Reducing arch type refractory brick

Abstract

The utility model discloses a reducing arch type refractory brick which comprises a plurality of refractory brick units, every two adjacent refractory brick units are connected with each other, and aerogel is filled between the connected refractory brick units. Each refractory brick unit comprises a first supporting plate and a second supporting plate which are hinged with each other, an outer end plate is mounted between the outer ends of the first supporting plate and the second supporting plate, and an inner end plate is mounted between the inner ends of the first supporting plate and the second supporting plate; a cavity defined by the first supporting plate, the second supporting plate, the outer end plate and the inner end plate is also filled with aerogel. The first supporting plate, the second supporting plate, the outer end plate and the inner end plate are mullite refractory brick plates. And the end edges of the first supporting plates and the second supporting plates corresponding to the two adjacent refractory brick units are joggled. The first supporting plate and the second supporting plate of the same refractory brick unit are hinged to each other through a supporting plate connecting pin. The variable-diameter arch-type refractory brick not only has higher heat insulation and fire resistance, but also can meet the building requirements of pipe walls with different pipe diameters.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of firebricks, especially a kind of fireproof heat-insulating brick with high heat-insulating and high fire resistance for constructing high-temperature waste heat gas transmission pipe. BACKGROUND

[0002] As a kind of material with excellent heat insulation and fire resistance, heat-insulating refractory material shows extensive application value in many fields. Especially in the fields of metallurgy, ceramics, electricity and coking, heat-insulating refractory material can not only effectively reduce heat transfer and energy consumption, but also effectively resist high temperature and withstand high temperature without softening or melting.

[0003] Aerogel is a kind of high heat-insulating material with nano-porous structure. Due to its low density and porous structure, it can effectively prevent heat conduction and dissipation, and has excellent heat insulation effect. However, due to its extremely low thermal conductivity and extremely high porosity, aerogel bricks also exhibit brittleness and low strength, which limits the application range of aerogel. Aerogel is more difficult to be applied to gas transmission pipelines in high-temperature waste heat utilization systems, such as clean heat recovery coke oven waste heat utilization systems. The heat recovery coke oven system includes various pipe diameters of branch pipes, main pipes and total pipes. The bricks for building these pipelines not only require excellent heat insulation performance to improve the utilization rate of waste heat, but also can withstand extremely high temperatures, have fire resistance, corrosion resistance and heat shock resistance. In addition, due to the different pipe diameters of high-temperature pipelines, different brick types of pipe wall bricks must be used for building, which cannot be mass-produced, increasing the construction cost of gas transmission pipelines. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a variable-diameter arched firebrick which not only has high heat-insulating and fire-resistant performance, but also can meet the building requirements of different pipe diameters.

[0005] To solve the above-mentioned technical problem, the variable-diameter arched firebrick of the utility model comprises a plurality of firebrick units, and adjacent two firebrick units are connected to each other and filled with aerogel between the connected firebrick units. The firebrick unit comprises a first support plate and a second support plate which are hingedly connected, an outer end plate is installed between the outer ends of the first support plate and the second support plate, and an inner end plate is installed between the inner ends of the first support plate and the second support plate. The first support plate, the second support plate, the outer end plate and the inner end plate are also filled with aerogel in the cavity formed thereby. The first support plate, the second support plate, the outer end plate and the inner end plate are mullite firebrick plates.

[0006] In the above structure, since the firebrick adopts a multi-unit structure, and the firebrick unit is built by the first and second support plates hingedly connected with each other, and the inner and outer end plates, on the one hand, the two support plates form a fork-shaped support framework, and the inner and outer end plates are respectively inserted at the two ends of the support plate, thereby forming a stable support structure, which has high rigidity and bearing strength, and high ability to resist and bear external forces. The support plate and the end plate adopt mullite firebricks, which not only can withstand large mechanical pressure, but also can maintain the stability of the structure in an extremely high temperature environment. The mullite firebricks can also effectively block the erosion of harmful corrosive gases on the body, and have the characteristics of high refractoriness, low thermal conductivity and high thermal shock stability. Since the firebrick unit is filled with aerogel, the chamber surrounded by the first support plate, the second support plate, the outer end plate and the inner end plate is also filled with aerogel. The aerogel has the characteristics of nano-porous structure and very low thermal conductivity, so that the firebrick has excellent heat insulation performance and can provide long-lasting fireproof protection. Moreover, the use of aerogel also greatly reduces the weight of the firebrick. Since the first support plate and the second support plate are hingedly connected, the length of the inner end plate and the outer end plate can be changed to change the brick type of the firebrick unit, thereby forming a pipe wall with different radii of curvature to meet the masonry requirements of high-temperature waste heat gas pipelines with different diameters. Therefore, the use of the utility model not only greatly enhances the heat insulation performance of the firebrick, the excellent refractoriness and the high thermal shock resistance, but also can be used to masonry pipe walls with different diameters.

