Emergency device for fault of hydraulic cylinder for lifting rail in rolling mill and processing method

Abstract

The invention relates to an emergency device for a hydraulic cylinder for a lifting rail in a rolling mill in failure and a processing method.The emergency device for the hydraulic cylinder for the lifting rail in the rolling mill in failure comprises a lifting rail extension section, an upper fixing support, an upper boss, a lower fixing support and a lower boss, and one side of the upper fixing support is fixedly connected with the lifting rail extension section; an upper boss is arranged on the other side of the upper fixing support, a lower boss is arranged on the side portion of the lower end of the lower fixing support, the lower boss is located under the upper boss, and the bottom end of the upper fixing support abuts against the top end of the lower fixing support. The fixing support has the advantages that the upper boss is arranged on the other side of the upper fixing support, the lower boss is arranged on the side portion of the lower end of the lower fixing support, the upper fixing support and the upper boss are of an integrated structure, the lower fixing support and the lower boss are of an integrated structure, the bosses are used during accident emergency disposal, the integrated structure is designed, the strength is improved, machining is convenient, and maintenance is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling technology, and in particular to an emergency device and a processing method for a hydraulic cylinder failure in a rolling mill. Background Art

[0002] When the working rolls of the finishing mill are replaced, the roll-changing trolley pushes and pulls the working rolls in and out of the mill, and a running wheel is installed under the lower working roll bearing box. The running wheel runs on the roll-changing track. The roll-changing track inside the mill is lifted to the roll-changing position during roll-changing and lowered to the rolling position during rolling, so it is called the lifting track. The lifting track device is a key equipment of the roll-changing system. Each rolling mill has two lifting tracks installed on the entrance and exit sides of the frame. During the process of changing the working rolls, the track inside the lifting frame is raised to the same height as the lower working roll roll-changing running wheel, so that the working roll is in the roll-changing position, and the working roll is pulled out and pushed in the frame. The track lifting equipment is below the rolling line elevation during production. When changing rolls, it is lifted to the roll changing position, which is consistent with the height of the outer track of the frame. The lifting process and positioning of the lifting track are driven by the hydraulic cylinder installed at the bottom of the device. Since the maximum static load of the lifting hydraulic cylinder device is about 160 tons, the bolts at the base of the hydraulic cylinder are the weak points of the load. Once the bolts break or the hydraulic cylinder piston leaks, it will affect the roll changing, causing shutdown accidents and affecting safe production. Summary of the invention

[0003] The purpose of the present invention is to provide an emergency device and a processing method for the failure of a hydraulic cylinder for lifting rails in a rolling mill, so that when the lifting function of the hydraulic cylinder is lost, the roll change can continue to be completed to ensure smooth production.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] An emergency device for a hydraulic cylinder failure in a lifting rail in a rolling mill comprises a lifting rail extension section 1, an upper fixed bracket, an upper boss, a lower fixed bracket and a lower boss, one side of the upper fixed bracket is fixedly connected to the lifting rail extension section, the other side of the upper fixed bracket is provided with an upper boss, the side of the lower end of the lower fixed bracket is provided with a lower boss, the lower boss is located directly below the upper boss, and the bottom end of the upper fixed bracket abuts against the top end of the lower fixed bracket.

[0006] The upper fixing bracket and the upper boss are an integrated structure, and the lower fixing bracket and the lower boss are an integrated structure.

[0007] It also includes a hydraulic cylinder, which is used to push the bottom end of the lower fixed bracket. Through the telescopic action of the hydraulic cylinder, the lower fixed bracket drives the upper fixed bracket and the extension section of the lifting track to move up and down.

[0008] The bottom of the hydraulic cylinder is fixedly connected to the lower boss.

[0009] The extension section of the lifting track is to extend the original lifting track by 200 to 300 mm.

