Universal rotating steel column support for connecting pin shaft and rotating drum in series

Abstract

The utility model provides a universal rotating steel column support for connecting a pin shaft and a rotating drum in series, which comprises a steel column, and a column bottom sealing plate is welded at the bottom of the steel column; the rotary drum stiffening plate is vertically welded on the column bottom sealing plate; the rotary drum is horizontally fixed on the rotary drum stiffening plate; an open containing space is formed in the upper portion of the outer sleeve, a lifting lug plate is welded to the lower portion of the outer sleeve, and the rotary drum is inserted into the containing space; the base comprises a base plate, a base lug plate and a lug plate stiffening plate, and the lifting lug plate is hinged to the base lug plate through a pin shaft; the rotary drum can horizontally rotate in the outer sleeve, the lifting lug plate can vertically rotate around the pin shaft, and the rotary drum and the lifting lug plate are connected in series to achieve universal rotation of the support. The steel column support can achieve universal rotation, is simple in structure, rapid to assemble and convenient to overhaul, and solves the problem that a steel column is bent and damaged due to the fact that the horizontal rotation bending moment of an existing one-way rotation support is too large.

Description

Technical Field

[0001] This invention belongs to the technical field of geological disaster prevention systems and relates to a universal rotating steel column support with a series pin and a rotating cylinder. Background Technology

[0002] Rockfall disasters are frequent in mountainous areas both domestically and internationally. Flexible protection systems, as an effective technology for preventing rockfall disasters, have been widely used in the prevention of slope geological hazards such as landslides and rockfalls, and practice has fully demonstrated their significant protective effects. The main components of a flexible protection system include steel columns, metal mesh panels, energy dissipators, and anchoring systems. In a flexible passive protection system, the steel column is the only compression member. Its base is usually fixed to the foundation with pins, possessing rotational capacity only in the vertical direction, and is normally under axial compression. However, under impact, the horizontal component of the force generated by the slippage of the upper support rope through the column end saddle can cause the steel column to sway laterally. Insufficient rotational capacity of the column base and excessive horizontal bending constraint not only easily cause premature damage to the pins but also induce buckling of the steel column along the constraint direction, which greatly weakens the structure's protective capacity. Existing omnidirectional rotating steel column supports with limited range can only rotate within a specific range, with limited rotation capacity and no control over the rotation amplitude. Furthermore, the contact surface of the support is thin and has low load-bearing capacity, making it difficult to apply to protection systems with high protection requirements. Therefore, there is an urgent need for an omnidirectional steel column support with high load-bearing capacity and controllable rotation amplitude. Utility Model Content

[0003] To address the aforementioned technical problems, this invention provides a universal rotating steel column support with a series pin and a rotating cylinder. This solves the problem of steel column compression and bending failure caused by excessive horizontal rotation moment in existing unidirectional rotating supports, and fills the gaps in controllability and load-bearing capacity of existing limited-width universal supports. It is suitable for protective structures with different energy level requirements.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A universal rotating steel column support with a series pin and a rotating cylinder includes:

[0006] A steel column, wherein a column base sealing plate is welded to the bottom of the steel column;

[0007] A rotating drum stiffening plate is vertically welded to the column bottom sealing plate;

[0008] A rotating drum, which is horizontally fixed to a stiffening plate;

[0009] An outer sleeve, the upper part of which is an open receiving space, and the lower part is welded with a lifting lug plate, and the rotating cylinder is inserted into the receiving space;

[0010] The base includes a base plate, a base ear plate, and an ear plate stiffening plate, wherein the ear plate is hinged to the base ear plate by a pin.

[0011] The rotating drum can rotate horizontally inside the outer sleeve, and the lifting lug plate can rotate vertically around the pin shaft. The two are connected in series to achieve universal rotation of the support.

[0012] Furthermore, two slender steel plates with pre-drilled holes are welded to the outer wall of the outer sleeve, and the limiting components are connected by limiting screws and nuts to restrict the horizontal displacement of the rotating drum.

