CN217803455U - Railway is waterproof board raw materials processing lines for tunnel - Google Patents
Railway is waterproof board raw materials processing lines for tunnel Download PDFInfo
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- CN217803455U CN217803455U CN202221541634.4U CN202221541634U CN217803455U CN 217803455 U CN217803455 U CN 217803455U CN 202221541634 U CN202221541634 U CN 202221541634U CN 217803455 U CN217803455 U CN 217803455U
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Abstract
A raw material processing production line of a waterproof board for a railway tunnel comprises a bag breaking device, a mixing device and an extrusion molding device, wherein the bag breaking device comprises a track manipulator (1), a raw material bag conveyor (2) and a group of bag breaking and blanking assemblies, a raw material bag collecting tank is arranged at a discharge port of the raw material bag conveyor (2), the raw material bag conveyor (2) is positioned between the track manipulator (1) and the bag breaking and blanking assemblies, each bag breaking and blanking assembly comprises a box body (3), a pair of raw material bag supporting plates (4), a bag breaking and cutting wheel (5), a motor (6) and a filter screen (7), and the top of the box body (3) is open; the advantages are that: the bag breaking speed is high, the weighing and blanking speed is high, the raw material adding amount is accurate, the extrusion molding speed is high, and the labor intensity of workers is reduced.
Description
Technical Field
The utility model relates to a waterproof board manufacture equipment field, concretely relates to waterproof board raw materials processing lines for railway tunnel.
Background
At present, the waterproof board for the railway tunnel is produced from a plurality of types of raw materials, wherein the raw materials are mostly bagged, the conventional raw material bag is slow in bag breaking speed, the labor intensity of workers is high, and the production efficiency of a factory is influenced; the waterproof board raw materials for the railway tunnel are of various types, and can be mixed after being weighed in batches, and the existing mixing device has the defects that the weighing process is complex, and the addition amount of the raw materials is not well mastered.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned not enough, and provide a waterproof board raw materials processing lines for railway tunnel.
The utility model comprises a bag breaking device, a mixing device and an extrusion molding device,
the bag breaking device comprises a track manipulator, a raw material bag conveyor and a group of bag breaking and discharging assemblies,
a raw material bag collecting tank is arranged at the discharge port of the raw material bag conveyor, the raw material bag conveyor is positioned between the track manipulator and the bag breaking and discharging component,
the bag breaking and blanking assembly comprises a box body, a pair of raw material bag supporting plates, a bag breaking and cutting wheel, a motor and a filter screen,
the top of the box body is open, the bottom of the box body is provided with a feeding funnel, a supporting plate is arranged in the open of the box body, a motor fixing plate is arranged on one raw material bag supporting plate, a pair of raw material bag supporting plates are arranged on the supporting plate of the box body, a cutting area is formed between the pair of raw material bag supporting plates, a bag breaking cutting wheel is arranged on a power output shaft of the motor, the motor is arranged on the bottom surface of the motor fixing plate through a motor bracket, the bag breaking cutting wheel is positioned in the cutting area, a filter screen is arranged at the lower part of the box body,
the bag breaking and blanking assemblies are arranged in sequence;
the mixing device comprises a feeding support frame, a group of vacuum feeding machines, a group of bin type weighing scales and a discharging funnel,
a group of cyclone separators of the vacuum feeding machine are arranged on the top of a feeding support frame through a bracket, a group of bin type weighing scales are arranged on the feeding support frame, the discharge port of the cyclone separator of the vacuum feeding machine is communicated with the feed port of the bin type weighing scales, the bottom of the bin type weighing scales is provided with a discharge component,
the discharging component comprises a discharging cylinder and a material blocking cover body,
