A prestressed tendon auxiliary positioning structure and a matched penetrating sleeve head

Abstract

The application provides a prestressed steel bar auxiliary positioning structure and a matched threading sleeve head, the auxiliary positioning structure comprises a guide cylinder and a clamping mechanism, the clamping mechanism is used for being arranged on a steel bar, a plurality of first recesses are arranged on the outer wall of the guide cylinder, the bottom of the first recess is communicated with the inside of the guide cylinder through a first circular hole; a sleeve assembly is mounted on the outside of the guide cylinder, a plurality of second recesses are arranged on the inner wall of the sleeve assembly, a ball is clamped and placed between the corresponding first recess and the second recess, and the ball extends into the inside of the guide cylinder through the first circular hole; the threading sleeve head is fixed on the prestressed steel bar inserted into the sleeve through a plurality of pointed screws; the auxiliary positioning structure can be arranged on a steel bar structure, and positioning and auxiliary moving effects are provided for subsequent laying of the prestressed steel bar; the threading sleeve head can be mounted on the end of the prestressed steel bar, the loosening of the steel wire rope at the end of the prestressed steel bar is prevented, the threading is dragged, the auxiliary positioning structure is passed through, and operation construction is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of prestressed tendon construction auxiliary tool, more particularly, to a prestressed tendon auxiliary positioning structure and a matched threading sleeve head. BACKGROUND

[0002] When doing cast-in-place concrete floor, first, at least one layer of bottom steel bars needs to be laid on the formwork, the bottom steel bars are laid as a grid-shaped network, then a prestressed beam or other beam is placed on the bottom steel bars, then top steel bars are laid on the prestressed beam, and finally concrete pouring is carried out; wherein, the prestressed beam mainly needs to be threaded with prestressed tendons, and currently, the construction is mostly directly inserted in the steel bar frame, but since the prestressed tendon itself has a certain weight, and is in contact with the steel bar frame during the insertion process, a larger force needs to be applied for dragging and moving, which is more troublesome to operate, thereby affecting the overall efficiency, and needs to be improved. SUMMARY

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the present application is to provide a prestressed tendon auxiliary positioning structure and a matched threading sleeve head, the auxiliary positioning structure can be erected on the steel bar structure to provide positioning and auxiliary moving effect for subsequent prestressed tendon laying, and the threading sleeve head can be installed at the end of the prestressed tendon to prevent the loosening of the steel wire rope at the end of the prestressed tendon from affecting the threading dragging, so as to pass through the auxiliary positioning structure and facilitate operation and construction.

[0004] To achieve this purpose, the technical scheme adopted by the present application is as follows:

[0005] The present application provides a prestressed tendon auxiliary positioning structure, which comprises a guide cylinder, clamping mechanisms installed at the top of both ends of the guide cylinder, the clamping mechanisms being used for being erected on the steel bars and being tightened towards the middle part; the outer wall of the guide cylinder is provided with a plurality of first grooves, the groove bottoms of the first grooves being communicated with the inside of the guide cylinder through first circular holes, and the first grooves being arc-shaped groove structures in the shape of a spherical cap; a sleeve assembly is installed outside the guide cylinder, the inner wall of the sleeve assembly is provided with a plurality of second grooves in correspondence, the second grooves are arc-shaped groove structures in the shape of a spherical cap, and are adapted in shape to the first grooves; a plurality of balls are clamped and placed between the corresponding first grooves and second grooves, and the balls extend into the inside of the guide cylinder through the first circular holes.

[0006] In the preferred technical scheme of the present application, the guide cylinder comprises a cylinder body and conical buckets fixed at both ends of the cylinder body, the conical buckets are expanded outward in the direction away from the cylinder body to form a guiding part that narrows towards the inside of the cylinder body; the first grooves are all arranged in the outer wall region of the cylinder body; the clamping mechanisms are installed at the top of the two conical buckets.

