Anchor cable tensioning machine tool for foundation pit supporting construction

Abstract

The invention relates to the technical field of tensioning machines and tools, and discloses an anchor cable tensioning machine and tool for foundation pit supporting construction, the anchor cable tensioning machine and tool comprises a fixed assembly and a movable assembly, the movable assembly is fixedly arranged in a working shell, the movable assembly is fixedly arranged in a working shaft, and the fixed assembly and the movable assembly are connected in a sleeved mode; a base plate is arranged on the left side of the tensioning mechanism, an anchorage device is arranged on the right side of the tensioning mechanism, the base plate and the fixed assembly are coaxially arranged, and the anchorage device and the movable assembly are coaxially arranged. The steel strands penetrate through the tensioning mechanism and then need to penetrate through the fixed assembly and the movable assembly, all the steel strands are effectively separated, it is guaranteed that all the steel strands are straight, low in rotation performance and uniform in arrangement, meanwhile, through the design of a base plate and an anchorage device, it is effectively guaranteed that anchor holes of the base plate are accurately aligned with anchor holes of the anchorage device, and the construction efficiency is improved. The situation that the steel strands are twisted or even wound together during tensioning is further prevented, the accuracy of the tensioning precision is improved, and the tensile resistance of the tensioning work is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of tensioning equipment, and in particular to an anchor cable tensioning equipment for foundation pit support construction. Background Art

[0002] With the acceleration of my country's urbanization process and the increasing number of high-rise buildings, technical issues in foundation pit construction have become a concern. Foundation pit support structures refer to temporary or permanent structural measures taken during construction projects to ensure the stability of foundation pit excavation and the safety of the surrounding environment. Their core purpose is to prevent foundation pit collapse, control soil deformation, and protect the safety of adjacent buildings, underground facilities, and construction personnel. Among them, anchor cable tensioning equipment is a key equipment used in foundation pit support. It mainly consists of tensioning jacks, high-pressure oil pumps, high-pressure oil pipes, anchors, etc. The tensioning jacks are driven by the high-pressure oil pump to apply preload force to the steel strands, thereby achieving tensioning of the steel strands.

[0003] However, the existing anchor cable tensioning equipment still has some defects during use: first, the anchor cable assembly process is to pass the steel strand through the pad and the tensioning jack in sequence, and finally stably connect it with the anchor. In addition, it is necessary to ensure that each steel strand is straight, has low gyration, and is evenly arranged. However, during the assembly process, the staff cannot ensure that the anchor hole of the pad and the anchor hole of the anchor are precisely aligned. Sometimes the anchor holes at the front and rear ends of the tensioning jack are not aligned, which causes the steel strand to be easily twisted during tensioning, and even multiple steel strands to be easily entangled, thereby affecting the accuracy of the tensioning precision and reducing the tensile strength of the anchor cable; secondly, the anchor cable locking process is that the steel strand is first connected to the anchor, and then the clip is inserted into the anchor hole of the anchor to clamp the steel strand. However, during this installation process, the clip will rub against the surface of the steel strand when inserted horizontally, causing the clip to become blunt, resulting in a worse fixing and locking effect. Summary of the Invention

