CN219300205U

CN219300205U - Online plugging device for corrosion monitoring device

Info

Publication number: CN219300205U
Application number: CN202320311519.6U
Authority: CN
Inventors: 南楠; 渠蒲; 毛兴东; 王树涛; 尹伊娜; 郭远明
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-07-04
Anticipated expiration: 2033-02-24

Abstract

The utility model belongs to the technical field of pipeline plugging, and particularly relates to an online plugging device for a corrosion monitoring device. The on-line plugging device for the corrosion monitoring device comprises a pipeline connecting assembly and a sealing assembly, wherein the pipeline connecting assembly comprises a connector, a pin corrosion locking mechanism is arranged on the connector, the sealing assembly comprises a screw rod which is in running fit with the connector and a screw nut which is matched with the screw rod, an expansion sleeve is arranged on one side, close to the connector, of the screw nut, and the expansion sleeve is blocked between the screw nut and the connector. When the device is used, the whole device can be connected to a pipeline through the hole on the valve core of the valve, the nut is driven to approach the connector by rotating the screw rod, and then the expansion sleeve is extruded, so that the expansion sleeve is tightly supported on the inner wall of the fixed seat after being expanded, the pipeline is plugged, and the device can achieve the effect of plugging the monitoring hole of the corrosion monitoring device under pressure based on the temporary plugging measure.

Description

Online plugging device for corrosion monitoring device

Technical Field

The utility model belongs to the technical field of pipeline plugging, and particularly relates to an online plugging device for a corrosion monitoring device.

Background

Currently, in the pipeline transportation of products with corrosiveness such as petroleum and natural gas, the service life and the safety and reliability of an oil and gas pipeline mainly depend on the environmental corrosiveness strength under the use condition, so that corrosion monitoring is necessary, namely, the corrosion state, the corrosion rate and the corrosion related parameters in the oil and gas pipeline are systematically measured, wherein a relatively wide detection method is a hanging piece method.

The hanging method is also called as weightlessness method, and is one of the most original and basic methods in corrosion monitoring, which is to open a monitoring hole on a pipeline and install a fixing seat, a valve and other relevant parts of a corrosion monitoring device, then use a special pick-and-place device to pass the corrosion monitoring device with a test piece through the valve port of the valve and the fixing seat and fix the corrosion monitoring device in the pipeline, take out the test piece after the pipeline runs for a period of time, and check the appearance, weightlessness measurement and the like of the test piece, thereby judging the corresponding corrosion condition of the pipeline.

The Chinese patent with the authority notice number of CN110274866B and the authority notice date of 2022, 5 and 20 discloses a hanging piece device and a method capable of simultaneously detecting gas phase and liquid phase corrosion. The device can be used in corrosion hanging pieces of oil gas bottom surface gathering and conveying pipelines for gas-liquid two-phase medium.

The Chinese patent with the authority of CN207964708U and the authority of 2018, 10 and 12 discloses a capacitive corrosion on-line monitoring device, which is characterized in that a hollow cylindrical corrosion hanging piece pair is designed, 2-8 groups of corrosion hanging piece pairs with different specifications are installed, and the capacitance of a variable capacitor in a corrosion monitoring circuit is changed according to the change of corrosion area of the corrosion hanging piece pairs with different specifications with time in a corrosion environment, so that the corrosion state of a gas pipeline is monitored on line. The device installs the heat exchange box on production pipeline, has the mount pad of ball valve to mount pad upper portion and corruption peg pass through threaded connection, and capacitanc corruption link is installed on the corruption link, and corruption link bottom and unable adjustment base threaded connection, transmission line and capacitanc corruption link are connected, sealed encapsulation in the corruption link.

Although the hanging piece method is economical, practical, reliable and effective, in use, related structural components of the corrosion monitoring device including the valve above the fixing seat inevitably contact with oil and gas products in a pipeline, and parts contacted with the oil and gas products over time are corroded and even leaked, and particularly the valve is corroded most obviously and is inconvenient to process. Therefore, in order to avoid leakage caused by long-term corrosion of the components, resource waste and even safety accidents are caused, the damaged components can be overhauled and replaced only by stopping production and releasing pressure, and for some pipelines which cannot be stopped production, the corrosion monitoring devices at the positions can be abandoned, monitoring holes are newly found at proper positions and stopped production and monitoring points are established, so that normal production is influenced, a large amount of manpower and material resources are wasted, and the prior art lacks a plugging device which can realize the replacement and overhaul of the damaged structures above the fixed seat and can realize the pressurized plugging of the monitoring holes of the corrosion monitoring devices of the pipelines.

