Prestressed anchor cable limiting device for green construction

Abstract

The invention belongs to the technical field of pre-stressed anchor cable construction, and discloses a pre-stressed anchor cable limiting device for green construction, which comprises an anchorage device, a plurality of insertion holes are formed in the anchorage device, clamping pieces matched with inner cavities in shape are arranged in the insertion holes, and a pair of symmetrical mounting grooves is formed in the inner walls of the insertion holes. According to the scheme, the pair of extrusion blocks is arranged in the penetrating hole, the end, with the small caliber, of the clamping piece is made to abut against the surface of the anchor cable all the time in the anchor cable stretching process, and therefore the clamping piece can be clamped by the clamping piece at the moment when the anchor cable rebounds; when the anchor cable is inserted into the inserting hole, the clamping piece is driven to move into the inserting hole immediately through friction force, so that the clamping piece completely enters the inserting hole at the highest speed and deforms, the anchor cable is fixed immediately under the extrusion action of the clamping piece after rebounding for a small distance, the loss of prestress is effectively reduced, and the construction quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed anchor cable construction, and particularly to a prestressed anchor cable limiting device for green construction. Background Technique

[0002] A prestressed anchor cable is a prestressed component used in concrete structures. It is usually composed of steel wires or steel strands. By applying a predetermined tension, the concrete component is prestressed in advance to enhance the bearing capacity and crack resistance of the concrete component.

[0003] During the construction process of prestressed anchor cables, the anchor cables exposed outside the building need to use installation anchor fittings. The anchor fittings are provided with multiple holes for inserting the anchor cables. Construction workers insert the anchor cables into the holes and install wedge-shaped clips in the holes. The wedge-shaped clips are generally conical and sleeved outside the anchor cables. Construction workers pull the anchor cables through a jack to apply prestress to them. During the pulling process, the wedge-shaped clips will break away from the holes, enabling the anchor cables to be pulled. When the stress reaches the required value, the user removes the jack. At this time, the stretched anchor cables contract into the holes under the action of their own elastic force, thereby driving the wedge-shaped clips into the holes and tightly squeezing against the inner walls of the holes. As a result, the conical wedge-shaped clips are deformed and the anchor cables are clamped and fixed.

[0004] In the actual construction process, when the jack is removed, the wedge-shaped clips rely on the friction force generated with the anchor cables during the rebound of the anchor cables to be brought into the holes. Then, the wedge-shaped clips are deformed by squeezing between the inner walls of the holes and the anchor cables, and the friction force becomes larger and larger, eventually fixing the anchor cables. When the anchor cables are stretched, there is almost no friction force between the undeformed wedge-shaped clips and the anchor cables. This results in that when the anchor cables rebound, they will not immediately drive the wedge-shaped clips to move, and the wedge-shaped clips will stay outside the holes for a short time. It is precisely the existence of this period of time that will cause the anchor cables to rebound more distance into the building, resulting in the loss of prestress. Summary of the Invention

[0005] The present invention aims to provide a prestressed anchor cable limiting device for green construction to solve the problems raised in the above background technique. In this solution, a pair of extrusion blocks are arranged inside the insertion holes, forcing the smaller-diameter end of the wedge-shaped clips to always abut against the surface of the anchor cables during the stretching process of the anchor cables. Thus, at the moment when the anchor cables rebound, the wedge-shaped clips will be immediately driven into the insertion holes by the friction force, enabling the wedge-shaped clips to completely enter the inside of the insertion holes at the fastest speed and deform. Furthermore, the anchor cables are immediately fixed under the extrusion of the wedge-shaped clips after rebounding a short distance, effectively reducing the loss of prestress and improving the construction quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A prestressed anchor cable limit device for green construction, including an anchor fixture. A plurality of insertion holes are provided on the anchor fixture. Inside each of the plurality of insertion holes, there is a wedge-shaped grip that matches the shape of the inner cavity thereof. On the inner wall of the insertion hole, a pair of symmetrically arranged mounting grooves are provided. A pressing block is slidably connected in the mounting groove, and a spring is arranged inside the mounting groove. The two ends of the spring are respectively connected to the inner wall of the mounting groove and the pressing block. One end of a pair of the mounting grooves close to each other extends into the interior of the insertion hole.

[0008] Preferably, the wedge-shaped grip is arranged in a structure with a large end and a small end, and the inner wall of the insertion hole close to the wedge-shaped grip is arranged in an inclined structure that matches the wedge-shaped grip.

