CN111577305A - Water jet nozzle device suitable for assisting hob to break rock and arrangement method thereof - Google Patents
Water jet nozzle device suitable for assisting hob to break rock and arrangement method thereof Download PDFInfo
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- CN111577305A CN111577305A CN202010403275.5A CN202010403275A CN111577305A CN 111577305 A CN111577305 A CN 111577305A CN 202010403275 A CN202010403275 A CN 202010403275A CN 111577305 A CN111577305 A CN 111577305A
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- rock
- jet nozzle
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 239000011435 rock Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 74
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 239000003082 abrasive agent Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention provides a water jet nozzle device suitable for assisting a hob to break rock and an arrangement method thereof, wherein the device comprises the following components: the fixing base comprises a fixing disc, a spring base and an adjusting base plate; the movable nozzle is provided with a water jet nozzle assembly in the center, the outer side of the water jet nozzle assembly is wrapped with a hollow rectangular protective sleeve, and the outer side of the protective sleeve is wrapped with a hollow rectangular sliding sleeve; the following roller is fixedly connected to the outer side of the sliding sleeve through a roller shaft, and the roller shaft can be movably connected with a roller; the water jet pipeline is positioned above the movable spray head and comprises a water jet pipeline and an abrasive hose; according to the situation, a water jet spray head device can be arranged on one side or two sides of the hob; the invention can greatly shorten the jet distance between the water jet nozzle on the cutter head and the rock surface, improve the water jet cutting effect and improve the auxiliary rock breaking effect.
Description
Technical Field
The invention relates to a tunnel boring machine, in particular to a water jet nozzle device suitable for assisting a hob to break rock and an arrangement method thereof.
Background
The TBM adopts a hob to break rock, and when the hob breaks the rock, a cutter ring is required to be pressed into the rock to form crack propagation, and the crack penetrates through the broken rock through the crack of the track of the adjacent hob. When the mode is used for encountering hard rocks, particularly extremely hard rocks, the hob is difficult to press into the rock surface due to high rock hardness and good structural integrity, or the hob is easy to overload due to small pressing depth and large load, so that the hob ring is fast worn, and is broken or edge-tipping is frequent; the tunnel excavation efficiency is very low, the cutter loss cost is very high, and the tunnel excavation method becomes a significant risk source for TBM construction.
The key for improving the efficiency of crushing the extremely hard rock by the hob is to reduce the resistance of the cutter ring pressed into the rock or improve the pressing depth under the same pressing force, and the high-pressure water jet flow is adopted to assist the hob to crush the rock, so that the test and theoretical analysis prove that the effect is good, and the rock crushing load of the hob can be greatly reduced. The water jet assisted hob rock breaking has multiple modes, wherein the water jet kerf assisted hob rock breaking can be adopted in an extremely hard rock stratum, a water jet is firstly adopted to cut a kerf with a certain depth on a rock surface, the structural integrity of original extremely hard rock is damaged, so that the breaking strength of the original extremely hard rock is weakened, the hob is used for rolling and breaking, and the rock breaking load of the hob at the moment is greatly reduced. The primary problem and difficulty with this rock breaking technique is how to ensure the lancing effect (depth and straightness).
The water jet lancing effect is greatly influenced by the distance from the spray head to the rock surface, the great distance can cause shallow lancing depth, and the large vibration linearity difference also causes shallow lancing depth. Vibrations are very big when the TBM blade disc is tunneled, and the rock between the hobbing cutter orbit link up the breakage through the crackle, and the broken rock face of formation often the height fluctuation is uneven, and present water jet shower nozzle is many fixed mounting on the blade disc, between two hobbing cutters, and the distance between shower nozzle and the rock face is along with the blade disc vibration, the rock face fluctuation change is big, seriously influences the joint-cutting effect, and then influences the broken rock effect of hobbing cutter.
Therefore, how to improve the cutting effect of the water jet nozzle arranged on the TBM cutter head in the extremely hard rock stratum becomes a great problem restricting the application effect and the popularization prospect of the technology.
Disclosure of Invention
The invention provides a water jet nozzle device suitable for assisting a hob to break rock and an arrangement method thereof, and aims to improve the cutting effect of a water jet nozzle arranged on a TBM cutter head of an extremely hard rock stratum.
