A pipe cleaner with a scraper

Abstract

The application discloses a pipe dredging rod with a scraper, and aims at solving the problem of complicated use of traditional pipe dredging tools, and discloses the pipe dredging rod with the scraper, which comprises a hose, a soft rod and a dredging head, and the swollen dredging head is a mechanism or structure provided with the scraper in the swollen area. The pipe dredging rod with the scraper makes the pipe dredging, especially the operation of the sewer dredging, simple and convenient, and does not need professional personnel to operate, and is more popular and universal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of preventing and dredging sewer, in particular to a pipe dredging tool with scraper for dredging sewer or pipe. BACKGROUND

[0002] For many years, the problem of pipe blockage caused by oil and fat accumulation in the sewer pipe of the kitchen in the resident's home has been a difficult problem in people's daily life, especially the environmental sanitation problem caused by the blockage of the water pipe, which is very disturbing. Although there are many kinds of water pipe dredging machines today, the good ones are complex in structure and need to be operated by professional technicians, and the simple ones are difficult to effectively dredge the blocked pipe. Therefore, people are looking forward to a simple and effective dredging tool that can quickly dredge the blocked sewer pipe. SUMMARY

[0003] In order to solve the problem of complex use of traditional pipe dredging tools, the present application provides a pipe dredging rod with scraper, which comprises a soft rod and an enlarged dredging head. The enlarged dredging head is a mechanism or structure with scraper arranged in the enlarged area.

[0004] The pipe dredging rod with scraper is mainly composed of a soft rod. The soft rod is a flexible pipe, a flexible rod, or a flexible rod. The flexible pipe can be radially bent, or it can be segmented or segmented into a rigid connected pipe. The flexible rod or rod can be radially bent, or it can be segmented or segmented into a rigid connected rod.

[0005] The pipe dredging rod with scraper comprises a soft rod and a dredging head for removing accumulated dirt in the pipe. The soft rod is divided into a soft rod or a flexible pipe. The enlarged dredging head is arranged at the outer periphery of the end of the dredging rod, which is larger than the main body of the dredging rod. The enlarged dredging head is provided with sharp-edged scrapers, which include scrapers or scrapers. The scrapers are arranged transversely, obliquely or longitudinally on the periphery of the dredging head, so that the drain dirt scraped off can flow away with the water flow.

[0006] Preferably, the soft rod comprises a flexible pipe, a flexible rod or a flexible rod. The flexible pipe comprises a flexible pipe that can be radially bent, or it can be segmented or segmented into a rigid connected pipe. The flexible rod or rod comprises a telescopic spring, or a flexible rod or a flexible rod that can be radially bent, or a rigid connected rod that can be radially bent.

[0007] Preferably, the size of the enlarged area of the enlarged dredging head with scraper can be changed, or two or more enlarged dredging heads with scraper having different outer diameters are provided.

[0008] Preferably, the expandable dredging head with scraper comprises an arc-shaped scraper ring or scraper sheet protruding at intervals in the expandable area; or a plurality of arcs or rings with different centers and sharp edges in the expandable area; or a chain ring with sharp edges; or an irregularly shaped or uneven curved surface.

[0009] Preferably, a pressure limiting valve is arranged between the expandable area and the dredging rod body; or an elastic pressure limiting sleeve with stable and reliable mechanical properties is arranged on the variable expandable area.

[0010] Preferably, a stable structure with certain bearing capacity is arranged between the scrapers to prevent the scrapers from sliding, shifting or falling off when being pulled out.

[0011] Preferably, a fluid pressure regulating device is arranged on the sealed hose pipeline.

[0012] Preferably, a bidirectional mutual rotation limiting connecting mechanism or structure is arranged between the soft rod and the expandable dredging head, or between the soft rods.

[0013] Preferably, elastic members or elements are arranged between the outer periphery of the variable expandable area at the front end of the secondary hose or the transverse scrapers.

[0014] Preferably, a curved guide rod capable of freely rotating radially is arranged at the front end of the expandable dredging head.

