Tuning and damping assembly and multi-stage mixed tuning and damping device

Abstract

The utility model discloses a tuning shock absorption assembly and a multistage mixed tuning shock absorption device, the tuning shock absorption assembly comprises a main body support and a rectangular box body filled with damping liquid, the main body support comprises four guide rails, and each guide rail is vertically provided with a pulley block in a rolling manner; arc-shaped steel blocks are fixedly mounted on the lower surface of the rectangular box body; pulley brackets are respectively mounted on the rectangular box body corresponding to the pulley blocks; a serpentine spring is arranged below the arc-shaped steel block, and the left end part and the right end part of the serpentine spring are respectively connected with the left side fixing block and the right side fixing block on the corresponding sides; the tuning damping assembly is novel in design, simple in structure and convenient and fast to assemble. The multi-stage mixed tuning damping device comprises the tuning damping assembly, an air vortex damper and a mild steel damper, and the arc-shaped steel block, the air vortex damper and the mild steel damper are sequentially connected from top to bottom. The multi-stage mixed tuning damping device has the advantages of being novel in design, simple in structure, convenient and fast to assemble and capable of achieving multi-stage mixed tuning damping.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbing devices, in particular to a tuning shock absorbing component and a multi-stage hybrid tuning shock absorbing device. Background Art

[0002] Against the backdrop of rapid industrial development, vibration has become a common occurrence in everyday life, particularly in high-speed, heavy-loaded machinery and vehicles. With growing concern about the potential risks of vibration, tuned dampers, a key structural dynamic control component, have been widely used in buildings, bridges, high-rise buildings, and wind turbines.

[0003] The patent application number is: 202310801223.7, and the patent name is: A Chinese invention patent application for a tuned liquid column damping and vibration reduction system for floating wind power, which discloses the following technical solutions, specifically: a tuned liquid column damping and vibration reduction system for floating wind power, wherein an inner cavity is provided on the upper inner side of the wind turbine tower, an annular bottom plate is provided on the lower inner side of the wind turbine tower, four sets of guide rails are evenly installed along the circumference of the inner cavity of the wind turbine tower, a pulley block is installed on the guide rail, a tuned liquid column ball damper riser is installed on the outer side of the pulley block, and a tuned liquid column ball damper riser is installed between the bottoms of the risers. A tuned liquid column ball damper horizontal tube is installed, and the structure of the tuned liquid column ball damper horizontal tube is cross-shaped. A spring base is arranged on the annular bottom plate below the bottom of the tuned liquid column ball damper vertical tube, and a spring is installed on the spring base and connected to the bottom of the tuned liquid column ball damper vertical tube; the entire tuned liquid column ball damper vertical tube and the tuned liquid column ball damper horizontal tube act as a whole mechanism to act as a tuned mass damper, and the working fluid in the tuned liquid column ball damper vertical tube and the tuned liquid column ball damper horizontal tube oscillates back and forth in the pipeline with the vibration of the wind turbine tower to absorb and dissipate the structural vibration energy.

[0004] It should be noted that the above-mentioned tuned liquid column damping vibration reduction system for floating wind power has the following defects, specifically:

[0005] Defect 1. The lower ends of the four tuned liquid column ball damper risers are connected to the annular base plate through springs, that is, each spring is independently installed at the lower end of the corresponding tuned liquid column ball damper riser, which makes assembly inconvenient;

[0006] Defect 2: The vertical tube and horizontal tube of the tuned liquid column ball damper together form a tuned mass damper, and the horizontal tube of the tuned liquid column ball damper has a cross-shaped structure. The lower end of each vertical tube of the tuned liquid column ball damper is connected to the end of the corresponding position of the horizontal tube of the tuned liquid column ball damper, and the structure of the tuned mass damper is complex.

[0007] Defect 3: It is not possible to achieve multi-stage hybrid tuned shock absorption. Utility Model Content

[0008] The purpose of the utility model is to provide a tuning and damping component to address the deficiencies of the prior art. The tuning and damping component has a novel design, a simple structure, and is convenient and quick to assemble.

[0009] Another object of the present invention is to provide a multi-stage hybrid tuning and shock absorption device to address the deficiencies in the prior art. The multi-stage hybrid tuning and shock absorption device has a novel design, a simple structure, is easy and quick to assemble, and can achieve multi-stage hybrid tuning and shock absorption.

