CN115709943A - Lifting device for assisting in centering during installation of low-temperature pipeline of ship and using method - Google Patents

Abstract

The invention discloses a lifting device for auxiliary centering of a ship's low-temperature pipeline installation and its use method. The position adjusts the height of the temporary frame, and the parts can be freely combined by splicing and installing M12 bolts and lock nuts, that is, when the gear positions match, the lifting of pipelines under different pipe diameters can be completed quickly and conveniently, so as to assist the pipeline The centering work of the road port. The invention is suitable for the low-temperature pipelines with high density and complicated shape on the deck of the LNG carrier, and the device has the advantages of simple structure, convenient use, low cost and strong versatility.

Description

Lifting device for auxiliary centering of ship's low-temperature pipeline installation and its use method

technical field

The invention relates to the technical field of LNG transport ship construction, in particular to a lifting device and a use method for installation and auxiliary centering of low-temperature pipelines of ships.

Background technique

Ship cryogenic pipelines generally refer to liquefied natural gas with a circulation temperature of about -163°C in the pipeline or special pipelines that can withstand gasification at this temperature. The pipelines that circulate liquefied natural gas are called liquid cargo pipelines. Natural gas pipelines are called volatile pipelines. According to the different functions of liquid cargo operation, the liquid cargo pipeline can be divided into liquid cargo discharge pipeline (usually DN250~DN500), liquid cargo injection pipeline (DN450), cargo tank spray and stripping pipeline (DN65 ), gas discharge pipeline (DN40); the diameter of the volatilization pipeline is DN350～DN600. Most of the liquid cargo pipelines and volatilization pipelines are installed on the dome deck. Due to the large diameter of the pipes, if there is no auxiliary tooling during installation and alignment, it will inevitably cause great difficulties in the installation accuracy and welding work. A temporary frame is set directly above the centering pipeline to lift the pipeline to a predetermined height.

In the prior art, the Chinese invention patent 201811216070.5 discloses a pipeline centering tool, which determines the center point of the nozzle through the combination of the circuit path, the open circuit and the indicator light. This invention is limited to the installation of small-diameter pipelines , not suitable for lifting and precision control of large-diameter pipelines such as low-temperature pipelines in ships. At present, there is no standard temporary frame for lifting pipelines when installing pipelines on the deck of LNG transport ships. As a part of the installation frame, it is welded with different lengths of angle steel. The outfitting parts include the support frame of the pre-assembled pipeline and the beam frame and column supported on the high module pipeline. It mainly involves the following two installation methods:

Method 1. The support frame under the pre-installed pipeline can be used as the bottom platform of the temporary frame, and two vertical angle steels are installed on the platform as columns and the horizontal angle steel is used as a beam frame to form a basic frame for hoisting pipelines. The method is not completely suitable for the whole section of low-temperature pipeline due to the position of the support frame under the pipeline and the distance between the support frames.

Method 2. The beam frame on the high module pipeline can constitute the upper part of the temporary frame, and the columns can form the left and right support parts of the temporary frame. Sometimes the distance between the two side-by-side columns used for the high module pipeline does not meet the temporary requirements of the pre-installed pipeline. Because of the frame structure, it is necessary to add some vertically installed angle steels to fix the hull deck, and the above parts are combined to become a temporary hanger for the lifting of the pipeline.

Among these two methods, the first method is limited by the position of the support frame and the distance between adjacent support frames, so it cannot be fully applied to the entire section of low-temperature pipelines, and it cannot be used on low-temperature pipelines with different pipe diameters. According to the on-site location, re-cut to produce materials with different lengths, the versatility is not strong, resulting in a large waste of materials. In method 2, since the support frame of the low-temperature pipeline of the higher module on the deck only exists near the dome of the No. scope of application.