the discharge port of the bin type measuring scale is an inclined port, a pair of baffle plate brackets is symmetrically distributed on the outer wall of the discharge port of the bin type measuring scale, one end of a material blocking cover body is movably arranged on the pair of baffle plate brackets through a pin shaft, an air cylinder connecting seat is arranged on the material blocking cover body, the end part of a cylinder barrel of a discharge air cylinder is movably arranged on the outer wall of the bin type measuring scale, the end part of a piston rod of the discharge air cylinder is movably connected with the air cylinder connecting seat, the material blocking cover body is driven by the discharge air cylinder to rotate around the pin shaft so as to open or close the discharge port of the bin type measuring scale,
the discharge hopper is positioned below the discharge port of the bin-type metering scale and is arranged at the bottom of the feeding support frame through a hopper support;
the extrusion molding device comprises a mixing and stirring tank, a spiral extruder, an extruder die head, a calender and an air exhaust assembly,
the mixing and stirring tank comprises a tank body, a stirring shaft and a tank body vacuum feeding machine,
the bottom of the tank body is provided with a discharge hole, the discharge hole of the tank body is provided with a valve, the top of the tank body is provided with a feed inlet, a discharge hole of the tank body vacuum feeding machine is communicated with the feed inlet of the tank body, the stirring shaft is provided with a helical blade, the stirring shaft is movably arranged in the tank body through a bearing and is driven to rotate by a motor,
the discharge port of the tank body is communicated with the feed inlet of the screw extruder, the extruder die head is arranged at the discharge end of the screw extruder, the calender is positioned at one side of the discharge port of the extruder die head,
the air extraction component comprises an air extraction main pipe and a group of dust hoods,
a group of air suction ports are formed on the air suction main pipe, air inlets of a group of dust hoods are respectively communicated with the corresponding air suction ports, and the dust hoods are positioned above the calender;
the feed inlet of a set of vacuum material loading machine is communicated with the corresponding bottom of the box body blanking funnel, and the feed inlet of the tank body vacuum material loading machine is communicated with the discharge hole of the discharge funnel.
The track manipulator comprises a manipulator, a small rail car and a pair of slide rails, the small rail car is located on the pair of slide rails, the manipulator is installed on the small rail car, and a sponge sucker is arranged at the working end of the manipulator.
A pair of feeding inclined plates are arranged on a rack of the raw material bag conveyor in a mirror image distribution manner; the top of the box body is provided with a material baffle plate; the material bag conveyor is a belt conveyor.
A U-shaped cutting wheel baffle is arranged between the pair of raw material bag supporting plates; the discharge funnel discharge gate department is provided with the switching pipeline, and the feed inlet of switching pipeline is the rectangle, and the discharge gate of switching pipeline is circular.
It also has a shielding screen which is covered on the discharging funnel.
The outer wall of the bin type metering scale is provided with a double-lug seat, the end part of a cylinder barrel of the discharging air cylinder is provided with a single-lug seat, and the single-lug seat and a pin shaft are movably arranged on the double-lug seat.
A pair of baffles is arranged in the tank body.
The discharge port of the extruder die head faces the rolling gap between the pair of rollers of the calender.
The tank body consists of a body and a cover body, and the cover body is connected with the body through a flange; the calender is a three-roll calender.
The mixing and stirring tank, the screw extruder, the extruder die head and the calender are all arranged on the horizontal ground through the frame.
The utility model has the advantages that: the bag breaking speed is high, the weighing and blanking speed is high, the raw material adding amount is accurate, the extrusion molding speed is high, and the labor intensity of workers is reduced.
Description of the drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic diagram of the bag-breaking blanking assembly of the utility model.
Fig. 3 is the schematic view of the sectional structure of the bag-breaking blanking assembly of the present invention.
Fig. 4 is a schematic view of the mixing device of the present invention.
Fig. 5 is a schematic structural diagram of the mixing device of the present invention.
Fig. 6 is a schematic structural view of the bin type weighing scale of the present invention.
Fig. 7 is a schematic view of the structure of the extrusion molding apparatus of the present invention.
Fig. 8 is a schematic sectional structural view of the mixing and stirring tank of the present invention.
