Tensioning device and tensioning method for forked steel strand

Abstract

The application discloses a forked steel strand tensioning device, which comprises a first mounting part, a second mounting part and an adjusting device; the first mounting part and the second mounting part are fixedly connected with two parts of the forked steel strand whose distance needs to be adjusted; the adjusting device comprises an adjusting rope and a jack; the jack is arranged at one end of the first mounting part; the first end of the adjusting rope is connected to the other end of the first mounting part, the adjusting rope passes through the second mounting part, and the second end of the adjusting rope passes through the first mounting part and is connected to the jack; the jack is used for pulling the second end of the adjusting rope away from the first mounting part, so as to drive the first mounting part to move close to the second mounting part. The forked steel strand tensioning device can realize the mutual approaching of the two parts of the forked steel strand whose distance is adjustable by only using one jack to pull the adjusting rope, so that the user can conveniently adjust the forked steel strand to be tensioned and improve the pre-tension of the steel strand, and the forked steel strand tensioning device has simple structure and is convenient for the user to use. The application further discloses a forked steel strand tensioning method.

Description

Technical Field

[0001] This invention relates to the field of steel strand tensioning technology, and more specifically, to a tensioning device for fork-ear type steel strands, and also to a tensioning method for fork-ear type steel strands. Background Technology

[0002] In recent years, the photovoltaic industry has been booming, and flexible supports have also begun to emerge. Flexible supports mainly use steel strand tensioning load-bearing method, and have the characteristics of large span, small footprint, and strong adaptability.

[0003] Currently, the fixed ends of the steel strands used in flexible supports mainly rely on anchor clamps for fixation. Insufficient anchor clamping force often leads to slippage of the steel strands, or plastic elongation due to prolonged tension, causing prestress loss and relaxation. This inevitably results in significant swaying under strong winds, affecting the stability and safety of the flexible support. To address the issue of steel strand relaxation, fork-ear type steel strands have emerged on the market. These strands consist of two adjustable parts; by bringing these two adjustable parts closer together, the steel strands can be tensioned, increasing their preload.

[0004] In a fork-type steel strand, the two adjustable sections are pulled by the slack strand, making adjustment difficult. Two jacks are needed to simultaneously pull these two adjustable sections to counteract the pulling force of the slack strand. However, this method requires two jacks, resulting in a complex structure that is inconvenient to apply.

[0005] Therefore, how to simplify the structure of tensioning equipment for fork-type steel strands to facilitate user operation is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a tensioning device for a forked-ear type steel strand, which uses a jack to pull a steering adjustment rope to bring two adjustable sections of the forked-ear type steel strand closer together. This facilitates user adjustment of the forked-ear type steel strand to tension and increases the preload. Furthermore, compared to the existing two-jack solution, its structure is simpler and easier for users to operate. The present invention also provides a tensioning method for the forked-ear type steel strand used in the above-mentioned tensioning device, allowing users to adjust the tension of the forked-ear type steel strand using a simpler device.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A tensioning device for fork-type steel strands, comprising:

[0009] First installation component;

[0010] The second mounting component; the first mounting component and the second mounting component are respectively fixedly connected to the two parts of the fork-type steel strand whose distance is to be adjusted;

[0011] An adjusting device includes an adjusting rope and a jack; the jack is disposed at one end of the first mounting member; a first end of the adjusting rope is connected to the other end of the first mounting member, and the adjusting rope passes around the second mounting member, with its second end passing through the first mounting member and connected to the jack; the jack is used to pull the second end of the adjusting rope away from the first mounting member, so as to drive the first mounting member closer to the second mounting member.

[0012] Preferably, the tensioning equipment further includes a distance adjustment device, which is installed on the adjustment sleeve of the fork-shaped steel strand and is used to screw the adjustment sleeve when the jack pulls the second end of the adjustment rope.

[0013] Preferably, in the above-mentioned tensioning equipment, the distance adjustment device is a smart wrench; the smart wrench is equipped with an infrared rangefinder for measuring the movement distance of the first mounting component;

[0014] The intelligent wrench can control the number of rotations and speed of the adjusting sleeve based on the moving distance of the first mounting component.

