CN114308651A - Screening device for cold patch asphalt processing - Google Patents
Screening device for cold patch asphalt processing Download PDFInfo
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- CN114308651A CN114308651A CN202210059405.7A CN202210059405A CN114308651A CN 114308651 A CN114308651 A CN 114308651A CN 202210059405 A CN202210059405 A CN 202210059405A CN 114308651 A CN114308651 A CN 114308651A
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Abstract
The invention relates to the technical field of asphalt processing, in particular to a screening device for cold patch asphalt processing, which comprises: the screening assembly is arranged on the inner side of the shell; the supporting mechanism is arranged on the outer side of the shell and is connected with the screening assembly; the guide driving mechanism is connected with the shell and the supporting mechanism; wherein the guide driving mechanism includes: the control assembly is fixedly connected with the shell and is connected with the supporting mechanism; the guide assembly is arranged on the inner side of the shell wall of the shell and is connected with the control assembly; the collecting box through setting up direction actuating mechanism, utilizes control assembly and direction subassembly to realize the flow of air for the pitch granule that is selected can be accurate and stable fall into the collecting box inboard, avoids appearing the phenomenon that pitch scatters everywhere, makes things convenient for people to accomplish the screening and the collection to pitch.
Description
Technical Field
The invention relates to the technical field of asphalt processing, in particular to a screening device for cold patch asphalt processing.
Background
In road maintenance engineering, compared with the traditional hot high-temperature repair concept, the repair by adopting a normal temperature or a low temperature cold state is cold repair. The cold patching material is a cold patching material, and specifically, the asphalt cold patching material is a mixture formed by mixing unheated mineral aggregate (aggregate) and diluted asphalt. According to the mixing form, two types can be distinguished: mixing in factory and mixing in site. Before 1998, the urban road engineering in China has no cold patching material in the true sense, and only water-based emulsified asphalt material is used for normal-temperature patching. After 2000 years, the cold patch material is popularized and applied on national roads, provincial roads and municipal roads as a product with higher technological content.
When adding man-hour to graininess cold patch pitch, need screen the cold patch pitch, the pitch granule side that meets the requirements can be put into use, sieving mechanism among the prior art is when screening graininess pitch, pitch through the sieve case can scatter everywhere, the not convenient to use person collects, user's working strength has been increased, the not convenient to use person uses, consequently, to above current situation, the urgent need develops a sieving mechanism for cold patch pitch processing, in order to overcome not enough in the current practical application.
Disclosure of Invention
The invention aims to provide a screening device for cold patch asphalt processing, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a screening device is used in cold patch pitch processing, includes:
the screening assembly is arranged on the inner side of the shell;
the supporting mechanism is arranged on the outer side of the shell and is connected with the screening assembly;
the guide driving mechanism is connected with the shell, is connected with the supporting mechanism and is used for driving the supporting mechanism to move along the supporting mechanism and guiding and collecting screened asphalt particles;
wherein the guide driving mechanism includes:
the control assembly is fixedly connected with the shell, is connected with the supporting mechanism and is used for driving air to flow and realizing vibration of the shell;
the guide assembly is arranged on the inner side of the shell wall of the shell, is connected with the control assembly and is used for matching with the control assembly to guide and decelerate the asphalt particles;
the collecting box is arranged between the shell and the supporting mechanism and used for matching with the guide assembly to complete the collection of the asphalt.
Compared with the prior art, the invention has the beneficial effects that:
when the device is operated, the control component can drive the supporting mechanism to realize the up-and-down vibration of the shell, the supporting mechanism can also realize the transverse reciprocating motion of the screening component, and further the effective screening of asphalt particles is completed, meanwhile, the control component can also drive the air to flow, the flowing air is discharged through the guide component, the discharged air can decelerate the falling asphalt particles on one hand, so that the falling asphalt particles can stably fall into the inner side of the collecting box, on the other hand, the asphalt particles at the edge can be driven to move towards the center of the shell, so that the asphalt particles can accurately fall into the inner side of the collecting box, the air in the shell can be discharged only from the bottom end, the discharged air acts on the collecting box, the asphalt particles falling into the collecting box can be ensured to be always stable, the application is equivalent to that when the screening device in the prior art screens the granular asphalt, the asphalt passing through the screening box can scatter to four places, the not convenient to use person collects, through setting up direction actuating mechanism, utilizes control assembly and direction subassembly to realize the flow of air for the pitch granule that is selected can be accurate and stable fall into the collecting box inboard, avoids appearing the phenomenon that pitch scatters everywhere, makes things convenient for people to accomplish the screening and the collection to pitch.
