CN209598188U - A kind of oxygen blast drainage device - Google Patents
A kind of oxygen blast drainage device Download PDFInfo
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- CN209598188U CN209598188U CN201920216447.0U CN201920216447U CN209598188U CN 209598188 U CN209598188 U CN 209598188U CN 201920216447 U CN201920216447 U CN 201920216447U CN 209598188 U CN209598188 U CN 209598188U
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Abstract
The application discloses a kind of oxygen blast drainage device, comprising: is provided with the mechanical arm of the fixture for clamping long nozzle；It is arranged in inside the long nozzle and is used for the oxygen blown oxygen blast mechanism of progress at blocking；And for providing the gas supply mechanism of oxygen to the oxygen blast mechanism；Wherein, the oxygen blast mechanism includes, piston tube, piston head in the piston tube is set, hollow in the middle part of the piston head, for the oxygen lance to offer oxygen at blocking, the oxygen lance is in above the piston head, the piston head can move long axis direction in the piston tube along the piston tube in the case where the oxygen that the gas supply mechanism provides is formed by the promotion of air-flow, and the piston head drives the oxygen lance to move together when moving along the long axis direction of the piston tube.Oxygen blast drainage device provided by the present application operates substitution man-hour manually hand-held oxygen-blowing gun using machine and up conveys oxygen lance, saves a large amount of labours.
Description
Technical field
This application involves metallurgical continuous casting technical fields, more particularly, to a kind of oxygen blast drainage device, for realizing under big packet
When square slide gate nozzle blocks, the oxygen blast of molten steel is drained.
Background technique
Continuous casting is the production technology that the molten steel after refining is continuously cast into steel billet.The process of continuous casting is mainly as follows: big packet
Be provided with molten steel to be cast, support the revolving platform that wraps greatly will be wrapped greatly by rotation and transport pouring position；Molten steel is wrapped greatly
Tundish is injected, molten steel is assigned in each crystallizer by tundish again；Crystallizer crystallizes molten steel quick solidification, forms casting
Part；Withdrawal straightening machine and crystallizing vibration device collective effect pull out the casting in crystallizer；After cooling, electromagnetic agitation, by casting
It is cut into the steel billet of certain length.
Wherein, big packet lower section is equipped with slide gate nozzle, connects below slide gate nozzle with long nozzle.Steel when casting, in big packet
Water successively passes through slide gate nozzle and long nozzle, finally injects tundish.Long nozzle protects molten steel during the falling process not and outside
Boundary's air contact, splashes when reducing the secondary oxidation reaction of molten steel, and preventing molten steel from falling into tundish, realizes the guarantor of steel stream
Shield casting.Slide gate nozzle is made of the filling pipe end and collector nozzle of aperture respectively.Collector nozzle makes the upper and lower mouth of a river with respect to filling pipe end sliding
Aperture when being completely coincident, slide gate nozzle opening degree is maximum, and when not being overlapped, slide gate nozzle is closed.To prevent high-temperature steel water-setting
It ties in having filled stuffing sand in the lower filling pipe end inner wall of temperature, filling pipe end, molten steel is prevented to advance into filling pipe end in casting.It is common
Stuffing sand have sea sand, river sand, refractory brick grain, chrome ore etc..Stuffing sand meets one layer of sintering of sintering formation rapidly after high-temperature molten steel
Layer.After slide gate nozzle is opened, unsintered stuffing sand is fallen, and sinter layer is then crushed under the gravity of top molten steel, molten steel
Slide gate nozzle is gone out, achievees the purpose that automatic casting.But if sinter layer is blocked up, sintering strength is excessively high or molten steel is at filling pipe end
Cold steel is condensed into, molten steel can not then be automatically fallen off, and lead to the blocking of ladle slide gate in billet.
