988 results about "Traveling block" patented technology

The invention discloses a device and a method for a low-speed wind tunnel gust or flutter half-mode test, belongs to the field of wind tunnel tests, and aims to solve the problems that an existing gust or flutter half-mode test device cannot realize complete release of heaving and pitching degrees of freedom and is difficult to share the two tests. The device comprises an overall frame, the overall frame is installed in a wind tunnel test section, two sliding rails are vertically arranged on the front end face of the overall frame, two sliding block sets are arranged on the left side and the right side of the rear end face of a tackle, the two sliding block sets are in sliding fit with the two sliding rails in a one-to-one correspondence mode, two spring seats are arranged at the top end of the overall frame, and horizontal shafts are arranged on the spring seats. The inner ring ends of the two clockwork springs are connected with the horizontal shafts of the two spring seats in a one-to-one correspondence manner, the outer ring ends of the two clockwork springs respectively droop to be connected with the pulley, and the model mounting seat is cylindrical and is in running fit with the pulley; the device can be used for a gust load retarding test and a body degree of freedom flutter test, and can be shared by the two tests.

The utility model discloses a lifting row with adjustable lifting point spacing, which relates to the technical field of lifting appliances and comprises a beam body and at least one lifting pulley block, upper lifting points are arranged at two ends of the beam body, the lifting pulley block comprises a plurality of transverse shafts which are transversely and detachably connected onto the beam body, and two ends of a third transverse shaft at the edge position are connected with two rope heads of a steel wire rope. Two fixed pulleys I in the direction of the first plane are arranged below the transverse shaft I at the other edge, fixed pulleys II are arranged at the two ends of the transverse shaft II in the middle, and the fixed pulleys II on the front side of the beam body and the fixed pulleys II on the rear side of the beam body are located on two parallel planes and are perpendicular to the first plane; the steel wire rope is sequentially connected with the second fixed pulleys and the two first fixed pulleys in series, a pulley is hung below the steel wire rope between every two adjacent second fixed pulleys in the same plane, and the distance between the pulleys can be changed by changing the position of the transverse shaft. According to the lifting row, a certain pair of lifting points can be independently adjusted, the operation is convenient and fast, and the stress of the whole group of lifting points is still balanced after the distance between the lifting points is changed.

The invention discloses a flexible gallery type crossing pay-off system with an automatic opening and closing tackle, which comprises a traction walking board, a main frame body, a pay-off tackle and a wire pressing tackle, the pay-off tackle is mounted at the lower end of the main frame body, the wire pressing tackle is elastically, vertically and slidably mounted at the upper end of the main frame body, and a clamping area is formed between the wire pressing tackle and the pay-off tackle; when the traction walking plate is matched with the clamping area, the wire pressing tackle is suitable for being driven by the traction walking plate to slide and be far away from the paying-off tackle; when the traction walking board crosses the clamping area, the wire pressing tackle is suitable for moving downwards under the action of gravity and elastic force and getting close to the wire paying-off tackle, and then the drawn wire is located in the closed clamping area. The wire pressing tackle has the advantages that the phenomena of wire jumping and groove jumping of a traction rope and a wire before and after paying off can be prevented, the clamping area can be automatically opened and closed under the action of the traction walking plate, in other words, manual interference operation on the wire pressing tackle is not needed in the whole process, manpower is saved, and working efficiency is improved.

The invention belongs to the technical field of slope construction, and particularly relates to slope reinforcing construction equipment which comprises a movable base and a drilling machine mechanism, a mounting platform is hinged to the movable base, a transverse sliding rail is machined on the mounting platform, the transverse sliding rail is connected with a tackle, and a tackle driving mechanism is mounted on the mounting platform. The drilling machine mechanism comprises a first motor, a drilling rod, a connecting assembly and a reciprocating driving assembly, the first motor is provided with a sleeve, the connecting assembly comprises a sleeve rod, a sliding plate and a bearing, the sleeve is provided with a first transverse positioning groove, and the sleeve rod is provided with a first positioning sliding block; the tackle is provided with a plurality of transverse positioning rods, the sleeve rod is fixed to the drill rod, and the reciprocating driving assembly is installed at the bottom of the tackle. When the equipment disclosed by the invention is used for drilling construction operation, the drill rod not only can rotate, but also can do transverse reciprocating motion, and the reciprocating motion of the drill rod can further impact and crush underground hard rocks in a reciprocating manner.

