A rigid-flexible transition structure for contact network

Abstract

The present invention relates to the field of rail transit contact network, in particular to a contact network rigid-flexible transition structure, and discloses a contact network rigid-flexible transition structure, comprising a rigidly suspended rigid-flexible transition body, at one end of which transition segments which are sequentially connected together by rigidity and used to clamp a contact line are suspended, and the rigidity of each transition segment gradually decreases from one side of the rigid-flexible transition body; since rigidly connected transition segments with decreasing rigidity are sequentially suspended at the front end of a traditional rigid-flexible transition body, an extension of the rigid-flexible transition body is achieved, and each transition segment is independent without considering the size specifications of the entire transition structure, and a longer distance of rigid-flexible change can be easily achieved by changing the rigidity of the transition segment itself, thereby making the rigid-flexible transition smoother, and effectively reducing or eliminating the problems of hard points, arcing, etc. in high-speed operation of trains.

Description

Technical Field

[0001] The invention relates to the field of rail transit contact network, and in particular to a rigid-flexible transition structure of a contact network. Background Art

[0002] Electrified railways and urban rail transit generally use flexible contact networks on the ground or elevated, and rigid contact networks are generally used in underground sections. As a continuous and uninterrupted power supply equipment, the contact network must be equipped with a rigid-flexible transition device at the junction of the rigid contact network and the flexible contact network to ensure a smooth transition and stable current collection quality. At present, the commonly used rigid-flexible transition device in China is to achieve rigid-flexible transition through a slotted bus with gradually changing stiffness. The operating speed does not exceed 160km / h. Hard points, arcing and other problems may occur during the actual operation of the train, which seriously limits the safe operating speed of the train. Therefore, it is of great significance to develop a rigid-flexible transition device with smooth transition and stable current collection in the transition area, which can meet the high-speed operation of the train, in order to improve the running speed of the train.

[0003] For example, patent 200620078307.4 discloses an overhead contact network with rigid-flexible transition, which achieves the rigid-flexible transition requirement by opening a group of grooves of different depths on the busbar body to achieve a decreasing rigidity change. However, this method achieves a short rigid-flexible transition distance, and cannot achieve the purpose of eliminating or reducing hard points, arcing and other phenomena in actual operation, and it cannot adapt to higher-speed rigid contact networks. In order to eliminate or reduce hard points, arcing and other phenomena, it is necessary to increase the number of grooves on the busbar body and the busbar body specifications to meet the requirements of sufficient length and rigidity gradient, which will cause the busbar to be too heavy and the processing difficulty will also increase.

[0004] Another example is a flexible bus rigid-flexible transition device disclosed in patent 201420580042.2, which has a group of spring plates arranged in the bus body, and a group of wire clamp groups arranged in turn on the spring plates. The stiffness change of the position of the wire clamp group is changed by changing the number of stacked spring plates. If a smoother rigid-flexible transition is required, the longest spring plate needs to have a sufficient length, and a sufficient number of spring plates are required to provide a step-by-step gradual effect. The structure is complex and not conducive to engineering implementation. Due to its length limitation, it cannot eliminate or reduce hard points, arcing and other phenomena, and cannot meet the higher speed operation requirements of trains. Summary of the invention

[0005] In order to solve the problem that the rigid-flexible transition distance is too short in the prior art, and the problems of hard points and arcing in high-speed train operation cannot be eliminated or reduced, the technical solution adopted by the present invention is:

[0006] A contact network rigid-flexible transition structure includes a rigidly suspended rigid-flexible transition body, at one end of which are suspended transition sections which are rigidly connected in sequence and used to clamp the contact line, and the rigidity of each transition section gradually decreases from one side of the rigid-flexible transition body.

[0007] Furthermore, each of the transition sections is suspended rigidly or flexibly.

[0008] Furthermore, it includes a suspension rope for realizing flexible suspension of each transition section.

[0009] Furthermore, it includes a cantilever for realizing the rigid suspension of each transition section.

[0010] Furthermore, the transition section includes a clamping portion and a hanging portion, the hanging portion is used to connect the suspension rope, and the clamping portion is used to clamp the contact line. The hanging portion heights of each transition section are different, and the smaller the height of the hanging portion, the smaller the stiffness of the transition section.

[0011] Furthermore, the clamping portion includes a pair of clamping plates.

[0012] Furthermore, the transition section upper suspension portion has a uniform height.

