CN217350544U - Lifting jack - Google Patents

Abstract

The utility model discloses a lifting jack, which relates to the technical field of prestress and comprises an upper bracket, an upper automatic tool anchor, a jack, a lower bracket and a lower automatic tool anchor, wherein a cylinder body of the jack is connected with the bottom end of the upper bracket and the top end of the lower bracket; the upper automatic tool anchor is connected with the jack piston, and an upper rotation stopping device is arranged on a base of the upper automatic tool anchor; a guide plate is arranged above the upper bracket; the lower automatic tool anchor is arranged on the lower bracket base; the bottom of the lower bracket base is provided with a lower rotation stopping device; the jack is internally sleeved with a guide cylinder, and the outer side of the jack is also provided with a displacement sensor assembly and a balance valve. The utility model discloses can solve current promotion jack clamping piece and move back anchor card and pause unsmooth, clamping piece centre gripping unevenness, stop down that the device change is with high costs, change inconveniently, because of the rotatory steel strand wires that has damage, jack damage, clamping piece, spring holder, push pipe, jack internal guide section of thick bamboo subassembly damage etc. of automatic tool anchor in the rotatory drive of steel strand wires atress.

Description

Lifting jack

Technical Field

The utility model belongs to the technical field of the prestressing force construction technique and specifically relates to a jack that is arranged in the large-scale structural component of prestressing force construction translation, jack-up, transfers the heavy object.

Background

In the existing lifting jack, a spring pressing plate of an automatic anchor is not provided with a spring seat limiting plate, the pressure of each spring seat is unbalanced, the spring pressing plate presses clamping pieces of the automatic tool to be uneven sometimes, and the three clamping pieces are stressed at different times and cannot clamp a steel strand and retreat from the anchor and clamp;

on the other hand, the rotation stopping device of the lifting jack is arranged below the base, but the steel strand in the lifting jack has torsion, when the upper automatic anchor rotates along with the torsion direction of the steel strand in the operation process of the lifting jack, the steel strand is twisted together, and the rotation of the steel strand can damage the parts such as the lifting jack, an automatic tool clamping piece, a spring seat, a jacking pipe, a guiding cylinder in the lifting jack and the like;

the lower rotation stopping device and the base in the lifting jack are integrally manufactured, and the lower rotation stopping device and the base are replaced simultaneously after being damaged, so that the replacement is inconvenient and the replacement cost is high.

In addition, the existing lifting jack is connected with a jack displacement sensor instead of a rod end radial spherical plain bearing, and the jack displacement sensor is easily damaged due to the fact that installation errors and machining errors exist in the installation process, and therefore the displacement sensor is vertically connected with different axis errors.

In addition, the existing automatic anchor is only provided with a travel switch and is not provided with a displacement sensor, when a steel strand is penetrated at high altitude, the conditions that the penetration of the steel strand is not smooth and the like caused by the fact that the automatic tool anchor is opened to a free clamping state and the steel strand is penetrated through the automatic tool anchor are not ensured, and the safety is low when the automatic tool anchor is controlled to clamp.

In addition, the existing distance measuring instrument for the steel strand on the hoisting top can only calculate the hoisting or lowering distance through the accumulated hoisting times of the hoisting top stroke, when the automatic tool anchor is in the process of excessive conversion and the accumulated distance error of the movement of the steel strand in the clamping piece clamping and stressing process, the accumulated error is increased along with the increasing or lowering distance, so that the actual height of each hoisting point cannot be ensured, the heavy object is difficult to ensure to be in a horizontal state in the hoisting or lowering process, the height (position) of the heavy object in real time cannot be measured, and the height and the horizontal condition of the heavy object need to be measured by other instruments after the heavy object is hoisted for a certain height every time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a promote jack is provided, it can solve the clamping piece and move back the anchor card and dun unsmooth, clamping piece centre gripping unevenness, stop the device change with high costs down, change inconvenient, damage a great deal of problems such as guide cylinder subassembly damage in rotatory existence of automatic tool anchor along with driving in the steel strand wires atress is rotatory because of the steel strand wires atress.

