CN111981250B - High-temperature gas recovery pipeline - Google Patents
High-temperature gas recovery pipeline Download PDFInfo
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- CN111981250B CN111981250B CN202010774653.0A CN202010774653A CN111981250B CN 111981250 B CN111981250 B CN 111981250B CN 202010774653 A CN202010774653 A CN 202010774653A CN 111981250 B CN111981250 B CN 111981250B
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- ring piece
- pipe body
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- large ring
- gas recovery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/12—Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to a high-temperature gas recovery pipeline, which relates to the technical field of gas conveying pipelines and comprises an outer pipe body, wherein an inner pipe body is arranged in the outer pipe body, a heat-insulating cotton layer is arranged between the outer pipe body and the inner pipe body, two ends of the outer pipe body and the inner pipe body are sealed through retaining pieces, the inner pipe body comprises a large ring piece and a small ring piece, the diameter of the large ring piece is larger than that of the small ring piece, the large ring piece and the small ring piece are sequentially overlapped along the axial direction of the outer pipe body, a fixing bolt is fixedly arranged on the inner wall of the outer pipe body, the fixing bolt sequentially penetrates through the heat-insulating cotton layer and the inner pipe body and is fixed through a tightening nut, and a buffer gap is reserved between the large ring piece and the small ring piece along the axial direction of the fixing bolt. The invention has the advantages of less heat loss, good heat insulation effect and long service life.
Description
Technical Field
The invention relates to the technical field of gas conveying pipelines, in particular to a high-temperature gas recovery pipeline.
Background
The coal is needed to be fired for high-temperature calcination in the steel making process, the gas generated by coal combustion needs to be matched with a fan to enter a hot blast stove for heating, a large amount of waste heat is also generated in the heated gas, the waste heat gas is often recovered for reducing the production cost, and a high-temperature-resistant pipeline is needed to be used for conveying the gas in the recovery process.
For example, the chinese utility model patent with the application number CN201721647233.6 discloses an anti-cracking and anti-dust blocking pipeline for a hot blast stove assembly line, which comprises a heat preservation box, wherein two circular plates are arranged in the heat preservation box; a gap is arranged between the two circular plates, and a gap is arranged between the side surface of each circular plate and the inner wall of the heat insulation box; one side of each circular plate is connected with a smoke exhaust pipe, and one end of each smoke exhaust pipe is arranged outside the heat preservation box; each smoke exhaust pipe is sleeved with heat insulation cotton which is positioned in the heat insulation box; the two sides of the heat preservation box are both connected with hot air pipes which are positioned between the two circular plates, and a filter screen is arranged in each hot air pipe; and a combustion furnace is connected to one of the smoke exhaust pipes.
According to the technical scheme, the heat insulation cotton is sleeved outside the smoke exhaust pipe and arranged in the heat insulation box, so that the heat insulation cotton can play a heat insulation role on hot air, and heat loss in the hot air is reduced; however, when the temperature in the smoke exhaust pipe is high, the smoke exhaust pipe is heated to expand, the smoke exhaust pipe is easy to deform and even damage after being used for a long time, and the service life of the pipeline is further influenced. Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-temperature gas recovery pipeline which has the effects of less heat loss, good heat insulation effect and long service life.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a high-temperature gas recovery pipeline, includes the outer body, the internal portion of outer body is equipped with interior body, be equipped with the cotton layer of heat preservation between outer body and the interior body, the both ends of outer body and interior body are sealed through the separation blade, interior body includes big ring piece and ringlet, the diameter of big ring piece is greater than the diameter of ringlet, big ring piece and ringlet overlap joint setting in proper order along the axis direction of outer body, the fixed fixing bolt that is provided with on the inner wall of outer body, fixing bolt passes in proper order cotton layer of heat preservation and interior body and fixes through screwing up the nut, big ring piece and ringlet the buffering clearance along fixing bolt's axis direction.
By adopting the technical scheme, when the pipeline is used, because the temperature of gas in the pipeline is higher, the inner pipeline body can expand under the action of high temperature, the large ring piece and the small ring piece can deform, and in the deformation process, a buffer gap reserved between the large ring piece and the small ring piece is used for buffering the deformation of the large ring piece and the small ring piece; when the pipeline is not used, the temperature in the pipeline is reduced, the large ring piece and the small ring piece retract, and the buffer gap between the large ring piece and the small ring piece is recovered again. The inner pipe body is provided with the large ring piece and the small ring piece which are arranged on the fixing bolt, and meanwhile, the buffer gap is reserved between the large ring piece and the small ring piece, so that the buffer gap has a buffer effect on the deformation of the large ring piece and the small ring piece in a high-temperature state, and the service life of the pipeline is prolonged; meanwhile, the heat insulation cotton layer is arranged, so that the heat insulation effect on the pipeline is achieved, and the loss of heat in the gas is reduced.
