CN203688381U - Device for testing scouring corrosion resistance of test material - Google Patents
Device for testing scouring corrosion resistance of test material Download PDFInfo
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- CN203688381U CN203688381U CN201320890908.5U CN201320890908U CN203688381U CN 203688381 U CN203688381 U CN 203688381U CN 201320890908 U CN201320890908 U CN 201320890908U CN 203688381 U CN203688381 U CN 203688381U
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Abstract
The utility model discloses a device for testing scouring corrosion resistance of a test material. The device comprises a scouring box, a group of brackets, a motor and a rotation rod, wherein an upper liquid inlet and a lower liquid outlet are formed in the scouring box; a slot hole is formed in the top of the scouring box; the rotation rod penetrates through the slot hole; the group of brackets are used for mounting a group of fixed trays; the rotation speed of the rotation rod is controlled by the motor; the rotation rod stretches into the scouring box, and is located on a central axis of the scouring box; the rotation rod is sleeved with a group of sample turntables; the test turntables comprise at least one of the following structures: (1) a group of horizontal slots are uniformly formed in the edges of the sample turntables in the peripheral direction and used for storing flat samples which are plates, piece-shaped or corrugated samples; (2) areas or devices are uniformly distributed on the edges of the sample turntables in the peripheral direction and used for storing tubular samples. A group of vertical liquid blocking plates are arranged in the scouring box, and the vertical liquid blocking plates are arranged around the enclosure wall of the scouring box. The device is capable of providing a high flow rate condition and carrying out scouring corrosion resistance tests at different flow rates simultaneously.
Description
Technical field
The utility model belongs to material corrosion technical field of performance test, relates in particular to a kind of test unit of test material sherardizing steel performance.
Background technology
In the industries such as oil, chemical industry, mine, the serviceable life of the direct decision device of sherardizing steel performance of material, as copper-alloy pipe-material in power plant condenser, if normally can reach the life-span of many decades, but in actual use procedure, usually there is the phenomenon that short tour was just lost efficacy, or even occur the just phenomenon of perforation of red copper condenser pipe several months in self-feeding liquid.Trace it to its cause, mainly be the material problem of material self, such as the microstructure of material, the microstress of material, surface state of material etc., but the conventional sense that these problems are usually normally on active service early stage at material was difficult to find in (as metallographic detection, stress detect).Thereby the entry evaluation of flushing resistance is extremely important and necessary to the material for flow media, particularly contact the material of the liquid medium of high flow rate, such as for the material such as condenser pipe, heat interchanger.
The influence factor of erosion corrosion is numerous, is summed up and mainly contains the chemical property of material oneself factor, solution, the aspect such as shock and fluid flow behavior of particle.Wherein, corrode and the reciprocation research of washing away is paid much attention to always, corrode and wash away between these two kinds of effects to have obvious joint action of potentiation.Erosion corrosion research shows: erosion corrosion process and fluid mechanics are closely related, wash away general acceleration corrosion of metal process.
The method that realizes erosion corrosion mainly contains two kinds.One is that liquid medium flows, and sample coupon is fixed, and this generally realizes by pipeline test method, but this method is difficult to realize the experiment condition of high flow rate; Another kind is motionless by medium, testpieces is moving, the representative of this mode is exactly that rotating disc type washes away, and is fixed in rotary turnplate by sample coupon, and rotary turnplate is rotated in liquid medium, and medium is motionless, just form a relatively mobile trystate, this method ratio is easier to realize high flow rate, but due to turntable rotation, easily occur that medium moves with rotating disk, cause the minimizing of the relative flowing velocity of test specimen between medium.Therefore urgently there are better apparatus and method.
Utility model content
The purpose of this utility model is to provide a kind of test material sherardizing steel performance test apparatus, and this device can provide higher flow conditions, and can carry out the erosion corrosion test under different in flow rate simultaneously.