[0013] Furthermore, the upper suspension portion of the transition section gradually decreases in the direction away from the rigid-flexible transition body, and the height of the connecting point of the upper suspension portions of two adjacent transition sections is basically the same.

[0014] Furthermore, one of the clamping plates and the hanging portion are integrally formed.

[0015] Furthermore, the clamping plate connects two adjacent transition sections.

[0016] Furthermore, the pair of clamping plates are interconnected and clamped on the hanging portion.

[0017] Furthermore, the clamping plate connects two adjacent transition sections.

[0018] Furthermore, a connecting plate is provided between two adjacent suspension parts for rigidly connecting two adjacent transition sections.

[0019] Furthermore, the cross section of the suspension portion is U-shaped, and each of the clamping plates is integral with the suspension portion.

[0020] Furthermore, a connecting plate is provided between two adjacent suspension parts for connecting two adjacent transition sections.

[0021] Furthermore, a hanging ring connected to the hanging rope is provided on the hanging part.

[0022] Furthermore, a group of grooves arranged at intervals and with different depths are opened on the rigid-flexible transition body near one end of the transition section, and the depth of the grooves gradually decreases from one side of the transition section.

[0023] Furthermore, the upper suspension portion of the transition section adjacent to the rigid-flexible transition body is rigidly connected to the rigid-flexible transition body.

[0024] Furthermore, the suspension parts on two adjacent transition sections are rigidly connected.

[0025] The present invention provides a contact network rigid-flexible transition structure. Since rigidly connected transition sections with decreasing rigidity are suspended in sequence at the front end of a traditional rigid-flexible transition body, the extension of the rigid-flexible transition body is achieved, and each transition section is independent without considering the size specifications of the entire transition structure. By changing the rigidity of the transition section itself, it is easy to achieve rigid-flexible changes over a longer distance, thereby making the rigid-flexible transition smoother, and effectively reducing or eliminating problems such as hard points and arcing during high-speed operation of trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of transition section embodiment 1;

[0028] Figure 3 It is a structural schematic diagram of transition section embodiment 2;

[0029] Figure 4 It is a structural schematic diagram of transition section embodiment 3;

[0030] Figure 5 It is a structural schematic diagram of transition section embodiment 4;

[0031] Figure 6 It is a schematic diagram of the rigid suspension structure of the transition section;

[0032] Figure 7 Schematic diagram of the rigid-flexible transition body structure. DETAILED DESCRIPTION

[0033] In order to better understand the inventive concept of the present invention, the rigid-flexible transition structure of the contact network of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1The rigid-flexible transition structure shown includes a rigid-flexible transition body 1, which is rigidly fixed in the contact network system, mainly by being fixed to the contact network system by a cantilever. Transition sections 2 are connected in sequence at one end of the rigid-flexible transition body 1. In order to keep the contact line on each transition section 2 horizontal, each transition section 2 needs to be suspended in the contact network system due to the long distance of the extended transition section 2. The suspension method can be selected as flexible suspension or rigid suspension. The flexible suspension mainly positions and suspends each transition section 2 in the contact network system through a suspension rope 3, and the rigid suspension mainly positions and suspends each transition section 2 through a cantilever like the rigid-flexible transition body 1. This group of transition sections 2 forms an extension of the rigid-flexible transition body 1, and the rigid-flexible transition body 1 and the adjacent transition section 2 and between two adjacent transition sections are rigidly connected, and the rigidity of each transition section 2 gradually decreases from one side of the rigid-flexible transition body 1.

[0035] In the embodiment given here, the change of the stiffness of each transition section 2 is achieved by changing the cross-sectional size of each transition section 2, that is, the smaller the cross-sectional size, the smaller the stiffness. Of course, it is not excluded that the change of the stiffness of each transition section 2 is achieved by other means, such as using different materials to make the transition section so as to achieve different stiffness of each transition section. And the way to achieve the gradual decrease of the stiffness of each transition section 2 includes that the overall stiffness of each transition section 2 remains unchanged, the stiffness of two adjacent transition sections 2 is different, or the stiffness of each transition section 2 as a whole changes linearly, and the stiffness of the joint of two adjacent transition sections 2 remains basically the same. The specific structure is further described in detail with reference to the accompanying drawings of the embodiment.

