CN214863944U - A collection device for concrete production waste material - Google Patents

A collection device for concrete production waste material Download PDF

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Publication number
CN214863944U
CN214863944U CN202120743143.7U CN202120743143U CN214863944U CN 214863944 U CN214863944 U CN 214863944U CN 202120743143 U CN202120743143 U CN 202120743143U CN 214863944 U CN214863944 U CN 214863944U
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China
Prior art keywords
box
pipe
close
collection
screening frame
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Active
Application number
CN202120743143.7U
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Chinese (zh)
Inventor
燕肖宁
褚建伟
李凯强
张辉
王斌
王悦
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Dongying Zhonglian Concrete Co ltd
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Dongying Zhonglian Concrete Co ltd
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Priority to CN202120743143.7U priority Critical patent/CN214863944U/en
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Abstract

The utility model discloses a collecting device for waste slag in concrete production, which comprises a bottom plate and a box body, a movable door is arranged on the front wall of the box body near the bottom, the box body is fixedly connected on the top of the bottom plate, the right side of the box body is provided with a feeding pipe which is arranged obliquely, the left side of the feeding pipe is not closed, a mounting groove is arranged on the right side wall of the box body near the top, the top end of the feed pipe passes through the mounting groove and extends into the box body, the front wall and the rear wall of the feeding pipe are movably connected with the inner wall of the mounting groove through a rotating shaft and a bearing, rotating rollers are respectively arranged in the feeding pipe close to the left side and the right side, the front wall and the rear wall of the two rotating rollers are movably connected with the inner wall of the feeding pipe through a rotating shaft and a bearing, and the transmission is connected with the conveyer belt between two live-rollers, the utility model discloses a series of structures make this device have characteristics such as convenient and collection efficiency height of use.

