Heat preservation furnace wall of heating furnace

Abstract

The utility model provides a heat-preserving furnace wall of a heating furnace, which comprises a plurality of heat-preserving bricks piled into the heat-preserving wall; the fiber cotton is attached to the outer side of the thermal insulation wall, and an aerogel layer is laid on the outer side of the fiber cotton; at least one heating element is arranged on the inner side of the thermal insulation wall, the heating element is correspondingly connected with a conductive rod, and the conductive rod extends into the thermal insulation wall from outside to inside and is electrically connected with the heating element; a baffle is arranged at the end, corresponding to the interior of the thermal insulation wall, of the current-conducting rod, a sealing plate is arranged at the end, located on the outer side of the thermal insulation wall, of the current-conducting rod, and the current-conducting rod is in threaded connection with a locking nut so that the sealing plate can be extruded and sealed on the outer surface of the aerogel layer. And a baffle plate and a sealing plate are arranged, and the sealing plate tightly extrudes the outer surface of the aerogel layer under the action of a locking nut, so that the sealing performance is ensured, the loss is reduced, furthermore, the assembly mode can solve the problem of disassembly of an existing conductive rod, and the replacement of an internal heating element can be quickly realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating furnaces, and in particular relates to a heat-insulating furnace wall of a heating furnace. Background Art

[0002] In the metallurgical industry, a heating furnace is a device (industrial furnace) that heats materials or workpieces (usually metals) to rolling and forging temperature. Heating furnaces are used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals. The inner wall of the heating furnace is usually equipped with a heating furnace insulation lining.

[0003] The electric heating elements of the heating furnace are electric heating wires, silicon carbon rods, etc. This kind of resistance heating is mainly completed by radiation. Generally, the furnace wall is built with insulation bricks. During the operation of the heating furnace, it needs to withstand high temperature heat load, resist chemical corrosion and reduce heat loss. The electric heating elements are powered by conductive rods extending from the outside to the inside, but the gap between the conductive rods and the insulation bricks will cause heat to be transferred, generating energy consumption and bringing adverse effects to the staff operating near the furnace body. In addition, the conductive rods and the insulation wall are fixed with high temperature resistant adhesives, which makes it difficult to disassemble and replace the conductive rods.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art. The utility model provides a heat-insulating furnace wall of a heating furnace.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heating furnace insulation wall, comprising:

[0008] Insulation bricks, a plurality of which are stacked to form an insulation wall;

[0009] Fiber cotton, the fiber cotton is attached to the outer side of the thermal insulation wall, and an aerogel layer is laid on the outer side of the fiber cotton;

[0010] Heating elements, at least one of which is disposed inside the insulation wall, and each of which is connected to a conductive rod, which extends from the outside into the insulation wall and is electrically connected to the heating element;

[0011] Among them, a baffle is provided at one end of the conductive rod corresponding to the inside of the insulation wall, and a sealing plate is provided at one end of the conductive rod located outside the insulation wall. The conductive rod is threadedly connected with a locking nut to squeeze and seal the sealing plate on the outer surface of the aerogel layer.

[0012] Preferably, the heating element is an electric heating wire, a mounting groove is provided on the inner side of the thermal insulation brick, and a wire hanging nail is provided in the mounting groove to support the electric heating wire.

[0013] Preferably, the inner wall of the thermal insulation brick is provided with a horizontal groove and a plurality of longitudinal grooves intersecting with the horizontal groove;

[0014] The upper end of the hanging screw is located at the intersection of the horizontal groove and the longitudinal groove. One end of the hanging screw is provided with at least one horizontal bend extending along the horizontal groove, and the other end of the hanging screw is provided with a vertical bend 13 extending toward the inner side of the insulation wall.

[0015] Preferably, the length of the hanging screw is greater than the distance between the horizontal groove and the lower edge of the insulation brick.

[0016] Preferably, the vertical bends 13 of two adjacent rows of the wire hanging nails in the longitudinal direction are away from each other, and the electric heating wire is wound in an S shape between the two rows of the wire hanging nails.

[0017] Preferably, the heating element has multiple sections, and two ends of each section of the heating element are correspondingly connected to a conductive rod.

