Tensioning device for pultruded beams and tensioning line
Patent Information
- Application Number
- CN202522618899.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-09
AI Technical Summary
Existing tensioning devices are prone to causing microcracks in pultruded beam plates when applying the required tensioning force, affecting overall performance and lifespan, and cannot precisely control the tensioning force.
The system employs a combination of a lifting frame, tensioning belt, conformal mechanism, drive equipment, and limiting components. The limiting components mechanically stop the lifting frame at its maximum movement position, limiting the maximum stretch of the tensioning belt and ensuring that the tension force is within a preset range, thus preventing excessive traction that could cause micro-cracks.
It effectively prevents microcracks from being induced in pultruded beam plates due to excessive tension, ensuring structural integrity and lifespan, and simplifies the operation process, improving product stability and ease of operation.
Smart Images
Figure CN224928577U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind power equipment technology, specifically to a tensioning device and tensioning production line for a pultruded beam. Background Technology
[0002] As wind turbine blades rapidly evolve towards larger sizes and cost reduction, the main beam manufacturing process is shifting from traditional vacuum casting to pultrusion. Pultrusion enables continuous automated production of sheet metal, offering not only high efficiency but also stable control of the glass fiber content at 70%-75%. Thanks to the high uniformity of fiber arrangement, the axial tensile strength of the sheet metal can reach 2200-2500 MPa, thus providing an excellent material foundation for the beam structure.
[0003] In actual production, these high-performance pultruded sheets require precise splicing and stacking to form a complete main beam structure. To ensure structural integrity before subsequent transportation and installation, a tensioning device must be used to apply sufficient tension force to the stacked sheets, ensuring that the interlayer gaps between each layer meet design requirements. However, the tensioning devices in related technologies are prone to causing micro-cracks in the sheets during the application of the required tension force, thus affecting the overall performance and lifespan of the pultruded beam. Utility Model Content
[0004] This application provides a tensioning device and tensioning production line for pultruded beams, which solves the problem that tensioning devices in related technologies are prone to causing micro-cracks in the sheet material during the application of the required tensioning force.
[0005] To achieve the above objectives, the embodiments of this application disclose the following technical solutions: In a first aspect, embodiments of this application provide a tensioning device for a pultruded beam, including a lifting frame, a tensioning belt, a conforming mechanism, a driving device, and a limiting member. The lifting frame is movable along a first direction; the lifting frame has a first end and a second end disposed opposite to each other along a second direction; wherein the second direction is perpendicular to the first direction.
[0006] One end of the tensioning band is connected to the first end, and the other end of the tensioning band is connected to the second end; the conforming mechanism is located between the lifting frame and the tensioning band, and the pultruded beam to be tensioned is installed between the tensioning band and the conforming mechanism and supported on the tensioning band; the driving device is used to drive the lifting frame to move relative to the conforming mechanism in a first direction; the lifting frame has a maximum movement position relative to the conforming mechanism; the limiting member is used to limit the lifting frame to move away from the conforming mechanism at the maximum movement position.
[0007] This design allows for mechanical stopping of the lifting frame at its maximum movement position via limiting components, thus fixing the lifting frame's travel distance and directly constraining the maximum tension of the tensioning band. This ensures that the clamping force exerted by the tensioning band on the pultruded beam is limited to a preset range, preventing excessive tension caused by over-traction in the drive equipment. This effectively prevents micro-cracks from being induced in the pultruded beam sheet due to excessive tension, thereby guaranteeing the structural integrity and lifespan of the pultruded beam after tensioning.
[0008] In addition, the limiting component provides the operator with a clear operating position, thereby simplifying related operations. Specifically, in subsequent repetitive operations, simply driving the lifting frame to the position defined by the limiting component ensures a consistent and reliable tension force. Therefore, on the one hand, product stability is ensured; on the other hand, the verification process is eliminated, making operation more convenient.
[0009] In some possible embodiments of the first aspect, the tensioning device of the pultruded beam further includes a lead screw and a lead screw nut, the lead screw nut being movably sleeved on the lead screw in the direction of gravity; the lead screw nut being fixedly connected to the lifting frame; and a driving device being used to drive the lead screw to rotate. The limiting element is located on the lead screw and on the side of the lead screw nut away from the conforming mechanism.
