42results about How to "Achieve stress relief" patented technology

The invention relates to an overall process under-balance drilling pressure compensation system and a method for oil and gas drilling, an underground casing valve (10) is connected on a superior casing string, a wellhead rotary blowout preventer (11) is arranged at an upper end of a wellhead blowout preventer group and is connected with an under-balance throttle manifold (8) through a high-pressure hose (9), a well control manifold (12) which is connected out of a normal wellhead control device by four-pass is connected with a drilling fluid continuous pouring system in parallel by two-pass; and drilling is pulled to the front of the underground casing valve (10), the drilling fluid continuous pouring system grouts, the under-balance throttle manifold (8) controls the pressure in a shaft, and the drilling fluid which is circulated out enters a normal drilling fluid circulating system. In the drilling pulling process, the drilling fluid can be continuously poured into the shaft by a ground pressure compensation system and the bottom-hole pressure can be dynamically controlled simultaneously, thus effectively preventing formation fluid from intruding into the shaft in the drilling pulling process and keeping the steady under-balance state of the shaft.

The invention relates to a self-rotating jet drilling device, which comprises a cylindrical shell, wherein the back end of the shell is provided with a tubular connecting part; a rotating part is rotatably arranged in the shell; the outer diameter of the rotating part is corresponding to the inner diameter of the shell; the front end of the rotating part is provided with a cylindrical extending section along the axial direction; the extending section extends out of the front end of the shell and is fixedly connected to a sprayer along the axial direction; the periphery of the rotating part is provided with a plurality of helical grooves; an axial through hole is arranged on the rotating part; blind holes are arranged in the sprayer from back to forth; the blind holes are communicated with the through hole; and the surface of the front end of the sprayer is provided with a plurality of jet holes connected to the blind holes and is also fixed with a cutter. The device can increase the drilling efficiency and the aperture quality, can form a jet hole unloading strip having a certain of diameter and depth on a coal layer by the double action of the cut drilling and jetting, can efficiently increase the gas well capacity on the coal layer and can increase the gas recovery ratio of the coal layer.

The invention discloses a stress relief blasting method based on a tunnel face notching. The method has the advantages that on the basis of a traditional notching blasting method and a traditional stress relief blasting method, the single hole arrangement is not needed, original tunneling blasting holes are subject to proper re-arrangement and deepening, and a tunnel face with an elliptical surface and an arc-shaped blasting and loosening area are blasted, so a new construction technology is formed, namely that the stress relief and the tunneling excavation are synchronously performed, and strain energy stored by surrounding rock self is sufficiently utilized; the method can be widely applied to the deep tunnel excavation in the fields of mines, water conservancy and hydropower, transportation and the like under the high ground stress condition, or the active control on strong rock blasting in the deep mining process, the rock blasting control effect is effectively improved, and the application prospect is broad.

The invention relates to a large-deformation preliminary bracing system for a high-ground-stress soft rock. The large-deformation preliminary bracing system comprises multiple circles of H-shape-steelsteel arch centers, wherein the multiple circles of H-shape-steel steel arch centers are longitudinally arranged in parallel; two longitudinal steel arch centers are connected by adopting a longitudinal connecting steel bar or channel steel; a single steel arch center is circumferentially divided into multiple segments; nodal points are connected through socket and spigot steel arch center joints; a longitudinal groove is reserved in a preliminary bracing sprayed concrete layer between the nodal points of two adjacent steel arch centers; compressible steel tubes are arranged in the longitudinal grooves. According to the large-deformation preliminary bracing system, by utilizing the compressible steel tubes which are longitudinally embedded into precast sprayed concrete and can provide resistance and spigot and socket section-steel steel frame joints corresponding to the compressible steel tube, the concession is carried out while the resisting is carried out; the deformation is enabled to be controllable; the deformation pressure borne of a preliminary bracing is released and the structural stableness of the preliminary bracing is realized.

