A hoist for bridge construction and construction method thereof

Abstract

The present invention relates to the technical field of hoists, and specifically discloses a hoist for bridge construction and a construction method thereof. The hoist for bridge construction includes: a support frame, a lifting platform, a steel cable, a winch and a cleaning component. The cleaning component includes a mounting seat, a fixed seat, a sliding shell, a detection rod and a cleaning rod. The mounting seat is arranged on the support frame, the fixed seat is arranged on the mounting seat, the steel cable passes through the fixed seat, a plurality of cleaning rods are distributed on the fixed seat at intervals and slide with the fixed seat, a driving mechanism is provided on the fixed seat, the detection rod slides in the fixed seat and frictionally engages with the steel cable, and the sliding shell slides on the mounting seat; the hoist for bridge construction and the construction method thereof of the present invention can clean the steel cable when the lubricating oil of the steel cable is insufficient to prevent excessive oil sludge from accumulating in the gap of the steel cable.

Description

Technical Field

[0001] The present invention relates to the technical field of hoists, and in particular to a hoist for bridge construction and a construction method thereof. Background Art

[0002] Hoists are commonly used equipment in bridge construction. Hoists are used to lift various heavy objects from the bottom of the bridge to the bridge deck. They are composed of a support system, a lifting system and a control system. The support system is generally a frame structure composed of columns and pull rods. The lifting system is generally a jack or a winch. When a winch is used as a lifting system, a steel cable is wrapped around the winch. The steel cable is composed of multiple strands of steel wire rope. The steel cable is connected to the lifting platform. The steel cable is wound by the winch to lift the lifting platform upward.

[0003] In some bridge construction operations, box girders can be prefabricated on the bridge deck. During the construction process, concrete transport trucks need to be lifted onto the bridge deck. Since jack hoists are inconvenient to install and the cost is high, winch hoists are generally used. However, after long-term use, the surface grease of the steel cable is severely depleted, which can easily cause damage to the wire rope and create a safety hazard. If excessive lubricating oil is applied, a large amount of sludge will be produced.

[0004] A Chinese patent document with authorization announcement number CN118405598B discloses a wire rope cleaning and care device for a crane, which includes a trolley, a crossbeam and a leg. The lower part of the crossbeam is provided with a movable part that can move synchronously and in the same direction as the trolley. The movable part is a rectangular cavity structure formed by splicing a top plate, a bottom plate and several side plates. The top plate surface is provided with several upper through holes that correspond one-to-one to and are adapted to the wire ropes of the lifting equipment. The bottom plate surface is provided with several lower through holes that correspond one-to-one to the several upper through holes and are adapted to the wire ropes. A smearing mechanism for smearing grease on the wire rope is provided between each corresponding upper through hole and lower through hole, and a cleaning mechanism for cleaning dust and scraping dirt from the wire rope when it is in a wound and rising state is provided at the lower part of each lower through hole.

[0005] The above patent follows the synchronous movement of the lifting equipment trolley, so that during the lifting operation of the lifting equipment, dust, impurities or dirt on the surface of the wire rope can be cleaned in real time, and grease can be applied to the surface of the wire rope as needed. However, since the steel cable is formed by twisting multiple strands of steel wire rope, the steel cable is not a cylindrical structure, and there is an inward concave gap between two adjacent steel wire ropes. The above cleaning mechanism cannot clean the gap between the steel wire ropes. The mud and sand adhered to the surface of the steel cable contacts the lubricating oil to produce sludge, which leads to a decrease in the lubricating fluid between the gaps of the steel wire ropes, increases the friction between the steel wire ropes, and easily causes damage to the steel cable. Summary of the Invention

[0006] The present invention provides a hoist for bridge construction and a construction method thereof, aiming to solve the problem in the related art that the oil sludge in the twisted gap of the wire rope cannot be cleaned during the use of the hoist.

[0007] The bridge construction hoist of the present invention comprises: a support frame, a hoisting platform, a steel cable and a winch;

[0008] The support frame is supported on the foundation, the hoist is arranged beside the support frame, the lifting platform is slidably fitted in the support frame, one end of the steel cable is wound around the hoist, and the other end passes through the guide wheel and is connected to the lifting platform;

[0009] A cleaning assembly is also provided, which includes a mounting seat, a fixed seat, a sliding shell, a detection rod and a cleaning rod. The mounting seat is provided on the support frame, the fixed seat is in a circular ring shape, and is fixed on the mounting seat, the steel cable passes through the fixed seat, and a mating ring is rotatably fitted on the fixed seat. A plurality of cleaning rods are spaced apart on the mating ring and slide with the mating ring, and the cleaning rod can extend into the gap of the side wall of the steel cable. A driving mechanism is provided on the fixed seat, and the driving mechanism is used to drive the cleaning rod to move, the detection rod slides in the fixed seat and frictionally fits with the steel cable, the sliding shell slides on the mounting seat and is connected to the mounting seat by a first elastic member, and the detection rod can push the sliding shell to move downward, thereby separating the sliding shell from the fixed seat, thereby enabling the driving mechanism to operate.