In order to solve the above problem, the technical scheme of the utility model is that: the lifting jack comprises an upper support, an upper automatic tool anchor, an upper rotation stopping device, a jack, a lower support, a lower automatic tool anchor, a lower rotation stopping device, a guide plate, a guide cylinder and a lower support base, wherein the top end of a cylinder body of the jack is connected with the bottom end of the upper support through an upper support lower plate, and the bottom end of the cylinder body of the jack is connected with the top end of the lower support through a lower support upper plate; the upper automatic tool anchor is connected with the piston of the jack through an automatic anchor buckle, and the upper rotation stopping device is connected with the base of the upper automatic tool anchor, sleeved on the upper support column of the upper support and moves up and down along with the upper automatic tool anchor; the guide plate is arranged above the upper bracket; the bottom end of the lower bracket is connected with the lower bracket base, and the lower automatic tool anchor is arranged on the lower bracket base; the lower rotation stopping device is arranged in the center of the lower bracket base; the guide cylinder is sleeved in the jack; the outer side of the jack is also provided with a displacement sensor assembly and a balance valve; automatic tool anchor sensor assemblies are arranged on the outer sides of the upper automatic tool anchor and the lower automatic tool anchor; and a distance measuring device is arranged on the lower bracket.

In the above technical solution, a more specific solution is: the upper automatic tool anchor and the lower automatic tool anchor have the same structure and comprise clamping pieces, an anchorage device, an anchor withdrawing piston, a jacking pipe, a clamping piece top plate fixing plate, a top plate, a limiting plate, a spring seat, a spring pressing plate, a spring, an anchor withdrawing oil cylinder and a tool anchor base;

the top pipe penetrates through the anchorage device, the bottom end of the top pipe is installed on the top plate and fixed by the top plate fixing plate, the top end of the top pipe is a conical surface, the small end surface hole of the clamping piece is a conical surface, the small end conical surface of the clamping piece is matched with the top end of the top pipe, the clamping piece is embedded in the anchor device conical hole, the large end surface of the clamping piece is also a conical surface, the bottom end surface of the spring seat is a cone, the conical surface at the bottom end of the spring seat is contacted with the large end surface of the clamping piece, the spring is sleeved in the spring seat, the spring pressing plate presses the spring, the spring seat is embedded in the through hole of the spring pressing plate, the limiting plate is fixed on the spring pressing plate, when the clamping piece of the automatic tool is jacked open by the jacking device, under the action of the clamping piece jacking device and the clamping piece pressing device, the jacking pipe and the spring seat form two umbrella tops to expand the clamping piece of the automatic tool, and then the top pipe, the automatic tool clamping piece and the spring seat are automatically aligned on the same axis, and the steel strand is smoothly threaded. The joint of a threaded hole at the large end of the clamping piece of the automatic tool and the internal threaded hole is rounded off, the side surface of the large end of the clamping piece of the automatic tool is provided with a circular groove, namely a hooping groove, and the clamping piece is hooped into a whole through a 0-shaped ring, so that the clamping piece can be conveniently tracked and positioned; the anchorage device, the anchor withdrawing piston and the tool anchor base are connected together by an automatic anchor inner hexagonal screw rod, and the top plate is connected with the lower end of the anchor withdrawing oil cylinder by a top plate screw rod and is fixed by a top plate screw rod nut; and an automatic anchorage buckle is arranged at the bottom end of the tool anchor base.

Further: the range finder comprises a transmission shaft, a fixed block, a tension spring, an encoder, a link plate and a synchronizing wheel; the transmission shaft is sleeved in the fixed block and fixed on the small end of the link plate, the fixed block is fixed on the inner side of the upper plate of the lower support, the encoder is fixed on the large end of the link plate, the rotating shaft of the encoder penetrates through the link plate to be linked with the synchronizing wheel, one end of the tensioning spring is fixed on the transmission shaft, the other end of the tensioning spring is fixed on the large end of the link plate and used for ensuring that the synchronizing wheel always rotates when pressing the steel strand, the distance meter measures the moving distance of the steel strand so as to ensure that the actual height (position) of a heavy object and the real-time height of each lifting point are measured in real time, and when each lifting point exceeds the designed deviation height, the control system can automatically adjust the height of each lifting point, so that the heavy object is always in a horizontal state.

Further: the upper rotation stopping device comprises a sliding block, a clamping plate and a shifting fork; the sliding block is sleeved on one upper supporting column of the upper support, and the shifting fork is fixed on the tool anchor base and sleeved in the sliding block; the clamping plates are arranged on two sides of the sliding block.