The present invention in a preferred example may be further configured to: the separation blade is formed by splicing a plurality of arc-shaped sheet bodies.
Through adopting above-mentioned technical scheme, be a plurality of curved lamellar bodies with the separation blade split, be convenient for on the one hand transport the separation blade, on the other hand is convenient for weld separation blade and outer body and interior body.
The present invention in a preferred example may be further configured to: and a gasket is arranged on the fixing bolt and is positioned between the inner pipe body and the tightening nut.
Through adopting above-mentioned technical scheme, installation gasket on fixing bolt, the gasket has increased the fixed effect of the internal body of screw up nut, has improved the stability of interior body installation, makes the cotton layer centre gripping effect of heat preservation better.
The present invention in a preferred example may be further configured to: the end part of the outer pipe body is provided with a flange plate used for being connected with a fan.
Through adopting above-mentioned technical scheme, the tip at outer body sets up the ring flange, and the ring flange is convenient for be connected convenient to use, reasonable in design with pipeline and fan.
The present invention in a preferred example may be further configured to: the material of the heat insulation cotton layer is a ceramic fiber cotton layer.
By adopting the technical scheme, the heat-insulating cotton layer is a ceramic fiber cotton layer, and the ceramic fiber cotton layer has the excellent characteristics of light weight, high strength, oxidation resistance, low heat conductivity, good flexibility, corrosion resistance, small heat capacity, sound insulation and the like, can effectively reduce the loss of heat, and has good heat-insulating property.
The present invention in a preferred example may be further configured to: the overlapped part of the large ring piece and the small ring piece is provided with a high-temperature resistant elastic piece, and the high-temperature resistant elastic piece is full of the buffer gap.
Through adopting above-mentioned technical scheme, set up high temperature resistant elastic sheet in big ring sum ringlet overlap joint position department mutually to make high temperature resistant elastic sheet be full of the buffering clearance, high temperature resistant elastic sheet can realize the bulging deformation that takes place between big ring sum ringlet on the one hand, and on the other hand can prevent that impurity in the gas from entering into the cotton layer of heat preservation through the buffering clearance, causes the corruption to the cotton layer of heat preservation, has improved the life of pipeline.
The present invention in a preferred example may be further configured to: the inner side wall of the large ring piece close to the small ring piece is provided with a sliding groove, and one end of the small ring piece close to the large ring piece is provided with an inserting ring which is matched with the sliding groove in an inserting mode.
Through adopting above-mentioned technical scheme, offer the spout in the one side that big ring piece is close to the ringlet piece, set up the grafting ring on the lateral wall of ringlet piece, utilize the grafting cooperation of grafting ring and spout, can realize the bulging deformation that takes place between big ring piece and the ringlet piece on the one hand, on the other hand can reduce impurity in the gas and enter into in the cotton layer of heat preservation through the buffering clearance.
The present invention in a preferred example may be further configured to: the inner wall of the large ring piece and the outer wall of the small ring piece are provided with a plurality of convex rings at one side close to each other, the diameters of the convex rings on the large ring piece are sequentially reduced along the axis of the large ring piece towards the end part direction of the large ring piece, and the diameters of the convex rings on the small ring piece are sequentially reduced along the axis of the small ring piece towards the end part direction of the small ring piece.