[0010] Beneficial effect: one end of the steel cable is wound around the winch, and the other end thereof is fixedly connected to the lifting platform after passing through the cleaning assembly. The winch controls the upward or downward movement of the lifting platform by twisting the steel cable, so that the steel cable can move up and down relative to the cleaning assembly. If there is insufficient lubricating oil in some areas of the steel cable, when the steel cable moves downward relative to the cleaning assembly, the friction between the area with insufficient lubricating oil and the detection rod will increase. Under the action of friction, the steel cable will drive the detection rod to move downward, and the downward movement of the detection rod pushes the sliding shell to move downward, thereby releasing the limit on the driving mechanism, and the driving mechanism drives the cleaning rod to extend out of the fixed seat, and the cleaning rod extends into the gap of the steel cable and scrapes off the sludge in the gap of the steel cable to remove the sludge in the gap of the steel cable. When the lubricating oil on the steel cable is normal, the lubricating oil will reduce the friction between the steel cable and the detection rod, thereby causing the steel cable to slide relative to the detection rod and the detection rod to remain stationary, thereby realizing the cleaning of the steel cable as needed and avoiding the cleaning rod from scratching the steel cable for a long time and causing damage to the steel cable.

[0011] Preferably, the driving mechanism includes a driving rod, a driving ring and a driving gear. The driving rod is slidably fitted in the fixed seat and is connected to the fixed seat through a second elastic member. The driving rod can extend out of the fixed seat and can abut against the sliding shell. The driving ring is slidably fitted in the fixed seat and is spaced apart from the driving rod. The driving ring can abut against the cleaning rod. The driving gear is arranged between the driving rod and the driving ring and is respectively engaged with the driving rod and the driving ring. The cleaning rod is connected to the matching ring through a reset spring.

[0012] Preferably, a heater is further provided on the fixing seat, a sensor is provided on the sliding housing, the detection rod can abut against the sensor, so that the sensor sends an electrical signal, and the heater can receive the electrical signal, thereby heating the steel cable.

[0013] The effect is that the heater can heat the steel cable, thereby removing the oil sludge in the gap of the steel cable, making it easier for the cleaning rod to remove the oil sludge in the gap of the steel cable.

[0014] Preferably, the mating ring is provided with a plurality of suction holes spaced apart along its circumference, an annular passage is provided in the fixing seat, the annular passage is connected with each of the suction holes, and a sewage pipe is also provided on the fixing seat, one end of the sewage pipe is connected with the annular passage, and the other end thereof is connected with an external pump.

[0015] The effect is that the pump forms negative pressure in the annular passage through the sewage pipe. Under the action of negative pressure, the liquid sludge attached to the steel cable can enter the annular passage through the suction hole and be discharged from the sewage pipe. This process can suck out the residual sludge attached to the steel cable and prevent the sludge from remaining on the steel cable.

[0016] Preferably, the end surface of the detection rod has an inwardly recessed arc groove, and the arc groove can be in close contact with the steel cable.

[0017] The effect is that the inwardly recessed arc groove can increase the contact area between the detection rod and the steel cable, thereby preventing the friction between the detection rod and the steel cable from being too small to overcome the elastic force of the first elastic member.

[0018] Preferably, a clamping mechanism is provided on the sliding shell, and two clamping mechanisms are respectively provided at the upper and lower ends of the sliding shell, and the clamping mechanism includes a rotating ring, a first clamping block, a second clamping block and an electric push rod. The rotating ring rotatably fits on the sliding shell, and a driving member is provided in the sliding shell, and the driving member is used to drive the rotating ring to rotate. The first clamping block and the second clamping block are both slidably fitted on the rotating ring, and the two are symmetrically distributed about the center of the rotating ring. There are two electric push rods, both provided on the rotating ring, and the two electric push rods are respectively connected to the first clamping block and the second clamping block, and the first push rod pushes the first clamping block and the second clamping block close to each other, so that the steel cable can be clamped.

