CN212664285U - Whitewashing mechanism in potsherd processing - Google Patents

Whitewashing mechanism in potsherd processing Download PDF

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Publication number
CN212664285U
CN212664285U CN202021278550.7U CN202021278550U CN212664285U CN 212664285 U CN212664285 U CN 212664285U CN 202021278550 U CN202021278550 U CN 202021278550U CN 212664285 U CN212664285 U CN 212664285U
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CN
China
Prior art keywords
cover body
dust
horizontal frame
pipe
fixed
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Expired - Fee Related
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CN202021278550.7U
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Chinese (zh)
Inventor
苏志强
苏子锋
詹淑芳
陈萍
彭明星
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Hubei Dangyang Houson Building Materials Co ltd
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Hubei Dangyang Houson Building Materials Co ltd
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Priority to CN202021278550.7U priority Critical patent/CN212664285U/en
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Publication of CN212664285U publication Critical patent/CN212664285U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a whitewashing mechanism in potsherd processing, it includes horizontal frame, is equipped with transport mechanism on the horizontal frame, is equipped with the cover body on the horizontal frame and be located the transport mechanism top, and the horizontal frame is back shape frame structure, and transport mechanism includes that the level sets up the conveyer belt in the horizontal frame, is equipped with dust removal mechanism in the cover body, and dust removal mechanism includes the conveyer pipe and sets up the air exhauster on the conveyer pipe, the one end of conveyer pipe and the internal portion intercommunication of cover. The utility model aims at avoiding appearing in the pottery brush powder process, the dust that the brush powder produced is scattered all around easily, and the dust that scatters all around influences the healthy condition of human lung after being inhaled by personnel in the factory building, and brush powder mechanism in the potsherd processing that a has dust cover and dust absorption pipe-line system that proposes.

