CN216644570U - Be applied to novel masonry structure of high temperature manhole shutoff - Google Patents

Abstract

The utility model provides a novel masonry structure applied to high-temperature manhole plugging, which can be plugged in a vault manhole of a hot blast stove, and comprises a combined body structure matched with the shape and the size of the vault manhole, the combined body structure has the same material resistance index as a working layer in the vault manhole, a boss and a clamping groove structure which are matched with each other are arranged between the tail end of the combined body structure and the vault manhole, when the front end of the combined body structure is completely inserted into the vault manhole, the tail end of the combined body structure is locked in the clamping groove structure through the boss structure, and the boss and the clamping groove structure are movably connected, so that the combined body structure is convenient to replace, dismantle and can be repeatedly used, material and energy waste are avoided, and the combined body structure in the utility model adopts a plurality of plug brick blocks for combined building, and is prefabricated in advance through high-temperature slurry, and is simple and convenient to design, Safe and practical, the efficiency of construction is high to this structure is still convenient for build by laying bricks or stones insulating brick structure in the outside.

Description

Be applied to novel masonry structure of high temperature manhole shutoff

Technical Field

The utility model relates to the technical field of vault structures of hot blast stoves, in particular to a novel masonry structure applied to high-temperature manhole plugging.

Background

When designing hot-blast furnace vault manhole masonry structure, the shutoff of manhole adopts the fritter brick to build by laying bricks or stones, and nevertheless the hot-blast furnace internal temperature after toasting is high, builds by laying bricks or stones danger coefficient height under the high temperature, easily causes incident and construction quality to be difficult to obtain the assurance, and hot-blast furnace puts into production and appears the stove outer covering temperature height around the vault manhole soon, influences stove outer covering structural strength and brings great potential safety hazard for hot-blast furnace safety in production operation.

The main reasons are as follows: (1) after the hot blast stove is baked, the temperature in the stove reaches over 1200 ℃, the temperature at the manhole of the vault is about 1000 ℃, constructors still can not work for a long time under the condition of wearing fireproof clothes and fireproof masks, and the construction quality is poor due to poor operation environment.

(2) The cross section of the arch-top manhole is a round shape with the diameter of 600mm, the cross section of the blocking brick is a rectangle with the diameter of 114mm 65mm, a large gap is easily generated between the periphery of the arch-top manhole and the blocking brick during masonry construction, air is easily blown by the hot blast stove under long-term working conditions, and the temperature of a shell around the arch-top manhole is increased.

(3) The plugging bricks are all designed by refractory bricks with high heat conductivity coefficient, and the furnace shell around the built vault manhole has high temperature, so that the plugging bricks are a great potential safety hazard to the external environment.

(4) When the arch crown manhole needs to be dismantled, the manhole needs to be dismantled destructively, and part of refractory bricks fall into the furnace to cause hole blockage of the heat accumulator checker bricks in the furnace.

In conclusion, when the manhole of the vault of the hot blast stove is plugged, the construction operation difficulty is high, the danger is high, the temperature of the furnace shell around the manhole of the vault is high after the hot blast stove is put into production, and accidents such as air channeling, burning and the like occur at the manhole position of the vault. The temporary measures are to adopt a grouting method for remediation when the wind is stopped, but the problems that the hole is blocked by a heat accumulator in the furnace and the like caused by the inflow of slurry into the furnace can also occur.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a new masonry structure for high temperature manhole plugging, so as to solve the technical problems mentioned in the background art.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a be applied to novel masonry structure of high temperature manhole shutoff, but this novel masonry structure shutoff is in the vault manhole of hot-blast furnace, this novel masonry structure include with the shape and the size assorted assembly structure of vault manhole, and the assembly structure is the same with the resistant material index of the downthehole working layer of vault manhole, and be provided with boss and the draw-in groove structure of mutually supporting between the tail end of assembly structure and the vault manhole, after the vault manhole is inserted completely to the front end of assembly structure, the tail end of assembly structure passes through boss structure locking in the draw-in groove structure.

Further, a ceramic fiber blanket with a buffering function is padded between the combination body structure and the arch top manhole at the position of the clamping groove structure.

Furthermore, the outer side of the combined body structure is provided with at least one layer of insulating brick structure.

