Large Marine Low-Voltage Transformer Jacking Tooling and Installation Method

Abstract

The present invention relates to a jacking tooling part and an installation method for a large marine low-voltage transformer. The tooling part includes a hoisting device and a jacking device. The hoisting device is a rectangular frame 1 with a leg connected to each of its four sides. Two parallel thick steel pipes 2 are bridged across the top of the rectangular frame 1. A wire rope for hoisting equipment is sleeved on each of the thick steel pipes 2. The jacking device includes four jacks 3, and each of the jacks 3 is respectively used to jack up one of the legs. The solution provided by the present invention can lift the equipment in place. At the same time, the weight of the equipment is dispersed by the four jacks 3, so that the hull structure will not be deformed during lifting, and an operating space is left at the bottom of the equipment, so as to facilitate the operators to carry out work such as equipment installation position correction and welding.

Description

Technical Field

[0001] The present invention relates to the field of equipment installation, and particularly to a lifting tooling part for a large marine low-voltage transformer and an installation method thereof. Background Art

[0002] Currently, when installing a large marine low-voltage transformer on the hull deck, a lifting device is required to lift the equipment and transport it to the installation position. Limited by the cabin space, large lifting devices cannot be used. In the prior art, simple lifting devices such as on-board simple manual hoists are usually used to hook the hull to lift the equipment. Since the hull structure steel plate is very thin, it is extremely easy to cause the deformation of the hull structure when the equipment is heavy. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present invention provides a lifting tooling part for a large marine low-voltage transformer and an installation method thereof.

[0004] According to the first aspect of the embodiment of the present invention, a lifting tooling part for a large marine low-voltage transformer is provided, including: a hoisting device and a jacking device. The hoisting device is a rectangular frame 1 with a leg connected to each of its four sides. Two parallel thick steel pipes 2 are bridged on the top of the rectangular frame 1. A wire rope for hoisting the equipment is sleeved on each thick steel pipe 2. The jacking device includes four jacks 3, and each jack 3 is respectively used to jack up one leg.

[0005] Further, a universal wheel 4 is installed at the bottom of each leg.

[0006] Further, it further includes four angle irons 5 for fixing the thick steel pipes 2. One side of each angle iron 5 is a groove that matches the outer edge shape of the thick steel pipe 2, and the other side is connected to the rectangular frame 1 by bolts. The two ends of each thick steel pipe 2 are respectively installed in the grooves of the two angle irons 5 fixed to the tops of the opposite side frames of the rectangular frame 1.

[0007] Further, a plurality of screw holes 6 with different spacings are provided at the tops of the two side frames of the rectangular frame 1 connected to the thick steel pipes 2, so as to adjust the spacing between the two thick steel pipes 2 by adjusting the installation position of the angle iron 5.

[0008] Further, the rectangular frame 1 and the legs are both made of channel steel.

[0009] Further, it further includes a sealing plate 7 for covering the tops of the channel steels around the rectangular frame 1.

[0010] Further, a stop iron 8 is fixed at a position near the bottom of each leg, and the jack 3 jacks up the leg through the stop iron 8.

[0011] According to a second aspect of an embodiment of the present invention, there is provided a method for installing a large marine low-voltage transformer, comprising:

[0012] Use the steel wire rope on the above-mentioned tooling to pass through the lifting ring on the top of the equipment to lift the equipment;

[0013] Four temporary pads 9 are placed at the four legs of the tooling, jacks 3 are placed on the temporary pads 9, the four jacks 3 are operated to lift the equipment at the same time, a stop block 10 is placed under the equipment, and the operator spot welds a thin hull pad 11 under the equipment to level the flatness and verticality of the deck;

[0014] Operate the four jacks 3 to lift the equipment again, remove the stop wood block 10, operate the four jacks 3 to lower the equipment onto the hull thin pad 11, remove the tooling, check the positioning size of the equipment base 12, and after the calibration is completed, weld the hull thin pad 11 and the equipment base 12.

[0015] Furthermore, it also includes:

[0016] Before welding begins, cover the bottom of the equipment with a three-proof cloth to prevent welding slag and welding smoke from invading the interior; after welding, remove welding slag and rust, and paint.

[0017] Furthermore, it also includes:

[0018] When welding, the welding points at the outer diagonal positions are welded first, and then the welding points at the inner diagonal positions are welded, and the welding sequence of the welding points at the adjacent positions is separated.

[0019] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0020] The tooling provided by the present invention can lift the equipment in situ, and at the same time disperse the weight of the equipment through four jacks 3, so that the hull structure will not be deformed during lifting, and an operating space is reserved at the bottom of the equipment for operators to perform work such as equipment installation position correction and welding.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0023] Figure 1 , Figure 2 and Figure 3They are respectively the side view, front view, and top view of the tooling part provided by the embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the installation process status;

[0025] Figure 5 It is another schematic diagram of the installation process status;

[0026] Figure 6 It is a schematic diagram of the welding effect. Detailed implementation manners

[0027] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be more thorough and complete, and can fully convey the scope of the present invention to those skilled in the art.