[0010] In some possible implementations of the first aspect, the limiting member is switchable between a fixed state and a movable state relative to the lead screw; the tensioning device of the pultruded beam includes a locking fastener; in the fixed state, the locking fastener locks the limiting member to the lead screw; in the movable state, the locking fastener disengages from the lead screw to allow the limiting member to move relative to the lead screw in a first direction.
[0011] In some possible embodiments of the first aspect, the limiting member is a nut, which is threadedly engaged with the lead screw, and the limiting member also has a threaded hole penetrating the inner and outer circumferential surfaces of the limiting member; the locking member is a bolt, which is threadedly engaged with the threaded hole; in the fixed state, the locking member abuts against the lead screw.
[0012] In some possible implementations of the first aspect, there are multiple threaded holes and multiple locking fasteners, with each threaded hole corresponding to a specific locking fastener.
[0013] In some possible implementations of the first aspect, the width of the tensioning band is greater than or equal to 70 mm and less than or equal to 75 mm.
[0014] In some possible implementations of the first aspect, the tensioning band is made of nylon.
[0015] In some possible embodiments of the first aspect, a first fixed post is provided at the first end of the lifting frame; a second fixed post is provided at the second end of the lifting frame; one end of the tensioning band is sleeved on the first fixed post, and the other end of the tensioning band is sleeved on the second fixed post.
[0016] In some possible embodiments of the first aspect, the tensioning band includes a first connecting segment, a second connecting segment, and a first tensioning segment and a second tensioning segment stacked together; one end of the first tensioning segment and one end of the second tensioning segment are connected by the first connecting segment; one end of the first tensioning segment and one end of the second tensioning segment are located on radial sides of the first fixing post, and the first connecting segment is located on the side of the first fixing post away from the first tensioning segment and the second tensioning segment; The other end of the first tensioning section is connected to the other end of the second tensioning section through a second connecting section; the other ends of the first tensioning section and the other ends of the second tensioning section are located on the radial sides of the second fixed column, and the second connecting section is located on the side of the second fixed column away from the first tensioning section and the second tensioning section; The tensioning device of the pultruded beam also includes a restraint ring, which is fixedly fitted with the first tensioning section and the second tensioning section.
[0017] In some possible implementations of the first aspect, the restraint ring is a ring-shaped metal.
[0018] Secondly, embodiments of this application also provide a tensioning production line for pultruded beams, including a plurality of tensioning devices for pultruded beams as described in any embodiment of the first aspect, wherein the plurality of tensioning devices for pultruded beams are arranged at intervals along a third direction; the third direction is perpendicular to the first direction and the second direction.
[0019] Since the pultruded beam tensioning production line provided in this embodiment includes the pultruded beam tensioning device described in any of the first aspects above, both can solve the same technical problem and achieve the same beneficial effects. Therefore, the beneficial effects of the pultruded beam tensioning production line provided in this application embodiment can be found in the beneficial effects of the pultruded beam tensioning device, and will not be repeated here.
[0020] In some possible implementations of the second aspect, the tensioning production line of the pultruded beam also includes multiple conforming plates and multiple binding members. The multiple conforming plates are arranged at intervals in the third direction, and the multiple conforming plates are set one-to-one with the multiple binding members. Each conforming plate is fixed to the pultruded beam by its corresponding binding member. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of a tensioning device for a pultruded beam provided in some embodiments of this application.
[0022] Figure 2 for Figure 1 An enlarged view of the tensioning device of the pultruded beam shown at point A, circled in the diagram.
[0023] Figure 3 for Figure 2 The diagram shows the assembly of the limiting component and the locking component in the structure shown.
[0024] Figure 4 This is a schematic diagram of the structure of a tensioning production line for a pultruded beam, provided for some embodiments of this application.
