Welding device for reinforcing ring of LNG (Liquefied Natural Gas) storage tank

Abstract

The utility model belongs to the technical field of storage tank reinforcing ring machining equipment, and particularly relates to a welding device for an LNG storage tank reinforcing ring. The welding device comprises a bottom plate, a workpiece positioning seat for placing a workpiece is arranged on the upper surface of the bottom plate, and a rotating seat fixedly mounted on the bottom plate is arranged at the circle center position of the workpiece positioning seat; a rotating seat is arranged on the inner base, a mounting column is rotatably arranged on the rotating seat, a telescopic rod is vertically arranged at the top end of the mounting column, a welding head is mounted at the tail end of the telescopic rod, and the welding head is used for welding an annular fillet weld of a workpiece. The welding machine head is simple in structure and convenient to operate, welding and positioning of the LNG storage tank reinforcing ring can be conveniently achieved, the specificity is high, meanwhile, the rotating base, the hydraulic cylinder and the telescopic rod are matched, welding work of the annular fillet weld of the LNG storage tank reinforcing ring can be achieved after the welding machine head rotates by one circle, work intensity can be reduced, and work efficiency can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of storage tank reinforcement ring processing equipment, and specifically relates to a welding device for LNG storage tank reinforcement rings. Background Art

[0002] With the development of the LNG industry, the safe and stable operation of LNG storage tanks is the key to maintaining the normal operation of the entire LNG receiving station. The reinforcement ring is an important component of large storage tanks and plays a vital role in the overall safe operation of the storage tank. For large LNG storage tanks, when the tank is empty, installing a reinforcement ring inside the tank can resist the extrusion outside the tank, reduce the calculated length of the cylinder, and improve the ability to resist instability. The current LNG tank reinforcement rings are composed of webs and wing plates. Due to the special position structure of the webs and wing plates, they cannot be adapted to the existing ring welding machines on the market, which leads to the existing webs and wing plates being welded manually, which has high work intensity and low production efficiency. Utility Model Content

[0003] The purpose of this application is to address the shortcomings of the prior art and to design a welding device for the reinforcement ring of an LNG storage tank by cooperating with a rotating seat, a hydraulic cylinder, a telescopic rod, a workpiece positioning seat and a welding head. The device can allow the welding head to move in a circular, left and right, and up and down motions, so that the welding work of the annular corner weld of the reinforcement ring of the LNG storage tank can be achieved after the welding head rotates one circle, thereby solving the problem of how to reduce work intensity and improve work efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is:

[0005] A welding device for a reinforcement ring of an LNG storage tank comprises a base plate, on the upper surface of which a workpiece positioning seat for placing a workpiece is fixedly mounted via support piles, the workpiece positioning seat being an annular structure, a rotating seat fixedly mounted on the base plate being arranged at the center position of a circle of the workpiece positioning seat, a casing being rotatably arranged on the rotating seat, a mounting column being arranged at the top of the casing, a telescopic rod being vertically arranged at the top of the mounting column, a welding head being mounted at the end of the telescopic rod, and the welding head being used for welding an annular fillet weld of the workpiece.

[0006] Preferably, the workpiece positioning seat comprises an inner base and an outer base, the inner base is snap-fitted and placed on the outer base, and an "L"-shaped mounting groove for placing the workpiece is reserved between the outer base and the inner base.

[0007] Preferably, the inner base comprises an inner support plate of an annular structure, a plurality of outer edge limiting plates are evenly arranged on the outer side of the upper surface of the inner support plate, and hooks are arranged on the outer side walls corresponding to the inner support plate and the outer edge limiting plates.

[0008] Preferably, the inner diameter of the inner support plate is matched with the outer diameter of the web plate, and the inner diameter of the outer edge limit plate is matched with the outer diameter of the wing plate.

[0009] Preferably, the outer base comprises an outer support plate of an annular structure, an inner edge positioning boss is arranged on the inner side of the upper surface of the outer support plate, an outer edge positioning plate is arranged on the outer side of the upper surface of the outer support plate, and a plurality of lifting grooves compatible with the lifting hooks are opened on the outer support plate.

