CN217421185U - Shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device - Google Patents
Shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device Download PDFInfo
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- CN217421185U CN217421185U CN202120945583.0U CN202120945583U CN217421185U CN 217421185 U CN217421185 U CN 217421185U CN 202120945583 U CN202120945583 U CN 202120945583U CN 217421185 U CN217421185 U CN 217421185U
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Abstract
The utility model provides a shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device relates to a construction equipment protection device who uses in the underground works field. The cross-shaped cutter beam is characterized by also comprising a plurality of edge hobs and a plurality of hob protection frame devices; the number of the edge hob and the hob protective frame devices is the same; the cross-shaped knife beam is arranged on the cutter head; edge hobs are symmetrically distributed on the cross-shaped cutter beam left and right, the fixed ends of the edge hobs are embedded into a reserved position in the cutter head and fixed, and a cutter body structure of the working end of the edge hob keeps a certain inclination angle with the plane where the cutter head is located; the utility model provides a device can effectually slow down the striking effect of hard rock to the marginal hobbing cutter in the boulder stratum, avoids the problem that drops of hobbing cutter, and when the cutter took place seriously eccentric wear, the bearer bar can also replace cutter wearing and tearing simultaneously, and protection edge hobbing cutter sword hub is not destroyed, guarantees the construction progress.
Description
Technical Field
The utility model relates to a construction equipment protection device who uses in the underground works field, in particular to shield constructs protection frame device of quick-witted hobbing cutter suitable for boulder stratum.
Background
With the rapid development of underground engineering industry in China, particularly the construction of urban underground tracks and comprehensive pipe galleries, more and more underground engineering adopts a shield method for tunneling construction. During shield tunneling construction, the stable operation of the shield machine cutter is the premise of ensuring the construction efficiency and the construction cost. However, in some special strata, the impact of hard rock can cause the hobbing cutter to drop, leads to the cutter to become invalid, reduces the efficiency of construction, will directly influence the construction progress, therefore the protection to shield constructs quick-witted cutter head cutter is awaited for help and admirable solution.
At present, in the existing protection measures, a knife box and a knife hub of a knife are generally transformed and protected, and the protection of the whole knife is rarely carried out. In the tunneling process of the shield tunneling machine, aiming at adverse geological conditions, particularly in a boulder stratum environment, hard rocks impact the edge hob, damage of a cutter of the shield tunneling machine is easily caused, the cutter fails, frequent opening and cutter changing are needed, the tunneling efficiency is reduced, and meanwhile, when the cutter is seriously worn and loses the working capacity of the cutter in a stratum with large abrasion, the cutter further wears the cutter hub along with the propulsion of the cutter, the safety of the cutter is damaged, and even the safety of the whole cutter structure is influenced.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above problems, it is necessary to develop a hob protection frame device of a shield machine.
The utility model discloses a device for welding the hob protection frame on the hob box around the hob cutter at the edge of the shield machine, so that the hob cutter of the shield machine can effectively avoid the impact of boulder from damaging the cutter, and the normal use of the hob cutter of the shield machine is ensured; meanwhile, when the cutter is abraded to a certain degree, in order to prevent surrounding rocks from further abrading the cutter hub, the protective frame can replace the cutter hub to bear abrasion, and a wear-resistant layer is laid on the protective frame, so that the wear-resistant performance of the protective frame is improved, and the shield machine hob protective frame device suitable for the boulder stratum is realized.
