34results about How to "Not easy to seal" patented technology

The invention discloses a nanometer electromechanical vector hydrophone suitable for deep water. The nanometer electromechanical vector hydrophone further improves the sealing property, the high hydrostatic pressure resistance, the environmental suitability, the reliability and the similar indexes of an MEMS vector hydrophone. The nanometer electromechanical vector hydrophone comprises a stainless steel circuit tube shell, a necking tube shell, a fixed disc and an insulated annular tray, wherein the insulated annular tray is provided with a lug boss, the lug boss is provided with a round PCB board and a detecting chip, the insulated annular tray is formed with a sealing screw hole and a signal screw hole and is firmly connected with an acoustic cap, the acoustic cap is filled with silicon oil and antifoaming agent, and a support frame is arranged in the acoustic cap. The nanometer electromechanical vector hydrophone prevents the acoustic cap from deformation under high pressure and bubbles, enables the acoustic cap to be resistant to high hydrostatic pressure, and improves the environmental suitability, the underwater sound signal testing reliability, practicability, stability and so on. Under the high pressure, the internal pressure and the external pressure of the acoustic cap are balanced so as to bear the high hydrostatic pressure; the hydrostatic pressure resistance test proves that the nanometer electromechanical vector hydrophone is capable of working normally under the hydraulic pressure more than or equal to 20 Mpa.

The invention discloses a leakage-proof leak-stopping filler. The leakage-proof leak-stopping filler comprises the following raw materials in parts by weight: 6 to 15 parts of aluminum hydroxide, 8 to20 parts of silica powder for ceramic, 10 to 25 parts of talcum powder, 4 to 10 parts of sodium silicate, 10 to 20 parts of nano calcium carbonate, 2 to 10 parts of superfine calcium carbonate, 4 to20 parts of bluestone powder, 2 to 8 parts of graphite, 2 to 10 parts of white asphalt and 3 to 10 parts of calcium oxide. The preparation method comprises the following steps: sequentially adding thesubstances into a container according to the parts by weight at normal temperature and normal pressure, uniformly mixing and stirring, and drying, crushing or sieving to obtain a granular product with the particle size of 0.05-0.8 mm. The raw materials are widely available; both physical filling and chemical micro-coagulation effect are realized; the leakage-proof leak-stopping filler can be dissolved in liquid, and enter into micro cracks along with liquid phase to form micro-gel, so that filling effect is improved; gel filling of stratums with different porosities is realized, so that the coagulation performance is improved, the problem that introduction of large particles is impossible, and retention of small particles is impossible is solved; plugging success rate is increased; wide applications in petroleum and geological drilling process are realized, and the leakage-proof leak-stopping filler is particularly suitable for being applied to fractured hard stratums and sandstone stratums.

The invention relates to a construction technology of a support pile capable of improving corrosion resistance, and belongs to the field of support piles. The support pile comprises a steel reinforcement cage and a concrete mixture poured into the steel reinforcement cage, and the surface of the steel reinforcement cage is coated with corrosion-resistant paint. The corrosion-resistant paint is prepared from the following raw materials in parts by mass: water, ammonium heptamolybdate, 2-amino-5-nitropyridine and benzotriazole. A concrete mixture is prepared from the following raw materials in parts by mass: water, cement, fly ash, fine aggregate, coarse aggregate, sodium methyl silicate and polyphosphate. The construction technology comprises the following steps of material preparation, pile position measurement, hole forming, reinforcement cage hanging and placing, underwater concrete pouring and support pile maintenance. The support pile constructed by the method has excellent corrosion resistance, and the construction process is beneficial for the support pile to form a more compact structure.

The invention relates to the technical field of hydrogen fuel cells, particularly to an integrated hydrogen circulating pump in a fuel cell system. The integrated hydrogen circulating pump comprises ahydrogen circulating pump, wherein a motor driving shaft is arranged in the middle of the hydrogen circulating pump, a spline shaft sleeve is arranged outside the motor driving shaft, a permanent magnet synchronous motor rotor is arranged outside the spline shaft sleeve, a shaft sleeve front section interference fit face is arranged in the middle of the outer portion of the motor driving shaft, aflange face installation screw is arranged on the side, away from the shaft sleeve front section interference fit face, of the outer portion of the motor driving shaft, a bearing is arranged at the position, close to the shaft sleeve front section interference fit face, of the outer portion of the motor driving shaft, an involute internal spline is arranged at the position, close to the flange face installation screw, in the spline shaft sleeve, a rectangular tooth groove is formed in the permanent magnet synchronous motor rotor, a shoulder step is arranged at the position, close to the shaftsleeve front section interference fit face and the middle of the permanent magnet synchronous motor rotor, outside the spline shaft sleeve, a flat square is arranged on the shoulder step. According to the invention, the overall effect is good.