Further: the lower rotation stopping device is a circular plate, the middle part of the circular plate is provided with a plurality of round holes for the steel strands to pass through, the hardness of the circular plate after heat treatment is HRC40-45, the circular plate is wear-resistant, and the circular plate is connected with the lower bracket base through bolts.

Further: the displacement sensor assembly comprises an upper rod end radial spherical plain bearing, a displacement sensor and a lower rod end radial spherical plain bearing; the upper rod end radial spherical plain bearing is connected with a sliding block of the upper rotating device, the displacement sensor is installed between the upper rod end radial spherical plain bearing and the lower rod end radial spherical plain bearing, the lower rod end radial spherical plain bearing is connected with a fixing ring of the displacement sensor, and the fixing ring of the displacement sensor is sleeved on one lower support column of the lower support.

Further: the automatic tool anchor sensor assembly comprises an anchor device displacement baffle arranged in a line concentration box of the anchor device sensor assembly, an automatic anchor device tightening in-place sensor, an automatic anchor device loosening in-place sensor, an automatic anchor displacement sensor, a sensor induction piece and a sensor pull rod;

the automatic anchor displacement sensor is sleeved on the sensor pull rod and is arranged in the middle of the sensor assembly line concentration box; the automatic anchorage device tight-in-place sensor is arranged on the left side of the automatic anchorage device displacement sensor, and the automatic anchorage device loosening-in-place sensor is arranged on the right side of the automatic anchorage device displacement sensor; the sensor induction sheet is arranged at the upper end of the sensor pull rod, the upper end contact sheet is positioned above the automatic anchorage loosening in-place sensor, and the lower end contact sheet is positioned below the automatic anchorage tightening in-place sensor; one end of the sensor pull rod extends out of the sensor assembly wire collecting box, the bottom end of the sensor pull rod is located above the anchor device displacement baffle, the anchor device displacement baffle is installed on the outer side of the automatic tool anchor base and used for blocking the sensor pull rod to ensure that the sensor pull rod does stretching and contracting movement along with the loosening and tightening of the automatic tool anchor so as to drive the sensor induction piece to move up and down, the sensor induction piece is installed at the upper end of the displacement sensor pull rod, when the automatic tool anchor is loosened, the automatic tool displacement baffle blocks the pull rod, the automatic anchor displacement sensor is upward along with the loosening of the automatic tool anchor, and the sensor induction piece is downward along with the pull rod so as to touch the automatic anchor device to loosen the in-place sensor, so that the sensor induces the loosening in-place display; when the automatic tool is anchored tightly, the automatic tool displacement baffle blocks the pull rod, the automatic anchor displacement sensor is downward along with the automatic tool anchoring, the sensor induction piece is upward along with the pull rod to touch the automatic tool anchoring in-place sensor, so that the sensor is tightly induced to display in-place, and the automatic anchor displacement sensor is installed in the middle of the wire collecting box and used for measuring the travel of the automatic tool anchor.

Due to the adoption of the technical scheme, compared with the prior art, the utility model following beneficial effect has:

1. the utility model discloses a spring holder limiting plate is installed to the spring plate of automatic anchor, ensure that every spring support receives the pressure atress balanced, the big terminal side processing of automatic tool clamping piece has a ring groove, cramp the groove promptly, hoop into a whole through 0 type ring, do benefit to the clamping piece and follow-up and fix a position, thereby solved the spring holder and pressed the unevenness to automatic tool anchor clamping piece, every spring holder receives the pressure unbalance, there is spring plate to press not three clamping pieces atress clamp steel strand wires not simultaneously to the clamping piece sometimes, move back anchor card and pause not in the same direction as the scheduling problem.

2. The utility model discloses an go up automatic anchor and install the spline device, prevent because of steel strand wires torsion is big, go up the rotatory condition of automatic anchor and appear, the device also can be used for fixed jack displacement sensor and sensor slider to use simultaneously.

3. The utility model discloses a device that splines down installs on the base of lower carriage bottom, and the base is not an organic whole with the lower carriage, ensures to damage because of the device that splines down and changes, quick detachable and change, only need change under spline the device can, the cost of change significantly reduces.