[0010] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions.

[0011] A tuning and damping assembly includes a main frame, the main frame includes four guide rails distributed in a rectangular shape and extending vertically, and each guide rail is respectively equipped with a pulley assembly for vertical rolling;

[0012] The tuning and damping assembly also includes a rectangular box containing damping fluid, a curved steel block is fixedly mounted on the lower surface of the rectangular box, and the lower surface of the curved steel block is a curved surface; the rectangular box is equipped with pulley brackets corresponding to each pulley group, and each pulley group is mounted on a corresponding pulley bracket;

[0013] A left fixed block is installed between the two guide rails on the left, and a right fixed block is installed between the two guide rails on the right, and the left fixed block and the right fixed block are arranged opposite each other with an interval; a serpentine spring is installed under the arc-shaped steel block, and the left end and the right end of the serpentine spring are respectively connected to the left fixed block and the right fixed block on the corresponding side, and the arc surface of the arc-shaped steel block is in contact with the serpentine spring.

[0014] Among them, the main body bracket also includes a bottom plate, a top plate located above the bottom plate and arranged opposite to the bottom plate at intervals, the four guide rails are located between the bottom plate and the top plate, the lower end of each guide rail is respectively connected to the bottom plate, and the upper end of each guide rail is respectively connected to the top plate.

[0015] The arc-shaped steel block is formed by stacking and splicing a number of steel mass blocks.

[0016] A multi-stage hybrid tuning and damping device includes a main frame and a tuning and damping assembly. The main frame includes four rectangularly distributed and vertically extending guide rails, each of which is vertically rollingly mounted with a pulley assembly.

[0017] The tuning and damping assembly includes a rectangular box containing damping fluid, a curved steel block is fixedly mounted on the lower surface of the rectangular box, and the lower surface of the curved steel block is a curved surface; the rectangular box is equipped with pulley brackets corresponding to each pulley group, and each pulley group is installed on a corresponding pulley bracket;

[0018] A left fixing block is installed between the two guide rails on the left side, and a right fixing block is installed between the two guide rails on the right side. The left fixing block and the right fixing block are arranged opposite each other with a gap. A serpentine spring is installed below the arc-shaped steel block. The left end and the right end of the serpentine spring are respectively connected to the left fixing block and the right fixing block on the corresponding side, and the arc surface of the arc-shaped steel block is in contact with the serpentine spring.

[0019] The multi-stage hybrid tuned shock absorption device also includes an air vortex damper and a mild steel damper. The air vortex damper is located above the mild steel damper, and the lower end of the air vortex damper is connected to the upper end of the mild steel damper; the piston rod of the air vortex damper extends upward and is connected to the arc-shaped steel block.

[0020] The main frame further comprises a bottom plate, a top plate located above the bottom plate and spaced apart from the bottom plate, the four guide rails are located between the bottom plate and the top plate, the lower end of each guide rail is connected to the bottom plate, and the upper end of each guide rail is connected to the top plate;

[0021] The mild steel damper is installed on the upper surface of the base plate.

[0022] The mild steel damper has a honeycomb structure and includes a number of mild steel columns with regular hexagonal cross sections and arranged vertically. The lower end of each mild steel column is screwed and fastened to the upper surface of the base plate by a locking screw.

[0023] The soft steel columns in the soft steel damper include three types of columns, which are first type columns, second type columns, and third type columns, respectively. The three types of columns are evenly distributed.

[0024] The first type of columns are made of AISI4140 alloy steel, the second type of columns are made of AISI 1018 low carbon steel, and the third type of columns are made of ASTM A572 carbon structural steel.

[0025] The arc-shaped steel block is formed by stacking and splicing a number of steel mass blocks.

[0026] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0027] 1、The tuning shock-absorbing assembly elastically supports the arc-shaped steel block and the rectangular box body through the serpentine spring, and the serpentine spring can be quickly installed through the left fixing block and the right fixing block; compared with the structure of the existing technology that the tuning mass damper is supported by a plurality of independently arranged springs, the structure of the tuning shock-absorbing assembly is simpler and has good assembly convenience. In addition, the tuning mass damper of the utility model is only a rectangular box body structure filled with damping liquid; compared with the tuning mass damper composed of the tuning liquid column ball damper stand pipe and the tuning liquid column ball damper horizontal pipe, the structure of the tuning shock-absorbing assembly is simpler. Therefore, the tuning shock-absorbing assembly has the advantages of novel design, simple structure and convenient and fast assembly.

