CN103255991B - Slurry door for slurry shield tunneling machine and filling system of same - Google Patents
Slurry door for slurry shield tunneling machine and filling system of same Download PDFInfo
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- CN103255991B CN103255991B CN201310162898.8A CN201310162898A CN103255991B CN 103255991 B CN103255991 B CN 103255991B CN 201310162898 A CN201310162898 A CN 201310162898A CN 103255991 B CN103255991 B CN 103255991B
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Abstract
The invention provides a slurry door for a slurry shield tunneling machine, and further provides a filling system used for the slurry door. The slurry door comprises a door plate, a pressure-bearing baffle plate and a guide block used for installing the door plate on the pressure-bearing baffle plate. A groove accommodating a sealing piece is formed in a first surface, facing the pressure-bearing baffle plate, of the door plate, wherein the sealing piece comprises a central body, at least two outer side bodies and at least two radial connecting arms connecting the outer side bodies and the center body. The outer side bodies are fixed in the groove through a compressing piece fixed on the first surface of the door plate, and accordingly a sealed cavity is formed between the sealing piece and the groove. When pressure media are filled into the sealed cavity, the central body moves towards the pressure-bearing baffle plate under the action of pressure until a sealing surface of the central body is tightly attached to the pressure-bearing baffle plate.
Description
Technical field
The invention belongs to shield excavation machine technical field, particularly a kind of mud door for slurry type shield machine.The invention still further relates to a kind of fill system for above-mentioned mud door.
Background technology
Shield construction has fast, safety, to plurality of advantages such as ground effect on building are little, become urban subway tunnel at present, across the prefered method to construction safety and the strict underground engineering construction of Land-Subsidence Control such as tunnel over strait, river.Different according to the mode of shield-tunneling construction balance face, earth pressure balanced shield, EPBS, slurry balance shield and open type shield structure can be divided into.Wherein, slurry balance shield employing mud balances the Water And Earth Pressures from face, and mud cabin is divided into native cabin (front cabin) gentle dunnage (rear cabin) by a pressure-bearing dividing plate by it.Pressure-bearing the lower partition has a mud inlet, and it is the passage of mud discharge currents warp, is also mud communicating passage in the gentle dunnage of mud in native cabin.On the top of mud inlet, generally all configure one mud door, close for mud is imported and exported.
In normal tunneling process, be full of the mud with certain pressure in native cabin, and air cushion cabin internal upper part is full of compressed air, bottom is full of mud.Mud door is mentioned by lift cylinder, and is fixed on above mud inlet.Mud inlet is in opening-wide state, and now air cushion cabin is an enclosure space bearing air pressure and mud pressure.When needs enter air cushion cabin carry out checking or maintenance activity time, because band is compressed into, cabin cost is large, the single operation time is short, particularly strict to entering cabin personnel requirement, is all generally select normal pressure to enter cabin mode.And the flexibility of mud door operation and after closing the reliability of sealing most important, directly affecting normal pressure enters the smooth enforcement of cabin operation and enters the life security of cabin personnel, is the important safety device of slurry shield.
Fig. 1 shows a kind of mud door of existing slurry type shield machine.As shown in Figure 1, the mud door of the prior art comprises door-plate 7A, pressure-bearing dividing plate 11A, the combined type guide pad be arranged on by door-plate 7A by securing member on pressure-bearing dividing plate 11A, and be arranged on door-plate 7A towards the pressure bladder 407A in the groove 202A on the surface, side of pressure-bearing dividing plate 11A.Pressure bladder 407A is fixed in groove 202A by securing member 409A and block 408A.Combined type guide pad comprises guide pad 9A and is welded on the lower guide pad 10A on pressure-bearing dividing plate 11A.Between upper guide pad 9A and lower guide pad 10A, define gathering sill 12A, the side of door-plate 7A remains in this gathering sill 12A.
The operating principle of the mud door of this slurry shield is: after mud door is transferred and put in place, is inflated in pressure bladder by inflating nozzle, and air bag is expanded, and gasbag outer surface is adjacent to pressure-bearing dividing plate under gas pressure, thus realizes sealing effectiveness.The blowing pressure is larger, and the seal pressure of gasbag outer surface is also larger, and sealing effectiveness is also better.Because air bag is generally elastomeric material, possesses certain elasticity.When sealing surface retains a small amount of fine solid particles, air bag, behind inflation press seal face, also can pass through elastic deformation press seal face, thus realizes sealing.The blowing pressure is larger, and air bag thrust is also larger, and rubber compress variation is also larger, and between opposing sealing surface, the ability of solid particle impact is also larger.Little at edpth of tunnel, native cabin mud pressure is lower, the impurity particle that sealing surface enters less and thinner, this hermetically-sealed construction is suitable, generally can realize sealing.