Description

Whitewashing mechanism in potsherd processing
Technical Field
The utility model belongs to ceramic tile production, processing equipment field specifically are a whitewashing mechanism in potsherd processing.
Background
In the production and processing of current pottery, process, need carry out cleaning to ceramic surface's dust, if adopt artifical mopping, inefficiency to operational environment is abominable, influences staff's health, and semi-manufactured body of cube itself is fragile, and artifical mopping also appears the misoperation easily and damages semi-manufactured goods. If adopt the mode of blowing and mill combination to clear up, there is the not good problem of cleaning performance, if the mill height is too low damage the body surface easily, and high too high then cleaning performance is not good, and the mode field dust of adopting the clearance of blowing is great, and bell-type induced air dust collector is not enough to lead away the floating dust, and the dust that falls has influenced ceramic body's surface quality again.
In order to solve the above technical problem, patent document No. CN204725288U discloses an automatic cleaning device for ceramic body surface powder, wherein a grinding head device, an air blowing device, a brush roller device and an air inducing device are arranged above a conveyor belt. In the brush roller device, a planet carrier is rotatably supported on a brush roller bracket through a rotating shaft, a plurality of brush rollers are rotatably arranged on the planet carrier, a planetary gear is fixedly arranged at the end head of each brush roller and is meshed with a fixed fluted disc, and the rotating shaft is connected with a driving device. The ceramic tile is milled by the grinding head in a rotating mode, the brush roll is matched with air for brushing, and then powder is led away by the small-caliber air inducing device, so that the surface quality of a ceramic blank is improved, and the ceramic tile with high quality is obtained.
In the brush whitewashed mechanism of this kind of potsherd processing above-mentioned, carry out the brush whitewashed to the potsherd in mostly naked operational environment, can cause the dust to spatter all around like this, very easily inhaled to the respiratory track by the staff in, can also cause human respiratory tract infection when serious, and brush whitewashed mechanism does not fix the potsherd in the processing of most potsherds, like this in the brush whitewashed, the potsherd can take place to remove, the effect is not good, and brush whitewashed mechanism does not collect the dust of brushing out and recycles in the processing of a lot of potsherds, can cause very big waste like this, be not conform to the environmental protection requirement.
Therefore, the applicant improves the technology and provides a powder brushing mechanism in ceramic chip processing.
Disclosure of Invention
The utility model aims at avoiding appearing in the pottery brush powder process, the dust that the brush powder produced is scattered all around easily, and the dust that scatters all around influences the healthy condition of human lung after being inhaled by personnel in the factory building, and brush powder mechanism in the potsherd processing that a has dust cover and dust absorption pipe-line system that proposes.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a whitewashing mechanism in potsherd processing, it includes horizontal frame, is equipped with transport mechanism on the horizontal frame, is equipped with the cover body on the horizontal frame and be located the transport mechanism top, and the horizontal frame is back shape frame structure, and transport mechanism includes that the level sets up the conveyer belt in horizontal frame, is equipped with dust removal mechanism in the cover body, and dust removal mechanism includes the conveyer pipe and sets up the air exhauster on the conveyer pipe, the one end of conveyer pipe and the internal portion intercommunication of cover.
The conveying mechanism can convey the ceramic body to the cover body, the dust removing mechanism can remove dust from the ceramic body, and the exhaust fan can exhaust dust from the dust in the cover body.
The conveying mechanism comprises a first electric roller, a transmission roller, a conveying belt and a rotating shaft, the cover body is positioned in the middle of the top end of the horizontal frame, and two ends of the bottom of the cover body are fixedly connected with two side sides of the top of the horizontal frame.
Above-mentioned transport mechanism still includes the spacing frame of a plurality of U type, first electronic roller is located the one end of horizontal frame inner chamber, and the both ends of first electronic roller are fixed respectively and are pegged graft on the inner wall of horizontal frame both sides, the rotation axis is located the other end of horizontal frame inner chamber, the both ends of rotation axis are rotatory respectively and are pegged graft on the inner wall of horizontal frame both sides, the fixed cover of transmission gyro wheel is established on the surface of first electronic roller and rotation axis, be connected through the conveyer belt transmission between transmission gyro wheel and the transmission gyro wheel, the equidistant surface at the conveyer belt of fixing of the spacing frame of a plurality of U type.