[0010] Emergency handling method when the hydraulic cylinder for lifting the rail in the rolling mill fails. When the hydraulic cylinder fails, place the hydraulic jack between the lower boss and the upper boss to press the lower boss and the upper boss. Lift the upper fixed bracket through the hydraulic jack, and the lifting rail will be lifted to the position for replacing the working roll.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. One side of the upper fixed bracket is fixedly connected to the extension section of the lifting track by bolts. The extension section of the lifting track extends the original lifting track by 200-400mm, reducing the force impact of the extension section of the lifting track and the fixed bracket on the lifting track, thereby extending the service life of the lifting track;

[0013] 2. An upper boss is arranged on the other side of the upper fixed bracket, and a lower boss is arranged on the side of the lower end of the lower fixed bracket. The upper fixed bracket and the upper boss are an integrated structure, and the lower fixed bracket and the lower boss are an integrated structure. The boss is used for emergency disposal of accidents and is designed as an integrated structure to increase strength, facilitate processing, and exempt maintenance;

[0014] 3. The hydraulic jack is used to lift the fixed bracket on the lifting track, and the lifting track is then lifted to the position for replacing the working roll. When the lifting function of the hydraulic cylinder is lost, the hydraulic jack can continue to complete the roll replacement operation to ensure smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the emergency device for lifting the track on the working side.

[0016] Figure 2 This is the front view of the emergency device for lifting the rail on the working side.

[0017] Figure 3 This is the left view of the emergency device for lifting the rail on the working side.

[0018] Figure 4 It is a top view of the emergency device for lifting the rail on the working side.

[0019] Figure 5 It is a structural schematic diagram of the emergency device for lifting the rail on the transmission side.

[0020] Figure 6 This is the front view of the emergency device for lifting the rail on the transmission side.

[0021] Figure 7 This is the left view of the transmission side lifting track emergency device.

[0022] Figure 8This is a top view of the emergency device for lifting the rail on the transmission side.

[0023] In the figure: 1-extension section of lifting track 2-fixed bracket on lifting track 3-upper boss of emergency device 4-fixed bracket below lifting track 5-lower boss of emergency device 6-hydraulic cylinder. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0025] An emergency device for a hydraulic cylinder failure in a lifting track in a rolling mill, comprising a lifting track extension section 1, a lifting track upper fixed bracket 2, an emergency device upper boss 3, a lifting track lower fixed bracket 4, an emergency device lower boss 5, and a hydraulic cylinder 6. The lifting track extension section 1 is to extend the original lifting track to 200mm outside the lifting track upper fixed bracket 2. The hydraulic cylinder 6 is used to push the bottom end of the lifting track lower fixed bracket 4. Through the telescopic action of the hydraulic cylinder 6, the lifting track lower fixed bracket 4 drives the lifting track upper fixed bracket 2 and the lifting track extension section 1 to move up and down. The base of the hydraulic cylinder 6 and the lower boss 5 is fixedly connected by bolts, one side of the upper fixed bracket 2 of the lifting track is fixedly connected to the extension section 1 of the lifting track by bolts, the other side of the upper fixed bracket 2 of the lifting track is provided with an upper boss 3 of the emergency device, and the side of the lower end of the lower fixed bracket 4 of the lifting track is provided with a lower boss 5 of the emergency device, the upper fixed bracket 2 of the lifting track and the upper boss 3 of the emergency device are an integrated structure, the lower fixed bracket 4 of the lifting track and the lower boss 5 of the emergency device are an integrated structure, the lower boss 5 of the emergency device is located directly below the upper boss 3 of the emergency device, and the bottom end of the upper fixed bracket 2 of the lifting track abuts against the top end of the lower fixed bracket 4 of the lifting track.

[0026] Emergency handling method when the hydraulic cylinder for lifting rail in the rolling mill fails. When the hydraulic cylinder 6 fails, the hydraulic jack 7 is placed between the lower boss 5 of the emergency device and the upper boss 3 of the emergency device to press the lower boss 5 of the emergency device and the upper boss 3 of the emergency device. The fixed bracket 2 on the lifting rail is lifted by the hydraulic jack 7, and the extension section 1 of the lifting rail is also lifted to the position for replacing the working roll. The hydraulic jack uses a 20-ton hydraulic jack.

[0027] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0028] [Example 1]

