CN210685995U - Hydraulic cutting hob combined with rock breaking - Google Patents
Hydraulic cutting hob combined with rock breaking Download PDFInfo
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- CN210685995U CN210685995U CN201921011986.7U CN201921011986U CN210685995U CN 210685995 U CN210685995 U CN 210685995U CN 201921011986 U CN201921011986 U CN 201921011986U CN 210685995 U CN210685995 U CN 210685995U
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Abstract
The utility model discloses a jointly break hydraulic cutting hobbing cutter of rock. The cutter comprises a cutter main body, a cutter middle shaft, a cutter reinforcing part, a high-pressure water injection hole, a middle connecting device and a high-pressure water jet channel; the middle shaft of the cutter is positioned on the transverse central line of the cutter main body; the cutter reinforcing part is positioned on the cutter main body; the high-pressure water injection hole is positioned in the middle shaft of the cutter and transversely penetrates through the side surface of the cutter body; the middle connecting device is positioned in the middle of the high-pressure water injection hole; the high-pressure water jet channel is arranged in the cutter main body and communicated with the middle connecting device. The utility model has the advantages of broken rock efficiency is higher, and broken rock effect is better, and the wear rate is less.
Description
Technical Field
The utility model relates to a hard rock tunnel tunnelling equips technical field, and the more specifically it is jointly broken rock's water conservancy cutting hobbing cutter that says so.
Background
With the wide application of the full-face rock tunneling machine in tunnel construction projects such as water conservancy projects, subway projects and traffic projects, higher requirements are provided for the performance of the TBM tunneling device. The existing TBM hob mostly adopts a normal-section disc hob, and the disc hob has the characteristics of wear resistance, easy cutting and the like and is popular in tunnel construction.
At present, the construction of large-scale projects in China is rapidly advanced, particularly in the fields of diversion tunnels, traffic chambers, protection projects and the like, the tunneling function of the TBM is increasingly prominent, the tunneling efficiency of the TBM is improved, and the upgrading and updating of TBM hobs are urgent.
The conventional structure of current TBM hobbing cutter, first hobbing cutter mode do: adopting a common roller hob; the second hob mode is as follows: randomly punching a pattern water jet structure on the blank position of a TBM cutter head, and enabling the water jet structure and a common roller type hob to be arranged at intervals;
however, the rock is broken by adopting the first hob mode, the maximum force required for breaking the rock is large, the hob is easy to wear, and the rock breaking efficiency is low;
adopt above-mentioned second kind hobbing cutter mode, as application number: 201310188881.X, the patent name is 'arrangement method and structure of high-pressure water jet in heading machine cutterhead'; on the basis of the main structure form of the traditional TBM cutter head, a plurality of high-pressure water nozzles are randomly arranged at the blank position of the TBM cutter head, so that the rock breaking efficiency of the TBM is improved, the temperature of the cutter head is reduced, and the environment is protected from dust and is cooled; however, the TBM cutter head is specially provided with the hole for mounting the high-pressure water cutter, so that the TBM cutter head is complex in structure and high in cost, the mechanical hob is randomly cooled, pertinence is not available, water resource waste is easily caused due to the fact that the TBM cutter head is in a normally open state, and the expected effect cannot be achieved.
Therefore, the development of a combined rock-breaking mechanical hob which is simple in structure, capable of reducing the aperture ratio of a TBM cutter head, capable of regulating the opening and closing of a water jet and high in rock-breaking efficiency is urgently needed.
Disclosure of Invention
The utility model aims at providing a hydraulic cutting hobbing cutter of broken rock of combination, simple structure reduces the percent opening of TBM blade disc, can regulate and control opening and close of water jet, and broken rock efficiency is higher, and broken rock effect is better, and the wear rate is less.