[0015] Preferably, in the above-mentioned tensioning device, the jack is a hollow jack, and the second end of the adjusting rope passes through the through hole of the first mounting member and the jack in sequence, and is installed with an anchor; the jack is clamped between the anchor and the first mounting member.

[0016] Preferably, in the above-mentioned tensioning device, the first end of the adjusting rope is fixed to the first mounting component, or

[0017] The first end of the adjusting rope passes through the insertion hole of the mounting component, and the first end of the adjusting rope is fixed with an anti-detachment anchor, which is located on the side of the first mounting component away from the second mounting component.

[0018] Preferably, in the above-mentioned tensioning equipment, the first mounting component includes two fixing pads, each fixing pad comprising a base plate and a mounting plate fixed to the base plate;

[0019] The base plates of the two fixing pads are connected by a fastener and clamp the steel strand body of the fork-shaped steel strand and / or the first screw; the first end of the adjusting rope is connected to the mounting plate of one of the fixing pads and the second end passes through the through hole of the mounting plate of the other fixing pad.

[0020] Preferably, in the above-mentioned tensioning device, the first screw and the steel strand body are fixedly connected by a crimp joint, and the base plates of the two fixed pads clamp and fix the crimp joint.

[0021] Preferably, in the above-mentioned tensioning device, the second mounting component is provided with a steering component, and the adjusting rope passes around the steering component and can move smoothly along the steering component.

[0022] Preferably, in the above-mentioned tensioning device, the steering component is a fixed pulley that is rotatably mounted on the second mounting component around its own axis, or the steering component is a smooth guide arc plate fixed to the second mounting component.

[0023] Preferably, in the above-mentioned tensioning equipment, the second mounting component includes two flat beams respectively fixed to the fork-shaped steel strand; there are two fixed pulleys, which are symmetrically distributed on both sides of the fork-shaped steel strand.

[0024] A method for tensioning fork-type steel strands, used in any one of the tensioning devices described in the above technical solutions, comprising:

[0025] S1. The tensioning device is assembled onto the fork-shaped steel strand to be tensioned;

[0026] S2. Set the parameters of the jack;

[0027] S3. Start the jack to perform tensioning work and tighten the adjusting sleeve of the fork-shaped steel strand until the preset conditions are met, then simultaneously stop the jack and stop tightening the adjusting sleeve.

[0028] Preferably, in the above tensioning method, when performing step S3, the adjusting sleeve is tightened using the distance adjusting device of the tensioning equipment; before step S3, the method further includes: setting the distance adjusting device in step S03; step S03 is located after step S2, or between step S1 and step S2.

[0029] Preferably, in the above tensioning method, step S2 includes: inputting the target prestress parameter and tensioning stroke parameter to the controller of the jack; the preset condition includes: the internal pressure of the jack is equal to the target prestress parameter;

[0030] Step S03 includes: initializing the distance adjustment device and inputting the internal thread pitch parameter of the adjustment sleeve;

[0031] The adjusting sleeve for tightening the fork-type steel strand in step S3 includes:

[0032] The infrared ranging instrument of the distance adjustment device measures the moving distance of the first mounting component; based on the measurement result and the internal thread pitch parameter of the adjusting sleeve, the distance adjustment device adjusts the number of rotations and the rotation speed of the adjusting sleeve.

[0033] Preferably, in the above tensioning method, assembling the tensioning device onto the fork-type steel strand to be tensioned includes:

[0034] The first mounting component is fixedly connected to one of the two parts of the fork-shaped steel strand to be adjusted; the second mounting component is fixedly connected to the other part of the two parts of the fork-shaped steel strand to be adjusted; the first end of the adjusting rope is placed on the first mounting component, and the second end of the adjusting rope is passed through the through hole of the first mounting component and the jack and the anchor of the tensioning device is installed, so that the adjusting rope passes around the second mounting component.

[0035] This invention provides a tensioning device for a forked-ear type steel strand, comprising a first mounting component, a second mounting component, and an adjusting device; the first mounting component and the second mounting component are respectively fixedly connected to two parts of the forked-ear type steel strand whose distance to be adjusted; the adjusting device includes an adjusting rope and a jack; the jack is arranged at one end of the first mounting component; the first end of the adjusting rope is connected to the other end of the first mounting component, and the adjusting rope passes around the second mounting component, with its second end passing through the first mounting component and connected to the jack; the jack is used to pull the second end of the adjusting rope away from the first mounting component, thereby driving the first mounting component closer to the second mounting component.

