WO2018143963A1 - Vented precipitation guarding manhole cover assemblies - Google Patents
Vented precipitation guarding manhole cover assemblies Download PDFInfo
- Publication number
- WO2018143963A1 WO2018143963A1 PCT/US2017/015908 US2017015908W WO2018143963A1 WO 2018143963 A1 WO2018143963 A1 WO 2018143963A1 US 2017015908 W US2017015908 W US 2017015908W WO 2018143963 A1 WO2018143963 A1 WO 2018143963A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- manhole cover
- protrusion
- vent opening
- valve
- manhole
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
- A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/20—Method-related aspects
- A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
Definitions
- Illustrative embodiments of the disclosure generally relate to manhole covers for manhole openings which overlie sewer systems. More particularly, illustrative embodiments of the disclosure relate to vented precipitation guarding manhole cover assemblies which close a manhole opening in a manhole structure above a sanitary sewer and vent sewer gas from the sewer as well as prevent or limit flow of precipitation into and overflow of storm water from the sewer.
- Sanitary sewers are subterranean tunnels which transport raw sewage from houses and commercial buildings to a treatment or disposal facility.
- Sewers may include pipelines which connect houses and buildings to one or more levels of larger underground trunk mains.
- Manholes are periodically- shaped vertical openings which connect the trunk mains to the ground surface for sewer gas venting and other purposes.
- Manhole covers are plates which are seated in manhole openings at the ground surface to close the manholes. The manhole covers can be selectively unseated from the manhole openings to provide access to the underlying subterranean sewer structure for cleaning, maintenance or repair.
- Vented precipitation guarding manhole cover assemblies which close a manhole opening in a manhole structure above a sanitary sewer and vent sewer gas from the sewer as well as prevent or limit flow of precipitation into and overflow of storm water from the sewer may be desirable for some applications.
- Illustrative embodiments of the disclosure are generally directed to vented precipitation guarding manhole cover assemblies which close a manhole opening in a manhole structure above a sanitary sewer and vent sewer gas from the sewer and prevent or limit flow of precipitation into the sewer and overflow of storm water from the sewer.
- An illustrative embodiment of the vented and precipitation guarding manhole cover assemblies includes a manhole cover having a generally planar exterior manhole cover surface and a manhole cover protrusion extending from the exterior manhole cover surface.
- the manhole cover protrusion has a protrusion edge contiguous with the exterior manhole cover surface. The protrusion edge demarcates the manhole cover protrusion from the exterior manhole cover surface.
- a protrusion surface of the manhole cover protrusion is contiguous with and extends from the protrusion edge.
- a protrusion apex of the manhole cover protrusion is contiguous with the protrusion surface.
- a manhole cover vent opening extends through the manhole cover protrusion and the manhole cover.
- FIG. 1 is a top view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies
- FIG. 2 is a bottom view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies;
- FIG. 3 is a side view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies;
- FIG. 4 is an enlarged sectional view of a manhole cover portion of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies
- FIG. 5 is an exploded side view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies, more particularly illustrating a vent valve and a gas discharging assembly including an odor absorbing container and an extension conduit which can be selectively and interchangeably fitted to the manhole cover (illustrated in cross-section) for various applications of the assemblies;
- FIG. 6 is an exploded and sectioned side view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies, more particularly illustrating fitting of the vent valve to the manhole cover in one typical application of the assemblies;
- FIG. 7 is a sectioned side view of the exemplary vented precipitation guarding manhole cover assembly fitted with the vent valve illustrated in FIG. 6;
- FIG. 8 is an enlarged sectional view of the vented precipitation guarding manhole cover assembly illustrated in FIG. 7, more particularly illustrating alternative positions of a valve ball in the vent valve in typical application of the assembly;
