71results about How to "Reasonable length" patented technology

The invention discloses a soft rock tunnel deformation control method based on anchor rod force analysis. A soft rock tunnel is excavated and subjected to deformation control construction from back to front according to multiple segments, and when any segment is excavated and subjected to deformation control construction, the method includes the steps that 1, surrounding rock basic mechanical parameters are determined; 2, the tunnel reserved excavated volume is determined; 3, the tunnel is excavated; 4, a tunnel preliminary bracing structure is determined; 5, tunnel deformation control construction is carried out, wherein in the tunnel preliminary bracing construction process, a flexible mold bracing structure is constructed from back to front; 6, a next segment is excavated and subjected to deformation control construction; 7, the step 6 is repeated multiple times till the full excavation and deformation control construction process of the soft rock tunnel is completed. The soft rock tunnel deformation control method is reasonable in design, convenient to achieve and good in use effect, the reserved excavated volume is determined according to the surrounding rock deformation condition of the soft rock tunnel, the flexible mold bracing structure is adopted for carrying out full-section bracing on the tunnel, the flexible mold bracing structure and the tunnel preliminary bracing structure are in coordination deformation, and deformation of the soft rock tunnel can be effectively controlled.

The invention discloses an excavation and preliminary bracing method for a soft rock tunnel. The excavation and preliminary bracing construction for the soft rock tunnel are performed in sections from back to front. When any section is subjected to excavation and preliminary bracing construction, the method comprises the following steps: 1) confirming basic mechanical parameters of the surrounding rock; 2) confirming the reserved excavated volume of the tunnel: confirming the reserved excavated volume of the currently constructed section according to a theoretical value of inward displacement of the surrounding rock of the soft rock tunnel after being braced; 3) excavating the tunnel; 4) confirming a preliminary bracing structure of the tunnel; 5) constructing the preliminary bracing of the tunnel; 6) performing the excavation and preliminary bracing construction of the next section; and 7) repeating the step 6) till all the processes of the excavation and preliminary bracing construction of the soft rock tunnel are completed. The method disclosed by the invention has the advantages of simple steps, reasonable design, convenience in realization and good use effect; the reserved excavated volume is confirmed according to the surrounding rock deformation condition of the soft rock tunnel; and the steel bracket and the anchoring net sprayed preliminary bracing structure are coordinated for performing all-section preliminary bracing on the tunnel.

The invention discloses a heat pipe performance detection device. The heat pipe performance detection device comprises a heating assembly, a heat radiation assembly and a bearing part. The heating assembly and the heat radiation assembly respectively comprise a fixed part and a mobile part which can be relatively separated and united, at least a measuring accommodation part capable of accommodating a heat pipe to be detected is arranged between opposite surfaces of the heating assembly and the heat radiation assembly, at least a temperature sensor is arranged in the middle of the measuring accommodation part, the heating assembly is provided with at least an accommodation aperture communicated with the measuring accommodation part and used for accommodating the temperature sensor and at least an accommodation hole accommodating a heating element for the heat pipe to evaporate heat, the accommodation aperture is perpendicular to an extension direction of the accommodation hole, the heat radiation assembly is provided with at least a cooling structure, the bearing part comprises a locating seat and two adjustment pieces arranged on the locating seat and capable of being slideably adjusted relative to the locating seat, and the two adjustment pieces respective bear the heating assembly and the heat radiation assembly and adjust and locate positions.

The invention discloses a center-feeding cyclone pulverized coal combustion device adopting a pre-combustion chamber and double-layer jet flow to separate secondary air, and relates to a pulverized coal combustion device, and the center-feeding cyclone pulverized coal combustion device solves the problems that an existing pulverized coal combustion device is high in NOx discharge amount, is poor in flame stability, is severe in slag-bonding and is poor in after-combustion. High-concentration pulverized coal gas flow is conveyed in a primary air tube; a cyclone pulverized coal combustor is arranged at the front end of the pre-combustion chamber; the cyclone pulverized coal combustor and the pre-combustion chamber are coaxially arranged, and each pipeline spray hole of the cyclone pulverizedcoal combustor is flush to the inner wall of the pre-combustion chamber; a plurality of separating secondary air spray holes are distributed at the outer side of the pre-combustion chamber in a double-layer annular mode; a circle on which the centers of each layer of separating secondary air spray holes are located is coaxial with the cyclone combustor; the two layers of separating secondary airspay holes are uniformly crossed with one another; each separating secondary air spray hole is flush to the inner wall of a furnace hearth; and included angles beta between the center lines of the separating secondary air spray holes and the axis of the air tube at each stage of the cyclone combustor are 0-60 degrees. The center-feeding cyclone pulverized coal combustion device is used for an industrial pulverized coal boiler.