It is therefore necessary to provide a plugging device that can plug the monitoring holes of the pipeline to realize the online replacement of damaged parts of the corrosion monitoring device.

Disclosure of Invention

The utility model aims to provide an online plugging device for a corrosion monitoring device, which is used for solving the technical problem that a monitoring hole of the corrosion monitoring device cannot be plugged under pressure in the prior art.

In order to achieve the above purpose, the technical scheme of the online plugging device for the corrosion monitoring device provided by the utility model is as follows:

the utility model provides an online plugging device for corrosion monitoring device, includes pipeline coupling assembling and seal assembly, pipeline coupling assembling includes the connector, be equipped with on the connector and sell and corrode locking mechanism, seal assembly include with connector normal running fit's lead screw and with lead screw complex screw one side that is close to of screw is equipped with the inflation cover, the inflation cover is stopped between screw and the connector.

The beneficial effects are that: the utility model is based on the brand new utility model conception, the sealing component and the corresponding pipeline are connected by adopting the pin etching locking mechanism, when the device is used, the device can be integrally connected to the pipeline through the hole on the valve core of the valve, the nut is driven to approach the connector by rotating the screw rod, the expansion sleeve is extruded, the expansion sleeve is expanded and then is tightly supported on the inner wall of the fixed seat, the pipeline is plugged, the operation of replacing the component can be realized, and after the operation is finished, the pin etching locking mechanism can be pin etched and unlocked under the corrosive action of the medium in the pipeline, so that the device can be taken out, and the pipeline and the monitoring device can be recovered to work normally. The device disclosed by the utility model can achieve the effect of plugging the monitoring hole of the corrosion monitoring device under pressure based on the temporary plugging measure.

Furthermore, the pin etching locking mechanism comprises a lock tongue hinged to the connector, the lock tongue is provided with a folding position folded to the connector and a locking position unfolded, a limiting body which is matched with the lock tongue in a blocking mode to limit the lock tongue to the locking position is arranged on the connector, and the limiting body is a pin etching body. By adopting the arrangement with the folding position and the locking position, no (low) resistance entering in the process of inserting the pipeline can be realized.

Furthermore, the lock bolts are arranged around the connector and share the limiting body. More than two lock bolts have more reliable locking effect, and each shared limiting body simplifies the structure of the device.

Further, the lock bolts are uniformly arranged around the connector. The evenly arranged bolts will provide a more even locking force, contributing to a more reliable locking.

Further, the lock tongue is an eccentric lock tongue. Compared with other special-shaped lock bolts, the eccentric lock bolt is simpler in structure.

Furthermore, one end of the screw rod, which is opposite to the connector, is provided with a matching bayonet used for being in transmission fit with the connecting rod of the pick-and-place device. The matched bayonet can provide convenience for operating the screw rod.

Still further, the mating bayonet is provided at the end of the screw. The matched bayonet is arranged at the end part of the screw rod, so that the operation is more convenient.

Furthermore, a rotation stopping groove is formed in the outer side of the nut and is used for being in rotation stopping fit with a sliding key on the fixing seat. The outer side of the nut is provided with a rotation stopping groove, so that the nut can be more reliably prevented from rotating, and the failure of propping the expansion sleeve is avoided.

Further, the limiting body is an aluminum block, a magnesium block or a zinc block. The aluminum block, the magnesium block or the zinc block is a pin corrosion material which is easy to obtain, and has the advantage of low cost.

Further, the screw rod is in rotary fit with the connector through a T-shaped connector. The T-shaped connector rotating and matching structure has the advantages of compact structure and easy assembly.

Drawings

FIG. 1 is a schematic view of a longitudinal sectional structure of an on-line plugging device for a corrosion monitoring device along a pipeline;

FIG. 2 is a schematic diagram of an on-line plugging device for a corrosion monitoring device in a cross-sectional view along a pipeline;

FIG. 3 is a schematic view of the structure of the on-line plugging device for the corrosion monitoring device in use;

fig. 4 is a schematic structural view of the corrosion monitoring device when the limit body of the online plugging device is removed after pin corrosion.

Reference numerals illustrate:

1. a pipe connection assembly; 11. eccentric bolt; 12. an aluminum block; 2. an expansion sleeve; 3. a screw rod; 31. a nut; 32. fitting a bayonet; 4. a fixing seat; 5. the pipe wall.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

The present utility model is described in further detail below with reference to examples.

