CN113250697B - Telescopic shaft tunnelling machine cutter head - Google Patents
Telescopic shaft tunnelling machine cutter head Download PDFInfo
- Publication number
- CN113250697B CN113250697B CN202110639655.3A CN202110639655A CN113250697B CN 113250697 B CN113250697 B CN 113250697B CN 202110639655 A CN202110639655 A CN 202110639655A CN 113250697 B CN113250697 B CN 113250697B
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- 210000000078 claw Anatomy 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 9
- 238000009412 basement excavation Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
- E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical 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
The invention provides a telescopic cutter head of a shaft boring machine, which comprises a central cutter head body, a limiting amplitude arm, a movable amplitude arm, a fastening assembly and a driving assembly, wherein the central cutter head body is provided with a plurality of limiting amplitude arms; the central cutter head body is used for being connected with a main drive of the development machine; the limiting arm is provided with a plurality of limiting arms arranged along the circumferential direction of the central cutter head body; the number of the movable amplitude arms is equal to that of the limiting amplitude arms and the movable amplitude arms are arranged in a one-to-one correspondence manner; the driving component is used for driving the movable spoke arm to extend or retract relative to the limiting spoke arm; the fastening component is sleeved on the driving component and used for fixing the movable spoke arm in an extending state through matching with the limiting spoke arm. The cutter head of the telescopic shaft heading machine is novel in structural design, the tunneling and excavating functions of a full-face shaft can be realized, and the problem that the cutter head of the shaft is difficult to recover when the inner diameter of the shaft is reduced after the shaft is supported or segments are assembled can be solved, so that the disassembly construction difficulty of the cutter head is reduced, and the economy and the personnel safety are improved.
Description
Technical Field
The invention relates to the technical field of development machines, in particular to a cutter head structure for a full-face shaft development machine.
Background
The shaft heading machine is widely applied to shaft construction engineering due to the characteristics of safety and high efficiency, and a shaft cutter head is key equipment for carrying out full-face excavation on the bottom surface of a shaft. When a shaft heading machine is used for shaft construction, a shaft wall needs to be supported along with continuous penetration of shaft excavation, and the inner diameter of the shaft wall after supporting is smaller than the diameter of a cutter head, so that the cutter head of the shaft cannot be integrally lifted to the ground from the shaft after the shaft excavation of the shaft is finished. The existing method is to design the cutter head into a multi-edge block structure, and bolt each edge block through bolts to assemble an integral cutter head; when the machine is disassembled, a worker enters the well bottom to disassemble the cutter head and then lifts out in blocks. However, the constructors directly enter the cutter head soil bin at the bottom of the well for operation, the safety of the constructors is difficult to guarantee, and the block disassembly and assembly have great influence on the whole construction progress.
Therefore, in the construction of the vertical shaft, under the condition that a shaft wall support is needed, if the cutter head is ensured to be recovered smoothly, the problems of shortening the dismantling period and improving the safety of constructors become to be solved urgently at present.
Patent CN107339112A discloses a cutter head device of a full-section heading machine with a variable cutting diameter, which comprises a cutter head body, a rotary table, an expansion part, a telescopic oil cylinder, a connecting rod, a cutting pick, an oil cylinder displacement sensor and a rotary table angle sensor. The working principle is that the expansion part slides on a slide way of the cutter head body, and the oil cylinder is used for pushing the turntable to rotate; the turntable pushes the connecting rod to move and is used for realizing synchronous extension and retraction of the expansion part; the excavation diameter of the cutterhead can be accurately calculated by measuring the displacement of the oil cylinder and the rotating angle of the rotary table, so that the excavation diameter change of the cutterhead can be controlled by controlling the expansion and contraction of the oil cylinder. The method can realize the change of the excavation diameter of the cutter head in any numerical value within the design range, but the expansion part and the turntable lack fastening measures, the stability of the whole structure of the cutter head is poor, and the structural failure rate is high; and when the cutter head is in a stretching tunneling state, the oil cylinder must be always in a maximum pressure working state, and the requirement on the whole hydraulic circuit of the cutter head is higher.