An energy absorption device for absorbing at least a portion of impact energy occurring in an impact of an impact body in a safety net construction includes at least one cable guiding unit forming at least one cable receiving region for receiving and / or guiding at least one cable, and further includes at least one energy absorption element, arranged in the cable receiving region and forming at least one friction surface for the guided cable, the energy absorption element being configured, if a force inducing movement of the cable across the friction surface is exerted on the cable, to selectively absorb at least a portion of energy the force created via substantial deformation and / or abrasion of the friction surface. A cable brake, particularly a block-and-tackle cable brake, includes an energy absorption element of the energy absorption device, which is arranged at the deflection element on a side facing toward the cable.

The invention relates to the technical field of power transmission facility construction, in particular to a wire clamping prevention pay-off device suitable for power transmission line stringing construction. The device comprises a tension traction device, a paying-off tackle and a lead device, the paying-off tackle comprises a bearing pulley and an anti-pinch device, and the anti-pinch device comprises a telescopic stop lever. The tension traction device is used for guiding a wire to be erected on the paying-off tackle from a wire roll, the paying-off tackle is used for guiding the wire to be conveyed and finally fixing and hanging the wire, the wire leading device is used for pulling the wire to be dragged in the paying-off tackle, and the bearing pulley is beneficial to reducing friction force during wire conveying and facilitating movement of the wire under the action of the wire leading device. The anti-pinch device is used for preventing the lead from sliding into the gap of the bearing pulley and reducing wire clamping and winding, the telescopic stop lever is used for preventing the lead from deviating, the stop lever spring controls the telescopic stop lever to stretch out and draw back and be tightly attached to the bearing pulley, and gaps caused by deformation of the bearing pulley are avoided.

The invention discloses a cage cable-based FAST cable-driven pulley high-altitude inspection and maintenance device, and the device is characterized in that a FAST telescope comprises a plurality of process systems, such as an active reflection surface system and a feed source supporting system; in the feed source supporting system, six steel cables are led out from six supporting towers to pull and control a feed source cabin to move on a focal plane, a plurality of pulleys used for hanging cables and optical cables are arranged on each steel cable in cooperation with astronomical observation, and the inspection and maintenance device comprises a cableway, a cable crane, a cableway hanging basket and a lifting pulley platform. The cableway is erected between the cable crane and the lifting pulley platform, and transverse movement of the cableway is achieved through walking of the cable crane. The cableway hanging basket is used for moving between the upper anchoring end and the lower anchoring end along the cableway to be close to the position of the cable driving tackle needing to be inspected and maintained, and then the cableway hanging basket is controlled by carrying maintenance personnel to vertically ascend and descend or arrives at the position of the tackle needing to be inspected and maintained along the cableway ascending / descending mechanism for inspection and maintenance.

The invention discloses a disassembly-free top drive drilling device pulley and guide rail system, relates to the field of petroleum drilling engineering, and solves the problems that a top drive drilling device is too long in assembly and disassembly time and too high in safety risk when applied to a telescopic derrick drilling machine. The derrick is divided into an upper derrick section and a lower derrick section; the slide rail comprises an upper slide rail section and a lower slide rail section; the upper-section sliding rail and the lower-section sliding rail are hooked through a hook; an upper-section sliding rail and a lower-section sliding rail are respectively arranged on two sides of the inner sides of the derrick upper section and the derrick lower section; two ends of the pulley are in contact with the upper-section slide rail and the lower-section slide rail; the working surfaces of the upper-section sliding rail and the lower-section sliding rail in contact with the tackle are on the same plane to form a tackle guide channel; the middle of the pulley is connected with a top drive; the top drive is hung below the traveling block and moves up and down along with the traveling block. According to the disassembly-free top drive well drilling device pulley and guide rail system, the assembly and disassembly time is saved, the danger in the assembly and disassembly process is reduced, and the well drilling efficiency and the construction quality are improved.