[0013] Furthermore, the base ear plates are symmetrically welded to the base plate, and the ear plate stiffening plates are vertically welded between the base ear plates and the base plate.

[0014] Furthermore, the rotating drum is made of a seamless steel pipe, and the outer sleeve is made of an open steel pipe. The two are arranged horizontally on the same axis, and the rotating drum can rotate horizontally around the axis within the opening range of the outer sleeve.

[0015] Furthermore, the limiting member is fixed to the outer sleeve to limit the displacement of the rotating drum.

[0016] Furthermore, the outer sleeve is provided with two slender steel plates with pre-drilled holes, and the limiting member is connected to the pre-drilled holes through a limiting member screw; the bottom of one end of the outer sleeve is sealed with an outer sleeve sealing plate.

[0017] Furthermore, the lug plate is provided with lug plate openings, which correspond to the round holes on the base lug plate. The pin passes through the two openings, and the lug plate can rotate around the pin to provide vertical rotation capability.

[0018] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0019] (1) The present invention achieves universal rotation of the node by connecting the rotating drum and the pin shaft in series.

[0020] (2) The present invention can flexibly control the rotation amplitude through the synergistic effect of the outer sleeve and the limiting component.

[0021] (3) The present invention can flexibly adjust the strength and stiffness of the nodes by adjusting the stiffening components.

[0022] (4) The present invention can adapt to the manufacturing errors caused by the manufacturing and processing of most components and the deformation of components caused by transportation and construction, thereby reducing their impact on structural reliability.

[0023] This application utilizes a vertically rotating pin connected in series with a horizontally rotating cylinder, enabling the support steel column to rotate freely in all directions. The rotational capacity of the support steel column can be controlled by adjusting the opening angle of the outer sleeve and the thickness of the rotating cylinder, increasing the horizontal rotational capacity of the support steel column, releasing the bending moment at the column base support, preventing premature failure of the column base joint, and changing the stress mode of the steel column. After the support bending moment is released, the steel column becomes under axial compression. The pin and rotating cylinder, connected in series, participate in the stress, improving the stable bearing capacity of the steel column. This application's support steel column support can achieve omnidirectional rotation, has a simple structure, is quick to assemble, convenient to maintain, can be applied in batches, and is suitable for various flexible protective structure support supports. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a force diagram of the steel column in this invention;

[0026] Figure 2 This is a schematic diagram of the universal rotating column base support in this invention;

[0027] Figure 3 This is a structural diagram of the upper steel column and rotating cylinder in this invention;

[0028] Figure 4 This is a structural diagram of the rotating drum and outer sleeve in this invention;

[0029] Figure 5 This is a diagram showing the connection between the outer sleeve and the limiting member in this invention;

[0030] Figure 6 This is a structural diagram of the limiting member in this invention;

[0031] Figure 7 This is a diagram showing the connection between the outer sleeve and the base in this invention;

[0032] Figure 8 This is a schematic diagram of the horizontal rotation limiting angle in this invention;

[0033] Figure 9 This is a schematic diagram of the vertical rotation limiting angle in this invention.

[0034] In the diagram: 1-steel column, 2-column bottom sealing plate, 3-rotating drum stiffening plate, 4-rotating drum, 5-limiting component, 6-limiting component screw and nut, 7-outer sleeve sealing plate, 8-outer sleeve, 9-base ear plate, 10-pin, 11-base ear plate stiffening plate, 12-base plate, 13-base. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] like Figure 2-7 This application provides a universal rotating steel column support with a series pin and a rotating cylinder, characterized in that it includes:

[0037] A steel column 1, with a column bottom sealing plate 2 welded to its bottom;

[0038] Rotary drum stiffening plate 3, which is vertically welded to the column bottom sealing plate 2;

[0039] Rotating drum 4, which is horizontally fixed on the rotating drum stiffening plate 3;

[0040] The outer sleeve 8 has an open accommodating space at the top and a lifting lug plate 14 welded to the bottom. The rotating cylinder 4 is inserted into the accommodating space.

