CN109236306B - Safety redundancy mechanism for preventing replaceable cutter under normal pressure from falling off and installation method thereof - Google Patents
Safety redundancy mechanism for preventing replaceable cutter under normal pressure from falling off and installation method thereof Download PDFInfo
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- CN109236306B CN109236306B CN201811213528.1A CN201811213528A CN109236306B CN 109236306 B CN109236306 B CN 109236306B CN 201811213528 A CN201811213528 A CN 201811213528A CN 109236306 B CN109236306 B CN 109236306B
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- knife
- barrel
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- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 27
- 238000009434 installation Methods 0.000 title claims description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000009412 basement excavation Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 11
- 230000005641 tunneling Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
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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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a safe redundant mechanism for preventing a replaceable cutter under normal pressure from falling off, which comprises: the cover plate is arranged at the end part, far away from the cutter, of the cutter barrel in a blocking mode, and a gap is reserved between the cover plate and the end part, far away from the cutter, of the cutter barrel; and the fastening connecting piece is fixedly connected with the cover plate, and the cover plate is fixedly connected with the knife box for installing the knife barrel through the fastening connecting piece. According to the invention, the cover plate is used for blocking the cutter barrel, so that even if the bolt of the cutter barrel is broken and the cutter barrel is popped backwards, the cutter barrel can be blocked by the cover plate, the cutter barrel cannot be separated from the cutter box, the muddy water is prevented from being filled, and the risk that the cutter barrel is separated from the tool box and is popped out to submerge the flange tank is effectively avoided. A gap is reserved between the cover plate and the cutter barrel, so that the cutter barrel can be ejected backwards for a distance, the cutter barrel is not contacted with an excavation surface, the cutter barrel is not stressed any more, and the fastening connecting piece for pulling the cover plate can be prevented from being stressed and broken again.
Description
Technical Field
The invention relates to the field of shield construction, in particular to a safe redundant mechanism for preventing a replaceable cutter under normal pressure from falling off and an installation method thereof.
Background
In recent years, with the further acceleration of urbanization process, shield construction is increasingly widely applied to subway construction with the advantages of safety, rapidness, high automation, small interference to the periphery of a construction line and the like. The development of shield structure technique is also the difference day by day, in recent years, tens of internal extra large diameter shield structure machines that add flange jar and be equipped with the removable blade disc of ordinary pressure have been set up to domestic, often can meet complicated geological structure, the shield structure machine has not avoided tool changing work in long distance tunnelling, influenced by abominable geological conditions, must frequently carry out the tool changing, the phenomenon that the removable scraper knife bucket fixing bolt of ordinary pressure is broken on the blade disc is becoming more and more serious, cold is defended and just takes place the pull-off of scraper knife bucket fixed screw, the blade bucket drops and pops out the accident that the knife case leads to the flange jar to submerge, can submerge the tunnel even when the condition is serious, it is just like an untimely bomb, there is very big potential safety hazard.
The condition that the cutter barrel falls off from the cutter head mounting position and a large amount of muddy water flows into the flange tank due to the breakage of the fixing bolt of the normal-pressure replaceable cutter barrel during the construction process of a plurality of projects. At the moment, the flange tank door needs to be closed in time to prevent muddy water from submerging the tunnel; and then, a professional air pressure worker is required to enter the flange tank to stop the leakage. The accident and the handling process have two safety risks of tunnel submergence and construction operation under high pressure. From the accident treatment to the shield machine propulsion recovery, the time consumption is generally about 5 days, and the construction progress is greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a safe redundant mechanism for preventing a replaceable cutter under normal pressure from falling off, and solves the problems that muddy water is gushed into a flange tank due to the fact that a fixing screw of an existing cutter barrel is easy to break, two safety risks of tunnel submergence and high-pressure construction operation exist, construction progress is influenced, and the like.
The technical scheme for realizing the purpose is as follows:
the invention provides a safe redundant mechanism for preventing a replaceable cutter under normal pressure from falling off, which comprises:
the cover plate is arranged at the end part, far away from the cutter, of the cutter barrel in a blocking mode, and a gap is reserved between the cover plate and the end part, far away from the cutter, of the cutter barrel; and
and the fastening connecting piece is tightly connected with the cover plate, and the cover plate is tightly connected with the knife box for installing the knife barrel through the fastening connecting piece.
