CN101992375B - Process method for replacing trunnion of ladle - Google Patents

Abstract

The invention discloses a method for removing a trunnion during the replacement of a trunnion of a ladle, which comprises the following steps: cutting the part of a trunnion of a ladle, which extends out of the ladle, so as to form an end face; planning the weld joint at the connected part of the trunnion and the ladle; heating at least one point of the end face of the trunnion with acetylene flame so as to melt the end face of the trunnion; blowing oxygen to a molten point by using a high-pressure oxygen lance till a hole is blown; quickly cooling the part of the trunnion by using a cold water pipe and creating a gap between the trunnion and the ladle body; quickly striking the trunnion, and separating the trunnion from the ladle body. The process method of the invention is a more advanced clearance fit machine part maintenance and detachment technique and has a high utilization value in metallurgical machine industry.

Description

A kind of process of in changing the ladle gudgeon, removing gudgeon

One: technical field

The invention discloses a kind of process of in changing the ladle gudgeon, removing gudgeon, belong to machine-building maintenance technique field.

Two: background technology

For steel and iron industry, ladle, hot-metal bottle are commonly used and indispensable equipment, smelt at molten steel; Have bad luck, each link of cast can be seen the figure of these bag jars, and the service life of steel ladle, hot-metal bottle is very big to the cost impact of iron and steel enterprise; Simultaneously, because ladle, iron flask are used for splendid attire molten steel, molten iron, temperature is very high; Lifting, having bad luck in the process and can bring very big potential safety hazard, therefore guaranteeing that the safety of ladle, hot-metal bottle is the most important thing of iron and steel enterprise surrounding environment.

Ladle, iron flask must thoroughly be checked it after using some cycles, search security breaches; In time repair; Ladle, iron flask the weakest link are the gudgeon positions, use certain hour after, three kinds of situation potential safety hazards possibly appear in the gudgeon position: the one, gudgeon and inclusion weld cracking; The 2nd, Ear Abrasion is serious, and the 3rd, gudgeon raw material tissue defects extends.This three kinds of situation appear, soldering immediately or replacing ladle gudgeon.

Change the first step operation of gudgeon and must remove former ladle gudgeon, because ladle gudgeon and tank body are interference fit, hot charging and the structure that is welded as a whole with inclusion; The workload of removing gudgeon is very big; Often to dig and snap seam, change job shop processing removal, time and effort consuming at welding shop; To in batches big replacing gudgeon, find a kind of removal gudgeon method that saves time, practices thrift cost imperative.

Research shows, when the syndeton of interference fit is dismantled, utilizes the rising-heat contracting-cold of material, promptly apertured plate member is heated, and relatively easily separates cooperating workpiece to carry out freezing method with the hole.But for the separation of ladle gudgeon, because the inclusion position is relatively large, it is not obvious that inclusion is carried out heats, must handle gudgeon, because inclusion can't heat, only the method for freezing gudgeon is obviously also inadvisable.

Three: summary of the invention

For solving the problems of the technologies described above, the present invention provides a kind of process of in changing the ladle gudgeon, removing gudgeon, and the present invention can change the ladle gudgeon simply, efficiently.

For achieving the above object, the technical scheme that the present invention adopted is following:

A kind of process of in changing the ladle gudgeon, removing gudgeon may further comprise the steps:

A, the ladle gudgeon is stretched out ladle position cutting remove and form end face;

B, plane ear falling axle and inclusion junction weld seam;

C, at the place more at least of gudgeon end face with oxy-acetylene flame heating, make it to melt;

D, with the high pressure oxygen lance melting point is carried out oxygen blast, until blowing out the hole;

E, with cold water pipe the gudgeon position is cooled off rapidly, gudgeon and inclusion produce the gap;

F, beat gudgeon fast, gudgeon is separated with inclusion.

In the process of above-mentioned replacing ladle gudgeon, utilize oxy-acetylene flame to heat at three positions of gudgeon end face among the said step c, these three positions keep at a certain distance away and shape triangular in shape.

