CN209043005U - A kind of chemical converter feeding seal structure - Google Patents
A kind of chemical converter feeding seal structure Download PDFInfo
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- CN209043005U CN209043005U CN201821778279.6U CN201821778279U CN209043005U CN 209043005 U CN209043005 U CN 209043005U CN 201821778279 U CN201821778279 U CN 201821778279U CN 209043005 U CN209043005 U CN 209043005U
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Abstract
The utility model relates to the discharging system technical field of chemical converter, in particular to a kind of chemical converter feeding seal structure.The feeding cylinder for thering is diameter to be less than furnace body by the feed end coaxial welding in furnace body, material feeding box is fixedly connected with feeding seal outer cylinder by connecting flange, the feeding seal outer cylinder of sealing ring and outside that feeding cylinder is embedded by its outside is rotatablely connected, guarantee that feeding cylinder and extraneous holding are sealed by the interference fit of sealing ring and feeding seal outer tube inner wall, due to feeding cylinder, feeding seal outer cylinder is coaxially disposed with furnace body, when furnace body expands with heat and contract with cold and causes furnace body that axial elongation occurs or shrinks, since sealing ring and feeding seal outer tube inner wall are still able to maintain interference fit, it will not influence furnace body and extraneous sealing, to avoid material from leaking, effectively improve the efficiency and yield of converter.
Description
Technical field
The utility model relates to the discharging system technical field of chemical converter, in particular to a kind of chemical converter charging is close
Seal structure.
Background technique
During the work time, furnace body persistently rotates chemical converter, and because of the high temperature that is heated, and axial elongation is for up to the left side 100mm
The right side, and feed system should be then fixed on bracket, from fixed throat-fed, material is usually high temperature fine particle and harmful corruption
Solution is lost, and with strong volatilization flue gas in furnace body, therefore the leakproofness of sound joint is especially important.
At present the burner of chemical converter, furnace tail input and output material sealing use structure have: radial labyrinth formula sealing device and
Axial labyrinth seal device (see chemical standard HG21546.5-93)；Contact asbestos cord sealing device and contact asbestos cloth
(rubber strip) sealing device (see chemical standard HG21546.6-93)；Weight traction compresses dynamic and static ring sealing burner cover structure；Casting
Iron piston ring packing feed device；Graphite block compresses outer toroid sealing device；Cylinder/hydraulic cylinder/spring compression dynamic and static ring burner
Sealing device；Flake type stainless steel substrates contact sealing device etc..
The above various sealing devices have respective many-sided disadvantage: flake type, labyrinth type and graphite block seal close
It is general to seal effect, there is different degrees of gas leakage, material leakage phenomenon；There are resistance abrasions for dynamic and static ring sealing greatly, replacement is frequent, charging
Mouth extends mobile and influences charging precision, telescopic joint can only be used to compensate to make up the mobile problem of feed inlet with furnace body；Casting
Then there is the disadvantages of size is small, abrasion is big, axial stretching amount is limited in iron piston ring.And the structure of various devices is more complicated,
Processing, installation difficulty are larger.
Utility model content
It is processing, easy for installation the technical problem to be solved by the utility model is to provide a kind of simple and compact for structure, it is close
Sealing property is reliable, can effectively improve a kind of chemical converter feeding seal structure of efficiency and converter yield.
In order to solve the above-mentioned technical problem, a kind of the technical solution adopted in the utility model are as follows: chemical converter feeding seal
Structure, including support frame, furnace body, feeding cylinder, sealing ring, feeding seal outer cylinder, conveying outer cylinder and material feeding box；
The material feeding box is fixed on the support frame；
The feed end coaxial welding of the furnace body have diameter be less than furnace body feeding cylinder, the feed end of the feeding cylinder with into
Hopper rotation connection；
The outer surface of the feeding cylinder is equipped with positioning ring, and the positioning ring is equipped with circle shape groove, and the sealing ring is embedded
In the circle shape groove of positioning ring, the outer surface of the sealing ring is higher by positioning ring surface；The sealing ring is that bipack-film is close
Seal ring；
It is interference fitted on the outside of the inside of the feeding seal outer cylinder and sealing ring, the feeding seal outer cylinder is close to feed end
Place is equipped with the first connecting flange, and the material feeding box is equipped with the second connecting flange corresponding with the first connecting flange, the material feeding box
It is sealed against each other and is connect with bolt by the first connecting flange and the second connecting flange with feeding seal outer cylinder；
The conveying outer cylinder being coaxially disposed with furnace body is equipped with inside the material feeding box, the discharge end of the conveying outer cylinder is overhung at
The feed end of furnace body.
