A roof steel structure support device

Abstract

The application relates to the field of roof support, in particular to a roof steel structure support device. The device comprises vertical square steels and four groups of horizontal channel steels, and further comprises a splicing unit. The number of channel steels in each group is two, and the four groups of channel steels are arranged in a cross shape. The splicing unit is located directly above the square steel, the lower surface of the splicing unit is provided with a first sleeve, the first sleeve is inserted into the upper end of the square steel, and the lower surface of the splicing unit is tightly matched with the upper end surface of the square steel. The four side surfaces of the splicing unit are respectively provided with I-shaped insertion grooves, the end portions of the two channel steels in each group are spliced into an I shape and are inserted into the I-shaped insertion grooves. The end portions of the channel steels and the splicing unit are provided with through holes with horizontal center axes and perpendicular to the channel steels, the center axes of the through holes penetrate the I-shaped insertion grooves, bolts are inserted into the through holes, and the channel steels and the splicing unit are tightly connected through the bolts. The connection strength and stability of the crossbeam and the stand at the cross intersection are improved, the device is convenient to disassemble, maintain and install, and the installation efficiency is high.

Description

Technical Field

[0001] This application relates to the field of roof support, and more particularly to a roof steel structure support device. Background Technology

[0002] Roof support structures mainly include beam-column structures made of reinforced concrete and beam-column structures made of steel. Reinforced concrete beams and columns are usually cast in one piece of concrete, so they have high connection strength and good stability, but they are heavy and difficult to disassemble and modify. Steel beams and columns are usually connected by welding or bolts. Welding has better connection strength and stability, but it is also not convenient for later disassembly and modification. Therefore, bolts are usually used to facilitate later disassembly and modification.

[0003] When using bolted connections, existing technologies typically involve drilling holes in the side walls of the columns and beams (columns are usually made of square steel, and beams are usually made of channel steel or H-beams) and inserting bolts into the through holes to secure the connection. In this connection method, the stress is mainly concentrated on the bolts and the inner walls of the through holes, which can easily lead to large stress deformation, especially at the cross intersections. Holes need to be drilled on all four sides of the column, resulting in reduced structural strength, large stress deformation, low load-bearing capacity, and poor stability at the drilling points. Summary of the Invention

[0004] In view of this, a roof steel structure support device is proposed to improve the connection strength and stability of the beams and columns at the cross intersection.

[0005] This application provides a roof steel structure support device, including vertical square steel and four sets of horizontal channel steel, and also includes splicing units. Each set of channel steel consists of two channels, with the backs of the two channels in each set abutting each other. The openings of the channels face horizontally, and the ends of the four sets of channels are all connected to the square steel through the splicing units. The four sets of channels are arranged in a cross shape.

[0006] The splicing unit is located directly above the square steel. The lower surface of the splicing unit has a first sleeve. The first sleeve is inserted into the upper end of the square steel. The outer side of the first sleeve is in close contact with the inner side of the square steel. The lower surface of the splicing unit is pressed against the upper end surface of the square steel.

[0007] The splicing unit has four sides: front, rear, left, and right. Each of the four sides of the splicing unit is provided with an I-shaped slot. The ends of two channel steels in each group are spliced ​​into an I-shape and inserted into the I-shaped slot.

[0008] The end of the channel steel and the splicing unit are provided with through holes with a central axis set horizontally and perpendicular to the channel steel. The central axis of the through hole passes through the I-shaped slot. A bolt is inserted into the through hole, and the channel steel and the splicing unit are fastened together by the bolt.

[0009] The two channel steels in each group are symmetrically arranged with the central plane between the two parallel and opposite outer surfaces of the square steel as the symmetrical face.

[0010] In some embodiments of the above-mentioned roof steel structure support device, the splicing unit includes a horizontal support plate, the first sleeve is vertically fixedly connected to the center position of the lower surface of the support plate, the lower surface of the support plate is pressed against the upper end face of the square steel, the I-shaped slot is located above the support plate, and the outer lower surface of the channel steel is pressed against the upper surface of the support plate.

