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CA-3021867-C - STORMWATER DRAIN BAFFLE

CA3021867CCA 3021867 CCA3021867 CCA 3021867CCA-3021867-C

Abstract

A stormwater drain baffle (1) to be disposed in a flowthrough stormwater sump (2) or chamber for baffling a stormwater flow-path. The baffle has a plurality of openings (3) distributed over the area of the baffle. The baffle comprises at least two baffle portions (4, 5, 6) connected to each other. The baffle portions ( 4, 5, 6) are disposed near to and in superposed relation to each other, so that the baffle portions overlap each other and are adjustably connected to each other for adjusting the width (Wtot) of the baffle (1). At least the outermost baffle portions of the baffle (I) comprise fixing members (7, 8) which are monolithic with the baffle portion ( 4, 5) and adapted for fixing the baffle (1) to the vertical inner wall of the sump or the chamber.

Inventors

  • NIKO PAIVINEN

Assignees

  • UPONOR INFRA OY

Dates

Publication Date
20260505
Application Date
20170419
Priority Date
20160420

Claims (15)

  1. What is claimed is: 5 10 15 20 25 30 35 1. A stormwater drain baffle to be disposed in a flow-through stormwater sump or chamber for baffling a stormwater flow-path, the baffle having a plurality of openings distributed over the area of the baffle, the baffle comprising at least two baffle portions connected to each other, wherein the baffle portions are disposed near to and in superposed relation to each other so that the baffle portions overlap each other and are adjustably connected to each other for adjusting the width of the baffle, wherein at least outermost baffle portions of the baffle comprise fixing members which are monolithic with the baffle portions and adapted for fixing the baffle to an inner sidewall of the stormwater sump or the chamber, wherein the baffle portions comprise edges and upper and lower stiffening members which are disposed at the edges, wherein the stiffening members are stiffening flanges which are monolithic with the baffle portions, wherein the baffle comprises a rectangular first baffle portion and a rectangular second baffle portion, wherein the first baffle portion and the second baffle portion each have a first side and a second side, and the second side is the opposite side in relation to the first side, wherein the upper and lower stiffening members are directed to the first side, and wherein an inner distance between the upper and lower stiffening flanges of the first baffle portion is larger than an outer distance between the upper and lower stiffening flanges of the second baffle portion.
  2. 2. The baffle according to claim 1, wherein the fixing members comprise fixing flanges having at least one bolt hole for a first bolted joint. 11
  3. 3. The baffle according to claim 1 or 2, wherein the baffle portions are substantially planar. 5 10 15 20 25 30
  4. 4. The baffle according to claim 1, wherein the stiffening members are disposed at all four edges of the baffle portions.
  5. 5. The baffle according to claim 3 wherein the stiffening flanges are bent at an angle in relation to the plane of the baffle portions.
  6. 6. The baffle according to claim 5, wherein the stiffening flanges are bent at a right angle in relation to the planes of the baffle portions.
  7. 7. The baffle according to claim 2, wherein the fixing flanges are additional stiffening flanges.
  8. 8. The baffle according to any one of the claims 1 to 7, wherein the baffle portions have a width which is smaller than the diameter of the manhole of a stormwater sump into which the baffle is to be installed.
  9. 9. The baffle according to claim 8, wherein the width of the baffle portions is smaller than 600 mm.
  10. 10. The baffle according to claim 2, wherein t h e fixing flange of the first baffle portion is vertical and directed towards the first side and the fixing flange of the second baffle portion is vertical and directed to the second side. 12 5 10 15 20
  11. 11. The baffle according to claim 10 wherein the stiffening flange of the first baffle portion, which is disposed at the edge that is parallel in relation to the vertical fixing flange of the first baffle portion, is directed to the second side.
  12. 12. The baffle according to claim 10 or 11, the stiffening flange of the second baffle portion, which is disposed at the edge that is parallel in relation to the vertical fixing flange of the second baffle portion, is directed to the first side.
  13. 13. The baffle according to any one of the claims 1 to 12, wherein the baffle portions are connected to each other by second bolted joints.
  14. 14. The baffle according to any one of the claims 1 to 13, wherein the baffle portions are made of plastics.
  15. 15. The baffle according to claim 14, wherein the baffle portions have a wall thickness of 5 to 15 mm. 13