Patent CN107524450A discloses a radially telescopic cutter head and a rectangular shield machine using the same, which comprises a cutter head seat, wherein a fixed amplitude arm is arranged on the cutter head seat, a telescopic amplitude arm and a telescopic driving mechanism are arranged in a cylinder body of the fixed amplitude arm, and the telescopic driving mechanism is used for driving the telescopic amplitude arm to extend and retract in the fixed amplitude arm; the outer surface of the fixed spoke arm is provided with a fixed cutter head, and the telescopic spoke arm is provided with a telescopic cutter head. The cutter head capable of radially extending and retracting is used for excavating blind areas through the radial extension and retraction of the telescopic boom, the telescopic boom extends out according to the range of the blind areas, the blind areas are accurately excavated, and the non-blind-area full-section excavation of rectangular sections is realized. The invention effectively solves the problem of dead zone excavation during the construction of the rectangular shield tunnel, but the problem of relative rotation can occur during the construction because the fixed amplitude arm and the telescopic amplitude arm lack a relative fixing measure, and when the telescopic cutter bit breaks rock, the radial force can be directly born by the oil cylinder, and the oil cylinder must be always in the maximum pressure working state. Therefore, the problems of rotation and poor stability of the cantilever can be caused during practical construction, and the method related to the invention has extremely low efficiency when the method is used for diameter expanding excavation of the cutterhead.
Patent CN112253127A discloses a scalable blade disc structure of shaft entry driving machine full face, specifically is a scalable blade disc structure of shaft entry driving machine full face, includes: the cutter head body, the swing arm and the power unit are respectively provided with a cutter at the lower parts of the cutter head body and the swing arm for drilling of the tunneling machine; the plurality of swing arms are arranged on the periphery of the cutter head body, each swing arm is connected with the power unit through the link mechanism, and the power unit drives the link mechanism to rotate so as to enable the swing arms to do telescopic motion on the periphery of the cutter head body; the power output end of the power unit is provided with a sensor for sensing the motion of the power unit so as to realize synchronous motion of a plurality of swing arms on the periphery of the cutter head body. The cutter head body and the swing arm form an integral full-section cutter head structure, the swing arm is connected with the cutter head body through a connecting rod mechanism, the other end of the connecting rod mechanism is connected with a power unit, and the power unit stretches to drive the swing arm to act, so that the cutter head can be stretched. However, when the cutterhead is tunneled in a full-face mode, the swing arm not only needs to bear the reverse force of the rock face, but also can bear strong vibration, and therefore the cutterhead adopting the form of the oil cylinder and the connecting rod mechanism is poor in overall stability and high in failure rate. And when the cutter head is in a stretching tunneling state, the oil cylinder must be always in a maximum pressure working state, and the requirement on the whole hydraulic circuit of the cutter head is higher.
Disclosure of Invention
The invention aims to provide a telescopic cutter head of a shaft heading machine aiming at the defects of the prior art.
In order to achieve the aim, the invention provides a telescopic vertical shaft heading machine cutter head, which comprises a central cutter head body, a limiting amplitude arm, a movable amplitude arm, a fastening assembly and a driving assembly, wherein the central cutter head body is provided with a plurality of limiting amplitude arms; the central cutter head body is arranged in the middle of the cutter head and is used for being connected with a main drive of the tunneling machine; the limiting arm is of a hollow structure and is provided with a plurality of limiting arms arranged along the circumferential direction of the central cutter head body, one end of each limiting arm is connected with the central cutter head body, and the other end of each limiting arm extends towards the outer side of the cutter head; the number of the movable spoke arms is equal to that of the limiting spoke arms and the movable spoke arms are arranged in a one-to-one correspondence manner, and the single movable spoke arm is arranged in the corresponding limiting spoke arm; one end of the driving component is connected with the central cutter head body, and the other end of the driving component is connected with the single movable amplitude arm and is used for driving the movable amplitude arm to extend or retract relative to the limiting amplitude arm; the fastening component is sleeved on the driving component and used for fixing the movable spoke arm in an extending state through matching with the limiting spoke arm.
Preferably, the driving assembly comprises a driving piece and a support; one end of the driving piece is connected with the central cutter head body, and the other end of the driving piece is provided with a support; the support is connected with the movable spoke arm so as to drive the movable spoke arm to extend or retract relative to the limiting spoke arm.
Preferably, the fastening assembly comprises an elastic piece, a base and a claw; the elastic piece is sleeved on the driving piece; the base is sleeved on the driving piece and connected with the elastic piece, and the clamping jaw is arranged on the base; one end of the movable spoke arm close to the limiting spoke arm is provided with a limiting groove matched with the clamping jaw, and the clamping jaw moves into the limiting groove and is clamped under the action of the elastic piece, so that the movable spoke arm and the central cutter head are fixed in position.
