47results about How to "Guaranteed long-term work" patented technology

The invention discloses a welded base of a surge protector. The welded base comprises a base body; a mounting groove accommodating a protector module is formed in the base body; a connector is formed in the bottom of the mounting groove; a welding pin is arranged in the connector; the lower end of the welding pin protrudes out of the bottom of the base body; the upper end of the welding pin is connected with a plug pin of the protector module; clamping buckles are also arranged on the mounting groove; clamping blocks matched with the clamping buckles are arranged on the protector module. The welded base is simple and compact in structure, small in occupied area, directly welded onto a PCB via a welding pin, suitable for limited mounting space, free of arrangement of components such as a guide rail mechanism, low in mounting cost, high in assembly efficiency, and good in mounting stability; the condition that the surge protector comes off accidentally is avoided effectively; favorable electric connection is guaranteed; the protector module can work normally for a long time effectively; a stable protection function is provided; the use safety is improved.

The invention relates to a multifunctional ball valve assembly for a thickened oil thermal production well. The multifunctional ball valve comprises an upper connector of which the upper rend can be connected with an oil pipe connector, a push-pull sleeve of which the upper end is fixedly connected with the lower end of the upper connector, two gear racks symmetrically and fixedly arranged at the lower end of the push-pull sleeve and extending in the axial direction, a ball valve sleeve of which the upper end is sleeved by the push-pull sleeve and capable of sliding up and down relative to the push-pull sleeve, a ball valve core rotatably mounted in the cavity of the ball valve sleeve through two symmetrically and fixedly arranged ball valve rods, and two gears mounted outside the ball valve sleeve and fixedly connected with the two ball valve rods respectively, wherein a lower connector in sealed connection with an anchor is further arranged at the lower end of the ball valve sleeve; the gear racks at the lower end of the push-pull sleeve are meshed with the gears all the time. In the lifting or pressing process of the upper connector, the gear racks drive the gears to rotate, the gears drive the ball valve rods fixedly connected with the gears to rotate together, and the ball valve rods drive the ball valve core to rotate, so that the opening and closing of the ball valve assembly is realized. The multifunctional ball valve assembly can be widely applied to production operation of the thickened oil thermal production well.

An annuloplasty implant is disclosed comprising first and second support members having a coiled configuration in which the first and second support members are arranged as a coil, with two free ends,around a central axis, wherein, in said coiled configuration, said two free ends are displaced from each other with a peripheral off-set distance extending in a coil plane, said coil plane being substantially parallel to an annular periphery of said coil and perpendicular to said central axis, wherein the first and second support members and the respective free ends are configured to be arrangedon opposite sides of native heart valve leaflets of a heart valve. A method of implanting an annuloplasty implant at a target site in the heart is also disclosed.

The invention relates to an automatic conveying, overturning and covering device for a cleaning plate. The device comprises a conveyor arranged at the left end of a pressing device, horizontal guide rail frames are arranged on the front side and the rear side of the left end of the conveyor, horizontal sliding rails are fixed to the tops of the guide rail frames, sliding blocks are arranged on the sliding rails on the two sides, the sliding blocks on the front side and the rear side are fixedly connected through connecting bottom plates, driving devices for driving the bottom plates to move left and right are arranged on the bottom plates, supporting frames are fixed to the tops of the connecting bottom plates at the front end and the rear end, lifting turnover suction devices are arranged on the supporting frames, lifting air cylinders are fixed to racks on the front and rear sides of the conveyor on the right sides of the supporting frames, and limiting baffles are fixed to the tops of the lifting air cylinders. Supporting plates capable of clamping a rear color-coated sheet to ascend and then turning over are arranged on the two sides of the conveyor, the color-coated sheet is moved to the position above a front color-coated sheet through the left driving device and the right driving device, the color-coated sheet below a placed stainless steel framework is covered, automatic covering is achieved, manpower is saved, efficiency is improved, and labor intensity is reduced.

