CN219314973U

CN219314973U - Prefabricated member and prefabricated member assembly for hot repair of iron runner

Info

Publication number: CN219314973U
Application number: CN202223565176.0U
Authority: CN
Inventors: 邓乐锐; 赵金秋; 秦颖; 高培林; 刘贯重; 王丽丽
Original assignee: Beijing Allied Rongda Engineering Material Co ltd
Current assignee: Beijing Allied Rongda Engineering Material Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-07-07
Anticipated expiration: 2032-12-30

Abstract

The utility model belongs to the technical field of blast furnace ironmaking, and particularly relates to a prefabricated member and prefabricated member combination for hot repair of an iron runner, wherein the prefabricated member is of a hexahedral structure and comprises a first surface, a second surface, a third surface and a fourth surface, wherein the first surface is opposite to the second surface, the third surface is opposite to the fourth surface, a plurality of clamping grooves are formed in the first surface, a plurality of protruding parts are arranged on the second surface, and the clamping grooves and the protruding parts are mutually in plug-in fit; the third surface is provided with a plurality of grooves, the fourth surface is provided with a plurality of protrusions, and the grooves and the protrusions are mutually spliced and matched; the preform assembly comprises a plurality of the above-described preforms. The prefabricated member has the advantages of small size, convenience in assembly, flexibility in installation, strong applicability, high strength, good quality, long service life and low cost, and the iron runner repaired by the prefabricated member assembly is convenient and fast to assemble.

Description

Prefabricated member and prefabricated member assembly for hot repair of iron runner

Technical Field

The utility model belongs to the technical field of blast furnace ironmaking, and particularly relates to a prefabricated part for hot repair of an iron runner.

The utility model also relates to a prefabricated member assembly applying the prefabricated member for hot repair of the iron runner.

Background

The main iron runner of the blast furnace is a channel type container for receiving blast furnace molten iron and slag, and is an important structural component for realizing slag-iron separation. The main iron runner is continuously flushed and eroded by slag iron liquid flowing out of the blast furnace, so that the lining of the main runner is damaged, and the main iron runner is maintained regularly. The current repairing method for the main iron runner mainly comprises the following steps: and (3) carrying out on-site formwork pouring and repairing the main iron runner by adopting a mode of sectionally combining the whole prefabricated member.

However, the on-site formwork pouring is extremely severe in operation environment, fine operation is difficult to achieve in vibration pouring operation under high-temperature environment, so that construction quality is difficult to guarantee, the strength of the poured material is greatly reduced, the service life of the main iron runner after pouring and repairing is influenced, the on-site pouring construction speed is low, and time consumption is long. The existing integral prefabricated members are of a U-shaped groove strip-shaped structure, the size of the existing integral prefabricated members is generally larger, the installation is not flexible enough, the residual lining of an iron runner which needs to be cleaned in the cleaning process is increased, on one hand, the workload of cleaning work is increased, on the other hand, unnecessary waste of residual materials is also caused, the existing prefabricated members are not perfect enough in processing of splicing joints, and the risk of iron leakage of a main iron runner is easily increased.

Disclosure of Invention

In order to solve the problems of the existing casting of a main iron runner and the existing integral prefabricated member and ensure the strength of the main iron runner after repair, the utility model provides a prefabricated member for hot repair of the iron runner, which is of a hexahedral structure and comprises a first surface, a second surface, a third surface and a fourth surface, wherein the first surface is opposite to the second surface, the third surface is opposite to the fourth surface, a plurality of clamping grooves are formed in the first surface, a plurality of protruding parts are arranged on the second surface, and the clamping grooves and the protruding parts are mutually spliced and matched; the third surface is provided with a plurality of grooves, the fourth surface is provided with a plurality of protrusions, and the grooves and the protrusions are mutually spliced and matched.

According to the prefabricated part for hot repair of the iron runner, which is provided by the utility model, the prefabricated part is of an inclined cuboid structure.

According to the prefabricated part for hot repair of the iron runner, the clamping grooves are respectively formed in pairs in parallel at intervals, the protruding portions are respectively formed in pairs in parallel at intervals, the grooves are respectively formed in pairs in parallel at intervals, and the protrusions are respectively formed in pairs in parallel at intervals.

According to the prefabricated member for hot repair of the iron runner, the clamping groove is a wedge-shaped groove, and the protruding part is a wedge-shaped protruding part.

