CN112677341A - Floor slotting and waste cleaning integrated device for architectural decoration construction - Google Patents

Floor slotting and waste cleaning integrated device for architectural decoration construction Download PDF

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Publication number
CN112677341A
CN112677341A CN202011511920.1A CN202011511920A CN112677341A CN 112677341 A CN112677341 A CN 112677341A CN 202011511920 A CN202011511920 A CN 202011511920A CN 112677341 A CN112677341 A CN 112677341A
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China
Prior art keywords
piston
base
fixed
piston cylinder
architectural decoration
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Withdrawn
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CN202011511920.1A
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Chinese (zh)
Inventor
莫学雁
李卫军
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Zebra House Wuhan Information Technology Co ltd
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Zebra House Wuhan Information Technology Co ltd
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Priority to CN202011511920.1A priority Critical patent/CN112677341A/en
Publication of CN112677341A publication Critical patent/CN112677341A/en
Withdrawn legal-status Critical Current

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Abstract

The invention relates to a ground grooving and waste material cleaning integrated device for architectural decoration construction. This an integrative device of ground fluting and waste material clearance for architectural decoration construction, the motor drives the fluting blade and rotates, when slotting to ground, the motor drives the drive wheel and rotates, make the drive wheel drive the transfer line and reciprocate, make the transfer line drive the piston rod and reciprocate, make the piston rod drive the piston and reciprocate, make the inside negative pressure state that forms of piston cylinder above the piston, make first check valve open, the air is inside by the suction piston cylinder in the garbage collection box, make the garbage collection box be negative pressure state, make the negative pressure pipe adsorb the inside of garbage collection box through the crushed aggregates that produces when inhaling the stub bar and will slot, avoid the crushed aggregates to get into the inside of breathing pipe through the filter stand, be convenient for clear up the crushed aggregates when slotting to ground.

