CN215618347U - Scraper turning device and slitter - Google Patents

Abstract

The utility model discloses a scraper turning device and a slitter, which relate to the technical field of sludge treatment and comprise a cleaning mechanism and a fixed seat, wherein the cleaning mechanism is movably arranged on the fixed seat through a rotating part; the cleaning mechanism comprises a scraper and a mounting plate, and the scraper is detachably mounted on the mounting plate through a connecting assembly; the mounting plate can be swung back and forth between a first position and a second position through the rotating piece to change the orientation of the connecting component. The mounting panel can be through rotating the piece and reciprocating pendulum commentaries on classics between primary importance and second place to change coupling assembling's orientation, make the position of connecting piece change for between circular knife or the slitter, let scraper and connecting piece turn to the position that is convenient for operating personnel carries out the dismouting to it, increase operating personnel's maneuverability space and visual degree. The scraper dismouting of being convenient for, the clearance scraper also need not to dismantle the scraper from the fixing base and gets off, shortens scraper dismouting clearance required time to improve the mud slitting treatment effeciency of slitter.

Description

Scraper turning device and slitter

Technical Field

The utility model relates to the technical field of sludge treatment, in particular to a scraper turnover device and a slitter.

Background

If a large amount of sludge generated in the production process of a sewage treatment plant is not properly treated and disposed, the environment is greatly damaged. In the past, the processes which are commonly adopted by people for sludge treatment are gravity concentration, natural drying or mechanical dehydration, and the final treatment of the sludge is only limited to sanitary landfill. With the development of economy and the improvement of living standard of people, people put forward higher requirements on environment, and the original sludge treatment and disposal method can not meet the requirements of environmental protection and sustainable development of social economy, so that the selection of a sludge treatment and disposal scheme suitable for the national conditions of China is necessary.

Sludge needs to utilize the sludge cutting machine to carry out slitting treatment before drying treatment, and the sludge after the treatment is the bar form, has effectively improved the drying efficiency of sludge. The scraper of current mud slitter is fixed on the scraper fixing base for clear away the rotatory in-process glutinous mud of circular knife, scraper fixing base unadjustable or rotation.

As the sludge contains more impurities like hair and the like, the impurities can be continuously accumulated on the scraper along with the continuous slitting of the sludge by the circular knife. After sundries are accumulated on the scraper, the cut strips are not formed. So need often clear up the debris of scraper, and the dismouting scraper is very difficult, because the stress surface leads to the scraper structure to be restricted between scraper and the circular knife for the coupling assembling position of installation scraper sets up the position and cuts with earth and bore, leads to the dismouting space restriction to make the dismouting process operation of scraper inconvenient.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the embodiment of the utility model is as follows: the utility model provides a scraper turning device for the coupling assembling of fixed scraper changes the orientation through rotating the piece, improves scraper clearance and dismouting efficiency, with the above-mentioned problem that exists among the solution prior art.

The second purpose of the embodiment of the utility model is: the utility model provides a slitter to improve mud slitting operating efficiency through the dismouting, the clearance efficiency that improve the scraper.

In order to achieve one of the purposes, the utility model adopts the following technical scheme:

on one hand, the scraper turnover device comprises a cleaning mechanism and a fixed seat, wherein the cleaning mechanism is movably arranged on the fixed seat through a rotating part; the cleaning mechanism comprises a scraper and a mounting plate, and the scraper is detachably mounted on the mounting plate through a connecting assembly; the mounting plate can be through the rotation piece is reciprocal pendulum rotation between primary importance and second place to change coupling assembling's orientation.

Furthermore, the cleaning device also comprises two circular knives which are oppositely arranged, and the cleaning mechanism is arranged at the lower parts of the circular knives; when the mounting plate is at the first position, the scraper is matched with the circular knife; when the mounting plate is in the second position, the scraper is separated from the circular knife, and the connecting assembly is positioned on one side of the mounting plate, which deviates from the circular knife.