Further, a fiber material layer is paved on the outer sides of the heat-insulating brick structure and the arch top manhole together.

Further, the diameter of the combination structure is slightly smaller than the diameter of the vault manhole.

Furthermore, the clamping groove structure is in a ladder platform shape.

Furthermore, the combined body structure is built by combining a plurality of plug bricks, and is prefabricated in advance through high-temperature slurry.

Furthermore, a hoisting hole is formed in the assembly structure.

Furthermore, under the same working condition, the linear expansion coefficient and the expansion amount of the combined body structure and the refractory material of the working layer in the manhole of the vault are kept consistent at high temperature.

Compared with the prior art, the utility model has the beneficial effects that:

1. the combined body structure is built by combining a plurality of plug bricks, and is prefabricated in advance through high-temperature slurry, so that the combined body structure is simple and convenient in design, safe and practical, high in construction efficiency and convenient for building a heat-insulating brick structure outside;

2. the plugged manhole has good sealing performance, is not easy to blow air, is convenient to maintain and remove, and prolongs the service life of the hot blast stove;

3. the heat-insulating layer of the plugged manhole is completely built, the heat-insulating effect is good, the heat loss at the position of the manhole is reduced, and the heat efficiency of the hot blast stove is improved;

4. be provided with boss and the draw-in groove structure of mutually supporting between the tail end of assembly structure and the vault manhole, after the vault manhole is inserted completely to the front end of assembly structure, the tail end of assembly structure passes through boss structure locking in the draw-in groove structure, is swing joint between the two to make the assembly structure be convenient for change, demolish, repeatedly usable avoids material and energy extravagant.

Drawings

FIG. 1 is a schematic view of the installation of the new masonry structure and the vault manhole applied to high temperature manhole plugging according to the present invention;

FIG. 2 is a cross-sectional view of the composite structure;

FIG. 3 is a schematic size diagram of a composite structure provided in the examples;

the labels in the figure are: 1. vault manhole, 2, assembly structure, 3, draw-in groove structure, 4, boss structure, 5, ceramic fiber blanket, 6, insulating brick structure, 7, fiber material layer, 8, hole for hoist.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

The principle of the utility model is as follows: designing a combined body structure 2 for plugging a vault manhole, wherein the shape and the size of the combined body structure are matched with those of the vault manhole 1; a boss and a clamping groove structure which are matched with each other are designed between the combination body structure 2 and the arch top manhole 1; the material of the assembly structure 2 is the same as the refractory index of a working layer in a manhole at the vault of the hot blast stove; the outer side of the combined body structure is provided with a heat-insulating brick to reduce the temperature heat conduction in the furnace, a fiber material layer with a certain thickness is laid on the outer side of the heat-insulating brick to reduce the temperature heat conduction in the furnace and absorb the expansion of the material, and the expansion amount is determined by calculating the heat conduction.

The technical scheme of the utility model is explained in detail in the following with the accompanying drawings:

a novel masonry structure applied to high-temperature manhole plugging is mainly composed of a combined body structure 2, a heat-insulating brick structure 6, a ceramic fiber blanket 5 and the like as shown in figure 1.

The shape and the size of the combined body structure 2 are matched with those of the arch top manhole 1, the diameter of the combined body structure 2 is slightly smaller than that of the arch top manhole 1 so as to be convenient to build, the indexes of refractory materials of the combined body structure 2 and a working layer in the arch top manhole 1 are the same, and under the same working condition, the linear expansion coefficient and the expansion amount of the refractory materials are kept consistent at high temperature; and be provided with boss structure 4 and the draw-in groove structure 3 of mutually supporting between the tail end of combination structure 2 and vault manhole 1, after the front end of combination structure 2 inserted vault manhole 1 completely, the tail end of combination structure passes through boss structure 4 and locks in draw-in groove structure 3. The design of boss and draw-in groove structure is used for preventing that assembly structure 2 from slipping into the stove, carries out spacing locking to assembly structure 2.

