947 results about "Block and tackle" patented technology

The invention belongs to the technical field of cranes, and particularly relates to a compact low-clearance anti-swing crane and an anti-swing method. The device comprises a door frame; a hoist frame; a reel; a transverse driving motor; the hoisting mechanism is in transmission connection with the reel through a steel wire rope; the two groups of upper lifting pulley blocks are mounted on the hoisting frame and are arranged in parallel along the axis direction of the winding drum; the two lower lifting pulley blocks are installed on the lifting mechanism and arranged in parallel in the axis direction of the winding drum. The rotating center line of the upper lifting pulley block and the rotating center of the roller are located on the same plane. And the rotating center line of the lower lifting pulley block is lower than that of the lifting mechanism. The driving motor is transversely arranged, power is transmitted to the winding drum through the gearbox, meanwhile, the static size in the vertical direction is further reduced through the arrangement of the upper and lower pulley blocks with the low gravity center and the design of the lifting hook assembly with the high gravity center, and therefore under the given workshop clearance height, the working efficiency is improved. And the vast majority of vertical space is released to an effective cargo lifting stroke.

The utility model provides a lifting device for a tower crane. The lifting device comprises a mounting seat, a bracket, a hanging bracket and a steel wire rope, the mounting seat is fixed to the top of a cabin, the support is mounted on the mounting seat, and the hanging bracket is arranged at the top of the support and provided with the hoisting pulley block. A lifting pulley block is arranged at the rear end of the on-tower crane, and when the on-tower crane is vertically arranged, the lifting pulley block and the hoisting pulley block are oppositely arranged; the hoisting pulley block comprises at least one hoisting pulley which is coaxially arranged, and the lifting pulley block comprises at least one lifting pulley which is coaxially arranged; a guide pulley block is arranged on a suspension arm of the on-tower crane; when the on-tower crane is lifted, one end of the steel wire rope is fixed on the on-tower crane or the hanging bracket, and the other end of the steel wire rope penetrates through the lifting pulley block, the hoisting pulley block and the guide pulley block and then is connected to a power unit arranged below the fan tower; the power unit tightens the steel wire rope to lift the on-tower crane.

The invention discloses a stretched noodle machine which comprises a support, a charging barrel, a die, a guide column, a pressing plate, a lever, a pulley block and a traction mechanism, the charging barrel and the guide column which is located above the charging barrel and can slide are arranged on the support, the pressing plate matched with the charging barrel is arranged at the lower end of the guide column, the die is arranged at the lower end of the charging barrel, the lever is rotationally arranged on the support, and the pulley block is arranged on the lever. The rear end of the lever is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the guide column, the distance between the rotating point of the lever and the rear end of the lever is smaller than that between the rotating point of the lever and the front end of the lever, a movable pulley block of the pulley block is arranged at the front end of the lever, and a fixed pulley block of the pulley block is arranged on the support. Compared with the prior art, the steel wire rope traction device has the advantages that the overall weight is light, the adaptability is good, and the production cost is low.

The invention relates to a ground test gravity unloading device for simulating a space microgravity environment. A base is fixedly arranged at the bottom of a fixed frame; a suspension system is arranged above the base and comprises a fixed pulley block mounted on the fixed frame, a pull rope is wound on the fixed pulley block, the bottom of one end of the pull rope is connected with a dynamometer through a tension spring, and the bottom of the other end of the pull rope is wound on a winch mounted on the base; the hoisting system comprises an external excitation device which is suspended right above the detected object; the displacement sensing system comprises a displacement sensor. The device is simple in principle and construction mode, has a relatively ideal controlled unloading mode, has the test advantage of controllable fine adjustment, is mainly used for simulating a space micro-vibration / microgravity environment to carry out a ground test, reproduces a space environment on the ground to the greatest extent so as to verify the functions and performance of a spacecraft and components thereof, and has a wide application prospect. For example, whether the vibration isolator can work reliably on orbit is verified, so that the on-orbit risk is remarkably reduced, the research and development cycle is shortened, and huge cost is saved.

