CN211693992U - An external plugging and reinforcing device for a submarine pipeline - Google Patents

Abstract

The utility model relates to an external plugging and reinforcing device for a submarine pipeline, which is applied to the underwater plugging and reinforcement of a submarine pipeline defect or a leak point pipe section, and is especially suitable for deep-water submarine pipelines. It is mainly composed of special bolts, right casing, clamping device, left casing, semi-sealing ring, guide sleeve, guide body, middle bolt, sealing strip and anode block; the right casing and left casing are connected by special bolts and The middle bolt forms a mechanical structure surrounding the original pipeline, the semi-sealing ring and the sealing strip form a sealed chamber, and the clamping device firmly fixes the device to the original pipeline. It has the characteristics of easy installation under water, not limited by water depth, permanent sealing and fixing of pipeline leakage points, low cost of offshore operation, etc. It is especially suitable for underwater emergency maintenance of deep-water submarine pipelines.

Description

An external plugging and reinforcing device for a submarine pipeline

technical field

The utility model relates to an external plugging and reinforcing device for submarine pipelines in the field of pipeline repairing devices, which is applied to the underwater plugging and reinforcing of defective or leaky pipe sections of submarine pipelines, and is especially suitable for deep-water submarine pipelines.

Background technique

Due to the influence of corrosion, external force and other factors, the submarine oil and gas pipelines in service may have defects or damage or even leaks in a certain position of the pipeline. It is necessary to plug the defects in this area of the pipeline. At present, most of the water welding is used. Or welded and plugged in the dry maintenance cabin.

Chinese patent CN102943942A discloses "A Novel Offshore Pipeline Leakage Plugging Device and Leakage Plugging Method", which includes a plugging jacket, a valve and a drainage pipeline, the plugging jacket is fixedly connected by bolts from the upper part and the lower part, and the plugging clamp The sleeve is provided with a blocking jacket outlet, a valve is set at the blocking jacket outlet, one end of the drainage pipeline is connected to the valve, and the other end is connected to the oil leakage recovery point; sealing ring. The leakage plugging method includes the following steps: Step 1. First, determine the exact position of the leakage point of the marine pipeline, and then use the water conservancy scour device to wash away the sediment at the lower part of the marine pipeline at the leakage point to form a space that can accommodate the lower part of the plugging jacket. Pit and groove; Step 2. Move the lower part of the pre-prepared blocking jacket suitable for the diameter of the marine pipeline into the pit, and then use thickened bolts to fasten the upper and lower parts of the blocking jacket to the outside of the marine pipeline to ensure that The sealing rings of the edge layers at both ends of the blocking jacket are closely attached to the outer wall of the marine pipeline to form a closed annular space; step 3, the oil leakage at the leakage point overflows through the valve, and the pressure of the oil leakage itself is used to drain the flow along the The pipeline reaches the oil leakage recovery point on the sea surface; Step 4, when the installation and debugging of the blocking jacket is completed, close the valve, retract the drainage pipeline, and leave the blocking jacket and valve at the leakage point to keep the pipeline running. In the utility model, because the blocking jacket will form a closed area after being connected and pressed, the oil leakage can only be recovered to the oil leakage recovery point through a channel of the valve and the drainage pipeline, and is not affected by the flow of seawater, and the recovery efficiency of oil leakage is compared with the current one. Technology has improved. After the construction is completed, the plugging jacket is left at the leak point and will not be retrieved again. After closing the valve, only the drainage pipe needs to be recovered. Therefore, the welding of the pipeline operation under water is avoided and the safety hazard of maintenance is reduced.

However, the utility model is only suitable for shallow water areas, and is difficult to achieve in deep water areas, and the strength of plugging is also difficult to meet the needs of high underwater strength.

Utility model content

The purpose of the utility model is to provide an external leakage plugging and reinforcing device for a submarine pipeline in view of the deficiencies of the prior art. The device has the characteristics of easy installation under water, not limited by water depth, reliable leakage point plugging, permanent sealing, and can be clamped to the original pipeline, etc. It is especially suitable for underwater emergency maintenance of submarine pipelines.

