A pull rod for tensioning cable and a method of using the same

Abstract

The present invention provides a tension rod for tensioning cables, the tension rod comprising a fixing unit, an adjusting unit and a cable passing unit; the fixing unit is used to be fixed on a building structure; the adjusting unit is arranged between the fixing unit and the cable passing unit, and the adjusting unit is used to adjust the distance between the cable passing unit and the building structure; the cable passing unit is used to insert the cable. Since the adjusting unit can adjust the distance between the cable passing unit and the building structure, the length of the tension rod can be adjusted; the cable can move relative to the building structure along with the cable passing unit, and the tension of the cable also changes during the change of the length of the tension rod, so that the installation of the tension rod and the cable can be adjusted on site, thereby improving the construction efficiency of the tension cable net. Since the surface area of ​​the connecting plate is large, the stress at the connection node position between the tension rod and the wooden structure is dispersed, thereby improving the strength and stability of the lattice shell structure.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a pull rod for tensioning a cable and a use method thereof. Background Art

[0002] At present, almost all cases of large-span space lattice shell structure projects are steel structures and aluminum alloy structures, while wooden structures are rarely used. This is mainly because the material of wooden structures is uneven, the transverse compression and tension resistance is weak, and it is difficult to achieve rigidity in the connection between wooden beams, resulting in many structural systems being unsuitable for wooden structures.

[0003] Glued laminated wood has many advantages such as light weight, green and environmental protection, convenient construction and installation, and can realize assembly construction. It is very suitable for some buildings with special functions or buildings that need wooden structure effects. In addition, wooden structure materials are renewable resources and are in line with the general direction of green environmental protection and assembly installation. Therefore, it is necessary to develop a large-span glued laminated wood building grid shell structure system. However, as the span increases, the rigidity of the wooden grid shell structure becomes weaker, and it is necessary to add bidirectional cables on the inside of the wooden structure to increase the overall rigidity of the grid shell structure, thereby ensuring the stability of the grid shell structure.

[0004] The curved cable net needs to be generated according to the curved surface shape of the lattice shell structure, and the cable net and the glued wood need to be connected by rigid tie rods. Among them, the cable net is usually a mesh structure composed of multiple groups of bidirectional cables. Conventional tie rods are usually steel pipes with fixed lengths with hinged holes. If conventional tie rods are used to connect to the connection nodes on the wood structure by hinged connection, it will make the tension of the cable difficult to adjust; the stress at the connection node position on the wood structure is relatively concentrated, thereby reducing the strength and stability of the lattice shell structure; and the curved cable net has a complex shape, and it is very difficult to tension the cable net using conventional methods, and it is difficult to achieve on-site tensioning. Summary of the invention

[0005] The invention provides a tension rod for tensioning a cable and a use method thereof, so as to solve the technical problems that the length of the existing tension rod is fixed, stress concentration at the connection node position of the building structure is caused, and the tensioning cable is difficult.

[0006] In order to solve the above technical problems, the present invention provides a pull rod for tensioning a cable, wherein the pull rod comprises a fixing unit, an adjusting unit and a cable passing unit;

[0007] The fixing unit is used to be fixed on the building structure;

[0008] The adjusting unit is disposed between the fixing unit and the cable passing unit, and the adjusting unit is used to adjust the distance between the cable passing unit and the building structure;

[0009] The cable passing unit is used for inserting the cable.

[0010] Optionally, the building structure is a wooden lattice shell, and the fixing unit includes a connecting plate and a connecting rod;

[0011] The two ends of the connecting rod are respectively connected to the connecting plate and the adjusting unit;

[0012] The connecting plate is used to be fixed on the wooden structure lattice shell.

[0013] Optionally, the pull rod includes a plurality of the fixing units.

[0014] Optionally, the pull rod includes four fixing units; the adjustment unit includes a connecting seat, one end of the connecting rod of each fixing unit is connected to the connecting seat, and the other end is connected to a corresponding connecting plate;

[0015] The four connecting rods are evenly distributed on the connecting seat along the circumference of the connecting seat, and the lengths of the connecting rods at relative positions are equal;

[0016] An included angle A between the connecting rod and the central axis of the connecting seat satisfies 0°<A<90°, and the included angles between the connecting rod and the central axis at relative positions are equal.

[0017] Optionally, the connecting plate is a square plate, and the square plate is provided with through holes for fixing.

[0018] Optionally, the connecting plate and the connecting rod are connected by welding; the connecting rod and the connecting seat are connected by threads.