Description

Floor slotting and waste cleaning integrated device for architectural decoration construction
Technical Field
The invention relates to the technical field of architectural decoration construction, in particular to a ground grooving and waste cleaning integrated device for architectural decoration construction.
Background
The decoration engineering refers to the engineering of house construction including the processes of plastering, painting, brushing paste, glass, pasting, veneer, overlay panel, floriation and the like, and in the construction process of building decoration, a floor grooving device is needed to be used for grooving the floor.
Ground fluting device for architectural decoration construction can produce a large amount of crushed aggregates when using, and follow-up waste material cleaning device that needs to use is cleared up the crushed aggregates, can't clear up the crushed aggregates when slotting the ground, and inconvenient use so we have proposed a ground fluting for architectural decoration construction and integrative device of waste material clearance to in solving the problem that proposes in the aforesaid.
Disclosure of Invention
The invention aims to provide an integrated device for floor grooving and waste cleaning for architectural decoration construction, which aims to solve the problems that a large amount of crushed aggregates are generated when a floor grooving device for architectural decoration construction is used, the crushed aggregates are cleaned by a waste cleaning device subsequently, the crushed aggregates cannot be cleaned while the floor is grooved, and the use is inconvenient.
In order to achieve the purpose, the invention provides the following technical scheme: a ground slotting and waste material cleaning integrated device for architectural decoration construction comprises a base, wherein one side of the bottom of the base is provided with a motor, a rotating shaft is fixed at the shaft end of the motor, a knife groove is arranged in the middle of the bottom end of the base, wherein,
a grooving blade is fixed on one side of the rotating shaft corresponding to the cutter groove, the base moves through a supporting mechanism, a piston cylinder is fixed on one side of the middle of the top end of the base, a piston is arranged in the piston cylinder, a piston rod is fixed at the bottom of the piston, and one end, far away from the piston, of the piston rod penetrates through the piston cylinder and the inside of the base and extends to the outside;
the bottom of piston rod rotates and is connected with the transfer line, the end fixing that the pivot is close to the transfer line has the drive wheel, one side of drive wheel is fixed with the dwang, the bottom and the dwang of transfer line rotate and are connected, the base is close to one side of piston cylinder and installs clearance mechanism, the base is close to the opposite side of piston cylinder and installs cooling body.
Preferably, flexible groove has been seted up in the bottom four corners of base, the inside in flexible groove is provided with the installation pole, the bottom of installation pole is fixed with the universal wheel, the lead screw groove has been seted up at the top of installation pole, the inside threaded connection in lead screw groove has the lead screw, the inside that the base was run through at the top of lead screw extends to the outside, the top of lead screw is fixed with the gear, the outside cover of gear has the cingulum, the outside that the base is close to gear and cingulum is fixed with the protection casing, the top of gear is fixed with the handle, the inside that the protection casing was run through at the top of handle extends to the outside.
Preferably, the mounting rod is rectangular column-shaped, and the external dimension of the mounting rod is matched with the internal dimension of the telescopic groove.
Preferably, the gear is meshed with the toothed belt, and the gear and the toothed belt form a synchronous structure.
Preferably, the piston is made of rubber materials, and the outer diameter of the piston is equal to the inner diameter of the piston cylinder.
Preferably, the transmission wheel and the piston rod form a transmission structure through a transmission rod.
Preferably, a garbage recycling box is fixed to the top of one side, close to the piston cylinder, of the base, a negative pressure pipe is arranged inside the garbage recycling box, the bottom end of the negative pressure pipe penetrates through the inside of the garbage recycling box and the base and extends to the outside, a material suction head is communicated with the bottom of the negative pressure pipe, a discharge hole is formed in one side of the bottom of the garbage recycling box, one side of the top of the piston cylinder is communicated with the garbage recycling box through an air suction pipe, a first check valve is fixed to the inside of the air suction pipe, and a filter frame is fixed to the inner side, close to the air suction pipe, of the garbage.
Preferably, the first check valve is used for one-way circulation of the garbage collection box to the piston cylinder.
