CN218145454U - Trolley hoisting device - Google Patents

Abstract

The utility model discloses a platform truck overhead hoist, it includes: a crane rail; the crane is arranged on the crane rail in a transverse sliding mode; the lifting appliance is connected with the crane and driven by the crane to move, the lifting appliance is provided with a lifting appliance main body, two clamps positioned at two sides of the lifting appliance main body and four target plates symmetrically arranged at the outer sides of the two clamps, and the two target plates positioned at the outer sides of any one clamp are symmetrically arranged at intervals; two pairs of tracks of depositing, it includes that a pair of old platform truck deposits the track and a pair of new platform truck deposits the track, the orbital bottom of depositing of old platform truck is provided with weighing sensor one and a plurality of laser range finder one, and the orbital bottom of depositing of new platform truck is provided with weighing sensor two and a plurality of laser range finder two. The utility model discloses a set up crane, hoist, multiunit laser range finder and weighing sensor, realize the automatic handling process of platform truck.

Description

Trolley hoisting device

Technical Field

The utility model relates to a calcination processing equipment technical field. More specifically, the utility model relates to a platform truck overhead hoist.

Background

The belt type roasting machine is a thermal device for producing pellet materials for a blast furnace, and ensures the operation rate for a roasting system, namely the economic benefit. The trolley, a key component of the equipment, needs to be replaced irregularly, namely needs to be stopped. The machine is stopped and replaced, which is time-consuming and labor-consuming, and the replacement of one trolley needs at least 20 minutes; the replacement process requires manual door opening (track opening), door closing (track closing), and manual operation of the crane positioning trolley; in addition, the production system needs to perform complex thermal operation such as machine speed reduction, machine halt, hot air system adjustment and the like.

In the hoisting process of the manual operation trolley, a hanger needs to be manually clamped on an old trolley and manually transported to the ground; then manually transporting the new trolley to the position above the head rail, and manually aligning the vacant positions left by the old trolley; a new trolley is placed manually, and because the placement area is narrow and small, the trolley is often placed unstably and overturned due to eccentricity, so that repeated alignment is needed or the position of a vacant position is adjusted repeatedly, and a large amount of time is needed; after the trolley is placed, the lifting appliance needs to be manually disassembled, the roasting machine is slowly started at the moment, and the technological thermal system is adjusted to enable the roasting machine to reach a normal production state. The quality of the pellets produced in the process is unstable, the energy of operators is wasted, the costs of fuel, water, electricity, gas, oil and the like are increased, and the yield is reduced.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.

The utility model also aims at providing a platform truck overhead hoist, its automatic handling that can realize new and old platform truck has solved speed reduction, shut down, the productivity reduction scheduling problem that the platform truck caused because of changing during the production of belt roasting machine, has solved the labour cost of maintenance simultaneously.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a trolley hoist including:

a crane rail;

the crane is arranged on the crane rail in a transverse sliding mode;

the lifting appliance is connected with the crane and driven by the crane to move, the lifting appliance is provided with a lifting appliance main body, two clamps positioned on two sides of the lifting appliance main body and four target plates symmetrically arranged on the outer sides of the two clamps, and the two target plates positioned on the outer sides of any one clamp are symmetrically arranged at intervals;

two pairs of tracks of depositing, it includes that a pair of old platform truck deposits the track and a pair of new platform truck deposits the track, the orbital bottom of depositing of old platform truck is provided with weighing sensor one and a plurality of laser range finder one, and the orbital bottom of depositing of new platform truck is provided with weighing sensor two and a plurality of laser range finder two.

Preferably, the novel automatic weighing system further comprises an old trolley placing frame and a new trolley placing frame, the bottom of the old trolley placing frame is provided with a third weighing sensor and a plurality of third laser range finders, and the bottom of the new trolley placing frame is provided with a fourth weighing sensor and a fourth plurality of fourth laser range finders.

Preferably, the third weighing sensor and the fourth weighing sensor are respectively arranged in the middle of the bottoms of the old trolley placing frame and the new trolley placing frame.

Preferably, the old trolley storage track is used for placing the old trolley to be disassembled, and the new trolley storage track is used for placing the new trolley to be loaded.

