CN214194019U - Ultra-thin top facing bituminous mixture dumper - Google Patents
Ultra-thin top facing bituminous mixture dumper Download PDFInfo
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- CN214194019U CN214194019U CN202023097758.1U CN202023097758U CN214194019U CN 214194019 U CN214194019 U CN 214194019U CN 202023097758 U CN202023097758 U CN 202023097758U CN 214194019 U CN214194019 U CN 214194019U
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Abstract
The utility model discloses an ultra-thin top facing bituminous mixture dumper, including drawing the locomotive and with the frame that pulls the locomotive and be connected, the frame on be provided with the frame, the agitator tank box sets up in the frame, the upper portion and the lower part of agitator tank box are provided with feed inlet and discharge gate respectively, the below of discharge gate is provided with bituminous mixture conveyor, parallel arrangement first (mixing) shaft and second (mixing) shaft in the agitator tank box, frame one side is provided with drive arrangement, the synchronous antiport of first (mixing) shaft of drive arrangement drive and second (mixing) shaft, the crisscross stirring vane system that is provided with on first (mixing) shaft and the second (mixing) shaft, the agitator tank box outside is provided with box heating system, the inside top of agitator tank box still is provided with pitch spraying system. The utility model discloses can effectively adapt to bituminous mixture's the storage demand of mixing, guarantee bituminous mixture's the effect of mixing, lay the construction for the ultra-thin top facing on road surface and provide good material basis.
Description
Technical Field
The utility model relates to a dumper especially relates to an ultra-thin top facing bituminous mixture dumper.
Background
At present, an ultrathin overlay is widely applied to the fields of highway construction and the like as a preventive or corrective maintenance material, and has the effects of improving the construction depth, improving the flatness, repairing light diseases, reducing noise and the like. Engineering practice proves that the ultrathin covering coat formed by the asphalt mixture can prolong the service life of a road surface by more than 6-8 years, and can effectively increase the skid resistance of wheels.
In the process of constructing the ultrathin overlay pavement, the asphalt mixture serving as a raw material is stirred and then is transported to a section to be paved by an ultrathin overlay asphalt mixture transport vehicle, and then ultrathin overlay pavement construction is carried out on the pavement by an asphalt paving vehicle. Most of the existing various material transporting vehicles do not have the mixing function. A few material transporting vehicles with a mixing function cannot guarantee the storage and mixing requirements of asphalt chaotic materials due to the fact that heating equipment is not provided, and can seriously affect the laying of ultrathin asphalt finish coatings of pavements due to the fact that asphalt mixtures are separated due to too low temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultra-thin top facing bituminous mixture dumper can adapt to bituminous mixture's the storage demand that mixes, guarantees bituminous mixture's the effect of mixing, lays the construction for the ultra-thin top facing on road surface and provides good material basis.
The utility model adopts the following technical proposal:
the utility model provides an ultra-thin top facing bituminous mixture dumper, including drawing the locomotive and with draw the frame that the locomotive is connected, the frame on be provided with the frame, the agitator tank box sets up in the frame, the upper portion and the lower part of agitator tank box are provided with feed inlet and discharge gate respectively, the below of discharge gate is provided with bituminous mixture conveyor, parallel arrangement first (mixing) shaft and second (mixing) shaft in the agitator tank box, frame one side is provided with drive arrangement, drive arrangement drives the synchronous antiport of first (mixing) shaft and second (mixing) shaft, crisscross stirring vane system that is provided with on first (mixing) shaft and the second (mixing) shaft, the agitator tank box outside is provided with box heating system, the inside top of agitator tank box still is provided with pitch spraying system.
The rear end of the frame is hinged with the frame through a rear support leg, the front end of the frame is provided with a front support leg, a hydraulic lifting system is arranged between the front end of the frame and the front end of the frame, a discharge port is arranged at the lower part of the rear end of the stirring box body, an asphalt mixture conveying device is arranged between the frame and the frame in a sliding manner, and when the asphalt mixture conveying device is stored, the tail part of the asphalt mixture conveying device is positioned between the frame and the frame; when the asphalt mixture conveying device is unfolded, the tail part of the asphalt mixture conveying device is positioned outside the frame and the rack.
