CN116119499A - Winding type elevator cage replacing method - Google Patents

Abstract

The invention discloses a method for replacing a cage of a winding type elevator, which comprises the following steps of S1, preparing work: transporting the new cage to the wellhead car-out side, and removing a device object affecting the old cage to go out of the shaft by the wellhead car-out side; and dismantling the cage shoe on the old cage and the cage guides on the upper side and the lower side of the wellhead; s2, removing the old cage: lowering a steel wire rope of a hoisting machine, pulling and guiding an old cage from the bottom and the side, enabling the bottom of the old cage to move towards the well head car-out side until the old cage is horizontally placed on the well head car-out side, cutting off the connection between the steel wire rope and the old cage, and then horizontally moving the old cage to give up a moving space for a new cage horizontally placed on the well shaft car-out side; s3, installing a new cage: connecting the steel wire rope with the new cage, and pulling the new cage into the shaft; s4, recovering facilities: restoring the cage guide, and installing the cage guide for the new cage. The invention can reduce construction difficulty, improve construction efficiency and reduce potential safety hazard.

Description

Winding type elevator cage replacing method

Technical Field

The invention relates to a method for replacing a cage, in particular to a method for replacing a cage of a winding type elevator.

Background

After the cage of the elevator is used for a period of time, the cage needs to be replaced periodically, so that the operation safety and stability of the elevator are ensured.

The most common ways of replacing the hoisting containers of a single rope winding type hoisting machine in the prior art are as follows:

1. the replacement is directly carried out by means of a crane. However, the large equipment is difficult to be lowered into the well, and the method is not suitable for the underground lifting machine.

2. And (3) laying a platform in the shaft, dismantling the steel wire rope, disassembling the old lifting container in the shaft, and directly assembling the new lifting container in the shaft. The replacement mode has the great disadvantage that most of overhaul flows are carried out in the shaft, and fire-moving operations such as electric welding and the like required by the disassembly of the old container and the assembly of the new container are completed in the shaft, so that on one hand, great potential safety hazards exist, on the other hand, the overhaul time is long, the labor intensity of operators is increased, and the production operation is influenced.

3. And installing a dispatching winch at a wellhead, lowering an old cage and lifting a new cage by a winch wire rope through a bend pulley, and installing a movable pulley to increase the safety coefficient of the wire rope. The mode is complex in operation flow and process, and the cage dragging process is extremely easy to have side turning risks, so that potential safety hazards and construction difficulty are high.

Disclosure of Invention

The invention provides a method for replacing a cage of a winding type elevator, which aims at: the construction difficulty is reduced, the construction efficiency is improved, and the potential safety hazard is reduced.

The technical scheme of the invention is as follows:

a method for replacing a cage of a winding type elevator comprises the following steps:

s1, preparation: transporting the new cage to the wellhead car-out side, and removing a device object affecting the old cage to go out of the shaft by the wellhead car-out side; and dismantling the cage shoe on the old cage and the cage guides on the upper side and the lower side of the wellhead;

s2, removing the old cage: lowering a steel wire rope of a hoisting machine, pulling and guiding an old cage from the bottom and the side, enabling the bottom of the old cage to move towards the well head car-out side until the old cage is horizontally placed on the well head car-out side, cutting off the connection between the steel wire rope and the old cage, and then horizontally moving the old cage to give up a moving space for a new cage horizontally placed on the well shaft car-out side;

s3, installing a new cage: connecting the steel wire rope with the new cage, and pulling the new cage into the shaft;

s4, recovering facilities: restoring the cage guide, and installing the cage guide for the new cage.

As a further improvement of the winding elevator cage replacement method: and when the steps S2 and S3 are executed, modifying a control program of the opening current of the elevator, increasing the opening current in the lifting and lowering processes, and opening the brake after the braking force of the motor is increased.

As a further improvement of the winding elevator cage replacement method: in step S1, the cage rope-loosening protection switch is also required to be removed, the cage overwinding switch is removed, and the cage encoder overwinding is forced in the program.

