Steel structure support

Abstract

The invention relates to the technical field of supports, and discloses a steel structure support which comprises a threaded adjusting mechanism, an air pressure type limiting mechanism and a fixed limiting mechanism. The arc-shaped limiting plate is located on the periphery of the inner rack structure in a fixed state, and the outer rack structure is arranged on the inner concave face of the arc-shaped limiting plate and can be meshed with the inner rack structure. According to the steel structure support, the height-adjustable supporting function of the supporting steel plate is achieved through mobility of the thread structure, in the working process, the device can generate a rotation damping effect on the thread structure, and therefore the loosening phenomenon between the internal thread structure and the external thread structure caused by mechanical vibration is effectively prevented; according to the device, damping between the thread structures is elastic damping, so that the limiting range of the thread structures is widened, and the stability of equipment in the working process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of brackets, and in particular to a steel structure bracket. Background Art

[0002] Steel structure is a commonly used structure in construction. It takes advantage of its high strength and convenient construction to make the support of equipment or components on the construction site more secure. In the construction process, steel structure supports are also required. Workers can stand on the steel structure supports to perform construction operations at higher positions, which increases convenience.

[0003] For example, a Chinese patent with publication number "CN220580452U" discloses "a steel structure bracket", whose main structure includes a support column, a support ring, a limit groove, a screw rod, a limit block, an adjustment mechanism, a protective shell, a driving mechanism and a support plate. The steel structure bracket has the advantages of adjustable height, etc. The driving mechanism is used to drive the adjustment mechanism to operate, and then the adjustment mechanism drives the screw rod to move in the direction of the screw rod itself, and drives the support plate to move, thereby adjusting the position of the support plate, so that the height of the steel structure bracket can be adjusted, which solves the problem that the current steel structure bracket is fixed and cannot be adjusted.

[0004] However, when the above steel structure bracket is actually working, since the equipment is in working state, under the influence of mechanical vibration, it will cause loosening between the threaded structures, resulting in poor support stability for the support plate. Therefore, its working stability is relatively poor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a steel structure bracket, which utilizes the mobility of the threaded structure to achieve a height-adjustable support function for the supporting steel plate. During operation, the device can produce a rotational damping effect on the threaded structure, thereby effectively preventing loosening between the internal threaded structure and the external threaded structure caused by mechanical vibration. In addition, the damping of the threaded structures by the device is elastic damping, thereby increasing the restriction range of the threaded structure, thereby improving the stability of the equipment during operation, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel structure bracket, comprising a bottom support base, an inner recessed mounting groove arranged at the center of the upper end surface of the bottom support base, a rod body fixing groove arranged at the center of the inner recessed mounting groove, a support steel plate located directly above the bottom support base, a hollow support rod located below the four corners of the support steel plate, a longitudinal component movable cavity arranged inside the hollow support rod, an inner movable plate placed inside the longitudinal component movable cavity, a longitudinal telescopic rod fixedly mounted on the upper end surface of the inner movable plate and with the top end fixedly mounted on the bottom surface of the support steel plate, and a longitudinal telescopic rod placed at the bottom of the inner movable plate. The invention also includes a pneumatic limiting mechanism, in which a special-shaped sleeve head is arranged on the periphery of the external threaded sleeve, an inner limiting protrusion is arranged on the inner circumferential surface of the special-shaped sleeve head, a sheet-like rubber bag is embedded in one side of the inner limiting protrusion and expands after being subjected to gas pressure, and contacts one side of the outer limiting protrusion, and an inner rack structure is arranged on the outer circumferential surface of the special-shaped sleeve head; and a fixed limiting mechanism, in which an arc-shaped limiting plate is arranged on the periphery of the inner rack structure in a fixed state, and an outer rack structure is arranged on the inner concave surface of the arc-shaped limiting plate and can mesh with the inner rack structure.

[0007] Preferably, the threaded adjustment mechanism includes an externally threaded sleeve, the bottom periphery of the externally threaded sleeve is installed in the concave mounting groove through a bearing, the center of the externally threaded sleeve is provided with an internally threaded hole with openings at both ends, and a threaded support rod is installed in the internally threaded hole through a threaded structure, the top of the threaded support rod is provided with a mounting head which is an integral structure with it and fixedly mounted on the bottom of the No. 1 fixing plate, the interior of the threaded support rod is provided with a polygonal limiting hole which is open at the bottom end, a polygonal limiting rod is inserted into the interior of the polygonal limiting hole, and the bottom end of the polygonal limiting rod is fixedly mounted on the interior of the rod body fixing groove, and the outer circumferential surface of the externally threaded sleeve is provided with a plurality of external limiting protrusions which are an integral structure with it.

