GB1589803A

GB1589803A - Pipe drain inlet

Info

Publication number: GB1589803A
Application number: GB1736278A
Authority: GB
Original assignee: Robertson Co H H
Current assignee: Robertson Co H H
Priority date: 1978-05-03
Filing date: 1978-05-03
Publication date: 1981-05-20
Also published as: IE790820L; IE48025B1

Description

(54) PIPE DRAIN INLET (71) We, H. H. ROBERTSON COMPANY, a Corporation organised and existing under the, laws of the State of Pennsylvania United States of America, of Two Gateway Center, Pittsburgh, Pennsylvania 15222, United States of America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement : This invention relates to land drainage systems generally and has for its object to provide a new or improved pipe drain inlet assembly for use for example in ditches and culverts to drain water therefrom above a predetermined level. The invention also comprehends a set of parts for constructing a pipe drain inlet assembly.

According to this invention there is provided a pipe drain inlet assembly, comprising an open top silt trap or sump, one or more open fronted modular inlet units superposed vertically upon said silt trap or sump to form an inlet, and a grating disposed across said inlet for inhibiting ingress of debris.

Preferably the open fronted modular inlet units are generally U-shaped.

The components of the assembly may be located in vertical alignment by means of interengaging peripheral flanges. The grating has a lower flange seated upon the front rim of the silt trap, and an upper flange sceured by one or more brackets to the rear rim of an inlet unit. The height of the assembly can be increased as required by adding modular inlet units.

Preferably said assembly components are constructed primarily from glass-fibre reinforced cement, although other suitable materials may be employed, e.g. reinforced synthetic resin.

Preferably the units have arcuate rear wall parts whereby drain pipes, tile drains, or the like can readily be entered therein at any angle, with limits, appropriate apertures being formed by a cutting operation.

The invention is further described with the aid of the accompanying drawings which illustrate by way of example one embodiment.

In said drawings, Figure 1 is a perspective view from the front and one side of a pipe drain inlet assembly according to the invention: Figure 2, is a front elevation; Figure 3 is a section as on line A-A of Figure 2; Figure 4 is a plan view; and Figure 5 is a fragmentary view drawn to an enlarged scale, as compared with the preceding views, of the part ringed in Figure 3.

Figure 6 is a schematic elevation of a typical pipe drain inlet assembly according to the invention in position of use across a ditch.

Referring to said drawings, 10 generally denotes a silt trap or sump unit, 20 a modular inlet unit, and 30 a readily removable grating which extends completely across the inlet of the assembly to prevent the ingress of debris.

Referring to the silt trap unit 10, this consists of an open topped receptacle having a dished bottom 11, a front planar wall 12, and rearwardly convergent side walls 13 connected by an arcuate rear wall 14. The dished bottom 1-1 facilitates levelling of the silt trap unit during installation. The rim of the unit 10 is provided with an outwardly extending flange 15 along the entire length thereof.

In an alternative embodiment, the silt trap 10 may be of cylindrical configuration instead of having the front planar wall 12.

Each modular inlet unit 20 is generally "U" shaped in plan and comprises rearwardly convergent side walls 21 connected by an arcuate rear wall 22. The front edges of the side walls 21 are formed with outwardly extending planar flanges 23. The bottom edge of the unit 20 is provided with a flange 24 which is of angled cross-section, and the upper edge of the unit has a planar outwardly extending flange 25.

The angled lower flange 24 is dimensioned so as to seat upon the upper flange 25 of a fellow modular unit 20 or upon the upper flange 15 of a silt trap 10.

The grating 30 has a frame comprising a lower transverse member 31, upwardly inclined side members 32, and an arcuate rear frame member 33 which lies in a substantially horizontal plane. A series of uniformally spaced parallel grating bars 34 extend for the main part between the lower frame member 31 and the arcuate rear frame member 33.

When assembled for use as shown in Figure 6, the silt trap unit 10 is embedded in the bottom of a ditch X or other waterway so that the flange 15 thereof is substantially level with the bottom Y of the ditch, and modular inlet units 20 are superposed thereon to required height, e.g. the top Z of the ditch X. The flanges 15, 24, and 25 of the respective units 10 and 20 cooperate to positively locate the units 10 and 20 laterally. The flanges 15, 24 and 25 are embedded in the surrounding earth or other medium and thereby prevent vertical displacement of the units 10 and 20. The upper modular inlet unit 20 of an assembly may have the front parts of its side walls 21 chamfered as at 21a.