[0011] In some embodiments of the above-mentioned roof steel structure support device, the splicing unit further includes a grid-shaped frame, which is vertically arranged and located above the support plate. The grid-shaped frame is detachably connected to the support plate. The ends of each group of channel steels are respectively located in the four U-shaped cavities of the grid-shaped frame. The I-shaped slot is located inside the U-shaped cavity. The end face of the channel steel abuts against the side of the U-shaped cavity that is perpendicular to the channel steel. The opening edge of the channel steel abuts against the side wall of the U-shaped cavity that is parallel to the channel steel. The through hole on the splicing unit is provided on the side wall of the U-shaped cavity that is parallel to the channel steel and penetrates the side wall of the U-shaped cavity.

[0012] In some embodiments of the above-mentioned roof steel structure support device, the splicing unit further includes a second sleeve, which is arranged vertically and located above the support plate. The lower end of the second sleeve is fixedly connected to the support plate. The second sleeve is inserted into the U-shaped cavity of the grid frame. The outer side of the second sleeve is in close contact with the inner side of the U-shaped cavity. The projection of the outer side of the U-shaped cavity in the vertical direction is located inside the square steel.

[0013] In some embodiments of the above-mentioned roof steel structure support device, two side walls parallel to the channel steel on the inner side of the U-shaped cavity are respectively provided with C-shaped plates. Two C-shaped plates in the same U-shaped cavity are arranged back to back and spaced apart. The I-shaped slot is formed by the upper surface of the support plate, the inner side of the U-shaped cavity, and the outer side of the C-shaped plate. The inner side of the channel steel is in close contact with the outer side of the C-shaped plate. The through holes on the splicing unit are respectively provided on the side wall parallel to the channel steel on the inner side of the U-shaped cavity and on the side wall of the C-shaped plate. The end of the bolt is located in the L-shaped cavity of the grid frame.

[0014] In some embodiments of the above-mentioned roof steel structure support device, the top surface of the grid frame and the top surface of the channel steel are located on the same plane, or the top surface of the grid frame is lower than the top surface of the channel steel.

[0015] In some embodiments of the above-mentioned roof steel structure support device, the splicing unit further includes a third sleeve fixedly connected to the lower surface of the support plate. The third sleeve is arranged around the first sleeve, and the inner side of the third sleeve is spaced apart from the outer side of the first sleeve. The upper end of the square steel is inserted into the space between the third sleeve and the first sleeve, and the outer side of the square steel is in close contact with the inner side of the third sleeve.

[0016] In some embodiments of the above-mentioned roof steel structure support device, the splicing unit further includes a stiffening plate, which is vertically arranged and located directly below the center of the I-shaped slot and outside the third sleeve. The stiffening plate is a right-angled triangle, with one right-angled side of the stiffening plate fixedly connected to the lower surface of the support plate, and the other right-angled side of the stiffening plate fixedly connected to the outer side of the third sleeve.

[0017] In some embodiments of the above-mentioned roof steel structure support device, the thickness of the support plate and the wall thickness of the first sleeve are both greater than the wall thickness of the second sleeve, and the wall thickness of the second sleeve is equal to the wall thickness of the grid frame.

[0018] In some embodiments of the above-mentioned roof steel structure support device, an L-shaped pressure plate is fixedly connected to the bottom of the L-shaped cavity, the lower surface of the L-shaped pressure plate is pressed and fitted with the upper surface of the support plate, and the support plate is provided with L-shaped notches at the four corners corresponding to each L-shaped cavity. The inner side of the L-shaped notch is aligned with the inner side of the L-shaped pressure plate in the vertical direction.

