CN103449197B - Catalyst charge device - Google Patents
Catalyst charge device Download PDFInfo
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- CN103449197B CN103449197B CN201210177548.4A CN201210177548A CN103449197B CN 103449197 B CN103449197 B CN 103449197B CN 201210177548 A CN201210177548 A CN 201210177548A CN 103449197 B CN103449197 B CN 103449197B
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- feed bin
- surge bunker
- conveying pipeline
- pedestal
- nut
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Abstract
Present invention is disclosed a kind of catalyst charge device, comprise feed bin, surge bunker, charging switch valve, feed bin pedestal, conveying pipeline and distributing device.Feed bin is positioned at the top of surge bunker, is bolted between the two, and a cushion block is respectively installed in the both sides of bolt.Charging switch valve is arranged between feed bin and surge bunker.Conveying pipeline is the ripply plastic hose of band, and the upper end of conveying pipeline is connected with surge bunker.Conveying pipeline is through the centre hole of feed bin base bottom, and the lower end of conveying pipeline is enclosed within outside the cloth tube of distributing device.The bottom of surge bunker is placed in the framework of feed bin pedestal.The present invention has and can effectively prevent physical damage in catalyst charge process, catalyst cloth even, and feed rate is convenient to the features such as control.
Description
Technical field
The present invention relates to the prevention technique of material blockage in phenol manufacturing process middle slot, more particularly, relate to a kind of catalyst charge device.
Background technology
Benzene hydrogenating catalyst is for accelerating hydrogenation chemical reaction, and benzene hydrogenating catalyst charging refers to, before hydrogenation plant comes into operation, throws in benzene hydrogenating catalyst to hydrogenation reactor.At present, the method of domestic benzene hydrogenating catalyst charging is, after dismounting bolt with flange, take off hydrogenation reactor top end cover, the catalyst of every bag about 1000 kilograms is toppled over to the catalyst support grid of bottom by the reactor head apart from about 20 meters, ground, after being fed to some, a liquid distributor tower tray and a catalyst support grid are installed, then charging in reactor is continued, and second liquid distributor tower tray and catalyst support grid are installed, and so forth, until tip position catalyst being added to reactor terminates charging.The method defect has two.One, catalyst cloth in reactor is uneven, space is large between catalyst.Its two, the catalyst of globular solids particle after falling from high altitude, easily mechanical damage and broken under gravity.Above-mentioned two defects will affect the good contact of reactant and catalyst and the service life of catalyst, and then affect efficiency and the output of hydrogenation reaction.
Summary of the invention
Object of the present invention aims to provide a kind of catalyst charge device, solves the various deficiencies existed in prior art.
According to the present invention, provide a kind of catalyst charge device, comprise feed bin, surge bunker, charging switch valve, feed bin pedestal, conveying pipeline and distributing device.Feed bin is positioned at the top of surge bunker, is bolted between the two, and a cushion block is respectively installed in the both sides of bolt.Charging switch valve is arranged between feed bin and surge bunker.Conveying pipeline is the ripply plastic hose of band, and the upper end of conveying pipeline is connected with surge bunker.Conveying pipeline is through the centre hole of feed bin base bottom, and the lower end of conveying pipeline is enclosed within outside the cloth tube of distributing device.The bottom of surge bunker is placed in the framework of feed bin pedestal.
According to one embodiment of the invention, feed bin comprises top feed bin, bottom feed bin, neck, feed bin protect frame and joint hinge.The cross-sectional plane of top feed bin, neck is square, and the vertical section of bottom feed bin is trapezoidal.Feed bin protects frame while weld with neck, and another side has circular hole.
According to one embodiment of the invention, surge bunker comprises hopper, short tube, flange plate and surge bunker and protects frame.The below of hopper is provided with short tube, and the below of short tube arranges flange plate, and surge bunker protects the opening part that frame is arranged at hopper.
According to one embodiment of the invention, charging switch valve comprises flashboard, pull bar and handle.Flashboard right end portion is a rectangle, and left end portion is one trapezoidal.Pull bar is steel pipe, and handle is a round steel.
