CN114893194A - Round platform shape radials formula shield constructs blade disc - Google Patents
Round platform shape radials formula shield constructs blade disc Download PDFInfo
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- CN114893194A CN114893194A CN202210514410.2A CN202210514410A CN114893194A CN 114893194 A CN114893194 A CN 114893194A CN 202210514410 A CN202210514410 A CN 202210514410A CN 114893194 A CN114893194 A CN 114893194A
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- truncated cone
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- circular
- cutter
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- 230000005641 tunneling Effects 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000002689 soil Substances 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 13
- 210000001624 hip Anatomy 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A truncated cone-shaped spoke plate type shield cutter head is characterized in that a cutter head main body is truncated cone-shaped, an annular cross beam, a plurality of spokes and a plurality of small panels are arranged on the cutter head main body, a truncated cone small table top and a truncated cone side face are arranged on the cutter head main body, a plurality of cutters, a preceding cutter and a scraper are arranged on the truncated cone small table top and the truncated cone side face, a plurality of high-pressure water spray nozzles are arranged on the cutter head main body, one end of each small panel is connected with the edge of a truncated cone large table top, a central fishtail cutter is arranged on the truncated cone small table top, and small panel openings are arranged on the small panels; the spokes are composed of round platform small platform surface spokes and round platform side surface spokes, the round platform small platform surface spokes are arranged on the round platform small platform surface, and the round platform side surface spokes are arranged on the round platform side surface. The side projection of the cutter head main body is isosceles trapezoid, so that the friction resistance can be effectively reduced, the tunneling thrust can be reduced, the tunneling efficiency can be improved, the circular truncated cone small table-board of the cutter head main body is plane circular, the water and soil pressure balance can be favorably controlled, the tunneling stability can be improved, and the cutter head main body is applied to the technical field of tunnel engineering and mechanical equipment.
Description
Technical Field
The invention relates to a truncated cone-shaped radial shield cutter head in the technical field of tunnel engineering and mechanical equipment.
Background
The development of China is rapid, with the increasing of urban population, the construction of infrastructure is continuously strengthened, most cities begin to develop and utilize underground space, the shield tunneling machine has more and more obvious effect in the aspect, and the shield tunneling machine is widely applied to tunnel projects such as subways, municipal works, railways and highways. The shield machine has a complex structure and more systems, and is a highly mechanized and automatic tunneling and lining complete equipment which integrates the technologies of mechanical, electrical, material, information, hydraulic, laser, control and the like by adopting a shield method. At present, most shield machines adopt a plane cutter head structure, and the structure is simple and can meet most tunneling requirements, so that the shield machine is widely applied. The shield machine cutter head has the functions of tunneling and excavating soil bodies and stabilizing working faces, in order to meet the excavation requirements of different projects and improve the tunneling efficiency, the special-shaped cutter head is designed and applied, wherein the conical cutter head with the cone apex angle of 90 degrees can reduce the friction resistance compared with a plane cutter head under the same condition, thereby reducing the tunneling thrust and further improving the tunneling efficiency. Therefore, in the design process of the special-shaped cutter head, the tunneling requirement is met, the tunneling efficiency is improved, and the tunneling safety and stability are ensured. Therefore, the development of a truncated cone shaped radial plate type shield cutter head is a new problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a circular truncated cone-shaped radial plate type shield cutter head, aiming at the defects and shortcomings of the prior art and the design requirement of the shield cutter head, the circular truncated cone-shaped radial plate type shield cutter head provided by the invention effectively improves the tunneling efficiency and ensures the tunneling stability.
