CN112756348B

CN112756348B - Scraping device

Info

Publication number: CN112756348B
Application number: CN202011495689.1A
Authority: CN
Inventors: 张弛; 段文凯; 冯贺松; 宋玖欣; 王鹏栋; 路之卓
Original assignee: Shijiazhuang Yixin Technology Development Co ltd
Current assignee: Shijiazhuang Xincong Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-05-13
Anticipated expiration: 2040-12-17
Also published as: CN112756348A

Abstract

The invention provides a scraping device, which comprises an extension ladder, a body and a plurality of scraping units, wherein the extension ladder is telescopically arranged on a rack, the body is arranged on the extension ladder and can rotate relative to the extension ladder, the plurality of scraping units are circumferentially arranged at intervals around the body, each scraping unit comprises a scraping arm, one end of each scraping arm is pivotally connected to the body, a first scraping part and an adjusting and maintaining mechanism, and the first scraping part is arranged at the other end of each scraping arm. According to the scraping device, the adjusting piece can slide downwards when external operating force is applied, the first scraping part is close to the middle part of the body, so that the scraping unit can enter the barrel body smoothly, the first elastic piece drives the adjusting piece to reset through the release of the external operating force, each scraping arm is kept on the body in a state perpendicular to the axis of the body, and impurities on the inner wall of the barrel body can be scraped conveniently in the rotating process of the body; do benefit to the efficiency that improves the scraping, shorten the cycle of scraping, do benefit to the result of use that improves the staving.

Description

Scraping device

Technical Field

The invention relates to the technical field of scraping equipment, in particular to a scraping device.

Background

The cooling barrel is often used in pharmaceutical factories to condense gaseous medicines to solid, but along with the increase of the service life of the cooling barrel, the inner wall of the cooling barrel is easy to adhere to solid medicines, and if the cooling barrel is not cleaned in time, the use of the cooling barrel can be influenced.

Among the prior art, adopt the mode of artifical striking off to clear up adnexed solid-state medicine usually, because adnexed solid-state medicine in the cooling barrel leans on more loose more, leans on more firmly more down, adopts the manual work to carry out the inefficiency of clearing up, and the cycle length of clearing up usefulness is unfavorable for the use of cooling barrel. Although some scraping devices are also available on the market, the use effect is poor due to the unreasonable structural design.

Disclosure of Invention

In view of this, the present invention is directed to a scraping device, which is convenient for scraping off impurities in a barrel body and has a good use effect.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a scraping device, installs in the frame for strike off attached to the impurity on the staving inner wall, this scraping device includes:

the telescopic ladder is telescopically arranged on the rack;

the body is arranged on the extension ladder and can rotate relative to the extension ladder by bearing external rotation driving force;

the scraping units are arranged at intervals in the circumferential direction of the body, and each scraping unit comprises a scraping arm with one end pivotally connected to the body and a first scraping part arranged at the other end of each scraping arm relative to the body;

the adjusting and maintaining mechanism comprises an adjusting piece which is sleeved on the body in a sliding manner and is positioned above each scraping arm, and a transmission piece which is respectively connected between the adjusting piece and each scraping arm in a pivoting manner, wherein a first elastic piece which applies pushing force towards the direction of the adjusting piece to each scraping arm is arranged between the body and each scraping arm;

when the adjusting piece slides downwards due to bearing of external operating force, the first scraping parts are close to the middle of the body, and the first elastic piece stores energy; when the external operating force is relieved, the first elastic piece releases the energy storage to drive the adjusting piece to reset, and each scraping arm is kept on the body in a state of being perpendicular to the axis of the body.

Further, the first scraping portion includes a scraper seat slidably connected to the scraping arm and having a plurality of scrapers, and a second elastic member is connected between the scraper seat and the scraping arm.

Furthermore, a driving part is rotatably arranged on the body and located above the adjusting part, an arc-shaped bulge is constructed on the driving part, a groove for the bulge to insert is formed in the body, and when the driving part is driven to rotate by external operating force, the bulge pushes the adjusting part to generate movement far away from the driving part.