[0019] The effect is that the driving member and the electric push rod can receive the electrical signal sent by the sensor, the electric push rod pushes the first clamping block and the second clamping block closer to each other and clamps the steel cable, and then the driving member drives the rotating ring to rotate, causing the steel cable to twist, thereby loosening the steel cable and increasing the gap in the steel cable, making it easier for the cleaning rod to clean the gap in the steel cable.

[0020] Preferably, an oil storage ring is provided on the fixing seat, the interior of the oil storage ring is hollow, an oil pipe is provided on the oil storage ring, the oil pipe is connected to the external oil tank, a brush is provided on the oil storage ring, lubricating oil is stored in the oil storage ring, the lubricating liquid can penetrate into the brush, and the brush can stop the steel cable.

[0021] Preferably, the support frame is composed of a plurality of columns and pull rods, and the height of the support frame can be changed as needed.

[0022] A construction method for a bridge construction hoist, applied to the above-mentioned bridge construction hoist, comprises the following steps:

[0023] The first step is to set up the base, set up multiple cement mixing piles on the ground at the location of the elevator platform, and set up a concrete foundation on the cement mixing piles;

[0024] The second step is to install the first section of the hoist. Use external lifting equipment to lift the columns one by one. The bottom end of the first section of the column is firmly connected to the foundation through pre-buried anchor bolts.

[0025] The third step is to install the lifting platform, install the guide rails on the support frame, and slide the lifting platform onto the guide rails;

[0026] The fourth step is to install the standard section of the support frame. The standard section of the support frame is installed simultaneously with the lifting platform. First, install the vertical poles, horizontal rods, and diagonal rods to form a frame structure on the support frame base. Install the guide wheels at the same time as the lifting platform.

[0027] The fifth step is to set up the winch and steel cable. The winch should be fixed on a flat and solid foundation and away from the dangerous working area. Wrap one end of the steel cable around the winch, pass the steel cable around the guide wheel, and fix it to the lifting platform.

[0028] Beneficial effects: By setting up a base, the foundation of the hoist is reinforced to prevent the hoist from sinking during operation. The hoist is assembled from multiple standard sections, and each standard section is composed of a column and a pull rod. The number of standard sections can be determined according to needs, and the height of the hoist can be adjusted. The lifting platform and the standard section are installed simultaneously, which can save time and improve construction efficiency.

[0029] Preferably, in the fourth step, a plurality of cleaning components are installed on the top of the support frame, and each steel cable passes through a corresponding cleaning component and is connected to the lifting platform.

[0030] By adopting the above technical solution, the beneficial effects of the present invention are:

[0031] When the lubricating oil on the steel cable is normal, the lubricating oil will reduce the friction between the steel cable and the detection rod, thereby making the steel cable slide relative to the detection rod and the detection rod remain stationary, thereby achieving the goal of cleaning the steel cable as needed and avoiding the cleaning rod from scratching the steel cable for a long time and causing damage to the steel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a hoist for bridge construction according to an embodiment of the present invention.

[0033] Figure 2 It is a schematic structural diagram of a cleaning component according to an embodiment of the present invention.

[0034] Figure 3 2 is a cross-sectional view of a cleaning component according to an embodiment of the present invention.

[0035] Figure 4 It is a cross-sectional view of the cleaning component of an embodiment of the present invention from another perspective.

[0036] Figure 52 is a cross-sectional view of a fixing seat according to an embodiment of the present invention.

[0037] Figure 6 2 is a front view of a driving mechanism according to an embodiment of the present invention.

[0038] Figure 7 2 is a schematic diagram of the drive ring structure of an embodiment of the present invention.

[0039] Figure 8 2 is a schematic structural diagram of a clamping mechanism according to an embodiment of the present invention.

[0040] Figure 9 2 is a cross-sectional view of an oil storage ring according to an embodiment of the present invention.

[0041] Figure 10 1 is a top view of an oil storage ring according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] 1000, support frame; 2000, lifting platform; 3000, steel cable; 4000, winch; 5000, cleaning component;

[0044] 1. Mounting seat; 2. Fixed seat; 3. Sliding housing; 31. First elastic member; 4. Detection rod; 5. Matching ring; 6. Cleaning rod; 71. Drive rod; 72. Drive ring; 73. Drive gear; 74. Second elastic member; 75. Return spring; 8. Heater; 9. Sensor; 101. Suction hole; 102. Annular passage; 103. Drain pipe; 11. Clamping mechanism; 111. Rotating ring; 112. Drive member; 113. First clamping block; 114. Second clamping block; 115. Electric push rod; 121. Oil storage ring; 122. Brush; 123. Oil pipeline. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0046] like Figures 1 to 10 As shown, the hoist for bridge construction of the present invention includes: a support frame 1000, a lifting platform 2000, a steel cable 3000, a winch 4000 and a cleaning component 5000, wherein the support frame 1000 is supported on the foundation, the lifting platform 2000 is slidably fitted on the support frame 1000, the winch 4000 pulls the lifting platform 2000 up and down through the steel cable 3000, and the cleaning component 5000 is used to clean the steel cable 3000.

