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Secondary hole cleaning device and method of bottom of cast-in-situ bored pile

ActiveCN103696417AQuality is easy to guaranteeConcrete laitance reductionFlushingBulkheads/pilesRebarWater pipe
The invention provides a secondary hole cleaning device and method of the bottom of a cast-in-situ bored pile. The secondary hole cleaning device comprises an annular nozzle, a water guide pipe, a pump, a medium tank, an air compressor and an air pipe; the air pipe and the water guide pipe are fixedly connected with a reinforcement cage along the length direction of the reinforcement cage; one end of the air pipe is connected with the air compressor; the other end of the air pipe is inserted into the bottom of a bore hole; one end of the pump is connected with the medium tank; the other end of the pump is connected with one end of the water guide pipe; the other end of the water guide pipe is connected with the annual nozzle which is fixed at the bottom of the reinforcement cage. According to the secondary hole cleaning device and method of the bottom of the cast-in-situ bored pile, the working principle of underwater concrete casting is utilized, the technical method that sediment cannot be produced at the bottom of the bore hole before first concrete is cast is adopted, and accordingly sediment is not produced at the bottom of the cast-in-situ bored pile in the end and the concept that slurry needs to be replaced in the former secondary hole cleaning is changed; the problem that a waiting time is required to form the sediment from the secondary hole cleaning to the concrete casting formerly is solved; the quality of the cast concrete pile is easy to guarantee.
Owner:CHINA FIRST METALLURGICAL GROUP

Self-cleaning outdoor advertising board

The invention discloses a self-cleaning outdoor advertising board. The self-cleaning outdoor advertising board comprises a main rod, a lower fixing plate and an upper fixing plate, the lower fixing plate and the upper fixing plate are fixedly connected to the side wall of the main rod, an advertising board body is fixedly connected between the lower fixing plate and the upper fixing plate, a through hole is formed in the upper end of the main rod, and net plates are arranged at two openings of the through hole. An impeller, a magnetic sliding plug, a wiping mechanism, a spiral coil and a magnetic rod are arranged, when the wind power is large, the wind power drives the impeller to rotate, the magnetic sliding plug is pushed to slide up and down by magnetic force, and an elastic balloon isinflated and expanded, so a sliding ring is driven by a sliding block to slide along a fixed plate, a cleaning brush wipes the surface of the advertising board without manual cleaning, the danger thatthe advertising board is prone to falling off during manual cleaning is avoided, and the labor intensity of cleaning personnel is reduced; and meanwhile, colored lamps can emit light when the magnetic sliding plug slides, the attraction of the advertising board is enhanced, and the better advertising effect is achieved.
Owner:田园园
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