An efficient installation method for underwater waterproof casing flange

Abstract

The present invention relates to the technical field of flange installation methods, and specifically to an efficient installation method for an underwater waterproof casing flange, wherein a movable plate is located on the inner side above a slot and is rotatably connected to the top of a flange seating ring body, a spring sheet is located above a slot cavity, one end of the spring sheet is fixedly connected to the outer side surface of the flange seating ring body, and the other end abuts against the inner surface of the movable plate, and baffles are respectively arranged on both sides of the slot and are fixedly connected to the flange seating ring body. After the block is aligned with a buckle portion, the lifting flange is pressed down to allow the block to enter the slot of the buckle portion; the movable plate and the baffle fix the block in the slot, thereby positioning the lifting flange on the flange seating ring, so that the screw holes of the flange seating ring correspond to the screw holes of the small flange of the waterproof casing one by one, facilitating the insertion and tightening of the bolts; the flange seating ring aligns and fixes the small flange of the waterproof casing with the lifting flange, avoiding displacement between the two, which results in the inability of the bolts to be inserted into the corresponding screw holes to mount the lifting flange on the waterproof casing.

Description

Technical Field

[0001] The invention relates to the technical field of flange installation methods, and in particular to an efficient installation method for an underwater watertight casing flange. Background Art

[0002] The navigation area of ​​Bohai Sea contains a large amount of oil and gas resources, but the oil and gas development in this area is not suitable for the use of jackets. The development model based on the steel cylinder protection system is an excellent way to solve the oil and gas resources in the navigation area. Unlike the traditional jacket with a fixed waterproof casing on the jacket, the steel cylinder is hollow inside and has no lateral support structure. After the waterproof casing is driven into the mud, it can only be fixedly connected to the base plate at the bottom of the steel cylinder. The flange connection form is undoubtedly the simplest and most reliable, so the underwater lifting and installation of the flange is the most critical. There are difficulties in observation and flange alignment when the flange is in place underwater. The traditional underwater observation method is mainly carried out by underwater robots, but for the semi-enclosed space after excavation, robot observation has the disadvantages of extremely poor visibility and high cost, which is not suitable for this operation method. Moreover, if the sling is used directly for lifting, the flange with a smaller radius will inevitably cause the sling to be entangled, affecting underwater construction.

[0003] When installing a traditional underwater waterproof casing, there is no mechanism for aligning the upper and lower flanges. The upper flange needs to be rotated to align the screw holes with the lower flange. When inserting the bolts to fix them, the lack of a positioning mechanism can easily cause the screw holes in the upper and lower parts to shift, requiring re-alignment, which is cumbersome and increases the difficulty of construction. Summary of the invention

[0004] The main purpose of the present invention is to provide an efficient installation method for an underwater watertight casing flange, so as to solve the problem in the related art that there are no components on the upper and lower flanges that are positioned and aligned with each other.

[0005] In order to achieve the above object, according to one aspect of the present invention, there is provided an efficient installation method for an underwater waterproof casing flange, comprising the following steps: Step 1: inserting one end of one of the slings into an opening of the I-beam at the left end of the upper front side of the I-beam support rod and fixing it, and inserting the other end into an opening of the I-beam at the right end of the upper front side of the I-beam support rod and fixing it; Step 2: Insert one end of the other sling into the opening of the I-beam at the left end of the upper rear side of the I-beam support and fix it, and insert the other end into the opening of the I-beam at the right end of the upper rear side of the I-beam support and fix it; Step 3: Gather the middle parts of the two slings to the middle part above the I-beam support pole and hang them on the floating hook head; Step 4: Pass one end of a sling through the opening of the I-beam at the left end of the lower part of the I-beam support rod, and then fix the two ends of the sling to the lifting rings respectively; Step 5: Pass one end of the other sling through the opening of the I-beam at the right end of the lower part of the I-beam support rod, and then fix the two ends of the sling to the lifting rings respectively; Step 6: Use the lifting equipment to drive the floating hook head to move, lift the lifting flange to the predetermined position, and then put it underwater; Step 7: The diver goes into the water, assists the floating hook head to move, puts the lifting flange on the riser, and moves it down along the riser to above the small flange of the riser and the flange seating ring; Step 8: Align the clamping blocks with the clamping slots respectively, press down the lifting flange, and the clamping block squeezes the movable plate so that the movable plate rotates around its top into the clamping cavity. The clamping block continues to move down to the bottom of the movable plate. The movable plate is bounced up by the spring sheet and pressed on the upper surface of the clamping block, and the lifting flange is restricted on the flange positioning ring; Step 9: Pass the bolts through the screw holes of the lifting flange and the small flange of the waterproof casing in turn and tighten them to fix the lifting flange and the small flange of the waterproof casing together.

