CN113756826B - Method for repairing screw hole of normal-pressure cutter head cutter barrel of slurry balance shield tunneling machine - Google Patents
Method for repairing screw hole of normal-pressure cutter head cutter barrel of slurry balance shield tunneling machine Download PDFInfo
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- CN113756826B CN113756826B CN202111148028.6A CN202111148028A CN113756826B CN 113756826 B CN113756826 B CN 113756826B CN 202111148028 A CN202111148028 A CN 202111148028A CN 113756826 B CN113756826 B CN 113756826B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000002002 slurry Substances 0.000 title claims abstract description 20
- 230000005641 tunneling Effects 0.000 title claims description 14
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 238000010276 construction Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000008439 repair process Effects 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 12
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 12
- 235000017491 Bambusa tulda Nutrition 0.000 description 12
- 241001330002 Bambuseae Species 0.000 description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 12
- 239000011425 bamboo Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 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
- 125000006850 spacer group Chemical group 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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a method for repairing a screw hole of a cutter drum of a normal-pressure cutter head of a slurry balance shield machine, which comprises the following steps: firstly, cleaning and fixing a to-be-repaired knife cylinder; secondly, installing a positioning tool; thirdly, drilling and dismantling the positioning tool; fourthly, repairing the screw hole to be repaired; and fifthly, plugging the repaired screw hole. According to the invention, the tool cylinder to be repaired is reversely fixed on the drilling machine, the screw hole to be repaired is repaired from the reverse side of the fixed end head of the tool apron, the maintenance process is simple, the possibility of damaging and repairing again and even scrapping the tool cylinder caused by the old repair process is avoided, and a large amount of time cost and capital cost can be saved; meanwhile, the positioning tool is used for determining the position of the screw hole from the reverse side of the fixed end of the tool apron, so that the repairability of the tool barrel is improved on the premise that the tool barrel to be repaired is not damaged, the reliability and the service life of the tool barrel are further improved, and the later-stage construction risk is reduced.
Description
Technical Field
The invention belongs to the technical field of shield machine maintenance, and particularly relates to a method for repairing a cutter drum screw hole of a normal-pressure cutter head of a slurry balance shield machine.
Background
The shield machine is used for tunneling in complex geology, the requirement on the operation level of a construction unit is high, and the durability of the shield machine is greatly tested. The cutter head of the shield machine bears the main work of tunnel excavation and bears huge vibration and pressure. These vibrations and pressure have all transmitted on the blade holder connecting bolt in the ordinary pressure sword section of thick bamboo, and the tunnelling in-process, cutter wearing and tearing and abnormal damage can not avoid, and blade holder fixing bolt can appear partly bolt looseness owing to vibrations and pressure and drop and disconnected silk, damages the interior silk of sword section of thick bamboo bolt hole, causes the condition that the sword section of thick bamboo can not be used.
The commonly used repair methods at present are: one is to carry out re-tapping on the damaged threads in the bolt holes, and the bolt holes processed by the method basically have the conditions of thread breakage and bolt unremovable in the using process; the other method is to perform reaming and tapping on the bolt hole and process and install the screw sleeve, and the method has the defects that the thickness of the screw sleeve is thick, the reaming diameter of the bolt hole is large, the wall thickness of the bolt hole in a partial area is thin, the screw sleeve cannot be repaired by a secondary method, and the screw sleeve is difficult to repair again when being damaged in the using process. Therefore, the traditional maintenance method needs to drill holes from the inside for maintenance, the drill rod needs more than one meter when the drill rod is repaired from the inside, the repaired hole is damaged, the maintenance is repeated, and the maintenance efficiency is low when the drill is modified when the drill rod is repaired.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for repairing a screw hole of a cutter cylinder of a normal-pressure cutter head of a slurry balance shield machine, aiming at the defects in the prior art, the cutter cylinder to be repaired is reversely fixed on a drilling machine, the screw hole to be repaired is repaired from the reverse side of the fixed end of the cutter seat, the maintenance process is simple, the possibility of secondary damage and maintenance and even cutter cylinder scrapping caused by the old repair process is avoided, and a large amount of time cost and capital cost can be saved; meanwhile, the positioning tool is used for determining the position of the screw hole from the reverse side of the fixed end of the tool apron, so that the repairability of the tool barrel is improved on the premise that the tool barrel to be repaired is not damaged, the reliability and the service life of the tool barrel are further improved, and the later-stage construction risk is reduced.
