Auxiliary tool for erecting catenary carrier cable

Abstract

The utility model relates to the technical field of railway catenary erection, and discloses a catenary carrier cable erection auxiliary tool which comprises a hoop used for being connected with a flat cantilever of a catenary in a clamped mode, an inverted L-shaped supporting arm fixedly connected to the top of the hoop and a pulley assembly hung on the supporting arm. The pulley assembly is positioned obliquely above a carrier cable seat on the flat cantilever; the pulley assembly comprises a wheel frame, a hook fixedly connected to the top of the wheel frame and a pulley rotationally connected to the lower portion of the inner side of the wheel frame, a notch is formed in the wheel frame, the pulley is lower than the notch, the carrier cable is erected on the pulley, and the hook is hung on the top of the supporting arm. When being used for mounting the carrier cable, the carrier cable does not need to bypass the end part of the flat cantilever from the lower part of the flat cantilever and then is mounted on the carrier cable seat, so that the moving distance of the carrier cable during mounting can be greatly shortened, and the carrier cable is more convenient and more labor-saving to mount.

Description

Technical Field

[0001] This utility model relates to the field of railway catenary erection technology, specifically to an auxiliary tool for erecting catenary support cables. Background Technology

[0002] The installation of the catenary cable is a crucial step in the construction of the overhead contact system. The catenary cable is installed on a catenary cable seat, which is fixed to the trestle arm. The contact wire of the overhead contact system is suspended below the catenary cable via a guy wire. Traditionally, catenary cable installation methods typically involve suspending pulleys at positions corresponding to the catenary cable seats under each trestle arm, then passing the catenary cable sequentially through each pulley, and finally detaching the catenary cable from the pulleys and installing it onto the catenary cable seat. However, this traditional method has several problems and shortcomings:

[0003] Because the pulley is installed below the cantilever arm, after the catenary cable detaches from the pulley, it needs to be routed around the end of the catenary cable and then flipped over to the top of the cantilever arm before it can be installed onto the catenary cable seat. Therefore, during installation, the tension in the catenary cable is very high, and due to the long stroke, the tension changes significantly. Routeing the catenary cable around the end of the cantilever arm is extremely difficult and inconvenient, increasing labor intensity and construction difficulty.

[0004] In addition, because the contact wire is laid in a zigzag pattern, the catenary cable will also be laid in a similar pattern. Figure 6 The diagram shows a zigzag pattern. Pulleys are typically made of wire tied to a flat arm. Therefore, when the catenary cable passes through each pulley sequentially during release, it easily rubs against the wire or the pulley frame, causing scratches on the surface of the catenary cable and affecting its mechanical properties and service life.

[0005] In addition, sometimes there are other support components below the flat bracket arm, besides the inclined bracket arm, which occupy the installation position of the pulley. This makes it impossible to install the pulley or requires the pulley to be installed in a position further away from the end of the flat bracket arm, thus further increasing the difficulty of installing the catenary cable.