In order to realize the purpose, the technical scheme of the utility model is that: the hydraulic cutting hob for jointly breaking rock is characterized in that: the cutting tool comprises a cutting tool main body, a cutting tool middle shaft, a cutting tool reinforcing part, a high-pressure water injection hole, a middle connecting device and a high-pressure water jet channel;
the middle shaft of the cutter is positioned on the transverse central line of the cutter main body;
the cutter reinforcing part is positioned on the cutter main body;
the high-pressure water injection hole is positioned in the middle shaft of the cutter and transversely penetrates through the side surface of the cutter body;
the middle connecting device is positioned in the middle of the high-pressure water injection hole;
the high-pressure water jet channel is arranged in the cutter main body and communicated with the middle connecting device.
In the technical scheme, a plurality of high-pressure water jet channels are arranged; the high-pressure water jet channels are radially arranged by taking the middle connecting device as a center;
a nozzle is arranged on the high-pressure water jet channel; the nozzle is in communication with the high pressure water jet passage.
In the technical scheme, a water flow control valve is arranged on the high-pressure water jet channel; the water flow control valve is positioned between the middle connecting device and the nozzle.
In the technical scheme, the cutter steering sensor is arranged on the side surface of the cutter main body;
a sensing line channel is located in the cutter body, in the cutter reinforcing portion and between the water flow control valve and the cutter steering sensor.
In the above technical solution, the sensing line channel is a hollow structure;
a sensing line is arranged in the sensing line channel;
and the water flow control valve is connected with the cutter steering sensor through the sensing line.
In the technical scheme, the cutter body is in a roller shape;
the cutter main body is at least one of a single-roller structure or a double-roller structure.
In the above technical solution, when the cutter main body is of a single roller structure, the cutter reinforcing part is located on both side surfaces of the cutter main body;
the high-pressure water jet channel is positioned on the longitudinal central plane of the cutter main body;
the nozzle is arranged on the periphery of the cutter main body.
In the above technical solution, when the tool body is of a double-roller structure, the tool body includes a first tool body and a second tool body;
the cutter reinforcing parts are respectively positioned on two side surfaces of the first cutter body and the second cutter body; the first cutter body and the second cutter body are connected in parallel;
the high-pressure water jet channel is positioned on the connecting surface of the two cutter reinforcing parts which are arranged in parallel;
the nozzles are arranged on the peripheries of the connecting surfaces of the two cutter reinforcing parts which are arranged in parallel.
In the technical scheme, six high-pressure water jet channels are provided.
The utility model has the advantages of as follows:
(1) the utility model discloses integrate high-pressure water jet nozzle and mechanical hobbing cutter and arrange and form water conservancy cutting hobbing cutter, need not punch on the TBM blade disc, simple structure, the cost is lower, and the high-pressure water jet nozzle who locates in the mechanical hobbing cutter carries out the pertinence cooling to the mechanical hobbing cutter, and it has simplified the blade disc arrangement structural style that hydraulic rock breaking component and mechanical rock breaking component separately arranged in the present combined rock breaking; the utility model integrates and arranges the mechanical hob structure and the high-pressure water jet structure, optimizes the cutter head arrangement mode and forms a new cutter; the utility model can be realized on the basis of the existing TBM cutter head without great change, and the industrial realizable degree is higher;
the hydraulic cutting hob for combined rock breaking of the utility model adopts a single hob structure or a double hob structure; when the hydraulic cutting hob adopts a single hob structure, a water jet nozzle of the hydraulic cutting hob and a cutting part (namely a cutter main body) of the mechanical hob are both arranged on the outermost side of the cutter in the circumferential direction; when the hydraulic cutting hob adopts a double-hob structure, a water jet nozzle of the hydraulic cutting hob is positioned at the connection part of the two rollers (namely, the mechanical hob), and a cutting part (namely, a cutter main body) of the mechanical hob is positioned at the outermost side of the cutter in the circumferential direction (as shown in fig. 14); the rock breaking effect is good, and the rock breaking efficiency is high;