[0007] In the preferable technical scheme of the present application, the first sink is in multiple groups, multiple first sink groups are evenly spaced along the length direction of the guide cylinder, and one first sink group includes multiple first sinks which are arranged in a circular array around the cylinder axis; the sleeve assembly includes two abutting sleeves, each sleeve includes an arc plate and two abutting plates fixed on both sides of the arc plate, multiple first through holes are arranged on the abutting plates, the inner diameter of the arc plate is matched with the outer diameter of the cylinder, and the second sink is arranged on the inner arc surface of the arc plate; the two sleeves are fixedly connected by multiple bolts penetrating the abutting plates to form a cylindrical sleeve assembly which is sleeved on the outside of the cylinder and abuts against the narrowed ends of the conical hopper.

[0008] In the preferable technical scheme of the present application, the outer wall of the flared end of the conical hopper is fixedly provided with a support ring, the top of the support ring is flush, the top surface of the support ring is provided with a guide groove, the end faces of the two ends of the guide groove are provided with clamping grooves, the clamping grooves extend through the outer wall of the support ring, and the top of the clamping groove penetrates the top surface of the support ring; the clamping mechanism includes a tension spring and two clamping hooks, the tension spring is arranged in the guide groove, one end of the clamping hook slides along the clamping groove and extends into the guide groove, and the ends of the two clamping hooks extending into the guide groove are connected by the tension spring; the top surfaces of the two support rings are fixedly provided with a cover plate by bolts, and the cover plate seals the top of the guide groove and the clamping groove.

[0009] In the preferable technical scheme of the present application, the clamping hook includes an L-shaped hook, a clamping strip fixedly arranged at one end of the L-shaped hook, and a limiting plate fixedly arranged at the end of the clamping strip; the shape of the clamping strip is matched with the shape of the clamping groove, and the clamping strip slides along the clamping groove; the shape of the limiting plate is matched with the shape of the guide groove, and the limiting plate slides along the guide groove; a pull ring is fixedly arranged on the wall surface of the limiting plate away from the clamping strip, and the end of the tension spring is buckled on the pull ring.

[0010] In the preferable technical scheme of the present application, the middle part of the cover plate is narrowed inward to form a hand holding part; a reinforcing rib is fixedly arranged on the bottom surface of the hand holding part, and the reinforcing rib extends along the length direction of the cover plate.

[0011] The present application also provides a penetrating sleeve head used in conjunction with the prestressed tendon auxiliary positioning structure, which includes a sleeve pipe with one end sealed, and the minimum contour formed by multiple rolling balls installed in the same first sink group is greater than the outer diameter of the sleeve pipe; the sealed end of the sleeve pipe is narrowed away from the center of the sleeve pipe; multiple countersunk holes are arranged on the outer wall of the sleeve pipe, the countersunk holes are used for installing pointed screws to fix the prestressed tendon inserted into the sleeve pipe.

[0012] The present application has the following advantages:

[0013] The application provides a prestressed steel bar auxiliary positioning structure and a matched threading sleeve head.

[0014] The outer wall of the guide cylinder is provided with a plurality of first grooves, the groove bottoms of the first grooves are communicated with the inside of the guide cylinder through first circular holes, and the first grooves are arc groove structures in the shape of spherical caps; the outside of the guide cylinder is provided with a sleeve assembly, the inner wall of the sleeve assembly is correspondingly provided with a plurality of second grooves, the second grooves are arc groove structures in the shape of spherical caps, and are matched with the shapes of the first grooves; a plurality of rolling balls are rolled and clamped between the corresponding first grooves and the second grooves, the rolling balls extend into the inside of the guide cylinder through the first circular holes; the plurality of rolling balls form an auxiliary moving channel in the inside of the guide cylinder, facilitate the rapid passing of the prestressed steel bar, and can reduce the moving friction, and have the effect of auxiliary movement.