[0004] The present application proposes an anchor cable tensioning machine for foundation pit support construction, which has the advantages of effectively ensuring the straightness of the steel strand passing through the working shell, and improving the precise alignment between the anchor hole of the pad and the anchor hole of the anchor, thereby improving the protection efficiency of the steel strand and reducing the difficulty of installing the steel strand. At the same time, it effectively changes the way the limiting component clamps the steel strand, thereby improving the protection effect of the limiting component and extending the service life of the limiting component. It is used to solve the problem that the steel strand is easily twisted due to inaccurate positioning, and solves the problem that the limiting component is easily rubbed and becomes blunt when clamping the steel strand.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: an anchor cable tensioning machine for foundation pit support construction, comprising: A tensioning mechanism, the tensioning mechanism comprising a working shell and a working shaft, wherein the working shell and the working shaft are coaxially arranged; A fixed component and a movable component, wherein the fixed component is fixedly provided inside the working shell, and the movable component is fixedly provided inside the working shaft, and the fixed component and the movable component are sleeved with each other; A pad and an anchor, wherein the tensioning mechanism is provided with a pad on the left side and an anchor on the right side, the pad is coaxially arranged with the fixed component, and the anchor is coaxially arranged with the movable component; Steel strands, each of which passes through a pad, a fixed assembly, a movable assembly, and an anchor in sequence; The fixed component and the movable component both include a disc, an arc plate and a round block. The disc is provided with a round hole, and the round holes on the two discs are one-to-one corresponding. One end of the arc plate is fixedly connected to the round hole of one disc, and the other end of the arc plate is movably connected to the round hole of the other disc. Four arc plates are arranged around the outer side of one steel strand, and the two oppositely arranged arc plates are fixedly connected to the same disc. A group of round blocks is fixedly connected to the wall surface of one disc, and the round blocks are not on the same side as the arc plates. A circular groove is provided on the side of the pad close to the fixed component, and a circular groove is provided on the side close to the anchor of the movable component. The pad and the anchor are movably connected to the two groups of round blocks through the circular grooves respectively, so that multiple steel strands can be separated from each other, ensuring that each steel strand is straight, has low gyratory properties and is evenly arranged.

[0006] Furthermore, the tensioning mechanism further includes: An oil chamber is provided on the wall of the working housing, and the working housing is movably connected to the working shaft through the oil chamber; A tensioning oil inlet is fixedly connected to the left side of the outer wall of the working shell, and the tensioning oil inlet is communicated with the left end of the oil chamber; A return oil inlet is fixedly connected to the right side of the outer wall of the working shell, and the return oil inlet is communicated with the right end of the oil cavity.

[0007] Furthermore, the fixed component and the movable component further include: The cross-sectional shape of the arc plate is an arc with an included angle of 90 degrees, and the cross-sectional shapes of the four arc plates form a circle.

[0008] Furthermore, anchor holes are provided on the base plate and the anchor, and the base plate and the anchor are movably connected to the steel strands through the anchor holes respectively.

[0009] Furthermore, the anchor comprises: A connecting plate, wherein the anchor hole of the connecting plate is in the shape of a truncated cone that is narrow on the left and wide on the right; A front plate, the front plate being threadedly sleeved on the left side of the connecting plate, the anchor hole of the front plate being cylindrical, and the diameter of the anchor hole of the front plate being smaller than the diameter of the left end of the anchor hole of the connecting plate; The rear plate is threadedly sleeved on the right side of the connecting plate. The anchor hole of the rear plate is cylindrical, and the diameter of the anchor hole of the rear plate is smaller than the diameter of the right end of the anchor hole of the connecting plate.

[0010] Furthermore, the anchor is provided with: A limiting component is provided in the anchor hole of the connecting plate; A pressure component is provided in the connecting plate.

[0011] Furthermore, the limiting component includes: A group of clips is movably sleeved in one anchor hole of the connecting plate, and the group of clips consists of four clips arranged around the center of the anchor hole. When the group of clips is retracted inward, the outer wall of the group of clips is in the shape of a truncated cone with a narrow left side and a wide right side, and the inner wall is clamped with the steel strand; The limiting piece, the outer wall of the right end of one of the clips is fixedly connected to the bottom end of the limiting piece, four limiting grooves are opened on the wall of the anchor hole of the connecting plate, and the connecting plate is movably connected to the top end of the limiting piece through the limiting grooves, and the limiting piece is composed of a limiting shell and a limiting rod, the limiting shell and the limiting rod are movably sleeved, and the two are connected by a spring.

[0012] Furthermore, the pressure component includes: The pressure plate has a movable groove on the left side wall of the connecting plate, and the connecting plate is movably connected to the pressure plate through the movable groove. The pressure plate is composed of a plurality of circular rings and a plurality of straight plates, and the two circular rings are connected by a straight plate. The circular ring is movably connected to the outer side of the left end of the clip, and the outer wall of the circular ring is cylindrical, and the inner wall of the circular ring is frustum-shaped; A pressure piece is provided in an anchor hole of the connecting plate, and the number of pressure pieces in a group is four. One of the circular rings is connected to a group of pressure pieces, and the outer side of the pressure piece is fixedly connected to the wall surface of the anchor hole that is not located at the movable groove position. The inner side of the pressure piece contacts the outer wall of the clip, and the pressure piece has resilience.