[0007] In a further embodiment of the utility model, the end edges of the first support plate and the second support plate corresponding to two adjacent firebrick units are tenon-jointed. The first support plate inner end tenon and the first support plate outer end tenon at the two ends of the first support plate of the firebrick unit are tenon-jointed with the second support plate inner end mortise and the second support plate outer end mortise at the two ends of the second support plate. Different curvature pipe wall structures can be formed to adapt to different pipe diameters and different arch structures.

[0008] In a further embodiment of the utility model, the first support plate and the second support plate of the same firebrick unit are hingedly connected through a support plate connecting pin. The first support plate outer end mortise and the second support plate outer end mortise opposite to each other are inserted with an outer end plate. The first support plate inner end mortise and the second support plate inner end mortise opposite to each other are inserted with an inner end plate. Different curvature pipe arch walls can be conveniently formed.

[0009] In a further embodiment of the utility model, the plate width of the outer end plate is greater than the plate width of the inner end plate, and the first support plate and the second support plate are bent plates. Different firebrick brick types can be conveniently built.

[0010] The further embodiment of the utility model discloses, silica aerogel is to the aerogel, first bracing board, second bracing board, outer end board and inner end board are the erosion -resistant mullite firebrick board, and bracing board connecting pin is the fire -resistant steel pin. It has excellent fire resistance and thermal insulation. BRIEF DESCRIPTION OF DRAWINGS

[0011] The variable-diameter arch type firebrick will be further explained in detail below in combination with the drawings and specific embodiments.

[0012] Figure 1 It is the structure schematic diagram of a specific embodiment of the variable-diameter arch type firebrick of the utility model,

[0013] Figure 2 It is Figure 1 The cross-sectional structure schematic diagram of the firebrick unit,

[0014] Figure 3 It is Figure 2 The end face structure diagram of the second bracing board,

[0015] Figure 4 It is Figure 3 The A direction view of,

[0016] Figure 5 It is Figure 2 The end face structure diagram of the first bracing board,

[0017] Figure 6 It is Figure 5 The B direction view of.

[0018] In the drawing, 1 - first bracing board, 11 - first bracing board hinged connection seat, 12 - first bracing board pin hole, 13 - first bracing board inner end insertion slot, 14 - first bracing board inner end tenon, 15 - first bracing board outer end tenon, 16 - first bracing board outer end insertion slot, 2 - aerogel, 3 - inner end board, 4 - second bracing board, 41 - second bracing board hinged connection seat, 42 - second bracing board pin hole, 43 - second bracing board inner end insertion slot, 44 - second bracing board inner end tenon slot, 45 - second bracing board outer end tenon slot, 46 - second bracing board outer end insertion slot, 5 - outer end board, 6 - bracing board connecting pin. SPECIFIC EMBODIMENT

[0019] As Figure 1The illustrated variable-diameter arched refractory brick comprises a plurality of mutually abutting refractory brick units, and the plurality of refractory brick units are filled with aerogel 2. The plurality of mutually abutting refractory brick units form an arched brick arch structure, or a complete pipe wall structure. The refractory brick unit comprises two symmetrically arranged first support plates 1 and second support plates 4, which are outwardly bent bending plate structures. The first support plates 1 and the second support plates 4 are hingedly connected to each other at the bending point positions in the middle portions thereof by support plate connecting pins 6, so that the first support plates 1 and the second support plates 4 form an X-shaped fork-shaped structure. An outer end plate 5 is inserted at the outer ends of the first support plates 1 and the second support plates 4, and an inner end plate 3 is inserted at the inner ends of the first support plates 1 and the second support plates 4. The cavity space surrounded by the first support plates 1, the second support plates 4, and the outer end plate 5 is filled with aerogel 2, and the cavity space surrounded by the first support plates 1, the second support plates 4, and the inner end plate 3 is also filled with aerogel 2. The plate width of the outer end plate 5 is greater than the plate width of the inner end plate 3, so that the refractory brick forms an arched brick type with a certain curvature. By adjusting the width difference between the outer end plate 5 and the inner end plate 3, arched refractory bricks with different curvatures can be formed. The first support plates 1, the second support plates 4, the outer end plate 5, and the inner end plate 3 are made of erosion-resistant mullite refractory bricks, which have high compressive strength, as well as high thermal shock resistance, thermal shock resistance, and corrosion resistance. In addition to erosion-resistant mullite refractory bricks, the first support plates 1, the second support plates 4, the outer end plate 5, and the inner end plate 3 can also be other mullite refractory bricks. The support plate connecting pin 6 is a cylindrical pin made of refractory steel, and the aerogel 2 is silica aerogel.

