Prestressed composite panel tensioning system and tensioning method

Abstract

The present invention provides a prestressed composite panel tensioning system and tensioning method. The prestressed composite panel tensioning system includes an anchor head, an anchor head traction assembly, and a tensioning assembly. One end of the anchor head traction assembly is connected to the anchor head, and the other end is away from the anchor head along the tensioning direction of the corresponding prestressed composite panel, forming a traction portion suitable for traction. The tensioning assembly includes a tensioning seat, a guide member provided on the tensioning seat, and a tensioning cable suitable for passing through and winding between the anchor head traction assembly and the guide member. The guide member is arranged opposite to the anchor head traction assembly. One end of the tensioning cable is suitable for connection to a tensioning traction machine, and the other end passes through the tensioning seat, is sequentially passed through the corresponding anchor head traction assembly and the guide member, and is then fixed to the tensioning seat. The tensioning method is implemented by the prestressed composite panel tensioning system. The prestressed composite panel tensioning system and tensioning method provided by the present invention can achieve narrow beam reinforcement and high-force reinforcement.

Description

Technical Field

[0001] The present invention belongs to the technical field of prestressed reinforcement, and more particularly relates to a prestressed composite material plate tensioning system and tensioning method. Background Art

[0002] Prestressed composite panels, such as prestressed carbon fiber reinforced plastics (CFRP), are widely used in the reinforcement of bridges, highways, and civil engineering projects. Combining prestressing technology with adhesive reinforcement techniques on non-prestressed structural components can effectively increase the structure's load-bearing capacity and effectively control the development of defects in existing components.

[0003] However, there are still many problems in the actual engineering application of prestressed composite plate reinforcement systems. For example, when the space required for prestressed reinforcement is narrow, prestressing and anchoring cannot be constructed due to space limitations; the actual reinforced bridge components often require prestressing with higher force values, while the prestress that most prestressed CFRP systems can provide is very limited, and in many cases it is difficult to meet engineering needs.

[0004] In order to significantly improve the bearing capacity of the reinforced structure, it is necessary to tension and anchor multiple layers of prestressed composite panels. However, the existing anchor structure is complex and the tensioning operation process is cumbersome. The tensioning force value and the reinforcement force value are equal. The anchor is also inconvenient to arrange due to the limited space at the bottom of the beam. Summary of the Invention

[0005] The object of the present invention is to provide a prestressed composite material plate tensioning system and tensioning method, which utilizes the movable pulley principle and adopts the form of tensioning cables to achieve prestressing of 100% of the design force value by tensioning 50% of the design force value.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] In a first aspect, a prestressed composite material plate tensioning system is provided, comprising:

[0008] Anchor heads, suitable for clamping and anchoring both ends of the prestressed composite material plate to be tensioned;

[0009] An anchor head pulling assembly, one end of which is adapted to be connected to the anchor head, and the other end of which is away from the anchor head along the tensioning direction of the corresponding prestressed composite material plate and forms a pulling portion suitable for pulling; and

[0010] A tensioning assembly, the tensioning assembly comprising a tensioning seat and a guide member provided on the tensioning seat, and a tensioning cable adapted to be passed through and wound between the anchor head pulling assembly and the guide member; wherein the guide member is arranged opposite to the anchor head pulling assembly;

[0011] Among them, one end of the tensioning cable is suitable for being connected to a tensioning traction machine, and the other end is suitable for passing through the tensioning seat and then passing through the corresponding anchor head traction assembly and guide member in sequence and then being fixed on the tensioning seat. The traction machine retracts the tensioning cable and applies tensioning prestress to the prestressed composite material plate.

[0012] Compared with the prior art, the solution shown in the embodiment of the present application can anchor the anchor head at the end of the prestressed composite material plate, and when the traction machine applies traction to the tensioning cable, the tensioning cable can be tensioned between the traction part and the guide member of the anchor head traction assembly to achieve tensioning of the prestressed composite material plate; and, a movable pulley structure is formed between the tensioning cable, the traction part and the guide member of the anchor head traction assembly provided in the present application, and when the traction machine applies traction to the tensioning cable, the prestressed composite material plate can be prestressed with twice the traction force, thereby achieving a reinforcement effect of high tension value by applying a lower traction force by the traction machine; in addition, the tensioning system adopted in the present application can connect the guide member and the anchor head traction assembly through the tensioning cable, which is convenient for reinforcing narrow beams in a smaller operating space.