Preferably, each clamp comprises two groups of semicircular clamping arms matched with wheels of the trolley, and the four groups of clamping arms of the two clamps are respectively matched and clamped on the peripheries of the wheels of the trolley positioned on two sides of the trolley.

Preferably, two target plates on each clamp are positioned between the two sets of clamping arms, and the bottom of each target plate is of an arc-shaped structure.

The crane slides transversely along the crane track to drive the lifting appliance to move transversely, the crane is connected with the lifting appliance through a mechanical arm, and the mechanical arm drives the lifting appliance to move longitudinally.

Preferably, the system also comprises a controller which is respectively connected with the crane, the lifting appliance, the mechanical arm, the first weighing sensor, the first laser distance meters, the second weighing sensor, the second laser distance meters, the third weighing sensor, the third laser distance meters, the fourth weighing sensor and the fourth laser distance meters;

when the controller receives a first weighing sensor to monitor that an old trolley is placed on an old trolley storage track, the controller controls a plurality of first laser distance measuring instruments to measure the distance between a lifting appliance and the old trolley storage track, controls the mechanical arm to drive the lifting appliance to move downwards for a certain distance and stops, controls the lifting appliance to clamp wheels of the old trolley, clamps the first weighing sensor after clamping, confirms that clamping is successful, controls the mechanical arm to drive the lifting appliance to lift, and repeats the action again if clamping is not successful until clamping is successful;

the controller controls the mechanical arm to drive the lifting appliance to lift for a certain distance to stop, the controller controls the crane to slide along the crane rail to drive the lifting appliance to move transversely, the crane stops when moving right above the old trolley placing frame, the plurality of laser distance measuring instruments measure the distance between the lifting appliance and the old trolley placing frame, the mechanical arm is controlled to drive the lifting appliance to descend for a certain distance to stop, the controller controls the lifting appliance to release the old trolley, the weighing sensor measures three after the lifting is released, the successful release is confirmed, the mechanical arm is controlled to drive the lifting appliance to lift, the old trolley is lifted, and meanwhile, the controller reminds the old trolley on the old trolley placing frame to be taken away;

the controller controls the mechanical arm to drive the lifting appliance to lift for a certain distance to stop, when the controller receives a new trolley detected by the weighing sensor IV and a new trolley is placed on the new trolley placing frame, the controller controls the crane to slide along a trolley track to drive the lifting appliance to move transversely, the controller stops when the crane is placed right above the new trolley placing frame, the plurality of laser range finders IV measure the distance between the lifting appliance and the new trolley placing frame, the mechanical arm drives the lifting appliance to descend for a certain distance to stop, the controller controls the lifting appliance to clamp the new trolley, the weighing sensor IV weighs after clamping, clamping is confirmed to be successful, the mechanical arm is controlled to drive the lifting appliance to lift, and if clamping is not successful, the action is repeated again until clamping is successful;

the controller controls the mechanical arm to drive the lifting appliance to lift for a certain distance to stop, the controller controls the crane to slide along the crane rail to drive the lifting appliance to move transversely, the crane stops when moving to a position right above a new trolley storage rail, the plurality of laser range finders II measure the distance between the lifting appliance and the new trolley storage rail, the controller controls the mechanical arm to drive the lifting appliance to descend for a certain distance to stop, the controller controls the lifting appliance to release the new trolley, the weighing sensor II weighs after the release, the successful release is confirmed, the controller controls the mechanical arm to drive the lifting appliance to lift, the action of supplementing the new trolley in place is completed, and meanwhile, the controller reminds the new trolley to be supplemented on the new trolley placing frame;

the controller controls the mechanical arm to drive the lifting appliance to lift for a certain distance to stop, the controller controls the crane to slide along the crane track to drive the lifting appliance to move transversely, the crane stops when moving right above the old trolley storage track, the mechanical arm drives the lifting appliance to descend for a certain distance to stop, and the lifting appliance returns to the original position to wait for the next cycle instruction of the controller.

