High-heat-insulation arch-type refractory brick

Abstract

The high-heat-insulation arch-type refractory brick comprises a plurality of refractory brick units, each refractory brick unit comprises a first supporting plate and a second supporting plate which are hinged to each other, an outer end plate is installed between the outer ends of the first supporting plates and the second supporting plates, and an inner end plate is installed between the inner ends of the first supporting plates and the second supporting plates; a cavity defined by the first supporting plate, the second supporting plate, the outer end plate and the inner end plate is filled with aerogel. The end edges of the first supporting plates and the second supporting plates corresponding to every two adjacent refractory brick units are in joggle joint, and aerogel is filled between the connected refractory brick units. The plate width of the outer end plate is larger than that of the inner end plate, and the first supporting plate and the second supporting plate are bent plates. The first supporting plate, the second supporting plate, the outer end plate and the inner end plate are mullite refractory brick plates. The first supporting plate and the second supporting plate are hinged to each other through a supporting plate connecting pin. The high-heat-insulation 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 invention relates to a refractory brick, in particular to a refractory heat-insulating brick with high thermal insulation and high fire resistance for constructing a high-temperature waste heat gas transmission pipe. Background Art

[0002] As a material with excellent thermal insulation and fireproof properties, insulating refractory materials have shown wide application value in many fields. Especially in the fields of metallurgy, ceramics, electricity and coking, insulating refractory materials can not only effectively reduce heat transfer and energy consumption, but also effectively resist high temperature and can withstand high temperature without softening or melting.

[0003] Aerogel is a highly thermally insulating material with a nanoporous structure. Due to its low density and porous structure, it can effectively prevent the conduction and loss of heat and has excellent thermal insulation effects. However, due to the extremely low thermal conductivity and extremely high porosity of aerogel, aerogel bricks also show their brittleness and low strength. The brittleness and low strength limit the application range of aerogel. Aerogel is more difficult to apply to gas pipelines in high-temperature waste heat utilization systems, such as the waste heat utilization system of clean heat recovery coke ovens. The heat recovery coke oven system includes pipes such as branch pipes, main pipes and main pipes of various diameters. The masonry bricks of these pipes are not only required to have excellent thermal insulation properties to improve the utilization rate of waste heat, but also to be able to withstand extremely high temperatures, and have fire resistance, corrosion resistance and thermal shock resistance. In addition, due to the different diameters of high-temperature pipelines, different brick types of pipe wall bricks must be used for different pipe diameters during masonry, and batch production cannot be carried out, which increases the construction cost of the gas pipeline. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a high-insulation arch refractory brick, which not only has high insulation and refractory performance, but also can adapt to the masonry requirements of pipe walls with different diameters.

[0005] In order to solve the above technical problems, the high-insulation arch refractory brick of the present invention comprises a plurality of refractory brick units, wherein the refractory brick unit comprises a first support plate and a second support plate which are hinged to each other, 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; a chamber surrounded by the first support plate, the second support plate, the outer end plate and the inner end plate is filled with aerogel; the end edges of the first support plate and the second support plate corresponding to two adjacent refractory brick units are mortise and tenoned, and aerogel is filled between the connected refractory brick units; 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; the first support plate, the second support plate, the outer end plate and the inner end plate are mullite refractory brick plates.

[0006] In the above structure, since the refractory bricks adopt a multi-unit structure, and the refractory brick unit is constructed by the first support plate and the second support plate, as well as the inner end plate and the outer end plate, which are hinged to each other, on the one hand, the two support plates constitute a fork-shaped support skeleton, and the inner end plate and the outer end plate are respectively inserted at both ends of the support plate, thereby forming a stable support structure, which has high rigidity and bearing strength, and has a high ability to resist and bear external forces. The support plates and end plates are made of mullite refractory bricks, which can not only withstand large mechanical pressure, but also maintain the stability of the structure in an extremely high temperature environment. The mullite refractory bricks can also effectively block the erosion of harmful corrosive gases to the body, and have the characteristics of high refractoriness, low thermal conductivity and high thermal shock stability. Because aerogel is filled between the refractory brick units, 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 a nanoporous structure and a very low thermal conductivity, which makes the refractory bricks have excellent thermal insulation performance and can provide long-lasting fireproof protection. In addition, the use of aerogel also greatly reduces the mass of the refractory bricks. Also, because the first support plate and the second support plate are hinged, the brick type of the refractory brick unit can be changed by simply changing the relative length of the inner end plate and the outer end plate, and then forming a pipe wall with different curvature radii to meet the masonry requirements of high-temperature waste heat gas transmission pipelines of different diameters. Therefore, the use of the present invention not only greatly enhances the thermal insulation and heat insulation performance of refractory bricks, as well as excellent refractoriness and high thermal shock resistance, but also can build pipe walls of pipelines with different diameters.

