Method for hoisting tubular seat of bulb tubular turbine unit in narrow space

Abstract

The invention discloses a method for hoisting a tubular seat of a bulb tubular turbine unit in a narrow space, and belongs to the technical field of hydroelectric power generation equipment. According to the method for hoisting the tubular base of the bulb tubular unit in the narrow and small space, hoisting of the tubular base of the bulb tubular unit can be smoothly completed in the narrow and small space, the feasibility and efficiency of construction are improved, interference to the surrounding environment and other construction activities is reduced through the small first hoisting equipment and the small second hoisting equipment, and the construction cost is reduced. The construction cost is reduced; and accurate hoisting and in-place operation are realized through the first hoisting equipment and the second hoisting equipment, so that the precision and efficiency of hoisting operation are effectively improved, the mounting precision of the tubular seat is ensured, the operation stability of a unit is improved, the safety risk in the construction process is effectively controlled, and the safety of personnel and equipment is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of hydroelectric power generation equipment, and in particular to a method for hoisting a bulb tubular seat of a through-flow unit in a narrow space. Background Art

[0002] When installing the bulb cross-flow unit, usually before the plant bridge crane is built, people will use some traditional large-scale lifting equipment to complete the lifting task of the tubular seat. These traditional methods often require a large working space, and the cost of using these lifting equipment is relatively high. In addition, due to the unique structural characteristics of the bulb cross-flow unit, very strict requirements are placed on the accuracy and stability of the lifting operation. Due to the large radius of on-site lifting operations, the existing lifting equipment cannot meet the lifting requirements. Therefore, it is considered to lift at close range in the water inlet channel with a relatively narrow working space. Traditional lifting equipment is often limited by space when lifting the tubular seat and is difficult to use, resulting in difficulty in construction, low efficiency, and certain safety risks. Summary of the invention

[0003] The present application aims to solve one of the above technical problems in the prior art. To this end, the present application provides a method for hanging a bulb through-flow unit tubular seat in a narrow space.

[0004] According to an embodiment of the present application, a method for hanging a bulb through-flow unit tubular socket in a narrow space is provided, comprising the following steps:

[0005] Measuring and analyzing the water inlet flow channel to determine the layout position and activity range of the first lifting equipment in the water inlet flow channel;

[0006] Fix the first column delivered to the position;

[0007] After the first inner cone is delivered to the position, the first lifting device and the second lifting device cooperate to adjust the first connector of the first inner cone to be horizontal and facing downward, and the first lifting device lifts the adjusted first connector to dock with the first column;

[0008] After the second inner cone is delivered to the position, the first lifting device and the second lifting device cooperate to adjust the second connector of the second inner cone to be horizontal and upward, and the first lifting device lifts the adjusted first inner cone to dock with the first inner cone to form an inner cone body;

[0009] The second upright column delivered to the position is hoisted until it is docked with the second connector;

[0010] The outer vertebral body segments are transported in sequence, and the outer vertebral body segments are hoisted to the outside of the inner vertebral body from bottom to top in sequence to form the outer vertebral body.

[0011] The method for hoisting the tubular seat of the bulb cross-flow unit in the above-mentioned narrow space has at least the following beneficial effects: the construction method of the present application can smoothly complete the hoisting of the tubular seat of the bulb cross-flow unit in a narrow space, thereby improving the feasibility and efficiency of the construction, wherein the use of a small first lifting equipment and a second lifting equipment reduces interference with the surrounding environment and other construction activities, and reduces construction costs; and precise lifting and positioning operations are achieved through the first lifting equipment and the second lifting equipment, thereby effectively improving the accuracy and efficiency of the lifting operation, ensuring the installation accuracy of the tubular seat, and improving the operating stability of the unit. The safety risks during the construction process are effectively controlled, thereby ensuring the safety of personnel and equipment.

[0012] According to the method for hanging a bulb flow unit tubular seat in a narrow space described in an embodiment of the present application, the first inner cone and the second inner cone are both transported by a flatbed truck. During transportation, the first inner cone and the second inner cone are both placed upside down on the flatbed truck.

