CN205975550U

CN205975550U - A pinhole of falling pyriform for cylinder spud leg

Info

Publication number: CN205975550U
Application number: CN201620819457.XU
Authority: CN
Inventors: 陈艳; 冯琦; 向溢; 范洪伟; 孙广耕; 陈志梅
Original assignee: Honghua Offshore Oil & Gas Equipment (jiangsu) Co Ltd
Current assignee: Honghua Offshore Oil & Gas Equipment (jiangsu) Co Ltd
Priority date: 2016-08-01
Filing date: 2016-08-01
Publication date: 2017-02-22
Anticipated expiration: 2026-08-01

Abstract

The utility model discloses a pinhole of falling pyriform for cylinder spud leg, pinhole include arc surface and lower arc surface, go up the arc surface and pass through the tangent plane with arc surface down and is connected, and the circular arc angle that goes up the arc surface is greater than 180 degrees, and the circular arc angle of lower arc surface is lighter than 180 degrees, go up the arc surface diameter be greater than under the arc surface diameter, the tangent plane both ends are tangential point I and tangential point II, the utility model discloses two sections arc surfaces pass through the tangent plane and connect, facilitating machining, adopt arc shape's trompil, be favorable to the load transmission, shang mian adopt great circular arc, make things convenient for the bolt when inserting the pinhole from upper portion, the phenomenon that the card pauses can not appear, the following adoption and the equally big circular structure of round pin axle, make the round pin axle can with the seamless laminating of lower part pinhole, the lifting surface area has been increased, stress concentration can not appear, the greatest stress value of pinhole has effectively been reduced, can reduce the steel material grade of spud leg even, the material cost of spud leg has very effectively been reduced, the round pin axiform formula that corresponds is with fairly simple, facilitating machining.

Description

A kind of pin-and-hole of falling pyriform for cylindrical shape spud leg

Technical field

This utility model is related to a kind of pin-and-hole of falling pyriform form being applied to jack-up unit cylindrical shape spud leg, belongs to from liter Formula platform leg design field.

Background technology

For the jack-up unit of middle deep water, such as self-elevating drilling platform, jack up service platform, wind-powered electricity generation mounting platform Deng typically using cylindrical shape spud leg.Jack-up unit either jacking condition still lifting state, the weight of jack-up unit Amount, changing load and operation load are required for being delivered on spud leg pin-and-hole by bearing pin, then the pin-and-hole of spud leg bear huge Load, single lower limb load of some platforms is up to more than 8000 tons it means that each pin-and-hole bears load up to a few kiloton.If Using circular pin-and-hole form, for the ease of operation, then the diameter of circular bearing pin requires less than pin-and-hole, and pin-and-hole bearing pin is not Contact area can be caused very little with footpath, thus causing pin-and-hole stress concentration, some jack-up units even can therefore improve The material of spud leg, drastically increases the construction cost of spud leg.And if using the square pin well format with chamfering although increasing Contact area, but still it is the problem having stress concentration in the position of corner, and also square opening is overall strong to spud leg Degree weakening ratio is more serious.

Utility model content

The purpose of this utility model is to provide a kind of pin-and-hole of falling pyriform for cylindrical shape spud leg.

The technical solution adopted in the utility model is：

A kind of pin-and-hole of falling pyriform for cylindrical shape spud leg it is characterised in that：Described pin-and-hole includes arc surface and lower circle Cambered surface, described upper arc surface is connected by tangent plane with lower arc surface, and the arc angle of described upper arc surface is more than 180 degree, described The arc angle of lower arc surface is less than 180 degree, and with diameter greater than lower arc surface diameter, described tangent plane two ends are to cut to described upper arc surface Point I and point of contact II.

Described upper arc surface is respectively the center of circle I, the center of circle II with the center of circle of lower arc surface, and the described center of circle I, the center of circle II are at one On axis.

