CN105688469A - Filter frame of ultrahigh-pressure elastic squeezer - Google Patents
Filter frame of ultrahigh-pressure elastic squeezer Download PDFInfo
- Publication number
- CN105688469A CN105688469A CN201610189098.9A CN201610189098A CN105688469A CN 105688469 A CN105688469 A CN 105688469A CN 201610189098 A CN201610189098 A CN 201610189098A CN 105688469 A CN105688469 A CN 105688469A
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- Prior art keywords
- filter
- frame
- plate
- filter plate
- supertension
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- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 12
- 238000003466 welding Methods 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 6
- 230000007847 structural defect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 2
- 239000002002 slurry Substances 0.000 abstract 2
- 229910052755 nonmetal Inorganic materials 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
- B01D25/215—Construction of the filter plates, frames
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a filter frame of an ultrahigh-pressure elastic squeezer. The filter frame comprises a bearing plate frame and a push plate frame, a location pin shaft and a sealing spring are arranged between the bearing plate frame and the push plate frame; a filter plate installation plate is fixed to the bearing plate frame; a fixed filter plate is fixed to the filter plate installation plate; a movable filter plate is movably connected to the fixed filter plate via connection pins; a plurality of ejection springs are arranged between the movable filter plate and the fixed filter plate; and a metal sealing piece recessed inwards is arranged on the bearing plate frame, and a non-metal sealing piece projecting outwards and corresponding to the metal sealing piece is arranged on the push plate frame. The filter frame has the advantages that a problem of insufficient resistance to bending of an existing filter frame is solved; poor appearance and structural defects caused by welding problems are avoided, the workload of welding is reduced, and the processing efficiency is enhanced; the lack of automatic discharge of the existing filter frame is overcome, and the automatic degree is enhanced; the sealing performance among filter frames is enhanced, the slurry inlet pressure is increased, the slurry inlet time is shortened, and the work efficiency is improved; and equipment weight is reduced.
Description
Technical field
The invention belongs to environmental technology field, relate to a kind of device for dehydrating sladge waste, particularly to the filter frame of a kind of supertension elasticity squeezer。
Background technology
Sheet frame diaphragm filter press is a kind of equipment that material is undertaken solid-liquid separation by pressure filtration, is widely used in the industries such as food, chemical industry, environmental protection and sewage disposal, especially for the separation of viscous thin thing has the superiority of uniqueness。
Supertension elasticity squeezer is a kind of high efficiency filter press equipment, this equipment improves the structure of tradition sheet frame, collection cost of investment is low, dewatering efficiency is high, floor space is little, high treating effect, multiple advantages such as operation maintenance is simple are in one, supertension elasticity squeezer, without other twice pressing supercharging equipment and press media, reduces chamber space by spring-compressed completely, and its compression ratio is big, stress is direct, pressure is high, and the working cycle is short, and production efficiency is equivalent to 3-4 times of tradition sheet frame diaphragm filter press。
The filter frame of existing supertension elasticity squeezer, including bearing plate and pushing sheet frame (movable frame), bearing plate and the relative displacement pushed between sheet frame make chamber space change, bearing plate Chang Yinwei discontinuity in the process of extruding, make to deform in the middle of bearing plate, produce gap between bearing plate and pushing sheet frame so that material from leakage, cause that whole filter frame is scrapped。
The filter frame of existing supertension elasticity squeezer, there is also following defect:
1, filter frame bending resistance is not enough。
2, there is bad order, structural defect that Welding Problems is brought, welding job amount is big, and working (machining) efficiency is low。
3, filter frame can not automatic discharging。
4, between filter frame, sealing property is good not, enters mud pressure low, and it is long to enter the mud time, inefficiency。
5, equipment is heavy。Bearing plate and pushing sheet frame are generally adopted carbon steel material and are made, relatively costly, not corrosion-resistant, heavier-weight。
