CN102923405B - Powder can and mixing plant - Google Patents
Powder can and mixing plant Download PDFInfo
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- CN102923405B CN102923405B CN201210410155.3A CN201210410155A CN102923405B CN 102923405 B CN102923405 B CN 102923405B CN 201210410155 A CN201210410155 A CN 201210410155A CN 102923405 B CN102923405 B CN 102923405B
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Abstract
The invention proposes a powder can and a mixing plant. The powder can comprises a cylindrical barrel body, wherein the barrel body comprises a belt component which is spirally crimped in the up-and-down direction; the belt component comprises an upper part and a lower part; the belt component is spirally crimped into a plurality of layers; the lower part of the upper layer and the upper part of the lower layer are mutually occluded to form an occlusion rib in two adjacent layers, and the whole occlusion rib is of a spiral structure. The powder can disclosed by the invention can adopt the spiral roll plate structure, can provide a vertical connecting device at the inner wall of the barrel body, also can be connected with an accessory of the powder can through a buckle fastened on the occlusion rib, and has the advantages of high manufacturing speed, good anti-rusting property, attractive appearance, unique structure and the like.
Description
Technical field
The present invention relates generally to storage arrangement field, particularly a kind of powder tank, and comprises the mixing plant of this powder tank.
Background technology
Powder tank is the vitals of mixing plant, for as powder class material as the storage container of cement, flyash etc.In prior art, powder tank is nearly all columned stack shell, mostly adopts welding structure and splicing structure.
For the welding powder tank of welding structure, making workman is all that hand is lifted pickaback at the scene, and preparation method is quite original, and it is large that it makes labour intensity, and field fabrication work is very heavy, has a strong impact on mixing plant and installs the speed and quality of paying.
In addition, for aforementioned welding powder tank, although adopt various forms of external coating process, but due to reasons such as current weather and acid rains, still often there is large area peeling paint and corrosion after welding powder tank stack shell appearance uses a period of time, have a strong impact on mixing plant product brand and construction enterprises' image.Especially the how moist sea wind in coastal area, southern area polyacid rain, its appearance corrosion is even more serious.
For the assembled powder tank of splicing structure, although powder tank stack shell surface paint dispatches from the factory, coating quality is guaranteed comparatively speaking, but powder tank stack shell piece is transported to in-site installation, painting layer inevitably suffers destruction in various degree, add climate reasons, its stack shell appearance still there will be corrosion phenomena.In addition, the piece transport trouble of assembled powder tank, occupy a large amount of entrucking spaces, cost of transportation significantly increases.
The powder tank of aforementioned two kinds of structures, its stack shell is all generally that thin plate makes, and most of powder tank stack shell needs once to eliminate rust mopping process every the 2-3 year.The rust cleaning mopping of the powder tank stack shell up to more than 10 meters, belongs to work high above the ground, there is potential safety hazard, and time and effort consuming, rust cleaning mopping operation is very inconvenient.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of powder tank, this powder tank reduces the labour intensity making workman, and can improve manufacturing speed.
Powder tank of the present invention, comprise cylindric stack shell, described stack shell is included in the strip-shaped members of above-below direction helix-coil, described strip-shaped members comprises upper and lower, described strip-shaped members helix-coil forms multilayer, in adjacent two layers, the bottom on upper strata and the top of lower floor are mutually engaged and form occlusion muscle, and described occlusion muscle entirety is helical structure.
Further, the top fold of described strip-shaped members forms the first bending edges, and the bottom fold of described strip-shaped members forms the second bending edges, and in adjacent two layers, second bending edges on upper strata and the first bending edges occlusion of lower floor form described occlusion muscle.
Further, the cross section of described strip-shaped members is
shape.
Further, the length of described first bending edges is A, and the length of described second bending edges is B, wherein │ A-B │/(A+B) < 10%.
Further, described occlusion muscle is oblique upwards to be arranged and is positioned at the outside of described stack shell, forms V-arrangement root with the outer wall of described stack shell.
Further, described strip-shaped members is steel band, and the one or both sides of described steel band are provided with corrosion resistant layer.
