CN217725706U - Combined type double-roller crusher - Google Patents
Combined type double-roller crusher Download PDFInfo
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- CN217725706U CN217725706U CN202220765189.3U CN202220765189U CN217725706U CN 217725706 U CN217725706 U CN 217725706U CN 202220765189 U CN202220765189 U CN 202220765189U CN 217725706 U CN217725706 U CN 217725706U
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Abstract
The utility model relates to a combined type double-roller crusher has solved the broken uneven problem of material particle size that than little, the broken play of bold footpath material breakage. The crushing device comprises a feeding hopper, an upper shell, a lower shell, a discharge port, a primary crushing device, a secondary crushing device, a crushing toothed plate, an adjusting rod, a toothed plate limiting pull rod, a pull rod connecting point, an adjusting screw, a material guide plate, a secondary crushing impact plate, an impact blade, an impact plate adjusting device and an impact limiting pull rod. The device can realize the even breakage of various materials, and the breakage ratio is high, especially to the breakage of various crop straws, and the particle diameter is even, and the ejection of compact is fast, reasonable in design, compact structure, crushing effect is good, can realize serialization operation, and work efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of the breaker, specifically be a combined type double roll crusher.
Background
In the industrial technical field, materials with large block diameters are often crushed and then enter the next technical process, and sometimes the particle sizes of the crushed materials directly influence the product quality. Meanwhile, for some materials with high toughness or hardness, the materials are difficult to crush, or the crushing ratio is small, so that the crushing requirement cannot be met, and the product quality and the setting of process parameters are seriously influenced. The existing crusher has an important problem that the crushed material particles have the defects of non-uniform size and overlarge particles due to one-time crushing. Therefore, the research on a novel efficient crusher has important significance in improving the crushing ratio.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough and defect, provide a combined type double roll crusher.
The utility model discloses a technical problem is solved to following technical scheme. A combined type double-roll crusher, include feed hopper, go up casing, lower casing, discharge gate, one-level breaker, second grade breaker, broken pinion rack, adjust pole, pinion rack limit pull rod, pull rod tie point, regulation tie point, adjusting screw, stock guide, the broken counterattack board of second grade, counterattack blade, counterattack board adjusting device, counterattack limit pull rod.
The feeding hopper is arranged at the upper part of the upper shell, and the discharge port is arranged at the lower part of the lower shell; the first-stage crushing device, the second-stage crushing impact plate, the crushing toothed plate and the material guide plate are arranged in the upper shell, the upper half part of the second-stage crushing device is arranged in the upper shell, and the lower half part of the second-stage crushing device is arranged in the lower shell;
the crushing toothed plate is a rectangular metal plate and comprises toothed plate bulges and a flat plate, the flat plate is a crushing toothed plate main plate, the toothed plate bulges are metal bulges, the size of the toothed plate bulges is determined according to the physicochemical properties of crushed materials, and the toothed plate bulges are arranged on the flat plate in a staggered manner. The crushing toothed plate is obliquely arranged in the upper shell below the feeding hopper, one end of a toothed plate limiting pull rod is fixed on the side wall of the upper shell, a pull rod connecting point is a connecting point of the other end of the toothed plate limiting pull rod and the crushing toothed plate and is movably connected, and the crushing toothed plate can swing around the pull rod connecting point; the adjusting connecting point is arranged on the crushing toothed plate, and the adjusting rod is connected to the adjusting connecting point; the adjusting rod is provided with threads which are matched with the threads of the adjusting screw, and the position of the crushing toothed plate is adjusted through the rotation of the adjusting rod in the adjusting screw; the guide plate is connected below the crushing toothed plate.
The primary crushing device comprises a primary crushing roller, a primary crushing cutter, a cutter rest, a shaft, a primary large rotating roller, a primary belt, a primary small rotating roller, a primary crushing motor and an end plate;
the primary crushing roller is a long round roller, a knife rest is arranged on the primary crushing roller, and a primary crushing knife is arranged on the knife rest; the knife rest is arranged on the first-stage crushing roller in a staggered manner, and end plates are arranged at two ends of the first-stage crushing roller; one shaft is connected to the one end of one-level crushing roller, and the other end of one shaft links to each other with the one-level big roller that changes, and the one-level is changeed the roller greatly and is microscler circle roller, and the one-level belt is the annular, encircles and changes the roller greatly and the one-level is changeed on the roller for a short time at the one-level, and the one-level is changeed the roller for a short time and is connected with one-level crushing motor.
