fasteners, adhesives, friction fit, or otherwise. In one preferred configuration, Referring to Fig. 1, the attachment feature 34 comprises a snap fitting adapted to engage a pipe portion located within the opening. In this configuration, the attachment feature is located on one of a pair of overlapping circumferal portions and extend inwardly from groove portion 32 formed in the circumferal portion. The attachment feature includes one or more fingers 36 for engaging the pipe portion. Preferably, the one or more fingers form an opening smaller than a pipe portion residing within the opening but are elastically deformable to allow one direction passage of the pipe portion. The one or more fingers are orientated towards the opening to only allow for entry of the pipe portion into the opening. It should be appreciated that the attachment feature may be located on both of the overlapping circumeral portions.
The enclosure further includes lateral side portions 30 which preferably extend from the circumferal portions. The lateral side portions may extend from one or both sides of the circumferal portions. However, in one preferred configuration, the lateral side portions extend from both sides of one or more (or even all) of the circumferal portions. In any configuration, preferably the combination of lateral side portions extending from the circumferal portions of the enclosure form a suitable lateral surface of the enclosure for enclosing the one or more pipe portions.
One or more of the lateral side portions may be abutingly joined or in an overlapping relationship. Such an overlapping relationship may be particularly useful in improving the structural integrity of the enclosure, preventing corrosion agents from exiting the enclosure, combination thereof or otherwise.
The number of lateral side portions for each side of the enclosure may include 1, 2, 3, 4, 5, 6, 7, 8 or more lateral portions. However, in one preferred configuration the number of lateral side portions for each side of the enclosure is equal to the 1o number of circumferal surfaces of the enclosure. For example, with an enclosure that is box like in shape it is contemplated that there exists four lateral side portions per side of the enclosure that may join to form the lateral surface of the enclosure.
The lateral side portions may include any of the surface shapes of the circumferal portions including flat, arcuate, contoured, combinations thereof or otherwise. The lateral sides may form a continuous surface with the circumferal portion, such as a continuous arcuate surface, or it may be distinct, such as a flat surface extending in a non-parallel direction (e.g. about 90 or otherwise) with respect to the surface of the circumferal portion.
As with the circumferal portion, it is contemplated that the lateral side portions may include or form an opening extending through one or both sides of the enclosure. The opening may be formed by one or more, plurality, or even all of the lateral side portions. It is contemplated that when more than one lateral side portions forms the opening that the opening may not be in its final form (or fully developed) until the enclosure is in the closed position.
The shape of the openings formed in the circumferal portion and lateral side portions may comprise any suitable shape for the elongated member extending therethrough including geometric or non-geometric shapes. For example, suitable opening shapes include circular, oval or elliptical, square, rectangular, triangular or otherwise. Preferably, the shape of the opening corresponds to the exterior shape of the elongated member extending therethrough. With applications directed towards enclosing one or more pipe portions, it is contemplated that the shapes of the openings may be circular. Also, it is contemplated that the diameter of the openings may be substantially similar to the diameter of the elongated member extending therethrough. It is contemplated that the diameter of the first opening is larger than the second opening since the first opening may be configured for receiving a main pipe portion and the second opening may be configured for receiving a branch thereof. It is contemplated that the diameter of the first or second opening may be any common pipe diameter used in the natural gas industry. In one non-limiting specific example, it is contemplated that the diameter of the first opening is about 2.25 inches and the diameter of the second opening is about 1 inch.
Optionally, the circumferal side portions and/or lateral side portions forming the first and second openings, or otherwise, may further define a sealing lip about the opening for engaging the enclosure with the elongated member extending therethrough (e.g. pipe portion or otherwise). Optionally, the lip may extend away (or inwardly) from the circumferal or lateral surface to increase the contact surface with the elongated member for improving sealing therebetween. The enclosure (e.g.
sealing lip or otherwise) may include a sealing material (such as a gasket, sealant, adhesive or otherwise) for improving the seal between the enclosure and the elongated member extending therethrough.
