CN112049201A

CN112049201A - Pipeline dredging rod with scraper

Info

Publication number: CN112049201A
Application number: CN202011041484.6A
Authority: CN
Inventors: 龙宏元
Original assignee: Huaihua Wopu Environmental Protection Technology Co ltd
Current assignee: Huaihua Wopu Environmental Protection Technology Co ltd
Priority date: 2020-01-13
Filing date: 2020-09-28
Publication date: 2020-12-08
Also published as: CN114991268A

Abstract

The invention discloses a pipeline dredging rod with a scraper, which aims to solve the problem that the traditional pipeline dredging tool is complex to use. The device can simply and conveniently dredge the pipeline, particularly the sewer, and does not need professional personnel to operate, so that the device has popularization and generalization.

Description

Pipeline dredging rod with scraper

Technical Field

The invention relates to anti-blocking and dredging of a sewer, in particular to a pipeline dredging tool with a scraper for dredging the sewer or a pipeline.

Background

For many years, the problem that the pipeline is blocked due to the collection of grease in sewer pipelines in resident families, especially kitchen sewer, the daily life of people has been puzzled because of the difficult problem that the manual mediation is difficult to too much in the bend, especially the sanitation problem that causes behind the water pipe blockage is more restless, though there are manifold water pipeline mediation machinery today, but effectual all structure is complicated, need professional technical personnel to operate, simple is difficult to effectively dredge the pipeline that has blockked up again, therefore people expect that simple effectual mediation instrument can carry out quick mediation to the sewer pipeline that has blockked up.

Disclosure of Invention

In order to solve the problem that the traditional pipeline dredging tool is complex to use, the invention provides a pipeline dredging rod with a scraper, which comprises a soft rod and an expanded dredging head, wherein the expanded dredging head is a mechanism or a structure with the scraper, and the mechanism or the structure is arranged in an expanded area.

The pipeline dredging rod with the scraper is characterized in that a soft rod is used as a main body, and the soft rod is a bendable pipeline, or a bendable rod; the bendable pipeline is a flexible pipeline capable of being bent in the radial direction, or a conjoined pipeline capable of being bent in the radial direction and segmented into rigid sections; the bendable rod or bar is a flexible rod or bar capable of being bent in the radial direction, or a conjoined rod or bar capable of being bent in the radial direction and being segmented or segmented into rigidity.

The pipeline dredging rod with the scraper is a mechanism or a structure which is used for setting an expansion dredging head in an expansion area to be larger than a dredging rod main body in periphery and is provided with the scraper, and the scraper is a scraping blade or a scraping ring with clear edges and corners.

The pipeline dredging rod with the scraper is characterized in that the expansion dredging head is set to be a rigid expansion dredging head with the scraper, or a folding or elastic variable expansion dredging head with the scraper.

The pipeline dredging rod with the scraper is characterized in that an expansion area of an expansion dredging head with the scraper is provided with arc-shaped scraping rings or scraping pieces protruding at intervals; or a plurality of circular arcs or circular rings with non-coincident centers and clear peripheral edges and corners are arranged in the expansion area; or a chain ring with clear edge angles on the periphery.

The pipeline dredging rod with the scraper is characterized in that a pressure limiting valve is arranged between an expansion area and a dredging rod main body; or the elastic pressure-limiting sleeve with stable and reliable mechanical property is arranged on the variable expansion area.

The pipeline dredging rod with the scrapers is provided with more than two expanding dredging heads with scrapers with different outer diameters.

The pipeline dredging rod with the scraper is characterized in that a fluid pressure regulating device is arranged on a sealed flexible pipeline.

The utility model provides a pipeline dredging rod of ware is scraped in area, it is for conveniently changing the enlarged dredging head or link together two or more soft sticks and set up the interface, the interface is for setting up the restricted coupling mechanism or the structure of two-way rotation each other between soft stick and enlarged dredging head, or between soft stick and soft stick, prevents rotation each other between the interface.

The pipeline dredging rod with the scraper is characterized in that a curved guide rod capable of freely rotating in the radial direction is arranged at the front end of an expanding dredging head.

