CN205074941U - Outside of tubes wall brushing device - Google Patents

Abstract

The utility model relates to an outside of tubes wall cleaning technology field provides an outside of tubes wall brushing device. The device includes two semi -rings, two rotators and two portions of washhing, the butt joint of can opening and shutting of two semi -rings, two rotators are the annular, and set up in the inboard of two semi -rings with the axle center respectively, when two semi -rings are closed, two rotator end to end, and can follow the inner wall rotation of two semi -rings under the drive of power structure, the brush hair of two portions of washhing inwards, and set up respectively on the inner wall of two rotators. During the use, will wait to scrub between tub immigration to two portions of washhing, closed two halves ring, it is rotatory to drive two rotating parts through the power structure, and two portions of washhing are just along with two rotating parts are together rotatory to formation is treated and is scrubbed the pipe ascending scrubbing of whole week, at the in -process of scrubbing, pass through the axial and originally scrub the device, can realize scrubbing of whole pipeline section, whole convenient, the high efficiency, laborsaving of process operation of scrubbing, that just scrubs is effectual.

Description

Pipe Brush for outer wall cleaning device

Technical field

The utility model relates to pipe outer wall Removal Technology field, provides a kind of pipe Brush for outer wall cleaning device.

Background technology

The outer wall of outdoor pipeline is brushed with paint protective layer usually, to prevent pipeline outer wall oxidation and rusting.But paint protective layer has certain term of validity usually, after having crossed the term of validity, part paint protective layer can come off because of the erosion at wind and rain, sunshine, if find, not in time, the part come off can be got rusty in also cheating.This regularly carries out regular cleaning, again brushes paint protective layer the outer wall of pipeline with regard to needing, and seriously causes pipe leakage or fracture in order to avoid get rusty.

Due to paint protective layer and non-integral come off simultaneously; got rusty seriously in some place possible, but the protective layer in some place is still intact, and this just brings very large trouble to cleaning; because overall polishing will be carried out to pipeline, and connect the very difficult cleaning of paint protective layer closely.

Tradition manner of cleaning up is normally by manually manually scrubbing; the personnel that scrub carry out complete cycle by wire brush to the outer wall of pipeline and scrub; again gradually to axial passing; this mode not only scrubs that efficiency is low, labour intensity is large; and the effect of scrubbing is also extremely uneven; bondingly firmly protective layer is painted for some, is difficult to scrub clean.

Utility model content

(1) technical problem that will solve

The purpose of this utility model be to provide a kind of easy to operate, to scrub efficiency high, and the pipe Brush for outer wall cleaning device that washing effect is good.

(2) technical scheme

For achieving the above object, the utility model provides a kind of pipe Brush for outer wall cleaning device, comprising:

Two semi-rings, two described semi-rings can dock in folding;

Two rotary bodies, two described rotary bodies are annular and concentric is arranged at the inner side of two described semi-rings respectively, when two described semi-rings close, two described rotary bodies are end to end and can rotate along the inwall of two described semi-rings under the drive of dynamic structure; And

Scrub portion for two, the bristle scrubbing portion described in two inwardly and be separately positioned on the inwall of two described rotary bodies.

Preferably, the portion of scrubbing described in is arc.

Preferably, described in scrub one end of the one end in portion and described rotary body hinged, described in scrub portion the other end be connected by the other end of elastic component with described rotary body.

Preferably, the bristle part of scrubbing portion described in can dismounting separately.

Preferably, the outer wall of described rotating part is circumferentially with arc-shaped rack;

Described semi-ring is provided with gear, and described gear and described arc-shaped rack engagement fit are also rotated by driven by motor.

Preferably, the outer wall of described rotary body is circumferentially with slideway, and described semi-ring circumference is laid with multiple roller, and multiple described roller rolls along described slideway.

Preferably, one end of two described semi-rings is hinged, and the other end is by buckle activity clamping.

Preferably, described buckle comprise block, pivot, depression bar, the first clamp, the first folding spring and the first stay cord;

Described blocking is arranged on a described semi-ring;

Described pivot and depression bar are all arranged on the outside of semi-ring described in another;

One end of described first clamp is articulated with described pivot, and the other end is arranged on the inner side of described depression bar and has aduncate kink;

Described first folding spring is wire-wrapped in described pivot and forms resiliency supported between described first clamp and described depression bar;

Described first stay cord is connected with described first clamp.

