A linkage limiting type contact wire compensation pulley block

Abstract

This utility model discloses a linkage-limiting contact network compensation pulley system, which includes a fixed pulley system, a movable pulley system, a compensation rope, and a wedge-shaped clamp. Its innovation lies in the symmetrical connection of two sets of foldable steel belt mechanisms between the pulley shafts of the fixed-side linkage wheel of the fixed pulley system and the movable-side linkage wheel of the movable pulley system. These mechanisms consist of long and short connecting plates hinged together by connecting plate rivets and connected into a rigid frame by a spacer bolt assembly. This achieves forced synchronous deflection between the fixed and movable pulley systems, effectively preventing the compensation rope from jumping out of its groove and from wearing. By setting backstop blocks on the fixed plates of the fixed and movable pulleys, which cooperate with the foldable steel belt mechanisms, mechanical hard limits are formed at the extension and folding limit positions, effectively preventing overtravel. Its high structural integration significantly improves the safety of the compensation system operation.

Description

Technical Field

[0001] This utility model relates to the technical field of overhead contact system components for electrified railways, and in particular to a linkage limiting type overhead contact system compensation pulley block. Background Technology

[0002] The catenary compensation device for electrified railways is a key piece of equipment for ensuring constant tension in the contact wire. Its core component, the compensation pulley block, utilizes the pulley travel principle to convert the minute stretching and contraction of the contact wire into a larger displacement of the weight, thus maintaining tension stability. Traditional compensation pulley blocks connect the fixed and movable pulley blocks only through a single enclosed steel wire rope. This purely flexible connection method has inherent defects: when the fixed pulley block deflects due to installation errors or vibration, the movable pulley block cannot follow suit, resulting in inconsistent relative angular displacements. This causes friction, biting, or even skipping of the pulley grooves between the steel wire rope and the pulley, accelerating wear. Furthermore, existing devices lack reliable mechanical end-of-travel limits, posing a risk of overtravel damage. Therefore, a novel integrated structure is urgently needed to solve the problems of asynchronous deflection and unreliable limit switches. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a linkage limiting contact network compensation pulley block, which can enable the fixed pulley block and the moving pulley block to achieve forced synchronous deflection and can rigidly limit the stroke through a mechanical structure.

[0004] To make the technical solution of this utility model clearer, both the fixed pulley fixing plate and the movable pulley fixing plate are long strips arranged vertically perpendicular to the horizontal ground, with their upper end surface defined as the top surface and their lower end surface defined as the bottom surface.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A linkage limiting contact wire compensation pulley group includes a fixed pulley group, a movable pulley group, a compensation rope, and a wedge-shaped wire clamp for fixing the end of the compensation rope. The fixed pulley group and the movable pulley group are each equipped with at least one pulley.

[0007] The pulley closest to the movable pulley group in the fixed pulley group is the fixed-side linkage pulley, and its pulley axle is the first linkage pulley axle;

[0008] The pulley closest to the fixed pulley group in the movable pulley group is the movable side linkage pulley, and its pulley axle is the second linkage pulley axle;

[0009] Two sets of symmetrically arranged foldable steel belt mechanisms are connected between the first linkage pulley shaft and the second linkage pulley shaft. The two sets of foldable steel belt mechanisms are connected by a spacer bolt assembly to form a rigid support structure to ensure their synchronous movement and force transmission.

[0010] The fixed pulley assembly includes a fixed pulley fixing plate, and a long connecting plate backstop block is provided on the top surface of the fixed pulley fixing plate. The movable pulley assembly 200 includes a movable pulley fixing plate, and two short connecting plate backstop blocks are provided on the top surface of the movable pulley fixing plate. Both the long connecting plate backstop block and the short connecting plate backstop block are used to limit the extreme rotation range of the foldable steel belt mechanism.

[0011] One end of the compensating rope is connected to a pulley block fixing plate through the wedge clamp, and the other end passes around the corresponding pulleys on the fixed pulley block and the movable pulley block in sequence, and runs vertically down from the pulley in the fixed pulley block that is farthest from the movable pulley block.

[0012] In a further improvement, the foldable steel strip mechanism includes a long connecting plate, a short connecting plate, and connecting plate rivets;

[0013] One end of the long connecting plate is provided with a first connecting end, and the other end is provided with a first hinge end. A first turning part is provided between the first connecting end and the first hinge end, and a U-shaped earring plate is provided near the first hinge end.