(2) the utility model discloses cutter steering sensor can be according to the rotation condition of mechanical hobbing cutter, controls the broken rock of high pressure water through the switching control of the corresponding high pressure water jet passageway, can improve the broken rock ability of high pressure water to the utmost extent, can solve the water waste problem that the water jet nozzle normally opens the cause simultaneously;
(3) the high-pressure water jet nozzle and the mechanical hob of the utility model are integrated, compared with the separate arrangement of the high-pressure water jet nozzle and the mechanical hob, the water mist sprayed by the high-pressure water jet has better cooling and abrasion-proof effects on the mechanical hob; compared with a simple superposition mode, the water mist of the hydraulic cutting hob covers the mechanical cutter part more uniformly, and water flows in the cutter, so that the cooling effect is better;
(4) the utility model discloses water conservancy cutting hobbing cutter, by the water conservancy cutting part (being high-pressure water jet) of hobbing cutter grooving in advance in the place ahead of blade disc rolling direction, water conservancy cutting can form the groove (being water conservancy grooving) of certain width and degree of depth, water conservancy cutting process can form the preliminary breakage to the rock of face, on this basis, TBM's water conservancy cutting hobbing cutter's cutter main part (being mechanical hobbing cutter) follows up, roll extrusion cutting water conservancy grooving; the mechanical hob of the hydraulic cutting hob follows the rock fractures formed by the hydraulic cutting groove to extend and expand, and the fractures between the adjacent hydraulic cutting hobs are intersected; cutting rock blocks between adjacent hydraulic cutting hobs into triangular rock slag sheets and elliptical or plate-shaped rock slag sheets; due to the superposition of cutting force, the penetration degree of a mechanical cutter head provided with a hydraulic cutting hob is relatively small when the rock is broken;
(5) the water mist sprayed by the high-pressure water jet of the utility model has better cooling and abrasion-proof effects on the mechanical cutter; on the basis of realizing the same rock breaking effect, the hydraulic cutting hob is adopted, the number of holes formed in the TBM cutterhead can be reduced (the high-pressure water jet and the mechanical cutter are simply superposed to form holes specially for the high-pressure water jet nozzle), the stability and strength requirements of the TBM cutterhead are beneficial, and the manufacturing and material process difficulty of the TBM cutterhead is reduced.
Drawings
Fig. 1 is a schematic view of the partial cross-sectional structure of the present invention.
Fig. 2 is a front perspective view of the present invention.
Fig. 3 is an enlarged view of fig. 2 at a.
Fig. 4 is a schematic right-view partial perspective structure view of fig. 1.
Fig. 5 is a schematic cross-sectional structure of fig. 1.
Fig. 6 is a left partial perspective structural view of fig. 1.
Fig. 7 is a schematic diagram of a rock breaking operation of a conventional mechanical tool.
Fig. 8 is a schematic view of the first rock breaking on the face of the tunnel of the present invention.
Fig. 9 is a schematic view of the structure of the present invention.
Fig. 10 is a partial perspective view of the structure of fig. 9.
Fig. 11 is an enlarged view of fig. 10 at a.
Fig. 12 is a schematic view of the rock breaking device located on the tunnel face.
Fig. 13 is the rock breaking working schematic diagram of the present invention.
Fig. 14 is a schematic diagram of a partial structure of the TBM cutterhead of fig. 9.
Fig. 15 is the working structure diagram of the nozzle of the utility model for breaking rock by high-pressure water jet to form hydraulic grooving.
Fig. 16 is a schematic view of the structure of the rolling rock breaking operation of the cutter main body on the hydraulic grooving of the present invention.
In fig. 7, FN represents the pushing force; FR is denoted as rolling force; m represents the pre-cut rock face; n is expressed as the rock surface after cutting; and Z represents the moving direction of the traditional mechanical cutter when the traditional mechanical cutter breaks the rock.