The purpose of the invention is realized as follows: a truncated cone-shaped radial plate type shield cutter head comprises a cutter head main body, an annular cross beam, spokes, a small panel, a truncated cone small table top, a truncated cone side face, cutters, a preceding cutter, a scraper, a high-pressure water jet, a truncated cone large table top, a central fishtail cutter and a small panel opening, wherein the cutter head main body is in a truncated cone shape; the spokes consist of round table small table spokes and round table side spokes, the round table small table spokes are arranged on the round table small table, and the round table side spokes are arranged on the round table side; the cutter consists of a circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutter, circular truncated cone small table top other cutters and a circular truncated cone side starting cutter, the circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutter is arranged on a circular truncated cone small table top spoke, the circular truncated cone small table top other cutters are arranged between the two circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutters, and the circular truncated cone side starting cutter is arranged on a circular truncated cone side spoke; the scraper consists of a transverse edge scraper and a longitudinal edge scraper, one transverse edge scraper and two longitudinal edge scrapers are arranged on each small panel, and the transverse edge scraper is arranged between the two longitudinal edge scrapers;
the side surface of the circular truncated cone shape of the cutter head main body is an isosceles trapezoid, the length of the upper bottom of the isosceles trapezoid is half of the length of the lower bottom, the diameter of the small circular truncated cone table surface is half of the diameter of the large circular truncated cone table surface, the included angle between the upper bottom and the waist of the isosceles trapezoid on the side surface of the circular truncated cone shape of the cutter head main body is 135 degrees, the included angle between the lower bottom and the waist of the isosceles trapezoid on the side surface of the circular truncated cone shape of the cutter head main body is 45 degrees, and the included angle between the extension lines of the two waists is 90 degrees; the small table top of the circular table is in a plane circular shape, a plurality of spokes are arranged on the small table top of the circular table, the included angle between each spoke and each spoke is 60 degrees, a plurality of paired cutters and a plurality of leading cutters are arranged on the spokes, each leading cutter is arranged between each pair of cutters, the height of each leading cutter is greater than that of each cutter, and the width of each leading cutter is less than that of each cutter;
a central fishtail knife is arranged on the circular truncated cone small table top, and the central fishtail knife is coaxial with the cutter head main body; the maximum pole diameter of the cutter arrangement is the radius of the small table top of the circular truncated cone, the minimum pole diameter is the radius which does not interfere with the central fishtail cutter, the maximum pole diameter and the minimum pole diameter on each spoke are respectively provided with a cutter, the rest cutters are positioned between the two cutters, and the maximum pole diameter and the minimum pole diameter are respectively arranged on a plurality of spokes according to an equal difference number array, so that the contact ratio of the cutters for cutting soil is ensured; the central fishtail knife, the cutter and the advanced knife on the small table-board of the circular table are firstly contacted with the soil body;
a plurality of spokes and a plurality of small panels are arranged on the side surface of the circular truncated cone; the included angle between the spokes on the side surface of the circular truncated cone is 60 degrees, the included angle between the small panels is 60 degrees, one end of each small panel is connected with the edge of the large circular truncated cone surface of the cutter head main body, and the other end of each small panel is connected with the annular cross beam; a scraper and a high-pressure water jet are arranged on the small panel;
the spokes on the side surface of the circular table and the spokes on the small table surface of the circular table are integrated, and the cutters arranged on the spokes on the side surface of the circular table are arranged anticlockwise according to four Archimedes spiral lines, so that the service life principles of full-section cutting, cutter abrasion and the like of the cutter head are ensured; the arrangement of the initial cutters on the spokes on the side surface of the circular truncated cone does not interfere with the arrangement of the maximum-pole-diameter cutters on the small table surface of the circular truncated cone; the connecting line of the tool nose of the cutter arranged on the spoke on the side surface of the circular truncated cone is a straight line and is parallel to the side surface of the spoke;
