Modular adaptive in-pipe wall rust removal device and method of use thereof

Abstract

A kind of modular adaptive pipeline inner wall rust removal device and its using method, polishing rust removal assembly with dust collector and spraying rust removal assembly are connected by universal joint, the rust removal motor of polishing rust removal assembly head is started, so that steel brush and guide wheel rotate to complete the removal of floating rust on the inner wall of pipe and the guidance of device, the action drive motor outside the assembly is started, so that drive motor drives driving wheel to rotate, and then drives the movement of device, spraying rust removal agent is sprayed on the inner wall of pipe to remove stubborn rust, and passivation protective film is formed, V-shaped baffle is arranged on polishing rust removal assembly and chemical spraying assembly, through hole is arranged between the head of assembly and V-shaped baffle, and dust collector pipeline is arranged at tail, through the negative pressure provided by dust collector and the cooperation of V-shaped baffle, the mixture of polishing rust and spraying rust removal agent residue and rust slag is discharged. It improves the efficiency of rust removal by combining polishing rust removal and chemical spraying rust removal.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipeline inner wall rust removal, and particularly relates to a modular self-adaptive pipeline inner wall rust removal device and a use method. BACKGROUND

[0002] Large tubular steel structures serving outdoors are easy to be oxidized and corroded to form a rust layer on the inner surface in long-term contact with the transportation medium. The rust layer is usually loose and hygroscopic, which can accelerate the corrosion rate of the steel structure surface and seriously affect the service life of the steel structure.

[0003] The existing methods for removing rust from the surface of the steel structure include sand blasting, mechanical polishing, laser rust removal, and chemical rust removal, but all have advantages and disadvantages. For example, sand blasting has good rust removal effect, but is noisy, has high labor cost, and the sprayed powder is easy to pollute the environment; mechanical polishing has low cost, but has poor rust removal consistency and low efficiency; laser rust removal has high rust removal efficiency, but has high equipment cost. One of the commonly used chemical rust removal methods is to use inorganic acid to perform pickling on the rusted area, which has low cost and good rust removal effect, but causes serious environmental pollution and hydrogen embrittlement in the rusted area, which reduces the mechanical properties of the steel structure.

[0004] According to the investigation, the Chinese patent with the patent publication number CN115350853A, "Rust removal and spraying device in coastal buried pipeline", fixes the connecting disc two outside the hollow guide rod through the fixing mechanism and the one end of the pipeline, starts the motor fixedly connected outside the connecting disc two through the connecting plate, makes the gear at the motor driving output end rotate, the gear will drive the rack engaged with the outside to move when rotating, the rack is fixed outside the hollow guide rod, thereby the gear drives the hollow guide rod to automatically slide inside the connecting disc two, and the stability of the hollow guide rod sliding is improved under the action of the limiting strip, thereby the hollow guide rod pushes the hollow screw rod and the connecting disc one to move to the inside of the pipeline, the other side of the connecting disc one is provided with a rotary spray head and a steel wire brush head, the rotary spray head and the steel wire brush head can reach the effect of uniform speed by controlling the rotating speed of the motor, the spraying thickness is uniform, thereby the precision of rust removal and spraying is improved, and the efficiency of rust removal and corrosion prevention of the internal curved surface of the pipeline is improved. The patent number CN202211389833.2, "Pipeline rust removal device capable of automatically adjusting rust removal radius according to pipe diameter", discloses a pipeline rust removal device capable of automatically adjusting rust removal radius according to pipe diameter, and relates to the technical field of pipeline polishing and polishing equipment, comprising a main body, a first cavity, a bidirectional motor, a movable block, a first gear, a second gear, a first rotating shaft, a track, a guide rod, a sliding block, a steel brush, a fixed rod, a compression spring, a limiting rod, a through groove, a second cavity, a first bevel gear, a first sleeve, a second bevel gear, a third connecting rod, a limiting block and a limiting groove. The present application can ensure the contact between the steel brush and the inner wall of the pipeline by setting the centrifugal force, the guide rod and the compression spring, and can automatically adjust the rust removal radius according to the pipe diameter, thereby ensuring the use effect of the device. The fourth cavity is driven by the second connecting rod to move towards the inside. The Chinese patent with the patent number CN202011435256.7, "High-efficiency environment-friendly rust removal agent and preparation method and application thereof", discloses a chemical rust removal method, and the rust removal agent is composed of hydroxyethylidene diphosphonic acid HEDP, p-toluenesulfonic acid, citric acid, phosphoric acid, water, Schiff base, corrosion inhibitor and additive, and the specific percentage content is 10.1-16.2% of organic acid, 5-9% of phosphoric acid, 0.5-1% of Schiff base, 0.1-0.5% of corrosion inhibitor, 1-5% of additive, and the rest is water to make up 100%. The rust removal agent can quickly remove the floating rust, heavy rust and different degrees of oxide scale on the surface of steel, can reduce the hydrogen brittleness of the substrate surface, but lacks protection for the surface after rust removal, and is easy to produce secondary rust after rust removal.

