39results about How to "With elastic deformation" patented technology

The invention discloses a self-lubricating crankshaft which comprises a major semi-axis, an eccentric circle and a minor semi-axis. The center of the crankshaft is provided with an axial through hole; the top and the bottom of the eccentric circle are respectively provided with a first radial oil guide hole and a second rail oil guide hole which are communicated with the through hole; the outer surface of the minor semi-axis is provided with at least one spiral oil guide slot which is slantingly formed along the axial direction and is communicated with the through hole; the rotating direction of the spiral oil guide slot is opposite to that of the crankshaft; the outer surface of the minor semi-axis is also provided with a spiral communication groove extending towards the bottom of the eccentric circle from the top end of the spiral oil guide slot; the spiral communication groove does not run through the lower end face of the minor semi-axis; the spiral oil guide slot is spirally formed by using the center line of the crankshaft as the center; a helix angle alpha of the spiral oil guide slot has an angle range of 5 degrees to 85 degrees; a concave included angle beta of two opposite lateral surfaces of the spiral oil guide slot in the process of ascending along the spiral direction has an angle range of 2 degrees to 80 degrees; and the rotating direction of the spiral communication groove is the same with that of the spiral oil guide slot. The invention also discloses a rotary compressor, an air conditioner and a heat-pump water heater which use the self-lubricating crankshaft.

The invention discloses a full-metal soluble bridge plug. The full-metal soluble bridge plug comprises a seat sealing cylinder (1), an upper cone body (2) and a sealing cylinder (3), a lower cone body(4), a lower joint (5), a release rod (7), a conversion joint (8) and a seat sealing rod (9), the lower end of the seat sealing cylinder (1) is attached to the upper end surface of the upper cone body (2), the upper end of the seat sealing cylinder (1) is connected with an externally-arranged seat sealing tool, in the seat sealing barrel (1), the upper end of the conversion joint (8) is connectedwith the lower end of the seat sealing rod (9), the lower end of the conversion joint (8) is connected with the upper end of the releasing rod (7), the lower joint (5) is connected with the releasing rod (7) through threads, the lower joint (5) is connected with the lower cone body (4) through threads, one end of the lower cone body (4) is matched with one end of the sealing cylinder (3) throughthorn teeth, and the other end of the sealing cylinder (3) is matched with the upper cone body (2) through the thorn teeth. The full-metal soluble bridge plug has the characteristics of reliable anchoring, reliable pressure bearing, complete dissolution and the like.

The invention relates to the field of concrete manufacturing, in particular to an aggregate screening device for self-compacting concrete. The aggregate screening device comprises two fixed brackets, a rotating shaft fixed to the two brackets, a spiral spring barrel mounted on the rotating shaft and a driving part for driving the rotating shaft; the spiral spring cylinder comprises a spiral body framework, a feeding end plate and a discharging end plate, wherein the feeding end plate and the discharging end plate are installed at the two sides of the spiral body framework; through holes for mounting the rotating shaft are formed in the feeding end plate and the discharging end plate; and an external thread is arranged on the part, allowing the discharging end plate to slide, of the rotating shaft, at least one distance adjusting nut used for fixing the discharging end plate is further correspondingly arranged on the rotating shaft, and the distance adjusting nut can compress the spiral body framework by adjusting the position of the discharging end plate, so that the screw pitch of the spiral body framework is adjusted. According to the aggregate screening device, by changing the screw pitch of the spiral body framework, screening of flaky aggregates with different thicknesses is achieved, and the efficiency of screening out the flaky aggregates can be remarkably improved.

The invention relates to the technical field of air conditioners, and in particular relates to a preparation method of a wear-resistant coating of a screw compressor and the screw compressor. The preparation method comprises the steps that S1 a meshing clearance is kept between a female rotor and a male rotor; oil on the rotor surface of the female rotor and/or the male rotor is removed, and the rotor surface is blow-dried; S2 the surface of the rotor is subjected to sand blasting, and sand grains on the surface of the rotor are cleaned; S3 a PEEK coating is sprayed on a to-be-sprayed area on the surface of the rotor; and S4 the rotor sprayed in the step S3 is subjected to sintering treatment, specifically, the temperature of the rotor is increased to 380 to 420 DEG C from the room temperature within 20 to 25 min, heat preservation is conducted for 0.5 to 1.5 h at the temperature of 380 to 420 DEG C, the rotor is cooled to the room temperature, the PEEK coating is formed, and the thickness of the PEEK coating is controlled. According to the preparation method, the PEEK coating with the uniform thickness can be prepared on the surface of the rotor, and the PEEK coating has the advantages of being low in friction coefficient, resistant to abrasion, self-lubricating, good in adhesive strength and good in sound absorption effect.