But under tunnel great burying condition, there is outstanding shortcoming in this kind of airbag structure: the blowing pressure can not be excessive, when seal clearance enters more thick solid particle, because the blowing pressure is inadequate, gasbag outer surface can not effectively be adjacent to pressure-bearing dividing plate, thus reduces effect.The reason that current air sac sealing bearing capacity is low is as follows: 1) between mud door door-plate and pressure-bearing dividing plate, generally leave the free gap of about 5mm, move to facilitate mud door and reduce friction, when air bag inflation pressure is larger, easily rubber is clamp-oned gap and be destroyed; 2) there is radial clearance between the installing hole of the inflating nozzle of air bag and valve screw rod, when air bag inflation pressure is larger, rubber can be clamp-oned the radial clearance below valve and be destroyed equally.
Current tunnel construction, particularly city underground, hidden underground construction, progressively towards great burying future development, and the slurry shield soil cabin mud pressure under great burying condition must strengthen.In addition from the viewpoint of raising sealing reliability, be also improved the current demand of mud door the blowing pressure.
Summary of the invention
The object of this invention is to provide a kind of mud door for slurry type shield machine, to solve the problem that mud door the blowing pressure is low, sealing effectiveness is unstable of current use.Only solve above-mentioned two problems, mud door can be applied to the normal pressure of slurry shield under great burying condition and enter cabin operation.
According to a first aspect of the invention, a kind of mud door for slurry type shield machine is provided.This mud door comprises door-plate, pressure-bearing dividing plate, and for door-plate being arranged on the guide pad on pressure-bearing dividing plate.On the first surface of pressure-bearing dividing plate, the groove wherein containing seal is formed with at door-plate.Wherein, seal comprises centerbody, at least two outer lateral bodys, and at least two the radial linking arms be connected with centerbody by each outer lateral body.Outer lateral body is fixed in groove by the compressing member be fixed on the first surface of door-plate, thus forms annular seal space between seal and groove.When to annular seal space injection pressure medium, centerbody is under the effect of the pressure towards pressure-bearing partition movement, until the sealing surfaces of centerbody abuts on pressure-bearing dividing plate.
In one embodiment, the length of centerbody and cross sectional area are all greater than length and the cross sectional area of outer lateral body.Preferably, the sealing surfaces of centerbody is smooth surface, surface with undulations, or has the surface of spacing convave trough.
In one embodiment, in annular seal space before non-injection pressure medium, sealing surfaces is lower than the rubbing surface of compressing member.
In one embodiment, centerbody is prismatic, and is equipped with baffle plate on two opposite flanks of centerbody.Preferably, the sealing surfaces of centerbody is in its natural state lower than the outer surface of door-plate.
In one embodiment, compressing member comprises the first compressing member and the second compressing member that are oppositely arranged, and they contact with in baffle plate respectively.Preferably, the first compressing member and the second compressing member are equipped with detent, and the first surface of door-plate is provided with two corresponding stopper slots, and described detent and stopper slot are worked in coordination with the outer lateral body of fixing seals.
In one embodiment, the surface towards door-plate of the centerbody of sealing ring has central recess.
In one embodiment, combined type guide pad comprises the first guide pad and the second guide pad.Between the first guide pad and the second guide pad, being formed with the lateral slot at the edge for holding door-plate, and being provided with spacer block between the edge and the bottom surface of lateral slot of door-plate.
According to a second aspect of the invention, provide a kind of fill system for mud door as above, it comprises the pressure medium feeding pipe and gas feed line that are connected with the annular seal space of door-plate, and described pressure medium feeding pipe has backflow branch road.Wherein, pressure medium can be transported in annular seal space by pressure medium feeding pipe, and makes the pressure that annular seal space reaches required when gas feed line is closed, to maintain the sealing of mud door.Gas feed line can deliver gas in annular seal space, to make the pressure medium in annular seal space be discharged to backflow branch road, reduces the pressure in annular seal space, thus mud door is opened and avoids the friction damage of sealing ring.
In one embodiment, pressure medium can be hydraulic oil, water or compressed air.
In one embodiment, pressure medium feeding pipe comprises accumulator, for maintaining the pressure in annular seal space.
