CN112024214A - Corrosion inhibitor spraying and coating device for gathering and transportation pipeline and operation method thereof - Google Patents
Corrosion inhibitor spraying and coating device for gathering and transportation pipeline and operation method thereof Download PDFInfo
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- CN112024214A CN112024214A CN202010858130.4A CN202010858130A CN112024214A CN 112024214 A CN112024214 A CN 112024214A CN 202010858130 A CN202010858130 A CN 202010858130A CN 112024214 A CN112024214 A CN 112024214A
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- corrosion inhibitor
- gathering
- sprayer
- pipeline
- spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
- B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
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Abstract
The invention discloses a corrosion inhibitor spraying and coating device for a gathering and transportation pipeline and an operation method thereof, belonging to the field of corrosion prevention of oil and gas storage and transportation pipelines. The device comprises a pipe cleaner, a corrosion inhibitor liquid storage cylinder and a sprayer; the corrosion inhibitor liquid storage cylinder is used for storing the corrosion inhibitor, and the remote control switch box arranged at the front end is used for controlling the air bag mechanism to make the air bag pop out to ensure that the corrosion inhibitor is filled in the nozzle, so that the problem that the corrosion inhibitor cannot be sprayed due to no swabbing is avoided; the sprayer main body is a high-pressure gas storage bottle, high-pressure gas is sprayed out through the Venturi reducing pipe after being regulated by the dynamic pressure reducing valve, and vacuum is formed at the outlet of the Venturi reducing pipe, so that the corrosion inhibitor is pumped and sprayed out in a spraying mode, and corrosion inhibitor spraying and coating are completed. The device rotates and moves in the pipeline through the sprayer, so that the corrosion inhibitor is uniformly sprayed on the inner wall of the pipeline, the device is simple and convenient to operate, the instability of corrosion inhibitor spraying and coating can be overcome, the corrosion inhibitor spraying and coating in the gathering and transportation pipeline is ensured to be uniform and not to be damaged, and the device is suitable for being popularized in the market.
Description
Technical Field
The invention belongs to the technical field of corrosion prevention of oil and gas storage and transportation pipelines, and relates to a corrosion inhibitor spraying and coating device for a gathering and transportation pipeline and an operation method thereof.
Background
In a gas field gathering and transporting pipeline, because the transported gas is not processed, the gas often contains a large amount of acid corrosive gas and high-sulfur-content gas, when liquid accumulation is generated in the pipeline, the formed acid liquid can seriously corrode the pipeline, so that the pipeline is cracked and perforated, and serious accidents such as gas leakage, pipeline fracture and the like are caused.
At present, in order to slow down the corrosion of a gathering and transportation pipeline, a corrosion inhibitor pre-coating film is often carried out on the inner wall of the pipeline, a common method is that a film coating brush is used for carrying and coating the corrosion inhibitor on the inner wall of the pipeline, but due to the action of gravity, the film coating brush cannot coat the corrosion inhibitor on the top of the pipeline, so that the local corrosion of the pipeline is caused, in addition, in order to ensure the movement of the device in the pipeline, a sealing leather cup is mostly additionally arranged at the tail part of the device in the existing device, and the sealing leather cup causes serious damage to the coated corrosion inhibitor due to the friction effect with the pipeline, so.
The invention patent CN110252607A discloses a corrosion inhibitor coating film pig for a high-sulfur-content moisture gathering and transporting pipeline. When the corrosion inhibitor is sprayed out through the corrosion inhibitor spray head, the corrosion inhibitor is sprayed on the inner wall of an uncleaned pipeline and then is damaged by a sealing leather cup of the cleaned pipeline, so that the completeness of the sprayed corrosion inhibitor is invalid; in addition, due to the sealing of the sealing leather cup and the pipeline, residual liquid of the sprayed corrosion inhibitor can hardly reach between the circular brushes of the corrosion inhibitor coating, so that the circular brushes of the corrosion inhibitor coating can not play a role.
