48results about How to "Large runner" patented technology

A hollow fiber membrane module comprising a large number of hollow fiber membranes contained in a cylindrical case, wherein one end of each hollow fiber membrane, which is left open, is fixed to the cylindrical case, while the other ends of the hollow fiber membranes are divided into more than one small bundles, with the ends, contained in separate small bundles, being kept together and plugged.

The invention relates to a zero emission treatment method of high-salinity wastewater. The method comprises a pre-treatment technology of wastewater, a reduction technology of the wastewater and an evaporative crystallization technology of the high-salinity wastewater, wherein the pre-treatment technology is implemented as follows: a flocculation and/or sedimentation chemical agent is added, heavy metal ions, hard ions and organic substances in the high-salinity wastewater are removed from a chemical reactor, and the pH of the wastewater is adjusted until the wastewater is alkaline; the reduction technology is implemented as follows: the pretreated wastewater is subjected to preliminary reduction treatment through a medium-pressure reverse osmosis device and a high-pressure reverse osmosis device to form high-pressure reverse osmosis concentrated water, the high-pressure reverse osmosis concentrated water is subjected to deep concentration treatment through a primary electric drive ionic membrane device and a secondary electric drive ionic membrane device, high-salinity concentrated water is obtained through concentration, and producing water in the reduction process is recovered to a recycling water tank; the evaporative crystallization technology is implemented as follows: salts in the high-salinity concentrated water are recovered under the negative pressure or micro-positive pressure condition through a nitrate evaporative crystallization device and a salt evaporative crystallization device, and sodium sulfate and sodium chloride are formed.

An arrangement and method for producing an air flow within an upholstered seat back or bottom in which a seat insert has a blower mounted in a pouch at the crotch region between the seat back and bottom and has an outlet which directs air flow up through a spacer layer so as to distribute air flow out through a porous seat back cover or beneath a nonporous cover. A solid plastic backing sheet underlies the spacer layer to direct all air flow out from the spacer layer, the plastic sheet also forming the blower pouch. A mesh layer is bonded to the plastic sheet and used to attach the insert to the seat cushion as well as to carry a heating element pattern extending thereover to also enable electrical heating of the seat back or bottom.

An electro-processing apparatus has a contact ring including a seal which is able to compensate for electric field distortions created by a notch (or other irregularity) on the wafer or work piece. The shape of the contact ring at the notch is changed, to reduce current crowding at the notch. The change in shape changes the resistance of the current path between a thief electrode and the wafer edge to increase thief electrode current drawn from the region of the notch. As a result, the wafer is plated with a film having more uniform thickness.

The invention relates to an equant oil pump plunger assembly, comprising an upper oil outlet joint, an equant plunger, a traveling valve ball, a traveling valve seat and a valve seat joint. The upper oil outlet joint is provided with an oil outlet groove; the upper oil outlet joint, the equant plunger and the valve seat joint are sequentially connected together; the traveling valve ball seat is arranged at the upper port of the traveling seat; a valve seat hole and a valve ball chamber are arranged above a screw under the equant plunger; the traveling valve seat is installed in the valve seat hole; the traveling valve ball is arranged in the valve ball chamber; and a shielding cover is installed above the valve ball chamber and fixed in the equant plunger. The valve ball chamber is arranged in the equant plunger, without installing a traveling valve bonnet. The equant plunger has simple structure, high reliability; the oil pump has long service life; and the valve ball chamber has a large flow channel and small flow resistance. When an oil pump with a small diameter is designed as the equant plunger, the flow channel area can not be reduced and is same as that of the common oil pump. Therefore, the equant oil pump plunger assembly has wide application range, good use performance and remarkable economic benefit.

The invention provides a novel framework die-casting die for a steering wheel. The novel framework die-casting die for the steering wheel comprises a fixed die, a fixed die frame, a fixed die core, apositioning hole, a circular rod, a positioning block, a sprue sleeve, a through hole, a movable die core and a front core drawing structure, wherein the positioning hole is formed in the surface of the top part of the fixed die frame; the through hole is formed in the movable die frame; the circular rod is arranged on the fixed die frame and is in fitting connection with the through hole; the movable die core is mounted in the lower end surface of the movable die frame; and the fixed die core is mounted in the upper end surface of the fixed die frame. According to the novel framework die-casting die for the steering wheel, the front core drawing structure and a rear core drawing structure are mounted between the movable die frame and the fixed die frame; the front core drawing structure is mounted at the front end of the movable die frame, and the rear core drawing structure is mounted at the rear end of a lower die frame of the fixed die frame, so that the die can be conveniently smoothly released from the steering plate, and the die adhering problem of a die-casting part can be reduced, and the shift productivity can be effectively improved.