To sum up, in the current ship cryogenic pipeline installation process, there is a lack of an auxiliary tool with strong applicability and material savings and an auxiliary frame for quickly and simply completing the centering of the pipeline ports.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, to realize the fast and convenient construction and installation of low-temperature and normal-temperature piping systems on the deck, and to design a low-temperature pipeline suitable for LNG carriers with high density and complex shape. Piping system, to complete the lifting of the pipeline and to assist the centering work of the pipeline port.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The invention discloses a lifting device for installing auxiliary centering of low-temperature pipelines in ships and a method for using the auxiliary centering device. The base is fixedly erected on the bottom of the auxiliary centering device and welded on both sides of the ship deck. The middle part of the auxiliary centering device is provided with the middle support rod. The upper end of the base fixing frame and the lower end of the middle support rod are connected by M12 bolts and locks. The fastening nut is fixedly connected, the crossbeam is erected on the top of the auxiliary centering device, the lower end of the crossbeam frame and the upper end of the intermediate support rod are fixedly connected with the lock nut through M12 bolts, and the width extension direction of the crossbeam frame is set There is the channel steel of the lifting ring, and the channel steel of the lifting ring is fixedly connected with the beam frame through M12 bolts and lock nuts;

The base fixing frame is composed of two base plates, a base connecting plate, a base steel pipe and a base support plate, and the two base plates are symmetrically arranged at both ends of the ship deck, and the lower ends of the base steel pipes are welded and vertically connected to the Directly above the base plate, the upper end of the base steel pipe is welded to the base connecting plate, and the base support plate is welded and connected to the bottom of the base connecting plate and close to the inside of the auxiliary centering and lifting device ;

The intermediate support rod is composed of a support rod base plate, a support rod connecting plate, a support rod steel pipe and a support rod support plate, and the base connecting plate and the support rod bottom plate are both provided with internal threaded holes, through which M12 bolts penetrate the internal threaded holes It is fixedly connected with the lock nut, the upper end of the support rod bottom plate is vertically provided with the support rod steel pipe, the upper end of the support rod steel pipe is welded to the support rod connecting plate, and the support rod support plate is welded and connected to the support rod The bottom of the connecting plate is close to the inner side of the auxiliary centering lifting device;

The top beam frame includes a beam frame bottom plate, a beam frame top plate, a beam steel pipe and a beam frame support plate, and the bottom plate of the beam frame and the connecting plate of the support rod are provided with internally threaded holes, and the bottom plate of the beam frame The connecting plate of the support rod is fixedly connected with the lock nut through the inner threaded hole through the M12 bolt, and the steel pipe for the beam is vertically welded under the top plate of the beam frame, and the support plate of the beam frame is welded and connected to the bottom plate of the beam frame Below, the said beam support plate is provided with internally threaded holes;

The channel steel of the suspension ring includes a channel steel and a suspension ring. The channel steel is provided with an internal threaded hole, which is fixedly connected with the support plate of the beam frame through the internal threaded hole and the lock nut through the M12 bolt. The suspension ring is integrally assembled on the on the channel steel.

According to the present invention, the connection between the base plate and the base steel pipe, the connection between the support rod bottom plate and the support rod steel pipe, and the connection between the beam frame bottom plate and the cross beam steel pipe are all provided with reinforcement plates, The reinforcing plates are all welded and fixed according to the position on the drawings in a 90° relationship, and the reinforcing plates are equilateral triangular carbon steel plates with a thickness of 8mm.

According to the present invention, the connection between the base steel pipe and the base connecting plate, the connection between the support rod steel pipe and the support rod connecting plate, and the connection between the beam steel pipe and the top plate of the beam frame are all provided with reinforcement plates, The reinforcing plates are uniformly welded at equal angles on the circumference of the base steel pipe, the support rod steel pipe and the beam steel pipe, and the reinforcing plate is an equilateral triangular carbon steel plate with a thickness of 8 mm.

Reinforced liners are respectively provided under the base support plates, support bar support plates and beam frame support plates of the present invention, and the reinforcement liner plates are right-angled trapezoidal carbon steel plates with a thickness of 8mm.

的圆板。The base bottom plate of the present invention has two diameters

round plate.

的圆板，在其圆周上均匀打出的

螺纹孔，螺纹孔圆心设有

圆形凸台。Both the base connecting plate and the supporting rod connecting plate of the present invention have diameters

A circular plate, evenly punched on its circumference

Threaded hole, the center of the threaded hole is set

Round boss.