Compared with prior art, the beneficial effect that mud door scheme provided by the present invention has is, can to expand the flexible and metal baffle of movement and eliminate conventional inflating nozzle structure with sealing ring by arranging in the boss both sides in linking arm centre position, effectively prevent sealing ring to be destroyed because clamp-oning gap after bearing high pressure, improve the bearing capacity of sealing ring, sealing reliability is higher, particularly can be used in the operation of great burying operating mode; Both can injection liquid force feed, water in annular seal space, also can inflate, thus expand the range of choice of mud door pressure medium and the pressurising scope of permission, improve the convenience of equipment use, safety and reliability.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.
Fig. 1 is the sealed structural representation of existing mud door;
Fig. 2 is the schematic diagram that mud door according to the present invention is in open mode;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the schematic diagram that mud door according to the present invention is in closed condition;
Fig. 5 is the B-B sectional view of Fig. 4;
Fig. 6 is the C-C sectional view of Fig. 4;
Fig. 7 shows the medium supply system for providing pressure medium for mud door according to the present invention.
Detailed description of the invention
Contrast accompanying drawing below, by the description to embodiment, to the specific embodiment of the present invention, be described in further detail.
Fig. 2 to 3 shows the schematic diagram according to the mud door 100 for slurry type shield machine of the present invention.Under shown position, the push cylinder 25 of mud door 100 is in contraction state, and now mud door 100 is in untapped state, that is, mud door 100 does not close stock inlet 17.
As shown in Figure 3, mud door 100 comprises door-plate 7, pressure-bearing dividing plate 11, and for door-plate 7 being arranged on the guide pad on pressure-bearing dividing plate 11.In the illustrated embodiment, this guide pad is combined type guide pad, comprises the first guide pad 9 and is welded on the second guide pad 10 on pressure-bearing dividing plate 11.First guide pad 9 is fixed on the second guide pad 10 by securing member 41.Between the first guide pad 9 and the second guide pad 10, define gathering sill 8, the side of door-plate 7 is remained in this gathering sill 8 regularly by the pressuring action of the first guide pad 9 and/or the second guide pad 10.On the first surface 71 of pressure-bearing dividing plate 11, be formed with groove 202 at door-plate 7, in this groove 202, lay seal 4, for forming sealing between door-plate 7 and pressure-bearing dividing plate 11.Said structure and parts are known in the art, are described in this and omit therefore in detail.
According to the present invention, seal 4 comprises centerbody 406.This centerbody 406 is such as prismatic component, preferably has square cross section.Seal 4 also comprises at least two outer lateral bodys 402, and they are circumferentially arranged equably.In the illustrated embodiment, seal 4 also comprises two outer lateral bodys 402 be oppositely arranged in 180 degree to each other.Outer lateral body 402 such as can have cross section that is square or circle, or has the cross section of other any desired configuration.In addition, seal 4 also comprises the radial linking arm 405 be connected with centerbody 406 by each outer lateral body 402, is two radial linking arms 405 in this illustrated embodiment.In the illustrated embodiment, the bottom of centerbody 406 has central recess 404.
As shown in Figure 3, in groove 202, be also provided with compressing member, it is fixed on the first surface 71 of door-plate 7 by securing member 43 on the one hand, is pressed on the first surface of door-plate 7 by outer lateral body 401 on the other hand.Specifically, compact heap comprises the first compressing member 3 and the second compressing member 6, and they are respectively for one of compressing in two outer lateral bodys 401.In order to strengthen positioning compression effect, the first compressing member 3 and the second compressing member 6 being respectively equipped with the detent 401 for holding two outer lateral bodys 402, and being provided with stopper slot 72 in the corresponding position of first surface 71.Thus, the outer lateral body 401 of seal 4 can be fixed by the first compressing member 3 and the second compressing member 6 securely.By above-mentioned setting, between seal 4 and groove 202, form an annular seal space 201.
According to a preferred embodiment of the present invention, between compressing member 3,6 and the centerbody 406 of seal 4, a baffle plate 5 is respectively equipped with.This baffle plate 5 such as can be made of metal.Baffle plate 5 and compressing member 3,6 and all being formed with seal 4 contacts, and is preferably clearance-type and coordinates contact.
In addition, according to a preferred embodiment of the present invention, in order to position compressing member 3,6 better, can limited step 602 and 603 be set on first surface 71.