The utility model relates to a lifting appliance capable of adjusting the balance of a bridge deck slab, which comprises a lifting beam, a plurality of fixed pulleys and a movable pulley, steel wire ropes are fixedly mounted on two sides of the top of the lifting beam, positioning holes for mounting the fixed pulleys are uniformly formed in a slab body of the lifting beam, and the fixed pulleys are mounted in the lifting beam. The fixed pulley is in transmission connection with a movable pulley through a traction rope; a lifting hook is hung on the movable pulley. According to the utility model, the pulley block is arranged in the lifting beam and is used for balancing the stress of the bridge deck slab, so that each lifting position is uniformly stressed, the bridge deck slab can be prevented from inclining after the stress of the bridge deck slab is balanced, the risk that a steel wire rope at a certain lifting position is snapped is also prevented, and the occurrence of safety accidents is prevented; therefore, the bridge deck slab prefabricated part can be better hoisted and conveyed.

The utility model relates to the technical field of railway catenary erection, and discloses a catenary carrier cable erection auxiliary tool which comprises a hoop used for being connected with a flat cantilever of a catenary in a clamped mode, an inverted L-shaped supporting arm fixedly connected to the top of the hoop and a pulley assembly hung on the supporting arm. The pulley assembly is positioned obliquely above a carrier cable seat on the flat cantilever; the pulley assembly comprises a wheel frame, a hook fixedly connected to the top of the wheel frame and a pulley rotationally connected to the lower portion of the inner side of the wheel frame, a notch is formed in the wheel frame, the pulley is lower than the notch, the carrier cable is erected on the pulley, and the hook is hung on the top of the supporting arm. When being used for mounting the carrier cable, the carrier cable does not need to bypass the end part of the flat cantilever from the lower part of the flat cantilever and then is mounted on the carrier cable seat, so that the moving distance of the carrier cable during mounting can be greatly shortened, and the carrier cable is more convenient and more labor-saving to mount.

The application relates to a compression-shear composite loading system based on a pulley system multi-point mean loading, and relates to a compression-shear composite loading system. In order to solve the problem that the traditional compression-shear composite loading is prone to uneven shear flow for a large-size composite stiffened wall plate structure, the application applies uniform compression loads to the side end surface loading end of a test piece through compression actuating cylinders and a flat pressing plate; two shear actuating cylinders output leftward shear loads along the upper end surface of the test piece; and the other two shear actuating cylinders output rightward shear loads along the lower end surface of the test piece; the loads are converted in direction through a pulley assembly and finally act on the shear plates on the upper and lower sides of the test piece. The application realizes the test under different compression-shear ratios by simultaneously adjusting the sizes of the compression and shear actuating cylinder forces, and optimizes the problem of uneven shear loading through the multi-point coordinated loading system, so that the shear of the measuring point is uniform, and the strength test of the large-size stiffened wall plate structure can be better satisfied.

The utility model discloses an anti-abrasion device for a steel wire rope, and relates to the technical field of mechanical traction equipment. The device comprises a supporting seat, two threading assemblies used for guiding a steel wire rope are arranged on the supporting base. An annular groove is formed in the supporting seat; the threading assembly is in sliding connection with the annular groove through a connecting piece. The two threading assemblies are rotationally symmetrical about the center of the annular groove; the threading assembly comprises threading pipes correspondingly arranged outside the annular groove in the radial direction. Pulley blocks are respectively arranged at two ends in the threading pipe; the pulley block comprises two guide pulleys which are vertically arranged at an interval; the guide pulley is rotationally connected in the threading pipe; the axial direction of the guide pulley is parallel to the tangential direction of the annular groove; the threading pipe is further provided with a positioning piece used for locking the threading pipe and the supporting base. The steel wire rope guiding device has the advantages that the guiding direction of the steel wire rope can be flexibly adjusted, and the friction weakening effect on the steel wire rope is better guaranteed.