[0041] The base 13 includes a base plate 12, a base ear plate 9 and an ear plate stiffening plate 11, wherein the hanging ear plate 14 is hinged to the base ear plate 9 by a pin 10.

[0042] The rotating drum 4 can rotate horizontally within the outer sleeve 8, and the lifting lug 14 can rotate vertically around the pin 10. The two are connected in series to achieve universal rotation of the support.

[0043] The rotating cylinder 4 can rotate inside the outer sleeve 8, and the lifting lug 14 can rotate around the pin 10 inside the base 13. The pin 10 is connected in series with the rotating cylinder 4 to achieve universal rotation of the support; the maximum rotation angle of the support... θ max The calculation is performed using the following formula:

[0044]

[0045] In the formula, the diameter of the outer sleeve 8 is d 1. The unit is mm. The distance between the outer sides of the two ends of the opening of the outer sleeve 8 is...L 1. The unit is mm.

[0046] The rotating drum 4 is made of a seamless steel pipe, and the outer sleeve 8 is made of an open steel pipe. The two are coaxially and horizontally arranged, and the rotating drum 4 can rotate horizontally around the axis within the opening range of the outer sleeve 8.

[0047] This application also includes a limiting member 5, which is fixed on the outer sleeve 8; a limiting member screw and a nut 6, wherein the limiting member screw 61 passes through the limiting member 5 and is bolted to the outer sleeve 8 by the limiting nut 62, in order to limit the displacement of the rotating drum 4.

[0048] In this application, the outer sleeve 8 is provided with two slender steel plates with reserved holes, and the limiting member 5 is connected to the reserved holes through the limiting member screw 61; the bottom of one end of the outer sleeve 8 is closed by welding the outer sleeve sealing plate 7.

[0049] In this application, the diameter of the outer sleeve 8 is determined based on the cross-sectional dimensions of the steel column 1, and does not exceed the width of the steel column cross-section. A certain amount of rotational clearance is left between the rotating cylinder 4 and the outer sleeve 8. The diameter of the rotating cylinder 4 is determined based on the diameter of the outer sleeve 8. The thicknesses of the rotating cylinder 4 and the outer sleeve 8 are determined by the following formula:

[0050] Strength calculation based on compression-bending members:

[0051] In the formula, t The smaller of the thicknesses of the rotating drum 4 and the outer sleeve 8 is expressed in mm. h The height of the outer sleeve 8 steel column section is in mm; The design value for the axial pressure transmitted from the upper part, in N; M x The design value of the bending moment transmitted from the upper part is expressed in N•mm; f These are the strength design values ​​for the rotating drum 4 and the outer sleeve 8, in N / mm. 2 .

[0052] In this application, the diameter of the limiting screw 61 is... d 2 is determined by the following formula:

[0053] Calculate the screw diameter based on the shear strength value:

[0054] In the formula, d 2 represents the diameter of the limiting screw 61, in mm; This is the design value of the shear capacity of the screw, in N / mm². 2 ; This is the design value for the shear strength of the screw, in N / mm. 2 .

[0055] In this application, the base 13 includes a base plate 12 and two base ear plates 9 with open round holes fixed on the base plate 12, and the base 13 is rigidly connected to the foundation.

[0056] In this application, a lifting lug plate 14 is fixedly provided on the outer sleeve 8. The lifting lug plate 14 has a lifting lug opening, which corresponds to the circular hole on the base lug plate 9. The pin 10 passes through the two openings, and the lifting lug plate can rotate around the pin 10 to provide vertical rotation capability. Preferably, the upper opening of the outer sleeve 8 and the lifting lug plate 14 are arranged back to back, and the reverse extension line of the lifting lug plate 14 passes through the exact center of the opening.