The technical scheme of the present utility model:

An external leakage plugging and reinforcing device for a submarine pipeline comprises a pair of left casings and right casings, a set of fastening bolts matched with the left casings and the right casings, a clamping device, a sealing strip, and a half-sealing ring ,in:

There are corresponding and identical semi-cylindrical grooves and semi-conical grooves respectively machined in the middle position between the mating surfaces of the right and left casings. Grooves and semi-conical grooves, semi-cylindrical grooves with original pipes, semi-cylindrical grooves with semi-sealing rings, semi-cylindrical grooves with original pipes, large semi-cylindrical grooves with original pipes, all stepped semi-cylindrical grooves at both ends The cylindrical groove and the conical groove are both symmetrical and have the same center line; on the outer side of the stepped semi-cylindrical groove and the conical groove, and on the joint surface of the right casing and the left casing, there are respectively provided sealing grooves matching with the sealing strips. The sum of the depths of the corresponding sealing grooves on the right casing and the left casing is less than the height of the sealing strip, and the ends of the two ends of the sealing groove are located in the middle of the semi-cylindrical groove where the semi-sealing ring is located; Two guide sleeves are symmetrically arranged on the upper part of the upper part, the guide sleeves cooperate with the guide body, and both the guide sleeve and the guide body are perpendicular to the centerline of the original pipeline; symmetrically inlaid half-cylindrical grooves in the corresponding semi-cylindrical grooves on the right shell and the left shell The ends of the sealing ring and the half sealing ring are all protruding from the joint surface of the right casing and the left casing; the sealing strips are respectively embedded in the sealing grooves on the right casing and the left casing, and the ends of the two ends of the sealing strip are respectively provided with The recesses matched with the half sealing ring are all interference fit; the clamping devices are arranged at both ends of the right casing and the left casing, respectively corresponding to the end faces, semi-cylindrical grooves and Half-tapered slot fit.

The above scheme further includes:

The clamping device includes a guide block, a wedge block, a spring, an end cover d, a lock lever, a lock shaft and a lever; wherein, the end cover d is a semicircular structure, which is matched with the right casing and the left casing and fixed at both ends thereof respectively. , the outer circular surface is processed into stepped large-diameter semi-cylindrical surface, semi-cylindrical surface, and semi-conical surface in turn. The corresponding semi-cylindrical grooves on the left shell are matched, the semi-conical surface is matched with the semi-conical grooves on the right and left shells, and the semi-cylindrical grooves are machined inside the end cover d to fit the original pipe clearance; the guide blocks are symmetrically fixed On the inner end face of the end cover d, and matched with the end face of the wedge block, the spring is arranged in the blind groove matched with the inner end face of the end cover d, and a cavity is machined to rotate with the locking rod; the lever is arranged on the outer end face of the end cover d The cavity for rotation fit; the wedge block is in the shape of a cone, the inner groove is provided with screw teeth and is matched with the original pipe, and the outer surface is in the shape of a cone body, which is matched with the semi-conical grooves corresponding to the right shell and the left shell, and the wedge block is in the shape of a cone. The tail end is provided with a cone-shaped tail, the outer surface of the tail is matched with the corresponding semi-conical grooves of the right casing and the left casing, the inner surface is matched with the semi-conical surface of the end cover d, and the end surface is matched with the stepped end face of the end cover d. Corresponding to the locking rod, the tail wing is provided with an arc-shaped groove for its rotation, the wedge block is provided with a blind groove matched with the spring, and the two sides of the wedge block are matched with the guide block and are parallel to the radial centerline of the wedge block.

Corresponding to the radial centerline position of the wedge block, a wedge block locking mechanism composed of a lock rod, a lock shaft and a dial rod is set up. rod; two or more springs and a set of wedge block locking mechanism are symmetrically arranged corresponding to each wedge block.

The four corners of the left housing are closely matched with the special-shaped bolts, and the four corners of the right housing are provided with stepped grooves corresponding to the special-shaped bolts. Fitting, small-diameter groove and special-shaped bolt screw part clearance fit; in the middle of the right casing and left casing, respectively set up a groove for clearance fit with the middle bolt; opposite to the joint surface of the right casing and the left casing, A plane parallel to the joint surface is arranged on the right housing, which is matched with the corresponding fixing nut surfaces of the special-shaped bolt and the middle bolt, and the fixing nut of the special-shaped bolt and the middle bolt is fixed on the right housing with screws. The anode block is set in the middle position of the anode block; opposite to the joint surface of the right shell and the left shell, a plane parallel to the joint surface is set on the left shell, which is matched with the corresponding movable nut surface of the special bolt and the middle bolt. The anode block is arranged in the middle of the surface.

