Equidistant spot welding device for machining end socket

Abstract

The invention relates to the technical field of welding, in particular to an isometric spot welding device for end socket machining, which comprises a bottom scalloped segment, a middle scalloped segment and a top scalloped segment which form a heavy end socket from bottom to top, the bottom scalloped segment is positioned on the ground, and lifting lugs are fixedly mounted on the bottom scalloped segment, the middle scalloped segment and the top scalloped segment; a hemispherical support is arranged at the bottom of the top scalloped segment and comprises a bottom ring making contact with the bottom of the bottom scalloped segment, a hemispherical cover fixedly connected to the bottom ring, a plurality of welding grooves formed in the hemispherical cover and distributed in an annular array, and a baffle ring fixedly installed on the bottom ring. The inner sides of the bottom scalloped segment, the middle scalloped segment and the top scalloped segment are matched with the radian of the outer wall of the semispherical cover, a seam where the bottom scalloped segment, the middle scalloped segment and the top scalloped segment are directly attached coincides with the welding groove, and steel cables are arranged outside the bottom scalloped segment, the middle scalloped segment and the top scalloped segment; and a contraction assembly for driving the steel rope to contract is arranged outside the bottom ring.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to an equidistant spot welding device for head processing. Background Art

[0002] Pressure vessels are widely used in chemical, petroleum, machinery, metallurgy, nuclear energy, aviation and aerospace fields. They are essential core equipment in the production process. With the large-scale development of chemical equipment and power plants, the diameter of pressure vessels is getting larger and larger, such as 5-25m, and the head on the top of the pressure vessel is the main pressure-bearing component in the pressure vessel. In the traditional manufacturing process, when manufacturing large-diameter heavy heads, it is limited by factors such as the tonnage of the press and the press spacing. It is difficult to press the flat plates into shape in one go after splicing them together. Therefore, a manufacturing solution is usually adopted in which multiple melon slices are pressed and then spliced with longitudinal seams. In the process of welding multiple longitudinal seams, due to the different gaps between each weld, different operating techniques of the welders, different temperatures between welding layers, etc., it is easy to cause inconsistent shrinkage deformation of each weld. Therefore, at the beginning, the melon slices need to be spot-welded (positioned welded) at equal distances;

[0003] Typically, spot welds (tack welds) are short welds made using the same process as final welding. They hold assembled components in place and ensure they are correctly positioned relative to each other. They control and resist deformation during welding and ensure the weld has the mechanical strength to withstand its own weight when lifted, moved, manipulated, or turned over.

[0004] In the prior art, after the bottom of the bottom melon slice is clamped, a rod is used to support the top of the bottom melon slice. After the bottom melon slice is welded, the middle melon slice is suspended by a gantry, and then the middle melon slices are welded to each other and to the bottom melon slice at the same time. Finally, the top melon slice is suspended on the top of the middle melon slice for welding. There are two main problems. First, when arranging the middle melon slice and the bottom melon slice, the position needs to be constantly adjusted and then welded. Second, the support positioning and clamping of the bottom melon slice and the middle melon slice are not stable enough, which poses a safety risk.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to design a new device and method for detecting glass scratches, which can detect scratches on the glass surface without the need for multi-angle lighting, so as to solve the above-mentioned shortcomings in the technology.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an equidistant spot welding device for head processing, comprising a bottom melon flap, a middle melon flap and a top melon flap which form a heavy-duty head from bottom to top, the bottom melon flap being located on the ground, the bottom melon flap, the middle melon flap and the top melon flap being fixedly mounted with lifting ears, a hemispherical bracket being provided at the bottom of the top melon flap, the hemispherical bracket comprising a bottom ring in contact with the bottom of the bottom melon flap, a hemispherical cover fixedly connected to the bottom ring, a plurality of welding grooves distributed in an annular array on the hemispherical cover, and a retaining ring fixedly mounted on the bottom ring, the inner sides of the bottom melon flap, the middle melon flap and the top melon flap being matched with the curvature of the outer wall of the hemispherical cover, the gap between the bottom melon flap, the middle melon flap and the top melon flap being directly fitted coincides with the welding groove, the bottom melon flap, the middle melon flap and the top melon flap are provided with steel cables on the outside, and a contraction component for driving the steel cables to contract is provided on the outside of the bottom ring;

