Simplified overhead line system cantilever positioning device suitable for interior of ordinary-speed railway tunnel

By designing a simple and uniform contact net wrist arm positioning device suitable for ordinary railway tunnels, the pulley clamping of the load bearing cable and angle steel structure is used to solve the problems of difficulty in installation and weak short-circuit current resistance in low clearance tunnels, and compact fixed and efficient installation are achieved.

CN223266655UActive Publication Date: 2025-08-26CHINA STATE RAILWAY GRP CO LTD +1
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Patent Information

Application Number
CN202422617751.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2025-08-26
Estimated Expiration
2034-10-29

AI Technical Summary

Technical Problem

Traditional wrist arm positioning devices cannot be installed in low clearance tunnels, and the load bearing cable requires a large installation space and large contact resistance, and weak short-circuit current resistance.

Method used

A simple contact net wrist arm positioning device including pulley fixing plate, pulley, support insulator, upper base, lower base, first support rod and second support rod is designed. The load bearing cable is clamped by pulleys, and the angle steel structure and copper alloy pulley are used to improve compactness and short-circuit current resistance.

Benefits of technology

The compact fixation of the load bearing cable in low clearance tunnel is achieved, which solves the problem of installation difficulties and improves the device's short-circuit current resistance.

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Abstract

The utility model relates to a simplified overhead line system cantilever positioning device suitable for a common speed railway tunnel. The simplified overhead line system cantilever positioning device comprises a pulley fixing plate, a plurality of pulleys, a supporting insulator, an upper base, a lower base, a first supporting rod and a second supporting rod. A first connecting single lug and a second connecting single lug of the lower base are respectively fixed with a first upper connecting hole of the first supporting rod and a second upper connecting hole of the second supporting rod through connecting bolts; a first lower connecting hole of the first supporting rod and a second lower connecting hole of the second supporting rod are in bolted connection with a third connecting single lug and a fourth connecting single lug of the supporting insulator; a first connecting double-lug and a second connecting double-lug of the upper base are respectively connected with a fifth connecting single-lug and a sixth connecting single-lug of the supporting insulator through bolt pins; the tail end of the supporting insulator is connected with the pulley fixing plate through a plurality of pulley shafts, the pulleys are installed on the pulley shafts, and the carrier cable is clamped by the pulleys. The problem that a low-clearance tunnel carrier cable is difficult to install can be solved, and the short-circuit current resistance is high.
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Description

Technical Field

[0001] The utility model relates to the technical field of electrified railway contact network equipment, in particular to a simplified contact network wrist arm positioning device suitable for conventional railway tunnels. Background Art

[0002] In order to save civil engineering investment, the cross-sectional clearance of conventional electrified railway tunnels with lower speed grades is smaller, which compresses the installation space of the electrified railway contact network; and there are many types of tunnel cross-sections, which makes it inconvenient to adjust the contact network device.

[0003] The disadvantages of conventional arm positioning devices in tunnels are: (1) the load-bearing cables rely on the arm device to deflect to adapt to thermal expansion and contraction, which requires a large installation space; (2) the base adopts a hinged structure at many places, the parts are not tightly fitted, the contact resistance is large, and the short-circuit current ablation resistance is weak;

[0004] Therefore, in view of the above problems, the conventional wrist-arm positioning device cannot be installed and used in low-headroom tunnels, so a wrist-arm positioning device suitable for low-headroom tunnel spaces is needed. Summary of the Invention

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A simplified contact network arm positioning device suitable for use in conventional railway tunnels, comprising a pulley fixing plate, a plurality of pulleys, a support insulator, an upper base, a lower base, a first support rod, and a second support rod;

[0007] The first connecting ear and the second connecting ear of the lower base are respectively fixed to the first upper connecting hole of the first support rod and the second upper connecting hole of the second support rod by connecting bolts; the first lower connecting hole of the first support rod and the second lower connecting hole of the second support rod are bolted to the third connecting ear and the fourth connecting ear of the support insulator; the first connecting ears and the second connecting ears of the upper base are respectively connected to the fifth connecting ear and the sixth connecting ear of the support insulator by bolt pins;

[0008] The ends of the support insulators are connected to the pulley fixing plates through a plurality of pulley shafts, and the pulleys are mounted on the pulley shafts. A load-bearing cable passes between the pulleys, so that the load-bearing cable is clamped by the pulleys.