[0028] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the", and "said" used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0030] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Embodiment 1:

[0032] The large marine low-voltage transformer lifting tooling part provided by the embodiment of the present invention includes: a hoisting device and a lifting device, as Figures 1-4As shown, the hoisting device is a rectangular frame 1 with a leg connected to each of its four sides. Two parallel thick steel pipes 2 are bridged across the top of the rectangular frame 1. A wire rope for hoisting equipment is sleeved on each thick steel pipe 2. The jacking device includes four jacks 3, and each jack 3 is respectively used to jack up a leg.

[0033] In a specific embodiment, the tooling part provided in this embodiment is made of carbon structural steel Q235-A and consists of the following components: 1. The plate thickness is 10 mm; 2. 16b channel steel; 3. Thick steel pipe 2 (welded steel pipe for low-pressure fluid transportation); 4. 16 sets of M16×60 and 8 sets of M12×50 bolts, nuts, and washers (GB / T5781-2000); 5. 4 sets of jacks 3 with a capacity of 2000 - 5000 kg.

[0034] Optionally, for the convenience of moving the tooling part, in this embodiment, as Figure 1 、 2 shown, a universal wheel 4 is installed at the bottom of each leg. In addition, the universal wheel 4 can also be foot-operated for positioning.

[0035] Optionally, as Figure 1 shown, the tooling part further includes four angle irons 5 for fixing the thick steel pipes 2. One side of each angle iron 5 is a groove that fits the outer edge shape of the thick steel pipe 2, and the other side is bolted to the rectangular frame 1. The two ends of each thick steel pipe 2 are respectively installed in the grooves of the two angle irons 5 that are respectively fixed to the tops of the opposite side frames of the rectangular frame 1.

[0036] Optionally, as Figure 3 shown, in this embodiment, a plurality of screw holes 6 with different spacings are provided at the tops of the two side frames of the rectangular frame 1 where it is connected to the thick steel pipes 2, so as to adjust the spacing between the two thick steel pipes 2 by adjusting the installation position of the angle iron 5 to adapt to the lifting lug positions at the tops of different types of equipment.

[0037] Optionally, in this embodiment, both the rectangular frame 1 and the legs are made of channel steel.

[0038] Optionally, in this embodiment, as Figure 3 shown, it further includes a sealing plate 7 for covering the tops of the channel steels around the rectangular frame 1.

[0039] Optionally, in this embodiment, as Figure 1 、 2 、4 shown, a stop iron 8 is fixed at a position near the bottom of each leg, and the jack 3 jacks up the leg through the stop iron 8.

[0040] The method of using the tooling provided in the embodiment of the present invention to lift and lower the equipment is simple to operate, reduces the equipment installation cost, reduces the workload, and is safe and reliable. The overall appearance of the installed equipment is beautiful and reasonable. The tooling can be raised and lowered vertically, and the flatness and verticality of the deck can be corrected. The original performance of the shock-absorbing rubber of the equipment is guaranteed. The tooling can be reused, the manufacturing cost is low, and it is very convenient to move and carry.

[0041] Embodiment 2:

[0042] This embodiment provides a method for installing a large marine low-voltage transformer, including:

[0043] S1. Use the steel wire rope on the above-mentioned tooling to pass through the lifting ring on the top of the equipment to lift the equipment;

[0044] S2, four temporary pads 9 are placed at the positions of the four legs of the tooling, jacks 3 are placed on the temporary pads 9, the four jacks 3 are operated to lift the equipment at the same time, a stop block 10 is placed under the equipment, and the operator spot welds a thin hull pad 11 under the equipment to level the flatness and verticality of the deck;

[0045] Specifically, since the hull deck steel plate is relatively thin, placing the jack 3 directly on the deck will cause the deck to deform. For example, during the jacking process of a 3,000 kg marine equipment, each jack 3 has a pressure of 750 kg. The bottom diameter of the jack 3 is about 120 mm, and the pressure is 66348.20 kg / m2. If a temporary pad 9 of about 300×300×10 mm is placed, the pressure can be reduced to 833.338 kg / m2. 2 , thereby greatly reducing the pressure and deformation caused by the jack 3 on the deck during the equipment lifting process, such as Figure 4 shown.

[0046] When placing the jack 3, the handles of the two jacks 3 on both sides are respectively directed toward the middle, so that one person can operate two jacks 3 at the same time.

[0047] The hull thin pad 11 can be welded to the depression of the deck to level the flatness and verticality of the deck at the installation position of the leveling equipment.

[0048] S3, operate the four jacks 3 to lift the equipment again, remove the stop wood block 10, operate the four jacks 3 to lower the equipment onto the hull thin pad 11, remove the tooling, check the positioning size of the equipment base 12, and after the calibration is completed, weld the hull thin pad 11 and the equipment base 12.