[0009] Preferably, the pressing block is arranged on the inclined part of the inner wall of the insertion hole and is close to the side with a smaller diameter.

[0010] Preferably, a pair of symmetrically arranged rectangular grooves are provided on the wedge-shaped grip from the end with a smaller diameter to the end with a larger diameter. The pair of rectangular grooves are arranged parallel to the axis of the wedge-shaped grip.

[0011] Preferably, a pair of symmetrically arranged positioning blocks are integrally formed at the outer end of the wedge-shaped grip. The pair of positioning blocks are both arranged parallel to the axis of the wedge-shaped grip, and the pair of positioning blocks and the pair of rectangular grooves are distributed in a cross shape with the wedge-shaped grip as the axis.

[0012] Preferably, a pair of symmetrically arranged positioning holes are provided on the inner wall of the insertion hole. The positioning holes match the positioning blocks, and the positioning holes and the pressing blocks are arranged at the same horizontal position.

[0013] Preferably, the outer end of the wedge-shaped grip is provided with a smooth surface, and the inner wall of the wedge-shaped grip is provided with a dense anti-slip groove.

[0014] Preferably, the end of the pressing block close to the wedge-shaped grip is arranged in an arc structure.

[0015] The beneficial effects of this technical solution compared with the prior art:

[0016] In this solution, by arranging a pair of pressing blocks inside the insertion hole, it is forced that the end with a smaller diameter of the wedge-shaped grip always abuts against the surface of the anchor cable during the stretching process of the anchor cable. Thus, at the moment when the anchor cable rebounds, the wedge-shaped grip will be immediately driven to move into the insertion hole by the frictional force, enabling the wedge-shaped grip to completely enter the interior of the insertion hole at the fastest speed and deform. Furthermore, the anchor cable is immediately fixed under the extrusion of the wedge-shaped grip after rebounding a short distance, effectively reducing the loss of prestress and improving the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the first overall structural schematic diagram provided by the present invention;

[0018] Figure 2 The second overall structural schematic diagram provided by the present invention;

[0019] Figure 3 The internal structural schematic diagram of the wedge provided by the present invention;

[0020] Figure 4 The internal structural schematic diagram of the insertion hole provided by the present invention.

[0021] Reference numerals: 1, anchor; 2, insertion hole; 3, wedge; 4, installation groove; 5, extrusion block; 6, spring; 7, rectangular groove; 8, positioning block; 9, positioning hole. Specific embodiments

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0023] As Figures 1-4 shown, a prestressed anchor cable limiting device for green construction includes an anchor 1. A plurality of insertion holes 2 are formed in the anchor 1. A wedge 3 matching the inner cavity shape is arranged inside each of the plurality of insertion holes 2. A pair of symmetrically arranged installation grooves 4 are formed on the inner wall of the insertion hole 2. An extrusion block 5 is slidably connected in the installation groove 4, and a spring 6 is arranged inside the installation groove 4. Two ends of the spring 6 are respectively connected with the inner wall of the installation groove 4 and the extrusion block 5. One end of the pair of installation grooves 4 close to each other extends into the insertion hole 2. The wedge 3 is arranged in a large-small head structure, and the inner wall of the insertion hole 2 close to the wedge 3 is arranged in an inclined structure matching the wedge 3.

[0024] In this solution, when constructing prestressed anchor cables, the user will respectively pass multiple anchor cables exposed on the outside of the building into multiple insertion holes 2, so that the anchor 1 is in contact with the outer surface of the building, and multiple clips 3 are sleeved on the outer ends of the anchor cables, and the clips 3 are inserted into the insertion holes 2, so that the end with the smaller diameter of the clip 3 is squeezed between a pair of extrusion blocks 5. At this time, the extrusion block 5 is squeezed into the installation groove 4 by the clip 3, causing the spring 6 to be squeezed. The pair of extrusion blocks 5 are squeezed on the outer surface of the clip 3 under the elastic force of the spring 6. According to the construction steps of the prestressed anchor cable, the user needs to install a baffle on the side of the outer end of the anchor 1 close to the clip 3, and then pull multiple anchor cables through the jack. The anchor cables are stretched and the clip 3 is driven to move to the outside of the insertion hole 2, but limited by the baffle, the clip 3 will not completely detach from the insertion hole 2. The clip 3 has a smaller diameter. One end of the clamp will always be clamped between a pair of extrusion blocks 5, and then the inner wall of the smaller end of the clamp 3 will always abut against the outer end of the anchor cable, and at the same time will not hinder the anchor cable from stretching outward. When the prestressing force reaches the requirement, the user removes the jack. At this time, the anchor cable rebounds to the inside of the building under the action of its own elastic force. Since the inner wall of the smaller end of the clamp 3 always abuts against the surface of the anchor cable, the rebounding anchor cable will immediately drive the clamp 3 to move into the insertion hole 2 through friction at the moment of rebound, and then the clamp 3 is squeezed by the inner wall of the insertion hole 2 during the movement and deformed, and then tightly squeezed between the inner wall of the insertion hole 2 and the anchor cable, to achieve rapid fixation of the anchor cable. With this arrangement, the clamp 3 can fully enter the interior of the insertion hole 2 at the fastest speed, so that the anchor cable is immediately fixed after rebounding a short distance, reducing the loss of prestress.