The invention relates to a method for evaluating reheat crack sensitivity of a coarse grained region of a welding heat affected zone. The method comprises the steps that firstly, different kinds of welding heat input are adopted for manufacturing a welding test plate; secondly, during C ring sampling, the arcing position and the tail end of the test plate need to be cut by at least 50 mm, and thesampling method has two schemes; thirdly, a bolt is used for applying stress to a C ring; fourthly, the test sample is put into a heating furnace to be subjected to simulated heat treatment; fifthly,whether reheat cracks are generated on the root of the gap of the C ring or not is observed; sixthly, critical stress under the different kinds of welding heat input is determined; and seventhly, in combination with the Gleeble hot simulation test, the index is evaluated, and the evaluation criteria of the gap C ring is set. The test operation is simple, the method can be applied and popularized in the actual engineering, and the condition that an existing evaluating method cannot evaluate the reheat crack sensitivity of the coarse grained region of the welding heat affected zone can be overcome.

The embodiment of the invention discloses a steam rice cooker and a method for cooking low-sugar rice through the steam rice cooker. The steam rice cooker comprises a cooker container, a steaming rack, a boiler and an electromagnetic pump. The upper edge of the steaming rack and the inner wall of the cooker liner are sealed through a sealing ring in the cooking process; first through holes are formed in the bottom surface of the steaming rack; and a first space is formed in the steaming cavity of the steaming rack, and a second space is formed between the bottom wall of the steaming rack and the bottom wall of the inner container. The method comprises the following steps that water in the cooker container is heated; in the heating process, water vapor generated in the second space is released into the first space through second through holes; after the water is boiled, the electromagnetic pump is controlled to be started, and water is injected into the cooker container for a first preset duration so as to inject a first volume of water into the cooker container. According to the scheme of the embodiment, the rice absorbs more moisture in the cooking process of the low-sugar rice, and the problems that the rice becomes dry, half-cooked and uneven in upper and lower layers are solved.

The invention discloses a large-size display screen laminating process which comprises the following steps: laminating an optical adhesive film between a first panel and a second panel, combining to form a to-be-cured body, carrying out vacuum hot pressing on the to-be-cured body, removing pressure, continuously heating the to-be-cured body, and curing the to-be-cured body. According to the large-size display screen laminating process provided by the embodiment of the invention, in the process of continuously heating the to-be-cured body, the first panel and the second panel release the stress and freely recover the stress, meanwhile, the optical adhesive film is gradually converted into a molten state, the optical cement freely flows between the first panel and the second panel and gradually fills the gap between the first panel and the second panel, so that the space between the two panels is filled with the optical cement, the attaching flatness of the first panel and the second panel is improved, and the attaching quality of the large-size display screen is improved.

The invention discloses an epitaxial growth method for improving quality of an LED. The epitaxial growth method comprises the steps of processing a sapphire substrate, growing low temperature GaN buffer layers, growing undoped GaN layers, growing Si-doped N-type GaN layers, growing stress release layers, growing InxGa(1-x)N / GaN light-emitting layers, growing P-type AlGaN layers, growing Mg-doped P-type GaN layers, and cooling to obtain the LED; the epitaxial growth method for improving the quality of the LED solves the problem that the stress in the light-emitting layer is too large which leads to low luminous efficiency.

The invention discloses a method for electrochemically thinning and polishing InP-based RFIC wafers, which includes the following steps: an InP-based RFIC wafer is cleaned; photoresist is applied on the surface of the InP-based RFIC wafer; electrode pattern photolithography is performed on the InP-based RFIC wafer; metal electrodes are produced on the InP-based RFIC wafer; the InP-based RFIC wafer is cleaned; the InP-based RFIC wafer is rapidly alloyed; photoresist is applied on the surface of the InP-based RFIC wafer; lead pattern photolithography is performed on the InP-based RFIC wafer; lead metal is produced on the InP-based RFIC wafer; the InP-based RFIC wafer is connected with wires; the InP-based RFIC wafer is electrochemically polished; the InP-based RFIC wafer is stripped off, and thereby thinning and polishing are finished. The method effectively prevents injuries caused by mechanical thinning, realizes stress release in the process of thinning and polishing and the mirror effect of the polished surface of a substrate, and provides a new solution for the problem of a thinning and polishing process for ultrathin InP.

