CN210486506U - Structure for preventing rubber ring from being burnt by hot air during blow-in - Google Patents
Structure for preventing rubber ring from being burnt by hot air during blow-in Download PDFInfo
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- CN210486506U CN210486506U CN201921487800.5U CN201921487800U CN210486506U CN 210486506 U CN210486506 U CN 210486506U CN 201921487800 U CN201921487800 U CN 201921487800U CN 210486506 U CN210486506 U CN 210486506U
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Abstract
The utility model discloses a structure for preventing a rubber ring from being burnt by hot gas when a furnace is opened, wherein a heat insulation retaining ring protruding out of a furnace mouth in the furnace mouth inlet and outlet direction is arranged around the furnace mouth; a positioning groove is arranged on the outer wall of the furnace body where the furnace opening is positioned, and the positioning groove surrounds the heat insulation retaining ring; correspondingly, the rubber ring is partially embedded into the positioning groove; the furnace door is provided with an annular groove opposite to the heat insulation check ring, when the furnace door closes the furnace opening, the part of the heat insulation check ring protruding out of the furnace opening is accommodated in the annular groove, and the furnace door is pressed against the rubber ring to form rubber ring sealing. The utility model discloses a structure that the rubber circle was burnt by steam when preventing blowing in can form effective protection to being used for the sealed rubber circle of fire door.
Description
Technical Field
The utility model relates to a matching structure between a furnace door and a furnace body, which is used for preventing an O-shaped ring which is used for sealing from being burnt by hot air when the furnace is opened.
Background
For example, various heating furnaces for heating, various furnaces for chemical or physical treatment, often have a certain working temperature, for example, an annealing furnace, the maximum working temperature of which can reach 960 ℃, and further, for example, a PECVD furnace, depending on the process object, the working temperature of which is from 200 ℃ to 1300 ℃, for a commonly used rubber seal, the working temperature of the heating furnace is much higher than that of the rubber seal, the working temperature of a conventional rubber seal is 120 ℃, and the maximum working temperature of the high-temperature silicone rubber is 200 ℃. With the development of technology, the operating temperature of rubber-based seals is difficult to exceed 360 ℃, and even so, is much lower than the operating temperature of, for example, annealing furnaces.
To accommodate high temperature applications, copper or silver gaskets may be used for seals, such as for annealing furnaces. It should be noted that, in various furnaces, for example, the gasket used as a seal is a consumable material, and the service life thereof is generally short, and it is necessary to replace the gasket frequently. Copper and silver gaskets are expensive and are additionally too expensive for applications such as furnaces.
Therefore, in more applications, the use of relatively inexpensive rubber seals is still increasing in the art. Obviously, the rubber sealing ring cannot meet the requirement of high-temperature application, so a specific structure between the furnace door and the furnace body is required to be set, and the influence of the high temperature in the furnace on the rubber sealing ring is reduced.
The furnace door is assembled at the furnace opening of the furnace body, the furnace door usually comprises a first part which is inserted into the furnace opening and a second part which is matched with the outer wall surface where the furnace door is positioned, the temperature of the first part is higher and is not suitable for arranging the rubber sealing ring, but the second part can have a certain distance with the furnace opening, the heat conduction effect is reduced, the temperature is relatively lower, and therefore the rubber sealing ring can be arranged at the second part.
However, in some doors, the opening time is relatively long, and the hot air emitted from the door first rises from the door and burns the portion of the rubber packing directly above the second portion. In other words, even if the rubber packing is disposed outside the furnace opening, it is still burned or directly fails at the time of opening the furnace.
Disclosure of Invention
In view of this, the utility model aims at providing a structure that O type circle was burnt by steam when preventing blowing in, this structure can effectively protect the rubber circle.
According to the embodiment of the utility model, a structure for preventing the rubber ring from being burnt by hot gas during blow-in is provided, and a heat insulation retaining ring protruding out of the furnace mouth in the furnace mouth inlet and outlet direction is arranged around the furnace mouth;
a positioning groove is arranged on the outer wall of the furnace body where the furnace opening is positioned, and the positioning groove surrounds the heat insulation retaining ring;
correspondingly, the rubber ring is partially embedded into the positioning groove;
the furnace door is provided with an annular groove opposite to the heat insulation check ring, when the furnace door closes the furnace opening, the part of the heat insulation check ring protruding out of the furnace opening is accommodated in the annular groove, and the furnace door is pressed against the rubber ring to form rubber ring sealing.