[0014] One end of the short connecting plate is provided with a second connecting end, and the other end is provided with a second hinge end. A second turning part is provided between the second connecting end and the second hinge end.

[0015] The long connecting plate and the short connecting plate are hinged together by the first hinge end, the second hinge end, and the connecting plate rivets.

[0016] In a further improvement, thickened plates are welded to the ends of both the first and second connecting ends, and the first and second connecting ends are internally threaded holes that are threaded to the ends of the first and second linkage pulley shafts, respectively.

[0017] In a further improvement, the long connecting plate backstop block is positioned close to the first linkage pulley shaft and away from the side where the long connecting plate reciprocates, for contacting the side of the first connecting end of the long connecting plate when the foldable steel belt mechanism is in its extreme position;

[0018] The two short connecting plate backstop blocks are respectively disposed on opposite sides of the second linkage pulley shaft, and are used to contact the top surface of the short connecting plate when the foldable steel belt mechanism is in the extreme position.

[0019] Further improvements include matching the number, size, and arrangement of pulleys in the fixed and movable pulley groups with the winding method of the compensating rope to achieve a transmission ratio of 1:2, 1:3, 1:4, or 1:5.

[0020] Through the above technical solution, the present invention has achieved the following beneficial effects:

[0021] Achieving synchronous deflection: Synchronous deflection is achieved through a rigid linkage mechanism, fundamentally solving the problems of wire rope jumping out of the groove and biting against the pulley groove edge;

[0022] Achieving reliable limiting involves two aspects: firstly, moving away from the limit, when the foldable steel belt mechanism extends to its limit and tends to straighten, it forms an almost straight rigid rod, preventing the movable pulley group from moving further away; secondly, moving closer to the limit, when the foldable steel belt mechanism folds to its limit and tends to overlap, the long and short connecting plates abut against each other, forming a rigid support structure, preventing the movable pulley group from moving further closer.

[0023] Limit protection: The long and short connecting plate backstop blocks are used to limit the extreme rotation range of the foldable steel belt mechanism, ensuring that it reciprocates between far from the limit and near the limit.

[0024] Achieving structural integration: The compact structure and integrated functions significantly improve the safety and reliability of the overhead contact line compensation system and extend its service life. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some examples of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention (transmission ratio 1:3).

[0027] Figure 2 for Figure 1 The main view.

[0028] Figure 3 This is a schematic diagram of the foldable steel strip mechanism in its extended and limited state.

[0029] Figure 4 This is a schematic diagram of the foldable steel strip mechanism in its folded and limited state.

[0030] Explanation of reference numerals in the attached drawings: 100 Fixed pulley block, 101 Fixed pulley fixing plate, 111 First linkage pulley shaft, 121 Fixed side linkage wheel, 131 First fixed pulley, 200 Movable pulley block, 201 Movable pulley fixing plate, 211 Second linkage pulley shaft, 221 Movable side linkage wheel, 301 Compensating rope, 302 Wedge clamp, 5 Foldable steel belt mechanism, 511 Long connecting plate, 512 First connecting end, 513 U-shaped ear plate, 514 First turning part, 515 First hinge end, 521 Short connecting plate, 522 Second connecting end, 523 Second turning part, 525 Second hinge end, 531 Connecting plate rivet, 551 Spacer bolt assembly, 901 Long connecting plate backstop block, 902 Short connecting plate backstop block. Detailed Implementation

[0031] To make the technical solution, technical features and beneficial effects of this utility model clearer and more accurate, the terms "top surface", "side surface", "both sides", "located side", "left side", "right side", "vertical", "horizontal", "closer", "far from", "above", "end", etc., used to indicate the orientation or positional relationship shown in the drawings are the same as those shown in the drawings. The use of these terms is only for the purpose of making this utility model more easy to understand and should not be construed as a limitation of this utility model.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. This embodiment uses a transmission ratio of 1:3 as an example, but the scope of protection of the present invention is not limited thereto.

[0033] The following is an example:

[0034] like Figure 1 and Figure 2 The diagram shows a linkage limiting type contact network compensation pulley block with a transmission ratio of 1:3. It includes a fixed pulley block 100, a movable pulley block 200, a compensation rope 301, a wedge-shaped clamp 302 for fixing the end of the compensation rope 301, and two sets of symmetrically arranged foldable steel strip mechanisms 5.