In order to achieve the above object, the present invention provides a water jet device suitable for assisting a hob to break rock, comprising:
the fixing device comprises a fixing base, a fixing disc and a fixing disc, wherein the outer side of the fixing base is provided with the fixing disc, the lower part of the fixing disc is a rectangular protrusion, and the center of the fixing disc is provided with a T-shaped channel; the upper end of the T-shaped channel is round, and the lower end of the T-shaped channel is rectangular; the upper end of the T-shaped channel is provided with a disc-shaped spring base with a protruding lower part, the center of the spring base is provided with a circular through hole, and the protruding part of the lower part of the spring base is matched with the rectangular channel of the T-shaped channel; an adjusting base plate is arranged between the outer side of the spring base and the fixed disc, a base bolt assembly is arranged at the upper end of the outer side of the spring base, one end of the base bolt assembly is located at the upper end of the outer side of the spring base, and the other end of the base bolt assembly penetrates through the adjusting base plate and is located in the fixed disc;
the movable spray head is positioned in the lower side of the T-shaped channel in the center of the fixed disc; the movable spray head is characterized in that a water jet spray head component is arranged in the center of the movable spray head, a protrusion is arranged on the outer side of one end of the water jet spray head component and is positioned above the spring base, the other end of the water jet spray head component penetrates through a circular through hole in the center of the spring base and penetrates through the T-shaped channel to be discharged, an annular middle boss is arranged in the middle of the water jet spray head component, a spring is sleeved between the middle boss and the annular protrusion, a hollow rectangular protective sleeve is wrapped on the outer side of the water jet spray head component at the lower end of the middle boss, a hollow rectangular sliding sleeve is wrapped on the outer side of the protective sleeve, the sliding sleeve is matched and movably connected with the inner wall of the;
the following roller is fixedly connected to the outer side of the sliding sleeve through a roller shaft, and the roller shaft can be movably connected with a roller;
the water jet pipeline is positioned above the movable spray head and comprises a water jet pipeline and an abrasive hose; one end of the water jet pipeline is connected with the water jet spray head assembly, and the other end of the water jet pipeline is provided with a water jet electric control valve; one end of the abrasive hose is connected with the water jet spray head assembly, and the other end of the abrasive hose is provided with an abrasive electric control valve.
Preferably, a sealing plate is further arranged at the joint of the lower end of the fixed disc and the sliding sleeve of the movable spray head, and a rectangular through hole with the same size as the cross section of the sliding sleeve is formed in the middle of the sealing plate.
Preferably, the sealing plate is fixedly connected with the lower end of the fixed plate through a sealing bolt assembly.
Preferably, the water jet spray head assembly is hollow and is provided with a water jet channel; a water inlet is formed in the protruding end of the water jet spray head assembly, an upper pipe body is arranged between the water outlet and the middle boss, a lower pipe body is arranged below the middle boss, and a spray head outlet is further formed in the bottom end of the lower pipe body; the grinding material straight pipe is connected to the grinding material interface.
Preferably, the water outlet is connected with the water jet pipeline, and the abrasive straight pipe is connected with the abrasive hose.
Preferably, the upper end of the outer side of the fixed disc is further provided with a bolt assembly, and the fixed disc is fixed on a cutterhead panel through the bolt assembly.
Correspondingly, the invention also provides an arrangement method of the water jet nozzle device suitable for assisting the hob to break rock, which comprises the following steps:
in the first scheme, 1 water jet nozzle device is arranged on the same side of each hob;
rock cutting seams generated by the water jet nozzle device are positioned between two adjacent hob rolling tracks; along the rotating direction of the cutter head, a water jet spray head device is arranged in front of each hob side and is arranged on a cutting track close to the center of the cutter head or far away from the center of the cutter head; the hobs of adjacent hobs' tracks have a phase angle difference beta, and the spray head is opened in the whole course to perform lancing during the rotation of the cutterhead to break rock. When the cutter head starts to rotate rock, all the hobbing cutters start to break the rock at the same time, so that when the hobbing cutters which have phase angle difference beta and are positioned at the rear side are seen from the rotation direction of the cutter head, the angle range of beta in one rotation is a single-side cutting seam auxiliary rock breaking mode, and the range of 2 pi-beta is a double-side cutting seam auxiliary rock breaking mode.