- FIG. 9 is an exploded side view of the illustrative vented precipitation guarding manhole cover assembly with the vent valve illustrated in FIG. 6, more particularly illustrating typical placement of the assembly on a manhole flange in a manhole structure over a sanitary sewer in typical application of the assembly;
- FIG. 10 is a side view of the illustrative vented precipitation guarding manhole cover assembly with the vent valve illustrated in FIG. 9, deployed in place on the manhole flange in the manhole structure;
- FIG. 11 is an enlarged sectional view of the vented precipitation guarding manhole cover assembly, with the vent valve open and permitting flow of sewer gas from the sanitary sewer through the manhole cover to the atmosphere;
- FIG. 12 is an enlarged sectional view of the vented precipitation guarding manhole cover assembly, with the vent valve closed and blocking overflow of storm water from the sanitary sewer through the manhole cover;
- FIG. 13 is an exploded side view of an illustrative embodiment of the vented precipitation guarding manhole cover assemblies, more particularly illustrating fitting of the extension conduit and the odor-absorbing container of the gas discharging assembly to the manhole cover in another typical application of the vented precipitation guarding manhole cover assemblies;
- FIG. 14 is a side view of the illustrative vented precipitation guarding manhole cover assembly illustrated in FIG. 13, with the extension conduit and the odor absorbing container fitted to the manhole cover;
- FIG. 15 is a sectional view of the vented precipitation guarding manhole cover assembly illustrated in FIG. 14, more particularly illustrating typical flow and deodorization of sewer gas from the sanitary sewer through the odor absorbing container, the manhole cover and the extension conduit, respectively, to the atmosphere; and
- FIG. 16 is an exploded side view of an alternative illustrative embodiment of the vented precipitation guarding manhole cover assemblies, more particularly illustrating selective and interchangeable attachment of a vent valve and a gas discharging assembly including an odor-absorbing container and an extension conduit to the manhole cover (illustrated in cross-section) for various applications of the assembly.
- FIGS. 1-15 of the drawings an illustrative embodiment of the vented precipitation guarding manhole cover assemblies, hereinafter assembly, is generally indicated by reference numeral 1.
- the assembly 1 is adapted to be mounted in a manhole structure 70 having a manhole shoulder 71 in a manhole opening 72 which in some applications may extend into the ground or a roadway surface 82 (FIG. 10) and communicates with a sanitary sewer 74 beneath the ground or a roadway surface 82.
- the assembly 1 vents or discharges sewer gas 60 (FIG. 11) such as hydrogen sulfide and mercaptan, for example and without limitation, from the sewer 74 to the atmosphere 66, as well as prevents or substantially limits the quantity of falling precipitation 78 (FIG. 11) from the atmosphere 66 and/or pooled precipitation 76 from the ground or roadway surface 82 which enters the sewer 74 through the manhole opening 72.
- the assembly 1 further prevents storm water 80 (FIG. 12) from rising from the sewer 74, overflowing the manhole opening 72 and flooding or contaminating the ground or roadway surface 82.
- the assembly 1 may deodorize odiferous sewer gas 60 from the sewer 74 and release the deodorized sewer gas 62 into the atmosphere 66.
- the assembly 1 may include a manhole cover 2.
- the manhole cover 2 may include steel, aluminum, carbon fiber composite, inert plastic or other suitable material, or any combination thereof.
- the manhole cover 2 may have an interior manhole cover surface 4 which faces the manhole opening 72 (FIG. 10), a generally planar exterior manhole cover surface 5 which faces the atmosphere 66 and an annular manhole cover edge 3 which circumscribes the interior manhole cover surface 4 and the exterior manhole cover surface 5 and faces the manhole structure 70 when the manhole cover 2 is seated on the manhole shoulder 71.
- at least one annular cover seal groove 6 may be provided in the interior manhole cover surface 4.
- At least one annular manhole cover seal 7 may be provided in the cover seal groove 6 for sealing purposes.
- the manhole cover seal 7 may include any type of sealing element which is capable of imparting a fluid-tight seal between the manhole cover 2 and the manhole shoulder 71 (FIG. 10) of the manhole structure 70 when the manhole cover 2 seats on the manhole shoulder 71.
- the manhole cover seal 7 may include a gasket or O-ring, for example and without limitation, as is known by those skilled in the art.
- a manhole cover protrusion 8 protrudes from the exterior manhole cover surface 5 of the manhole cover 2.
- the manhole cover protrusion 8 may be substantially centered on the exterior manhole cover surface 5.
