CN2748172Y - Stack up type planet ring grinding machine - Google Patents
Stack up type planet ring grinding machine Download PDFInfo
- Publication number
- CN2748172Y CN2748172Y CN 200420069444 CN200420069444U CN2748172Y CN 2748172 Y CN2748172 Y CN 2748172Y CN 200420069444 CN200420069444 CN 200420069444 CN 200420069444 U CN200420069444 U CN 200420069444U CN 2748172 Y CN2748172 Y CN 2748172Y
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- cylindrical shell
- muller
- half cylindrical
- ring
- axle
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Abstract
The utility model discloses a stack up type planet ring grinding machine, comprising a driving device, a feed hopper, a grinding body, a discharge hopper and a machine frame; the feed hopper is arranged at the upper part of the grinding body, and the discharge hopper is arranged at the lower part of the grinding body; the grinding body is composed of a cylinder which is dimidiate on the left and the right, a main shaft, an even tray, a roller ring, a screen plate, a suspending type roller wheel assembly, a climbing mechanism, an upper cover and a bottom seat; the roller wheel rolls along the roller ring, rotates around the roller wheel shaft, and makes planetary motion around the main shaft; the roller wheel makes circumferential motion to generate centrifugal force which acts on the roller ring so that the rolling roller pressure which is far greater than the self weight of the roller wheel is formed and the function of driving the roller ring to move is small, and thus the purpose of energy conservation is achieved; when the damage part is overhauled or replaced in the grinding body, the climbing mechanism can make the cylinder, the upper cover and the bottom seat form a clearance gap, the two cylinders can respectively rotate 240 degree around the climbing shaft, and the equipment maintenance is convenient; The utility model is a grinding machine with controllable grinding rate which is folded by multi-layer grinding process and processes powder by the planetary motion of the roller wheel; the stack up type planet ring grinding machine can be widely used for powder preparation in the industry of mine, manufacture of building materials, ceramics, chemical industry, electric force, coal and foodstuffs.
Description
Technical field:
The utility model relates to the machinery that a kind of element of milling of using roller and ring teamwork is pulverized, and is specifically related to the stacking type planetary annular grinder.
Background technology:
The modern normal grinding machine equipment that uses of powder industry mainly contains: mill, sand milling, roller bowl mill are milled, shaken to ball mill, Vertical Mill, sledge mill, roller-crushing mill, wheel, air swept mill, cage type pulverizer, steel pawl pulverizer, turbine grinder, steam flow pulverizer, flour mill etc.Though these equipment structures are different, operation principle all is to utilize gravity, inertia force, frictional force that the thing grain is pulverized, and processing fine powder or superfine powder need dispose huge particle classifying equipment and cleaner.These milling equipment power consumption height account for the powder preparation and produce more than 2/3 of power consumption.Utilize centrifugal force to come grinding thing grain, this theory being is just is being researched and developed novel milling equipment as far back as the nineteen seventies people.Successively occurred column mill, annular grinder, moving axis formula annular grinder in succession, fallen some designs and equipments such as dynamic formula annular grinder, announced multiple relevant patent at Chinese patent.Column mill is liner plate and running roller structure, and contact-making surface is excessive between running roller and the liner plate, and the operation of milling is only established again together, the thing grain can not get milling fully in the mill body, the fineness that goes out mill is very inhomogeneous, and big particle reaches five millimeter, and this equipment directly grinding goes out fine powder and superfine powder product.Annular grinder, moving axis formula annular grinder, fall the dynamic formula annular grinder and be designed to liner plate and multilayer running roller structure.The thing grain can not fully enter between liner plate and the running roller, the groove mark in case liner plate is milled out, and the thing grain just more is difficult for entering between groove mark and the running roller, and dry grinding at a high speed just appears in running roller and liner plate, and the powder granularity that goes out mill is inhomogeneous, and liner plate and running roller also are worn very soon.The running roller of these equipment and axle, running roller and moving axis, running roller is sliding friction with falling cooperating between the axle.Under high-speed cruising, this cooperation can produce high temperature, and beam warp is not lived the work of condition like this, is damaged soon.
