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11. 发明专利

JP2001133585A PIPE MEMBER FOR SPENT NUCLEAR FUEL STORING RACK AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001133585A
公开(公告)日：2001-05-18
申请号：JP31156399
申请日：1999-11-01
申请人： MITSUBISHI HEAVY IND LTD
发明人： SAIDA TOMIKANE , HATTORI TAKAHIRO , KURIMURA TAKAYUKI
IPC分类号： G21C19/40 , G21C19/07
摘要： PROBLEM TO BE SOLVED: To provide a pipe member for a spent nuclear fuel storing rack for storing spent nuclear fuel in a reactor and a manufacturing method for the member, which are excellent in neutron absorbing characteristic and have a good property for the environment such as boric acid water. SOLUTION: An inner cylinder for storing a spent nuclear fuel assembly and an outer cylinder surrounding the inner cylinder through an intermediate layer are formed of stainless steel thin plate, and the intermediate layer is formed of raw material mainly composed of boron carbide to facilitate bending to constitute the pipe member for the spent nuclear fuel storing rack. Accordingly, the inner and outer cylinders formed by stainless steel thin plate excellent in corrosion resistance copes with the corrosive environment, and the raw material mainly composed of boron carbide of the intermediate layer copes with absorption of neutrons so as to obtain a suitable pipe member for the spent nuclear fuel storing rack which satisfies both corrosion resisting and neutron absorbing functions.

12. 发明专利

JPH10314622A DISCHARGE WIRE TENSION ADJUSTING METHOD AND DISCHARGE WIRE TENSION ADJUSTING FITTING OF ELECTROSTATIC PRECIPITATOR 失效
公开(公告)号：JPH10314622A
公开(公告)日：1998-12-02
申请号：JP12886597
申请日：1997-05-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： HATTORI TAKAHIRO , YOSHIMOTO KENTARO
IPC分类号： B03C3/41
摘要： PROBLEM TO BE SOLVED: To apply adequate deformation to deflected discharge wires and to obviate the degradation in fatigue strength by tightening the discharge wire by means of tension adjusting fittings after welding the discharge wires to a discharge frame, to deform the wires to smooth waveforms to absorb the deflection so as to adjust the tension of the discharge wires, applying the adequate deformation to the deflected discharge wires. SOLUTION: A waveform device 1 is used to adjust the tension of the discharge wire 11 by applying the plastic deformation thereto and has a stationary side tightening mold 3, a moving side tightening mold 4 and a ratchet mechanism 6. The discharge wire 11 is held between the stationary side tightening mold 3 and the moving side tightening mold 4 and is tightened by using the waveform device 1, by which the discharge wire 11 is deformed to the smooth wave shape and the deflection thereof is absorbed. Then, the local stress concentration of the deformed part of the discharge wire 11 is relieved. The deformation of the discharge wire 11 can be made with specified squeezing force by adjusting the sliding amt. of the moving side tightening mold 4 by using the ratchet mechanism 6 and therefore, the tension of the respective discharge wires 11 may be maintained nearly uniform.

13. 发明专利

JPH10113575A DISCHARGE WIRE MOUNT PART 失效
公开(公告)号：JPH10113575A
公开(公告)日：1998-05-06
申请号：JP26719196
申请日：1996-10-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： HATTORI TAKAHIRO , IKEGAMI YASUHIKO , MAEJIMA HIDEYUKI
IPC分类号： B03C3/41
摘要： PROBLEM TO BE SOLVED: To prevent the fatigue fracture of a discharge wire due to rapping stress and prevent deformation of the discharge wire due to its own weight after the fracture thereof by making a mount part of the discharge wire serve as a mount part between the discharge wire of a predetermined electrostatic precipitator and a mount frame thereof and by mounting a formed sheet metal including a plate spring and a hold part to reinforce the mount part. SOLUTION: The main parts of an electrostatic precipitator are discharge wires 1, discharge frames 2, and dust collecting plates, and the dust collecting plates and wires 1 are arranged alternately. In this case, in a welded part between the wire 1 and the frame 2, an L-shaped part 3A of a reinforcing metal 3 is hooked on the frame 2 so as to be mounted thereto. Further a bolt 4 mounted to the metal 3 is turned so that the part 3A is fixed to the frame 2 by the reaction forces of a recessed plate 9 and the forward end 3B of the metal 3 is brought into contact with the wire 1 through a plate 10 by the spring force of the plate 9. Thus vibration forces produced in the wire 1 can be reduced and hence fatigue fracture of the wire 1 can be prevented and deformation of the wire 1 due to its self-weight can be prevented at the time of the fracture thereof.

14. 发明专利

JPH1078025A ASSEMBLY TYPE CRANK SHAFT 失效
公开(公告)号：JPH1078025A
公开(公告)日：1998-03-24
申请号：JP23408596
申请日：1996-09-04
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIWARA MASAHARU , HATTORI TAKAHIRO , SAKAGUCHI KATSUHIKO
IPC分类号： F02B75/32 , F16C3/10
摘要： PROBLEM TO BE SOLVED: To restrain material and processing cost from increasing and improve fatigue strength of a fitting part by forming a protrusion part axially at an outer periphery continuous to the shrinkage fit part of a journal, protruding a crank web end surface axially to the end surface of the protrusion part, and forming an overhung part. SOLUTION: A protrusion part 12 protruding by an amount (a) axially from an axial surface 1c is formed on the shrinkage fit surface 11 side of the outer periphery of a journal 1, and the inner periphery of the protrusion part 12 is jointed smoothly to the round part 1d of a radius ρ, and the round part 1d is ground by an amount (e) from a bearing sliding surface 1b. The end surface 2a of a crank web 2 is protruded by an amount (b) axially to the end surface 1a of the protrusion part 12 to eliminate a fitted part at an overhung part (b). During running, the line of force 20 of repetitive stress moves to the interior side of the journal 1, and in a sliding range near the protrusion part 12, repetitive stress becomes lower, so that safety factor against fatigue failure rises. It is possible to provide material and processing cost reduction by reducing the diameter of the journal.

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