Gap adjusting method and device for transformer oil tank wall assembly welding

Abstract

The invention relates to the technical field of transformer oil tank manufacturing, in particular to a gap adjusting method and device for transformer oil tank wall assembling and welding. The technical problems that an existing transformer oil tank wall installing and welding gap adjusting method is complex in operation and low in efficiency, has potential safety hazards and is poor in welding quality are solved. According to the technical scheme, the gap adjusting method and device for transformer oil tank wall assembling and welding comprise a C-shaped clamp and a wedge matched with the C-shaped clamp; the method comprises the following steps: erecting a to-be-installed and welded transformer oil tank wall; at least one adjusting device consisting of a C-shaped hoop and a wedge is spot-welded at the gap position of the box wall; a tool is used for applying force to the wedge so that the wedge can move to adjust the gap between the box walls; welding and fixing the adjusted gap; therefore, the effects that the requirements for welding and operation space are small, operation is safe and reliable, and the risk that a heavy object falls and is injured by a crashing object is reduced are achieved. The operation method is simple, convenient, time-saving and labor-saving, and the labor efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer oil tank manufacturing, and in particular to a gap adjustment method and device for assembly welding of transformer oil tank wall. Background Art

[0002] The transformer oil tank (shell) is generally composed of four wall panels, which are processed by single-piece cutting and then welded together. Therefore, during manufacturing, the four wall panels of the oil tank need to be positioned and assembled according to the size required by the drawing, and then welded together seamlessly in this order. However, due to the large size and heavy weight of the transformer oil tank (length 5-12m, width 2-4m, weight 1-4 tons), in order to achieve "zero gap" and "zero deviation" between the wall panels when assembling them, 2-3 people need to work together with the cooperation of the crane to spot weld them first. The screw is held and adjusted by the screw. Due to the limited stroke of the screw, it often exceeds or fails to reach the inner diameter of the oil tank. Therefore, a jack is needed to adjust the distance and gap between the tank walls by adjusting the stroke of the screw or jack. However, when processing each oil tank, several screws are needed to achieve the purpose of adjustment. In addition, during operation, the jack and the screw are easy to fall off the oil tank under the action of their own gravity because the oil tank is high and the tank wall has a certain flexibility. There is a risk of hitting or injuring people.

[0003] Therefore, in order to solve the above problems, a gap adjustment method and device for transformer oil tank wall assembly welding are proposed, which can achieve adjustment between the tank walls through simple operation, reduce the input of manpower and physical strength, and avoid the risk of personal injury. Summary of the invention

[0004] In order to overcome the existing method of adjusting the gap between the welding assemblies of the transformer oil tank wall, due to the large size and heavy weight of the transformer oil tank, it becomes extremely difficult to accurately adjust the gap between the tank walls; the traditional method requires reliance on the cooperation of the trolley, resulting in low efficiency; thus, there are problems such as complex operation, low efficiency, safety hazards and poor welding quality.

[0005] The technical solution of the present invention is: a gap adjustment method for assembly welding of a transformer oil tank wall, the method comprising the following steps:

[0006] S1: Stand up the transformer oil tank wall to be welded;

[0007] S2: spot weld at least one adjustment device consisting of a C-type clamp and a wedge at the gap position of the box wall;

[0008] S3: Use a tool to apply force to the wedge to move it to adjust the gap between the box walls;

[0009] S4: The adjusted gap is fixed by welding.

[0010] Preferably, the slot structure of the C-shaped clamp is C-shaped, and the relative surfaces in the slot structure are parallel to each other so as to maintain a stable shape during the process of applying force.

[0011] Preferably, the wedge is a movable component, and the shape and size structure of the wedge are used to slide in the C-shaped clamp and adjust the gap.

[0012] Preferably, the number of the adjustment device spot-welded in step S2, i.e., a combination of a C-type clamp and a wedge, is determined according to the specific length of the box wall and the actual situation of the gap, and is generally 1-2; the optimal number and position of the installation adjustment device are determined specifically by evaluating the size of the box wall, the size of the gap, and the required adjustment force.

