CN219483675U - Shield constructs soil bin flushing device - Google Patents
Shield constructs soil bin flushing device Download PDFInfo
- Publication number
- CN219483675U CN219483675U CN202320434677.0U CN202320434677U CN219483675U CN 219483675 U CN219483675 U CN 219483675U CN 202320434677 U CN202320434677 U CN 202320434677U CN 219483675 U CN219483675 U CN 219483675U
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- China
- Prior art keywords
- flushing
- soil bin
- groups
- shield
- bin body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 91
- 239000002689 soil Substances 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000007790 scraping Methods 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 5
- 238000009991 scouring Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003491 array Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a shield soil bin flushing device in the technical field of shield construction equipment, which comprises a soil bin body, wherein a flushing mechanism is arranged in the soil bin body, the flushing mechanism comprises a flushing component, a scraping component is sleeved outside the flushing component, a flushing cavity is formed in the soil bin body, a driving motor is further arranged on one side of the top of the inner cavity of the flushing cavity, a plurality of groups of circumferentially-arrayed high-pressure flushing spray heads are additionally arranged on the outer side of a circular water tank, the inner wall of the soil bin body can be subjected to covering type dead-angle-free flushing and cleaning treatment, the two ends of the inner cavity of the circular water tank are additionally provided with water filtering nets, the introduced clean water can also play a role of filtering impurities, the condition that the high-pressure flushing spray heads are blocked can be avoided, and the scraping component sleeved outside the flushing component is matched, so that the inner wall of the soil bin body after flushing can be scraped and cleaned, and the working efficiency of the flushing mechanism for cleaning the inner wall of the soil bin body can be improved.
Description
Technical Field
The utility model relates to the technical field of shield construction equipment, in particular to a shield soil bin flushing device.
Background
The shield method is a fully mechanized construction method in the construction of the undermining method. The shield machine is propelled in the ground, and collapse in the tunnel is prevented by the shield shell and surrounding rocks around the pipe piece support. And meanwhile, soil body excavation is carried out by using a cutting device in front of an excavation face, the soil body is transported out of a tunnel through a soil-discharging machine, the soil body is pressurized and jacked in the rear part by using a jack, and precast concrete segments are assembled to form the mechanized construction method of the tunnel structure.
In the shield tunnel construction process, because dregs such as cohesive soil, silty clay, gravel layers, round gravel and the like are easy to accumulate in the lower part of the soil bin, mud cakes are easy to form, the torque of a shield cutter disc is increased, the shield tunneling speed is low, the shield can be stopped for a long time when serious, and great loss is brought to engineering construction, therefore, the bin is required to be opened for flushing after the accumulation of the dregs, but a common flushing device is complex in operation when flushing the inside of the soil bin, and the efficiency is lower when flushing the inside of the soil bin, so that the construction period of engineering construction is influenced.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.
Therefore, the utility model aims to provide the shield soil bin flushing device which can solve the problems that the traditional flushing device is complicated in operation and low in flushing work efficiency for the interior of a soil bin.
In order to solve the technical problems, the utility model provides a shield soil bin flushing device, which adopts the following technical scheme: the soil bin comprises a soil bin body, wherein a scouring mechanism is arranged in the soil bin body;
the flushing mechanism comprises a flushing assembly, and a scraping assembly is sleeved outside the flushing assembly;
the inside of soil bin organism has seted up the scour cavity, the inner chamber top one side of scour cavity still installs driving motor.
