Tension compensation device for flexible contact network of rail transit

Abstract

The utility model provides a tension compensation device for a flexible contact network of rail transit, which belongs to the field of electrified railway equipment, and comprises a stand column, a pull rope and a balance weight, the stand column is provided with a lever assembly, the lever assembly comprises a mounting seat and a first rod body, the mounting seat is horizontally arranged on the stand column, and a first rotating seat is rotatably arranged on the top surface of the mounting seat; a rotating shaft of the first rod body is horizontally arranged, the first end of the first rod body is in rotating connection with the first rotating base, a first force bearing point is movably arranged on a rod body of the first rod body, the pull rope is connected with the first force bearing point, and the balance weight is connected with the second end of the first rod body through a connecting rope. The length from the first end of the first rod body to the second end of the first rod body is larger than the length from the first force bearing point to the first end of the first rod body. According to the utility model, through the composite lever structure consisting of the first rod body and the second rod body, the tension compensation of the pull rope can be realized by using the balance weight with relatively light weight, so that the working difficulty of mounting and maintaining the tension compensation device of the overhead line system is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrified railway equipment, in particular to a track traffic flexible contact net tension compensation device. BACKGROUND

[0002] In the power supply contact net of electrified railway, the overhead load cable and contact wire are always in a tense state to ensure the normal work of the contact net under any weather condition, but the length of the load cable and contact wire changes due to the change of ambient temperature, resulting in the change of tension, and the tension compensation device for compensating the tension of the load cable and contact wire is widely used in the prior art power supply contact net.

[0003] At present, the widely used tension compensation device in the contact net of electrified railway is a compensation device composed of a fixed pulley and a plummet, the plummet automatically adjusts the tension of the wire under the action of its own gravity with the change of air temperature, and the weight of the plummet pulls the wire to move between the pulley set to maintain the basic constancy of the tension of the wire. This compensation has the advantages of simple structure and stable tension. The gravity of the plummet is used to maintain the constancy of the tension, and the number of installed plungers directly affects the overall tension, but since a single plummet weighs more than 25 kg, it is inconvenient to install and maintain, especially in the environment of overhead contact net. SUMMARY

[0004] The utility model aims at providing a track traffic flexible contact net tension compensation device which can reduce the work difficulty of installing and maintaining the contact net tension compensation device.

[0005] The embodiment of the utility model realizes the following technical scheme: a track traffic flexible contact net tension compensation device, comprising a stand, a pull rope and a plummet, the stand is provided with a lever assembly, the lever assembly comprises a mounting seat and a first rod body, the mounting seat is horizontally arranged on the stand, a first rotating seat is arranged on the top surface of the mounting seat, the rotating shaft of the first rod body is horizontally arranged, the first end of the first rod body is connected with the first rotating seat, a first stress point is arranged on the rod body of the first rod body, the pull rope is connected with the first stress point, the plummet is connected with the second end of the first rod body through a connecting rope, and the length from the first end of the first rod body to the second end of the first rod body is greater than the length from the first stress point to the first end of the first rod body.

[0006] Further, a sliding groove is arranged on the length direction of the first rod body, a second rod body is further arranged on the mounting seat in a rotating mode, the rotating shaft of the second rod body is parallel to the rotating shaft of the first rod body, the first end of the second rod body is arranged in the sliding groove in a sliding mode, a second stress point is arranged on the second rod body, and the pull rope is connected with the second stress point.

[0007] Further, the first end of the second rod body is rotationally provided with a roller, which rolls in the sliding groove.

[0008] Further, the second end of the first rod body is threadedly provided with two limiting blocks, and a sliding sleeve is arranged between the two limiting blocks, the sliding sleeve being sleeved on the first rod body, and the plummet being connected to the sliding sleeve through a connecting rope.

[0009] Further, the first end of the first rod body is provided with a ratchet wheel, the rotation axis of the ratchet wheel coinciding with the rotation axis of the first rod body, and a pawl being arranged on the mounting seat and being clamped with the ratchet wheel.

[0010] Further, the second rod body comprises a first metal plate and a second metal plate, the first metal plate and the second metal plate being riveted, and the thermal expansion coefficient of the first metal plate and the thermal expansion coefficient of the second metal plate being different.

[0011] Further, a plurality of bolt holes are formed in the second rod body, an end of the pulling rope is provided with a connecting portion, a connecting hole is formed in the connecting portion, a plug rod is arranged in the connecting hole, and the plug rod is inserted into the bolt hole.

[0012] The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0013] 1. The utility model discloses a composite lever structure composed of a first rod body and a second rod body, and the tension compensation of the pulling rope can be realized by using a plummet with small weight, so that the working difficulty of installing and maintaining the overhead line tension compensation device is facilitated.