Summary of the invention:
Task of the present utility model is to provide a kind of liner plate and running roller that can solve grinding machine fragile, service life is short, and be difficult to realize the stacking type planetary annular grinder of problem of the fine grinding of powder, can also realize that simultaneously the convenient mill body of can directly opening of maintenance of equipment changes losser, the purpose of good energy-conserving effect.
Transmission device, feed hopper, mill body, discharge bucket and the frame be made up of motor, middle bearing bracket, universal joint and speed changer of the stacked planet annular grinder of the utility model constitutes for achieving the above object, feed hopper is positioned at the top of mill body, discharge bucket is positioned at the below of mill body, is provided with discharging opening in mill body bottom and links to each other with discharge bucket;
The mill body is made up of a left side half cylindrical shell that splits around and right half cylindrical shell, main shaft, equal charging tray, stone roller ring, sieve plate, suspension type muller assembly, lifting body, loam cake and base; Grind corresponding left half cylindrical shell of ring and right half cylindrical shell and be and split around formula structure and pad on the inwall of a left side half cylindrical shell and right half cylindrical shell, grind ring by the stent support of being close to left half cylindrical shell and right half cylinder inboard wall that is arranged on the below and fixing, the undermost stone roller ring directly step bottom a left side half cylindrical shell and right half cylindrical shell supports and is fixing, be evenly equipped with groove on the periphery of stone roller ring, at the stone roller ring of the superiors and the support middle mounted sieve corresponding with it; It is different with the operation of milling that muller is equipped with that each layer grinds ring, can be divided into thick broken layer from top to bottom, thin broken layer, meal layer, fine-powder bed.
Described suspension type muller assembly includes muller, arm beam, muller axle and bearing pin; The bottom of muller axle is provided with bearing block, muller is sleeved on the bearing block with pressing plate, the top of muller axle cooperates with the axis hole of arm beam one end, fixes with the notch that clamp blocks on the muller axle, and the axis hole of the arm beam other end cooperates with the equal charging tray of the corresponding configuration with it in the top of bearing pin and the axis hole of rotating disk;
All charging tray and rotating disk connect with main shaft with key, and the top of main shaft cooperates with the bearing at loam cake center, and the bottom of main shaft cooperates with the bearing at base center, and main shaft is suspended in the center of mill body, and the top of main shaft is connected on the basin tooth of speed changer; On the mill body, left half cylindrical shell and right half cylindrical shell Bolt Connection are one with Bolt Connection for loam cake and base;
Described lifting body is to constitute by two alignment pin of an end setting of the loam cake of mill body and the jacking bolt that matches and at the jacking axle of the other end setting of loam cake, the upper end of jacking axle is fixed on two nuts and covers, the jacking axle runs through the axis hole that is located at left half cylindrical shell and right half drum shaft ear respectively, two cover bearings are set with nut and tightening position at the lower shaft ear, jacking axle lower end is passed and is located at guideway on the frame, and is provided with the jacking nut in the bottom.
The course of work of the present utility model is as follows: motor starting, rotary power is passed through the middle bearing bracket axle, universal drive shaft, the basin tooth of speed changer is given in the corner tooth shaft transmission, and the basin cingulum moves main shaft, and main shaft drives equal charging tray and rotating disk, all charging tray and rotating disk upper pin drive the suspension type muller assembly of suspention, muller rolls along grinding ring, and around the rotation of muller axle, muller is done planetary motion around main shaft.The thing grain is added by feed hopper, charging aperture by mill body loam cake, enter in the mill body, through the uniform broadcasting of homocline disc spins, fall ground floor and grind in the Baltimore groove that encircles, be brought between muller and the stone roller ring through muller inertia rolling power, be subjected to rolling compaction power and pulverize, the thing grain hangs to and sieves on the backing plate, falls down less than the particle of sieve aperture on the rotating disk of one deck, and intransitable particle drives through muller and continues again to grind again.The thing grain of falling on the rotating disk broadcasts sowing through rotating disk rotation, falls in the Baltimore groove that the second layer grinds ring, is subjected to the drive of inertia rolling power to enter into muller and grinds between the ring, is subjected to rolling compaction power and pulverizes, and the thing grain hangs down on one deck rotating disk.The rolling compaction through multiple working procedure that the thing grain is so analogized is pulverized, and is from coarse to fine, and going out mill just becomes fine powder or superfine powder powder.