Above-mentioned structure that the rubber circle was burnt by steam when preventing blowing in, optionally, thermal-insulated retaining ring with the annular cooperates and forms labyrinth seal structure or cooperates with the annular and forms contact seal structure.
Optionally, the height of the part, protruding out of the furnace opening, of the heat insulation check ring is 2-3 times of the height of the part, exposed out of the positioning groove, of the rubber ring.
Optionally, the distance between the heat insulation check ring and the rubber ring is 0.8-1.5 times of the height of the heat insulation check ring protruding out of the furnace opening.
Optionally, a positioning counter bore is formed at the furnace opening;
correspondingly, the heat insulation check ring is in interference fit with the positioning counter bore.
Optionally, a fixed flange is formed at the furnace mouth, and the rubber ring and the heat insulation check ring are mounted on the fixed flange;
and a water jacket for cooling the rubber ring is arranged in the fixed flange.
Optionally, a water jacket for cooling the rubber ring is arranged on the oven door.
Optionally, a reflecting plate is arranged on one side of the furnace door facing the furnace opening to shield the radiant heat.
Optionally, a heat insulation plate is disposed outside the reflection plate.
Optionally, the heat insulation plate and the reflection plate are mounted on the oven door through a plurality of fixing columns, and spacers sleeved on the fixing columns are arranged between the heat insulation plate and the reflection plate and between the heat insulation plate and the inner surface of the oven door.
The utility model discloses an in the embodiment, set up a thermal-insulated retaining ring in fire door department, it encircles the fire door to the steam that gives out when blowing in the stove scatters from the port department of thermal-insulated retaining ring, and the rubber circle sets up around thermal-insulated retaining ring, and during the fire door is sealed, thermal-insulated retaining ring can shield the direct influence of heat to the rubber circle, then goes out the thermal current in the same direction as leading during blowing in the stove, and unlikely direct and rubber circle contact, thereby can effectually prevent the burn of rubber circle. Even if a small amount of hot air contacts the rubber ring, the total heat is relatively low, and the heat-induced damage to the rubber ring is greatly reduced.
Drawings
FIG. 1 is a schematic view illustrating a closed state of a furnace opening according to an embodiment.
Fig. 2 is an enlarged view of a portion a of fig. 1.
FIG. 3 is a partial structure diagram of the state of opening the furnace mouth.
In the figure: 1. the furnace comprises a furnace chamber, 2. a reflecting plate, 3. a heat insulation plate, 4. a spacer bush, 5. a fixed column, 6. a spacer bush, 7. a furnace body, 8. a fixed flange water jacket, 9. a heat insulation retainer ring, 10. a rubber ring, 11. a furnace door water jacket, 12. a fixed flange, 13. a furnace door and 14. a ring groove.
Detailed Description
The furnace gate has circle furnace gate, square furnace gate, rectangle furnace gate, and the adaptation is in circle furnace gate, square furnace gate and rectangle furnace gate, and no matter which kind of furnace gate, all can use the ring to inject its structure, like ring, rectangle ring etc..
Referring to the attached drawings 1-3, in the drawings, a sealing element used for sealing is a rubber ring 10 in the drawings, the rubber ring 10 can be a common rubber ring or a high-temperature rubber ring, and the shape of the rubber ring can be an O-shaped rubber ring adapted to a round furnace mouth, a square rubber ring adapted to a square furnace mouth and a rectangular rubber ring adapted to a rectangular furnace mouth. It will be appreciated that the furnace body 7 is typically provided with a lining for thermal insulation, the outer surface of the furnace body 7 is typically not at a high temperature, and in the embodiment of the present invention, the rubber ring 10 is provided on the outer wall surface of the side wall of the furnace body 7 where the furnace mouth is opened.
