CN214302252U - Bolt-connected inner partition plate device - Google Patents

Abstract

The utility model discloses a bolt connects interior spacer device, including interior spacer, connecting plate and restraint pull rod or unilateral bolt. The size of the inner partition plate is matched with the size of the inner diameter section of the steel pipe column, the connecting plate is vertically arranged on the inner partition plate, and the connecting plate is connected with the side edge of the inner partition plate; the middle position of the inner partition plate is provided with a pouring hole, and the connecting plate is provided with a mounting hole. The connecting plate of baffle side including vertical setting is passed through to this scheme to and the setting of mounting hole on the connecting plate, can get rid of welding defect through unilateral bolt or restraint pull rod etc. with inner baffle and steel-pipe column etc. close cross-section steel member bolt joint, simultaneously, weaken the column wall that arouses to drilling and compensated, guarantee the local stability of steel member column wall, consequently can batch production, realize wide application.

Description

Bolt-connected inner partition plate device

Technical Field

The utility model belongs to the technical field of building structure, a bolt inner spacer device is related to.

Background

With the progress of science and technology and the increasing social demand, building structures continuously break through in height and span, compared with reinforced concrete structures, steel structures have the advantages of light weight, high strength, good plasticity and toughness, short construction period, energy conservation, environmental protection and the like, closed section steel members (such as steel box members, steel pipe columns and the like) improve the defects of poor corrosion resistance and easy instability on the basis, and can be combined with concrete to form a steel-concrete combined structure with more stable mechanical property, so the closed section steel members and the combined structure thereof are widely applied to modern large-scale complex steel structures such as large-span space steel structures and high-rise steel structures.

Firstly, in the lower floors of high-rise and super high-rise buildings of building engineering and road and bridge engineering, the section of a structural column is usually large, so that a steel member with large width and thickness ratio is adopted to avoid using a thick steel plate, which is beneficial to welding steel pipes and saves steel. However, when the width-thickness ratio of the plate continues to increase, even exceeds a certain limit, the steel tube is still inevitably partially bent before the limit bearing capacity of the component is reached, so that the overall bearing capacity of the component is reduced, and therefore, various measures are required to be taken to delay or avoid bending of the section of the steel column to become heavy.

At present, scholars at home and abroad try to ensure the local stability of the wall of the steel member column by means of the measures of arranging a restraining pull rod, a corner brace, a pair pull sheet, arranging a straight rib, an inclined rib, a stud and the like, improve the tightening effect of the member and improve the stress performance of the steel member with large width-thickness ratio. Although the buckling resistance of the steel member column wall is improved to different degrees by the above construction measures, the construction measures still have respective disadvantages, such as the arrangement of the corner brace, the arrangement of the pull tab, the arrangement of the straight rib, the arrangement of the inclined rib and other construction measures obviously have the problems of inconvenient operation, difficult guarantee of welding quality and the like; and the arrangement of the constraint pull rod causes the problems of weakening of the column wall and the like due to drilling. Therefore, when the buckling-restrained structure is arranged on the steel member with the large width-thickness ratio bearing the bending load, the development of the novel stiffening device which is convenient to operate, can avoid welding defects and is used for weakening the column wall caused by drilling and compensating is very important.