Operation principle of the present invention and beneficial effect show:

The gudgeon ladle is stretched out part outward cut off, in adding thermal expansion and cooling procedure, heating and good cooling results, resource utilization is high, has avoided causing the situation of unnecessary waste.

Weld seam is dug, reduced on the one hand the bonding strength of gudgeon and ladle, both separation when helping heat on the other hand and rising by shrinkage afterwards.

On the end face of gudgeon, utilize oxy-acetylene to heat, utilize the high pressure oxygen lance to carry out oxygen blast again, until blowing out the hole facing to metal liquefaction position; In this process; Because gudgeon has been carried out Fast Heating, gudgeon expands rapidly, and extruding gudgeon and ladle connecting hole expand outwardly; And then cool off with cold water pipe centering gudgeon position rapidly; Gudgeon cools off rapidly, and shrink to gudgeon in the hole during shrinkage provides the space, shrinks in the ear axial hole; This moment, gudgeon and inclusion connecting portion formed gap in short-term; Utilize this process in short-term, one strike gently with hammer, gudgeon just separates with inclusion.

In the heating process, can select gudgeon heated and blow the hole at 3, improve the efficiency of heating surface on the one hand; On the other hand 3 to compare 2 heating more even; Compare 4 even more its heating position of multiple spot is few, it is few to have the resource use amount, become low this, advantage such as replacing speed is fast.

Four: description of drawings

Fig. 1 cuts position, hole form for the oxygen blast of gudgeon position;

Fig. 2 is the ladle structural representation;

Among the figure: 1, ladle; 2, gudgeon; 3, hole.

Five: the specific embodiment:

Describe the present invention below in conjunction with accompanying drawing and specific embodiment:

A kind of process of in changing the ladle gudgeon, removing gudgeon, the ladle structural representation is as shown in Figure 2.

At first gudgeon 2 is stretched out the ladle position and cut off, and dig ear falling axle 1 and inclusion junction weld seam;

Utilize the oxy-acetylene flame cutting torch to heat at the end face of the gudgeon 2 triangularity shape that keeps at a certain distance away then, make this three position metals liquefaction;

After the liquefaction of position to be heated metal, utilize the high pressure oxygen lance to carry out oxygen blast, blow out three holes 3 at these several positions by the chemical reaction of iron and oxygen facing to these three positions; As shown in Figure 1, in this process, because gudgeon 2 has been carried out Fast Heating; Gudgeon 2 expands rapidly, and extruding gudgeon 2 expands outwardly with ladle 1 connecting hole, and then cools off with cold water pipe centering gudgeon position rapidly; Gudgeon 2 cools off rapidly, shrinks to 3 positions, three holes of cutting out, and at this moment gudgeon 2 forms gap in short-term with inclusion 1 connecting portion; Utilize this process in short-term, one strike gently with hammer, gudgeon 2 just separates with inclusion 1.

This shows that the present invention compared with prior art makes that changing the ladle gudgeon becomes simple, convenient, fast.The favourable connectivity robustness that has guaranteed gudgeon and ladle has strengthened the security in the smelting process.

Claims (2)

1. process of in changing the ladle gudgeon, removing gudgeon is characterized in that: may further comprise the steps:

A, the ladle gudgeon is stretched out ladle position cutting remove and form end face;

B, plane ear falling axle and inclusion junction weld seam;

C, at the place more at least of gudgeon end face with oxy-acetylene flame heating, make it to melt;

D, with the high pressure oxygen lance melting point is carried out oxygen blast, until blowing out the hole;

E, with cold water pipe the gudgeon position is cooled off rapidly, gudgeon and inclusion produce the gap;

F, beat gudgeon fast, gudgeon is separated with inclusion.

2. process according to claim 1 is characterized in that:

Utilize oxy-acetylene flame to heat at three positions of gudgeon end face among the said step c, these three positions keep at a certain distance away and shape triangular in shape.

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