Furthermore, the number of the cleaning mechanisms and the number of the rotating parts are two, and the two cleaning mechanisms are respectively and oppositely arranged on the fixed seat through the two rotating parts; a discharging gap is formed between the two cleaning mechanisms, the two cleaning mechanisms are respectively and correspondingly arranged at the lower parts of the two circular knives, and the discharging gap and the two circular knives are oppositely arranged.

Further, a buffer block is arranged on one side, away from the scraper, of the mounting plate; when the mounting plate is located at the second position, the buffer block abuts against the circular knife.

Furthermore, the rotating part comprises two bearings and shaft seats, the two shaft seats are oppositely arranged on the fixed seat, and the two bearings are respectively arranged in the two shaft seats; the two ends of the mounting plate are rotatably mounted on the two shaft seats through the two bearings respectively.

Furthermore, a driving mechanism is arranged between the mounting plate and the fixing seat, and the driving mechanism is used for driving the mounting plate to swing and rotate between a first position and a second position in a reciprocating manner.

Further, the mounting panel deviates from one side of scraper is provided with sticks up the pole, stick up the pole and be used for the drive the mounting panel is reciprocal between primary importance and second place and is swung and change.

Further, the fixing device comprises a positioning mechanism, wherein the positioning mechanism is arranged between the mounting plate and the fixing seat and is used for fixedly keeping the mounting plate at a first position.

Further, the positioning mechanism comprises a fixing plate, a rotating clamping block and a positioning bolt; the first end of the fixed plate is fixedly arranged on the fixed seat, and the second end of the fixed plate extends out of the fixed seat and forms a rotating gap for the fixed plate to rotate with the mounting plate; the rotating fixture block is movably arranged on the mounting plate, and can be selectively clamped into the rotating gap when the mounting plate is at the first position, so that the mounting plate is kept at the first position; a positioning hole communicated with the rotating gap penetrates through the second end of the fixing plate, the positioning hole is provided with the positioning bolt, and the positioning bolt can selectively extend into the rotating gap through the positioning hole and is matched with the rotating clamping block, so that the rotating clamping block is kept in the rotating gap.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

in another aspect, a slitter is provided comprising a blade flipping device as described above.

The utility model has the beneficial effects that: a scraper for clearing up circular knife surface debris passes through coupling assembling demountable installation on the mounting panel, the mounting panel can be through rotating the reciprocal pendulum commentaries on classics between primary importance and second place to change scraper and coupling assembling's orientation, make the position of scraper and coupling assembling change for taking place between circular knife or the slitter, let scraper and coupling assembling turn to the position that is convenient for operating personnel to clear up and dismouting it, increase operating personnel's maneuverability space and visual degree.

At the in-process of clearance scraper, only need to rotate the scraper to the second position and can clear up it, need not to dismantle the scraper, when the scraper needs to be changed or maintain, rotate the scraper to the second position to make coupling assembling arrange the position of the operating personnel dismouting of being convenient for in, with the problem of solving dismouting, clearance scraper difficulty, shorten scraper dismouting clearance required time greatly, thereby improve the mud slitting treatment effeciency of slitter.

Drawings

The utility model is explained in more detail below with reference to the figures and examples.

Fig. 1 is a schematic view of an overall structure of a scraper turnover device and a slitter according to an embodiment of the present invention;

fig. 2 is one of the overall structural schematic diagrams of the scraper turning device according to the embodiment of the utility model;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a second schematic structural diagram of the overall structure of the scraper turning device according to the embodiment of the present invention;

FIG. 5 is an enlarged view of the portion B of FIG. 4;

fig. 6 is a bottom view of a blade turnover device according to an embodiment of the present invention;

fig. 7 is a top view of a blade turnover device according to an embodiment of the present invention.