Limiting rings are arranged at both ends of the guide body; when the right casing and the left casing are respectively in close contact with the limiting rings on the guide body, the special-shaped bolts fixed on the left casing and the ends of the screw rods of the middle bolts are in contact with each other. The distance between the joint surfaces of the right shell is greater than the outer diameter of the original pipe.

The material of the semi-sealing ring is graphite, the end faces of the two butted half-sealing rings are inclined, and the bulge height at the corresponding inner diameter is greater than that at the corresponding outer diameter.

The material of the sealing strip is graphite packing.

The fastening bolt group includes special type bolts, middle bolts and nuts.

A cylindrical polished rod, a cone-shaped polished rod, and a screw rod are sequentially arranged from the end of the fixed nut on the special-shaped bolt, and the outer diameter of the cylindrical polished rod is larger than the outer diameter of the screw rod.

The middle bolt and nut are fixed with the screw rod, the screw rod is composed of a cylindrical polished rod and a screw rod, and the outer diameter of the cylindrical polished rod is the same or different from the outer diameter of the screw rod.

The effect of the utility model: the seal of the utility model adopts graphite material, and through the special structural type, a reliable and permanent seal is realized; the arrangement of the special-shaped bolt simplifies the overall structure of the device, ensures the reliability of the plugging, and reduces the difficulty of underwater construction , easy to automate underwater construction; the setting of the clamping device enables the plugging device to be reliably fixed on the original pipeline; the release of the clamping device is suitable for the operation of underwater robots or divers; Features such as water depth limitation, permanent sealing and fixing of leakage points, and low cost of offshore operations, are especially suitable for underwater emergency maintenance of deep-water submarine pipelines.

Description of drawings

Fig. 1 is a schematic diagram of a plugging and reinforcing device outside a submarine pipeline;

Fig. 2 is the A-A view in Fig. 1;

Fig. 3 is the B-B view in Fig. 2;

In the figure: 1. Special type bolt, 2. Right housing, 3. Clamping device, 4. Left housing, 5. Half seal, 6. Guide sleeve, 7. Guide body, 8. Middle bolt, 9. Sealing strip, 10, anode block, 11, original pipe, 3a, guide block, 3b, wedge block, 3c, spring, 3d, end cap, 3e, lock lever, 3f, lock shaft, 3g, lever.

Detailed ways

The present utility model is further described in conjunction with accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3 of the description:

Example 1:

Referring to Figures 1 and 2, an external leakage plugging and reinforcing device for a submarine pipeline comprises a pair of left casings 4 and right casings 2 and a set of fastening bolts matched with the left casing 4 and the right casing 2. , clamping device 3, sealing strip 9, semi-sealing ring 5, of which:

A half-cylindrical groove and a half-conical groove corresponding to each other are machined in the middle position between the mating surfaces of the right casing 2 and the left casing 4 respectively. Semi-cylindrical groove and semi-conical groove, semi-cylindrical groove matching with original pipe 11, semi-cylindrical groove matching with semi-sealing ring 5, semi-cylindrical groove matching with original pipe 11, large semi-cylindrical groove matching with original pipe 11 , all stepped semi-cylindrical grooves and conical grooves at both ends are symmetrical and have the same center line; on the outside of the stepped semi-cylindrical grooves and conical grooves, and on the joint surface of the right shell 2 and the left shell 4, there are respectively provided with For the sealing groove matched with the sealing strip 9, the sum of the depths of the corresponding sealing grooves on the right casing 2 and the left casing 4 is less than the height of the sealing strip 9, and the ends of the two ends of the sealing groove are respectively in the half of the half sealing ring 5. The middle position of the cylindrical groove; on the upper part of the right casing 2 and the left casing 4, two guide sleeves 6 are symmetrically arranged respectively, the guide sleeve 6 is matched with the guide body 7, and both the guide sleeve 6 and the guide body 7 are perpendicular to the original pipe 11 Center line; half-sealing rings 5 are symmetrically embedded in the corresponding semi-cylindrical grooves on the right casing 2 and the left casing 4, and the ends of the half-sealing rings 5 are all protruding from the joint surface of the right casing 2 and the left casing 4 ; In the sealing grooves on the right casing 2 and the left casing 4, the sealing strips 9 are respectively inlaid, and the two ends of the sealing strip 9 are respectively provided with recesses that are matched with the semi-sealing ring 5, both of which are interference fit; the clamping device 3 is arranged at both ends of the right casing 2 and the left casing 4, and is matched with the corresponding end faces, semi-cylindrical grooves and semi-conical grooves on the right casing 2 and the left casing 4 respectively.