The purpose of the utility model can be realized by the following technical proposal:
a shield tunneling machine cutter head with a hob cutter protection frame device and suitable for boulder strata comprises a cross cutter beam, and is characterized by further comprising a plurality of edge hobs and a plurality of hob cutter protection frame devices;
the number of the edge hob and the hob protective frame devices is the same;
the cross-shaped knife beam is arranged on the cutter head (7);
edge hobs (A, B, C, D, E, F, G, H) are distributed on the cross knife beam in a bilateral symmetry manner, the fixed end of the edge hob (A, B, C, D, E, F, G, H) is embedded into a reserved position in the cutter head (7) and fixed, and a cutter body structure of the working end of the edge hob (A, B, C, D, E, F, G, H) keeps a certain inclination angle with the plane where the cutter head (7) is located;
the hob protective frame device comprises a hob box (3) and a protective frame (4);
edge hob (A, B, C, D, E, F, G, H) includes the cutter body structure of work end, and cutter ring (1), sword hub (2), arbor (5) three make up the cutter body structure of edge hob (A, B, C, D, E, F, G, H), wherein: the cutter ring (1) and the cutter hub (2) are arranged on the cutter shaft (5), the cutter ring (1) is arranged on the cutter hub (2), and the cutter hub (2) is arranged on the cutter shaft (5); the cutter body structure of the edge hob (A, B, C, D, E, F, G, H) is arranged in the cutter box (3), and the cutter box (3) is arranged on the cutter head (7).
In the operation process of the shield tunneling machine, the cutter head (7) integrally rotates under the action of an external driving device, so that a cutter body structure of the edge hob (A, B, C, D, E, F, G, H) is driven to rotate around the center of the cutter head (7), and the cutter head (7) moves towards the direction of a shield tunneling surface under the action of the thrust force of the shield tunneling machine, so that the cutter ring (1) crushes and excavates a section rock (soil) body, and further the excavation work of the tunnel surface is completed;
the protective frame (4) is arranged around the cutter box (3) in a symmetrical mode in the axial direction of the cutter shaft (5) and the radial direction of the cutter ring (1), welding is fixedly arranged on the upper portion of the cutter box (3), the protective frame (4) prevents the edge hob from falling due to rock impact, meanwhile, the protective frame can replace the cutter ring (1) to be abraded to a certain extent when the cutter is seriously eccentric, and the cutter hub (2) can be protected from being damaged.
Furthermore, the cross section of the protective frame (4) is distributed in a trapezoidal shape, the outer side surface (4-1) of the protective frame is perpendicular to the knife box (3), the inner side surface (4-2) of the protective frame and the knife box (3) form a certain included angle, and the included angle is within the range of 30-45 degrees, so that the gravelly soil can automatically fall off, and the excavation of the knife body is not influenced;
further, the height of bearer bar (4) should be greater than the distance of hobbing cutter sword hub (2) outward flange apart from sword case (3) top, is less than the distance of hobbing cutter sword circle (1) to sword case (3) top and the theoretical penetration difference of hobbing cutter to satisfy factor of safety, in order to guarantee that the hobbing cutter can normal use.
Further, a wear-resistant layer (6) is arranged on the top of the protection frame (4); the high-chromium cast iron material is arranged on the protective frame (4) in a strip-shaped wear-resistant grid mode in a melting mode to form a wear-resistant layer (6), so that the wear resistance of the protective frame (4) is improved.
The utility model has the advantages that: when the shield passes through unfavorable geological conditions such as a boulder stratum, the boulder and the like in the shield tunneling surface have high strength, the impact force caused by excavation is large, the cutter of the shield tunneling machine is easy to damage, the cutter fails, frequent opening and cutter changing are needed, the tunneling efficiency is reduced, and meanwhile, when the cutter is seriously abraded and loses the working capacity of the cutter in a stratum with large abrasion, the cutter further abrades the cutter hub along with the propulsion of the cutter, the safety of the cutter is damaged, and even the safety of the whole cutter structure is affected. The utility model discloses to above problem, design hobbing cutter guard frame device can effectually slow down the striking effect of hard rock to the marginal hobbing cutter in the boulder stratum, avoids the problem that drops of hobbing cutter, and when the cutter takes place seriously eccentric wear, the guard frame can also replace the cutter wearing and tearing simultaneously, and protection marginal hobbing cutter sword hub is not destroyed, guarantees the construction progress.
