61results about How to "Make sure to keep" patented technology

The invention discloses a preparation method and an application of main chain fracture type polyacrylic acid silane ester resin. The method comprises the following steps of: mixing a cyclic monomer, a vinyl monomer and a vinyl silane ester monomer in a solvent according to a proportion, and then, adding a composite initiator accounting for 0.01-5% of the total mass percent of the monomers, and reacting at a temperature of 25-150 DEG C under the protection of argon or nitrogen to prepare the main chain fracture type polyacrylic acid silane ester resin; and the monomers are composed of 5-95wt% of cyclic monomer, 0-90wt% of vinyl monomer and 5-95wt% of vinyl silane ester monomer. According to the resin obtained by the invention, the side chain silane ester can hydrolyze under the action of seawater and the polyester chain segment of a main chain can generate chain scission under the action of seawater, thereby solving the dependence of traditional self-polishing materials on navigational speed, effectively regulating and controlling a stain-proofing agent to release at a constant speed, maintaining active substances on the coating surface of a ship and well meeting the anti-fouling requirements of ships, submarines and offshore production platform facilities with low navigational speeds.

The invention discloses a laser cleaning device and a focus maintaining method thereof. The device includes: a control box and a mechanical module; the mechanical module includes a screw module, a servo motor, a laser cleaning head and a distance measuring sensor module; the control box A controller and a servo drive module are installed inside; the upper end of the screw module is connected to the servo motor through a coupling; the front slider of the screw module is connected to the laser cleaning head; the lower end of the screw module is connected to the distance sensor module; the control The controller is electrically connected to the servo motor through the servo drive module; the distance measurement sensor module measures the distance data between the screw module and the cleaning surface in real time and feeds it back to the controller, and the controller processes the distance data to generate the moving distance of the screw module , and drive the servo motor to run through the servo drive module, and then drive the screw module to adjust the position of the laser cleaning head. The invention realizes the maintenance of the laser cleaning focus on the surface of complex objects, thereby ensuring the cleaning effect and cleaning efficiency.

The invention discloses a flexible tower, which comprises a main buoyant air bag, a bearing air bag and a counterweight, wherein the main buoyant air bag is arranged above the bearing air bag, and the counterweight is arranged under the bearing air bag; the main buoyant air bag is connected with the bearing air bag through a first vertical rope, and the bearing air bag is connected with the counterweight through a second vertical rope; a plurality of inclined pulling ropes are arranged on the rim of the bearing air bag, the upper ends of the inclined pulling ropes are connected with the first vertical rope, and the lower ends of the inclined pulling ropes are connected with the ground. The flexible tower has high stability and quick and easy operation, so that the flexible tower can be quickly stood in the wild; a platform is effectively provided for bearing light measuring equipment or navigation channel and height markers, and the flexible tower can effectively substitute for the rigid tower, the equipment is convenient to be repaired at the same time, and the flexible tower is suitable for use in the wide.

Lock nut, comprising a nut body (2), in which there is a drill hole equipped with an internal thread for a bolt body equipped with an external thread. In the nut there are essentially axial cuts (12), which extend to the drill hole over part of its length, and locking claws (13) in the said cuts, to bite when pressed against the bolt, to prevent the nut from opening.

The invention discloses a chrome-plating method for the inner hole of a variable-diameter part. The inner hole of the part includes a conical hole section and a straight hole section. The small end of the conical hole is connected with the straight hole section and has the same diameter. Connect a long tube to each end of the part, lift the part to the plating tank for preheating; use the anode rod for chrome plating, adjust the starting position of the anode rod, perform anodic treatment, and then adjust the electroplating power supply to positive chrome plating; gradually increase to Under normal process conditions and current density, the anode rod reciprocates up and down on the surface of the inner hole of the part, and the set coating thickness is achieved by controlling the output current and the reciprocating times of the anode rod. The invention can effectively ensure that the anode rod remains in the center of the part and is coaxial with the part. It has the effect of improving the uniformity of coating thickness.