Construction method of deep sea suction anchor starting frame

Abstract

The invention discloses a construction method of a deep sea suction anchor starting frame, and relates to the technical field of ocean engineering equipment. The construction method of the deep sea suction anchor starting frame comprises the following steps that S100, the structural beams are welded and prefabricated; s200, weight boxes are prefabricated, specifically, the weight boxes are prefabricated in two groups, and the weight boxes are integrally and independently prefabricated; s300, accessories are prefabricated, and transverse plates are welded after lug plate trepanning is completed; step S400, assembling an integral frame, preferably assembling a primary beam and a secondary beam, then welding a weight box and the main beam, and then installing accessories; and S500, overall release is carried out, and sanding and paint spraying are carried out. According to the characteristics and the welding sequence of an object structure, by optimizing the structural design and the welding sequence, rapid assembly is achieved, the construction period is shortened, rod piece welding with the most powerful deformation prevention and control sequence is completed in sequence, and deformation is effectively controlled; and therefore, the welding cost is reduced, resource use is reduced, and the construction efficiency can be improved through the overall construction method.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering equipment, in particular to a method for constructing a deep-sea suction anchor starting frame. Background Art

[0002] Deep-sea suction anchor is an important equipment used in deep-sea engineering. Its launch frame, as the core component for controlling the center of gravity and anchoring connection, has extremely high structural accuracy and strength requirements. The traditional launch frame construction method mainly relies on the overall assembly of components, which are installed from left to right or from top to bottom. However, this method has problems such as long construction period, high cost, slow progress, and many quality problems, which seriously affect the construction progress of the project. In addition, the traditional method is prone to deformation during the construction process, which reduces the accuracy of the structure and is not suitable for mass land construction technology.

[0003] The existing launching frame of deep-sea suction anchors usually adopts a combination design of counterweight block and box-type structure. However, this design will face various deformation problems caused by the welding of thin-walled multiple plates during the construction process, such as bending, twisting, etc., and the welding workload is large, the quality of welding and assembly is low, the use of resources is high, and the efficiency of construction is affected. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for constructing a deep-sea suction anchor launching frame, which solves the problems of various deformations caused by thin-walled multiple plate welding faced by the existing deep-sea suction anchor launching frame during the construction process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for constructing a deep-sea suction anchor starting frame, comprising the following steps:

[0006] Step S100: prefabricate the structural beams by welding, weld the upper and lower webs, add a margin of 1.5 per thousand to the main beam, and cut the secondary beams according to the designed normal length;

[0007] Step S200: prefabricate the counterweight box, weld a plurality of counterweight blocks into two integral parts, prefabricate the counterweight box in two groups, weld the assembled counterweight box with the hook and the sealing plate, and prefabricate the counterweight box as a whole independently;

[0008] Step S300: prefabricate the accessories, stack and temporarily restrain and fix multiple ear plates, drill holes through the ear plates as a whole, weld the transverse plates after drilling the ear plates, tap the holes before welding, and finally conduct pin-through test fitting;

[0009] Step S400: assembling the overall frame, first assembling the main and secondary beams, then welding the counterweight box to the main beam, and then installing accessories;

[0010] Step S500: overall release, the frame is overall released, sandblasting and painting are performed to protect the tapped bolt holes, and after painting, the anode and other counterweights are installed.

[0011] Preferably, the step S100 includes:

[0012] S110: The main beam shall be cut according to 1.5% plus the steel plate cutting allowance in the length direction. When the plate flange and the web are welded, the length of the plate flange will not shrink. The secondary beam can be cut according to the normal design length.

[0013] S120: The flanges of the main beam and the secondary beam are welded to the corresponding upper and lower webs, and the upper and lower webs are welded simultaneously from the middle to both ends;

[0014] S130: After the steel beam is welded, the I-beams that make up the beam body are subjected to heat straightening treatment to determine the overall size and straightness of the composite beam.

