CN216910199U

CN216910199U - Raw and other materials compounding device of vitrified grinding wheel production usefulness

Info

Publication number: CN216910199U
Application number: CN202220117424.6U
Authority: CN
Inventors: 徐红波
Original assignee: Nantong Shangdong Abrasive Tools Co ltd
Current assignee: Nantong Shangdong Abrasive Tools Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-07-08
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to the technical field of ceramic grinding wheels, in particular to a raw material mixing device for producing a ceramic grinding wheel, which comprises a stirring barrel, a barrel cover arranged above the stirring barrel, a servo motor fixedly arranged at the top of the barrel cover, a rotating shaft connected with the output end of the servo motor, a supporting rod fixedly arranged at the bottom end of the rotating shaft, a discharge hole arranged at the bottom of the stirring barrel, a metering mechanism, a sealing mechanism, a threaded sleeve and a scraping mechanism, wherein the raw material mixing device is provided with a feeding anti-blocking mechanism and the metering mechanism, pushes a label sleeve to drive a movable hook and a movable block to be fixedly arranged at one side of the outer wall of a feeding hopper, and then places a graduated scale inside the label sleeve, so that the amount of the raw materials inside the feeding hopper can be more conveniently observed, the raw materials can be more well proportioned, errors are reduced, and meanwhile, the label sleeve can more conveniently protect the graduated scale, prevent to use the scale for a long time and produce wearing and tearing, influence subsequent use, open the electric lift loop bar after the raw materials adds the completion and make electric lift loop bar rebound.

Description

Raw and other materials compounding device of vitrified grinding wheel production usefulness

Technical Field

The utility model relates to the technical field of ceramic grinding wheels, in particular to a raw material mixing device for ceramic grinding wheel production.

Background

According to different classifications of binding agents, common ceramic grinding wheels, resin grinding wheels and rubber grinding wheels are used, the grinding wheels are the most important grinding tools in grinding processing, the grinding wheels are porous bodies prepared by adding the binding agents into grinding materials, compacting, drying and roasting, and because the grinding materials, the binding agents and manufacturing processes are different, the characteristics of the grinding wheels are very different, so that the grinding wheels have important influences on the processing quality, the production rate and the economy of grinding.

In the prior art, the following problems exist:

(1) present raw materials compounding device needs the manual work to carry out the material loading when using, and the ratio of the assurance raw materials that can't be better, and artifical the interpolation can produce great error, produces easily when the feeding simultaneously and blocks up, influences the speed of material loading, and it is convenient inadequately to use.

(2) The raw materials to the agitator inner wall that current raw materials compounding device can't be better when using carries out better scraping and gets, and the raw materials is attached to the agitator inner wall easily, needs the manual work to scrape and gets, and it is convenient inadequately to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a raw material mixing device for producing a ceramic grinding wheel, which aims to solve the problems in the background technology.

The technical scheme of the utility model is as follows: a raw material mixing device for producing a ceramic grinding wheel comprises a stirring barrel, a barrel cover arranged above the stirring barrel, a servo motor fixedly arranged at the top of the barrel cover, a rotating shaft connected with the output end of the servo motor, a supporting rod fixedly arranged at the bottom end of the rotating shaft, and a discharge hole arranged at the bottom of the stirring barrel, and further comprises a metering mechanism, a sealing mechanism, a thread sleeve, a scraping mechanism, two fixing sleeves and two feeding anti-blocking mechanisms, wherein the two feeding anti-blocking mechanisms penetrate through two sides of the outer wall of the stirring barrel and comprise a feeding hopper, a mounting groove arranged at one side of the bottom of the feeding hopper, an electric lifting sleeve rod fixedly arranged in the mounting groove, and a movable bottom plate fixedly arranged at the telescopic end of the electric lifting sleeve rod, the movable bottom plate is hinged with the feeding hopper, the metering mechanism is arranged at one side of the outer wall of the feeding hopper, and the two fixing sleeves are fixedly arranged on the outer wall of the supporting rod, two the equal fixed mounting in fixed cover both sides has two rabbling mechanisms, sealing mechanism sets up at the bung outer wall, the thread bush sets up at the discharge gate inner wall, the inboard cooperation of thread bush installs the screw thread stopper, scrape and get the mechanism setting in agitator inner wall bottom.

