CN112523768B - Shield constructs machine, blade disc impact and expands and dig actuating device, impact mechanism - Google Patents
Shield constructs machine, blade disc impact and expands and dig actuating device, impact mechanism Download PDFInfo
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- CN112523768B CN112523768B CN202011374019.4A CN202011374019A CN112523768B CN 112523768 B CN112523768 B CN 112523768B CN 202011374019 A CN202011374019 A CN 202011374019A CN 112523768 B CN112523768 B CN 112523768B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 52
- 239000011435 rock Substances 0.000 claims abstract description 42
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 7
- 230000005641 tunneling Effects 0.000 claims abstract description 7
- 230000002441 reversible effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 22
- 238000009527 percussion Methods 0.000 claims description 12
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 16
- 238000001125 extrusion Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 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
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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
- E21D9/0875—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 movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
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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)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a shield machine, a cutter head impact expanding excavation executing device and an impact mechanism, wherein the impact mechanism comprises: the device comprises an impact device, a drilling tool arranged at the end part of the impact device and a retraction steering assembly; the backset steering assembly comprises a backset assembly and/or a steering assembly; the impact equipment is arranged on the cutter head and can rotate along with the rotation of the cutter head; the retraction component drives the impact equipment to be pushed out forwards or retracted backwards, and enables the impact equipment to be retracted passively under the action of external force; the steering assembly drives the impact device to deflect in the forward direction or the reverse direction, and enables the impact device to deflect passively under the action of external force. Under the working condition that rock impact breaking and rock rolling breaking are carried out synchronously, the impact mechanism provided by the invention can effectively avoid the problem that impact equipment is damaged or blocked when the impact equipment is extruded in the forward moving or deflecting direction, greatly improves the continuity of tunnel tunneling, improves the construction efficiency, reduces the equipment loss and prolongs the service life of the impact mechanism.
Description
Technical Field
The invention relates to the technical field of underground engineering construction, in particular to an impact mechanism. In addition, the invention also relates to a cutter head impact expanding and digging executing device comprising the impact mechanism and a shield machine comprising the impact mechanism.
Background
Researches find that the strength of the rock for resisting crushing is high and low, and is related to the compression state and the stress mode of the rock, the rock in the tunneling process of the shield tunneling machine is in a three-dimensional compression state, and the shear strength of the rock under one-way compression is greatly lower than that of the rock under three-way compression, so that the impact mechanism is firstly utilized to impact and cut the adjacent surface, and then the hob is utilized to roll and crush the rock, so that the rock crushing efficiency can be effectively improved.
The linear velocity of the cutter head is gradually increased along with the increase of the radius in the rotating process, in order to ensure the construction efficiency of the shield machine, the minimum linear velocity of the periphery of the cutter head is more than 5m/min, which provides great challenges for the arrangement and the impact characteristics of impact equipment, and the prior art generally carries out impact rock breaking and hobbing cutter rolling of the impact equipment in stages, so that the rock breaking efficiency is low; if the two are carried out synchronously, the impact equipment is easy to cause the drill bit to be blocked and even the drill rod is bent under the conditions of larger deflection load, rock blockage, overlong extension of the impact equipment and the like, so that the construction efficiency is influenced.
In summary, how to improve the rock breaking efficiency is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an impact mechanism, in a process of synchronously performing impact rock breaking and rolling rock breaking, when an impact device is extruded in a forward direction, the impact device may be driven to retract under the driving of a retraction assembly, and when the impact device is extruded in a rotation direction, the impact device may be driven to deflect under the driving of a steering assembly, so as to prevent the impact device from being damaged due to the extrusion of rocks, so that the impact rock breaking and rolling rock breaking may be continuously performed synchronously, and improve rock breaking efficiency.
The invention also provides a cutter head impact expanding and excavating executing device comprising the impact mechanism and a shield machine comprising the impact mechanism.
In order to achieve the above purpose, the invention provides the following technical scheme:
an impact mechanism comprising: the device comprises an impact device, a drilling tool arranged at the end part of the impact device and a backspacing steering assembly;
the backset steering assembly comprises a backset assembly and/or a steering assembly;
the impact equipment is arranged on the cutter head and can rotate along with the rotation of the cutter head;
the retraction component drives the impact equipment to be pushed out forwards or retracted backwards, and enables the impact equipment to be retracted passively under the action of external force;
the steering assembly drives the impact equipment to deflect in the forward direction or the reverse direction, and enables the impact equipment to deflect passively under the action of external force.