The specific embodiment 1 of the online plugging device for the corrosion monitoring device provided by the utility model comprises the following components:

as shown in fig. 1 and 2, when the online plugging device for the corrosion monitoring device provided by the embodiment is in the fixing seat 4 of the corrosion monitoring device, the fixing seat 4 is welded outside the monitoring hole of the pipe wall 5, and a ball valve and other related components (not shown in the drawings) of the corrosion monitoring device are also arranged above the fixing seat 4. The on-line plugging device for the corrosion monitoring device comprises a pipeline connecting assembly 1, wherein an eccentric lock tongue 11 capable of being opened and rotated freely is rotatably arranged at the lower end of a connector of the pipeline connecting assembly 1, an aluminum block 12 capable of being corroded in an oil-gas environment of a pipeline is further arranged between the two eccentric lock tongues 11 to serve as a limiting body, and when the limiting body is intact, the eccentric lock tongue 11 can only be opened to a set angle value under the action of gravity and is positioned at a locking position. The aluminum blocks 12 are positioned at one end of each eccentric lock tongue 11 close to each other, and the eccentric lock tongues 11 are uniformly distributed on the circumference of the aluminum blocks 12.

The upper end of the pipeline connecting assembly 1 is rotatably provided with a screw rod 3 which can rotate freely relative to the pipeline connecting assembly, the outer side of the screw rod 3 is provided with threads and sleeved with a nut 31, and a rotation stopping groove matched with the fixing seat 4 is formed in the outer side of the nut 31, so that the processing cost and processing difficulty of the nut 31 and the screw rod 3 can be further simplified, the production is facilitated, the screw rod 3 and the nut 31 can form a screw rod nut mechanism, and the screw rod 3 can be rotated on the pipeline connecting assembly 1 to enable the nut 31 to move up and down on the screw rod 3. An expansion sleeve 2 made of high-elastic rubber is sleeved between the nut 31 and the pipeline connecting assembly 1, the upper end and the lower end of the expansion sleeve 2 are respectively abutted against the lower end face of the nut 31 and the cylinder seat of the pipeline connecting assembly 1, and when the nut 31 is positioned at the top end of the screw rod 3, the expansion sleeve 2 is in an initial length, so that the length of the expansion sleeve 2 can be maximized, a better and more sufficient sealing effect is provided after compression expansion, and the plugging performance is improved. The upper end of the screw rod 3 is also provided with a matching bayonet 32, and the connecting rod and the screw rod 3 can be in transmission connection through the matching bayonet 32, so that the screw rod 3 rotates along with the connecting rod through rotating the connecting rod, the nut 31 is further enabled to press the expansion sleeve 2, the expansion sleeve 2 is expanded outwards after being pressed, and a tight sealing structure can be formed between the online plugging device for the corrosion monitoring device and the inner wall of the fixed seat 4. The adoption of the screw nut mechanism can enable the transmission effect to be stable, can provide continuous, stable and reliable pressure for the expansion sleeve 2, prevents the expansion sleeve 2 from retracting, and has the advantages of simple integral structure and easy control of radial dimension.

The online plugging device for the corrosion monitoring device adopts a brand new technical conception, the rotation angle of the eccentric lock tongue 11 is limited by utilizing the pin-erodable characteristic of the limiting body so as to stop the eccentric lock tongue from the pipe wall 5, a time-controllable clamping effect can be provided, and in addition, a compressed expandable expansion sleeve 2 sleeved on the screw nut mechanism is utilized to form a tight sealing effect between the fixed seat 4 and the monitoring hole after being compressed, so that the monitoring hole is effectively plugged. Through set up cooperation bayonet socket 32 and connecting rod transmission cooperation on this plugging device, still can be under the circumstances of not dismantling the relevant part of corrosion monitoring device, the monitoring hole that independently drops to the corrosion monitoring device below utilizes eccentric spring bolt 11 to block the chucking to through rotating the connecting rod from outside and driving screw nut mechanism roof pressure expansion shell 2 inflation seal, carry out online shutoff, can take out the connecting rod afterwards, so that carry out online maintenance to the valve of corrosion monitoring device fixing base 4 top and other relevant spare part under the circumstances of not stopping production and change.

In this embodiment, the bayonet 32 is adapted to the connecting rod of the pick-and-place device of the corrosion monitoring device, so that the plugging device can be connected with the existing pick-and-place device for lowering the inner core of the corrosion monitoring device, so that the applicability of the plugging device is better, and the operation is more convenient.