[0025] Explanation of reference numerals in the attached figures: 1. Pultruded beam tensioning device. 11. Lifting frame. 111. First end. 112. Second end. 113. First fixed post. 114. Second fixed post. 12. Tensioning belt. 121. First tensioning section. 122. Second tensioning section. 13. Conforming mechanism. 14. Drive device. 15. Limiting component. 151. Threaded hole. 16. Lead screw. 17. Lead screw nut. 18. Locking fastener. 19. Restraining ring. 100. Pultruded beam tensioning production line. 2. Conforming plate. 3. Binding component. Detailed Implementation
[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0027] In the embodiments of this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.
[0028] In the description of the embodiments of this application, the term "multiple" means two or more.
[0029] In the description of the embodiments of this application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.
[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0031] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0032] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, within ±10°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, within ±10°; “equal” includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals less than or equal to 5% of either one.
[0033] As wind turbine blades rapidly evolve towards larger sizes and higher cost-effectiveness, the main beam manufacturing process is shifting from traditional vacuum casting to pultrusion. Pultrusion enables continuous automated production of sheets, increasing production efficiency by 3-5 times compared to cast beams. Furthermore, pultrusion not only increases fiber volume content from 50%-60% in the same casting process to 70%-75%, but also saves 30% of material. In addition, in terms of performance, pultruded sheets exhibit high fiber alignment consistency, with an orientation deviation of less than 2°, and a tensile strength as high as 2200-2500 MPa, approximately 20% higher than cast beams.
[0034] In actual production, these high-performance pultruded sheets need to be precisely spliced and stacked to form a complete main beam structure. To ensure its structural integrity before subsequent transportation and installation, tensioning devices must be used to apply sufficient tension to the stacked sheets to ensure that the interlayer gaps between each layer meet the design requirements.
[0035] However, the tensioning devices in pultruded beams of related technologies are prone to causing micro-cracks in the sheet material during the application of the required tensioning force, thus affecting the overall performance and lifespan of the pultruded beam. Specifically, pultruded sheets themselves have high orientation, making them susceptible to cracking when subjected to excessive tensioning force. Furthermore, the tensioning devices in related technologies cannot precisely control the tensioning force, easily exceeding the limit when applied.
[0036] For the above technical issues, please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of the structure of a tensioning device 1 for a pultruded beam provided in some embodiments of this application. Embodiments of this application provide a tensioning device 1 for a pultruded beam, including a lifting frame 11, a tensioning band 12, a conforming mechanism 13, a driving device 14, and a limiting member 15. The lifting frame 11 is movable along a first direction A1; for example, the first direction A1 can be, but is not limited to, the direction of gravity.
[0037] The lifting frame 11 has a first end 111 and a second end 112 disposed opposite to each other along a second direction A2, wherein the second direction A2 is perpendicular to the first direction A1. One end of the tension band 12 is connected to the first end 111, and the other end of the tension band 12 is connected to the second end 112. A conforming mechanism 13 is located between the lifting frame 11 and the tension band 12, and a pultruded beam to be tensioned is installed between the tension band 12 and the conforming mechanism 13 and supported on the tension band 12. A drive device 14 is used to drive the lifting frame 11 to move relative to the conforming mechanism 13 along the first direction A1. The lifting frame 11 has a maximum movement position relative to the conforming mechanism 13. It is worth noting that the so-called maximum movement position refers to the maximum allowable movement position set by the user, rather than the maximum physical limit movement position of the lifting frame 11 relative to the conforming mechanism 13. A limiting member 15 is used to limit the movement of the lifting frame 11 away from the conforming mechanism 13 at the maximum movement position.
[0038] This configuration allows the limiting component 15 to mechanically stop the lifting frame 11 at its maximum movement position, fixing the travel distance of the lifting frame 11 and directly constraining the maximum tension of the tensioning band 12. This ensures that the clamping force exerted by the tensioning band 12 on the pultruded beam is limited to a preset range, preventing excessive tension caused by over-traction of the drive device 14. This effectively prevents micro-cracks from being induced in the pultruded beam sheet due to excessive tension, thus ensuring the structural integrity and lifespan of the pultruded beam after tensioning.
[0039] In addition, the limiting member 15 provides the operator with a clear operating position, thereby simplifying the operator's related operations. Specifically, in subsequent repetitive operations, simply driving the lifting frame 11 to the position defined by the limiting member 15 will obtain a consistent and reliable tension force. Therefore, on the one hand, product stability can be ensured; on the other hand, the verification process can be eliminated, making operation more convenient.