[0015] The threading sleeve head comprises a sleeve pipe with one end blocked, the outer wall of the sleeve pipe is provided with a plurality of countersunk holes, the countersunk holes are used for installing pointed head screws, and the prestressed steel bars inserted into the sleeve pipe are fixed; the simple assembly structure can enable the threading sleeve head to be installed at the end of the prestressed steel bar, on one hand, can prevent the loosening of the steel wire rope at the end of the prestressed steel bar from affecting threading, and on the other hand, can facilitate the smooth threading of the threading sleeve head through the guide cylinder, is convenient for operation construction, and improves the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a first perspective view of a prestressed steel bar auxiliary positioning structure provided in the specific embodiment of the application;

[0017] Figure 2 is a second perspective view of a prestressed steel bar auxiliary positioning structure provided in the specific embodiment of the application;

[0018] Figure 3 is a perspective development structure diagram of a prestressed steel bar auxiliary positioning structure provided in the specific embodiment of the application;

[0019] Figure 4 is a perspective structure diagram of a guide cylinder provided in the specific embodiment of the application;

[0020] Figure 5 is a perspective structure diagram of a sleeve assembly provided in the specific embodiment of the application;

[0021] Figure 6 is a perspective structure diagram of a hook provided in the specific embodiment of the application;

[0022] Figure 7 This is a three-dimensional structural diagram of the cover plate provided in a specific embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the three-dimensional unfolded structure of the threading sleeve provided in a specific embodiment of the present invention.

[0024] In the picture:

[0025] 100. Guide cylinder; 110. First settling tank; 120. First circular hole; 130. Cylinder body; 140. Conical hopper; 150. Support ring; 160. Guide groove; 170. Slot;

[0026] 200. Clamping mechanism; 210. Tension spring; 220. Hook; 221. L-shaped hook; 222. Locking strip; 223. Limiting plate; 224. Pull ring;

[0027] 300. Sleeve assembly; 310. Second countersink; 320. Kit; 321. Arc plate; 322. Butt plate; 400. Ball bearing;

[0028] 500. Cover plate; 510. Hand grip; 520. Reinforcing rib; 530. Raised strip;

[0029] 600, sleeve; 610, countersunk hole; 620, pointed screw. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 5 As shown, a specific embodiment of the present invention discloses a prestressed tendon auxiliary positioning structure, including a guide cylinder 100 and a clamping mechanism 200 installed at the top of both ends of the guide cylinder 100. The clamping mechanism is used to support the steel bar and tighten towards the center. The outer wall of the guide cylinder 100 is provided with a plurality of first grooves 110. The bottom of the first groove 110 is connected to the inside of the guide cylinder 100 through a first circular hole 120. The first groove is a spherical crown-shaped arc groove structure.

[0032] A sleeve assembly 300 is installed on the outside of the guide cylinder 100. The inner wall of the sleeve assembly 300 is provided with a plurality of second sink grooves 310. The second sink groove is a spherical crown-shaped arc groove structure and is adapted to the shape of the first sink groove.

[0033] A ball bearing 400 is rolled and held between the corresponding first sink 110 and second sink 310, and the ball bearing 400 extends into the interior of the guide cylinder 100 through the first round hole 120.

[0034] The prestressed steel bar auxiliary positioning structure comprises a guide cylinder, clamping mechanisms installed on the top of both ends of the guide cylinder, the clamping mechanisms are used for being arranged on the steel bars and being tightened towards the middle part, the clamping mechanisms are used for enabling the entire auxiliary positioning structure to be arranged on the steel bar structure, and a foundation for subsequent laying of the prestressed steel bar is provided.

[0035] The outer wall of the guide cylinder is provided with a plurality of first grooves, the groove bottoms of the first grooves are communicated with the inside of the guide cylinder through first circular holes, and the first grooves are arc-shaped groove structures in the shape of a spherical cap; the guide cylinder is externally provided with a sleeve assembly, the inner wall of the sleeve assembly is correspondingly provided with a plurality of second grooves, the second grooves are arc-shaped groove structures in the shape of a spherical cap, and the shapes of the second grooves are matched with those of the first grooves; a plurality of rolling balls are rolled and clamped between the corresponding first grooves and the second grooves, the rolling balls extend into the inside of the guide cylinder through the first circular holes; the plurality of rolling balls form an auxiliary moving channel in the inside of the guide cylinder, the channel facilitates the rapid movement of the prestressed steel bar, reduces the moving friction, and has an auxiliary moving effect.