The invention relates to the field of concrete, and provides bare concrete. The invention aims to solve the problem that bare concrete is corroded easily by wind and rain. The bare concrete comprisesthe following components: in parts by mass, 16-18 parts of water, 15-20 parts of Portland cement, 6-8 parts of limestone powder, 100-105 parts of stone, 80-85 parts of sand, 3-5 parts of hollow glassmicrobeads, 1-2 parts of ethylene-vinyl acetate copolymer, 0.5-1 part of a silane impregnating agent and 0.1-0.5 part of Vaseline. Through addition of the hollow glass microbeads of tiny spheres, filling of pores formed by cement particles is facilitated, so that the impervious performance of the bare concrete is enhanced, rainwater does not penetrate into the bare concrete easily, and the servicelife of the bare concrete is prolonged.

The invention relates to the technical field of oil and gas drilling, well completion, well cementation or well logging, in particular to an external casing packer. The external casing packer comprises a center pipe, a rubber sleeve and a rubber sleeve fixing ring, the rubber sleeve is arranged outside the center pipe in a sleeving mode, the rubber sleeve fixing ring is fixed to the center pipe and fixedly connected with the two ends of the rubber sleeve, and an annular space is reserved between the rubber sleeve and the center pipe. The rubber sleeve comprises an inner sleeve made of an elastic material which does not expand when encountering liquid and an outer sleeve made of an elastic material which expands when encountering oil, a first flow channel leading to the annular space is formed in the rubber sleeve fixing ring, and a sealing valve element is arranged at an inlet of the first flow channel; and the inner sleeve comprises an inner sleeve body, a radial through hole is formed in the axial center of the inner sleeve body, a fracturing sealing film is arranged at the end, facing the center pipe, of the through hole, and a finger-shaped reed is arranged at the joint of therubber sleeve and the rubber sleeve fixing ring in a surrounding mode. The external casing packer can prevent the rubber sleeve from bursting, tearing and extruding, and the packing effect is improved.

The invention relates to the technical field of brake system emptying, and discloses a vehicle brake system emptying device and method. The emptying device comprises a shell, vacuum pumps, a brake fluid recovery unit, a first connecting pipe and a second connecting pipe, wherein the vacuum pumps, the brake fluid recovery unit, the first connecting pipe and the second connecting pipe are arranged on the shell; the vacuum pumps are connected with the brake fluid recovery unit through the first connecting pipe; one end of the second connecting pipe is connected with the brake fluid recovery unit, and the other end of the second connecting pipe is provided with a connector used for being connected with an exhaust port of a brake system; the second connecting pipe is provided with a transparent observation section. In the brake system emptying process, negative pressure is provided by the vacuum pumps and used for pumping brake fluid carrying air, whether the emptying process is over or not is determined by observing whether air exists in the brake fluid in the corresponding connecting pipe, an air pressure source is not needed in the whole emptying process, and use of the emptying device is not limited by working areas. In addition, the connector is a flexible connector and suitable for exhaust ports, in different sizes, of vehicle brake systems.

The invention provides a composite soluble bridge plug, and relates to the technical field of oil field downhole tools. The lower end of a setting cylinder is attached to the upper end face of an upper cone, the lower end of a setting rod is in threaded connection with a releasing rod, and the releasing rod is connected with a lower cone through a shear pin; and the upper cone, the lower cone and a fracturing ball are all of hollow structures, and the wall thickness of the hollow outer portions is approximately equal to that of a sealing cylinder. The composite soluble bridge plug has the advantages that the upper cone, the sealing cylinder, the lower cone and the fracturing ball are all made of magnesium-based alloy materials, the wall thicknesses of the hollow structures are the same, the dissolution rate and the dissolution time under the same environment condition are the same, and complete dissolution can be achieved in the later period; and an alloy coating is sprayed to the outer portion of the sealing cylinder, the outer surface of the sealing cylinder and the inner wall of a casing pipe are reliably anchored, sealing is achieved through a sealing ring, the fracturing ball seals the upper pressure, the lower cone of a blind plugging structure seals the pressure of the lower stratum, bidirectional sealing is achieved, and meanwhile fine particles are formed after dissolution and discharged along with flowback fluid.

The invention discloses a water-drive photothermal impermeable building exterior wall, and belongs to the field of construction technology. Through the form of evenly arranging water-drive photothermal balls on the outer surface of the exterior wall and water phototatic composite tubes which are embedded in the exterior wall during construction and connected to the water-drive photothermal balls,once rainwater penetration occurs to the exterior wall, the water-drive composite tubes can absorb permeating water from the exterior wall and then transfer the permeating water to the water-drive photothermal balls to trigger the photo-thermal conversion action, through the water shrinkage feature of rear water shrinkage pull rods, reflective flaps on the surfaces of the water-drive photothermalballs are pulled to deform and fit along photothermal ball grooves, internal photothermal conversion layers are unfolded, the photothermal conversion layers are matched with the reflective flaps to absorb light and convert light into heat energy, and heat is also transmitted to the depths of the exterior wall through the water-drive composite tubes for heating and evaporating the permeating water,then water vapor flows from the water-drive composite tubes to the photothermal ball grooves and dissipates to the outside, thus, the water penetration problem of the exterior wall can be effectivelysolved, and the service life of the exterior wall is prolonged.

