Traction rope construction method for cable erection and anchor rope specification calculation method

Abstract

The invention discloses a traction rope construction method for cable erection and an anchor rope specification calculation method, and relates to the technical field of cable erection, and the method comprises the following steps: 1, using a traction machine and a tension machine to cooperate with low tension to forward drive a traction rope to pass through a corresponding area; secondly, a walking board with a head and a tail is additionally arranged, the traction rope is connected with a rotary connector on the head of the walking board, and meanwhile the rotary connector on the tail of the walking board is connected with A guide ropes distributed side by side; and thirdly, a traction machine and a tension machine are matched with each other to drive the walking board to pass through a middle pulley of a pulley block on the tower in the low-tension forward direction, the pulley block is provided with A pulleys, and at the moment, A guide ropes including the middle guide rope are all wound on the middle pulley. According to the method, the one-traction-multiple construction mode is achieved, the erecting efficiency of the wire is improved, the anchor rope with the proper specification is optimally selected through the anchor rope calculation formula, and anchoring operation is better achieved through the anchor rope with the proper specification.

Description

Technical Field

[0001] The present invention relates to the technical field of cable installation, and in particular to a traction rope construction method for cable installation and an anchor rope specification calculation method. Background Art

[0002] In recent years, with the large-scale development and export of clean energy in western my country, the construction of UHV transmission lines has ushered in a booming development. As the most important part of UHV transmission line construction, the wiring technology has also developed from the initial manpower deployment to the current full-tension wiring construction.

[0003] After the UHV tower is assembled and accepted, tension wire laying construction is required to complete the installation of the transmission line. The method of laying out the conductor (ground) wire by using construction machinery such as traction machines and tension machines to make it leave the ground and obstacles in an overhead state during the laying process is called tension wire laying. The tension wire laying in the prior art can be expressed as follows:

[0004] Step 1: Unfold the guide rope. Unfold the primary guide rope using an aircraft, pass it through the line-laying pulley step by step with manual assistance, and connect it to the temporary section after unfolding it in sections. Use the already laid guide rope to pull other high-level guide ropes.

[0005] Step 2: The guide rope is pulled and the traction rope is released. The guide rope is reeled in with a small traction machine, thereby replacing the guide rope in the construction section with the traction rope.

[0006] Step 3: Use the traction rope to pull the conductor. Use the main traction machine to reel in the traction rope, thereby replacing the traction rope in the construction section with the conductor.

[0007] In the above step 1, the guide rope needs to be threaded onto the pulley at the corresponding position during the deployment and traction process. Multiple guide ropes correspond to multiple pulleys respectively, and thus the deployment and traction of multiple guide ropes require multiple threading operations. This construction method has many repetitive operating procedures, consumes a lot of time, and easily prolongs the construction period.

[0008] The guide rope deployment operation usually adopts distributed deployment, that is, a line section needs to be cut into 2-5 small sections. First, a rotorcraft drone is used to deploy the primary guide rope in the small section, and then the primary guide rope is gradually transitioned to the traction rope of the corresponding specifications. Then the traction ropes in several areas are connected to each other to form a whole.

[0009] by Figure 1 For example, Figure 1 It means that firstly, a Φ3.5 primary guide rope is deployed by a rotary wing drone, and then it is gradually transitioned to a □13 traction rope. Then, the □13 traction ropes in each block are connected to form a whole. The □13 traction rope is then pulled by a traction machine and a tension machine until it is gradually transitioned to a □28 traction rope.

[0010] Even if construction parties in various places make improvements based on the above construction methods according to local conditions, for example, the patent document with the authorization announcement number CN204760879U discloses a device for deploying guide ropes for live working drones, which aims to improve deployment efficiency by optimizing and improving the steps of deploying guide ropes for drones. Specifically, the device includes a drone, a deployment reel, a remote control, a steel weight and a release device, the release device is fixed under the drone fuselage, and an annular electromagnet is provided inside, the outer diameter of the weight matches the inner diameter of the annular electromagnet, and can be fixed or released by the annular electromagnet, the tail of the weight fixes the guide rope, and the other end of the guide rope is fixed to the deployment reel through an insulating transfer rope, and the drone and the release device are controlled by a remote control.

