1732 results about "Block and tackle" patented technology

The present disclosure provides a foldable small flying and squat rack, which comprises a fixed rack, a pivot rack and pulley blocks disposed on the fixed rack and the pivot rack, wherein the pivot rack can rotate relative to the fixed rack, a counterweight assembly is disposed at the lower part of the fixed rack, and a connecting rope is connected at the upper part of the counterweight assembly; the connecting rope winds around the pulley blocks on the fixed rack and the pivot rack in turn to extend out, and then passes through a flying guide wheel to be connected to a grip part.

The invention relates to the technical field of crane equipment health monitoring, in particular to a crane running state health monitoring system and method. A sensing data acquisition unit is used for acquiring a winding drum vibration harmonic component, a steel wire rope leakage magnetic field gradient and a pulley block real-time load; the data analysis unit performs rotating speed synchronous variational mode decomposition on the vibration component to extract resonance characteristics, performs temperature and stress double-compensation correction on a leakage magnetic field gradient, quantifies an energy entropy attenuation rate through wavelet packet decomposition, constructs a phase difference model of a load and vibration to output a slip risk phase offset, calculates a load spectrum damage cumulant, and calculates a load spectrum damage cumulant; and after the four heterogeneous features are fused, a residual life coefficient is output through a dual-channel convolution-long and short-term memory hybrid neural network, and an execution unit triggers crane speed reduction control when the residual life coefficient is lower than a threshold value, so that the problems of insufficient multi-source data fusion and lack of dynamic compensation in the traditional technology are solved, and the fault early warning accuracy is improved.

A charging pile, comprising a housing (112), a counterweight component (109), a pulley block, and a traction rope (113), wherein the housing is provided with a cable output hole; the counterweight component is arranged in the housing, and is capable of moving in a vertical direction; the pulley block comprises a movable pulley (108) mounted on the counterweight component and a fixed pulley (104) mounted at the top of the housing; and a first end of the traction rope is fixed to the top of the housing, and a second end thereof sequentially passes around the movable pulley and the fixed pulley, then extends out of the housing through the cable output hole and connects to a gun cable, so as to suspend the gun cable. The charging pile can ensure that the force exerted by the traction rope on the gun cable remains unchanged during the process of dragging the gun cable, such that a situation where a user experiences greater resistance when dragging the gun cable over a longer distance is prevented, thereby allowing the user to drag the gun cable over longer distances with less effort, and making same convenient to use.

The utility model provides an auxiliary device for hanging a long-distance cable. The auxiliary device comprises a rope which is fixedly connected between a fixed point I and a fixed point II, at least one auxiliary support which is supported at a fixed point III in the middle section of the rope, and a plurality of hooks which are hung on the rope and are used for hanging the cable, wherein an elastic pulley block is arranged between the hook and the rope, a shell of the elastic pulley block is a C-shaped frame with an open groove, and the open groove allows the elastic pulley block to smoothly pass through the joint of the auxiliary support and the rope in the process of sliding along the rope. And meanwhile, the supporting point does not hinder the hook to move back and forth along the rope.

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 invention discloses an endoscopic robot for a high-pressure pipeline of a compressed air energy storage system, and mainly relates to the technical field of pipeline robots. Comprising a storage bin arranged on the outer wall of a vertical gas conveying pipeline, a window communicated with the storage bin is formed in the vertical gas conveying pipeline, a winch and a linear translation mechanism used for driving a lifting frame to translate are arranged in the storage bin, and a pulley assembly matched with a steel wire rope of the winch is arranged on the lifting frame. A pipeline robot is arranged at the end, away from the winch, of the steel wire rope, inspection equipment is carried on the pipeline robot, an end cover used for sealing the window is arranged at the end, away from the linear translation mechanism, of the lifting frame, and the pipeline robot is hung on the lifting frame. The pipeline robot is adjusted into the storage bin or the vertical gas conveying pipeline through the linear translation mechanism; the pipeline inspection requirement in the vertical gas transmission pipeline can be met, it is ensured that the defects of the inner wall of the pipeline are found in time, and healthy operation of the compressed air energy storage system is ensured.

A balance shoe for a block and tackle window balance system includes an enlarged head portion housing a locking system configured to receive at least a portion of a pivot bar and releasably engage a jamb track. An elongate tail portion configured to couple at least partially within a U-shaped channel of the window balance system. A front face, the front face of the elongate tail portion being adjacent to a base wall of the U-shaped channel when the elongate tail portion is coupled therein. The front face including an elongate channel configured to allow passage of the pivot bar from the elongate tail portion towards the locking system. The balance shoe also including at least one protrusion extending from the front face of the elongate tail portion and disposed at least partially within the elongate channel.