The invention relates to an integrated short connector of an instrument while drilling. The integrated short connector comprises a telescopic connector assembly, a fixed connector assembly and a drillcollar adapter substitute, wherein the drill collar adapter substitute comprises an upper drill collar adapter substitute and a lower drill collar adapter substitute; the telescopic connector assembly is mounted in the upper drill collar adapter substitute, and the fixed connector assembly is mounted in the lower drill collar adapter substitute; and the telescopic connector assembly is in butt joint with the fixed connector assembly. The connector is integrated with drill collar nipples of all instruments of a rotary geosteering system, and power supply communication in the instruments is achieved while threaded connection of the drill collars of all the instruments is achieved. In the manner of achieving internal communication in the instruments through direct connection of the drill collars, on one hand, the link of manual connection of a field operation is omitted, so that the construction safety risk is reduced, and the operation efficiency is improved; and besides, the threaded connection torque of the drill collars is utilized to ensure the reliability of internal connection power supply communication of the instruments, so that the use and assembly difficulty of the connector is reduced, the overall structure of the connector is simplified, and the length of the connector is shortened.

The invention discloses a flexible wind shield, and belongs to the technical field of heavy-duty car part manufacturing. A supporting steel plate and the flexible rubber are compounded into a whole, the flexible rubber in contact with the cab floor is matched with the cab floor in shape, gaps of the cab floor are shielded, and air leakage is reduced; the supporting steel plate in contact with thecooling module is provided with a plurality of through holes or notches for various pipelines and other structures to penetrate through according to the structure of the cooling module, so that the gap between the flexible wind deflector and the cooling module is greatly reduced, the hot air backflow prevention effect is good, and the heat dissipation efficiency of the cooling module is improved.Peak-shaped protrusions on the supporting steel plate increase the combination area of the supporting steel plate and the flexible rubber, and the combination strength is improved. The wrinkled protrusions and the annular grooves are formed in the flexible rubber, before the cab does not bounce, the upper portion of the flexible rubber and the floor of the cab are sealed, hot air backflow is prevented, and after the cab bounces, the flexible rubber and the cab can still be well sealed through compression and springback deformation.

The invention discloses a valve needle guide sleeve which comprises a sleeve and a fixing seat, wherein a valve needle matching hole is formed in the sleeve; the fixing seat is arranged at the rear end of the sleeve; a hoisting screw hole and a plurality of fixing holes are formed in the fixing seat; the valve needle matching hole is communicated with the hoisting screw hole, and axes of the valve needle matching hole and the hoisting screw hole are positioned on the same line. According to the valve needle guide sleeve, the whole valve needle guide sleeve is divided into two parts, namely the sleeve and the fixing seat, the matching requirement of the valve needle matching hole and the valve needle can be met according to length of the sleeve, the wear is reduced, and adhesive impregnation is avoided. Moreover, the wall thickness of the fixing seat is reduced, and a certain yield space is formed between the hoisting screw hole and the valve needle matching hole, so that the whole valve needle guide sleeve has a certain elastic deformation. When the valve needle works to generate micro offset, the valve needle is prevented from being clamped by the guide sleeve.

The invention discloses a fireproof artificial quartz sheet material. The fireproof artificial quartz sheet material is prepared from the followings specific components: 80 percent or more than 80 percent of natural quartz sand, 1 percent to 3 percent of fused silicon dioxide, 5 percent to 10 percent of resin and a curing agent, 2 percent to 5 percent of a mica sheet, 2 percent to 5 percent of antimony trioxide and 3 percent or more than 3 percent of silica. The fireproof artificial quartz sheet material disclosed by the invention has a scientific and reasonable design; the fused silicon dioxide and the antimony trioxide are added into a bonding material so that the flame-retarding effect of the bonding material is greatly improved; the fireproof artificial quartz sheet material utilizingthe bonding material has certain elastic deformation. The mica sheets are added into the fireproof artificial quartz sheet material so that the product has fireproof performance; the surface of the fireproof artificial quartz sheet material has bright color and luster due to the characteristics of the mica sheets and the aesthetic feeling of the fireproof artificial quartz sheet material is increased. The fireproof artificial quartz sheet material is arranged in a layering manner and dense step holes are ingeniously arranged on a bottom layer, so that the heat can be released in a fire disaster or when the fireproof artificial quartz sheet material is heated and the thermal deformation of the silica is provided; the stress can also be released when the fireproof artificial quartz sheet material is partially stressed or heated so that the fireproof artificial quartz sheet material is firmer.