Through adopting above-mentioned technical scheme, this scheme through the metal hollow rod that installs respectively at circular water tank both ends, can be with circular water tank spacing installation in the inside of soil bin organism, can also play the effect of movable support to the cover and establish the outside scraping assembly who scrapes of installing at circular water tank, simultaneously, can also pour into the inside of circular water tank with clean water, cooperate the filter screen that installs additional at circular water tank inner chamber both ends, can also play impurity filtering's effect to the clean water of introducing, can avoid the high pressure to wash out the condition that the shower nozzle appears blocking;
according to the scheme, through the high-pressure flushing spray heads which are additionally arranged on the outer side of the circular water tank and distributed in a plurality of groups of circumferential arrays, the inner wall of the soil bin body can be subjected to covering type dead-angle-free flushing cleaning treatment, through the belt pulleys which are additionally arranged on the outer side of the mounting plate and the output end of the driving motor respectively and the transmission belts between the two groups of belt pulleys, when the driving motor is electrified, the scraping assembly can be driven to rotate outside the circular water tank, and as the triangular scraping plate is in contact fit with the inner wall of the soil bin body, the inner wall of the flushed soil bin body can be scraped and cleaned, and impurities such as viscous soil attached to the periphery of the inner wall of the soil bin body can be scraped;
according to the shield soil bin flushing device, the structural design is novel, in the using process, the high-pressure flushing spray heads distributed in the circumferential arrays are additionally arranged outside the circular water tank, the inner wall of the soil bin body can be subjected to the covering type no-dead-angle flushing cleaning treatment, the introduced cleaning water can also have the effect of filtering impurities through the water filtering nets additionally arranged at the two ends of the inner cavity of the circular water tank, the condition that the high-pressure flushing spray heads are blocked can be avoided, the high-pressure flushing spray heads are matched with the scraping assembly sleeved outside the flushing assembly, the inner wall of the soil bin body after flushing can be scraped and cleaned, and therefore the working efficiency of the flushing mechanism on the inside of the soil bin body can be improved.
Optionally, the scraping component comprises a mounting plate, a plurality of groups of supporting plates are arranged between the two groups of mounting plates, and cleaning components are further connected to the outer sides of the plurality of groups of supporting plates.
Through adopting above-mentioned technical scheme, this scheme is through the clean part at the support plate outside additional installation, can strike off the effect of clearance to impurities such as the sticked soil that soil bin organism inner wall is attached.
Optionally, the flushing assembly comprises a circular water tank, metal hollow rods are arranged at two ends of the circular water tank, a plurality of groups of water guide plates distributed in a circumferential array are arranged on the outer side of the circular water tank, and a plurality of groups of high-pressure flushing spray heads are arranged on the outer side of the water guide plates.
Through adopting above-mentioned technical scheme, this scheme is through the high pressure scour nozzle that a plurality of groups circumference array of installing additional in the water guide plate outside distributes, can carry out the scour cleaning treatment at covering formula no dead angle to the inner wall of soil bin organism.
Optionally, the belt pulley is all installed to the outside of one of them a set of installation plate and driving motor's output, two sets of be connected with driving belt between the belt pulley, the connection through-hole has all been seted up in the middle part of belt pulley and two sets of installation plate, connection through-hole and metal hollow rod structure phase-match.
Through adopting above-mentioned technical scheme, this scheme is through installing the belt pulley of plate outside and driving motor output additional installation respectively to and driving belt between two sets of belt pulleys, when driving motor under the condition of circular telegram, can drive and strike off the outside rotation of subassembly at circular water tank, because of for contact cooperation between the inner wall of triangle scraper blade and the soil bin organism, can strike off clean processing to the soil bin organism inner wall after the washing away, can strike off impurity such as stickness soil attached to soil bin organism inner wall all around.
Optionally, the T-shaped clamping grooves are formed in the outer sides of the support plate members in a plurality of groups.
Through adopting above-mentioned technical scheme, this scheme is through the T type draw-in groove of seting up in the support plate outside for clean part's dismouting is connected.
Optionally, the cleaning component comprises a triangular scraper, and a T-shaped clamping plate is arranged in the middle of one side of the triangular scraper.
Through adopting above-mentioned technical scheme, this scheme can be with triangle scraper blade joint connection in the outside of supporting plate through the T type draw-in groove of seting up in the supporting plate outside.
Optionally, the triangular scraping plate is in contact fit with the inner wall of the soil bin body.
By adopting the technical scheme, as the triangular scraping plate is in contact fit with the inner wall of the soil bin body, the triangular scraping plate can scrape impurities such as cohesive soil attached to the periphery of the inner wall of the soil bin body.
Optionally, the T-shaped clamping plate is matched with the T-shaped clamping groove in structure, and the T-shaped clamping plate is matched with the T-shaped clamping groove in a clamping way.
Through adopting above-mentioned technical scheme, because of being the joint cooperation between T type cardboard and the T type draw-in groove, when the backup pad can carry out dismouting connection and maintenance change operation to clean part according to the service condition, can also effectually promote the stability of connecting between the two.
