Bridge crane cable maintenance method

Abstract

The invention provides a bridge crane cable maintenance method which comprises the following steps: S1, arranging a butt joint guide rail, and hoisting the butt joint guide rail to the end part of an advancing guide rail to be in butt joint with the end part of the advancing guide rail; s2, the two ends of the cable are disconnected, and the cable towing trolley drives the cable to move to the butt joint guide rail from the advancing guide rail; s3, the butt joint guide rail is separated from the advancing guide rail, and the butt joint guide rail is transferred to the ground; s4, the cable is maintained on the ground, or the cable on the butt joint guide rail is taken down and replaced with a qualified cable; s5, the butt joint guide rail carrying the cable is hoisted to the end of the advancing guide rail again to be in butt joint with the end of the advancing guide rail; and then the towing trolley drives the cable to be transferred to the advancing guide rail, and then the two ends of the cable are connected again. According to the maintenance method, the operation difficulty can be reduced, the operation efficiency can be improved, the replacement time is short, and replacement can be completed within ordinary regular repair time; and high-altitude edge operation in the operation process is avoided, and intrinsic safety is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of crane cable maintenance, and in particular to a bridge crane cable maintenance method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] A bridge crane is a lifting equipment that is horizontally mounted above workshops, warehouses and material yards to lift materials. It consists of a bridge (also called a trolley) and a lifting trolley (also called a small car). The bridge is equipped with cables connected to the lifting trolley. The cables roll with the travel rails on the bridge (usually I-beam rails, and the towing trolley is hung at the bottom of the rails) through the towing cable trolley. During the movement of the lifting trolley, the cables move forward and backward with the lifting trolley.

[0004] For bridge cranes working in high temperature environments, their cables are often damaged. For example, in steel enterprises, bridge cranes responsible for the operation of feeding molten iron into converters have large flames during the operation of feeding molten iron due to scrap steel resources and production organization, which causes serious cable burn damage. As a result, the crane cables need to be replaced frequently, and it takes 12 hours to replace the cables. Regular maintenance (regular maintenance, referred to as regular maintenance) does not take such a long time and can only be arranged during the furnace maintenance period. However, the number of furnace maintenance each year is limited, which restricts the replacement of cables, resulting in the cables often "working with illnesses" and often causing production interruptions due to cable grounding and short circuits. In addition, the cranes are frequently started, vibrate, are hot, have large dust and are conductive, which leads to frequent electrical accidents in the system.

[0005] Furthermore, the existing methods involve high-altitude edge operations when replacing cables, which poses a high safety risk. Summary of the invention

[0006] The main purpose of the present invention is to provide a bridge crane cable maintenance method for safely and quickly maintaining and replacing the cables.

[0007] To achieve the above object, the technical solution of the present invention is implemented as follows: a method for maintaining a bridge crane cable, comprising:

[0008] S1. Setting a docking guide rail, hoisting the docking guide rail to the end of the traveling guide rail, and aligning the end of the docking guide rail with the end of the traveling guide rail;

[0009] S2, disconnect both ends of the cable, and move the cable trolley with the cable from the traveling guide rail to the docking guide rail;

[0010] S3, separating the docking rail from the traveling rail, and hoisting the docking rail together with the towing cable trolley and cable thereon to the ground;

[0011] S4. Maintain the cables on the ground, or remove the cables on the docking rails and replace them with qualified cables;

[0012] S5. Re-lift the docking rail carrying the cable to the end of the traveling rail, and align the end of the docking rail with the end of the traveling rail. Then the cable trolley moves the cable from the docking rail to the traveling rail, and then reconnects the two ends of the cable.

[0013] Furthermore, the docking guide rail hoisted to the ground is placed on a tow cable bracket, which includes two left and right frames, and a connecting portion located at the bottom of the two frames and connected to the two frames, and the docking guide rail is placed on the two frames.

[0014] Furthermore, dead stop limits are provided at both ends of the docking guide rail.

[0015] Furthermore, the dead stop limiter is a screw rod passed through the two ends of the docking guide rail, and a hole is opened at the position of the corresponding screw rod on the tow cable bracket. The screw rods at the two ends of the docking guide rail on the tow cable bracket pass downward through the bottom of the docking guide rail and are passed through the corresponding holes.

[0016] Furthermore, in S4, when removing the cables from the docking guide rail, first release the limit of the cable trolley on the cables, and then remove the cables from each cable trolley.

[0017] Furthermore, in S4, when removing the cable from the docking rail, the cable trolley is moved toward one end of the docking rail and removed from the end of the docking rail, so that the cable trolley together with the cable is removed from the docking rail, and the cable is replaced together with the cable trolley.

[0018] Furthermore, a lifting lug is provided on the docking guide rail.

[0019] Furthermore, the cross section of the docking guide rail is equal to the cross section of the traveling guide rail.

