CN114275668A - Cutter head lifting lug device - Google Patents
Cutter head lifting lug device Download PDFInfo
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- CN114275668A CN114275668A CN202210008471.1A CN202210008471A CN114275668A CN 114275668 A CN114275668 A CN 114275668A CN 202210008471 A CN202210008471 A CN 202210008471A CN 114275668 A CN114275668 A CN 114275668A
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- lifting lug
- cutter head
- movable
- lug
- movable lifting
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Abstract
The invention discloses a cutter head lifting lug device, which comprises: the movable lifting lug is provided with a hook groove used for clamping and embedding a large ring of the cutter head, and is also provided with a waist-shaped hole which is positioned below the hook groove; one end of the lifting lug fixing bolt is used for penetrating through the waist-shaped hole and is fixed on the fixing sleeve of the cutter head; fixing an auxiliary turning-over lifting lug, wherein the auxiliary turning-over lifting lug is fixed by a side cutter box plate close to the cutter head; in the hoisting process, the top of the movable lifting lug is fixed on the shackle, the hook groove is embedded in the large circular ring of the cutter head in a clamping manner, the lifting lug fixing bolt is fixedly connected with the fixing sleeve through the waist-shaped hole, and the movable lifting lug and the fixed auxiliary turning-over lifting lug are hoisted so as to hoist the cutter head.
Description
Technical Field
The invention relates to the technical field of shield tunneling, in particular to a cutter head lifting lug device.
Background
The cutter head is positioned at the foremost end of the shield machine and is an important component of the shield machine. In each link of shield cutter head manufacturing, workshop assembly and debugging, construction site assembly, disassembly after completion of engineering projects, cutter head maintenance and reuse and the like, the cutter head needs to be hoisted or turned over. The whole process is overall observed, the cutter head needs to be hoisted for a plurality of times, and how to safely, quickly, conveniently, reliably and economically realize hoisting of the cutter head is a considerable problem.
The hoist and mount of shield structure blade disc adopts welded lug form initially, this kind of mode, lug simple structure is reliable, and in the workshop manufacture process, maneuverability is strong, but accomplishes the equipment at the building site, before starting to tunnel, then need to dig out the lug, the lug position of polishing, later at corresponding position repair welding antifriction plate or build-up welding abradability, this operation process belongs to the high altitude construction category, and the degree of difficulty is big, and the risk is high. In addition, after the engineering project is finished, the cutter head is disassembled, maintained, recycled and the like, wear resistance of a wear-resisting plate or surfacing welding at a lifting point position needs to be planed, then a lifting lug is welded, time and labor are wasted, materials are wasted, repeated welding, grinding, cutting, planing and the like are also greatly damaged for the structural strength of the cutter head, so that the lifting in the form is gradually replaced, and the detachable lifting is designed and used in practice.
Disclosure of Invention
The invention aims to provide a cutter head lifting lug device, wherein a movable lifting lug is detachable, simple to install, convenient to detach and capable of being recycled.
In order to achieve the above object, the present invention provides a cutter head lifting lug device, including:
the movable lifting lug is provided with a hook groove used for clamping and embedding a large ring of the cutter head, and is also provided with a waist-shaped hole which is positioned below the hook groove;
one end of the lifting lug fixing bolt is used for penetrating through the waist-shaped hole and is fixed on the fixing sleeve of the cutter head;
fixing an auxiliary turning-over lifting lug, wherein the auxiliary turning-over lifting lug is fixed by a side cutter box plate close to the cutter head;
in the hoisting process, the top of the movable lifting lug is fixed on the shackle, the hook groove is embedded in the large circular ring of the cutter head in a clamping manner, the lifting lug fixing bolt is fixedly connected with the fixing sleeve through the waist-shaped hole, and the movable lifting lug and the fixed auxiliary turning-over lifting lug are hoisted so as to hoist the cutter head.
Optionally, the movable lifting lug is arranged to be in a hook shape, the hook groove comprises a horizontal section and a vertical section which are connected with each other, the horizontal section is used for being attached to the inner wall of the large circular ring, the vertical section is used for being attached to the end face of the large circular ring, and an avoiding space is arranged between the vertical section and the front shield of the cutter head.