[0019] Optionally, the adjustment unit also includes an adjusting nut and an adjusting screw; the connecting seat is provided with a through threaded hole along the direction of the central axis; one end of the adjusting screw passes through one end of the threaded hole and is connected to the adjusting nut, and the other end of the adjusting screw passes through the other end of the threaded hole and is connected to the cable passing unit.

[0020] Optionally, the cable passing unit includes a first cable passing component, a connecting screw and a second cable passing component;

[0021] One end of the first cable-passing component is connected to the other end of the adjusting screw, and the other end of the first cable-passing component is connected to one end of the connecting screw; the other end of the connecting screw is connected to one end of the second cable-passing component;

[0022] The first cable passing component and the second cable passing component are both provided with a cable passing hole for passing the cable and a glue injection hole for injecting structural glue;

[0023] The lengths of the adjusting screw and the connecting screw are equal to or greater than a preset threshold, so that the other end of the adjusting screw contacts the cable in the first cable passing component and generates an extrusion force, and the other end of the connecting screw contacts the cable in the second cable passing component and generates an extrusion force.

[0024] Optionally, the outer side wall of the connecting screw is provided with a slot for rotational fixation.

[0025] The present invention also provides a method for using a tension rod for a tension cable, the method comprising:

[0026] Pass the cable through the pull rod described above;

[0027] fixing the tie rod to the building structure;

[0028] Fixing both ends of the cable;

[0029] The distance between the cable passing unit and the building structure is adjusted by the adjusting unit so that the tension of the cable reaches a preset threshold;

[0030] The pull cable is fixed to the pull rod.

[0031] The present invention provides a pull rod for tensioning cables and a method for using the same. Since the pull rod includes an adjustment unit, the adjustment unit can adjust the distance between the cable passing unit and the building structure, so that the length of the pull rod can be adjusted; the cable can move relative to the building structure along with the cable passing unit, and the tension of the cable also changes during the change of the length of the pull rod, so that the installation of the pull rod and the cable can be adjusted on site, thereby improving the construction efficiency of the tensioning cable net. Since the surface area of ​​the connecting plate is large, the stress at the connection node position between the pull rod and the wooden structure is dispersed, thereby improving the strength and stability of the lattice shell structure. The connecting rod and the connecting seat are detachably connected by threads, so that they can be easily packaged and transported separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a pull rod for tensioning a cable provided by one embodiment of the present invention;

[0033] Figure 2 yes Figure 1 Exploded diagram of

[0034] Figure 3 yes Figure 1 An enlarged view of the first cable-passing component in FIG.

[0035] Figure 4 yes Figure 1 An enlarged view of the connecting screw in FIG.

[0036] Figure 5This is a diagram of the initial installation of the pull rods and cables;

[0037] Figure 6 It is a schematic diagram of the pull rod and the cable when they are in place.

[0038] [Description of reference numerals is as follows]:

[0039] 1-connecting plate; 2-connecting rod; 3-connecting seat; 4-adjusting nut; 5-adjusting screw; 6-washer; 7-first cable passing component; 8-connecting screw; 9-second cable passing component; 10-locking hole; 11-glue injection hole; 12-slot. DETAILED DESCRIPTION

[0040] In order to make the purpose, advantages and features of the present invention more clear, the following is a further detailed description of a pull rod for tensioning a cable and a method of using the same proposed by the present invention in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0041] refer to Figure 1 and Figure 2 As shown, the present invention provides a pull rod for tensioning cables, the pull rod comprising a fixing unit, an adjusting unit and a cable passing unit; the fixing unit is used to be fixed on a building structure; the adjusting unit is arranged between the fixing unit and the cable passing unit, and the adjusting unit is used to adjust the distance between the cable passing unit and the building structure; the cable passing unit is used to insert the cable.

[0042] The present invention provides a pull rod for tensioning a cable. Since the pull rod includes an adjusting unit, the adjusting unit can adjust the distance between the cable passing unit and the building structure, so that the length of the pull rod can be adjusted; the cable can move relative to the building structure along with the cable passing unit, and the tension of the cable also changes during the change of the length of the pull rod. In this way, the installation of the pull rod and the cable can be adjusted on site, thereby improving the construction efficiency of the tensioning cable net.

[0043] Optional, such as Figure 1 and Figure 2 As shown, the building structure is a wooden lattice shell, and the fixing unit includes a connecting plate 1 and a connecting rod 2; the two ends of the connecting rod 2 are respectively connected to the connecting plate 1 and the adjusting unit; the connecting plate 1 is fixed on the wooden lattice shell.

[0044] During construction, the connecting plate 1 is usually connected to the inside of the grid shell, that is, the side of the grid shell close to the ground. Due to the large surface area of ​​the connecting plate 1, the stress at the connection node between the tie rod and the wooden structure is dispersed, thereby improving the strength and stability of the grid shell structure.

