Improved hot-metal ladle trunnion

Abstract

A trunnion body is in a stepped cylinder shape, the inner end of the trunnion body is installed in a trunnion seat hole, a round flat gasket is fixedly sleeved on the portion of the trunnion body which is longer than the trunnion seat hole, a groove is arranged on an outer port of the trunnion seat hole, and a conical backing ring is fixedly connected in the groove. The hot-metal ladle trunnion welding device prevents the hot-metal ladle trunnion body at the same position from being welded more than two times, prolongs the service life of a hot-metal ladle, is simple in structure and convenient to implement, reduces the hot-metal ladle purchasing cost of an enterprise, and ensures the use safety of the hot-metal ladle.

Description

Technical Field

[0001] The utility model relates to molten iron tank equipment for containing and transferring molten iron in a steel plant, in particular to an improved molten iron tank trunnion. Background Art

[0002] The molten iron ladle is a key equipment for holding and transporting molten iron in the ironmaking production process of a steel plant. It cooperates with its own trunnion and hook to complete the lifting of the molten iron ladle. The inner end of the trunnion body 1 of the molten iron ladle currently used in steel plants is installed in the trunnion seat 2 (such as Figure 1 As shown), the protruding part is welded to the inner side of the tank wall 3; the total length of the ear shaft body 1 is A, the inner end thereof is 25 mm longer than the inner hole of the ear shaft seat 2, the outer diameter of the inner end is B, the small outer diameter of the outer end is C, and the large outer diameter of the outer end is D, wherein D>B>C; the outer end of the ear shaft body 1 is welded at the intersection with the outer end of the ear shaft seat 2; the refractory brick 4 finally blocks the welding position inside the tank.

[0003] When the wear of the trunnion body 1 reaches the relevant standards, it should be replaced. According to the standard specification, the number of welding times of important steel structure parts at the same position should be ≤ 2 times. If the trunnion body 1 structure currently used is used, when the trunnion of the molten iron ladle is welded and used twice, the entire molten iron ladle should be scrapped, which will increase the procurement cost of the enterprise's molten iron ladle equipment and is not conducive to the production and operation of the enterprise. Utility Model Content

[0004] In view of the above situation, the entire molten iron tank will be scrapped and the purchase cost of the molten iron tank equipment will be increased. The utility model provides an improved molten iron tank trunnion, which can weld the original molten iron tank trunnion body more than twice to extend the overall service life of the molten iron tank, which is beneficial for enterprises to reduce the purchase cost of the molten iron tank.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an improved trunnion of a molten iron ladle, wherein the trunnion body is in a stepped cylindrical shape, the inner end diameter of which is larger than the outer end diameter and equal to the outer end diameter; the inner end of the trunnion body is installed in the trunnion seat hole, and a round flat washer is fixedly mounted on the part of the trunnion body extending out of the inner hole of the trunnion seat, and a groove is provided at the outer end of the inner hole of the trunnion seat, and a conical gasket is fixedly connected in the groove.

[0006] Furthermore, the length of the inner end of the ear shaft body is longer than the length of the inner hole of the ear shaft seat and is twice the thickness of the round flat pad.

[0007] Furthermore, the outer end surface of the trunnion seat is flush with the outer end surface of the inner end of the trunnion body.

[0008] The utility model avoids the phenomenon that welding is performed more than twice at the same position of the trunnion body of the molten iron tank, prolongs the service life of the molten iron tank, has a simple structure and is easy to implement, reduces the cost of purchasing the molten iron tank for enterprises, and ensures the safety of the use of the molten iron tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the trunnion structure of the hot metal ladle before improvement;

[0010] Figure 2 This is a schematic diagram of the trunnion structure of the molten iron tank of the utility model.