[0011] For another example, the patent document with application publication number CN117228433A discloses a miniature high-speed tension machine device, which designs a power unit and a tension unit on the tension machine body so that the tension machine has the ability to actively adjust the tension of the guide rope. When the guide rope is wrapped around the tension wheel, the drone pulls the guide rope, and the guide rope pulls the tension wheel to rotate. The tension unit realizes the tension of the guide rope by changing the power of the rotating drive structure and can perform stepless adjustment to ensure that the guide rope is not easy to get knotted, fall out of the groove, or become disordered.

[0012] Based on the wire traction construction methods and improvements in the prior art, it can be seen that the wire traction construction methods in the prior art have the disadvantages of complicated operating steps and large workload, and a large number of tension machines and traction machines are required, which increases the construction cost. At the same time, during the construction process, construction personnel are required to perform high-altitude auxiliary traction operations many times. Long-term high-intensity high-altitude operations can easily make workers fatigued and cause accidents.

[0013] To this end, we propose a traction rope construction method for cable installation and an anchor rope specification calculation method to solve the above problems. Summary of the invention

[0014] The purpose of the present invention is to solve the problems in the prior art and to propose a traction rope construction method for cable installation and an anchor rope specification calculation method. In the construction method, a "one-traction-many" construction method is realized by setting structures such as a walking board, thereby improving the installation efficiency of the conductors; and an anchor rope calculation formula is used to optimize the selection of anchor ropes of appropriate specifications, so that during the cable installation process, construction personnel can conveniently operate the anchor ropes to perform corresponding actions, thereby shortening the construction time of the entire cable installation and further improving the installation efficiency of the conductors.

[0015] To solve the above problems, the present invention provides the following technical solutions:

[0016] A traction rope construction method for cable installation comprises the following steps:

[0017] Step 1: Use a traction machine and a tension machine with low tension to drive the traction rope forward to the corresponding area;

[0018] Step 2: Add a walking board with a head and a tail, connect the traction rope to the rotary connector at the head of the walking board, and connect A parallel guide ropes to the rotary connector at the tail of the walking board;

[0019] Step 3: Use the traction machine and the tension machine to drive the walking plate forward through the middle pulley of the pulley group on the tower with low tension. The pulley group has A pulleys. At this time, A guide ropes including the middle guide rope are all wound around the middle pulley;

[0020] Step 4: The construction personnel use the A-1 anchor rope to temporarily anchor the A-1 guide ropes except the middle guide rope on the pole tower in turn, and drive the traction rope and the A guide rope to move in the opposite direction together until the A-1 anchor ropes are all in a taut state;

[0021] Step 5: Keep the A-1 anchor rope in a taut state, and continue to pull the middle guide rope in the reverse direction with the traction rope until the A-1 guide ropes are all in a loose state;

[0022] Step 6: Then release the connection between the A-1 guide ropes and the tail of the walking board, wind the A-1 guide ropes out from the middle pulley of the pulley group, and wind them on the other A-1 pulleys of the pulley group in sequence, and then connect the A-1 guide ropes to the rotary connectors at the tail of the walking board respectively;

[0023] Step 7: Finally, the traction rope is driven to move forward until the end of the A-1 anchor rope connected to the A-1 guide rope is in a loose state, and then the connection between the A-1 anchor rope and the A-1 guide rope is released, that is, the rope separation work is completed, so that the A guide ropes are respectively wound around the A pulleys on the pulley group;

[0024] Step 8: Subsequently, the A cables to be erected in the corresponding area are connected to the A guide ropes respectively and pulled to the designated position by a traction machine and a tension machine to complete the construction.

[0025] As a further solution: four guide ropes are provided, and the head and tail of the walking board are respectively fixed with a rotary connector and three rotary connectors, and the three rotary connectors are arranged in parallel, the rotary connector at the head is used for connecting the traction rope, and the three rotary connectors at the tail are respectively used for connecting the three guide ropes; a rotary connector for connecting the remaining guide rope is provided at the tail of the walking board and above the middle rotary connector.

[0026] As a further solution: the pulley group consists of four groups of pulleys, three groups of pulleys are horizontally arranged in parallel on the first cross arm of the pole tower, and the remaining group of pulleys is arranged on the second cross arm of the pole tower, and the pulley is located above the three groups of pulleys.