The inside of the cover body is provided with a powder brushing mechanism, the powder brushing mechanism comprises a second electric roller and a sponge sleeve, the middle parts of the bottom ends of the two sides of the cover body are respectively provided with a through hole, the dust removing mechanism is arranged at one side inside the cover body and comprises a first dust pumping pipe, an exhaust fan, a second dust pumping pipe and a conveying pipe, the top end of the cover body is provided with a filtering mechanism, the filtering mechanism comprises an air return pipe, a collecting box and a filtering plate,
the two ends of the second electric roller are respectively fixedly connected with the two sides of the inner wall of the cover body, the sponge sleeve is fixedly sleeved on the outer surface of the second electric roller, the cover body on one side of the sponge sleeve is fixedly provided with a powder scraping plate, and the surface of the powder scraping plate is tightly attached to the surface of the sponge sleeve.
The fixed grafting in one side of the cover body of one end of above-mentioned first dust extraction pipe, the tip of first dust extraction pipe is just to scraping the powder board, the other end of first dust extraction pipe is taken out dirt pipe middle part intercommunication through three way connection and second, one side of air exhauster and one side fixed connection of the cover body, the one end fixed connection of dirt pipe is taken out with the second in the suction opening of air exhauster, the bottom in cover body one side is taken out to the other end of dirt pipe is fixed to peg graft to the second, the tip of dirt pipe is just to the telescopic bottom of sponge to the second, the one end of conveyer pipe and the air exit fixed connection of air exhauster, the other end of conveyer pipe is fixed to be pegged graft on the top of collecting.
The fixed filter that is equipped with in middle part of above-mentioned collecting box inner chamber, the vertical place of filter, the top screwed connection of collecting box has the spiral cover, and the inner wall at the top of spiral cover inner chamber is fixed to be equipped with sealed the pad, and the bottom of sealed pad is closely laminated with the top of collecting box, and the one end of muffler is fixed to be pegged graft on the top of collecting box opposite side, and the other end of muffler is fixed to be pegged graft in the bottom of cover body opposite.
The landing leg is all fixed to four edges of above-mentioned horizontal frame bottom, and the bottom of four landing legs is all fixed and is equipped with the service brake universal wheel.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model can well avoid the situation that the dust generated by brushing powder is easy to scatter in the ceramic brushing process, and the scattered dust influences the health of the lung of a human body after being sucked by personnel in a factory building;
2) according to the powder brushing mechanism in the ceramic wafer processing, the cover body is arranged, and the sponge sleeve brushes the powder on the ceramic wafer in the cover body, so that the situation that dust flies into the outside air is avoided, the dust is not easily sucked into a respiratory tract by workers, and the health of the workers can be protected;
3) the spacing frame of the surface mounting's of conveyer belt U type can play spacing effect to the porcelain piece, and when the porcelain piece was whitewashed by the sponge sleeve again like this, can not lead to taking place to remove to its application of force because of the sponge sleeve, the air exhauster was taken out the dust of cover internal portion through first dust extraction pipe and second and is taken out the inside that the pipeline entered into the collection box again through the conveyer pipe, and the filter filters the dust, and the dust after the filtration is stayed the inside of collection box.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a cross-sectional structure of the middle conveyor belt of the present invention;
FIG. 3 is a schematic cross-sectional view of the middle cover body of the present invention;
FIG. 4 is a schematic top view of the filtering mechanism of the present invention;
fig. 5 is a schematic view of a partial cross-sectional structure of a second motorized roller according to the present invention;
FIG. 6 is a schematic view of a partial cross-sectional structure of a sponge sleeve according to the present invention;
fig. 7 is a schematic view of the structure of the local section of the collecting box of the present invention.