Optionally, the movable lifting lug is further provided with a through hole, the through hole is located above the hook groove, and the through hole is detachably connected with the shackle.
Optionally, the first end of the lifting lug fixing bolt is provided with an external thread, the first end is used for penetrating through a waist-shaped hole and then fastening the waist-shaped hole on a fixing sleeve of the cutter head, the size of the second end of the lifting lug fixing bolt is larger than that of the first end, and the second end is used for abutting against the end face of the movable lifting lug.
Optionally, the second end is further provided with a fastening hole at its outer periphery, and the tool is rotated after being inserted into the fastening hole, so that the fixing of the lifting lug fixing bolt and the movable lifting lug is reliable.
Optionally, a lifting lug baffle is further arranged between the second end and the end face of the movable lifting lug, and friction between the second end and the end face of the movable lifting lug is increased through the lifting lug baffle.
Optionally, the hoisting device further comprises a sealing element for plugging the connecting hole of the fixing sleeve when the hoisting device is not lifted.
Optionally, the outer side of the sealing element is further provided with a blocking cover plate, and the blocking cover plate is detachably connected with the fixing sleeve through a blocking fastener.
Optionally, the movable lifting lug comprises a movable lifting lug plate and lifting lug reinforcing plates, the movable lifting lug plate is provided with a waist-shaped hole, and the two lifting lug reinforcing plates are respectively arranged on two end faces of the movable lifting lug plate.
Optionally, the movable lifting lug is further provided with a small lifting lug, and the small lifting lug and the hook groove are respectively located on two sides of the movable lifting lug.
Compared with the background technology, the cutter head lifting lug device provided by the invention comprises: the movable lifting lug is provided with a hook groove used for clamping and embedding a large circular ring of the cutter head, and is also provided with a waist-shaped hole which is positioned below the hook groove; one end of the lifting lug fixing bolt is used for penetrating through the waist-shaped hole and is fixed on the fixing sleeve of the cutter head; the fixed auxiliary turning-over lifting lug is fixed by a side knife box plate close to the cutter head; in the hoisting process, the top of the movable lifting lug is fixed on the shackle, the hook groove is embedded in the large circular ring of the cutter head in a clamping manner, the lifting lug fixing bolt is fixedly connected with the fixing sleeve through the waist-shaped hole, and the movable lifting lug and the fixed auxiliary turning-over lifting lug are hoisted so as to hoist the cutter head.
According to the cutter head lifting lug device, the movable lifting lug can be detached relative to the cutter head, the installation is simple, the detachment is convenient, the movable lifting lug can be recycled, the movable lifting lug is connected with the fixed sleeve of the cutter head through the lifting lug fixing bolt, the limitation on the placement position of the movable lifting lug is small, the influence of the cutter head structure is small, the application range is wide, only the inner surface of a large ring is a weighted surface during lifting, and the structure of the cutter head lifting lug device is reliable and stable; hook groove through activity lug carries out the inlay card to big ring, can effectually fix the position of lifting by crane the blade disc, reduce the risk that the blade disc drops, meanwhile, lug fixing bolt does not bear the gravity of blade disc, play and connect limiting displacement, effectively prevent the structural failure, set up fixed supplementary lug that stands up in the circumferential direction of limit cutter boxboard, fixed supplementary lug that stands up need not dismantle after the hoist and mount is ended, can restrict the effect of particle diameter when the tunnelling, removable activity lug stands up lug synergism with two fixed assists, the blade disc lifts by crane, the upset is more quick and safe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a cutter head lifting lug device installed on a cutter head according to an embodiment of the invention;
FIG. 2 is a schematic view taken along direction A in FIG. 1;
FIG. 3 is a schematic view in the direction B of FIG. 1;
FIG. 4 is a schematic view of the C-C direction of FIG. 2 during hoisting;
FIG. 5 is a schematic view of the C-C direction of FIG. 2 during tunneling;
fig. 6 is a schematic view of a movable lifting lug of the cutter head lifting lug device provided by the embodiment of the invention;
wherein:
a cutter head 1, a large circular ring 1-1, a first side cutter box plate 1-2, a reinforcing plate 1-3, a second side cutter box plate 1-4, a third side cutter box plate 1-5, a fixed sleeve 1-6, a sealing plate 1-7,
A movable lifting lug 2, a movable lifting lug plate 2-1, a lifting lug reinforcing plate 2-2, a small lifting lug 2-3, a through hole 2-1-1, a kidney-shaped hole 2-1-2, a horizontal section 2-1-3, a vertical section 2-1-4,
A lifting lug fixing bolt 3,
A lifting lug baffle 4,
A fixed auxiliary turning-over lifting lug 5,
A plugging cover plate 6,
A sealing element 7,
A plugging fastener 8,
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The blade disc lug device that this application embodiment provided, refer to description attached figure 1 to fig. 6, include: the movable lifting lug 2, the lifting lug fixing bolt 3 and the fixed auxiliary turnover lifting lug 5 are arranged on the cutter head lifting lug device and are used for lifting the cutter head 1.
