Transition device for railway bridge cable and construction method

Abstract

The invention relates to a transition device for railroad bridge cables and a construction method.According to the transition device, an existing cable trough is disconnected on the front side and the rear side of an existing bridge, a transition cable trough is fixedly installed on one side of an adjacent bridge, and migration troughs are fixedly installed between the two ends of the transition cable trough and the existing cable trough; transferring the electric service professional cable into the transition cable trough through the migration trough; a plurality of cable fixing devices are fixedly arranged on a power supply professional cable at intervals, the cable fixing devices located on the two sides of an existing bridge are hoisted through hoisting equipment, and then the existing bridge can be replaced. Through cooperation of the migration groove, the transition cable groove and the cable fixing device, transition of various cables can be completed on the bridge pier, the cables do not need to be lowered to the ground, the disturbance risk possibly borne by the cables after the cables fall to the original ground is effectively avoided, the stability of a railway line is fundamentally enhanced, and therefore the running safety of a train is powerfully guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of railway bridge replacement construction technology, and relates to the power supply of railway bridges, especially a transition device and construction method for railway bridge cables. Background Technology

[0002] The bridge replacement construction involves cable transition work. The cables include electrical cables, installed in cable trenches on both sides of the railway; and power supply cables, installed on the overhead contact line poles on one side of the railway. Traditional cable transition work requires removing excess length from the electrical cables and disconnecting the power supply cables, replacing them with longer ones, and lowering both cables to the ground, securing them with supports, and assigning personnel to monitor them. After the bridge replacement is completed, the electrical and power supply cables are moved back to their original positions. However, this construction method has the following problems:

[0003] 1. In order to achieve the transition, the electrical and power supply cables are installed in longer lengths and require more supports. This causes some cable transition paths to exceed the construction boundary, which significantly increases the difficulty of safety protection, inspection and maintenance, and external coordination for cables outside the boundary, resulting in high management and construction costs.

[0004] 2. When encountering situations where it is necessary to cross existing highways or waterways, cable supports lack stable installation conditions, making installation difficult;

[0005] 3. Once the cable is laid to the ground, it is susceptible to direct interference from on-site construction activities, which can easily lead to cable failures and adversely affect the safety and stability of train operation, posing a risk of disrupting the normal operation of the railway. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transition device and construction method for railway bridge cables that is stable and low in cost.

[0007] To solve the above problems, the technical solution of the present invention is as follows:

[0008] A transition device for railway bridge cables, comprising: existing bridge and adjacent bridges fixedly mounted on several piers, the existing bridge and adjacent bridges being arranged side-by-side at intervals; existing cable troughs fixedly mounted on the front and rear sides of the existing bridge; and contact wire posts mounted on the piers at both ends of the existing bridge; including:

[0009] The transition cable trough is installed along the adjacent bridge and fixed to the piers of the adjacent bridge.

[0010] A pair of migration troughs are respectively fixedly connected between the two ends of the existing cable trough and the transition cable trough, and are both fixedly installed on the corresponding bridge piers. The first cable is installed in the existing cable trough, the transition cable trough and the migration trough.

[0011] Several hoisting devices are fixedly installed on the bridge piers at intervals. A traction device is fixedly installed at one end of the hoisting device, and a first lifting device is fixedly installed at the other end of the hoisting device. The first lifting device is located above the transfer trough, and a second lifting device is fixedly installed on the transfer trough.

[0012] When hoisting the transfer trough, the traction device drives the second lifting device to move upward and engage with the first lifting device;

[0013] The second cable is fixed to the contact wire post. A cable fixing device is fixed to the second cable. The cable fixing device is lifted by a lifting and hoisting equipment and is suitable for supporting the second cable above the existing bridge.

[0014] In a further embodiment, the migration trough includes a pair of vertical troughs and a horizontal trough, with the two ends of the horizontal trough vertically mounted on the vertical troughs respectively. One vertical trough is fixed to the existing cable trough, and the other vertical trough is fixed to the transition cable trough.

[0015] A second lifting device is fixedly installed on the horizontal groove.

[0016] In a further embodiment, the hoisting device includes a pair of uprights and a crossbar, with the fixed end of the crossbar fixed to the pier via the pair of uprights, and the cantilever end of the crossbar extending above the migration trough.

[0017] The traction device includes a rope shaft and a connecting rope. The rope shaft is rotatably mounted on the top of the crossbar, and the connecting rope is wound inside the rope shaft.

[0018] A first lifting device is fixed to the bottom end of the crossbar cantilever, and a connecting rope passes through the first lifting device to connect to a second lifting device.

[0019] In a further embodiment, the first lifting device includes a pair of vertical plates, a pair of movable plates, a pair of first mounting plates, a pair of baffles, and two pairs of limiting rods. The pair of vertical plates are fixedly mounted on the horizontal bar at intervals. The bottom ends of the pair of vertical plates are vertically provided with inwardly turned second mounting plates. The pair of movable plates are respectively hinged on the pair of vertical plates, and the movable plates are symmetrically positioned on the second mounting plates.

[0020] The first mounting plate is horizontally and symmetrically fixed on the inner side of the upper part of the pair of vertical plates;

[0021] A pair of first mounting plates are vertically movable through the baffles. Each first mounting plate is hinged with a pair of limiting rods, which are respectively located on both sides of the baffle. Grooves are formed on the middle edge of both sides of the baffle.

