CN114033435B - Efficient grouting device for subway shield tunnel construction - Google Patents
Efficient grouting device for subway shield tunnel construction Download PDFInfo
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- CN114033435B CN114033435B CN202111476901.4A CN202111476901A CN114033435B CN 114033435 B CN114033435 B CN 114033435B CN 202111476901 A CN202111476901 A CN 202111476901A CN 114033435 B CN114033435 B CN 114033435B
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- fixedly connected
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- stirring
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 45
- 239000002002 slurry Substances 0.000 claims description 26
- 238000007569 slipcasting Methods 0.000 claims description 21
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 206010033799 Paralysis Diseases 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a high-efficiency grouting device for subway shield tunnel construction, which comprises the following components: the device comprises a box body and a placing plate fixedly connected to one end side wall of the box body, wherein a driving motor and an extruding part are fixedly connected to the placing plate, the extruding part comprises a driving shaft and a disc, the driving shaft transversely penetrates through the left side wall of the box body, the disc is in sealing sliding connection in the box body, the outer surface of the driving shaft is provided with reciprocating threads, and the disc is in threaded connection with the reciprocating threads on the driving shaft.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a high-efficiency grouting device for subway shield tunnel construction.
Background
The shield construction grouting can be divided into synchronous grouting, timely grouting and secondary grouting, wherein the synchronous grouting is a mode of immediately grouting when the super-digging gap is formed, so that the slurry is filled in the super-digging gap in time, and the grouting is timely performed: after tunneling one or more rings, a large amount of clearance space exists at the shield tail, and grouting is carried out on the overdrawing clearance in a secondary grouting mode: when the primary grouting effect is not ideal, the primary grouting needs to be supplemented through secondary grouting, and the primary grouting is optimized according to different geological conditions.
Along with the construction of subway tunnel, current shield constructs the machine and need keep the continuity of thick liquid always when the construction slip casting, just can reach the smooth completion of slip casting work, but if thick liquid transport disconnection is thick liquid and just can be detained in the box, just solidify in the box after long time, leads to the paralysis of slip casting system, and the thick liquid's the thick liquid viscosity can very much influence the quality of slip casting work when the slip casting simultaneously, consequently current shield constructs the slip casting device for tunnel construction because of not having inside quick mix structure, leads to the low of slip casting efficiency.
Disclosure of Invention
The invention aims to solve the defects in the prior art that the grouting operation can be successfully completed only by keeping the continuity of slurry in the construction grouting process of the existing shield machine, but if the slurry is conveyed and disconnected, the slurry stays in a box body and is solidified in the box body after a long time, so that the paralysis of a grouting system is caused, and meanwhile, the viscosity of the slurry can influence the quality of the grouting operation during grouting, so that the grouting efficiency is low because the existing grouting device for the construction of a shield tunnel does not have an internal rapid mixing structure.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a subway shield constructs tunnel construction with high-efficient slip casting device, subway shield constructs tunnel construction with high-efficient slip casting device includes:
the box body and a placing plate fixedly connected to the side wall of one end of the box body are fixedly connected with a driving motor;
the extrusion part comprises a driving shaft and a disc, the driving shaft transversely penetrates through the left side wall of the box body, the disc is connected in the box body in a sealing sliding manner, the outer surface of the driving shaft is provided with reciprocating threads, the disc is connected with the reciprocating threads on the driving shaft in a threaded manner, and the extrusion part is used for rapidly discharging slurry when grouting;
the stirring component comprises a moving block, a fixed shaft and a stirring rod, wherein the moving block is connected to the driving shaft in a sliding manner, one end of the fixed shaft is fixedly connected to the driving shaft, one end of the fixed shaft, which is far away from the driving shaft, is fixedly connected to the inner side wall of the box body, the moving block and one end of the fixed shaft are in an annular array and are provided with inclined rods, the stirring rod is hinged to the inclined rods, and the stirring component is used for stirring slurry;
the adjusting part comprises a vertical plate and a protruding block, wherein the vertical plate is arranged on the inner side wall of the box body in an annular array, the protruding block is arranged on the vertical plate in an equidistant array, one end of the stirring rod is slidably connected to the protruding block, and the adjusting part is used for stirring slurry better by the stirring rod.