In order to solve the technical problems, the invention adopts the technical scheme that: the method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine is characterized by comprising the following steps of: the method comprises the following steps:
step one, cleaning and fixing a to-be-repaired knife cylinder: cleaning the outer surface of the knife cylinder to be repaired and the screw hole on the knife cylinder to be repaired; enabling a flange of the cutter cylinder to be repaired to face downwards and be placed on a drilling machine, adjusting the flatness of the cutter cylinder to be repaired to ensure that the flatness of the cutter cylinder to be repaired is not more than 0.5mm, and reversely fixing the cutter cylinder to be repaired on the drilling machine by utilizing a fixing piece;
step two, installing a positioning tool, wherein the process is as follows:
step 201, confirming the number and the positions of screw holes to be repaired on the fixed end of the tool apron, and horizontally installing a lower positioning plate at the bottom of the group of screw holes to be repaired, wherein the lower positioning plate is arranged on the inner side of the fixed end of the tool apron of the tool holder to be repaired; connecting the lower positioning plate and the tool apron fixing end by using a bolt; wherein the bolt is installed in the screw hole which does not need to be repaired;
202, vertically installing a connecting rod in a lower installation hole of the lower positioning plate, wherein the end part of the connecting rod is provided with an external thread, and the bottom of the connecting rod penetrates through the lower installation hole and then is fixed on the bottom surface of the lower positioning plate through a lower nut;
step 203, sleeving a protective sleeve on each connecting rod, wherein the height of each connecting rod is greater than that of each protective sleeve, and the height of each protective sleeve is greater than the vertical distance between the lower positioning plate and the top surface of the fixed end of the cutter holder;
step 204, horizontally installing an upper positioning plate at the top of the protective sleeve, enabling the top of the connecting rod to penetrate through an upper installation hole of the upper positioning plate, and fixing the upper positioning plate at the top of the protective sleeve by using an upper nut;
step three, drilling and dismantling the positioning tool, wherein the process is as follows:
301, a plurality of upper positioning holes are formed in the upper positioning plate, and the number of the upper positioning holes is equal to that of the screw holes to be repaired in the fixed end of the tool apron and corresponds to that of the screw holes to be repaired one by one; drilling the bottom of the tool apron fixing end by penetrating a drilling tool through the upper positioning hole according to the number and the position of the screw holes to be repaired determined in the step 201 to form a bottom hole; the bottom hole is communicated with a screw hole to be repaired on the fixed end of the tool apron;
step 302, after drilling is completed, screwing a nut, and removing the upper positioning plate; then the protective sleeve is dismantled, the lower nut is screwed, and the connecting rod is dismantled; finally, screwing the bolt, and removing the lower positioning plate to finish the removal of the positioning tool;
step four, repairing the screw hole to be repaired: reaming the bottom hole, and performing chamfering construction at the hole opening; tapping the machined bottom hole by using a screw tap, screwing a steel wire thread insert into the bottom hole after tapping is finished, so that the length of the steel wire thread insert entering the bottom hole is not less than 50mm, and the top of the steel wire thread insert is lower than the top surface of the fixed end of the tool apron;
step five, plugging the repaired screw hole: a solid plug is placed into the bottom hole, and the length of the solid plug extending into the bottom hole is not less than 20 mm; and plugging the joint of the solid plug and the tool apron fixing end of the tool barrel to be repaired.
The method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield machine is characterized by comprising the following steps of: in step 201, a plurality of lower positioning holes for installing the bolts are formed in the lower positioning plate, and the number of the lower positioning holes is equal to that of the upper positioning holes and corresponds to that of the upper positioning holes one to one; and flat pads are horizontally arranged between the lower positioning plate and the tool apron fixing end and between the upper positioning plate and the tool apron fixing end.
The method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine is characterized by comprising the following steps of: the lower positioning plate is provided with a plurality of lower mounting holes for mounting the connecting rods, and the plurality of lower mounting holes are distributed along the circumferential direction of the lower positioning plate; the upper positioning plate is provided with a plurality of upper mounting holes matched with the lower mounting holes, and the plurality of upper mounting holes are distributed along the circumferential direction of the upper positioning plate.
The method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine is characterized by comprising the following steps of: the upper positioning plate and the lower positioning plate are both provided with through holes for the hydraulic wear probes to pass through, and the through holes are distributed in an area defined by the lower positioning holes or the upper positioning holes.
