CN210854149U - Conveying arm and cantilever type tunnel boring machine - Google Patents
Conveying arm and cantilever type tunnel boring machine Download PDFInfo
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- CN210854149U CN210854149U CN201921465373.0U CN201921465373U CN210854149U CN 210854149 U CN210854149 U CN 210854149U CN 201921465373 U CN201921465373 U CN 201921465373U CN 210854149 U CN210854149 U CN 210854149U
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Abstract
The utility model provides a carry arm and cantilever type tunnel boring machine relates to the engineering machine tool field. The utility model provides a conveying arm includes frame and conveying mechanism, and conveying mechanism includes drive assembly, conveying roller subassembly, buffer roller subassembly and conveyer belt, and the conveyer belt transmission is connected in conveying roller subassembly and buffer roller subassembly, and buffer roller subassembly includes a plurality of buffer rollers of arranging in the direction of material feeding, and conveying roller subassembly includes a plurality of conveying rollers of arranging in the direction of material feeding, and a plurality of conveying rollers are arranged between discharge end and buffer roller subassembly; in the feeding direction, the arrangement density of the buffer rollers is greater than that of the conveying rollers. The buffer roller assembly has the advantages that the buffer roller spacing distance is small, the arrangement is dense, and the conveying belt can be well supported. When the material falls on the conveyer belt at the material receiving end, the conveyer belt is not easy to seriously deform under the support of the buffer roller, so that the conveyer belt is not easy to damage due to excessive deformation.
Description
Technical Field
The utility model relates to an engineering machine tool field particularly, relates to a transport arm and cantilever type tunnel boring machine.
Background
In tunnel construction, a heading machine is often required to convey material to a truck and then out of the tunnel via a conveyor arm. However, the materials are often solid and heavy, and when the materials fall on the conveying belt of the conveying arm, the materials can cause large impact on the conveying belt, so that the conveying belt is seriously deformed and damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a carry arm and cantilever type tunnel boring machine, it can improve because of the material strikes the problem that leads to the conveyer belt to damage easily to the conveyer belt.
The embodiment of the utility model discloses a can realize like this:
in a first aspect, an embodiment of the utility model provides a conveying arm is applied to cantilever type tunnel boring machine, include:
the device comprises a rack, a first clamping device and a second clamping device, wherein the rack is provided with a receiving end and a discharging end which are opposite in the feeding direction;
the conveying mechanism is arranged on the rack and used for conveying materials from the receiving end to the discharging end, the conveying mechanism comprises a driving assembly, a conveying roller assembly, a buffer roller assembly and a conveying belt, the conveying belt is connected to the conveying roller assembly and the buffer roller assembly in a transmission mode, the driving assembly is used for driving the conveying belt to move, the buffer roller assembly is arranged at the receiving end of the rack and comprises a plurality of buffer rollers arranged in the feeding direction, the conveying roller assembly comprises a plurality of conveying rollers arranged in the feeding direction, and the plurality of conveying rollers are arranged between the discharging end and the buffer roller assembly; in the feeding direction, the arrangement density of the buffer rollers is greater than that of the conveying rollers.
In an alternative embodiment, the receiving end of the frame is provided with a receiving hopper which is located above the buffer roller assembly, and the receiving hopper has an opening at its lower end for conveying material to the conveyor belt on the buffer roller assembly.
In an optional embodiment, each buffer roller comprises a middle buffer roller and two edge buffer rollers connected to two ends of the middle buffer roller, and the two edge buffer rollers and the middle buffer roller form an included angle and are inclined upwards.
In an alternative embodiment, each conveyor roller comprises a central idler and two side idlers connected to the two ends of the central idler, the two side idlers and the central idler having an included angle therebetween and being inclined upwardly.
In an optional embodiment, the conveying mechanism further comprises at least one pair of edge supporting rollers, the two edge supporting rollers in the pair are respectively arranged on two sides of the frame, and the edge supporting rollers are used for limiting the conveying belt to move laterally.
In an alternative embodiment, the driving assembly comprises a motorized roller and a driven roller, and the conveying belt is in transmission connection with the motorized roller and the driven roller; the position of the motorized pulley and/or the driven pulley on the machine frame is adjustable in the feeding direction.
In an alternative embodiment, the frame is provided with a first cleaning mechanism at the discharge end for contacting the working surface of the conveyor belt to scrape the material from the conveyor belt.
In an alternative embodiment, a second cleaning mechanism is disposed on the frame and is used for contacting the non-working surface of the conveying belt to scrape foreign matters on the non-working surface of the conveying belt.