[0013] In combination with the first aspect, in a possible implementation, the prestressed composite material plate is provided with multiple layers, a plurality of the anchor heads and a plurality of the anchor head traction assemblies are provided accordingly, and a plurality of the guide members corresponding to the anchor head traction assemblies are provided on the tensioning assembly;

[0014] When tensioning multiple layers of prestressed composite material panels, one end of the tensioning cable is connected to the traction machine, and the other end passes through the tensioning seat, and is sequentially passed through the corresponding anchor head traction assembly and guide member according to the layout order of the multiple layers of prestressed composite materials, and finally fixed on the tensioning seat. Under the action of the traction machine, each layer of prestressed composite material panel is applied with a prestress of twice the traction force.

[0015] In combination with the first aspect, in a possible implementation, the traction portion of the anchor head traction assembly is a first guide roller, a first guide rod or a first guide wheel suitable for the tensioning cable to pass through and freely slide or roll;

[0016] The guide member is provided with a guide portion suitable for the tensioning cable to pass through and freely slide or roll, and the guide portion is a second guide roller, a second guide rod or a second guide wheel.

[0017] Preferably, the axis of the first guide roller, the first guide rod or the first guide wheel is parallel to the axis of the second guide roller, the second guide rod or the second guide wheel.

[0018] In some embodiments, the anchor head pulling assembly further includes: at least two first tensioning members, one end of each of the first tensioning members being connected to or limited by the anchor head; and a first connecting member being provided corresponding to the first tensioning member, wherein one end of the first connecting member is connected to the first tensioning member, and the other end is connected to at least two ends of the first guide roller, the first guide rod, or the first guide wheel;

[0019] Wherein, an escape space suitable for avoiding the end of the anchor head and passing around the tensioning cable is formed between the first guide roller, the first guide rod or the first guide wheel and the corresponding first tensioning member by means of the first connecting member.

[0020] The first connecting member and the traction portion may not rotate, rotate only one of them, or rotate simultaneously. Specifically, the first connecting member and the traction portion may be fixedly connected, wherein the traction portion, which serves as the first guide rod, does not rotate. Alternatively, when the first connecting member is fixed, the traction portion rotates, such as the first guide roller or the first guide wheel. Alternatively, when the first connecting member rotates, the traction portion rotates simultaneously.

[0021] One end of the anchor head pulling assembly is connected to the body of the anchor head by means of a threaded connection or a position-limiting connection by means of a nut; or,

[0022] The anchor head traction assembly is connected to a baffle suitable for passing through the prestressed composite material plate. The baffle is limitedly abutted against one side of the anchor head and is used to drive the anchor head to advance along the tensioning direction.

[0023] In some embodiments, the guide member further includes: a second tensioning member, at least two of which are provided, one end of which is threadedly connected to the tensioning seat or clamped and limited; and a second connecting member, which is provided corresponding to the tensioning member, one end of the second connecting member is connected to the second tensioning member, and the other end is connected to at least two ends of the second guide roller, the second guide rod, or the second guide wheel;

[0024] Wherein, an escape space suitable for passing the tensioning cable is formed between the second guide roller, the second guide rod or the second guide wheel and the second tensioning member by means of the second connecting member.

[0025] The structure of the guide member is substantially the same as that of the anchor head pulling assembly, wherein the second connecting member and the guide portion can be non-rotatable, rotated singly or rotated simultaneously.

[0026] Exemplarily, threaded holes are provided on both sides of the anchor head, and the first tensioning member is threadedly connected to the threaded holes; or light holes are provided on both sides of the anchor head, and the first tensioning member is suitable for passing through the light holes on the anchor head and connected to the anchor head by means of nuts.

[0027] In some embodiments, when the anchor head traction assembly is connected to the anchor head via a baffle, light holes or threaded holes are provided on both sides of the baffle, and one end of the anchor head traction assembly is connected to the baffle via threads or via a nut.

[0028] Exemplarily, the first tensioning member is connected to a baffle suitable for passing through the prestressed composite material plate, and the baffle is limitedly abutted against one side of the anchor head and is used to drive the anchor head to advance along the tensioning direction;

[0029] Wherein, both sides of the baffle are provided with light holes or threaded holes, and one end of the first tensioning member is connected to the baffle by means of threads or by means of a nut.

[0030] Exemplarily, during tensioning, the guide member is disposed corresponding to the anchor head traction assembly in a direction of the tensioning seat perpendicular to the reinforced structure, or is disposed respectively correspondingly between adjacent anchor head traction assemblies.