[0040] Please see Figure 2 , Figure 2 for Figure 1 The diagram shows an enlarged view of the tensioning device 1 of the pultruded beam circled at point A. In some embodiments, the tensioning device 1 of the pultruded beam further includes a lead screw 16 and a lead screw nut 17, the lead screw nut 17 being movably sleeved on the lead screw 16 along the direction of gravity. Exemplarily, one end of the lead screw 16 is rotatably connected to the top plate of the conformal mechanism 13.
[0041] The lead screw nut 17 is fixedly connected to the lifting frame 11. For example, the lifting frame 11 and the lead screw nut 17 can be fixedly connected by means of snap-fit, screw connection, or interference fit. The drive device 14 is used to drive the lead screw 16 to rotate. For example, the drive device 14 can be, but is not limited to, a worm gear jack, a hydraulic motor, or an electric wrench.
[0042] The limiting member 15 is provided on the lead screw 16 and located on the side of the lead screw nut 17 away from the conforming mechanism 13. With this configuration, by setting the lead screw 16 and the lead screw nut 17 sleeved on the lead screw 16, and using the drive device 14 to drive the lead screw 16 to rotate, the lead screw nut 17 can drive the lifting frame 11 to produce precise linear movement along the direction of gravity, and thus the tension of the tensioning band 12 can be controlled by the movement of the lifting frame 11.
[0043] In addition, since the limiting member 15 is located on the lead screw 16 and on the side of the lead screw nut 17 away from the conforming mechanism 13, its installation and position adjustment process is more convenient, which can effectively improve the overall ease of use of the tensioning device 1 of the pultrusion beam.
[0044] Please see Figure 1 and combined Figure 2 In some embodiments, the limiting member 15 is switchable between a fixed state and a movable state relative to the lead screw 16. The tensioning device 1 of the pultruded beam includes a locking member 18. In the fixed state, the locking member 18 locks the limiting member 15 to the lead screw 16. In the movable state, the locking member 18 disengages from the lead screw 16 to allow the limiting member 15 to move relative to the lead screw 16 along a first direction A1.
[0045] In this way, by separating the locking fastener 18 from the lead screw 16, the limiting member 15 can be moved to adjust its axial position on the lead screw 16. Once adjusted, the limiting member 15 can be locked to the lead screw 16 using the locking fastener 18, restoring the limiting member 15 to its fixed state. This allows for changing the maximum distance the lifting frame 11 can travel relative to the conforming mechanism 13, thereby adjusting the tensioning force that the tensioning device 1 of the pultruded beam can apply to accommodate the tensioning force requirements of pultruded beams of different specifications.
[0046] Please see Figure 2 and combined Figure 3 In some embodiments, the limiting member 15 is a nut, which is threadedly engaged with the lead screw 16. It is worth noting that the limiting nut can be installed on the lead screw 16 before adjusting the position of the lifting frame 11, or it can be installed on the lead screw 16 after adjusting the position of the lifting frame 11.
[0047] The limiting member 15 also has a threaded hole 151 penetrating both the inner and outer circumferential surfaces of the limiting member 15. The locking member 18 is a bolt, which is threadedly engaged with the threaded hole 151. In the fixed state, the locking member 18 abuts against the lead screw 16.
[0048] In this way, the self-locking characteristic of the threaded engagement between the limiting member 15 and the lead screw 16, along with the additional frictional force generated by the bolt stop, can securely lock the limiting member 15 in the set position of the lead screw 16. This reliably restricts the movement of the lifting frame 11 away from the conforming mechanism 13, ensuring that the tensioning force does not exceed the preset upper limit, thereby preventing the pultruded beam from developing micro-cracks due to excessive stress during tensioning.
[0049] Of course, this application is not limited to this. In other embodiments, the limiting member 15 may also be a sleeve. In still other embodiments, the limiting member 15 may also be the clamp body of a clamp, and the locking member 18 may be the locking structure of the clamp.