Preferably, also comprise return mechanism, described return mechanism comprises first end shrouding, the second end-plate, extension spring, elastic shrinkage structure and the second stay cord;

Described first end shrouding and the second end-plate are separately positioned on the same axial side of two described rotary bodies and being connected with two described semi-rings of correspondence, and one end of described first end shrouding is provided with spring cavity;

Described first end shrouding offers the first chute towards the side circumference of described rotary body, and one end of described first chute is communicated with described spring cavity;

Described second end-plate offers the second chute towards the side circumference of described rotary body, and when two described rotary bodies are end to end, described second chute is connected with the other end of described first chute;

One end of described extension spring is plugged in described spring cavity, and described extension spring in its natural state entirety be placed in described spring cavity;

Described elastic shrinkage anatomical connectivity is at the other end of described extension spring, described second stay cord and described elastic shrinkage anatomical connectivity, for pulling described elastic shrinkage structure along described spring cavity, first chute and the second chute be communicated with formation passage in slide, on two described rotary bodies, and side relative with the second end-plate with described first end shrouding is respectively equipped with limiting section, when described elastic shrinkage structure skids off described spring cavity, the part of described elastic shrinkage structure is leant out by the opening of described first chute, and be elastically against on described rotary body, to form spacing cooperation with described limiting section.

Preferably, described elastic shrinkage structure comprises the second clamp, the 3rd clamp and the second folding spring, one end of described second clamp and the 3rd clamp is all articulated with described extension spring, described second folding spring resiliency supported, between described second clamp and the 3rd clamp, is elastically against on described rotary body to make described second clamp be leant out by the opening of described second chute when skidding off described spring groove.

(3) beneficial effect

A kind of pipe Brush for outer wall cleaning device that the utility model provides, comprise two can folding docking semi-ring, two be arranged on rotary body inside two semi-rings and two and be arranged on and scrub portion inside two rotary bodies; Two rotary bodies can rotate along the inwall of two semi-rings under the drive of dynamic structure, and two scrub portion along with two rotating parts together rotates, thus are formed the pipe to be scrubbed be clipped in wherein scrubbing throughout the circumferential; In the process, by axially passing this washing and brushing device, can realize scrubbing of whole pipeline section, whole to scrub process operation convenient, efficient, laborsaving, and scrub effective.

Accompanying drawing explanation

Fig. 1 is the front view of a kind of pipe Brush for outer wall cleaning device of the utility model embodiment.

Fig. 2 is that the axle of a kind of pipe Brush for outer wall cleaning device of the utility model embodiment surveys view.

Fig. 3 is the zoomed-in view at A place in Fig. 2.

Fig. 4 is the schematic diagram of the dynamic structure in the utility model embodiment.

Fig. 5 is the installation diagram of the return mechanism in the utility model embodiment.

Fig. 6 is the schematic diagram of the return mechanism in the utility model embodiment.

Fig. 7 is the schematic diagram of the first end shrouding in the utility model embodiment.

Fig. 8 is the schematic diagram of the second end-plate in the utility model embodiment.

Reference numeral:

1, semi-ring; 11, rotating shaft; 12, roller; 13, pull bar; 2, rotary body; 21, arc-shaped rack; 22, gear; 23, slideway; 3, portion is scrubbed; 31, bristle; 32, elastic component; 4, handle; 5, first end shrouding; 51, spring cavity; 52, the first chute; 6, the second end-plate; 61, the second chute; 7, the 3rd end-plate; 81, block; 82, pivot; 83, depression bar; 84, the first clamp; 85, the first folding spring; 91, limiting section; 92, extension spring; 93, the second clamp; 94, the 3rd clamp; 95, the second folding spring.

Detailed description of the invention

Below in conjunction with drawings and Examples, detailed description of the invention of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.

In description of the present utility model, except as otherwise noted, term " on ", the orientation of the instruction such as D score, "left", "right" or state relation be based on orientation shown in the drawings or state relation, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.