The method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield machine is characterized by comprising the following steps of: and gaskets are respectively arranged between the upper positioning plate and the upper nut and between the lower positioning plate and the lower nut. The method for repairing the screw hole of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine is characterized by comprising the following steps of: and fifthly, when the joint of the solid plug and the fixed end of the tool apron is plugged, glass cement is adopted, or the solid plug and the fixed end of the tool apron are welded and fixed.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the tool cylinder to be repaired is reversely fixed on the drilling machine, the screw hole to be repaired is repaired from the reverse side of the fixed end of the tool apron, the maintenance process is simple, the possibility of secondary damage and maintenance and even tool cylinder scrapping caused by the old repair process is avoided, and a large amount of time cost and capital cost can be saved.
2. According to the tool holder, the position of the screw hole is determined from the reverse side of the fixed end of the tool holder by using the positioning tool, so that the repairability of the tool holder is improved on the premise of not damaging the tool holder to be repaired, the reliability and the service life of the tool holder are further improved, and the later-stage construction risk is reduced.
3. When the lower positioning plate is installed, the lower positioning plate is fixed by using the screw holes which do not need to be repaired, and the knife cylinder to be repaired is reasonably utilized on the premise of not additionally punching and increasing a separate fixing device, so that the repairing process is simplified, and the repairing efficiency is improved.
4. According to the invention, the height of the protective sleeve sleeved on each connecting rod is greater than the vertical distance between the lower positioning plate and the top surface of the cutter holder fixing end, so that the upper positioning plate and the cutter holder fixing end are not contacted, and the precision of the screw hole is ensured in the subsequent repair process of the screw hole.
5. The invention plugs the end part of the repaired screw hole, can prevent slurry entering the screw hole from being corroded, and prolongs the service life of the bolt and the steel wire thread insert.
In conclusion, the tool cylinder to be repaired is reversely fixed on the drilling machine, the screw hole to be repaired is repaired from the reverse side of the fixed end head of the tool apron, the maintenance process is simple, the possibility of damaging and repairing the tool cylinder again and even scrapping the tool cylinder caused by the old repair process is avoided, and a large amount of time cost and capital cost can be saved; utilize simultaneously the location frock is followed the reverse side of blade holder fixed end is right the position of screw hole is confirmed, is not damaging under the prerequisite of treating to restore the sword section of thick bamboo, has increased the repairability of a sword section of thick bamboo, further increases the reliability and the life of a sword section of thick bamboo, reduces later stage construction risk.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the installation and positioning tool of the present invention in a construction state.
FIG. 2 is a schematic diagram showing the positional relationship among the upper positioning plate, the protective sleeve and the tool apron fixing end according to the present invention.
FIG. 3 is a schematic structural view of an upper positioning plate and a lower positioning plate of the present invention.
FIG. 4 is a flow chart of the present invention.
Description of reference numerals:
1, fixing an end socket of a tool apron; 2, positioning holes; 3, a lower positioning plate;
4, lower positioning holes; 5-lower mounting holes; 6-a connecting rod;
7, protecting the sleeve; 8, positioning a plate; 9-mounting holes;
10, screwing a nut; 11-a gasket; 12-a through hole;
13-flat cushion; 14-hydraulic wear probe.