Description

A collection device for concrete production waste material
Technical Field
The utility model relates to a concrete production technical field specifically is a collection device for concrete production waste residue material.
Background
Concrete is the essential substrate in the construction, generally mix by cement, sand, stone and water in proportion and become, there are withstand voltage, water-fast, performance such as fire resistance after the induration, concrete can produce some waste residue material in process of production, and these waste residue material can be recycled after being collected, with improve resource utilization efficiency, practice thrift the cost, but current waste residue material is used inconveniently in the collection process, and can not carry out the preliminary treatment to the waste residue material after collecting, thereby lead to the collection efficiency of this device low, application scope is narrow.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in overcoming prior art's use defect such as inconvenient and collection efficiency low, provide a collection device for concrete production waste residue material. A collection device for concrete production waste residue has characteristics such as convenient and fast and collection efficiency height of using.
In order to achieve the above object, the utility model provides a following technical scheme: a collecting device for waste slag in concrete production comprises a bottom plate and a box body, wherein a movable door is installed on the front wall of the box body close to the bottom, the top of the bottom plate is fixedly connected with the box body, the right side of the box body is provided with an inlet pipe, the inlet pipe is arranged in an inclined mode, the left side of the inlet pipe is not sealed, a mounting groove is formed in the side wall of the right side of the box body close to the top, the top end of the inlet pipe penetrates through the mounting groove and extends into the box body, the front wall and the rear wall of the inlet pipe are movably connected with the inner wall of the mounting groove through a rotating shaft and a bearing, rotating rollers are respectively arranged in the inlet pipe close to the left side and the right side, the front wall and the rear wall of the two rotating rollers are movably connected with the inner wall of the inlet pipe through a rotating shaft and a bearing, a conveying belt is connected between the two rotating rollers in a transmission mode, a plurality of partition plates are fixedly connected onto the conveying belt, and a feed inlet is formed in the position of the inlet pipe close to the right side, and the rear wall of the inlet pipe is provided with a first motor near the right side, the rotating shaft on the rear wall of the rotating roller on the right side penetrates through the inner ring of the bearing and is fixedly connected with the output shaft of the first motor, the inner cavity of the box body is provided with a screening frame near the middle, the rear wall of the screening frame is movably connected with the inner wall of the rear side of the box body, the bottom of the screening frame is provided with a plurality of through holes, the through holes are gradually reduced from left to right, two first rolling rollers are arranged above the screening frame, the front walls and the rear walls of the two first rolling rollers are respectively movably connected with the inner wall of the box body through rotating shafts and bearings, the rear wall of the box body is provided with a second motor near the right side, the rotating shaft on the rear wall of the first rolling roller on the right side penetrates through the inner ring of the bearing and is fixedly connected with the output shaft of the second motor, and five second rolling rollers are sequentially arranged from left to right below the screening frame, and the antetheca and the back wall of five second rolls the roller respectively through pivot and bearing and box inner wall swing joint, be located the left and right sides the second rolls the roller and is located in the middle the second rolls the inner circle that the pivot on the wall passed the bearing behind the roller outside extending to the box, and mutual transmission is connected with first belt, is located the rightmost side the transmission is connected with the second belt between the pivot on the second rolls the roller and is located the first roll of right side back wall on the pivot, swing joint has the collection frame on the inner chamber bottom of box.
Preferably, the right side of box is close to bottom department and is provided with the U-shaped board, and the opening of U-shaped board down, the bottom of U-shaped board and the top fixed connection of bottom plate, and turn right from a left side and have set gradually slender pole and electric telescopic handle in the top of U-shaped board, the back wall of slender pole and electric telescopic handle is close to top department swing joint has the connection piece, and the top of connection piece and the bottom fixed connection of inlet pipe, the slender pole overcoat is equipped with expanding spring and pipe, and expanding spring's both ends difference the bottom of connection piece and the top fixed connection of pipe, the bottom of electric telescopic handle's bottom and pipe respectively with the top fixed connection of U-shaped board.
Preferably, be close to left and right sides department on the back wall of screening frame and install first slider, set up on the rear inner wall of box with first slider assorted first spout, be close to left side fixedly connected with straight board of department on the top of screening frame, and install the second slider on the top of straight board, set up on the inner chamber top of box with second slider assorted second spout, fixedly connected with second electric telescopic handle on the right side lateral wall of straight board, and second electric telescopic handle installs on the inner chamber top of box.
