CN112923737A - Cold quick-witted platform truck sealing device of spring adjustment formula ring - Google Patents
Cold quick-witted platform truck sealing device of spring adjustment formula ring Download PDFInfo
- Publication number
- CN112923737A CN112923737A CN202110206454.4A CN202110206454A CN112923737A CN 112923737 A CN112923737 A CN 112923737A CN 202110206454 A CN202110206454 A CN 202110206454A CN 112923737 A CN112923737 A CN 112923737A
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- sealing
- guide rail
- ring
- trolley
- plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0073—Seals
- F27D99/0076—Furnace car seals, i.e. seals used in continuous furnaces or kilns for preventing gas or heat exchange between heating chamber and the area comprising driving means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a spring adjusting type sealing device for a trolley of a ring cooling machine, which belongs to the technical field of metallurgy and comprises an external guide rail, an internal guide rail and a ring cooling trolley; the annular cooling trolley is erected between the outer guide rail and the inner guide rail, and sealing assemblies are arranged between the annular cooling trolley and the outer guide rail and between the annular cooling trolley and the inner guide rail respectively; the sealing assembly comprises a sealing vertical plate and a sealing ring which are fixedly connected with the ring cooling trolley; an upper sealing bottom plate and a lower sealing bottom plate are arranged on one side of the sealing vertical plate, which is far away from the ring cooling trolley; the opposite inner sides of the sealing bottom plate are respectively connected with a sealing adjusting plate through return springs; the sealing ring is arranged between the two sealing adjusting plates in a sliding manner; the sealing rings are connected with the inner guide rail and the outer guide rail respectively. The ring cooling trolley is supported and guided by the outer guide rail and the inner guide rail together, and the sealing bottom plate and the sealing adjusting plate are supported by the reset spring, so that the sealing adjusting plate and the sealing ring are always in a close-fitting state, and a good sealing effect is ensured; the practicality is good, can guarantee the cooling quality and the waste heat recovery effect of sintering hot mine.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a spring adjusting type sealing device for a trolley of a ring cooling machine.
Background
The circular cooler is a short for circular cooler and has the functions of timely cooling the hot sintered ore unloaded from the sintering machine, preventing overburning, recycling the heat of the hot sintered ore and effectively avoiding heat waste. The principle of the circular cooler is that cooling air is blown upwards from the bottom of the circular cooler, the cooling air is heated into hot air through hot sintering ores on the circular cooler, and the hot sintering ores are pumped out through a channel on the upper side of the circular cooler to recycle heat, so that the hot sintering ores can be timely cooled, and overburning is prevented.
In order to reduce the air flow at the bottom of the trolley from escaping from the periphery and reduce the air leakage rate, the sealing device at the bottom of the trolley is required to seal. In the actual production of today, the wear can appear in platform truck sealing device in the use, and the platform truck gyro wheel can produce the indentation of unevenness from top to bottom with inside and outside guide rail, can influence sealing device's leakproofness, leads to the air leakage big, seriously influences the cooling quality and the waste heat recovery of sintering hot mine.
Disclosure of Invention
The invention provides a spring-regulated sealing device for a ring cooling machine trolley, which aims to solve the problems that in the use process of the existing sealing device for the trolley, the trolley rollers and inner and outer guide rails are abraded, uneven indentations are generated up and down, the sealing performance of the sealing device is affected, the air leakage is large, and the cooling quality and waste heat recovery of sintering hot ores are seriously affected.
The invention is realized by the following technical scheme.
A spring adjusting type sealing device for a trolley of a ring cooling machine comprises an outer guide rail, an inner guide rail and a ring cooling trolley; the annular cooling trolley is erected between the outer guide rail and the inner guide rail, and sealing assemblies are respectively arranged between the annular cooling trolley and the outer guide rail as well as between the annular cooling trolley and the inner guide rail; the sealing assembly comprises a sealing vertical plate and an annular sealing ring which are fixedly connected with the ring cooling trolley; an upper sealing bottom plate and a lower sealing bottom plate are arranged on one side of the sealing vertical plate, which is far away from the ring cooling trolley; the opposite inner sides of the sealing bottom plates are respectively connected with a sealing adjusting plate through return springs; the sealing ring is arranged between the two sealing adjusting plates in a clinging and sliding manner; the sealing rings are respectively connected with the inner guide rail and the outer guide rail.