Further, gap is equipped between the inner wall of feeding seal outer cylinder on the outside of the positioning ring, with sealing ring internal diameter
Gap between the slot bottom diameter of the ring groove of positioning ring is corresponding.
Further, chamfering is equipped on the inside of the discharging direction end of the feeding seal outer cylinder.
Further, spiral stock guide, the spiral guide are equipped in the gap between the feeding cylinder and conveying outer cylinder
The feed direction of plate is opposite with the feed direction of conveying outer cylinder.
Further, the conveying outer barrel is equipped with conveyer device&apos, and the conveyer device&apos are for sending material to furnace body
It is internal.
Further, the discharge end of the conveying outer cylinder is equipped with upward inclined surface, the axial direction of the inclined surface and furnace body
At 45-85 degree angle.
Further, the feed end of the material feeding box is equipped with charging flange, and the material feeding box passes through charging flange and conveying
Outer cylinder is fixedly connected.
Further, the side of the material feeding box is equipped with manhole.
Further, the lower end of the material feeding box is equipped with gate valve.
Further, the upper end of the material feeding box is equipped with gas outlet, is connected with outlet flange at the gas outlet.
The utility model has the beneficial effects that: passing through in chemical converter feeding seal structure provided by the utility model
The feed end coaxial welding of furnace body have diameter be less than furnace body feeding cylinder, material feeding box by connecting flange be fixedly connected feed it is close
Seal outer cylinder, the feeding seal outer cylinder rotation connection of sealing ring and outside that feeding cylinder is embedded by its outside, by sealing ring and
The interference fit of feeding seal outer tube inner wall come guarantee feeding cylinder and it is extraneous keep sealing, due to feeding cylinder, feeding seal outer cylinder
It is coaxially disposed with furnace body, when furnace body expands with heat and contract with cold and causes furnace body that axial elongation occurs or shrinks, due to sealing ring
It is moved axially in feeding seal outer cylinder with feeding cylinder, sealing ring and feeding seal outer tube inner wall are still able to maintain interference
Cooperation, will not influence furnace body and extraneous sealing effectively improves the efficiency and production of converter so that flue gas and material be avoided to leak
Amount；Above-mentioned chemical converter feeding seal is simple and compact for structure, processes, is easy for installation, in the case where furnace body expands with heat and contract with cold
Still it is able to maintain reliable sealing performance.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of chemical converter feeding seal structure of specific embodiment of the present invention；
Label declaration:
1-1, furnace body；1-2, positioning ring；1-3, feeding cylinder；1-4, spiral stock guide；2, sealing ring；
3-1, feeding seal outer cylinder；3-2, the first connecting flange；4, bolt；5-1, the second connecting flange；5-2, material feeding box；
5-3, outlet flange；5-4, charging flange；5-5, manhole；5-6, gate valve；
6-1, conveying outer cylinder；6-2, conveyer device&apos.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: when furnace body expands with heat and contract with cold cause furnace body occur axial elongation or
When contraction, since sealing ring and feeding seal outer tube inner wall are still able to maintain interference fit, furnace body and the external world will not influence
Sealing, so that flue gas and material be avoided to leak.