[0005] The above rust removal method still has great limitations for non-linear pipeline inner wall rust removal and rust slag discharge, and the device structure is complex. Therefore, a modular self-adaptive pipeline inner wall rust removal device needs to be developed. SUMMARY

[0006] The primary object of the present application is to provide a modular adaptive pipeline internal rust removal device to solve the problems of existing pipeline internal rust removal, rust slag discharge and greater difficulty in work.

[0007] Another object of the present application is to provide a method for using the above-mentioned modular adaptive pipeline internal rust removal device.

[0008] To achieve the above primary object, the present application provides the following technical solution: a modular adaptive pipeline internal rust removal device, comprising a polishing and rust removal assembly and a chemical spraying assembly, characterized in that: the polishing and rust removal assembly and the chemical spraying assembly are hollow shell structures, the polishing and rust removal assembly and the chemical spraying assembly are connected through a universal joint, a first through hole is provided at the front end of the assembly body, a V-shaped baffle is provided at the rear end of the first through hole, a second through hole is provided in the middle of the V-shaped baffle, the first through hole and the second through hole are connected with a dust collector, a driving system is provided at the rear segment of the assembly body, a rust removal motor is provided at the head of the polishing and rust removal assembly, a polishing system and a guide system are provided at the end of the rotating shaft of the rust removal motor, and a rust removal agent spray head is provided at the head of the chemical spraying assembly.

[0009] Further, the V-shaped baffle is composed of two reverse combined tapered rubber baffles, the outer diameter of the baffle is the same as the inner diameter of the pipeline to be processed, and the rubber tapered baffle is detachably designed and fixed on the assembly body by bolts.

[0010] Further, the driving system is composed of three annularly arranged driving modules, the included angle between the driving modules is 120°, the first base and the second base are provided on the driving module, the first base and the second base are connected by springs to provide adhesion for the driving wheels, the first base is connected with the assembly body by bolts, a driving motor is provided above the second base, a speed reducer is connected with the rotating shaft of the driving motor, and the speed reducer is connected with the driving wheels attached to the wall.

[0011] Further, the polishing system is composed of three annularly arranged steel brushes, the included angle between the steel brushes is 120°, the steel brushes are connected with the rotating shaft of the rust removal motor through telescopic supports, the telescopic supports include upper and lower sleeves, springs are arranged inside the upper and lower sleeves, a plurality of rectangular adjustment through holes are arranged on the wall of the upper sleeve, and positioning bolts are arranged on the outer edge of the lower sleeve to cooperate with the adjustment through holes.

[0012] Further, the guide system is composed of a guide rod and a pulley, the guide rod is connected with the rotating shaft of the rust removal motor, and the pulley is fixed at the top end of the guide rod.

[0013] Further, the rust removal agent spray head comprises three annularly distributed conduit supports and nozzles, the conduit supports are connected with the rust removal agent conduit, the nozzles are conical, and the included angle between the spray heads is 120 degrees.

[0014] Finally, the hollow shell structure presents a capsule structure.