As previously mentioned, the members 12 including the circumferal portions 2o and lateral side portions are attached to each other. Preferably, one or more (or even all) of the members are flexibly attached to each other, which may include plastic or elastic deformation to cause movement of the members with respect to each other. It is contemplated that the enclosure may be configured to reside in a first position in a relaxed state and flexibly move to a second position through the one or more flexible hinge portions. In such a configuration, it may be desirable for the enclosure to reside in a closed position when the enclosure is in the relaxed state and flexibly move to an open position and tensioned second state. Accordingly, upon release of from the second open state the portions or members of the enclosure returns to a closed position to form an enclosure suitable for enveloping or enclosing one or more pipe portions and fixtures attached thereto.
As previously mentioned, any two of the members of the enclosure may be flexibly attached for allowing the enclosure to move between an open position and a closed position. In one preferred configuration, movement through the hinge configuration provides for repetitive movement between the open position and the closed position without substantial deformation or destruction of the integrity of the enclosure. In another preferred configuration, the hinge configuration allows the enclosure to elastically deform to an open position and return to a closed position without substantial plastic deformation of the enclosure.
Such flexible attachment may be through any suitable hinge configuration for allowing the enclosure to move between an open and closed position. Suitable hinges includes living hinges, frictionless hinges, piano-type hinges, pin or pinless hinges, butt hinges, barrel hinge, concealed hinges, blum hinges, gate hinges, continuous hinges, piano hinges, spring hinges, hager hinges, weld on hinge, concealed hinge, strap hinge, pivot hinges, amerock hinges, flat hinges, slip hinges or otherwise. However, in one preferred configuration, the hinge comprises a living hinge integrally formed with members and other components of the enclosure.
Such living hinge configurations are suitable for allowing repetitive movement between the open and closed position with little to no appreciable plastic deformation of the hinge portion. However, it is also contemplated that plastic deformation may 2o also be provided by the living hinge such that upon movement to either or both of the open or closed position the enclosure remains in that position.
Similarly, it is contemplated that attachment of the circumferal portions to the lateral side portions may also be through any of the configurations discussed above with respect to the attachment of the members 12. However, in one preferred configuration, the attachment of the circumferal portions and lateral side portions are flexibly attached through a living hinge.
The enclosure may be further configured with one or more fluid openings 38 for receiving fluid, particularly an anti-corrosion agent 39, within the enclosure. The one or more fluid openings may be located or formed on a circumferal portion, lateral side portion or both. However, in one preferred configuration, the one or more fluid opening are formed on a top circumferal portion of the enclosure. This allows material to be pumped or otherwise placed into the enclosure after installation of the enclosure onto a pipe portion or otherwise. This is particularly advantageous when the enclosure is used on pipe portions located within a hole, such as a keyhole or typical hole.
Optionally, the enclosure includes a suitable fluid connector 40 associated with the fluid openings for receiving corrosion preventing material within the system. It is contemplated that the connector is configured to matingly link (via threaded attachment, snap fit or otherwise) with a suitable delivery means for the introduction of material into the enclosure. As previously mentioned, preferably the material 1o comprises characteristics which assist in preventing corrosion of a pipe portion and fixture.
Suitable materials that may be used to coat and protect the pipe portions and fixture include hydrophobic materials. Preferably, the material is adapted to displace water from a pipe portion and/or form a substantial seal between the pipe portion and the surrounding environment. A preferred material has a material viscosity such that is adheres to pipe portion and fixture but is still flowable to allow the material to fill the cavity, wherein the cavity having the material is substantially free of voids.
However, the material may be pourable material at a first temperature and be substantially solidified at a lower second temp. By example, the material may comprise or otherwise include wax.
Another suitable material includes petroleum or a petroleum byproduct, optionally; the petroleum product includes a wax. Suitable generic petroleum products include oils, grease or other lubrication type products. More specific examples of suitable material include petroleum, wax-based product sold by Trenton Corporation of Ann Arbor, Michigan under the trade names Graycoat, Temcoat and Fill Coat No. 6. However, one preferred agent is petroleum, wax-based product sold by Trenton Corporation of Ann Arbor, Michigan under the trade name Wax-Tape Primer. The Wax-Tape Primer advantageously adheres to pipe portions and fixtures but still remains pourable or is otherwise capable of filling the cavity leaving little to no voids or air pockets.