According to one embodiment of the invention, feed bin pedestal comprises base plate, pedestal, column and bracket.Base plate is square, and surrounding has circular hole, is connected with end cover connecting flange, and center has a circular hole, through conveying pipeline and distributing device.Pedestal comprises four channel-section steels, and four channel-section steel composition groined types, the channel-section steel of pedestal is connected with base plate, and another side is connected with column.Column is made up of four angle steel, and lower end is connected with pedestal, and upper end is connected with bracket.Bracket is made up of four angle steel, and four angle steel compositions are three-back-shaped, and carrier direction square edge is down connected with the upper end of column, and four square edges of carrier direction level form pallet.
According to one embodiment of the invention, distributing device is made up of cloth cover, cloth tube, locating plate, nest, adjusting lever, bottom adjusting nut, bottom jam nut, top adjusting nut, top jam nut, radius stay.Cloth cover is made up of steel plate, and its shape is circular platform type, and the bottom of cloth cover has eight elongated holes equably.Cloth tube is made up of steel pipe, and upper end car has one section of profile of tooth, to improve and conveying pipeline Joint strenght.Locating plate is made up of three band steels, and three band steels, 120 degree of angles each other, the lower end of locating plate is connected with the electric welding of cloth tube lower end inner wall, and the upper end of locating plate is connected with nest electric welding.Nest is made up of unthreaded hole nut, and the inner ring of nest is through adjusting lever.Adjusting lever is made up of a round steel, and each car in two ends up and down of adjusting lever has one section of outside thread, is respectively used to install bottom adjusting nut, bottom jam nut, top adjusting nut and top jam nut.Bottom adjusting nut, top adjusting nut all adjust the distance between cloth cover and cloth tube.Bottom jam nut and top jam nut ensure that after adjusting nut mixes up spacing adjusting nut immobilizes.Radius stay is made up of two band steels, and two radius stays are welded as a whole with cloth tube and top adjusting nut respectively.
Have employed technical scheme of the present invention, the present invention compared with prior art tool has the following advantages:
1. owing to have employed small diameter and being with ripply conveying pipeline, add the resistance in catalyst dropping process, make catalyst E falling speed comparatively slow, reduce falling impacts power significantly, effectively prevent physical damage in catalyst charge process.
2. owing to have employed hollow out cloth cover and aiding in artificial evenly move operation, ensure that catalyst is uniformly distributed, reduced the gap between catalyst, added packed catalyst quantity, ensure the efficiency of benzene hydrogenation, and then ensure the quality of benzene hydrogenation.
3. owing to have employed the facilities such as charging switch valve, adjusting lever, setting nut, control feed rate easily under making the different occasion of height that is different at catalyst diameter, feed entrance point, thus realize improving feeding work efficiency under the prerequisite of charging that ensures safety.
To sum up, the present invention has and can effectively prevent physical damage in catalyst charge process, catalyst cloth even, and feed rate is convenient to the features such as control.
Accompanying drawing explanation
In the present invention, identical Reference numeral represents identical feature all the time, wherein:
Fig. 1 is benzene hydrogenating catalyst feed arrangement constructional drawing of the present invention;
Fig. 2 a is benzene hydrogenating catalyst feed arrangement feed bin front elevation of the present invention;
Fig. 2 b is benzene hydrogenating catalyst feed arrangement feed bin birds-eye view of the present invention;
Fig. 3 a is benzene hydrogenating catalyst feed arrangement surge bunker front elevation of the present invention;
Fig. 3 b is benzene hydrogenating catalyst feed arrangement surge bunker birds-eye view of the present invention
Fig. 4 a is benzene hydrogenating catalyst feed arrangement charging switch valve front elevation of the present invention;
Fig. 4 b is benzene hydrogenating catalyst feed arrangement charging switch valve lateral plan of the present invention;
Fig. 4 c is benzene hydrogenating catalyst feed arrangement charging switch valve birds-eye view of the present invention;
Fig. 5 a is benzene hydrogenating catalyst feed arrangement feed bin pedestal front elevation of the present invention;
Fig. 5 b is benzene hydrogenating catalyst feed arrangement feed bin pedestal birds-eye view of the present invention
Fig. 6 is benzene hydrogenating catalyst feed arrangement distributing device constructional drawing of the present invention;
Fig. 7 is benzene hydrogenating catalyst feed arrangement fundamental diagram of the present invention.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below in conjunction with drawings and Examples.
