CN216892420U - High sealing reliability is packer under water - Google Patents

Abstract

The utility model provides an underwater packer with high sealing reliability, which comprises an annular sealing bag, a turning plate assembly, a pressing and holding component, a traction component and a grouting pipeline, wherein the turning plate assembly is connected outside the annular sealing bag through annular cloth; the turning plate component comprises a turning plate and a wing plate connected to one side of the turning plate, and a rubber layer is vulcanized and bonded on the surfaces of the turning plate and the wing plate; after grouting, the annular sealing bag presses the turning plate assembly to turn over and plug the annular gap, and the wing plate plugs the gap between the adjacent turning plates. According to the underwater packer with high sealing reliability, the rubber layers are vulcanized and bonded on the surfaces of the turning plates and the wing plates, so that the tops of the turning plates and the wing plates are in flexible contact with the outer wall of the sleeve or the inner wall of the outer pile, adjacent turning plate assemblies are in flexible contact, the bottom ends of the turning plate assemblies are in flexible contact with the upper surface of the annular supporting plate, and the top ends of the turning plate assemblies are in flexible contact with the inner wall of the outer pile, so that the sealing performance of the underwater packer is greatly improved, slurry leakage can be effectively prevented, and a secondary sealing guarantee is provided for the annular sealing bag.

Description

High sealing reliability is packer under water

Technical Field

The utility model relates to the technical field of underwater packers, in particular to an underwater packer with high sealing reliability.

Background

Offshore fixed platforms are typically comprised of an upper block and a lower jacket. The jacket provides support to the upper block. The fixing structure of the conduit frame on the seabed is as follows: the sleeve is fixedly connected to the bottom of the main leg of the jacket, the sleeve is fixed by the steel pile driven into the sea bottom, and the sleeve and the steel pile are fixed through cement paste poured between the sleeve and the steel pile.

The main functions of the marine underwater packer are two: 1) when grouting is carried out after piling is finished, plugging an annular space between the inner diameter surface of the sleeve and the outer diameter surface of the steel pile at the bottom of the sleeve to prevent cement paste from flowing out; 2) for soft soil seabed surface, a packer or a matched device is needed to prevent the soft soil mud on the seabed from entering an annular space between the outer diameter of the steel pile and the inner diameter of the sleeve in the piling process, so as to ensure that cement paste is not polluted.

Currently, underwater packers used offshore for jacket installation are classified into two types, active packers and passive packers, according to the type of operation. The traditional active packer mainly adopts an inflatable packer, and the inflatable packer has the advantages that: during the process of inserting, setting and piling the steel pile, the inflatable packer is in an uninflated state, the inner surface of the inflatable packer is not in contact with the outer surface of the steel pile, and the inflatable packer is inflated through an air inlet pipeline only before grouting so as to achieve the aim of plugging cement paste. The weight of the cement paste (the height of the grouting cement column) and the water depth are not limited; the possibility of allowing an upward movement of the sleeve (when the jacket is subjected to offshore levelling operations) and a moderate eccentricity of the steel pile; the vertical impact load of the steel pile caused by the vertical movement of the offshore crane in the stormy waves in the pile discharging process can be borne or avoided. But the disadvantages are: the system is complex, needs to be equipped with a power station, a high-pressure pipeline, an ROV (underwater robot) emergency interface and a matching device (such as a horizontal rubber ring) for preventing soft soil mud at the seabed from entering an annular space between the outer diameter of the steel pile and the inner surface of the sleeve during the piling process so as to ensure that the cement paste is not polluted. The need to use an ROV to connect hoses subsea once the pipeline is damaged; the land installation and debugging workload is large, the cost is high, and the offshore operation is complex and the cost is high; a large amount of residual hardware consumes the anode, and the existence of a high-voltage pipeline jeopardizes underwater operation of divers; the cost is high, and is usually several times higher than the price of the passive packer.

The passive packers mainly include mechanical packers and Crux packers. The passive packer has the advantages that: high-pressure pipelines, power systems, valve installation and underwater ROV standby systems are not needed; land debugging and offshore operation are not required; simultaneously, the function of blocking mud from entering the annular space is achieved (one of two required functions of the isolator); there is essentially no residual hardware consuming anodes, and there are no various lines and valves that jeopardize the diver's underwater operation; the land installation and debugging work can be finished in a manufacturer, so the cost is low; the overall price is cheap. The defects mainly comprise: the damage rate is higher than that of an active packer, and when the active packer is used for a deepwater jacket, the cost for repairing the damaged packer is very high. The application is limited by the depth of the water, especially mechanical packers. The main reasons for the easy breakage are: the vertical impact generated by the rapid falling of the steel pile or the vertical movement of the offshore crane in the stormy waves can cause the damage and the failure of the rubber part of the packer due to the sharp right angle on the outer surface of the bottom of the steel pile.