Further, also comprise the vertical jockey being arranged at described stack shell inwall, described vertical jockey comprises tension part, and the first end connection of described tension part is positioned at the first attaching parts of stack shell inwall upper end, the second end connects the second attaching parts being positioned at stack shell inwall lower end.
Further, described tension part is flexible member, forms soft connection device between described tension part and each attaching parts.
Further, the adjustment component that described tension part comprises steel wire rope and is connected with described steel wire rope, its length of described adjustment component is adjustable, and described steel wire rope and described adjustment component are connected between described first attaching parts and the second attaching parts.
Further, described adjustment component comprises:
Thread bush, described thread bush is provided with internal thread;
First screw rod, the first end of described first screw rod connects described steel wire rope, the second end is provided with external screw thread and is also arranged in described thread bush rotationally;
Second screw rod contrary with the first screw flight rotation direction, the first end of described second screw rod be provided with external screw thread and be arranged in described thread bush rotationally, the second end connects described second attaching parts.
Further, also comprise buckle, the first end of described buckle is clamped on described occlusion muscle, the second end connects feed pipe or cat ladder.
Further, described buckle comprises pressing plate and grab, and described pressing plate and described grab are arranged at the both sides of described occlusion muscle respectively, described grab is provided with and the described groove being engaged muscle and coordinating, described pressing plate and described grab are provided with securing member.
Further, described grab is provided with projection, described protruding conduct compresses fulcrum and contacts with described pressing plate.
Further, also comprise transition piece, described transition piece connects the second end of described buckle, and described feed pipe or cat ladder are arranged on described transition piece.
Further, also comprise U-shaped clip, described buckle tilts to be clamped on described occlusion muscle, and horizontal bending, the horizontal bending edges of described transition piece and described buckle is fastenedly connected, the open-loop of U-shaped clip and the vertical edge of described transition piece are fastenedly connected, and described feed pipe is set in described U-shaped clip.
Further, described buckle tilts to be clamped on described occlusion muscle, and horizontal bending, the horizontal bending edges of described transition piece and described buckle is fastenedly connected, and the vertical edge of described cat ladder and described transition piece is fastenedly connected.
Another aspect of the present invention, also provides a kind of mixing plant, and this mixing plant is provided with the powder tank of aforementioned any one.
Powder tank of the present invention can adopt helical coil plank frame, and can arrange vertical jockey at stack shell inwall, but also can connect feed pipe or cat ladder by the buckle be clamped on occlusion muscle.Compared with prior art, the present invention is by rotating the reel technique of bending, screw occlusion, continuous, the disposable spiral of powder tank stack shell can be realized roll, be particularly useful for the making of the minor diameter powder tank stack shell (being generally less than 5 meters) of mixing plant, not only can improve manufacturing speed, can also labor strength be reduced.
In addition, strip-shaped members can be bent into by the present invention has specific shape, solves the problem that tearing defect easily appears in the shaping middle occlusion muscle root of screw occlusion.
Present invention, avoiding the use of welding procedure, therefore can avoiding, by welding the damage caused stack shell surface, decreasing antirust work, antirust without the need to large area mopping, rustproof property promotes greatly, without the need to long-term touch-up paint, extend the service life of powder tank, greatly reduce maintenance cost.
The present invention also has the advantages such as aesthetic in appearance, structure is unique.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the powder tank of invention one embodiment;
Fig. 2 is the sectional view of the strip-shaped members of one embodiment of the invention;
Fig. 3 is the sectional view after strip-shaped members occlusion embodiment illustrated in fig. 2;
Fig. 4 is the layout schematic diagram of the vertical jockey of one embodiment of the invention;
Fig. 5 is the structural representation of vertical jockey embodiment illustrated in fig. 4;
Fig. 6 is the buckle of one embodiment of the invention and the structural representation of feed pipe;
Fig. 7 is the structural representation of grab embodiment illustrated in fig. 6;
Fig. 8 is the structural representation of transition piece embodiment illustrated in fig. 6 and U-shaped clip;
Fig. 9 is the buckle of one embodiment of the invention and the structural representation of cat ladder;
Figure 10 is the structural representation of transition piece embodiment illustrated in fig. 9.