The invention is further improved in that a turnover plate which is turned over relatively is arranged on one side of the sealing bottom plate, which is far away from the sealing vertical plate; the turnover plate is provided with a sealing groove, the sealing adjusting plate is provided with a sealing plugboard, and the sealing plugboard is slidably inserted into the sealing groove.
The invention is further improved in that the sealing adjusting plate and the sealing bottom plate are respectively provided with a spring sleeve for limiting the return spring.
The invention further improves that the radian of the sealing adjusting plate is consistent with that of the sealing ring on the corresponding side.
In a further development of the invention, the sealing ring is rectangular in cross-section.
The invention is further improved in that the sealing ring and the sealing adjusting plate are both made of steel materials, and the contact surfaces of the sealing ring and the sealing adjusting plate are both smooth polished surfaces.
The invention is further improved in that both sides of the ring cooling trolley are provided with rollers, and one side of each roller, which is close to the ring cooling trolley, is provided with an annular guard plate; the guard plate is arranged close to the inner side face of the outer guide rail and the outer side face of the inner guide rail.
In a further improvement of the present invention, the ring cooling trolley has an arc-shaped structure matching the curvature of the inner and outer guide rails.
According to the technical scheme, the invention has the beneficial effects that: 1. the ring cooling trolley is supported and guided by the external guide rail and the internal guide rail together and driven by the power mechanism to perform circular motion, the hot sinter on the ring cooling trolley is cooled by cooling air blown in from the bottom, the hot sinter is cooled in time, and hot air after heating is extracted through the upper side channel to recycle heat. When cooling air blows upwards from the bottom of the annular cooling trolley, a good sealing effect is achieved through the sealing assembly; after the ring cooling trolley is used for a long time, the ring cooling trolley possibly bumps up and down on the outer guide rail and the inner guide rail, and the sealing bottom plate and the sealing adjusting plate are supported by the reset spring, so that the sealing adjusting plate and the sealing ring are always in a close-fitting state, and a good sealing effect is ensured; the structure is simple, the realization is easy, the practicability is good, and the cooling quality and the waste heat recovery effect of the sintering hot ore can be ensured. 2. The accuracy of the sealing adjusting plate moving up and down against the elastic force of the return spring is guaranteed, and the reliable sealing effect is guaranteed. 3. The return spring is limited and guided through the spring sleeve, so that the telescopic stability and accuracy of the return spring are ensured; the reset springs are uniformly arranged in a plurality of intervals along the length direction of the sealing bottom plate, so that the stability of providing elasticity is guaranteed. 4. The larger contact area between the sealing adjusting plate and the sealing ring is ensured, and the sealing performance is improved. 5. Simple structure, it is convenient to install, easily realizes, structural strength is good, and sealing performance is good. 6. The good sealing performance of the sealing ring and the sealing adjusting plate is ensured, the sealing ring and the sealing adjusting plate can have smaller sliding friction coefficient, and the relative friction force is reduced. 7. Arrange in through the gyro wheel the upper surface of outside guide rail and inside guide rail to it is spacing through backplate and outside guide rail medial surface and inside guide rail lateral surface contact, guarantee the accuracy nature of ring cold platform truck operation, avoid the phenomenon that the cold platform truck operation in-process of ring takes place the skew because the influence of centripetal force. 8. The good structural bearing performance is ensured, and the device can be well adapted to the annular space between the outer guide rail and the inner guide rail; when the ring runs, the bearing capacity of the sintered hot ore can be better.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic view of a ring cooling trolley and seal assembly mounting structure according to an embodiment of the present invention.
Fig. 3 is a schematic view of an installation structure of a sealing vertical plate, a sealing bottom plate and a sealing adjustment plate according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure of fig. 3.
In the drawings: 1. the outer guide rail, 2, inside guide rail, 3, cold platform truck of ring, 31, gyro wheel, 32, backplate, 4, sealing ring, 5, sealed riser, 6, sealed regulating plate, 7, sealing bottom plate, 8, reset spring, 9, seal groove, 10, sealed picture peg, 11, the folded sheet, 12, the spring sleeve.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.