each small panel is provided with a transverse edge scraper and two longitudinal edge scrapers, the transverse edge scrapers are arranged between the two longitudinal edge scrapers, and the height and the width of each transverse edge scraper are both larger than those of each longitudinal edge scraper; each small panel is provided with a small panel opening, the projection of the small panel opening is an isosceles trapezoid ring, and the size of the small panel opening outside the cutter head is larger than that of the small panel opening inside the cutter head, so that the muck can conveniently flow into the soil bin; two groups of high-pressure water spray nozzles are arranged on each small panel to play roles in flushing the cutter head and assisting in breaking the ground; each group of high-pressure water spraying openings is provided with a plurality of high-pressure water spraying openings, and the high-pressure water spraying openings are arranged on two sides of the opening; the circle center connecting line of each group of the high-pressure water spray nozzles is a straight line and is parallel to the side surface of the small panel;
the cutter head main body is provided with a central fishtail cutter, a plurality of pairs of cutters, a plurality of leading cutters, a plurality of transverse edge scrapers, a plurality of longitudinal edge scrapers and a plurality of high-pressure water nozzles; the small circular truncated cone table surface and the side surface of the circular truncated cone-shaped spoke plate type shield cutter head are water and soil pressure balance surfaces;
the working principle of the circular truncated cone-shaped radial plate type shield cutter head is that the circular truncated cone-shaped radial plate type shield cutter head can effectively improve the tunneling efficiency and ensure the tunneling stability; when the cutter head is designed to be conical, the envelope line of a cutter head cutter is conical, the side projection is triangular, when the diameter of the cutter head is the same as the tunneling condition, compared with a plane circular cutter head, a certain friction force can be reduced in the tunneling process, the forward thrust is reduced, the thrust of the cutter head is reduced, the rotating friction resistance moment of the cutter head is inevitably reduced, the driving moment of the cutter head is reduced, the tunneling efficiency can be improved, when the cone vertex angle of the cutter head is 90 degrees, the side projection is isosceles right triangle, the thrust reduction relative quantity is maximum, and the effect of improving the tunneling efficiency is the best; in order to better control the water and soil pressure balance, a conical cutter head is changed into a circular truncated cone-shaped cutter head, the envelope curve of a cutter head cutter is in a circular truncated cone shape, the side projection is in an isosceles trapezoid shape, the included angle between the lower bottom and the waist is 45 degrees, the included angle between the upper bottom and the waist is 135 degrees, the diameter of the small circular table top is half of that of the large circular table top, the small circular table top is in a plane circle shape and is directly contacted with the soil body, and the small circular table top is the same as the working surface of the plane circle cutter head.
The key point of the invention lies in its structure and working principle.
Compared with the prior art, the round platform-shaped radial plate type shield cutter head has the advantages that:
(1) the projection of the side surface of the truncated cone-shaped radial plate type shield cutter head is isosceles trapezoid, and the included angle between two extended lines is 90 degrees, so that the friction resistance can be effectively reduced, the tunneling thrust can be reduced, and the tunneling efficiency can be improved;
(2) the small table-board of the circular table of the cutter head main body is in a plane circular shape, so that the water and soil pressure balance can be controlled, and the tunneling stability can be improved; the cutter is arranged on the cutter head main body, the surface area of the cutter is large, and the cutters, the leading cutter, the central fishtail cutter, the transverse edge scraper and the longitudinal edge scraper are arranged, wherein the cutters on the side face of the cutter head main body are arranged anticlockwise according to a plurality of Archimedes spiral lines, so that the service life principles of full-section cutting, cutter abrasion and the like of the cutter head are met;
(3) the cutter head main body comprises a plurality of high-pressure water spray nozzles, and the functions of flushing the cutter head, assisting in breaking soil and cooling the digging cutter are achieved;
the method can be widely applied to the technical fields of tunnel engineering and mechanical equipment.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a left side view of fig. 2.
FIG. 4 is a schematic structural view of the truncated cone small table portion of the present invention.
Fig. 5 is a first perspective view of the truncated cone side and small panel portions of the present invention.
FIG. 6 is a second perspective view of the side and facet portions of the truncated cone of the present invention.
FIG. 7 is a perspective view of a spoke portion of the present invention.
Fig. 8 is a first operation principle diagram of the present invention.
Fig. 9 is a second working principle diagram of the present invention.