Description of reference numerals
Stack shell-1 is engaged stirrup-1c annular collar tie beam-1d vertical jockey-2 first attaching parts-21 second attaching parts-22 steel wire rope-20 wire line hitch-2a adjustment component-3 first attaching parts-21 second attaching parts-22 thread bush-30 first screw rod-31 second screw rod-32 buckle-4 pressing plate-41 grab-42 securing member-43 groove-4a projection-4b transition piece-5 U-shaped clip-6 in muscle-10 first bending edges-11 second bending edges-12 feed pipe-1a cat ladder-1b annular
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Be the structural representation of the powder tank of one embodiment of the invention shown in Fig. 1, this powder tank at least comprises cylindric stack shell 1.In addition, this powder tank can comprise taper Cang Ding, the taper aggregate bin of stack shell 1 lower end, the interior stirrup 1c of annular, the part such as support stack shell 1 and the annular collar tie beam 1d of below taper aggregate bin, the carrier parts supporting annular collar tie beam 1d and top discharging switch controlling device, top barrier mechanism, dust arrester, safety valve etc. of stack shell 1 upper end, and feed pipe 1a and cat ladder 1b can be comprised, the concrete structure of each several part can with reference to prior art.
Cylindric stack shell 1 is included in the strip-shaped members of above-below direction helix-coil, this strip-shaped members comprises upper and lower and helix-coil forms multilayer, in adjacent two layers, the bottom on upper strata and the top of lower floor are mutually engaged and form occlusion muscle 10, and occlusion muscle 10 entirety is helical structure.Should be clear, indication above-below direction of the present invention is with powder tank orientation in normal operation for benchmark, and the direction at Cang Ding place is under to be direction that is upper, supporting bracket place be.
Strip-shaped members is the structure that length-width ratio is very large, and has certain thickness.Preferably, this strip-shaped members is steel band, and the one or both sides of this steel band are provided with corrosion resistant layer.More preferably, this strip-shaped members is the hot rolled strip of double side zinc coating, does not need large area mopping antirust, namely has excellent rustproof property.Strip-shaped members of the present invention can adopt thin-walled steel band, and as 2.5mm is thick, making thin-walled stack shell apply to mixing plant becomes possibility.
Strip-shaped members can form helix-coil structure by kinds of processes, and as being made by rotation bending, screw occlusion moulding process, previous process can adopt intelligent bending and molding equipment and rotating clutch equipment.Before rotation bending, this strip-shaped members can be | tee section, and after its upper and lower is bent into given shape, can so that the mutual occlusion on the bottom on upper strata and the top of lower floor.After being engaged, namely can form the occlusion muscle 10 of the helical structure shown in Fig. 1.Strip-shaped members is often revolved and is turned around, and namely forms one deck, and final multi-turn rotation is to reach predetermined design height.
Shaping for the ease of being engaged, the upper and lower of strip-shaped members can form various structures respectively.Preferably, carry out bending respectively to the upper and lower of strip-shaped members, strip-shaped members top fold forms the first bending edges 11, and strip-shaped members bottom fold forms the second bending edges 12, in adjacent two layers, second bending edges 12 on upper strata and the first bending edges 11 of lower floor are engaged and form occlusion muscle 10.More preferably, as shown in Figure 2, its cross section is the sectional view of the strip-shaped members of one embodiment of the invention
shape.After the bottom on upper strata and the top of lower floor are engaged mutually, form occlusion muscle 10 as shown in Figure 3, this occlusion muscle 10 is oblique upwards to be arranged and is positioned at the outside of stack shell 1, and form V-arrangement root with the outer wall of stack shell 1, this occlusion muscle 10 can improve the circumferential rigidity of stack shell 1.
In order to improve the workmanship of engagement region, preferably aforementioned
first bending edges 11 of shape strip-shaped members is close with the size of the second bending edges 12, and the length namely defining the first bending edges 11 is A, and the length of the second bending edges 12 is B, then │ A-B │/(A+B) < 10%.