The grating 30 is located in position by means of its lower frame member 31 which rests upon the upper flange 15 of the front wall 12 of the silt trap 10, and one or more brackets 40 (see more particularly Figures 4 and 5) locked upon the arcuate rear frame member 33. Each bracket 40 comprises a downwardly extending " U "-shaped part 41, and a horizontally extending "U"-shaped part 42. The part 41 is arranged to embrace the frame member 33 and be locked thereon by a bolt 43. To enhance resistance to corrosion, the outer end of the bolt 43 (see Figure 5) may have the thread stripped therefrom. The part 42 is arranged to fit around the upper flange 25 of a modular unit 20. The said upper flange 25 may be recessed as at 25a to accommodate the part 42.As will be seen, the grating conforms closely to the internal configuration and dimensions of the modular inlet units 20 and comprises a lower sloping portion and a horizontal upper portion. The said sloping portion of the grating tends, during flood conditions, to be self clearing of floating debris. The grating, although resistant to unauthorised removal, can be removed completely to provide access for cleaning by removing the bolts 43.

The curved rear wall portions of the silt trap and inlet modules enable pipe drains, as 50 in Figure 6, to be entered into the assembly at any angle to permit the flow of water therefrom, and the grating 30 prevents blocking of the associated ditch. The horizontal upper portion of the grating ensures its efficient functioning irrespective of the depth of the water in the ditch and also copcs with debris from above.

The silt arap or sump unit 10 preferably has a depth of not less than 300 mm, and the height of each modular inlet unit 20 may also be about 300 mm. The depth of the silt trap preferably is about 600 mm.

The overall width of the assembly may be 1000 mm and its dimensions back to front about 750 mm. The radius of curvature of the rear wall parts may be 375 mm.

Where the depth of an assembly necessitates the use of a ladder to gain access to the silt trap or sump for cleaning purposes, modular or other ladder sections may be provided, such sections having means for location upon the flanges of the components of the assembly. Such ladder means may remain in situ. Alternatively, climbing rungs may be formed or provided in some or all of the components.

The silt trap 10, especially when of cylindrical configuration in plan, as opposed to having a planar front face, lends itself per se to use as a junction box for the entry therein at any angle of land drain pipes. In such use a flanged lid preferably is supplied.

WHAT WE CLAIM IS:- 1. A pipe drain inlet assembly, compris ing an open top silt trap or sump, one or more open fronted modular inlet units superposed vertically upon said silt trap or sump te form an inlet, and a gratitlg disposed across said inlet for inhibiting ingress of debris.

2. A pipe drain inlet assembly as claimed in claim 1 wherein the open fronted modular units are generally U-shaped.

3. A pipe drain inlet assembly, as claimed in claim 1 or 2, wherein the components of the assembly are located in vertical alignment by means of cooperating flanges of the components.

4. A pipe drain inlet assembly, as claimed in claim 1, 2 or 3 wherein said silt trap or sump has a dished bottom, a planar front wall, rearwardly converging side walls, an arcuate rear wall, and the upper rim whereof is provided with an outwardly extending planar flange.

5. A pipe drain inlet assembly, as claimed in claim 4, wherein said modular inlet units each comprise rearwardly convergent side walls, an arcuate rear wall, a planar flange extending outwardly from the upper edge of the unit, a flange of angled cross-section extending from the lower edge, and the front edges of said side walls each having an outwardly extending planar flange.