[0008] By tightening the steel cable and matching the lifting lugs, the bottom melon segment is pressed against the hemispherical cover and spot welded vertically to each other. After the middle melon segment is hoisted onto the bottom melon segment, the steel cable and the lifting lugs are used to press it against the hemispherical cover and spot weld it. Finally, the top melon segment is hoisted to the top support of the hemispherical cover and spot welded to the middle melon segment.

[0009] Preferably, the welding groove includes a first groove and a second groove distributed in a ring array, a plurality of first rods and second rods are fixedly connected in the first groove and the second groove, and the width of the first groove and the second groove gradually increases from top to bottom.

[0010] Preferably, the height of the first groove is greater than that of the second groove, the number of the second rods is N, and the number of the first rods is N+1.

[0011] Preferably, the top surfaces and bottom surfaces of the first rod, the second rod and the middle melon slice are not located on the same horizontal plane.

[0012] Preferably, the sides of the middle melon slice and the bottom melon slice are on the same plane.

[0013] Preferably, the side edges of the middle melon segment and the bottom melon segment are in contact with the first groove.

[0014] Preferably, the retraction assembly includes a movable lifting platform, a shell fixedly installed on the top of the lifting platform, a hydraulic assembly fixedly installed in the shell, a clamp fixedly installed at the output end of the hydraulic assembly, and a roller rotatably installed on the shell. The steel cable is slidably connected to the roller, the clamp can clamp the steel cable, and the top of the shell away from the hydraulic device forms a platform.

[0015] Preferably, there are two lifting ears on the bottom melon segment and the middle melon segment, and the two lifting ears are not located on the same horizontal plane. The number of the steel cables and the contraction components is set to two, and there are multiple lifting ears fixedly installed on the top melon segment and distributed in a circular array.

[0016] Preferably, a step is provided in the ground at the bottom of the heavy-duty head, and the step leads to the interior of the hemispherical cover.

[0017] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0018] 1. The present invention uses the cooperation between the hemispherical bracket and the contraction assembly to quickly compress the bottom melon segments with steel cables and then spot weld them one by one on the hemispherical cover. Compared with the support, positioning and clamping of the bottom melon segments in the prior art, the safety is improved and they will not collapse inwards.

[0019] 2. After spot welding the bottom melon slice, the steel cable that presses the bottom melon slice can be used to press the middle melon slice onto the hemispherical cover and the bottom melon slice again. There is no need to constantly adjust the position. Instead, the position can be fixed on the hemispherical cover first and then concentrated welding can be carried out, which can improve efficiency and accuracy.

[0020] 3. At the same time, after the spot welding is completed, the present invention can directly carry out full welding. It only needs to suspend the heavy head and rotate it to a certain angle when the part blocked by the hemispherical cover is not welded, so that the unwelded part is exposed in the second groove for welding, thus realizing the combination of spot welding device and full welding device.

[0021] 4. Compared with the structure used in the prior art for clamping and positioning the bottom melon segments, the retraction assembly of the present invention is not only convenient and quick to operate, but can also be used in conjunction with the hemispherical cover to achieve stable positioning. It can be applied to heavy heads with different diameters by simply using steel cables of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the present invention;

[0025] Figure 3 A perspective view of the present invention;

[0026] Figure 4 It is a schematic diagram of the splitting of the present invention;

[0027] Figure 5 A three-dimensional diagram of a hemispherical bracket according to the present invention;

[0028] Figure 6 This is a schematic diagram of the bottom structure of the hemispherical cover of the present invention;

[0029] Figure 7 It is a schematic diagram of the steel cable contraction of the present invention.