According to the prefabricated part for hot repair of the iron runner, the grooves are semi-cylindrical grooves, and the protrusions are semi-cylindrical protrusions.

According to the prefabricated part for hot repair of the iron runner, which is provided by the utility model, the prefabricated part is respectively provided with a first prefabricated part, a second prefabricated part and a third prefabricated part along the height direction.

According to the prefabricated part for hot repair of the iron runner, the thickness of the second prefabricated part is larger than that of the first prefabricated part and that of the third prefabricated part.

According to the prefabricated part for hot repair of the iron runner, the first prefabricated part, the second prefabricated part and the third prefabricated part are made of corundum and silicon carbide.

According to the prefabricated member for hot repair of the iron runner, provided by the utility model, the surface of the prefabricated member is provided with the oxidation preventing layer.

The utility model also provides a prefabricated member assembly applying the prefabricated member for hot repair of the iron runner, which comprises the following components: the prefabricated parts for hot repair of the iron runner are mutually spliced in the first direction through grooves and protrusions; in the second direction, the clamping grooves of the prefabricated members are respectively inserted into the convex parts of the adjacent different prefabricated members, and are used for shielding insertion gaps formed between the adjacent two prefabricated members in the first direction.

The utility model has the beneficial effects that:

the utility model provides a prefabricated member for hot repair of an iron runner, which has the advantages of simple structure and small volume, solves the problems faced by on-site formwork pouring and the existing integral prefabricated member, ensures that the repaired main iron runner has high strength and good quality, and prolongs the service life of the main iron runner.

This prefab for iron runner hot repair adopts hexahedron structure to set up draw-in groove and bulge that can peg graft the complex each other on two relative faces respectively, set up recess and the arch that can peg graft the complex each other on two relative faces of another, adopt this kind of mode of concatenation, make the installation of prefab more convenient nimble, the restriction on the unsmooth surface of main iron runner that does not damage has improved the suitability of prefab.

The prefabricated member assembly formed by plugging the prefabricated members is compact in structure and tight in connection, multiple layers of prefabricated members can be paved on severe damage positions in the iron drop point area along the thickness direction of the prefabricated members, plugging gaps of the prefabricated members of each layer are staggered, and plugging gaps formed between two adjacent prefabricated members of the inner layer are shielded by the prefabricated members of the outer layer, so that the problem of weak structure at the joint is solved, and the risk of iron leakage of a main iron runner is reduced.

The prefabricated member and prefabricated member combination for hot repair of the iron runner improves the quality of the repaired main iron runner, enhances the strength of the repaired main iron runner, prolongs the service life of the repaired main iron runner, and has the advantages of small size, convenient assembly, flexible installation, strong applicability, high repair speed and shortened repair time.

Drawings

In order to more clearly illustrate the utility model or the technical solutions in the related art, the drawings used in the description of the embodiments or the related art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a structural elevation view of a preform for hot repair of an iron runner according to the present utility model;

FIG. 2 is a side view of the structure of the preform for hot repair of iron runner according to the present utility model;

FIG. 3 is a top view of a preform for hot repair of an iron runner according to the present utility model;

FIG. 4 is a front view showing the structure of the second prefabricated part thickening in the prefabricated part for hot repairing an iron runner according to the present utility model;

FIG. 5 is a side view of a second preform portion of the preform for hot repair of an iron runner of the present utility model;

FIG. 6 is a top view of a second preform portion of the preform for hot repair of an iron runner of the present utility model;

FIG. 7 is a structural elevation view of the preform assembly according to the present utility model;

FIG. 8 is a side view of the structure of the preform assembly according to the present utility model;

fig. 9 is a top view of the structure of the preform assembly according to the present utility model.

Reference numerals: 1. a first face; 2. a second face; 3. a third face; 4. a fourth face; 5. a clamping groove; 6. a protruding portion; 7. a groove; 8. a protrusion; 9. a first prefabricated part; 10. a second prefabricated part; 11. and a third preformed portion.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The preform and preform assembly for hot repair of iron runner according to the present utility model will be described with reference to fig. 1 to 9.