[0006] Furthermore, the waterproof casing is provided with a base plate and a positioning portion, and the base plate is located below the positioning portion.

[0007] Furthermore, the base plate includes an inner tube, a base plate flange, a sleeve guide and a plurality of reinforcing ribs. The base plate flange and the sleeve guide are fixedly sleeved on the outer ring of the inner tube. The base plate flange is located above the sleeve guide. The upper ends of the reinforcing ribs are fixedly connected to the bottom surface of the base plate flange, and the side surfaces are fixedly connected to the inner tube.

[0008] Furthermore, the positioning part includes a small flange of the riser sleeve, a flange seating ring and a plurality of triangular ribs. The small flange of the riser sleeve is fixedly sleeved on the outer ring of the riser sleeve, the flange seating ring is fixedly arranged above the small flange of the riser sleeve, the top ends of the triangular ribs are fixedly connected to the lower surface of the small flange of the riser sleeve, and the sides are fixedly connected to the outer surface of the riser sleeve.

[0009] Furthermore, the flange seating ring comprises a flange seating ring body and a plurality of snap-fit ​​parts, the flange seating ring body is fixedly connected to the small flange of the watertight casing, and the snap-fit ​​parts are all arranged on the upper part of the outer ring of the flange seating ring.

[0010] Further, the buckle portion includes a slot group, a block group and a limit group, the slot group includes a slot and a cavity, the block group includes two blocks, a baffle and a vertical block, and the limit group includes a movable plate, a buffer block and a spring sheet.

[0011] Furthermore, the slot is located at the upper outer part of the flange seating ring, the baffle is located at the bottom of the slot, the vertical block is located at the inner lower part of the slot, and is fixedly connected to the baffle and the flange seating ring.

[0012] Furthermore, the movable plate is located on the inner side above the slot and is rotatably connected to the top of the flange seating ring body. The spring sheet is located above the slot. One end of the spring sheet is fixedly connected to the outer side of the flange seating ring body, and the other end is against the inner surface of the movable plate. The buffer block is fixedly provided at the lower end of the inner surface of the movable plate. The stop blocks are respectively provided on both sides of the slot and are fixedly connected to the flange seating ring body.

[0013] Furthermore, the lifting flange includes a lifting flange, a plurality of clamping blocks, a plurality of screw holes and four lifting rings. The clamping blocks are fixed on the inner surface of the lifting flange and correspond to the buckle parts. The screw holes are vertically penetrated on the lifting flange, and the lifting rings are fixed on the outer surface of the lifting flange.

[0014] Furthermore, at least eight I-beam openings are provided on the I-beam support rod, and the I-beam openings are divided into two layers, the upper layer of the I-beam openings are respectively located at the four corners at both ends above the side wings of the I-beam support rod, and the lower layer of the I-beam openings are respectively located at the four corners at both ends below the side wings of the I-beam support rod, and there are at least four slings.