[0036] When using the above-mentioned tensioning equipment, the jack is turned on, and the jack extends and drags the second end of the adjusting rope away from the first mounting component. This increases the distance between the first mounting component and the second end of the adjusting rope, while the total length of the adjusting rope from the first end to the second end remains unchanged. This reduces the rope length between the first and second mounting components, allowing the first and second mounting components to move closer together. In other words, the jack drives the first and second mounting components to drag the two adjustable parts of the fork-shaped steel strand closer together, thereby improving the convenience of adjusting the tension of the fork-shaped steel strand.

[0037] The aforementioned tensioning device uses only one jack to pull the adjusting rope to bring the two adjustable parts of the fork-shaped steel strand closer together. This makes it convenient for users to adjust the fork-shaped steel strand to tension and increase the preload of the steel strand. At the same time, compared with the existing technology that uses two jacks, the structure of this tensioning device is simpler and easier for users to use.

[0038] The present invention also provides a tensioning method for fork-ear type steel strands for use in the above-mentioned tensioning equipment, which makes it easier for users to adjust the tension of fork-ear type steel strands using simpler equipment. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the fork-ear type steel strand provided in an embodiment of the present invention;

[0041] Figure 2 This is an assembly diagram of the tensioning equipment and the fork-type steel strand provided in an embodiment of the present invention;

[0042] Figure 3 for Figure 2 A schematic diagram of the assembly of the structure shown with the end beam;

[0043] Figure 4 This is a schematic diagram of the structure of a fixed pulley provided in an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of the spreader beam provided in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of the fixing pad assembly provided in an embodiment of the present invention;

[0046] Figure 7 A perspective view of the distance adjustment device provided in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of another tensioning device and fork-type steel strand provided in an embodiment of the present invention;

[0048] Figure 9 for Figure 8 The front view of the structure shown;

[0049] Figure 10 for Figure 8 Top view of the structure shown;

[0050] Figure 11 A schematic flowchart of the tensioning method provided in an embodiment of the present invention;

[0051] in, Figures 1-10 middle:

[0052] 10. Fork-ear type steel strand; 11. Fork ear; 12. Second screw; 13. Adjusting sleeve; 14. First screw; 15. Crimp joint; 16. Steel strand body; 20. End crossbeam; 101. Anchor; 102. Jack; 103. Distance adjustment device; 131. Infrared rangefinder; 104. Fixed pulley; 105. Second mounting component; 151. Spread beam; 1511. Mounting plate; 106. Adjusting rope; 107. First mounting component; 171. Fixing pad; 1711. Mounting plate; 1712. Reinforcing plate; 1713. Base plate; 108. Anti-detachment anchor; 109. Support. Detailed Implementation

[0053] This invention discloses a tensioning device for fork-ear steel strands. It utilizes a single jack to pull a steering adjustment rope, bringing two adjustable sections of the fork-ear steel strand closer together. This facilitates user adjustment of the fork-ear steel strand to tension and increases its preload. Compared to existing designs using two jacks, its structure is simpler and easier for users to operate. This invention also discloses a tensioning method for fork-ear steel strands used in the aforementioned tensioning device, allowing users to adjust the tension of the fork-ear steel strands using a simpler method.

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Please see Figures 1-8 This invention provides a tensioning device for a fork-ear type steel strand, wherein the fork-ear type steel strand 10 includes a steel strand body 16, a first screw 14 fixedly connected to the steel strand body 16, a second screw 12 with fork ears 11 installed, and an adjusting sleeve 13 threadedly engaged with the first screw 14 and the second screw 12 respectively; the first screw 14, the second screw 12, and the adjusting sleeve 13 are coaxial. Clearly, in the fork-ear type steel strand 10, the first screw 14 and the steel strand body 16 are fixedly connected to form one part, and the second screw 12 and the fork ears 11 are fixedly connected to form another part. The two parts are connected by the adjusting sleeve 13, allowing the distance between the two parts to be adjustable.