According to the invention, the cover plate is used for blocking the cutter barrel, so that even if the bolt of the cutter barrel is broken and the cutter barrel is popped backwards, the cutter barrel can be blocked by the cover plate, the cutter barrel cannot be separated from the cutter box, the muddy water is prevented from being filled, and the risk that the cutter barrel is separated from the tool box and is popped out to submerge the flange tank is effectively avoided. A gap is reserved between the cover plate and the cutter barrel, so that the cutter barrel can be ejected backwards for a distance, the cutter barrel is not contacted with an excavation surface, the cutter barrel is not stressed any more, and the fastening connecting piece for pulling the cover plate can be prevented from being stressed and broken again. After the cutter barrel bolt is broken, the cutter barrel is blocked by the cover plate, the processing is also convenient and efficient, the cutter barrel normal-pressure cutter changing tool is only required to be installed, the jack is retracted to draw out the cutter barrel, a cutter box gate is closed, the cutter barrel fixing bolt is replaced, the propulsion can be recovered, the situation that the processing problem occurs to the situation that the propulsion is recovered can be completed in less than 4 hours, the risk of blocking leakage of a worker entering a warehouse after the flange tank is submerged is fundamentally avoided, meanwhile, the actual situation of processing dangerous situations is greatly saved, and the construction period, equipment and labor cost are saved.
The safety redundancy mechanism is further improved in that a flange plate is arranged at the end part, far away from the cutter, of the cutter box;
the cover plate is provided with a through hole corresponding to the connecting hole on the flange plate;
the fastening connecting piece is a connecting bolt, the connecting bolt penetrates through the through hole in the cover plate and the connecting hole in the flange plate and is in threaded connection with a connecting nut, and therefore the cover plate and the flange plate are fastened and connected.
The safety redundant mechanism is further improved in that a sleeve is further sleeved on the fastening connecting piece and supported between the cover plate and the knife box.
A further development of the safety redundant mechanism according to the invention is that the fastening connections are connected to the top and bottom of the cover plate.
A further development of the safety redundant mechanism according to the invention is that the cover plate has a size which is larger than the size of the end of the knife bucket remote from the knives.
The invention also provides a method for installing the safety redundancy mechanism for preventing the replaceable cutter under normal pressure from falling off, which comprises the following steps:
providing a cover plate, blocking the cover plate at the end part, far away from the cutter, of the cutter barrel, and reserving a gap between the cover plate and the end part, far away from the cutter, of the cutter barrel; and
and providing a fastening connecting piece, and fastening and connecting the cover plate with a knife box provided with the knife barrel by using the fastening connecting piece.
The mounting method of the invention is further improved in that the fastening connecting piece is used for fastening and connecting the cover plate and the knife box for mounting the knife barrel, and the mounting method comprises the following steps:
a flange plate is arranged at the end part, far away from the cutter, of the cutter box, and a connecting hole is formed in the flange plate;
through holes are formed in the cover plate corresponding to the connecting holes in the flange plate;
the fastening connecting piece is a connecting bolt, and the connecting bolt penetrates through the through hole in the cover plate and the connecting hole in the flange plate and is in threaded connection with a connecting nut so as to be fastened and connected with the cover plate and the flange plate.
The mounting method of the invention is further improved in that the method further comprises the following steps:
and providing a sleeve, sleeving the sleeve on the fastening connecting piece, and enabling the sleeve to be supported between the cover plate and the knife box.
A further improvement of the installation method of the invention consists in connecting the fastening connections to the top and bottom of the cover plate.
A further improvement of the mounting method of the present invention is that the size of the cover plate is larger than the size of the end of the knife bucket remote from the knives.
Drawings
Fig. 1 is a schematic structural diagram of a knife barrel and a knife box in the prior art.
Fig. 2 is a schematic structural diagram of the safety redundant mechanism for preventing the replaceable cutter from falling off under normal pressure of the invention, which is arranged in the cutter box.