[0045] Optionally, the tie rod includes a plurality of the fixing units. A tie rod includes a plurality of the fixing units, so that the tie rod can be stably fixed on the lattice shell; and different numbers of fixing units can be suitable for different installation positions of the lattice shell, for example, a tie rod with four fixing units can be used at a cross intersection position, and a tie rod with three fixing units can be used at a T-shaped intersection position.

[0046] Optional, such as Figure 1 and Figure 2 As shown, the pull rod includes four fixing units; the adjustment unit includes a connecting seat 3, one end of the connecting rod 2 of each fixing unit is connected to the connecting seat 3, and the other end is connected to a corresponding connecting plate 1; the four connecting rods 2 are evenly distributed on the connecting seat 3 along the circumference of the connecting seat, and the lengths of the connecting rods 2 at relative positions are equal; the angle A between the connecting rod 2 and the central axis of the connecting seat 3 satisfies 0°<A<90°, and the angles between the connecting rods 2 and the central axis at relative positions are equal. The central axis and Figure 2 The axes of the adjusting screws 5 are in the same straight line.

[0047] Since the grid shell on site is usually composed of multiple sets of main beams and secondary beams, two opposite connecting plates 1 are fixed on the same beam, such as Figure 6 As shown, two shorter connecting rods 2 are fixed on the main beam, and two longer connecting rods 2 are fixed on the secondary beam. The outward angle A of the connecting rod 2 and the length of the connecting rod 2 can be specifically designed according to the shape of the lattice shell structure and actual needs.

[0048] Optional, such as Figure 1 and Figure 2 As shown, the connecting plate 1 is a square plate, and the square plate is provided with through holes for fixing. The square plate is easy to process, and a through hole for fixing can be provided at each of the four corners of the square plate, and high-strength screws can be used to pass through the through holes on the connecting plate 1, thereby connecting the connecting plate 1 to the wooden structure grid shell.

[0049] Optional, such as Figure 1 As shown, the connection seat 3 is in the shape of a quadrangular pyramid. The four corners of the quadrangular pyramid can be conveniently connected to four connection rods 2.

[0050] Optional, such as Figure 1 and Figure 2 As shown, the connecting plate 1 is connected to the connecting rod 2 by welding, and the connecting rod 2 is connected to the connecting seat 3 by threads. The connecting rod 2 and the connecting seat 3 are detachably connected by threads, which makes it convenient to separate packaging and transportation. Figure 2 As shown, four studs may be provided on the upper portion of the quadrangular pyramid-shaped connecting seat 3 , and the studs are used to connect the internal threads in the connecting rod 2 .

[0051] Optional, such as Figure 1 and Figure 2 As shown, the adjustment unit further includes an adjustment nut 4 and an adjustment screw 5; the connection seat 3 is provided with a through threaded hole along the direction of the central axis; one end of the adjustment screw 5 passes through one end of the threaded hole and is connected to the adjustment nut 4, and the other end of the adjustment screw 5 passes through the other end of the threaded hole and is connected to the cable passing unit. A washer 6 is usually installed below the adjustment nut 4 to prevent loosening.

[0052] The tension of the cable can be continuously adjusted by adjusting the nut 4 and the adjusting screw 5. In other embodiments, the adjusting unit can also adjust the tension of the cable by means of a buckle or a through hole and a latch.

[0053] Optional, such as Figure 1 and Figure 3 As shown, the cable passing unit includes a first cable passing component 7, a connecting screw 8 and a second cable passing component 9; one end of the first cable passing component 7 is connected to the other end of the adjusting screw 5, and the other end of the first cable passing component 7 is connected to one end of the connecting screw 8; the other end of the connecting screw 8 is connected to one end of the second cable passing component 9; the first cable passing component 7 and the second cable passing component 9 are both provided with a cable passing hole 10 for passing the cable and a glue injection hole 11 for injecting structural glue; the lengths of the adjusting screw 5 and the connecting screw 8 are equal to or greater than a preset threshold value, so that the other end of the adjusting screw 5 contacts the cable in the first cable passing component 7 and generates an extrusion force, and the other end of the connecting screw 8 contacts the cable in the second cable passing component 9 and generates an extrusion force. Among them, the glue injection hole 11 can be set on two opposite surfaces of the cable passing component. One end of each component in the figure refers to the upper end, and the other end refers to the lower end.