The utility model discloses at least, include following beneficial effect: the utility model discloses constitute by crane, hoist, laser range finder, weighing sensor, realize accurate location through multiunit laser range finder, realize the handling to new and old platform truck through crane and hoist, improve the platform truck and change efficiency, and this system does not influence the normal production of roasting machine, and equipment can move with normal production speed, does not need any process system operation, has saved the manpower, has improved production efficiency, has guaranteed the production operation rate, has really accomplished continuous non-stop production.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural view of the trolley hoisting device in one embodiment of the present invention;

fig. 2 is a schematic structural view of the clamp gripping the old trolley on the old trolley storage track according to another embodiment of the present invention;

fig. 3 is a schematic structural view of the clamp gripping device moving upward on the old trolley according to another embodiment of the present invention;

fig. 4 is a schematic structural view of the clamp gripping device used for transversely moving the old trolley according to another embodiment of the present invention;

fig. 5 is a schematic structural view of the clamp gripping old trolley moving downward to above the old trolley placing frame according to another embodiment of the present invention;

fig. 6 is a schematic structural view of the clamp according to another embodiment of the present invention when releasing the old trolley onto the old trolley placing frame;

fig. 7 is a schematic structural view of the clamp moving above a new trolley placing frame according to another embodiment of the present invention;

fig. 8 is a schematic structural view of the clamp clamping a new trolley on a new trolley placing frame according to another embodiment of the present invention;

fig. 9 is a schematic structural view of the new pallet truck moving upward by the fixture clamp according to another embodiment of the present invention;

fig. 10 is a schematic structural view of the clamp gripping a new trolley moving above a new trolley storage track according to another embodiment of the present invention;

fig. 11 is a schematic structural view of the clamp moving a new trolley downward according to another embodiment of the present invention;

fig. 12 is a schematic structural view of the clamp releasing a new trolley onto a new trolley storage track according to another embodiment of the present invention;

fig. 13 is a schematic structural view of the clamp moving transversely to the vacant position according to another embodiment of the present invention;

fig. 14 is a front view of the clamp according to another embodiment of the present invention;

fig. 15 is a right side view of the clamp according to another embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials described therein are commercially available unless otherwise specified.

In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-15, the utility model provides a trolley lifting device, it includes:

a crane rail 100;

a crane 101 slidably provided on the crane rail 100 in a lateral direction;

the lifting appliance 200 is connected with the crane 101 and driven by the crane 101 to move, the lifting appliance 200 is provided with a lifting appliance main body 201, two clamps 202 positioned at two sides of the lifting appliance 200 main body, and four target plates 203 symmetrically arranged at the outer sides of the two clamps 202, and the two target plates 203 positioned at the outer sides of any one clamp 202 are symmetrically arranged at intervals;

and the two pairs of storage rails comprise a pair of old trolley storage rails 300 and a pair of new trolley storage rails 301, the bottom of each old trolley storage rail 300 is provided with a first weighing sensor 302 and a plurality of first laser distance measuring instruments 303, and the bottom of each new trolley storage rail 301 is provided with a second weighing sensor 304 and a plurality of second laser distance measuring instruments 305.