In fig. 8, when the tool body 1 has a double-roller structure, the present invention is schematically located on the face to break rock; in fig. 8, the direction a is the moving direction of the TBM of the present invention;
t1 denotes a first combined rock breaking hydro-cutting hob and S1 denotes a second combined rock breaking hydro-cutting hob grooving; t1 rolling S1;
t2 denotes a second combined rock-breaking hydro-cutting hob and S2 denotes a third combined rock-breaking hydro-cutting hob slot; t2 rolling S2;
t3 represents a third combined rock-breaking hydraulic cutting hob, and S3 represents a fourth combined rock-breaking hydraulic cutting hob cutting slot; t3 rolling S3;
t4 represents a fourth combined rock-breaking hydraulic cutting hob, and S4 represents a fifth combined rock-breaking hydraulic cutting hob cutting slot; t4 rolling S4;
t5 represents a fifth combined rock-breaking hydraulic cutting hob, and S5 represents a sixth combined rock-breaking hydraulic cutting hob cutting slot; t5 rolling S5;
t6 represents a sixth combined rock-breaking hydro-cutting hob, and S6 represents a first combined rock-breaking hydro-cutting hob cutting groove; t6 rolls S6.
In fig. 12, when the tool body 1 has a double-roller structure, the present invention is schematically located on the face to break rock; in fig. 8, the direction a is the moving direction of the TBM of the present invention;
t1 denotes a first hydro-cutting double hob cutter, S1 denotes a second hydro-cutting double hob cutter grooving; t1 rolling S1;
t2 denotes a second double hob cutter for hydraulic cutting, S2 denotes a third double hob cutter for hydraulic cutting grooving; t2 rolling S2;
t3 denotes a third hydraulically cutting double hob cutter, S3 denotes a fourth hydraulically cutting double hob cutter grooving; t3 rolling S3;
t4 denotes a fourth hydro-cutting double hob cutter, S4 denotes a fifth hydro-cutting double hob cutter grooving; t4 rolling S4;
t5 denotes a fifth hydraulically cutting double hob cutter, S5 denotes a sixth hydraulically cutting double hob cutter grooving; t5 rolling S5;
t6 denotes a sixth hydro-cutting double hob cutter, S6 denotes a first hydro-cutting double hob cutter grooving; t6 rolls S6.
In fig. 13, FN represents the pushing force; FR is denoted as rolling force; m represents cutting the rock surface; n is expressed as the rock surface after cutting; z represents the direction of movement of the present invention when the tool body 1 is a double-roller structure;
n1 is indicated as the first nozzle on a hydraulic cutting hob combined with rock breaking;
n2 represents a second nozzle on a hydraulic cutting hob combined with rock breaking;
n3 represents the third nozzle on the hydraulic cutting hob of the combined rock breaking;
n4 is denoted as the fourth nozzle on the combined rock breaking hydro-cutting hob;
n5 is denoted as the fifth nozzle on the combined rock breaking hydro-cutting hob;
n6 denotes the sixth nozzle on the hydraulic cutting hob of the combined rock breaking;
o → P denotes an injection section of the nozzle;
in FIG. 13, N2 (second nozzle) is spraying and N3 (third nozzle) is about to spray; n1 (first nozzle), N4 (fourth nozzle), N5 (fifth nozzle), N6 (sixth nozzle) did not eject.
In fig. 14, when the main body of the cutter is of a double-roller structure, two adjacent double-roller combined rock-breaking hydraulic cutting hobs which are arranged circumferentially are staggered by one hob body position along the circumferential direction.
In fig. 15 and 16, E denotes a face to be broken; f represents hydraulic grooving.
In the figure, 1-a cutter body, 1.1-a first cutter body, 1.2-a second cutter body, 2-a cutter middle shaft, 3-a cutter reinforcing part, 4-a high-pressure water injection hole, 5-a middle connecting device, 6-a high-pressure water jet channel, 6.1-a nozzle, 7-a water flow control valve, 8-a cutter steering sensor, 9-a sensing line channel and 10-a sensing line.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.