[0019] The effects of the invention

[0020] At the intersection, the ends of the four sets of channel steel are connected to the upper ends of the square steel via splicing units. The roof presses down on the channel steel, and the load on the channel steel is transferred to the splicing units. Because the lower surface of the splicing unit is tightly fitted to the upper end face of the square steel, the vertical compressive stress is evenly distributed on the upper end face of the square steel, reducing the local maximum compressive stress on the upper end of the square steel and weakening the stress concentration effect. The I-shaped slots guide and position the ends of each channel steel, facilitating installation and limiting the horizontal movement of the channel steel, resulting in high stability. When the channel steel is subjected to horizontal forces or undergoes bending deformation due to roof pressure, The channel steel applies a horizontal force to the splicing unit. The splicing unit distributes this horizontal force to the inner surface of the upper end of the square steel through the first sleeve, reducing the local maximum compressive stress on the upper end of the square steel and weakening the stress concentration effect. The lower surface of the channel steel is pressed tightly against the bottom surface inside the I-shaped slot, and most of the stress is transferred to the bottom surface inside the I-shaped slot and then to the upper end surface of the square steel, reducing the local maximum stress on the end of the channel steel and weakening the stress concentration effect. This improves the connection strength and stability between the crossbeam and the column at the cross intersection, and facilitates disassembly and maintenance, resulting in high installation efficiency. Attached Figure Description

[0021] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0022] Figure 1 This is a structural schematic diagram of a roof steel structure support device at a cross intersection in an embodiment of this application;

[0023] Figure 2 yes Figure 1 Top view;

[0024] Figure 3 It is along Figure 2 Sectional view of line AA in the middle;

[0025] Figure 4 It is along Figure 2 Sectional view of the middle BB line;

[0026] Figure 5 This is a schematic diagram of the splicing unit in the embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the connection between the tray and the second sleeve in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the connection between the tray and the first sleeve in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the grid-shaped frame structure in the embodiments of this application;

[0030] Figure 9 yes Figure 8 A structural diagram of the grid-like frame from another perspective;

[0031] Figure 10 This is a schematic diagram of the structure of the C-shaped plate in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures

[0033] 100. Square steel; 102. Channel steel; 104. Splicing unit; 106. First sleeve; 108. I-shaped slot; 110. Bolt; 112. Support plate; 114. Grid frame; 116. U-shaped cavity; 118. Second sleeve; 120. U-shaped cavity; 122. C-shaped plate; 124. L-shaped cavity; 126. Third sleeve; 128. Rib plate; 130. L-shaped pressure plate; 132. L-shaped notch; 134. Through hole. Detailed Implementation

[0034] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise. The term "exemplary" as used herein means "serving as an example, embodiment, or illustration." Any embodiment illustrated herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. Furthermore, for the purpose of better illustrating this application, those skilled in the art will understand that numerous specific details are set forth in the various embodiments described below. This application can be practiced without certain specific details. In some embodiments, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the spirit of this application.

[0035] Combination Figures 1 to 4As shown, this application embodiment provides a roof steel structure support device, including a vertical square steel 100 and four sets of horizontal channel steels 102, and also includes splicing units 104. Each set of channel steels 102 consists of two channels, with the backs of the two channels 102 in each set abutting each other. The openings of the channel steels 102 face horizontally. The ends of the four sets of channel steels 102 are all connected to the square steel 100 through the splicing units 104, and the four sets of channel steels 102 are arranged in a cross shape. The splicing unit 104 is located directly above the square steel 100. The lower surface of the splicing unit 104 has a first sleeve 106, which is inserted into the upper end of the square steel 100. The outer side of the first sleeve 106 is in close contact with the inner side of the square steel 100. The lower surface of the splicing unit 104... The surface is pressed tightly against the upper end face of the square steel 100; the splicing unit 104 has four sides: front, rear, left, and right. Each of the four sides of the splicing unit 104 is provided with an I-shaped slot 108. The ends of the two channel steels 102 in each group are spliced ​​into an I-shape and inserted into the I-shaped slot 108; the ends of the channel steels 102 and the splicing unit 104 are provided with through holes 134 with the central axis set horizontally and perpendicular to the channel steels 102. The central axis of the through holes 134 passes through the I-shaped slot 108. Bolts 110 are inserted into the through holes 134. The channel steels 102 and the splicing unit 104 are fastened together by bolts 110; the two channel steels 102 in each group are symmetrically arranged with the central plane between the two parallel and opposite outer sides of the square steel 100 as the symmetrical face.

