CN108775153A - Conduit lifting device and method for the perfusion of power transmission tower concrete filled steel tube high-altitude - Google Patents

Abstract

The invention discloses a conduit lifting device and method for high-altitude pouring of steel pipe concrete for transmission towers, and relates to a conduit lifting device and method. At present, the conduit is fixed with a steel wire sleeve, and the lifting operation is performed at the flange of the steel pipe, which has low operating efficiency and low safety. The invention includes a base, a bracket, a steel wire rope block group, a conduit fixing support, and a hoisting mechanism; the base includes a bottom frame, and the bottom frame is provided with long grooves at four corners, and the bottom frame is fixed on the flange of the steel pipe spanning the tower body through connecting pieces , the bracket is vertically arranged on the bottom frame, and the bracket is provided with a steel wire rope block; the fixed support of the catheter includes a fixed frame and a connecting rod, and the connecting rod is detachably connected to the fixed frame through a connecting piece. the conduit hole. The technical proposal improves the guide operation efficiency and increases the safety of the guide tube operation; the long groove is provided to facilitate the penetration of the connectors and improve the reliability of the connection of the bottom frame.

Description

Conduit lifting device and method for high-altitude pouring of steel pipe concrete for transmission towers

technical field

The invention relates to a conduit lifting device and method, in particular to a conduit lifting device used for high-altitude pouring of steel pipe concrete for transmission towers.

Background technique

The large-scale spanning tower of the large-span project of the transmission line, due to the large load characteristics of the main material of the tower body, adopts the steel pipe concrete structure, whether it is to improve the buckling resistance of the steel pipe members, to enhance the pressure bearing capacity of the steel pipe section, or to reduce the difficulty of manufacturing and construction. , have more advantages than pure steel pipe structures, and have become a development trend in the design of large spanning tower structures.

Due to the structural characteristics of the large root opening of the spanning tower, the section length of the nodes in the main pipe of the tower body is longer, and the corresponding height difference is also relatively large, generally in the range of 20-40m, and the height difference is larger as it is closer to the bottom; The synergistic effect of the steel pipe structure, the inner wall of the steel pipe is generally provided with a large number of transverse and longitudinal stiffeners, and even a steel structure truss is arranged inside the steel pipe, and the internal structure of the steel pipe is complex.

Due to the large height difference between the nodes of the steel pipe and the complex internal structure, it is difficult to guarantee the quality of the pouring by the conventional dropping method. Therefore, the pouring method of arranging a pipe in the center of the steel pipe to assist the concrete pouring from top to bottom has become a guarantee for concrete pouring construction. The preferred solution for quality.

The conduit is a feeding channel used to assist concrete pouring and falling, so as to prevent the segregation of concrete in steel pipes with large height differences and complex structures, and ensure the quality of concrete. The total length of the conduit needs to be 15-35m deep into the steel pipe. Considering the convenience of installation and removal, the conduit adopts a fixed-length segmented connection method. At present, the conduit is fixed with a steel wire sleeve, combined with a chain hoist, and the lifting operation is performed at the flange of the steel pipe. This method has two major disadvantages: (1) The operation efficiency is low, and the lifting speed is slow when using a chain hoist, and every The lifting or dismantling of sectioned pipes requires manual switching of the gourd and the binding point of the pipes inside the steel pipe; (2) The operation safety is not high, and the operator performs the lifting operation of the pipes in the confined space inside the steel pipe. If the station is not correct, It is easy to cause personal injury.

Contents of the invention

The technical problem to be solved and the technical task proposed by the present invention are to perfect and improve the existing technical solutions, and to provide a conduit lifting device and method for high-altitude pouring of steel tube concrete for transmission towers, so as to improve operation efficiency and operation safety. For this reason, the present invention takes the following technical solutions.

