Prestressed cable tensioning equipment

Abstract

The utility model relates to the technical field of pre-stressed anchor cables, and particularly discloses pre-stressed cable tensioning equipment which comprises a foot support installed at the top end of a connector, the connector is provided with a plurality of cable penetrating holes, anchor heads of pre-stressed anchor cables penetrate through the cable penetrating holes to be located on the connector, a jack is installed on the foot support, and the foot support comprises supporting legs and a supporting table. The supporting legs are fixedly supported on the connectors, the supporting table is fixedly connected to the top ends of the supporting legs, tensioning holes corresponding to the cable penetrating holes are formed in the supporting table, an annular sliding way is arranged on the upper end face of the supporting table, and an arc-shaped sliding block is arranged at the bottom end of the jack and slidably connected into the annular sliding way. The jack can be directly pushed to slide on the supporting table, the tensioning rod can be installed to conduct tensioning operation when the jack slides to the center of the jack and corresponds to a tensioning hole of the pre-stressed anchor cable needing to be tensioned, manpower is saved, the tensioning operation efficiency is improved, the jack is not prone to rollover, and the situation that operators are injured by the jack is avoided; and the safety of operators is ensured.

Description

Technical Field

[0001] This utility model relates to the field of prestressed anchor cable technology, specifically to a prestressed cable tensioning device. Background Technology

[0002] Prestressed anchor cables are mainly used to reinforce slopes to improve the integrity and strength of unstable rock masses. They are fixed inside the rock mass using prestressing methods. Prestressed anchor cables need to be used in conjunction with specialized tensioning devices so that the tensioning devices can tension and fix the prestressed anchor cables.

[0003] The existing tensioning device includes a jack, support legs, tensioning rods, and tensioning nuts. The ends of the prestressed anchor cables are fixedly connected to connectors, and the anchor heads of the prestressed anchor cables pass through the connectors. The tensioning steps are as follows: before tensioning, install support legs on the upper surface of the connectors—install tensioning rods—install jacks—install tensioning nuts—install oil pumps and oil gauges—stage tensioning—read and calculate elongation values ​​to meet design requirements—hold load, unload load, and return the jacks—remove the tensioning device—tension the lower anchor cables. Therefore, after tensioning and anchoring one anchor cable, it is necessary to remove the tensioning nut, jack, and tensioning rod of the tensioning device and move it to the next anchor cable to be tensioned. Currently, the dismantled tensioning device is manually moved to be opposite the next anchor cable to be tensioned. Since the jack is made of high-strength and high-hardness materials, such as high-quality alloy steel, these materials have a high density, so the overall weight of the jack is heavy. Manual handling requires a lot of manpower and is inefficient. If the jack tip over during the handling process, it may injure the workers, and safety cannot be guaranteed. Utility Model Content

[0004] The purpose of this invention is to provide a prestressed cable tensioning device to solve the problems of manual handling and dismantling of tensioning devices, which are not only labor-intensive and inefficient, but also lack safety.

[0005] To address the above issues, the following technical solution is provided:

[0006] A prestressed cable tensioning device includes a foot support mounted on the top of a connector. The connector has several cable-passing holes. The anchor head of the prestressed anchor cable passes through the cable-passing holes and is positioned above the connector. A jack is mounted on the foot support. The foot support includes several support legs and a support platform. The support legs are evenly distributed and fixedly supported on the connector. The support platform is fixedly connected to the top of all the support legs. The support platform has several tensioning holes corresponding to the cable-passing holes. An annular slide rail is provided on the upper surface of the support platform. An arc-shaped slider is provided at the bottom of the jack and is slidably connected in the annular slide rail. A tensioning rod passing through the tensioning holes is inserted through the center of the jack. One end of the tensioning rod extends out of the jack and is locked by a tensioning nut. The other end of the tensioning rod is detachably connected to the anchor head of the anchor cable.

[0007] The basic principle of the above technical solution is as follows: After tensioning is completed, the tensioning nut is removed, the tensioning rod is removed, and the jack is pushed to slide on the support platform until the center of the jack is aligned with the next tensioning hole. Then, the tensioning rod is passed through the center of the jack so that the tensioning rod is connected to the anchor head of the next prestressed anchor cable. The jack is then started to continue the extension operation, and this device can continue to tension the next prestressed anchor cable.

[0008] The advantages of the above technical solution are as follows: Compared with the existing method of manually moving jacks to change their positions so that the jacks can be used to tension different prestressed anchor cables, this technical solution sets up an annular slide on the support platform. When it is necessary to change the position of the jack, the jack can be directly pushed to slide on the support platform. When the center of the jack corresponds to the tensioning hole of the prestressed anchor cable to be tensioned, the tensioning rod can be installed for tensioning. This not only saves manpower and improves the efficiency of tensioning operations, but also prevents the jack from tipping over during the sliding process, avoiding the situation where the jack falls and injures the workers, thus ensuring the safety of the workers.

[0009] Furthermore, the support platform has a positioning groove at its center, and the bottom of the jack has a positioning block that is slidably connected in the positioning groove. The cooperation between the positioning block and the positioning groove ensures that the jack always maintains the center of the support platform as its center when sliding in a circular motion on the support platform, preventing the jack from derailing during sliding and guaranteeing the stability of the jack's displacement.

[0010] Furthermore, the annular slide on the upper surface of the support platform is located on the outer ring of the tensioning hole.

[0011] Furthermore, the jack is equipped with a push rod on its side. Pushing the push rod allows the jack to slide smoothly on the support platform.