The invention has the beneficial effects that: the dredging operation of the pipeline, particularly the dredging operation of a sewer, is simple and convenient, and does not need professional personnel to operate, so that the device has popularization and popularity.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of embodiment 1 of the present invention;

FIG. 6 is a schematic view of the structure of an expanded region in example 1 of the present invention;

FIG. 7 is a schematic view of the structure of a guide bar according to embodiment 2 of the present invention;

FIG. 8 is a schematic diagram of an interface structure according to embodiment 3 of the present invention;

FIG. 9 is a schematic diagram of an interface structure according to embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of an interface structure according to embodiment 3 of the present invention;

FIG. 11 is a schematic diagram of an interface structure according to embodiment 3 of the present invention;

FIG. 12 is a schematic cross-sectional view of an enlarged dredging head according to example 1 of the present invention;

FIG. 13 is a schematic cross-sectional view of an enlarged dredging head according to example 1 of the present invention;

FIG. 14 is a schematic structural view of embodiment 1 of the present invention;

fig. 15 is a schematic structural view of embodiment 1 of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.

Example 1

Referring to figure 1, a secondary hose [5] is arranged in a main hose [3] (namely a pipeline main body), the length of the secondary hose [5] is larger than that of the main hose [3], a plurality of folds [2] are processed at the front end of the secondary hose [5] extending out of the main hose [3] to form a variable expansion area [26], the front end part of the secondary hose [5] can expand under the action of pressure to enlarge the cross section or contact with the pipe wall of a sewer, a scraping blade [1] is arranged at the variable expansion area [26] at the front end of the secondary hose [5], the scraping blade [1] is preferably arranged on the secondary hose [5] in a front-back and left-right multi-piece interval mode in a transverse or inclined mode, the edge angle or the pause state of the periphery of the scraping blade [1] is preferably arranged, and the edge angle or the pause state (namely the sharp periphery surface and the front-back side surface, namely the corner of the front-back end surface are preferably sharp edge angle without radian), which is favorable for, an elastic component or element is arranged on the periphery of the variable expansion area [26] at the front end of the secondary hose [5] or between the transverse sides of the scraping blade [1], so that the variable expansion area [26] at the front end of the secondary hose [5] is always in a contraction state under the action of no pressure, the main hose [3] can smoothly extend into a sewer, a fluid valve [4] is arranged at the tail end or a proper position of the main hose [3] and the secondary hose [5], and the fluid valve [4] can also be arranged on a connecting pipe communicated with the main hose [3] and the secondary hose [5], so that fluid (liquid or gas) with proper pressure can be conveniently injected into the hoses.

In the embodiment, the main hose [3] can be an independent hollow circular ring-shaped sealed long pipe, or the main hose [3] and the secondary hose [5] can be processed into an integrated combined main hose and secondary hose, namely, the pipe wall outside the middle part or the fold [2] area of the secondary hose is used as the inner wall of the main hose and is connected with the main hose in a sealing way.

When dredging the sewer, firstly, a proper amount of fluid is filled into the main hose [3] through the fluid valve [4] of the main hose [3] to straighten the main hose [3], then the front end of the main hose [3] extends into the blocked position of the sewer, the main hose [3] can be directly used for pumping forwards and backwards to dredge the sewer properly in the earlier stage, after the sewer is dredged properly by the main hose [3], a proper amount of fluid is filled into the secondary hose [5] through the fluid valve [4] of the secondary hose [5] to enable the front end of the secondary hose [5] to be expanded properly and the cross section of the secondary hose to be larger than that of the main hose [3], at the moment, the hose is pumped forwards and backwards, water flow with proper flow is drained into the sewer, and when the secondary hose is pumped forwards and backwards, dirt in the drain pipe is scraped by the scraping blade [1] and flows into a drainage system along with. When the sewer is dredged, when the front end of the main hose [3] extends into the blocked position of the sewer, the secondary hose [5] can be directly filled with a proper amount of fluid to ensure that the front end of the secondary hose [5] is properly expanded and the cross section of the secondary hose is larger than that of the main hose [3], then the hose is pulled, dirt is directly scraped by the scraping blade [1] and flows into a drainage system along with water flow, and the friction between the main hose [3] and a drainage pipe or the dirt is reduced.

In this embodiment, when fluid is injected into the previous hose [5], the fluid can be injected for multiple times, so that the front end of the hose [5] gradually expands for multiple times, and the hose is pumped back and forth to gradually dredge a sewer after injection every time, thereby reducing the difficulty of dredging work and improving the dredging effect.

In the embodiment, the main hose [3] can be replaced by a hollow hose or a soft rod which can be bent in the radial direction and has small axial deformation when external force is applied. Similarly, one end of a hollow hose or a hollow flexible rod which can be bent in the radial direction and has small axial deformation when external force acts is connected with an expansion area which can expand when internal pressure exists and is provided with a scraping blade [1] at the periphery, and one end of the hollow hose or the hollow flexible rod is connected with a fluid valve [4] instead of the secondary hose [5 ].

With reference to fig. 2, in this embodiment, the coil spring [6] can be directly used to replace the main hose [3] to make the hose, soft material or soft rod main body, at this time, the expansion area of the secondary hose [5] can be installed in the space at the front end of the coil spring [6], the wiper [1] can be installed in the gap between two circles of coil springs [6], and at this time, the corner between the periphery of the coil spring at the front end of the coil spring [6] and the front and rear side faces of the turn can be sharpened or suspended, which is beneficial for the coil spring [6] to directly wipe off the dirt in the drain pipe; the expansion area of the secondary hose [5] can also extend out of the front end of the coil spring [6], so that the expansion space of the expansion area of the secondary hose [5] is larger, and the effect is better.

With reference to fig. 3, based on the foregoing embodiment, a pressure regulating cavity [16] is further connected outside the flexible pipe fluid valve [4], the pressure regulating cavity [16] can be communicated with the flexible pipe through a connecting pipe [17], the fluid valve [4] is installed on the connecting pipe [17], a valve [18] is installed on the pressure regulating cavity [16] for injecting fluid, a connecting pipe [19] can be installed on the pressure regulating cavity [16] to be communicated with the outside or a fluid device, and the valve [18] can be installed on the connecting pipe [19 ]. Before dredging the sewer, the pressure regulating cavity (16) is filled with a proper amount of fluid, and then the valve (18) is closed or is communicated with a proper fluid device. When dredging a sewer, the fluid valve [4] of the main hose [3] is opened, then the pressure regulating cavity [16] is compressed or pressurized to ensure that the main hose [3] is injected with a proper amount of fluid and straightened, and then the fluid valve [4] is closed or the pressure regulating cavity [16] is always kept at a proper pressure, so that the length of the main hose [3] can be kept basically unchanged or not compressed when the main hose is drawn back and forth in a drainage pipe; then the fluid valve [4] of the secondary hose [5] is opened in due time, the pressure regulating cavity [16] is compressed or pressurized to ensure that the secondary hose [5] injects proper fluid once or for many times to ensure that the expansion area at the front end of the secondary hose [5] is properly expanded, then the fluid valve [4] is closed or the pressure regulating cavity [16] is always kept at proper pressure, and the injection of the fluid into the secondary hose [5] can be completed step by step once or for many times; and then the hose is drawn back and forth to finish the dredging work. At this time, the main hose [3] and the secondary hose [5] can respectively use independent pressure regulating cavities [16] without mutual influence, and can also use a common pressure regulating cavity [16] to switch respective fluid valves [4] or adjust the pressure of the pressure regulating cavities [16] timely. The pressure regulating cavity (16) can be bound by elastic material (preferably adjustable by elasticity) or controlled to keep corresponding pressure, or can be connected with corresponding fluid devices to ensure that the pressure regulating cavity (16) can keep proper pressure, or the pressure regulating cavity (16) can be directly pressurized by external force to ensure that the pressure regulating cavity (16) can keep proper pressure or the pressure is exerted at the moment when the fluid valve (4) is opened to adjust the pressure in the hose.

The fluid valve [4] and the valve [18] in the embodiment can be opened or closed at proper time according to the specific dredging work progress condition; and may be retained or omitted depending on the particular conditions of use and environment.