The asphalt mixture conveying device adopts a conveyor belt system, the conveyor belt system comprises a conveyor belt and a conveyor belt rack, and the lower end of the conveyor belt rack is connected with the frame in a sliding manner.
The two ends of the first stirring shaft and the second stirring shaft are rotatably connected with the two sides of the stirring box body through rotating bearings, the sections of the first stirring shaft and the second stirring shaft which are positioned in the stirring box body are square, stirring blade mounting clamping grooves with rectangles are formed in the first stirring shaft and the second stirring shaft which are positioned in the stirring box body at intervals along the circumferential direction, and a stirring blade system is arranged in the stirring blade mounting clamping grooves.
The stirring blade system comprises a mounting seat sleeve and stirring blades which are detachably arranged on the mounting seat sleeve along the circumferential direction of the mounting seat sleeve; the mounting seat sleeve consists of a left mounting seat sleeve and a right mounting seat sleeve which are symmetrically arranged, and the left mounting seat sleeve and the right mounting seat sleeve are connected by bolts and are rectangular mounting seat sleeves matched with the stirring blade mounting clamping grooves after being connected; arc-shaped blade angle adjusting grooves are formed in the surfaces of the left mounting seat sleeve and the right mounting seat sleeve; the stirring blade comprises a blade body and a blade connecting part detachably connected with the blade body, a blade supporting part is integrally arranged at the lower end of the blade connecting part, three connecting bolts are vertically arranged on the lower surface of the blade supporting part and arranged in a circle, the three connecting bolts are all arranged in an arc-shaped blade angle adjusting groove, and the blade supporting part is detachably connected with a corresponding left mounting seat sleeve or a corresponding right mounting seat sleeve through the connecting bolts; the upper end of the blade supporting part is provided with a strip-shaped blade connecting and adjusting groove along the axial direction of the blade supporting part, one side surface of the blade body is provided with a blade supporting part accommodating groove matched with the upper end of the blade supporting part, a blade body connecting bolt is arranged at the bottom of the blade supporting part accommodating groove in a vertical mode, and the blade body is detachably connected with the blade supporting part through the blade body connecting bolt.
Bending parts which form an angle of 60 degrees with the blade body are arranged on two sides of the blade body, and the bending parts and the blade body are integrally formed; the surface of the blade body is provided with a plurality of grooves.
The box heating system comprises an asphalt heating chamber arranged above the stirring box body, wherein the upper part of the asphalt heating chamber is provided with a filling port, a discharge port of the asphalt heating chamber is connected with an injection pump, an outlet of the injection pump is connected with an asphalt conveying pipe, an outlet of the asphalt conveying pipe is connected with an asphalt spraying component arranged in the stirring box body, and the asphalt spraying component is arranged above a first stirring shaft and a second stirring shaft.
The asphalt spraying assembly comprises a first spraying pipe positioned above the first stirring shaft and a second spraying pipe positioned above the second stirring shaft, and a plurality of asphalt spray heads are uniformly arranged on the first spraying pipe and the second spraying pipe; the outer walls of the asphalt heating chamber, the asphalt conveying pipe, the first spraying pipe and the second spraying pipe are all coiled with heating pipes, and the heating pipes are connected with a box body heating system.
The box heating system adopts a heat-conducting oil electric heating system, the outer surface of the stirring box body is coiled with a heating pipe, and the heating pipe is connected with the heat-conducting oil electric heating system.
The surface of the stirring box body is also provided with a heat preservation layer, and a heating pipe coiled on the surface of the stirring box body is positioned between the surface of the stirring box body and the heat preservation layer.
The utility model discloses when using, realize bituminous mixture's transportation by drawing locomotive and frame. During the transportation, mixing and storage processes, the stirring blade system with the special design improves the mixing efficiency from multiple angles. If the blade angle adjusting groove is matched with the connecting bolt which is arranged on the lower surface of the blade supporting part in a concentric circle for use, the angle of the stirring blade can be improved according to the actual stirring requirement, and the stirring effect is improved; the both sides of blade body all are provided with and become 60 kinks with the blade body, and the kink can be gathered together the mixture, makes its realization circulation stirring under multiunit stirring vane's combined action, further improves stirring effect. The surface of the blade body is also provided with a plurality of grooves, so that the friction coefficient is improved, and the stirring effect is enhanced. Meanwhile, the detachable connection mode of the stirring blade system is realized, and the installation and maintenance are convenient.
