5036 results about "Rubber ring" patented technology

A waterproof and shockproof cover for a PAD computer is disclosed. The cover comprises an upper housing, a base housing, a glass, a first rubber ring, a second rubber ring and four shockproof elements. The base housing is corresponding to the upper housing, wherein the upper housing comprises a first connection and the base housing comprises a second connection corresponding to the first connection for fastening with each other. The upper housing comprises a viewing window hole and a first groove formed around the rim of the viewing hole, and the first rubber ring is disposed within the first groove. The glass covers the viewing window hole and the first rubber ring. The four shockproof elements disposed respectively at four corners of a rectangular accommodation space of the base housing for bearing the PAD computer.

The invention discloses an apparatus and a method for determining high temperature wettability. The apparatus comprises a heater body, a heating portion, an extruding dripping portion, a sample supporting portion and an image acquisition and processing portion. The heater body is comprised of a stainless steel cavity, a furnace lid and a No. 3 fluorine rubber ring bolt connecting together. A shielding layer in the heating portion is arranged in the center of a furnace bottom in the heater body, and a heating member is placed at the center of the shielding layer. The extruding dripping portionis perpendicularly arranged on an upper end of the heater body, and a lower end of a thermocouple in the heating portion, a lower end of the extruding dripping portion and an upper end of a sample bench are placed in the heater body. A substrate is placed at top of the sample bench. Two sets of CCD digital cameras or CMOS high speed cameras in the image acquisition and processing portion and a light source are respectively placed at the front and rear and the left and right of the heater body, and are in a same horizontal line with a symmetric axis of a quartz glass observation window, a wallthrough hole on the shielding layer and a heating member through hole on the heating member. The invention also provides a method for determining high temperature wettability.

The invention discloses a side-turning resistant elastic wheel and belongs to a wheel structure. The wheel comprises a wheel hub (7), a wheel rubber ring and spoke rods (4), wherein grooves (6) are distributed on the outer side of the wheel hub (7), T-shaped sliding grooves (9) are distributed on the inner side of the wheel rubber ring, a T-shaped sliding block (8) is installed at one end, close to the wheel hub (7), inside each T-shaped sliding groove (9), a reset spring (10) is installed between one end, away from the wheel hub (7), of each T-shaped sliding grove (9) and each T-shaped sliding block (8), one end of each spoke rod (4) is transversely hinged to each groove (6), the other end of each spoke rod (4) is transversely hinged to each T-shaped sliding block (8), and a connecting rod can rotate in a plane perpendicular to a wheel plane about a hinge point and can not rotate in a tangent direction of the wheel. The side-turning resistant elastic wheel is simple in structure, low in cost, few in phenomenon of slow moving of the wheel when driving and braking are conducted and capable of delaying a side-turning tendency when a vehicle makes a turn and transverse force or transverse acceleration is imposed on the wheel, and has a certain side-turning resistant effect.

A shield connector (10) is mounted in a metal case (C) that contains a device to be mounted in a vehicle. The shield connector (10) has a housing (30) in which terminal fittings (20) connected to ends of wires (W) are accommodated and from which the wires (W) are pulled out. Rubber plugs (70) are provided for sealing between the inner peripheries of cavities (31) in the housing (30) and the outer peripheries of the wires (W). A shield shell (50) covers the housing (30) and is connected electrically to the case (C) and also to a shield conductor (60) through which the wires (W) are inserted. A second rubber ring is provided between the housing (30) and the shield shell (50).

An operative hinge for use with an opening/closing body is provided which comprises a hinge case to be installed to a toilet bowl body for operating the opening/closing body; a shaft provided rotatably within the hinge case to support the opening/closing body; a stationary cam fixed within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated; a cam provided within the hinge case and having formed therein a central through-hole through which the rotating shaft is axially penetrated to be slidable on, and rotatable with, the rotating shaft; and a resilient means for urging the rotatable sliding cam toward the stationary can, the hinge further comprising, to further positively control the rotation or the rotating means, a damping means consisting of a rubber ring fitted on the rotating shaft and interposed between the outer surface of the rotating shaft and the inner wall of the hinge case; and a viscous oil applied between the outer surface of the rubber ring and inner wall of the hinge case; the rubber ring having spiral recesses formed on the outer surface thereof.