Through adopting above-mentioned technical scheme, set up a plurality of bulge loops on the inner wall of big ring piece and the outer wall of ringlet piece, when the internal pipe body is heated and takes place the inflation, big ring piece and ringlet piece all take place the inflation, the inflation in-process, the mutual overlap joint position department of big ring piece and ringlet piece is close to each other, the mutual butt of the in-process bulge loop that is close to, the temperature is higher, the inflation is more violent, the less bulge loop of diameter is because can not bear the stress that the deformation brought, the mutual extrusion dislocation of the less bulge loop of diameter, make the great bulge loop looks butt of diameter. The mutual butt of bulge loop can adapt to the inflation deformation that interior body took place, prevents that the dust in the steam from entering into the cotton layer of heat preservation, has played certain guard action to the cotton layer of heat preservation, simultaneously, when the internal temperature of inner tube still not enough makes it take place to warp, because the effect of bulge loop, can play the effect that blocks to the dust in the steam.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the inner pipe body is provided with the large ring piece and the small ring piece which are arranged on the fixing bolt, and meanwhile, the buffer gap is reserved between the large ring piece and the small ring piece, so that the buffer gap has a buffer effect on the deformation of the large ring piece and the small ring piece in a high-temperature state, and the service life of the pipeline is prolonged; meanwhile, the heat insulation cotton layer plays a role in heat insulation for the pipeline, and the loss of heat in the gas is reduced;
2. the high-temperature-resistant elastic piece is arranged at the lap joint position of the large ring piece and the small ring piece, and is filled with the buffer gap, so that the high-temperature-resistant elastic piece can realize the expansion deformation between the large ring piece and the small ring piece on one hand, and can prevent impurities in gas from entering the heat-insulation cotton layer through the buffer gap on the other hand, so that the heat-insulation cotton layer is corroded, and the service life of the pipeline is prolonged;
3. through set up the spout in the one side that big ring piece is close to the ringlet piece, set up the grafting ring on the lateral wall of ringlet piece, utilize the grafting cooperation of grafting ring and spout, can realize the bulging deformation that takes place between big ring piece and the ringlet piece on the one hand, on the other hand can reduce the impurity in the gas and enter into in the cotton layer of heat preservation through the buffering clearance.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic partial cross-sectional view of example 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of a high temperature resistant elastic sheet according to example 2 of the present invention;
FIG. 4 is a schematic sectional view showing the chute and the plug-in ring highlighted in embodiment 3 of the present invention;
FIG. 5 is a schematic cross-sectional view of embodiment 4 of the present invention showing the protruding ring.
In the figure, 1, an outer tube body; 2. an inner tube body; 21. a large ring piece; 22. a small ring piece; 3. a baffle plate; 4. a heat insulation cotton layer; 5. fixing the bolt; 6. screwing down the nut; 7. a buffer gap; 8. a gasket; 9. a high temperature resistant elastic sheet; 10. a chute; 11. a plug-in ring; 12. a convex ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
referring to fig. 1 and 2, the high-temperature gas recovery pipeline disclosed by the invention comprises a cylindrical outer pipe body 1, a cylindrical inner pipe body 2 is installed in the outer pipe body 1, two ends of the outer pipe body 1 and the inner pipe body 2 are connected through an annular baffle 3, a heat insulation cotton layer 4 is clamped between the outer pipe body 1 and the inner pipe body 2, and the heat insulation cotton layer 4 is a ceramic fiber cotton layer. The inner pipe body 2 comprises a large ring piece 21 and a small ring piece 22, the diameter of the large ring piece 21 is larger than that of the small ring piece 22, and the large ring piece 21 and the small ring piece 22 are sequentially overlapped along the axial direction of the outer pipe body 1.
The welding has cylindric fixing bolt 5 on the inner wall of outer body 1, and fixing bolt 5 passes cotton layer 4, large ring piece 21 and the little ring piece 22 of heat preservation in proper order, and fixing bolt 5 is kept away from the one end of outer body 1 and is installed through the screw thread and screw up nut 6, screws up nut 6 and is used for fixing cotton layer 4 of heat preservation and interior body 2. Wherein the large ring plate 21 and the small ring plate 22 leave the cushion gap 7 on the fixing bolt 5 in the axial direction thereof.
When the pipeline is used, because the temperature of gas in the pipeline is high, the inner pipe body 2 expands under the action of high temperature, the large ring piece 21 and the small ring piece 22 both deform, and in the deformation process, the buffer gap 7 reserved between the large ring piece 21 and the small ring piece 22 is used for buffering the deformation of the large ring piece 21 and the small ring piece 22; when the pipeline is not used, the temperature in the pipeline drops, the large ring piece 21 and the small ring piece 22 retract, and the buffer gap 7 between the large ring piece 21 and the small ring piece 22 is restored again.
The baffle 3 is formed by splicing a plurality of arc-shaped sheet bodies, the plurality of sheet bodies are welded with each other, the outer annular wall of the baffle 3 is welded with the end part of the outer pipe body 1, and the inner annular wall of the baffle 3 is welded with the inner pipe body 2. With separation blade 3 split into a plurality of curved lamellar bodies, be convenient for on the one hand transport separation blade 3, on the other hand is convenient for weld separation blade 3 and outer body 1 and interior body 2. The end part of the outer pipe body 1 is welded with an annular flange 13, and the flange is convenient for connecting a pipeline with a fan.
