Packaging structure of large-dip-angle hoisting contact rail and matched hoisting tool

Abstract

The utility model discloses a packaging structure of a large-dip-angle hoisting contact rail and a matched hoisting tool, and belongs to the field of urban rail traction power supply. Comprising a plurality of wood blocks which are arranged on the upper surfaces and the lower surfaces of the contact rails and are perpendicular to the contact rails, a plurality of spacer blocks for preventing the contact rails from being scratched are arranged among the contact rails, and fasteners penetrate through end connecting holes of the contact rails. The hoisting tool for hoisting the contact rail with the large dip angle comprises PU base plates which are arranged on the upper face and the lower face of the contact rail and are perpendicular to the contact rail, channel steel fixedly connected with the PU base plates is arranged on the other faces of the PU base plates, and a plurality of second bolts and third bolts which play a clamping role are arranged between the contact rail and on the two sides of the contact rail respectively. And protection plates for protecting the lifting belts are welded at two ends of the channel steel respectively. A weldment used for penetrating through a hanging belt is welded to the middle section of the steel channel. According to the packaging structure of the large-dip-angle hoisting contact rail and the matched hoisting tool, the effects of high safety, good fixity and high hoisting efficiency can be achieved.

Description

Technical Field

[0001] The utility model relates to urban rail traction power supply, in particular to a packaging structure for hoisting a contact rail at a large inclination angle and a matching hoisting tool. Background Art

[0002] In recent years, urban rail transit has developed rapidly, with many cities now having subways, and many more under construction. Some subway lines pass through crowded urban areas, while others run through spacious suburban areas. Different environments necessitate significant differences in subway construction methods. In urban areas, where there's insufficient ground space for subway lines, or even for elevated construction, underground tunnels are the only option.

[0003] The contact rail is a device that transmits electrical energy to the electric traction vehicles of the subway and urban rail transit system. It refers to a separate rail installed next to the urban rail (subway, light rail, etc.) line for power supply. It is also called the third rail, power supply rail, or return rail.

[0004] At present, the contact rails most commonly used in urban rail transit are 15-meter steel-aluminum composite rails. During the construction process, there will be situations where the tunnel entrance is less than 15 meters long. In order to transport the contact rail from the ground to the tunnel, the contact rail needs to be tilted and lifted into the tunnel.

[0005] Contact rail packaging typically consists of five rails per group, secured lengthwise with multiple sets of lumber or bolts. When lifting the rails at a steep angle, insufficient friction and strength in the lumber packaging can cause the rails to slide out of sync, or even damage the packaging, leading to quality issues and safety hazards.

[0006] In addition, since the friction coefficient of the contact rail surface is small and there is no ideal position to fix the sling, when the contact rail is lifted at a large angle, the sling will slide on the contact rail and cannot be fixed, which will cause a group of contact rails to slide as a whole, causing product damage and huge safety problems.

[0007] In summary, the development and application of a good packaging method and professional lifting tools play a huge role in improving the efficiency and safety of large-angle lifting operations of contact rails. Summary of the Invention

[0008] Purpose of the utility model: The purpose of the utility model is to provide a packaging structure for a large-angle lifting contact rail with high safety and good fixation.

[0009] Another object of the utility model is to provide a tool for lifting contact rails at large inclination angles with high safety, good fixation and high lifting efficiency.

[0010] Technical solution: The packaging structure of the large-angle lifting contact rail described in the utility model includes a plurality of wooden blocks arranged on the upper and lower surfaces of multiple contact rails and placed perpendicular to them, a plurality of spacer woods are arranged between the multiple contact rails to protect the contact rails, and fasteners are passed through the end connection holes of the multiple contact rails.

[0011] Preferably, the fastener is a screw rod or a long bolt.

[0012] Preferably, two wooden blocks in the same vertical direction are connected up and down by first bolts at both ends thereof.

[0013] A lifting tool for lifting contact rails at a large inclination angle includes PU pads arranged on the upper and lower surfaces of multiple contact rails and placed perpendicular to them. The other side of the PU pads is provided with channel steel fixedly connected to them, and a plurality of second bolts and third bolts for clamping are respectively provided between and on both sides of the contact rails.

