# US 2013/0152385 A1 · Clamper and in-channel-head operation device

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- Number: US 2013/0152385 A1
- Document ID: US20130152385A1
- Status: Published application
- Kind: A1
- Application number: 13/818,524
- Filed: 2011-07-28
- Published: 2013-06-20
- Earliest claimed: 2010-08-23
- Assignees: Mitsubishi Heavy Industries, Ltd.
- Inventors: Atsushi Kamiyoshi; Jun Fujita; Hidekazu Tanaka
- Web page: https://patentgrep.com/patent/US20130152385A1

## CPC

- G21D 1/02: Arrangements of auxiliary equipment
- B23P 19/022: {Extracting or inserting relatively long parts}
- B23P 19/025: {For detaching only}
- B23Q 1/009: {the receiving hole being cylindrical or conical}
- F22B 37/003: {Maintenance, repairing or inspecting equipment positioned in or via the headers}
- F22B 37/005: {Positioning apparatus specially adapted therefor (F22B37/64 takes precedence)}
- F22B 37/20: Supporting arrangements, e.g. for securing water-tube sets
- G21C 17/01: Inspection of the inner surfaces of vessels
- G21D 1/006: {primary side of steam generators (secondary side of steam generators F22B1/00, F22B35/00 or F22B37/00)}
- B25B 5/087: {actuated by a hydraulic or pneumatic piston}
- Y02E 30/00: Energy generation of nuclear origin
- Y02E 30/30: Nuclear fission reactors
- Y10T 29/53113: Heat exchanger
- G21D: NUCLEAR POWER PLANT
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- F22B: METHODS OF STEAM GENERATION; STEAM BOILERS
- G21C: NUCLEAR REACTORS (fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J)
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A clamper (23) includes a clamp mechanism (231) which inserts an insertion portion (2311a) into a tube member and clamps the tube member and a lifting and lowering mechanism (232) which lifts and lowers the clamp mechanism (231) in the insertion direction of the insertion portion (2311a). The clamp mechanism (231) includes a clamp body (2311) which has the insertion portion (2311a), a cotter (2312) which protrudes from the insertion portion (2311a) to come into friction-contact with the tube member and is movable in a reciprocating manner in the insertion direction of the insertion portion (2311a), a piston rod (2313) which presses the cotter (2312) so that the cotter protrudes from the insertion portion (2311a) when being pulled toward the opposite side to the insertion direction of the insertion portion (2311a), and a rod cylinder (2315) which is integrated with the clamp body (2311) and pulls the piston rod (2313).

## Claims

### Claim 1

A damper comprising: a clamp mechanism which inserts an insertion portion into a tube member and clamps the tube member; and a lifting and lowering mechanism which lifts and lowers the clamp mechanism in the insertion direction of the insertion portion, wherein the clamp mechanism includes a clamp body which includes the insertion portion, a cotter which protrudes from the insertion portion so as to come into friction-contact with the tube member and is disposed so as to be movable in a reciprocating manner in the insertion direction of the insertion portion, a piston rod which presses the cotter so that the cotter protrudes from the insertion portion when being pulled toward the opposite side to the insertion direction of the insertion portion, and a rod cylinder which is integrated with the clamp body and pulls the piston rod.

### Claim 2 (depends on 1)

The damper according to claim 1, wherein the piston rod passes through the rod cylinder and protrudes toward a rear end portion of the rod cylinder.

### Claim 3 (depends on 1)

The damper according to claim 1, further comprising: a pressurizing device which is connected through a tube to a fluid chamber that pulls the piston rod by the pressurization of a working fluid among fluid chambers of the rod cylinder and pressurizes the working fluid of the fluid chamber; a check valve which is disposed on the tube; and a release valve which discharges the working fluid of the fluid chamber.

### Claim 4 (depends on 1)

The damper according to claim 1, wherein the clamp mechanism includes a cotter diameter decreasing structure which decreases the diameter of the cotter.

### Claim 5 (depends on 4)

The damper according to claim 4, wherein the cotter diameter decreasing structure includes a tapered surface which is formed on the cotter and an elastic member which biases the tapered surface to the clamp body and decreases the diameter of the cotter by sliding the cotter along the tapered surface by the biasing force from the elastic member.

### Claim 6 (depends on 4)

The damper according to claim 4, wherein the cotter diameter decreasing structure includes an annular elastic member which is fitted to the outer periphery of the cotter.

### Claim 7 (depends on 1)

An in-channel-head operation device comprising: the damper according to claim 1.