Strip-shaped members is bent into by previous embodiment of the present invention has specific shape, and the problem of tearing defect easily appears in the V-arrangement root solving the shaping middle occlusion muscle 10 of screw occlusion; By rotating the reel technique of bending, screw occlusion, continuous, the disposable spiral of powder tank stack shell 1 can be realized roll, the minor diameter powder tank stack shell 1(being particularly useful for mixing plant is generally less than 5 meters) making, not only can improve manufacturing speed, can also labor strength be reduced.Therefore, the present invention can large-area applications make in stirring station powder tank stack shell.
Vertically bear the ability of air pressure to strengthen stack shell 1, the present invention is also provided with vertical jockey 2 at stack shell 1 inwall.Fig. 4 is the layout schematic diagram of the vertical jockey 2 of one embodiment of the invention, and this vertical jockey 2 entirety radially distributes, and between the top and bottom being connected to stack shell 1 inwall, and bears cylinder pressure, increases the tensile strength of stack shell 1.Fig. 5 is the structural representation of vertical jockey 2 embodiment illustrated in fig. 4, this vertical jockey 2 comprises tension part, and the first end of tension part connects the first attaching parts 21, second end being positioned at stack shell 1 inwall upper end and connects the second attaching parts 22 being positioned at stack shell 1 inwall lower end.
As shown in Figure 4 and Figure 5, first attaching parts 21 of the present invention for be arranged at powder tank annular in the first pedestal on stirrup 1c, first pedestal is hook structure or platy structure with holes, and it can be connected by the mode hanging, place with the first end of tension part; Second attaching parts 22 of the present invention are for being arranged at the second pedestal on the annular collar tie beam 1d of powder tank, and the second pedestal is hook structure or platy structure with holes, and it can be connected by the mode hanging, place with the second end of tension part 1.
This tension part can be independently parts, and also can be the combination of several parts, the present invention be not limited to this.This tension part can be cord-like component or rod-like members.Further, preferred tension part is flexible member, forms soft connection device between tension part and each attaching parts.Aforementioned flexible member refers to the parts that can adjust flexibility at length direction easily, as steel wire rope, tightrope, loop chain etc.More preferably, tension part of the present invention is steel wire rope 20.For the ease of the installation of steel wire rope 20, the present invention can form ring-type joint by wire line hitch 2a at the two ends of steel wire rope 20.
In addition, in order to adjust tightness and the pulling force size of steel wire rope 20, tension part of the present invention can also comprise the adjustment component 3 be connected with steel wire rope 20, the its length of this adjustment component 3 is adjustable, and then the distance that can adjust between tension part first end and the second end, steel wire rope 20 and adjustment component 3 are connected between the first attaching parts 21 and the second attaching parts 22.
Aforementioned adjustment component 3 can be multiple possible structure as (positive and negative) threaded connection element or the parts with multiple locating hole, can also be the adjustable parts of its length such as cylinder or oil cylinder, the present invention be not limited to this.Preferably, adjustment component 3 comprises thread bush 30, first screw rod 31 shown in Fig. 5 and second screw rod 32 contrary with the first screw rod 31 thread rotary orientation.Wherein, thread bush 30 is provided with internal thread; First end connecting steel wire ropes 20, second end of the first screw rod 31 is provided with external screw thread and is arranged in thread bush 30 rotationally; The first end of the second screw rod 32 be provided with external screw thread and be arranged in thread bush 30 rotationally, the second end connects the second attaching parts 22.Aforementioned threads rotation direction is contrary, refer to the thread rotary orientation of the second screw rod 32 and matching thread cover 30, contrary with the thread rotary orientation that the first screw rod 31 and matching thread overlap 30, the diverse location in thread bush 30 can be located at by rotation first screw rod 31 and the second screw rod 32, and then regulate its length of adjustment component 3.
In addition, the present invention can also arrange locking nut, with by the first screw rod 31 and thread bush 30 and the locking of the position between the second screw rod 32 and thread bush 30.In addition, the first end of this first screw rod 31 is preferably O type structure, and this O type structure can wear steel wire rope 20, and can form ring joint by wire line hitch 2a, second end of this second screw rod 32 is preferably C type structure, and this C type structure can hang on the second pedestal.