[0050] Please see Figure 3 , Figure 3 for Figure 2 The diagram shows the assembly of the limiting member 15 and the locking member 18 in the structure shown. In some embodiments, there are multiple threaded holes 151 and multiple locking members 18, with each threaded hole 151 corresponding to a different locking member 18. This allows multiple locking members 18 to simultaneously provide a fastening effect at multiple positions between the limiting member 15 and the lead screw 16, thereby enhancing the limiting member 15's ability to resist slippage in the fixed state. This more reliably confines the lifting frame 11 to its maximum movement position.
[0051] Please return to the reference. Figure 1In some embodiments, the first end 111 of the lifting frame 11 is provided with a first fixing post 113; the second end 112 of the lifting frame 11 is provided with a second fixing post 114. Exemplarily, the central axes of the first fixing post 113 and the second fixing post 114 may be, but are not limited to, perpendicular to both the first direction A1 and the second direction A2.
[0052] One end of the tension band 12 is fitted onto the first fixed post 113. The other end of the tension band 12 is fitted onto the second fixed post 114.
[0053] In this way, the clear and stable physical mounting points provided by the first fixed post 113 and the second fixed post 114 can be used to achieve rapid alignment and completion of the connection operation between the tensioning band 12 and the lifting frame 11. This simplifies the assembly process and improves assembly efficiency.
[0054] Of course, this application is not limited to this. In other embodiments, the first end 111 of the lifting frame 11 may be provided with a first clamping mechanism, and the second end 112 of the lifting frame 11 may be provided with a second clamping mechanism. The lifting frame 11 clamps the two ends of the tension band 12 through the first clamping mechanism and the second clamping mechanism, respectively. In still some embodiments, the two ends of the tension band 12 may be directly fixedly connected to the first end 111 and the second end 112 of the lifting frame 11 by means of bolt connection, snap-fit, or other methods.
[0055] Please see Figure 1 In some embodiments, the tensioning band 12 includes a first connecting segment (not shown in the figure), a second connecting segment (not shown in the figure), and a first tensioning segment 121 and a second tensioning segment 122 stacked together. One end of the first tensioning segment 121 is connected to one end of the second tensioning segment 122 through the first connecting segment.
[0056] One end of the first tensioning section 121 and one end of the second tensioning section 122 are located on the radial sides of the first fixing post 113. The first connecting section is located on the side of the first fixing post 113 away from the first tensioning section 121 and the second tensioning section 122.
[0057] The other end of the first tensioning section 121 is connected to the other end of the second tensioning section 122 via a second connecting section. The other ends of the first tensioning section 121 and the other ends of the second tensioning section 122 are located on the radial sides of the second fixing post 114. The second connecting section is located on the side of the second fixing post 114 away from the first tensioning section 121 and the second tensioning section 122.
[0058] The tensioning device 1 of the pultruded beam also includes a restraining ring 19, which is fixedly sleeved on the first tensioning section 121 and the second tensioning section 122. This arrangement, by fixing the restraining ring 19 onto the stacked first and second tensioning sections 121 and 122, tightly binds the first and second tensioning sections 121 and 122 into a single unit, effectively preventing relative slippage between them. This improves the structural stability and fatigue resistance of the tensioning band 12. Consequently, the tensioning band 12 is less prone to damage during cyclic loading, thus extending its service life and maintaining stable tension.
[0059] In some embodiments, the restraining ring 19 is a ring-shaped metal. This allows the high strength and rigidity of the metal to apply a stronger constraint to the first tensioning section 121 and the second tensioning section 122, further preventing relative slippage between them, thereby improving the shape stability and operational reliability of the tensioning band 12 during the transmission of tension force. Of course, this application is not limited to this. In other embodiments, the restraining ring 19 may also be made of plastic.
[0060] In some embodiments, the width of the tension band 12 is greater than or equal to 70 mm and less than or equal to 75 mm. For example, the width of the tension band 12 can be 70.5 mm, 71 mm, 71.5 mm, 72 mm, 72.5 mm, 73 mm, 73.5 mm, 74 mm or 74.5 mm.
[0061] This allows the tensioning band 12 to form a contact area of suitable width with the surface of the pultruded beam during tensioning, avoiding excessive local compressive stress caused by an overly narrow contact area. This effectively prevents indentations or microcracks from forming on the sheet surface due to localized stress concentration.