[0013] Furthermore, the circular groove is located on the front plate and is connected to the movable groove. The circular block on the movable component is an electromagnet, and there is a magnetic repulsion force between the circular block and the pressure plate when energized.

[0014] The beneficial effects of the present invention are as follows: The present application provides an anchor cable tensioning machine for foundation pit support construction, which has a fixed component fixedly arranged in a working shell and a movable component fixedly arranged in a working shaft, and the fixed component and the movable component are designed to be socketed with each other. The steel strands need to pass through the fixed component and the movable component when passing through the tensioning mechanism, effectively separating the individual steel strands, ensuring that each steel strand is straight, has low gyration, and is evenly arranged. At the same time, the fixed component and the movable component are composed of a disc, an arc plate, and a round block, and the fixed component is coaxially arranged with the pad using the round block, and the movable component is coaxially arranged with the anchor using the round block, thereby effectively ensuring that the anchor hole of the pad is precisely aligned with the anchor hole of the anchor, further preventing the steel strands from twisting or even entangled during tensioning, improving the accuracy of tensioning precision, and enhancing the tensile strength of the tensioning work.

[0015] The anchor is composed of a connecting plate, a front plate and a rear plate, and a limit assembly and a pressure assembly are arranged in the anchor. Before the steel strand passes through the anchor, the limit assembly and the pressure assembly are assembled into the anchor hole of the connecting plate and are stably fixed by the front plate and the rear plate. At the same time, the assembled anchor can be moved as a whole and can be reused, which effectively reduces the assembly and disassembly steps and improves work efficiency. When the steel strand passes through the anchor, the steel strand will pass through the front plate, the connecting plate and the rear plate in turn, and the steel strand will not contact and rub against the limit assembly. When the round block on the movable assembly is inserted into the front plate on the anchor After the tensioning is completed, the round block is powered on to generate a magnetic repulsive force on the pressure plate, so as to push the pressure plate to the right and squeeze the pressure piece to move the clamp toward the steel strand and stably lock the steel strand. When the tensioning is completed, the round block is powered off to restore the limit assembly and the pressure assembly to their original state, and no longer lock the steel strand. Therefore, when the anchor withdraws from the steel strand, it does not contact and rub with the steel strand. Therefore, during assembly and disassembly, the frequency of friction between the limit assembly and the steel strand is effectively reduced, the passivation speed of the limit assembly is slowed down, the fixing effect of the limit assembly is enhanced, and the service life of the limit assembly is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work. Figure 1 It is a three-dimensional structural diagram of the whole of the present invention; Figure 2 It is a cross-sectional three-dimensional structural diagram of the entire present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of point A; Figure 4A three-dimensional structural diagram of the tensioning mechanism, fixed components, movable components and steel strands located in a cross section of the tensioning mechanism of the present invention; Figure 5 It is a three-dimensional structural diagram of the fixed component, movable component and steel strand in the present invention; Figure 6 A three-dimensional structural diagram of the present invention in a state where the fixed component and the movable component are pulled apart; Figure 7 It is a three-dimensional structural diagram of the pad and anchor in the present invention; Figure 8 It is a cross-sectional three-dimensional structural diagram of the pad and anchor in the present invention; Figure 9 It is a cross-sectional three-dimensional structural diagram of the anchor in the present invention; Figure 10 For the present invention Figure 9 The enlarged structure diagram at B; Figure 11 It is a cross-sectional three-dimensional structural diagram of the connecting plate, front plate and rear plate in the disassembled state in the present invention; Figure 12 It is a three-dimensional structural diagram of the limit assembly and the pressure assembly in the present invention; Figure 13 It is a three-dimensional structural diagram of the limiting component in the present invention; Figure 14 It is a three-dimensional structural diagram of the pressure component in the present invention.

