1627results about How to "Guaranteed installation accuracy" patented technology

The invention discloses an experiment table for detecting dynamic characteristics of harmonic reducers, which comprises an X guide rail arranged on a bottom plate, as well as a first servo motor, wherein the first servo motor is fixed on the X guide rail and is axially connected with a follow-up harmonic reducer; the follow-up harmonic reducer is fixed on the X guide rail and is axially connected with a first torque sensor through a first torsion bar; the first torsion bar sensor is axially connected with a first angle measuring device; the first angle measuring device is connected with a first connecting shaft; and a detected harmonic reducer is arranged on the X guide rail through a mounting bracket and a positioning piece. The experiment table is characterized in that a Y guide rail perpendicular to the X guide rail is arranged on the bottom plate; when the detected harmonic reducer is a right-angled reducer, a second angle measuring device is arranged on the Y guide rail and is axially connected with a second torque sensor; and the second torque sensor is axially connected with a second servo motor. The experiment table has the advantages of good universality and capability of completing the task of testing the dynamic characteristics of a plurality of detected harmonic reducers on one experimental device.

The invention discloses an installation method of prestressed concrete stiffened box girder for an earth-anchored suspension bridge, relating to an installation method of stiffened box girder for suspension bridge. The installation procedure is that: symmetrically pushing from the segment at mid-span to the main towers at the two sides or pushing from the segment near the main towers to the mid-span and the abutments, the steps are that: the concrete structure stiffened box girder is erected by hoisting, lifting or oscillating-shifting method, the erection of the concrete structure stiffened box girder comprises the pre-assembly of the stiffened girder, the installation of cable clamp and suspender cable, the slung load of catwalks, carrying the stiffened girder to the construction site, the girder erection crane at the position, hoisting, floating and positioning, moving the stiffened girder to the hoisting point and raising perpendicularly, connecting with the segment by drawing off, after the stiffened girder in position, adjusting the alignment of the beam segment, completing the temporary connecting installation between the beam segments, penetrating the longitudinal prestressed steel strands, loading the top surface of the beam blocks, wet connection between the segments, incrementally launching the cable saddle on the top of the tower, locking the cable saddle. The installation method of prestressed concrete stiffened box girder for an earth-anchored suspension bridge has the advantages of ensuring the installation precision and good alignment of the bridge.

The invention provides a method for installing an overhead steel structure high, which belongs to a method for constructing a fixed structure. The prior installation method has defects that precise positioning is hard to realize and installation precision is hard to guarantee. The method comprises the following steps of: accurately modeling and correctly lofting and cutting, correctly paying off and accurately positioning; installing embedded parts, a temporary assembly jig and an upright post according to the paying-off position; positioning and fixing a joint on the temporary assembly jig; orderly lifting a main girder, a secondary girder and a purline; and unloading and dismounting the temporary assembly jig. The method is easy to guarantee manufacture precision of each component and installation precisions of the embedded parts, the temporary assembly jig, and the joint; the on-site lofting and cutting is unnecessary to undergo, and the on-site lifting and connection (welding) of each component are convenient.

The invention discloses a high precision welding method for a rudder horn, a propeller shaft bracket and an intermediate shaft bracket of a long shaft ship, belonging to the field of ship welding. In the high precision welding method, a shaft center line of the ship is firstly pulled out according to design requirements when the ship is assembled and installed; after the shaft center line is examined, the following three steps are synchronously carried out: firstly, welding of the rudder horn; secondly, the welding of the propeller shaft bracket; and thirdly, the welding of the intermediate shaft bracket. Compared with the prior art, because installation phases of the propeller shaft bracket and the intermediate shaft bracket are advanced to the assembling phase, the construction condition is improved, and the installation precision is ensured; and because the complete cross section of a ship body is horizontally assembled (the complete cross section is the propeller shaft bracket which is reversely placed, and the intermediate shaft bracket is over the intermediate shaft bracket), the installation position can be adjusted by fully utilizing a crane when the ship body is installed, the working efficiency is improved, and the utilization time of a dock is greatly reduced.

The invention provides a method for manufacturing a superlarge spherical seal head, which comprises the steps of: providing a first group of steel plates to form a first ring part of a spherical seal head, wherein the closed end of the spherical seal head is formed by the first ring part; providing at least one group of steel plates to form at least one middle ring part of the spherical seal head; and providing the last group of steel plates to form an outmost ring part of the spherical seal head, wherein the open end of the spherical seal head is formed by the outmost ring part. Corresponding steel plates of adjacent groups and adjacent steel plates of each group of steel plates are finally interconnected through welding. A sectional forming method is applied to the spherical seal head, the seal head is formed step by step through deformation of each area, and larger deformation is dispersed and localized, therefore, the deformation of each area can be even to effectively avoid defects, such as crinkles and the like.

