A device and method for rust removal from an elongate pipe

Abstract

The application provides an elongated pipeline rust removal device and a rust removal method. The rust removal device comprises a rust removal connecting pipe. One end of the rust removal connecting pipe is connected with a pipe opening of a pipeline to be rust removed. The other end of the rust removal connecting pipe is provided with a sealing mechanism. The sealing mechanism comprises a pressing seat. An outer thread matched with the inner wall of the rust removal connecting pipe is arranged outside the pressing seat. A bearing platform is arranged in the rust removal connecting pipe. A sealing filler is arranged between the pressing seat and the bearing platform. A through hole for a pipe penetrating rope is arranged on the pressing seat. A brush is arranged outside the pipe penetrating rope. A water filling and discharging pipe is arranged outside the rust removal connecting pipe. The device and the method can adopt various rust removal modes to perform rust removal operation on the inner wall of the elongated pipeline, and improve the rust removal effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipeline rust removal, in particular to an elongated pipeline rust removal device and method. BACKGROUND

[0002] There are many methods for metal rust removal, common ones include manual tool rust removal method, electric tool rust removal method, sand blasting rust removal method, chemical rust removal method, and rust removal agent rust removal method. The manual tool rust removal method mainly uses a shovel, a steel wire brush, and coarse sandpaper to manually remove rust. This method is tedious, has high labor costs, and may not remove rust completely, resulting in low quality and efficiency. The electric tool rust removal method mainly uses an electric brush wheel or a rust removal machine to remove rust, which requires the use of machinery and causes significant wear to the surface of the metal base. The sand blasting rust removal method mainly uses compressed gas to drive abrasive particles (sand) to generate high-speed kinetic energy, which is generally used for removing rust from rails, large pipeline inner and outer walls, and large metal components. However, this method cannot be used for treating metal with a large depth and small diameter because it requires a pipeline for transporting gas and sand particles. The chemical rust removal method uses strong inorganic acids such as hydrochloric acid to remove rust from metal surfaces through methods such as spraying, soaking, and brushing. However, strong acids are highly corrosive and polluting, and have a significant impact on the environment. The rust removal agent rust removal method uses a rust removal agent composed of weakly acidic chemical liquids. The agent can be sprayed or soaked onto the rusted metal. However, the rust removal efficiency of weakly acidic agents is lower than that of strong acids, and a certain amount of soaking time is required to achieve rust removal.

[0003] CN112338663A discloses an elongated steel pipe inner wall rust removal device that mainly uses a mechanical rotating component with implanted brushes and added sand particles to remove rust. This device can solve the problem of rust removal on the inner wall of a straight pipe, but it is difficult to remove rust from pipes with multiple bends and excessive length.

[0004] CN103611712B discloses a small-diameter pipeline inner wall rust removal and cleaning method and device that mainly uses a double-strand steel wire rope with an equal-diameter flexible material device. The equal-diameter flexible material is pushed forward along the steel wire rope by air pressure. In essence, the equal-diameter flexible material is pushed forward by the power generated by the air pressure difference, and the cleaning is achieved by the rotation of the double-strand spiral steel wire. Therefore, this method has high requirements for the inner wall of the pipeline and is prone to pressure relief, which affects the forward progress of the cleaning component. The cleaning component mainly relies on the friction of the equal-diameter flexible material, and it is mainly used to handle the blockage of pipelines with weak adhesion, such as hydraulic oil pipelines. According to its principle, it cannot remove solid particles, cement stones, rust stains, and other blockages, and it cannot clean pipelines with right-angle bends because it will cause a significant pressure drop due to the change in diameter.

[0005] Most existing water structures have a large number of pipelines of various purposes buried in them. As the pipelines gradually reach their service life, they will eventually be abandoned.

[0006] After abandonment, in order to prevent water from leaking from the dam, cement grouting or orifice plugging is generally used for pipe plugging.