[0014] 2. The utility model discloses that two metal sheets with different thermal expansion coefficients are riveted on the second rod body, the second rod body is bent when the ambient temperature changes, the second rod body is pushed to move in the sliding groove, the power arm length of the first rod body is changed, and the automatic adjustment of the tension is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and the other related drawings can be obtained by the drawings without the creative labor for the ordinary skilled in the art.

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2It is the structure schematic view of mounting seat in the utility model;

[0018] Figure 3 It is the structure schematic view of second rod body in the utility model;

[0019] Icon: 1, stand; 11, pull rope; 12, plummet; 13, fixed pulley; 2, mounting seat; 21, first rotating seat; 211, pawl; 22, first rod body; 221, ratchet wheel; 222, sliding groove; 223, limiting block; 224, sliding sleeve; 23, second rotating seat; 231, second rod body; 232, roller; 233, bolt hole; 234, connecting part; 235, plug rod; 236, first metal plate; 237, second metal plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0022] EMBODIMENT

[0023] The following will be further described with specific embodiments, referring to Figures 1-3 The utility model is a kind of rail transit flexible contact net tension compensation device, referring to Figure 1 , including stand 1, pull rope 11 and plummet 12. The top end of stand 1 is rotationally provided with fixed pulley 13, and pull rope 11 is wound on fixed pulley 13.

[0024] Referring to Figure 2The rod body of the stand 1 is fixedly provided with a mounting seat 2, which is horizontally arranged. The mounting seat 2 is provided with a lever assembly. Specifically, the top surface of the mounting seat 2 is fixedly provided with a first rotating seat 21, which is provided with a rotating shaft. The first rotating seat 21 is rotatably provided with a first rod body 22, and the first end of the first rod body 22 rotates around the rotating shaft. The first end of the first rod body 22 is provided with a ratchet wheel 221, and the rotating shaft of the ratchet wheel 221 coincides with the rotating shaft of the first end of the first rod. The first rotating seat 21 is rotatably provided with a pawl 211, which is connected with the ratchet wheel 221. When the weight of the plummet 12 is relatively light, the pawl 211 cooperates with the ratchet wheel 221 to limit the rotation of the second end of the first rod body 22 towards the direction close to the stand 1.

[0025] With reference to Figure 2 The first rod body 22 is provided with a sliding groove 222 extending along the length direction of the first rod body 22. The second end of the first rod body 22 is provided with a thread, and the second end of the first rod body 22 is threadedly connected with two limiting blocks 223. The two limiting blocks 223 are provided with a sliding sleeve 224 therebetween, and the sliding sleeve 224 is provided with a through hole for the first rod body 22 to pass through. The two ends of the sliding sleeve 224 are respectively abutted with the two limiting blocks 223. The length of the power arm is controlled by adjusting the distance between the two limiting blocks 223 and the first end of the first rod body 22. One end of the pull rope 11 is fixedly connected with the sliding sleeve 224, and the other end of the pull rope 11 is connected with the plummet 12. In the embodiment, the material of the first rod body 22 is a high-strength material.

[0026] With reference to Figure 2 The mounting seat 2 is further fixedly provided with a second rotating seat 23, and the straight line between the second rotating seat 23 and the first rotating seat 21 is located in the rotating plane of the first rod body 22. The second rotating seat 23 is provided with a rotating shaft, and the rotating shaft of the second rotating seat 23 is parallel to the rotating shaft of the first rotating seat 21. The second rotating seat 23 is rotatably provided with a second rod body 231, and the first end of the second rod body 231 is a free end. The first end of the second rod body 231 is rotatably provided with a roller 232, and the roller 232 is rotatably arranged in the sliding groove 222. The roller 232 is the first force point of the second rod body 231 acting on the first rod body 22.

[0027] With reference to Figure 2 and Figure 3The second end of the second rod body 231 is rotationally arranged on the second rotation seat 23. A plurality of insertion holes 233 are equidistantly arranged on the second rod body 231 along the length direction of the second rod body 231. A connecting portion 234 is further arranged on the second rod body 231. One end of the connecting portion 234 is fixedly connected with the end of the pull rope 11. A connecting hole is arranged on the connecting portion 234. The connecting portion 234 is sleeved on the second rod body 231, and the connecting hole is opposite to the insertion hole 233. An insertion rod 235 is arranged in the connecting hole. The insertion rod 235 is sequentially arranged in the connecting hole and the insertion hole 233, and the connecting portion 234 is fixedly connected with the second rod body 231. The connecting position of the connecting portion 234 and the second rod body 231 is the second force point in the second rod body 231. The first rod body 22, the second rod body 231 and the mounting seat 2 form a compound lever structure. The length of the power arm of the plummet 12 in the lever structure is greater than the length of the resistance arm of the pull rope 11, so that the tension compensation effect of the pull rope 11 can be realized by the plummet 12 with smaller weight.