[0047] Specifically, if Figure 1As shown, the support frame 1000 is composed of a plurality of columns and tie rods, the tie rods include transverse tie rods and diagonal tie rods, and the plurality of columns, transverse tie rods and diagonal tie rods form a rectangular frame structure.

[0048] The support frame 1000 is provided with a slide rail extending in the up and down directions. The lifting platform 2000 slides with the support frame 1000 through the slide rail. The winch 4000 is fixedly arranged next to the support frame 1000. The support frame 1000 is provided with a guide wheel. The steel cable 3000 is composed of multiple strands of steel wire ropes twisted together. One end of the steel cable 3000 is wrapped around the winch 4000, and the other end of the steel cable 3000 passes around the guide wheel and is fixedly connected to the top of the lifting platform 2000. The winch 4000 controls the up and down movement of the lifting platform 2000 by pulling the steel cable 3000.

[0049] like Figures 2 to 7As shown, the cleaning assembly 5000 includes a mounting base 1, a fixing base 2, a sliding shell 3, a detection rod 4 and a cleaning rod 6. The mounting base 1 is an L-shaped plate. The mounting base 1 is detachably arranged on the support frame 1000 by bolts. The sliding shell 3 is slidably fitted on the mounting base 1. The bottom end of the sliding shell 3 is elastically connected to the mounting base 1 through a first elastic member 31. The first elastic member 31 is an elastic column. The top end of the first elastic member 31 is fixedly connected to the sliding shell 3, and its bottom end is fixedly connected to the mounting base 1. The sliding shell 3 can be installed relatively The seat 1 moves up and down, the fixed seat 2 is located in the sliding shell 3, the fixed seat 2 is fixedly set on the mounting seat 1, the fixed seat 2 is a cylindrical structure, the fixed seat 2 is sleeved on the circumference of the steel cable 3000, the detection rod 4 is an L-shaped rod, the detection rod 4 slides in the fixed seat 2, the bottom end of the detection rod 4 passes through the fixed seat 2 and can stop against the bottom surface of the sliding shell 3, the top end of the detection rod 4 stops against the steel cable 3000, and the contact part between the detection rod 4 and the steel cable 3000 has an inward concave arc groove, and the steel cable 3000 is frictionally fitted with the detection rod 4. A matching ring 5 is rotatably fitted in the fixed seat 2, and a plurality of cleaning rods 6 are provided on the matching ring 5 and are evenly spaced along the circumference of the matching ring 5. Each cleaning rod 6 is slidably fitted with the matching ring 5. The cleaning rod 6 is elastically connected to the matching ring 5 through a return spring 75. One end of the return spring 75 is fixedly connected to the outer end of the cleaning rod 6, and the other end of the return spring 75 is fixedly connected to the matching ring 5. The cleaning rod 6 can move radially along the matching ring 5, and the cleaning rod 6 can extend out of the matching ring 5 and stop against the steel cable 3000. A driving mechanism is provided in the fixed seat 2, and the driving mechanism includes a driving rod 71, a driving ring 72 and a driving gear 73. The driving rod 71 is slidably fitted in the fixed seat 2 and is elastically connected to the fixed seat 2 through a second elastic member 74. The second elastic member 74 is a spring, and the top of the second elastic member 74 is fixedly connected to the driving rod 71. The bottom end of the second elastic member 74 is fixedly connected to the fixed seat 2, and the driving rod 71 can move up and down relative to the fixed seat 2, and when the driving rod 71 moves downward, it can pass through the bottom end of the fixed seat 2 and stop with the sliding shell 3. The driving ring 72 is located in the fixed seat 2 and is spaced apart from the driving rod 71. The driving ring 72 slides with the fixed seat 2. The inner side wall of the driving ring 72 is a sloped structure. The inner side wall of the driving ring 72 can stop with the cleaning rod 6. The driving gear 73 is located in the fixed seat 2 and is rotatably connected to the fixed seat 2. The driving gear 73 is located between the driving rod 71 and the driving ring 72, and meshes with the driving rod 71 and the driving ring 72 respectively. When the driving rod 71 moves downward, the driving ring 72 will be driven to move upward through the driving gear 73. When the driving rod 71 moves upward, the driving ring 72 will be driven to move downward through the driving gear 73.

