Connecting joint device of LNG (Liquefied Natural Gas) liquid level sensor output cable and transmitter

Abstract

The invention discloses a connecting joint device of an LNG (Liquefied Natural Gas) liquid level sensor output cable and a transmitter. The connecting joint device includes a connecting seat fixed and sealed on the transmitter; the connecting seat is filled with an insulating sealing element; a joint wire is sealed in and penetrates through the insulating sealing element; one end of the joint wire is fixed with a connector male head; a connecting end of an insulating wire is provided with a connector female head which is electrically connected with a wire of the insulating wire and can be matched with the connector male head for connecting; a connector fastening sleeve can connect a tubular fastening joint and a connecting seat together; a first insulating sleeve pipe for surrounding the connector male head is sealed on the insulating sealing element; a second insulating sleeve pipe is sealed and sleeved outside the connector female head; when the connector female head and the connector male head are connected, the first insulating sleeve pipe and the second insulating sleeve pipe are mutually sealed and connected; and the connector male head and the connector female head are enabled to be sealed with and insulated from the connecting seat and the tubular fastening joint. The invention has the advantages of the good insulating and sealing performance.

Description

technical field [0001] The invention relates to a connecting joint device of an output cable of an LNG liquid level sensor and a transmitter. Background technique [0002] LNG is an abbreviation for liquefied natural gas. In the application field of liquefied natural gas, after the liquefied natural gas is stored in the LNG storage tank, the liquid level sensor is usually used to detect the liquid level in the storage tank, and then the detected liquid level signal is sent to the transmitter through the output cable; during installation, The liquid level sensor is installed in the LNG storage tank, and then the output cable of the liquid level sensor is passed through the distribution head on the storage tank, so that the other end of the sensor output cable is connected to the transmitter through the connecting joint device. The structure of the sensor output cable is as follows: it includes an insulated wire with an insulating layer at the center, and a shielded hose with...

AI Technical Summary

Problems solved by technology

The disadvantage of this connection joint device is: because the temperature in the LNG storage tank is very low (about minus 162°C); the temperature of the insulated wire in the sensor output cable is also very low, resulting in the connection between the connection seat and the tubular fastening joint. The air in the air is cooled and condenses into condensed water. The condensed water will cause a short circuit between the connector male or connector female and the connection seat and tubular fastening joint, resulting in poor safety and reliability of the overall equipment. and the sealing effect of the above-mentioned connecting joint device is poor, and the air not only easily enters the cavity formed after the connecting seat and the tubular fastening joint are butted from the connecting end face between the connecting seat and the joint fastening sleeve and the tubular fastening joint, but also It is also easy to enter the cavity formed after the connection seat and the tubular fastening joint are butted from the axial gap between the insulated wire and the tubular fastening joint, thereby greatly increasing the number of connections between the connector male head or the connector female head and the connecting seat, tubular tight joint. Probability of short circuit between housings such as solid joints

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