[0020] The beneficial effects of the present invention are embodied in:

[0021] The present invention provides a docking rail and docks it with the traveling rail. The cables to be maintained and replaced are transferred to the ground by allowing the cable trolley to carry the cables between the docking rail and the traveling rail, and the cables are maintained and replaced on the ground. Then, the qualified cables are transferred back to the traveling rail. This maintenance method can not only reduce the difficulty of operation and improve the operation efficiency, but also shorten the replacement time and can be completed during the normal scheduled maintenance time. In addition, the cable maintenance method of the present invention avoids the high-altitude edge operation during the operation process, thereby achieving inherent safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached picture:

[0023] Figure 1 It is a schematic diagram of the towing cable trolley on the travel guide rail in the present invention;

[0024] Figure 2 It is a schematic diagram of the transfer of the docking guide rail to the towing cable support in the present invention;

[0025] Figure 3 for Figure 2 Magnified view at A in the middle.

[0026] Description of reference numerals:

[0027] 1. Docking rail; 11. Screw rod; 12. Lifting ear; 2. Traveling rail; 3. Towing cable trolley; 4. Towing cable bracket; 41. Frame; 42. Connecting part; 43. Hole. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0029] See also Figures 1 to 3 .

[0030] The invention discloses a method for maintaining a bridge crane cable, comprising:

[0031] S1. A docking guide rail 1 is provided, and the docking guide rail 1 is hoisted to the end of the traveling guide rail 2, and the end of the docking guide rail 1 is aligned with the end of the traveling guide rail 2; wherein the cross section of the docking guide rail 1 is equal to the cross section of the traveling guide rail 2;

[0032] S2, disconnect both ends of the cable from the terminal boxes on the bridge and the lifting trolley (i.e., the terminal boxes on the trolley and the trolley), and then move the cable trolley 3 with the cable from the traveling guide rail 2 to the docking guide rail 1;

[0033] S3, separating the docking guide rail 1 from the traveling guide rail 2, and hoisting the docking guide rail 1 together with the towing cable trolley 3 and the cable thereon to the ground;

[0034] S4. Maintain the cables on the ground, or remove the cables on the docking rail 1 and replace them with qualified cables;

[0035] S5, lift the docking rail 1 carrying the cable to the end of the traveling rail 2 again, and align the end of the docking rail 1 with the end of the traveling rail 2, then move the cable trolley 3 with the cable from the docking rail 1 to the traveling rail 2, and then reconnect the two ends of the cable to the terminal box on the bridge and the lifting trolley. After that, lift the docking rail 1 away, and complete the maintenance and replacement of the crane cable.

[0036] The present invention provides a docking guide rail 1 and docks it with the traveling guide rail 2. The cable to be maintained and replaced is transferred to the ground by allowing the cable trolley 3 to transfer the cable between the docking guide rail 1 and the traveling guide rail 2, and the maintenance and replacement are carried out on the ground. Then the qualified cable is transferred back to the traveling guide rail 2. This maintenance method can not only reduce the difficulty of operation and improve the operation efficiency, but also quickly replace the cable, and the replacement can be completed during the normal scheduled maintenance time (according to practice, the shutdown maintenance time can be reduced from 12 hours to 5 hours, so that the work that can only be done during furnace maintenance can be completed during the normal scheduled maintenance); in addition, the cable maintenance method of the present invention avoids the high-altitude edge operation during the operation process, thereby achieving inherent safety.

[0037] It should be noted that before S1, it is necessary to first release the dead stop limit at the end of the travel guide rail 2. There are many ways to lift the docking guide rail 1, such as using a maintenance hoist, or of course, using a mobile crane for lifting.

[0038] In addition, there are many ways to align the docking guide rail 1 with the traveling guide rail 2. For example, the two can be aligned by manual support / roping, etc., and a constraint component can be set at the end of the docking guide rail 1 for constraint alignment. The constraint component can be a connecting plate set on the top of the docking guide rail 1 or the traveling guide rail 2, and a plurality of connecting holes are opened on the connecting plate. Another connecting hole is opened at the position of the corresponding connecting plate at the top of the docking guide rail 1 or the traveling guide rail 2. After the docking guide 1 and the traveling guide 2 are aligned, the connecting holes are aligned with each other, and then a screw 11 or a pin is passed through it, so that the alignment can be constrained.

[0039] In one embodiment, the docking guide rail 1 hoisted to the ground is placed on a tow cable bracket 4, which includes two left and right frames 41, and a connecting portion 42 located at the bottom of the two frames 41 and connected to the two frames 41, and the docking guide rail 1 is placed horizontally on the two frames 41.

[0040] In a specific implementation, the connecting portion 42 can be a connecting rod or a connecting plate; the setting of the towing cable bracket 4 allows the docking guide rail 1 to be placed overhead, which is beneficial for subsequent maintenance of the cable and separation of the towing cable trolley 3 from the docking guide rail 1.

[0041] In one embodiment, both ends of the docking guide rail 1 are provided with dead stop limiters.

