Large LNG storage tank wallboard welding auxiliary device

Abstract

The utility model discloses a large LNG storage tank wallboard welding auxiliary device which comprises an operation platform and a plurality of electric telescopic devices, the telescopic end of each electric telescopic device is fixedly connected with the bottom of the operation platform, and the fixed end of each electric telescopic device is fixedly connected with a balancing weight. The fixed end of each electric telescopic device is fixedly connected with an inclined supporting rod, and the end, away from the corresponding electric telescopic device, of each inclined supporting rod is fixedly connected with a ground anchor. When the electric telescopic device drives the operation platform to ascend and descend, the electromagnet can ascend and descend on the wall plate of the storage tank in an adsorbable mode, stable support is provided for ascending and descending of the operation platform, welding with the wall plate of the storage tank is not needed, welding mark damage to the wall plate of the storage tank is further avoided, and therefore the overall strength of the LNG storage tank is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary devices, in particular to a welding auxiliary device for a large LNG storage tank wall plate. Background Art

[0002] At present, large-scale LNG cryogenic storage tanks are mainly divided into three types: single-capacity tanks, double-capacity tanks and full-capacity tanks.

[0003] A single-containment tank mainly consists of a low-temperature steel inner tank, a tank bottom insulation layer, a foundation, a foundation heating system, a flexible insulation seal, a suspended ceiling, a normal-temperature steel tank top, loose insulation fillers, a normal-temperature steel outer tank (cannot contain liquefied natural gas), and a containment dike.

[0004] The double-containment tank is mainly composed of a low-temperature steel inner tank, a low-temperature steel outer tank, prestressed concrete, a tank bottom insulation layer, a foundation, a foundation heating system, a flexible insulation seal, a suspended ceiling (insulation layer), a normal temperature steel tank top, loose insulation fillers, a normal temperature steel outer tank (cannot contain liquefied natural gas), and a top cover (rain shield).

[0005] The full-containment tank is mainly composed of a low-temperature steel inner tank, a low-temperature steel outer tank, a tank bottom insulation layer, a foundation, a foundation heating system, a flexible cold insulation seal, a suspended ceiling (insulation layer), a normal temperature steel roof, loose insulation filler, a concrete roof, and a prestressed concrete outer tank; the membrane tank is composed of a low-temperature steel inner tank, a prestressed concrete outer tank, a tank bottom insulation layer, a foundation, a foundation heating system, a flexible cold insulation seal, a suspended ceiling (insulation layer), and an inner insulation layer of a concrete outer tank.

[0006] The three main installation methods for the wall panels of large LNG storage tanks are: upright installation and inverted installation. Regardless of the installation method, the tank wall panels need to be spliced, and the auxiliary devices used need to be welded and fixed on the mother plate of the tank wall panels. This welding and fixing operation will produce weld marks on the tank wall panels, which will then damage the tank wall panels, thereby seriously damaging the overall strength, rigidity and stability of the tank.

[0007] Therefore, how to avoid damage to the LNG storage tank wall plate caused by the welding of auxiliary tools when installing the LNG storage tank using auxiliary tools for welding and fixing has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0008] In view of the above-mentioned defects of the prior art, the utility model provides a large-scale LNG storage tank wall panel welding auxiliary device, the purpose of which is to reduce the damage caused to the LNG storage tank wall panel by welding of auxiliary tools and ensure the overall strength of the LNG storage tank.

[0009] In order to achieve the above technical objectives, the utility model provides a large LNG storage tank wall plate welding auxiliary device, including an operating platform and a plurality of electric telescopic devices, the telescopic end of each of the electric telescopic devices is fixedly connected to the bottom of the operating platform, and the fixed end is respectively fixedly connected to a counterweight block;

[0010] A diagonal brace is fixedly connected to the fixed end of each electric telescopic device, and a ground anchor is fixedly connected to one end of the diagonal brace away from the electric telescopic device;

[0011] A transverse support mechanism is respectively installed on the outside of the telescopic end of each electric telescopic device, and the transverse support mechanism includes a telescopic transverse support rod, one end of which is fixedly connected to a detachable clamp, and the clamp is sleeved and fixed to the outside of the telescopic end of the electric telescopic device, and the other end of the transverse support rod is fixedly connected to an electromagnet with a wheel;

[0012] The electromagnet can be adsorbed on the tank wall plate after being energized. When all the electric telescopic devices at the bottom of an operating platform are raised and lowered at the same time, the electromagnet can move up and down following the raising and lowering of the electric telescopic devices.

[0013] Preferably, adjacent diagonal braces are fixedly connected via diagonal braces.

[0014] Preferably, the fixed end of the electric telescopic device is fixedly connected to the counterweight block by bolts.

[0015] Beneficial effects of the utility model:

[0016] Due to the above structural design, when the electric telescopic device drives the operating platform to rise and fall, the electromagnet can be adsorbed on the tank wall plate for rising and falling movement, providing stable support for the lifting of the operating platform, and there is no need to weld to the tank wall plate, further avoiding welding mark damage to the tank wall plate, thereby ensuring the overall strength of the LNG storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is another structural schematic diagram of an embodiment of the utility model.

[0019] In the figure: 1 operating platform, 2 electric telescopic device, 3 counterweight, 4 diagonal support rod, 5 ground anchor, 6 transverse support rod, 7 clamp, 8 electromagnet, 9 tank wall plate, 10 diagonal support rod fixing part, 11 bolt. DETAILED DESCRIPTION

[0020] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0021] Example:

[0022] like Figure 1-Figure 2 As shown, a large-scale LNG storage tank wall plate welding auxiliary device comprises an operating platform 1 and a plurality of electric telescopic devices 2, wherein the telescopic end of each electric telescopic device 2 is fixedly connected to the bottom of the operating platform 1, and the fixed end is fixedly connected to a counterweight block 3;

[0023] A diagonal brace rod 4 is fixedly connected to the fixed end of each electric telescopic device 2 , and a ground anchor 5 is fixedly connected to one end of the diagonal brace rod 4 away from the electric telescopic device 2 .