The invention provides a method of manufacturing a shaft forging. According to the method, by strictly controlling the number, sequence, drawing ratio and upsetting ratio of drawing and upsetting in the forging process and adopting a heat treatment process of air cooling and sand cooling instead of a conventional undulation isothermal slow cooling process, the internal stress diffusion is facilitated, deformation is not easily caused, and the hydrogen amplification effect can be achieved. The shaft forging without the white point defect can be prepared without a large gas heating furnace, so that the production cost and the energy consumption are reduced, and the production efficiency is improved.

The invention discloses a light shielding layer, a composite film layer and a preparation method thereof, and relates to the technical field of radioactive element detection.The light shielding layer is prepared on the surface of a cadmium zinc telluride crystal and comprises a plurality of first light shielding layers and second light shielding layers which are alternately stacked, and the density of the first light shielding layers is larger than that of the second light shielding layers; the stress of the second shading layer is smaller than that of the first shading layer. The light shielding layer provided by the invention is formed in a mode of alternately laminating the plurality of first light shielding layers and the plurality of second light shielding layers, so that the stress release of the light shielding layer is realized, and the influence on the density of the light shielding layer is reduced to the minimum, so that the light shielding layer can be prepared under a low-temperature condition to obtain a relatively large thickness, and the light shielding property is relatively good; and the binding force with the cadmium zinc telluride crystal is high.

The invention discloses an epitaxial growth method for improving quality of an LED. The epitaxial growth method comprises the steps of processing a sapphire substrate, growing low temperature GaN buffer layers, growing undoped GaN layers, growing Si-doped N-type GaN layers, growing stress release layers, growing InxGa(1-x)N / GaN light-emitting layers, growing P-type AlGaN layers, growing Mg-doped P-type GaN layers, and cooling to obtain the LED; the epitaxial growth method for improving the quality of the LED solves the problem that the stress in the light-emitting layer is too large which leads to low luminous efficiency.

The invention discloses a hinge joint assembly of a sealed centripetal oscillating bearing steel structure, and relates to a hinge joint of an oscillating bearing steel structure. The hinge joint assembly comprises centripetal oscillating bearings, seal rings, a pin shaft, a middle ear plate, a pair of double ear plates, pin shaft cover plates, a pair of annular flitches, bolts, nuts, spring washers and a pair of locating sleeves, wherein the centripetal oscillating bearings are provided with inner rings and outer rings; the inner rings and the outer rings can rotate and swing oppositely; the centripetal oscillating bearings are mounted in bearing holes of the middle ear plate in a tight matching manner; the annular flitches press the outer rings of the centripetal oscillating bearings and lock with the bolts; the pin shaft penetrates through the inner rings of the centripetal oscillating bearings; the locating sleeves are sleeved into the two ends of the pin shaft respectively and close to the end faces of the inner rings of the centripetal oscillating bearings; the seal rings tightly sleeve the locating sleeves and are close to the annular flitches; the double ear plates are matched with the pin shaft respectively, are close to the locating sleeves and tightly press the seal rings; and the pin shaft cover plates tightly press the locating sleeves and lock with the bolts on the pin shaft to form the hinge joint assembly of the sealed centripetal oscillating bearing steel structure.

The invention provides a neurology diagnosis and treatment device and mainly relates to the field of diagnosis and treatment equipment. The neurological diagnosis and treatment device comprises a helmet, a plurality of circles of massage holes are formed in the inner side of the helmet; a massage head is arranged in each massage hole in a sliding manner; the massage heads are elastic massage heads; a slide way is arranged on the inner side of a part, where each circle of massage holes is formed, of the helmet; a driving ring is arranged in each sliding way; a plurality of protrusions matched with the massage heads are arranged on the inner side of each driving ring; ring teeth are arranged on the outer wall of each driving ring; driving openings communicating with the sliding ways are formed in the outer wall of the helmet; and a driving device matched with the ring teeth is arranged at the position of each driving opening in the outer side of the helmet. The massage helmet has the beneficial effects that the head of a patient can be alternately massaged through the multiple circles of massage heads mounted in the helmet, so that the massage action of the head is completed insteadof manual work, and an external treatment means with a good effect is provided for the patient suffering from neurological diseases.