Fig. 1 to 3 are three views of the present preform for hot repair of a runner, respectively: FIG. 1 is an elevation view of a preform; FIG. 2 is a side view of a preform; fig. 3 is a top view of the preform, such that the structure of the preform is shown more fully specific. It can be intuitively known from the figure that the prefabricated member has a hexahedral structure, a clamping groove 5 and a protruding part 6 are respectively arranged on two opposite surfaces of one group of hexahedron, a groove 7 and a protruding part 8 are respectively arranged on two opposite surfaces of the other group of hexahedron, the clamping groove 5 and the protruding part 6 can be mutually inserted and matched, and the groove 7 and the protruding part 8 can be mutually inserted and matched, so that the prefabricated member can be randomly assembled and combined along the length direction and the thickness direction of the prefabricated member, and the repair work of the main iron runner is assisted to be completed.

Fig. 4 to 6 are three views showing the thickening of the second prefabricated part 10 in the prefabricated part for hot repair of the iron runner, which belong to an optimized structure of the prefabricated part, and are respectively as follows: fig. 4 is an elevation view of the thickening of the second prefabricated part 10 in the prefabricated part, fig. 5 is a side view of the thickening of the second prefabricated part 10 in the prefabricated part, and fig. 6 is a top view of the thickening of the second prefabricated part 10 in the prefabricated part, so that the thickening structure of the second prefabricated part 10 in the prefabricated part is shown more comprehensively and specifically. It can be seen from the drawing that the thickness of the second prefabricated portion 10 is thicker than the thickness of the first prefabricated portion 9 and the thickness of the third prefabricated portion 11 in the prefabricated member, and the second prefabricated portion 10 is most severely corroded by slag and is the most easily worn part when the blast furnace molten iron and slag are discharged from the main iron runner, so that the repair times are reduced, the strength is ensured, and the thickness of the second prefabricated portion 10 is specially thickened in order to prolong the service life of the main iron runner.

Fig. 7-9 are three views of the present preform assembly, respectively: fig. 7 is an elevation view of the preform assembly, fig. 8 is a side view of the preform assembly, and fig. 9 is a top view of the preform assembly, such that the structure of the preform assembly is shown more fully in detail. From the figure, it can be intuitively known that the prefabricated member assembly realizes the assembly on the length through the grooves 7 and the protrusions 8, realizes the assembly on the thickness through the clamping grooves 5 and the protrusions 6, and the specific number of the assembly can be determined according to the main iron runner to be repaired. In this prefab assembly, when assembling in prefab thickness direction, the draw-in groove 5 of outer prefab is pegged graft respectively on the bulge 6 of two adjacent prefabs of inlayer, makes the concatenation gap that produces when outer prefab is assembled two adjacent prefabs of inlayer in length direction shelter from, avoids seam weak point connection weak point, leads to main iron runner to leak iron.

According to an embodiment of the first aspect provided by the present embodiment, referring to fig. 1 to 3, there is provided a prefabricated member for hot repair of an iron runner, the prefabricated member has a hexahedral structure, and the prefabricated member includes a first surface 1, a second surface 2, a third surface 3 and a fourth surface 4, where the first surface 1 is opposite to the second surface 2, the third surface 3 is opposite to the fourth surface 4, a plurality of clamping grooves 5 are formed on the first surface 1, a plurality of protruding portions 6 are formed on the second surface 2, and the clamping grooves 5 and the protruding portions 6 are mutually inserted and matched; a plurality of grooves 7 are formed in the third face 3, a plurality of protrusions 8 are arranged on the fourth face 4, and the grooves 7 and the protrusions 8 are mutually spliced and matched.

The iron runner is a channel through which high-temperature molten iron or slag flows in blast furnace iron making, and is easy to damage due to the fact that the temperature of molten iron is up to 1450 ℃ in the iron tapping process, the molten iron is washed out, the chemical corrosion of iron slag, the oxidization of air, thermal shock stress generated by temperature fluctuation and the like in the using process, and the iron runner needs to be regularly repaired so that the iron runner can work normally, and at present, the hot repair of the iron runner is usually carried out in two ways, namely Al ₂ O ₃ And (3) carrying out on-site formwork casting on the SiC-C ultra-low cement casting material, and repairing the iron runner by adopting a segmented combination of integral prefabricated parts.