The conduit hoisting device for high-altitude pouring of steel pipe concrete for transmission towers is characterized in that it includes a base, a bracket, a wire rope block, a conduit fixing support, and a hoisting mechanism. Set on the base; the base includes a bottom frame, and the four corners of the bottom frame are provided with long grooves for piercing connectors, and the bottom frame is fixed on the flange of the steel pipe spanning the tower body through the connectors. The bracket is vertically arranged on the bottom frame, and the bracket is provided with a wire rope pulley group; the catheter fixing support includes a fixing frame and a connecting rod, and the connecting rod is detachably connected to the fixed frame through a connecting piece. On the frame, the fixed frame is provided with a conduit hole matched with the conduit, and the size of the conduit hole is larger than the diameter of the conduit and smaller than the clip on the conduit. The technical proposal improves the operation efficiency of the segmental lowering installation and the segmental lifting removal of the conduit, and increases the safety of the conduit operation. Long slots are provided to facilitate the passage of the connectors and improve the reliability of the connection of the bottom frame.

As a further improvement and supplement to the above technical solutions, the present invention also includes the following additional technical features.

The bottom frame is also provided with a backing plate, and the backing plate is provided with a stud hole, and the stud passes through the round hole of the flange, the long groove of the bottom frame, and the backing plate through the stud hole from bottom to top. Threaded connection nut. A plurality of round holes are arranged on the flange, and the round holes are used for piercing the studs, and the technical scheme reliably fixes the bottom frame on the flange.

The bottom frame includes an outer beam and two supporting beams in the middle, the length of the supporting beam is longer than that of the outer beam, the two supporting beams are arranged in parallel, and the above-mentioned conduit fixing support and hoisting mechanism are arranged on the two supporting beams.

The conduit fixing support is detachably placed on the bolster.

The support includes a main support rod, a rear support rod, a beam, an upward slanting support rod, a hanging plate, and a round rod climbing rod. There are two main support rods, and the two main support rods are vertically arranged on the bearing beam On the top, the top of the two main poles is provided with a crossbeam, and the main pole below the crossbeam is provided with multiple climbing poles arranged in parallel; The top of the rear strut is provided with the above-mentioned upward slanting strut, and the upper part of the upward slanting strut is connected with the crossbeam through a hanging plate.

The hanging board is arranged vertically to the crossbeam, and the wire rope blocks are arranged below the hanging board.

The two upper diagonal braces are arranged symmetrically on both sides of the hanging plate; the lower ends of the diagonal braces are fixedly connected with the upper ends of the rear braces, and the lower ends of the rear braces are arranged at the ends of the bearing beams.

The wire rope block group includes an upper connection shackle, an upper lifting block, a lower lifting block, a lower connection shackle, a steel wire rope, and a guide block; the upper lifting block is connected to the hanging plate through an upper connection shackle; A steel wire rope for lifting is set between the lower lifting block and the upper lifting block, and the steel wire rope protruding from the hoisting mechanism is connected with the upper lifting block through the guide block.

In the length direction of the bolster, the hoisting mechanism, the conduit fixing support, and the bracket are arranged in sequence. The hoisting rope reel is connected with the motor through the hoisting gear box, and the hoisting tackle is driven up and down by the motor.

Another object of the present invention is to provide a working method for a conduit lifting device for high-altitude pouring of steel pipe concrete in a power transmission tower, the working method includes the installation of conduits in sections and the installation of conduits in sections and the removal of conduits;

1) The installation steps of the conduits being lowered in sections include:

11) Drive the winch motor, hoist the first section of the conduit from top to bottom, and slowly lower it along the square hole in the conduit fixing support until the clamp on the outer wall of the conduit falls on the conduit fixing support, that is, the conduit passes through the clamp by its own weight. , the fixed support, and the base of the hoisting device are transmitted to the steel pipe of the tower body until the hoisting wire rope pulley block is not stressed;

12) Untie the binding connection rope between the hoisting block and the conduit under the hoisting wire rope block group, and change the second section of conduit. The section and the first section of conduit are raised as a whole until the clamp height of the first section of conduit is higher than the fixed support, that is, the self-weight of the conduit is all borne by the hoisting wire rope tackle group;

13) Loosen the connecting bolts on the detachable connecting rod of the conduit fixing support, open the opening of the fixing frame, and temporarily remove the fixing support to avoid affecting the lowering of the conduit;

14) Drive the hoisting motor to loosen the hoisting rope reel, loosen the clamp height of the first section of conduit lower than the conduit fixing support, restore the installation of the conduit fixing support, and continue to loosen the hoisting rope reel until the second section The clamp on the outer wall of the pipe section falls on the pipe fixing support; in this way, the steps from 12) to 14) complete the lengthening and lowering work of a section of pipe, and the subsequent lengthening and lowering installation repeats steps 12), 13), and 14) ;