Detailed Description
Referring to the attached drawings, the circular truncated cone-shaped spoke plate type shield cutter head comprises a cutter head main body 1, an annular cross beam 2, spokes 3, a small panel 4, a circular truncated cone small table-board 5, a circular truncated cone side surface 6, a cutter 7, a leading cutter 8, a scraper 9, a high-pressure water jet 10, a circular truncated cone large table-board 11, a central fishtail cutter 12 and a small panel opening 13, wherein the cutter head main body 1 is in a circular truncated cone shape, an annular beam 2, a plurality of spokes 3 and a plurality of small panels 4 are arranged on a cutter head main body 1, a circular truncated cone small table-board 5 and a circular truncated cone side surface 6 are arranged on the cutter head main body 1, a plurality of cutters 7, a precedent cutter 8 and a scraper 9 are arranged on the small circular truncated cone table surface 5 and the side surface 6 of the circular truncated cone, a plurality of high-pressure water spray nozzles 10 are arranged on the cutter head main body 1, one end of a small panel 4 is connected with the edge of a circular truncated cone large table top 11, a central fishtail knife 12 is arranged on the circular truncated cone small table top 5, and a small panel opening 13 is arranged on the small panel 4; the spokes 3 consist of round table small table surface spokes 3-1 and round table side surface spokes 3-2, the round table small table surface spokes 3-1 are arranged on the round table small table surface 5, and the round table side surface spokes 3-2 are arranged on the round table side surface 6; the cutter 7 consists of a circular truncated cone small table top maximum pole diameter or minimum pole diameter cutter 7-1, circular truncated cone small table top other cutters 7-2 and a circular truncated cone side starting cutter 7-3, the circular truncated cone small table top maximum pole diameter or minimum pole diameter cutter 7-1 is arranged on a circular truncated cone small table top spoke 3-1, the circular truncated cone small table top other cutters 7-2 are arranged between the two circular truncated cone small table top maximum pole diameters or minimum pole diameter cutters 7-1, and the circular truncated cone side starting cutter 7-3 is arranged on a circular truncated cone side spoke 3-2; the scrapers 9 are composed of a transverse edge scraper 9-1 and a longitudinal edge scraper 9-2, one transverse edge scraper 9-1 and two longitudinal edge scrapers 9-2 are provided on each small panel 4, and the transverse edge scraper 9-1 is provided between the two longitudinal edge scrapers 9-2.
The side surface of the circular truncated cone shape of the cutter head main body 1 is an isosceles trapezoid, the length of the upper bottom of the isosceles trapezoid is half of the length of the lower bottom, the diameter of the circular truncated cone small table-board 5 is half of the diameter of the circular truncated cone large table-board 11, the included angle between the upper bottom of the isosceles trapezoid and the waist of the circular truncated cone shape side surface of the cutter head main body 1 is 135 degrees, the included angle between the lower bottom of the isosceles trapezoid and the waist of the circular truncated cone shape side surface of the cutter head main body 1 is 45 degrees, and the included angle between the extension lines of the two waists is 90 degrees; the small circular truncated cone table top 5 is circular, a plurality of spokes 3 are arranged on the small circular truncated cone table top 5, the included angle between each spoke 3 and each spoke 3 is 60 degrees, a plurality of paired cutters 7 and a plurality of advanced cutters 8 are arranged on the spokes 3, the advanced cutters 8 are arranged between each pair of cutters 7, the heights of the advanced cutters 8 are larger than the heights of the cutters 7, and the widths of the advanced cutters 8 are smaller than the widths of the cutters 7.
A central fishtail knife 12 is arranged on the circular truncated cone small table-board 5, and the central fishtail knife 12 is coaxial with the cutter head main body 1; the maximum pole diameter of the cutters 7 is the radius of the circular truncated cone small table top 5, the minimum pole diameter is the radius which does not interfere with the central fishtail cutter 12, the maximum pole diameter and the minimum pole diameter of each spoke 3 are respectively provided with one cutter 7, the rest cutters 7 are positioned between the two cutters 7, and the cutters 7 are respectively arranged on the spokes 3 according to the equal difference number by the distance between the maximum pole diameter and the minimum pole diameter, so that the contact ratio of the cutters 7 to cut soil is ensured; the central fishtail knife 12, the cutter 7 and the advanced knife 8 on the circular truncated cone small table top 5 are firstly contacted with the soil body.
A plurality of spokes 3 and a plurality of small panels 4 are arranged on the side surface 6 of the circular truncated cone; the included angle between the spokes 3 and 2 on the side surface of the circular truncated cone is 60 degrees, the included angle between the small panels 4 is 60 degrees, one end of each small panel 4 is connected with the edge of the large circular truncated cone table 11 of the cutter head main body 1, and the other end of each small panel 4 is connected with the annular beam 2; the small panel 4 is provided with a blade 9 and a high-pressure water jet 10.
