Fixed connecting structure for cooling wall of blast furnace

Abstract

The utility model relates to a blast furnace cooling wall fixed connection structure which realizes the fixed connection of a cooling wall and a furnace shell through the combination of a common bolt and a cylindrical head bolt. Particularly, the cylindrical head bolt comprises a screw, a nut, a spherical base and a spherical washer, and deformation can be released through stretching and swinging of the screw when the cooling wall is heated to deform. The problem of bolt breakage caused by the fact that a traditional fixing mode cannot absorb thermal deformation is solved. The structure is simple, installation is easy, the service life of the cooling wall can be effectively prolonged, and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace equipment and relates to a blast furnace cooling wall fixed connection structure. Background Art

[0002] The cooling wall is an important equipment of the blast furnace, which is used to cool the high temperature inside the blast furnace. The traditional fixing form of the cooling wall usually uses 4 fixing bolts to completely fix the cooling wall on the furnace shell. In recent years, with the continuous improvement of smelting intensity, the temperature of the cooling wall is getting higher and higher, and the deformation of the cooling wall is getting more and more serious. The completely fixed bolt structure cannot absorb the serious deformation of the cooling wall. In some blast furnace cooling walls, the bolts are sheared off by the furnace shell due to serious deformation, which seriously affects the life of the cooling wall. Utility Model Content

[0003] In view of this, the purpose of the utility model is to solve various problems caused by thermal deformation of the cooling wall, and to propose a blast furnace cooling wall fixed connection structure, which can effectively release the thermal deformation of the cooling wall.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] A blast furnace cooling wall fixed connection structure, one end of the cooling wall is fixedly connected to the furnace shell by ordinary bolts, and the other end is connected to the furnace shell by cylindrical head bolts; the cylindrical head bolts include a screw, a nut, a spherical base, and a spherical washer;

[0006] The furnace shell and the cooling wall are both provided with connection holes for installing cylindrical head bolts, and an arc groove is provided at one end of the connection hole on the cooling wall away from the furnace shell; a cylindrical head is provided at one end of the screw rod to form a T-shaped structure, and the cylindrical head is located in the arc groove, and the other end of the screw rod passes through the connection hole, and the cooling wall and the furnace shell are connected by a nut, and the spherical base and the spherical washer are provided between the nut and the cooling wall, and the spherical washer and the spherical base are matched by a spherical surface;

[0007] A gap is provided between the screw and the connecting hole on the cooling wall. When the cooling wall is deformed by heat, the screw is stretched and driven to move in the gap with the spherical center of the spherical gasket as the center, thereby releasing the deformation of the cooling wall.

[0008] Furthermore, the gap between the screw and the connecting hole on the cooling wall is 6 to 15 mm.

[0009] Furthermore, the tensile elongation of the screw is 0.6 to 1.5 mm.

[0010] Furthermore, one or more common bolts and cylindrical head bolts are provided respectively, and all the common bolts are located at the same end of the cooling wall, and all the cylindrical head bolts are located at the other end of the cooling wall.

[0011] Furthermore, one end of the common bolt and the cylindrical head bolt is provided with a sealing cover.

[0012] The beneficial effects of the utility model are:

[0013] 1. Effectively release thermal deformation: By using cylindrical head bolts and ordinary bolts in combination, the deformation can be effectively released when the cooling wall is deformed by heat, avoiding bolt breakage due to excessive deformation.

[0014] 2. Improve service life: Since the thermal deformation can be effectively released, this structure can reduce the local stress concentration of the cooling wall, thereby reducing wear and tear and improving the service life of the cooling wall.

[0015] 3. Strong adaptability: By setting different gaps and tensile elongation, this structure can be adjusted according to different working conditions and degrees of thermal deformation, and has good adaptability.

[0016] 4. The bolts are better able to bear stress: Compared with the inability to rotate, even when stretched, the cylindrical head bolts are first stretched and then sheared. The tensile strength of the bolts is greater than their shear strength. Therefore, the cylindrical head bolts used in the present invention have better stress conditions.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is an overall schematic diagram of the fixed connection structure of the blast furnace cooling wall of the utility model.

[0020] Figure 2 for Figure 1 Side view of.

[0021] Figure 3 It is a schematic diagram of the structure of a cylindrical head bolt.

[0022] Figure 4 for Figure 3 AA view of the .

[0023] Figure 5 This is a schematic diagram of the connection of ordinary bolts.

