Cutting and opening method of concrete chimney

Abstract

A method for cutting and opening a hole in a concrete chimney includes: preparation of a hanger and a displacement frame, erection of a crossbeam and a pulley block, installation of a winch unit, clamping and fixing of a cut concrete block, preparation for lifting and removing the cut concrete block, and lifting and removing the cut concrete block. The present invention builds a lifting and removing system for the cut concrete block on the concrete chimney through the cooperation of the hanger and the displacement frame, as well as the crossbeam, the pulley block and the winch unit. After the concrete block is cut, the concrete block clamped and fixed by the hanger is moved out of the wall of the concrete chimney through the cooperation of the winch unit, the pulley block and the displacement frame, and is lifted and removed to complete the cutting and opening of the concrete chimney. The present invention can efficiently complete the cutting and opening of the concrete chimney without accumulating the concrete blocks on the wall of the chimney or on the scaffolding after the cutting and opening, thereby preventing the accumulated concrete blocks from collapsing and falling, and sudden falling during the process of removing the wall, thereby avoiding the occurrence of injury accidents.

Description

Technical Field

[0001] The invention relates to a concrete cutting and opening method, in particular to a concrete chimney cutting and opening method, and belongs to the technical field of building construction. Background Art

[0002] In some special cases, it is necessary to inspect the interior of the concrete chimney. In this case, it is first necessary to cut a hole in the local wall of the concrete chimney so that the maintenance personnel can enter the interior of the concrete chimney to perform relevant maintenance operations.

[0003] There are many mature existing technologies for cutting concrete walls, but the difficulty and key to cutting and opening holes in the wall of a concrete chimney is that a large number of concrete blocks generated after concrete cutting, if not moved out and removed in time, are very likely to fall from a high altitude, causing damage to lifting equipment and construction workers, affecting normal construction operations and threatening the safety of equipment and construction workers. Therefore, the method of cutting and opening holes in a concrete chimney is mainly restricted by the lifting and removal of concrete blocks.

[0004] However, since the working position when cutting and opening holes in concrete chimneys is usually relatively high and the operating space is very small, it is difficult for conventional lifting machinery to conveniently and quickly lift and remove the cut concrete blocks in time, which makes the cutting and opening of holes in concrete chimneys difficult and dangerous, affecting the progress of construction and the safety of life and property.

[0005] In the prior art, a utility model patent (application number: 201721675958.6) provides a "concrete block lifting structure", which includes multiple top hand winches and multiple horizontal hand winches arranged above the wall to be demolished. The horizontal hand winches are fixedly arranged on the horizontal ground. The concrete blocks are lifted vertically by the top hand winches to transport the concrete blocks to the ground position. The concrete blocks transported to the ground are then transported away from the wall to be demolished by the horizontal hand winches, and the concrete blocks are transported to the transporting device. The concrete blocks are transported by the transporting device to the designated position. After the concrete blocks are transported down from the wall to be demolished, the wall to be demolished is further demolished.

[0006] In addition, the utility model patent (application number: 201721425748.1) discloses a "structural cutting concrete block lifting tool", including a base and a concrete block located on one side of the base, a small mast hoist is fixedly installed on the top side of the base, and a steel strand is connected to the small mast hoist for transmission. One end of the steel strand extends to the outside of the small mast hoist and is fixedly installed with a clip, and the clip is movably connected with a lifting earring, and the lifting earring is fixedly connected with a steel plate, the lifting earring is located in the middle position of the top side of the steel plate, and the lifting earring is provided with four through holes opened on the top side of the steel plate around the lifting earring, and expansion bolts are movably installed in the four through holes, and both ends of the expansion bolts extend outside the through holes, and four expansion bolt holes are opened on the top side of the concrete block, and the four expansion bolts are respectively fixedly installed in the four expansion bolt holes, and the bottom side of the steel plate is in contact with the top side of the concrete block.