[0013] Preferably, the tool used in step S3 is a hammer, the weight of which is sufficient to make the wedge move as required, but not too heavy to cause loss of control or damage to the adjustment device, and the wedge is moved by striking one end of the wedge; the specific steps are as follows:

[0014] S301: before striking the wedge, determine the exact striking position, the striking position is selected at one end of the wedge, that is, the opposite side of the direction in which the wedge is expected to move, to ensure that the wedge can move in the expected direction;

[0015] S302: When using a hammer to strike the wedge, you should maintain a stable posture and control the force and frequency of the strikes; the striking frequency can be flexibly adjusted according to the needs of gap adjustment;

[0016] S303: During the knocking process, observe the adjustment effect of the gap, and gradually make the gap between the box walls reach the desired size and shape through continuous knocking and adjustment; during the adjustment process, stop knocking at an appropriate time and use a measuring tool to check the size of the gap to ensure the accuracy of the adjustment.

[0017] Preferably, before step S3, a step of pre-installing the C-shaped clamp and the wedge is also included to ensure their correct position and stability; the specific steps are as follows:

[0018] S601: Prepare tools and materials, including C-clamps, wedges, spot welding equipment, and measuring tools;

[0019] S602: Place the C-type clamp at the gap of the box wall to be adjusted, ensure that its slot structure is aligned with the gap, and that both sides of the C-type clamp fit tightly against the box wall. Use a measuring tool to check the position and angle of the C-type clamp to ensure that they are correct.

[0020] S603: Insert the wedge into the slot of the C-type clamp. The position of the wedge should be determined according to the size of the gap and the direction to be adjusted. When installing the wedge, use a tapping or gentle push method to ensure that the wedge is firmly located in the C-type clamp;

[0021] S604: After pre-installation, check the stability of the C-clamps and wedges by gently shaking or trying to move them to ensure that they will not fall off or move easily due to external forces;

[0022] S605: After confirming that the C-clamp and the wedge are correctly and stably installed, you can prepare for the formal adjustment in step S3.

[0023] Preferably, the welding in step S4 is seamless welding to ensure the sealing and structural strength of the fuel tank; the specific steps are as follows:

[0024] S401: After confirming that the gap between the box walls has been adjusted to a satisfactory state by using the C-type clamp and the wedge, carry out the preparation work before welding, including cleaning the weld area, removing oil, rust and other impurities, and at the same time, checking whether the welding equipment is in good condition and preparing the appropriate welding rod or wire;

[0025] S402: setting welding parameters including welding current, voltage and welding speed according to the material and thickness of the transformer oil tank and the requirements of the welding process;

[0026] S403: Ignite the welding gun or welding rod at the starting position of the weld and start seamless welding along the weld. During the welding process, keep the welding gun or welding rod moving steadily to ensure the uniformity and continuity of the weld.

[0027] S404: After welding is completed, conduct a preliminary inspection of the weld to observe whether there are cracks, slag inclusions, and unfused defects. If any problems are found, repair or re-weld immediately;

[0028] S405: Post-process the welds as needed, including grinding and polishing, to improve the appearance and performance of the welds; at the same time, perform anti-corrosion treatment on the weld area to extend the service life of the transformer tank.

[0029] Preferably, the method further comprises the step of inspecting the weld after welding is completed to ensure the welding quality, including appearance inspection, dimension measurement, non-destructive testing and mechanical property testing of the weld; specifically comprising:

[0030] S801: Weld appearance inspection: First, perform an appearance inspection on the completed welds to check whether they are smooth and uniform, and whether there are obvious cracks, pores, or slag inclusions. For welds that do not meet the appearance quality requirements, record and mark them;

[0031] S802: Weld size measurement: Use measuring tools, including calipers and vernier calipers, to measure the size of the weld, including the width, height and excess height of the weld, and compare the measurement results with the drawing requirements or relevant standards to ensure that the weld size meets the requirements;

[0032] S803: Nondestructive testing: Use ultrasonic nondestructive testing methods to test the internal quality of the weld to reveal cracks, slag inclusions, and unfused defects inside the weld to ensure the internal quality of the weld;

[0033] S804: Mechanical properties test: including tensile test, bending test, impact test, to evaluate the mechanical properties of welds such as strength, toughness and plasticity;

[0034] S805: Keep detailed records of weld inspection results, including inspection date, inspector, inspection method, inspection results and any problems.