Under the mud door 100 shown in Fig. 2 and 3 is in untapped state, there is not pressure medium in annular seal space 201 planted agent, although or have a small amount of pressure medium, it is also in normal pressure or lower than under atmospheric pressure.In this case, seal 4 is in nature advanced position, and the sealing surfaces of centerbody 406 is lower than the outer surface of door-plate 7.
Fig. 4 to 6 shows the using state according to the mud door 100 for slurry type shield machine of the present invention.Now, the push cylinder 15 of mud door 100 is extended, and promotes mud door 100 and moves under the guiding of guiding groove 8, until the spacing and stop motion by limited block 16.Therefore, mud door 100 encloses stock inlet 17.
In this state, by being positioned at the fluid intake 14 injection pressure medium at place bottom door-plate 7 to annular seal space 201.As shown in Figure 5, when in annular seal space during 201 injection pressure medium, centerbody 406(is together with radial linking arm 405) move towards pressure-bearing dividing plate 11 under the effect of the pressure, until the sealing surfaces 403 of centerbody 406 abuts on pressure-bearing dividing plate 11.Now, between door-plate 7 and pressure-bearing dividing plate 11, good sealing is defined.
Because the baffle plate 5 be arranged between the centerbody 406 of seal and compressing member also can move towards pressure-bearing dividing plate 11 in company with centerbody 406 because of the motion of radial linking arm 405 together.So just, seal 4 effectively can be prevented to be squeezed in gap after bearing high pressure be damaged, improve bearing capacity and the reliability of seal.This is for especially favourable great burying operating mode.
The sealing surfaces that Fig. 6 more clearly illustrates centerbody abuts in the state on pressure-bearing dividing plate.Fig. 6 also show the outlet opening 13 for pressure medium.Easy understand, when in annular seal space 201 during injection pressure medium, first the air that originally may exist in annular seal space will discharge.When outlet opening 13 discharge pressure medium, outlet opening 13 can be closed.Now continue injection pressure medium in annular seal space 201, until the sealing surfaces 403 of seal 4 abuts on pressure-bearing dividing plate 11.
In a specific embodiment, as shown in Figure 3, spacer block 1 can be set in gathering sill 8, the side of door-plate 7 can be remained in gathering sill 8 better.
In order to strengthen sealing effectiveness, the centerbody 406 of seal 4 should have the sectional area larger than outer lateral body 402 and larger length.The centerbody 406 of seal 4 can be solid or hollow.
In addition, seal 4 should be designed to when being in nature retracted state, and the sealing surfaces 403 of centerbody 406 should be in than baffle plate 5 and compressing member 3,6 and rubbing surface 601 position further from pressure-bearing dividing plate 11.Thus, the centerbody 406 of seal 4 can in a non-operative state from the damage of outside.
According to a further aspect in the invention, additionally provide a kind of for providing the medium supply system of pressure medium for mud door according to the present invention.Below with reference to Fig. 7, this medium supply system is described in detail.
As shown in Figure 7, this medium supply system comprises aerating pipeline and in-line, and wherein in-line is connected with the oil-in 15 on door-plate 7, and aerating pipeline is connected with the oil-out 14 on door-plate 7.
Aerating pipeline comprises gas source inlet 251, air reducing valve 252, hydraulic quick coupler 203, ball valve 204, one way valve 218 and pressure meter 206 successively.Between pressure meter 206 and one way valve 218, be provided with a branch air path 221, this branch road be provided with ball valve 205.In-line comprises oil sources import 207, hydraulic relief valve 209, hydraulic quick coupler 210, ball valve 222, hydraulic accumulator 208, ball valve 211, one way valve 219 and input pressure table 214 successively.Branch's oil circuit 220 is provided with between pressure meter 214 and one way valve 219.This branch's oil circuit is provided with ball valve 213 and fuel tank 212 successively.
When the push cylinder 25 of mud door 100 is in contraction state, mud door 100 is in open mode.The ball valve 205 of medium supply system is opened, and other ball valves are closed, and seal groove 201 inner space now on door-plate 7 is communicated with air, sealing ring 4 not pressurized be in contraction state.
When the push cylinder 25 of mud door 100 is extended, promote mud door 100 and move under the guiding of guiding groove 8, until mud door 100 encloses stock inlet 17.Now mud door 100 is in closed condition.In this case, open ball valve 222 and ball valve 211 successively, injection liquid force feed in seal groove 201, now keep ball valve 205 to open, ball valve 213 and ball valve 204 are closed.When ball valve 205 starts spillage force feed, close ball valve 205 immediately.Continue through ball valve 222 and ball valve 211 toward the pressurization of seal groove 201 internal-filling liquid, pressure dwell observes input pressure table 214 numerical value.When indicated value reaches predetermined pressure, close ball valve 222.Now accumulator 208 pairs of seal grooves carry out voltage stabilizing, and sealing ring 4 is in topping up sealing state.