FIG. 3 is a flow chart of a method for installing a safety redundant mechanism for preventing a replaceable tool from falling off under normal pressure according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 2, the invention provides a safety redundancy mechanism for preventing a replaceable cutter under normal pressure from falling off and an installation method thereof, wherein a cover plate is arranged to be connected with a cutter box by using a bolt, the normal pressure cutter changing work is not influenced, the cutter can be normally changed only by detaching the cover plate before the cutter changing, and the cover plate is installed back after the cutter changing is finished, so that the protection effect can be achieved; a gap is reserved between the cover plate and the cutter barrel, so that the bolt can be conveniently checked and the condition of bolt fracture can be conveniently processed; the cutter barrel can move backwards for a certain distance after the bolt is broken through the reserved gap, so that the cutter barrel can be away from the excavation surface for a certain distance without being subjected to reaction force, and the bolt for pulling the cover plate is prevented from being broken again under stress; the fastening connecting piece can bear the impact force generated when the knife barrel is popped up without breaking, so that the firmness and the reliability of the structure are ensured; after the cutter barrel bolt is broken, the cutter barrel moves backwards for a certain distance and cannot be separated from the cutter box, and the sealing ring on the cutter barrel and the cutter barrel can play a role in preventing muddy water from flowing into the flange tank. The safety redundant mechanism for preventing the normal pressure replaceable cutter from falling off and the installation method thereof are explained below with reference to the attached drawings.
Referring to fig. 1, a schematic structural diagram of a knife barrel and a knife box in the prior art is shown. As shown in fig. 1, in order to realize the normal pressure replacement of the scraper 12a, in the prior art, a scraper 12a is installed by adopting an installation manner of a cutter barrel 11a and a cutter box 13a, the cutter box 13a is fixed on the shield machine, an installation space is formed inside the cutter box 13a, a gate is arranged in the middle of the cutter box 13a, the front end of the cutter barrel 11a is fixedly connected with the scraper 12a, then the cutter barrel 11a is inserted into the cutter box 13a, the scraper 12a extends out from the front end of the cutter box 13a and is arranged in front of a cutter head of the shield machine, and a plurality of sealing rings are arranged on the cutter barrel 11a to seal a gap between the cutter barrel 11a and the cutter box 13 a. The knife barrel 11a and the knife box 13a are connected through bolts. In the tunneling process of the shield tunneling machine, the scraper 12a is in contact with the tunneling surface and cuts the soil body at the tunneling surface, so that the reaction force of the tunneling surface acting on the scraper 12a can directly act on the bolt between the cutter barrel 11a and the cutter box 13a, in the long-time tunneling process, the bolt is easy to break, when the bolt breaks, the reaction force borne by the scraper 12a can pop the cutter barrel 11a out of the cutter box 13a, so that the installation space inside the cutter box 13a is communicated with the tunneling surface and the shield tunneling machine in front of the cutter head, muddy water at the tunneling surface can directly flow into the shield tunneling machine, and once the situation occurs, the processing can be very troublesome. The method is characterized in that a worker with pressure enters a flange tank or excavates a bin to find a cutter barrel falling position under negative high pressure, then a special blank board or a blank plug is installed to plug a leakage opening, the flange tank and a plurality of devices need to be cleaned for a long time afterwards, at least one worship time is needed from dangerous case occurrence to normal restoration, a large amount of manpower, material resources and financial resources are wasted, and the project progress is seriously influenced.
In order to solve the above problems, the present invention provides a safety redundant mechanism for preventing the normal pressure replaceable tool from falling off, and referring to fig. 2, a schematic structural diagram of the safety redundant mechanism for preventing the normal pressure replaceable tool from falling off being installed in a tool box is shown. The safety redundant mechanism for preventing the replaceable tool from falling off under normal pressure according to the present invention will be described with reference to fig. 2.
As shown in fig. 2, the safety redundant mechanism 20 for preventing the replaceable cutter at normal pressure of the present invention comprises a cover plate 21 and a fastening connector 22, wherein the cover plate 21 is blocked at an end 111 of the cutter barrel 11 far away from the cutter 12, a gap 211 is left between the cover plate 21 and the end 111 of the cutter barrel 11, and a certain distance is formed between the cover plate 21 and the end 111 of the cutter barrel 11 by using the gap 211; the fastening connector 22 is fastened to the cover plate 21, and the cover plate 21 is fastened to the knife box 13 on which the knife barrel 11 is mounted by the fastening connector 22.
According to the invention, the end part of the knife box 13 is connected with the cover plate 21 for blocking the knife barrel 11 through the fastening connecting piece 22, the knife barrel 11 which is popped backwards is blocked by the cover plate 21, the knife barrel 11 is prevented from being separated from the knife box 13, the knife barrel 11 and the sealing ring on the knife barrel are used for plugging the installation space in the knife box 13, the muddy water is prevented from being filled, and the risk that the knife barrel is separated from the popped knife box to cause the flange tank to be submerged is avoided.