[0022] When each pair of limit rods is set in parallel, the limit rods are engaged in the grooves of the baffle; when each pair of limit rods is rotated and set in opposite directions, the baffle moves downward so that its top end contacts the limit rod.

[0023] In a further embodiment, the second lifting device includes a base plate, a connecting plate, a pair of wing plates, a top plate, a pair of wedge blocks, and a lifting ring. The base plate is fixedly mounted on the top end of the migration groove, the connecting plate is vertically mounted on the base plate, the pair of wing plates are symmetrically fixedly mounted on both sides of the connecting plate, and the top plate is fixedly mounted on the top end of the connecting plate.

[0024] A lifting ring is fixed in the middle of the top plate. The lifting ring is suitable for installing a connecting rope. A pair of wedge blocks are fixed at the top of the top plate outside the lifting ring. The pair of wedge blocks move upward and drive two pairs of limit rods to rotate in opposite directions along the hinge axis.

[0025] In a further embodiment, the transition cable trough is fixed to the additional structure of the pier by a fixing device, which includes an upper plate, a lower plate and a pair of adjusting vertical rods. The upper plate, the lower plate and the pair of adjusting vertical rods form a rectangular structure, and the transition cable trough is located between the rectangular structures.

[0026] The upper plate has a long strip-shaped upper adjustment hole, and the lower plate has two lower adjustment holes spaced apart. The top ends of a pair of adjustment rods are inserted into the upper adjustment holes, and the bottom ends of a pair of adjustment rods are inserted into the two lower adjustment holes respectively.

[0027] One of the lower adjustment holes is a semi-open structure, and a pair of adjustment rods have a nut threaded onto the bottom end.

[0028] In a further embodiment, the cable fixing device includes a lower cable fixing plate, an upper cable fixing plate, and a cable lifting ring. The upper cable fixing plate is fixedly mounted on the lower cable fixing plate, and the upper cable fixing plate is fixedly mounted on the upper cable fixing plate. The lower cable fixing plate has several slots spaced along its edge, which are suitable for being fastened to the contact wire column.

[0029] The upper and lower cable fixing plates are each made with corresponding semi-circular structures. The upper and lower cable fixing plates are fastened together to form a tubular structure, and the second cable is inserted into the tubular structure.

[0030] A method for transitioning railway bridge cables, using a transition device for railway bridge cables, includes the following steps:

[0031] The existing cable trough is disconnected, a transition cable trough is fixed at the adjacent bridge, and the relocation trough is hoisted by a hoisting device to connect the existing cable trough, the relocation trough and the transition cable trough.

[0032] The first cable is laid in the existing cable trough, migration trough and transition cable trough to complete the transition of communication, signal and power cables;

[0033] Install several cable fixing devices at intervals on the second cable, tighten the second cable to the contact wire post, and fix the cable fixing devices on the contact wire post.

[0034] Remove the fixing points of the second cable to the existing bridge, use lifting equipment to lift the cable fixing devices located on both sides of the existing bridge, raise the second cable at the existing bridge, and complete the transition of the positive feeder, protective line and overhead ground wire.

[0035] Replace the existing bridge.

[0036] In a further embodiment, after replacing the existing bridge, the existing cable trough is connected, the migration trough and the transition cable trough are removed, and the first cable is moved back into the existing cable trough.

[0037] Remove the cable fixing device, lower the second cable, and connect the second cable to the replaced bridge.

[0038] In a further embodiment, when hoisting the migration trough, the connecting rope is tightened, the second lifting device moves upward, the wedge block drives a pair of movable plates to flip upward and then fall, the connecting rope is loosened, the top plate falls and is clamped onto the pair of movable plates, which is suitable for fixing the migration trough.

[0039] When the transfer trough is released from hoisting, the connecting rope is tightened, the second lifting device moves upward, a pair of wing plates drive a pair of movable plates to flip upward, the wedge block drives the limit rod to rotate, so that the limit rod disengages from the baffle, the baffle falls down to block the movable plate, which is suitable for moving the second lifting device out of the first lifting device.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] 1. This transition device disconnects the existing cable troughs on both the front and rear sides of the existing bridge. A transition cable trough is fixed on one side of the adjacent bridge. Migration troughs are fixed between the two ends of the transition cable trough and the existing cable trough, allowing electrical cables to be transferred to the transition cable trough via the migration troughs. Several cable fixing devices are fixed at intervals on the power supply cables. The cable fixing devices located on both sides of the existing bridge are lifted by lifting equipment, allowing the existing bridge to be replaced. Through the cooperation of the migration troughs, transition cable troughs, and cable fixing devices, the transition of various cables can be completed on the bridge piers without lowering them to the ground. This effectively avoids the disturbance risks that cables might experience after falling to the original ground, fundamentally enhancing the stability of the railway line and thus strongly ensuring the safe operation of trains.

[0042] 2. This transition device consists of a hoisting apparatus fixed to the pier cap of the bridge pier. A first lifting device is fixed to one end of the hoisting apparatus, and a second lifting device is fixed to the transfer trough. The first lifting device is connected to the second lifting device via a connecting rope. During hoisting, the connecting rope is tightened until the second lifting device is engaged within the first lifting device, thus securing the transfer trough. To release the hoisting, the connecting rope is tightened again and then released, allowing the second lifting device to easily detach from the first lifting device. The hoisting apparatus has a simple structure and occupies little space. It can be used when the clearance space under the bridge is insufficient or hoisting conditions cannot be met. Furthermore, the connection structure between the first and second lifting devices is ingenious, making it convenient and quick to use. Only one operator is required, saving labor costs and facilitating process management.