The rotation of the first-level crushing motor drives the first-level small rotary roller to rotate, so that the first-level large rotary roller is driven to rotate, and the first-level crushing roller is driven to rotate.
The knife rest comprises a knife rest plate, a knife rest hole and a knife bolt, the knife rest is a C-shaped metal plate, the knife rest hole is formed in the knife rest plate, and the metal plate is the knife rest plate; the primary crushing cutter comprises a straight cutter and a curved cutter, the straight cutter comprises a straight cutter plate and a straight cutter hole, the straight cutter plate is a square metal plate, and a round straight cutter hole is formed in the straight cutter plate; the bending knife comprises a bending knife plate and a bending knife hole, the bending knife plate is a metal plate inclined at a certain angle, and the upper part of the bending knife plate is provided with a round bending knife hole;
the two knife rest blocks are a pair, the knife rest plates are welded on the primary crushing roller at intervals respectively, the size of a knife rest hole is the same as that of a straight knife hole and a bent knife hole, the straight knife and the bent knife are arranged between the two knife rest blocks, and a knife bolt penetrates through the knife rest hole, the bent knife hole and the straight knife hole respectively to form a primary crushing knife;
the first-stage crushing knife can be composed of two curved knives and a straight knife, the two curved knives are positioned at two sides of the straight knife, and the bending directions of the curved knife plates are opposite; the first-stage crushing knife can be designed to be composed of two bent knives or one bent knife and one straight knife according to different physicochemical properties of crushed materials.
The secondary crushing device comprises a secondary crushing roller, a secondary crushing cutter, a secondary shaft, a secondary large rotating roller, a secondary small rotating roller, a secondary belt and a secondary crushing motor;
the secondary crushing roller is a long round roller, a knife rest is arranged on the secondary crushing roller, and the secondary crushing knife is arranged on the knife rest; the tool rests are arranged on the secondary crushing roller in a staggered manner; the one end of second grade crushing roller is connected the two-shaft, and the other end of two-shaft links to each other with the big roller that changes of second grade, and the big roller that changes of second grade is microscler roller, and the second grade belt is the annular, encircles on the big roller that changes of second grade and the little roller that changes of second grade, and the little roller that changes of second grade is connected with the broken motor of second grade.
The second-stage crushing impact plate is a C-shaped metal plate, the impact blade is a metal blade and is welded on the second-stage crushing impact plate, the impact limiting pull rod limits the second-stage crushing impact plate, the impact plate adjusting device is connected to the second-stage crushing impact plate, the distance between the second-stage crushing impact plate and the second-stage crushing roller is adjusted, and materials splashed out of materials through the second-stage crushing roller are just hit on the impact blade.
The device is at the during operation, and in the broken material passed through feed hopper entering upper shell in advance, adjust the clearance size between broken pinion rack and the one-level crushing roller through adjusting the pole, make broken material can not direct landing in advance. Starting a primary crushing motor, and carrying out primary crushing on the material under the combined action of a primary crushing knife and a crushing toothed plate. The material after the one-level breakage falls into on the second grade crushing roller through the effect of stock guide, and the direction of rotation of second grade crushing roller is opposite with the one-level crushing roller, and the material continues to carry out the second grade breakage. The position of the second-stage crushing impact plate is adjusted through the impact plate adjusting device, and the impact blades in the three directions continue to crush the materials. The materials sputtered out by the secondary crushing roller have a certain speed, are continuously crushed under the action of the impact blade, and are discharged through the discharge hole after being finally crushed.
The device can realize the even breakage of various materials, and the breakage ratio is high, especially to the breakage of various crop straws, and the particle diameter is even, and the ejection of compact is fast, reasonable in design, compact structure, crushing effect is good, can realize serialization operation, and work efficiency is high.