[0008] Preferably, the thread structure includes an internal thread structure arranged at the inner wall of the circumference of the external thread sleeve and an external thread structure arranged on the outer circumference of the threaded support rod, and the internal thread structure matches the external thread structure.

[0009] Preferably, the structural shape of the polygonal limiting hole longitudinal cross-section is consistent with the structural shape of the polygonal limiting rod longitudinal cross-section, both are polygonal structures, and the structural dimensions of the polygonal limiting hole longitudinal cross-section match the structural dimensions of the polygonal limiting rod longitudinal cross-section.

[0010] Preferably, the pneumatic limiting mechanism includes a special-shaped sleeve, the center of the special-shaped sleeve is provided with an inner sleeve hole structure that can be sleeved on the periphery of the outer limiting protrusion, the inner circumferential surface of the special-shaped sleeve is provided with a plurality of inner limiting protrusions that are integrally formed with the special-shaped sleeve, each of the inner limiting protrusions is provided with a closed gas reserved cavity inside, the plurality of gas reserved cavities are connected through an annular cavity, one side of each of the inner limiting protrusions is provided with a strip-shaped embedding port connecting the gas reserved cavity and the inner sleeve hole structure, a sheet-shaped rubber bag is closed and embedded in the interior of each of the strip-shaped embedding ports, the outer circumferential surface of the special-shaped sleeve is provided with a plurality of inner rack structures that are integrally formed with the special-shaped sleeve, the upper end surface of the special-shaped sleeve is provided with an inflation channel that is integrally formed with the special-shaped sleeve and connected to the annular cavity, and an air valve is installed inside the inflation channel.

[0011] Preferably, the number of the inner limiting protrusions is consistent with the number of the outer limiting protrusions.

[0012] Preferably, when the inner limit protrusion is inserted into the gap between the two outer limit protrusions, a mechanical gap is still retained between the adjacent inner limit protrusions and the outer limit protrusions.

[0013] Preferably, the sheet-like rubber bag is made of a rubber material with elastic restoring function.

[0014] Preferably, the fixed limiting mechanism includes an annular fixing plate fixedly mounted on the upper surface of the bottom supporting base, a sleeve release hole is provided at the center of the annular fixing plate, an arc-shaped limiting plate integrally formed with the upper end surface of the annular fixing plate is provided, and a plurality of external rack structures integrally formed with the arc-shaped limiting plate are provided on the inner concave surface of the arc-shaped limiting plate.

[0015] Preferably, the outer rack structure is capable of meshing with the inner rack structure.

[0016] Compared with the prior art, the present invention provides a steel structure bracket, which has the following beneficial effects: 1. The mobility of the threaded structure is used to realize the height-adjustable support function of the supporting steel plate. In the working process, the device can produce a rotation damping effect on the threaded structure, thereby effectively preventing the loosening phenomenon between the internal threaded structure and the external threaded structure caused by mechanical vibration. In addition, the damping between the threaded structures of the device is elastic damping, thereby increasing the restriction range of the threaded structure, thereby improving the stability of the equipment during the working process; 2. By setting a threaded adjustment mechanism, when the support height needs to be adjusted, the external threaded sleeve is rotated in a directional manner. Due to the effect of the threaded structure and the polygonal limit rod, the threaded support rod can drive the No. 1 fixed plate to move longitudinally. By controlling the rotation direction, the longitudinal movement direction of the No. 1 fixed plate can be controlled until the height of the support steel plate is adjusted to a suitable position; 3. By setting up a pneumatic limit mechanism and using an inflating device to inject gas into the inflating channel, the sheet rubber bag will expand outward under the influence of the air pressure until the sheet rubber bag contacts the corresponding side of the outer limit boss with a certain pressure and remains stable. At this time, the gas pressure will apply pressure to the outer limit boss through the sheet rubber bag, thereby generating a pre-tightening force on the outer threaded sleeve, thereby preventing it from loosening under vibration; 4. By setting a fixed limit mechanism, after the height adjustment is completed, the special-shaped sleeve is inserted into the concave area of ​​the arc-shaped limit plate, and the outer rack structure and the inner rack structure are in a meshing state, and the height is manually maintained. Finally, under the reaction of the gas and the meshing force of the outer rack structure and the inner rack structure, it can be in a fixed position, thereby playing a limiting function for the special-shaped sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the present invention; Figure 2 It is a three-dimensional cross-sectional view of the present invention in the central area; Figure 3 It is a three-dimensional cross-sectional view of the edge area of ​​the present invention; Figure 4 is a three-dimensional diagram of the threaded adjustment mechanism of the present invention; Figure 5 is a three-dimensional cross-sectional view of the threaded adjustment mechanism of the present invention; Figure 6 It is a three-dimensional diagram of the pneumatic limiting mechanism in the present invention; Figure 7 It is a three-dimensional cross-sectional view of the pneumatic limiting mechanism of the present invention; Figure 8 It is a three-dimensional diagram of the fixed limiting mechanism in the present invention.