[0010] Preferably, the inner diameter of the outer edge positioning plate is matched with the outer diameter of the outer edge limiting plate, and the outer diameter of the inner edge positioning boss is matched with the inner diameter of the web.

[0011] Preferably, a plurality of inner edge positioning columns are evenly arranged on the top of the inner edge positioning boss.

[0012] Preferably, the support piles correspond to the positions of the outer edge positioning plates.

[0013] Preferably, a plurality of marking lines are arranged on the upper surface of the base plate, and the marking lines are distributed on the base plate in a circular array with the center of the base plate as the center, and the marking lines correspond to the positions of the support piles.

[0014] Preferably, the casing includes an upper casing and a lower casing, the bottom end of the lower casing is rotatably mounted on the output shaft at the top of the rotating seat through a bearing, the output shaft is connected to the servo motor inside the rotating seat through a reducer, a hydraulic cylinder is installed at the inner bottom of the lower casing, the top of the hydraulic cylinder is connected to the top of the upper casing, and a mounting column is fixedly arranged at the top of the upper casing.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1) The present application designs a welding device for the reinforcement ring of an LNG storage tank by cooperating with a rotating seat, a hydraulic cylinder, a telescopic rod, a workpiece positioning seat and a welding head, which enables the welding head to move in a circular, left-right and up-and-down manner, and then the welding work of the annular fillet weld of the reinforcement ring of the LNG storage tank can be achieved after the welding head rotates one circle, solving the problem of how to reduce work intensity and improve work efficiency;

[0017] 2) By using the inner base and the outer base to form a workpiece positioning seat, an "L"-shaped installation groove for horizontal placement of the LNG tank reinforcement ring can be reserved, which is convenient for welding positioning of the LNG tank reinforcement ring, has strong speciality, and is convenient for completing the welding operation of the LNG tank reinforcement ring;

[0018] 3) By arranging a hook on the inner base, the inner base can be coordinated with the overhead crane in the workshop, which is convenient for lifting and transporting the inner base and the workpiece, and helps to improve work efficiency;

[0019] 4) By setting marking lines on the base plate, the marking lines can be used to indicate the distance between the support piles and the center of the base plate, which facilitates the positioning and installation of the support piles, thereby effectively improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of this application.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure on the back.

[0022] Figure 3 It is a structural schematic diagram of the side of this application.

[0023] Figure 4 It is a top view of the present application.

[0024] Figure 5 It is a structural schematic diagram of the workpiece positioning seat in this application.

[0025] Figure 6 It is a structural schematic diagram of the inner base in this application.

[0026] Figure 7 It is a structural schematic diagram of the outer base in this application.

[0027] Figure 8 It is a schematic diagram of the structure of the workpiece in this application.

[0028] Among them: 1. Mounting column; 2. Telescopic rod; 3. Inner base; 4. Outer base; 5. Welding head; 6. Rotating seat; 7. Marking line; 8. Bottom plate; 9. Support pile; 10. Workpiece; 11. Casing; 301. Inner support plate; 302. Outer edge limit plate; 303. Hook; 401. Outer support plate; 402. Outer edge positioning plate; 403. Inner edge positioning column; 404. Inner edge positioning boss; 405. Lifting groove; 1001. Web plate; 1002. Wing plate. DETAILED DESCRIPTION

[0029] like Figure 8 As shown, the present application describes a welding device for an LNG tank reinforcement ring, wherein the workpiece 10 is an LNG tank reinforcement ring, comprising a web 1001 and a wing plate 1002, the wing plate 1002 being formed by welding and splicing a plurality of arc-shaped plates, the inner wall of the wing plate 1002 being welded and fixed to the middle of the outer wall of the web 1001, and its projection on a plane parallel to its central axis is a "T"-shaped structure.