Preferably, two stifled mechanism is prevented in feeding still includes inlet pipe, fixing bolt, mounting panel, vibrating motor, connecting rod and vibrating mass respectively, the inlet pipe runs through to be installed in agitator outer wall one side, the mounting panel passes through fixing bolt and agitator fixed mounting, vibrating motor fixed mounting is at the mounting panel top, the connecting rod is installed at the vibrating motor output, vibrating mass fixed mounting is in connecting rod one end, the vibrating mass contacts with the inlet pipe.

Preferably, metering mechanism includes label sleeve, scale, a plurality of movable block, a plurality of movable mounting are at the inboard fly hook of a plurality of movable blocks, and are a plurality of the equal fixed mounting of movable block is in feeder hopper outer wall both sides, label sleeve fixed mounting is in a plurality of fly hooks one side, the scale is placed inside the label sleeve.

Preferably, rabbling mechanism includes first link block, carousel, second connecting block, jack, dead lever, stirring leaf, flexible cover, scrapes strip and a plurality of fixed mounting at the inside first fixed block of flexible cover, every first fixed block all is connected with a expanding spring between scraping the strip, first link block fixed mounting is in fixed cover one side, the carousel is installed in first link block one side, second connecting block fixed mounting is in carousel one side, the jack is seted up in second connecting block outer wall one side, the dead lever runs through with the jack inboard, stirring leaf fixed mounting is in second connecting block one side, flexible cover fixed mounting is in stirring leaf one end.

Preferably, the sealing mechanism comprises a hinge, a sealing block, a limiting rod and a limiting hole, the hinge is installed on one side of the outer wall of the barrel cover, the sealing block is hinged to one side of the outer wall of the barrel cover through the hinge, the limiting rod is fixedly installed on one side of the inner wall of the sealing block, the limiting hole is formed in the outer wall of the stirring barrel, and the limiting rod is matched with the limiting hole.

Preferably, scrape and get mechanism and include that two installation pieces, two install respectively at the electric rotatory piece of two installation piece one sides, two fixed mounting are at the second fixed block of electric rotatory piece one side, two seting up respectively in the draw-in groove of second fixed block one side, the cooperation is installed at the inboard fixture block of draw-in groove and two fixed mounting are at the scraper blade of fixture block one side.

The utility model provides a raw material mixing device for producing a ceramic grinding wheel by improvement, and compared with the prior art, the raw material mixing device has the following improvements and advantages:

one is as follows: the utility model has the advantages that the feeding anti-blocking mechanism and the metering mechanism are arranged, the label sleeve is pushed to drive the movable hook and the movable block to be fixedly arranged at one side of the outer wall of the feeding hopper, the graduated scale is placed in the label sleeve, the amount of the raw materials in the feeding hopper can be more conveniently observed, so that the raw materials can be better proportioned, errors are reduced, meanwhile, the label sleeve can more conveniently protect the graduated scale, the graduated scale is prevented from being worn and damaged after long-time use, the subsequent use is influenced, when the raw materials are added, the electric lifting sleeve rod is opened to enable the electric lifting sleeve rod to move upwards, one side of the movable bottom plate is driven to move upwards, the other side of the movable bottom plate is provided with the pin shaft, one side of the movable bottom plate is driven to rotate, the movable bottom plate is in a slope shape, the feeding can be more automatically carried out, the manual adding is not needed, and the use is more convenient and fast, the feeding is more thorough, the vibrating motor is turned on to drive the vibrating block to vibrate, and the vibrating block is contacted with the feeding pipe, so that the vibrating block drives the feeding pipe to vibrate, the raw material can be more conveniently prevented from being blocked in the feeding pipe, the raw material is prevented from entering the barrel, the feeding is smoother, and the use efficiency of the device is improved;

