Anchor withdrawing base with centering mechanism and anchor withdrawing device

Abstract

The utility model provides an anchor withdrawing base with a centering mechanism and an anchor withdrawing device, which are used for solving the problem that an anchor withdrawing base in the prior art is not provided with a centering mechanism to ensure that the center line of the anchor withdrawing base is overlapped with the center line of a working anchor. The base comprises a base body and a centering mechanism, the base body is of a hollow circular-truncated-cone-shaped structure, and a working hole is formed in the side face of the base body. The centering mechanism is detachably arranged on the base body, one end of the centering mechanism penetrates through the working hole to be connected with the working anchor, and the centering mechanism is used for enabling the center line of the base body to coincide with the central axis of the working anchor, is clamped on the working anchor through the centering mechanism and is mounted on the base body; therefore, an operator can conveniently coincide the center line of the base body with the center line of the working anchor during installation, and the situation that when the anchor withdrawing device is used, the prestressed steel strand deviates towards one side, and the anchor withdrawing operation on the prestressed steel strand is affected is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of prestressed steel strand anchor withdrawal, and particularly relates to an anchor withdrawal base and an anchor withdrawal device with a centering mechanism. Background Art

[0002] The 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 applicable to prestressed concrete and similar uses. There is also a prestressed steel strand double-top anchor withdrawal device in the prior art, which includes an anchor withdrawal base, a through-hole jack, a working anchor and a front clamping jack. A working hole is usually arranged on the side of the anchor withdrawal base. Through the cooperation of the four, the operator passes through the working hole to replace the working clamping piece of the working anchor to achieve anchor withdrawal.

[0003] In this way, it is necessary to sleeved the anchor withdrawal base on the working anchor, and one end of the anchor withdrawal base abuts against the preset support surface, and the other end is connected to the through-hole jack. Moreover, it is necessary to ensure that the center line of the anchor withdrawal base coincides with the central axis of the working anchor, so as to ensure that when installing subsequently, the center line of the through-hole jack and the central axis of the working anchor also coincide, and to avoid the prestressed steel strand contacting the inner side surfaces of the anchor withdrawal base and the through-hole jack when the anchor withdrawal device is in use, resulting in uneven circumferential force on the prestressed steel strand, causing the prestressed steel strand to deviate to one side, which affects the anchor withdrawal operation of the prestressed steel strand. However, there is no corresponding centering mechanism in the existing anchor withdrawal base to ensure that the center line of the anchor withdrawal base coincides with the central axis of the working anchor. Instead, it is ensured that its center line coincides with the central axis of the tool anchor by the operator's naked-eye observation; this method is limited by the operator's experience and can only be achieved through multiple adjustments, which is cumbersome in operation and not conducive to improving work efficiency. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an anchor withdrawal base and an anchor withdrawal device with a centering mechanism, which are used to solve the problem that there is no centering mechanism in the existing anchor withdrawal base to ensure that the center line of the anchor withdrawal base coincides with the center line of the working anchor.

[0005] To achieve the above purpose and other related purposes, the present utility model provides an anchor withdrawal base with a centering mechanism, which includes: a base body and a centering mechanism; the base body is a hollow frustum-shaped structure, and a working hole is arranged on the side surface of the base body; the centering mechanism is detachably arranged on the base body, and one end of it passes through the working hole and is connected to the working anchor, and is used to make the center line of the base body coincide with the central axis of the working anchor.

[0006] Optionally, the anchor withdrawal base further includes a flange, one end of the flange is used to be connected to the preset support surface, and the other end is connected to the base body; the centering mechanism is detachably connected to the flange, and one end of it passes through the working hole and is connected to the working anchor.

[0007] Optionally, mounting members for mounting the centering mechanism are provided on the flange. The mounting members are a plurality of mounting posts provided at one end of the flange away from the preset support surface. A plurality of mounting holes connected to the mounting posts are provided on the centering mechanism, and the mounting holes and the mounting posts are arranged in one-to-one correspondence.