A lifting assist device suitable for a calendering apparatus. When a foot pedal (2) is depressed, a movable pulley block and a pawl block (10) rise and drive a ratchet wheel (5) to rotate, and the ratchet wheel (5) drives a handwheel to rotate; when the foot pedal (2) is released, movable pulleys (8) and the pawl block (10) descend relative to the ratchet wheel (5) under the action of gravity, and the pawl block (10) is reset. By repeatedly depressing and releasing the foot pedal (2), a glass calender can be continuously lifted. When the glass calender is lifted into position, the lifting assist device is removed, operations such as inspection, maintenance and adjustment are performed, and finally the handwheel is rotated to lower the glass calender. Since the force of the human leg is several times that of the arm and the pulley block is used in conjunction, using the lifting assist device to drive the handwheel is much easier than rotating the handwheel by hand directly. The present invention can effectively solve the problem that current manual lifting of glass calenders is time-consuming and labor-intensive, thereby reducing the operational difficulty, increasing the lifting speed, and avoiding issues such as device failures and glass sticking to rollers caused by excessive accumulation of glass debris, and injuries resulting from improper operation.

The utility model provides a height-adjustable pulley assembly which comprises a base and pulleys connected to the two sides of the base, an adjusting seat is arranged on the inner side of the base, an adjusting block and a sliding block are arranged in the adjusting seat, the adjusting block is connected with an adjusting lead screw, the two ends of the adjusting lead screw penetrate through the adjusting seat and the sliding block respectively, and kidney-shaped holes are formed in the sliding block. The adjusting base is provided with a kidney-shaped hole, a positioning rod is arranged in the kidney-shaped hole in a penetrating mode, the two ends of the positioning rod sequentially penetrate through the adjusting base and the base from inside to outside respectively, the adjusting block and the sliding block are arranged in an inclined mode, and the sliding block axially translates when the adjusting block transversely moves through the adjusting lead screw. The height of the pulley can be flexibly adjusted, the using performance of the pulley assembly is improved, the adjusting block is driven by the adjusting lead screw in threaded connection to transversely move, the sliding block is made to axially translate, accurate adjustment of the height of the pulley is achieved, and the problems that the inner shell inclines and screws are clamped due to friction force are solved.

This invention provides a static weight-based multi-dimensional force sensor calibration device, comprising: a worktable, a force reversing mechanism, a rotating platform, a loading disk, and a loading assembly; the rotation center of the rotating platform is perpendicular to the rotation center of the force reversing mechanism; a turntable is fixed to the rotating platform, and a multi-component force sensor to be calibrated is fixed to the turntable; the loading disk is fixed to the top of the multi-component force sensor to be calibrated, and a loading connector is provided on the loading disk; a pulley assembly is provided on the top of the worktable; when calibrating the force of the multi-component force sensor to be calibrated, the line connecting the pulley assembly and the loading connector is on the central axis of the worktable; when calibrating the torque of the multi-component force sensor to be calibrated, the line connecting the pulley assembly and the loading connector is parallel to the central axis of the worktable. This device optimizes the force loading method, changing from loading each component separately to loading the resultant force through a single rope, avoiding mechanical interference during multi-dimensional loading, achieving high repeatability of force loading, and improving the accuracy and reliability of calibration results.

The invention relates to the technical field of hoisting machinery control, and provides a mast crane hoisting pulley block limiting control method and system. The method comprises the steps that limiting collision blocks are installed at the lifting final position and the lowest position of a mast crane lifting pulley block respectively, limiting sensing devices are installed at key nodes, corresponding to the limiting collision blocks, of the pulley block, and the limiting sensing devices are used for sensing position signals of the limiting collision blocks; the feedback control module continuously monitors a contact signal of the limiting induction device, if the limiting induction device continuously keeps the contact state for preset time in the slow stop process, the feedback control module sends an automatic stop instruction to the PLC control system, and the PLC control system controls the lifting pulley block to stop running; the induction signal of the limiting induction device is linked with the PLC control system, so that early warning, slow stop protection and automatic stop control of the lifting pulley block when the lifting pulley block is excessively lifted or descended are realized.