[0027] As a further solution: before performing step 1, the following preliminary preparation steps are also included:

[0028] S1: Use drone to deploy primary guide rope;

[0029] S2: Connect the primary guide rope to the primary guide rope, and use the traction machine and tension machine to pull the primary guide rope with low tension;

[0030] S3: Connect the primary guide rope with the secondary guide rope, and use the traction machine and the tension machine to pull the secondary guide rope with low tension;

[0031] S4: Connect the secondary guide rope to the traction rope, and use the traction machine and tension machine to drive the traction rope with low tension.

[0032] Furthermore, the present invention also proposes a method for calculating the specifications of an anchor rope, which is used to calculate the specifications of the anchor rope so as to be adaptively applied to the above-mentioned traction rope construction method for cable erection, and the specifications of the anchor rope are obtained by a calculation formula of the construction load to be borne;

[0033] Construction load T borne by anchor rope i The calculation formula is as follows:

[0034] T i =L i ×g;

[0035] Where: T i It is expressed as the construction load borne by the anchor rope between the i-1th tower and the i-th tower, L i It is expressed as the length of the guide rope between the i-1th tower and the i-th tower line, and g is expressed as the gravity load per unit length of the guide rope.

[0036] As a further solution: the guide rope length L in the above formula i The calculation formula is as follows:

[0037]

[0038] Where: It is expressed as the inclination angle of the line connecting the i-1th tower and the i-th tower wire suspension point, l i It is represented by the distance between the i-1th tower and the i-th tower line, g is represented by the gravity load per unit length of the guide rope, F i Expressed as the horizontal pay-out tension of the guide rope.

[0039] As a further solution: the tilt angle in the above formula The calculation formula is as follows:

[0040]

[0041] Where: Δh i It is expressed as the height difference between the suspension point of the guide rope of the i-1th tower and the i-th tower, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

[0042] As a further solution: horizontal tension F of the guide rope i The calculation formula is as follows:

[0043]

[0044] Where: x represents the horizontal distance from the obstacle between the i-1th tower and the i-th tower to the hanging point on the traction side of the i-th tower, m represents the distance from the hanging point on the traction side of the i-th tower to the ground, y represents the clearance distance from the obstacle between the i-1th tower and the i-th tower to the guide rope, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The present invention adds a walking board for transferring the traction rope and the guide rope, and uses the walking board to realize the "one-to-many" traction work, so that a single traction rope can pull multiple guide ropes at the same time. Compared with the "one-to-one" traction in the prior art, the present invention shortens the construction time and improves the construction efficiency; and through the rope splitting operation, multiple guide ropes can be respectively wound around the corresponding pulleys, which is convenient for the subsequent installation and arrangement of cables;

[0047] 2. The present invention calculates the construction load of the anchor rope required between any two adjacent pole towers, and can select the most suitable anchor rope according to factors such as different terrains and distances during actual use, thereby preventing the situation where the specifications of the selected anchor rope do not meet the construction load, and also avoiding the occurrence of construction situations such as inconvenience in subsequent board walking and pulley passing caused by the selected anchor rope having a thicker diameter. The present invention uses the anchor rope calculation formula to optimize the selection of anchor ropes of suitable specifications, so that during the cable installation process, construction personnel can conveniently operate the anchor rope to perform corresponding actions, thereby shortening the construction time of the entire cable installation;

[0048] 3. The present invention sets a walking board structure, and its specific structure is: the head and tail of the walking board are respectively fixed with a rotary connector and three rotary connectors, and the three rotary connectors are arranged in parallel, and a rotary connector is also set at the tail of the walking board and above the middle rotary connector. The present invention uses the setting of this walking board structure to distribute multiple traction ropes at intervals, which can help construction workers to split ropes faster in the subsequent process of the walking board passing the pulley, further shorten the time of rope splitting construction, and improve the construction efficiency of the entire cable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] Figure 1 It is a flow chart of distributed deployment of guide ropes in the prior art;

[0051] Figure 2 It is the tension field site layout diagram of the present invention;

[0052] Figure 3 It is a schematic diagram of the plank structure viewed from above in the present invention;

[0053] Figure 4 It is a schematic diagram of the front view structure of the walking board in the present invention;

[0054] Figure 5 It is a schematic diagram of the anchor rope connection structure of the present invention;

[0055] Figure 6 It is a schematic diagram of the rewinding operation structure of the present invention;

[0056] Figure 7 It is a schematic diagram of the rope splitting operation structure of the present invention;

[0057] Figure 8 It is a schematic diagram of the forward traction structure of the present invention;

[0058] Fig. 9 It is a schematic diagram of the installation construction of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0060] Embodiment 1:

[0061] like Figure 2-Figure 8As shown, a traction rope construction method for cable installation specifically includes the following steps:

[0062] Step 1: Construction preparation: Select suitable traction field, tension field, traction machine and tension machine, and select traction rope, anchor rope, etc. of appropriate specifications.

