Modular prestressed steel strand quick positioning and locking device

Abstract

The utility model provides a kind of modularization prestressed steel strand quick positioning locking device, belong to building construction accessory technical field.The device includes steel strand and the anchoring sleeve that its outside is set.The two ends of anchoring sleeve are separated into four groups of clamping pieces by several notches, and the inner arc surface of clamping piece is integrally made of tooth, and tooth is glued with rubber pad.Anchoring sleeve outer wall is equipped with shell, and two groups of locking structure are equipped between shell and anchoring sleeve two ends, and the locking structure is connected with the outer arc surface of clamping piece by moving from inside to outside.By locking structure, anchoring sleeve two ends clamping piece synergistic effect, form double locking mechanism, enhance locking reliability and balanced distribution torque.The rubber pad of the inner arc surface of clamping piece is closely combined with steel strand, realize gapless contact, significantly improve friction, enhance locking effect.The design effectively solves the problem that existing device is easily damaged due to spring fatigue or locking force deficiency, ensures the durable and reliable anchoring of prestressed steel strand, avoids prestress loss, guarantees engineering structure safety.

Description

Technical Field

[0001] This application relates to the field of building construction accessories technology, and more specifically, to a modular prestressed steel strand quick positioning and locking device. Background Technology

[0002] In modern building construction, bridge engineering, and various prestressed concrete structures, prestressed steel strands play a crucial load-bearing role. Their stability and reliability are directly related to the safety and service life of the entire structure. Prestressed steel strands, tensioned and anchored within the concrete structure, significantly enhance its load-bearing capacity and crack resistance, which is why they are widely used in various engineering projects.

[0003] To ensure the accurate and rapid positioning and secure anchoring of prestressed steel strands in predetermined positions, rapid positioning and locking devices for prestressed steel strands have been developed. The core function of these devices is to efficiently clamp the steel strands while providing sufficient locking force, preventing slippage or slackness during tensioning, thus ensuring accurate establishment and effective transfer of prestress. However, current rapid positioning and locking devices for prestressed steel strands generally have some technical shortcomings. Some locking devices have overly complex structural designs with numerous components, and some even utilize internal springs. If the springs fail, the locking device will be damaged and unable to provide sufficient clamping force. Furthermore, the locking force of these devices on the prestressed steel strands is relatively weak. Utility Model Content

[0004] To overcome the above deficiencies, this application provides a modular prestressed steel strand quick positioning and locking device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A modular prestressed steel strand quick positioning and locking device includes a steel strand, characterized in that: an anchor sleeve is fitted on the outer wall of the steel strand, the two ends of the anchor sleeve are divided into four sets of clamping pieces by several cuts, the inner arc surface of the four sets of clamping pieces is integrally formed with locking teeth, the locking teeth are glued with rubber pads, the outer wall of the anchor sleeve is provided with a shell, and two sets of locking structures are provided at both ends between the shell and the anchor sleeve, the two sets of locking structures move from the inside to the outside and connect with the outer arc surface of the four sets of clamping pieces.

[0007] Furthermore, the outer wall of the anchor sleeve has several slits at equal intervals at both ends, so that the outer ends of the four sets of clamping pieces are flared.

[0008] Furthermore, the axial length of the cut is two-fifths of the axial length of the anchor sleeve, and the width is between 0.1 mm and 0.1 mm.

[0009] Furthermore, the rubber pad is made of a material with good elasticity, appropriate softness and hardness and a high coefficient of friction, and is seamlessly bonded to the inner arc surface of the card teeth.

[0010] Furthermore, the outer shell surface has an irregular hexagonal shape, and its axial length is slightly shorter than that of the anchor sleeve.

[0011] Furthermore, the locking structure includes a first internal threaded ring, a second internal threaded ring, four sliding grooves, four sets of inserts, and several steel balls. The first internal threaded ring and the second internal threaded ring are respectively provided at both ends of the inner shell. The four sliding grooves are equally spaced on the outer wall of the anchor sleeve and extend to the outer arc surface of the four sets of clamps. The inner arc surface of the four sets of inserts slides and fits against the inner bottom of both ends of the four sliding grooves. Several steel balls are equally spaced embedded in the outer arc surface and respectively engage with the inner interior of the first internal threaded ring and the second internal threaded ring.