Summary of the invention
It is an object of the invention to, overcome the deficiencies in the prior art, it is provided that the filter frame of the supertension elasticity squeezer that a kind of bending resistance is strong, reasonable in design, good seal performance, automaticity are high, work efficiency is high。
It is an object of the invention to be achieved through the following technical solutions:
The filter frame of a kind of supertension elasticity squeezer, it includes pressure-bearing sheet frame and pushes sheet frame；Pressure-bearing sheet frame is flexibly connected by alignment pin between sheet frame with pushing；On same circumference, some Packing springs it are provided with between pressure-bearing sheet frame and pushing sheet frame；Filter plate installing plate is fixing with pressure-bearing sheet frame to be connected；Fixing filter plate is bolted to connection with filter plate installing plate；It is flexibly connected by connecting pin between movable filter plate with fixing filter plate；On same circumference, some ejector springs it are provided with between movable filter plate and fixing filter plate；Connecting pin and ejector spring are all passed from filter plate installing plate；Filter plate installing plate, fixing filter plate center drilling, arrange feeding-passage。
Further, pressure-bearing sheet frame outer surface is provided with the metal seal being inwardly recessed, and pushes position corresponding on sheet frame and is provided with the outwardly non-metallic seal (rubber seal) corresponding with the former。
Further, pressure-bearing sheet frame adopts section bar square tube to be made, and is cavity structure in the middle of square tube。
Further, filter plate installing plate is added middle many reinforcements and constitutes by two block plates (6mm)。
Further, movable filter plate is an entire plate, and entire plate center drilling arranges feeding-passage；Or, movable filter plate is several circular blocks；Or, movable filter plate is the two boards of split hinge-type, and namely movable filter plate is left and right two boards, is flexibly connected by upper and lower two hinges between the two boards of left and right；The center perforate of two boards mosaic, arranges feeding-passage。
Beneficial effects of the present invention:
The filter frame of the supertension elasticity squeezer of the present invention, has the advantage that
1, the problem that original filter frame bending resistance is not enough is solved。
2, solve bad order, structural defect that Welding Problems is brought, decrease welding job amount simultaneously, improve working (machining) efficiency。
3, overcome former filter frame can not the problem of automatic discharging, improve automaticity。
4, add the sealing property between filter frame, improve into mud pressure, shorten into the mud time, improve work efficiency。
5, weight of equipment is reduced。
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram (side-looking) of the filter frame of a kind of supertension elasticity squeezer of the present invention；
Fig. 2 is the metal seal in the present invention and non-metallic seal is arranged on the schematic diagram between two filter frames；
Fig. 3 is the action principle schematic diagram of the metal seal in the present invention and non-metallic seal；
Fig. 4 is the structural representation of the pressure-bearing sheet frame in the present invention and filter plate installing plate part；
Fig. 5 is the structural representation of original bearing plate；
Fig. 6 is the structure for amplifying schematic diagram of the filter plate installing plate in the present invention；
Fig. 7 is the Facad structure schematic diagram (overall ejecting type dump) of a kind of filter frame assembly in the present invention；
Fig. 8 is the filter frame side view (entering pureed state) of Fig. 7 entirety ejecting type；
Fig. 9 is the filter frame side view (discharging state) of Fig. 7 entirety ejecting type；
Figure 10 is the Facad structure schematic diagram (four ejecting type dumps) of the another kind of filter frame assembly in the present invention；
Figure 11 is the filter frame side view (entering pureed state) of tetra-ejecting types of Figure 10；
Figure 12 is the filter frame side view (discharging state) of tetra-ejecting types of Figure 10；
Figure 13 is the Facad structure schematic diagram (eight ejecting type dumps) of the another kind of filter frame assembly in the present invention；
Figure 14 is the Facad structure schematic diagram (split hinge-type dump) of the another kind of filter frame assembly in the present invention；
Figure 15 is the filter frame side view (entering pureed state) of Figure 14 split hinge-type；