In the second scheme, 1 water jet spray head device is arranged on each of two sides of each hob;
the rock cutting seam of the water jet nozzle device is positioned between the rolling tracks of the two adjacent hobs; along the cutter head direction of rotation, a water jet spray head is evenly arranged on the cutting track of the water jet spray head device adjacent to the two sides of each hob, 2 sets of water jet spray head devices are arranged on the rolling track of each hob, the hob can be in the rock breaking mode assisted by the cutting of the two sides at any time, and the concrete operation mode is as follows:
half a quantity of water jet spray head devices need to be continuously opened within the time of one circle of rotation of the cutter head, the other half quantity of water jet spray heads can be opened and closed according to the arrangement phase angle of each hob, and the specific operation requirements are as follows: and when the adjacent hob finishes one rotation and begins the next rock breaking cycle, all the closed water jet nozzle devices are opened, and the cycle operation is carried out.
The scheme of the invention has the following beneficial effects: in the invention, the roller is contacted with the surface of the rock, and the positions of the water jet spray head device and the disk-shaped roller are relatively fixed, so that the distance between the spray head and the surface of the rock is relatively unchanged no matter how the surface of the rock fluctuates; the roller wheel rotates synchronously along with the cutter head, the rolling track of the roller wheel is close to the joint cutting track of the water jet, the roller wheel directly contacts with the rock surface which changes in fluctuation and follows the fluctuation of the rock surface to self-adapt to fluctuation, and simultaneously drives the water jet device to fluctuate.
Drawings
FIG. 1 is a structural view of a water jet head apparatus of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line D-D of FIG. 1;
FIG. 4 is a view taken along line C of FIG. 1;
FIG. 5 is a schematic view of a water jet assembly;
FIG. 6 is a view showing an internal structure of an automatic following water jet head device in a compressed state;
FIG. 7 is a schematic view of the water jet nozzle assembly retracted within the cutter head;
FIG. 8 is a schematic view of an arrangement of the water jet nozzle device on the cutter head;
fig. 9 is a schematic view of a second arrangement of the water jet spray head device on the cutter head.
Description of the reference numerals
1-a cutter head panel; 2-a bolt assembly; 3-a base bolt assembly; 4-adjusting the base plate; 5, fixing the disc; 6-an abrasive hose; 7-water jet pipe; 8-a spring base; 9-a water jet spray head assembly; 9.1-water inlet; 9.2-upper pipe body; 9.3-water jet channel; 9.4-middle boss; 9.5-lower tube body; 9.6-abrasive interface; 9.7-straight abrasive pipe; 9.8-nozzle outlet; 10-a spring; 11-a seal bolt assembly; 12-sealing plate; 13-sealing ring; 14-a sliding sleeve; 15-protective sleeve; 16-a roller; 17-roller shaft; 18-face rock formation; 19-hob; 19.1-demonstration hob; 19.2-hob A; 19.3-hob B; 20-water jet; 21-cutting a rock joint; 22-a cutter head; 23-rolling track of hob; 24-cutting trajectory of water jet nozzle device; 25-water jet spray head device; 25.1-water jet nozzle; 25.2-water jet nozzle A; 25.3-water jet nozzle B; 25.4-water jet C; 26-cutter head closing plate; 27-water jet electric control valve; 28-abrasive electrically controlled valve.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Aiming at the existing problems, the invention provides a water jet nozzle device suitable for assisting a hob to break rock, which comprises:
the fixing device comprises a fixing base, wherein a fixing disc 5 is arranged on the outer side of the fixing base, the lower part of the fixing disc 5 is a rectangular protrusion, and a T-shaped channel is arranged in the center of the fixing disc 5; the upper end of the T-shaped channel is round, and the lower end of the T-shaped channel is rectangular; a disc-shaped spring base 8 with a protruding lower part is arranged at the upper end of the T-shaped channel, a circular through hole is formed in the center of the spring base 8, and the protruding part of the lower part of the spring base 8 is matched with the rectangular channel of the T-shaped channel; an adjusting base plate 4 is arranged between the outer side of the spring base 8 and the fixed disc 5, a base bolt assembly 3 is arranged at the upper end of the outer side of the spring base 8, one end of the base bolt assembly 3 is located at the upper end of the outer side of the spring base 8, and the other end of the base bolt assembly passes through the adjusting base plate 4 and is located in the fixed disc 8;