[0018] Among them: 1. Bottom support base; 2. Inner concave installation groove; 3. Rod body fixing groove; 4. No. 1 fixing plate; 5. Threaded adjustment mechanism; 51. External threaded sleeve; 52. Internal threaded hole; 53. External limit raised platform; 54. Threaded support rod; 55. Threaded structure; 56. Mounting head; 57. Polygonal limit hole; 58. Polygonal limit rod; 6. Pneumatic limit mechanism; 61. Special-shaped sleeve head; 62. Internal sleeve hole structure; 63. Internal limit Raised platform; 64, gas reserved cavity; 65, annular cavity; 66, strip-shaped embedding port; 67, sheet rubber bag; 68, inner rack structure; 69, inflation channel; 7, fixed limit mechanism; 71, annular fixed plate; 72, outer sleeve release hole; 73, arc-shaped limit plate; 74, outer rack structure; 8, supporting steel plate; 9, hollow supporting rod; 10, longitudinal component movable cavity; 11, inner movable plate; 12, longitudinal telescopic rod; 13, spiral spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 , Figure 2 and Figure 3 A steel structure bracket comprises a bottom support base 1, an inner recessed mounting groove 2 arranged at the center of the upper end surface of the bottom support base 1, a rod body fixing groove 3 arranged at the center of the inner recessed mounting groove 2, a support steel plate 8 located directly above the bottom support base 1, a hollow support rod 9 located below the four corners of the support steel plate 8, a longitudinal component movable cavity 10 arranged inside the hollow support rod 9, an inner movable plate 11 placed inside the longitudinal component movable cavity 10, a longitudinal telescopic rod 12 fixedly mounted on the upper end surface of the inner movable plate 11 and with the top fixedly mounted on the bottom surface of the support steel plate 8, and a coil spring 13 placed at the bottom of the inner movable plate 11 and having an elastic supporting effect. After the support steel plate 8 rises to a suitable height, it can play an effective supporting function. At the same time, the coil spring 13 produces an upward elastic supporting effect on the inner movable plate 11, and the inner movable plate 11 produces an upward supporting effect on the support steel plate 8 through the longitudinal telescopic rod 12, thereby improving the supporting stability of the support steel plate 8 at the edge.

[0021] To adjust the support height, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5, it is necessary to set up a threaded adjustment mechanism 5, which is internally provided with a threaded support rod 54 that can generate longitudinal movement and drive the No. 1 fixed plate 4 to move, a polygonal limiting rod 58 located at the center of the threaded support rod 54 and capable of preventing the threaded support rod 54 from rotating, an externally threaded sleeve 51 installed on the periphery of the threaded support rod 54 through a threaded structure 55, and an externally limiting protrusion 53 located on the circumferential surface of the externally threaded sleeve 51. When it is necessary to adjust the support height, the externally threaded sleeve 51 is rotated in a directional manner. Due to the action of the threaded structure 55 and the polygonal limiting rod 58, the threaded support rod 54 can drive the No. 1 fixed plate 4 to move longitudinally. By controlling the rotation direction, the longitudinal movement direction of the No. 1 fixed plate 4 can be controlled until the height of the supporting steel plate 8 is adjusted to a suitable position.

