真牛牌倒三角龍門吊本產品主梁是用矩型鋼組焊成的桁架主梁結構，其橫截面輪廓為倒三角形。 該主梁與傳統(tǒng)正三角桁架相比有以下幾種優(yōu)勢： 1、 上下弦桿截面相差不大，形心位置靠近與截面中心線接近，受力更加合理。 2、腹桿系統(tǒng)為由原來的大部分為受壓桿件變成了大部分為受拉桿件，更充分利用了材料的性能。 3、腹桿采用矩形鋼：傳統(tǒng)正三角桁架用的角鐵在運輸或使用中遭碰撞和擠壓容易變形，導致安全隱患，矩形鋼抗側向沖擊力強，不易變形。 4、主梁截面是規(guī)則的三角形，可疊起來運輸，運輸方便。 5、制作工藝上比原來的正三角主梁焊接點和焊接量大大減少，減小了制作過程中產生的內應力危害。 6、本產品的支腿可以是鋼管腿、花架腿、包廂腿，用戶有很大的選擇空間。 The main beam of the produ is a truss girder struure which is welded by a reangular steel group,.the cross seion of the main beam is an inverted triangle. Compared with the traditional positive triangle truss, the main girder has the following advantages: 1, on the lower chord seion difference, centroid position near the seion center line, more reasonable stress. 2, the ventral rod system on the ground for the most part of the compression bar into a majority of the tension bar, more fully utilize the material properties. 3, the traditional reangular steel truss with triangular truss are: iron in transportation.use by collision.extrusion is easy to deform.cause safety hazards, anti lateral impa force of reangular steel is strong, not easy to deformation. 4, the main beam seion is a regular triangle, can be stacked up.transport, convenient transportation. 5, the produion process than the original triangle main beam welding point.the amount of welding is greatly reduced, reducing the produion process of internal stress. 6, this produ can be leg steel legs, legs, legs flower box, users have a lot of options.