[0062] Of course, this application is not limited to this. In other embodiments, the width of the tension band 12 may be less than 70 mm, for example, 69 mm, 67 mm, or 65 mm. In still other embodiments, the width of the tension band 12 may be greater than 75 mm, for example, 77 mm, 79 mm, or 81 mm.
[0063] In some embodiments, the tension band 12 is made of nylon. This allows the inherent flexibility and elasticity of nylon to better conform to the profile of the pultruded beam, thereby distributing the tension force more evenly and mitigating localized stress concentration. This helps reduce the risk of microcracks in the sheet material. Of course, this application is not limited to this. In other embodiments, the tension band 12 may also be, but is not limited to, a polyester fiber strip.
[0064] Please see Figure 4This application embodiment also provides a tensioning production line 100 for pultruded beams, including a plurality of tensioning devices 1 for pultruded beams as described in any of the above embodiments, the plurality of tensioning devices 1 for pultruded beams being arranged at intervals along a third direction A3; the third direction A3 is perpendicular to the first direction A1 and the second direction A2.
[0065] Since the pultruded beam tensioning production line 100 provided in this embodiment includes the pultruded beam tensioning device 1 as described in any of the above embodiments, both can solve the same technical problem and achieve the same beneficial effects. Therefore, the beneficial effects of the pultruded beam tensioning production line 100 provided in this application embodiment can be found in the beneficial effects of the pultruded beam tensioning device 1, and will not be repeated here.
[0066] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a pultruded beam tensioning production line 100 provided for some embodiments of this application. In some embodiments, the pultruded beam tensioning production line 100 further includes a plurality of conforming plates 2 and a plurality of binding members 3, the plurality of conforming plates 2 being spaced apart on a third direction A3. Exemplarily, the plurality of conforming plates 2 and the plurality of pultruded beam tensioning devices 1 may, but are not limited to, be arranged alternately at intervals.
[0067] Multiple conformal plates 2 are configured one-to-one with multiple binding members 3, and each conformal plate 2 is fixed to the pultruded beam by its corresponding binding member 3. For example, the binding member 3 may be, but is not limited to, a strapping band.
[0068] This configuration, with multiple conformal plates 2 spaced apart along the third direction A3 and each conformal plate 2 fixed to the beam body using binding members 3, creates multiple discrete constraint points along the extension direction of the pultruded beam. This disperses the tensioning force applied to the pultruded beam by the tensioning device through the tensioning band 12, resulting in a more uniform transmission and distribution of the tensioning force along the extension direction of the pultruded beam. This helps reduce the risk of localized stress concentration, thereby improving the structural integrity and performance consistency of the pultruded beam during the tensioning process.
[0069] Finally, it is necessary to explain that an exemplary method for tensioning the main beam using the aforementioned pultrusion beam tensioning production line 100 is as follows: Step 1: After the main beam is spliced, place it on the main beam storage rack, so that multiple conforming plates 2 and multiple pultruded beam tensioning devices 1 are placed alternately at a spacing of 1 meter.
[0070] Step 2: Use the binding piece 3 to fix the conformal plate 2 to the pultruded beam, connect the tension band 12 to the lifting frame 11, and make the tension band 12 wrap around the main beam from below.
[0071] Step 3: When using it for the first time, adjust the lifting frame 11 to the required position according to the usage requirements, and install the limiting component 15 on the lead screw.
[0072] Step 4: After the tensioning device 1 of the first pultrusion beam has completed tensioning and been verified to be correct, adjust the lower end of the limiting member 15 to a position that fits against the lifting frame 11.
[0073] Step 5: After the position of the limiting member 15 is adjusted, use the locking device 18 to lock the limiting member 15 onto the lead screw 16 (so that the limiting member 15 is in a fixed state).
[0074] Step 6: Mark the error prevention line at the maximum limit position.
[0075] This completes the initial tensioning. In subsequent repeated tensioning of pultruded beams of the same specification, there is no need to adjust the position of the limiting member 15. If a pultruded beam of a different specification is used, steps 3-6 are repeated. The foolproof line is used to prevent the limiting member 15 from being accidentally moved, thus avoiding the need for recalibration.