The invention relates to a system (1) for hoisting a load (C), in particular for hoisting a load (C) in the presence of a relative movement due to surges. The hoisting system (1) comprises at least one hoisting point (1a) having a frame (2) comprising:-controllable braking means (6) cooperating with the group of movable pulleys (52), and-manipulating means (8) cooperating with the group of movable pulleys (52) and configured to be able to restore the potential energy of the movable pulleys (52) in order to tend to increase said distance value (D).

The utility model relates to the technical field of jacquard pulley combination devices, and discloses a textile equipment jacquard pulley combination device which comprises two support plates which are oppositely arranged, the top ends and the bottom ends of the sides, close to each other, of the two support plates are both provided with installation assemblies, and the installation assemblies are arranged on the support plates. The two support plates are connected with a protection plate through a mounting assembly, a sealing groove is formed in the outer side of the protection plate, a pulley body is mounted on the close side of the protection plate, a shaft sleeve is arranged in the middle of the side wall of the pulley body in a penetrating mode, a shaft body is arranged on the side wall of the shaft sleeve in a penetrating mode, and buckles are fixedly connected to the middle ends of the close sides of the two support plates. According to the utility model, double-side clamping interlocking and thread auxiliary fastening are adopted on the connecting structure, the friction force and the interlocking tightness degree are increased, the service life of the device is prolonged, a built-in ball bearing protective sleeve is arranged on the protective structure, impurities are prevented, corrosion is avoided, transparent materials can be adopted, observation is convenient, and the protective performance is enhanced.

The utility model discloses a quick detachable pulley, including first baffle, second baffle, a plurality of first pulley assembly, a plurality of second pulley assembly, quick detach assembly, first baffle, second baffle is vertically left and right and is placed, a plurality of first pulley assembly all are from front to back array rotation connection between the lower end of first baffle and second baffle, a plurality of second pulley assembly all are from front to back array rotation connection between the upper end of first baffle and second baffle, the left side of a plurality of second pulley assembly all with the left side rotation connection of first baffle, a plurality of second pulley assembly right side and second baffle fixed connection, quick detach assembly is fixed in the top of first baffle and second baffle. The utility model has the advantages of convenient rope through pulley, and the wide use scene.

The utility model discloses a flour filtering and screening device which comprises a machine body support. The lower end of the discharging bin is inclined, and the discharging bin is provided with a discharging groove plate extending out of the machine body support; the pulley block is arranged at the upper end of the discharging bin and fixed to the side edge of the discharging bin through a support; the filtering and screening frame is provided with a screen and a vertical frame arranged on the screen, the vertical frame is installed on the guide rail, one end of the vertical frame is provided with a traction hook, and the guide rail is provided with a linear part and arc block parts located at the head end and the tail end; the belt motor is installed on one side of the machine body support and connected with the traction hook through a two-connecting-rod assembly to drive the filtering and screening frame to slide back and forth in a reciprocating mode. The powder discharging rolling brush is arranged on the machine body support and located at the upper end of the discharging groove plate. The belt motor drives the two-connecting-rod assembly to rotate, the filtering and screening frame is driven to transversely slide in a crank mode, and meanwhile the two ends of the guide rail are arranged in an arc mode, so that amplitude can be enlarged, flour dispersion is improved, and screening efficiency is improved.

This invention relates to the field of shaking table testing technology and discloses an electromagnetic shock protection device suitable for large-scale shaking table tests. It includes multiple support columns spaced along the outer perimeter of the shaking table and a surrounding arresting cable net assembly. The support columns are equipped with pulley assemblies. The surrounding arresting cable net assembly includes steel cables and at least one set of electromagnetic arresting assemblies. The steel cables are wound around the pulley assemblies, and the ends of the steel cables are connected to the electromagnetic arresting assemblies. The electromagnetic arresting assemblies include a spool and a generator connected to the spool. The steel cables are connected to the spool, and the generator is electrically connected to a control device. The control device controls the damping force on the steel cables by adjusting the excitation current of the generator. This invention aims to solve the problems of existing mechanical or hydraulic arresting systems, which suffer from slow response and inability to adjust damping force in real time, resulting in a harsh shock protection process, high peak force, and potential secondary damage.