[0015] To achieve the above-mentioned another object, the application provides a use method of the modular adaptive pipeline inner wall rust removal device, characterized by: combining the polishing rust removal and the chemical spraying rust removal, the rust removal module of the polishing rust removal removes the blocky and large-particle rust on the pipeline inner wall through a steel brush, the peeled rust is discharged through the negative pressure of a dust collector and a conduit, the chemical spraying rust removal removes the stubborn rust stains through rust removal agent spraying, and a passivation film is formed on the pipeline inner wall, and the rust removal agent is discharged from the pipeline through the micro-negative pressure of the dust collector after reacting with the pipeline inner wall.

[0016] Compared with the prior art, the application has the following advantages:

[0017] 1. The application combines the physical rust removal and the spraying rust removal through the setting of the rotating steel brush and the rust removal agent spraying, thereby improving the rust removal efficiency.

[0018] 2. The application improves the adaptability of the device to the non-linear pipeline through the simple and effective method of setting the spring at the tail end of the rust removal motor and the pulley at the end of the rotating shaft.

[0019] 3. The application forms a group of V-shaped baffles through the reverse combination of the two rubber conical baffles, the front baffle on the outer side of the bend and the rear baffle on the inner side of the bend are separated from the pipeline inner wall when the guiding system drives the physical / spraying rust removal component to turn, but the part of the obliquely opposite baffles can still be in close contact with the pipeline inner wall, so that the V-shaped baffles are isolated.

[0020] 4、The driving system and the rust removal system of the present application are separated, and can work synchronously / asynchronously without affecting each other, and the advancing speed and the rust removal speed can be adjusted according to the rust condition inside the pipeline.

[0021] 5、The steel brush support, the V-shaped baffle and the driving system of the present application are all designed to be detachable, and the length of the steel brush support, the height of the V-shaped baffle and the distance between the first and second bases of the driving system can be selected / adjusted according to the inner diameter of the working pipeline, so as to adapt to pipelines with different inner diameters, and the device has strong adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a modular adaptive pipeline inner wall rust removal device provided by the present application.

[0023] Figure 2 is a detachable V-shaped baffle structure provided by the present application.

[0024] Figure 3 is an adjustable length steel brush support structure provided by the present application.

[0025] Figure 4 is a driving module structure provided by the present application. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0027] Example 1, refer to Figures 1-4 The present application refers to a modular adaptive pipeline inner wall rust removal device, which comprises a polishing and rust removal assembly 1 and a spraying and rust removal assembly 2, and the polishing and rust removal assembly 1 and the spraying and rust removal assembly 2 are connected through a universal joint 3.

[0028] The first through hole 4 is arranged at the front end of the polishing and rust removal assembly 1 body, the V-shaped baffle 5 is arranged at the rear end of the first through hole 4, the second through hole 6 is arranged in the middle of the V-shaped baffle 5, the V-shaped baffle 5 is fixed with the polishing and rust removal assembly 1 body through the bottom bolt 7, the driving module 8 is arranged at the rear end of the V-shaped baffle 5, the first base 9 and the second base 10 are arranged in the driving module 8, the first base 9 and the second base 10 are connected through the spring group 11, the first base 9 is connected with the polishing and rust removal assembly 1 through the bolt 12, the driving motor 13 is arranged on the second base 10, the driving motor 13 rotating shaft is connected with the reduction box 14, the reduction box 14 is connected with the driving wheel 15, the reduction box 14 is internally provided with a three-stage gear set, the first-stage gear 16 is connected with the driving motor 13 rotating shaft, the second-stage gear 17 is connected with the first-stage gear 16, the third-stage gear 18 shaft center is perpendicular to the first-stage gear 16, the third-stage gear 18 is connected with the second-stage gear 17, the third-stage gear 18 is coaxially connected with the driving wheel 15, the three-stage gears are all inclined 45° gears, the dust collector pipeline 19 is arranged at the rear end of the driving system 8, the pipeline 19 is connected with the first through hole 4 and the second through hole 6, the first through hole 4 front end is provided with a guide polishing system 20, the guide polishing system 20 is connected with the body of the polishing and rust removal assembly 1 by the spring group 21, the guide polishing system 20 is composed of a driving motor 22, a steel brush support 23, a steel brush 24, a guide support 25 and a guide wheel 26, the driving motor 22 rotating shaft is connected with the steel brush support 23, the steel brush support 23 is connected with the steel brush 24, the steel brush support 23 is arranged in a circular ring, the guide support 25 tail end is connected with the driving motor 22 rotating shaft, the guide support 25 head end is connected with the guide wheel 26, the steel brush support 23 is composed of an upper sleeve 27 and a lower sleeve 28, the spring 29 is arranged in the middle of the upper sleeve 27 and the lower sleeve 28, a plurality of rectangular adjusting through holes 30 are arranged on the sleeve wall of the upper sleeve 27, the lower sleeve 28 is provided with a positioning bolt 31 at the corresponding position to cooperate with the adjusting through hole 30;

[0029] The first through hole 32 is arranged at the front end of the spraying and rust removal assembly 2, the V-shaped baffle 33 is arranged at the rear end of the first through hole 32, the second through hole 34 is arranged in the middle of the V-shaped baffle 33, the V-shaped baffle 33 is fixed with the spraying and rust removal assembly body 2 through the bottom bolt 35, the driving module 8 is arranged at the rear end of the V-shaped baffle 33, the dust collector pipeline 36 and the rust removal agent pipeline 37 are arranged at the rear end of the driving module 8, the dust collector pipeline 36 is connected with the first through hole 32 and the second through hole 34, the first through hole 32 front end is provided with a spraying system 38, the spraying system 38 is composed of a guide pipe support 39 and a spray head 40, the hollow guide pipe support 39 is connected with the rust removal agent guide pipe 37, the pull ring 41 is arranged at the tail of the spraying and rust removal assembly body, the pull ring 41 is connected with the safety rope 42.

[0030] In the application, the physical polishing rust removal assembly 1 is in front, and the chemical spraying rust removal assembly 2 is in back. In the rust removal process, firstly, the floating rust on the inner wall of the pipeline is removed by the polishing rust removal method, and then the stubborn rust stains are removed by the chemical reaction between the rust removal agent and the inner wall of the pipeline, and a protective layer is formed. The combination of physical rust removal and chemical rust removal improves the rust removal efficiency.

[0031] In the application, the spring group 21 is arranged between the polishing rust removal assembly 1 and the polishing guide system 20. The polishing guide system 20 is provided with a guide wheel 26 at the front end. When the driving motor 22 works, the guide wheel 26 rotates with the rotating shaft of the motor 22. At the position of the pipeline bend, the guide wheel 26 first contacts the outer side of the bend. Under the action of the reverse thrust, the guide wheel 26, the guide bracket 23 and the motor 22 are pushed to the inner side of the bend. At this time, the inner side spring of the spring group 21 is in a compressed state, and the outer side spring is in a stretched state. When the polishing rust removal assembly main body 1 passes through the bend, the guide wheel 26 is separated from the inner wall of the pipeline, the reaction force disappears, the stress state of the guide system 20 changes, the original inner side spring of the bend provides tension for the guide system 20, and the original outer side spring of the bend provides tension for the guide system 20. The guide system 20, i.e. the guide bracket 25, is in a state of being parallel to the inner wall of the pipeline, thereby achieving the effect of automatic bending.

[0032] In the application, the length of the steel brush bracket 23 can be adjusted through the adjusting through hole 30 on the upper sleeve 27 and the positioning bolt 31 on the lower sleeve 28. The width of the adjusting through hole 30 is greater than that of the positioning bolt 31, so that the bracket 23 can move in a certain range and provide support force through the spring 29 in the bracket, so that the steel brush 24 at the end of the bracket 23 is closely connected with the inner wall of the pipeline, so as to adapt to pipelines with different diameters.

[0033] In the application, the two rubber tapered baffles form a V-shaped baffle 5 / V-shaped baffle 33. When the polishing guide system 20 turns, the front baffle on the outer side of the bend and the rear baffle on the inner side of the bend are separated from the inner wall of the pipeline, but the corresponding obliquely opposite baffles can still be in close contact with the inner wall of the pipeline, so that the V-shaped baffles are isolated in front and back. During rust removal, only negative pressure is formed on one side of the rust removal side, so as to increase the efficiency of rust slag / rust removal agent discharge.

[0034] In the application, the height of the steel brush bracket 23 and the height of the V-shaped baffle in the polishing system 20 and the height of the spring group 11 in the driving system 8 can be adjusted according to the inner diameter of the working pipeline. The driving module 8 is designed to be separated from the rust removal system, and can work synchronously / asynchronously without affecting each other. The feeding speed and the rust removal speed can be adjusted according to the internal decoration of the pipeline, thereby improving the adaptability of the device.

[0035] The working principle and use process of the application are as follows:

[0036] In use, the polishing and rust removal assembly 1 and the spray and rust removal assembly 2 are connected, the polishing and rust removal assembly 1 is provided with four first through holes 4 at the front end of the main body, the first through holes 4 are arranged in a ring shape at the outer edge of the polishing and rust removal assembly 1, and the included angle between each through hole is 90°, a V-shaped baffle 5 is selected according to the inner diameter of the working pipeline, the V-shaped baffle 5 is installed at the rear end of the first through hole 4, the V-shaped baffle 5 is provided with four second through holes 6 in the middle, the second through holes 6 are arranged in a ring shape at the outer edge of the polishing and rust removal assembly 1, and the included angle between each through hole is 90°, the V-shaped baffle 5 is fixed with the main body of the polishing and rust removal assembly 1, three drive modules 8 are arranged at the rear end of the V-shaped baffle 5, the drive modules 8 are arranged in a ring shape at the outer edge of the polishing and rust removal assembly 1, and the included angle between each module is 120°, a spring set 11 is selected according to the inner diameter of the pipeline, the first base 9 and the second base 10 of the drive system 8 are connected through the spring set 11, the first base 9 is connected with the polishing and rust removal assembly 1, a drive motor 13 is fixed on the second base 10, the rotating shaft of the drive motor 13 is connected with a speed reducer 14, the speed reducer 14 is connected with a drive wheel 15, a first-stage inclined 45° gear 16 in the speed reducer 14 is connected with the rotating shaft of the drive motor 13, a second-stage inclined 45° gear 17 is connected with the first-stage inclined 45° gear 16, a third-stage inclined 45° gear 18 is perpendicular to the first-stage inclined 45° gear 16 in the axis, the third-stage inclined 45° gear 18 is connected with the second-stage inclined 45° gear 17, and the third-stage inclined 45° gear 18 is connected with the drive wheel 15, a dust collector pipeline 19 is connected with the first through hole 4 and the second through hole 6, a guide polishing system 20 is connected with the main body of the polishing and rust removal assembly 1 through a spring set 21, the rotating shaft of a drive motor 22 of the guide polishing system 20 is connected with three steel brush supports 23, the included angle between each support is 120°, the length of the support 23 is adjusted according to the inner diameter of the pipeline, the steel brush support 23 is fixed through adjusting through holes 30 on the upper and lower sleeves and positioning bolts 31, the steel brush support 23 is connected with a steel brush 24, the tail end of a guide support 25 is connected with the rotating shaft of the drive motor 22, and the head end of the guide support 25 is connected with a guide wheel 26, the spray and rust removal assembly 2 is provided with four first through holes 32, the first through holes 32 are arranged in a ring shape at the outer edge of the spray and rust removal assembly 2, the included angle between each through hole is 90°, a V-shaped baffle 33 is arranged at the rear end of the first through hole 32, the V-shaped baffle 33 is fixed with the main body of the chemical spraying assembly 2 through bottom bolts 35, second through holes 34 are arranged between the V-shaped baffles 33, the first through holes 34 are arranged in a ring shape at the outer edge of the spray and rust removal assembly 2, the included angle between each through hole is 90°, a pipeline 36 is connected with the first through hole 32 and the second through hole 34, a hollow pipeline support 39 is connected with a rust removal agent pipeline 37, a pull ring 41 is connected with a safety rope 42.

[0037] In operation, the driving motor 22 on the polishing and guiding system 20 and the spraying system 38 are turned on, the polishing and rust removal and the chemical reaction rust removal start to work; the driving motor 13 on the driving module 8 is turned on, the device starts to feed; the dust collector connected with the pipeline 19 and the pipeline 36 is turned on, the rust residue and the waste liquid of the rust removal agent and the mixture of the rust residue start to be discharged.

[0038] The above description is only some preferred embodiments of the present application, any skilled person in the art can modify the above-mentioned technical solutions or modify them into equivalent technical solutions. Therefore, the corresponding simple modifications or equivalent transformations according to the technical solutions of the present application are within the scope of protection claimed by the present application.

Claims

1. A modular, self-adapting in-pipe wall rust removal device comprising an abrasive rust removal assembly and a chemical spray assembly, characterized by: The polishing and rust removal assembly and the chemical spraying assembly body are hollow shell structures, the polishing and rust removal assembly and the chemical spraying assembly are connected through a universal joint, the polishing and rust removal assembly and the chemical spraying assembly body are provided with a first through hole at the front end, the first through hole is provided with a V-shaped baffle at the rear end, the V-shaped baffle is provided with a second through hole in the middle, the first through hole and the second through hole are connected with a dust collector, the polishing and rust removal assembly and the chemical spraying assembly body are provided with a driving system at the rear section, the polishing and rust removal assembly is provided with a rust removal motor at the head, the rust removal motor rotating shaft is provided with a polishing system and a guide system at the end, and the chemical spraying assembly is provided with a rust removal agent nozzle at the head. The V-shaped baffle is composed of two reverse conical rubber baffles, the outer diameter of the baffle is the same as the inner diameter of the pipeline to be processed, and the conical rubber baffles are detachable and fixed on the polishing and rust removal assembly and the chemical spraying assembly body through bolts. The driving system is composed of three annular driving modules, the included angle between the driving modules is 120°, the driving modules are provided with first and second bases, the first and second bases are connected through springs to provide adhesion for the driving wheels, the first base is connected with the assembly body through bolts, a driving motor is arranged above the second base, a speed reducer is connected with the driving motor rotating shaft, and the speed reducer is connected with the driving wheels on the wall.

2. A modular, self-adapting in-pipe wall rust removal device according to claim 1, characterized in that: The polishing system is composed of three annular steel brushes, the included angle between the steel brushes is 120°, the steel brushes are connected with the rust removal motor rotating shaft through telescopic supports, the telescopic supports include upper and lower sleeves, springs are arranged in the upper and lower sleeves, a plurality of rectangular adjusting through holes are arranged on the wall of the upper sleeve, and positioning bolts are arranged on the outer edge of the lower sleeve and matched with the adjusting through holes.

3. The modular, self-adapting in-pipe wall rust removal device of claim 1, wherein: The guide system is composed of a guide rod and a pulley, the guide rod is connected with the rust removal motor rotating shaft, and the pulley is fixed at the top end of the guide rod.

4. The modular, self-adapting in-pipe wall rust removal device of claim 1, wherein: The rust removal agent nozzle includes three annularly distributed pipe supports and nozzles, the pipe supports are connected with rust removal agent pipes, the nozzles are conical, and the included angle between the nozzles is 120°.

5. The modular, self-adapting in-pipe wall rust removal device of claim 1, wherein: The hollow shell structure presents a capsule structure.

6. A method of using the modular self-adapting in-pipe wall rust removal device according to any one of claims 1-5, characterized in that: The polishing and rust removal and chemical spraying rust removal are combined, the rust removal module of the polishing and rust removal removes the block-shaped and large particle size floating rust on the inner wall of the pipeline through the steel brush, the peeled floating rust is discharged through the guide pipe under the negative pressure generated by the dust collector, the chemical spraying rust removal removes stubborn rust stains through rust removal agent spraying, and forms a passivation film on the inner wall of the pipeline, and the rust removal agent reacts with the inner wall of the pipeline and is discharged from the pipeline under the micro-negative pressure generated by the dust collector.

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