[0017] In the figure: 1. Tensioning mechanism; 11. Working shell; 12. Working shaft; 13. Tensioning oil inlet; 14. Return oil inlet; 2a. Fixed component; 2b. Movable component; 21. Disc; 22. Arc plate; 23. Round block; 3. Steel strand; 4. Pad; 5. Anchor; 51. Connecting plate; 52. Front plate; 53. Rear plate; 6. Limiting component; 61. Clip; 62. Limiting piece; 621. Limiting shell; 622. Limiting rod; 7. Pressure component; 71. Pressure plate; 72. Pressure piece. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Embodiment 1, an anchor cable tensioning machine for foundation pit support construction, comprising a working shell 11, such as Figure 1-Figure 2 、 Figure 4, an oil chamber is opened on the wall of the working shell 11, and the working shell 11 is movably connected to the working shaft 12 through the oil chamber. The working shell 11 and the working shaft 12 are coaxially arranged, which effectively ensures the stability of the tensioning mechanism 1 in performing tensioning work. A tensioning oil inlet 13 is fixedly connected to the left side of the outer wall of the working shell 11, and one end of the tensioning oil inlet 13 is communicated with the left end of the oil chamber, and the other end of the tensioning oil inlet 13 is communicated with the high-pressure oil pipe. A return oil inlet 14 is fixedly connected to the right side of the outer wall of the working shell 11, and one end of the return oil inlet 14 is communicated with the right end of the oil chamber, and the other end of the return oil inlet 14 is communicated with the high-pressure oil pipe. The two high The pressure oil pipe is connected to the high-pressure oil pump at the same time, so that hydraulic oil can be sucked by the high-pressure oil pump to change the amount of oil passing through the tensioning oil inlet 13 and the return oil inlet 14, thereby realizing the movement of the working shaft 12 on the working shell 11. Specifically, if the tensioning oil inlet 13 is filled with hydraulic oil, the return oil inlet 14 discharges the hydraulic oil, so that the working shaft 12 moves to the right along the working shell 11; if the tensioning oil inlet 13 is discharged with hydraulic oil, the return oil inlet 14 is filled with hydraulic oil, so that the working shaft 12 moves to the left along the working shell 11, thereby realizing the tensioning work of the tensioning mechanism 1. In summary, the working shell 11, the working shaft 12, the tensioning oil inlet 13 and the return oil inlet 14 constitute the tensioning mechanism 1.

[0020] like Figure 1-Figure 2 、 Figure 4-Figure 5 The anchor cable is usually composed of multiple steel strands 3. According to actual conditions, the number of steel strands 3 for medium-sized support is 4 to 7 steel strands 3. Therefore, five steel strands 3 are arranged in the tensioning mechanism 1 of the anchor cable tensioning device, and the steel strands 3 are a standard 1*7 structure of 1 straight core wire + 6 spirally wound wires, so that the cross-section of the steel strands 3 is a tight spiral circle.

[0021] like Figure 4-Figure 6 The interior of the working housing 11 is fixedly provided with a fixed component 2a, and the interior of the working shaft 12 is fixedly provided with a movable component 2b. The fixed component 2a and the movable component 2b are mutually sleeved. The fixed component 2a and the movable component 2b both include a disc 21, an arc plate 22 and a round block 23. Figure 2, a circular hole is opened on the disc 21, and the circular holes on the two discs 21 are one-to-one corresponding, which effectively ensures the horizontality of the steel strand 3 after passing through the two discs 21. One end of the arc plate 22 is fixedly connected to the circular hole of one disc 21, and the other end of the arc plate 22 is movably connected to the circular hole of the other disc 21. The cross-sectional shape of the arc plate 22 is an arc with an angle of 90 degrees, and the cross-sectional shape of the four arc plates 22 forms a circle. Four arc plates 22 are arranged around the outside of a steel strand 3, and the two arc plates 22 arranged opposite to each other are fixedly connected to the same disc 21. On the other hand, the two groups of arc plates 22 on the two discs 21 are in a movable clamping state with each other, which effectively ensures that the horizontality of the two discs 21 remains unchanged when the distance between them changes, so that the steel strands 3 arranged therein are always arranged horizontally without bending, and the steel strands 3 will not be entangled with each other. A group of round blocks 23 are fixedly connected to the wall of a disc 21, and the round blocks 23 are not on the same side as the arc plates 22. The round blocks 23 can be used to effectively limit the installation position of the pad 4 and the anchor 5, thereby reducing the difficulty of aligning the pad 4 and the anchor 5.