the second step is as follows: according to the utility model, the first connecting block, the rotary disc, the second connecting block, the jack, the fixed rod, the stirring blade, the telescopic sleeve, the first fixed block, the telescopic spring and the scraping strip are arranged, the stirring blade is rotated to drive the rotary disc to rotate, the scraping strip at one end of the stirring blade is rotated to an inclined angle, the fixed rod is inserted into the jack and fixed on the rotary disc, the angle of the stirring blade can be adjusted more conveniently, the stirring blade is rotated and stirred again, raw materials on the inner wall of the stirring barrel are scraped downwards, the discharging is more convenient, the rotary shaft is opened to drive the stirring blade to rotate, the scraping strip is abutted against the barrel wall, and the telescopic spring moves back and forth to drive the scraping strip to be always attached to the inner wall of the stirring barrel, so that the scraping is more complete, the use is more convenient and rapid, and the use effect of the device is greatly improved.

Drawings

The utility model is further explained below with reference to the figures and examples:

FIG. 1 is a schematic cross-sectional structural view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of the stirring mechanism of the present invention;

FIG. 4 is a schematic structural view of a feed anti-clogging mechanism of the present invention;

FIG. 5 is an enlarged schematic view of the utility model at A in FIG. 1;

description of reference numerals: 1. a stirring barrel; 2. a feed anti-blocking mechanism; 21. a feed pipe; 22. a feed hopper; 23. mounting grooves; 24. an electric lifting loop bar; 25. a movable bottom plate; 26. a pin shaft; 27. fixing the bolt; 28. mounting a plate; 29. a vibration motor; 210. a connecting rod; 211. vibrating the block; 3. a metering mechanism; 31. a movable block; 32. a movable hook; 33. a label cover; 34. a graduated scale; 4. a barrel cover; 5. a servo motor; 6. a rotating shaft; 7. a support bar; 8. fixing a sleeve; 9. a stirring mechanism; 91. a first connection block; 92. a turntable; 93. a second connecting block; 94. a jack; 95. fixing the rod; 96. stirring blades; 97. a telescopic sleeve; 98. a first fixed block; 99. a tension spring; 910. scraping the strips; 10. a sealing mechanism; 101. a hinge; 102. a sealing block; 103. a limiting rod; 104. a limiting hole; 11. a discharge port; 12. a threaded sleeve; 13. a threaded plug; 14. a scraping mechanism; 141. mounting blocks; 142. an electric rotating block; 143. a second fixed block; 144. a card slot; 145. a clamping block; 146. a scraper.

Detailed Description

The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

The first embodiment is as follows:

the utility model provides a raw material mixing device for producing a ceramic grinding wheel by improvement, and the technical scheme of the utility model is as follows: comprises a stirring barrel 1, a barrel cover 4 arranged above the stirring barrel 1, a servo motor 5 fixedly arranged at the top of the barrel cover 4, a rotating shaft 6 connected with the output end of the servo motor 5, a support rod 7 fixedly arranged at the bottom end of the rotating shaft 6 and a discharge hole 11 arranged at the bottom of the stirring barrel 1, a metering mechanism 3, a sealing mechanism 10, a thread bush 12, a scraping mechanism 14, two fixed sleeves 8 and two feeding anti-blocking mechanisms 2, wherein the two feeding anti-blocking mechanisms 2 are arranged at two sides of the outer wall of the stirring barrel 1 in a penetrating way, the two feeding anti-blocking mechanisms 2 comprise a feeding hopper 22, a mounting groove 23 arranged at one side of the bottom of the feeding hopper 22, an electric lifting sleeve rod 24 fixedly arranged in the mounting groove 23, a movable bottom plate 25 fixedly arranged at the telescopic end of the electric lifting sleeve rod 24, the movable bottom plate 25 is hinged with the feeding hopper 22, the metering mechanism 3 is arranged at one side of the outer wall of the feeding hopper 22, the two fixed sleeves 8 are fixedly arranged at the outer wall of the support rod 7, two stirring mechanisms 9 are fixedly mounted on two sides of the two fixing sleeves 8, the sealing mechanism 10 is arranged on the outer wall of the barrel cover 4, the threaded sleeve 12 is arranged on the inner wall of the discharge port 11, the threaded plug 13 is mounted on the inner side of the threaded sleeve 12 in a matched mode, and the scraping mechanism 14 is arranged at the bottom of the inner wall of the stirring barrel 1.