Leave between the tip 111 of apron 21 and sword bucket 11 and be equipped with the clearance for one section distance can be popped out backward to sword bucket 11, and then the scraper 12 of sword bucket 11 and excavation face contactless, the sword bucket no longer receives the reaction force of excavation face, the sword bucket can not exert the effort to apron 21 and fastening connection piece 22 promptly, apron 21 and fastening connection piece 22 only need bear the impact of sword bucket 11 rebound backward, and need not to continuously receive reverse effort, the fastening connection piece that can avoid holding the apron is the cracked condition of atress once more takes place. The safety redundancy mechanism has the advantages of firm structure, stability and reliability.
According to the safety redundancy mechanism, after the cutter barrel bolt is broken, the cutter barrel is blocked by the cover plate, the processing is also convenient and efficient, the normal-pressure cutter changing tool of the cutter barrel is only required to be installed, the jack is contracted to draw out the cutter barrel, the gate of the cutter box is closed, the cutter barrel fixing bolt is replaced, the propulsion can be recovered, the situation from the occurrence of the processing problem to the propulsion recovery can be completed in less than 4 hours, the risk of warehouse entry and leakage blockage of pressure workers after the flange tank is submerged is fundamentally avoided, meanwhile, the actual situation of processing dangerous situations is greatly saved, and the construction period, equipment and labor cost are saved.
As a preferred embodiment of the present invention, a flange plate 131 is disposed on an end of the knife box 13 away from the knife 12, and a plurality of connection holes are disposed on the flange plate 131; the cover plate 21 is provided with a through hole corresponding to the connecting hole on the flange plate 131; the fastening connector 22 is a connection bolt which passes through the through hole of the cover plate 21 and the connection hole of the flange plate 131 and is screw-coupled with a connection nut, thereby fastening the cover plate 21 and the flange plate 131.
The cover plate 21 and the knife box 13 are connected by the connecting bolts, so that the assembly is simple and convenient, and the connecting strength of the connecting bolts can bear the impact force generated when the knife barrel is popped up without fracture.
In another preferred embodiment of the present invention, a sleeve is further sleeved on the fastening connector 22, and the sleeve is supported between the cover plate 21 and the knife box 13. Utilize the sleeve pipe to support between the flange board 131 of apron 21 and tool box 13, improve the fastness of connection and the stability between apron 21 and the tool box 13, sleeve pipe and fastening connection piece 22 connect into an overall structure with apron 21 and tool box 13, when apron 21 receives backward impact force, sleeve pipe and fastening connection piece 22 transmit the reverse effort part of apron 21 for tool box 13 together, and then transmit for the shield machine by tool box 13, share the partial impact force that apron 21 bore, the impact force that the rebound that has realized overall structure and bore knife bucket 11 together produced, the security and the reliability of structure have been guaranteed.
As still another preferred embodiment of the present invention, fastening connectors 22 are attached to the top and bottom of the cover plate 21. And the fastening connector 22 is arranged to ensure that a certain distance is reserved between the cover plate 21 and the flange plate 131 of the knife box 13, the distance can facilitate the inspection of bolts between the knife box 13 and the knife barrel 11, and the fracture condition of the bolts can be conveniently treated.
Preferably, four fastening connectors 22 are disposed at the top and bottom of the cover plate 21, and the four fastening connectors 22 are disposed at equal intervals.
As a further preferred embodiment of the present invention, the cover plate 21 has a size larger than that of the end 111 of the knife barrel 11 far from the knife 12. The larger cover plate 21 is used to block the end 111 of the knife barrel 11 to prevent the knife barrel 11 from falling off.
Preferably, the cover plate 21 is dimensioned to fit the dimensions of the flange plate 131.
The middle part of the knife box 13 is provided with a gate 132, after the knife barrel 11 is popped out for a certain distance backwards, the cover plate 21 is detached, the knife barrel normal pressure knife changing tool is installed, the knife barrel is pulled out, the installation space in the knife box 13 is sealed by the gate 132, the fixing bolt of the knife barrel 11 is replaced, the knife barrel 11 is installed on the knife box 13, and then the cover plate 21 is installed on the knife box 13, so that the pushing can be recovered.
The method for mounting the safety redundant mechanism for preventing the replaceable tool from falling off under normal pressure provided by the invention is explained below.
