A ladle trunnion positioning tool

Abstract

The invention discloses a ladle trunnion positioning tool, comprising: a positioning mandrel and a mounting frame; a trunnion inner hole positioning structure capable of extending into the inner hole of the trunnion is respectively arranged at the front and rear of the positioning mandrel, the trunnion inner hole positioning structure is: two shaft rings are arranged at intervals on the mandrel, the mandrel extends into the inner hole of the trunnion until the two shaft rings are both located in the inner hole of the trunnion, and the spacer sleeved on the mandrel is inserted into the gap between the two shaft rings and the inner hole wall of the trunnion; a trunnion peripheral positioning structure for clamping the trunnion is respectively fixedly arranged at the front and rear of the mounting frame, the trunnion peripheral positioning structure is: the female mold of the half fixed block is fixedly installed on the mounting frame, the male mold of the half fixed block is fastened to the female mold by a fastener, and the trunnion is clamped in the mounting through hole composed of the male mold and the female mold. The above structure is simple, easy to use, and can ensure the coaxiality accuracy and verticality accuracy requirements of the trunnion installation.

Description

Technical Field

[0001] The invention relates to an auxiliary tool for ladle processing, in particular to a ladle trunnion positioning tool. Background Art

[0002] In the metallurgical industry, molten steel for steelmaking and ironmaking is stored and transported in large ladles, such as the 320-ton ladle used by ArcelorMittal Dunkirk Steel Plant, which stores 1580°C liquid steel during operation. To ensure the safety of enterprise production, the molten steel in the ladle must not overflow when the ladle is fully loaded and hoisted. Therefore, the stability of the ladle during hoisting and lifting is the most important part of the ladle design and manufacturing process.

[0003] In order to ensure that the ladle is stable and not tilted during the lifting and hoisting process, the installation accuracy of the trunnion is very high: a pair of trunnions need to ensure a very high coaxiality accuracy and verticality accuracy. At present, the installation method of the trunnion 12 with the star-shaped rib plate 11 on the ladle 1 is mainly welding, such as Figure 1 and Figure 2 As shown, the position of the ear shaft 12 will inevitably shift and the shape of the ear shaft 12 will deform during the welding process, thereby affecting the coaxiality accuracy and verticality accuracy of a pair of ear shafts, and further affecting the stability of the ladle during lifting and hoisting, posing a safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a ladle trunnion positioning tool which has a simple structure, is easy to use and can ensure that the coaxiality accuracy and verticality accuracy of the trunnion installation meet the requirements.

[0005] To solve the above problems, the technical solution adopted by the present invention is: the ladle ear shaft positioning tool described herein comprises: a positioning core shaft, and a mounting frame that can be mounted on the top of the ladle; an ear shaft inner hole positioning structure that can be inserted into the inner hole of the ear shaft is respectively arranged at the front part and the rear part of the positioning core shaft, and the ear shaft inner hole positioning structure is: two shaft rings are arranged on the core shaft from front to back at intervals, and a first external chamfer is cut at the front end and the rear end of each shaft ring, and the core shaft extends into the inner hole of the ear shaft until the two shaft rings are located in the inner hole of the ear shaft, and the spacer sleeve mounted on the core shaft extends into the gap between the two shaft rings and the inner hole wall of the ear shaft to clamp the inner hole wall of the ear shaft; the setting of each first external chamfer is used to guide the spacer sleeve to be more smoothly inserted into the gap between the two shaft rings and the inner hole wall of the ear shaft. An ear shaft peripheral positioning structure for clamping the ear shaft is fixedly arranged at the front and rear of the mounting frame respectively. The ear shaft peripheral positioning structure is as follows: the female mold of the Huff fixing block is fixedly installed on the mounting frame, the male mold of the Huff fixing block is fastened to the female mold by fasteners, and the ear shaft is clamped in the mounting through hole formed by the combination of the male mold and the female mold.

[0006] In order to make the Huff fixing block clamp the ear shaft better, a circle of copper sheet is placed around the installation through hole of the Huff fixing block. When the Huff fixing block clamps the ear shaft, the copper sheet is located between the hole wall of the installation through hole and the outer wall of the ear shaft. The copper sheet also protects the outer wall of the ear shaft and the hole wall of the installation through hole. Of course, the surrounding copper sheet can also make it easier to disassemble the ladle ear shaft positioning tooling later.

[0007] In this solution, the thickness range of the copper skin is preferably 0.2±0.05 mm, wherein the optimal thickness of the copper skin is 0.2 mm.