For the ease of the connection between feed pipe 1a and stack shell 1, the present invention is also provided with buckle 4 as shown in Figure 6, and the first end of buckle 4 is clamped on occlusion muscle 10, the second end connects feed pipe 1a.This buckle 4 can be multiple possible clamping part, preferably includes pressing plate 41 and the grab 42 of the both sides being arranged at occlusion muscle 10 respectively.As shown in Figure 7, grab 42 is provided with and the groove 4a being engaged muscle 10 and coordinating, its be engaged muscle 10 cross sectional shape and match, thus realize the location of grab 42; In addition, this grab 42 can also arrange protruding 4b, protruding 4b contacts with pressing plate 41 as compression fulcrum.Former trenches 4a can be arranged at grab 42 tail end, protruding 4b can be arranged at grab 42 front end.Pressing plate 41 and grab 42 are provided with securing member 43, and this securing member 43 is preferably bolt, so that installation and removal, and can avoid by welding the damage caused stack shell 1 surface.
Previous mentioned snap 4 can directly be connected with feed pipe 1a, also can indirectly be connected with feed pipe 1a.Preferably, between buckle 4 and feed pipe 1a, be also provided with transition piece 5, transition piece 5 connects the second end of buckle 4, and feed pipe 1a is arranged on transition piece 5.
In order to optimize the space layout between buckle 4 and feed pipe 1a, preferred buckle of the present invention 4 tilts to be clamped on occlusion muscle 10, and horizontal bending, transition piece 5 is fastenedly connected with the horizontal bending edges of buckle 4, aforementioned platens 41 both can be carried out horizontal bending by the present invention, also aforementioned grab 42 can be carried out horizontal bending.As shown in Figure 8, the open-loop of U-shaped clip 6 and the vertical edge of transition piece 5 are fastenedly connected, and feed pipe 1a is set in U-shaped clip 6.Transition piece 5 both can comprise vertical edge, also comprised horizontal sides, and it can be made from multiple components, and also can be integrally formed.In addition, the connection between former components all can be with bolts, without the need to welding.
The buckle 4 of one embodiment of the invention and the structural representation of cat ladder 1b shown in Fig. 9, similar to the structure of feed pipe 1a to previous mentioned snap 4, the present invention by the installation that is engaged muscle 10 and namely can carries out the powder tank annexes such as cat ladder 1b be connected.This buckle 4 also can comprise the structure such as pressing plate 41 and grab 42, and the structure of each parts can with reference to above.
Unlike, for cat ladder 1b, its transition piece 5 used as shown in Figure 10, buckle 4 tilts to be clamped on occlusion muscle 10, and horizontal bending, transition piece 5 is fastenedly connected with the horizontal bending edges of buckle 4, and the vertical edge of cat ladder 1b and transition piece 5 is fastenedly connected, not the aforementioned U-shaped clip 6 for being set with feed pipe 1a.Similarly, this transition piece 5 both can comprise vertical edge, also comprised horizontal sides, and it can be made from multiple components, and also can be integrally formed.In addition, the connection between former components all can be with bolts, without the need to welding.
Except aforementioned powder tank, the present invention also provides a kind of mixing plant being provided with aforementioned powder tank.This mixing plant can be the equipment such as concrete mixing plant or wet mixing mortar mixing plant.Other structure of this mixing plant with reference to prior art, can not repeat them here herein.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a powder tank, comprise cylindric stack shell (1), it is characterized in that, described stack shell (1) is included in the strip-shaped members of above-below direction helix-coil, described strip-shaped members comprises upper and lower, and described strip-shaped members helix-coil forms multilayer, in adjacent two layers, the bottom on upper strata and the top of lower floor are mutually engaged and form occlusion muscle (10), and described occlusion muscle (10) entirety is helical structure;
Described powder tank also comprises the vertical jockey (2) being arranged at described stack shell (1) inwall, described vertical jockey (2) comprises tension part, the first end of described tension part connects the first attaching parts (21), the second end that are positioned at stack shell (1) inwall upper end and connects the second attaching parts (22) being positioned at stack shell (1) inwall lower end, described tension part is flexible member, forms soft connection device between described tension part and each attaching parts;
Described powder tank also comprises buckle (4), the first end of described buckle (4) is clamped on described occlusion muscle (10), second end connects feed pipe (1a) or cat ladder (1b), described buckle (4) comprises pressing plate (41) and grab (42), described pressing plate (41) and described grab (42) are arranged at the both sides of described occlusion muscle (10) respectively, described grab (42) is provided with and the described groove (4a) being engaged muscle (10) and coordinating, described pressing plate (41) and described grab (42) are provided with securing member (43).