In a second aspect, the embodiments of the present invention provide a boom-type tunnel boring machine, including a boring main body, a conveyor connected to the boring main body, and a conveying arm according to any one of the foregoing embodiments, wherein the material receiving end of the frame is connected to the boring machine, and the conveyor is used for conveying materials to a conveying belt on a buffer roller assembly.
In an optional embodiment, the tunneling main body is provided with a connecting frame, a rotary table is arranged on the connecting frame, a material receiving end of the rack is rotatably connected to the rotary table, and a rotary oil cylinder is arranged between the rotary table and the connecting frame so as to realize that the conveying arm swings in the horizontal direction; and a supporting oil cylinder is arranged between the rotary table and the rack so as to realize the swinging of the conveying arm in the vertical direction.
The utility model discloses beneficial effect includes, for example:
the embodiment of the utility model provides a conveying arm includes frame and conveying mechanism, and conveying mechanism includes drive assembly, conveying roller subassembly, buffering roller subassembly and conveyer belt, and the conveyer belt transmission is connected in conveying roller subassembly and buffering roller subassembly, and buffering roller subassembly includes a plurality of buffer rollers of arranging in the feed direction, and conveying roller subassembly includes a plurality of conveying rollers of arranging in the feed direction, and a plurality of conveying rollers are arranged between discharge end and buffering roller subassembly; in the feeding direction, the arrangement density of the buffer rollers is greater than that of the conveying rollers. The buffer roller assembly has the advantages that the buffer roller spacing distance is small, the arrangement is dense, and the conveying belt can be well supported. When the material falls on the conveyer belt at the material receiving end, the conveyer belt is not easy to seriously deform under the support of the buffer roller, so that the conveyer belt is not easy to damage due to excessive deformation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a boom tunnel boring machine according to an embodiment of the present invention;
fig. 2 is a schematic view of a second view of the boom tunnel boring machine according to the embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
fig. 5 is a schematic view of the discharge end of the conveying arm according to the embodiment of the present invention.
Icon: 010-boom tunnel boring machine; 100-a transfer arm; 110-a rack; 120-a buffer roll; 122-middle buffer roll; 124-edge buffer rollers; 130-conveying rollers; 132-a middle carrier roller; 134-side idler; 136-edge rollers; 138-lower carrier rollers; 140-motorized roller; 142-an adjusting bolt; 150-a conveyor belt; 160-a first cleaning mechanism; 162-a second sweeping mechanism; 170-receiving hopper; 180-a flow blocking mechanism; 200-a tunneling body; 210-a connecting frame; 220-a turntable; 230-supporting oil cylinder; 240-rotary oil cylinder; 300-a conveyor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts 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 present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Fig. 1 is a schematic view of a cantilever type tunnel boring machine 010 according to an embodiment of the present invention; fig. 2 is a schematic view of a second view of the boom tunneling machine 010 according to an embodiment of the present invention. Referring to fig. 1 and 2, the present embodiment provides a conveying arm 100 and a boom type tunneling machine 010 having the conveying arm 100 mounted thereon, and as shown in the drawings, the boom type tunneling machine 010 includes a tunneling body 200, a conveyor 300 connected to the tunneling body 200, and the conveying arm 100 connected to the tunneling body 200. The tunneling body 200 is used for excavating and conveying materials to the conveyor 300, the conveyor 300 further transfers the materials to the conveying arm 100, and the conveying arm 100 conveys the materials to a truck or other transportation equipment to be sent out of a tunnel; the material has realized intermediary reprint, avoids the material secondary to fall to the ground, guarantees the continuity of material transportation, realizes shortening supplementary man-hour, reaches the purpose that improves tunnelling speed.
The tunneling body 200 is provided with a connecting frame 210, a rotary table 220 is arranged on the connecting frame 210, the frame 110 of the conveying arm 100 is rotatably connected to the rotary table 220, and a rotary oil cylinder 240 is arranged between the rotary table 220 and the connecting frame 210 so as to realize that the conveying arm 100 swings in the horizontal direction; a support cylinder 230 is provided between the turn table 220 and the frame 110 to realize the swing of the transfer arm 100 in the vertical direction. So set up, can make the discharge end of carrying arm 100 move in the space to accurately carry the material to in the haulage equipment such as truck.