[0020] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the second support plate 4 is provided with two second support plate hinge seats 41 at the middle portion of the back plate surface, and the second support plate hinge seats 41 are provided with second support plate pin holes 42 for inserting the support plate connecting pins 6. The second support plate 4 is provided with a second support plate outer end insertion slot 46 and a second support plate outer end tenon slot 45 on both sides of the outer end thereof, and is provided with a second support plate inner end insertion slot 43 and a second support plate inner end tenon slot 44 on both sides of the inner end thereof.

[0021] The first support plate 1 is provided with two first support plate hinge seats 11 at the middle portion of the back plate surface, and the first support plate hinge seats 11 are provided with first support plate pin holes 12 for inserting the support plate connecting pins 6. The first support plate 1 is provided with a first support plate outer end insertion slot 16 and a first support plate outer end tenon 15 on both sides of the outer end thereof, and is provided with a first support plate inner end insertion slot 13 and a first support plate inner end tenon 14 on both sides of the inner end thereof.

[0022] The first support plate hinge seat 11 is inserted between the two second support plate hinge seats 41, and the first support plate 1 and the second support plate 4 are inserted and hingedly connected to each other by the support plate connecting pin 6. The outer end plate 5 is a plate-shaped refractory brick plate, and the two ends of the outer end plate 5 are respectively inserted between the first support plate outer end insertion slot 16 and the second support plate outer end insertion slot 46. The inner end plate 3 is also a plate-shaped refractory brick plate, and the two ends of the inner end plate 3 are respectively inserted between the first support plate inner end insertion slot 13 and the second support plate inner end insertion slot 43. The first support plate outer end tenon 15 and the first support plate inner end tenon 14 at the upper and lower ends of the first support plate 1 are respectively inserted into the second support plate outer end mortise 45 and the second support plate inner end mortise 44 of the second support plate 4 of the adjacent refractory brick unit. The tenon and the mortise are matched in shape and can be tightly mortised. Aerogel is filled in the cavity space surrounded by the first support plate 1, the second support plate 4 and the outer end plate 5. Aerogel 2, which is silica aerogel, is also filled in the cavity space surrounded by the first support plate 1, the second support plate 4 and the inner end plate 3.

[0023] The above describes some preferred embodiments of the present application, and the present application is not limited thereto, and many changes and improvements can be made. It should be noted that the terms "first" or "second" in the present application are only for the convenience of description and are not specific limitations. Improvements and changes based on the basic principles of the present application fall within the scope of the present application.

Claims

1. A variable-radius arch refractory brick, characterized by: The application relates to a refractory brick unit, which comprises a plurality of refractory brick units, two adjacent refractory brick units are connected with each other, and aerogel (2) is filled between the connected refractory brick units; the refractory brick unit comprises a first supporting plate (1) and a second supporting plate (4) which are hingedly connected with each other, an outer end plate (5) is arranged between the outer ends of the first supporting plate (1) and the second supporting plate (4), and an inner end plate (3) is arranged between the inner ends of the first supporting plate (1) and the second supporting plate (4); the cavity surrounded by the first supporting plate (1), the second supporting plate (4), the outer end plate (5) and the inner end plate (3) is also filled with aerogel (2); the first supporting plate (1), the second supporting plate (4), the outer end plate (5) and the inner end plate (3) are mullite refractory brick plates.

2. The variable-radius arch refractory brick of claim 1, wherein: The end edges of the first supporting plate (1) and the second supporting plate (4) of two adjacent refractory brick units are tenon-jointed.

3. The variable-radius arch refractory brick of claim 2, wherein: The first supporting plate inner end tenon (14) and the first supporting plate outer end tenon (15) at the two ends of the first supporting plate (1) of the refractory brick unit are tenon-jointed with the second supporting plate inner end mortise (44) and the second supporting plate outer end mortise (45) at the two ends of the second supporting plate (4).

4. A variable-radius arch refractory brick according to claim 1, 2 or 3, characterized in that: The first supporting plate (1) and the second supporting plate (4) of the same refractory brick unit are hingedly connected with each other through a supporting plate connecting pin (6).

5. A variable-radius arch refractory brick according to claim 1, 2 or 3, characterized in that: The first supporting plate outer end insertion groove (16) and the second supporting plate outer end insertion groove (46) of the first supporting plate (1) and the second supporting plate (4) of the same refractory brick unit are inserted with the outer end plate (5); the first supporting plate inner end insertion groove (13) and the second supporting plate inner end insertion groove (43) of the first supporting plate (1) and the second supporting plate (4) of the same refractory brick unit are inserted with the inner end plate (3).

6. The variable-radius arch refractory brick of claim 1, wherein: The plate width of the outer end plate (5) is greater than that of the inner end plate (3), and the first supporting plate (1) and the second supporting plate (4) are bent plates.

7. The variable-radius arch refractory brick of claim 4, wherein: The aerogel (2) is silica aerogel, the first supporting plate (1), the second supporting plate (4), the outer end plate (5) and the inner end plate (3) are erosion-resistant mullite refractory brick plates, and the supporting plate connecting pin (6) is a refractory steel pin.

Images