With reference to the accompanying drawings: the hydraulic cutting hob combined with rock breaking comprises a hob main body 1, a hob middle shaft 2, a hob reinforcing part 3, a high-pressure water injection hole 4, a middle connecting device 5 and a high-pressure water jet channel 6;
the cutter middle shaft 2 is positioned on the transverse central line of the cutter main body 1 and is a bearing part of the cutter main body 1; the cutter main body 1 can roll by taking the cutter middle shaft 2 as a rotating center;
the cutter reinforcing part 3 is positioned on the cutter main body 1; the cutter reinforcing parts are positioned on two side surfaces of the cutter and distributed symmetrically, so that the function of reinforcing the strength of the cutter is achieved;
the high-pressure water injection hole 4 is positioned in the cutter middle shaft 2 and transversely penetrates through the cutter main body 1;
the middle connecting device 5 is positioned in the middle of the high-pressure water injection hole 4; the middle connecting device is positioned at the intersection of the high-pressure water injection holes, is positioned at the center of the cutter and has a shunting function;
the high-pressure water jet passage 6 is arranged in the tool body 1 and is communicated with the middle connecting device 5 (as shown in fig. 1, 2, 3 and 4); the high-pressure water injection hole is positioned in the center of the center shaft of the cutter main body and is concentric with the center shaft of the cutter.
The high-pressure water jet channels 6 are multiple; the high-pressure water jet channels 6 are radially arranged by taking the middle connecting device 5 as a center; the high-pressure water jet channel 6 and the middle connecting device 5 spray high-pressure water flow in the middle connecting device 5 from multiple directions to form water jet rock breaking in multiple directions and achieve the effect of cooling and abrasion prevention of the mechanical cutter.
The high-pressure water jet channel 6 is provided with a nozzle 6.1; the nozzle 6.1 is communicated with the high-pressure water jet channel 6; a high pressure water stream is injected through the nozzle 6.1.
A water flow control valve 7 is arranged on the high-pressure water jet passage 6; the water flow control valve 7 is positioned between the middle connecting device 5 and the nozzle 6.1; the water flow control valves are used for controlling the opening and closing of the high-pressure water jet channels, and the number of the water flow control valves is consistent with that of the high-pressure water jet channels; the cutter steering controller is positioned on the surface of the cutter and has the function of detecting and judging the rotation angle of the cutter.
A cutter steering sensor 8 is arranged on the side surface of the cutter body 1;
a sensing line channel 9 is positioned in the cutter body 1, the cutter reinforcing part 3 and between the water flow control valve 7 and the cutter steering sensor 8; the sensing line channel is used for sensing the passing of the line.
The sensing line channel 9 is in a through hole structure (as shown in fig. 2, 3, 6 and 9) for supporting the passing of the sensing line;
a sensing line 10 is arranged in the sensing line channel 9;
the water flow control valve 7 is connected with the cutter steering sensor 8 through the sensing line 10 (as shown in fig. 5 and 6); the sensing circuit is used for connecting the water flow control valve with the cutter steering sensor, and the cutter steering controller transmits signals through the sensing circuit and is used for controlling the opening and closing of the water flow control valve; the condition of water resource waste caused by the fact that the nozzle is normally opened in the prior art is overcome.
The cutter body 1 is a roller type hob (as shown in fig. 1) and is a mechanical hob for breaking rock;
the tool body 1 is at least one of a single-roller structure or a double-roller structure (as shown in fig. 2 and 9); the cutter main body can be designed into a single-wheel structure, a double-wheel structure or other multi-wheel structures according to the requirements of actual working rock breaking hardness and the like.
When the cutter body 1 is of a single-roller structure, the cutter reinforcing parts 3 are positioned on two side surfaces of the cutter body 1;
the high-pressure water jet channel 6 is positioned on the longitudinal central plane of the cutter main body 1;
the nozzle 6.1 is arranged on the periphery of the cutter body 1 (as shown in fig. 1, 2, 3, 4, 5 and 6); the rock breaking efficiency is improved.
According to the requirement of rock breaking hardness in actual work, when the cutter main body 1 is of a double-roller structure, the cutter main body 1 comprises a first cutter main body 1.1 and a second cutter main body 1.2;
the cutter reinforcing parts 3 are respectively positioned on two side surfaces of the first cutter body 1.1 and the second cutter body 1.2; the first cutter body 1.1 and the second cutter body 1.2 are connected in parallel;
the high-pressure water jet channel 6 is positioned on the connecting surface of the two cutter reinforcing parts 3 which are arranged in parallel;
the nozzles 6.1 are provided on the outer peripheries of the joint faces of the two cutter reinforcing portions 3 arranged in parallel (as shown in fig. 9, 10, 12, 13, and 14), so that the rock breaking efficiency is improved, and the wear is reduced.