Drawings
Fig. 1 is a schematic structural diagram of a screening device for cold patch asphalt processing.
Fig. 2 is a schematic structural diagram of a control box in the screening device for cold patch asphalt processing.
FIG. 3 is a schematic structural diagram of a transmission assembly in the screening device for cold patch asphalt processing.
Fig. 4 is an enlarged schematic view of a portion a in fig. 1.
FIG. 5 is a schematic structural diagram of a sieve box in the screening device for cold patch asphalt processing.
In the figure: 1-bottom plate, 2-supporting column, 3-supporting seat, 4-shell, 5-top cover, 6-sieve box, 7-limiting groove, 8-control rod, 9-air guide groove, 10-air blowing hole, 11-collecting box, 12-air guide pipe, 13-threaded rod, 14-control box, 15-driving piece, 16-driving rod, 17-first gear, 18-second gear, 19-air guide box, 20-fan, 21-filtering piece, 22-movable frame, 23-guide rod, 24-driving rod, 25-incomplete gear, 26-first rack, 27-second rack, 28-driven rod, 29-third gear, 30-first belt wheel, 31-first belt, 32-supporting frame, 33-a limiting plate, 34-a connecting rod, 35-a second belt wheel, 36-a second belt and 37-a limiting block.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Referring to fig. 1, in an embodiment of the present invention, a screening apparatus for cold patch asphalt processing includes: the screening device comprises a shell 4 and a screening component, wherein the screening component is arranged on the inner side of the shell 4; the supporting mechanism is arranged on the outer side of the shell 4 and is connected with the screening assembly; the guide driving mechanism is connected with the shell 4, is connected with the supporting mechanism, and is used for driving the supporting mechanism to move along the supporting mechanism and realizing the guide and collection of the screened asphalt particles; wherein the guide driving mechanism includes: the control assembly is fixedly connected with the shell 4, is connected with the supporting mechanism and is used for driving air to flow and realizing vibration of the shell 4; the guiding assembly is arranged on the inner side of the shell wall of the shell 4, is connected with the control assembly and is used for matching with the control assembly to guide and decelerate asphalt particles; and the collecting box 11 is arranged between the shell 4 and the supporting mechanism and is used for matching with the guide assembly to complete the collection of the asphalt.
In this embodiment, the collecting box 11 is detachably connected to the supporting mechanism, the detachable connection is a snap connection, when the device is operated, the control assembly can drive the supporting mechanism to realize the up-and-down vibration of the housing 4, and the supporting mechanism can also realize the transverse reciprocating motion of the screening assembly, so as to complete the effective screening of the asphalt particles, and at the same time, the control assembly can also drive the air flow, the flowing air is discharged through the guiding assembly, the discharged air can decelerate the falling asphalt particles, so that the falling asphalt particles can stably fall into the inner side of the collecting box 11, on the other hand, the edge asphalt particles can be driven to move towards the center of the housing 4, so that the asphalt particles can accurately fall into the inner side of the collecting box 11, the air in the housing 4 can only be discharged from the bottom end, and the discharged air acts on the collecting box 11, so as to ensure that the asphalt particles falling into the collecting box 11 can be always kept stable, this application is equivalent to prior art in the sieving mechanism when screening graininess pitch, pitch through the sieve case can scatter everywhere, and the person of being not convenient for collects, through setting up direction actuating mechanism, utilizes control assembly and direction subassembly to realize the flow of air for the pitch granule that is selected can be accurate and stable fall into collecting box 11 inboardly, avoids appearing the phenomenon that pitch scatters everywhere, makes things convenient for people to accomplish the screening and the collection to pitch.