Charging body of the present invention is hydrogenation A reactor, and tank body is high is 17.6 meters, and diameter is 0.9 meter, and in tank, major part is beds, liquid distributor tower tray and several catalyst support grids.Before using this device, by pulling down the bolt on top end cover flange D, taking off the end cap of reactor, by hoisting crane, this device being hung tank deck, be placed on top end cover flange D.Below in conjunction with accompanying drawing, apparatus of the present invention are elaborated.
As Fig. 1, benzene hydrogenating catalyst feed arrangement constructional drawing of the present invention, device is made up of feed bin 1, surge bunker 2, charging switch valve 3, feed bin pedestal 4, conveying pipeline 5, distributing device 6.
Feed bin 1 is positioned at the top of surge bunker 2, connected by the bolt 7 of seven M10*30 between the two, the thick cushion block 8 of a 8mm is respectively installed in the both sides of bolt 7, the effect of cushion block 8 is to provide the gap between feed bin 1 and surge bunker 2, to ensure that charging switch valve 3 moves back and forth between feed bin 1 and surge bunker 2.Conveying pipeline 5 for diameter be 89mm, length is the plastic hose of 25 meters, the upper end of conveying pipeline 5 is enclosed within the steel pipe of a Φ 89, be connected by electric welding between this steel pipe and the butt flange 9 of DN80, be connected by the bolt of four M6*10 between butt flange 9 with surge bunker 2.Conveying pipeline 5 is through the centre hole bottom feed bin pedestal 4, and the lower end of conveying pipeline 5 is enclosed within outside the cloth tube of distributing device 6.The bottom of surge bunker 2 is placed in the upper frame of feed bin pedestal 4.
As Fig. 2 a and Fig. 2 b, benzene hydrogenating catalyst feed arrangement feed bin front elevation of the present invention, birds-eye view, a kind of benzene hydrogenating catalyst feed arrangement feed bin 1 by top feed bin 101, bottom feed bin 102, neck 103, feed bin protects frame 104, joint hinge 105 forms, top feed bin 101, bottom feed bin 102, neck 103, joint hinge 105 all adopt the thick steel plate of 5mm to make, and are connected between four by electric welding.The cross-sectional plane of top feed bin 101, neck 103 is square, and the length of side of its middle and upper part feed bin 101 is 1200mm, and the length of side of neck 103 is 350mm, and the vertical section of bottom feed bin 102 is trapezoidal, and the upper length of side is 1200mm, and the lower length of side is 350mm.Feed bin protects frame 104 and is made up of four L50*5 angle steel, and feed bin protects welding with neck 103 of frame 104 angle steel, and it is 12mm circular hole that the another side that feed bin protects frame 104 angle steel has diameter, for hold-down bolt 7.
As Fig. 3 a and Fig. 3 b, benzene hydrogenating catalyst feed arrangement surge bunker front elevation of the present invention, birds-eye view, a kind of benzene hydrogenating catalyst feed arrangement surge bunker 2 is protected frame 204 formed by hopper 201, short tube 202, flange plate 203, surge bunker.The material of each parts of surge bunker 2, shape, connection mode are similar to feed bin 1, repeat no more herein, the object arranging surge bunker 2 is the size by reducing feed bin further, reduces feed rate in the unit time, slows down feed rate, reduce the impulsive force in catalyst dropping process.
As Fig. 4 a, Fig. 4 b, Fig. 4 c, benzene hydrogenating catalyst feed arrangement charging switch valve three-view diagram of the present invention, a kind of benzene hydrogenating catalyst feed arrangement charging switch valve 3 is made up of flashboard 301, pull bar 302, handle 303, is connected between three by electric welding.The shape of flashboard 301 is, right end portion is the rectangle of a long 400mm, wide 350mm, left end portion be a following 350mm top 100mm, high 150mm trapezoidal, adopt the thick steel plate of 5mm to make.Pull bar 302 is made up of the steel pipe of a Φ 16, and length is 400mm.The round steel that handle 303 is 6 by a diameter is made, and length is 20mm.The object arranging charging switch valve 3 controls when being convenient to charging, namely, after certain layer of catalyst charge terminates, charging switch valve 3 is moved from left to right, close feed bin, to install pot liquid distributing box tower tray or catalyst support grid, and then charging switch valve 3 is moved from right to left, open feed bin, continue charging.