[0025] The extrusion block 5 is disposed on the inclined portion of the inner wall of the insertion hole 2 and is close to the side with a smaller diameter.

[0026] The position of the extrusion block 5 in the present solution is set so that it can always abut against the end of the clip 3 with a smaller diameter during the anchor cable stretching process, ensuring that the clip 3 remains connected to the anchor cable. At the same time, after the clip 3 completely enters the insertion hole 2 and is deformed, a pair of clips 3 are still squeezed at the outer end of the clip 3 under the elastic force of the spring 6, which can improve the tightness of the connection between the inner wall of the clip 3 and the anchor cable.

[0027] A pair of mutually symmetrical rectangular grooves 7 are provided on the clip 3 from the end with a smaller diameter to the end with a larger diameter, and the pair of rectangular grooves 7 are arranged parallel to the axis of the clip 3 .

[0028] In this solution, a pair of rectangular grooves 7 on the clip 3 provide space for the clip 3 to deform, so that when the clip 3 moves into the insertion hole 2, the end with a smaller diameter will shrink inwardly to clamp the anchor cable.

[0029] A pair of symmetric positioning blocks 8 are integrally formed at the outer end of the wedge 3. The pair of positioning blocks 8 are arranged parallel to the axis of the wedge 3, and the pair of positioning blocks 8 and the pair of rectangular grooves 7 are distributed in a cross shape with the wedge 3 as the axis. A pair of symmetric positioning holes 9 are provided on the inner wall of the insertion hole 2. The positioning holes 9 are matched with the positioning blocks 8, and the positioning holes 9 and the extrusion blocks 5 are arranged at the same horizontal position.

[0030] In this solution, the setting of the pair of positioning blocks 8 and the pair of positioning holes 9 can provide a positioning function when the wedge 3 is inserted into the insertion hole 2. The user inserts the wedge 3 into the insertion hole 2 according to the positions of the positioning blocks 8 and the positioning holes 9, so that the pair of extrusion blocks 5 and the pair of rectangular grooves 7 are distributed in a cross shape, thereby ensuring that the pair of extrusion blocks 5 can squeeze the end of the wedge 3 inward to make it abut against the surface of the anchor cable. And the positioning holes 9 and the extrusion blocks 5 are arranged at the same horizontal position, which can ensure that the clamping of the positioning blocks 8 and the positioning holes 9 will not hinder the deformation of the wedge 3.

[0031] The outer end of the wedge 3 is provided with a smooth surface, and a dense anti-slip groove is provided on the inner wall of the wedge 3.

[0032] In this solution, the outer end of the wedge 3 being provided with a smooth surface can reduce the friction between the outer end of the wedge 3 and the inner wall of the insertion hole 2, prompting the wedge 3 to quickly enter the inside of the insertion hole 2 and quickly deform under the extrusion of the inner wall of the insertion hole 2. The anti-slip grooves provided on the inner wall of the wedge 3 can strengthen the friction between the inner wall of the wedge 3 and the anchor cable, ensuring that the anchor cable can quickly drive the wedge 3 to move, and at the same time can also improve the stability of the anchor cable after being completely fixed.

[0033] One end of the extrusion block 5 close to the wedge 3 is provided with an arc structure.

[0034] In this solution, one end of the extrusion block 5 close to the wedge 3 is provided with an arc structure. With this setting, when the wedge 3 is pushed towards the inner side of the insertion hole 2 during transportation, the wedge 3 can easily push open the pair of extrusion blocks 5 and squeeze into the space between the pair of extrusion blocks 5.