The present application relates to the technical field of ship unloading equipment, and discloses a lifting device and a ship unloader, wherein the lifting device comprises: a rack, one side of which is provided with a stand; a cantilever frame, one end of which is slidably arranged on the stand; a material taking mechanism, which is arranged on the cantilever frame and is used for taking material; a lifting mechanism, which comprises a lifting traction rope, a lifting pulley assembly and a lifting driving unit; the lifting driving unit is fixed on the side of the rack far from the cantilever frame; the two ends of the lifting traction rope are connected with the cantilever frame and the lifting driving unit through the lifting pulley assembly; a counterweight mechanism, which comprises a counterweight traction rope, a counterweight pulley assembly and a counterweight piece; the counterweight piece is located on the side of the rack far from the cantilever frame; the two ends of the counterweight traction rope are connected with the cantilever frame and the counterweight piece through the counterweight pulley assembly. The lifting mechanism drives the cantilever frame and the material taking mechanism to lift at the same time, the lifting mode is simple, the material taking mechanism is convenient for digging different height materials, and the working efficiency of the material taking mechanism is improved.

This application discloses a retraction device, relating to the field of fully mechanized coal mining technology. The device includes: a main support; and a retraction assembly, which is located inside the main support. The retraction assembly includes an outer frame, a hydraulic cylinder, and a traction rope. This application replaces the traditional long wire rope traction of a winch with a short-distance traction rope driven by a hydraulic cylinder. Combined with a pulley block structure and a closed outer frame design, it significantly shortens the exposed section of the wire rope. Coupled with the overload protection mechanism of the pressure relief valve, it reduces the scope of rope breakage accidents from the source, lowering the risk of injury from slippage caused by wire rope breakage. Simultaneously, it enables single-person remote control operation using a remote control component, eliminating the high-intensity labor of multiple workers repeatedly carrying long wire ropes. Furthermore, the closed structure of the device allows for parallel operation at adjacent workstations, significantly improving the continuity and overall efficiency of retraction, and is particularly suitable for the safe and efficient retraction needs of heavy supports under complex roof pressure conditions.

The utility model relates to a drainage structure, in particular to a side slope drainage ditch structure which comprises an intercepting ditch and / or a side ditch arranged on a side slope, a self-dredging mechanism is arranged on one side in the intercepting ditch and / or the side ditch and comprises a water storage pool, a mud blocking wall is arranged on the top of the side wall of the side, facing the upstream side of the side slope, of the water storage pool, and the mud blocking wall is arranged on the side wall of the water storage pool. A hole is formed in the mud retaining wall, and a filtering device is arranged on the hole; a movable flashboard is arranged on the side wall of the side, facing the catchwater and / or the side ditch, of the reservoir, a floating ball is arranged in the reservoir, one end of a traction rope is connected with the floating ball, and the other end of the traction rope is connected with the movable flashboard through a pulley block. The anti-seepage drainage device is simple in structure, good in adaptability, good in anti-seepage drainage effect and low in maintenance cost, and has a self-dredging function.

The utility model discloses an ultra-short-axis composite bow which comprises a bow body, a bow piece, a tension adjusting assembly, a pulley block and a bow pushing indicating structure, and aims to solve the problem that in the prior art, a common shooting composite bow is difficult to carry on an original field competition field to be frequently transferred due to the fact that the size is large and the weight is heavy when the common shooting composite bow is used for an original field competition. Compared with a common composite bow with double-side bow pieces, the composite bow with the ultra-short shaft is designed, the design of the single-side bow pieces is adopted, the size of the whole bow is greatly reduced, the weight of the whole bow is reduced, the composite bow is particularly suitable for being carried and moved on an original field competition field, physical output is greatly reduced, and furthermore, by means of a pushing indication structure, the bow can be pushed conveniently and rapidly when pushed. When the pressures on the two sides of the bow handle are the same, corresponding indication is given, so that a green hand can be trained in the early stage conveniently, and the problem that bow pushing is not correct due to the fact that the pressures on the two sides are not uniform during bow pushing is solved.