The utility model discloses still through setting up box heating system and the pitch spraying system that mutually supports the use, can heat the mixture in the pitch that will get into the agitator tank promptly and the agitator tank to in guaranteeing transportation and storage process, pitch, bone meal and material powder can continuously stir under suitable temperature condition. The asphalt heating chamber among the box heating system for to the asphalt that will get into in the agitator chamber heat and keep warm the storage, make asphalt guarantee good stirring state through suitable heating temperature, can spray the bone meal and the material powder in the subassembly and the agitator tank and carry out abundant contact after the subassembly through jet pump, pitch conveyer pipe and pitch, with the stirring effect of increaseing. The phenomenon that the asphalt mixture is not uniformly stirred due to the fact that the asphalt is stacked after the asphalt is stirred in the stirring chamber due to too low temperature and is not uniformly contacted with the bone meal and the material powder is effectively avoided.
The utility model discloses can effectively adapt to bituminous mixture's the storage demand of mixing, guarantee bituminous mixture's the effect of mixing, lay the construction for the ultra-thin top facing on road surface and provide good material basis.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the stirring box of the present invention;
FIG. 3 is a schematic structural view of a stirring blade system according to the present invention;
FIG. 4 is a schematic structural view of the mounting sleeve of the present invention;
FIG. 5 is a schematic structural view of a blade angle adjusting slot of the present invention;
fig. 6 is a schematic structural view of the stirring blade of the present invention.
Detailed Description
The invention is described in detail below with reference to the following figures and examples:
as shown in figures 1 to 6, ultra-thin top facing bituminous mixture dumper, including the frame 22 that pulls locomotive 21 and be connected with the locomotive, tractor 21 head is used for providing traction power to drive frame 22 and remove. The tractor 21 and the carriage 22 may be an existing transport vehicle. The frame 22 is provided with a frame 2, and the frame 2 is used for bearing and fixing the stirring box body 1. The stirring box body 1 is arranged on the frame 2, the upper part and the lower part of the stirring box body 1 are respectively provided with a feeding hole and a discharging hole, an asphalt mixture conveying device 23 is arranged below the discharging hole, and the asphalt mixture conveying device 23 is used for conveying the asphalt mixture output by the stirring box body 1 to the storage bin of the asphalt paver. The stirring box comprises a stirring box body 1, a first stirring shaft 3 and a second stirring shaft 4 are arranged in parallel in the stirring box body 1, a driving device 5 is arranged on one side of a frame 2, the driving device 5 drives the first stirring shaft 3 and the second stirring shaft 4 to synchronously rotate reversely, stirring blade systems 6 are arranged on the first stirring shaft 3 and the second stirring shaft 4 in a staggered mode, a box body heating system 7 is arranged on the outer side of the stirring box body 1, and an asphalt spraying system 8 is further arranged above the inner portion of the stirring box body 1.
The utility model discloses in, 2 rear ends of frame are articulated with frame 22 through back landing leg 24, and the front end of frame 2 is provided with preceding landing leg 25, is provided with hydraulic lifting system 26 between the front end of frame 2 and frame 22's front end, and hydraulic lifting system 26 is used for lifting 2 front ends of frame to certain angle, the output of the bituminous mixture of being convenient for. Hydraulic lift system 26 may employ existing hydraulic rams. The discharge port is arranged at the lower part of the rear end of the stirring box body 1 and is matched with the asphalt mixture conveying device 23 to convey the asphalt mixture. The asphalt mixture conveying device 23 is arranged between the frame 22 and the frame 2 in a sliding manner, and when the asphalt mixture conveying device 23 is stored, the tail part of the asphalt mixture conveying device 23 is positioned between the frame 22 and the frame 2, so that the transportation of the asphalt mixture on a road is facilitated; when the asphalt mixture conveying device 23 is unfolded, the tail part of the asphalt mixture conveying device 23 is positioned outside the frame 22 and the frame 2, so that the asphalt mixture in the stirring box body 1 can be conveyed to the storage bin of the asphalt paving machine conveniently. The asphalt mixture conveying device 23 can adopt an existing asphalt mixture conveying belt system, the conveying belt system comprises a conveying belt and a conveying belt rack, the lower end of the conveying belt rack is connected with the frame 22 in a sliding mode, and when the asphalt mixture in the stirring box body 1 needs to be conveyed into the storage bin of the asphalt spreading machine, the rear end of the conveying belt is pulled out to enable the rear end of the conveying belt to be above the storage bin of the asphalt spreading machine.