The invention discloses electric-drive automatic workover operation equipment for a vertical derrick. The electric-drive automatic workover operation equipment comprises a self-propelled chassis, the vertical self-balancing derrick, a traveling block guide rail, a traveling block, an electric winch, a wellhead automatic platform and a hydraulic pipe conveying machine. The self-propelled chassis is installed at the bottom of the main vehicle and provided with four stepping supporting legs, and a stepping device is arranged below each stepping supporting leg. A balance beam type crown block is mounted at the top end of the upright self-balancing derrick; the traveling block guide rail is arranged along the front side of the upright self-balancing derrick; the traveling block moves up and down along the traveling block guide rail; the wellhead automatic platform is integrated with a hydraulic clamp, a righting manipulator and an automatic hoop finder; the hydraulic pipe conveying machine adopts a horizontal-to-vertical bidirectional lifting mechanism, the vertical self-balancing derrick is configured, a loaded crown block is small in offset, the derrick is configured with a traveling block guide rail, a traveling block moves along with the guide rail and is small in wind load drift, the wellhead pipe column handover processing efficiency is high, and the time for a traveling crane system of the workover rig to participate in pipe column handover is shorter; and the overall efficiency of the automatic tubular column processing operation of the workover rig is improved.

The invention belongs to the technical field of petroleum drilling machine equipment, and discloses a petroleum drilling machine stepping type translation device and a translation method.The petroleum drilling machine stepping type translation device comprises a mounting frame connected with a drilling machine base, a jacking oil cylinder is connected to the bottom of the mounting frame, the end of a cylinder rod of the jacking oil cylinder is connected with a rotating device, and a sliding device is connected to the lower portion of the rotating device; the installation frame is connected with a drilling machine base through a plurality of sets of pin shafts I, the bottom of the installation frame is connected with the jacking oil cylinder through bolts, the end of a cylinder rod of the jacking oil cylinder is of a threaded structure and is connected to a rotary support of the rotating device, a rotary flange on the rotating device is fixed to a sliding frame of the sliding device through bolts, and a roller chain pulley is arranged in the sliding frame. The bottom of the roller chain pulley is attached to the sliding shoe. Stepping oil cylinders are hinged to the two sides of the sliding frame respectively, the stepping oil cylinders are double-outlet-rod oil cylinders, and the two cylinder rod ends of the stepping oil cylinders are hinged to lug seats on the two sides of the sliding shoes through pin shafts II respectively; the drilling machine can quickly move back and forth or rotate in situ.

The suspended top type releasing and recycling device for the ocean robot comprises a frame body, a first sliding rail device is fixedly connected to the top of the frame body, the first sliding rail device is sequentially and slidably connected with a first mounting frame, a second mounting frame and a traveling block device, the first mounting frame is provided with a first rope guide wheel, and the second mounting frame is provided with a second rope guide wheel; the traveling block device is provided with a third rope guide wheel, a swing stopper and a submarine cable manager; a third sliding rail device is vertically arranged at the bottom of the frame body, and a second sliding rail device is vertically arranged on the second mounting frame close to the traveling block device; the cable storage winch, the friction traction winch, the first rope guide wheel, the second rope guide wheel, the third rope guide wheel, the oscillation stopping device and the submarine cable manager are rotationally connected in sequence through an umbilical cable. According to the suspended top type releasing and recycling device for the ocean robot, the underwater robot is moved to the position close to the water surface or below the water surface by arranging the horizontal track and the vertical track, and the problem of safe releasing and recycling of an ultra-deep water working-stage robot in a limited cabin space is solved.

The invention is suitable for the technical field of traveling block hook testing, and provides a testing device for a traveling block hook and a testing method thereof.The testing device comprises a mounting assembly used for providing rigid support for the whole device and a testing assembly arranged on the mounting assembly, the test assembly is used for applying a simulation load to the hook assembly of the traveling block, the detection assembly is arranged on the mounting assembly and is used for carrying out image acquisition on the hook assembly of the traveling block, and the test assembly comprises a clamping unit and a load simulation unit which are oppositely arranged from top to bottom. The clamping unit comprises a suspension oil cylinder, a first hinge structure and a fixing seat, the load simulation unit comprises a load oil cylinder and a second hinge structure, a friction effect equivalent load is introduced through an equivalent load model, the defect that the friction force of a drilling tool is neglected in an existing test is overcome, the test load better fits the actual drilling working condition, and the test efficiency is improved. The accuracy of a detection result is improved.

