DE8909341U1 - Collection tray for pourable and flowable materials - Google Patents

Description

H.-J. Klatt 5392 DE

- Welding technology - A/sz

Grenzacherstrasse 20 a

7888 Rheinfelden

Catchment tray for slippery and flowable materials

Description

The invention relates to a liquid-tight collecting tray for slidable and flowable, in particular environmentally hazardous substances, consisting of a tray base and side walls.

Such drip trays are used to collect chemicals that leak from production plants, e.g. in the event of an accident. The drip trays can also be used as storage containers for chemical drums and waste materials in landfills. This prevents a threat to landfills from chemicals leaking from leaky drums and containers.

Regular inspection is necessary for known drip trays, as the material and the welds wear out due to corrosion, thermal and mechanical stress.

The invention is based on the task of creating a collecting tray in which the stress on the welds caused by clamping and tensile forces as a result of thermal and mechanical stresses

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stress is reduced compared to conventional drip trays.

This problem is solved according to the invention in that the tub floor and the side walls consist of a supporting frame formed by ioiil supports, the spaces between which are connected by welded plates to form closed wall surfaces,

that the plates are formed into trays, the side walls of which are welded to the pipe supports with their upper edges, and that the welds of the plates with the supporting frame are accessible from the inside of the collecting tray.

Since the plates are formed into troughs, they are not butt welded to the supporting frame with their upper edges in a fillet weld. This avoids a weld seam that is particularly stressed by thermal and mechanical loads.

An advantageous shape of the tubs is that the side walls form an angle of between 90 and 115 degrees with the floor.

Furthermore, the invention is based on the object of creating a collecting tray that can be checked for corrosion without great technical effort such as removal or disassembly.

This object is achieved according to the invention in that leaks in the collecting tray can be found by detecting a test gas flowing out of the pipe supports under the tray floor using a gas detector.

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Because the pipe supports are used as a pipe system for the test gas, there is no need to lay a pipe system or a hose system that is susceptible to shocks and does not last long.

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that the pipe supports are provided with holes on the underside of the collecting tray

that the pipe supports have an easily accessible opening for refilling the cavity with a gas, that the cavities of the pipe supports are connected to one another, that an outer wall is attached to the wall pipe supports, that the collecting tray is in a basin, and that the test gas used is helium.

These features make it possible to fill the hollow spaces in the pipe supports with an inert gas, which is distributed under the entire support surface of the collecting tank due to the holes in the pipe supports. Gas penetrating the collecting tank through corroded or cracked areas of the tank bottom can be detected using a gas detector. The test gas cannot escape from the side through the outer wall or because the collecting tank is in a basin. This leak test was previously very complex, as the weld seams had to be viewed. Helium is suitable as an inert gas due to its physical properties.

Further embodiments according to the invention can be seen in that the upper edge of the side walls of the collecting tray is provided with an angle strip or a pipe as a closing support,

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and that the hollow beams and the plates are made of corrosion-resistant steel. This increases the stability and durability of the collecting tray.

Furthermore, an embodiment according to the invention can be seen in that the flow channel is arranged below the level of the tub bottom.

The advantages achieved with the invention lie in the fact that a collecting tray can be installed later without difficulty under chemical plants built on supports by welding the support frame and the trays underneath the chemical plant. The laborious and often impossible installation of entire collecting trays is no longer necessary.

A further advantage achieved with the invention is that the supporting frame can be adapted to the geometric requirements and thus collecting trays can be manufactured in all dimensions without the use of specially designed parts.

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Further features and special features of the invention can be found in the exemplary embodiments shown in the drawings and explained in more detail below.

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Fig.l nine collecting tray in top view,

Fig.2 a collecting tray in side view,

Fig.3 a trough welded to two pipe supports in side section ,

Fig.4 a detailed view of the tub floor with side wall in side view,

Fig.5 a detailed view of the tub floor with a wall pipe support,

Fig.6 the upper edge of a side wall of the collecting tray in side view ,

Fig.7 a drainage channel in section.

The longitudinal floor pipe supports 2, the transverse floor pipe supports 8 and the wall pipe supports i made of round pipes with a diameter of 15 mm to 200 mm are welded at the cross points 3 and the attachment points 4 and form a framework of a collecting tray that can be built up to any size. Trays 5 with a span of approx. 1500 mm are inserted into the framework, which, as shown in Fig.3, are attached with their side walls 6 to the floor pipe supports 2 or wall pipe supports 1

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and are attached to them with the weld seam 9. The base plate 7 and the side wall 6 of the tray 5 are bent at an angle of about 1/2 degrees to each other. Vibrations, mechanical and thermal deformations of the collecting tray are thus not transmitted to the weld seams 9, but are absorbed by the bending.