[0036] The embodiment given in the figure is used to specifically explain how to change the stiffness of each transition section 2. The transition section 2 basically includes a hanging portion 2-2 and a clamping portion 2-1, wherein the hanging portion 2-2 is used to connect the suspension rope 3, and the clamping portion 2-1 is used to clamp the contact line. The structure and specifications of the clamping portion 2-1 of each transition section will basically not change. The stiffness of the entire transition section 2 is changed by changing the height of the hanging portion 2-2 (the smaller the height of the hanging portion 2-2, the smaller the stiffness).

[0037] The specific structure of the transition section 2 has the following embodiments: In order to show the structure more clearly, the length ratio relationship of the structural parts in the drawings has been adjusted and abbreviated accordingly, and the actual length ratio relationship is much larger than the ratio relationship in the figure.

[0038] like Figure 2The clamping portion 2-1 shown includes a pair of clamping plates 2-2-1, one of which is integral with the suspension portion 2-2, and the two clamping plates 2-2-1 are connected by bolts to fix the contact line. Under this structure, two adjacent transition sections 2 are rigidly connected by the same clamping plate 2-2-1. In addition, when the two adjacent transition sections 2 are rigidly connected, the independently arranged clamping plates 2-2-1 are at least a whole piece at the connection of the two adjacent clamping plates 2-2-1. For convenience of setting, this group of transition sections 2 can use a whole piece of clamping plate 2-2-1.

[0039] like Figure 3 The clamping part 2-1 shown includes two independent clamping plates 2-2-1, which are clamped and fixed on the suspension part 2-2 by bolt connection and are used to clamp the contact line. Under this structure, two adjacent suspension parts 2-2 are rigidly connected by the same group of clamping plates 2-2-1, so that the two transition sections 2 are rigidly connected. Of course, when the clamping plates 2-2-1 are used to achieve rigid connection, the group of clamping plates 2-2-1 needs to be of sufficient length so that the connection of the transition section 2 meets the sufficient rigid connection requirements, or when the clamping plates 2-2-1 are shorter as shown in the figure, a connecting plate 4 is set at the connection of two adjacent transition sections 2 as a rigid connector to strengthen the rigid connection.

[0040] like Figure 4 The suspension part 2-2 is shown in U-shape, and the clamping part 2-1 includes two clamping plates 2-2-1, which are integral with the suspension part 2-2 and used to clamp the contact line. In this structure, a connecting plate 4 is arranged in the suspension part 2-2 to connect two adjacent suspension parts 2-2 together through bolt connection, so as to realize the rigid connection of two adjacent transition sections 2.

[0041] In the above three embodiments, the height of the suspension portion 2 - 2 on the same transition section 2 remains consistent, that is, the stiffness of the entire transition section 2 remains consistent.

[0042] Of course, in order to provide a smoother rigid-flexible transition, the above embodiment can also be used as follows Figure 5 As shown, the height of the suspension portion 2-2 on each transition section 2 is gradually changed. Even if each suspension portion 2-2 is gradually lowered to form a sloped setting in the direction away from the rigid-flexible transition body 1, it should be noted that the height of the suspension portion 2-2 at the junction of two adjacent transition sections 2 needs to be consistent (since the dimensions are difficult to be exactly the same, the height must basically be kept consistent). In this way, after the transition sections 2 are rigidly connected together, the group of spliced ​​suspension portions 2-2 are arranged in an inclined manner as a whole, that is, they are gradually lowered starting from one end of the rigid transition body 1.

[0043] In the above embodiments, each transition section 2 is positioned by a flexible suspension method of the suspension rope 3. Of course, it can also be positioned by a rigid suspension method (the cantilever 3a is positioned as shown in FIG. Figure 6Position each transition section 2 in the manner shown)

[0044] In the above three embodiments, the transition section 2 adjacent to the rigid-flexible transition body 1 is rigidly connected to the rigid-flexible transition body 1 through the suspension portion 2-2. In order to ensure the stability of the rigid structure of the connection between the rigid-flexible transition body 1 and the transition section 2 adjacent thereto, a reinforcing pad 5 is provided at the rigid connection portion between the rigid-flexible transition body 1 and the transition section 2 adjacent thereto.

[0045] In the above embodiment, in order to facilitate the connection of the suspension rope 3, a ring 2-3 is further provided on the suspension part 2-2 for connecting the suspension rope.