The invention discloses a splash-proof dust-removing device for a molten iron ditch slot. The splash-proof dust-removing device for the molten iron ditch slot is characterized in that the device comprises a molten iron slot and at least one section of splash-proof cover. Each splash-proof cover is provided with an outer cover stretching along the molten iron slot, wherein a whole cross section of the outer cover is of a reversed-U-shape. The lower edges of two sides of each outer cover are connected with an inner edge and an outer edge correspondingly. Two outer edges of the lower edges of two sides of each outer cover are connected with longitudinal edge beams correspondingly. Two longitudinal edge beams are connected therebetween through at least two transverse beams which are of reverse-U-shape roughly and are connected at the outer side of the outer cover. Spanners are connected on the transverse beams. The transverse beam at one side is connected with a pile drill inserted into ground through a hinge. Two ends of the outer cover are connected with end plates which are reverse-U-shaped on the whole correspondingly. Edges and inner edges are arranged in the outer cover, and the edges and the inner edges and the end plates are connected with an inner side metal net. Inward elastic steel wires are connected on the metal net. An air exhaust duct is arranged on the outer cover, wherein the air exhaust duct stretches upward and then stretches toward the inclined upward side away from one side of the hinge. The air exhaust duct is connected with a movably butt joint loop. The movably butt joint loop is connected with a fixed butt joint loop connected with an air intake duct in a butt joint mode. According to the splash-proof dust-removing device for the molten iron ditch slot, a better working environment can be created.

The invention belongs to the technical field of curtain wall structures and discloses a vertical decoration line anti-falling structure which comprises a connecting clamping piece, the connecting clamping piece is installed between a decoration line and a decoration buckle cover, the decoration buckle cover is installed on the outer side of the decoration line, and a first clamping groove is formed in the side, close to the decoration buckle cover, of the decoration line. A second clamping groove is formed in the inner side of the decorative buckle cover, one end of the connecting clamping piece is installed in the first clamping groove in a buckled mode, and the other end of the connecting clamping piece is installed in the second clamping groove in a buckled mode. The connecting mode that the connecting clamping pieces are used in cooperation with the decorative molding and the decorative buckle cover is adopted to replace a traditional connecting mode of tapping screws, the problem that the small decorative buckle cover falls off can be effectively solved, and the safety of the large decorative molding is improved on the premise that the effect of the outer vertical face is guaranteed.

The invention discloses medical forceps for alcohol pads. The forceps comprise a first clamping body, a second clamping body, a rivet, clamping heads, clamping plates, connection plates, connection holes, a fixing plate, a connection groove and an elastic clamp. The first clamping body is hinged to the second clamping body through the rivet, the clamping heads are arranged at the front ends of thefirst clamping body and the second clamping body, and the structures of the clamping heads are curved; the front ends of the clamping heads are of a tip-shaped structure, the clamping heads and the clamping plates are integrally formed, and the included angles between the clamping plates and the clamping heads are 140 degrees; the connection plates are vertically fixed to the tail ends of the clamping plates, the connection holes run through the middles of the connection plates, and the two connection plates overlap; the two connection holes are concentrically matched with each other and connected with the rivet, the fixing plate is vertically fixed to the tail ends of the connection plates, the rectangular connection groove is formed in the tail end of the fixing plate, and the elastic clamp is hinged to the tail end of the first clamping body and the tail end of the second clamping body separately. The medical forceps for the alcohol pads are simple in structure and convenient to use and save labor, and the hand contact part can be prevented from being in contact with alcohol.

The invention discloses a multifunctional silica gel box, and relates to the technical field of tool boxes. The multifunctional silica gel box comprises a box body and a box cover, wherein the outer side of the box cover is connected to the box body through a connecting belt A; a rectangular opening A and a rectangular opening B are separately formed in the tops of two adjacent side walls of the box body; a L-shaped fixing part A matched with the rectangular opening B, and an L-shaped fixing part B matched with the rectangular opening A are separately arranged on two adjacent inner side wallsof the box body; the rectangular opening B is positioned above a joint of the connecting belt A and the box body; a T-shaped fixing part is arranged on the outer side wall of the box body below the rectangular opening A; a plate-shaped fixing part is arranged on the outer side wall of one end of the box body with the L-shaped fixing part B; and a waist-shaped hole matched with the T-shaped fixingpart is formed in the end part of the plate-shaped fixing part. The tool box with the box body, the box cover and supporting plates is integrally formed, and is layered through the supporting plates,so that a space utilization rate of the tool box is increased.