The invention relates to a shaft sealing device with magnetic fluids, which is characterized in that based on an existing shaft sealing device with magnetic fluids mainly comprising a rotating shaft, a non-magnetic metal shell, magnetic poles, a permanent magnet, the magnetic fluids and a rubber ring, sealing pole teeth made of soft magnetic materials are additionally arranged in sealing pole tooth grooves of the magnetic poles, a sealing pole tooth ring is sleeved on the rotating shaft, the inner diameter of the sealing pole tooth ring is 0.1-0.6mm larger than the diameter of the rotating shaft, the outer diameter of the sealing pole tooth ring is 0.1-0.3mm smaller than the inner diameter of each tooth groove, the thickness of the sealing pole tooth ring is 0.1-0.3mm smaller than the width of each tooth groove, the magnetic fluids are distributed in an annular sealing gap between the rotating shaft and the sealing pole tooth ring, and each magnetic pole comprises two half annular magnetic poles. The positions of the sealing pole teeth of the device can be changed radially along the rotating shaft to adjust coaxiality of the rotating shaft and the sealing pole teeth, uneven distribution of the annular sealing gap in the circumferential direction of the rotating shaft is decreased, reduction of the pressure bearing capacity of the device and abrasion of the rotating shaft and the sealing pole teeth are avoided, and the requirements of sealing components on machining and mounting precision are lowered.

This invention relates to a variable curvature self-reset protecting three-dimensional shock mount, which belongs to the shock insulation control and vibration control fields. The structure of the mount is: coating the frictional layer on the variable curvature chassis and its surface, the lower connection board and the limiting composition board; setting high elastic rubber ring between the chassis and the limiting composition board; setting the slide block in the center of the chassis and applying middle-connection board on it, wherein the convex axial and center arbor is arranged on the middle-connection board, the convex axial is covered the disk spring superposition, and between the superposition is arranged damping material, outside the superposition is covered with steel ring; between the center arbor is arranged damper, the convex axial and center arbor plunge the upper-connection board and have gap distance to the board. The invention can guard and repress horizontal and vertical earthquake wave at the same time, and eliminate the disadvantage of torsion and P-delta effect to the supperstructure, in addition to limiting protection.

The invention relates to a time domain reflection unsaturated permeameter. The center of a barrel cap (11) is provided with an air outlet (1); the joint of the barrel cap (11) and a barrel wall (8) is sealed by a first rubber ring (2), and the joint of a base (10) and the barrel wall (8) is sealed by a second rubber ring (6); and 5 buried waveguides (3) are arranged at equal intervals in the barrel wall (8), a soil sample in the barrel wall (8) is isolated from the base (10) by porous stones (4), and the positions on the base, corresponding to the porous stones, are respectively provided with a water inlet (7) and a water outlet (5). The invention also provides a method for measuring the unsaturated permeability coefficient of a soil body. The method uses a time domain reflection probe to measure the water content of the soil body in the fixed positions and solves the unsaturated permeability coefficient of the measured medium by making use of the beforehand-measured soil-water characteristic curve of the measured soil body and finally using the instant section method. The invention can be used for measuring the unsaturated permeability coefficient of different soil samples (undisturbed or remolded) and improves the accuracy.

The invention provides transparent-aerogel vacuum glass and a manufacturing method of the vacuum glass. The transparent-aerogel vacuum glass comprises glass panes, desiccating agent aluminum bars and a sealing rubber ring. The desiccating agent aluminum bars are arranged inside the periphery between the two glass panes, the sealing rubber ring is used to seal the outside of each of the desiccating agent aluminum bars, a hollow interlayer is formed between the two glass panes, and then the hollow interlayer is vacuumized. The transparent-aerogel vacuum glass is characterized in that transparent aerogel is placed inside the hollow interlayer. The transparent-aerogel vacuum glass has the advantages that since thermal conductivity coefficient of the aerogel is quite low, by matching of the aerogel and special properties of a piece of vacuum glass, the requirement of energy conservation can be met; and since the aerogel is high in strength, and external pressure bearing capacity is large, whole strength of the transparent-aerogel vacuum glass is greatly enhanced, and the transparent-aerogel vacuum glass is not prone to break.