[0024] A transverse support mechanism is installed on the outside of the telescopic end of each electric telescopic device 2, and the transverse support mechanism includes a telescopic transverse support rod 6, one end of the transverse support rod 6 is fixedly connected to a detachable clamp 7, the clamp 7 is sleeved and fixed on the outside of the telescopic end of the electric telescopic device 2, and the other end of the transverse support rod 6 is fixedly connected to an electromagnet 8 with a wheel.

[0025] The main innovation of the utility model is that the auxiliary device uses an electromagnet 8 with wheels to be adsorbed on the tank wall plate 9 to provide lateral adsorption force; and under the drive of the electric telescopic device 2, it can be raised and lowered on the tank wall plate 9 without welding to the tank wall plate 9, thereby avoiding welding marks caused by welding the tank wall plate 9.

[0026] Specifically, adjacent diagonal braces 4 are fixedly connected by diagonal brace fixing members 10. The horizontal force component of the diagonal braces 4 provides a lateral pulling force, which better ensures that the positional relationship between the operating platform 1 and the tank wall is stable and reliable.

[0027] The fixed end of the electric telescopic device 2 is fixedly connected to the counterweight 3 by means of a bolt 11 .

[0028] Furthermore, in this embodiment:

[0029] The operating platform 1 is a platform composed of 30*6mm No. 20 steel pipes as railings (height 150cm), a 100cm*20cm aluminum alloy plate (fixed by wire binding) is welded to the bottom of the platform, and the bottom of the platform is fixed to the electric telescopic device 2 with bolts.

[0030] The total telescopic height of the electric-controlled telescopic device 2 is 20m. The height of the first section at the bottom is 6m, made of 304 stainless steel, with a wall thickness of 10mm and DN600, and the remaining sections decrease in height successively.

[0031] The counterweight block 3 is made of lead block, each counterweight is 50t, and the weight of the counterweight block 3 can be adjusted according to the height of the storage tank.

[0032] The diagonal brace 4 has a diameter of DN100 and is made of Q235B. Its length is processed according to the actual needs of the auxiliary device on site, and the length is preferably 12 meters.

[0033] The ground anchor 5 is a fully buried ground anchor made of C30 concrete block and weighs 5 tons; it fixes the diagonal brace rod 4.

[0034] The transverse support rod 6 is retractable, has a tube diameter of D60, a wall thickness of 5 mm, and is made of 304 stainless steel; it is used to connect and fix the tank wall plate 9 and the electric telescopic device 2, generating a transverse pulling force of 5KN to prevent the electric telescopic device 2 from tipping over.

[0035] The detachable clamp 7 has a specification of 10 cm in width, 1 cm in thickness, and is made of 304 stainless steel. The clamp 7 is fixed to the transverse support rod 6 between the tank wall plate 9 by two M24 fixing bolts.

[0036] The electromagnet 8 with wheels has a rated suction of 5KN. During operation, it produces a lateral inward pulling force of 5KN on the electric telescopic device 2 to prevent it from tipping over.

[0037] The diagonal brace fixing member 10 is a fixed flat steel with a width of 150 cm, a thickness of 10 cm, and a material of Q235B.

[0038] The bolt 11 is a high-strength bolt with a model of M40 and a material of Q235B, and is used to fasten the counterweight 3 .

[0039] The power control line of the electric telescopic device 2 is a ZC-YJV flame-retardant copper core polyvinyl chloride sheathed low-voltage power cable 3x10mm. The power control line used by the electromagnet 3 has a specification of 2 cores X1.5 square.

[0040] The working principle and use process of this utility model:

[0041] When assembling large LNG storage tanks, a computer terminal can be used to simultaneously control the simultaneous lifting of multiple electric telescopic devices 2 on an operating platform 1. After being energized, the electromagnet 8 can be adsorbed on the tank wall panel 9. When all the electric telescopic devices 2 at the bottom of an operating platform 1 are lifted and lowered at the same time, the electromagnet 8 can move up and down following the lifting and lowering of the electric telescopic devices 2.

[0042] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A large LNG tank wall panel welding auxiliary device, including an operating platform and multiple electric telescopic devices, characterized in that: The telescopic end of each of the electric telescopic devices is fixedly connected to the bottom of the operating platform, and the fixed end is fixedly connected to a counterweight block; A diagonal brace is fixedly connected to the fixed end of each electric telescopic device, and a ground anchor is fixedly connected to one end of the diagonal brace away from the electric telescopic device; A transverse support mechanism is respectively installed on the outside of the telescopic end of each electric telescopic device, and the transverse support mechanism includes a telescopic transverse support rod, one end of which is fixedly connected to a detachable clamp, and the clamp is sleeved and fixed to the outside of the telescopic end of the electric telescopic device, and the other end of the transverse support rod is fixedly connected to an electromagnet with a wheel; The electromagnet can be adsorbed on the tank wall plate after being energized. When all the electric telescopic devices at the bottom of an operating platform are raised and lowered at the same time, the electromagnet can move up and down following the raising and lowering of the electric telescopic devices.

2. The large-scale LNG storage tank wall panel welding auxiliary device according to claim 1 is characterized in that: Adjacent diagonal braces are fixedly connected via diagonal braces.

3. The large-scale LNG storage tank wall plate welding auxiliary device according to claim 1 or 2 is characterized in that: The fixed end of the electric telescopic device is fixedly connected to the counterweight block by bolts.

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