Fig. 9 is a schematic structural view of the extrusion molding apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention usually place when using, the present invention is only used for convenience of description and simplification of the description, but does not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and thus, the present invention should not be construed as being limited. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance. In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in the attached drawings, the utility model comprises a bag breaking device, a mixing device and an extrusion molding device,
the bag breaking device comprises a track manipulator 1, a raw material bag conveyor 2 and a group of bag breaking and discharging assemblies,
a raw material bag collecting tank is arranged at the discharge port of the raw material bag conveyor 2, the raw material bag conveyor 2 is positioned between the track manipulator 1 and the bag breaking and discharging component,
the bag breaking and blanking assembly comprises a box body 3, a pair of raw material bag supporting plates 4, a bag breaking and cutting wheel 5, a motor 6 and a filter screen 7,
the top of the box body 3 is open, the bottom of the box body 3 is provided with a blanking funnel, a support plate is arranged in the open of the box body 3, a motor fixing plate is arranged on one raw material bag support plate 4, a pair of raw material bag support plates 4 are arranged on the support plate of the box body 3, a cutting area is formed between the pair of raw material bag support plates 4, a bag breaking cutting wheel 5 is arranged on a power output shaft of a motor 6, the motor 6 is arranged on the bottom surface of the motor fixing plate through a motor support, the bag breaking cutting wheel 5 is positioned in the cutting area, a filter screen 7 is arranged at the lower part of the box body 3,
the bag breaking and blanking assemblies are arranged in sequence;
the mixing device comprises a feeding support frame 10, a group of vacuum feeding machines 11, a group of bin type weighing scales 12 and a discharging funnel 13,
a group of cyclone separators of a vacuum feeding machine 11 is arranged on the top of a feeding support frame 10 through a bracket, a group of bin type weighing scales 12 is arranged on the feeding support frame 10, a discharge port of the cyclone separators of the vacuum feeding machine 11 is communicated with a feed port of the bin type weighing scales 12, a discharge assembly is arranged at the bottom of the bin type weighing scales 12,
the discharging assembly comprises a discharging cylinder 14 and a material blocking cover body 15,
the discharge port of the bin type measuring scale 12 is an inclined port, a pair of baffle plate brackets is symmetrically distributed on the outer wall of the discharge port of the bin type measuring scale 12, one end of a material blocking cover body 15 is movably arranged on the pair of baffle plate brackets through a pin shaft, an air cylinder connecting seat is arranged on the material blocking cover body 15, the cylinder end part of a discharging air cylinder 14 is movably arranged on the outer wall of the bin type measuring scale 12, the piston rod end part of the discharging air cylinder 14 is movably connected with the air cylinder connecting seat, the material blocking cover body 15 is driven to rotate around the pin shaft through the discharging air cylinder 14 so as to open or close the discharge port of the bin type measuring scale 12,
the discharge hopper 13 is positioned below the discharge port of the bin type weighing scale 12, and the discharge hopper 13 is arranged at the bottom of the feeding support frame 10 through a hopper support;
the extrusion molding device comprises a mixing and stirring tank 20, a spiral extruder 21, an extruder die head 22, a calender 23 and an air exhaust assembly,
the mixing and stirring tank 20 comprises a tank body 24, a stirring shaft 25 and a tank body vacuum feeding machine 26,
the bottom of the tank body 24 is provided with a discharge port, the discharge port of the tank body 24 is provided with a valve, the top of the tank body 24 is provided with a feed inlet, the discharge port of the tank body vacuum feeding machine 26 is communicated with the feed inlet of the tank body 24, the stirring shaft 25 is provided with a helical blade, the stirring shaft 25 is movably arranged in the tank body 24 through a bearing and is driven to rotate by a motor,
the discharge outlet of the tank body 24 is communicated with the feed inlet of the screw extruder 21, the extruder die head 22 is arranged at the discharge end of the screw extruder 21, the calender 23 is positioned at one side of the discharge outlet of the extruder die head 22,
the suction assembly comprises a suction manifold 27 and a set of dust hoods 28,
a group of air extraction openings are formed in the air extraction main pipe 27, air inlets of a group of dust hoods 28 are respectively communicated with the corresponding air extraction openings, and the dust hoods 28 are positioned above the calender 23;
the feed inlets of the group of vacuum feeding machines 11 are communicated with the corresponding discharging hoppers at the bottom of the box body 3, and the feed inlets of the tank body vacuum feeding machines 26 are communicated with the discharge outlets of the discharging hoppers 13.
