Disc fork arm connection structure and hydraulic cylinder replacement method

Abstract

This invention relates to the field of maintenance equipment for disc fork arms on ladle turntables, and in particular to a safe, reliable, and simpler / quicker method for replacing hydraulic cylinders using a disc fork arm connection structure. The invention includes two disc fork arms, each comprising a fork arm connecting end and a fork arm supporting end. At least two hydraulic cylinders are mounted at the bottom of each disc fork arm, including a fork arm locking saddle. The fork arm connecting ends are connected via the fork arm locking saddle, which includes at least two saddle holders, each fixedly mounted on its corresponding fork arm connecting end. The saddle holders are detachably connected via a saddle connection structure. This invention is particularly applicable to the maintenance process of disc fork arms on ladle turntables.

Description

Technical Field

[0001] This invention relates to the field of maintenance equipment for disc fork arms of ladle turntables, and in particular to a disc fork arm connection structure and a method for replacing hydraulic cylinders. Background Technology

[0002] The disc fork arm of the ladle turret in a steel plant's continuous casting machine consists of a fork arm support end, a fork arm connecting end, at least two hydraulic cylinders, and related accessories. Due to the frequent operation and heavy loads of the hydraulic cylinders in the disc fork arm, mechanical wear can lead to unstable operation and significant safety hazards, necessitating periodic replacement. The traditional method involves installing two 10-ton hand-operated hoists and slings at the top of the ladle turret's rotating body to adjust the relative working positions of the two disc forks and to depressurize the hydraulic cylinders to be replaced, facilitating their removal and installation. After replacement, the hand-operated hoists and slings must be removed. This method of replacing hydraulic cylinders using two 10-ton hand-operated hoists and slings requires a large number of workers, involves high labor intensity, takes a long time, is difficult to operate, and significantly impacts production time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a safe, reliable, and simpler and faster hydraulic cylinder replacement disc fork connection structure and hydraulic cylinder replacement method.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a disc fork arm connection structure, including two disc fork arms, each disc fork arm including a fork arm connecting end and a fork arm supporting end, at least two hydraulic cylinders are provided at the bottom of each disc fork arm, including a fork arm locking saddle, the fork arm connecting ends are connected by the fork arm locking saddle, the fork arm locking saddle includes at least two saddle holders, the saddle holders are respectively fixedly installed on the corresponding fork arm connecting ends, and the saddle holders are detachably connected by the saddle connection structure.

[0005] Furthermore, the saddle connection structure includes a connecting pin, and the saddle holder is provided with a pin hole, with the connecting pin disposed within the pin hole.

[0006] Furthermore, a pin limiting hole is provided at the end of the connecting pin, and a pin limiting pin is provided in the pin limiting hole.

[0007] Furthermore, the saddle seat includes a bottom welded edge, which is fixedly mounted on the fork arm connection end by welding.

[0008] Furthermore, the hydraulic cylinder replacement method includes the following steps: a) fabricating a saddle bracket that can be installed on the fork arm connection end according to the size of the fork arm connection end; b) welding the saddle bracket onto the fork arm connection end; c) adjusting the stroke of each hydraulic cylinder so that the two disc fork arms are at the same horizontal level, and inserting the connecting pin into the locking saddle to lock the disc fork arm; d) using the hydraulic cylinder of one disc fork arm to support the overall disc fork arm connection structure, depressurizing and draining the oil from one of the hydraulic cylinders of the other disc fork arm to be replaced, and then protectively removing the high-pressure hose and tubing of that hydraulic cylinder. e. Use a maintenance hoist to lift the hydraulic cylinder to be replaced in step d off the line, then lift the new hydraulic cylinder back on the line and install and adjust it into place. Then restore and debug the hydraulic pipeline. After debugging, the new hydraulic cylinder provides support. Then replace the remaining hydraulic cylinders of the disc fork arm in the same way. f. By repeating the procedures of steps d and e, complete the replacement of all hydraulic cylinders of another disc fork arm. g. Adjust the stroke of the new hydraulic cylinder through the hydraulic system, and protectively remove the connecting pin of the fork arm locking saddle. The replacement of the hydraulic cylinders of the disc fork arm is now complete.

[0009] The beneficial effects of this invention are as follows: In practical use, the connecting ends of the two forks are connected into a mutually supporting force-bearing whole by the fork arm locking saddle. Subsequently, the hydraulic cylinder at the bottom of one disc fork arm provides a supporting base, and the fork arm locking saddle provides support to the other disc fork arm. This ensures that even when the other disc fork arm loses support in its hydraulic cylinder section, it can still maintain overall stability, thereby enabling the disassembly and replacement of one of the hydraulic cylinders. In actual operation, only one hydraulic cylinder is replaced at a time, and the new hydraulic cylinder serves as the supporting base for subsequent hydraulic cylinder replacements, thus achieving the successive replacement of all hydraulic cylinders. This invention is particularly suitable for the maintenance process of disc fork arms on ladle rotary tables. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure formed during the actual use of the present invention.

[0011] Figure 2 This is a schematic diagram of the saddle holder of the present invention.

[0012] Figure 3 This is a schematic diagram of the connecting pin of the present invention.

[0013] Figure 4 This is a schematic diagram of the pin limiting pin of the present invention.