[0046] The rigid-flexible transition body 1 in the rigid-flexible transition structure is as follows Figure 7 As shown, a group of grooves 1 - 1 arranged at intervals and with different depths are provided at one end of the transition section 2 , and the depth of the grooves 1 - 1 gradually decreases from one side of the transition section 2 .

Claims

1. A contact network rigid-flexible transition structure, comprising a rigidly suspended rigid-flexible transition body (1), characterized in that: A group of transition sections (2) for clamping the contact line are suspended at one end of the rigid-flexible transition body (1), which are sequentially connected together by rigidity, and the rigidity of each transition section (2) gradually decreases from one side of the rigid-flexible transition body (1).

2. The contact network rigid-flexible transition structure according to claim 1, characterized in that: Each of the transition sections (2) is suspended rigidly or flexibly.

3. The contact network rigid-flexible transition structure according to claim 2, characterized in that: It comprises a suspension rope (3) for realizing flexible suspension of each transition section (2).

4. A contact network rigid-flexible transition structure according to claim 2, characterized in that: It includes a cantilever (3a) for realizing the rigid suspension of each transition section (2).

5. A contact network rigid-flexible transition structure according to claim 1, 2, 3 or 4, characterized in that: The transition sections (2) have different cross-sections and the smaller the cross-section, the smaller the rigidity.

6. The contact network rigid-flexible transition structure according to claim 5, characterized in that: The transition section (2) comprises a clamping portion (2-1) and a hanging portion (2-2), the hanging portion (2-2) being used to connect a suspension rope (3), and the clamping portion (2-1) being used to clamp a contact line, the hanging portion (2-2) of each transition section (2) having a different height, and the smaller the height of the hanging portion (2-2), the smaller the stiffness of the transition section (2).

7. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The clamping portion (2-1) comprises a pair of clamping plates (2-2-1).

8. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The upper hanging portion (2-2) of the same transition section (2) has a uniform height.

9. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The upper suspension portion (2-2) of the same transition section (2) gradually decreases in a direction away from the rigid-flexible transition body (1), and the heights of the connecting parts of the upper suspension portions (2-2) of two adjacent transition sections (2) are substantially the same.

10. The contact network rigid-flexible transition structure according to claim 7, characterized in that: One of the clamping plates (2-2-1) and the hanging portion (2-2) are integrated into one body.

11. The contact network rigid-flexible transition structure according to claim 10, characterized in that: The clamping plate (2-2-1) rigidly connects two adjacent transition sections (2).

12. The contact network rigid-flexible transition structure according to claim 7, characterized in that: The pair of clamping plates (2-2-1) are interconnected and clamped and fixed on the hanging portion (2-2).

13. The contact network rigid-flexible transition structure according to claim 12, characterized in that: The clamping plate (2-2-1) is used to rigidly connect two adjacent transition sections (2).

14. The contact network rigid-flexible transition structure according to claim 12, characterized in that: A connecting plate (4) is provided between two adjacent suspension parts (2-2) for rigidly connecting two adjacent transition sections (2).

15. The contact network rigid-flexible transition structure according to claim 7, characterized in that: The cross section of the hanging portion (2-2) is U-shaped, and each of the clamping plates (2-2-1) is integral with the hanging portion (2-2).

16. The contact network rigid-flexible transition structure according to claim 15, characterized in that: A connecting plate (4) is provided between two adjacent suspension parts (2-2) for rigidly connecting two adjacent transition sections (2).

17. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The hanging portion (2-2) is provided with a hanging ring (2-3) connected to the hanging rope (3).

18. A contact network rigid-flexible transition structure according to claim 1, 2, 3 or 4, characterized in that: A group of grooves (1-1) arranged at intervals and having different depths are provided on the rigid-flexible transition body (1) at one end close to the transition section (2), and the depth of the grooves (1-1) gradually decreases from one side of the transition section (2).

19. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The upper suspension portion (2-2) of the transition section (2) adjacent to the rigid-flexible transition body (1) is rigidly connected to the rigid-flexible transition body (1).

20. The contact network rigid-flexible transition structure according to claim 6, characterized in that: The hanging parts (2-2) on two adjacent transition sections (2) are rigidly connected.

21. A contact network rigid-flexible transition structure according to claim 1, 2, 3 or 4, characterized in that: A pad (5) is provided at a rigid connection portion between the rigid-flexible transition body (1) and the adjacent transition section (2).

Images