[0031] In combination with the first aspect, in a possible implementation, the tensioning seat includes:

[0032] a fixing plate adapted to be detachably fixed to the member to be reinforced;

[0033] A vertical support side plate is provided on the fixed plate, and one or more guide members are connected to the vertical support side plate;

[0034] Support ribs, provided on the fixed plate and connected to the vertical support side plates;

[0035] The traction machine is arranged on a fixed plate or on a side away from the prestressed composite material plate, and a smooth through hole suitable for the tensioning cable to pass through is provided on the vertical support side plate.

[0036] In a second aspect, the present application further provides a prestressed composite material plate tensioning method, characterized in that it comprises the following steps:

[0037] S1. A tensioning system constructed based on the movable pulley principle, the tensioning system comprising a plurality of anchor heads, a plurality of anchor head traction assemblies, a tensioning seat and a plurality of guide members provided on the tensioning seat;

[0038] The anchor head is arranged at the tensioning end of the prestressed composite material, and the anchor head traction assembly is connected to the anchor head, and the tensioning seat is installed corresponding to the anchor head, so that the guide member and the anchor head traction assembly are arranged opposite to each other, wherein the anchor head traction assembly is suitable for passing through the tensioning cable, and the guide member is used to change the direction of the tensioning cable;

[0039] S2. Tensioning cable: one end of the tensioning cable is connected to a traction machine for tensioning, the other end passes through the tensioning seat, and in accordance with the arrangement order of the multi-layer prestressed composite material, the anchor head traction assembly and the guide member are passed through the corresponding arrangement order, and finally fixed to the tensioning seat;

[0040] S3. Start the traction machine and use 50% of the preset prestressing value as the traction force to tension the tensioning cables, thereby forming a coordinated tensioning of the multi-layer prestressed composite material plate.

[0041] The tensioning method provided in the present application has all the beneficial effects of the above-mentioned prestressed composite material plate tensioning system because it is constructed based on the principle of a movable pulley. It can apply a lower traction force through a traction machine to achieve a reinforcement effect with a high tensioning force value, and it is convenient to realize the reinforcement of narrow beams in a smaller operating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0043] Figure 1 A schematic structural diagram of a prestressed composite material plate tensioning system provided in an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of a connection structure of an anchor head and an anchor head traction assembly provided in an embodiment of the present invention;

[0045] Figure 3 A schematic structural diagram of a guide member provided in an embodiment of the present invention;

[0046] Figure 4 A schematic structural diagram of a tensioning seat provided in an embodiment of the present invention;

[0047] Figure 5 Another structural schematic diagram of a guide member provided in an embodiment of the present invention;

[0048] Figure 6 Another structural schematic diagram of a tensioning seat provided in an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of another connection structure of the anchor head and the anchor head traction assembly provided by an embodiment of the present invention.

[0050] In the picture:

[0051] 1. Anchor head;

[0052] 2. Anchor head traction assembly; 21. Traction unit; 22. First tensioning member; 23. First connecting member;

[0053] 3. Tensioning assembly; 31. Tensioning seat; 311. Fixing plate; 312. Vertical support side plate; 3121. Slide groove; 3122. Through hole; 313. Support rib; 32. Guide member; 321. Guide portion; 322. Second tensioning member; 3221. Slider; 323. Second connecting member; 33. Tensioning cable;

[0054] 4. Traction machine;

[0055] 5. Prestressed composite panels;

[0056] 6. Avoidance space

[0057] 7. Baffle. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0059] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “back”, “top”, “bottom”, “inside”, “outside”, etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0061] Please also refer to Figures 1 to 7 Now, the prestressed composite material plate tensioning system and tensioning method provided by the present invention are described.

[0062] In this embodiment, the prestressed composite panel tensioning system includes an anchor head 1, an anchor head traction assembly 2, and a tensioning assembly 3. The anchor head 1 is adapted to clamp and anchor the two ends of the prestressed composite panel 5 to be tensioned. One end of the anchor head traction assembly 2 is adapted to be connected to the anchor head 1, while the other end is directed away from the anchor head 1 in the tensioning direction of the corresponding prestressed composite panel 5, forming a traction portion 21 adapted to pull the panel. The tensioning assembly 3 includes a tensioning seat 31, a guide 32 disposed on the tensioning seat 31, and a tensioning cable 33 adapted to be threaded between the anchor head traction assembly 2 and the guide 32. The guide 32 is disposed opposite the anchor head traction assembly 2. The tensioning cable 33 has one end adapted to be connected to a tensioning traction machine 4, and the other end passes through the tensioning seat 31, is sequentially threaded through the corresponding anchor head traction assembly 2 and the guide 32, and is then fixed to the tensioning seat 31. Under the action of the traction machine 4, the prestressed composite panel 5 is prestressed with twice the tensioning force.