[0056] The steel strand body 16 can be configured such that only one end is connected to the first screw 14, which can both adjust the tension of the steel strand body 16 and simplify the structure. The steel strand body 16 can also be configured such that both ends are connected to the first screw 14, and the first screw 14 at both ends is connected to the second screw 12 with fork lugs 11 through the adjusting sleeve 13. This embodiment does not limit the configuration.

[0057] The steel strand body 16 can be used not only in the field of flexible support for photovoltaic modules, but also in buildings such as bridges. In application, the fork lugs 11 are installed on the site foundation (such as end beams 20 or walls) via pins. Taking the fork lug type steel strand 10 used in the field of flexible support for photovoltaic modules as an example, during assembly, one end of the fork lug type steel strand 10 needs to be assembled onto an end beam 20 via pins. Then, using auxiliary tools (such as winches), the fork lugs 11 at the other end of the fork lug type steel strand 10 are pulled to another end beam 20, and then the fork lugs 11 at the other end are assembled using pins.

[0058] The tensioning device provided in this embodiment includes a first mounting component 107, a second mounting component 105, and an adjustment device. The first mounting component 107 and the second mounting component 105 are respectively fixedly connected to the two parts of the fork-type steel strand to be adjusted (i.e., one part formed by the fixed connection of the first screw 14 and the steel strand body 16, and the other part formed by the fixed connection of the second screw 12 and the fork 11). The adjustment device includes an adjustment rope 106 and a jack 102. The jack 102 is arranged at one end of the first mounting component 107 (specifically, the jack 102 is fixed to one end of the first mounting component 107). The first end of the adjustment rope 106 is connected to the other end of the first mounting component 107, and the adjustment rope 106 passes around the second mounting component 105. The second end of the adjustment rope 106 passes through the first mounting component 107 and is connected to the jack 102. The jack 102 is used to pull the second end of the adjustment rope 106 away from the first mounting component 107 to drive the first mounting component 107 closer to the second mounting component 105.

[0059] When using the above-mentioned tensioning equipment, jack 102 is turned on, jack 102 extends and drags the second end of the adjusting rope 106 away from the first mounting member 107. The distance from the first mounting member 107 to the second end of the adjusting rope 106 increases, while the total length of the adjusting rope 106 from the first end to the second end remains unchanged. This makes the rope length between the first mounting member 107 and the second mounting member 105 smaller, allowing the first mounting member 107 to move closer to the second mounting member 105. That is, jack 102 drives the first and second mounting members to drag the two adjustable parts of the fork-ear type steel strand 10 closer to each other, reducing the difficulty of turning the adjusting sleeve 13 which is threaded to the two adjustable parts, thereby improving the convenience of adjusting the tension of the fork-ear type steel strand 10.

[0060] The aforementioned tensioning device utilizes only one jack 102 to pull the adjusting rope 106, which allows the two adjustable parts of the fork-shaped steel strand 10 to be brought closer together. This facilitates the user in adjusting the fork-shaped steel strand 10 to tension and increasing its preload. Compared to the existing technology that uses two jacks, this tensioning device has a simpler structure and is easier for users to operate.

[0061] Furthermore, the aforementioned tensioning equipment also includes a distance adjustment device 103, which is installed on the adjustment sleeve 13 and is used to screw the adjustment sleeve 13 when the jack 102 pulls the second end of the adjustment rope 106.

[0062] If the distance adjustment device can be set to a manual wrench operated by a person, then during operation, attention should be paid to matching the speed of turning the adjusting sleeve 13 with the speed of pulling the second end of the adjusting rope 106 by the jack 102.

[0063] Preferably, the distance adjustment device 103 is a smart wrench; the smart wrench is equipped with an infrared rangefinder 131 for measuring the moving distance of the first mounting member 107 (the "moving distance" refers to the dimension by which the first mounting member 107 moves relative to the smart wrench along the axial direction of the adjusting sleeve 13) and the moving speed (the "moving speed" refers to the speed at which the first mounting member 107 moves relative to the smart wrench along the axial direction of the adjusting sleeve 13); the distance adjustment device 103 can control the number of turns and speed of its own turning of the adjusting sleeve 13 according to the moving distance of the first mounting member 107.