[0008] Optionally, the centering mechanism includes a driving component, two clamping components and a housing. The driving component and the clamping components are provided on the housing. The driving component is connected to the two clamping components, and the driving component is used to drive the two clamping components to move towards each other or away from each other.

[0009] Optionally, the driving component includes a first driving member, two first rotating shafts and two second driving members. The two first rotating shafts are provided on the housing. The two second driving members are respectively rotatably connected to one of the first rotating shafts. The two second driving members are respectively rotatably connected to one of the clamping components. The first driving member is rotatably connected to the two second driving members and is used to drive the two second driving members to rotate around the first rotating shaft.

[0010] Optionally, the driving component further includes two second rotating shafts, two third rotating shafts and two connecting members. The two second rotating shafts are provided on the first driving member, and the two third rotating shafts are respectively provided on one of the second driving members. One end of the two connecting members is connected to one of the second rotating shafts, and the other end is connected to one of the third rotating shafts.

[0011] Optionally, a guiding member is further provided on the housing, and the two clamping components are provided on the guiding member. The second driving member is used to drive the two clamping components to move along the guiding member.

[0012] Optionally, the clamping component includes a first clamping member and a second clamping member, and the first clamping member and the second clamping member are detachably connected. The first clamping member is provided on the guiding member, and the first clamping member is connected to the second driving member.

[0013] Optionally, a clamping portion is provided on the first clamping member and / or the second clamping member, and the clamping portion is provided on the opposite side surfaces of the two clamping members.

[0014] The present utility model further provides an anchor withdrawing device, which includes an anchor withdrawing base having a centering mechanism as described above, and further includes a through-hole jack, a tool anchor and a front clamping jack. The through-hole jack is sleeved on the prestressed steel strand, one end of which is connected to 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 through-hole jack.

[0015] As described above, the anchor unloading base and anchor unloading device of the utility model have at least the following beneficial effects: through the centering mechanism clamped on the working anchor and installed on the base body, the operator can make the center line of the base body coincide with the center line of the working anchor during installation, so as to avoid the prestressed steel strand deviating to one side when the anchor unloading device is in use, thereby affecting the anchor unloading operation of the prestressed steel strand. After use, the centering mechanism can also be disassembled from the anchor unloading base, so that the operator can disassemble and reinstall the working clip of the tool anchor through the working hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic structural diagram of the anchor withdrawal base of the utility model.

[0017] Figure 2 Shown is a structural schematic diagram of the centering mechanism of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the centering mechanism of the present invention with part of the housing omitted.

[0019] Figure 4 Shown is a structural schematic diagram of the anchor withdrawal device of the present utility model.

[0020] Component number description

[0021] 1. Base body, 2. Centering mechanism, 21. Mounting hole, 22. Driving assembly, 221. First driving member, 222. First rotating shaft, 223. Second driving member, 224. Second rotating shaft, 225. Third rotating shaft, 226. Connecting member, 23. Clamping assembly, 231. First clamping member, 232. Second clamping member, 24. Shell, 241. Guide member, 3. Working hole, 4. Flange, 41. Mounting column, 5. Through-type jack, 6. Tool anchor, 7. Front card jack. DETAILED DESCRIPTION

[0022] 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.

[0023] Please refer to all the following attached drawings. It should be noted that the structures, scales, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the implementable scope of the present utility model.

[0024] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0025] Please refer to Figure 1 , the present utility model provides an anchor withdrawing base with a centering mechanism, which includes a base body 1 and a centering mechanism 2; the base body 1 is a hollow frustum-shaped structure, and a working hole 3 is provided on the side surface of the base body 1; the centering mechanism 2 is detachably arranged on the base body 1, and one end thereof passes through the working hole 3 to be connected to the working anchor, so as to coincide the center line of the base body 1 with the central axis of the working anchor. During use, the centering mechanism 2 can be used to set the base body 1 on a preset support surface, and the center line of the base body 1 coincides with the central axis of the working anchor; after the installation of the base body 1 is completed, the centering mechanism 2 is detached from the base body 1 to avoid affecting the operation of disassembling or reinstalling the working clamp of the tool anchor 6 due to the centering mechanism 2 being arranged in the working hole 3 and connected to the working anchor.

