A rigid catenary maintenance method

Abstract

The present application relates to the technical field of contact network maintenance, and proposes a rigid contact network maintenance method, comprising the following steps: S1, confirming the wear critical value M of the contact network; S2, measuring the wear value of the contact network from one end of the contact network, if the wear value of the contact network is greater than M, marking the position as position P, and performing S3; S3, setting a transition contact network at position P; S4, installing the transition contact network at each position where the wear value of the contact network exceeds M; S5, regularly inspecting the position where the wear value recorded in the account is located; S6, regularly inspecting the wear value of the contact network and the transition contact network. The present application connects the transition contact network in parallel on one side of the contact network whose wear exceeds the critical value by using the fixed connection of the transition support and the fixed support, which not only does not need to remove the original contact network, but also can realize the rapid installation of the transition contact network, and speeds up the maintenance efficiency of the contact network.

Description

Technical Field

[0001] This invention relates to the field of overhead contact line maintenance technology, and more particularly to a method for maintaining rigid overhead contact lines. Background Technology

[0002] Rigid contact wire is a type of contact wire. It has been widely used due to its advantages such as simple structure, short construction period, small footprint, and construction not being affected by weather. However, rigid contact wire does not have good elasticity and its wear rate is relatively high. In order to ensure the safe operation of trains, it is necessary to regularly maintain the wear points of the rigid contact wire.

[0003] Patent publication number CN117029696A discloses a method and equipment for detecting wear on rigid suspension contact wires. Based on special texture features in light strip images, it identifies the location of wear, enabling non-invasive detection with high accuracy and real-time performance. This method allows for detection without affecting the normal operation of railway trains, providing an effective guarantee for the power supply maintenance of subway lines.

[0004] After completing the wear test of the overhead contact line, it is necessary to replace the entire or part of the overhead contact line with significant wear. Currently, when replacing the overhead contact line, the suspension brackets are usually re-laid by re-drilling holes and pre-embedding. This method not only complicates the maintenance operation of the overhead contact line, but also affects the installation accuracy of the replaced overhead contact line. Summary of the Invention

[0005] In view of this, the present invention proposes a method for maintaining a rigid contact network, which utilizes the cooperation between the original fixed brackets and the transition brackets to achieve rapid deployment of the transition brackets and accelerate the maintenance efficiency of the contact network.

[0006] The technical solution of this invention is implemented as follows: This invention provides a method for maintaining a rigid contact wire, comprising the following steps:

[0007] S1, confirm the critical wear value M of the contact wire;

[0008] S2, measure the wear value of the contact wire from one end. If the wear value of the contact wire is less than M and greater than / M, then record it in the ledger. If the wear value of the contact wire is greater than M, then record this position as position P and proceed to S3.

[0009] S3, a transition contact network is set at position P. The transition contact network is parallel to and spaced apart from the contact network. Multiple fixing brackets for fixing it in the tunnel are evenly distributed on the contact network. The two ends of the transition contact network are fixedly connected to the two fixing brackets located on both sides of position P through the transition brackets. The two ends of the transition contact network are electrically connected to the contact network through wires.

[0010] S4, repeat S2-S3, and install the transition contact wire at each location where the wear value of the contact wire exceeds M;

[0011] S5 sorts the wear values ​​of the ledger entries from largest to smallest and conducts regular inspections of their respective locations.

[0012] S6, periodically inspect the wear value of the contact wire and the transition contact wire, and repeat S1-S5.

[0013] Based on the above technical solutions, preferably, multiple insulating components are fixedly installed on both the contact wire and the transition contact wire;

[0014] The fixed support includes a top beam, a bottom beam, and uprights, wherein,

[0015] The top beam is used for fixed connection with the tunnel;

[0016] The bottom beam is fixedly mounted on the insulating component of the contact wire;

[0017] The column is fixedly installed between the top beam and the bottom beam.

[0018] More preferably, the transition support includes two clamping plates, a cantilever rod, and a fixing seat, wherein,

[0019] The card plate is provided with a U-shaped groove, and the two card plates are respectively engaged with the two opposite sides of the column through the U-shaped groove. The distance between the two card plates is not less than the outer diameter of the column.