[0035] A gap adjustment device for welding the wall of a transformer oil tank is used to implement the gap adjustment method for welding the wall of a transformer oil tank, comprising a C-shaped clamp and a wedge matched therewith, wherein the C-shaped clamp is used to be fixed at the gap of the tank wall, and the wedge is used to move in the C-shaped clamp to adjust the gap.

[0036] Preferably, the C-shaped clamp and the wedge are both made of ordinary carbon steel.

[0037] Beneficial effects of the present invention:

[0038] 1. The method comprises the following steps: erecting the wall of the transformer oil tank to be welded; spot welding at least one adjustment device consisting of a C-shaped clamp and a wedge at the gap position of the wall; applying force to the wedge using a tool to move it to adjust the gap between the walls; and welding and fixing the adjusted gap; thereby achieving the effect of requiring less space for welding and operation, safe and reliable operation, and reducing the risk of injury from falling heavy objects; the operation method of the invention is simple, convenient, time-saving and labor-saving, and greatly improves labor efficiency;

[0039] 2. The device is made of ordinary carbon steel, which is common, easy to find and has low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Shown is a three-dimensional structural schematic diagram of a gap adjustment device for assembly welding of a transformer oil tank wall according to the present invention;

[0041] Figure 2 Shown is a schematic flow chart of the steps of the gap adjustment method for assembly welding of the transformer oil tank wall of the present invention;

[0042] Explanation of the accompanying drawings: 1. C-type clamp; 2. wedge. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] See also Figure 1-2 The present invention provides an embodiment: a gap adjustment method for welding a transformer oil tank wall, the method comprising the following steps:

[0045] S1: Stand up the transformer oil tank wall to be welded;

[0046] S2: spot weld at least one adjustment device consisting of a C-type clamp and a wedge at the gap position of the box wall;

[0047] S3: Use a tool to apply force to the wedge to move it to adjust the gap between the box walls;

[0048] S4: The adjusted gap is fixed by welding.

[0049] Preferably, the slot structure of the C-shaped clamp is C-shaped, and the relative surfaces in the slot structure are parallel to each other so as to maintain a stable shape during the process of applying force.

[0050] Preferably, the wedge is a movable component, and the shape and size structure of the wedge are used to slide in the C-shaped clamp and adjust the gap.

[0051] Preferably, the number of the adjustment device spot-welded in step S2, i.e., a combination of a C-type clamp and a wedge, is determined according to the specific length of the box wall and the actual situation of the gap, and is generally 1-2; the optimal number and position of the installation adjustment device are determined specifically by evaluating the size of the box wall, the size of the gap, and the required adjustment force.

[0052] Preferably, the tool used in step S3 is a hammer, the weight of which is sufficient to make the wedge move as required, but not too heavy to cause loss of control or damage to the adjustment device, and the wedge is moved by striking one end of the wedge; the specific steps are as follows:

[0053] S301: before striking the wedge, determine the exact striking position, the striking position is selected at one end of the wedge, that is, the opposite side of the direction in which the wedge is expected to move, to ensure that the wedge can move in the expected direction;

[0054] S302: When using a hammer to strike the wedge, you should maintain a stable posture and control the force and frequency of the strikes; the striking frequency can be flexibly adjusted according to the needs of gap adjustment;

[0055] S303: During the knocking process, observe the adjustment effect of the gap, and gradually make the gap between the box walls reach the desired size and shape through continuous knocking and adjustment; during the adjustment process, stop knocking at an appropriate time and use a measuring tool to check the size of the gap to ensure the accuracy of the adjustment.