[0029] An emergency device for the hydraulic cylinder failure of the lifting rail in a rolling mill, the original lifting rail is extended to 200mm outside the frame, the force impact of the lifting rail extension section and the lifting rail upper fixed bracket is reduced, and the service life of the lifting rail is extended. The outer side of the lifting rail upper fixed bracket 2 and the outer side of the lifting rail lower fixed bracket 4 are respectively added with an emergency device upper boss 3 and an emergency device lower boss 5 during manufacturing. The lifting rail upper fixed bracket 2 and the emergency device upper boss 3 are an integrated structure, and the lifting rail lower fixed bracket 4 and the emergency device lower boss 5 are an integrated structure. Figure 1-Figure 8 The lifting track is an integral track extending from the operating side to the transmission side, with one track for the entrance and one track for the exit. The position of the lower boss 5 of the emergency device is selected at the side of the lower end of the fixed bracket 4 under the lifting track, and the position of the upper boss 3 of the emergency device is selected at the other side of the fixed bracket 2 on the lifting track. The length and height of the lower boss 5 of the emergency device are consistent with the side of the lower end of the fixed bracket 4 under the lifting track, and the width is 50 to 100 mm. The length and height of the upper boss 3 of the emergency device are consistent with the other side of the fixed bracket 2 on the lifting track, and the width is 50 to 100 mm.

[0030] The emergency treatment method for the failure of the hydraulic cylinder for lifting rails in the rolling mill is as follows:

[0031] Four 20-50 ton hydraulic jacks (since there is a hydraulic cylinder 6 at each corner of the rolling mill, when the device fails, a hydraulic jack needs to be placed at each corner to jack up the lifting rail at the same time to complete the roll change) are placed on the lower boss 5 of the emergency device. Each hydraulic jack requires two people to operate, one of whom supports the jack and the other operates the jack. The fixed bracket 2 on the lifting rail is lifted up by four hydraulic jacks. Since the fixed bracket 2 on the lifting rail is connected to the lifting rail, the lifting rail is also lifted to the required height. The four hydraulic jacks are required to be operated synchronously to prevent the lifting rail from being uneven when lifted, causing the rolls to tilt. Each rolling mill uses four hydraulic jacks to lift the lifting rail to meet the needs of replacing working rolls.

[0032] One side of the upper fixed bracket of the present invention is fixedly connected to the extension section of the lifting track by bolts. The extension section of the lifting track extends the original lifting track by 200 to 400 mm, reduces the force impact of the extension section of the lifting track and the fixed bracket on the lifting track, and extends the service life of the lifting track; an upper boss is arranged on the other side of the upper fixed bracket, and a lower boss is arranged on the side of the lower end of the lower fixed bracket. The upper fixed bracket and the upper boss are an integrated structure, and the lower fixed bracket and the lower boss are an integrated structure. The boss is used for emergency disposal of accidents and is designed as an integrated structure to increase strength, facilitate processing, and avoid maintenance; the hydraulic jack is used to lift the fixed bracket on the lifting track, and the lifting track is then lifted to the position for replacing the working roller. When the lifting function of the hydraulic cylinder is lost, the hydraulic jack can continue to complete the roller replacement operation to ensure smooth production.

Claims

1. An emergency device for a hydraulic cylinder failure in a rolling mill, characterized in that: It includes a lifting rail extension section 1, an upper fixed bracket, an upper boss, a lower fixed bracket, and a lower boss. One side of the upper fixed bracket is fixedly connected to the lifting rail extension section, the other side of the upper fixed bracket is provided with an upper boss, and the side of the lower end of the lower fixed bracket is provided with a lower boss. The lower boss is located directly below the upper boss, and the bottom end of the upper fixed bracket abuts against the top end of the lower fixed bracket.

2. The emergency device for a hydraulic cylinder failure in a rolling mill according to claim 1, characterized in that: The upper fixing bracket and the upper boss are an integrated structure, and the lower fixing bracket and the lower boss are an integrated structure.

3. The emergency device for hydraulic cylinder failure in a rolling mill according to claim 1, characterized in that: It also includes a hydraulic cylinder, which is used to push the bottom end of the lower fixed bracket. Through the telescopic action of the hydraulic cylinder, the lower fixed bracket drives the upper fixed bracket and the extension section of the lifting track to move up and down.

4. The emergency device for hydraulic cylinder failure in a rolling mill according to claim 3, characterized in that: The bottom of the hydraulic cylinder is fixedly connected to the lower boss.

5. The emergency device for hydraulic cylinder failure in a rolling mill according to claim 1, characterized in that: The lifting track extension section is to extend the original lifting track by 200-300 mm.

6. A method for emergency treatment of a hydraulic cylinder failure in a rolling mill using a device according to any one of claims 1 to 5, characterized in that: When the hydraulic cylinder fails, the hydraulic jack is placed between the lower boss and the upper boss to press the lower boss and the upper boss. The upper fixed bracket is lifted by the hydraulic jack, and the lifting rail is then lifted to the position for replacing the working roll.

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