[0043] 3. This transition construction method can significantly reduce material costs and steel consumption. Compared with conventional methods that require a 2km to 3km transition section for the three-electric cables, positive feeder, protective conductor, and overhead ground wire, consuming an average of about 10 tons of steel per kilometer (total steel consumption of 20 to 30 tons), the method used in this invention can drastically reduce steel consumption to about 5 tons. Based on this calculation, it can save approximately 75,000 to 125,000 yuan in project costs, and the cost savings further increase with the increase of the transition distance, resulting in significant economic benefits.

[0044] 4. This transitional construction method enhances the project's adaptability and simplifies construction in complex scenarios, successfully avoiding the technical difficulties of cable support installation and complex construction encountered in traditional methods when crossing special terrains such as existing highways and rivers. This greatly enhances the adaptability and feasibility of the solution in complex geographical environments, simplifies the construction process, ensures project progress and quality, and broadens the application scope of the technology.

[0045] 5. This transitional construction method simplifies subsequent maintenance and management, further reducing long-term management costs, and these savings accumulate and increase as the line operates. Furthermore, the installation of relocation trenches and transition cable trenches enables short-distance construction, significantly improving operational efficiency compared to the long-distance construction of traditional methods.

[0046] 6. The second cable installation cable fixing device in this transition construction method uses cable tightening and crane lifting for transition, which can save the cable transition construction time during the beam replacement construction window, thereby significantly reducing the overall beam replacement operation time. After the cable fixing device is installed, it can serve two purposes: fixing to the contact wire pole and serving as a lifting point. The compression fixing method ensures both the firmness and reliability of the fixing and avoids scratch damage to the second cable during installation, disassembly, and hoisting. Attached Figure Description

[0047] Figure 1 A top view of a transition device for railway bridge cables;

[0048] Figure 2 A side view of a transition device for railway bridge cables;

[0049] Figure 3 A schematic diagram of a hoisting device for a transition device used in railway bridge cables;

[0050] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0051] Figure 5 for Figure 3 Enlarged view of point B in the image;

[0052] Figure 6 This is one of the schematic diagrams illustrating the lifting process of a transition device for railway bridge cables;

[0053] Figure 7 Schematic diagram 2 of a lifting process for a transition device used in railway bridge cables.

[0054] Figure 8 This is the third schematic diagram of the lifting process of a transition device for railway bridge cables;

[0055] Figure 9 This is the fourth schematic diagram of the lifting process of a transition device for railway bridge cables;

[0056] Figure 10 Fifth schematic diagram of the lifting process of a transition device for railway bridge cables;

[0057] Figure 11 This is the sixth schematic diagram of the lifting process of a transition device for railway bridge cables;

[0058] Figure 12 A fixing device for a transition device of railway bridge cables;

[0059] Figure 13 A schematic diagram of a cable fixing device for a transition device of railway bridge cables;

[0060] Figure 14 This is one of the schematic diagrams of a transition construction method for railway bridge cables;

[0061] Figure 15 This is the second schematic diagram of a transition construction method for railway bridge cables;

[0062] Figure 16 This is a flowchart of a transition construction method for railway bridge cables.

[0063] In the diagram: 1. Bridge pier; 2. Existing cable trough; 3. Lifting device; 31. Upright pole; 32. Fixed pole; 33. Horizontal bar; 34. Rope shaft; 35. Connecting rope; 36. Steering wheel; 37. First lifting device; 371. Vertical plate; 372. Movable plate; 373. First mounting plate; 374. Baffle; 375. Limiting rod; 376. Second mounting plate; 4. Second cable; 5. Existing bridge; 6. Relocation trough; 61. Vertical trough; 611. Vertical trough connecting plate; 62. Horizontal trough; 621. Horizontal trough connecting plate; 63. Second lifting device; 6 31. Base plate; 632. Wing plate; 633. Top plate; 634. Lifting ring; 635. Wedge block; 636. Connecting plate; 7. Transition cable trough; 8. Adjacent bridge; 9. Fixing device; 91. Upper plate; 911. Upper adjustment hole; 92. Adjusting vertical rod; 921. Nut; 93. Lower plate; 931. Lower adjustment hole; 10. Contact wire post; 11. Cable fixing device; 111. Lower cable fixing plate; 112. Upper cable fixing plate; 113. Cable lifting ring; 114. Connecting bolt; 115. Slot; 12. Lifting and hoisting equipment. Detailed Implementation

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0065] Example 1:

[0066] A transition device for railway bridge cables, such as Figures 1 to 13As shown, the structure includes several bridge piers 1, an existing bridge 5, and adjacent bridges 8. The bridge piers 1 are spaced apart and arranged in two rows. One row of bridge piers 1 is fitted with the existing bridge 5, which is the bridge to be replaced; the other row of bridge piers 1 is fitted with the adjacent bridge 8. The existing bridge 5 and the adjacent bridge 8 are arranged side by side. An existing cable trough 2 is fixed on one side of the bridge pier 1 of the existing bridge 5. The existing cable trough 2 is set along the existing bridge 5 and a first cable is laid in the existing cable trough 2. Several contact wire posts 10 are fixedly installed at intervals on the bridge piers 1. A second cable 4 is fixedly installed on the contact wire posts 10 on one side of the existing bridge 5 and on the existing bridge 5. Specifically, the first cable includes power cables, return cables, and signal cables, i.e., electrical cables; the second cable 4 includes positive feeders, protective conductors, and overhead ground wires, i.e., power supply cables.