- the manhole cover protrusion 8 may include a protrusion edge 9 which is contiguous with the exterior manhole cover surface 5 of the manhole cover 2.
- the protrusion edge 9 may demarcate the manhole cover protrusion 8 from the exterior manhole cover surface 5.
- a protrusion surface 11 may be contiguous with and extend from the protrusion edge 9.
- a protrusion apex 10 may be contiguous with the protrusion surface 11.
- contiguous means “sharing a common border; touching". As illustrated in FIG.
- the manhole cover protrusion 8 may have a maximum protrusion thickness 12.
- the maximum protrusion thickness 12 may be about 5/8 inch. In other embodiments, the maximum protrusion thickness 12 may be greater or less than about 5/8 inch.
- the protrusion apex 10 of the manhole cover protrusion 8 may represent the highest point on the entire exterior manhole cover surface 5.
- the manhole cover protrusion 8 may be fabricated in one piece with the manhole cover 2 using casting, molding, machining and/or other suitable fabrication techniques which are known by those skilled in the art. In other embodiments, the manhole cover 2 and the manhole cover protrusion 8 may be fabricated separately and welded or mechanically or metallurgically joined according to the knowledge of those skilled in the art.
- the manhole cover protrusion 8 may prevent or minimize entry of pooled precipitation 76 which accumulates on the exterior manhole cover surface 5 of the manhole cover 2 into the sewer 74 through the assembly 1.
- the protrusion surface 11 of the manhole cover protrusion 8 may be convex, as illustrated.
- the protrusion surface 11 may have a truncated, round, square, octagonal or other shape in cross-section.
- a cylindrical manhole cover flange neck 14 may protrude from the interior manhole cover surface 4 of the manhole cover 2, opposite and in substantial alignment with the manhole cover protrusion 8.
- An annular manhole cover flange 15 may protrude from the manhole cover flange neck 14.
- fastener openings 16 may be provided in the manhole cover flange 15 for purposes which will be hereinafter described.
- a manhole cover vent opening 20 may extend through the manhole cover protrusion 8, the manhole cover 2, the manhole cover flange neck 14 and the manhole cover flange 15.
- the manhole cover vent opening 20 may include an insert seat 21 which extends at least through the manhole cover protrusion 8 and a vent passage 22 which communicates with and extends from the insert seat 21 through the manhole cover 2, the manhole cover flange neck 14 and the manhole cover flange 15, respectively.
- the vent passage 22 may open at an interior surface of the manhole cover flange 15.
- the insert seat 21 may have a diameter which is larger than a diameter of the vent passage 22 of the manhole cover vent opening 20.
- an annular insert seat shoulder 24 may be formed between the insert seat 21 and the vent passage 22.
- the manhole cover vent opening 20 may have a diameter or width of about 1/2 inch. In other embodiments, the manhole cover vent opening 20 may have a diameter or width which is greater or less than 1/2 inch.
- the protrusion apex 10 of the manhole cover protrusion 8 may correspond to an outer edge of the insert seat 21 of the manhole cover vent opening 20 at the protrusion surface 11.
- the manhole cover 2 may be provided with at least one manhole cover opening (not illustrated) which facilitates selective unseating and removal of the manhole cover 2 from the manhole shoulder 71, typically in the conventional manner.
- a gas deodorizing assembly 44 may be disposed in fluid communication with the manhole cover vent opening 20 of the manhole cover 2.
- the vent valve 20 and the gas deodorizing assembly 44 may be configured for placement in fluid communication with the manhole cover vent opening 20 of the manhole cover 2 in interchangeable relationship to each other.
- the vent valve 28 may permit venting of sewer gas 60 (FIG. 11) from the sewer 74 to the atmosphere 66 while preventing or minimizing entry of pooled precipitation 76 and/or falling precipitation 78 from the atmosphere 66 into the sewer 74 through the manhole cover vent opening 20.
- the vent valve 28 may additionally prevent storm water 80 (FIG.
- the gas deodorizing assembly 44 may deodorize odiferous sewer gas 60 (FIG. 15) as it emanates from the sewer 74 through the vent opening 20. Accordingly, deodorized sewer gas 62 may be discharged from the vent opening 20 to the atmosphere 66.