For achieving the above object, the utility model is taked following design proposal:
A kind of test material sherardizing steel performance test apparatus, it includes:
One is washed away case, and at least, with leakage fluid dram under liquid inlet on a group and a group, top is Full-open mouth or has the slotted eye passing for dwang in central area;
One pack support, for fixedly mounting one group of shaft collar, at least comprises in this group shaft collar that is positioned at a motor shaft collar that washes away case top;
A motor, is placed on motor shaft collar;
A dwang by Electric Machine Control rotating speed, this dwang from top to bottom extend into and washes away in case, and is positioned on the center axis that washes away case;
On described dwang, cover has one group of sample rotating disk, and the quantity of described one group of sample rotating disk is more than one;
Each sample rotating disk at least has the one in lower array structure: 1) in the outer rim of sample rotating disk, along the circumferential direction evenly cut one group can accommodating flat sample hugging, described flat sample is sheet material, sheet or corrugated sample; 2), on the end of the limit of each sample rotating disk, along the circumferential direction all lay region or the device of containing tube shape sample;
In case, be provided with one group of vertical liquid barrier washing away, the vertical liquid barrier of this group arranges a circle along the leg that washes away case.
In described test material sherardizing steel performance test apparatus, when the quantity of one group of sample rotating disk is when more than two, each sample rotating disk dish of different-diameter each other, and be from top to bottom spaced successively by descending diameter; Described vertical liquid barrier is stepped, and the progression of ladder is consistent with the quantity of sample rotating disk, the corresponding sample rotating disk of every grade of ladder, and every grade of vertical edge of ladder is all equal with the spacing on the corresponding outer edge of sample rotating disk.The vertical edge of described every grade of ladder and corresponding sample the rotating disk outward spacing on edge are 5-20mm.
In described test material sherardizing steel performance test apparatus, the base of the hugging of cutting in each sample rotating disk outer rim is parallel with sample rotating disk tangent to periphery, and the depth capacity of hugging is 0-5mm.
In described test material sherardizing steel performance test apparatus, build a buffering liquid groove washing away case outside, draw liquid pipeline on by this buffering liquid groove upper liquid outlet and pass to the upper liquid inlet that washes away case, draw a liquid back pipe road and pass to the liquid return hole of buffering liquid groove by the lower leakage fluid dram that washes away case, install water circulating pump at upper, liquid back pipe Lu Zhongjun, and the liquid-in pipe mouth of upper liquid pipeline is located at the half area in buffering liquid groove, the fluid mouth of pipe on liquid back pipe road is located at the upper half area in buffering liquid groove.
In described test material sherardizing steel performance test apparatus, described washes away case for circular, square, or is polygons more than five limits; When to wash away case be circular or when more than five limits polygon, the even interval of one group of described vertical liquid barrier arranges; In the time that to wash away case be square, the interval, interior edge of one group of vertical liquid barrier after arranging is even.
The utility model has the advantages that:
1. the utility model test material sherardizing steel performance test apparatus is by adding liquid barrier at washout test case sidewall, and testpieces is fixed on to rotating disk tangential direction to ensure relative velocity, retain to greatest extent the relative velocity between test specimen and medium, analogue simulation degree is high, has effectively solved pipeline type erosion corrosion device and has been difficult to realize the problem of high flow velocities;
2. on a dwang, can overlap and have multiple sample rotating disks, and by the speed governing of motor, can realize the corrosion test condition that high flow rate washes away, and can carry out the erosion corrosion test of different in flow rate simultaneously, work efficiency improves greatly.
Brief description of the drawings
Fig. 1 is the utility model test material sherardizing steel performance test apparatus structural representation (main cuing open).
Fig. 2 is the sample turntable structure schematic diagram (overlooking) that the utility model is equipped with test specimen.
Fig. 3 is that the utility model washes away box structure one embodiment schematic cross-section (the square case that washes away).
Fig. 4 is that the utility model washes away another embodiment schematic cross-section (circle is washed away case) of box structure.
Embodiment
As shown in Figure 1, for the utility model evaluating material sherardizing steel performance test apparatus one preferred embodiment, this device is mainly by motor 1, motor shaft collar 2, support 3, dwang 4, sample rotating disk 5, liquid barrier 6, wash away case 7, wash away case shaft collar 8(also can, directly will wash away case and be placed on ground), the composition such as buffering liquid groove 9, two recycle liquid pumps 10,11.