[0035] In this embodiment, the fixed pulley group 100 includes a fixed pulley fixing plate 101 and two pulleys mounted thereon. The pulley closest to the movable pulley group 200 in the fixed pulley group 100 is the fixed-side linkage wheel 121, whose pulley axle is the first linkage pulley axle 111. The pulley furthest from the movable pulley group 200 is the first fixed pulley 131.

[0036] The pulley closest to the fixed pulley group 100 in the movable pulley group 200 is the movable side linkage wheel 221, and its pulley axle is the second linkage pulley axle 211. In this embodiment, the movable pulley group 200 includes a movable pulley fixing plate 201 and a pulley mounted thereon, which is the movable side linkage wheel 221, and is mounted via the second linkage pulley axle 211.

[0037] Two sets of symmetrically arranged foldable steel belt mechanisms 5 are connected between the first linkage pulley shaft 111 and the second linkage pulley shaft 211.

[0038] The foldable steel strip mechanism 5 includes a long connecting plate 511, a short connecting plate 521, and connecting plate rivets 531.

[0039] The long connecting plate 511 has a first connecting end 512 at one end and a first hinge end 515 at the other end. A first turning part 514 is provided between the first connecting end 512 and the first hinge end 515. A U-shaped earring plate 513 is provided near the first hinge end 515. The short connecting plate 521 has a second connecting end 522 at one end and a second hinge end 525 at the other end. A second turning part 523 is provided between the second connecting end 522 and the second hinge end 525.

[0040] The first connecting end 512 of the long connecting plate 511 is connected to the end of the first linkage pulley shaft 111 via an internal thread, and the other end is hinged to the second hinge end 525 of the short connecting plate 521 and the connecting plate rivet 531 via the first hinge end 515; the second connecting end 522 of the short connecting plate 521 is connected to the end of the second linkage pulley shaft 211 via an internal thread.

[0041] The long connecting plate 511 is provided with the first turning part 514, and the short connecting plate 521 is provided with the second turning part 523, for avoiding related components.

[0042] The U-shaped earring plates 513 of the two sets of foldable steel belt mechanisms 5 are fixedly connected by a spacer bolt assembly 551 to form an integral rigid frame to ensure their synchronous movement and force transmission.

[0043] like Figure 3 and Figure 4As shown, the fixed pulley assembly 100 includes a fixed pulley fixing plate 101, and a long connecting plate backstop block 901 is provided on the top surface of the fixed pulley fixing plate 101, which is close to the first linkage pulley shaft 111 and avoids the side where the long connecting plate 511 reciprocates; the movable pulley assembly 200 includes a movable pulley fixing plate 201, and two short connecting plate backstop blocks 902 are provided on the top surface of the movable pulley fixing plate 201, which are located on opposite sides of the second linkage pulley shaft 211.

[0044] When the foldable steel strip mechanism 5 is extended or folded to its limit, the side of the first connecting end 512 of the long connecting plate 511 abuts against the long connecting plate anti-reverse block 901; when the foldable steel strip mechanism 5 is extended to its limit, the top surface of the short connecting plate 521 abuts against the left side of the short connecting plate anti-reverse block 902; when the foldable steel strip mechanism 5 is folded to its limit, the top surface of the short connecting plate 521 abuts against the right side of the short connecting plate anti-reverse block 902.

[0045] The winding path of the compensating rope 301 is as follows: one end of the compensating rope 301 is fixed to the movable pulley fixing plate 201 with the wedge clamp 302, then passes around the fixed side linkage wheel 121 and the movable side linkage wheel 221 in sequence, and finally passes over the first fixed pulley 131 and goes down vertically.

[0046] The working principle is as follows:

[0047] When the fixed pulley block (100) or the movable pulley block (200) deflects due to foundation deformation or external interference, the deflection force is transmitted through the rigid frame of the foldable steel belt mechanism (5), causing the other pulley block to deflect completely synchronously, thereby avoiding misalignment and biting between the wire rope and the pulley groove.

[0048] When the compensation stroke reaches its limit, the long connecting plate 511 and the short connecting plate 521 extend or fold to form a rigid geometric structure, preventing the movable pulley group 200 from moving further away from or closer to the fixed pulley group 100, providing a purely mechanical hard limit; the long connecting plate backstop block 901 and the short connecting plate backstop block 902 limit the limit rotation range of the long connecting plate 511 and the short connecting plate 521 when they extend or fold, ensuring that the movable pulley group 200 can only move back and forth between moving away from the limit and moving closer to the limit, thereby achieving limit protection.