As Fig. 5 a and Fig. 5 b, benzene hydrogenating catalyst feed arrangement feed bin pedestal front elevation of the present invention, birds-eye view, feed bin pedestal 4 is made up of base plate 401, pedestal 402, column 403, bracket 404.Base plate 401 is made up of 10mm plate iron, and its shape is square, and the length of side is 960mm, the surrounding of base plate 401 has 4 Φ 60 circular holes 405, be connected with end cover connecting flange D for apparatus of the present invention, mounting center position has Φ 100 circular hole 406, for passing conveying pipeline 5 and distributing device 6.Pedestal 402 is made up of four 8# channel-section steels, and four 8# channel-section steel composition groined types, the channel-section steel of pedestal 402 is connected with base plate 401 electric welding, and another side is connected with column 403 electric welding.Column 403 length is 560mm, is made up of four L50*5 angle steel, and the lower end of column 403 is connected with pedestal 402 electric welding, and the upper end of column 403 is connected with bracket 404 electric welding.Bracket 404 is made up of four L50*5 angle steel, and four angle steel compositions are three-back-shaped, and bracket 404 direction square edge is down connected with the upper end electric welding of column 403.Four square edges of bracket 404 direction level form pallet.
As Fig. 6, benzene hydrogenating catalyst feed arrangement distributing device constructional drawing of the present invention, distributing device 6 is made up of cloth cover 601, cloth tube 602, locating plate 603, nest 604, adjusting lever 605, bottom adjusting nut 606, bottom jam nut 607, top adjusting nut 608, top jam nut 609, radius stay 610.Cloth cover 601 is made up of the steel plate of 2mm, its shape is garden bench-type, upper end diameter is 10mm, lower end diameter is 120mm, be highly 100mm, the bottom of cloth cover 601 has eight elongated holes that width is 16mm equably, and the object arranging cloth cover 601 utilizes the hollow out shape of cloth cover 601 bottom that catalyst is evenly distributed state inside and outside cloth cover 601.Cloth tube 602 is made up of Φ 89 steel pipe, and length is 250mm, and the upper end car of cloth tube 602 has one section of profile of tooth, to improve and conveying pipeline 5 Joint strenght.Locating plate 603 is made up of three band steels that 5mm is thick, width is 10mm, three band steels, 1200 angles each other, the lower end of locating plate 603 is connected with the electric welding of cloth tube 602 lower end inner wall, the upper end of locating plate 603 is connected with nest 604 electric welding, nest 604 is made up of M10 unthreaded hole nut, and so-called " unthreaded hole " refers to that negative thread is put down by car.The inner ring of nest 604 is that the design of locating plate 603 and nest 604 is to ensure that adjusting lever 605 is in the center of cloth tube 602 for passing adjusting lever 605.Adjusting lever 605 is made up of Φ 10 round steel, length is 350mm, the each car in two ends up and down of adjusting lever 605 has length to be 80mm outside thread, is respectively used to install bottom adjusting nut 606, bottom jam nut 607, top adjusting nut 608 and top jam nut 609.Bottom adjusting nut 606, bottom jam nut 607, top adjusting nut 608 and top jam nut 609 all adopt M10 nut, its middle and lower part adjusting nut 606, top adjusting nut 608 all for adjusting the distance between cloth cover 601 and cloth tube 602, by the cloth speed of the distance controlling catalyst between adjustment cloth cover 601 and cloth tube 602.Different flow rate requirement corresponding during to meet the catalyst of different-diameter and different floor catalyst charge.Bottom jam nut 607 and top jam nut 609 are for ensureing that after adjusting nut mixes up spacing adjusting nut immobilizes.Radius stay 610 is made up of two band steels that 5mm is thick, width is 10mm, and two radius stays 610 are welded as a whole with cloth tube 602 and top adjusting nut 608 respectively.Radius stay 610 and top adjusting nut 608 have ensured the center of the upper end of adjusting lever 605 at cloth tube 602.