[0063] It should be understood that the prestressed composite material plate tensioning system used in this application adopts the principle of a movable pulley. When the traction machine 4 applies traction, the tensioning cables 33 on the upper and lower sides of the traction part 21 of the anchor head traction assembly 2 are respectively applied with one times the traction force, so that the final force applied to the anchor head 1 is twice the traction force, thereby applying a prestress of twice the traction force to the prestressed composite material plate 5.

[0064] Optionally, the traction machine 4 used in the present application realizes the tensioning of the tensioning cable 33 through the traction wheel, one end of the tensioning cable 33 is passed through the traction wheel, and the traction machine 4 realizes the tensioning of the tensioning cable 33 by driving the traction wheel to rotate, thereby transmitting the traction force to the prestressed composite material plate 5 through the anchor head traction assembly 2; it should be noted that the specific structure and working principle of the traction machine 4 and the traction wheel belong to the existing technology and will not be repeated here.

[0065] Optionally, the prestressed composite material plate 5 is clamped in the anchor head 1 by means of wedges and adhesive.

[0066] Specifically, the tensioning cable 33 is made of a material with high tensile strength and has a certain degree of flexibility. It can be in the shape of a belt or a cable, and the material is preferably Kevlar fiber or polyamide fiber.

[0067] In addition, the parts to be reinforced referred to in this application may be concrete structural parts or steel structural parts, and specifically may be bridges, civil buildings and other building structures to be reinforced.

[0068] Compared to the prior art, the solution shown in the embodiment of the present application allows the anchor head 1 to be clamped to the end of the prestressed composite panel 5. When the traction machine 4 applies traction to the tensioning cable 33, the tensioning cable 33 can be tensioned between the traction portion 21 of the anchor head traction assembly 2 and the guide member 32 to achieve tensioning of the prestressed composite panel 5. Furthermore, a movable pulley structure is formed between the tensioning cable 33, the traction portion 21 of the anchor head traction assembly 2, and the guide member 32. When the traction machine 4 applies traction to the tensioning cable 33, the prestressed composite panel 5 is prestressed at twice the traction force. This allows the traction machine 4 to apply a lower traction force, achieving a high tensioning force reinforcement effect. In addition, the tensioning system used in the present application can connect the guide member 32 and the anchor head traction assembly 2 via the tensioning cable 33, facilitating the reinforcement of narrow beams within a small operating space. The embodiment of the present application can be applied to the tensioning of single-layer prestressed composite panels 5, as well as to the tensioning of multiple layers of prestressed composite panels 5.

[0069] See also Figure 1 In a possible embodiment, the prestressed composite material panel 5 is provided with multiple layers, and multiple anchor heads 1 and multiple anchor head traction assemblies 2 are provided accordingly. Multiple guide members 32 corresponding to the anchor head traction assemblies 2 are provided on the tensioning assembly 3. When tensioning the multiple layers of prestressed composite material panel 5, one end of the tensioning cable 33 is connected to the traction machine 4, and the other end passes through the tensioning seat 31. The cable is sequentially passed through the corresponding anchor head traction assemblies 2 and the guide members 32 according to the arrangement order of the multiple layers of prestressed composite materials, and finally fixed to the tensioning seat 31. Under the action of the traction machine 4, each layer of the prestressed composite material panel 5 is applied with a prestress of twice the traction force.

[0070] It should be understood that by anchoring the multi-layer prestressed composite material plate 5 , the bearing capacity of the member to be reinforced can be improved, meeting the demand for greater prestress in actual engineering.

[0071] Moreover, the tensioning cables 33 provided in the present application can be sequentially passed through the corresponding anchor head traction assemblies 2 and guide members 32 according to the arrangement order of the multi-layer prestressed composite materials. Therefore, when the traction machine 4 applies traction, double the traction force is applied to the tensioning cables 33 on the upper and lower sides of the traction part 21 of each group of anchor head traction assemblies 2, so that double the traction force is applied to each group of anchor heads 1, and each layer of prestressed composite material plate 5 is prestressed with 2 times the traction force; therefore, the prestressed composite material plate tensioning system provided in the present application can achieve a reinforcement effect of high tension value of the multi-layer prestressed composite material plate 5 by applying a lower traction force through the traction machine 4.

[0072] See also Figure 1In some possible embodiments, the traction part 21 of the anchor head traction assembly 2 is a first guide roller, a first guide rod or a first guide wheel suitable for the tensioning cable 33 to pass through and slide or roll freely; the guide member 32 is provided with a guide part 321 suitable for the tensioning cable 33 to pass through and slide or roll freely, and the guide part 321 is a second guide roller, a second guide rod or a second guide wheel.