The square gasket 8 is arranged on the fixing bolt 5, the gasket 8 is positioned between the inner pipe body 2 and the tightening nut 6, the gasket 8 increases the fixing effect of the tightening nut 6 on the inner pipe body 2, and the mounting stability of the inner pipe body 2 is improved.
The implementation principle of the embodiment is as follows: when the pipeline is used, because the temperature of gas in the pipeline is high, the inner pipe body 2 expands under the action of high temperature, the large ring piece 21 and the small ring piece 22 both deform, and in the deformation process, the buffer gap 7 reserved between the large ring piece 21 and the small ring piece 22 is used for buffering the deformation of the large ring piece 21 and the small ring piece 22; when the pipeline is not used, the temperature in the pipeline drops, the large ring piece 21 and the small ring piece 22 retract, and the buffer gap 7 between the large ring piece 21 and the small ring piece 22 is restored again.
The inner pipe body 2 is provided with the large ring piece 21 and the small ring piece 22 which are arranged on the fixing bolt 5, and the buffer gap 7 is reserved between the large ring piece 21 and the small ring piece 22, so that the buffer gap 7 has a buffer effect on the deformation of the large ring piece 21 and the small ring piece 22 in a high-temperature state, and the service life of the pipeline is prolonged; meanwhile, the heat insulation cotton layer 4 is arranged, so that the heat insulation effect on the pipeline is achieved, and the loss of heat in the gas is reduced.
Example 2:
referring to fig. 1 and 3, the present embodiment is different from embodiment 1 in that:
the overlapped part of the large ring plate 21 and the small ring plate 22 is provided with a high temperature resistant elastic plate 9, wherein the buffer gap 7 is filled with the high temperature resistant elastic plate 9, preferably, the high temperature resistant elastic plate 9 is selected from a high temperature mica composite plate.
The implementation principle of the embodiment is as follows: high temperature resistant elastic piece 9 can realize the expansion deformation that takes place between large ring piece 21 and the ringlet piece 22 on the one hand, and on the other hand can prevent that impurity in the gas from entering into the cotton layer 4 of heat preservation through buffering clearance 7, causes the corruption to the cotton layer 4 of heat preservation, has improved the life of pipeline.
Example 3:
referring to fig. 1 and 3, the present embodiment is different from embodiment 1 in that: an annular sliding groove 10 is formed in the inner side wall of the large ring piece 21 close to the small ring piece 22, and an inserting ring 11 which is matched with the sliding groove 10 in an inserting mode is integrally formed at one end, close to the large ring piece 21, of the small ring piece 22.
The implementation principle of the embodiment is as follows: when the inner pipe body 2 is subjected to expansion deformation, the insertion ring 11 slides in the sliding groove 10, and by means of the insertion fit of the insertion ring 11 and the sliding groove 10, on one hand, the expansion deformation between the large ring piece 21 and the small ring piece 22 can be realized, and on the other hand, impurities in gas can be reduced to enter the heat preservation cotton layer 4 through the buffer gap 7.
Example 4:
referring to fig. 1 and 5, the present embodiment is different from embodiment 1 in that:
the inner wall of the large ring piece 21 and the outer wall of the small ring piece 22 are integrally formed with a plurality of convex rings 12 at the side close to each other, the diameters of the convex rings 12 on the large ring piece 21 are sequentially reduced along the axis of the large ring piece 21 towards the end part direction of the large ring piece 21, and the diameters of the convex rings 12 on the small ring piece 22 are sequentially reduced along the axis of the small ring piece 22 towards the end part direction of the small ring piece 22.