4. The utility model discloses a balanced valve ensures that the functioning speed who makes the pneumatic cylinder does not receive the influence that the load changes, and the heavy object free fall when also can prevent that the pipeline from damaging or the braking is malfunctioning to avoid the accident.

5. The utility model discloses the connection of both ends is with rod end radial spherical plain bearing about the jack displacement sensor, prevents that displacement sensor operation in-process from damaging simple to operate because of upper and lower disalignment.

6. The utility model discloses an automatic anchor is provided with sensor assembly, travel switch to when having solved when wearing steel strand wires at the high altitude, when the free clamping state was opened to the automatic instrument anchor, opened and smoothly penetrated steel strand wires, the clamping piece can one-way locking steel strand wires, the sensor assembly constitutes ground tackle position state feedback with the travel switch two, thereby improves control system reliability.

7. The utility model discloses be provided with steel strand wires distancer, can measure the actual height of heavy object often, and also the actual height of every hoisting point often ensures to be in under the horizontally state promoting or the in-process heavy object of transferring to solved every hoisting point height difference that promotes the process heavy object, the condition of the heavy object unbalance loading that exists, the often height of the unable definite heavy object, all need stop after promoting the take off at every turn and measure the height and the horizontal condition scheduling problem of heavy object with other instruments.

Drawings

FIG. 1 is a schematic side view of the three-dimensional structure of the present invention;

FIG. 2 is a schematic side elevational view of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic view of the upper and lower automatic tool anchors of the present invention;

FIG. 5 is a schematic front view of the upper rotation stopping device of the present invention;

FIG. 6 is a schematic top view of the upper rotation stopping device of the present invention;

FIG. 7 is a left side view of the upper rotation stopping device of the present invention;

fig. 8 is a schematic view of the installation position of the middle stop device according to the present invention;

FIG. 9 is a schematic view of the bottom bracket base and the middle bottom rotation stopping device of the present invention;

FIG. 10 is a schematic cross-sectional view of the rotation stopping device and the lower stand base of the present invention;

fig. 11 is a schematic structural view of a jack displacement sensor assembly according to the present invention;

fig. 12 is a schematic view of the mounting position of the automatic anchor sensor assembly of the present invention;

fig. 13 is a schematic front view of an automatic anchor sensor assembly according to the present invention;

fig. 14 is a schematic top view of an automatic anchor sensor assembly according to the present invention;

fig. 15 is a left side view of the automatic anchor sensor assembly of the present invention;

fig. 16 is a right-view schematic diagram of the automatic anchor sensor assembly according to the present invention;

fig. 17 is a schematic perspective view of the distance measuring device of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and examples:

the lifting jack of fig. 1, 2 and 3 comprises a guide plate chuck 20, a guide plate bottom plate 21, an upper bracket 31, an upper automatic tool anchor 23, an upper rotation-stopping device 24, an upper bracket lower plate 25, a jack 26, a lower bracket 27, a lower automatic tool anchor 28, a lower rotation-stopping device 29, a guide plate 30, a displacement sensor assembly 32, a guide cylinder 33, a lower bracket upper plate 34, a lower bracket base 36 and a guide sleeve fixing plate 41;

the upper bracket 31 comprises 5 upper support columns 22, and the lower bracket 27 comprises 5 lower support columns 35; the jack 26 is installed between the upper bracket lower plate 25 at the bottom of the upper bracket 31 and the lower bracket upper plate 34 at the top of the lower bracket 27; the inner side of the lower bracket upper plate 34 is connected with a distance measuring device 43;

the upper automatic tool anchor 23 is connected with a piston of the jack 26 through an automatic anchor buckle, a guide cylinder 33 is sleeved in the jack 26, and two ends of the guide cylinder 33 are fixed by a guide sleeve fixing plate 41; the displacement sensor assembly 32 and the hydraulically controlled balance valve 38 are arranged outside the jack 26; the balance valve 38 is mounted on a valve seat 39, the valve seat 39 is mounted on the cylinder body of the jack 26, two ends of the valve seat 39 are respectively connected with the rodless oil chamber 40 and the rod oil chamber 37, and the hydraulically-controlled balance valve 38 is communicated with the hydraulic loop of the jack and the pump station.