[0011] In the figure: 1. trunnion body, 2. trunnion seat, 3. tank wall, 4. refractory bricks, 5. round flat gasket, 6. conical gasket ring. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings. Figure 2 An improved trunnion for a molten iron ladle, wherein the trunnion body 1 is in a stepped cylindrical shape, the inner end diameter of which is larger than the outer end diameter and equal to the outer end diameter; the inner end of the trunnion body 1 is installed in the hole of the trunnion seat 2, and a round flat washer 5 is fixedly mounted on the part of the trunnion body 1 extending out of the inner hole of the trunnion seat 2, and the outer end surface of the trunnion seat 2 is flush with the outer end surface of the inner end of the trunnion body 2. A groove is provided at the outer end of the inner hole of the trunnion seat 2, and a conical gasket 6 is fixedly connected in the groove. The length of the inner end of the trunnion body 1 is longer than the length of the inner hole of the trunnion seat 2, and the extended part is twice the thickness of the round flat washer 5.

[0013] Embodiment: Now, a preferred embodiment of the present invention is introduced. The specific method is as follows:

[0014] Step 1: Survey and draw the detailed drawings of the trunnion of the molten iron ladle before improvement: the total length of the trunnion body 1 of the molten iron ladle before improvement is A, the inner end is 25mm longer than the inner hole of the trunnion seat 2, the inner end outer diameter is B, the outer end small outer diameter is C, and the outer end large outer diameter is D (such as Figure 1 as shown).

[0015] Step 2: Improve the measured dimensions of the trunnion body 1 of the molten iron ladle: increase the total length of the trunnion body 1 by 25mm, that is, the total length is A+25, and the diameter B section is increased by 25mm, while the lengths of the diameters C and D sections remain unchanged. Then use a 25mm thick steel plate to make a round flat washer 5, the inner diameter of the round flat washer 5 is B+2mm, and the outer diameter of the round flat washer 5 is B+50mm. Then use a 35mm thick steel plate to make a conical gasket ring 6, the inner diameter of the conical gasket ring 6 is B+1mm, the outer diameter of the conical gasket ring 6 is B+30mm, and a large groove is set on one side of the outer circle and a small groove is set on the other side of the inner hole (such as Figure 2 as shown).

[0016] The third step: install the trunnion body 1: first, open a groove on the outer end of the inner hole of the trunnion seat 2, and its groove angle and size are consistent with the large groove of the outer circle of the tapered gasket 6. Then, the tapered gasket 6 is inserted into the improved trunnion 1 of the molten iron tank, and the outer circle is provided with a groove direction facing inward, and then the trunnion body 1 is installed into the inner hole of the trunnion seat 2, and the outer end face of the trunnion seat 2 is flush with the outer end face of the inner end of the trunnion body 1, and then the tapered gasket 6 is installed into the groove of the outer end of the inner hole of the trunnion seat 2, and the round flat gasket 5 is installed on the part of the trunnion body 1 extending out of the inner hole of the trunnion seat 2. All the joints are welded firmly, and the original welding positions are staggered. Finally, the welding position in the tank is blocked with refractory bricks 4 (such as Figure 2 as shown).

[0017] The utility model is to lengthen the trunnion body 1, insert a round flat washer 5 on the inner side, and embed a conical washer ring 6 on the outer side, thereby staggering the original welding positions, thereby avoiding welding the trunnion body 1 at the same position more than twice. According to the feedback from the production unit, the use effect is good, safe and smooth, and the service life of the molten iron tank can be extended.

Claims

1. An improved trunnion of a molten iron ladle, characterized in that: The ear shaft body is in a stepped cylindrical shape, and its inner end diameter is larger than the outer end diameter and equal to the outer end head diameter; the inner end of the ear shaft body is installed in the ear shaft seat hole, and the part of the ear shaft body extending out of the inner hole of the ear shaft seat is fixedly sleeved with a round flat washer, and the outer end of the inner hole of the ear shaft seat is provided with a groove, and a conical gasket is fixedly connected in the groove.

2. The improved ladle trunnion according to claim 1, characterized in that: The length of the inner end of the trunnion body is longer than the length of the inner hole of the trunnion seat and is twice the thickness of the round flat pad.

3. The improved iron ladle trunnion according to claim 1, characterized in that: The outer end surface of the trunnion seat is flush with the outer end surface of the inner end of the trunnion body.

Images