CN113478311B

CN113478311B - Rust removing device for inner wall of pressure pipeline

Info

Publication number: CN113478311B
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: 2023-05-16
Anticipated expiration: 2041-07-07
Also published as: CN113478311A

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 hand-held rod; the rust removing assembly comprises a drill bit, a driving motor, a protective shell and a power supply device, wherein 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 connecting pipe assembly comprises a connecting pipe and an end cover, one end of the connecting pipe is provided with a sealing connection part used for being connected with a pipe body to be cleaned, the end cover is detachably covered at the other end of the connecting pipe, the end cover is provided with an avoidance hole, and the hand-held rod can extend out of the end cover from the avoidance hole. The technical scheme of the invention can remove rust on the inner wall of the pressure pipeline under the condition that the pressure pipeline normally operates.

Description

Rust removing 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 the inner wall of a pressure pipeline.

Background

The manifold of the exhaust valve of the pressure pipeline below has corrosion in most parts, the exhaust pipe (manifold) connected with the exhaust valve in the water supply pipeline is in semi-liquid and semi-gas state for a long time, a large number of rust blocks are generated on the inner wall of the exhaust pipeline, so that the pipe diameter of the inner wall is reduced, in the existing pipeline robot detection process, the detection robot needs to enter from the exhaust pipeline, the pipe diameter of the exhaust pipe is reduced due to the rust blocks, the detection robot cannot enter to influence the detection work, on the other hand, if the water supply pipeline is stopped to be used for cleaning the rust blocks of the exhaust pipe independently, the cost loss is overlarge, therefore, a rust removing device is needed to clean rust blocks of the pipe wall of the exhaust pipe in the normal operation process of the pressure pipeline, so that the effective through flow section of the exhaust pipe (manifold), namely the section perpendicular to the flow direction of the liquid is enlarged, and the operation of the detection robot is ensured.

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 operated normally.

In order to achieve the above purpose, the rust removing device for the inner wall of the pressure pipeline provided by the invention comprises a handheld rod; the rust removing assembly comprises a drill bit, a driving motor, a protective shell and a power supply device, wherein 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 connecting pipe assembly comprises a connecting pipe and an end cover, wherein one end of the connecting pipe is provided with a sealing connection part used for being connected with a pipe body to be cleaned, the end cover is detachably covered on the other end of the connecting pipe, an avoidance hole is formed in the end cover, and the handheld rod can extend out of the end cover from the avoidance hole.

Optionally, the outside of connecting pipe still is equipped with the drain pipe, the drain pipe protrusion connecting pipe, the drain pipe is used for discharging the sewage of taking rust.

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

Optionally, the handheld pole is the cavity setting, power supply unit is power supply cable, power supply cable follow handheld pole's cavity stretches into in the protective housing with driving motor is connected.

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

Optionally, the end cover is in dodge the both ends face in hole department is equipped with the hand lever sleeve pipe, hand lever sleeve pipe intercommunication dodge the hole just be equipped with the sealing member in the hand lever sleeve pipe, the outer peripheral face of hand lever can with the butt of sealing member is sealed.

Optionally, the bottom of handheld pole orientation one end of protective housing is equipped with the connection pad, the connection pad with protective housing sealing connection.

Optionally, a connecting block is fixed at the other end of the handheld rod in a sealing way 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 mouthful for the cable to get into with driving motor is connected, the other end of shell body is equipped with the second and dodges mouthful for the drill bit through the drive shaft with driving motor is connected.

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

According to the technical scheme, the hand-held rod, the rust removing assembly and the connecting pipe assembly are adopted, the connecting pipe assembly comprises a connecting pipe and an end cover of the detachable cover-combined connecting pipe, one end of the connecting pipe is provided with a sealing connecting part used for connecting a pipe body to be cleaned, and the connecting pipe body is sealed through the sealing connecting part; the hand-held rod is in sealing connection with the rust removing assembly, the rust removing assembly stretches into the connecting pipe, the end cover is provided with the avoidance hole, the hand-held rod can extend out of the end cover from the avoidance hole, and the rust removing assembly is driven to move by moving the hand-held rod, so that the normal operation of the pipeline does not need to be stopped in a pipeline with pressure such as a water supply pipe and the like, and rust blocks of the pipeline can be removed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic cross-sectional view of a rust removing device for the inner wall of the pressure pipeline in fig. 1;

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

fig. 4 is a partial enlarged view at B in fig. 2.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Rust removing device for inner wall of pressure pipeline	334	Connecting disc
10	Hand-held lever	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	Driving shaft	42	Connection pipe
33	Protective housing	421	Sealing connection part
				331	Shell body	422	Drain pipe
332	First avoidanceYielding mouth	50	Pipe clamp
				333	Second avoidance port	60	Sealing element

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The manifold of the exhaust valve of the vast majority of pressure pipelines has rust inside, the exhaust pipe connected with the exhaust valve in the water supply pipeline is in semi-liquid and semi-gas state for a long time, a large number of rust blocks are generated on the inner wall of the exhaust pipeline, so that the pipe diameter of the inner wall is reduced, in the existing pipeline robot detection process, the detection robot needs to enter from the exhaust pipeline, the rust blocks lead to 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 cleaning the rust blocks of the exhaust pipe alone, the cost loss is too large, therefore, the rust blocks on the pipe wall of the exhaust pipe are cleaned in the normal operation process of the pressure pipeline, and the rust cleaning device is required to clean the rust blocks of the branch pipeline (the inlet pipe and the outlet pipe of the detection robot) so as to enlarge the effective through flow section of the exhaust pipe (manifold), namely the section perpendicular to the flow direction of the liquid, so as to 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 device 100 for the inner wall of the pressure pipe includes: a hand-held lever 10; the rust removing assembly 30 comprises a drill bit 31, a driving motor 32, a protective shell 33 and a power supply device 34, wherein 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 the connection pipe assembly 40, the connection pipe assembly 40 comprises a connection pipe 42 and an end cover 41, one end of the connection pipe 42 is provided with a sealing connection part 421 for connecting with a pipe body to be cleaned, the end cover 41 is detachably covered at the other end of the connection pipe 42, the end cover 41 is provided with an avoidance hole, and the hand-held rod 10 can extend out of the end cover 41 from the avoidance hole.

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

In this embodiment, as shown in fig. 1 and 2, the sealing connection portion 421 adopts a flange manner, so that on one hand, the manifold is conveniently adapted, and on the other hand, the tightness is good. The connection forming manner of the flange of the docking tube 42 can be divided into one of the following five ways: flat welding, butt welding, socket welding, loose sleeve and screw thread. Specifically, the flange connection process flow can be referred to as follows, and first, the connection between the flange and the pipeline meets 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 are in a vertical shape of 90 degrees; the positions of the flange bolts on the pipes should be correspondingly consistent. Second, the gasket flange is required as follows: in the same pipeline, gaskets selected by flanges with the same pressure are required to be the same, so that the gaskets are convenient to exchange with each other later; for pipes using rubber sheets, the gaskets are preferably also rubber, such as water lines. The selection principle of the gasket is as follows: as close as possible to the small width is the principle that should be followed if it is determined that the gasket is not to be crushed. Thirdly, a connecting flange: checking whether the specifications of the flange, the bolt and the gasket meet the requirements; the sealing surface needs to be kept smooth and clean and can not have burrs; the screw thread of the bolt is complete, cannot be defective and is naturally embedded; the gasket is flexible in texture, not easy to age, and free of defects such as breakage, wrinkling, scratch and the like on the surface; before the flange is assembled, the flange is cleaned, sundries such as greasy dirt, dust, rust and the like are removed, and the sealing line is removed. Fourth, assembling a flange; the flange sealing surface is vertical to the center of the pipeline; bolts with the same specification have the same installation direction; the flange mounting position on the branch pipe should be 100 mm or more from the outer wall surface of the riser, and 200 mm or more from the wall surface of the building.

In other embodiments, the sealing connection 421 may be formed by a pipe clip 50 or a threaded sealing connection.

Specifically, referring to fig. 1 and 2, the other end of the connection pipe 42 is provided with an end cap 41, the shape of the connection pipe 42 can be understood with assistance of a fire hydrant, the end cap 41 is detachably fixed with the connection pipe 42 in a sealing manner to prevent water from flowing out of the connection point, in this embodiment, the end cap 41 and the connection pipe 42 are fixed by using a pipe clamp 50, and sealing members 60 such as rubber are provided at the fixing points to ensure the tightness of the end cap 41 and the connection pipe 42. In other embodiments, the connection between the end cap 41 and the connector tube 42 may be secured in the seal 60 by a rotational connection. In yet another embodiment, the connection between the end cap 41 and the connector tube 42 may be secured by a threaded manner. In addition, since the materials of the connection tube 42 and the end cap 41 may be variously employed, including, but not limited to, metallic materials, plastics, composite materials, and the like, this is not limited thereto. In addition, the cap diameter of the end cap 41 may be larger or smaller than the tube diameter of the connection tube 42 without affecting the sealing connection.

Further, the rust in the manifold is removed by a machine, comprising a hand-held rod 10 for holding; the structure and the size of the handheld rod 10 are not excessively limited, the handheld rod 10 can be made of waterproof materials or other materials, the handheld rod 10 is not excessively thick, and the handheld rod 10 is convenient to grasp and suitable. The rust removal assembly 30 comprises a drill bit 31, a driving motor 32, a protective shell 33 and a power supply device 34, wherein 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. The power supply device 34 can be a built-in power supply or an external power supply, the driving motor 32 is also provided with a switch, the control is convenient, and the protective shell 33 is used for preventing water from entering the power supply device 34 or the driving motor 32 to cause burning. It will be appreciated that the electronics such as the power supply 34 and the drive motor 32 may be separately waterproofed for the purpose of waterproofing. The drill 31 may be selected for different cleaning needs, such as primary cleaning or fine cleaning. The end cover 41 is provided with an avoidance hole, so that the handheld rod 10 can pass through and relatively move, the avoidance hole can be arranged at a relatively central position of the end cover 41, on one hand, the positioning is convenient, and on the other hand, rust is cleared in the operation process. The hand-held rod 10 and the avoiding hole can be sealed, so that water does not leak in the moving process. Because the spider 42 has a certain length, the rust removing assembly 30 can be placed in the spider 42 and then covered with the end cap 41, and then connected with the spider 42 through the flange. Turning on the switch of the driving motor 32 to control the hand-held rod 10 to move the rust removing device to remove rust; the other way around the connection step is not described here. In addition, the design of this scheme can not cause harm to the pipeline after rust removal, if reduce the pipe wall thinning etc. of pipeline, specifically take the manifold pipeline as 80mm for the example, because the irregularity of rust, manifold pipeline bore minimum department probably contracts to 30-50mm, and pipeline robot gets into in the manifold and probably need 70mm bore, and rust cleaning device can enlarge 30-50 mm's manifold pipeline bore to about 75mm, guarantees that pipeline robot can get into smoothly, also can not cause the thinning of pipeline wall.

According to the technical scheme, the handheld rod 10, the rust removing assembly 30 and the connecting pipe assembly 40 are adopted, the connecting pipe assembly 40 comprises a connecting pipe 42 and an end cover 41 for detachably covering the connecting pipe 42, one end of the connecting pipe 42 is provided with a sealing connecting part 421 for connecting a pipe body to be cleaned, and the connecting pipe body is sealed through the sealing connecting part 421; the hand-held rod 10 is in sealing connection with the rust removing assembly 30, the rust removing assembly 30 stretches into the connecting pipe 42, the end cover 41 is provided with an avoidance hole, the hand-held rod 10 can stretch out of the end cover 41 from the avoidance hole, and the rust removing assembly 30 is driven to move by moving the hand-held rod 10, so that normal operation of a pipeline does not need to be stopped in a pipeline with pressure such as a water supply pipe, and rust of the pipeline can be removed.

Optionally, referring to fig. 1 and 2, in order to enable the removed impurities to be discharged, and avoid pollution, a drain pipe 422 is further disposed on the outer side of the connection pipe 42, the drain pipe 422 protrudes from 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 bit 31 is driven by the driving motor 32 to rotate, and the driving motor 32 and the drill bit 31 are selected according to the need, so that the selection is not limited to the above, and some conventional means for physical connection modes and the like are not repeated. After the rust is removed by the drill 31, the rust mixed sewage water can flow up the connection pipe 42 and flow out along with the water discharge pipe 422, so that pollution is avoided. The drain pipe 422 is arranged on the side surface to ensure that water flow does not wet operators and can drain chaotic sewage.

For convenience of control, the drain pipe 422 is provided with a ball valve for controlling the sewage discharge. Ball valve (ball valve) standard GB/T21465-2008 valve terminology is defined as: the opening and closing part (ball) is driven by the valve rod and rotates around the axis of the ball valve. The device can also be used for regulating and controlling fluid, wherein the hard seal V-shaped ball valve has strong shearing force between the V-shaped ball core and the metal valve seat of the hard alloy for surfacing, and is particularly suitable for mediums containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the flow direction switching of the medium on the pipeline, and simultaneously can close any channel to connect the other two channels. The valve should be installed generally horizontally in the pipeline. Ball valve classification: pneumatic ball valve, electric ball valve, manual ball valve. The choice of ball valve can be set as desired and is only briefly mentioned here.

See fig. 2 for simplicity of construction, ease of operation. The hand-held 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 hollow cavity of the hand-held rod 10 and is connected with the driving motor 32. In this embodiment, the driving motor 32 is connected to the external power source through the cable to rotate, because the rust removing device performs the waterproof treatment, the waterproof sealing property of the connection is ensured, and for the convenience of wiring, the handheld rod 10 is hollow to facilitate wiring, because the external power source is more portable than the built-in power source rust removing device, and the limitation of the service time does not exist. In another embodiment, the power supply device 34 may be provided with a built-in power supply or a combination scheme 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 quickly detachable. The end cap 41 is sealed and fixed by a pipe clamp 50 at the end connected with the connection pipe 42. The tube clamp 50 is classified according to the usual materials of the market. The pipe clamp 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, etc. It will be appreciated that the manner in which the tube clamp 50 is provided is only one of the means by which it is achieved, and that the person skilled in the art can, without any inventive modification, use alternative means such as screwing the end cap 41 with the connection tube 42; the end cover 41 is hinged with one end of the connection pipe 42, so that the end cover 41 can rotate and the like.

To prevent water from flowing out of the relief holes of the end cap 41 in the up-flow connection tube 42. The end cover 41 is provided with a handle sleeve 411 at two end surfaces of the avoidance hole, the handle sleeve 411 is communicated with the avoidance hole, a sealing member 60 is arranged in the handle sleeve 411, and the outer circumferential surface of the hand-held rod 10 can be abutted against the sealing member 60 to seal. The surface of the hand-held rod 10 may be provided with a relatively smooth or coated surface or may be provided with a protective layer, the hand-held rod sleeve 411 formed at the end cap 41 extends in the direction of one end and the other end of the protective shell 33, and the sleeve mouth or sleeve is provided with a sealing member 60, in which case a rubber elastic layer may be provided for better sealing. Thus, the hand lever sleeve 411 has a length that does not cause water to overflow even if the hand lever 10 is moved relative to the hand lever sleeve 411.

To ensure the tightness of the protective case 33. The bottom of handheld pole 10 orientation protective housing 33 one end is equipped with connection pad 334, connection pad 334 with protective housing 33 sealing connection. The connecting disc 334 has a certain height in the section, and the connecting disc 334 and the handheld rod 10 can be integrally formed, so that the sealing performance is better. The connection mode of the connection disc 334 and the protective shell 33 can adopt waterproof adhesion, or a groove is formed at the position of the protective shell 33, the connection disc 334 is formed to be protruded to be sealed and fixed in a physical mode, and additional waterproof treatment and the like can be added on the connection mode.

In connection with fig. 3, the waterproof of the cable is intended. The other end of the hand-held rod 10 is fixed with a connecting block 20 in a sealing manner to protect the cable. For protection, the hand-held pole 10 is hollow, and the protective shell 33 and the driving device of the rust removing assembly 30 which needs to be contacted with water are connected and subjected to waterproof treatment on materials, but the other end of the hollow hand-held pole 10 can possibly cause water to enter, such as rainy days.

With reference to fig. 4, it may be understood that 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, a first avoidance port 332 is disposed at one end of the housing body 331 for a cable to enter and be connected with the driving motor 32, and a second avoidance port 333 is disposed at the other end of the housing body 331 for the drill bit 31 to be connected with the driving motor 32 through the driving shaft 321. The case body 331 may be waterproofed, for example, by adding an organic coating or the like. The first avoidance port 332 of the case body 331 is provided to facilitate connection of the power supply cable 341 into the case body 331 and the driving motor 32, and also facilitates connection of the power supply cable 341 from the driving shaft 321 and the drill bit 31 through the hollow portion of the hand-held rod 10, and the second avoidance port 333 is provided to facilitate connection of the hand-held rod 10. It is to be understood that the joints need to be waterproofed. The protecting shell 33 is provided with a sealing member 60 at the junction of the driving shaft 321 and the second avoidance port 333, and the sealing member 60 is used for preventing water from entering the accommodating cavity from the second avoidance port 333.

The foregoing is illustrative of a pressurized water supply pressure conduit, it being understood that other pressurized conduits need only be utilized depending on the application, such as some gas conduits, etc. Simple changes are made.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. The utility model provides a rust cleaning device of pressure pipeline inner wall which characterized in that includes:

a hand-held lever;

the rust removing assembly comprises a drill bit, a driving motor, a protective shell and a power supply device, wherein 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 device for the inner wall of a pressure pipeline according to claim 1, wherein a drain pipe is further provided at the outer side of the connection pipe, the drain pipe protrudes out of the connection pipe, and the drain pipe is used for discharging rusted sewage.

3. The apparatus for removing rust from the inner wall of a pressure pipe according to claim 2, wherein said drain pipe is provided with a ball valve for controlling said discharge of said sewage.

4. A rust removing device for an inner wall of a pressure pipeline according to any one of claims 1 to 3, wherein the handheld rod is hollow, the power supply device is a power supply cable, and the power supply cable extends into the protective shell from the hollow of the handheld rod and is connected with the driving motor.

5. The rust removing device for the inner wall of a pressure pipe according to claim 1, wherein the end of the end cap connected to the connection pipe is sealed and fixed by a pipe clamp.

6. The rust removing device for the inner wall of a pressure pipeline according to claim 5, wherein two end surfaces of the end cover at the avoidance hole are provided with hand rod sleeves, the hand rod sleeves are communicated with the avoidance hole, sealing elements are arranged in the hand rod sleeves, and the outer peripheral surface of the hand rod can be abutted against the sealing elements to seal.

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

8. The rust removing apparatus for an inner wall of a pressure pipe according to claim 7, wherein the other end of the hand-held lever is hermetically fixed with a connection block to protect the cable.

9. The rust removing device for the inner wall of a pressure pipeline according to 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 opening is formed in one end of the shell body for a cable to enter and be connected with the driving motor, and a second avoiding opening is formed in the other end of the shell body for a drill to be connected with the driving motor through a driving shaft.

10. The rust removing device for the inner wall of a pressure pipeline according to claim 9, wherein the protecting shell is provided with a sealing member at the joint of the driving shaft and the second avoiding opening, and the sealing member is used for preventing water from entering the accommodating cavity from the second avoiding opening.