[0050] In the initial state, under the action of the first elastic member 31, the bottom surface of the sliding housing 3 stops at the bottom end of the fixing seat 2. At this time, the second elastic member 74 is stretched and applies downward pressure to the driving rod 71, so that the driving rod 71 stops at the sliding housing 3. When the steel cable 3000 moves downward, if the lubricating oil on its surface is insufficient, the friction force will push the detection rod 4 to overcome the elastic force of the first elastic member 31 and move downward, and push the sliding housing 3 to move downward, so that the sliding housing 3 is out of contact with the bottom end of the fixed seat 2, and the sliding housing 3 releases the limit on the driving rod 71, and the second elastic member 74 contracts. Under the elastic force of the second elastic member 74, the driving rod 71 moves downward and drives the driving ring 72 to move upward through the driving gear 73. The driving ring 72 gradually stops with the cleaning rod 6 and pushes the cleaning rod 6 to move radially inward along the mating ring 5, so that the cleaning rod 6 extends out of the mating ring 5 and extends into the gap of the steel cable 3000, and stops with the steel cable 3000. At this time, the steel cable 3000 moves downward relative to the cleaning rod 6, and the cleaning rod 6 can scrape off the oil sludge in the gap of the steel cable 3000.

[0051] like Figure 4 and Figure 5 As shown, a heater 8 is also provided on the fixing base 2. The heater 8 is an electric heating device in conventional technology. The heater 8 is fixedly mounted on the fixing base 2 and is located above the cleaning rod 6. A sensor 9 is provided on the sliding housing 3. The sensor 9 is a pressure sensor. The detection rod 4 can contact the sensor 9, and the sensor 9 can send an electrical signal. The heater 8 can receive the electrical signal sent by the sensor 9, thereby controlling the opening and closing of the heater 8. The heater 8 can melt the sludge attached to the cable, thereby facilitating the cleaning rod 6 to scrape the melted sludge from the gaps in the cable.

[0052] like Figures 3 to 5 As shown, the mating ring 5 is further provided with a plurality of suction holes 101 spaced along its circumference, an annular passage 102 is provided in the fixing seat 2, and each suction hole 101 is connected to the annular passage 102. A drain pipe 103 is fixedly provided in the fixing seat 2, and one end of the drain pipe 103 is connected to the annular passage 102, and the other end thereof is connected to an external pump. The external pump can perform extraction through the drain pipe 103, so that a negative pressure is formed in the annular passage 102, and the melted sludge is sucked into the annular passage 102 through the suction holes 101, and then the melted sludge is pumped to the external pump through the drain pipe 103, thereby discharging the sludge from the fixing seat 2.

[0053] like Figure 3 、 Figure 4 and Figure 8As shown, the sliding housing 3 is provided with a clamping mechanism 11, and the two clamping mechanisms 11 are respectively provided at the upper end and the lower end of the sliding housing 3. The clamping mechanism 11 includes a rotating ring 111, a driving member 112, a first clamping block 113, a second clamping block 114 and an electric push rod 115. The rotating ring 111 rotates with the sliding housing 3, and the driving member 112 is fixedly provided on the sliding housing 3. The driving member 112 is a motor, and a rotating gear is fixedly provided at its output end. The rotating gear is engaged with the rotating ring 111, and the driving member 112 can drive the rotating ring 111 to rotate through the rotating gear, thereby causing the rotating ring 111 to rotate. The rotating ring 111 can rotate relative to the sliding shell 3 along its circumference. The first clamping block 113 and the second clamping block 114 are both slidingly fitted on the rotating ring 111. The first clamping block 113 and the second clamping block 114 have the same structure and are symmetrically distributed. The two electric push rods 115 are both fixedly arranged in the sliding shell 3 and are fixedly connected to the first clamping block 113 and the second clamping block 114 respectively. The two electric push rods 115 are used to push the first clamping block 113 and the second clamping block 114 towards or away from each other. The driving member 112 and the electric push rod 115 can receive the electrical signal sent by the sensor 9.