Currently, most domestic steel mill carries out molten steel drainage to blocking by manual operation oxygen lance.Due under long nozzle
End and tundish distance are too close, and operator must first remove long nozzle, and one end of bending metal oxygen lance is mounted in oxygen blast
On rifle, then put in the collector nozzle of big packet lower section by holding oxygen-blowing gun the other end of oxygen lance.High temperature ring at blocking
Under border, oxygen lance is lighted by the oxygen exported in pipe, the vigorous combustion since top.The huge heat further generated that burns makes
Cold steel burning melting, also disintegrates sinter layer gradually.Since oxygen lance constantly burns consumption, operator needs constantly by oxygen blast
Pipe up pushes up, and until the bending end of oxygen lance is burnt out, palpus replacement oxygen lance continues to operate after burning-up.The process generally require two to
Everyone holds an oxygen-blowing gun while operating by three workers, could drain success by the long period.As it can be seen that manual operation oxygen blast is drawn
Stream needs to consume great labour.
Oxygen lance is up conveyed however, lacking one kind in the prior art and holding oxygen-blowing gun in person without worker, can be achieved with
The device of oxygen blast drainage.
Utility model content
In order to solve the above technical problems, the application provides a kind of oxygen blast drainage device, artificial hand is substituted using machine operation
It holds oxygen-blowing gun and up conveys oxygen lance, save a large amount of labours.
Technical solution provided by the present application is as follows:
A kind of oxygen blast drainage device, comprising:
It is provided with the mechanical arm of the fixture for clamping long nozzle；
It is arranged in inside the long nozzle and is used for the oxygen blown oxygen blast mechanism of progress at blocking；And
For providing the gas supply mechanism of oxygen to the oxygen blast mechanism；
Wherein,
The oxygen blast mechanism includes,
Piston tube,
Piston head in the piston tube is set, the piston head middle part is hollow,
For to providing the oxygen lance of oxygen at blocking,
The oxygen lance is in above the piston head,
The piston head can be in the case where the oxygen that the gas supply mechanism provides be formed by the promotion of air-flow in the piston
Long axis direction in pipe along the piston tube moves,
The piston head drives the oxygen lance to move together when moving along the long axis direction of the piston tube.
Preferably, the gas supply mechanism includes:
The escape pipe being connected to source of oxygen；
The air inlet block being connect with the escape pipe；And
One end is connected to the air inlet block, the bend pipe that the other end is connected to the piston tube.
Preferably, the escape pipe is arranged on the fixture, and the air inlet block is arranged in the long nozzle outer wall.
Preferably, the locating rack for fixing the piston tube is installed inside the long nozzle.
Preferably, the piston head is connect with the bottom end of the oxygen lance,
The piston tube is equipped with far from one end of gas supply mechanism for stopping the piston head to leave the piston tube and right
The oxygen lance has the block piece of guiding role, and the block piece middle part is hollow, and the oxygen lance can be in the middle part of the block piece
The piston tube is stretched out in hollow part.
Preferably, the piston tube has out on one end of the block piece and the side wall that is staggered with the block piece
Hole.
Preferably, the notch through side wall is provided on the side wall of the one end of the oxygen lance far from the piston head.
Preferably, the bend pipe is connect with the air inlet block by detachable connector.
Preferably, the bend pipe bending place package is provided with heat-barrier material.
Preferably, described escape pipe one end is tapered, and air inlet block one end is recessed, the cone of female end and the escape pipe
Shape end docking, the air inlet block can upwards, downwards, be moved to the left or right.
Oxygen blast drainage device provided by the utility model, when being mainly used for realizing big packet lower section slide gate nozzle blocking, to steel
The oxygen blast of water drains, and without worker in continuous casting execute-in-place, completes entire oxygen blast drainage process by machine.When molten steel can not
When flowing out automatically from the slide gate nozzle of big packet lower section, former long nozzle is removed, starts to operate oxygen blast drainage provided by the utility model
Device, long nozzle are internally provided with for carrying out oxygen blown oxygen blast mechanism at nozzle blocking to wrapping greatly, and gas supply mechanism is to oxygen blast
Mechanism provides oxygen, and mechanical arm drives fixture mobile, clamps long nozzle, then drives under long nozzle and big packet lower section slide gate nozzle
Mouth of a river docking.Oxygen enters oxygen blast mechanism at this time, and piston head pushes oxygen lance upward in the case where oxygen is formed by the promotion of air-flow
Movement, oxygen lance stretch out piston tube, move upwards along collector nozzle, until encountering at blocking.On the one hand, hyperbaric oxygen blows out oxygen lance
Being formed by impact force can make sinter layer broken；On the other hand, oxygen, which lights oxygen lance, makes cold steel burning be melt into flow-like, most
Achieve the effect that molten steel drains afterwards.After oxygen blast drains successfully, mechanical arm drives long nozzle to unload from collector nozzle.