Preferably, the extrusion part further comprises a telescopic rod and a closed cavity, one ends of the two telescopic rods are respectively and fixedly connected to the inner side wall of the box body, the other ends of the telescopic rods are fixedly connected to the disc, one ends of the closed cavity are rotatably connected to the driving shaft, and the other ends of the closed cavity are fixedly connected to the disc.
Preferably, the stirring component further comprises a discharging barrel, the discharging barrel is fixedly communicated with the box body, and the discharging barrel is located at the right upper end of the stirring rod.
Preferably, the adjusting part further comprises a sleeve, a push rod and a spring, wherein a plurality of sleeves are annularly arranged on the fixed shaft, one end of each push rod is slidably connected in the sleeve, and two ends of each spring are fixedly connected between the corresponding push rod and the bottom side wall of the sleeve.
Preferably, one end of the box body is fixedly communicated with a grouting pipe which is horizontally arranged.
Preferably, one end of the closed cavity, which is far away from the disc, is fixedly connected to the moving block.
Preferably, one end of the discharging barrel, which is far away from the box body, is fixedly connected with a grouting pump.
Preferably, the protruding block is arranged in an equilateral triangle shape, and one side of the protruding block is fixedly connected to the vertical plate.
Preferably, the push rod is hinged on the stirring rod.
Compared with the prior art, the invention has the beneficial effects that:
1. the drive end of driving motor drives the drive shaft rotation and drives threaded connection's disc and be left and right reciprocating motion in the box for can promote the thick liquid in the box when the disc moves right and have certain pressure, can be quick carry slip casting department through the slip casting pipe, make when the disc reciprocates left and right movement, can avoid slip casting pump pressure not enough and lead to thick liquid can not intensive and even arrival slip casting department.
2. When the disc and the closed cavity move rightwards, the right extrusion moving block slides on the driving shaft, the moving block extrudes the inclined rods rightwards, so that the plurality of stirring rods are respectively far away from the driving shaft, when the disc and the closed cavity move leftwards, the plurality of stirring rods are respectively pulled to move centrally through the inclined rods, and therefore when the disc moves leftwards and rightwards, the moving block is pulled to move leftwards and rightwards through the closed cavity, and the stirring rods are driven to be respectively far away from and close to each other through the inclined rods when the moving block moves leftwards and rightwards, so that the stirring effect on slurry in the box body can be achieved.
3. When the puddler reciprocates, the one end of puddler slides between a plurality of lugs, when the lug was kept away from to the puddler, because the puddler is kept away from the one end of lug and is articulated on the push rod, consequently under the elasticity of spring, for the puddler is the horizontality, thereby reach respectively at a plurality of puddlers with keep away from each other when moving in the middle of, the puddler sways simultaneously, thereby the mix work to the thick liquid in the box has been increaseed, make the thick liquid can be better carry out the slip casting through the slip casting pipe, carry out real-time mixing to the thick liquid in the box when breaking the thick liquid simultaneously, avoid the thick liquid to solidify in the box.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a box body of a high-efficiency grouting device for subway shield tunnel construction;
FIG. 2 is a schematic view of the structure of FIG. 1A in a partially enlarged manner;
fig. 3 is a schematic diagram of the front structure of the efficient grouting device for subway shield tunnel construction;
fig. 4 is a schematic diagram of the internal structure of a sleeve of the efficient grouting device for subway shield tunnel construction.