[0022] For the specific structure of the threaded adjustment mechanism 5, please refer to Figure 4 and Figure 5 , including an externally threaded sleeve 51, the bottom periphery of the externally threaded sleeve 51 is installed in the concave installation groove 2 through a bearing, the center of the externally threaded sleeve 51 is provided with an internally threaded hole 52 with openings at both ends, and the externally threaded sleeve 51 is provided with a threaded support rod 54 through a threaded structure 55 in the internally threaded hole 52, wherein the threaded structure 55 includes an internally threaded structure provided at the inner wall of the circumference of the externally threaded sleeve 51 and an externally threaded structure provided on the outer circumferential surface of the threaded support rod 54, and the internally threaded structure matches the externally threaded structure, and the top end of the threaded support rod 54 is provided with a mounting head 56 which is an integral structure with it and fixedly installed at the bottom of the No. 1 fixing plate 4, The threaded support rod 54 is provided with a polygonal limiting hole 57 with an opening at the bottom end, and a polygonal limiting rod 58 is inserted into the polygonal limiting hole 57. In order to prevent the component from self-rotating, it is necessary to make the structural shape of the longitudinal section of the polygonal limiting hole 57 consistent with the structural shape of the longitudinal section of the polygonal limiting rod 58, both of which are polygonal structures, and the structural dimensions of the longitudinal section of the polygonal limiting hole 57 match the structural dimensions of the longitudinal section of the polygonal limiting rod 58, and the bottom end of the polygonal limiting rod 58 is fixedly installed in the rod body fixing groove 3, and the outer circumferential surface of the externally threaded sleeve 51 is provided with a plurality of external limiting protrusions 53 with an integral structure therewith.

[0023] In order to generate a preload on the external threaded sleeve 51 to prevent it from loosening under vibration, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7, it is necessary to set up a pneumatic limit mechanism 6, which is internally provided with a special-shaped sleeve head 61 located on the periphery of the external threaded sleeve 51, an inner limit protrusion 63 arranged on the inner circumferential surface of the special-shaped sleeve head 61, a sheet rubber bag 67 embedded in one side of the inner limit protrusion 63 and expanding after being subjected to gas pressure and abutting against one side of the outer limit protrusion 53, and an inner rack structure 68 arranged on the outer circumferential surface of the special-shaped sleeve head 61. After the adjustment of the abutting support of the No. 1 fixed plate 4 is completed, an inflation device is used to inject gas into the inflation channel 69. Under the influence of the air pressure, the sheet rubber bag 67 will expand outward until the sheet rubber bag 67 abuts against the corresponding side of the outer limit protrusion 53 with a certain pressure and remains stable. At this time, the gas pressure will apply pressure to the outer limit protrusion 53 through the sheet rubber bag 67, thereby generating a pre-tightening force on the external threaded sleeve 51, thereby preventing it from loosening under vibration.

[0024] For the specific structure of the pneumatic limiting mechanism 6, please refer to Figure 6 and Figure 7 , including a special-shaped sleeve 61, the center of which is provided with an inner sleeve hole structure 62 that can be sleeved on the periphery of the outer limiting protrusion 53, and the inner circumferential surface of the special-shaped sleeve 61 is provided with a plurality of inner limiting protrusions 63 of an integral structure therewith. In order to have correspondence, it is necessary to make the inner limiting protrusions 63 inserted into the gap between the two outer limiting protrusions 53 correspondingly, and there is still a mechanical gap between the adjacent inner limiting protrusions 63 and the outer limiting protrusions 53. The number of the inner limiting protrusions 63 is consistent with the number of the outer limiting protrusions 53, and each of the inner limiting protrusions 63 is provided with a closed gas reserved cavity 64 inside, and the plurality of the inner limiting protrusions 63 are provided with a gas reserved cavity 64 in a closed state. The gas reserved cavities 64 are connected through an annular cavity 65. One side of each of the inner limit protrusions 63 is provided with a strip-shaped embedding opening 66 connecting the gas reserved cavity 64 and the inner sleeve hole structure 62. A sheet rubber bag 67 is enclosedly embedded inside each of the strip-shaped embedding openings 66. In order to have the reset capability, the sheet rubber bag 67 needs to be made of a rubber material with an elastic reset function. The outer circumferential surface of the special-shaped sleeve 61 is provided with a plurality of inner rack structures 68 integrally formed therewith. The upper end surface of the special-shaped sleeve 61 is provided with an inflation channel 69 integrally formed therewith and connected to the annular cavity 65, and an air valve is installed inside the inflation channel 69.