[0067] like Figures 1 to 3As shown, transition cable troughs 7 are fixedly installed on several piers 1 located on one side of the adjacent bridge 8. The transition cable troughs 7 are set along the adjacent bridge 8 and are parallel to the existing cable troughs 2. One end of each of the two ends of the transition cable troughs 7 is fixedly installed, and the other ends of the two migration troughs 6 are fixedly installed at the cut-off positions of the two existing cable troughs 2. The migration troughs 6 are perpendicular to the existing cable troughs 2 and the transition cable troughs 7, so that the migration troughs 6, the existing cable troughs 2 and the transition cable troughs 7 form a U-shaped structure in the horizontal plane. The migration troughs 6 include a pair of vertical troughs 61 and a horizontal trough 62. The horizontal troughs 62 are set horizontally on the piers 1 and are lower than the existing cable troughs 2 and the transition cable troughs 7. The bottom ends of the vertical troughs 61 are hinged to the two ends of the horizontal troughs 62. The top end of one vertical trough 61 is fixedly installed on the existing cable trough 2, and the top end of the other vertical trough 61 is fixedly installed on the transition cable trough 7. Both vertical troughs 61 are set vertically, so that the pair of vertical troughs 61 and the horizontal troughs 62 form a U-shaped structure in the vertical plane. Both the vertical groove 61 and the horizontal groove 62 are made of channel steel. A vertical groove connecting plate 611 is fixed to the end of the vertical groove 61 near the horizontal groove 62, and horizontal groove connecting plates 621 are fixed to both ends of the horizontal groove 62. Both the vertical groove connecting plates 611 and 621 have round holes in their middle sections. After the two vertical grooves 61 are rotated upwards to be perpendicular to the horizontal groove connecting plates 621, U-bolts can be inserted between the round holes of the vertical groove connecting plates 611 and 621 to fix the vertical grooves 61. Alternatively, pins or mortise and tenon joints can be used for connection and fixation. Specifically, hinge pins are fixed to both ends of the horizontal groove 62, allowing the vertical groove 61 to rotate 90 degrees around the end of the horizontal groove 62. That is, the vertical groove 61 can rotate to form a straight line with the horizontal groove 62, or it can rotate to be perpendicular to the horizontal groove 62. The vertical channel 61 and the horizontal channel 62 adopt an integrated structural design and are connected by a hinged joint. After the entire transfer channel 6 is hoisted to the air, only the vertical channel 61 needs to be rotated to the designed angle to receive the first cable brought down from the existing bridge 5. This design eliminates the complex processes of on-site welding and bolt tightening at high altitudes, significantly reducing the time spent on high-altitude operations and avoiding the safety risks of secondary assembly at high altitudes.

[0068] When the clearance under pier 1 is low, or the hoisting conditions are insufficient, using large hoisting equipment to lift the relocation trough 6 could easily cause collisions with railway equipment, resulting in damage and, in severe cases, even affecting the normal operation of the railway. Therefore, hoisting device 3 can be used to lift the relocation trough 6. Figure 3 , Figure 4As shown, several hoisting devices 3 are fixedly installed at intervals on the pier 1. The number and installation position of the hoisting devices 3 are adjusted according to actual usage requirements. The hoisting device 3 includes a pair of uprights 31, a fixed rod 32, a crossbar 33, a rope shaft 34, a steering wheel 36, and a connecting rope 35. One end of the crossbar 33 is located on the pier 1 and is the fixed end, while the other end of the crossbar 33 is located on the migration groove 6 and is the cantilever end. A pair of uprights 31 are fixedly installed at intervals at the bottom end of the fixed end of the crossbar 33. The fixed rod 32 is installed horizontally through the bottom end of the pair of uprights 31. The pair of uprights 31 are respectively clamped on both sides of the pier cap of the pier 1, and the fixed rod 32 is clamped on the bottom end face of the pier cap of the pier 1. Specifically, a steel plate is fixedly installed inside the lower end of the uprights 31, the fixed rod 32 is placed on the steel plate, and nuts are threaded on both ends of the fixed rod 32 to ensure that the hoisting device 3 is firmly installed on the pier 1. A rope shaft 34 is rotatably mounted at the top of the fixed end of the crossbar 33, and a connecting rope 35 is wound and housed inside the rope shaft 34. A steering wheel 36 is laterally fixed at the top of the cantilever end of the crossbar 33, and a first lifting device 37 is fixed at the bottom of the cantilever end of the crossbar 33. A second lifting device 63 is fixed on the transverse groove 62. The connecting rope 35 extends laterally from the rope shaft 34 to the steering wheel 36, changes direction around the steering wheel 36 to vertically downward, and passes through the cantilever end of the crossbar 33 and the first lifting device 37 in sequence, finally being fixed at the top of the second lifting device 63. By rotating the rope shaft 34, the connecting rope 35 is tightened or loosened, thereby raising or lowering the second lifting device 63, completing the hoisting or unhoisting of the migration groove 6. Furthermore, a bracket is fixed on the crossbar 33, and a rotating shaft is installed on the bracket. The rope shaft 34 is threaded onto the rotating shaft to complete the rotational installation of the rope shaft 34; other rope shaft 34 installation methods with the same effect can also be used. Preferably, the crossbar 33 and the upright 31 can be made of I-beams or channel steel.

