CN210550492U - Riser annulus inner surface cleaning device mounted on offshore platform in use - Google Patents
Riser annulus inner surface cleaning device mounted on offshore platform in use Download PDFInfo
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- CN210550492U CN210550492U CN201921032003.8U CN201921032003U CN210550492U CN 210550492 U CN210550492 U CN 210550492U CN 201921032003 U CN201921032003 U CN 201921032003U CN 210550492 U CN210550492 U CN 210550492U
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Abstract
The utility model discloses an install riser annular space internal surface cleaning device in use on offshore platform, under operation wire rope's the traction, freely remove from top to bottom along the inner tube. Meanwhile, a sand blasting device arranged on the device can act in the circumferential direction in the annular space, and abrasive is sprayed to the periphery to process the outer surface of the stand pipe and the inner surface of the protective pipe. Deck control personnel accessible camera observe the processing conditions, controlling means range from top to bottom. The treatment of the inner surface of the riser annulus can be realized, and the guarantee is provided for further maintenance work.
Description
Technical Field
The utility model relates to an annular space internal surface cleaning device, specifically speaking relate to a riser annular space internal surface cleaning device.
Background
The submarine pipeline vertical pipe has the same special structure, the outer corrosion area of the vertical pipe passes through a splashing area, a tidal range area, a full immersion area and a sea mud area from an atmospheric area, the corrosion condition is complex and variable, and particularly the splashing area is a serious disaster area caused by the corrosion outside the marine environment. Subsea pipeline riser leak events are mostly caused by corrosion.
Because the stand pipe is connected with the submarine pipeline through a bottom deck (intertidal zone), the upper part of the platform is in a completely closed state, the internal space of the platform cannot be cleaned and repaired by the conventional technical means, and the stand pipe is passively overhauled and replaced after being leaked in most cases. The passive maintenance method can not only lose the precious time of maintenance and cause environmental damage, but also has the problems of long maintenance period and higher overall cost.
When the riser filling maintenance service is carried out, the surface attachments in the annulus must be cleaned firstly, the surface is treated to about Sa2.5, and then the riser annulus filling service is carried out. Because the size of the riser annulus is about 40 mm-60 mm, under the condition that the whole structure is not damaged and local cutting (300mm multiplied by 300mm) is carried out to clean the outer wall of the riser and the inner wall of the protective pipe, no device for cleaning the inner surface of the riser annulus in use exists at present.
Disclosure of Invention
An object of the utility model is to overcome prior art's shortcoming, provide one kind can be in the narrow and small space of riser annular space, under the prerequisite under the condition of not demolising the riser, implement the annular space internal surface cleaning device of the online clearance operation of normal position.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a riser annular internal surface cleaning device, including annular chassis and the annular external gear of installing on annular chassis, annular external gear's inner wall on install a plurality of spring universal ball, annular external gear's diapire on open along the circumferencial direction have T shape draw-in groove, T shape draw-in groove internal rotation install with T shape draw-in groove shape identical T shape slider, along vertical direction symmetry be fixed with two supports on annular external gear roof, be fixed with a wire rope lug on each support, T shape slider pass through the bolt fastening at the inner circle edge of annular chassis roof, annular chassis's inner ring diameter the same with annular external gear's inner ring diameter and both coaxial line settings;
the bidirectional vane type pneumatic motor is fixed on the top wall of the annular chassis positioned on the outer side of the annular external gear through a bracket, a driving gear is installed on a rotating shaft of the pneumatic motor arranged along the vertical direction, and the driving gear is meshed with the annular external gear;
a sandblast pipe sets up along vertical through annular chassis sandblast pipe's bottom exit install the sandblast mouth, sandblast pipe's import be used for connecting outside sandblast feeding mechanism, miniature camera passes through the support mounting on annular chassis's roof, miniature camera can rotate under annular chassis drives and aim at riser inner tube outer wall and sheathed tube pillar inner wall setting, annular chassis and annular outer gear be the annular structure that constitutes by the same split structure butt joint of many lamellas.
The utility model has the advantages that: the on-line cleaning operation of the original position can be implemented in the narrow space of a riser annulus on the premise of not dismantling the riser. The method has the advantages of low construction cost and short operation time, and importantly, the stand pipe does not need to be replaced during production halt, so that the method is easy to operate and greatly reduces the working strength of constructors.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention.