In the figure: 10. a cleaning mechanism; 11. a scraper; 12. mounting a plate; 13. a connecting assembly; 131. pressing a plate; 132. fixing the bolt; 14. a discharge gap; 15. a buffer block; 20. a fixed seat; 30. a rotating member; 31. a bearing; 32. a shaft seat; 40. a circular knife; 50. a positioning mechanism; 51. a fixing plate; 52. rotating the fixture block; 53. positioning the bolt; 54. the gap is rotated.

Detailed Description

In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention are described in further detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-7, the present embodiment provides a scraper turning device, which is used for being installed on a sludge slitter and can improve the sludge slitter treatment efficiency of the slitter, and includes a cleaning mechanism 10 for cleaning residual adhered sludge on the slitter and a fixing seat 20 for supporting the fixing cleaning mechanism 10, wherein the cleaning mechanism 10 is movably installed on the fixing seat 20 through a rotating member 30.

In this embodiment, the fixing base 20 is a frame structure, an opening for the sludge to pass through after being sliced is formed in the middle of the fixing base 20, and the cleaning mechanism 10 is erected on the fixing base 20 and placed on the opening, generally speaking, the circular knife 40 for slicing the sludge is arranged in the middle of the fixing base 20, so that the strip-shaped sludge can accurately fall from the opening.

Specifically, the cleaning mechanism 10 includes a scraper 11 for cleaning debris on the circular knife 40 and a mounting plate 12 for fixing the scraper 11, the scraper 11 is detachably mounted on the mounting plate 12 through a connecting assembly 13, the mounting plate 12 can be swung back and forth between a first position and a second position through a rotating member 30 to change the orientation of the connecting assembly 13, the scraper 11 for cleaning debris on the surface of the circular knife 40 is detachably mounted on the mounting plate 12 through the connecting assembly 13 to change the orientation of the connecting assembly 13, so that the positions of the scraper 11 and the connecting assembly 13 are changed relative to the circular knife 40 or the slitter, the scraper 11 and the connecting assembly are turned to positions convenient for an operator to disassemble and assemble the scraper, in the process of cleaning the scraper 11, the scraper 11 can be cleaned only by rotating the scraper 11 to the second position without disassembling the scraper 11, when the scraper 11 needs to be replaced or maintained, the scraper blade 11 is rotated to the second position, thereby placing the connecting assembly 13 in a position that is convenient for the operator to mount and dismount, to increase the operability space and the degree of visualization for the operator. The problem of 11 difficulties of dismouting, clearance scraper is solved, 11 dismouting clearance required times of scraper are shortened greatly to improve the mud slitting treatment effeciency of slitter.

In this embodiment, the connecting assembly 13 includes a pressing plate 131 and a fixing bolt 132, a plurality of threaded holes for screwing with the fixing bolt 132 are formed in the mounting plate 12 along the length direction thereof, a plurality of fixing grooves are formed in the scraper 11, a plurality of through holes corresponding to the threaded holes are also formed in the pressing plate 131, and the pressing plate 131 presses and fixes the scraper 11 on the mounting plate 12 through the screw head of the fixing bolt 132.

In this embodiment, the rotating members 30 are respectively disposed on the two opposite sides of the opening of the fixing base 20, and the extension length of the mounting plate 12 needs to be greater than the opening, so that the mounting plate 12 is connected to the rotating members 30 at the two ends of the opening. The extending direction of scraper 11 is unanimous with the extending direction of mounting panel 12, and the rotation axis of mounting panel 12 is also parallel to each other with the length direction of mounting panel 12, so that mounting panel 12 is at the rotation in-process, scraper 11 is unified to be driven and is kept away from circular knife 40 or is close to circular knife 40, and be used for the unified orientation that changes of coupling assembling 13 of installation scraper 11, the unified dismouting of being convenient for, in order to further be convenient for the dismouting of scraper 11, scraper 11 can be the polylith, polylith scraper 11 is installed side by side along the length direction of mounting panel 12 in proper order, all be connected through coupling assembling 13 between each scraper 11 and the mounting panel 12, and scraper 11 also can be many again with the formation of installing in proper order of strip comb along mounting panel 12 length direction, the actual demand of the structure of slitter and equipment is looked into to the concrete setting mode.

