| 摘要 |
The invention discloses a lift type deformation observing device, comprising an outer rod and an inner rod, wherein the outer rod moves up and down relative to the inner rod; a clamping ring is fixed at the lower end of the outer rod; external threads are arranged at one end (exposed out of the outer rod) of the clamping ring; a plurality of shrinking grooves are formed on the external threads along a circumferential direction; a clamping nut is also sleeved on the clamping ring; the clamping nut is threadedly connected with the clamping ring; and a first joint is fixed at the lower end of the inner rod. Because a surveyor's pole provided by the invention is in a lift type, the shortcoming that a shelter shelters a surveyor's beacon is overcome and the limitation of geographical positions is broken through. Therefore, the lift type deformation observing device can be applied to the deformation observation of various buildings. The observation height can be determined according to needs; and the lift type deformation observing device has the advantages of good effect, light weight and convenience to carry. |