Drawings
FIG. 1 shows the arrangement of edge hobs with assembled protective frames on the cutterhead;
FIG. 2 is a top view of an edge hob A with an assembled protective frame;
FIG. 3 is a front view of the edge hob A with the assembled protective frame taken in cross-section 2-2;
FIG. 4 is a left side view of the assembled bezel edge hob A taken along section 1-1;
digital identification:
ABCDEFGH-edge hob;
1. a cutter ring; 2. a cutter hub; 3. a knife box; 4. a protective frame; 5. a cutter shaft; 6. a wear layer; 7. a cutter ring; 4-1, the outer side surface 4-2 of the protective frame and the inner side surface of the protective frame
Detailed Description
To facilitate understanding, the present invention will now be described more fully hereinafter with reference to the accompanying drawings. In the embodiment, a shield tunneling project in a certain large boulder zone is taken as a background, the boulder content of the stratum is high and can reach 70-90%, the boulder particle size is mainly 20-40 cm, and the maximum particle size reaches 66 cm; the local part contains large-particle-size and high-strength boulders, the compressive strength is generally 40-200 MPa, and the strength of individual boulders reaches 299 MPa. Because the high, the distribution of boulder monomer compressive strength is discrete, causes the broken rock degree of difficulty big, and is great to the impact of blade disc simultaneously, causes the circumstances such as the construction process blade disc card is dead, cutter wearing and tearing are serious or the hobbing cutter bursts apart easily, chooses for use the shield structure hobbing cutter machine protection frame device of this application for this reason. Simultaneously this interval adopts iron to build heavy industry shield structure machine and excavates, and shield structure machine cutter parameter is 432mm for the hobbing cutter radius, and the distance of marginal hobbing cutter cutting edge to sword case top is 135mm, and the distance of hobbing cutter sword hub outward flange apart from sword case top is 130mm, and concrete step is as follows:
as shown in fig. 1, 2, 3 and 4, the shield tunneling machine cutterhead with hob protection frame devices suitable for boulder strata of the present invention comprises a cross-shaped cutter beam, and is characterized by further comprising a plurality of edge hobs and a plurality of hob protection frame devices;
the number of the edge hob and the hob protective frame devices is the same;
the cross knife beam is arranged on the cutter head (7);
edge hobs (A, B, C, D, E, F, G, H) are symmetrically distributed on the cross cutter beam left and right, the fixed end of the edge hob (A, B, C, D, E, F, G, H) is embedded into a reserved position in the cutter head (7) and fixed, and a cutter body structure of the working end of the edge hob (A, B, C, D, E, F, G, H) and the plane where the cutter head (7) is located keep a certain inclination angle;
the hob protective frame device comprises a hob box (3) and a protective frame (4);
edge hob (A, B, C, D, E, F, G, H) includes the cutter body structure of work end, and cutter ring (1), sword hub (2), arbor (5) three make up the cutter body structure of edge hob (A, B, C, D, E, F, G, H), wherein: the cutter ring (1) and the cutter hub (2) are arranged on the cutter shaft (5), the cutter ring (1) is arranged on the cutter hub (2), and the cutter hub (2) is arranged on the cutter shaft (5); the cutter body structure of the edge hob (A, B, C, D, E, F, G, H) is arranged in the cutter box (3), and the cutter box (3) is arranged on the cutter head (7).
In the operation process of the shield tunneling machine, the cutter head (7) integrally rotates under the action of an external driving device, so that a cutter body structure of the edge hob (A, B, C, D, E, F, G, H) is driven to rotate around the center of the cutter head (7), and the cutter head (7) moves towards the direction of a shield tunneling surface under the action of the thrust force of the shield tunneling machine, so that the cutter ring (1) crushes and excavates a section rock (soil) body, and further the excavation work of the tunnel surface is completed;
as shown in fig. 3 and 4:
the hob protective frame (4) is symmetrically arranged around the cutter box (3) in the axial direction of the cutter shaft (5) and the radial direction of the cutter ring (1); the hob protective frame (4) is fixedly welded on the upper part of the hob box (3) by adopting an oxyacetylene flame surfacing welding process; the hob protection frame (4) avoids the edge hob from falling off due to rock impact, and can replace the cutter ring (1) to be worn to a certain extent when the serious eccentric wear of the cutter occurs, and meanwhile, the hob hub (2) can be protected from being damaged.
The section shapes of the hob protective frames (4) are distributed in a trapezoidal shape, a first side surface (4-1) of each hob protective frame (4) is perpendicular to the corresponding hob box (3), a second side surface (4-2) of each hob protective frame (4) forms a certain included angle with the corresponding hob box (3), and the included angle is within the range of 30-45 degrees, so that gravel soil can automatically drop, and the excavation of the hob body is not affected.