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Welding at the abutting edges of the side walls 6 made of sheet metal. The floor pipe supports are attached to the brackets 1'+ and secure the collecting tray against slipping. To prevent the collecting tray from warping in the event of thermal expansion or mechanical stress, only some of the floor supports are attached to the brackets IA. The upper edge 13 of the side walls of the collecting tray is provided with an angle IA for reinforcement, which also closes the wall supports 1 which are open at the top.

The cavities 11 of the bottom pipe supports 2 and wall pipe supports 1 can be filled with an inert gas, which is distributed under the entire base of the collecting tray thanks to the holes 12. The holes 12 on the underside of the tray bottom B have a diameter of approx. 2.5 mm and a distance of approx. 100 mm from one another. Helium or the forming or protective gas commonly used for welding is expediently used as the inert gas. A gas detector designed as a commercially available leak detector can be used to detect the forming or protective gas penetrating the collecting tray through corroded or cracked areas of the tray bottom. If all the cavities 11 are connected to one another, the inert gas only needs to be introduced into the frame via one pipe support. The wall pipe supports 1, which are open at the upper edge of the collecting tray, must be closed beforehand.

Fig.7 shows a drainage channel welded to two ground pipe supports in section.

KURT ALLGEIER, Patentanfra,n., P«-'78.B9 Rhtjj pE'elden

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- CASE KEYWORD - ke y-word REFERENCE SIGN -LIST Bl. FILE EN drip tray APPLICANT 5392 Mr. Klatt

POS. DESIGNATION &igr; POS.!NAMING / DESIGNATION Side wall Underground 1 Wall pipe support 59 R Pipe support 2 longitudinal floor pipe support 60 U 3 Cross point 61 4 Starting point 62 5 Tub 63 6 Side wall 64 7 Base plate 65 8th kink point 66 9 Weld 67 10 transverse floor pipe support 68 11 cavity 69 12 drilling 70 . . 13 upper edge of the side wall 71 ' I · f 14 Angle bar 72 * * · 15 holder 73 16 Drainage channel 74 17 Exterior wall 75 18 76 19 77 20 78 21 79 22 80 23 81 24 82 25 83 26 84 27 85 28 86 29 87 30 88 31 89 32 90 33 91 34 92 35 93 36 94 37 95 38 96 39 97 40 98 41 99 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 _{t t} 58 B Warinenboden S

Claims (4)

H.-J. Klatt 5392 DE - Welding technology - A/sz Grenzacherstraße 20 a 7888 Rheinfelden Collecting tray for liquid and flowable materials A &eegr; s &rgr; r ü c h e 1. Liquid-tight collecting tray for slippable and flowable, particularly environmentally hazardous substances, consisting of a tank bottom and side walls,
characterized, A. that the tank bottom (B) and the side walls (S) consist of a supporting frame formed by tubular supports (R), the Spaces are connected to closed wall surfaces by welded panels, B. that the plates are formed into slats (5) whose side walls (6) are connected with their upper edges to the pipe supports (R) are welded, C. that the welds (9) of the plates with the support frame are accessible from the inside of the collecting tray. - A2 - - A 2 - 5392 EN A/Sz 2. Collecting tray according to claim 1, characterized in that the side walls (6) form a Form angles between 90 and 15 degrees. 3, collecting tray according to claim 1, characterized in that the pipe supports (R) on the underside of the collecting tray with holes (12). ■ 4. Collecting tray according to claim 3, characterized in that leaky spots in the collecting tray can be detected by j a test gas flowing out of the pipe ^carriers (R) under the inner bottom (Jö) can be detected with a gas detector. 5. Collecting tray according to claim 1, characterized in that the pipe carrier (R) provides an easily accessible opening for
Filling the cavity (11) with the test gas. ti. Collecting tray according to claim 1, characterized in that the cavities (11) of the pipe supports (R) are connected to each other. 7. Collecting tray according to claim 1, characterized in that an outer wall (17) is attached to the wall pipe supports (1) is. 8. Collecting tray according to claim 1, characterized in that the collecting tray is located in a basin. 9. Collecting tray according to claim 4, characterized in that the test gas used is helium. -A3- * till · · · - A 3 - 5392 EN A/Sz 10. Collecting tray according to claim 1, characterized in that ''the upper edge of the side walls (S) of the collecting tray with a winding strip (1�Lgr;) or a R. .?ir as a final support is provided. 11. Collecting tray according to claim 1, characterized in that between two pipe supports (R) a Drain channel (16) is arranged below the level of the tub floor. 12. Collecting tray according to claim 1, characterized in that the pipe supports (R) and the trays (5) are made of corrosion-resistant made of steel.