[0015] The beneficial effects of the present application are that the dredging of pipelines, especially the dredging of sewers, becomes simple and convenient, and does not require professional personnel to operate, which is more popular and widespread. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0018] Figure 2 is a structural schematic diagram of embodiment 1 of the present application;

[0019] Figure 3 is a structural schematic diagram of embodiment 1 of the present application;

[0020] Figure 4 is a structural schematic diagram of embodiment 1 of the present application;

[0021] Figure 5 is a structural schematic diagram of embodiment 1 of the present application;

[0022] Figure 6 is a structure schematic diagram of the expansion area of the embodiment 1 of the present application;

[0023] Figure 7 is a structure schematic diagram of the guide rod of the embodiment 2 of the present application;

[0024] Figure 8 is a structure schematic diagram of the interface of the embodiment 3 of the present application;

[0025] Figure 9 is a structure schematic diagram of the interface of the embodiment 3 of the present application;

[0026] Figure 10 is a structure schematic diagram of the interface of the embodiment 3 of the present application;

[0027] Figure 11 is a structure schematic diagram of the interface of the embodiment 3 of the present application;

[0028] Figure 12 is a sectional schematic diagram of the expansion dredging head of the embodiment 1 of the present application;

[0029] Figure 13 is a sectional schematic diagram of the expansion dredging head of the embodiment 1 of the present application;

[0030] Figure 14 is a structure schematic diagram of the embodiment 1 of the present application;

[0031] Figure 15 is a structure schematic diagram of the embodiment 1 of the present application. DETAILED DESCRIPTION

[0032] In order for those skilled in the art to 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] Embodiment 1: in combination with Figure 1, it is to set the secondary hose [5] in the main hose [3] (ie pipe main body), the length of the secondary hose [5] is greater than the main hose [3], in the secondary hose [5] stretch out the front end of the main hose [3] processing multiple folds [2] for variable expansion area

[26] , so that the secondary hose [5] front end part under the action of pressure can expand increase cross section or with the sewer pipe wall contact, in the secondary hose [5] front variable expansion area

[26] set scraper [1], the scraper [1] is preferably installed in the secondary hose [5] with before and after and left and right multiple piece interval type transverse or oblique, and the edge of the scraper [1] outer periphery is preferably sharp or abrupt (ie the outer peripheral surface of the scraper with the front and back two side, that is, the front and back end face corner is preferably sharp, that is, the edge is clear without arc) to facilitate the scraper [1] can better scrape the accumulated dirt in the drain pipe, in the secondary hose [5] front variable expansion area

[26] or the scraper [1] transverse interval set elastic member or element, so that the secondary hose [5] front variable expansion area

[26] is always in the shrinkage state without pressure, facilitate the main hose [3] smoothly into the sewer, in the main hose [3] and the secondary hose [5] end or appropriate position set fluid valve [4], fluid valve [4] can also be set in the main hose [3] and the secondary hose [5] communication connecting pipe, convenient to inject into the hose suitable pressure fluid (liquid or gas).

[0034] In this embodiment, the main hose [3] can be an independent hollow circular ring sealing long tube, or the main hose [3] and the secondary hose [5] can be processed into a combined main and secondary hose, that is, the intermediate part of the secondary hose or the pipe wall outside the fold [2] area is the inner wall of the main hose and is sealed connected with the main hose.

[0035] In the process of dredging the sewer, first fill the main hose [3] with appropriate amount of fluid through the fluid valve [4] of the main hose [3] to make the main hose [3] straight, then stretch the front end of the main hose [3] into the blockage of the sewer, which can be directly pulled back and forth with the main hose [3] to appropriately dredge the sewer, when the sewer is appropriately dredged by the main hose [3], then fill the secondary hose [5] with appropriate amount of fluid through the fluid valve [4] of the secondary hose [5] to make the front end of the secondary hose [5] appropriately expand and its cross section larger than that of the main hose [3], then pull the hose back and forth, which can scrape the dirt in the drain pipe with the scraper [1] and flow into the drainage system with the water flow. In the process of dredging the sewer, when the front end of the main hose [3] is stretched into the blockage of the sewer, the secondary hose [5] can be directly filled with appropriate amount of fluid to make the front end of the secondary hose [5] appropriately expand and its cross section larger than that of the main hose [3], then pull the hose, which can directly scrape the dirt with the scraper [1] and flow into the drainage system with the water flow, reducing the friction between the main hose [3] and the drain pipe or the dirt.

[0036] In this embodiment, when injecting fluid into the secondary hose [5], the front end of the hose [5] can be gradually inflated in multiple times, and the sewer can be gradually dredged by pulling the hose back and forth after each injection, thereby reducing the difficulty of dredging and improving the dredging effect.

[0037] In this embodiment, the main hose [3] can be replaced by a hollow hose or soft rod that can bend radially and deform axially slightly under external force. Similarly, a hollow hose or soft rod with one end connected to an expansion area that can expand under internal pressure and has a scraping blade [1] on the outer periphery, and one end connected to a fluid valve [4] can be used instead of the secondary hose [5].

[0038] In combination Figure 2 In this embodiment, the main hose [3] can also be directly replaced by a coil spring [6] as the hose, soft material or soft rod body. In this case, the expansion area of the secondary hose [5] can be installed in the space at the front end of the coil spring [6], and the scraping blade [1] can be installed in the gap between the two coils of the coil spring [6]. In this case, the outer periphery of the front end of the coil spring [6] and the corner between the front and back sides of the coil should be sharp or abrupt, which is beneficial to the coil spring [6] to directly scrape the dirt in the drain pipe. The expansion area of the secondary hose [5] can also be extended 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.

[0039] In combination Figure 3, it is based on the foregoing embodiment, in the hose fluid valve [4] outside reconnection a pressure regulating chamber

[16] , pressure regulating chamber

[16] can be connected with the hose through the connecting pipe

[17] , fluid valve [4] is installed on the connecting pipe

[17] , valve

[18] is installed on the pressure regulating chamber

[16] for injection fluid, pressure regulating chamber

[16] can be provided with connecting pipe

[19] and the outside or fluid device communication, at this time the valve

[18] can be installed on the connecting pipe

[19] . Before dredging the sewer, the appropriate amount of fluid should be injected into the pressure regulating chamber

[16] and then the valve

[18] is closed or connected with a suitable fluid device. When dredging the sewer, first open the fluid valve [4] of the main hose [3], then compress or pressurize the pressure regulating chamber

[16] to make the main hose [3] inject the appropriate amount of fluid to straighten, then close the fluid valve [4] or make the pressure regulating chamber

[16] always maintain the appropriate pressure, so that the main hose [3] has the length that can remain basically unchanged or basically not be compressed when it is pulled back and forth in the drain pipe; Then open the fluid valve [4] of the secondary hose [5] in time, then compress or pressurize the pressure regulating chamber

[16] to make the secondary hose [5] inject the appropriate amount of fluid one or more times to make the expansion zone at the front end of the secondary hose [5] expand appropriately, then close the fluid valve [4] or make the pressure regulating chamber

[16] always maintain the appropriate pressure, and the injection of fluid into the secondary hose [5] can be completed one time or in multiple steps; Then pull the hose back and forth to complete the dredging work. At this time, the main hose [3] and the secondary hose [5] can use independent pressure regulating chambers

[16] without affecting each other, or they can use a common pressure regulating chamber

[16] and open or close their respective fluid valves [4] or adjust the pressure of the pressure regulating chamber

[16] in time. The pressure regulating chamber

[16] can be bound or controlled by elastic material (preferably with adjustable elastic force) to maintain the corresponding pressure, or it can be connected to the corresponding fluid device to maintain the appropriate pressure of the pressure regulating chamber

[16] , or it can be directly pressurized by external force to maintain the appropriate pressure of the pressure regulating chamber

[16] or to adjust the pressure in the hose at the moment when the fluid valve [4] is opened.

[0040] The fluid valve [4] and the valve

[18] in the present embodiment can be opened or closed in time according to the specific progress of the dredging work; They can also be reserved or omitted according to the specific use conditions and environment.

[0041] In combination Figure 6, it is on the basis of the foregoing embodiments, with the end-to-end chain ring [7] installed in the variable expansion zone of the secondary hose [5], the corners of the chain ring [7] are preferably sharp or abrupt (i.e. the outer peripheral surface of the chain ring [7] and the corner of the front and rear end surfaces are preferably sharp and arc-free), which helps the chain ring [7] to better scrape the accumulated and adhered dirt in the drain pipe. The chain ring [7] can be installed longitudinally in the expansion zone of the secondary hose [5], or transversely in the expansion zone of the secondary hose [5], or can be installed in the expansion zone of the secondary hose [5] in a longitudinal and transverse staggered manner, or can be installed in the expansion zone of the secondary hose [5] in a spiral manner. The longitudinally installed chain ring [7] can be fixed as a whole or partially in the expansion zone of the secondary hose [5]; the transversely installed or spirally installed chain ring [7] is preferably partially fixed in the expansion zone of the secondary hose [5] and should reserve an expansion space, i.e. the length of the chain ring [7] between the two fixed points should not be less than the distance between the two fixed points after the expansion of the expansion zone of the secondary hose [5]. When the chain ring [7] is installed longitudinally, the middle part of the chain ring [7] with a length twice that of the chain ring [7] can be wrapped around the front end of the expansion zone of the secondary hose [5] and fixed, and then the two ends can be fixed at the rear end of the expansion zone of the secondary hose [5], or a separate chain ring with a smaller cross section than the expansion zone of the secondary hose [5] can be stably installed at the front end of the expansion zone of the secondary hose [5] (i.e. the separate chain ring can only be installed at the front end of the expansion zone of the secondary hose [5] and cannot slide to the expansion zone of the secondary hose [5]), and one end of the chain ring [7] with a suitable length is connected to the separate chain ring and the other end is fixed at the rear end of the expansion zone of the secondary hose [5]. When the chain ring [7] is transversely installed or spirally installed, a longitudinal stabilizing structure is preferably added between the front and rear chain rings [7] and the front and rear ends of the expansion zone of the secondary hose [5] to prevent the chain ring [7] from sliding, shifting or falling when it is pulled forward and backward; the longitudinal stabilizing structure can be a wire, a string, a chain ring or other suitable material or component with a certain bearing capacity.

[0042] In this embodiment, a wear-resistant flexible material is preferably added between the scraper [1] or the chain ring [7] and the expansion zone of the secondary hose [5] to improve the service life of the drain rod or the drain hose.

[0043] In combination with Figure 4 , it is on the basis of the foregoing embodiments, directly processing the front end of the coil spring [6] to have a larger cross section than the other parts as the rigid expansion zone

[15] of the drain rod, at which time the corners of the outer periphery of the expansion zone

[15] are preferably sharp or abrupt (i.e. the outer peripheral surface of the coil spring scraper and the corner of the front and rear sides, i.e. the front and rear end surfaces, are preferably sharp and arc-free), which helps the coil spring of the expansion zone

[15] to better scrape the accumulated and adhered dirt in the drain pipe, at which time the thickness of the coil spring of the expansion zone

[15] is preferably thin and the width can be appropriately widened, so that the coil spring of the expansion zone

[15] can better scrape the dirt and also maintain good structural stability.

[0044] In combination with Figure 5, it is on the basis of the foregoing embodiment, the two ends of the coil spring [6] rely on the front or rely on the end of the cross-section of the head part into different size of the swelling area

[15] , easy to use different size of the swelling area

[15] to the sewer classification or step by step to carry out dredging work.

[0045] In combination with Figure 12 , it is on the basis of the foregoing embodiment, the swelling area is provided with a body

[20] , the protruding scraper ring or blade

[21] is arranged on the body

[20] , the outer periphery of the swelling area is irregularly circular or uneven curved surface, which is beneficial to scrape the accumulated and adhered dirt in the drain pipe during the pulling.

[0046] In combination with Figure 13 , it is on the basis of the foregoing embodiment, the swelling area is provided with a plurality of circular arcs or circular rings

[23] with non-coincident centers and clear edges on the outer periphery between the front and rear circular rings

[22] with coincident centers, so that the outer periphery of the swelling area is irregularly circular or uneven curved surface, which is beneficial to scrape the accumulated and adhered dirt in the drain pipe during the pulling.

[0047] In combination with Figure 14 , it is on the basis of the foregoing embodiment, the swelling area and the dredging rod body are provided with a pressure limiting valve

[24] , so that there is always a certain pressure difference between the swelling area and the dredging rod body, which is beneficial to the step-by-step dredging work of the dredging rod by grading pressure. At this time, one of the main hose [3] or the secondary hose [5] can be omitted, so that the structure of the dredging rod is simpler.

[0048] In combination with Figure 15 , it is on the basis of the foregoing embodiment, the elastic pressure limiting sleeve

[25] is arranged on the variable swelling area, so that the swelling degree of the swelling area is different under different pressure, which is beneficial to the step-by-step dredging work of the dredging rod by grading pressure. At this time, the pressure limiting sleeve

[25] can be a flexible elastic net with stable mechanical properties, or a flexible elastic ring or bag with stable mechanical properties. When the mechanical properties of the pressure limiting sleeve

[25] are stable and reliable, the pressure limiting valve

[24] can be omitted.

[0049] Embodiment 2: in combination with Figure 7, it is to add a curved guide rod [9] which can rotate freely in radial direction to the front end of the unclogging rod or unclogging hose based on the embodiment 1, and the unclogging rod or unclogging hose is guided by the guide rod [9] to move in the elbow of the drain pipe, so as to improve the smooth performance of the unclogging rod or unclogging hose in the drain pipe. The guide rod [9] can be stably connected with the end of the unclogging rod or unclogging hose through the enlarged area at the end of the guide rod [9], the combined sleeve

[10] with the hole in the middle which is not less than the cross section of the guide rod [9] and the inner space which is not less than the annular space of the enlarged area, so that the guide rod [9] can rotate freely in the combined sleeve

[10] . In order to make the front end of the guide rod [9] rotate downward timely, especially when moving horizontally, a counterweight [8] can be arranged at the front end of the guide rod [9], which can be fixedly installed at the front end of the guide rod [9], or can be clamped (in a rotatable manner) at the front end of the guide rod [9], so that the guide rod [9] can better complete the rotating guide work under the action of the counterweight [8].

[0050] In the embodiment, the front end of the unclogging rod or unclogging hose can also be directly processed into a curved shape; or a curved member is arranged at the front end of the unclogging rod or unclogging hose, so that the front end of the unclogging rod or unclogging hose remains in a curved state, and the guide work is completed by the curved part of the front end of the unclogging rod or unclogging hose.

[0051] Embodiment 3: combination Figure 8 , Figure 9 , based on the foregoing embodiments, in order to improve the unclogging function, performance and length of the unclogging rod or unclogging hose, two unclogging rods or unclogging hoses can be connected in series to increase the unclogging distance, or the expanded area of the secondary hose [5] and the scraper [1], the scraper [1], the scraper [1] and the front end of the protective layer or coil spring [6] can be processed into independent expanded scrapers, the unclogging rod or unclogging hose is divided into independent expanded scrapers and pushing rods (i.e. the pushing rod moves forward and backward), and the expanded scrapers are preferably processed into multiple expanded scrapers with different sizes, so that the unclogging work can select appropriate size of the expanded scraper according to actual needs. When connecting the expanded scraper and the pushing rod, a radial groove

[12] (more than one groove

[12] ) can be processed at the interface of one component

[11] of the expanded scraper and the pushing rod as shown in the figure, and a radial groove

[12] (more than one groove

[12] ) can be processed at the interface of the other component

[14] of the expanded scraper and the pushing rod as shown in the figure. Figure 8 Figure 9 ​The radial ridge

[13] (the number of the ridge

[13] corresponds to the groove

[12] , and the size can be matched with each other) is shown. When connected, the ridge

[13] is inlaid in the groove

[12] , and then the interface is locked by using the screw port, the bayonet or the movable connection mode. The connection mechanism or structure between the soft rod and the expanded dredging head or between the soft rods is formed, and the relative rotation of the two components is limited. The reverse rotation of the coaxial interface of the two components is prevented, and the same direction but different speed rotation is prevented. The loosening or slipping of the two components during dredging work due to different forces during rotation or twitching is prevented. The connection between the two components can be connected by using the screw and the nut, various connection bayonets, movable joints and other suitable connection modes.

[0052] In combination Figure 10 , Figure 11 In this embodiment, the axial groove

[12] (more than one groove

[12] ) is machined on the inner wall (or the outer wall) of the interface of one of the components

[11] of the expanded scraper and the pushing soft rod. Figure 11 The axial groove

[12] (more than one groove

[12] ) is shown. The outer wall (or the inner wall) of the interface of the other component

[14] of the expanded scraper and the pushing soft rod is machined. Figure 10 The axial ridge

[13] (the number of the ridge

[13] corresponds to the groove

[12] , and the size can be matched with each other) is shown. When connected, the ridge

[13] is inserted into the groove

[12] and locked, and then the two interfaces are locked and connected by using the screw port, the bayonet or the movable connection mode.

[0053] In this embodiment, the pin slot or the groove

[12] is machined in both of the components of the expanded scraper and the pushing soft rod. When connected, the pin slots or the grooves

[12] of the two components are aligned, and the ridge, the pin rod or the pin card with a suitable size is arranged between the two pin slots or the grooves

[12] and clamped in the two pin slots or the grooves

[12] . Then, the two interfaces are locked and connected by using the screw port, the bayonet or the movable connection mode.

[0054] In this embodiment, the outer wall of one of the two components of the expanded scraper and the pushing soft rod and the inner wall of the other component are machined into a polygonal rod and hole in close contact or inlay, so as to form a connection mechanism. The connection between the connection ports is through the angular connection mechanism, and the relative rotation of the two components of the interface is prevented. In addition, the outer wall of one of the two components of the expanded scraper and the pushing soft rod and the inner wall of the other component are machined into an irregular circular rod or a circular rod and an irregular circular hole in close contact or inlay, so as to form a connection mechanism. The connection between the connection ports is through the angular or irregular circular connection mechanism, and the relative rotation of the two components of the interface is prevented. The irregular circular connection mechanism can be at least one square plane on the outer wall and the inner wall, or at least one angle is added to the outer wall and the inner wall of the circular connection mechanism, or at least one square plane is added to the outer wall and the inner wall of the circular connection mechanism. The irregular circular connection mechanism can also be an irregular ellipse, a semicircle, a circular arc and the like.

[0055] In the present embodiment, other suitable connecting means can also be provided between the two components to prevent the interface between the expanded scraper and the pushing soft rod from rotating coaxially in opposite directions or rotating coaxially in the same direction but at different speeds.

[0056] In the present embodiment, the soft tube or soft rod can be spliced with segmented or segmented rigid materials, and the interface is connected with flexible interface, movable interface or movable bayonet to connect the segmented or segmented rigid pipes, rods or rods into a connected flexible pipe, rod or rod. Other suitable methods can also be used to process or manufacture the dredging rod or dredging hose.

[0057] Further, the structures or accessories of the present embodiment can be processed alone or together with the corresponding structures or accessories to form a combined accessory. Adjacent structures or components can also be processed together to form a combined accessory for convenient construction and installation.

[0058] Further, the expanded dredging head with scraper can be directly replaced with a scraper hose. In this case, the hose is slightly larger than the pipe but smaller than the pipe. The scraper on the hose can be in contact with the inner wall of the pipe for scraping. The head of the hose, i.e. the front end, can also be slightly larger, or the front end of the hose can be elastic and filled with an appropriate amount of fluid, so that the scraper can better produce scraping effect. In this case, the hose can also be replaced with a soft rod.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pipe de-clogging rod with a scraper, characterized in that, The pipe dredging rod comprises a soft rod, an enlarged dredging head, and is used for removing accumulated dirt in the pipe; The enlarged dredging head is arranged at the outer periphery of the end of the dredging rod and has a larger size than the main body of the dredging rod; a curved guide rod capable of rotating freely in the radial direction is arranged at the front end of the enlarged dredging head; The enlarged dredging head is provided with a scraper with sharp edges, and the scraper comprises a scraping piece or a scraping ring; The scraper is arranged transversely, obliquely or longitudinally at the outer periphery of the dredging head; the size of the enlarged area of the enlarged dredging head with the scraper is variable; the enlarged area is provided with a body, and a protruding scraping ring or scraping piece is arranged on the body, so that the outer periphery of the enlarged area is irregularly circular or unevenly curved; or the enlarged area is arranged as a plurality of circular arcs or circular rings with non-coincident centers and sharp edges at the outer periphery, so that the outer periphery of the enlarged area is irregularly circular or unevenly curved as a whole; which is beneficial to scraping the accumulated dirt in the drain pipe during dredging, so that the scraped dirt in the drain pipe flows away with the water flow.

2. A pipe cleaner with a scraper according to claim 1, characterized in that The soft rod comprises a bendable pipe or a bendable rod; The bendable pipe comprises a flexible pipe capable of bending in the radial direction, a rigid connected pipe segmented or sectioned in the radial direction; The bendable rod comprises a telescopic spring, a flexible rod capable of bending in the radial direction, or a rigid connected rod segmented or sectioned in the radial direction.

3. A pipe cleaning rod with a scraper according to claim 1, characterized in that, Two or more enlarged dredging heads with scrapers having different sizes are arranged.

4. A pipe cleaning rod with a scraper according to claim 1, characterized in that, The enlarged dredging head with the scraper comprises a chain ring with sharp edges at the outer periphery.

5. A pipe cleaning rod with a scraper according to claim 1, characterized in that, A pressure limiting valve is arranged between the enlarged area and the main body of the dredging rod; or an elastic pressure limiting sleeve with stable and reliable mechanical properties is arranged on the variable enlarged area.

6. A pipe de-clogging rod with a scraper according to claim 1 or 4, characterized in that, A stable structure with a certain bearing capacity is arranged between the scrapers to prevent the scrapers from sliding, shifting or falling off during dredging.

7. A pipe de-clogging rod with a scraper according to any one of claims 1 to 2, characterized in that, A connecting mechanism with limited bidirectional mutual rotation is arranged between the soft rod and the enlarged dredging head.

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