[0006] Patent CN217415538U discloses an installation tool for the catenary cable of a contact network, including a rotation adjustment mechanism and a tension adjustment mechanism. The rotation adjustment mechanism can be fixed to a cantilever arm device, which supports the catenary cable of the contact network. The rotation adjustment mechanism includes a worm gear and a worm shaft that mesh with each other. The tension adjustment mechanism includes a threaded screw and a screw nut. The screw nut is fixed relative to the worm gear and rotates synchronously with the worm gear. The end of the screw can be connected to the catenary cable and drive the catenary cable away from or towards the screw nut. Although it can replace the traditional manual pulling of the catenary cable, the catenary cable still needs to be routed from below the cantilever arm, around the end, to the catenary cable seat on the cantilever arm. Therefore, the movement path of the catenary cable remains unchanged, the tension force on the catenary cable is large, and the installation tool has a complex structure. In addition, since the catenary is clamped between the cable holder and the cable stop, when the screw of the installation tool rotates, the cable holder and the cable stop will not only cause friction on the catenary, but also cause the catenary to be subjected to large local stress due to deformation, thereby reducing the mechanical properties of the catenary. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an auxiliary tool for the installation of catenary cables with a simple structure, in order to solve the problem that the installation of catenary cables currently requires them to pass under the flat cantilever arm and around the end of the flat cantilever arm, which leads to high labor intensity.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] An auxiliary tool for erecting catenary cables includes a clamp for engaging with a cantilever arm of the catenary, a U-shaped support arm fixedly connected to the top of the clamp, and a pulley assembly suspended on the support arm. After the clamp is connected to the cantilever arm, the pulley assembly is located diagonally above the catenary cable seat on the cantilever arm. The pulley assembly includes a wheel frame, a hook fixedly connected to the top of the wheel frame, and a pulley rotatably connected to the lower inner side of the wheel frame. The wheel frame has a notch, the pulley is lower than the notch, the catenary cable is supported on the pulley, and the hook is hung on the top of the support arm.

[0010] Furthermore, the clamp includes an upper first clamp and a lower second clamp, both of which are semi-circular. The first clamp and the second clamp are fastened together, with one end of the first clamp and the corresponding end of the second clamp hinged together. The top of the first clamp is fixedly connected to the bottom of the support arm, and a tensioning device is provided between the first clamp and the second clamp for clamping the first clamp and the second clamp onto the flat wrist arm.

[0011] Furthermore, the other end of the first clamp is a first flange, and the other end of the second clamp is a second flange. The tensioning device includes a U-shaped pull frame rotatably connected to the first flange. The back of the second flange has a groove, and a pull bar fixedly connected to the pull frame is provided below the groove. A locking screw is threaded through the pull bar. After the first clamp and the second clamp clamp the flat arm, the locking screw abuts against the bottom of the groove.

[0012] Furthermore, the wheel rim is provided with an elastic baffle at the notch. The baffle is vertically arranged, with its top end fixedly connected to the wheel rim and its bottom end elastically abutting against the lower edge of the notch.

[0013] Furthermore, the support arm includes a lower column and a U-shaped cantilever at the top of the column. The pulley assembly is attached to the part of the cantilever away from the column. The bottom of the column is fixedly connected to a clamp, and the top of the column is slidably connected to the cantilever. A drive device for moving the cantilever closer to or away from the column is rotatably connected to the cantilever.

[0014] Furthermore, the driving device is a lead screw arranged along the length of the column, with one end of the lead screw threadedly connected to the column and the other end rotatably connected to the cantilever.

[0015] Furthermore, the end of the lead screw away from the column is a hexagonal connector that matches the socket of the electric wrench.

[0016] The positive effects of this utility model are:

[0017] This utility model has a simple structure, comprising a clamp, a support arm, and a pulley assembly. The pulley assembly is located above the flat arm and diagonally above the load-bearing cable seat, very close to the installation position of the load-bearing cable on the load-bearing cable seat. During installation, the load-bearing cable does not need to pass under the flat arm, around its end, and then be installed onto the load-bearing cable seat, thus significantly shortening the movement distance of the load-bearing cable during installation, making installation more convenient and labor-saving. During installation, the load-bearing cable does not require clamping and remains in constant contact with the pulley, preventing wear and reducing stress between the cable and pulley, thus preventing a decrease in the mechanical properties of the load-bearing cable. Furthermore, the pulley assembly can tilt under the tension of the load-bearing cable, ensuring that the load-bearing cable always moves under the constraint of the pulley assembly, preventing the cable from slipping out of the pulley and rubbing against the pulley frame, which would damage the cable and reduce its mechanical strength. Attached Figure Description

[0018] Figure 1 These are perspective views of Examples 1 and 2;

[0019] Figure 2It is a 3D view of the pulley assembly;