[0015] Preferably, the step S200 includes:

[0016] S210: The counterweight block in the counterweight box is welded into a whole by intermittent welding, and a welding groove is prepared in advance on one side where the integral counterweight block is welded to the box wall;

[0017] S220: two adjacent counterweight boxes are paired;

[0018] S230: Weld the assembled counterweight box and hook head. Before welding the hook head, it is necessary to complete the tapping of holes;

[0019] S240: Place the counterweight block into the counterweight box and weld it to the top surface of the counterweight box all around;

[0020] S250: Weld the sealing plate to complete the overall independent prefabrication of the counterweight box assembly.

[0021] Preferably, in the step S210, one of the counterweight blocks in the counterweight box before being welded into a whole is provided with grooves on all sides, and the counterweight block with the groove is located at the outermost side of the counterweight blocks welded into the whole, and the counterweight block with the groove is welded to the sealing plate on the top surface of the counterweight box on all sides.

[0022] Preferably, the step S300 includes:

[0023] S310: Multiple ear plates are temporarily stacked and fixed through temporary constraints, and a hole is made through one end of the ear plate as a whole;

[0024] S320: After completing the ear plate opening, weld and connect the transverse plate, assemble the multiple ear plates welded with the transverse plates into the inner cavity of the protective sleeve, and weld the transverse plate and the protective sleeve. Before welding, the opening and tapping of the protective sleeve need to be completed, and finally the pins are tested.

[0025] Preferably, in step S320, the transverse plate is welded to the adjacent stacked multiple ear plates, and two adjacent transverse plates are welded to the top and bottom of the stacked multiple ear plates.

[0026] Preferably, the step S400 includes:

[0027] S410: First, temporary piers are placed in place, and the main beam is placed on the piers. After confirming that the distance and levelness of the two ends of the main beam meet the accuracy requirements, the frame and the piers are fixed with a stacking system, and the sample punching measurement points are arranged on the top surface of the main beam, the secondary beam positioning line is drawn, and the secondary beam and the main beam are welded in sequence;

[0028] S420: Draw a mark on the counterweight box opposite to the main beam, and weld the left and right sides of the counterweight box symmetrically to the main beams on both sides;

[0029] S430: Accessory installation: first weld the ear plate protective cover to the counterweight box, then install the latch, and finally install the latch sleeve, fix the protective cover and the ear plate with the latch, and install the frame cover and the corresponding frame counterweight in sequence.

[0030] Preferably, in step S430, the frame cover plate is welded between the counterweight box and one of the secondary beams, and the frame cover plate is located between the two main beams, and multiple adjacent frame counterweight plates are divided into four components and installed on the top and bottom of the two main beams.

[0031] Preferably, the step S500 includes:

[0032] S510: Overall release. After the accessories are installed, the frame is released as a whole and sandblasted and painted. The tapped bolt holes must be protected.

[0033] S520: After painting, install the anode and other counterweights on the primary and secondary beams.

[0034] Preferably, in step S520, a plurality of anodes are installed at equal intervals on the front and back sides of the two main beams, and another plurality of anodes are installed on the front and back sides of the two secondary beams.

[0035] The present invention discloses a method for constructing a deep-sea suction anchor starting frame, which has the following beneficial effects:

[0036] The present invention adopts a method of prefabricating parts into small pieces and then welding them into a whole based on the characteristics of the object structure and the welding sequence. By optimizing the structural design and the welding sequence, rapid assembly is achieved, the construction period is shortened, and the welding of rods in the most powerful deformation prevention and control sequence is completed in sequence, thereby effectively controlling deformation. It can reduce unnecessary repetitive work and material waste, thereby reducing welding costs, and can greatly guarantee the quality of welding and assembly into pieces. By optimizing the process, reducing the use of resources, and reducing costs, the overall construction method can improve construction efficiency and is suitable for batch land construction processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the process of constructing a deep-sea suction anchor starting frame of the present invention;

[0039] Figure 2 It is a schematic diagram of the overall framework of the present invention;

[0040] Figure 3 This is a schematic diagram of the main beam prefabrication of the present invention;

[0041] Figure 4 This is a schematic diagram of the prefabrication of the secondary beam of the present invention;

[0042] Figure 5 This is a schematic diagram of the prefabrication of the counterweight box of the present invention.