[0007] In addition, the utility model patent (application number: 201820956572.0) discloses a "concrete block hoisting device", which includes a hoisting component embedded in the concrete block and a lifting component connected to the hoisting component. The hoisting component includes a fixed cylinder cast in the concrete block, and an internal thread is opened in the fixed cylinder. The lifting component includes a connecting plate, lifting ears rotatably connected to both sides of the connecting plate, and a connecting piece that passes through the middle of the connecting plate and is threadedly connected to the fixed cylinder. The utility model solves the problem that the installation process between the hoisting component and the lifting component is complicated and time-consuming. By threading the hoisting component and the lifting component, the hoisting component and the lifting component are convenient and quick to install.

[0008] Although these patented technologies provide methods and devices for lifting concrete blocks after removal from different levels, they are not very suitable for lifting concrete blocks produced when cutting holes in concrete chimneys, and there is no direct technical inspiration that can be applied to cutting holes in concrete chimneys. Summary of the invention

[0009] In order to overcome the shortcomings of the prior art, an embodiment of the present invention provides a method for cutting and opening a hole in a concrete chimney, the purpose of which is to conveniently and quickly lift and remove concrete blocks generated after cutting and opening a hole in a concrete chimney, avoid accidents such as collapse or falling caused by concrete blocks accumulating on the chimney wall or scaffolding after cutting and opening, and prevent concrete blocks from suddenly falling during the process of removing the wall, causing damage to the chimney body and operators, affecting the opening progress of the concrete chimney, improving work efficiency, and providing methods and inspiration for similar work to obtain corresponding social and economic benefits.

[0010] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0011] A method for cutting and opening a hole in a concrete chimney, characterized by comprising:

[0012] S10) Preparation step of the sling and the displacement frame, wherein:

[0013] The sling comprises an inner clamping plate, an outer clamping plate, bolts and nuts. The inner clamping plate and the outer clamping plate both comprise a bottom plate and a lifting lug. The lifting lug is mounted on the bottom plate. The bottom plate is provided with screw holes. The screw holes are distributed on both sides of the lifting lug. The bolts can be inserted into the screw holes to connect the two clamping plates. The lifting lug is provided with a lifting hole and a pulling hole.

[0014] The displacement frame is a door-shaped frame, including two door posts and a door lintel connecting the top ends of the two door posts, and a horizontal pulling hoist is provided in the middle of the door lintel;

[0015] S20) The step of installing the beam and the pulley block, wherein:

[0016] The crossbeam is erected on the top of the concrete chimney, and one end of the crossbeam protrudes out of the wall at the top of the concrete chimney;

[0017] The pulley block is arranged on the crossbeam, and the pulley block at least comprises an inner pulley located in the concrete chimney, an outer pulley located outside the concrete chimney wall, and a displacement frame hoisting pulley located outside the inner pulley or the outer pulley centered on the wall;

[0018] S30) The installation steps of the winch assembly include:

[0019] The hoisting unit comprises an internal chimney hoist installed in the concrete chimney, an external chimney hoist installed outside the concrete chimney, and a displacement frame suspension hoist installed on the ground on a side corresponding to the lifting pulley of the displacement frame;

[0020] S40) The step of clamping and fixing the cut concrete block comprises:

[0021] S41) drilling two through holes corresponding to the screw holes at the upper center of the concrete block to be cut;

[0022] S42) attaching the inner plywood and the outer plywood to both sides of the concrete block to be cut, respectively, wherein the inner plywood is located inside the concrete chimney, and the outer plywood is located outside the wall of the concrete chimney, and the screw holes on the inner plywood and the outer plywood are aligned with the through holes;

[0023] S43) inserting the bolts between the screw holes of the inner and outer clamping plates and the through holes on the concrete block, and then tightening them with nuts, thereby completing the clamping and fixing of the cut concrete block;

[0024] S50) the preparation step for cutting the concrete block and lifting it for removal comprises:

[0025] S51) connecting the steel cable of the hoist in the chimney through the inner pulley and the lifting hole of the inner clamping plate;

[0026] S52) connecting the steel cable of the chimney outer winch through the outer pulley and the lifting hole of the outer clamping plate;

[0027] S53) the steel cable of the displacement frame suspension hoist is suspended through the displacement frame lifting pulley, and then the displacement frame is horizontally suspended by connecting radial ropes, and the bottom end of the displacement frame door post is against the wall of the concrete chimney;

[0028] S54) connecting one end of the rope passing through the horizontal pulling hoist to the pulling hole of the lifting ear;

[0029] S60) The step of lifting and removing the cut concrete blocks comprises:

[0030] S61) cutting the clamped and fixed concrete block using a concrete block cutting method in the prior art;

[0031] S62) simultaneously starting the chimney inner hoist and the chimney outer hoist to slightly lift the cut concrete block;

[0032] S63) pulling the other end of the horizontal pulling hoist rope to slowly move the cut concrete block out of the wall of the concrete chimney, and at the same time, operating the chimney inner hoist and the chimney outer hoist to keep the concrete block balanced;

[0033] S64) After the concrete block is completely moved out of the wall, the chimney inner hoist or the chimney outer hoist on the opposite side of the concrete block is slowly unhooked, and the steel cable is released after it is completely free of force;

[0034] S65) starting the chimney inner hoist or the chimney outer hoist still suspending the concrete block, slowly hanging the concrete block to the ground, and then transporting the concrete block away by a ground transportation device;

[0035] S66) Repeat steps S40) to S65) until all concrete blocks of the concrete chimney that need to be opened are cut off and transported away, that is, the cutting and opening of the concrete chimney is completed.

[0036] Furthermore, the angle between the door post and the door lintel of the displacement frame is 90-145°.

[0037] Furthermore, a triangular support frame is provided at the bottom of the door post of the displacement frame.

[0038] Furthermore, a steering pulley is provided on the crossbeam, and the steering pulley is located on the outside of the displacement frame lifting pulley centered on the wall. The steel cable of the displacement frame suspension winch is first turned by the steering pulley and then suspended by the displacement frame lifting pulley and connected to the radial rope to suspend the displacement frame horizontally.

[0039] Furthermore, the displacement frame is made of square steel.

[0040] Furthermore, the bottom plate is made of a circular or elliptical steel plate.

[0041] Furthermore, the horizontal pulling hoist is a hand chain hoist with a specification of 5 tons.

[0042] Compared with the prior art, the beneficial effects and significant improvements of the embodiments of the present invention are:

[0043] 1) A method for cutting and opening a hole in a concrete chimney provided in an embodiment of the present invention firstly comprises the steps of preparing a sling and a displacement frame, erecting a beam and a pulley block, installing a winch unit, and preparing for lifting and removing the cut concrete block, setting up a system for lifting and removing the cut concrete block on the concrete chimney, and completing the preparation for lifting and removing the cut concrete block, then cutting the concrete block on the concrete chimney using a concrete block cutting method in the prior art, and then completing the cutting and opening of the concrete chimney through the step of lifting and removing the cut concrete block;

[0044] 2) The method for cutting and opening a hole in a concrete chimney provided by the embodiment of the present invention is simple and convenient in the whole operation process, the devices and apparatus involved are simple to manufacture, the materials used are common and cheap, and the concrete blocks cut from the concrete chimney can be quickly and efficiently lifted off, so as to avoid the accumulation of concrete blocks on the chimney wall or on the scaffolding after the cutting and opening, and to prevent the collapse and fall of concrete blocks, as well as the sudden fall of concrete blocks during the process of removing the concrete blocks from the wall, which may cause damage to the chimney body and the operators;

[0045] 3) The method for cutting and opening holes in a concrete chimney provided in the embodiment of the present invention is not only highly efficient, safe in construction, simple and convenient, and uses less mechanical equipment, which can reduce a large amount of construction costs, but also the whole method has a clear idea, is specific and detailed, and is ingenious, with strong versatility and operability. It can not only complete the cutting and opening of concrete chimneys efficiently and quickly, but also is inspiring and instructive for similar work. While obtaining economic benefits for the enterprise, it can also obtain corresponding social benefits. Therefore, it is of great value for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only drawings of some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor, but these other drawings also belong to the drawings required for use in the embodiments of the present invention.

