CN113478311A

CN113478311A - Rust removal device for inner wall of pressure pipeline

Info

Publication number: CN113478311A
Application number: CN202110764955.4A
Authority: CN
Inventors: 代毅; 刘耀森; 余先利; 陈锐豪; 杨木伙
Original assignee: Shenzhen Bominwell Robotics Co ltd
Current assignee: Shenzhen Bomingwei Technology Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-10-08
Anticipated expiration: 2041-07-07
Also published as: CN113478311B

Abstract

The invention discloses a rust removing device for the inner wall of a pressure pipeline, wherein the rust removing device for the inner wall of the pressure pipeline comprises a handheld rod; the handheld rod is connected with one end of the protective shell, the driving motor and the power supply device are arranged in the protective shell, the drill bit is connected with the driving motor through a connecting shaft, the power supply device is used for supplying power to the driving motor, and the driving motor is used for driving the drill bit to move outside the protective shell; and the refuting pipe assembly comprises a refuting connecting pipe and an end cover, one end of the refuting connecting pipe is provided with a sealing connecting part used for being connected with the pipe body to be cleaned, the end cover detachably covers the other end of the refuting connecting pipe, an avoiding hole is formed in the end cover, and the handheld rod can extend out of the end cover from the avoiding hole. The technical scheme of the invention can remove rust on the inner wall of the pressure pipeline under the condition of normal operation of the pressure pipeline.

Description

Rust removal device for inner wall of pressure pipeline

Technical Field

The invention relates to the technical field of pipeline rust removal, in particular to a rust removal device for an inner wall of a pressure pipeline.

Background

The manifold below the exhaust valve of most pressure pipelines is rusted without loss of generality, the exhaust pipe (manifold) connected with the exhaust valve in the water supply pipeline is in a semi-liquid and semi-gas state for a long time, and the inner wall of the exhaust pipeline generates a large amount of rust blocks to reduce the pipe diameter of the inner wall, while in the existing process of detecting the pressure pipeline by using a pipeline robot, the detection robot needs to enter from the exhaust pipeline, and the rust blocks cause the pipe diameter of the exhaust pipe to reduce, so that the detection robot cannot enter to influence the detection work, on the other hand, if the water supply pipeline needs to stop working independently for removing the rust blocks of the exhaust pipe, the cost loss caused is overlarge, therefore, the rust blocks on the pipe wall of the exhaust pipe are removed in the normal operation process of the pressure pipeline, and a device for removing the rust blocks of a branch pipeline (the inlet pipe and the outlet pipe of the detection robot) is needed by the rust removing device, so as to enlarge the effective through-flow section of the exhaust pipe (manifold), namely the section perpendicular to the liquid flow direction, and ensure the operation of the detection robot.

Disclosure of Invention

The invention mainly aims to provide a rust removing device for the inner wall of a pressure pipeline, and aims to provide a device capable of removing rust under the condition that the pressure pipeline is normally operated.

In order to achieve the purpose, the invention provides a rust removing device for the inner wall of a pressure pipeline, which comprises a handheld rod; the handheld rod is connected with one end of the protective shell, the driving motor and the power supply device are arranged in the protective shell, the drill bit is connected with the driving motor through a connecting shaft, the power supply device is used for supplying power to the driving motor, and the driving motor is used for driving the drill bit to move outside the protective shell; and

refute and connect the subassembly, refute and connect the subassembly including refuting takeover and end cover, refute the one end of taking over and be equipped with and be used for carrying out the sealing connection portion connected with the body of treating the clearance, end cover detachably covers fit refute the other end of taking over, be equipped with on the end cover and dodge the hole, handheld pole can be followed keep away the hole and stretch out outside the end cover.

Optionally, a drain pipe is further arranged on the outer side of the refuting connection pipe, the drain pipe protrudes out of the refuting connection pipe, and the drain pipe is used for discharging rusty sewage.

Optionally, the drain pipe is provided with a ball valve for controlling the discharge of the sewage.

Optionally, the handheld rod is arranged in a hollow mode, the power supply device is a power supply cable, and the power supply cable extends into the protective shell from the cavity of the handheld rod and is connected with the driving motor.

Optionally, one end of the end cover connected with the connecting pipe is fixed in a sealing mode through a pipe clamp.

Optionally, the end cover is provided with a hand rod sleeve on two end faces of the avoiding hole, the hand rod sleeve is communicated with the avoiding hole, a sealing piece is arranged in the hand rod sleeve, and the peripheral surface of the handheld rod can be sealed by abutting the sealing piece.

Optionally, a connecting disc is arranged at the bottom of the handheld rod facing one end of the protective shell, and the connecting disc is connected with the protective shell in a sealing mode.

Optionally, the other end of the hand-held rod is hermetically fixed with a connecting block to protect the cable

Optionally, the protective housing includes the shell body, this internal chamber that holds that is formed with of shell, driving motor locates hold the intracavity, the one end of shell body is equipped with first dodge the mouth for the cable get into with driving motor connects, the other end of shell body is equipped with the second and dodges the mouth for the drill bit pass through the drive shaft with driving motor is connected.

Optionally, the protective housing is provided with a sealing element at a joint of the driving shaft and the second avoiding port, and the sealing element is used for preventing water from entering the accommodating cavity from the second avoiding port.

According to the technical scheme, the handheld rod, the derusting assembly and the connection pipe assembly are adopted, the connection pipe assembly comprises a connection pipe and an end cover capable of detachably covering the connection pipe, one end of the connection pipe is provided with a sealing connection part used for being connected with a pipe body to be cleaned, and the pipe body is connected in a sealing mode through the sealing connection part; handheld pole sealing connection rust cleaning assembly, rust cleaning assembly stretch into refute the connecting tube in, are equipped with on the end cover and dodge the hole, handheld pole can follow it stretches out to dodge the hole outside the end cover, drive the rust cleaning assembly through removing handheld pole and remove, so, need not to stop the normal operation of pipeline in the pipeline of area pressure such as delivery pipe, also can clear away the rust block of pipeline.

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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic perspective view of an embodiment of a rust removing apparatus for an inner wall of a pressure pipe according to the present invention;

FIG. 2 is a schematic sectional view showing the structure of the rust removing apparatus for the inner wall of the pressure pipe in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a partially enlarged view of fig. 2 at B.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Rust removal device for inner wall of pressure pipeline	334	Connecting disc
10	Hand-held rod	34	Power supply device
				20	Connecting block	341	Power supply cable
30	Rust removal assembly	40	Connecting pipe assembly
				31	Drill bit	41	End cap
32	Driving motor	411	Hand lever sleeve
				321	Drive shaft	42	Connecting pipe
33	Protective shell	421	Sealing connection
				331	Shell body	422	Drain pipe
332	First avoiding port	50	Pipe clamp
				333	Second avoiding port	60	Sealing element

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The manifold below the exhaust valve of most pressure pipelines is rusted without loss of generality, the exhaust pipe connected with the exhaust valve in the water supply pipeline is in a semi-liquid and semi-gas state for a long time, and the inner wall of the exhaust pipeline generates a large amount of rust blocks to reduce the pipe diameter of the inner wall, while in the existing process of detecting the pressure pipeline by using a pipeline robot, the detection robot needs to enter from the exhaust pipeline, and the rust blocks cause the reduction of the pipe diameter of the exhaust pipe, so that the detection robot cannot enter to influence the detection work, on the other hand, if the water supply pipeline is stopped to work for independently removing the rust blocks of the exhaust pipe, the cost loss caused is overlarge, therefore, the rust blocks on the pipe wall of the exhaust pipe are removed in the normal operation process of the pressure pipeline, and a device for removing the rust blocks of a branch pipeline (an inlet pipe and an outlet pipe of the detection robot) by using a rust removing device is needed, so as to enlarge the effective through-flow section of the exhaust pipe (manifold), namely the section perpendicular to the liquid flow direction, and ensure the operation of the detection robot.

The invention provides a rust removing device 100 for the inner wall of a pressure pipeline.

In an embodiment of the present invention, as shown in fig. 1 to 4, the rust removing apparatus 100 for an inner wall of a pressure pipe includes: a hand-held lever 10; the rust removal assembly 30 comprises a drill bit 31, a driving motor 32, a protective shell 33 and a power supply device 34, the handheld rod 10 is connected with one end of the protective shell 33, the driving motor 32 and the power supply device 34 are arranged in the protective shell 33, the drill bit 31 is connected with the driving motor 32 through a connecting shaft, the power supply device 34 is used for supplying power to the driving motor 32, and the driving motor 32 is used for driving the drill bit 31 to move outside the protective shell 33; and refute and connect the subassembly 40, refute and connect the subassembly 40 including refuting takeover 42 and end cover 41, refute the one end of connecting the pipe 42 and be equipped with and be used for carrying out the sealing connection portion 421 connected with the body of waiting to clear up, end cover 41 detachably covers the other end of refuting takeover 42, is equipped with the hole of dodging on the end cover 41, and handheld pole 10 can stretch out outside end cover 41 from the hole of dodging.

Taking a water supply pipeline as an example, a manifold branch is arranged on a main pipeline, under the condition that the manifold branch is opened, the medium water pressure of the water supply pipeline can be sprayed out from the manifold branch, the manifold branch is connected with a pipeline pressure pipeline auxiliary device generally, such as an exhaust valve and the like, the manifold branch is provided with a corresponding flange mounting disc generally, the lower end of the connection pipe 42 is provided with a corresponding flange mounting disc which is installed in a matched mode, a flange pad is added between two flange discs of two pipelines, and finally the two flange discs are tightened by bolts to form a detachable joint which is tightly combined. In this way, a connection between a stationary pipe and a rotating or reciprocating device can be achieved.

In this embodiment, as shown in fig. 1 and fig. 2, the sealing connection portion 421 adopts a flange manner, which facilitates the fitting of the manifold on one hand and has good sealing performance on the other hand. The connection formation of the flange of the connection pipe 42 may be classified into one of the following five types: flat welding, butt welding, socket welding, loose sleeve and thread. Specifically, the flange connection process flow can refer to the following steps, and firstly, the connection between the flange and the pipeline is required to meet the following requirements: the centers of the pipeline and the flange are on the same horizontal line; the center of the pipeline and the sealing surface of the flange form a 90-degree vertical shape; the positions of the flange bolts on the pipeline should be consistent correspondingly. Secondly, the flange gasket is cushioned, the requirements are as follows: in the same pipeline, the gaskets selected by the flanges with the same pressure need to be the same, so that the flanges can be conveniently exchanged later; for ducts using rubber sheets, the gaskets are preferably also rubber, such as water lines. The selection principle of the gasket is as follows: the selection is made as close to the small width as possible, which is a principle that should be followed on the premise that it is determined that the gasket will not be crushed. Thirdly, connecting a flange: checking whether the specifications of the flange, the bolt and the gasket meet the requirements; the sealing surface is kept smooth and tidy, and no burrs can be formed; the thread of the bolt is complete and cannot be damaged, and the embedding is natural; the gasket is flexible in texture, is not easy to age, and has no defects of breakage, wrinkles, scratches and the like on the surface; before assembling the flange, the flange is cleaned, impurities such as oil stains, dust and rust are removed, and the sealing line is removed completely. Fourthly, assembling a flange; the flange sealing surface is vertical to the center of the pipeline; bolts with the same specification are also arranged in the same direction; the mounting position of the flange mounted on the branch pipe should be more than 100 mm away from the outer wall surface of the stand pipe, and the distance from the flange mounted on the branch pipe to the wall surface of the building should be more than 200 mm.

In other embodiments, the sealing connection 421 can also be formed by a clamp 50 or a threaded sealing connection.

Specifically, with continuing reference to fig. 1 and 2, the other end of the connection pipe 42 is provided with an end cover 41, the shape of the connection pipe 42 can be understood by aid of a fire hydrant, the end cover 41 is detachably fixed to the connection pipe 42 in a sealing manner to prevent water from flowing out from the connection, in this embodiment, the end cover 41 and the connection pipe 42 are fixed by using a pipe clamp 50, and a sealing member 60 such as rubber is provided at the fixing position to ensure the sealing performance of the two. In other embodiments, the connection between the end cap 41 and the docking tube 42 may be fixed by a rotatable connection provided with the sealing member 60. In yet another embodiment, the connection between the end cap 41 and the connection tube 42 may be fixed by a screw thread. In addition, the material of the connection tube 42 and the end cap 41 may be various, including but not limited to, metal material, plastic, composite material, etc., and is not limited thereto. In addition, the cover caliber of the end cover 41 can be larger or smaller than the pipe diameter of the connection pipe 42, and the sealing connection is not affected.

Further, the rust blocks in the manifold are removed by a machine, comprising a hand-held rod 10 for holding; the structure and the size of the handheld rod 10 are not limited too much, the handheld rod 10 can be made of waterproof materials or other materials, and the handheld rod 10 is not too thick and is convenient to hold. Rust removal subassembly 30, including drill bit 31, driving motor 32, protective housing 33, power supply unit 34, handheld pole 10 is connected with protective housing 33 one end, and driving motor 32 and power supply unit 34 are located in protective housing 33, and drill bit 31 is connected with driving motor 32 through the connecting axle, and power supply unit 34 is used for supplying power to driving motor 32, and driving motor 32 is used for driving drill bit 31 and moves outside protective housing 33. The power supply device 34 may be an internal power supply or an external power supply, the driving motor 32 further has a switch for convenient control, and the protective shell 33 is used for preventing water from entering the power supply device 34 or the driving motor 32 and causing burning. It is to be understood that the electronic devices such as the power supply unit 34 and the driving motor 32 may be individually subjected to waterproofing for waterproofing. The drill 31 may be selected according to different cleaning needs, such as preliminary cleaning or fine cleaning. The end cover 41 is provided with an avoiding hole, so that the handheld rod 10 can penetrate through and can move relatively, the avoiding hole can be formed in the middle of the end cover 41, alignment is facilitated on one hand, and the rust blocks are cleared in the operation process on the other hand. The hand-held rod 10 and the avoiding hole can be sealed, so that water cannot leak in the moving process. Because the connection tube 42 has a certain length, the rust removing assembly 30 can be put into the connection tube 42 and then covered with the end cover 41, and the connection tube 42 is connected with the flange. Turning on a switch of a driving motor 32, and holding the handheld rod 10 to move the rust removing device to remove rust; the other way can be reversed in the connection step, and is not described herein again. In addition, the design of the scheme can not cause damage to the pipeline after rust removal, such as reduction of pipe wall thinning of the pipeline and the like, specifically, taking the branch pipeline as 80mm as an example, the minimum part of the caliber of the branch pipeline can be contracted to 30-50mm due to the irregularity of rust blocks, the caliber of the pipeline robot entering the branch pipeline can be 70mm, the caliber of the branch pipeline with the diameter of 30-50mm can be enlarged to about 75mm by the rust removal device, the pipeline robot can be ensured to smoothly enter, and thinning of the pipeline wall can not be caused.

According to the technical scheme, the handheld rod 10, the derusting assembly 30 and the connection pipe assembly 40 are adopted, the connection pipe assembly 40 comprises a connection pipe 42 and an end cover 41 which can detachably cover the connection pipe 42, one end of the connection pipe 42 is provided with a sealing connection part 421 used for being connected with a pipe body to be cleaned, and the pipe body is connected in a sealing mode through the sealing connection part 421; the handheld rod 10 is connected with the rust removal assembly 30 in a sealing mode, the rust removal assembly 30 extends into the connection pipe 42, the end cover 41 is provided with an avoidance hole, the handheld rod 10 can extend out of the end cover 41 through the avoidance hole, the handheld rod 10 is moved to drive the rust removal assembly 30 to move, and therefore rust blocks of a pipeline can be removed without stopping normal operation of the pipeline in the pipeline with pressure, such as a water supply pipe and the like.

Optionally, referring to fig. 1 and fig. 2, in order to discharge the removed impurities and avoid pollution, a drain pipe 422 is further disposed on the outer side of the connection pipe 42, the drain pipe 422 protrudes out of the connection pipe 42, and the drain pipe 422 is used for discharging the rusted sewage. As described above, the rust removing assembly 30 is pushed by the hand-held rod 10, the drill 31 is driven by the driving motor 32 to rotate, and the selection of the driving motor 32 and the drill 31 can be selected by those skilled in the art according to the needs, which is not limited to this, and is not described in detail for some conventional means such as physical connection. After the rust block is removed by the drill 31, the sewage mixed with the rust can flow up the connection pipe 42 and flow out of the outside along with the drainage pipe 422, so that the pollution is avoided. The side of the drainage pipe 422 is provided with a water flow which can ensure that the operator is not wetted by the water flow and the chaotic sewage can be discharged.

For convenient control, the drain pipe 422 is provided with a ball valve for controlling the discharge of the sewage. The ball valve (ball valve) is defined in the ball valve standard GB/T21465-2008 valve nomenclature as: the opening and closing piece (ball) is driven by the valve rod and rotates around the axis of the ball valve. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels. The valve of this type should be generally installed horizontally in the pipeline. Ball valve classification: pneumatic ball valves, electric ball valves, manual ball valves. The selection of the ball valve can be related to the setting according to the requirement, and only briefly mentioned here.

See fig. 2 for simplicity of construction and ease of operation. The handheld rod 10 is hollow, the power supply device 34 is a power supply cable 341, and the power supply cable 341 extends into the protective shell 33 from the cavity of the handheld rod 10 to be connected with the driving motor 32. In this embodiment, the driving motor 32 is connected to an external power source through a cable to rotate, because the rust removing device performs a waterproof process, a waterproof sealing property of a joint is ensured, and for the convenience of wiring, the hand-held lever 10 is conveniently wired through being hollow, because the external power source is lighter than the built-in power source rust removing device, and there is no limitation on the use time. In another embodiment, the power supply 34 may be provided with a built-in power supply or a combination of a built-in power supply and an external power supply in consideration of the needs of the scene.

Referring to fig. 1 and 2, the end cap 41 is detachably mounted. The end of the end cover 41 connected with the connection tube 42 is fixed by a pipe clamp 50 in a sealing way. The tube clamps 50 are classified according to materials commonly found in the market. Can be divided into a plastic ABS pipe clamp 50, an aluminum alloy pipe clamp 50, a stainless steel pipe clamp 50, a carbon steel pipe clamp 50 and the like. It will be appreciated that the manner of passing the tube clamp 50 is only one of the means of accomplishing the objective, and that those skilled in the art could also use alternatives, such as the threaded connection of the end cap 41 to the docking tube 42, without any inventive modifications; the end cover 41 is hinged with one end of the connecting pipe 42, so that the end cover 41 can rotate and the like.

In order to prevent water in the flashover connecting pipe 42 from flowing out from the avoiding hole of the end cover 41. The end cover 41 is provided with hand rod sleeves 411 on two end faces of the avoidance hole, the hand rod sleeves 411 are communicated with the avoidance hole, sealing elements 60 are arranged in the hand rod sleeves 411, and the peripheral surface of the handheld rod 10 can be abutted against the sealing elements 60 to be sealed. The surface of the hand-held rod 10 can be provided with a smooth or coated or protective layer, the hand rod sleeve 411 formed at the end cover 41 extends towards one end and the other end of the protective shell 33, a sealing element 60 is arranged in the sleeve opening or the sleeve, and a rubber elastic layer can be arranged in the sleeve in one condition, so that the sealing property is better. Thus, the handle bar case 411 has a certain length, and even if the handle bar 10 moves relative to the handle bar case 411, it does not cause water to overflow.

In order to ensure the tightness of the protective casing 33. The handheld rod 10 faces the bottom of one end of the protective shell 33, and a connecting disc 334 is arranged at the bottom of one end of the protective shell 33 and is connected with the connecting disc 334 in a sealing mode. As seen in cross section, the connecting plate 334 has a certain height, and the connecting plate 334 and the hand-held pole 10 can be integrally formed, so that the sealing performance is better. The connection mode of the connection disc 334 and the protection shell 33 can adopt waterproof adhesive, or a groove is formed at the protection shell 33, a protrusion formed on the connection disc 334 is sealed and fixed through a physical mode, and on the basis, additional waterproof processing and the like can be added.

In connection with fig. 3, for waterproofing of the cable. The other end of the hand-held rod 10 is hermetically fixed with a connection block 20 to protect the cable. For protection, the handheld rod 10 is hollow, and the protective shell 33 and the driving device of the rust removing assembly 30 which need to be contacted with water are waterproof in connection and material, but the other end of the hollow handheld rod 10 may cause water to enter, such as rainy days.

With reference to fig. 4, understandably, the protective housing 33 includes a housing body 331, a housing cavity is formed in the housing body 331, the driving motor 32 is disposed in the housing cavity, one end of the housing body 331 is provided with a first avoiding port 332 for the cable to enter and be connected with the driving motor 32, and the other end of the housing body 331 is provided with a second avoiding port 333 for the drill bit 31 to be connected with the driving motor 32 through a driving shaft 321. The housing body 331 may be treated for waterproofing, such as adding an organic coating. The first avoiding opening 332 of the shell body 331 is arranged to facilitate the power supply cable 341 to enter the shell body 331 to be connected with the driving motor 32, the power supply cable 341 to pass through the hollow part of the handheld rod 10, and the second avoiding opening 333 is arranged to facilitate the connection between the driving shaft 321 and the drill 31. It is easy to understand that the joint needs to be waterproof. The protective shell 33 is provided with a sealing element 60 at the joint of the driving shaft 321 and the second avoiding port 333, and the sealing element 60 is used for preventing water from entering the accommodating cavity from the second avoiding port 333.

The above description is given by way of example of a pressurized water supply pressure line, and it will be understood that other pressure lines with pressure need only be applied, such as some gas lines, etc. Simple changes are made.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A rust removing device for an inner wall of a pressure pipeline is characterized by comprising:

a hand-held wand;

the handheld rod is connected with one end of the protective shell, the driving motor and the power supply device are arranged in the protective shell, the drill bit is connected with the driving motor through a connecting shaft, the power supply device is used for supplying power to the driving motor, and the driving motor is used for driving the drill bit to move outside the protective shell; and

2. The rust removing apparatus for the inner wall of the pressure pipe as claimed in claim 1, wherein a drain pipe is further provided at an outer side of the connection pipe, the drain pipe protrudes from the connection pipe, and the drain pipe is used for discharging the rusty sewage.

3. A rust removing apparatus for an inner wall of a pressure pipe as claimed in claim 2, wherein said water discharge pipe is provided with a ball valve for controlling discharge of said sewage.

4. The rust removing device for the inner wall of the pressure pipeline as claimed in any one of claims 1 to 3, wherein the handheld rod is arranged in a hollow manner, the power supply device is a power supply cable, and the power supply cable extends into the protective shell from the cavity of the handheld rod and is connected with the driving motor.

5. The rust removing device for the inner wall of the pressure pipe as claimed in claim 1, wherein one end of the end cover connected with the connection pipe is fixed by sealing through a pipe clamp.

6. The rust removing device for the inner wall of the pressure pipeline as claimed in claim 5, wherein hand rod sleeves are provided on both end faces of the end caps at the avoiding hole, the hand rod sleeves are communicated with the avoiding hole and provided with sealing members, and the outer peripheral surface of the hand rod can abut against the sealing members to be sealed.

7. The rust removing device for the inner wall of the pressure pipeline as claimed in claim 1, wherein a connecting disc is arranged at the bottom of one end of the handheld rod, which faces the protective shell, and the connecting disc is connected with the protective shell in a sealing manner.

8. The rust removing apparatus for the inner wall of a pressure pipe as claimed in claim 7, wherein a connection block is sealingly fixed to the other end of the hand-held rod to protect the wire.

9. The rust removing device for the inner wall of the pressure pipeline as claimed in claim 1, wherein the protective shell comprises a shell body, a containing cavity is formed in the shell body, the driving motor is arranged in the containing cavity, a first avoiding port is formed at one end of the shell body for allowing a cable to enter and be connected with the driving motor, and a second avoiding port is formed at the other end of the shell body for allowing a drill bit to be connected with the driving motor through a driving shaft.

10. The rust removing device for the inner wall of the pressure pipe as claimed in claim 9, wherein the protective shell is provided with a sealing member at the joint of the driving shaft and the second avoiding port, and the sealing member is used for preventing water from entering the accommodating cavity from the second avoiding port.