The conveying arm 100 includes a frame 110 and a conveying mechanism disposed on the frame 110, and the frame 110 has a receiving end and a discharging end opposite to each other in a feeding direction. The conveying mechanism is used for conveying the materials from the receiving end to the discharging end. The material at the discharge end can fall into the transportation equipment such as a truck. In this embodiment, the frame 110 may be a unitary frame or may be formed by splicing multiple segments. The tunneling body 200 is provided with a connecting frame 210, a rotary table 220 is arranged on the connecting frame 210, the material receiving end of the rack 110 is rotatably connected to the rotary table 220, and a rotary oil cylinder 240 is arranged between the rotary table 220 and the connecting frame 210 so as to realize that the conveying arm 100 swings in the horizontal direction; a support cylinder 230 is provided between the turn table 220 and the frame 110 to realize the swing of the transfer arm 100 in the vertical direction. The receiving end of the frame 110 is rotatably connected with the rotary table 220 through two double-lug hinge points at two sides, and two ends of the supporting oil cylinder 230 are respectively connected with the frame 110 and the rotary table 220 so as to lift or lower the conveying arm 100. The number of the support cylinders 230 may be two. The supporting oil cylinder 230 adopts a reserved surplus stroke oil cylinder, and the conveying angle of the conveying arm 100 can be adjusted through the stroke of the supporting oil cylinder 230 on the spot according to the stacking angles of different materials, so that the conveying arm 100 has strong adaptability to conveying materials. One end of the rotary oil cylinder 240 is connected with the connecting frame 210, and the other end is connected with the end point of the rotary table 220, so that the force arm of the rotary oil cylinder 240 is maximized. The swing cylinder 240 may be disposed at the left or right side of the link frame 210, and the swing cylinder 240 controls the swing direction of the transfer arm 100 by pushing and pulling the swing table 220 to swing left and right, so that the material is accurately transferred into the truck bed.
The conveying mechanism comprises a driving assembly, a conveying roller 130 assembly, a buffer roller assembly and a conveying belt 150, the conveying belt 150 is in transmission connection with the conveying roller 130 assembly and the buffer roller assembly, the driving assembly is used for driving the conveying belt 150 to move, the buffer roller assembly is arranged at the receiving end of the frame 110, the buffer roller assembly comprises a plurality of buffer rollers 120 arranged in the feeding direction, the conveying roller 130 assembly comprises a plurality of conveying rollers 130 arranged in the feeding direction, and the plurality of conveying rollers 130 are arranged between the discharging end and the buffer roller assembly. In this embodiment, the driving assembly includes a motorized pulley 140 and a driven pulley, the motorized pulley 140 is located at the discharge end of the frame 110, the driven pulley is located at the receiving end of the frame 110, and the conveying roller 130 assembly and the buffer roller assembly are located between the motorized pulley 140 and the driven pulley, and support the conveying belt 150. The conveyor belt 150 is drivingly connected to the motorized pulley 140 and the driven pulley. In the present embodiment, the position of the motorized pulley 140 and/or the driven pulley on the frame 110 is adjustable in the feeding direction, which keeps the conveyor belt 150 in tension. In this embodiment, both ends of the motorized pulley 140 are disposed in the sliding slots of the frame 110, and the front and rear positions of the motorized pulley 140 can be adjusted by adjusting the bolts 142 to adjust the tension of the conveyor belt 150. Optionally, the adjusting bolt 142 is trapezoidal in thread to increase the power and speed of adjustment. Further, the discharge end of the frame 110 is further provided with a flow blocking mechanism 180, the flow blocking mechanism 180 is two plate bodies extending from the discharge end, and the flow blocking mechanism 180 limits the material from falling down between the two plate bodies to prevent the material from scattering.
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2; FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2; fig. 5 is a schematic view of the discharge end of the conveying arm 100 according to an embodiment of the present invention. Referring to fig. 1 to 5, in the embodiment of the present invention, in the feeding direction, the arrangement density of the buffer rollers 120 is greater than that of the conveying rollers 130, and the interval between the adjacent buffer rollers 120 is smaller than that between the adjacent conveying rollers 130. Because the receiving end can bear the impact of the material, the buffer rollers 120 are arranged more densely, so that the belt is not easy to excessively deform and damage under the supporting action of the denser buffer rollers 120. Specifically, the interval between the adjacent buffer rollers 120 may be set at 3 to 20 cm. In this embodiment, each buffer roller 120 includes a middle buffer roller 122 and two edge buffer rollers 124 connected to two ends of the middle buffer roller 122, the middle buffer roller 122 is horizontally disposed, and the two edge buffer rollers 124 and the middle buffer roller 122 have an included angle therebetween and are inclined upward to form a groove-shaped roller way. The part of the conveyer belt 150 on the buffer roller 120 is recessed to form a trough shape when being pressed by the material, so that the material is not easy to fall over in the trough-shaped conveyer belt 150, and the conveyer belt 150 is not easy to deviate.