[0018] Beneficial effect: a baffle and a sealing plate are provided, and under the action of the locking nut, the sealing plate squeezes the outer surface of the aerogel layer, thereby ensuring the sealing performance and reducing the loss. Furthermore, this assembly method can solve the problem of disassembly of the existing conductive rod and can quickly realize the replacement of the internal heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of the structure of the thermal insulation brick in the specific embodiment provided by the utility model;

[0021] Figure 2 A schematic diagram of the winding of the electric heating wire in a specific embodiment provided by the utility model;

[0022] Figure 3 The present invention is a simplified structural diagram of a screw nail in a specific embodiment provided by the present invention.

[0023] In the figure: 1. Insulation brick; 2. Fiber cotton; 3. Aerogel layer; 4. Horizontal groove; 5. Longitudinal groove; 6. Conductive rod; 7. Baffle; 8. Sealing plate; 9. Locking nut; 10. Hanging screw; 11. Electric heating wire; 101. Horizontal bend; 102. Vertical bend 13. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0025] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0027] like Figure 1-3 As shown, a heating furnace insulation furnace wall includes insulation bricks 1, fiber wool 2 and heating elements. A plurality of insulation bricks 1 are stacked to form an insulation wall. The insulation bricks 1 are made of mullite prefabricated parts. The insulation bricks 1 are solidified by high-temperature adhesive. Fiber wool 2 is attached to the outside of the insulation wall, and an aerogel layer 3 is laid on the outside of the fiber wool 2. At least one heating element is arranged on the inside of the insulation wall. The heating element is correspondingly connected with a conductive rod 6. The conductive rod 6 extends into the insulation wall from the outside to the inside. After the conductive rod 6 is extended into the insulation wall, it is electrically connected to the heating element for supplying power to the heating element so that the heating element generates high temperature to heat the material in the furnace.

[0028] Among them, a baffle 7 is provided at one end of the conductive rod 6 corresponding to the inside of the insulation wall, and a mounting hole corresponding to the conductive rod 6 is opened on the corresponding outside of the insulation brick 1. The mounting hole can be set at the joint of two adjacent insulation bricks 1, or located in the middle of the insulation brick 1, and no excessive restrictions are made here.

[0029] The conductive rod 6 can be a metal rod, and the baffle 7 can be integrally formed with the conductive rod 6, or connected to the conductive rod 6 by threaded connection or the like. A sealing plate 8 is provided at one end of the conductive rod 6 located on the outside of the insulation wall. The sealing plate 8 is made of a high-temperature resistant material. The conductive rod 6 is threadedly connected with a locking nut 9. The locking nut 9 is rotated to squeeze and seal the sealing plate 8 on the outer surface of the aerogel layer 3, thereby achieving a sealing effect, and there is no need to fill an adhesive between the outer wall of the conductive rod 6 and the mounting hole.

[0030] In an optional embodiment, the insulation bricks 1 are stacked to form a box-type structure with a furnace opening on one side to form the furnace wall of the insulation furnace, and the heating elements are arranged in the effective area of ​​the furnace door-two side walls-rear wall, so that the heating is uniform, the temperature rise is reliable, and the overall heating surface is uniform. A panel is set on the furnace opening, and a TUS temperature measurement reserved port is set on the left and right of the panel, which meets the requirements of AMS2750G and is used for furnace temperature calibration.

[0031] In this embodiment, the heating element is an electric heating wire 11, and an installation groove is opened on the inner side of the insulation brick 1. The installation groove is used to connect the hanging wire nail 10. The hanging wire nail 10 is used to support the electric heating wire 11 and maximize the space in the furnace, thereby reducing the space occupancy rate.

[0032] In an optional implementation, a horizontal groove 4 and a plurality of longitudinal grooves 5 intersecting with the horizontal groove 4 are provided on the inner wall of the insulation brick 1. The wire nail 10 can be installed in the corresponding longitudinal groove 5 according to the number and distribution of the electric heating wires 11 actually designed. The upper end of the wire nail 10 is located at the intersection of the horizontal groove 4 and the longitudinal groove 5. One end of the wire nail 10 is provided with at least one horizontal bend 12 extending along the horizontal groove 4, so that it can be stuck in the horizontal groove 4 to limit the position. The other end of the wire nail 10 is provided with a vertical bend 13 extending toward the inner side of the insulation wall, which is used for winding the electric heating wire 11 and supporting the electric heating wire 11.