[0043] Figure 6 It is a schematic diagram of the prefabrication of the accessories of the present invention;

[0044] Figure 7 This is a schematic diagram of the overall frame assembly of the present invention;

[0045] Figure 8 This is a schematic diagram of the assembly of the primary and secondary beams of the present invention;

[0046] Fig. 9 It is a schematic diagram of the assembly of the main and secondary beams and the counterweight box of the present invention.

[0047] In the figure: 101, main beam; 102, secondary beam; 103, frame counterweight plate; 104, anode; 201, counterweight box; 202, counterweight block; 203, sealing plate; 301, hook; 401, protective cover; 402, ear plate; 501, frame cover plate. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The embodiment of the present application provides a method for constructing a deep-sea suction anchor launching frame, which solves the problem of various deformations caused by thin-walled multiple plate welding faced by the existing deep-sea suction anchor launching frame during the construction process, realizes rapid assembly, and completes the welding of rods in the most powerful deformation prevention and control order in sequence according to the structural characteristics, effectively controls deformation, greatly guarantees the quality of welding and assembly, reduces quality problems, and optimizes the process, reduces the use of resources, reduces costs, and effectively reduces rework and material waste, thereby accumulating valuable construction experience for the construction method of the deep-sea suction anchor launching frame, eliminating the expenditure of material and labor costs caused by a large amount of rework, and improving construction efficiency through the overall construction method.

[0050] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0051] The embodiment of the invention discloses a method for constructing a deep-sea suction anchor starting frame.

[0052] According to the attached Figure 1 -9, including the following steps:

[0053] Step S100: prefabrication of structural beams by welding, welding of upper and lower web welds, adding a margin of 1.5 per thousand to the main beam 101, and cutting of the secondary beam 102 according to the designed normal length;

[0054] The detailed step S100 includes:

[0055] S110: The main beam 101 is cut according to 1.5 thousandths plus the steel plate cutting allowance in the length direction. When the plate flange of the main beam 101 is welded with the upper and lower webs, the length of the plate flange will not shrink. The secondary beam 102 can be cut according to the normal design length.

[0056] S120: The plate flanges of the main beam 101 and the secondary beam 102 are welded to the corresponding upper and lower webs. The upper and lower webs are welded from the middle to both ends simultaneously. By controlling the welding sequence, thermal deformation generated during the welding process is avoided, and stress concentration is prevented, especially in areas where welds intersect, welds are dense, or welds are long.

[0057] S130: After the steel beam is welded, the I-beams that make up the beam body are subjected to heat straightening treatment to determine the overall size and straightness of the composite beam, so that the main beam 101 and the secondary beam 102 are both arranged as I-beams, so that the two secondary beams 102 can be installed between the two main beams 101, and the size matching between the main beam 101 and the secondary beam 102 is ensured.

[0058] Step S200: prefabricate the counterweight box 201, weld the multiple counterweight blocks 202 into two integral parts, prefabricate the counterweight box 201 in two groups, weld the assembled counterweight box 201 with the hook 301 and the sealing plate 203, and prefabricate the counterweight box 201 independently as a whole;

[0059] The detailed step S200 includes:

[0060] S210: The counterweight blocks 202 in the counterweight box 201 are welded into a whole by intermittent welding. By controlling the welding sequence, thermal deformation generated during the welding process is avoided and stress concentration is prevented, especially in areas where welds intersect, welds are dense or welds are long, that is, multiple counterweight blocks 202 are stacked adjacent to each other, and the fitting sides of two adjacent counterweight blocks 202 are intermittently welded to achieve the stabilization of multiple counterweight blocks 202 into a counterweight block 202 as a whole, and a welding groove is opened in advance on one side where the integral counterweight block 202 is welded to the box wall. Before the counterweight blocks 202 in the counterweight box 201 are welded into a whole, grooves are opened on all sides of one of the counterweight blocks 202, and the counterweight block 202 with the groove is located at the outermost side of the counterweight block 202 welded into the whole, and the counterweight block with the groove is welded to the sealing plate 203 on the top surface of the counterweight box 201 on all sides.