In one embodiment of the present invention, the substrate is,
in this embodiment, the hole 10 of blowing is in from the top down has set gradually a plurality ofly on the inboard conch wall of casing 4, wherein, it is cyclic annular equidistance evenly distributed to lead the gas tank 9 outside, through setting up a plurality of holes 10 of blowing, can guarantee that the air that blows off can carry out effectual direction to pitch, make pitch can be stable fall into collecting box 11 inboardly, through setting up the direction subassembly, can lead to the pitch after being screened, make pitch can accurately fall into collecting box 11 inboardly, the sieving mechanism is when screening granular pitch for the processing of having solved current cold patch pitch, the pitch of screening can scatter everywhere, be not convenient for the user and collect, user's working strength has been increased, the problem that the user of not being convenient for used.
In one embodiment of the present invention, referring to fig. 2, the control assembly includes: the control box 14, the said control box 14 is fixedly connected with said body 4; the driving piece 15 is fixedly connected with the control box 14, and the output end of the driving piece 15 is connected with the driving rod 16; the air guide box 19 is fixedly connected to the inner side of the control box 14 and connected with the control box 14 through an air inlet pipe, and a fan 20 fixedly connected with the driving rod 16 is arranged on the inner side and used for matching with the driving piece 15 to drive air to flow; the air duct 12 is arranged between the guide assembly and the air guide box 19, and is used for conveying air to realize the guide of the guide assembly to the asphalt; and the transmission assembly is arranged between the driving rod 16 and the supporting mechanism and is used for matching the driving rod 16 to realize the vibration of the shell 4.
In this embodiment, the driving member 15 is fixedly connected to the top of the inner side of the control box 14, the driving member 15 is a driving motor or a driving motor, the driving rod 16 is fixedly connected to the outer side of the output end of the driving member 15, the air inlet pipe and the transmission assembly are respectively arranged on two sides of the driving member 15, the driving member 15 drives the driving rod 16 to rotate by setting the control assembly, the driving rod 16 can drive the fan 20 to rotate to realize air flow and guide the asphalt by using the flowing air to cooperate with the guide assembly, and can drive the transmission assembly, and the transmission assembly cooperates with the supporting mechanism to realize not only vibration of the shell 4 but also reciprocating motion of the screening assembly, thereby ensuring high screening efficiency;
in addition, the inside of the air guiding box 19 is provided with a filtering member 21, the filtering member 21 is connected to the air guiding box 19 in a clamping manner, wherein the filtering member 19 includes a filtering frame and a drying box, and the filtering member 21 is disposed between the fan 20 and the air guiding tube 12.
In one embodiment of the present invention, referring to fig. 3, the transmission assembly includes: a transmission rod 24, wherein the transmission rod 24 is rotatably connected with the control box 14 and is connected with the driving rod 16 through a gear piece; the movable frame 22 is arranged on the outer side of the transmission rod 24 and is in sliding connection with a guide rod 23 fixedly connected and arranged on the inner side of the control box 14; the first rack 26 is fixedly connected to the frame walls at the two ends of the inner side of the movable frame 22, is engaged with the incomplete gear 25 arranged on the outer side of the transmission rod 24, and is used for matching the transmission rod 24 to drive the movable frame 22 to reciprocate along the guide rod 23; the transmission part is arranged between the movable frame 22 and the supporting mechanism, is in rotating connection with the control box 14, and is used for matching with the movement driving supporting mechanism of the movable frame 22.
In this embodiment, the gear member includes a first gear 17 fixedly connected to the driving rod 16, a second gear 18 is fixedly connected to an outer side of the driving rod 24, and the second gear 18 is engaged with the first gear 17. Through setting up gear spare, can not only drive through actuating lever 16 the transfer line 24 is rotatory, can adjust the rotational speed moreover, guarantees the stability that casing 4 and screening subassembly removed, in addition, the driving medium is including setting up the driven lever 28 in the activity frame 22 outside, driven lever 28 with control box 14 rotates to be connected, just driven lever 28 outside fixed connection is provided with third gear 29, third gear 29 sets up with fixed connection and is in the second rack 27 meshing connection that activity frame 22 is gone out, driven lever 28 with link to each other through first band pulley 30 and first belt 31 between the supporting mechanism, first band pulley 30 with driven lever 28 fixed connection, through setting up drive assembly, can cooperate driving piece 15 and actuating lever 16 realize driven lever 28 clockwise and anticlockwise rotation in turn, driven lever 28 drives through first band pulley 30 and first belt 31 supporting mechanism, thereby effecting vibration of the housing 4 and reciprocating movement of the screening assembly.
