62results about How to "Reduce the impact of force" patented technology

The invention discloses a method for hoisting a net rack structure and constructing a roofing enclosure, comprising the following steps: (1) carrying out the integral ground splicing construction of a steel structural net rack and a steel structural truss according to the conventional construction process; (2) installing a main purlin and a secondary purlin of the roofing enclosure; (3) paving roofing bottom-layer profiling steel plates on positions except for a reserved ventilation opening and a base plate at a side span position; (4) integrally hoisting the steel structural net rack and the steel structural truss, and then installing and fixing the same; and (5) paving the roofing bottom-layer profiling steel plates on the reserved ventilation opening and the side span position. The invention only needs to install safe separation nets, protective barriers and lifelines in areas of the bottom and the circumference of a roofing daylighting band, which are not paved with the roofing base plates; and in addition, compared with an original construction process which needs to fully install the safe separation nets, the protective barriers and the lifelines under a steel structure, the invention greatly saves the input amount of safety protection facilities.

The invention discloses a water-soluble antibacterial monocarboxylic chitosan as well as a preparation method and application thereof. The preparation method of the monocarboxylic chitosan is characterized by comprising the following steps: dissolving macromolecular chitosan in a diluted acetic acid solution, and then selectively oxidizing part or all of hydroxyl groups at the C6 site of the chitosan into carboxyl groups by utilizing a concentrated nitric acid-concentrated phosphoric acid-sodium nitrite system, thereby obtaining the monocarboxylic chitosan. The water-soluble antibacterial monocarboxylic chitosan disclosed by the invention can be used for carrying out amide modification on real silk fabrics so as to obtain monocarboxylic chitosan amide modified real silk fabrics. The method disclosed by the invention is simple in operation, high in reaction speed and easy to control, the prepared monocarboxylic chitosan amide modified real silk fabrics have lasting and efficient antibacterial activity and good wearability and are environment-friendly, and the negative effects on good real silk characteristics and human health caused by using chemical crosslinking agents in conventional chitosan modification are overcome.

The invention provides an orthotropic steel bridge deck structure with an HRP cover plate. The orthotropic steel bridge deck structure comprises a hot-rolled ribbed cover plate, a plurality of longitudinal stiffened ribs and transverse ribs. The HRP cover plate has the characteristics of good integrity and high rigidity. The connection part between a plane plate and ribs adopts an arc-shaped gradual transition to effectively avoid the problem of excessive local stress on a steel bridge deck under the action of concentrated wheel loads. Welding seams are arranged on the positions, where the stress amplitude is relatively small, of web plates of longitudinal ribs, and the welding process is changed from single-side partial penetration welding to butt-joint complete penetration welding so asto effectively improve the anti-fatigue performance of the steel bridge deck. The orthotropic steel bridge deck structure with the HRP cover plate has the advantages of simple structure, reasonable stress, high durability, convenient maintenance and reinforcement and wide application prospects in the field of steel-structure and composite-structure bridge engineering.

The invention discloses a cat-head type tower for a one-way overhead line cable T joint. The cat-head type tower comprises a tower body, ground wire cross arms, middle-phase wire cross arms, side-phase wire cross arms, upper-layer cable auxiliary cross arms and lower-layer cable auxiliary cross arms; the two layers of ground wire cross arms are located on the uppermost portion of the tower body, arranged to be perpendicular to the line direction and used for hanging ground wires; the middle-phase wire cross arms are located under the ground wire cross arms, V-shaped suspension strings are fixed to the inner upper portions of the middle-phase wire cross arms and used for hanging middle-phase wires, and double-I-type downward cable leading terminals are arranged under wire hanging points arranged in the middle-phase wire cross arms. The cat-head type tower for the one-way overhead line cable T joint has the advantages that the cable T joint is achieved by adopting one base tower, the building cost is low, small area is occupied, little influences on stress of adjacent poles and towers are generated, an original line arrangement mode is not changed, adjacent tower transformation is generally not needed, and the cat-head type tower is suitable for building adjacent linear towers and tension-resistant towers.

The present invention relates to a system (110) and a method for sorting a plurality (112) of seed grains (114). The system (110) comprises an individualizing device (120), a sampling device (132) for introducing the individualized seed grain (114) into a measuring device (136) for the classification of the individualized seed grain (114), a receiving device (146, 200) for receiving the classified seed grain (114) and also a transporting device (118, 124, 134, 144, 152) for the at least partially pneumatic transport of the seed grain (114).

