Steel structure engineering protection support convenient to assemble and disassemble

Abstract

The application provides a novel steel structure engineering protective support convenient to assemble and disassemble, and relates to the technical field of protective supports.The novel steel structure engineering protective support comprises a main connecting piece;an inner movable clamping sleeve of the mounting piece;the inner clamping hexagonal end of a bolt;the rotating assembly comprises a ratchet wheel and a rotating shaft, the ratchet wheel is coaxially connected with the rotating shaft, a bevel gear is fixedly arranged outside the rotating shaft, and the rotating shaft is fixedly connected with the sleeve;the screwing structure comprises a push plate, the push plate is fixedly connected with the ratchet wheel, the ratchet pawl is moved to be engaged with the ratchet wheel after the elastic rod is pressed, the ratchet pawl is rotated by pulling the pull rod, the ratchet pawl drives the ratchet wheel to rotate, the ratchet wheel drives the bevel gear to rotate through the rotating shaft, the bevel gear drives the sleeve to rotate through the transmission shaft, thereby the synchronous rotation of three sleeves is realized, the bolt can be fastened, the bolt fastening on the auxiliary connecting piece is completed in the same way, the mounting piece is placed reversely, the bolt can be disassembled, the novel steel structure engineering protective support is convenient to assemble and disassemble, and the problem that the protective support is inconvenient to assemble and disassemble is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protective scaffolding, in particular to a novel steel structure engineering protective scaffolding convenient to assemble and disassemble. BACKGROUND

[0002] The protective scaffolding is a construction auxiliary tool set up on the building for facilitating the construction and having the protection effect, which is usually built by using steel structure pipes to meet the construction of the outer wall or higher position of the building.

[0003] However, the conventional engineering protective scaffolding needs to be fixed and connected by using the bolt assembly when building the protective scaffolding, and each bolt needs to be fastened separately, which consumes a long time and is inconvenient for assembling and disassembling the protective scaffolding. When the protective scaffolding is fastened and built by using the bolt assembly, the number of the bolt assembly needed is large and the size of the parts is small, which is easy to fall off or be lost, increasing the difficulty of assembly. For the support of the cross rod, it is difficult to ensure the pressure bearing capacity of the cross rod by using only the longitudinal rod, and the stress of the cross rod is larger when falling, which is difficult to reinforce the stress of the cross rod by using the inclined strutting rod. Since the longitudinal rod bears more stress, the cross rod is not suitable for being used as the longitudinal rod, and it is difficult to distinguish the longitudinal rod and the cross rod when assembling. SUMMARY

[0004] Therefore, the present application provides a novel steel structure engineering protective scaffolding convenient to assemble and disassemble, which has a mounting piece to enable the bolts on the connecting piece to be rotated synchronously, facilitating the assembly and disassembly of the protective scaffolding.

[0005] The present application provides a novel steel structure engineering protective scaffolding convenient to assemble and disassemble, which specifically comprises a main connecting piece, a rotating assembly and a reinforcing assembly. The inside of the main connecting piece is inserted with a cross rod and a longitudinal rod, and the inside of the main connecting piece is fixedly connected by a bolt assembly. The outer end of the bolt assembly is connected with a mounting piece. The inside of the mounting piece is movably connected with a screwing structure, and the inside of the mounting piece is movably connected with a sleeve. The inside of the sleeve is connected with the hexagonal end of the bolt. The rotating assembly comprises a ratchet wheel and a rotating shaft. The ratchet wheel is coaxially connected with the rotating shaft. The rotating shaft is externally fixedly provided with a bevel gear, and the rotating shaft is fixedly connected with the sleeve. The screwing structure comprises a push plate, which is fixedly connected with the ratchet wheel. The end of the longitudinal rod is fixedly inserted with an auxiliary connecting piece. The inside of the auxiliary connecting piece is fixedly inserted with an inclined strutting rod. The reinforcing assembly comprises a clamping pipe and a sleeve pipe. The inside of the clamping pipe is movably connected with the inclined strutting rod, and the inside of the sleeve pipe is movably connected with the cross rod.