[0013] According to the method for hoisting a tubular seat of a bulb flow unit in a narrow space described in an embodiment of the present application, the first lifting device is a folding boom, and the second lifting device is a truck crane.

[0014] According to the method for hanging a tubular seat of a bulb flow unit in a narrow space described in an embodiment of the present application, a first connecting part is provided at one end of the first inner cone, and a second connecting part is provided at the first connecting body at the other end of the first inner cone. When the posture of the first inner cone is adjusted, the first main hook of the first lifting equipment is connected to the first connecting part through a steel wire rope, and the second main hook of the second lifting equipment is connected to the second connecting part through a steel wire rope.

[0015] According to the method for hoisting a tubular seat of a bulb flow unit in a narrow space as described in an embodiment of the present application, a traction rope is provided at the other end of the first inner cone, and a hand winch is provided on the traction rope. The hand winch is connected to the first lifting equipment. When the first inner cone is hoisted to the first column, the vertical state of the first connector is adjusted by the hand winch and the traction rope.

[0016] According to the method for hanging a tubular seat of a bulb flow unit in a narrow space described in an embodiment of the present application, a third connecting part is provided at one end of the second inner cone, and a fourth connecting part is provided at the second connecting body at the other end of the second inner cone. When the posture of the second inner cone is adjusted, the first main hook of the first lifting equipment is connected to the fourth connecting part through a steel wire rope, and the second main hook of the second lifting equipment is connected to the third connecting part through a steel wire rope.

[0017] According to the method for hoisting a tubular seat of a bulb flow unit in a narrow space as described in an embodiment of the present application, a traction rope is provided at the other end of the second inner cone, and a hand winch is provided on the traction rope. The hand winch is connected to the first lifting equipment. When the second inner cone is hoisted until it is closed with the first inner cone, the vertical state of the second connector is adjusted by the hand winch and the traction rope.

[0018] According to the method for hanging a bulb flow unit tubular seat in a narrow space as described in an embodiment of the present application, after the inner cone bodies are docked, the height and center of the first inner cone and the second inner cone are adjusted by a jack and a tensioner, wherein the first connector and the second connector are collinear.

[0019] According to the method for hoisting a bulb flow unit tubular seat in a narrow space described in an embodiment of the present application, the second column is hoisted by the first lifting equipment to dock with the second connector, the second column and the second connector are fixed by a connecting plate, and the second column is collinear with the first column.

[0020] According to the method for hanging a bulb flow unit tubular seat in a narrow space described in an embodiment of the present application, during the hanging process of the outer cone segment, an adjustment rope is provided on the outer cone segment, and the adjustment rope is used for adjusting the posture of the outer cone segment.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application is further described below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 is a schematic diagram of a first lifting device in an embodiment of the present application in a water inlet channel;

[0024] Figure 2 It is a structural schematic diagram of a hoisting column of a first lifting equipment in an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of a first lifting device hoisting a first inner vertebral body in an embodiment of the present application;

[0026] Figure 4 Schematic diagram of the first inner vertebral structure hoisted by the first lifting device and the second lifting device in the embodiment of the present application Figure 1 ;

[0027] Figure 5 Schematic diagram of the first inner vertebral structure hoisted by the first lifting device and the second lifting device in the embodiment of the present application Figure 2 ;

[0028] Figure 6 In the embodiment of the present application, the first lifting device and the second lifting device are used to lift the second inner vertebral structure. Figure 1 ;

[0029] Figure 7 In the embodiment of the present application, the first lifting device and the second lifting device are used to lift the second inner vertebral structure. Figure 2

[0030] Figure 8 This is a schematic diagram of the outer cone hoisting in the embodiment of the present application. Figure 1 ;

[0031] Fig. 9 This is a schematic diagram of the outer cone hoisting in the embodiment of the present application. Figure 2 ;

[0032] Fig.10 This is a schematic diagram of the outer cone hoisting in the embodiment of the present application. Figure 3 ;

[0033] Fig.11 This is a schematic diagram of the outer cone hoisting in the embodiment of the present application. Figure 4 .