As shown in the attached drawings, the spring adjusting type sealing device for the trolley of the ring cooling machine comprises an outer guide rail 1, an inner guide rail 2 and a ring cooling trolley 3 which are concentric in an annular mode, wherein the outer guide rail 1 and the inner guide rail 2 are horizontally arranged; the ring cooling trolley 3 is erected between the outer guide rail 1 and the inner guide rail 2 and is driven by a power mechanism (a motor), and sealing assemblies are respectively arranged between the ring cooling trolley 3 and the outer guide rail 1 and between the ring cooling trolley 3 and the inner guide rail 2; the sealing assembly comprises a sealing vertical plate 5 fixedly connected with the ring cooling trolley 3 and annular sealing rings 4 respectively and fixedly connected to the outer side surface of the inner guide rail 2 and the inner side surface of the outer guide rail 1; an upper horizontal sealing bottom plate 7 and a lower horizontal sealing bottom plate 7 are arranged on one side of the sealing vertical plate 5, which is far away from the ring cooling trolley 3; the opposite inner sides of the sealing bottom plates 7 are respectively connected with a sealing adjusting plate 6 through return springs 8; the sealing ring 4 is closely and slidably arranged between the two sealing adjusting plates 6.
The ring cooling trolley 3 is supported and guided by the external guide rail 1 and the internal guide rail 2 together and driven by the power mechanism to perform circular motion, the hot sinter on the ring cooling trolley 3 is cooled by cooling air blown in from the bottom, the hot sinter is cooled in time, and hot air after being heated is extracted through the upper side channel to recycle heat. When cooling air blows upwards from the bottom of the annular cooling trolley 3, a good sealing effect is achieved through the sealing assembly; after long-time use, the ring cooling trolleys 3 may bump up and down on the outer guide rail 1 and the inner guide rail 2, the sealing bottom plate 7 and the sealing adjusting plate 6 are supported by the return spring 8, the sealing adjusting plate 6 and the upper surface and the lower surface of the sealing ring 4 are always in a contact state, a closed space is formed between the bottom of each ring cooling trolley 3 and the inner guide rail and between the bottom of each ring cooling trolley 3 and the inner guide rail, cooling air is blown out from the upper part of the ring cooling trolleys 3 and is not diffused from the side surfaces of the ring cooling trolleys 3, and good sealing effect is guaranteed; the structure is simple, the realization is easy, the practicability is good, and the cooling quality and the waste heat recovery effect of the sintering hot ore can be ensured.
A turnover plate 11 which is turned over relatively is arranged on one side, away from the sealing vertical plate 5, of the sealing bottom plate 7 (the sealing vertical plate 5 on the upper side is provided with the turnover plate 11 which is turned over downwards, and the sealing vertical plate 5 on the lower side is provided with the turnover plate 11 which is turned over upwards); the folding plate 11 is provided with a sealing groove 9 with a relative opening, the sealing adjusting plate 6 is provided with a sealing inserting plate 10, and the sealing inserting plate 10 is slidably inserted into the sealing groove 9 and is limited by the sliding guide of the sealing groove 9. The accuracy of the up-and-down movement of the sealing adjusting plate 6 against the elastic force of the return spring 8 is ensured, and the reliable sealing effect is ensured.
And the seal adjusting plate 6 and the seal bottom plate 7 are both provided with spring sleeves 12 for limiting the return springs 8. The spring sleeve 12 is sleeved outside two ends of the reset spring 8, and the reset spring 8 is limited and guided through the spring sleeve 12, so that the telescopic stability and accuracy of the reset spring 8 are ensured; the reset springs 8 are uniformly arranged in a plurality of intervals along the length direction of the sealing bottom plate 7, so that the stability of elasticity is guaranteed.
The radian of the seal adjusting plate 6 is consistent with that of the seal ring 4 on the corresponding side. The larger contact area between the seal adjusting plate 6 and the seal ring 4 is ensured, and the sealing performance is improved. Preferably, the sealing vertical plate 5, the sealing adjusting plate 6, the sealing bottom plate 7 and the external guide rail 1 of the sealing assembly are all arc-shaped structures, and the shapes of the sealing vertical plate, the sealing adjusting plate, the sealing bottom plate and the external guide rail are matched with those of the sealing ring 4. The reset springs 8 are also distributed in an arc array.
