Self-adaptive anchor withdrawing base and anchor withdrawing device for double-top anchor withdrawing

Abstract

The utility model provides a self-adaptive anchor withdrawing base and an anchor withdrawing device for double-top anchor withdrawing. The self-adaptive anchor withdrawing base and the anchor withdrawing device are used for solving the problem that in the prior art, the contact end of the anchor withdrawing base and concrete cannot adapt to the inclination of the surface of the concrete. The base comprises a base body, a supporting piece and a driving assembly. The base body is of a hollow circular-truncated-cone-shaped structure, and the supporting piece and the driving assembly are arranged at the large end of the base body. The large end of the base body is connected with a preset supporting face through a supporting piece, and the small end of the base body is used for being connected with a center hole jack. The supporting piece is rotationally connected with the base body; the driving assembly comprises a transmission part, the transmission part is rotationally connected with the supporting part, and an included angle formed by the central axis of the transmission part and the central line of the base body is an acute angle; the driving assembly drives the transmission part to move to change the included angle between the supporting part and the base body, so that the supporting part can adapt to preset supporting faces inclined at different angles and can be repeatedly used after being machined and formed, the construction cost is reduced, and the construction progress is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of prestressed steel strand anchor withdrawal, in particular to an adaptive anchor withdrawal base and an anchor withdrawal device for double-top anchor withdrawal. Background Art

[0002] Prestressed steel strand is a stranded steel cable composed of 2, 3, 7 or 19 high-strength steel wires. After stress relief treatment (stabilization treatment), it is suitable for prestressed concrete and similar purposes. In the prior art, there is a double-top anchor withdrawal device for prestressed steel strand, which includes an anchor withdrawal base, a through-type jack, a working anchor and a front-clip jack. The side of the anchor withdrawal base is usually provided with a working hole. Through the cooperation of the four, the operator can replace the working clip of the working anchor through the working hole to achieve anchor withdrawal.

[0003] In this method, the anchor withdrawal base is usually a prefabricated part, and the contact end of the anchor withdrawal base and the concrete surface is usually a flat surface. However, in the actual construction environment, the concrete surface where the working anchor is installed usually has a certain inclination angle. Therefore, in the actual construction process, the operator usually adds a gasket to the contact end of the anchor withdrawal base and the concrete surface when installing the anchor withdrawal base, so that the anchor withdrawal base can adapt to the inclination angle of the concrete surface.

[0004] When the prestressed steel strand is double-topped and anchored, the anchoring base, as the main load-bearing component, usually bears a large force. After bearing the force, the force is transmitted to the concrete surface through the gasket. However, during installation, due to improper installation by the operator or after installation, the friction between the gasket and the concrete surface or the anchoring base is too small, the relative position of the gasket relative to the concrete surface or the anchoring base will change, which will cause the anchoring base to deviate from the inclined surface of the concrete, affecting the anchoring operation of the prestressed steel strand. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an adaptive anchor removal base and an anchor removal device for double-top anchor removal, which is used to solve the problem in the prior art that the contact end of the anchor removal base and concrete cannot adapt to the inclination of the concrete surface.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides an adaptive anchor removal base, which includes: a base body, a support member, and a drive assembly; the base body is a hollow truncated cone structure, and the support member and the drive assembly are arranged on the large end of the base body; the large end of the base body is connected to a preset support surface through a support member, and its small end is used to connect to a through-type jack; the support member is rotatably connected to the base body; the drive assembly includes a transmission member, the transmission member is rotatably connected to the support member, and the angle formed by the central axis of the transmission member and the center line of the base body is an acute angle.

[0007] Optionally, a mounting portion is provided on the base body, and the mounting portion is an arc-shaped structure; a rotating portion is provided on the support member, and the rotating portion is an arc-shaped structure adapted to the mounting portion.

[0008] Optionally, a first mounting member is provided on the base body; a first rotating shaft is provided on the rotating portion of the support member, and the rotating portion of the support member is rotatably connected to the first mounting member via the first rotating shaft.

[0009] Optionally, the anchor unloading base also includes a second mounting member, the second mounting member is arranged at the large end of the base body, the driving assembly is arranged on the second mounting member, and the transmission member passes through the second mounting member and is rotatably connected to the support member; the angle formed by the straight line perpendicular to the connecting surface between the second mounting member and the driving assembly and the center line of the base body is an acute angle.