Preferably, the jaw and the limit groove of the movable spoke arm adopt one or more of a conical surface structure, a tooth-shaped structure, a polygonal structure and a boss structure which are matched with each other.
Preferably, a torsion spring is further arranged between the base and the jaw, and the jaw is kept close to the inner wall surface of the fixed spoke arm through the tension force of the torsion spring.
Preferably, the central cutter head body comprises a central cylinder and a fixed spoke; the fixed amplitude arms are arranged along the circumferential direction of the central cylinder, the number of the fixed amplitude arms is equal to that of the limiting amplitude arms, and the fixed amplitude arms and the limiting amplitude arms are connected in a one-to-one correspondence manner in a manner of being fixedly connected by a common central line; one end of the single fixed arm is connected with the central cylinder, and the other end of the single fixed arm extends outwards.
Preferably, the central cutter head body further comprises flange support legs and a base, the base and the central cylinder are arranged in a coaxial mode, and the number of the flange support legs is at least one and is used for connecting the base and the fixed arm.
Preferably, the fixed spokes are all arranged in an inclined mode, and the included angle between the central axis of the fixed spokes and the central axis of the central cylinder is set to be 60-75 degrees.
Preferably, the limiting arm comprises a diameter-changing section with the inner diameter gradually reduced along the extending direction of the movable arm, and the outer diameter of the movable arm is matched with the inner diameter of the limiting arm.
And a sealing structure is arranged between the movable spoke arm and the fixed spoke arm in the central cutter head body.
Preferably, the fixed arm, the limiting arm and the movable arm are all provided with shell knives.
Preferably, the shell knives arranged on the fixed spoke arms and the limiting spoke arms are staggered with each other.
Preferably, the shell knives arranged on the movable spoke arms are arranged between the shell knives arranged on the fixed spoke arms and the shell knives arranged on the limiting spoke arms to form a structure which is arranged in a staggered mode.
Compared with the prior art, the invention has the following beneficial effects:
(1) the cutter head of the telescopic shaft heading machine is novel in structural design, the tunneling and excavating functions of a full-face shaft can be realized, and the problem that the cutter head of the shaft is difficult to recover when the inner diameter of the shaft is reduced after the shaft is supported or segments are assembled can be solved, so that the disassembly construction difficulty of the cutter head is reduced, and the economy and the personnel safety are improved.
(2) According to the invention, the cutter head is arranged into a plurality of detachable block structures, so that the hoisting, transportation and assembly are convenient, the manufacturing difficulty in a factory is greatly reduced, and meanwhile, the quick assembly and disassembly in a well can be realized.
(3) The automatic diameter reducing device has the advantages that through the characteristics of the structure, the function of automatically reducing the diameter in the cutter disc recovery process can be realized, and the structure is simple; and when the cutter head is in a tunneling state, the intervention of an electro-hydraulic system is not needed, and the structure stability is good and the reliability is high.
(4) According to the invention, the fastening structure for realizing locking and fixing between the movable amplitude arm and the driving assembly is set to be a structure completed by matching the limiting amplitude arm and the spring clamping jaw, so that the intervention of an electro-hydraulic system is not required, and the structure has good stability and high reliability.
(5) According to the invention, the torsion spring is arranged in the fastening structure, so that the clamping jaw can be wedged into the limiting groove more accurately; and when the movable amplitude arm retracts, the oil cylinder retracts to drive the movable amplitude arm to retract, and then the movable amplitude arm is driven to retract, so that the clamping problem which possibly occurs when the oil cylinder directly drives the movable amplitude arm to retract is effectively prevented.
(6) According to the invention, the fixed amplitude arm, the limiting amplitude arm and the movable amplitude arm are all in a structural form of double-row seamless steel tubes, so that the arrangement of front cutters is facilitated, and the movable amplitude arm can be effectively prevented from rotating when extending outwards.
(7) According to the invention, the cutters on the movable spoke arms, the fixed spoke arms and the limiting spoke arms are arranged in a staggered manner, so that when the movable spoke arms stretch, the position interference of the cutters can not be caused.