Muller rolls along grinding ring, and around the rotation of muller axle, muller is done planetary motion around main shaft.Muller is made circular motion and is produced centrifugal force, acts on to grind on the ring, grinds the corresponding reaction force that produces of ring.Grind thus and form between ring and the muller, and driving muller, to make the function of rolling movement little, can reach purpose of energy saving greater than muller deadweight tens even the rolling compaction power more than the hundred times.
The utility model also is provided with a cover lifting body, when needing maintenance in the mill body or changing consumable accessory, cylindrical shell is removed with the securing member that respectively is connected of loam cake, base, revolve the jacking bolt at two ends, top, make the gap that forms 5-10MM between cylindrical shell and loam cake, the base, two fan cylindrical shells just can easily rotate 240 degree around the jacking axle separately, can directly open the mill body and change losser, and maintenance of equipment is convenient.
The utility model is in series with frequency converter at the circuit that connects motor, can stepless adjustment motor speed, change the peripheral speed of muller in the mill body, and the rolling compaction power of muller also becomes thereupon and diminishes greatly.Just possess can be according to the hardness of going into to grind the thing grain for the utility model like this, the size of granularity, and the loss situation of milling material in the mill body, the fineness requirement of product is adjusted control, guarantees out that the mill product fineness reaches qualified requirement.
The utility model is to be superimposed together by the multilayer powder-grinding process in sum, utilizes muller to make the grinding machine of planetary motion processing powder.After adopting said structure, the utlity model has following characteristics:
1, the thing grain of pulverizing can be milled into fine powder or superfine powder powder;
2, reduce power consumption more than 70% than traditional grinding machine equipment;
3, the controlled grinding rate of making uses no or little particle classifying equipment;
4, can reduce the loss of milling material;
5, can improve the production environment that powder prepares industry, alleviate the pollution of noise and dust;
6, weight of equipment is light, volume is little, can reduce capital construction investment cost is installed;
7, starting torque is little, and starting current is steady; Continuously variable also can carry out Long-distance Control with computer networking.
8, repair apparatus, replacing consumable accessory are conveniently.
Description of drawings:
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the cutaway view of the utility model mill body;
Fig. 3 is the utility model suspension type muller assembly installation diagram;
Fig. 4 is the utility model muller operation schematic diagram;
Fig. 5 grinds the front view of ring for the utility model;
Fig. 6 grinds the cutaway view of ring for the utility model;
Fig. 7 opens schematic diagram for the utility model cylindrical shell;
Fig. 8 is the utility model electric control circuit figure;
Shown in the above figure: 1, motor; 2, middle bearing bracket; 3, universal joint; 4, decelerator; 5, feed hopper; 6, lifting body; 7, mill body; 8, discharge bucket; 9, frame; 10, left half cylindrical shell; 11, support; 12, alignment pin; 13, jacking bolt; 14, corner tooth shaft; 15, basin tooth fixed cover; 16, basin tooth; 17, bearing; 18, main shaft; 19, key; 20, loam cake; 21, equal charging tray; 22, suspension type muller assembly; 23, nut; 24, jacking axle; 25, grind ring; 29, sieve plate; 30, right half cylindrical shell; 31, bearing; 32, fairlead; 33, jacking bolt; 34, rotating disk; 35, base; 36, bearing; 37, bearing pin nut; 38, bearing pin; 39 and cap; 40, arm beam; 41, clamp; 42, muller axle; 43, pressing plate; 44, malthoid circle; 45, hole shape elastic circlip; 46, skeleton sealing ring; 47, seal receptacle; 48, bearing; 49, spacer ring; 50, bearing; 51, bearing block; 52, muller; 53, groove.
The specific embodiment:
Below in conjunction with accompanying drawing structure of the present utility model is described in detail.
The transmission device that stacked planet annular grinder as shown in Figure 1 is made up of motor (1), middle bearing bracket (2), universal joint (3) and speed changer (4), feed hopper (5), mill body (7), discharge bucket (8) and frame (9) constitute, feed hopper (5) is positioned at the top of mill body (7), discharge bucket (8) is positioned at the below of mill body (7), is provided with discharging opening in mill body bottom and links to each other with discharge bucket.