[0014] Preferably, protective plates for protecting the slings are provided at both ends of the channel steel.

[0015] Preferably, the protection plates are welded to both ends of the channel steel.

[0016] Preferably, a weldment for passing a sling is welded to the middle section of the channel steel.

[0017] Preferably, a hole for passing the sling is opened in the middle section of the channel steel.

[0018] Preferably, the PU pad and the channel steel are doubly connected using glue and countersunk bolts.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) Two screw rods with threads at both ends are respectively inserted into the connection holes reserved at the front and rear ends of the contact rail, and double nuts are used to fasten them, thereby improving the integrity of each group of contact rails, effectively avoiding the problem of insufficient strength of the original packaging, solving the problem of looseness of each group of contact rails during large-angle lifting, ensuring product quality, and improving the installation performance of the lifting; (2) Holes for the sling to pass through are provided on the channel steel in the lifting tool, providing a firm lifting point for the sling, so that the sling and the channel steel are worn together, avoiding the problem of the sling slipping off during large-angle lifting, thereby avoiding safety hazards; (3) In the lifting tool, a number of second bolts with a clamping function are provided between the contact rails to reinforce the connection between the contact rails and prevent them from slipping during large-angle lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the length direction of multiple contact rails packed together;

[0021] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0022] Figure 3 A schematic diagram of the widthwise ends of multiple contact rails packed together;

[0023] Figure 4 This is a schematic diagram of the lifting tool;

[0024] Figure 5 This is a schematic diagram of using lifting tools to lift the packaged contact rail. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be further described below in conjunction with the embodiments.

[0026] like Figure 1-3 As shown, the packaging structure of the large-angle lifting contact rail described in the utility model includes a plurality of wooden blocks 2 for fixing multiple contact rails 1 and placed perpendicularly thereto, a plurality of spacer woods 3 are provided between the multiple contact rails 1 to prevent the contact rails 1 from being scratched, and fasteners 4 are passed through the end connection holes 1-1 of the multiple contact rails 1.

[0027] The two wooden blocks 2 in the same vertical direction are connected by first bolts 5 at both ends thereof to fix the connection between the contact rails.

[0028] The fastener 4 is a screw rod.

[0029] The inclination angle is 25°-75°.

[0030] like Figure 4 As shown, the lifting tool for lifting the contact rail at a large inclination angle described in the utility model includes a PU pad 6 for fixing multiple contact rails 1 and placing them perpendicular to them. The PU pad 6 is arranged on the upper and lower surfaces of the contact rail 1. The PU pad 6 can prevent the contact rail 1 from being scratched and play a buffering role. The PU pad is a soft material and increases the friction coefficient by deforming the contact surface after being subjected to force; the other side of the PU pad 6 is provided with a channel steel 7 fixedly connected to it, and a number of second bolts 8 and third bolts 9 for clamping are respectively provided between and on both sides of the contact rails 1.

[0031] Protection plates 10 for protecting the slings are respectively provided at both ends of the channel steel 7 .

[0032] The protection plates 10 are welded to both ends of the channel steel 7 .

[0033] A reinforcing weldment 11 is welded to the middle section of the channel steel 7, which can not only strengthen the structural strength of the channel steel 7, but also form a hole with the reinforcing channel steel 7 for the sling to pass through, thereby preventing the sling from slipping.

[0034] The PU pad and the channel steel are connected with glue and then connected with countersunk bolts 12 to make the connection between the two tighter.

[0035] The method of using the packaging structure of the large-angle hoisting contact rail described in the utility model is as follows: the steel-aluminum composite rail is used as the contact rail. During the transportation of the contact rail, five contact rails are grouped together and packaged with multiple groups of wood using the traditional method. The packaging diagram is shown in FIG. Figure 1-2 As shown. Figure 3 As shown, a screw is inserted through each of the reserved connection holes 1-1 at each end of the contact rail 1 to restrict the longitudinal movement of the contact rail 1. Spacers 3 are installed between the two contact rails 1 to prevent scratches caused by contact between the contact rails 1 and to restrict their lateral movement. Because the movement of the contact rail 1 is restricted in both the longitudinal and lateral directions, it prevents the contact rail 1 from sliding down asynchronously during high-angle lifting, thus preventing damage to the timber packaging and potentially preventing quality issues and safety hazards.