2. powder tank according to claim 1, it is characterized in that, the top fold of described strip-shaped members forms the first bending edges (11), the bottom fold of described strip-shaped members forms the second bending edges (12), in adjacent two layers, second bending edges (12) on upper strata and the first bending edges (11) occlusion of lower floor form described occlusion muscle (10).
3. powder tank according to claim 2, is characterized in that, the cross section of described strip-shaped members is
shape.
4. powder tank according to claim 3, is characterized in that, the length of described first bending edges (11) is A, and the length of described second bending edges (12) is B, wherein │ A-B │/(A+B) < 10%.
5. powder tank according to claim 3, is characterized in that, described occlusion muscle (10) is oblique upwards to be arranged and is positioned at the outside of described stack shell (1), forms V-arrangement root with the outer wall of described stack shell (1).
6. powder tank according to claim 1, is characterized in that, described strip-shaped members is steel band, and the one or both sides of described steel band are provided with corrosion resistant layer.
7. powder tank according to claim 6, it is characterized in that, the adjustment component (3) that described tension part comprises steel wire rope (20) and is connected with described steel wire rope (20), the its length of described adjustment component (3) is adjustable, and described steel wire rope (20) and described adjustment component (3) are connected between described first attaching parts (21) and the second attaching parts (22).
8. powder tank according to claim 7, is characterized in that, described adjustment component (3) comprising:
Thread bush (30), (30) are provided with internal thread to described thread bush;
First screw rod (31), the first end of described first screw rod (31) connects described steel wire rope (20), the second end is provided with external screw thread and is also arranged in described thread bush (30) rotationally;
Second screw rod (32) contrary with the first screw rod (31) thread rotary orientation, the first end of described second screw rod (32) be provided with external screw thread and be arranged in described thread bush (30) rotationally, the second end connects described second attaching parts (22).
9. powder tank according to claim 1, is characterized in that, described grab (42) is provided with projection (4b), and described projection (4b) contacts with described pressing plate (41) as compressing fulcrum.
10. powder tank according to claim 1, it is characterized in that, also comprise transition piece (5), described transition piece (5) connects the second end of described buckle (4), and described feed pipe (1a) or cat ladder (1b) are arranged on described transition piece (5).
11. powder tanks according to claim 10, it is characterized in that, also comprise U-shaped clip (6), described buckle (4) tilts to be clamped on described occlusion muscle (10), and horizontal bending, described transition piece (5) is fastenedly connected with the horizontal bending edges of described buckle (4), the open-loop of U-shaped clip (6) and the vertical edge of described transition piece (5) are fastenedly connected, and described feed pipe (1a) is set in described U-shaped clip (6).
12. powder tanks according to claim 10, it is characterized in that, described buckle (4) tilts to be clamped on described occlusion muscle (10), and horizontal bending, described transition piece (5) is fastenedly connected with the horizontal bending edges of described buckle (4), and described cat ladder (1b) is fastenedly connected with the vertical edge of described transition piece (5).
13. 1 kinds of mixing plants, is characterized in that, are provided with the powder tank described in any one of claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410155.3A CN102923405B (en) | 2012-10-24 | 2012-10-24 | Powder can and mixing plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410155.3A CN102923405B (en) | 2012-10-24 | 2012-10-24 | Powder can and mixing plant |
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| CN102923405A CN102923405A (en) | 2013-02-13 |
| CN102923405B true CN102923405B (en) | 2015-07-08 |
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| JP6748638B2 (en) | 2014-09-24 | 2020-09-02 | オラクル・インターナショナル・コーポレイション | System and method for supporting patching in a multi-tenant application server environment |
| CN111670823B (en) * | 2020-07-20 | 2022-05-17 | 杨云 | A security fence structure for livestock-raising |
| CN113028268B (en) * | 2021-03-30 | 2022-07-08 | 中冶南方工程技术有限公司 | Gas tank, gas tank side plate and manufacturing method thereof |
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