[0036] Further, as shown in Figure 4 The guide cylinder 100 comprises a cylinder body 130 and conical hoppers 140 fixedly arranged at both ends of the cylinder body 130, the conical hoppers are outwardly expanded in the direction away from the cylinder body, and form a guide part that is narrowed towards the inside of the cylinder body, which is more convenient for the prestressed steel bar to be inserted from the end part; the first grooves 110 are all arranged on the outer wall region of the cylinder body 130, and are installed on the relatively flat cylinder region, which is convenient for the rolling balls to be arranged and limited; the clamping mechanisms 200 are installed on the top of the two conical hoppers 140, so that the part matched with the steel bar has a certain spacing with the guide cylinder, the prestressed steel bar is prevented from being too close to the position of the steel bar, the prestressed steel bar is better embedded in the inside of the concrete, and stable connection is realized.

[0037] Further, the first grooves 110 are distributed in multiple groups, a plurality of first groove groups are uniformly and interval arranged along the length direction of the guide cylinder, one first groove group comprises a plurality of first grooves that are circumferentially and arrayed around the cylinder body axis, the rolling support of multiple points is realized, and the surrounding auxiliary movement is realized; the sleeve assembly 300 comprises two abutting sleeves 320, as Figure 5As shown, the sleeve set 320 includes an arc-shaped plate 321, and butt plates 322 fixed on both sides of the arc-shaped plate 321, the butt plates are provided with a plurality of first through holes, the inner diameter of the arc-shaped plate 321 is matched with the outer diameter of the barrel 130, and the second recess 310 is arranged on the inner arc surface of the arc-shaped plate 321; the two sleeve sets are fixedly connected by a plurality of bolts penetrating through the butt plates, forming a sleeve assembly in a barrel shape, which is sleeved and mounted on the outside of the barrel and abuts against the narrowed ends of the cone hopper respectively; the sleeve assembly is a split assembly structure, which is convenient for assembly, placing of the balls inside and actual processing and production; during assembly, the balls can be placed in the second recess of one sleeve set first, then the guide cylinder is placed on the sleeve set, so that the balls correspond to the first recess at the bottom of the guide cylinder; then the balls are placed in the first recess at the top position of the guide cylinder, and finally the other sleeve set is covered on the top of the guide cylinder, so that the balls at the top position are clamped into the corresponding second recess, and the two sleeve sets are fixedly connected by bolts to complete the assembly; it should be noted that a tool clamp with magnetic attraction performance can be arranged, so that the sleeve set is clamped in the tool clamp, and the connected sleeve set and guide cylinder also have a certain magnetism, which can have a certain adsorption effect on the balls to prevent the balls from falling easily during installation.

[0038] Further, as shown in Figure 4 The flared end outer wall of the cone hopper 140 is fixedly provided with a support ring 150, which can strengthen the structural strength of the end position and provide space for adding other structural components; the top of the support ring is flush, the top surface of the support ring 150 is provided with a guide groove 160, the end surfaces of the two ends of the guide groove 160 are provided with clamping grooves 170, the clamping grooves extend through the outer wall of the support ring, and the top of the clamping grooves penetrates through the top surface of the support ring; as shown in Figure 3 The clamping mechanism 200 includes a tension spring 210 and two clamping hooks 220, the tension spring 210 is arranged in the guide groove 160, one end of the clamping hook slides along the clamping groove and extends into the guide groove, the ends of the two clamping hooks 220 extending into the guide groove 160 are connected by the tension spring 210, the top surfaces of the two support rings 150 are fixedly provided with a cover plate 500 by bolts, and the cover plate 500 seals the top of the guide groove 160 and the clamping groove 170; during actual installation, the clamping mechanism can be completed first, and then the cover plate is installed to limit the top of the clamping hook and the tension spring, so that the clamping hook and the tension spring cannot be separated from the guide groove.

