Anchor cable locking device and pre-stressed anchor cable tensioning and locking system

Abstract

The utility model relates to the field of anchor cable construction, and discloses an anchor cable locking device and a pre-stressed anchor cable tensioning and locking system.The anchor cable locking device is composed of a support, a clamping piece push plate and a lead screw assembly, and the clamping piece push plate and the lead screw assembly are arranged in the support; the support is composed of a base, connecting ribs and a supporting ring, the supporting ring and the base are coaxially arranged and connected through the connecting ribs, and a step hole arranged on the anchorage device in a sleeving mode is formed in the bottom of the base. The clamping piece push plate is arranged on the anchor cable in a sleeving mode and used for pushing the clamping piece into the anchorage device after the anchor cable is tensioned. The lead screw assembly comprises a sleeve, a hollow lead screw and a handle, the sleeve is detachably installed on the inner ring of the supporting ring, one end of the hollow lead screw is in threaded connection with the inner ring of the sleeve, the other end of the hollow lead screw is used for pushing the clamping piece push plate, and the handle is detachably arranged on the side wall of the hollow lead screw. The pre-stress of the anchor cable is kept consistent before and after locking, and the anchor cable pre-stress locking device has the advantages of being simple in structure, easy to operate, convenient to use and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of anchor cable construction, and in particular to an anchor cable locking device and a prestressed anchor cable tensioning and locking system. Background Technology

[0002] Prestressed anchor cables are one of the most commonly used structures in bridges, building structures, and slope engineering. After the prestressing is applied, anchorages are needed to lock the anchor cables in place. A traditional prestressed anchor cable tensioning system is shown in the attached figure. Figure 4 As shown, the tensioning jack tensions the anchor cable, and the wedge moves towards the limiting plate under the action of the anchor cable. The amount of movement is limited by the limiting amount of the limiting plate. When the stress exceeds the design stress value by a certain range, the tensioning jack slowly releases the tension, and the wedge is brought into the conical hole of the anchor by the retracting anchor cable, thus locking the anchor cable. Traditional anchor cable locking methods not only have the problem of possible locking failure, but also the problem of significant loss of prestress in the anchor cable. The locking value is generally less than 80% of the maximum tension value. In order to reduce the problem of prestress loss, over-tensioning is required, which will damage the soil and rock layers of the anchorage section.

[0003] Chinese patent application CN202310805994.3, filed on July 3, 2023, discloses an adaptive locking device for anchor cables, which has the following defects:

[0004] 1. The structure is designed as a hydraulic cylinder, which is complex and requires high precision in the machining of each component, resulting in high manufacturing costs;

[0005] 2. It requires a hydraulic system to function, which requires an additional hydraulic device, further increasing manufacturing costs, carrying difficulties, and usage costs.

[0006] Based on this, this application provides an anchor cable locking device and a prestressed anchor cable tensioning and locking system that are simple in structure, easy and quick to operate, and low in manufacturing cost. Utility Model Content

[0007] This utility model aims to solve the technical problems existing in the prior art. Therefore, this utility model provides an anchor cable locking device and a prestressed anchor cable tensioning and locking system that are simple in structure, easy and quick to operate, and low in manufacturing cost.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] In a first aspect, an anchor cable locking device is provided, comprising a support, a clamp pusher plate, and a screw assembly, wherein the clamp pusher plate and the screw assembly are disposed within the support; the support comprises a base, connecting ribs, and a support ring, wherein the support ring and the base are coaxially arranged and connected by multiple connecting ribs, and the bottom of the base is provided with a stepped hole for fitting onto the anchor; the clamp pusher plate is fitted onto the anchor cable and is used to push the clamp into the anchor after the anchor cable is tensioned; the screw assembly includes a sleeve, a hollow screw, and a handle, wherein the sleeve is detachably installed on the inner ring of the support ring, one end of the hollow screw is threadedly connected to the inner ring of the sleeve, and the other end is used to push the clamp pusher plate, and the handle is detachably disposed on the side wall of the hollow screw.

[0010] In some alternative embodiments, the support is configured as an integrally formed structure, and there are 2 to 3 connecting ribs.

[0011] In some alternative embodiments, the longitudinal section of the clip pusher plate is T-shaped and has multiple through holes for the anchor cable to pass through.

[0012] In some alternative embodiments, the lead screw assembly further includes a top tube, the inner ring of which is screwed to the end of the hollow lead screw away from the sleeve.

[0013] In some alternative embodiments, the hollow lead screw is a hollow lead screw with both positive and negative threads.

[0014] In some alternative embodiments, the hollow lead screw has a plurality of sockets arranged in a ring at its center, and the handle is plugged into the sockets.

[0015] In some alternative embodiments, the top of the sleeve is provided with a limiting flange, which is pressed against the support by a tension jack.