[0036] At the intersection, the ends of the four sets of channel steels 102 are connected to the upper end of the square steel 100 through splicing units 104. The roof presses down on the channel steels 102, and the load on the channel steels 102 is transferred to the splicing units 104. Since the lower surface of the splicing unit 104 is pressed tightly against the upper end face of the square steel 100, the vertical compressive stress is evenly distributed on the upper end face of the square steel 100, reducing the local maximum compressive stress on the upper end of the square steel 100 and weakening the stress concentration effect. The I-shaped slot 108 guides and positions the ends of each channel steel 102, facilitating installation and limiting the horizontal movement of the channel steels 102, resulting in high stability. When the channel steels 102 are subjected to horizontal forces or bend due to roof pressure, the channel steels 102 will apply horizontal force to the splicing unit 104. The horizontal force is distributed by the splicing unit 104 through the first sleeve 106 to the inner surface of the upper end of the square steel 100, reducing the local maximum compressive stress on the upper end of the square steel 100 and weakening the stress concentration effect. The lower surface of the channel steel 102 is pressed tightly against the bottom surface inside the I-shaped slot 108, and most of the stress is transferred to the bottom surface inside the I-shaped slot 108 and then to the upper end surface of the square steel 100, reducing the local maximum stress on the end of the channel steel 102 and weakening the stress concentration effect. It can be seen that the above-mentioned roof steel structure support device in this embodiment can improve the connection strength and stability of the crossbeam (composed of channel steel 102 set back to back) and the column (composed of square steel 100) at the cross intersection, and is easy to disassemble and maintain, with high installation efficiency.

[0037] Combination Figures 5-7 As shown, in some exemplary embodiments, the splicing unit 104 includes a horizontal support plate 112, a first sleeve 106 is vertically fixedly connected to the center position of the lower surface of the support plate 112, the lower surface of the support plate 112 is pressed and fitted with the upper end face of the square steel 100, the I-shaped slot 108 is located above the support plate 112, and the outer lower surface of the channel steel 102 is pressed and fitted with the upper surface of the support plate 112.

[0038] The pallet 112 and the first sleeve 106 are preferably formed by forging or milling to improve the overall structural strength and mechanical properties of the pallet 112 and the first sleeve 106. Of course, welding can also be used to reduce costs. The pallet 112 limits the distance of the first sleeve 106 inserted into the square steel 100 and transmits the vertical compressive stress to the upper end face of the square steel 100. The first sleeve 106 transmits the horizontal force on the splicing unit 104 to the inner side of the square steel 100.

[0039] Combination Figure 8 and Figure 9As shown, in some exemplary embodiments, the splicing unit 104 further includes a grid-shaped frame 114, which is vertically arranged and located above the support plate 112. The grid-shaped frame 114 is detachably connected to the support plate 112. The ends of each group of channel steels 102 are respectively located in the four U-shaped cavities 116 of the grid-shaped frame 114. The I-shaped slot 108 is located inside the U-shaped cavity 116. The end face of the channel steel 102 abuts against the side of the U-shaped cavity 116 that is perpendicular to the channel steel 102. The opening edge of the channel steel 102 abuts against the side wall of the U-shaped cavity 116 that is parallel to the channel steel 102. The through hole 134 on the splicing unit 104 is provided on the side wall of the U-shaped cavity 116 that is parallel to the channel steel 102 and penetrates through the side wall of the U-shaped cavity 116.

[0040] The end of the channel steel 102 is inserted into the U-shaped cavity 116. The U-shaped cavity 116 limits the end of the channel steel 102 and provides horizontal constraint, bearing the horizontal support force. At the same time, it facilitates the guidance and positioning of the end of the channel steel 102 during installation, improving installation efficiency. When the end of the channel steel 102 is inserted into the U-shaped cavity 116 to the maximum depth, the through holes 134 are just aligned. As a prefabricated component, the splicing unit 104 has a small form and position error. The through holes 134 on the channel steel 102 are machined with the end face as the reference surface for positioning.