[0022] like Figure 1-Figure 2 、 Figure 7 A pad 4 is provided on the left side of the tensioning mechanism 1, and the pad 4 is coaxially arranged with the fixed component 2a, and an anchor 5 is provided on the right side of the tensioning mechanism 1, and the anchor 5 is coaxially arranged with the movable component 2b. Anchor holes are provided on the pad 4 and the anchor 5, and the pad 4 and the anchor 5 are respectively movably connected with the steel strand 3 through the anchor holes. A circular groove is provided on the side of the pad 4 close to the fixed component 2a, and a circular groove is provided on the side of the anchor 5 close to the movable component 2b. If the pad 4 and the anchor 5 are respectively movably connected with the two groups of round blocks 23 through the circular grooves, the anchor holes of the pad 4, the anchor holes of the anchor 5, the circular holes of the fixed component 2a, and the circular holes of the movable component 2b are all precisely aligned. It should be noted that rubber pads are sleeved in the circular grooves, which effectively enhance the connection stability between the fixed component 2a and the pad 4, and between the movable component 2b and the anchor 5.

[0023] Each steel strand 3 passes through the pad 4, fixed component 2a, movable component 2b and anchor 5 in sequence, which can separate multiple steel strands 3 from each other, ensuring that each steel strand 3 is straight, has low gyration, and is evenly arranged, thereby effectively preventing the steel strands 3 from twisting or even getting entangled during tensioning, improving the accuracy of tensioning precision, and enhancing the tensile strength of the tensioning work.

[0024] Example 2, based on Example 1, Figure 2-Figure 3 、 Figure 7-Figure 8 , the anchor 5 includes a connecting plate 51, a front plate 52 and a rear plate 53, as shown Figure 11The front plate 52 is threadedly sleeved on the left side of the connecting plate 51, and the rear plate 53 is threadedly sleeved on the right side of the connecting plate 51, so as to facilitate the disassembly and assembly of the connecting plate 51, the front plate 52 and the rear plate 53. The anchor hole of the connecting plate 51 is a cone-shaped truncated cone with a narrow left side and a wide right side, which effectively cooperates with the pressure component 7 to achieve the stability of the limit component 6 clamping the steel strand 3. The anchor hole of the front plate 52 is cylindrical, and the diameter of the anchor hole of the front plate 52 is smaller than the diameter of the left end of the anchor hole of the connecting plate 51. The anchor hole of the rear plate 53 is cylindrical, and the diameter of the anchor hole of the rear plate 53 is smaller than the diameter of the right end of the anchor hole of the connecting plate 51. The anchor hole design of the front plate 52 and the rear plate 53 is used to ensure that the limit component 6 is stably set in the anchor hole of the connecting plate 51.

[0025] like Figure 2-Figure 3 , a limit assembly 6 is provided on the anchor 5, and a limit assembly 6 is provided in the anchor hole of the connecting plate 51, which can realize the locking of the steel strand 3. The limit assembly 6 includes a clip 61 and a limit member 62, such as Figure 7-13 A group of clips 61 is movably sleeved in an anchor hole of the connecting plate 51, and a group of clips 61 consists of four clips 61 arranged around the center of the anchor hole. When a group of clips 61 retracts inward, the outer wall is narrow on the left and wide on the right, and the inner wall is clamped with the steel strand 3. At this time, a group of clips 61 can effectively lock a steel strand 3, and the outer wall of the right end of a clip 61 is fixedly connected to the bottom end of the limiter 62. Four limit grooves are provided on the wall surface of the anchor hole of the connecting plate 51, and the connecting plate 51 is movably clamped with the top of the limiter 62 through the limit grooves, so that when it is not squeezed by the pressure component 7, the limiter 62 can be used to control the clip 61 to always be close to the anchor hole. The position near the anchor hole wall, that is, the four clips 61 are in a dispersed state, so that the clips 61 will not contact and rub with the steel strand 3. The limit member 62 is composed of a limit shell 621 and a limit rod 622. The limit shell 621 and the limit rod 622 are movably connected, and the two are connected by a spring. Therefore, when the limit component 6 is not squeezed by the pressure component 7, the limit shell 621 and the limit rod 622 can be pulled closer by the spring to achieve the overall shortening of the limit member 62. In addition, air holes can be opened on the wall of the limit shell 621 as needed, so that the limit member 62 can squeeze the air out when it returns to its original state, which has the function of cleaning the anchor hole of the connecting plate 51.