The track manipulator 1 comprises a manipulator, a small rail car and a pair of slide rails, wherein the small rail car is arranged on the pair of slide rails, the manipulator is arranged on the small rail car, and a sponge sucker is arranged at the working end of the manipulator.
A pair of feeding inclined plates are arranged on the rack of the raw material bag conveyor 2 in a mirror image distribution manner; the top of the box body 3 is provided with a material baffle plate 8; the material bag conveyor 2 is a belt conveyor.
A U-shaped cutting wheel baffle is arranged between the pair of raw material bag supporting plates 4; an adapter pipe 16 is arranged at the discharge port of the discharge funnel 13, the feed port of the adapter pipe 16 is rectangular, and the discharge port of the adapter pipe 16 is circular.
It also has a shielding screen 17, and the shielding screen 17 covers the discharging funnel 13.
The outer wall of the bin type metering scale 12 is provided with a double-lug seat, the end part of the cylinder barrel of the discharging cylinder 14 is provided with a single-lug seat, and the single-lug seat and the pin shaft are movably arranged on the double-lug seat.
A pair of baffles is disposed within the tank 24.
The discharge of the extruder die 22 is directed towards the roll nip between a pair of rolls of the calender 23.
The tank body 24 consists of a body and a cover body, and the cover body is connected with the body through a flange; the calender 23 is a three-roll calender.
The mixing and stirring tank 20, the screw extruder 21, the extruder die head 22 and the calender 23 are all installed on a horizontal ground through a rack.
The working mode and principle are as follows: the subaerial a plurality of raw materials of having divided of 1 one side of track manipulator places the region, track manipulator 1 is grabbed waterproof board raw materials bag on the specified region and is put into corresponding box 3 in, waterproof board raw materials bag is located a pair of waterproof board raw materials bag layer board 4, starter motor 6, drive broken bag cutting wheel 5 and cut waterproof board raw materials bag open, spill raw materials in it, export to next station by the unloading funnel after filtering through filter screen 7, broken bag after the cutting is driven to raw materials bag conveyer 2 top by track manipulator 1, sponge sucking disc removes the absorption, broken bag falls into raw materials bag conveyer 2 and exports to the raw materials bag collecting vat in. Each raw material is grabbed into a designated box 3 through the rail robot 1.
Through a set of vacuum material loading machine 11 take different waterproof board granule raw materials out to storehouse formula weigher 12 in from the feed opening department of storage box bottom, the back of weighing, discharge air cylinder 14's piston rod is withdrawed, it is rotatory around the round pin axle to drive keeps off the material lid 15, open storehouse formula weigher 12's bottom discharge mouth, discharge waterproof board granule raw materials to discharge hopper 13 in, granule raw materials in a plurality of storehouse formula weighers 12 all fall into discharge hopper 13 in, the unloading can be delivered to next station through conveyor after finishing. Discharging funnel 13 discharge gate department is provided with adapter pipe 16, and adapter pipe 16 converts discharging funnel 13's rectangle discharge gate into circular discharge gate, conveniently links discharging pipeline. Discharge hopper 13 is located and shelters from screen 17, prevents that the raw materials from splashing, plays the effect that prevents debris entering discharge hopper 13 simultaneously.