As a further improvement of the winding elevator cage replacement method: in the step S1, the specific steps of removing the cage shoe are as follows: slowly lifting the old cage to the position of the overhaul layer, and removing the roller cage shoe at the top of the old cage by a wellhead worker; then continuously and slowly rising to a position 2 meters away from the wellhead at the bottom, sealing the wellhead of the cage by using a wood plate as an operation platform, and removing the roller cage ear at the bottom of the old cage by a worker on the operation platform;

if the roller cage shoe base is severely corroded, a fire-fighting water pipe is required to be laid on an operation site, one bench worker cuts old bolts, and the other bench worker collects cutting slag; during operation, observing whether slag falls down or not, and sprinkling water in time.

As a further improvement of the winding elevator cage replacement method: in the step S1, the specific steps of removing the cage guide are as follows: slowly descending the old cage to the position of the overhaul layer, and enabling an operator to enter the overhaul layer at the top of the cage; then the old cage slowly goes up to the position of the bolt where the cage guide is required to be removed, a pulley for hoisting is hung on a steel beam at the top of the shaft, a rope is arranged on the pulley, and the other end of the rope is positioned at a wellhead worker; then the position of the cage is adjusted, and an operator on the overhaul layer removes bolts on the cage guides at the two sides at the same time; after the bolts are disassembled, the bolt holes on the cage guide are bound by using iron wires, and the cage guide is connected with the rope; then the old cage slowly descends to the lower end of the cage guide to continuously detach the bolt at the detached end, and a wellhead worker pulls up the detached cage guide by using a rope, descends to a wellhead and makes a mark;

when the cage side guide is removed, the auxiliary cage side guide needs to be fixed by bolts.

As a further improvement of the winding elevator cage replacement method: the specific steps of the step S1 are as follows: the old cage slowly goes up to the position 1m away from the wellhead from the bottom, and a cradle of the wellhead is bound on a platform of the wellhead by using iron wires, so that the cradle falls to the wellhead to be horizontal; a first guide chain is hung at the outer top side of the wellhead in advance, and 1 second guide chain is hung at the two sides of the outgoing side of the wellhead respectively; the first guide chain is connected with the old cage and is used for pulling the old cage; the second guide chains are respectively connected with the bottoms of the two sides of the old cage close to the car outlet side, so that the cage is prevented from deflecting left and right; simultaneously, two ropes are used for being tied at the center position of the bottom of the cage close to the car outlet side and used for pulling the cage out;

the staff pulls the rope slowly to lead the bottom of the old cage to pull and move to the car outlet side, and meanwhile, the second guide chains on the two sides are nursed, so that the cage is ensured to be in a stressed state, the cage is prevented from inclining in the left-right direction when being pulled outwards, and side turning is avoided; simultaneously observing the state of the old cage when the old cage is out of the shaft and whether the old cage is scratched with other objects;

after the bottom of the old cage is completely discharged from the shaft, controlling a steel wire rope for hoisting the old cage to gradually slow down, so that the old cage falls onto a steel rail at a wellhead, and a worker pulls the rope to gradually pull the whole old cage out of the shaft, and laying a steel pipe at the bottom of the old cage;

and placing the longitudinal rolling bars at the bottom of the old cage, continuously and slowly descending the old cage, automatically sliding the longitudinal rolling bars, pulling the cage out of the shaft by using the longitudinal rolling bars when the whole old cage moves out of the shaft to be close to the shaft, and then continuously placing the steel wire rope until the steel wire rope is not stressed, cutting off the steel wire rope at a wellhead, and pushing the old cage away from the wellhead.

As a further improvement of the winding elevator cage replacement method: in the step S2, after the old cage is pushed away from the wellhead, a transverse rolling rod is respectively laid at the head end and the tail end of the old cage by means of a cross top, and the old cage is horizontally moved to one side of the auxiliary tank track by utilizing a crow bar, so that the movement of the new cage is prevented from being hindered; the rollers at the bottom of the old cage are then removed by means of a roof-crossing.

