3 results about "Fusible plug" patented technology

An embodiment of an outdoor unit of a refrigeration cycle device includes a compressor, a pressure container that is connected to the compressor, a relief pipe that is connected to the pressure container, and a fusible plug that plugs an opening that is formed on the relief pipe. The relief pipe has a connector that is connected to the pressure container, and at least one bend that is formed on a portion that is located between the connector and the opening.

A testing device for airtightness testing of push-in fusible plugs, belonging to the field of fusible plugs. The testing device includes a base and a cover plate; the base and cover plate are connected by a hexagonal head bolt; a washer is installed on the contact surface between the hexagonal head bolt and the cover plate; a boss is provided in the middle of the base, and a first sealing ring is provided on the boss; a recess is provided at the contact point between the middle of the cover plate and the boss of the base; the boss and the recess achieve a sealed connection between the base and the cover plate. The fusible plug installation method of this invention is from the inside out, consistent with the inflation method during product use, solving the problem of lacking a testing device for airtightness testing of push-in fusible plugs, and eliminating safety hazards when the air pressure is from the outside in during airtightness testing; this invention facilitates airtightness testing of push-in fusible plugs and improves the testing efficiency of push-in fusible plugs.

The application aims to provide a high-efficiency energy-saving type hydraulic control safety valve actuator and a use method thereof, and belongs to the technical field of valve control. The actuator comprises an oil tank, a high-low pressure valve group and a fusible plug. One end of the bottom of the oil tank is provided with pipeline I. A hand pump, a check valve, a main oil source accumulator and a main oil source pressure gauge are sequentially arranged on the pipeline I. The high-low pressure valve group is connected with a field gas source. The fusible plug is connected with a pilot oil source accumulator and a pilot pressure gauge I through pipeline II. The top of the oil tank is connected with the pipeline I through pipeline III. A stop valve II and a hydraulic control pilot valve are arranged on the pipeline III. A pipeline IV is arranged between the pipeline III and the pipeline I. A stop valve I is arranged on the pipeline IV. The hydraulic control pilot valve is connected with the pipeline II through pipeline V. The application can prolong the pressure maintaining time of the hydraulic control safety valve and reduce the pressurizing frequency of the hand pump.