the movable spray head is positioned in the lower side of the central T-shaped channel of the fixed disc 5; a water jet nozzle assembly 9 is arranged at the center of the movable nozzle, a protrusion is arranged on the outer side of one end of the water jet nozzle assembly 9 and is positioned above the spring base 8, the other end of the water jet nozzle assembly passes through a circular through hole in the center of the spring base 8 and penetrates through the T-shaped channel to be discharged, an annular middle boss 9.4 is arranged in the middle of the water jet nozzle assembly 9, a spring 10 is sleeved between the middle boss 9.4 and the annular protrusion, a hollow rectangular protective sleeve 15 wraps the outer side of the water jet nozzle assembly 9 at the lower end of the middle boss 9.4, a hollow rectangular sliding sleeve 14 wraps the outer side of the protective sleeve 15, the sliding sleeve 14 is engaged with and movably connected with the inner wall of the fixed disk 5, and a rectangular channel is arranged between the sliding sleeve 14 and the inner wall of;
the following roller is fixedly connected to the outer side of the sliding sleeve 14 through a roller shaft 17, and the roller shaft 17 can be movably connected with a roller 16;
the water jet pipeline is positioned above the movable spray head and comprises a water jet pipeline 7 and an abrasive hose 6; one end of the water jet pipeline 7 is connected with the water jet spray head assembly 9, and the other end of the water jet pipeline is provided with a water jet electric control valve 27; one end of the abrasive hose 6 is connected with the water jet nozzle component 9, and the other end is provided with an abrasive electric control valve 28.
The mounting number and the thickness of the adjusting base plates can be adjusted, so that the compression amount of the spring 10 can be conveniently changed; in the same way, the installation height of the fixed base on the cutter head panel can be adjusted by changing the number and the thickness of the cutter head seal plates, so that the relative distance between the end surface of the fixed base and the rock layer of the tunnel face can be adjusted; the movable connection of the roller and the roller shaft enables the roller to be installed obliquely and to be close to the position of the water jet cutting seam to the maximum extent, and the roller contacts the rock surface of the cutting seam position and moves along with the rock surface of the position to drive the outlet end of the spray head connected with the roller to move up and down.
Wherein, the joint of the lower end of the fixed disk 5 and the sliding sleeve 14 of the movable nozzle is also provided with a sealing plate 12, and the middle of the sealing plate 12 is provided with a rectangular through hole with the same size as the cross section of the sliding sleeve 14; the sealing plate 12 is fixedly connected with the lower end of the fixed plate 5 through a sealing bolt assembly 11.
The protruding part of the fixed disc is of a hollow non-circular pipe structure, preferably a rectangular pipe structure, and mainly has the functions of supporting the movable spray head to axially slide and guide, and the rigid load of the whole structure can be enhanced through the fixed connection of the sealing bolt component; the sealing plate can prevent the water jet nozzle assembly from being separated from the fixed disc to cause damage.
Wherein, the water jet spray head component 9 is hollow and is provided with a water jet channel 9.3; a water inlet 9.1 is formed in the protruding end of the water jet spray head assembly 9, an upper pipe body 9.2 is arranged between the water outlet 9.1 and the middle boss 9.4, a lower pipe body 9.5 is arranged below the middle boss 9.4, and a spray head outlet 9.8 is further formed in the bottom end of the lower pipe body 9.5; an abrasive material interface 9.6 is arranged on the side edge of the middle boss 9.4, and an abrasive material straight pipe 9.7 is connected to the abrasive material interface 9.6; the water inlet 9.1 is connected with the water jet pipeline 7, and the abrasive straight pipe 9.7 is connected with the abrasive hose 6; the upper end of the outer side of the fixed disc 5 is further provided with a bolt assembly 2, and the fixed disc is fixed on a cutter disc panel 1 through the bolt assembly.
The water jet nozzle assembly is of a hollow pipe type structure, the central position of the water jet nozzle assembly is a water jet channel penetrating through two ends of the water jet nozzle assembly, the middle position of the water jet nozzle assembly is provided with a middle boss, the upper surface of the middle boss is in contact with a spring and transmits the compression force of the spring, one side of the middle boss is fixedly connected with the abrasive interface and used for conveying abrasive into the water jet channel at the central position when the abrasive jet flows, and the fixed disc and the cutter disc panel are tightly fixed together through the bolt assembly, so that the integral rigid load.