[0020] Figure 3 This is a diagram illustrating the use of this utility model;

[0021] Figure 4 yes Figure 3 A magnified view of a section of the central I area;

[0022] Figure 5 This is a schematic diagram of the support arm in Embodiment 3;

[0023] Figure 6 This is a top view after the catenary cables have been laid;

[0024] In the picture:

[0025] 1. Locking screw; 2. Pull bar; 3. Second flange; 4. Pull frame; 5. First flange; 6. First clamp; 7. Support arm; 8. Hanging ring; 9. Pulley assembly; 10. Second clamp; 11. Wheel frame; 12. Pulley; 13. Hook; 14. Baffle; 15. Flat bracket arm; 16. Angled bracket arm; 17. Cable support seat; 18. Cable support cable; 19. Column; 20. Cantilever; 21. Lead screw; 22. Pressure cap; 23. Turntable; 24. Connector. Detailed Implementation

[0026] like Figure 3 and 4 As shown, a catenary support 17 is installed near the right end of the flat catenary 15, and a slanted catenary 16 supports the lower part of the flat catenary 15. After installation, the catenary 18 needs to be clamped onto the clamp plate at the top of the catenary support 17.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, an auxiliary tool for a catenary cable assembly includes a clamp, a U-shaped support arm 7 fixedly connected to the top of the clamp, and a pulley assembly 9 suspended on the support arm 7. The pulley assembly 9 includes a rectangular frame 11, a hook 13 fixedly connected to the top of the frame 11, and a pulley 12 rotatably connected to the lower inner side of the frame 11. A notch is provided on the upper right side of the frame 11, and the pulley 12 is below the notch. An elastic baffle 14 is provided at the notch on the frame 11. The baffle 14 is made of spring steel, with a material grade of 65Mn. The baffle 14 is vertically arranged, with its top end fixedly connected to the frame 11, and its lower end elastically abutting against the inner side of the lower edge of the notch, thereby closing the notch.

[0029] A hanging ring 8 is fixedly connected to the top of the support arm 7 near the right end. A hook 13 is hung on the hanging ring 8. The hook 13 is equipped with an elastic anti-detachment baffle to prevent the hook 13 from detaching from the hanging ring 8 when it shakes.

[0030] Combination Figure 3 and Figure 4 As shown, in use, the clamp is held tightly to the right end of the flat arm 15, so that the pulley 12 is located above and to the left of the load-bearing cable seat 17, and the load-bearing cable 18 is mounted on the pulley 12. The pulley 12 is located at one of the left inflection points of the zigzag load-bearing cable 18. Therefore, when the load-bearing cable 18 is laid out, while moving along the pulley 12, it also applies a rightward pulling force to the pulley 12, causing the lower part of the wheel frame 11 to tilt to the right. This ensures that the load-bearing cable 18 always moves under the constraint of the pulley 12, preventing the load-bearing cable 18 from coming off the pulley 12 and rubbing against the wheel frame 11, which would damage the load-bearing cable 18 and reduce its mechanical strength.

[0031] After the catenary cable 18 is laid out, unscrew the clamp plate at the top of the catenary cable seat 17, then press the baffle plate 14 to allow the catenary cable 18 to pass through the notch and be placed on the top of the catenary cable seat 17. The catenary cable 18 is then clamped by the clamp plate, thus completing the installation of the catenary cable 18.

[0032] Therefore, since the pulley assembly 9 is located above the flat cantilever arm 15 and is very close to the installation position of the load-bearing cable 18 on the load-bearing cable seat 17, when installing the load-bearing cable 18, the load-bearing cable 18 does not need to go under the flat cantilever arm 18, pass around the end of the flat cantilever arm 18, and then be installed on the load-bearing cable seat 17. This can greatly shorten the moving distance of the load-bearing cable 18, making the installation of the load-bearing cable 18 more convenient and less strenuous.