Further, first elastic component for connect in strike off the torsional spring on the arm, the both ends of torsional spring connect respectively in strike off the arm with between the body.

Furthermore, a plurality of mounting arms which are arranged in a staggered manner with the scraping arms are arranged on the body, and a second scraping part is arranged at the free end of each mounting arm.

Furthermore, the second scraping part comprises an installation rod connected to the free end of the installation arm, and a steel wire body arranged at the free end of the installation rod, and the position of the installation rod relative to the installation arm is adjustable.

Further, the body install in the bottom of extension ladder, the extension ladder includes roll two at least terraces that link to each other, and locate adjacent two actuating mechanism between the terraces, because of actuating mechanism's setting, arrange by lower the terraces for by upper arrangement the terraces have along vertical direction motion.

Furthermore, each ladder body is shaped like a U, and connecting plates are connected between two sides of each ladder body.

Furthermore, the driving mechanism comprises a driving part arranged on one of the two adjacent ladder bodies and a transmission pair arranged between the two adjacent ladder bodies in a matching way; the transmission pair is configured to transmit a rotational operation force from the driving portion from one of the ladder bodies to the other ladder body to urge the ladder body disposed below to have a lifting motion in a vertical direction with respect to the ladder body disposed above.

Furthermore, the transmission pair comprises a rack fixedly connected to the ladder body arranged on the upper portion and a gear which follows the ladder body arranged on the lower portion and is in meshing transmission with the rack.

Compared with the prior art, the invention has the following advantages:

according to the scraping device, the telescopic ladder is arranged, so that the scraping unit can be conveniently stretched into different depths of the body, and impurities in the barrel body can be conveniently scraped; the regulating part slides downwards when can through external operation power, and first portion of scraping draws close towards the middle part of body to be convenient for strike off in the smooth staving that enters into of unit, and through the removal of external operation power, first elastic component orders about the regulating part and resets, and each strikes off the arm and keeps on the body with the state of perpendicular to body axis, thereby is convenient for strike off the impurity on the staving inner wall at body pivoted in-process. This scraping device's convenient operation, and can replace the manual work to strike off work, do benefit to the efficiency that improves to strike off, shorten the cycle of striking off, do benefit to the result of use that improves the staving.

Simultaneously, through set up the second elastic component between scraper seat and scraping arm, can make the position of scraping the portion adjust that stretches out and draws back according to the specification of staving to better use flexibility has. The position of the adjusting piece is adjusted by matching the protrusion on the driving piece with the groove on the adjusting piece, and the adjusting device has the advantages of simple adjusting mode and convenience in use. In addition, through setting up the second portion of striking off, do benefit to further improvement and strike off the effect to the staving inner wall, and the distance between installation arm and the installation pole is adjustable, can improve the flexibility of second portion of striking off when using.

In addition, the connecting plate is arranged on the ladder body, so that the deformation of the ladder body in use is reduced, and the effect of the ladder body in use is improved. The length adjustment between two adjacent ladder bodies is realized by adopting the meshing transmission of the gear and the rack, the product is mature, and the use stability is good.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a scraping device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a scraping unit according to an embodiment of the present invention at a viewing angle;

fig. 3 is a schematic structural diagram of a scraping unit according to an embodiment of the present invention at another viewing angle;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of the internal structure of the body according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a scraper seat according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the extension ladder according to the embodiment of the present invention at a viewing angle;

fig. 8 is a schematic structural view of the extension ladder according to the embodiment of the present invention from another viewing angle;

FIG. 9 is a schematic view of a portion of a second ladder according to an embodiment of the invention;

description of reference numerals:

1. a body; 2. a first motor; 3. a first mounting plate; 4. a drive member; 5. an adjustment member; 6. a scraping arm; 7. a mounting arm; 8. a torsion spring; 9. a frame; 10. a rolling body;

11. a third mounting plate; 12. a base plate; 13. a first column; 14. a second cylinder; 15. an inner barrel body; 16. a first through hole; 17. a first rack; 18. a first ladder body; 19. a second ladder body; 20. a third ladder body; 21. a first gear; 22. a fourth ladder body; 23. a connecting plate;