[0061] S220: Two adjacent counterweight boxes 201 are paired, and the cover plates are not welded temporarily;

[0062] S230: welding the assembled counterweight box 201 and the hook head 301. Before welding the hook head 301, it is necessary to complete the tapping of the hole;

[0063] S240: Put the counterweight block 202 into the counterweight box 201 and weld it to the top surface of the counterweight box 201 all around;

[0064] S250: Welding the sealing plate 203 to complete the overall independent prefabrication of the counterweight box 201 assembly.

[0065] Step S300: prefabricate the accessories, stack and temporarily restrain and fix multiple ear plates 402, perform through-hole drilling on the multiple ear plates 402 as a whole, weld the transverse plate after completing the drilling of the ear plates 402, complete the tapping of the holes before welding, and finally perform pin-through test fitting;

[0066] The detailed step S300 includes:

[0067] S310: Multiple ear plates 402 are temporarily stacked and fixed by temporary restraint, and a hole is penetrated through one end of the ear plate 402 as a whole. By temporarily restraining and fixing the multiple ear plates 402, the multiple ear plates 402 can be neatly stacked together, which is convenient for penetrating holes through the ends of multiple ear plates 402 at one time, and the temporarily restrained ear plates 402 can be restrained and fixed by binding ropes or clips, and the ear plates 402 after the holes are opened need to be unconstrained, so as to be fixedly connected with the transverse plate later;

[0068] S320: After completing the opening of the ear plate 402, weld and connect the transverse plate, assemble the multiple ear plates 402 welded with the transverse plates in the inner cavity of the protective sleeve 401, and weld the transverse plate and the protective sleeve 401. The transverse plate and the adjacent stacked multiple ear plates 402 are welded, and the two adjacent transverse plates are welded to the top and bottom of the stacked multiple ear plates 402. Before welding, the opening and tapping of the protective sleeve 401 need to be completed, and finally, the pins are threaded and tested. Through the setting of the transverse plate, the multiple ear plates 402 can be welded into one.

[0069] Step S400: assembling the whole frame, first assembling the main beam 101 and the secondary beam 102, then welding the counterweight box 201 to the main beam 101, and then installing accessories;

[0070] The detailed step S400 includes:

[0071] S410: First, temporary cushions are placed in place, and the main beam 101 is placed on the cushions. After confirming that the distance and horizontality between the two ends of the main beam 101 meet the accuracy requirements, the frame and the cushions are fixed using stacking, and the two main beams 101 are placed in an "eight" shape on the cushions. Sample punching measurement points are arranged on the top surface of the main beam 101, and the positioning line of the secondary beam 102 is marked. The secondary beam 102 and the main beam 101 are welded in sequence so that the two secondary beams 102 can be fixed between the two main beams 101 arranged in an "eight" shape. According to the position marks, rapid assembly can be achieved, and according to its structural characteristics, the convenience of welding, the operable space, and the moving direction of the equipment are considered to carry out the most effective prevention and control of deformation;

[0072] S420: Mark the counterweight box 201 opposite to the main beam 101, and symmetrically weld the left and right sides of the counterweight box 201 to the main beams 101 on both sides;