A unitary conduit repair coupling for joining first and second conduits each having open ends spaced from one another a predetermined distance, wherein the repair coupling comprises a unitary tubular body having a first end portion with an elongated female portion and an opposite second end portion with a male portion, the unitary body having a total length greater than the predetermined distance between the ends of the first and second conduits, the female portion having an internal size capable of receiving the first conduit end, the male portion having an external size capable of entering into the second conduit end, and the female portion having sufficient length to permit a retracting displacement over the end portion of the first conduit to permit positioning of the male portion in alignment with the second conduit and subsequent displacement into the second conduit end while maintaining contact with the first conduit.

The invention relates to a rapid blasting groove broaching method suitable for different sectional heights. The rapid blasting groove broaching method suitable for the different sectional heights is characterized by comprising the following steps of 1) designing a groove broaching blast hole; 2) accurately positioning the construction of the blast hole; 3) selecting a reasonable charging structure; 4) determining a reasonable subsection microsecond delay; 5) selecting a reasonable blockage length; and 6) judging the blasting effect of a broached groove. According to the scheme, aiming at the different sectional heights, the groove broaching efficiency is improved, the groove broaching is rapidly completed, the broached groove is directly connected with the upper layer through one-time blasting, the success rate of groove drawing broaching is ensured, and the secondary entering treatment fault is avoided.

The invention discloses a method for calculating lengths of diamond interchange deceleration ramps by utilizing traffic conflicts. The method comprises the following steps of establishing a conflict delay model; and analyzing factors of a ramp length, wherein the ramp length is decided through the number of delayed vehicles in a conflict area, the number of the delayed vehicles in the conflict area is decided through the number of delayed vehicles in a unit time and an average delay time of the vehicles, the number of the delayed vehicles in the unit time indicates a difference between the number of vehicles passing through the conflict area at once and the number of vehicles passing through the conflict area in the unit time, the number of vehicles passing through the conflict area at once is decided through the probability that one vehicle stream occurs and the probability that the vehicle stream passes through a time headway, the number of vehicles passing through the conflict area in the unit time is decided through the number of vehicles passing through the conflict area at once and a flow rate of the vehicle stream, and the average delay time is the sum of the delay time, in the conflict area, of the vehicle stream.

The invention discloses a thrombus-taking bracket equipped with barbs in silk screen crossed positions, and belongs to the technical field of interventional therapy. The thrombus-taking bracket comprises a mesh cage formed by a nickel-titanium tube by laser cutting through high-temperature shaping, wherein the mesh cage comprises a plurality of elastic filaments, wherein the elastic wires intersect each other to form a plurality of intersection end surfaces; each of the intersection end surfaces is provided with a barb unit which extends towards the inner side of the inner mesh cage; each barbunit has a root portion which extends from one side, close to the distal end, of the intersection end surface portion; and the barb unit has an inclined rod which extends away from the root portion and obliquely extended in the distal direction. The thrombus-taking bracket has the advantages that the contact area between the thrombus-taking bracket and a thrombus can be more reasonably increased,and thrombus slipping is avoided; and in addition, a welded developing ring or a developing block is additionally arranged at the tail end of each barb unit, so that the positioning and developing effect of the bracket in a body can be enhanced.

A method for breeding earthworm in greenhouse by using domestic sludge with cow dung as bed substrate is characterized in that performing earlier stage processing on sludge, manufacturing a earthworm foundation bed and performing introduction, performing observation for 1-2 days, and then testing a material; adding a sludge mixed material to the surface of the foundation bed every 8.5 or 11 days, wherein the amount of the sludge mixed material is 60-70 kg/m2 every time; spraying the foundation bed with a palatable conditioning solution once, and keeping the water content of an organic waste sludge mixture in the foundation bed being 70-80 wt%; performing harvesting when the density of the earthworm reaches 8-10 kg/m2; arranging the material after harvesting, and expanding the foundation bed when the height of the foundation bed is 35-40 cm; exposing a core of the original foundation bed after expanding of the foundation bed, and removing the core to a designated place to be stored; and resetting the original foundation bed, turning over the original foundation bed, allowing the density of the earthworm to decrease, and performing processing and production. The method can solve the problem that the biochemical sludge cannot be continuously processed by using earthworm due to cold weather, can improve the processing efficiency, increase the bed expanding speed, is conductive to long term domestication of the earthworm, and is suitable for earthworm industrialization large-scale biochemical sludge processing.

