32results about How to "Strong water pressure resistance" patented technology

The invention discloses a preparation method and an application of environment-friendly type shield tail sealing grease. The shield tail sealing grease mainly comprises the following components: 14-30% of lubricating oil, 7-22% of oil plasticizer, 3-15% of thickening agent, 3-12% of lubricating grease, 3-8% of natural degradable fiber, 35-60% of filling granular material, 1-3% of coloring agent and 0.1-2% of preservative. The environment-friendly type shield tail sealing grease prepared by using the method is used for sealing a shield tail of a shield tunneling machine in tunnel engineering, and has the advantages of good water pressure sealing performance, excellent pumping performance, high adhesivity, good lubrication, stable properties, no corrosion, antioxidation, wide raw material resources, environment-friendliness and simple preparation process.

The invention discloses an environment-friendly building waterproof paint with a low content of VOC (volatile organic compound) and a preparation method thereof. The paint comprises the following components in parts by weight: 3 to 6.5 parts of water, 0.01 to 0.05 part of thickening agent, 0.25 to 0.55 part of dispersant, 0.4 to 0.8 part of antifoaming agent, 0.05 to 0.25 part of multifunctional auxiliary agent, 0.05 to 0.15 part of antiseptic, 3 to 6 parts of titanium dioxide, 25 to 45 parts of filling material, 30 to 60 parts of emulsion, and 1 to 2 parts of rheological additive. The paint is prepared by a ternary compounding technology, which compounds three components: low-VOC pure acrylic emulsion, low-VOC vinyl acetate-ethylene emulsion, and soap-free organic silicon rubber emulsion; a VOC-free composite rheological system blending technology and a composite silver ion sterilizing and anticorrosion technology. The paint has the advantages of low VOC content, green, no toxicity, high strength, convenience in construction, and stableness in storage.

The invention discloses a sound production device and electronic equipment, the sound production device comprises a vibration system and a magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises: a vibrating diaphragm, wherein the vibrating diaphragm is made of rubber; a composite layer, wherein the center of the vibrating diaphragm andat least part of the composite layer are integrally formed; and a voice coil assembly, wherein the voice coil assembly is connected to one side, deviating from the vibrating diaphragm, of the composite layer, and the voice coil assembly is movably arranged in the magnetic gap. According to the technical scheme, the connecting effect of the vibrating diaphragm and the dome is guaranteed, the reliability of the loudspeaker is improved, and the quality of the loudspeaker is guaranteed.

The invention discloses a waterproof binding material. According to the invention, inorganic materials such as silicate cement, quartz sand and the like are adopted as base materials. Active compound permeable crystalline masterbatch, polymer and various other auxiliary materials are blended into the base material, such that a powdery waterproof material is obtained. The composite waterproof system provided by the invention is composed of the waterproof binding material and a macromolecular polyethylene polypropylene waterproof coiled material. Two surfaces of the macromolecular polyethylene polypropylene waterproof coiled material are composed of high-density polypropylene filament non-woven fabrics. A main water proof layer is prepared from the process of adding an anti-aging agent, a stabilizing agent, an auxiliary agent, and the like into linear low-density polyethylene. According to the invention, a composite waterproof system with an optimal waterproof effect is selected from various possible binding materials and waterproof coiled materials. As a result of testing, the composite waterproof system provided by the invention has excellent permeation resistance, excellent water-pressure resistance, excellent corrosion resistance, excellent aging resistance, excellent self-repairing capacity and excellent environment protecting characteristic.

The invention discloses an underwater drilling fast blockage air bag, comprising an air bag body made of rubber; a cylindrical bulge is arranged at the top of the air bag body; an air inlet/outlet is formed in the outer wall of the cylindrical bulge; the air inlet/outlet is communicated with the inner cavity of the air bag body by a channel arranged in the cylindrical bulge; an air guide pipe is arranged at the air inlet/outlet, and the other end of the air guide pipe is provided with a control valve; a connection ring is sleeved on the air bag body; the connection ring is positioned at the upper part of the air bag body; a plurality of connection ropes are uniformly distributed along the circumferential direction of the connection ring; a falling weight is arranged at the tail end of each connection rope. The underwater drilling fast blockage air bag is good in blockage effect, can block an underwater geological drilled hole with failure in very short time, and the implementation method is simple and feasible.

The invention provides a preparation method of environmentally-friendly shield tail grease. The preparation method comprises the following steps: 1) mixing base oil, a tackifier and a pumpability improver, then heating to 50-100 DEG C, and stirring to mix uniformly; 2) adding an enhancer, keeping warm and stirring for 40-60 min; and 3) adding a filler and a lubricant, and stirring for 90-180 min at 50-100 DEG C.

The invention relates to the field of water cooling systems in power electronics, in particular to a novel water cooling system joint. The joint comprises a double-end screw and a locking nut, wherein the interior of the double-end screw is a hollow screw; two tapered bushings are arranged between the double-end screw and the locking nut; the circle centers of the bushings are superposed with the axis of the double-end screw; the tapered face shape of one bushing is as same as the internal shape of one end of the double-end screw; and the tapered face shape of the other bushing is as same as the internal shape of one end of the locking nut. The joint has the characteristics of reliable, reasonable and simple structure, simplicity in operation, low cost and the like.