The invention also relates to the sampling device (132), which comprises an outer tube (160) for receiving the sampling device (132) into the measuring device (136), a sample chamber (138) of the measuring device (136) being provided within a volume (164) of the outer tube (160). The sampling device (132) also comprises an inner tube (162), which is inserted in the outer tube (160) and has a lower opening (166), whereby the individualized seed grain (114) can be introduced into the volume (164) of the outer tube (160). An intermediate space (170) formed between the outer tube (160) and the inner tube (162) is designed in such a way that the individualized seed grain (114) can be discharged by pneumatic means out of the outer tube (160) through the inner tube (162) into a receiving device (146, 200) for the classified seed grain (114).

The system (110) is suitable as an automated high-throughput sorting of seed grains (114) by using the measuring device (136) that is designed for investigations of the seed grains (114) by means of a method of nuclear magnetic resonance (140) and/or an optical measuring method.

A hold hoop type automatic leveling and anchoring device for replacement of steel pipe concrete arch bridge suspenders comprises upper cross beams, tensioning-end anchorage devices I and II, upper and lower temporary ropes, transfer beams, fixed-end anchorage devices I and II,lower supporting beams and two hold hoop type arch apex anchoring and anti-slip systems installed on a steel pipe concrete arch bridge arch, wherein each hold hoop type arch apex anchoring and anti-slip system consists of two rotary lifting appliances, an anti-slip steel box, an upper cross beam, an anti-slip hold hoop and a rubber pad. In a working state, the upper and lower temporary ropes respectively penetrate through the upper cross beam or the lower transfer beam and a jack and are anchored by using the tensioning-end anchorage devices I and II and the fixed-end anchorage devices I and II, and the lower supporting beams support the lower surfaces of suspender cross beams. The rubber pads are arranged between the anti-slip hold hoops and the side faces of the steel pipe arch, the lower-portion cambered surfaces of the anti-slip steel boxes are fixedly connected with the anti-slip hold hoops, one side of each upper-layer #-shaped structure of the upper cross beams tightly attaches to the side face of the corresponding anti-slip steel box, and the other side of each structure is in bolted connection with the corresponding anti-slip steel box through high-strength screws. The hold hoop type automatic leveling and anchoring device is simple in structure, smaller in size, simple and convenient to construct and high in work efficiency.

The invention discloses a new corn header, comprising a corn snapping platform and a stem cutting and feeding device. The invention is characterized in that, the corn snapping platform comprises a corn snapping device and an ears conveying device fixedly connected with each other; the stem cutting and feeding device comprises a stem cutting device and a stem feeding device fixedly connected with each other; the corn snapping platform and the stem cutting and feeding device are respectively hinged at the front part of the body of a corn harvester; a header rotary device used to promote the rotation and the lifting of the corn header is arranged between the stem cutting and feeding device and the body; a header differential device capable of promoting the rotation and the lifting of the corn snapping platform is arranged between the corn snapping platform and the stem cutting and feeding device. The corn header has the advantages that, corn ears snapping and stem cutting are realized at the same time; the structure is compact; corn ears snapping and stem cutting are controlled respectively, so operation, assembling and maintenance are facilitated.

The invention relates to the technical field of extrusion forming equipment, in particular to a tile-type combined roller cover. The tile-type combined roller cover comprises a roller cover block, roller cover hoops, screw rod fasteners, roller cover keys and a roller shaft. The roller cover block is provided with pillow-shaped concave bags which are arranged in a honeycomb mode, bosses with a taper are arranged at two sides of the roller over block, a concave-convex mortise and tenon structure is arranged on the inner arc surface, and key grooves are formed in the inner arc surface; the roller cover hoops are provided with bosses with a taper, and grooves are formed in the position, corresponding to the roller cover keys, of the inner arc face; each screw rod fasteners comprises a long screw rod penetrating through the roller cover and the roller cover hoops at two ends, and comprises hexagonal nuts and cover-type nuts which are arranged at two ends; each roller cover key is providedwith a stepped hole for containing a hexagon socket cap screw; and the roller shaft is provided with an annular groove for installing the roller cover block, two groups of tile-type combined roller covers are installed, the key grooves for the roller cover keys are arranged in the groove, and a threaded hole is formed in the center of the bottom of each key groove.