Shown in composition graphs 1 and Fig. 2, a kind of pipe Brush for outer wall cleaning device that the utility model embodiment provides, comprise two semi-rings, 1, two rotary bodies 2 and two scrub portion 3; One end of two semi-rings 1 is articulated and connected, and the other end is by buckle activity clamping, and form loop configuration after docking, two semi-rings 1 also can be that two ends are activity clamping, as long as can realize can folding dock can, to make pipe to be scrubbed move into wherein; Two rotary bodies 2 are also all loop configuration and concentric is arranged at the inner side of two semi-rings 1 respectively, the external diameter of two rotary bodies 2 is slightly less than the internal diameter of two semi-rings 1, when two semi-rings 1 close, two rotary bodies 2 are also end to end and can rotate along the inwall of two semi-rings 1 under the drive of dynamic structure, and this dynamic structure is the drives structure doing relative rotary motion between two semi-rings 1 and two rotary bodies 2; Two bristles 31 scrubbing portion 3 inwardly and be separately positioned on the inwall of two rotary bodies 2, thus when two semi-rings 1 close, in the middle of pipe to be scrubbed just has been clipped in by bristle 31 part that two scrub portion 3.

During use, first that the orientation adjustment of two rotary bodies 2 is extremely corresponding with the orientation of two semi-rings 1, make two semi-rings 1 relatively unlimited again, making pipe to be scrubbed move into two by the opening of two semi-rings 1 scrubs between portion 3, subsequently two semi-rings 1 are fastened, now, two bristles 31 scrubbing portion 3 have just been packaged in the both sides of pipe to be scrubbed respectively.Before starting to scrub, first two semi-rings 1 are kept relative fixing in the circumferential with pipe to be scrubbed, specifically the outer wall of a semi-ring 1 wherein can connect handle 4, facilitate hand-held while to being formed fixing by semi-ring 1, in addition, also handle 4 can be set to scalable or foldable structure, higher or be difficult to the pipe to be scrubbed that touches to tackle position.Will after scrubbing pipe and wrapping, drive two rotating parts to rotate by dynamic structure, two scrub portion 3 just along with two rotating parts together rotate, thus are formed to treat and scrub pipe scrubbing throughout the circumferential; In the process of scrubbing, by axially passing this washing and brushing device, can realize scrubbing of whole pipeline section, whole to scrub process operation convenient, efficient, laborsaving, and scrub effective.

Wherein, scrub portion 3 and be preferably arc, the portion of scrubbing 3 of arc more can adapt with the profile of pipe to be scrubbed, thus the contact area between the outer wall increasing bristle 31 and pipe to be scrubbed, improve washing effect.

Preferably, the one end of scrubbing the one end in portion 3 and the inwall of rotary body 2 is hinged, the other end is connected with the other end of rotary body 2 by elastic component 32, this elastic component 32 can for the multiple springs be arranged side by side, the curvature of scrubbing portion 3 should be less than the curvature of rotary body 2, inwardly to be formed between the inwall of semi-ring 1 and the gap of external-adjuster, when the inner side in the portion of scrubbing 3 is subject to outside power, there is adaptive stretching in elastic component 32, make the portion of scrubbing 3 place basic circle to radius increase, thus this device can be made to adapt to the pipe to be scrubbed of different tube diameters, between the outer wall that simultaneously can ensure bristle 31 and pipe to be scrubbed, there is lasting relative pressure, even if bristle 31 consumes, this relative pressure still can keep, do not affect the quality of scrubbing, also improve the Acceptable life of bristle 31 on the other hand, save cost.

Bristle 31 part of scrubbing portion 3 preferably can disassembly and assembly structure separately, due to pipe outer wall to scrub frictional force very big, so bristle 31 part is easy to wear and tear, belong to easily-consumed products, but because the one end in the portion of scrubbing 3 and rotary body 2 are for hinged, the other end is connected with rotating part by multiple spring, extremely bothers so dismounting is got up.And this device is by being set to bristle 31 part in the portion of scrubbing 3 dismounting to connect separately, can effectively avoid tearing spring-loaded trouble open.Wherein, bristle 31 can be partially integrated on a sub-brush board, then mode formed removably connects with the body part scrubbing portion 3 is connected by screw etc. by this sub brush plate, when bristle 31 wear up to cannot continue to use time, only need change a sub-brush board, easy to operate.

Again shown in composition graphs 4, concrete, above-mentioned dynamic structure comprises arc-shaped rack 21, gear 22 and motor, and arc-shaped rack 21 circumference is arranged on the outer wall of rotating part, and when two rotating parts are end to end, two arc-shaped racks 21 are spliced into annular; Gear 22 and the motor driving this gear 22 to rotate all are fixed on semi-ring 1, specifically motor can be arranged on the inside of handle 4, through hole is offered in the position be connected on semi-ring 1 and with handle 4, the output shaft that gear 22 is arranged on motor engages with two arc-shaped racks 21 through this through hole, thus drives two rotary bodies 2 to rotate by the rotation of motor.