- the vent valve 28 may include a valve insert 30 which is sized and configured for insertion into the insert seat 21 of the manhole cover vent opening 20.
- the valve insert 30 may include a valve insert side wall 31 which may be generally cylindrical.
- a valve insert end wall 32 may be provided on the valve insert side wall 31.
- a valve insert interior 33 may be formed by and between the valve insert side wall 31 and the valve insert end wall 32.
- At least one valve insert vent opening 34 may extend through the valve insert end wall 32. The valve insert vent opening 34 may communicate with the valve insert interior 33.
- the valve insert 30 may be inserted into the insert seat 21 until the valve insert side wall 31 engages the insert seat shoulder 24 at the junction between the insert seat 21 and the vent passage 22, as illustrated in FIGS. 6-8.
- the vent valve 28 may further include a valve plate 38 which may be secured to the manhole cover flange 15 on the manhole cover flange neck 14 of the manhole cover 2 according to the knowledge of those skilled in the art. At least one central valve plate vent opening 39 may extend through the valve plate 38. Multiple valve plate fastener openings 40 may extend through the valve plate 38 in a selected number and pattern. As illustrated in FIG.
- valve plate fasteners 41 may be extended through the respective valve plate fastener openings 40 in the valve plate 38 and threaded into the respective registering fastener openings 16 in the manhole cover flange neck 14 to fasten the valve plate 38 to the manhole cover flange 15 with the valve plate vent opening 39 in the valve plate 38 disposed in registration and fluid communication with the vent passage 22 of the manhole cover vent opening 20, as illustrated in FIGS. 7 and 8.
- the vent valve 28 may further include a valve ball 36 which is disposed within the vent passage 22 of the manhole cover vent opening 20 and the valve insert interior 33 of the valve insert 30.
- the valve ball 36 may be fabricated of plastic and/or other lightweight buoyant material. As illustrated in FIG. 8, in typical operation of the vent valve 28, which will be hereinafter described, the valve ball 36 may be normally deployed by gravity in the lower position indicated in solid lines in FIG. 8. Accordingly, the valve ball 36 may close or block the valve plate vent opening 39 in the valve plate 38 from the vent passage 22 of the manhole cover vent opening 20. As illustrated in FIG. 11, in the lower position, the valve ball 36 may facilitate venting of sewer gas 60 from the sewer 74 through the vent valve 28 and manhole cover 2 to the atmosphere 66.
- the sewer gas 60 may flow through the valve plate vent opening 39 in the valve plate 38 and between the bottom of the valve ball 36 and the valve plate 38 and the sides of the valve ball 36 and between the interior surfaces of the vent passage 22 and through the valve insert interior 33 of the valve insert 30 and discharged through the valve insert vent opening 34 to the atmosphere 66.
- the valve ball 36 Responsive to the upward pressure of the inflowing sewer gas 60, the valve ball 36 may partially "float" within the vent passage 22 to permit flow of the sewer gas 60 from the sewer 74 into the manhole cover vent opening 20. In the lower position, the valve ball 36 may further prevent or minimize influx of pooled precipitation 76 and/or falling precipitation 78 through the vent valve 28 and manhole cover 2 and into the sewer 74. As illustrated in FIG.
- valve ball 36 in the upper position, may seat against the valve insert end wall 32 and close or seal the valve insert vent opening 34 in the valve insert 30 from the valve insert interior 33 of the vent valve 28 to prevent storm water 80 from overflowing from the sewer 74 through the vent valve 28 and manhole cover 2 to the exterior manhole cover surface 5 of the manhole cover 2, respectively, particularly under heavy precipitation conditions.
- the gas deodorizing assembly 44 may include an odor absorbing container 46 which may be attached to the manhole cover 2 according to the knowledge of those skilled in the art.
- the odor absorbing container 46 may include a container wall 47.
- the container wall 47 may include a bag-shaped enclosure having a flexible gas-permeable or semi-permeable material such as a fabric material, for example and without limitation.
- a material which is suitable for fabrication of the container wall 47 includes a mesh polyethylene material.
- the container wall 47 of the odor absorbing container 46 may be attached to the manhole cover 2 according to the knowledge of those skilled in the art.