Secondly, in the anti-seismic design of the multi-story and high-rise steel structure house, the problems of beam-column connection mode and design method are a key problem which needs to be solved urgently. Among the numerous node connection structural forms, the inner partition plate type node is a connection form which is commonly applied to connection of box section columns and H-shaped steel beams at present, and is one of two structures of square steel tube concrete column and steel beam connection nodes which are particularly recommended by technical regulations of rectangular steel tube concrete structures (CECS 159: 2004). However, the traditional inner partition board node has many defects in the aspects of construction, construction method and the like: for the column with box section welded by 4 steel plates, the construction method is that 3 wall plates with built-in diaphragm plates and columns are welded firstly, and the connection with the 4 th wall plate can only be solved by electroslag welding with a melting nozzle from the outside. The built-in diaphragm plate node obviously has the defects of complex construction and difficult guarantee of welding quality; for the connection of the cold-bending rectangular steel pipe column and the section steel beam, because the flange of the column is generally larger than the flange of the I-shaped steel beam in size, under the condition of not arranging the built-in diaphragm (horizontal stiffening rib), the bending moment of the beam end can cause the column wall plate to be bent to generate obvious deformation, the requirement of rigid connection can not be met, and the node is not beneficial to earthquake resistance. The construction method of the built-in diaphragm plate comprises the steps of cutting off the cold-bending rectangular steel pipe column at the main shaft of the section steel beam, welding the diaphragm plate at the position corresponding to the flange of the section steel beam, and then welding the cold-bending rectangular steel pipe columns together. Although the built-in diaphragm plate joint meets the requirement of a rigid joint, the construction is inconvenient, the judgment on whether the position of the diaphragm plate is correct and the ultrasonic flaw detection inspection of a welding part are not easy to carry out, and the welding defect discovered after the assembly is almost impossible to correct.

To better solve the problem of difficulty in constructing the built-in diaphragm, a C-shaped column product (built-in diaphragm type) for buildings is proposed in cold-formed steel products for buildings in japan, and the product is specially used for box columns, and is used for steel pipe columns and concrete filled steel tube (CFT) columns. The method is characterized in that a built-in diaphragm plate is divided into two halves, the half diaphragm plate is placed at a preset position before a box section is formed, the half diaphragm plate is welded with a column, and then two C-shaped steels welded with the half diaphragm plate are connected into a box shape by using a longitudinal welding line. The C-shaped cold-formed column product well solves the problem that the built-in diaphragm plate is difficult to construct, has a good reference effect on cold-formed steel in China, but has the problems that the welding seam quality is difficult to guarantee and the like due to welding operation of the product.

At present, with the implementation of strategic measures of green buildings and building industrialization being comprehensively promoted by the country, the development of cold-forming building structures is greatly promoted to develop prefabricated building systems, and overcoming the defects of the existing inner partition plate products is one of the problems to be solved.

Therefore, it is very important to try to find an inner partition plate product which is simple in construction and convenient to install and can avoid welding defects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the bolted inner partition plate device is simple in construction and convenient to install.

The utility model adopts the technical scheme as follows:

a bolted inner baffle device comprises an inner baffle and a connecting plate, wherein the size of the inner baffle is matched with the size of the inner diameter section of a steel pipe column, the connecting plate is vertically arranged on the inner baffle, and the connecting plate is connected with the side edge of the inner baffle; the middle position of the inner partition plate is provided with a pouring hole, and the connecting plate is provided with a mounting hole. With the setting of steel-pipe column cross-sectional dimension complex inner baffle, a pipe wall provides the support to steel-pipe column node, the setting in pouring the hole, subsequent concrete of being convenient for pours, the connecting plate of baffle side including vertical setting, then can hug closely with the steel-pipe column inner wall, with this through the mounting hole on the connecting plate with inner baffle and steel-pipe column connection (unilateral bolted connection, restraint pull rod or wear core bolt (to the stay bolt) mode all can), welding defect has been got rid of, and the construction is simple, simple to operate.

It is worth mentioning that the lengths of the two sides of the inner baffle plate can be the same or different, so that the cold-bending square or rectangular steel pipe column can be widely used.

Preferably, the connecting plate is formed by cold bending the inner partition plate through a cold working forming process, and a stiffening part is arranged at the connecting position of the connecting plate and the inner partition plate. The connecting plate that the clod wash formed, the effect of resisting to external load can be improved in the setting of its stiffening part, and the setting of connecting plate then can guarantee its and interior baffle's connection effect, can also weaken the column wall that arouses to the drilling and compensate, improves the bearing capacity of steel-pipe column.