The scraper turning device and the slitter further comprise two circular knives 40 which are arranged oppositely, and the cleaning mechanism 10 is arranged at the lower parts of the circular knives 40 and selectively matched with the circular knives 40 through the rotating part 30.

When the mounting plate 12 is at the first position, the scraper 11 is matched with the circular knife 40, and when the circular knife 40 rotates, the scraper 11 can scrape and clean residual mud and sundries on the surface of the circular knife 40; when the mounting plate 12 is in the second position, the scraper 11 is separated from the circular knife 40, and the connecting assembly 13 is located on one side of the mounting plate 12, which is away from the circular knife 40, so that the scraper 11 is convenient to clean and disassemble, the connecting assembly 13 is located on one side of the mounting plate 12, which is away from the circular knife 40, so that a larger operating space can be provided for an operator, and the operator can clearly see the state of the connecting assembly 13 when the scraper 11 is disassembled and assembled, thereby improving the cleaning and disassembling efficiency of the scraper 11.

In this embodiment, every circular knife 40 surface is provided with a plurality of recesses, the recess phase-match of two circular knives 40 to carry out the slitting to the mud that gets into from the upside of two circular knives 40, obtain along the mud strip of vertical direction extension, the mud strip can fall into in mud collection equipment or the drying equipment through the opening of seting up on the fixing base 20.

The circular knives 40 can be driven by a speed reducing motor, an output shaft of the speed reducing motor is connected with one circular knife 40, and the circular knives 40 are driven by a transmission gear to rotate synchronously and oppositely.

The scraper 11 is formed with a plurality of comb-like pieces matching the shape of the grooves of the circular knives 40, and the plurality of comb-like pieces are matched with the two circular knives 40 to enable hairs and/or residual mud to be accumulated on the plurality of comb-like pieces or scraped off when the circular knives 40 rotate.

Further, clearance mechanism 10 and rotation piece 30 are two, two clearance mechanisms 10 are respectively through two rotation pieces 30 relative mounting on fixing base 20, be formed with ejection of compact clearance 14 between two clearance mechanisms 10, two clearance mechanisms 10 correspond the lower part that sets up at two circular knives 40 respectively, two clearance mechanisms 10 are used for clearing up the incomplete mud on two circular knives 40 surfaces respectively, and in the overlooking direction of slitter, set up relatively between ejection of compact clearance 14 and two circular knives 40, guarantee that the bar mud behind the circular knife 40 slitting can fall the opening part through ejection of compact clearance 14, or the mud that the scraper 11 hung and fell can be followed the opening part and dropped.

In order to prevent the mounting plate 12 from crashing the circular knife 40 during the rotation process of the cleaning mechanism 10, a buffer block 15 is arranged on one side of the mounting plate 12 away from the scraper 11, when the mounting plate 12 is in the second position, the buffer block 15 is abutted against the circular knife 40, the rotation angles of the first position and the second position of the mounting plate 12 are preferably 180 degrees, therefore, when the mounting plate 12 is in the first position, the scraper 11 is positioned on the upper portion of the mounting plate 12, namely one side of the mounting plate 12 close to the circular knife 40, and in this state, the buffer block 15 is positioned on the lower portion of the mounting plate 12, namely one side of the mounting plate 12 far away from the circular knife 40, when the mounting plate 12 is rotated from the first position to the second position and is kept in the second position, the positions of the scraper 11 and the buffer block 15 are changed, the scraper 11 is positioned on one side of the mounting plate 12 far away from the circular knife 40, and the buffer block 15 is positioned on one side of the mounting plate 12 close to the circular knife 40 and abutted against the surface of the circular knife 40, further, in order to protect the circular knife 40 and the cleaning mechanism 10, the buffer block 15 is preferably made of a material having elastic restoring performance, and when the scraper 11 is detached and cleaned, the scraper 11 is remounted on the mounting plate 12 and the mounting plate 12 is rotated to the first position again, so that the scraper 11 can be matched with the circular knife 40 again.