[0026] like Figure 2-Figure 3 , a pressure assembly 7 is provided on the anchor 5, and a pressure assembly 7 is provided in the connecting plate 51, which can push the limit assembly 6 to move toward the steel strand 3 to lock the steel strand 3. The pressure assembly 7 includes a pressure plate 71 and a pressure piece 72, such as Figure 7-14The left side wall of the connecting plate 51 is provided with a movable groove, and the connecting plate 51 is movably connected to the pressure plate 71 through the movable groove, so that the pressure plate 71 can move left and right in the movable groove in the horizontal direction. The pressure plate 71 is composed of several circular rings and several straight plates, and the two circular rings are connected by a straight plate. The circular ring is movably connected to the outer side of the left end of the clamping piece 61, and the outer wall of the circular ring is cylindrical, and the inner wall of the circular ring is frustum-shaped. When the circular ring is located at the leftmost end of the movable groove, the circular ring does not apply an extrusion force to the clamping piece 61. At this time, the four clamping pieces 61 are in a dispersed state and will not contact and rub with the steel strand 3. When the circular ring gradually moves to the right until it is located at the rightmost end of the movable groove, the circular ring gradually applies an extrusion force to the clamping piece 61 to cause the four clamping pieces 61 to shrink inward until When the locking cam 72 is in the unlocked position, the locking cam 72 is in the unlocked position, and the locking cam 72 is in the unlocked position, so that the locking cam 72 is locked.

[0027] Further, such as Figure 7-Figure 9 、 Figure 11 The circular groove is located on the front plate 52, and the circular groove is connected to the movable groove. Before the circular block 23 is energized, it should be ensured that the circular block 23 on the movable component 2b has been inserted into the front plate 52 on the anchor 5, so that the circular block 23 can apply magnetic force to the pressure component 7. The circular block 23 on the movable component 2b is an electromagnet, and when the circular block 23 is energized, there is a magnetic repulsion between the pressure plate 71, thereby moving the pressure plate 71 and compressing the pressure piece 72, so as to realize the deformation of the limit component 6 and lock the steel strand 3. It should be noted that the circuit used by the circular block 23 and the circuit used by the tensioning mechanism 1 are connected to the same power supply, and when the power is on, the circular block 23 is energized first and the tensioning mechanism 1 is energized later. When the power is off, the tensioning mechanism 1 is de-energized first and the circular block 23 is de-energized later.

[0028] The working principle of the method of use of the present invention is as follows: When assembling the anchor 5, first install the pressure component 7 on the connecting plate 51, then put the front plate 52 on the left side of the connecting plate 51, and then install multiple groups of limiting components 6 in each anchor hole of the connecting plate 51, and make the four clips 61 act in a dispersed state under the action of the limiting parts 62, and finally put the front plate 52 on the right side of the connecting plate 51, thereby completing the assembly of the anchor 5 for subsequent use.