When mud door 100 finish using need to reopen time, need first carry out pressure release to medium supply system.First close ball valve 211, then open ball valve 213, the high pressure liquid force feed in seal groove 201 drains in fuel tank 212 through branch line 220 by sealing ring 4 under mud pressure and own resilience effect.Until branch line 212 outlet no longer include oil spill go out time, open the ball valve 204 on aerating pipeline, Compressed Gas enters in seal groove 201, is extruded the hydraulic oil remained in groove, until branch line 220 end Exhaust Gas.Now close ball valve 204 and ball valve 213, open ball valve 205 and exit, sealing ring 4 is in contraction state.Now push cylinder 25 can be bounced back and promote mud door 100, stock inlet 17 is opened.
Easy understand, medium supply system adopts water as the operating principle of pressure medium and the identical of employing hydraulic oil, therefore repeats no more.
Medium supply system can also use gas such as compressed air, and now system operation principles is as follows.When mud door 100 is in the state opened, the ball valve 205 of medium supply system is opened, and all the other ball valves are closed, and seal groove 201 inner space now on door-plate 7 is communicated with air, sealing ring 4 not pressurized be in contraction state.When the push cylinder 25 of mud door 100 is extended, promote mud door 100 and move under the guiding of guiding groove 8, until mud door 100 encloses stock inlet 17.Now mud door 100 is in closed condition.Now, first close ball valve 205, then open ball valve 204 and start inflating pressure in seal groove 201, observe pressure meter 206, close ball valve 204 after reaching predetermined the blowing pressure, sealing ring 4 is in gas-flow closure state.When mud door 100 finish using need to reopen time, need first carry out pressure release to medium supply system, now open ball valve 205 and be exhausted pressure release, observe pressure meter 206.When manometric show value gets back to zero-bit, just push cylinder 25 can be bounced back and promote mud door 100, stock inlet 17 is opened.
The above specific embodiment; the object of the invention, technical scheme and beneficial effect are further illustrated; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention, within the spirit and principles in the present invention all, any amendment made; equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the mud door for slurry type shield machine, comprise door-plate, pressure-bearing dividing plate and for described door-plate being arranged on the guide pad on described pressure-bearing dividing plate, on the first surface of described pressure-bearing dividing plate, the groove wherein containing seal is formed with at described door-plate
It is characterized in that, described seal comprises centerbody, at least two outer lateral bodys, and by least two radial linking arms that each described outer lateral body is connected with centerbody, described outer lateral body is fixed in described groove by the compressing member be fixed on the first surface of described door-plate, thus annular seal space is formed between described seal and described groove
Wherein, when to described annular seal space injection pressure medium, described centerbody is under the effect of the pressure towards described pressure-bearing partition movement, until the sealing surfaces of described centerbody abuts on described pressure-bearing dividing plate.
2. mud door as claimed in claim 1, it is characterized in that, the length of described centerbody and cross sectional area are all greater than length and the cross sectional area of described outer lateral body.
3. mud door as claimed in claim 1 or 2, is characterized in that, the sealing surfaces of described centerbody is smooth surface, surface with undulations, or has the surface of spacing convave trough.
4. mud door as claimed in claim 1 or 2, it is characterized in that, in annular seal space before non-injection pressure medium, described sealing surfaces is lower than the rubbing surface of described compressing member.
5. mud door as claimed in claim 1 or 2, it is characterized in that, described centerbody is prismatic, and is equipped with baffle plate on two opposite flanks of described centerbody.
6. mud door as claimed in claim 5, it is characterized in that, the sealing surfaces of described centerbody is in its natural state lower than the outer surface of described door-plate.
7. mud door as claimed in claim 5, it is characterized in that, described compressing member comprises the first compressing member and the second compressing member that are oppositely arranged, and they contact with in described baffle plate respectively.
8. mud door as claimed in claim 7, it is characterized in that, described first compressing member and the second compressing member are equipped with detent, and the first surface of described door-plate is provided with two corresponding stopper slots, and described detent and stopper slot are worked in coordination with the outer lateral body of fixing described seal.
9. mud door as claimed in claim 1 or 2, it is characterized in that, the surface towards described door-plate of the centerbody of described sealing ring has central recess.