[0015] Compared with the prior art, the present invention has the following beneficial effects: after the clamping block is aligned with the buckle part, the lifting flange is pressed down to make the clamping block enter the clamping groove of the buckle part; the movable plate and the baffle fix the clamping block in the clamping groove, thereby positioning the lifting flange on the flange seating ring, so that the screw holes of the flange seating ring and the screw holes of the small flange of the watertight casing correspond one to one, which is convenient for the insertion and tightening of the bolts; the flange seating ring aligns and fixes the small flange of the watertight casing with the lifting flange, avoiding misalignment between the two, which causes the bolts to be unable to be inserted into the corresponding screw holes to fix the lifting flange on the watertight casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the flange hoisting installation of the present invention; Figure 2 This is a diagram of the steps for flange hoisting and installation of the present invention; Figure 3 It is a schematic diagram of the shoulder pole beam of the present invention; Figure 4 It is a schematic diagram of the waterproof casing of the present invention; Figure 5 This is a schematic diagram of the base plate of the present invention; Figure 6 It is an overall schematic diagram of the lifting flange of the present invention; Figure 7 This is an overall schematic diagram of the flange seating ring of the present invention; Figure 8 This is a cross-sectional view of the flange in place ring of the present invention; Fig. 9 It is a schematic diagram of the buckle structure of the present invention.

[0017] Illustration Description: 1. Waterproof casing; 2. Base plate; 3. Lifting flange; 4. I-beam support rod; 5. Lifting belt; 6. I-beam opening; 7. Small flange of waterproof casing; 8. Flange in place ring; 9. Triangular rib plate; 10. Base plate flange; 11. Casing guide; 12. Reinforcement rib plate; 31. Lifting flange; 32. Block; 33. Screw hole; 34. Lifting ring; 81. Flange in place ring; 82. Buckle part; 821. Slot; 822. Block; 823. Movable plate; 824. Baffle; 825. Vertical block; 826. Buffer block; 827. Card cavity; 828. Spring sheet. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] See also Figures 1 to 9 This embodiment provides an efficient installation method for an underwater waterproof casing flange, comprising the following steps: Step 1: insert one end of one of the slings 5 ​​into the I-beam opening 6 at the left end of the upper front side of the I-beam support rod 4 and fix it, and insert the other end into the I-beam opening 6 at the right end of the upper front side of the I-beam support rod 4 and fix it; Step 2: Insert one end of another sling 5 into the I-beam opening 6 at the left end of the upper rear side of the I-beam support rod 4 and fix it, and insert the other end into the I-beam opening 6 at the right end of the upper rear side of the I-beam support rod 4 and fix it; Step 3: gather the middle parts of the two slings 5 ​​to the middle part above the I-beam support rod 4 and hang them on the floating hook head; Step 4: Pass one end of a sling 5 through the I-beam opening 6 at the lower left end of the I-beam support rod 4, and then fix the two ends of the sling 5 to the lifting ring 34 respectively; Step 5: Pass one end of another sling 5 through the I-beam opening 6 at the lower right end of the I-beam support rod 4, and then fix the two ends of the sling 5 to the lifting ring 34 respectively; Step 6: Use the lifting equipment to drive the floating hook head to move, lift the lifting flange 3 to the predetermined position, and then put it underwater; Step 7: The diver goes into the water, assists the floating hook head to move, puts the lifting flange 3 on the riser 1, and moves it downward along the riser 1 to above the riser small flange 7 and the flange seating ring 8; Step 8: Align the clamping block 32 with the clamping groove 821 respectively, press the lifting flange 3 downward, the clamping block 32 squeezes the movable plate 823, so that the movable plate 823 rotates around its top into the clamping cavity 827, and the clamping block 32 continues to move downward to the bottom of the movable plate 823, and the movable plate 823 is bounced up by the spring sheet 828 and pressed on the upper surface of the clamping block 32, and the lifting flange 3 is restricted on the flange positioning ring 8; Step nine: Pass the bolts through the screw holes 33 of the lifting flange 3 and the small flange 7 of the waterproof casing in sequence and tighten them to fix the lifting flange 3 and the small flange 7 of the waterproof casing together.