A drive traveling mechanism of a peristaltic pipeline robot mainly solves the problem that existing pipeline internal drive travelling mechanism are lower in driving force and hard to drive robots to run for long distance in pipelines. The drive traveling mechanism of the peristaltic pipeline robot is characterized in that the drive traveling mechanism consists of two crank-and-rocker mechanisms and a worm-and-gear mechanism which share a robot body as a framework, a connecting rod of one crank-and-rocker mechanism is of an elastic connecting rod structure, and the elastic connecting rod penetrates through a rocker which swings around the robot body to be further connected with a gear rotating around the robot body so as to form one crank-and-rocker mechanism. The two crank-and-rocker mechanisms identical in structure are respectively arranged from front to back. When a motor drives the worm to drive the gear to rotate, traveling legs connected to the two crank-and-rocker mechanisms arranged from front to back realize translational motion. The two crank-and-rocker mechanisms serving as components of the drive traveling mechanism are distributed along the radial direction of the worm by 120 degrees and are driven by the same worm. The drive traveling mechanism has the advantages that traveling legs can contact with walls of pipelines sufficiently to generate higher dragging force so that the robot can travel by a long distance in the pipelines.

The invention discloses a construction method for pouring and forming an urban viaduct curve type pier stud in a one-off mode. The construction method includes the following steps of 1 positioning pier stud pre-buried main reinforcement, 2 chiseling the combined portion of a pier body and a pile cap, 3 staking out in survey, 4 putting up a scaffold, 5 machining and installing reinforcement, 6 machining and installing a formwork, 7 pouring concrete, 8 disassembling the formwork and curing, and 9 removing the scaffold. According to the construction method for pouring and forming the urban viaduct curve type pier stud in the one-off mode, the pier stud has the advantages of being fast to construct, reasonable in structure, economical, practical and the like and is widely applicable to an urban high-pier bridge, particularly an urban high-pier landscape bridge.

The invention relates to installation project construction of a vaporization-cooling chimney of a large converter, in particular to ground assembling and welding integral installation and construction technology for the vaporization-cooling chimney. The technology comprises the following steps: laying a steel platform and making a chimney support by using steel plates; transporting a cooling chimney to an installation site by using a large-tonnage flat truck; assembling the cooling chimney by using a large-tonnage crane; performing all-position ground welding on the vaporization-cooling chimney by adopting argon tungsten arc welding; performing 25 percent of radiographic detection and a corresponding airtight test on the welded chimney according to construction specifications; hoisting the chimney integrally; and fixing chimney system equipment according to the following sequence: curved chimney, cooling chimney and movable chimney so as to complete the installation of the chimney. The technology ensures the welding quality of the vaporization-cooling chimney, reduces the workload of overhead construction, reduces potential safety hazard during the construction, greatly improves the working efficiency of the installation of the vaporization-cooling chimney, reduces the duration of the construction, and increases the service life of the vaporization-cooling chimney.

An oval single-tube two-way vacuum pipeline traffic system comprises an oval pipeline. The oval pipeline is internally provided with a two-way travelling vehicle, vehicle upward suspension magnetic poles are arranged on the two sides of the travelling vehicle and matched with an outer suspension track and an inner suspension track correspondingly, and the outer suspension track is connected to theinner wall of the oval pipeline. The inner suspension track is supported on the inner wall of the oval pipeline through a track first support. A support rod is arranged at the position of a short shaft of the oval section of the oval pipeline, a semi-oval groove-shaped support seat is arranged along the exterior of the oval pipeline, and tight-pushing clamps are arranged on the position, on the horizontal positions of the two sides of the exterior of the pipeline, of the upper portion of the groove-shaped support seat along the long axis of the section of the oval pipeline. Adjusting and fixing are conducted through adjusting bolts. As for a vehicle with the same section, the blockage ratio in two-way double pipelines is slightly decreased, and the train travelling pneumatic resistance isreduced; and pipeline manufacturing materials are reduced, the pipeline erecting work procedure is reduced, the cost is reduced, the effective clearance in the pipeline is greatly increased, and mounting, examining and maintaining are conveniently facilitated.

