Hanging shaft structure for reducing deformation of tank wall of oil tank

Abstract

The utility model relates to a hanger shaft structure for reducing the deformation of a tank wall of an oil tank, in particular to the technical field of hanger shaft structures of oil tanks of power transformers, which improves the connection mode of direct welding of a thick-wall pipe and the tank wall in a traditional structure by welding a fixing plate and the tank wall. The input of welding heat is reduced, the deformation amount of the box wall is further reduced, meanwhile, the thick-wall pipe or the round steel retracts into the inner surface of the fixing plate by 2-5 mm when the inner side of the fixing plate is welded, so that the surface, within the coverage range of the fixing plate, of the box wall has a free telescopic space in the welding process of the box wall, and dead bending deformation is reduced; according to the hanger shaft structure capable of reducing the deformation of the tank wall of the oil tank, the welding groove angle alpha and the welding groove angle beta are arranged at the bottom of the fixing plate, and in the welding process, by means of a layered welding mode, the qualified rate of welding is increased, the phenomenon of insufficient welding of a welding seam is avoided, and the stability of the connecting structure of the hanger shaft and the tank wall is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of a suspension shaft structure of an oil tank of a power transformer, and more specifically, to a suspension shaft structure capable of reducing deformation of an oil tank wall. Background Art

[0002] The oil tank wall material of large power transformers is Q355 and Q235 with thickness of 8, 10 and 12 mm. A hanging shaft for hanging the transformer is welded on the wall. The welding sequence of the existing hanging shaft structure and the wall is to first weld the internal cross support of the thick-walled tube, then weld the thick-walled tube or round steel to the wall, and finally weld all the welds of the fixing plate and reinforcing iron to complete the welding.

[0003] The existing hanging shaft welding method is mainly caused by the welding of thick-walled pipes or round steels with the box wall, which causes large welding deformation, large welding heat input and concentrated welding stress, resulting in large deformation of the box wall due to heat, and then serious deformation of the inner wall plane of the box wall, making the box body unqualified. At the same time, the correction work after deformation is difficult, the correction work time is long and the effect is not good. In addition, the existing hanging shaft is made of thick-walled pipes or round steels, and the lifting rope is prone to slipping during hoisting. Summary of the invention

[0004] The purpose of the utility model is to provide a suspension shaft structure which has a simple structure and a reasonable design and can reduce the deformation of the oil tank wall in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A suspension shaft structure for reducing deformation of a fuel tank wall comprises a fixing plate, a reinforcing iron, a cross support and a thick-walled tube, wherein the cross support is located inside the thick-walled tube, the thick-walled tube runs through the middle of the fixing plate, and the reinforcing iron is evenly distributed on the outside of the thick-walled tube;

[0007] The bottom of the thick-walled tube is indented into the inner side of the bottom of the fixed plate, and the distance between the two is t1. Two sets of continuous welding grooves are arranged at the edge of the bottom of the fixed plate, and the angles thereof are α and β;

[0008] A limit baffle mechanism (5) is arranged on the outer side of the cross support (3) and the thick-walled tube (4) away from one end of the fixed plate (1). The limit baffle mechanism (5) is used to prevent the lifting rope from slipping when lifting the oil tank. The limit baffle mechanism (5) at least includes a baffle (503). The baffle (503) is attached to the bottom of the edge of one end of the thick-walled tube (4). Articulated arms (501) are symmetrically hinged on both sides of one end of the baffle (503), and the baffle (503) and the middle part of the articulated arm (501) are hinged to each other.

[0009] As a further optimization scheme of the utility model, the distance t1 that the thick-walled tube is retracted into the inner side of the bottom of the fixed plate is 2-5mm, the thickness T of the fixed plate is 10mm-25mm, the distance from the starting point of angle α to the side edge of the fixed plate is t3, and t3 is 6mm-12mm, and the distance from the starting point of angle β to the side edge of the fixed plate is t2, and t2 is 4mm-6mm.

[0010] As a further optimization solution of the utility model, the welding groove angle α is 30°-45°, and the welding groove angle β is 60°-75°.

[0011] As a further optimization scheme of the utility model, one end of the two groups of articulated arms (501) extends to the inside of the thick-walled tube (4), and a limit block (504) is symmetrically arranged on one side of the articulated arm (501) close to the cross support (3), and one end of the cross support (3) is evenly provided with a through hole (6) that is compatible with the limit block (504), and the other end of the two groups of articulated arms (501) is provided with an oblong hole (506), and the inside of the two groups of oblong holes (506) is penetrated by an adjusting bolt (502), and two groups of adjusting nuts (505) are arranged on the outside of the adjusting bolt (502).