[0063] Step 2: Use a rotary wing drone to deploy the primary guide rope. Generally, a Φ3.5 Dyneema rope is selected as the primary guide rope. Specifically, use manpower to first pull out the remaining line of the Φ3.5 Dyneema rope, and then connect the front and rear Φ3.5 Dyneema ropes on the segmented tower. The joint uses a 30kN bend-resistant connector. After the entire line is connected, move the Φ3.5 Dyneema rope into the pulley of the pole tower.

[0064] Step 3: Connect the primary guide rope with the primary guide rope, and use the traction machine and the tension machine to pull the primary guide rope with low tension to move it. Generally, the primary guide rope uses a Φ6 Dyneema rope. Specifically, use a Φ3.5 Dyneema rope to pull the Φ6 Dyneema rope in a one-to-one manner. The traction adopts a tractor capstan low-tension traction, and the joint adopts a 30kN anti-bending connector.

[0065] Step 4: Connect the primary guide rope with the secondary guide rope, and use the traction machine and the tension machine to pull the secondary guide rope with low tension to move it. Generally, the secondary guide rope is Φ13 DuPont wire rope. Specifically: use Φ6 Dyneema rope to pull the Φ13 DuPont wire rope in a one-to-one manner, and use tractor capstan low-tension traction, and the joint uses a 30kN anti-bending connector.

[0066] Step 5: Connect the secondary guide rope to the traction rope, and use the traction machine and the tension machine to drive the traction rope with low tension. Generally, the traction rope here is selected as □13 anti-twist rope. Specifically: use Φ13 DuPont wire rope to pull the □13 anti-twist rope in a one-to-one manner. During the deployment process, the □13 anti-twist rope is deployed using a small tension machine, and the Φ13 DuPont wire rope is pulled using a small traction machine.

[0067] Step 6: Use the traction machine and the tension machine to drive the traction rope to the corresponding area in a positive direction with low tension;

[0068] Step 7: Add a walking board with a head and a tail, connect the traction rope to the rotary connector at the head of the walking board, and connect A parallel guide ropes to the rotary connector at the tail of the walking board;

[0069] Step 8: Use the traction machine and the tension machine to drive the walking plate forward with low tension to pass through the middle pulley of the pulley group on the tower. The pulley group has A pulleys. At this time, A guide ropes are all wound around the middle pulley;

[0070] Step 9: The construction workers use the A-1 anchor rope to temporarily anchor the A-1 guide ropes except the middle guide rope on the pole tower in turn, and drive the traction rope and the A guide rope to move in the opposite direction together until the A-1 anchor ropes are all in a taut state;

[0071] Step 10: Keep the A-1 anchor rope in a taut state, and continue to pull the middle guide rope in the reverse direction with the traction rope until the A-1 guide ropes are all in a loose state;

[0072] Step 11: Then release the connection between the A-1 guide ropes and the tail of the walking board, wind the A-1 guide ropes out from the middle pulley of the pulley group, and wind them on the other A-1 pulleys of the pulley group in sequence, and then connect the A-1 guide ropes to the rotary connectors at the tail of the walking board respectively;

[0073] Step 12: Finally, the traction rope is driven to move forward until one end of the A-1 anchor rope connected to the A-1 guide rope is in a slack state, at which time the connection between the A-1 anchor rope and the A-1 guide rope is released, and the rope splitting work is completed, so that the A guide ropes are respectively wound around the A pulleys on the pulley group;

[0074] Step 13: Connect the A cables to be installed in the corresponding area to the A guide ropes respectively and use the traction machine and tension machine to pull them to the designated position to complete the construction.