Correspondingly, the invention also provides an arrangement method of the water jet nozzle device suitable for assisting the hob to break rock, which comprises the following steps:
in the first scheme, 1 water jet nozzle device is arranged on the same side of each hob;
the rock cutting seam of the water jet nozzle device is positioned between the rolling tracks of the two adjacent hobs; a water jet spray head device is arranged in front of each hob side along the rotation direction of the cutter head and is arranged on a lancing track at one side close to the center or far away from the center; arranging the hobs with adjacent hob tracks with a phase angle difference of beta, wherein the hobs positioned at the rear side have an angle range of beta in one rotation from the rotating direction of the cutterhead, the angle range is a single-side lancing auxiliary rock breaking mode, and the angle range of 2 pi-beta is a double-side lancing auxiliary rock breaking mode;
in the second scheme, 1 water jet spray head device is arranged on each of two sides of each hob;
the rock cutting seam of the water jet nozzle device is positioned between the rolling tracks of the two adjacent hobs; along the rotation direction of the cutter head, a water jet nozzle is uniformly arranged on the cutting track of the water jet nozzle devices adjacent to the two sides of each hob, 2 sets of water jet nozzle devices are arranged on the rolling track of each hob, half of the water jet nozzle devices are required to be continuously started in the time of one circle of rotation of the cutter head, and the other half of the water jet nozzles are required to be started and closed according to the arrangement phase angle difference of the hobs; the phase difference between the hob and the adjacent hob is beta, after the adjacent hob rotates by a beta angle after each rotation, the water jet nozzle device of the adjacent hob close to one side of the hob is closed, and when the adjacent hob completes one rotation and starts the next rotation to break rock circulation, the water jet nozzle device of the adjacent hob close to one side of the hob is opened, and the operation is circulated.
Due to the limitation of the structure and space of the cutter head, only one hob is generally mounted on each hob track of the cutter head, and due to the fact that the hob structure and the cutter base are large in size, the hobs of adjacent rolling tracks generally cannot be arranged side by side in the radial direction, but need to be staggered by a certain angle, such as 90 degrees and 180 degrees. Therefore, the distribution of the start positions of the hobs on the track of each hob is more dispersed. In order to realize the rock breaking effect of the water jet lancing auxiliary hob, on the basis that each arrangement mode guarantees the lancing auxiliary effect, in order to reduce energy consumption, the control mode of the valve opening time is different, as shown in fig. 8, the embodiment of the invention provides a specific arrangement method of a water jet nozzle device on a cutter head, which is suitable for assisting the hob to break rock, and specifically comprises the following steps:
1 water jet spray head device is arranged on the same side of each hob; the water jet rock cutting seam 21 is positioned between two adjacent hob rolling tracks 23. A water jet nozzle device 25 is arranged in front of each hob 19 at a certain distance along the rotation direction of the cutter head, and the nozzles are all arranged on the cutting seam track at the side close to the center or far from the center, and the nozzles are advanced by the distance which is convenient for installing the water jet nozzle device 25. The number of the water jet nozzle devices 25 required to be installed on the whole cutterhead is the same as that of the hob cutters 19 required to be assisted, and if all the hob cutters need to be cut to assist in rock breaking, the number of the water jet nozzle devices is equal to that of the hob cutters installed on the cutterhead. Under the arrangement mode, the slotting assisted rock breaking mode obtained by the hob on each hob track comprises a single-side slotting assisted rock breaking mode and a double-side slotting assisted rock breaking mode, when the arrangement phase angle of the hobs on the adjacent hob tracks is different from beta, the hob positioned on the rear side in the rotation direction of the hob disk has a beta angle range in one rotation, namely the single-side slotting assisted rock breaking mode, and the hob positioned on the rear side in the rotation direction of the hob disk has a2 pi-beta angle range, namely the double-side slotting assisted rock breaking mode. This mode should ensure that the cutter head is rotating in the correct direction during use, i.e., in the direction that the waterjet head leads the hob. All the water jet nozzle devices 25 are opened and closed by automatically controlling a water jet electric control valve 27 and an abrasive electric control valve 28 by programs.