In having taken out the waterproof board raw materials to jar body 24 through jar body vacuum material loading machine 26, under the drive of motor, (mixing) shaft 25 is rotatory, mix the stirring evenly with graininess waterproof board raw materials through helical blade, then open the valve, the waterproof board raw materials falls into screw extruder 21 in, the waterproof board raw materials is heated through screw extruder 21 and is melted the back and export by extruder die head 22 and get into calender 23 in, the press forming, the waterproof board after the press forming gets into next station under the drive of conveying roller. When the extruder outputs the waterproof board, the generated gas is collected by a group of dust hoods 28 and then is pumped out by the air pumping manifold 27. Because the particle raw materials are stirred by the helical blades at a higher speed and are uniformly stirred.
Claims (10)
1. A production line for processing raw materials of waterproof boards for railway tunnels is characterized by comprising a bag breaking device, a mixing device and an extrusion molding device,
the bag breaking device comprises a track manipulator (1), a raw material bag conveyor (2) and a group of bag breaking and discharging assemblies,
a raw material bag collecting tank is arranged at the discharge port of the raw material bag conveyor (2), the raw material bag conveyor (2) is positioned between the track manipulator (1) and the bag breaking and discharging component,
the bag breaking and blanking assembly comprises a box body (3), a pair of raw material bag supporting plates (4), a bag breaking and cutting wheel (5), a motor (6) and a filter screen (7),
the top of the box body (3) is open, a blanking funnel is arranged at the bottom of the box body (3), supporting plates are arranged in the open of the box body (3), a motor fixing plate is arranged on one raw material bag supporting plate (4), a pair of raw material bag supporting plates (4) are arranged on the supporting plates of the box body (3), a cutting area is formed between the pair of raw material bag supporting plates (4), a bag breaking and cutting wheel (5) is arranged on a power output shaft of a motor (6), the motor (6) is arranged at the bottom surface of the motor fixing plate through a motor support, the bag breaking and cutting wheel (5) is positioned in the cutting area, a filter screen (7) is arranged at the lower part of the box body (3),
the bag breaking and blanking assemblies are arranged in sequence;
the mixing device comprises a feeding support frame (10), a group of vacuum feeding machines (11), a group of bin type weighing scales (12) and a discharging funnel (13),
a group of cyclone separators of a vacuum feeding machine (11) is arranged at the top of a feeding support frame (10) through a bracket, a group of bin type weighing scales (12) is arranged on the feeding support frame (10), a discharge port of the cyclone separators of the vacuum feeding machine (11) is communicated with a feed port of the bin type weighing scales (12), a discharge assembly is arranged at the bottom of the bin type weighing scales (12),
the discharging component comprises a discharging cylinder (14) and a material blocking cover body (15),
the discharge port of the bin type weighing scale (12) is an oblique port, a pair of baffle supports are symmetrically distributed on the outer wall of the discharge port of the bin type weighing scale (12), one end of a material blocking cover body (15) is movably arranged on the pair of baffle supports through a pin shaft, an air cylinder connecting seat is arranged on the material blocking cover body (15), the end part of a cylinder barrel of a material discharging air cylinder (14) is movably arranged on the outer wall of the bin type weighing scale (12), the end part of a piston rod of the material discharging air cylinder (14) is movably connected with the air cylinder connecting seat, the material blocking cover body (15) is driven to rotate around the pin shaft through the material discharging air cylinder (14) so as to open or close the discharge port of the bin type weighing scale (12),
the discharge hopper (13) is positioned below the discharge port of the bin type weighing scale (12), and the discharge hopper (13) is arranged at the bottom of the feeding support frame (10) through a hopper support;
the extrusion molding device comprises a mixing and stirring tank (20), a spiral extruder (21), an extruder die head (22), a calender (23) and an air exhaust assembly,
the mixing and stirring tank (20) comprises a tank body (24), a stirring shaft (25) and a tank body vacuum feeding machine (26),
a discharge port is arranged at the bottom of the tank body (24), a valve is arranged at the discharge port of the tank body (24), a feed port is arranged at the top of the tank body (24), a discharge port of a tank body vacuum feeding machine (26) is communicated with the feed port of the tank body (24), a helical blade is arranged on the stirring shaft (25), the stirring shaft (25) is movably arranged in the tank body (24) through a bearing and is driven to rotate by a motor,
the discharge outlet of the tank body (24) is communicated with the feed inlet of the screw extruder (21), the extruder die head (22) is arranged at the discharge end of the screw extruder (21), the calender (23) is positioned at one side of the discharge outlet of the extruder die head (22),
the air exhaust assembly comprises an air exhaust manifold (27) and a group of dust hoods (28),
a group of air extraction openings are formed in the air extraction main pipe (27), air inlets of a group of dust hoods (28) are respectively communicated with the corresponding air extraction openings, and the dust hoods (28) are positioned above the calender (23);
the feed inlet of a group of vacuum feeding machines (11) is communicated with the corresponding discharge hopper at the bottom of the box body (3), and the feed inlet of the tank body vacuum feeding machine (26) is communicated with the discharge outlet of the discharge hopper (13).