的圆板、在圆周上均匀打出

的螺纹孔，在螺纹孔圆心上设有

的圆孔。Both the support bar bottom plate and the beam frame bottom plate described in the present invention have diameters

The circular plate is evenly punched on the circumference

The threaded hole is set on the center of the threaded hole

round hole.

的螺纹孔。The suspension rings of the present invention are four, adopt 3 tons of general suspension rings of standard type, described channel steel is 8# standard type channel steel, and length is 1240mm, at the two ends of described channel steel, be respectively provided with diameter

threaded holes.

的螺纹孔，上述螺纹孔可分别与吊环槽钢的相配合，通过M12螺栓贯穿内螺纹孔与锁紧螺母固定连接，形成所述底座固定架与所述吊环槽钢的组合，所述底座固定架、所述横梁架与所述吊环槽钢的组合和所述底座固定架、所述中间支撑杆、所述横梁架和所述吊环槽钢的组合。According to the present invention, various combinations can be formed by mating and connecting with each other according to the heights.

The above-mentioned threaded holes can be matched with the channel steel of the lifting ring respectively, and are fixedly connected with the lock nut through the inner threaded hole through the M12 bolt to form the combination of the base fixing frame and the channel steel of the lifting ring, and the base is fixed frame, the combination of the beam frame and the ring channel steel and the combination of the base fixing frame, the middle support rod, the beam frame and the ring channel steel.

A method for using an auxiliary centering device for installation of a low-temperature pipeline in a ship, the steps are as follows:

S1, place a lifting device for auxiliary centering of low-temperature pipeline installation on ships on both sides of the pre-installed low-temperature pipeline, and weld and fix the base fixing frame of the device to the deck. The base fixing frame can hoist the pipeline according to the needs For the specific location, choose to weld directly with the deck surface or weld with the I-shaped bracket around the pipeline;

S2, according to the position and height of the pipeline itself, judge whether to fix and assemble the base fixing frame and the intermediate support frame through M12 bolts;

S3, according to the position of the pipeline, select the lifting ring directly above the pipeline, hang the chain hoist on the lifting ring of the top beam, tie the pipeline with a strap, and hang it with the hook of the chain hoist to ensure that the pipeline elevated verticality;

S4, by pulling the chain of the manual hoist, the height of the required centering pipeline is raised or lowered until the pipeline and the pipeline opposite to it, the pipeline gap and the opening of the split surface meet the design requirements;

S5, center the pipeline and fix it by spot welding with embedded iron;

S6, after the alignment of the pipeline is checked and accepted, the butt joint welding operation of the pipeline is performed.

Based on the above-mentioned technical solution, a lifting device and a method of use for auxiliary centering of ship low-temperature pipeline installation in the present invention have been practically applied in ship construction, and have achieved the following technical effects:

1. The parts of the lifting device for auxiliary centering of the ship's low-temperature pipeline installation of the present invention are all spliced and installed by M12 bolts and lock nuts, and are welded and fixed by reinforcing plates and reinforcing liners. The present invention has a simple structure and is easy to use , low cost and strong versatility.

2. The various parts of the lifting device for the installation and centering of a ship's low-temperature pipeline of the present invention are suitable for low-temperature pipelines with high density and complex shape on the deck of an LNG carrier, and can be adjusted according to the installation position of the low-temperature pipeline. The height of the temporary frame can be freely combined, that is, when the gears are matched, the lifting of the pipelines under different pipe diameters can be completed quickly and conveniently, so as to assist the centering of the pipeline ports.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the combined hoisting of the base fixing frame, the middle support rod, the top beam frame and the channel steel of the lifting ring of a lifting device for the installation and centering of the ship's low-temperature pipeline.

Fig. 2 is a connection diagram of the top beam frame and the ring channel steel of the invention of a lifting device for installation and centering of low-temperature pipelines in ships.

Fig. 3 is a schematic diagram of the use of the volatilization pipeline lifting and centering of the invention of a lifting device for installation and centering of low-temperature pipelines in ships.

Fig. 4 is a schematic diagram of the combination of the base fixing frame and the ring channel steel of the lifting device invented for the installation and centering of the ship's low-temperature pipeline.