Preferably, a water tank is fixed to the top of the other side, close to the piston cylinder, of the base, a water pipe is communicated with one side of the bottom end of the water tank, a spray head is communicated with the bottom end of the water pipe, a water inlet is formed in the top end of the water tank, the other side of the top of the piston cylinder is communicated with the water tank through an air inlet pipe, and a second one-way valve is fixed inside the air inlet pipe.
Preferably, the second check valve is in one-way communication from the piston cylinder to the water tank.
Compared with the prior art, the invention has the beneficial effects that:
1. this an integrative device of ground fluting and waste material clearance for architectural decoration construction, the motor drives the fluting blade and rotates, when slotting to ground, the motor drives the drive wheel and rotates, make the drive wheel drive the transfer line and reciprocate, make the transfer line drive the piston rod and reciprocate, make the piston rod drive the piston and reciprocate, make the inside negative pressure state that forms of piston cylinder above the piston, make first check valve open, the air is inside by the suction piston cylinder in the garbage collection box, make the garbage collection box be negative pressure state, make the negative pressure pipe adsorb the inside of garbage collection box through the crushed aggregates that produces when inhaling the stub bar and will slot, avoid the crushed aggregates to get into the inside of breathing pipe through the filter stand, be convenient for clear up the crushed aggregates when slotting to ground.
2. This ground fluting and integrative device of waste material clearance for architectural decoration construction, when the piston rebound, the inside atmospheric pressure increase of piston cylinder above the piston, the second check valve is opened, makes the piston cylinder air inside the water tank of being impressed, makes the water tank internal cooling water lead to pipe and shower nozzle blowout, makes the cooling water spray to fluting blade surface, is convenient for cool off the fluting blade when fluting to ground.
3. This an integrative device of ground fluting and waste material clearance for architectural decoration construction, when driving gear revolve through the handle, the gear passes through the cingulum and drives other gears and rotate simultaneously, make four side lead screws rotate simultaneously, make the lead screw produce relative movement with the installation pole, make the installation pole can drive the universal wheel and go up and down, when the universal wheel downstream, can support the base, make things convenient for the base to remove, when slotting ground, through adjusting the interval between the universal wheel to the base, can adjust the perpendicular distance between fluting blade bottom and the universal wheel bottom, be convenient for adjust the fluting degree of depth to ground.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic top view of the gear and toothed belt engagement of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 1A;
fig. 5 is a schematic top view of the mounting bar of the present invention.
In the figure: 1. a base; 2. a motor; 3. a rotating shaft; 4. a cutter groove; 5. a grooving blade; 6. a telescopic groove; 7. mounting a rod; 8. a universal wheel; 9. a screw rod groove; 10. a screw rod; 11. a gear; 12. a toothed belt; 13. a protective cover; 14. a handle; 15. a piston cylinder; 16. a piston; 17. a piston rod; 18. a transmission rod; 19. a driving wheel; 20. rotating the rod; 21. a garbage recycling bin; 22. a negative pressure tube; 23. a suction head; 24. a discharge port; 25. an air intake duct; 26. a first check valve; 27. a filter frame; 28. a water tank; 29. a water pipe; 30. a spray head; 31. a water inlet; 32. an air inlet pipe; 33. a second one-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.
Referring to fig. 1-5, the present invention provides a technical solution: a ground grooving and waste material cleaning integrated device for architectural decoration construction comprises a base 1, a motor 2, a rotating shaft 3, a tool groove 4, a grooving blade 5, a telescopic groove 6, an installation rod 7, a universal wheel 8, a screw rod groove 9, a screw rod 10, a gear 11, a toothed belt 12, a protective cover 13, a handle 14, a piston cylinder 15, a piston 16, a piston rod 17, a transmission rod 18, a transmission wheel 19, a rotating rod 20, a garbage recycling box 21, a negative pressure pipe 22, a suction head 23, a discharge port 24, an air suction pipe 25, a first check valve 26, a filter frame 27, a water tank 28, a water pipe 29, a spray head 30, a water inlet 31, an air inlet pipe 32 and a second check valve 33, wherein the motor 2 is installed on one side of the bottom of the base 1, the rotating shaft 3 is fixed on the shaft end of the motor 2, the tool groove 4,