Figure 16 is the filter frame side view (discharging state) of Figure 14 split hinge-type。
In figure: 1 pressure-bearing sheet frame, 2 push sheet frame, 3 alignment pin, 4 Packing springs, 5 filter plate installing plates, 6 fixing filter plates, 7 connecting pins, 8 movable filter plates, 9 ejector springs, 10 feeding-passages, 11 metal seals, 12 non-metallic seal, 13 square tubes, 14 cavity structures, 15 reinforcements, 16 filter clothes, 17 ear shoulders, 18 running rollers, 19 hinges, 20 girders
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated。
Embodiment
As it is shown in figure 1, the filter frame of a kind of supertension elasticity squeezer of the present invention, it includes pressure-bearing sheet frame 1 and pushes sheet frame 2；Pressure-bearing sheet frame 1 is flexibly connected by alignment pin 3 between sheet frame 2 with pushing；On same circumference, some Packing springs 4 it are provided with between pressure-bearing sheet frame 1 and pushing sheet frame 2；Filter plate installing plate 5 is fixing with pressure-bearing sheet frame 1 is connected (welding)；Fixing filter plate 6 is bolted to connection with filter plate installing plate 5；It is flexibly connected by connecting pin 7 between movable filter plate 8 with fixing filter plate 6；On same circumference, some ejector springs 9 it are provided with between movable filter plate 8 and fixing filter plate 6；Connecting pin 7 and ejector spring 9 are all passed from filter plate installing plate 5；Filter plate installing plate 5, fixing filter plate 6 center drilling, arrange feeding-passage 10。
As shown in Figure 2 and Figure 3, pressure-bearing sheet frame 1 outer surface is provided with the metal seal 11 being inwardly recessed, pushes position corresponding on sheet frame 2 and the outwardly non-metallic seal 12 (rubber seal) corresponding with the former is installed。
As shown in Figure 4, pressure-bearing sheet frame 1 adopts section bar square tube 13 to be made, and is cavity structure 14 in the middle of square tube 13。
As shown in Figure 6, filter plate installing plate 5 is added middle many reinforcements 15 and constitutes by the steel plate of two pieces of 6mm。
As it is shown in fig. 7, movable filter plate 8 is an entire plate, entire plate center drilling arranges feeding-passage 10；Or, as shown in Figure 10, Figure 13, movable filter plate 8 is several circular blocks；Or, as shown in figure 14, movable filter plate 8 is the left and right two boards of split hinge-type, is flexibly connected by upper and lower two hinges 19 between the two boards of left and right, and the center perforate of two boards mosaic arranges feeding-passage 10。The movable filter plate that refers to of split hinge-type has two pieces, a left and right, middle is flexibly connected (can relatively rotate) by upper and lower two hinges。
As shown in Fig. 7, Figure 10, Figure 13, Figure 14, the filter frame assembly of the present invention is arranged on the girder 20 of supertension elasticity squeezer by ear shoulder 17 and running roller 18。
The filter frame of the supertension elasticity squeezer of the present invention, has the advantage that
1, the problem that original filter frame bending resistance is not enough is solved。
Under the combined effect that mud impacts with mud flow differential pressure, whole filter frame can produce the phenomenon to pressure-bearing sheet frame and filter plate installing plate curving。
Existing structure adds compared with the filter frame intensity of original structure, improves bending resistance。
Filter plate installing plate, former is individual plates 12mm, is stiffened panel (i.e. many reinforcements 15) in the middle of two blocks of 6mm plates now, and (see Fig. 6) becomes now a casing, increase accordingly under few premise at cost。
2, bad order, structural defect that Welding Problems is brought are solved。
Pressure-bearing sheet frame, original structure is the layer structure of multilayer steel plates assembly welding, and outward appearance exists weld seam；Present structure is directly to adopt section bar square tube, and lateral surface need not weld, and presentation quality is good。
A original structure (Fig. 5): multiple field Welding Structure。
B existing structure (Fig. 4): middle cavity structure。
3, by arranging ejector spring between fixing filter plate and movable filter plate, it is achieved that filter cake drops (spring dump) automatically, overcome former filter frame can not the problem of automatic discharging, improve automaticity。(schematic diagram 3)
1) when entering mud, being subdued by movable filter plate under the effect of mud pressure, ejector spring 9 is compressed, spring energy-storage；
2) during dump, it does not have the pressure effect of mud, discharging spring energy, ejector spring 9 resilience is stretched, and is laid down by mud cake automatic ejection。