The utility model discloses a pulley assembly of a sliding door and a high-load-bearing sliding door, and belongs to the technical field of doors and windows. The pulley shell is provided with a first track cavity and a second track cavity which are arranged in parallel; the number of the first shells is two, the two first shells are arranged in the first track cavity and the second track cavity respectively, the first shells are provided with first mounting cavities, at least two rotating shafts are arranged in the first mounting cavities, and the rotating shafts are arranged in the first mounting cavities at intervals; the second shell is rotatably arranged on the rotating shaft, a second mounting cavity is formed in the second shell, a first pulley and a second pulley are arranged in the second mounting cavity, the first pulley and the second pulley are arranged on the two opposite sides of the rotating shaft, and the first pulley and the second pulley can drive the second shell to rotate relative to the rotating shaft. The pulley assembly of the sliding door has the advantages of bearing high load, being stable in operation and reducing exposure of hardware.

The application discloses a large-span high-net-frame electromechanical pipeline hoisting equipment and a mounting method thereof, and relates to the field of pipeline hoisting. The equipment comprises a track, a hoisting pulley assembly mounted on the track, the hoisting pulley assembly being capable of hoisting or conveying pipelines along the track, two hoisting assemblies and two walking devices. The bottom of each hoisting assembly is connected with a hoisting frame through a sling. The equipment can control the clamping and releasing of the two pipelines by the clamping assembly, reduce the occurrence of pipeline falling off during hoisting, control the clamping or releasing state of the two pipelines by the clamping assembly, make the pipelines tilt, enable the tilted pipelines to pass through the steel frame structure of a building, change the clamping point of the pipelines, change the position of the pipeline hoisting point, reduce the shaking of the pipelines, and make the hoisting more efficient and safe.

The utility model relates to a kind of catalyst lifting device, and the purpose is to solve the technical problem of catalyst lifting device shaking, low efficiency. Technical scheme is: it includes fixed frame structure, guide rail structure, sliding wheel structure, traction rope, fixed pulley set and winch;Fixed frame structure includes bottom plate, support frame and lifting lug, support frame is vertically fixed on bottom plate, lifting lug is fixed on support frame;Guide rail structure includes guide rail and connecting pin, connecting pin both ends are inserted into guide rail and form guide rail structure, guide rail structure is arranged on the both sides of support frame, sliding wheel structure includes sliding wheel support, sliding wheel fixed frame and sliding wheel, sliding wheel fixed frame is arranged at the both ends of sliding wheel support, sliding wheel is arranged on sliding wheel fixed frame, and sliding wheel structure is fixed on support frame vertical beam;Fixed pulley set is arranged above fixed frame structure, traction rope one end is connected with lifting lug, and the other end is connected with winch by passing fixed pulley set.The utility model is low in cost, convenient to maintain, safe and reliable, and high in work efficiency.

This invention provides an eight-rope four-drum lifting device, comprising: an upper frame with first pulley groups on both sides in a first direction and second pulley groups on both sides in a second direction, and a lifting device connected to the bottom; a first lifting drum group including first and second lifting drums; a second lifting drum group including third and fourth lifting drums; four first steel wire ropes, each with one end wound around both ends of the first and second lifting drums, extending obliquely around the second pulley groups, and the other end connected to the second lifting point connector of a second micro-motion mechanism; and four second steel wire ropes, each with one end wound around both ends of the third and fourth lifting drums, extending obliquely around the first pulley groups, and the other end connected to the first lifting point connector of a first micro-motion mechanism that can move in a second direction. This invention enables the lifting device to move freely in six directions, improving work efficiency and pulley life.

The utility model discloses a switching mechanism and fitness equipment, the switching mechanism comprises a main body, the top of the main body is provided with a matching structure used for being matched and assembled with a mounting structure on a pulley block, and one side of the main body is provided with a mounting structure used for being matched and assembled with a matching structure on a pedal. The switching mechanism is simple in structure, when the pulley block is indirectly installed on the side edge of the pedal through the switching mechanism, the switching mechanism lifts the rotating seat of the pulley block, and therefore the rotating seat can deflect towards the inner side by a larger angle, and when a user conducts inward stretching action, the rotating seat can rotate by a larger angle. The pull rope cannot be abraded due to friction with the edge of the rotating seat and / or the pedal, so that the service life of the pull rope is prolonged, and the use cost of the fitness equipment is reduced. Moreover, the tension rope does not rub with the edge of the rotating seat and / or the pedal, so that the force generation data of the counter motor can be more accurate, and the user can master the training data more accurately.