For the mode of adopting the on-site formwork pouring, because the on-site thermal state pouring operation environment is extremely bad, the pouring operation is difficult to be operated finely, the quality of the iron runner after repairing is difficult to be ensured, the strength of the poured material is not high, the service life of the iron runner is seriously influenced, the pouring construction speed is low, the time consumption is long, and the overall benefit is low. In addition, a steel mold is generally adopted in the casting process, the casting material is required to be taken out of the mold after being coagulated soon after the casting is finished, the strength of the casting material is not high at the stage, the casting material is extremely easy to damage in the process of taking out of the mold, cracks are formed in a casting body, and the cracks can influence the service life of an iron runner and cause great potential safety hazards of iron runner leakage in subsequent use.

For the mode of repairing the iron runner by the integral prefabricated member sectional combination, the existing prefabricated member has larger volume, the surface of the damaged iron runner is rugged, the size is extremely irregular, the cleaning is very difficult, the outer contour of the prefabricated part is blocked by the protruding part of the inner surface of the iron runner and cannot be installed in place, so that the repair of the iron runner is affected, and the joint of the prefabricated part is a weak link of slag erosion, so that the risk of iron leakage of the iron runner is increased, and the service life of the iron runner is affected.

In order to solve the problems faced in the current iron runner repair, the embodiment designs a prefabricated member for the iron runner hot repair, which has small volume and flexible installation, can be installed in place on the uneven surface of the damaged iron runner, reduces the difficulty of iron runner repair, ensures the quality and strength of the repaired iron runner, and prolongs the service life of the repaired iron runner.

The inner surface of the main channel repaired by the prefabricated member is provided with the bulges and the depressions with uniform intervals, so that the structure is beneficial to reducing the flow velocity of liquid slag iron close to the wall surface, reducing the scouring of slag iron to the wall surface and prolonging the service life of the iron channel.

Specifically, this prefab is realized prefab thickness and length on assembling respectively through bayonet fitting's draw-in groove 5 and bulge 6 and bayonet fitting's recess 7 and protruding 8 each other, and its connected form is simple, and its overall connection structure is inseparable, can adapt to and repair the iron runner of different damage degree, through this prefab, can make the iron runner of damage resume initial state, guarantees normal work when blast furnace ironmaking. In order to facilitate the plug-in matching of the clamping groove 5 and the protruding part 6, the clamping groove 5 and the protruding part 6 are of a structure with a large upper part and a small lower part.

The bottom of the iron runner is not seriously damaged in the use process, so that the bottom of the iron runner is not required to be repaired, the prefabricated part is not limited by the thickness of the bottom of the runner, and the prefabricated part can be assembled on the side wall of the damaged iron runner, so that the repair of the side wall of the iron runner is realized.

According to the prefabricated member for hot repair of the iron runner provided by the embodiment, a structural form of the prefabricated member is provided, and the prefabricated member is of an inclined cuboid structure.

The prefabricated member is made into an inclined shape, so that the prefabricated member can be better assembled and attached to the side wall of the damaged iron runner, and the iron runner is convenient to repair. It should be noted that the shape of the preform is not limited to a single shape, and may be a regular hexahedral structure or an irregular hexahedral structure, so long as the repair operation of the iron runner can be conveniently performed.

According to the prefabricated member for hot repair of the iron runner provided by the embodiment, the clamping grooves 5 are respectively formed in pairs in parallel at intervals, the protruding portions 6 are respectively formed in pairs in parallel at intervals, the grooves 7 are respectively formed in pairs in parallel at intervals, and the protrusions 8 are respectively formed in pairs in parallel at intervals.

According to the prefabricated member for hot repair of the iron runner provided by the embodiment, a specific structure of the clamping groove 5 and the protruding part 6 is provided, the clamping groove 5 is a wedge-shaped groove, and the protruding part 6 is a wedge-shaped protruding part.

Through mutually supporting, the clamping groove 5 and the protruding part 6 which are completely anastomosed facilitate the grafting between prefabricated members, so that the prefabricated members are spliced according to the specific conditions of different damages of the iron runner, the repair of the iron runner is completed, and meanwhile, the problem that the straight-through seam is easy to drill slag iron is avoided. It should be noted that the structures of the clamping groove 5 and the protruding portion 6 do not constitute a single limitation, so long as the assembly is flexible, the connection between the prefabricated members is convenient, and the connection between the prefabricated members is ensured to be tight.

According to the prefabricated member for hot repair of the iron runner provided by the embodiment, a concrete structure of the groove 7 and the protrusion 8 is provided, wherein the groove 7 is a semi-cylindrical groove, and the protrusion 8 is a semi-cylindrical protrusion.