[0064] The jack 102 is a hollow jack. The second end of the adjusting rope 106 passes through the through hole of the first mounting member and the jack 102 in sequence, and is then installed with the anchor 101. The jack 102 is sandwiched between the anchor 101 and the first mounting member 107. When it is necessary to tension the fork-type steel strand 10, the jack 102 is opened and becomes longer, with its two ends pressing against the first mounting member 107 and the anchor 101 respectively, so that the second end of the adjusting rope 106 moves away from the first mounting member 107.

[0065] The first end of the adjusting rope 106 can be fixed to the first mounting member 107, or it can be inserted through the insertion hole of the first mounting member 107. Correspondingly, the first end of the adjusting rope 106 is fixed with an anti-detachment anchor 108, which is located on the side of the first mounting member 107 away from the second mounting member 105.

[0066] like Figure 2 , 6 As shown, the first mounting component 107 includes two fixing pad parts 171. Each fixing pad part 171 includes a base plate 1713 and a mounting plate 1711 fixed to the base plate 1713. The base plates 1713 of the two fixing pad parts 171 are connected by fasteners and clamp and fix the steel strand body 16 and / or the first screw 14. The first end of the adjusting rope 106 is connected to the mounting plate 1711 of one fixing pad part 171, and the second end of the adjusting rope 106 passes through the through hole of the mounting plate 1711 of the other fixing pad part 171.

[0067] To improve reliability, the mounting pad 171 also includes a reinforcing plate 1712 that is fixedly connected to the mounting plate 1711 and the base plate 1713 respectively.

[0068] Specifically, the first screw rod 14 of the fork-ear type steel strand 10 and the steel strand body 16 are fixedly connected through a compression joint 15; correspondingly, the bottom plates 1713 of the two split fixing pads 171 are preferably arranged to clamp and fix the above compression joint 15 to achieve a fixed connection with the first screw rod 14. Grooves for accommodating the compression joint 15 are respectively formed in the bottom plates 1713 of the two split fixing pads 171, and the shape of the grooves is adapted to the contour features of the compression joint 15. In addition, grooves for passing through the steel strand body 16 are respectively formed in the bottom plates 1713 of the two split fixing pads 171.

[0069] In the first mounting member 107 provided in this embodiment, the two split parts are in an up-and-down structure as shown in Figure 2 Shown, the two split parts can also be arranged in a left-and-right distribution structure, which is not specifically limited in this embodiment.

[0070] The adjusting rope 106 can be arranged to directly bypass the second mounting member 105. Correspondingly, the second mounting member 105 needs to be arranged to be smooth to reduce the sliding friction of the adjusting rope 106. Preferably, the second mounting member 105 is provided with a turning member, and the adjusting rope 106 bypasses the turning member and can smoothly move along the turning member.

[0071] The turning member can be arranged as a smooth guiding arc plate fixed to the second mounting member 105. The smooth guiding arc plate is in a "U" shape, and its opening faces the first mounting member 107, and the adjusting rope 106 is wound around the outer periphery of the smooth guiding arc plate. The turning member is preferably arranged as a fixed pulley 104 that can rotate around its own axis and is mounted on the second mounting member 105.

[0072] Such as Figure 2 、 5 、8, 9 shown, the second mounting member 105 includes two crossbeams 151 respectively fixed to the fork ear 11.

[0073] The crossbeam 151 is in a "channel" shape, and mounting flats 1511 are respectively provided at both ends thereof. The two crossbeams 151 are symmetrically fixed on both sides of the fork ear 11; the fixed pulley 106 is assembled on the support 109, and the support 109 is fixed on the mounting flats 1511 of the two crossbeams 151. The support 109 of the fixed pulley can be fixed on the side of the mounting flat 1511 facing away from the first mounting member 107, as shown in Figure 2 Shown; the support 109 of the fixed pulley can also be fixed on the side of the mounting flat 1511 facing the first mounting member 107, as shown in Figure 8 、 9 、10 shown.

[0074] Specifically, in the above tensioning equipment, there are two fixed pulleys 104, and the two are symmetrically distributed on both sides of the fork-ear type steel strand 10, as shown in Figure 2 、 8 Shown.