[0034] Figure numerals: water inlet channel 100, tubular seat foundation 110, first lifting equipment 200, first main hook 210, hand hoist 220, first column 310, first inner cone 410, first connecting body 411, second inner cone 420, second connecting body 421, second main hook 510, first section 610, second section 620, third section 630, fourth section 640. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0039] Reference Figure 1 In the embodiment of the present application, when the factory building bridge crane has not yet been built, a water inlet channel 100 is set therein, and the navigable passage in the water inlet channel 100 is limited, because traditional large-scale lifting equipment needs to occupy a large working space for lifting tasks, and the cost of using these lifting equipment is relatively high.

[0040] In addition, due to the unique structural characteristics of the bulb flow unit, there are very strict requirements on the accuracy and stability of the hoisting operation. Since the traditional large-scale hoisting equipment has a large on-site hoisting operation radius, it cannot meet the low-cost hoisting requirements, the accuracy and stability of the hoisting operation are difficult to guarantee, and the cost is high. In addition, the use of large-scale hoisting equipment limits the working environment, and there are great difficulties in installation operations in small spaces or special environments.

[0041] To this end, the present application provides a method for hanging a bulb tubular holder in a narrow space, which specifically includes the following steps:

[0042] Measuring and analyzing the water inlet channel 100 to determine the arrangement position and activity range of the first lifting device 200 in the water inlet channel 100;

[0043] Fix the first column 310 delivered to the position;

[0044] After the first inner cone is delivered to the position, the first lifting device 200 and the second lifting device cooperate to adjust the first connector 411 of the first inner cone to be horizontal and facing downward, and the first lifting device 200 lifts the adjusted first connector 411 to dock with the first column 310;

[0045] After the second inner cone 420 is delivered to the position, the first lifting device 200 and the second lifting device cooperate to adjust the second connecting body 421 of the second inner cone 420 to be horizontal and upward, and the first lifting device 200 lifts the adjusted first inner cone to dock with the first inner cone to form the inner cone body;

[0046] The second column delivered to the position is hoisted until it is docked with the second connector 421;

[0047] The outer vertebral body segments are transported in sequence, and are hoisted to the outside of the inner vertebral body from bottom to top in sequence to form the outer vertebral body.

[0048] The construction method of the present application can successfully complete the hoisting of the tubular seat of the bulb cross-flow unit in a small space, thereby improving the feasibility and efficiency of the construction. The use of a small first lifting device 200 and a second lifting device reduces interference with the surrounding environment and other construction activities, thereby reducing construction costs. Accurate lifting and positioning operations are achieved through the first lifting device 200 and the second lifting device, thereby effectively improving the accuracy and efficiency of the hoisting operation, ensuring the installation accuracy of the tubular seat, improving the operating stability of the unit, and effectively controlling the safety risks during the construction process, thereby ensuring the safety of personnel and equipment.

[0049] In some embodiments, the first inner vertebral body and the second inner vertebral body 420 are both transported by a flatbed truck. During transportation, the first inner vertebral body and the second inner vertebral body 420 are both inverted on the flatbed truck. The inverted transportation method can avoid the situation where the center of the vertebral body is unstable or rolls over and slides off the flatbed truck during transportation.

[0050] In some embodiments, the first lifting device 200 is a folding boom, and the second lifting device is a truck crane.

[0051] When constructing the method for hoisting the tubular seat of the bulb flow unit in a narrow space in the embodiment of the present application, adjust the arm of the folding arm crane to a suitable angle and position; adjust the arm length and angle of the folding arm crane according to the site environment and the size of the tubular seat to ensure the safety and stability of the hoisting process. Then, operate the folding arm crane to smoothly lift the tubular seat from the ground and move it above the installation position. Then, use the telescopic function of the folding arm to smoothly lift the spare parts of the tubular seat that have been delivered to the location and move them to the installation position; finally, slowly lower the hook to accurately place the spare parts of the tubular seat in the predetermined position. This method utilizes the flexibility and precise control of the folding arm crane to effectively improve the accuracy and efficiency of the hoisting operation.