The invention belongs to the field of electric power facility maintenance equipment, and particularly relates to an automatic pulley capable of passing through a barrier of double split conductors, which comprises a support, a pulley, a pulley block, a pulley block and a pulley block, and is characterized in that the support comprises four vertical rods which are symmetrically arranged; the number of the walking assemblies is four, the walking assemblies are arranged above the vertical rods, each walking assembly comprises a cross-shaped rod, L-shaped plates are fixed to the four ends of each cross-shaped rod, U-shaped grooves are formed between the L-shaped plates and the cross-shaped rods, rolling wheels are arranged in the U-shaped grooves, and center shafts are fixed to the sides, away from the cross-shaped rods, of the rolling wheels; and a first belt wheel is arranged on the central shaft. Obstacle crossing is achieved in the mode that the cross-shaped rod drives the rolling wheels to turn over, through the height compensation assembly, in the obstacle crossing process, the fluctuation degree of the support is reduced, support jolt is relieved, and the extending length of the electric push rod is flexibly changed by detecting the sag angle of the bearing cable through the total station; the friction force between the roller and the load-bearing cable is flexibly changed according to the sag angle of the load-bearing cable.

The present invention discloses a pulley that is easy to disassemble and assemble, which includes a hook assembly, a locking assembly and a buckle assembly, wherein the hook assembly includes a left side wall, a right side wall, and a hook arranged between the left side wall and the right side wall; the locking assembly is arranged in the left side wall, including a locking cavity, a limiting buckle arranged in the locking cavity, and a spring connected to the limiting buckle; and the buckle assembly is connected to the locking assembly, including a locking rod and a locking ring sleeved on the locking rod; the hook (103) is sleeved on the outside of the locking rod; the radial diameter of the inner wall of the locking cavity is the same as the radial diameter of the locking rod, and a limiting cavity is further provided on the inner wall of the locking cavity; the easy-to-disassemble and assemble pulley of the present invention can conveniently disassemble, replace and reassemble the hook, so that the pulley can meet more diverse usage requirements, and the sleeve rod can be disassembled and assembled by simply pushing, which is easy to operate, has lower learning cost, is suitable for the structure of most pulleys, and has a wide range of applications.

A tackle special for a top drive device comprises a vertical rail A and a vertical rail B. The vertical rail A and the vertical rail B are connected with each other, and relates to the field of oil exploration, a sliding device is arranged on the vertical rail A, the vertical rail A and the vertical rail B are in sliding connection, the sliding device and the top drive device are connected, the sliding device and the top drive device are fixedly connected, and the sliding device comprises a vertical frame and a transverse frame. The left end and the right end of the transverse frame are each connected with a set of vertical frames, the vertical frames are perpendicular to the transverse frame, the vertical frames are connected with the vertical rails B in a sliding mode, meanwhile, the vertical frames are further connected with the top drive device in a fixed mode, and the transverse frame is connected with the two sets of vertical frames to form a buckled state. The top drive device can be perfectly buckled to the vertical rail A or the vertical rail B through the locking device, meanwhile, the vertical rail A or the vertical rail B is locked through the guiding device, the vertical guiding function of the top drive device can be achieved, the locking function can be achieved, the top drive device is prevented from falling off, the service life of the top drive device is longer, and meanwhile use is safer.

The utility model provides replacement equipment. The replacement equipment comprises two frame bodies arranged side by side, each frame body comprises a stand column, a first cantilever beam and a second cantilever beam, the stand columns are arranged in the height direction and detachably connected to the top of a supporting structure used for installing to-be-maintained equipment, and the first cantilever beams and the second cantilever beams are arranged in the length direction and detachably connected to the top of the supporting structure; the two sides of the stand column are connected in the length direction; the transverse rail is arranged in the width direction, and the two ends of the transverse rail are connected with the two first cantilever beams respectively; the first pulley assembly is arranged on the transverse rail in a sliding mode and used for being connected with equipment to be maintained; one end of the second pulley assembly is slidably arranged on the first cantilever beam along the height direction, and the other end is fixedly connected with the cross rail; and a counter weight matched with the weight of to-be-maintained equipment can be hung on the second cantilever beam. And by arranging the frame body structure of the replacement equipment, the hoisting difficulty is reduced, and the replacement cost is saved.