The cross section of the sealing ring 4 is rectangular, one side of the sealing ring close to the sealing vertical plate 5 is an arc-shaped surface matched with the sealing vertical plate 5, and a sealing gap is reserved between the sealing ring and the sealing vertical plate. Simple structure, it is convenient to install, and it is easy to make, and sealing ring 4 structural strength is good, can guarantee better sealing performance.
The sealing ring 4 and the sealing adjusting plate 6 are both made of steel materials, and the contact surfaces of the sealing ring and the sealing adjusting plate are smooth polished surfaces. The sealing ring 4 and the sealing adjusting plate 6 can be ensured to have good sealing performance, and can also be ensured to have smaller sliding friction coefficient, the relative friction force is reduced, and the stable operation of the ring cooling trolley 3 is ensured.
The two sides of the ring cooling trolley 3 are both provided with rollers 31, one side of each roller 31, which is close to the ring cooling trolley 3, is provided with an annular guard plate 32, and the diameter of each guard plate 32 is larger than that of each roller 31; the guard plate 32 is closely attached to the inner side surface of the outer rail 1 and the outer side surface of the inner rail 2. Arrange in through gyro wheel 31 the upper surface of outside guide rail 1 and inside guide rail 2 to it is spacing through backplate 32 and the contact of 1 medial surface of outside guide rail and 2 lateral surfaces of inside guide rail, guarantee the accuracy nature and the stability of the cold platform truck 3 operation of ring, avoid the cold platform truck 3 operation in-process of ring skew phenomenon because centripetal force influences and take place.
The annular cooling trolley 3 is of an arc structure matched with the bending radians of the inner guide rail 2 and the outer guide rail 1. The good structural bearing performance is ensured, the annular space between the outer guide rail 1 and the inner guide rail 2 can be well adapted, and the structural design is reasonable; when the ring cooling trolley 3 runs in a ring shape, the bearing capacity of the sintered hot ore is better.
This cold quick-witted platform truck sealing device of spring regulation formula ring, simple structure easily realizes, and the practicality is good, and cold platform truck of ring supports, leads through outside guide rail and inside guide rail jointly to through power unit drive, be circular motion, the cooling air that blows in through the bottom cools off the hot sintering deposit on the cold platform truck of ring, in time cools down the hot sintering deposit, and takes out the steam after the heating through upside passageway, carries out heat recovery and recycles. When cooling air blows upwards from the bottom of the annular cooling trolley, a good sealing effect is achieved through the sealing assembly; after the ring cooling trolley is used for a long time, the ring cooling trolley possibly bumps up and down on the outer guide rail and the inner guide rail, the sealing bottom plate and the sealing adjusting plate are supported by the return spring, so that the sealing adjusting plate is always in a contact state with the upper surface and the lower surface of the sealing ring, a closed space is formed between the bottom of each ring cooling trolley and the inner guide rail and between the bottom of each ring cooling trolley and the inner guide rail, cooling air is blown out from the upper part of the ring cooling trolley, and is not diffused from the side surface of the ring cooling trolley, and a good sealing effect; the structure is simple, the realization is easy, the practicability is good, and the cooling quality and the waste heat recovery effect of the sintering hot ore can be ensured.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings are used for distinguishing relative positions if any, and are not necessarily given qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A spring adjusting type sealing device for a trolley of a ring cooling machine is characterized by comprising an external guide rail (1), an internal guide rail (2) and a ring cooling trolley (3); the annular cooling trolley (3) is erected between the outer guide rail (1) and the inner guide rail (2), and sealing assemblies are respectively arranged between the annular cooling trolley and the outer guide rail (1) and between the annular cooling trolley and the inner guide rail (2); the sealing assembly comprises a sealing vertical plate (5) and an annular sealing ring (4), wherein the sealing vertical plate is fixedly connected with the ring cooling trolley (3); an upper sealing bottom plate and a lower sealing bottom plate (7) are arranged on one side of the sealing vertical plate (5) far away from the ring cooling trolley (3); the opposite inner sides of the sealing bottom plate (7) are respectively connected with a sealing adjusting plate (6) through a return spring (8); the sealing ring (4) is arranged between the two sealing adjusting plates (6) in a clinging and sliding manner; and the sealing ring (4) is respectively connected with the inner guide rail (2) and the outer guide rail (1).