The movable lifting lug 2 is provided with a hook groove which is used for clamping and embedding the large circular ring 1-1 of the cutter head 1, and the hook groove can effectively fix the position of the lifting cutter head 1 and reduce the risk of falling off of the cutter head 1. The movable lifting lug 2 is also provided with a waist-shaped hole 2-1-2, and the waist-shaped hole 2-1-2 is positioned below the hook groove; one end of the lifting lug fixing bolt 3 is fixed on a fixing sleeve 1-6 of the cutter head 1 after penetrating through the waist-shaped hole 2-1-2.
The large circular ring 1-1 is used as a main body structure of the cutter head 1, components such as a fixing sleeve 1-6, a sealing plate 1-7, a side cutter box plate and the like are welded on the large circular ring 1-1, the side cutter box plate comprises a first side cutter box plate 1-2, a second side cutter box plate 1-4 and a third side cutter box plate 1-5, the first side cutter box plate 1-2 and the fixing sleeve 1-6 are located on the upper portion of the cutter head 1, and the second side cutter box plate 1-4 and the third side cutter box plate 1-5 are located on the lower portion of the cutter head 1. The first side tool box plate 1-2 is provided with a through hole for welding and fixing with the fixing sleeve 1-6; the reinforcing plate 1-3 can be welded on the outer side of the first edge cutter box plate 1-2, so that the structural strength is effectively enhanced; the fixed sleeve 1-6 is welded and fixed with the first side cutter box plate 1-2 and the reinforcing plate 1-3 on the outer side. It can be seen that the length of the fixed sleeves 1-6 is determined according to the central position of the cutter head 1 when the center line of the movable lifting lug 2 is positioned at the vertical position, so that the stability and reliability of hoisting are fully ensured, and the stress of the movable lifting lug 2 is effectively reduced; the exposed cylindrical surfaces of the fixed sleeves 1-6 can be welded with wear-resistant welding layers, so that the wear can be effectively prevented during tunneling.
The number of the fixed auxiliary turning-over lifting lugs 5 can be two, one of the fixed auxiliary turning-over lifting lugs 5 is arranged close to the second side cutter box plate 1-4, the other fixed auxiliary turning-over lifting lug 5 is arranged close to the third side cutter box plate 1-5, the second side cutter box plate 1-4 and the third side cutter box plate 1-5 can be symmetrically arranged at the lower part of the cutter head 1, namely, the two fixed auxiliary turning-over lifting lugs 5 are welded at proper positions close to the second side cutter box plate 1-4 and the third side cutter box plate 1-5, and the fixed auxiliary turning-over lifting lugs are used for direction conversion and turning over of the cutter head 1.
The fixed auxiliary turning-over lifting lug 5 is welded along the circumferential direction of the cutter head 1, the cutter head 1 does not need to be planed after the lifting is completed, when the cutter head 1 is in tunneling, the fixed auxiliary turning-over lifting lug 5 can play a role in limiting the particle size, and the phenomenon that pebbles with large particle size or large rocks with large particle size enter a back soil bin of the cutter head 1 and cannot be output by a screw conveyor is prevented.