[0024] Figure markings: 1-cooling wall; 2-furnace shell; 3-complete fixing point; 4-rotatable fixing point; 5-ordinary screw; 6-nut; 7-flat washer; 8-sealing cover; 9-spherical washer; 10-spherical base; 11-screw; 12-cylinder head; 13-arc groove. DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] See also Figures 1 to 5, which is a fixed connection structure of a blast furnace cooling wall. One end of the cooling wall 1 is fixedly connected to the furnace shell 2 by ordinary bolts, and the other end is connected to the furnace shell 2 by a cylindrical head 12 bolt; the cylindrical head 12 bolt includes a screw rod 11, a nut 6, a spherical base 10, and a spherical washer 9; a penetrating connection hole is provided on the cooling wall 1 and the furnace shell 2, and an arc groove 13 is provided on the end of the connection hole on the cooling wall 1 away from the cooling wall 1; a cylindrical head 12 is provided at one end of the screw rod 11 to form a T-shaped structure, and the cylindrical head 12 Located in the arc groove 13, the other end of the screw 11 passes through the connecting hole, and the cooling wall 1 is connected to the furnace shell 2 through the nut 6. The spherical base 10 and the spherical washer 9 are arranged between the nut 6 and the cooling wall 1, and the spherical washer 9 and the spherical base 10 are spherically matched; a gap is set between the screw 11 and the connecting hole. When the cooling wall 1 is deformed by heat, the screw 11 is stretched and driven to swing in the gap with the spherical center of the spherical washer 9 as the center, thereby releasing the deformation of the cooling wall 1.

[0029] Among them, one end of the ordinary bolt and the cylindrical head 12 bolt are both provided with a sealing cover 8.

[0030] The gap between the screw 11 and the connecting hole on the cooling wall 1 is 6 to 15 mm. In this embodiment, the gap is 10 mm.

[0031] The tensile elongation of the screw rod 11 is 0.6-1.5 mm. In this embodiment, the actual tensile elongation of the screw rod 11 is 0.7 mm.

[0032] One or more common bolts and cylindrical head 12 bolts are respectively provided, and all the common bolts are located at the same end of the cooling wall 1, and all the cylindrical head 12 bolts are located at the other end of the cooling wall 1.

[0033] The common bolts include common screw rods 5 and flat washers 7. The common screw rods 5 are connected to the cooling wall 1 through threads, and the furnace shell 2 is pressed and fixed through nuts 6 and flat washers 7.

[0034] In the utility model, two completely fixed points 3 located at the lower part of the cooling wall 1 are used to completely fix the cooling wall 1 on the furnace shell 2 through two common bolts. The cooling wall 1 located at the lower part of the completely fixed points 3 can be deformed freely when subjected to high temperature. Two rotatable fixed points 4 located at the upper part of the cooling wall 1 are used to connect the cooling wall 1 with the furnace shell 2 through cylindrical head 12 bolts. When the cooling wall 1 is deformed due to high temperature, the cooling wall 1 drives the screw 11, nut 6 and spherical washer 9 of the rotatable fixed points 4 to rotate freely within a certain range along the spherical surface of the spherical washer 9, thereby releasing the deformation of the cooling wall 1 at the upper part of the completely fixed points 3 caused by the high temperature, releasing the deformation of the cooling wall 1 from the upper and lower directions of the completely fixed points 3, avoiding the connection bolts of the cooling wall from being sheared off by the furnace shell due to the deformation of the cooling wall, and extending the service life of the cooling wall, especially the service life in a high temperature environment.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A blast furnace cooling wall fixed connection structure, characterized in that: One end of the cooling wall is fixedly connected to the furnace shell by ordinary bolts, and the other end is connected to the furnace shell by cylindrical head bolts; the cylindrical head bolts include a screw rod, a nut, a spherical base, and a spherical washer; The furnace shell and the cooling wall are both provided with connection holes for installing cylindrical head bolts, and an arc groove is provided at one end of the connection hole on the cooling wall away from the furnace shell; a cylindrical head is provided at one end of the screw rod to form a T-shaped structure, and the cylindrical head is located in the arc groove, and the other end of the screw rod passes through the connection hole, and the cooling wall and the furnace shell are connected by a nut, and the spherical base and the spherical washer are provided between the nut and the cooling wall, and the spherical washer and the spherical base are matched by a spherical surface; A gap is provided between the screw and the connecting hole on the cooling wall. When the cooling wall is deformed by heat, the screw is stretched and driven to move in the gap with the spherical center of the spherical gasket as the center, thereby releasing the deformation of the cooling wall.

2. The blast furnace cooling wall fixed connection structure according to claim 1, characterized in that: The gap between the screw and the connecting hole on the cooling wall is 6-15 mm.

3. The blast furnace cooling wall fixed connection structure according to claim 1, characterized in that: The tensile elongation of the screw is 0.6 to 1.5 mm.

4. The blast furnace cooling wall fixed connection structure according to claim 1, characterized in that: One or more common bolts and cylindrical head bolts are provided respectively, and all common bolts are located at the same end of the cooling wall, and all cylindrical head bolts are located at the other end of the cooling wall.

5. The blast furnace cooling wall fixed connection structure according to claim 1, characterized in that: One end of the common bolt and the cylindrical head bolt are both provided with a sealing cover.

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