Preferably, the stiffening part extends upwards in an arc shape from the side edge of the inner partition plate to be connected with the connecting plate. The arc stiffening part can be formed at one time in the cold bending process, is convenient to process, and more importantly, the post-yield strength of the stiffening part can be fully utilized to resist the tensile pressure equivalent to the beam end bending moment, so that the thickness of the inner baffle plate can break through the limitation that the existing specification should equal the thickness of the horizontal stiffening rib and the beam flange or be more than the thickness of the beam flange by 2cm so as to achieve the purpose of saving steel, and the length of the stiffening part in the same direction (namely the clear distance in the steel pipe column) is equal to the sum of the length of the inner baffle plate in the direction and the fillet radius of the two stiffening parts in the vertical direction.

It is worth mentioning that the stiffening part can effectively transmit all horizontal loads, so the pouring hole can break through the specification of the traditional welding inner partition plate pouring aperture size, and the maximum dimension is the same as the short edge dimension of the inner partition plate, so the resistance in the concrete pouring process can be reduced, the compactness of concrete is improved, and the pouring quality of the steel pipe concrete is ensured.

Preferably, the mounting holes comprise a plurality of mounting groups, each mounting group comprises two mounting holes arranged on the alignment connecting plate, the two mounting holes of each mounting group are coaxially arranged, and a first positioning hole and a second positioning hole matched with the mounting groups are arranged on the side wall of the steel pipe column. Through the setting of two mounting holes and first, second locating hole on the counterpoint connecting plate, can adopt different modes to install fixedly (restraint pull rod wears admittedly, unilateral bolted connection is fixed), convenient to use according to the condition. In practical use, the number and the diameter of the mounting holes depend on the section size of the steel pipe column. It is worth mentioning that the circle center height difference of different mounting holes needs to be staggered by the distance of at least the diameter length of the screw of the unilateral bolt or the diameter length of the constraint pull rod in the mutually perpendicular planes so as to reduce the weakening of the column wall, and meanwhile, the mutual interference between the constraint pull rods is avoided, and the mounting effect is ensured.

Preferably, the inner partition plate is fixed through a constraint pull rod, the sizes of the first positioning hole, the second positioning hole and the mounting hole are matched with the size of the cross section of the constraint pull rod, and the constraint pull rod sequentially penetrates through the first positioning hole, the mounting group and the second positioning hole and then is fixedly arranged. The arrangement of the constraint pull rod can further ensure the local stability of the wall of the steel member column when the inner partition plate is installed and positioned, improve the hooping effect of the member, improve the stress performance of the steel member with large width-thickness ratio and strengthen the steel member by matching with the inner partition plate.

Preferably, one end of the restraint pull rod is welded with the steel pipe column, and the other end of the restraint pull rod is provided with external threads. The welding end of the restraint pull rod is fixed with the steel pipe girth welding through the cushion block at the end part, the influence on the internal partition plate structure is avoided, and the external thread end is screwed through the bolt, so that the tightening effect is improved.

Furthermore, the restraining tie-rod is only one of the construction forms of the double-sided bolt connection by penetrating the cross section of the steel pipe column. The tie-down rods may be replaced by split (through) bolts, through-core bolts, etc.

Preferably, the inner partition plate is fixed by a single-side bolt, the sizes of the first positioning hole, the second positioning hole and the mounting hole are matched with the size of the cross section of the single-side bolt, and the single-side bolt is suitable for fixing the inner partition plate by connecting the first positioning hole and the mounting hole and connecting the second positioning hole and the mounting hole. But unilateral bolt includes the bolt of a unilateral connection steel pipe etc. closed section, so-called Blind eye bolt (Blind Bolts) promptly, the utility model discloses use unilateral bolt Hollo-bolt as an example, it is different from expansion Bolts, and it possesses from the strong clamping system of height, has better atress performance, and only adopts torque wrench or other mounting tool alright screw up the connecting piece and fix on one side, and consequently the job site installation is convenient.

Preferably, the inner partition is symmetrically divided into a left partition unit and a right partition unit. The setting of left baffle unit and right baffle unit can be installed inner baffle segmentation (divide two subassemblies to install) and avoid appearing the dead condition of card including baffle propulsion in-process (because inner baffle size and the hollow size cooperation of steel-pipe column, pushing away inner baffle to the mounted position in-process, the friction of inner baffle and steel-pipe column inner wall easily appears, influences propulsive condition), simple to operate. It is worth mentioning that when the left and right partition plate units are symmetrically divided, the cold-bending steel pipe column is mainly applied to a seamless or single-seam cold-bending square steel pipe column.