[0075] In the process of traction using the traction rope, that is, in the process of performing steps 6 to 13, the number of guide ropes is set to four (three □13 anti-twist ropes and one Φ13 DuPont wire rope), that is, when A=4, under this setting, two large tension machines and one small tension machine need to be arranged in the tension field, of which the two large tension machines provide tension for the three □13 anti-twist ropes, and the one small tension machine provides tension for the Φ13 DuPont wire rope. The on-site arrangement of the tension field is as follows Figure 2 As shown, in the figure: 101 represents a traction rope, 102 represents a walking board, 103 represents a □13 anti-twist rope, 104 represents a Φ13 DuPont wire rope, 105 represents a large tension machine, 106 represents a ground anchor, 107 represents a rope guide frame, and 108 represents a small tension machine. Steps 6 to 12 are described in detail as follows:

[0076] Step 6: Use the traction machine and the tension machine to drive the traction rope to the corresponding area in a positive direction with low tension;

[0077] Step 7: Add a walking board with a head and a tail, connect the traction rope to the rotary connector at the head of the walking board, and connect three □13 anti-twist ropes and a Φ13 DuPont wire rope to the rotary connector at the tail of the walking board. Specifically: first connect the traction rope to the rotary connector at the head of the walking board, and connect three parallel □13 anti-twist ropes and a Φ13 DuPont wire rope to the rotary connector at the tail of the walking board. The head and tail of this walking board are respectively fixed with a rotary connector and three rotary connectors, and the three rotary connectors are arranged in parallel. The rotary connector at the head is used for the connection of the traction rope, and the three rotary connectors at the tail are respectively used for the connection of the three □13 anti-twist ropes; a rotary connector for the connection of a Φ13 DuPont wire rope is provided at the tail of the walking board and above the middle rotary connector.

[0078] The specific structure of the board can be Figure 3 and Figure 4 The positional relationship between three □13 anti-twist ropes and one Φ13 DuPont wire rope can also be seen from the figure. In the figure: 101 represents the traction rope, 102 represents the walking board, 103 represents the □13 anti-twist rope, 202 represents the transition rope used to transfer the □13 anti-twist rope to the rotary connector, 201 represents the rotary connector on the walking board and the transition rope, and 104 represents the Φ13 DuPont wire rope. Figure 3 and Figure 4 It can be seen that two rotary connectors are arranged in the middle position of the tail of the walking board. The two rotary connectors there are in an up-and-down layout, and the Φ13 DuPont wire rope is connected to the rotary connector located at the upper position.

[0079] Step 8: Use the traction machine and the tension machine with low tension to drive the walking plate forward through the middle pulley of the pulley group on the tower. The pulley group has four pulleys. The layout of the four pulleys can be set by Figure 7 To show that at this time, three □13 anti-twist ropes and one Φ13 DuPont wire rope are all wound around the middle pulley. Specifically: when the walking board slowly passes through the middle pulley, reduce the traction speed until the walking board is 40 meters away from the middle pulley and stop traction. It should be noted that the distance over the pulley should not be too short, otherwise it will cause the subsequent Φ13 DuPont wire rope to be unable to reconnect with the walking board after being split to the corresponding position pulley, and the two □13 anti-twist ropes on both sides will jump when they are pulled again after being split to the corresponding position pulley.

[0080] Step 9: The construction workers use three anchor ropes to temporarily anchor the two □13 anti-twist ropes and one Φ13 DuPont wire rope on the pole tower in turn, and use the □13 anti-twist rope in the middle (the □13 anti-twist rope is connected to the rotating connector located at the middle position of the tail of the walking board) to cooperate with the traction rope to perform reverse traction and driving action until all three anchor ropes are in a taut state. Among them, the selection of anchor rope specifications is obtained through the anchor rope calculation formula, and the anchor rope calculation formula is used to optimize the selection of anchor ropes of appropriate specifications, so that in the subsequent cable installation process, the construction workers can conveniently operate the anchor rope to perform corresponding actions, shortening the construction time of the entire cable installation.

[0081] The anchor rope connection diagram can be obtained by Figure 5 In the figure, 101 represents a traction rope, 102 represents a walking board, 103 represents a □13 anti-twist rope, 104 represents a Φ13 DuPont wire rope, 204 represents a pulley, 205 represents a first cross arm, 206 represents a second cross arm, 301 represents an anchor rope, and 302 represents an extradition rope.