The invention relates to a multipurpose polar region moon pool folding and unfolding system. A working platform is arranged on a ship body frame at the top of a moon pool cabin; the lifting winch and the umbilical cable winch are arranged on the working platform, the ROV track is arranged on the cabin wall on one side of the moon pool, and the ROV tackle is installed on the ROV track through idler wheels and moves up and down in the ROV track. The CTD track is arranged on the bulkhead on one side of the moon pool, and the CTD tackle is mounted on the CTD track through rollers and moves up and down in the CTD track; the guide joint is connected with an ROV hoisting winch through two cables; the device is used for butt joint and release with an ROV on a deck or under water. The CTD tackle is provided with a turnover oil cylinder, and the working state and the storage state of the ROV tackle are changed through stretching and retracting of the turnover oil cylinder. The tower lock is arranged at the lower part of the working platform and is used for storing and maintaining the ROV tackle and the ROV guide joint; and the underwater HPU is respectively used for driving the mechanism on the guide joint and the mechanism on the CTD tackle to act.

The utility model relates to the technical field of trash-cleaning machinery, in particular to a trash-cleaning lifting device with a novel structure, which comprises a portal frame, a trash-cleaning grab bucket, a trash-cleaning pulley and a trash-cleaning opening and closing lifting device, the trash-cleaning opening and closing lifting device comprises a trash-cleaning pulley lifting mechanism, a trash-cleaning grab bucket lifting mechanism and a trash-cleaning grab bucket opening and closing mechanism; the trash cleaning opening and closing lifting device is mounted on the portal frame; the trash cleaning grab bucket is installed above the trash cleaning tackle and slides along grid bars of the trash cleaning tackle. The trash cleaning grab bucket opening and closing mechanism is connected with the trash cleaning grab bucket through a grab bucket opening and closing steel wire rope, and the trash cleaning grab bucket is connected with the trash cleaning grab bucket lifting mechanism through a grab bucket lifting steel wire rope. The trash-cleaning lifting device has the advantages that the trash-cleaning grab bucket and the trash-cleaning pulley can be matched and synchronously operated by utilizing the trash-cleaning lifting mechanism, and the trash-cleaning lifting device with a novel structure is used for grabbing trash by using the grab bucket.

The invention discloses a cable laying pulley load performance test device, and belongs to the technical field of pulley performance test. The sliding rails are symmetrically arranged, the placement platform and the bottom baffle are in sliding fit, the detection assembly is located above the placement platform, the placement platform is used for bearing a tackle, the bottom baffle is used for auxiliary supporting, and the detection assembly is used for applying a vertical load. According to the pulley load performance test device for cable laying, by adjusting the relative positions of the placement platform and the bottom baffle plate on the slide rail, supporting and fixing spaces of cable pulleys with different sizes and structural forms can be flexibly adapted; the special-shaped tackle has the advantages that the special-shaped tackle is matched with the lockable sliding block and the self-centering structure, so that the technical problems that the special-shaped tackle is difficult to fix and the loading center deviates are solved, the lateral displacement or overturning of the tackle when the tackle is pressed is effectively limited, and the stability and safety of load performance detection and the accuracy of data are improved.

A lifting device capable of changing the taking height of a component material box is used for transporting installation materials on an automobile production line, relates to the technical field of design and manufacturing of material transporting box storage devices on the automobile production line and comprises a feeding unit, a discharging unit and a returning device. The feeding unit and the discharging unit are arranged in a frame structure composed of a top frame and a bottom frame, and the returning device is arranged on one side of the frame structure. The feeding unit comprises a feeding linkage table, a handrail, a pulley assembly and a pull wire assembly, the discharging unit comprises a discharging box linkage table, a discharging box platform lifting pulley, a balancing weight, a pull wire assembly and a pulley assembly, and the discharging box linkage table is arranged on a vertical stand column of the frame structure in a sliding and sleeving mode through the discharging box platform lifting pulley; the weight of the empty component box and the weight of the full component box are balanced by means of descending of the empty component box and automatic ascending of the full component box, the component box on the bottom layer is automatically lifted to the height where a human body fetches components comfortably through the linkage platform lifting device, and manual operation is facilitated.