All underwater packers need to finish plugging the slurry in the grouting process by means of external force. The effective blocking of the mud can be realized by means of external force in different forms and aiming at gaps with different sizes, and the effective blocking is a core element which is used by all underwater packers to represent self functions. For the active inflatable packer, the external force by which it is assisted is: and high-pressure air is injected into each packer through an underwater pipeline by an air compressor arranged at the top of the conduit frame to complete the plugging of grouting. In the inflating process, the inflatable packer can automatically deform to realize the plugging of slurry aiming at gaps with different sizes.

The passive mechanical packer adopts an external force mode as follows: during the process of inserting and piling the steel pile into the sleeve and the pile, the steel pile horizontally extrudes the rubber ring fixed on the inner diameter surface of the sleeve and the bent steel bar bonded with the rubber ring through vulcanization. These rubber restoring forces due to horizontal squeezing are relied upon as plugging forces against the grout during grouting. Since mechanical packers are generally only suitable for shallow water jacket installations, the facing clearances are relatively small. In the practical application of the mechanical packer, an annular rubber ring (the inner diameter of which is smaller than the outer diameter of the steel pile and is positioned below a gap block) fixed on the inner diameter surface of a sleeve is easy to fail due to the damage of the sharp right angle of the outer surface of the bottom of the steel pile in the pile inserting and piling processes. Due to the structural design defects of the mechanical packer, the overall damage ratio of the mechanical packer in practical application is high, and the mechanical packer is only suitable for shallow water pipe jackets and steel piles with small diameters.

The passive Crux packer adopts an external force mode as follows: a rubber ring horizontally arranged and positioned below the gap block; the front part of the rubber ring is connected with a large-diameter circular ring (the circle center is added with flexible reinforcing materials), and the inner diameter of the circular ring is smaller than the outer diameter of the steel pile; the rear annular structure is constrained by an annular restraining structure fixed on the inner diameter surface of the sleeve. The bottom of the steel pile passes through the circular ring during pile insertion, and the rubber ring horizontally arranged in the prior art is squeezed and transformed into the rubber ring arranged in the vertical direction. After the steel pile passes through the circular ring, the expansion of the inner diameter of the circular ring enables the circular ring to be tightly attached to the surface of the outer diameter of the steel pile, so that the effect of blocking mud from entering the annular space is achieved. Meanwhile, the elastic restoring force generated by the rubber ring extruded into a vertical state forms the plugging force to cement paste in the grouting process. When the packer is used for deepwater jacket installation, the outer diameter surface of the steel pile is usually provided with equally spaced shear keys, and the shear keys are welded on the outer diameter surface of the steel pile by using reinforcing bars for enhancing the shear resistance of cement in the vertical direction. The circular ring of the Crux packer must allow the passage of the steel piles in which the shear keys are installed. The structural design of the Crux packer has the following disadvantages: the horizontally arranged rubber ring is easily scratched or damaged by the sharp right angle on the outer surface of the bottom of the steel pile in the pile inserting process. The offshore jacket installation statistics show that: the overall failure rate of the Crux packer is higher than the inflatable packer.

In summary, various packers must rely on external forces of different forms to complete the plugging function of cement slurry in the grouting process. The traditional inflatable packer or passive packer widely applied in the market at present has the defects of different forms. Therefore, there is a need for a new passive packer that can block cement slurry during grouting by an external force different from the above-mentioned one, and that can be used at a lower breakage rate than the above-mentioned conventional inflatable packer.