The first innovative point of the utility model evaluating material sherardizing steel performance test apparatus is: this device can be by installing the test rotating disk of multiple different-diameters, carries out the erosion corrosion test under different rotating speeds simultaneously.For this reason, the utility model has done further structural design:
The described case 7 that washes away is at least with leakage fluid dram under liquid inlet on a group and a group (can be a mouth, or multiple mouthfuls), and top is Full-open mouth or has slotted eye in central area; Utilize a pack support 3 to fix a motor shaft collar 2 and one and wash away case shaft collar 8; Motor 1 is placed on motor shaft collar, and output shaft is fixedly connected with down and with dwang 4; This dwang 4 from top to bottom extend into and washes away in case, and is positioned on the center axis that washes away case; On dwang 4, cover has the sample rotating disk 5 of more than (a group).For testing conveniently, can be equipped with a liquid feed device: comprise a surge tank 9, surge tank 9 has a upper liquid outlet and a liquid return hole, draw liquid pipeline 12 on by this buffering liquid groove upper liquid outlet and pass to the upper liquid inlet that washes away case, draw a liquid back pipe road 13 and pass to the liquid return hole of buffering liquid groove by the lower leakage fluid dram that washes away case, install water circulating pump 10,11 at upper liquid, liquid back pipe Lu Zhongjun, and the liquid-in pipe mouth 121 of upper liquid pipeline is located at the half area in buffering liquid groove 9, the fluid mouth of pipe 13 on liquid back pipe road is located at the upper half area in buffering liquid groove.
Described case 7 shapes of washing away can be square (referring to Fig. 3) or other polygons, can be also circular (referring to Fig. 4), and inwall is longitudinally evenly distributed liquid barrier 6(and establishes altogether one group).Liquid barrier 6 is 5-20mm with the spacing L1 scope on sample rotating disk 5 outer edges, ensure at 10-25mm with the spacing L2 that ensures liquid barrier and sample, realize and reduce or hinder the rotation of liquid medium with rotating disk, obtain relative motion and relative velocity between medium and sample.
When on dwang 4 simultaneously when sheathed plural sample rotating disk 5, these sample rotating disks 5 should be selected the dish of different-diameter, and are from top to bottom spaced successively by descending diameter; Under this situation, described vertical liquid barrier 6 is preferably designed for stepped, and the progression of ladder is consistent with the quantity of sample rotating disk, the corresponding sample rotating disk 5 of every grade of ladder, and every grade of vertical edge 601 of ladder is all equal with the spacing on corresponding sample rotating disk 5 outer edges.
As shown in Figure 2, described sample rotating disk 5 at least has the one in lower array structure: 1) in the outer rim of sample rotating disk 5, along the circumferential direction evenly cut one group can accommodating flat sample hugging 501, with in the time testing, flat (as: sheet material, sheet or corrugated) sample 100 is arranged on insulation mode on the limit wall of this hugging 501, be located in the tangent to periphery direction of sample rotating disk 5 outer rims, parallel with liquid medium flow direction to ensure the wash surface of flat sample 100, the depth capacity of this hugging is 0-5mm.2) on the end of the limit of each sample rotating disk, the along the circumferential direction evenly region (can directly bind tubulose sample on this region) of the accommodating tubulose sample 200 of laying or the along the circumferential direction even device (as the mechanism for accommodating and fixing tubulose sample 200) of laying accommodating tubulose sample 200.
The pipeline that washes away case 7, liquid barrier 6, buffering liquid groove 9, circulation fluid supply (upper liquid pipeline 12 and liquid back pipe road 13), dwang 4, sample rotating disk 5 and the sample of the utility model evaluating material sherardizing steel performance test apparatus are installed immobilization material and are corrosion resistant nonmetallic materials.
Below in conjunction with drawings and the specific embodiments, method of the present utility model and device are described in further details.
Embodiment 1
1, by motor 1, motor shaft collar 2, support 3, dwang 4, sample rotating disk 5, liquid barrier 6, wash away case 7, wash away case shaft collar 8, buffering liquid groove 9, two recycle liquid pumps 10,11 etc. assemble by Fig. 1.Wherein dwang, platter, sample wash away case, buffering liquid groove, circulation line and make by corrosion-resistant polytetrafluoroethylmaterial material.