Through mutually supporting, completely anastomotic recess 7 and protruding 8 make things convenient for grafting between the prefab, make it assemble according to the concrete circumstances that the iron runner is different to damage, accomplish the repair to the iron runner, avoid the easy problem of drilling the sediment iron of straight seam simultaneously. It should be noted that the structures of the groove 7 and the protrusion 8 do not constitute a single limitation, so long as the assembly is flexible, the connection between the prefabricated members is convenient, and the connection between the prefabricated members is ensured to be tight.

According to the preform for hot repair of an iron runner provided in the present embodiment, the preforms are provided as the first preform portion 9, the second preform portion 10, and the third preform portion 11, respectively, in the height direction thereof.

When receiving molten iron and slag, the iron runner is respectively contacted with different substances at different heights, and the substances can damage the iron runner to different degrees, wherein the first prefabricated part 9 is mainly exposed out of liquid slag iron, the second prefabricated part 10 is mainly contacted with high-temperature slag and eroded by the high-temperature slag, and the third prefabricated part 11 is mainly contacted with the high-temperature molten iron. Therefore, the prefabricated parts are respectively arranged into the first prefabricated part 9, the second prefabricated part 10 and the third prefabricated part 11 along the height direction, and on the premise of ensuring the strength and the erosion resistance of the prefabricated parts, different materials and different thicknesses are respectively adopted for the first prefabricated part 9, the second prefabricated part 10 and the third prefabricated part 11. By adopting the structure, the performance of the prefabricated member is ensured, and the production cost is reduced.

According to the preform for hot repair of an iron runner provided in the present embodiment, referring to fig. 4 to 6, the thickness of the second preform portion 10 of the preform is greater than the thickness of the first preform portion 9 and the thickness of the third preform portion 11.

Since the second prefabricated portion 10 mainly contacts with the high-temperature slag and reacts with the high-temperature slag, the second prefabricated portion 10 is more easily corroded and damaged, and the thickness of the second prefabricated portion 10 is thickened, so that the service life of the second prefabricated portion is prolonged.

According to the prefabricated part for hot repairing the iron runner provided by the embodiment, the first prefabricated part 9, the second prefabricated part 10 and the third prefabricated part 11 are made of corundum and silicon carbide.

In the iron runner during operation, there is the difference in the material that first prefabricated portion 9, second prefabricated portion 10 and third prefabricated portion 11 contacted, in order to guarantee the intensity of first prefabricated portion 9, second prefabricated portion 10 and third prefabricated portion 11, reduction in production cost simultaneously, the corundum and the content of carborundum are different in first prefabricated portion 9, second prefabricated portion 10 and the third prefabricated portion 11, and the corundum and the content of carborundum are the lowest in first prefabricated portion 9, and the corundum and the content of carborundum are the highest in second prefabricated portion 10, and the corundum content is higher in third prefabricated portion 11, but the carborundum content is lower.

In addition, at the position of the iron runner near the tapping hole, the fluctuation of the liquid level of the molten iron is large, the scouring is serious, and the impact force is strong, so the proportion of corundum, silicon carbide and other raw materials in the material can be properly improved, the high temperature resistance, the scouring resistance and the slag erosion resistance of the prefabricated member are improved, and in the same way, at the position of the iron runner near the slag skimmer, the fluctuation of the liquid level of the molten iron is small, the scouring is slight, and the impact force is low, so the corundum, the silicon carbide and other raw materials in the material can be properly reduced or even not added. By carrying out different designs on the prefabricated member according to the actual working condition of the iron runner, the cost can be greatly reduced on the premise of ensuring the strength.

According to the prefabricated member for hot repair of the iron runner, provided by the embodiment, the surface of the prefabricated member is provided with an oxidation prevention layer.

Through setting up the oxidation prevention layer, can furthest prevent that materials such as C (carbon) on prefabrication surface, siC (carborundum) from being oxidized, and then can effectively reduce the speed that main iron runner after adopting this prefabrication to repair is eroded, prolongs the life of main iron runner after repairing.