U.S. patent No. 9,677,241, inventor James Lee, chinese name: the Li Jun firstly provides a novel passive packer in 2014 8, and the external force of the passive packer depends on the gravity of cement paste. The design principle of the utility model is as follows: the annular rubber bag is filled in the grouting process, and the pressure difference between the pressure generated by the gravity of cement paste (specific gravity: 1.92g/cm3) in the cavity and the pressure generated by the gravity of seawater outside the cavity of the annular rubber bag (specific gravity: 1.05g/cm3) is used as an external force to realize the plugging of the cement paste in the grouting process. Because the cement paste is liquid in the grouting process, the pressure difference can generate pressure in the vertical direction and also generate pressure with the same size as the pressure in the vertical direction in the horizontal direction. The vertical force is transmitted to the connecting piece arranged on the inner diameter surface of the sleeve through the side rubber layer of the annular rubber bag, and the horizontal force forms the plugging force to cement paste in the grouting process through the positive pressure between the inner side surface of the annular rubber bag and the outer surface of the steel pile. With the increase of the pressure difference (the height of the cement column), the sealing effect of the inner surface of the annular rubber bag to the outer surface of the steel pile is improved. The plugging function in the grouting process is similar to the form of the traditional inflatable packer, but the external force is different. For example, if the diameter of the steel pile is 2.13 meters and the underwater height of the cement column is 12 meters, the plugging pressure of the inner surface acting in the cavity (with the height of 0.4 meter) of the annular rubber bag to the outer surface of the steel pile is more than 20 tons.

The annular rubber bags mentioned by the novel passive packer all have the following basic characteristics: the annular rubber bag is coaxial with the outer steel sleeve; the bottoms of the plurality of rubber belts added with the fiber reinforced material are connected with the top of the annular rubber bag; the top of each rubber belt is connected with a corresponding fixing piece arranged on the inner diameter surface of the sleeve; the gaps among the rubber belts provide channels for cement slurry to enter the cavity of the annular rubber bag; the middle part of the annular rubber bag is an annular rubber sleeve which is added with fiber reinforced material and has the inner diameter slightly smaller than the diameter of the steel pile; the connecting section of the rubber sleeve and the rubber belt is a conical rubber layer; the bottom of the annular rubber bag is connected with a sealing structure which is fixed on the surface of the inner diameter of the sleeve near the bottom, and a sealed cement paste accommodating cavity is formed between the inner diameter of the sleeve and the outer diameter of the steel pile.

In the patent successor to the new passive packer us patent mentioned above, us patent No. 9,970,171, inventor James Lee, chinese name, in 5 months 2017: the Lijun proposes two improved methods: 1) a horizontal annular bottom supporting plate or a cone-shaped bottom supporting plate fixed on the inner diameter surface of the sleeve is additionally arranged below the sealing structure at the bottom of the annular rubber bag. The horizontal annular backing plate functions to reduce the radial width of the gap and to support a portion of the vertical gravity with the annular backing plate to reduce the load that the vertical gravity bears on the annular rubber bag side rubber layer and the connecting member on the sleeve inner diameter surface. The cone-shaped bottom supporting plate can play a similar function of a horizontal annular bottom supporting plate, and can also cooperate with the bottom structure of the annular rubber bag to block the gap. The function of blocking the gap creates a brand new method for blocking cement paste in the grouting process, and can improve the reliability of the system in the aspect of cement paste blocking; because of the existence of the horizontal annular bottom supporting plate or the cone-shaped bottom supporting plate, the load of the side rubber layer and the bottom rubber layer of the annular rubber bag can be greatly reduced, and the thickness of the side rubber layer and the thickness of the bottom rubber layer of the annular rubber bag can be correspondingly and greatly reduced. However, the thin rubber layer with reduced thickness may bulge and deform greatly after being loaded by cement slurry at the top of the gap, and local stress concentration may occur, thereby easily causing damage to the thin rubber layer. The improvement is that a thickened rubber ring is added at the surface position of the thin rubber layer at the top of the gap, and the locally reinforced design can reduce the bulging and deformation of the gap section, thereby reducing the possibility of breakage. With the two improved inventions, the total weight of the annular rubber bag can be greatly reduced. The reduction of the total weight of the annular rubber bag not only can reduce the manufacturing cost, but also is convenient for transportation and field installation. In addition, the rubber ring which is locally thickened at the top of the gap can be combined with the cone-shaped bottom supporting plate to generate a function of blocking the gap, so that the reliability of the system for blocking cement slurry is further improved (an independent double-safety blocking packer is formed).