[0026] The anchor withdrawing base further includes a flange 4, one end of the flange 4 is connected to the preset support surface, and the other end is connected to the base body 1; the centering mechanism 2 is detachably connected to the flange 4, and one end thereof passes through the working hole 3 to be connected to the working anchor. In one embodiment, the flange 4 is integrally formed with the base body 1 and protrudes from the base body 1. The flange 4 is hollow, which is convenient for sleeving the anchor withdrawing base onto the tool anchor 6. In other embodiments, the flange 4 is installed on the base body 1 through an installation structure, such as threading, bolts, welding, etc., and this embodiment does not limit this. It can be understood that the preset support surface can be the support surface on the concrete provided with prestressed steel strands or other components with prestressed steel strands, and this embodiment does not limit this.

[0027] Please refer to Figures 1-3, an installation member for installing the centering mechanism 2 is provided on the flange 4. The installation member is a plurality of installation posts 41 provided at one end of the flange 4 away from the preset support surface. Correspondingly, a plurality of installation holes 21 connected to the installation posts 41 are provided on the centering mechanism 2, and the installation holes 21 and the installation posts 41 are arranged in one-to-one correspondence. The installation posts 41 can be three, and the three installation posts 41 form a triangular structure to ensure that the relative position of the centering mechanism 2 does not change each time it is installed on the flange 4. The installation holes 21 can be through holes, and the installation posts 41 are cylindrical structures provided with a threaded structure. After the centering mechanism 2 is installed on the flange 4, a structure such as a nut is used to fix the centering mechanism 2 on the flange 4 to ensure that the relative position of the centering mechanism 2 and the flange 4 does not change during use.

[0028] The centering mechanism 2 includes a driving component 22, two clamping components 23, and a housing 24; the driving component 22 and the two clamping components 23 are arranged in the housing 24, the driving component 22 is connected to the two clamping components 23, and the driving component 22 is used to drive the two clamping components 23 to move towards each other or away from each other. The inner shell of the housing 24 is provided with a receiving cavity for accommodating the driving component 22 and the two clamping components 23. It can also be that the housing 24 is composed of two sub-housings 24. After the two sub-housings 24 are installed together, a receiving cavity for accommodating the driving component 22 and the two clamping components 23 is formed. It can be understood that when the driving component 22 and the two clamping components 23 are installed in the receiving cavity, the driving component 22 and the clamping components 23 extend out of the housing 24 away from their connection ends respectively, so as to facilitate the operator to perform a driving operation on the driving component 22 or the clamping component 23 to clamp the working anchor. When the clamping components 23 move relative to each other, the two clamping components 23 are respectively in contact with the side surface of the working anchor to clamp the working anchor; when the clamping components 23 move away from each other, the two clamping components 23 are respectively separated from the side surface of the working anchor to release the working anchor.

[0029] The driving component 22 includes a first driving member 221, two first rotating shafts 222, and two second driving members 223; the two first rotating shafts 222 are arranged on the housing 24; the two second driving members 223 are respectively rotatably connected to one of the first rotating shafts 222; the two second driving members 223 are respectively rotatably connected to one of the clamping components 23; the first driving member 221 is rotatably connected to the two second driving members 223 and is used to drive the two second driving members 223 to rotate around the first rotating shaft 222. The first rotating shaft 222, the second driving member 223, and the clamping component 23 are arranged in one-to-one correspondence. During use, the first driving member 221 is used to drive the second clamping member 232 to rotate around the first rotating shaft 222. And since the two second driving members 223 are respectively connected to one of the driving components 22, the first driving member 221 can drive the two driving components 22 to move towards each other or away from each other.