The invention relates to a replacing or newly-added fabricated balcony structure for old houses and a construction method of the replacing or newly-added fabricated balcony structure to mainly solve the technical problems that existing old residence communities are not provided with balconies, and balconies need to be added. The replacing or newly-added fabricated balcony structure comprises a primary structure and further comprises a newly-added fabricated balcony structure body connected with an external wall lower ring beam of the primary structure in an anchored mode. The newly-added fabricated balcony structure body comprises a newly-added column foundation, newly-added steel stand columns, a newly-added prefabricated concrete balcony plate, newly-added steel handrails and newly-addedglass baffles, wherein the newly-added prefabricated concrete balcony plate is arranged on the outer side of an external wall lower ring beam of the primary structure of each layer in a connected mode, the newly-added steel stand columns are arranged at the outer side end of the newly-added prefabricated concrete balcony plate in a connected mode, and connecting pieces are arranged between the newly-added steel stand columns and the newly-added prefabricated concrete balcony plate of each layer. The replacing or newly-added fabricated balcony structure has the remarkable advantages that the newly-added fabricated balcony is easy and convenient to build, the work period is short, and construction is free and flexible.

The invention relates to an ankle joint assisting exoskeleton device and assisting shoes. The device comprises a leg assembly, a foot assembly and an elastic part, wherein the leg assembly comprises aleg frame, the leg frame is used for being wound around a leg of a user, the foot assembly is rotationally connected with the leg frame and used for being worn on a foot of the user, and the elasticpart is arranged at the joint of the leg frame and the foot assembly and used for generating elastic deformation or restoring to the natural state when an included angle between the leg frame and thefoot assembly changes within a preset angle range so as to store or release energy. The ankle joint assisting exoskeleton device can store negative work in the walking process of the user and feed thenegative work back to the user when positive work needs to be done so as to provide walking assistance for the user, and the influence on leg muscle power generation of the user can be greatly reduced.

The invention relates to an externally-arranged fabricated balcony structure adopting steel reinforced concrete, and a construction method of the externally-arranged fabricated balcony structure. Thetechnical problems that an existing old residence is not provided with balconies, thus the building use function cannot meet the current high-quality living needs of people, and the balconies need tobe additionally arranged to enable the life of residents to be more comfortable are mainly solved. The externally-arranged fabricated balcony structure has the most significant advantages that an externally-arranged fabricated balcony is simple and convenient, short in construction period, free and flexible, and if a technology is applied and popularized, the significant practical significance forexternally arranging the fabricated balcony in the old residence is achieved.

The invention discloses a corrugated steel web temporary fixation structure independent of a template. The corrugated steel web temporary fixation structure comprises a plurality of corrugated steel web sections, longitudinal steel supports and transverse steel supports; the multiple corrugated steel web sections are combined to form a square structure, every two adjacently-arranged corrugated steel web sections are fixedly connected through the corresponding longitudinal steel supports, and every two oppositely-arranged corrugated steel web sections are fixedly connected through the corresponding transverse steel supports; and the number of the longitudinal steel supports for connecting two adjacent corrugated steel web sections is two, and the two longitudinal steel supports are arranged in parallel. By means of the temporary fixation measures, the problem that during construction at present, steel webs are fixed through bottom dies or side dies, consequently, sampling wastes time, and plane deviations are caused on the steel webs before and after pouring is carried out is solved, and influences of the deviations of the steel webs on box girder stress are reduced.

The invention relates to the technical field of bridge earthquake resistance. The invention relates to a damper, in particular to a damper with limiting and shearing functions. The damper comprises adamper body, the damper body comprises a cylinder body, a first pin shaft hole is formed in one end of the cylinder body, a first pin shaft is arranged in the hole, a piston rod penetrates out of theother end of the cylinder body and then is connected with a second pin shaft base, a second pin shaft hole is formed in the piston rod, a second pin shaft is arranged in the hole, and a third pin shaft hole facilitating pin shaft insertion is formed in the cylinder body; the other end of the piston rod is located in the cylinder body and provided with a piston, the piston is provided with a fourthpin shaft hole facilitating insertion of the pin shaft, a third pin shaft is arranged in the third pin shaft hole, one end of the third pin shaft is located in the third pin shaft hole, and the otherend of the third pin shaft is located in the fourth pin shaft hole. And the third pin shaft is a shear pin. The rigid supporting effect can be achieved on the low-speed occasion, the damping effect is achieved when the high-speed or external force impact effect is large, and the stability and the firmness of a building structure in daily use can be effectively kept.

The invention discloses a construction method of a flexible connecting structure between prefabricated components and building bodies. The construction method comprises the following steps that S1, the lowermost building body is poured; a mortise groove is formed in the top surface of the building body; S2, the prefabricated components are inserted into the cast-in-place building body in a supporting mode; a tenon matched with the mortise groove is arranged at the lower end of the prefabricated components; S3, a first flexible layer for lowering the connecting rigidity between the prefabricated components and the upper cast-in-place building body is laid on the top surfaces of the inserted prefabricated components; S4, the upper building body is poured on the first flexible layer; and S5,the steps S2-S5 are repeated to complete the flexible connection between the prefabricated components and the building bodies. According to the construction method of the flexible connecting structurebetween the prefabricated components and the building bodies, the flexible connection between the prefabricated components and the building bodies is realized, and the influence of the prefabricatedcomponents on the rigidity of the building bodies is avoided.