[0033] Example 2

[0034] like Figure 1 As shown, the difference between this embodiment and Embodiment 1 is that:

[0035] The clamps include an upper first clamp 6 and a lower second clamp 10. Both the first clamp 6 and the second clamp 10 are semi-circular and are fastened together. The rear ends of the first clamp 6 and the second clamp 10 are hinged together. The top of the first clamp 6 is fixedly connected to the bottom of the support arm 7. A tensioning device is provided between the first clamp 6 and the second clamp 10 to clamp the first clamp 6 and the second clamp 10 onto the flat wrist arm 15.

[0036] The front end of the first clamp 6 is a first flange 5, and the front end of the second clamp 10 is a second flange 3. The tensioning device includes a U-shaped pull frame 4 rotatably connected to the first flange 5. The back (i.e., bottom) of the second flange 3 has a groove, and a rectangular pull bar 2 fixedly connected to the bottom of the pull frame 4 is provided below the groove. A vertical locking screw 1 is threaded through the middle of the pull bar 2.

[0037] Flip the lower part of the pull frame 4 upwards, then place the first clamp 6 and the second clamp 10 on the flat arm 15, then flip the pull frame 4 down and tighten the locking screw 1 so that the locking screw 1 abuts against the bottom of the groove, thereby clamping the flat arm 15 between the first clamp 6 and the second clamp 10.

[0038] Similarly, after loosening the locking screw 1, the pull frame 4 can be flipped up, allowing the present invention to be quickly removed from the flat bracket 15. Therefore, the present invention can achieve quick connection and separation from the flat bracket 15, thereby improving the installation efficiency of the load-bearing cable 18.

[0039] Example 3

[0040] Combination Figure 5 As shown, the difference between this embodiment and Embodiment 2 is that:

[0041] The support arm 7 includes a lower rectangular column 19 and a U-shaped cantilever 20 at the top of the column 19. The cantilever 20 also has a rectangular cross-section. The pulley assembly 9 is attached to the right side of the cantilever 20. The bottom of the column 19 is fixedly connected to the top of the first clamp 6. The top of the column 19 is a rectangular slider. The bottom left side of the cantilever 20 has a rectangular sliding hole for sliding cooperation with the slider, thereby realizing a sliding connection between the column 19 and the cantilever 20. A drive device for moving the cantilever 20 closer to or away from the column 19 is rotatably connected to the cantilever 20.

[0042] The driving device is a lead screw 21 arranged along the length of the column 19. The lower part of the lead screw 21 is threaded to the column 19, and the lead screw 21 passes through a corresponding hole on the cantilever 20, with a clearance fit between the lead screw 21 and the hole. Near the top of the lead screw 21 is an annular turntable 23. A pressure cap 22 is fixedly connected to the top of the cantilever 21. The turntable 23 is disposed between the pressure cap 22 and the cantilever 20. The pressure cap 22 is used to axially limit the lead screw 21 to prevent axial movement during rotation, thereby realizing the rotational connection between the upper end of the lead screw 21 and the cantilever 20.

[0043] The top of the lead screw 21 is a hexagonal connector 24, which matches the socket of the electric wrench.

[0044] In this embodiment, when the present invention is connected to the flat arm 15 through the first clamp 6 and the second clamp 10, the cantilever 20 is tilted slightly forward, so that the installation positions of the load-bearing cable on the pulley 12 and the load-bearing cable seat 17 are staggered along the circumferential direction of the flat arm 15. At the same time, after the load-bearing cable 18 passes through the pulley 12, the load-bearing cable 18 passes directly above the load-bearing cable seat 17.

[0045] After the catenary cable 18 is laid out, open the clamp plate at the top of the catenary cable seat 17, and turn the screw 21 with an electric wrench to gradually move the catenary cable 18 into the catenary cable installation position on the catenary cable seat 17. Then, clamp the catenary cable 18 with the clamp plate to complete the installation of the catenary cable 18, making the installation of the catenary cable 18 more labor-saving and convenient.