The annular rubber bag mentioned by the novel passive packer or the improved passive packer needs to have three basic functions: 1) the inner diameter of the annular rubber bag must be smaller than the diameter of the steel pile to prevent soft soil mud from the sea bottom from entering the annular space between the outer diameter of the steel pile and the inner diameter of the sleeve during pile driving, at the expense of the inner surface of the annular rubber bag having to be in contact with the outer surface of the steel pile, in particular the sharp right angle of the outer surface of the bottom of the steel pile, during insertion, pile lowering and pile driving of the steel pile; 2) the traditional rubber layer and the fixed connection parts on the inner surface of the sleeve must bear the main gravity of cement paste; 3) at the top of the gap, it must assume not only the structural support function across the gap under pressure, but also the grout sealing function for a certain gap size.

Jacket offshore installations have been in the past 60 years old and experienced. The size of the gap between the sleeve at the bottom of the deepwater jacket and the steel pile is standardized. Most steel piles used in deepwater jackets are around 2 meters in diameter, within the diameter of the corresponding sleeve. The radial width of the gap block is 50mm in the traditional design, and the maximum allowable eccentricity of the steel pile is also 50 mm. If a horizontal annular bottom support plate with the width of 40mm is adopted (the radial width of the annular bottom support plate must be smaller than the width of the gap block), the designed gap which must be blocked at the bottom of the annular rubber bag of the packer is 60mm (the maximum gap is 50mm +50mm-40 mm). A gap of this size is adequate with the improved passive packer described above.

The installation of offshore wind turbines is a new industry that has recently developed. Offshore wind turbines are generally composed of an upper and a lower part: the upper part is a blade and motor part; the lower part is a supporting structure, and the lower part supporting structure usually adopts a structure of a single steel pile or a plurality of steel piles with large diameter. When a multi-steel-pile structure is adopted, the respective piling operation of a plurality of steel piles is usually completed firstly, then the steel piles are used as sleeves for inserting the bottom vertical sections of a plurality of main legs of a fan support during offshore operation (the bottoms of the sleeves are driven into the sea bottom, and the tops of the sleeves are higher than the horizontal plane), meanwhile, an underwater packer is arranged at the lower parts of the bottom vertical sections of the main legs, and a grouting pipeline system is arranged on the surface of the inner diameter of the bottom of the main legs. Because the piling of the steel piles is independently finished, the precision control of the distance between the steel piles is limited, and the generated distance error is larger, so that the requirement on the treatment capacity of the packer gap is correspondingly larger. The offshore wind turbine is usually installed in a shallow sea area, and the storm during offshore installation operation is very small.

The underwater packer for installing the fan has the clearance requirement of possibly 120-300 mm. In the face of such large gaps, the above passive packers based on the annular rubber bag bottom structure (adding fiber reinforcement to reinforce the structural strength of the rubber layer) are insufficient. The major challenge faced by subsea packers for offshore installation of wind turbines is the above-mentioned oversized clearance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to disclose an underwater packer with high sealing reliability, which can block gaps with any size; the wing plates can block the gaps between the adjacent turning plates, so that the annular sealing bag is prevented from falling from the gaps between the adjacent turning plates, the bearing capacity of the annular sealing bag is improved, the sealing effect is good, slurry leakage is avoided, in addition, during grouting, the annular sealing bag presses one of the turning plate assemblies to overturn, other turning plate assemblies can be sequentially and actively opened, just like lotus flowers, the annular sealing bag does not need to be pressed in turn, the stress is uniform, and the bearing preparation can be prepared in advance; the rubber layer is vulcanized and bonded on the surfaces of the turning plates and the wing plates, so that the turning plates and the wing plates are in flexible contact, the adjacent turning plate assemblies are in flexible contact, the bottom ends of the turning plate assemblies and the annular supporting plate are in flexible contact, the top ends of the turning plate assemblies and the inner wall of the outer pile are in flexible contact, the sealing performance of the underwater packer is greatly improved, slurry leakage can be effectively prevented, and secondary guarantee is provided for the annular sealing bag.

In order to achieve the purpose, the utility model provides an underwater packer with high sealing reliability, which comprises an outer pile and a sleeve arranged in the outer pile, wherein the outer pile and the sleeve form an annular gap; the high-sealing-reliability underwater packer comprises an annular sealing bag, a plurality of flap assemblies, a pressing and holding component, a traction component and a grouting pipeline, wherein the flap assemblies are connected outside the annular sealing bag in an annular manner; the outer side of the annular sealing bag is pulled by a pulling part, the inner side of the annular sealing bag is pressed and held by a pressing part to form bottom sealing of the sealing bag, and the outlet of the grouting pipeline is connected with the inlet of the annular sealing bag; the pressing and holding component and the pulling component are connected to the outer wall of the sleeve or the inner wall of the outer pile; the flap plate assembly comprises a flap plate and a wing plate connected to one side of the flap plate, and the wing plate is attached to the other side of the adjacent flap plate; rubber layers are vulcanized and bonded on the surfaces of the turning plate and the wing plate; after grouting, the annular sealing bag presses the turning plate assembly to turn over and plug the annular gap, and the wing plate plugs the gap between the adjacent turning plates.