Preferably, the impact device further comprises a sliding seat and a tray which is arranged in the sliding seat in a sliding way relative to the sliding seat, and the impact device is connected with the tray.
Preferably, a limiting structure for limiting the sliding distance of the impact equipment relative to the sliding seat is arranged in the sliding seat.
Preferably, the limit structure comprises a first limit structure located on the front side of the impact device and a second limit structure located on the rear side of the impact device.
Preferably, the retraction steering assembly comprises the retraction assembly, and the retraction assembly comprises a retraction cylinder for driving the impact device to move forwards or backwards and a first overflow valve mounted on the retraction cylinder; the retraction oil cylinder is rotationally connected to the tray;
when the impact equipment is extruded in the advancing process, the first overflow valve overflows to enable the impact equipment to retreat.
Preferably, the retraction steering assembly comprises the steering assembly, and the steering assembly comprises a steering cylinder for driving the impact device to deflect and a second overflow valve mounted on the steering cylinder; the steering oil cylinder is rotationally connected with the sliding seat;
when the impact equipment is extruded along with the rotation of the cutter head, the second overflow valve overflows to enable the impact equipment to deflect in the direction opposite to the initial rotation direction of the impact equipment.
Preferably, the end of the drilling tool is tapered from the end connected to the percussion device to the end in contact with the rock.
Preferably, the impact device is a rock drill, or a down-the-hole hammer.
A cutter head impact expanding excavation executing device comprises a cutter head, a hob and any one of the impact mechanisms.
A shield tunneling machine comprises the impact mechanism.
In the process of using the impact mechanism provided by the invention, the drilling tool is arranged at the end part of the impact equipment, and the impact equipment can move forwards under the action of the retraction component to impact and damage rocks; when the impact rock breaking and the rolling rock breaking are carried out synchronously, the impact equipment can rotate along with the rotation of the cutter head, when the impact equipment is extruded in the forward moving direction, external force acts on the retraction assembly, and the retraction assembly drives the impact equipment to retract passively under the action of the external force; when the impact equipment is extruded in the rotating direction, the steering assembly drives the impact equipment to deflect passively under the action of external force.
Compared with the prior art, the impact mechanism provided by the invention can effectively prevent the impact equipment from being damaged or blocked when the impact equipment is extruded in the forward direction under the working condition that the impact rock breaking and the rolling rock breaking are synchronously carried out; the faults of bending the impact equipment or bending the drill rod and the like caused by the extrusion of the impact equipment in the rotating direction can be effectively avoided; therefore, whether the impact equipment is only extruded in the forward moving direction or only extruded in the rotating direction or both extruded in the forward moving direction and the rotating direction, the arrangement of the backspacing steering assembly ensures that the impact equipment has the self-protection function, can effectively solve the technical problems that the impact equipment is damaged and broken and a drilling tool is blocked because a cutterhead forward moving drilling tool is extruded, or the drilling tool is bent because of overlarge deflection force, greatly improves the continuity of tunnel tunneling, improves the construction efficiency, reduces the equipment loss, and prolongs the service life of the impact mechanism; in addition, the impact stability of the impact equipment rotating along with the cutter head can be improved.
In addition, the invention also provides a cutter head impact expanding and excavating executing device comprising the impact mechanism and a shield machine comprising the impact mechanism.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a specific embodiment of a partial structure of a cutter head impact expanding and excavating execution device provided by the invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic diagram of an embodiment of the impact mechanism shown in portion B of FIG. 2;
FIG. 4 is an enlarged view of a portion of the drilling tool shown in section C of FIG. 3;
FIG. 5 is a schematic illustration of the retraction process of the impact mechanism of FIG. 3;
FIG. 6 is a schematic illustration of the impact mechanism of FIG. 3 during a steering event;
fig. 7 is a schematic diagram of the connection relationship between the steering cylinder and the second overflow valve or between the retraction cylinder and the first overflow valve.