As a further improvement of the winding elevator cage replacement method: in the step S3, flat cars are placed at the bottoms of the front end and the rear end of the new cage, ropes are respectively bound on the flat cars close to one side of a shaft and channel steel at the bottom of the new cage, and a person pulls the ropes to move the new cage to a wellhead for positioning;

the method comprises the steps of (1) fastening rope ends of steel wire ropes for hoisting a cage, installing annular rope buckles at the top of a new cage, respectively connecting the rope buckles with two safety auxiliary chain fixing rings at two sides of a lifting rod of a self-maintenance layer of the new cage through two second shackles, and then connecting the steel wire ropes with first shackles of the rope buckles;

moving a new cage through the flat car, and controlling the advancing speed of the cage through a rope;

when the overhaul layer of the new cage approaches the shaft, the new cage is lifted through the steel wire rope, and the second guide chains at the two sides of the vehicle outlet side of the well head are connected with the bottom of the new cage, so that the second guide chains are ensured to be in a stressed state; locking a flat car to avoid the flat car from entering a shaft, removing the flat car when a new cage is lifted to the flat car close to the shaft without being stressed, observing the state of another flat car, and locking the other flat car;

the new cage is slowly moved up continuously and gradually pushed to advance, and whether the new cage is scratched with other objects or not is noted; when another flat car approaches the shaft, the new cage is pulled up by using a rope connected with the new cage, the flat car is removed, and the rope is slowly released, so that the new cage stably enters the shaft;

restoring the cradle, and ensuring that the cradle is lifted in place;

as a further improvement of the winding elevator cage replacement method:

in the step S3, after the new cage enters a shaft, the new cage is controlled to slowly descend, an upper disc of the lower cage is supported by I-shaped steel at a horizontal steel beam of a well mouth, a lifted steel wire rope is removed, the head end of the lifting steel wire rope is cut off, the steel wire rope is connected with the new cage through a wedge-shaped ring, and the two ends of a safety clamp are adjusted to be consistent;

slowly lifting the new cage, gradually stressing the steel wire rope, pulling up the safety card, and observing the action condition;

and slowly loading the new cage, and removing the I-steel used by the cage.

As a further improvement of the winding elevator cage replacement method:

the specific steps of the step S4 are as follows: firstly restoring the guide rails at two sides of a shaft, and pulling the guide rails to the installation position by using a pulley at the top of a new cage, wherein staff at the top of the new cage restore the guide rails at two sides;

sealing the wellhead into an operation platform by using a wood plate, installing a roller cage shoe at the lower part of a new cage on the operation platform by a worker, removing the wood plate sealing the wellhead, slowly lowering the new cage to the position at which the worker can operate the upper part of the new cage, and installing the roller cage shoe at the upper part of the new cage by the worker;

and (3) recovering the dismantled device object in the step S1, and debugging and testing.

Compared with the prior art, the invention has the following beneficial effects: (1) According to the invention, the cage is replaced by using the steel wire rope of the elevator, and is pulled and guided by a guide chain, a rolling bar, a rope, a flat car and the like, so that equipment such as a crane and a winch is not needed, the cage is not needed to be disassembled in a shaft, the construction difficulty is low, the efficiency is high, and the potential safety hazard is reduced; (2) According to the invention, the starting running speed of the elevator is controlled by modifying the brake opening current, so that the brake is opened after the braking force of the motor is increased, the potential safety hazards of speed mutation and reverse speed during cage starting caused by overlarge tension difference are avoided, and the lifting and lowering are more stable; (3) When a new cage enters the shaft, the two steel wire rope buckles and the steel wire rope of the shackle are connected with the hoisting machine, the mode of directly connecting with the wedge-shaped ring of the cage is cancelled, deformation of the wedge-shaped ring shaft along the vertical direction in the hoisting process is avoided, meanwhile, the effective length of the cage during hoisting can be shortened, and the difficulty of the new cage entering the shaft is greatly reduced.

Drawings

FIG. 1 is a schematic illustration of a cage prior to replacement;

FIG. 2 is a top view of the well bore and wellhead departure side of the old cage after exiting the well bore;

FIG. 3 is a schematic illustration of an old cage out of a wellbore;

fig. 4 is a schematic of a new cage into a wellbore.

Detailed Description

The technical scheme of the invention is described in detail below with reference to the accompanying drawings:

as in fig. 1, the present embodiment is directed to cage replacement of a single rope wrap elevator in a 280 east shaft. The elevator adopts double cages for hoisting, the cage is a 2# double-layer cage, the cage dead weight is 2.73t, the specification is 1080 x 1800, and the load is 4.5t. Safety doors, a cradle 6 and a car arrester are arranged on two sides of the wellhead.

