Shallow modulus formula bridge telescoping device that buries

The utility model provides a shallow modulus formula bridge telescoping device that buries, includes boundary beam, zhong liang, sealing rubber area, displacement control case, pressure -bearing support and supporting beam, the displacement control case is established respectively in the install groove at roof beam body both ends, the supporting beam passes through the displacement control incasement of pressure -bearing bearing installation at both ends, well roof beam is installed on the supporting beam middle section, the boundary beam is installed respectively at roof beam body both ends terminal surface, and be connected sealing rubber between boundary beam and the well roof beam and take, the boundary beam inlay in the displacement control box with displacement control case fixed connection, well roof beam inlays at the internal and supporting beam fixed connection of supporting beam roof beam. The pressure -bearing support adopts self -lubricating wear -resistant material to make, and pressure -bearing support thickness is 2.4mm, the whole of telescoping device highly reduces to 150mm. The thickness that this telescoping device need not special deepened beam end of body can adapt to present major part and newly design the shallow installation of burying the notch of the roof beam body, the device consumptive material is few, light in weight, the connection is reliable, intensity is high, longe -lived, with low costs.