[0056] Preferably, before step S3, a step of pre-installing the C-shaped clamp and the wedge is also included to ensure their correct position and stability; the specific steps are as follows:

[0057] S601: Prepare tools and materials, including C-clamps, wedges, spot welding equipment, and measuring tools;

[0058] S602: Place the C-type clamp at the gap of the box wall to be adjusted, ensure that its slot structure is aligned with the gap, and that both sides of the C-type clamp fit tightly against the box wall. Use a measuring tool to check the position and angle of the C-type clamp to ensure that they are correct.

[0059] S603: Insert the wedge into the slot of the C-type clamp. The position of the wedge should be determined according to the size of the gap and the direction to be adjusted. When installing the wedge, use a tapping or gentle push method to ensure that the wedge is firmly located in the C-type clamp;

[0060] S604: After pre-installation, check the stability of the C-clamps and wedges by gently shaking or trying to move them to ensure that they will not fall off or move easily due to external forces;

[0061] S605: After confirming that the C-clamp and the wedge are correctly and stably installed, you can prepare for the formal adjustment in step S3.

[0062] Preferably, the welding in step S4 is seamless welding to ensure the sealing and structural strength of the fuel tank; the specific steps are as follows:

[0063] S401: After confirming that the gap between the box walls has been adjusted to a satisfactory state by using the C-type clamp and the wedge, carry out the preparation work before welding, including cleaning the weld area, removing oil, rust and other impurities, and at the same time, checking whether the welding equipment is in good condition and preparing the appropriate welding rod or wire;

[0064] S402: setting welding parameters including welding current, voltage and welding speed according to the material and thickness of the transformer oil tank and the requirements of the welding process;

[0065] S403: Ignite the welding gun or welding rod at the starting position of the weld and start seamless welding along the weld. During the welding process, keep the welding gun or welding rod moving steadily to ensure the uniformity and continuity of the weld.

[0066] S404: After welding is completed, conduct a preliminary inspection of the weld to observe whether there are cracks, slag inclusions, and unfused defects. If any problems are found, repair or re-weld immediately;

[0067] S405: Post-process the welds as needed, including grinding and polishing, to improve the appearance and performance of the welds; at the same time, perform anti-corrosion treatment on the weld area to extend the service life of the transformer tank.

[0068] Preferably, the method further comprises the step of inspecting the weld after welding is completed to ensure the welding quality, including appearance inspection, dimension measurement, non-destructive testing and mechanical property testing of the weld; specifically comprising:

[0069] S801: Weld appearance inspection: First, perform an appearance inspection on the completed welds to check whether they are smooth and uniform, and whether there are obvious cracks, pores, or slag inclusions. For welds that do not meet the appearance quality requirements, record and mark them;

[0070] S802: Weld size measurement: Use measuring tools, including calipers and vernier calipers, to measure the size of the weld, including the width, height and excess height of the weld, and compare the measurement results with the drawing requirements or relevant standards to ensure that the weld size meets the requirements;

[0071] S803: Nondestructive testing: Use ultrasonic nondestructive testing methods to test the internal quality of the weld to reveal cracks, slag inclusions, and unfused defects inside the weld to ensure the internal quality of the weld;

[0072] S804: Mechanical properties test: including tensile test, bending test, impact test, to evaluate the mechanical properties of welds such as strength, toughness and plasticity;

[0073] S805: Keep detailed records of weld inspection results, including inspection date, inspector, inspection method, inspection results and any problems.

[0074] A gap adjustment device for welding the wall of a transformer oil tank, used for implementing the gap adjustment method for welding the wall of a transformer oil tank, comprises a C-shaped clamp 1 and a wedge 2 matched therewith, wherein the C-shaped clamp 1 is used for fixing at the gap of the tank wall, and the wedge 2 is used for moving in the C-shaped clamp 1 to adjust the gap.

[0075] Preferably, the C-shaped clamp 1 and the wedge 2 are both made of ordinary carbon steel.