Example 2

On the basis of Embodiment 1, referring to FIG. 3, the clamping device 3 includes a guide block 3a, a wedge block 3b, a spring 3c, an end cover 3d, a lock lever 3e, a lock shaft 3f and a lever 3g; wherein the end cover 3d is a semi-circular structure, which cooperates with the right shell 2 and the left shell 4 and is fixed at both ends respectively. The cylindrical surface protrudes from the outside of the right shell 2 and the left shell 4, the semi-cylindrical surface is matched with the corresponding semi-cylindrical grooves on the right shell 2 and the left shell 4, and the semi-conical surface is matched with the right shell 2 and the left shell The semi-conical groove on the body 4 is matched with the semi-cylindrical groove in the end cover 3d which is clearance fit with the original pipe 11; the guide block 3a is symmetrically fixed on the inner end face of the end cover 3d, and is matched with the end face of the wedge block 3b, and the spring 3c is arranged The blind groove matched with the inner end face of the end cover 3d is processed with a cavity that is rotatably matched with the locking rod 3e; the lever 3g is arranged in the cavity that is rotatably matched with the outer end face of the end cover 3d; The groove is provided with screw teeth and matched with the original pipe 11. The outer surface is in the shape of a cone, which is matched with the semi-conical grooves corresponding to the right casing 2 and the left casing 4. A cone-shaped tail is set at the tail end of the wedge block 3b. The outer surface is matched with the corresponding semi-conical grooves of the right shell 2 and the left shell 4, the inner surface is matched with the semi-conical surface of the end cover 3d, the end surface is matched with the stepped end surface of the end cover 3d, and the rear wing corresponds to the lock rod 3e. An arc-shaped groove is provided for its rotation, and the wedge block 3b is provided with a blind groove matched with the spring 3c.

Further, corresponding to the radial centerline position of the wedge block 3b, a wedge block locking mechanism composed of a lock rod 3e, a lock shaft 3f, and a toggle rod 3g is provided, and the lock shaft 3f cooperates with the through groove on the end cover 3d, and is located there. The two ends are respectively fixed to the lock rod 3e and the toggle rod 3g; two or more springs 3c and a set of wedge block locking mechanism are symmetrically arranged corresponding to each wedge block 3b.

Example 3

On the basis of embodiment 1 or 2, further:

The four corners of the left housing 4 are closely matched with the special-shaped bolt 1, and the four corners of the right housing 2 are provided with stepped grooves corresponding to the special-shaped bolt 1. The polished rod part of bolt 1 is tightly fitted, and the small-diameter groove is in clearance fit with the lead screw part of special bolt 1; in the middle of the right shell 2 and the left shell 4, a slot for clearance fit with the middle bolt 8 is respectively set; relative to the right shell 2 Opposite to the joint surface of the left shell 4, a plane parallel to the joint surface is arranged on the right shell 2, which is matched with the corresponding fixing nut surface of the special bolt 1 and the middle bolt 8, and the special bolt 1 is screwed. And the fixing nut of the middle bolt 8 is fixed on the right casing 2, and the anode block 10 is arranged in the middle position of the surface; relative to the opposite side of the joint surface of the right casing 2 and the left casing 4, the left casing 4 is arranged parallel to the The plane of the joint surface is matched with the corresponding movable nut surface of the special-shaped bolt 1 and the middle bolt 8, and the anode block 10 is arranged in the middle position of the surface.

Limiting rings are provided at both ends of the guide body 7; when the right housing 2 and the left housing 4 are respectively close to the limiting rings on the guide body 7, the special-shaped bolts 1 and the middle bolts fixed on the left housing 4 The distance between the end of the screw rod 8 and the joint surface of the right housing 2 is greater than the outer diameter of the original pipe 11 .

The semi-sealing ring 5 is made of graphite, and the end faces of the two butt-jointed semi-sealing rings 5 are oblique, and the bulge height at the corresponding inner diameter is greater than that at the corresponding outer diameter.

The material of the sealing strip 9 is graphite packing.

The fastening bolt group includes special-shaped bolts 1 , middle bolts 8 and nuts.

The special-shaped bolt 1 is sequentially provided with a cylindrical polished rod, a cone-shaped polished rod, and a screw rod from the end of the fixed nut, and the outer diameter of the cylindrical polished rod is larger than the outer diameter of the screw rod.