[0082] Step 10: Then, a □13 anti-twist rope that is not connected to the anchor rope and is located in the middle position is used together with the traction rope to continue to perform reverse traction and driving action until the two □13 anti-twist ropes and a Φ13 DuPont wire rope located on both sides are in a loose state.

[0083] The reverse traction operation diagram of this rewinding type can be represented by Figure 6 In the figure, 101 represents a traction rope, 102 represents a walking board, 103 represents a □13 anti-twist rope, 104 represents a Φ13 DuPont wire rope, 204 represents a pulley, 205 represents a first cross arm, 206 represents a second cross arm, 301 represents an anchor rope, and 302 represents an extradition rope.

[0084] Step 11: Then release the connection between the two □13 anti-twist ropes and one Φ13 DuPont wire rope on both sides and the tail of the walking board, wind the two □13 anti-twist ropes and one Φ13 DuPont wire rope out from the middle pulley of the pulley group, and wind them around the two pulleys on both sides of the pulley group and the upper pulley respectively, and then connect the two □13 anti-twist ropes and one Φ13 DuPont wire rope to the rotating connector at the tail of the walking board respectively.

[0085] This step is specifically:

[0086] (1) During step 10, when the walking board retreats to the preset position from the pulley, the rewinding operation is stopped, and a high-altitude construction worker uses a special tool to open the rotary connectors connecting the two □13 anti-twist ropes on both sides of the tail of the walking board, remove the two □13 anti-twist ropes and wind them out from the middle pulley, and then put them into the two pulleys on both sides respectively, and reconnect them to the rotary connectors on both sides of the tail of the walking board.

[0087] (2) After the two □13 anti-twist ropes are separated, another Φ13 DuPont wire rope is separated. Similarly, a high-altitude construction worker uses a special tool to open the rotary connector located in the middle of the tail of the walking board. The pulley located above is equipped with a transfer rope 302. The Φ13 DuPont wire rope is removed and wound out from the middle pulley. Then, the end of the Φ13 DuPont wire rope is connected to one end of the transfer rope 302 reserved in advance. The other end of the transfer rope is manually pulled. The Φ13 DuPont wire rope is wound around the upper pulley and then pulled to the walking board. The connection between the Φ13 DuPont wire rope and the transfer rope is released, and then the Φ13 DuPont wire rope is reconnected to the rotary connector located in the middle of the tail of the walking board. The rope separation step is completed. It should be noted that after the two □13 anti-twist ropes and one Φ13 DuPont wire rope are reconnected to the rotary connector at the tail of the walking board, traction begins. The traction speed should not be too fast, because at this time the angle between the two □13 anti-twist ropes on both sides of the tail of the walking board is very large, and if the speed is too fast, the rope will detach from the pulley.

[0088] The state after splitting can be obtained by Figure 7 The forward traction state after the rope is split can be expressed by Figure 8 In the figure, 101 represents a traction rope, 102 represents a walking board, 103 represents a □13 anti-twist rope, 104 represents a Φ13 DuPont wire rope, 203 represents a pole tower, 204 represents a pulley, 205 represents a first cross arm, 206 represents a second cross arm, 301 represents an anchor rope, and 302 represents an extradition rope.

[0089] Step 12: Finally, drive the traction rope to move forward until one end of the three anchor ropes connected to two □13 anti-twist ropes and one Φ13 DuPont wire rope is in a loose state, and then the high-altitude construction workers release the connection between the three anchor ropes and the two □13 anti-twist ropes and one Φ13 DuPont wire rope, thus completing the rope separation work, that is, the three □13 anti-twist ropes and one Φ13 DuPont wire rope are respectively wound around the four pulleys on the pulley group.

[0090] Step 13: Subsequently, the four cables to be installed in the corresponding area will be connected to three □13 anti-twist ropes and one Φ13 DuPont wire rope guide rope, and then pulled to the designated position using a traction machine and a tension machine to complete the construction.