[0047] Figure 1 A schematic block diagram of a process of cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention;

[0048] Figure 2 A schematic diagram of the three-dimensional structure of a hanger in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the three-dimensional structure of a displacement frame in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention;

[0050] Figure 4 A schematic diagram of the working state of a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention;

[0051] Figure 5 A schematic diagram of the operation of a displacement frame in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention.

[0052] In the figure:

[0053] 10-hanging device, 11-bolt, 12-nut, 13-bottom plate, 131-screw hole, 14-lifting ear, 141-lifting hole, 142-pulling hole;

[0054] 20-displacement frame, 21-door post, 22-door lintel, 23-horizontal pulling hoist;

[0055] 30- beam;

[0056] 40 - wall, 41 - concrete block;

[0057] 51-inner pulley, 52-outer pulley, 53-lifting pulley of displacement frame, 54-steering pulley;

[0058] 61- internal winch of chimney, 62- external winch of chimney, 63- displacement frame suspension winch. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution, beneficial effects and significant progress of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the drawings provided in the embodiments of the present invention. Obviously, all the described embodiments are only partial embodiments of the present invention, rather than all embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0060] It should be noted that:

[0061] The terms "first", "second", etc. in the specification and claims of the present invention and the drawings of the embodiments of the present invention are only used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any variation thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0062] It should be understood that in the description of the embodiments of the present invention, some indicative orientation or position words used are only based on the orientation or position relationship shown in the drawings of the embodiments of the present invention, and are for the convenience of describing the embodiments of the present invention and simplifying the explanation, rather than indicating or implying the specific orientation, specific orientation structure and operation that the device or element described must have. Therefore, it should not be understood as a limitation of the present invention.

[0063] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "connection" and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited.

[0064] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] It should also be noted that:

[0066] The following specific embodiments may be combined with each other, and the same or similar concepts or processes therein may not be described in detail in some embodiments.

[0067] The technical solution of the present invention is described in detail below with specific embodiments.

[0068] Example

[0069] like Figure 1 A schematic diagram of a process of cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention is shown in:

[0070] A method for cutting and opening a hole in a concrete chimney, comprising:

[0071] S10) preparation step of the sling and the displacement frame;

[0072] S20) Steps for installing beams and pulley blocks;

[0073] S30) Installation steps of the winch unit;

[0074] S40) a step of clamping and fixing the cut concrete block;

[0075] S50) a preparation step for cutting the concrete block and lifting and removing it;

[0076] S60) A step of lifting and removing the cut concrete blocks.

[0077] like Figure 2 A schematic diagram of the three-dimensional structure of a hanger in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention is shown as follows:

[0078] The sling 10 includes an inner plate, an outer plate, a bolt 11 and a nut 12. Both the inner plate and the outer plate include a base plate 13 and a lifting ear 14. The lifting ear 14 is installed on the base plate 13. The base plate 13 is provided with screw holes 131. The screw holes 131 are distributed on both sides of the lifting ear 14. The bolt 11 can be inserted into the screw holes 131 to connect the two plates. The lifting ear 14 is provided with a lifting hole 141 and a pulling hole 142.

[0079] like Figure 3 A schematic diagram of the three-dimensional structure of a displacement frame in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention is shown as follows:

[0080] The displacement frame 20 is a door-shaped frame, including two door posts 21 and a door lintel 22 connecting the top ends of the two door posts 21 , and a horizontal pulling hoist 23 is provided in the middle of the door lintel 22 .