The axial two ends of semi-ring 1 are equipped with outer rim, many rotating shafts 11 are connected with between the outer rim at axial two ends, many rotating shaft 11 circumferences are uniform, each rotating shaft 11 is provided with roller 12, and be provided with the window relative with this roller 12 position on the sidewall of semi-ring 1, the part of roller 12 is through this opening within being insinuated into the inwall of semi-ring 1, with the wall contacts with rotary body 2; The outer wall of rotary body 2 is circumferentially with slideway 23, slideway 23 to offer position relative with roller 12, the part that roller 12 is probeed into by window is rolled and is arranged in slideway 23, thus, circumferential uniform multiple rollers 12 not only form guide effect to the rotation of rotary body 2, make rotary body 2 form concentric with semi-ring 1 and coordinate, also can make to form gap between rotary body 2 and semi-ring 1, the rolling that the part contacted is only between roller 12 with slideway 23 coordinates, and therefore resistance is little, and stability of rotation.In addition, can all arrange multiple roller 12 in every root rotating shaft, accordingly, the slideway 23 that the outer wall of rotary body 2 is arranged also for multiple, thus can realize supporting more stably rotary body 2.

Two semi-rings 1 are preferably by location structure activity button-fold, concrete, can wherein a semi-ring 1 treat buckling surface is arranged one or more spacer pin, and the jack of corresponding number is set on another semi-ring 1, when two semi-rings fasten relatively, spacer pin and spacing hole form grafting and coordinate.In the process of scrubbing, plant running can with the generation of vibration, and owing to also can not there is relative dislocation between two semi-rings, therefore rotary body 2 can run stably in two semi-rings, and then the generation of vibration can be suppressed again, thus make operation more stable, convenient, ensure that and scrub quality.

Again shown in composition graphs 3, concrete, above-mentioned buckle comprise block 81, pivot 82, depression bar 83, first clamp 84, first folding spring 85 and the first stay cord; Block and 81 to be arranged on one of them semi-ring 1 and near the position of opening, as a matrix of two semi-rings 1 snapping mutually; Pivot 82 and depression bar 83 are all arranged on the outside of another semi-ring 1, and the position of depression bar 83 is compared with the opening of pivot 82 closer to semi-ring 1, and the axle center of distance semi-ring 1 is also far away simultaneously; One end of first clamp 84 is articulated with pivot 82, the other end is arranged on the inner side of depression bar 83 and has aduncate kink, namely the first clamp 84 can do small angle oscillation between depression bar 83 and the outer wall of semi-ring 1, the kink of pressing plate can be stuck in the openend of its place semi-ring 1, as another matrix of the mutual snapping of two semi-rings 1; The body part of the first folding spring 85 is wire-wrapped in pivot 82, and two elastic edges are against the outside of the first clamp 84 and the inner side of depression bar 83 respectively, thus form resiliency supported between the first clamp 84 and depression bar 83; One end of first stay cord is connected on the first clamp 84, and the other end is directed to the end of handle 4, facilitates pull operation, by pulling stay cord, the first clamp 84 can be made to extend out motion.

When two semi-rings 1 are about to closed, pull the first stay cord, first clamp 84 is circumvented to extending out and blocks 81, after two semi-rings 1 are closed, unclamp the first stay cord, the first clamp 84 inwardly rotates under the elastic force effect of the first folding spring 85, and then by its inside kink and 81 formation snappings of blocking, only having by again pulling the first stay cord, the kink of the first clamp 84 just can be made to depart from and block 81.Further, kink is arc or inclined-plane with block 81 relative sides and/or 81 sides relative with kink of blocking, thus, when two semi-rings 1 are about to closed, without the need to controlling the first clamp 84 to extending out, the kink of the first pressing plate 81 contacts and naturally can mutually stagger afterwards with blocking.