Preferably, fixedly connected with passage on the right side lateral wall of straight board, and fixedly connected with suction head on the right side lateral wall of passage, the lateral wall that the lateral wall of suction head runs through the passage is linked together rather than, the left side of box is provided with the dust collection box, and swing joint has the case lid on the top of dust collection box, installs the dust catcher on the top of case lid, the row's material pipe has been cup jointed on the bottom bin outlet of dust catcher, and the bottom of arranging the material pipe runs through the case lid and extends to the dust collection box in, swing joint has the circulating pipe on the top feed inlet of dust catcher, be close to top department on the left side lateral wall of box and offer with circulating pipe assorted round hole, and the top of circulating pipe passes the through-hole and runs through the lateral wall of straight board and passage in proper order.
Preferably, the below of screening frame is close to left and right sides department and is provided with the swash plate, and the lateral wall of swash plate and the inner wall fixed connection of box, two from last two fixed blocks that down have set gradually of top of swash plate, and the fixed block with the screening frame one side of keeping away from mutually with the inner wall fixed connection of box, fixedly connected with rubber pad on the fixed block and the relative lateral wall of screening frame.
Preferably, the bottom of the collecting frame is fixedly connected with third sliding blocks close to the left side and the right side respectively, and a third sliding groove matched with the third sliding blocks is formed in the bottom of the inner cavity of the box body.
Preferably, the spacing between five second rolling rollers is gradually reduced from left to right.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model can conveniently adjust the position of the feeding port on the feeding pipe through the mutual matching of the first electric telescopic rod, the thin rod, the round pipe, the telescopic spring, the connecting sheet and other parts, so that the use is convenient;
2. the utility model discloses a first roll roller, second roll roller, screening frame, first motor, second motor, the mutually supporting between each parts such as second electric telescopic handle to can realize carrying out broken preliminary treatment to the waste residue material of collecting, and then can effectual improvement collection efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a cross-sectional top view of the feed tube of FIG. 1;
FIG. 4 is a cross-sectional top view of the first lamination roll of FIG. 1;
fig. 5 is a cross-sectional top view of the second laminating roller of fig. 1.
Reference numbers in the figures: 1. a base plate; 2. a box body; 3. a feed pipe; 4. a rotating roller; 5. a conveyor belt; 6. a partition plate; 7. a U-shaped plate; 8. a first electric telescopic rod; 9. a thin rod; 10. a collection frame; 11. a dust collection box; 12. a vacuum cleaner; 13. a straight plate; 14. a second electric telescopic rod; 15. a material guide pipe; 16. a circulation pipe; 17. a first rolling roller; 18. screening the frame; 19. a sloping plate; 20. a second rolling roller; 21. a first motor; 22. a second motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a collecting device for waste slag materials in concrete production comprises a bottom plate 1 and a box body 2, a movable door is installed on the front wall of the box body 2 close to the bottom, the box body 2 is fixedly connected to the top of the bottom plate 1, a feeding pipe 3 is arranged on the right side of the box body 2, the feeding pipe 3 is arranged in an inclined mode, the left side of the feeding pipe 3 is not sealed, a mounting groove is formed in the side wall of the right side of the box body 2 close to the top, the top end of the feeding pipe 3 penetrates through the mounting groove and extends into the box body 2, the front wall and the rear wall of the feeding pipe 3 are movably connected with the inner wall of the mounting groove through a rotating shaft and a bearing, a U-shaped plate 7 is arranged on the right side of the box body 2 close to the bottom, an opening of the U-shaped plate 7 faces downwards, the bottom of the U-shaped plate 7 is fixedly connected with the top of the bottom plate 1, a thin rod 9 and a first electric telescopic rod 8 are sequentially arranged above the U-shaped plate 7 from left to right, a connecting sheet 9 and a rear wall of the first electric telescopic rod 8 is movably connected with a connecting sheet close to the top end, and the top of the connecting sheet is fixedly connected with the bottom of the feeding pipe 3, the thin rod 9 is sleeved with a telescopic spring and a round pipe, the two ends of the telescopic spring are respectively fixedly connected with the bottom of the connecting sheet and the top of the round pipe, the bottom of the first electric telescopic rod 8 and the bottom of the round pipe are respectively fixedly connected with the top of the U-shaped plate 7, the telescopic spring is matched with each other through the first electric telescopic rod 8, the thin rod 9, the round pipe, the telescopic spring and the connecting sheet, thereby the position of the feeding port on the feeding pipe 3 can be conveniently adjusted, the use is convenient, the rotating rollers 4 are respectively arranged in the feeding pipe 3 near the left side