The spokes 3 on the circular truncated cone side surface 6 and the spokes 3 on the circular truncated cone small table surface 5 are integrated, and the cutters 7 arranged on the spokes 3 on the circular truncated cone side surface 6 are arranged anticlockwise according to four Archimedes spiral lines, so that the service life principles of full-section cutting, cutter abrasion and the like of a cutter head are ensured; the arrangement of the starting cutters 7 on the spokes 3 of the circular truncated cone side surface 6 does not interfere with the arrangement of the maximum-pole-diameter cutters 7 on the circular truncated cone small table surface 5; the connecting line of the tool tips of the cutters 7 arranged on the spokes 3 of the circular truncated cone side surface 6 is a straight line and is parallel to the side surfaces of the spokes 3.
A transverse edge scraper 9-1 and two longitudinal edge scrapers 9-2 are arranged on each small panel 4, the transverse edge scraper 9-1 is arranged between the two longitudinal edge scrapers 9-2, and the height and the width of the transverse edge scraper 9-1 are both larger than those of the longitudinal edge scrapers 9-2; each small panel 4 is provided with a small panel opening 13, the projection of the small panel opening 13 is an isosceles trapezoid ring, and the size of the small panel opening 13 on the outer side of the cutter head is larger than that of the inner side of the cutter head, so that the muck can conveniently flow into the soil bin; two groups of high-pressure water spray nozzles 10 are arranged on each small panel 4, so that the functions of flushing the cutter head and assisting in breaking the ground are achieved; each group of high-pressure water spray nozzles 10 is provided with a plurality of high-pressure water spray nozzles, and the high-pressure water spray nozzles 10 are arranged on two sides of the opening; the circle center connecting line of each group of the plurality of high-pressure water spray nozzles 10 is a straight line and is parallel to the side surface of the small panel 4.
The cutter head main body 1 is provided with a central fishtail cutter 12, a plurality of pairs of cutters 7, a plurality of leading cutters 8, a plurality of transverse edge scrapers 9, a plurality of longitudinal edge scrapers 9 and a plurality of high-pressure water nozzles 10; the small circular truncated cone table surface 5 and the side surface 6 of the circular truncated cone type spoke plate type shield cutter head are water and soil pressure balance surfaces.
The working principle of the circular truncated cone-shaped radial plate type shield cutter head is that the circular truncated cone-shaped radial plate type shield cutter head can effectively improve the tunneling efficiency and ensure the tunneling stability; when the cutter head is designed to be conical, the envelope line of a cutter head cutter is conical, the side projection is triangular, when the diameter of the cutter head is the same as the tunneling condition, compared with a plane circular cutter head, a certain friction force can be reduced in the tunneling process, the forward thrust is reduced, the thrust of the cutter head is reduced, the rotating friction resistance moment of the cutter head is inevitably reduced, the driving moment of the cutter head is reduced, the tunneling efficiency can be improved, when the cone vertex angle of the cutter head is 90 degrees, the side projection is isosceles right triangle, the thrust reduction relative quantity is maximum, and the effect of improving the tunneling efficiency is the best; in order to better control the water and soil pressure balance, a conical cutter head is changed into a circular truncated cone cutter head, the envelope line of a cutter head cutter is in a circular truncated cone shape, the side projection is in an isosceles trapezoid shape, the included angle between the lower bottom and the waist is 45 degrees, the included angle between the upper bottom and the waist is 135 degrees, the diameter of the small circular table top is half of that of the large circular table top, and the small circular table top is in a plane circle shape and is directly contacted with the soil body like the working surface of the plane circular cutter head.
In fig. 8, a represents the reduced thrust cutter envelope; b represents a soil body. C in fig. 9 represents a cutter envelope of a cutter head that reduces thrust and ensures stability; b represents a soil body.