The invention provides an automatic plug-in machine. The automatic plug-in machine comprises a machine seat and a printed circuit board (PCB) transmission device, a mechanical arm, a first charge coupled device (CCD) recognition device and a component feeding mechanism which are arranged on the machine seat, the first CCD recognition device is used for pin recognition of an electronic component, the mechanical arm comprises a fixed end and a free end, the fixed end is used for installing and fixing, the free end is used for acquiring the component and a plug-in, a transmission mechanism is arranged between the free end and the fixed end, a component fixture and a second CCD recognition device are arranged at the free end of the mechanical arm, and the second CCD recognition device is used for recognizing and positioning a PCB. The automatic plug-in machine provided by the invention can be suitably used for automatic plug-in operation of a large amount of electronic components, manual labor is completely substituted, and the production cost is saved; and with the dual and automatic compensation of the component and PCB, the installation accuracy is high, and the reject ratio is reduced.

The invention discloses a method for integrally fixing and installing foundation bolts with large diameter, which comprises the following steps of: (1), manufacturing a supporting steel plate in a partition way; (2), determining the central positions of bolt positioning holes on the supporting steel plate; (3), processing the bolt positioning holes on the partitions of the supporting steel plate; (4), installing an upright post and a transverse beam of a fixing rack in situ; (5), splicing the partitions of the supporting steel plate on the transverse beam of the fixing rack, fixing the partitions of the supporting steel plate with the transverse beam of the fixing rack after regulating to enable the positions of the bolt positioning holes on the partitions of the supporting steel plate to be consistent with the design positions of bolts, and welding all the partitions of the supporting steel plate into a whole; (6), installing the bolts in a hung way, enabling the bolts to penetrate through the positioning holes from the lower part of the supporting steel plate, installing nuts on the bolts and centring the elevations of the bolts by utilizing the nuts; and (7), after centring the elevations of all the bolts completely, fixing the bolts with the fixing rack by knot pulling bars and welding the fixing rack firmly. The bottoms of the bolts are fastened by one-time regulation and centring so as to complete the integral fixation and installation of the bolts, and the invention has high efficiency and low cost.

The invention provides an integrated mounting bracket for star sensors. The mounting bracket comprises a mounting bottom plate, an overall support platform, a plurality of support barrels and mounting flanges, wherein the mounting bottom plate is fixedly connected with a satellite platform; the overall support platform is fixedly connected with the mounting bottom plate; the plurality of support barrels are connected with the overall support platform respectively; the mounting flanges are arranged at the top ends of the support tubes and used for mounting the star sensors. According to the integrated mounting bracket for the star sensors, integrated mounting of three star sensors is realized according to a satellite attitude and orbit control subsystem scheme and the mounting requirements of the star sensors, and conditions of non-uniform bracket forms, complicated design and processing procedures and longer period occurring when the star sensors are separately mounted are avoided.

The invention relates to a lead-connecting device in a power system. The device comprises a hydraulic press binding clip and a hydraulic system matched with the same and is characterized in that a guide rail is fixed on a worktable, a trolley which can move along the guide rail and is provided with the hydraulic press binding clip is mounted on the guide rail, the hydraulic press binding clip is fixed on a fixed plate on the trolley, a lifting device and a guiding device for moving the fixed plate up and down are mounted between the fixed plate and the trolley, a fixed frame is mounted on the worktable at one end of the trolley and provided with a lead-clamping device, a lead-clamping trolley which can move along the guide rail is mounted on a guide rail at the other end of the trolley and is provided with a lead-clamping device, and the lifting device, the guiding device and a tension device which pulls the lead-clamping trolley to move along the guide rail are mounted on the lead-clamping trolley. The invention has the advantages of reasonable structure, convenient use and high working efficiency and lead-connecting quality.

The invention discloses a fixing device and a fixing method for a prism of corner cube. The fixing device comprises a clamp, an apron, a base, a lock nut and a holding screw. A hollow hole with a circum-circle diameter less than a bottom diameter of the prism of corner cube is arranged in the clamp and is used for placing the prism of corner cube. A hollow hole with an opening containing inner screw threads is arranged in the base and is used for placing the prism of corner cube and the clamp. The inner hole diameter of the lock nut is slightly less than the circum-circle diameter at the bottom of the prism of corner cube. The gap between the whole length of the hollow hole of the base and the length of the assembled prism of corner cube and clamp is less than the inner screw thread length of the base. The lock nut matches with the base through the inner and exterior screw threads and tightly locks the prism of corner cube in axial direction. The holding screw is screwed in the screw holes in the exterior wall of the base to tightly hold the clamp and prevent the clamp from rotating in the axial direction. The fixing device and a fixing method fully make use of the three orthogonal seamed edges of the prism of corner cube, adopts the three contact styles containing point contact, line contact and surface contact to realize the precisely-fixed prism of corner cube, and has the advantages of simple structure, convenient installation and detachable installation.

