Steel belt deflection device for flexible sludge flushing of secondary side tube plate of steam generator
A steam generator, secondary side technology, applied in chemical instruments and methods, cleaning methods and utensils, cleaning hollow objects, etc. Weight, Conducive to Miniaturization, Conducive to Lightweight Effect
Pending Publication Date: 2022-06-24
CHINA NUCLEAR POWER OPERATION TECH
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Problems solved by technology
[0004] The traditional flexible sludge washing gun usually uses the structure of motor + gear + screw + connecting rod to drive the yaw device for yaw, the mechanism is complex, heavy and takes up a lot of space
However, due to the narrow working space where the flexible sludge washing gun is located, the available space for the internal structure is less
[0005] Due to the structural limitation of the steam generator itself, there is only a small gap between the push gun head and the steam generator flow distribution plate or the lower blocking block, while the flexible and flexible sludge washing gun is a long cantilever structure when it works, and the drooping of the gun head It will cause it to interfere with the lower block of the steam generator, affecting the use of the equipment
Method used
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[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] like figure 1 Shown, the operation of the steel belt deflection device of the existing steam generator secondary side tube sheet flexible sludge flushing gun. It mainly relies on the expansion and contraction of the sliding rod 7 (that is, the linear movement in the horizontal direction), which drives the yaw arm 2 to swing around the rotating shaft 3, thereby driving the swinging guide wheel 1 to press the steel belt 4, (the steel belt 4 is pre-embedded with washing The hose can lead the flushing high-pressure water to the target position that needs to be flushed), so that under the guidance of the swing guide wheel 1 and the fixed guide wheel 5, it enters the steam generator tube at a certain angle. (its position is fixed to provide positioning for the bending of the steel strip, which is used to control its bending angle)
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The invention discloses a steam generator secondary side tube plate flexible sludge flushing steel belt deflection device which comprises a swing guide wheel, a deflection arm, a rotating shaft, a guide wheel, a limiting guide wheel, a sliding rod, a first SMA spring, a second SMA spring and a control device, one end of the sliding rod is a block body, the first SMA spring and the second SMA spring are arranged at the two ends of the block body respectively, and the first SMA spring and the second SMA spring are arranged on the swing guide wheel. The two ends of the first SMA spring are connected with control systems respectively, the two ends of the second SMA spring are connected with control systems respectively, the rod-shaped end of the sliding rod is connected with a deflection arm, one end of the deflection arm is connected with a rotating shaft, the other end of the deflection arm is connected with a swing guide wheel through the rotating shaft, and the guide wheel is arranged at the position opposite to the swing guide wheel. The steel belt deflection device has the advantages that the SMA spring is used as a driving element to directly drive the deflection device to move, and the structure of the steel belt deflection device for flexible sludge flushing of the secondary side tube plate of the steam generator is simplified.
Description
technical field [0001] The invention belongs to the technical field of steam generators in nuclear power plants, and in particular relates to a steel belt deflection device suitable for flushing flexible sludge of secondary side tube sheets of steam generators. Background technique [0002] Due to the possible serious consequences of sludge deposition on the secondary side of the steam generator tube sheet on the steam generator, the removal of sludge has become an important part of the maintenance management of the steam generator in the nuclear power plant. For the sub-hard and hard sludge formed after long-term operation of the steam generator, it is necessary to extend the flexible steel belt carrying the high-pressure hose into the heat transfer tube to reduce the energy loss of the high-pressure water jet and improve the flushing effect. [0003] When in use, the flexible sludge flushing gun enters from the central pipe gallery of the steam generator. Before the flexib...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B08B9/032
CPCB08B9/0321B08B9/0325
Inventor 胡娜肖可陈建文张高剑
Owner CHINA NUCLEAR POWER OPERATION TECH