[0073] S430: Accessory installation, first weld the ear plate 402 and protective sleeve 401 to the counterweight box 201, then install the latch, and finally install the latch sleeve, use the latch to fix the protective sleeve 401 and the ear plate 402, install the frame cover plate 501 and the corresponding frame counterweight block 202 in sequence, and the frame cover plate 501 is welded between the counterweight box 201 and one of the secondary beams 102, and the frame cover plate 501 is located between the two main beams 101, and multiple adjacent frame counterweight plates 103 are divided into four components and installed on the top and bottom of the two main beams 101. The installed frame can be disassembled according to the characteristics of the object structure and the welding sequence to realize the disassembly and assembly of the deep-sea suction anchor starting frame, and the frame is welded and formed by prefabrication of structural beams, prefabrication of the counterweight box and prefabrication of accessories, and by prefabrication of small pieces into small pieces and then welding them into a whole. By controlling the welding sequence, thermal deformation generated during welding is avoided to prevent stress concentration, especially in areas where welds intersect, welds are dense or welds are long. Moreover, through the prefabrication of structural beam welding, prefabrication of counterweight boxes and accessories, and assembly of the overall frame, unnecessary repetitive work and material waste can be reduced, thereby reducing welding costs and avoiding multiple welding or insufficient welding at welding positions. This can greatly ensure the quality of welding and assembly, improve construction efficiency, and ensure that the project is delivered on time.

[0074] Step S500: overall release, the frame is overall released, sandblasting and painting are performed, and the tapped bolt holes must be protected during sandblasting and painting. After painting is completed, the anode 104 and other counterweights are installed;

[0075] The specific step S500 includes:

[0076] S510: Overall release. After the accessories are installed, the starter frame is released as a whole and sandblasted and painted. The tapped bolt holes need to be protected to prevent the bolt holes from being blocked. Sandblasting and painting can protect the outer wall of the starter frame of the deep-sea suction anchor and reduce the effects of seawater corrosion.

[0077] S520: After the painting is completed, the anode 104 and other counterweights 202 are installed on the main and secondary beams 102. Multiple anodes 104 are installed equidistantly on the front and back sides of the two main beams 101, and another multiple anodes 104 are installed on the front and back sides of the two secondary beams 102. The anode 104 includes but is not limited to zinc anode 104 and magnesium anode 104. The setting of the anode 104 facilitates the formation of primary battery protection, inhibits corrosion reactions, and maintains the stability of the structure.

[0078] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for constructing a deep-sea suction anchor starting frame, characterized in that: The following steps are involved: Step S100: prefabrication of structural beams by welding, welding of upper and lower web welds, adding a margin of 1.5 per thousand to the main beam (101), and cutting of the secondary beam (102) according to the designed normal length; Step S200: prefabricate the counterweight box (201), weld a plurality of counterweight blocks (202) into two integral parts, prefabricate the counterweight box (201) in two groups, weld the assembled counterweight box (201) with the hook (301) and the sealing plate (203), and prefabricate the counterweight box (201) as a whole independently; Step S300: prefabricate the accessories, stack and temporarily restrain and fix the multiple ear plates (402), perform through-hole drilling on the multiple ear plates (402), weld the transverse plate after the ear plates (402) are drilled, complete the tapping before welding, and finally perform pin-through test fitting; Step S400: assembling the overall frame, first assembling the main beam (101) and the secondary beam (102), then welding the counterweight box (201) and the main beam (101), and then installing accessories; Step S500: overall release, the frame is overall released, sandblasting and painting are performed to protect the tapped bolt holes, and after painting is completed, the anode (104) and other counterweights are installed.

2. A method for constructing a deep-sea suction anchor launching frame according to claim 1, characterized in that: The step S100 includes: S110: The main beam (101) is cut according to 1.5 thousandths plus the steel plate cutting allowance in the length direction. When the plate flange and the web are welded, the length of the plate flange will not shrink. The secondary beam (102) can be cut according to the normal design length. S120: The plate flanges of the main beam (101) and the secondary beam (102) are welded to the corresponding upper and lower webs, and the upper and lower webs are welded from the middle to both ends simultaneously; S130: After the steel beam is welded, the I-beams that make up the beam body are subjected to heat straightening treatment to determine the overall size and straightness of the composite beam.