The middle bolt 8 and the nut are fixed with the screw rod, the screw rod is composed of a cylindrical polished rod and a screw rod, and the outer diameter of the cylindrical polished rod is the same or different from the outer diameter of the screw rod.

Example 4

The utility model discloses a plugging and reinforcing device for external leakage of a submarine pipeline, which consists of a special bolt 1, a right casing 2, a clamping device 3, a left casing 4, a semi-sealing ring 5, a guide sleeve 6, and a guide body 7 , the middle bolt 8, the sealing strip 9, and the anode block 10.

The right casing 2 and the left casing 4 are arranged in pairs and cooperate with each other, and corresponding and identical stepped semi-cylindrical holes and semi-conical holes are respectively machined in the middle position between the joint surfaces of the right casing 2 and the left casing 4. , starting from the end: the stepped semi-cylindrical hole and the semi-conical hole matched with the clamping device 3, the semi-cylindrical hole matched with the original pipe 11, the semi-cylindrical hole matched with the semi-sealing ring 5, and the original The semi-cylindrical hole matched with the pipe 11 and the large semi-cylindrical hole matched with the original pipe 11, all stepped semi-cylindrical holes and tapered holes at both ends are symmetrical and have the same centerline; , On the joint surfaces of the right casing 2 and the left casing 4, there are respectively provided with sealing grooves matched with the sealing strip 9. The sum of the depths of the corresponding sealing grooves on the right casing 2 and the left casing 4 is less than the depth of the sealing strip 9. Height, both ends of the sealing groove are located in the middle of the semi-cylindrical hole where the semi-sealing ring 5 is located; the four bolt holes in the corners of the left A stepped hole is set on each corner corresponding to the special bolt 1, the large hole is closely matched with the polished rod part of the special bolt 1, and the small hole is a clearance fit with the screw part of the special bolt 1; in the right housing 2 and the left housing 4 The middle position of the bolts 8 are respectively provided with holes matching with the middle bolts 8, and the clearance fit; relative to the opposite side of the joint surface of the right shell 2 and the left shell 4, a plane parallel to the joint surface is set on the right shell 2, which is consistent with the special type. The corresponding fixing nut surfaces of the bolt 1 and the middle bolt 8 are matched, and the fixing nut of the special bolt 1 and the middle bolt 8 is fixed on the right housing 2 with screws, and the anode block 10 is arranged in the middle position of the surface; On the opposite side of the joint surface of the shell 2 and the left shell 4, a plane parallel to the joint surface is set on the left shell 4, and is matched with the corresponding movable nut surface of the special bolt 1 and the middle bolt 8. The middle position of the surface is Anode block 10 is provided; on the upper part of the right casing 2 and the left casing 4, two guide sleeves 6 are symmetrically arranged respectively, the guide sleeve 6 is matched with the guide body 7, and the guide sleeve 6 and the guide body 7 are both perpendicular to the center of the original pipe 11 The two ends of the guide body 7 are provided with limit rings; the semi-sealing ring 5 is made of graphite, which is symmetrically embedded in the corresponding semi-cylindrical holes on the right casing 2 and the left casing 4, and the ends are all protruding from the right casing. The joint surface of the body 2 and the left casing 4, the end faces of the two butt-jointed half-sealing rings 5 are inclined and the bulge height at the corresponding inner diameter is greater than the bulge height at the corresponding outer diameter; the material of the sealing strip 9 is graphite packing , respectively inlaid in the sealing grooves on the right casing 2 and the left casing 4, and the ends of both ends are respectively provided with recesses that cooperate with the semi-sealing ring 5, both of which are interference fit; the clamping device 3 is arranged on the right casing 2 and the two ends of the left casing 4 are respectively matched with the corresponding end faces, semi-cylindrical holes and semi-conical holes on the right casing 2 and the left casing 4.

in:

The clamping device 3 is composed of a guide block 3a, a wedge block 3b, a spring 3c, an end cover 3d, a lock rod 3e, a lock shaft 3f, and a lever 3g; Matching and fixing at its two ends respectively, the outer circular surface is processed into stepped large semi-cylindrical surface, semi-cylindrical surface and semi-conical surface in turn. The surface is matched with the corresponding semi-cylindrical holes on the right shell 2 and the left shell 4, the semi-conical surface is matched with the semi-conical holes on the right shell 2 and the left shell 4, and the end cover 3d is internally processed with the original pipe 11 The semi-cylindrical hole with clearance fit; the inner end surface of the end cover 3d is symmetrically fixed to the guide block 3a, and is matched with the end surface of the wedge block 3b, the inner end surface of the end cover 3d is arranged with a blind hole that cooperates with the spring 3c, and the hollow hole suitable for the rotation of the lock rod 3e is processed. cavity; the outer end surface of the end cover 3d is provided with a cavity suitable for the rotation of the lever 3g; the wedge block 3b is in the shape of a vertebral body, the inner hole is provided with screw teeth and is matched with the original pipeline 11, and the outer surface is in the shape of a vertebral body, which is in the shape of a vertebral body, which is in the shape of the right shell 2 Matching with the semi-conical holes corresponding to the left shell 4, a cone-shaped tail fin is arranged at the tail end of the wedge block 3b, the outer surface of the tail fin is matched with the semi-conical holes corresponding to the right shell 2 and the left shell 4, The end cover 3d is matched with the semi-conical surface, the end surface is matched with the stepped end surface of the end cover 3d, an arc-shaped groove is provided on the tail wing corresponding to the lock rod 3e for its rotation, and the wedge block 3b is provided with a blind hole matched with the spring 3c, The two sides of the wedge block 3b are matched with the guide block 3a, and are parallel to the radial centerline of the wedge block 3b; corresponding to the radial centerline position of the wedge block 3b, a lock rod 3e, a lock shaft 3f and a lever 3g are provided. The wedge block locking mechanism, the lock shaft 3f is matched with the through hole on the end cover 3d, and the lock rod 3e and the lever 3g are respectively fixed at both ends thereof; corresponding to each wedge block 3b symmetrically arranged two or more springs 3c, A set of wedge block locking mechanism; the guide block 3a is fixed on the inner end surface of the end cover 3d, the side is matched with the wedge block 3b, the inner hole is matched with the original pipe 11, the outer circular surface is a tapered surface, and the right casing 2 and the left casing are matched 4 Half-tapered hole fit.

A nut at one end of the special-shaped bolt 1 is fixed with a screw rod, and the screw rod is sequentially provided with a cylindrical polished rod, a cone-shaped polished rod, and a screw rod from the fixed nut end, and the outer diameter of the cylindrical polished rod is larger than the outer diameter of the screw rod.

A nut at one end of the middle bolt 8 is fixed with a screw rod, the screw rod is composed of a cylindrical polished rod and a screw rod, and the outer diameter of the cylindrical polished rod is the same as the outer diameter of the screw rod.

When the right housing 2 and the left housing 4 are in close contact with the limiting rings on the guide body 7 respectively, the ends of the special-shaped bolts 1 and the middle bolts 8 fixed on the left housing 4 and the ends of the screw rods of the right housing 2 The distance between the joint surfaces is larger than the outer diameter of the original pipe 11 .

One or more wedge blocks 3b may be provided corresponding to each end cap 3d.

The function of the external leakage plugging and reinforcing device of the submarine pipeline of the utility model is to realize the plugging of local leakage points or defects of the submarine pipeline under water by mechanical means, so as to ensure the safe operation of the submarine pipeline. The specific work process is:

Initial state: the semi-sealing ring 5 is installed in the corresponding semi-cylindrical holes on the right casing 2 and the left casing 4 respectively; the sealing strip 9 is installed in the sealing groove on the right casing 2 or the left casing 4; The type bolt 1 and the middle bolt 8 are respectively installed and fixed on the left housing 4; the spring 3c on the clamping device 3 is in a compressed state, the wedge block 3b is in close contact with the corresponding end face of the end cover 3d, and the locking rod 3e is in the position of the wedge block 3b. The right housing 2 and the left housing 4 are in close contact with the limiting rings at both ends of the guide body 7 respectively.

Installation process: hoist the blocking device and make its center line roughly align with the center line of the original pipe 11, the right shell 2 and the left shell 4 move towards each other along the guide body 7 under the action of external force, and after moving a certain distance, fix it. The special-shaped bolts 1 to the left casing 4 will gradually be combined with the corresponding holes on the right casing 2, and will be accurately guided. It will be combined with the original pipeline 11, and then screw all the special bolts 1 and the movable nuts on the middle bolts 8 to the specified torque through the bolt screwing equipment synchronously, and then screw the lever 3g through the underwater robot or diver, and then lock the shaft. 3f drives the locking rod 3e to rotate, unlocking the wedge block 3b, and the wedge block 3b will be squeezed onto the original pipe 11 under the action of the spring 3c, and the installation work can be completed.