[0054] In this embodiment, the connecting screw 8 is connected to the first cable passing component 7 and the second cable passing component 9 through threads, and a cable passes through each of the first cable passing component 7 and the second cable passing component 9. The two cables are on two planes, so that the upper and lower layers of cables can be installed at the same time, which improves the construction efficiency. After the cable is installed in place, structural glue, such as Hilti HIT-RE 500v3 (Hilti) epoxy resin structural glue, is injected into the cable passing component from the glue injection hole 11, so that the cable and the cable passing component can be kept in a tight state for a long time.

[0055] In other embodiments, the first cable passing component 7 and the second cable passing component 9 may be integrated, a top screw may be provided on the side wall of the cable passing component, and the cable in the cable passing component may also be fixed by the top screw and structural adhesive.

[0056] Optional, such as Figure 1 and Figure 4As shown, the outer wall of the connecting screw 8 is provided with a slot 12 for rotation and fixing. In the later stage of construction, the connecting screw 8 needs to be fastened with the first cable passing component 7 and the second cable passing component 9, and the other end of the connecting screw 8 contacts the cable in the second cable passing component 9 and generates an extrusion force, so that the cable in the second cable passing component 9 is fixed.

[0057] Optionally, the pull rod is made of stainless steel. Using stainless steel can increase the service life of the product.

[0058] Based on the same technical concept as the above-mentioned pull rod for tensioning a cable, the present invention also provides a method for using the pull rod for tensioning a cable, the method comprising:

[0059] Pass the cable through the pull rod described above;

[0060] fixing the tie rod to the building structure;

[0061] Fixing both ends of the cable;

[0062] The distance between the cable passing unit and the building structure is adjusted by the adjusting unit so that the tension of the cable reaches a preset threshold;

[0063] The pull cable is fixed to the pull rod.

[0064] The present invention provides a method for using a pull rod for tensioning a cable. Since the pull rod includes an adjusting unit, the adjusting unit can adjust the distance between the cable passing unit and the building structure, so that the length of the pull rod can be adjusted; the cable can move relative to the building structure along with the cable passing unit, and the tension of the cable also changes during the change of the length of the pull rod. In this way, the installation of the pull rod and the cable can be adjusted on site, thereby improving the construction efficiency of the cable net.

[0065] against Figure 1 The pull rod and a specific construction project shown in the figure, the method for using the pull rod specifically includes the following steps:

[0066] S1: Use building simulation software to calculate the cutting length of each cable and the connection nodes between the cable and the pull rod, mark the node positions on the cable, arrange multiple sets of first cable passing components 7 and second cable passing components 9 to the marked positions on the cable, and temporarily fix the first cable passing components 7 and second cable passing components 9 with cable ties or ropes; arrange two layers of cables according to the conditions of the construction site, and take temporary fixing measures to fix the cables on the glued wood structure grid shell; install the two ends of the cable, and connect the two ends of the cable to the embedded anchor bolts in the concrete structure through adjustable bolts, and the concrete structure is located below the grid shell;

[0067] S2: Screw four stainless steel claws (i.e., connecting rods 2) onto the main casting (i.e., connecting seat 3) to form a support assembly, and use screws to pass through the holes on the four steel plates to fix the support assembly to the main and secondary glulam beams;

[0068] S3: Reference Figure 5 As shown, screw the connecting screw 8 into the upper and lower cable-passing components (i.e., the first cable-passing component 7 and the second cable-passing component 9), screw the adjusting screw 5 (which can be an M56 screw) into the first cable-passing component 7 (after screwing into the first cable-passing component 7, ensure that the bidirectional cable can slide freely); pass the M56 screw through the support assembly, screw on the adjusting nut 4 (which can be an M56 nut) and the washer 6, and only tighten the adjusting nut 4 until the adjusting nut 4 is engaged with the thread of the adjusting screw 5. At this time, there can be 100 mm of exposed thread between the support assembly and the first cable-passing component 7;

[0069] S4: Tighten the adjustable bolts at the connection between the bottom of the cable (i.e. both ends) and the embedded anchor bolts to the calculated preset length, so that the initial tension of the cable is about 5kN;

[0070] S5: Starting from the center of the dome, tighten the M56 nut and gradually pull the cable toward the glued wood; tighten the M56 nut point by point from the center to the outside, that is, tension the cable point by point, for example, until the exposed screw length is about 50mm; the process of tightening the exposed screw length from 100mm to 50mm can be done in one go or in multiple times; during the tightening process, use a cable tension tester to test each part of the cable and compare and analyze it with the construction simulation calculation results;

[0071] S6: Reference Figure 6 As shown, after completing the first round of tensioning, follow the same steps starting from the center of the dome to complete the second round of tensioning of the M56 nut. At this time, the tension of the cable reaches 40kN±5kN;

[0072] S7: The connecting screw 8 is rotated through the groove 12 on the connecting screw 8 to fix the lower cable passing component, and the lower end surface of the connecting screw 8 presses the lower layer cable tightly to fix the lower layer cable in place;

[0073] S8: Inject Hilti HIT-RE 500v3 epoxy resin structural adhesive into each cable-passing component; the epoxy resin structural adhesive should flow in from one filling hole and out from the other filling hole to verify whether the node is fully filled;

[0074] S9: Use the cable tension tester to test each part of the cable and compare it with the simulation calculation results. If the difference is large, adjustment is required; if it is within the qualified range, the construction is terminated.