Preferably, four air holes are distributed on the inner partition plate. The arrangement of the air holes is used for ensuring that concrete is filled in all positions inside the steel pipe column in the pouring process, the compactness of the concrete is improved, and 4 air holes are usually arranged according to standards and specifications such as 'design Standard of Steel Structure' (GB V50017-2017).

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, through the connecting plate of baffle side including vertical setting to and the setting of mounting hole on the connecting plate, be used for with inner baffle and steel-pipe column bolt joint, got rid of welding defect, construction is simple, simple to operate, simultaneously, weakens to the column wall that the drilling arouses and has carried out the compensation, guarantees the local stability of steel member column wall.

2. The utility model discloses in, through the yield back intensity of its stiffening part of make full use of resist the beam-ends moment of flexure equivalence become draw pressure, inner baffle thickness can break through current standard to horizontal stiffening rib should with the beam flange uniform thickness or be greater than the restriction of beam flange thickness 2cm in order to reach the purpose of practicing thrift steel.

3. The utility model discloses in, can transmit whole horizontal loads effectively through its part of putting more energy into, consequently its hole of pouring can break through the regulation of standard to traditional welding inner baffle pouring aperture size, the at utmost with inner baffle minor face size the same, so can reduce the resistance of concrete pouring in-process, improve the closely knit degree of concrete, guarantee the quality of pouring of steel pipe concrete.

4. The utility model discloses in, when being used for the beam column node, the connecting plate can carry out thickness to node domain post wall and strengthen, forms "strong post", "strong node" structure of antidetonation design.

5. The utility model discloses in, when adopting the restraint pull rod to connect, it will be traditional welding inner baffle and existing restraint pull rod or wear effective combination of connection structure such as core bolt, and it respectively gets for a long time, and complementary its is short, weakens the compensation to the column wall that drilling arouses when avoiding welding defect again, and the mechanical properties of full play material is clearly and definitely passed power again.

6. The utility model discloses in, when fixing through the mode of unilateral bolt, only adopt torque wrench or other mounting tool alright screw up the connecting piece and fix on one side, it is convenient to install to, when putting more energy into when the node domain that is used for the beam column node, because of its possess the high strong performance of shearing, consequently can transmit effectively and resist the beam-ends shear force.

7. The utility model discloses in, when the post connects into box cross section by two C shape steel with vertical welding seam, the inner baffle can be installed as a whole, so can guarantee to pass power more continuously, clearly and definitely.

8. The utility model discloses in, when adopting for seamless or single slit steel-pipe column, through the setting of the two baffle units of cutting apart, under the condition that does not influence the atress, be convenient for install.

9. The utility model discloses in, the baffle device in the bolt joint can be installed fast under special mounting tool's cooperation, consequently can batch production, satisfies the demand of various cross-section steel-pipe columns, realizes the prefabricated component production integration industrialization of being under construction, will promote the development of assembly type structure

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of the middle inner partition plate of the present invention.

Fig. 2 is a schematic structural diagram of the right-middle partition plate unit of the present invention.

Fig. 3 is a schematic structural diagram of the middle single-side bolt of the present invention.

Fig. 4 is a schematic structural view of the middle restraint pull rod of the present invention.

FIG. 5 is a schematic structural diagram of a steel pipe column with a large width-thickness ratio and an inner partition plate connected through a single-side bolt in a bolted mode.

FIG. 6 is a schematic structural diagram of a steel pipe column with a large width-thickness ratio and a bolted inner partition plate connected through a constraint pull rod.

FIG. 7 is an installation schematic diagram of a single-side bolted inner bulkhead stiffened all-welded rigid beam-column joint.

FIG. 8 is an installation schematic diagram of a tie-bar tie-in bolted inner bulkhead stiffened all-welded rigid beam-column joint.