FIG. 1 is a schematic structural view of the device for cleaning the inner surface of the riser annulus according to the present invention;
FIG. 2 is an isometric view of an external circular gear in the apparatus of FIG. 1;
FIG. 3 is a schematic view of the combination of the annular base plate and the equivalent structure of the apparatus shown in FIG. 1;
FIG. 4 is a schematic diagram of the connection of the structure shown in FIG. 3;
FIG. 5 is a cross-sectional view of the junction of an external ring gear and an annular base plate in the apparatus shown in FIG. 1;
FIG. 6 is a schematic view of the installation of the device shown in FIG. 1;
FIG. 7 is a top view of the apparatus shown in FIG. 1;
3 fig. 3 8 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 the 3 device 3 shown 3 in 3 fig. 3 7 3. 3
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a riser annular space internal surface cleaning device as shown in the attached drawing, including annular chassis 4 and the annular external gear 1 of installing on annular chassis 4 the inner wall of annular external gear 1 on install a plurality of spring universal ball 3, preferably be in the same circumferencial direction of the inner wall of annular external gear 1 evenly install six spring universal ball 3. In use, the external annular gear 1 is adapted to fit over the outer wall of the inner pipe 13 of the casing. The inner surface cleaning device of the riser annulus can be ensured to freely move up and down along the inner pipe 13 to reach the position of the annulus to be treated by the spring type universal ball 3. The bottom wall of the annular external gear 1 is provided with a T-shaped clamping groove along the circumferential direction, and a T-shaped sliding block 15 matched with the T-shaped clamping groove in shape is rotatably arranged in the T-shaped clamping groove. Two supports are symmetrically fixed on the top wall of the annular external gear 1 along the vertical direction, and a steel wire rope lifting lug 2 is fixed on each support, so that the steel wire rope can be conveniently hung and the traction force is uniform.
The T-shaped sliding block 15 is fixed at the edge of the inner ring of the top wall of the annular base plate 4 through a bolt 10, the diameter of the inner ring of the annular base plate 4 is the same as that of the inner ring of the annular external gear 1, and the two are coaxially arranged.
The bidirectional vane type pneumatic motor 7 is fixed on the top wall of the annular chassis 4 positioned on the outer side of the annular external gear 1 through a bracket, a driving gear is installed on a rotating shaft of the pneumatic motor 7 arranged along the vertical direction, and the driving gear is meshed and matched with the annular external gear 1. The bidirectional vane type pneumatic motor 7 can control the positive and negative rotation thereof through an air source, and the component is the key for determining the rotation of the annular work platform. The utility model discloses in, pneumatic motor 7's control method is that corotation round reversal round reciprocating rotation's fixed mode carries out work, and its rotational speed is adjustable.
A sand blasting pipe 5 sets up along vertical annular chassis 4 that runs through the bottom exit of sand blasting pipe 5 install sand blasting nozzle 8, and preferred sand blasting nozzle 8 adopts the loose sand head structure of straight tube, both can overcome the unable problem that holds in narrow and small space of conventional sand blasting nozzle, can also guarantee simultaneously that the abrasive material can be to evenly spraying all around. The inlet of the sand blasting pipe is used for connecting an external sand blasting supply device. The miniature camera 6 is arranged on the top wall of the annular chassis 4 through a bracket. The miniature camera 6 can rotate under the drive of the annular chassis 4 and aim at the outer wall of the stand pipe inner pipe 13 and the inner wall of the protective pipe 14 of the sleeve pipe. Effectively alleviate the sandblast to miniature camera 6's wearing and tearing on the one hand, on the other hand also is convenient for observe the riser inner tube outer wall and pillar inner wall surface after the sandblast. Due to the narrow space, the wide-angle camera with the bidirectional short focal length is selected, so that the inner surface and the outer surface of an annular space formed between the inner pipe of the stand pipe and the protective pipe can be checked at the same time, and a video picture can be obtained to the maximum extent.
The annular base plate 4 and the annular outer gear 1 are both of annular structures formed by abutting and fixing the same split structures of multiple lobes (preferably six lobes). As an embodiment of the present invention, the downward concave recess of one end of each split structure forms a concave table and the inward concave recess of the lower part of the other end forms an upper convex shoulder, the concave table and the upper convex shoulder are respectively opened with a positioning groove 11 along the vertical direction, the convex shoulder of one split structure in the adjacent two split structures is supported on the concave table of the other split structure and is fixedly connected with the bayonet 12 through the positioning groove 11 passing through the two split structures.
The installation and use method of the device comprises the following steps:
when the device is used, the six-segment split structure of the annular chassis 4 is sent into the annular space one by one and is rapidly assembled together through the positioning groove 11 and the bayonet 12. The T-shaped groove of the annular external gear 1 is filled with a T-shaped sliding block 15, and the divided parts are fed into the annular space one by one and are quickly assembled together through the positioning grooves 11 and the clamping pins 12. The T-shaped slide block 15 is fixed on the annular chassis 4 through the bolt 10, so that the annular external gear 1 and the annular chassis 4 are integrally connected and can synchronously rotate.
Under the user state, hang wire rope lug 2 with wire rope, with external sand supply equipment and the import of sandblast pipe 5 continuous, miniature camera 6 and pneumatic motor 7 pass through the signal line and link to each other with pneumatic motor 7 with the trachea connection computer on the platform.
