Coke oven cross brace correction method

Abstract

A coke oven cross brace correction method is characterized by comprising the following steps of a, manufacturing a correction support of a coke oven cross brace, b, arranging a groove and a notch of an H-shaped steel support on the two sides of a deformation part, c, arranging a jack between a cross beam and the deformation part of the cross brace, d, baking the deformation part of the cross brace, applying pressure by using the jack at the same time, and e, keeping the posture of the H-shaped steel bracket during the cooling period of the cross brace, and removing the H-shaped steel bracket after the temperature is reduced to normal temperature to complete the correction of the coke oven cross brace. The coke oven cross brace correction method has the advantages that the profile steel is used as the main frame, correction can be realized by matching with the jack, the manufacturing is simple, the correction operation is safe and convenient, and the cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of coke oven equipment installation and construction, in particular to a coke oven transverse brace correction method. Background Art

[0002] During the production process of the coke oven, the refractory brick masonry of the furnace body will produce thermal expansion. The expansion of the coke oven masonry is a complex process, which will produce a large expansion force in the width direction of the furnace. The cross brace is like a "tightening spell", which exerts a restraining force on the furnace body to prevent the masonry from being damaged due to expansion. The cross brace can disperse the force generated by the expansion of the furnace body to other parts of the coke oven steel structure. This allows the furnace body to expand within a controllable range, maintain the shape and dimensional accuracy of the coke oven carbonization chamber, and ensure the integrity and stability of the coke oven masonry.

[0003] In order to ensure the normal expansion of the coke oven, the size, position, and force direction of the cross brace must meet the design requirements. Before installation, the key dimensions such as the length and diameter of the brace must be accurately measured and checked. Because if the size of the brace is inaccurate, it may not be installed correctly to the corresponding position, affecting its tensile force on the furnace body. Its installation error should generally be controlled within a very small range, at the millimeter level. If the position is installed incorrectly, the stability of the entire building structure will be affected.

[0004] During the installation of the coke oven, the cross braces are often bent and deformed due to the reverse transportation and pre-installation process, which will cause the braces to not be accurately located in the brace grooves during the expansion process. Factors such as the change in force direction will affect the expansion of the coke oven masonry. This will affect the subsequent production of the coke oven. Therefore, the bent and deformed cross braces must be corrected. However, the method for inspecting and repairing the upper cross braces of a coke oven in CN117467458A and the method and device for replacing the upper cross braces of a coke oven in CN220467874U have complicated installation processes and poor safety. Therefore, in the prior art, it has become a technical problem to be solved in this field to propose a cross brace correction method that is simple to operate and highly safe. Summary of the invention

[0005] The purpose of the present invention is to provide a safe and reliable method for correcting coke oven cross braces.

[0006] To achieve the above purpose, the technical solution of the present invention is: A coke oven cross brace correction method, characterized by comprising the following steps: a. Making a correction bracket for the coke oven cross brace, the correction bracket is an atypical H-shaped steel bracket, a cross beam is provided in the middle of the H-shaped steel bracket, both ends of the cross beam are vertically welded to the support, and a groove is provided at the bottom end of the support, and the notch of the groove is supported on the coke oven cross brace when in use; b. Set the grooves and notches of the H-shaped steel bracket on both sides of the deformed part; c. Set the jack between the crossbeam and the deformed part of the cross brace; d. Bake the deformed parts of the cross brace and apply pressure with a jack to straighten the cross brace; e. Keep the H-shaped steel bracket in position during the cooling period of the cross-bracing bar. After the temperature drops to normal temperature, remove the H-shaped steel bracket to complete the correction of the coke oven cross-bracing bar.

[0007] The coke oven cross brace correction method of the present invention can also be further implemented by adopting the following technical measures.

[0008] The aforementioned method, wherein the notch can be conveniently moved on the cross brace supported on the coke oven.

[0009] In the aforementioned method, the baking is performed by heating with a welding torch.

[0010] After adopting the above technical solution, the coke oven cross brace correction method of the present invention has the following advantages: 1. Use steel as the main frame and use jacks to achieve correction, which is simple to make and low in cost; 2. The length of the middle crossbeam of the main frame can be pre-adjusted according to the length of the bending deformation area, with high adaptability; the use of tooling and tools is highly maneuverable, unrestricted, and highly adaptable; the main frame is provided with a lower notch, and the notch and the cross brace are movable to ensure that the tooling will not be deformed during the correction process of the brace; 3. The correction of the cross-bracing bar will not damage the strength of the cross-bracing bar and will not affect the subsequent construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the use status of the correction tooling according to an embodiment of the present invention.

[0012] In the figure: 1 horizontal brace, 2 pillars, 3 beams, 4 jacks, 5 notches, 6 deformation points. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with embodiments and accompanying drawings.

[0014] Example 1 During the installation of the coke oven cross braces in the new coke oven project of the steel plant, there were 260 cross braces in total. The cross braces were φ48 round steel with a length of 26m and a center deviation of ±5mm during installation. During the construction process, some of the cross braces were bent and deformed due to pressure, with a deformation area of ​​about 200mm, and adjustments were required.

[0015] Please refer to Figure 1 , Figure 1The coke oven cross brace correction method of the present invention comprises the following steps: Step 1: Make a calibration tool.

[0016] 1. Use 16# channel steel to weld an H-shaped frame.

[0017] 2. Use φ50mm steel pipes as notches at the bottom of the two side pillars 2, so that the notches 5 are inserted into the horizontal braces 1.

[0018] Step 2: Set the notches 5 of the tooling on both sides of the deformation point 6.

[0019] Step 3: Set the 3t jack 4 between the tooling beam 3 and the deformed part of the cross brace.

[0020] Step 4: Bake the deformed part of the cross-bracing rod with a welding torch, and slowly pressurize the jack to straighten the cross-bracing rod.

[0021] Step 5: After the cross brace is straightened, wait for the temperature to drop. During the cooling period, keep the tooling posture. After the temperature drops to room temperature, remove the tooling and the cross brace correction is completed.

[0022] The present invention has substantial characteristics and significant technical progress. The coke oven cross-brace correction method of the present invention uses steel sections as the main frame and can achieve correction in conjunction with a jack. The method is simple to manufacture and has low cost. The cross-brace can be effectively adjusted and corrected, avoiding the need to replace the cross-brace due to deformation, and avoiding the thermal expansion of the furnace body affected by the deformation of the cross-brace.

[0023] The above embodiments are only for the purpose of illustrating the present invention, but not for limiting the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A coke oven cross brace correction method, characterized in that The following steps are involved: a. Making a correction bracket for the coke oven cross brace, the correction bracket is an atypical H-shaped steel bracket, a cross beam is provided in the middle of the H-shaped steel bracket, both ends of the cross beam are vertically welded to the support, and a groove is provided at the bottom end of the support, and the notch of the groove is supported on the coke oven cross brace when in use; b. Set the grooves and notches of the H-shaped steel bracket on both sides of the deformed part; c. Set the jack between the crossbeam and the deformed part of the cross brace; d. Bake the deformed parts of the cross brace and apply pressure with a jack to straighten the cross brace; e. Keep the H-shaped steel bracket in position during the cooling period of the cross-bracing bar. After the temperature drops to normal temperature, remove the H-shaped steel bracket to complete the correction of the coke oven cross-bracing bar.

2. The coke oven cross brace correction method according to claim 1, characterized in that: The notch can be conveniently moved on the cross brace supported on the coke oven.

3. The coke oven cross brace correction method according to claim 1, characterized in that: The baking is heated by a welding torch.

Images