The invention discloses a hydraulic lifting container gantry crane which comprises a gantry crane main beam, a movable trolley frame is arranged on the gantry crane main beam, two trolley wheel sets in rolling contact with the gantry crane main beam are installed on each of the left side and the right side of the bottom of the trolley frame, and a container lifting appliance is arranged below the trolley frame. Through the driving of the hydraulic cylinder and the design of the pulley blocks, the distance from the lifting point of the lifting appliance to the highest point of the crane is reduced to be less than or equal to 3.2 m, under the safety distance of 8.3 m clearance, the lifting height of 5000 mm can still be realized, the problem of low clearance scene pain points is solved, when the workshop clearance is relatively high, four movable pulley blocks are selected, and when the workshop clearance is only 8.3 m, a container with the full load of 20 feet needs to be carried. The lifting requirement can be met by switching to six movable pulley sets, the whole lifting mechanism does not need to be replaced, the gantry crane is suitable for carrying scenes of containers with different clearances and different specifications, and the flexibility of the gantry crane is far better than that of a traditional winch type gantry crane.

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 invention relates to the technical field of driving rope devices, and particularly discloses a conical capstan rope-driven linear driver which comprises a conical capstan, a driving device, a closed-loop rope and a pulley block. The surface of the conical winch is provided with at least one winding groove with the diameter gradually changing in the axial direction. The driving device is used for driving the conical winch to rotate; the closed-loop rope is wound on the winding groove and forms a closed path through the pulley block; and the diameter of the variable-diameter section of the closed-loop rope wound on the winding groove is changed through rotation of the conical winch, so that the length ratio of the first rope section to the second rope section is changed, and the second pulley is driven to do translational motion relative to the first pulley. Bidirectional antagonistic driving and flexible movement of bionic muscles are achieved through synchronous reverse rotation of the conical winches and staggered winding of winding grooves in one side or two sides in combination with the elastic characteristic of a closed-loop rope. The diameter gradient structure enables driving force and stroke parameterization to be adjustable, and a mechanical structure does not need to be reconstructed; the closed path and the multi-circle winding design thoroughly avoid the risk that the rope is loosened and disengaged from the groove.

To provide a rope entanglement prevention device that is able to stably operate a grab bucket by preventing entanglement of a rope for operating the grab bucket, and to provide a method for using the grab bucket using the rope entanglement prevention device.SOLUTION: A rope entanglement prevention device 1 includes: shafts 21, 31 attached on an upper block in a state where an axis is directed in a horizontal direction; frames 22, 32 capable of swinging about the shaft 21, 31 in one direction and the other direction of an extending direction; front sheaves 23, 33 provided at respective first ends of the frames 22, 32 in the one direction and around which a first rope is wound on sides of outer peripheral portions of the front sheaves in the one direction; and rear sheaves 24, 34 provided at second ends of the frames 22, 32 in the other direction and around which a second rope is wound on sides of outer peripheral portions of the rear sheaves in the other direction.SELECTED DRAWING: Figure 5

A cutter assembly including one or more of a blade subassembly, a pulley subassembly, and a clamping subassembly is provided. The blade subassembly may include a carriage retaining a blade configured for translational motion along a guiderail. The carriage may be coupled to a belt of the pulley subassembly, and one or more pulleys supported by the frame may be configured to drive linear motion of the belt, thereby generating translational motion of the carriage. In some instances, a motor connected to a gear train may be operably coupled to the one or more pulleys and the belt. In some instances, a clamp of the clamping subassembly is provided to be releasably engaged by the carriage. One or more spring members acting on the clamp may cause the clamp to initiate an automatic cleaning action of the blade when the clamp is engaged by the carriage.

A culvert-clearing system is provided. The system includes a base plate with alignment features, a pivotable winch assembly, and a scraper mechanism designed for bidirectional movement through a culvert. The winch assembly may be hydraulically powered and optionally retrofitted to existing winches using a conversion kit that integrates a hydraulic motor with a drive shaft via an adapter plate and coupler. The hydraulic motor is operated via a control unit and pump system to ensure proper torque delivery. A scraper assembly with angled arms and teeth is connected to a winch cable routed through a pulley assembly anchored at the far end of the culvert, enabling effective debris dislodgment and transport toward an accessible opening.