[0041] In some exemplary embodiments, the splicing unit 104 further includes a second sleeve 118, which is arranged vertically and located above the support plate 112. The lower end of the second sleeve 118 is fixedly connected to the support plate 112. The second sleeve 118 is inserted into the U-shaped cavity 120 of the grid frame 114. The outer side of the second sleeve 118 is in close contact with the inner side of the U-shaped cavity 120. The projection of the outer side of the U-shaped cavity 120 in the vertical direction is located inside the square steel 100.

[0042] The second sleeve 118 positions the grid-shaped frame 114 on one hand, and bears the horizontal force on the grid-shaped frame 114 on the other hand. Then, the horizontal force is transmitted to the first sleeve 106, and then from the first sleeve 106 to the inner surface of the square steel 100.

[0043] In some exemplary embodiments, two sidewalls parallel to the channel steel 102 on the inner side of the U-shaped cavity 116 are respectively provided with C-shaped plates 122. The two C-shaped plates 122 in the same U-shaped cavity 116 are arranged back to back and spaced apart. The I-shaped slot 108 is surrounded by the upper surface of the support plate 112, the inner side of the U-shaped cavity 116, and the outer side of the C-shaped plate 122. The inner side of the channel steel 102 is in close contact with the outer side of the C-shaped plate 122. The through holes 134 on the splicing unit 104 are respectively provided on the sidewall parallel to the channel steel 102 on the inner side of the U-shaped cavity 116 and on the sidewall of the C-shaped plate 122. The end of the bolt 110 is located in the L-shaped cavity 124 of the grid frame 114.

[0044] The C-shaped plate 122 is fixedly connected to the inner side of the U-shaped cavity 116 by welding (preferably by integral milling, but milling is more expensive). The C-shaped plate 122 can better transmit the vertical and horizontal forces on the channel steel 102 to the grid frame 114 and the support plate 112, thereby concentrating the forces on the upper and inner surfaces of the square steel 100 and improving the positioning accuracy of the end of the channel steel 102.

[0045] In some exemplary embodiments, the top surface of the grid frame 114 is on the same plane as the top surface of the channel steel 102, or the top surface of the grid frame 114 is lower than the top surface of the channel steel 102.

[0046] When the roof is pressed on the channel steel 102, it will not cause excessive compression to the top surface of the grid frame 114 (the pressure will be evenly distributed to the top surface of the channel steel 102), thus avoiding excessive pressure on the roof in the top area of ​​the grid frame 114 and improving the support stability of the roof.

[0047] In some exemplary embodiments, the splicing unit 104 further includes a third sleeve 126 fixedly connected to the lower surface of the tray 112. The third sleeve 126 is arranged around the first sleeve 106, and the inner side of the third sleeve 126 is spaced apart from the outer side of the first sleeve 106. The upper end of the square steel 100 is inserted into the space between the third sleeve 126 and the first sleeve 106, and the outer side of the square steel 100 is in close contact with the inner side of the third sleeve 126.

[0048] The third sleeve 126 and the first sleeve 106 sandwich the upper end of the square steel 100 in the middle, which can better transmit the horizontal force to the square steel 100 (the horizontal force is transmitted to the inner and outer surfaces of the upper end of the square steel 100 at the same time, increasing the stress area of ​​the square steel 100 and reducing the maximum local pressure and maximum local stress). It can also prevent the upper end of the square steel 100 from deforming due to excessive horizontal force (reducing the stress concentration in the horizontal direction at the upper end of the square steel 100).

[0049] In some exemplary embodiments, the splicing unit 104 further includes a stiffener 128, which is vertically arranged and located directly below the center of the I-shaped slot 108 and outside the third sleeve 126. The stiffener 128 is a right-angled triangle, with one right-angled side of the stiffener 128 fixedly connected to the lower surface of the support plate 112 and the other right-angled side of the stiffener 128 fixedly connected to the outer side of the third sleeve 126.

[0050] When the channel plate bends and deforms, the support plate 112 (which is equivalent to a cantilever structure at the upper end of the square steel 100) will be subjected to a large bending moment force. The stiffening plate 128 can support the support plate 112 and transfer the force to the third sleeve 126, which in turn transfers the force to the square steel 100, thereby improving the support strength of the support plate 112 and improving the support stability of the roof steel structure support device.