Drawings
FIG. 1 is a schematic structural view of a composite double-roll crusher;
FIG. 2 is a front view of a primary crushing apparatus;
FIG. 3 is a left side view of the primary crushing apparatus;
FIG. 4 is a front view of a secondary crushing apparatus;
FIG. 5 is a left side view of the secondary crushing apparatus;
FIG. 6 is a front view of a primary crushing roller;
FIG. 7 is a left side view of the primary crushing roller;
FIG. 8 is a front view of the curved blade;
FIG. 9 is a left side view of the curved blade;
FIG. 10 is a front view of the straight blade;
FIG. 11 is a front view of the tool holder;
FIG. 12 is a left side view of the tool holder;
fig. 13 is a schematic view of a crushing tooth plate;
FIG. 14 is a schematic view of the connection of the primary crushing blade.
The figure is as follows: the crushing device comprises a feeding hopper 1, an upper shell 2, a lower shell 3, a discharge port 4, a primary crushing device 5, a secondary crushing device 6, a crushing toothed plate 7, an adjusting rod 8, a toothed plate limit pull rod 9, a pull rod connecting point 10, an adjusting connecting point 11, an adjusting screw 12, a guide plate 13, a secondary crushing impact plate 14, an impact blade 15, an impact plate adjusting device 16 and an impact limit pull rod 17.
A primary crushing roller, a 5.2 primary crushing cutter, a 5.3 cutter rest, a 5.4 shaft, a 5.5 primary large rotating roller, a 5.6 primary belt, a 5.7 primary small rotating roller, a 5.8 primary crushing motor and a 5.9 end plate;
5.2.1 straight knife, 5.2.2 curved knife;
5.2.1.1 straight knife board, 5.2.1.2 straight knife hole;
5.2.2.1 bending knife board and 5.2.2.2 bending knife hole;
5.3.1 tool rest plate, 5.3.2 tool rest hole and 5.3.3 tool bolt;
6.1 a secondary crushing roller, 6.2 a secondary crushing cutter, 6.3 a secondary shaft, 6.4 a secondary large rotating roller, 6.5 a secondary small rotating roller, 6.6 a secondary belt and 6.7 a secondary crushing motor;
7.1 the toothed plate is convex and 7.2 the flat plate.
Detailed Description
As shown in fig. 1-14, the present invention solves the technical problem by the following technical solutions. A combined type double-roll crusher, including feed hopper 1, go up casing 2, lower casing 3, discharge gate 4, one-level breaker 5, second grade breaker 6, broken pinion rack 7, adjust pole 8, the spacing pull rod 9 of pinion rack, pull rod tie point 10, adjust tie point 11, adjusting screw 12, stock guide 13, the broken impact plate 14 of second grade, impact blade 15, impact plate adjusting device 16, impact limiting pull rod 17.
The upper shell 2 is a square metal box, the lower shell 3 is a rectangular metal box body, the walls of the upper shell 2 and the lower shell 3 are connected, the feeding hopper 1 is arranged at the upper part of the upper shell 2, and the discharge port 4 is arranged at the lower part of the lower shell 3; the primary crushing device 4, the secondary crushing impact plate 14, the crushing toothed plate 7 and the material guide plate 13 are square metal plates, and inside the upper shell 2, the upper half part of the secondary crushing device 6 is inside the upper shell 2, and the lower half part of the secondary crushing device is inside the lower shell 3;
as shown in fig. 1 and 13, the crushing toothed plate 7 is a rectangular metal plate and comprises toothed plate protrusions 7.1 and a flat plate 7.2, the flat plate 7.2 is a main plate of the crushing toothed plate 7, the toothed plate protrusions 7.1 are metal protrusions, the size of the metal protrusions is determined according to the physical and chemical properties of crushed materials, and the toothed plate protrusions 7.2 are arranged on the flat plate in a staggered mode. The crushing toothed plate 7 is obliquely arranged in the upper shell 2 below the feeding hopper 1, one end of a toothed plate limiting pull rod 9 is fixed on the side wall of the upper shell 2, a pull rod connection point 10 is a connection point of the other end of the toothed plate limiting pull rod 9 and the crushing toothed plate 7 and is movably connected, and the crushing toothed plate 7 can swing around the pull rod connection point 10; the adjusting connection point 11 is arranged on the crushing toothed plate 7, and the adjusting rod 8 is connected to the adjusting connection point 11; the adjusting rod 8 is provided with threads which are matched with the threads of the adjusting screw 12, and the position of the crushing toothed plate 7 is adjusted through the rotation of the adjusting rod 8 in the adjusting screw; the guide plate 13 is connected below the crushing toothed plate 7.