[0049] The above embodiments are merely used to illustrate the technical solution of this utility model, and are not intended to limit it. It is obvious to those skilled in the art that any equivalent substitution of the technical solution and technical features of this utility model without departing from the principle and basic concept of this utility model, as long as it adopts the basic concept of "connected to the adjacent pulley shaft of the movable pulley group and the fixed pulley group through a foldable mechanism", falls within the protection scope of this utility model.

Claims

1. A linkage-limiting contact wire compensation pulley system, comprising a fixed pulley system (100), a movable pulley system (200), a compensation rope (301), and a wedge-shaped clamp (302) for fixing the end of the compensation rope (301), characterized in that: The fixed pulley block (100) and the movable pulley block (200) are each equipped with at least one pulley; The pulley closest to the movable pulley group (200) in the fixed pulley group (100) is the fixed-side linkage pulley (121), and its pulley shaft is the first linkage pulley shaft (111). The pulley closest to the fixed pulley group (100) in the movable pulley group (200) is the movable side linkage pulley (221), and its pulley shaft is the second linkage pulley shaft (211). Two sets of symmetrically arranged foldable steel belt mechanisms (5) are connected between the first linkage pulley shaft (111) and the second linkage pulley shaft (211). The two sets of foldable steel belt mechanisms (5) are connected by a spacer bolt assembly (551) to form a rigid support structure to ensure their synchronous movement and force transmission. The fixed pulley assembly (100) includes a fixed pulley fixing plate (101), and a long connecting plate anti-reverse block (901) is provided on the top surface of the fixed pulley fixing plate (101). The movable pulley assembly (200) includes a movable pulley fixing plate (201), and two short connecting plate anti-reverse blocks (902) are provided on the top surface of the movable pulley fixing plate (201). Both the long connecting plate anti-reverse block (901) and the short connecting plate anti-reverse block (902) are used to limit the extreme rotation range of the foldable steel belt mechanism (5). One end of the compensating rope (301) is connected to a pulley block fixing plate through the wedge clamp (302), and the other end passes around the corresponding pulleys on the fixed pulley block (100) and the movable pulley block (200) in sequence, and descends vertically from the pulley in the fixed pulley block (100) that is farthest from the movable pulley block (200).

2. The linkage limit type overhead line system compensation pulley set according to claim 1, characterized in that: The foldable steel strip mechanism (5) includes a long connecting plate (511), a short connecting plate (521), and connecting plate rivets (531). The long connecting plate (511) has a first connecting end (512) at one end and a first hinge end (515) at the other end. A first turning part (514) is provided between the first connecting end (512) and the first hinge end (515). A U-shaped earring plate (513) is provided near the first hinge end (515). The short connecting plate (521) has a second connecting end (522) at one end and a second hinge end (525) at the other end, and a second turning part (523) is provided between the second connecting end (522) and the second hinge end (525). The long connecting plate (511) and the short connecting plate (521) are hinged together by the first hinge end (515), the second hinge end (525) and the connecting plate rivet (531).

3. The linkage and limit contact system catenary compensation pulley assembly of claim 2, wherein: Thick plates are welded to the ends of the first connecting end (512) and the second connecting end (522). The first connecting end (512) and the second connecting end (522) are internal threaded holes, which are threaded to the ends of the first linkage pulley shaft (111) and the second linkage pulley shaft (211), respectively.

4. The linkage limit type overhead line system compensation pulley set according to claim 1 or 2, characterized in that: The long connecting plate anti-reverse block (901) is located near the first linkage pulley shaft (111) and away from the side where the long connecting plate (511) reciprocates, and is used to contact the side of the first connecting end (512) of the long connecting plate (511) when the foldable steel belt mechanism (5) is in the extreme position. The two short connecting plate backstops (902) are respectively disposed on opposite sides of the second linkage pulley shaft (211) and are used to contact the top surface of the short connecting plate (521) when the foldable steel belt mechanism (5) is in the extreme position.

5. The linkage and limit contact system of claim 1, wherein: The number, size, and arrangement of pulleys in the fixed pulley block (100) and the movable pulley block (200) are matched with the winding method of the compensating rope (301) to achieve a transmission ratio of 1:2, 1:3, 1:4, or 1:5.

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