[0030] like Figure 1-4As shown, a welding device for a reinforcement ring of an LNG storage tank described in the present application includes a base plate 8, which is preferably a circular structure to facilitate the positioning and installation of a workpiece positioning seat and a rotating seat 6; a workpiece positioning seat for placing a workpiece 10 is fixedly installed on the upper surface of the base plate 8 through a support pile 9, and the workpiece positioning seat is a ring-shaped structure; a rotating seat 6 is fixedly installed in the middle of the upper surface of the base plate 8, a servo motor and a reducer are arranged inside the rotating seat 6, an output shaft is arranged at the center of the upper surface of the rotating seat 6, the servo motor is connected to the output shaft through the reducer, and the servo motor is connected to an external power supply and a controller; a housing 11 is rotatably arranged on the rotating seat 6, and the housing 11 includes The upper housing and the lower housing are included. The center of the bottom end of the lower housing is rotatably mounted on the output shaft through a bearing. A hydraulic cylinder is installed at the inner bottom of the lower housing. The top of the hydraulic cylinder is connected to the top of the upper housing. The upper housing can be controlled to lift and lower through a hydraulic rod. A mounting column 1 is fixedly arranged at the top of the upper housing. A telescopic rod 2 is installed at the top of the mounting column 1. The telescopic rod 2 is perpendicular to the axis of the mounting column 1 and the housing 11. A welding head 5 is installed at the end of the telescopic rod 2. The telescopic rod 2 can drive the welding head 5 to move back and forth. The welding head 5 is connected to an external power supply and adopts a submerged arc welding head or a gas shielded welding head to weld the annular fillet weld of the workpiece 10. Through the cooperation of the rotating seat 6, the housing 11, the telescopic rod 2, the workpiece positioning seat and the welding head, the welding work of the annular fillet weld of the workpiece 10 can be realized after the welding head rotates one circle, which helps to reduce the work intensity and improve the work efficiency. At the same time, this structural design can better achieve adaptation with the remote control system and facilitate automatic control.

[0031] like Figure 1-5 As shown, the workpiece positioning seat includes an inner base 3 and an outer base 4. The inner base 3 is snap-fitted and placed on the outer base 4. An "L"-shaped mounting groove is reserved between the outer base 4 and the inner base 3 for placing the workpiece 10.

[0032] like Figure 6 As shown, the inner base 3 includes an inner support plate 301, which is an annular structure. A plurality of outer edge limit plates 302 are evenly arranged on the outer side of the upper surface of the inner support plate 301, and hooks 303 are arranged on the outer side walls corresponding to the inner support plate 301 and the outer edge limit plates 302; wherein, the outer diameter of the outer edge limit plate 302 is the same as the outer diameter of the inner support plate 301, the inner diameter of the outer edge limit plate 302 is adapted to the outer diameter of the wing plate 1002, and the inner diameter of the inner support plate 301 is adapted to the outer diameter of the web 1001, so that the inner base 3 can be used for positioning and placing the wing plate 1002, and the hook 303 can cooperate with the overhead crane in the workshop, so as to realize the lifting and transportation of the inner base 3 and the wing plate 1002, which helps to improve work efficiency.

[0033] like Figure 7As shown, the outer base 4 includes an outer support plate 401, which is an annular structure. An inner edge positioning boss 404 is arranged on the inner side of the upper surface of the outer support plate 401, and a plurality of inner edge positioning columns 403 are evenly arranged on the top of the inner edge positioning boss 404. An outer edge positioning plate 402 is arranged on the outer side of the upper surface of the outer support plate 401, and a plurality of lifting grooves 405 matched with the hook 303 are opened on the outer support plate 401; wherein, the inner diameter of the outer edge positioning plate 402 is matched with the outer diameter of the outer edge limiting plate 302, and the outer diameter of the inner edge positioning boss 404 is matched with the inner diameter of the web 1001, so that the outer base 4 can be used for positioning and placing the web 1001 and the inner base 3, and the lifting groove 405 facilitates the connection and fixing operation of the overhead crane and the hook 303 during lifting, and the inner edge positioning column 403 is used for removing the lifting rope, so as to improve the transportation efficiency.

[0034] As a preferred method, a plurality of marking lines 7 are provided on the upper surface of the base plate 8. The marking lines 7 are distributed on the base plate 8 in a circular array with the center of the base plate 8 as the center. The marking lines 7 correspond to the positions of the support piles 9. The marking lines 7 are used to indicate the distance between the support piles 9 and the center of the base plate 8, which is convenient for positioning and installation of the support piles 9 and can effectively improve the installation efficiency. The top of the support pile 9 is provided with a slot that is compatible with the outer support plate 401, and the support column 9 corresponds to the position of the outer edge positioning plate 402, which can not only reduce the influence of the top of the support pile 9 on the viewing angle, making it convenient to observe whether the inner base 3 is placed stably, but also avoid the lifting slot 405 to achieve complete engagement of the support pile 9 with the outer base 4, which helps to improve the stability of the placement of the workpiece 10.