As shown in fig. 3, the installation method of the safety redundant mechanism for preventing the replaceable cutter from falling off at normal pressure provided by the invention comprises the following steps:
step S101 is executed to provide a cover plate, and as shown in fig. 2, the cover plate 21 is blocked at the end 111 of the knife barrel 11 far from the knife 12, and a gap 211 is left between the cover plate 21 and the end 111 of the knife barrel 11 far from the knife 12; step S102 is then performed.
Step S102 is executed to provide the fastening connector 22, and the cover plate 21 is fastened and connected to the knife box 13 of the knife barrel 11 by using the fastening connector 22.
The end part of the knife box 13 is connected with a cover plate 21 for blocking the knife barrel 11 through a fastening connecting piece 22, the knife barrel 11 which is popped backwards is blocked by the cover plate 21, the knife barrel 11 is prevented from being separated from the knife box 13, the knife barrel 11 and a sealing ring on the knife barrel 11 are used for plugging the mounting space inside the knife box 13, the muddy water is prevented from being poured, and the risk that the knife barrel is separated from the popped knife box to cause the submerged flange tank is avoided.
Leave between the tip 111 of apron 21 and sword bucket 11 and be equipped with the clearance for one section distance can be popped out backward to sword bucket 11, and then the scraper 12 of sword bucket 11 and excavation face contactless, the sword bucket no longer receives the reaction force of excavation face, the sword bucket can not exert the effort to apron 21 and fastening connection piece 22 promptly, apron 21 and fastening connection piece 22 only need bear the impact of sword bucket 11 rebound backward, and need not to continuously receive reverse effort, the fastening connection piece that can avoid holding the apron is the cracked condition of atress once more takes place.
In a preferred embodiment of the present invention, a knife box for mounting a knife barrel thereon is fastened to a cover plate by a fastening member, including:
a flange plate 131 is arranged at the end part of the knife box 13 far away from the knife 12, and a connecting hole is arranged on the flange plate 131;
through holes are formed in the cover plate 21 corresponding to the connecting holes in the flange plate 131;
the fastening connector 22 is a connecting bolt, and the connecting bolt passes through the through hole of the cover plate 21 and the connecting hole of the flange plate 131 and is screwed with a connecting nut to fasten the cover plate 21 and the flange plate 131.
As another preferred embodiment of the present invention, the present invention further comprises:
and providing a sleeve, sleeving the sleeve on the fastening connecting piece, and supporting the sleeve between the cover plate and the knife box.
Utilize the sleeve pipe to support between the flange board 131 of apron 21 and tool box 13, improve the fastness of connection and the stability between apron 21 and the tool box 13, sleeve pipe and fastening connection piece 22 connect into an overall structure with apron 21 and tool box 13, when apron 21 receives backward impact force, sleeve pipe and fastening connection piece 22 transmit the reverse effort part of apron 21 for tool box 13 together, and then transmit for the shield machine by tool box 13, share the partial impact force that apron 21 bore, the impact force that the rebound that has realized overall structure and bore knife bucket 11 together produced, the security and the reliability of structure have been guaranteed.
As a further preferred embodiment of the invention, fastening connectors are attached to the top and bottom of the cover plate. And the fastening connector 22 is arranged to ensure that a certain distance is reserved between the cover plate 21 and the flange plate 131 of the knife box 13, the distance can facilitate the inspection of bolts between the knife box 13 and the knife barrel 11, and the fracture condition of the bolts can be conveniently treated.
Preferably, four fastening connectors 22 are disposed at the top and bottom of the cover plate 21, and the four fastening connectors 22 are disposed at equal intervals.
As a further preferred embodiment of the present invention, the cover plate 21 has a size larger than that of the end 111 of the knife barrel 11 far from the knife 12. The larger cover plate 21 is used to block the end 111 of the knife barrel 11 to prevent the knife barrel 11 from falling off.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a prevent safe redundant mechanism that ordinary pressure removable cutter drops which characterized in that includes:
the cover plate is arranged at the end part, far away from the cutter, of the cutter barrel in a blocking mode, and a gap is reserved between the cover plate and the end part, far away from the cutter, of the cutter barrel; and
and the fastening connecting piece is tightly connected with the cover plate, and the cover plate is tightly connected with the knife box for installing the knife barrel through the fastening connecting piece.