The invention provides a Micro-LED array based on micro-patterned graphene, a preparation method thereof, and a display device. The array includes: a substrate; a patterned graphene layer, the array of which is distributed on one side of the substrate; an electron injection layer located at The substrate is close to the side of the patterned graphene layer, and the electron injection layer is projected on the substrate between adjacent patterned graphene layers; the multi-quantum well layer is located on the side of the electron injection layer away from the substrate; the hole injection layer, The n-type contact electrode is located on the side of the patterned graphene layer away from the substrate; the p-type contact electrode is located on the side of the hole injection layer away from the substrate. In the Micro-LED array of the present invention, the good conductivity of graphene can also be directly used as the bottom electrode of the Micro-LED, and the contact between the patterned graphene layer and the electron injection layer forms a good conductive path, so that electrons can pass through the patterned graphene layer. Efficient injection into Micro‑LEDs.

The invention discloses a stress relief blasting method based on a tunnel face notching. The method has the advantages that on the basis of a traditional notching blasting method and a traditional stress relief blasting method, the single hole arrangement is not needed, original tunneling blasting holes are subject to proper re-arrangement and deepening, and a tunnel face with an elliptical surface and an arc-shaped blasting and loosening area are blasted, so a new construction technology is formed, namely that the stress relief and the tunneling excavation are synchronously performed, and strain energy stored by surrounding rock self is sufficiently utilized; the method can be widely applied to the deep tunnel excavation in the fields of mines, water conservancy and hydropower, transportation and the like under the high ground stress condition, or the active control on strong rock blasting in the deep mining process, the rock blasting control effect is effectively improved, and the application prospect is broad.

The invention discloses an electric pressure cooker, particularly to an electric pressure cooker capable of receiving pressure or temperature signal on cooker cover and realizing pressure relief. Theelectric pressure cooker comprises a cooker body, an inner cooker arranged inside the cooker body, a cooker cover capable of rotating around the central axis of the inner cooker, and a control circuitarranged between the cooker body and the inner cooker, wherein a cooker cover is provided thereon with a cavity that is communicated with the inner cooker, a sliding block movably connected with theinner cooker and capable of sliding upwardly and downwardly inside the electric pressure cooker is arranged in the lower part of the cavity, a dynamically sealed element contacting with the inner wallof the cavity is arranged on the sliding block, and an elastic element is arranged between the upper part of the sliding block and the top wall of the cavity; a switch triggered by the sliding of thesliding block is arranged inside or outside the cavity, and / or a temperature sensor is installed on the sliding block, and the switch and / or temperature sensor are connected with the control circuit.The inventive electric pressure cooker can accurately receive signal of the pressure or temperature inside the cooker and realize rapid pressure relief. The inventive electric pressure cooker has theadvantages of smart design, simple structure, and low production cost.

The invention provides an epitaxial structure based on Nano-LED application, a chip and a preparation method, a patterned substrate comprises a plurality of protrusions which are mutually isolated through isolation columns and are distributed in an array, and grooves are formed between the protrusions and the corresponding isolation columns; and the epitaxial laminated layers are formed in the grooves, cover the surfaces of the bulges and are isolated from one another through the isolation columns. Therefore, based on the patterned substrate formed by a plurality of bulges which are mutually isolated by the isolation columns and are distributed in an array, a plurality of mutually isolated epitaxial laminated layers can be formed on the surfaces of the bulges, namely, each protrusion forms an independent light-emitting unit; therefore, the stress release of the epitaxial material of the light-emitting unit can be well realized, the high-quality epitaxial material is obtained, and the Nano-LED chip under low current has high light-emitting efficiency.