[0007] Whether one end is plugged, both ends are plugged, or the pipe is fully plugged, if the inner wall of the pipeline is full of rust, on the one hand, it affects the smoothness of the grouting process, and on the other hand, even if the pipe is fully plugged, due to the blockage of rust, a small amount of water can still penetrate the contact surface of the pipe wall, thereby continuing to rust and accelerating the cracking of the concrete, affecting the service life of the building. Once the port plugging material falls off, internal water leakage will occur again. Therefore, in order to ensure safety, rust removal needs to be performed before pipe plugging. For small pipes, soaking with a rust remover is a good choice, but how to ensure that the rust remover stays in the pipe and can perform deep rust removal requires physical and chemical methods to assist each other to achieve good results. However, there is currently no solution, especially for long and thin pipes under pressure. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a long and thin pipeline rust removal device and method, which can use multiple rust removal methods to remove rust from the inner wall of the long and thin pipeline, thereby improving the rust removal effect.

[0009] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a long and thin pipeline rust removal device, comprising a rust removal connecting pipe, one end of the rust removal connecting pipe being connected to the pipe opening of a pipeline to be rust removed, the other end of the rust removal connecting pipe being provided with a sealing mechanism, the sealing mechanism comprising a pressing seat, an outer thread being provided on the outer side of the pressing seat and cooperating with the inner wall of the rust removal connecting pipe, a bearing platform being provided in the rust removal connecting pipe, a sealing filler being provided between the pressing seat and the bearing platform, a through hole being provided in the pressing seat for a pipe penetrating rope to pass through, a brush being provided on the outer side of the pipe penetrating rope, and a water filling and discharging pipe being provided on the outer side of the rust removal connecting pipe.

[0010] In a preferred scheme, an air filling pipe is provided on the outer side of the rust removal connecting pipe.

[0011] In a preferred scheme, a one-way valve is provided on the water filling and discharging pipe and the air filling pipe.

[0012] In a preferred scheme, a traction head is provided at the end of the pipe penetrating rope.

[0013] In a preferred scheme, the material of the traction head is sponge.

[0014] The present application also discloses a long and thin pipeline rust removal method, comprising the following steps:

[0015] Step 1: installing a rust removal connecting pipe on the pipe opening of a pipeline to be rust removed;

[0016] Step two, the tube rope is put on, the tube rope is put into the through hole of the pressure seat, the pressure seat is pre-pressed and installed at the end of the rust removal connecting pipe, the inflation pipe is filled with compressed gas, the gas is pressed on the traction head, the traction head pulls the tube rope, and the tube rope is pulled into the pipe to be rusted;

[0017] Step three, spin sealing, tighten the pressure seat, and extrude the sealing filler, the sealing filler tightly seals the tube rope;

[0018] Step four, rust remover soaking, the rust remover is transported from the water filling and discharging pipe to the pipe to be rusted by the delivery pump, and full pipe soaking or intermittent pipe lubrication is adopted;

[0019] Step five, pull the tube rope, and the brush outside the tube rope cleans the pipe to be rusted.

[0020] In the preferred scheme, in step five, after the rust spot is soft, the compressed gas enters the pipe to be rusted from the inflation pipe to flush the inner wall, and air washing or air-water synchronous washing is performed.

[0021] The present application provides an elongated pipeline rust removal device and a rust removal method, which has the following beneficial effects:

[0022] 1. Several conventional measures are combined on a single device, frequent replacement of the pipe opening device is not required according to different rust removal methods, the rust removal effect and efficiency are greatly improved.

[0023] 2. Physical rust removal operations such as air washing, water flushing, air-water synchronous cleaning and rope brush friction cleaning can be performed under pressure, and chemical rust removal operations such as strong acid soaking and rust removal agent rust removal can also be performed, which avoids the leakage of a large amount of water under pressure during the process and affects the operation surface.

[0024] 3. The problem of rust removal at the distal end of the elongated pipeline is solved, and reliable anti-seepage protection is provided for the backfilling of the subsequent pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in conjunction with the drawings and embodiments:

[0026] Fig. 1 It is a schematic diagram of the overall structure of the present application;

[0027] Fig. 2 It is a schematic diagram of the structure of the tube rope;

[0028] In the figure: rust removal connecting pipe 1, pipe to be rusted 2, pressure seat 3, sealing filler 4, tube rope 5, brush 6, water filling and discharging pipe 7, inflation pipe 8, one-way valve 9, traction head 10, bearing platform 101. DETAILED DESCRIPTION

[0029] For example, Figs. 1-2As shown, a kind of super-long pipeline derusting device, including derusting connecting pipe 1, one end of derusting connecting pipe 1 is connected with the pipe orifice of to-be-derusted pipeline 2, derusting connecting pipe 1 is connected with the pipe orifice of to-be-derusted pipeline 2 by flange connection or screw connection, the other end of derusting connecting pipe 1 is equipped with sealing mechanism, sealing mechanism includes pressure seat 3, pressure seat 3 is "T" shaped structure, the outer side of pressure seat 3 is equipped with outer thread matched with the inner wall of derusting connecting pipe 1, derusting connecting pipe 1 is equipped with bearing platform 101, sealing filler 4 is arranged between pressure seat 3 and bearing platform 101, sealing filler 4 is of elastic material, and sealing filler 4 can be specifically selected from materials such as silicone, fluorine glue, EPDM or chlorobutyl rubber.

[0030] The through hole for the pipe penetrating rope 5 to pass through is arranged on the pressure seat 3, the outer side of the pipe penetrating rope 5 is equipped with the brush 6, the pipe penetrating rope 5 passes through the through hole of the pressure seat 3 and moves back and forth, the brush 6 is distributed on the outer side of the pipe penetrating rope 5 and is in the form of thorn, the pipe penetrating rope 5 can be all or partially distributed with the brush 6, and the pipe penetrating rope 5 is a semi-hard or soft rope. The movement of the pipe penetrating rope 5 is realized by adjusting the tightening degree of the pressure seat 3, adjusting the deformation degree of the sealing filler 4 and adjusting the pressure on the pipe penetrating rope 5.

[0031] The outer side of the derusting connecting pipe 1 is equipped with water filling and discharging pipe 7. Through the water filling and discharging pipe 7, it is convenient to inject derusting agent or chemical derusting liquid into the to-be-derusted pipeline 2.

[0032] Preferably, the outer side of the derusting connecting pipe 1 is equipped with air filling pipe 8. Compressed air is injected through the air filling pipe 8, so that air flushing or air-water combined flushing can be realized.

[0033] In specific use, the water filling and discharging pipe 7 and the air filling pipe 8 are both equipped with one-way valve 9, so that one-way liquid supply or air supply is realized.

[0034] Preferably, the end of the pipe penetrating rope 5 is equipped with traction head 10. The traction head 10 is made of sponge and can be in the form of ball or column.

[0035] Through the setting of the traction head 10, the traction head 10 is pressed when the air filling pipe 8 fills air into the derusting connecting pipe 1, so that the pipe penetrating rope 5 is conveniently pulled.

[0036] A derusting method of elongated pipeline, comprising the following steps:

[0037] Step one, install the derusting connecting pipe 1 on the pipe orifice of to-be-derusted pipeline 2.

[0038] If there is pressure water in the to-be-derusted pipeline 2, a ball valve should be installed in advance to temporarily close the to-be-derusted pipeline 2.

[0039] Step two, the installation of the tube rope 5, the tube rope 5 is put into the through hole of the pressure seat 3, the pressure seat 3 is pre-pressed and installed at the end of the rust removal connecting pipe 1, the pressure seat 3 is in a semi-loose state, the inflation pipe 8 is filled with compressed gas, the gas presses the traction head 10, the traction head 10 pulls the tube rope 5, forming an auxiliary traction of the tube rope 5, and the tube rope 5 is pulled into the to-be-cleaned pipe 2.

[0040] Step three, spinning sealing, tightening the pressure seat 3, and extruding the sealing filler 4, the sealing filler 4 tightly seals the tube rope 5.

[0041] Step four, rust removal agent soaking, the rust removal agent is delivered from the water filling and discharging pipe 7 to the to-be-cleaned pipe 2 through the delivery pump, and full pipe soaking or intermittent pipe lubrication is adopted. For the pipe with full pipe soaking of the rust removal agent, the pipe is soaked according to the rust removal agent usage instruction, and for the pipe without full pipe soaking condition, the intermittent pipe lubrication is adopted to replace the complete soaking.

[0042] Step five, pulling the tube rope 5, the brush 6 outside the tube rope 5 cleans the to-be-cleaned pipe 2.

[0043] With the extension of the rust soaking time, the rust will be gradually softened, at this time, the tube rope is pulled, the brush 6 on the rope brushes the inner wall, accelerates the falling of the rust, and further facilitates the further penetration of the rust removal agent into the deep rust.

[0044] After the rust spot is soft, the compressed gas enters the to-be-cleaned pipe 2 from the inflation pipe 8 to flush the inner wall, and the inflation washing or air-water synchronous washing is performed.

[0045] After the rust spot is soft, the compressed gas enters the pipe to flush the inner wall, and the operation is repeated for several times to achieve the purpose of long-distance rust removal.

[0046] The physical rust removal operation can be carried out under pressure, such as inflation washing, water washing, air-water synchronous cleaning, and rope brush rubbing physical cleaning, and the chemical rust removal operation can also be carried out, such as strong acid soaking rust removal and rust removal agent rust removal, which avoids the leakage of a large amount of water under pressure in the process and affects the operation surface.

Claims

1. A rust removal device for slender pipes, characterized in that, The system includes a rust-removing connecting pipe (1), one end of which is connected to the pipe opening of the pipe to be rusted (2), and the other end is provided with a sealing mechanism. The sealing mechanism includes a pressure seat (3), the outer side of which is provided with an external thread that mates with the inner wall of the rust-removing connecting pipe (1). The rust-removing connecting pipe (1) is provided with a support (101), and a sealing filler (4) is provided between the pressure seat (3) and the support (101). The pressure seat (3) is provided with a through hole for the pipe rope (5) to pass through. The outer side of the pipe rope (5) is provided with a brush (6), the outer side of the rust-removing connecting pipe (1) is provided with a water filling and draining pipe (7), the outer side of the rust-removing connecting pipe (1) is provided with an air filling pipe (8), and both the water filling and draining pipe (7) and the air filling pipe (8) are provided with a one-way valve (9). The end of the pipe rope (5) is provided with a traction head (10).

2. The rust removal device for slender pipes according to claim 1, characterized in that, The traction head (10) is made of sponge.

3. A method for removing rust from slender pipes, characterized in that, Rust removal using the slender pipe rust removal device according to claim 1 includes the following steps: Step 1: Install the rust-removing connecting pipe (1) into the pipe opening of the pipeline (2) to be rust-removed; Step 2: Release the pipe-threading rope (5), thread the pipe-threading rope (5) into the through hole of the pressure seat (3), pre-press the pressure seat (3) at the end of the rust-removing connecting pipe (1), fill the air pipe (8) with compressed gas, the gas applies pressure to the traction head (10), the traction head (10) pulls the pipe-threading rope (5), and pulls the pipe-threading rope (5) into the rust-removing pipeline (2); Step 3: Spin seal, tighten the pressure seat (3), squeeze and deform the sealing packing (4), and the sealing packing (4) grips and seals the pipe rope (5); Step 4: Soaking with rust remover. The rust remover is transported from the filling and draining water pipe (7) to the pipeline (2) to be rusted by the delivery pump. The pipeline is fully soaked or intermittently humidified. Step 5: Pull out the pipe rope (5), and use the brush (6) on the outside of the pipe rope (5) to clean the rust-removed pipe (2).

4. The rust removal method for a slender pipe according to claim 3, characterized in that, In step five, after the rust spots have softened, compressed gas enters the rust-removing pipeline (2) from the air filling pipe (8) to flush the inner wall, and performs air-blowing or simultaneous air-water blowing.

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