[0081] like Figure 4 A schematic diagram of a working state of a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention, Figure 5 A schematic diagram of the working of a displacement frame in a method for cutting and opening a hole in a concrete chimney provided by an embodiment of the present invention is shown as follows:

[0082] The cross beam 30 is erected on the top of the concrete chimney, and one end of the cross beam 30 protrudes out of the wall 40 on the top of the concrete chimney;

[0083] The pulley block is arranged on the cross beam 30, and the pulley block at least comprises an inner pulley 51 located in the concrete chimney, an outer pulley 52 located outside the concrete chimney wall 40, and a displacement frame hoisting pulley 53 located outside the inner pulley 51 or the outer pulley 52 centered on the wall 40;

[0084] The winch assembly includes an internal chimney winch 61 installed in the concrete chimney, an external chimney winch 62 installed outside the concrete chimney, and a displacement frame suspension winch 63 installed on the ground on the side corresponding to the displacement frame lifting pulley 53 .

[0085] In this embodiment, the clamping and fixing steps of the cut concrete block include:

[0086] S41) drilling two through holes corresponding to the screw holes 131 in the upper center of the concrete block 41 to be cut;

[0087] S42) attaching an inner plywood and an outer plywood to both sides of the concrete block 41 to be cut, respectively, the inner plywood is located inside the concrete chimney, and the outer plywood is located outside the concrete chimney wall 40, and aligning the respective screw holes 131 on the inner plywood and the outer plywood with the through hole;

[0088] S43) The bolts 11 are inserted between the screw holes 131 of the inner and outer clamping plates and the through holes on the concrete block, and then tightened with nuts 12, thereby completing the clamping and fixing of the cut concrete block.

[0089] In this embodiment, the preparation steps for removing the cut concrete block include:

[0090] S51) connecting the steel cable of the hoist 61 in the chimney through the inner pulley 51 and the lifting hole 141 of the inner clamping plate;

[0091] S52) connecting the steel cable of the chimney outer hoist 62 through the outer pulley 52 and the lifting hole 141 of the outer clamping plate;

[0092] S53) The steel cable of the displacement frame suspension hoist 63 is suspended through the displacement frame lifting pulley 53, and then the displacement frame 20 is horizontally suspended by connecting radial ropes, and the bottom end of the displacement frame door post 21 is against the wall 40 of the concrete chimney;

[0093] S54) connects one end of the rope passing through the horizontal pulling hoist 23 to the pulling hole 142 of the lifting eye 14.

[0094] In this embodiment, the step of lifting and removing the cut concrete blocks includes:

[0095] S61) cutting the clamped concrete block 41 using a concrete block cutting method in the prior art;

[0096] S62) simultaneously starting the chimney inner hoist 61 and the chimney outer hoist 62 to slightly lift the cut concrete block 41;

[0097] S63) pulling the other end of the rope of the horizontal pulling hoist 23 to slowly move the cut concrete block 41 out of the wall 40 of the concrete chimney, while at the same time, operating the chimney inner hoist 61 and the chimney outer hoist 62 to keep the concrete block 41 balanced;

[0098] S64) After the concrete block 41 is completely moved out of the wall 40, the chimney inner hoist 61 or the chimney outer hoist 62 on the opposite side of the concrete block 41 is slowly unhooked, and the steel cable is released after it is completely free of force;

[0099] S65) starting the chimney inner hoist 61 or the chimney outer hoist 62 still suspending the concrete block 41, slowly hanging the concrete block 41 to the ground, and then transporting the concrete block 41 away by a ground transportation device;

[0100] S66) Repeat steps S41) to S65) until all the concrete blocks 41 of the concrete chimney that need to be opened are cut off and transported away, that is, the cutting and opening of the concrete chimney is completed.

[0101] In the implementation process of the above embodiment, if Figure 5 As shown, the angle between the door post 21 and the door lintel 22 of the displacement frame 20 can be maintained between 90 and 145 degrees, so that the displacement frame 20 can have a stronger supporting force and supporting effect.