[0033] The horizontal bend 12 and the vertical bend 13 can be of the same length, so that the screw nail 10 can be used quickly without confirming whether the installation direction is correct.

[0034] The length of the hanging screw 10 is greater than the distance between the horizontal groove 4 and the lower edge of the insulation brick 1, so that the hanging screw 10 is stuck between the gaps of two adjacent insulation bricks 1, thereby fixing the two adjacent insulation bricks 1 to prevent the insulation bricks 1 from deformation and displacement.

[0035] In this embodiment, two rows of wire nails 10 are used as a group to install the electric heating wire 11. Specifically, at least two rows of wire nails 10 are arranged on one side of the heating furnace to install the heating wire. The vertical bends 13 of the two corresponding rows of wire nails 10 are away from each other, thereby forming two rows of winding points. The electric heating wire 11 is wound in an S shape between the winding points formed by the two rows of wire nails 10.

[0036] Of course, there is no need to have a corresponding wire nail 10 in each longitudinal groove 5 , and the wire nails 10 can be selectively installed according to the actual bending density and travel path of the electric heating wire 11 .

[0037] In an optional embodiment, the heating element has multiple sections, and the multiple sections of the heating elements are connected in parallel, so as to avoid the problem of one section burning and failing to heat. A conductive rod 6 is connected to both ends of each section of the heating element, and independent disassembly and maintenance can be achieved. A steel frame is set up outside the box-type structure stacked with insulation bricks 1, and the inner side of the steel frame is close to the insulation bricks 1, and an outer shell is set on the outer side. The outer shell is provided with an independent window corresponding to each conductive rod 6, and an inspection door is hinged on the window.

[0038] In an optional embodiment, the hanging screw 10 is made of a high temperature resistant material, such as high temperature resistant steel or the same material as the insulation brick 1. The cross-section of the hanging screw 10 can be circular or directional, and the cross-sections of the corresponding horizontal grooves 4 and vertical grooves are adapted to the cross-section of the hanging screw 10. A heat-resistant consolidation material is provided between the hanging screw 10 and the corresponding installation groove for fixing.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A heating furnace insulation wall, characterized in that: include: Insulation bricks, a plurality of which are stacked to form an insulation wall; Fiber cotton, the fiber cotton is attached to the outer side of the thermal insulation wall, and an aerogel layer is laid on the outer side of the fiber cotton; A heating element, at least one of which is disposed inside the insulation wall, and the heating element is connected to a conductive rod corresponding to the heating element, the conductive rod extends from the outside to the inside into the insulation wall and is electrically connected to the heating element; Among them, a baffle is provided at one end of the conductive rod corresponding to the inside of the insulation wall, and a sealing plate is provided at one end of the conductive rod located outside the insulation wall. The conductive rod is threadedly connected with a locking nut to squeeze and seal the sealing plate on the outer surface of the aerogel layer.

2. The heating furnace insulation wall according to claim 1, characterized in that: The heating element is an electric heating wire. A mounting groove is provided on the inner side of the thermal insulation brick. A wire hanging nail is provided in the mounting groove to support the electric heating wire.

3. The heating furnace insulation wall according to claim 2, characterized in that: The inner wall of the thermal insulation brick is provided with a horizontal groove and a plurality of longitudinal grooves intersecting with the horizontal groove; The upper end of the hanging screw is located at the intersection of the horizontal groove and the longitudinal groove, one end of the hanging screw is provided with at least one horizontal bend extending along the horizontal groove, and the other end of the hanging screw is provided with a vertical bend extending toward the inner side of the insulation wall.

4. The heating furnace insulation wall according to claim 3, characterized in that: The length of the hanging screw is greater than the distance between the horizontal groove and the lower edge of the insulation brick.

5. The heating furnace insulation wall according to claim 3, characterized in that: The vertical bends of two rows of wire hanging nails adjacent to each other in the longitudinal direction are far away from each other, and the electric heating wire is wound in an S shape between the two rows of wire hanging nails.

6. The heating furnace insulation wall according to claim 1, characterized in that: The heating element has multiple sections, and two ends of each section of the heating element are correspondingly connected to a conductive rod.

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