41. an operating lever; 51. a groove; 52. an annular plate; 53. a transmission member; 54. an extension plate; 61. a connecting rod; 62. a scraper seat; 63. a scraper; 64. a limiting block; 71. mounting a rod; 72. fixing the rod; 73. a steel wire body;

181. a second rack; 191. a second motor; 192. a third rack; 193. a second gear; 194. a fourth mounting plate; 195. a protrusion; 201. a third motor; 202. a third gear; 203. a fourth rack; 221. a fourth motor; 222. a fourth gear; 223. a second mounting plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" to "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

This embodiment relates to a scraping device, installs in the frame for strike off attached to the impurity on the staving inner wall, the staving in this embodiment specifically can be the cooling barrel who uses in the pharmaceutical factory, scraping device is used for striking off its inner wall adnexed impurity. Of course, the scraping device in this embodiment may also be used for scraping off impurities on the inner wall of the bucket body for other purposes, and the following description will take the bucket body as a cooling bucket as an example.

The scraping device comprises a telescopic ladder which is telescopically arranged on a rack, is arranged on the telescopic ladder and is used for bearing external rotary driving force, and a plurality of scraping units are arranged at intervals in the circumferential direction of a ring body relative to a telescopic ladder rotating body. Each scraping unit comprises a scraping arm with one end pivotally connected to the body and a first scraping part arranged at the other end of each scraping arm relative to the body.

The scraping device also comprises an adjusting and maintaining mechanism, an adjusting piece and a transmission piece, wherein the adjusting piece is slidably sleeved on the body and is positioned above each scraping arm, the transmission piece is respectively and pivotally connected between the adjusting and matching piece and each scraping arm, and a first elastic piece is arranged between the body and each scraping arm and is used for applying pushing force to each scraping arm towards the direction of the adjusting piece.

When the adjusting piece slides downwards due to bearing of external operating force, the first scraping parts are close to the middle of the body, and the first elastic piece stores energy; when the external operating force is relieved, the first elastic piece releases energy storage to drive the adjusting piece to reset, and each scraping arm is kept on the body in a state of being perpendicular to the axis of the body.

Based on the above general description, an exemplary structure of the scraping device in the present embodiment is shown in fig. 1, wherein the frame 9 is disposed corresponding to the top end of the barrel, the extension ladder is disposed along the height direction of the barrel, and the body 1 is disposed corresponding to the middle of the top end opening of the barrel. The extension ladder is used for adjusting the height of the body 1 in the barrel body, so that the scraping unit scrapes impurities on the inner wall of the barrel body from top to bottom. The effect of scraping the unit is mainly at 1 pivoted in-process of body, strikes off the impurity on the staving inner wall, and impurity drops downwards along the inner wall of barrel.

The structure of body 1 in this embodiment refers to and is shown in fig. 2-5, and wherein, body 1 is the column that inside cavity set up, is equipped with first mounting panel 3 in the bottom of extension ladder, rotates on the top of body 1 and is equipped with second mounting panel 223, and body 1 is installed on the extension ladder through linking firmly between first mounting panel 3 and the second mounting panel 223. Wherein, the body 1 endotheca is equipped with rather than the relatively fixed interior staving 15, installs the first motor 2 that provides above-mentioned outside rotary driving power on the bottom plate 12 of body 1 bottom to install the eccentric first gear 21 of locating interior staving 15 in the power take off of first motor 2. Corresponding to the first gear 21, a first rack 17 circumferentially arranged is arranged between the body 1 and the inner barrel, an arc-shaped first through hole 16 is arranged on the inner barrel 15, and at least part of the first rack 17 is exposed out of the first through hole 16 and is meshed and connected with the first gear 21. So set up, under the drive of first motor 2, through the meshing transmission between first rack 17 and the first gear 21 can realize the rotation of body 1 for the extension ladder.