In the figure: 1. a horizontal frame; 2. a cover body; 3. a first motorized roller; 4. a transmission roller; 5. a conveyor belt; 6. a rotating shaft; 7. a second motorized roller; 8. a sponge sleeve; 9. a through hole; 10. a first dust extraction pipe; 11. an exhaust fan; 12. a second dust extraction pipe; 13. a delivery pipe; 14. an air return pipe; 15. a collection box; 16. a filter plate; 17. a support leg; 18. a foot brake universal wheel; 19. a U-shaped limit frame; 20. a screw cap; 21. a gasket; 22. and (4) a powder scraping plate.
Detailed Description
As shown in fig. 1 and 2, a powder brushing mechanism in ceramic wafer processing comprises a horizontal frame 1, a conveying mechanism is arranged on the horizontal frame 1, a cover body 2 is arranged on the horizontal frame 1 and above the conveying mechanism, the horizontal frame 1 is of a square frame structure, the conveying mechanism comprises a conveying belt 5 horizontally arranged in the frame body of the horizontal frame 1, a dust removing mechanism is arranged in the cover body 2, the dust removing mechanism comprises a conveying pipe 13 and an exhaust fan 11 arranged on the conveying pipe 13, and one end of the conveying pipe 13 is communicated with the inside of the cover body 2.
Wherein, transport mechanism can carry the ceramic body to the cover body 2 in, and dust removal mechanism can remove dust to the ceramic body, and exhaust fan 11 can take out the dirt to the dust in the cover body 2.
Further, as shown in fig. 3 and 7, the conveying mechanism includes a first electric roller 3, two transmission rollers 4, a conveying belt 5 and a rotating shaft 6, the cover body 2 is located in the middle of the top end of the horizontal frame 1, and two ends of the bottom of the cover body 2 are fixedly connected with two sides of the top of the horizontal frame 1, a powder brushing mechanism is arranged inside the cover body 2, the powder brushing mechanism includes a second electric roller 7 and a sponge sleeve 8, through holes 9 are formed in the middle of the bottom ends of two sides of the cover body 2, a dust removing mechanism is arranged on one side of the cover body 2, the dust removing mechanism includes a first dust pumping pipe 10, an exhaust fan 11, a second dust pumping pipe 12 and a conveying pipe 13, a filtering mechanism is arranged at the top end of the cover body 2, and the filtering mechanism includes an air return pipe 14;
wherein, as shown in fig. 2 or 4, the conveying mechanism further comprises a plurality of U-shaped spacing frames 19, the first electric roller 3 is located at one end of the inner cavity of the horizontal frame 1, two ends of the first electric roller 3 are respectively fixed and inserted on the inner walls of two sides of the horizontal frame 1, the rotating shaft 6 is located at the other end of the inner cavity of the horizontal frame 1, two ends of the rotating shaft 6 are respectively rotatably inserted on the inner walls of two sides of the horizontal frame 1, two transmission rollers 4 are respectively fixed and sleeved on the surfaces of the first electric roller 3 and the rotating shaft 6, the two transmission rollers 4 are in transmission connection through the conveying belt 5, the plurality of U-shaped spacing frames 19 are equidistantly fixed on the outer surface of the conveying belt 5, the first electric roller 3 drives the transmission rollers 4 to rotate, the transmission rollers 4 drive the conveying belt 5 to convey the porcelain piece to the inside of the cover body 2 for brushing powder, the plurality of U-shaped spacing frames 19 play a spacing role for the, like this the porcelain piece is when being brushed by 8 brush powder of sponge sleeve again, can not lead to taking place to remove because of 8 to its application of force of sponge sleeve, can promote the brush powder effect to the porcelain piece like this.
As shown in fig. 2 or 3 or 5 or 6, wherein, the both ends of the electronic roller 7 of second respectively with the both sides fixed connection of the cover body 2 inner wall, the fixed cover of sponge sleeve 8 is established at the surface of the electronic roller 7 of second, the fixed powder board 22 that scrapes that is equipped with on the cover body 2 of sponge sleeve 8 one side, the surface of scraping the powder board 22 is closely laminated with the surface of sponge sleeve 8, the electronic roller 7 of second drives sponge sleeve 8 and carries out high-speed rotation, sponge sleeve 8 can clear up the dust on porcelain piece surface like this, scrape the powder board 22 and can clear up the dust that sponge sleeve 8 attached to the surface, sponge sleeve 8's surface just can not attach more dust like this, lead to the unable better brushing effect of exerting of sponge sleeve 8.