[0008] Further, in the aforementioned ladle trunnion positioning tool, the angle α of the first external chamfer cut at the front and rear ends of each collar is 10±0.1°, and the length H1 of the first external chamfer cut at the front and rear ends of each collar is 15±1 mm. The angle α of the first external chamfer is preferably 10°, and the length H1 of the first external chamfer is preferably 15 mm.

[0009] In order to further improve the smoothness of the insertion of the spacer into the gap between the two shaft rings and the inner hole wall of the ear shaft, the present solution cuts a second outer chamfer at the end of the outer wall of the insertion end of the spacer inserted into the gap between the two shaft rings and the inner hole wall of the ear shaft, the angle β of the second outer chamfer is 10±0.1°, and the length H2 of the second outer chamfer is 15±1mm; wherein, the angle β of the second outer chamfer is preferably 10°, and the length H2 of the second outer chamfer is preferably 15mm. An inner chamfer is cut at the end of the inner hole wall of the insertion end of the spacer inserted into the gap between the two shaft rings and the inner hole wall of the ear shaft. The second outer chamfer and the inner chamfer also serve to protect the insertion end of the spacer.

[0010] One end of the spacer is an insertion end extending into the gap between the two shaft rings and the inner hole wall of the ear shaft, and the other end of the spacer is provided with a flange, and at least one threaded through hole is opened on the flange. Bolts can pass through the threaded through hole and be fastened to the inner side of the ladle. This arrangement facilitates the installation and disassembly of the spacer.

[0011] Furthermore, the aforementioned ladle ear shaft positioning tool, wherein the installation frame includes: a first boom placed in the horizontal front-to-back direction, a second boom placed horizontally, a third boom placed horizontally, and a fourth boom placed horizontally; first vertical connecting arms hanging downward are respectively provided at the front and rear ends of the first boom, and the two ear shaft peripheral positioning structures are respectively fixed to the bottoms of the two first vertical connecting arms; the middle part of the second boom is fixedly installed at the middle part of the first boom and the long side of the second boom is placed in a vertical direction relative to the long side of the first boom, and second vertical connecting arms hanging downward are respectively provided at the left and right ends of the second boom Connecting arm; the middle part of the third boom is fixedly installed on the front part of the first boom and the long side of the third boom is parallel to the long side of the second boom, and the third vertical connecting arm hanging down is respectively provided at the left and right ends of the third boom; the middle part of the fourth boom is fixedly installed on the rear part of the first boom and the long side of the fourth boom is parallel to the long side of the second boom, and the fourth vertical connecting arm hanging down is respectively provided at the left and right ends of the fourth boom; a plurality of connecting beams sequentially connect the two ear shaft peripheral positioning structures, the two second vertical connecting arm bottom ends, the two third vertical connecting arm bottom ends, and the two fourth vertical connecting arm bottom ends to form a square frame structure. When the installation frame is mounted on the top of the ladle, the square frame structure is mounted on the periphery of the ladle, and the first boom is placed on the upper end surface of the ladle.

[0012] Furthermore, in the aforementioned ladle trunnion positioning tool, the long side length of the third suspension arm is equal to the long side length of the fourth suspension arm, and the long side length of the third suspension arm is less than the long side length of the second suspension arm. This arrangement can reduce the consumables of the installation frame while ensuring the supporting strength of the installation frame.

[0013] In order to further improve the overall supporting strength of the installation frame, the present solution has a first reinforcing beam fixedly arranged between the connecting beams fixedly connected to each other, a reinforcing rib plate fixedly arranged between the connecting beam fixedly connected to the ear shaft positioning structure and the ear shaft peripheral positioning structure, and a second reinforcing beam is respectively arranged between the first boom and the two first vertical connecting arms, between the second boom and the two second vertical connecting arms, between the third boom and the two third vertical connecting arms, and between the fourth boom and the two fourth vertical connecting arms.

[0014] The beneficial effects of the present invention are as follows: the ladle trunnion positioning tooling has a simple structure, is easy to use, can ensure that the coaxiality accuracy and verticality accuracy of a pair of trunnions after installation meet the requirements, thereby ensuring the stability of the ladle during lifting and hoisting, and improving the safety performance of the ladle in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure in which a pair of trunnions are installed on the ladle.

[0016] Figure 2 yes Figure 1Schematic diagram of the structure of the trunnion with star-shaped ribs when viewed from the left.

[0017] Figure 3 It is a structural schematic diagram of a ladle trunnion positioning tooling described in the present invention.

[0018] Figure 4 yes Figure 1 A schematic structural diagram of the ear shaft peripheral positioning structure installed at the bottom of the first vertical connecting arm.