In some embodiments, the flap is attached inboard of a flap, the flap being attached inboard of an adjacent flap.

In some embodiments, the turning plate and the wing plate are both curved, the top end of the turning plate is provided with a rubber rod, and the top end of the wing plate is provided with an elastic sealing strip.

In some embodiments, the steel wire ring is arranged on the bottom of each turning plate, and the steel wire ring sequentially penetrates through the steel hole seats on each turning plate.

In some embodiments, the pressing and holding component comprises an annular supporting plate, an annular lower plate connected to the annular supporting plate, a first stud connected to the annular lower plate, an annular upper plate sleeved on the first stud and pressed with the annular lower plate, and a first nut screwed on the first stud and pressing the annular upper plate; the annular sealing bag is sleeved on the first stud and is pressed and held by the annular upper plate and the annular lower plate together, and the annular supporting plate is connected to the outer wall of the sleeve or the inner wall of the outer pile.

In some embodiments, the inner side edge of the annular sealing bag is provided with an annular strip, and the annular strip is tightly attached to the outer wall of the sleeve or the inner wall of the outer pile.

In some embodiments, the first steel ring is sleeved on the first stud and presses and holds the annular sealing bag, and the first steel ring is pressed and held by the annular upper plate and the annular lower plate together.

In some embodiments, the annular upper plate and the annular lower plate press-fit surface are concave-convex matched to form high sealing performance.

In some embodiments, the pulling member comprises a plurality of second steel rings, a plurality of nylon cords, a plurality of third steel rings; the second steel loop is connected on the sleeve outer wall or on the outer pile inner wall, the nylon rope top is connected on the second steel loop, the third steel loop is installed on annular sealing bag, the nylon rope bottom is connected on the third steel loop.

In some embodiments, the annular sealing bag is formed by folding a strip-shaped bag piece, and two ends of the strip-shaped bag piece are connected through a zipper.

Compared with the prior art, the utility model has the beneficial effects that: firstly, gaps with any size can be plugged; the wing plates can block the gaps between the adjacent turning plates, so that the annular sealing bag is prevented from falling from the gaps between the adjacent turning plates, the bearing capacity of the annular sealing bag is improved, the sealing effect is good, slurry leakage is avoided, in addition, during grouting, the annular sealing bag presses one turning plate assembly to turn over, other turning plate assemblies can be sequentially and actively opened, the annular sealing bag is not required to be pressed one by one like lotus flowers, the stress is uniform, and bearing preparation can be prepared in advance; the rubber layer is vulcanized and bonded on the surfaces of the turning plates and the wing plates, so that the turning plates and the wing plates are in flexible contact, the adjacent turning plate assemblies are in flexible contact, the bottom ends of the turning plate assemblies and the annular supporting plate are in flexible contact, the top ends of the turning plate assemblies and the inner wall of the outer pile are in flexible contact, the sealing performance of the underwater packer is greatly improved, slurry leakage can be effectively prevented, and secondary guarantee is provided for the annular sealing bag.

Drawings

FIG. 1 is a schematic structural diagram of a high sealing reliability underwater packer in an unsized state according to the present invention;

FIG. 2 is a schematic structural diagram of the high sealing reliability underwater packer of the present invention after grouting;

FIG. 3 is a schematic structural diagram of another embodiment of the underwater packer with high sealing reliability in an un-grouted state, according to the utility model;

FIG. 4 is a schematic structural diagram of another embodiment of the underwater packer with high sealing reliability after grouting;

FIG. 5 is a schematic view of the pressing member according to the present invention;

FIG. 6 is a schematic view of the construction of the tension member of the present invention;

FIG. 7 is a schematic view of the construction of the annular sealed bag of the present invention;

FIG. 8 is a schematic structural view of the flap assembly of the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic structural view of the flap of the present invention;

FIG. 11 is a schematic view of the installation configuration of the flap assembly of the present invention (closed before grouting);

FIG. 12 is a schematic view of the installation configuration of the flap assembly of the present invention (open after grouting);

fig. 13 is a schematic structural view of another flap assembly of the present invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

1-12, the underwater packer with high sealing reliability comprises an outer pile 1 and a sleeve 2 arranged in the outer pile 1, wherein an annular gap 8 is formed between the inner wall of the outer pile 1 and the outer wall of the sleeve 2. The bottom end of the external pile 1 is inserted into a sea bottom line b, and the top ends of the external pile 1 and the sleeve 2 exceed a sea level a.