[0039] Further, as shown in Figure 6As shown, the clamping hook 220 comprises an L-shaped hook 221, a clamping strip 222 fixed at one end of the L-shaped hook 221, and a limiting plate 223 fixed at the end of the clamping strip 222; the shape of the clamping strip 222 is matched with the shape of the clamping groove 170, and the clamping strip slides along the clamping groove; the shape of the limiting plate 223 is matched with the shape of the guide groove 160, and the limiting plate slides along the guide groove; through the double sliding limitation, the movement of the clamping hook can be further limited, the pre-tightening force of the tension spring in a preset direction is ensured, the required clamping effect is ensured, and damage caused by irregular deformation of the tension spring is prevented; the pull ring 224 is fixed on the wall surface away from the clamping strip 222 of the limiting plate 223, and the end of the tension spring is buckled on the pull ring, so that the clamping hook and the tension spring can be disassembled and assembled conveniently; the design of the L-shaped hook can form a clamping opening between the L-shaped hook and the side wall of the supporting ring, when the L-shaped hook is pulled outward, the tension spring is stretched, the tension spring generates an inward pulling force, the L-shaped hook is clamped on the steel bar, and stable framing is achieved.

[0040] Further, the bottom of the L-shaped hook is in an arc shape structure, the wall surface close to the supporting ring of the L-shaped hook is fixed with a protruding block, and the protruding block is in an outward protruding arc shape structure, which can play a clamping effect, prevent the steel bar from being easily separated from the L-shaped hook, and strengthen the overall clamping effect.

[0041] Further, as shown in the drawings, Figure 7 The middle part of the cover plate 500 is narrowed inwardly to form a hand holding part 510, and the bottom surface of the hand holding part 510 is fixed with a reinforcing rib 520 extending along the length direction of the cover plate; since a large space is left between the cover plate and the barrel, the setting of the hand holding part at this position does not affect normal grasping and taking, effectively improves the utilization of space, and is convenient for actual operation and use.

[0042] Further, the bottom of the reinforcing rib is in an arc shape structure, which can not only strengthen the overall structural strength, but also facilitate grasping and prevent scratches on the hands; in addition, the bottom of each end of the cover plate is fixed with a protruding strip 530, the minimum distance between the two protruding strips is matched with the maximum distance between the two supporting rings, and the protruding strips abut against the outer wall surface of the supporting rings; the setting of the two protruding strips can not only strengthen the overall structural strength of the cover plate, but also facilitate alignment with the two supporting rings and alignment of the hole positions, so as to facilitate installation of the fixing bolts.

[0043] The present application also provides a penetrating sleeve head matched with the prestressed steel bar auxiliary positioning structure, as shown in the drawings, Figure 8As shown, the sleeve 600 is provided with a closed end, and the minimum profile formed by the plurality of balls 400 installed in the same first groove group is greater than the outer diameter of the sleeve 600; the closed end of the sleeve 600 is narrowed in the direction away from the center of the sleeve; the outer wall of the sleeve 600 is provided with a plurality of countersunk holes 610, and the countersunk holes 610 are used for installing pointed screws 620 to fix the prestressed steel bars inserted into the sleeve; the simple assembly structure can enable the threading sleeve head to be installed at the end of the prestressed steel bar, which can prevent the loosening of the steel wire rope at the end of the prestressed steel bar from affecting the threading, and can also facilitate the threading sleeve head to smoothly pass through the guide cylinder, thereby facilitating the operation construction and improving the efficiency.

[0044] Further, the countersunk holes are distributed in multiple groups, and the multiple groups of countersunk holes are uniformly and spacedly arranged along the length direction of the guide cylinder; one group of countersunk holes includes a plurality of countersunk holes arranged in a circumferential array around the sleeve axis, and the multiple pointed screws installed in the multiple groups of countersunk holes can provide multiple-point fixing for the prestressed steel bar, effectively prevent the threading sleeve head from being separated from the prestressed steel bar, maintain the assembly connection, facilitate the prestressed steel bar to pass through the auxiliary positioning structure, and facilitate the actual construction operation.

[0045] The present application is described by preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. The present application is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application are within the scope of protection of the present application.