[0091] Embodiment 2:

[0092] In the above process of using three anchor ropes to anchor two □13 anti-twist ropes and one Φ13 DuPont wire rope respectively, the anchor rope will be subjected to multiple pulling forces. It is necessary to ensure that the sum of the forces on the anchor rope is less than the threshold of its own strength in order to complete the rope splitting process normally. If you blindly and directly select an anchor rope with high strength (coarser diameter) to anchor the traction rope, the thicker diameter anchor rope will increase the overall mass of the anchor rope, and then the construction personnel will be inconvenient to buckle one end of the anchor rope to the pole tower, and the construction personnel are at high altitude, which will further limit the range of movement of the construction personnel, making the construction personnel's operation limited; at the same time, after the rope splitting is completed, when the subsequent anchor rope passes the pulley, if the thicker diameter anchor rope is compatible with the size of the pulley wheel groove, or the size difference between the two is not large, the anchor rope may be stuck on the pulley wheel groove and cannot pass, that is, the subsequent construction process will not be completed. Based on this, the following provides a reference for the selection of anchor rope specifications to optimize the selection of anchor ropes of appropriate specifications.

[0093] A method for calculating the specifications of an anchor rope is provided, which is used to calculate the specifications of the anchor rope, so as to be adapted to the above-mentioned traction rope construction method for cable erection. The specifications of the anchor rope are obtained by a calculation formula for the construction load it bears, which is as follows:

[0094] The entire traction erection state can be determined by Fig. 9 In the figure, 203 represents a pole tower, 401 represents a tension field, 402 represents a traction field, 403 represents an obstacle, and 404 represents a guide rope, wherein a plurality of pole towers are sequentially arranged between the tension field and the traction field. If any one of the pole towers is represented as the i-th pole tower, the pole towers adjacent to the i-th pole tower on the left and right are represented as the i-1-th pole tower and the i+1-th pole tower respectively.

[0095] After the walking board passes through the middle pulley of the pulley group on the i-th tower and the rope is divided, the guide rope is fully spread in the cable rack. The length of the guide rope can be calculated by the parabola method:

[0096]

[0097] Where, L i It is expressed as the length of the guide rope between the i-1th tower and the i-th tower line. It is expressed as the inclination angle of the line connecting the i-1th tower and the i-th tower wire suspension point (with the horizontal direction as the reference), l i It is represented by the distance between the i-1th tower and the i-th tower line, g is represented by the gravity load per unit length of the guide rope, F i It is expressed as the horizontal pay-out tension of the guide rope, which is provided by a tension field tension meter. Its specific value is calculated based on the minimum tension required for the guide rope of the spanning control gear in the pay-out gear to maintain a safe distance from the spanning object.

[0098] The above It is expressed as:

[0099]

[0100] In the formula, Δh i It is expressed as the height difference between the suspension point of the guide rope of the i-1th tower and the i-th tower, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

[0101] The F in the above i It is expressed as:

[0102]

[0103] Where: x represents the horizontal distance from the obstacle between the i-1th tower and the i-th tower to the hanging point on the traction side of the i-th tower, m represents the distance from the hanging point on the traction side of the i-th tower to the ground, y represents the clearance distance from the obstacle between the i-1th tower and the i-th tower to the guide rope, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

[0104] Some parameters in the above formula are Fig. 9 Marked in.

[0105] According to the above analysis, the construction load T borne by the anchor rope between the i-1th tower and the i-th tower is i :

[0106] T i =L i ×g;

[0107] Where, L i It is expressed as the length of the guide rope between the i-1th tower and the i-th tower line, and g is expressed as the gravity load per unit length of the guide rope.

[0108] The present invention calculates the construction load of the anchor rope required between any two adjacent pole towers, and can select the most suitable anchor rope according to factors such as different terrains and distances during actual use, thereby preventing the situation where the specifications of the selected anchor rope do not meet the construction load, and also avoiding the occurrence of construction situations such as inconvenience in subsequent board walking and pulley passing due to the selected anchor rope having a thicker diameter.