Grinding body (1) as shown in Figure 2 is made up of a left side half cylindrical shell (10) that splits around and right half cylindrical shell (30), main shaft (18), equal charging tray (20), stone roller ring (25), sieve plate (29), suspension type muller assembly (22) and lifting body (6), loam cake (20) and base (35); Grind corresponding left half cylindrical shell of ring (25) and right half cylindrical shell (30) for splitting around the formula structure, pad is on the inwall of a left side half cylindrical shell (10) and right half cylindrical shell (30), grind ring (25) by support (11) support of being close to left half cylindrical shell (10) and right half cylindrical shell (30) inwall that is arranged on the below and fixing, undermost stone roller ring (25) the directly step bottom a left side half cylindrical shell (10) and right half cylindrical shell (30) supports and is fixing, at the stone roller ring (25) of the superiors and support (11) the middle mounted sieve (29) corresponding with it; Suspension type muller assembly (22) includes muller (52), arm beam (40), muller axle (42) and bearing pin (38) as shown in Figure 3; The bottom of muller axle (42) is provided with bearing block (51), and muller (52) is sleeved on the bearing block (51) with pressing plate (43); Bearing block (51) connects malthoid circle (44), hole shape elastic circlip (45), skeleton sealing ring (46), seal receptacle (47), bearing (48), spacer ring (49) and bearing (50) from top to bottom successively.The top of muller axle (42) cooperates with the axis hole of arm beam (40) one ends, fixes with the notch that clamp (43) blocks on the muller axle, and the axis hole of arm beam (40) other end cooperates with the bottom of bearing pin (38); The top of bearing pin (38) that is arranged on the suspension type muller assembly (22) of the superiors cooperates the equal charging tray (21) of the corresponding configuration with it in the top of the bearing pin (38) of the suspension type muller assembly (22) of all the other lower floors, the cooperation of the axis hole of rotating disk (34) with equal axis holes of charging tray (21); The top at bearing pin (38) connects and cap (39), at the spindle nut of connecting pin bottom (37) of bearing pin (38); All charging tray (21) and rotating disk (34) connect with main shaft (18) with key (19), the top of main shaft (18) cooperates with the bearing (17) at loam cake (20) center, the bottom of main shaft (18) cooperates with the bearing (36) at base (35) center, main shaft (18) is suspended in the center of mill body (7), the basin tooth fixed cover (15) that the top of main shaft (18) is connected in speed changer (4) is fixed on the basin tooth (16), and basin tooth (16) cooperates with angle tooth on the corner tooth shaft (14); On mill body (7), left half cylindrical shell (10) and right half cylindrical shell (30) are one with Bolt Connection with Bolt Connection for loam cake (20) and base (35); Described lifting body (6) is two alignment pin (12) of being provided with of the end by the loam cake (20) of mill body (7) and the jacking bolt (13) that matches and jacking axle (24) formation that is provided with at the other end of loam cake (20), the upper end of jacking axle (24) is fixed on the loam cake (20) with two nuts (23), the jacking axle runs through the axis hole that is located at left half cylindrical shell (10) and right half cylindrical shell (30) axle ear respectively, two cover bearings (31) are set with nut and tightening position at the lower shaft ear, jacking axle (24) lower end is passed and is located at upward guideway (32) of frame (9), and is provided with jacking nut (33) in the bottom.
As shown in Figure 4, main shaft (18) drives equal charging tray (21) and rotating disk (34) clockwise, go up the muller (52) that is connected with arm beam (40) by equal charging tray with bearing pin (38) the drive suspension type suspension type muller assembly (22) on the rotating disk, the arm beam that the suspension type muller assembly (22) of each layer is provided with four mullers and is attached thereto, and bearing pin, muller is around muller axle (42) rotation counterclockwise, muller is rolled along grinding ring, the realization muller is done planetary motion along grinding clockwise around main shaft (18), the circular motion of muller produces centrifugal force, act on and grind on the ring, enter the material of mill body, by equal charging tray or rotating disk rotation uniform broadcasting, fall as Fig. 6, in the groove that has on the periphery of stone roller ring shown in Figure 7 (53), the both sides of grinding ring groove (53) are straight flange, and another side is the arc limit; Be brought into muller and grind between the ring through muller inertia rolling power, be subjected to rolling compaction power and pulverize.