The invention relates to the technical field of rail traffic engineering, in particular to a self-powered steel rail stress relief operation device and method for impacting the rail waist of a steel rail, the device comprises a rail impacting device, the rail impacting device is composed of a rail impacting device body, a limiting block and a limiting bolt, the rail impacting device body is of a concave structure, and the limiting block is arranged on the rail impacting device body; the top face of an inner cavity of the rail collision device body of the concave structure is matched with the top face of a steel rail top in shape, the two limiting blocks are arranged in the inner cavity of the concave structure of the rail collision device body, the side faces of the limiting blocks are matched with the side face of the steel rail top and the waist of the steel rail in shape, and the outer side faces of the limiting blocks are matched with the side wall of the inner cavity of the rail collision device body. The distance between the limiting block and the rail collision device main body is adjusted; the rail collision tackle comprises a tackle body, and a rail collision device pulley and a clamping pulley are installed on the tackle body and matched with a steel rail. The power module comprises a driving motor and a driving wheel set; and one side of the vibration reduction connecting module is connected to the power module through a bolt, and the other side of the vibration reduction connecting module is provided with a screwing fixing structure.

A side storage type pipe string conveying device, comprising: a drill string feeding arm (1) provided with a conveying slide groove for conveying a pipe string; a conveying trolley (2) provided in the conveying slide groove and capable of pushing the pipe string to move in the length direction of the conveying slide groove; at least one storage module provided on the drill string feeding arm (1) and located on one side of the conveying slide groove, wherein the storage module comprises storage mechanisms (3), loading mechanisms (5), and kick-out mechanisms (6) which are provided on the drill string feeding arm (1), the storage mechanisms (3) are used for storing pipe strings, the loading mechanisms (5) can move the pipe strings stored in the storage mechanisms (3) into the conveying slide groove, and the kick-out mechanisms (6) can move the pipe strings in the conveying slide groove into the storage mechanisms (3). The side storage type pipe string conveying device can improve the conveying efficiency of a power catwalk.

The utility model relates to the technical field of tunnel construction equipment, and discloses a double-layer steel bar positioning device for tunnel construction, which comprises a door-shaped frame, a plurality of arched tracks and two power components, pulley assemblies are mounted on the arched tracks, and the power components are used for driving the corresponding pulley assemblies to reciprocate along the arched tracks. The adjacent pulley assemblies are connected through a cross beam, a plurality of pairs of positioning plates are fixed to the cross beam in the extending direction of the cross beam, and two limiting rods are installed between the same pair of positioning plates. The utility model has the beneficial effects that the inner and outer reinforcing steel bars pulled to the top of the door-shaped frame are inserted into the gap between the positioning plates, then the insertion ends of the reinforcing steel bars are fixed with the anchor rods embedded into the ground, and finally the pulley assembly is started, so that when the pulley assembly moves to the other side along the arched track, the reinforcing steel bars are bent to be arc-shaped; finally, after the other end of the steel bar bent into the arc shape is fixed, positioning of the double-layer steel bar is completed, and the labor intensity of workers in the construction process is low.

The invention provides a side storage type pipe column conveying device, and relates to the technical field of oil drilling development, and the side storage type pipe column conveying device comprises a drill column feeding frame body, which is provided with a conveying chute for conveying a pipe column; the transportation tackle is arranged in the transportation sliding groove and can push the pipe column to move in the length direction of the transportation sliding groove; the at least one storage module is arranged on the drill column feeding frame body and located on one side of the conveying sliding groove, the storage module comprises a storage mechanism, a loading mechanism and a kicking-out mechanism which are arranged on the drill column feeding frame body, and the storage mechanism is used for storing pipe columns; the loading mechanism can move the pipe columns stored in the storage mechanism into the conveying sliding groove. The kicking-out mechanism can move the pipe columns in the conveying sliding groove into the storage mechanism. According to the side face storage type pipe column conveying device, the conveying efficiency of a power catwalk can be effectively improved.

The invention discloses a rotatable cantilever crane for erecting bridge sections and a method for erecting a steel box girder. The rotatable cantilever crane for bridge segment erection comprises a main framework, a crane carriage, a rotating mechanism and a lifting appliance, the main framework comprises two longitudinal main beams, a front cross beam and a rear cross beam are connected between the two longitudinal main beams, and a middle stand column and a rear stand column are connected to the lower portions of the middles and the lower portions of the rear ends of the longitudinal main beams correspondingly; the lower end of the middle stand column and the lower end of the rear stand column are both fixedly connected with the bottom frame, the bottom frame is movably matched with the walking track, supporting jacks are arranged on the lower portion of the front end and the lower portion of the rear end of the bottom frame, and a first main inclined supporting rod and a second main inclined supporting rod are detachably connected between the longitudinal main beam and the bottom frame. The hoisting trolley is movably arranged between the two longitudinal main beams, the lifting appliances are connected to the lower portion of a winch pulley block of the hoisting trolley through rotating mechanisms, and leveling jacks are arranged on the lifting appliances.