[0020] The waterproof casing 1 is provided with a base plate 2 and a positioning portion, wherein the base plate 2 is located below the positioning portion. Waterproof casings 1 of different diameters can be used to meet different work requirements.

[0021] The base plate 2 includes an inner tube, a base plate flange 10, a sleeve guide 11 and a plurality of reinforcing ribs 12. The base plate flange 10 and the sleeve guide 11 are fixedly sleeved on the outer ring of the inner tube. The base plate flange 10 is located above the sleeve guide 11. The upper ends of the reinforcing ribs 12 are fixedly connected to the bottom surface of the base plate flange 10, and the sides are fixedly connected to the inner tube, thereby increasing the contact area between the base plate flange 10 and the inner tube, so that the base plate flange 10 is firmly sleeved on the inner tube, thereby enhancing the overall stability of the base plate 2.

[0022] The positioning part includes a small flange of the riser sleeve 7, a flange positioning ring 8 and a plurality of triangular ribs 9. The small flange of the riser sleeve 7 is fixedly sleeved on the outer ring of the riser sleeve 1, and the flange positioning ring 8 is fixedly arranged above the small flange of the riser sleeve 7. The top ends of the triangular ribs 9 are fixedly connected to the lower surface of the small flange of the riser sleeve 7, and the sides are fixedly connected to the outer surface of the riser sleeve 1, thereby enhancing the stability of the small flange of the riser sleeve 7 and the riser sleeve 1.

[0023] The flange seating ring 8 comprises a flange seating ring body 81 and a plurality of snap-fit ​​parts 82 . The flange seating ring body 81 is fixedly connected to the small flange 7 of the water-blocking casing. The snap-fit ​​parts 82 are all arranged on the upper part of the outer ring of the flange seating ring body 81 .

[0024] The buckle portion 82 includes a slot group, a block group and a limit group. The slot group includes a slot 821 and a cavity 827 . The block group includes two blocks 822 , a baffle 824 and a vertical block 825 . The limit group includes a movable plate 823 , a buffer block 826 and a spring sheet 828 .

[0025] The slot 821 is located at the upper outer portion of the flange seating ring 81 , the baffle 824 is located at the bottom of the slot 821 , and the vertical block 825 is located at the inner lower portion of the slot 821 and is fixedly connected to the baffle 824 and the flange seating ring 81 .

[0026] The movable plate 823 is located on the inner side above the slot 821 and is rotatably connected to the top of the flange seating ring 81. The spring sheet 828 is located above the slot 827. One end of the spring sheet 828 is fixedly connected to the outer side of the flange seating ring 81, and the other end rests against the inner surface of the movable plate 823. The buffer block 826 is fixedly arranged at the lower end of the inner surface of the movable plate 823. The stop blocks 822 are respectively arranged on both sides of the slot 821 and are fixedly connected to the flange seating ring 81.

[0027] The lifting flange 3 includes a lifting flange plate 31, a plurality of clamping blocks 32, a plurality of screw holes 33 and four lifting rings 34. The clamping blocks 32 are all fixed on the inner surface of the lifting flange plate 31 and correspond to the buckle parts 82. The screw holes 33 are all vertically penetrated on the lifting flange plate 31. The lifting rings 34 are all fixed on the outer surface of the lifting flange plate 31.

[0028] At least eight I-beam openings 6 are provided on the I-beam support rod 4, and the I-beam openings 6 are divided into upper and lower layers. The upper I-beam openings 6 are respectively located at the four corners at both ends above the side wings of the I-beam support rod 4, and the lower I-beam openings 6 are respectively located at the four corners at both ends below the side wings of the I-beam support rod 4. There are at least four slings 5.