As shown in attached figures 2 and 3, the primary crushing device 5 comprises a primary crushing roller 5.1, a primary crushing cutter 5.2, a cutter rest 5.3, a shaft 5.4, a primary large rotating roller 5.5, a primary belt 5.6, a primary small rotating roller 5.7, a primary crushing motor 5.8 and an end plate 5.9;
as shown in the attached figure 6, a primary crushing roller 5.1 is a long round roller, a knife rest 5.3 is arranged on the roller, and a primary crushing knife 5.2 is arranged on the knife rest 5.3; the knife rests 5.3 are arranged on the primary crushing roller 5.1 in a staggered manner, the two ends of the primary crushing roller 5.1 are provided with end plates 5.9, and the end plates 5.9 are metal round plates and play a role in supporting and stabilizing; one end of the first-level crushing roller 5.1 is connected with a shaft 5.4, the other end of the shaft 5.4 is connected with a first-level large rotating roller 5.5, the first-level large rotating roller 5.5 is a long round roller, a first-level belt 5.6 is annular and surrounds the first-level large rotating roller 5.5 and the first-level small rotating roller 5.7, and the first-level small rotating roller 5.7 is connected with a first-level crushing motor 5.8.
The rotation of the first-level crushing motor 5.8 drives the first-level small rotating roller 5.7 to rotate, so as to drive the first-level large rotating roller 5.5 to rotate and drive the first-level crushing roller 5.1 to rotate.
As shown in fig. 8-12, the tool rest 5.3 comprises a tool rest plate 5.3.1, a tool rest hole 5.3.2 and a tool bolt 5.3.3, the tool rest 5.3 is a C-shaped metal plate, a circular tool rest hole 5.3.2 is arranged on the C-shaped metal plate, and the tool rest plate 5.3.1 is a metal plate; the primary crushing cutter 5.2 comprises a straight cutter 5.2.1 and a bent cutter 5.2.2, the straight cutter 5.2.1 comprises a straight cutter plate 5.2.1.1 and a straight cutter hole 5.2.1.2, the straight cutter plate 5.2.1.1 is a square metal plate, and a round straight cutter hole 5.2.1.2 is formed in the upper surface of the square metal plate; the curved knife 5.2.2 comprises a curved knife plate 5.2.2.1 and a curved knife hole 5.2.2.2, the curved knife plate 5.2.2.1 is a metal plate inclined at a certain angle, and the upper part of the curved knife plate is provided with a circular curved knife hole 5.2.2.2;
two knife rests 5.3 are a pair, and respectively weld the knife rest plates 5.3.1 on the primary crushing roller 5.1 at intervals, the size of the knife rest hole 5.3.2 is the same as that of the straight knife hole 5.2.1.2 and the bent knife hole 5.2.2, the straight knife 5.2.1 and the bent knife 5.2.2 are arranged between the two knife rests 5.3, and the knife bolt 5.3.3 respectively penetrates through the knife rest hole 5.3.2, the bent knife hole 5.2.2 and the straight knife hole 5.2.1.2 to form a primary crushing knife 5.2;
as shown in fig. 14, the first-stage crushing knife 5.2 may be composed of two curved knives 5.2.2 and a straight knife 5.2.1, the two curved knives 5.2.2 are located at two sides of the straight knife 5.2.1, and the curved knife plates 5.2.2.1 are opposite in bending direction; the primary crushing knife 5.2 can also be designed to be composed of two bent knives 5.2.2 or one bent knife 5.2.2 and one straight knife 5.2.1 according to different physicochemical properties of crushed materials.