[0020] The cantilever rod is detachably fixed to the bottom beam, and one end of it is fixedly connected to the insulating component on the transition contact network.

[0021] The fixing seat is fixedly installed between the two clamping plates and is engaged between the cantilever rod and the bottom beam.

[0022] More preferably, two wedges are fixedly installed on the cantilever rod, and the two wedges are engaged with the bottom beam.

[0023] More preferably, a roller is rotatably provided at the end of the lever away from the insulating member.

[0024] More preferably, in step S3, after the transition contact network and the fixed bracket are fixedly connected by the transition bracket, a hanger is fixedly installed on the top side of the transition contact network at a position corresponding to position P. The hanger is connected to two counterweights by two hanging ropes, and the two hanging ropes are respectively wound around the two rollers.

[0025] Based on the above technical solutions, preferably, both the top beam and the bottom beam are channel steel structures with the same cross-section, and the top beam and the bottom beam are arranged opposite to each other;

[0026] A mounting frame is fixedly installed on the top side of the top beam. The mounting frame is used to fix and connect to the inner wall of the tunnel, and a gap is provided between the top side of the top beam and the inner wall of the tunnel.

[0027] The length of the fixing seat along the width direction of the bottom beam is equal to the inner diameter of the bottom beam.

[0028] More preferably, during the inspection of the contact network, if it is found that the connection between the mounting bracket and the tunnel wall is loose, the transition bracket is removed, the cantilever is fixedly set on the top beam, the fixing seat is snapped between the top beam and the cantilever, the two clamping plates are snapped onto the two opposite sides of the column through the U-shaped groove, and the cantilever is fixedly connected to the tunnel wall.

[0029] Based on the above technical solutions, preferably, the installation height of the transition contact network is lower than the installation height of the contact network.

[0030] Based on the above technical solutions, preferably, the wire is located between the interconnected fixed bracket and the transition bracket.

[0031] The rigid contact wire maintenance method of the present invention has the following advantages over the prior art:

[0032] (1) By using the fixed connection between the transition bracket and the fixed bracket to connect the transition contact network in parallel on the side of the contact network whose wear exceeds the critical value, not only is it not necessary to remove the original contact network, but the transition contact network can also be installed quickly, thus speeding up the maintenance efficiency of the contact network.

[0033] (2) By setting rollers, hangers, ropes and counterweights can be used to suspend and support the wear-prone parts of the contact network, which can enhance its anti-deformation performance, slow down its wear rate and increase the overall service life of the contact network.

[0034] (3) By setting the top beam and bottom beam to be of the same specifications and in opposite positions, the transition support can be installed on the top beam to strengthen the fixing of the top beam to the tunnel wall and maximize the function of the transition support. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a top view of the transition contact wire layout position in a rigid contact wire maintenance method according to the present invention;

[0037] Figure 2 This is a perspective view of the contact wire in a rigid contact wire maintenance method according to the present invention;

[0038] Figure 3 This is a perspective view of the fixed bracket in a rigid contact wire maintenance method according to the present invention;

[0039] Figure 4 This is a perspective view of the transition support in a rigid contact wire maintenance method according to the present invention;

[0040] Figure 5 This is a perspective view of the wedge block in a rigid contact wire maintenance method according to the present invention;

[0041] Figure 6 This is a front view of the suspension rope in a rigid contact wire maintenance method according to the present invention;

[0042] Figure 7 This is a perspective view of the connection state between the transition support and the top beam in a rigid contact wire maintenance method according to the present invention.

[0043] The components include: 1. Contact wire; 11. Insulating parts; 2. Transition contact wire; 21. Hanger; 22. Suspension rope; 23. Counterweight; 3. Fixed bracket; 31. Top beam; 311. Mounting frame; 32. Bottom beam; 33. Column; 4. Transition bracket; 41. Clamping plate; 42. Cantilever rod; 421. Roller; 422. Wedge; 43. Fixed seat; 401. U-shaped groove; 5. Conductor. Detailed Implementation

[0044] The technical solutions of this invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] like Figure 1-7 As shown, a rigid contact wire maintenance method of the present invention includes the following steps:

[0046] S1, confirm the wear threshold value M of the contact wire 1. When the wear value of the contact wire 1 is greater than M, it means that the contact wire 1 can no longer be used and needs to be replaced.