Optionally, the inside of circular water tank has seted up the water storage cavity, the drainage net is all installed at the inner chamber both ends of water storage cavity, the inner wall of water storage cavity is provided with a plurality of groups circumference array distribution's scour pump case all around, and a plurality of groups the bottom of scour pump case still is provided with a plurality of groups of drinking-water pipes.
Through adopting above-mentioned technical scheme, this scheme is through the drainage net that installs additional respectively at water storage cavity inner chamber both ends, can play impurity filterable effect to the clean water of introducing, can also avoid the high pressure to wash away the shower nozzle and appear blocking up the condition.
Optionally, the circular water tank further comprises a plurality of groups of flushing pump boxes arranged on the periphery of the inner wall of the water storage cavity, and a plurality of groups of water pumping pipes are arranged at the bottoms of the flushing pump boxes.
Through adopting above-mentioned technical scheme, this scheme is through washing pump box and the drinking-water pipe of installing additional all around at circular water tank inner wall for the extraction and the pressure boost of clean water are carried, make clean water can spray out from the high pressure washing shower nozzle that the water guide plate surface was installed additional.
In summary, the present utility model includes at least one of the following beneficial effects: the shield soil bin flushing device is novel in structural design, in the using process, through the high-pressure flushing spray heads which are additionally arranged on the outer side of the circular water tank and distributed in a plurality of groups of circumferential arrays, the inner wall of the soil bin body can be subjected to the covering type no dead angle flushing and cleaning treatment, through the water filtering net additionally arranged at the two ends of the inner cavity of the circular water tank, the introduced clean water can also play an impurity filtering role, the condition that the high-pressure flushing spray heads are blocked can be avoided, the high-pressure flushing spray heads are matched with the scraping assembly sleeved outside the flushing assembly, and the inner wall of the flushed soil bin body can be scraped and cleaned, so that the working efficiency of the flushing mechanism to the inside of the soil bin body can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of a flushing mechanism according to the present utility model;
FIG. 3 is a schematic view of a circular tank structure of the present utility model;
FIG. 4 is a schematic view of a scraping assembly according to the present utility model;
FIG. 5 is a schematic view of the cleaning member structure of the present utility model;
fig. 6 is a schematic view of a water storage cavity structure of the present utility model.
Reference numerals illustrate: 100. a soil bin body; 101. flushing the cavity; 102. a driving motor; 200. a flushing mechanism; 201. a flushing assembly; 201a, a circular water tank; 201a-1, a water storage cavity; 201a-2, a water filter screen; 201a-3, flushing the pump housing; 201a-4, a water suction pipe; 201b, a metal hollow rod; 201c, a water guide plate; 201d, high-pressure flushing spray heads; 202. a scraping assembly; 202a, mounting a plate; 202a-1, pulley; 202a-2, connection vias; 202b, supporting the plate; 202b-1, T-shaped card slot; 202c, cleaning components; 202c-1, triangular scrapers; 202c-2, T-clamp.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-6.
Referring to fig. 1-2, the utility model discloses a shield soil bin flushing device,
comprises a soil bin body 100, wherein a scouring mechanism 200 is arranged in the soil bin body 100;
the flushing mechanism 200 comprises a flushing assembly 201, and a scraping assembly 202 is sleeved outside the flushing assembly 201;
a scouring cavity 101 is formed in the soil bin body 100, and a driving motor 102 is further arranged on one side of the top of the inner cavity of the scouring cavity 101.
The scraping assembly 202 comprises mounting plates 202a, a plurality of groups of supporting plates 202b are arranged between the two groups of mounting plates, cleaning components 202c are further connected to the outer sides of the groups of supporting plates 202b, and impurities such as cohesive soil attached to the inner wall of the soil bin body 100 can be scraped and cleaned through the cleaning components 202c additionally arranged on the outer sides of the supporting plates 202 b.