The invention relates to the technical field of tunnel construction methods, in particular to an advanced stress release construction method for a seriously large-deformation tunnel, which comprises the following steps: stopping construction when the distance from a main tunnel to a seriously large-deformation section of the tunnel is a multiple of the hole diameter of the main tunnel, excavating a connecting transverse channel, stopping main tunnel construction during the period, excavating an advanced parallel pilot tunnel, and excavating an advanced parallel pilot tunnel; the leading parallel pilot tunnel is parallel to the main tunnel, the excavation direction is also consistent, main tunnel construction is recovered, and the distance between the excavation face of the parallel pilot tunnel and the excavation face of the main tunnel is kept to be 5-6 D. Compared with the prior art, stress release in the excavation process is effectively achieved in the mode that the connecting transverse channel and the leading parallel pilot tunnel are arranged in the main tunnel excavation process, and the construction efficiency is improved. Meanwhile, the size of the excavated hole diameter and construction quality control are strictly restrained, the supporting stability is guaranteed, the construction difficulty of the seriously-deformed tunnel is effectively reduced, the working procedure is simple, excavation and primary supporting of all the parts are easy to control, and the construction risk is reduced.

The invention provides an overload and overpressure protection device of an ultrahigh pressure plunger pump. The overload and overpressure protection device comprises a connector, a rupture disk, a pressing head, a protection cover and a sealing ring, wherein outer threads are arranged at the upper end and the lower end of the outer circumference of the connector; a first through hole is formed inthe center of the connector in the axis direction; the lower surface of the rupture disk covers and presses the upper end face of the connector; the pressing head is of a round pipe structure; the lower end of the pressing head is tightly pressed on the outer edge of the upper surface of the rupture disk; the protection cover is in threaded connection to the top of the connector; the upper end ofthe pressing head is in tight pressing contact with the top of the inner side of the protection cover; the protection cover is fixed to the top of the protection cover; a gap is formed between the inner side face of the protection cover and the outer side face of the protection cover; a round groove is formed in the center of the top of the inner side of the protection cover; a plurality of second through holes are formed in the outer circumference of the upper side part of the protection cover in the circumferential direction; an annular groove is formed in the middle of the lower end face of the connector; and the sealing ring is embedded in the annular groove in a matched manner. The overload and overpressure protection device is scientific in design, easy to mount, simple in structure, large in pressure bearing and wide in overpressure range.

A multi-free surface composite elastic element, including metal parts and elastic parts, the metal parts and elastic parts are combined to form a composite elastic element; the metal parts of the composite elastic element include metal outer rings, metal inner rings and metal side rings, metal The outer ring and the metal side ring are arranged in parallel to the axial direction, there is a gap in the axial direction between the metal outer ring and the metal side ring, the metal inner ring is located on the inner surface of the inner diameter of the metal outer ring, and the metal inner ring is also in the metal outer ring. Arranged in parallel, there is also a gap between the metal inner ring, the metal outer ring and the metal side ring; in the gap formed by the metal outer ring, the metal inner ring and the metal side ring, there is an elastic body, and the elastic body and the metal outer ring, metal The inner ring and the metal side ring are compounded together and form a composite elastic element with a multi-elastomer free surface. The composite elastic element of the present invention can realize the matching of stiffness characteristics in a special ratio, meet the requirements of large axial stiffness and reduce radial stiffness, and maintain the characteristics of low deflection and low torsional stiffness.

The invention discloses a supporting method of a swing type anti-seismic recoverable anchor rod suitable for complex slope supporting, the anchor rod structure comprises an anchoring section, a free section and an anchor head, and the anchor head comprises a base plate, a rigid sliding wall, an anchorage device, an anti-seismic device and an anchorage device lifting device. The slope supporting method comprises the following steps: 1, drilling holes; 2, loading an anchor; 3, grouting maintenance; 4, constructing a retaining wall or a surface layer; 5, mounting an anchor head; and 6, tensioning and locking. The method further comprises the step of unsealing after earthquake disasters. And resetting the anti-seismic device. The method effectively solves the problems that in a traditional slope reinforcing method, an anchor rod cannot resist earthquake loads and is damaged or failed in anchoring, so that a slope rock-soil body collapses and slides down, and the method is advanced in anti-seismic concept, excellent in anti-seismic performance and high in anti-seismic performance. The side slope supporting method of the swing type anti-seismic recoverable anchor rod is suitable for complex side slope supporting, can achieve graded anti-seismic and secondary recovery after an earthquake, and has wide application prospects and remarkable economic and social benefits.