As shown in fig. 4 and 5, the secondary crushing device 6 comprises a secondary crushing roller 6.1, a secondary crushing cutter 6.2, a secondary shaft 6.3, a secondary large rotating roller 6.4, a secondary small rotating roller 6.5, a secondary belt 6.6 and a secondary crushing motor 6.7;
the secondary crushing roller 6.1 is a long round roller, a knife rest 5.3 is arranged on the long round roller, the secondary crushing knife 6.2 is arranged on the knife rest 5.3, and the installation mode is the same as that of the primary crushing knife 5.2; the knife rests 5.3 are arranged on the secondary crushing roller 6.1 in a staggered way; two shafts 6.3 are connected to second grade crushing roller 6.1's one end, and two shafts 6.3's the other end links to each other with second grade big roller 6.4 that changes, and second grade big roller 6.4 that changes is microscler roller, and second grade belt 6.6 is the annular, encircles on second grade big roller 6.4 and the little roller 6.5 that changes of second grade, and the little roller 6.5 that changes of second grade is connected with second grade crushing motor 6.7.
The secondary crushing knife 6.2 can be designed into a straight knife 5.2.1 or two bent knives 5.2.2 according to the physical and chemical properties of the materials.
As shown in fig. 1, the second-stage crushing impact plate 14 is a C-shaped metal plate, the impact blade 15 is a metal blade, and is welded on the second-stage crushing impact plate 14, the impact limiting pull rod 17 limits the second-stage crushing impact plate 14, the impact plate adjusting device 16 is connected on the second-stage crushing impact plate 14, and the distance between the second-stage crushing impact plate 14 and the second-stage crushing roller 6.1 is adjusted, so that the material sputtered by the second-stage crushing roller 6.1 just hits the impact blade 15.
When the device works, pre-crushing materials enter the upper shell 2 through the feeding hopper 1, and the size of a gap between the crushing toothed plate 7 and the primary crushing roller 5.1 is adjusted through the adjusting rod 8, so that the pre-crushing materials cannot directly slide down. Starting a first-level crushing motor 5.8, and carrying out first-level crushing on the material under the combined action of a first-level crushing knife 5.2 and a crushing toothed plate 7. The material after the one-level breakage falls onto the second grade crushing roller 6.1 through the effect of stock guide 13, and the direction of rotation of second grade crushing roller 6.1 is opposite with first grade crushing roller 5.1, and the material continues to carry out the second grade breakage. The position of the secondary crushing impact plate 14 is adjusted through the impact plate adjusting device 16, and the impact blades 15 in three directions continue to crush the materials. The materials sputtered by the secondary crushing roller 6.1 have a certain speed, are continuously crushed under the action of the impact blade 15, and are discharged through the discharge hole 4.
The device can realize the even breakage of various materials, and the breakage ratio is high, especially to the breakage of various crop straws, and the particle diameter is even, and the ejection of compact is fast, reasonable in design, compact structure, crushing effect is good, can realize serialization operation, and work efficiency is high.
Claims (9)
1. The utility model provides a combined type double roll crusher which characterized in that: the crushing device comprises a feeding hopper, an upper shell, a lower shell, a discharge port, a primary crushing device, a secondary crushing device, a crushing toothed plate, an adjusting rod, a toothed plate limit pull rod, a pull rod connecting point, an adjusting screw, a material guide plate, a secondary crushing impact plate, an impact blade, an impact plate adjusting device and an impact limit pull rod;
the feeding hopper is arranged at the upper part of the upper shell, and the discharge port is arranged at the lower part of the lower shell; the first-stage crushing device, the second-stage crushing impact plate, the crushing toothed plate and the material guide plate are arranged in the upper shell, the upper half part of the second-stage crushing device is arranged in the upper shell, and the lower half part of the second-stage crushing device is arranged in the lower shell;
the crushing toothed plate is a rectangular metal plate and comprises toothed plate bulges and a flat plate, the flat plate is a crushing toothed plate main plate, the toothed plate bulges are metal bulges, and the toothed plate bulges are arranged on the flat plate in a staggered manner;
the primary crushing device comprises a primary crushing roller, a primary crushing cutter, a cutter rest, a shaft, a primary large rotating roller, a primary belt, a primary small rotating roller, a primary crushing motor and an end plate; the primary crushing roller is a long round roller, a knife rest is arranged on the primary crushing roller, and the primary crushing knife is arranged on the knife rest; the knife rest is arranged on the first-stage crushing roller in a staggered manner, and end plates are arranged at two ends of the first-stage crushing roller; one end of the first-stage crushing roller is connected with a shaft, the other end of the shaft is connected with a first-stage large rotating roller, the first-stage large rotating roller is a long round roller, a first-stage belt is annular and surrounds the first-stage large rotating roller and the first-stage small rotating roller, and the first-stage small rotating roller is connected with a first-stage crushing motor;