a grooving blade 5 is fixed on one side of the rotating shaft 3 corresponding to the tool groove 4, the base 1 moves through a supporting mechanism, telescopic grooves 6 are formed in four corners of the bottom of the base 1, an installation rod 7 is arranged in each telescopic groove 6, universal wheels 8 are fixed at the bottom of the installation rod 7, a screw rod groove 9 is formed in the top of the installation rod 7, a screw rod 10 is connected to the internal threads of the screw rod groove 9, the top of the screw rod 10 penetrates through the inside of the base 1 and extends to the outside, a gear 11 is fixed at the top of the screw rod 10, a toothed belt 12 is sleeved on the outside of the gear 11, a protective cover 13 is fixed on the outer side of the base 1 close to the gear 11 and the toothed belt 12, a handle 14 is fixed at the top of the gear 11, the top of the handle 14 penetrates through the inside of the protective cover 13 and extends to the outside, the installation rod 7 is in a rectangular column shape, and the external dimension of the installation, the gear 11 is meshed with the toothed belt 12, and the gear 11 and the toothed belt 12 form a synchronous structure;
when the gear 11 is driven to rotate by the handle 14, the gear 11 drives other gears 11 to rotate simultaneously by the toothed belt 12, so that the screw rods 10 on four sides rotate simultaneously, the screw rods 10 and the mounting rod 7 move relatively, the mounting rod 7 can drive the universal wheel 8 to lift, when the universal wheel 8 moves downwards, the base 1 can be supported, the base 1 can move conveniently, when the ground is grooved, the vertical distance between the bottom of the grooving blade 5 and the bottom of the universal wheel 8 can be adjusted by adjusting the distance between the universal wheel 8 and the base 1, and the grooving depth of the ground can be adjusted conveniently;
a piston cylinder 15 is fixed on one side of the middle of the top end of the base 1, a piston 16 is arranged in the piston cylinder 15, the piston 16 is made of rubber materials, the outer diameter of the piston 16 is equal to the inner diameter of the piston cylinder 15, a piston rod 17 is fixed at the bottom of the piston 16, and one end, far away from the piston 16, of the piston rod 17 penetrates through the piston cylinder 15 and the inside of the base 1 and extends to the outside;
the bottom of the piston rod 17 is rotatably connected with a transmission rod 18, a transmission wheel 19 is fixed at the end part of the rotating shaft 3 close to the transmission rod 18, the transmission wheel 19 and the piston rod 17 form a transmission structure through the transmission rod 18, when the motor 2 drives the grooving blade 5 to rotate and grooves the ground, the motor 2 drives the transmission wheel 19 to rotate, so that the transmission wheel 19 drives the transmission rod 18 to move up and down, the transmission rod 18 drives the piston rod 17 to move up and down, the piston rod 17 drives the piston 16 to move up and down, the motor 2 drives the grooving blade 5 to rotate, the ground can drive the piston 16 to move up and down at the same time of grooving, a rotating rod 20 is fixed at one side of the transmission wheel 19, the bottom end of the transmission rod 18 is rotatably connected with the rotating;
a garbage recycling box 21 is fixed at the top of one side of the base 1 close to the piston cylinder 15, a negative pressure pipe 22 is arranged inside the garbage recycling box 21, the bottom end of the negative pressure pipe 22 penetrates through the garbage recycling box 21 and the inside of the base 1 to extend to the outside, a material suction head 23 is communicated with the bottom of the negative pressure pipe 22, a material discharge hole 24 is formed in one side of the bottom of the garbage recycling box 21, one side of the top of the piston cylinder 15 is communicated with the garbage recycling box 21 through an air suction pipe 25, a first check valve 26 is fixed inside the air suction pipe 25, a filter frame 27 is fixed on the inner side of the garbage recycling box 21 close to the air suction pipe 25, the first check valve 26 is communicated in a one-way mode from the garbage recycling box 21 to the piston cylinder 15, when the piston 16 moves downwards, a negative pressure state is formed inside the piston cylinder 15 above the piston 16, the first check valve 26 is opened, and air in the, the garbage recycling bin 21 is in a negative pressure state, the negative pressure pipe 22 absorbs the crushed materials generated in the slotting process into the garbage recycling bin 21 through the material suction head 23, the crushed materials are prevented from entering the air suction pipe 25 through the filter frame 27, and the crushed materials can be conveniently cleaned while the ground is slotted;
the other side of the base 1 close to the piston cylinder 15 is provided with a cooling mechanism, the top of the other side of the base 1 close to the piston cylinder 15 is fixed with a water tank 28, one side of the bottom end of the water tank 28 is communicated with a water pipe 29, the bottom end of the water pipe 29 is communicated with a spray head 30, the top end of the water tank 28 is provided with a water inlet 31, the other side of the top of the piston cylinder 15 is communicated with the water tank 28 through an air inlet pipe 32, a second check valve 33 is fixed in the air inlet pipe 32, the second check valve 33 is communicated in a one-way mode from the piston cylinder 15 to the water tank 28, when the piston 16 moves upwards, the air pressure inside the piston cylinder 15 above the piston 16 is increased, the second check valve 33 is opened, the air inside the piston cylinder 15 is pressed into the water tank 28, cooling water in the water tank 28 is sprayed out through the water pipe 29 and the spray head 30, and the cooling water is sprayed to the surface of the grooving blade 5, so that the grooving blade 5 can be cooled while grooving the ground.