[0069] like Figure 4As shown, the first lifting device 37 includes a pair of vertical plates 371, a pair of movable plates 372, a pair of first mounting plates 373, a pair of baffles 374, and two pairs of limiting rods 375. The pair of vertical plates 371 are fixedly mounted at intervals to the bottom ends of the horizontal rod 33. The bottom ends of the pair of vertical plates 371 are respectively provided with vertically arranged second mounting plates 376, so that the vertical plates 371 and the second mounting plates 376 form an L-shaped structure; and the two second mounting plates 376 are arranged opposite to each other. The movable plate 372 is hinged at the connection between the vertical plates 371 and the second mounting plates 376. The movable plate 372 is placed on the second mounting plate 376 and can be rotated upwards by 90 degrees; the pair of movable plates 372 are arranged opposite to each other, and the interval between the pair of movable plates 372 is smaller than the interval between the pair of second mounting plates 376. A pair of vertical plates 371 are each fixedly mounted with a horizontally arranged first mounting plate 373 at their upper sections, with the first mounting plates 373 positioned opposite each other. Each end of the pair of first mounting plates 373 has a through hole, into which a baffle 374 is inserted. The shape of the through hole corresponds to the shape of the baffle 374. The baffle 374 has a T-shaped structure with a horizontal plate structure at its top, and the area of ​​the horizontal plate structure is larger than the area of ​​the through hole. This ensures that when the baffle 374 falls, the horizontal plate structure rests on the first mounting plate 373, preventing the baffle 374 from slipping out of the through hole. A pair of limiting rods 375 are hinged to each pair of first mounting plates 373, with the two pairs of limiting rods 375 positioned opposite each other. Each pair of limiting rods 375 is located on both sides of the baffle 374, and both sides of the baffle 374 have grooves. The length of the grooves corresponds to the thickness of the limiting rods 375, allowing the limiting rods 375 to be engaged within the grooves, thus limiting and fixing the baffle 374. Preferably, a spring is fixed between a pair of limiting rods 375, which is suitable for keeping the limiting rods 375 locked to the baffle 374 and has a reset function.

[0070] like Figure 5As shown, the second lifting device 63 includes a base plate 631, a pair of wing plates 632, a top plate 633, a lifting ring 634, a pair of wedge blocks 635, and a connecting plate 636. The base plate 631 is horizontally fixed to the top surface of the transverse groove 62. The connecting plate 636 is fixed to the middle of the top surface of the base plate 631 and is vertically arranged. Wing plates 632 are symmetrically fixed to both sides of the connecting plate 636. The wing plates 632 are perpendicular to the connecting plate 636 and parallel to the base plate 631. The top plate 633 is fixed to the top of the base plate 631. The top plate 633 is perpendicular to the connecting plate 636 and parallel to the wing plates 632. The lifting ring 634 is fixed to the middle of the top surface of the wing plate 632. The lifting ring 634 has a round hole in the middle for fixing the connecting rope 35. A pair of wedge-shaped blocks 635 are fixedly mounted at intervals on the top surface of the top plate 633. The pair of wedge-shaped blocks 635 are located on both sides of the lifting ring 634, and the distance between the top ends of the pair of wedge-shaped blocks 635 is greater than the distance between the pair of limiting rods 375, while the distance between the bottom ends of the pair of wedge-shaped blocks 635 is less than the distance between the pair of limiting rods 375. The cross-section of the bottom end of the wedge-shaped block 635 is greater than the cross-section of the top end of the wedge-shaped block 635, that is, the vertical cross-section of the wedge-shaped block 635 is a trapezoidal structure. Furthermore, the width of the top plate 633 is greater than the distance between the pair of movable plates 372, but less than the distance between the pair of second mounting plates 376 and the total width of the pair of wing plates 632. The total width of the pair of wing plates 632 is greater than the distance between the pair of movable plates 372, but less than the distance between the pair of second mounting plates 376.

[0071] like Figures 6 to 9As shown, during hoisting, tightening the connecting rope 35 causes the second lifting device 63 to move upward. The top plate 633 lifts up a pair of movable plates 372 and flips them upward. After the top plate 633 and the movable plates 372 are no longer in contact, the pair of movable plates 372 fall onto the second mounting plate 376 and the wing plate 632. The connecting rope 35 is then released, the second lifting device 63 falls back down, and the top plate 633 falls onto the pair of movable plates 372, so that the second lifting device 63 is locked inside the first lifting device 37, completing the hoisting. When releasing the hoisting device, tighten the connecting rope 35 to move the second lifting device 63 upward. A pair of wedge blocks 635 are located outside the two pairs of limiting rods 375 and move upward. As the cross-sectional area of ​​the pair of wedge blocks 635 gradually increases, that is, the distance between the pair of wedge blocks 635 gradually decreases, the wedge blocks 635 drive the two pairs of limiting rods 375 to rotate inward until the limiting rods 375 disengage from the grooves of the baffles 374. The pair of baffles 374 fall down under the action of gravity. During the upward movement of the second lifting device 63, a pair of wing plates 632 drive a pair of movable plates 372 to flip upward synchronously. At the same time, a pair of baffles 374 fall down and are located inside the pair of movable plates 372, preventing the movable plates 372 from flipping downward. This can limit the movement of the pair of movable plates 372 and keep them in the upward open state. At this time, loosen the connecting rope 35 again, and the second lifting device 63 falls down until it disengages from the first lifting device 37, completing the release of the hoisting device. The entire process of hoisting and detaching the migration trough 6 can be completed by one operator, which not only reduces the difficulty of operation but also saves labor costs.