The function of the clamping device 3 is to fix the blocking device to the original pipe, the function of the spring 3c in the clamping device 3 is to release the wedge block 3b and establish the initial friction between the wedge block 3b and the original pipe 11, and the wedge block 3b and the original pipe 11. The semi-conical holes on the right casing 2 and the left casing 4 are matched, and combined with the screw-type inner hole structure of the wedge block 3b, it can increase with the increase of the external force of the moving blocking device, so as to fix the sealing. blocking device.

The semi-sealing ring 5 is made of graphite material, and the sealing strip 9 is made of graphite packing, and by means of its specially designed structure, it can achieve permanent and reliable sealing.

The anode block 11 is used to avoid and slow down the corrosion of the plugging device.

Claims (10)

1. The utility model provides a submarine pipeline outer of tubes leaking stoppage reinforcing apparatus, including left casing (4) and right casing (2) that dispose in pairs and with left casing (4) and right casing (2) complex fastening bolt group, the solid device of card (3), sealing strip (9), semi-seal circle (5), its characterized in that, the intermediate position between right casing (2) and left casing (4) involution face is processed respectively and is had half cylinder groove and the half cone groove that corresponds each other and the same, begins to be in proper order from the tip: the semi-cylindrical groove and the semi-conical groove are matched with the clamping device (3), the semi-cylindrical groove is matched with the original pipeline (11), the semi-cylindrical groove is matched with the semi-sealing ring (5), the semi-cylindrical groove is matched with the original pipeline (11), the large semi-cylindrical groove is matched with the original pipeline (11), and all the semi-cylindrical grooves and the conical grooves in the stepped shape at two ends are symmetrical and are the same center line; sealing grooves matched with the sealing strips (9) are respectively arranged on the outer sides of the step-shaped semi-cylindrical groove and the conical groove and the joint surface of the right shell (2) and the left shell (4), the sum of the depths of the corresponding sealing grooves on the right shell (2) and the left shell (4) is smaller than the height of the sealing strips (9), and the end parts of the two ends of each sealing groove are respectively positioned in the middle of the semi-cylindrical groove where the semi-sealing ring (5) is positioned; two guide sleeves (6) are symmetrically arranged on the upper parts of the right shell (2) and the left shell (4) respectively, the guide sleeves (6) are matched with the guide bodies (7), and the guide sleeves (6) and the guide bodies (7) are perpendicular to the central line of the original pipeline (11); semi-sealing rings (5) are symmetrically embedded in corresponding semi-cylindrical grooves on the right shell (2) and the left shell (4), and the end parts of the semi-sealing rings (5) protrude out of the combined surface of the right shell (2) and the left shell (4); sealing strips (9) are respectively embedded in sealing grooves on the right shell (2) and the left shell (4), and the end parts of the two ends of each sealing strip (9) are respectively provided with a recess matched with the semi-sealing ring (5) and are in interference fit; the clamping and fixing devices (3) are arranged at two ends of the right shell (2) and the left shell (4) and are respectively matched with the corresponding end face, the semi-cylindrical groove and the semi-conical groove on the right shell (2) and the left shell (4).

2. The external leaking stoppage reinforcing device of the submarine pipeline according to claim 1, wherein the clamping device (3) comprises a guide block (3a), a wedge block (3b), a spring (3c), an end cover (3d), a lock rod (3e), a lock shaft (3f) and a deflector rod (3 g); the end cover (3d) is of a semicircular structure, is matched with the right shell (2) and the left shell (4) and is respectively fixed at the two ends of the right shell and the left shell, the outer circular surface is sequentially processed into a step-shaped large-diameter semi-cylindrical surface, a semi-cylindrical surface and a semi-conical surface, the large-diameter semi-cylindrical surface protrudes out of the right shell (2) and the left shell (4), the semi-cylindrical surface is matched with corresponding semi-cylindrical grooves on the right shell (2) and the left shell (4), the semi-conical surface is matched with semi-conical grooves on the right shell (2) and the left shell (4), and the semi-cylindrical grooves in clearance fit with the original pipeline (11) are processed inside the end cover (3 d); the guide blocks (3a) are symmetrically fixed on the inner end face of the end cover (3d) and matched with the end face of the wedge block (3b), the spring (3c) is arranged in a blind groove matched with the inner end face of the end cover (3d), and a cavity rotationally matched with the lock rod (3e) is machined; the deflector rod (3g) is arranged in a cavity which is rotationally matched with the outer end face of the end cover (3 d); the wedge block (3b) is in a cone shape, the inner groove is provided with threads and matched with an original pipeline (11), the outer surface is in a cone shape and matched with semi-conical grooves corresponding to the right shell (2) and the left shell (4), the tail end of the wedge block (3b) is provided with a cone-shaped tail wing, the outer surface of the tail wing is matched with the semi-conical grooves corresponding to the right shell (2) and the left shell (4), the inner surface of the tail wing is matched with a semi-conical surface of the end cover (3d), the end surface of the tail wing is matched with a step end surface of the end cover (3d), an arc-shaped groove for rotation of the tail wing is formed in the position corresponding to the lock rod (3e), the wedge block (3b) is provided with a blind groove matched with the spring (3c), and the two side surfaces of the wedge block (3b) are matched with the guide block (3 a).

