4 results about "Common Duct" patented technology

This invention relates to a simulation test method for grouting of prestressed concrete bridge ducts, characterized by the following specific test steps: S1: Test design; S2: Equipment and material preparation; S3: Test commencement. This method addresses the problem that common duct grouting construction techniques, processes, and requirements cannot meet the needs of new grouting materials and equipment, such as "grouting from the lowest point." Some construction techniques have theoretical flaws, such as "flushing the duct before grouting and blowing away accumulated water with high-pressure air," and some lack reliable theoretical and practical basis. Therefore, it is necessary to study the influencing factors of duct grouting construction techniques based on current grouting materials, summarize the main factors affecting duct grouting quality, and propose an operable grouting process method.

The application discloses a detachable suction plug device, which comprises a suction plug head and a pushing structure. The suction plug head comprises a suction plug proximal end arranged near the end of the pushing structure and a suction plug distal end with radial expansion performance. The suction plug distal end is an elastic structure. The outer diameter of the suction plug distal end after radial expansion is larger than the diameter of the suction plug proximal end. After radial expansion, the suction plug head is funnel-shaped with the diameter gradually decreasing from the suction plug distal end to the suction plug proximal end. The distal end of the pushing structure is not fixedly connected with the suction plug proximal end or is connected with the suction plug proximal end through a releasable structure. The suction plug head is internally provided with a suction plug cavity which is arranged in the axial direction. The suction plug head can be matched with a common catheter to realize the function of sucking and taking out the plug. The suction plug head can be directly arranged at the distal end of the catheter, so as to be combined with the catheter as a suction device. The suction device can be directly sucked through the catheter, the use is limited, the catheter cavity is less occupied while having a larger diameter, and a larger suction plug efficiency can be realized.

The utility model provides a medical high-efficiency indoor disinfection device, relates to the technical field of disinfection devices, and aims to solve the problems that when an existing hospital indoor disinfection device is used, disinfection gas is mostly conveyed through a ventilation pipeline, but the ventilation pipeline needs to carry out ventilation treatment on a ward in daily use, so that the air quality of the ward is improved, and the use cost is high. The problem that a ventilation path and a disinfection path are used for a common pipeline, and the disinfection effect of disinfection gas on a ward is affected due to mixed use of the interior of the pipeline is solved. And a disinfection part is arranged at the top of the ventilation part. The ventilation opening and the telescopic opening are formed in the external shell, so that a disinfection path and a ventilation path are conveniently separated, mutual influence between the two paths is avoided, the ventilation opening is matched with a partition plate to conduct ventilation treatment on indoor air, and an external spraying frame is installed through the telescopic opening; the device can be conveniently adjusted and treated through stretching and retracting, so that indoor disinfection treatment is facilitated.

The present invention provides a device for recovering and utilizing the energy of backflowing oil and smoke, belonging to the technical field of range hoods. The device comprises a range hood body, an external exhaust duct, a connecting duct, and a common duct, arranged sequentially from the inside out. A flue check valve is provided at the connection between the connecting duct and the external exhaust duct. An energy recovery mechanism is provided on the side of the connecting duct close to the common flue. A self-cleaning mechanism for cleaning the flue check valve is provided on the side of the connecting duct close to the external exhaust duct. When smoke flows back from the common flue into the connecting flue, the energy recovery mechanism recovers the smoke energy. The energy recovery mechanism can absorb and utilize the smoke energy when the smoke flows back into the connecting flue, and can simultaneously consume the kinetic energy of the smoke to reduce the amount of oil in the smoke adhering to the flue check valve. The self-cleaning mechanism can clean the flue check valve when the smoke flows back, achieving dual cleaning of oil stains on the flue check valve and oil smoke entering the connecting flue.