[0030] Description of reference numerals:

[0031] 1. Heavy-duty head; 2. Bottom melon segment; 3. Middle melon segment; 4. Top melon segment; 5. Lifting lug; 6. Hemispherical bracket; 6a. Bottom ring; 6b. Hemispherical cover; 6c. Welding groove; 6c1. First groove; 6c2. Second groove; 6c3. First rod; 6c4. Second rod; 6d. Retaining ring; 7. Steel cable; 8. Retraction assembly; 8a. Lifting platform; 8b. Shell; 8c. Hydraulic assembly; 8d. Gripper; 8e. Roller; 9. Ladder. DETAILED DESCRIPTION

[0032] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0033] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] The present invention provides Figure 1-7The equidistant spot welding device for head processing shown in the figure includes a bottom melon slice 2, a middle melon slice 3 and a top melon slice 4 that form a heavy-duty head 1 from bottom to top. The bottom melon slice 2 and the middle melon slice 3 are designed to be in the same plane on both sides, and their width gradually increases from top to bottom. At the same time, a plurality of lifting ears 5 distributed in a circular array are welded on the top melon slice 4, and two lifting ears 5, one above and one below, are welded on the bottom melon slice 2 and the middle melon slice 3. The lifting ears 5 on the bottom melon slice 2, the middle melon slice 3 and the top melon slice 4 are convenient for the heavy-duty gantry in the prior art to lift them to the desired position through the lifting ears 5. We have set a hemispherical bracket 6 on the ground. The outer wall shape of the hemispherical bracket 6 is matched with the bottom melon slice 2, the middle melon slice 3 and the top melon slice 4. The hemispherical shape here is just an adjective for easy understanding. The specific shape is changed mainly based on the shape of the heavy-duty head 1. The hemispherical bracket 6 includes The bottom ring 6a contacting the bottom of the melon slice 2, the hemispherical cover 6b fixedly connected to the bottom ring 6a, the multiple welding grooves 6c distributed in a ring array on the hemispherical cover 6b, and the retaining ring 6d fixedly installed on the bottom ring 6a, the inner diameter of the retaining ring 6d is larger than the diameter of the bottom of the circle formed by the multiple bottom melon slices 2, and the width of the welding groove 6c gradually increases from top to bottom, so that the width of the rod between the two welding grooves 6c can be consistent, and the gap where the bottom melon slice 2, the middle melon slice 3 and the top melon slice 4 are directly fitted coincides with the welding groove 6c, so that the connection between the bottom melon slices 2 will be mostly exposed in the welding groove 6c, and the connection between the middle melon slices 3 will also be mostly exposed in the welding groove 6c. At the same time, the connection between the middle melon slice 3 and the top melon slice 4, as well as the connection between the middle melon slice 3 and the bottom melon slice 2 are also mostly exposed in the welding groove 6c for easy point-finding;

[0035] In order to ensure that the portion of the heavy-duty head 1 originally blocked by the hemispherical cover 6b can be exposed after spot welding, the welding grooves 6c are arranged as intermittently arranged first grooves 6c1 and second grooves 6c2, and the length of the first grooves 6c1 is greater than the length of the second grooves 6c2. In this way, after the heavy-duty head 1 is welded, the heavy-duty head 1 can be suspended by the gantry and rotated to a certain angle so that the unwelded portion is not blocked by the hemispherical cover 6b and is exposed in the second grooves 6c2. At the same time, in order to ensure the overall strength, three first rods 6c3 are fixedly installed in the first grooves 6c1, and two second rods 6c4 are fixedly installed in the second grooves 6c2, and the top and bottom surfaces of the first rods 6c3, the second rods 6c4 and the middle melon slice 3 are not located on the same horizontal plane.