In one embodiment of the present invention, the support mechanism includes: the bottom plate 1 is arranged on the outer side of the shell 4, and the two sides of the bottom plate 1 are fixedly connected with supporting columns 2; the supporting seat 3 is fixedly connected with the supporting column 2; the lifting assembly is arranged between the supporting seat 3 and the shell 4, is connected with the control assembly and is used for matching with the control assembly to realize the vibration of the shell 4; coupling assembling, coupling assembling locates lifting unit with between the screening subassembly, and with casing 4 links to each other for the cooperation lifting unit realizes the reciprocating motion of screening subassembly.
In this embodiment, through setting up supporting mechanism, the control assembly passes through the drive assembly drive lifting unit can realize the up-and-down motion of casing 4, and lifting unit and coupling assembling cooperation can be realized the horizontal reciprocating motion of screening subassembly, and then guaranteed that the screening subassembly can carry out comprehensive effectual screening to pitch, promoted screening efficiency greatly.
In one embodiment of the present invention, the lifting assembly comprises: the support frame 32, the support frame 32 is fixedly connected with the shell 4; a threaded rod 13, the threaded rod 13 with the support frame 32 rotates to be connected, with the supporting seat 3 threaded connection, and with the control assembly links to each other, is used for cooperating the control assembly realizes the lift of casing 4.
In this embodiment, threaded rod 13 and 3 threaded connection of supporting seat, the equal sliding connection in support frame 32 both sides be provided with threaded rod 13 fixed connection's limiting plate 33, threaded rod 13 outside fixed connection is provided with first band pulley 30, and through setting up lifting unit, driven lever 28 can drive threaded rod 13 rotatory, and threaded rod 13 carries out clockwise and anticlockwise rotation in turn, and threaded rod 13 can drive with supporting seat 3 and support frame 32 cooperation casing 4 is followed 3 conch walls of supporting seat carry out up-and-down repetitive motion.
In an embodiment of the present invention, referring to fig. 4, the connecting component includes: the connecting rod 34 is arranged on the outer side of the shell 4, is rotatably connected with a fixed frame fixedly connected and arranged on the outer side of the shell 4, and is connected with the screening assembly; and the connecting piece is arranged between the threaded rod 13 and the connecting rod 34 and is used for matching the threaded rod 13 to drive the screening assembly to reciprocate along the wall of the shell 4.
In this embodiment, the connecting piece includes that fixed connection sets up the second band pulley 35 in the threaded rod 13 and the connecting rod 34 outside, link to each other through second belt 36 between the second band pulley 35, connecting rod 34 with through bevel gear meshing connection between the screening subassembly, through setting up coupling assembling, can cooperate the rotation of threaded rod 13 to realize the reciprocating motion of screening subassembly to effectively promote device's screening efficiency.
In one embodiment of the invention, the screening assembly comprises: the screen box 6 is arranged on the inner side of the shell 4, and is in sliding connection with the shell 4 through a limiting piece; a control rod 8, control rod 8 with locating part threaded connection, with casing 4 rotates to be connected, and with coupling assembling links to each other, is used for the cooperation the coupling assembling drive sieve case 6 removes.
In this embodiment, the locating part includes that fixed connection sets up the stopper 37 in the sieve case 6 outside, stopper 37 is in with the setting spacing groove 7 sliding connection on the inboard conch wall of casing 4, spacing groove 7 inboard be provided with casing 4 rotates the control lever 8 of being connected, control lever 8 with connect through bevel gear meshing between the connecting rod 34, control lever 8 with stopper 37 threaded connection through setting up the screening subassembly, can cooperate the high-efficient screening of supporting mechanism completion to pitch, and then promote people's work efficiency.