Mechanical arm drives fixture clamping to be provided with the long nozzle of oxygen blast mechanism, holds oxygen-blowing gun instead of worker.Oxygen blast machine
Piston head in structure pushes oxygen lance to move upwards under the airflow function that oxygen is formed, instead of manually pushing up oxygen lance upwards
Process.The utility model saves a large amount of manpowers instead of artificial oxygen blast drainage procedure.Meanwhile the utility model and artificial
Oxygen blast drainage is compared, and the molten steel for having used long nozzle protection to fall prevents molten steel splashing from causing worker's injures and deaths, and reduces molten steel
Secondary oxidation reaction, the molding casting of molten steel may be implemented, improve the quality of continuous casting.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of oxygen blast drainage device provided by the embodiment of the utility model；
Fig. 2 is the local longitudal section schematic diagram of oxygen blast drainage device provided by the embodiment of the utility model；
Fig. 3 is the partial structural diagram of oxygen blast drainage device provided by the embodiment of the utility model；
Appended drawing reference: 1- long nozzle；2- gas supply mechanism；21- escape pipe；22- air inlet block；23- bend pipe；3- fixture；4- machine
Tool arm；5- oxygen blast mechanism；51- piston tube；52- piston head；53- oxygen lance；6- block piece；The detachable connector of 7-；8- positioning
Frame；9- heat-barrier material.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
It should be noted that it can directly exist when element is referred to as on " being fixed on " or " being set to " another element
On another element or indirectly setting on the other element；When an element is known as " being connected to " another element,
It can be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", under ", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.It is multiple in the description of the present application ", " several " be meant that two or
Two or more, unless otherwise specifically defined.
It should be clear that structure depicted in this specification attached drawing, ratio, size etc., only to cooperate specification revealed
Content is not limited to the enforceable qualifications of the application, therefore does not have so that those skilled in the art understands and reads
Technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the application institute energy
Under the effect of generation and the purpose that can reach, it should all still fall in techniques disclosed in this application content and obtain the range that can cover
It is interior.
The utility model embodiment is write in a progressive manner.
As shown in Figures 1 to 3, the utility model embodiment provides a kind of oxygen blast drainage device, comprising:
It is provided with the mechanical arm 4 of the fixture 3 for clamping long nozzle 1；
It is arranged in inside the long nozzle 1 and is used for the oxygen blown oxygen blast mechanism 5 of progress at blocking；And
For providing the gas supply mechanism 2 of oxygen to the oxygen blast mechanism 5；
Wherein,
The oxygen blast mechanism 5 includes,
Piston tube 51,
Piston head 52 in the piston tube 51 is set, 52 middle part of piston head is hollow,
For to providing the oxygen lance 53 of oxygen at blocking,
The oxygen lance 53 is in 52 top of piston head,
The piston head 52 can be in the case where the oxygen that the gas supply mechanism 2 provides be formed by the promotion of air-flow in the work
Long axis direction in plug pipe 51 along the piston tube 51 moves,
The piston head 52 drives the oxygen lance 53 to move together when moving along the long axis direction of the piston tube 51.
