Modularized combined truss and assembling method thereof

Abstract

The invention discloses a modular combined truss and an assembling method thereof, and relates to the technical field of truss assembling. According to the modular combined truss and the assembling method thereof, the modular combined truss comprises a first truss unit, the first truss unit comprises two first end covers, a first round pipe is arranged between the two first end covers, the side face of the first round pipe is connected with fixing pins, and a first middle frame is arranged between every two adjacent fixing pins; the first truss unit is in sliding connection with the lifting connecting frame, the lifting connecting frame comprises a plurality of frame plates, the frame plates are sequentially connected end to end in the circumferential direction of a virtual circle to form a frame body, a pulley is arranged in the frame body, and the pulley is in sliding connection with the first circular pipe; and the second truss unit is connected with one side of the lifting connecting frame. According to the modular combined truss and the assembling method thereof, modular design is adopted, glass fiber reinforced plastic materials are used as basic materials, the modular combined truss is lifted to a high position in a sliding mode after being assembled and fixed on the ground, cost is reduced, efficiency is improved, and the risk of high-altitude operation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rack assembly, and in particular to a modular combined rack and an assembly method thereof. Background Art

[0002] When carrying out cable transmission and replacement work in the field of high-voltage power transmission and transformation, the cables need to cross roads, railways, bridges and other facilities. In order to prevent the cables from falling accidentally and ensure the insulation safety distance, it is necessary to set up protective bridges on both sides of the area where such facilities are crossed, so that protective nets can be laid on the protective bridges for safety protection and construction work. Such protective bridges are usually characterized by large heights and large spans, and must meet the bearing capacity requirements of relevant operating standards.

[0003] Traditionally, artificial steel pipe scaffolding is widely used as a protective bridge frame. The installation is not only time-consuming and labor-intensive, but also poses a great safety hazard for high-altitude operations. It is also difficult to meet the requirements of the operating standards for the bearing capacity and anti-overturning force of the protective bridge frame. In addition, when the scaffolding is closed, the steel pipe frame is unevenly stressed, and some steel pipes bear the main tensile force, which makes the steel pipes easily deformed or even broken.

[0004] In the known prior art, a new type of modular assembled and spliced ​​lift tower made of metal material is made of aluminum alloy or structural steel profiles and is designed as a modular assembly structure to achieve rapid transportation and rapid erection. Its safety performance is better than that of traditional scaffolding erection methods. FRP has low density and high strength, high component molding efficiency, low overall cost, and basically no recycling value after one-time molding (not easy to be stolen).

[0005] However, the manufacturing cost of metal scaffolding is relatively high. In addition, because metal has recycling value, scaffolding is often stolen during outdoor construction. However, fiberglass cannot be welded, so the component structure and processing technology are very different from metal scaffolding, requiring additional assembly methods. Scaffolding is often erected at high altitudes, which is high risk. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a modular combination rack and its assembly method, which adopts a modular design and uses fiberglass as the basic material. After being assembled and fixed on the ground, it is lifted to a height by sliding, thereby reducing costs, increasing efficiency and reducing the risks of high-altitude operations.

[0007] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: a modular combination rack and its assembly method, comprising: a first rack unit, the first rack unit comprising: two first end covers, a plurality of first circular tubes are arranged between the two first end covers, the two ends of each of the first circular tubes are respectively connected to a corner close to the two first end covers, a plurality of fixing pins are connected to the side of each of the first circular tubes, the plurality of fixing pins on each of the first circular tubes are equidistantly distributed, a first middle frame is arranged between adjacent fixing pins, and one end of the first circular tube passes through the plurality of first middle frames and is plugged into the first end cover.

[0008] A lifting and connecting frame, one end of the first rack unit passes through the lifting and connecting frame and is slidably connected to the lifting and connecting frame, the lifting and connecting frame includes: a plurality of frame plates, the frame plates are arranged on the outside of the first circular tube, the plurality of frame plates are sequentially connected in the circumferential direction of the virtual circle to form a frame body, the inner wall of each corner of the frame body is connected with two side plates, one side plate is connected to an inner wall of a corner of the frame body, and the other side plate is connected to another inner wall of a corner of the frame body, the two side plates are integrally formed and form a V-shaped plate, support plates are arranged at both ends of the V-shaped plate, the two sides of the support plate are respectively connected to the inner walls of the two side plates, each of the support plates is rotatably connected to a pulley through a rod body, and the pulley is slidably connected to the first circular tube.

[0009] The second rack unit is connected to one side of the lifting connection frame, and the second rack unit includes: two second end covers, the second end covers are connected to one side of the lifting connection frame, each corner of the second end cover on the side away from the lifting connection frame is connected to a second round tube, and the side of each second round tube is connected to a plurality of fixing pins, and a second middle frame is arranged between adjacent fixing pins, and one second round tube is connected to another parallel second round tube by a plurality of diagonal braces, and the diagonal braces are used to reinforce the two second round tubes.

[0010] Preferably, the structure of the second end cover is the same as that of the first end cover, the structure of the first circular tube is the same as that of the second circular tube, and the structure of the first middle frame is the same as that of the second middle frame. The first end cover comprises: a plurality of first circular plates, the plurality of first circular plates are equidistantly distributed in the direction of the virtual circle, and first connecting plates are arranged between adjacent first circular plates, and the two ends of the first connecting plates are respectively connected to the side surfaces of adjacent first circular plates. The plurality of first circular plates and the plurality of first connecting plates are integrally formed to form a cover plate, and a through hole is provided in the middle of the cover plate, and the inner edges of the corners of the cover plate are penetrated. A first connecting hole is provided, and a side of each of the first circular plates away from the lifting connection frame is connected to an insert tube, a vertical plate is provided between adjacent insert tubes, both ends of the vertical plate are respectively connected to end plates, and the inner wall of the vertical plate is connected to a plurality of first reinforcement plates, and the sides of the vertical plate, the end plate and the first reinforcement plate close to the lifting connection frame are all connected to the side of the first connection plate away from the lifting connection frame, and an angle plate is provided between adjacent end plates, a second connecting hole is provided through the middle of the angle plate, and both sides of the angle plate are respectively connected to the inner walls of the bottom of the two end plates.

[0011] Preferably, the first middle frame includes: a second circular plate, the second circular plate is arranged on the outside of the first circular tube, a plug hole is penetrated through one side of the second circular plate, the plug hole is slidably connected to the first circular tube, a connecting strip is arranged between adjacent first circular plates, the inner wall of the connecting strip is connected to a plurality of second reinforcement plates, the two ends of the connecting strip are respectively connected to the side surfaces of adjacent first circular plates, and the first reinforcement plate and the second reinforcement plate are both triangular plates.

[0012] Preferably, each of the side panels is penetrated by a plurality of second holes, the outer edge of each side panel is penetrated by two fifth connecting holes, the two second connecting holes are symmetrically distributed on both sides of the axis of the side panel, the upper surface of each support panel is connected to a U-shaped plate through a fixed plate, the rod body is arranged at one end of the U-shaped plate, the U-shaped plate is composed of a transverse plate and plate bodies at both ends of the transverse plate, the two ends of the rod body are connected to the side close to the two plate bodies, the width of the fixed plate is greater than the thickness of the support plate, the outer side of the fixed plate and the outer side of the support plate are located in the same plane, and the cross-sectional view of the pulley is a compound inverted cone.

[0013] Preferably, the distance between the two fixing pins is equal to the thickness of the first middle frame, the diameter of the first middle frame is equal to the outer diameter of the fixing pin, and a pin hole is provided on the outer side of the fixing pin.

[0014] Preferably, the frame plate comprises: a flat plate, which is arranged on the outside of the first circular tube, a groove is opened at the center of the outside of the flat plate, a first channel is opened through the bottom of the groove, a plurality of third connecting holes are opened through the outside of the flat plate, and the plurality of third connecting holes are equidistantly distributed in the circumferential direction of the groove, and the edges of the flat plate are connected to side plates, and the angle between the side plates and the flat plate is an obtuse angle, wherein a plurality of fourth connecting holes are opened through two of the side plates, and the two side plates are symmetrically distributed about the axis of the flat plate, and adjacent frame plates are threadedly connected through the fourth connecting holes.

[0015] Preferably, the diagonal brace is a half structure, and the diagonal brace is composed of two half plates, each of the half plates includes: two semicircular plates, the semicircular plates are arranged on the outside of the second circular tube, the edge of one side of the semicircular plate is connected to a first ear plate, the middle of the first ear plate is penetrated with a sixth connecting hole, the edge of the other side of the semicircular plate is connected to a second connecting plate, the bottom end of the second connecting plate is connected to the other semicircular plate, the edges of both ends of the second connecting plate are connected to second ear plates, the middle of the second ear plate is penetrated with a seventh connecting hole, and the half plates are Z-shaped.

[0016] Preferably, the composite inverted cone is a combined figure formed by combining the narrower bottom surfaces of two inverted cones, wherein the inverted cone is a shape with a wider bottom surface and gradually narrows upward, the arc surface of the pulley is adapted to the arc surface of the fixing pin, the first end cover, the second end cover, the first middle frame, the second middle frame, and the diagonal support plate are all molded glass fiber reinforced plastic structures, and the first round tube and the second round tube are both formed by a drawing, weaving and pultrusion process.

[0017] An assembly method includes: a plurality of the first rack units are stacked and combined into a first rack, a plurality of the second rack units are stacked and combined into a second rack, the two ends of the second rack are respectively connected to the adjacent sides of the two lifting connection frames, each of the lifting connection frames is slidably connected to a first rack, and the combined rack consists of two first racks, a second rack, and a lifting connection frame.

[0018] Beneficial effects: The present invention provides a modular combined rack and its assembly method. Compared with the prior art, the present invention has the following beneficial effects: 1. The lifting connection frame is connected to the second rack as a whole, and the two first racks are used as basic support points to realize the function of sliding the lifting connection frame and the second rack along the axis direction of the first rack, so that the second rack can be assembled on the ground and then slid into the air, solving the problem that most racks are erected at high altitudes and have high risks.

[0019] 2. Most of the overall components are made of fiberglass and adopt modular structure design, which reduces production and transportation costs, is easy to install, and avoids theft. Only threaded connections are used, and the installation method is simple and efficient.

[0020] 3. The first frame unit is mainly composed of end covers, middle frames, round tubes and fixing pins. The end covers and middle frames are molded glass fiber reinforced plastic structures. The round tubes are formed by drawing, weaving and pultrusion, which greatly increases the circumferential tensile strength. The second frame unit with diagonal braces adds diagonal brace tubes (molded, half structure) on the basis of the first frame unit to increase the bearing and bending resistance of large-span crossarms.

[0021] 4. The adjacent first rack units are screwed through the first connection hole and the second connection hole, and the four corners of the adjacent first rack units are fixed. The first rack can be obtained by stacking and fastening several first rack units, simplifying the connection process. The connection method of the first rack is a modular tower, which allows high-altitude construction workers to fasten safety belts and achieve multi-level protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 This is a separation diagram of the first row rack and the lifting connection frame.

[0026] Figure 3 This is a schematic diagram of the structure of the first row of racks.

[0027] Figure 4 It is a structural schematic diagram of splitting the first row rack into a plurality of first row rack units.

[0028] Figure 5 It is a schematic diagram of the structure of the first rack unit.

[0029] Figure 6 This is the exploded view of the first row of shelf units.

[0030] Figure 7 Exploded view of the end cap.

[0031] Figure 8 This is a schematic diagram of the structure after the first circular plate, the first connecting plate and the insert cylinder are removed from the end cover.

[0032] Fig. 9 A schematic diagram of the structure of the middle frame.

[0033] Fig.10 It is a schematic diagram of the structure of the first circular tube and the fixing pin.

[0034] Fig.11 It is a schematic diagram of the structure of the fixing pin.

[0035] Fig.12 It is a structural schematic diagram of the connection parts of the first rack unit and the lifting connection frame.

[0036] Fig.13 It is a structural schematic diagram of the lifting connection frame and the second end cover.

[0037] Fig.14 for Fig.13 Separation diagram of the middle frame plate and the second end cover.

[0038] Fig.15 Schematic diagram of the structure of the frame plate.

[0039] Fig.16 It is a schematic diagram of the structure of the side plate, support plate, U-shaped plate, pulley, and the first circular tube.

[0040] Fig.17 for Fig.16 Exploded diagram.

[0041] Fig.18 It is a structural schematic diagram of the lifting connection frame and the second row frame.

[0042] Fig.19 It is a schematic structural diagram of part of the second rack unit in the second rack.

[0043] Fig. 20 This is an exploded view of the diagonal brace.

[0044] The reference numerals in the figure are: 1, first rack unit; 11, first end cover; 111, first circular plate; 112, first connecting plate; 113, first connecting hole; 114, insert tube; 115, vertical plate; 116, end plate; 117, first reinforcing plate; 118, angle plate; 119, second connecting hole; 12, first circular tube; 13, fixing pin; 14, first middle frame; 141, second circular plate; 142, connecting strip; 143, second reinforcing plate; 144, insert hole; 15, pin hole; 2, lifting and lowering connecting frame; 21, frame plate; 211, flat plate; 212 , groove; 213, first channel; 214, third connecting hole; 215, side plate; 216, fourth connecting hole; 22, side plate; 23, support plate; 24, fixing plate; 25, U-shaped plate; 26, rod body; 27, pulley; 28, second channel; 29, fifth connecting hole; 3, second rack unit; 31, second end cover; 32, diagonal brace; 321, semicircular plate; 322, first ear plate; 323, sixth connecting hole; 324, second connecting plate; 325, second ear plate; 326, seventh connecting hole; 33, second round tube; 34, second middle frame.

[0045] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example 1

[0048] Reference Figure 1 - Fig.11A modular combined rack comprises: a first rack unit 1, the first rack unit 1 comprises: two first end covers 11, a plurality of first round tubes 12 are arranged between the two first end covers 11, both ends of each first round tube 12 are respectively connected to a corner close to the two first end covers 11, a plurality of fixing pins 13 are connected to the side of each first round tube 12, the plurality of fixing pins 13 on each first round tube 12 are equidistantly distributed, a first middle frame 14 is arranged between adjacent fixing pins 13, and one end of the first round tube 12 passes through the plurality of first middle frames 14 and is plugged into the first end cover 11.

[0049] The first end cover 11 includes: a plurality of first circular plates 111, the plurality of first circular plates 111 are equidistantly distributed in the direction of the virtual circle, a first connecting plate 112 is arranged between adjacent first circular plates 111, the two ends of the first connecting plate 112 are respectively connected to the side surfaces of the adjacent first circular plates 111, the plurality of first circular plates 111 and the plurality of first connecting plates 112 are integrally formed and form a cover plate, a through hole is provided in the middle of the cover plate, a first connecting hole 113 is provided in the inner edge of each corner of the cover plate, and a plug is connected to the side of each first circular plate 111 away from the lifting connection frame 2. Tube 114, a vertical plate 115 is arranged between adjacent inserted tubes 114, both ends of the vertical plate 115 are respectively connected to end plates 116, the inner wall of the vertical plate 115 is connected to a plurality of first reinforcing plates 117, the side of the vertical plate 115, the end plate 116, and the first reinforcing plate 117 close to the lifting connection frame 2 are all connected to the side of the first connecting plate 112 away from the lifting connection frame 2, an angle plate 118 is arranged between adjacent end plates 116, a second connecting hole 119 is opened through the middle of the angle plate 118, and the two sides of the angle plate 118 are respectively connected to the inner walls of the bottom of the two end plates 116.

[0050] The first middle frame 14 includes: a second circular plate 141, which is arranged on the outside of the first circular tube 12, and a plug hole 144 is penetrated and opened on one side of the second circular plate 141, and the plug hole 144 is slidably connected to the first circular tube 12, and a connecting strip 142 is provided between adjacent first circular plates 111, and the inner wall of the connecting strip 142 is connected to a plurality of second reinforcing plates 143, and the two ends of the connecting strip 142 are respectively connected to the side surfaces of the adjacent first circular plates 111, and the first reinforcing plate 117 and the second reinforcing plate 143 are both triangular plates 118.

[0051] In this example, see Figure 1 - Fig.11When in use, take out the first rack unit 1, each of which includes two first end covers 11, a plurality of first round tubes 12 between the two first end covers 11, a plurality of first middle frames 14, and a latch. The first end cover 11 is composed of a first round plate 111, a first connecting plate 112, and an insert 114. The first end cover 11 has various shapes, such as a triangle or a quadrilateral. Taking a quadrilateral as an example, the first end cover 11 has four corners, each of which is connected to an insert 114, and each insert 114 is plugged with a first round tube. Tube 12, each first end cover 11 is equipped with four first round tubes 12, and a plurality of first middle frames 14 are arranged between the two first end covers 11. The shape of the first middle frame 14 matches the shape of the first end cover 11 (the first middle frame 14 is also a quadrilateral frame). One end of the first round tube 12 passes through all the first middle frames 14 in sequence and plugs into the plug-in tube 114 on another first end cover 11. The more the number of first middle frames 14 on the first rack unit 1, the higher the stability of the first rack. The number of first middle frames 14 can be adjusted according to the construction environment and strength requirements. Because the basic structure of the first rack unit 1 is a molded steel structure, the most commonly used connection method should be plug-in and threaded connection. In order to reduce the number of threaded connections, the first rack unit 1 is used as the basic connection component. The staff does not need to assemble the first rack unit 1, but determines the height of the first rack according to the usage. The first rack unit 1 is mainly composed of an end cover, a middle frame, a round tube and a fixing pin 13. The end cover and the middle frame are molded glass fiber reinforced plastic structures, and the round tube is formed by a drawing, weaving and pultrusion process, which greatly increases the circumferential tensile strength. The adjacent first rack units 1 are threadedly fixed by screws passing through the first connection hole 113 and the second connection hole 119, and the four corners of the adjacent first rack units 1 are fixed. The first rack can be obtained by stacking and tightening several first rack units 1, simplifying the connection process. The connection method of the first rack is a modular tower, which allows high-altitude construction workers to fasten safety belts and achieve multi-level protection.

[0052] In summary, in this embodiment, the first rack unit 1 is stacked and fastened to obtain the first rack, and a molded steel structure is adopted, which is connected by threaded connection. The first rack unit 1 is used as the basic unit for connection, thereby achieving the effect of simplifying the connection method, improving the connection efficiency, and increasing the stability of the connection. The problems of high manufacturing cost of metal racks, theft of metal racks during outdoor construction, and difficulty in welding fiberglass are solved. Example 2

[0053] Reference Figure 1 - Fig. 20A modular combined row frame comprises: a lifting connection frame 2, one end of the first row frame unit 1 passes through the lifting connection frame 2 and is slidably connected to the lifting connection frame 2, the connection frame comprises: a plurality of frame plates 21, the frame plates 21 are arranged on the outside of the first circular tube 12, and the plurality of frame plates 21 are connected in sequence according to the circumferential first position of the virtual circle to form a frame body, and the inner wall of each corner of the frame body is connected with two side plates 22, one side plate 22 is connected to an inner wall of one corner of the frame body, and the other side plate 22 is connected to the other inner wall of one corner of the frame body, and the two side plates 22 are integrally formed and form a V-shaped plate, and support plates 23 are arranged at both ends of the V-shaped plate, and the two sides of the support plate 23 are respectively connected to the inner walls of the two side plates 22, and each support plate 23 is rotatably connected to a pulley 27 through a rod body 26, and the pulley 27 is slidably connected to the first circular tube 12.

[0054] The frame plate 21 includes: a flat plate 211, which is arranged on the outside of the first circular tube 12, a groove 212 is opened at the center of the outside of the flat plate 211, a first channel 213 is opened through the bottom of the groove 212, a plurality of third connecting holes 214 are opened through the outside of the flat plate 211, and the plurality of third connecting holes 214 are equidistantly distributed in the circumferential direction of the groove 212, and the edges of the flat plate 211 are connected to side plates 215, and the angle between the side plates 215 and the flat plate 211 is an obtuse angle, wherein a plurality of fourth connecting holes 216 are opened through the two side plates 215, and the two side plates 215 are symmetrically distributed about the axis of the flat plate 211, and adjacent frame plates 21 are threadedly connected through the fourth connecting holes 216.

[0055] A plurality of second holes 28 are provided through each side plate 22, and two fifth connection holes 29 are provided through the outer edge of each side plate 22, and the two second connection holes 119 are symmetrically distributed on both sides of the axis of the side plate 22. The upper surface of each support plate 23 is connected to a U-shaped plate 25 through a fixed plate 24, and a rod body 26 is arranged at one end of the U-shaped plate 25. The U-shaped plate 25 is composed of a transverse plate and plate bodies at both ends of the transverse plate, and the two ends of the rod body 26 are connected to the side close to the two plate bodies. The width of the fixed plate 24 is greater than the thickness of the support plate 23, and the outer side of the fixed plate 24 and the outer side of the support plate 23 are located in the same plane. The cross-sectional view of the pulley 27 is a compound inverted cone, and the spacing between the two fixing pins 13 is equal to the thickness of the first middle frame 14, and the diameter of the first middle frame 14 is equal to The outer diameter of the fixing pin 13 is provided with a pin hole 15 on the outer side of the fixing pin 13. The frame plate 21 includes: a flat plate 211, the flat plate 211 is arranged on the outer side of the first circular tube 12, a groove 212 is provided at the center of the outer side of the flat plate 211, a first channel 213 is provided through the bottom of the groove 212, a plurality of third connecting holes 214 are provided through the outer side of the flat plate 211, and the plurality of connecting holes are equidistantly distributed in the circumferential direction of the groove 212, the edges of the flat plate 211 are connected with side plates 215, and the angle between the side plates 215 and the flat plate 211 is an obtuse angle, wherein a plurality of fourth connecting holes 216 are provided through the two side plates 215, and the two side plates 215 are symmetrically distributed about the axis of the flat plate 211, and adjacent frame plates 21 are threadedly connected through the fourth connecting holes 216.

[0056] A modular combination rack comprises: a second rack unit 3, connected to one side of a lifting connection frame 2, the second rack unit 3 comprises: two second end covers 31, the second end covers 31 are connected to one side of the lifting connection frame 2, each corner of the second end cover 31 away from the lifting connection frame 2 is connected to a second round tube 33, the side of each second round tube 33 is connected to a plurality of fixing pins 13, a second middle frame 34 is arranged between adjacent fixing pins 13, a second round tube 33 is connected to another parallel second round tube 33 through a plurality of diagonal braces 32, and the diagonal braces 32 are used to reinforce the two second round tubes 33. The diagonal brace 32 is a half structure, and the diagonal brace 32 is composed of two half plates, each half plate includes: two semicircular plates 321, the semicircular plate 321 is arranged on the outside of the second circular tube 33, the edge of one side of the semicircular plate 321 is connected to the first ear plate 322, the middle part of the first ear plate 322 is penetrated with a sixth connecting hole 323, the edge of the other side of the semicircular plate 321 is connected to the second connecting plate 324, the bottom end of the second connecting plate 324 is connected to the other semicircular plate 321, the edges of both ends of the second connecting plate 324 are connected to the second ear plates 325, the middle part of the second ear plate 325 is penetrated with a seventh connecting hole 326, and the half plate is Z-shaped. The combined inverted cone is a combined figure formed by combining two inverted cones with narrower bottom surfaces, wherein the inverted cone is a shape with a wider bottom surface and gradually narrows upward, the arc surface of the pulley 27 is adapted to the arc surface of the fixing pin 13, the first end cover 11, the second end cover 31, the first middle frame 14, the second middle frame 34, and the diagonal brace 32 are all molded glass fiber reinforced plastic structures, and the first round tube 12 and the second round tube 33 are both formed by a drawing, braiding and pultrusion process.

[0057] An assembly method includes: a plurality of first rack units 1 are stacked and combined into a first rack, a plurality of second rack units 3 are stacked and combined into a second rack, both ends of the second rack are respectively connected to the adjacent sides of two lifting connection frames 2, each lifting connection frame 2 is slidably connected to a first rack, and the combined rack is composed of two first racks, a second rack, and a lifting connection frame 2.

[0058] In this example, see Figure 1 - Fig. 20When in use, the second rack unit 3 with diagonal braces 32 is added with diagonal braces 32 tubes (molded, half structure) on the basis of the first rack unit 1 to increase the load-bearing and bending resistance of the large-span crossarm. The second rack is connected by multiple layers of second rack units 3 (crossarms), and has good overall rigidity, which effectively ensures the stability when pulling the net and the support force when dropping the line. A frame body is assembled into a frame body by a plurality of frame plates 21, and the shape of the frame body is adapted to the shape of the first end cover 11 (the shape of the frame body is the same as the shape of the first end cover 11, and if the first end cover 11 is a quadrilateral, the frame body is also a quadrilateral), and the four corners of the frame body are reinforced with pulley groups 27, one pulley group 27 includes two pulleys 27, and the pulley group 27 is slidably connected with a fixing pin 13 on a first round tube 12, and the material strength of the fixing pin 13 is higher than the material strength of the first round tube 12, which prolongs the service life of the fixing pin 13, and facilitates the sliding of the frame body along the axis of the first rack, thereby changing the relative height of the frame body and the ground. A frame plate 21 on the frame is fixedly connected to the second rack unit 3 through the third connection hole 214. The length of the second rack is determined according to the spanning distance. The two ends of the second rack are fixedly connected to the frame plates 21 of the two lifting connection frames 2 and combined into a whole. The height of the second rack can be changed by the sliding action of the pulley 27 and the first rack. Compared with direct lifting, sliding upward is simpler. Because the height of the second rack is variable, there is no need to adopt the traditional operation method of high-altitude erection. Instead, it can be selected to be fixed at a location below 2 meters on the ground for construction, which reduces the time of high-altitude operation and reduces the risk of high-altitude operation. Compared with high altitude, ground operation is less difficult and more efficient. After the second rack is assembled and fixed, it can be easily reached by hoisting and other methods. The first rack and the second rack components are made of high-strength and light materials, modular design, and assembled into the first rack unit 1, the second rack unit 3 and the lifting frame unit in the factory. The number of construction components is reduced by 90% compared with ordinary steel pipe scaffolding, which is convenient for disassembly and transportation and reduces the number of handling times. The first frame unit 1 and the second frame unit 3 are connected by bolts and nuts. When installing, only four bolts need to be pre-tightened with an electric wrench, which reduces the number of fastener connections and saves more than 60% of the time compared with traditional scaffolding. The entire device is assembled and can be flexibly adjusted according to the usage, adapting to various forms of crossing, including roads, railways, bridges, and high-speed railways.

[0059] All parts are made of fiberglass to reduce their transportation weight and transportation costs. Due to the modular structure design, the number of handling times is greatly reduced, which reduces the overall cost. The same number of people (about 8 people per construction) are needed to set up ordinary steel pipe scaffolding and new electric scaffolding. Ordinary steel pipe scaffolding takes 9 days, while the new electric scaffolding only takes 3 days.

[0060] In summary, this embodiment connects the lifting connection frame 2 and the second rack as a whole, and uses the two first racks as basic support points to achieve the function of sliding the lifting connection frame 2 and the second rack along the axis direction of the first rack, achieving the effect of the second rack sliding and lifting after being assembled on the ground, solving the problem that most racks are erected at high altitudes and have high risks. In addition, most of the overall components are made of fiberglass and adopt a modular structure design, which reduces production costs and transportation costs, is easy to install, and avoids theft. Only threaded connections are used, and the installation method is simple and efficient.

[0061] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A modular combined rack, characterized in that: include: A first rack unit (1), the first rack unit (1) comprising: two first end covers (11), a plurality of first round tubes (12) being arranged between the two first end covers (11), two ends of each first round tube (12) being respectively connected to a corner close to the two first end covers (11), a plurality of fixing pins (13) being connected to the side surface of each first round tube (12), the plurality of fixing pins (13) on each first round tube (12) being equidistantly distributed, a first middle frame (14) being arranged between adjacent fixing pins (13), one end of the first round tube (12) passing through the plurality of first middle frames (14) and being plugged into the first end cover (11); A lifting connection frame (2), one end of the first rack unit (1) passes through the lifting connection frame (2) and is slidably connected to the lifting connection frame (2), the lifting connection frame (2) comprising: a plurality of frame plates (21), the frame plates (21) being arranged on the outside of the first circular tube (12), the plurality of frame plates (21) being connected in sequence according to the first position in the circumferential direction of the virtual circle to form a frame body, the inner wall of each corner of the frame body being connected to two side plates (22), one of the side plates (22) being connected to the frame body The side plate (22) is connected to an inner wall at one corner of the frame body, and another side plate (22) is connected to another inner wall at one corner of the frame body. The two side plates (22) are integrally formed to form a V-shaped plate. Support plates (23) are provided at both ends of the V-shaped plate. Both sides of the support plate (23) are respectively connected to the inner walls of the two side plates (22). Each support plate (23) is rotatably connected to a pulley (27) through a rod body (26), and the pulley (27) is slidably connected to the first round tube (12); The second rack unit (3) is connected to one side of the lifting connection frame (2), and the second rack unit (3) comprises: two second end covers (31), the second end covers (31) are connected to one side of the lifting connection frame (2), each corner of the second end cover (31) away from the lifting connection frame (2) is connected to a second round tube (33), the side of each second round tube (33) is connected to a plurality of fixing pins (13), a second middle frame (34) is arranged between adjacent fixing pins (13), and one second round tube (33) is connected to another parallel second round tube (33) through a plurality of diagonal braces (32), and the diagonal braces (32) are used to reinforce the two second round tubes (33).

2. The modular combination rack according to claim 1, characterized in that: The structure of the second end cover (31) is the same as that of the first end cover (11), the structure of the first circular tube (12) and the second circular tube (33), and the structure of the first middle frame (14) and the second middle frame (34). The first end cover (11) comprises: a plurality of first circular plates (111), the plurality of first circular plates (111) are equidistantly distributed in the direction of a virtual circle, a first connecting plate (112) is provided between adjacent first circular plates (111), the two ends of the first connecting plate (112) are respectively connected to the side surfaces of adjacent first circular plates (111), the plurality of first circular plates (111) and the plurality of first connecting plates (112) are integrally formed to form a cover plate, a through hole is provided in the middle of the cover plate, a first connecting hole (113) is provided in the inner edge of each corner of the cover plate, and each of the first circular plates (111) is provided with a through hole. A side of a circular plate (111) away from the lifting connection frame (2) is connected to an insert tube (114), a vertical plate (115) is arranged between adjacent insert tubes (114), both ends of the vertical plate (115) are respectively connected to end plates (116), the inner wall of the vertical plate (115) is connected to a plurality of first reinforcement plates (117), the side of the vertical plate (115), the end plate (116), and the first reinforcement plate (117) close to the lifting connection frame (2) are all connected to the side of the first connection plate (112) away from the lifting connection frame (2), an angle plate (118) is arranged between adjacent end plates (116), a second connection hole (119) is opened through the middle of the angle plate (118), and the two sides of the angle plate (118) are respectively connected to the inner walls of the bottoms of the two end plates (116).

3. The modular combination rack according to claim 2, characterized in that: The first middle frame (14) comprises: a second circular plate (141), the second circular plate (141) being arranged outside the first circular tube (12), a plug hole (144) being penetrated through one side of the second circular plate (141), the plug hole (144) being slidably connected to the first circular tube (12), a connecting strip (142) being arranged between adjacent first circular plates (111), the inner wall of the connecting strip (142) being connected to a plurality of second reinforcing plates (143), the two ends of the connecting strip (142) being respectively connected to the side surfaces of adjacent first circular plates (111), and the first reinforcing plate (117) and the second reinforcing plate (143) being both triangular plates (118).

4. The modular combination rack according to claim 2, characterized in that: Each of the side plates (22) is provided with a plurality of second holes (28), and the outer edge of each of the side plates (22) is provided with two fifth connection holes (29). The two second connection holes (119) are symmetrically distributed on both sides of the axis of the side plate (22). The upper surface of each of the support plates (23) is connected to a U-shaped plate (25) via a fixed plate (24). The rod body (26) is arranged at one end of the U-shaped plate (25). The U-shaped plate (25) is composed of a horizontal plate and plate bodies at both ends of the horizontal plate. The two ends of the rod body (26) are connected to the sides of the two plate bodies that are close to each other. The width of the fixed plate (24) is greater than the thickness of the support plate (23). The outer side of the fixed plate (24) and the outer side of the support plate (23) are located in the same plane. The cross-sectional view of the pulley (27) is a composite inverted cone.

5. The modular combination rack according to claim 1, characterized in that: The distance between the two fixing pins (13) is equal to the thickness of the first middle frame (14); the diameter of the first middle frame (14) is equal to the outer diameter of the fixing pin (13); and a pin hole (15) is provided on the outer side of the fixing pin (13).

6. The modular combination rack according to claim 1, characterized in that: The frame plate (21) comprises: a flat plate (211), the flat plate (211) being arranged on the outside of the first circular tube (12), a groove (212) being provided at the center of the outside of the flat plate (211), a first channel (213) being provided through the bottom of the groove (212), a plurality of third connection holes (214) being provided through the outside of the flat plate (211), the plurality of third connection holes (214) being distributed equidistantly along the circumferential direction of the groove (212), side plates (215) being connected to the edges of the flat plate (211), the angle between the side plates (215) and the flat plate (211) being an obtuse angle, wherein a plurality of fourth connection holes (216) are provided through two of the side plates (215), the two side plates (215) being distributed symmetrically along the axis of the flat plate (211), and adjacent frame plates (21) being threadedly connected via the fourth connection holes (216).

7. The modular combined rack according to claim 1, characterized in that: The diagonal brace (32) is a half structure, and the diagonal brace (32) is composed of two half plates, each of which comprises: two semicircular plates (321), the semicircular plates (321) are arranged on the outside of the second circular tube (33), the edge of one side of the semicircular plate (321) is connected to a first ear plate (322), the middle of the first ear plate (322) is penetrated with a sixth connection hole (323), the edge of the other side of the semicircular plate (321) is connected to a second connection plate (324), the bottom end of the second connection plate (324) is connected to the other semicircular plate (321), the edges of both ends of the second connection plate (324) are connected to second ear plates (325), the middle of the second ear plate (325) is penetrated with a seventh connection hole (326), and the half plates are in a Z shape.

8. The modular combination rack according to claim 4, characterized in that: The composite inverted cone is a composite figure formed by combining two inverted cones with relatively narrow bottom surfaces, wherein the inverted cone is a shape with a relatively wide bottom surface that gradually narrows upwards, the arc surface of the pulley (27) is compatible with the arc surface of the fixing pin (13), the first end cover (11), the second end cover (31), the first middle frame (14), the second middle frame (34), and the diagonal brace (32) are all molded glass fiber reinforced plastic structures, and the first round tube (12) and the second round tube (33) are both formed by a pultrusion process.

9. An assembly method, characterized in that: Used to assemble the modular combination rack described in any one of claims 1 to 8, comprising: a plurality of the first rack units (1) are stacked and combined into a first rack, a plurality of the second rack units (3) are stacked and combined into a second rack, the two ends of the second rack are respectively connected to the sides close to the two lifting connection frames (2), each of the lifting connection frames (2) is slidably connected to a first rack, and the combined rack consists of two first racks, a second rack, and a lifting connection frame (2).

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