Shown in composition graphs 1 and Fig. 2, preferably, also comprise pull bar 13, one end of this pull bar 13 is connected on a semi-ring 1 not being connected with handle 4, pull bar 13 is also connected with the 3rd stay cord, by pulling the 3rd stay cord from different directions, pull bar 13 is swung, and then pull bar 13 place semi-ring 1 can be driven to do open and close movement relative to another semi-ring 1.Preferably, the other end of pull bar 13 is extended to the opposite side of handle 4 by the side of handle 4, can the 3rd stay cord is directed on handle 4 like this, and when pulling the 3rd stay cord to the direction of handle 4, two semi-rings 1 can do closing motion; As for the open operation of two semi-rings 1, then without the need to being controlled by pull bar 13 because the first clamp 84 with block 81 mutually departs from after, pull back handle 4, pipe to be scrubbed can be deviate from naturally from two semi-rings 1, and two semi-rings 1 also can open wide naturally.

Shown in composition graphs 5 to Fig. 8, preferably, also comprise return mechanism, this return structure is used for before two semi-rings 1 are opened, and manually makes two rotary bodies 2 rotate to adapting with the orientation at two semi-ring 1 places.Return mechanism comprises first end shrouding 5, second end-plate 6, extension spring 92, elastic shrinkage structure and the second stay cord, first end shrouding 5 and the second end-plate 6 are separately positioned on the same axial side of two rotary bodies 2 and being connected with two semi-rings 1 of correspondence, and one end of first end shrouding 5 is provided with spring cavity 51, one end that first end shrouding 5 offers the first chute 52, first chute 52 towards the side circumference of rotary body 2 is communicated with spring cavity 51, second end-plate 6 offers the second chute 61 towards the side circumference of rotary body 2, and when two rotary bodies 2 are end to end, the second chute 61 is connected with the other end of the first chute 52, one end of extension spring 92 is plugged in spring cavity 51, and extension spring 92 in its natural state entirety be placed in spring cavity 51, elastic shrinkage anatomical connectivity is at the other end of extension spring 92, second stay cord and elastic shrinkage anatomical connectivity, for pulling elastic shrinkage structure along spring cavity 51, first chute 52 and the second chute 61 be communicated with in the passage that formed and slide, on two rotary bodies 2, and side relative with the second end-plate 6 with first end shrouding 5 is respectively equipped with limiting section 91, when elastic shrinkage structure skids off spring cavity 51, the part of elastic shrinkage structure is leant out by the opening of the first chute 52, and be elastically against on rotary body 2, to orientation, limiting section 91 place, spacing cooperation is formed with limiting section 91 until follow-up rotation, thus driven rotary body 2 rotates in a circumferential direction, when the orientation rotation of two rotary bodies 2 is extremely consistent with the orientation of two semi-rings 1, remove the pulling force to the second stay cord, the counter motion under the pulling force effect of extension spring 92 of elastic shrinkage portion, depart from simultaneously and coordinate with the spacing of limiting section 91, in final retraction spring cavity 51.

Further, elastic shrinkage structure comprises the second clamp 93, 3rd clamp 94 and the second folding spring 95, limiting section 91 is for being opened in the groove on rotary body 2, one end of second clamp 93 and the 3rd clamp 94 is all articulated with extension spring 92, second folding spring 95 resiliency supported is between the second clamp 93 and the 3rd clamp 94, be elastically against on rotary body 2 to make the second clamp 93 be leant out by the opening of the second chute 61 when skidding off spring groove, when the second clamp 93 slides into described groove, the end of the second clamp 93 is against on the sidewall of groove, this side sidewall of groove is preferably vertical with bottom land, thus make the second clamp 93 form spacing cooperation with groove, when the second clamp 93 counter motion, the second clamp 93 just skids off along the opposite side sidewall of groove, and this side sidewall preferably has certain slope, and the angle between bottom land is obtuse angle, so that the skidding off of the second clamp 93.

Preferably, also comprise two the 3rd end-plates 7, two the 3rd end-plates 7 are separately positioned on another axial side of two rotary bodies 2 and being connected with two semi-rings 1 of correspondence, first end shrouding 5 and the second end-plate 6 and two the 3rd end-plates 7 all extend limited location inner edge to the inner side of two rotary bodies 2, therefrom deviate to prevent two halves ring 1 rotary body 2 when opening.

The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and replacement, these improve and replace and also should be considered as protection domain of the present utility model.