(8) According to the invention, the effective sealing device is arranged between the fixed boom and the movable boom, so that the damage and the structural blockage of parts caused by the fact that muck, sewage and the like enter the inner cavity of the fixed boom in the tunneling process can be avoided.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic front cross-sectional view of an example embodiment of the invention;
FIG. 3 is a schematic front sectional view of a limiting arm according to the present invention;
FIG. 4 is a schematic front sectional view of a movable horn of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 2 according to the present invention;
fig. 6 is a partially enlarged view of the invention at B in fig. 5.
Wherein:
1. the tool comprises a central cutter head body, 101, flange legs, 102, a central cylinder, 103, fixed web arms, 104, a base, 2, limiting web arms, 3, movable web arms, 4, a fastening assembly, 401, an elastic piece, 402, a base, 403, clamping jaws, 404, a torsion spring, 5, a driving assembly, 501, a driving piece, 502 and a support.
Detailed Description
In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the several references in this disclosure are not limited to the particular numbers in the examples of the figures; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.
The utility model discloses a:
referring to fig. 1, the retractable cutter head of the shaft boring machine provided by the invention comprises a central cutter head body 1, a limiting arm 2, a movable arm 3, a fastening assembly 4 and a driving assembly 5; the central cutter head body 1 is arranged in the middle of the cutter head and is used for being connected with a main drive of the tunneling machine; the limiting arm 2 is of a hollow structure and is provided with a plurality of limiting arms arranged along the circumferential direction of the central cutter head body 1, one end of each limiting arm 2 is connected with the central cutter head body 1, and the other end of each limiting arm extends towards the outer side of the cutter head; the number of the movable spoke arms 3 is equal to that of the limiting spoke arms 2 and the movable spoke arms 3 are arranged in a one-to-one correspondence manner, and the single movable spoke arm 3 is arranged in the corresponding limiting spoke arm 2; one end of the driving component 5 is connected with the central cutter head body 1, and the other end is connected with the single movable spoke arm 3 and is used for driving the movable spoke arm 3 to extend or retract relative to the limiting spoke arm 2; the fastening component 4 is sleeved on the driving component 5 and used for fixing the movable spoke arm 3 in an extending state through matching with the limiting spoke arm 2.
Referring to fig. 2 to 4, the central cutter head body 1 includes a base 104, flange legs 101, a central cylinder 102, and a fixed web 103; at least one flange supporting leg 101 is arranged, one end of the flange supporting leg is connected with the base 104, and the other end of the flange supporting leg is connected with the fixed arm 103; the fixed arm 103 is provided with at least one piece, and one end thereof is connected to the central cylinder 102 and the other end thereof is extended.
Preferably, the fixed spokes 103 are arranged obliquely, and the included angle between the central axis of the fixed spokes and the central axis of the central cylinder 102 is set to be 60-75 degrees.
Preferably, the limiting arm 2 is formed by welding double seamless steel tubes side by side, the inner diameter of one end of the limiting arm close to the fixed arm 103 is larger than that of the other end of the limiting arm far away from the fixed arm 103, and the middle end part of the limiting arm is in a conical surface structure transition and is used for installing the movable arm 3;
the movable spoke arm 3 is formed by welding double seamless steel pipes side by side, the outer diameter of one end close to the limiting spoke arm 2 is larger than that of the other end far away from the limiting spoke arm 2, and the middle end part of the movable spoke arm is of a hollow structure with a conical surface structure transition;
preferably, a sealing structure is arranged between the movable spoke arm 3 and the fixed spoke arm 103.
Preferably, the fixed arm 103, the limiting arm 2 and the movable arm 3 are all provided with shell knives; the shell knives arranged on the fixed arm 103 and the limiting arm 2 are staggered with each other; the shell knives arranged on the movable spoke arms 3 are arranged between the fixed spoke arms 103 and the shell knives arranged on the limiting spoke arms 2 to form a structure which is arranged in a staggered mode.
Preferably, the sealing structure is preferably configured as a sealing ring, a sealing strip or the like.
Referring to fig. 5, the driving assembly 5 includes a driving member 501 and a support 502, wherein both ends of the driving member 501 are respectively connected to the central cylinder 102 and the support 502, and the support 502 is installed in the through slot of the movable boom 3.
Preferably, the driving member 501 is preferably configured as a cylinder.
Referring to fig. 5 and 6, the fastening assembly 4 includes an elastic member 401, a base 402, and a jaw 403; the elastic part 401 is sleeved on the driving end of the driving component 5, the base 402 is sleeved on the driving end of the driving component 5, the clamping jaw 403 is installed on the base 402, and the driving end of the driving component 5 moves to drive the clamping jaw 403 to move into the limiting groove of the movable arm 3, so that the movable arm 3 is fastened.