The above-described specific embodiment: open electric lift loop bar 24 and make electric lift loop bar 24 rebound after the raw materials interpolation is accomplished, drive movable bottom plate 25 one side rebound, round pin axle 26 is installed to movable bottom plate 25 opposite side, drives movable bottom plate 25 one side rotation to make movable bottom plate 25 present slope form, can be more automatic carry out the material loading, need not manual interpolation, use more convenient quick, material loading is also more thorough.

Specifically, two feeding anti-blocking mechanisms 2 still include inlet pipe 21 respectively, fixing bolt 27, mounting panel 28, vibrating motor 29, connecting rod 210 and vibrating mass 211, inlet pipe 21 runs through and installs in 1 outer wall one side of agitator, mounting panel 28 passes through fixing

bolt

27 and 1 fixed mounting of agitator, vibrating motor 29 fixed mounting is at mounting panel 28 top, connecting rod 210 is installed at vibrating motor 29 output, vibrating mass 211 fixed mounting is in connecting rod 210 one end, vibrating mass 211 contacts with inlet pipe 21, through being provided with fixing bolt 27, mounting panel 28, vibrating motor 29, connecting rod 210 and vibrating mass 211, make vibrating mass 211 drive inlet pipe 21 shake, can be convenient for more prevent that the raw materials from producing the jam in inlet pipe 21 inside, influence in the raw materials gets into the bucket, make the feeding more smooth and easy, hoisting device's availability factor.

Specifically, metering mechanism 3 includes label cover 33, scale 34, a plurality of movable block 31, a plurality of movable mounting are at the inboard activity hook 32 of a plurality of movable block 31, the equal fixed mounting of a plurality of movable block 31 is in feeder hopper 22 outer wall both sides, label cover 33 fixed mounting is in a plurality of activity hook 32 one sides, scale 34 is placed inside label cover 33, through being provided with movable block 31, activity hook 32, label cover 33 and scale 34, can be more convenient for observe what of the inside raw materials of feeder hopper 22, so that better carry out the ratio to the raw materials, reduce the error, label cover 33 can be more convenient for protect scale 34 simultaneously, prevent that long-time use scale 34 from producing wearing and tearing, influence subsequent use.

Specifically, the stirring mechanism 9 includes a first connecting block 91, a rotating disk 92, a second connecting block 93, a jack 94, a fixing rod 95, a stirring blade 96, a telescopic sleeve 97, a scraping strip 910 and a plurality of first fixing blocks 98 fixedly mounted inside the telescopic sleeve 97, a telescopic spring 99 is connected between each first fixing block 98 and the scraping strip 910, the first connecting block 91 is fixedly mounted on one side of the fixing sleeve 8, the rotating disk 92 is mounted on one side of the first connecting block 91, the second connecting block 93 is fixedly mounted on one side of the rotating disk 92, the jack 94 is formed on one side of the outer wall of the second connecting block 93, the fixing rod 95 penetrates through the inner side of the jack 94, the stirring blade 96 is fixedly mounted on one side of the second connecting block 93, the telescopic sleeve 97 is fixedly mounted at one end of the stirring blade 96, and the first connecting block 91, the rotating disk 92, the second connecting block 93, the jack 94, the fixing rod 95, the stirring blade 96, the telescopic sleeve 97 and the first fixing block 98, Expanding spring 99 with scrape strip 910, can be more convenient for adjust the angle of stirring leaf 96, scrape the raw materials of 1 inner wall of agitator downwards when making stirring leaf 96 rotate the stirring again and get, be more convenient for carry out the unloading, it makes pivot 6 drive stirring leaf 96 rotate to open the pivot again, it is inconsistent with the bucket wall to scrape strip 910 simultaneously, expanding spring 99 round trip movement drives to scrape strip 910 and hug closely all the time with 1 inner wall of agitator, make and scrape and get more right abundant, it is more convenient to use.