[0012] Furthermore, the helical directions of the first and second internal threaded rings are mirror-symmetrical and opposite to each other, similar to the configuration of a double-ended screw.

[0013] This utility model has the following beneficial effects:

[0014] This invention features four sets of clamping plates with integrated locking teeth on their inner arc surfaces, bonded to rubber pads. This design utilizes the mechanical engagement of the locking teeth and the high coefficient of friction of the rubber pads. Simultaneously, the rubber pads fill the gap between the steel strand and the locking teeth of the clamping plates, thus significantly enhancing the friction between the clamping plates and the steel strand, thereby greatly improving the locking force.

[0015] This utility model's rubber pad uses a material with good elasticity, suitable hardness, and a high coefficient of friction. It is seamlessly bonded to the clamping teeth, ensuring the durability and stability of the friction force and effectively preventing slippage and slack in the steel strand during tensioning. Furthermore, the use of the rubber pad effectively cushions the impact force on the steel strand during tensioning, reduces wear on the clamps and anchor sleeves, and extends the service life of the device.

[0016] The flared clamp design of this utility model facilitates the rapid insertion and positioning of the steel strand, and generates an inward radial force on the steel strand during the locking process, further enhancing the locking effect.

[0017] This invention employs a unique locking structure comprising a first internal threaded ring, a second internal threaded ring, a sliding groove, an insert block, and a steel ball. Through a simple rotational operation, the clamps can be quickly locked and released, significantly improving construction efficiency. Furthermore, this invention cleverly utilizes a mirror-symmetric design of the bidirectional internal threaded rings, similar to a double-ended screw, allowing the clamps at both ends of the anchor sleeve to work collaboratively to lock the steel strand. This design not only achieves double locking, enhancing anchor reliability, but also makes locking and releasing operations more convenient and rapid. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional view of the overall structure of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application. Figure 1 ;

[0021] Figure 3 This is a cross-sectional view of the overall structure of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application. Figure 2 ;

[0022] Figure 4 This is a partial structural disassembly diagram of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application;

[0023] Figure 5 This is a partial structural diagram of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application. Figure 1 ;

[0024] Figure 6 This is a partial structural diagram of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application. Figure 2 ;

[0025] Figure 7 This is a partial structural diagram of the modular prestressed steel strand quick positioning and locking device provided in the embodiments of this application. Figure 3 .

[0026] In the diagram: 1-steel strand; 2-anchor sleeve; 3-cutout; 4-clamping plate; 5-tooth; 6-rubber pad; 7-outer shell; 8-locking structure; 81-first internal thread ring; 82-second internal thread ring; 83-sliding groove; 84-four sets of inserts; 85-steel ball. Detailed Implementation

[0027] The technical solutions in 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.

[0028] Example:

[0029] Please see Figure 1 A modular prestressed steel strand quick positioning and locking device is disclosed, comprising a steel strand 1, which is mainly used in the field of building engineering. When the steel strand 1 is tensioned and anchored in a concrete structure, it can significantly improve the load-bearing capacity of the structure and effectively enhance its crack resistance.

[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 A modular prestressed steel strand quick positioning and locking device includes an anchor sleeve 2 fitted on the outer wall of the steel strand 1. The two ends of the anchor sleeve 2 are divided into four sets of clamping pieces 4 by several cuts 3. The inner arc surface of the four sets of clamping pieces 4 is integrally formed with locking teeth 5. Rubber pads 6 are glued to the locking teeth 5. The outer wall of the anchor sleeve 2 is provided with a shell 7. Two sets of locking structures 8 are provided at both ends between the shell 7 and the anchor sleeve 2. The two sets of locking structures 8 move from the inside to the outside and connect with the outer arc surface of the four sets of clamping pieces 4. The locking structure 8 includes a first internal thread ring 81, a second internal thread ring 82, four sliding grooves 83, four sets of inserts 84 and several steel balls 85.