[0054] like Figures 3 to 5 、 Figure 9 and Figure 10 As shown, an annular cavity is provided at the bottom of the fixing seat 2, and an oil storage ring 121 is provided in the annular cavity. The oil storage ring 121 and the fixing seat 2 are slidably matched. The bottom end of the oil storage ring 121 is fixedly connected to the driving rod 71. The driving rod 71 moves up and down to drive the oil storage ring 121 to move up and down. The inside of the oil storage ring 121 is hollow and filled with lubricating oil. An oil delivery pipe 123 is fixedly provided at the bottom end of the oil storage ring 121. The oil delivery pipe 123 is a flexible rubber tube. One end of the oil delivery pipe 123 is connected to the oil storage ring 121, and the other end is connected to an external oil tank. The external oil tank can deliver the lubricating oil into the oil storage ring 121 through the oil delivery pipe 123. The inner wall of the oil storage ring 121 is provided with a plurality of brushes 122 distributed along its circumferential direction. The inner end of the brush 122 passes through the inner wall of the oil storage ring 121 and extends into the interior of the oil storage ring 121. The outer end of the brush 122 can contact the steel cable 3000. The lubricating oil in the oil storage ring 121 can seep out of the oil storage ring 121 through the brush 122 and adhere to the steel cable 3000 through the brush 122.

[0055] In the initial state, the oil storage ring 121 is located in the annular cavity, the brush 122 contacts the side wall of the annular cavity, the driving rod 71 moves downward, and the oil storage ring 121 and the driving rod 71 move downward synchronously, thereby extending out of the fixed seat 2. At this time, the brush 122 can stop with the steel cable 3000, the driving rod 71 moves upward, and the oil storage ring 121 and the driving rod 71 move upward synchronously, so that the oil storage ring 121 can be stored in the annular cavity and the brush 122 can be disengaged from the steel cable 3000.

[0056] The implementation principle of the bridge construction hoist according to the embodiment of the present invention is as follows:

[0057] The cleaning assembly 5000 is set on the support frame 1000, and the steel cable passes through the cleaning assembly 5000. When the steel cable moves downward, if there is a part of the steel cable that is insufficient in lubricating oil, when this part of the steel cable 3000 contacts the detection rod 4, due to insufficient lubricating oil, under the action of friction, the steel cable 3000 drives the detection rod 4 to move downward, and the detection rod 4 squeezes the sensor 9 and drives the sliding housing 3 to overcome the elastic force of the first elastic member 31 and move downward, so that the sliding housing 3 and the steel cable 3000 move downward synchronously, and the sensor 9 sends an electrical signal, thereby starting the heater 8. The heater 8 heats the steel cable 3000, thereby melting the sludge on the steel cable 3000. The driving member 112 and the electric push rod 115 can also receive the electrical signal sent by the sensor 9. The electric push rod 115 drives the first clamping block 113 and the second clamping block 114 to clamp the steel cable 3000. Each driving member 112 drives the rotating ring 111 of the two clamping mechanisms 11 to rotate in the opposite direction, and twists the steel cable 3000 through the corresponding first clamping block 113 and the second clamping block 114, so that the steel cable 3000 is loosened, thereby increasing the gap on the steel cable 3000. When the sliding shell 3 moves downward, the sliding shell 3 disengages from the driving rod 71, and the driving rod 71 moves downward under the action of the second elastic member 74, and drives the driving ring 72 to move upward through the driving gear 73. During the upward movement of the driving ring 72, it will stop with the cleaning rod 6 and push the cleaning rod 6 to overcome the elastic force of the return spring 75 and move inward along the radial direction of the fixed seat 2, so that the cleaning rod 6 extends out of the matching ring 5 until the cleaning rod 6 extends into the gap of the steel cable 3000 and stops with the steel cable 3000. During the downward movement of the steel cable 3000, the cleaning rod 6 can move along the gap of the steel cable 3000. In this process, the matching ring 5 rotates relative to the fixed seat 2 under the push of the cleaning rod 6, the external pump is started, and negative pressure is formed in the annular channel through the drain pipe 103. The scraped sludge and the residual sludge on the steel cable 3000 will enter the annular channel through the suction hole 101 under the action of the negative pressure and be discharged through the drain pipe 103. When the driving rod 71 moves downward, the oil storage ring 121 will move downward synchronously with the driving rod 71. The oil storage ring 121 extends from the annular cavity, so that the brush 122 can contact the steel cable 3000. The lubricating oil in the oil storage ring 121 seeps out from the oil storage ring 121 through the brush 122, and the brush 122 can evenly attach the lubricating oil to the steel cable 3000.

