42results about How to "Avoid destructive phenomena" patented technology

The invention relates to a concrete multi-factor durability test device under the common effect of tensile stress and environment, wherein, the lower part of a pull rod (8) is connected with a lower pull plate (13), the upper part of the pull rod (8) penetrates an upper pull plate (7) and a limit plate (4), the upper pull plate (7) is penetrated on the pull rod (8) to be fixed by a lock nut (6), a screw cap (2) presses a stress sensor (3) on the limit plate by a spherical screw rod (1), a spring (5) is sheathed on the spherical screw rod (1) and is positioned between the limit plate and the upper pull plate, an upper stretching chuck (91) and a lower stretching chuck (92) are arranged between the upper pull plate and the lower pull plate (13), the upper stretching chuck (91) is connected with the spherical head part of the spherical screw rod (1), the lower stretching chuck (92) is connected with the spherical head part of a spherical pull rod (12), a dumbbell-shaped concrete sample (10) is positioned between the upper stretching chuck (91) and the lower stretching chuck (92), the dumbbell-shaped concrete sample is held by the stretching chucks, both sides of the dumbbell-shaped concrete sample (10) are provided with constant force holding instruments (11), and the constant force holding instruments are connected with a non-metallic ultrasonic testing instrument (14).

The invention provides a tire pattern based on a bionic non-smooth structure and a high-performance radial car tire. The tire pattern includes 4 longitudinal grooves, the depth of the longitudinal grooves is 8-10 mm, and the width is 6-8 mm. The sidewalls of the longitudinal grooves form an included angle of 5° to 10° with the radial plane of the tire, and the sidewalls have streamlined pattern grooves whose cross-section is continuously arranged along the tire circumferential direction. The arc length in the axial direction of the tire is 6° / 360°×L, where L is the circumference of the tire outer ring, and the height of the streamlined pattern groove is 20 to 30% of the depth of the longitudinal groove, and the streamlined pattern groove is the largest The depth is 5-10% of the width of the longitudinal groove. The invention can not only reduce the fluid noise generated in the tire tread longitudinal grooves, but also improve the circulation of road surface water in the longitudinal grooves, and improve the gripping force of the tires by increasing the contact area when the tires are worn. .

The invention provides a hydraulic safety device for a two-roller calender, which is characterized in that the hydraulic safety device comprises a hydraulic cylinder (1), a sensor (2), a hydraulic system (8) and a control system (9), wherein, the hydraulic cylinder (1) is arranged below a roller bearing (10); the sensor (2) is arranged below the hydraulic cylinder (1); the sensor (2), the controlsystem (9), the hydraulic system (8) and the hydraulic cylinder (1) are connected sequentially. The invention has simple structure, and can detect the horizontal pressure change of the roller; when the horizontal pressure exceeds a preset value, a roller automatically enlarges roller spacing through the hydraulic system, avoiding the occurrence of roller damage; when the horizontal pressure dropsto a certain value, the roller automatically resets. The whole process is completed in an instant and the production line process is not affected; on the other hand, piling glue amount can be controlled by horizontal pressure detection.

The invention provides a pavement structure with a comprehensive waterproof reinforced roadbed as well as a construction method of the pavement structure. The pavement structure comprises a roadbed, wherein the roadbed is fully covered with a roadbed waterproof reinforced layer in a sealing manner. The pavement structure disclosed by the invention blocks water exchange between a roadbed force-bearing layer and the outside while improving bearing force and stability of the roadbed, and not only can prevent bearing force and stability from being influenced by surface water, roadbed side-slope seeped water and underground water which enter the roadbed force-bearing layer and the inside of the pavement structure so as to effectively solve water damages, but also can ensure moisture content control of a roadbed material, so that the roadbed can normally work under optimal moisture content in construction control for long time, thereby avoiding bearing force and stability deterioration as well as severe differential settlement caused by moisture content evaporation loss and non-homogeneous migration of the roadbed; the roadbed moisture content is stably controlled, and roadbed buildings in areas with swelling soil having strong water sensibility, collapsible soil and the like can use local materials sufficiently, so that excavation spoil, filling and borrowing materials and transfer are avoided, thereby not only reducing project cost, but also saving energy and protecting environment.

A device for improving the stability of floating water seal and negative pressure sinking of a cylindrical foundation, which is used for auxiliary construction of offshore wind power infrastructure, including a cylindrical foundation, a roof anchor block, an anchor rope, a plumb weight, and a water seepage barrier The central part of the cylindrical foundation is a circular silo body, and a number of sub-silo boards are radially distributed around the periphery to form a trapezoidal silo body. The top cover anchoring block is located on the lower side of the top cover of the cylindrical foundation. The lower part is connected with an anchor rope, and the lower end of the anchor rope is connected Plumb weight, with a water seepage barrier attached to the plumb weight. The invention effectively enhances the water resistance of the cylindrical foundation under the swaying of wind and waves, forces the gas in the cylindrical foundation to be unable to exchange with the external water rapidly when the cylindrical foundation is swayed, ensures the air tightness during the floating process of the cylindrical foundation, and enhances the floatation. The stability of the water seal ensures the safety performance of the cylindrical foundation during the floating process; in addition, the device has a simple structure, is very convenient to design, manufacture and install, and has low cost and strong practicability.