In the embodiment of the utility model, in order to prevent the rubber ring 10 from being burnt or directly burned out when the furnace is opened, the first measure is to arrange the heat insulation retaining ring 9 at the furnace mouth.
The heat insulation retainer ring 9 can be made of PEPE (Polypropylene Thermoplastic Elastomer, commonly called teflon), and further, can be made of quartz ring, asbestos ring, glass fiber ring, asbestos ring, or silicate ring.
For example, the crystallization furnace can be an alumina ceramic fiber ring, a zirconia fiber ring and the like with the working temperature of 800-1000 ℃.
The heat insulation retaining ring 9 is arranged around the furnace mouth, the main function of the heat insulation retaining ring is that when the furnace is opened, hot air flow rises based on convection action, and if the heat insulation retaining ring 9 is not used for shielding, the hot air can directly impact the rubber ring 10. In addition, since the hot gas at 800 ℃, for example, spreads relatively weakly outward during the rising due to strong thermal convection, the hot gas is blocked by the heat insulating collar 9 and rises rapidly at the outer port of the heat insulating collar 9, and the influence on the rubber ring 10 near the rising gas flow is small.
In addition, because the velocity of the rising air is relatively high, a venturi effect is generated, and ambient air is also entrained and rises due to thermal diffusion, which supplements relatively cool air.
Accordingly, the rising hot air should have a certain distance from the rubber ring 10, and for this reason, the thermal isolation collar 9 needs to protrude outward, i.e. the length of the furnace mouth is increased, so that the furnace mouth protrudes from the outer wall surface of the furnace body where the furnace mouth is opened, and the rubber ring 10 arranged on the outer wall surface of the furnace body is in a state of being covered by the thermal isolation collar 9.
Furthermore, a positioning groove such as a positioning groove with a rectangular cross section of the clamping rubber ring 10 in fig. 2 and 3 is formed on the outer wall of the furnace body where the furnace opening is located.
The positioning groove is a ring groove surrounding the furnace mouth and is ideally coaxial with, for example, a circular furnace mouth.
The locating slot can be rectangular section ring slot, also can be trapezoidal section ring slot.
Accordingly, the rubber ring 10 is positioned in the positioning groove, and generally, the rubber ring 10 is partially received or embedded in the positioning groove, and the portion of the rubber ring 10 exposed out of the positioning groove can be deformed by the extrusion of the oven door 13, so as to form an effective seal.
Furthermore, the furnace door 13 is provided with an annular groove 14 opposite to the heat insulation retaining ring 9, and when the furnace door 13 is in a state of closing the furnace opening, the part of the heat insulation retaining ring 9 protruding out of the furnace opening is accommodated in the annular groove 14; meanwhile, the oven door 13 presses the rubber ring 10 to form a rubber ring seal.
The heat insulating retainer ring 9 may be in direct contact with the groove bottom of the ring groove 14 to form a barrier seal, or may be provided with a gap to form a labyrinth seal.
Likewise, in a preferred embodiment, the thermal shield collar 9 may engage with one of the groove walls of the annular groove 14, either on the centrifugal or centripetal side.
If the matching precision is good, the heat insulation retainer ring 9 can be simultaneously jointed with the groove walls of the centrifugal side and the centripetal side of the ring groove 14. In this type of application, the thermal shield collar 9 is made of a relatively rigid material, such as a ceramic fiber ring. For relatively soft heat insulation materials, such as asbestos and rock wool, for example, asbestos rings and rock wool rings are prepared, on one hand, the precision is not high, on the other hand, the shape retention is poor, and the contact between the ring groove 14 and the ring groove can be in contact sealing with the groove bottom.
Therefore, there are two main types of structures for forming the seal between the thermal isolation collar 9 and the annular groove 14, one of which is a non-contact seal, i.e., a labyrinth seal structure, and the other is a contact seal structure, and the contact seal structure is based on the difference in material of the thermal isolation collar 9, and can be selected to be connected with the groove bottom of the annular groove 14 or connected with the groove wall.