The working principle is as follows: when the floor grooving and waste cleaning integrated device for building decoration construction is used, firstly, when the gear 11 is driven to rotate by the handle 14, the gear 11 drives other gears 11 to rotate simultaneously by the toothed belt 12, so that the screws 10 on four sides rotate simultaneously, the screws 10 and the mounting rods 7 generate relative movement, the mounting rods 7 can drive the universal wheels 8 to lift, when the universal wheels 8 move downwards, the base 1 can be supported, the base 1 can be moved conveniently, when the floor is grooved, the vertical distance between the bottoms of the grooving blades 5 and the bottoms of the universal wheels 8 can be adjusted by adjusting the distance between the universal wheels 8 and the base 1, the grooving depth of the floor can be adjusted conveniently, when the motor 2 drives the grooving blades 5 to rotate, and when the floor is grooved, the motor 2 drives the driving wheel 19 to rotate, so that the driving wheel 19 drives the driving rod 18 to move upwards and downwards, the transmission rod 18 drives the piston rod 17 to move up and down, the piston rod 17 drives the piston 16 to move up and down, the motor 2 drives the grooving blade 5 to rotate, and the piston 16 can be driven to move up and down while grooving on the ground;
when the piston 16 moves downwards, the interior of the piston cylinder 15 above the piston 16 is in a negative pressure state, the first check valve 26 is opened, air in the garbage recovery box 21 is sucked into the interior of the piston cylinder 15, the garbage recovery box 21 is in a negative pressure state, crushed aggregates generated during grooving are adsorbed to the interior of the garbage recovery box 21 through the material suction head 23 by the negative pressure pipe 22, the crushed aggregates are prevented from entering the interior of the air suction pipe 25 through the filter frame 27, the crushed aggregates are cleaned while grooving the ground, when the piston 16 moves upwards, the air pressure in the interior of the piston cylinder 15 above the piston 16 is increased, the second check valve 33 is opened, air in the piston cylinder 15 is pressed into the interior of the water tank 28, cooling water in the water tank 28 is sprayed out through the water pipe 29 and the spray head 30, the cooling water is sprayed to the surface of the grooving blade 5, and the grooving blade 5 is cooled while grooving the ground.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides an architectural decoration is integrative device of ground fluting and waste material clearance for construction, includes base (1), its characterized in that: a motor (2) is arranged on one side of the bottom of the base (1), a rotating shaft (3) is fixed at the shaft end of the motor (2), a cutter groove (4) is arranged in the middle of the bottom end of the base (1), wherein,
a grooving blade (5) is fixed on one side of the rotating shaft (3) corresponding to the grooving groove (4), the base (1) moves through a supporting mechanism, a piston cylinder (15) is fixed on one side of the middle of the top end of the base (1), a piston (16) is arranged inside the piston cylinder (15), a piston rod (17) is fixed at the bottom of the piston (16), and one end, far away from the piston (16), of the piston rod (17) penetrates through the piston cylinder (15) and the inside of the base (1) and extends to the outside;
the bottom of piston rod (17) is rotated and is connected with transfer line (18), the end fixing that pivot (3) are close to transfer line (18) has drive wheel (19), one side of drive wheel (19) is fixed with dwang (20), the bottom and dwang (20) of transfer line (18) rotate and are connected, the clearance mechanism is installed to one side that base (1) is close to piston cylinder (15), cooling body is installed to the opposite side that base (1) is close to piston cylinder (15).
2. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 1, wherein: the supporting mechanism comprises a telescopic groove (6), a mounting rod (7), universal wheels (8), a screw rod groove (9), a screw rod (10), a gear (11), a toothed belt (12), a protective cover (13) and a handle (14), wherein the telescopic groove (6) is formed in four corners of the bottom of the base (1), the mounting rod (7) is arranged inside the telescopic groove (6), the universal wheels (8) are fixed at the bottom of the mounting rod (7), the screw rod groove (9) is formed in the top of the mounting rod (7), the screw rod (10) is connected to the inner thread of the screw rod groove (9), the top of the screw rod (10) penetrates through the inside of the base (1) and extends to the outer side, the gear (11) is fixed at the top of the screw rod (10), the toothed belt (12) is sleeved outside the gear (11), the protective cover (13) is fixed on the outer side, close to the gear (11) and the toothed belt (12), of the base (, a handle (14) is fixed to the top of the gear (11), and the top of the handle (14) penetrates through the interior of the protective cover (13) and extends to the outside.
3. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 2, wherein: the mounting rod (7) is rectangular column-shaped, and the external dimension of the mounting rod (7) is matched with the internal dimension of the telescopic groove (6).
4. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 2, wherein: the gear (11) is meshed with the toothed belt (12), and the gear (11) and the toothed belt (12) form a synchronous structure.
5. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 1, wherein: the piston (16) is made of rubber materials, and the outer diameter of the piston (16) is equal to the inner diameter of the piston cylinder (15).
6. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 1, wherein: the transmission wheel (19) and the piston rod (17) form a transmission structure through the transmission rod (18).
7. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 1, wherein: the cleaning mechanism comprises a garbage recycling box (21), a negative pressure pipe (22), a material suction head (23), a material discharge hole (24), an air suction pipe (25), a first one-way valve (26) and a filter rack (27), a garbage recycling box (21) is fixed at the top of one side of the base (1) close to the piston cylinder (15), a negative pressure pipe (22) is arranged in the garbage recycling box (21), the bottom end of the negative pressure pipe (22) penetrates through the garbage recycling box (21) and the base (1) and extends to the outside, the bottom of the negative pressure pipe (22) is communicated with a material suction head (23), one side of the bottom of the garbage recycling bin (21) is provided with a material outlet (24), one side of the top of the piston cylinder (15) is communicated with a garbage recycling box (21) through an air suction pipe (25), a first one-way valve (26) is fixed inside the air suction pipe (25), and a filter frame (27) is fixed on the inner side, close to the air suction pipe (25), of the garbage recycling box (21).
8. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 7, wherein: the first check valve (26) is used for one-way circulation from the garbage recycling box (21) to the piston cylinder (15).
9. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 1, wherein: cooling body includes water tank (28), water pipe (29), shower nozzle (30), water inlet (31), intake pipe (32) and second check valve (33), base (1) is close to the opposite side top of piston cylinder (15) and is fixed with water tank (28), bottom one side intercommunication of water tank (28) has water pipe (29), the bottom intercommunication of water pipe (29) has shower nozzle (30), water inlet (31) have been seted up on the top of water tank (28), the top opposite side of piston cylinder (15) is linked together through intake pipe (32) and water tank (28), the inside of intake pipe (32) is fixed with second check valve (33).
10. The integrated floor grooving and waste cleaning device for architectural decoration construction as claimed in claim 9, wherein: the second check valve (33) is communicated in a one-way mode in the direction from the piston cylinder (15) to the water tank (28).
CN202011511920.1A 2020-12-18 2020-12-18 Floor slotting and waste cleaning integrated device for architectural decoration construction Withdrawn CN112677341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011511920.1A CN112677341A (en) 2020-12-18 2020-12-18 Floor slotting and waste cleaning integrated device for architectural decoration construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011511920.1A CN112677341A (en) 2020-12-18 2020-12-18 Floor slotting and waste cleaning integrated device for architectural decoration construction

Publications (1)

Publication Number Publication Date
CN112677341A true CN112677341A (en) 2021-04-20

Family

ID=75450292

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011511920.1A Withdrawn CN112677341A (en) 2020-12-18 2020-12-18 Floor slotting and waste cleaning integrated device for architectural decoration construction

Country Status (1)

Country Link
CN (1) CN112677341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114808628A (en) * 2022-04-24 2022-07-29 青岛西海岸市政工程有限公司 Clear miscellaneous testing platform of trickle of being convenient for build is used in square construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114808628A (en) * 2022-04-24 2022-07-29 青岛西海岸市政工程有限公司 Clear miscellaneous testing platform of trickle of being convenient for build is used in square construction
CN114808628B (en) * 2022-04-24 2024-02-06 青岛西海岸市政工程有限公司 Convenient-to-build water spraying impurity removal detection platform for square construction

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Application publication date: 20210420

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