Claims

1. A prestressed tendon auxiliary positioning structure, characterized in that: Includes a guide tube and a clamping mechanism installed at the top of both ends of the guide tube. The clamping mechanism is used to support the steel bar and tighten towards the center. The outer wall of the guide cylinder is provided with multiple first sink grooves. The bottom of the first sink groove is connected to the inside of the guide cylinder through a first circular hole. The first sink groove is a spherical crown-shaped arc groove structure. A sleeve assembly is installed on the outside of the guide cylinder. The inner wall of the sleeve assembly is provided with multiple second sink grooves. The second sink grooves are spherical arc-shaped groove structures that are adapted to the shape of the first sink groove. A ball bearing is rolled between the corresponding first and second settling tanks, and the ball bearing extends into the interior of the guide cylinder through the first round hole.

2. The prestressed tendon auxiliary positioning structure according to claim 1, characterized in that: The guide cylinder includes a cylinder body and conical hoppers fixed at both ends of the cylinder body. The conical hoppers expand outward in a direction away from the cylinder body to form a guide portion that narrows and guides the cylinder body inward. The first settling tank is located on the outer wall area of ​​the cylinder body. The clamping mechanism is installed at the top of the two cone-shaped buckets.

3. The prestressed tendon auxiliary positioning structure according to claim 2, characterized in that: The first settling tank is distributed in multiple groups, and multiple first settling tank groups are evenly spaced along the length direction of the guide tube. One first settling tank group includes multiple first settling tanks distributed in a circular array around the axis of the tube. The sleeve assembly includes two mating parts, each part including an arc-shaped plate and mating plates fixed on both sides of the arc-shaped plate. The mating plates are provided with multiple first through holes. The inner diameter of the arc-shaped plate is adapted to the outer diameter of the cylinder. A second groove is provided on the inner arc surface of the arc-shaped plate. The two parts are fixedly connected by multiple bolts passing through the mating plates to form a cylindrical sleeve assembly, which is fitted and installed on the outside of the cylinder, with both ends abutting against the narrowing end of the conical hopper.

4. The prestressed tendon auxiliary positioning structure according to claim 3, characterized in that: A support ring is fixedly provided on the outer wall of the flared end of the cone. The top of the support ring is flush with the top surface of the support ring. A guide groove is provided on the top surface of the support ring. A slot is provided on both ends of the guide groove. The slot extends through the outer wall of the support ring, and the top of the slot penetrates the top surface of the support ring. The clamping mechanism includes a tension spring and two hooks. The tension spring is located inside the guide groove, and one end of each hook slides along the groove and extends into the guide groove. The ends of the two hooks that extend into the guide groove are connected by the tension spring. The top surfaces of the two support rings are fixed with cover plates by bolts, which seal the top of the guide groove and the slot.

5. The prestressed tendon auxiliary positioning structure according to claim 4, characterized in that: The hook includes an L-shaped hook, a locking strip fixedly disposed at one end of the L-shaped hook, and a limiting plate fixedly disposed at the end of the locking strip; the shape of the locking strip is adapted to the shape of the locking groove, and the locking strip slides along the locking groove; the shape of the limiting plate is adapted to the shape of the guide groove, and the limiting plate slides along the guide groove; a pull ring is fixedly disposed on the wall surface of the limiting plate away from the locking strip, and the end of the tension spring is fastened to the pull ring.

6. The prestressed tendon auxiliary positioning structure according to claim 5, characterized in that: The middle of the cover plate narrows inward to form a grip area; The bottom surface of the grip is fixed with reinforcing ribs that extend along the length of the cover plate.

7. A threading sleeve for use in conjunction with the prestressed tendon auxiliary positioning structure according to any one of claims 3-6, characterized in that: The sleeve, including one end of which is sealed, has a minimum profile formed by multiple balls installed in the same first settling tank that is larger than the outer diameter of the sleeve; the sealed end of the sleeve narrows away from the center of the sleeve. The outer wall of the sleeve is provided with multiple countersunk holes, which are used to install pointed screws to fix the prestressing tendons inserted in the sleeve.

Images