The invention discloses an adhesive for water pipes and a preparation method thereof. The preparation method includes the steps that after acacia gum, sodium alga acid, phenolic resin, alkyd resin and polyvinyl chloride are mixed and stirred, a basic mixed solution M is formed; after the basic mixed solution M, white carbon black, an emulsifying agent and a stabilizer are mixed, the adhesive for the water pipes is obtained. By the adoption of the adhesive for the water pipes and the preparation method thereof, the problems are solved that when a current adhesive is adopted to connect adjacent plastic pipes, the needed curing time is relatively long, and besides, it is difficult for glued pipelines to meet the requirements for high-pressure pipelines in the aspect of bearing water pressure.

The invention discloses an application method of a tunnel longitudinal construction joint cement-based crystallization type waterproof material. The application method comprises the steps that the cement-based crystallization type waterproof material is adopted, the material is blended to be in a cement mortar shape according to the water cement ratio of 0.3:1 and then brushed to the joint of a water-stop belt buried in a tunnel longitudinal construction joint and cement concrete, a gap between a longitudinal water-stop belt and inverted arch concrete is filled up, and the waterproof effect isachieved. According to the adopted application method of the tunnel longitudinal construction joint cement-based crystallization type waterproof material, the permanent and double waterproof performance, the extremely high water-pressure resistant capability, the reinforcing action to a concrete structure and the like of the cement-based crystallization type waterproof material are utilized to blend the water cement ratio again, then the material is brushed to the longitudinal construction joint, coating construction is simple, the waterproof capability and the construction efficiency of a tunnel inverted arch and the secondary lining longitudinal construction joint are greatly improved, and the construction quality is ensured.

The invention provides a connector plug and a watertight connector comprising the connector plug. One end of the connector plug is provided with a protrusion and a groove. The groove is used for inserting a projection of another connector plug adapted to the connector plug. By providing a protrusion 6 and a groove 11 at one end of the connector plug, the groove 11 is used for inserting the protrusion 6 of the other connector plug adapted to the connector plug. When the two connector plugs of the watertight connector are inserted, the sealing property of the watertight connector is enhanced, and the watertight connector is structurally strong against water pressure, and is suitable for deep water operation.

The invention relates to the technical field of underwater construction, in particular to an expansion plug convenient to install and dismantle and application. A hole runs through a cylindrical expansion plug main body, the front end of the hole is provided with an inversely conical opening matched with an inversely conical plug body in size, a lead screw is inserted into and penetrates through the expansion plug main body, the inversely conical plug body is mounted at the front segment of the lead screw, the rear portion of of the expansion plug main body is connected with a baffle the diameter of which is greater than that of the expansion plug main body, the inversely conical plug body is connected to the baffle through the lead screw, the rear end of the expansion plug main body is connected with a compass with a clamping opening, and the rear end of the lead screw penetrates through the compass. The expansion plug can be applied to the situation that holes cannot be sealed by conventional processes when the underwater construction operation is limited; at the same time, the application can be adopted for effectively solving the situation that the holes are needed to be reusedfor the construction work after treatment, the water sealing effect is good, the capability of resisting water pressure is great, and the expansion plug is very easy to dismantle.

The invention discloses a pipe roofing heave monitoring system and method applied to pipe roofing box culvert construction, and relates to the technical field of pipe roofing box culvert jacking construction. The pipe roofing heave monitoring system comprises inclination angle sensors which are bonded and fixed in a steel pipe at equal interval in the length direction of the steel pipe, and the inclination angle sensors are connected with a communication line in series; the system further comprises a controller located on a concrete base layer, a plurality of sets of communication lines penetrating out of the steel pipes are in communication connection with the controller, and the controller is in communication connection with a far-end server. Inclination angle data information of each monitoring point is measured by the inclination angle sensor, and then analysis is carried out according to the inclination angle data information, so that observation of the heaving of the pipe roofingcan be effectively, stably, simply and economically realized.

Provided are a gas diffusion electrode and a preparation method thereof. The gas diffusion electrode comprises a current collector 1, a gas diffusion layer 2, a gas catalysis layer 3 coated on the gas diffusion layer, and a liquid guide layer 4 located on the gas catalysis layer. The gas diffusion layer comprises highly-graphitized carbon black and polytetrafluoroethylene, and the gas catalysis layer comprises a catalyst, acidified highly-graphitized carbon black and polytetrafluoroethylene; the highly-graphitized carbon black has a peak intensity ratio I D /I G between 0.3 and 1.0 in the Raman spectrum, and the degrees of graphitization in the gas diffusion layer and the gas catalysis layer may be the same or different. The gas diffusion electrode has good corrosion resistance and excellent and stable electrochemical performance in alkali solutions, thus it is suitable for electrolytic reactions in the chlor-alkali industry.