- a container securing band 49 may be provided on the container wall 47 of the odor absorbing container 46.
- the container securing band 49 may facilitate attachment of the container wall 47 to the manhole cover flange neck 14 and/or to the manhole cover flange 15 of the manhole cover 2.
- the container securing band 49 may include an elastic material.
- the container securing band 49 may be secured using hook and loop fasteners, snaps, clamps, mechanical fasteners and/or other suitable fastening mechanism known by those skilled in the art.
- the container wall 47 of the odor absorbing container 46 may enclose a container interior 48 which is disposed in fluid communication with the vent passage 22 of the manhole cover vent opening 20 in the manhole cover 2.
- An odor absorbing material 50 may be provided in the container interior 48.
- the odor absorbing material 50 may include any type of particulate or non-particulate material which is capable of absorbing at least some of the odiferous chemicals, compounds or components in the odiferous sewer gas 60 from the sewer gas 60 as the sewer gas 60 flows from the sewer 74 through the odor absorbing container 46 and the manhole cover vent opening 20 in the manhole cover 2, respectively, to the atmosphere 66.
- the odor absorbing material 50 may include sawdust.
- the container 46 may be generally bowl-shaped or semi-spherical and may be fabricated of a rigid or semi-rigid material.
- the container wall 47 may include steel, aluminum, carbon fiber composite, inert plastic or other suitable material, or any combination thereof. At least one gas opening (not illustrated) may extend through the container wall 47.
- the container wall 47 may be adapted for attachment to the manhole cover 2 such as via the manhole cover flange neck 14, the manhole cover flange 15 and/or via any other suitable attachment structure, mechanism or technique which is known by those skilled in the art.
- Non- limiting examples of techniques which are suitable for attaching the container wall 47 of the odor absorbing container 46 to the manhole cover 2 are described in U.S. Pat. No. 8,851,791, which is incorporated by reference herein in its entirety.
- the gas deodorizing assembly 44 may further include an elongated extension conduit 52 which is placed in fluid communication with the manhole cover vent opening 20 of the manhole cover 2.
- the extension conduit 52 may be configured to seat in the insert seat 21 in fluid communication with the vent passage 22 of the manhole cover vent opening 20. Accordingly, the extension conduit 52 may interface with the manhole cover vent opening 20 in interchangeable relationship to the valve insert 30 of the vent valve 28.
- the extension conduit 52 may have an extension conduit inlet end 53 which inserts into the insert seat 21 and seats against the insert seat shoulder 24 between the insert seat 21 and the vent passage 22 in the manhole cover vent opening 20 and an extension conduit outlet end 54 which is opposite the extension conduit inlet end 53.
- a conduit bore 55 may traverse the length of the extension conduit 52 from the extension conduit inlet end 53 to the extension conduit outlet end 54. Accordingly, the extension conduit 52 may facilitate venting of sewer gas 60 from the sewer 74 through the manhole cover vent opening 20 to the atmosphere 66 while preventing pooled precipitation 76 which may accumulate on the exterior manhole cover surface 5 of the manhole cover 2 from entering the sewer 74 through the manhole cover vent opening 20.
- the extension conduit 52 may be used in combination with the odor absorbing container 46. In other applications, each of the odor absorbing container 46 and the extension conduit 52 may be used independently of the other.
- the vent valve 28 may be installed in the manhole cover 2 typically as was heretofore described with respect to FIGS. 5-8.
- the assembly 1 may be installed in a manhole opening 72 in a manhole structure 70 which extends through the ground or a roadway surface 82 (FIG. 10) and communicates with the subterranean sanitary sewer 74.
- the manhole opening 72 may be circumscribed by a manhole shoulder 71.
- the manhole structure 70 may include steel, iron or other metal.
- the assembly 1 is placed in the manhole opening 72 with the manhole cover seal 7 on the manhole cover 2 resting on the manhole shoulder 71.
- the manhole cover 2 may be bolted and/or otherwise fixedly secured over the manhole opening 72 according to the knowledge of those skilled in the art.
- the exterior manhole cover surface 5 of the manhole cover 2 may be generally flush with the ground or roadway surface 82.