The aforesaid strikes off three that the unit was arranged to the circumference interval of ring body 1, wherein strikes off arm 6 and connects the well lower part at body 1, and here, for the installation that strikes off arm 6, has three third mounting panel 11 in the circumference interval arrangement of body 1, and each third mounting panel 11 all is "L" shape of inversion, and wherein, the riser in the third mounting panel 11 is connected on the plate body, and the diaphragm is connected on the top of riser and perpendicular to riser setting.

The scraping arm 6 in this embodiment is in a rectangular parallelepiped shape, and corresponds to the third mounting plate 11, and the bottom side of the scraping arm 6 is pivotally connected to the vertical plate of the third mounting plate 11 via a pivot shaft. One end of the pivotal shaft is fixedly connected with a first column body 13 which is perpendicular to the pivotal shaft, the first column body 13 is connected with a second column body 14 which is parallel to the pivotal shaft, the first elastic part is a torsion spring 8 which is sleeved on the second column body 14, and two free ends of the torsion spring 8 are respectively abutted between the bottom surface of the scraping arm 6 and the vertical plate of the third mounting plate 11. And because of the setting of diaphragm on the third mounting panel 11 for strike off arm 6 and can only pivot downwards, thereby play better limiting displacement.

In addition, the first scraping portion includes a scraper seat 62 slidably connected to the scraping arm 6 and having a plurality of scrapers 63, and a second elastic member is connected between the scraper seat 62 and the scraping arm 6. Structurally, referring to fig. 6, in the present embodiment, a plurality of scrapers 63 extending along the axial direction of the body 1 are provided on the scraper seat 62, two connecting rods 61 arranged at intervals are provided on one side of the scraper seat 62 away from the scrapers 63, and a limiting block 64 is provided at the free ends of the two connecting rods 61.

Corresponding to the two connecting rods, a containing groove is arranged at the free end of the scraping arm 6, and one end of each connecting rod with the limiting block 64 is slidably constrained in the containing groove. The second elastic members are springs respectively sleeved on the connecting rods 61. Because of the self elasticity of spring, can apply for the effort that scrapes blade holder 62 and keep away from scraper 63 arm to be convenient for scraper 63 adapts to different bucket butt on the inner wall of staving in the staving, realize scraping off of impurity on the inner wall, prevent simultaneously that scraper 63 blocks the phenomenon, conveniently in the course of the work, when the internal diameter of staving changes, scraper 63 can strike off impurity effectively, accomplishes corresponding work. The sudden jamming of the scraper blade 63 is greatly reduced by the presence of the spring.

As shown in fig. 2 and 3, the adjusting member 5 is disposed on the top of the body 1, and is generally cylindrical, an annular plate 52 is formed at an outward projection 195 of a bottom end edge of the adjusting member 5, an extending plate 54 is disposed on the annular plate 52 in a radially extending manner corresponding to each scraping arm 6, and the transmission member 53 is pivotally connected between a free end of the extending plate 54 and a top surface of the scraping arm 6.

In this embodiment, the driving member 4 is rotatably disposed on the main body 1 above the adjusting member 5, the driving member 4 is configured with an arc-shaped protrusion 195, the adjusting member 5 is provided with a groove 51 for inserting the protrusion 195, and when the driving member 4 is driven to rotate by the external operating force, the protrusion 195 pushes the adjusting member 5 to generate a movement away from the driving member 4.

In a specific structure, as shown in fig. 2 and 3, the driving member 4 is rotatably disposed on the body 1, the two arc-shaped protrusions 195 are symmetrically disposed on the driving member 4, and the two grooves 51 are oppositely disposed on the adjusting member 5. In order to facilitate the application of external force to the driving member 4, in the embodiment, two operating rods 41 are oppositely arranged on the driving member 4, when the external force operates the two operating rods 41 to rotate the driving member 4, the protrusion 195 will slowly disengage from the groove 51, so that the adjusting member 5 slides downwards and acts on the scraping arm 6 through the transmission member 53, and the scraping arm 6 pivots downwards, at this time, the torsion spring 8 is deformed by force and stores energy, thereby facilitating the placing of the scraping unit into the barrel. When the driving member 4 is rotated reversely, the adjusting member 5 is returned to the state where the protrusion 195 is received in the recess 51 by the torsion spring 8, and the scraping arm 6 is perpendicular to the axial direction of the body 1.