US6874193 discloses a spray-type corrosion inhibitor applicator. The core part of the device is a fan-shaped nozzle depending on the head, and the fan-shaped nozzle is a Venturi fan-shaped nozzle. The principle of the device is that venturi tube is utilized to enable gas for pushing a pipe cleaner to operate to be changed into low-pressure high-speed gas at the outlet of the venturi tube, liquid of a pipeline is sucked into a fan-shaped nozzle by utilizing the siphon principle, the liquid is carried by the high-speed gas and is sprayed together to form spray, and then corrosion inhibitor is sprayed on the inner wall of the pipeline. However, the device is seriously affected by gas behind the pipe cleaner in the operation process, so that the spraying is unstable, and the expected effect cannot be achieved.
Utility model patent CN210078881U, the device with hydrojet device, drive arrangement, motor with paint the roller and arrange the base in, the whole corrosion inhibitor of drive arrangement drive device of filming removes in the pipeline, removes in-process hydrojet device and spouts the inhibition earlier in pipeline inner wall in device the place ahead, later is paintd by the roller of paining at device rear once more. However, the driving wheels are only positioned below the base and are not uniformly distributed along the circumferential direction during the movement of the device in the pipeline, so that the device is easy to be inverted, and the corrosion inhibitor coating film is easy to fail.
Therefore, the problem to be solved by those skilled in the art is how to provide a corrosion inhibitor spraying and coating device for a gathering and transportation pipeline, which has stable spraying and uniform coating.
Disclosure of Invention
In view of the above, the present invention provides a corrosion inhibitor spraying and coating apparatus for a gathering and transportation pipeline, which is designed to overcome the instability of spraying during corrosion inhibitor spraying and coating, and ensure that the coating is uniform and not damaged.
In order to achieve the above purpose, the invention provides the following technical scheme:
a gathering and transportation pipeline corrosion inhibitor spraying and coating device is arranged inside a gathering and transportation pipeline; the spraying and coating device comprises a pipe cleaner, a corrosion inhibitor liquid storage cylinder and a sprayer; a coupler A and a coupler B are arranged at two ends of the corrosion inhibitor liquid storage cylinder, the corrosion inhibitor liquid storage cylinder is connected with the pipe cleaner through the coupler A, and the corrosion inhibitor liquid storage cylinder is connected with the sprayer through the coupler B;
the corrosion inhibitor liquid storage cylinder is a cylinder body with a hollow inner part; cover plates are arranged at two ends of the cylinder body, a remote switch box and a rotating mechanism are arranged on the cover plate positioned at the front end of the cylinder body, and a liquid outlet and the rotating mechanism are arranged on the cover plate positioned at the rear end of the cylinder body; a movable plate, a sliding rod and an air bag mechanism are arranged in the barrel; the air bag mechanism is positioned between the movable plate and the cover plate, the movable plate is sleeved on the sliding rods, and the sliding rods are uniformly distributed around the air bag mechanism along the circumferential direction;
the air bag mechanism consists of a remote switch box, an igniter, solid fuel, gas generating agent, a filter and an air bag; a container A containing the solid fuel, a container B containing the gas generating agent and a filter are sequentially arranged in the air bag from inside to outside; the igniter is positioned at one end of the container A, and the remote switch box is connected with the solid fuel through the igniter;
the rotating mechanism consists of a triangular support, a circular sleeve, a rotating sleeve, a telescopic supporting rod, a built-in spring, a roller support and a rolling wheel; the triangular support is sequentially provided with a circular sleeve, a rotary sleeve, a telescopic supporting rod and a roller support; the inner part of the rotating sleeve is provided with an internal spring which is connected with the telescopic supporting rod; the roller support is fixedly arranged on the telescopic supporting rod, and the rolling wheels are arranged on the roller support;
the main body of the sprayer is a high-pressure gas storage bottle; one end of the high-pressure gas storage bottle is provided with a one-way inflation valve, a gas outlet valve and the rotating mechanism, and the other end of the high-pressure gas storage bottle is provided with a plurality of spray nozzles and the rotating mechanism; one end of the air outlet valve is connected with the high-pressure gas storage cylinder, and the other end of the air outlet valve is connected with the air inlet pipe; the air inlet pipe penetrates through the inside of the high-pressure gas storage bottle, one end of the air inlet pipe is connected with the bypass pipe and sealed by the sealing gasket, and a plurality of Venturi reducing pipes are uniformly distributed at the other end of the air inlet pipe; a dynamic pressure reducing valve is arranged in the bypass pipe; a liquid inlet pipe is sleeved outside the air inlet pipe, a plurality of fan-shaped nozzles are uniformly distributed at one end of the liquid inlet pipe, and a liquid inlet is formed in the other end of the liquid inlet pipe;
a cylindrical valve core, a valve rod, a spring supporting plate and a sealing gasket are arranged in a valve body of the dynamic pressure reducing valve; one end of the valve rod is in threaded connection with the cylindrical valve core, and the other end of the valve rod is connected with the bypass pipe; the valve rod and the spring support plate are sealed through the sealing gasket; and a spring is arranged on the spring supporting plate and sleeved outside the valve rod.