The following table is a list of tools that need to be prepared:

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1 early preparation for maintenance

1.1 checking whether the fire-fighting water pipes at the well heads are normal or not, wherein 2 fire extinguishers of 8kg are arranged at the well heads, and the number of the fire-fighting tools is in accordance with the field requirement.

1.2 illuminating and installing the wellhead overhaul area in place in advance, and ensuring that a switch is in place in wellhead safety door and car arrester tests.

1.3 the new cage 8 is transported to the departure side of the +280 wellhead and the relevant dimensions are confirmed.

1.4 reinforcing the roller cage shoe base of the new cage 8 in advance and performing roller cage shoe test installation, so as to ensure that the cage is not modified after being installed, and removing the new cage shoe before replacement.

1.5 a hoisting hole is drilled on the outer top wall of the wellhead in advance, and 15t guide chain (namely a first guide chain 7) is hung to serve as a traction device for the old cage 4 to exit the shaft 5 (the traction device can be used for standby, such as insufficient traction power of a large rope, and the guide chain can be used for replacement).

1.6 rust removal is carried out on two cage guide fixing bolts on two sides above the wellhead level in advance.

1.7 replacing the +280 wellhead car stopper at the car outlet side, removing the transmission pin shaft of the safety door, and leveling the cradle 6.

1.8, removing the cage rope loosening protection switch; removing the cage overwinding switch; the cage encoder is forced to overwind during the procedure.

1.9, removing the top beam of the hydraulic door frame at the car outlet side of the cage; and the oil cylinders and the inductive switches on the two sides of the hydraulic door are removed. The top beam of the door frame and the hydraulic door are arranged at the position 2 meters outside the shaft 5, and are passages for personnel to pass through and materials to be transported, and are passages for the cage to enter the shaft 5.

1.10, the new cage 8 is lifted in the adjusted direction and placed on a trolley to be moved to the wellhead departure side, so as to prepare for lifting the new cage 8.

1.11 before servicing the shaft 5 was sprayed with water to prevent fire and prepared with a hose (30 meters) long enough to prevent fire.

1.12 preparation and inspection of the gas cutting apparatus. The cutting gun must be intact; the pressure gauge and the pressure reducing valve are sealed well, and the adjustment is flexible and reliable; the gas cylinder protective cover is intact, and the gas cylinder nozzle has no deformation and gas leakage; the pressure of oxygen and acetylene is normal; the oxygen and acetylene bottle shockproof rings and caps are intact; the belt pipe has no damage and air leakage phenomenon.

1.13 before firing operation, combustible objects on and around an operation site should be removed, a safe channel of the operation site is kept smooth, and facilities should be complete and firm.

The preparation work of more than 1.14 is carefully checked by construction responsible persons and site safety responsible persons once, and the work can be performed after confirming that no problem exists.

1.15 processing and manufacturing cage overwinding slide rails, a parking switch reflector base, a magnet and a base in advance, and installing the cage overwinding slide rails, the parking switch reflector base, the magnet and the base on a new cage 8 according to the installation size of an old cage 4.

1.16 implement the material tool and the head sheave unhooking device (or adopt the new unhooking hook) needed by unhooking test in advance

1.17 cleaning paint at the position of the peach-shaped ring rope groove of the new cage 8.

2 maintenance process

And 2.1, removing the roller lugs on the upper layer and the lower layer of the cage.

2.1.1 the cage is slowly moved up to the position of the overhaul layer, and the roller lugs at the top of the cage are removed. And continuously slowly lifting to a position 2 meters away from the wellhead, taking the wellhead of the cage with the wooden seal and 280 cages as an operation platform, and removing roller shoes at the bottoms of the cages.

2.1.2 if the roller cage shoe base rust is serious, gas cutting is needed, a fire fighting water pipe is required to be laid to an operation site before cutting, a fitter cuts old bolts, and a fitter collects cutting slag.

2.1.3 during operation, observing whether slag falls down or not around, and sprinkling in time.

2.2 removing the wellhead wood plates and removing 2 cage guides on the upper side and the lower side of the wellhead.