The invention discloses an upper structure of a large scale aluminium cell, which comprises a cross beam (1), a vent stack (2), a positive bar (3), an anode carbon block group (4), an anode winding gear (5), a crust breaking charging device (6). The anode carbon block group (4) uses the binode structure; wherein, the binode structure of the anode carbon block group (4) is that an aluminum guide bar is connected with two carbon blocks (8) by eight steel claws (7); every four steel claws (7) are distributed to each carbon block (8). The eight steel claws (7) and one anode rod are welded into one whole. The anode winding gear (5) uses an end single motor for concentrating driving. The cross beam (1) uses the plate web girder structure. The vent stack is arranged below the cross beam (1). The positive bar (3) uses the split type structure. The web plate of the cross beam (1) is provided with a hole (9) which a balance busbar passes through. The anode has 40-56 pieces and is configured by the busbar with 5-7 dot large area incoming electricity.

The invention discloses a tunnel excavation construction method based on zonal fracturing evolution analysis of surrounding rocks. The tunnel excavation construction method comprises the following steps: performing excavation construction on a constructed tunnel in a mode of multiple segments in the longitudinal extension direction from back to front; when excavation construction on any one of thesegments is carried out, the steps are as follows: 1, determining basic mechanical parameters of the surrounding rocks; 2, performing zonal fracturing evolution analysis on the surrounding rocks; 3,performing pre-grouting reinforcement judgement on the tunnel; 4, performing pre-grouting reinforcement on the tunnel; 5, performing excavation construction on the tunnel; 6, performing excavation construction on the next segment; 7, repeatedly carrying out the step 6 until the whole excavation construction process of the constructed tunnel is completed. The tunnel excavation construction method disclosed by the invention has the advantages of simple steps, reasonable design, convenience in realization and good use effect; before the tunnel is excavated, the zonal fracturing evolution analysisof the surrounding rocks is carried out, and according to a zonal fracturing evolution analysis result of the surrounding rocks, pre-grouting reinforcement is carried out purposely, and the stabilityof the surrounding rocks of the tunnel and the security of the tunnel can be effectively ensured.

The present invention relates to a suspended side-hung door electric door-opener for house side-hung door. Because a height and position optimized revolution fulcrum is set on the wall the length of arm of force for opening and closing the door is reasonable, and so it the driving length of the driving component so as to obtain the wider usable space. All the mechanism components are arranged between fulcrum on the wall and fulcrum on the door and assembled into one whole body in the suspended mode, so that said product is compact in structure, small in volume and convenient for mounting, said whole body comprises electric driven, bolt driving mechanism triangle component door-locking mechanism, elastic safety mechanism, on-wall support revolution fulcrum and on-door supporting bar.

A fly line leader made from a single length of monofilament line that is folded upon itself to provide at least four strand portions that are twisted together. The leader has a loop at each of opposite ends thereof provided by the single length of monofilament line with the result of no enlargement at the transition from the main portion of the leader to the loop. The monofilament line preferably is nylon with a cross-sectional diameter in the range of 0.1 mm to 0.5 mm. A simple twister mechanism is described whereby the fisherman can make his own leader matched to his own preferences by selection of line stiffness, line diameter, and degree of twisting.

The invention discloses a thrombectomy stent with barbs for enhancing capture force. The thrombectomy stent comprises a mesh cage formed by an elastic wire mesh in a curly shape; the elastic wire meshcomprises a plurality of elastic wires; the elastic wires intersect with one another to form a plurality of grid units; the formed grid units include a plurality of 8-shaped grid units; an inward circuitous part is arranged in the middle of each of two sides of each 8-shaped grid unit in the width direction; the inward circuitous part of at least one 8-shaped grid unit extends to form an extension wire; the two extension wires are intersected to form a capture unit; and the tail end of the capture unit can be provided with a developing point/developing block by welding. The invention aims toprovide the thrombectomy stent with the barbs for enhancing the capture force, which is used for more reasonably enhancing the capture effect on thrombus, and can enhance the supporting strength for preventing the mesh cage from prematurely collapsing and deforming due to bending force.