[0014] Figure 5 This is a schematic diagram of the fork arm locking saddle of the present invention.

[0015] Figure 6 This is a schematic diagram of the hydraulic cylinder of the present invention.

[0016] The following are marked in the figure: Disc fork arm 1, fork arm connecting end 11, fork arm support end 12, fork arm locking saddle 2, connecting pin 3, pin limiting hole 31, pin limiting pin 4, saddle seat 5, bottom welding edge 51, hydraulic cylinder 6. Detailed Implementation

[0017] The invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The disc fork arm connection structure shown includes two disc fork arms 1. Each disc fork arm 1 includes a fork arm connecting end 11 and a fork arm supporting end 12. At least two hydraulic cylinders 6 are provided at the bottom of each disc fork arm 1. A fork arm locking saddle 2 is included. The fork arm connecting ends 11 are connected via the fork arm locking saddle 2. The fork arm locking saddle 2 includes at least two saddle holders 5, which are respectively fixedly mounted on the corresponding fork arm connecting ends 11. The saddle holders 5 are detachably connected via a saddle connection structure. Generally, preferably, the saddle holder 5 includes a bottom welded edge 51, which is fixedly mounted on the fork arm connecting end 11 by welding.

[0019] The corresponding hydraulic cylinder replacement method includes the following steps: a) Based on the dimensions of the fork arm connecting end 11 of the disc fork arm 1, fabricate a saddle holder 5 that can be installed on the fork arm connecting end 11; b) Weld the saddle holder 5 onto the fork arm connecting end 11; c) Adjust the stroke of each hydraulic cylinder 6 so that the two disc fork arms 1 are at the same horizontal height, and insert the connecting pin 3 into the locking saddle to lock the disc fork arm 1; d) Use the hydraulic cylinder 6 of one of the disc fork arms 1 to support the overall disc fork arm connection structure, depressurize and drain the oil from one of the hydraulic cylinders 6 of the other disc fork arm 1 that needs to be replaced, and then protectively remove the high-pressure hose of that hydraulic cylinder 6. e. Use a maintenance hoist to lift the hydraulic cylinder 6 that needs to be replaced in step d off the line, then lift the new hydraulic cylinder 6 back on the line and install and adjust it into place. Then restore and debug the hydraulic pipeline. After debugging, the new hydraulic cylinder 6 provides support. Then replace the hydraulic cylinders 6 in the disc fork arm 1 that have not yet been replaced in the same way. f. By repeating the procedures of steps d and e, complete the replacement of all hydraulic cylinders 6 of the other disc fork arm 1. g. Adjust the stroke of the new hydraulic cylinder 6 through the hydraulic system, and protectively remove the connecting pin 3 of the fork arm locking saddle 2. The replacement of hydraulic cylinders 6 of disc fork arm 1 is completed.

[0020] As a preferred embodiment of the saddle connection structure, the saddle connection structure may include a connecting pin 3, with a pin hole provided on the saddle holder 5, and the connecting pin 3 disposed within the pin hole. For example... Figure 5 As shown, a pin limiting hole 31 can be further provided at the end of the connecting pin 3, and a pin limiting pin 4 is provided in the pin limiting hole 31. The pin limiting pin 4 is inserted into the pin limiting hole 31 to prevent the connecting pin 3 from falling out of the pin hole provided on the saddle holder 5, thereby ensuring the stability of the structure.

Claims

1. A method for replacing the hydraulic cylinder of a disc fork arm connecting structure, wherein the disc fork arm connecting structure includes two disc fork arms (1), characterized in that, Includes the following steps: a. Based on the dimensions of the fork arm connecting end (11) of the disc fork arm (1), a saddle bracket (5) that can be set on the fork arm connecting end (11) is made. b. Weld the saddle bracket (5) onto the fork arm connecting end (11); c. Adjust the stroke of each hydraulic cylinder (6) so that the two disc forks (1) are at the same horizontal height, and insert the connecting pin (3) into the saddle bracket (5) to lock the two disc forks (1). d. Each disc fork arm (1) is equipped with at least two hydraulic cylinders (6) at its bottom. The hydraulic cylinder (6) of one of the disc fork arms (1) is used to support the overall disc fork arm connection structure. One of the hydraulic cylinders (6) of the other disc fork arm (1) that needs to be replaced is depressurized and drained. Then, the high-pressure hose and pipe joint of the hydraulic cylinder (6) are removed protectively and marked for easy restoration. e. Use the maintenance hoist to lift the hydraulic cylinder (6) that needs to be replaced in step d off the line, then lift the new hydraulic cylinder (6) back onto the line and install and adjust it in place. Then restore and debug the hydraulic pipeline. After debugging, the new hydraulic cylinder (6) provides support. Then replace the hydraulic cylinders (6) in the disc fork arm (1) that have not yet been replaced in the same way. f. By repeating the steps d and e, complete the replacement of all hydraulic cylinders (6) of the other disc fork arm (1); g. Adjust the stroke of the new hydraulic cylinder (6) through the hydraulic system, and protectively remove the connecting pin (3) of the fork arm locking saddle (2). The replacement of the hydraulic cylinder (6) of the disc fork arm (1) is completed.

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