It should be noted that although the temperature in the furnace for heat treatment is high and the rising speed of hot gas is high at the time of opening the furnace, a certain diffusion effect still occurs, and for this reason, the height of the heat insulating collar 9 protruding from the furnace opening is 2 to 3 times the height of the portion of the rubber ring 10 protruding from the positioning groove. In addition, the height of the heat insulation retaining ring 9 protruding out of the furnace opening is not suitable to be too large, otherwise the annular groove 14 is too deep, and the structural design of the furnace door 13 is affected.
Furthermore, the distance between the heat insulation check ring 9 and the rubber ring 10 is 0.8-1.5 times of the height of the heat insulation check ring 9 protruding out of the furnace mouth, so that a good shielding effect is formed.
In the configuration shown in fig. 3, the thermal barrier 9 is a jacket structure, and the inner end, i.e. the end facing the furnace chamber 1, has a flange, it should be noted that the flange may not be present, and the flange is mainly provided for improving the bonding capability with the furnace mouth, especially by using a relatively soft thermal barrier 9.
In a preferred embodiment, a positioning counter bore is formed at the furnace opening, the positioning counter bore is matched with the flange, and the flange is just accommodated in the positioning counter bore and forms interference fit with the positioning counter bore.
The interference fit is also called interference connection, and locking is realized based on friction force formed by the interference fit, so that stronger binding force can be formed.
In the structure shown in fig. 3, a fixed flange 12 is formed at the furnace opening, and a flange connection is adopted between the furnace door 13 and the fixed flange 12.
Correspondingly, the rubber ring 10 and the heat insulation retainer ring 9 are mounted on a fixing flange 12.
A water jacket for cooling the rubber ring 10, such as the fixed flange water jacket 8 shown in fig. 2 and 3, is arranged in the fixed flange 12.
In the embodiment of the present invention, although the rubber ring 10 is adapted to have a more complicated structure, the overall use cost of the rubber ring 10 is relatively low with respect to the seal ring as a consumable.
Generally, the sealing ring can only be used for a plurality of times or tens of times, so that the relatively complex structure is invested once, and the use cost is measured by replacing the sealing ring at a higher frequency. Be suitable for the utility model discloses embodiment that uses rubber circle 10 has better prospect.
Furthermore, the flange water jacket 8 is beneficial to further protect the rubber ring 10, thereby reducing the replacement times of the rubber ring 10. Meanwhile, because the flange water jacket 8 is arranged on the fixed flange 12, the furnace chamber 1 is provided with a heat insulation lining or a heat insulation layer, and the existence of the flange water jacket 8 can not increase the energy consumption too much.
Further, a water jacket for cooling the rubber ring 10, such as the furnace door water jacket 11 shown in fig. 2 and 3, is provided on the furnace door 13, and the furnace door water jacket 11 mainly protects the rubber ring 10 when the furnace opening is in a closed state.
In the structure shown in fig. 2 and 3, the side of the oven door 13 facing the oven opening is provided with the reflection plate 2 to shield the radiation heat, so that the influence of the heat radiation in the oven cavity 1 on the oven door 13 can be effectively reduced.
The reflecting plate 2 may be a quartz plate whose inner surface is plated with a silver film.
Furthermore, a thermal insulation plate 3 is arranged outside the reflection plate 2, and the thermal insulation plate 3 is a quartz thermal insulation plate.
The reflecting plate 2 is mainly used for reflecting radiant heat, but has a very limited insulating effect on heat conduction, and therefore, the reflecting plate 2 is also heated, and therefore, the heat insulating plate 3 and the reflecting plate 2 are mounted on the door 13 through a plurality of fixing posts 5, and spacers fitted around the fixing posts, such as the spacer 4 and the spacer 6 shown in fig. 2, are provided between the heat insulating plate 3 and the reflecting plate 2, and between the heat insulating plate 3 and the inner surface of the door 13, the spacer 6 is made of, for example, quartz, and the fixing posts 5 are also made of quartz.
