5 results about "Explosive atmospheres" patented technology

The invention relates to a device for operating non-explosion-proof equipment in a potentially explosive atmosphere, comprising a pressurized housing (1) designed to accommodate the non-explosion-proof equipment (2), a purge gas inlet (3) arranged upstream of the housing (1) through which a protective gas (4) can be supplied to the housing (1) under overpressure, and a purge gas outlet (7) arranged downstream of the housing (1) through which the protective gas (4) can be discharged from the housing (1). For the discharge of the protective gas (4), an outlet valve (8) with a valve seat (16) and a valve body (30) is arranged in the purge gas outlet (7). The valve body (30) is connected to the first end of a guide axis (31) which is slidably mounted in a through bore (21) in the valve seat (16) along the valve axis (15) so that the valve body (30) is axially adjustable between a closed position and an open position.By means of a spring element (34), the valve body (30) is biased against the valve seat (16) in the closed position. To achieve efficient and gentle operation with moderate equipment costs, the invention proposes that a baffle element (32) be attached to the opposite second end of the guide axis (31) and that a control housing (25) with a working chamber (28) be connected to the valve seat (16), wherein the baffle element (32) is arranged within the working chamber (28) and without contact with the control housing (25). Furthermore, the control housing (25) has a connection (27) to which a control line (9) is connected for supplying the working chamber (28) with a working fluid (29), via which the working chamber (28) and the baffle element (32) arranged therein can be pressurized with the working fluid (29) from the control line (9).

This invention relates to a sail comprising: a body (1) having an entrance (2) into the body (1); and a base (3) on which the body (1) is disposed, wherein the entrance (2) is arranged on a side of the body (1). Preferably, the sail further comprises an access element (5) outside the base (3) for accessing the entrance (2), such as an access ladder extending vertically along the base (3). This invention provides a sail in which access to the interior of the sail is as simple and economical as possible, and the sail is suitable for vessels in areas with explosive atmospheres.

Fluidic system (10) for use in a potentially explosive atmosphere, comprising: - a pneumatic actuator (3) with a pressure chamber (14) and an actuator element (15) which can be set in motion by applying compressed air to the pressure chamber (14), - a valve arrangement (1) configured to connect the pressure chamber (14) to a compressed air source (6) to supply compressed air to the pressure chamber (14), and / or to fluidically connect the pressure chamber (14) to a pressure fluid sink (7) to release the compressed air from the pressure chamber (14), - a control unit (2) configured to control the valve arrangement (1), and - a system volume that can be pressurized with compressed air, comprising a pressure chamber internal volume (44) of the pressure chamber (14), a valve arrangement internal volume (45) of the valve arrangement (1) and / or a connection internal volume (46) of a fluidic connection (5), wherein the control unit (2) is designed, in addition to a normal operating mode in which the pressure chamber (14) is pressurized with compressed air to set the actuator element (15) in motion, to provide a purging mode and in the purging mode to actuate the valve arrangement (1) such that compressed air is repeatedly supplied to the system volume and system fluid present in the system volume is drained, so that the system fluid is diluted with the compressed air and at least partially removed from the system volume, wherein the valve arrangement (1) comprises at least one valve unit (11, 12) for fluidically connecting the system volume to the compressed air source (6) and / or the pressure fluid sink (7), wherein the fluidic system (10) is configured to operate at least one element of the valve unit (11, 12) with a reduced voltage (V2, V3) compared to the normal operating mode in the purging mode.

The present specification refers to a patent of invention for a foam formulation and its use in the temporary plugging of pipes, where the foam has volumetric and time stability, is prepared from a solution containing surfactant, co-surfactant, alkaline substance and LDH nanoparticles, is able to have its viscosity increased over time and remain intact for 8 hours or more even under pressure differences of up to 0.1 bar and a temperature of 60° C. and then it is able to disperse simply by using water or even the fluid transported in the pipeline. The LDH nanoparticle reinforced foam of the present invention can be applied in pipes that need to be plugged when they are undergoing maintenance, either to prevent incandescent soldering splashes from coming into contact with an explosive atmosphere or to avoid contamination in the pipe interior, among other applications. The present invention belongs to (but is not limited to) the field of plugs for pipes with explosive atmospheres and can be applied in systems that require temporary plugs that can be easily remover by using water or another solvent.

The present invention provides an explosion-proof system (1) with an easily established explosion-proof structure. In the explosion-proof system (1), which includes a position storage device (12) for a motor shaft present in an explosive atmosphere, the position storage device (12) maintains position data without receiving power from an external power supply.