It’s used to test the impact resistance of manholes and inspection chambers. Place the complete chamber base on the vee block in such a way that at least a 30mm gap between base and block is achieved at point of impact. Unique modular design, including the sample support seat, lifting device, the protection of falling hammer device, power system, control unit. Vacuum hammer principle, suction, high efficiency. Hammer free fall, the impact of the sample, after the impact of timely capture hammer, and high-speed hammer to the impact of height, to prevent the impact of the second sample. Cantilever lifts structure design, with open test space, easy to sample installation. Before the impact, the falling hammer is adsorbed in the care tube, along with the care tube into the bottom of the bottom of the examination tank at the bottom of the tank, the protection of positioning, according to the impact of the key, falling hammer free fall, the impact of automatic control to capture the impact hammer, The hammer is again adsorbed inside the care tube. After the completion of the test tube will be raised, the operation safe and reliable. In the case of runner impact test, check the diameter of the well base: Ф315mm ~ Ф1600mm. Protection tube vertical installation, the wall roughness is less than 0.8, very low friction, drop hammer speed of not less than 95% of the theory. The protective tube positioning detection device is installed at the bottom of the care pipe so that the automatic descent of the protective tube stops at 50mm from the impact point, or it can be positioned at any point within the range of the stop key. Limit sensor dual redundant design applications, so that the protection of lifting and positioning control more secure and reliable. Technical Specification Model: HY4780Base dia.Launder impactФ315mm～Ф1600mmSidewall impactФ315mm～Ф1400mm Impact: height2.5m Impact: hammer sized90 Impact: hammer weight1.0KgPipe lifting travel1.5mPipe lifting speed1.2m/min Impact: hammer raising modeVac-sorbSpeed measuring deviceoptional Air source: 0.5 ~ 0.8Mpa Power supply: 220V, 50Hz Dimensions: 1950×1420×4700mm