[0029] Press the lifting flange 3 downward to align the clamping block 32 with the buckle portion 82 respectively, and continue to press the lifting flange 3 downward. The clamping block 32 enters the clamping groove 821 and squeezes the movable plate 823. The movable plate 823 turns around its top end to the inner side of the flange seating ring body 81, and the spring sheet 828 is pressed down. When the buffer block 826 is squeezed to the surface of the flange seating ring body 81, the rubber buffer block 826 begins to deform, absorbing part of the pressure of the movable plate 823 on the flange seating ring body 81 to prevent the flange seating ring body 81 from being crushed. When the top of the clamping block 32 moves to the bottom of the movable plate 823, the spring sheet 828 rebounds, pushing the movable plate 823 to turn to the outside of the flange seating ring body 81 On the side, when the outer surface of the movable plate 823 rotates to the bottom of the stop block 822, it is blocked by the stop block 822 and stops rotating. The stop block 822 limits the movable plate 823 to rotate within a characteristic angle to prevent the movable plate 823 from rotating too much and affecting the downward movement of the block 32. After the movable plate 823 is popped up, it is pressed on the upper surface of the block 32. The movable plate 823 and the baffle 824 fix the block 32 in the groove 821, thereby positioning the lifting flange 3 on the flange seating ring 8. At this time, the screw holes 33 of the flange seating ring 8 and the screw holes 33 of the small flange 7 of the watertight casing correspond one by one. Insert the bolts into the corresponding screw holes 33 and tighten them to complete the installation of the lifting flange 3 on the watertight casing 1.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An efficient installation method for underwater waterproof casing flange, characterized in that: The steps include: Step 1: insert one end of one of the slings (5) into the I-beam opening (6) at the left end of the upper front side of the I-beam support rod (4) and fix it, and insert the other end into the I-beam opening (6) at the right end of the upper front side of the I-beam support rod (4) and fix it; Step 2: insert one end of another sling (5) into the I-beam opening (6) at the left end of the upper rear side of the I-beam support rod (4) and fix it, and insert the other end into the I-beam opening (6) at the right end of the upper rear side of the I-beam support rod (4) and fix it; Step 3: gather the middle parts of the two slings (5) to the middle part above the I-beam support rod (4) and hang them on the floating hook head; Step 4: Pass one end of a sling (5) through the I-beam opening (6) at the lower left end of the I-beam support rod (4) in sequence, and then fix the two ends of the sling (5) to the lifting rings (34) respectively; Step 5: Pass one end of another sling (5) through the I-beam opening (6) at the lower right end of the I-beam support rod (4), and then fix the two ends of the sling (5) to the lifting rings (34) respectively; Step 6: Use the lifting equipment to drive the floating hook head to move, lift the lifting flange (3) to the predetermined position, and then put it underwater; Step 7: The diver goes into the water, assists the floating hook head to move, puts the lifting flange (3) on the watertight casing (1), and moves it downward along the watertight casing (1) to above the small flange (7) of the watertight casing and the flange seating ring (8); Step 8: Align the clamping blocks (32) with the clamping grooves (821) respectively, press the lifting flange (3) downward, the clamping block (32) squeezes the movable plate (823), so that the movable plate (823) rotates around its top into the clamping cavity (827), the clamping block (32) continues to move downward to the bottom of the movable plate (823), the movable plate (823) is bounced up by the spring sheet (828), and pressed on the upper surface of the clamping block (32), and the lifting flange (3) is restricted on the flange positioning ring (8); Step 9: Insert the bolts through the screw holes (33) of the lifting flange (3) and the small flange of the waterproof casing (7) in sequence and tighten them to fix the lifting flange (3) and the small flange of the waterproof casing (7) together.

2. The method for efficiently installing an underwater waterproof casing flange according to claim 1 is characterized in that: The waterproof casing (1) is provided with a base plate (2) and a positioning portion, and the base plate (2) is located below the positioning portion.