In this embodiment, setting the eccentric bolt 11 as two symmetrical parts can simplify and compact the plugging device structure and ensure stable clamping effect, and the eccentric bolt 11 is also provided with a wedge-shaped clamping surface for clamping with the pipe wall 5, so that the whole stress effect is more balanced and the aluminum block is more convenient to extrude.

In this embodiment, the limiting body is an aluminum block 12, which has a fast corrosion rate due to oil gas in the pipeline, and can complete pin corrosion within one to two days, so that enough maintenance and equipment replacement time is provided, and meanwhile, severe reaction is not caused like other more active metals, and normal production is not affected due to overlong pin corrosion time. And the rotation angle of the eccentric bolt 11 limited by the aluminum block 12 is 90 degrees, so that the size and shape of the limiting body can be better controlled to be attached to the surface of the eccentric bolt 11, the attachment of the eccentric bolt 11 and the pipe wall 5 is also facilitated, and the clamping effect is improved.

In this embodiment, the corrosion monitoring device is with online plugging device whole for cylindric structure and external diameter equals the aperture of waiting to shutoff monitoring hole to this space utilization who improves monitoring hole department as far as, is convenient for more high-efficient shutoff.

The online plugging device for the corrosion monitoring device can be connected with the taking and placing device firstly, then the taking and placing device is used for placing the online plugging device, the ball valve is opened to form a straight channel which is communicated up and down when the ball body of the ball valve is placed down, then the ball valve is continuously inserted into the inner side of the pipe wall 5 downwards, as shown in fig. 3, two eccentric lock tongues 11 of the pipe connecting assembly 1 are opened from 0 DEG to 90 DEG under the action of gravity and are blocked by an aluminum block 12, at the moment, the online plugging device for the corrosion monitoring device can be properly rotated to enable the direction of the eccentric lock tongues 11 to be consistent with the longitudinal direction of the pipe, then the taking and placing device is lifted upwards to form a support with the inner side of the pipe wall 5 so as to be firmly clamped, then the taking and placing device connecting rod is rotated to drive the screw rod 3 to rotate together, so that the nut 31 moves downwards, the expansion sleeve 2 is compressed to expand an annular space between the sealing fixing seat 4 and the online plugging device for the corrosion monitoring device, the medium in the pipe is prevented from flowing out, the online plugging device can be detached by the online plugging device, the monitoring hole is kept plugging effect after the taking and placing device is taken out, and the ball valve is not closed. And then, any parts including the ball valve above the fixed seat 4 can be overhauled and replaced. As shown in fig. 4, as the aluminum block 12 is gradually eroded and dissolved under the corrosion of the oil gas medium in the pipeline, the eccentric lock tongue 11 is eventually insufficient to stop the eccentric lock tongue 11, the eccentric lock tongue 11 naturally falls down and folds down, at this time, the pick-and-place device can be lowered again to be in transmission connection with the matched bayonet 32, the nut 31 is moved upwards by the reverse rotation of the pick-and-place device connecting rod, the expansion sleeve 2 is reset, then the corrosion monitoring device is taken out from the original path of the online plugging device by the pick-and-place device, the ball valve is required to be closed immediately after the corrosion monitoring device is withdrawn from the ball valve by the online plugging device, and then normal monitoring work can be continuously carried out.

Therefore, the online plugging device for the corrosion monitoring device provided by the utility model has the advantages that the plugging monitoring hole is plugged under pressure (the pressure is less than or equal to 2 MPa), the overall structure is simpler and more compact, the operation is convenient, the plugging effect is better, and the problem that the existing corrosion monitoring device is difficult to plug the monitoring hole under pressure for overhauling and replacing parts such as a valve is solved.

The specific example 2 of the online plugging device for the corrosion monitoring device provided by the utility model is as follows:

in embodiment 1 of the online plugging device for the corrosion monitoring device according to the utility model, the fitting bayonet 32 is provided at the end of the screw 3 and is adapted to the pick-and-place rod. In this embodiment, the mating bayonet 32 may also be configured to mate with a conventional link.

Specific example 3 of an online plugging device for a corrosion monitoring device provided by the utility model:

in embodiment 1 of the online plugging device for the corrosion monitoring device of the present utility model, the rotation stopping structure is a rotation stopping groove arranged at the outer side of the nut 31, and the rotation stopping groove is used for being in rotation stopping fit with a clamping key on the fixing seat 4. In this embodiment, the rotation stopping structure may also be a through hole formed in the nut 31 and a long rod inserted into the through hole and fixedly connected to the corrosion monitoring device by a static structure on the online plugging device. In other embodiments, the rotation stopping structure can be omitted, and the rotation stopping of the nut can be realized through friction fit between the expansion sleeve and the expansion sleeve.