- the protrusion surface 11 on the manhole cover protrusion 8 enables an automobile wheel 84 of an automobile (not illustrated) to easily traverse the assembly 1 as the automobile wheel 84 traverses the ground or roadway surface 82.
- valve ball 36 of the vent valve 28 normally seats by gravity on the valve plate 38 and closes the valve plate vent opening 39. Accordingly, as illustrated in FIG. 11, sewer gas 60 may rise from the sewer 74 and flow initially through the valve plate vent opening 39 and then beneath and around the valve ball 36 and through the vent passage 22 of the manhole cover vent opening 20 and the valve insert interior 33 of the valve insert 30, respectively, discharging through the valve insert vent opening 34 in the valve insert end wall 32 of the valve insert 30 to the atmosphere 66.
- FIG. 11 As further illustrated in FIG. 11, during rainfall or other falling precipitation
- valve ball 36 of the vent valve 28 may normally seat by gravity on the valve plate 38 (indicated in solid lines in FIG. 8) but still facilitate venting of sewer gas 60 from the sewer 74 to the atmosphere 66, as was heretofore described.
- a small portion of the falling precipitation 78 may be capable of entering the manhole cover vent opening 20.
- the falling precipitation 78 may impart weight to the valve ball 36, which seats against the valve plate vent opening 39 and prevents or substantially limits the quantity of falling precipitation 78 which can enter the sewer 74.
- the height of the protrusion apex 10 of the manhole cover protrusion 8 beyond the plane of the exterior manhole cover surface 5 of the manhole cover 2 and the ground or roadway surface 82 additionally limits the quantity of the pooled precipitation 76 which can enter the sewer 74 by preventing the pooled precipitation 76 from flowing into the manhole cover vent opening 20 until the depth of the pooled precipitation 76 exceeds the height of the protrusion apex 10.
- storm water 80 may rise in the sewer 74.
- the manhole cover 2 may have been bolted to the underlying manhole structure 70, and the manhole cover seal 7 imparts a fluid-tight seal between the manhole cover 2 and the manhole shoulder 71.
- the storm water 80 may rise through the valve plate vent opening 39 in the valve plate 38 of the vent valve 28, the manhole cover vent opening 20 of the manhole cover 2 and the valve insert interior 33 of the valve insert 30, respectively, and finally through the valve insert vent opening 34 to the exterior manhole cover surface 5 and the ground or roadway surface 82.
- valve ball 36 seals the valve insert vent opening 34 from the manhole cover vent opening 20 and prevents the storm water 80, and raw sewage in the storm water 80, from discharging through the valve insert vent opening 34 to the ground or roadway surface 82.
- the assembly 1 prevents a substantial portion of falling precipitation 78 and/or pooled precipitation 76 from entering the sewer 74 through the manhole opening 72.
- the assembly 1 may facilitate escape of sewer gas 60 from the sewer 74 to the atmosphere 66 under normal weather conditions as well as during light rainfall or other falling precipitation 78.
- the vent valve 28 of the assembly 1 prevents storm water 80 from overflowing from the sewer 74 and discharging to the ground or roadway surface 82, particularly in applications in which the manhole cover 2 is bolted and/or otherwise secured in the manhole opening 72.
- the assembly 1 may prevent application of a vacuum seal to the manhole cover 2, rendering ease in removal of the manhole cover 2 from the manhole opening 72.
- the assembly 1 may prevent rusting of the manhole cover 2 to the underlying manhole shoulder 71, also rendering ease in removal of the manhole cover 2 from the manhole opening 72.
- the assembly 1 may additionally prevent or reduce rattling of the manhole cover 2 as the automobile wheel 84 (FIG. 10) traverses the manhole cover 2 and the assembly 1.
- the gas discharging assembly 44 may be installed in the manhole cover 2 typically as was heretofore described with respect to FIGS. 13-15.
- the assembly 1 may be installed in a manhole opening 72 in a manhole structure 70 which extends through the ground or a roadway surface 82 and communicates with the subterranean sanitary sewer 74, as illustrated in FIG. 15.