In the technical scheme, the utility model discloses set up horizontal extension's crane track 100 in the top of host computer track one side of belt roasting machine, its lateral sliding's crane 101 can be followed in the installation on crane track 100, the below of crane 101 is connected with hoist 200, hoist 200's both sides all are provided with the anchor clamps 202 that are used for pressing from both sides the clamp to get the platform truck tire, a plurality of target boards 203 are installed to the anchor clamps 202 outside, a laser for receiving laser range finder transmission, in addition belt roasting machine's host computer track one side outwards extends respectively has a pair of old platform truck to deposit track 300 and a pair of new platform truck to deposit track 301, be used for shelving old platform truck and new platform truck, weighing sensor 302 and a plurality of laser range finder 303 are installed to the bottom that track 300 was deposited to old platform truck, weighing sensor two 304 and a plurality of laser range finder two 305 are installed to the bottom that new platform truck deposited track 301, a whether used for accurate location and the clamp are got new and old platform truck is got, realize the automatic process of new and old platform truck. When the lifting appliance is used, the first laser range finder 303 measures the distance between the lifting appliance 200 and the wheel of the old trolley, and the lifting appliance 200 descends for a certain distance and stops; the lifting appliance 200 clamps the wheels by micro-motion, a first weighing sensor 302 weighs after clamping, successful clamping is confirmed, and lifting is carried out; the action is not successfully repeated again until the clamping is successful; the lifting appliance 200 is lifted for a certain distance and stopped, and the crane 101 moves transversely; the crane 101 moves to the old trolley transfer position and stops, and the spreader 200 starts to descend; the distance between the lifting appliance 200 and the ground is measured by the laser distance measuring instrument III, the lifting appliance 200 descends for a certain distance and stops, the lifting appliance 200 releases the trolley in a micro-motion mode, and the lifting is carried out, so that the action of lifting the old trolley is realized; the lifting appliance 200 is lifted to a certain height and stopped, the crane 101 continues to move forwards and transversely for a certain distance, the positioning is stopped when a new trolley is supplemented, and the lifting appliance 200 descends; measuring the distance between the lifting appliance 200 and the ground by the laser range finder IV, and stopping when the lifting appliance 200 descends for a certain distance; the lifting appliance 200 is clamped by micro motion, after clamping, the weighing sensor IV weighs, and the clamping is successfully completed and lifted; the action is not successfully repeated again until the clamping is successful; lifting to a certain height and stopping, and transversely and reversely moving the crane 101; the crane 101 moves for a certain distance, the positioning stops on the new trolley track, and the hanger 200 descends; the spreader 200 is stopped by descending a certain distance; the lifting appliance 200 releases the new trolley in a micro-motion manner, the second weighing sensor 304 weighs after release, the release is confirmed to be successful, the lifting is carried out, and the action of supplementing the new trolley in place is completed; the lifting appliance 200 is lifted to a certain height and stopped, and the crane 101 moves forwards and transversely; the crane 101 moves a certain distance, and is positioned and stopped at the position above the stopping position of the old trolley, and the spreader 200 descends to the original position to wait for the next cycle command.

In another technical scheme, the novel automatic loading and unloading system further comprises an old trolley placing frame 400 and a new trolley placing frame 401, the bottom of the old trolley placing frame 400 is provided with three weighing sensors 402 and three laser range finders 403, and the bottom of the new trolley placing frame 401 is provided with four weighing sensors 404 and four laser range finders 405. In this technical scheme, two are put shelf location weighing sensor and are used for judging the state of putting on the frame, a plurality of laser range finder be convenient for survey and the hoist 200 between the distance.

In another technical scheme, the third weighing sensor 402 and the fourth weighing sensor 404 are respectively arranged in the middle of the bottoms of the old trolley placing frame 400 and the new trolley placing frame 401. Among this technical scheme weighing sensor sets up in the middle of putting the bottom of frame, is convenient for survey put frame and hoist 200 go up the distance of mark target board 203, guarantees the accuracy of range finding.

In another technical solution, an old trolley to be disassembled is placed on the old trolley storing track 300, and a new trolley to be loaded is placed on the new trolley storing track 301. In the technical scheme, the old trolley is placed on the old trolley storage track 300, so that the old trolley is convenient to detach, and the new trolley storage track 301 is used for placing the new trolley, so that the new trolley is convenient to load.

In another technical scheme, each clamp 202 comprises two sets of semicircular clamping arms matched with wheels of the trolley, and the four sets of clamping arms of the two clamps 202 are respectively matched and clamped on the peripheries of the wheels of the trolley on two sides of the trolley. In the technical scheme, the clamping arms are arranged, so that the new trolley and the old trolley can be clamped and released conveniently, the automatic clamping and placing function is realized, and the automation is improved.

In another technical solution, two target plates 203 on each clamp 202 are located between two sets of clamp arms, and the bottom of each target plate 203 is an arc-shaped structure. Through the different distances of a plurality of laser range finders and mark target plate 203 bottom cambered surface among this technical scheme, improve the accuracy of range finding, realize accurate location.