10. mud door as claimed in claim 1 or 2, it is characterized in that, described guide pad is combined type guide pad, described combined type guide pad comprises the first guide pad and the second guide pad, between described first guide pad and the second guide pad, being formed with the gathering sill at the edge for holding described door-plate, and being provided with spacer block between the edge of described door-plate and the bottom surface of described gathering sill.
11. 1 kinds of fill systems for the mud door such as according to any one of claim 1 to 10, comprise the pressure medium feeding pipe and gas feed line that are connected with the annular seal space of described door-plate, described pressure medium feeding pipe has backflow branch road,
Wherein, pressure medium can be transported in described annular seal space by described pressure medium feeding pipe, and makes the pressure that described annular seal space reaches required when described gas feed line is closed, to maintain the sealing of described mud door,
Described gas feed line can deliver gas in described annular seal space, to make the pressure medium in described annular seal space be discharged to described backflow branch road, reduce the pressure in described annular seal space, thus described mud door is opened and avoids the friction damage of sealing ring.
The fill system of 12. mud door as claimed in claim 11, it is characterized in that, described pressure medium is hydraulic oil, water or compressed air.
The fill system of 13. mud door as described in claim 11 or 12, it is characterized in that, described pressure medium feeding pipe comprises accumulator, for maintaining the pressure in described annular seal space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162898.8A CN103255991B (en) | 2013-05-06 | 2013-05-06 | Slurry door for slurry shield tunneling machine and filling system of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310162898.8A CN103255991B (en) | 2013-05-06 | 2013-05-06 | Slurry door for slurry shield tunneling machine and filling system of same |
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| CN103255991A CN103255991A (en) | 2013-08-21 |
| CN103255991B true CN103255991B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310162898.8A Active CN103255991B (en) | 2013-05-06 | 2013-05-06 | Slurry door for slurry shield tunneling machine and filling system of same |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806090B (en) * | 2015-04-30 | 2016-08-17 | 中铁工程装备集团有限公司 | A kind of shield machine automatic attaching/detaching apparatus of mud door safety pin |
| CN112922612A (en) * | 2021-03-02 | 2021-06-08 | 北京建工土木工程有限公司 | Shield tunneling machine starting tunnel portal sealing and water stopping device and construction method thereof |
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| GB892607A (en) * | 1958-11-12 | 1962-03-28 | Pittsburgh Plate Glass Co | Method and apparatus for polishing glass ribbons |
| CN202047823U (en) * | 2011-05-17 | 2011-11-23 | 北京华隧通掘进装备有限公司 | Water-sand inflow preventing sealing device for open-type shielding machine |
| CN102305083A (en) * | 2011-08-01 | 2012-01-04 | 北京市三一重机有限公司 | Shield machine and anterior shield system thereof |
| CN202441388U (en) * | 2012-02-15 | 2012-09-19 | 中铁隧道股份有限公司 | System for dredging clogged slurry door of slurry shield by virtue of back washing |
| CN203271515U (en) * | 2013-05-06 | 2013-11-06 | 中国铁建重工集团有限公司 | Slurry door for slurry-water shield tunneling machine and filling system of slurry door |
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2013
- 2013-05-06 CN CN201310162898.8A patent/CN103255991B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB892607A (en) * | 1958-11-12 | 1962-03-28 | Pittsburgh Plate Glass Co | Method and apparatus for polishing glass ribbons |
| CN202047823U (en) * | 2011-05-17 | 2011-11-23 | 北京华隧通掘进装备有限公司 | Water-sand inflow preventing sealing device for open-type shielding machine |
| CN102305083A (en) * | 2011-08-01 | 2012-01-04 | 北京市三一重机有限公司 | Shield machine and anterior shield system thereof |
| CN202441388U (en) * | 2012-02-15 | 2012-09-19 | 中铁隧道股份有限公司 | System for dredging clogged slurry door of slurry shield by virtue of back washing |
| CN203271515U (en) * | 2013-05-06 | 2013-11-06 | 中国铁建重工集团有限公司 | Slurry door for slurry-water shield tunneling machine and filling system of slurry door |
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Address after: 410100 Changsha Province, the city of Hunan by the East Road, No. seven, No. 88 Patentee after: China Railway Construction Heavy Industry Group Co., Ltd. Address before: 410100 Changsha Province, the city of Hunan by the East Road, No. seven, No. 88 Patentee before: China Railway Construction Heavy Industry Co.,Ltd. |