Other examples of a suitable materials and delivery methods thereof which may be used in conjunction with the present invention can be found in commonly owned U.S. Patent No. 4,469,469 herein incorporated by reference.
The strength and rigidity of the enclosure may vary depending on the surrounding conditions. However, preferably the enclosure is configured to resist forces encountered in during underground utility applications (e.g., pressure due to applied layers of dirt placed there upon, jarring force due to excavating machines or hydro-forming tools, internal pressures originating from an enclosed pipe, erosion or movement of surrounding dirt or rock or otherwise). Accordingly, the enclosure may be rigid or semi-rigid to provide such benefits or otherwise. In a preferred embodiment, the enclosure is rigid but flexible and can resist the above-mentioned forces without failure or substantial deformation such that the integrity of the pipe portions and fixture are substantially not compromised.
Suitable materials contemplated for the present enclosure includes metals, plastics, rubber or otherwise. Preferred material includes materials that are substantially resistance to sparks, corrosion, combinations thereof or otherwise.
Other preferred material includes a rigid material, which is both spark and corrosion resistant. Optionally, the material of the enclosure may include reinforcing material, such as glass fibers or otherwise.
In one preferred configuration, the enclosure is formed of a transparent or semi-transparent material which allows the contents to be viewed, particularly during filing of the enclosure with anti-corrosion agents. However, optionally, all or part of the enclosure may be configured with a marking or identification insignia (such as a color or otherwise), which assists in identification or discovery of the enclosure within a keyhole or otherwise. Marking or identification insignia may be formed with the components of the enclosure or maybe subsequently attached thereto.
Accordingly, this would provide a means for distinguishing the enclosure from the surrounding environment. Furthermore, this will help prevent damage to the enclosure, pipe portions and valve located therein during excavating. Preferably the color of the enclosure is distinguishable from the surrounding environment. Preferred colors of the present enclosure include bright or florescent colors. Examples of such colors include: yellow, green, blue, orange, red, white, black, combinations thereof or otherwise.
Also, it is contemplated that one or more additional layers may be applied to the enclosure to enhance the performance of the enclosure. Such additional layers may include spark resistance materials, anticorrosion materials, adhesives, reinforcing materials, pigmentation or otherwise. It should be appreciated that the additional layer may include or comprise an identifying color as described herein.
The enclosure may be manufactured using common forming techniques such as molding, casting, stamping or otherwise. One preferred method of manufacturing includes molding (such as extrusion, blow molding, rotational molding, injection molding, or otherwise) of the enclosure. The enclosure may be formed using suitable forming techniques for forming the members of the enclosure and may be dependent upon the material forming the enclosure.
In one preferred configuration, as shown in Fig. 9, the enclosure may be integrally formed from a single material to form a unitary structure. For example, the enclosure may be formed from a single sheet of plastic material. The single sheet of material may be formed and/or shaped to form the enclosure. For example, the sheet may be segmented into the members forming the enclosure wherein each member is attached to each other through the material. Each member includes an outer circumferal portion and lateral side portions extending therefrom. In a preferred configuration, the lateral side portions are plastically deformed to become generally perpendicular to the circumferal portion. Also, each of the attached outer circumferal portions are also plastically deformed with respect to each other to become generally perpendicular, or otherwise, to an adjacent circumferal portion. Accordingly, in one configuration it is contemplated that each of the outer circumferal portion reside approximately perpendicular to an adjacent outer circumferal portion and each of the lateral side portion reside generally parallel with respect to each other. As should be appreciated, in applications with four or more members a box enclosure may be formed.
The enclosure may be formed of any suitable shape for enclosing one more pipe portions. In one preferred configuration, the enclosure forms a box enclosure having four outer circufural sides and two lateral sides. However, it should be appreciated that more or less outer circumferal sides may be formed including 3, 4, 5, 6, or more sides.