[0057] In this application, the diameter of the pin 10 is determined by the following formula:

[0058]

[0059] In the formula, d 3 represents the diameter of the 10mm pin; The design value of the shear bearing capacity of pin 10 is given in N / mm². 2 ; This is the design value of the shear strength of pin 10, in N / mm. 2 .

[0060] The present application will be further described below with reference to the embodiments:

[0061] like Figure 1-9 As shown, this application discloses a universal rotating support for steel columns in a flexible protective system, applied in a flexible protective structure. It includes a rotating cylinder 4, a rotating cylinder stiffening plate 3, an outer sleeve 8, a limiting member 5, a pin 10, and a base 13. A sealing plate 2 is welded to the bottom of the steel column 1 and connected to the rotating cylinder 4. The rotating cylinder 4 is made of a seamless steel pipe and a rectangular steel plate. The outer sleeve 8 is made of an open steel pipe and a lifting lug plate welded together, with two slender steel plates with pre-drilled holes welded to its outer wall for connection with the limiting member 5. A sealing plate is welded to the bottom of one end of the outer sleeve. The plate is closed, and the rotating cylinder is inserted into the outer sleeve, which has the ability to rotate within the opening range; the limiting screw and nut 6 includes a screw 61 and a nut 62. The screw passes through the limiting sealing plate and the perforated plate welded on the outer sleeve 8 and is fastened with a nut to limit the large displacement of the rotating cylinder 4; the base 13 is made of a base plate 12 with two base ear plates 9 with open round holes welded on it. The pin 10 passes through the reserved holes on the hanging ear plate 14 and the base ear plate 9. The base ear plate stiffening plate 11 can be set as needed to provide the vertical rotation capability of the column foot.

[0062] This free-rotating support can achieve omnidirectional rotation, has a simple structure, is quick to assemble, is easy to maintain, can be applied in batches, and is suitable for supports of various flexible protective structures.

[0063] The steel column has a rectangular tube cross-section, with a width and height of 200mm. The design value for the axial load at the bottom is 500kN, and the design value for the shear load is 80kN. The steel used is Q355, but not limited to Q355. Therefore, the outer sleeve diameter is taken as 160mm.

[0064] The wall thicknesses of the inner and outer sleeves are determined by the following formula:

[0065]

[0066] In the formula, t This is the smaller of the thicknesses of the rotating drum and the outer sleeve, in mm; h The height of the rotating cylinder and the outer sleeve is taken as the cross-sectional height of the steel column, in mm. The design value for the axial pressure transmitted from the upper part, in N; M x The design value of the bending moment transmitted from the upper part is expressed in N•mm; f These are the design strength values ​​for the rotating drum and outer sleeve, in N / mm. 2 Therefore, taking the thickness of the rotating cylinder section as 14mm and the gap between the rotating cylinder and the outer sleeve as 2mm, the diameter of the rotating cylinder is 144mm; Q355 indicates that the yield strength of this steel is 355N / mm². 2 .

[0067] The rotating drum and its stiffening plate are tightly welded to the column base sealing plate.

[0068] The rotating cylinder is inserted into the outer sleeve, initially in a neutral position, and lubricating material is applied to the contact surface;

[0069] The limiting component is fastened to the outer sleeve by the screw and the nut. The screw passes through the limiting sealing plate and the opening plate welded on the outer sleeve, and the nut fastens the outer sleeve and the limiting sealing plate.

[0070] The screw diameter is determined by the following formula:

[0071]

[0072] In the formula, d 2 represents the screw diameter, in mm; This is the design value of the shear capacity of the screw, in N / mm². 2 ; This is the design value for the shear strength of the screw, in N / mm. 2 Therefore, the screw diameter is set to 9mm.

[0073] The diameter of the pin is determined by the following formula:

[0074]

[0075] In the formula, d 3 represents the pin diameter, in mm; This is the design value of the shear capacity of the pin, in N / mm². 2 ; This is the design value for the shear strength of the pin, in N / mm. 2 Therefore, the screw diameter is set to 45mm.