Systems and methods simulate reduced-gravity environments using passive counterweight architectures that maintain a substantially constant offload force throughout the user's range of motion. The system may include one or more multi-segment articulated arms, each incorporating a cable routing system that preserves effective cable length during articulation. By routing the cable through coaxial apertures at the joints and through pulley assemblies encapsulated within hollow arm tubes, the offload force remains stable regardless of arm orientation. The system may include a magnetic singularity-avoidance mechanism employing opposed magnets positioned on adjacent arm segments. The magnetic detent biases the arm segments away from singular loading geometries, prevents uncontrolled rotation, and substantially reduces cable twist accumulation. Further embodiments may include gantry-based, trolley-based, or tilting-beam structures for enlarged workspace coverage, and optional friction-offset motors, low-stretch cables, or large-diameter pulleys to minimize hysteresis and maintain greater uniformity of the offload force.

The utility model relates to a pulley block transmission structure which comprises a force input shaft, a one-way rotating mechanism, a driving gear, a driven gear, a driven gear shaft and a rope wheel. One end of the force input shaft is connected with a power input mechanism, the other end of the force input shaft is connected with a one-way rotating mechanism, the bottom end of the one-way rotating mechanism is connected with one end of a driving gear, and the other end of the driving gear is sleeved with a gear sleeve; a driven gear shaft is arranged on one side of the driving gear, a driven gear and a rope wheel are arranged on the driven gear shaft, and the driven gear is meshed with the driving gear. According to the pulley block transmission structure, the rope wound on the pulley block is wound on the rope wheel in a one-way mode, and the falling situation caused by reverse movement of the rope wheel is effectively avoided; the end of the driving gear is sleeved with the gear sleeve, the overall structural stability of the driving gear is improved through the arrangement of the gear sleeve, the service life of the driving gear is prolonged, and meanwhile the safety of the pulley block transmission structure is improved.

The utility model discloses a linkage sliding door, which comprises a frame body, a sliding door and a linkage device, and can be divided into a driving door and a driven door, the linkage device comprises a driving door pulley block and a driven door pulley block; the driven door is movably assembled in the frame body through a driven door pulley block, and the driving door is movably assembled in the frame body through a driving door pulley block; a group of pulleys are symmetrically arranged on the driven door pulley block, and the group of pulleys are movably connected by arranging a belt; and a driving door pulley block on the driving door is connected with a driven door pulley block on the driven door through a connecting piece to work. Linkage of a plurality of sliding doors is achieved through the driven door pulley block containing the hydraulic damping rod and the spring, the limiting guide piece and the driving door pulley block, the buffering function is achieved, and the problems of linkage failure, slipping and swinging collision are solved based on the design that a linkage device is arranged on the upper portion and the limiting guide piece is arranged on the lower portion.

This invention relates to the field of geotechnical drilling engineering technology, and discloses a method for drilling small-diameter deep wells, comprising the following steps: using a positive circulation drilling rig to prepare a mud system based on the laterite soil of the construction site; using a composite reinforced roller cone bit for drilling operations in pebble layers; using a semi-automatic pulley system to connect or disconnect drill rods; using a positive circulation drilling rig to perform a segmented lifting and scraping wall composite process for drilling, in which a hole guide tool is used for scraping the wall; determining the depth of the aquifer before lowering the well casing; completing the butt joint connection of the well casing by welding, and completing the lowering and installation of the well casing; after the well casing is installed, sequentially performing mud replacement, air compressor agitation and well washing, and simultaneously completing the symmetrical backfilling of filter material; conducting a pumping test to complete the well completion quality acceptance. This invention can significantly improve drilling efficiency, well completion quality, and construction safety in complex pebble formations, while effectively reducing construction costs.