Oxygen blast drainage device provided by the utility model, when being mainly used for realizing big packet lower section slide gate nozzle blocking, to steel
The oxygen blast of water drains.When molten steel can not be flowed out from the slide gate nozzle of big packet lower section automatically, former long nozzle is removed, starts to operate this
The oxygen blast drainage device that utility model provides.Firstly, installation is for wrapping progress oxygen blast at nozzle blocking to big in long nozzle 1
Oxygen blast mechanism 5, gas supply mechanism 2 be used for oxygen blast mechanism 5 provide oxygen.Mechanical arm 4 drives fixture 3 mobile, clamps long nozzle
1, then long nozzle 1 and the collector nozzle of big packet lower section slide gate nozzle is driven to dock.Oxygen enters oxygen blast mechanism 5, piston head 52 at this time
In the case where oxygen is formed by the promotion of air-flow, oxygen lance 53 is pushed to move upwards, oxygen lance 53 stretches out piston tube 51, along collector nozzle
It moves upwards, until encountering at blocking.After oxygen blast drains successfully, mechanical arm 4 drives long nozzle 1 to unload from collector nozzle.
Mechanical arm 4 drives fixture 3 to clamp the long nozzle 1 for being provided with oxygen blast mechanism 5, holds oxygen-blowing gun instead of worker.It blows
Piston head 52 in oxygen mechanism 5 pushes oxygen lance 53 to move upwards under the airflow function that oxygen is formed, instead of will manually blow
The process that oxygen pipe pushes up upwards.The utility model saves a large amount of manpowers instead of artificial oxygen blast drainage procedure.Meanwhile this is practical
It is novel that the molten steel for having used long nozzle protection to fall prevents molten steel splashing from causing worker's injures and deaths compared with artificial oxygen blast drainage, and
The secondary oxidation reaction for reducing molten steel, may be implemented the molding casting of molten steel, improves the quality of continuous casting.
Preferably, the gas supply mechanism 2 includes:
The escape pipe 21 being connected to source of oxygen；
The air inlet block 22 being connect with the escape pipe 21；And
One end is connected to the air inlet block 22, the bend pipe 23 that the other end is connected to the piston tube 51.
Oxygen is exported from source of oxygen, by escape pipe 21, into air inlet block 22, by the guidance of bend pipe 23, into setting
In the piston tube 51 in long nozzle 1.
Preferably, the escape pipe 21 is arranged on the fixture 3, and the air inlet block 22 is arranged outside the long nozzle 1
Wall.
A kind of more preferred mode is that the escape pipe 21 is arranged on the fixture 3, and the air inlet block 22 is arranged
In 1 outer wall of long nozzle.After fixture 3 clamps long nozzle 1, the air inlet block 22 of escape pipe 21 and 1 outer wall of long nozzle on fixture 2
Oxygen blast preparation is carried out in docking.After the completion of long nozzle 1 is docked with collector nozzle, oxygen passes sequentially through escape pipe 21, air inlet block 22, curved
Pipe 23, into oxygen blast mechanism 5.The preferred embodiment fixture 3 clamp long nozzle 1 while realize gas supply mechanism 2 with
The docking of oxygen blast mechanism 5 saves labour instead of artificial connection gas supply mechanism 2 and oxygen blast mechanism 5, and saves operation
Total time, improve the working efficiency of oxygen blast drainage device.
Preferably, the locating rack 8 for fixing the piston tube 51 is installed inside the long nozzle 1.
Locating rack 8 is set, piston tube 51 on the one hand can be played the role of to be fixed on long nozzle 1；On the other hand, it blows
The drainage effect that oxygen pipe 53 reaches at the contact blocking of slide gate nozzle center is best, but piston tube 51 is under the action of air-flow
It is easy to swing inside long nozzle 1, locating rack 8 can make oxygen lance 53 be pushed out the entrance of Shi Nengcong collector nozzle center.
Preferably, the piston head 52 is connect with the bottom end of the oxygen lance 53,
The piston tube 51 is equipped with far from one end of gas supply mechanism 2 for stopping the piston head 52 to leave the piston tube
51 and there is the block piece 6 of guiding role to the oxygen lance 53,6 middle part of block piece is hollow, and the oxygen lance 53 can be from institute
It states 6 middle part hollow part of block piece and stretches out the piston tube 51.