Fig. 5 is a schematic diagram of the combination of the base fixing frame, the beam frame, and the channel steel of the lifting ring of the invention of a lifting device for the installation and centering of the ship's low-temperature pipeline.

The labels in the figure are expressed as: 1-base fixing frame, 11-base bottom plate, 12-base connecting plate, 13-base steel pipe, 14-base support plate

2-middle support rod, 21-support rod bottom plate, 22-support rod connecting plate, 23-support rod steel pipe, 24-support rod support plate

3-beam frame, 31-beam frame bottom plate, 32-beam frame top plate, 33-beam steel pipe, 34-beam frame support plate,

4-ring channel steel, 41-channel steel, 42-ring,

5-M12 bolt, 6-chain hoist

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

The present invention provides a lifting device and a method of use for installation and auxiliary centering of low-temperature pipelines in ships. The auxiliary centering device is arranged on the ship deck, as shown in FIG. 1 , and its structure includes a base fixing frame 1 and an intermediate support rod 2 , beam frame 3 and ring channel steel 4, the base fixing frame 1 is located at the bottom of the auxiliary centering device and welded on both sides of the ship deck, and the middle part of the auxiliary centering device is provided with the middle support rod 2, so The upper end of the base fixing frame 1 and the lower end of the middle support rod 2 are fixedly connected by M12 bolts and lock nuts. The upper end of support bar 2 is fixedly connected with lock nut by M12 bolt, and the width extension direction of described crossbeam frame 3 is provided with described suspension ring channel steel 4, described, suspension ring channel steel 4 and described crossbeam frame 3 are connected by M12 bolt. The locking nut is fixedly connected; the base fixing frame 1 is two base plates 11, a base connecting plate 12, a base steel pipe 13 and a base support plate 14, and the two base plates 11 are symmetrically arranged at both ends of the ship deck, so The lower end of the base steel pipe 13 is welded and vertically connected directly above the base plate 11, the upper end of the base steel tube 13 is welded to the base connecting plate 12, and the base support plate 14 is welded to the base connecting plate 12 below is close to the inner side of the auxiliary centering lifting device; the middle support rod 2 is a support rod bottom plate 21, a support rod connecting plate 22, a support rod steel pipe 23 and a support rod brace 24, and the base connecting plate 12 and the support rod Bottom plates 21 are all provided with internally threaded holes, which are fixedly connected with lock nuts through M12 bolts penetrating through the internally threaded holes. The supporting rod connecting plate 22 is welded and connected, and the supporting rod supporting plate 24 is welded and connected to the inside of the auxiliary centering lifting device below the supporting rod connecting plate 22; the top beam frame 3 includes a beam frame bottom plate 31 and a beam frame top plate 32 , crossbeam steel pipe 33 and crossbeam support plate 34, described crossbeam bottom plate 31 and described support rod connecting plate 22 all offer internally threaded holes, described crossbeam frame bottom plate 31 and described support rod connecting plate 22 pass through by M12 bolts The inner threaded hole is fixedly connected with the lock nut, the beam steel pipe 33 is welded vertically below the beam frame top plate 32, the beam frame support plate 34 is welded and connected to the beam frame bottom plate 31 below, and the beam frame support plate 34 is provided with an internally threaded hole; the ring channel steel 4 includes a channel steel 41 and a suspension ring 42, and the channel steel 41 is provided with an internally threaded hole, and the crossbeam support plate 34 passes through the internally threaded hole and the lock through the M12 bolt The tight nut is fixedly connected, and the suspension ring is integrally assembled on the channel steel 41 .

的圆板、壁厚18mm，A3材质的碳素钢制作而成。In this embodiment, there are two bottom plates 11 of the base, and these two bottom plates are composed of a piece with a diameter of

The round plate, wall thickness 18mm, is made of A3 carbon steel.

的圆板、壁厚18mm，A3材质的碳素钢制作而成，在其直径

圆周上均匀打出

的螺栓孔，在其圆心上开出

的圆孔。Described strut bar bottom plate 21, described crossbeam frame bottom plate 31 are altogether four, and these four bottom plates are made of a diameter of

The circular plate, wall thickness 18mm, made of A3 carbon steel, in its diameter

evenly on the circumference

The bolt hole is drilled on its center

round hole.