The invention provides a semiconductor structure. Grooves located between adjacent contact pads are arranged in the semiconductor structure. The insulating filling layer filled in the groove is composed of at least two insulating parts, so that the internal stress of the insulating material in the groove can be more effectively relieved, and the problem that the adjacent semiconductor device is damaged due to the high-strength internal stress of the insulating material in the groove can be improved.

The invention discloses a steel wire rope destressing device which comprises a supporting base and a permanent seat, wherein two ends of the permanent seats are respectively connected with an optical shaft and a main shaft; two sides of the supporting base are provided with bearings; the optical shaft and the main shaft are correspondingly assembled in the bearings; the outer end of the optical shaft is connected with a driving component; the outer end of the main shaft penetrates through the bearing and is provided with a retaining ring by virtue of end threads; the permanent seat is sequentially provided with a push plate and a dead plate from top to bottom; multiple pulleys are correspondingly arranged on the push plate and the dead plate; the top of the permanent seat is provided with an adjusting screw for regulating the height of the push plate; the end part of the adjusting screw props against the push plate. According to the destressing device, the whole device is driven by virtue of the driving component to rotate 360 degrees; meanwhile, the adjusting screw is used for regulating the amount of draught of the pulley relative to a steel wire rope strand, so that the effect of destressing the strand in a 360-degree manner can be realized; not only can the stress of the steel wire rope strand be eliminated, but also a solid foundation is laid for producing qualified steel wire ropes.

A suspension suspension method for a train motor, in which the train motor is suspended on the bogie of the train through a composite elastic element; the composite elastic element is a suspension combined elastic member, and the train motor is suspended on the On the bogie, the suspension combined elastic part is connected with the train motor through fasteners to form the suspension of the train motor. The suspension type combined elastic member is composed of two elastic elements, the two elastic elements are clamped on the bogie in a suspended manner from both sides of the bogie, and the two elastic elements are combined by fasteners to form a suspension Combined elastic parts. The suspended combined elastic member is axially connected with the train motor through fasteners, so that the train motor is suspended on the bogie through the suspended combined elastic member. The invention can effectively improve the condition of train motor suspension, obtain better dynamic characteristics, and simultaneously meet the requirements of train suspension in various harsh environments.

A method for suspending a motor by an axially precompressed combined elastic element includes suspending a motor of a vehicle on a bogie of that vehicle through an elastic composite elastic element; The elastic composite elastic element is an axial precompression combined elastic part, the vehicle motor is suspended on a bogie by the axial precompression combined elastic part, and the axial precompression combined elastic part is connected with the vehicle motor through a fastener to form the suspension of the vehicle motor. The axial precompression combined elastic part is composed of two elastic elements, the two elastic elements are clamped on the bogie by axial precompression from both sides of the bogie, and are combined together by axial precompression of fasteners to form an axial precompression combined elastic part. The axially precompressed composite elastic part is axially connected with the vehicle motor through the fastener, so that the vehicle motor is suspended on the bogie through the axially precompressed composite elastic part. The method for suspending a motor by an axially precompressed combined elastic element can effectively improve the condition of vehicle motor suspension, and meet the requirements of vehicle suspension in various harsh environments.

A method for suspending a motor by an axially precompressed combined elastic element includes suspending a motor of a vehicle on a bogie of that vehicle through an elastic composite elastic element; The elastic composite elastic element is an axial precompression combined elastic part, the vehicle motor is suspended on a bogie by the axial precompression combined elastic part, and the axial precompression combined elastic part is connected with the vehicle motor through a fastener to form the suspension of the vehicle motor. The axial precompression combined elastic part is composed of two elastic elements, the two elastic elements are clamped on the bogie by axial precompression from both sides of the bogie, and are combined together by axial precompression of fasteners to form an axial precompression combined elastic part. The axially precompressed composite elastic part is axially connected with the vehicle motor through the fastener, so that the vehicle motor is suspended on the bogie through the axially precompressed composite elastic part. The method for suspending a motor by an axially precompressed combined elastic element can effectively improve the condition of vehicle motor suspension, and meet the requirements of vehicle suspension in various harsh environments.