Specifically, sealing mechanism 10 includes hinge 101, sealed piece 102, gag lever post 103 and spacing hole 104, hinge 101 is installed in 4 outer wall one sides of bung, sealed piece 102 is articulated through

hinge

101 and 4 outer wall one sides of bung, gag lever post 103 fixed mounting is in sealed piece 102 inner wall one side, spacing hole 104 is seted up at 1 outer wall of agitator, gag lever post 103 and spacing hole 104 phase-match, through being provided with hinge 101, sealed piece 102, gag lever post 103 and spacing hole 104, can be convenient for carry out fixed seal between agitator 1 and the bung 4 more, prevent to produce when mixing to rock and lead to producing between agitator 1 and the bung 4 and drop, influence subsequent use.

Specifically, scrape and get mechanism 14 and include two installation pieces 141, two install respectively at the electric rotatory piece 142 of two installation pieces 141 one sides, two fixed mounting are at the second fixed block 143 of electric rotatory piece 142 one side, two setups respectively in the draw-in groove 144 of second fixed block 143 one side, the cooperation is installed at the inboard fixture block 145 of draw-in groove 144 and two fixed mounting are at the scraper blade 146 of fixture block 145 one side, through being provided with installation piece 141, electric rotatory piece 142, second fixed block 143, draw-in groove 144, fixture block 145 and scraper blade 146, can be convenient for scrape the raw materials of agitator 1 bottom when the unloading more, be convenient for make the unloading more thorough, need not artifical manual the clearance, it is more convenient to use, the work efficiency of hoisting device.

The working principle is as follows: firstly, an external power supply is switched on, the label sleeve 33 is pushed to enable the label sleeve 33 to drive the movable hook 32 and the movable block 31 to be fixedly arranged on one side of the outer wall of the feed hopper 22, the graduated scale 34 is placed in the label sleeve 33, the electric lifting sleeve rod 24 is opened to enable the electric lifting sleeve rod 24 to move upwards after the raw material is added, one side of the movable bottom plate 25 is driven to move upwards, the other side of the movable bottom plate 25 is provided with the pin shaft 26 to drive one side of the movable bottom plate 25 to rotate, the movable bottom plate 25 is in a slope shape, the vibration motor 29 is started to enable the vibration motor 29 to drive the vibration block 211 to vibrate, the vibration block 211 is contacted with the feed pipe 21, the vibration block 211 drives the feed pipe 21 to vibrate, the raw material can be prevented from being blocked in the feed pipe 21 more conveniently, then the stirring blade 96 is rotated to enable the stirring blade 96 to drive the rotary table 92 to rotate, and the scraping strip 910 at one end of the stirring blade 96 is rotated to an inclination angle, insert the dead lever 95 again inside jack 94, fix carousel 92, fix bung 4 in 1 top of agitator, again pull sealed piece 102 and make sealed piece 102 drive hinge 101 rotatory downwards, make gag lever post 103 insert inside spacing hole 104, secondly open pivot 6 and make pivot 6 drive stirring leaf 96 rotate, scrape strip 910 and barrel wall inconsistent simultaneously, simultaneously expanding spring 99 round trip movement drive scrape strip 910 hug closely all the time with 1 inner wall of agitator, open at last electric rotatory piece 142 and make electric rotatory piece 142 drive scraper blade 146 rotate in 1 bottom of agitator, scrape the raw materials of 1 bottom of agitator and get totally, wherein electric lift loop bar 24's model is: YS-NZ100-12A, the type of the vibration motor 29 is: YZS-30-2, the type of the servo motor 5 is as follows: YE2-132S-4, the model of electric rotating block 142 is: DG 60-5.