[0028] 2、For the multi-stage hybrid tuning shock-absorbing device, in the use process, in the case of small amplitude vibration, the fourth embodiment can realize shock absorption and energy dissipation through the tuning shock-absorbing assembly; in the case of medium amplitude vibration, the inertial movement of the rectangular box body and the arc-shaped steel block will drive the piston rod of the air vortex damper to act, so that the air vortex damper works, at this time, the tuning shock-absorbing assembly and the air vortex damper act in coordination and dissipate energy; in the case of large amplitude vibration, the air vortex damper will transmit vibration to the soft steel damper, at this time, the tuning shock-absorbing assembly, the air vortex damper and the soft steel damper act in coordination and dissipate energy. Therefore, the multi-stage hybrid tuning shock-absorbing device of the fourth embodiment can effectively realize multi-stage hybrid tuning shock absorption. Therefore, the multi-stage hybrid tuning shock-absorbing device has the advantages of novel design, simple structure, convenient and fast assembly and can realize multi-stage hybrid tuning shock absorption. BRIEF DESCRIPTION OF DRAWINGS

[0029] The utility model will be further described below by using the drawings, but the embodiments in the drawings do not constitute any limitation to the utility model.

[0030] Figure 1 It is the structural schematic diagram of the utility model.

[0031] Figure 2 It is the structural schematic diagram of another view of the utility model.

[0032] Figure 3 It is the structural schematic diagram of the soft steel damper of the utility model.

[0033] In Figures 1 to 3 It includes:

[0034] 1-Main support; 11-Guide rail; 12-Bottom plate; 13-Top plate; 2-Pulley block; 3-Rectangular box; 4-Arc-shaped steel block; 5-Pulley frame; 61-Left fixing block; 62-Right fixing block; 7-Serpentine spring; 8-Air vortex damper; 81-Piston rod; 9-Mild steel damper; 91-Mild steel column. DETAILED DESCRIPTION

[0035] The present invention will be described below in conjunction with specific implementation methods.

[0036] Example 1, as Figure 1 and Figure 2 As shown, a tuning and damping assembly includes a main frame 1. The main frame 1 includes four guide rails 11 distributed in a rectangular shape and extending vertically. Each guide rail 11 is respectively equipped with a pulley set 2 for vertical rolling.

[0037] Among them, such as Figure 1 and Figure 2 As shown, the tuning and damping assembly also includes a rectangular box 3 containing damping fluid, and an arc-shaped steel block 4 is fastened to the lower surface of the rectangular box 3, and the lower surface of the arc-shaped steel block 4 is an arc-shaped surface; the rectangular box 3 is respectively equipped with a pulley bracket corresponding to each pulley group 2, and each pulley group 2 is respectively installed on the corresponding pulley bracket.

[0038] Further, such as Figure 1 and Figure 2 As shown, a left-side fixed block 61 is installed between the two guide rails 11 on the left, and a right-side fixed block 62 is installed between the two guide rails 11 on the right. The left-side fixed block 61 and the right-side fixed block 62 are arranged opposite each other with a gap. A serpentine spring 7 is installed below the arc-shaped steel block 4, and the left and right ends of the serpentine spring 7 are respectively connected to the left-side fixed block 61 and the right-side fixed block 62 on the corresponding sides, and the arc-shaped surface of the arc-shaped steel block 4 is in contact with the serpentine spring 7.

[0039] For the tuned shock-absorbing component of the first embodiment of the present invention, under the action of earthquake or impact load, the assembly consisting of the rectangular box 3 and the arc-shaped steel block 4 will produce inertial movement. The inertial movement of the assembly will act on the serpentine spring 7, thereby causing the serpentine spring 7 to undergo elastic deformation, thereby achieving shock absorption and offsetting the external force, so as to achieve the purpose of reducing vibration.

[0040] Furthermore, for the rectangular box 3 of the first embodiment, when the rectangular box 3 undergoes inertial movement under the action of an earthquake or impact load, the damping fluid inside the rectangular box 3 oscillates back and forth inside the rectangular box 3 to absorb and dissipate structural vibration energy. The damping fluid used in the first embodiment is silicone oil.