[0016] Secondly, a prestressed anchor cable tensioning and locking system is provided, comprising a pad, a working anchor assembly, an anchor cable locking device as described in any of the above embodiments, a tensioning jack, and a tool anchor assembly arranged in sequence. After the anchor cable tensioning is completed, the anchor cable locking device pushes the clamp of the working anchor assembly into the working anchor to lock the anchor cable.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. After the anchor cable is tensioned, this utility model can push the clamping plate into the anchor by rotating the hollow screw through the handle, so as to ensure that the anchor cable can be locked by the working anchor. After locking, the tensioning jack is unloaded, thereby achieving the same prestress of the anchor cable before and after locking. The anchor cable locking device has a simple structure and low requirements for the processing accuracy of each component, so the manufacturing cost is low. At the same time, it does not require the configuration of a hydraulic system, and has the advantages of simple operation and convenient use.

[0019] 2. The design includes a jacking pipe and uses a hollow screw for adjustment, which reduces the rotation angle of the hollow screw at the same pushing distance, thus improving the operability and convenience of the device.

[0020] 3. The sleeve is pressed onto the support by a tensioning jack, which facilitates the quick installation and disassembly of the device and improves work efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a three-dimensional structural diagram of the anchor cable locking device provided by this utility model;

[0023] Figure 2 This is a cross-sectional view of the anchor cable locking device provided by this utility model;

[0024] Figure 3 This is a structural schematic diagram of the prestressed anchor cable tensioning and locking system provided by this utility model;

[0025] Figure 4 This is a schematic diagram of a traditional prestressed anchor cable tensioning system.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1—Support, 1.1—Base, 1.1.1—Step hole, 1.2—Connecting rib, 1.3—Support ring, 2—Clamping plate push plate, 3—Screw assembly, 3.1—Sleeve, 3.1.1—Limiting flange, 3.2—Hollow screw, 3.2.1—Insertion hole, 3.3—Handle, 3.4—Jack pipe, 4—Plate, 5—Working anchor assembly, 5.1—Anchor, 5.2—Clamping plate, 6—Tensioning jack, 7—Tool anchor assembly, 8—Anchor cable. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Example 1

[0033] Please see the appendix Figure 1 and attached Figure 2 This embodiment provides an anchor cable locking device, which consists of a support 1, a clamping push plate 2, and a screw assembly 3. The clamping push plate 2 and the screw assembly 3 are disposed within the support 1, wherein:

[0034] The support 1 consists of a base 1.1, connecting ribs 1.2, and a support ring 1.3. The support ring 1.3 is coaxially arranged with the base 1.1, and the two are connected by multiple connecting ribs 1.3. In this embodiment, the support 1 is preferably designed as an integrally formed structure, wherein there are 2 to 3 connecting ribs 1.2, and in this embodiment, 2 are preferably provided. The bottom of the base 1.1 is provided with a stepped hole 1.1.1 for fitting onto the anchor 5.1, so that it can be directly fitted onto the anchor during installation.

[0035] The wedge pusher plate 2 is fitted onto the anchor cable and is used to push the wedge 5.2 into the anchor 5.1 after the anchor cable 8 is tensioned. Preferably, the longitudinal section of the wedge pusher plate 2 is "T" shaped and has multiple through holes for the anchor cable to pass through, generally each through hole corresponds to one anchor cable.

[0036] The lead screw assembly 3 includes a sleeve 3.1, a hollow lead screw 3.2, and a handle 3.3. The sleeve 3.1 is detachably installed on the inner ring of the support ring 1.3. In this embodiment, the detachable installation method of the sleeve is preferably as follows: the top of the sleeve 3.1 is provided with a limiting flange 3.1.1, and its bottom is inserted into the support ring 1.3 and limited by the limiting flange, that is, the sleeve and the support ring are plugged in. One end of the hollow lead screw 3.2 is threadedly connected to the inner ring of the sleeve 3.1, and the other end is used to push the clamping plate 2. The handle 3.3 is detachably provided on the side wall of the hollow lead screw 3.2 and is used to rotate the hollow lead screw. In this embodiment, the detachable installation method of the handle is preferably as follows: the middle part of the hollow lead screw 3.2 has a ring array of multiple insertion holes 3.2.1, and the handle 3.3 is plugged in to the insertion holes 3.2.1.