[0029] Before tensioning, the steel strands 3 first pass through the pad 4, the fixed component 2a, the movable component 2b and the anchor 5 in sequence, and then adjust the position so that one group of round blocks 23 are inserted into the circular groove of the pad 4, and the other group of round blocks 23 are inserted into the circular groove of the anchor 5. At this time, the anchor holes of the pad 4, the circular holes of the fixed component 2a, and the circular holes of the movable component 2b are precisely aligned, so that each steel strand 3 has a separate moving path, effectively separating the multiple steel strands 3 from each other, ensuring that each steel strand 3 is straight, low in gyration, and evenly arranged, thereby effectively preventing the steel strands 3 from twisting or even entangled during tensioning. Occurs, improves the accuracy of tensioning precision, enhances the tensile strength of tensioning work, and then energizes the block 23 on the movable component 2b. At this time, since the block 23 is stably inserted into the front plate 52, a steady magnetic repulsion force can be applied to the pressure plate 71 to push the pressure plate 71 to move backward and squeeze the pressure piece 72. At this time, the clip 61 is pushed by the pressure plate 71 and moves toward the steel strand 3 to achieve locking of the steel strand 3. At the same time, the pressure piece 72 is pushed by the pressure plate 71 and compressed and thickened to achieve full filling of the gap between the clip 61 and the anchor hole, further enhancing the stability of the locked steel strand 3.

[0030] During tensioning, the tensioning mechanism 1 is energized to drive the hydraulic oil in and out of the tensioning oil inlet 13 and the return oil inlet 14, so as to realize the horizontal movement of the working shaft 12 along the working shell 11, so that the movable component 2b can move horizontally along the fixed component 2a, and then drive the anchor 5 to perform the tensioning operation on the steel strand 3. When the tensioning is completed, the tensioning mechanism 1 is powered off.

[0031] After tensioning, the power is cut off to the round block 23 on the movable component 2b, so that the pressure plate 71 returns to its original state under the action of the rebound force of the pressure piece 72, and the clip 61 no longer locks the steel strand 3 under the action of the limit piece 62, and then the anchor 5, pad 4, etc. are removed from the steel strand 3. In summary, during the assembly and disassembly process, the limit component 6 in the anchor 5 does not rub against the steel strand 3, which effectively slows down the passivation speed of the limit component 6, enhances the fixing effect of the limit component 6 when locking the steel strand 3, and extends the service life of the limit component 6.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anchor cable tensioning machine for foundation pit support construction, characterized in that: include: A tensioning mechanism (1), the tensioning mechanism (1) comprising a working housing (11) and a working shaft (12), wherein the working housing (11) and the working shaft (12) are coaxially arranged; A fixed component (2a) and a movable component (2b), wherein the fixed component (2a) is fixedly provided inside the working housing (11), and the movable component (2b) is fixedly provided inside the working shaft (12), and the fixed component (2a) and the movable component (2b) are sleeved together; A pad (4) and an anchor (5), wherein the tensioning mechanism (1) is provided with a pad (4) on the left side and an anchor (5) on the right side, the pad (4) and the fixed component (2a) are coaxially arranged, and the anchor (5) and the movable component (2b) are coaxially arranged; Steel strands (3), each of the steel strands (3) sequentially passing through a pad (4), a fixed component (2a), a movable component (2b), and an anchor (5); The fixed component (2a) and the movable component (2b) both include a disc (21), an arc plate (22) and a round block (23). The disc (21) is provided with a round hole, and the round holes on the two discs (21) are in one-to-one correspondence. One end of the arc plate (22) is fixedly connected to the round hole of one disc (21), and the other end of the arc plate (22) is movably connected to the round hole of the other disc (21). Four arc plates (22) are arranged around the outer side of one of the steel strands (3), and two arc plates (22) arranged opposite to each other are fixedly connected. On the same disc (21), a wall surface of one of the discs (21) is fixedly connected to a group of round blocks (23), and the round blocks (23) are not on the same side as the arc plate (22). A circular groove is provided on the side of the pad (4) close to the fixed component (2a), and a circular groove is provided on the side of the anchor (5) close to the movable component (2b). The pad (4) and the anchor (5) are movably connected to the two groups of round blocks (23) through the circular grooves, so that multiple steel strands (3) can be separated from each other, ensuring that each steel strand (3) is straight, has low gyratory properties, and is evenly arranged.

2. The anchor cable tensioning machine for foundation pit support construction according to claim 1, characterized in that: The tensioning mechanism (1) further comprises: An oil chamber is provided on the wall of the working housing (11), and the working housing (11) is movably sleeved with the working shaft (12) through the oil chamber; A tensioning oil inlet (13), wherein the left side of the outer wall of the working housing (11) is fixedly connected with the tensioning oil inlet (13), and the tensioning oil inlet (13) is communicated with the left end of the oil chamber; A return oil inlet (14) is fixedly connected to the right side of the outer wall of the working housing (11), and the return oil inlet (14) is communicated with the right end of the oil chamber.