2) The steps for segmental lifting and removal of conduits include:

21) Drive the hoisting motor to tighten the hoisting rope reel, close the clamp height of the first segment of the conduit from top to bottom higher than the conduit fixing support, loosen the connecting bolts on the detachable connecting rod of the conduit fixing support, Open the opening of the fixed frame and temporarily remove the fixed support to avoid affecting the lifting of the catheter;

22) Continue to drive the hoisting motor to tighten the hoisting rope reel, raise the conduit as a whole, until the clamp height of the second section of conduit is higher than the fixed support, and restore the installation of the conduit fixed support;

23) Slowly drive the hoisting motor to loosen the hoisting rope reel until the clamp on the outer wall of the second section of the conduit falls on the fixed support of the conduit, that is, the self-weight of the conduit is transmitted to the steel pipe of the tower body through the clamp, the fixed support, and the base of the lifting device up, until the hoisting wire rope blocks are under no force;

24) Untie the binding connection rope between the hoisting block under the hoisting wire rope block group and the first section of conduit, remove the first section of conduit, and replace the hoisting wire rope block assembly on the second section of conduit; so from 21) to 24) The first step is to complete the lifting and removing work of a section of conduit, and then repeat steps 21), 22), 23), and 24) for the subsequent lifting and removing.

Beneficial effects: the technical proposal improves the operation efficiency of the segmental lowering installation and segmental lifting removal of the conduit, and increases the safety of the conduit operation.

This technical solution effectively combines the plane of the top flange of the steel pipe and the flange bolt holes, reasonably arranges the base, bracket, hoisting wire rope block, fixed support, winch, etc., and realizes the installation and removal of the conduit by electric traction mechanical means.

In this technical scheme, a platform and a lifting system are set on the flange end of the steel pipe main pipe, so that the construction operators can stand on the platform, so that the installation and removal of the steel pipe concrete blanking pipe can be easily and smoothly realized, and the construction personnel can effectively prevent the construction personnel from entering the closed pipe interior. Space operation minimizes the safety risk of construction work; adopts the conduit with the outer wall clamp, cooperates with the semi-open fixed support, and with the help of the electric winch device, realizes the segmental lowering installation and segmental lifting removal of the conduit, avoiding manpower The pull hoist can effectively reduce the labor intensity; the base with long slot holes can adjust the position of the fixing bolt holes, which can adapt to and meet the matching connection requirements of steel pipe flanges of various specifications.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the base structure of the present invention.

In the figure: 1-base; 101-bottom frame; 102-fixing bolt; 103-backing plate; 104-bearing beam; 2-bracket; 201-main support rod; Diagonal brace; 205-hanging plate; 206-climbing rod; 3-wire rope block; 301-upper connection shackle; 302-upper lifting block; 303-lower lifting block; 304-lower connection shackle; 305 -wire rope; 306-guide block; 4-conduit fixed support; 401-fixed frame; 402-detachable connecting rod; 403-connecting bolt; ; 503-winch motor; 6-pipe; 7-clamp; 8-flange.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

A conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers, which consists of a base part, two bracket parts, three wire rope pulley group parts, four conduit fixed support parts, and a winch mechanism 5, as shown in Figure 1.

Wherein: the base 1 of the conduit lifting device is mainly composed of a bottom frame 101, a fixing bolt 102, and a backing plate 103, as shown in FIG. 2 . The bottom frame 101 is made of square steel and channel steel welded into a whole frame, and long slot holes are arranged at the four corners for arranging the fixing bolts 102 between the bottom frame 101 and the steel pipe flange 8 . The specific position of the slotted hole is comprehensively determined by the bolt hole position of each steel pipe flange of the tower body, so as to meet the matching connection requirements of flanges of various specifications. Fixing bolts 102 pass from bottom to top, passing through the steel pipe flange of the tower body and the long slot hole of the bottom frame 101, after adding the backing plate 103, tighten the nut, and fix the base 1 of the lifting device on the upper plane of the steel pipe flange 8 of the tower body . The bottom frame 101 includes an outer beam and two supporting beams 104 in the middle. The length of the supporting beams 104 is longer than that of the outer beams. The two supporting beams are arranged in parallel.