Description

WO 2017/182711 PCT/Fl2017/050293 STORMWATER DRAIN BAFFLE FIELD OF THE INVENTION The present invention relates to a stormwater drain 5 baffle to be disposed in a flow-through stormwater sump The or chamber for baffling a baffle has a plurality of stormwa ter flow-pa th. openings distributed over the area of the baffle. The baffle comprises at least two baffle portions connected to each other. BACKGROUND OF THE INVENTION Stormwater drainage system is designed to drain excess rain and ground water from impervious surfaces such as paved streets, car parks, parking lots, footpaths, 15 sidewalks, and roofs. Stormwater drains vary in design from small residential dry wells to large municipal systems. Many stormwater drainage systems are designed to drain the untreated stormwater containing pollutants into sea, lakes or rivers. In the 20 stormwater drainage system, stormwater is collected to a flow-through stormwater sump or well. The stormwater sump is generally a concrete cylinder having an inlet pipe and an outlet pipe located at distance from the bottom of the sump. The particles suspended in 25 stormwater are supposed to settle as a sediment layer on the bottom of the sump. Under low flow conditions sump is able to remove suspended sediment, but under high flow conditions the sump is unable to retain the particles when the water enters the sump at high flow 30 rate. Then the sump becomes filled with water and the incoming high rate flow creates an undesirable circular flow pattern inside the sump which causes resuspension and wash out of the sediment from the bottom to the outlet pipe. In prior art, documents US 35 8715507, US 8663466 and US 2012/0255622 have proposed to retrofit the sump with a baffle. The baffle has 1 WO 2017/182711 PCT/Fl2017/050293 proved to be efficient to reduce the undesirable wash out of the sediment. US 8663466 and US 2012/0255622 disclose stormwater drain baffles having a plurality of openings distributed over the area of the baffle. 5 The baffle comprises at least two baffle portions connected to each other. The baffle portions are attached to a support frame structure which is rather complicated having many different parts. 1 0 OBJECTIVE OF THE INVENTION It is an objective of the present invention to provide an improved stormwater drain baffle with a simple and stiff structure and which easily can be adjusted to a variety of different diameters of sumps. It is also an objective of the present invention to provide a baffle which has integrated stiffening and fixing elements and provides to be attachable to the sidewall of the sump or chamber. SUMMARY OF THE INVENTION According to an aspect of the present invention, it provides a stormwater drain baffle to be disposed in a flow-through stormwater sump or chamber for baffling a 25 stormwater flow-path, the baffle having a plurality of openings distributed over the area of the baffle, the baffle comprising at least two baffle portions connected to each other. According to the invention the baffle portions are disposed near to and in 30 superposed relation to each other so that the baffle portions overlap each other and are adjustably connected to each other for adjusting the width of the baffle. At least the outermost baffle portions of the baffle comprise fixing members which are monolithic 35 with the baffle portion and adapted for fixing the 2 WO 2017/182711 PCT/Fl2017/050293 baffle to the vertical inner wall of the sump or the chamber. The technical effect of the invention is that the 5 structure of the baffle is simple having a few parts and the baffle width can easily be adjusted to fit to sumps with different diameters for fixing to the sidewall of the sump. 10 In one embodiment of the baffle, the fixing members comprise a fixing flange having at least one bolt hole for a first bolted joint. In one embodiment of the baffle, the baffle portions 15 are substantially planar. In one embodiment of the baffle, the baffle portion comprises edges and stiffening members, and that the stiffening members are disposed at the edges. In one embodiment of the baffle, the baffle portions are rectangular in shape. In one embodiment of the baffle, the stiffening 25 members are disposed at least at two edges of a rectangular baffle portion. In one embodiment of the baffle, the stiffening members are disposed at all four edges of each 30 rectangular baffle portion. In one embodiment of the baffle, the stiffening members are stiffening flanges which are monolithic with the baffle portion. 3 WO 2017/182711 PCT/Fl2017/050293 In one embodiment of the baffle, the stiffening members are stiffening flanges which are bent at an angle in relation to the plane of the baffle portion. In one embodiment of the baffle, the stiffening flanges are bent at right angle in relation to the plane of the baffle portion. In one embodiment of the baffle, the fixing flange is 10 a stiffening flange. In one embodiment of the baffle, the baffle portion has a width which is s