Fire-resistant heat-insulation pouring structure for combustion chamber

Abstract

The utility model relates to the technical field of combustion chamber equipment, in particular to a fire-resistant heat-insulation pouring structure for a combustion chamber, which comprises supporting longitudinal steel bars, first transverse steel bars and second transverse steel bars, the supporting longitudinal steel bars are orderly welded and fixed on an outer protective plate, heat-insulation cotton is inserted into the supporting longitudinal steel bars and is compacted, and the first transverse steel bars and the second transverse steel bars are welded and fixed on the outer protective plate. The outer protective plate forms a pouring shell area, the first transverse steel bars and the second transverse steel bars are staggered in order longitudinally and transversely and fixed through steel bar binding wires to form a steel bar cage, a set of first transverse steel bars are erected at the position, a certain distance away from the steel bar cage, of the steel bar cage, and hexsteel is laid on the first transverse steel bars. The first transverse steel bars and the hexsteel are fixedly connected through the steel bar binding wires, and a pouring layer is formed through pouring. The utility model solves the problem that the temperature of the outer surface of the combustion chamber is higher due to the characteristics of heat absorption, heat storage and heat transfer of the pouring layer, prolongs the service life of the whole combustion chamber, improves the heat efficiency of the combustion chamber, and prevents the pouring layer from being easy to crack and fall off.

Description

Technical Field

[0001] The invention relates to the technical field of combustion chamber equipment, in particular to a refractory heat-insulating casting structure for a combustion chamber. Background Art

[0002] Existing refractory cast structures such as Figure 1 As shown, it is generally composed of supporting longitudinal steel bars 1, pouring layer 2, outer guard plate 3, steel bar ties 4, 1# transverse steel bars 5, 2# transverse steel bars 6, etc.

[0003] Its structure is a casting shell area composed of an outer guard plate 3. In order to achieve the solid strength of the casting layer 2 in the shell of the outer guard plate 3, the supporting longitudinal steel bars 1, 1# transverse steel bars 5, and 2# transverse steel bars 6 are used to be staggered in an orderly manner vertically and horizontally before pouring, and fixed with steel wire 4 to form a steel cage, and finally the casting layer 2 is cast with castable material; the combustible gas burns in the combustion chamber to generate high temperature, and the casting layer 2 has the characteristics of heat absorption, heat storage and heat transfer. After continuous combustion for a certain period of time, the temperature is transferred to the outer guard plate 3, resulting in a high surface temperature of the combustion chamber, which will cause the working environment temperature to be high and easy to scald the staff. The outer guard plate 3 is prone to thermal fatigue and shortened lifespan, the combustion heat loss is high, and long-term repeated thermal expansion and contraction causes the casting layer 2 to be prone to cracking and falling off.

[0004] The cast layer currently on the market has the characteristics of heat absorption, heat storage and heat transfer. Long-term continuous operation will cause the temperature of the outer protective plate on the surface of the combustion chamber to be high. The outer protective plate is prone to thermal fatigue, which shortens its life. In addition, the combustion heat loss is high. Long-term repeated thermal expansion and contraction can easily cause the cast layer to crack and fall off. Summary of the Invention

[0005] The purpose of the present invention is to provide a refractory and heat-insulating casting structure for a combustion chamber, so as to solve the problem that the temperature of the combustion chamber surface is high due to the heat absorption, heat storage and heat transfer characteristics of the casting layer, and to increase the service life of the entire combustion chamber, and improve the thermal efficiency of the combustion chamber, while avoiding the problem of easy cracking and falling off of the casting layer.

[0006] To achieve the above object, the present invention provides the following technical solution: a fire-resistant heat-insulating cast structure for a combustion chamber, comprising supporting longitudinal steel bars, first transverse steel bars and second transverse steel bars,

[0007] The supporting longitudinal steel bars are welded and fixed to the outer guard plate in an orderly manner, and thermal insulation cotton is inserted into the supporting longitudinal steel bars and compacted, and the outer guard plate forms a casting shell area;

[0008] The first transverse steel bars and the second transverse steel bars are staggered in an orderly manner vertically and horizontally and fixed with steel bar ties to form a steel cage;

[0009] A set of first transverse steel bars is set up at a certain distance from the steel cage, and a tortoise shell mesh is laid on the first transverse steel bars. The first transverse steel bars and the tortoise shell mesh are fixedly connected by steel bar ties, and then poured to form a casting layer.

[0010] Preferably, a tortoise shell mesh is laid on the thermal insulation cotton, so that the combustion chamber has thermal insulation and the thermal insulation cotton can be compacted more tightly.