[0046] After the catenary cable 18 is installed in place, remove the hook 13 from the hanging ring 8 and press the stop plate 14 to detach the catenary cable 18 from the wheel frame 11.

[0047] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present utility model. They are only used to illustrate the technical ideas and features of the present utility model, with the aim of enabling those skilled in the art to understand the content of the present utility model and implement it accordingly. However, they are not limited to the present utility model, and the patent scope of the present utility model cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed in the present utility model, without departing from the structure of the present utility model, such as local improvements within the system and modifications or transformations between subsystems, are still within the patent scope of the present utility model.

Claims

1. An auxiliary tool for erecting catenary cables, characterized in that, It includes a clamp for engaging with the flat cantilever arm (15) of the contact wire, a U-shaped support arm (7) fixedly connected to the top of the clamp, and a pulley assembly (9) suspended on the support arm (7). After the clamp is connected to the flat cantilever arm (15), the pulley assembly (9) is located diagonally above the load-bearing cable seat (17) on the flat cantilever arm (15). The pulley assembly (9) includes a wheel frame (11), a hook (13) fixedly connected to the top of the wheel frame (11), and a pulley (12) rotatably connected to the lower inner side of the wheel frame (11). The wheel frame (11) has a notch, the pulley (12) is lower than the notch, the load-bearing cable (18) is mounted on the pulley (12), and the hook (13) is hung on the top of the support arm (7).

2. The auxiliary tool for erecting catenary cables according to claim 1, characterized in that, The clamps include an upper first clamp (6) and a lower second clamp (10). Both the first clamp (6) and the second clamp (10) are semi-circular. The first clamp (6) and the second clamp (10) are fastened together. One end of the first clamp (6) and the corresponding end of the second clamp (10) are hinged. The top of the first clamp (6) is fixedly connected to the bottom of the support arm (7). A tensioning device is provided between the first clamp (6) and the second clamp (10) for clamping the first clamp (6) and the second clamp (10) on the flat wrist arm (15).

3. The auxiliary tool for erecting catenary cables according to claim 2, characterized in that, The other end of the first clamp (6) is the first flange (5), and the other end of the second clamp (10) is the second flange (3). The tensioning device includes a door-shaped pull frame (4) rotatably connected to the first flange (5). The back of the second flange (3) has a groove, and a pull strip (2) fixedly connected to the pull frame (4) is provided below the groove. A locking screw (1) is threaded through the pull strip (2). After the first clamp (6) and the second clamp (10) clamp the flat arm (15), the locking screw (1) abuts against the bottom of the groove.

4. The auxiliary tool for erecting catenary cables according to claim 1, characterized in that, The wheel frame (11) has an elastic baffle (14) at the notch. The baffle (14) is vertically arranged. The top of the baffle (14) is fixedly connected to the wheel frame (11), and the bottom of the baffle (14) is elastically pressed against the lower edge of the notch.

5. The auxiliary tool for erecting catenary cables according to claim 1, characterized in that, The support arm (7) includes a lower column (19) and a U-shaped cantilever (20) at the top of the column (19). The pulley assembly (9) is attached to the part of the cantilever (20) away from the column (19). The bottom of the column (19) is fixedly connected to a clamp. The top of the column (19) is slidably connected to the cantilever (20). A drive device for moving the cantilever (20) closer to or away from the column (19) is rotatably connected to the cantilever (20).

6. The auxiliary tool for erecting catenary cables according to claim 5, characterized in that, The driving device is a lead screw (21) arranged along the length of the column (19). One end of the lead screw (21) is threadedly connected to the column (19), and the other end is rotatably connected to the cantilever (20).

7. The auxiliary tool for erecting catenary cables according to claim 6, characterized in that, The end of the lead screw (21) away from the column (19) is a hexagonal connector (24), which matches the socket of the electric wrench.

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