2,1 test rotating disk is installed, the external profile diameter of test rotating disk is 328.3mm, and the circle diameter that test specimen is installed is 318.3mm, and the rotation girth of test specimen is 1000mm.
3, on rotating disk, press shown in Fig. 4,200 and 6 sheet testpieces 100 of 6 pipe sample testpieces are on average installed, wherein testpieces length is 60mm.
4, it is circular washing away case, and liquid case internal diameter is 500mm, and inwall is longitudinally evenly distributed 12 liquid barriers 6 by circumference, and liquid barrier width is 171.7mm, and taking the spacing that ensures liquid barrier and rotating disk as 5mm, liquid barrier can be rectangle, or be a staged.
5, install rotating disk and testpieces, be ready to test liquid medium, switch on power, adjustment motor speed is 60r/min, taking the media flow speed that realizes test specimen surface as 1m/s, by carrying out erosion corrosion test experimental period, after test, test weightlessness, calculates erosion corrosion speed.
1, by motor 1, motor shaft collar 2, support 3, dwang 4, sample rotating disk 5, liquid barrier 6, wash away case 7, wash away case shaft collar 8, buffering liquid groove 9, two recycle liquid pumps 10,11 etc. assemble by Fig. 1.Wherein dwang, platter, sample wash away case, buffering liquid groove, circulation line all has corrosion-resistant ABS plastic to make.
2,3 test rotating disks are installed simultaneously, the external profile diameter of test rotating disk is respectively 392.0mm, 328.3mm, 264.6mm, the circle diameter that test specimen is installed is respectively 382.0mm, 318.3mm, 254.6mm, and the rotation girth of test specimen is respectively 1200mm, 1000mm, 800mm.
3,6 corrugated plate shape test specimens of average installation on each rotating disk.
4, wherein experimental liquid case is square, and inwall is longitudinally evenly distributed 16 liquid barriers, and liquid barrier is three ladders, and the liquid barrier of each ladder and the spacing of rotating disk are 10mm.
5, install sample rotating disk and testpieces by Fig. 1, be ready to the liquid medium of test, switch on power, adjustment motor speed is 600r/min, to realize test specimen surface dielectric flowing velocity on sample rotating disk from top to bottom as 12m/s, 10m/s, 8m/s, by carrying out erosion corrosion test experimental period, after test, test weightlessness, calculates erosion corrosion speed.
1, by motor 1, motor shaft collar 2, support 3, dwang 4, sample rotating disk 5, liquid barrier 6, wash away case 7, wash away case shaft collar 8, buffering liquid groove 9, two recycle liquid pumps 10,11 etc. assemble by Fig. 1.Wherein dwang has teflon to make, and platter, sample wash away case, buffering liquid groove, circulation line and make by organic glass.
2,2 sample rotating disks are installed simultaneously, the circumference circle that test specimen is installed is respectively 1000mm, 500mm.
3,6 plate test coupons of average installation on 2 sample rotating disks.
4, wherein washing away case 7 is squares, and inwall is longitudinally evenly distributed 12 liquid barriers, and liquid barrier is two ladders, and the spacing of liquid barrier and rotating disk is 20mm.
5, install rotating disk and testpieces, be ready to the liquid medium of test, switch on power, adjustment motor speed is 1440r/min, to realize test specimen surface dielectric flowing velocity as 24m/s, 12m/s, by carrying out erosion corrosion test experimental period, after test, test weightlessness, calculates erosion corrosion speed.