In one embodiment of the invention, a top cover 5 is hinged to the outer side of the top end of the shell 4, and one end, far away from the hinged position, of the top cover 5 is clamped with the shell 4 through a buckle.
The screening device for cold patch asphalt processing is characterized in that a guide driving mechanism is arranged, air flow is realized by utilizing a control assembly and a guide assembly, screened asphalt particles can accurately and stably fall into the inner side of a collecting box 11, the phenomenon that asphalt scatters everywhere is avoided, people can conveniently screen and collect asphalt, the screened asphalt can be guided by arranging the guide assembly, so that the asphalt can accurately fall into the inner side of the collecting box 11, the problems that the screened asphalt scatters everywhere when the granular asphalt is screened by the conventional screening device for cold patch asphalt processing, the collection of users is inconvenient, the working strength of the users is increased, and the users use is inconvenient are solved, by arranging the control assembly, a driving piece 15 drives a driving rod 16 to rotate, and the driving rod 16 can drive a fan 20 to rotate to realize air flow on the one hand, the guide to the asphalt is completed by utilizing the cooperation of flowing air and the guide component, the transmission component can be driven on the other hand, the transmission component can be matched with the supporting mechanism to realize the vibration of the shell 4 and also realize the reciprocating motion of the screening component, so that the screening efficiency is ensured, the transmission component can be matched with the driving piece 15 and the driving rod 16 to realize the alternate clockwise and anticlockwise rotation of the driven rod 28, the driven rod 28 drives the supporting mechanism through the first belt wheel 30 and the first belt 31 to further realize the vibration of the shell 4 and the reciprocating motion of the screening component, the supporting mechanism is arranged, the control component drives the lifting component through the transmission component to realize the up-and-down reciprocating motion of the shell 4, the lifting component can realize the transverse reciprocating motion of the screening component by matching with the connecting component, and further the screening component can comprehensively and effectively screen the asphalt, the screening efficiency is greatly improved.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. The utility model provides a sieving mechanism is used in cold patch pitch processing which characterized in that includes:
the screening assembly is arranged on the inner side of the shell;
the supporting mechanism is arranged on the outer side of the shell and is connected with the screening assembly;
the guide driving mechanism is connected with the shell, is connected with the supporting mechanism and is used for driving the supporting mechanism to move along the supporting mechanism and guiding and collecting screened asphalt particles;
wherein the guide driving mechanism includes:
the control assembly is fixedly connected with the shell, is connected with the supporting mechanism and is used for driving air to flow and realizing vibration of the shell;
the guide assembly is arranged on the inner side of the shell wall of the shell, is connected with the control assembly and is used for matching with the control assembly to guide and decelerate the asphalt particles;
the collecting box is arranged between the shell and the supporting mechanism and used for matching with the guide assembly to complete the collection of the asphalt.
2. The screening apparatus for cold patch asphalt processing of claim 1, wherein the guiding assembly comprises: the air guide grooves are arranged on the inner side of the shell wall at the bottom end of the shell, are connected with the control assembly and are distributed annularly;
and the blowing hole is arranged on the shell wall on the inner side of the shell, is connected with the air guide groove and is used for matching with the control assembly to blow air into the shell to guide asphalt particles.
3. The screening apparatus for cold patch asphalt processing according to claim 2, wherein the control assembly comprises: the control box is fixedly connected with the shell;
the driving piece is fixedly connected with the control box, and the output end of the driving piece is connected with the driving rod;
the air guide box is fixedly connected to the inner side of the control box and is connected with the control box through an air inlet pipe, and a fan fixedly connected with the driving rod is arranged on the inner side of the air guide box and is used for matching with the driving piece to drive air to flow;
the air guide pipe is arranged between the guide component and the air guide box and used for conveying air to realize the guide of the guide component to the asphalt;
the transmission assembly is arranged between the driving rod and the supporting mechanism and used for matching the driving rod to realize the vibration of the shell.