In addition, in the present embodiment, a plurality of mounting arms 7 are provided on the body 1 in a staggered arrangement with the respective scraping arms 6, and a second scraping portion is provided at a free end of each mounting arm 7. So as to form the scraping of the impurities on the inner wall of the barrel body together with the first scraping part. As shown in fig. 2 and 3 in combination, the mounting arm 7 in the present embodiment is located above the scraper arm 6 and is arranged alternately with the scraper arm 6. The second scraping portion includes a mounting rod 71 connected to the free end of the mounting arm 7, and a wire body 73 provided at the free end of the mounting rod 71, and the position of the mounting rod 71 relative to the mounting arm 7 is adjustable. So set up, be convenient for the second strike off the smooth entering into of portion the staving to adapt to the change of staving diameter and adjust, satisfy the demand of striking off.

In this embodiment, a mounting groove is formed at a free end of each mounting arm 7, one end of the mounting rod 71 is inserted into the mounting groove, a first connecting hole penetrating through the mounting groove is formed in the mounting arm 7, a plurality of second connecting holes are formed in the mounting rod 71 at intervals along the length direction of the mounting rod, and the mounting rod 71 is fastened and connected by a fastener penetrating through the first connecting hole and the corresponding second connecting hole. Of course, in this embodiment, the connection between the mounting rod 71 and the mounting arm 7 can also be referred to as the elastic connection between the scraping arm 6 and the connecting rod 61, and the effect of adjusting the position of the second scraping portion can be achieved.

As shown in fig. 2 and 3, a fixed rod 72 is rotatably connected to a free end of each mounting rod 71, the two ends of the fixed rod 72 are respectively provided with the steel wire body 73, the steel wire body 73 in the prior art can be used as the steel wire body 73, two ends of the fixed rod 72 are respectively wrapped with a sponge body, and the steel wire body 73 is wound outside the sponge body and abuts against the inner wall of the barrel body to realize secondary scraping of impurities in the barrel body. The steel wire body 73 is mature in product, convenient to install and replace and good in scraping effect.

As shown in fig. 1, 7 to 9, the telescopic ladder in this embodiment includes four ladder bodies, wherein each ladder body is sequentially sleeved and connected from outside to inside, and the cross-section of each ladder body is substantially u-shaped. Still be equipped with rolling element 10 between two adjacent ladders, for example, cylindrical roller bearing and slide bearing, wherein, the transmission between two adjacent ladders of cylindrical roller bearing is convenient for, does benefit to and converts sliding friction into rolling friction, and slide bearing's effect is the horizontal effort of buffering, reduces the influence that horizontal effort reciprocated to vertical direction to improve the effect of extension ladder when using.

For convenience of description, the ladders are respectively referred to as a first ladder 18, a second ladder 19, a third ladder 20 and a fourth ladder 22 from inside to outside in the present embodiment. Wherein, the top of the first ladder 18 is fixedly connected with the frame 9, and the top of the fourth ladder 22 is connected with the body 1. In this embodiment, the connecting plates 23 are connected between the two sides of each ladder body, and the arrangement of the connecting plates 23 is beneficial to preventing the problem that each ladder body deforms due to stress when the transverse force applied to the telescopic ladder during the working process is too large.

Because the height of this staving can reach 6m, the impurity that is located the internal top of staving is more loose, strikes off more easily, and along with striking off moving down of unit, the impurity on the bucket inner wall of cooling barrel is more durable, and impurity is difficult more to strike off. In the initial state, the ladders are stacked together and are stable, and impurities can be removed only by rotating the scrapers 63 and the steel wire bodies 73 along the inner wall. When scraping the unit and getting into in the staving to when gradually removing downwards, impurity is more and more durable, is difficult for scraping, all extends gradually between the every grade ladder body of extension ladder this moment, and the extension ladder can produce the vibration of certain frequency because the rotation of motor, scrapes the unit this moment and is not only rely on scraper 63 and the rotatory interior impurity of getting rid of staving of steel wire body 73, and the vibration of certain frequency also helps scraping the unit and gets rid of the impurity of staving. The vibration of a certain frequency, the scraper 63 and the steel wire body 73 act together to remove impurities in the barrel body.