and the right side, the front wall and the rear wall of the two rotating rollers 4 are movably connected with the inner wall of the feeding pipe 3 through a rotating shaft and a bearing, the conveying belt 5 is connected between the two rotating rollers 4 in a transmission manner, a plurality of partition plates 6 are fixedly connected on the conveying belt 5, the feeding port is arranged near the right side on the top of the feeding pipe 3, a first motor 21 is arranged on the rear wall of the feeding pipe 3 close to the right side, a rotating shaft on the rear wall of a rotating roller 4 on the right side penetrates through an inner ring of a bearing and is fixedly connected with an output shaft of the first motor 21, a screening frame 18 is arranged in the inner cavity of the box body 2 close to the middle, the rear wall of the screening frame 18 is movably connected with the inner wall of the rear side of the box body 2, first sliding blocks are arranged on the rear wall of the screening frame 18 close to the left side and the right side, a first sliding groove matched with the first sliding block is formed in the inner wall of the rear side of the box body 2, a straight plate 13 is fixedly connected with the top of the screening frame 18 close to the left side, a second sliding block is arranged on the top of the straight plate 13, a second sliding groove matched with the second sliding block is formed in the top of the inner cavity of the box body 2, a second electric telescopic rod 14 is fixedly connected with the side wall of the right side of the straight plate 13, and the second electric telescopic rod 14 is arranged on the top of the inner cavity of the box body 2, the bottom of the screening frame 18 is provided with a plurality of through holes which are gradually reduced from left to right, two first rolling rollers 17 are arranged above the screening frame 18, the front walls and the rear walls of the two first rolling rollers 17 are respectively movably connected with the inner wall of the box body 2 through rotating shafts and bearings, a second motor 22 is arranged on the rear wall of the box body 2 close to the right side, the rotating shaft on the rear wall of the first rolling roller 17 on the right side penetrates through the inner ring of the bearing to be fixedly connected with the output shaft of the second motor 22, inclined plates 19 are arranged below the screening frame 18 close to the left side and the right side, the side walls of the inclined plates 19 are fixedly connected with the inner wall of the box body 2, two fixed blocks are sequentially arranged above the two inclined plates 19 from top to bottom, the side, far away from the screening frame 18, is fixedly connected with the inner wall of the box body 2, and a rubber pad is fixedly connected on the side wall of the fixed block opposite to the screening frame 18, five second rolling rollers 20 are sequentially arranged from left to right below the screening frame 18, front walls and rear walls of the five second rolling rollers 20 are respectively movably connected with the inner wall of the box body 2 through rotating shafts and bearings, the rotating shafts on the second rolling rollers 20 at the left side and the right side and the rear wall of the second rolling roller 20 in the middle extend out of the box body 2 through inner rings of the bearings and are mutually connected with a first belt in a transmission manner, a second belt is connected between the rotating shaft on the second rolling roller 20 at the rightmost side and the rotating shaft on the rear wall of the first rolling roller 17 at the right side in a transmission manner, the distance between the five second rolling rollers 20 is gradually reduced from left to right, the bottom of the inner cavity of the box body 2 is movably connected with a collecting frame 10, third sliding blocks are respectively and fixedly connected to the bottom of the collecting frame 10 close to the left side and the right side, and a third sliding groove matched with the third sliding blocks is formed in the bottom of the inner cavity of the box body 2, through the mutual matching of the parts such as the first rolling roller 17, the second rolling roller 20, the screening frame 18, the first motor 21, the second motor 22, the second electric telescopic rod 14 and the like, the collected waste residue can be crushed and pretreated, and the collection efficiency can be effectively improved;
a material guide pipe 15 is fixedly connected on the right side wall of the straight plate 13, a suction head is fixedly connected on the right side wall of the material guide pipe 15, the side wall of the suction head penetrates through the side wall of the material guide pipe 15 and is communicated with the material guide pipe, a dust collection box 11 is arranged on the left side of the box body 2, a box cover is movably connected on the top of the dust collection box 11, a dust collector 12 is installed on the top of the box cover, a material discharge pipe is sleeved on a material discharge port at the bottom of the dust collector 12, the bottom end of the material discharge pipe penetrates through the box cover and extends into the dust collection box 11, a circulating pipe 16 is movably connected on a material inlet at the top of the dust collector 12, a round hole matched with the circulating pipe 16 is formed in the position, close to the top, on the left side wall of the box body 2, the top end of the circulating pipe 16 penetrates through the through hole and sequentially penetrates through the side walls of the straight plate 13 and the material guide pipe 15, the circulating pipe 16 and the material discharge pipe are mutually matched, so that dust generated in the working process can be sucked into the dust collection box 11, and then can effectual clean the inside operational environment of this device, improve the life of internal device, first motor 21, second motor 22, dust catcher 12, first electric telescopic handle 8 and second electric telescopic handle 14 are respectively through external power cord electric connection with control switch.