Preferably, the coupling A consists of a threaded connector A, a front thrust bearing, a rear thrust bearing, a rotating shaft, a cross ring and a threaded connector B;
the threaded connector A and the threaded connector B are respectively positioned at two ends of the coupler A; the threaded connector A is connected with the corrosion inhibitor liquid storage cylinder, and the threaded connector B is connected with the rotating shaft through the cross ring;
the rotating shaft is arranged in the threaded connector A, and the rotating shaft is located between the front thrust bearing and the rear thrust bearing.
It should be noted that the coupling a and the coupling B are respectively composed of a threaded connector, a front thrust bearing, a rear thrust bearing, a rotating shaft, a cross ring and a threaded connector.
Further preferably, at least one sealing leather cup is arranged on the outer periphery of the pipe cleaner in a sleeved mode, and the rear end of the pipe cleaner is connected with the threaded connector B.
Preferably, the liquid outlet is connected with the coupling B, and a gland nut is sleeved outside the liquid outlet.
Preferably, the container A is provided with a jet orifice, and the container B is provided with an air outlet.
Preferably, the roots of the circular sleeve and the rotary sleeve are provided with a plurality of threaded positioning holes; and a positioning bolt is arranged on the rotary sleeve.
Preferably, the rotating sleeve is rotated to enable the rolling wheel and the axis of the gathering and transportation pipeline to form a certain included angle, and the rolling wheel and the axis of the gathering and transportation pipeline are fixed through the positioning bolt.
Preferably, the liquid inlet is connected with the liquid outlet through a metal hose.
Preferably, the spraying head is installed at one end of the liquid inlet pipe, and the spraying head is circumferentially arranged on the liquid inlet pipe.
The invention also provides an operation method of the corrosion inhibitor spray coating device for the gathering and transportation pipeline, which comprises the following steps:
a. filling high-pressure gas into a high-pressure gas storage bottle of the sprayer through a one-way inflation valve outside the gathering and transportation pipeline, filling a corrosion inhibitor into a corrosion inhibitor liquid storage cylinder, connecting a liquid outlet of the corrosion inhibitor liquid storage cylinder with a liquid inlet of the sprayer through a metal hose, rotating a rotary sleeve of a rotary mechanism to enable a rolling wheel to form a certain included angle with the axis of the pipeline, positioning through a positioning bolt, connecting a pipe cleaner, the corrosion inhibitor liquid storage cylinder and the sprayer through a coupler, placing the connected corrosion inhibitor spraying and coating device into the pipeline, and opening an air outlet valve of the sprayer;
b. the remote control switch box is controlled by a remote controller from the outside, so that the air bag mechanism works to burst the air bag, the movable plate is pushed to move, and the corrosion inhibitor liquid is provided with certain pressure to enter a liquid inlet pipe of the sprayer from a liquid outlet and fill the whole fan-shaped nozzle;
c. high-pressure gas of a high-pressure gas storage bottle in the sprayer enters the gas inlet pipe through the gas outlet valve, the high-pressure gas is decompressed by the dynamic pressure reducing valve and then is sprayed out through the Venturi reducer, vacuum is formed at the outlet of the Venturi reducer, so that the formed high-speed gas is swabbed and carries the corrosion inhibitor, and spray mist is formed through the fan-shaped nozzle and sprayed on the inner wall of the pipeline to form a corrosion inhibitor protective film;
d. the pipe cleaner is pushed by the air pressure at the back, the coupling provides tension for the corrosion inhibitor liquid storage cylinder and the sprayer, so that the whole device runs in the pipeline, the rotating mechanism decomposes a circumferential rotating speed from the axial speed to rotate the sprayer and the corrosion inhibitor liquid storage cylinder, and the corrosion inhibitor is sprayed more uniformly to finally finish the spray coating operation of the corrosion inhibitor in the gathering and transportation pipeline.
Compared with the prior art, the invention discloses a corrosion inhibitor spraying and coating device for a gathering and transportation pipeline and an operation method thereof, and the device has the advantages that:
(1) the invention discloses a corrosion inhibitor liquid storage cylinder which is hollow inside and used for storing a corrosion inhibitor, wherein an air bag mechanism is arranged in the corrosion inhibitor liquid storage cylinder, a remote control switch box is used for controlling the air bag mechanism, and a remote controller is used for opening the air bag mechanism outside to enable an air bag to pop out, so that the corrosion inhibitor is ensured to fill the whole nozzle at any time, and the problem that the corrosion inhibitor cannot be sprayed due to the fact that the corrosion inhibitor cannot be pumped is avoided;
(2) the invention discloses a sprayer which is protected, wherein a high-pressure air reservoir is arranged in the sprayer, high-pressure air of the high-pressure air reservoir enters an air inlet pipe and a bypass pipe through an air outlet valve, and a dynamic pressure reducing valve is arranged in the bypass pipe and can keep the pressure reaching a nozzle within a certain range so as to ensure stable and uniform spraying;
(3) the rotating mechanism disclosed and protected by the invention enables the sprayer to keep rotating in the moving process, thereby avoiding the increase of the consumption of the corrosion inhibitor due to the overlapping of the range of the nozzles and the excessive number of the nozzles.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a corrosion inhibitor spray coating device for a gathering pipeline in a pipeline according to an embodiment of the invention.
Fig. 2 is a cross-sectional view and a partial schematic view of a corrosion inhibitor reservoir according to an embodiment of the invention.
Fig. 3 is a cross-sectional view of a nebulizer and a partial schematic view thereof, according to an embodiment of the invention.
Fig. 4 is a schematic partial cross-sectional view of a coupling according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view of an airbag mechanism provided in accordance with an embodiment of the present invention.
In the drawings: 1-a pipe cleaner; 2-corrosion inhibitor liquid storage cylinder; 3-sprayer; 4-coupling A; 5-a coupler B; 6-a rotating mechanism; 7-metal hose; 8-a pipeline; 9-a spray head; 10-high pressure gas cylinder; 11-an air outlet valve; 12-a dynamic pressure reducing valve; 13-a by-pass pipe; 14-a cylindrical valve core; 15-sealing ring; 16-a spring support plate; 17-a gasket; 18-a spring; 19-a valve stem; 20-an air inlet pipe; 21-liquid inlet pipe; 22-liquid inlet; 23-a venturi reducer; 24-a fan nozzle; 25-one-way inflation valve; 26-a liquid outlet; 27-a compression nut; 28-a front thrust bearing; 29-rear thrust bearing; 30-an air bag mechanism; 31-remote control switch box; 32-a movable plate; 33-a slide bar; 34-a cover plate; 35-a telescopic support bar; 36-circular sleeve; 37-innerspring; 38-rotating the sleeve; 39-positioning bolts; 40-thread positioning holes; 41-a rolling wheel; 42-roller support; 43-triangular support; 44-rotating shaft; 45-threaded connector A; 46-a cross-shaped ring; 47-threaded connection B; 48-an igniter; 49-solid fuel; 50-an ejection port; 51-a gas generant; 52-air outlet; 53-a filter; 54-air bag.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the corrosion inhibitor spraying and coating device for the gathering and transportation pipeline provided by the invention comprises a pipe cleaner 1, a coupler A4, a corrosion inhibitor liquid storage cylinder 2, a coupler B5, a sprayer 3 and a metal hose 7;
wherein:
at least one sealing leather cup is sleeved on the periphery of the pipe cleaner 1, and the rear end of the pipe cleaner 1 is connected with a threaded connector B47 of the coupling A4;
referring to fig. 2, the corrosion inhibitor storage cylinder 2 is hollow inside for storing corrosion inhibitor; the front end of the cylinder body is provided with a remote switch box 31 and a rotating mechanism 6; and is connected with a threaded connector A45 of a coupler A4; a liquid outlet 26 and a rotating mechanism 6 are arranged at the rear end of the cylinder, the liquid outlet 26 is positioned between a front thrust bearing 28 and a rear thrust bearing 29, the liquid outlet 26 is tightly pressed by a pressing nut 27, and the periphery of the liquid outlet 26 is sealed by a sealing ring 15; a movable plate 32, a sliding rod 33 and an air bag mechanism 30 are arranged in the barrel; the sliding rods 33 are evenly distributed around the air bag mechanism 30 along the circumferential direction; the movable plate 32 is sleeved on the sliding rod 33 and can push the corrosion inhibitor to move towards the liquid outlet 26 along the sliding rod 33; the airbag mechanism 30 is located between the movable plate 32 and the cover plate 34;