In FIGS. 1-7:
the device comprises an impact device 1, a drilling tool 2, a sliding seat 3, a tray 4, a limiting structure 5, a retraction oil cylinder 6, a first overflow valve 7, a steering oil cylinder 8, a second overflow valve 9, a cutter head 10 and a hob 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide an impact mechanism, and under the conditions that the impact mechanism is only extruded in the forward moving direction, only extruded in the rotating direction or extruded in the forward moving direction and the rotating direction, the impact device has a self-protection function, and the technical problems that the impact device is damaged and blocked due to the extrusion of a cutter head forward moving drilling tool, or the impact device is bent due to the overlarge deflection force of the drilling tool and the like can be effectively solved. The other core of the invention is to provide a cutter head impact expanding and digging executing device comprising the impact mechanism and a shield machine comprising the impact mechanism.
Referring to fig. 1-7, fig. 1 is a schematic structural view of a partial structural embodiment of a cutter head impact expanding and excavating execution device according to the present invention; FIG. 2 is an enlarged view of a portion A of FIG. 1; FIG. 3 is a schematic diagram of an embodiment of the impact mechanism shown in section B of FIG. 2; FIG. 4 is an enlarged view of a portion of the drilling tool shown in section C of FIG. 3; FIG. 5 is a schematic illustration of the retraction process of the impact mechanism of FIG. 3; FIG. 6 is a schematic illustration of the impact mechanism of FIG. 3 during a steering event; fig. 7 is a schematic diagram of a connection relationship between the steering cylinder and the second overflow valve or between the retraction cylinder and the first overflow valve.
The impact mechanism provided by the present embodiment includes: the device comprises an impact device 1, a drilling tool 2 arranged at the end part of the impact device 1 and a backspacing steering component; the backset steering assembly comprises a backset assembly and/or a steering assembly; the impact device 1 is arranged on the cutter head 10 and can rotate along with the rotation of the cutter head 10; the retraction component drives the impact device 1 to be pushed out forwards or retracted backwards, and enables the impact device 1 to be retracted passively under the action of external force; the steering component drives the impact device 1 to deflect in the forward direction or the reverse direction, and enables the impact device 1 to deflect passively under the action of external force.
In the process of using the impact mechanism provided by the invention, the drilling tool 2 is arranged at the end part of the impact device 1, and the impact device 1 can move forwards under the action of the retraction component to impact and damage rocks; when rock breaking by impact and rock breaking by rolling are carried out synchronously, the impact device 1 can rotate along with the rotation of the cutter head 10. Under the condition of being only subjected to extrusion force in the forward moving direction, only the backspacing component can be arranged at the moment, external force acts on the backspacing component, and the backspacing component drives the impact equipment 1 to passively retract under the action of the external force; when the impact device 1 is only extruded in the rotating direction, only the steering assembly can be arranged, and the steering assembly drives the impact device 1 to deflect passively under the action of external force; when the impact device 1 is subjected to both forward-moving and rotational-direction pressing forces, the retraction and steering assembly includes a retraction assembly and a steering assembly, and an external force acts on the retraction assembly and the steering assembly to passively steer and retract the impact device 1.
Compared with the prior art, the impact mechanism provided by the embodiment can effectively prevent the impact equipment 1 from being damaged or blocked when the impact equipment 1 is extruded in the forward direction under the working condition that the impact rock breaking and the rolling rock breaking are carried out synchronously; faults that the impact equipment 1 is bent or the drill rod is bent and the like when the impact equipment 1 is extruded in the rotating direction can be effectively avoided; therefore, no matter the impact device 1 is only extruded in the forward moving direction or only extruded in the rotating direction, or both extruded in the forward moving direction and extruded in the rotating direction, the arrangement of the retraction steering assembly enables the impact device 1 to have the self-protection function, the technical problems that the impact device 1 is damaged and broken due to the fact that the cutter head 10 moves forward the drilling tool 2, the drilling tool 2 is blocked, or the impact device 1 is bent due to the fact that the drilling tool 2 is subjected to excessive deflection force and the like can be effectively solved, the continuity of tunnel tunneling is greatly improved, the construction efficiency is improved, the device loss is reduced, and the service life of an impact mechanism is prolonged; in addition, the impact smoothness of the impact device 1 rotating along with the cutter head 10 can be improved.
It should be noted that the drilling tool 2 is generally a drill bit and is disposed at an end of the impact device 1, and the impact device 1 may be a rock drill, or a down-the-hole hammer, or other structures meeting the requirements, which are not described herein again.