Please refer to Fig. 1, the utility model relates to a kind of chemical converter feeding seal structure, including support frame, furnace body 1-1,
Feeding cylinder 1-3, sealing ring 2, feeding seal outer cylinder 3-1, conveying outer cylinder 6-1 and material feeding box 5-2；
The material feeding box 5-2 is fixed on the support frame；
The feeding cylinder 1-3, the feeding cylinder 1-3 that the feed end coaxial welding of the furnace body 1-1 has diameter to be less than furnace body 1-1
Feed end and material feeding box 5-2 be rotatablely connected；
The outer surface of the feeding cylinder 1-3 is equipped with positioning ring 1-2, and the positioning ring 1-2 is equipped with circle shape groove, described close
Seal ring 2 is embedded in the circle shape groove of positioning ring 1-2, and the outer surface of the sealing ring 2 is higher by the surface positioning ring 1-2；It is described
Sealing ring 2 is bipack-film sealing ring；
It is interference fitted on the outside of the inside of the feeding seal outer cylinder 3-1 and sealing ring 2, the feeding seal outer cylinder 3-1 is leaned on
It is equipped with the first connecting flange 3-2, the material feeding box 5-2 at nearly feed end and is equipped with the second company corresponding with the first connecting flange 3-2
Acting flange 5-1, the material feeding box 5-2 and feeding seal outer cylinder 3-1 pass through the first connecting flange 3-2 and the second connecting flange 5-1
Connection is sealed against each other with bolt 4；
The conveying outer cylinder 6-1 being coaxially disposed with furnace body 1-1 is equipped with inside the material feeding box 5-2, the conveying outer cylinder 6-1's
Discharge end is overhung at the feed end of furnace body 1-1.
The principle of above-mentioned chemical converter feeding seal structure illustrates: furnace body 1-1 is supported by wheel holding mechanism, is driven by gear,
It is rotated around furnace body 1-1 center line, heats up, expand with heat and contract with cold as furnace body 1-1 works, furnace body 1-1 axial elongation, for up to
100mm or more, and when furnace body 1-1 stops working, temperature decline, axial retraction；When furnace body 1-1 extends or shrinks, so that its
Axial displacement occurs for the feeding cylinder 1-3 of feed end coaxial welding, so that the sealing ring 2 being embedded on positioning ring 1-2 is in the axial direction
It is mobile；Since in the course of work, the position of material feeding box 5-2 is constant, material feeding box 5-2 is connected by the first connecting flange 3-2 and second
The holding position feeding seal outer cylinder 3-1 of acting flange 5-1 connection is constant, so that sending out between feeding seal outer cylinder 3-1 and sealing ring 2
Raw axial relative displacement, and relative displacement be still able to maintain between sealing ring 2 and feeding seal outer cylinder 3-1 be interference fitted and
Furnace interior and extraneous sealing are kept, flue gas caused by the thermal boundary shrinkage of furnace body 1-1 and material leakage are effectively prevented.
Above-mentioned sealing ring 2 is the hole the FK6-ASD lamination sealing ring of FEY company, Germany production, and every group is made of two pieces, often
Part is the helical form being adjacent to, and material is CrNi (DIN1.4310) or 50CrV4 (DIN1.8159), 450 DEG C of high temperature resistant or more.Institute
Stating one group of two pieces of sealing ring 2 can screw in manually in the annular groove fixed to the positioning ring 1-2, with furnace body 1-1
Rotation.
In above-mentioned chemical converter feeding seal structure, there is diameter to be less than furnace by the feed end coaxial welding in furnace body 1-1
The feeding cylinder 1-3 of body 1-1, material feeding box 5-2 are fixedly connected with feeding seal outer cylinder 3-1 by connecting flange, and feeding cylinder 1-3 passes through it
The feeding seal outer cylinder 3-1 of sealing ring 2 and outside that outside is embedded is rotatablely connected, and passes through sealing ring 2 and feeding seal outer cylinder 3-1
The interference fit of inner wall come guarantee feeding cylinder 1-3 and it is extraneous keep sealing, due to feeding cylinder 1-3, feeding seal outer cylinder 3-1 and
Furnace body 1-1 coaxial arrangement, when furnace body 1-1 expands with heat and contract with cold and causes furnace body 1-1 that axial elongation occurs or shrinks, due to close
Seal ring 2 moves axially in feeding seal outer cylinder 3-1 with feeding cylinder 1-3, in sealing ring 2 and feeding seal outer cylinder 3-1
Wall is still able to maintain interference fit, and will not influence furnace body 1-1 and extraneous sealing has so that flue gas and material be avoided to leak
Effect improves the efficiency and yield of converter；Above-mentioned chemical converter feeding seal is simple and compact for structure, processes, is easy for installation, in furnace body
1-1 is still able to maintain reliable sealing performance in the case where expanding with heat and contract with cold.