[0102] Further, such as Figure 3 As shown, a triangular support frame 24 may be further provided at the bottom of the door column 21 of the displacement frame 20 .

[0103] Further, such as Figure 4 As shown: a steering pulley 54 is also provided on the crossbeam 30, and the steering pulley 54 is located on the outside of the displacement frame lifting pulley 53 centered on the wall 40. The steel cable of the displacement frame suspension winch 63 is first turned by the steering pulley 54 and then suspended by the displacement frame lifting pulley 53 to be connected with the radial rope to suspend the displacement frame 20 horizontally. In this way, the force of the displacement frame suspension winch 63 can be further improved, making the suspension of the displacement frame more stable.

[0104] In this embodiment:

[0105] The displacement frame 20 can be made of square steel; the bottom plate 13 can be made of a circular or oval steel plate; the horizontal pulling hoist 23 can be a hand chain hoist with a specification of 5 tons.

[0106] From the above description, we can see that:

[0107] First, the present embodiment provides a method for cutting and opening a hole in a concrete chimney. First, a system for lifting and removing the cut concrete block is built on the concrete chimney through the steps of preparing a sling and a displacement frame, erecting a beam and a pulley block, installing a winch unit, and preparing for lifting and removing the cut concrete block. The preparation for lifting and removing the cut concrete block is completed. Then, the concrete block on the concrete chimney is cut using the concrete block cutting method in the prior art. Then, the cutting and opening of the concrete chimney is completed through the step of lifting and removing the cut concrete block.

[0108] Secondly, the method for cutting and opening a hole in a concrete chimney provided in this embodiment is simple and convenient in the entire operation process, the devices and instruments involved are simple to manufacture, the materials used are common and cheap, and the concrete blocks cut from the concrete chimney can be quickly and efficiently lifted off to avoid the accumulation of concrete blocks on the chimney wall or on the scaffolding after the cutting and opening, and to prevent the collapse and falling of concrete blocks, as well as the sudden falling of concrete blocks during the process of being removed from the wall, which may cause damage to the chimney body and the operators.

[0109] In summary, we can see that:

[0110] The method for cutting and opening holes in a concrete chimney provided in the embodiment of the present invention has clear ideas, a specific and detailed method, and is ingenious, and has strong versatility and operability. It not only has high work efficiency, safe construction, simplicity and convenience, and uses less mechanical equipment, but can also reduce a lot of construction costs, and can efficiently and quickly complete the cutting and opening of the concrete chimney. It is also inspiring and instructive for similar work, and can obtain economic benefits for the enterprise while obtaining corresponding social benefits. Therefore, it is of great value for promotion and application.

[0111] In the description of the above manual:

[0112] The terms "this embodiment", "an embodiment of the present invention", "as shown in", "further", etc., mean that the specific features, structures, materials or characteristics described in the embodiment or example are included in at least one embodiment or example of the present invention;

[0113] In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined or combined in a suitable manner in any one or more embodiments or examples; in addition, a person skilled in the art may combine or combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without causing any contradiction.

[0114] Finally, it should be noted that:

[0115] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. The non-essential improvements, adjustments or replacements made by those skilled in the art based on the contents of this specification are all within the scope of protection required by the present invention.