In order to conveniently bypass the jammed and pressed position, the end of the drilling tool 2 is arranged to be in a tapered structure from the end connected with the impact device 1 to the end contacted with the rock, as shown in fig. 4, the drilling tool 2 is arranged to be in a tapered structure in the process of impacting the rock, and the tapered side surface has a guiding function after the drilling tool 2 is contacted with the rock in the process of advancing and rotating along with the cutter head 10, so that the jamming and pressing can be effectively avoided.
In order to facilitate the installation of the impact device 1, as shown in fig. 3, the impact device further comprises a sliding seat 3 and a tray 4 which is arranged in the sliding seat 3 in a sliding way relative to the sliding seat 3, wherein the impact device 1 is connected with the tray 4; during the use process, the tray 4 can be directly pushed to move forwards or the tray 4 can be pulled to move back through the backing component; the carriage 3 and thus the percussion device 1 can also be deflected by means of a steering assembly.
In order to make the distance of the single forward movement of the impact device 1 consistent, a limiting structure 5 is arranged in the sliding base 3 for limiting the sliding distance of the impact device 1 relative to the sliding base 3, i.e. during use, the limiting structure 5 can limit the forward and backward movement distance of the impact device 1.
As shown in fig. 3, the limit structure 5 comprises a first limit structure located at the front side of the percussion device 1 and a second limit structure located at the rear side of the percussion device 1. In the using process, after the retraction assembly pushes the impact device 1 to move forwards to the position limited by the first limit structure, the impact device reaches the forward moving limit position, and after the retraction assembly drives the impact device 1 to move backwards to the position limited by the second limit structure, the impact device reaches the backward moving limit position.
The arrangement of the first limiting structure and the second limiting structure enables the impact assembly to be capable of repeatedly and continuously forwards pushing the same distance, the mechanical limitation of the impact equipment 1 to the forward movement and the backward movement distance is achieved, the problem that rock breaking is inconsistent due to the fact that the impact equipment 1 is influenced by the gravity in the rotating process of the cutter head 10 and the propelling force changes is solved, the rock breaking size is strictly controlled when the impact equipment 1 continuously moves, and the rock breaking efficiency is improved.
As shown in fig. 3, the limiting structures 5 are disposed inside the sliding base 3, two first limiting structures are disposed on the front side of the tray 4, two second limiting structures are disposed on the rear side of the tray 4, and the moving distance of the tray 4 relative to the sliding block is limited, so that the impact device 1 is limited in moving forward and moving backward.
Limiting structure 5 can be limiting of mechanical structures such as limiting blocks and positioning pins, limiting structure 5 only limits the forward movement and backward movement distance of impact equipment 1, the impact direction of impact equipment 1 is not changed, and the size, shape and material of limiting structure 5 can be selected according to the characteristics of tunnels and shield machines. The limiting structure 5 can also be realized by detecting the forward movement and the backward movement distance of the backward movement component, a corresponding sensor needs to be arranged, and when the sensor detects the information of the corresponding position, the backward movement component is controlled to stop forward movement or stop backward movement.
When the backspacing steering assembly comprises a backspacing assembly, namely the backspacing steering assembly is a backspacing assembly or a combined structure of the backspacing assembly and the steering assembly, the backspacing assembly comprises a backspacing oil cylinder 6 for driving the impact device 1 to move forwards and backwards and a first overflow valve 7 arranged on the backspacing oil cylinder 6, one end of the backspacing oil cylinder 6 is rotatably connected to the tray 4, and the other end of the backspacing oil cylinder 6 is rotatably connected to the cutter head 10; of course, in the absence of the slide 3 and the tray 4, it is possible to directly rotatably arrange one end of the retraction cylinder 6 on the impact device 1 and the other end on the cutter head 10. When compressed during the advance of the percussion device 1, the first relief valve 7 overflows to retract the percussion device 1.