Claims (8)
1. The utility model provides a circular platform shape radials formula shield constructs blade disc, includes blade disc main part, annular beam, spoke, little panel, the little mesa of circular platform, circular platform side, cutter, sword, scraper, high pressure water jet, the big mesa of circular platform, central fishtail sword, little panel opening in advance, its characterized in that: the cutter head main body is in a circular table shape, an annular cross beam, a plurality of spokes and a plurality of small panels are arranged on the cutter head main body, a circular table small table top and a circular table side face are arranged on the cutter head main body, a plurality of cutters, a plurality of advanced cutters and scrapers are arranged on the circular table small table top and the circular table side face, a plurality of high-pressure water spray nozzles are arranged on the cutter head main body, one end of each small panel is connected with the edge of a circular table large table top, a central fishtail cutter is arranged on the circular table small table top, and a small panel opening is arranged on each small panel; the spokes consist of circular table small table surface spokes and circular table side surface spokes, the circular table small table surface spokes are arranged on the circular table small table surface, and the circular table side surface spokes are arranged on the circular table side surfaces; the cutter consists of a circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutter, circular truncated cone small table top other cutters and a circular truncated cone side starting cutter, the circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutter is arranged on a circular truncated cone small table top spoke, the circular truncated cone small table top other cutters are arranged between the two circular truncated cone small table top maximum electrode diameter or minimum electrode diameter cutters, and the circular truncated cone side starting cutter is arranged on a circular truncated cone side spoke; the scraper consists of a transverse edge scraper and a longitudinal edge scraper, wherein one transverse edge scraper and two longitudinal edge scrapers are arranged on each small panel, and the transverse edge scraper is arranged between the two longitudinal edge scrapers.
2. The truncated cone shaped web shield cutterhead according to claim 1, wherein: the side surface of the circular truncated cone shape of the cutter head main body is an isosceles trapezoid, the length of the upper bottom of the isosceles trapezoid is half of the length of the lower bottom, the diameter of the small circular truncated cone table surface is half of the diameter of the large circular truncated cone table surface, the included angle between the upper bottom and the waist of the isosceles trapezoid on the side surface of the circular truncated cone shape of the cutter head main body is 135 degrees, the included angle between the lower bottom and the waist of the isosceles trapezoid on the side surface of the circular truncated cone shape of the cutter head main body is 45 degrees, and the included angle between the extension lines of the two waists is 90 degrees; the small circular truncated cone table top is circular, a plurality of spokes are arranged on the small circular truncated cone table top, included angles between the spokes and the spokes are 60 degrees, a plurality of paired cutters and a plurality of leading cutters are arranged on the spokes, the leading cutters are arranged between each pair of cutters, the height of the leading cutters is larger than that of the cutters, and the width of the leading cutters is smaller than that of the cutters.
3. The truncated cone shaped web shield cutterhead according to claim 1, wherein: a central fishtail knife is arranged on the circular truncated cone small table top, and the central fishtail knife is coaxial with the cutter head main body; the maximum pole diameter of the cutter arrangement is the radius of the small table top of the circular truncated cone, the minimum pole diameter is the radius which does not interfere with the central fishtail cutter, the maximum pole diameter and the minimum pole diameter on each spoke are respectively provided with a cutter, the rest cutters are positioned between the two cutters, and the maximum pole diameter and the minimum pole diameter are respectively arranged on a plurality of spokes according to an equal difference number array, so that the contact ratio of the cutters for cutting soil is ensured; the central fishtail knife, the cutter and the advanced knife on the small table top of the circular table are firstly contacted with the soil body.
4. The truncated cone shaped web shield cutterhead according to claim 1, wherein: a plurality of spokes and a plurality of small panels are arranged on the side surface of the circular truncated cone; the included angle between the spokes on the side surface of the circular truncated cone is 60 degrees, the included angle between the small panels is 60 degrees, one end of each small panel is connected with the edge of the large circular truncated cone surface of the cutter head main body, and the other end of each small panel is connected with the annular cross beam; the small panel is provided with a scraper and a high-pressure water jet.