The invention discloses a waste heat recovery system for a thermal power plant. The waste heat recovery system comprises a fixing plate, and a water circulation device, a heat exchange device, a flue gas treatment device A and a flue gas treatment device B are installed at the top end of the fixing plate; a flue gas inlet pipe is fixedly installed on one side of the heat exchange device, and a water inlet pipe and a return pipe are installed on the side of the heat exchange device; and a circulating pump is fixedly installed on one side of the water circulation device, and the water inlet end of the circulating pump communicates with the interior of the circulating pump. According to the waste heat recovery system, the water circulation device is connected with the heat exchange device, heat conduction blocks and partition plates are additionally arranged in the heat exchange device, flowing of flue gas increased, recovery of heat in the flue gas is effectively improved, and the loss of heat in the flue gas is reduced; the flue gas after waste heat recovery is treated through the installed flue gas treatment device A and the flue gas treatment device B; and dust, sulfur-containing compounds and nitrate-containing compounds in the flue gas are effectively removed through filtration, electrostatic rod dust removal and chemical reaction, and harmful substances in the flue gas are reduced.

The invention discloses a direct through glass vacuum pipe which comprises a glass outer pipe, an inner pipe assembly formed through respectively welding two ends of a metal bellows with two sections of glass inner pipe, a stainless steel support clamp and a getter, wherein a selective coating is plated on the outer wall of the inner pipe assembly and is arranged at the inner part of the glass outer pipe, the inner pipe assembly is in vacuum sealing with the glass outer pipe, and the stainless steel support clamp and the getter are assembled between the inner pipe assembly and the glass outer pipe. The direct through glass vacuum pipe is manufactured by adopting the following steps of blanking and washing, welding the glass inner pipe with the bellows, coating a film, assembling the clamp, assembling, exhausting, baking a pin and the like. An air heat collector consisting of the direct through glass vacuum pipe comprises at least one group of heat collector units which are transversely or longitudinally arranged and communicated. According to the invention, the problems of air blockage of the vacuum pipe air heat collector and easy oxidization of a melting port of the metal bellows are solved, and the production quality is improved. Meanwhile, the heat utilization efficiency is increased, the processing difficulty and cost are reduced, and the industrialized production is facilitated.

The invention discloses a flow limiting valve and relates to the technical field of hydraulic pressure. The flow limiting valve comprises an end cover, a plurality of gaskets, flow limiting pieces and a shell. A first through hole is formed in each gasket. Vortex grooves are formed in the two sides of each flow limiting piece, and the vortex grooves in the two sides of each flow limiting piece are communicated. The gaskets are arranged on the two sides of the flow limiting piece, and the vortex grooves are communicated with the first through holes. The shell is provided with a containing cavity. The gaskets and the flow limiting pieces are placed in the containing cavity. The shell is sleeved with the end cover, and the end cover is fixedly connected with the shell and tightly presses the gaskets and the flow limiting pieces in the axial direction. The flow limiting valve has the advantages that the vortex grooves are formed in the flow limiting pieces, liquid passes through the vortex grooves to form vortexes, the flow speed of the liquid is decreased, multiple flow limiting pieces can be arranged according to the flow control requirements, and the effective control over the extremely small flow is achieved.

The invention relates to the technical field of petroleum natural gas drilling tools, in particular to an underground while-drilling bidirectional eccentric nipple reaming drilling tool. The underground while-drilling bidirectional eccentric nipple reaming drilling tool structurally comprises a body, wherein a water hole is arranged in the center of the body; one end of the body is provided with afemale buckle connected with an upper drill string, and the other end of the body is provided with a male buckle connected with a lower drill string; two groups of eccentric reamers are arranged outside the body; each group of reamers comprises four blades; and PDC cutting teeth are arranged on each blade in a brazing manner. By adopting the underground while-drilling bidirectional eccentric nipple reaming drilling tool, the problems of drill pipe sticking by cuttings bed, drill pipe sticking by borehole necking as well as difficulty in loading a casing pipe at soft formations or easy-to-collapse formations and the like can be solved.

The invention discloses a fan comprising a casing. One end face of the casing is provided with a motor, and the other end face of the casing is provided with an air inlet which is internally providedwith an air inlet tube; the peripheral surface of the casing is provided with an air outlet, and the casing is internally provided with an impeller; the impeller comprises a baseplate, blades and a front disk, and an air outlet cavity is formed between the baseplate and the front disk; the air inlet communicates with the air outlet, and the blades are arc-shaped, and the arc centers of the bladesare in the baseplate; the proximal ends of the blades are inlet angles, and the distal ends of the blades are outlet angles; and a line connecting the outlet angles and the circle center of the baseplate is a distal radius. According to the fan, the optimal structural design of the blades on the fan is provided, and the air outlet efficiency of the fan is improved by adopting the air inlet tube and the front disk; and the overall power consumption is reduced, and the operation is more steady and smoother.