[0051] In some exemplary embodiments, the thickness of the pallet 112 and the wall thickness of the first sleeve 106 are both greater than the wall thickness of the second sleeve 118, and the wall thickness of the second sleeve 118 is equal to the wall thickness of the grid frame 114.

[0052] In some exemplary embodiments, an L-shaped pressure plate 130 is fixedly connected to the bottom of the L-shaped cavity 124. The lower surface of the L-shaped pressure plate 130 is pressed and fitted with the upper surface of the support plate 112. The support plate 112 and each of the four corners corresponding to the L-shaped cavity 124 are provided with L-shaped notches 132. The inner side of the L-shaped notch 132 is aligned with the inner side of the L-shaped pressure plate 130 in the vertical direction.

[0053] Since the bolts 110 fasten the channel steel 102 and the grid frame 114 together, the channel steel 102 will transfer some of the downward force to the grid frame 114. The grid frame 114 then transfers the force to the support plate 112 through the lower surface of the grid frame 114 and the lower surface of the L-shaped pressure plate 130. The L-shaped pressure plate 130 increases the contact area between the grid frame 114 and the support plate 112, thereby reducing the maximum local pressure on the grid frame 114 and improving the deformation resistance of the grid frame 114.

[0054] Preferably, the center of the support plate 112 is opened vertically, so that the inner side of the second sleeve 118 is aligned with the inner side of the first sleeve 106 in the vertical direction and connected together. The splicing unit 104 is composed of plate structure and tube structure, which reduces the overall weight and material cost while ensuring structural strength and mechanical performance.

[0055] It should be noted that "up, down, left, right, front, and back" in the description of this application refer to the view directions in the accompanying drawings, such as... Figure 1The arrows indicating the direction are shown in the middle.

[0056] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A roof steel structure support device comprising vertical square steel (100) and four groups of horizontal channel steel (102), characterized in that, Also include splicing unit (104), the number of each group of the channel steel (102) is two, the back of the two channel steels (102) in each group is arranged close to, the opening of the channel steel (102) is arranged to the horizontal direction, the end of the four groups of channel steels (102) is connected with the square steel (100) through the splicing unit (104), and the four groups of channel steels (102) are arranged in cross shape; The splicing unit (104) is located directly above the square steel (100), the lower surface of the splicing unit (104) has a first sleeve (106), the first sleeve (106) is inserted into the inner end of the square steel (100), the outer side surface of the first sleeve (106) is in close contact with the inner side surface of the square steel (100), and the lower surface of the splicing unit (104) is in close contact with the upper end surface of the square steel (100); The splicing unit (104) has four side surfaces of front side, back side, left side and right side, the four side surfaces of the splicing unit (104) are respectively provided with I-shaped insertion grooves (108), the ends of the two channel steels (102) in each group are spliced into I shape and inserted into the I-shaped insertion grooves (108); The end of the channel steel (102) and the splicing unit (104) are provided with a through hole (134) with a horizontal center axis and perpendicular to the channel steel (102), the center axis of the through hole (134) penetrates the I-shaped insertion groove (108), a bolt (110) is inserted into the through hole (134), and the channel steel (102) and the splicing unit (104) are tightly connected through the bolt (110); The two channel steels (102) in each group are symmetrically arranged with the central plane between the two parallel and opposite outer side surfaces of the square steel (100) as the symmetry plane; The splicing unit (104) comprises a horizontal supporting plate (112), the first sleeve (106) is fixedly connected to the center position of the lower surface of the supporting plate (112) in a vertical mode, the lower surface of the supporting plate (112) is in close contact with the upper end surface of the square steel (100), the I-shaped insertion groove (108) is located above the supporting plate (112), and the outer lower surface of the channel steel (102) is in close contact with the upper surface of the supporting plate (112); The splicing unit (104) further comprises a cross-shaped frame (114), the cross-shaped frame (114) is vertically arranged, the cross-shaped frame (114) is located above the supporting plate (112), the cross-shaped frame (114) is detachably connected with the supporting plate (112), the ends of the channel steels (102) in each group are located in four U-shaped cavities (116) of the cross-shaped frame (114) respectively, and the I-shaped insertion groove (108) is located in the U-shaped cavity (116). The splicing unit (104) further comprises a second sleeve (118) arranged in a vertical direction, the second sleeve (118) is located above the supporting plate (112), the lower end of the second sleeve (118) is fixedly connected with the supporting plate (112), and the second sleeve (118) is inserted into the L-shaped cavity (120) of the well-shaped frame (114). Two side walls in the U-shaped cavity (116) which are parallel to the channel steel (102) are respectively provided with a Z-shaped plate (122), the two Z-shaped plates (122) in the same U-shaped cavity (116) are oppositely arranged and spaced apart, and the I-shaped slot (108) is formed by the upper surface of the supporting plate (112), the inner side surface of the U-shaped cavity (116) and the outer side surface of the Z-shaped plate (122).