3. The method for efficiently installing an underwater waterproof casing flange according to claim 2 is characterized in that: The base plate (2) comprises an inner tube, a base plate flange (10), a sleeve guide (11) and a plurality of reinforcing ribs (12); the base plate flange (10) and the sleeve guide (11) are both fixedly sleeved on the outer ring of the inner tube; the base plate flange (10) is located above the sleeve guide (11); the upper ends of the reinforcing ribs (12) are both fixedly connected to the bottom surface of the base plate flange (10), and the side surfaces are both fixedly connected to the inner tube.

4. The method for efficiently installing an underwater waterproof casing flange according to claim 2 is characterized in that: The positioning part includes a small flange of the watertight casing (7), a flange positioning ring (8) and a plurality of triangular ribs (9). The small flange of the watertight casing (7) is fixedly sleeved on the outer ring of the watertight casing (1), the flange positioning ring (8) is fixedly arranged above the small flange of the watertight casing (7), and the top ends of the triangular ribs (9) are fixedly connected to the lower surface of the small flange of the watertight casing (7), and the sides are fixedly connected to the outer surface of the watertight casing (1).

5. The method for efficiently installing an underwater waterproof casing flange according to claim 4 is characterized in that: The flange seating ring (8) comprises a flange seating ring body (81) and a plurality of snap-on parts (82). The flange seating ring body (81) is fixedly connected to the small flange (7) of the water-blocking casing, and the snap-on parts (82) are all arranged on the upper part of the outer ring of the flange seating ring body (81).

6. The method for efficiently installing an underwater waterproof casing flange according to claim 5, characterized in that: The buckle portion (82) comprises a slot group, a block group and a limit group, the slot group comprises a slot (821) and a slot cavity (827), the block group comprises two block blocks (822), a baffle (824) and a vertical block (825), and the limit group comprises a movable plate (823), a buffer block (826) and a spring sheet (828).

7. The method for efficiently installing an underwater waterproof casing flange according to claim 6, characterized in that: The clamping groove (821) is located at the upper outer part of the flange seating ring body (81), the baffle plate (824) is located at the bottom of the clamping groove (821), and the vertical block (825) is located at the inner lower part of the clamping groove (821) and is fixedly connected to both the baffle plate (824) and the flange seating ring body (81).

8. The method for efficiently installing an underwater waterproof casing flange according to claim 6, characterized in that: The movable plate (823) is located on the inner side above the slot (821) and is rotatably connected to the top of the flange seating ring (81). The spring sheet (828) is located above the slot cavity (827). One end of the spring sheet (828) is fixedly connected to the outer side of the flange seating ring (81), and the other end abuts against the inner surface of the movable plate (823). The buffer block (826) is fixedly arranged at the lower end of the inner surface of the movable plate (823). The stop blocks (822) are respectively arranged on both sides of the slot (821) and are fixedly connected to the flange seating ring (81).

9. The method for efficiently installing an underwater waterproof casing flange according to claim 1, characterized in that: The lifting flange (3) comprises a lifting flange (31), a plurality of clamping blocks (32), a plurality of screw holes (33) and four lifting rings (34); the clamping blocks (32) are fixedly arranged on the inner surface of the lifting flange (31) and correspond to the buckle parts (82); the screw holes (33) are vertically penetrated on the lifting flange (31); and the lifting rings (34) are fixedly arranged on the outer surface of the lifting flange (31).

10. The method for efficiently installing an underwater waterproof casing flange according to claim 1, characterized in that: At least eight I-beam openings (6) are provided through the I-beam support rod (4), and the I-beam openings (6) are divided into upper and lower layers, the upper I-beam openings (6) are respectively located at the four corners at the upper ends of the side wings of the I-beam support rod (4), and the lower I-beam openings (6) are respectively located at the four corners at the lower ends of the side wings of the I-beam support rod (4), and there are at least four slings (5).

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