POC gas holder side plate deformation repairing method

Abstract

The invention discloses a POC gas holder side plate deformation repairing method, and relates to the technical field of gas storage, and the method comprises the following steps: measuring the deformation quantity of a gas holder deformation area; determining the shape, size, quantity and welding sequence of the repair material based on the deformation quantity of the gas holder deformation area, and prefabricating the repair material; and the repairing materials are sequentially welded to the gas holder deformation area based on the welding sequence. According to the method, the cross section of a standard gas holder is uniformly divided into a plurality of fan-shaped areas, and the distance between a preset point position on an arc of each fan-shaped area and a chord formed by two adjacent stand columns is calculated based on design parameters of the gas holder and serves as a reference distance; determining the deformation quantity of the deformation area of the gas holder according to the deformation value, obtained through actual measurement, of the preset point position, prefabricating steel plates used for repairing the deformation area according to the deformation quantity, and sequentially welding the steel plates to the deformation area, so that the outer bulge condition of the side wall of the gas holder is effectively repaired; and the side plate of the gas holder can meet the requirement of safe and stable use of the gas holder after being repaired.

Description

Technical Field

[0001] The invention relates to the technical field of gas storage, and in particular to a method for repairing deformation of a POC gas cabinet side plate. Background Art

[0002] POC dry gas holder is a new type of dry gas holder that integrates the technical advantages of Kolon gas holder and MAN gas holder. It is mainly composed of piston, oil sealing system and cylindrical shell (see the specific structure for details). Figure 1 ). Its main features are: it adopts a cylindrical structure and a spherical piston structure, which can withstand higher pressure; it uses sealing rubber instead of the metal slide plate of the Man-type cabinet, which can better adapt to the changes in the side panels of the gas cabinet, the piston runs fast, and the gas throughput is large. Therefore, the POC dry gas cabinet is particularly suitable for the recycling of blast furnace and coke oven gas in steel enterprises.

[0003] However, in actual use, it is found that as the gas cabinet is used for a longer time and the maintenance is not in place, the side plate near the column in the upper middle part of the gas cabinet will bulge outward, which will cause the gap between the sealing rubber block and the side plate of the gas cabinet to become larger and the sealing oil to leak a lot, which will cause the oil pump of the sealing system to start frequently and the sealing oil in the piston oil groove to change frequently, affecting the balance of the piston and causing safety accidents. Therefore, when it is found that the deformation of the side plate of the gas cabinet exceeds a certain range, it is necessary to stop the operation or control the piston running stroke to prevent the piston from reaching the height of the deformed part of the side plate of the gas cabinet, which will also reduce the available cabinet capacity of the gas cabinet and reduce the role of the gas cabinet in the pipeline network. As the gas cabinet runs for a long time with problems, the deformation of the side plate of the gas cabinet will gradually become more serious, and irreparable damage will occur, and even the gas cabinet will be scrapped prematurely. At present, there is no repair method for this kind of fault in China. It is only by adjusting the sealing structure and reducing the piston running stroke to reduce the equipment hidden dangers caused by the deformation of the side plate, and it is impossible to solve the problem in depth. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for repairing deformation of a POC gas cabinet side panel.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: A method for repairing deformation of a POC gas cabinet side panel, comprising: Measure the deformation amount of the gas cabinet deformation area; Determine the shape, size, quantity and welding sequence of the repair material based on the deformation amount of the gas cabinet deformation zone, and prefabricate the repair material; The repair materials are welded to the deformed areas of the gas cabinet in sequence based on the welding sequence.

[0006] As a preferred solution of the POC gas cabinet side plate deformation repair method of the present invention, wherein: the deformation amount of the gas cabinet deformation area is measured including: Get the gas cabinet diameter, number of columns, and side panel thickness; The standard gas cabinet is evenly divided into a number of sector-shaped areas, and the center of each sector-shaped area is located on the axis of the gas cabinet, and the two ends of the arc are respectively located on the straight line where two adjacent columns are located; Measure the distance between the preset point on the arc of each sector area and the chord formed by two adjacent columns, and use it as the reference distance; Fix a ruler in the sector-shaped area where the deformed area of ​​the gas cabinet to be repaired is located, and fix the two ends of the ruler on the two pillars in the corresponding sector-shaped area respectively. Calculate the actual distance between the preset point on the side panel of the gas cabinet and the ruler, and compare it with the corresponding reference distance to determine the deformation value of each preset point; The deformation amount of the gas cabinet deformation area is determined based on the deformation values ​​of all preset points.