The invention discloses a commutator segment automatic assembly technology. Through the rotation of a dividing plate, in a core feeding position, a core feeding machine conveys the cores into the dividing plate through a core feeding device to carry out location. In a detection position, a detection device carries out detection on the location conditions of the cores. In a sheet inserting position, a sheetbody feeding machine inserts commutator segments into the cores through a sheeting inserting device. In a rubber ring feeding position, a rubber feeding machine props the rubber rings and sleeves the rubber rings on the outer circles of the cores with the inserted commutator segments through a rubber ring sleeving device. In a blanking position, a finished product clamping device clamps finished products and outputs the finished products. The commutator segment automatic assembly technology achieves complete automation of a whole assemble process of assembling scattered commutator segments into cylinders, and has the advantages of reducing amount of labor used, improving efficiency, guaranteeing quality and reducing cost. Meanwhile, the invention provides a full-automatic commutator segment assembly machine for applying the commutator segment automatic assembly technology.

The aluminum electrolytic capacitor consists of anode aluminum foil, electrolyte paper, cathode aluminum foil, and is produced through winding the electrolyte paper into roll core, soaking the roll core inside electrolyte solution, setting the roll core inside aluminum casing and sealing. The present invention features the electrolyte solution comprising main electrolyte 10-30 wt%, solvent 65-89.95 wt%, and additive 0.05-5 wt%; the main electrolyte of ammonium salt compound and with water content of 15-95 %; the organic solvent of alcohol or ether; and the additive of waterproof compound. The electrolyte paper is made of Manila hemp and soaked with the electrolyte solution. The mouth of the aluminum casing is sealed with rubber ring of rubber mixture. The aluminum electrolytic capacitor has electrolyte solution well adsorbed onto the anode aluminum foil and the cathode aluminum foil, no corrosion to leads, high sealing performance and other advantages.

The invention discloses an active-passive type two-degrees-of freedom ankle joint prosthesis, comprising a carbon fiber energy storage sole, a motor, a speed reducer, a motor fixing supporting seat, a belt pulley transmission device, a carbon fiber pipe, a ball screw, an energy storage springs, joint bearings, energy storage rubber rings and joint supporting seats, wherein the carbon fiber energy storage sole is connected with the carbon fiber pipe through the joint supporting seats; the motor fixing supporting seat is connected with the carbon fiber pipe through an active pin; the motor is fixedly arranged on one end of the motor fixing supporting seat; the ball screw is fixedly arranged on the other end of the motor fixing supporting seat; two ends of the motor fixing supporting seat are connected by the belt pulley transmission device; the energy storage springs areis connected with a ball screw nut; and the energy storage rubber rings are connected with the joint bearings and the joint supporting seats through a shaft. The ankle joint prosthesis provided by the invention not only can completely provide required energy for human gait, but also can adapt to various landforms; in addition, the ankle joint prosthesis can completely imitate movement angles of a human ankle joint on a sagittal plane or a coronal plane; and therefore, the normal walking requirement of an amputation patient can be satisfied better.

The invention relates to a sealing washer of claw spin-cap. Its manufacturing method show as follow: the raw materials are PVC paste resin and its reshaping accessory ingredient. The described reshaping accessory ingredient includes stabilizer ESBO and calcium stearate, paraffin lubricant, titanium dioxide pigment. It grinds the reshaping accessory ingredient to slurry, and then puts the slurry into a high-speed mixer, and then it adds PVC paste resin as main raw material and calcium carbonate as filling material, then it mixes the mixture with high-speed for 15 to 25 minutes and achieves liquid sealant through filtering. It injects the liquid sealant into the medial side of the cap and forms a thin layered liquid sealant with the high-speed rotating of the cap, and the cape is baked at 180 deg.C +- 10 deg.C for 60 to 90 seconds. Its character is that it adds the secondary raw material PVC resin, DINCH plasticizer and LGFLEX EBN plasticizer before mixing.