[0011] Preferably, thermal insulation cotton is laid between the outer guard plate and the pouring layer. The thermal insulation cotton effectively keeps the surface temperature of the outer guard plate basically the same as the room temperature, thereby not affecting the working environment temperature and not causing the risk of scalding the staff. It can also increase the service life of the outer guard plate and at the same time improve the heat utilization rate of the combustion chamber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) Solve the problem that the temperature of the outer surface of the combustion chamber is high due to the heat absorption, heat storage and heat transfer characteristics of the casting layer;

[0014] (2) Improve the service life of the entire combustion chamber, improve the thermal efficiency of the combustion chamber, and avoid cracking and falling off of the casting layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the prior art structure;

[0016] Figure 2 It is a structural diagram of the present utility model.

[0017] In the figure: 1. Supporting longitudinal steel bars; 2. Casting layer; 3. Outer protective plate; 4. Steel bar wire; 5. First transverse steel bar; 6. Second transverse steel bar; 7. Thermal insulation cotton; 8. Tortoise shell mesh. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-2 , an embodiment provided by the present invention:

[0020] A fire-resistant heat-insulating cast structure for a combustion chamber, the structural principle of which is that the outer guard plate 3 forms a casting shell area. In order to achieve the firm strength of the casting layer 2 in the shell, the supporting longitudinal steel bars 1 are welded and fixed to the outer guard plate 3 in an orderly manner before pouring. In order to make the combustion chamber have the function of heat preservation and heat insulation, thermal insulation cotton 7 is inserted into the supporting longitudinal steel bars 1 and compacted. After compaction, a tortoise shell mesh 8 is laid on the thermal insulation cotton 7. When the thermal insulation cotton 7 is compacted, the second transverse steel bars 6 and the first transverse steel bars 5 are staggered in an orderly manner vertically and horizontally and fixed with steel wire 4 to form a steel cage; a set of first transverse steel bars 5 is set up at a certain distance from the steel cage, and a tortoise shell mesh 8 is laid on it, and it is fixed together with steel wire 4, and finally castable is cast. During the pouring process, a vibrating rod is used to ensure that the castable can evenly and fully fill all the skeleton structures. The castable is finally formed into a casting layer 2; the combustible gas burns in the combustion chamber to generate high temperature, and the casting layer 2 has the function of absorbing and storing heat. Due to the heat transfer characteristics, since thermal insulation cotton 7 is laid between the outer guard plate 3 and the casting layer 2, the thermal insulation cotton 7 effectively maintains heat and insulates so that the surface temperature of the outer guard plate 3 is basically the same as the room temperature, thereby not affecting the working environment temperature and not causing the risk of scalding the staff, and can also improve the service life of the outer guard plate 3, while also improving the heat utilization rate of the combustion chamber; the casting layer 2 repeatedly expands and contracts over a long period of time, which will cause the alternating effects of extrusion force and contraction force, and will also cause the strength of the casting layer to decay, and over time will cause the casting layer 2 to crack and fall off easily. To solve this problem, thermal insulation cotton 7 and tortoise shell net 8 are added. Although the thermal insulation cotton 7 is compacted during construction, it still has a certain flexibility. By utilizing the flexibility of the thermal insulation cotton 7, the tortoise shell net 8 uniformly and comprehensively applies the extrusion and contraction forces to the thermal insulation cotton 7, which can greatly offset the influence of this force. The tortoise shell net 8 can also make the casting layer 2 mutually bonded and firmly in each groove, so that the casting layer 2 is durable and the strength is not decayed.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A fire-resistant heat-insulating cast structure for a combustion chamber, comprising a supporting longitudinal steel bar (1), a first transverse steel bar (5) and a second transverse steel bar (6), characterized in that: The supporting longitudinal steel bars (1) are welded and fixed to the outer guard plate (3) in an orderly manner, thermal insulation cotton (7) is inserted into the supporting longitudinal steel bars (1) and compacted, and the outer guard plate (3) forms a casting shell area; The first transverse steel bars (5) and the second transverse steel bars (6) are staggered in an orderly manner in both vertical and horizontal directions and fixed with steel bar ties (4) to form a steel cage; A set of first transverse steel bars (5) is set up at a certain distance from the steel cage, a tortoise shell mesh (8) is laid on the first transverse steel bars (5), and the first transverse steel bars (5) and the tortoise shell mesh (8) are fixedly connected by steel bar ties (4), and then poured to form a casting layer (2).

2. A refractory heat-insulating cast structure for a combustion chamber according to claim 1, characterized in that: A tortoise shell net (8) is laid on the thermal insulation cotton (7).

3. A refractory heat-insulating cast structure for a combustion chamber according to claim 1, characterized in that: Thermal insulation cotton (7) is laid between the outer protective plate (3) and the pouring layer (2).

Images