2.2.1 the cage slowly descends to the overhaul layer, 4 fitters bring tools into the overhaul layer at the top of the cage, and tie the safety belt.

2.2.2 as shown in figures 1 and 2, the cage slowly goes up to the position (from top to bottom) where the cage guide bolts are required to be removed, 1t pulleys for hoisting are respectively hung on the top steel girder 1, and large ropes are installed; and (3) adjusting the position of the cage, and removing the wooden bolts of the guides at two sides by a group of 2 persons. After the bolts are disassembled, iron wires are used for binding the tank track wood bolt holes for lifting and are connected with the large ropes (the other ends of the large ropes are in the hands of personnel at the wellhead); the cage is slowly lowered to the bolt at the lower end of the wooden guide 13 for disassembly, and a wellhead personnel pulls up the removed wooden guide by using a large rope and lowers the wooden guide to the wellhead (marked respectively). And 2 guide rails on the upper side and the lower side of the wellhead are removed. Note that the cage side and the auxiliary cage side guides share bolts, and when the cage side guides are removed, the auxiliary cage side guides need to be fixed by bolts.

3 remove old cage 4

3.1 as shown in figures 1 to 3, the cage is slowly lifted to the bottom 1m away from the wellhead, and the wellhead cradle 6 is bound on the wellhead platform by using iron wires, so that the cradle 6 falls to the wellhead to be horizontal.

And 3.2, respectively hanging 12 t guide chains (second guide chains 11) on two sides of the well head vehicle outlet side, and connecting with the bottom bodies of two sides of the cage close to the vehicle outlet side to avoid the left-right deflection of the cage. Two large ropes are used for pulling the cage out at the center position of the bottom of the cage close to the car outlet side.

3.3, preparing 10 people to slowly pull the large rope, so that the bottom of the old cage 4 is pulled to the car outlet side (at the moment, the steel wire rope 2 of the elevator is synchronously lowered), 2 people care for the guide chain 2t, the cage is prevented from inclining in the left-right direction when being pulled outwards, rollover is avoided, and the guide chain is always in a stressed state in the process. At this time, two people need to observe the toppling state of the top, the well wall and the cage at the side of the signal room when the cage is out of the well bore 5 respectively, and whether scratch exists or not.

3.4 after the bottom of the cage is completely discharged from the shaft 5, the cage gradually descends, the cage falls onto a wellhead railway, personnel pulls a large rope, the cage integrally gradually pulls out of the shaft 5, and steel pipes are gradually laid to the bottom of the cage.

Note that: 1. when the safety door is taken out, the gaps between the cage and the I-steel columns are needed to be closely paid attention to because the gaps between the I-steel columns on two sides are small, so that scratch is avoided. 2. After the steel pipe is stressed, attention is paid to avoid the cage from suddenly moving forward for a large distance.

3.5 when the cage is moved out of the shaft 5 as a whole and is close to being laid down, the cage is slowly lowered (attention is paid to observing the looseness of the steel wire rope 2 in the machine room), and the cage is pushed to a set position by using the manpower of the longitudinal rollers.

3.6 putting the transverse rollers 10 prepared in advance at the bottom of the cage, continuing to slowly lower the old cage 4, automatically sliding the rollers forward, and pulling the cage out of the shaft 5 by using the longitudinal rollers when the old cage 4 is wholly moved out of the shaft 5 to be close to the level. After the old cage 4 is withdrawn from the shaft 5, the cage continues to pay off the ropes, so that the phi 32 main steel wire rope 2 is cut off at the wellhead after the phi 32 main steel wire rope 2 is not stressed, and the old cage 4 is pushed away from the wellhead.

3.7, two groups of old and new cages are adjusted in position, a rolling rod with the length of 3.5m is respectively laid at the head end and the tail end of the old cage 4 by means of straddling, the old cage 4 is horizontally moved onto the auxiliary cage track by using a crow, and the movement of the new cage 8 is not influenced; the old cage 4 rollers are removed by means of a roof spanning.

3.8, positioning the new cage 8, and binding a big rope on the front end rack truck; the channel steel at the bottom of the new cage 8 is bound with a big rope, and a special person is arranged to pull the big rope.