The utility model discloses in, two sets of stirring vane 10 systems 6 of staggered arrangement on first (mixing) shaft 3 and the second (mixing) shaft 4, along with first (mixing) shaft 3 and the synchronous antiport of second (mixing) shaft 4, can the material to the agitator tank of synchronous stabilization stir, form the circulation stirring of material in the agitator tank, effectively improve stirring effect. In this embodiment, the two ends of the first stirring shaft 3 and the second stirring shaft 4 are rotatably connected with the two sides of the stirring box body 1 through rotating bearings, the sections of the first stirring shaft 3 and the second stirring shaft 4 in the stirring box body 1 are both square, rectangular stirring blade 10 mounting slots are circumferentially arranged on the first stirring shaft 3 and the second stirring shaft 4 in the stirring box body 1 at intervals, and the stirring blade 10 system 6 is arranged in the stirring blade 10 mounting slots.
The stirring blade 10 system 6 comprises a mounting sleeve 9 and a stirring blade 10 which is detachably arranged on the mounting sleeve 9 along the circumferential direction of the mounting sleeve 9; the mounting seat sleeve 9 consists of a left mounting seat sleeve 91 and a right mounting seat sleeve 92 which are symmetrically arranged, and the left mounting seat sleeve 91 and the right mounting seat sleeve 92 are connected by bolts and are rectangular mounting seat sleeves matched with the mounting clamping grooves of the stirring blades 10 after being connected; arc-shaped blade angle adjusting grooves 93 are formed in the surfaces of the left mounting seat sleeve 91 and the right mounting seat sleeve 92; the stirring blade 10 comprises a blade body 101 and a blade connecting part 102 detachably connected with the blade body 101, a blade supporting part 103 is integrally arranged at the lower end of the blade connecting part 102, three connecting bolts 104 are vertically arranged on the lower surface of the blade supporting part 103, the three connecting bolts 104 are arranged in a circle, the three connecting bolts 104 are all arranged in an arc-shaped blade angle adjusting groove 93, and the blade supporting part 103 is detachably connected with a corresponding left mounting seat sleeve 91 or a corresponding right mounting seat sleeve 92 through the connecting bolts 104; the upper end of the blade supporting part 103 is provided with a strip-shaped blade connecting adjusting groove along the axial direction of the blade supporting part 103, the height of installation with the blade body 101 can be adjusted, one side surface of the blade body 101 is provided with a blade supporting part accommodating groove matched with the upper end of the blade supporting part 103, a blade body connecting bolt is arranged in the blade supporting part accommodating groove and is perpendicular to the bottom of the blade supporting part accommodating groove, and the blade body 101 is detachably connected with the blade supporting part 103 through the blade body connecting bolt in the blade connecting adjusting groove.
In this embodiment, the stirring blade 10 is detachably connected to the mounting sleeve 9, which facilitates installation and maintenance. Through setting up curved blade angle adjustment tank 93, use with the connecting bolt 104 cooperation that sets up the coliform at blade supporting part 103 lower surface, be convenient for improve stirring vane 10 angle according to actual stirring demand to further improve stirring effect. Meanwhile, the blade supporting part 103 and the blade body 101 are detachably connected through the supporting part accommodating groove and the blade body connecting bolt, so that the connection stability can be ensured, and the installation and the replacement of workers are convenient.
Both sides of the blade body 101 are provided with bent parts 105 forming an angle of 60 degrees with the blade body 101, and the bent parts 105 are integrally formed with the blade body 101. The bending part 105 can gather the mixture, so that the mixture can be circularly stirred under the combined action of the multiple groups of stirring blades 10, and the stirring effect is further improved. The surface of the blade body 101 is also provided with a plurality of grooves 106, so that the friction coefficient is improved, and the stirring effect is enhanced.