In the second embodiment, referring to fig. 3 to 4, in order to solve the problem that the conventional flushing device is complicated to operate and has low flushing efficiency for the interior of the soil bin, based on the same concept as that of the first embodiment, the shield soil bin flushing device further includes:
the flushing assembly 201 comprises a circular water tank 201a, metal hollow rods 201b are arranged at two ends of the circular water tank 201a, a plurality of groups of water guide plates 201c distributed in a circumferential array are arranged on the outer side of the circular water tank 201a, a plurality of groups of high-pressure flushing spray heads 201d are arranged on the outer side of the plurality of groups of water guide plates 201c, and the inner wall of the soil bin body 100 can be subjected to covering type dead-angle-free flushing and cleaning treatment through the plurality of groups of high-pressure flushing spray heads 201d distributed in the circumferential array.
The belt pulleys 202a-1 are arranged on the outer side of one group of the installation plate 202a and the output end of the driving motor 102, a transmission belt is connected between the two groups of belt pulleys 202a-1, the belt pulleys 202a-1 and the middle parts of the two groups of installation plate 202a are respectively provided with a connecting through hole 202a-2 in a penetrating way, the connecting through holes 202a-2 are matched with the metal hollow rod 201b in structure, the belt pulleys 202a-1 respectively arranged on the outer side of the installation plate 202a and the output end of the driving motor 102, and the transmission belt between the two groups of belt pulleys 202a-1 can drive the scraping assembly 202 to rotate outside the circular water tank 201a under the condition that the driving motor 102 is electrified, and as the triangular scraping plate 202c-1 is in contact fit with the inner wall of the soil bin body 100, the washed inner wall of the soil bin body 100 can be scraped and cleaned, and impurities such as viscous soil attached to the periphery of the inner wall of the soil bin body 100 can be scraped.
T-shaped clamping grooves 202b-1 are formed in the outer sides of the plurality of groups of support plate members 202b, and the T-shaped clamping grooves 202b-1 formed in the outer sides of the support plate members 202b are used for dismounting and connecting the cleaning parts 202 c.
Referring to fig. 5-6, in order to solve the problem that the conventional flushing device is complicated to operate and has low flushing efficiency for the interior of the soil bin in this embodiment, based on the same concept as that of the first embodiment, the shield soil bin flushing device further includes:
the cleaning component 202c includes a triangular scraper 202c-1, a T-shaped clamping plate 202c-2 is disposed in the middle of one side of the triangular scraper 202c-1, so that the triangular scraper 202c-1 can be connected to the outer side of the supporting plate 202b in a clamping manner, and the triangular scraper 202c-1 is in contact fit with the inner wall of the soil bin body 100, so that the triangular scraper 202c-1 can scrape impurities such as viscous soil attached to the periphery of the inner wall of the soil bin body 100 due to the contact fit between the triangular scraper 202c-1 and the inner wall of the soil bin body 100.
The T-shaped clamping plate 202c-2 is matched with the T-shaped clamping groove 202b-1 in structure, the T-shaped clamping plate 202c-2 is matched with the T-shaped clamping groove 202b-1 in a clamping manner, and the supporting plate 202b can effectively improve the stability of connection between the T-shaped clamping plate 202c-2 and the T-shaped clamping groove 202b-1 while carrying out dismounting connection, maintenance and replacement operation on the cleaning component 202c according to the use condition.
The inside of the circular water tank 201a is provided with a water storage cavity 201a-1, both ends of the inner cavity of the water storage Shui Kongqiang a-1 are provided with water filtering nets 201a-2, and the introduced clean water can be filtered by impurities through the water filtering nets 201a-2 which are respectively arranged at both ends of the inner cavity of the water storage cavity 201a-1, so that the situation that the high-pressure flushing nozzle 201d is blocked can be avoided.
The circular water tank 201a further comprises a plurality of groups of flushing pump boxes 201a-3 arranged on the periphery of the inner wall of the water storage cavity 201a-1, a plurality of groups of water pumping pipes 201a-4 are arranged at the bottoms of the groups of flushing pump boxes 201a-3, and the flushing pump boxes 201a-3 and the water pumping pipes 201a-4 which are additionally arranged on the periphery of the inner wall of the circular water tank 201a are used for pumping and pressurizing conveying cleaning water, so that the cleaning water can be sprayed out from a high-pressure flushing spray head 201d additionally arranged on the surface of the water guide plate 201 c.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (10)
1. The utility model provides a shield constructs soil storehouse washing unit, includes soil storehouse organism (100), its characterized in that: a scouring mechanism (200) is arranged in the soil bin body (100);
the flushing mechanism (200) comprises a flushing assembly (201), and a scraping assembly (202) is sleeved outside the flushing assembly (201);
the soil bin is characterized in that a flushing cavity (101) is formed in the soil bin body (100), and a driving motor (102) is further arranged on one side of the top of the inner cavity of the flushing cavity (101).