The buffer roller assembly is located below the conveyor 300, and in order to better receive the material from the conveyor 300, the receiving end of the frame 110 is further provided with a receiving hopper 170. The receiving hopper 170 is located above the buffer roller assembly and the receiving hopper 170 has an opening at its lower end for feeding material to the conveyor belt 150 on the buffer roller assembly. The receiving hopper 170 is inwardly tapered on its inside surface so that the material can be better guided onto the conveyor belt 150 on the buffer roller assembly.
Similar to the buffer roller 120, each of the conveying rollers 130 includes a middle idler 132 and two side idlers 134 connected to both ends of the middle idler 132, and the two side idlers 134 are inclined upward with an included angle with the middle idler 132, thereby forming a groove-shaped roller way. The contained angle of side bearing roller 134 and horizontal direction can be adjusted as required, in this embodiment, adopts 30 degrees contained angles, and the interval between two adjacent conveying rollers 130 is within 0.8m, prevents to spill the material among the material transportation process.
In order to prevent the conveying belt 150 from deviating laterally, the conveying mechanism further includes at least one pair of edge rollers 136, and the two edge rollers 136 in the pair are symmetrically disposed on two sides of the frame 110. The edge rollers 136 can abut against the side edges of the conveyor belt 150 to limit lateral movement of the conveyor belt 150. In this embodiment, a pair of edge idlers 136 are disposed adjacent to the motorized pulley 140 and perpendicular to the side idlers 134.
Further, the conveyor mechanism also includes a plurality of lower rollers 138 disposed below the conveyor roller 130 assembly for guiding the conveyor belt 150.
In this embodiment, the conveyor belt 150 is a whole core PVG (flame retardant) patterned conveyor belt, which can increase the inclined upward conveying angle of the material compared with a flat belt, thereby reducing the length of the transfer conveyor and reducing the impact on the conveying arm 100. The whole core PVG belt can better resist the abrasion of the belt caused by rocks, and the service life of the conveying belt 150 is prolonged.
Optionally, the frame 110 is provided with a first cleaning mechanism 160, and the first cleaning mechanism 160 is located at the discharging end and is used for contacting the working surface of the conveyor belt 150 to scrape the material on the conveyor belt 150. Specifically, the first cleaning mechanism 160 is a horizontal cleaner disposed below the motorized pulley 140, and is fixed to the bottom of the frame 110 by a T-shaped groove and a T-shaped bolt, and the position of the horizontal cleaner can be adjusted back and forth by the T-shaped groove to adapt to the relative working position of the motorized pulley 140. The first cleaning mechanism 160 is in contact with the working surface of the conveyor belt 150 through the rubber plate, and removes the sticky material on the conveyor belt 150, so that the sticky material falls into a truck or other equipment.
Further, a second cleaning mechanism 162 is disposed on the frame 110, and the second cleaning mechanism 162 is used for contacting the non-working surface of the conveyor belt 150 to scrape off foreign matters on the non-working surface of the conveyor belt 150. Specifically, the second cleaning mechanism 162 is a plow-type cleaner, the plow-type cleaner is shaped like a Chinese character 'ren', and is fixed on a cross beam of the center line of the frame 110 by a pin shaft, and the tip of the plow-type cleaner is opposite to the moving direction of the non-working surface of the conveyor belt 150. The plow has a self-aligning function, and when the rubber sheet contacts the non-working surface of the conveyor belt 150, the material is guided to both sides of the conveyor belt 150 by the plow and is finally removed out of the conveyor belt 150. Thus, the driven roller (not shown in the figure), the electric roller 140 and the conveying belt 150 are ensured to be free of foreign matters and fully contacted, no material scratches the conveying belt 150 and the rollers in the middle, and the conveying belt 150 is prevented from slipping.
The present embodiment provides a conveying arm 100 and a cantilever type tunnel boring machine 010 mounted with the conveying arm 100, which have at least the following advantages:
due to the arrangement of the more closely arranged buffer roller assemblies, when the material falls from the conveyor 300 onto the conveyor belt 150, the buffer roller assemblies can provide good support for the conveyor belt 150 to prevent the conveyor belt 150 from being damaged due to impact deformation. The conveying roller 130 assembly and the buffering roller assembly are arranged into a groove-shaped roller way, so that material scattering can be effectively prevented. In addition, the frame 110 is provided with a first cleaning mechanism 160 and a second cleaning mechanism 162, which can scrape off the sticky foreign matters on the conveyor belt 150, ensure the cleanness of the conveyor belt 150, avoid damaging the roller and prevent the conveyor belt 150 from slipping. A rotary table 220 is adopted between the conveying arm 100 and the tunneling body 200 of the tunneling machine, and a supporting cylinder 230 and a rotary cylinder 240 are matched, so that the conveying arm 100 can swing and lift in a controlled manner to meet the use requirements under different conditions.