[0047] S2, measure the wear value of the contact wire 1 from one end. If the wear value of the contact wire 1 is less than M and greater than 1 / 2M, it means that there is a large wear at this position of the contact wire 1, and regular inspection is required and the data is recorded. If the wear value of the contact wire 1 is greater than M, then record this position as position P and proceed to S3. Position P is the position where the contact wire 1 needs to be replaced.

[0048] S3, a transition contact wire 2 is installed at position P, such as Figure 1 As shown, the transition contact network 2 is set parallel to and spaced apart from the contact network 1. Multiple fixed supports 3 are evenly distributed on the contact network 1 to fix it in the tunnel. The two ends of the transition contact network 2 are fixedly connected to the two fixed supports 3 located on both sides of position P through transition supports 4. The two ends of the transition contact network 2 are electrically connected to the contact network 1 through wires 5. The principle is that a transition contact network 2 is connected in parallel at the position where the wear value of the contact network 1 exceeds the standard, so that the pantograph of the vehicle conducts electricity through friction with the transition contact network 2, instead of through friction with the position where the wear value of the contact network 1 exceeds the standard. At this time, the installation height of the transition contact network 2 should be lower than the installation height of the contact network 1. The setting of the transition contact network 2 is achieved by disassembling and assembling the transition supports 4 and the fixed supports 3, without the need for repositioning, drilling or other operations according to the installation of the transition contact network 2. This not only avoids the impact of the reinstallation of the suspension structure on the laying accuracy of the contact network 1 and the transition contact network 2, but also speeds up the installation efficiency of the transition contact network 2 and the overall maintenance efficiency of the contact network 1.

[0049] To facilitate the quick assembly and disassembly of the fixed bracket 3 and the transition bracket 4, the following design was made for their specific structures.

[0050] The fixed support 3 includes a top beam 31, a bottom beam 32, and a column 33. The top beam 31 is used for fixed connection to the tunnel; the bottom beam 32 is fixedly mounted on the insulating component 11 on the contact wire 1; and the column 33 is fixedly mounted between the top beam 31 and the bottom beam 32. Figure 3 and Figure 4 As shown, multiple insulating components 11 are fixedly installed on both the contact wire 1 and the transition contact wire 2 to prevent electrical conduction between the contact wire 1 and the transition contact wire 2 and their hoisting structure. The top beam 31 is fixedly installed at the top of the tunnel. The bottom beam 32 first fixes the insulating components 11 on the contact wire 1, and then fixes them to the top beam 31 through the column 33, thereby achieving the effect of fixing the contact wire 1 to the top of the tunnel.

[0051] Corresponding to the aforementioned fixed bracket 3, the transition bracket 4 includes two clamping plates 41, a cantilever rod 42, and a fixing seat 43. The clamping plates 41 have U-shaped grooves 401, and the two clamping plates 41 are respectively clamped onto two opposite sides of the column 33 through the U-shaped grooves 401. The distance between the two clamping plates 41 is not less than the outer diameter of the column 33. The cantilever rod 42 is detachably fixed to the bottom beam 32, and one end of it is fixedly connected to the insulating component 11 on the transition contact network 2. The fixing seat 43 is fixedly disposed between the two clamping plates 41 and clamped between the cantilever rod 42 and the bottom beam 32. Figure 4 and Figure 5 As shown, the two clamping plates 41 are engaged with the column 33 through the U-shaped groove 401. Combined with the fixing of the cantilever rod 42 and the bottom beam 32, the fixing seat 43 can be firmly fixed on the bottom beam 32, preventing the fixing seat 43 from shaking with the bottom beam 32. Of course, two wedges 422 can also be fixed on the cantilever rod 42, so that the two wedges 422 are engaged with the bottom beam 32. With the above structure, not only can the assembly efficiency of the transition bracket 4 and the fixing bracket 3 be improved, but also the degree of their fixation can be improved.