的圆板、壁厚18mm，A3材质的碳素钢制作而成，在其直径

圆周上均匀打出

的螺栓孔，其圆心存在

圆形凸台。该底座连接板12和支撑杆连接板22配合支撑杆底板21和所述横梁架底板31使用。The base connecting plate 12 and the support rod connecting plate 22 are totally four, and these four connecting plates consist of a piece with a diameter of

The circular plate, wall thickness 18mm, made of A3 carbon steel, in its diameter

evenly on the circumference

The bolt hole, the center of which exists

Round boss. The base connecting plate 12 and the supporting rod connecting plate 22 are used in conjunction with the supporting rod bottom plate 21 and the beam frame bottom plate 31 .

The connecting plate 22 of the support rod and the bottom plate 31 of the beam frame are connected into one body through M12 bolts and nuts.

的螺栓孔。The base support plate 14, the support rod support plate 24, and the beam frame support plate 34 are six in total, and are made of carbon steel with a length of 180mm and a width of 66mm. Cut out a circular arc plate with a radius of R95 in its length direction, and make a diameter at a position 20mm from the wide side end, 33mm from the long side end, 55mm from the wide side end, and 33mm from the long side end.

bolt holes.

的螺栓孔。该螺栓孔配合所述所述底座撑板14、支撑杆撑板24、横梁架支撑板34使用。Described channel steel 41 is one, is made by the channel steel of 8# standard type, and length 1640mm is made, and respectively at the two ends of channel steel apart from wide side end 20mm, the position of long side center line, apart from wide side end 55mm , and the positions of the centerlines of the long sides respectively draw a diameter

bolt holes. The bolt holes are used in conjunction with the base support plate 14 , the support rod support plate 24 , and the beam frame support plate 34 .

Described lifting ring 42 is four, adopts 3 tons of general lifting rings of factory standard standard type to make.

The reinforcing plates are thirty-six, all of which are triangles (side length after chamfering) with a thickness of 8mm and equilateral 45mm, made of carbon steel of A3 material, and the two ends of the reinforcing plates are provided with 5mm chamfering Angle, the reinforcing plate, there are four connecting carbon steel pipes at the position of the base bottom plate 11 and the support rod bottom plate 21, all welded uniformly at equal angles on the circumference of the carbon steel pipe, at the position of the base connecting plate 12 and the supporting rod connecting plate 22 There are two carbon steel pipes at the place, and the two reinforcement plates are welded in a 90° relationship according to the position on the drawing.

Described reinforcing liner is twelve, adopts right-angled trapezoid, and the length of upper side is 70mm, and the length of lower side is 130mm, and waist length is 65mm, and thickness is 8mm, and the carbon steel of A3 material is made. The two long corners of the lower side are chamfered with 5mm.

的圆板、壁厚18mm，A3材质的碳素钢制作而成，3吨通用吊环42与槽钢41通过焊接形式连接一体，且槽钢41与横梁架支撑板34通过M12螺栓螺母连接固定。As shown in Figure 2, there are two beam frame top plates 32, and these two beam frame top plates 32 are all made of a piece with a diameter of

Circular plate, wall thickness 18mm, made of carbon steel of A3 material, 3 tons of universal lifting ring 42 and channel steel 41 are connected as one by welding, and channel steel 41 and beam support plate 34 are connected and fixed by M12 bolts and nuts.

The present invention also relates to a method for using an auxiliary centering device for installation of a ship's low-temperature pipeline, as shown in Figure 3, the steps are as follows:

S1, place a lifting device for auxiliary centering of low-temperature pipeline installation on ships on both sides of the pre-installed low-temperature pipeline, and weld and fix the base fixing frame of the device to the deck. The base fixing frame can hoist the pipeline according to the needs For the specific location, choose to weld directly with the deck surface or weld with the I-shaped bracket around the pipeline;

S2, according to the position and height of the pipeline itself, judge whether to fix and assemble the base fixing frame and the intermediate support frame through M12 bolts;

S3, according to the position of the pipeline, select the lifting ring directly above the pipeline, hang the chain hoist on the lifting ring of the top beam, tie the pipeline with a strap, and hang it with the hook of the chain hoist to ensure that the pipeline elevated verticality;

S4, by pulling the chain of the manual hoist, the height of the required centering pipeline is raised or lowered until the pipeline and the pipeline opposite to it, the pipeline gap and the opening of the split surface meet the design requirements;

S5, center the pipeline and fix it by spot welding with embedded iron;

S6, after the alignment of the pipeline is checked and accepted, the butt joint welding operation of the pipeline is performed.