[0058] When the detection rod 4 is in normal partial contact with the steel cable 3000, the friction between the detection rod 4 and the steel cable 3000 is reduced due to the effect of the lubricating oil, the pressure of the detection rod 4 on the pressure sensor 9 is reduced, and the pressure sensor 9 stops sending an electrical signal, thereby turning off the heater 8, and the electric push rod 115 drives the first clamping block 113 and the second clamping block 114 to move away from each other and disengage from the steel cable 3000, releasing the clamping of the steel cable 3000. Under the action of the first elastic member 31, the sliding housing 3 moves upward until its bottom surface stops at the bottom end of the fixing seat 2. During the process, the sliding housing 3 stops at the driving rod 71, and the sliding housing 3 overcomes the elastic force of the second elastic member 74 to push the driving rod 71 to move upward and reset. The driving rod 71 drives the driving ring 72 to reset through the driving gear 73, and the driving ring 72 is disengaged from the cleaning rod 6. Under the action of the reset spring 75, the cleaning rod 6 is retracted into the matching ring 5, thereby disengaging from the steel cable 3000. When the driving rod 71 moves upward, it will drive the oil storage ring 121 to move upward, so that the oil storage ring 121 is retracted into the annular cavity, so that the brush 122 is disengaged from the steel cable 3000.

[0059] The construction method of the bridge construction hoist according to the embodiment of the present invention is applied to the bridge construction hoist according to the embodiment of the present invention, and comprises the following steps:

[0060] The first step is to set up the base and cement mixing piles on the ground. The diameter of the cement mixing piles is 50 cm, the pile spacing is 1.3 meters, and the pile length is 20 meters. A cast-in-place concrete foundation is used between the lifting station and the cement mixing piles to transfer the load to the pile body. There are 4 cement mixing piles under each concrete foundation, and the mixing piles extend 20 cm into the concrete foundation.

[0061] The second step is to install the base of the support frame 1000. The columns are hoisted one by one using external hoists. The hoist is divided into two standard sections. A single column is about 15 meters long. The bottom of the first section of the column is firmly connected to the concrete foundation through pre-buried anchor bolts and connected to each other through pull rods. When installing the first section of the column, the second section of the column and the pull rod are synchronously assembled on the ground to complete the frame.

[0062] The third step is to install the lifting platform 2000. When installing the first section of the elevator, install the guide rail on the column. After the first section is installed, assemble the lifting platform 2000 on the guide rail and install the side rails, insurance, top net, docking device, discharge port, feed door and outer door in sequence according to the direction.

[0063] The fourth step is to install the elevator standard section, fix the guide wheel and cleaning component 5000 on the elevator standard section, then hoist the assembled elevator standard section above the elevator first section, and fix the elevator standard section and the elevator first section together by tightening bolts.

[0064] The fifth step is to set up the winch 4000 and the steel cable 3000, fix the winch 4000 next to the support frame 1000, wrap one end of the steel cable 3000 around the winch 4000, and pass the other end of the steel cable 3000 around the guide wheel and through the cleaning component 5000, and then fixedly connected to the lifting platform 2000.

[0065] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hoist for bridge construction, comprising: Support frames, lifting platforms, cables and winches; The support frame is supported on the foundation, the winch is arranged beside the support frame, and the lifting platform is slidably fitted in the support frame, one end of the steel cable is wound around the winch, and the other end passes through the guide wheel and is connected to the lifting platform; it is characterized in that a cleaning component is also provided, the cleaning component comprises a mounting seat, a fixed seat, a sliding shell, a detection rod and a cleaning rod, the mounting seat is arranged on the support frame, the fixed seat is annular and fixed on the mounting seat, the steel cable passes through the fixed seat, a matching ring is rotatably fitted on the fixed seat, a plurality of cleaning rods are spaced apart on the matching ring and slidably fitted with the matching ring, the cleaning rod can extend into the gap of the side wall of the steel cable, a driving mechanism is provided on the fixed seat, the driving mechanism is used to drive the cleaning rod to move, the detection rod is slidably fitted in the fixed seat and frictionally fitted with the steel cable, the sliding shell is slidably fitted on the mounting seat and is connected to the mounting seat by a first elastic member, the detection rod can push the sliding shell to move downward, thereby separating the sliding shell from the fixed seat, and thus enabling the driving mechanism to operate; The driving mechanism includes a driving rod, a driving ring, and a driving gear. The driving rod is slidably fitted in a fixing seat and connected to the fixing seat via a second elastic member. The driving rod can extend from the fixing seat and can abut against the sliding housing. The driving ring is slidably fitted in the fixing seat and is spaced apart from the driving rod. The driving ring can abut against the cleaning rod. The driving gear is provided between the driving rod and the driving ring and meshes with the driving rod and the driving ring respectively. The cleaning rod is connected to the matching ring via a return spring. The fixing seat is further provided with a heater, the sliding housing is provided with a sensor, the detection rod can abut against the sensor, so that the sensor sends an electrical signal, and the heater can receive the electrical signal, thereby heating the steel cable; If there is a part of the steel cable that is insufficient in lubricating oil, when this part of the steel cable contacts the detection rod, due to the lack of lubricating oil, the steel cable drives the detection rod to move downward under the action of friction, and the detection rod squeezes the sensor and drives the sliding housing to move downward to overcome the elastic force of the first elastic member, so that the sliding housing and the steel cable move downward synchronously; When the sliding shell moves downward, the sliding shell disengages from the driving rod, and the driving rod moves downward under the action of the second elastic member, and drives the driving ring to move upward through the driving gear. During the upward movement of the driving ring, it will stop with the cleaning rod and push the cleaning rod to overcome the elastic force of the return spring and move radially inward along the fixed seat, so that the cleaning rod extends out of the mating ring until the cleaning rod extends into the gap of the steel cable.

