Integrated Explosion Protection Apparatus For Supervision And Control Of Advanced Electrical Apparatuses

an explosion protection and integrated technology, applied in the direction of manipulators, lighting and heating apparatuses, heating types, etc., can solve the problems of insufficient reliability, inability to optimally locate the system, and high cost, and achieve the effect of cost-effective and reliable application

Inactive Publication Date: 2008-11-20
ABB AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The object of the present invention is to provide a pressure and purging controller and sensor apparatus that solves these problems and which is cost effective and reliable for application on advanced electrical apparatus and machineries as e.g. industrial robots and that contain a pressurized enclosure comprising sub-compartments linked together in a serial coupled set-up.

Problems solved by technology

A problem with known systems for explosion protection of electrical apparatuses is that they are heavy, voluminous, expensive and has to be provided with a number of local detectors and units for ventilation and that the systems therefore cannot be optimally located.
Another problem is that the known systems can fail, that they are not sufficiently reliable.
Another problem is that the relief valve often will be blocked by dust or paint.
Another problem is that the known systems do not obtain an optimal air consumption relief valve often will be blocked by dust or paint.

Method used

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  • Integrated Explosion Protection Apparatus For Supervision And Control Of Advanced Electrical Apparatuses
  • Integrated Explosion Protection Apparatus For Supervision And Control Of Advanced Electrical Apparatuses
  • Integrated Explosion Protection Apparatus For Supervision And Control Of Advanced Electrical Apparatuses

Examples

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Embodiment Construction

[0033]FIG. 1 illustrates schematically a known example of a pressurized enclosure consisting of serial coupled sub compartments with communicating passages. An inflow of pressurized air is shown schematically to the left and an outflow of the air to the right.

[0034]FIG. 2 illustrates a system overview of the integrated purge and pressure control system that includes a purge and pressure sensor and relief valve unit. A control cabinet is arranged to control a purge valve and a maintenance pressure valve. In a hazardous area a manipulator (not shown) is located inside an enclosure. A purge sensor and an exhaust valve are arranged on the enclosure, that typically is divided in sub compartments. The purge sensor is electrically connected via a cable located in a flexible hose and via a Zener barrier to the control cabinet.

[0035]FIG. 3 illustrates the purge relief valve unit which is designed to take high airflow capacity during purging and to give a determined air leakage during operati...

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PUM

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Abstract

The invention refers to an explosion protection system for electrical apparatuses and machineries, such as manipulators or industrial robots, located in hazardous environments, i.e. environments containing explosive concentrations of inflammable gases, dusts or vapours, comprising an air supply that applies internal pressurized air into an explosion proof enclosure. The invention is achieved by a flow- and pressure sensor arranged as an integrated unit and designed to stand high dynamic forces by having low inertia, balanced arrangement of moving parts and a movement guide, e.g. an axle with a support guide, with low friction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of pending International patent application PCT / IB2006 / 054993 filed on Dec. 21, 2006 which designates the United States and claims priority from Swedish patent application 0502927-7 filed on Dec. 28, 2005, the content of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a system for explosion protection of electrical apparatuses and machineries, such as manipulators or industrial robots, located in hazardous environments, such as environments containing explosive concentrations of inflammable gases, dusts or vapours. The invention is especially related to systems that apply internal pressurized air into an explosion proof casing / housing and having a purging system.BACKGROUND OF THE INVENTION[0003]Advanced electrical apparatuses and automatic machineries as e.g. robots will normally consist of a complex design including electrical components as e...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F24F11/00
CPCB25J19/0079
Inventor KROGEDAL, ARNULFTORKILDSEN, PER OLEBREKKEN, OLE KRISTIAN
Owner ABB AS
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