[0076] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A tensioning device for a pultruded beam, characterized in that, include: A lifting frame, which is movable along a first direction; the lifting frame has a first end and a second end disposed opposite to each other along a second direction; wherein the second direction is perpendicular to the first direction; An elastic band, one end of which is connected to the first end and the other end of which is connected to the second end; A conforming mechanism is located between the lifting frame and the tensioning band. The pultruded beam to be tensioned is installed between the tensioning band and the conforming mechanism and is supported on the tensioning band. A driving device is provided for driving the lifting frame to move relative to the conforming mechanism along the first direction; the lifting frame has a maximum moving position relative to the conforming mechanism. A limiting member is provided to limit the movement of the lifting frame away from the conforming mechanism at the maximum movement position.
2. The tensioning device for the pultruded beam according to claim 1, characterized in that, It also includes a lead screw and a lead screw nut, the lead screw nut being movably sleeved on the lead screw along the direction of gravity; the lead screw nut being fixedly connected to the lifting frame; the driving device is used to drive the lead screw to rotate; The limiting member is provided on the lead screw and is located on the side of the lead screw nut away from the conforming mechanism.
3. The tensioning device for a pultruded beam according to claim 2, characterized in that, The limiting component can switch between a fixed state and a moving state relative to the lead screw; The tensioning device of the pultruded beam includes locking fasteners; In the fixed state, the locking fastener locks the limiting member together with the lead screw; In the moving state, the locking element is disengaged from the lead screw to allow the limiting member to move relative to the lead screw in a first direction.
4. The tensioning device for the pultruded beam according to claim 3, characterized in that, The limiting member is a nut, which is threadedly engaged with the lead screw. The limiting member also has a threaded hole that penetrates the inner and outer circumferential surfaces of the limiting member. The locking device is a bolt, and the locking device is threadedly engaged with the threaded hole; In the fixed state, the locking device abuts against the lead screw.
5. The tensioning device for the pultruded beam according to claim 4, characterized in that, The number of threaded holes and locking fasteners are both multiple, and the multiple threaded holes are provided in a one-to-one correspondence with the multiple locking fasteners.
6. The tensioning device for a pultruded beam according to claim 1, characterized in that, The width of the tensioning band is greater than or equal to 70 mm and less than or equal to 75 mm; and / or, The tensioning band is made of nylon.
7. The tensioning device for a pultruded beam according to claim 1, characterized in that, The first end of the lifting frame is provided with a first fixed post; the second end of the lifting frame is provided with a second fixed post; one end of the tensioning band is sleeved on the first fixed post, and the other end of the tensioning band is sleeved on the second fixed post.
8. The tensioning device for a pultruded beam according to claim 7, characterized in that, The tensioning band includes a first connecting section, a second connecting section, and a first tensioning section and a second tensioning section stacked together. One end of the first tensioning section is connected to one end of the second tensioning section through a first connecting section; one end of the first tensioning section and one end of the second tensioning section are located on the radial sides of the first fixing post, and the first connecting section is located on the side of the first fixing post away from the first tensioning section and the second tensioning section; The other end of the first tensioning section is connected to the other end of the second tensioning section through a second connecting section; the other ends of the first tensioning section and the other ends of the second tensioning section are located on the radial sides of the second fixing post, and the second connecting section is located on the side of the second fixing post away from the first tensioning section and the second tensioning section; The tensioning device of the pultruded beam also includes a restraining ring, which is fixedly sleeved on the first tensioning section and the second tensioning section.
9. A tensioning production line for pultruded beams, characterized in that, The invention includes a tensioning device for a pultruded beam according to any one of claims 1-8, wherein the tensioning devices for the pultruded beam are arranged at intervals along a third direction; the third direction is perpendicular to the first direction and the second direction.
10. The tensioning production line for pultruded beams according to claim 9, characterized in that, It also includes multiple conformal plates and multiple binding members. The multiple conformal plates are arranged at intervals in the third direction. The multiple conformal plates are set in one-to-one correspondence with the multiple binding members. Each conformal plate is fixed to the pultruded beam by its corresponding binding member.