[0041] It should be emphasized that the tuned mass damper of the present embodiment 1 is merely a rectangular box 3 structure containing damping fluid inside; compared with the tuned mass damper in the prior art which is composed of a tuned liquid column ball damper vertical pipe and a tuned liquid column ball damper horizontal pipe, the structure of the present embodiment 1 is simpler.

[0042] In addition, the first embodiment of the present invention uses a serpentine spring 7 to elastically support the arc-shaped steel block 4 and the rectangular box 3, and the serpentine spring 7 can be quickly installed through the left fixing block 61 and the right fixing block 62; compared with the prior art in which a tuned mass damper structure is supported by multiple independently arranged springs, the first embodiment of the present invention has a simpler structure and is easier to assemble.

[0043] In summary, it can be seen that, through the above structural design, the tuning and damping assembly of the first embodiment has the advantages of novel design, simple structure, and convenient and quick assembly.

[0044] Example 2, as Figure 1 and Figure 2 As shown, the difference between this embodiment 2 and embodiment 1 is that the main frame 1 also includes a bottom plate 12, a top plate 13 located above the bottom plate 12 and spaced apart from the bottom plate 12, and four guide rails 11 are located between the bottom plate 12 and the top plate 13, and the lower end of each guide rail 11 is respectively connected to the bottom plate 12, and the upper end of each guide rail 11 is respectively connected to the top plate 13.

[0045] Embodiment 3: The difference between this embodiment 3 and embodiment 1 is that the arc-shaped steel block 4 is formed by stacking and splicing a number of steel mass blocks.

[0046] The steel mass blocks of the arc-shaped steel block 4 adopt a split structural design, and all the steel mass blocks are stacked and assembled into the arc-shaped steel block 4; for the arc-shaped steel block 4 with this structural design, the number of steel mass blocks can be adaptively adjusted according to needs, and the weight of the arc-shaped steel block 4 can be changed and adjusted according to actual usage requirements.

[0047] Example 4, as Figure 1 and Figure 2 As shown, a multi-stage hybrid tuning and damping device includes a main frame 1 and a tuning and damping assembly. The main frame 1 includes four guide rails 11 distributed in a rectangular shape and extending vertically respectively. Each guide rail 11 is respectively vertically rollingly installed with a pulley group 2.

[0048] Among them, such as Figure 1 and Figure 2 As shown, the tuning and damping assembly includes a rectangular box 3 containing damping fluid, and an arc-shaped steel block 4 is fastened to the lower surface of the rectangular box 3, and the lower surface of the arc-shaped steel block 4 is an arc-shaped surface; the rectangular box 3 is respectively equipped with a pulley bracket corresponding to each pulley group 2, and each pulley group 2 is respectively installed on the corresponding pulley bracket.

[0049] Further, such as Figure 1 and Figure 2 As shown, a left-side fixed block 61 is installed between the two guide rails 11 on the left, and a right-side fixed block 62 is installed between the two guide rails 11 on the right. The left-side fixed block 61 and the right-side fixed block 62 are arranged opposite each other with a gap. A serpentine spring 7 is installed below the arc-shaped steel block 4, and the left and right ends of the serpentine spring 7 are respectively connected to the left-side fixed block 61 and the right-side fixed block 62 on the corresponding sides, and the arc-shaped surface of the arc-shaped steel block 4 is in contact with the serpentine spring 7.

[0050] Furthermore, if Figure 1 and Figure 2 As shown, the multi-stage hybrid tuned shock absorption device also includes an air vortex damper 8 and a mild steel damper 9. The air vortex damper 8 is located above the mild steel damper 9, and the lower end of the air vortex damper 8 is connected to the upper end of the mild steel damper 9; the piston rod 81 of the air vortex damper 8 extends upward and is connected to the arc-shaped steel block 4.

[0051] Since the tuning and damping assembly has the advantages of novel design, simple structure, and convenient and quick assembly, the multi-stage hybrid tuning and damping device of the fourth embodiment also has the advantages of novel design, simple structure, and convenient and quick assembly.