[0042] Among them, the dead stop limiter is a screw rod 11 passed through the two ends of the docking guide rail 1, and a hole 43 is opened at the position of the corresponding screw rod 11 on the tow cable bracket 4. The screw rods 11 at both ends of the docking guide rail 1 on the tow cable bracket 4 penetrate downwardly through the bottom of the docking guide rail 1 and are passed through the corresponding holes 43.

[0043] In specific implementation, the setting of the dead stop limit can, on the one hand, prevent the cable trolley 3 from falling off the cable bracket 4 during the lifting process of the docking guide rail 1, and on the other hand, the setting of the screw rod 11 penetrating downward into the corresponding hole 43 makes the screw rod 11 as the dead stop limit serve two purposes, that is, it can be used as a dead stop limit and as a limit for the docking guide rail 1 on the cable bracket 4, so that the position of the docking guide rail 1 on the cable bracket 4 will not be easily moved. When docking with the traveling guide rail 2, the dead stop limit of the docking guide rail 1 corresponding to one end of the traveling guide rail 2 should be removed, and after the cable trolley 3 has fully entered the docking guide rail 1, the dead stop limit is reinstalled.

[0044] In one embodiment, in S4 , when removing the cables from the docking guide rail 1 , the limit of the cables by the towing cable trolley 3 is first released, and then the cables are removed from each towing cable trolley 3 .

[0045] In one embodiment, a lifting lug 12 is provided on the docking guide rail 1. Preferably, the lifting lug 12 is provided in plurality.

[0046] Embodiment 2:

[0047] The difference between this embodiment and the first embodiment is that:

[0048] In S4, when the cable on the docking guide rail 1 is removed, the towing cable trolley 3 is moved toward one end of the docking guide rail 1 and removed from the end of the docking guide rail 1, so that the towing cable trolley 3 together with the cable is removed from the docking guide rail 1, and the cable together with the towing cable trolley 3 is replaced together.

[0049] In specific implementation, this method of replacing the cables together can further shorten the time of parking for maintenance, and the replaced cables together with the towing cable trolley 3 can be transported separately to one place for repair.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0051] It should be noted that if the embodiments of the invention involve directional indications (such as up and down), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the invention.

Claims

1. A method for maintaining a bridge crane cable, characterized in that: include: S1. Setting a docking guide rail (1), hoisting the docking guide rail (1) to the end of the traveling guide rail (2), and aligning the end of the docking guide rail (1) with the end of the traveling guide rail (2); S2, disconnecting the two ends of the cable, and moving the cable trolley (3) with the cable from the traveling guide rail (2) to the docking guide rail (1); S3, separating the docking guide rail (1) from the traveling guide rail (2), and hoisting the docking guide rail (1) together with the towing cable trolley (3) and the cable thereon to the ground; S4. Maintain the cables on the ground, or remove the cables on the docking rail (1) and replace them with qualified cables; S5. The docking rail (1) carrying the cable is hoisted back to the end of the traveling rail (2), and the end of the docking rail (1) is aligned with the end of the traveling rail (2). Then, the cable trolley (3) moves the cable from the docking rail (1) to the traveling rail (2), and then the two ends of the cable are reconnected.

2. The method for maintaining the cable of a bridge crane according to claim 1, characterized in that: The docking guide rail (1) hoisted to the ground is placed on a towing cable bracket (4), the towing cable bracket (4) comprising two left and right frames (41), and a connecting portion (42) located at the bottom of the two frames (41) and connected to the two frames (41), and the docking guide rail (1) is placed on the two frames (41).

3. The method for maintaining the cable of a bridge crane according to claim 2, characterized in that: Dead stop limits are arranged at both ends of the docking guide rail (1).

4. The method for maintaining the cable of a bridge crane according to claim 3, characterized in that: The dead stop limiter is a screw rod (11) passing through the two ends of the docking guide rail (1), and a hole (43) is provided at the position corresponding to the screw rod (11) on the towing cable bracket (4). The screw rods (11) at the two ends of the docking guide rail (1) on the towing cable bracket (4) pass downward through the bottom of the docking guide rail (1) and pass through the corresponding hole (43).

5. The method for maintaining a bridge crane cable according to any one of claims 1 to 4, characterized in that: In the above-mentioned S4, when removing the cables from the docking guide rail (1), firstly release the position limit of the cable towing trolley (3) on the cables, and then remove the cables from each cable towing trolley (3).

6. The method for maintaining a bridge crane cable according to any one of claims 1 to 4, characterized in that: In S4, when removing the cable from the docking rail (1), the cable trolley (3) is moved toward one end of the docking rail (1) and removed from the end of the docking rail (1), so that the cable trolley (3) and the cable are removed from the docking rail (1), and the cable and the cable trolley (3) are replaced together.

7. The method for maintaining a bridge crane cable according to any one of claims 1 to 4, characterized in that: The docking guide rail (1) is provided with a lifting lug (12).

8. The method for maintaining a bridge crane cable according to any one of claims 1 to 4, characterized in that: The cross section of the docking guide rail (1) is equal to the cross section of the traveling guide rail (2).

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