Preferably, the rotating member 30 includes two bearings 31 and a shaft seat 32, the two shaft seats 32 are oppositely disposed on the fixing seat 20, the two bearings 31 are respectively disposed in the two shaft seats 32, and two ends of the mounting plate 12 are respectively rotatably mounted on the two shaft seats 32 through the two bearings 31, so that the mounting plate 12 can rotate more stably, and the mounting plate 12 can be ensured to have no axial play.

Mounting panel 12 accessible multiple mode drives it, thereby let mounting panel 12 switch between primary importance and second place, be provided with actuating mechanism between mounting panel 12 and fixing base 20, actuating mechanism is used for driving mounting panel 12 and reciprocates between primary importance and second place and changes, actuating mechanism includes but not limited to motor, the cylinder, under actuating mechanism is the condition of motor, the casing of motor can be fixed on fixing base 20, the pivot and the mounting panel 12 of motor are connected, thereby the pivot through the motor drives mounting panel 12 and rotates on the rotating member. Under the condition that the driving mechanism is the air cylinder, the air cylinder can be a piston type air cylinder, the cylinder body of the air cylinder can be fixed on the fixing seat 20, the piston rod of the air cylinder can be connected with the mounting plate 12 through a mechanical transmission mechanism such as a crank mechanism and the like, swing and rotation of the mounting plate 12 are achieved, the air cylinder can also be a rotary air cylinder, and the mounting plate 12 is driven to rotate through the rotating shaft of the air cylinder.

In addition, in order to reduce the cost, the mounting plate 12 can be driven to swing in a manual mode, a tilting rod is arranged on one side, away from the scraper 11, of the mounting plate 12, and the tilting rod is used for driving the mounting plate 12 to swing back and forth between the first position and the second position.

In this embodiment, the shaft seat 32 may further be provided with a tool seat for supporting the circular tool 40.

The scheme further comprises a positioning mechanism 50, wherein the positioning mechanism 50 is arranged between the mounting plate 12 and the fixing seat 20 and is used for fixedly keeping the mounting plate 12 at the first position.

The positioning mechanism 50 comprises a fixing plate 51, a rotating fixture block 52 and a positioning bolt 53; a first end of the fixed plate 51 is fixedly installed on the fixed seat 20, and a second end of the fixed plate 51 extends out of the fixed seat 20 and forms a rotating gap 54 with the mounting plate 12 for rotation; the rotary fixture 52 is movably mounted on the mounting plate 12, and the rotary fixture 52 can be selectively clamped into the rotary gap 54 when the mounting plate 12 is at the first position, so that the mounting plate 12 is maintained at the first position; a positioning hole communicated with the rotating gap 54 is formed through the second end of the fixing plate 51, the positioning hole is provided with a positioning bolt 53, and the positioning bolt 53 can selectively extend into the rotating gap 54 through the positioning hole and is matched with the rotating latch 52, so that the rotating latch 52 is kept in the rotating gap 54.

The rotating latch 52 is further provided with a positioning groove which can be abutted and matched with the end of the positioning bolt 53, when the rotating latch 52 is clamped in the rotating gap 54, the positioning groove and the positioning hole are arranged oppositely, so that the positioning bolt 53 can be clamped in the positioning groove after extending into the rotating gap 54. In addition, in order to facilitate the rotation of the rotation latch 52 to be locked in the rotation gap 54, the side of the rotation latch 52 that first rotates into the rotation gap 54 forms a slope structure, so that the height of the side of the rotation latch 52 that first rotates into the rotation gap 54 is slightly lower than the overall height of the rotation latch 52, and the interference between the edge of the rotation latch 52 and the fixing plate 51 is avoided.

