3results about How to "Avoid secondary rework" patented technology

The utility model discloses a buckle type balcony temporary handrail base which comprises a handrail base body, the two sides of the handrail base body are bent by 90 degrees in the same direction to form bent faces, the handrail base body is clamped to a reversed beam of a balcony in a buckle shape after being bent, and bolt holes for bolts to penetrate through are formed in the two bent faces of the handrail base body. Bolts installed at the bolt holes in the two bent faces abut against the two side faces of the balcony reversed beam respectively so that the handrail base can be stably connected with the balcony reversed beam. And the steel pipe is vertically welded on the top surface of the handrail base and is used for bearing and inserting an external handrail vertical rod. Potential quality hazards such as hollowing caused by damage to the structure are avoided by changing the mounting mode of the handrail base, the handrail base is in a buckle shape after being bent, the bent handrail base is clamped with the reversed beam structure of the balcony and is stably connected with the reversed beam structure of the balcony through the bolts, the structural surface of the balcony cannot be damaged, and safety, stability and reliability are achieved. And later-stage materials can be recycled for multiple times, so that the cost is saved.

This invention provides a flexible sealing device for through-wall sleeves and its application method, belonging to the field of building construction technology. The device includes a template, a sleeve, a waterproof membrane, an annular airbag, and a support mechanism. The template has a through hole for the sleeve to pass through. The waterproof membrane is placed on the outside of the template. The annular airbag is fitted onto the outside of the sleeve and abuts against the outside of the waterproof membrane. The support mechanism is symmetrically arranged on both sides of the sleeve. A pressure sensor and a sensing optical cable are installed inside the annular airbag. A control box is installed on the outside of the annular airbag, and a controller is installed inside the control box. The pressure sensor and the sensing optical cable are electrically connected to the controller. This device can adapt to through holes of different shapes and sizes on the template, avoid grout leakage from the outer periphery of the sleeve, and has a good sealing effect. At the same time, it can detect the hollow phenomenon on the outside of the sleeve inside the wall. It is simple and convenient to use, effectively improves the concrete pouring quality at the sleeve, and increases the first-time acceptance rate.

The utility model relates to the technical field of door and window structures, in particular to a novel fireproof partition door and window structure. Comprising a window frame and a door frame which are fixedly connected, a fireproof door is rotationally arranged in the door frame, a door lock is fixedly arranged on the fireproof door, fireproof glass is arranged in the window frame, a containing groove is formed in the window frame, a fireproof expansion layer fixedly connected to the window frame is arranged on the edge of the containing groove, and the fireproof glass is installed in the containing groove. According to the fireproof door and window frame, the fireproof expansion layer is arranged in the containing groove, the fireproof expansion layer rapidly expands to form a compact carbonization layer when meeting fire, tiny gaps (smaller than or equal to 1 mm) between the door and window frame and the glass and between the door and window frame and the door plate are filled, permeation paths of flames, high-temperature gas (larger than or equal to 300 DEG C) and toxic smoke are blocked, the fire spreading time is prolonged to 90 minutes or above, and therefore the technical problem is solved.