Detailed Description
As shown in fig. 1 to 4, the method for repairing screw holes of a normal-pressure cutter head cutter drum of a slurry balance shield tunneling machine includes the following steps:
step one, cleaning and fixing a to-be-repaired knife cylinder: cleaning the outer surface of the knife cylinder to be repaired and the screw hole on the knife cylinder to be repaired; enabling a flange of the cutter cylinder to be repaired to face downwards and be placed on a drilling machine, adjusting the flatness of the cutter cylinder to be repaired to ensure that the flatness of the cutter cylinder to be repaired is not more than 0.5mm, and reversely fixing the cutter cylinder to be repaired on the drilling machine by utilizing a fixing piece;
step two, installing a positioning tool, wherein the process is as follows:
step 201, confirming the number and the positions of screw holes to be repaired on the fixed end socket 1 of the tool apron, and horizontally installing a lower positioning plate 3 at the bottom of the group of screw holes to be repaired, wherein the lower positioning plate 3 is arranged on the inner side of the fixed end socket 1 of the tool apron of the tool barrel to be repaired; connecting the lower positioning plate 3 with the tool apron fixing end 1 by using a bolt; wherein the bolt is installed in the screw hole which does not need to be repaired;
202, vertically installing a connecting rod 6 in a lower installation hole 5 of the lower positioning plate 3, wherein an external thread is arranged at the end part of the connecting rod 6, and the bottom of the connecting rod 6 passes through the lower installation hole 5 and then is fixed on the bottom surface of the lower positioning plate 3 through a lower nut;
step 203, sleeving a protective sleeve 7 on each connecting rod 6, wherein the height of each connecting rod 6 is greater than that of each protective sleeve 7, and the height of each protective sleeve 7 is greater than the vertical distance between the lower positioning plate 3 and the top surface of the tool apron fixing end 1;
step 204, horizontally installing an upper positioning plate 8 on the top of the protective sleeve 7, enabling the top of the connecting rod 6 to penetrate through an upper installation hole 9 of the upper positioning plate 8, and fixing the upper positioning plate 8 on the top of the protective sleeve 7 by using an upper nut 10;
step three, drilling and dismantling the positioning tool, wherein the process is as follows:
301, a plurality of upper positioning holes 2 are formed in the upper positioning plate 8, and the number of the plurality of upper positioning holes 2 is equal to the number of the screw holes to be repaired in the tool apron fixing end 1 and corresponds to the number of the screw holes to be repaired one by one; drilling the bottom of the tool apron fixing end 1 by using a drilling tool to penetrate through the upper positioning hole 2 according to the number and the position of the screw holes to be repaired determined in the step 201 to form a bottom hole; the bottom hole is communicated with a screw hole to be repaired on the fixed end socket 1 of the tool apron;
step 302, after drilling is completed, screwing up a nut 10, and removing the upper positioning plate 8; then the protective sleeve 7 is removed, the lower nut is screwed, and the connecting rod 6 is removed; finally, screwing the bolt, and removing the lower positioning plate 3 to finish the removal of the positioning tool;
step four, repairing the screw hole to be repaired: reaming the bottom hole, and performing chamfering construction at the hole opening; tapping the machined bottom hole by using a screw tap, screwing a steel wire thread insert into the bottom hole after tapping is finished, so that the length of the steel wire thread insert entering the bottom hole is not less than 50mm, and the top of the steel wire thread insert is lower than the top surface of the fixed end socket 1 of the tool apron;
step five, plugging the repaired screw hole: a solid plug is placed into the bottom hole, and the length of the solid plug extending into the bottom hole is not less than 20 mm; and plugging the joint of the solid plug and the tool apron fixing end 1 of the tool barrel to be repaired.
According to the invention, the tool cylinder to be repaired is reversely fixed on the drilling machine, the screw hole to be repaired is repaired from the reverse side of the tool apron fixing end 1, the maintenance process is simple, the possibility of damaging and repairing again and even scrapping the tool cylinder caused by the old repair process is avoided, and a large amount of time cost and capital cost can be saved.
According to the invention, the positioning tool is used for determining the position of the screw hole from the reverse side of the tool apron fixing end 1, so that the repairability of the tool cylinder is increased on the premise of not damaging the tool cylinder to be repaired, the reliability and the service life of the tool cylinder are further increased, and the later-stage construction risk is reduced.
When the lower positioning plate 3 is installed, the screw holes which do not need to be repaired are used for fixing, the knife cylinder to be repaired is reasonably used on the premise of not additionally punching and increasing a separate fixing device, the repairing process is simplified, and the repairing efficiency is improved.
According to the invention, the height of the protective sleeve 7 sleeved on each connecting rod 6 is larger than the vertical distance between the lower positioning plate 3 and the top surface of the to-be-repaired knife cylinder, so that the upper positioning plate 8 and the to-be-repaired knife cylinder are ensured not to be contacted, and the precision of the screw hole is ensured in the subsequent repair process of the screw hole.
The invention plugs the end part of the repaired screw hole, can prevent slurry entering the screw hole from being corroded, and prolongs the service life of the bolt and the steel wire thread insert.
During the in-service use, can be right treat that the surface of restoreing the sword section of thick bamboo clears up, clears up rust, impurity etc. in each screw hole simultaneously to the plane deformation to each screw hole department is polished, will after treating the clearance treat that the restoration sword section of thick bamboo is placed on the workstation of drilling machine, through the alignment flange, confirm treat the roughness of restoreing the sword section of thick bamboo, it is right to utilize clamping device on the drilling machine at last treat that the restoration sword section of thick bamboo carries out the centre gripping is fixed.