[0036] The bottom melon slice 2, the middle melon slice 3 and the top melon slice 4 are provided with two steel cables 7 outside the bottom ring 6a, and two contraction components 8 for driving the steel cables 7 to contract are provided outside the bottom ring 6a; the contraction component 8 includes a movable lifting platform 8a, a shell 8b fixedly installed on the top of the lifting platform 8a, a hydraulic component 8c fixedly installed in the shell 8b, a clamping claw 8d fixedly installed at the output end of the hydraulic component 8c, and a roller 8e rotatably installed on the shell 8b, the steel cables 7 are slidably connected to the roller 8e, and the clamping claw 8d can clamp the steel cables 7. The top of the end of the shell 8b away from the hydraulic device forms a platform. With the platform, there is no need to carry a ladder and lean on the heavy head 1 for welding. Instead, you can squat or stand on the platform directly. In order to allow the staff to enter the hemispherical cover 6b to weld the inside of the heavy head 1, we have opened a ladder 9 in the ground. The staff enters the inside of the hemispherical cover 6b through the ladder 9 and then performs inner surface welding;

[0037] When using this equipment, first use a heavy gantry to suspend the bottom surface of the bottom melon segment 2 between the bottom ring 6a and the retaining ring 6d through the lifting lug 5 on the bottom melon segment 2, so that the inner side of the bottom melon segment 2 contacts the hemispherical cover 6b, and both sides of the bottom melon segment 2 are exposed by the first groove 6c1. After all the bottom melon segments 2 are leaning against the hemispherical cover 6b, a steel cable 7 is wrapped around a little below the lifting lug 5 below all the bottom melon segments 2, and another steel cable 7 is wrapped around a little below the lifting lug 5 above all the bottom melon segments 2, and then passed around the roller 8e and clamped with the clamping claw 8d, and then the hydraulic assembly 8c is started to gradually tighten the steel cable 7. At this time, the steel cable 7 will contact the bottom of the lifting lug 5 a little above while being tightened and cannot rise anymore, which will cause the diameter of the circle formed by the steel cable 7 to become smaller, thereby clamping the bottom melon segment 2 on the hemispherical cover 6b. At this time, the staff can spot weld the contact part between the two bottom melon segments 2 from the outside, and then enter through the ladder 9. After the bottom melon slice 2 is spot welded, the middle melon slice 3 is suspended on the bottom melon slice 2 by the gantry, so that the bottom surface of the middle melon slice 3 contacts the top surface of the bottom melon slice 2, and the sides of the two are in the same straight line. Then, the hydraulic component 8c output shaft is started to extend, so that the steel cable 7 is loosened and no longer clamps the bottom melon slice 2. After welding, the bottom melon slice 2 has a certain welding strength and will not separate. Then, the lifting platform 8a is started to drive the shell 8b to rise, so that the two steel cables 7 are respectively located a little below the two lifting ears 5 of the middle melon slice 3, and then the hydraulic component 8c output shaft is gradually driven to shorten, so that the steel cable 7 presses the middle melon slice 3 on the hemispherical cover 6b, and then the contact parts between the middle melon slices 3 and the contact parts between the middle melon slice 3 and the bottom melon slice 2 are spot welded. Finally, the top melon slice 4 is hung to the top support of the hemispherical cover 6b, and the top melon slice 4 is spot welded to the middle melon slice 3.

[0038] When it is necessary to start formal welding, the top melon slice 4 and the middle melon slice 3 are completely welded first. The operator only loosens one steel cable 7 at a time and allows the corresponding lifting platform 8a to rotate around the hemispherical cover 6b to the required position. Then, the steel cable 7 is tightened and the person stands at the end of the shell 8b to weld the required parts. After the top melon slice 4 and the middle melon slice 3 are welded, the lower steel cable 7 is lowered to the bottom of the bottom melon slice 2 under the ear 5 for tightening, and then the upper steel cable 7 is lowered to the ear 5 above the bottom melon slice 2 for tightening, and then the bottom melon slice 2 and the middle melon slice 3 are welded. After welding is completed, the steel cable 7 is completely loosened, and the heavy gantry is used to suspend the heavy head 1 and rotate it to a certain angle, so that the unwelded area originally blocked by the hemispherical cover 6b is exposed in the second groove 6c2. After the heavy head 1 is lowered, the unwelded parts can be welded, thereby achieving the purpose of spot welding a device first and then fully welding.

[0039] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., the size, scale, structure, shape and proportion of various components, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientation changes, etc.).