[0073] By setting a first guide roller, a first guide rod or a first guide wheel structure, and a second guide roller, a second guide rod or a second guide wheel structure, when the traction machine 4 is tensioning, the tensioning cable 33 can slide or roll freely between the traction part 21 and the guide part 321, thereby forming a movable pulley structure to obtain a high tension force value.

[0074] See also Figure 1 In some embodiments, the axis of the first guide roller, the first guide rod or the first guide wheel is parallel to the axis of the second guide roller, the second guide rod or the second guide wheel.

[0075] Preferably, the axis of the first guide roller, the first guide rod or the first guide wheel is parallel to the axis of the second guide roller, the second guide rod or the second guide wheel.

[0076] It should be understood that when the tensioning cable 33 is tensioned between the first guide roller, the first guide rod or the first guide wheel and the second guide roller, the second guide rod or the second guide wheel, the tensioning cable 33 needs to rotate around the axis of the first guide roller, the first guide rod or the first guide wheel, and the axis of the second guide roller, the second guide rod or the second guide wheel. Therefore, by making the axes of the two parallel, interference between the upper and lower tensioning cables 33 can be avoided.

[0077] See also Figure 1 and Figure 2 In some embodiments, the anchor head traction assembly 2 further includes a symmetrically arranged first tensioning member 22 and a symmetrically arranged first connecting member 23; the two ends of the first guide roller, the first guide rod or the first guide wheel are respectively connected to one end of the first tensioning member 22 by means of the first connecting member 23, and the other end of the first tensioning member 22 is respectively connected to the two sides of the anchor head 1, forming an escape space 6 for passing through the tensioning cable 33 between the first guide roller, the first guide rod or the first guide wheel and the corresponding anchor head 1.

[0078] Furthermore, the first tensioning member 22 can be a connecting rod, connecting column, or connecting plate; the first connecting member 23 can be a rotating bearing or rotating sleeve, enabling rotational connection between the first guide roller, first guide rod, or first guide wheel and the first tensioning member 22. Of course, the first guide roller, first guide rod, or first guide wheel can also be non-rotating, as long as they have a smooth surface to reduce the sliding resistance of the tensioning cable 33. For example, the first connecting member 23 can be an L-shaped connecting member, with one end having an external thread or an internally threaded sleeve for connection to the first guide roller, first guide rod, or first guide wheel. As long as it can connect to the first guide roller, first guide rod, or first guide wheel, the first connecting member 23 and the first guide roller, first guide rod, or first guide wheel do not rotate. Alternatively, the first connecting member 23 can be fixed while the traction unit 21 rotates, such that the first guide roller or first guide wheel rotates on the first connecting member 23, to reduce friction. Alternatively, when the first connecting member 23 rotates, the traction unit 21 rotates simultaneously. The specific structure is not detailed here.

[0079] In the present application, by setting the first connecting member 23, the two ends of the first guide roller, the first guide rod or the first guide wheel can rotate relative to the first tensioning member 22, so that when the tensioning cable 33 is tensioned, the tensioning cable 33 can slide or roll freely on the first guide roller, the first guide rod or the first guide wheel.

[0080] Optionally, the first tensioning member 22 is threadedly connected to the anchor head 1 or connected via a nut. The first tensioning member 22 can be in the form of a tensioning rod or a high-strength tensioning cable. Its purpose is to securely connect the anchor head 1 so that the traction machine 4 can achieve tensioning of the prestressed composite material panel through the first tensioning member 22.

[0081] As an embodiment, threaded holes are provided on both sides of the anchor head 1, and the first tensioning member 22 is threadedly connected to the threaded holes, such as Figure 2 Alternatively, the first tensioning member 22 passes through the connecting hole and is connected to the anchor head 1 by means of a nut.

[0082] In other embodiments, the anchor head 1 may not be provided with a threaded hole, and a baffle 7 suitable for passing through the prestressed composite material plate 5 is required to be provided. The baffle 7 has light holes or threaded holes on both sides. One end of the first tensioning member 22 is connected to the baffle 7 by means of a thread or a nut. For example, please refer to Figure 7 One end of the first tensioning member 22 passes through the light hole on the baffle 7 and is connected to the anchor head 1 with the help of a nut.