The labels in the figure are: the steel pipe column structure comprises 1-a steel pipe column, 2-an inner partition plate, 3-a connecting plate, 4-a pouring hole, 5-a stiffening part, 6-a mounting hole, 7-a constraint pull rod, 8-a single-side bolt, 9-a left partition plate unit, 10-a right partition plate unit, 11-an air hole and 12-a steel beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The first embodiment is as follows:

as shown in fig. 1, 2, 4, 6 and 8, a bolted inner partition device comprises an inner partition 2 and a connecting plate 3, wherein the size of the inner partition 2 is matched with the size of the inner diameter section of a steel pipe column 1, the connecting plate 3 is vertically arranged on the inner partition 2, and the connecting plate 3 is connected with the side edge of the inner partition 2; the middle position of the inner partition board 2 is provided with a pouring hole 4, a mounting hole is arranged on the connecting board 3, the connecting board 3 is formed by the inner partition board 2 through cold forming by a cold forming process, a stiffening part 5 is arranged at the joint of the connecting board 3 and the inner partition board 2, the stiffening part 5 is formed by the arc-shaped side edge of the inner partition board 2 and upwards extends to be connected with the connecting board 3, the mounting hole comprises two mounting groups, each mounting group comprises two mounting holes 6 arranged on two corresponding connecting boards 3, the same two mounting holes 6 of each mounting group are coaxially arranged, a first positioning hole and a second positioning hole which are matched with the mounting groups are arranged on the side wall of the steel pipe column 1, four air holes 11 are distributed on the inner partition board 2 according to the design standard of a steel structure, the inner partition board 2 is fixed through a constraint pull rod 7, and the first positioning hole is distributed on the side wall of the steel pipe column 1, The sizes of the second positioning hole and the mounting hole 6 are matched with the size of the section of the restraint pull rod 7, the restraint pull rod 7 sequentially penetrates through the first positioning hole, the mounting group and the second positioning hole and then is fixedly arranged, one end of the restraint pull rod 7 is welded with the steel pipe column 1, and the other end of the restraint pull rod 7 is provided with external threads.

In the installation process, for a seamless or single-seam cold-bent square steel pipe column, the inner partition plate 2 is symmetrically divided into a left partition plate unit 9 and a right partition plate unit 10, the left partition plate unit 9 is pushed into the steel pipe column 1 under the cooperation of a special installation device, the left partition plate unit 9 is positioned through the first positioning hole and the mounting hole 6, after the left partition plate is installed, the threaded end of the restraint pull rod 7 penetrates through the first positioning hole and the mounting hole 6, the left partition plate unit 9 is positioned firstly, when the right partition plate descends to the matching position, the restraint pull rod 7 is pushed to penetrate through the mounting hole 6 and the second positioning hole (the rest restraint pull rod 7 is directly inserted into a specified position subsequently), then, the threaded end of the restraint pull rod 7 is fastened through a nut, and finally the head of the restraint pull rod 7 is welded to complete installation.

For a cold-formed square steel pipe column formed by welding two C-shaped steel double seams: firstly, selecting a piece of C-shaped steel according to the size of a steel pipe column and reserving a first positioning hole and a second positioning hole; then, the device and the C-shaped steel are preliminarily fixed: c-shaped steel flange side: the threaded end of the restraint pull rod 7 sequentially penetrates through the first positioning hole, the first mounting hole 6, the second mounting hole 6 and the second positioning hole, and a screw cap is screwed down; c-shaped steel web side: the threaded end of the restraint pull rod 7 sequentially penetrates through the first positioning hole, the first mounting hole 6 and the second mounting hole 6; then, positioning of another piece of C-section steel of the steel pipe column 1 is completed: the threaded end of the restraint pull rod 7 continuously penetrates through the second positioning hole; then the threaded end of the restraint pull rod 7 is initially screwed and fastened through a nut; further, connecting the two C-shaped steels by using a longitudinal welding seam to form a steel pipe column 1; and finally, finishing screwing the threaded end of the restraint pull rod 7, and welding the head of the restraint pull rod to finish the installation.