As shown in fig. 9, an embodiment of the present invention provides a specific arrangement method of a water jet nozzle device on a cutter head, which is suitable for assisting a hob to break rock, specifically:
1 water jet spray head device is arranged on each of two sides of each hob; the water jet rock cutting seam 21 is positioned between two adjacent hob rolling tracks 23. Along the rotation direction of the cutter head, a water jet spray head device 25 is uniformly arranged on the water jet lancing tracks adjacent to the two sides of each hob 19, the spray heads are uniformly arranged at positions which are ahead of the hob in a certain distance, and the water jet spray head device 25 is ahead of the hob 19 in distance so as to be convenient for installing the water jet spray head device 25. The number of the water jet nozzle devices 25 required to be installed on the whole cutterhead is twice of the number of the hob cutters 19 required to be assisted, and if all the hob cutters need to be cut to assist in rock breaking, the number of the water jet nozzle devices 25 is equal to twice of the number of the hob cutters installed on the cutterhead. Under the arrangement mode, the hob on each hob track can obtain the bilateral lancing auxiliary rock breaking mode in real time without being influenced by the arrangement phase angle beta of the hob. This mode should also ensure that the cutter head is rotating in the correct direction during use, i.e., in the direction that the waterjet head leads the hob. Under the arrangement mode, 2 sets of water jet spray head devices 25 are arranged on each hob rolling track, so that all the water jet spray head devices 25 do not need to be started in real time within one circle of rotation of the cutter head, but half of the water jet spray head devices 25 need to be continuously started, the other half of the water jet spray head devices can be started and closed according to the arrangement phase angle difference of the hobs, and because the phase difference of each hob relative to the hob close to the track is different, the starting and relation time of the water jet spray head devices 25 which are positioned in front of each hob and do not need to be started in real time are different. As shown in fig. 9, a demonstration hob 19.1, a hob a19.2 and a hob B19.3 are provided on the hob a19.2, a water jet nozzle B25.3 and a water jet nozzle C25.4 are provided on the hob B19.3, a water jet nozzle 25.1 and a water jet nozzle a25.2 are provided on the hob B19.3, the hob a19.2 and the hob B19.3 are adjacent track hobs and have a phase difference of β, when the hob B19.3 rotates by an angle of β after each rotation starts, the water jet nozzle a25.2 on the side of the hob B19.3 adjacent to the hob a19.2 can be closed, and when the hob B19.3 completes one rotation and starts the next rock breaking cycle, the water jet nozzle a25.2 is opened again. All the water jet nozzle devices 25 are opened and closed by automatically controlling a water jet electric control valve 27 and an abrasive electric control valve 28 by programs.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A water jet device suitable for assisting hobbing cutter in rock breaking is characterized by comprising:
the fixing device comprises a fixing base, a fixing disc and a fixing disc, wherein the outer side of the fixing base is provided with the fixing disc, the lower part of the fixing disc is a rectangular protrusion, and the center of the fixing disc is provided with a T-shaped channel; the upper end of the T-shaped channel is round, and the lower end of the T-shaped channel is rectangular; the upper end of the T-shaped channel is provided with a disc-shaped spring base with a protruding lower part, the center of the spring base is provided with a circular through hole, and the protruding part of the lower part of the spring base is matched with the rectangular channel of the T-shaped channel; an adjusting base plate is arranged between the outer side of the spring base and the fixed disc, a base bolt assembly is arranged at the upper end of the outer side of the spring base, one end of the base bolt assembly is located at the upper end of the outer side of the spring base, and the other end of the base bolt assembly penetrates through the adjusting base plate and is located in the fixed disc;
the movable spray head is positioned in the lower side of the T-shaped channel in the center of the fixed disc; the movable spray head is characterized in that a water jet spray head component is arranged in the center of the movable spray head, a protrusion is arranged on the outer side of one end of the water jet spray head component and is positioned above the spring base, the other end of the water jet spray head component penetrates through a circular through hole in the center of the spring base and penetrates through the T-shaped channel to be discharged, an annular middle boss is arranged in the middle of the water jet spray head component, a spring is sleeved between the middle boss and the annular protrusion, a hollow rectangular protective sleeve is wrapped on the outer side of the water jet spray head component at the lower end of the middle boss, a hollow rectangular sliding sleeve is wrapped on the outer side of the protective sleeve, the sliding sleeve is matched and movably connected with the inner wall of the;
the following roller is fixedly connected to the outer side of the sliding sleeve through a roller shaft, and the roller shaft can be movably connected with a roller;
the water jet pipeline is positioned above the movable spray head and comprises a water jet pipeline and an abrasive hose; one end of the water jet pipeline is connected with the water jet spray head assembly, and the other end of the water jet pipeline is provided with a water jet electric control valve; one end of the abrasive hose is connected with the water jet spray head assembly, and the other end of the abrasive hose is provided with an abrasive electric control valve.