Preferably, a torsion spring 404 is further provided between the base 402 and the claw 403, and the torsion spring 404 is used to keep the claw 403 in close contact with the inner wall surface of the fixed arm 103 at all times, thereby fixing the movable arm 3.
Preferably, the elastic member 401 is preferably provided in a spring structure.
Preferably, the jaw 403 and the limit groove of the movable spoke 3 adopt one or more of a conical surface structure, a tooth-shaped structure, a polygonal structure and a boss structure which are matched with each other.
Preferably, the principle of the fastening assembly 4 for realizing the fastening connection is as follows:
when the movable spoke arm 3 is in an extended state, the claw 403 is wedged into a limiting groove at the tail end of the movable spoke arm 3 under the action of the elastic piece 401, so that the movable spoke arm 3 is fixed; when the movable arm 3 exerts a counterforce on the jaw 403, the jaw 403 will turn outwards and further go deep into the limiting groove at the end of the movable arm 3 under the action of the elastic member 401, so that the movable arm 3 is more fastened.
The steps of the movable boom 3 changing from the retracted state to the extended state are as follows:
the driving piece 501 extends out to drive the support 502 to move towards the periphery of the cutter head until the support 502 is contacted with the baffle in the movable swing arm 3;
the driving piece 501 continues to extend to drive the movable arm 3 to move towards the periphery of the cutter head until the outer conical surface of the movable arm 3 contacts with the inner conical surface of the limiting arm 2, and at the moment, the movable arm 3 reaches the maximum extension amount and stops moving;
meanwhile, the claw 402 is wedged into a limit groove at the tail end of the movable spoke arm 3 under the action of the elastic piece 401, and plays a role in fixing the movable spoke arm 3;
at the moment, the driving part 501 releases the pressure, and the movable spoke arm 3 forms stable fit with the central cutter head body 1 under the dual actions of the limiting spoke arm 2 and the spring claw 4, so that the stability and the reliability of the whole mechanism in a cutter head tunneling state are ensured.
The movable spoke arm is changed from an extending state to a retracting state:
the driving piece 501 retracts to drive the support 502 to move towards the center direction of the cutter head until the support 502 is contacted with the inner base of the clamping jaw 402;
the driving piece 501 retracts continuously to overcome the acting force of the elastic piece 401, so that the claw 402 is separated from the limit groove at the tail end of the movable spoke arm 3;
the driving member 501 continues to retract until the support 502 contacts with the inner baffle of the movable arm 3, so as to drive the movable arm 3 to move towards the center of the cutter head, thereby completing the retraction process of the movable arm 3 and achieving the purpose of reducing the outer diameter of the cutter head and smoothly hoisting the cutter head out of the well.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a telescopic shaft entry driving machine blade disc which characterized in that: comprises a central cutter head body (1), a limiting amplitude arm (2), a movable amplitude arm (3), a fastening assembly (4) and a driving assembly (5);
the central cutter head body (1) is arranged in the middle of the cutter head and is used for being connected with a main drive of the heading machine;
the limiting arm arms (2) are arranged in a hollow structure and are provided with a plurality of limiting arm arms arranged along the circumferential direction of the central cutter head body (1), one end of each limiting arm (2) is connected with the central cutter head body (1), and the other end of each limiting arm extends towards the outer side of the cutter head;
the number of the movable spoke arms (3) is equal to that of the limiting spoke arms (2) and the movable spoke arms are arranged in a one-to-one correspondence manner, and a single movable spoke arm (3) is arranged in the corresponding limiting spoke arm (2);
the driving assembly (5) comprises a driving piece (501) and a support (502); one end of the driving piece (501) is connected with the central cutter head body (1), and the other end of the driving piece is provided with a support (502); the support (502) is connected with the movable spoke arm (3) to drive the movable spoke arm (3) to extend or retract relative to the limiting spoke arm (2);
the fastening assembly (4) comprises an elastic piece (401), a base (402) and a claw (403); the elastic piece (401) is sleeved on the driving piece (501); the base (402) is sleeved on the driving piece (501) and connected with the elastic piece (401), and the clamping jaws (403) are arranged on the base (402); one end of the movable spoke arm (3) close to the limiting spoke arm (2) is provided with a limiting groove matched with the clamping jaw (403), and the clamping jaw (403) moves into the limiting groove and is clamped under the action of the elastic piece (401), so that the movable spoke arm (3) and the central cutter head body (1) are fixed in position.