Claims (10)

1. a pipe Brush for outer wall cleaning device, is characterized in that, comprising:

Two semi-rings (1), two described semi-rings (1) can be docked in folding;

Two rotary bodies (2), two described rotary bodies (2) are annular and concentric is arranged at the inner side of two described semi-rings (1) respectively, when two described semi-rings (1) are closed, two described rotary bodies (2) are end to end and can rotate along the inwall of two described semi-rings (1) under the drive of dynamic structure; And

Scrub portion (3) for two, the bristle (31) scrubbing portion (3) described in two inwardly and be separately positioned on the inwall of two described rotary bodies (2).

2. pipe Brush for outer wall cleaning device according to claim 1, is characterized in that, described in scrub portion (3) be arc.

3. pipe Brush for outer wall cleaning device according to claim 1, it is characterized in that, described scrub portion (3) one end and one end of described rotary body (2) hinged, described in scrub portion (3) the other end be connected with the other end of described rotary body (2) by elastic component (32).

4. pipe Brush for outer wall cleaning device according to claim 3, is characterized in that, described in scrub portion (3) bristle (31) part can dismounting separately.

5. pipe Brush for outer wall cleaning device according to claim 1, is characterized in that, the outer wall of described rotating part is circumferentially with arc-shaped rack (21);

Described semi-ring (1) is provided with gear (22), and described gear (22) and described arc-shaped rack (21) engagement fit are also rotated by driven by motor.

6. pipe Brush for outer wall cleaning device according to claim 1, it is characterized in that, the outer wall of described rotary body (2) is circumferentially with slideway (23), described semi-ring (1) circumference is laid with multiple roller (12), and multiple described roller (12) is rolled along described slideway (23).

7. pipe Brush for outer wall cleaning device according to claim 1, is characterized in that, one end of two described semi-rings (1) is hinged, and the other end is by buckle activity clamping.

8. pipe Brush for outer wall cleaning device according to claim 7, it is characterized in that, described buckle comprises block (81), pivot (82), depression bar (83), the first clamp (84), the first folding spring (85) and the first stay cord;

Described block (81) are arranged on a described semi-ring (1);

Described pivot (82) and depression bar (83) are all arranged on the outside of semi-ring described in another (1);

One end of described first clamp (84) is articulated with described pivot (82), and the other end is arranged on the inner side of described depression bar (83) and has aduncate kink;

Described first folding spring (85) is wire-wrapped in described pivot (82) and forms resiliency supported between described first clamp (84) and described depression bar (83);

Described first stay cord is connected with described first clamp (84).

9. the pipe Brush for outer wall cleaning device according to any one of claim 1 to 8, it is characterized in that, also comprise return mechanism, described return mechanism comprises first end shrouding (5), the second end-plate (6), extension spring (92), elastic shrinkage structure and the second stay cord;

Described first end shrouding (5) and the second end-plate (6) are separately positioned on the same axial side of two described rotary bodies (2) and being connected with two described semi-rings (1) of correspondence, and one end of described first end shrouding (5) is provided with spring cavity (51);

Described first end shrouding (5) offers the first chute (52) towards the side circumference of described rotary body (2), and one end of described first chute (52) is communicated with described spring cavity (51);

Described second end-plate (6) offers the second chute (61) towards the side circumference of described rotary body (2), when two described rotary bodies (2) are end to end, described second chute (61) is connected with the other end of described first chute (52);

One end of described extension spring (92) is plugged in described spring cavity (51), and described extension spring (92) in its natural state entirety be placed in described spring cavity (51);

The other end of described elastic shrinkage anatomical connectivity in described extension spring (92), described second stay cord and described elastic shrinkage anatomical connectivity, for pulling described elastic shrinkage structure along described spring cavity (51), first chute (52) and the second chute (61) be communicated with in the passage that formed and slide, on two described rotary bodies (2), and side relative with the second end-plate (6) with described first end shrouding (5) is respectively equipped with limiting section (91), when described elastic shrinkage structure skids off described spring cavity (51), the part of described elastic shrinkage structure is leant out by the opening of described first chute (52), and be elastically against on described rotary body (2), to form spacing cooperation with described limiting section (91).

10. pipe Brush for outer wall cleaning device according to claim 9, it is characterized in that, described elastic shrinkage structure comprises the second clamp (93), 3rd clamp (94) and the second folding spring (95), one end of described second clamp (93) and the 3rd clamp (94) is all articulated with described extension spring (92), described second folding spring (95) resiliency supported is between described second clamp (93) and the 3rd clamp (94), be elastically against on described rotary body (2) to make described second clamp (93) be leant out by the opening of described second chute (61) when skidding off described spring groove.