[0010] Optionally, a third mounting member is provided on the support member, and the third mounting member is provided at one end of the support member close to the base body. An avoidance portion is provided on the base body, and the transmission member passes through the avoidance portion and is rotatably connected to the third mounting member.

[0011] Optionally, there are two third mounting members; and waist-shaped holes are provided on the third mounting members;

[0012] The driving assembly also includes a second rotating shaft arranged on the transmission member, and the transmission member is rotatably connected to the third mounting member through the second rotating shaft; one end of the second rotating shaft is arranged in the waist-shaped hole of a third mounting member, and the other end is arranged in the waist-shaped hole of another third mounting member.

[0013] Optionally, the driving assembly includes a driving member, and the driving member is used to drive the transmission member to move linearly;

[0014] The driving element is a linear motor or a cylinder.

[0015] Optionally, a fixing member is further provided on the support member, and the fixing member is used to fix the support member on a preset support surface.

[0016] Optionally, the fixing member is a ground nail and / or a bolt arranged on the side surface of the supporting member away from the small end of the base body.

[0017] The present utility model further provides an anchor withdrawing device for double-top anchor withdrawal, which includes an adaptive anchor withdrawing base as described above, and also includes a hole-piercing jack, a tool anchor and a front clamping jack; the hole-piercing jack is sleeved on the prestressed steel strand, one end of which is connected to the small end of the anchor withdrawing base, and the other end is connected to the tool anchor; the tool anchor is arranged on the prestressed steel strand; the front clamping jack is arranged on the prestressed steel strand, and one end of which is connected to the end of the tool anchor away from the hole-piercing jack.

[0018] As described above, the adaptive anchor withdrawing base and the anchor withdrawing device for double-top anchor withdrawal of the present utility model have at least the following beneficial effects: by providing a support member and a driving component, the support member is rotatably connected to the base body; the driving component includes a transmission member, the transmission member is rotatably connected to the support member, and the included angle formed by the central axis of the transmission member and the center line of the base body is an acute angle. When facing a preset support surface with a certain inclination angle, the driving component can be used to drive the transmission member to move, and the transmission member drives the support member to rotate, so that the large end of the support member and the base body are inclined, so that the inclination angle of the support member matches the inclination angle of the preset support surface, and then the support member can be closely attached to the inclined preset support surface, so as to facilitate the installation of the anchor withdrawing base on the inclined preset support surface. Therefore, the anchor withdrawing base provided by the present utility model can adapt to preset support surfaces with different inclination angles after processing, and can be reused multiple times after being processed and formed, reducing the construction cost and ensuring the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It shows a schematic structural diagram of the anchor withdrawing base of the present utility model at an angle.

[0020] Figure 2 It shows a schematic structural diagram of the anchor withdrawing base of the present utility model at another angle.

[0021] Figure 3 It shows Figure 2 a cross-sectional view taken along A-A in

[0022] Figure 4 It shows a schematic structural diagram of the anchor withdrawing base of the present utility model at yet another angle.

[0023] Figure 5 It shows Figure 4 an enlarged view of part B in

[0024] Figure 6 It shows a schematic structural diagram of the anchor withdrawing device of the present utility model.

[0025] ELEMENT LABEL DESCRIPTION

[0026] 1. Base body, 11. Mounting part, 12. First mounting member, 13. Avoiding part, 2. Support member, 21. Rotating part, 22. First rotating shaft, 23. Third mounting member, 3. Driving assembly, 31. Transmission member, 311. Second rotating shaft, 32. Driving member, 4. Second mounting member, 5. Through-type jack, 6. Tool anchor, 7. Front card jack. DETAILED DESCRIPTION

[0027] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] Please refer to all the following drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change in the technical content.