The invention relates to a method for producing thin monocrystalline silicon polished wafer. The method comprises the following steps: Step 1, monocrystalline silicon is sliced up by adopting wire cutting; Step 2, a slotting double-face grinder which adopts a stainless steel planetary sheet with an internal circle inlaid with a soft rubber ring is adopted to carry out double-surface grinding on the sliced monocrystalline silicon; Step 3, a technique of acid corrosion thinning is adopted, wherein, the removal amount resulted from acid corrosion is 10 micrometers to 60 micrometers; Step 4, a nanometer grinding technique is adopted, wherein, the removal amount resulted from nanometer grinding is 1 micrometer to 25 micrometers; and Step 5, a wax polishing technique is adopted, wherein, the removal amount resulted from wax polishing is 5 micrometers to 30 micrometers. By adopting a new technical route and a new technical procedure for producing new thin monocrystalline silicon polished wafer, the invention effectively improves TTV level, WARP level, TIR level, STIR level and other levels as well as the finished product rate of the thin monocrystalline silicon polished wafer.

The invention relates to a joint surface dynamic characteristic parameter testing device of a rolling guide rail, which can be simplified to a single-degree-of-freedom system. The joint surface dynamic characteristic parameter testing device comprises a base, a mounting bottom plate, a rolling guide rail, a rolling guide rail slider, a bridge plate, a plurality of piezoelectric acceleration sensors, an exciter, an elastic rope, a rubber ring, a frame, an impedance head, a normal pressing bolt, a charge amplifier, a data collector, a power amplifier and a computer. Compared with the prior art,the joint surface dynamic characteristic parameter testing device has the significant advantages of compact structure and clear testing principle, and can simultaneously measure the joint surface dynamic characteristic parameters in the normal and lateral directions of the rolling guide rail. In addition, the device can measure the joint surface dynamic characteristic parameters under different load states by adjusting the pre-tightening force of the normal pressing bolt; the exciting force direction passes through the gravity center of the bridge plate during the measurement; the vibration signals of the bridge plate and the base can be measured at the same time; and the influences of basic vibration signals can be eliminated during the measurement of the system frequency response function. Therefore, the joint surface dynamic characteristic parameter testing device has the advantages of high efficiency, high stability and high accuracy.

The invention discloses a recyclable installation device of a microseism sensor and an installation method. The installation device includes a base, installation rods, an injection pipe, a rubber ring and a double sleeve. During installation, the microseism sensor is placed outside an installation hole. The microseism sensor is connected and fixed with the steel base through the installation rods and the double sleeve. The base is coupled with a rock body through cement mortar. Microseism signals are spread to the microseism sensor by the steel base through the installation rods. During recycling, screws on the double sleeve are screwed outside the installation hole so that the microseism sensor is recycled and the installation rods are rotated and pulled out outside the installation hole for recycling. The recyclable installation device of the microseism sensor and the installation method solve a problem that a microseism sensor is difficult to fix, maintain, protect and retract and are capable of receiving and acquiring vibration signals near any position and at the same time, positioning precision of a microseism source is ensured and the cost of microseism monitoring is saved. The recyclable installation device of the microseism sensor and the installation method are widely applicable to microseism monitoring of projects such as underground workshops, tunnels, slopes and roadways and the like.

The invention discloses an axial seal hoop quick-opening horizontal type deep sea simulation cabin which comprises a front end cover, a barrel body, a rear end cover, a saddle, a circular hoop and a hoop locking mechanism. The front end cover is placed on the saddle and supported by a movable frame. One end of the front end cover stretches out in the axial direction to form an annular step, the annular step is provided with at least two rectangular grooves, and O-shaped rubber rings I are mounted in the rectangular grooves. The annular step stretches into the end of the barrel body, the annular step and the inner wall of the barrel body are sealed through the O-shaped rubber rings I, and the front end cover and the end of the barrel body are connected and locked through the annular hoop and the hoop locking mechanism. A cylindrical boss is arranged at one end of the rear end cover in the axial direction. The cylindrical boss is provided with a rectangular groove in the circumferential direction, the cylindrical boss stretches into the tail end of the barrel body, and the cylindrical boss and the inner wall of the barrel body are sealed through an O-shaped rubber ring II in the rectangular groove. The rear end cover is connected with the tail end of the barrel body through a flange. The barrel body and the front end cover are in an axial seal structural mode, and therefore the sealing reliability of the horizontal type deep sea simulation cabin can be improved obviously.