It should be noted that, connecting rod 6 is located down locating plate 3 with the cover is equipped with protective sheath 7 on the pole section between the top board 8, the restriction protective sheath 7 highly be in order to guarantee top board 8 with treat that repair a sword section of thick bamboo contactless, follow-up restoration the in-process of screw hole guarantees the precision of screw hole, preferably, connecting rod 6 surpasss treat that the vertical distance of the top surface of repairing a sword section of thick bamboo is 1 cm. Meanwhile, the protective sleeve 7 is installed to ensure that the upper positioning plate 8 and the lower positioning plate 3 are arranged in parallel, and the precision of the repaired screw hole is ensured on the other hand.
In actual use, when the bottom hole is reamed, the threaded hole of the cutter cylinder M27 in the front area is reamed to phi 27.8mm, the threaded hole of the cutter cylinder M24 in the center area is reamed to phi 24.9mm, the surface smoothness and roughness are 6.3 microns, and the position accuracy of the hole is ensured to meet the requirements of a drawing; when chamfering, the axial depth of the chamfer at the hole opening of the bottom hole is 3.5 mm; during tapping, the length of the tap needs to be larger than the thickness of the front end of the cutter cylinder by 110 mm. Particularly, when the solid plug is installed, thread fastening glue can be poured into the bottom hole, so that the threaded connection between the solid plug and the bottom hole is prevented from loosening, and the solid plug is locked and cannot loosen.
As shown in fig. 3, in step 201, in the present embodiment, a plurality of lower positioning holes 4 for installing the bolts are formed in the lower positioning plate 3, and the number of the lower positioning holes 4 is equal to the number of the upper positioning holes 2 and corresponds to one another; flat pads 13 are horizontally arranged between the lower positioning plate 3 and the tool apron fixing end socket 1 and between the upper positioning plate 8 and the tool apron fixing end socket 1.
In actual use, the lower positioning plate 3 can be fixed in the tool cylinder to be repaired by combining the lower positioning hole 4 and the screw hole, so that a supporting foundation is provided for the subsequent installation of the positioning tool; meanwhile, the lower positioning plate 3 is installed through the existing screw hole in the tool cylinder to be repaired, so that the repairing steps are simplified, and the repairing efficiency is improved. A flat cushion 13 is horizontally arranged between the lower positioning plate 3 and the tool apron fixing end 1, so that the lower positioning plate 3 is prevented from directly contacting with the tool apron fixing end 1, and errors during repair can be reduced; the flat cushion 13 is horizontally arranged between the upper positioning plate 8 and the tool apron fixing end socket 1, so that the upper positioning plate 8 is prevented from directly contacting with the tool apron fixing end socket 1, and errors during repair can be reduced.
During the in-service use, the distribution condition of the screw hole on the blade holder fixed end 1 has two kinds, and in order to satisfy the repair condition of the screw hole of these two kinds of different distribution types, the location frock that uses under two kinds of distribution conditions is distinguished, and the difference lies in two kinds in the location frock lower locating hole 4 on the lower locating plate 3 with the position of last locating hole 2 on the last locating plate 8 is different, and the position of locating hole is confirmed according to the position of corresponding screw hole.
As shown in fig. 3, in the present embodiment, a plurality of lower mounting holes 5 for mounting the connecting rods 6 are formed in the lower positioning plate 3, and the plurality of lower mounting holes 5 are arranged along the circumferential direction of the lower positioning plate 3; the upper positioning plate 8 is provided with a plurality of upper mounting holes 9 matched with the lower mounting holes 5, and the plurality of upper mounting holes 9 are distributed along the circumferential direction of the upper positioning plate 8.
As shown in fig. 3, in the present embodiment, through holes 12 for allowing a hydraulic wear probe 14 to pass through are formed in both the upper positioning plate 8 and the lower positioning plate 3, and the through holes 12 are arranged in an area surrounded by the plurality of lower positioning holes 4 or an area surrounded by the plurality of upper positioning holes 2.
As shown in fig. 2, in the present embodiment, a spacer 11 is installed between the upper positioning plate 8 and the upper nut 10, and between the lower positioning plate 3 and the lower nut. In actual use, the gasket 11 is installed to prevent abrasion of the upper positioning plate 8.