Claims

1. A welding device for a reinforcement ring of an LNG storage tank, comprising a bottom plate (8), characterized in that: A workpiece positioning seat for placing a workpiece (10) is fixedly mounted on the upper surface of the base plate (8) via a support pile (9); the workpiece positioning seat is an annular structure; a rotating seat (6) fixedly mounted on the base plate (8) is arranged at the center of the circle of the workpiece positioning seat; a housing (11) is rotatably arranged on the rotating seat (6); a mounting column (1) is arranged at the top end of the housing (11); a telescopic rod (2) is vertically arranged at the top end of the mounting column (1); a welding head (5) is installed at the end of the telescopic rod (2); the welding head (5) is used to weld the annular fillet weld of the workpiece (10).

2. A welding device for a reinforcement ring of an LNG storage tank according to claim 1, characterized in that: The workpiece positioning seat comprises an inner base (3) and an outer base (4); the inner base (3) is snap-fitted and placed on the outer base (4); an "L"-shaped installation groove for placing the workpiece (10) is reserved between the outer base (4) and the inner base (3).

3. A welding device for a reinforcement ring of an LNG storage tank according to claim 2, characterized in that: The inner base (3) comprises an inner support plate (301) of an annular structure, a plurality of outer edge limiting plates (302) are evenly arranged on the outer side of the upper surface of the inner support plate (301), and hooks (303) are arranged on the outer side walls corresponding to the inner support plate (301) and the outer edge limiting plates (302).

4. A welding device for a reinforcement ring of an LNG storage tank according to claim 3, characterized in that: The inner diameter of the inner support plate (301) is matched with the outer diameter of the web plate (1001), and the inner diameter of the outer edge limiting plate (302) is matched with the outer diameter of the wing plate (1002).

5. A welding device for a reinforcement ring of an LNG storage tank according to claim 3, characterized in that: The outer base (4) comprises an outer support plate (401) of an annular structure, an inner edge positioning boss (404) is arranged on the inner side of the upper surface of the outer support plate (401), an outer edge positioning plate (402) is arranged on the outer side of the upper surface of the outer support plate (401), and a plurality of lifting grooves (405) adapted to the lifting hooks (303) are provided on the outer support plate (401).

6. A welding device for a reinforcement ring of an LNG storage tank according to claim 5, characterized in that: The inner diameter of the outer edge positioning plate (402) matches the outer diameter of the outer edge limiting plate (302), and the outer diameter of the inner edge positioning boss (404) matches the inner diameter of the web (1001).

7. A welding device for a reinforcement ring of an LNG storage tank according to claim 6, characterized in that: A plurality of inner edge positioning columns (403) are evenly arranged on the top of the inner edge positioning boss (404).

8. A welding device for a reinforcement ring of an LNG storage tank according to claim 7, characterized in that: The support piles (9) correspond to the positions of the outer edge positioning plates (402).

9. A welding device for a reinforcement ring of an LNG storage tank according to claim 1, characterized in that: A plurality of marking lines (7) are arranged on the upper surface of the bottom plate (8), and the marking lines (7) are distributed on the bottom plate (8) in a circular array with the center of the bottom plate (8) as the center, and the positions of the marking lines (7) and the supporting piles (9) correspond to each other.

10. The welding device for the reinforcement ring of an LNG storage tank according to claim 1, characterized in that: The casing (11) comprises an upper casing and a lower casing, the bottom end of the lower casing is rotatably mounted on an output shaft at the top end of a rotating seat (6) via a bearing, the output shaft is connected to a servo motor inside the rotating seat (6) via a reducer, a hydraulic cylinder is mounted on the inner bottom of the lower casing, the top end of the hydraulic cylinder is connected to the top end of the upper casing, and a mounting column (1) is fixedly arranged on the top end of the upper casing.

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