The invention discloses a rubber idler of a belt conveyor, comprising an idle shaft and an idler steel pipe; a wear-resistant buffer layer with an arc outer surface consisting of more than one rubber rings of waste tires is sleeved on the idler shaft in the manner of interference. The invention also discloses a method for manufacturing the rubber idler of the belt conveyor. A wear-resistant idler, a buffer idler, a comb-shaped idler, a taper aligning idler, a friction aligning idler and a rubber aligning idler made of the rubber rings of waste tire are applied. Under the precondition of guaranteeing the sealing performance of the idler, the idler steel pipe or the shaft is sleeved by the wear-resistant idler, the buffer idler, the comb-shaped idler, the taper aligning idler, the friction aligning idler and the rubber aligning idler made of the rubber rings of waste tire. The idlers have comprehensive functions such as anti-corrosion, anti-tarnishing, abrasion resistance, compact resistance, aging resistance, tear resistance, light weight and large elastic force. In addition, the idlers can protect the belt and largely prolong the service life of the belt.

The invention relates to a civil engineering material volume change test instrument and a test method, in particular to a material volume change test device and test method in civil engineering. According to the test instrument, a sealing rubber ring is arranged in an annular groove, a base is covered with an upper cover, an air intake and exhaust hole is formed in the top end of the upper cover, one end of a probe thermometer is arranged in the upper cover, the other end of the probe thermometer is arranged outside the upper cover, a plastic pipe is arranged on the upper end face of the upper cover and communicated with a cavity, and a graduated glass pipe is communicated with the plastic pipe. The test method comprises the steps that first, a civil engineering material test piece is prepared; second, the volume of the civil engineering test piece before a test is calculated; third, the civil engineering test piece is installed; fourth, liquid is injected into the cavity; fifth, the temperature of the civil engineering test piece is measured in an initial temperature environment; sixth, the temperature of the civil engineering test piece is measured in a measuring temperature environment; seventh, the initial temperature and the measuring temperature of the test piece are measured, and the number of division of the test piece is calibrated; eighth, the volume variation theta Vt of the civil engineering test piece is calculated; ninth, the volume expansion coefficient lambda of the civil engineering test piece is calculated. The civil engineering material volume change test instrument and the test method are used for measuring the volume change situation of the civil engineering material.

The invention relates to an adhesive tape encapsulating structure of an organic light emitting diode (OLED). According to the adhesive tape encapsulating structure of the OLED, adhesive tape encapsulation is carried out on the OLED formed by a front electrode, an organic layer, a back electrode and a protection layer, the front electrode, the organic layer and the back electrode are arranged on the upper face of a substrate, the OLED is sealed through adhesive tape which is arranged on the upper face of the OLED and formed by an adhesive sticker and a flexible film strip capable of preventing water vapor and oxygen from passing through, an air barrier layer formed by multilayer films of multilayer thin films made of different materials is further arranged on the upper face or the lower face of the flexible film strip, a layer of filter film can be further arranged on the lower face of the flexible film strip, a sealing rubber ring is arranged on the periphery of the sealing adhesive tape to cover the adhesive tape and the substrate so that air cannot permeate into the OLED from the periphery, and a thin glass sheet or a thin metal sheet can be further arranged on the upper face of the sealing rubber ring to prevent air from entering from the upper face. According to the adhesive tape encapsulating structure of the OLED, due to the fact that the main encapsulating process is the adhesive tape adhering process, the technological process of the adhesive tape encapsulating structure is much simpler relative to a previous method, the production speed can be improved, production cost is lowered, and the adhesive tape encapsulating structure is especially suitable for large-area and large-batch production.

A diverter spout has a drain pipe, a connecting sleeve, an offset shaft, a resilient element between the drain pipe and the offset shaft, a pole for manual operation, a supporting sleeve and an envelope. At least a leakproof rubber ring is mounted around the offset shaft. Due to interferential friction between the leakproof rings and the connecting sleeve or the supporting sleeve and water pressure, a blocking portion of the offset shaft controls the water to flow only through a spout. In normal state, the resilient element overcomes interferential friction between the leakproof rings and the connecting sleeve or the supporting sleeve and controls the water to flow only through a drain opening of the drainpipe. Therefore, water diverts reliably without leakage.