4 installing a new cage 8

4.1 as shown in figures 1 and 4, the rope ends of main steel wire ropes 2 with the diameter of 32mm of the cage are fastened, the positions of safety auxiliary chain fixing rings on two sides of a lifting rod of a new cage 8 self-maintenance layer are connected with a rope fastener 14 with the diameter of 15.5 m and the circumference of 4.5 m by two second shackles with the diameter of 5t (in-place preparation in the earlier stage), and a main traction rope with the diameter of 32 is connected with the rope fastener 14 with the diameter of 15.5 by a first shackle 15 (15 t).

4.2, continuously moving forward by means of the trolley cage, observing the position of the trolley by a special person during the process, controlling the advancing speed of the cage by a large rope and avoiding the cage from being flushed into the shaft 5 instantly when the moving speed of the cage is too high.

4.3 when the cage maintenance layer approaches the shaft 5, the new cage 8 starts to lift, and the guide chains at the two sides of the vehicle outlet side are connected with the bottom of the new cage 8, so that the guide chains are stressed; the flat car 9 is locked by using the large ropes to avoid entering the shaft 5, the new cage 8 is lifted until the first flat car 9 (close to the shaft 5) is completely unstressed, the state of the second flat car 9 is observed, and the flat car 9 is connected by using the large ropes and manually locked.

4.4, continuously slowly lifting the cage, gradually pushing the new cage 8 to advance, paying attention to observing that the cage needs to be positioned in the middle of a wellhead railway, and paying attention to whether scraping positions exist on the wellhead and two sides of the shaft 5; when the flat car 9 at the bottom of the cage is close to the shaft 5, the cage is pulled up by using the large ropes, the flat car 9 is removed, and the large ropes are slowly released, so that the cage stably enters the shaft 5.

4.5 restoring the cradle 6, ensuring that the cradle 6 is in position. The cage is slowly lowered, the lower layer cage is supported by two 16# I-beams at the position of the wellhead horizontal steel beam 1, the lifting steel wire rope 2 is removed, and the head end of the lifting steel wire rope 2 is cut off by 1m (the main steel wire rope 2 is connected through a U-shaped clamp when the new cage 8 is pulled, so that the rope ends are cut off).

4.6, connecting the lifting steel wire rope 2 with the cage wedge-shaped ring 3, adjusting the ends of the two ends of the safety clamp to be consistent, slowly lifting the cage, gradually stressing the steel wire rope 2, pulling up the safety clamp, and observing the action condition; and slowly loading the cage, and removing the 16# I-steel used by the cage.

5 recovery facility

5.1 recovery of the shaft 5 side guides, the wooden guides 13 are pulled up to the installation position by using the cage top pulleys, and 4 persons at the top of the cage recover the side guides respectively in two groups.

5.2 sealing the wellhead with a wood plate, installing a roller cage shoe at the lower part of the cage as an operation platform, removing the wellhead sealing wood plate after the roller cage shoe at the lower part of the cage, slowly lowering a new cage 8 to a proper position, and installing the roller cage shoe at the upper part of the cage.

And 5.3, recovering the device removed in the early stage of the site, and debugging and testing.

5.4.7 the sensitivity of the safety tongs is observed before unhooking the new cage 8.

The method is suitable for replacing the light cage of the winding type elevator, has simple operation flow and strong operability, can complete cage replacement only by 8 hours, and can greatly improve the overhaul operation efficiency.

Claims (10)

1. A method for replacing a cage of a winding type elevator is characterized by comprising the following steps:

s1, preparation: transporting the new cage (8) to the wellhead departure side, and removing the device object which affects the old cage (4) to leave the shaft (5) at the wellhead departure side; and dismantling the cage shoe on the old cage (4) and the cage shoe on the upper side and the lower side of the wellhead;

s2, removing the old cage (4): lowering a steel wire rope (2) of a hoisting machine, pulling and guiding an old cage (4) from the bottom and the side, enabling the bottom of the old cage to move towards the well head car-out side until the old cage (4) is horizontally placed on the well head car-out side, cutting off the connection between the steel wire rope (2) and the old cage (4), and then horizontally moving the old cage (4) to give up a moving space for a new cage (8) horizontally placed on the well shaft (5) car-out side;

s3, installing a new cage (8): connecting the steel wire rope (2) with the new cage (8), and towing the new cage (8) into the shaft (5);

s4, recovering facilities: and recovering the cage guide, and installing the cage guide for the new cage (8).