The high seal reliability underwater packer is installed in the annular gap 8. The use of the high seal reliability underwater packer is not limited by the size of the annular gap 8, and the sleeve 2 can be inserted into the outer pile 1 from any position, namely, the central line of the outer pile 1 and the central line of the sleeve 2 can be overlapped or not overlapped.

The high-sealing-reliability underwater packer comprises an annular sealing bag 3, a plurality of flap assemblies connected outside the annular sealing bag 3 in an annular cloth mode, a pressing and holding component 5, a traction component 4 and a grouting pipeline 7. The pressing and holding part 5 can be horizontally sealed, and the drawing part 4 is elastically drawn.

The pressing and holding part 5 and the pulling part 4 are connected on the outer wall of the sleeve 2 or the inner wall of the outer pile 1. Specifically, when the high-sealing-reliability underwater packer is used for offshore installation of a wind turbine, as shown in fig. 1 and 2, the pressing and holding part 5 and the pulling part 4 are connected to the outer wall of the sleeve 2, and when the high-sealing-reliability underwater packer is used for offshore installation of a jacket, as shown in fig. 3 and 4, the pressing and holding part 5 and the pulling part 4 are connected to the inner wall of the outer pile 1, the working principle of the two installation modes is the same, and for avoiding redundancy, in this embodiment, the installation mode that the pressing and holding part 5 and the pulling part 4 are connected to the outer wall of the sleeve 2 is specifically described.

The bottom end of the sleeve 2 is provided with a conical plug 21, the plug 21 is provided with an annular rubber cleaning plate 22, and the annular rubber cleaning plate 22 is attached to the inner wall of the outer pile 1 and used for cleaning the inner wall of the outer pile 1 in advance.

As shown in fig. 7, the annular sealing bag 3 is formed by folding a strip-shaped bag sheet 30, the annular sealing bag 3 is similar to an annular bag-shaped bag, and two ends of the strip-shaped bag sheet 30 are connected by a waterproof zipper and sealed by sealant, so that slurry leakage is prevented. A plurality of third steel rings 33 are arranged on the upper edge of the strip-shaped bag sheet 30, namely the outer side edge 31 of the annular sealing bag 3, and an annular strip 34 is arranged on the lower edge of the strip-shaped bag sheet 30, namely the inner side edge 32 of the annular sealing bag 3.

As shown in fig. 8-12, the flap assemblies are evenly spaced around the annular sealed bag 3. The flap assembly comprises a flap 6 and a wing plate 63 connected to one side of the flap 6. The wing plate 63 is connected to the inner side of the turning plate 6, and specifically, the turning plate 6 and the wing plate 63 are connected through bolts and nuts.

The wing plate 63 is attached to the other side of the adjacent turning plate 6, and specifically, the wing plate 63 is attached to the inner side of the adjacent turning plate 6. The turning plate 6 and the wing plate 63 are both curved, so that the annular sealing bag 3 is convenient to enclose.

The bottom end of the flap assembly abuts at the junction of the annular support plate 51 and the annular lower plate 52. Still include steel wire winding 65, turn over the board 6 bottom and be equipped with steel hole seat 64, steel wire winding 65 passes steel hole seat 64 on every turns over board 6 in proper order, plays the effect of fixed board subassembly bottom position that turns over, makes to turn over board subassembly bottom butt all the time at annular backup pad 51 and annular hypoplastron 52 juncture, makes to turn over the board subassembly and uses this juncture to rotate as the fulcrum, and the back of the grout, turns over the board subassembly upset, steel hole seat 64 around steel wire winding 65 rotate can.