[0006] Optionally, the main connector is composed of a first clamping block, a second clamping block and a third clamping block, the inner part of the first clamping block and the second clamping block is respectively provided with a collecting groove, when the first clamping block and the second clamping block are spliced, a longitudinal circular groove is formed in the middle, when the first clamping block and the third clamping block are spliced, a transverse circular groove is formed in the middle, the upper aperture of the collecting groove is larger than the lower aperture, and the upper aperture of the collecting groove is larger than the maximum diameter of the bolt, the lower aperture of the collecting groove is smaller than the maximum diameter of the bolt.

[0007] Optionally, the mounting member is provided with a sliding groove and a clamping groove, the sliding groove is arranged inside the arc-shaped outer convex part of the mounting member, the clamping groove is arranged beside the sliding groove in a transverse structure, and the distance between the clamping sleeves is equal to the spacing of the bolt assemblies on the main connector.

[0008] Optionally, the screwing structure further comprises a pull rod, a ratchet pawl and an elastic rod, the pull rod is slidingly connected in the sliding groove, the pull rod is movably connected with the ratchet pawl through a shaft, and the pull rod is fixedly connected with the elastic rod, and the end of the elastic rod is fixedly connected with the push plate through a rod.

[0009] Optionally, the rotating assembly further comprises a transmission shaft and a large bevel gear, the transmission shaft is in a longitudinal structure and is provided with two groups, each group of transmission shafts is provided with a small bevel gear at both ends, the small bevel gear at one end of the transmission shaft is engaged with the bevel gear on the rotating shaft, and the small bevel gear at the other end is engaged with the large bevel gear, the large bevel gear is fixedly connected with the clamping sleeve, and the large bevel gear and the clamping sleeve are movably connected in the mounting member.

[0010] Optionally, the reinforcing assembly further comprises a supporting plate, the supporting plate is in a one-half cylindrical structure, the top surface of the supporting plate is fixedly connected with a sleeve, the supporting plate is fixedly connected with a horizontal rod through the sleeve by means of a bolt assembly, and the spacing of the bolt assemblies on the supporting plate is equal to the distance between the clamping sleeves.

[0011] Optionally, the clamping pipe is provided with a groove and a supporting rod, the groove is in a longitudinal structure and is clamped on the outer wall of the vertical rod, and the supporting rod is fixedly welded on the clamping pipe, and the top end of the supporting rod is fixedly connected to the bottom surface of the supporting plate.

[0012] Optionally, the vertical rod is provided with a clamping ring and a threaded pipe, the clamping ring is fixedly welded on the outer wall of the vertical rod, and the threaded pipe is fixedly connected on the outer wall of the vertical rod by means of thread engagement.

[0013] Optionally, the auxiliary connector comprises a fourth clamping block, a fifth clamping block and a sixth clamping block, the fourth clamping block and the fifth clamping block are fixedly connected by means of a bolt assembly, the inner part of the fourth clamping block and the fifth clamping block forms a communication inclined groove after being closed, the inclined supporting rod is inserted into the inclined groove, the fifth clamping block and the sixth clamping block and the fourth clamping block and the sixth clamping block are fixedly connected by means of a bolt assembly, and the spacing of the bolt assemblies on the auxiliary connector is equal to the spacing of the clamping sleeves.

[0014] Advantages

[0015] 1. The present application compared with the traditional protective support, the sleeve is connected on the bolt of the main connecting piece, when the elastic rod is pressed, the elastic rod is compressed and the end of the elastic rod slides in the slot, the pawl is also moved, so that the pawl can engage with the ratchet, at this time, the pull rod is pulled to slide in the slot, the pull rod drives the pawl to rotate, the pawl drives the ratchet to rotate, when the pull rod is pulled back, the pawl does not engage with the ratchet to rotate, the one-way rotation of the ratchet is realized, when the ratchet rotates, the bevel gear is driven to rotate through the shaft, the two groups of transmission shafts are driven to rotate through the engagement of the bevel gear, the sleeve is driven to rotate through the engagement of the small bevel gear and the large bevel gear, so that the synchronous rotation of the three groups of sleeves is realized, so that the bolt can be tightened, and the bolt on the auxiliary connecting piece can be tightened in the same way, and the bolt can be disassembled by placing the installation piece in the opposite direction, which is convenient for assembly or disassembly.

[0016] 2. The main connecting piece is used to vertically connect and assemble the vertical rod and the horizontal rod, the auxiliary connecting piece is used to fixedly connect the diagonal support rod and the vertical rod, and compared with the traditional connection mode, the mode is simpler, the connection distance can be adjusted according to the needs of the site, and the bolts can be collected in the collecting groove to avoid falling or losing the bolts during disassembly, which is convenient to use.

[0017] 3. When the sleeve is connected on the diagonal support rod, the groove is used to connect on the vertical rod to position the vertical rod, and the support rod is used to position the position of the supporting plate, so that the installation position of the sleeve is fixed, the position of the horizontal rod is preliminarily fixed, and after the bolt assembly penetrates the sleeve and the horizontal rod, the installation piece is used to tighten the bolt, so that the fixed connection between the supporting plate, the sleeve and the horizontal rod is completed, which is convenient for assembly and disassembly, the support rod can reinforce the horizontal rod and the diagonal support rod to increase the support points of the horizontal rod, realize uniform dispersion of force, avoid deformation or tripping of the horizontal rod or the vertical rod caused by excessive local force, and ensure safety.

[0018] 4. The main connecting piece or the auxiliary connecting piece can increase the stress bearing area on the bottom surface by using the clamping ring, so as to improve the stability of the assembled protective support. Since the vertical force on the rod is larger, the vertical rod is not suitable for being changed to a horizontal rod after being determined for vertical force. The threaded tube can improve the stress of the clamping ring and can also determine the connection point of the vertical rod, horizontal rod or diagonal support rod, so as to distinguish the vertical rod, horizontal rod or diagonal support rod and avoid using the wrong rod during assembly. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings in the following description only relate to some embodiments of the present application, but are not limited to the present application.

[0021] In the drawings:

[0022] Figure 1 A perspective view of the application in use is shown;

[0023] Figure 2 A perspective view of the application is shown;

[0024] Figure 3 A perspective view of Figure 2 A perspective view of the guard bracket shown from another angle;

[0025] Figure 4 A perspective view of Figure 2 An exploded view of the secondary connector in the guard bracket shown;

[0026] Figure 5 A perspective view of Figure 2 A perspective view of the primary connector and mounting member in the guard bracket shown in use;

[0027] Figure 6 A perspective view of Figure 5 An exploded view of the primary connector in the guard bracket shown;

[0028] Figure 7 A perspective view of Figure 2 A perspective view of the mounting member in the guard bracket shown in use;

[0029] Figure 8 A perspective view of Figure 7 An exploded view of the mounting member shown after removal of the bolts;

[0030] Figure 9 A perspective view of Figure 8 A perspective view of the mounting member shown after removal of the parts;

[0031] Figure 10 A perspective view of Figure 9 A perspective view of the mounting member shown after removal of the parts;

[0032] Figure 11 A perspective view of Figure 8 An enlarged view of A in the figure;

[0033] Figure 12 A perspective view of Figure 9 An enlarged view of B in the figure.

[0034] List of reference signs

[0035] 1, main connecting piece; 11, first clamping block; 12, second clamping block; 13, third clamping block; 101, collecting groove; 2, mounting piece; 201, sliding groove; 202, clamping groove; 203, clamping sleeve; 3, screwing structure; 31, pull rod; 32, pawl; 33, elastic rod; 34, push plate; 4, rotating assembly; 41, ratchet wheel; 42, rotating shaft; 43, transmission shaft; 44, large bevel gear; 51, clamping pipe; 5101, groove; 5102, support rod; 52, supporting plate; 53, sleeve; 6, longitudinal rod; 601, clamping ring; 602, threaded pipe; 7, cross rod; 8, inclined strut; 91, fourth clamping block; 92, fifth clamping block; 93, sixth clamping block. DETAILED DESCRIPTION

[0036] In order to make the purpose, scheme and advantages of the technical scheme of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings of specific embodiments of the present application. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0037] Embodiment: Please refer to Figures 1 to 12 :

[0038] The present application provides a novel steel structure engineering protection support convenient to assemble and disassemble, which comprises a main connecting piece 1, a rotating assembly 4 and a reinforcing assembly. The inside of the main connecting piece 1 is inserted with a cross rod 7 and a longitudinal rod 6, and the inside of the main connecting piece 1 is fixedly connected through a bolt assembly, and the outer end of the bolt assembly is connected with a mounting piece 2. The inside of the mounting piece 2 is movably connected with a screwing structure 3, and the inside of the mounting piece 2 is movably connected with a clamping sleeve 203, and the inside of the clamping sleeve 203 is connected with the hexagonal end of the bolt. The rotating assembly 4 comprises a ratchet wheel 41 and a rotating shaft 42, the ratchet wheel 41 is coaxially connected with the rotating shaft 42, the rotating shaft 42 is externally fixedly provided with a bevel gear, and the rotating shaft 42 is fixedly connected with the clamping sleeve 203. The screwing structure 3 comprises a push plate 34, and the push plate 34 is fixedly connected with the ratchet wheel 41. The end of the longitudinal rod 6 is fixedly inserted with an auxiliary connecting piece. The inside of the auxiliary connecting piece is fixedly inserted with an inclined strut 8. The reinforcing assembly comprises a clamping pipe 51 and a sleeve 53, the inside of the clamping pipe 51 is movably connected with the inclined strut 8, and the inside of the sleeve 53 is movably connected with the cross rod 7.

[0039] In addition, as shown in the accompanying Figure 5 and the accompanying Figure 6As shown, the main connecting piece 1 is composed of the first clamping block 11, the second clamping block 12 and the third clamping block 13, the inner part of the first clamping block 11 and the second clamping block 12 is respectively provided with a collecting groove 101, when the first clamping block 11 and the second clamping block 12 are spliced, a longitudinal circular groove is formed in the middle, when the first clamping block 11 and the third clamping block 13 are spliced, a transverse circular groove is formed in the middle, the upper aperture of the collecting groove 101 is larger than the lower aperture, and the upper aperture of the collecting groove 101 is larger than the maximum diameter of the bolt, the lower aperture of the collecting groove 101 is smaller than the maximum diameter of the bolt, but larger than the diameter of the shank of the bolt, the first clamping block 11, the second clamping block 12 and the third clamping block 13 are matched, so that the longitudinal rod 6 and the transverse rod 7 can be vertically connected and assembled, and the bolts can be collected by the collecting groove 101, so as to avoid the bolts from falling or being lost during disassembly, and facilitate use.

[0040] In addition, as shown in the accompanying Figure 10 and the accompanying Figure 11 , the mounting piece 2 is provided with a sliding groove 201 and a clamping groove 202, the sliding groove 201 is arranged inside the arc-shaped outer convex part of the mounting piece 2, the clamping groove 202 is arranged beside the sliding groove 201 and has a transverse structure, the distance between the clamping sleeves 203 is equal to the spacing of the bolt assemblies on the main connecting piece 1, when the clamping sleeves 203 are rotated, the bolts between the first clamping block 11 and the second clamping block 12 are rotated, so as to realize the synchronous rotation of the three groups of bolts and complete the disassembly of the three groups of bolts, when the mounting piece 2 is used for the bolt installation between the first clamping block 11 and the third clamping block 13 or between the second clamping block 12 and the third clamping block 13, the two outermost groups of clamping sleeves 203 can drive the two groups of bolts to rotate synchronously and complete the disassembly of the two groups of bolts, so as to improve the efficiency.

[0041] In addition, as shown in the accompanying Figure 1 and the accompanying Figure 3 , the screw structure 3 further includes a pull rod 31, a pawl 32 and an elastic rod 33, the pull rod 31 is slidingly connected in the sliding groove 201, the pull rod 31 is movably connected with the pawl 32 through a shaft, the elastic rod 33 is fixedly connected on the pull rod 31, the end of the elastic rod 33 is fixedly connected with a push plate 34 through a rod, when the elastic rod 33 is pressed, the elastic rod 33 is compressed and the rod at the end of the elastic rod 33 slides in the clamping groove 202, so as to drive the pawl 32 to move, so that the pawl 32 can engage with the ratchet wheel 41, at this time, the pull rod 31 is pulled to slide in the sliding groove 201, the pull rod 31 drives the pawl 32 to rotate, the pawl 32 drives the ratchet wheel 41 to rotate, when the pull rod 31 is pulled back, the pawl 32 does not rotate with the ratchet wheel 41, so as to realize the one-way rotation of the ratchet wheel 41, so that the bolt can be tightened and the assembly is completed.

[0042] In addition, as shown in the accompanying Figure 10 and the accompanying Figure 12As shown, the rotating assembly 4 further comprises a transmission shaft 43 and a large bevel gear 44. The transmission shaft 43 is longitudinally structured and provided with two groups. Each group of the transmission shaft 43 is provided with small bevel gears at both ends. The small bevel gear at one end of the transmission shaft 43 is engaged with the bevel gear on the rotating shaft 42. The small bevel gear at the other end is engaged with the large bevel gear 44. The large bevel gear 44 is fixedly connected with the sleeve 203. The large bevel gear 44 is movably connected with the sleeve 203 inside the mounting member 2. When the ratchet wheel 41 rotates, the rotating shaft 42 drives the bevel gear to rotate. The bevel gear drives the two groups of transmission shafts 43 to rotate through engagement. The transmission shaft 43 drives the sleeve 203 to rotate through the engagement of the small bevel gear and the large bevel gear 44. Thus, the synchronous rotation of the three groups of sleeves 203 is realized. The rotation of the bolt is realized. The assembly of the main connecting member 1 or the auxiliary connecting member is facilitated.

[0043] In addition, as shown in the accompanying drawings Figure 2 and the accompanying drawings Figure 3 As shown, the reinforcing assembly further comprises a supporting plate 52. The supporting plate 52 is in a half-cylinder structure. The top surface of the supporting plate 52 is fixedly connected with a sleeve pipe 53. The supporting plate 52 is fixedly connected with the cross rod 7 through the bolt assembly penetrating the sleeve pipe 53. The distance between the bolt assemblies on the supporting plate 52 is equal to the distance between the sleeves 203. The sleeve pipe 51 is provided with a groove 5101 and a supporting rod 5102. The groove 5101 is longitudinally structured and is clamped on the outer wall of the vertical rod 6. The supporting rod 5102 is fixedly welded on the sleeve pipe 51. The top end of the supporting rod 5102 is fixedly connected with the bottom surface of the supporting plate 52. When the sleeve pipe 51 is sleeved on the inclined support rod 8, the vertical rod 6 can be positioned by clamping the groove 5101 on the vertical rod 6. The position of the supporting plate 52 is positioned by the supporting rod 5102. Thus, the installation position of the sleeve pipe 53 is fixed. The position of the cross rod 7 is preliminarily fixed. After the bolt assembly penetrates the sleeve pipe 53 and the cross rod 7, the bolt is fastened by the mounting member 2. Thus, the fixed connection between the supporting plate 52, the sleeve pipe 53 and the cross rod 7 is completed. The assembly and disassembly are facilitated. The supporting rod 5102 can reinforce the cross rod 7 and the inclined support rod 8. The supporting point of the cross rod 7 is increased. The uniform dispersion of force is realized. The deformation or tripping of the cross rod 7 or the vertical rod 6 caused by excessive local force is avoided. The safety is ensured.

[0044] In addition, as shown in the accompanying drawings Figure 3 The vertical rod 6 is provided with a clamping ring 601 and a threaded pipe 602. The clamping ring 601 is fixedly welded on the outer wall of the vertical rod 6. The threaded pipe 602 is fixedly connected with the outer wall of the vertical rod 6 through thread engagement. The main connecting member 1 or the auxiliary connecting member can increase the force bearing area on the bottom surface by the clamping ring 601. The stability of the protective support after assembly is improved. Since the longitudinal force of the rod is larger, the vertical rod 6 is not suitable for being changed into a horizontal rod after being determined for longitudinal force. The force of the clamping ring 601 can be improved by the threaded pipe 602. The connection points of the vertical rod 6, the cross rod 7 or the inclined support rod 8 can be determined. The vertical rod 6, the cross rod 7 or the inclined support rod 8 are distinguished. The wrong rod during assembly is avoided.