The outer circumferal sides and lateral sides may be formed of substantially flat. However, it is further contemplated that one or more of the outer circuferal sides and/or lateral sides may be arcuate in shape. Also, the outer circuferal sides or lateral sides of the enclosure may include one or more contours for improving rigidity to the enclosure or other advantageous feature. Such contours may include ribs, grooves, lips or otherwise.
The enclosure forms a cavity having suitable volume for receiving the first and 1o second pipe portions and fixture attached thereto. In one preferred configuration, the shape and volume of the enclosure is suitable for also receiving a valve for connecting the first and second pipe portions. It is contemplated that the volume of the cavity is between about 1000 to 5000 cm3, or between about 2000 to 3000 cm3, or between about 2500 to 3000 cm3, or even about 2750 cm3. It should be appreciated that larger or smaller volumes are available.
The material thickness of the enclosure may be consistent throughout the enclosure or may vary. In one configuration the thickness of the member is substantially consistent throughout the enclosure. In this configuration, preferably the thickness of the enclosure is suitable for maintaining a generally rigid structure while still allowing flexibility between the members. In one preferred configuration, the flexibility between the members is such that the enclosure can be flexibly opened to receive a pipe portion without appreciable plastic deformation of the enclosure, particularly the hinge portions of the enclosure, as described herein.
Examples of suitable thickness of the material forming the enclosure are in the range of about 0.25 mm to 7.5 mm, or in the range of about 0.50 mm to 5 mm, or in the range of about 0.75 mm to 3 mm, or in the range of about 1.0 mm to 2.0 mm.
In one configuration the thickness of the enclosure is about 1.5 mm.
Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. Plural structural components can be provided by a single integrated structure. Alternatively, a single integrated structure might be divided into separate plural components. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention.
The preferred embodiment of the present invention has been disclosed. A
person of ordinary skill in the art would realize however, that certain modifications would come within the teachings of this invention. Therefore, the following claims lo should be studied to determine the true scope and content of the invention.
Claims (20)
1. A flexible enclosure for a pipe portion, the enclosure comprising:
A unitary structure forming a plurality of members continuously attached to each other, the plurality of members including a circumferal portion and lateral side portions extending from the circumferal portion, wherein each of the members are flexibly attached to each other through an integrally formed flexible hinge to move the enclosure between an open position and closed position to form a cavity adapted for receiving one or more pipe portions, wherein when the enclosure is in the closed position one or more of the lateral side portions define a first opening extending through the enclosure and one or more of the circumferal portions define a second opening extending through at least a portion of the enclosure.
A unitary structure forming a plurality of members continuously attached to each other, the plurality of members including a circumferal portion and lateral side portions extending from the circumferal portion, wherein each of the members are flexibly attached to each other through an integrally formed flexible hinge to move the enclosure between an open position and closed position to form a cavity adapted for receiving one or more pipe portions, wherein when the enclosure is in the closed position one or more of the lateral side portions define a first opening extending through the enclosure and one or more of the circumferal portions define a second opening extending through at least a portion of the enclosure.
2. The enclosure of claim 1, wherein the plurality of members includes a first member, second member, third member and fourth member, wherein each member includes a circumferal portion and lateral side portions extending from the sides of the circumferal portions.
3. The enclosure of claim 2, further comprising an end portion extending from one of the members, the end portion being flexibly attached to the member and including a circumferal portion in an overlapping relationship with a circumferal portion of one of the members.
4. The enclosure of claim 1, wherein the flexible hinge joining the members comprises a living hinge integrally formed with the enclosure.
5. The enclosure of claim 1, wherein the first opening is formed by the lateral side portions of the first, second, third and fourth members when the enclosure is in the closed position.
6. The enclosure of claim 5, wherein at least one of the lateral side portions are in an overlapping relationship with at least one other lateral side portion.
7. The enclosure of claim 6, wherein all of the lateral side portions are in an overlapping relationship with at least one other lateral side portion.
8. The enclosure of claim 3, wherein the second opening is formed by one of the circumferal portions and the end portion.
9. The enclosure of claim 8, wherein the circumferal portion, the end portion or both includes one or more retaining members for engaging a member extending through the second opening for assisting in maintaining member extending through the second opening within the second opening, or for assisting in maintaining the enclosure in a closed position, or bother.