[0052] In addition, for the multi-stage hybrid tuned shock-absorbing device of the fourth embodiment, during its use, in the case of small-amplitude vibration, the fourth embodiment can achieve shock absorption and energy consumption through the tuned shock-absorbing component; in the case of medium-amplitude vibration, the inertial movement of the rectangular box 3 and the arc-shaped steel block 4 will drive the piston rod 81 of the air vortex damper 8 to move, thereby causing the air vortex damper 8 to work. At this time, the tuned shock-absorbing component and the air vortex damper 8 work together to absorb shock and consume energy; in the case of large-amplitude vibration, the air vortex damper 8 will transmit the vibration to the mild steel damper 9. At this time, the tuned shock-absorbing component, the air vortex damper 8, and the mild steel damper 9 work together to absorb shock and consume energy. Therefore, the multi-stage hybrid tuned shock-absorbing device of the fourth embodiment can effectively achieve multi-stage hybrid tuned shock absorption.

[0053] In summary, it can be seen that, through the above structural design, the multi-stage hybrid tuning vibration reduction device of the fourth embodiment has the advantages of novel design, simple structure, convenient and quick assembly, and can achieve multi-stage hybrid tuning vibration reduction.

[0054] Example 5, as Figure 1 and Figure 2As shown, the difference between this embodiment five and embodiment four is that: the main body bracket 1 also includes a bottom plate 12, a top plate 13 located above the bottom plate 12 and arranged opposite to the bottom plate 12 at intervals, four guide rails 11 are located between the bottom plate 12 and the top plate 13, the lower end of each guide rail 11 is respectively connected to the bottom plate 12, and the upper end of each guide rail 11 is respectively connected to the top plate 13; the mild steel damper 9 is installed on the upper surface of the bottom plate 12.

[0055] Example 6: Figure 3 As shown, the difference between the sixth embodiment and the fifth embodiment is that the mild steel damper 9 has a honeycomb structure, and the mild steel damper 9 includes a plurality of mild steel columns 91 with regular hexagonal cross-sections and arranged vertically, and the lower end of each mild steel column 91 is screwed and fastened to the upper surface of the base plate 12 by a locking screw.

[0056] The mild steel damper 9 designed with a honeycomb structure has the advantage of good structural stability.

[0057] In addition, each mild steel column 91 is detachably mounted on the base plate 12 by screw connection. This assembly structure design can achieve the purpose of facilitating the replacement of the mild steel columns 91.

[0058] Embodiment 7: The difference between this embodiment 7 and embodiment 6 is that the soft steel columns 91 in the soft steel damper 9 include three types of columns, which are first type columns, second type columns, and third type columns, respectively, and the three types of columns are evenly distributed.

[0059] The first type of columns are made of AISI4140 alloy steel, the second type of columns are made of AISI 1018 low carbon steel, and the third type of columns are made of ASTM A572 carbon structural steel.

[0060] It should be pointed out that by evenly distributing soft steel columns with different yield strengths in the soft steel damper 9 to achieve a passive variable damping effect, in the case of large vibrations, the soft steel damper 9 absorbs and dissipates vibration energy through its large plastic deformation capacity to achieve energy dissipation in the large vibration stage.

[0061] Embodiment 8: The difference between this embodiment 8 and embodiment 4 is that the arc-shaped steel block 4 is formed by stacking and splicing a number of steel mass blocks.

[0062] The steel mass blocks of the arc-shaped steel block 4 adopt a split structural design, and all the steel mass blocks are stacked and assembled into the arc-shaped steel block 4; for the arc-shaped steel block 4 with this structural design, the number of steel mass blocks can be adaptively adjusted according to needs, and the weight of the arc-shaped steel block 4 can be changed and adjusted according to actual usage requirements.