In actual use, thrust caused by the air-flow that oxygen is formed may be excessive, makes piston head 52 oxygen lance
53 all release piston tube 51, cause oxygen lance 53 to be detached from piston tube 51, can not continue upward movement.Reality as one preferred
Mode is applied, piston head 52 is connect with the bottom end of oxygen lance 53, piston tube 51 is equipped with far from one end of gas supply mechanism 2 for stopping
Piston head 52 leaves piston tube 51 and has the block piece 6 of guiding role to oxygen lance 53,6 hollow, the oxygen lance 53 in middle part of block piece
Piston tube 51 can be stretched out from 6 middle part hollow part of block piece.The oxygen lance that block piece 6 can stop piston head 52 and connect with piston head
53 release piston tube 51 by air-flow, but not hinder oxygen lance 53 to move upwards, and have guiding role to oxygen lance 53.Block piece
6 can cover in piston tube 51, fill in piston tube 51 or be fixed in piston tube 51 etc..
Preferably, the piston tube 51 has on one end of the block piece 6 and the side wall that is staggered with the block piece 6
Aperture.
Since block piece 6 keeps the one end of piston tube 51 far from gas supply mechanism 2 no longer completely open, part of oxygen passes through work
Gap between 51 inner wall of chock plug 52 and piston tube is upward, forms air pressure in piston tube 51, acts on piston head 52 downwards, make
Piston head 52 is difficult to move upwards.A kind of more preferred embodiment is, piston tube 51 close to block piece 6 one end and with resistance
There is aperture on the side wall that block piece 6 is staggered, that is, in piston tube 51 close to one end of block piece 6 and the side wall that is not overlapped with block piece 6
On have aperture.The portion gas in piston tube 51 can be discharged in above-mentioned aperture, reduce intraductal atmospheric pressure, be easier piston head 52 by gas
Flow to promotion.
Preferably, the notch through side wall is provided on the side wall of the one end of the oxygen lance 53 far from the piston head 52.
Oxygen lance 53 moves upwards encounter at blocking after, may be inserted at blocking in the steel of semi-molten state, oxygen lance
53 tops are plugged, and oxygen can not be discharged.A kind of preferred mode is, on the side wall of the one end of oxygen lance 53 far from piston head 52
It is provided with the notch through side wall, for exporting oxygen.
Preferably, the bend pipe 23 is connect with the air inlet block 22 by detachable connector 7.
After being drained successfully due to oxygen blast, oxygen blast mechanism 5 and bend pipe 23 and the steel contacts flowed down, easily thawing are deformed, because
This bend pipe 23 and oxygen blast mechanism 5 are preferably disposable apparatus.Bend pipe 23 in the utility model embodiment can be excellent with air inlet block 22
Selection of land is connected by detachable connector 7, facilitates the replacement of disposable apparatus.Detachable connector 7 can be more preferably to block
Shell type connector improves the efficiency of replacement.
Preferably, 23 bending place of the bend pipe package is provided with heat-barrier material 9.
The bending place of bend pipe 23 is in 1 lower part of long nozzle, the molten steel in the tundish of lower section, extreme temperatures.This is practical
23 bending place of bend pipe in new embodiment can be coated with being provided with heat-barrier material 9, and bend pipe 23 is too from molten steel when preventing oxygen blast
Closely, melt deformation.Certainly, above-mentioned heat-barrier material 9 can be more preferably insulation cotton, play the role of completely cutting off heat.
Preferably, described 21 one end of escape pipe is tapered, and described 22 one end of air inlet block is recessed, female end and the escape pipe
21 tapered end docking, the air inlet block 22 can upwards, downwards, be moved to the left or right.