Further, it is equipped in gap, with sealing ring 2 between the inner wall of feeding seal outer cylinder 3-1 on the outside of positioning ring 1-2
Gap between the slot bottom diameter of the ring groove of diameter and positioning ring 1-2 is corresponding.
Seen from the above description, pass through the gap on the outside of positioning ring 1-2 between feeding seal outer cylinder 3-1 inner wall, sealing
Correspondence gap between the slot bottom diameter of the ring groove of 2 internal diameter of ring and positioning ring 1-2, sealing ring 2 can be in feeding seal outer cylinders
It floats between 3-1 and feeding cylinder 1-3, reduces the feeding cylinder 1-3 and positioning ring 1-2 and static feeding seal outer cylinder 3-1 of rotation
Between concentricity requirement, make manufacture and it is easier for installation, reduce abrasion.
Further, in above-mentioned chemical converter feeding seal structure, in the discharging direction end of the feeding seal outer cylinder 3-1
Side is equipped with chamfering.
Seen from the above description, by the way that chamfering is arranged on the inside of the discharging direction end of feeding seal outer cylinder 3-1, when push into
When material sealed outer cylinder 3-1 installation is nested into 2 outside of sealing ring that oneself is fixed in the annular groove of positioning ring 1-2, chamfering can be auxiliary
It helps radial compression to seal 2, shrinks sealing ring 2 radially, form the outside tension of diameter, it is feeding seal outer cylinder 3-1 is quick, quasi-
It really is set on the outside of feeding cylinder 1-3, is interference fitted it with sealing ring 2, makes the easier for installation of sealing structure.
Further, in above-mentioned chemical converter feeding seal structure, between the feeding cylinder 1-3 and conveying outer cylinder 6-1
Spiral stock guide 1-4, the feed direction phase of the feed direction and conveying outer cylinder 6-1 of the spiral stock guide 1-4 are equipped in gap
Instead.
Seen from the above description, by opposite with feed direction in feeding cylinder 1-3 and setting in the gap of conveying outer cylinder 6-1
Spiral stock guide 1-4, by the material that is leaked in furnace body 1-1 in feeding cylinder 1-3 can under the action of spiral stock guide 1-4 it is defeated
It send into material feeding box 5-2, facilitates the centralized collection of material leakage.
Further, in above-mentioned chemical converter feeding seal structure, conveyer device&apos 6- is equipped with inside the conveying outer cylinder 6-1
2, the conveyer device&apos 6-2 are for sending material to furnace body 1-1.
Further, in above-mentioned chemical converter feeding seal structure, the discharge end of the conveying outer cylinder 6-1 is equipped with upward
Inclined surface, the inclined surface and furnace body 1-1's is axial at 45-85 degree angle.
Seen from the above description, by the way that upward inclined surface is arranged in the discharge end of conveying outer cylinder 6-1, make material by conveying
When outer cylinder 6-1 is conveyed into furnace body 1-1, the agglomerating anxious pendant of material is avoided, is conducive to material and equably diffuses in furnace body 1-1.
Further, in above-mentioned chemical converter feeding seal structure, the feed end of the material feeding box 5-2 is equipped with charging flange
5-4, the material feeding box 5-2 are fixedly connected by charging flange 5-4 with conveying outer cylinder 6-1.
Further, in above-mentioned chemical converter feeding seal structure, the side of the material feeding box 5-2 is equipped with manhole 5-5.
Seen from the above description, by the way that manhole 5-5 is arranged in the side of material feeding box 5-2, staff can pass through maintenance
5-5 observation in hole checks that the material leakage in material feeding box 5-2 accumulates situation.
Further, in above-mentioned chemical converter feeding seal structure, the lower end of the material feeding box 5-2 is equipped with gate valve 5-6.
Seen from the above description, it by the way that gate valve 5-6 is arranged in the lower end of material feeding box 5-2, is arranged for separated in time
Material leakage out.
Further, in above-mentioned chemical converter feeding seal structure, the upper end of the material feeding box 5-2 is equipped with gas outlet, institute
It states and is connected with outlet flange 5-3 at gas outlet.