[0076] Example

[0077] Optionally, it is assumed that a transformer manufacturing plant needs to produce a batch of transformer oil tanks with a length of 8m, a width of 3m, and a weight of about 2.5 tons; due to the large size and heavy weight of the oil tanks, the traditional gap adjustment method (such as using a lead screw and a jack) has the problems of complex operation, low efficiency, and potential safety hazards; therefore, the plant decides to use the gap adjustment method and device for assembly welding of the transformer oil tank wall of the present invention to adjust the gap; the implementation process is as follows:

[0078] A1: Preparation stage:

[0079] Stand up the wall of the transformer oil tank to be welded and ensure that the wall is stable and will not fall over;

[0080] Prepare a C-type clamp (made of ordinary carbon steel, with a C-shaped slot structure and opposite surfaces in the slot parallel to each other) and a wedge (also made of ordinary carbon steel, with a shape and size suitable for sliding in the C-type clamp);

[0081] Prepare spot welding equipment, measuring tools (such as calipers, vernier calipers), and hammers;

[0082] A2: Install the adjustment device:

[0083] According to the actual length of the box wall and the actual situation of the gap, it is decided to spot weld two adjustment devices consisting of C-type clamps and wedges at the gap position of the box wall;

[0084] Place the C-type clamp at the gap in the box wall to be adjusted, making sure that its slot structure is aligned with the gap and that both sides of the C-type clamp fit tightly against the box wall; use a measuring tool to check the position and angle of the C-type clamp to ensure that they are correct;

[0085] Insert the wedge into the slot of the C-type clamp and determine the position of the wedge according to the size of the gap and the direction to be adjusted; when installing the wedge, use a tapping or gentle push method to ensure that the wedge is firmly located in the C-type clamp;

[0086] Check the stability of the C-clamps and wedges by gently shaking or trying to move them to make sure they will not fall off or move easily due to external forces;

[0087] A3: Adjust the gap:

[0088] Use a hammer to hit the wedge to move it to adjust the gap between the box walls; the hitting position is selected at one end of the wedge, that is, the opposite side of the direction in which you want the wedge to move;

[0089] Control the force and frequency of the knocking, and make flexible adjustments according to the needs of gap adjustment; during the knocking process, observe the adjustment effect of the gap, and gradually make the gap between the box walls reach the required size and shape through continuous knocking and adjustment;

[0090] During the adjustment process, stop tapping at the right time and use a measuring tool to check the size of the gap to ensure the accuracy of the adjustment;

[0091] A4: Welding fixation:

[0092] After confirming that the gap between the box walls has been adjusted to a satisfactory state by using the C-type clamp and the wedge, carry out the preparation work before welding; including cleaning the weld area, removing oil, rust and other impurities; checking whether the welding equipment is in good condition; preparing suitable welding rods or welding wires;

[0093] Set welding parameters (such as welding current, voltage, and welding speed) according to the material and thickness of the transformer tank and the requirements of the welding process;

[0094] Light the welding gun or welding rod at the starting position of the weld and start seamless welding along the weld; during the welding process, keep the welding gun or welding rod moving steadily to ensure the uniformity and continuity of the weld;

[0095] After welding is completed, conduct a preliminary inspection of the weld to observe whether there are cracks, slag inclusions, and unfused defects; if any problems are found, repair or re-weld immediately;

[0096] Post-process the welds as needed, including grinding and polishing, to improve the appearance and performance of the welds; at the same time, perform anti-corrosion treatment on the weld area to extend the service life of the transformer tank;

[0097] A5: Weld inspection:

[0098] Carry out visual inspection on the completed welds to check whether they are smooth and uniform, and whether there are obvious cracks, pores, or slag inclusions; record and mark welds that do not meet the appearance quality requirements;

[0099] Use measuring tools to measure the size of the weld, including the width, height and excess height of the weld; compare the measurement results with the drawing requirements or relevant standards to ensure that the weld size meets the requirements;