[0029] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0030] See also Figures 1-5 The utility model provides an adaptive anchor removal base, which includes a base body 1, a support member 2, and a drive assembly 3; the base body 1 is a hollow truncated cone structure, and the support member 2 and the drive assembly 3 are arranged on the large end of the base body 1; the large end of the base body 1 is connected to a preset support surface through the support member 2, and its small end is used to connect with a through-type jack 5; the support member 2 is rotatably connected to the base body 1; the drive assembly 3 includes a transmission member 31, the transmission member 31 is rotatably connected to the support member 2, and the angle formed by the central axis of the transmission member 31 and the center line of the base body 1 is an acute angle. The base body 1 is a hollow truncated cone structure, that is, a hole penetrating the large end and the small end is arranged in the base body 1. When in use, the anchor removal base uses the hole to pass through the preset steel strand, so as to be sleeved on the steel strand, and the large end is connected to the preset support surface. It can be understood that the preset support surface can be a support surface on a concrete or other component with a prestressed steel strand arranged thereon, and this embodiment does not limit this.

[0031] Please refer to Figure 3 , for the convenience of description, Figure 3 the first mounting member 12 is omitted on the left side of Figure 3 . An installation portion 11 is provided on the base body 1, and the installation portion 11 is an arc-shaped structure; a rotation portion 21 is provided on the support member 2, and the rotation portion 21 is an arc-shaped structure adapted to the installation portion 11. Specifically, in this embodiment, the arc-shaped structure is provided on the inner side of the large end of the base body 1. Correspondingly, the rotation portion 21 is also provided on the support member 2 on the side close to the large end of the base body 1. When in use, when the transmission member 31 of the drive assembly 3 drives the support member 2 to rotate, the support member 2 rotates with the rotation portion 21 as the fulcrum, that is, with the installation portion 11 as the fulcrum. After the base body 1 is supported on the preset support surface, since both the installation portion 11 and the rotation portion 21 are arc-shaped structures, the arc-shaped outer side surface of the rotation portion 21 and the arc-shaped inner side surface of the installation portion 11 always remain in contact. As the first force-bearing structure, the connection between the transmission member 31 and the support member 2 is used as the second force-bearing structure. The two act together to enable the support member 2 to always remain in contact with the preset support surface, ensuring that the anchor withdrawal base remains in a predetermined position and guaranteeing the stability of the operation of the anchor withdrawal device. It can be understood that when not in use, since the transmission member 31 and the support member 2 always remain connected, the relative position between the support member 2 and the base body 1 will not change.

[0032] In an embodiment, a first mounting member 12 is provided on the base body 1; a first rotating shaft 22 is provided on the rotation portion 21 of the support member 2, and the rotation portion 21 of the support member 2 is rotatably connected to the first mounting member 12 through the first rotating shaft 22. Specifically, the first mounting member 12 is provided corresponding to the rotation portion 21. When not in use, the first mounting member 12 and the transmission member 31 act together, that is, fixed at two points, to ensure that the relative position between the support member 2 and the base body 1 will not change. When in use, the first mounting member 12, the installation portion 11, and the transmission member 31 are stressed to ensure that the support member 2 can always remain in contact with the preset support surface.

[0033] The anchor withdrawing base further includes a second mounting member 4 which is arranged at the large end of the base body 1. The driving assembly 3 is arranged on the second mounting member 4. The transmission member 31 passes through the second mounting member 4 and is rotatably connected to the support member 2. The angle formed by the straight line perpendicular to the connection surface between the second mounting member 4 and the driving assembly 3 and the central axis of the base body 1 is an acute angle. A third mounting member 23 is arranged on the support member 2. The third mounting member 23 is arranged at one end of the support member 2 close to the base body 1. An avoidance portion 13 is arranged on the base body 1. The transmission member 31 passes through the avoidance portion 13 and is rotatably connected to the third mounting member 23. There are two third mounting members 23. Waist-shaped holes are arranged on the third mounting member 23. The driving assembly 3 further includes a second rotating shaft 311 arranged on the transmission member 31. The transmission member 31 is rotatably connected to the third mounting member 23 through the second rotating shaft 311. One end of the second rotating shaft 311 is arranged in the waist-shaped hole of one third mounting member 23, and the other end is arranged in the waist-shaped hole of the other third mounting member 23. The driving assembly 3 includes a driving member 32 which is used for driving the transmission member 31 to move linearly. The driving member 32 is a linear motor or a cylinder, preferably a cylinder. The transmission member can be a lead screw or a transmission shaft coaxially arranged with the driving shaft of the driving member 32. Of course, it can also be other structures, and the present embodiment does not limit this.