2. The bridge construction hoist according to claim 1, characterized in that: The mating ring is provided with a plurality of suction holes spaced apart along its circumference, an annular passage is provided in the fixing seat, the annular passage is connected with each of the suction holes, and a sewage pipe is also provided on the fixing seat, one end of the sewage pipe is connected with the annular passage, and the other end thereof is connected with an external pump.

3. The bridge construction hoist according to claim 2, characterized in that: The end surface of the detection rod has an inwardly recessed arc groove, and the arc groove can be in close contact with the steel cable.

4. The bridge construction hoist according to claim 3, characterized in that: The sliding shell is provided with a clamping mechanism, and the two clamping mechanisms are respectively provided at the upper and lower ends of the sliding shell, and the clamping mechanism includes a rotating ring, a first clamping block, a second clamping block and an electric push rod. The rotating ring is rotatably fitted on the sliding shell, and a driving member is provided in the sliding shell, and the driving member is used to drive the rotating ring to rotate. The first clamping block and the second clamping block are both slidably fitted on the rotating ring, and the two are symmetrically distributed about the center of the rotating ring. There are two electric push rods, both provided on the rotating ring, and the two electric push rods are respectively connected to the first clamping block and the second clamping block. The first push rod pushes the first clamping block and the second clamping block close to each other, so that the steel cable can be clamped.

5. The bridge construction hoist according to claim 4, characterized in that: An oil storage ring is provided on the fixing seat, the interior of the oil storage ring is hollow, an oil delivery pipe is provided on the oil storage ring, the oil delivery pipe is connected to the external oil tank, a brush is provided on the oil storage ring, lubricating oil is stored in the oil storage ring, the lubricating liquid can penetrate into the brush, and the brush can stop the steel cable.

6. The bridge construction hoist according to claim 5, characterized in that: The support frame is composed of a plurality of columns and pull rods, and the height of the support frame can be changed according to needs.

7. A construction method for a bridge construction hoist, applied to the bridge construction hoist according to claim 6, characterized in that: The method comprises the following steps: first, setting a base, setting a plurality of cement mixing piles on the ground at the position of the hoist platform, and setting a concrete foundation on the cement mixing piles; The second step is to install the first section of the hoist, and use external lifting equipment to lift the columns one by one. The bottom end of the first section of the column is firmly connected to the foundation through pre-buried anchor bolts; the third step is to install the lifting platform, install the guide rail on the support frame, and slide the lifting platform on the guide rail; the fourth step is to install the standard section of the support frame. The standard section of the support frame and the lifting platform are installed simultaneously. First, install the vertical poles, horizontal rods, and diagonal rods to form a frame structure on the base of the support frame. Install the guide wheel while installing the lifting platform; the fifth step is to set up the winch and steel cable. The winch is fixed on a flat and solid foundation and needs to be away from the dangerous working area. Wrap one end of the steel cable around the winch, and the steel cable passes around the guide wheel and is fixedly connected to the lifting platform.

8. The construction method of a bridge construction hoist according to claim 7, characterized in that: In the fourth step, multiple cleaning components are installed on the top of the support frame, and each steel cable passes through the corresponding cleaning component and is connected to the lifting platform.

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