4. The screening apparatus for cold patch asphalt processing of claim 3, wherein the transmission assembly comprises: the transmission rod is rotatably connected with the control box and is connected with the driving rod through a gear piece;
the movable frame is arranged on the outer side of the transmission rod and is in sliding connection with a guide rod fixedly connected and arranged on the inner side of the control box;
the first rack is fixedly connected to frame walls at two ends of the inner side of the movable frame, is meshed with an incomplete gear arranged on the outer side of the transmission rod, and is used for matching with the transmission rod to drive the movable frame to reciprocate along the guide rod;
the transmission part is arranged between the movable frame and the supporting mechanism, is rotatably connected with the control box and is used for matching with the movable frame to drive the supporting mechanism.
5. The screening apparatus for cold patch asphalt processing according to claim 2, wherein the supporting mechanism comprises: the bottom plate is arranged on the outer side of the shell, and two sides of the bottom plate are fixedly connected with support columns;
the supporting seat is fixedly connected with the supporting column;
the lifting assembly is arranged between the supporting seat and the shell, is connected with the control assembly and is used for matching with the control assembly to realize the vibration of the shell;
and the connecting assembly is arranged between the lifting assembly and the screening assembly, and is connected with the shell and used for matching the reciprocating motion of the screening assembly realized by the lifting assembly.
6. The screening apparatus for cold patch asphalt processing according to claim 5, wherein the lifting assembly comprises: the support frame is fixedly connected with the shell;
the threaded rod, the threaded rod with the support frame rotates to be connected, with supporting seat threaded connection, and with control assembly links to each other, is used for the cooperation control assembly realizes the lift of casing.
7. The screening apparatus for cold patch asphalt processing according to claim 6, wherein the connecting assembly comprises: the connecting rod is arranged on the outer side of the shell, is rotatably connected with a fixed frame fixedly connected and arranged on the outer side of the shell, and is connected with the screening assembly;
the connecting piece is arranged between the threaded rod and the connecting rod and used for matching with the threaded rod to drive the screening assembly to reciprocate along the wall of the shell.
8. The screening apparatus for cold patch asphalt processing according to claim 1, wherein the screening assembly comprises: the screen box is arranged on the inner side of the shell and is in sliding connection with the shell through a limiting piece;
the control lever, the control lever with locating part threaded connection, with the casing rotates to be connected, and with coupling assembling links to each other, is used for the cooperation coupling assembling drive the sieve case removes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210059405.7A CN114308651B (en) | 2022-01-19 | 2022-01-19 | Screening device for cold patch asphalt processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210059405.7A CN114308651B (en) | 2022-01-19 | 2022-01-19 | Screening device for cold patch asphalt processing |
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| Publication Number | Publication Date |
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| CN114308651A true CN114308651A (en) | 2022-04-12 |
| CN114308651B CN114308651B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210059405.7A Active CN114308651B (en) | 2022-01-19 | 2022-01-19 | Screening device for cold patch asphalt processing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7458746B1 (en) * | 2005-08-22 | 2008-12-02 | Zimmerman Harold M | Mobile asphalt production machine |
| CN107214094A (en) * | 2017-08-07 | 2017-09-29 | 银川金帮手信息科技有限公司 | Matrimony vine screening plant |
| CN210098210U (en) * | 2019-05-19 | 2020-02-21 | 浙江恒尊新材料科技有限公司 | Screening device for preparing ready-mixed mortar |
| CN112517364A (en) * | 2020-11-18 | 2021-03-19 | 秦福 | Construction device for bridge construction |
-
2022
- 2022-01-19 CN CN202210059405.7A patent/CN114308651B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7458746B1 (en) * | 2005-08-22 | 2008-12-02 | Zimmerman Harold M | Mobile asphalt production machine |
| CN107214094A (en) * | 2017-08-07 | 2017-09-29 | 银川金帮手信息科技有限公司 | Matrimony vine screening plant |
| CN210098210U (en) * | 2019-05-19 | 2020-02-21 | 浙江恒尊新材料科技有限公司 | Screening device for preparing ready-mixed mortar |
| CN112517364A (en) * | 2020-11-18 | 2021-03-19 | 秦福 | Construction device for bridge construction |
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| Publication number | Publication date |
|---|---|
| CN114308651B (en) | 2023-10-03 |
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