6results about How to "Reduce demolition" patented technology

This utility model discloses a structure for a secondary lining in a mined tunnel that also serves as a shield tunneling starting reaction device. It includes a first primary support, a first secondary lining inside the first primary support, a second secondary lining on the sides of the first primary support and the first secondary lining, mortar anchor bolts on the outer side of the second secondary lining, a second primary support outside the second secondary lining, a shield machine front face on the right side of the first primary support, fiberglass anchor bolts inside the shield machine front face, and a concrete island platform at the bottom of the inner wall of the first secondary lining. The unit price of concrete is much lower than that of steel, and by utilizing the stress characteristics of concrete, costs are saved. Using a reinforced concrete structure reduces the structural dimensions and working space of the steel support, avoiding large-scale excavation. Furthermore, the reinforced concrete ring beam can later serve as a permanent secondary lining structure, reducing subsequent demolition, cutting, and other procedures and labor costs, further saving costs.

The application discloses a dry quenching coke oven baking method, comprising the following contents: (1) canceling the gas baking, changing to the red coke baking, through controlling the coke loading speed, the coke discharging amount, the circulating air volume, the impact of the red coke on the masonry is reduced to the minimum; (2) increasing the cold coke loading amount before the baking, ensuring that the coke can be normally discharged in the early baking period, and eliminating the risk of suspended material; (3) through the fine adjustment of the circulating air volume, the low-pressure steam volume, the air introduction amount and the opening degree of each diffusion valve, the problem of uneven temperature rise caused by the steam pressure and temperature fluctuation in the warm air drying process is eliminated. After the application is implemented, the baking time of the dry quenching coke is shortened from the original 15 days to 8 days, the gas baking is cancelled, the gas consumption of 9 days is saved, the production time is further shortened, the risk of suspended material in the baking process is eliminated, and the whole process is more stable and smooth.

The application discloses a jacking device and a jacking method for a ship roll-on / roll-off device, and relates to the technical field of lifting of a ship roll-on / roll-off device. The jacking device for the ship roll-on / roll-off device comprises a plurality of support tools, a plurality of hydraulic jacking devices and a master control device. The plurality of tool supports are arranged at intervals on the two sides of the roll-on / roll-off device to be jacked up, the tool supports are fixedly connected with the roll-on / roll-off device, and the bottom of each tool support is provided with a positioning structure. The plurality of hydraulic jacking devices are arranged below each tool support, the top of each hydraulic jacking device is matched with the positioning structure, and each hydraulic jacking device is used for jacking up the roll-on / roll-off device. The master control device is used for controlling the synchronous jacking of the plurality of hydraulic jacking devices. The jacking device provided by the application can realize the jacking of the roll-on / roll-off device without welding temporary lifting lugs or opening process holes on the movable deck, effectively reduces the processes of lifting lug welding, removal, repair welding and process hole opening and plugging, significantly reduces the construction workload, and improves the ship manufacturing efficiency.

This invention belongs to the field of DC grounding electrode technology, and specifically relates to a tree-shaped DC grounding electrode for smart grids and its design method. The technical solution is as follows: A tree-shaped DC grounding electrode for smart grids includes an electrode comprising a straight electrode trunk, several straight electrode branches located near the trunk, and an annular end electrode located near the other end of each straight electrode branch, with each branch corresponding to an annular end electrode; it also includes a central device or grounding electrode line terminal tower. The electrode is divided into several segments, each segment connected to a feeder cable, which is connected to the central device or grounding electrode line terminal tower via a conductor. This invention provides a tree-shaped DC grounding electrode for smart grids and its design method, ensuring the current discharge effect of the electrode while avoiding problems such as the need for large-scale demolition due to the surrounding of numerous buildings caused by the annular electrode arrangement.

The utility model provides a drum wall cleaning device for a wind power generation tower, and belongs to the technical field of cleaning devices. Comprising a cleaning frame, a cleaning plate is arranged in the cleaning frame, and a water tank assembly, a fixing frame, a heating plate, a heat insulation plate and a high-pressure water pump are arranged on the upper surface of the cleaning plate. The clamp is arranged to be in butt joint with the water pipe and fixed to one end of the water tank pipe, treated cleaning hot water is added into the cleaning water tank, the heating plate is started to heat and preserve heat of the cleaning hot water in the cleaning water tank, and the unmanned aerial vehicle motor enables the unmanned aerial vehicle fan blades to rotate to drive the unmanned aerial vehicle body to fly and move. The high-pressure water pump pumps cleaning hot water and sprays the cleaning hot water through the cleaning spray head at one end of the spray head pipe for cleaning, the cleaning hot water is used for cleaning the drum wall of the wind power generation tower, the hot water can quickly dissolve mixed stains such as mechanical oil stains accumulated on the drum wall, and the high-pressure hot water can physically peel off various sticky stains. Through the sensor on one side of the cleaning water tank, people can know whether cleaning hot water exists in the cleaning water tank.

This invention discloses a scaffold for shipbuilding, comprising a frame structure, a transverse support plate, casters, and diagonal bracing modules. The frame structure includes multiple spaced vertical members, multiple spaced transverse members, and a two-way stabilizing module. The vertical and transverse members are erected to form the frame structure, and are securely connected via the two-way stabilizing module. The transverse support plate is mounted on the transverse members. Casters are connected to the bottom of at least the vertical members located at the corners of the frame structure. The diagonal bracing module includes two diagonal bracing assemblies, which can apply opposite forces in the transverse direction to two vertical members. Each diagonal bracing assembly has a first end and a second end; the first end is connected to the corresponding vertical member, and the second end is connected to the external mounting surface of the scaffold. This scaffold can reduce the total time spent erecting and dismantling scaffolds during shipbuilding, thereby improving shipbuilding efficiency.