The above; it is only preferably embodiment of the utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (6)
1. a test material sherardizing steel performance test apparatus, is characterized in that including:
One is washed away case, and at least, with leakage fluid dram under liquid inlet on a group and a group, top is Full-open mouth or has the slotted eye passing for dwang in central area;
One pack support, for fixedly mounting one group of shaft collar, at least comprises in this group shaft collar that is positioned at a motor shaft collar that washes away case top;
A motor, is placed on motor shaft collar;
A dwang by Electric Machine Control rotating speed, this dwang from top to bottom extend into and washes away in case, and is positioned on the center axis that washes away case;
On described dwang, cover has one group of sample rotating disk, and the quantity of described one group of sample rotating disk is more than one;
Each sample rotating disk at least has the one in lower array structure: 1) in the outer rim of sample rotating disk, along the circumferential direction evenly cut one group can accommodating flat sample hugging, described flat sample is sheet material, sheet or corrugated sample; 2), on the end of the limit of each sample rotating disk, along the circumferential direction all lay region or the device of containing tube shape sample;
In case, be provided with one group of vertical liquid barrier washing away, the vertical liquid barrier of this group arranges a circle along the leg that washes away case.
2. test material sherardizing steel performance test apparatus as claimed in claim 1, it is characterized in that: when the quantity of one group of sample rotating disk is when more than two, each sample rotating disk dish of different-diameter each other, and be from top to bottom spaced successively by descending diameter; Described vertical liquid barrier is stepped, and the progression of ladder is consistent with the quantity of sample rotating disk, the corresponding sample rotating disk of every grade of ladder, and every grade of vertical edge of ladder is all equal with the spacing on the corresponding outer edge of sample rotating disk.
3. test material sherardizing steel performance test apparatus as claimed in claim 2, is characterized in that: the vertical edge of described every grade of ladder and corresponding sample the rotating disk outward spacing on edge are 5-20mm.
4. test material sherardizing steel performance test apparatus as claimed in claim 3, is characterized in that: the base of the hugging of cutting in each sample rotating disk outer rim is parallel with sample rotating disk tangent to periphery, and the depth capacity of hugging is 0-5mm.
5. test material sherardizing steel performance test apparatus as claimed in claim 1, it is characterized in that: build a buffering liquid groove washing away case outside, draw liquid pipeline on by this buffering liquid groove upper liquid outlet and pass to the upper liquid inlet that washes away case, draw a liquid back pipe road and pass to the liquid return hole of buffering liquid groove by the lower leakage fluid dram that washes away case, install water circulating pump at upper liquid, liquid back pipe Lu Zhongjun, and the liquid-in pipe mouth of upper liquid pipeline is located at the half area in buffering liquid groove, the fluid mouth of pipe on liquid back pipe road is located at the upper half area in buffering liquid groove.
6. test material sherardizing steel performance test apparatus as claimed in claim 1, is characterized in that: described washes away case for circular, square, or is polygons more than five limits; When to wash away case be circular or when more than five limits polygon, the even interval of one group of described vertical liquid barrier arranges; In the time that to wash away case be square, the interval, interior edge of one group of vertical liquid barrier after arranging is even.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320890908.5U CN203688381U (en) | 2013-12-31 | 2013-12-31 | Device for testing scouring corrosion resistance of test material |
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| CN201320890908.5U CN203688381U (en) | 2013-12-31 | 2013-12-31 | Device for testing scouring corrosion resistance of test material |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105547885A (en) * | 2015-12-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Gas well erosion experimental system, erosion method thereof and flow beam adjusting device |