The utility model discloses in, box heating system 7 is used for heating the mixture in the pitch that will get into the agitator tank promptly and the agitator tank to guarantee that pitch, bone meal and material powder can stir under suitable temperature condition. Asphalt spraying system 8 is including setting up the pitch heating chamber 11 in the case box top, and the upper portion of pitch heating chamber 11 is provided with the sprue, and the discharge gate of pitch heating chamber 11 is connected with jet pump 12, and the exit linkage of jet pump 12 has the pitch conveyer pipe, and the export of pitch conveyer pipe is connected with the pitch spraying subassembly that sets up in agitator tank box 1, and the pitch spraying subassembly sets up in the top of first (mixing) shaft 3 and second (mixing) shaft 4.
In this embodiment, the asphalt spraying assembly comprises a first spraying pipe 13 located above the first stirring shaft 3 and a second spraying pipe located above the second stirring shaft 4, and a plurality of asphalt sprayers are uniformly arranged on the first spraying pipe 13 and the second spraying pipe. The spray pipes and the asphalt spray heads which are arranged in groups can uniformly spray the heated liquid asphalt to the surfaces of the bone meal and the material powder, and the reciprocating full stirring is realized through the two groups of synchronously rotating stirring blade systems 6.
In order to guarantee that pitch is in all the time under suitable stirring temperature at the stirring in-process, the utility model discloses in, the outer wall of pitch heating chamber 11, pitch conveyer pipe, first spray pipe 13 and second spray pipe all coils and is provided with the heating pipe, and the heating pipe is connected with box heating system 7. The box body heating system 7 adopts a heat conduction oil electric heating device, the outer surface of the stirring box body 1 is coiled with a heating pipe, and the heating pipe is connected with the heat conduction oil electric heating device. The heat-conducting oil electric heating device has the advantages of fast temperature rise, high heat conduction efficiency and accurate temperature control.
The utility model discloses in, 1 surface of agitator tank box still is provided with the heat preservation, and the heating pipe that 1 surface of agitator tank box coiled the setting is located between 1 surface of agitator tank box and the heat preservation. The heat preservation can improve heat availability factor with heat locking in agitator tank, reduces calorific loss, guarantees the temperature stability in the agitator tank simultaneously, improves stirring effect.
Claims (10)
1. The utility model provides an ultra-thin top facing bituminous mixture dumper which characterized in that: including drawing the locomotive and with draw the frame that the locomotive is connected, the frame on be provided with the frame, the agitator tank box sets up in the frame, the upper portion and the lower part of agitator tank box are provided with feed inlet and discharge gate respectively, the below of discharge gate is provided with bituminous mixture conveyor, parallel arrangement first (mixing) shaft and second (mixing) shaft in the agitator tank box, frame one side is provided with drive arrangement, the synchronous antiport of first (mixing) shaft of drive arrangement drive and second (mixing) shaft, crisscross stirring vane system that is provided with on first (mixing) shaft and the second (mixing) shaft, the agitator tank box outside is provided with box heating system, the inside top of agitator tank box still is provided with pitch spraying system.
2. The ultra-thin overlay asphalt mixture truck according to claim 1, characterized in that: the rear end of the frame is hinged with the frame through a rear support leg, the front end of the frame is provided with a front support leg, a hydraulic lifting system is arranged between the front end of the frame and the front end of the frame, a discharge port is arranged at the lower part of the rear end of the stirring box body, an asphalt mixture conveying device is arranged between the frame and the frame in a sliding manner, and when the asphalt mixture conveying device is stored, the tail part of the asphalt mixture conveying device is positioned between the frame and the frame; when the asphalt mixture conveying device is unfolded, the tail part of the asphalt mixture conveying device is positioned outside the frame and the rack.
3. The ultra-thin overlay asphalt mixture truck according to claim 2, characterized in that: the asphalt mixture conveying device adopts a conveyor belt system, the conveyor belt system comprises a conveyor belt and a conveyor belt rack, and the lower end of the conveyor belt rack is connected with the frame in a sliding manner.
4. The ultra-thin overlay asphalt mixture truck according to claim 1, characterized in that: the two ends of the first stirring shaft and the second stirring shaft are rotatably connected with the two sides of the stirring box body through rotating bearings, the sections of the first stirring shaft and the second stirring shaft which are positioned in the stirring box body are square, stirring blade mounting clamping grooves with rectangles are formed in the first stirring shaft and the second stirring shaft which are positioned in the stirring box body at intervals along the circumferential direction, and a stirring blade system is arranged in the stirring blade mounting clamping grooves.