Pressure size suffered by mud cake, takes three kinds of dump modes:
A () overall ejecting type dump, as Figure 7-9, movable filter plate is an entire plate of central aperture；
B () piecemeal ejecting type dump, as shown in figures 10-13, movable filter plate is that (in Figure 10, movable filter plate is four circular blocks to several circular blocks, is four ejecting type dumps；In Figure 13, movable filter plate is eight circular blocks, is eight ejecting type dumps)；
C () split hinge-type dump, as illustrated in figures 14-16, movable filter plate is the left and right two boards of split hinge-type, is flexibly connected by upper and lower two hinges 19 between the two boards of left and right。
4, add sealing property, improve into mud pressure, shorten into the mud time, improve work efficiency。
On pressure-bearing sheet frame outer surface, surrounding is provided with the metal seal 11 being inwardly recessed, and pushes position corresponding on sheet frame and is provided with the outwardly non-metallic seal 12 (rubber seal) corresponding with the former。Metal seal 11 on pressure-bearing sheet frame, closes with the matching form of the non-metallic seal 12 pushed on sheet frame。During the work of supertension elasticity squeezer, metal seal 11 on the pressure-bearing sheet frame of a certain filter frame, matches with the non-metallic seal 12 (as it is shown on figure 3, being spaced two-layer filter cloth 16 between the two) pushed on sheet frame of adjacent filter frame, achieve sealing, enhance sealing property。
Push the sealing member on sheet frame and adopt nonmetallic materials (rubber); having ductility, can close with the matching form of the metal seal on pressure-bearing sheet frame well during sealing, non-metallic seal is softer simultaneously; filter cloth can be protected well, improve the filter cloth life-span。
5, weight of equipment is reduced。Pressure-bearing sheet frame is internal adopts cavity structure, and weight is greatly reduced。
Claims (9)
1. the filter frame of a supertension elasticity squeezer, it is characterised in that it includes pressure-bearing sheet frame and pushes sheet frame；Pressure-bearing sheet frame is flexibly connected by alignment pin between sheet frame with pushing；On same circumference, some Packing springs it are provided with between pressure-bearing sheet frame and pushing sheet frame；Filter plate installing plate is fixing with pressure-bearing sheet frame to be connected；Fixing filter plate is bolted to connection with filter plate installing plate；It is flexibly connected by connecting pin between movable filter plate with fixing filter plate；On same circumference, some ejector springs it are provided with between movable filter plate and fixing filter plate；Connecting pin and ejector spring are all passed from filter plate installing plate；Filter plate installing plate, fixing filter plate center drilling, arrange feeding-passage。
2. the filter frame of supertension elasticity squeezer as claimed in claim 1, it is characterised in that pressure-bearing sheet frame outer surface is provided with the metal seal being inwardly recessed, pushes position corresponding on sheet frame and is provided with the outwardly non-metallic seal corresponding with the former。
3. the filter frame of supertension elasticity squeezer as claimed in claim 1 or 2, it is characterised in that pressure-bearing sheet frame adopts section bar square tube to be made, and is cavity structure in the middle of square tube。
4. the filter frame of supertension elasticity squeezer as claimed in claim 3, it is characterised in that filter plate installing plate is added middle many reinforcements and constitutes by two block plates。
5. the filter frame of supertension elasticity squeezer as claimed in claim 4, it is characterised in that filter plate installing plate is added middle many reinforcements and constitutes by the steel plate of two pieces of 6mm。
6. the filter frame of supertension elasticity squeezer as claimed in claim 1 or 2, it is characterised in that movable filter plate is an entire plate, and entire plate center drilling arranges feeding-passage。
7. the filter frame of supertension elasticity squeezer as claimed in claim 1 or 2, it is characterised in that movable filter plate is the two boards of split hinge-type, and namely movable filter plate is left and right two boards, is flexibly connected by upper and lower two hinges between the two boards of left and right；The center perforate of two boards mosaic, arranges feeding-passage。
8. the filter frame of supertension elasticity squeezer as claimed in claim 1 or 2, it is characterised in that movable filter plate is several circular blocks。