The upper rotation stopping device 24 is installed on the base of the upper automatic tool anchor 23 and sleeved on an upper supporting column 22 in the upper bracket 31 to move up and down along with the upper automatic tool anchor 23; the guide plate 30 is arranged above the middle part of the guide plate bottom plate 21 and is fixedly arranged on the guide plate bottom plate 21 by the guide plate chuck 20, and the guide plate bottom plate 21 is connected with the top end of the upper bracket 31; the bottom end of the lower bracket 27 is connected with a lower bracket base 36, and the top end of the lower bracket 27 is connected with the bottom end of the jack 26; the lower robotic tool anchor 28 is mounted on the base 36; the lower rotation stopping device 29 is fixedly arranged in the middle of the lower bracket base 36 through bolts; an automatic tool anchor sensor assembly 42 is disposed outside of both the upper automatic tool anchor 23 and the lower automatic tool anchor 28.

The upper automatic tool anchor 23 and the lower automatic tool anchor 28 have the same structure, and as shown in fig. 4, comprise a limiting plate backing plate 1, a spring plate screw nut 2, a spring plate screw 3, a clamping piece 4, an anchorage device 5, an anchor withdrawing piston 6, a jacking pipe 7, a clamping piece top plate fixing plate 8, a top plate 9, an automatic anchorage device buckle 10, a limiting plate 11, a spring seat 12, a spring pressing plate 13, a spring 14, an automatic anchor hexagon socket head cap screw 15, an anchor withdrawing oil cylinder 16, a top plate screw 17, a top plate screw nut 18 and a tool anchor base 19;

the top pipe 7 penetrates through the anchorage device 5, the bottom end of the top pipe 7 is installed on the top plate 9 and is fixed by the top plate fixing plate 8, and the top end of the top pipe 7 is a conical surface; the small end surface orifice of the clamping piece 4 is also inverted into a conical surface, the small end of the clamping piece 4 is matched with the top end of the top pipe 7, the clamping piece 4 is embedded in the through hole of the anchorage device 5, and the large end surface orifice of the clamping piece 4 is also inverted into a conical surface; the lower end surface of the spring seat 12 is an umbrella top, the end surface is also inverted into a conical surface, and the umbrella top is abutted against the large end of the clamping piece 4; the spring 14 is sleeved in the spring seat 12, the spring pressing plate 13 presses the spring 14, the spring seat 12 is embedded in a through hole of the spring pressing plate 13, the limiting plate 11 is fixed on the spring pressing plate 13, when the automatic tool clamping piece is ejected by the ejecting device, the ejecting pipe 7 and the spring seat 12 form two umbrella tops to expand the self-power tool clamping piece 4 under the action of the clamping piece ejecting device and the clamping piece pressing device, at the moment, the ejecting pipe, the automatic tool clamping piece and the spring seat are automatically aligned on the same axis, and the strand steel strand is smoothly threaded. The joint of a threaded hole at the large end of the clamping piece 4 and an internal threaded hole is rounded off, the side surface of the large end of the automatic tool clamping piece 4 is provided with an annular groove, namely a hooping groove, and the annular groove is hooped into a whole through a 0-shaped ring, so that the clamping piece can be conveniently followed and positioned, and the spring pressing plate 13 is connected with the upper end of the anchor withdrawing oil cylinder 16 through a spring pressing plate screw rod 3 and is fixed through a spring pressing plate screw rod nut 2; the anchorage device 5, the anchor withdrawing piston 6 and the tool anchor base 19 are connected together by an automatic anchor inner hexagonal screw 15; the top plate 9 is connected with the lower end of the anchor withdrawing oil cylinder 16 by a top plate screw rod 17 and is fixed by a top plate screw rod nut 18; the bottom end of the tool anchor base 19 is provided with an automatic anchor clamp 10. The automatic anchor buckle 10 of the upper automatic tool anchor 23 clamps the upper automatic tool anchor to the piston of the jack 26; and the automatic anchor snap 10 of the lower automatic tool anchor 28 snaps the lower automatic tool anchor to the base 36.

As shown in fig. 5, 6, 7 and 8, the upper stopping device 24 includes a slider 24-1, a catch plate 24-2 and a fork 24-3; the sliding block 24-1 is sleeved on one upper supporting column 22 of the upper support 31, the shifting fork 24-3 is fixed on the tool anchor base 19 and sleeved on the sliding block 24-1, and the clamping plates 24-2 are arranged on two sides of the sliding block 24-1.