[0007] In a further embodiment of the present invention, the first support plate inner end tenons and the first support plate outer end tenons at both ends of the first support plate of the refractory brick unit are mortised with the second support plate inner end tenon grooves and the second support plate outer end tenon grooves at both ends of the second support plate, so as to form pipe wall structures with different curvatures to adapt to different pipe diameters and different arch structures.

[0008] In a further embodiment of the present invention, the first support plate and the second support plate of the same refractory brick unit are hinged to each other through a support plate connecting pin. The first support plate outer end slot and the second support plate outer end slot opposite to the first support plate and the second support plate of the same refractory brick unit are plugged with an outer end plate; the first support plate inner end slot and the second support plate inner end slot opposite to the first support plate and the second support plate of the refractory brick unit are plugged with an inner end plate. Tube arch walls with different curvatures can be conveniently formed.

[0009] In a further embodiment of the present invention, the aerogel is silica aerogel, the first support plate, the second support plate, the outer end plate and the inner end plate are corrosion-resistant mullite refractory brick plates, and the support plate connecting pins are refractory steel pins, which have excellent refractoriness and thermal insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The highly thermally insulating arched refractory bricks of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 It is a structural schematic diagram of a specific implementation mode of the high thermal insulation arch refractory brick of the present invention;

[0012] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the refractory brick unit;

[0013] Figure 3 yes Figure 2 The end structure diagram of the second support plate;

[0014] Figure 4 yes Figure 3 A-direction view;

[0015] Figure 5 yes Figure 2 The end structure diagram of the first support plate;

[0016] Figure 6 yes Figure 5 B view.

[0017] In the figure, 1 is the first support plate, 11 is the first support plate hinge seat, 12 is the first support plate pin hole, 13 is the first support plate inner end slot, 14 is the first support plate inner end tenon, 15 is the first support plate outer end tenon, 16 is the first support plate outer end slot, 2 is the aerogel, 3 is the inner end plate, 4 is the second support plate, 41 is the second support plate hinge seat, 42 is the second support plate pin hole, 43 is the second support plate inner end slot, 44 is the second support plate inner end tenon, 45 is the second support plate outer end tenon, 46 is the second support plate outer end slot, 5 is the outer end plate, 6 is the support plate connecting pin. DETAILED DESCRIPTION

[0018] like Figure 1The high-insulation arch-type refractory brick shown in the figure comprises a plurality of refractory brick units abutting against each other, and aerogel 2 is filled between the plurality of refractory brick units abutting against each other, and the plurality of refractory brick units abutting against each other form an arc-shaped brick arch structure, or a complete tube wall structure. The refractory brick unit comprises two symmetrically arranged first support plates 1 and second support plates 4, and the first support plates 1 and second support plates 4 are bent plate structures bent outward, and the first support plates 1 and second support plates 4 are hinged to each other at the bending point located in the middle by support plate connecting pins 6, so that the first support plates 1 and second support plates 4 form an X-shaped fork structure. An outer end plate 5 is inserted at the outer end of the first support plate 1 and second support plate 4, and an inner end plate 3 is inserted at the inner end of the first support plate 1 and second support plate 4, and the chamber space surrounded by the first support plate 1, the second support plate 4 and the outer end plate 5 is filled with aerogel 2; similarly, the chamber space surrounded by the first support plate 1, the second support plate 4 and the inner end plate 3 is also filled with aerogel 2. The width of the outer end plate 5 is greater than the width of the inner end plate 3, so that the refractory bricks form an arched brick shape 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 plate 1, the second support plate 4, the outer end plate 5 and the inner end plate 3 are made of erosion-resistant mullite refractory bricks, which have high compressive and pressure-bearing capacity, as well as resistance to thermal shock, thermal shock and corrosion. In addition to erosion-resistant mullite refractory bricks, the first support plate 1, the second support plate 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 a silica aerogel.