[0052] Consider the crane's lifting capacity, on-site road safety, economic benefits and other factors, and select a crane based on the weight, geometric dimensions and installation height of the objects on site. When the folding arm crane is loaded, the main arm can be extended and retracted, which is suitable for lifting in a small space.

[0053] In some embodiments, before hoisting the first column 310, the jack, tensioner, reinforcement, tools and other construction equipment are hoisted into the pit for use; the pier of the first column 310 and the installation surface of the tubular base 110 are cleaned, and the jacks are arranged according to the elevation. The lower column weighs 6 tons and is hoisted directly into the pit by a tower crane, the anchor bolts are installed, and the lower column is preliminarily adjusted and reinforced.

[0054] Then the first inner cone is transported. The first inner cone 410 is transported to the water inlet channel 100 by a 13m flatbed truck. After the first inner cone 410 is in place, the second inner cone is transported to the water inlet channel 100.

[0055] In some embodiments, a first connection portion is provided at one end of the first inner cone, and a second connection portion is provided at the first connector 411 at the other end of the first inner cone. Specifically, the first connection portion can be a lifting ear or a screw hole installation buckle near the combined flange of the first inner cone, and the second connection portion can be a lifting ear.

[0056] A traction rope is provided at the other end of the first inner cone, on which a hand winch 220 is provided. The hand winch 220 is connected to the first lifting device 200. When the first inner cone is hoisted to the first column 310, the vertical state of the first connector 411 is adjusted by the hand winch 220 and the traction rope.

[0057] like Figures 2 to 5 As shown, when the posture of the first inner cone is adjusted by the first lifting device 200 and the second lifting device, the first main hook 210 of the first lifting device 200 is connected to the first connection part by a steel wire rope, and the second main hook 510 of the second lifting device is connected to the second connection part by a steel wire rope. The first main hook 210 of the first lifting device 200 and the second main hook 510 of the second lifting device are slowly lifted in parallel at the same time. After lifting to a certain height, the first main hook 210 of the first lifting device 200 is slowly lifted while the second main hook 510 of the second lifting device is slowly lowered to turn the first inner cone, and the full-time commander visually commands until the first inner cone 410 is turned to an upright hoisting state.

[0058] After the first inner cone 410 is flipped to an upright hoisting state and lifted to a certain height, the folding arm crane rotates the main arm so that the first inner cone 410 is above the installation position. The commander visually commands the main hook and fine-tuning of the folding arm crane. The hook should be lowered slowly and not too quickly. At the same time, the traction rope should be pulled to avoid collision with the wall. When it is lowered to almost contact the first column 310, the specific installation position and direction are adjusted again. After the specific position is determined, it is lowered again so that the first connector 411 of the first inner cone 410 is connected to the first column 310. After the hook of the folding arm is lowered to the point where it is no longer under force, the connecting plate is welded between the first inner cone 410 and the first column 310. The hook can be loosened only after reinforcement is completed.

[0059] After the first inner vertebral body is hoisted, the second inner vertebral body 420 is hoisted. The hoisting process of the second inner vertebral body 420 is similar to the hoisting process of the first inner vertebral body.

[0060] Specifically, a third connection part is provided at one end of the second inner cone 420, and a fourth connection part is provided at the second connection body 421 at the other end of the second inner cone 420. When the posture of the second inner cone 420 is adjusted, the first main hook 210 of the first lifting device 200 is connected to the fourth connection part through a steel wire rope, and the second main hook 510 of the second lifting device is connected to the third connection part through a steel wire rope. Specifically, the third connection part can be a lifting lug or a screw hole installation shackle near the combination flange of the first inner cone, and the fourth connection part can be a lifting lug.