referring to fig. 3, the main body of the sprayer 3 is a high-pressure gas cylinder 10; the front end of the high-pressure gas storage cylinder 10 is provided with a one-way inflation valve 25, an air outlet valve 11 and a rotating mechanism 6; the one-way inflation valve 25 is used for inflating high-pressure gas into the high-pressure gas storage cylinder outside the pipeline; one end of the air outlet valve 11 is connected with the high-pressure gas storage cylinder 10, and the other end is connected with the air inlet pipe 20; the air inlet pipe 20 is connected with the bypass pipe 13 and sealed by a sealing gasket 17, and a plurality of Venturi reducers 23 are uniformly distributed at the rear end of the air inlet pipe 20; a dynamic pressure reducing valve 12 is arranged in the bypass pipe 13; the cylinder body of the high-pressure gas storage cylinder 10 is penetrated by a liquid inlet pipe 21; the rear end of the liquid inlet pipe 21 is uniformly distributed with a plurality of fan-shaped nozzles 24, the front end of the liquid inlet pipe 21 is provided with a liquid inlet 22 connected with the metal hose 7, and the front end of the liquid inlet pipe 21 is connected with a threaded connector A45 of a coupler B5; the air inlet pipe 20 enters the liquid inlet pipe 21 from the front end of the liquid inlet pipe 21 and reaches the rear end of the liquid inlet pipe 21; the rear end of the high-pressure gas storage cylinder 10 is provided with a plurality of spray nozzles 9 and a rotating mechanism 6 on a liquid inlet pipe 21 along the circumferential direction; the rotating mechanism 6 decomposes a circumferential rotating speed from an axial speed to rotate the sprayer 3;
referring to fig. 1, a tube cleaner 1 is connected with a corrosion inhibitor liquid storage cylinder 2 through a coupling A4, the corrosion inhibitor liquid storage cylinder 2 is connected with a sprayer 3 through a coupling B45, a liquid outlet 26 of the corrosion inhibitor liquid storage cylinder 2 is connected with a liquid inlet 22 of the sprayer 3 through a metal hose 7, and then the corrosion inhibitor liquid storage cylinder and the sprayer are integrally arranged in a pipeline; as shown in figure 1, high-pressure gas is injected into the right side of the pipeline 8, the whole device moves forwards under the pushing of the gas pressure, the rotating mechanism 6 rotates to drive the corrosion inhibitor liquid storage cylinder 2 and the sprayer 3 to rotate, and the corrosion inhibitor atomized by the sprayer 3 is utilized, so that the corrosion inhibitor is uniformly coated on the inner wall of the pipeline 8.
Further, as shown in fig. 3, a cylindrical valve core 14, a valve rod 19, a spring 18, a spring support plate 16 and a gasket 17 are arranged in the valve body of the dynamic pressure reducing valve 12;
the cylindrical valve core 14 is connected with one end of a valve rod 19 through threads, the valve rod 19 is sealed with a spring support plate 16 through a sealing ring 15, and the other end of the valve rod 19 is a circular plate with the same diameter as the bypass pipe 13; the seal ring 17 may be made of, for example, a flexible graphite packing having a small friction coefficient and a high rebound resilience, but the present invention is not limited thereto.
The spring 18 is sleeved on the valve rod 19 and is arranged on the spring support plate 16;
wherein the dynamic pressure reducing valve 12 starts to work when the air outlet valve 11 on the sprayer is opened. Namely: after the gas outlet valve 11 is opened, high-pressure gas simultaneously enters the gas inlet pipe 20 and the bypass pipe 13 connected with the gas inlet pipe 20, the high-pressure gas generates pressure at one end of the valve rod 19, so that the compression spring 18 enables the cylindrical valve core 14 to move towards the gas inlet pipe 20, the gas flow cross section area of the gas inlet pipe 20 is reduced, and the purpose of pressure reduction is achieved.
Further, as shown in fig. 4, the coupling 4 is composed of a threaded connector a45, a front thrust bearing 29, a rear thrust bearing 28, a rotating shaft 44, a cross-shaped ring 46 and a threaded connector B47;
the rotating shaft 44 is located between the front thrust bearing 28 and the rear thrust bearing 29 and is disposed in the threaded connector a 45;
the threaded connector B47 is connected with the rotating shaft 44 through a cross ring 46; the thrust bearing is used for enabling the rotating shaft 44 to bear the tensile force generated by the corrosion inhibitor liquid storage cylinder 2 and the sprayer 3 and ensuring the rotation of the rotating shaft 44.
Further, as shown in fig. 5, the airbag mechanism 30 is composed of a remote switch box 31, an igniter 48, a solid fuel 49, a gas generating agent 51, a filter 53, and an airbag 54;
the igniter 48 is controlled by the remote switch box 31 to ignite and ignite the solid fuel 49; the solid fuel 49 is burned through the injection port 50 and reacts with the gas generating agent 51; the gas generated after the reaction of the gas generating agent 51 enters the filter 53 through the gas outlet 52, and enters the air bag 54 after being filtered by the filter 53;
in one embodiment, when the device is connected and placed in the pipeline 8 to start working, the remote control switch box 31 is remotely controlled by using a remote controller outside the pipeline 8, so that the air bag mechanism 30 works, the air bag 54 is popped out to give a certain pressure to the corrosion inhibitor liquid, and the corrosion inhibitor liquid is ensured to be filled in the whole spray head 9 all the time in the working process, and the spray coating failure caused by the fact that the corrosion inhibitor liquid cannot be pumped is avoided.
Further, as shown in fig. 2, the rotating mechanism is composed of a triangular support 43, a circular sleeve 36, a rotating sleeve 38, a telescopic support rod 35, an internal spring 37, a roller support 42 and a rolling wheel 41;
a circular sleeve 36 is mounted on the triangular support, a plurality of threaded positioning holes 40 are formed in the circular sleeve 36, and a plurality of threaded positioning holes 40 are also formed in the root of the rotary sleeve 38;
the built-in spring 37 is positioned in the rotating sleeve 38, and the telescopic supporting rod 35 is positioned on the built-in spring 37 of the rotating sleeve 38;
the rolling wheel 41 is positioned on the roller support 42, and the roller support 42 is fixed on the telescopic support rod 35;
the rotating sleeve 38 is rotated to make the rolling wheel 41 form an angle with the pipeline axis and fixed by the positioning bolt 39.
In addition, the invention also provides an operation method of the corrosion inhibitor spray coating device for the gathering and transportation pipeline, which comprises the following specific steps:
a. filling high-pressure gas into a high-pressure gas cylinder 10 of a sprayer 3 through a one-way inflation valve 25 outside a pipeline, filling a corrosion inhibitor into a corrosion inhibitor liquid storage cylinder 2, connecting a liquid outlet 26 of the corrosion inhibitor liquid storage cylinder 2 with a liquid inlet 22 of the sprayer 3 through a metal hose 7, rotating a rotary sleeve 38 of a rotary mechanism 6 to enable a rolling wheel 41 to form a certain included angle with the axis of the pipeline, positioning through a positioning bolt 39, finally connecting the pipe cleaner 1, the corrosion inhibitor liquid storage cylinder 2 and the sprayer 3 through a coupler, placing the connected corrosion inhibitor spraying and coating device into the pipeline, and opening an air outlet valve 11 of the sprayer 3;
b. the remote control switch box 31 is controlled by the remote controller from the outside, so that the air bag mechanism 30 works to burst the air bag 55, and the movable plate 32 is pushed to move, so that the corrosion inhibitor liquid is provided with certain pressure to enter the liquid inlet pipe 21 of the sprayer 3 from the liquid outlet 26 and fill the whole fan-shaped nozzle 24;
c. high-pressure gas of a high-pressure gas storage bottle 10 in the sprayer 3 enters an air inlet pipe 20 through an air outlet valve 11, the high-pressure gas is decompressed by a dynamic pressure reducing valve 12 and then is sprayed out through a Venturi reducer 23, vacuum is formed at the outlet of the Venturi reducer 23, so that the formed high-speed gas is swabbed and carries a corrosion inhibitor, and spray mist is formed through a fan-shaped nozzle 24 and sprayed on the inner wall of a pipeline to finally form a corrosion inhibitor protective film;
d. the cleaning device 1 provides pulling force for the corrosion inhibitor liquid storage cylinder 2 and the sprayer 3 through the coupler under the pushing of the back gas pressure, so that the whole device runs in the pipeline, the rotating mechanism 6 decomposes a circumferential rotating speed from the axial speed to rotate the sprayer 3 and the corrosion inhibitor liquid storage cylinder 2, thereby the spraying of the corrosion inhibitor is more uniform, and the spraying and coating operation of the corrosion inhibitor in the gathering and transportation pipeline is finally completed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A gathering and transportation pipeline corrosion inhibitor spraying and coating device is characterized in that the spraying and coating device is arranged inside a gathering and transportation pipeline; the spraying and coating device comprises a pipe cleaner, a corrosion inhibitor liquid storage cylinder and a sprayer; a coupler A and a coupler B are arranged at two ends of the corrosion inhibitor liquid storage cylinder, the corrosion inhibitor liquid storage cylinder is connected with the pipe cleaner through the coupler A, and the corrosion inhibitor liquid storage cylinder is connected with the sprayer through the coupler B;
the corrosion inhibitor liquid storage cylinder is a cylinder body with a hollow inner part; cover plates are arranged at two ends of the cylinder body, a remote switch box and a rotating mechanism are arranged on the cover plate positioned at the front end of the cylinder body, and a liquid outlet and the rotating mechanism are arranged on the cover plate positioned at the rear end of the cylinder body; a movable plate, a sliding rod and an air bag mechanism are arranged in the barrel; the air bag mechanism is positioned between the movable plate and the cover plate, the movable plate is sleeved on the sliding rods, and the sliding rods are uniformly distributed around the air bag mechanism along the circumferential direction;
the air bag mechanism consists of a remote switch box, an igniter, solid fuel, gas generating agent, a filter and an air bag; a container A containing the solid fuel, a container B containing the gas generating agent and a filter are sequentially arranged in the air bag from inside to outside; the igniter is positioned at one end of the container A, and the remote switch box is connected with the solid fuel through the igniter;
the rotating mechanism consists of a triangular support, a circular sleeve, a rotating sleeve, a telescopic supporting rod, a built-in spring, a roller support and a rolling wheel; the triangular support is sequentially provided with a circular sleeve, a rotary sleeve, a telescopic supporting rod and a roller support; the inner part of the rotating sleeve is provided with an internal spring which is connected with the telescopic supporting rod; the roller support is fixedly arranged on the telescopic supporting rod, and the rolling wheels are arranged on the roller support;
the main body of the sprayer is a high-pressure gas storage bottle; one end of the high-pressure gas storage bottle is provided with a one-way inflation valve, a gas outlet valve and the rotating mechanism, and the other end of the high-pressure gas storage bottle is provided with a plurality of spray nozzles and the rotating mechanism; one end of the air outlet valve is connected with the high-pressure gas storage cylinder, and the other end of the air outlet valve is connected with the air inlet pipe; the air inlet pipe penetrates through the inside of the high-pressure gas storage bottle, one end of the air inlet pipe is connected with the bypass pipe and sealed by the sealing gasket, and a plurality of Venturi reducing pipes are uniformly distributed at the other end of the air inlet pipe; a dynamic pressure reducing valve is arranged in the bypass pipe; a liquid inlet pipe is sleeved outside the air inlet pipe, a plurality of fan-shaped nozzles are uniformly distributed at one end of the liquid inlet pipe, and a liquid inlet is formed in the other end of the liquid inlet pipe;
a cylindrical valve core, a valve rod, a spring supporting plate and a sealing gasket are arranged in a valve body of the dynamic pressure reducing valve; one end of the valve rod is in threaded connection with the cylindrical valve core, and the other end of the valve rod is connected with the bypass pipe; the valve rod and the spring support plate are sealed through the sealing gasket; and a spring is arranged on the spring supporting plate and sleeved outside the valve rod.
2. The corrosion inhibitor spray coating device for the gathering and transportation pipeline as claimed in claim 1, wherein the coupling A is composed of a threaded connector A, a front thrust bearing, a rear thrust bearing, a rotating shaft, a cross ring and a threaded connector B;
the threaded connector A and the threaded connector B are respectively positioned at two ends of the coupler A; the threaded connector A is connected with the corrosion inhibitor liquid storage cylinder, and the threaded connector B is connected with the rotating shaft through the cross ring;
the rotating shaft is arranged in the threaded connector A, and the rotating shaft is located between the front thrust bearing and the rear thrust bearing.
3. The corrosion inhibitor spray coating device for the gathering and transportation pipeline as claimed in claim 2, wherein at least one sealing leather cup is sleeved on the outer periphery of the pipe cleaner, and the rear end of the pipe cleaner is connected with the threaded connector B.
4. The corrosion inhibitor spray coating device for the gathering and transportation pipeline as claimed in claim 1, wherein the liquid outlet is connected with the coupling B, and a gland nut is sleeved outside the liquid outlet.
5. The corrosion inhibitor spray coating device for the gathering and transportation pipeline according to claim 1, wherein the container A is provided with a spray opening, and the container B is provided with an air outlet.
6. The corrosion inhibitor spray coating device for the gathering and transportation pipeline as claimed in claim 1, wherein the root parts of the circular sleeve and the rotary sleeve are provided with a plurality of threaded positioning holes; and a positioning bolt is arranged on the rotary sleeve.
7. The corrosion inhibitor spraying and coating device for the gathering and transportation pipeline as claimed in claim 6, wherein the rotating sleeve is rotated to enable the rolling wheel to form a certain included angle with the axis of the gathering and transportation pipeline, and the rolling wheel is fixed by the positioning bolt.
8. The corrosion inhibitor spray coating device for the gathering and transportation pipeline as claimed in claim 1, wherein the liquid inlet is connected with the liquid outlet through a metal hose.
9. The corrosion inhibitor spraying and coating device for the gathering and transportation pipeline according to claim 1, wherein the spraying head is installed at one end of the liquid inlet pipe, and the spraying head is circumferentially arranged on the liquid inlet pipe.
10. An operation method of the corrosion inhibitor spraying and coating device for the gathering and transportation pipeline as claimed in any one of claims 1 to 9, wherein the method comprises the following steps:
a. filling high-pressure gas into a high-pressure gas storage bottle of the sprayer through a one-way inflation valve outside the gathering and transportation pipeline, filling a corrosion inhibitor into a corrosion inhibitor liquid storage cylinder, connecting a liquid outlet of the corrosion inhibitor liquid storage cylinder with a liquid inlet of the sprayer through a metal hose, rotating a rotary sleeve of a rotary mechanism to enable a rolling wheel to form a certain included angle with the axis of the pipeline, positioning through a positioning bolt, connecting a pipe cleaner, the corrosion inhibitor liquid storage cylinder and the sprayer through a coupler, placing the connected corrosion inhibitor spraying and coating device into the pipeline, and opening an air outlet valve of the sprayer;
b. the remote control switch box is controlled by a remote controller from the outside, so that the air bag mechanism works to burst the air bag, the movable plate is pushed to move, and the corrosion inhibitor liquid is provided with certain pressure to enter a liquid inlet pipe of the sprayer from a liquid outlet and fill the whole fan-shaped nozzle;
c. high-pressure gas of a high-pressure gas storage bottle in the sprayer enters the gas inlet pipe through the gas outlet valve, the high-pressure gas is decompressed by the dynamic pressure reducing valve and then is sprayed out through the Venturi reducer, vacuum is formed at the outlet of the Venturi reducer, so that the formed high-speed gas is swabbed and carries the corrosion inhibitor, and spray mist is formed through the fan-shaped nozzle and sprayed on the inner wall of the pipeline to form a corrosion inhibitor protective film;
d. the pipe cleaner is pushed by the air pressure at the back, the coupling provides tension for the corrosion inhibitor liquid storage cylinder and the sprayer, so that the whole device runs in the pipeline, the rotating mechanism decomposes a circumferential rotating speed from the axial speed to rotate the sprayer and the corrosion inhibitor liquid storage cylinder, and the corrosion inhibitor is sprayed more uniformly to finally finish the spray coating operation of the corrosion inhibitor in the gathering and transportation pipeline.
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