Emergency tripping device of reactor control rod assembly

Abstract

The invention relates to an emergency tripping device of a reactor control rod assembly. The emergency tripping device is used for pulling up the head of a drive rod to separate the drive rod from a trip of a control rod assembly, wherein the head of the drive rod is provided with a concave groove. The emergency tripping device comprises an inner cylinder, upper hooks, an upper sleeve and a pull bar, wherein the inner cylinder is arranged right in the middle, the pull bar which is driven by the inner cylinder to move up and down is connected with the inner cylinder and arranged below the inner cylinder, the two sides of the pull bar are respectively provided with the upper hooks; the central portions of the upper hooks are connected with the upper sleeve though a revolving shaft and move up and down with the upper sleeve; the upper portion, middle portion and lower portion of the same side which belongs to the upper hooks and is close to the tail end of the pull rod are respectively provided with an upper embossment, a middle embossment, and a lower embossment, the tail end of the pull rod is arranged at a position where the pull rod can poke at the middle embossment and the upper embossment, and the lower embossment is matched with the groove of the head of the drive rod and is embedded in the drive rod. When the control rod assembly is pulled out by accident, the emergency tripping device is adopted, by using the pull rod to clamp the drive rod and pulling up, the tripping operation between the control rod assembly and the drive rod is completed.

Description

technical field [0001] The invention relates to the field of reactor nuclear power, in particular to an emergency release device for a reactor control rod assembly. Background technique [0002] The start-up, power regulation, and shutdown of the reactor need to rely on multiple control rod assemblies moving up and down in the reactor. like figure 1 As shown, the upper end of each control rod assembly 2 is connected to a driving rod assembly, and the driving rod assembly is mounted on the upper member 3 in the stack. Wherein, the driving rod assembly includes a driving rod 4 centrally connected with the control rod assembly 2 and a driving rod sleeve covered on the driving rod 4, and the driving rod 4 is connected with the control rod assembly 2 through a fastening mechanism. The mechanism is such that when the driving rod 4 is pulled upwards relative to the driving rod sleeve, the driving rod 4 is released from the control rod assembly 2, and the control rod assembly 2 le...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention lies in that, in view of the prior art, when the tripping tool on the superstructure in the reactor fails and the control rod assembly fails to trip and is accidentally pulled out of the core, the tripping tool cannot be maintained to realize normal operation. The defect of tripping provides an emergency tripping device for a reactor control rod assembly that is hoisted to the drive rod assembly to realize emergency tripping when the above situation occurs

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