As shown in Figure 7, when needing maintenance in the mill body or changing damaged part, a left side half cylindrical shell (10), right half cylindrical shell (30) are removed with the connecting bolt of loam cake (20), base (35), revolve jacking bolt (13), (33) at two ends, top simultaneously, make the gap that forms 5-10MM between left half cylindrical shell (10), right half cylindrical shell (30) and loam cake (20), the base (35), a left side half cylindrical shell (10), right half cylindrical shell (30) can be separately around jacking axle (34) rotation 240 degree, can directly open the mill body and change the damage element, maintenance of equipment is convenient.
As shown in Figure 8, be in series with frequency converter VF at the circuit that connects motor (2), can stepless adjustment motor speed, also can realize carrying out Long-distance Control with computer networking.
Claims (6)
1, a kind of stacked planet annular grinder, by motor (1), middle bearing bracket (2), the transmission device that universal joint (3) and speed changer (4) are formed, feed hopper (5), mill body (7), discharge bucket (8) and frame (9) constitute, feed hopper (5) is positioned at the top of mill body (7), discharge bucket (8) is positioned at the below of mill body (7), be provided with discharging opening in mill body bottom and link to each other with discharge bucket, it is characterized in that: mill body (1) is by a left side half cylindrical shell (10) that splits around and right half cylindrical shell (30), main shaft (18), equal charging tray (20), rotating disk (34), grind ring (25), sieve plate (29), suspension type muller assembly (22) and lifting body (6), loam cake (20) and base (35) are formed; Grind corresponding left half cylindrical shell (10) of ring (25) and right half cylindrical shell (30) for splitting around formula structure and pad on the inwall of a left side half cylindrical shell (10) and right half cylindrical shell (30), grind ring (25) by support (11) support of being close to left half cylindrical shell (10) and right half cylindrical shell (30) inwall that is arranged on the below and fixing, the step of direct left half cylindrical shell (10) of undermost stone roller ring (25) and right half cylindrical shell (30) bottom supports and is fixing, be evenly equipped with groove (53) on the periphery of stone roller ring (25), at the stone roller ring (25) of the superiors and support (11) the middle mounted sieve (29) corresponding with it; Described suspension type muller assembly (22) includes muller (52), arm beam (40), muller axle (42) and bearing pin (38); The bottom of muller axle (42) is provided with bearing block (51), muller (52) is sleeved on the bearing block (51) with pressing plate (43), the top of muller axle (42) cooperates with the axis hole of arm beam (40) one ends, fix with the notch that clamp (43) blocks on the muller axle, the axis hole of stern beam (40) other end cooperates with the bottom of bearing pin (38); The top of the bearing pin (38) of suspension type muller assembly (22) cooperates with the axis hole of equal charging tray (21), and the axis hole of the rotating disk (34) of the corresponding configuration with it in top of the bearing pin (38) of the suspension type muller assembly (22) of all the other lower floors cooperates; All charging tray (21) and rotating disk (34) connect with main shaft (18) with key (19), the top of main shaft (18) cooperates with the bearing (17) at loam cake (20) center, the bottom of main shaft (18) cooperates with the bearing (36) at base (35) center, main shaft (18) is suspended in the center of mill body (7), and the top of main shaft (18) is connected on the basin tooth (16) of speed changer (4); On mill body (7), left half cylindrical shell (10) and right half cylindrical shell (30) are one with Bolt Connection with Bolt Connection for loam cake (20) and base (35); Described lifting body (6) is two alignment pin (12) of being provided with of the end by the loam cake (20) of mill body (7) and the jacking bolt (13) that matches and jacking axle (24) formation that is provided with at the other end of loam cake (20), the upper end of jacking axle (24) is fixed on the loam cake (20) with two nuts (23), the jacking axle runs through the axis hole that is located at left half cylindrical shell (10) and right half cylindrical shell (30) axle ear respectively, two cover bearings (31) are set with nut and tightening position at the lower shaft ear, jacking axle (24) lower end is passed and is located at upward guideway (32) of frame (9), and is provided with jacking nut (33) in the bottom.