[0037] In practical implementation, the anchor cable locking device is applied to the prestressed anchor cable tensioning system to form a prestressed anchor cable tensioning locking system, as shown in the attached figure. Figure 3 As shown, the system includes a pad 4, a working anchor assembly 5, an anchor cable locking device, a tensioning jack 6, and a tool anchor assembly 7 arranged in sequence. The specific operation is as follows:

[0038] S1. Fit the bottom of the support 1 onto the anchor 5.1 of the working anchor assembly 5;

[0039] S2. Pass each anchor cable 8 through the wedge pusher plate 2 and move the wedge pusher plate 2 into the support 1;

[0040] S3. Assemble the hollow screw 3.2 and the sleeve 3.1, and then insert the hollow screw 3.2 downwards into the support 1;

[0041] S4. Install tension jack 6 and use the tension jack to press the sleeve 3.1 tightly onto the support 1;

[0042] S5, Install tool anchor assembly 7;

[0043] S6. Before tensioning, insert the handle 3.3 into the insertion hole 3.2.1 of the hollow screw 3.2, and adjust the hollow screw 3.2 so that there is a certain gap between the hollow screw 3.2 and the clamping push plate 2.

[0044] S7. Implement prestressing tensioning of the anchor cable. When the prestress of the anchor cable 8 reaches the set value, rotate the hollow screw 3.2 through the handle 3.3 to drive the wedge push plate 2 to move towards the anchor 5.1 until the wedge 5.2 is pushed into the anchor 5.1, thereby achieving passive locking of the anchor cable by external force, ensuring successful locking, and keeping the prestress of the anchor cable consistent before and after locking.

[0045] S8. Unload tension jack 6;

[0046] S9. When further compensation tensioning is required, rotate the hollow screw rod in the direction that moves it away from the anchor. At this time, the wedges will self-lock under prestress. Load the tensioning jack to perform compensation tensioning.

[0047] S10. After the compensation tensioning is completed, lock the anchor cable and repeat S7 and S8.

[0048] Example 2

[0049] Based on Embodiment 1, this embodiment further optimizes the design of the lead screw assembly, as shown in the attached figure. Figure 1 and attached Figure 2 As shown, in this embodiment, a top tube 3.4 is also designed on the lead screw assembly 3. The inner ring of the top tube 3.4 is screwed to the end of the hollow lead screw 3.2 away from the sleeve 3.1. Preferably, the hollow lead screw 3.2 is a hollow lead screw with both positive and negative threads.

[0050] This embodiment utilizes a hollow screw with both positive and negative threads and a jacking tube to push the clamping plate. This reduces the rotation angle of the hollow screw while maintaining the same pushing distance, improving the operability and convenience of the device. Furthermore, when adjusting the jacking tube to press the clamping plate, compared to directly using the hollow screw to press it, which requires overcoming the rotational friction between the hollow screw and the clamping plate, this design allows the hollow screw to continue providing pressing force after the jacking tube contacts the clamping plate, eliminating the need to overcome significant rotational friction and making adjustment more effortless.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An anchor line locking device, characterized by: The anchor cable locking device comprises a support, a clamping plate pusher and a screw rod assembly, wherein the clamping plate pusher and the screw rod assembly are arranged in the support; The support comprises a base, connecting ribs and a supporting ring, wherein the supporting ring is coaxially arranged with the base and connected with the base by the connecting ribs, and the base is provided with a stepped hole sleeved on the anchorage device at the bottom; The clamping plate pusher is sleeved on the anchor cable and used to push the clamping plate into the anchorage device after the anchor cable is tensioned; The screw rod assembly comprises a sleeve, a hollow screw rod and a handle, wherein the sleeve is detachably arranged in the inner ring of the supporting ring, one end of the hollow screw rod is threadedly connected with the inner ring of the sleeve, and the other end is used to push the clamping plate pusher, and the handle is detachably arranged on the side wall of the hollow screw rod.

2. An anchor line locking device according to claim 1, characterized in that: The support is provided as an integral molding structure, and the connecting ribs are provided with 2-3 connecting ribs.

3. An anchor line locking device according to claim 1, characterized in that: The longitudinal section of the clamping plate pusher is in "T" shape, and a plurality of through holes for the anchor cable are arranged on the clamping plate pusher.

4. An anchor line locking device according to claim 1, characterized in that: The screw rod assembly further comprises a top pipe, and the inner ring of the top pipe is threadedly connected with the end of the hollow screw rod away from the sleeve.

5. An anchor line locking device according to claim 4, characterised in that: The hollow screw rod is a positive and reverse tooth hollow screw rod.

6. An anchor line locking device according to claim 5, characterised in that: The middle part of the hollow screw rod is provided with a plurality of insertion holes, and the handle is connected with the insertion holes by insertion.

7. An anchor line locking device according to claim 1, characterized in that: The top of the sleeve is provided with a limiting flange, which is pressed on the support by the tensioning jack.

8. A pre-stressed tendon tensioning and locking system, characterized by: The anchor cable locking device comprises a support, a clamping plate pusher and a screw rod assembly, wherein the clamping plate pusher and the screw rod assembly are arranged in the support;

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