8 results about "Leak detection" patented technology

A valve and stem sealing assembly capable of preventing leakage under demanding environmental and operating conditions. The valve comprises a body and bonnet secured together to house a flow-element, stem, and stem sealing assembly. The body may contain a body joint encapsulated within its liner. The flow-element is positioned between a first port and second port on the valve. The body and bonnet may be configured to eliminate rotational forces from being translated to the bonnet. The stem sealing assembly comprises a primary seal, primary shaft insert, spacer, and force transmitting member. The stem sealing assembly may also comprise a secondary seal and secondary shaft insert. The stem seal assembly is substantially adjacent to the stem, and configured to fit within an annular space or cavity between the stem and the first body half, second body half, and bonnet. The valve may also include a leak detection port.

The invention discloses a floor heating pipeline liquid leak detection device which comprises an insulating detection module. One end of the insulating detection module is connected with a position detection module which is tightly attached to a floor heating pipeline for arrangement, and the other end of the insulating detection module is connected with a control module. One output end of the control module is connected with an alarm module, and the other output end of the control module is connected with a liquid inlet cut-off module arranged at the water inlet end of the pipeline. The position detection module comprises a first conducting tow, a second conducting tow and a first partition layer used for separating the first conducting tow from the second conducting tow. The first conducting tow and the second conducting tow are insulated when being dried and can achieve breakover when being immersed in water. The control module processes two sets of output impedances, so that the leak position and leak amount of the pipeline are obtained. According to the floor heating pipeline liquid leak detection device, the leak position and leak amount of the pipeline can be detected by processing the resistance values of the immersed first conducting tow and second conducting tow, the sensitivity is high, the design is reasonable, the structure is simple and operation is easy.

A semiconductor device (33), a leak detection device (43), an outer wall (20), and a separation wall (22) are provided on a substrate (12). A lid (28) is provided to face the substrate (12). A first hollow structure (44a) in contact with the semiconductor device (33) and a second hollow structure (44b) in contact with the leak detection device (43) are separated by the separation wall (22) and formed in an airtight state, wherein the hollow structures are enclosed by the substrate (12), the outer wall (20), the separation wall (22) and the lid (28). A terminal (14) electrically connected to the leak detection device (43) and at least partially exposed to the outside is provided. At least a part of the portion of the leak detection device (43) in contact with the second hollow structure (44b) is made of a corrosive metal or an alloy including a corrosive metal. At least a portion of the outer wall (20) is in contact with the second hollow structure (44b).

The invention discloses a leak detection device for a semiconductor special gas conveying pipeline, which comprises an outside-pipe clamping mechanism, a sealing cover and a gas detection mechanism, and is characterized in that the gas detection mechanism comprises a flow guide pipe and a balance pipe which are arranged on the outside-pipe clamping mechanism, and a gas detection bottle which is in threaded connection with the outside-pipe clamping mechanism; one end of the flow guide pipe extends to the inner side of the outside-pipe clamping mechanism and is used for collecting leaked special gas, the other end of the flow guide pipe can extend to the inner side of the balance pipe and is used for discharging the collected special gas, and the gas detection bottle is used for visualizing the leaked gas discharged by the flow guide pipe; the device is clamped on the outer side of the gas pipeline and is sealed by the sealing cover, so that an area to be subjected to leak detection on the gas pipeline is sealed in the device, and when gas in the gas pipeline leaks, the leaked gas is sealed in the device and cannot further leak to the outside.

An oil leak detection device for a hydraulic elevator is connected to a relay system control panel so as to enable communication therebetween, the relay system control panel controlling the operationof the hydraulic elevator, transmitting a travel signal if a car is traveling, transmitting a door zone signal if the car is located in a door zone, and transmitting an upward operation signal if thecar is traveling in the upward direction. The oil leak detection device is configured by comprising an oil leak determination unit which counts the number of times a re-leveling operation is carried out on the basis of whether the travel signal, door zone signal, and upward operation signal have been received from the relay system control panel, and detects oil leaks in the hydraulic elevator if the number of times the re-leveling operation is carried out becomes a preset number or more within a preset time.