2, according to the described stacking type planetary annular grinder of claim 1, it is characterized in that: the number of plies of the suspension type muller assembly (22) of setting is at least two-layer.
3, according to the described stacking type planetary annular grinder of claim 1, it is characterized in that: the both sides of grinding ring groove (53) are straight flange, and another side is the arc limit.
4, according to the described stacking type planetary annular grinder of claim 1, it is characterized in that: go up the muller that is provided with the suspension type muller assembly (22) of one deck and be at least two.
5, according to the described stacking type planetary annular grinder of claim 1, it is characterized in that: the circuit that connects motor (2) is in series with frequency converter.
6, according to claim 1 or 2 or 3 or 4 or 5 described stacking type planetary annular grinders, its feature is in fourth: connect malthoid circle (44), hole shape elastic circlip (45), skeleton sealing ring (46), seal receptacle (47), bearing (48), spacer ring (49) and bearing (50) in the bearing block (51) from top to bottom successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069444 CN2748172Y (en) | 2004-12-10 | 2004-12-10 | Stack up type planet ring grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069444 CN2748172Y (en) | 2004-12-10 | 2004-12-10 | Stack up type planet ring grinding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2748172Y true CN2748172Y (en) | 2005-12-28 |
Family
ID=35719666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420069444 Expired - Fee Related CN2748172Y (en) | 2004-12-10 | 2004-12-10 | Stack up type planet ring grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2748172Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462087B (en) * | 2009-01-14 | 2012-02-22 | 蒋贡生 | Stacking type planetary vertical mill |
| CN102806120A (en) * | 2012-08-17 | 2012-12-05 | 湖南中宏重型机器有限公司 | Grinding force adjustable hammer wheel mechanism of annular grinding type vertical grinding machine |
| WO2013067895A1 (en) * | 2011-11-10 | 2013-05-16 | 桂林晟兴机械制造有限公司 | Direct-current, double-support and ultra-fine ring roller grinder |
| CN103480853A (en) * | 2013-10-08 | 2014-01-01 | 镇江宝纳电磁新材料有限公司 | Multi-stage swing disk type roller device used for grinding scale-like metal powder |
| CN108453122A (en) * | 2018-04-02 | 2018-08-28 | 广东省生态环境技术研究所 | Place heavy-metal contaminated soil abatement equipment and its administering method |
-
2004
- 2004-12-10 CN CN 200420069444 patent/CN2748172Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462087B (en) * | 2009-01-14 | 2012-02-22 | 蒋贡生 | Stacking type planetary vertical mill |
| WO2013067895A1 (en) * | 2011-11-10 | 2013-05-16 | 桂林晟兴机械制造有限公司 | Direct-current, double-support and ultra-fine ring roller grinder |
| CN102806120A (en) * | 2012-08-17 | 2012-12-05 | 湖南中宏重型机器有限公司 | Grinding force adjustable hammer wheel mechanism of annular grinding type vertical grinding machine |
| CN102806120B (en) * | 2012-08-17 | 2014-03-12 | 湖南中宏重型机器有限公司 | Grinding force adjustable hammer wheel mechanism of annular grinding type vertical grinding machine |
| CN103480853A (en) * | 2013-10-08 | 2014-01-01 | 镇江宝纳电磁新材料有限公司 | Multi-stage swing disk type roller device used for grinding scale-like metal powder |
| CN103480853B (en) * | 2013-10-08 | 2016-06-29 | 镇江宝纳电磁新材料有限公司 | A kind of multistage rotating disk type roll grinding device for rolling flaky metal powder |
| CN108453122A (en) * | 2018-04-02 | 2018-08-28 | 广东省生态环境技术研究所 | Place heavy-metal contaminated soil abatement equipment and its administering method |
| CN108453122B (en) * | 2018-04-02 | 2023-12-12 | 广东省生态环境技术研究所 | Site heavy metal contaminated soil treatment equipment and treatment method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051228 Termination date: 20100111 |