This prefab is small, installs convenient nimble, can freely assemble according to the iron runner condition of damaging, accomplishes the repair work of iron runner, and according to the actual behavior of iron runner, sets up the prefab into first prefab portion 9, second prefab portion 10 and third prefab portion 11, through changing the material ratio and the thickness in the different positions of prefab, has both guaranteed the intensity of prefab, has prolonged the life of repairing the back iron runner, has reduced manufacturing cost again, has higher economic benefits.

According to an embodiment of the second aspect provided in the present embodiment, referring to fig. 7 to 9, there is provided a preform assembly using the above-mentioned preform for hot repair of an iron runner, comprising: the prefabricated parts for hot repair of the iron runner are mutually spliced in the first direction through the grooves 7 and the protrusions 8; in the second direction, the clamping grooves 5 of the prefabricated members are respectively inserted into the convex parts 6 of the adjacent different prefabricated members, and are used for shielding insertion gaps formed between the adjacent two prefabricated members in the first direction.

In order to eliminate the potential safety hazard that the prefab is weak and lead to easily generating pig iron runner and leaking in joint, when this prefab assembly is assembled in prefab thickness direction, the draw-in groove 5 of outer prefab is pegged graft respectively on the bulge 6 of two adjacent prefabs of inlayer, makes the concatenation gap that produces when the adjacent two prefabs of inlayer are assembled in length direction shelter from to outer prefab, avoids joint weak part connection insecure, leads to main iron runner and leaks.

The prefabricated member assembly is compact in structure and good in integrity, the damaged surface of the main iron runner can be effectively repaired, the iron runner repaired by the prefabricated member assembly is high in strength and good in quality, the surface of the iron runner repaired by the prefabricated member assembly is in an uneven shape and is not smooth in plane, the kinetic energy of molten iron and slag can be rapidly dissipated, the flow rate of slag iron on the near wall surface is reduced, the scouring of slag iron on the surface of the side wall of the iron runner is reduced, the damage to the side wall of the iron runner is reduced, and the service life of the iron runner is prolonged.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The prefabricated member for hot repair of the iron runner is characterized by comprising a hexahedral structure, and comprises a first surface (1), a second surface (2), a third surface (3) and a fourth surface (4), wherein the first surface (1) is opposite to the second surface (2), the third surface (3) is opposite to the fourth surface (4), a plurality of clamping grooves (5) are formed in the first surface (1), a plurality of protruding parts (6) are arranged on the second surface (2), and the clamping grooves (5) and the protruding parts (6) are mutually spliced and matched; a plurality of grooves (7) are formed in the third face (3), a plurality of protrusions (8) are arranged on the fourth face (4), and the grooves (7) and the protrusions (8) are in mutual insertion fit.

2. The preform for hot repair of iron runner of claim 1, wherein the preform is of a sloped cuboid structure.

3. The prefabricated member for hot repair of iron runner according to claim 1, wherein a plurality of clamping grooves (5) are respectively formed in pairs in parallel and at intervals, a plurality of protruding portions (6) are respectively formed in pairs in parallel and at intervals, a plurality of grooves (7) are respectively formed in pairs in parallel and at intervals, and a plurality of protrusions (8) are respectively formed in pairs in parallel and at intervals.

4. Preform for hot repair of iron runner according to claim 1, characterized in that the clamping groove (5) is a wedge-shaped groove and the protrusion (6) is a wedge-shaped protrusion.

5. Preform for hot repair of iron runner according to claim 1, characterized in that the recess (7) is a semi-cylindrical recess and the protrusion (8) is a semi-cylindrical protrusion.

6. Preform for hot repair of iron runner according to claim 1, characterized in that the preform is provided as a first preform part (9), a second preform part (10) and a third preform part (11) in its height direction, respectively.

7. Preform for hot repair of iron runner according to claim 6, characterized in that the thickness of the second preform portion (10) is greater than the thickness of the first preform portion (9) and the thickness of the third preform portion (11).

8. The preform for hot repair of iron runner according to any one of claims 1-7, characterized in that the surface of the preform is provided with an oxidation preventing layer.

9. A preform assembly, comprising: preform for hot repair of iron runner according to any of claims 1-8, adjacent two of said preforms being mutually inserted in a first direction by means of grooves (7) and protrusions (8); in the second direction, the clamping grooves (5) of the prefabricated members are respectively inserted into the convex parts (6) of the adjacent different prefabricated members, and are used for shielding insertion gaps formed between the adjacent two prefabricated members in the first direction.