The invention provides a manufacturing method of a movable hanging basket special for a flexible photovoltaic support, and belongs to the technical field of photovoltaic maintenance equipment. The manufacturing method of the movable hanging basket special for the flexible photovoltaic support comprises the steps of steel wire rope suspension system preparation, pulley assembly manufacturing, rectangular frame welding, bearing platform installation, enclosure system arrangement, connection system construction, movable control system installation, safety protection device arrangement and the like. Design and manufacturing of all parts are guided through mathematical models such as a hanging basket stability equation, a pulley assembly matching equation, a protection height calculation equation, a load distribution balance equation, a movement control force calculation equation, a shake suppression function and a multi-point stability balance function, and accurate matching of hanging basket structure parameters and operation requirements is achieved. The problems that a mobile operation hanging basket on an existing flexible photovoltaic support is insufficient in stability and low in safety can be solved.

The present application relates to a kind of luffing winding system installation method of spud leg crane.The installation includes the following steps: when luffing wire rope is threaded, luffing wire rope is wound into pulley block reel: arm support is in 3 ° shelf state and luffing wire rope is installed;After luffing wire rope is retracted after arm support is lifted to 12 °;After luffing wire rope is tightened after arm support is lifted to 16.65 °: main hook threading: main hook wire rope is pulled into pulley block and main hook reel by using guide rope;By using two main hook reels reverse pulling, realize the pre-tightening force of main hook wire rope safety number;Sub-hook threading: using guide rope to pull sub-hook wire rope into fixed and movable pulley block in reverse.The present application has the advantages that: when installing, arm support angle is reduced to 3 °, and redundancy waste of luffing wire rope is avoided by using tooling guide rope;When main hook threading, by using two main hook reels reverse pulling, realize the pre-tightening force of wire rope safety number;During sub-hook threading process, avoid multiple pulley block pre-tightening force winding lifting movable pulley during threading process.

The invention discloses a rope-driven mechanical arm system for a loading and unloading scene and a control method and a simulation test method of the rope-driven mechanical arm system. The rope-driven mechanical arm system comprises a mechanical arm body, a shoulder movement part, an elbow movement part and a wrist movement part, wherein the shoulder movement part, the elbow movement part and the wrist movement part are sequentially connected from the near end to the far end; the driving assembly is used for driving the shoulder movement part, the elbow movement part and the wrist movement part; the motion transmission assembly comprises a plurality of flexible ropes and a pulley block unit, the pulley block unit comprises a first pulley block and a second pulley block, the plurality of flexible ropes comprise an excitation rope and an antagonism rope, and the excitation rope and the antagonism rope extend or retract when rotating along with the motion part; the extension or shortening distance of the excitation rope is consistent with the shortening or extension distance of the antagonism rope; and the control assembly is used for controlling the driving assembly to drive the mechanical arm body to achieve the expected movement track. The problems of joint return stroke errors and low tail end positioning precision of the rope-driven mechanical arm in actual operation can be solved.

A safe and reliable trolley relates to the technical field of cranes and comprises a trolley frame, a duplex winding drum, a lifting hook and a balance mechanism, a balance mechanism for fixing a steel wire rope is arranged on the other side of the top of the trolley frame; arc-shaped dragging pads and first limiting switches for detecting broken shafts are arranged at the bottoms of the two ends, corresponding to the duplex winding drum, of the trolley frame; safety reverse hooks capable of being clamped with corresponding track beams are arranged on the two sides of the bottom of the trolley frame; a lifting hook is arranged below the trolley frame; the top of the lifting hook is rotationally connected with a movable pulley block; the two steel wire ropes are wound around the two ends of the duplex winding drum respectively and correspondingly connected with the balance mechanism after being wound around the movable pulley block. When a shaft is broken, the corresponding end of the duplex winding drum falls on the arc-shaped dragging pad and is locked by the arc-shaped dragging pad, and meanwhile, the first limiting switch is triggered to send a shutdown signal, so that the situation that the driving device continuously drives the duplex winding drum to rotate, and the duplex winding drum rolls off from the trolley frame is prevented.

The utility model discloses a supporting leg device for engineering machinery and the engineering machinery, the supporting leg device comprises a horizontal supporting leg assembly, the horizontal supporting leg assembly comprises a first supporting leg, a second supporting leg and a third supporting leg which are distributed in the horizontal direction, the first supporting leg can be transversely and movably embedded in a bottom frame of the engineering equipment, and the second supporting leg can be transversely and movably embedded in a bottom frame of the engineering equipment; the second supporting leg is nested in the first supporting leg in a transverse moving manner, and the third supporting leg is nested in the second supporting leg in a transverse moving manner; the vertical supporting leg assembly is vertically and telescopically arranged on the third supporting leg; the horizontal hydraulic cylinder is in driving connection with the first supporting leg; the first pulley assembly is used for pulling the second supporting leg to extend or retract relative to the first supporting leg; and the second pulley assembly is used for pulling the third supporting leg to extend or retract relative to the second supporting leg. The supporting leg device for the engineering machinery has the advantages of being simple in structure, low in control difficulty and low in cost.