The working principle is as follows: when the utility model is used, the first electric telescopic rod 8 is started at first, the first electric telescopic rod 8 drives the feeding pipe 3 to deflect on the box body 2 when moving, so that the position of the feeding hole is convenient for feeding, at the moment, the thin rod 9 slides upwards or downwards in the round pipe, the telescopic spring is in a stretching or compressing state, after the adjustment is completed, the first electric telescopic rod 8 is closed, the first motor 21, the second motor 22, the dust collector 12 and the second electric telescopic rod 14 are started, waste residue is guided into the feeding pipe 3 through the feeding hole, the first motor 21 drives the rotating rollers 4 to rotate, the conveying belt 5 carries out a small amount of continuous conveying on the waste residue, the conveyed waste residue finally falls into the two first rolling rollers 17, the second motor 22 drives the first rolling roller 17 on the right side to rotate, and under the simultaneous action of material gravity, the two first rolling rollers 17 move relatively, the waste residue material is primarily rolled and crushed, the crushed waste residue material falls into the sieving frame 18, the second electric telescopic rod 14 drives the sieving frame 18 to do reciprocating motion left and right through the straight plate 13, thereby realizing the size sieving of the waste residue material, the sieving frame 18 is contacted with the side wall of the fixed block in the motion process to generate vibration, thereby effectively promoting the sieving effect, the through hole on the sieving frame 18 is not easy to be blocked, the sieved waste residue material falls onto the second grinding roller 20, under the transmission action of the first belt and the second belt, the second grinding roller 20 rotates to crush the waste residue material again, the crushed waste residue material falls into the collecting frame 10 to complete the final collection, the dust collector 12 is arranged in the device, the dust generated in the crushing process can be sucked into the dust collecting box 11 through the suction head, the guide pipe 15, the circulating pipe 16 and the discharge pipe, thereby effectively cleaning the internal working environment of the device, the service life of the internal device is prolonged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a collection device for concrete production waste material, includes bottom plate (1) and box (2), be close to bottom department on the antetheca of box (2) and install dodge gate, its characterized in that: fixedly connected with box (2) on the top of bottom plate (1), and the right side of box (2) is provided with inlet pipe (3), inlet pipe (3) are the slope setting, and the left side of inlet pipe (3) is not sealed, the mounting groove has been seted up near top department on the right side lateral wall of box (2), the top of inlet pipe (3) is passed the mounting groove and is extended to in box (2), and the antetheca and the back wall of inlet pipe (3) are through the inner wall swing joint of pivot and bearing and mounting groove, be close to left and right sides department in inlet pipe (3) and be provided with live-rollers (4) respectively, and the antetheca and the back wall of two live-rollers (4) are through the inner wall swing joint of pivot and bearing and inlet pipe (3) to the transmission is connected with conveyer belt (5) between two live-rollers (4), fixedly connected with a plurality of baffles (6) on conveyer belt (5), the feed inlet is formed in the position, close to the right side, of the top of the inlet pipe (3), a first motor (21) is installed in the position, close to the right side, of the rear wall of the inlet pipe (3), the rotating shaft on the rear wall of the rotating roller (4) on the right side penetrates through an inner ring of a bearing and an output shaft of the first motor (21) and is fixedly connected with the inner ring of the rear wall of the rotating roller (4) on the right side, a screening frame (18) is arranged in the position, close to the middle, of an inner cavity of the box body (2), the rear wall of the screening frame (18) is movably connected with the inner wall of the box body (2), a plurality of through holes are formed in the bottom of the screening frame (18), the plurality of through holes are gradually reduced from left to right, two first rolling rollers (17) are arranged above the screening frame (18), the front wall and the rear wall of the two first rolling rollers (17) are movably connected with the inner wall of the box body (2) through the rotating shaft and the bearing respectively, and a second motor (22) is installed in the position, close to the right side, of the rear wall of the box body (2), a rotating shaft on the rear wall of the first rolling roller (17) on the right side penetrates through an inner ring of the bearing and is fixedly connected with an output shaft of a second motor (22), five second rolling rollers (20) are sequentially arranged from left to right below the screening frame (18), the front wall and the rear wall of the five second rolling rolls (20) are respectively movably connected with the inner wall of the box body (2) through rotating shafts and bearings, the second rolling rolls (20) positioned at the left side and the right side and the rotating shaft positioned on the rear wall of the second rolling roll (20) positioned in the middle penetrate through the inner ring of the bearing and extend out of the box body (2), and are mutually connected with a first belt in a transmission way, a second belt is connected between a rotating shaft on the second rolling roller (20) positioned at the rightmost side and a rotating shaft on the rear wall of the first rolling roller (17) positioned at the right side in a transmission way, the bottom of the inner cavity of the box body (2) is movably connected with a collecting frame (10).