[0075] The adjusting rope 106 is a steel wire rope, which can be set to 2 or more strands according to the required force; the fixed pulley 104 is not limited to the two shown in the figure, and the corresponding number can be set according to the number of steel wire rope strands.

[0076] The tensioning device provided in this embodiment can complete the tensioning of the fork-shaped steel strand using a single jack 102, avoiding the use of multiple jacks 102. It is especially suitable for the field of flexible photovoltaic module supports where the fork-shaped steel strand 10 is installed at a high position, avoiding the need to lift multiple jacks 102 to a high position. This not only facilitates operation but also saves manpower and costs.

[0077] In addition, in the above-mentioned tensioning device, the adjusting rope 106 passes around the second mounting member 105, so that when the jack 102 pulls the second end of the adjusting rope 106, it provides driving force directly to the first mounting member 107, and also provides the same driving force to the first mounting member 107 through the first end of the adjusting rope 106. This ensures that the pulling force output by the jack 102 is only half of the design pulling force of the fork-type steel strand 10, which is sufficient to meet the requirements. This makes it easier to select a smaller size jack 102 and to use it conveniently.

[0078] Furthermore, the tensioning device provided in this embodiment is directly installed on the fork-shaped steel strand 10 without needing to be connected and fixed to other structures. As long as the specifications of the fork-shaped steel strand 10 remain unchanged, the tensioning device can continue to be applied to various construction scenarios, demonstrating strong versatility.

[0079] This invention provides a method for tensioning a fork-type steel strand, used in the tensioning equipment provided in the above embodiments, comprising:

[0080] S1. Assemble the tensioning equipment onto the fork-type steel strand 10 to be tensioned;

[0081] S2. Set the parameters of jack 102;

[0082] S3. Start jack 102 to perform tensioning work, and tighten the adjusting sleeve 13 of the fork-type steel strand 10 until the preset conditions are met. Simultaneously stop jack 102 and stop tightening adjusting sleeve 13.

[0083] In step S3, the adjusting sleeve 103 can be manually tightened using a hand wrench, preferably using the distance adjusting device 103 of the tensioning equipment to tighten the adjusting sleeve 13. The distance adjusting device 103 is a smart wrench. Before step S3, the process includes: S03, setting the distance adjusting device 103. This step S03 can be set after step S2, such as... Figure 11 As shown; or step S03 may be set between steps S1 and S2, but this embodiment does not limit it.

[0084] In the above tensioning method, step S2 includes: inputting the target prestress parameter and tensioning stroke parameter into the controller of jack 102; correspondingly, the preset condition in step S3 includes: the pressure inside jack 102 is equal to the target prestress parameter. Specifically, jack 102 has a built-in pressure sensor. The target prestress parameter value is input into the controller of jack 102. If the target prestress value is reached after jack 102 is started, the pressure sensor will respond, and the controller will control jack 102 to stop working.

[0085] When performing step S3, the jack 102 is controlled by the controller. If the stroke of the jack 102 is less than the above-mentioned tensioning stroke parameter, the controller will break down the target prestress parameter and the tensioning stroke parameter, and control the jack 102 to complete the tensioning work in a progressive manner in step S3. If the jack stroke is not less than the above-mentioned tensioning stroke parameter, the controller will control the jack 102 to complete the tensioning work in one go in step S3.

[0086] Step S03 includes: initializing the distance adjustment device 103 (i.e., clearing and updating the data of the distance adjustment device 103 so that the infrared rangefinder 131 can automatically capture the distance in real time in subsequent step S3), and inputting the internal thread pitch parameter of the adjustment sleeve 13.

[0087] Correspondingly, step S3, “tightening the adjusting sleeve of the fork-type steel strand” includes: the infrared ranging instrument 131 of the distance adjusting device 103 measures the moving distance of the first mounting part 107 relative to the distance adjusting device 103; the distance adjusting device 103 adjusts the number of rotations and the rotation speed of the adjusting sleeve 13 according to the measurement result and the internal thread pitch parameter of the adjusting sleeve 13.