After grouting, the annular sealing bag 3 presses the turning plate assembly to turn over and plug the annular gap 8, and the wing plates 63 plug the gap between the adjacent turning plates 6, so that on one hand, the annular sealing bag 3 is prevented from falling from the gap between the adjacent turning plates 6, the bearing capacity of the annular sealing bag 3 is improved, the sealing effect is good, and slurry leakage is avoided; on the other hand, when grouting, the annular sealing bag 3 presses one of the turning plate assemblies to turn, and other turning plate assemblies can be sequentially and actively opened just like lotus flowers, so that the annular sealing bag 3 does not need to be pressed one by one, the stress is uniform, and bearing preparation can be prepared in advance.

The turnover plate 6 is connected with a plurality of reinforcing plates 62, so that the bearing capacity of the turnover plate 6 is further improved, supporting force can be provided for the annular sealing bag 3, and the annular sealing bag 3 is prevented from dropping to cause slurry leakage. The novel sealing device further comprises a second bolt 61 and a second nut 610 screwed on the second bolt 61, wherein the second bolt 61 sequentially penetrates through the annular sealing bag 3 and the turning plate 6 and is matched with the second nut 610 to realize connection of the annular sealing bag 3 and the turning plate 6, so that the turning plate 6 and the annular sealing bag 3 can move synchronously. In addition, a sealing gasket is arranged on the second bolt 61 to play a role in sealing and prevent slurry leakage.

The turning plate component is made of an ultra-high molecular weight polyethylene material and has excellent performance. The rubber layer (not shown) is vulcanized and bonded on the surfaces of the turning plate 6 and the wing plate 63, so that the turning plate 6 and the wing plate 63 are in flexible contact, the adjacent turning plate components are in flexible contact, the bottom end of the turning plate component and the annular supporting plate 51 are in flexible contact, the top end of the turning plate component and the inner wall of the outer pile 1 are in flexible contact, the sealing performance of the turning plate component is greatly improved, slurry leakage can be effectively prevented, and secondary guarantee is provided for the annular sealing bag 3.

The outer side edge 31 of the annular sealing bag 3 is pulled by the pulling part 4, and the inner side edge 32 of the annular sealing bag 3 is pressed and held by the pressing and holding part 5, so that the annular sealing bag 3 is supported, the annular sealing bag 3 keeps a normal shape, the annular sealing bag is prevented from being paralyzed and softened, and grouting is facilitated.

As shown in fig. 5, the pressing member 5 includes an annular support plate 51, an annular lower plate 52 welded to the annular support plate 51, a plurality of first studs 53 uniformly connected to the annular lower plate 52 at intervals, an annular upper plate 55 sleeved on the first studs 53 and pressed with the annular lower plate 52, and a first nut 54 screwed on the first studs 53 and pressing the annular upper plate 55. The annular sealing bag 3 is sleeved on the first stud 53 and is jointly pressed and held by an annular upper plate 55 and an annular lower plate 52, and the annular support plate 51 is connected to the outer wall of the sleeve 2. The pressing surfaces of the annular upper plate 55 and the annular lower plate 52 are in concave-convex fit and staggered contact, so that accurate positioning is facilitated.

The inboard edge 32 of annular sealing bag 3 is equipped with annular strip 34, annular strip 34 and the inseparable laminating of sleeve 2 outer wall play sealed effect, prevent that annular sealing bag 3 and sleeve 2 outer wall clearance from leaking the thick liquid.

The sealing device further comprises a first steel ring 56 which is sleeved on the first stud 53 and presses and holds the annular sealing bag 3, the first steel ring 56 is pressed and held by the annular upper plate 55 and the annular lower plate 52, a sealing effect is achieved, and slurry leakage in a gap between the outer walls of the annular sealing bag 3 and the first stud 53 is prevented.

As shown in fig. 6, the pulling member 4 comprises a plurality of second steel rings 42, a plurality of nylon ropes 41 and a plurality of third steel rings 33. Second steel loop 42 connects on sleeve 2 outer wall and evenly encircles the cloth on sleeve 2 outer wall at the interval, nylon rope 41 top is connected on second steel loop 42, third steel loop 33 is installed on annular sealing bag 3, nylon rope 41 bottom is connected on third steel loop 33. The nylon string 41 has a certain elasticity, so that it is convenient to adapt to the state of the annular sealing bag 3.