[0009] There are three pulleys and three corresponding pulley shafts. One end of the three pulley shafts is respectively installed on the first mounting hole, the second mounting hole, and the third mounting hole on the pulley fixing plate. The three mounting holes are arranged in an isosceles triangle, and the highest mounting hole is a long hole.

[0010] Threads are set on both sides of the pulley shaft, and the middle is an optical axis. The two sides of the optical axis pass through the mounting holes and are connected with the threads through nuts to achieve fixation.

[0011] The middle part of the support insulator is the insulator body. The outer insulating material of the insulator body is silicone rubber, and the inner insulating material is glass fiber.

[0012] The upper base adopts an angle steel structure, and a first fixed long hole and a second fixed long hole are provided at both ends.

[0013] The lower base adopts an angle steel structure, and a third fixed long hole and a fourth fixed long hole are provided at both ends.

[0014] The cross sections of the first support rod and the second support rod are rectangular structures.

[0015] The pulley fixing plate, the pulley shaft, the upper base, the lower base, the first support rod and the second support rod are made of stainless steel.

[0016] The first pulley, the second pulley and the third pulley are made of copper alloy.

[0017] The upper base is located above the lower base, and both are fixed on the tunnel wall.

[0018] The advantages and positive effects of the utility model are:

[0019] The utility model has a compact structure for fixing the catenary cables, can solve the problem of difficult installation of catenary cables in low-headroom tunnels, and has a strong short-circuit current resistance capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the installation of a simplified contact network arm positioning device suitable for conventional railway tunnels in the utility model;

[0022] Figure 2 This is a schematic diagram of the assembly of a simplified contact network arm positioning device suitable for conventional railway tunnels;

[0023] Figure 3 This is a schematic diagram of a pulley fixing plate of a simplified contact network arm positioning device suitable for use in conventional railway tunnels;

[0024] Figure 4This is a schematic diagram of the pulley of the simplified contact network arm positioning device suitable for conventional railway tunnels of the present invention;

[0025] Figure 5 This is a schematic diagram of the pulley shaft of the simplified contact network arm positioning device suitable for conventional railway tunnels of the present invention;

[0026] Figure 6 This is a schematic diagram of a support insulator of a simplified contact network arm positioning device suitable for use in conventional railway tunnels;

[0027] Figure 7 This is a schematic diagram of the upper base of the simplified contact network arm positioning device suitable for conventional railway tunnels;

[0028] Figure 8 This is a schematic diagram of the lower base of the simplified contact network arm positioning device suitable for conventional railway tunnels;

[0029] Figure 9 This is a schematic diagram of the first support rod of the simplified contact network arm positioning device suitable for use in conventional railway tunnels;

[0030] Figure 10 This is a schematic diagram of the second support rod of the simplified contact network arm positioning device suitable for conventional railway tunnels of the present invention. DETAILED DESCRIPTION

[0031] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below in an illustrative manner. However, all descriptions are for illustration only and should not be understood as limiting the present invention. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be arbitrarily combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein. In addition, in order to simplify the drawings, the same or similar technical features may be marked in only one place in the same drawing.