To sum up, the embodiment of the utility model provides a conveying arm, including frame and conveying mechanism, conveying mechanism includes drive assembly, conveying roller subassembly, buffering roller subassembly and conveyer belt, and the conveyer belt transmission is connected in conveying roller subassembly and buffering roller subassembly, and buffering roller subassembly includes a plurality of buffering rollers of arranging in the feed direction, and conveying roller subassembly includes a plurality of conveying rollers of arranging in the feed direction, and a plurality of conveying rollers are arranged between discharge end and buffering roller subassembly; in the feeding direction, the arrangement density of the buffer rollers is greater than that of the conveying rollers. The buffer roller assembly has the advantages that the buffer roller spacing distance is small, the arrangement is dense, and the conveying belt can be well supported. When the material falls on the conveyer belt at the material receiving end, the conveyer belt is not easy to seriously deform under the support of the buffer roller, so that the conveyer belt is not easy to damage due to excessive deformation.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A conveyor arm for a boom tunnel boring machine, comprising:
the device comprises a rack, a feeding device and a discharging device, wherein the rack is provided with a receiving end and a discharging end which are opposite in the feeding direction;
the conveying mechanism is arranged on the frame and used for conveying materials from the receiving end to the discharging end, the conveying mechanism comprises a driving assembly, a conveying roller assembly, a buffering roller assembly and a conveying belt, the conveying belt is in transmission connection with the conveying roller assembly and the buffering roller assembly, the driving assembly is used for driving the conveying belt to move, the buffering roller assembly is arranged on the receiving end of the frame and comprises a plurality of buffering rollers arranged in the feeding direction, the conveying roller assembly comprises a plurality of conveying rollers arranged in the feeding direction, and the plurality of conveying rollers are arranged between the discharging end and the buffering roller assembly; in the feeding direction, the arrangement density of the buffer rollers is greater than that of the conveying rollers;
every conveying roller all includes a idler and connects in two side idlers at idler both ends, two the side idler with have the contained angle between the idler to tilt up, conveying mechanism still includes at least a pair of limit idler, and two in pairs limit idler set up respectively in the frame both sides, the limit idler is used for restricting conveyer belt lateral shifting.
2. The transfer arm as in claim 1 wherein the receiving end of the frame is provided with a receiving hopper located above the buffer roller assembly and having an opening at its lower end for transferring material to a conveyor belt on the buffer roller assembly.
3. The transfer arm as in claim 1, wherein each of the buffer rollers comprises a middle buffer roller and two edge buffer rollers connected to two ends of the middle buffer roller, and the two edge buffer rollers and the middle buffer roller are inclined upward with an included angle therebetween.
4. The transfer arm of claim 1, wherein the drive assembly includes a motorized roller and a driven roller, the belt being drivingly connected to the motorized roller and the driven roller; the position of the motorized pulley and/or the driven pulley on the machine frame is adjustable in the feeding direction.
5. The transfer arm of claim 1, wherein the frame includes a first sweeping mechanism disposed thereon at the discharge end for contacting a working surface of the belt to scrape material from the belt.
6. The transfer arm of claim 1, wherein the frame is provided with a second cleaning mechanism for contacting the non-working surface of the transfer belt to scrape foreign matter from the non-working surface of the transfer belt.
7. A boom tunnel boring machine comprising a boring body to which a receiving end of the machine frame is attached, a conveyor connected to the boring body for conveying material to a conveyor belt on the buffer roller assembly, and a conveyor arm according to any one of claims 1 to 6.
8. A boom tunnel boring machine according to claim 7, wherein the boring main body is provided with a link frame on which a turntable is provided, the receiving end of the machine frame being rotatably connected to the turntable, a rotary cylinder being provided between the turntable and the link frame to effect horizontal swinging of the transport arm; and a supporting oil cylinder is arranged between the rotary table and the rack so as to realize that the conveying arm swings in the vertical direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921465373.0U CN210854149U (en) | 2019-09-04 | 2019-09-04 | Conveying arm and cantilever type tunnel boring machine |
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| CN201921465373.0U CN210854149U (en) | 2019-09-04 | 2019-09-04 | Conveying arm and cantilever type tunnel boring machine |
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| CN210854149U true CN210854149U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110422582A (en) * | 2019-09-04 | 2019-11-08 | 三一重型装备有限公司 | Conveying arm and cantilevered rock tunnel(ling) machine |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110422582A (en) * | 2019-09-04 | 2019-11-08 | 三一重型装备有限公司 | Conveying arm and cantilevered rock tunnel(ling) machine |
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