The conduit hoisting device bracket 2 is mainly composed of a main strut 201 , a rear strut 202 , a beam 203 , an upward slanting strut 204 , a hanging plate 205 , and a round rod climbing rod 206 . Materials such as square steel, channel steel, steel plate, and round steel are adopted, and each part is welded as a whole, and the main strut 201 and the rear strut 202 are welded to the lifting device base 1 . Two main poles 201 and beams 203 form a square frame and are welded vertically on the base 1 of the lifting device. The middle of the main pole 201 is welded with two rear struts 202, and the lower ends of the rear struts 202 are obliquely welded on the base 1 of the lifting device. , to support and stabilize the entire main pole 201, the upper end of the rear pole 202 is welded with two upper inclined poles 204, the upper inclined poles 204 are bent and pre-bent, and then clamped and welded to support the hanging plate 205, and the rear side of the hanging plate 205 is welded On the crossbeam 203, a welded round steel climbing rod 206 is arranged between the two main poles 201 for operators to climb up and down.

The three parts of the catheter hoisting wire rope tackle group are mainly composed of upper connection shackle 301, upper lifting tackle 302, lower lifting tackle 303, lower connecting shackle 304, wire rope 305, and guide tackle 306. The upper lifting tackle 302 is unloaded through the upper connection. The buckle 301 is connected and installed on the hanging plate 205 of the lifting device bracket 2, the lower lifting tackle 303 is connected and installed on the conduit through the lower connection shackle 304, and the upper and lower lifting tackles 302, 303 pass through the wire rope 305 to form a tackle group, the steel wire rope 305 tail rope is introduced into the hoisting rope reel 501 through the guide block 306 at the bottom of the main pole 201 of the support 2.

The 4 parts of the catheter fixing support are mainly composed of a fixed frame 401, a detachable connecting rod 402, and a connecting bolt 403. The fixed frame 401 is welded as a whole with channel steel, and one side is open. The opening size between the channel steel matches the outer diameter of the catheter. , slightly larger than the outer diameter of the conduit, but smaller than the diameter of the clamp 7 welded on the conduit, when the conduit falls, the clamp 7 can be effectively locked on the fixed frame 401, and the fixed frame 401 bears the weight of the conduit, and the opening side of the fixed frame 401 passes through The connecting bolt 403 is installed with the detachable connecting rod 402 to prevent the conduit from sliding out of the fixing frame 401 from the opening side.

The hoisting mechanism 5 is mainly composed of a hoisting rope reel 501, a hoisting gear box 502, and a hoisting motor 503, as shown in FIG. 1 . The hoisting mechanism 5 is fixed on the base 1 of the hoisting device. The hoisting machine motor 503 is driven by electric power, and drives the hoisting rope reel 501 to rotate through the hoisting gear box 502, tightens or loosens the wire rope 305, and then drives the lifting of the wire rope block 3. , Move down, so as to realize the lifting or loosening of the catheter.

A working method of a conduit lifting device used for high-altitude pouring of steel pipe concrete in a power transmission tower is as follows: the conduit lifting device is integrally installed and fixed on the upper plane of the tower body steel pipe flange of the concrete section to be poured. Specifically include the following steps:

6 sections of the conduit are lowered and installed: ① Drive the winch motor 503, hoist the first segment of the conduit from top to bottom, and slowly lower it along the square hole in the conduit fixing support 4 until the clamp 7 on the outer wall of the conduit falls on the conduit fixing support. on the seat 4, that is, the self-weight of the conduit is transmitted to the steel pipe of the tower body through the clamp 7, the fixed support, and the base 1 of the lifting device, until the hoisting wire rope tackle group 3 is not stressed; Bind the connecting rope with the conduit 6, change and hang the second section of conduit, after the connection with the first section of conduit is completed, continue to drive the winch motor 503 to tighten the hoisting rope reel 501, and raise the second section and the first section of conduit as a whole, Until the height of the clip 7 of the first section of the conduit is higher than the fixed support, that is, the self-weight of the conduit is all borne by the hoisting wire rope 305 pulley block; Fix the opening of the frame 401, and temporarily remove the fixed support to avoid affecting the lowering of the catheter; ④ Drive the winch motor 503 to loosen the hoisting rope reel 501, and loosen the height of the clamp 7 of the first section of the catheter lower than the fixed support of the catheter 4. Reinstall the conduit fixing support 4 again, and continue to loosen the hoisting rope reel 501 until the clamp 7 on the outer wall of the second section of conduit falls on the conduit fixing support 4. In this way, the steps from ② to ④ complete the lengthening and lowering work of a section of conduit, and the subsequent lengthening and lowering installation repeats the steps ②—③—④.

