Kiln head cover expansion joint

Abstract

The utility model discloses a kiln head cover expansion joint which comprises a rigid corrugated plate. The corrugated plate is arranged around a joint of the kiln head cover and the grate cooler; the utility model solves the problems that the expansion gap at the joint of the kiln head cover and the grate cooler is enlarged, so that fly ash escapes and cold air enters.

Description

Technical Field

[0001] The utility model relates to the technical field of cement processing equipment, in particular to a kiln head cover expansion joint. Background Art

[0002] The kiln head cover is an intermediate body that connects the kiln head end with the equipment of the next process, such as connecting the grate cooler in the cement production process. The traditional kiln head cover and the grate cooler are connected by plug-in flanges, and the space between the two flanges is filled with aluminum silicate fiber felt. When the internal refractory material is built, a 3mm expansion joint is left. Under the action of thermal expansion and contraction when the kiln is started and stopped, the expansion joint will increase, and fly ash will escape or cold wind will enter, causing a certain amount of heat loss, which will have a certain impact on the clinker calcination and also affect the surrounding environment.

[0003] The kiln hood and grate cooler are very large in size, and traditional expansion joints are not suitable for them. In addition, conventional expansion joints cannot withstand high temperatures. Therefore, technical modifications are considered to solve the problem of fly ash escape and cold air ingress caused by the enlarged expansion joint at the connection between the kiln hood and the grate cooler. Utility Model Content

[0004] The utility model aims to solve the problem that the expansion joint at the connection between a kiln head cover and a grate cooler increases, causing fly ash to escape and cold wind to enter, and provides a kiln head cover expansion joint.

[0005] The purpose of the utility model is achieved through the following technical solutions: a kiln head cover expansion joint, comprising a rigid corrugated plate; the corrugated plate is arranged around the joint between the kiln head cover and the grate cooler;

[0006] Furthermore, the corrugated plate is a metal double corrugated plate;

[0007] Furthermore, the corrugated plate is composed of a plurality of corrugated plates assembled around the joints of the kiln head cover and the grate cooler;

[0008] Furthermore, two adjacent corrugated plates are connected by welding; upper and lower edges of the corrugated plates are respectively connected to the kiln head cover and the grate cooler;

[0009] Furthermore, the inner side of the corrugated plate is filled with a layer of heat insulation material;

[0010] A further technical solution is that the thermal insulation material layer is aluminum silicate limiting cotton felt.

[0011] The utility model has the following advantages:

[0012] 1. The utility model uses a rigid corrugated plate to make an expansion joint, which is arranged around the joints of the kiln head cover and the grate cooler, which ensures the strength of the connection and provides a suitable deformation space to compensate for the axial deformation. After the expansion joint is installed, there is no more escaping dust particles on the ground around the grate cooler, and the environment is thoroughly managed;

[0013] 2. After the kiln head hood expansion joint is installed, the entry of cold air is prevented, effectively reducing heat loss. The secondary air temperature of the rotary kiln is higher than before the transformation, which has a certain promoting effect on the reduction of coal consumption indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the installation diagram of the utility model.

[0015] Figure 2 It is a partial structural schematic diagram of the utility model.

[0016] Figure 3 It is a cross-sectional view of the utility model after installation.

[0017] Figure 4 It is a cross-sectional view of the utility model.

[0018] In the figure: 1. Corrugated plate; 2. Kiln head cover; 3. Grate cooler; 4. Insulation material layer; 5. Expansion joint. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1: Figures 1 to 4 As shown, a kiln head hood expansion joint includes a rigid corrugated plate 1; the corrugated plate 1 is arranged around the joint of the kiln head hood 2 and the grate cooler 3; in this embodiment, the corrugated plate 1 is made into an expansion joint 5 with a rigid corrugated plate 1, and is arranged around the joint of the kiln head hood 2 and the grate cooler 3, which ensures the strength of the connection and provides a suitable deformation space to compensate for the axial deformation. After the expansion joint 5 is installed, there is no more escaping dust particles on the ground around the grate cooler 3, and the environment is thoroughly managed; after the expansion joint 5 of the kiln head hood 2 is installed, the entry of cold air therein is prevented, the heat loss is effectively reduced, the secondary air temperature of the rotary kiln is higher than that before the transformation, and the reduction of the coal consumption index is promoted to a certain extent.

[0026] The corrugated plate 1 is a metal double corrugated plate 1; in this embodiment, the metal material is conducive to ensuring the rigidity requirement, and any reasonable material can be selected according to needs.

[0027] The corrugated plate 1 is composed of a plurality of corrugated plates 1 assembled around the joints of the kiln head cover 2 and the grate cooler 3; in this embodiment, the corrugated plate 1 is assembled in multiple sections to match the shape and structure of the joints of the kiln head cover 2 and the grate cooler 3.

[0028] Two adjacent corrugated plates 1 are connected by welding; the upper and lower edges of the corrugated plates 1 are connected to the kiln head cover 2 and the grate cooler 3 respectively; in this embodiment, the corrugated plates 1 are assembled by welding, which is conducive to improving the sealing of the connection. The upper and lower sides of the corrugated plates 1 are welded, which is conducive to improving the sealing of the connection between the expansion joint and the kiln head cover 2 and the grate cooler 3. The upper and lower edges of the corrugated plates 1 are provided with flanges to facilitate welding; a clamping groove is provided on one side edge of the corrugated plates 1; a clamping strip is provided on the other side edge of the corrugated plates 1 corresponding to the structure of the clamping groove; the clamping strip and the clamping groove are plugged and matched before welding, which is convenient for fixing the two adjacent corrugated plates during welding and avoiding manual fixing. At the same time, since the joint between the kiln head cover 2 and the grate cooler 3 has a certain height, the protruding clamping strip is used to facilitate the hoisting of the corrugated plates 1 and avoid manual transportation to a certain height for welding.

[0029] The inner side of the corrugated plate 1 is filled with a heat insulating material layer 4; the heat insulating material layer 4 is beneficial to improving the heat insulating performance of the expansion joint and reducing heat loss.

[0030] The insulation material layer 4 is aluminum silicate fiber felt; aluminum silicate fiber felt is a new, lightweight, energy-saving refractory material. It is made of coke as the main raw material, melted at 2100°C, and processed by high-speed centrifugal method or blowing method to produce cotton-like inorganic fibers, which have fire-resistant properties and are easy to fill into the inner side of the corrugated plate 1. Any reasonable refractory material can also be selected according to needs.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A kiln head hood expansion joint, characterized by: The invention comprises a rigid corrugated plate which is arranged around the joints of the kiln head cover and the grate cooler.

2. The kiln head cover expansion joint according to claim 1, characterized in that: The corrugated plate is a metal double corrugated plate.

3. The kiln hood expansion joint according to claim 1 is characterized in that: The corrugated plate is composed of a plurality of corrugated plates assembled around the joints of the kiln head cover and the grate cooler.

4. The kiln head cover expansion joint according to claim 3 is characterized in that: Two adjacent corrugated plates are connected by welding; upper and lower edges of the corrugated plates are respectively connected to the kiln head cover and the grate cooler.

5. The kiln head cover expansion joint according to claim 1 is characterized in that: The inner side of the corrugated plate is filled with a heat insulation material layer.

6. The kiln head cover expansion joint according to claim 5 is characterized in that: The heat insulation material layer is aluminum silicate limiting cotton felt.

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