[0088] Specifically, the infrared rangefinder 131 of the distance adjustment device 103 measures the moving distance ∆L of the first mounting member 107 (i.e., the distance the first mounting member 107 moves along the axial direction of the adjusting sleeve 13 towards the distance adjustment device 103). The intelligent distance adjustment device 103 calculates the rotational speed and number of rotations of the adjusting sleeve 13 according to the following formula, and tightens the adjusting sleeve 13 according to the calculation results:

[0089] ∆L=V 实速 *T

[0090] ∆L=P 螺距 *R 转数

[0091] n = R 转数 / T

[0092] Among them, V 实速 The moving speed of the first mounting component 107 relative to the distance adjustment device 103;

[0093] T represents the start-up time of jack 102;

[0094] P 螺距 To adjust the pitch of the internal thread in sleeve 13;

[0095] R 转数 To adjust the number of rotations of sleeve 13 (i.e., to adjust the number of rotations of sleeve 13 within time T).

[0096] n is the rotational speed of the adjusting sleeve 13 (i.e., the number of rotations of the adjusting sleeve 13 per unit time).

[0097] In the above tensioning method, assembling the tensioning equipment onto the fork-type steel strand 10 to be tensioned includes:

[0098] The first mounting component 107 is fixedly connected to one of the two parts of the fork-type steel strand whose distance is to be adjusted (specifically, the first mounting component 107 is fixedly connected to the crimp connector 105); the second mounting component 105 is fixedly connected to the other part of the two parts of the fork-type steel strand whose distance is to be adjusted (specifically, the second mounting component 105 is fixedly connected to the fork 11); the first end of the adjusting rope 106 is set on the first mounting component 107, the second end of the adjusting rope 106 is passed through the through hole of the first mounting component 107 and the jack 102 and the anchor 101 of the tensioning equipment is installed, and at the same time the adjusting rope 106 is made to pass around the second mounting component 105 (specifically, pass around the turning part of the second mounting component 105).

[0099] In the scheme of intelligently rotating the adjusting sleeve 13 using the distance adjusting device 103 in step S3, the step S1 of "assembling the tensioning device onto the fork-shaped steel strand 10 to be tensioned" also includes fixing the distance adjusting device 103 to the adjusting sleeve 13.

[0100] The jack 102 is hydraulically driven and connected to a hydraulic system, which is controlled by a controller. After the hydraulic pump of the hydraulic system is started, the jack 102 begins tensioning. The controller controls the hydraulic oil flow rate (i.e., controls the speed of the hydraulic pump) according to the tensioning speed parameters input by the user. When the jack 102 is tensioned to the target prestress parameters input by the user, the controller controls the hydraulic pump to stop working automatically. At this time, the first installation component 107 stops moving, the detection result of the infrared rangefinder 131 remains unchanged, and the distance adjustment device 103 stops turning the adjusting sleeve 13.

[0101] Preferably, in the above tensioning method, after step S3, the method further includes: S4 using a rope force gauge to verify the tension of the fork-type steel strand 10. If the tension value is qualified, the tensioning ends; if the tension value is not qualified, the process returns to step S2.

[0102] The tensioning method provided in this embodiment is used with the tensioning equipment provided in the above embodiments, making it convenient for users to use a simpler tensioning equipment to tighten the adjusting sleeve 13 of the fork-shaped steel strand 10. In this tensioning method, intelligent tensioning of the fork-shaped steel strand 10 can be achieved by setting the jack 102 and the distance adjustment device 103. The tension and feed stroke can be obtained in real time through the display screen of the distance adjustment device 103, making it convenient to use.

[0103] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tensioning device for fork-ear type steel strands, characterized in that, include: First installation component; The second mounting component; the first mounting component and the second mounting component are respectively fixedly connected to the two parts of the fork-type steel strand whose distance is to be adjusted; An adjusting device includes an adjusting rope and a jack; the jack is disposed at one end of the first mounting member; a first end of the adjusting rope is connected to the other end of the first mounting member, and the adjusting rope passes around the second mounting member, with its second end passing through the first mounting member and connected to the jack; the jack is used to pull the second end of the adjusting rope away from the first mounting member, so as to drive the first mounting member closer to the second mounting member; The first end of the adjusting rope is fixed to the first mounting member, or the first end of the adjusting rope passes through the insertion hole of the mounting member, and the first end of the adjusting rope is fixed with an anti-detachment anchor, which is located on the side of the first mounting member opposite to the second mounting member.