[0100] Conduct internal quality inspection of welds by ultrasonic nondestructive testing to reveal cracks, slag inclusions, and unfused defects inside welds to ensure the internal quality of welds;

[0101] Conduct mechanical property tests, including tensile test, bending test, impact test, to evaluate the mechanical properties of welds such as strength, toughness and plasticity;

[0102] Keep detailed records of weld inspection results, including inspection date, inspector, inspection method, inspection results and existing problems;

[0103] The implementation effects are as follows:

[0104] 1. The method and device of the present invention are used to adjust the gap, which is easy to operate, saves time and effort; compared with the traditional method, it reduces the input of manpower and physical strength, and improves labor efficiency;

[0105] 2. Since the method and device of the present invention require little space for welding and operation, and avoid the use of tools that are easy to fall, such as screws and jacks, the safety of operation is greatly improved, and the risk of injury caused by falling heavy objects is reduced;

[0106] 3. Through the coordination and adjustment of the C-type clamp and the wedge, the gap between the box walls can be accurately adjusted. During the adjustment process, you can stop knocking at the right time and use measuring tools to check the size of the gap to ensure the accuracy of the adjustment;

[0107] 4. The adjusted gap is seamlessly welded, with high weld quality, good sealing and high structural strength; after weld inspection, all welds meet the requirements of the drawings and relevant standards;

[0108] Therefore, through the above embodiment, compared with the prior art, this embodiment achieves the following effects:

[0109] 1. The traditional method needs to rely on the cooperation of the aerial vehicle and is operated by 2-3 people, which is complicated and inefficient; the method and device of the present invention only requires one person to operate, which greatly simplifies the operation process;

[0110] 2. The traditional method uses a lead screw and a jack for adjustment, which has the risk of falling and poses a safety hazard to the operator; the method and device of the present invention avoids these risks and improves the safety of operation;

[0111] 3. Due to the complicated operation and tool limitation, the traditional method is difficult to achieve accurate adjustment of the gap, thus affecting the welding quality; the method and device of the present invention can achieve accurate adjustment of the gap and improve the welding quality through the coordination and adjustment of the C-type clamp and the wedge;

[0112] In summary, the gap adjustment method and device for transformer oil tank wall assembly welding of the present invention have achieved remarkable effects and advantages in practical applications; the method is easy to operate, safe and reliable, has high adjustment accuracy and good welding quality.

[0113] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A gap adjustment method for welding of transformer oil tank wall, characterized in that: The method comprises the following steps: S1: Stand up the transformer oil tank wall to be welded; S2: spot weld at least one adjustment device consisting of a C-type clamp and a wedge at the gap position of the box wall; S3: Use a tool to apply force to the wedge to move it to adjust the gap between the box walls; S4: The adjusted gap is fixed by welding.

2. A gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: The clamping groove structure of the C-shaped clamp is C-shaped, and the relative surfaces in the clamping groove structure are parallel to each other so as to keep the shape stable during the force application process.

3. A gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: The wedge is a movable component, and the shape and size structure of the wedge are used to slide in the C-shaped clamp and adjust the gap.

4. A gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: The adjustment device for spot welding in step S2 is a combination of a C-shaped clamp and a wedge.

5. The gap adjustment method for assembly welding of a transformer oil tank wall according to claim 1 is characterized in that: The tool used in step S3 is a hammer, the weight of which is sufficient to make the wedge move as required, but not too heavy to cause loss of control or damage to the adjustment device, and the wedge is moved by striking one end of the wedge; the specific steps are as follows: S301: before striking the wedge, determine the exact striking position, the striking position is selected at one end of the wedge, that is, the opposite side of the direction in which the wedge is expected to move, to ensure that the wedge can move in the expected direction; S302: When using a hammer to strike the wedge, you should maintain a stable posture and control the force and frequency of the strikes; the striking frequency can be flexibly adjusted according to the needs of gap adjustment; S303: During the knocking process, observe the adjustment effect of the gap, and gradually make the gap between the box walls reach the desired size and shape through continuous knocking and adjustment; during the adjustment process, stop knocking at an appropriate time and use a measuring tool to check the size of the gap to ensure the accuracy of the adjustment.