The outside design of assembly structure 2 has at least one deck insulating brick structure 6, is provided with 2 layers in this embodiment to reduce the interior heat conduction volume of stove, reduce the temperature in the assembly structure outside, the increasing the thermal efficiency. Then, a fiber material layer 7 with a certain thickness is paved on the outer sides of the insulating brick structure 2 and the arch top manhole 1 together, so that on one hand, the heat conduction temperature in the furnace is continuously reduced, and on the other hand, the expansion of the refractory material after being heated is absorbed.

In this embodiment, the assembly structure 2 is built by combining 4 specially designed heavy bricks (plug bricks), a hoisting hole 8 is designed inside the assembly structure, specifically, as shown in fig. 2, the 4 prefabricated plug bricks are prefabricated in advance by high-temperature slurry, the thickness of the assembly structure 2 can be different according to different inner walls of the furnace, the assembly structure is generally designed to be 400-500 mm, the weight of the assembly structure is 260-330 kg, the weight of each prefabricated plug brick is 60-80 kg, and the size of the assembly structure provided in this embodiment is shown in fig. 3.

After 2 prefabricated completions of assembly structure, through inside hole for hoist 8 and hoist to application hoisting machinery hoists the back that targets in place, constructor impels assembly structure 2 vault manhole 1, and boss structure 4 that 2 tail ends of assembly structure set up locks spacingly with the draw-in groove structure 3 that the vault manhole outside set up, pushes away spacing department and can accomplish assembly structure 2's installation, and inside heat source cuts off through assembly structure 2, and outside insulating brick structure 6 can be normally under construction by laying bricks or stones.

Further, the boss structure 4 at the tail end of the combined body structure 2 is tightly laid with the clamping groove structure 3 on the outer side of the arch top manhole 1, the ceramic fiber blanket 5 is arranged at the joint, the ceramic fiber blanket 5 is used for buffering the thrust between the combined body structure 2 and the arch top manhole 1, and the combined body structure 2 is prevented from colliding on the inner-layer combined brick of the manhole. After the tail end of the assembly structure 2 is installed in place, the insulating brick structure 6 on the outer side is normally built by adopting a standard brick type, and as a heat source is isolated and disconnected, a constructor does not need to worry about high-temperature thermal risks, so that the building quality of the insulating brick structure is more accurate, the brick blocking structure of the whole vault manhole is more perfect, and the high-temperature risk and the risk of poor construction quality of the traditional building are avoided.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a be applied to novel masonry structure of high temperature manhole shutoff, but this novel masonry structure shutoff is at the vault manhole of hot-blast furnace, its characterized in that: this novel masonry structure includes the shape and the size assorted combination structure with the vault manhole, and the combination structure is the same with the resistant material index of the downthehole working layer of vault manhole to be provided with boss and the draw-in groove structure of mutually supporting between the tail end of combination structure and the vault manhole, after the vault manhole is inserted completely to the front end of combination structure, the tail end of combination structure passes through boss structure locking in the draw-in groove structure.

2. The novel masonry structure applied to high-temperature manhole plugging according to claim 1, wherein: and a ceramic fiber blanket with a buffering function is padded between the combination body structure and the arch top manhole at the clamping groove structure.

3. The novel masonry structure applied to high-temperature manhole plugging according to claim 1, wherein: and at least one layer of insulating brick structure is arranged on the outer side of the combined body structure.

4. The novel masonry structure applied to high-temperature manhole plugging according to claim 3, wherein: and a fiber material layer is paved on the outer sides of the heat-insulating brick structure and the arch top manhole together.

5. The novel masonry structure applied to high-temperature manhole plugging according to any one of claims 1 to 4, wherein: the diameter of the combination structure is slightly smaller than the diameter of the vault manhole.

6. The novel masonry structure applied to high-temperature manhole plugging according to claim 5, wherein: the clamping groove structure is in a ladder platform shape.

7. The novel masonry structure applied to high-temperature manhole plugging according to claim 5, wherein: the combined body structure is built by combining a plurality of plug bricks and is prefabricated in advance through high-temperature mud.

8. The novel masonry structure applied to high-temperature manhole plugging according to claim 7, wherein: and a hoisting hole is formed in the combined body structure.

9. The novel masonry structure applied to high-temperature manhole plugging according to claim 7, wherein: under the same working condition, the linear expansion coefficient and the expansion amount of the combined body structure and the refractory material of the working layer in the manhole of the vault are kept consistent at high temperature.

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