- Sewer gas 60 may normally emanate from the sewer 74 through the porous or semi-porous container wall 47 and the odor absorbing material 50 in the container interior 48 of the odor absorbing container 46 and then through the vent passage 22 and the insert seat 21, respectively, of the manhole cover vent opening 20, and discharge to the atmosphere 66.
- the odor absorbing material 50 in the odor absorbing container 46 may absorb a substantial portion of the odiferous chemicals, compounds or components in the sewer gas 60. Consequently, deodorized sewer gas 62 may rise from the insert seat 21 of the manhole cover vent opening 20 to the atmosphere 66.
- the odor absorbing material 50 in the odor absorbing container 46 may absorb a substantial quantity of the odiferous chemicals, compounds or components in the sewer gas 60 from the sewer 74, the otherwise objectionable smell of the sewer gas 60 in the atmosphere 66 may be eliminated or at least substantially reduced.
- the extension conduit 52 may be seated in the insert seat 21 in fluid communication with the vent passage 22 of the valve seat 20. Accordingly, the extension conduit 52 may be self- standing in the insert seat 21, and the sewer gas 60 may be vented from the sewer 74 through the manhole cover vent opening 20 and the extension conduit 52 to the atmosphere 66.
- the extension conduit 52 may prevent pooled precipitation 76 which accumulates to a high level on the ground or roadway surface 82 and the exterior manhole cover surface 5 of the manhole cover 2 from entering the sewer 74 through the manhole cover vent opening 20.
- the extension conduit 52 may be used in combination with the odor absorbing container 46. In other applications, each of the odor absorbing container 46 and the extension conduit 52 may be used independently of the other.
- the odor absorbing material 50 in the container interior 48 of the odor absorbing container 46 may be periodically replaced, as deemed necessary, by removing the container wall 47 typically from the manhole cover flange 15 such as by releasing the container securing band 49; removing the used odor absorbing material 50 from the container interior 48; placing fresh or replacement odor absorbing material 50 in the container interior 48; reattaching the container wall 47 to the manhole cover flange 15 typically by re-securing the container securing band 49; and replacing the manhole cover 2 in the manhole opening 72, respectively.
- FIG. 16 of the drawings an alternative illustrative embodiment of the vented precipitation guarding manhole cover assembly, hereinafter assembly, is generally indicated by reference numeral 101.
- the manhole cover protrusion 108 may cover substantially the entire exterior manhole cover surface of the manhole cover protrusion 108. Accordingly, the protrusion edge 109 of the manhole cover protrusion 108 may form the junction between the manhole cover edge 103 and the manhole cover protrusion 108.
- the protrusion surface 111 may be generally convex in cross-section and extends from the protrusion edge 109 to the protrusion apex 110 typically at the edge of the manhole cover vent opening 120. In other embodiments, the protrusion surface 111 may have a truncated, round, square, octagonal or other shape in cross-section.
- the vent valve 128 can be assembled by insertion of the valve insert 130 into the insert seat 121 of the vent opening 120 and attachment of the valve plate 138 typically to the manhole cover flange 115.
- the vent valve 128 may facilitate flow of sewer gas 60 (FIG. 11) from the sewer 74 to the atmosphere 66. Additionally, the vent valve 128 may prevent or substantially minimize entry of pooled precipitation 76 (FIG. 11) from the exterior manhole cover surface 5 and/or falling precipitation 78 (FIG. 11) from the atmosphere 66 through the manhole cover vent opening 120 into the sewer 74.
- the vent valve 128 may prevent or substantially minimize overflow of storm water 80 (FIG. 12) from the sewer 74 through the manhole cover vent opening 120 to the exterior surface of the manhole cover 102.
- the relatively small diameter of the vent passage 122 may substantially limit the quantity of falling precipitation 78 and/or pooled precipitation 76 which is capable of entering the sewer 174 through the manhole cover vent opening 120.
- the raised profile of the protrusion apex 110 of the manhole cover protrusion 108 substantially limits the quantity of pooled precipitation 76 and/or falling precipitation 78 which can flow from the protrusion surface 111 of the manhole cover 102 through the vent opening 120 and into the sewer 74.