2. The shield soil bin flushing device of claim 1, wherein: the scraping assembly (202) comprises a mounting plate (202 a), a plurality of groups of supporting plate (202 b) are arranged between the two groups of mounting plate, and cleaning parts (202 c) are further connected to the outer sides of the groups of supporting plate (202 b).
3. The shield soil bin flushing device of claim 2, wherein: the flushing assembly (201) comprises a circular water tank (201 a), metal hollow rods (201 b) are arranged at two ends of the circular water tank (201 a), a plurality of groups of water guide plates (201 c) distributed in a circumferential array are arranged on the outer side of the circular water tank (201 a), and a plurality of groups of high-pressure flushing spray heads (201 d) are arranged on the outer side of the water guide plates (201 c).
4. A shield soil bin flushing device as claimed in claim 3, wherein: the belt pulleys (202 a-1) are arranged on the outer sides of one group of the mounting plate members (202 a) and the output end of the driving motor (102), a transmission belt is connected between the two groups of the belt pulleys (202 a-1), connecting through holes (202 a-2) are formed in the middles of the belt pulleys (202 a-1) and the two groups of the mounting plate members (202 a) in a penetrating mode, and the connecting through holes (202 a-2) are matched with the metal hollow rod (201 b) in structure.
5. The shield soil bin flushing device of claim 4, wherein: t-shaped clamping grooves (202 b-1) are formed in the outer sides of the plurality of groups of support plate pieces (202 b).
6. The shield soil bin flushing device of claim 5, wherein: the cleaning component (202 c) comprises a triangular scraping plate (202 c-1), and a T-shaped clamping plate (202 c-2) is arranged in the middle of one side of the triangular scraping plate (202 c-1).
7. The shield soil bin flushing device of claim 6, wherein: the triangular scraping plate (202 c-1) is in contact fit with the inner wall of the soil bin body (100).
8. The shield soil bin flushing device of claim 7, wherein: the T-shaped clamping plate (202 c-2) is matched with the T-shaped clamping groove (202 b-1) in structure, and the T-shaped clamping plate (202 c-2) is in clamping fit with the T-shaped clamping groove (202 b-1).
9. The shield soil bin flushing device of claim 8, wherein: a water storage cavity (201 a-1) is formed in the circular water tank (201 a), and water filtering nets (201 a-2) are arranged at two ends of an inner cavity of the water storage cavity (201 a-1).
10. The shield soil bin flushing device of claim 9, wherein: the circular water tank (201 a) further comprises a plurality of groups of flushing pump boxes (201 a-3) arranged on the periphery of the inner wall of the water storage cavity (201 a-1), and a plurality of groups of water pumping pipes (201 a-4) are arranged at the bottoms of the groups of flushing pump boxes (201 a-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434677.0U CN219483675U (en) | 2023-03-09 | 2023-03-09 | Shield constructs soil bin flushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434677.0U CN219483675U (en) | 2023-03-09 | 2023-03-09 | Shield constructs soil bin flushing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219483675U true CN219483675U (en) | 2023-08-08 |
Family
ID=87507213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320434677.0U Active CN219483675U (en) | 2023-03-09 | 2023-03-09 | Shield constructs soil bin flushing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219483675U (en) |
-
2023
- 2023-03-09 CN CN202320434677.0U patent/CN219483675U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 1103, Building F (Building 3), Xinfa Huirong Plaza, Xinwu District, Wuxi City, Jiangsu Province, China Patentee after: China Railway 17th Bureau Group Municipal Construction Co.,Ltd. Address before: 200063 Room 203, 2nd floor, No.11 Lane 1888, Caoyang Road, Putuo District, Shanghai -k Patentee before: CHINA RAILWAY 17TH BUREAU GROUP SHANGHAI RAIL TRANSIT ENGINEERING CO.,LTD. |