2. A collection device for concrete production waste residue according to claim 1, characterised in that: the utility model discloses a solar energy collection box, including box (2), bottom and inlet pipe (3), the right side of box (2) is close to bottom department and is provided with U-shaped plate (7), and the opening of U-shaped plate (7) down, the bottom of U-shaped plate (7) and the top fixed connection of bottom plate (1), and turn right from a left side and have set gradually slender pole (9) and first electric telescopic handle (8) in the top of U-shaped plate (7), the back wall of slender pole (9) and first electric telescopic handle (8) is close to top department swing joint and has the connection piece, and the top of connection piece and the bottom fixed connection of inlet pipe (3), slender pole (9) overcoat is equipped with expanding spring and pipe, and expanding spring's both ends are the bottom of connection piece respectively and the top fixed connection of pipe, the bottom of first electric telescopic handle (8) and the bottom of pipe respectively with the top fixed connection of U-shaped plate (7).
3. A collection device for concrete production waste residue according to claim 1, characterised in that: the utility model discloses a screening frame, including screening frame (18), left and right sides department installs first slider on the back wall of screening frame (18), set up on the rear side inner wall of box (2) with first slider assorted first spout, be close to left side department fixedly connected with straight board (13) on the top of screening frame (18), and install the second slider on the top of straight board (13), set up on the inner chamber top of box (2) with second slider assorted second spout, fixedly connected with second electric telescopic handle (14) on the right side lateral wall of straight board (13), and second electric telescopic handle (14) are installed on the inner chamber top of box (2).
4. A collection device for concrete production waste residues according to claim 3, characterized in that: a material guide pipe (15) is fixedly connected on the right side wall of the straight plate (13), a suction head is fixedly connected on the right side wall of the material guide pipe (15), the side wall of the suction head penetrates through the side wall of the material guide pipe (15) to be communicated with the material guide pipe, a dust collection box (11) is arranged on the left side of the box body (2), a box cover is movably connected on the top of the dust collection box (11), a dust collector (12) is arranged on the top of the box cover, a discharge pipe is sleeved on a discharge port at the bottom of the dust collector (12), the bottom end of the discharge pipe penetrates through the case cover and extends into the dust collection case (11), a feed inlet at the top of the dust collector (12) is movably connected with a circulating pipe (16), a round hole matched with the circulating pipe (16) is arranged on the left side wall of the box body (2) near the top, and the top end of the circulating pipe (16) penetrates through the through hole and sequentially penetrates through the straight plate (13) and the side wall of the material guide pipe (15).
5. A collection device for concrete production waste residue according to claim 1, characterised in that: the below of screening frame (18) is close to left and right sides department and is provided with swash plate (19), and the lateral wall of swash plate (19) and the inner wall fixed connection of box (2), two the top of swash plate (19) is from last down having set gradually two fixed blocks, and the fixed block with screen frame (18) one side of keeping away from mutually and the inner wall fixed connection of box (2), fixedly connected with rubber pad on the fixed block and the relative lateral wall of screening frame (18).
6. A collection device for concrete production waste residue according to claim 1, characterised in that: the bottom of the collecting frame (10) is fixedly connected with third sliding blocks close to the left side and the right side respectively, and third sliding grooves matched with the third sliding blocks are formed in the bottom of the inner cavity of the box body (2).
7. A collection device for concrete production waste residue according to claim 1, characterised in that: the distance between the five second rolling rollers (20) is gradually reduced from left to right.
CN202120743143.7U 2021-04-13 2021-04-13 A collection device for concrete production waste material Active CN214863944U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120743143.7U CN214863944U (en) 2021-04-13 2021-04-13 A collection device for concrete production waste material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120743143.7U CN214863944U (en) 2021-04-13 2021-04-13 A collection device for concrete production waste material

Publications (1)

Publication Number Publication Date
CN214863944U true CN214863944U (en) 2021-11-26

Family

ID=78949542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120743143.7U Active CN214863944U (en) 2021-04-13 2021-04-13 A collection device for concrete production waste material

Country Status (1)

Country Link
CN (1) CN214863944U (en)

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