Example two:

specifically, as shown in fig. 1, 2, 3, 5, and 7, the inner partition 2 is fixed by a single-sided bolt 8, the sizes of the first positioning hole, the second positioning hole, and the mounting hole 6 are all matched with the cross-sectional size of the single-sided bolt 8, and the single-sided bolt 8 is adapted to fix the inner partition 2 by connecting the first positioning hole and the mounting hole 6 and connecting the second positioning hole and the mounting hole 6.

For a seamless or single-slit cold-bending square steel pipe column, the inner partition plate 2 is symmetrically divided into a left partition plate unit 9 and a right partition plate unit 10, after the left partition plate is installed, a single-side bolt 8 penetrates through the first positioning hole and the mounting hole 6, the right partition plate is lightly screwed and positioned, when the right partition plate is placed to a matching position, the right partition plate is fixed by another single-side bolt 8, the rest mounting holes 6 are positioned by the single-side bolts 8, and the bolts are screwed tightly to complete installation.

For a cold-formed square steel pipe column formed by welding two C-shaped steel double seams: firstly, selecting a piece of C-shaped steel according to the size of a steel pipe column and reserving a first positioning hole and a second positioning hole; then, the device and the C-shaped steel are preliminarily fixed: sequentially penetrating the unilateral bolt 8 through the first positioning hole, namely the first mounting hole 6, applying pretightening force and screwing; further, connecting the two C-shaped steels by using a longitudinal welding seam to form a steel pipe column 1; and then, finishing the installation work of the web and the flange of the second piece of C-shaped steel: and sequentially passing the unilateral bolt 8 through the second positioning hole and the second mounting hole 6, applying pretightening force and screwing.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The utility model provides a bolt inner baffle device, includes inner baffle (2) and connecting plate (3), its characterized in that, inner baffle (2) size sets up with the internal diameter cross-sectional dimension cooperation of steel-pipe column (1), wherein:

the connecting plate (3) is vertically arranged on the inner partition plate (2), and the connecting plate (3) is connected with the side edge of the inner partition plate (2);

the middle position of the inner partition plate (2) is provided with a pouring hole (4), and the connecting plate (3) is provided with a mounting hole (6).

2. A bolted inner spacer arrangement according to claim 1, characterized in that said connection plate (3) is formed by cold bending said inner spacer (2) by a cold forming process, and that the junction of said connection plate (3) and said inner spacer (2) is provided with a stiffening portion (5).

3. A bolted inner spacer arrangement according to claim 2, characterized in that said stiffening part (5) extends from the side of said inner spacer (2) upwards in a circular arc to the connection with said web (3).

4. A bolted inner spacer device according to claim 1, wherein the mounting holes comprise a plurality of mounting groups, each mounting group comprises two mounting holes (6) arranged on two connecting plates (3), the two mounting holes (6) of the same mounting group are coaxially arranged, and a first positioning hole and a second positioning hole matched with the mounting groups are arranged on the side wall of the steel pipe column (1).

5. A bolted inner spacer device according to claim 4, characterized in that the inner spacer (2) is fixed by a constraint pull rod (7), the dimensions of the first positioning hole, the second positioning hole and the mounting hole (6) are all matched with the cross-sectional dimension of the constraint pull rod (7), and the constraint pull rod (7) is fixed after sequentially passing through the first positioning hole, the mounting group and the second positioning hole.

6. A bolted inner spacer device according to claim 5, characterized in that one end of the tie-rod (7) is welded to the steel pipe column (1) and the other end of the tie-rod (7) is provided with external threads.

7. A bolted inner spacer device according to claim 4, characterized in that said inner spacer (2) is fixed by a single-sided bolt (8), said first positioning hole, said second positioning hole and said mounting hole (6) are all sized to fit the cross-sectional size of said single-sided bolt (8), said single-sided bolt (8) is adapted to fix the inner spacer (2) by connecting the first positioning hole with the mounting hole (6) and the second positioning hole with the mounting hole (6).

8. A bolted inner partition arrangement according to claim 1, characterized in that said inner partition (2) is symmetrically divided into a left partition unit (9) and a right partition unit (10).

9. A bolted inner spacer device according to any one of claims 1 to 8, characterized in that four ventilation holes (11) are arranged in said inner spacer (2).

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