As Fig. 7, benzene hydrogenating catalyst feed arrangement fundamental diagram of the present invention, before adopting apparatus of the present invention, first pulls down the end cap of reactor.Remaining steps is:
With hoisting crane, feed bin pedestal 4 is hung reactor tank body A top, and be placed on top end cover flange D.With four M60 bolts, nut, base plate 401 is connected as one with top end cover flange D.
With seven M10*30 bolts, nut, feed bin 1, surge bunker 2 are connected as one.
With hoisting crane, feed bin 1, surge bunker 2 are winched on the bracket 404 of feed bin pedestal 4.
After the steel pipe of the upper end of conveying pipeline 5 and Φ 89 is tightened, after butt flange 9 and surge bunker 2 being connected as one with four M6*10 bolts, conveying pipeline 5 and distributing device 6 are passed the center hole 406 of base plate 401, slowly put into the bottom of reactor tank body A, by adjustment bottom adjusting nut 606 adjust 601 cloth cover 602 cloth tubes and between spacing.
Between feed bin 1, surge bunker 2, insert charging switch valve 3, and close flashboard 301.
With hoisting crane, catalyst E is poured into feed bin 1.
Open bottom reactor manhole B, belt length spindle clamp tool (other facilities, not shown) is put in reactor manhole B, clamps cloth tube 602, and be positioned at somewhere bottom reactor tank body A.
Charging switch valve 3 blowing is opened at the operating personal at reactor tank body A top by interphone notice.In blowing process, at the less diameter of conveying pipeline 5 and under the effect of bellows, catalyst E will slowly fall.In fill process, operating personal is orderly moving cloth pipe 602 constantly, and by cloth cover 601, catalyst E is uniformly distributed in reactor tank body A.
After reactor tank body A bottom feed terminates, the operating personal operating personal at interphone notice reactor tank body A top closes charging switch valve 3, stops blowing.
Respectively liquid distributor tower tray and catalyst support grid are installed.
After operating personal upwards shifts a floor C, distributing device 6 is risen to a upper floor, and open charging switch valve 3 blowing, and so forth, until charging is complete with the operating personal at interphone notice reactor tank body A top.
Those of ordinary skill in the art will be appreciated that, above specification sheets is only one or more embodiments in the numerous embodiment of the present invention, and not uses limitation of the invention.Any equalization for the above embodiment changes, modification and the equivalent technical scheme such as to substitute, as long as spirit according to the invention, all will drop in scope that claims of the present invention protect.
Claims (6)
1. a catalyst charge device, is characterized in that, comprising:
Feed bin, surge bunker, charging switch valve, feed bin pedestal, conveying pipeline and distributing device;
Described feed bin is positioned at the top of described surge bunker, is bolted between the two, and a cushion block is respectively installed in the both sides of described bolt;
Described charging switch valve is arranged between described feed bin and described surge bunker;
Described conveying pipeline is the ripply plastic hose of band, and the upper end of described conveying pipeline is connected with described surge bunker;
Described conveying pipeline is through the centre hole of described feed bin base bottom, and the lower end of described conveying pipeline is enclosed within outside the cloth tube of described distributing device;
The bottom of described surge bunker is placed in the framework of described feed bin pedestal.
2. catalyst charge device as claimed in claim 1, is characterized in that:
Described feed bin comprises top feed bin, bottom feed bin, neck, feed bin protect frame and joint hinge;
The cross-sectional plane of described top feed bin, described neck is square, and the vertical section of described bottom feed bin is trapezoidal;
Described feed bin protects frame while weld with described neck, and another side has circular hole.
3. catalyst charge device as claimed in claim 1, is characterized in that:
Described surge bunker comprises hopper, short tube, flange plate and surge bunker and protects frame;
The below of described hopper is provided with described short tube, and the below of described short tube arranges described flange plate, and described surge bunker protects the opening part that frame is arranged at described hopper.
4. catalyst charge device as claimed in claim 1, is characterized in that:
Described charging switch valve comprises flashboard, pull bar and handle;
Described flashboard right end portion is a rectangle, and left end portion is one trapezoidal;
Described pull bar is steel pipe;
Described handle is a round steel.