10. The enclosure of claim 1, wherein the first opening and the second opening extends generally 90° with respect to one another.
11. The enclosure of claim 1, wherein the exterior portion of circumferal portions include a generally flat portion and wherein the exterior portion of the lateral side portions include a generally flat portion.
12. The enclosure of claim 11, wherein the lateral side portions are flexibly attached to the circumferal portion through a living hinge.
13. The enclosure of claim 1, wherein the enclosure defines a third opening formed in one of the circumferal portions of one of the members.
14. The enclosure of claim 13, wherein the enclosure includes a fluid connector surrounding at least a portion of the third opening for connection of a fluid delivery device for delivering fluid into the enclosure.
15. The enclosure of claim 1, wherein the enclosure includes an anti-corrosion agent located within the enclosure.
16. The enclosure of claim 15, wherein the anti-corrosion agent substantially fills voids located between any pipe member located within the enclosure and an interior surface of the enclosure.
17. The enclosure of claim 1, wherein the enclosure includes a substantially continuous thickness.
18. The enclosure of claim 17, wherein the thickness of the enclosure is between about 0.75 mm to 3 mm.
19. An enclosure for a pipe portion, the enclosure comprising:
a first member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the first member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a second member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the second member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a third member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the third member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a first hinge member connecting the first and second member and providing rotational movement of the first member with respect to the second member;
a second hinge member connecting the second and third member and providing rotational movement of the second member with respect to the third member;
wherein the first, second and third member are moveable to form an enclosure movable between an open position and a closed position, and wherein the enclosure defines at least one opening for allowing a member to extend from within the enclosure.
a first member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the first member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a second member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the second member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a third member including a circumferal portion surrounding at least a portion of an axis of the enclosure, the third member also including a first and second lateral portion extending from sides regions of the circumferal portion, wherein the circumferal portion and the first and second lateral portion form a portion of a cavity of the enclosure;
a first hinge member connecting the first and second member and providing rotational movement of the first member with respect to the second member;
a second hinge member connecting the second and third member and providing rotational movement of the second member with respect to the third member;
wherein the first, second and third member are moveable to form an enclosure movable between an open position and a closed position, and wherein the enclosure defines at least one opening for allowing a member to extend from within the enclosure.
20. A method of forming an enclosure for the protection of pipe portions, the method comprising the steps of:
i. forming a sheet of plastic material having a thickness between about 0.75 mm to 3 mm, the formed sheet defining a plurality of members attached to each other;
ii. plastically deforming each of the plurality of members to form a circumferal portion and lateral side portions;
iii. plastically deforming the enclosure such that each of the member reside approximately 90° with respect to another member, wherein upon forming the members are flexibly attached to each other to allow the enclosure to rotate between an open position and a closed position, and wherein the lateral side portions are adapted to form a first opening when the enclosure is in the closed position and the circumferal portions are configured to form a second opening when the enclosure is in the closed position.
i. forming a sheet of plastic material having a thickness between about 0.75 mm to 3 mm, the formed sheet defining a plurality of members attached to each other;
ii. plastically deforming each of the plurality of members to form a circumferal portion and lateral side portions;
iii. plastically deforming the enclosure such that each of the member reside approximately 90° with respect to another member, wherein upon forming the members are flexibly attached to each other to allow the enclosure to rotate between an open position and a closed position, and wherein the lateral side portions are adapted to form a first opening when the enclosure is in the closed position and the circumferal portions are configured to form a second opening when the enclosure is in the closed position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2588543 CA2588543A1 (en) | 2007-05-11 | 2007-05-11 | Flexible pipe enclosure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2588543 CA2588543A1 (en) | 2007-05-11 | 2007-05-11 | Flexible pipe enclosure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2588543A1 true CA2588543A1 (en) | 2008-11-11 |
Family
ID=39971154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2588543 Abandoned CA2588543A1 (en) | 2007-05-11 | 2007-05-11 | Flexible pipe enclosure |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2588543A1 (en) |
-
2007
- 2007-05-11 CA CA 2588543 patent/CA2588543A1/en not_active Abandoned
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