[0034] Specifically, a flange is arranged at the large end of the base body 1. The second mounting member 4 is arranged on the side surface of the flange facing the small end. The support member 2 is arranged on the side surface of the flange away from the base body 1. The connection surface between the second mounting member 4 and the driving assembly 3 and the connection surface between the second mounting member 4 and the base are not perpendicular, that is, the angle formed by the straight line perpendicular to the connection surface between the second mounting member 4 and the driving assembly 3 and the central axis of the base body 1 is an acute angle. An avoidance portion 13 is arranged on the flange. The avoidance portion 13 is a notch to facilitate the connection between the transmission member 31 and the third mounting member 23. There are two third mounting members 23 which are arranged oppositely, and the transmission member 31 is located between them. When the driving member 32 drives the transmission member 31 to move linearly, the second rotating shaft 311 slides in the waist-shaped hole to drive the support member 2 to rotate. Optionally, bearings are arranged on the second rotating shaft 311. The second rotating shaft 311 slides in the waist-shaped hole through the bearings. The arrangement of the bearings reduces the friction between the second rotating shaft 311 and the inner side wall of the waist-shaped hole and facilitates the sliding of the transmission member 31 in the waist-shaped hole. The avoidance portion 13 is a notch arranged on the flange.

[0035] A fixing member 24 is further arranged on the support member 2. The fixing member 24 is used for fixing the support member 2 on a preset support surface. The fixing member 24 can be a ground nail or a bolt arranged on the side surface of the support member 2 away from the small end of the base body 1. In one embodiment, both the ground nail and the bolt are arranged on the support member 2. During use, the ground nail and / or the bolt penetrate into the preset support surface to fix the anchor withdrawing base on the preset support surface.

[0036] In this embodiment, the anchor retraction base includes two working holes, which are symmetrically arranged on the side surface of the anchor retraction base and penetrate through the side wall of the anchor retraction base; as Figures 1-2 described, the working holes divide the flange of the anchor retraction base into two parts. Correspondingly, there are also two support members 2, which are respectively arranged corresponding to the flange of one of the parts. There are 4 first mounting members 12, which are respectively arranged on the side walls of the working holes and are arranged corresponding to the mounting portions 11, that is, one first mounting member 12 is respectively arranged at the position of the side surface of the working hole corresponding to the mounting portion 11. More specifically, there are also two driving assemblies 3. During use, the two support members 2 can be driven by their respective driving assemblies 3 to adjust their tilting angles. In other embodiments, the support members 2 can also be arranged in multiple numbers, and correspondingly, the driving assemblies 3 are also arranged in multiple numbers. The driving assemblies 3 and the support members 2 are arranged in one-to-one correspondence. This embodiment does not limit this.

[0037] Please refer to Figure 6 , the present invention also provides an anchor retraction device for double-top anchor retraction, which includes the above-mentioned adaptive anchor retraction base, and also includes a hole-through jack 5, a tool anchor 6 and a front-caliper jack 7; the hole-through jack 5 is sleeved on the prestressed steel strand, one end of which is connected to the small end of the anchor retraction base, and the other end is connected to the tool anchor 6; the tool anchor 6 is arranged on the prestressed steel strand; the front-caliper jack 7 is arranged on the prestressed steel strand, and one end of it is connected to the end of the tool anchor 6 away from the hole-through jack 5.

[0038] Specifically, during use, first install the anchor retraction base, and then install the hole-through jack 5. The hole-through jack 5 extends a certain distance in advance, for example, 18 cm. Then install the tool anchor 6 and the front-caliper jack 7 on the prestressed steel strand. Then, tension the prestressed steel strand for anchor retraction through the front-caliper jack 7. When the working wedges of the working anchor are easy to remove, stop tensioning the prestressed steel strand, take out the working wedges, return the oil and jack back the hole-through jack, so that the cylinder of the hole-through jack retracts a certain distance (for example, 17 cm), and then reinstall the working wedges to re-anchor the prestressed steel strand on the working anchor. Then, retract the cylinder of the hole-through jack by a certain distance (for example, 1 cm) until the prestressed steel strand is only anchored to the working anchor by the working wedges. Then, remove the tension force of the prestressed steel strand by the front-caliper jack 7, that is, complete the first unloading of the prestressed steel strand; until all the prestressed steel strands are unloaded, this device can be removed.