Under the condition of radially symmetrically cutting two windows (300mm multiplied by 300mm) along the protective tube 14 on the upper part of the sheathed tube protective tube 14, the device is installed in the annulus of the riser of the marine pipe to be cleaned, a steel wire rope is released, the device slides downwards under the action of gravity, the device moves on the inner tube 13 of the riser through the spring type universal ball 3 to reach the position of the annulus to be treated, sand is supplied to the device, so that the sand blasting nozzle 8 is sprayed out to clean the outer wall of the inner tube 13 and the outer wall of the protective tube 14 on the surface of the inner tube, a computer output signal drives the pneumatic motor 7 to rotate, the annular outer gear 1 and the annular disc plate 4 are driven to rotate together, and the sand blasting nozzle 8 is driven to rotate synchronously along with the rotation of. In the rotating process, the micro camera 6 can synchronously observe the cleaning states of the outer wall of the inner tube 13 and the outer wall of the protective tube 14 in a video mode. The deck control personnel can observe the processing condition through a computer connected with the camera, and the vertical amplitude of the device is controlled by controlling the steel wire rope and the gravity action. The treatment of the inner surface of the riser annulus can be realized, and the guarantee is provided for further maintenance work.
Claims (4)
1. Riser annular space internal surface cleaning device, its characterized in that: the annular chassis and the annular external gear are arranged on the annular chassis, a plurality of spring type universal balls are arranged on the inner wall of the annular external gear, a T-shaped clamping groove is formed in the bottom wall of the annular external gear along the circumferential direction, a T-shaped sliding block matched with the T-shaped clamping groove in shape is rotatably arranged in the T-shaped clamping groove, two supports are symmetrically fixed on the top wall of the annular external gear along the vertical direction, a steel wire rope lifting lug is fixed on each support, the T-shaped sliding block is fixed on the edge of the inner ring of the top wall of the annular chassis through a bolt, the diameter of the inner ring of the annular chassis is the same as that of the inner ring of the annular external gear, and the inner ring and;
the bidirectional vane type pneumatic motor is fixed on the top wall of the annular chassis positioned on the outer side of the annular external gear through a bracket, a driving gear is installed on a rotating shaft of the pneumatic motor arranged along the vertical direction, and the driving gear is meshed with the annular external gear;
a sandblast pipe sets up along vertical through annular chassis sandblast pipe's bottom exit install the sandblast mouth, sandblast pipe's import be used for connecting outside sandblast feeding mechanism, miniature camera passes through the support mounting on annular chassis's roof, miniature camera can rotate under annular chassis drives and aim at riser inner tube outer wall and sheathed tube pillar inner wall setting, annular chassis and annular outer gear be the annular structure that constitutes by the same split structure butt joint of many lamellas.
2. The riser annulus inner surface cleaning apparatus of claim 1, wherein: one end of each split structure is recessed downwards to form a concave platform, the lower part of the other end of each split structure is recessed inwards to form an upper convex shoulder, positioning grooves are formed in the concave platform and the upper convex shoulder respectively in the vertical direction, and the convex shoulder of one split structure in two adjacent split structures is supported on the concave platform of the other split structure and is fixedly connected through a clamping pin penetrating through the positioning grooves of the two split structures.
3. A riser annulus inner surface cleaning apparatus as claimed in claim 1 or claim 2, wherein: six spring type universal balls are uniformly arranged on the inner wall of the annular external gear in the same circumferential direction.
4. The riser annulus inner surface cleaning apparatus of claim 3, wherein: the sand blasting nozzle adopts a straight pipe sand scattering head structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921032003.8U CN210550492U (en) | 2019-07-04 | 2019-07-04 | Riser annulus inner surface cleaning device mounted on offshore platform in use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921032003.8U CN210550492U (en) | 2019-07-04 | 2019-07-04 | Riser annulus inner surface cleaning device mounted on offshore platform in use |
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| Publication Number | Publication Date |
|---|---|
| CN210550492U true CN210550492U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921032003.8U Active CN210550492U (en) | 2019-07-04 | 2019-07-04 | Riser annulus inner surface cleaning device mounted on offshore platform in use |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253450A (en) * | 2019-07-04 | 2019-09-20 | 中海油（天津）管道工程技术有限公司 | A kind of standpipe annular space inner surface cleaning device being mounted on offshore platform in use |
| CN114102446A (en) * | 2021-12-09 | 2022-03-01 | 中江立江电子有限公司 | Automatic metal packaging type tube shell sand blasting device |
| CN114161325A (en) * | 2021-12-09 | 2022-03-11 | 中江立江电子有限公司 | Sand blasting system for metal packaging type tube shell |
-
2019
- 2019-07-04 CN CN201921032003.8U patent/CN210550492U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253450A (en) * | 2019-07-04 | 2019-09-20 | 中海油（天津）管道工程技术有限公司 | A kind of standpipe annular space inner surface cleaning device being mounted on offshore platform in use |
| CN114102446A (en) * | 2021-12-09 | 2022-03-01 | 中江立江电子有限公司 | Automatic metal packaging type tube shell sand blasting device |
| CN114161325A (en) * | 2021-12-09 | 2022-03-11 | 中江立江电子有限公司 | Sand blasting system for metal packaging type tube shell |
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