2. A water jet nozzle device suitable for assisting the hob in breaking rock according to claim 1, wherein a sealing plate is further arranged at the joint of the lower end of the fixed disc and the sliding sleeve of the movable nozzle, and a rectangular through hole with the same size as the cross section of the sliding sleeve is formed in the middle of the sealing plate.
3. A water jet nozzle device suitable for assisting the rock breaking of a hob according to claim 2, wherein the sealing plate is fixedly connected with the lower end of the fixed disc through a sealing bolt assembly.
4. A water jet assembly adapted to assist in breaking rock with a hob according to claim 1 wherein said water jet assembly is hollow and has a water jet channel; a water inlet is formed in the protruding end of the water jet spray head assembly, an upper pipe body is arranged between the water outlet and the middle boss, a lower pipe body is arranged below the middle boss, and a spray head outlet is further formed in the bottom end of the lower pipe body; the grinding material straight pipe is connected to the grinding material interface.
5. A water jet spray head device suitable for assisting in rock breaking with a hob according to claim 4, characterized in that the water outlet is connected with the water jet pipe, and the straight abrasive pipe is connected with the abrasive hose.
6. A water jet spray head device suitable for assisting the hob in breaking rock according to claim 1, wherein a bolt assembly is further arranged at the upper end of the outer side of the fixed disk, and the fixed disk is fixed on a cutterhead panel through the bolt assembly.
7. A method of arranging a water jet nozzle apparatus as claimed in claim 1, comprising: 1 water jet nozzle device is arranged on the same side of each hob;
rock cutting seams generated by the water jet nozzle device are positioned between two adjacent hob rolling tracks; along the rotating direction of the cutter head, a water jet spray head device is arranged in front of each hob side and is arranged on a cutting track close to the center of the cutter head or far away from the center of the cutter head; the angle difference beta of the phase positions of the hobs on the tracks of the adjacent hobs is arranged, the spray head is opened in the whole course to perform the cutting, and all the hobs start to break the rock simultaneously when the cutter head starts to rotate the rock, so that the hobs which have the phase angle difference beta and are positioned at the rear side are seen from the rotation direction of the cutter head, the angle range of the angle beta in one rotation is a single-side cutting seam auxiliary rock breaking mode, and the range of 2 pi-beta is a double-side cutting seam auxiliary rock breaking mode.
8. The arrangement method of water jet nozzle devices according to claim 7, further comprising arranging 1 of the water jet nozzle devices on both sides of each hob;
the rock cutting seam of the water jet nozzle device is positioned between the rolling tracks of the two adjacent hobs; along the cutter head direction of rotation, a water jet spray head is evenly arranged on the cutting track of the water jet spray head device adjacent to the two sides of each hob, 2 sets of water jet spray head devices are arranged on the rolling track of each hob, the hob can be in the rock breaking mode assisted by the cutting of the two sides at any time, and the concrete operation mode is as follows:
half a quantity of water jet spray head devices need to be continuously opened within the time of one circle of rotation of the cutter head, the other half quantity of water jet spray heads can be opened and closed according to the arrangement phase angle of each hob, and the specific operation requirements are as follows: and when the adjacent hob finishes one rotation and begins the next rock breaking cycle, all the closed water jet nozzle devices are opened, and the cycle operation is carried out.
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| CN202010403275.5A CN111577305B (en) | 2020-05-13 | 2020-05-13 | Water jet nozzle device suitable for assisting hob to break rock and arrangement method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112483105A (en) * | 2020-11-04 | 2021-03-12 | 中国科学院武汉岩土力学研究所 | Rock breaking method of inner and outer cutter heads TBM (Tunnel boring machine) based on pulse jet flow and point treatment |
| CN112610235A (en) * | 2020-12-24 | 2021-04-06 | 中国铁建重工集团股份有限公司 | Plug-and-play type water jet auxiliary rock breaking equipment suitable for TBM |
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| CN111577305B (en) | 2021-06-22 |
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