As shown in fig. 9 and 10, the lower rotation stopping device 29 is a circular plate with a plurality of circular holes formed in the middle for allowing the steel strands to pass through, and the hardness of the circular plate after heat treatment is HRC40-45, so that the abrasion resistance is improved, and the circular plate is fixedly mounted in the center of the lower bracket base 36 through bolts.

As shown in FIG. 11, the displacement sensor assembly 32 includes an upper rod end spherical plain bearing 32-1, a displacement sensor 32-2 and a lower rod end spherical plain bearing 32-3; the upper rod end radial spherical plain bearing 32-1 is connected with a sliding block 24-1 of the upper rotating device 24, the displacement sensor 32-2 is installed between the upper rod end radial spherical plain bearing 32-1 and the lower rod end radial spherical plain bearing 32-3, the lower rod end radial spherical plain bearing 32-3 is connected with a fixing ring of the displacement sensor, and the fixing ring of the displacement sensor is sleeved on a lower supporting column 35 of the lower support 27; the upper end and the lower end of the displacement sensor 32-2 are connected by adopting a rod end radial spherical plain bearing, so that the damage caused by the fact that the upper end and the lower end of the displacement sensor are not aligned to the center in the operation process can be effectively prevented, the installation is convenient, and the displacement sensor assembly 32 is used for measuring the walking stroke of the jack.

The upper and lower automatic tool anchor sensor assemblies 42 disposed outside the upper automatic tool anchor 23 and the lower automatic tool anchor 28 have the same structure, as shown in fig. 12, 13, 14, 15 and 16, and include an anchor displacement baffle 42-1 installed in an anchor sensor assembly cluster 42-6, an automatic anchor tightening in-place sensor 42-2, an automatic anchor loosening in-place sensor 42-3, an automatic anchor displacement sensor 42-4, a sensor sensing piece 42-5 and a sensor pull rod 42-7;

the automatic anchor displacement sensor 42-4 is sleeved on the sensor pull rod 42-7 and is arranged in the middle of the sensor assembly line concentration box 42-6; an automatic anchorage tight-in-place sensor 42-2 is arranged on the left side of the automatic anchorage displacement sensor 42-4, and an automatic anchorage loose-in-place sensor 42-3 is arranged on the right side of the automatic anchorage displacement sensor 42-4; the sensor induction sheet 42-5 is arranged at the upper end of the sensor pull rod, the contact sheet at the upper end is positioned above the automatic anchorage loosening in-place sensor 42-3, and the contact sheet at the lower end is positioned below the automatic anchorage tightening in-place sensor 42-2; one end of the sensor pull rod 42-7 extends out of the sensor assembly line concentration box 42-6 and is positioned above the anchor device displacement baffle 42-1, the anchor device displacement baffle 42-1 is arranged at the outer side of the automatic anchor device base 19, used for blocking the sensor pull rod 42-7 and ensuring the sensor pull rod 42-7 to do stretching and contracting movement along with the tightness of the automatic tool anchor, thereby driving the sensor induction sheet 42-5 to move up and down, the sensor induction sheet 42-5 is arranged at the upper end of the pull rod of the displacement sensor, when the automatic tool anchor is loosened, the automatic tool displacement baffle 42-1 blocks the pull rod, the automatic anchor displacement sensor 42-4 is upward along with the loosening of the automatic tool anchor, and the sensor induction sheet 42-5 is downward along with the pull rod so as to touch the automatic anchor loosening in-place sensor 42-3, so that the sensor induces the loosening in-place display; when the automatic tool is anchored tightly, the automatic tool displacement baffle 42-1 blocks the pull rod, the automatic anchor displacement sensor 42-4 is downward along with the anchoring of the automatic tool, the sensor induction sheet 42-5 is upward along with the pull rod so as to touch the automatic tool anchoring in-place sensor 42-2, so that the sensor induces the tight in-place display, and the automatic anchor displacement sensor 42-4 is arranged in the middle of the wire collecting box 42-6 and is used for measuring the walking stroke of the automatic tool anchor.