The invention relates to a novel sealing ring structure for a stop valve. The novel sealing ring structure for the stop valve is provided with a valve body, wherein a valve seat is connected with the left side of the valve body, a back sealing ring is arranged between the valve seat and the valve body for sealing, the back end part of the valve body is provided with a regulating wheel, the regulating wheel is arranged at the right end part of the valve core through a threaded pin and screw threads, a connecting sleeve is arranged on the valve seat arranged at the front end part of the valve body, the connecting sleeve is arranged at the right end part of the valve seat through a combining sleeve, and a front sealing ring is arranged between the connecting sleeve and the combining sleeve for sealing.

The invention provides a double-triangle polytetrafluoroethylene sealing O ring, the cross section of the polytetrafluoroethylene sealing O ring is a quadrangle formed by two isosceles triangles witha common bottom edge, the polytetrafluoroethylene material serving as the sealing O ring has the defect that the material is hard, due to the fact that the texture of a quartz window is brittle, if face sealing is used like a silica gel O ring, needed pressure is quite large, the quartz window can be easily crushed by the force, while two contact ends of the O ring are machined into triangles, thesurface contact is changed into the line contact, the pressure intensity is greatly increased under the same pressure, the window can be sealed without need of large force, and the problem that the window is crushed due to too large pressure is solved.

The invention discloses a mining classification device which comprises a machine body and a discharging opening. The machine body comprises a classification wheel. A second labyrinth ring is mounted above the classification wheel. A first labyrinth ring is mounted above the second labyrinth ring. A gas inlet channel is mounted above the first labyrinth ring. The discharging opening is formed above the gas inlet channel. A variable frequency motor is mounted above the discharging opening. A feeding opening is formed in the left side of an inner barrel. A secondary air inlet device is mounted below the inner barrel and comprises a pore plate. A cover plate is mounted on the right side of the pore plate. A locking device is mounted on the right side of the cover plate. According to the mining classification device, the technical problems about classification precision and sealing between the classification wheel and the machine body are solved; the mining classification device is widely applied to fine classification of solid particles; through the arrangement of an anti-blockage device, the effects that high-precision classification sedimentation can be carried out on ore particles in ore pulp, and the discharging opening is not prone to being blocked by the ore particles are achieved; and the mining classification device is worthy of energetic popularization.

The invention belongs to a sealing structure, and particularly relates to a standby sealing structure with a low-pressure automatic sealing function. A hard-to-soft reliable sealing structure is adopted for a flashboard and a valve seat, a closed space is formed between double O-shaped rings and the flashboard, and reserve sealing force is provided for sealing of the rear valve seat and the flashboard. By means of the structure, valve leakage caused by model selection, structure defects or unstable pressure can be made up, and reliable sealing of the valve can be achieved through external pressure under the condition that the valve is low in pressure, sealed through pressure or not easy to seal through large caliber (with a wide sealing face).

The present invention provides a comprehensive dust inhibition system, which is used for inhibiting the dust caused by the working of a material breaking system, and comprises: a before-screening drymist injector arranged on a screening machine, and a biological nano-film ejector arranged at the material inlet of a breaking machine. According to the present invention, by arranging different equipment for inhibiting dust according to the characteristics of the dust during the material breaking, the dust during the whole material breaking can be effectively inhibited.

The invention discloses a water entry type portable oxygen generator which comprises an oxygen generation structure and a battery. The oxygen generation structure comprises an air pump and a non-return water stop device, the non-return water stop device is connected with the air outlet end of the air pump, the water entry type portable oxygen generator further comprises a waterproof shell, a floatswitch and a water blocking filter, and the float switch is electrically connected with the air pump and controls the air pump to work; and the battery is electrically connected with the air pump andsupplies power to the air pump, an oxygen generation structure, the battery and the float switch are installed in the waterproof shell, the waterproof shell is of an integrated structure formed by pouring a sealing material, and the water blocking filter is located outside the waterproof shell and communicated with an air inlet of the air pump. Through the design, the waterproof shell enables theinterior of the water entry type portable oxygen generator to be sealed and not prone to water inflow; the non-return water stop device and the water blocking filter are used for preventing externalwater from entering the water entry type portable oxygen generator through the air inlet and an air outlet; and once the float switch enables the water entry type portable oxygen generator to enter water, the air pump starts to work.

The invention discloses a large-current electromagnetic switch to solve the technical problems that an existing device is inaccurate in sampling, complex in structure and insufficient in sealing performance. The large-current electromagnetic switch comprises a shell, a coil, a contact and a binding post, the binding post is arranged at the top of the shell and comprises an exposed part located outside the shell and an embedded part located in the shell, the coil and the contact are arranged in the shell, the contact corresponds to the embedded part of the binding post, and the coil is used for attracting the contact to enable the contact to be separated from the binding post. The large-current electromagnetic switch further comprises an isolation bin, a control panel and a sensor assembly, the isolation bin is arranged on the side face of the shell, the control panel is arranged in the isolation bin, the sensor assembly is installed in the shell, and a connecting wire of the sensor assembly penetrates through the side face of the shell to be connected to the control panel. The large-current electromagnetic switch has the advantages of being compact in structure, high in sealing performance, accurate in detection data and high in environment adaptability.