In the figure: 1 box, 2 sleeve, 3 puddler, 4 feed cylinder, 5 fixed axle, 6 risers, 7 discs, 8 telescopic links, 9 driving motor, 10 place board, 11 closed chamber, 12 movable block, 13 drive shaft, 14 diagonal rods, 15 grouting pipe, 16 grouting pump, 17 spring, 18 push rod, 19 lug.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 4, a high-efficiency grouting device for subway shield tunnel construction, the high-efficiency grouting device for subway shield tunnel construction includes:
the box body 1 and a placing plate 10 fixedly connected to the side wall of one end of the box body 1, wherein the fixing plate 10 is used for fixedly mounting a driving motor 9, one end of the box body 1 is fixedly communicated with a grouting pipe 15 which is horizontally arranged, the placing plate 10 is fixedly connected with the driving motor 9, and the driving electricity of the driving motor 9 is fixedly connected to one end of a driving shaft 13, so that the driving shaft 13 can be driven to rotate in the box body 1 when the driving motor 9 is connected with an external power supply for driving;
the extruding part comprises a driving shaft 13 and a disc 7, wherein the driving shaft 13 transversely penetrates through the left side wall of the box body 1, the disc 7 is connected in the box body 1 in a sealing sliding manner, reciprocating threads are formed on the outer surface of the driving shaft 13, the disc 7 is connected with the reciprocating threads on the driving shaft 13 in a threaded manner, when the driving motor 9 drives the driving shaft 13 to rotate, the disc 7 can reciprocate left and right in the box body 1, meanwhile, the disc 7 is hermetically slid in the box body 1, so that slurry in the box body 1 cannot flow to the left side of the disc 7 through the disc 7, the extruding part further comprises a telescopic rod 8 and a closed cavity 11, one end of the two telescopic rods 8 is fixedly connected to the inner side wall of the box body 1 respectively, the telescopic rod 8 has a telescopic direction and is used for stably sliding the disc 7, meanwhile, the disc 7 is limited, the other end of the telescopic rod 8 is fixedly connected to the disc 7, one end of the closed cavity 11 is rotationally connected to the driving shaft 13, the other end of the closed cavity 11 is fixedly connected to the disc 7 in a reciprocating manner, the disc 7 is positioned in the closed cavity 11, the inner part of the closed cavity 11, slurry cannot be damaged by the reciprocating threads, and the sealing cavity 11 cannot be rapidly extruded by the reciprocating threads, and the slurry cannot be smoothly discharged from the sealing part when the sealing cavity 11 is arranged, and the reciprocating smooth sealing cavity is not damaged by the sealing the disc 13, and the sealing part is arranged, and the sealing part is not damaged by the slurry, and the slurry can be rapidly and the sealing part is arranged;
the stirring component comprises a moving block 12, a fixed shaft 5 and a stirring rod 3, wherein the moving block 12 is slidably connected to a driving shaft 13, one end of the fixed shaft 5 is fixedly connected to the driving shaft 13, one end of the fixed shaft 5 far away from the driving shaft 13 is fixedly connected to the inner side wall of a box body 1, the moving block 12 and one end of the fixed shaft 5 are annularly provided with inclined rods 14 in an array, the stirring rod 3 is hinged to the inclined rods 14, one end of a closed cavity 11 far away from a disc 7 is fixedly connected to the moving block 12, when the driving shaft 13 moves rightwards, the moving block 12 is extruded rightwards through the closed cavity 11 to slide on the driving shaft 13, so that a plurality of stirring rods 3 are respectively far away from the driving shaft 13, when the disc 7 moves leftwards with the closed cavity 11, the moving block 12 is respectively pulled to move leftwards through the inclined rods 14, thus the stirring rod 3 is respectively far away from and close to each other when the moving block 12 moves leftwards and rightwards, the stirring component can achieve the effect of stirring slurry in the box body 1, and the stirring component also comprises a feeding cylinder 4, when the disc 7 moves leftwards and the closed cavity 11 moves leftwards, and the stirring rod 4 is connected to the stirring cylinder 4, and the stirring rod 3 falls into the stirring cylinder 3 is directly and is positioned on the stirring cylinder 3;
the regulating part, regulating part includes riser 6, lug 19, be annular array has riser 6 on the box 1 inside wall, be equidistant array has lug 19 on the riser 6, lug 19 is equilateral triangle setting, and lug 19 one side fixed connection is on riser 6, the one end sliding connection of puddler 3 is on lug 19, regulating part still includes sleeve 2, push rod 18, spring 17, a plurality of sleeves 2 are annular array on fixed axle 5, push rod 18 one end sliding connection is in sleeve 2, push rod 18 articulates on puddler 3, a plurality of spring 17 both ends are fixed connection respectively between push rod 18 and sleeve 2 bottom lateral wall, when puddler 3 reciprocates, the one end of puddler 3 slides between a plurality of lugs 19, at a plurality of puddlers 3 respectively at the center remove with each other when keeping away from, puddler 3 sways simultaneously, thereby the mix work to the thick liquid in box 1 has been increased, make thick liquid can be better carry out the slip casting through slip casting pipe 15, simultaneously mix the thick liquid in the box 1 in real-time when breaking thick liquid, thick liquid has better stirring part 3 to the setting in the box 1, it has better stirring part to be used for adjusting the puddler 3 to solidify.