In step S1, the base of the centering device can be directly welded to the deck surface or welded to the I-shaped bracket around the pipeline according to the specific position of the hoisting pipeline. It is only necessary to ensure that the base part can be firm. There is no risk of tipping and rollover; in step S2, whether to choose to install the intermediate support frame is related to the position and height of the required operation pipeline itself, and it is not necessary to install the intermediate support frame; in step S3, the channel steel of the lifting ring For the multiple lifting rings in the pipeline, the lifting ring directly above the pipeline needs to be selected according to the position of the pipeline to ensure the verticality of the pipeline lifting.

As shown in Figure 4-5, the above method of use can also adjust the height of the temporary frame according to the height of the low-temperature piping system on site, that is, when the stalls match, the base fixing frame 1 and the ring channel steel 4 shown in Figure 4 are combined for hoisting. The combined hoisting of the base fixed frame 1, the beam frame 3 and the ring channel steel 4 of Fig. 5 is used.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. A lifting device for auxiliary centering of low-temperature pipeline installation in a ship, characterized in that the auxiliary centering device is arranged on the deck of a ship, and its structure includes a base fixing frame (1) connected to each other, an intermediate support rod (2) , beam frame (3) and ring channel steel (4), the base fixing frame (1) is located at the bottom of the auxiliary centering device and is welded on both sides of the ship deck, and the middle part of the auxiliary centering device is provided with the The middle support rod (2), the upper end of the base fixing frame (1) and the lower end of the middle support rod (2) are fixedly connected by M12 bolts and lock nuts, and the beam frame (3) is arranged on the auxiliary centering device The top of the beam frame (3), the lower end of the beam frame (3) and the upper end of the middle support rod (2) are fixedly connected by M12 bolts and lock nuts, and the width extension direction of the beam frame (3) is provided with the ring groove Steel (4), the ring channel steel (4) and the beam frame (3) are fixedly connected by M12 bolts and lock nuts; The base fixing frame (1) is two base plates (11), base connecting plate (12), base steel pipe (13) and base support plate (14), and the two base plates (11) are arranged symmetrically on the ship At both ends of the deck, the lower end of the base steel pipe (13) is welded and vertically connected directly above the base plate (11), and the upper end of the base steel pipe (13) is welded to the base connecting plate (12), The base support plate (14) is welded and connected to the inner side of the auxiliary centering lifting device under the base connecting plate (12); The middle support rod (2) is composed of a support rod bottom plate (21), a support rod connection plate (22), a support rod steel pipe (23) and a support rod support plate (24), and the base connection plate (12) is connected with the support rod The bottom plates of the rods (21) are all provided with internally threaded holes, which are fixedly connected to the lock nuts through the internally threaded holes through the M12 bolts. The upper end of the rod steel pipe (23) is welded to the support rod connection plate (22), and the support rod support plate (24) is welded and connected to the inner side of the auxiliary centering lifting device below the support rod connection plate (22); The top beam frame (3) comprises a beam frame bottom plate (31), a beam frame top plate (32), a beam steel pipe (33) and a beam frame support plate (34), and the beam frame bottom plate (31) is connected to the support bar The connecting plates (22) are all provided with internally threaded holes, the bottom plate of the beam frame (31) and the connecting plate of the support rod (22) are fixedly connected with the lock nuts through the internally threaded holes through the M12 bolts, and the top plate of the beam frame ( 32) The beam steel pipe (33) is welded vertically below, the beam frame brace (34) is welded and connected to the bottom of the beam frame bottom plate (31), and the beam frame brace (34) is provided with an internal thread hole ; The ring channel steel (4) includes a channel steel (41) and a suspension ring (42). The channel steel (41) is provided with an internally threaded hole, and the beam support plate (34) passes through the internal thread through an M12 bolt. The hole is fixedly connected with the locking nut, and the suspension ring (42) is integrally assembled on the channel steel (41). 2. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the connection between the base bottom plate (11) and the base steel pipe (13), the support rod bottom plate ( 21) The connection with the support rod steel pipe (23) and the connection between the bottom plate of the beam frame (31) and the beam steel pipe (33) are all equipped with reinforcement plates, and the reinforcement plates are all in accordance with the positions on the drawings It is welded and fixed in a 90° relationship, and the reinforcing plate is an equilateral triangle carbon steel plate with a thickness of 8mm. 3. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the connection between the base steel pipe (13) and the base connecting plate (12), the support rod steel pipe (23) The connection with the support rod connecting plate (22) and the connection between the beam steel pipe (33) and the beam frame top plate (32) are all provided with reinforcement plates, and the reinforcement plates are all in accordance with the base steel pipe (13 ), the equiangular uniform welding on the circumference of the support rod steel pipe (23) and the beam steel pipe (33), and the reinforcing plate is an equilateral triangle carbon steel plate with a thickness of 8mm. 4. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the support plates (14) of the base (14), the support plates (24) of the support rods (24) and the support plates (34) of the beam frame Reinforced liners are provided below, and the reinforced liners are right-angled trapezoidal carbon steel plates with a thickness of 8 mm. 5. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the bottom plate of the base (11) has two diameters