[0036] The use method and working principle of the lifting tool for lifting the contact rail with a large inclination angle described in the utility model are as follows: Figure 4 As shown, after the contact rail 1 is packaged using the above-mentioned packaging structure, it is transported to the tunnel entrance. PU pads 6 and channel steels 7 doubly connected to them with glue and countersunk bolts are placed at the upper and lower ends of the contact rail 1 respectively; third bolts 9 are installed on the left and right sides of the contact rail 1 for installing and fixing the contact rail 1; second bolts 8 are installed between the contact rails 1 for reinforcing the connection between the contact rails 1. The channel steel 7, together with the PU pad 6, tightly clamps the contact rail 1. Due to the material properties of the PU pad 6 and the strength of the channel steel 7, huge friction and connection reliability are provided between the lifting tool and the contact rail 1. The protective plate 10 is polished smooth so that when in use, the sling can smoothly stick to the protective plate 10 to avoid the sharp and pointed parts of the channel steel from cutting the sling, thereby creating danger.

[0037] like Figure 5 As shown, during lifting, the lifting points are adjusted according to the length, weight, and angle of insertion of the contact rail. Lifting tools are installed at each lifting point, for a total of three sets. The center set of lifting tools clamps the five contact rails, providing reinforcement. Two lifting straps of different lengths are inserted from the crane into the weldment 11 in the middle section of the channel steel 7, or into the holes in the channel steel itself, on the front and rear sets of lifting tools. The lifting is then slowly performed, creating a steep angle suitable for insertion into the tunnel. This allows the contact rail to be safely and reliably lifted into the tunnel.

Claims

1. A packaging structure for lifting contact rails at a large inclination angle, comprising a plurality of wooden blocks (2) arranged on the upper and lower surfaces of a plurality of contact rails (1) and placed perpendicular to the contact rails, characterized in that: A plurality of spacer woods (3) for protecting the contact rails (1) are provided between the plurality of contact rails (1), and fasteners (4) are passed through the end connection holes (1-1) of the plurality of contact rails (1).

2. The packaging structure of the high-angle hoisting contact rail according to claim 1 is characterized in that: The fastener (4) is a screw rod or a long bolt.

3. The packaging structure of the high-angle hoisting contact rail according to claim 1 is characterized in that: Two wooden blocks (2) in the same vertical direction are connected via first bolts (5) at both ends thereof.

4. A lifting tool for lifting a contact rail at a large angle, which is compatible with the packaging structure according to claim 1, characterized in that: The invention comprises a PU pad (6) provided on the upper and lower surfaces of a plurality of contact rails (1) and placed perpendicularly thereto; a channel steel (7) fixedly connected thereto is provided on the other side of the PU pad (6); and a plurality of second bolts (8) and third bolts (9) for clamping are respectively provided between and on both sides of the contact rails (1).

5. The lifting tool according to claim 4, characterized in that: Both ends of the channel steel (7) are respectively provided with protection plates (10) for protecting the slings.

6. The lifting tool according to claim 5, characterized in that: The protection plates (10) are welded to both ends of the channel steel (7).

7. The lifting tool according to claim 4, characterized in that: A weldment (11) for passing a sling is welded to the middle section of the channel steel (7).

8. The lifting tool according to claim 4, characterized in that: The middle section of the channel steel (7) is provided with a hole for passing the sling.

9. The lifting tool according to claim 4, characterized in that: The PU backing plate (6) and the channel steel (7) are connected by glue.

10. The lifting tool according to claim 4, characterized in that: The PU backing plate (6) and the channel steel (7) are connected by countersunk bolts (12).

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