A mocha coffee maker is composed of a lower pot, a funnel, a rubber ring, a filter and an upper pot. The filter and the rubber ring are assembled to the bottom of the upper pot, which is provided with interior threads, while the top end of the lower pot is provided with exterior threads, such that after placing the funnel on the lower pot, the upper pot will be fastened to the lower pot via threads. The funnel has a basin of an appropriate height. The basin has a hole at the central bottom. An expanded flange is provided at the outer rim of the basin, while a siphon extends from the bottom hole of the basin for releasing steamer. When the upper pot and the lower pot are screwed together, the outer film of the coffee pack/tea bag will be pressed thereby to easy coffee/tea making.

The invention discloses a telescopic and rotating cleaning device. The telescopic and rotating cleaning device comprises a base, a connecting supporting rod, an upper supporting plate, a rotating device, a rotating shaft rod, a guide sliding block, a cylindrical sleeve, a sliding chute, a cleaning rod, a fixed circular table, a circular groove and a rubber ring sleeve. According to the telescopic and rotating cleaning device, the structure principle is simple, a cleaning cup is conveniently mounted through the structure connecting manner that the cleaning rod and the rotating shaft rod are telescopically adjusted up and down, the cleaning cup is fixed through a lower contact antiskid ring gasket, the device is practical and convenient, and a user is comfortable when using the device.

A handle structure of scissors provides ring handle parts being detachably fastened to the elongated stems of the scissors. Each of the ring handle part has a projection seat with a square shaped engaging hole. Each of the elongated stems has an axial hole corresponding to the engaging hole and the respective ring handle part can be fastened to the respective elongated stem with an engaging bolt respectively in company with an O shaped rubber ring, rubber washers and a nut. Hence, the ring handle parts can be rotated to any angular positions with respect to the elongated stems so as to allow the blades of the scissors being disposed at various inclining angles under a condition of keeping the fingers, palm and elbow being in a state of unmoving easily according to human engineering for a hand.

The invention discloses a reduction casting compositing method and device for large iron ingots. The method includes: selecting a core blank, adjusting the temperature of the core blank, pre-descaling the surface of the core blank, reducing the oxide scale on the surface of the core blank, casting and compositing, cooling the composite ingot, and repeatedly casting and compositing the composite ingot. The device used by the method comprises a furnace, a shell, a thermal insulation layer, an inner shell, an exhaust port, a vacuum air extractor, an inert gas inlet, a steel ingot die, a sizing block, the core blank, an iron cap section, an thermal insulation plate, a sprue brick, a connecting bolt, a sealing rubber ring, a reduction gas inlet, a furnace cover, a casting passage, a valve rod, a valve body, a valve plate, an asbestos gasket, a slide gate nozzle and a steel ladle. By the method and device, large and super-large cast steel ingots which cannot be produced by common casting can be produced. The steel ingots produced by the method and device are low in production cost, low in internal segregation, good in internal quality, high in yield, and the like.

The invention discloses press fitting equipment and method for a rubber ring of a torsion damper. The press fitting equipment comprises a working platform, wherein a positioning clamping mechanism used for positioning a wheel hub, an inertia ring and the rubber ring is arranged on the working platform; a hydraulic cylinder is arranged above the positioning clamping mechanism on the working platform; a press fitting mechanism is arranged at the end part, which is corresponding to the positioning clamping mechanism, of the piston rod of the hydraulic cylinder. The press fitting method comprises the following steps: sleeving a positioning mandrel with the wheel hub, placing the inertia ring inside a positioning groove on a positioning base, then mounting a rubber ring positioning seat on the positioning mandrel, pressing the wheel hub tightly, sleeving the rubber ring positioning seat with the rubber ring, enabling the hydraulic cylinder to work so as to drive the press fitting mechanism to press downwards for tightly pressing a guide block and enabling the guide block to be in contact with the inertia ring, enabling the press fitting mechanism to press downwards continuously, tightly pressing the inertia ring by spring receiving force, and tightly pressing the bottom end of a press fitting seat between the guide block and the rubber ring positioning seat to press the rubber ring between the wheel hub and the inertia ring. The production efficiency is high, and the quality of products is stable.