Seen from the above description, by the way that gas outlet is arranged in the upper end of material feeding box 5-2, gas outlet passes through outlet flange 5-3
It is connect with exhaust piping, in order to the recycling of exhaust gas.
Embodiment 1
A kind of chemical converter feeding seal structure, including support frame, furnace body 1-1, feeding cylinder 1-3, sealing ring 2, charging it is close
Seal outer cylinder 3-1, conveying outer cylinder 6-1 and material feeding box 5-2；The material feeding box 5-2 is fixed on the support frame；The furnace body 1-1 into
Material end coaxial welding has the feed end of feeding cylinder 1-3, the feeding cylinder 1-3 of the diameter less than furnace body 1-1 and material feeding box 5-2 to turn
Dynamic connection；The outer surface of the feeding cylinder 1-3 is equipped with positioning ring 1-2, and the positioning ring 1-2 is equipped with circle shape groove, described close
Seal ring 2 is embedded in the circle shape groove of positioning ring 1-2, and the outer surface of the sealing ring 2 is higher by the surface positioning ring 1-2；It is described
Sealing ring 2 is bipack-film sealing ring；Radial direction of the inside and 2 outside of sealing ring of the feeding seal outer cylinder 3-1 due to sealing ring 2
Outer tension and form interference fit, the feeding seal outer cylinder 3-1 is equipped with the first connecting flange 3-2 at feed end, described
Material feeding box 5-2 is equipped with second connecting flange 5-1 corresponding with the first connecting flange 3-2, outside the material feeding box 5-2 and feeding seal
Cylinder 3-1 seals against each other connection by the first connecting flange 3-2 and the second connecting flange 5-1 bolt 4；In the material feeding box 5-2
Portion is equipped with the conveying outer cylinder 6-1 that is coaxially disposed with furnace body 1-1, the discharge end of the conveying outer cylinder 6-1 be overhung at furnace body 1-1 into
Expect end.
Gap is equipped on the outside of the positioning ring 1-2 between the inner wall of feeding seal outer cylinder 3-1, with 2 internal diameter of sealing ring and
Gap between the slot bottom diameter of positioning ring 1-2 ring groove is corresponding.It is set on the inside of the discharging direction end of the feeding seal outer cylinder 3-1
There is chamfering.Spiral stock guide 1-4, the spiral stock guide are equipped in gap between the feeding cylinder 1-3 and conveying outer cylinder 6-1
The feed direction of 1-4 is opposite with the feed direction of conveying outer cylinder 6-1.Conveyer device&apos 6-2 is equipped with inside the conveying outer cylinder 6-1,
The conveyer device&apos 6-2 is for sending material to furnace body 1-1.The discharge end of the conveying outer cylinder 6-1 inclines equipped with upward
Inclined-plane, the inclined surface and furnace body 1-1's is axial at 45-85 degree angle.The feed end of the material feeding box 5-2 is equipped with charging flange
5-4, the material feeding box 5-2 are fixedly connected by charging flange 5-4 with conveying outer cylinder 6-1.The side of the material feeding box 5-2 is equipped with
Manhole 5-5.The lower end of the material feeding box 5-2 is equipped with gate valve 5-6.The upper end of the material feeding box 5-2 is equipped with gas outlet, described
Outlet flange 5-3 is connected at gas outlet.
Embodiment 2
In embodiment 1, change furnace body 1-1 tip plate configurations and spiral stock guide 1-4 rotation direction, cancels conveying outer cylinder 6-1 and defeated
After expecting spiral, structure can be used for the discharge system of chemical converter, simplify whole set equipment mechanism.