The high-pressure water jet channels 6 are six (as shown in fig. 4, 5 and 6); the high-pressure water jet channel 6 and the middle connecting device 5 spray high-pressure water flow in the middle connecting device 5 from six directions to form water jet rock breaking in six directions and achieve the effects of cooling and abrasion resistance on a mechanical cutter; the number of the high-pressure water jet channels 6 can be set according to actual needs.
Work as when cutter main part 1 is single gyro wheel structure, the work process of the hydraulic cutting hobbing cutter of the combination broken rock include following content:
the rock breaking process of the water jet flow comprises the following steps:
as shown in fig. 3: the high-pressure water injection hole 4 is a water injection channel for external high-pressure water, and the external high-pressure water enters the middle connecting device 5 through the high-pressure water injection hole 4 after being accessed; the middle connecting device is communicated with each high-pressure water jet channel 6, high-pressure water entering the middle connecting device 5 further enters each high-pressure water jet channel 6, and the outflow of the high-pressure water is controlled by a water flow control valve 7; when the water flow control valve 7 receives a jet flow signal sent by the cutter steering sensor 8, the water flow control valve 7 is opened, high-pressure water jet flow is sprayed out, and water jet flow is started to break rock; similarly, when the water flow control valve 7 receives a closing signal sent by the cutter steering sensor 8, the water flow control valve 7 is closed, the high-pressure water jet is cut off by the water flow control valve 7, and the water jet is stopped to break rock.
The working process of the cutter steering sensor comprises the following steps:
as shown in fig. 3 and 8: when the hydraulic cutting hob works, a cutter steering sensor 8 positioned on the surface of the cutter main body 1 can identify the steering position of the cutter main body 1; when the roller rotates to a certain position, the cutter steering sensor 8 feeds back the acquired steering angle, namely the position of the nozzle 6.1 to the water flow control valve 7 to control the opening and closing of the water flow; taking fig. 8 as an example, when the tool body 1 is rotated to this position, the third nozzle N3 parallel to the palm surface is about to turn to the palm surface according to the forward direction, i.e., the third nozzle N3 is about to spray; the hob process between the point O of the initial injection point and the point P of the lowest point of the hob is the position where the hydraulic cutting hob for jointly breaking rock is injecting, namely the second nozzle N2 is injecting; the first nozzle N1, the fourth nozzle N4, the fifth nozzle N5 and the sixth nozzle N6 are in the spray stop state at the positions other than the starting spray point O to the lowest point P of the tool body 1; it should be noted that the numbers of the high-pressure water jet channel 6 and the nozzle 6.1 of the hydraulic cutting hob for combined rock breaking shown in fig. 8 are only used as the display, the indication of the hydraulic cutting rolling working principle of the hydraulic cutting hob for combined rock breaking is that the number of the high-pressure water jet channel 6 in the hydraulic cutting hob for combined rock breaking is required to be configured according to the requirements of the diameter of the cutterhead, the pressure of the water jet, the energy consumption of rock breaking and the like.
The working process of the hydraulic cutting hob in TBM construction comprises the following steps:
as shown in fig. 7: in the specific work progress, water conservancy cutting hob is different from traditional machinery hob be: in the rotation direction of a TBM cutter head, a hydraulic cutting hob can be before the mechanical part of the hob arrives, a nozzle 6.1 of a high-pressure water jet channel 6 pre-cracks rock on the tunnel face through high-pressure water jet on the advancing track of the mechanical part of the hob, and the high-pressure water jet can generate a cutting groove with a certain depth and width in front of the advancing track of the mechanical part of the hob; the width of the groove can be determined by the nozzle aperture of the high-pressure water jet and the water jet speed (the aperture of the water jet represents the diameter of the jet, and research shows that the acting force of the water jet is related to the speed of the water jet when the water jet impacts cutting, namely the actual acting range is larger than the direct jet contact area of the water jet), and the depth of the groove is related to the speed of the water jet (the speed of the water jet is derived from the water pressure and the nozzle aperture); the cutter main body 1 (namely a mechanical hob) is positioned between the high-pressure water jets (namely water knives), the cutter main body 1 and the high-pressure water jets synchronously run in time, the high-pressure water jets break rock firstly to form a hydraulic cutting groove, the width of the hydraulic cutting groove is larger than that of the cutter main body 1, and the cutter main body 1 rolls on the hydraulic cutting groove to break rock;
the acting force generated by the water jet is different in magnitude at different positions away from the nozzle, and the farther the nozzle is away from the nozzle, the smaller the acting force is; therefore, in order to cut a groove of equal depth, the water pressure needs to be adjusted, that is, the required water pressure is the maximum immediately before the third nozzle N3 at point O starts spraying, and the required water pressure is the minimum at point P at the lowest position of the cutter head.
