Manhole cover plate centering device and primary side manhole cover plate centering method for evaporator
A technology of manhole cover and centering device, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., and can solve problems such as difficulty in manhole cover centering
Pending Publication Date: 2020-07-07
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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Problems solved by technology
[0003] In order to overcome the problem of difficult centering of the manhole cover, the present invention provides a manhole cover centering device and a manhole cover centering method on the primary side of the evaporator
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[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] Such as Figure 3-5 As shown, the present invention provides a centering device for manhole covers, including an eccentric shaft device, a short sleeve 7 and a long sleeve 9, and the eccentric shaft device is composed of a lower support rod 1, a middle adjustment rod 2 and an actuator composition. The lower supporting rod 1 is sequentially connected with the middle adjusting rod 2 and the actuator. The short sleeve 7 is sleeved on the outside of the lower support rod 1 . Long sleeve 9 is enclosed within middle part adjusting rod 2 outsides.
[0029] Such as image 3 As shown, the lower support rod 1 is a cylinder of Φ25*75mm, and the center of the lower support rod 1 away from the middle adjustment rod 2 is provided with a threaded bottom hole 6 of M6*10mm. 1 axis coincides.
[0030] The middle adjustment rod 2 is a cylinder of Φ...
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The invention belongs to the technical field of manhole cover plate maintenance, and particularly relates to a manhole cover plate centering device and a primary side manhole cover plate centering method for an evaporator. The manhole cover plate centering device comprises an eccentric shaft device, a short sleeve and a long sleeve, the eccentric shaft device is composed of a lower supporting rod,a middle adjusting rod and an actuator, the lower supporting rod is sequentially connected with the middle adjusting rod and the actuator, the short sleeve is arranged on the outer side of the lowersupporting rod in a sleeving mode, the long sleeve is arranged on the outer side of the middle adjusting rod in a sleeving mode, and the actuator comprises a regular hexagonal body, an outer sleeve limiting boss and a through hole; and the through hole is formed in the regular hexagonal body, the opening direction of the through hole is perpendicular to the axial direction of the middle adjustingrod, the middle adjusting rod is sequentially connected with the outer sleeve limiting boss and the regular hexagonal body, and the axes of the regular hexagonal body and the outer sleeve limiting boss coincide with the axis of the middle adjusting rod. The manhole cover plate centering device is simple in structure, light in weight, simple in operation and easy to center, and the accurate and fast reassembly of a manhole cover plate is achieved.
Description
technical field [0001] The invention belongs to the technical field of manhole cover maintenance, and in particular relates to a manhole cover centering device and an evaporator primary side manhole cover centering method. Background technique [0002] During the refueling period of the nuclear power plant, it is necessary to disassemble the primary side of the steam generator and other manhole covers to check the internal components of the equipment. The primary side manhole of the steam generator is located below the steam generator, the centerline of the primary side manhole and the centerline of the steam generator form an included angle of 40°, and the primary side manhole cover plate of the evaporator is heavy. In addition, the position of the manhole on the primary side of the steam generator is not suitable for the staff to stay for a long time due to the high radiation dose. The above reasons all make it difficult to adjust the centering of various manhole covers i...
Claims
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IPC IPC(8): B23P19/10
CPCB23P19/10
Inventor 周伟杜岩松罗良华费志松王成林翁云峰孙勤
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT