Anti-falling device of steel net rack and anti-falling steel net rack

Abstract

The invention provides an anti-falling device of a steel net rack and the anti-falling steel net rack. The steel net rack comprises a supporting column and a net rack body, a steel net rack support is installed on the top of the supporting column, the net rack body comprises a support ball joint and a net rack rod piece connected with the support ball joint, and the net rack body is welded to the steel net rack support through the support ball joint. The column hoop piece is fixed on a column body at the top of the supporting column in a sleeving manner; the support ball joint box is arranged on the support ball joint in a sleeving mode, and meanwhile the support ball joint box is arranged on the multiple net rack rod pieces of the support ball joint in a sleeving mode; one end of the high-strength pull rope is fixedly connected with the column hoop piece, and the other end of the high-strength pull rope is fixedly connected with the support ball joint box; when the steel net rack support is separated from the supporting column, the high-strength pull rope pulls the net rack body through the support ball joint box to prevent the net rack body from falling. The risk that the steel grid frame falls to hurt people can be avoided, the structural safety of the steel grid frame structure under accidental factors is guaranteed, and personnel and property safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of housing construction safety, and in particular to an anti-falling device for a steel grid frame and an anti-falling steel grid frame. Background Art

[0002] The steel grid structure is a mesh structure system composed of many rods in a certain pattern. It has the characteristics of light weight, large span, good structural stability and fast construction speed. It is widely used in large public buildings such as gymnasiums, exhibition halls, and terminal buildings. The design and construction of the steel grid structure must strictly comply with the corresponding national and industry standards to ensure the safety and functionality of the structure.

[0003] In recent years, due to illegal and irregular repair and construction, corrosion of steel truss rods, nodes and supports, and insufficient bearing capacity of support rods, there have been many safety incidents in which steel truss structure supports have been pulled off and the entire steel truss has fallen to the ground, causing casualties and large-scale economic losses.

[0004] It can be seen that the current existing technology has great hidden dangers in terms of safety. The safety of steel grids should be given sufficient attention. Even in the event of a fall, the principle of life first should be adhered to to ensure that no casualties occur as the bottom line. Summary of the invention

[0005] In view of the deficiencies in the prior art and the technical shortcomings of frequent falling accidents of steel grid structure supports, the present invention designs a steel grid anti-falling device that can eliminate the risk of steel grid structure supports falling and injuring people, and ensure the structural safety of the steel grid structure under accidental factors.

[0006] The technical solution of the present invention is as follows:

[0007] The present invention first provides a falling prevention device for a steel grid frame, wherein the steel grid frame comprises a supporting column and a grid frame body, a steel grid frame support is installed on the top of the supporting column, the grid frame body comprises a support ball node and a grid frame rod connected to the support ball node, and the grid frame body is welded to the steel grid frame support via the support ball node. The falling prevention device comprises:

[0008] A column sleeve member, wherein the column sleeve member is sleeved and fixed on the column body at the top of the supporting column;

[0009] A support ball node box, the support ball node box is sleeved on the support ball node and is also sleeved on a plurality of grid rods of the support ball node;

[0010] At least one high-strength pull rope, one end of which is connected and fixed to the column sleeve, and the other end of which is connected and fixed to the support ball node box;

[0011] When the steel grid support is separated from the supporting column, the high-strength pull rope pulls the grid body through the support ball node box to prevent it from falling.

[0012] In some preferred embodiments, the column hoop is formed by welding steel plates around and around, and is hooped around the column body at the top of the supporting column; and a bolt rod is welded on the outer wall of at least one of the steel plates, or at least one of the steel plates is preset with a through hole, in which a bolt rod is passed, and the bolt rod is passed into the supporting column for connecting and fixing the high-strength pull rope.

[0013] In some preferred embodiments, the bolt rods are symmetrically arranged on two opposite steel plates of the column sleeve, and the high-strength pull ropes include two, which are respectively connected to the bolt rods and the support ball node box.

[0014] In some preferred embodiments, the support ball node box is formed by welding steel plates from all sides and the top, and is sleeved on the support ball node. The steel plates on all sides corresponding to the truss rods are preset with through holes and are sleeved on the corresponding truss rods.

[0015] In some preferred embodiments, the steel plates at the corresponding truss rods on all sides are composed of two half steel plates, and semicircular holes are preset in the centers of the two half steel plates. When the two half steel plates are butt-jointed, the two semicircular holes form a through hole, which is sleeved on the corresponding truss rods.

[0016] In some preferred embodiments, the steel plate at the top is welded with an ear plate, and the ear plate is provided with a through hole for connecting and fixing the high-strength pull rope with the help of connecting bolts.

[0017] In some preferred embodiments, the ear plates include two and are symmetrically arranged to symmetrically connect and fix the two high-strength pull ropes.

[0018] In some preferred embodiments, end plates are respectively provided at both ends of the high-strength pull rope, and through holes are provided on the end plates.

[0019] In some preferred embodiments, the column sleeve and the support ball node box are both welded and formed on site.

[0020] The present invention also provides an anti-falling steel grid frame, on which the anti-falling device is installed.

[0021] The beneficial effects of the present invention over the prior art are as follows: the present invention provides a steel grid anti-falling device, which overcomes the shortcomings of the prior art, prevents the steel grid structure from falling or the entire steel grid structure from collapsing, and thus ensures the safety of personnel and property. The specific advantages include at least one or more of the following:

[0022] (1) The anti-falling device provided by the present invention automatically enters the working state immediately and automatically pulls the steel grid structure to prevent it from falling once an accidental incident causes the support of the steel grid structure to be damaged and fall.

[0023] (2) The anti-fall device provided by the present invention has a high-strength pull rope made of high-toughness material. According to actual conditions, multiple pull ropes can be set. When entering the working state, the tension load can withstand the weight of the entire steel grid, ensuring that the device plays the expected role.

[0024] (3) The anti-fall device provided by the present invention connects the steel grid body by designing a support ball node box to ensure a firm and stable connection. When an accident occurs, the steel grid will not fall off the device.

[0025] (4) The anti-fall device provided by the present invention, the column sleeve and the support ball node box are all formed by welding steel plates on site, which is simple and convenient to install and can adapt to different types of support columns and steel grid bodies.

[0026] (5) The anti-fall device provided by the present invention has a simple structural design and is easy to promote and use.

[0027] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0029] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0030] Figure 1 It is a schematic diagram of the steel grid structure in the background technology of the present invention;

[0031] Figure 2 It is an enlarged schematic diagram of the steel grid structure in the background technology of the present invention;

[0032] Figure 3 It is a schematic diagram of the stress condition of the steel grid support in the background technology of the present invention;

[0033] Figure 4 It is an enlarged schematic diagram of the stress condition of the steel grid support in the background technology of the present invention;

[0034] Figure 5 It is a schematic diagram of the installation of a falling prevention device of a steel grid according to one embodiment of the present invention;

[0035] Figure 6 This is a schematic structural diagram of a steel grid anti-falling device according to an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a normal state of a falling prevention device of a steel grid according to an embodiment of the present invention;

[0037] Figure 8 A schematic diagram of a working state of a falling prevention device of a steel grid according to an embodiment of the present invention;

[0038] Fig. 9 A schematic diagram of the structure of a column hoop according to an embodiment of the present invention;

[0039] Fig.10 A schematic diagram of a support ball node box structure according to an embodiment of the present invention;

[0040] Fig.11 It is a schematic diagram of the socket connection between the steel plate of the bearing ball node box and the rod member according to an embodiment of the present invention;

[0041] Fig.12 A schematic diagram of a high-strength pull rope structure according to an embodiment of the present invention;

[0042] Figure 13-15 These are diagrams one, two and three of the steel grid support falling incident.

[0043] Markings in the figure:

[0044] 100, steel grid; 101, supporting column; 102, steel grid support; 103, support ball node; 104, rod; 105, general ball node;

[0045] 200, anti-fall device; 201, column hoop; 201a, bolt rod; 201b, nut; 202, bearing ball node box; 202a, ear plate; 202b, connecting bolt; 203, high-strength pull rope; 203a, end plate.

[0046] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0050] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device, component or structure must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] Typical steel grid structures include Figure 1 As shown in Figure 2, the connection conditions near the steel grid structure support are as follows: Figure 2 The rods are connected by ball joints, which are divided into general conventional ball joints and support ball joints. The support ball joints are connected and fixed to the support, and the support is connected and fixed to the support column, thereby forming a stable structure.

[0053] Through structural mechanics calculations, we know that Figure 3 , Figure 4 As shown in the figure, when the steel grid structure bears various loads on the roof, it will apply downward vertical pressure N and inward horizontal tension T to the support. The inward horizontal tension T will pull the support off the support column, causing the steel grid to fall. The existing means is to fix the support to the support column by welding or bolting, and the structural design makes the bearing capacity of the support connection greater than the inward horizontal tension T, thereby preventing the steel grid from falling.

[0054] However, although the structural design can ensure that the steel grid structure will not have support damage or fall in most cases, various unexpected situations may still occur, causing the steel grid structure support to be pulled apart and separated from the supporting column, causing the entire steel grid structure to fall, resulting in loss of life and property. Accidents caused by the fall of steel grid structure supports are common.

[0055] In view of this, the present invention designs a falling prevention device for a steel grid frame, which can avoid the risk of the steel grid frame structure supporting falling, causing the steel grid frame to collapse and injure people, and ensure the structural safety of the steel grid structure under accidental factors.

[0056] The implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0057] The steel grid structure is a mesh structure system composed of many rods according to a certain pattern. It has the characteristics of light weight, large span, good structural stability and fast construction speed. Figure 1 The steel grid 100 structure shown is a typical steel grid structure in actual use, and is widely used in large public buildings such as gymnasiums, exhibition halls, and terminal buildings. Figure 2 This is the connection situation near the steel grid support 102. The rods 104 are connected through ball nodes. The ball nodes are divided into general ball nodes 105 and support ball nodes 103. The support ball nodes 103 are connected and fixed to the steel grid support 102, and the steel grid support 102 is connected and fixed to the support column 101, thereby forming a stable structure. Figure 3 , Figure 4 As shown, in practice, when the steel grid 100 structure bears various loads on the roof, it will apply downward vertical pressure N and inward horizontal tension T to the steel grid support 102. The inward horizontal tension T will pull the steel grid support 102 off the supporting column 101, causing the steel grid 100 to fall.

[0058] See also Figure 2The steel grid 100 includes a support column 101 and a grid body, and a steel grid support 102 is installed on the top of the support column 101. In some embodiments, in order to increase stability, the steel grid support 102 is welded to the top of the support column 101. The grid body includes a support ball node 103 and a grid rod 104 connected to the support ball node 103. The grid rod 104 crosses the support ball node 103 and the conventional ball node 105 to form a cross network structure. The grid body is welded to the steel grid support 102 via the support ball node 103. The steel grid support 102 mainly plays the role of bearing the grid body and transferring the weight load of the grid body to the support column 101.

[0059] The anti-fall device 200 of the steel grid 100 provided by the present invention is shown in FIG. Figures 5 to 7 The anti-fall device 200 mainly includes: a column sleeve 201, a support ball node box 202 and at least one high-strength pull rope 203.

[0060] Specifically, the column sleeve 201 is sleeved and fixed on the column body at the top of the supporting column 101, the support ball node box 202 is sleeved on the support ball node 103, and is also sleeved on a plurality of grid rods 104 of the support ball node 103, and one end of the high-strength pull rope 203 is connected and fixed to the column sleeve 201, and the other end is connected and fixed to the support ball node box 202. When the steel grid support 102 is separated from the supporting column 101, the high-strength pull rope 203 pulls the grid body through the support ball node box 202 to prevent it from falling, thereby improving the safety of the steel grid structure and ensuring the safety of personnel and property.

[0061] Continue to see Figures 5 to 9 In order to more firmly connect and fix the column hoop 201 to the steel grid 100 and install it on the assembled steel grid 100 structure, the column hoop 201 is welded on site. The column hoop 201 is formed by welding the steel plates around. That is to say, according to the size of the column body and considering the load-bearing conditions, the size of the steel plate is pre-cut, and then the construction personnel weld the steel plate close to the column body. After welding, the column hoop 201 is sleeved on the column body at the top of the supporting column 101.

[0062] In some embodiments, the column body of the supporting column 101 is a square column, and the column sleeve 201 after enclosing and welding is in the shape of a square. It should be noted that the shape of the column sleeve 201 after enclosing and welding matches the shape of the column body of the supporting column 101. For example, when the column body is a cylindrical column, the column sleeve 201 forms a ring around the column body after welding. When an accident occurs, the column sleeve 201 plays the role of fixing the node, so that the steel grid 100 is prevented from falling.

[0063] A bolt rod 201a is welded on at least one of the outer walls of the welded column sleeve 201, or a through hole is preset on at least one of the steel plates, and a bolt rod 201a is passed through the through hole for connecting and fixing the high-strength pull rope 203, and the bolt rod 201a can be further passed into the supporting column 101 for connecting and fixing the high-strength pull rope 203, so as to enhance the connection strength of the bolt rod 201a.

[0064] In some embodiments, end plates 203a are provided at both ends of the high-strength pull rope 203. After the end plates 203a are sleeved on the bolt rod 201a, the nuts 201b are installed and tightened to achieve a stable connection between the column sleeve 201 and the high-strength pull rope 203.

[0065] In some embodiments, since the column body of the support column 101 is a square column, the column sleeve 201 is enclosed and welded to form a square shape, and bolt rods 201a are symmetrically arranged on two steel plates on the two opposite side walls of the square shape of the column sleeve 201. At the same time, in order to increase the tensile load of the anti-fall device 200, the high-strength pull rope 203 includes two, and the two ends are respectively connected to the bolt rod 201a on the column sleeve 201 and the support ball node box 202.

[0066] Continue to see Figure 2 , Figure 5 , Figure 6 , Fig.10 , Fig.11 The support ball node box 202 is also welded on site. The steel plate is pre-cut according to the size of the support ball node 103. The support ball node box 202 is formed by welding the steel plates from the surrounding and top, and is sleeved on the support ball node 103. The steel plates at the surrounding corresponding to the grid rods 104 are preset with through holes, and are sleeved on the corresponding grid rods 104. It should be noted that if Fig.11 As shown, the steel plates at the surrounding corresponding to the grid rods 104 are composed of two half steel plates, and the centers of the two half steel plates are preset with semicircular holes. When the two half steel plates are butted, the two semicircular holes form a through hole, which is sleeved on the corresponding grid rods 104. The two half steel plates and the preset semicircular holes thereon are pre-cut and designed in advance according to the size of the support ball node 103 and the grid rod 104.

[0067] In some embodiments, the welded support ball node box 202 has a cube structure, such as Figure 5 , Fig.10As shown, the steel plates on the three sides of the cube are welded by two and a half steel plates to ensure that they can be mounted on the rod 104 on the steel grid. The centers of the two and a half steel plates are preset with semicircular holes. When the two and a half steel plates are butted, the two semicircular holes form a through hole and are spliced ​​into a square steel plate. The rod 104 of the steel grid 100 is inserted into the through hole. With this design, the support ball node box 202 forms a stable connection with the support ball node 103 of the steel grid 100. When an accident occurs, the high-strength pull rope 203 can pull the steel grid 100 through the support ball node box 202 to prevent it from falling.

[0068] Continue to see Figure 5 , Fig.10 In some embodiments, a pair of ear plates 202a are welded to the steel plate on the top of the support ball node box 202. The ear plates 202a include two symmetrically arranged ones, and are used to symmetrically connect and fix two high-strength pull ropes 203. The ear plates 202a are provided with through holes, and are used to connect and fix the end plates 203a of the high-strength pull ropes 203 with the help of connecting bolts 202b.

[0069] See also Figure 5 , Fig.12 The high-strength pull rope 203 is made of a high-strength, high-toughness flexible material, such as a steel strand. End plates 203a are provided at both ends of the high-strength pull rope 203, and the end plates 203a are circular and provided with through holes. The through holes on the end plates 203a and the through holes on the ear plates 202a are connected and fixed by connecting bolts 202b, and the high-strength pull rope 203 and the support ball node box 202 form a fixed connection structure. The through hole on the other end plate 203a is sleeved on the bolt rod 201a of the column hoop 201, and the high-strength pull rope 203 and the column hoop 201 form a fixed connection structure.

[0070] Under the condition that the steel grid support 102 falls, the design calculation formula for the cross-sectional area A of the high-strength and high-toughness pull rope is as follows:

[0071]

[0072] Where: μ is the dynamic load coefficient, F is the load value within the influence range of the device, and [σ] is the allowable stress value of the rope material.

[0073] It should be noted that, according to the load-bearing requirements, multiple high-strength pull ropes 203 can be provided, and multiple bolt rods 201a and multiple ear plates 202a can be matched to connect with them.

[0074] The working principle of the present invention is as follows:

[0075] Continue to see Figure 7 , Figure 7 This is the normal state of the anti-fall device 200 of the present invention:

[0076] (1) The column sleeve 201 is fixed at the top column position of the supporting column 101;

[0077] (2) The cut steel plates are welded at the position of the bearing ball node 103 to form a bearing ball node box 202;

[0078] (3) The end plate 203 a at one end of the high-strength pull rope 203 is connected to the column sleeve 201 by bolt connection, and the end plate 203 a at the other end is connected to the support ball node box 202.

[0079] Continue to see Figure 8 , Figure 8 The working state of the anti-fall device 200 of the present invention is:

[0080] Once an accident occurs, causing the steel grid support 102 to be damaged and fall, the anti-fall device 200 will automatically enter the working state, and the anti-fall device 200 will effectively limit the fall of the steel grid 100 structure, so that the personnel and property under the steel grid 100 structure are protected from loss. It should be noted that the material used for the high-strength pull rope 203 should be a high-strength, high-toughness material, and the size of the device must be designed and calculated to ensure that the device functions as expected.

[0081] The specific design and installation steps of the present invention are as follows:

[0082] (1) According to the current status of the steel grid 100, design the drawings of the anti-fall device 200 and determine the size of the steel plate;

[0083] (2) Cut the steel plates according to the design drawings;

[0084] (3) According to the design, the steel plate structures that can be welded in advance will be welded in advance in the factory to reduce the workload of on-site welding;

[0085] (4) splicing the column sleeve 201 and the bearing ball node box 202 together on site and welding them firmly;

[0086] (5) Connect the welded column sleeve 201 and the support ball node box 202 through a high-strength pull rope 203.

[0087] The present invention also comprises an anti-falling steel grid frame, on which the anti-falling device is installed.

[0088] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A falling prevention device for a steel grid, the steel grid comprising a support column and a grid body, a steel grid support is installed on the top of the support column, the grid body comprises a support ball node and a grid rod connected to the support ball node, the grid body is welded to the steel grid support via the support ball node, characterized in that: The fall prevention device comprises: A column sleeve member, wherein the column sleeve member is sleeved and fixed on the column body at the top of the supporting column; A support ball node box, the support ball node box is sleeved on the support ball node and is also sleeved on a plurality of grid rods of the support ball node; At least one high-strength pull rope, one end of which is connected and fixed to the column sleeve, and the other end of which is connected and fixed to the support ball node box; When the steel grid support is separated from the supporting column, the high-strength pull rope pulls the grid body through the support ball node box to prevent it from falling.

2. The anti-fall device according to claim 1, characterized in that: The column hoop is formed by welding steel plates around and around, and is hooped on the column body at the top of the supporting column; and a bolt rod is welded on the outer wall of at least one of the steel plates, or at least one of the steel plates is preset with a through hole, in which a bolt rod is passed, and the bolt rod is passed into the supporting column for connecting and fixing the high-strength pull rope.

3. The anti-fall device according to claim 2, characterized in that: The bolt rods are symmetrically arranged on two opposite steel plates of the column sleeve, and the high-strength pull ropes include two, which are respectively connected to the bolt rods and the support ball node box.

4. The anti-fall device according to claim 1, characterized in that: The support ball node box is formed by welding steel plates from all sides and the top, and is sleeved on the support ball node. The steel plates at the four sides corresponding to the grid rods are preset with through holes and sleeved on the corresponding grid rods.

5. The anti-fall device according to claim 4, characterized in that: The steel plates at the surrounding corresponding grid rods are composed of two half steel plates, both of which have semicircular holes in the center. When the two half steel plates are butt-jointed, the two semicircular holes form a through hole, which is sleeved on the corresponding grid rods.

6. The anti-fall device according to claim 4, characterized in that: The steel plate at the top is welded and fixed with an ear plate, and the ear plate is provided with a through hole for connecting and fixing the high-strength pull rope with the help of connecting bolts.

7. The anti-fall device according to claim 6, characterized in that: The ear plates include two and are symmetrically arranged, and are used to symmetrically connect and fix the two high-strength pull ropes.

8. The anti-fall device according to any one of claims 1 to 7, characterized in that: The two ends of the high-strength pull rope are respectively provided with end plates, and the end plates are provided with through holes.

9. The anti-fall device according to any one of claims 1 to 7, characterized in that: The column sleeve and the support ball node box are both formed by welding on site.

10. A fall-proof steel grid, characterized in that: The anti-falling steel grid is installed with the anti-falling device described in any one of claims 1-9.

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