2. The method for replacing a cage of a winding elevator as claimed in claim 1, wherein: and when the steps S2 and S3 are executed, modifying a control program of the opening current of the elevator, increasing the opening current in the lifting and lowering processes, and opening the brake after the braking force of the motor is increased.

3. The method for replacing a cage of a winding elevator as claimed in claim 1, wherein: in step S1, the cage rope-loosening protection switch is also required to be removed, the cage overwinding switch is removed, and the cage encoder overwinding is forced in the program.

4. The method for replacing a cage of a winding elevator as claimed in claim 1, wherein: in the step S1, the specific steps of removing the cage shoe are as follows: slowly lifting the old cage (4) to the position of the overhaul layer, and removing the roller cage ear at the top of the old cage (4) by a wellhead worker; then, continuously and slowly lifting to a position 2 meters away from the wellhead at the bottom, sealing the wellhead of the cage by using a wood plate as an operation platform, and removing roller shoes at the bottom of the old cage (4) on the operation platform by workers;

if the roller cage shoe base is severely corroded, a fire-fighting water pipe is required to be laid on an operation site, one bench worker cuts old bolts, and the other bench worker collects cutting slag; during operation, observing whether slag falls down or not, and sprinkling water in time.

5. The method for replacing a cage of a winding elevator as claimed in claim 1, wherein: in the step S1, the specific steps of removing the cage guide are as follows: the old cage (4) slowly descends to the position of the overhaul layer, and an operator enters the overhaul layer at the top of the cage; then the old cage (4) slowly goes up to the position of the bolt of the cage guide to be removed, a pulley for hoisting is hung on a steel beam (1) at the top of the shaft (5), a rope is arranged on the pulley, and the other end of the rope is positioned at a wellhead worker; then the position of the cage is adjusted, and an operator on the overhaul layer removes bolts on the cage guides at the two sides at the same time; after the bolts are disassembled, the bolt holes on the cage guide are bound by using iron wires, and the cage guide is connected with the rope; then the old cage (4) slowly descends to the lower end of the cage guide to continuously detach the bolt at the detached end, and a wellhead worker pulls up the detached cage guide by using a rope, descends to a wellhead and makes marks;

when the cage side guide is removed, the auxiliary cage side guide needs to be fixed by bolts.

6. The replacement method of a cage of a winding type elevator as claimed in claim 1, wherein the specific steps of the step S1 are as follows: the old cage (4) slowly goes up to the position 1m away from the wellhead from the bottom, a cradle (6) of the wellhead is bound on a platform of the wellhead by using iron wires, and the cradle (6) falls to the wellhead to be horizontal; a first guide chain (7) is hung at the outer top side of the wellhead in advance, and 1 second guide chain (11) is hung at the two sides of the outgoing side of the wellhead respectively; the first guide chain (7) is connected with the old cage (4) and is used for pulling the old cage (4); the second guide chains (11) are respectively connected with the bottoms of the two sides of the old cage (4) close to the vehicle outlet side, so that the cage is prevented from deflecting left and right; simultaneously, two ropes are used for being tied at the center position of the bottom of the cage close to the car outlet side and used for pulling the cage out;

the staff pulls the rope slowly to lead the bottom of the old cage (4) to pull and move towards the car outlet side, and meanwhile, the second guide chains (11) on the two sides are nursed to ensure the cage to be in a stress state, so that the cage is prevented from tilting in the left-right direction during the outward pulling, and side turning is avoided; simultaneously observing the state of the old cage (4) when the old cage is out of the shaft (5) and whether the old cage is scratched with other objects;

after the bottom of the old cage (4) is completely discharged out of the shaft (5), controlling a steel wire rope (2) for hoisting the old cage (4) to gradually slow down, enabling the old cage (4) to fall onto a steel rail (12) at a wellhead, pulling the rope by a worker, enabling the whole old cage (4) to gradually pull out of the shaft (5), and laying a steel pipe at the bottom of the old cage (4);

the longitudinal rolling rod is placed at the bottom of the old cage (4), the old cage (4) continues to slowly descend, the longitudinal rolling rod automatically slides, when the old cage (4) integrally moves out of the shaft (5) to be close to the shaft (5) and is placed on the ground, the longitudinal rolling rod is used for pulling the cage out of the shaft (5), then the steel wire rope (2) continues to be placed until the steel wire rope (2) is not stressed, the steel wire rope (2) is cut off at a wellhead, and the old cage (4) is pushed away from the wellhead.