[0076] The stiffening plates of the rotating drum or the base ear plates are symmetrically arranged along the connection point. The number of stiffening plates is determined by the following formula:

[0077]

[0078] In the formula n For the number of stiffening plates, N This represents the design load value for the superstructure, in N (unit: N). α This is the load safety factor; d a This represents the maximum cross-sectional dimension of the stiffening plate, in mm. t s The stiffening plate thickness is in mm. f y This is the design value for the compressive strength of the stiffening plate, in N / mm². 2 The number of stiffening plates is calculated and rounded up. For example, in this embodiment, the calculation result is... n =3.38, the actual value is n =4.

[0079] Maximum horizontal rotation angle θ of the support x It can be determined using the following formula:

[0080]

[0081] In the formula θ max To represent the maximum rotation angle, the outer diameter of the outer sleeve is... d 1. The unit is mm. The distance between the outer sides of the two ends of the outer sleeve opening is... L 1. The unit is mm.

[0082] From this, the horizontal rotation angle can be obtained. θ x The limited range is:

[0083] 0°≤θ x ≤70°

[0084] Vertical rotation angle θ y The limited range is:

[0085] 0°≤θy ≤180°

[0086] This support can accommodate most of the manufacturing and construction errors of steel structure models, has reliable amplitude limiting capability, facilitates replacement and maintenance, and effectively solves the problem of assembly difficulties.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A gimbal steel column mount for a series pin shaft and a rotating drum, characterized by, The utility model relates to a kind of steel column support, including: Steel column (1), the bottom of the steel column (1) is welded with column bottom sealing plate (2); Rotary drum stiffening plate (3) is welded vertically on the column bottom sealing plate (2); Rotary drum (4) is horizontally fixed on the rotary drum stiffening plate (3); Outer sleeve (8), the upper part of the outer sleeve (8) is open space, the lower part is welded with lifting lug plate (14), the rotary drum (4) is inserted into the accommodation space; Base (13), including base plate (12), base lug plate (9) and lug plate stiffening plate (11), the lifting lug plate (14) is hinged with base lug plate (9) by pin shaft (10); The rotary drum (4) can rotate horizontally in the outer sleeve (8), the lifting lug plate (14) can rotate vertically around the pin shaft (10), and the two are connected in series to realize the universal rotation of support.

2. The support of claim 1, wherein Two elongated steel plates with reserved holes are welded on the outer wall of the outer sleeve (8), and the displacement of the rotary drum (4) is limited by connecting limiting piece (5) with limiting piece screw (61) and nut (62).

3. A support according to claim 2, characterised in that The base lug plate (9) is symmetrically welded on the base plate (12), and the lug plate stiffening plate (11) is vertically welded between the base lug plate (9) and the base plate (12).

4. The support of claim 1, wherein The rotary drum (4) is made of a seamless steel pipe, the outer sleeve (8) is made of an open steel pipe, and the two are coaxially arranged horizontally, and the rotary drum (4) can rotate horizontally around the shaft within the opening range of the outer sleeve (8).

5. The support of claim 2, wherein The limiting piece (5) is fixed on the outer sleeve (8) to limit the displacement of the rotary drum (4).

6. The support of claim 3, wherein The outer sleeve (8) is provided with two elongated steel plates with reserved holes, and the limiting piece (5) is connected to the reserved holes by limiting piece screw (61);One end of the outer sleeve (8) is closed at the bottom and welded with outer sleeve sealing plate (7).

7. The support of claim 5, wherein Lifting lug plate opening is arranged on the lifting lug plate (14), the lifting lug plate opening corresponds with the round hole on the base lug plate (9), the pin shaft (10) passes through the two openings, and the lifting lug plate can rotate around the pin shaft (10) to provide vertical rotation ability.

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