The invention relates to a gas well casing annulus seal integrity failure prevention device, which comprises a sleeve adhered to the outer periphery of the casing and used for force-protecting the cement sheath. Wherein, the elastic modulus of the sleeve is 5-10MPa, the Poisson's ratio is 0.25-0.5, and the thickness is 4-8mm. The invention adds a layer of buffer medium on the outer periphery of the casing to completely or to a certain extent absorb the deformation of the casing caused by the change of the downhole pressure, reduce the influence of the internal pressure of the casing on the force of the cement sheath, and avoid the cement when the internal pressure of the casing is too high. The failure and damage of the ring can be prevented to prevent the failure of the integrity of the casing annulus seal and the resulting problems of annular pressure and annular channeling.

The invention discloses a tracheal intubation fixing apparatus for anesthesia departments. The tracheal intubation fixing apparatus comprises a fixing seat, an upper fixing sheet slide seat and bandage fixing seats. The upper fixing sheet slide seat is slidably connected onto the fixing seat, the bandage fixing seats are positioned on the outer side of the fixing seat and are detachably connectedwith the fixing seat, a cannula groove, a sputum suction hole and an upper fixing sheet slide groove are formed in the fixing seat, and a sponge pad, an upper tooth pad, a lower tooth pad and bandageclamp seats are arranged on the fixing seat; an upper fixing sheet and a lower fixing sheet are arranged at the front of the fixing seat. The tracheal intubation fixing apparatus has the advantages that the upper fixing sheet can slide by the aid of a spring by a certain distance, and accordingly cannulas can be conveniently preliminarily clamped; a fastening clamp sheet arranged on the upper fixing sheet can be clamped with the lower fixing sheet, accordingly, the cannulas can be fixed and constrained without influence on vision of patients, influence on stress of devices can be reduced in fixing procedures, and the cannulas can be conveniently fixed.

The invention relates to a connected building. The connected building comprises main frame structures, orridor structures, longitudinal limiting components and transverse limiting components; two or more main frame structures are arranged side by side, the corridor structures are arranged between every two adjacent main frame structures, and the ends of the corridor structures are in lap joint with the main frame structures through buffer limiting structures; the longitudinal limiting components are arranged on the side edges of the buffering limiting structures and used for limiting longitudinal translation of the corridor structures in the length direction; the transverse limiting components are arranged on the side edges of the buffering limiting structures and used for limiting transverse translation of the corridor structures in the width direction; and the limiting directions of the two longitudinal limiting components located at the two ends of the corridor structures are opposite, and the limiting directions of the two transverse limiting components located at the two ends of the corridor structures are opposite. According to the connected building, the corridor structuresdo not affect the main frame structures, can be firmly connected with the main frame structures and are not prone to falling off from the main frame structures.

The invention relates to a micro-injection electronically-controlled fuel injector with a pressure-maintaining structure. According to the micro-injection electronically-controlled fuel injector, an upper fuel cavity as well as a main fuel inlet channel, a main fuel return channel, a fuel inlet channel and a fuel return channel which communicate with the upper fuel cavity are formed in the upper body of the fuel injector; the lower body of the fuel injector is connected to the lower end of the upper body of the fuel injector through a fuel injector fastening nut, a lower fuel cavity is formed in the lower body of the fuel injector, and the lower fuel cavity communicates with the main fuel return channel; a nozzle member is connected to the lower end of the lower body of the fuel injector through a nozzle fastening nut and communicates with the lower fuel cavity, and further communicates with a main fuel channel penetrating through the lower body of the fuel injector; and an electromagnetic valve is connected to the left side of the upper part of the upper body of the fuel injector through an electromagnetic valve fastening nut, one end part of a control valve element of the electromagnetic valve stretches in the upper fuel cavity, and the other end part of the control valve element is abutted against an electromagnetic valve return spring arranged at the central part of an electromagnet. According to the micro-injection electronically-controlled fuel injector disclosed by the invention, a fuel inlet process and a fuel return process can be mutually independent, so that the influence of the mutual interference of fuel flowing in the fuel inlet process and the fuel return process on a fuel injection process is avoided; and the opening speed of a needle valve can be increased, so that the injection characteristic of a micro-injection fuel system is improved.