A slitter comprising a blade turning device as described above.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, configuration, and operation in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A scraper blade turning device is characterized by comprising:

the cleaning device comprises a cleaning mechanism (10) and a fixed seat (20), wherein the cleaning mechanism (10) is movably arranged on the fixed seat (20) through a rotating part (30);

the cleaning mechanism (10) comprises a scraper (11) and a mounting plate (12), wherein the scraper (11) is detachably mounted on the mounting plate (12) through a connecting assembly (13);

the mounting plate (12) is capable of swinging back and forth between a first position and a second position by the rotating member (30) to change the orientation of the connecting assembly (13).

2. The blade turning device according to claim 1, further comprising two oppositely arranged circular blades (40), wherein the cleaning mechanism (10) is arranged at the lower part of the circular blades (40);

when the mounting plate (12) is in a first position, the scraper (11) is matched with the circular knife (40); when the mounting plate (12) is in the second position, the scraper (11) is separated from the circular knife (40), and the connecting assembly (13) is located on the side of the mounting plate (12) facing away from the circular knife (40).

3. The blade turning device according to claim 2, characterized in that the cleaning mechanism (10) and the rotating member (30) are two, and the two cleaning mechanisms (10) are respectively oppositely mounted on the fixed base (20) through the two rotating members (30);

a discharging gap (14) is formed between the two cleaning mechanisms (10), the two cleaning mechanisms (10) are respectively and correspondingly arranged at the lower parts of the two circular knives (40), and the discharging gap (14) and the two circular knives (40) are oppositely arranged.

4. A doctor blade turning device according to claim 2 or 3, characterised in that the side of the mounting plate (12) facing away from the doctor blade (11) is provided with a buffer block (15);

when the mounting plate (12) is at the second position, the buffer block (15) is abutted against the circular knife (40).

5. A blade turning device according to any one of claims 1-3, characterized in that the rotating member (30) comprises two bearings (31) and a shaft seat (32), the two shaft seats (32) are oppositely arranged on the fixed base (20), and the two bearings (31) are respectively arranged in the two shaft seats (32);

two ends of the mounting plate (12) are respectively and rotatably mounted on the two shaft seats (32) through the two bearings (31).

6. A doctor blade turning device according to claim 5, characterized in that a driving mechanism is arranged between the mounting plate (12) and the holder (20) for driving the mounting plate (12) to swing back and forth between the first and second positions.

7. The scraper turning device of claim 5, characterized in that a tilting rod is arranged on a side of the mounting plate (12) facing away from the scraper (11), and the tilting rod is used for driving the mounting plate (12) to swing back and forth between the first position and the second position.

8. The doctor blade flipping arrangement according to claim 5, further comprising a positioning mechanism (50), the positioning mechanism (50) being arranged between the mounting plate (12) and the holder (20) for fixedly holding the mounting plate (12) in the first position.

9. The doctor blade flipping device according to claim 8, wherein the positioning mechanism (50) comprises a fixing plate (51), a rotation block (52) and a positioning bolt (53);

the first end of the fixed plate (51) is fixedly arranged on the fixed seat (20), and the second end of the fixed plate (51) extends out of the fixed seat (20) and forms a rotating gap (54) for the fixed plate to rotate with the mounting plate (12); the rotating fixture block (52) is movably mounted on the mounting plate (12), and the rotating fixture block (52) can be selectively clamped into the rotating gap (54) when the mounting plate (12) is at the first position, so that the mounting plate (12) is kept at the first position; a positioning hole communicated with the rotating gap (54) penetrates through the second end of the fixing plate (51), the positioning hole is provided with the positioning bolt (53), and the positioning bolt (53) can selectively extend into the rotating gap (54) through the positioning hole and is matched with the rotating fixture block (52) so that the rotating fixture block (52) is kept in the rotating gap (54).

10. A slitter, comprising:

a blade turnover device as claimed in any one of claims 1-9.

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