In the invention, when the shield machine works and grouting is needed, firstly, when external slurry is extruded to a certain extent when passing through a grouting pump 16, the slurry is conveyed into a desired box body 1 through a blanking cylinder 4, the slurry gradually works through the box body 1 and a grouting pipe 15, when the slurry is grouted, a driving motor 9 is connected with an external power supply and is electrified, a driving end of the driving motor 9 drives a driving shaft 13 to rotate, a disc 7 in threaded connection moves left and right in the box body 1 in a reciprocating manner due to the rotation of the driving shaft 13, the slurry in the box body 1 can be pushed to have certain pressure when the disc 7 moves rightwards, and the slurry can be conveyed to a grouting position through the grouting pipe 15 quickly, so that the slurry can not densely reach the grouting position due to insufficient pressure of the grouting pump 16 when the disc 7 moves left and right in a reciprocating manner.
Meanwhile, when the driving shaft 13 rotates the disc 7 and the closed cavity 11 moves rightwards, the moving block 12 is extruded rightwards to slide on the driving shaft 13, so that the inclined rods 14 are extruded when the moving block 12 moves rightwards, the stirring rods 3 are respectively far away from the driving shaft 13, when the disc 7 and the closed cavity 11 move leftwards, the moving block 12 is pulled to move leftwards, and at the moment, the stirring rods 3 are respectively pulled to move centrally through the inclined rods 14, so that when the disc 7 moves leftwards and rightwards, the moving block 12 is pulled to move leftwards and rightwards through the closed cavity 11, and the stirring rods 3 are respectively driven to be far away from and close to each other through the inclined rods 14 when the moving block 12 moves leftwards and rightwards, so that the stirring effect on slurry in the box body 1 can be achieved.
When puddler 3 reciprocates, the one end of puddler 3 slides between a plurality of lugs 19, when puddler 3 slides when lug 19 pointed end, puddler 3 is the incline condition, when the lug 19 is kept away from to puddler 3, because the puddler 3 is kept away from the one end of lug 19 and articulates on push rod 18, therefore under the elasticity of spring 17, make puddler 3 be the horizontality, thereby reach respectively at a plurality of puddlers 3 remove with keeping away from each other in the middle, puddler 3 sways simultaneously, thereby the mix work to the thick liquid in box 1 has been enlarged, make the thick liquid carry out the slip casting through slip casting pipe 15 that thick liquid can be better, carry out real-time mixing to the thick liquid in the box 1 simultaneously when breaking the thick liquid, avoid the thick liquid to solidify in box 1.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a subway shield constructs tunnel construction with high-efficient slip casting device which characterized in that, subway shield constructs tunnel construction with high-efficient slip casting device includes:
the box body (1) and a placing plate (10) fixedly connected to the side wall of one end of the box body (1), wherein a driving motor (9) is fixedly connected to the placing plate (10);
the extrusion component comprises a driving shaft (13) and a disc (7), wherein the driving shaft (13) transversely penetrates through the left side wall of the box body (1), the disc (7) is connected in the box body (1) in a sealing sliding manner, the outer surface of the driving shaft (13) is provided with reciprocating threads, the disc (7) is in threaded connection with the reciprocating threads on the driving shaft (13), and the extrusion component is used for rapidly discharging slurry during grouting;
the stirring component comprises a moving block (12), a fixed shaft (5) and a stirring rod (3), wherein the moving block (12) is connected to the driving shaft (13) in a sliding manner, one end of the fixed shaft (5) is fixedly connected to the driving shaft (13), one end of the fixed shaft (5) far away from the driving shaft (13) is fixedly connected to the inner side wall of the box body (1), one end of the moving block (12) and one end of the fixed shaft (5) are in an annular array and provided with a diagonal rod (14), the stirring rod (3) is hinged to the diagonal rod (14), and the stirring component is used for stirring slurry;
the adjusting component comprises a vertical plate (6) and a protruding block (19), wherein the vertical plate (6) is arranged on the inner side wall of the box body (1) in an annular array, the protruding block (19) is arranged on the vertical plate (6) in an equidistant array, one end of the stirring rod (3) is slidably connected to the protruding block (19), and the adjusting component is used for stirring slurry better by the stirring rod (3);
the extrusion part further comprises a telescopic rod (8) and a closed cavity (11), one ends of the telescopic rod (8) are respectively and fixedly connected to the inner side wall of the box body (1), the other end of the telescopic rod (8) is fixedly connected to the disc (7), one end of the closed cavity (11) is rotatably connected to the driving shaft (13), the other end of the closed cavity (11) is fixedly connected to the disc (7), the protruding block (19) is in an equilateral triangle shape, and one side of the protruding block (19) is fixedly connected to the vertical plate (6).
