Tunnel boring machine having a device for detecting a content of critical gas
AssigneeHerrenknecht AG
InventorsJens Brandt, Markus Münchbach, Albert Feisst
Life of this patent
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Abstract
A device for detecting a content of critical gas in a mining chamber of a tunnel boring machine includes a separation module by which a fluid fed in via an extraction line connection is cleaned of solid and liquid components. A gas line arrangement arranged downstream of the separation module in the flow direction of the fluid carries the fluid, including substantially only gaseous components, through a pressure reducer and through a flow control valve of a metering module by which the gas to be analyzed can be delivered in a controlled manner assisted by a double diaphragm pump and a pressure stabilizer to a gas analysis unit even at high pressures in the cavity.
Claims12
A tunnel boring machine with a device for detecting a content of critical gas in a cavity (118) rearward of a cutting wheel (106) with an extraction line (124) that extends between a mining chamber (118) as a cavity and the device, with a separation module (224) for separating the gas to be detected from a fluid and with a gas analysis unit (133) downstream of the separation module (224), wherein a metering module (240) for controlled charging of a gas analysis unit (133) with separated gas is arranged downstream of the separation module (224), that the metering module (240) has a pressure reducer (239) and a flow control valve (251) downstream of the pressure reducer (239), and that a double diaphragm pump (245) is provided downstream of the pressure reducer (239).
Dependencies are inferred from the claim text.