2. The production line of the raw material for the waterproof board for the railway tunnel according to claim 1, wherein the rail manipulator (1) comprises a manipulator, a rail trolley and a pair of slide rails, the rail trolley is positioned on the pair of slide rails, the manipulator is installed on the rail trolley, and a sponge suction cup is arranged at the working end of the manipulator.
3. The production line for processing the waterproof board raw material for the railway tunnel according to claim 1, characterized in that a pair of inclined feeding boards are arranged on a mirror image part of a rack of the raw material bag conveyor (2); the top of the box body (3) is provided with a material baffle plate (8); the raw material bag conveyor (2) is a belt conveyor.
4. The production line of the waterproof board raw material for the railway tunnel according to claim 1, characterized in that a U-shaped cutting wheel baffle is arranged between a pair of raw material bag supporting plates (4); a switching pipeline (16) is arranged at the discharge port of the discharge hopper (13), the feed inlet of the switching pipeline (16) is rectangular, and the discharge port of the switching pipeline (16) is circular.
5. The production line of the raw material for the waterproof board for the railway tunnel according to claim 1, characterized in that the production line further comprises a shielding screen (17), and the shielding screen (17) covers the discharging hopper (13).
6. The production line for processing the raw material of the waterproof plate for the railway tunnel according to claim 1, characterized in that the outer wall of the bin type weighing scale (12) is provided with a double-lug seat, the end part of the cylinder barrel of the discharging cylinder (14) is provided with a single-lug seat, and the single-lug seat is movably arranged on the double-lug seat through the single-lug seat and a pin shaft.
7. The production line of a waterproof board material for a railway tunnel according to claim 1, characterized in that a pair of baffles are provided in the tank body (24).
8. The production line of waterproof board raw material for railway tunnel according to claim 1, characterized in that the discharge port of the extruder die head (22) faces the rolling gap between the pair of rollers of the calender (23).
9. The production line for processing the raw material of the waterproof board for the railway tunnel according to claim 1, wherein the tank body (24) consists of a body and a cover body, and the cover body is connected with the body through a flange; the calender (23) is a three-roll calender.
10. The production line of the raw material for the waterproof board for the railway tunnel according to claim 1, wherein the mixing and stirring tank (20), the screw extruder (21), the extruder die head (22) and the calender (23) are all installed on a horizontal ground through a rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221541634.4U CN217803455U (en) | 2022-06-20 | 2022-06-20 | Railway is waterproof board raw materials processing lines for tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221541634.4U CN217803455U (en) | 2022-06-20 | 2022-06-20 | Railway is waterproof board raw materials processing lines for tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217803455U true CN217803455U (en) | 2022-11-15 |
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ID=83993674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221541634.4U Active CN217803455U (en) | 2022-06-20 | 2022-06-20 | Railway is waterproof board raw materials processing lines for tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217803455U (en) |
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2022
- 2022-06-20 CN CN202221541634.4U patent/CN217803455U/en active Active
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