6. A pipe drain inlet assembly, as claimed in claim 4 or claim 5, wherein said grating comprises a transverse lower frame member, upwardly inclined side frame members, an arcuate rear frame member which lies in a substantially horizontal plane and a series of grating bars extending generally between

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. The grating 30 has a frame comprising a lower transverse member 31, upwardly inclined side members 32, and an arcuate rear frame member 33 which lies in a substantially horizontal plane. A series of uniformally spaced parallel grating bars 34 extend for the main part between the lower frame member 31 and the arcuate rear frame member 33. When assembled for use as shown in Figure 6, the silt trap unit 10 is embedded in the bottom of a ditch X or other waterway so that the flange 15 thereof is substantially level with the bottom Y of the ditch, and modular inlet units 20 are superposed thereon to required height, e.g. the top Z of the ditch X. The flanges 15, 24, and 25 of the respective units 10 and 20 cooperate to positively locate the units 10 and 20 laterally. The flanges 15, 24 and 25 are embedded in the surrounding earth or other medium and thereby prevent vertical displacement of the units 10 and 20. The upper modular inlet unit 20 of an assembly may have the front parts of its side walls 21 chamfered as at 21a. The grating 30 is located in position by means of its lower frame member 31 which rests upon the upper flange 15 of the front wall 12 of the silt trap 10, and one or more brackets 40 (see more particularly Figures 4 and 5) locked upon the arcuate rear frame member 33. Each bracket 40 comprises a downwardly extending " U "-shaped part 41, and a horizontally extending "U"-shaped part 42. The part 41 is arranged to embrace the frame member 33 and be locked thereon by a bolt 43. To enhance resistance to corrosion, the outer end of the bolt 43 (see Figure 5) may have the thread stripped therefrom. The part 42 is arranged to fit around the upper flange 25 of a modular unit 20. The said upper flange 25 may be recessed as at 25a to accommodate the part 42.As will be seen, the grating conforms closely to the internal configuration and dimensions of the modular inlet units 20 and comprises a lower sloping portion and a horizontal upper portion. The said sloping portion of the grating tends, during flood conditions, to be self clearing of floating debris. The grating, although resistant to unauthorised removal, can be removed completely to provide access for cleaning by removing the bolts 43. The curved rear wall portions of the silt trap and inlet modules enable pipe drains, as 50 in Figure 6, to be entered into the assembly at any angle to permit the flow of water therefrom, and the grating 30 prevents blocking of the associated ditch. The horizontal upper portion of the grating ensures its efficient functioning irrespective of the depth of the water in the ditch and also copcs with debris from above. The silt arap or sump unit 10 preferably has a depth of not less than 300 mm, and the height of each modular inlet unit 20 may also be about 300 mm. The depth of the silt trap preferably is about 600 mm. The overall width of the assembly may be 1000 mm and its dimensions back to front about 750 mm. The radius of curvature of the rear wall parts may be 375 mm. Where the depth of an assembly necessitates the use of a ladder to gain access to the silt trap or sump for cleaning purposes, modular or other ladder sections may be provided, such sections having means for location upon the flanges of the components of the assembly. Such ladder means may remain in situ. Alternatively, climbing rungs may be formed or provided in some or all of the components. The silt trap 10, especially when of cylindrical configuration in plan, as opposed to having a planar front face, lends itself per se to use as a junction box for the entry therein at any angle of land drain pipes. In such use a flanged lid preferably is supplied. WHAT WE CLAIM IS:-

1. A pipe drain inlet assembly, compris ing an open top silt trap or sump, one or more open fronted modular inlet units superposed vertically upon said silt trap or sump te form an inlet, and a gratitlg disposed across said inlet for inhibiting ingress of debris.

the transverse lower member and the arcuate rear frame member.

7. A pipe drain inlet assembly, as claimed in claim 6, wherein said transverse lower frame member of the grating seats upon the upper flange of the front wall of the silt trap, and the arcuate rear frame member of the grating is secured to the upper flange of a respective modular inlet unit by means of brackets bolted thereto.

8. A pipe drain inlet assembly, as claimed in claim 7, wherein the upper part of the grating lies in a substantially horizontal plane.

9. A pipe drain inlet assembly, as claimed in any of the preceding claims, including means for locating a ladder or ladder sections therein.

10. A pipe drain inlet assembly, as claimed in any of claims 1 to 8, wherein said components or certain of same have climbing rungs incorporated therein.

11. A pipe drain inlet assembly, substantially as herein described with reference to the accompanying drawings.

12. A set of parts, for erecting a pipe drain inlet assembly as claimed in any of the preceding claims, comprising an open top silt trap or sump, one or more open fronted inlet modules for fitment upon said silt trap or sump to form an inlet and a grating for fitment across the inlet.