In conclusion in chemical converter feeding seal structure provided by the utility model, it is same by the feed end in furnace body
Axis is welded with the feeding cylinder that diameter is less than furnace body, and material feeding box is fixedly connected with feeding seal outer cylinder by connecting flange, and feeding cylinder is logical
The feeding seal outer cylinder rotation connection for crossing sealing ring and outside that its outside is embedded, passes through sealing ring and feeding seal outer tube inner wall
Interference fit come guarantee feeding cylinder and it is extraneous keep sealing, since feeding cylinder, feeding seal outer cylinder are coaxially disposed with furnace body,
When furnace body expands with heat and contract with cold and causes furnace body that axial elongation occurs or shrinks, due to sealing ring and feeding seal outer tube inner wall
It is still able to maintain interference fit, furnace body is will not influence and extraneous sealing effectively improves so that flue gas and material be avoided to leak
The efficiency and yield of converter；Above-mentioned chemical converter feeding seal is simple and compact for structure, processes, is easy for installation, and heat occurs in furnace body
Reliable sealing performance is still able to maintain in the case where swollen shrinkage.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck
Domain is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of chemical converter feeding seal structure, which is characterized in that including support frame, furnace body, feeding cylinder, sealing ring, charging
Sealed outer cylinder, conveying outer cylinder and material feeding box；
The material feeding box is fixed on the support frame；
The feeding cylinder that the feed end coaxial welding of the furnace body has diameter to be less than furnace body, the feed end and material feeding box of the feeding cylinder
Rotation connection；
The outer surface of the feeding cylinder is equipped with positioning ring, and the positioning ring is equipped with circle shape groove, and the sealing ring is embedded fixed
In the circle shape groove of position ring, the outer surface of the sealing ring is higher by positioning ring surface；The sealing ring is bipack-film sealing ring；
It is interference fitted on the outside of the inside of the feeding seal outer cylinder and sealing ring, the feeding seal outer cylinder is set at feed end
Have the first connecting flange, the material feeding box is equipped with the second connecting flange corresponding with the first connecting flange, the material feeding box with into
Expect that sealed outer cylinder seals against each other connection with bolt by the first connecting flange and the second connecting flange；
The conveying outer cylinder being coaxially disposed with furnace body is equipped with inside the material feeding box, the discharge end of the conveying outer cylinder is overhung at furnace body
Feed end.
2. chemical converter feeding seal structure according to claim 1, which is characterized in that on the outside of the positioning ring and feed
The gap pair between gap, with sealing ring internal diameter and the slot bottom diameter of the ring groove of positioning ring is equipped between the inner wall of sealed outer cylinder
It answers.
3. chemical converter feeding seal structure according to claim 1, which is characterized in that the feeding seal outer cylinder goes out
Expect to be equipped with chamfering on the inside of the end of direction.
4. chemical converter feeding seal structure according to claim 1, which is characterized in that the feeding cylinder and conveying outer cylinder
Between gap in be equipped with spiral stock guide, the feed direction of the spiral stock guide is opposite with the feed direction of conveying outer cylinder.
5. chemical converter feeding seal structure according to claim 1, which is characterized in that the conveying outer barrel is equipped with
Conveyer device&apos, the conveyer device&apos are for sending material to furnace interior.
6. chemical converter feeding seal structure according to claim 1, which is characterized in that the discharge end of the conveying outer cylinder
Equipped with upward inclined surface, the axial direction of the inclined surface and furnace body is at 45-85 degree angle.
7. chemical converter feeding seal structure according to claim 1, which is characterized in that the feed end of the material feeding box is set
There is charging flange, the material feeding box is fixedly connected by charging flange with conveying outer cylinder.
8. chemical converter feeding seal structure according to claim 1, which is characterized in that the side of the material feeding box is equipped with
Manhole.
9. chemical converter feeding seal structure according to claim 1, which is characterized in that the lower end of the material feeding box is equipped with
Gate valve.
10. chemical converter feeding seal structure according to claim 1, which is characterized in that the upper end of the material feeding box is set
There is gas outlet, outlet flange is connected at the gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821778279.6U CN209043005U (en) | 2018-10-31 | 2018-10-31 | A kind of chemical converter feeding seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821778279.6U CN209043005U (en) | 2018-10-31 | 2018-10-31 | A kind of chemical converter feeding seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209043005U true CN209043005U (en) | 2019-06-28 |
Family
ID=67040553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821778279.6U Active CN209043005U (en) | 2018-10-31 | 2018-10-31 | A kind of chemical converter feeding seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209043005U (en) |
-
2018
- 2018-10-31 CN CN201821778279.6U patent/CN209043005U/en active Active
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