In the hoisting process, the top of the movable lifting lug 2 is fixed on the shackle, the hook groove of the movable lifting lug 2 is embedded in the large circular ring 1-1 of the cutter head 1 in a clamping manner, the lifting lug fixing bolt 3 is fixedly connected with the fixing sleeve 1-6 through the waist-shaped hole 2-1-2, and the movable lifting lug 2 and the fixed auxiliary turning-over lifting lug 5 are hoisted to hoist the cutter head 1.
It can be seen that the movable lifting lug 2 is provided with a hook groove, and the large ring 1-1 is clamped in the hook groove. When the cutter head 1 is hoisted, only the inner surface of the large circular ring 1-1 is a weighted surface, so that the hoisting process is reliable and stable. Meanwhile, the lower half part of the movable lifting lug 2 is provided with a kidney-shaped hole 2-1-2 for the penetration of a lifting lug fixing bolt 3, the movable lifting lug 2 is in clearance fit with the lifting lug fixing bolt 3, when the cutter head 1 is lifted, the lifting lug fixing bolt 3 is not stressed, the lifting lug fixing bolt 3 is only used for connecting the movable lifting lug 2 and the cutter head 1, and plays a role in limiting the movable lifting lug 2 to slide along the horizontal direction,
the movable lifting lug 2 can be arranged in a hook shape, the hook groove comprises a horizontal section 2-1-3 and a vertical section 2-1-4 which are connected with each other, the horizontal section 2-1-3 is used for being attached to the inner wall of the large circular ring 1-1, the vertical section 2-1-4 is used for being attached to the end face of the large circular ring 1-1, and an avoidance space is arranged between the vertical section 2-1-4 and the front shield 9 of the cutter head 1. That is, the length of the horizontal section 2-1-3 is ensured to match the height of the large circular ring 1-1, and the height of the vertical section 2-1-4 is ensured not to interfere with the inner surface of the anterior shield 9.
The movable lifting lug 2 is also provided with a through hole 2-1-1, the through hole 2-1-1 is positioned above the hook groove, and the through hole 2-1-1 is used for detachably connecting with the shackle.
The steps of hoisting (process from horizontal to vertical) the cutterhead 1 can be broadly summarized as follows:
firstly: from the inside of the large circular ring 1-1 of the cutter head 1, the movable lifting lug 2 is arranged from the top surface to the bottom surface of the large circular ring 1-1, and the large circular ring 1-1 is clamped into the hook groove of the movable lifting lug 2;
then: a lifting lug fixing bolt 3 penetrates through a waist-shaped hole 2-1-2 formed in the lower half part of the movable lifting lug plate 2-1 to connect the movable lifting lug 2 with a fixing sleeve 1-6 of the cutter head 1, a lifting lug baffle plate 4 can be arranged between the lifting lug fixing bolt 3 and the movable lifting lug 2, and the friction force between the second end and the end surface of the movable lifting lug 2 is increased through the lifting lug baffle plate 4 to increase the contact stress surface;
then: a lifting appliance shackle pin shaft penetrates through a through hole 2-1-1 formed in the upper half part of the movable lifting lug 2, the movable lifting lug 2 is connected with a lifting appliance shackle, and the lifting appliance shackle pin shaft is pulled by a steel wire rope to prepare for lifting;
and then: two shackles for the other lifting appliance are respectively connected with two fixed auxiliary turning lifting lugs 5 on the cutter head 1 through shackles pin shafts, and are pulled by a steel wire rope to be lifted;
and finally: the lifting appliance simultaneously lifts the movable lifting lug 2 and the fixed auxiliary turning-over lifting lug 5 from the same side, lifts the cutter head 1 to a height which is a proper distance from the ground in the air (namely the cutter head 1 is vertically placed at a position which does not touch the ground), and then slowly falls the fixed auxiliary turning-over lifting lug 5 until the cutter head 1 is in a vertical lifting state, namely the lifting of the cutter head 1 is completed (the process of turning from the horizontal to the vertical).