In this embodiment, in the fifth step, when the joint between the solid plug and the tool apron fixing end 1 is plugged, glass cement is used, or the solid plug and the tool apron fixing end 1 are welded and fixed.
During the in-service use, can carry out the surfacing welding in the junction of the two, polish smoothly after the welding is accomplished, wherein the thickness of surfacing is not less than 10 mm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A method for repairing a screw hole of a cutter drum of a normal-pressure cutter of a slurry balance shield tunneling machine is characterized by comprising the following steps:
step one, cleaning and fixing a to-be-repaired knife cylinder: cleaning the outer surface of the knife cylinder to be repaired and the screw hole on the knife cylinder to be repaired; enabling a flange of the cutter cylinder to be repaired to face downwards and be placed on a drilling machine, adjusting the flatness of the cutter cylinder to be repaired to ensure that the flatness of the cutter cylinder to be repaired is not more than 0.5mm, and reversely fixing the cutter cylinder to be repaired on the drilling machine by utilizing a fixing piece;
step two, installing a positioning tool, wherein the process is as follows:
step 201, confirming the number and the positions of screw holes to be repaired on a fixed end socket (1) of a tool apron, and horizontally installing a lower positioning plate (3) at the bottom of the screw holes to be repaired, wherein the lower positioning plate (3) is arranged on the inner side of the fixed end socket (1) of the tool apron of a tool barrel to be repaired; connecting the lower positioning plate (3) with the tool apron fixing end socket (1) by using a bolt; wherein the bolt is installed in the screw hole which does not need to be repaired;
202, vertically installing a connecting rod (6) in a lower installation hole (5) of the lower positioning plate (3), wherein an external thread is arranged at the end part of the connecting rod (6), and the bottom of the connecting rod (6) penetrates through the lower installation hole (5) and then is fixed on the bottom surface of the lower positioning plate (3) through a lower nut;
step 203, sleeving a protective sleeve (7) on each connecting rod (6), wherein the height of each connecting rod (6) is greater than that of each protective sleeve (7), and the height of each protective sleeve (7) is greater than the vertical distance between the lower positioning plate (3) and the top surface of the cutter holder fixing end (1);
204, horizontally installing an upper positioning plate (8) at the top of the protective sleeve (7), enabling the top of the connecting rod (6) to penetrate through an upper installation hole (9) of the upper positioning plate (8), and fixing the upper positioning plate (8) at the top of the protective sleeve (7) by using an upper nut (10);
step three, drilling and dismantling the positioning tool, wherein the process is as follows:
301, a plurality of upper positioning holes (2) are formed in the upper positioning plate (8), and the number of the upper positioning holes (2) is equal to that of the screw holes to be repaired in the tool apron fixing end (1) and corresponds to that of the screw holes to be repaired one by one; drilling the bottom of the tool apron fixing end (1) by using a drilling tool to penetrate through the upper positioning hole (2) according to the number and the position of the screw holes to be repaired determined in the step 201 to form a bottom hole; the bottom hole is communicated with a screw hole to be repaired on the fixed end socket (1) of the tool apron;
step 302, after drilling is completed, screwing a nut (10) and removing the upper positioning plate (8); then the protective sleeve (7) is removed, the lower nut is screwed, and the connecting rod (6) is removed; finally, screwing the bolt, and disassembling the lower positioning plate (3) to finish the disassembly of the positioning tool;
step four, repairing the screw hole to be repaired: reaming the bottom hole, and performing chamfering construction at the hole opening; tapping the processed bottom hole by using a screw tap, screwing a steel wire thread insert into the bottom hole after tapping is finished, so that the length of the steel wire thread insert entering the bottom hole is not less than 50mm, and the top of the steel wire thread insert is lower than the top surface of the fixed end (1) of the tool apron;
step five, plugging the repaired screw hole: a solid plug is placed into the bottom hole, and the length of the solid plug extending into the bottom hole is not less than 20 mm; and plugging the joint of the solid plug and the tool apron fixing end (1) of the tool barrel to be repaired.
2. The method for repairing screw holes of the cutter drum of the normal-pressure cutter of the slurry balance shield tunneling machine according to claim 1, which is characterized in that: in step 201, a plurality of lower positioning holes (4) for installing the bolts are formed in the lower positioning plate (3), and the number of the lower positioning holes (4) is equal to that of the upper positioning holes (2) and corresponds to that of the upper positioning holes one by one; and flat pads (13) are horizontally arranged between the lower positioning plate (3) and the cutter holder fixing end (1) and between the upper positioning plate (8) and the cutter holder fixing end (1).