When cutter main part 1 is two gyro wheel structure, the working process with cutter main part 1 is single gyro wheel structure, and the difference lies in:
the hydraulic-mechanical combined rock breaking is realized, the front and rear hydraulic cutting double-hob cutters 5 are staggered by one hob body position, the nozzles at the joint of the cutter main bodies 5.1 of the front hydraulic cutting double-hob cutter 5 spray high-pressure water to break rock to form a hydraulic pre-cutting groove, the cutter main body 5.1 (namely, the mechanical cutter part of the double-roller structure) next to the hydraulic pre-cutting groove formed by the front high-pressure water jet nozzle rolls the hydraulic pre-cutting groove (as shown in fig. 9, fig. 12, fig. 13 and fig. 14), and the time for breaking a rock sample after the hydraulic pre-cutting groove is formed by rock breaking through the nozzles is shorter, so the rock breaking efficiency is higher; the maximum force exerted by the tool body 5.1, i.e. the mechanical tool part of the double hob, is reduced, the counter force to which the tool is subjected is correspondingly reduced, and the wear on the tool is correspondingly reduced.
Taking a sandstone sample with the size of 150mm multiplied by 100mm as an example, a penetration test (main normal force of rock breaking by a TBM hob) is carried out on the sandstone sample;
performing a penetration test on the white sandstone sample by adopting a mechanical hob in the prior art, wherein the maximum force required for destroying the white sandstone sample reaches 140 KN;
the hydraulic cutting hob for jointly breaking rock carries out injection experiment on the white sandstone sample, after the white sandstone sample is subjected to water jet pre-grooving treatment, the hob injection experiment is carried out again, the maximum force required for breaking the white sandstone sample is only 40KN, the rock breaking force is reduced by more than 70%, and the time for breaking the white sandstone sample after the water jet pre-grooving treatment is shorter, so that the rock breaking efficiency is higher; similarly, because the maximum force applied by the hydraulic cutting hob for combined rock breaking of the utility model is reduced, the counter force born by the hob is correspondingly reduced, and the abrasion to the hob is correspondingly reduced; the rock breaking speed is faster.
The utility model discloses a water sword cutting causes that there is the crack to produce after the preliminary destruction of white sandstone sample, again through the hobbing cutter cutting, and the power of exerting reduces, and broken rock time shortens, and the broken rock degree of difficulty is lower relatively.
In order to more clearly illustrate the advantages of the combined rock breaking hydraulic cutting hob compared with the prior art (the mechanical rock breaking hob and the existing high-pressure water jet nozzle on the TBM cutterhead and the mechanical hob adopt a simple superposition combination mode to break the rock on the cutterhead) structure, the two technical schemes are compared by the staff, and the comparison results are as follows:
from the above table, compared with the structure in the prior art (the mechanical rock breaking hob and the existing high-pressure water jet nozzle on the TBM cutterhead and the mechanical hob adopt a simple superposition combination mode to break the rock on the cutterhead), the hydraulic cutting hob for jointly breaking the rock has the advantages of higher rock breaking efficiency, lower rock breaking energy consumption and lower cutterhead loss rate.
Other parts not described belong to the prior art.