In order to realize the telescopic adjustment function of the telescopic ladder, in the embodiment, driving mechanisms are respectively arranged between the first ladder body 18 and the second ladder body 19, between the second ladder body 19 and the third ladder body 20, and between the third ladder body 20 and the fourth ladder body 22. Due to the arrangement of the driving mechanism, the second ladder body 19 has a vertical movement with respect to the first ladder body 18, the third ladder body 20 with respect to the second ladder body 19, and the fourth ladder body 22 with respect to the third ladder body 20.

The driving mechanism in this embodiment includes a second motor 191 fixed to the top end of the second ladder 19, a third motor 201 fixedly provided to the top end of the third ladder 20, and a fourth motor 221 fixedly provided to the top end of the fourth ladder 22. The driving mechanism further comprises transmission pairs which are arranged between the first ladder body 18 and the second ladder body 19 in a matching mode, between the third ladder body 20 and the second ladder body 19 in a matching mode, and between the fourth ladder body 22 and the third ladder body 20 in a matching mode; the transmission pair is configured to transmit a rotational operation force from the motor to the ladder bodies arranged below to drive the fourth ladder body 22 to have a lifting motion in the vertical direction with respect to the third ladder body 20, the third ladder body 20 with respect to the second ladder body 19, and the second ladder body 19 with respect to the first ladder body 18.

With continued reference to fig. 7 to 9, the transmission pair in this embodiment includes a second rack 181 attached to the first ladder body 18 and extending along the length thereof, a second gear 193 mounted on the power output side of the second motor 191, a third rack 192 attached to the second ladder body 19 and extending along the length thereof, a third gear 202 mounted on the power output side of the third motor 201, a fourth rack 203 attached to the third ladder body 20 and extending along the length thereof, and a fourth gear 222 mounted on the power output side of the fourth motor 221.

As shown in fig. 9, the second rack 181 is disposed adjacent to one side of the first ladder body 18, a fourth mounting plate 194 is provided on the second ladder body 19, and the second motor 191 is mounted on the third mounting plate 11. Corresponding to the second rack 181, a protrusion 195 capable of covering the second rack 181 is formed on the second ladder body 19, and corresponding to the second gear 193, a second through hole for exposing at least a portion of the second rack 181 is formed on the protrusion 195, thereby facilitating the meshing transmission between the second gear 193 and the second rack 181. The transmission relationship between the third rack 192, the fourth rack 203 and the third gear 202 and the fourth gear 222 is the same as that between the second gear 193 and the second rack 181, and will not be described again.

The scraping device of the embodiment is beneficial to extending the scraping unit into different depths of the body 1 by arranging the telescopic ladder, so that impurities in the barrel body can be conveniently scraped; adjusting part 5 slides down when can through external operation power, and first portion of scraping draws close towards the middle part of body 1 to be convenient for strike off the smooth entering into of unit in the staving, and through the removal of external operation power, first elastic component orders about adjusting part 5 and resets, each strikes off arm 6 and keeps on body 1 with the state of perpendicular to body 1 axis, thereby be convenient for strike off the impurity on the staving inner wall at body 1 pivoted in-process. This scraping device's convenient operation, and can replace the manual work to strike off work, do benefit to the efficiency that improves to strike off, shorten the cycle of striking off, do benefit to the result of use that improves the staving.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A scraping device is arranged on a frame (9) and used for scraping impurities attached to the inner wall of a barrel body, and is characterized by comprising:

the telescopic ladder is telescopically arranged on the rack (9);

the body (1) is arranged on the extension ladder and can rotate relative to the extension ladder by receiving external rotation driving force;