The invention relates to a construction method and a special transport and installation ship for the marine transport and installation of a wind-driven generator. The special transport and installation ship adopted in the construction method comprises a ship body, wherein the stem of the ship body is provided with an installation system and a ship body stem overlapping device; the installation system comprises an installation platform, a mounting bracket arranged on the installation platform and a jacking and fine tuning device, and the mounting bracket used for fixing the wind-driven generator in transport and installation processes; and the jacking and fine tuning device is used for positioning the wind-driven generator. According to the invention, the transport and installation ship isadopted to perform installation and integrates the functions of the marine transport and installation of the whole wind-driven generator, thus the marine transport and installation of the whole wind-driven generator can be directly performed without influences caused by wind waves; and a special transport ship is not required to be used for transporting the wind-driven generator to an installation site, and a marine platform or a giant hoisting machine on a special crane ship is not required to be used for installation thus the construction and use cost is low.

A refrigerating machine jacket structure for a superconduction magnet and an installation and disassembly method of the refrigerating machine jacket structure relate to the technical field of low-temperature engineering and superconduction magnets. The refrigerating machine jacket structure sequentially comprises a refrigerating machine flange seat (3), a primary corrugated pipe (11), a primary flange seat (12), a secondary corrugated pipe (21) and a secondary flange seat (22) from top to bottom, wherein thermal connection is formed between a cold screen and the primary flange seat 12), thermal connection is formed between a superconduction coil and the secondary flange seat (22), the refrigerating machine flange seat (3) and the primary flange seat (12) are connected by the primary corrugated pipe (11), and the primary flange seat (12) and the secondary flange seat (22) are connected by the secondary corrugated pipe (21). The refrigerating machine jacket structure has the characteristics of low conduction thermal leakage, high vacuum tightness, high thermal connection efficiency and long lifetime of a refrigerating machine.

The invention discloses a tensioning and positioning round pin, which is provided with at least two pin flaps separated from each other, wherein when the pin flaps of the tensioning pin are folded, the tensioning pin contracts, so that the tensioning pin can easily extend into a positioning hole; and then, the tensioning pin is tightly combined with the positioning hole by unfolding the pin flapsof the tensioning pin, so that no gap exists between the tensioning pin and the positioning pin, the positioning accuracy and stability of a clamp are ensured, the installation accuracy of fittings such as a vehicle door hinge and the like is ensured, one-time installation success rate of a vehicle door is increased, the production efficiency is improved and the fluctuation of product quality is reduced. The invention also discloses a round pin-inserted positioning device. The round pin-inserted positioning device comprises the tensioning and positioning round pin provided with at least two pin flaps which are separated from each other, and an expansion device which is fixedly connected with the root parts of the pin flaps and drive the pin flaps to move along the radial direction. By adopting the round pin-inserted positioning device, the installation accuracy of the vehicle door hinge can be enhanced and the one-time installation success rate of the vehicle door can be increased.

The invention discloses a method for processing a large combination type herringbone gear, which comprises the following steps of: forging; carrying out rough processing of the end surface, an incircle and an excircle on a processed workpiece by utilizing a lathe; drilling a hoisting hole; carrying out rough gear hobbing on the workpiece by utilizing a gear hobbing machine; carrying out tempering processing on a gear; semifinishing an inner hole, the end surface and an addendum circle by utilizing the lathe; drawing any pair of end surface gear central lines based on the end surface of one side of a reference groove, making a reference groove mark on an addendum and drawing a position line of each hole; drawing and drilling each hole by using a drilling machine; finishing and lathing the inner hole and both end surfaces of the lathe to a preset size; positioning based on a reference surface, carrying out correcting gear grinding on the addendum circle ; chambering, drilling and articulating each hole on a gear ring; and screwing a bolt and hinging the bolt and combining two gears into a pair. The invention has the advantages of material saving, cost reduction and mechanical performance improvement of products.

The invention discloses a construction method of a low-clearance swing bridge across an operational line. The construction method comprises the steps of preparing for swing, installing and constructing a swing structure by virtue of the techniques of step-by-step installation and multiple pouring, performing beam body construction, performing a balance weighing test and trial swing construction, allowing formal swing to be in place, and using a steel shell method to perform the construction of an ultra-low-clearance closure segment. The construction method of the low-clearance swing bridge across the operational line adopts a spherical hinge multistep installation precise control technique, a balance weighing test pre-weighting technique, a swing parameter correction and precise positioning technique and a closure segment ultra-low-clearance steel shell construction technique to meet specifications, precision of design drawings and quality requirements, and leads the way in swing spherical hinge installation precision, swing balance stability and precision control. The construction method solves the difficult problem of insufficient clearance under the bottom of the bridge, and ensures the safety of the operational line.