[0061] A traction rope is provided at the other end of the second inner cone 420, on which a hand winch 220 is provided. The hand winch 220 is connected to the first lifting device 200. When the second inner cone 420 is hoisted to be closed with the first inner cone, the vertical state of the second connecting body 421 is adjusted by the hand winch 220 and the traction rope.

[0062] like Figure 6 and Figure 7 As shown, when the posture of the second inner cone 420 is adjusted by the first lifting device 200 and the second lifting device, the first main hook 210 of the first lifting device 200 is connected to the fourth connection part through a steel wire rope, and the second main hook 510 of the second lifting device is connected to the third connection part through a steel wire rope. The first main hook 210 of the first lifting device 200 and the second main hook 510 of the second lifting device are slowly lifted in parallel at the same time. After lifting to a certain height, the first main hook 210 of the first lifting device 200 is slowly lifted while the second main hook 510 of the second lifting device is slowly lowered to turn the second inner cone 420, and the full-time commander visually commands until the second inner cone is turned to an upright hoisting state.

[0063] After the second inner cone is flipped to an upright hoisting state and lifted to a certain height, the folding arm crane rotates the main arm so that the second inner cone is above the installation position. The commander visually directs the main hook and fine-tuning of the folding arm crane. The hook should be lowered slowly and not too quickly. At the same time, the traction rope should be pulled to avoid collision with the wall. When it is lowered to almost contact the joint surface of the first inner cone, the specific installation position and direction are adjusted again. After the specific position is determined, it is lowered again to make the combined flanges of the first inner cone 410 and the second inner cone 420 align with the holes, and the combined surfaces are connected by bolts. At this time, the inner cone body of the tubular seat forms a whole.

[0064] After the inner vertebral bodies are connected, the height and center of the first inner vertebral body and the second inner vertebral body 420 are adjusted by a jack and a tensioner, wherein the first connector 411 and the second connector 421 are collinear.

[0065] Then, the second column is hoisted by the first lifting device 200 to be connected with the second connecting body 421 . The second column and the second connecting body 421 are fixed by a connecting plate, and the second column is colinear with the first column 310 .

[0066] The side flange diameter of the outer cone of the unit tubular seat is about 11m, and it is transported in sections. The outer cone body is divided into 4 outer cone sections and transported to the site. Each piece weighs about 6t. The outer cone sections are hoisted in four petals by other methods.

[0067] Specifically, the outer cone segment includes a first segment 610, a second segment 620, a third segment 630 and a fourth segment 640, and the order of installation is from bottom to top (see Figures 8 to 11 ), first hoist the first section 610, then the second section 620, and finally the third section 630 and the fourth section 640.

[0068] During the hoisting process of the outer vertebral body segments, adjustment ropes are arranged on the outer vertebral body segments, and the adjustment ropes are used for adjusting the posture of the outer vertebral body segments.

[0069] The outer cone should not be lifted too high from the ground during the segmented hoisting process. Before hoisting, two adjustment ropes of appropriate length should be hung on the corresponding positions of the lower end of the outer side of the outer cone (each adjustment rope requires two people to pull, and the force should be applied slowly when pulling the adjustment rope). This is to adjust the direction and also to adjust the installation position. After each outer cone segment is hoisted to the top of the inner shell of the tubular seat of each unit, the commander will make minor adjustments by visual inspection. When it is determined that it is in the correct position, the hook will be lowered. The hook should be lowered slowly and not too quickly. When it is lowered to the installation position, the specific installation position will be adjusted again.

[0070] The construction method of the present application can successfully complete the hoisting of the tubular seat of the bulb cross-flow unit in a small space, thereby improving the feasibility and efficiency of the construction. The use of a small first lifting device 200 and a second lifting device reduces interference with the surrounding environment and other construction activities, thereby reducing construction costs. Accurate lifting and positioning operations are achieved through the first lifting device 200 and the second lifting device, thereby effectively improving the accuracy and efficiency of the hoisting operation, ensuring the installation accuracy of the tubular seat, improving the operating stability of the unit, and effectively controlling the safety risks during the construction process, thereby ensuring the safety of personnel and equipment.