[0072] like Figure 1 , Figure 12As shown, the transition cable trough 7 is fixed to the auxiliary structure of the pier 1 by several fixing devices 9, ensuring that the transition cable trough 7 is firmly and stably installed. The specific installation position and number of the fixing devices 9 are adjusted according to actual usage requirements. The fixing device 9 includes an upper plate 91, a lower plate 93, and a pair of adjusting vertical rods 92. The upper plate 91 and the lower plate 93 are spaced apart and are respectively clamped to the upper and lower sides of the auxiliary structure of the pier 1. Both the upper plate 91 and the lower plate 93 are elongated structures. The upper plate 91 has an upper adjusting hole 911, which is an elongated structure and is set along the upper plate 91. The lower plate 93 has two lower adjusting holes 931 spaced apart, both of which are elongated structures and are set along the lower plate 93. One of the lower adjusting holes 931 has an open structure at the outer end, so that the lower adjusting hole 931 communicates with the outside of the lower plate 93. A pair of adjusting vertical rods 92 are spaced apart. The top ends of both adjusting vertical rods 92 are inserted into upper adjusting holes 911. The top ends of the adjusting vertical rods 92 are provided with horizontal circular plate structures. The diameter of the horizontal circular plate structure is larger than the width of the upper adjusting holes 911, so that the pair of adjusting vertical rods 92 can not only move within the upper adjusting holes 911, but also will not come out of the upper adjusting holes 911. The bottom ends of the pair of adjusting vertical rods 92 are respectively inserted into two lower adjusting holes 931, and the bottom ends of both adjusting vertical rods 92 are threaded with nuts 921. The two adjusting vertical rods 92 are respectively clamped on the left and right sides of the auxiliary structure of the pier 1. The adjusting vertical rod 92, upper plate 91, and lower plate 93 form a rectangular structure. The auxiliary structure of the bridge pier 1 and the transition cable trough 7 are clamped in the middle of the rectangular structure. The transition cable trough 7 is firmly installed by tightening the nut 921. When removing it after the transition is completed, loosen the nut 921 and rotate the adjusting vertical rod 92 located in the semi-open lower adjusting hole 931 outward. The fixing device 9 is moved out through the rotating adjusting vertical rod 92. It is not only convenient and quick to install and remove, but also can be flexibly adjusted according to the size of the transition cable trough 7 and the auxiliary structure of the bridge pier 1. It has a wide range of applications, improves construction efficiency, and can avoid the loss of parts.

[0073] like Figures 13 to 15As shown, several cable fixing devices 11 are fixedly installed at intervals on the second cable 4. The cable fixing devices 11 are installed on the contact wire column 10. The cable fixing devices 11 located on the front and rear sides of the existing bridge 5 are lifted by the lifting equipment 12, so that the second cable 4 located on the section of the existing bridge 5 is raised to a height higher than the existing bridge 5, which is suitable for replacing the existing bridge 5. There is no need to lower the second cable 4 to the ground for transition. The method is simple and does not affect the replacement of the existing bridge 5. The cable fixing device 11 includes a lower cable fixing plate 111, an upper cable fixing plate 112, and several connecting bolts 114. The lower cable fixing plate 111 and the upper cable fixing plate 112 are respectively fastened to the upper and lower sides of the second cable 4, and the area of ​​the lower cable fixing plate 111 is larger than the area of ​​the upper cable fixing plate 112. The middle part of the lower cable fixing plate 111 and the middle part of the upper cable fixing plate 112 are respectively provided with corresponding semi-circular structures, so that after the lower cable fixing plate 111 and the upper cable fixing plate 112 are fastened together, a tubular space for threading the second cable 4 is formed between the lower cable fixing plate 111 and the upper cable fixing plate 112. Furthermore, a cable lifting ring 113 is fixed to the top of the upper cable fixing plate 112, and a circular hole is provided in the middle of the cable lifting ring 113 for connecting the lifting equipment 12. The two ends of the upper cable fixing plate 112 are fixed to the lower cable fixing plate 111 by a number of connecting bolts 114. The lower cable fixing plate 111 has a number of slots 115 spaced apart on one side. The slots 115 are U-shaped and suitable for mounting on the contact wire post 10 to fix the second cable 4. Preferably, pins, bolts, or other structures can also be fixed in the slots 115 for further fixing of the lower cable fixing plate 111.

[0074] Example 2:

[0075] A transition construction method for railway bridge cables, such as Figure 14 , Figure 15 As shown, it includes the following steps:

[0076] S101. Disconnect the existing cable trough 2, install a transition cable trough 7 at the adjacent bridge 8, and hoist the relocation trough 6 using the hoisting device 3 to connect the existing cable trough 2, the relocation trough 6, and the transition cable trough 7.

[0077] The existing cable trough 2 and the first cable in the existing cable trough 2 are disconnected at the adjacent pier 1 positions in the large and small mileage directions of the construction bridge span. The migration trough 6 is installed on the top surface of the pier 1 to connect the upstream and downstream piers 1. The hoisting device 3 is fixed on the pier 1. The migration trough 6 is hoisted onto the pier 1 by the hoisting device 3. After being lifted to the design height, the vertical groove 61 is rotated upward. Bolts are inserted into the vertical groove connecting plate 611 and the horizontal groove connecting plate 621 to fix the vertical groove 61 and the horizontal groove 62 of the migration trough 6, thus completing the installation of the migration trough 6.