9. the filter frame of supertension elasticity squeezer as claimed in claim 8, it is characterised in that movable filter plate is four or eight circular blocks。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189098.9A CN105688469B (en) | 2016-03-29 | 2016-03-29 | A kind of filter frame of superelevation compression elasticity squeezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189098.9A CN105688469B (en) | 2016-03-29 | 2016-03-29 | A kind of filter frame of superelevation compression elasticity squeezer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105688469A true CN105688469A (en) | 2016-06-22 |
| CN105688469B CN105688469B (en) | 2017-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610189098.9A Active CN105688469B (en) | 2016-03-29 | 2016-03-29 | A kind of filter frame of superelevation compression elasticity squeezer |
Country Status (1)
| Country | Link |
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| CN (1) | CN105688469B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249731A (en) * | 2018-05-04 | 2018-07-06 | 湖北合加环境设备有限公司 | The self-locking device and filter plate of electro-osmosis sludge high-dry dewaterer filter chamber |
| CN114146461A (en) * | 2021-12-10 | 2022-03-08 | 湖北省轻工业科学研究设计院有限公司 | Novel filter plate structure of filter press |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4749482A (en) * | 1985-06-08 | 1988-06-07 | Eberhard Hoesch & Sohne Gmbh | Membrane plate for plate filter presses |
| CN202643527U (en) * | 2012-06-28 | 2013-01-02 | 王忱 | Elastomer pre-compaction press filter unit and presser |
| CN203408519U (en) * | 2013-08-14 | 2014-01-29 | 上海奥德水处理科技有限公司 | Plate-frame filter press with automatic unloading function |
| CN104147827A (en) * | 2014-08-19 | 2014-11-19 | 佛山市金凯地过滤设备有限公司 | Smoothly operated compressor automatic discharging system |
| CN205613110U (en) * | 2016-03-29 | 2016-10-05 | 上海同臣环保有限公司 | Filter frame of superhigh pressure elasticity squeezer |
-
2016
- 2016-03-29 CN CN201610189098.9A patent/CN105688469B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4749482A (en) * | 1985-06-08 | 1988-06-07 | Eberhard Hoesch & Sohne Gmbh | Membrane plate for plate filter presses |
| CN202643527U (en) * | 2012-06-28 | 2013-01-02 | 王忱 | Elastomer pre-compaction press filter unit and presser |
| CN203408519U (en) * | 2013-08-14 | 2014-01-29 | 上海奥德水处理科技有限公司 | Plate-frame filter press with automatic unloading function |
| CN104147827A (en) * | 2014-08-19 | 2014-11-19 | 佛山市金凯地过滤设备有限公司 | Smoothly operated compressor automatic discharging system |
| CN205613110U (en) * | 2016-03-29 | 2016-10-05 | 上海同臣环保有限公司 | Filter frame of superhigh pressure elasticity squeezer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249731A (en) * | 2018-05-04 | 2018-07-06 | 湖北合加环境设备有限公司 | The self-locking device and filter plate of electro-osmosis sludge high-dry dewaterer filter chamber |
| CN108249731B (en) * | 2018-05-04 | 2023-06-13 | 启迪合加新能源汽车有限公司 | Self-locking device and filter plate of filter chamber of electroosmosis sludge high-dry dehydrator |
| CN114146461A (en) * | 2021-12-10 | 2022-03-08 | 湖北省轻工业科学研究设计院有限公司 | Novel filter plate structure of filter press |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105688469B (en) | 2017-07-11 |
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Application publication date: 20160622 Assignee: Shanghai Puchuang Longke Finance Leasing Co.,Ltd. Assignor: SHANGHAI TECHASE ENVIRONMENT PROTECTION Co.,Ltd. Contract record no.: X2020980003232 Denomination of invention: Filter frame of ultrahigh-pressure elastic squeezer Granted publication date: 20170711 License type: Exclusive License Record date: 20200618 |
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Denomination of invention: Filter frame of ultrahigh-pressure elastic squeezer Effective date of registration: 20200618 Granted publication date: 20170711 Pledgee: Shanghai Puchuang Longke Finance Leasing Co.,Ltd. Pledgor: SHANGHAI TECHASE ENVIRONMENT PROTECTION Co.,Ltd. Registration number: Y2020980003235 |
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Assignee: Shanghai Puchuang Longke Finance Leasing Co.,Ltd. Assignor: SHANGHAI TECHASE ENVIRONMENT PROTECTION Co.,Ltd. Contract record no.: X2020980003232 Date of cancellation: 20210108 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210108 Granted publication date: 20170711 Pledgee: Shanghai Puchuang Longke Finance Leasing Co.,Ltd. Pledgor: SHANGHAI TECHASE ENVIRONMENT PROTECTION Co.,Ltd. Registration number: Y2020980003235 |
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Denomination of invention: A filter frame for an ultra-high pressure elastic press Granted publication date: 20170711 Pledgee: Hongkou Branch of Shanghai Rural Commercial Bank Co.,Ltd. Pledgor: SHANGHAI TECHASE ENVIRONMENT PROTECTION Co.,Ltd. Registration number: Y2024310000251 |