5. The truncated cone shaped web shield cutterhead according to claim 1, wherein: the spokes on the side surface of the circular table and the spokes on the small table surface of the circular table are integrated, and the cutters arranged on the spokes on the side surface of the circular table are arranged anticlockwise according to four Archimedes spiral lines, so that the service life principles of full-section cutting, cutter abrasion and the like of the cutter head are ensured; the arrangement of the initial cutters on the spokes on the side surface of the circular truncated cone does not interfere with the arrangement of the maximum-pole-diameter cutters on the small table surface of the circular truncated cone; the connecting line of the tool nose of the cutter arranged on the spoke on the side surface of the circular truncated cone is a straight line and is parallel to the side surface of the spoke.
6. The truncated cone shaped web shield cutterhead according to claim 1, wherein: each small panel is provided with a transverse edge scraper and two longitudinal edge scrapers, the transverse edge scrapers are arranged between the two longitudinal edge scrapers, and the height and the width of each transverse edge scraper are both larger than those of each longitudinal edge scraper; each small panel is provided with a small panel opening, the projection of the small panel opening is an isosceles trapezoid ring, and the size of the small panel opening outside the cutter head is larger than that of the small panel opening inside the cutter head, so that the muck can conveniently flow into the soil bin; two groups of high-pressure water spray nozzles are arranged on each small panel to play roles in flushing the cutter head and assisting in breaking the ground; each group of high-pressure water spraying openings is provided with a plurality of high-pressure water spraying openings, and the high-pressure water spraying openings are arranged on two sides of the opening; the circle center connecting line of each group of the high-pressure water spray nozzles is a straight line and is parallel to the side surface of the small panel.
7. The truncated cone shaped web shield cutterhead according to claim 1, wherein: the cutter head main body is provided with a central fishtail cutter, a plurality of pairs of cutters, a plurality of leading cutters, a plurality of transverse edge scrapers, a plurality of longitudinal edge scrapers and a plurality of high-pressure water nozzles; the small circular truncated cone table surface and the side surface of the circular truncated cone-shaped spoke plate type shield cutter head are water and soil pressure balance surfaces.
8. The truncated cone shaped web shield cutterhead according to claim 1, wherein: the working principle of the circular truncated cone-shaped radial plate type shield cutter head is that the circular truncated cone-shaped radial plate type shield cutter head can effectively improve the tunneling efficiency and ensure the tunneling stability; when the cutter head is designed to be conical, the envelope line of a cutter head cutter is conical, the side projection is triangular, when the diameter of the cutter head is the same as the tunneling condition, compared with a plane circular cutter head, a certain friction force can be reduced in the tunneling process, the forward thrust is reduced, the thrust of the cutter head is reduced, the rotating friction resistance moment of the cutter head is inevitably reduced, the driving moment of the cutter head is reduced, the tunneling efficiency can be improved, when the cone vertex angle of the cutter head is 90 degrees, the side projection is isosceles right triangle, the thrust reduction relative quantity is maximum, and the effect of improving the tunneling efficiency is the best; in order to better control the water and soil pressure balance, a conical cutter head is changed into a circular truncated cone-shaped cutter head, the envelope curve of a cutter head cutter is in a circular truncated cone shape, the side projection is in an isosceles trapezoid shape, the included angle between the lower bottom and the waist is 45 degrees, the included angle between the upper bottom and the waist is 135 degrees, the diameter of the small circular table top is half of that of the large circular table top, the small circular table top is in a plane circle shape and is directly contacted with the soil body, and the small circular table top is the same as the working surface of the plane circle cutter head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514410.2A CN114893194A (en) | 2022-05-12 | 2022-05-12 | Round platform shape radials formula shield constructs blade disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514410.2A CN114893194A (en) | 2022-05-12 | 2022-05-12 | Round platform shape radials formula shield constructs blade disc |
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| Publication Number | Publication Date |
|---|---|
| CN114893194A true CN114893194A (en) | 2022-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115199290A (en) * | 2022-09-14 | 2022-10-18 | 中交投资南京有限公司 | Tunnel excavation equipment and excavation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199290A (en) * | 2022-09-14 | 2022-10-18 | 中交投资南京有限公司 | Tunnel excavation equipment and excavation method |
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