[0032] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] Example 1

[0034] like Figures 1 to 10 As shown, this embodiment provides a simplified contact network arm positioning device suitable for use in conventional railway tunnels, comprising a pulley fixing plate 1, a plurality of pulleys, a support insulator 6, an upper base 7, a lower base 8, a first support rod 9, and a second support rod 10;

[0035] In this embodiment, as shown in the figure, the upper base 7 adopts an angle steel structure, with a first connecting double ear 7-1 and a second connecting double ear 7-2 provided in the middle part, and a first fixing long hole 7-3 and a second fixing long hole 7-4 provided at both ends; the lower base 8 adopts an angle steel structure, with a first connecting single ear 8-1 and a second connecting single ear 8-2 provided in the middle part, and a third fixing long hole 8-3 and a fourth fixing long hole 8-4 provided at both ends; the first support rod 9 is provided with a first upper connecting hole 9-1 and a first lower connecting hole 9-2 at both ends, and the cross-section adopts a rectangular structure 9-3; similarly, the second support rod 10 is provided with a second upper connecting hole 10-1 and a second lower connecting hole 10-2 at both ends, and the cross-section also adopts a rectangular structure; a through hole 2-1 is provided in the middle of the pulley, bosses 2-2 are provided on both sides, and a groove 2-3 is provided on the top;

[0036] The first connecting ear 8-1 and the second connecting ear 8-2 of the lower base 8 are respectively fixed to the first upper connecting hole 9-1 of the first support rod 9 and the second upper connecting hole 10-1 of the second support rod 10 by connecting bolts; the first lower connecting hole 9-2 of the first support rod 9 and the second lower connecting hole 10-2 of the second support rod 10 are bolted to the third connecting ear 6-7 and the fourth connecting ear 6-8 of the support insulator 6. Such an arrangement can achieve close contact between the contact surfaces and low contact resistance, thereby avoiding burning of parts in the event of a short circuit to ground; the first connecting ears 7-1 and the second connecting ears 7-2 of the upper base 7 are respectively connected to the fifth connecting ear 6-5 and the sixth connecting ear 6-6 of the support insulator 6 by bolt pins;

[0037] The ends of the support insulators 6 are connected to the pulley fixing plate 1 through a plurality of pulley shafts 5, and the pulleys are mounted on the pulley shafts 5. A load-bearing cable passes between the pulleys so that the load-bearing cable is clamped by the pulleys.

[0038] Specifically, in this embodiment, there are three pulleys, namely the first pulley 2, the second pulley 3, and the third pulley 4; there are three corresponding pulley shafts 5, one end of each of the three pulley shafts 5 is respectively mounted on the first mounting hole 1-1, the second mounting hole 1-2, and the third mounting hole 1-3 on the pulley fixing plate 1, and the three mounting holes are arranged in an isosceles triangle, wherein the highest mounting hole is a long hole; correspondingly, the other ends of the three pulley shafts 5 are respectively mounted on the fourth mounting hole 6-1, the fifth mounting hole 6-2, and the sixth mounting hole 6-3 of the support insulator 6, and the fourth mounting hole 6-1 of the support insulator 6 is respectively mounted on the fifth mounting hole 6-2. The mounting hole 6-1, the fifth mounting hole 6-2, and the sixth mounting hole 6-3 are also arranged in a triangle. It should be noted that threads 5-1 are set on both sides of the pulley shaft 5, and the middle is an optical axis 5-2. The two sides pass through the mounting holes and are connected with the threads through nuts to achieve fixation. The bearing cable is clamped by the grooves of the three upper and lower pulleys. When the bearing cable moves along the line direction due to thermal expansion and contraction, the three pulleys are driven to rotate on the pulley shaft. The pulley group can continuously clamp the bearing cable. The position of the first pulley 2 can be adjusted on the long hole of the hardware on the insulator and the pulley fixing plate 1 to adapt to bearing cables with different outer diameters.

[0039] The middle part of the support insulator 6 is the insulator body 6 - 4 . The outer insulation material of the insulator body 6 - 4 is silicone rubber, and the inner insulation material is glass fiber.

[0040] The pulley fixing plate 1, the pulley shaft 5, the upper base 7, the lower base 8, the first support rod 9 and the second support rod 10 are made of stainless steel.

[0041] The first pulley 2 , the second pulley 3 , and the third pulley 4 are made of copper alloy.