[0049] Optionally, in this embodiment, the method further includes:

[0050] Before starting the welding work, wrap the area under the equipment with a three-proof cloth to prevent electric welding slag and welding fumes from entering the interior. During the welding work, first weld the solder joints at the outer diagonal positions, and then weld the solder joints at the inner diagonal positions, and space the welding sequences of the solder joints at adjacent positions apart. After the welding work is completed, remove the welding slag and rust, and perform a painting treatment.

[0051] Specifically, by adopting the above welding sequence, the positions of adjacent two weldings can be maximally separated, thereby greatly reducing the high-temperature heat transferred to the shock-absorbing rubber at the bottom of the equipment during the welding process, and avoiding the phenomena of aging, deformation, coking and scrapping of the shock-absorbing rubber, and losing the shock-absorbing requirements of large equipment. For example, the welding sequence as shown in Figure 6 can be adopted.

[0052] If it is found during the welding process that heat is transmitted to the shock-absorbing rubber, the shock-absorbing rubber needs to be removed (lift the equipment slightly again with the tooling parts), and then reinstalled after welding.

[0053] After the welding work is completed, remove the welding slag and rust at the above welding parts, and perform a painting treatment, and the complete installation of the equipment is ended.

[0054] Adopting the installation method provided in this embodiment has the following advantages: 1) Solve the problem of being unable to hoist the equipment; 2) During the lifting and lowering process, the height can be controlled to facilitate welding the thin backing plate 11 of the hull and the equipment base 12, and solve the problem of correcting the flatness and perpendicularity of the deck; 3) Avoid the phenomena of aging, deformation, coking and scrapping of the self-provided shock-absorbing rubber during the welding process; 4) The deformation of the deck during the lifting and lowering process can be almost ignored; 5) The tooling parts are simple to manufacture and the lifting process is safe; 6) The whole operation process is simple, saving working hours. Among them, two operators of the jack 3 can complete the lifting operation in one hour; one welder can complete the welding operation in two hours; one painter can complete the operation in one hour; two operators of the jack 3 can lower the equipment in one hour, and the whole operation is ended.

[0055] The above has described the embodiments of the present invention. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application or the improvement of the technology in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. A large-scale low-voltage transformer lifting tooling part for ships, characterized in that, Comprising: A hoisting device and a jacking device. The hoisting device is a rectangular frame (1) with a leg connected to each of its four sides. Two parallel thick steel pipes (2) are bridged across the top of the rectangular frame (1). A wire rope for hoisting equipment is sleeved on each thick steel pipe (2). The jacking device includes four jacks (3), and each jack (3) is respectively used to jack up one leg; It further includes four angle irons (5) for fixing the thick steel pipes (2). One side of each angle iron (5) is a groove that matches the outer edge shape of the thick steel pipe (2), and the other side is bolted to the rectangular frame (1). The two ends of each thick steel pipe (2) are respectively installed in the grooves of two angle irons (5) that are respectively fixed to the tops of the opposite side frames of the rectangular frame (1). A plurality of screw holes (6) with different spacings are provided at the tops of the two side frames of the rectangular frame (1) where the thick steel pipes (2) are connected, so as to adjust the spacing between the two thick steel pipes (2) by adjusting the installation position of the angle iron (5).

2. The marine large low-voltage transformer jacking tooling part according to claim 1, characterized in that, A universal wheel (4) is installed at the bottom of each leg.

3. The large marine low-voltage transformer jacking tooling part according to claim 1, characterized in that, The rectangular frame (1) and the legs are both made of channel steel.

4. The marine large low-voltage transformer jacking tooling part according to claim 3, characterized in that, It further includes a sealing plate (7) for covering the tops of the channel steels around the rectangular frame (1).

5. The large marine low-voltage transformer jacking tooling part according to claim 4, characterized in that, A stop iron (8) is fixed at a position near the bottom of each leg, and the jack (3) jacks up the leg through the stop iron (8).

6. A method for installing a large-scale low-voltage marine transformer, characterized in that, Comprising: Pass the wire rope on the tooling part as described in any one of claims 1-5 through the lifting ring at the top of the equipment to lift the equipment; Place four temporary pads (9) at the positions of the four legs of the tooling part, place the jacks (3) on the temporary pads (9), operate the four jacks (3) to lift the equipment simultaneously, place a cushioning and blocking wooden block (10) under the equipment, and the operator spot-welds the hull thin pads (11) under the equipment to level the flatness and perpendicularity of the deck; Operate the four jacks (3) to lift the equipment again, remove the cushioning and blocking wooden block (10), operate the four jacks (3) to lower the equipment onto the hull thin pads (11), remove the tooling part, check the positioning dimensions of the equipment base (12), and after the check is completed, weld the hull thin pads (11) and the equipment base (12).

7. The method according to claim 6, wherein It further includes: Before the welding work starts, wrap the equipment below with a three-proof cloth to prevent electric welding slag and welding fumes from invading the interior; after the welding work is completed, remove the welding slag and rust, and perform a painting treatment.

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