The invention relates to the technical field of rotational flow energy dissipation structures in the technical field of vertical shaft drop energy dissipation structures, and particularly relates to a multistage rectification slideway vertical shaft rotational flow flood discharge tunnel. The multistage rectification slideway vertical shaft rotational flow flood discharge tunnel comprises a straight inlet section, a straight outlet section and a vertical flow channel, wherein the upper end of the vertical flow channel is connected with the straight inlet section, and the lower end of the vertical flow channel is connected with the straight outlet section; a plurality of sets of spiral slideways enabling water flow in the vertical flow channel to flow downwards in a winding mode in the tangential direction of the inner wall of the flow channel are arranged in the vertical flow channel and are arranged at intervals in the vertical direction; and an overflow structure is arranged in the straight outlet section and suspended in the center of the flow channel of the straight outlet section to divide the flow channel of the straight outlet section into a fluid circulation flow channel above the overflow structure and a fluid sand washing flow channel below the overflow structure. The flood discharge tunnel is simple in structure, the flow speed of fluid can be greatly decreased through the arranged multistage spiral slideways, a good energy dissipation effect is achieved on the fluid, and the problems of sand and stone accumulation and overflow water recession can be effectively solved through the arranged overflow structure.

The invention provides a built-in oil well pump plunger for upward-traveling valves. An upper oil-outlet joint is in threaded connection with the upper part of an equal-diameter plunger; a traveling valve ball seat is on an upper port of a traveling valve seat; a valve ball cavity and a valve seat hole are arranged under a thread of the upper part of the equal-diameter plunger; the traveling valve seat is fixedly arranged in the valve seat hole; a traveling valve ball is positioned in the valve ball cavity; and the lower part of the upper oil-outlet joint is provided with a block cover. The traveling valve seat and the valve seat hole in the equal-diameter plunger are in interference fit which plays a role in sealing and fixing, or the traveling valve seat and the equal-diameter plunger are connected and fixed through threads, and the lower end face of the traveling valve seat is a sealing surface. As the valve ball cavity is arranged in the equal-diameter plunger, no traveling valve cover needs to be installed; the plunger is simple in structure and high in reliability, and ensures long lifespan of oil well pumps, large flow channel of the valve ball cavity and low flow resistance; and when a small-diameter oil well pump is designed as an equal-diameter oil well pump, the area of the flow channel cannot be reduced while the flow channel of the equal-diameter oil well pump is the same with that of common oil well pump. Therefore, the plunger has the advantages of wide application range, good use performance and significant economic benefit.

An alkali liquid multi-stage recovery process is disclosed, belonging to the technical field of viscose fiber production, papermaking, and the like. The process includes first-stage dilution, first-stage filtration, second-stage dilution, first-stage temperature rising, second-stage filtration, second-stage temperature rising, third-stage filtration, third-stage dilution and fourth-stage filtration. Different devices are adopted by combination of process characteristics, namely different nanofiltration systems are adopted in different process stages so that the process adapts to alkali liquidrecovery better. Multi-stage dilution and temperature rising and other types of treatment are adopted to reduce the viscosity of fed liquid, increase the net liquid flux, and reduce differential pressure among films, thus ensuring controllable, stable and efficient alkali liquid recovery.

The invention provides a sand preventing oil well pump which is composed of a plunger assembly and a pump cylinder assembly. A pull rod is connected with a short plunger. The short plunger is matchedwith a long pump cylinder in the pump cylinder assembly in a sliding and sealing manner. A sand storing ring-shaped groove is formed in the outer surface of the short plunger. A sand settling cylinderin the pump cylinder assembly is arranged on the outer wall of the short pump cylinder in a sleeving manner and forms a sand settling ring. An elastic limiting claw is arranged in the sand settling cylinder. The pump has the characteristics that the pumping efficiency is high, the sand preventing effect is good, the bearing ability is high, forward and reverse well washing and sand flushing of immovable pipe columns are achieved, and the oil well pump is applicable to exploitation of sand producing heavy oil wells.

The invention provides a split type blast furnace slag flushing water heat exchange device and method. The split type blast furnace slag flushing water heat exchange device comprises an upper box cover, an upper box body, a lower box cover, a lower box body, heat exchange pipe bundles and communicating pipes. The upper box cover is fixed to the top of the upper box body to form an upper heat exchange box, the lower box cover is fixed to the top of the lower box body to form a lower heat exchange box, the upper heat exchange box is connected to the upper portion of the lower heat exchange box, the heat exchange pipe bundles are arranged in the upper heat exchange box and the lower heat exchange box, two ports of each heat exchange pipe bundle communicate with a water outlet main pipe and a water inlet main pipe correspondingly, the water inlet main pipe and the water outlet main pipe of each single heat exchange box are not overlapped, the water outlet main pipes and the water inlet main pipes of the different heat exchange boxes are connected through the communicating pipes to achieve parallel connection or series connection switching of the upper heat exchange box and the lower heat exchange box, or independent heat exchange between the upper heat exchange box and the lower heat exchange box is achieved by disconnecting the communicating pipes. The split type blast furnace slag flushing water heat exchange device and method solve the problems that a sewage heat exchange device is prone to corrosion, blockage and scaling, and the heat exchange efficiency is high.