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

[0013] 1. The utility model improves the traditional connection mode of directly welding thick-walled pipes and box walls by welding the fixing plate to the box wall, reduces the input of welding heat, and thus reduces the deformation of the box wall. At the same time, when welding on the inner side of the fixing plate, the thick-walled pipe or round steel is retracted into the inner surface of the fixing plate by 2-5mm, so that during the welding process, the surface of the box wall within the coverage of the fixing plate has free expansion and contraction space, reducing dead bend deformation;

[0014] 2. The utility model provides welding groove angles α and β at the bottom of the fixed plate. In the welding process, the groove angle α is welded first and then the groove angle β is welded by layered welding, thereby improving the welding qualification rate, avoiding the phenomenon of weld virtual welding, and ensuring the stability of the connection structure between the hanging shaft and the box wall;

[0015] 3. The utility model sets a limit baffle mechanism, which is installed at the bottom of one end of the thick-walled pipe, so as to limit the lifting rope on the outside of the thick-walled pipe and prevent it from slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0017] Figure 2 It is a front sectional view of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of the structure of the welding groove in the utility model;

[0019] Figure 4 This is a schematic diagram of the welding assembly structure of the utility model;

[0020] Figure 5 It is an enlarged schematic diagram of the connection relationship between the limit baffle mechanism and the cross support in the utility model;

[0021] Figure 6 It is an enlarged schematic diagram of the structure of the limit baffle mechanism in the utility model.

[0022] In the figure: 1. fixing plate; 2. reinforcing iron; 3. cross support; 4. thick-walled tube; 5. limit baffle mechanism; 6. through hole; 501. articulated arm; 502. adjusting bolt; 503. stopper; 504. limit block; 505. adjusting nut; 506. oblong hole. DETAILED DESCRIPTION

[0023] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0024] Example 1

[0025] like Figure 1-6 As shown, a suspension shaft structure for reducing the deformation of the tank wall includes a fixing plate 1, a reinforcing iron 2, a cross support 3, and a thick-walled tube 4. The cross support 3 is located on the inner side of the thick-walled tube 4. The thick-walled tube 4 runs through the middle of the fixing plate 1. The reinforcing iron 2 is evenly distributed on the outer side of the thick-walled tube 4.

[0026] The bottom of the thick-walled tube 4 is indented into the inner side of the bottom of the fixed plate 1, and the distance between the two is t1. The distance t1 of the thick-walled tube 4 indented into the inner side of the bottom of the fixed plate 1 is 2-5mm. The thickness T of the fixed plate 1 is 10mm-25mm. Two sets of continuous welding grooves are arranged at the edge position of the bottom of the fixed plate 1, and the angles thereof are α and β. The welding groove angle α is 30°-45°, and the welding groove angle β is 60°-75°. The distance from the starting point of angle α to the side of the fixed plate 1 is t3, and t3 is 6mm-12mm. The distance from the starting point of angle β to the side of the fixed plate 1 is t2, and t2 is 4mm-6mm.

[0027] The limit baffle mechanism 5 includes a stopper 503, which is attached to the bottom of the edge of one end of 4. Articulated arms 501 are symmetrically hinged on both sides of one end of the stopper 503, and the stopper 503 and the middle of the articulated arm 501 are hinged to each other. One end of the two groups of articulated arms 501 extends to the inside of 4, and the limit blocks 504 are symmetrically arranged on the side of the articulated arm 501 close to 3. Through holes 6 that are compatible with the limit blocks 504 are evenly arranged at one end of 3. Long circular holes 506 are arranged at the other ends of the two groups of articulated arms 501. Adjustment bolts 502 are arranged through the inside of the two groups of long circular holes 506, and two groups of adjustment nuts 505 are arranged on the outside of the adjusting bolts 502.

[0028] It should be noted that, when processing the suspension shaft structure for reducing the deformation of the tank wall, two bevels are firstly processed at the edge of the bottom of the fixing plate 1, and the angles are α and β, and then a through hole is opened at the center of the top of the fixing plate 1, and the diameter of the through hole is the same as the outer diameter of the thick-walled tube 4, and then welding is performed;

[0029] The processing steps are as follows:

[0030] S1: First, the cross support 3 is welded to the inner side of the thick-walled tube 4. During welding, carbon dioxide gas is used as a shielding gas, and the inner side of the thick-walled tube 4 is supported by the cross structure of the cross support 3;

[0031] S2: Then, the thick-walled tube 4 is passed through the middle of the top of the fixed plate 1, so that the bottom of the thick-walled tube 4 is retracted 2-5 mm into the bottom of the inner side of the fixed plate 1, so that the box wall and the covering area of ​​the fixed plate 1 have free expansion and contraction space, reducing the occurrence of dead bend deformation, and then the outer side of the thick-walled tube 4 is welded to the top of the fixed plate 1, and carbon dioxide gas is used as a protective gas during welding;