[0019] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, two second support plate hinge seats 41 are provided at the middle of the back plate surface of the second support plate 4, and second support plate pin holes 42 for inserting support plate connecting pins 6 are provided on the second support plate hinge seats 41. Second support plate outer end slots 46 and second support plate outer end tenon grooves 45 are provided on both sides of the outer end of the second support plate 4, respectively; second support plate inner end slots 43 and second support plate inner end tenon grooves 44 are provided on both sides of the inner end of the second support plate 4, respectively.

[0020] Two first support plate hinge seats 11 are provided at the middle position of the back plate surface of the first support plate 1, and a first support plate pin hole 12 for inserting the support plate connecting pin 6 is provided on the first support plate hinge seat 11. A first support plate outer end slot 16 and a first support plate outer end tenon 15 are provided on both sides of the outer end of the first support plate 1; a first support plate inner end slot 13 and a first support plate inner end tenon 14 are provided on both sides of the inner end of the first support plate 1.

[0021] 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 mutually inserted and hinged through the support plate connecting pin 6. The outer end plate 5 is a refractory brick plate with a plate-like structure, and the two ends of the outer end plate 5 are respectively inserted between the first support plate outer end slot 16 and the second support plate outer end slot 46; the inner end plate 3 is also a refractory brick plate with a plate-like structure, and the two ends of the inner end plate 3 are respectively inserted between the first support plate inner end slot 13 and the second support plate inner end slot 43. The first support plate outer end convex tenon 15 and the first support plate inner end convex tenon 14 at the upper and lower ends of the first support plate 1 are respectively inserted into the second support plate outer end tenon groove 45 and the second support plate inner end tenon groove 44 of the second support plate 4 of another adjacent refractory brick unit. The shapes of the convex tenon and the tenon groove match each other and can be tightly mortised. The chamber space surrounded by the first support plate 1, the second support plate 4 and the outer end plate 5 is filled with aerogel. The chamber space surrounded by the first support plate 1, the second support plate 4 and the inner end plate 3 is also filled with aerogel 2, and the aerogel 2 is silica aerogel.

[0022] The above lists some preferred embodiments of the present invention, but the present invention is not limited thereto, and many changes or improvements can be made. It should also be noted that the expressions "first" or "second" in the present invention are only for the convenience of description and are not specific limitations. Improvements and changes based on the basic principles of the present invention all fall within the scope of protection of the present invention.

Claims

1. A high insulation arch refractory brick, characterized by: The invention comprises a plurality of refractory brick units, wherein the refractory brick units comprise a first support plate (1) and a second support plate (4) which are hinged to each other, an outer end plate (5) being installed between the outer ends of the first support plate (1) and the second support plate (4), and an inner end plate (3) being installed between the inner ends of the first support plate (1) and the second support plate (4); a chamber surrounded by the first support plate (1), the second support plate (4), the outer end plate (5) and the inner end plate (3) is filled with aerogel (2); the end edges of the first support plate (1) and the second support plate (4) corresponding to two adjacent refractory brick units are mortise-jointed, and aerogel (2) is filled between the connected refractory brick units; the plate width of the outer end plate (5) is greater than the plate width of the inner end plate (3), and the first support plate (1) and the second support plate (4) are bent plates; the first support plate (1), the second support plate (4), the outer end plate (5) and the inner end plate (3) are mullite refractory brick plates.

2. The high thermal insulation arch refractory brick according to claim 1, characterized in that: The first support plate inner end tenons (14) and the first support plate outer end tenons (15) at both ends of the first support plate (1) of the refractory brick unit are mortise-jointed with the second support plate inner end tenons (44) and the second support plate outer end tenons (45) at both ends of the second support plate (2).

3. The high thermal insulation arch refractory brick according to claim 1, characterized in that: The first support plate (1) and the second support plate (4) of the same refractory brick unit are hinged to each other via a support plate connecting pin (6).

4. The high thermal insulation arch refractory brick according to claim 1, characterized in that: An outer end plate (5) is inserted into the first support plate outer end slot (16) and the second support plate outer end slot (46) of the first support plate (1) and the second support plate (4) of the same refractory brick unit; an inner end plate (3) is inserted into the first support plate inner end slot (13) and the second support plate inner end slot (43) of the first support plate (1) and the second support plate (4) of the refractory brick unit.

5. The high thermal insulation arch refractory brick according to claim 1, characterized in that: The aerogel (2) is a silicon dioxide aerogel, the first support plate (1), the second support plate (4), the outer end plate (5) and the inner end plate (3) are corrosion-resistant mullite refractory brick plates, and the support plate connecting pins (6) are refractory steel pins.

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