- the gas deodorizing assembly 144 may be assembled by attachment of the odor absorbing container 146 typically to the manhole cover flange 115. Accordingly, the gas deodorizing assembly 144 deodorizes odiferous sewer gas 60 (FIG. 15) from the sewer 74 and deodorized sewer gas 62 is discharged from the manhole cover vent opening 120 into the atmosphere 66. Additionally or alternatively, the extension conduit 152 can be deployed in the vent opening 120.
- the extension conduit 152 may facilitate venting of sewer gas 60 from the sewer 74 through the vent opening 120 to the atmosphere 66 while preventing pooled precipitation 76 which accumulates to a high level on the protrusion surface 111 of the manhole cover protrusion 108 from entering the sewer 74 through the vent opening 120.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PCT/US2017/015908 WO2018143963A1 (en) | 2017-01-31 | 2017-01-31 | Vented precipitation guarding manhole cover assemblies |
CA3017490A CA3017490A1 (en) | 2017-01-31 | 2017-01-31 | Vented precipitation guarding manhole cover assemblies |
AU2017397258A AU2017397258A1 (en) | 2017-01-31 | 2017-01-31 | Vented precipitation guarding manhole cover assemblies |
AU2020200241A AU2020200241A1 (en) | 2017-01-31 | 2020-01-13 | Vented precipitation guarding manhole cover assemblies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/US2017/015908 WO2018143963A1 (en) | 2017-01-31 | 2017-01-31 | Vented precipitation guarding manhole cover assemblies |
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WO2018143963A1 true WO2018143963A1 (en) | 2018-08-09 |
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PCT/US2017/015908 WO2018143963A1 (en) | 2017-01-31 | 2017-01-31 | Vented precipitation guarding manhole cover assemblies |
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AU (2) | AU2017397258A1 (en) |
CA (1) | CA3017490A1 (en) |
WO (1) | WO2018143963A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4512492A (en) * | 1983-12-12 | 1985-04-23 | Graybeal Walter C | Manhole closure with a single liquid impervious, two-way gas pressure relief valve |
KR20110093249A (en) * | 2010-02-12 | 2011-08-18 | 화동주물공업주식회사 | A pressure controller with a manhole cover |
US20120227168A1 (en) * | 2011-03-08 | 2012-09-13 | Paoluccio John J | Manhole odor eliminator |
US20130089373A1 (en) * | 2011-10-11 | 2013-04-11 | Ameren Corporation | Systems and methods for venting gas in the event of an explosion in a space covered by a manhole cover |
US8851791B1 (en) * | 2013-09-11 | 2014-10-07 | David Putnam | Manhole cover venting and precipitation guarding devices |
-
2017
- 2017-01-31 AU AU2017397258A patent/AU2017397258A1/en not_active Abandoned
- 2017-01-31 CA CA3017490A patent/CA3017490A1/en not_active Abandoned
- 2017-01-31 WO PCT/US2017/015908 patent/WO2018143963A1/en active Application Filing
-
2020
- 2020-01-13 AU AU2020200241A patent/AU2020200241A1/en not_active Abandoned
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US4512492A (en) * | 1983-12-12 | 1985-04-23 | Graybeal Walter C | Manhole closure with a single liquid impervious, two-way gas pressure relief valve |
KR20110093249A (en) * | 2010-02-12 | 2011-08-18 | 화동주물공업주식회사 | A pressure controller with a manhole cover |
US20120227168A1 (en) * | 2011-03-08 | 2012-09-13 | Paoluccio John J | Manhole odor eliminator |
US20130089373A1 (en) * | 2011-10-11 | 2013-04-11 | Ameren Corporation | Systems and methods for venting gas in the event of an explosion in a space covered by a manhole cover |
US8851791B1 (en) * | 2013-09-11 | 2014-10-07 | David Putnam | Manhole cover venting and precipitation guarding devices |
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Title |
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GROMICKO ET AL.: "Standpipes", INTERNACHI, 22 August 2010 (2010-08-22), XP055531410, Retrieved from the Internet <URL:https://www.nachi.org/standpipes.htm> * |
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Publication number | Publication date |
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AU2017397258A1 (en) | 2018-10-25 |
AU2020200241A1 (en) | 2020-02-06 |
CA3017490A1 (en) | 2018-08-09 |
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