round plate. 6. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the base connecting plate (12) and the support rod connecting plate (22) are both diameters

A circular plate, evenly punched on its circumference

Threaded hole, the center of the threaded hole is set

Round boss. 7. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, both the bottom plate of the support rod (21) and the bottom plate of the beam frame (31) have a diameter of

The circular plate is evenly punched on the circumference

The threaded hole is set on the center of the threaded hole

round hole. 8. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, characterized in that, the channel steel (41) is an 8# standard type channel steel with a length of 1240mm, and the Both ends are respectively provided with diameter

The threaded hole, described lifting ring (42) is four, adopts 3 tons of general lifting rings of standard type. 9. The lifting device for auxiliary centering of ship cryogenic pipeline installation according to claim 1, the lifting device for auxiliary centering can be connected with each other according to the height to form various combinations, characterized in that, the various combinations are , set a diameter of

The above-mentioned threaded holes can be matched with the ring channel steel (4) respectively, and are fixedly connected with the lock nut through the inner threaded hole through the M12 bolt to form the base fixing frame (1) and the ring channel steel (4). 4), the combination of the base fixing frame (1), the beam frame (3) and the ring channel steel (4) and the base fixing frame (1), the middle support rod (2) . The combination of the beam frame (3) and the ring channel steel (4). 10. A method for using an auxiliary centering device installed in a ship's cryogenic pipeline, characterized in that the steps are as follows: S1, placing a lifting device for auxiliary centering of the low-temperature pipeline installation of a ship on both sides of the pre-installed low-temperature pipeline, and welding and fixing the base fixing frame (1) of the device to the deck. The base fixing frame (1) can be According to the specific position of the hoisting pipeline, choose to weld directly with the deck surface or weld with the I-shaped bracket around the pipeline; S2, according to the position and height of the pipeline itself, judge whether to fix and assemble the base fixing frame (1) and the intermediate support frame (2) through M12 bolts; S3, according to the position of the pipeline, select the lifting ring (41) directly above the pipeline, hang the hand chain hoist on the lifting ring (41) of the channel steel (4) of the lifting ring, tie the pipeline with a strap, and pull it with the hand The hook of the gourd is hooked to ensure the verticality of the pipeline lifting; S4, by pulling the chain of the manual hoist, the height of the required centering pipeline is raised or lowered until the pipeline and the pipeline opposite to it, the pipeline gap and the opening of the split surface meet the design requirements; S5, center the pipeline and fix it by spot welding with embedded iron; S6, after the alignment of the pipeline is checked and accepted, the butt joint welding operation of the pipeline is performed.

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