[0083] See also Figure 3 or Figure 5In some embodiments, the guide member 32 also includes a symmetrically arranged second tensioning member 322 and a symmetrically arranged second connecting member 323; the two ends of the second guide roller, the second guide rod or the second guide wheel are respectively connected to one end of the second tensioning member 322 by means of the second connecting member 323, and the other end of the second tensioning member 322 is respectively connected to the tensioning seat 31, forming an avoidance space 6 for passing through the tensioning cable 33 between the second guide roller, the second guide rod or the second guide wheel and the tensioning seat 31.

[0084] Furthermore, the second tensioning member 322 can be a connecting rod, a connecting column or a connecting plate structure; the second connecting member 323 can be a rotating bearing or a rotating sleeve structure, which can realize the rotational connection between the second guide roller, the second guide rod or the second guide wheel and the second tensioning member 322.

[0085] In the present application, by setting a second connecting member 323, the two ends of the second guide roller, the second guide rod or the second guide wheel can rotate relative to the second tensioning member 322, so that when the tensioning cable 33 is tensioned, the tensioning cable 33 can slide freely on the second guide roller, the second guide rod or the second guide wheel or roll along with the second guide roller, the second guide rod or the second guide wheel.

[0086] See also Figures 3 to 6 For example, the second tensioning member 322 is threadedly connected to the tensioning seat 31; or a pair of sliding grooves 3121 are provided on the side of the tensioning seat 31 facing the anchor head 1, and correspondingly, a slider 3221 cooperating with the sliding groove 3121 is provided at the end of the second tensioning member 322, and the second tensioning member 322 is slidably engaged with the tensioning seat 31.

[0087] Optionally, a plurality of connection holes are provided at intervals up and down on one side of the tensioning seat 31 , and the height of the second tensioning member 322 can be adjusted by connecting the second tensioning member 322 to the connection holes at different heights.

[0088] Alternatively, the height of the second tensioning member 322 can be adjusted by sliding the slider 3221 in the corresponding slide groove 3121; optionally, after the second tensioning member 322 drives the slider 3221 to slide to a preset position, the slider 3221 can be limited on the tensioning seat 31 by a limit screw.

[0089] See also Figure 1 For example, during tensioning, the guide member 32 is arranged at the height of the tensioning seat 31 corresponding to the anchor head traction assembly 2.

[0090] For example, during tensioning, the guide members 32 are respectively arranged between adjacent anchor head traction assemblies 2 at the height of the tensioning seat 31 .

[0091] By arranging the guide member 32 at the height of the tensioning seat 31 in correspondence with the anchor head pulling assembly 2, or arranging the guide member 32 at the height of the tensioning seat 31 in correspondence between adjacent anchor head pulling assemblies 2, the tensioning cables 33 on the upper and lower sides of the same guide member 32 can be subjected to symmetrical and balanced forces, and the forces at various locations on the tensioning cables 33 can be balanced.

[0092] In some possible embodiments, during tensioning, the traction machine 4 is fixed on the tensioning seat 31 .

[0093] Exemplarily, during tensioning, the traction machine 4 is arranged on other structural members adjacent to the tensioning seat 31 and away from one side of the prestressed composite material plate 5 .

[0094] Furthermore, the traction machine 4 can be arranged at the same height as the prestressed composite material plate 5; optionally, the traction machine 4 can also be arranged at a different height from the prestressed composite material plate 5; the position and height of the traction machine 4 can be selected according to actual needs.

[0095] See also Figure 4 and Figure 6 In some possible embodiments, the tensioning seat 31 includes a fixed plate 311, a vertical support side plate 312 and a support rib 313; the fixed plate 311 is suitable for being fixed on the member to be reinforced; the vertical support side plate 312 is arranged on the fixed plate 311, and one or more guide members 32 are connected to the vertical support side plate 312; the support rib 313 is arranged on the fixed plate 311 and is connected to the vertical support side plate 312; wherein, a through hole 3122 suitable for the tensioning cable 33 to pass through is provided on the vertical support side plate 312.

[0096] The fixing plate 311 is used to facilitate fixing the tensioning seat 31 on the part to be reinforced, and the vertical support side plate 312 is used to facilitate the setting of the above-mentioned second tensioning member 322, the second connecting member 323 and the guide member 32; the support rib 313 is used to stably support the vertical support side plate 312 to ensure the stability of the tensioning seat 31.

[0097] Optionally, two groups of support ribs 313 are provided, and the two groups of support ribs 313 are symmetrically arranged on both sides of the clearance hole.