2. The efficient grouting device for subway shield tunnel construction according to claim 1, wherein the stirring component further comprises a blanking barrel (4), the blanking barrel (4) is fixedly communicated with the box body (1), and the blanking barrel (4) is located at the right upper end of the stirring rod (3).
3. The efficient grouting device for subway shield tunnel construction according to claim 2, wherein the adjusting component further comprises a sleeve (2), a push rod (18) and springs (17), the plurality of sleeve (2) are annularly arranged on the fixed shaft (5), one end of the push rod (18) is slidably connected in the sleeve (2), and two ends of the plurality of springs (17) are fixedly connected between the push rod (18) and the bottom side wall of the sleeve (2).
4. The efficient grouting device for subway shield tunnel construction according to claim 3, wherein one end of the box body (1) is fixedly communicated with a grouting pipe (15) which is horizontally arranged.
5. The efficient grouting device for subway shield tunnel construction according to claim 4, wherein one end of the closed cavity (11) far away from the disc (7) is fixedly connected to the moving block (12).
6. The efficient grouting device for subway shield tunnel construction according to claim 5, wherein one end of the blanking cylinder (4) far away from the box body (1) is fixedly connected with a grouting pump (16).
7. The efficient grouting device for subway shield tunnel construction according to claim 6, wherein the push rod (18) is hinged on the stirring rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476901.4A CN114033435B (en) | 2021-12-02 | 2021-12-02 | Efficient grouting device for subway shield tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476901.4A CN114033435B (en) | 2021-12-02 | 2021-12-02 | Efficient grouting device for subway shield tunnel construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114033435A CN114033435A (en) | 2022-02-11 |
| CN114033435B true CN114033435B (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111476901.4A Active CN114033435B (en) | 2021-12-02 | 2021-12-02 | Efficient grouting device for subway shield tunnel construction |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114435411B (en) * | 2022-02-21 | 2023-05-30 | 重庆交通职业学院 | Rectangular transportation vacuum tunnel |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5131082B2 (en) * | 2008-08-08 | 2013-01-30 | 宇部興産株式会社 | Construction method of hydraulic mortar (slurry) |
| CN206352295U (en) * | 2016-11-30 | 2017-07-25 | 上海建工集团股份有限公司 | A kind of mechanical non-return horizontal reciprocating Grouting Pipe |
| CN212479263U (en) * | 2020-07-10 | 2021-02-05 | 山西安能矿山工程有限公司 | Subway shield tunnel passes through grouting equipment for river course construction |
| CN213596816U (en) * | 2020-11-05 | 2021-07-02 | 山东科达市政工程有限公司 | Grouting device is used in road and bridge construction |
| CN214660172U (en) * | 2020-12-24 | 2021-11-09 | 浙大城市学院 | Intelligent grouting device suitable for synchronous grouting and pressure flow linkage of shield tunnel |
| CN214145784U (en) * | 2020-12-30 | 2021-09-07 | 河北铸诚工矿机械有限公司 | Tunnel construction grouting pump |
| CN113027489A (en) * | 2021-04-07 | 2021-06-25 | 重庆宇隧交通设备有限公司 | Grouting device for shield machine |
| CN113605937A (en) * | 2021-09-09 | 2021-11-05 | 中国建筑第四工程局有限公司 | Continuous constant-pressure synchronous grouting device for shield tunnel construction |
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2021
- 2021-12-02 CN CN202111476901.4A patent/CN114033435B/en active Active
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