[0031] The anchor sleeve 2 is made of high-strength steel, and its inner diameter is slightly larger than the outer diameter of the steel strand 1 to ensure that the steel strand 1 can pass through smoothly. The two ends of the anchor sleeve 2 are divided into four sets of clamping pieces 4 by several slits 3 along the axial direction. The width of each set of clamping pieces 4 is uniform to ensure uniform force distribution.

[0032] The anchor sleeve 2 has several slits 3 evenly spaced at both ends of its outer wall, making the outer ends of the four sets of clamping pieces 4 flared outwards. This design facilitates the guidance of the steel strand 1 into the anchor sleeve 2 and helps improve the locking effect.

[0033] The axial length of the notch 3 is two-fifths of the axial length of the anchor sleeve 2, and its width is between 0.2 mm and 0.85 mm. These parameters can be adjusted according to the actual application to ensure optimal locking effect.

[0034] The four sets of clamping plates 4 have integrated locking teeth 5 on their inner arc surfaces. The locking teeth 5 are arranged in a serrated pattern, with the tips pointing towards the central axis of the anchoring sleeve 2. The function of the locking teeth 5 is to increase the friction between the steel strand 1 and the clamping wire, thereby improving the locking effect. Rubber pads 6 are glued to the locking teeth 5. The rubber pads 6 are made of wear-resistant and high-pressure-resistant rubber materials, such as chlorinated rubber. Their function is to protect the surface of the steel strand 1 from being scratched by the locking teeth 5, and also to help increase friction.

[0035] The rubber pad 6 is tightly bonded to the teeth 5. When the teeth 5 on the inner arc surface of the clamping plate 4 lock the steel strand 1, the rubber pad 6, with its unique elastic properties, plays a crucial role in buffering and filling during the interlocking process between the teeth 5 and the steel strand. It can precisely fill any tiny gaps that may exist between the contact surfaces of the teeth 5 and the steel strand 1, achieving a seamless fit between the clamping plate 4 and the steel strand 1. This seamless fit greatly enhances the friction between the clamping plate 4 and the steel strand 1, thereby significantly improving the locking force of the device and ensuring that the steel strand 1 maintains a stable and reliable locking state during the stress process.

[0036] The outer shell 7 is also made of high-strength steel, with an inner diameter slightly larger than the outer diameter of the anchor sleeve 2. The surface of the outer shell 7 is designed with an irregular, hexagonal shape, which enhances its mechanical engagement with the surrounding structure. Furthermore, the axial length of the outer shell 7 is intentionally designed to be slightly shorter than that of the anchor sleeve 2. This length difference is designed to achieve a specific functional or structural fit, such as reserving space to accommodate other components or media, or optimizing the force transmission path.

[0037] The locking structure 8 primarily functions to securely clamp the steel strand 1 by acting on the clamping pieces 4. Inside the outer casing 7, near both ends of the anchor sleeve 2, a first internal thread ring 81 and a second internal thread ring 82 are respectively provided. The spiral directions of these two internal thread rings 81 and 82 are mirror-symmetrical and opposite to each other, similar to a double-ended screw configuration. This design allows them to work together, achieving more reliable and convenient locking and unlocking operations. Four sliding grooves 83 are equally spaced on the outer wall of the anchor sleeve 2, extending from the outer surface of the anchor sleeve 2 to the outer arc surfaces of the four sets of clamping pieces 4. Each sliding groove 83 mates with an insert 84. Specifically, the inner arc surface of each insert 84 slides against the inner bottom of its corresponding sliding groove 83 at both ends, ensuring smooth sliding of the insert 84 along the sliding groove 83. Several steel balls 85 are equally spaced embedded in the outer arc surface of each insert 84. These steel balls 85, each carrying a corresponding insert 84, slide and engage with the inner grooves of the first internal threaded ring 81 and the second internal threaded ring 82. Rotation of the first and second internal threaded rings 81 and 82 moves the insert 84 along the sliding groove 83, thereby locking or releasing the clamping piece 4. This locking structure 8 combines the helical motion of the internal threaded rings with the linear motion of the insert 84, enabling rapid and reliable locking and releasing of the clamping piece 4. Furthermore, the mirror-symmetric design of the first and second internal threaded rings 81 and 82 allows the clamping pieces 4 at both ends of the anchor sleeve 2 to work together, forming a double locking mechanism, further improving the reliability and safety of the locking process.