[0030] The driving assembly 22 further includes two second rotating shafts 224, two third rotating shafts 225 and two connecting members 226; the two second rotating shafts 224 are arranged on the first driving member 221, and the two third rotating shafts 225 are respectively arranged on one of the second driving members 223; one end of each of the two connecting members 226 is connected to one of the second rotating shafts 224, and the other end is connected to one of the third rotating shafts 225. One second rotating shaft 224, one third rotating shaft 225, one connecting member 226, one second driving member 223 and one clamping assembly 23 are arranged in one-to-one correspondence.

[0031] A guiding member 241 is further arranged on the housing 24, and the two clamping assemblies are arranged on the guiding member 241. The second driving member 223 is used to drive the two clamping assemblies 23 to move along the guiding member 241. The guiding member 241 can be a guide rail arranged in the accommodating cavity of the housing 24. Of course, it can also be other guiding structures, and the present embodiment does not limit this.

[0032] The clamping assembly 23 includes a first clamping member 231 and a second clamping member 232, and the first clamping member 231 and the second clamping member 232 are detachably connected; the first clamping member 231 is arranged on the guiding member 241, and the first clamping member 231 is connected to the second driving member 223. Specifically, a rotating shaft can be arranged on the first clamping member 231, a rotating hole is arranged on the second clamping member 232, and threads are arranged in the rotating shaft and the rotating hole. When the working anchor is in the groove on the preset support surface, since the first clamping member 231 is arranged parallel to the preset support surface, the first clamping member 231 cannot be connected to the side surface of the working anchor. Therefore, the second clamping member 232 is arranged, and the second clamping member 232 can be installed on the first clamping member 231 and arranged at a certain angle, so that the second clamping member 232 can extend into the groove to be connected to the working anchor, and the center line of the anchor-removing base is made to coincide with the central axis of the working anchor.

[0033] A clamping portion is arranged on the first clamping member 231 and / or the second clamping member 232, and the clamping portion is arranged on the opposite side surfaces of the two clamping members. The clamping portion can be a protrusion, a groove or other structures arranged on the opposite side surfaces of the two clamping members, and is used to increase the friction force between the clamping members and the side surface of the working anchor.

[0034] Working principle: The base body 1 is sleeved on the tool anchor 6, and then the centering mechanism 2 is installed on the base body 1 and fixed to the base body 1 by means of the mounting member. Then, the first driving member 221 is pushed into the housing 24 of the centering mechanism 2. The first driving member 221 drives the connecting member 226 to move into the housing 24. The movement of the connecting member 226 drives the second driving member 223 to rotate around the first rotating shaft 222. Since a tooth-shaped structure is provided at the connection between the second driving member 223 and the clamping assembly 23, and when the first driving member 221 moves into the housing 24, it simultaneously drives the two second driving members 223 to rotate around the third rotating shaft 225. Therefore, the two driving assemblies 22 move away from each other along the guide member 241. When the first driving member 221 is pulled out of the housing 24, the first driving member 221 drives the connecting member 226 to move out of the housing 24. The movement of the connecting member 226 drives the second driving member 223 to rotate around the third rotating shaft 225. The rotation of the second driving member 223 drives the two driving assemblies 22 to move towards each other, so as to clamp the driving assemblies 22 on the side of the working anchor, facilitating the coincidence of the center line of the base body 1 and the central axis of the working anchor.

[0035] Please refer to Figure 4 , the present utility model further provides an anchor withdrawing device, which includes the above-mentioned anchor withdrawing base with a centering mechanism, and further includes a hole-through jack 5, a tool anchor 6 and a front clamping jack 7; the hole-through jack is sleeved on the prestressed steel strand, one end of which is connected to the first body of the anchor withdrawing 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 clamping jack 7 is arranged on the prestressed steel strand, and one end of which is connected to the end of the tool anchor 6 far from the hole-through jack 5.

[0036] Specifically, during use, first install the anchor withdrawing 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 clamping jack 7 on the prestressed steel strand. Then, tension the prestressed steel strand of the anchor withdrawal by the front clamping jack 7. When the working wedges of the working anchor are easy to remove, stop tensioning the prestressed steel strand. The operator takes out the working wedges through the working hole 3, returns the oil and jacks back the hole-through jack, so that the oil cylinder of the hole-through jack retracts a certain distance (for example, 17 cm), and then reinstalls the working wedges, so that the prestressed steel strand is re-anchored to the working anchor. Then, retract the oil 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 of the prestressed steel strand by the front clamping 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.