Claims (9)
1. The hydraulic cutting hob for jointly breaking rock is characterized in that: comprises a cutter main body (1), a cutter middle shaft (2), a cutter reinforcing part (3), a high-pressure water injection hole (4), a middle connecting device (5) and a high-pressure water jet channel (6);
the cutter middle shaft (2) is positioned on the transverse central line of the cutter main body (1);
the cutter reinforcing part (3) is positioned on the cutter main body (1);
the high-pressure water injection hole (4) is positioned in the cutter middle shaft (2) and transversely penetrates through the cutter main body (1);
the middle connecting device (5) is positioned in the middle of the high-pressure water injection hole (4);
the high-pressure water jet channel (6) is arranged in the cutter main body (1) and communicated with the middle connecting device (5).
2. The combination rock breaking hydro-cutting hob of claim 1, wherein: the number of the high-pressure water jet channels (6) is multiple; the high-pressure water jet channels (6) are radially arranged by taking the middle connecting device (5) as a center;
a nozzle (6.1) is arranged on the high-pressure water jet channel (6); the nozzle (6.1) is communicated with the high-pressure water jet channel (6).
3. The combination rock breaking hydro-cutting hob of claim 2, characterized in that: a water flow control valve (7) is arranged on the high-pressure water jet channel (6); the water flow control valve (7) is positioned between the middle connecting device (5) and the nozzle (6.1).
4. The combination rock breaking hydro-cutting hob according to claim 3, characterized in that: a cutter steering sensor (8) is arranged on the side surface of the cutter body (1);
a sensing line channel (9) is arranged in the cutter body (1), in the cutter reinforcing part (3) and between the water flow control valve (7) and the cutter steering sensor (8).
5. The combination rock breaking hydro-cutting hob according to claim 4, characterized in that:
the sensing line channel (9) is of a hollow structure;
a sensing line (10) is arranged in the sensing line channel (9);
the water flow control valve (7) is connected with the cutter steering sensor (8) through the sensing line (10).
6. The combination rock breaking hydro-cutting hob according to claim 5, characterized in that: the cutter body is in a roller shape;
the cutter body (1) is at least one of a single-roller structure or a double-roller structure.
7. The combination rock breaking hydro-cutting hob of claim 6, wherein: when the cutter main body (1) is of a single-roller structure, the cutter reinforcing parts (3) are positioned on two side surfaces of the cutter main body (1);
the high-pressure water jet channel (6) is positioned on the longitudinal central plane of the cutter main body (1);
the nozzle (6.1) is arranged on the periphery of the cutter body (1).
8. The combination rock breaking hydro-cutting hob of claim 6, wherein: when the cutter body (1) is of a double-roller structure, the cutter body (1) comprises a first cutter body (1.1) and a second cutter body (1.2);
the cutter reinforcing parts (3) are respectively positioned on two side surfaces of the first cutter main body (1.1) and the second cutter main body (1.2); the first cutter body (1.1) and the second cutter body (1.2) are connected in parallel;
the high-pressure water jet channel (6) is positioned on the connecting surface of the two cutter reinforcing parts (3) which are arranged in parallel;
the nozzles (6.1) are arranged on the periphery of the connecting surface of the two cutter reinforcing parts (3) which are arranged in parallel.
9. The combination rock breaking hydrocutting hob according to claim 7 or 8, characterized in that: six high-pressure water jet channels (6) are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921011986.7U CN210685995U (en) | 2019-07-02 | 2019-07-02 | Hydraulic cutting hob combined with rock breaking |
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| CN111997641A (en) * | 2020-08-24 | 2020-11-27 | 中国矿业大学 | Direction-controllable hydraulic auxiliary rock breaking mechanism and cutting method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111997641A (en) * | 2020-08-24 | 2020-11-27 | 中国矿业大学 | Direction-controllable hydraulic auxiliary rock breaking mechanism and cutting method thereof |
| CN111997641B (en) * | 2020-08-24 | 2021-06-25 | 中国矿业大学 | Direction-controllable hydraulic auxiliary rock breaking mechanism and cutting method thereof |
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