[0028] With reference to Figure 3 The second rod body 231 comprises a first metal plate 236 and a second metal plate 237. The first metal plate 236 and the second metal plate 237 are arranged in parallel. The first metal plate 236 and the second metal plate 237 are riveted. The gap between the first metal plate 236 and the second metal plate 237 is perpendicular to the rotation plane of the second rod body 231. The expansion coefficients of the first metal plate 236 and the second metal plate 237 are different. When the ambient temperature rises, the expansion degrees of the first metal plate 236 and the second metal plate 237 are different, so that the second rod body 231 is bent. The first end of the second rod body 231 moves towards the end close to the rotation shaft of the first rod body 22. When the ambient temperature drops, the second rod body 231 is bent towards the other side. The first end of the second rod body 231 moves towards the end away from the rotation shaft of the first rod body 22.

[0029] The working process of the embodiment is as follows: the end of the pull rope 11 is connected with the connecting portion 234. The connecting portion 234 is connected with the second rod body 231 through the insertion rod 235. The force of the pull rope 11 acts on the second force point of the second rod body 231.

[0030] The plummet 12 is hung on the second end of the first rod 22 by the connecting rope. The position of the whole sliding sleeve 224 on the second end of the first rod 22 changes the first power arm length in the lever structure of the first rod 22. The farther the distance between the sliding sleeve 224 and the first end of the first rod 22, the greater the length of the first power arm. The rolling of the roller 232 in the sliding groove 222 changes the first resistance arm length in the lever structure of the first rod 22. The greater the length of the first resistance arm, the smaller the weight of the plummet 12 required under the same tension compensation. The greater the distance of the rolling to the second end of the first rod 22, the greater the length of the first resistance arm. Since the first power arm length is greater than the first resistance arm length, the gravity of the plummet 12 is smaller than the force exerted by the roller 232 on the first rod 22.

[0031] In the second rod 231, the length of the second rod 231 is the second power arm length. The distance between the insertion rod 235 and the rotation axis of the second rod 231 is the second resistance arm length. Since the second power arm length is greater than the second resistance arm length, the force exerted on the roller 232 is smaller than the force exerted by the pulling rope 11 on the insertion rod 235.

[0032] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rail transit flexible catenary tension compensation device, characterized in that: The utility model provides a kind of safety device for building, including stand (1), pull rope (11) and plummet (12), the stand (1) is provided with lever assembly, the lever assembly includes mounting seat (2) and first rod body (22), the mounting seat (2) is horizontally arranged on the stand (1), the top surface of the mounting seat (2) is rotatably provided with first rotating seat (21), the rotating shaft of the first rod body (22) is horizontally arranged, the first end of the first rod body (22) is connected with the first rotating seat (21), first stress point is movably arranged on the rod body of the first rod body (22), the pull rope (11) is connected with the first stress point, the plummet (12) is connected with the second end of the first rod body (22) by connecting rope, the length of the first end of the first rod body (22) to the second end of the first rod body (22) is greater than the length of the first stress point to the first end of the first rod body (22).

2. The flexible catenary tension compensation device of claim 1, wherein: The first rod body (22) is provided with a sliding groove (222) along the length direction of the first rod body (22), and the mounting seat (2) is further rotatably provided with a second rod body (231), the rotating shaft of the second rod body (231) is parallel to the rotating shaft of the first rod body (22), the first end of the second rod body (231) is slidingly arranged in the sliding groove (222), and the second rod body (231) is provided with a second stress point, and the pull rope (11) is connected with the second stress point.

3. The flexible catenary tension compensation device of claim 2, wherein: The first end of the second rod body (231) is rotatably provided with a roller (232), and the roller (232) rolls in the sliding groove (222).

4. The rail transit flexible contact net tension compensation device according to claim 1, characterized in that: The second end of the first rod body (22) is threadedly provided with two limiting blocks (223), and a sliding sleeve (224) is arranged between the two limiting blocks (223), the sliding sleeve (224) is sleeved on the first rod body (22), and the plummet (12) is connected to the sliding sleeve (224) by a connecting rope.

5. The rail transit flexible contact net tension compensation device according to claim 1, characterized in that: The first end of the first rod body (22) is provided with a ratchet wheel (221), the rotating shaft of the ratchet wheel (221) coincides with the rotating shaft of the first rod body (22), the mounting seat (2) is provided with a pawl (211), and the pawl (211) is connected with the ratchet wheel (221).

6. The flexible catenary tension compensation device of claim 2, wherein: The second rod body (231) includes a first metal plate (236) and a second metal plate (237), the first metal plate (236) and the second metal plate (237) are riveted, and the thermal expansion coefficients of the first metal plate (236) and the second metal plate (237) are not equal.

7. The flexible catenary tension compensation device of claim 2, wherein: A plurality of bolt holes (233) are formed in the second rod body (231), an end of the pull rope (11) is provided with a connecting portion (234), a connecting hole is formed in the connecting portion (234), a plug rod (235) is arranged in the connecting hole, and the plug rod (235) is inserted into the bolt hole (233).

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