[0098] In a second aspect, the present application further provides a method for tensioning a prestressed composite material plate 5, characterized in that it comprises the following steps:

[0099] S1. A tensioning system is constructed based on the movable pulley principle. The tensioning system comprises a plurality of anchor heads 1, a plurality of anchor head traction assemblies 2, a tensioning seat 31, and a plurality of guide members 32 provided on the tensioning seat 31;

[0100] An anchor head 1 is provided at the tensioning end of the prestressed composite material, and an anchor head traction assembly 2 is connected to the anchor head 1. A tensioning seat 31 is installed corresponding to the anchor head 1, so that a guide 32 is arranged opposite to the anchor head traction assembly 2. The anchor head traction assembly 2 is suitable for passing through a tensioning cable 33, and the guide 32 is used to change the direction of the tensioning cable 33.

[0101] S2. Wearing the tensioning cable 33: One end of the tensioning cable 33 is connected to a traction machine 4 for tensioning, and the other end passes through the tensioning seat 31. In accordance with the arrangement order of the multi-layer prestressed composite material, the corresponding anchor head traction assembly 2 and the guide member 32 are passed through and finally fixed to the tensioning seat 31;

[0102] S3. Start the traction machine 4 and use 50% of the preset prestress value as the traction force to tension the tension cable 33, thereby forming a coordinated tensioning of the multi-layer prestressed composite material plate 5.

[0103] Furthermore, before tensioning the tensioning cable 33 , it is necessary to remove any interferences near the prestressed composite material plate 5 and confirm that the guide member 32 is arranged corresponding to the anchor head traction assembly 2 at the height of the tensioning seat 31 or is respectively arranged between adjacent anchor head traction assemblies 2 .

[0104] The tensioning method provided in the present application has all the beneficial effects of the above-mentioned prestressed composite material plate tensioning system because it is constructed based on the principle of a movable pulley. A lower traction force can be applied by the traction machine 4 to achieve a reinforcement effect with a high tensioning force value, and it is convenient to realize the reinforcement of narrow beams in a smaller operating space.

[0105] In combination with the second aspect, in a possible implementation, the traction machine 4 in S2 is installed on the tensioning seat 31 , or is arranged on other structural members adjacent to the tensioning seat 31 and away from one side of the prestressed composite material plate 5 .

[0106] It should be noted that the position and height of the tractor 4 can be selected according to actual needs.

[0107] 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 scope of protection of the present invention.

Claims

1. A prestressed composite material plate tensioning system, characterized in that: include: Anchor heads, suitable for clamping and anchoring both ends of the prestressed composite material plate to be tensioned; An anchor head pulling assembly, one end of which is adapted to be connected to the anchor head, and the other end of which is away from the anchor head along the tensioning direction of the corresponding prestressed composite material plate and forms a pulling portion suitable for pulling; and A tensioning assembly, the tensioning assembly comprising a tensioning seat and a guide member provided on the tensioning seat, and a tensioning cable adapted to be passed through and wound between the anchor head pulling assembly and the guide member; wherein the guide member is arranged opposite to the anchor head pulling assembly; Wherein, one end of the tensioning cable is suitable for being connected to a tensioning traction machine, and the other end is suitable for passing through the tensioning seat and sequentially passing through the corresponding anchor head traction assembly and guide piece before being fixed on the tensioning seat, and the traction machine retracts the tensioning cable and applies tensioning prestress to the prestressed composite material plate; the prestressed composite material plate is arranged in multiple layers, and a plurality of the anchor heads and a plurality of the anchor head traction assemblies are correspondingly arranged, and a plurality of the guide pieces corresponding to the anchor head traction assemblies are arranged on the tensioning assembly; when tensioning multiple layers of prestressed composite material plates, one end of the tensioning cable is connected to the traction machine, and the other end passes through the tensioning seat and sequentially passes through the corresponding anchor head traction assembly and guide piece according to the arrangement order of the multiple layers of prestressed composite materials, and finally is fixed on the tensioning seat.

2. The prestressed composite material plate tensioning system according to claim 1, characterized in that: The traction part of the anchor head traction assembly is a first guide roller, a first guide rod or a first guide wheel suitable for the tensioning cable to pass through and freely slide or roll; The guide member is provided with a guide portion suitable for the tensioning cable to pass through and freely slide or roll, and the guide portion is a second guide roller, a second guide rod or a second guide wheel.

3. The prestressed composite material plate tensioning system according to claim 2, characterized in that: The axis of the first guide roller, the first guide rod or the first guide wheel is parallel to the axis of the second guide roller, the second guide rod or the second guide wheel.

4. The prestressed composite material plate tensioning system according to claim 1, characterized in that: One end of the anchor head pulling assembly is connected to the body of the anchor head by means of a threaded connection or a position-limiting connection by means of a nut; or, The anchor head traction assembly is connected to a baffle suitable for passing through the prestressed composite material plate. The baffle is limitedly abutted against one side of the anchor head and is used to drive the anchor head to advance along the tensioning direction.