[0039] In summary, the present utility model provides an anchor withdrawal base and an anchor withdrawal device for double-top anchor withdrawal of prestressed steel strands. By providing a support member 2 and a driving assembly 3, the support member 2 is rotatably connected to the base body 1; the driving assembly 3 includes a transmission member 31, the transmission member 31 is rotatably connected to the support member 2, and the included angle formed by the central axis of the transmission member 31 and the center line of the base body 1 is an acute angle. When facing a certain inclination angle of the preset support surface, the driving assembly 3 can be used to drive the transmission member 31 to move, and the transmission member 31 drives the support member 2 to rotate, so that the large end of the support member 2 and the base body 1 are inclined, so that the inclination angle of the support member matches the inclination angle of the preset support surface, and further the support member can be closely attached to the inclined preset support surface, so as to facilitate the installation of the anchor withdrawal base on the inclined preset support surface. Therefore, the anchor withdrawal base provided by the present utility model can adapt to preset support surfaces with different inclination angles after processing, and can be reused multiple times after processing and forming, reducing the construction cost and ensuring the construction progress. Therefore, the present utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0040] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An adaptive anchor removal base, characterized in that: The anchor removal base comprises: a base body, a support member, and a driving assembly; The base body is a hollow truncated cone structure, and the support member and the drive assembly are arranged on the large end of the base body; the large end of the base body is connected to the preset support surface through the support member, and the small end is used to connect to the through-type jack; The support member is rotatably connected to the base body; The driving assembly includes a transmission member, the transmission member is rotatably connected to the support member, and the angle formed by the central axis of the transmission member and the center line of the base body is an acute angle.

2. The adaptive anchor removal base according to claim 1, characterized in that: The base body is provided with a mounting portion, and the mounting portion is an arc-shaped structure; The support member is provided with a rotating portion, and the rotating portion is an arc-shaped structure matched with the mounting portion.

3. The adaptive anchor removal base according to claim 2, characterized in that: The base body is provided with a first mounting member; the rotating portion of the support member is provided with a first rotating shaft, and the rotating portion of the support member is rotatably connected to the first mounting member via the first rotating shaft.

4. The adaptive anchor removal base according to claim 2 or 3, characterized in that: The anchor removal base also includes a second mounting piece, which is arranged at the large end of the base body, and the driving assembly is arranged on the second mounting piece. The transmission member passes through the second mounting piece and is rotatably connected to the support member; the angle formed by the straight line perpendicular to the connection surface between the second mounting piece and the driving assembly and the center line of the base body is an acute angle.

5. The adaptive anchor removal base according to claim 4, characterized in that: The support member is provided with a third mounting member, and the third mounting member is arranged at one end of the support member close to the base body. The base body is provided with an avoidance portion, and the transmission member passes through the avoidance portion and is rotatably connected to the third mounting member.

6. The adaptive anchor-removing base according to claim 5, characterized in that: There are two third mounting members; each of the third mounting members is provided with a waist-shaped hole; The driving assembly also includes a second rotating shaft arranged on the transmission member, and the transmission member is rotatably connected to the third mounting member via the second rotating shaft; one end of the second rotating shaft is arranged in a waist-shaped hole of one of the third mounting members, and the other end is arranged in a waist-shaped hole of another of the third mounting members.

7. The adaptive anchor-removing base according to claim 6, characterized in that: The driving assembly includes a driving member, and the driving member is used to drive the transmission member to move linearly; The driving member is a linear motor or a cylinder.

8. The adaptive anchor-removing base according to claim 1, characterized in that: The support member is also provided with a fixing member, and the fixing member is used to fix the support member on the preset support surface.

9. The adaptive anchor-removing base according to claim 8, characterized in that: The fixing member is a ground nail and / or a bolt arranged on the side surface of the supporting member away from the small end of the base body.

10. An anchor unwinding device for double top anchor unwinding, characterized in that: It comprises an adaptive anchor-removing base as claimed in any one of claims 1 to 9, and also comprises a through-type jack, a tool anchor and a front-clip jack; The through-type jack is sleeved on the prestressed steel strand, one end of which is connected to the small end of the anchor withdrawal base, and the other end is connected to the tool anchor; The tool anchor is arranged on the prestressed steel strand; the front cardan-type jack is arranged on the prestressed steel strand, and one end of the front cardan-type jack is connected to the end of the tool anchor away from the through-type jack.

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