2. The spring-regulated ring cooler trolley sealing device according to claim 1, wherein a relatively turned-over plate (11) is arranged on one side of the sealing bottom plate (7) away from the sealing vertical plate (5); the folding plate (11) is provided with a sealing groove (9), the sealing adjusting plate (6) is provided with a sealing inserting plate (10), and the sealing inserting plate (10) is slidably inserted into the sealing groove (9).
3. The spring-regulated ring cooler trolley sealing device according to claim 1, wherein the seal regulation plate (6) and the seal bottom plate (7) are both provided with spring sleeves (12) for limiting the return springs (8).
4. The spring regulated ring cooler trolley seal according to claim 1, wherein the seal regulation plate (6) is arc-shaped to conform to the corresponding side seal ring (4).
5. The spring regulated ring cooler trolley seal according to claim 1, wherein said seal ring (4) is rectangular in cross section.
6. The spring-regulated ring cooler trolley sealing device according to claim 1, wherein the sealing ring (4) and the seal regulating plate (6) are both made of steel, and the contact surfaces of the sealing ring and the seal regulating plate are both smooth polished surfaces.
7. The spring-regulated ring cooler trolley sealing device according to claim 1, wherein rollers (31) are arranged on both sides of the ring cooler trolley (3), and an annular guard plate (32) is arranged on one side of each roller (31) close to the ring cooler trolley (3); the guard plates (32) are respectively tightly attached to the inner side surface of the outer guide rail (1) and the outer side surface of the inner guide rail (2).
8. The spring-regulated ring cooler trolley sealing device according to claim 1, wherein the ring cooler trolley (3) is of an arc-shaped structure matching the curvature of the inner guide rail (2) and the outer guide rail (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110206454.4A CN112923737B (en) | 2021-02-24 | 2021-02-24 | Cold quick-witted platform truck sealing device of spring adjustment formula ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110206454.4A CN112923737B (en) | 2021-02-24 | 2021-02-24 | Cold quick-witted platform truck sealing device of spring adjustment formula ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112923737A true CN112923737A (en) | 2021-06-08 |
| CN112923737B CN112923737B (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110206454.4A Active CN112923737B (en) | 2021-02-24 | 2021-02-24 | Cold quick-witted platform truck sealing device of spring adjustment formula ring |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4334435A (en) * | 1979-08-25 | 1982-06-15 | The Perkin-Elmer Corporation | Sealing apparatus |
| CN203615745U (en) * | 2013-11-01 | 2014-05-28 | 西安越达环保科技有限公司 | Novel trolley and sintering or cooling equipment |
| CN204478840U (en) * | 2015-01-06 | 2015-07-15 | 北京金都泰拓冶金技术研究有限公司 | A kind of central cooler slide track sealing device |
| CN206084023U (en) * | 2016-08-29 | 2017-04-12 | 成都君华睿道科技有限公司 | Boring burring cutter of efficient, fast industry |
-
2021
- 2021-02-24 CN CN202110206454.4A patent/CN112923737B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4334435A (en) * | 1979-08-25 | 1982-06-15 | The Perkin-Elmer Corporation | Sealing apparatus |
| CN203615745U (en) * | 2013-11-01 | 2014-05-28 | 西安越达环保科技有限公司 | Novel trolley and sintering or cooling equipment |
| CN204478840U (en) * | 2015-01-06 | 2015-07-15 | 北京金都泰拓冶金技术研究有限公司 | A kind of central cooler slide track sealing device |
| CN206084023U (en) * | 2016-08-29 | 2017-04-12 | 成都君华睿道科技有限公司 | Boring burring cutter of efficient, fast industry |
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| Publication number | Publication date |
|---|---|
| CN112923737B (en) | 2022-10-28 |
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