As shown in fig. 3, fig. 3 is a schematic structural diagram of the impact mechanism before retraction, in this state, the tray 4 slides forward relative to the sliding seat 3 to the position of the first limit structure, so as to impact the rock; as shown in fig. 5, which is a schematic view of the retraction process of the impact mechanism, in this state, the tray 4 slides backward relative to the slider 3 until being retracted to the position of the second limit structure; as shown in fig. 7, which is a schematic view of a connection relationship between the retraction cylinder 6 and the first overflow valve 7, when the impact device 1 is pushed in a forward direction in a forward movement process, the extrusion force is toward a backward direction of the impact device 1, the retraction cylinder 6 is pressed under the action of the extrusion force to raise the pressure of hydraulic oil in an inner cavity of the retraction cylinder, and the first overflow valve 7 connected to the retraction cylinder overflows to retract the retraction cylinder 6, so that the impact device 1 is driven to retract, and the impact device 1 is prevented from being damaged by the extrusion force of rocks.
When the backspacing steering assembly comprises a steering assembly, namely the backspacing steering assembly is a steering assembly or a combined structure of the backspacing assembly and the steering assembly, the steering assembly comprises a steering oil cylinder 8 for driving the impact equipment 1 to deflect and a second overflow valve 9 arranged on the steering oil cylinder 8; the steering oil cylinder 8 is rotationally connected with the sliding seat 3; when the percussion device 1 is pressed during rotation with the cutter head 10, the second overflow valve 9 overflows, so that the percussion device 1 is deflected in the direction opposite to its initial direction of rotation. Of course, in the absence of the slide 3 and the tray 4, the steering cylinder 8 may have one end directly rotatably connected to the impact device 1 and the other end rotatably connected to the cutter head 10, and when being squeezed in the rotating direction, the second overflow valve 9 overflows, and the impact device 1 passively rotates under the action of external force.
As shown in fig. 6 and 7, when the impact device 1 is subjected to an extrusion force in the rotation direction, that is, a large deflection force, under the action of an external force, the oil pressure in the inner cavity of the steering oil cylinder 8 rises, the second overflow valve 9 overflows, the steering oil cylinder 8 deflects, and thus the impact device 1 is driven to deflect, and in the deflection process of the impact device 1, the deflection direction is opposite to the original rotation direction, so that the impact device 1 is prevented from being damaged by the extrusion force in the rotation direction.
After the impact device 1 has retracted and deflected, i.e. after the impact device 1 has bypassed the compressed area or the deflection force has returned to the original level, the impact mechanism is reset.
It should be noted that, in the process of driving the impact device 1 to rotate by the steering oil cylinder 8, the deflection angle of the impact device 1 ranges from 0 ° to 180 °.
In addition to the impact mechanism, the present invention further provides a cutterhead impact reaming and excavating execution device comprising the impact mechanism, the cutterhead 10 and the hob 11 disclosed in the above embodiments, wherein the impact mechanism is mounted on the cutterhead 10, as shown in fig. 1 and 2, the impact mechanism is mounted at the position of the cutterhead 10, during the mounting process of the impact mechanism, if the retraction steering assembly comprises the steering cylinder 8, the second overflow valve 9, the retraction cylinder 6 and the first overflow valve 7, during the mounting process, both the retraction cylinder 6 and the steering cylinder 8 need to be rotatably mounted on the cutterhead 10; for the structure of other parts of the cutter head impact expanding and excavating execution device, reference is made to the prior art, and details are not repeated herein.
In the process of using the cutter head impact expanding excavation executing device provided by the invention, when the impact equipment 1 does not exceed the cutter ring of the cutter head 10 in the axial direction, the state is a non-expanding excavation state; when the drilling tool 2 of the impact device 1 extends 0-1000mm outwards relative to the cutter ring of the hob 11 of the cutter head 10, the drilling tool 2 is in the expanding excavation state, and in the specific use process, according to different actual conditions, the drilling tool 2 can be determined as the expanding excavation state when extending 30-200mm outwards relative to the cutter ring of the hob 11 of the cutter head 10, and the specific determination is carried out according to actual conditions; the retraction oil cylinder 6 can drive the impact equipment 1 to be pushed to a non-expanding excavation state from an expanding excavation state, or drive the impact equipment 1 to be moved to an expanding excavation state from a charging expanding excavation state.
The invention also provides a shield machine comprising the impact mechanism, and the structures of other parts of the shield machine refer to the prior art, which is not described herein again.
The first overflow valve 7 and the second overflow valve 9 mentioned in the present application, and the first and the second of the first limit structure and the second limit structure are only for distinguishing the difference of the positions, and are not distinguished in sequence.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.
