Emergency release device for ultra-low temperature fluid handling equipment

Abstract

The invention discloses an emergent release device for ultralow temperature fluid handling equipment. The emergent release device comprises an upper ball valve, a lower ball valve, a valve on-off mechanism and a locking mechanism, wherein the valve on-off mechanism drives the two ball valves to be turned on or off synchronously, and the locking mechanism is arranged on the outer edge of the butt-joint faces of the two ball valves and used for controlling the two ball valves to be locked or released. The valve on-off mechanism comprises a four-connecting-rod mechanism installed between valve rods of the two ball valves and a driver installed on a valve rod base on one side of the two ball valves. According to the emergent release device, the valves can be independently turned off on the condition that a handling arm is not adopted, the sealing performance of the valves is good, and the valve on-off mechanism is simple in structure and convenient to operate; and when the two ball valves are released, the handling arm will not be hooked, and the accident that the handling arm collapses is eradicated.

Description

technical field [0001] The invention relates to a key part of liquid conveying equipment, in particular to an emergency release device for ultra-low temperature fluid loading and unloading equipment. Background technique [0002] The liquid medium is transferred between the shipping freighter and the wharf through the fluid loading and unloading arm. The fluid loading and unloading arm is a key component on the wharf and is used for docking and loading and unloading with the ship on the port wharf. The emergency release device is an important part of the fluid loading and unloading arm, which is used to quickly separate the loading and unloading arm from the tanker in dangerous situations such as the anchor chain being broken, the ship drifting out of the berth, fire, sudden storm, etc. However, when the general emergency release device encounters unpredictable reasons such as wind and waves, the freighter will drift away from the normal working range. Although the loading a...

AI Technical Summary

Problems solved by technology

However, when the general emergency release device encounters unpredictable reasons such as wind and waves, the freighter will drift away from the normal working range. Although the loading and unloading arm has a certain extension distance, when it exceeds this extension distance, the pulling phenomenon will occur. General pulling can damage the infusion equipment, cause the liquid to be transported to leak, cause marine pollution, and seriously cause the liquid loading and unloading arm to collapse, causing serious accidents

[0003] In order to quickly disengage the loading and unloading arm from the tanker, the existing marine low-temperature fluid loading and unloading equipment proposed in the patent document No. 201310041938.3 is realized by setting a spring assembly between the left and right hoops and the upstream valve body of the lower ball valve. The left and right hoops are quickly opened to separate the upper and lower ball valves. However, after a long-term use of the spring assembly, its elasticity decreases, which reduces the reliability of disengagement.

In order to solve the problem of valve body leakage caused by pulling during the quick disengagement process of the loading and unloading arm, there is a patented small-diameter emergency disengagement valve for ultra-low temperature (patent No. 201320061046.5) by adding a long rod to the piston rod of the oil cylinder. Simultaneously push the upper cam and the lower cam on the outside of the upper ball valve and the lower ball valve body to rotate at the same time, so as to realize the simultaneous closing of the upper and lower ball valves, but because the moment arm of this setting is relatively short, the torque of the oil cylinder operation will increase, and at the same time, the cam will be closed The requirements for manufacturing precision and installation precision are high, and a slight error may lead to the phenomenon that the valve cannot be completely closed or the opening and closing degree is inconsistent.

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