[0063] The above merely describes preferred embodiments of the present application, and for those skilled in the art, according to the idea of the present application, changes can be made in the specific implementation manner and application range, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A tuning and damping assembly, comprising a main frame (1), the main frame (1) comprising four guide rails (11) distributed in a rectangular shape and extending vertically, each guide rail (11) being respectively provided with a pulley assembly (2) for vertical rolling installation; Its characteristics are: The tuning and damping assembly further comprises a rectangular box (3) containing damping fluid therein, an arc-shaped steel block (4) being fixedly mounted on the lower surface of the rectangular box (3), and the lower surface of the arc-shaped steel block (4) being an arc-shaped surface; the rectangular box (3) is respectively provided with a pulley bracket corresponding to each pulley group (2), and each pulley group (2) is respectively provided on a corresponding pulley bracket; A left fixed block (61) is installed between the two guide rails (11) on the left side, and a right fixed block (62) is installed between the two guide rails (11) on the right side, and the left fixed block (61) and the right fixed block (62) are arranged opposite each other at intervals; a serpentine spring (7) is installed below the arc-shaped steel block (4), and the left end and the right end of the serpentine spring (7) are respectively connected to the left fixed block (61) and the right fixed block (62) on the corresponding side, and the arc surface of the arc-shaped steel block (4) is in contact with the serpentine spring (7).

2. The tuning and damping assembly according to claim 1, characterized in that: The main frame (1) further comprises a bottom plate (12), a top plate (13) located above the bottom plate (12) and spaced apart from the bottom plate (12), the four guide rails (11) being located between the bottom plate (12) and the top plate (13), the lower end of each guide rail (11) being connected to the bottom plate (12), and the upper end of each guide rail (11) being connected to the top plate (13).

3. The tuning and damping assembly according to claim 1, characterized in that: The arc-shaped steel block (4) is formed by stacking and splicing a number of steel mass blocks.

4. A multi-stage hybrid tuning and damping device, comprising a main frame (1) and a tuning and damping assembly, wherein the main frame (1) comprises four guide rails (11) distributed in a rectangular shape and extending vertically, and each guide rail (11) is respectively provided with a pulley assembly (2) for vertical rolling installation; Its characteristics are: The tuning and damping assembly includes a rectangular box (3) containing damping fluid, an arc-shaped steel block (4) being fixedly mounted on the lower surface of the rectangular box (3), and the lower surface of the arc-shaped steel block (4) is an arc-shaped surface; the rectangular box (3) is respectively equipped with a pulley bracket corresponding to each pulley group (2), and each pulley group (2) is respectively installed on a corresponding pulley bracket; A left fixed block (61) is installed between the two left guide rails (11), and a right fixed block (62) is installed between the two right guide rails (11), and the left fixed block (61) and the right fixed block (62) are arranged opposite each other with a gap; a serpentine spring (7) is installed below the arc-shaped steel block (4), and the left end and the right end of the serpentine spring (7) are respectively connected to the left fixed block (61) and the right fixed block (62) on the corresponding side, and the arc surface of the arc-shaped steel block (4) is in contact with the serpentine spring (7); The multi-stage hybrid tuned damping device further comprises an air vortex damper (8) and a mild steel damper (9), wherein the air vortex damper (8) is located above the mild steel damper (9), and the lower end of the air vortex damper (8) is connected to the upper end of the mild steel damper (9); the piston rod (81) of the air vortex damper (8) extends upward and is connected to the arc-shaped steel block (4).

5. The multi-stage hybrid tuning damping device according to claim 4, characterized in that: The main frame (1) further comprises a bottom plate (12), a top plate (13) located above the bottom plate (12) and spaced apart from the bottom plate (12), the four guide rails (11) being located between the bottom plate (12) and the top plate (13), the lower end of each guide rail (11) being connected to the bottom plate (12), and the upper end of each guide rail (11) being connected to the top plate (13); The mild steel damper (9) is mounted on the upper surface of the base plate (12).

6. The multi-stage hybrid tuning damping device according to claim 5, characterized in that: The mild steel damper (9) has a honeycomb structure and includes a plurality of mild steel columns (91) with regular hexagonal cross sections and arranged vertically. The lower end of each mild steel column (91) is screwed to the upper surface of the base plate (12) by a locking screw.

7. The multi-stage hybrid tuning damping device according to claim 6, characterized in that: The soft steel columns (91) in the soft steel damper (9) include three types of columns, which are first-type columns, second-type columns, and third-type columns, respectively, and the three types of columns are evenly distributed; The first type of columns are made of AISI4140 alloy steel, the second type of columns are made of AISI 1018 low carbon steel, and the third type of columns are made of ASTM A572 carbon structural steel.

8. The multi-stage hybrid tuning damping device according to claim 4, characterized in that: The arc-shaped steel block (4) is formed by stacking and splicing a number of steel mass blocks.

Images