As shown in FIG. 17, the distance measuring device 43 includes a transmission shaft 43-1, a fixed block 43-2, a tension spring 43-3, an encoder 43-4, a link plate 43-5, and a synchronizing wheel 43-6;

the transmission shaft 43-1 is sleeved in the fixed block 43-2 and fixed on the small end of the link plate 43-5, the fixed block 43-2 is fixed on the inner side of the lower bracket upper plate 34, the encoder 43-4 is fixed on the large end of the link plate 43-5, the rotating shaft of the tension spring passes through the linking plate 43-5 to be linked with the synchronizing wheel 43-6, one end of the tension spring is fixed on the transmission shaft 43-1, the other end is fixed on the big end of the linking plate 43-5, for ensuring that the synchronizing wheel 43-6 is always in motion for pressing the steel strand to rotate, the distance measuring device 43 measures the distance of the steel strand motion, so as to ensure that the actual height (position) of the heavy object and the real-time height of each lifting point are measured all the time, when the lifting points exceed the design deviation height, the control system can automatically adjust the height of each lifting point, so that the heavy object is always in a horizontal state.

Use the utility model discloses the time, promote operating mode state: pressure oil is supplied to a jack 26 through a hydraulic pump station, a jack piston is pushed to do stretching and contracting cylinder motion, an upper automatic tool anchor 23 arranged at the top end of the piston clamps a bearing steel strand when the cylinder is stretched, so that a lifting weight moves upwards along with the upper automatic tool anchor, a lower automatic tool anchor 28 connected with a lower bracket base 36 clamps the bearing steel strand when the cylinder is contracted, so that the lifting weight is guaranteed to be safely and reliably stopped at a new position, meanwhile, the upper automatic tool anchor 23 arranged at the top end of the piston loosens the bearing steel strand, and the piston return stroke is ready for lifting of the next stroke; in the descending working condition state: the piston of the jack 26 is at a position nearly extending the cylinder completely, the upper automatic tool anchor 23 clamps the bearing steel strand, the lower automatic tool anchor 28 loosens the bearing steel strand, and the piston retracts the cylinder to drive the heavy object to descend. And (3) clamping the bearing steel strand by the lower automatic tool anchor 28 at a position close to the fully contracted cylinder, releasing the piston no-load extension cylinder of the jack 26 after the bearing steel strand by the upper automatic tool anchor 23, clamping the bearing steel strand again by the upper automatic tool anchor 23 at a position close to the fully extended cylinder, releasing the bearing steel strand by the lower automatic tool anchor 28, and sequentially circulating the steps until the heavy object is accurately positioned at the designed position. Hydraulic control balance valves, namely a balance valve 38, are also arranged on hydraulic loops of the hydraulic jacks and the pump station, and the hydraulic control balance valves can lock the oil loops in emergencies such as sudden power failure and the like, so that lifting heavy objects are safely suspended at a preset height.

Claims (7)

1. The utility model provides a lifting jack, includes the upper bracket, goes up automatic tool anchor, goes up the device that splines, jack, lower carriage, automatic tool anchor down, splines device, deflector, guide cylinder and lower carriage base down, its characterized in that: the top end of a cylinder body of the jack is connected with the bottom end of the upper bracket, and the bottom end of the cylinder body of the jack is connected with the top end of the lower bracket; the upper automatic tool anchor is connected with a piston of the jack, and the upper rotation stopping device is connected with a base of the upper automatic tool anchor, sleeved on an upper supporting column of the upper support and moves up and down along with the upper automatic tool anchor; the guide plate is arranged above the upper bracket; the bottom end of the lower bracket is connected with the lower bracket base, and the lower automatic tool anchor is arranged on the lower bracket base; the lower rotation stopping device is arranged in the center of the lower bracket base; the guide cylinder is sleeved in the jack; a displacement sensor assembly and a balance valve are further arranged on the outer side of the jack; automatic tool anchor sensor assemblies are arranged on the outer sides of the upper automatic tool anchor and the lower automatic tool anchor; and a distance measuring device is arranged on the lower bracket.