[0032] S3: Secondly, the reinforcing iron 2 is evenly distributed according to the number of edges of the fixing plate 1, and the reinforcing iron 2 is welded to the intersection of the fixing plate 1 and the thick-walled tube 4 respectively. By pre-processing and welding the parts of the hanging shaft in advance, the heat input when directly welding with the box wall is reduced, thereby reducing the possibility of deformation of the inner side of the box wall. Carbon dioxide gas is used as a shielding gas during welding;

[0033] S4: Then, the suspension shaft structure is welded to the outer wall of the power transformer oil tank to be welded, and carbon dioxide gas is used as a shielding gas during welding. In the welding process, in the first step, the bottom surface of the reinforcing iron 2 is spot-welded to the outer wall of the power transformer oil tank, and in the second step, the groove angle α where the bottom of the fixing plate 1 fits the outer wall of the power transformer oil tank is fully welded and primed, and in the third step, the groove angle β where the bottom of the fixing plate 1 fits the outer wall of the power transformer oil tank is fully welded and filled, and in the fourth step, the outer side of the groove angle β is covered with a welding cap, and finally the edge of the bottom of the reinforcing iron 2 is welded to the outer wall of the power transformer oil tank, thereby completing the welding of the suspension shaft structure and the outer wall of the power transformer oil tank;

[0034] S5: Finally, before lifting, by assembling the limit baffle mechanism 5 and the through hole 6, by screwing the two sets of adjusting nuts 505 to move on the outside of the adjusting bolt 502, the ends of the two sets of articulated arms 501 are pushed away from each other, so that the ends of the articulated arms 501 inserted into the inner side of 4 are close to each other, and then the two sets of limit blocks 504 are driven to be inserted into the inside of the through hole 6 for positioning and engagement, so that the block 503 protrudes from the bottom of the outside of the thick-walled tube 4, thereby blocking the lifting rope on the outside of the thick-walled tube 4 to prevent it from slipping. At the same time, through the structural design of the oblong hole 506, the adjusting bolt 502 has space for lateral displacement, thereby ensuring the realization of the hinged structure.

[0035] It should be specifically noted that during the welding process, the weld leg height requirement for each weld is 12-15mm, and each weld needs to be welded 3-6 times.

[0036] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A suspension shaft structure for reducing deformation of a fuel tank wall, characterized in that: It comprises a fixing plate (1), a reinforcing iron (2), a cross support (3), and a thick-walled tube (4), wherein the cross support (3) is located on the inner side of the thick-walled tube (4), the thick-walled tube (4) passes through the middle of the fixing plate (1), and the reinforcing iron (2) is evenly distributed on the outer side of the thick-walled tube (4); The bottom of the thick-walled tube (4) is indented into the inner side of the bottom of the fixing plate (1), and the distance between the two is t1. Two sets of continuous welding grooves are arranged at the edge of the bottom of the fixing plate (1), and the angles thereof are α and β. A limit baffle mechanism (5) is arranged on the outer side of the cross support (3) and the thick-walled tube (4) away from one end of the fixed plate (1). The limit baffle mechanism (5) is used to prevent the lifting rope from slipping when lifting the oil tank. The limit baffle mechanism (5) at least includes a baffle (503). The baffle (503) is attached to the bottom of the edge of one end of the thick-walled tube (4). Articulated arms (501) are symmetrically hinged on both sides of one end of the baffle (503), and the baffle (503) and the middle part of the articulated arm (501) are hinged to each other.

2. The suspension shaft structure for reducing the deformation of the oil tank wall according to claim 1, characterized in that: The distance t1 by which the thick-walled tube (4) is retracted into the inner side of the bottom of the fixed plate (1) is 2-5 mm, the thickness T of the fixed plate (1) is 10 mm-25 mm, the distance from the starting point of the angle α to the side of the fixed plate (1) is t3, and t3 is 6 mm-12 mm, and the distance from the starting point of the angle β to the side of the fixed plate (1) is t2, and t2 is 4 mm-6 mm.

3. The suspension shaft structure for reducing the deformation of the oil tank wall according to claim 1, characterized in that: The welding groove angle α is 30°-45°, and the welding groove angle β is 60°-75°.

4. The suspension shaft structure for reducing the deformation of the oil tank wall according to claim 1, characterized in that: One end of the two groups of articulated arms (501) extends to the inside of the thick-walled tube (4), and a limit block (504) is symmetrically arranged on one side of the articulated arm (501) close to the cross support (3), and one end of the cross support (3) is evenly provided with through holes (6) that are compatible with the limit block (504), and the other ends of the two groups of articulated arms (501) are both provided with oblong holes (506), and adjusting bolts (502) are arranged inside the two groups of oblong holes (506), and two groups of adjusting nuts (505) are arranged on the outside of the adjusting bolts (502).

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