| CN106248514A (en) * | 2016-07-21 | 2016-12-21 | 中石化炼化工程（集团）股份有限公司 | A kind of method testing material high temperature resistant fluid scouring corrosive nature and device thereof |
| CN106370543A (en) * | 2016-11-04 | 2017-02-01 | 维新制漆（深圳）有限公司 | Testing device for simulating influence of environment on locomotive appearance performance |
| CN107063907A (en) * | 2017-03-31 | 2017-08-18 | 浙江理工大学 | A kind of experimental rig for being used to measure the abrasion of solid-liquid two-phase |
| CN107271357A (en) * | 2017-07-19 | 2017-10-20 | 昆明理工大学 | A kind of coupon alternation of wetting and drying week leaching corrosion testing apparatus |
| CN107643225A (en) * | 2017-08-07 | 2018-01-30 | 中国船舶重工集团公司第七二五研究所 | A kind of rotoflector loading corrosion fatigue test etching system and preparation method thereof |
| CN107764722A (en) * | 2017-10-13 | 2018-03-06 | 中国船舶重工集团公司第七二五研究所 | Current stabilization and the rotation erosion corrosion test device of temperature control can be achieved |
| CN108020477A (en) * | 2017-11-21 | 2018-05-11 | 合肥工业大学 | Abrasive grain wear test device |
| CN108398372A (en) * | 2018-03-26 | 2018-08-14 | 上海隧道工程有限公司 | Shield duct piece corrosion resistance test device |
| CN110231277A (en) * | 2019-06-11 | 2019-09-13 | 维新制漆（江西）有限公司 | A kind of resistance to high-intensitive multiple spot of paint film impacts weather-proof test equipment |
| CN110346233A (en) * | 2019-07-31 | 2019-10-18 | 中国人民解放军海军工程大学 | A kind of new coating flushing resistance test platform |
| CN110987698A (en) * | 2019-11-22 | 2020-04-10 | 三联泵业股份有限公司 | Be used for sediment stuff pump to flow through wear-resisting test disc device of part material |
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- 2013-12-31 CN CN201320890908.5U patent/CN203688381U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547885A (en) * | 2015-12-30 | 2016-05-04 | 中国石油天然气股份有限公司 | Gas well erosion experimental system, erosion method thereof and flow beam adjusting device |
| CN105547885B (en) * | 2015-12-30 | 2018-07-13 | 中国石油天然气股份有限公司 | Gas well erosion experimental system and its erosion method and a fluid stream regulating device |
| CN106248514A (en) * | 2016-07-21 | 2016-12-21 | 中石化炼化工程（集团）股份有限公司 | A kind of method testing material high temperature resistant fluid scouring corrosive nature and device thereof |
| CN106370543A (en) * | 2016-11-04 | 2017-02-01 | 维新制漆（深圳）有限公司 | Testing device for simulating influence of environment on locomotive appearance performance |
| CN106370543B (en) * | 2016-11-04 | 2023-09-08 | 维新制漆（江西）有限公司 | Testing device capable of simulating influence of environment on locomotive external performance |
| CN107063907A (en) * | 2017-03-31 | 2017-08-18 | 浙江理工大学 | A kind of experimental rig for being used to measure the abrasion of solid-liquid two-phase |
| CN107271357B (en) * | 2017-07-19 | 2023-07-18 | 昆明理工大学 | Metal sample wafer dry-wet alternate dip corrosion test device |
| CN107271357A (en) * | 2017-07-19 | 2017-10-20 | 昆明理工大学 | A kind of coupon alternation of wetting and drying week leaching corrosion testing apparatus |
| CN107643225A (en) * | 2017-08-07 | 2018-01-30 | 中国船舶重工集团公司第七二五研究所 | A kind of rotoflector loading corrosion fatigue test etching system and preparation method thereof |
| CN107764722A (en) * | 2017-10-13 | 2018-03-06 | 中国船舶重工集团公司第七二五研究所 | Current stabilization and the rotation erosion corrosion test device of temperature control can be achieved |
| CN108020477A (en) * | 2017-11-21 | 2018-05-11 | 合肥工业大学 | Abrasive grain wear test device |
| CN108398372A (en) * | 2018-03-26 | 2018-08-14 | 上海隧道工程有限公司 | Shield duct piece corrosion resistance test device |
| CN110231277A (en) * | 2019-06-11 | 2019-09-13 | 维新制漆（江西）有限公司 | A kind of resistance to high-intensitive multiple spot of paint film impacts weather-proof test equipment |
| CN110346233A (en) * | 2019-07-31 | 2019-10-18 | 中国人民解放军海军工程大学 | A kind of new coating flushing resistance test platform |
| CN110987698A (en) * | 2019-11-22 | 2020-04-10 | 三联泵业股份有限公司 | Be used for sediment stuff pump to flow through wear-resisting test disc device of part material |
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Effective date of registration: 20190626 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |
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Effective date of registration: 20211201 Address after: 361100 No. 327, 329, 331, tongjiyuan Tongyuan Road, Xiamen Torch hi tech Zone, Xiamen City, Fujian Province Patentee after: XIAMEN TORCH SPECIAL METALLIC MATERIALS CO.,LTD. Address before: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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Granted publication date: 20140702 Termination date: 20211231 |