2. A lifting jack as claimed in claim 1 wherein: the upper automatic tool anchor and the lower automatic tool anchor have the same structure and comprise automatic tool clamping pieces, an anchorage device, an anchor withdrawing piston, a jacking pipe, a clamping piece top plate fixing plate, a top plate, a limiting plate, a spring seat, a spring pressing plate, a spring, an anchor withdrawing oil cylinder and a tool anchor base;

the top end of the top pipe is a conical surface, the small end surface orifice of the automatic tool clamping piece is also inverted into a conical surface, the small end of the automatic tool clamping piece is matched with the top end of the top pipe, the automatic tool clamping piece is embedded in the anchor through hole, and the large end surface orifice of the automatic tool clamping piece is also inverted into a conical surface; the lower end surface of the spring seat is an umbrella top, the end surface of the spring seat is also inverted into a conical surface, and the umbrella top of the spring seat is abutted against the large end of the automatic tool clamping piece; the spring is sleeved in the spring seat, the spring pressing plate presses the spring, the spring seat is embedded in the through hole of the spring pressing plate, and the limiting plate is fixed on the spring pressing plate; the spring pressing plate is connected with the upper end of the anchor withdrawing oil cylinder through a spring pressing plate screw rod and is fixed through a spring pressing plate screw rod nut; the anchorage device, the anchor withdrawing piston and the tool anchor base are connected together by an automatic anchor inner hexagonal screw rod; the top plate is connected with the lower end of the anchor withdrawing oil cylinder through a top plate screw rod and is fixed through a top plate screw rod nut; the bottom end of the tool anchor base is provided with an automatic anchor fastener.

3. A lifting jack as claimed in claim 2 wherein: the range finder comprises a transmission shaft, a fixed block, a tension spring, an encoder, a link plate and a synchronizing wheel; the transmission shaft is sleeved in the fixed block and fixed on the small end of the link plate, and the fixed block is fixed on the inner side of the upper plate of the lower bracket; the encoder is fixed on the large end of the link plate, and a rotating shaft of the encoder passes through the link plate to be linked with the synchronous wheel; one end of the tensioning spring is fixed on the transmission shaft, and the other end of the tensioning spring is fixed on the large end of the link plate.

4. A lifting jack as claimed in claim 3 wherein: the upper rotation stopping device comprises a sliding block, a clamping plate and a shifting fork; the sliding block is sleeved on one upper supporting column of the upper support, and the shifting fork is fixed on the tool anchor base and sleeved into the sliding block; the clamping plates are arranged on two sides of the sliding block.

5. A lifting jack as claimed in claim 4 in which: the lower rotation stopping device is a circular plate with a plurality of round holes formed in the middle, and the lower rotation stopping device is connected with the lower bracket base through bolts.

6. A lifting jack as claimed in claim 5, wherein: the displacement sensor assembly comprises an upper rod end radial spherical plain bearing, a displacement sensor and a lower rod end radial spherical plain bearing; the upper rod end radial spherical plain bearing is connected with the sliding block of the upper rotating device, the displacement sensor is installed between the upper rod end radial spherical plain bearing and the rod end radial spherical plain bearing, the lower rod end radial spherical plain bearing is connected with a fixing ring of the displacement sensor, and the fixing ring of the displacement sensor is sleeved on a lower support column of the lower support.

7. A lifting jack as claimed in claim 6, wherein: the automatic tool anchor sensor assembly comprises an anchor device displacement baffle arranged in a line concentration box of the anchor device sensor assembly, an automatic anchor device tightening in-place sensor, an automatic anchor device loosening in-place sensor, an automatic anchor displacement sensor, a sensor induction piece and a sensor pull rod;

the automatic anchor displacement sensor is sleeved on the sensor pull rod and is arranged in the middle of the sensor assembly line concentration box; the automatic anchorage device tight-in-place sensor is arranged on the left side of the automatic anchorage device displacement sensor, and the automatic anchorage device loosening-in-place sensor is arranged on the right side of the automatic anchorage device displacement sensor; the sensor induction sheet is arranged at the upper end of the sensor pull rod, the upper end contact sheet is positioned above the automatic anchorage loosening in-place sensor, and the lower end contact sheet is positioned below the automatic anchorage tightening in-place sensor; one end of the sensor pull rod extends out of the sensor assembly line concentration box, the bottom end of the sensor pull rod is positioned above the anchor device displacement baffle, and the anchor device displacement baffle is arranged on the outer side of the automatic anchor handling base.

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