[0037] In summary, in the present utility model, an alignment mechanism 2 is provided on the anchor withdrawal base. By clamping the alignment mechanism 2 on the working anchor and installing it on the base body 1, it is convenient for the operator to align the center line of the base body 1 with the center line of the working anchor during installation, avoiding the prestressed steel strand deviating to one side during the use of the anchor withdrawal device, which affects the anchor withdrawal operation of the prestressed steel strand. And after the use is completed, the alignment mechanism 2 can also be disassembled from the anchor withdrawal base, so that the operator can disassemble and reinstall the working clamping pieces of the tool anchor 6 through the working hole 3. Therefore, the present utility model effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0038] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended 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 completed 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 anchor removal base with a centering mechanism, characterized in that: The anchor removal base comprises: a base body and a centering mechanism; The base body is a hollow truncated cone structure, and a working hole is arranged on the side of the base body; The centering mechanism is detachably arranged on the base body, and one end of the centering mechanism passes through the working hole and is connected to the working anchor, so as to make the center line of the base body coincide with the center axis of the working anchor.

2. The anchor undocking base with a centering mechanism according to claim 1, characterized in that: The anchor removal base also includes a flange, one end of which is used to be connected to a preset support surface, and the other end of which is connected to the base body; The centering mechanism is detachably connected to the flange, and one end thereof passes through the working hole and is connected to the working anchor.

3. The anchor removal base with a centering mechanism according to claim 2, characterized in that: The flange is provided with a mounting member for mounting the centering mechanism, and the mounting member is a plurality of mounting columns arranged at one end of the flange away from the preset support surface; The centering mechanism is provided with a plurality of mounting holes connected with the mounting posts, and the mounting holes are arranged in a one-to-one correspondence with the mounting posts.

4. The anchor undocking base with a centering mechanism according to claim 1, characterized in that: The centering mechanism comprises a driving assembly, two clamping assemblies and a housing; The driving assembly and the clamping assembly are arranged on the housing; The driving assembly is connected to the two clamping assemblies, and the driving assembly is used to drive the two clamping assemblies to move toward or away from each other.

5. The anchor removal base with a centering mechanism according to claim 4, characterized in that: The driving assembly comprises a first driving member, two first rotating shafts and two second driving members; The two first rotating shafts are arranged on the housing; The two second driving members are respectively rotatably connected to one of the first rotating shafts; the two second driving members are respectively rotatably connected to one of the clamping assemblies; The first driving member is rotatably connected to the two second driving members, and is used to drive the two second driving members to rotate around the first rotating shaft.

6. The anchor removal base with a centering mechanism according to claim 5, characterized in that: The driving assembly further includes two second rotating shafts, two third rotating shafts and two connecting members; The two second rotating shafts are arranged on the first driving member, and the two third rotating shafts are respectively arranged on one of the second driving members; one end of the two connecting members is connected to one of the second rotating shafts, and the other end is connected to one of the third rotating shafts.

7. The anchor removal base with a centering mechanism according to claim 6, characterized in that: The housing is also provided with a guide member, and the two clamping assemblies are provided on the guide member; The second driving member is used for driving the two clamping assemblies to move along the guide member.

8. The anchor removal base with a centering mechanism according to claim 7, characterized in that: The clamping assembly includes a first clamping member and a second clamping member, wherein the first clamping member is detachably connected to the second clamping member; the first clamping member is disposed on the guide member, and the first clamping member is connected to the second driving member.

9. The anchor removal base with a centering mechanism according to claim 8, characterized in that: The first clamping member and / or the second clamping member are provided with clamping portions, and the clamping portions are provided on opposite sides of the two clamping members.

10. An anchor unwinding device, characterized in that: It comprises the anchor-removing base with a centering mechanism 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 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.

Images