Sliding cross staff for measuring oblique beam
A right-angler and sliding technology, applied in the field of measuring tools, can solve the problems of low measurement accuracy, high cost, and easy damage
Active Publication Date: 2010-12-01
1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP +1
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Problems solved by technology
It is very convenient to use this measurement method to measure the center truss rectangular member, but for the hypotenuse truss, since it is necessary to visually judge the vertical line between the chord gusset plate spacing of the hypotenuse truss steel girder and the height of the web box mouth, Although this is convenient and fast, the measurement accuracy is very low, and the error is often above 5mm, which cannot meet the accuracy requirements required for construction. Second, use an electronic rangefinder for measurement. Using this method for measurement, although it can meet the accuracy requirements required for construction , but the cost is high, and the equipment is inconvenient to carry during use and is easily damaged
3. Use the square directly supplied on the market to measure. This measurement can accurately determine the vertical line of the gusset plate of the chord member of the hypotenuse truss steel beam member and the box opening of the diagonal web, but the square is of fixed length. Read It is difficult to obtain measurement data and is not operable
Method used
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[0015] Depend on figure 1 and figure 2 A sliding type right angler for measuring oblique truss members, including a right angler 4, the right angler 4 is composed of two mutually perpendicular long sides 2 and short sides 5, both of the long side 2 and the short side 5 are elongated, and the right angle The device 4 is two overlapping arrangements, and a ruler 1 with a scale is clamped in the middle of the two long sides 2 of the two right angle devices 4 in the same direction. As mentioned above, the initial scale β of the ruler 1 is located at the rear end side of the long side 2 , and the value of the initial scale β of the ruler 1 is the width value α of the short side 5 . A flange plate 6 is provided on the inner side end surface of the short side 5 . The two long sides 2 of the two right angles 4 are connected by the outer wrapping tape 3 , and the short sides 5 of the two right angles 4 are also connected by the outer wrapping tape 3 .
[0016] For the measurement o...
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The invention discloses a sliding cross staff for measuring an oblique beam. The sliding cross staff comprises two cross staffs, wherein the cross staffs consist of two vertical right-angled edges; the two cross staffs are overlapped; and the middle parts of the two opposite right-angled edges of the two cross staffs are provided with rulers with scales in the same direction. The sliding cross staff is a low-cost measuring tool for quickly, conveniently, accurately and practically measuring the space between steel girder chord gusset plates and the height of web member box rim so as to meet the steel girder assembling construction requirement.
Description
technical field [0001] The invention relates to a measuring tool, in particular to a measuring tool for measuring the opening size of a steel beam oblique member node and the height of a box opening at a diagonal member node. Background technique [0002] With the development of the country's economy and the rise of its strength, in addition to railway construction, road traffic construction and urban traffic construction have also developed rapidly in China. Steel structure bridges or bridges that use a large amount of steel are widely used in actual projects, and construction of Numerous well-known bridges, such as Wuhu Yangtze River Bridge, Jiangsu Jiangyin Yangtze River Bridge, Runyang Yangtze River Bridge, Shanghai Lupu Huangpu River, etc. [0003] The connection of steel structure bridges has also gradually developed from riveting to bolt welding connection, and the current overall node form. For steel structure bridges connected by integral nodes, the connection forms...
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IPC IPC(8): G01B5/14G01B5/02
Inventor 宋洪喜张耀李响王守昌张鹏裴闯梁涛王鹏都培阳李永旗
Owner 1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP