Auxiliary cleaning device for pipeline electrolytic derusting

Abstract

The invention discloses an auxiliary cleaning device for pipeline electrolytic rust removal. The auxiliary cleaning device comprises a motor, a traction assembly and a plurality of grinding mechanisms. The adjacent polishing mechanisms are connected through a universal hinge structure to form a polishing chain set, and the polishing chain set is suitable for conducting bending fit through the universal hinge structure at the pipeline bending position; the traction assembly penetrates through all the grinding mechanisms and is used for synchronously driving all the grinding mechanisms to be unfolded so as to make contact with the inner wall of the pipeline. The motor is suitable for driving the whole polishing chain set to rotate. The pipeline polishing device has the beneficial effects that the multiple polishing mechanisms are connected through the universal hinge structures, and it can be guaranteed that all the polishing mechanisms are driven by the motor to rotate to polish the interior of a pipeline; and part of the polishing mechanisms can be arranged in a relative inclined mode through a universal hinge structure so as to adapt to the bending position of the pipeline and keep the stability of motor transmission, and therefore it can be guaranteed that the auxiliary cleaning device can adapt to cleaning of pipelines of different shapes.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline rust removal, and in particular to an auxiliary cleaning device for electrolytic rust removal of pipelines. Background Art

[0002] For the use of metal pipes, especially in humid and rust-prone environments such as near rivers or seashores, it is often necessary to frequently remove rust from the pipes. The existing technology for treating metal pipes often uses electrolysis, that is, by placing the metal pipe in an electrolytic cell and connecting the metal pipe and the electrolyte to electricity to achieve electrolysis of the rust.

[0003] However, in actual use, especially the rust on the inner wall of the metal pipe, a large amount of sediment often adheres to the surface, which hinders the contact between the rust and the electrolyte, thereby greatly reducing the efficiency of electrolysis. Therefore, when removing rust from the inner wall of the metal pipe, it is often necessary to clean the inner wall of the metal pipe to remove the surface sediment. However, during the use of the metal pipe, its structure is not completely a straight pipe, and a large number of curved pipes are required, which makes the cleaning of the inner wall of the metal pipe, especially the curved pipe, complicated, and the prior art lacks a corresponding cleaning device. Summary of the invention

[0004] One of the purposes of the present application is to provide an auxiliary cleaning device for electrolytic rust removal of pipelines that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: an auxiliary cleaning device for electrolytic rust removal of pipelines, comprising a motor, a traction assembly and a plurality of grinding mechanisms; adjacent grinding mechanisms are connected by a universal hinge structure to form a grinding chain group, the grinding chain group is suitable for extending into the interior of the pipeline to be electrolyzed in a retracted state, and the grinding chain group is suitable for bending and matching at the bending position of the pipeline through the universal hinge structure; the traction assembly runs through all the grinding mechanisms, and the traction assembly is suitable for synchronously driving all the grinding mechanisms to unfold so that the grinding mechanisms contact the inner wall of the pipeline; the motor is fixedly installed and connected to one end of the grinding chain group through the output end, and the motor is suitable for driving the entire grinding chain group to rotate, thereby scraping the inner wall of the pipeline.

[0006] Preferably, the grinding mechanism includes a transmission sleeve and at least one grinding assembly, and adjacent grinding mechanisms are connected by forming a universal hinge structure through the transmission sleeve; multiple grinding assemblies are arranged at equal intervals along the outer circumferential direction of the transmission sleeve, and the driving end of the grinding assembly extends into the interior of the transmission sleeve and cooperates with the traction assembly; the grinding assembly is suitable for expanding or contracting along the radial direction of the transmission sleeve under the drive of the traction assembly.

[0007] Preferably, the grinding assembly includes a telescopic assembly and a scraper assembly; the telescopic assembly is installed on the transmission sleeve and extends into the transmission sleeve through the driving end to cooperate with the traction assembly, and the scraper assembly is installed on the connecting end of the telescopic assembly; the telescopic assembly is suitable for driving the scraper assembly to be in parallel contact with the inner wall of the pipe by rotation or translation under the drive of the traction assembly.

[0008] Preferably, the side of the transmission sleeve is provided with an axially extending through groove; the telescopic assembly includes a mounting plate, a traction plate and a hinge plate; the mounting plate is used to mount the scraper assembly, and the mounting plate is arranged along the axial direction parallel to the transmission sleeve; one end of the hinge plate is hinged to the mounting plate, and the other end is hinged to the side of the transmission sleeve; the traction plate is installed on the transmission sleeve and parallel to the hinge plate by rotating in the middle, one end of the traction plate is hinged to the mounting plate, and the other end extends through the through groove to extend to the inside of the transmission sleeve to form a driving end that cooperates with the traction assembly; the traction plate is suitable for rotating around the mounting position under the drive of the traction assembly along the axial movement of the transmission sleeve, thereby driving the mounting plate to drive the scraper assembly to maintain a posture parallel to the inner wall of the pipe to approach or move away.

[0009] Preferably, the grinding assemblies of adjacent grinding mechanisms are staggered along the circumferential direction of the transmission sleeve; and the scraper assemblies of adjacent grinding mechanisms partially overlap in length in the axial direction of the transmission sleeve.

[0010] Preferably, the scraper assembly includes a plurality of scrapers and a plurality of first elastic members; the plurality of scrapers are arranged along the axial direction of the transmission sleeve, and some or all of the scrapers are mounted on the telescopic assembly through the first elastic member, so that the scraper maintains contact with the inner wall of the pipe at the bending position of the pipe by driving the first elastic member to change its position to deform.

[0011] Preferably, among the multiple scrapers corresponding to the scraper assembly, the scraper located in the middle is fixedly arranged with the telescopic assembly; the first elastic member is a torsion spring, and the remaining scrapers are elastically rotatably installed with the telescopic assembly through the torsion spring; or, the first elastic member is a spring, and the remaining scrapers are elastically slidably installed with the telescopic assembly along the radial direction of the transmission sleeve through the spring.

[0012] Preferably, the traction assembly includes a plurality of pushing components, a traction rope and a driving component; the pushing components are correspondingly slidably installed in each of the transmission sleeves and are elastically contacted and matched with the corresponding telescopic components; the traction rope runs through the entire grinding mechanism and is connected to each of the pushing components, the driving component is threadedly matched with the other end of the grinding chain group away from the motor, and the driving component is connected to the traction rope, so that the spiral movement of the driving component drives the traction rope to pull the pushing component to slide axially along the transmission sleeve, thereby pushing each of the telescopic components to drive the scraper assembly to unfold.

[0013] Preferably, the pushing component includes a push plate, a second elastic member and a slide plate; the slide plate and the push plate are both slidably mounted on the transmission sleeve, the slide plate and the push plate are elastically connected via the second elastic member, the slide plate is connected to the traction rope, and the push plate cooperates with the driving end of each telescopic component.

[0014] Preferably, the pipe to be electrolyzed is directly placed in the electrolytic cell, the motor is located outside the electrolytic cell, and the output shaft of the motor is connected to the grinding chain group through a coupling made of insulating material; or, the auxiliary cleaning device also includes end covers sealingly installed at both ends of the grinding chain group, and the end covers are suitable for sealingly cooperating with both ends of the pipe to be electrolyzed, so that the internal space of the pipe to be electrolyzed forms an electrolytic cell, and the electrolyte is suitable for being injected into the interior of the pipe through the injection port provided on the end cover; at the same time, the wire of the metal electrode located in the pipe extends to the outside through the injection port.

[0015] Compared with the prior art, the beneficial effects of this application are: By connecting multiple grinding mechanisms through a universal hinge structure, it is possible to ensure that all the grinding mechanisms rotate and grind the inside of the pipe under the drive of the motor. At the same time, the universal hinge structure can be used to relatively tilt some of the grinding mechanisms to adapt to the bending position of the pipe and maintain the stability of the motor transmission, thereby ensuring that the auxiliary cleaning device of the present application can adapt to the cleaning of pipes of different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the coordination between this application and the curved pipe.

[0017] Figure 2 This is a schematic diagram of the structure of the present application in a bent state.

[0018] Figure 3 It is a schematic diagram of the matching structure of two adjacent grinding mechanisms in this application.

[0019] Figure 4 It is a schematic diagram of the structure of the transmission sleeve in this application.

[0020] Figure 5 This is a schematic diagram of the disassembled state of the scraper assembly and the telescopic assembly of one of the examples of the present application.

[0021] Figure 6 For this application Figure 5 The scraper assembly shown is a schematic diagram of the state of cooperation with the curved position of the pipe.

[0022] Figure 7 This is a schematic diagram of another example of the scraper assembly of the present application cooperating with the curved position of the pipe.

[0023] Figure 8 It is a schematic diagram of the local structure of the grinding component in the present application in a retracted state in the pipeline.

[0024] Fig. 9 It is a schematic diagram of the local structure of the grinding component in the present application in an expanded state in the pipeline.

[0025] Fig.10 It is a structural schematic diagram of another example of the driving component in the present application.

[0026] Fig.11 This is a schematic diagram of the local structure of the present application near the second end cover.

[0027] In the figure: pipeline 100, motor 2, grinding mechanism 3, transmission sleeve 31, groove 310, hinge seat 311, grinding assembly 32, telescopic assembly 321, mounting plate 3211, traction plate 3212, hinged plate 3213, scraper assembly 322, scraper 3221, first elastic member 3222, universal hinge block 33, first through hole 330, traction assembly 4, pushing component 41, slide plate 411, second elastic member 412, push plate 413, second through hole 4130, guide rod 4131, traction rope 42, driving component 43, handle 431, first end cover 51, second end cover 52, liquid injection port 520, metal electrode 61, wire 62, electrolyte 700. DETAILED DESCRIPTION

[0028] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0029] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0034] One of the preferred embodiments of the present application is as follows: Figure 1 and Figure 2 As shown, an auxiliary cleaning device for electrolytic rust removal of pipelines includes a motor 2, a traction assembly 4 and a plurality of grinding mechanisms 3. Adjacent grinding mechanisms 3 are connected by a universal hinge structure to form a grinding chain group, and each grinding mechanism 3 can be expanded or folded. When it is necessary to grind and remove impurities adhering to the inner wall of the pipeline 100 to be electrolyzed, all the grinding mechanisms 3 can be folded, and then the folded grinding chain group can be extended into the inside of the pipeline 100 to be electrolyzed; by folding the grinding mechanisms 3, it is convenient to extend the grinding chain group into and through the entire pipeline 100. When the pipeline 100 to be electrolyzed is bent, the grinding chain group can be bent and matched at the bending position of the pipeline 100 through the universal hinge structure. The traction assembly 4 runs through all the grinding mechanisms 3. After the grinding chain group is extended into the pipeline 100, the traction assembly 4 can be used to synchronously drive all the grinding mechanisms 3 to be expanded so that the grinding mechanisms 3 contact the inner wall of the pipeline 100. The motor 2 is fixedly installed and connected to one end of the grinding chain group through the output end. The motor 2 can drive the entire grinding chain group to rotate, and then scrape and grind the inner wall of the pipe 100, so as to remove impurities adhered to the inner wall of the pipe 100, so as to facilitate the rust on the inner wall of the pipe 100 to be more fully in contact with the electrolyte 700 to improve the electrolysis efficiency.

[0035] It is understandable that the specific number of grinding mechanisms 3 can be selected according to the length of the pipeline 100; for example, if the length of the pipeline 100 is 5 meters, if the length of each grinding mechanism 3 is 0.2 meters, then a grinding chain group formed by connecting 25 grinding mechanisms 3 is required to run through the entire length of the pipeline 100. Of course, the specific length of the grinding mechanism 3 can be set according to actual needs, and the grinding mechanisms 3 of the entire grinding chain group can be of equal length or unequal length. Specifically, if there is a bend in the pipeline 100, in order to ensure that the grinding chain group can smoothly and adaptively bend relatively at the bend of the pipeline 100, the length of the grinding mechanism 3 corresponding to the bend of the pipeline 100 needs to be selected to be relatively short, and a single common grinding mechanism 3 can be used for the straight pipe section of the pipeline 100. That is, for the entire grinding chain group, at least it is necessary to ensure that the length of the grinding mechanism 3 corresponding to the bend of the pipeline 100 is as short as possible while meeting the strength and installation space.

[0036] It should be known that, in order to facilitate the grinding chain group to quickly penetrate the pipe 100, the radial dimension of the grinding chain group along the pipe 100 when installed in the pipe 100 needs to be smaller than the inner diameter of the pipe 100; and the grinding chain group must come into contact with the inner wall of the pipe 100 to remove impurities adhering to the inner wall of the pipe 100 during the rotation process; therefore, the grinding mechanism 3 is set as a retractable structure in this embodiment, so that when the grinding chain group is inserted and installed, the grinding mechanism 3 can be in a retracted state, and after the grinding chain group is inserted, the grinding mechanism 3 can be expanded. In addition, the expanded size of the grinding mechanism 3 is a range value, so the grinding chain group of this embodiment can grind and clean the inside of various types of pipes 100 within a certain size range.

[0037] At the same time, since the grinding chain group cleans the inner wall of the pipe 100 by rotating around the axis of the pipe 100, and the grinding chain group needs to ensure normal rotation at the bending position of the pipe 100, and also needs to be able to bend adaptively, then the adjacent grinding mechanisms 3 can be connected through a universal hinge structure, that is, a universal coupling can be formed between the adjacent grinding mechanisms 3 through a universal hinge structure, so that the adjacent grinding mechanisms 3 can be relatively bent and still be able to transmit stably. The specific structure and working principle of the universal coupling are well known to those skilled in the art, so they will not be elaborated in detail here.

[0038] It should be noted that the relative bending angle of the universal coupling is generally in the range of 5°-45°. If the bending size of the corresponding pipe 100 is small, multiple grinding mechanisms 3 with shorter sizes can be selected to perform small angle bending in sequence to achieve it. For example, three universal couplings formed by four consecutive grinding mechanisms 3 can be bent at 30° in sequence to adapt to the 90° bend of the pipe 100. Of course, the bend of the pipe 100 can be an L-shaped bend, a Z-shaped bend, or even a U-shaped bend; for pipes 100 with different bending shapes, they can be adapted by grinding mechanisms 3 with corresponding numbers, sizes, and bending angles. The specific adaptability design is a conventional technology of those skilled in the art, so it will not be elaborated in detail here.

[0039] In this embodiment, there are many specific structures of the grinding mechanism 3 that can achieve the above functions. For the sake of easy understanding, the following will be described in detail using one of the structures. Figure 3 As shown, the grinding mechanism 3 includes a transmission sleeve 31 and at least one grinding assembly 32; the transmission sleeves 31 corresponding to adjacent grinding mechanisms 3 are connected by a cross-shaped universal hinge structure, and multiple grinding assemblies 32 are arranged at equal intervals along the outer circumferential direction of the transmission sleeve 31. The driving end of the grinding assembly 32 can extend into the interior of the transmission sleeve 31 and cooperate with the traction assembly 4, so that the grinding assembly 32 can be driven by the traction assembly 4 to expand or retract along the radial direction of the transmission sleeve 31.

[0040] It should be known that in order to ensure the support stability of the grinding chain group and the inner wall of the pipeline 100, the entire grinding chain group needs to evenly arrange multiple grinding components 32 in the circumferential direction; then for a single grinding mechanism 3, the number of grinding components 32 thereon is at least one. For each grinding mechanism 3, one grinding component 32 is set, and the grinding components 32 on multiple grinding mechanisms 3 need to be staggered in the circumferential direction; for each grinding mechanism 3, multiple grinding components 32 are set, and it is only necessary to ensure that the multiple grinding components 32 are arranged at equal intervals along the circumferential direction of the transmission sleeve 31; the interval between adjacent grinding components 32 can facilitate the falling of the sediment scraped off the inner wall of the pipeline 100. In order to ensure the cleaning effect of the grinding mechanism 3, in this embodiment, it is preferred that each grinding mechanism 3 uses multiple grinding components 32. For the connection between adjacent transmission sleeves 31, the opposite ends of the two transmission sleeves 31 can be hinged through a cross-shaped universal hinge block 33 to form a universal hinge structure.

[0041] It is understandable that there are many ways to unfold the grinding assembly 32, which can be achieved by rotating the grinding assembly 32 around the transmission sleeve 31, or by translating the grinding assembly 32 along the radial direction of the transmission sleeve 31. There are many specific structures of the grinding assembly 32 that can achieve the aforementioned unfolding methods, which will be described in detail below through specific examples.

[0042] Specifically, Figure 3 As shown, the grinding assembly 32 includes a telescopic assembly 321 and a scraper assembly 322; the telescopic assembly 321 is installed on the transmission sleeve 31 and extends into the transmission sleeve 31 through the driving end to cooperate with the traction assembly 4, and the scraper assembly 322 is installed on the connecting end of the telescopic assembly 321. The telescopic assembly 321 can drive the scraper assembly 322 to be parallel to the inner wall of the pipe 100 by rotation or translation under the drive of the traction assembly 4.

[0043] It is understandable that, in order to ensure the scraping and grinding effect of the grinding component 32 on the pipeline 100, the contact position of the grinding component 32 and the pipeline 100 is generally in a straight line, so that the grinding component 32 can scrape and grind the pipeline 100 with equal contact length during the rotation process. Therefore, when selecting the deployment method of the grinding component 32, it is only necessary to ensure that the grinding component 32 is finally in linear contact with the inner wall of the pipeline 100. For example, the scraper component 322 can be installed on the connecting end of the telescopic component 321 by elastic rotation installation, so that no matter how the telescopic component 321 moves, the scraper component 322 can be in a parallel posture by contacting the inner wall of the pipeline 100. For another example, the scraper component 322 can be installed on the connecting end of the telescopic component 321, and the telescopic component 321 only needs to ensure that the connecting end makes an equivalent linear motion in the radial direction of the transmission sleeve 31 when moving, so that the scraper component 322 can be in parallel contact with the inside of the pipeline 100. For the convenience of understanding, a specific example will be described in detail below.

[0044] Specifically, Figure 4 , Figure 5 , Figure 8 and Fig. 9As shown, the side of the transmission sleeve 31 is provided with an axially extending through groove 310, and the number of the through grooves 310 corresponds to the number and position of the grinding assembly 32; both ends of the through grooves 310 are provided with hinge seats 311 on the outside of the transmission sleeve 31. The telescopic assembly 321 includes a mounting plate 3211, a traction plate 3212 and a hinge plate 3213. The mounting plate 3211 is used to mount the scraper assembly 322, and the mounting plate 3211 is arranged along the axial direction parallel to the transmission sleeve 31. One end of the hinge plate 3213 is hinged to the first end of the mounting plate 3211, and the other end is hinged to the hinge seat 311 on the side of the transmission sleeve 31 located at the first end of the corresponding through groove 310. The traction plate 3212 is rotatably installed through the hinge seat 311 located at the second end of the corresponding through slot 310 in the middle and the side of the transmission sleeve 31, and the traction plate 3212 is parallel to the hinge plate 3213; one end of the traction plate 3212 is hinged to the second end of the mounting plate 3211, and the other end extends through the through slot 310 to extend to the inside of the transmission sleeve 31 to form a driving end that cooperates with the traction component 4.

[0045] It should be known that the mounting plate 3211, the hinge plate 3213, the traction plate 3212 and the transmission sleeve 31 can form a parallelogram structure, that is, Figure 8 and Fig. 9 As shown by the thick dotted line in the middle. Based on the characteristics of the parallelogram structure, the traction plate 3212 can rotate around the installation position under the axial movement of the traction component 4 along the transmission sleeve 31, thereby driving the installation plate 3211 to drive the scraper assembly 322 to approach or move away from the inner wall of the pipeline 100 in a parallel posture. That is, when the traction plate 3212 rotates around the middle installation position, the installation plate 3211 can maintain a movement parallel to the inner wall of the pipeline 100, thereby ensuring that the scraper assembly 322 can be in parallel contact with the inner wall of the pipeline 100.

[0046] It is understandable that, in order to ensure the effect of the scraper assembly 322 in cleaning the inner wall of the pipeline 100, the length of the scraper assembly 322 corresponding to the adjacent grinding mechanisms 3 in the axial direction of the transmission sleeve 31 needs to overlap partially. In this way, it can be ensured that the contact line between the scraper assembly 322 corresponding to all the grinding mechanisms 3 and the inner wall of the pipeline 100 is continuous and equal to the total length of the pipeline 100. In order to ensure that the scraper assembly 322 on the adjacent grinding mechanisms 3 can overlap in length in the axial direction, the grinding assemblies 32 of the adjacent grinding mechanisms 3 need to be staggered along the circumferential direction of the transmission sleeve 31, so as to avoid interference caused by the scraper assembly 322 on the adjacent grinding mechanisms 3 due to the overlapping length.

[0047] It should be known that, for the bending position of the pipe 100, when the adjacent grinding mechanisms 3 are adaptively bent, the scraper assemblies 322 corresponding to the adjacent grinding mechanisms 3 will move away from each other at the large diameter position of the bending of the pipe 100. At this time, the length overlapping parts of the scraper assemblies 322 on the adjacent grinding mechanisms 3 will compensate for the position change of the grinding mechanism 3 to ensure that the scraper assemblies 322 on the adjacent grinding mechanisms 3 are still continuous with the large diameter position of the bending of the pipe 100.

[0048] In this embodiment, there are multiple specific structures of the scraper assembly 322 that can clean the inner wall of the pipe 100 and adapt to the curved position of the pipe 100; for ease of understanding, one of the specific structures will be described in detail below. Figures 5 to 7 As shown, the scraper assembly 322 includes a plurality of scrapers 3221 and a plurality of first elastic members 3222; the plurality of scrapers 3221 are arranged along the axial direction of the transmission sleeve 31, and some or all of the scrapers 3221 are installed on the telescopic assembly 321 through the first elastic member 3222, so that the scraper 3221 maintains contact with the inner wall of the pipe 100 at the bending position of the pipe 100 by driving the first elastic member 3222 to change its position for deformation.

[0049] It is understandable that the specific number of scrapers 3221 can be selected according to the actual needs of those skilled in the art. The contact area between the scraper 3221 and the inner wall of the pipe 100 can be a straight line, but considering the curvature of the pipe 100, the contact area between the scraper 3221 and the inner wall of the pipe 100 can be designed to be an arc, and the specific arc can be selected according to the inner diameter range of the pipe 100 to be cleaned. In this way, whether it is a straight section or a curved section of the pipe 100, multiple scrapers 3221 can contact the pipe 100, and the contact points are spaced apart from each other, so that an equivalent straight line for cleaning can be formed between the multiple contact points. There are many specific installation methods for the scraper 3221 and the mounting plate 3211. For ease of understanding, two specific examples will be used for detailed description below.

[0050] Example 1: Figure 5 and Figure 6 As shown, there are three scrapers 3221, which are arranged in a row; the scraper 3221 in the middle can be fixedly connected to the mounting plate 3211 of the telescopic assembly 321, and the other two scrapers 3221 can be elastically rotated around the mounting plate 3211 through the first elastic member 3222, that is, the first elastic member 3222 is a torsion spring. When the scraper assembly 322 corresponds to the bending position of the pipeline 100, as shown in FIG. Figure 6As shown, the two scrapers 3221 on both sides can contact the inner wall of the curved position of the pipe 100 to rotate around the installation position and force the first elastic member 3222 to deform, so that the scrapers 3221 on both sides can ensure stable contact with the inner wall of the pipe 100 under the elastic force of the first elastic member 3222.

[0051] It should be noted that the rotational installation positions of the scrapers 3221 on both sides can be concentric or located on both sides of the installation position of the middle scraper 3221; the contact positions of the scrapers 3221 on both sides and the pipeline 100 are far away from the middle scraper 3221, so that the contact points of the scrapers 3221 on both sides and the pipeline 100 do not coincide with their own rotational installation positions in the radial direction of the transmission sleeve 31, thereby avoiding the dead point caused by the contact between the scraper 3221 and the pipeline 100.

[0052] Example 2: Figure 7 As shown, there are three scrapers 3221, which are arranged in a row; the scraper 3221 in the middle can be fixedly connected to the mounting plate 3211 of the telescopic assembly 321, and the other two scrapers 3221 can be slidably mounted on the mounting plate 3211 along the radial direction parallel to the pipeline 100 through the guide rod; the first elastic member 3222 is sleeved on the guide rod and connected to the scraper 3221 and the mounting plate 3211 respectively, so that the scraper 3221 is elastically slidably connected to the mounting plate 3211 through the first elastic member 3222, and the first elastic member 3222 is preferably a spring. When the scraper assembly 322 corresponds to the bending position of the pipeline 100, as shown in FIG. Figure 7 As shown, the two scrapers 3221 on both sides can adapt to the curved structure of the pipeline 100 by contacting the inner wall of the curved position of the pipeline 100 to compress the sliding of the first elastic member 3222.

[0053] It can be understood that the above two examples can both meet the needs of this application, and those skilled in the art can make their own selection according to actual needs.

[0054] In this embodiment, there are multiple specific structures of the traction assembly 4 that can drive the telescopic assembly 321 to expand by moving axially along the transmission sleeve 31; for ease of understanding, one of the structures will be described in detail below. Figures 8 to 11As shown, the traction assembly 4 includes a plurality of pushing components 41, a traction rope 42 and a driving component 43. The number of the pushing components 41 corresponds to the number of the grinding mechanisms 3, so that each pushing component 41 can be slidably installed in the interior of each transmission sleeve 31 and elastically contact and cooperate with the corresponding telescopic component 321. The traction rope 42 can pass through all the grinding mechanisms 3 and be connected to each pushing component 41. The driving component 43 is threadedly matched with the other end of the grinding chain group away from the motor 2, and the driving component 43 is connected to the traction rope 42.

[0055] When the grinding chain group moves into the pipe 100, the driving component 43 makes the traction rope 42 in a relaxed state through threaded cooperation, and then the telescopic component 321 can drive the pushing component 41 to move away from the driving component 43 through the driving end of the traction plate 3212 in the initial retracted state, so that the grinding chain group can remain in the retracted state and be extended into the pipe 100 to be electrolyzed.

[0056] When the grinding chain assembly is fully extended into the pipe 100, the driving component 43 can drive the traction rope 42 to move in the direction close to the driving component 43 by screwing with the thread at the end of the grinding chain assembly, and then the traction rope 42 can pull the pushing component 41 to move along the inner cavity of the transmission sleeve 31. At this time, the traction plate 3212 can cooperate with the pushing component 41 through the driving end to rotate around the middle installation position, and then drive the entire telescopic assembly 321 to drive the scraper assembly 322 to expand and move in the direction close to the inner wall of the pipe 100 until the scraper assembly 322 contacts the inner wall of the pipe 100.

[0057] It is understandable that if the pushing component 41 cooperates with the driving end of the traction plate 3212 in a rigid contact manner, then when the traction rope 42 moves toward the driving component 43, the moving distance of all the pushing components 41 along the corresponding transmission sleeve 31 is the same; assuming that the structural dimensions of all telescopic components 321 are consistent, the unfolding dimensions of all telescopic components 321 will be consistent. If there is a curved position in the pipeline 100, then when the grinding mechanism 3 passes through the curved position of the pipeline 100, those skilled in the art should know that the distance between the scraper component 322 on the large diameter side of the curved position of the pipeline 100 and the pipeline 100 will increase, while the distance between the scraper component 322 on the small diameter side of the curved position of the pipeline 100 and the pipeline 100 will decrease; that is, no matter where the scraper component 322 located at the curved position of the pipeline 100 is located, its distance from the inner wall of the corresponding side pipeline 100 is different from the distance from the scraper component 322 at the straight pipe section to the inner wall of the pipeline 100. However, due to the rigid contact between the pushing component 41 and the traction plate 3212, all the scraper assemblies 322 will be deployed at the closest distance to the inner wall of the pipe 100, that is, only the scraper assemblies 322 on the side of the small diameter of the curved position of the pipe 100 can contact the inner wall of the pipe 100, and the remaining scraper assemblies 322 will be spaced from the inner wall of the pipe 100, which will cause the cleaning effect of the scraper assemblies 322 to become very poor. Therefore, in this embodiment, the pushing component 41 is elastically contacted and matched with the driving end of the traction plate 3212, that is, when the moving distance of the traction rope 42 remains unchanged, the pushing components 41 corresponding to different positions can produce corresponding different degrees of deformation, thereby ensuring that the rotation angles of the traction plates 3212 at the corresponding positions are different, so as to ensure that all the scraper assemblies 322 can contact the inner wall of the pipe 100 at the corresponding positions.

[0058] Specifically, there are many specific structures of the pushing component 41 that can achieve the above functions. For the sake of easy understanding, a specific structure will be used for detailed description below. Figures 8 to 10As shown, the pushing component 41 includes a push plate 413, a second elastic member 412 and a slide plate 411. The slide plate 411 and the push plate 413 are both slidably mounted on the transmission sleeve 31, and the slide plate 411 and the push plate 413 are elastically connected through the second elastic member 412. The slide plate 411 is connected to the traction rope 42, and the push plate 413 cooperates with the driving end of each telescopic assembly 321. When the scraper assembly 322 needs to be unfolded, the traction rope 42 can pull the slide plate 411 to slide along the inner cavity of the transmission sleeve 31, and then the slide plate 411 pushes the push plate 413 through the second elastic member 412 to cooperate with the driving end of the traction plate 3212 of the telescopic assembly 321. The moving distance of the traction rope 42 is set according to the scraper assembly 322 farthest from the inner wall of the pipe 100 to be in stable contact with the inner wall of the pipe 100. In this way, the scraper assembly 322 closer to the inner wall of the pipe 100 can compress the push plate 413 to a greater extent through the corresponding telescopic assembly 321 to compress the second elastic member 412.

[0059] It is understandable that the specific structure of the second elastic member 412 is various, and it can be a spring, or a spring sheet, etc. In order to ensure the stable contact between the scraper assembly 322 and the inner wall of the pipe 100, a spring is preferably used for the second elastic member 412 in this embodiment. The spiral rotation of the driving component 43 can be manual or electric drive; for manual drive of the driving component 43, such as Fig.11 As shown, a handle 431 can be installed outside the driving component 43 to facilitate the rotation of the driving component 43. The push plate 413 can be annular, or a single pushing component 41 can include multiple push plates 413, and each push plate 413 can cooperate with the slide plate 411 through a separate second elastic member 412.

[0060] Specifically, if the push plate 413 is annular, then for the curved position of the pipeline 100, the degree to which the push plate 413 compresses the second elastic member 412 depends on the shortest distance between the scraper assembly 322 and the inner wall of the pipeline 100. At this time, the scraper assembly 322 corresponding to the curved large diameter position of the pipeline 100 will be spaced from the inner wall of the pipeline 100. However, the thickness of the scraper assembly 322 is relatively thin. When the scraper assembly 322 passes over the small diameter of the curved position of the pipeline 100 during the rotation of the transmission sleeve 31, the scraper assembly 322 can continue to expand under the elastic force of the second elastic member 412, thereby achieving cleaning of the remaining area of ​​the curved position of the pipeline 100. For the annular push plate 413, the grinding mechanism 3 corresponding to the curved position of the pipeline 100 preferably adopts a structure of installing a grinding assembly 32, so that it can be ensured that the scraper assembly 322 of the grinding assembly 32 can achieve complete cleaning of the curved position of the pipeline 100.

[0061] If the push plate 413 adopts a plurality of structures, such as Fig.10 In the structure shown, the specific number of push plates 413 is consistent with the number of telescopic components 321 included in the grinding component 32; the driving end of the traction plate 3212 of each telescopic component 321 corresponds to a push plate 413. Each push plate 413 is slidably connected with the slide plate 411 along the axial direction of the transmission sleeve 31 through a guide rod 4131, and a second elastic member 412 is sleeved on each guide rod 4131; of course, each push plate 413 can also slide with the inner wall of the transmission sleeve 31 through a guide structure, such as setting a guide groove on the inner wall of the transmission sleeve 31, and setting a guide slider on the side of the push plate 413 to slide with the guide groove. In this way, at the bending position of the pipeline 100, the telescopic components 321 at different locations squeeze the corresponding push plates 413 to compress the corresponding second elastic member 412 to different degrees to form different expansion degrees of the corresponding scraper assembly 322.

[0062] It should be noted that, in order to facilitate the traction rope 42 to pass through the entire grinding mechanism 3; Figure 4 As shown, a first through hole 330 can be provided on the universal joint block 33 corresponding to each grinding mechanism 3; Figures 8 to 10 As shown, a second through hole 4130 is provided in the middle of each annular push plate 413, or a second through hole 4130 is formed in the middle area surrounded by a plurality of push plates 413 corresponding to each push member 41. The traction rope 42 is connected to all the slide plates 411 by passing through the first through hole 330 and the second through hole 4130 of each grinding mechanism 3.

[0063] Those skilled in the art should know that the conventional method of electrolytically removing rust from the pipe 100 is to place the pipe 100 in an electrolytic cell, then connect the pipe 100 to the positive electrode of a power source, and connect the negative electrode of the power source to the metal electrode 61 in the electrolyte 700. Thus, the rust removal of the pipe 100 is achieved by energizing the power source. Therefore, in this embodiment, the motor 2 can be arranged outside the electrolytic cell, and then the grinding chain group together with the pipe 100 can be placed in the electrolytic cell, and one end of the grinding chain group can extend out of the electrolytic cell and be connected to the output shaft of the motor 2 for transmission. It should be noted that the end of the grinding chain group extending out of the electrolytic cell needs to be sealed with the side wall of the electrolytic cell to avoid leakage of the electrolyte 700. Although the voltage of electrolytic rust removal is not high, generally around 10V; but in order to ensure the working safety of motor 2, the output shaft of motor 2 can be connected to the grinding chain group through a coupling made of insulating material; that is, an insulating pad is provided in the coupling, and the two connecting ends of the coupling are transmitted in a circumferential direction through the insulating pad, so that the output shaft of motor 2 can be prevented from directly contacting the grinding chain group.

[0064] In this embodiment, since the outer wall of the pipe 100 is generally coated with anti-rust paint, and the pipe 100 mainly works through the inner cavity, the pipe 100 generally only needs to remove rust from the inner wall. Even if the rust on the outer wall is to be removed, it can be completed by grinding or the like. Then this embodiment can provide another method for removing rust from the inner wall of the pipe 100, such as Figure 1 and Fig.11 As shown, the auxiliary cleaning device also includes end caps sealed and installed at both ends of the grinding chain group. The two end caps can be respectively sealed and matched with the two ends of the pipe 100 to be electrolyzed, so that the internal space of the pipe 100 to be electrolyzed forms an electrolytic cell. At least one of the end caps is provided with a liquid injection port 520, so that during electrolysis, the electrolyte 700 can be injected into the interior of the pipe 100 through the liquid injection port 520 provided on the end cap; at the same time, the wire 62 of the metal electrode 61 located in the pipe 100 can also be extended to the outside through the liquid injection port 520 to connect to the power supply.

[0065] It is understandable that the two end caps can be defined as a first end cap 51 and a second end cap 52, respectively. Then one end of the grinding chain group needs to extend out of the first end cap 51 to connect with the output shaft of the motor 2; the other end of the grinding chain group needs to extend out of the second end cap 52 for installing the driving component 43, thereby facilitating the driving component 43 to unfold the grinding chain group outside the formed electrolytic cell. Of course, the two ends of the grinding chain group need to be sealed with the first end cap 51 and the second end cap 52, respectively.

[0066] It should be known that gas will be generated during the electrolytic derusting process, and the present embodiment can facilitate the gas generated during the electrolytic derusting process to overflow from the injection port 520 by setting the injection port 520 at the upper side of the end cap. At the same time, the electrolyte 700 will be consumed during the electrolysis process, so the upper end of the injection port 520 can be set higher than the upper side of the end cap, so that when the electrolyte 700 is injected, the electrolyte 700 can be injected beyond the upper side of the end cap, so that the electrolyte 700 located in the injection port 520 can be replenished for the electrolyte 700 consumed in the pipeline 100. The metal electrode 61 used for electrolysis can be first placed in the pipeline 100 when installing the end cap, and then the wire 62 is extended along the injection port 520 to complete the installation of the end cap.

[0067] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An auxiliary cleaning device for electrolytic rust removal of pipelines, characterized in that: include: A plurality of grinding mechanisms; adjacent grinding mechanisms are connected by a universal hinge structure to form a grinding chain group; the grinding chain group is suitable for being extended into the interior of the pipe to be electrolyzed in a retracted state, and the grinding chain group is suitable for bending and matching at the bending position of the pipe through the universal hinge structure; A traction assembly; the traction assembly runs through all the grinding mechanisms, and the traction assembly is suitable for synchronously driving all the grinding mechanisms to unfold so that the grinding mechanisms contact the inner wall of the pipe; as well as Motor; the motor is fixedly installed and connected to one end of the grinding chain group through an output end, and the motor is suitable for driving the entire grinding chain group to rotate.

2. The auxiliary cleaning device for electrolytic rust removal of pipelines according to claim 1, characterized in that: The grinding mechanism comprises: Transmission sleeve; adjacent grinding mechanisms are connected by forming a universal hinge structure through the transmission sleeve; and At least one grinding assembly; a plurality of the grinding assemblies are arranged at equal intervals along the outer circumferential direction of the transmission sleeve, and the driving end of the grinding assembly extends into the interior of the transmission sleeve and cooperates with the traction assembly; the grinding assembly is suitable for expanding or contracting along the radial direction of the transmission sleeve under the drive of the traction assembly.

3. The auxiliary cleaning device for electrolytic rust removal of pipelines according to claim 2, characterized in that: The grinding assembly comprises: Telescopic assembly; the telescopic assembly is installed on the transmission sleeve and extends into the transmission sleeve through the driving end to cooperate with the traction assembly; and The scraper assembly is installed at the connecting end of the telescopic assembly; the telescopic assembly is suitable for driving the scraper assembly to be in parallel contact with the inner wall of the pipeline by rotation or translation under the drive of the traction assembly.

4. The auxiliary cleaning device for electrolytic rust removal of pipelines as claimed in claim 3, characterized in that: The side of the transmission sleeve is provided with an axially extending through slot; the telescopic assembly comprises: A mounting plate; the mounting plate is used to mount the scraper assembly, and the mounting plate is arranged parallel to the axial direction of the transmission sleeve; A hinged plate; one end of the hinged plate is hinged to the mounting plate, and the other end is hinged to the side of the transmission sleeve; and A traction plate; the traction plate is mounted on the transmission sleeve by rotating the middle part and is parallel to the hinge plate, one end of the traction plate is hinged to the mounting plate, and the other end extends through the through slot to the inside of the transmission sleeve to form a driving end that cooperates with the traction assembly; The traction plate is suitable for rotating around the installation position under the driving force of the traction assembly along the axial movement of the transmission sleeve, thereby driving the installation plate to drive the scraper assembly to approach or move away from the inner wall of the pipeline in a parallel posture.

5. The auxiliary cleaning device for electrolytic rust removal of pipelines as claimed in claim 3, characterized in that: The grinding assemblies of adjacent grinding mechanisms are staggeredly arranged along the circumferential direction of the transmission sleeve; the scraper assemblies of adjacent grinding mechanisms partially overlap in length in the axial direction of the transmission sleeve.

6. The auxiliary cleaning device for electrolytic rust removal of pipelines as claimed in claim 3, characterized in that: The scraper assembly comprises: A plurality of scrapers; the plurality of scrapers are arranged in an axial direction of the transmission sleeve; and A plurality of first elastic members; part or all of the scrapers are mounted on the telescopic assembly through the first elastic members, so that the scrapers maintain contact with the inner wall of the pipe at the bending position of the pipe by driving the first elastic members to change their position for deformation.

7. The auxiliary cleaning device for electrolytic rust removal of pipelines according to claim 6, characterized in that: Among the plurality of scrapers corresponding to the scraper assembly, the scraper located in the middle is fixedly arranged with the telescopic assembly; The first elastic member is a torsion spring, and the remaining scrapers are elastically rotatably mounted with the telescopic assembly through the torsion spring; Alternatively, the first elastic member is a spring, and the remaining scrapers are elastically slidably mounted along the radial direction of the transmission sleeve via the spring and the telescopic assembly.

8. The auxiliary cleaning device for electrolytic rust removal of pipelines according to any one of claims 3 to 7, characterized in that: The traction assembly comprises: A plurality of pushing components; the pushing components are correspondingly slidably installed in each of the transmission sleeves and are elastically contacted and matched with the corresponding telescopic components; A traction rope; the traction rope runs through the entire polishing mechanism and is connected to each of the pushing components; and Driving component; the driving component is threadedly matched with the other end of the grinding chain assembly away from the motor, and the driving component is connected to the traction rope; The spiral movement of the driving component drives the traction rope to pull the pushing component to slide axially along the transmission sleeve, thereby pushing each telescopic component to drive the scraper component to unfold.

9. The auxiliary cleaning device for electrolytic rust removal of pipelines according to claim 8, characterized in that: The pushing component includes a pushing plate, a second elastic member and a sliding plate; The slide plate and the push plate are both slidably mounted on the transmission sleeve, and the slide plate and the push plate are elastically connected via the second elastic member; The slide plate is connected to the traction rope, and the push plate cooperates with the driving end of each telescopic assembly.

10. The auxiliary cleaning device for electrolytic rust removal of pipelines according to claim 1, characterized in that: The pipe to be electrolyzed is directly placed in the electrolytic cell, the motor is located outside the electrolytic cell, and the output shaft of the motor is connected to the grinding chain group through a coupling made of insulating material; Alternatively, the auxiliary cleaning device also includes end covers sealingly installed at both ends of the grinding chain group, and the end covers are suitable for sealingly cooperating with both ends of the pipe to be electrolyzed, so that the internal space of the pipe to be electrolyzed forms an electrolytic cell, and the electrolyte is suitable for being injected into the interior of the pipe through the injection port provided on the end cover; at the same time, the wire of the metal electrode located in the pipe extends to the outside through the injection port.

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