[0042] The upper base 7 is located above the lower base 8, and both are fixed on the tunnel wall; by adjusting the distance between the upper base and the lower base, the angle of the insulator can be adjusted to ensure the distance between 27.5kV high-voltage live parts such as load-bearing cables and insulator hardware and the tunnel lining, thereby realizing installation in tunnels with different lining sections and making full use of limited space.

[0043] When the device is installed, the installation height and horizontal position of the catenary are determined according to the line parameters and the contact network system parameters. In this embodiment, the height of the contact line from the rail surface is 6000 mm, the structure height is 850 mm, the installation height of the catenary is 6850 mm, and the pull-out value of the catenary is 300 mm, that is, the horizontal distance between the catenary and the pantograph center line / line center line is 300 mm.

[0044] The above embodiments provide a detailed description of the present invention. However, the contents described are merely preferred embodiments of the present invention and should not be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of the patent application of the present invention.

Claims

1. A simplified contact network arm positioning device suitable for use in conventional railway tunnels, characterized by: It comprises a pulley fixing plate (1), a plurality of pulleys, a supporting insulator (6), an upper base (7), a lower base (8), a first supporting rod (9), and a second supporting rod (10); The first connecting single ear (8-1) and the second connecting single ear (8-2) of the lower base (8) are respectively fixed to the first upper connecting hole (9-1) of the first support rod (9) and the second upper connecting hole (10-1) of the second support rod (10) by connecting bolts; the first lower connecting hole (9-2) of the first support rod (9) and the second lower connecting hole (10-2) of the second support rod (10) are bolted to the third connecting single ear (6-7) and the fourth connecting single ear (6-8) of the support insulator (6); the first connecting double ears (7-1) and the second connecting double ears (7-2) of the upper base (7) are respectively connected to the fifth connecting single ear (6-5) and the sixth connecting single ear (6-6) of the support insulator (6) by bolt pins (12); The ends of the support insulators (6) are connected to the pulley fixing plate (1) via a plurality of pulley shafts (5), and the pulleys are mounted on the pulley shafts (5). A load-bearing cable passes between the pulleys, so that the load-bearing cable is clamped by the pulleys.

2. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: There are three pulleys, namely a first pulley (2), a second pulley (3), and a third pulley (4), and there are three corresponding pulley shafts (5). One end of the three pulley shafts (5) is respectively installed on the first mounting hole (1-1), the second mounting hole (1-2), and the third mounting hole (1-3) on the pulley fixing plate (1). The three mounting holes are arranged in an isosceles triangle, and the highest mounting hole is a long hole.

3. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: Threads (5-1) are provided on both sides of the pulley shaft (5), and an optical axis (5-2) is provided in the middle. Both sides of the optical axis pass through mounting holes and are connected to the threads via nuts to achieve fixation.

4. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: The middle part of the support insulator (6) is an insulator body (6-4); the outer insulating material of the insulator body (6-4) is silicone rubber, and the inner insulating material is glass fiber.

5. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: The upper base (7) adopts an angle steel structure, and a first fixed long hole (7-3) and a second fixed long hole (7-4) are provided at both ends.

6. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: The lower base (8) adopts an angle steel structure, and is provided with a third fixed long hole (8-3) and a fourth fixed long hole (8-4) at both ends.

7. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: The cross-sections of the first support rod (9) and the second support rod (10) are rectangular structures (9-3).

8. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 1, characterized in that: The pulley fixing plate (1), the pulley shaft (5), the upper base (7), the lower base (8), the first support rod (9), and the second support rod (10) are made of stainless steel.

9. The simplified contact network arm positioning device suitable for use in conventional railway tunnels according to claim 2, characterized in that: The first pulley (2), the second pulley (3) and the third pulley (4) are made of copper alloy.

10. The simplified contact network arm positioning device suitable for conventional railway tunnels according to claim 1, characterized in that: The upper base (7) is located above the lower base (8), and both are fixed on the tunnel wall.