The implementation principle of the embodiment is as follows: set up a plurality of bulge loops 12 on the inner wall of big ring 21 and the outer wall of ringlet 22, when interior body 2 is heated and takes place the inflation, big ring 21 and ringlet 22 all take place the inflation, in the inflation process, big ring 21 and the mutual overlap joint position department of ringlet 22 are close to each other, the mutual butt of in-process bulge loop 12 of being close to, the temperature is higher, the inflation is more violent, the less bulge loop 12 of diameter is owing to can not bear the stress that the deformation brought, the mutual extrusion dislocation of the less bulge loop 12 of diameter, make the great bulge loop 12 butt of diameter. The mutual butt of bulge loop 12 can adapt to the expansion deformation that interior body 2 took place, prevents that the dust in the steam from entering into the cotton layer 4 of heat preservation, has played certain guard action to the cotton layer 4 of heat preservation, simultaneously, when the temperature in interior body 2 still is not enough to make it take place to warp, because the effect of bulge loop 12, can play the effect that blocks to the dust in the steam.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. The utility model provides a high temperature gas recovery pipeline, includes outer body (1), body (2) in being equipped with in outer body (1) inside, be equipped with heat preservation cotton layer (4) between outer body (1) and interior body (2), the both ends of outer body (1) and interior body (2) are sealed through separation blade (3), its characterized in that: the inner pipe body (2) comprises a large ring piece (21) and a small ring piece (22), the diameter of the large ring piece (21) is larger than that of the small ring piece (22), the large ring piece (21) and the small ring piece (22) are sequentially arranged in an overlapping mode along the axis direction of the outer pipe body (1), a fixing bolt (5) is fixedly arranged on the inner wall of the outer pipe body (1), the fixing bolt (5) sequentially penetrates through the heat-insulating cotton layer (4) and the inner pipe body (2) and is fixed through screwing a nut (6), and a buffer gap (7) is reserved between the large ring piece (21) and the small ring piece (22) along the axis direction of the fixing bolt (5); one side that the inner wall of large ring piece (21) and the outer wall of ringlet piece (22) are close to each other is provided with a plurality of bulge loops (12), and the diameter of bulge loop (12) that is located on large ring piece (21) reduces along the axis of large ring piece (21) in proper order towards the tip direction of large ring piece (21), and the diameter of bulge loop (12) that is located on ringlet piece (22) reduces along the axis of ringlet piece (22) in proper order towards the tip direction of ringlet piece (22).
2. A high temperature gas recovery pipeline according to claim 1, wherein: the baffle plate (3) is formed by splicing a plurality of arc-shaped sheet bodies.
3. A high temperature gas recovery pipeline according to claim 1, wherein: and a gasket (8) is arranged on the fixing bolt (5), and the gasket (8) is positioned between the inner pipe body (2) and the tightening nut (6).
4. A high temperature gas recovery pipeline according to claim 1, wherein: the end part of the outer pipe body (1) is provided with a flange (13) used for being connected with a fan.
5. A high temperature gas recovery pipeline according to claim 1, wherein: the material of the heat insulation cotton layer (4) is a ceramic fiber cotton layer.
6. A high temperature gas recovery pipeline according to claim 1, wherein: the overlapped part of the large ring piece (21) and the small ring piece (22) is provided with a high-temperature resistant elastic piece (9), and the high-temperature resistant elastic piece (9) is filled with the buffer gap (7).
7. A high temperature gas recovery pipeline according to claim 1, wherein: the inner side wall of the large ring piece (21) close to the small ring piece (22) is provided with a sliding groove (10), and one end of the small ring piece (22) close to the large ring piece (21) is provided with an inserting ring (11) which is matched with the sliding groove (10) in an inserting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774653.0A CN111981250B (en) | 2020-09-12 | 2020-09-12 | High-temperature gas recovery pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774653.0A CN111981250B (en) | 2020-09-12 | 2020-09-12 | High-temperature gas recovery pipeline |
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| CN111981250A CN111981250A (en) | 2020-11-24 |
| CN111981250B true CN111981250B (en) | 2022-02-22 |
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| CN202010774653.0A Active CN111981250B (en) | 2020-09-12 | 2020-09-12 | High-temperature gas recovery pipeline |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115420069B (en) * | 2022-08-31 | 2023-06-13 | 重庆长征重工有限责任公司 | Solid-liquid separation equipment |
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| CN105822870A (en) * | 2015-01-04 | 2016-08-03 | 刘正彬 | Insulating pipe |
| CN204573441U (en) * | 2015-03-27 | 2015-08-19 | 沈阳鑫博工业技术股份有限公司 | Dual axis is to compensating type expansion joint |
| CN205173827U (en) * | 2015-12-07 | 2016-04-20 | 诸暨市蓝天非金属工艺研究所 | Nonmetal expansion joint |
| CN206973165U (en) * | 2017-06-26 | 2018-02-06 | 盐城科奥机械有限公司 | A kind of Dacroment production line interior plate |
| CN207422184U (en) * | 2017-10-13 | 2018-05-29 | 广州发展集团股份有限公司 | A kind of side guard plate device for boiler |
| CN207555973U (en) * | 2017-12-01 | 2018-06-29 | 浙江武义中茂工艺品制造有限公司 | The anti-dust of anticracking of hot-blast stove assembly line blocks pipeline |
| CN111237551A (en) * | 2020-01-19 | 2020-06-05 | 山东大城防腐保温安装工程有限公司 | Anticorrosive type insulating tube with spiral sheath |
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| CN111981250A (en) | 2020-11-24 |
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