3. The method for repairing screw holes of the cutter drum of the normal-pressure cutter of the slurry balance shield tunneling machine according to claim 1, which is characterized in that: a plurality of lower mounting holes (5) for mounting the connecting rods (6) are formed in the lower positioning plate (3), and the plurality of lower mounting holes (5) are distributed along the circumferential direction of the lower positioning plate (3); a plurality of upper mounting holes (9) matched with the lower mounting holes (5) are formed in the upper positioning plate (8), and the plurality of upper mounting holes (9) are distributed along the circumferential direction of the upper positioning plate (8).
4. The method for repairing screw holes of the cutter drum of the normal-pressure cutter of the slurry balance shield tunneling machine according to claim 2, characterized by comprising the following steps: the upper positioning plate (8) and the lower positioning plate (3) are respectively provided with a through hole (12) for a hydraulic wear probe (14) to pass through, and the through holes (12) are arranged in an area defined by the lower positioning holes (4) or an area defined by the upper positioning holes (2).
5. The method for repairing screw holes of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine according to claim 1, which is characterized in that: and gaskets (11) are respectively arranged between the upper positioning plate (8) and the upper nut (10) and between the lower positioning plate (3) and the lower nut.
6. The method for repairing screw holes of the cutter drum of the normal-pressure cutter head of the slurry balance shield tunneling machine according to claim 1, which is characterized in that: and step five, when the joint of the solid plug and the tool apron fixing end (1) is plugged, glass cement is adopted, or the solid plug and the tool apron fixing end (1) are welded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148028.6A CN113756826B (en) | 2021-09-29 | 2021-09-29 | Method for repairing screw hole of normal-pressure cutter head cutter barrel of slurry balance shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148028.6A CN113756826B (en) | 2021-09-29 | 2021-09-29 | Method for repairing screw hole of normal-pressure cutter head cutter barrel of slurry balance shield tunneling machine |
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| Publication Number | Publication Date |
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| CN113756826A CN113756826A (en) | 2021-12-07 |
| CN113756826B true CN113756826B (en) | 2022-07-12 |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911590A (en) * | 2006-08-31 | 2007-02-14 | 中国南车集团戚墅堰机车车辆厂 | Fast repairing method of internal screw |
| JP5299215B2 (en) * | 2009-10-20 | 2013-09-25 | 新日鐵住金株式会社 | Bolt hole repair method and repair device for shaft coupling |
| CN202108519U (en) * | 2011-07-01 | 2012-01-11 | 无锡盾建重工制造有限公司 | Cutter box installation structure of tip teeth for shield machines |
| US8601663B2 (en) * | 2012-02-13 | 2013-12-10 | Honeywell International Inc. | Methods for structural repair of components having damaged internally threaded openings and components repaired using such methods |
| CN202726410U (en) * | 2012-06-29 | 2013-02-13 | 江阴市振江钢结构有限公司 | Mechanism for repairing internal threads of threaded holes |
| CN105798405B (en) * | 2016-05-20 | 2018-05-04 | 中车唐山机车车辆有限公司 | Threaded hole restorative procedure and device |
| CN208374619U (en) * | 2018-04-28 | 2019-01-15 | 首钢京唐钢铁联合有限责任公司 | A kind of threaded hole prosthetic device |
| CN108747197A (en) * | 2018-05-31 | 2018-11-06 | 中建八局轨道交通建设有限公司 | Cutter head of shield machine panel repairs structure and restorative procedure |
| CN108907374A (en) * | 2018-08-10 | 2018-11-30 | 常州博瑞电力自动化设备有限公司 | A kind of through hole whorl restorative procedure |
| CN111618382A (en) * | 2020-05-20 | 2020-09-04 | 福建福清核电有限公司 | Steam generator eyelet threaded hole repairing device and method |
| CN112453825A (en) * | 2020-11-19 | 2021-03-09 | 中车大连机车车辆有限公司 | C-grade steel thin-wall threaded hole repairing method |
| CN112916968B (en) * | 2021-01-29 | 2023-02-10 | 共享装备股份有限公司 | Threaded hole repairing method |
| CN113333877B (en) * | 2021-06-01 | 2022-12-23 | 四川航天长征装备制造有限公司 | Detachable variable-diameter reverse thread repairing device |
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