[0038] The working principle of this modular prestressed steel strand quick positioning and locking device is as follows: When it is necessary to lock the steel strand 1, by rotating the outer shell 7, the interaction between the first internal thread ring 81, the second internal thread ring 82 and the steel ball 85 pushes the insert block 84 outward along the sliding groove 83, thereby causing the clamping plate 4 to open outward. The locking teeth 5 on its inner arc surface and the rubber pad 6 tightly engage with the steel strand 1, achieving the locking function. Conversely, when it is necessary to release the steel strand 1, the outer shell 7 is rotated in the opposite direction, the insert block 84 moves inward along the sliding groove 83, the clamping plate 4 relaxes, and the steel strand 1 is released.

[0039] It should be noted that the specific model and specifications of the steel ball 85 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0040] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A modular prestressed steel strand quick positioning and locking device, comprising a steel strand (1), characterized in that: The outer wall of the steel strand (1) is fitted with an anchor sleeve (2). The two ends of the anchor sleeve (2) are divided into four sets of clamping pieces (4) by several cuts (3). The inner arc surface of the four sets of clamping pieces (4) is integrally made with a locking tooth (5). A rubber pad (6) is glued to the locking tooth (5). The outer wall of the anchor sleeve (2) is provided with a shell (7). Two sets of locking structures (8) are provided at both ends between the shell (7) and the anchor sleeve (2). The two sets of locking structures (8) move from the inside to the outside and connect with the outer arc surface of the four sets of clamping pieces (4).

2. The modular prestressed steel strand quick positioning and locking device according to claim 1, characterized in that, The anchor sleeve (2) has several cuts (3) at equal intervals at both ends of its outer wall, so that the outer ends of the four sets of clips (4) are flared.

3. The modular prestressed steel strand quick positioning and locking device according to claim 2, characterized in that, The axial length of the cut (3) is two-fifths of the axial length of the anchor sleeve (2), and the width is between 0.2 mm and 0.85 mm.

4. The modular prestressed steel strand quick positioning and locking device according to claim 3, characterized in that, The rubber pad (6) is made of a material with good elasticity, appropriate softness and hardness and high coefficient of friction, and is seamlessly bonded to the inner arc surface of the tooth (5).

5. A modular prestressed steel strand quick positioning and locking device according to claim 4, characterized in that, The outer shell (7) has an irregular hexagonal shape on its surface and its axial length is slightly shorter than that of the anchor sleeve (2).

6. A modular prestressed steel strand quick positioning and locking device according to claim 5, characterized in that, The locking structure (8) includes a first internal threaded ring (81), a second internal threaded ring (82), four sliding grooves (83), four sets of inserts (84), and several steel balls (85). The first internal threaded ring (81) and the second internal threaded ring (82) are respectively opened at both ends of the inner shell (7). The four sliding grooves (83) are equally spaced on the outer wall of the anchor sleeve (2) and extend to the outer arc surface of the four sets of clamps (4). The inner arc surface of the four sets of inserts (84) slides and fits against the inner bottom of both ends of the four sliding grooves (83), and several steel balls (85) are equally spaced on the outer arc surface and respectively engage with the inner interior of the first internal threaded ring (81) and the second internal threaded ring (82).

7. A modular prestressed steel strand quick positioning and locking device according to claim 6, characterized in that, The first internal thread ring (81) and the second internal thread ring (82) are mirror-symmetrical in their helical directions and are opposite to each other, similar to the configuration of a double-ended screw.

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