A resistance pulley structure includes a symmetrical stay cord assembly, a transmission assembly, a resistance assembly and driving parts. The stay cord assembly includes a stay cord, a first and a second fixed pulley block and a movable pulley block. The movable pulley block includes a left and right movable pulleys, and the second fixed pulley block includes a second left fixed pulley and a second right fixed pulley. The rotation direction of the second fixed pulley block is parallel to the rotation direction of the first fixed pulley. After the stay cord bypasses the first fixed pulley, two ends bypass the left and right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, and connected to the driving parts.

The invention relates to the technical field of offshore pipeline body construction, and discloses a structure for preventing pipeline rotation during pipeline laying and a construction method.The structure comprises a pipeline launching frame used for launching a pipeline body and a rail piece arranged above the pipeline launching frame, and a plurality of fixed portal frames are arranged at the top of the pipeline launching frame; the inner wall of the fixed portal frame is connected with the top of the rail piece, a plurality of slidable pulley blocks are installed on the rail piece, anchor chains are connected to the bottoms of the pulley blocks, the bottom ends of the anchor chains are connected to the top of the pipeline body, and a plurality of buoys are installed on the surface of the pipeline body. According to the structure for preventing the pipeline from rotating in the pipeline laying process and the construction method, when the pipeline body slides down along the rail piece, rotation of the pipeline body is restrained through constraint of the anchor chain and the pulley block; the buoyancy balance provided by the buoy and the symmetrical sacrificial anode protection blocks on the two sides are used for balancing the gravitational torque after the pipeline body enters the sea, and rotation of the pipeline body is restrained.

A weightlifting rack assembly includes a weightlifting machine mounted on a frame having a plurality of frame members joined together. The machine includes at least one adjustable pulley assembly mounted on the frame, a weight source mounted on the frame, and a first cable having at least one adjustable input point defined by the adjustable pulley assembly, which is engaged with the weight source. The weightlifting machine also includes at least one fixed pulley assembly mounted on the weight rack, and a second cable having at least one fixed input point defined by the fixed pulley assembly and configured as a lat pull or low row input point. The assembly uses a double peanut pulley that is engaged by both cables, such that the first cable is provided with a 2:1 mechanical advantage, and the second cable is provided with a 1:1 mechanical advantage, in lifting the weight source.

The utility model discloses a steel plate traceless turnover device which comprises two oppositely-arranged lifting ropes, the tops of the lifting ropes are connected to a lifting device, hooks are formed at the bottoms of the lifting ropes and hook one side of a steel plate, a pulley block is arranged in the middles of the lifting ropes and comprises two idler wheels which are oppositely arranged up and down, and the two idler wheels are connected to the lifting device. The lifting rope penetrates through the middle of the two idler wheels and is attached to the two idler wheels, a V-shaped clamping opening is formed in the bottom of the pulley block, and the V-shaped clamping opening is clamped on the other side of the steel plate. According to the utility model, the safety and the efficiency of operation are improved, and meanwhile, the damage to plates is reduced to the greatest extent.

The invention relates to the technical field of wire detection, and particularly discloses a wire feeding device of a multi-split strain clamp detection robot and an automatic wire feeding method, and the device comprises a wiring mechanism, a lifting adjustment mechanism, a spacing adjustment mechanism, a traction winding and unwinding mechanism and a winding lifting mechanism. After the unmanned aerial vehicle pulls the free end of the pulling rope to cross the strain clamp, the winding units on the two sides synchronously wind the pulling rope, and the support is driven to be lifted in the z direction of the wiring arm. The distance adjusting mechanism dynamically adjusts the distance between the wiring arms on the two sides. The winding box synchronously winds and unwinds the stay wire and is matched with the pulley assembly to guide and lift the traction rope so as to ensure that the wiring mechanism stably moves in the x direction; the lifting adjusting mechanism adjusts the height of the bracket; the coiling lifting mechanism draws the pulley assembly to get close to the center through a coiling box coiling stay wire, and the traction rope is tensioned to make the walking wheel crimp the surface of the multi-split conductor, thereby completing wire feeding. Self-adaptive online in a high-altitude complex wire clamp environment is realized, and the stability and the automation level of robot deployment are remarkably improved.

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.