The shield machine, the cutter head impact expanding and digging execution device and the impact mechanism provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. An impact mechanism, comprising: the device comprises an impact device (1), a drilling tool (2) and a backspacing steering assembly, wherein the drilling tool (2) is arranged at the end part of the impact device (1);
the backspacing steering assembly comprises a backspacing assembly and a steering assembly;
the impact equipment (1) is arranged on the cutter head (10) and can rotate along with the rotation of the cutter head (10);
the retraction component drives the impact equipment (1) to be pushed out forwards or retracted backwards, and enables the impact equipment (1) to be retracted passively under the action of external force;
the steering assembly drives the impact equipment (1) to deflect in the forward direction or the reverse direction, and enables the impact equipment (1) to deflect passively under the action of an external force;
the impact device is characterized by further comprising a sliding seat (3) and a tray (4) which is arranged in the sliding seat (3) in a sliding mode relative to the sliding seat (3), wherein the impact device (1) is connected with the tray (4);
the retraction assembly comprises a retraction oil cylinder (6) for driving the impact device (1) to move forwards or backwards and a first overflow valve (7) arranged on the retraction oil cylinder (6); the retraction oil cylinder (6) is rotationally connected with the tray (4);
when the impact equipment (1) is extruded in the advancing process, the first overflow valve (7) overflows to enable the impact equipment (1) to retreat;
the steering assembly comprises a steering oil cylinder (8) for driving the impact device (1) to deflect and a second overflow valve (9) arranged on the steering oil cylinder (8); the steering oil cylinder (8) is rotationally connected to the sliding seat (3);
when the impact device (1) is extruded along with the rotation of the cutter head (10), the second overflow valve (9) overflows to enable the impact device (1) to deflect in the direction opposite to the initial rotation direction.
2. The impact mechanism according to claim 1, characterized in that a limit structure (5) is arranged in the slide (3) for limiting the sliding distance of the impact device (1) relative to the slide (3).
3. The impact mechanism according to claim 2, characterized in that said limit structure (5) comprises a first limit structure at the front side of the impact device (1) and a second limit structure at the rear side of the impact device (1).
4. A percussion mechanism according to any of claims 1-3, characterized in that the end of the drill tool (2) is of a tapered construction from the end connected to the percussion device (1) to the end in contact with the rock.
5. A percussion mechanism according to any of claims 1-3, characterized in that the percussion device (1) is a rock drill or a down-the-hole hammer.
6. A cutterhead impact reaming and excavating actuator, characterized by comprising a cutterhead (10), a roller cutter (11) and an impact mechanism according to any one of claims 1 to 5.
7. A shield tunneling machine comprising the impact mechanism of any one of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011374019.4A CN112523768B (en) | 2020-11-30 | 2020-11-30 | Shield constructs machine, blade disc impact and expands and dig actuating device, impact mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011374019.4A CN112523768B (en) | 2020-11-30 | 2020-11-30 | Shield constructs machine, blade disc impact and expands and dig actuating device, impact mechanism |
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| CN112523768A CN112523768A (en) | 2021-03-19 |
| CN112523768B true CN112523768B (en) | 2022-11-25 |
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| CN112855196B (en) * | 2021-04-02 | 2023-04-11 | 中国铁建重工集团股份有限公司 | Cutter head assembly, tunneling device and tunneling construction method |
| CN113605911B (en) * | 2021-08-30 | 2024-02-02 | 中国铁建重工集团股份有限公司 | Cutter head assembly, tunneling equipment and tunneling construction method |
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| CH503166A (en) * | 1968-07-09 | 1971-02-15 | Hydrel Ag | Device for the mining and clearing of soil, especially for pipe jacking and tunnel construction |
| CN105332714A (en) * | 2014-08-11 | 2016-02-17 | 邵鹏 | Mechanical impact crushing device for heading machine |
| CN107165650A (en) * | 2017-07-07 | 2017-09-15 | 闫琳 | A kind of three hammer body impact grinding devices of rock gangway rock tunnelling bolting combined machine |
| CN109184712B (en) * | 2018-09-06 | 2024-03-01 | 西安科技大学 | Self-impact hob for shield machine and method for impact breaking rock surface by using self-impact hob |
| CN109441468B (en) * | 2018-09-29 | 2023-06-23 | 华东交通大学 | Shield excavation surface impact loosening and crushing device and working method thereof |
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2020
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