Claims

1. A method for cutting and opening a hole in a concrete chimney, characterized in that: include: S10) Preparation step of the sling and the displacement frame, wherein: The sling comprises an inner clamping plate, an outer clamping plate, bolts and nuts. The inner clamping plate and the outer clamping plate both comprise a bottom plate and a lifting lug. The lifting lug is mounted on the bottom plate. The bottom plate is provided with screw holes. The screw holes are distributed on both sides of the lifting lug. The bolts can be inserted into the screw holes to connect the two clamping plates. The lifting lug is provided with a lifting hole and a pulling hole. The displacement frame is a door-shaped frame, including two door posts and a door lintel connecting the top ends of the two door posts, and a horizontal pulling hoist is provided in the middle of the door lintel; S20) The step of installing the beam and the pulley block, wherein: The crossbeam is erected on the top of the concrete chimney, and one end of the crossbeam protrudes out of the wall at the top of the concrete chimney; The pulley block is arranged on the crossbeam, and the pulley block at least comprises an inner pulley located in the concrete chimney, an outer pulley located outside the concrete chimney wall, and a displacement frame hoisting pulley located outside the inner pulley or the outer pulley centered on the wall; S30) The installation steps of the winch assembly include: The hoisting unit comprises an internal chimney hoist installed in the concrete chimney, an external chimney hoist installed outside the concrete chimney, and a displacement frame suspension hoist installed on the ground on a side corresponding to the lifting pulley of the displacement frame; S40) The step of clamping and fixing the cut concrete block comprises: S41) drilling two through holes corresponding to the screw holes at the upper center of the concrete block to be cut; S42) attaching the inner plywood and the outer plywood to both sides of the concrete block to be cut, respectively, wherein the inner plywood is located inside the concrete chimney, and the outer plywood is located outside the wall of the concrete chimney, and the screw holes on the inner plywood and the outer plywood are aligned with the through holes; S43) inserting the bolts between the screw holes of the inner and outer clamping plates and the through holes on the concrete block, and then tightening them with nuts, thereby completing the clamping and fixing of the cut concrete block; S50) the preparation step for cutting the concrete block and lifting it for removal comprises: S51) connecting the steel cable of the hoist in the chimney through the inner pulley and the lifting hole of the inner clamping plate; S52) connecting the steel cable of the chimney outer winch through the outer pulley and the lifting hole of the outer clamping plate; S53) passing the steel cable of the displacement frame suspension winch through the displacement frame lifting pulley and then suspending the displacement frame horizontally by connecting radial ropes, and making the bottom end of the displacement frame door post against the wall of the concrete chimney; S54) connecting one end of the rope passing through the horizontal pulling hoist to the pulling hole of the lifting ear; S60) The step of lifting and removing the cut concrete blocks comprises: S61) cutting the clamped and fixed concrete block using a concrete block cutting method; S62) simultaneously starting the chimney inner hoist and the chimney outer hoist to slightly lift the cut concrete block; S63) pulling the other end of the horizontal pulling hoist rope to slowly move the cut concrete block out of the wall of the concrete chimney, and at the same time, operating the chimney inner hoist and the chimney outer hoist to keep the concrete block balanced; S64) After the concrete block is completely moved out of the wall, the chimney inner hoist or the chimney outer hoist on the opposite side of the concrete block is slowly unhooked, and the steel cable is released after it is completely free of force; S65) starting the chimney inner hoist or the chimney outer hoist still suspending the concrete block, slowly hanging the concrete block to the ground, and then transporting the concrete block away by a ground transportation device; S66) Repeat steps S40) to S65) until all concrete blocks of the concrete chimney that need to be opened are cut off and transported away, that is, the cutting and opening of the concrete chimney is completed.

2. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: The angle between the door post and the door lintel of the displacement frame is 90-145°.

3. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: The bottom of the door post of the displacement frame is also provided with a triangular support frame.

4. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: A steering pulley is also provided on the crossbeam, and the steering pulley is located on the outside of the displacement frame lifting pulley centered on the wall. The steel cable of the displacement frame suspension winch is first turned by the steering pulley and then suspended by the displacement frame lifting pulley and connected to the radial rope to suspend the displacement frame horizontally.

5. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: The displacement frame is made of square steel.

6. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: The bottom plate is made of a circular or oval steel plate.

7. The method for cutting and opening a hole in a concrete chimney according to claim 1, characterized in that: The horizontal pulling hoist is a hand chain hoist with a specification of 5 tons.

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