Claims (10)
1. A structure for preventing a rubber ring from being burnt by hot gas during blow-in is characterized in that a heat insulation check ring protruding out of a furnace mouth in the furnace mouth inlet and outlet direction is arranged around the furnace mouth;
a positioning groove is arranged on the outer wall of the furnace body where the furnace opening is positioned, and the positioning groove surrounds the heat insulation retaining ring;
correspondingly, the rubber ring is partially embedded into the positioning groove;
the furnace door is provided with an annular groove opposite to the heat insulation check ring, when the furnace door closes the furnace opening, the part of the heat insulation check ring protruding out of the furnace opening is accommodated in the annular groove, and the furnace door is pressed against the rubber ring to form rubber ring sealing.
2. The structure for preventing the rubber ring from being burnt by hot gas during the blow-in of the furnace as claimed in claim 1, wherein the heat insulation retainer ring is matched with the ring groove to form a labyrinth seal structure or is matched with the ring groove to form a contact seal structure.
3. The structure for preventing the rubber ring from being burnt by hot gas during the blow-in of the furnace as claimed in claim 1 or 2, wherein the height of the part of the heat insulation retaining ring protruding out of the furnace opening is 2-3 times of the height of the part of the rubber ring exposing out of the positioning groove.
4. The structure for preventing the rubber ring from being burnt by hot gas during the blow-in of the furnace as claimed in claim 3, wherein the distance between the heat insulation retaining ring and the rubber ring is 0.8-1.5 times of the height of the heat insulation retaining ring protruding out of the furnace opening.
5. The structure for preventing the rubber ring from being burnt by hot gas during the blow-in of the furnace as claimed in claim 1 or 2, wherein a positioning counter bore is arranged at the furnace opening;
correspondingly, the heat insulation check ring is in interference fit with the positioning counter bore.
6. The structure for preventing the rubber ring from being burnt by hot gas during blow-in of the furnace as claimed in claim 1, wherein a fixed flange is formed at a furnace opening, and the rubber ring and the heat insulation check ring are installed on the fixed flange;
and a water jacket for cooling the rubber ring is arranged in the fixed flange.
7. The structure for preventing the rubber ring from being burnt by hot gas during the opening of the furnace as claimed in claim 1 or 6, wherein a water jacket for cooling the rubber ring is arranged on the furnace door.
8. The structure for preventing the rubber ring from being burnt by hot gas during the opening of the furnace as claimed in claim 1, wherein a reflecting plate is provided on a side of the furnace door facing the furnace opening to shield radiant heat.
9. The structure for preventing the rubber ring from being burnt by hot gas during the blow-in of the furnace as claimed in claim 8, wherein a heat insulating plate is provided on the outside of the reflecting plate.
10. The structure of claim 9, wherein the heat insulating plate and the reflecting plate are mounted on the door by a plurality of fixing posts, and spacers fitted around the fixing posts are provided between the heat insulating plate and the reflecting plate, and between the heat insulating plate and the inner surface of the door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487800.5U CN210486506U (en) | 2019-09-09 | 2019-09-09 | Structure for preventing rubber ring from being burnt by hot air during blow-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487800.5U CN210486506U (en) | 2019-09-09 | 2019-09-09 | Structure for preventing rubber ring from being burnt by hot air during blow-in |
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| CN210486506U true CN210486506U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921487800.5U Active CN210486506U (en) | 2019-09-09 | 2019-09-09 | Structure for preventing rubber ring from being burnt by hot air during blow-in |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344746A (en) * | 2020-11-23 | 2021-02-09 | 北京联合荣大工程材料股份有限公司 | Sandwich type coke oven door prefabricated part and preparation method thereof |
-
2019
- 2019-09-09 CN CN201921487800.5U patent/CN210486506U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344746A (en) * | 2020-11-23 | 2021-02-09 | 北京联合荣大工程材料股份有限公司 | Sandwich type coke oven door prefabricated part and preparation method thereof |
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Address after: 250119 area a, building 13, Sino German Industrial Park, 8 Zidong Avenue, Tianqiao District, Jinan City, Shandong Province Patentee after: Shandong Liguan microelectronics equipment Co., Ltd Address before: 250119 Shandong Province Flyover District of Ji'nan City Shun Hing Sangzi Town Road No. 66 Ji'nan new materials industry science and Technology Park Building 1, 1 floor West Patentee before: JINAN LIGUAN ELECTRONIC TECHNOLOGY Co.,Ltd. |