the scraping units are arranged at intervals in the circumferential direction of the body (1), and each scraping unit comprises a scraping arm (6) with one end pivotally connected to the body (1) and a first scraping part arranged at the other end of each scraping arm (6) relative to the body (1);

the adjusting and maintaining mechanism comprises an adjusting piece (5) which is sleeved on the body (1) in a sliding manner and is positioned above each scraping arm (6), and a transmission piece (53) which is respectively connected between the adjusting piece (5) and each scraping arm (6) in a pivoting manner, wherein a first elastic piece which applies jacking force towards the direction of the adjusting piece (5) to each scraping arm (6) is arranged between the body (1) and each scraping arm (6);

when the adjusting piece (5) slides downwards due to the bearing of external operating force, the first scraping parts are close to the middle part of the body (1), and the first elastic piece stores energy; when the external operating force is relieved, the first elastic piece releases the energy storage to drive the adjusting piece (5) to reset, and each scraping arm (6) is kept on the body (1) in a state of being perpendicular to the axis of the body (1);

a driving piece (4) positioned above the adjusting piece (5) is rotatably arranged on the body (1), an arc-shaped bulge (195) is formed on the driving piece (4), a groove (51) for the bulge (195) to insert is formed in the adjusting piece (5), and when the driving piece (4) is driven to rotate by external operating force, the bulge (195) pushes the adjusting piece (5) to generate movement far away from the driving piece (4);

the adjusting piece (5) is sleeved on the top of the body (1), an annular plate (52) is formed at the bottom end of the adjusting piece (5) in an outward protruding mode, an extending plate (54) which extends along the radial direction of the annular plate (52) is arranged corresponding to each scraping arm (6), and the transmission piece (53) is connected between the free end of the extending plate (54) and the top surface of the scraping arm (6) in a pivoting mode.

2. The doctoring apparatus as claimed in claim 1, wherein: the first scraping part comprises a scraper seat (62) which is connected to the scraping arm (6) in a sliding mode and is provided with a plurality of scrapers (63), and a second elastic piece is connected between the scraper seat (62) and the scraping arm (6).

3. The doctoring apparatus as claimed in claim 1, wherein: the first elastic piece is connected with a torsion spring (8) on the scraping arm (6), and two ends of the torsion spring (8) are respectively connected between the scraping arm (6) and the body (1).

4. The doctoring apparatus as claimed in claim 1, wherein: a plurality of mounting arms (7) which are staggered with the scraping arms (6) are arranged on the body (1), and a second scraping part is arranged at the free end of each mounting arm (7).

5. The doctoring apparatus as claimed in claim 4, wherein: the second scraping part comprises a mounting rod (71) connected to the free end of the mounting arm (7), and a steel wire body (73) arranged at the free end of the mounting rod (71).

6. The scraping apparatus as claimed in any one of claims 1-5, wherein: the telescopic ladder is characterized in that the body (1) is installed at the bottommost end of the telescopic ladder, the telescopic ladder comprises at least two ladder bodies which are connected in a rolling mode and a driving mechanism arranged between every two adjacent ladder bodies, and the driving mechanism is arranged on the ladder bodies and arranged below the ladder bodies and arranged above the ladder bodies and moves in the vertical direction.

7. The doctoring apparatus as claimed in claim 6, wherein: each ladder body is U-shaped, and a connecting plate (23) is connected between two sides of each ladder body.

8. The doctoring apparatus as claimed in claim 6, wherein: the driving mechanism comprises a driving part arranged on one of the two adjacent ladder bodies and a transmission pair arranged between the two adjacent ladder bodies in a matching way; the transmission pair is configured to transmit a rotational operation force from the driving part from one of the ladder bodies to the other ladder body to urge the ladder body disposed below to have a lifting motion in a vertical direction with respect to the ladder body disposed above.

9. The doctoring apparatus as claimed in claim 8, wherein: the transmission pair comprises a rack fixedly connected to the ladder body arranged on the upper portion and a gear which follows the ladder body arranged on the lower portion and is in meshing transmission with the rack.