16 results about "Explosive atmospheres" patented technology

Described herein is a safety and support system for a fuel cell module comprising: a pressure-tight safety casing for enclosing the fuel cell module and for containing a fluid; a fuel supply system, arranged to transport fuel to the fuel cell module from an external source; an air supply system, arranged to transport air to the fuel cell module from an external source, an exhaust system, arranged to transport exhaust fluids from the fuel cell module out of the safety casing, and a casing atmosphere system comprising: an inlet into the safety casing having an inlet valve, an outlet from the safety casing having an outlet valve, means for evacuating the fluid from the safety casing through the outlet, and a pressure sensor, arranged for measuring a pressure of the fluid inside the safety casing, wherein the casing atmosphere system is arranged to maintain a below ambient pressure inside the safety casing. Also described herein is a method for preventing an explosive atmosphere inside a safety casing and a fuel cell system for marine applications.

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).

ULTRASONIC DEVICE AND ULTRASONIC-ASSISTED SIEVE FOR OPERATION IN AN ATMOSPHERE COMPRISING EXPLOSIVE DUST The invention relates to an ultrasonic device (1000) comprising: an ultrasonic transmitter (1200), configured to convert an electric current into an ultrasonic vibration; an electrical circuit (1300), configured to supply the electric current to the ultrasonic transmitter; a sealed casing (1400), delimiting an interior volume (1420) isolated from the outside, a part of the ultrasonic transmitter and a part (1320) of the electrical circuit being positioned in the interior volume, the sealed casing comprising an exterior surface configured to be in contact with an explosive atmosphere;the ultrasonic device being characterized in that it comprises a protection means (1310, 1500) configured to open the electrical circuit when a parameter representative of a failure in the operation of said ultrasonic device is greater than a threshold. Figure to be published with the abstract: Figure 2;

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.

To provide a housing comprising means capable of adjusting relative relation between a sensor installed inside the housing and a detection body, which is an object detected by a sensor, from the outside of the housing.SOLUTION: A housing 1 comprises a sensor 30 installed inside the housing 1, a detection body 12 that is an object detected by the sensor, and an adjustment unit 20 that adjusts relative relation between the sensor 30 and the detection body 12 from the outside of the housing. Consequently, as the relative relation between the sensor 30 and the detection body 12 can be adjusted from the outside of the housing 1, the relative relation between the sensor 30 and the detection body 12 inside the housing 1 can be safely adjusted even in an explosive atmosphere.SELECTED DRAWING: Figure 2

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 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) is arranged in the purge gas outlet (7) with a valve seat (16) and a valve body (30). 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).

The utility model provides a waste gas dilution pretreatment device for a raw pesticide production process. A mixed dilution system is provided with a mixed air header pipe which is communicated with a waste gas induced draft system; a fresh air inlet pipe and an industrial waste gas inlet pipe are arranged at the front part of a dilution air pipe; the waste gas induced draft system comprises a combustible gas concentration detector, an induced draft fan, a flame arrester, an adsorption pipeline and a combustion pipeline, the combustible gas concentration detector, the induced draft fan and the flame arrester are arranged on a mixed air header pipe, the adsorption pipeline and the combustion pipeline are connected with the mixed air header pipe in parallel, the adsorption pipeline is provided with a second switching valve, and the combustion pipeline is provided with a first switching valve; and the combustible gas concentration detector, the first switching valve and the second switching valve are electrically connected with the PLC control center. The device has the beneficial effects that the explosive atmosphere in the waste gas is effectively controlled and maintained in a safe controllable range, so that the safety risk possibly occurring in the tail gas conveying process is obviously reduced.

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.

[Problem] To provide a housing comprising a means with which it is possible to adjust, from the outside of the housing, the relative relationship between a sensor installed inside the housing and a detection body to be detected by the sensor. [Solution] A housing 1 comprises: a sensor 30 installed inside the housing 1; a detection body 12 to be detected by the sensor; and an adjustment unit 20 that adjusts the relative relationship between the sensor 30 and the detection body 12 from the outside of the housing. Due to this configuration, the relative relationship between the sensor 30 and the detection body 12 can be adjusted from the outside of the housing 1, and therefore the relative relationship between the sensor 30 and the detection body 12 in the housing 1 can be safely adjusted even in an explosive atmosphere.

The invention relates to a boat sail comprising a main body (1) provided with an entrance (2) into the main body (1), and a pedestal (3), the main body (1) being disposed on the pedestal (3), wherein the entrance (2) is arranged in a side of the main body (1). Preferably, the boat sail also comprises an access element (5) outside the pedestal (3) for access to the entrance (2), such as an access ladder that extends vertically along the pedestal (3). The invention provides a boat sail in which access to the inside thereof is as simple and economical as possible and which is suitable for use in boats with explosive atmosphere zones.

The present disclosure relates to an explosion-proof housing with a non-metal first housing part and a non-metal second housing part which are bonded together at a connection point in order to close off an inner volume of the explosion-proof housing in an explosion-proof or ignition-proof manner from an explosive atmosphere. Each housing part has at least one reinforcement assembly which is arranged in the region of the connection point between the two housing parts. Each reinforcement assembly has a reinforcement protrusion and a metal reinforcement element. Upon establishment of the connection between the housing parts, preferably one respective reinforcement assembly of the first housing part and one respective reinforcement assembly of the second housing part lie opposite each other. The reinforcement assemblies lying opposite each other can additionally optionally be connected to each other by means of at least one coupling element, preferably a metal coupling element.

A device (4) according to the invention for the intrinsically safe power supply of a device (1), in particular an intrinsically safe device in an explosion-hazardous area with a recurring short-term high power requirement, comprises - a device (5) for detecting a quantity (U) representing an electric current (I) flowing into or through the device (1), - at least one monitoring device (10) which is designed, based on the detected quantity (U), to simultaneously monitor the device (1) for both a risk of ignition sparking and a thermal overload, and to limit and / or switch off the current (I) in response to a risk of ignition sparking and / or a thermal overload. This allows the intrinsically safe device (1) to temporarily operate at a higher functional electrical power. The invention thus enables devices or functions contained therein that were previously not feasible in terms of intrinsic safety, such as devices with non-encapsulated high-frequency electrical components that have a recurring, short-term high power requirement.

The utility model discloses a test explosion venting device and a test box. The test explosion venting device comprises a double-chain structure vacuum turning plate and a pneumatic pressing device, the double-chain structure vacuum turning plate is mounted on the box body pressure relief opening of the test box and is used for performing pressure relief operation on the interior of the test box; and the pneumatic pressing device is connected with the double-chain structure vacuum turning plate and is used for performing pressing operation on the double-chain structure vacuum turning plate, so that the sealing ring in the double-chain structure vacuum turning plate is in a pressed state. The test explosion venting device and the test box disclosed by the utility model are scientific in structural design, the test explosion venting device can reliably meet the requirements of users of test boxes such as an explosion-proof environment test box, an explosive atmosphere test box and the like on reusability and vacuum sealing performance guarantee, the sealing effect is excellent, the reusability is strong, and the test box is convenient to use. The method has great practical significance.

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.