[0075] In summary, the present invention provides a pull rod for tensioning cables and a method of using the same. Since the pull rod includes an adjustment unit, the adjustment unit can adjust the distance between the cable passing unit and the building structure, so that the length of the pull rod can be adjusted; the cable can move relative to the building structure along with the cable passing unit, and the tension of the cable also changes during the change of the length of the pull rod, so that the installation of the pull rod and the cable can be adjusted on site, thereby improving the construction efficiency of the tensioning cable net. Since the surface area of ​​the connecting plate is large, the stress at the connection node position between the pull rod and the wooden structure is dispersed, thereby improving the strength and stability of the lattice shell structure. The connecting rod and the connecting seat are detachably connected by threads, which can be conveniently packaged and transported separately.

[0076] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art based on the above disclosure shall fall within the scope of protection of the claims of the present invention.

Claims

1. A tension rod for tensioning a cable, characterized in that: The pull rod comprises a fixing unit, an adjusting unit and a cable passing unit; The fixing unit is used to be fixed on the building structure; The adjusting unit is disposed between the fixing unit and the cable passing unit, and the adjusting unit is used to adjust the distance between the cable passing unit and the building structure; The cable passing unit is used to insert the cable; The adjustment unit includes a connecting seat; The adjusting unit further comprises an adjusting nut and an adjusting screw; the connecting seat is provided with a through threaded hole along the direction of its axis; one end of the adjusting screw passes through one end of the threaded hole and is connected to the adjusting nut, and the other end of the adjusting screw passes through the other end of the threaded hole and is connected to the cable passing unit; The cable passing unit comprises a first cable passing component, a connecting screw and a second cable passing component; One end of the first cable-passing component is connected to the other end of the adjusting screw, and the other end of the first cable-passing component is connected to one end of the connecting screw; the other end of the connecting screw is connected to one end of the second cable-passing component; The first cable passing component and the second cable passing component are both provided with a cable passing hole for passing the cable and a glue injection hole for injecting structural glue; The lengths of the adjusting screw and the connecting screw are equal to or greater than a preset threshold value, so that the other end of the adjusting screw contacts the cable in the first cable passing component and generates a squeezing force, and the other end of the connecting screw contacts the cable in the second cable passing component and generates a squeezing force; The fixing unit comprises a connecting plate and a connecting rod; The two ends of the connecting rod are respectively connected to the connecting plate and the adjusting unit; The connecting plate and the connecting rod are connected by welding; the connecting rod and the connecting seat are connected by threads.

2. A tension rod for tensioning a cable according to claim 1, characterized in that: The building structure is a wooden structure lattice shell, and the connecting plate is used to be fixed on the wooden structure lattice shell.

3. A tension rod for tensioning a cable according to claim 2, characterized in that: The pull rod includes a plurality of the fixing units.

4. A tension rod for tensioning a cable according to claim 3, characterized in that: The pull rod comprises four fixing units; one end of the connecting rod of each fixing unit is connected to the connecting seat, and the other end is connected to a corresponding connecting plate; The four connecting rods are evenly distributed on the connecting seat along the circumference of the connecting seat, and the lengths of the connecting rods at relative positions are equal; An included angle A between the connecting rod and the central axis of the connecting seat satisfies 0°<A<90°, and the included angles between the connecting rod and the central axis at relative positions are equal.

5. A tension rod for tensioning a cable according to claim 4, characterized in that: The connecting plate is a square plate, and the square plate is provided with through holes for fixing.

6. A tension rod for tensioning a cable according to claim 1, characterized in that: The outer side wall of the connecting screw is provided with a slot for rotation and fixing.

7. A method for using a tension rod for tensioning a cable, characterized in that: The method comprises: Passing the cable through the pull rod according to any one of claims 1 to 6; fixing the tie rod to the building structure; Fixing both ends of the cable; The distance between the cable passing unit and the building structure is adjusted by the adjusting unit so that the tension of the cable reaches a preset threshold; The pull cable is fixed to the pull rod.

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