[0071] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A method for hanging a bulb tubular holder in a narrow space, characterized in that: The steps include: Measuring and analyzing the water inlet flow channel to determine the layout position and activity range of the first lifting equipment in the water inlet flow channel; Fix the first column delivered to the position; After the first inner cone is delivered to the position, the first lifting device and the second lifting device cooperate to adjust the first connector of the first inner cone to be horizontal and facing downward, and the first lifting device lifts the adjusted first connector to dock with the first column; After the second inner cone is delivered to the position, the first lifting device and the second lifting device cooperate to adjust the second connector of the second inner cone to be horizontal and upward, and the first lifting device lifts the adjusted first inner cone to dock with the first inner cone to form an inner cone body; The second upright column delivered to the position is hoisted until it is docked with the second connector; The outer vertebral body segments are transported in sequence, and the outer vertebral body segments are hoisted to the outside of the inner vertebral body from bottom to top in sequence to form the outer vertebral body.

2. The method for hanging a bulb tubular holder in a narrow space according to claim 1, characterized in that: The first inner vertebral body and the second inner vertebral body are both transported by a flatbed truck. During transportation, the first inner vertebral body and the second inner vertebral body are both placed upside down on the flatbed truck.

3. The method for hanging a bulb tubular holder in a narrow space according to claim 2, characterized in that: The first lifting device is a folding boom, and the second lifting device is a truck crane.

4. The method for hanging a bulb tubular holder in a narrow space according to any one of claims 1 to 3, characterized in that: A first connection part is provided at one end of the first inner vertebral body, and a second connection part is provided at the first connection body at the other end of the first inner vertebral body. When the posture of the first inner vertebral body is adjusted, the first main hook of the first lifting equipment is connected to the first connection part through a steel wire rope, and the second main hook of the second lifting equipment is connected to the second connection part through a steel wire rope.

5. The method for hanging a bulb tubular holder in a narrow space according to claim 4, characterized in that: A traction rope is provided at the other end of the first inner cone, and a hand winch is provided on the traction rope. The hand winch is connected to the first lifting equipment. When the first inner cone is hoisted to the first column, the vertical state of the first connector is adjusted by the hand winch and the traction rope.

6. The method for hanging a bulb tubular holder in a narrow space according to any one of claims 1 to 3, characterized in that: A third connection part is provided at one end of the second inner vertebral body, and a fourth connection part is provided at the second connection body at the other end of the second inner vertebral body. When the posture of the second inner vertebral body is adjusted, the first main hook of the first lifting equipment is connected to the fourth connection part through a steel wire rope, and the second main hook of the second lifting equipment is connected to the third connection part through a steel wire rope.

7. The method for hanging a bulb tubular holder in a narrow space according to claim 6, characterized in that: A traction rope is provided at the other end of the second inner cone, and a hand winch is provided on the traction rope. The hand winch is connected to the first lifting equipment. When the second inner cone is hoisted to be closed with the first inner cone, the vertical state of the second connector is adjusted by the hand winch and the traction rope.

8. The method for hanging a bulb tubular holder in a narrow space according to claim 1, characterized in that: After the inner vertebral bodies are docked, the height and center of the first inner vertebral body and the second inner vertebral body are adjusted by a jack and a tensioner, wherein the first connector and the second connector are collinear.

9. The method for hanging a bulb tubular holder in a narrow space according to claim 1, characterized in that: The second column is lifted by the first lifting equipment to dock with the second connector, the second column and the second connector are fixed by a connecting plate, and the second column is colinear with the first column.

10. The method for hanging a bulb tubular holder in a narrow space according to claim 1, characterized in that: During the hoisting process of the outer vertebral body segments, adjustment ropes are arranged on the outer vertebral body segments, and the adjustment ropes are used for adjusting the posture of the outer vertebral body segments.

Images