2. The tensioning device according to claim 1, characterized in that, It also includes a distance adjustment device, which is installed on the adjustment sleeve of the fork-type steel strand and is used to screw the adjustment sleeve when the jack pulls the second end of the adjustment rope.

3. The tensioning device according to claim 2, characterized in that, The distance adjustment device is a smart wrench; the smart wrench is equipped with an infrared rangefinder for measuring the movement distance of the first mounting component; The intelligent wrench can control the number of rotations and speed of the adjusting sleeve based on the moving distance of the first mounting component.

4. The tensioning device according to claim 1, characterized in that, The jack is a hollow jack. The second end of the adjusting rope passes through the through hole of the first mounting component and the jack in sequence, and is then installed with an anchor. The jack is clamped between the anchor and the first mounting component.

5. The tensioning device according to claim 1, characterized in that, The first mounting component includes two fixing pad parts, each fixing pad part including a base plate and a mounting plate fixed to the base plate; The base plates of the two fixing pads are connected by a fastener and clamp the steel strand body of the fork-shaped steel strand and / or the first screw; the first end of the adjusting rope is connected to the mounting plate of one of the fixing pads and the second end passes through the through hole of the mounting plate of the other fixing pad.

6. The tensioning device according to claim 5, characterized in that, The first screw and the steel strand body are fixedly connected by a crimp connector, and the base plates of the two fixing pads clamp and fix the crimp connector.

7. The tensioning device according to claim 1, characterized in that, The second mounting component is equipped with a steering component, and the adjusting rope passes around the steering component and can move smoothly along the steering component.

8. The tensioning device according to claim 7, characterized in that, The steering component is a fixed pulley that is rotatably mounted on the second mounting component around its own axis, or the steering component is a smooth guide arc plate fixed to the second mounting component.

9. The tensioning device according to claim 8, characterized in that, The second mounting component includes two flat beams that are respectively fixed to the fork-shaped steel strand; there are two fixed pulleys, which are symmetrically distributed on both sides of the fork-shaped steel strand.

10. A method for tensioning fork-type steel strands, used in the tensioning equipment described in any one of claims 1-9, characterized in that, include: S1. The tensioning device is assembled onto the fork-shaped steel strand to be tensioned; S2. Set the parameters of the jack; S3. Start the jack to perform tensioning work and tighten the adjusting sleeve of the fork-shaped steel strand until the preset conditions are met, then simultaneously stop the jack and stop tightening the adjusting sleeve.

11. The tensioning method according to claim 10, characterized in that, When performing step S3, the adjusting sleeve is tightened using the distance adjusting device of the tensioning equipment; before step S3, step S03 is further included: setting the distance adjusting device; step S03 is located after step S2, or between step S1 and step S2.

12. The tensioning method according to claim 11, characterized in that, Step S2 includes: inputting the target prestress parameters and tension stroke parameters into the controller of the jack; the preset conditions include: the internal pressure of the jack is equal to the target prestress parameters; Step S03 includes: initializing the distance adjustment device and inputting the internal thread pitch parameter of the adjustment sleeve; The adjusting sleeve for tightening the fork-type steel strand in step S3 includes: The infrared ranging instrument of the distance adjustment device measures the moving distance of the first mounting component; based on the measurement result and the internal thread pitch parameter of the adjusting sleeve, the distance adjustment device adjusts the number of rotations and the rotation speed of the adjusting sleeve.

13. The tensioning method according to claim 10, characterized in that, The process of assembling the tensioning device onto the fork-type steel strand to be tensioned includes: The first mounting component is fixedly connected to one of the two parts of the fork-shaped steel strand to be adjusted; the second mounting component is fixedly connected to the other part of the two parts of the fork-shaped steel strand to be adjusted; the first end of the adjusting rope is placed on the first mounting component, and the second end of the adjusting rope is passed through the through hole of the first mounting component and the jack and the anchor of the tensioning device is installed, so that the adjusting rope passes around the second mounting component.

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