[0019] Figure 5 It is a plan view of the peripheral positioning structure of the ear shaft.

[0020] Figure 6 The utility model is a schematic diagram of the use state of a ladle trunnion positioning tool set according to the present invention being mounted on a ladle.

[0021] Figure 7 yes Figure 6 Schematic diagram of the structure from the left view direction.

[0022] Figure 8 yes Figure 7 Schematic diagram of the local structure in the AA section direction.

[0023] Fig. 9 yes Figure 8 Schematic diagram of the local enlarged structure in.

[0024] Fig.10 yes Fig. 9 Schematic diagram of the local enlarged structure of part B.

[0025] Fig.11 yes Fig. 9 Schematic diagram of the local enlarged structure of part C in the middle.

[0026] Fig.12 yes Fig.11 Schematic diagram of the partially enlarged structure of the core shaft.

[0027] Fig.13 yes Fig.11 Schematic diagram of the partial enlarged structure of the septum sleeve. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] Embodiment 1

[0030] The weight of the ladle 1 is very heavy, especially for large ladle, such as the 320-ton ladle used in the ArcelorMittal Dunkirk Steel Plant. In order to improve the overall strength of the trunnion 12 and ensure the smooth progress of the subsequent ladle lifting work, Figure 1 and Figure 2As shown, a star-shaped rib plate 11 needs to be added to the ear shaft 12. The star-shaped rib plate 11 and the ear shaft 12 are currently welded to the ladle 1 by welding. During the welding process, it is inevitable that the position of the ear shaft 12 will be offset and the shape of the ear shaft 12 will be deformed. In view of this problem, this scheme designs a ladle ear shaft positioning tool to prevent the welding stress generated when welding the ear shaft 12 and the star-shaped rib plate 11 from causing the ear shaft to shift and deform, thereby ensuring that the coaxiality accuracy and verticality accuracy of a pair of ear shafts 12 after installation always meet the requirements.

[0031] like Figure 3 , Figure 6 and Figure 7 As shown, a ladle trunnion positioning tool described in this embodiment includes: a positioning mandrel 2, and a mounting frame 3 that can be mounted on the top of the ladle 1. A trunnion inner hole positioning structure that can extend into the inner hole of the trunnion 12 is respectively arranged at the front part of the positioning mandrel 2 and the rear part of the positioning mandrel 2. A trunnion peripheral positioning structure that clamps the trunnion 12 is respectively fixedly arranged at the front part of the mounting frame 3 and the rear part of the mounting frame 3.

[0032] like Figure 8 , Fig. 9 and Fig.11 As shown, the ear shaft inner hole positioning structure described in this embodiment is: two shaft rings 21 are arranged at intervals from front to back on the core shaft 2, and a first outer chamfer 211 is cut at the front and rear ends of each shaft ring 21. After the core shaft 2 is inserted into the inner hole of the ear shaft 12 until the two shaft rings 21 are both located in the inner hole of the ear shaft 12, the spacer 4 sleeved on the core shaft 2 is inserted into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12 to clamp the inner hole wall of the ear shaft 12. When disassembly is required, the spacer 4 can be pulled out from the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12 in the opposite direction.

[0033] The first outer chamfers 211 are provided to guide the spacer 4 to be inserted more smoothly into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12. Fig.12 As shown, in this solution, the angle α of the first outer chamfer 211 cut at the front and rear ends of each collar 21 is 10±0.1°, and the length H1 of the first outer chamfer 211 cut at the front and rear ends of each collar 21 is 15±1 mm. Among them, the angle α of the first outer chamfer 211 is preferably 10°, and the length H1 of the first outer chamfer 211 is preferably 15 mm.

[0034] In order to further improve the smoothness of the spacer 4 being inserted into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12, the outer wall end of the insertion end of the spacer 4 extending into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12 is cut with a second outer chamfer 41, such as Fig.13As shown, the angle β of the second outer chamfer 41 is 10±0.1°, and the length H2 of the second outer chamfer 41 is 15±1mm. Among them, the angle β of the second outer chamfer 41 is preferably 10°, and the length H2 of the second outer chamfer 41 is preferably 15mm. An inner chamfer 42 is cut at the end of the inner hole wall of the insertion end of the spacer 4 that extends into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12. The provision of the second outer chamfer 41 and the inner chamfer 42 can also prevent the spacer 4 from colliding during the process of being inserted into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12, thereby protecting the insertion end of the spacer 4.