[0045] In addition, as attached Figure 4 As shown, the auxiliary connector includes a fourth locking block 91, a fifth locking block 92, and a sixth locking block 93. The fourth locking block 91 and the fifth locking block 92 are fixedly connected by bolt assemblies. After the fourth locking block 91 and the fifth locking block 92 are closed, they form a connected inclined groove. The inclined brace 8 is inserted into the inclined groove. The fifth locking block 92 and the sixth locking block 93, as well as the fourth locking block 91 and the sixth locking block 93, are all fixedly connected by bolt assemblies. The spacing of the bolt assemblies on the auxiliary connector is equal to the spacing of the sleeve 203. The auxiliary connector allows the inclined brace 8 to be fixedly connected to the longitudinal rod 6. The bolts on the auxiliary connector can be simultaneously fixedly connected by the mounting part 2, and the disassembly or assembly of the three sets of bolts can be completed at the same time, improving work efficiency.

[0046] The specific usage and function of this embodiment: In this invention, the position of the longitudinal rod 6 is determined according to the position of the protective support to be built at the construction site. The lower horizontal rod 7 is fixedly connected to the longitudinal rod 6 using the main connector 1. The bolts inside the collection trough 101 are taken out and assembled through the holes on the main connector 1. The longitudinal rod 6 and the diagonal brace 8 are assembled using the auxiliary connector.

[0047] The sleeve 203 is snapped onto the bolt on the main connector 1. When the elastic rod 33 is pressed, the elastic rod 33 is compressed and the rod at the end of the elastic rod 33 slides inside the slot 202, which also pushes the pawl 32 to move, so that the pawl 32 can engage with the ratchet 41. At this time, the pull rod 31 is pulled to slide inside the slide groove 201. The pull rod 31 drives the pawl 32 to rotate, and the pawl 32 pushes the ratchet 41 to rotate. When the pull rod 31 is pulled back, the pawl 32 and the ratchet 41 are not engaged and rotate, realizing the unidirectional rotation of the ratchet 41. After the ratchet 41 rotates, it drives the bevel gear to rotate through the rotating shaft 42. The bevel gear drives the two sets of transmission shafts 43 to rotate through meshing. The transmission shaft 43 drives the sleeve 203 to rotate through the meshing of the small bevel gear and the large bevel gear 44, thereby realizing the synchronous rotation of the three sets of sleeves 203, so that the bolt can be tightened. Similarly, the bolts on the auxiliary connector are tightened, and the assembly is completed.

[0048] After the clamping tube 51 is sleeved on the diagonal brace 8, the groove 5101 is used to clamp onto the longitudinal rod 6, so that the position of the longitudinal rod 6 can be positioned. At the same time, the support rod 5102 is used to position the support plate 52, thereby fixing the installation position of the sleeve 53 and initially fixing the position of the upper crossbar 7. After the support plate 52 and the sleeve 53 are fixedly connected, the support rod 5102 can reinforce the crossbar 7 and the diagonal brace 8, increase the support points of the crossbar 7, achieve uniform force distribution, and avoid excessive local stress on the crossbar 7 or the longitudinal rod 6, which may lead to deformation or disengagement, thus ensuring safety.

[0049] The above descriptions are only some exemplary embodiments of the present application, but not intended to limit the protection scope of the present application, which is defined by the appended claims.