[0078] S103. Lay the first cable in the existing cable trough 2, migration trough 6 and transition cable trough 7 to complete the transition of communication, signal and power cables:

[0079] The first cable is laid along the existing cable trough 2, migration trough 6 and transition cable trough 7 to complete the transition of the first cable from the upstream line to the adjacent line.

[0080] S105. Install several cable fixing devices 11 at intervals on the second cable 4, tighten the second cable 4 to the contact wire post 10, and fix the cable fixing devices 11 on the contact wire post 10:

[0081] Several cable fixing devices 11 are fixedly installed at intervals on the second cable 4. The second cable 4 is tightened to the contact wire post 10 by a traction device. The cable fixing device 11 is fixed to the rod of the contact wire post 10 through the slot 115 of the cable fixing device 11. The second cable 4 is tightened in sequence, and other cable fixing devices 11 are also clamped to the contact wire post 10.

[0082] S107. Release the fixing point between the second cable 4 and the existing bridge 5, and use the lifting equipment 12 to lift the cable fixing devices 11 located on both sides of the existing bridge 5, raising the second cable 4 of the existing bridge 5 to complete the transition of the positive feeder, protective wire, and overhead ground wire:

[0083] Release the fixed node constraint between the second cable 4 and the existing bridge 5, and equip the two ends of the construction bridge span with lifting equipment 12, with the lifting point set at the round hole of the cable lifting ring 113; use the lifting equipment 12 to lift the two cable fixing devices 11 located on both sides of the existing bridge 5, so that the lowest point of the second cable 4 in the section of the existing bridge 5 is higher than the upper part of the existing bridge 5.

[0084] S109, Replacement of existing bridge 5:

[0085] Replace the existing bridge 5. After the replacement is completed, release the hoisting device 3 from the hoisting of the transfer trough 6, remove the transfer trough 6, the transition cable trough 7, and the fixing device 9, reconnect the disconnected existing cable trough 2, re-lay the first cable in the existing cable trough 2, lower the second cable 4 to the replaced bridge using the hoisting equipment 12, fix the second cable 4 to the replaced bridge and the contact wire column 10, and remove the cable fixing device 11.

[0086] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A transition device for railway bridge cable, a plurality of piers (1) are respectively fixed with an existing bridge (5) and an adjacent bridge (8), the existing bridge (5) and the adjacent bridge (8) are arranged side by side and spaced, the front and rear sides of the existing bridge (5) are respectively fixed with an existing cable trough (2), and the piers (1) at both ends of the existing bridge (5) are provided with catenary posts (10), characterized in that, include: A transition cable trough (7) is provided along the adjacent bridge (8) and fixedly mounted on the pier (1) of the adjacent bridge (8); A pair of migration troughs (6) are respectively fixedly connected between the two ends of the existing cable trough (2) and the transition cable trough (7), and are both fixedly installed on the corresponding bridge piers (1). The existing cable trough (2), the transition cable trough (7) and the migration trough (6) are provided with first cables. Several hoisting devices (3) are fixedly installed on the pier (1) at intervals. A traction device is fixedly installed at one end of the hoisting device (3), and a first lifting device (37) is fixedly installed at the other end of the hoisting device (3). The first lifting device (37) is located above the migration trough (6), and a second lifting device (63) is fixedly installed on the migration trough (6). When hoisting the transfer trough (6), the traction device drives the second lifting device (63) to move upward and engage with the first lifting device (37); The second cable (4) is fixed on the contact wire post (10). A cable fixing device (11) is fixed on the second cable (4). The cable fixing device (11) is lifted by a lifting and hoisting device (12) and is suitable for supporting the second cable (4) above the existing bridge (5).

2. The transition device for railway bridge electrical cables of claim 1, characterized in that, The migration trough (6) includes a pair of vertical troughs (61) and horizontal troughs (62). The two ends of the horizontal trough (62) are respectively vertically installed with the vertical troughs (61). One of the vertical troughs (61) is fixed on the existing cable trough (2), and the other vertical trough (61) is fixed on the transition cable trough (7). The second lifting device (63) is fixedly mounted on the transverse groove (62).

3. Transition device for railway bridge cables according to claim 1 or 2, characterized in that The hoisting device (3) includes a pair of uprights (31) and a crossbar (33). The fixed end of the crossbar (33) is fixed to the pier (1) by the pair of uprights (31), and the cantilever end of the crossbar (33) extends above the migration groove (6). The traction device includes a rope shaft (34) and a connecting rope (35). The rope shaft (34) is rotatably mounted on the top end of the crossbar (33), and the connecting rope (35) is wound inside the rope shaft (34). The first lifting device (37) is fixed at the bottom end of the cantilever end of the crossbar (33), and the connecting rope (35) passes through the first lifting device (37) and connects to the second lifting device (63).