The invention provides a tire conveying system, which relates to the technical field of sequenced tire conveyance of a tire assembly split charging line. The tire conveying system comprises a first platform, a conveying device, and a second platform, wherein the conveying device is connected with the output end of the first platform, the second platform is connected with the output end of the conveying device, one end, near the first platform, of the conveying device is lower than one end near the second platform, an included angle between the conveying device and the horizontal plane is 5 degrees, a plurality of lines of universal rolling balls are respectively distributed on the top surfaces of the first platform and the second platform, the second platform comprises a butt joint turning plate, the butt joint turning plate is hinged to the output end of the second platform, a manual operation room is arranged at one side of the output end of the second platform, and the conveying device is driven through a variable-frequency motor. The tire conveying system has the advantages that the conveying device is in inclined arrangement, the angle and the length are more reasonable, and the conveyance of tires is stable and safe.

The invention relates to a non-parallel line type card sample quasi-line point solving method. The method comprises the following steps: S1: making a head vertical line through a head card sample line type, and making a tail vertical line through a tail card sample line type; S2: intercepting a set length on the head vertical line to create a head card sample rod corresponding to the head card sample line type, and intercepting a set length on the tail vertical line with the intersection point of the tail card sample line type and the tail vertical line as a starting point to create a tail card sample rod corresponding to the tail card sample line type; S3: connecting a head alignment point and a tail alignment point to generate a connecting line segment, and simultaneously extending the head card sample rod and the tail card sample rod and intersecting at a point O; S4: equally dividing the connecting line segments according to the number of the residual card sample line types between the head card sample line type and the tail card sample line type, and creating equal division points with equal number; and S5: creating a sample card rod corresponding to the residual card sample line type. The non-parallel line type card sample quasi-line point solving method provides a method for calculating the card sample quasi-line points specially aiming at the non-parallel lines, so that the calculation process of the non-parallel lines is more reasonable.

The embodiment of the invention provides a power supply cable type selection method and device, electronic equipment and a storage medium, and the method comprises the steps of obtaining a base station connection topological graph, and marking the length and current-carrying capacity of a to-be-selected power supply cable between each far-end power supply node and a previous power supply node in the base station connection topological graph; for a to-be-selected power supply cable between each far-end power supply node and a previous power supply node, determining a performance element corresponding to the to-be-selected power supply cable; based on the current-carrying capacity of the to-be-selected power supply cable, screening a target power supply cable from the candidate power supply cables, and determining a cable element corresponding to the target power supply cable; predicting voltage loss generated by the target power supply cable based on the performance element, the cable element and the length of the to-be-selected power supply cable; and under the condition that the voltage loss meets a voltage loss constraint condition, determining the to-be-selected power supply cable as a target power supply cable.

The swimming apparatus pertains to swimming with special equipment for swimmers and divers and can be used for increasing speed, comfortable maneuvering, and making swimming more economical. The swimming apparatus comprises a tail fin, a hand-held fin and a dual snorkel.

The invention discloses a loess tunnel micro-step construction method, and relates to the technical field of tunnel construction. The loess tunnel micro-step construction method comprises the following steps that forepoling of an upper step is carried out; the upper step is excavated for drossing; a middle step is excavated for drossing; the upper and middle steps are sprayed with C25 concrete forthe first time; grille steel frames are erected on the upper and middle steps, and the lower step is excavated at the same time; the upper and middle steps are sprayed with concrete for the second time, and grille steel frames are erected on the lower step; the lower step is sprayed with concrete; excavation supporting of an inverted arch is carried out, and alternating cycle operation of micro-step excavation is maintained in sequence; the excavation supporting of the inverted arch is carried out for secondary lining; a advance long pipe-shed is used as the forepoling of the upper step in the tunnel entrance section; advance short pipe-shed is used as the forepoling for the upper step in the weak surrounding rock section of a hole body; and advanced small pipes are used as forepolings ofthe upper step in the IV class, V class, and VI class surrounding rock sections. According to the loess tunnel micro-step construction method, of the operating space is used fully, the utilization rate of personnel equipment is enhanced, the construction safety is ensured, the working efficiency is improved, and the construction progress is speeded up.