Claims

1. A steel structure engineering protection support convenient to assemble and disassemble, characterized in that, The utility model provides a kind of main connecting piece (1), rotating assembly (4) and reinforcing assembly;The inside of the main connecting piece (1) is inserted with cross bar (7) and longitudinal rod (6), and the inside of main connecting piece (1) is fixedly connected by bolt assembly, the outer end of bolt assembly is connected with mounting piece (2);The inside of the mounting piece (2) is movably connected with screwing structure (3), and mounting piece (2) inside movably connects sleeve (203), the inside of sleeve (203) is connected with the hexagonal end of bolt;The rotating assembly (4) includes ratchet wheel (41) and rotating shaft (42), ratchet wheel (41) coaxially connects rotating shaft (42), rotating shaft (42) is fixedly provided with bevel gear outside, and rotating shaft (42) is fixedly connected with sleeve (203);The screwing structure (3) includes push plate (34), and push plate (34) is fixedly connected with ratchet wheel (41);The end of the longitudinal rod (6) is fixedly inserted with auxiliary connecting piece;The inside of the auxiliary connecting piece is fixedly inserted with inclined strut (8);The reinforcing assembly includes sleeve (51) and sleeve (53), sleeve (51) is movably connected with inclined strut (8) inside, and sleeve (53) is movably connected with cross bar (7) inside; The main connecting piece (1) is composed of first clamping block (11), second clamping block (12) and third clamping block (13), the inside of first clamping block (11) and second clamping block (12) is respectively provided with collection groove (101), when first clamping block (11) and second clamping block (12) are spliced, middle forms longitudinal circular groove, when first clamping block (11) and third clamping block (13) are spliced, middle forms horizontal circular groove, the upper aperture of collection groove (101) is larger than the lower aperture, and the upper aperture of collection groove (101) is larger than the maximum diameter of bolt, the lower aperture of collection groove (101) is smaller than the maximum diameter of bolt; The mounting piece (2) is provided with sliding groove (201) and clamping groove (202), the sliding groove (201) is arranged inside the arc-shaped outer convex portion of mounting piece (2), the clamping groove (202) is horizontally structured and arranged beside the sliding groove (201), and the distance between the sleeves (203) is equal to the spacing of the bolt assemblies on the main connecting piece (1); The screwing structure (3) further includes pull rod (31), pawl (32) and elastic rod (33), the pull rod (31) is slidingly connected inside the sliding groove (201), the pull rod (31) is movably connected with the pawl (32) through a shaft, and the elastic rod (33) is fixedly connected to the pull rod (31), and the end of the elastic rod (33) is fixedly connected with the push plate (34) through a rod; The rotating assembly (4) further includes transmission shaft (43) and large bevel gear (44), the transmission shaft (43) is longitudinally structured and provided with two groups, each transmission shaft (43) is provided with small bevel gears at both ends, the small bevel gear at one end of the transmission shaft (43) is engaged with the bevel gear on the rotating shaft (42), and the small bevel gear at the other end is engaged with the large bevel gear (44), the large bevel gear (44) is fixedly connected with the sleeve (203), and the large bevel gear (44) is movably connected with the sleeve (203) inside the mounting piece (2). The card pipe (51) is provided with a groove (5101) and a supporting rod (5102), the groove (5101) is a longitudinal structure and is clamped on the outer wall of the vertical rod (6), the supporting rod (5102) is fixedly welded on the card pipe (51), and the top end of the supporting rod (5102) is fixedly connected to the bottom surface of the supporting plate (52); The auxiliary connecting piece comprises a fourth clamping block (91), a fifth clamping block (92) and a sixth clamping block (93), the fourth clamping block (91) and the fifth clamping block (92) are fixedly connected through a bolt assembly, the fourth clamping block (91) and the fifth clamping block (92) form a communication inclined groove after being closed, the inclined supporting rod (8) is inserted into the inclined groove, the fifth clamping block (92) and the sixth clamping block (93) and the fourth clamping block (91) and the sixth clamping block (93) are fixedly connected through bolt assemblies, and the spacing of the bolt assemblies on the auxiliary connecting piece is equal to the spacing of the clamping sleeves (203).

2. The steel structure engineering protection support which is convenient to assemble and disassemble according to claim 1, characterized in that: The vertical rod (6) is provided with a clamping ring (601) and a threaded pipe (602), the clamping ring (601) is fixedly welded on the outer wall of the vertical rod (6), and the threaded pipe (602) is fixedly connected on the outer wall of the vertical rod (6) through thread engagement.

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