[0035] like Fig. 9 As shown, one end of the spacer 4 is an insertion end extending into the gap between the two shaft rings 21 and the inner hole wall of the ear shaft 12, and the other end of the spacer 4 is provided with a flange 43, and at least one threaded through hole 431 is opened on the flange 43. Bolts can pass through the threaded through hole 431 and be fastened to the inner side of the ladle 1. This arrangement facilitates the installation and disassembly of the spacer 4.

[0036] like Figure 4 and Figure 5 As shown, the ear shaft peripheral positioning structure described in this embodiment is: the female mold 51 of the Hough fixing block 5 is fixedly installed on the mounting frame 3, and the male mold 52 of the Hough fixing block 5 is fastened to the female mold 51 by fasteners such as bolts, and the ear shaft 12 is clamped in the mounting through hole 53 formed by the combination of the male mold 52 and the female mold 51.

[0037] In order to make the Hough fixing block 5 better clamp the trunnion 12, as shown in FIG. Fig.10 As shown, a circle of copper sheet 54 surrounds the installation through hole 53 of the half fixing block 5. When the half fixing block 5 clamps the ear shaft 12, the copper sheet 54 is located between the hole wall of the installation through hole and the outer wall of the ear shaft. Of course, the surrounding arrangement of a circle of copper sheet 54 can also make it easier to disassemble the ladle ear shaft positioning tooling later. The thickness of the copper sheet 54 is preferably selected to be 0.2±0.05mm, wherein the thickness of the copper sheet 54 is preferably 0.2mm.

[0038] The ladle trunnion positioning fixture of the above structure is simple in structure and easy to use, and can ensure that the coaxiality accuracy and verticality accuracy of a pair of trunnions after installation meet the requirements, thereby ensuring the stability of the ladle during lifting and hoisting, and improving the safety performance of the ladle.

[0039] Embodiment 2

[0040] This embodiment is based on the first embodiment and further optimizes the structure of the mounting frame 3, as follows. Figure 3As shown, the mounting frame 3 described in this embodiment includes: a first boom 6 placed horizontally in the front-to-back direction, a second boom 7 placed horizontally, a third boom 8 placed horizontally, and a fourth boom 9 placed horizontally. First vertical connecting arms 61 hanging downward are respectively provided at the front and rear ends of the first boom 6, and two ear shaft peripheral positioning structures are respectively fixed to the bottom of the two first vertical connecting arms 61. The middle part of the second boom 7 is fixedly installed at the middle part of the first boom 6 and the long side of the second boom 7 is placed in a vertical direction relative to the long side of the first boom 6, and second vertical connecting arms 71 hanging downward are respectively provided at the left and right ends of the second boom 7. The middle part of the third boom 8 is fixedly installed at the front part of the first boom 6 and the long side of the third boom 8 is parallel to the long side of the second boom 7, and third vertical connecting arms 81 hanging downward are respectively provided at the left and right ends of the third boom 8. The middle part of the fourth boom 9 is fixedly installed at the rear part of the first boom 6 and the long side of the fourth boom 9 is parallel to the long side of the second boom 7. The fourth vertical connecting arms 91 hanging downward are respectively arranged at the left and right ends of the fourth boom 9. A plurality of connecting beams 10 sequentially connect the two ear shaft peripheral positioning structures, the bottom ends of the two second vertical connecting arms 71, the bottom ends of the two third vertical connecting arms 81, and the bottom ends of the two fourth vertical connecting arms 91 to form a square frame structure 100. When the mounting frame 3 is mounted on the top of the ladle, the square frame structure 100 is mounted on the periphery of the ladle 1, and the first boom 6 is placed on the upper end surface of the ladle 1.

[0041] The long side length of the third suspension arm 8 is equal to the long side length of the fourth suspension arm 9, and the long side length of the third suspension arm 8 is less than the long side length of the second suspension arm 7. This arrangement can reduce the overall consumables of the installation frame 3 and ensure the overall support strength of the installation frame 3.

[0042] In order to further improve the overall supporting strength of the mounting frame 3, the present solution has a first reinforcing beam 101 fixedly arranged between the connecting beams 10 fixedly connected to each other, a reinforcing rib plate 102 fixedly arranged between the connecting beam 10 fixedly connected to the ear shaft positioning structure and the ear shaft peripheral positioning structure, and a second reinforcing beam 103 is respectively arranged between the first boom 6 and the two first vertical connecting arms 61, between the second boom 7 and the two second vertical connecting arms 71, between the third boom 8 and the two third vertical connecting arms 81, and between the fourth boom 9 and the two fourth vertical connecting arms 91.