The previous description is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a raw and other materials compounding device of vitrified grinding wheel production usefulness, includes agitator (1), installs bung (4) above agitator (1), servo motor (5) at bung (4) top, pivot (6) of connection and servo motor (5) output, fixed mounting are in bracing piece (7) of pivot (6) bottom and set up discharge gate (11) in agitator (1) bottom, its characterized in that: the automatic feeding and anti-blocking device is characterized by further comprising a metering mechanism (3), a sealing mechanism (10), a threaded sleeve (12), a scraping mechanism (14), two fixed sleeves (8) and two feeding anti-blocking mechanisms (2), wherein the two feeding anti-blocking mechanisms (2) are arranged on two sides of the outer wall of the stirring barrel (1) in a penetrating manner, the two feeding anti-blocking mechanisms (2) comprise a feeding hopper (22), a mounting groove (23) formed in one side of the bottom of the feeding hopper (22), an electric lifting sleeve rod (24) fixedly arranged in the mounting groove (23), and a movable bottom plate (25) fixedly arranged at the telescopic end of the electric lifting sleeve rod (24), the movable bottom plate (25) is hinged with the feeding hopper (22), the metering mechanism (3) is arranged on one side of the outer wall of the feeding hopper (22), the two fixed sleeves (8) are fixedly arranged on the outer wall of a supporting rod (7), the two stirring mechanisms (9) are fixedly arranged on two sides of the fixed sleeves (8), sealing mechanism (10) sets up at bung (4) outer wall, thread bush (12) set up at discharge gate (11) inner wall, thread bush (12) inboard cooperation is installed screw plug (13), scrape and get mechanism (14) and set up in agitator (1) inner wall bottom.

2. The raw material mixing device for producing the ceramic grinding wheel according to claim 1, characterized in that: two anti-blocking mechanism of feeding (2) still includes inlet pipe (21), fixing bolt (27), mounting panel (28), vibrating motor (29), connecting rod (210) and vibrating mass (211) respectively, inlet pipe (21) run through to be installed in agitator (1) outer wall one side, mounting panel (28) are through fixing bolt (27) and agitator (1) fixed mounting, vibrating motor (29) fixed mounting is at mounting panel (28) top, connecting rod (210) are installed at vibrating motor (29) output, vibrating mass (211) fixed mounting is in connecting rod (210) one end, vibrating mass (211) contact with inlet pipe (21).

3. The raw material mixing device for producing the ceramic grinding wheel according to claim 1, characterized in that: metering mechanism (3) are including label cover (33), scale (34), a plurality of movable block (31), a plurality of movable mounting at the inboard movable hook (32) of a plurality of movable block (31), and are a plurality of the equal fixed mounting of movable block (31) is in feeder hopper (22) outer wall both sides, label cover (33) fixed mounting is in a plurality of movable hook (32) one side, scale (34) are placed inside label cover (33).

4. The raw material mixing device for producing the ceramic grinding wheel according to claim 1, characterized in that: the stirring mechanism (9) comprises a first connecting block (91), a rotary table (92), a second connecting block (93), a jack (94), a fixing rod (95), a stirring blade (96), a telescopic sleeve (97), a scraping strip (910) and a plurality of first fixing blocks (98) fixedly arranged inside the telescopic sleeve (97), each first fixing block (98) and the scraping strip (910) are connected with a telescopic spring (99), the first connecting block (91) is fixedly arranged on one side of a fixed sleeve (8), the rotary table (92) is arranged on one side of the first connecting block (91), the second connecting block (93) is fixedly arranged on one side of the rotary table (92), the jack (94) is arranged on one side of the outer wall of the second connecting block (93), the fixing rod (95) penetrates through the inner side of the jack (94), the stirring blade (96) is fixedly arranged on one side of the second connecting block (93), the telescopic sleeve (97) is fixedly arranged at one end of the stirring blade (96).

5. The raw material mixing device for producing the ceramic grinding wheel according to claim 1, characterized in that: sealing mechanism (10) include hinge (101), sealed piece (102), gag lever post (103) and spacing hole (104), install in bung (4) outer wall one side hinge (101), sealed piece (102) are articulated through hinge (101) and bung (4) outer wall one side, gag lever post (103) fixed mounting is in sealed piece (102) inner wall one side, spacing hole (104) are seted up at agitator (1) outer wall, gag lever post (103) and spacing hole (104) phase-match.

6. The raw material mixing device for producing the ceramic grinding wheel according to claim 1, characterized in that: the scraping mechanism (14) comprises two mounting blocks (141), two electric rotating blocks (142) respectively mounted on one sides of the two mounting blocks (141), two second fixing blocks (143) fixedly mounted on one sides of the electric rotating blocks (142), two clamping grooves (144) respectively formed in one sides of the second fixing blocks (143), a clamping block (145) mounted on the inner side of the clamping groove (144) in a matched mode, and two scraping plates (146) fixedly mounted on one sides of the clamping block (145).