the primary crushing cutter comprises a straight cutter and a curved cutter, the straight cutter comprises a straight cutter plate and a straight cutter hole, the straight cutter plate is a square metal plate, and a round straight cutter hole is formed in the straight cutter plate; the curved knife comprises a curved knife plate and a curved knife hole, the curved knife plate is a metal plate which is inclined at a certain angle, and the upper part of the curved knife plate is provided with a circular curved knife hole;
the secondary crushing device comprises a secondary crushing roller, a secondary crushing cutter, a secondary shaft, a secondary large rotating roller, a secondary small rotating roller, a secondary belt and a secondary crushing motor;
the secondary crushing roller is a long round roller, a tool rest is arranged on the secondary crushing roller, and a secondary crushing knife is arranged on the tool rest; the tool rests are arranged on the secondary crushing roller in a staggered manner; one end of the second-stage crushing roller is connected with the second shaft, the other end of the second shaft is connected with the second-stage large rotating roller, the second-stage large rotating roller is a long round roller, the second-stage belt is annular and surrounds the second-stage large rotating roller and the second-stage small rotating roller, and the second-stage small rotating roller is connected with a second-stage crushing motor;
the second-stage crushing impact plate is a C-shaped metal plate, the impact blade is a metal blade and is welded on the second-stage crushing impact plate, the impact limiting pull rod limits the second-stage crushing impact plate, and the impact plate adjusting device is connected on the second-stage crushing impact plate.
2. A composite twin roll crusher as defined in claim 1, wherein: broken pinion rack slope is installed inside the last casing of feed hopper below, and pinion rack limit pull rod one end is fixed on last casing lateral wall, and the pull rod tie point is the tie point of the pinion rack limit pull rod other end and broken pinion rack, for swing joint.
3. A composite twin roll crusher as defined in claim 1, wherein: the adjusting connecting point is arranged on the crushing toothed plate, and the adjusting rod is connected to the adjusting connecting point.
4. A compound double roll crusher as claimed in claim 1, wherein: the adjusting rod is provided with threads which are matched with the threads of the adjusting screw; the guide plate is connected below the crushing toothed plate.
5. A compound double roll crusher as claimed in claim 1, wherein: the knife rest comprises a knife rest plate, a knife rest hole and a knife bolt, the knife rest is a C-shaped metal plate, the knife rest hole is formed in the knife rest plate, and the metal plate is the knife rest plate.
6. A composite twin roll crusher as defined in claim 1, wherein: the first-stage crushing knife can be composed of two bent knives and a straight knife, the two bent knives are positioned on two sides of the straight knife, and the bending directions of the bent knife plates are opposite.
7. A composite twin roll crusher as defined in claim 1, wherein: the two knife rest blocks are a pair, the knife rest plates are welded on the primary crushing roller at intervals respectively, the size of the knife rest hole is the same as that of the straight knife hole and the bent knife hole, the straight knife and the bent knife are arranged between the two knife rest blocks, and the knife bolt penetrates through the knife rest hole, the bent knife hole and the straight knife hole respectively to form the primary crushing knife.
8. A composite twin roll crusher as defined in claim 1, wherein: the first-stage crushing knife consists of two bent knives.
9. A composite twin roll crusher as defined in claim 1, wherein: the first-stage crushing knife consists of a bent knife and a straight knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220765189.3U CN217725706U (en) | 2022-04-04 | 2022-04-04 | Combined type double-roller crusher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220765189.3U CN217725706U (en) | 2022-04-04 | 2022-04-04 | Combined type double-roller crusher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217725706U true CN217725706U (en) | 2022-11-04 |
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ID=83814955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220765189.3U Active CN217725706U (en) | 2022-04-04 | 2022-04-04 | Combined type double-roller crusher |
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| Country | Link |
|---|---|
| CN (1) | CN217725706U (en) |
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2022
- 2022-04-04 CN CN202220765189.3U patent/CN217725706U/en active Active
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