In another technical solution, the crane 101 slides laterally along the crane rail 100 to drive the spreader 200 to move laterally, the crane 101 and the spreader 200 are connected by a robot arm (not shown), and the robot arm drives the spreader 200 to move longitudinally. In the technical scheme, the horizontal direction and the vertical direction of the lifting appliance 200 are moved by the matching operation of the crane 101 and the mechanical arm, the flexibility of the device is improved,

in another technical scheme, the system further comprises a controller which is respectively connected with the crane 101, the lifting appliance 200, the mechanical arm, the first weighing sensor 302, the first laser distance meters 303, the second weighing sensor 304, the second laser distance meters 305, the third weighing sensor 402, the third laser distance meters 403, the fourth weighing sensor 404 and the fourth laser distance meters 405;

when the controller receives the fact that the first weighing sensor 302 monitors that the old trolley is placed on the old trolley storage track 300, the controller controls the first laser range finders 303 to measure the distance between the lifting appliance 200 and the old trolley storage track 300, controls the mechanical arm to drive the lifting appliance 200 to move downwards for a certain distance and stop, controls the lifting appliance 200 to clamp the wheels of the old trolley, weighs the first weighing sensor 302 after clamping, confirms that clamping is successful, controls the mechanical arm to drive the lifting appliance 200 to lift, and repeats the action again if clamping is not successful until clamping is successful;

the controller controls the mechanical arm to drive the lifting appliance 200 to lift for a certain distance to stop, the controller controls the crane 101 to slide along the crane track 100 to drive the lifting appliance 200 to move transversely, the crane 101 stops when moving to a position right above an old trolley placing frame 400, the plurality of laser distance measuring instruments III 403 measure the distance between the lifting appliance 200 and the old trolley placing frame 400, the mechanical arm is controlled to drive the lifting appliance 200 to descend for a certain distance to stop, the controller controls the lifting appliance 200 to release the old trolley, the weighing sensor III 402 weighs after the release, the successful release is confirmed, the mechanical arm is controlled to drive the lifting appliance 200 to lift, the old trolley is lifted to move, and meanwhile, the controller reminds the old trolley on the old trolley placing frame 400 to be taken away;

the controller controls the mechanical arm to drive the lifting appliance 200 to lift for a certain distance to stop, when the controller receives a situation that a new trolley is arranged on a new trolley placing frame 401 monitored by a weighing sensor IV 404, the controller controls the crane 101 to slide along the crane rail 100 to drive the lifting appliance 200 to move transversely, the controller stops when the new trolley placing frame 401 is directly above the new trolley placing frame, the plurality of laser range finders IV 405 measure the distance between the lifting appliance 200 and the new trolley placing frame 401, the mechanical arm drives the lifting appliance 200 to descend for a certain distance to stop, the controller controls the lifting appliance 200 to clamp the new trolley, the weighing sensor IV 404 weighs after clamping, the clamping success is confirmed, the mechanical arm is controlled to drive the lifting appliance 200 to lift, if the clamping success is not achieved, the action is repeated again until the clamping success is achieved;

the controller controls the mechanical arm to drive the lifting appliance 200 to lift for a certain distance to stop, the controller controls the crane 101 to slide along the crane track 100 to drive the lifting appliance 200 to move transversely, the crane 101 stops when moving to the position right above the new trolley storage track 301, the plurality of laser range finders II 305 measure the distance between the lifting appliance 200 and the new trolley storage track 301, the mechanical arm is controlled to drive the lifting appliance 200 to descend for a certain distance to stop, the controller controls the lifting appliance 200 to release a new trolley, the weighing sensors II 304 weigh after the release, the release is confirmed to be successful, the controller controls the mechanical arm to drive the lifting appliance 200 to lift, the action of supplementing the new trolley in place is completed, and meanwhile, the controller reminds the new trolley to be supplemented on the new trolley placing frame 401;

the controller controls the mechanical arm to drive the lifting appliance 200 to lift for a certain distance to stop, the controller controls the crane 101 to slide along the crane track 100 to drive the lifting appliance 200 to move transversely, the crane 101 stops when moving right above the old trolley storage track 300, the mechanical arm drives the lifting appliance 200 to descend for a certain distance to stop, and the lifting appliance 200 returns to the original position to wait for the next cycle instruction of the controller.