2. The retractable shaft boring machine cutter head of claim 1, wherein: the jaw (403) and the limit groove of the movable spoke arm (3) adopt one or the combination of more than two of a conical surface structure, a tooth-shaped structure, a polygonal structure and a boss structure which are matched with each other.
3. The retractable shaft boring machine cutter head of claim 2, wherein: a torsion spring (404) is further arranged between the base (402) and the clamping jaw (403), and the clamping jaw (403) is kept close to the inner wall surface of the fixed arm (103) through the tension force of the torsion spring (404).
4. The retractable shaft boring machine cutter head of claim 1, wherein: the central cutter head body (1) comprises a central cylinder (102) and a fixed amplitude arm (103); the fixed amplitude arms (103) are arranged in a plurality along the circumferential direction of the central cylinder (102), and the fixed amplitude arms (103) are equal in number to the limiting amplitude arms (2) and are connected in a one-to-one correspondence manner in a manner of being fixedly connected by a common central line; one end of a single fixed amplitude arm (103) is connected with the central cylinder (102), and the other end of the single fixed amplitude arm extends outwards;
the central cutter head body (1) further comprises flange support legs (101) and a base (104), the base (104) and the central cylinder (102) are arranged in a coaxial mode, and the number of the flange support legs (101) is at least one and is used for connecting the base (104) and the fixed arm (103).
5. The retractable shaft boring machine cutter head of claim 4, wherein: the fixed spokes (103) are all arranged in an inclined mode, and an included angle formed between the central axis of the fixed spokes and the central axis of the central cylinder (102) is set to be 60-75 degrees.
6. The retractable shaft boring machine cutter head of claim 5, wherein: the limiting arm (2) comprises a diameter-changing section with the inner diameter gradually reduced along the extending direction of the movable arm (3), and the outer diameter of the movable arm (3) is matched with the inner diameter of the limiting arm (2);
and a sealing structure is arranged between the movable spoke arm (3) and the fixed spoke arm (103) in the central cutter head body (1).
7. The retractable shaft boring machine cutter head of claim 6, wherein: the fixed spoke arm (103), the limiting spoke arm (2) and the movable spoke arm (3) are all provided with shell knives;
the shell knives arranged on the fixed spoke arm (103) and the limiting spoke arm (2) are staggered with each other;
the shell knives arranged on the movable spoke arms (3) are arranged between the fixed spoke arms (103) and the shell knives arranged on the limiting spoke arms (2) to form a structure which is arranged in a staggered mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639655.3A CN113250697B (en) | 2021-06-09 | 2021-06-09 | Telescopic shaft tunnelling machine cutter head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639655.3A CN113250697B (en) | 2021-06-09 | 2021-06-09 | Telescopic shaft tunnelling machine cutter head |
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| Publication Number | Publication Date |
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| CN113250697A CN113250697A (en) | 2021-08-13 |
| CN113250697B true CN113250697B (en) | 2021-10-08 |
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| CN202110639655.3A Active CN113250697B (en) | 2021-06-09 | 2021-06-09 | Telescopic shaft tunnelling machine cutter head |
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| CN203476335U (en) * | 2013-09-16 | 2014-03-12 | 中铁隧道装备制造有限公司 | Shaft TBM device |
| CN207229105U (en) * | 2017-09-30 | 2018-04-13 | 中铁工程装备集团有限公司 | A kind of drop shaft sinking shaft excavation machine |
| CN108825257B (en) * | 2018-09-05 | 2023-10-20 | 中国铁建重工集团股份有限公司 | Heading machine and super-digging cutter thereof |
| CN109538212A (en) * | 2018-12-06 | 2019-03-29 | 中建地下空间有限公司 | A kind of rotary reducing envelope forming tunneling boring drilling tool |
| CN110130913B (en) * | 2019-06-26 | 2020-08-25 | 中国铁建重工集团股份有限公司 | Shield tunneling machine cutter head, shield tunneling machine and pile passing shield construction method for tunnel tunneling |
| CN112253127A (en) * | 2020-09-07 | 2021-01-22 | 辽宁三三工业有限公司 | Full-section telescopic cutter head structure of shaft heading machine |
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2021
- 2021-06-09 CN CN202110639655.3A patent/CN113250697B/en active Active
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