An electric heating exhaust gas treatment device with a double-layer casing structure is arranged in the exhaust system of an internal combustion engine, and includes an inner layer casing, an outer layer casing and a metal catalyst carrier. The inner layer casing is provided with a metal catalyst carrier, and at least one The heating honeycomb element is located in the inner sleeve and arranged above the metal catalyst carrier. There is an insulating gap between the heating honeycomb element and the metal catalyst carrier. The upper end of the inner sleeve is located on the inner side of the outer sleeve and a The annular U-shaped processing groove separates the upper end of the inner casing into a circular arc, one end of the heating honeycomb element is electrically connected to the circular arc, and a conductive element is electrically connected to the circular arc after penetrating through the outer sleeve. The outer wall of the arc ring; thus, the present invention can effectively reduce or avoid the adverse effects of accelerated oxidation and corrosion in the contact area between the end of the electric conductor and the honeycomb core body, and especially avoid the high torque generated during the actual assembly process so that Damage caused by electrically sensitive parts.

The invention discloses a wood frame shear wall which comprises a wood frame column, a wood frame beam, a wood-base structural slab, a top beam plate, a bottom beam plate, studs and a gypsum board, wherein the wood-base structural slab is arranged in the middle of the wall; the plurality of studs are respectively arranged between the top beam plate and the bottom beam plate, thus forming stud frames; the stud frames are symmetrically arranged at the two sides of the wood-base structural slab; the peripheries of the stud frames are connected with the wood frame beam and the wood frame column through bolts; and the gypsum board is arranged at the outer sides of the stud frames, and the edge of the gypsum board is parallel and level to the outer sides of the stud frames. According to the wood frame shear wall, a shingle and the studs are integrated into a whole. The wood frame shear wall is large in lateral rigidity resistance and good in ductility, has high lateral resistance and energy-dissipating capacity, can favorably make breakthrough in height and span of a timber architecture. The wood frame shear wall is wide in application prospect, can be applied to multi-floor and medium and high-rise wood frame structure buildings, and remarkably improves the lateral resistance of the whole structure.

The invention discloses straightening equipment for green brick walls, which comprises slide rails, slide rail pulleys, limit rings, bases, base pulleys, base hydraulic cylinders, intermediate support plates, motors, motor gears, intermediate rotating gears, rotating gears, and rotating bearings , rotating support plate, rotating support plate hydraulic cylinder, support plate, bearing support, bearing seat, bearing, first hydraulic push rod and push plate, the wall righting equipment can be effectively adjusted through the hydraulic cylinder, rotating support plate and push plate It is necessary to repair this kind of wall protrusion, and then carry out the overall wall righting. The invention also provides a construction method for the righting equipment of the blue brick wall, through the rotation of the rotating support plate, the lifting and lowering of the hydraulic cylinder, the rotation of the push plate to adjust the contact angle with the raised wall, keep it parallel to the wall, and pass By gradually adjusting the angle of the limit rod, the angle of each straightening process can be adjusted, so as to realize a gradual and adjustable wall righting process.

A high-pressure, large-flow, low-temperature, liquid nitrogen / helium heat exchange device. The invention relates to a liquid nitrogen / helium heat exchange device, which comprises a casing and a core placed in the casing. The heat exchanger core is installed in the heat exchanger casing, and the casing is filled with liquid nitrogen. Helium enters the core of the heat exchanger from the two helium inlet pipes in two routes, then enters the gas collection chamber welded on the tube sheet, and then passes through the heat exchange tubes at the rear of the upper part in turn, and connects to the heat exchanger at the front of the upper part. After the heat pipe, the heat exchange tube in the front of the lower half of the connecting pipe, the connecting pipe, and the heat exchange tube in the rear of the lower half, lead out from the helium outlet pipe respectively. The heat exchange tubes are welded between the tube sheets on both sides and supported by the supporting plates. The invention adopts the secondary cooling technology, which can obtain larger temperature drop and lower outlet temperature than the existing low-temperature heat exchanger. The structure design of the gas collection chamber breaks through the shortcoming of low pressure of the existing heat exchanger, and the design technology of the combination of expansion and welding breaks through the problem of easy leakage of helium under high pressure.

The present invention relates to a supporting and protecting structure for an underground laneway in hanging and assembling way. the supporting and protecting structure is characterized in that a plurality of supporting and protecting plates are assembled into a supporting and protecting layer; each supporting and protecting plate is hung over the wall rock by a roof bolt; a flexible gap is kept between two adjacent plates; the width of the flexible gap is determined by the size of the laneway; the bigger the laneway deforms, the wider the flexible gap is; a flexible sealing strip is pressed into the flexible gap; the present invention has the beneficial effects that every supporting and protecting plate is hung by the roof bolt, which takes fully advantages of the supporting and protecting of the roof bolt that the wall rock is fixed together by the roof bolt and the supporting and protecting plates are hung over the wall rock by the roof bolt, thereby playing in a hanging role; the plate structure is constructed easier than the one-whole structure; the flexible gap is kept between two adjacent plates, and during the deforming of the wall rock, the gaps between the plates are contracted to release a part of the ground pressure, which changes the rigid supporting and protecting into the flexible supporting and protecting, thereby conforming to the modern flexible supporting and protecting principle; due to the release of the ground pressure, the supporting and protecting pressure is reduced, thereby avoiding the damage of the supporting and protecting layer.

The invention discloses an assembled PC component door / window system which comprises a wall body, a mounting hole, a door / window frame and connecting parts, wherein the mounting hole is formed in a base body of a wall body; the door / window frame is arranged at the mounting hole; the door / window frame is fixedly connected with the wall body through the connecting parts; the mounting hole is formed in the wall body; the mounting hole comprises a groove hole; the groove hole is a groove formed in the longitudinal direction of the wall body; one end of the groove is opened; the groove hole is filled with a sealing adhesive. The assembled PC component door / window system is relatively convenient, rapid and flexible in connection mode, the door / window frame is in good matching relationship with an assembled PC component, convenience can be brought to factory production and on-site mounting, and quality control can be facilitated; meanwhile, due to multiple seals, the risk of water leakage can be reduced, cross of construction procedures and specialty procedures can be reduced, and cross pollution of construction can be avoided.