The invention discloses a copper-clad aluminum alloy comprehensive ground cable, which includes a centrally located round copper conductor, 5 to 7 trapezoidal copper conductors and 10 to 14 cop-clad aluminum conductors, the 5 to 7 trapezoidal copper conductors are stranded on the outer surface of the round copper conductor to form an intermediate conductive layer, and the outer surface of the non-soldering type copper alloy sheath is provided with a metal passivation layer, the corners at both ends of the long bottom edge of the trapezoidal copper conductor are circular arc corners, and the stranding directions of the trapezoidal copper conductor and the copper-clad aluminum conductor are opposite. The copper, white copper, tin, nickel, beryllium, titanium and composite rare earth are placed in a low-frequency electric furnace, heated to 1100-1200 DEG C, and continuously cast horizontally to form a hollow billet, and the composite rare earth is formed by mixing lanthanum, gadolinium and yttrium according to a weight ratio of 10: 4: 1; the cast hollow billet is extruded into a blank tube. The copper-clad aluminum alloy comprehensive ground cable of the invention improves the plasticity of the metal, greatly improves the elongation coefficient of the metal, is favorable for the strength and hardness of the metal to decrease, improves the plasticity and toughness, is more convenient for the stretching processing of the stretching die, prolongs the service life and the conductivity, and greatly enhances the corrosion resistance.

The invention relates to a novel oilfield water injection system including a volumetric downhole power generation device, which includes a main cavity and a volumetric downhole power generation device, the main cavity is provided with a water injection channel and a generator cavity, and the volumetric downhole power generation device is located In the generator cavity, the upper end of the generator cavity is connected to the water injection channel of the main cavity through an independent channel, and the volumetric downhole power generation device is assembled in such a way that the hollow inner cavity is coaxially arranged with the water injection channel In the generator cavity, the diameter of the channel section corresponding to the volumetric downhole power generation device on the water injection channel has almost no change in the axial direction and the liquid column flowing through the channel section It will not be affected by diameter reduction caused by assembling the volumetric downhole power generation device.

The invention relates to compressed air preparation technology, and aims to provide a general multi-mode intelligent adsorption drying method with low energy consumption for compressed air preparation. The present invention is aimed at the adsorption drying system with double adsorption cylinders or multiple adsorption cylinders running in parallel. The air flow organization of the hot air flow is carried out from the upper part of the regeneration adsorption cylinder downwards to realize the regeneration of the adsorbent; it includes the regeneration stage of compressed air waste heat heating, the pressure release stage, The air blast goes deep into the heating stage and the circulation blowing cooling stage. The advantages of the present invention are: (1) low energy consumption, making full use of compression waste heat and environmental cooling capacity; (2) multi-module design, realizing multi-level dew point control); (3) multi-mode regeneration, ensuring long-term operation of the desiccant; (4) ) has adaptive adjustment capability; (5) digital energy efficiency analysis. The present invention utilizes desiccant optimization control based on real-time monitoring of the humidity of the adsorption cylinder to ensure that the overall adsorption process runs smoothly for a long time, ensures long-term stable operation of the desiccant, and greatly reduces its replacement cost.

The invention aims to provide a passive heat metering device and a heat metering system working by the passive heat metering devices. The heat metering device comprises a temperature difference power supply system, a reflection type ultrasonic flowmeter, a temperature sensor, a communication interface, a ZigBee controller and a liquid crystal display (LCD). By using characteristics of a concentrative heating and cooling system, the passive heat metering device automatically supply power through the temperature difference power supply system; a power supply is not required to be regularly replaced, so that the passive heat metering device is energy-saving and environment-friendly; the heat metering system works by two same passive heat metering devices provided by the invention; the two devices run in a low-power mode; the working modes of a main node and a slave node are regularly changed; under the conditions of heating and cooling, the system selects different metering programs to match different power supply capacities of a power supply system; and the passive heat metering device can be simultaneously suitable for heat metering of the heating and cooling system.