2. The safety redundant mechanism according to claim 1, wherein a flange plate is provided on an end of the knife box away from the knife;
the cover plate is provided with a through hole corresponding to the connecting hole on the flange plate;
the fastening connecting piece is a connecting bolt, the connecting bolt penetrates through the through hole in the cover plate and the connecting hole in the flange plate and is in threaded connection with a connecting nut, and therefore the cover plate and the flange plate are fastened and connected.
3. A safety redundant mechanism according to claim 1 or 2 wherein a sleeve is also sleeved over said fastening connection, said sleeve being supported between said cover plate and said knife housing.
4. The safety redundant mechanism of claim 1 wherein said fastening links are attached to the top and bottom of said cover plate.
5. The safety redundant mechanism of claim 1, wherein the cover plate is sized larger than the end of the knife bucket distal from the knife.
6. A method for installing a safety redundancy mechanism for preventing a replaceable cutter from falling off at normal pressure is characterized by comprising the following steps:
providing a cover plate, blocking the cover plate at the end part, far away from the cutter, of the cutter barrel, and reserving a gap between the cover plate and the end part, far away from the cutter, of the cutter barrel; and
and providing a fastening connecting piece, and fastening and connecting the cover plate with a knife box provided with the knife barrel by using the fastening connecting piece.
7. The mounting method of claim 6, wherein the tightly connecting the cover plate with a knife box to which the knife cartridge is mounted using the fastening connector comprises:
a flange plate is arranged at the end part, far away from the cutter, of the cutter box, and a connecting hole is formed in the flange plate;
through holes are formed in the cover plate corresponding to the connecting holes in the flange plate;
the fastening connecting piece is a connecting bolt, and the connecting bolt penetrates through the through hole in the cover plate and the connecting hole in the flange plate and is in threaded connection with a connecting nut so as to be fastened and connected with the cover plate and the flange plate.
8. The mounting method according to claim 6 or 7, further comprising:
and providing a sleeve, sleeving the sleeve on the fastening connecting piece, and enabling the sleeve to be supported between the cover plate and the knife box.
9. The method of installation according to claim 6, wherein the fastening connections are attached to the top and bottom of the cover plate.
10. The method of mounting of claim 6, wherein the cover plate is of a size greater than the end of the knife bucket distal from the knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213528.1A CN109236306B (en) | 2018-10-18 | 2018-10-18 | Safety redundancy mechanism for preventing replaceable cutter under normal pressure from falling off and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213528.1A CN109236306B (en) | 2018-10-18 | 2018-10-18 | Safety redundancy mechanism for preventing replaceable cutter under normal pressure from falling off and installation method thereof |
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| Publication Number | Publication Date |
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| CN109236306A CN109236306A (en) | 2019-01-18 |
| CN109236306B true CN109236306B (en) | 2020-10-27 |
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| CN201811213528.1A Active CN109236306B (en) | 2018-10-18 | 2018-10-18 | Safety redundancy mechanism for preventing replaceable cutter under normal pressure from falling off and installation method thereof |
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| CN110331985A (en) * | 2019-07-30 | 2019-10-15 | 中铁工程装备集团有限公司 | Normal pressure cutter knife cylinder retracts extremely detects preventing mean and detection prevention method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589266A (en) * | 2014-11-20 | 2015-05-06 | 中国铁建重工集团有限公司 | Replacement device for shield cutters |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105216048A (en) * | 2015-10-16 | 2016-01-06 | 苏州杰威尔精密机械有限公司 | Pipe fitting cutter sweep |
| CN106499401B (en) * | 2016-12-19 | 2019-04-05 | 中交隧道工程局有限公司 | A kind of super-large-diameter shield machine normal pressure tool changing device and method |
| CN206636566U (en) * | 2017-03-20 | 2017-11-14 | 中铁十四局集团有限公司 | A kind of normal pressure scraper changes simulation storehouse |
| CN107893663A (en) * | 2017-12-26 | 2018-04-10 | 中铁工程装备集团有限公司 | A kind of replaceable doctor blade device of normal pressure |
| CN207960615U (en) * | 2018-03-07 | 2018-10-12 | 中铁隧道局集团有限公司 | Shield machine normal pressure tool changing knife lid, knife cylinder |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589266A (en) * | 2014-11-20 | 2015-05-06 | 中国铁建重工集团有限公司 | Replacement device for shield cutters |
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