Specific example 4 of an online plugging device for a corrosion monitoring device provided by the utility model:

in example 1 of the on-line plugging device for the corrosion monitoring device of the present utility model, the initial length of the expansion shell 2 is equal to the distance from the pipe connection assembly 1 when the nut 31 is located at the end of the lead screw 3. In this embodiment, the initial length of the expansion shell 2 may be shorter than that described in embodiment 1, but it is necessary to ensure that the annular space between the anchor block 4 and the in-line plugging device for the corrosion monitoring device is effectively sealed after the expansion shell is compressed and expanded.

Specific example 5 of an online plugging device for a corrosion monitoring device provided by the utility model:

in example 1 of the on-line plugging device for corrosion monitoring apparatus according to the present utility model, the pipe connection assembly 1 is provided with at least two eccentric bolts 11. In this embodiment, when the diameter of the pipe is large enough, the eccentric bolts 11 can be uniformly distributed three or even four to provide more effective clamping. Of course, for locking purposes, it is also possible to provide only one over-center tongue. The tongue may be provided with a spring drive, and the spring or the spring may be provided with a lockable body.

Specific example 6 of an online plugging device for a corrosion monitoring device provided by the utility model:

in example 1 of the online plugging device for the corrosion monitoring device of the present utility model, the limiting body is an aluminum block 12. In this embodiment, the limiting body may be a magnesium block or a zinc block, or other metal blocks with low cost and moderate pin corrosion rate.

Specific example 7 of an online plugging device for a corrosion monitoring device provided by the utility model:

in example 1 of the online plugging device for a corrosion monitoring device of the present utility model, the whole of the online plugging device for a corrosion monitoring device is a cylindrical structure, and the outer diameter of the cylindrical structure is equal to the aperture of a monitoring hole to be plugged. In this embodiment, the outer diameter of the cylindrical structure is smaller than the diameter of the monitoring hole to be plugged, but it is required to ensure that the eccentric bolt 11 can be effectively clamped with the monitoring hole after being unfolded, and ensure that the expansion sleeve 2 can effectively seal the annular space between the fixing seat 4 and the on-line plugging device for the corrosion monitoring device after being compressed and expanded.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides an on-line plugging device for corrosion monitoring device, characterized by, includes pipeline coupling assembling and seal assembly, pipeline coupling assembling includes the connector, be equipped with on the connector and sell and corrode locking mechanism, seal assembly include with connector normal running fit's lead screw and with lead screw complex screw one side that is close to of screw is equipped with the inflation cover, the inflation cover is stopped between screw and the connector.

2. The on-line plugging device for corrosion monitoring device according to claim 1, wherein the pin corrosion locking mechanism comprises a lock tongue hinged to the connector, the lock tongue has a folded position folded to the connector and a locking position after being unfolded, and a limiting body which is in blocking fit with the lock tongue to limit the lock tongue in the locking position is arranged on the connector, and the limiting body is a pin corrosion body.

3. The online plugging device for corrosion monitoring devices according to claim 2, wherein the bolts are arranged around the connector in two or more ways, and each bolt shares the limiting body.

4. The on-line plugging device for corrosion monitoring devices of claim 3, wherein each of said locking bolts is uniformly disposed around the joint.

5. The on-line plugging device for corrosion monitoring devices according to claim 2, wherein the locking bolt is an eccentric locking bolt.

6. The online plugging device for the corrosion monitoring device according to any one of claims 1 to 5, wherein one end of the screw rod, which is opposite to the connector, is provided with a fitting bayonet for driving fit with a connecting rod of the pick-and-place device.

7. The on-line plugging device for corrosion monitoring devices according to claim 6, wherein said mating bayonet is provided at an end of the screw.

8. The online plugging device for the corrosion monitoring device according to claim 1, wherein a rotation stopping groove is formed in the outer side of the nut and is used for being in rotation stopping fit with a sliding key on the fixing seat.

9. The online plugging device for corrosion monitoring devices according to any one of claims 2 to 5, wherein the limiting body is an aluminum block, a magnesium block or a zinc block.

10. The on-line plugging device for corrosion monitoring devices according to any one of claims 1-5, wherein the screw is in a rotational fit with the connector via a T-joint.