3. The method for constructing a deep-sea suction anchor launching frame according to claim 1, characterized in that: The step S200 includes: S210: The counterweight block (202) in the counterweight box (201) is welded into a whole by an intermittent welding method, and a welding groove is prepared in advance on one side where the integral counterweight block (202) is welded to the box wall; S220: Two adjacent counterweight boxes (201) are paired; S230: welding the assembled counterweight box (201) and the hook head (301), and before welding the hook head (301), it is necessary to complete the tapping of the hole; S240: Put the counterweight block (202) into the counterweight box (201), and weld the top surface of the counterweight box (201) around the counterweight block (202); S250: Welding the sealing plate (203) to complete the overall independent prefabrication of the counterweight box (201) assembly.

4. A method for constructing a deep-sea suction anchor launching frame according to claim 3, characterized in that: In the step S210, before the counterweight blocks (202) in the counterweight box (201) are welded into a whole, one of the counterweight blocks (202) has grooves on all sides, and the counterweight block (202) with the grooves is located at the outermost side of the counterweight block (202) welded into the whole, and the counterweight block with the grooves is welded to the sealing plate (203) at the top surface of the counterweight box (201) on all sides.

5. The method for constructing a deep-sea suction anchor launching frame according to claim 1, characterized in that: The step S300 includes: S310: Multiple ear plates (402) are temporarily stacked and fixed by temporary restraint, and a hole is penetrated through one end of the ear plate (402); S320: After the ear plates (402) are opened, the transverse plates are welded and connected, and the multiple ear plates (402) welded with the transverse plates are assembled in the inner cavity of the protective sleeve (401), and the transverse plates and the protective sleeve (401) are welded. Before welding, the opening and tapping of the protective sleeve (401) need to be completed, and finally a pin-through test fit is performed.

6. A method for constructing a deep-sea suction anchor launching frame according to claim 5, characterized in that: In the step S320, the transverse plate is welded to the adjacent stacked multiple ear plates (402), and two adjacent transverse plates are welded to the top and bottom of the stacked multiple ear plates (402).

7. The method for constructing a deep-sea suction anchor launching frame according to claim 1, characterized in that: The step S400 includes: S410: First, temporary cushions are placed in place, the main beam (101) is placed on the cushions, and after confirming that the distance between the two ends of the main beam (101) and the horizontality meet the accuracy requirements, the frame and the cushions are fixed by using a stacking method, and sample punching measurement points are arranged on the top surface of the main beam (101), the positioning line of the secondary beam (102) is marked, and the secondary beam (102) and the main beam (101) are welded in sequence; S420: Mark the counterweight box (201) with a mark corresponding to the main beam (101), and symmetrically weld the left and right sides of the counterweight box (201) to the main beams (101) on both sides; S430: Accessory installation: first weld the ear plate (402) and the protective sleeve (401) to the counterweight box (201), then install the latch, and finally install the latch sleeve, fix the protective sleeve (401) and the ear plate (402) with the latch, and install the frame cover plate (501) and the corresponding frame counterweight block (202) in sequence.

8. A method for constructing a deep-sea suction anchor launching frame according to claim 7, characterized in that: In step S430, the frame cover plate (501) is welded between the counterweight box (201) and one of the secondary beams (102), and the frame cover plate (501) is located between the two main beams (101), and the adjacent plurality of frame counterweight plates (103) are divided into four components and installed on the top and bottom of the two main beams (101).

9. The method for constructing a deep-sea suction anchor launching frame according to claim 1, characterized in that: The step S500 includes: S510: Overall release. After the accessories are installed, the frame is released as a whole and sandblasted and painted. The tapped bolt holes must be protected. S520: After the painting is completed, the anode (104) and other counterweights (202) are installed on the primary and secondary beams (102).

10. A method for constructing a deep-sea suction anchor launching frame according to claim 9, characterized in that: In the step S520, a plurality of anodes (104) are installed at equal distances on the front and back sides of the two main beams (101), and another plurality of anodes (104) are installed on the front and back sides of the two secondary beams (102).

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