[0007] As a preferred solution of the method for repairing deformation of the POC gas cabinet side panel of the present invention, the repair material is a steel plate, and the material of the steel plate is the same as that of the gas cabinet side panel.

[0008] As a preferred solution of the POC gas cabinet side plate deformation repair method of the present invention, the prefabricated repair material comprises: The plates are cut based on the number of layers and shape of the repaired steel plates, and then polished and painted for anti-corrosion treatment.

[0009] As a preferred solution of the POC gas cabinet side plate deformation repair method of the present invention, the method of welding the repair material to the gas cabinet deformation area in sequence based on the welding sequence includes: The repair materials are welded to the deformed area inside the side plate in sequence, and each piece of repair material is polished after welding until the thickness of the weld is less than or equal to the threshold.

[0010] As a preferred solution of the POC gas cabinet side panel deformation repair method described in the present invention, wherein: the threshold value is 1 mm.

[0011] As a preferred solution of the POC gas cabinet side plate deformation repair method of the present invention, after the repair materials are sequentially welded to the gas cabinet deformation area based on the welding sequence, it also includes: Measure the welding part and grind it with a grinder when the patch thickness is greater than the reference value. When the patch thickness is less than the reference value, patch it according to the measured value until the gap between the rubber block in the sealing device and the side panel is less than or equal to 0.5mm.

[0012] The beneficial effects of the present invention are: The present invention evenly divides the cross-section of a standard gas tank into a number of sector-shaped areas, calculates the distance between a preset point on the arc of each sector-shaped area and the chord formed by two adjacent columns based on the design parameters of the gas tank as a reference distance, and then determines the deformation amount of the deformation area of ​​the gas tank according to the deformation value of the preset point actually measured, and then prefabricates steel plates for repairing the deformation area according to the deformation amount, and welds the steel plates to the deformation area in sequence, effectively repairing the external bulging on the side wall of the gas tank, and making the side panels of the gas tank meet the requirements for safe and stable use of the gas tank after repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0014] Figure 1 A schematic flow chart of the POC gas cabinet side panel deformation repair method provided by the present invention. DETAILED DESCRIPTION

[0015] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific implementation modes and in combination with the accompanying drawings.

[0016] Figure 1 A schematic diagram of a process for repairing a POC gas cabinet side panel deformation provided in an embodiment of the present application. The method specifically comprises the following steps: Step S101: measuring the deformation amount of the deformation area of ​​the gas cabinet.

[0017] Specifically, the deformation of the gas cabinet side panel is generally a fan-shaped bulge, and the deformation of the gas cabinet needs to be measured. Before measurement, the measurement benchmark needs to be determined first, that is, the diameter, number of columns, and side panel thickness of the standard gas cabinet are determined according to the design drawings of the gas cabinet as the basis for subsequent calculations.

[0018] After obtaining the above parameters, the cross section of the standard gas cabinet is evenly divided into several sector-shaped areas, the center of each sector-shaped area is located on the axis of the gas cabinet, and the two ends of the arc are located on the straight line where two adjacent columns are located. Then, the distance between the preset point on the arc of each sector-shaped area and the chord formed by two adjacent columns is measured and used as the reference distance.

[0019] After calculating the reference spacing of all preset points, measure the deformation of the gas cabinet deformation area. Fix the ruler to the sector area where the deformation area of ​​the gas cabinet to be repaired is located, and fix the two ends of the ruler to the two pillars in the corresponding sector area. Calculate the actual spacing between the preset points on the gas cabinet side panel and the ruler, and compare it with the corresponding reference spacing to determine the deformation value of each preset point. The deformation value of the gas cabinet deformation area can be determined by the deformation values ​​of all preset points.

[0020] It should be noted that the above-mentioned preset points can be evenly selected at several points on the arc segment, depending on the actual usage.

[0021] Step S102: determining the shape, size, quantity and welding sequence of the repair material based on the deformation amount of the gas cabinet deformation zone, and prefabricating the repair material.

[0022] Specifically, the above-mentioned repair material is a steel plate, and the material of the steel plate is the same as that of the gas cabinet side plate. According to the design material of the gas cabinet, a steel plate with the same composition is selected for prefabrication, and welding rods that meet the requirements are used for welding.

[0023] Prefabricate the steel plates of corresponding shapes according to the measured values. According to the actual measured values, determine the number of layers and shapes of steel plates to be used for cutting and prefabrication, and polish and paint for anti-corrosion treatment. Taking a 20,000 cubic meter POC gas tank in a gas plant as an example, the design requirement for the gap between the rubber block of the sealing device and the side plate is ≤0.5mm, so 1mm thick steel plates are actually selected for stacking and welding repair. Through stacking and polishing, the gap between the side plates finally meets the requirements.