Lifting and dismantling of the 6-section conduit: ① Drive the hoisting motor 503 to tighten the hoisting rope reel 501, retract the clamp 7 of the first segment (from top to bottom) higher than the conduit fixing support 4, and loosen the conduit The connecting bolt 403 on the detachable connecting rod 402 of the fixed support 4 opens the opening of the fixed frame 401, and the fixed support is temporarily moved out to avoid affecting the lifting of the catheter; The conduit is raised as a whole until the height of the clamp 7 of the second section of conduit is higher than the fixed support, and the installation of the conduit fixed support 4 is resumed; ③Slowly drive the winch motor 503 to loosen the hoisting rope reel 501 until the second section of conduit The clamp 7 on the outer wall falls on the fixed support 4 of the conduit, that is, the self-weight of the conduit is transferred to the steel pipe of the tower body through the clamp 7, the fixed support, and the base 1 of the lifting device, until the lifting wire rope pulley group 3 is not stressed; ④ Untie Lift the wire rope block group 3 and lower the hoisting block 303 and the binding connection rope of the first section conduit, remove the first section conduit, and lift the wire rope block group 3 for binding on the second section conduit. In this way, the steps from ① to ④ complete the lifting and dismantling of a section of conduit, and the subsequent lifting and dismantling can be repeated by steps ①—②—③—④.

The conduit lifting device and working method for high-altitude pouring of steel pipe concrete for transmission towers shown in Figures 1 and 2 above are specific embodiments of the present invention, which have demonstrated the outstanding substantive features and significant progress of the present invention, and can be used according to actual conditions. Need, under the enlightenment of the present invention, equivalent modification of its shape, structure and other aspects are all within the scope of protection of this scheme.

Claims (10)