Claims

1. An equidistant spot welding device for head processing, comprising a bottom melon segment (2), a middle melon segment (3) and a top melon segment (4) forming a heavy head (1) from bottom to top, wherein the bottom melon segment (2) is located on the ground, and is characterized in that: The bottom melon segment (2), the middle melon segment (3) and the top melon segment (4) are all fixedly mounted with a lifting lug (5). The bottom of the top melon segment (4) is provided with a hemispherical bracket (6). The hemispherical bracket (6) comprises a bottom ring (6a) in contact with the bottom of the bottom melon segment (2), a hemispherical cover (6b) fixedly connected to the bottom ring (6a), a plurality of welding grooves (6c) distributed in an annular array on the hemispherical cover (6b), and a retaining ring (6c) fixedly mounted on the bottom ring (6a). d), the inner sides of the bottom melon flap (2), the middle melon flap (3) and the top melon flap (4) match the curvature of the outer wall of the hemispherical cover (6b), the gaps between the bottom melon flap (2), the middle melon flap (3) and the top melon flap (4) directly fitting together coincide with the welding groove (6c), the bottom melon flap (2), the middle melon flap (3) and the top melon flap (4) are provided with steel cables (7) on the outside, and the bottom ring (6a) is provided with a contraction component (8) for driving the steel cables (7) to contract; By tightening the steel cable (7) with the lifting lug (5), the bottom melon segment (2) is pressed against the hemispherical cover (6b) for vertical spot welding between each other. After the middle melon segment (3) is hoisted onto the bottom melon segment (2), the steel cable (7) is used to cooperate with the lifting lug (5) to press it against the hemispherical cover (6b) for spot welding. Finally, the top melon segment (4) is hoisted to the top support of the hemispherical cover (6b) and spot welded with the middle melon segment (3).

2. The equidistant spot welding device for head processing according to claim 1 is characterized in that: The welding groove (6c) comprises a first groove (6c1) and a second groove (6c2) distributed in a ring array, a plurality of first rods (6c3) and second rods (6c4) are fixedly connected in the first groove (6c1) and the second groove (6c2), and the width of the first groove (6c1) and the second groove (6c2) gradually increases from top to bottom.

3. The equidistant spot welding device for head processing according to claim 2 is characterized in that: The height of the first groove (6c1) is greater than the height of the second groove (6c2), the number of the second rods (6c4) is N, and the number of the first rods (6c3) is N+1.

4. The equidistant spot welding device for head processing according to claim 2, characterized in that: The top surface and bottom surface of the first rod (6c3), the second rod (6c4) and the middle melon slice (3) are not located on the same horizontal plane.

5. The equidistant spot welding device for head processing according to claim 2, characterized in that: The side edges of the middle melon segment (3) and the bottom melon segment (2) are located on the same plane.

6. The equidistant spot welding device for head processing according to claim 2, characterized in that: The side edges of the middle melon segment (3) and the bottom melon segment (2) are in contact with the first groove (6c1).

7. The equidistant spot welding device for head processing according to claim 1, characterized in that: The retraction assembly (8) includes a movable lifting platform (8a), a shell (8b) fixedly mounted on the top of the lifting platform (8a), a hydraulic assembly (8c) fixedly mounted in the shell (8b), a clamp (8d) fixedly mounted on the output end of the hydraulic assembly (8c), and a roller (8e) rotatably mounted on the shell (8b), the steel cable (7) is slidably connected to the roller (8e), the clamp (8d) can clamp the steel cable (7), and the top of the shell (8b) away from the hydraulic device forms a platform.

8. The equidistant spot welding device for head processing according to claim 1, characterized in that: There are two lifting ears (5) on each of the bottom melon segment (2) and the middle melon segment (3), and the two lifting ears (5) are not located on the same horizontal plane. The number of the steel cables (7) and the contraction components (8) is set to two, and there are multiple lifting ears (5) fixedly installed on the top melon segment (4) and distributed in a circular array.

9. The equidistant spot welding device for head processing according to claim 1, characterized in that: A step (9) is provided in the ground at the bottom of the heavy-duty head (1), and the step (9) leads to the interior of the hemispherical cover (6b).

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