[0024] Step S103: welding the repair material to the deformed area of ​​the gas cabinet in sequence based on the welding sequence.

[0025] Specifically, the steel plate prefabricated in step S102 is used to repair the deformed area of ​​the gas cabinet side panel. The deformation of the side panel is generally manifested as a semicircular bulge, that is, a shape that is deep in the middle and shallow around. Use the prefabricated steel plate to patch the innermost side, and pay attention to the welding thickness. After each steel plate is welded, grind it until the thickness of the weld is less than or equal to 1mm before welding the next steel plate, and so on, until all prefabricated steel plates are completely welded.

[0026] It should be noted that after the prefabricated steel plates are welded, it is necessary to use tools such as a flat ruler, a level ruler, and a micrometer to measure the welding parts, and use a grinder to grind the welding parts when the patch thickness is greater than the reference value. When the patch thickness is less than the reference value, patch according to the measured value until the gap between the rubber block in the sealing device and the side panel is less than or equal to 0.5mm.

[0027] Therefore, the technical solution of the present application evenly divides the cross-section of the standard gas tank into several sector-shaped areas, and calculates the distance between the preset point on the arc of each sector-shaped area and the chord formed by two adjacent columns based on the design parameters of the gas tank as the reference distance, and then determines the deformation amount of the deformation area of ​​the gas tank according to the deformation value of the preset point obtained by actual measurement. Thereafter, steel plates for repairing the deformation area are prefabricated according to the deformation amount, and the steel plates are welded to the deformation area in turn, thereby effectively repairing the external bulging on the side wall of the gas tank, and making the side panel of the gas tank meet the requirements for safe and stable use of the gas tank after repair.

[0028] In addition to the above embodiments, the present invention may also have other implementation modes; any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A method for repairing deformation of a POC gas cabinet side panel, characterized in that: include: Measure the deformation amount of the gas cabinet deformation area; Determine the shape, size, quantity and welding sequence of the repair material based on the deformation amount of the gas cabinet deformation zone, and prefabricate the repair material; The repair materials are welded to the deformed areas of the gas cabinet in sequence based on the welding sequence.

2. The POC gas cabinet side panel deformation repair method according to claim 1 is characterized in that: The deformation amount of the gas cabinet deformation area is measured including: Get the gas cabinet diameter, number of columns, and side panel thickness; The standard gas cabinet is evenly divided into a number of sector-shaped areas, and the center of each sector-shaped area is located on the axis of the gas cabinet, and the two ends of the arc are respectively located on the straight line where two adjacent columns are located; Measure the distance between the preset point on the arc of each sector area and the chord formed by two adjacent columns, and use it as the reference distance; Fix a ruler in the sector-shaped area where the deformed area of ​​the gas cabinet to be repaired is located, and fix the two ends of the ruler on the two pillars in the corresponding sector-shaped area respectively. Calculate the actual distance between the preset point on the side panel of the gas cabinet and the ruler, and compare it with the corresponding reference distance to determine the deformation value of each preset point; The deformation amount of the gas cabinet deformation area is determined based on the deformation values ​​of all preset points.

3. The POC gas cabinet side panel deformation repair method according to claim 1 is characterized in that: The repair material is a steel plate, and the material of the steel plate is the same as that of the gas cabinet side plate.

4. The method for repairing deformation of the POC gas cabinet side panel according to claim 2 is characterized in that: The prefabricated repair material comprises: The plates are cut based on the number of layers and shape of the repaired steel plates, and then polished and painted for anti-corrosion treatment.

5. The POC gas cabinet side panel deformation repair method according to claim 1 is characterized in that: The step of welding the repair material to the deformed area of ​​the gas cabinet in sequence based on the welding sequence includes: The repair materials are welded to the deformed area inside the side plate in sequence, and each piece of repair material is polished after welding until the thickness of the weld is less than or equal to the threshold.

6. The method for repairing deformation of the POC gas cabinet side panel according to claim 5 is characterized in that: The threshold value is 1 mm.

7. The POC gas cabinet side panel deformation repair method according to claim 1 is characterized in that: After the repair materials are sequentially welded to the deformed areas of the gas cabinet based on the welding sequence, the method further includes: Measure the welding part and grind it with a grinder when the patch thickness is greater than the reference value. When the patch thickness is less than the reference value, patch it according to the measured value until the gap between the rubber block in the sealing device and the side panel is less than or equal to 0.5mm.

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