[0052] There are many reasons for the significant wear at position P in the contact wire 1. Among these reasons, the most effective solution is to assume a suspension point at position P. To address this issue, it is preferable to have a roller 421 rotatably mounted at the end of the cantilever 42 away from the insulator 11. Correspondingly, as shown... Figure 6 As shown, a hanger 21 is fixedly installed on the top side of the transition contact network 2 at a position corresponding to position P. The hanger 21 is connected to two counterweights 23 by two suspension ropes 22, and the two suspension ropes 22 are respectively wound around two rollers 421. The counterweights 23 are used to suspend the wear-prone points of the transition contact network 2. Compared with the method of resetting the suspension structure, the same effect of quick assembly can be achieved, which improves the overall maintenance efficiency of the contact network 1.

[0053] like Figure 1 and Figure 4 As shown, the parallel connection of contact wire 1 and transition contact wire 2 requires the installation of conductors 5 at both ends. In order to improve the fixation of conductors 5, it is preferable to place conductors 5 between the interconnected fixed brackets 3 and transition brackets 4 to enhance the anti-deformation performance of conductors 5.

[0054] S4, repeat S2-S3, install transitional contact wire 2 at each location where the wear value of contact wire 1 exceeds M, to realize the maintenance operation of the entire contact wire 1.

[0055] S5 sorts the wear values ​​of the ledger entries from largest to smallest and conducts regular inspections on their respective locations. The record location has relatively higher wear than other locations and is a priority location, so it needs to be inspected regularly. When the wear value of the record location is greater than M, it can be detected and maintained in a timely manner.

[0056] S6. Of course, wear problems also exist in other parts of the contact network 1 and the newly installed transition contact network 2. Therefore, it is also necessary to regularly inspect the wear values ​​of the contact network 1 and the transition contact network 2, and repeat S1-S5.