In the embodiment shown in fig. 6, the chain ring [7] is arranged in the variable expansion area of the secondary hose [5] end to end, and the edge angle of the chain ring [7] is preferably sharp or abrupt (i.e. the corner between the outer peripheral surface of the chain ring [7] and the front and rear end surfaces is preferably sharp and has no radian), so that the chain ring [7] can better scrape the adhered dirt accumulated in the drain pipe. The chain ring [7] can be longitudinally arranged in the expansion area of the secondary hose [5], or transversely arranged in the expansion area of the secondary hose [5], also can be arranged in the expansion area of the secondary hose [5] in a criss-cross mode, and also can be spirally arranged in the expansion area of the secondary hose [5 ]. The longitudinally arranged chain ring [7] can be wholly or partially fixed in the expansion area of the secondary hose [5 ]; the chain ring [7] which is transversely installed or spirally installed is preferably locally fixed in an expansion area of the secondary hose [5] and an expansion space is reserved, namely the length of the chain ring [7] which is transversely installed or spirally installed and is reserved between two fixed points when the chain ring [7] is locally fixed is not smaller than the distance between the two fixed points after the expansion area of the secondary hose [5] is expanded. When the chain ring [7] is longitudinally installed, the middle part of the chain ring [7] with double length can be wound around the front end of the expansion area of the secondary hose [5] and fixed, and then two ends of the chain ring are fixed at the rear end of the expansion area of the secondary hose [5], or an independent chain ring with a section smaller than that of the expansion area of the secondary hose [5] can be stably installed at the front end of the expansion area of the secondary hose [5] (namely the independent chain ring can only be arranged at the front end of the expansion area of the secondary hose [5] and can not slide to the expansion area of the secondary hose [5 ]), one end of the chain ring [7] with proper length is connected with the independent chain ring, and the other end of the chain ring is fixed at the rear. When the chain ring [7] is transversely installed or spirally installed, a longitudinal stable structure is preferably added between the front and rear chain rings [7] and the front and rear ends of the expansion area of the secondary hose [5] to prevent the chain ring [7] from sliding, shifting or falling off when being drawn back and forth; the longitudinal stabilizing structure may be a load-bearing wire, rope, chain loop, or other suitable material or member.

In the embodiment, a wear-resistant flexible material is preferably added between the scraping blade [1] or the chain ring [7] and the expansion area of the secondary hose [5], so that the service life of the dredging rod or the dredging hose is prolonged.

With reference to fig. 4, on the basis of the foregoing embodiment, a rigid expansion region [15] which is larger than other parts and is larger than other parts is directly processed on the cross section of the front end or the end part of the coil spring [6], and the edge angle of the periphery of the expansion region [15] is preferably sharp or interrupted (that is, the corners of the peripheral surface of a scraper of the coil spring and the front and rear side surfaces, that is, the front and rear end surfaces, are preferably sharp and have no curvature), so that the coil spring of the expansion region [15] can better scrape the adhered dirt in the drain pipe, and the thickness and the width of the coil spring of the expansion region [15] can be properly widened, so that the coil spring of the expansion region [15] can better scrape the dirt and can also keep better structural stability.

Referring to fig. 5, on the basis of the previous embodiment, the cross section of the front or end part of the two ends of the coil spring [6] is processed into expanding areas [15] with different sizes, so that the sewage can be dredged by grades or step by using the expanding areas [15] with different sizes.

With reference to fig. 12, on the basis of the previous embodiment, the expansion area is provided with a body [20], a protruding scraping ring or scraping blade [21] is arranged on the body [20], so that the periphery of the expansion area is in an irregular round or uneven curved surface, and dirt accumulated and adhered in the drain pipe can be scraped in the twitching process.

Referring to fig. 13, on the basis of the above embodiment, the expansion area is arranged as a plurality of arcs or rings [23] with non-coincident circle centers and clear peripheral edges are arranged between the front and rear rings [22] with coincident circle centers, so that the periphery of the expansion area is integrally formed into an irregular round or uneven curved surface, which is beneficial to scraping the dirt accumulated and adhered in the drain pipe during pumping.

With reference to fig. 14, on the basis of the above embodiment, a pressure limiting valve [24] is arranged between the expansion area and the dredging rod main body, so that a certain pressure difference always exists between the expansion area and the dredging rod main body, and the dredging rod is conveniently pressurized in stages to gradually dredge. At the moment, one of the main hose [3] or the secondary hose [5] can be omitted, so that the structure of the dredging rod is simpler.

With reference to fig. 15, on the basis of the above embodiment, an elastic pressure-limiting sleeve [25] is arranged on the variable expansion area, so that the expansion areas have different expansion degrees under different pressures, and the dredging rod can be conveniently and gradually pressurized to dredge. At the moment, the pressure-limiting sleeve [25] can be an elastic net with stable mechanical property, and also can be a flexible elastic ring or bag with stable mechanical property. When the mechanical property of the pressure limiting sleeve [25] is stable and reliable, the pressure limiting valve [24] can be omitted.

Example 2

With reference to fig. 7, on the basis of embodiment 1, a curved guide rod [9] capable of freely rotating in the radial direction is added at the front end of the dredging rod or dredging hose, and the dredging rod or dredging hose is guided by the guide rod [9] to move in a curve of a drain pipe, so that the smoothness of the dredging rod or dredging hose in the drain pipe is improved. The guide rod (9) can be stably connected with the end part of the dredging rod or the dredging hose through an expansion area at the end part of the guide rod (9), a combined clamping sleeve (10) with a hole in the middle part not smaller than the cross section of the guide rod (9) and an annular space in the expansion area not smaller than the annular space of the expansion area is sleeved outside the expansion area, so that the guide rod (9) can freely rotate in the combined clamping sleeve (10). In order to ensure that the front end of the guide rod [9] can timely or effectively rotate downwards at any time, particularly when the guide rod moves horizontally, a counterweight member [8] can be arranged at the front end of the guide rod [9], the counterweight member [8] can be fixedly arranged at the front end of the guide rod [9] and can also be clamped at the front end of the guide rod [9] through a clamping sleeve (in a rotatable mode), so that the guide rod [9] can better complete rotation guide work under the action of the counterweight member [8 ].

In the embodiment, the front end of the dredging rod or the dredging hose can be directly processed into a curved shape; or a bent component is arranged at the front end of the dredging rod or the dredging hose, so that the front end of the dredging rod or the dredging hose keeps a bent state, and the guide work is finished by the bent part at the front end of the dredging rod or the dredging hose.

Example 3

With reference to fig. 8 and 9, on the basis of the above embodiment, in order to improve the dredging function, performance and length of the dredging rod or the dredging hose, two dredging rods or dredging hoses can be connected in series to increase the dredging distance, the expansion region of the secondary hose [5], the scraper [1] and the front end of the protective layer or the coil spring [6] close to the front end or the expansion region [15] close to the end can be processed into independent expansion scrapers, the dredging rod or the dredging hose is divided into independent expansion scrapers and a soft pushing rod (i.e., a soft rod for pushing the expansion scrapers to move back and forth), and the expansion scrapers are preferably processed into a plurality of expansion scrapers with different sizes, so that the expansion scrapers with proper sizes can be selected according to actual requirements during dredging operation. When the expanding scraper and the pushing soft rod are connected, more than one radial groove [12] (the number of the grooves [12] is more than one) shown in figure 8 can be processed at the interface of one part [11] of the expanding scraper and the pushing soft rod, the radial convex edges [13] shown in figure 9 are processed at the interface of the other part [14] of the expanding scraper and the pushing soft rod, the number of the convex edges [13] corresponds to that of the grooves [12], and the convex edges [13] can be matched with the grooves [12], when in connection, the convex edges [13] are embedded in the grooves [12], and the interfaces are locked by using screw ports, bayonets or movable connection modes to form a connection mechanism or a structure with limited mutual bidirectional rotation between the soft rod and the expanding dredging head or between the soft rod and the soft rod, so that the coaxial reverse rotation or the coaxial same-direction but different-speed rotation of the interfaces of the two parts is prevented, and the two parts are prevented from loosening or slipping due to different stresses when in rotation or twitching in the dredging work. The two parts can be connected by a screw and a nut, various connecting bayonets, loose joints and other suitable connecting modes.

With reference to fig. 10 and 11, in this embodiment, an axial groove [12] (more than one groove [12 ]) shown in fig. 11 may be formed in the inner wall (or outer wall) of the interface of one part [11] of the expanding scraper and the soft pushing rod, an axial rib [13] (the number of the rib [13] is corresponding to the groove [12], and the size of the rib can be matched with that of the groove [12 ]) shown in fig. 10 is formed in the outer wall (or inner wall) of the interface of the other part [14] of the expanding scraper and the soft pushing rod, and the rib [13] is inserted into the groove [12] to be locked during connection, and then the two interfaces are locked and connected by using a screw port, a bayonet or a movable connection manner.

In the embodiment, pin grooves or grooves [12] can be processed in both the expanding scraper and the pushing soft rod, the pin grooves or grooves [12] of the two parts are aligned when in connection, convex edges, pin rods or pin clamps with proper sizes are arranged between the two pin grooves or grooves [12] and clamped in the two pin grooves or grooves [12], and then the two parts are locked and connected by using screw ports, bayonets or movable connection modes.

In this embodiment, the outer wall of one of the two parts of the expanding scraper and the pushing soft rod and the inner wall of one of the two parts can be directly processed into a connecting mechanism with a polygonal rod and a hole in the cross section which are mutually closely contacted or embedded, so that the connecting ports are connected through the connecting mechanism with edges and corners, and the two parts of the interface are prevented from rotating relatively. The outer wall of one of the two parts of the expanding scraper and the pushing soft rod and the inner wall of the other part can be directly processed into round rods or round rods with irregular cross sections and irregular round holes which are mutually closely contacted or inlaid as connecting mechanisms, so that the connecting ports are connected through the round connecting mechanisms with edges and corners or irregular cross sections, and the two parts of the connector are prevented from rotating relatively. The irregular round connecting mechanism can be a square plane with at least one defect on the outer wall and the inner wall, or at least one corner is added on the outer wall and the inner wall of the round connecting mechanism, or at least one square plane is added on the outer wall and the inner wall of the round connecting mechanism; the irregular circular connecting mechanism can also be irregular oval, semi-circle, circular arc and other structures or shapes.

In this embodiment, other suitable connection means can be provided between the two members to prevent the interfaces of the two members, i.e., the expanding scraper and the pushing soft rod, from rotating coaxially in the opposite direction or coaxially in the same direction but at different speeds.

In this embodiment, the flexible pipe or the flexible rod can be formed by splicing segmented or sectioned rigid materials at the periphery, and the flexible interface, the movable interface or the movable bayonet is used for connecting the segmented or sectioned rigid pipes, rods or rods into a connected flexible pipe, rod or rod; other suitable methods may also be used to manufacture or manufacture the wand or hose.

Further, each structure or fitting and the like of the present embodiment may be processed alone, or may be provided or processed together with the corresponding structure or fitting and the like as a combined fitting; and adjacent structures or components can be processed together to form a combined accessory, so that construction and installation are facilitated.

Furthermore, the expanding dredging head with the scraper can be directly replaced by a flexible pipe with the scraper, the flexible pipe is slightly larger but smaller than the pipeline, the scraper can scrape the inner wall of the pipeline on the flexible pipe, the head part of the flexible pipe, namely the front end of the flexible pipe, is slightly larger, or the flexible pipe at the front end is provided with elasticity and filled with a proper amount of fluid, so that the scraper can generate a scraping effect better, and the flexible pipe can be replaced by a flexible rod.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pipeline dredging rod with a scraper is characterized by comprising a soft rod and a dredging head;

the soft rod comprises a soft rod and a hose;

the dredging head is arranged at the front end of the dredging rod;

and a scraper is arranged on the periphery of the dredging head.

2. The pipe clearing bar with scraper of claim 1, wherein said soft bar comprises a bendable pipe, a bendable rod or bar;

the bendable pipeline comprises a flexible pipeline capable of being bent in the radial direction, and a conjoined pipeline which is a section or a subsection capable of being bent in the radial direction and is divided into rigidity;

the bendable rods or bars include radially bendable flexible rods or bars, radially bendable segments or segments, or rigid integral rods or bars.

3. The pipe dredging rod with scraper as claimed in claim 1, wherein the dredging head comprises an enlarged area with a larger periphery than the dredging rod main body, the enlarged area is provided with scraper, and the scraper comprises a scraping mechanism or structure with sharp angle, a scraping ring mechanism or structure.

4. The pipe dredging bar with scraper as claimed in claim 3, wherein the swelling area of the dredging head is variable in size.

5. The pipe dredging rod with the scraper is characterized in that the dredging head is an arc-shaped scraping ring or a scraping blade which is provided with a convex interval at an expansion area; or a plurality of circular arcs or circular rings with non-coincident centers and clear peripheral edges and corners are arranged in the expansion area; or a chain ring with clear edge angles on the periphery.

6. The pipe dredging rod with the scraper as claimed in claim 3, wherein a pressure limiting valve is provided between the expansion area and the dredging rod main body; or the elastic pressure-limiting sleeve with stable and reliable mechanical property is arranged on the variable expansion area.

7. The pipe dredging rod with the scraper as claimed in claim 3, wherein more than two expanding dredging heads with scrapers with different outer diameters are provided.

8. The pipe dredging bar with scraper of claim 2, wherein the fluid pressure regulating device is arranged on the sealed flexible pipe.

9. The pipe dredging rod with scraper as claimed in any one of claims 1, 2 or 3, wherein a connection mechanism or structure with limited mutual rotation in two directions is provided between the soft rod and the enlarged dredging head or between the soft rod and the soft rod.

10. The pipe dredging bar with scraper as claimed in claim 1, wherein a curved guide bar capable of freely rotating in radial direction is provided at the front end of the enlarged dredging head.