3. The external leaking stoppage reinforcing device of the submarine pipeline according to claim 2, wherein a wedge locking mechanism consisting of a locking rod (3e), a locking shaft (3f) and a deflector rod (3g) is arranged corresponding to the radial centerline position of the wedge (3b), the locking shaft (3f) is matched with the through groove on the end cover (3d), and the locking rod (3e) and the deflector rod (3g) are respectively fixed at the two ends of the locking shaft (3 f); two or more springs (3c) and a set of wedge block locking mechanisms are symmetrically arranged corresponding to each wedge block (3 b).

4. The external leaking stoppage reinforcing device for the submarine pipeline according to claims 1, 2 and 3, wherein four bolt grooves at the corners of the left shell (4) are tightly matched with the special-shaped bolt (1), stepped grooves are arranged at the four corners of the right shell (2) corresponding to the special-shaped bolt (1), the large-caliber groove of each stepped groove is tightly matched with the polished rod part of the special-shaped bolt (1), and the small-caliber groove is in clearance fit with the screw rod part of the special-shaped bolt (1); grooves which are in clearance fit with the middle bolts (8) are respectively arranged at the middle positions of the right shell (2) and the left shell (4); relative to the opposite surface of the joint surface of the right shell (2) and the left shell (4), a plane parallel to the joint surface is arranged on the right shell (2) and is matched with the corresponding fixed nut surfaces of the special bolt (1) and the middle bolt (8), the fixed nuts of the special bolt (1) and the middle bolt (8) are fixed on the right shell (2) by screws, and an anode block (10) is arranged in the middle of the plane; relative to the opposite surface of the joint surface of the right shell (2) and the left shell (4), a plane parallel to the joint surface is arranged on the left shell (4) and matched with the corresponding movable nut surfaces of the special-shaped bolt (1) and the middle bolt (8), and an anode block (10) is arranged in the middle of the plane.

5. The external leaking stoppage reinforcing device for the submarine pipeline according to claim 4, wherein limiting rings are arranged at two ends of the guide body (7); when the right shell (2) and the left shell (4) are respectively attached to the limiting lifting rings on the guide body (7), the distance between the screw rod end parts of the special bolt (1) and the middle bolt (8) fixed on the left shell (4) and the joint surface of the right shell (2) is larger than the outer diameter of the original pipeline (11).

6. The external leaking stoppage reinforcing device for the submarine pipeline according to claim 5, wherein the semi-sealing rings (5) are made of graphite, the end surfaces of the two butted semi-sealing rings (5) are inclined, and the protruding height of the corresponding inner diameter is greater than that of the corresponding outer diameter.

7. The external leaking stoppage reinforcing device for the submarine pipeline according to claim 6, wherein the sealing strip (9) is made of graphite packing.

8. The external leaking stoppage reinforcing device for the submarine pipeline according to claims 1, 2 and 3, wherein the fastening bolt group comprises a special bolt (1), a middle bolt (8) and a nut.

9. The external leaking stoppage reinforcing device of the submarine pipeline according to claim 8, wherein the special-shaped bolt (1) is provided with a cylindrical polished rod, a cone-shaped polished rod and a screw rod in sequence from the end of the fixing nut, and the outer diameter of the cylindrical polished rod is larger than that of the screw rod.

10. The external leaking stoppage reinforcing device for the submarine pipeline according to claim 8, wherein the middle bolt (8) is fixed with a nut and a screw rod, the screw rod is composed of a cylindrical polished rod and a screw rod, and the outer diameter of the cylindrical polished rod is the same as or different from that of the screw rod.

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