The utility model relates to the technical field of silent pulleys, in particular to a high-precision rope-clamping-free silent pulley which comprises a supporting frame, a rotating groove is formed in one side of the supporting frame, a roller body is rotationally connected into the rotating groove, and a connecting sleeve is fixedly connected to the side, close to the rotating groove, of the roller body. One of the attaching blocks is controlled by the pushing block to compress and push the spring, so that the attaching blocks compress and push the spring to be separated from the outside of the ratchet wheel, the roller body can rotate in one direction in the rotating groove at the moment, a rope can be pulled up in the rotating direction, and the roller body cannot rotate in the releasing process; therefore, the friction force is increased, the released force is reduced, the problems that a gap exists between the roller main body and the supporting frame and the roller main body and the supporting frame are prone to being clamped, and the force needed in the releasing process is larger due to an original bearing rotating mode are solved, the running stability of the roller main body is improved, and the force needed in the releasing process is reduced.

The invention discloses a curtain electric tackle, a curtain track and a curtain tackle track set, and relates to the technical field of curtain opening and closing equipment, the curtain electric tackle comprises a driving element, a gear transmission assembly, a walking element, a limiting element and a hooking element, the power output end of the driving element is connected with the power input end of the gear transmission assembly, and the power output end of the gear transmission assembly is connected with the hooking element; the power output end of the gear transmission assembly is connected with the walking element, the walking element is connected with the hanging element and used for walking in a curtain rail, the lower end of the hanging element is used for stretching out of the curtain rail and being connected with one side of the upper end of a curtain, and the limiting element is connected to the hanging element and used for limiting the hanging element. The limiting element is electrically connected with the driving element, and the limiting element can control the driving element to stop driving when the hooking element moves in place. The curtain electric tackle, the curtain track and the curtain tackle track set are simple in structure, long in service life and low in manufacturing cost.

The utility model relates to a hoisting device for a high-altitude fixed track. The hoisting device comprises a hoisting arm (1), a pulley (3), a track (8), a track supporting and fixing part, a hoisting arm rotating shaft and a hoisting sling, the lifting arm rotating shaft is fixed on the tackle (3), the lifting arm (1) is connected to the tackle (3), the tackle (3) is connected to the track (8), and the lifting appliance is connected to the lifting arm (1); the lifting arm (1) rotates around the lifting arm rotating shaft, the tackle (3) linearly moves along the track (8), and the lifting sling moves along the fixed track under the rotation of the lifting arm (1) and the movement of the tackle (3). The device disclosed by the utility model is suitable for hoisting a high-altitude fixed track, has the characteristics of simple structure, convenience in use, high working efficiency and strong applicability, and is particularly suitable for the pasting operation of a curing film for bridge pier and abutment tower column concrete.

The utility model discloses a large cantilever bent cap bottom die sliding device. The large cantilever bent cap bottom die sliding device comprises a bent cap body, a bent cap bottom die, a pulley and a suspension assembly. The cover beam body is formed above the cover beam bottom die in a pouring mode. A sliding rail is integrally poured above the capping beam main body; the pulley can slide on the slide rail; the bent cap bottom die comprises a plurality of split bottom die units; the suspension assembly is provided with a suspension rod and a lifting driving piece, and the lifting driving piece can suspend the bottom die unit through the suspension rod. By the adoption of the mode that the sliding rail, the tackle and the suspension assembly are embedded in the bent cap, the bottom die unit can be suspended and slid to a closed construction area to be disassembled, the construction step that hoisting operation is directly carried out above a traffic lane is avoided, the difficulty and occupied space of disassembling the large cantilever bent cap bottom die can be reduced, and the construction efficiency is improved. And the influence on the normal passing of social vehicles due to interference is prevented, so that the safety risk level is reduced.