A kind of preferred mode is that 21 one end of escape pipe is tapered, and 22 one end of air inlet block is recessed, female end and escape pipe 21
Tapered end docking, air inlet block 22 can upwards, downwards, be moved to the left or right.When escape pipe 21 is docked with air inlet block 22 in this way,
Air inlet block 22, which is easier to dock with the tapered end of escape pipe 21, to coincide, and reduces stuck the case where can not separating at docking.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of oxygen blast drainage device characterized by comprising
It is provided with the mechanical arm (4) of the fixture (3) for clamping long nozzle (1)；
It is arranged in the long nozzle (1) inside for the oxygen blown oxygen blast mechanism (5) of progress at blocking；And
For providing the gas supply mechanism (2) of oxygen to the oxygen blast mechanism (5)；
Wherein,
The oxygen blast mechanism (5) includes,
Piston tube (51),
The piston head (52) being arranged in the piston tube (51), piston head (52) middle part is hollow,
For to providing the oxygen lance (53) of oxygen at blocking,
The oxygen lance (53) is in above the piston head (52),
The piston head (52) can be in the case where the oxygen that the gas supply mechanism (2) provide be formed by the promotion of air-flow in the work
It is mobile along the long axis direction of the piston tube (51) in plug pipe (51),
The piston head (52) drives the oxygen lance (53) to move together when mobile along the long axis direction of the piston tube (51).
2. oxygen blast drainage device according to claim 1, which is characterized in that the gas supply mechanism (2) includes:
The escape pipe (21) being connected to source of oxygen；
The air inlet block (22) being connect with the escape pipe (21)；And
One end is connected to the air inlet block (22), the bend pipe (23) that the other end is connected to the piston tube (51).
3. oxygen blast drainage device according to claim 2, which is characterized in that the escape pipe (21) is arranged in the fixture
(3) on, the air inlet block (22) is arranged in the long nozzle (1) outer wall.
4. oxygen blast drainage device as claimed in any of claims 1 to 3, which is characterized in that in the long nozzle (1)
Portion is equipped with the locating rack (8) for fixing the piston tube (51).
5. oxygen blast drainage device according to claim 1, which is characterized in that
The piston head (52) connect with the bottom end of the oxygen lance (53),
The piston tube (51) is equipped with far from the one end of gas supply mechanism (2) for stopping the piston head (52) to leave the piston
Pipe (51) and the block piece (6) for having guiding role to the oxygen lance (53), block piece (6) hollow, the oxygen blast in middle part
The piston tube (51) can be stretched out from hollow part in the middle part of the block piece (6) by managing (53).
6. oxygen blast drainage device according to claim 5, which is characterized in that the piston tube (51) is close to the block piece
(6) there is aperture on one end and the side wall being staggered with the block piece (6).
7. according to claim 1 to oxygen blast drainage device described in any one of 3,5,6, which is characterized in that the oxygen lance
(53) notch through side wall is provided on the side wall of one end far from the piston head (52).
8. oxygen blast drainage device as claimed in any of claims 2 to 3, which is characterized in that the bend pipe (23) with
The air inlet block (22) is connected by detachable connector (7).
9. oxygen blast drainage device as claimed in any of claims 2 to 3, which is characterized in that the bend pipe (23) is curved
Package is provided with heat-barrier material (9) at folding.
10. oxygen blast drainage device as claimed in any of claims 2 to 3, which is characterized in that the escape pipe (21)
One end is tapered, and described air inlet block (22) one end is recessed, and female end is docked with the tapered end of the escape pipe (21), the air inlet
Block (22) can upwards, downwards, be moved to the left or right.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920216447.0U CN209598188U (en) | 2019-02-20 | 2019-02-20 | A kind of oxygen blast drainage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920216447.0U CN209598188U (en) | 2019-02-20 | 2019-02-20 | A kind of oxygen blast drainage device |
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| CN209598188U true CN209598188U (en) | 2019-11-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160782A (en) * | 2022-01-14 | 2022-03-11 | 北京同创信通科技有限公司 | Oxygen combustion drainage system and use method thereof |
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2019
- 2019-02-20 CN CN201920216447.0U patent/CN209598188U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160782A (en) * | 2022-01-14 | 2022-03-11 | 北京同创信通科技有限公司 | Oxygen combustion drainage system and use method thereof |
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