The height of protective frame (4) should be greater than the distance of hobbing cutter sword hub (2) outward flange apart from toolbox (3) top to be less than the distance at hobbing cutter sword circle (1) to toolbox (3) top and the theoretical penetration difference of hobbing cutter, and satisfy certain factor of safety, in order to guarantee that the hobbing cutter can normal use, this engineering is got the hobbing cutter protective frame height and is 133 mm.
The top of the hob protective frame (4) is provided with a wear-resistant layer (6) which is arranged in a strip-shaped wear-resistant grid mode, and a high-chromium cast iron material is deposited on the hob protective frame (4) so as to improve the wear resistance of the protective frame (4).
Claims (4)
1. A shield tunneling machine cutter head with a hob protection frame device and suitable for boulder strata comprises a cross cutter beam, and is characterized by also comprising a plurality of edge hobs and a plurality of hob protection frame devices;
the number of the edge hob and the hob protective frame devices is the same;
the cross-shaped knife beam is arranged on the cutter head (7);
edge hobs (A, B, C, D, E, F, G, H) are symmetrically distributed on the cross cutter beam left and right, the fixed end of the edge hob (A, B, C, D, E, F, G, H) is embedded into a reserved position in the cutter head (7) and fixed, and a cutter body structure of the working end of the edge hob (A, B, C, D, E, F, G, H) and the plane where the cutter head (7) is located keep a certain inclination angle;
the hob protective frame device comprises a hob box (3) and a protective frame (4);
edge hob (A, B, C, D, E, F, G, H) includes the cutter body structure of work end, and cutter ring (1), sword hub (2), arbor (5) three make up the cutter body structure of edge hob (A, B, C, D, E, F, G, H), wherein: the cutter ring (1) and the cutter hub (2) are arranged on the cutter shaft (5), the cutter ring (1) is arranged on the cutter hub (2), and the cutter hub (2) is arranged on the cutter shaft (5); the cutter body structure of the edge hob (A, B, C, D, E, F, G, H) is arranged in the cutter box (3), and the cutter box (3) is arranged on the cutter head (7);
the protective frame (4) is arranged along the periphery of the knife box (3) and is axially and radially symmetrical with the knife ring (1) about the knife shaft (5), and is fixedly welded on the upper part of the knife box (3).
2. The shield tunneling machine cutterhead with a hob protection frame device suitable for boulder strata according to claim 1, wherein the cross-sectional shape of the protection frame (4) is distributed in a trapezoid shape, the outer side surface (4-1) of the protection frame is perpendicular to the cutter box (3), and the inner side surface (4-2) of the protection frame forms a certain included angle with the cutter box (3), and the included angle is within a range of 30-45 degrees.
3. The shield tunneling machine cutterhead with a hob protection frame device suitable for boulder strata according to claim 1, wherein the height of the protection frame (4) should be greater than the distance from the outer edge of the hob hub (2) to the top of the hob box (3), less than the difference between the distance from the hob ring (1) to the top of the hob box (3) and the theoretical penetration of the hob tools, and satisfy the safety factor.
4. The shield tunneling machine cutterhead with a hob protection frame device suitable for boulder strata according to claim 1, wherein a wear-resistant layer (6) is arranged on the top of the protection frame (4); the high-chromium cast iron material is arranged on the protective frame (4) in the form of strip-shaped wear-resistant grids in a cladding mode to form a wear-resistant layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120945583.0U CN217421185U (en) | 2021-05-06 | 2021-05-06 | Shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120945583.0U CN217421185U (en) | 2021-05-06 | 2021-05-06 | Shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217421185U true CN217421185U (en) | 2022-09-13 |
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ID=83169599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120945583.0U Active CN217421185U (en) | 2021-05-06 | 2021-05-06 | Shield constructs quick-witted blade disc suitable for boulder stratum with hobbing cutter guard frame device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217421185U (en) |
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2021
- 2021-05-06 CN CN202120945583.0U patent/CN217421185U/en active Active
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