44results about How to "Avoid extensive damage" patented technology

The invention discloses a robot for deep-sea polymetallic nodule collection and a collection method. The robot comprises an underwater moving carrier and a collection module fixedly mounted on the underwater moving carrier, the collection module comprises a collection frame, a collection pump, a rack and a collection pipe, the collection frame is mounted at the bottom of the rack, the collection pump is a piston pump and comprises a piston and a cylinder with the lower end open, the upper portion of the cylinder is a collection area while the lower portion of the same is a piston stroke area,the collection pipe is connected on the cylinder of the collection area, a first one-way valve is arranged between the collection pipe and the piston stroke area in the cylinder, and a second one-wayvalve is arranged in the middle of the piston. An underwater moving function of the robot is realized through the underwater moving carrier, continuous collection of deep-sea polymetallic nodule through up-down movement of the piston in the collection pump, and the deep-sea polymetallic nodule after being collected enters the collection frame to be collected, so that nondestructive collection of the deep-sea polymetallic nodule is realized with high efficiency.

The invention provides a ship fender structure, comprising: a main body, an inner groove, a socket, an installation groove, inner parts, auxiliary parts and outer parts; the main body is a rectangular plate structure, and the main body is made of spring steel; The inner groove is located in the middle of the rear end of the main body; the inner groove includes side pieces; the inner groove is an arc-shaped structure; the side pieces are made of rubber material, and there are several round holes inside the side pieces; There are several conical contact pieces inside the round hole of the side piece; the main body is used to directly contact the hull, so that the main body can drive the device to be installed on both sides of the hull, so as to protect the hull. The main body is in use When it is used, multiple main bodies can be spliced ​​and fixed on the outside of the hull, so as to provide comprehensive protection, so that the device can be used on different hulls when in use, and can be spliced ​​freely according to requirements, and if a single main body is damaged At that time, the single main body can be removed for maintenance by manpower.

The invention belongs to the field of fixed buildings, and relates to a gradient mechanism shear wall structure and a construction method thereof. In this gradient mechanism shear wall structure, a low-strength concrete area and a rocking support are set between the reinforced concrete shear wall and the foundation. The upper support and the lower support are composed of protruding teeth on the lower end of the upper support, and grooves on the upper end of the lower support. The grooves and the protruding teeth cooperate with each other to ensure that the upper support can rotate around the side edge of the lower support. At the same time, the rocking support has the ability to resist compression and shear. The low-strength concrete area and the swing support in the wall of the present invention can make it have the dual functions of the traditional shear wall and the swing wall, and the transformation of the wall function mechanism is realized through the gradual withdrawal of the low-strength concrete area. The invention can effectively avoid the brittle shear failure and instability failure that are prone to occur in the traditional shear wall structure under the action of earthquake, and make the damage mechanism of the structure more clear and controllable.

The invention discloses a method for mechanical branch underground excavation construction of rectangular and quasi-rectangular cross-section underground engineering. A peripheral structure is divided into a plurality of branch structures through a section cutting plane perpendicular to the rectangular and quasi-rectangular cross-section; segmentation prefabrication is performed on each branch structure in the longitudinal direction perpendicular to the cross-section plane, and a plurality of segmentation prefabricated parts are obtained from each branch structure; the segmentation prefabricated parts are composed of permanent structural elements and temporary structural elements, the permanent structural elements are branch structure segmented blocks and are detachably connected with the temporary structural elements; guide rails and guide rail grooves are correspondingly positioned between the adjacent segmentation prefabricated parts, the guide rails are inserted into the guide rail grooves to perform adhesion of the adjacent segmentation prefabricated parts and guide positioning in the jacking process; an application tunneling device constructs a starting space and a receiving space; and jacking construction is performed on the segmentation prefabricated parts of each branch structure. According to the method, large rectangular and quasi-rectangular cross-section underground spatial engineering can be constructed safely efficiently, environmentally friendly and economically below roads and buildings.

The invention relates to the technical field of sand-fixing and repairing soil agents, in particular to a wind erosion-resistant modified polyurethane sand-fixing and repairing soil agent and a preparation method thereof. The sand-fixing and repairing soil agent is composed of A component of diatomite-modified lignin nitrate and B component composed of linear polyurethane prepolymer. Component A is: take water and polyethylene glycol according to the weight percentage, add polyethylene glycol into the water, and stir evenly to obtain a lignin derivative solvent; first disperse diatomaceous earth in the lignin derivative solvent, and then add Add lignin nitrate and stir at room temperature for 1-2 hours to obtain the product; component B is: add oligomer diol into diisocyanate, stir and mix well, then inject inert gas, add hydrophilic chain extender and Reaction with non-hydrophilic chain extender, that is. When in use, fully mix the two components of A and B and spray them on the surface of the mobile sand, and react to form a high-strength, high-toughness polyurethane material for sand-fixing and repairing.

A method for sampling root nodules of cherry blossoms by using a Luoyang shovel, the steps are: dig out the soil balls of the plants to be transplanted together with the roots, select a sampling point, and then use the prepared Luoyang shovel to carry out soil extraction, and the direction of soil extraction is towards the soil balls The center of the sphere, the soil depth is 1 / 2-3 / 5 of the radius of the soil ball; soil sample extraction and boxing; remaining soil backfill: put the remaining soil blocks in the Luoyang shovel head back into the pit for Backfill and compact; quickly detect sample disease. Through reasonable steps, the invention detects whether the tree has cherry root nodule disease without damaging the soil ball at the root of the tree in a large area, thereby ensuring the survival rate of transplanted plants in saline-alkali land.