[0025] In order to limit the special-shaped sleeve 61, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 8, it is necessary to set up a fixed limiting mechanism 7, which is internally provided with an arc-shaped limiting plate 73 located in a fixed state on the periphery of the inner rack structure 68, and an outer rack structure 74 arranged on the inner concave surface of the arc-shaped limiting plate 73 and capable of meshing with the inner rack structure 68. When the height adjustment is completed, the special-shaped sleeve 61 is inserted into the inner concave area of ​​the arc-shaped limiting plate 73, and the outer rack structure 74 and the inner rack structure 68 are in a meshing state, and the height is manually maintained. Finally, under the reaction of the gas and the meshing force of the outer rack structure 74 and the inner rack structure 68, it can be in a fixed position, thereby playing a limiting function for the special-shaped sleeve 61.

[0026] For the specific structure of the fixed limiting mechanism 7, please refer to Figure 8 , including an annular fixing plate 71 fixedly mounted on the upper surface of the bottom support base 1, a sleeve release hole 72 is provided at the center of the annular fixing plate 71, an arc-shaped limiting plate 73 integrally formed with the annular fixing plate 71 is provided on the upper end surface, a plurality of outer rack structures 74 integrally formed with the annular limiting plate 73 are provided on the inner concave surface, and the outer rack structure 74 can mesh with the inner rack structure 68.

[0027] The specific working principle of the present invention is that when the support height needs to be adjusted, the external threaded sleeve 51 is rotated in a directional manner. Due to the effect of the threaded structure 55 and the polygonal limiting rod 58, the threaded support rod 54 can drive the first fixing plate 4 to move longitudinally. By controlling the rotation direction, the longitudinal movement direction of the first fixing plate 4 can be controlled until the height of the supporting steel plate 8 is adjusted to a suitable position. Insert the special-shaped sleeve 61 into the concave area of ​​the arc-shaped limit plate 73, and make the outer rack structure 74 and the inner rack structure 68 in a meshing state, and manually maintain the height; An inflating device is used to inject gas into the inflating channel 69. Under the influence of the air pressure, the sheet rubber bag 67 will expand outward until the sheet rubber bag 67 contacts the corresponding side of the outer limit boss 53 with a certain pressure and remains stable. At this time, the gas pressure will apply pressure to the outer limit boss 53 through the sheet rubber bag 67, thereby generating a pre-tightening force on the outer threaded sleeve 51. After the support steel plate 8 rises to a suitable height, it can play an effective supporting function. At the same time, the coil spring 13 produces an upward elastic supporting effect on the inner movable plate 11, and the inner movable plate 11 produces an upward supporting effect on the support steel plate 8 through the longitudinal telescopic rod 12, thereby improving the supporting stability of the support steel plate 8 at the edge.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure support, comprising a bottom support base (1), a recessed mounting groove (2) arranged at the center of the upper end surface of the bottom support base (1), a rod body fixing groove (3) arranged at the center of the recessed mounting groove (2), a support steel plate (8) located directly above the bottom support base (1), a hollow support rod (9) located below four corners of the support steel plate (8), a longitudinal component movable cavity (10) arranged inside the hollow support rod (9), an inner movable plate (11) placed inside the longitudinal component movable cavity (10), a longitudinal telescopic rod (12) fixedly mounted on the upper end surface of the inner movable plate (11) and having its top end fixedly mounted on the bottom surface of the support steel plate (8), and a coil spring (13) placed at the bottom of the inner movable plate (11), characterized in that: Also includes, A threaded adjustment mechanism (5) is provided inside thereof with a threaded support rod (54) capable of driving a first fixing plate (4) to move, and an externally threaded sleeve (51) mounted on the outer periphery of the threaded support rod (54) via a threaded structure (55). The threaded adjustment mechanism (5) comprises an externally threaded sleeve (51), the outer periphery of the bottom of the externally threaded sleeve (51) being mounted in a concave mounting groove (2) via a bearing, an internally threaded hole (52) with openings at both ends being provided at the center of the externally threaded sleeve (51), and the externally threaded sleeve (51) being located in the internally threaded hole (52) via a threaded structure (55). 55) is installed with a threaded support rod (54), the top of the threaded support rod (54) is provided with a mounting head (56) which is an integral structure with the threaded support rod (54) and fixedly mounted on the bottom of the first fixing plate (4), the inside of the threaded support rod (54) is provided with a polygonal limiting hole (57) with a bottom opening, the inside of the polygonal limiting hole (57) is inserted with a polygonal limiting rod (58), and the bottom end of the polygonal limiting rod (58) is fixedly mounted inside the rod body fixing groove (3), and the outer circumferential surface of the externally threaded sleeve (51) is provided with a plurality of external limiting protrusions (53) which are an integral structure with the threaded support rod (54); and a pneumatic limiting mechanism (6), wherein a special-shaped sleeve (61) located on the periphery of an externally threaded sleeve (51) and a sheet-like rubber bag (67) located inside the special-shaped sleeve (61) are arranged inside the pneumatic limiting mechanism (6), wherein the special-shaped sleeve (61) is provided with an inner sleeve hole structure (62) at the center of the special-shaped sleeve (61) that can be sleeved on the periphery of an external limiting protrusion (53), wherein the inner circumferential surface of the special-shaped sleeve (61) is provided with a plurality of internal limiting protrusions (63) having an integral structure therewith, wherein each of the internal limiting protrusions (63) is provided with a closed gas reserved cavity (64), and the plurality of gas reserved cavities (64) are connected by an annular The inner limit protrusion (63) is connected to the cavity (65), and a strip-shaped embedding opening (66) connecting the gas reserved cavity (64) and the inner sleeve hole structure (62) is provided on one side of each of the inner limit protrusions (63). A sheet-shaped rubber bag (67) is embedded in a closed manner inside each of the strip-shaped embedding openings (66). The sheet-shaped rubber bag (67) is made of a rubber material with an elastic reset function. The outer circumferential surface of the special-shaped sleeve (61) is provided with a plurality of internal rack structures (68) integrally formed therewith. The upper end surface of the special-shaped sleeve (61) is provided with an inflation channel (69) integrally formed therewith and connected to the annular cavity (65), and an air valve is installed inside the inflation channel (69).