[0043] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A ladle trunnion positioning tool, characterized in that: include: A positioning mandrel and a mounting frame that can be sleeved on the top of the ladle; an ear shaft inner hole positioning structure that can extend into the inner hole of the ear shaft is respectively arranged at the front part and the rear part of the positioning mandrel, and the ear shaft inner hole positioning structure is as follows: two shaft rings are arranged on the mandrel from front to back, and a first external chamfer is cut at the front end and the rear end of each shaft ring. After the mandrel extends into the inner hole of the ear shaft until the two shaft rings are both located in the inner hole of the ear shaft, the spacer sleeved on the mandrel is inserted into the gap between the two shaft rings and the inner hole wall of the ear shaft to clamp the inner hole wall of the ear shaft; an ear shaft peripheral positioning structure that clamps the ear shaft is respectively fixedly arranged at the front part and the rear part of the mounting frame, and the ear shaft peripheral positioning structure is as follows: the female mold of the half fixed block is fixedly installed on the mounting frame, and the male mold of the half fixed block is fastened to the female mold by a fastener, and the ear shaft is clamped in the mounting through hole composed of the male mold and the female mold; The installation frame comprises: a first boom placed horizontally in the front-to-back direction, a second boom placed horizontally, a third boom placed horizontally, and a fourth boom placed horizontally; A first vertical connecting arm hanging downward is respectively provided at the front and rear ends of the first boom, and two ear shaft peripheral positioning structures are respectively fixed to the bottom of the two first vertical connecting arms; the middle part of the second boom is fixedly installed on the middle part of the first boom and the long side of the second boom is placed in a vertical direction relative to the long side of the first boom, and a second vertical connecting arm hanging downward is respectively provided at the left and right ends of the second boom; the middle part of the third boom is fixedly installed on the front part of the first boom and the long side of the third boom is parallel to the long side of the second boom, and a third vertical connecting arm hanging downward is respectively provided at the left and right ends of the third boom; the middle part of the fourth boom is fixedly installed on the rear part of the first boom and the long side of the fourth boom is parallel to the long side of the second boom, and a fourth vertical connecting arm hanging downward is respectively provided at the left and right ends of the fourth boom; a number of connecting beams sequentially connect the two ear shaft peripheral positioning structures, the bottom ends of the two second vertical connecting arms, the bottom ends of the two third vertical connecting arms, and the bottom ends of the two fourth vertical connecting arms to form a square frame structure.

2. A ladle trunnion positioning tool according to claim 1, characterized in that: A circle of copper sheet surrounds the mounting through hole of the Haff fixing block. When the Haff fixing block clamps the ear shaft, the copper sheet is located between the hole wall of the mounting through hole and the outer side wall of the ear shaft.

3. A ladle trunnion positioning tool according to claim 2, characterized in that: The thickness of the copper sheet is 0.2±0.05mm.

4. A ladle trunnion positioning tool according to claim 1, 2 or 3, characterized in that: The angle α of the first outer chamfer cut at the front end and the rear end of each collar is 10±0.1°, and the length H1 of the first outer chamfer cut at the front end and the rear end of each collar is 15±1 mm.

5. The ladle trunnion positioning tool according to claim 4, characterized in that: A second outer chamfer is cut at the end of the outer wall of the insertion end of the spacer sleeve extending into the gap between the two shaft rings and the inner hole wall of the ear shaft, the angle β of the second outer chamfer is 10±0.1°, and the length H2 of the second outer chamfer is 15±1mm; an inner chamfer is cut at the end of the inner hole wall of the insertion end of the spacer sleeve extending into the gap between the two shaft rings and the inner hole wall of the ear shaft.

6. A ladle trunnion positioning tool according to claim 5, characterized in that: One end of the spacer is an insertion end inserted into the gap between the two shaft rings and the inner hole wall of the ear shaft, and the other end of the spacer is provided with a flange, and at least one threaded through hole is opened on the flange.

7. The ladle trunnion positioning tool according to claim 1, characterized in that: The length of the long side of the third boom is equal to the length of the long side of the fourth boom, and the length of the long side of the third boom is shorter than the length of the long side of the second boom.

8. A ladle trunnion positioning tool according to claim 1 or 7, characterized in that: A first reinforcing beam is fixedly arranged between the connecting beams fixedly connected to each other, a reinforcing rib plate is fixedly arranged between the connecting beam fixedly connected to the ear shaft positioning structure and the ear shaft peripheral positioning structure, and a second reinforcing beam is respectively arranged between the first boom and the two first vertical connecting arms, between the second boom and the two second vertical connecting arms, between the third boom and the two third vertical connecting arms, and between the fourth boom and the two fourth vertical connecting arms.

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