7. The replacement method of the winding elevator cage according to claim 6, wherein in the step S2, after the old cage (4) is pushed away from the wellhead, by means of respectively laying a transverse rolling bar (10) at the head end and the tail end of the old cage (4) in a straddling manner, the old cage (4) is moved to one side of the auxiliary cage track by using a crowbar, so that the new cage (8) is prevented from being blocked; the rollers at the bottom of the old cage (4) are then removed by means of a roof-crossing.

8. The replacement method of the winding elevator cage according to claim 1, wherein in the step S3, flat cars (9) are placed at the bottoms of the front end and the rear end of the new cage (8), ropes are respectively bound on the flat cars (9) close to one side of a shaft (5) and channel steel at the bottom of the new cage (8), and a person pulls the ropes to move the new cage (8) to a wellhead to be in place;

the rope ends of the steel wire ropes (2) for hoisting the cages are fastened, annular rope buckles (14) are arranged at the tops of the new cages (8), the rope buckles (14) are respectively connected with two safety auxiliary chain fixing rings at two sides of a lifting rod of the self-maintenance layer of the new cages (8) through two second shackles, and then the steel wire ropes (2) are connected with first shackles (15) of the rope buckles (14);

moving a new cage (8) through a flat car (9), and controlling the cage advancing speed through ropes;

when the overhaul layer of the new cage (8) approaches the shaft (5), the new cage (8) is lifted through the steel wire rope (2), and the second guide chains (11) at the two sides of the well head vehicle outlet side are connected with the bottom of the new cage (8), so that the second guide chains (11) are in a stressed state; locking the flat car (9) to avoid the flat car from entering the shaft (5), removing the flat car (9) when the new cage (8) is lifted to the flat car (9) close to the shaft (5) and is not stressed at all, observing the state of the other flat car (9), and locking the other flat car (9);

the new cage (8) continues to slowly go up and is pushed gradually to advance the new cage (8), and whether the new cage (8) is scratched with other objects or not is noted; when another flat car (9) approaches the shaft (5), the new cage (8) is pulled up by using a rope connected with the new cage (8), the flat car (9) is removed, and the rope is slowly released, so that the new cage (8) stably enters the shaft (5);

restoring the cradle (6) ensures that the cradle (6) is raised into position.

9. The method of changing a winding elevator cage of claim 8, wherein: in the step S3, after a new cage (8) enters a shaft (5), the new cage (8) is controlled to be slowly lowered, an upper disc of a lower cage is supported by I-shaped steel at a wellhead horizontal steel beam (1), a lifted steel wire rope (2) is removed, the head end of the lifting steel wire rope (2) is cut off, the steel wire rope (2) is connected with the new cage (8) through a wedge-shaped ring (3), and gaps at two ends of a safety clamp are adjusted to be consistent;

slowly lifting the new cage (8) to gradually stress the steel wire rope (2), pulling up the safety card, and observing the action condition;

and slowly loading the new cage (8) and removing the I-steel used by the cage.

10. The method for replacing a cage of a winding elevator as claimed in claim 1, wherein:

the specific steps of the step S4 are as follows: firstly restoring the guide tracks on two sides of a shaft (5), and pulling the guide tracks to the installation position by utilizing the pulleys on the top of a new cage (8), wherein staff on the top of the new cage (8) restore the guide tracks on two sides;

sealing the wellhead into an operation platform by using a wood plate, installing roller shoes at the lower part of a new cage (8) on the operation platform by a worker, removing the wood plate sealing the wellhead, slowly lowering the new cage (8) to a position at which the worker can operate the upper part of the new cage (8), and installing the roller shoes at the upper part of the new cage (8) by the worker;

and (3) recovering the dismantled device object in the step S1, and debugging and testing.

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