1. A conduit lifting device for high-altitude pouring of steel pipe concrete in transmission towers, characterized in that it includes a base, a bracket, a wire rope tackle group, a conduit fixing support, a hoisting mechanism, the support, a wire rope tackle group, a conduit fixing support, The hoisting mechanism is set on the base; the base includes a bottom frame, and the four corners of the bottom frame are provided with long grooves for piercing connectors, and the bottom frame is fixed on the flange of the steel pipe spanning the tower body through the connectors , the support is vertically arranged on the bottom frame, and the support is provided with a wire rope pulley group; the conduit fixing support includes a fixed frame and a connecting rod, and the connecting rod is detachably connected by a connecting piece On the fixed frame, the fixed frame is provided with a conduit hole matched with the conduit, and the size of the conduit hole is larger than the diameter of the conduit and smaller than the clip on the conduit. 2. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 1, characterized in that: the bottom frame is also provided with a backing plate, and the backing plate is provided with stud holes, The studs pass through the round holes of the flange, the long slots of the bottom frame, and the stud holes of the backing plate from bottom to top, and then thread the nuts. 3. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 2, characterized in that: the bottom frame includes an outer beam and two supporting beams in the middle, and the length of the supporting beam is longer than that of the outer beam , two supporting beams are arranged in parallel, and the above-mentioned conduit fixing supports and hoisting mechanisms are arranged on the two supporting beams. 4. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 3, characterized in that: the conduit fixing support is detachably placed on the support beam. 5. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 4, characterized in that: the support includes a main strut, a rear strut, a beam, an upward slanting strut, a hanging plate, Round pole climbing pole, the main support pole is two, the two main support poles are vertically arranged on the bearing beam, the top of the two main support poles is provided with a crossbeam, and the main pole below the crossbeam is provided with a plurality of Climbing poles arranged in parallel; the rear struts are arranged obliquely, the rear struts and the main struts are intersected, and the top of the rear struts is provided with the above-mentioned upwards The plates are connected to the beams. 6. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 5, characterized in that: the hanging plate is vertically arranged with the crossbeam, and the steel wire rope pulley group is arranged under the hanging plate . 7. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 6, characterized in that: two upper diagonal braces are symmetrically arranged on both sides of the hanging plate; the lower ends of the diagonal braces and the rear braces The upper end is fixedly connected, and the lower end of the rear brace is arranged at the end of the bolster. 8. The conduit hoisting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 7, characterized in that: the wire rope block group includes an upper connection shackle, an upper lifting block, a lower lifting block, and a lower connecting block. shackles, wire ropes, and guide blocks; the upper lifting block is connected to the hanging plate through the upper connection shackle; a steel wire rope for lifting is set between the lower lifting block and the upper lifting block, and the hoisting mechanism extends The outgoing steel wire rope is connected with the upper lifting block through the guide block. 9. The conduit lifting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 8, characterized in that: the hoisting mechanism, the conduit fixing support, and the bracket are arranged in sequence in the length direction of the bolster, and the hoisting mechanism is set There are a hoisting base, a hoisting gear box located on the base, a motor, and a hoisting rope reel. The hoisting rope drum is connected to the motor through the hoisting gear box, and the hoisting tackle is driven up and down by the motor. 10. The working method of the conduit hoisting device for high-altitude pouring of steel pipe concrete for transmission towers according to claim 1, characterized in that: it includes the installation of conduits in sections and the installation of conduits in sections and the removal of conduits in sections; 1) The installation steps of the conduits being lowered in sections include: 11) Drive the winch motor, hoist the first section of the conduit from top to bottom, and slowly lower it along the square hole in the conduit fixing support until the clamp on the outer wall of the conduit falls on the conduit fixing support, that is, the conduit passes through the clamp by its own weight. , the fixed support, and the base of the hoisting device are transmitted to the steel pipe of the tower body until the hoisting wire rope pulley block is not stressed; 12) Untie the binding connection rope between the hoisting block and the conduit under the hoisting wire rope block group, and change the second section of conduit. The section and the first section of conduit are raised as a whole until the clamp height of the first section of conduit is higher than the fixed support, that is, the self-weight of the conduit is all borne by the hoisting wire rope tackle group; 13) Loosen the connecting bolts on the detachable connecting rod of the conduit fixing support, open the opening of the fixing frame, and temporarily remove the fixing support to avoid affecting the lowering of the conduit; 14) Drive the hoisting motor to loosen the hoisting rope reel, loosen the clamp height of the first section of conduit lower than the conduit fixing support, restore the installation of the conduit fixing support, and continue to loosen the hoisting rope reel until the second section The clamp on the outer wall of the pipe section falls on the pipe fixing support; in this way, the steps from 12) to 14) complete the lengthening and lowering work of a section of pipe, and the subsequent lengthening and lowering installation repeats steps 12), 13), and 14) ; 2) The steps for segmental lifting and removal of conduits include: 21) Drive the hoisting motor to tighten the hoisting rope reel, close the clamp height of the first segment of the conduit from top to bottom higher than the conduit fixing support, loosen the connecting bolts on the detachable connecting rod of the conduit fixing support, Open the opening of the fixed frame and temporarily remove the fixed support to avoid affecting the lifting of the catheter; 22) Continue to drive the hoisting motor to tighten the hoisting rope reel, raise the conduit as a whole, until the clamp height of the second section of conduit is higher than the fixed support, and restore the installation of the conduit fixed support; 23) Slowly drive the hoisting motor to loosen the hoisting rope reel until the clamp on the outer wall of the second section of the conduit falls on the fixed support of the conduit, that is, the self-weight of the conduit is transmitted to the steel pipe of the tower body through the clamp, the fixed support, and the base of the lifting device up, until the hoisting wire rope blocks are under no force; 24) Untie the binding connection rope between the hoisting block under the hoisting wire rope block group and the first section of conduit, remove the first section of conduit, and replace the hoisting wire rope block assembly on the second section of conduit; so from 21) to 24) The first step is to complete the lifting and removing work of a section of conduit, and then repeat steps 21), 22), 23), and 24) for the subsequent lifting and removing.