Advantage of the present utility model：Two sections of arc surfaces are connected by tangent plane, are easy to process, using the perforate of circular shape, Be conducive to load transmission, larger arc is used above, facilitate latch when being inserted from above pin-and-hole, be not in showing of interim card As below using big arc structure the same with bearing pin so that bearing pin can be seamless applying with bottom pin-and-hole, increased stress surface Long-pending, be not in stress concentration, effectively reduce the maximum stress value of pin-and-hole it might even be possible to reduce steel material of spud leg etc. Level, the highly effective material cost reducing spud leg, corresponding bearing pin form, with fairly simple, is easy to process.

Brief description

With reference to the accompanying drawings and detailed description this utility model is described in further detail.

Fig. 1 is structural representation of the present utility model；

Fig. 2 inserts the first step of pin-and-hole for this utility model latch；

Fig. 3 inserts the second step of pin-and-hole for this utility model latch；

Fig. 4 inserts the 3rd step of pin-and-hole for this utility model latch.

Wherein：1st, upper arc surface；2nd, lower arc surface；3rd, point of contact I；4th, point of contact II；5th, tangent plane；6th, latch；7th, the center of circle I；8、 The center of circle II.

Specific embodiment

As Figure 1-4, a kind of pin-and-hole of falling pyriform for cylindrical shape spud leg, pin-and-hole includes arc surface 1 and lower circular arc Face 2, upper arc surface 1 is connected by tangent plane 5 with lower arc surface 2, and the arc angle of upper arc surface 1 is more than 180 degree, about 200 degree Left and right, the arc angle of lower arc surface 2 is less than 180 degree, and about 150 degree about, upper arc surface 1 is straight with diameter greater than lower arc surface 2 Footpath, tangent plane 5 two ends are point of contact I 3 and point of contact II 4, and upper arc surface 1 is respectively the center of circle I 7, the center of circle II 8 with the center of circle of lower arc surface 2, The center of circle I 7, the center of circle II 8 are on an axis.

In the lifting process of platform, latch is firstly inserted into the region of orthodrome center concentric of making peace greatly, such bearing pin Spacing and pin-and-hole orthodrome between about 20mm about gap, be especially advantageous for the insertion of latch, even if latch or pin There is slight deformation in hole, nor affects on the update of latch, the situation substantially as shown in Figure 2 of the position after insertion, then latch Continue to move downward, near the region of small arc-shaped, as shown in figure 3, the end of orthodrome and tangent plane serve in the process and lead To effect so that pin-and-hole can smoothly move downward, be not in deviate or the phenomenon that gets stuck, then bearing pin continue past Lower motion, crosses point of contact I, and until bearing pin touches the bottom of pin-and-hole, now bearing pin can completely attach to lower arc surface, wherein The contact area of bearing pin and pin-and-hole is the region between two point of contacts II.

Two sections of arc surfaces of this utility model are connected by tangent plane, are easy to process, and using the perforate of circular shape, are conducive to carrying Lotus is transmitted, and larger arc is used above, facilitates latch when being inserted from above pin-and-hole, be not in the phenomenon of interim card, adopt below With big arc structure the same with bearing pin so that bearing pin can be seamless applying with bottom pin-and-hole, increased lifting surface area, will not go out Existing stress concentration, effectively reduces the maximum stress value of pin-and-hole it might even be possible to reduce the steel material rate of spud leg, highly effective Reduce the material cost of spud leg, corresponding bearing pin form, with fairly simple, is easy to process.

Claims

1. a kind of pin-and-hole of falling pyriform for cylindrical shape spud leg it is characterised in that：Described pin-and-hole includes arc surface and lower circular arc Face, described upper arc surface is connected by tangent plane with lower arc surface, and the arc angle of described upper arc surface is more than 180 degree, described under The arc angle of arc surface is less than 180 degree, and with diameter greater than lower arc surface diameter, described tangent plane two ends are point of contact to described upper arc surface I with point of contact II.

2. a kind of pin-and-hole of falling pyriform for cylindrical shape spud leg according to claim 1 it is characterised in that：Described upper circular arc Face is respectively the center of circle I, the center of circle II with the center of circle of lower arc surface, and the described center of circle I, the center of circle II are on an axis.