Wherein, one end of the first dust exhaust pipe 10 is fixedly inserted in one side of the cover body 2, and the end of the first dust exhaust pipe 10 is opposite to the dust scraping plate 22, the other end of the first dust exhaust pipe 10 is communicated with the middle part of the second dust exhaust pipe 12 through a three-way joint, one side of the exhaust fan 11 is fixedly connected with one side of the cover body 2, the air suction port of the exhaust fan 11 is fixedly connected with one end of the second dust exhaust pipe 12, the other end of the second dust exhaust pipe 12 is fixedly inserted in the bottom end of one side of the cover body 2, and the end of the second dust exhaust pipe 12 is opposite to the bottom end of the sponge sleeve 8, one end of the conveying pipe 13 is fixedly connected with the air outlet of the exhaust fan 11, the other end of the conveying pipe 13 is fixedly inserted in the top end of one side of the collection box 15, the exhaust fan 11 extracts the dust in the cover body 2 through the second dust exhaust pipe 12 and then enters the interior of the collection box 15 through the conveying pipe 13, so as to collect the, accomplish a wind-force circulation like this, the inside dust of the cover body 2 can in time be cleared up, and the first convulsions effect of drawing dust pipe 10 dependence air exhauster 11 simultaneously can be collected the inside of collection box 15 with the dust of gathering above the board 22 of scraping.
As shown in fig. 3, the fixed filter 16 that is equipped with in middle part of collecting box 15 inner chamber, and the vertical placement of filter 16, the top screwed connection of collecting box 15 has screw cap 20, the fixed sealed pad 21 that is equipped with of inner wall at the top of screw cap 20 inner chamber, the bottom of sealed pad 21 is closely laminated with the top of collecting box 15, the fixed top of pegging graft at collecting box 15 opposite side of one end of muffler 14, the fixed bottom of pegging graft at cover body 2 opposite side of the other end of muffler 14, filter 16 can seal collecting box 15, the inside of collecting box 15 can only be stayed to the dust of being collected like this, filter 16 filters the dust simultaneously, the dust after the filtration can be recycled, can strengthen the leakproofness between collecting box 15 and the screw cap 20 through sealed pad 21.
Optionally, the type of the exhaust fan 11 is SY-FYSJ01, the type of the second electric roller 7 is TDY75, and the type of the first electric roller 3 is TDY 75; for those skilled in the art, the components used in the present invention belong to the technologies known to those skilled in the art, the selection of the models is not limited to the description in the present specification, the connection and control relationship of the above conventional electronic components belong to the common knowledge of those skilled in the art, and the details are not repeated in the present specification, and those skilled in the art can select the known means to install each component according to the actual situation on site.
When the utility model is used, the device is moved to the working position, and the foot brake of the foot brake universal wheel 18 is stepped down to fix the device, so that the device can not move;
turning on a fan switch, starting an exhaust fan 11 to work, and exhausting dust in the cover body 2 by the exhaust fan 11 through a first dust exhaust pipe 10 and a second dust exhaust pipe 12 and then entering the collection box 15 through a conveying pipe 13;
the filter plate 16 in the collecting box 15 filters dust, and the exhaust fan 11 simultaneously enters the filtered wind power into the cover body 2 through the muffler 14, so that a wind power circulation is completed, and the dust in the cover body 2 can be collected and cleaned in a centralized manner;
four edges of horizontal frame 1 bottom all fix and are equipped with landing leg 17, and four landing legs 17's bottom all fixes and is equipped with service brake universal wheel 18.
The second electric switch is turned on, the second electric roller 7 starts to work, the second electric roller 7 drives the sponge sleeve 8 to rotate, then the first electric switch is turned on, the first electric roller 3 starts to work, the first electric roller 3 drives the transmission roller 4 to rotate, the transmission roller 4 drives the conveyor belt 5 to rotate, the porcelain piece is placed inside the clamping grooves of the U-shaped limiting frames 19, the U-shaped limiting frames 19 are fixed on the outer surface of the conveyor belt 5, the conveyor belt 5 drives the U-shaped limiting frames 19 to convey the porcelain piece to the bottom of the sponge sleeve 8, the sponge sleeve 8 brushes the surface of the porcelain piece at the moment, and meanwhile the U-shaped limiting frames 19 play a limiting role on the porcelain piece, so that when the porcelain piece is brushed by the sponge sleeve 8, the movement caused by the force applied by the sponge sleeve 8 can be avoided, and the brushing on the surface of the porcelain piece can be more uniform;
scrape whitewashed board 22 simultaneously and can scrape the dust that sponge sleeve 8 surface was attached to, and through air exhauster 11 to its suction through first dust extraction pipe 10 entering to the inside of collection box 15 filter and collect again, after the work, close first, second electric switch and fan switch, first electric roller 3, the electronic roller 7 of second and air exhauster 11 stop work, open spiral cover 20, can clear up the inside of collection box 15 and filter 16, can will deposit and carry out reuse in the inside filterable dust of collection box 15 simultaneously.