[0035] The specific implementation process is as follows:

[0036] When constructing prestressed anchor cables, the user first inserts multiple anchor cables exposed on the outside of the building into multiple insertion holes 2 respectively, so that the anchor 1 abuts against the outer surface of the building, and sleeves multiple clips 3 on the outer ends of the anchor cables, and then inserts the clips 3 into the insertion holes 2. When inserting, the positioning blocks 8 and the positioning holes 9 should be snapped into place to ensure that the clips 3 are in the correct position, and then the clips 3 are pushed into the insertion holes 2 until the end with a smaller diameter of the clip 3 pushes away a pair of extrusion blocks 5 and squeezes in between the pair of extrusion blocks 5. The extrusion blocks 5 are squeezed into the installation groove 4 by the clip 3, causing the spring 6 to be squeezed. The pair of extrusion blocks 5 are squeezed on the outer surface of the clip 3 under the elastic force of the spring 6, causing the end with a smaller diameter of the clip 3 to shrink inward and abut against the surface of the anchor cable, and then the anchor is fixed. A baffle is installed on one side of the outer end of 1 close to the clip 3, and multiple anchor cables are pulled by the jack. The anchor cable is stretched and drives the clip 3 to move to the outside of the insertion hole 2. Restricted by the baffle, the clip 3 will not completely leave the insertion hole 2, and the end of the clip 3 with a smaller diameter will always be clamped between a pair of extrusion blocks 5, and then the inner wall of the end of the clip 3 with a smaller diameter will always abut against the outer end of the anchor cable. When the prestress reaches the requirement, the user removes the jack. At this time, the anchor cable rebounds to the inside of the building under the action of its own elastic force. The rebounding anchor cable will immediately drive the clip 3 to move into the insertion hole 2 through friction at the moment of rebound, so that the clip 3 is squeezed by the inner wall of the insertion hole 2 during the movement and deformed, and then tightly squeezed between the inner wall of the insertion hole 2 and the anchor cable, so as to achieve rapid fixation of the anchor cable.

[0037] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A prestressed anchor cable limiting device for green construction, characterized in that: The invention comprises an anchor (1), wherein a plurality of through holes (2) are provided on the anchor (1), and each of the plurality of through holes (2) is provided with a clip (3) matching the shape of the inner cavity, and a pair of mutually symmetrical mounting grooves (4) are provided on the inner wall of the through hole (2), and an extrusion block (5) is slidably connected in the mounting groove (4), and a spring (6) is provided in the mounting groove (4), and the two ends of the spring (6) are respectively connected to the inner wall of the mounting groove (4) and the extrusion block (5), and the ends of the pair of mounting grooves (4) close to each other extend to the inside of the through hole (2).

2. A prestressed anchor cable limiting device for green construction as claimed in claim 1, characterized in that: The clip (3) is configured as a large and small head structure, and the inner wall of the insertion hole (2) on a side close to the clip (3) is configured as an inclined structure matching the clip (3).

3. A prestressed anchor cable limiting device for green construction as claimed in claim 1, characterized in that: The extrusion block (5) is arranged on the inclined portion of the inner wall of the insertion hole (2) and is close to the side with a smaller diameter.

4. A prestressed anchor cable limiting device for green construction as claimed in claim 1, characterized in that: A pair of mutually symmetrical rectangular grooves (7) are provided on the clamping piece (3) from the end with a smaller diameter to the end with a larger diameter, and the pair of rectangular grooves (7) are arranged parallel to the axis of the clamping piece (3).

5. The prestressed anchor cable limiting device for green construction according to claim 1, characterized in that: A pair of mutually symmetrical positioning blocks (8) are integrally formed at the outer end of the clip (3); the pair of positioning blocks (8) are both arranged parallel to the axis of the clip (3); and the pair of positioning blocks (8) and the pair of rectangular grooves (7) are distributed in a cross shape with the clip (3) as the axis.

6. A prestressed anchor cable limiting device for green construction as claimed in claim 1, characterized in that: A pair of mutually symmetrical positioning holes (9) are provided on the inner wall of the insertion hole (2), the positioning holes (9) match the positioning blocks (8), and the positioning holes (9) and the extrusion blocks (5) are arranged at the same horizontal position.

7. A prestressed anchor cable limiting device for green construction as claimed in claim 1, characterized in that: The outer end of the clip (3) is arranged to have a smooth surface, and the inner wall of the clip (3) is provided with densely distributed anti-slip grooves.

8. The prestressed anchor cable limiting device for green construction according to claim 1, characterized in that: One end of the extrusion block (5) close to the clamping piece (3) is arranged as an arc-shaped structure.

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