6. A gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: Before step S3, the method further includes pre-installing the C-shaped clamp and the wedge to ensure their correct position and stability. The specific steps are as follows: S601: Prepare tools and materials, including C-clamps, wedges, spot welding equipment, and measuring tools; S602: Place the C-type clamp at the gap of the box wall to be adjusted, ensure that its slot structure is aligned with the gap, and that both sides of the C-type clamp fit tightly against the box wall. Use a measuring tool to check the position and angle of the C-type clamp to ensure that they are correct. S603: Insert the wedge into the slot of the C-type clamp. The position of the wedge should be determined according to the size of the gap and the direction to be adjusted. When installing the wedge, use a tapping or gentle push method to ensure that the wedge is firmly located in the C-type clamp; S604: After pre-installation, check the stability of the C-clamps and wedges by gently shaking or trying to move them to ensure that they will not fall off or move easily due to external forces; S605: After confirming that the C-clamp and the wedge are correctly and stably installed, you can prepare for the formal adjustment in step S3.

7. A gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: The welding in step S4 is seamless welding to ensure the sealing and structural strength of the fuel tank; the specific steps are as follows: S401: After confirming that the gap between the box walls has been adjusted to a satisfactory state by using the C-type clamp and the wedge, carry out the preparation work before welding, including cleaning the weld area, removing oil, rust and other impurities, and at the same time, checking whether the welding equipment is in good condition and preparing the appropriate welding rod or wire; S402: setting welding parameters including welding current, voltage and welding speed according to the material and thickness of the transformer oil tank and the requirements of the welding process; S403: Ignite the welding gun or welding rod at the starting position of the weld and start seamless welding along the weld. During the welding process, keep the welding gun or welding rod moving steadily to ensure the uniformity and continuity of the weld. S404: After welding is completed, conduct a preliminary inspection of the weld to observe whether there are cracks, slag inclusions, and unfused defects. If any problems are found, repair or re-weld immediately; S405: Post-process the welds as needed, including grinding and polishing, to improve the appearance and performance of the welds; at the same time, perform anti-corrosion treatment on the weld area to extend the service life of the transformer tank.

8. The gap adjustment method for welding the wall of a transformer oil tank according to claim 1, characterized in that: The method also includes the step of inspecting the weld after welding is completed to ensure the welding quality, including visual inspection, dimensional measurement, non-destructive testing and mechanical property testing of the weld; specifically including: S801: Weld appearance inspection: First, perform an appearance inspection on the completed welds to check whether the welds are smooth and uniform, and whether there are obvious cracks, pores, and slag inclusions. For welds that do not meet the appearance quality requirements, record and mark them; S802: Weld size measurement: Use measuring tools, including calipers and vernier calipers, to measure the size of the weld, including the width, height and excess height of the weld, and compare the measurement results with the drawing requirements or relevant standards to ensure that the weld size meets the requirements; S803: Nondestructive testing: Use ultrasonic nondestructive testing methods to test the internal quality of the weld to reveal cracks, slag inclusions, and unfused defects inside the weld to ensure the internal quality of the weld; S804: Mechanical properties test: including tensile test, bending test, impact test, to evaluate the mechanical properties of welds such as strength, toughness and plasticity; S805: Keep detailed records of weld inspection results, including inspection date, inspector, inspection method, inspection results and any problems.

9. A gap adjustment device for welding the wall of a transformer oil tank, used to implement the method of claim 1, characterized in that: It comprises a C-shaped clamp (1) and a wedge (2) matched therewith, wherein the C-shaped clamp (1) is used to be fixed at the gap of the box wall, and the wedge (2) is used to move inside the C-shaped clamp (1) to adjust the gap.

10. A gap adjustment device for welding the wall of a transformer oil tank according to claim 9, characterized in that: The C-shaped clamp (1) and the wedge (2) are both made of ordinary carbon steel.

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