5. The prestressed composite material plate tensioning system according to claim 2, characterized in that: The anchor head pulling assembly also includes: At least two first tensioning members are provided, one end of each of the first tensioning members being connected to or limited by the anchor head; and a first connecting member, disposed corresponding to the first tensioning member, wherein one end of the first connecting member is connected to the first tensioning member, and the other end is connected to at least two ends of the first guide roller, the first guide rod, or the first guide wheel; Wherein, an escape space suitable for avoiding the end of the anchor head and passing around the tensioning cable is formed between the first guide roller, the first guide rod or the first guide wheel and the corresponding first tensioning member by means of the first connecting member.

6. The prestressed composite material plate tensioning system according to claim 5, characterized in that: Threaded holes are provided on both sides of the anchor head, and the first tensioning member is threadedly connected to the threaded holes; or light holes are provided on both sides of the anchor head, and the first tensioning member is suitable for passing through the light holes on the anchor head and connected to the anchor head by means of nuts.

7. The prestressed composite material plate tensioning system according to claim 4, characterized in that: When the anchor head pulling assembly is connected to the anchor head via a baffle, light holes or threaded holes are provided on both sides of the baffle, and one end of the anchor head pulling assembly is connected to the baffle via threads or via a nut.

8. The prestressed composite material plate tensioning system according to claim 5, characterized in that: The first tensioning member is connected to a baffle suitable for passing through the prestressed composite material plate, and the baffle is limitedly abutted against one side of the anchor head and is used to drive the anchor head to advance along the tensioning direction; Wherein, both sides of the baffle are provided with light holes or threaded holes, and one end of the first tensioning member is connected to the baffle by means of threads or by means of a nut.

9. The prestressed composite material plate tensioning system according to claim 2, characterized in that: The guide member further comprises: At least two second tensioning members are provided, one end of each second tensioning member is threadedly connected to the tensioning seat or is clamped and limited; and a second connecting member, arranged corresponding to the tensioning member, wherein one end of the second connecting member is connected to the second tensioning member, and the other end is connected to at least two ends of the second guide roller, the second guide rod or the second guide wheel; Wherein, an escape space suitable for passing the tensioning cable is formed between the second guide roller, the second guide rod or the second guide wheel and the second tensioning member by means of the second connecting member.

10. The prestressed composite material plate tensioning system according to claim 9, characterized in that: The tensioning seat is provided with a threaded hole, and the second connecting member is threadedly connected to the tensioning seat or positioned by a nut; Alternatively, a pair of slide grooves are provided on a side of the tensioning seat facing the anchor head, and correspondingly, a slider matching the slide grooves is provided at the end of the second connecting member, and the second connecting member is slidably matched with the tensioning seat.

11. The prestressed composite material plate tensioning system according to claim 1, characterized in that: The tensioning seat comprises: a fixing plate adapted to be detachably fixed to the member to be reinforced; A vertical support side plate is provided on the fixed plate, and one or more guide members are connected to the vertical support side plate; Support ribs, provided on the fixed plate and connected to the vertical support side plates; The traction machine is arranged on a fixed plate or on a side away from the prestressed composite material plate, and a smooth through hole suitable for the tensioning cable to pass through is provided on the vertical support side plate.

12. A method for tensioning a prestressed composite material plate, characterized in that: The following steps are involved: S1. A tensioning system constructed based on the movable pulley principle, the tensioning system comprising a plurality of anchor heads, a plurality of anchor head traction assemblies, a tensioning seat and a plurality of guide members provided on the tensioning seat; The anchor head is arranged at the tensioning end of the prestressed composite material, and the anchor head traction assembly is connected to the anchor head, and the tensioning seat is installed corresponding to the anchor head, so that the guide member and the anchor head traction assembly are arranged opposite to each other, wherein the anchor head traction assembly is suitable for passing through the tensioning cable, and the guide member is used to change the direction of the tensioning cable; S2. Tensioning cable: one end of the tensioning cable is connected to a traction machine for tensioning, the other end passes through the tensioning seat, and in accordance with the arrangement order of the multi-layer prestressed composite material, the anchor head traction assembly and the guide member are passed through the corresponding arrangement order, and finally fixed to the tensioning seat; S3. Start the traction machine and use 50% of the preset prestressing value as the traction force to tension the tensioning cables, thereby forming a coordinated tensioning of the multi-layer prestressed composite material plate.

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