The working principle of the present invention is illustrated in fig. 1 to 13, and the following actions are controlled by the controller:

a. as shown in fig. 1 to 3, an old trolley to be transferred is placed on an old trolley storage track 300, a plurality of first laser range finders 303 are used for measuring the distance between a lifting appliance 200 and the old trolley storage track 300, the lifting appliance 200 moves downwards, a clamp 202 clamps the periphery of wheels of the old trolley to drive the old trolley to move upwards, and whether clamping is successful is judged through the weight change monitored by a first weighing sensor 302;

b. as shown in fig. 4 to 6, the crane 101 drives the spreader 200 and the old trolley to move left to right above the old trolley placing frame 400, the plurality of laser distance measuring devices three 403 measure the distance between the spreader 200 and the old trolley placing frame 400, the spreader 200 moves down, the clamp 202 releases the old trolley to place on the old trolley placing frame 400, the spreader 200 moves up, and whether the release is successful is judged through the weight change monitored by the weighing sensor three 402;

c. as shown in fig. 7 to 9, the crane 101 drives the spreader 200 to move transversely to a position right above the new trolley placing frame 401, the plurality of laser range finders four 405 measure the distance between the spreader 200 and the new trolley placing frame 401, the spreader 200 moves downwards, the clamp 202 clamps the periphery of the trolley wheels of the new trolley, drives the new trolley to move upwards, and whether clamping is successful is judged through the weight change monitored by the weighing sensor four 404;

d. as shown in fig. 10 to 12, the crane 101 drives the spreader 200 to move transversely to a position right above the new trolley storage rail 301, the plurality of second laser range finders 305 measure the distance between the spreader 200 and the new trolley storage rail 301, the spreader 200 moves downwards, the clamp 202 releases to place the new trolley on the new trolley placing frame 401, the spreader 200 moves upwards, and whether the release is successful is judged through the weight change monitored by the second weighing sensor 304;

e. as shown in fig. 13, the crane 101 drives the spreader 200 to move laterally above the vacant position, and returns to the initial position, and the above operation is repeated to perform the next trolley lifting operation.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims (7)

1. Trolley overhead hoist, its characterized in that includes:

a crane rail;

the crane is arranged on the crane rail in a transverse sliding mode;

the lifting appliance is connected with the crane and driven by the crane to move, the lifting appliance is provided with a lifting appliance main body, two clamps positioned on two sides of the lifting appliance main body and four target plates symmetrically arranged on the outer sides of the two clamps, and the two target plates positioned on the outer sides of any one clamp are symmetrically arranged at intervals;

two pairs of tracks of depositing, it includes that a pair of old platform truck deposits the track and a pair of new platform truck deposits the track, the orbital bottom of depositing of old platform truck is provided with weighing sensor one and a plurality of laser range finder one, and the orbital bottom of depositing of new platform truck is provided with weighing sensor two and a plurality of laser range finder two.

2. The trolley lifting device as recited in claim 1, further comprising an old trolley placing frame and a new trolley placing frame, wherein the bottom of the old trolley placing frame is provided with a third weighing sensor and a third plurality of laser range finders, and the bottom of the new trolley placing frame is provided with a fourth weighing sensor and a fourth plurality of laser range finders.

3. The trolley lifting device as recited in claim 2, wherein the third weighing sensor and the fourth weighing sensor are respectively arranged in the middle of the bottoms of the old trolley placing frame and the new trolley placing frame.

4. The trolley hoist as claimed in claim 1, wherein the old trolley storage rail is on which an old trolley to be dismantled is placed, and the new trolley storage rail is on which a new trolley to be loaded is placed.

5. The trolley lifting device as claimed in claim 1, wherein each clamp comprises two sets of semicircular clamping arms matched with wheels of the trolley, and the four sets of clamping arms of the two clamps are respectively matched and clamped on the peripheries of the wheels of the trolley positioned on two sides of the trolley.

6. The trolley hoist of claim 5, wherein the two target plates on each clamp are located between the two sets of clamp arms, and the bottom of each target plate is of an arcuate configuration.

7. The trolley hoist of claim 1, wherein the hoist slides laterally along the hoist track to move the spreader laterally, the hoist and spreader being connected by a robotic arm that moves the spreader longitudinally.

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