4. The transition device for railway bridge cables according to claim 3, characterized in that, The first lifting device (37) includes a pair of vertical plates (371), a pair of movable plates (372), a pair of first mounting plates (373), a pair of baffles (374), and two pairs of limiting rods (375). The pair of vertical plates (371) are fixedly mounted on the horizontal bar (33) at intervals. The bottom end of the pair of vertical plates (371) is vertically provided with a second mounting plate (376) with an inwardly turned edge. The pair of movable plates (372) are respectively hinged on the pair of vertical plates (371), and the movable plates (372) are symmetrically located on the second mounting plate (376). The first mounting plate (373) is horizontally and symmetrically fixed on the inner side of the upper section of the pair of vertical plates (371); A pair of first mounting plates (373) are vertically movable and pass through the baffle (374). Each first mounting plate (373) is hinged with a pair of limiting rods (375). The two pairs of limiting rods (375) are respectively arranged on both sides of the baffle (374). The baffle (374) has grooves on the middle edge of both sides. When each pair of limiting rods (375) are arranged in parallel, the limiting rods (375) are engaged in the groove of the baffle (374); when each pair of limiting rods (375) are rotated and arranged facing each other, the baffle (374) moves downward so that its top end contacts the limiting rods (375).

5. The transition device for railway bridge cables according to claim 4, characterized in that, The second lifting device (63) includes a base plate (631), a connecting plate (636), a pair of wing plates (632), a top plate (633), a pair of wedge blocks (635), and a lifting ring (634). The base plate (631) is fixed to the top of the migration groove (6). The connecting plate (636) is vertically installed on the base plate (631). The pair of wing plates (632) are symmetrically fixed to both sides of the connecting plate (636). The top plate (633) is fixed to the top of the connecting plate (636). The lifting ring (634) is fixed in the middle of the top plate (633), and the lifting ring (634) is adapted to install the connecting rope (35). A pair of wedge blocks (635) are fixed at the top of the top plate (633) outside the lifting ring (634). The pair of wedge blocks (635) move upward and drive the two pairs of limiting rods (375) to rotate in opposite directions along the hinge axis.

6. The transition device for railway bridge cables according to claim 1 or 2, characterized in that, The transition cable trough (7) is fixed to the additional structure of the pier (1) by a fixing device (9). The fixing device (9) includes an upper plate (91), a lower plate (93) and a pair of adjusting vertical rods (92). The upper plate (91), the lower plate (93) and the pair of adjusting vertical rods (92) form a rectangular structure. The transition cable trough (7) is located between the rectangular structures. The upper plate (91) has an elongated upper adjustment hole (911), and the lower plate (93) has two lower adjustment holes (931) spaced apart. The top ends of a pair of adjustment rods (92) are inserted into the upper adjustment holes (911), and the bottom ends of a pair of adjustment rods (92) are respectively inserted into the two lower adjustment holes (931). One of the lower adjustment holes (931) is a semi-open structure, and the bottom ends of the pair of adjustment rods (92) are threaded with nuts (921).

7. The transition device for railway bridge cables according to claim 1 or 2, characterized in that, The cable fixing device (11) includes a lower cable fixing plate (111), an upper cable fixing plate (112), and a cable lifting ring (113). The upper cable fixing plate (112) is fixedly mounted on the lower cable fixing plate (111), and the cable lifting ring (113) is fixedly mounted on the upper cable fixing plate (112). The lower cable fixing plate (111) has several slots (115) spaced apart along its edge, which are suitable for being fastened to the contact wire column (10). The upper cable fixing plate (112) and the lower cable fixing plate (111) are respectively made with corresponding semi-circular structures. The upper cable fixing plate (112) and the lower cable fixing plate (111) are fastened together to form a tubular structure, and the second cable (4) is inserted into the tubular structure.

8. A transition construction method for railway bridge cables, characterized in that, Construction using the transition device for railway bridge cables as described in any one of claims 1 to 7 includes the following steps: The existing cable trough (2) is disconnected, and a transition cable trough (7) is fixed at the adjacent bridge (8). The relocation trough (6) is hoisted by the hoisting device (3) to connect the existing cable trough (2), the relocation trough (6) and the transition cable trough (7). The first cable is laid in the existing cable trough (2), the migration trough (6) and the transition cable trough (7) to complete the transition of communication, signal and power cables; Several cable fixing devices (11) are fixedly installed at intervals on the second cable (4), the second cable (4) is tightened to the contact wire post (10), and the cable fixing devices (11) are fixedly installed on the contact wire post (10); Release the fixing point between the second cable (4) and the existing bridge (5), and use the lifting equipment (12) to lift the cable fixing device (11) located on both sides of the existing bridge (5), raise the second cable (4) at the existing bridge (5), and complete the transition of positive feeder, protective line and overhead ground wire; Replace the existing bridge (5).

9. The transition construction method for railway bridge cables according to claim 8, characterized in that, After replacing the existing bridge (5), connect the existing cable trough (2), remove the migration trough (6) and the transition cable trough (7), and move the first cable back into the existing cable trough (2); Remove the cable fixing device (11), lower the second cable (4), and connect the second cable (4) to the replaced bridge.

10. The transition construction method for railway bridge cables according to claim 9, characterized in that, When hoisting the migration trough (6), tighten the connecting rope (35), the second lifting device (63) moves upward, the wedge block (635) drives a pair of movable plates (372) to flip upward and fall, loosen the connecting rope (35), and the top plate (633) falls and is clamped on the pair of movable plates (372), which is suitable for fixing the migration trough (6). When the hoisting of the migration groove (6) is released, the connecting rope (35) is tightened, the second lifting device (63) moves upward, a pair of wing plates (632) drive a pair of movable plates (372) to flip upward, the wedge block (635) drives the limiting rod (375) to rotate, so that the limiting rod (375) disengages from the baffle (374), the baffle (374) falls down to block the movable plate (372), which is suitable for moving the second lifting device (63) out of the first lifting device (37).

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