Claims (9)

1. A whitewashed mechanism in potsherd processing which characterized in that: it includes horizontal frame (1), be equipped with transport mechanism on horizontal frame (1), be equipped with the cover body (2) on horizontal frame (1) and be located the transport mechanism top, horizontal frame (1) is the frame structure that returns the shape, transport mechanism includes that the level sets up conveyer belt (5) in horizontal frame (1) frame, be equipped with dust removal mechanism in the cover body (2), dust removal mechanism includes conveyer pipe (13) and sets up air exhauster (11) on conveyer pipe (13), the one end of conveyer pipe (13) and the inside intercommunication of the cover body (2).
2. The powder brushing mechanism in ceramic wafer processing according to claim 1, characterized in that: the conveying mechanism can convey the ceramic body into the cover body (2), the dust removing mechanism can remove dust from the ceramic body, and the exhaust fan (11) can exhaust dust from dust in the cover body (2).
3. The brush powder mechanism in ceramic wafer processing of claim 1 or 2, characterized in that: the conveying mechanism comprises a first electric roller (3), a transmission roller (4), a conveying belt (5) and a rotating shaft (6), the cover body (2) is located in the middle of the top end of the horizontal frame (1), and two ends of the bottom of the cover body (2) are fixedly connected with two sides of the top of the horizontal frame (1).
4. The powder brushing mechanism in ceramic chip processing according to claim 3, characterized in that: transport mechanism still includes spacing frame of a plurality of U type (19), first electronic roller (3) are located the one end of horizontal frame (1) inner chamber, and the both ends of first electronic roller (3) are fixed respectively and are pegged graft on the inner wall of horizontal frame (1) both sides, rotation axis (6) are located the other end of horizontal frame (1) inner chamber, the both ends of rotation axis (6) are rotatory respectively and are pegged graft on the inner wall of horizontal frame (1) both sides, the fixed cover of transmission gyro wheel (4) is established on the surface of first electronic roller (3) and rotation axis (6), be connected through conveyer belt (5) transmission between transmission gyro wheel (4) and the transmission gyro wheel, the surface at conveyer belt (5) is fixed to the equidistant of a plurality of U type spacing frame (19).
5. The powder brushing mechanism in ceramic chip processing according to claim 4, characterized in that: the inside of the cover body (2) is provided with a brush powder mechanism, the brush powder mechanism comprises a second electric roller (7) and a sponge sleeve (8), a through hole (9) is formed in the middle of the bottom ends of the two sides of the cover body (2), the dust removal mechanism is arranged on one side of the inside of the cover body (2), the dust removal mechanism comprises a first dust extraction pipe (10), an air exhauster (11), a second dust extraction pipe (12) and a conveying pipe (13), the top end of the cover body (2) is provided with a filtering mechanism, and the filtering mechanism comprises an air return pipe (14), a collecting box (15) and a filtering plate (16).
6. The powder brushing mechanism in ceramic chip processing according to claim 5, characterized in that: the both ends of the electronic roller of second (7) respectively with the both sides fixed connection of the cover body (2) inner wall, the fixed cover of sponge sleeve (8) is established at the surface of the electronic roller of second (7), fixedly on the cover body (2) of sponge sleeve (8) one side be equipped with scrape whitewashed board (22), scrape the surface of whitewashed board (22) and closely laminate with the surface of sponge sleeve (8).
7. The brushing mechanism in ceramic wafer processing according to claim 5 or 6, characterized in that: the one end of first dust extraction pipe (10) is fixed to be pegged graft in one side of the cover body (2), the tip of first dust extraction pipe (10) is just to scraping whitewashed board (22), the other end of first dust extraction pipe (10) passes through three way connection and second dust extraction pipe (12) middle part intercommunication, one side and one side fixed connection of the cover body (2) of air exhauster (11), the suction opening of air exhauster (11) and the one end fixed connection of second dust extraction pipe (12), the other end of second dust extraction pipe (12) is fixed to be pegged graft in the bottom of the cover body (2) one side, the tip of second dust extraction pipe (12) is just to the bottom of sponge sleeve (8), the one end of conveyer pipe (13) and the air exit fixed connection of air exhauster (11), the other end of conveyer pipe (13) is fixed to be pegged graft in the top of collecting box (15) one side.
8. The powder brushing mechanism in the ceramic chip processing according to claim 7, characterized in that a filter plate (16) is fixedly arranged in the middle of the inner cavity of the collection box (15), the filter plate (16) is vertically arranged, a screw cap (20) is spirally connected to the top end of the collection box (15), a sealing gasket (21) is fixedly arranged on the inner wall of the top of the inner cavity of the screw cap (20), the bottom end of the sealing gasket (21) is tightly attached to the top end of the collection box (15), one end of the air return pipe (14) is fixedly inserted into the top end of the other side of the collection box (15), and the other end of the air return pipe (14) is fixedly inserted into the bottom end of the other side.
9. The ceramic chip processing brushing mechanism according to claim 1, 2, 4, 5, 6 or 8, wherein four corners of the bottom end of the horizontal frame (1) are respectively fixedly provided with a support leg (17), and the bottom ends of the four support legs (17) are respectively fixedly provided with a foot brake universal wheel (18).
CN202021278550.7U 2020-07-03 2020-07-03 Whitewashing mechanism in potsherd processing Expired - Fee Related CN212664285U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021278550.7U CN212664285U (en) 2020-07-03 2020-07-03 Whitewashing mechanism in potsherd processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021278550.7U CN212664285U (en) 2020-07-03 2020-07-03 Whitewashing mechanism in potsherd processing

Publications (1)

Publication Number Publication Date
CN212664285U true CN212664285U (en) 2021-03-09

Family

ID=74818740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021278550.7U Expired - Fee Related CN212664285U (en) 2020-07-03 2020-07-03 Whitewashing mechanism in potsherd processing

Country Status (1)

Country Link
CN (1) CN212664285U (en)

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Granted publication date: 20210309

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