[0057] During the inspection of the overhead contact line 1, the connection between the mounting bracket 311 and the tunnel wall may become loose. To ensure the normal power supply of the overhead contact line 1, it is necessary to repair this loose position. This can be achieved by installing a new mounting bracket 3 on one side of the original mounting bracket 3, or by re-drilling holes to re-fix the top beam 31. This operation is relatively cumbersome. To simplify this operation, the mounting bracket 3 can be improved by making both the top beam 31 and the bottom beam 32 channel steel structures with identical cross-sections, allowing them to be positioned opposite each other. The mounting bracket 311 is fixedly installed on the top side of the top beam 31, serving as a fixed connection to the tunnel wall, with a gap between the top side of the top beam 31 and the tunnel wall. The length of the fixing seat 43 along the width of the bottom beam 32 is equal to the inner diameter of the bottom beam 32. Figure 3 As shown, the top beam 31 and bottom beam 32 are symmetrically arranged, have the same structure, and are in the same relative relationship with the column 33. Furthermore, there is a gap between the top beam 31 and the tunnel wall. If the connection between the mounting frame 311 and the tunnel wall is found to be loose, such as... Figure 7 As shown, a new transition bracket 4 can be removed, and the cantilever rod 42 can be fixedly set on the top beam 31. The fixing seat 43 can be snapped between the top beam 31 and the cantilever rod 42 and located inside the top beam 31. The two clamping plates 41 can be snapped onto the two opposite sides of the column 33 through the U-shaped groove 401. Then, the cantilever rod 42 can be fixedly connected to the tunnel wall. The installation method of the top beam 31 and the bottom beam 32 is the same as that of the transition bracket 4. The only difference is that the transition bracket 4 on the top beam 31 is connected and fixed to the tunnel wall. This not only makes the maintenance operation of the contact network 1 uniform and facilitates training, but also enables the rapid maintenance of the contact network 1 as a whole.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for maintaining a rigid overhead contact line, characterized in that, Includes the following steps: S1, confirm the wear threshold value M of the contact wire (1); S2, measure the wear value of the contact wire (1) from one end. If the wear value of the contact wire (1) is less than M and greater than 1 / 2M, then make a record. If the wear value of the contact wire (1) is greater than M, then record this position as position P and proceed to S3. S3, a transition contact network (2) is set at position P. The transition contact network (2) is parallel to and spaced apart from the contact network (1). Multiple fixing brackets (3) for fixing the contact network (1) are evenly distributed on the contact network (1). The two ends of the transition contact network (2) are fixedly connected to the two fixing brackets (3) located on both sides of position P through transition brackets (4). The two ends of the transition contact network (2) are electrically connected to the contact network (1) through wires (5). S4, repeat S2-S3, and install the transition contact network (2) at each location where the wear value of the contact network (1) exceeds M. S5 sorts the wear values ​​of the ledger entries from largest to smallest and conducts regular inspections of their respective locations. S6, periodically inspect the wear values ​​of the contact wire (1) and the transition contact wire (2), and repeat S1-S5; Multiple insulating components (11) are fixedly installed on both the contact wire (1) and the transition contact wire (2); the fixed support (3) includes a top beam (31), a bottom beam (32) and a column (33), wherein the top beam (31) is used for fixed connection with the tunnel; the bottom beam (32) is fixedly installed on the insulating components (11) on the contact wire (1); the column (33) is fixedly installed between the top beam (31) and the bottom beam (32); The transition support (4) includes two clamping plates (41), a cantilever rod (42), and a fixing seat (43). The clamping plates (41) are provided with U-shaped grooves (401). The two clamping plates (41) are respectively clamped to the two opposite sides of the column (33) through the U-shaped grooves (401). The distance between the two clamping plates (41) is not less than the outer diameter of the column (33). The cantilever rod (42) is detachably fixed to the bottom beam (32), and one end of it is fixedly connected to the insulating part (11) on the transition contact network (2). The fixing seat (43) is fixedly arranged between the two clamping plates (41) and clamped between the cantilever rod (42) and the bottom beam (32). A roller (421) is rotatably provided at the end of the lifting rod (42) away from the insulating member (11). In step S3, after the transition contact network (2) and the fixed bracket (3) are fixedly connected by the transition bracket (4), a hanger (21) is fixedly installed on the top side of the transition contact network (2) at the position corresponding to position P. The hanger (21) is connected to the two counterweights (23) by two hanging ropes (22), and the two hanging ropes (22) are respectively wound around the two rollers (421).

2. The method for maintaining a rigid contact wire as described in claim 1, characterized in that: Two wedges (422) are fixedly installed on the cantilever (42), and the two wedges (422) are engaged with the bottom beam (32).

3. The method for maintaining a rigid contact network as described in claim 2, characterized in that: The top beam (31) and the bottom beam (32) are both channel steel structures, and their cross-sections are the same. The top beam (31) and the bottom beam (32) are arranged opposite to each other. A mounting bracket (311) is fixedly provided on the top side of the top beam (31). The mounting bracket (311) is used to fix and connect with the inner wall of the tunnel, and a gap is provided between the top side of the top beam (31) and the inner wall of the tunnel. The length of the fixed seat (43) along the width direction of the bottom beam (32) is equal to the inner diameter of the bottom beam (32).

4. The method for maintaining a rigid contact network as described in claim 3, characterized in that: During the inspection of the contact wire (1), if it is found that the connection between the mounting bracket (311) and the tunnel wall is loose, the transition bracket (4) is removed, the cantilever rod (42) is fixed on the top beam (31), the fixing seat (43) is snapped between the top beam (31) and the cantilever rod (42), the two clamping plates (41) are snapped onto the two opposite sides of the column (33) through the U-shaped groove (401), and the cantilever rod (42) is fixedly connected to the tunnel wall.

5. A method for maintaining a rigid contact network as described in claim 1, characterized in that: The installation height of the transition contact network (2) is lower than the installation height of the contact network (1).

6. A method for maintaining a rigid contact network as described in claim 1, characterized in that: The conductor (5) is located between the fixed bracket (3) and the transition bracket (4) that are connected to each other.

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