The grouting line 7 is installed on the inner wall of the sleeve 2, and the outlet of the grouting line 7 is connected with the inlet of the annular sealing bag 3, so that grouting into the annular sealing bag 3 is facilitated. After grouting, the annular sealing bag 3 is pressed to turn over the board subassembly upset and shutoff annular clearance 8, specifically, turn over board subassembly bottom butt on the annular support plate 51, under the pressure of annular sealing bag 3 moves, turn over the board subassembly and use and turn over the board subassembly bottom and rotate as the outside stake 1 inner wall of fulcrum, finally, turn over board subassembly top and support the shutoff of outside stake 1 inner wall in order to realize annular clearance 8, annular sealing bag 3 part laminating outside stake 1 inner wall.

As shown in fig. 13, in order to achieve better sealing performance, the top end of the flap 6 may be further provided with a rubber rod 66, and the top end of the wing plate 63 is provided with an elastic sealing strip 631, and after the flap assembly is opened, the rubber rod 66 and the elastic sealing strip 631 form a good seal with the inner wall of the outer pile 1.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The high-sealing-reliability underwater packer is characterized by comprising an outer pile and a sleeve arranged in the outer pile, wherein the outer pile and the sleeve form an annular gap, and the high-sealing-reliability underwater packer is arranged in the annular gap;

the high-sealing-reliability underwater packer comprises an annular sealing bag, a plurality of flap assemblies, a pressing and holding component, a traction component and a grouting pipeline, wherein the flap assemblies are connected outside the annular sealing bag in an annular manner;

the outer side of the annular sealing bag is pulled by a pulling part, the inner side of the annular sealing bag is pressed and held by a pressing part to form bottom sealing of the sealing bag, and the outlet of the grouting pipeline is connected with the inlet of the annular sealing bag; the pressing and holding component and the pulling component are connected to the outer wall of the sleeve or the inner wall of the outer pile;

the flap plate assembly comprises a flap plate and a wing plate connected to one side of the flap plate, and the wing plate is attached to the other side of the adjacent flap plate; rubber layers are vulcanized and bonded on the surfaces of the turning plate and the wing plate;

after grouting, the annular sealing bag presses the turning plate assembly to turn over and plug the annular gap, and the wing plate plugs the gap between the adjacent turning plates.

2. The underwater packer with high sealing reliability as claimed in claim 1, wherein the wing plates are connected to the inner sides of the flaps, and the wing plates are attached to the inner sides of the adjacent flaps.

3. The underwater packer with high sealing reliability as claimed in claim 2, wherein the turning plate and the wing plate are both curved, the top end of the turning plate is provided with a rubber rod, and the top end of the wing plate is provided with an elastic sealing strip.

4. The underwater packer with high sealing reliability as claimed in claim 1, further comprising a bead ring, wherein the bottom of the turning plate is provided with a steel hole seat, and the bead ring sequentially passes through the steel hole seat on each turning plate.

5. The underwater packer with high sealing reliability as claimed in claim 1, wherein the pressing member comprises an annular support plate, an annular lower plate connected to the annular support plate, a first stud connected to the annular lower plate, an annular upper plate sleeved on the first stud and pressed with the annular lower plate, and a first nut screwed on the first stud and pressing the annular upper plate; the annular sealing bag is sleeved on the first stud and is pressed and held by the annular upper plate and the annular lower plate together, and the annular supporting plate is connected to the outer wall of the sleeve or the inner wall of the outer pile.

6. The underwater packer with high sealing reliability as claimed in claim 5, wherein the inner side of the annular sealing bag is provided with an annular strip, and the annular strip is tightly attached to the outer wall of the sleeve or the inner wall of the outer pile.

7. The underwater packer with high sealing reliability as claimed in claim 6, further comprising a first steel ring sleeved on the first stud and pressing and holding the annular sealing bag, wherein the first steel ring is pressed and held by the annular upper plate and the annular lower plate together.

8. The underwater packer with high sealing reliability as claimed in claim 7, wherein the pressing surface of the annular upper plate and the annular lower plate is concave-convex matched to form high sealing performance.

9. The underwater packer with high sealing reliability as claimed in claim 1, wherein the pulling member comprises a plurality of second steel rings, a plurality of nylon ropes, a plurality of third steel rings; the second steel loop is connected on the sleeve outer wall or on the outer pile inner wall, the nylon rope top is connected on the second steel loop, the third steel loop is installed on annular sealing bag, the nylon rope bottom is connected on the third steel loop.

10. The underwater packer with high sealing reliability as claimed in claim 1, wherein the annular sealing bag is formed by folding a strip-shaped bag piece, and both ends of the strip-shaped bag piece are connected by a zipper.

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