[0109] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A traction rope construction method for cable installation, characterized in that: The steps include: Step 1: Use a traction machine and a tension machine with low tension to drive the traction rope forward to the corresponding area; Step 2: Add a walking board with a head and a tail, connect the traction rope to the rotary connector at the head of the walking board, and connect A parallel guide ropes to the rotary connector at the tail of the walking board; Step 3: Use the traction machine and the tension machine to drive the walking plate forward through the middle pulley of the pulley group on the tower with low tension. The pulley group has A pulleys. At this time, A guide ropes including the middle guide rope are all wound around the middle pulley; Step 4: The construction personnel use the A-1 anchor rope to temporarily anchor the A-1 guide ropes except the middle guide rope on the pole tower in turn, and drive the traction rope and the A guide rope to move in the opposite direction together until the A-1 anchor ropes are all in a taut state; Step 5: Keep the A-1 anchor rope in a taut state, and continue to pull the middle guide rope in the reverse direction with the traction rope until the A-1 guide ropes are all in a loose state; Step 6: Then release the connection between the A-1 guide ropes and the tail of the walking board, wind the A-1 guide ropes out from the middle pulley of the pulley group, and wind them on the other A-1 pulleys of the pulley group in sequence, and then connect the A-1 guide ropes to the rotary connectors at the tail of the walking board respectively; Step 7: Finally, the traction rope is driven to move forward until the end of the A-1 anchor rope connected to the A-1 guide rope is in a loose state, and then the connection between the A-1 anchor rope and the A-1 guide rope is released, that is, the rope separation work is completed, so that the A guide ropes are respectively wound around the A pulleys on the pulley group; Step 8: Subsequently, the A cables to be erected in the corresponding area are connected to the A guide ropes respectively and pulled to the designated position by a traction machine and a tension machine to complete the construction.

2. A traction rope construction method for cable installation according to claim 1, characterized in that: The guide ropes are arranged in four numbers, and a rotary connector and three rotary connectors are fixedly arranged at the head and the tail of the walking board respectively, and the three rotary connectors are arranged in parallel. The rotary connector at the head is used for connecting the traction rope, and the three rotary connectors at the tail are used for connecting the three guide ropes respectively; a rotary connector for connecting the remaining guide rope is arranged at the tail of the walking board and above the middle rotary connector.

3. A traction rope construction method for cable installation according to claim 2, characterized in that: The pulley group consists of four groups of pulleys, three groups of pulleys are horizontally arranged in parallel on the first cross arm of the pole tower, and the remaining group of pulleys is arranged on the second cross arm of the pole tower, and the pulley is located above the three groups of pulleys.

4. A traction rope construction method for cable installation according to claim 1, characterized in that: Before performing step 1, the following preliminary preparation steps are also included: S1: Use drone to deploy primary guide rope; S2: Connect the primary guide rope to the primary guide rope, and use the traction machine and tension machine to pull the primary guide rope with low tension; S3: Connect the primary guide rope with the secondary guide rope, and use the traction machine and the tension machine to pull the secondary guide rope with low tension; S4: Connect the secondary guide rope to the traction rope, and use the traction machine and tension machine to drive the traction rope with low tension.

5. A method for calculating anchor rope specifications, characterized in that: Used to calculate the specifications of the anchor rope, so as to be adapted for use in a traction rope construction method for cable erection as described in any one of claims 1 to 4, wherein the specifications of the anchor rope are obtained by a calculation formula for the construction load to be borne; Construction load T borne by anchor rope i The calculation formula is as follows: T i =L i ×g; Where: T i It is expressed as the construction load borne by the anchor rope between the i-1th tower and the i-th tower, L i It is expressed as the length of the guide rope between the i-1th tower and the i-th tower line, and g is expressed as the gravity load per unit length of the guide rope.

6. A method for calculating anchor rope specifications according to claim 5, characterized in that: The guide rope length L in the above formula is i The calculation formula is as follows: Where: It is expressed as the inclination angle of the line connecting the i-1th tower and the i-th tower wire suspension point, l i It is represented by the distance between the i-1th tower and the i-th tower line, g is represented by the gravity load per unit length of the guide rope, F i Expressed as the horizontal pay-out tension of the guide rope.

7. A method for calculating anchor rope specifications according to claim 6, characterized in that: The tilt angle in the above formula is The calculation formula is as follows: Where: Δh i It is expressed as the height difference between the suspension point of the guide rope of the i-1th tower and the i-th tower, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

8. A method for calculating anchor rope specifications according to claim 7, characterized in that: Horizontal pay-off tension of guide rope F i The calculation formula is as follows: Where: x represents the horizontal distance from the obstacle between the i-1th tower and the i-th tower to the hanging point on the traction side of the i-th tower, m represents the distance from the hanging point on the traction side of the i-th tower to the ground, y represents the clearance distance from the obstacle between the i-1th tower and the i-th tower to the guide rope, l i It is expressed as the distance between the i-1th tower and the i-th tower line.

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