3. The anchor cable tensioning machine for foundation pit support construction according to claim 2, characterized in that: The fixed component (2a) and the movable component (2b) further include: The cross-sectional shape of the arc plate (22) is an arc with an included angle of 90 degrees, and the cross-sectional shapes of the four arc plates (22) form a circle.

4. The anchor cable tensioning machine for foundation pit support construction according to claim 3, characterized in that: Anchor holes are provided on the pad (4) and the anchor (5), and the pad (4) and the anchor (5) are movably connected to the steel strand (3) through the anchor holes.

5. The anchor cable tensioning machine for foundation pit support construction according to claim 4, characterized in that: The anchor (5) comprises: A connecting plate (51), wherein the anchor hole of the connecting plate (51) is in the shape of a truncated cone with a narrow left side and a wide right side; A front plate (52), the front plate (52) being threadedly sleeved on the left side of the connecting plate (51), the anchor hole of the front plate (52) being cylindrical, and the diameter of the anchor hole of the front plate (52) being smaller than the diameter of the left end of the anchor hole of the connecting plate (51); The rear plate (53) is threadedly sleeved on the right side of the connecting plate (51); the anchor hole of the rear plate (53) is cylindrical, and the diameter of the anchor hole of the rear plate (53) is smaller than the diameter of the right end of the anchor hole of the connecting plate (51).

6. The anchor cable tensioning machine for foundation pit support construction according to claim 5, characterized in that: The anchor (5) is provided with: A limiting component (6), wherein the limiting component (6) is provided in the anchor hole of the connecting plate (51); A pressure component (7) is provided in the connecting plate (51).

7. The anchor cable tensioning machine for foundation pit support construction according to claim 6, characterized in that: The limiting component (6) includes: A clip (61), wherein a group of clips (61) is movably sleeved in an anchor hole of the connecting plate (51), and the group of clips (61) is composed of four clips (61) arranged around the center of the anchor hole. When the group of clips (61) is retracted inward, the outer wall is in a frustum shape with a narrow left side and a wide right side, and the inner wall is clamped with the steel strand (3); The limiting member (62) includes a right end outer wall of the clip (61) and a bottom end of the limiting member (62). The anchor hole wall of the connecting plate (51) is provided with four limiting grooves, and the connecting plate (51) is movably connected to the top end of the limiting member (62) through the limiting grooves. The limiting member (62) is composed of a limiting shell (621) and a limiting rod (622). The limiting shell (621) and the limiting rod (622) are movably sleeved and connected by a spring.

8. The anchor cable tensioning machine for foundation pit support construction according to claim 7, characterized in that: The pressure component (7) comprises: A pressure plate (71), a movable groove is provided on the left wall surface of the connecting plate (51), and the connecting plate (51) is movably connected to the pressure plate (71) through the movable groove, and the pressure plate (71) is composed of a plurality of circular rings and a plurality of straight plates, and the two circular rings are connected by a straight plate, and the circular ring is movably connected to the outer side of the left end of the clamping piece (61), and the outer wall of the circular ring is cylindrical, and the inner wall of the circular ring is frustum-shaped; A pressure piece (72), a group of pressure pieces (72) is provided in an anchor hole of the connecting plate (51), and the number of the group of pressure pieces (72) is four, one of the circular rings is connected to the group of pressure pieces (72), and the outer side of the pressure piece (72) is fixedly connected to the wall surface of the anchor hole that is not located at the position of the movable groove, the inner side of the pressure piece (72) is in contact with the outer wall of the clip (61), and the pressure piece (72) has resilience.

9. The anchor cable tensioning machine for foundation pit support construction according to claim 8, characterized in that: The circular groove is located on the front plate (52) and is connected to the movable groove. The circular block (23) on the movable component (2b) is an electromagnet, and when the circular block (23) is energized, there is a magnetic repulsion force between the pressure plate (71).

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