2. The roofing steel structural support apparatus according to claim 1, wherein, The end surface of the channel steel (102) abuts against the side wall of the U-shaped cavity (116) which is perpendicular to the channel steel (102), the opening edge of the channel steel (102) abuts against the side wall of the U-shaped cavity (116) which is parallel to the channel steel (102), and the through hole (134) on the splicing unit (104) is arranged on the side wall of the U-shaped cavity (116) which is parallel to the channel steel (102) and penetrates the side wall of the U-shaped cavity (116).

3. The roofing steel structural support apparatus according to claim 2, wherein, The outer side surface of the second sleeve (118) is in close contact with the inner side surface of the L-shaped cavity (120), and the projection of the outer side surface of the L-shaped cavity (120) in the vertical direction is located on the inner side of the square steel (100).

4. The roofing steel structural support apparatus according to claim 2, wherein, The inner side surface of the channel steel (102) is in close contact with the outer side surface of the Z-shaped plate (122), the through hole (134) on the splicing unit (104) is arranged on the side wall of the U-shaped cavity (116) which is parallel to the channel steel (102) and the side wall of the Z-shaped plate (122), respectively, and the end of the bolt (110) is located in the L-shaped cavity (124) of the well-shaped frame (114).

5. The roofing steel structural support apparatus according to claim 2, wherein, The top surface of the well-shaped frame (114) is located on the same plane as the top surface of the channel steel (102), or the top surface of the well-shaped frame (114) is lower than the top surface of the channel steel (102).

6. The roofing steel structural support apparatus according to claim 1, wherein, The splicing unit (104) further comprises a third sleeve (126) fixedly connected to the lower surface of the supporting plate (112), the third sleeve (126) surrounds the first sleeve (106), the inner side surface of the third sleeve (126) is spaced apart from the outer side surface of the first sleeve (106), the upper end of the square steel (100) is inserted into the spacing space between the third sleeve (126) and the first sleeve (106), and the outer side surface of the square steel (100) is in close contact with the inner side surface of the third sleeve (126).

7. The roofing steel structural support apparatus according to claim 6, wherein, The splicing unit (104) further comprises a web plate (128) vertically arranged, which is located directly below the center of the I-shaped slot (108) and outside the third sleeve (126), the shape of the web plate (128) is a right triangle, one right angle side of the web plate (128) is fixedly connected with the lower surface of the supporting plate (112), and the other right angle side of the web plate (128) is fixedly connected with the outer side surface of the third sleeve (126).

8. The roofing steel structural support apparatus according to claim 3, wherein, The thickness of the supporting plate (112) and the wall thickness of the first sleeve (106) are greater than the wall thickness of the second sleeve (118), and the wall thickness of the second sleeve (118) is equal to the wall thickness of the cross-shaped frame (114).

9. The roofing steel structural support apparatus according to claim 4, wherein, The bottom of the L-shaped cavity (124) is fixedly connected with an L-shaped pressing plate (130), the lower surface of the L-shaped pressing plate (130) is tightly matched with the upper surface of the supporting plate (112), the supporting plate (112) is provided with an L-shaped notch (132) at each of the four corners corresponding to the L-shaped cavity (124), and the inner side surface of the L-shaped notch (132) is aligned with the inner side surface of the L-shaped pressing plate (130) in the vertical direction.

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