[0012] Furthermore, the push rod is fitted with an anti-slip rubber sleeve. The anti-slip rubber sleeve can prevent the hand from easily slipping off the push rod during the operation of the jack.

[0013] Furthermore, the other end of the tension rod is threadedly connected to the anchor head of the anchor cable. Attached Figure Description

[0014] Figure 1 This is a frontal cross-sectional view of the tensioning equipment during the tensioning process.

[0015] Figure 2 This is a top view of the tensioning equipment.

[0016] The reference numerals in the accompanying drawings include: connector 1, foot support 2, support leg 21, support platform 22, prestressed anchor cable 3, anchor head 4, tension hole 5, annular slide rail 6, arc-shaped slider 7, positioning groove 8, positioning block 9, tension rod 10, tension nut 11, push rod 12, rubber sleeve 13, and jack 14. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The basic implementation examples are as follows: Figure 1-2 As shown:

[0019] A prestressed cable tensioning device, such as Figure 1 As shown, the connector 1 includes a foot support 2 mounted on top of the connector 1. The connector 1 has six cable-passing holes (only two are shown in the figure), through which six prestressed anchor cables 3 are threaded. The anchor heads 4 of the six prestressed anchor cables 3 pass through the cable-passing holes and are positioned above the connector 1. A jack 14 is mounted on the foot support 2. The foot support 2 includes four support legs 21 and a support platform 22. The four support legs 21 are arranged in a square and fixed to the connector 1 by bolts. The bottom of the support platform 22 is welded to the top of all the support legs 21. Figure 2 As shown, the support platform 22 has six tensioning holes 5 corresponding to the cable threading holes, which are evenly distributed in a ring. An annular slide rail 6 is located on the upper surface of the support platform 22, surrounding the annular tensioning holes 5. An arc-shaped slider 7 is slidably connected to the bottom of the jack 14 within the annular slide rail 6. A positioning groove 8 is located at the center of the support platform 22, and a positioning block 9 is slidably connected to the bottom of the jack 14 within the positioning groove 8. A tensioning rod 10, passing through the tensioning holes 5, is inserted through the center of the jack 14. One end of the tensioning rod 10 extends out of the jack 14 and is locked by a tensioning nut 11. The other end of the tensioning rod 10 is threadedly connected to the anchor head 4 of the anchor cable. A push rod 12 is located on the side of the jack 14, and an anti-slip rubber sleeve 13 is fitted onto the push rod 12.

[0020] The specific implementation process is as follows:

[0021] The support leg 21 of the foot support 2 is fixedly installed on the connector 1. Then, the jack 14 is slidably installed on the support platform 22 of the foot support 2. At this time, the arc-shaped slider 7 is slidably connected in the annular slide rail 6, and the positioning block 9 is slidably connected in the positioning groove 8. The tension rod 10 is first passed through the center of the jack 14, and then through the tensioning hole 5 and threadedly connected to the anchor head 4 of the corresponding prestressed anchor cable 3. The part of the tension rod 10 that extends out of the jack 14 is locked by the tensioning nut 11. The extension operation of the jack 14 is started to tension the anchor cable. After tensioning is completed, the extended jack 14 retracts to its original position, the tension nut 11 is removed, the tension rod 10 is removed, and the push rod 12 is pushed to make a circular motion, thereby pushing the jack 14 to slide in a circular motion on the support platform 22 until the center of the jack 14 is aligned with the next tensioning hole 5. Then the tension rod 10 is passed through the center of the jack 14, so that the tension rod 10 is connected to the anchor head 4 of the next prestressed anchor cable 3. The jack 14 is started to continue the extension operation, and this device can continue to tension the next prestressed anchor cable 3. This equipment features a ring-shaped slide rail 6 on the support platform 22. When the position of the jack 14 needs to be changed, the jack 14 can be directly pushed to slide on the support platform 22 until its center aligns with the tensioning hole 5 of the prestressed anchor cable 3 that needs to be tensioned. Then, the tensioning rod 10 can be installed for tensioning operations. This not only saves manpower and improves the efficiency of tensioning operations, but also prevents the jack 14 from tipping over during the sliding process, thus avoiding the possibility of the jack 14 injuring the workers and ensuring their safety.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A prestressed cable tensioning device, comprising a foot support mounted on the top of a connector, the connector having a plurality of cable-passing holes, the anchor head of the prestressed anchor cable passing through the cable-passing holes and positioned above the connector, characterized in that: The foot support is equipped with a jack and includes several support legs and a support platform. The support legs are evenly distributed and fixedly supported on the connector. The support platform is fixedly connected to the top of all the support legs. The support platform has several tension holes corresponding to the cable insertion holes. An annular slide is provided on the upper surface of the support platform. An arc-shaped slider is provided at the bottom of the jack and is slidably connected in the annular slide. A tension rod passing through the tension hole is inserted through the center of the jack. One end of the tension rod extends out of the jack and is locked by a tension nut. The other end of the tension rod is detachably connected to the anchor head of the anchor cable.

2. The prestressed cable tensioning device according to claim 1, characterized in that: The support platform has a positioning groove at its center, and the bottom of the jack has a positioning block that is slidably connected in the positioning groove.

3. A prestressed cable tensioning device according to claim 2, characterized in that: The annular slide on the upper surface of the support platform is located on the outer ring of the tension hole.

4. A prestressed cable tensioning device according to claim 3, characterized in that: The jack has a push rod on its side.

5. A prestressed cable tensioning device according to claim 4, characterized in that: The push rod is fitted with an anti-slip rubber sleeve.

6. A prestressed cable tensioning device according to claim 5, characterized in that: The other end of the tension rod is threadedly connected to the anchor head of the anchor cable.

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