The first end of the lifting lug fixing bolt 3 is provided with external threads and is used for penetrating through a kidney-shaped hole 2-1-2 and then being fastened on a fixing sleeve 1-6 of the cutter head 1, the size of the second end of the lifting lug fixing bolt 3 is larger than that of the first end, the second end of the lifting lug fixing bolt is used for abutting against the end face of the movable lifting lug 2, namely, a counter bore is formed in one side of the fixing sleeve 1-6 and is sealed through a sealing plate 1-7, and a threaded hole is formed in the other side of the fixing sleeve 1-6 and is used for being in threaded connection with the lifting lug fixing bolt 3.
The periphery of the second end of the lifting lug fixing bolt 3 is also provided with a fastening hole, and the tool is rotated after extending into the fastening hole, so that the lifting lug fixing bolt 3 and the movable lifting lug 2 are reliably fixed, namely, one side of the lifting lug fixing bolt 3 is provided with an external thread, the other side of the lifting lug fixing bolt 3 can be provided with four fastening holes in the radial direction of the bolt head, and the tool rotates after extending into the fastening holes and is used for screwing the lifting lug fixing bolt 3; of course, the fastening manner of the lifting lug fixing bolt 3 is not limited to the arrangement of four fastening holes, and other manners can be adopted to fasten the lifting lug fixing bolt 3.
The cutter head lifting lug device also comprises a sealing element 7, and the sealing element 7 is used for plugging the connecting holes of the fixing sleeves 1-6 when the cutter head lifting lug device is not lifted. The outer side of the sealing element 7 is also provided with a plugging cover plate 6, and the plugging cover plate 6 is detachably connected with the fixed sleeves 1-6 through a plugging fastener 8. That is, after the cutter head 1 is finished being assembled and hoisted, the lifting lug baffle 4 and the movable lifting lug 2 are disassembled, and the plugging cover plate 6, the sealing element 7 and the plugging fastening element 8 are installed, so that the protection of the internal thread holes (connecting holes) of the fixed sleeves 1-6 is completed.
The movable lifting lug 2 comprises a movable lifting lug plate 2-1 and lifting lug reinforcing plates 2-2, the waist-shaped holes 2-1-2 are formed in the movable lifting lug plate 2-1, the two lifting lug reinforcing plates 2-2 are respectively arranged on two end faces of the movable lifting lug plate 2-1, and the lifting lug reinforcing plates 2-2 can be welded on the two end faces of the movable lifting lug plate 2-1, so that the structural strength of the movable lifting lug 2 is enhanced.
The movable lifting lug 2 is also provided with small lifting lugs 2-3, the small lifting lugs 2-3 and the hook grooves are respectively positioned at two sides of the movable lifting lug 2, and it can be seen that the movable lifting lug 2 comprises a movable lifting lug plate 2-1, a lifting lug reinforcing plate 2-2 and small lifting lugs 2-3, the upper half part of the movable lifting lug plate 2-1 is provided with a through hole 2-1-1 for penetrating a shackle pin shaft, the position of the through hole 2-1-1 is determined by the structure of a shackle for lifting, and the shackle can be ensured to be more than 90 degrees around the through hole. The lower half part of the movable lifting lug plate 2-1 is provided with a waist-shaped hole 2-1-2 through which a lifting lug fixing bolt 3 passes, and the movable lifting lug 2 is provided with a small lifting lug 2-3, so that the movable lifting lug 2 is favorably transported and installed.
The vertical hoisting steps aiming at the cutter head 1 are as follows:
the lifting appliance connected with the auxiliary turning-over lifting lug 5 does not work, and the lifting appliance pulls the movable lifting lug 2 to vertically lift the cutter head 1 to a target position;
the process of hoisting the cutterhead 1 from vertical to horizontal is opposite to the process of hoisting the cutterhead 1 from horizontal to vertical, and the description is omitted here.
The turning-over steps for the cutter head 1 are as follows:
when the cutter head 1 is in a vertical state, the lifting appliance positioned on the fixed auxiliary turning-over lifting lug 5 is detached, after the other opposite side of the cutter head 1 is connected with the lifting appliance again, the fixed auxiliary turning-over lifting lug 5 is slowly lifted, and the movable lifting lug 2 is dropped until the cutter head 1 is in a horizontal state, so that the turning-over of the cutter head 1 is completed.