The invention provides an apparatus for testing a three-dimensional stress state inside soil. Six routine soil pressure boxes of the apparatus are respectively arranged at six side surfaces, apart from an upper surface and a lower surface which are parallel to each other, of an octahedral pedestal, gaps between the routine soil pressure boxes and the octahedral pedestal are filled with expansion water seal rubber rings, a soil pressure box data lead is connected with a soil pressure box element measuring reading device, and the gap between the soil pressure box data lead and the octahedral pedestal is filled with a polyurethane foam filler for waterproof sealing. The invention simultaneously provides a test method using the apparatus. The apparatus and method have the following advantages: the apparatus is visual in test, clear in calculation method, reasonable in structure, simple to operate and low in cost, errors caused by a conventional stress calculation mode are improved, if it is assumed that precision of a conventional soil pressure box is rho, the test precision of three kind of main stress through calculation is 1.0 rho, the test precision of three kind of shearing stress is 1.22 rho, and the average test precision is 1.11 rho. Improvement of precision can accurately reflect stress state of the soil and improves emergency capacity of engineering.

The invention discloses an intermediate-jacking-station-free jacking construction device of an ultra-long pipe roof and a method thereof. The device comprises a tunnel portal pressurizing device and a pipe roof steel pipe, wherein the tunnel portal pressurizing device comprises a soil body, a jet-grouting pile and a grouting pipe; the jet-grouting pile and the grouting pipe are arranged outside the soil body; the jet-grouting pile is as a sealed waterproof wall; a steel protection cylinder is arranged in the jet-grouting pile; an outer end of the steel protection cylinder is orderly provided with a sealing rubber ring and a steel plate ring; a blind plate connected with the grouting pipe is arranged outside the steel plate ring. A lubricating grouting hole and a grouting connection and control device are arranged on the steel pipe of the pipe roof to reduce jacking resistance, at the same time, pressure of 0.1-0.5 mPa is formed in a 35 mm gap between a soil hole and peripheries of the pipe so as to resist deformation of a soil cave, and achieve the purpose of controlling settlement of a road face above the soil cave. The device and the method provided by the invention have the advantages that negative factors caused by an intermediate jacking station structure in use are removed on the basis of carrying out the intermediate-jacking-station-free jacking method; the problem that jacking construction of the ultra-long pipe roof is difficult is solved; the jacking force for construction is small; the construction precision is high; and the settlement degree is low.

This invention is related to a waterproof electrical connector which comprises an insulation body, a metal shell, a plurality of terminals, a waterproof rubber, and a waterproof rubber ring. The insulation body includes a rubber core and a tongue blade, the tongue blade extending outward from the rubber core. The metal shell surrounds the insulation body and forms a coupling space, wherein the metal shell is a seamless structure. These terminals are fixed in the rubber core, one end of the terminals is located in the tongue blade, and the other end of the terminals pierces through the side of the rubber core away from the tongue blade.

The waterproof rubber is located at the side of the rubber core away from the tongue blade, and connects the metal shell, the rubber core, and these terminals. And the waterproof rubber ring surrounds the front end of the metal shell. Compared to the prior art, this invention of the waterproof electrical connector not only has the smaller whole volume, but also has the higher strength, is not easy to be deformed, and is more durable.

The invention relates to a water jet driving spray-head with an elevation angle automatic-adjustment function, belonging to key equipment for a water- saving irrigation and sprinkling irrigation system and being suitable for solving the problem that the jet range automatically changes when the spray-head rotates. The water jet driving spray-head comprises a mounting riser, a guide rail disc, a spray-head rotator, a spray-head elbow, an elevation angle adjusting mechanism, a spray pipe, a jet element body and a guide rod, wherein a rail is arranged at the periphery of the guide rail disc, and the guide rail is set according to the change rule of the jet range; the elevation angle adjusting mechanism consists of an internal spherical surface joint, an outer sleeve, an internal spherical surface joint and a rubber ring; and when the spray head works, the spray pipe rotates to drive the guide rod to rotate together, the guide rod extends into one end of the guide rail and travels along the guide rail, the guide rail moves up and down due to periodic vertical change of the guide rail, the spray pipe moves up and down while horizontally rotating so as to drive the internal spherical surface joint to rotate along the radian of the spherical surface in an up-down angle range, and therefore the elevation angle of the spray-head can be automatically adjusted.