5. catalyst charge device as claimed in claim 1, is characterized in that:
Described feed bin pedestal comprises base plate, pedestal, column and bracket;
Described base plate is square, and surrounding has circular hole, is connected with end cover connecting flange, and center has a circular hole, through described conveying pipeline and described distributing device;
Described pedestal comprises four channel-section steels, described four channel-section steels composition groined type, and the channel-section steel of described pedestal is connected with described base plate, and another side is connected with described column;
Described column is made up of four angle steel, and lower end is connected with described pedestal, and upper end is connected with described bracket;
Described bracket is made up of four angle steel, and described four angle steel composition is three-back-shaped, and described carrier direction square edge is down connected with the upper end of described column, and four square edges of described carrier direction level form pallet.
6. catalyst charge device as claimed in claim 1, is characterized in that:
Described distributing device is made up of cloth cover, cloth tube, locating plate, nest, adjusting lever, bottom adjusting nut, bottom jam nut, top adjusting nut, top jam nut, radius stay;
Described cloth cover is made up of steel plate, and its shape is circular platform type, and the bottom of described cloth cover has eight elongated holes equably;
Described cloth tube is made up of steel pipe, and upper end car has one section of profile of tooth, to improve and conveying pipeline Joint strenght;
Described locating plate is made up of three band steels, described three band steels 120 degree of angles each other, and the lower end of described locating plate is connected with the electric welding of described cloth tube lower end inner wall, and the upper end of described locating plate is connected with described nest electric welding;
Described nest is made up of unthreaded hole nut, and the inner ring of described nest is through described adjusting lever;
Described adjusting lever is made up of a round steel, and each car in two ends up and down of described adjusting lever has one section of outside thread, is respectively used to install described bottom adjusting nut, described bottom jam nut, described top adjusting nut and described top jam nut;
Described bottom adjusting nut, described top adjusting nut all adjust the distance between described cloth cover and described cloth tube;
Described bottom jam nut and described top jam nut ensure that after described adjusting nut mixes up spacing described adjusting nut immobilizes;
Described radius stay is made up of two band steels, and described two radius stays are welded as a whole with described cloth tube and described top adjusting nut respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177548.4A CN103449197B (en) | 2012-05-31 | 2012-05-31 | Catalyst charge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177548.4A CN103449197B (en) | 2012-05-31 | 2012-05-31 | Catalyst charge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103449197A CN103449197A (en) | 2013-12-18 |
| CN103449197B true CN103449197B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210177548.4A Expired - Fee Related CN103449197B (en) | 2012-05-31 | 2012-05-31 | Catalyst charge device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3880300A (en) * | 1974-03-28 | 1975-04-29 | Atlantic Richfield Co | Apparatus for distributing particulate material over a zone |
| JPH10310210A (en) * | 1997-05-08 | 1998-11-24 | Reon Seigyo Kiki Kk | Granule passage open/close valve and granule weighing device |
| CN201525642U (en) * | 2009-06-10 | 2010-07-14 | 中铁十三局集团第一工程有限公司 | Vertical charging device used for transporting concrete |
| CN201999538U (en) * | 2011-02-25 | 2011-10-05 | 东莞市东标能源技术有限公司 | Direct view feeding device |
| CN202170174U (en) * | 2011-07-16 | 2012-03-21 | 天津丰联管业有限公司 | Novel feeding device |
-
2012
- 2012-05-31 CN CN201210177548.4A patent/CN103449197B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3880300A (en) * | 1974-03-28 | 1975-04-29 | Atlantic Richfield Co | Apparatus for distributing particulate material over a zone |
| JPH10310210A (en) * | 1997-05-08 | 1998-11-24 | Reon Seigyo Kiki Kk | Granule passage open/close valve and granule weighing device |
| CN201525642U (en) * | 2009-06-10 | 2010-07-14 | 中铁十三局集团第一工程有限公司 | Vertical charging device used for transporting concrete |
| CN201999538U (en) * | 2011-02-25 | 2011-10-05 | 东莞市东标能源技术有限公司 | Direct view feeding device |
| CN202170174U (en) * | 2011-07-16 | 2012-03-21 | 天津丰联管业有限公司 | Novel feeding device |
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| CN103449197A (en) | 2013-12-18 |
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