After the cutter head 1 is lifted, the lifting lug fixing bolt 3, the movable lifting lug 2 and the lifting lug baffle 4 are disassembled, and the plugging cover plate 6, the sealing element 7 and the plugging fastening piece 8 are installed.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The cutter head lifting lug device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A cutter head lug device is characterized by comprising:
the movable lifting lug is provided with a hook groove used for clamping and embedding a large circular ring of the cutter head, and is also provided with a waist-shaped hole which is positioned below the hook groove;
one end of the lifting lug fixing bolt is used for penetrating the waist-shaped hole and is fixed on the fixing sleeve of the cutter head;
the auxiliary turning-over lifting lug is fixed by a side cutter box plate close to the cutter head;
in the hoisting process, the top of the movable lifting lug is fixed on the shackle, the hook groove is embedded in the large circular ring of the cutter head in a clamping manner, the lifting lug fixing bolt passes through the waist-shaped hole and the fixing sleeve for fixed connection, and the movable lifting lug and the fixed auxiliary turnover lifting lug are hoisted so as to hoist the cutter head.
2. The cutter head lifting lug device according to claim 1, wherein the movable lifting lug is in a hook shape, the hook groove comprises a horizontal section and a vertical section which are connected with each other, the horizontal section is attached to the inner wall of the large circular ring, the vertical section is attached to the end face of the large circular ring, and an avoidance space is formed between the vertical section and the front shield of the cutter head.
3. The cutter head lifting lug device according to claim 1, wherein the movable lifting lug is further provided with a through hole, the through hole is positioned above the hook groove, and the through hole is detachably connected with a shackle.
4. The cutter head lifting lug device according to claim 1, wherein a first end of the lifting lug fixing bolt is provided with an external thread, the first end is used for being fastened on a fixing sleeve of the cutter head after penetrating through the kidney-shaped hole, the size of a second end of the lifting lug fixing bolt is larger than that of the first end, and the second end is used for abutting against the end face of the movable lifting lug.
5. The cutter head lifting lug device according to claim 4, wherein the second end is further provided with a fastening hole at the periphery, and the tool is rotated after being inserted into the fastening hole, so that the lifting lug fixing bolt and the movable lifting lug are reliably fixed.
6. The cutterhead lug apparatus according to claim 4, wherein a lug baffle is further provided between said second end and the end surface of said movable lug, whereby friction between said second end and the end surface of said movable lug is increased by said lug baffle.
7. The cutter head lifting lug device according to any one of claims 1-6, further comprising a sealing member for sealing off the connecting hole of the fixing sleeve when the cutter head is not lifted.
8. The cutter head lifting lug device according to claim 7, wherein a blocking cover plate is further arranged on the outer side of the sealing element, and the blocking cover plate is detachably connected with the fixing sleeve through a blocking fastener.
9. The cutter head lifting lug device according to any one of claims 1 to 6, wherein the movable lifting lug comprises a movable lifting lug plate and lifting lug reinforcing plates, the movable lifting lug plate is provided with the waist-shaped hole, and the two lifting lug reinforcing plates are respectively arranged on two end faces of the movable lifting lug plate.
10. The cutter head lifting lug device according to claim 9, wherein the movable lifting lug is further provided with a small lifting lug, and the small lifting lug and the hook groove are respectively positioned at two sides of the movable lifting lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210008471.1A CN114275668A (en) | 2022-01-05 | 2022-01-05 | Cutter head lifting lug device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210008471.1A CN114275668A (en) | 2022-01-05 | 2022-01-05 | Cutter head lifting lug device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114275668A true CN114275668A (en) | 2022-04-05 |
Family
ID=80880506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210008471.1A Pending CN114275668A (en) | 2022-01-05 | 2022-01-05 | Cutter head lifting lug device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114275668A (en) |
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2022
- 2022-01-05 CN CN202210008471.1A patent/CN114275668A/en active Pending
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