5. The ultra-thin overlay asphalt mixture truck according to claim 4, characterized in that: the stirring blade system comprises a mounting seat sleeve and stirring blades which are detachably arranged on the mounting seat sleeve along the circumferential direction of the mounting seat sleeve; the mounting seat sleeve consists of a left mounting seat sleeve and a right mounting seat sleeve which are symmetrically arranged, and the left mounting seat sleeve and the right mounting seat sleeve are connected by bolts and are rectangular mounting seat sleeves matched with the stirring blade mounting clamping grooves after being connected; arc-shaped blade angle adjusting grooves are formed in the surfaces of the left mounting seat sleeve and the right mounting seat sleeve; the stirring blade comprises a blade body and a blade connecting part detachably connected with the blade body, a blade supporting part is integrally arranged at the lower end of the blade connecting part, three connecting bolts are vertically arranged on the lower surface of the blade supporting part and arranged in a circle, the three connecting bolts are all arranged in an arc-shaped blade angle adjusting groove, and the blade supporting part is detachably connected with a corresponding left mounting seat sleeve or a corresponding right mounting seat sleeve through the connecting bolts; the upper end of the blade supporting part is provided with a strip-shaped blade connecting and adjusting groove along the axial direction of the blade supporting part, one side surface of the blade body is provided with a blade supporting part accommodating groove matched with the upper end of the blade supporting part, a blade body connecting bolt is arranged at the bottom of the blade supporting part accommodating groove in a vertical mode, and the blade body is detachably connected with the blade supporting part through the blade body connecting bolt.
6. The ultra-thin overlay asphalt mixture truck according to claim 5, characterized in that: bending parts which form an angle of 60 degrees with the blade body are arranged on two sides of the blade body, and the bending parts and the blade body are integrally formed; the surface of the blade body is provided with a plurality of grooves.
7. The ultra-thin overlay asphalt mixture truck according to claim 1, characterized in that: the box heating system comprises an asphalt heating chamber arranged above the stirring box body, wherein the upper part of the asphalt heating chamber is provided with a filling port, a discharge port of the asphalt heating chamber is connected with an injection pump, an outlet of the injection pump is connected with an asphalt conveying pipe, an outlet of the asphalt conveying pipe is connected with an asphalt spraying component arranged in the stirring box body, and the asphalt spraying component is arranged above a first stirring shaft and a second stirring shaft.
8. The ultra-thin overlay asphalt mixture truck according to claim 7, characterized in that: the asphalt spraying assembly comprises a first spraying pipe positioned above the first stirring shaft and a second spraying pipe positioned above the second stirring shaft, and a plurality of asphalt spray heads are uniformly arranged on the first spraying pipe and the second spraying pipe; the outer walls of the asphalt heating chamber, the asphalt conveying pipe, the first spraying pipe and the second spraying pipe are all coiled with heating pipes, and the heating pipes are connected with a box body heating system.
9. The ultra-thin overlay asphalt mixture truck according to claim 8, characterized in that: the box heating system adopts a heat-conducting oil electric heating system, the outer surface of the stirring box body is coiled with a heating pipe, and the heating pipe is connected with the heat-conducting oil electric heating system.
10. The ultra-thin overlay asphalt mixture truck according to claim 9, characterized in that: the surface of the stirring box body is also provided with a heat preservation layer, and a heating pipe coiled on the surface of the stirring box body is positioned between the surface of the stirring box body and the heat preservation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023097758.1U CN214194019U (en) | 2020-12-21 | 2020-12-21 | Ultra-thin top facing bituminous mixture dumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023097758.1U CN214194019U (en) | 2020-12-21 | 2020-12-21 | Ultra-thin top facing bituminous mixture dumper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214194019U true CN214194019U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023097758.1U Active CN214194019U (en) | 2020-12-21 | 2020-12-21 | Ultra-thin top facing bituminous mixture dumper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214194019U (en) |
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2020
- 2020-12-21 CN CN202023097758.1U patent/CN214194019U/en active Active
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