2. A steel structure support according to claim 1, characterized in that: The thread structure (55) comprises an internal thread structure arranged on the inner circumferential wall of the external thread sleeve (51) and an external thread structure arranged on the outer circumferential surface of the thread support rod (54), and the internal thread structure matches the external thread structure.

3. A steel structure support according to claim 1, characterized in that: The structural shape of the longitudinal cross section of the polygonal limiting hole (57) is consistent with the structural shape of the longitudinal cross section of the polygonal limiting rod (58), both of which are polygonal structures, and the structural dimensions of the longitudinal cross section of the polygonal limiting hole (57) match the structural dimensions of the longitudinal cross section of the polygonal limiting rod (58).

4. The steel structure support according to claim 1, characterized in that: The number of the inner limit protrusions (63) is consistent with the number of the outer limit protrusions (53).

5. The steel structure support according to claim 1, characterized in that: When the inner limit protrusion (63) is inserted into the gap between the two outer limit protrusions (53), a mechanical gap is still retained between the adjacent inner limit protrusions (63) and outer limit protrusions (53).

6. The steel structure support according to claim 1, characterized in that: It also includes a fixed limiting mechanism (7), inside of which is provided an arc-shaped limiting plate (73) located in a fixed state on the periphery of the inner rack structure (68), and an outer rack structure (74) arranged on the inner concave surface of the arc-shaped limiting plate (73) and capable of meshing with the inner rack structure (68).

7. A steel structure support according to claim 6, characterized in that: The fixed limiting mechanism (7) comprises an annular fixing plate (71) fixedly mounted on the upper surface of the bottom support base (1); a sleeve release hole (72) is provided at the center of the annular fixing plate (71); an arc-shaped limiting plate (73) integrally formed with the annular fixing plate (71) is provided on the upper end surface of the annular fixing plate (71); and a plurality of outer rack structures (74) integrally formed with the annular fixing plate (71) are provided on the inner concave surface of the arc-shaped limiting plate (73).

8. The steel structure support according to claim 7, characterized in that: The outer rack structure (74) is capable of meshing with the inner rack structure (68).

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