CN218410721U - Furnace door sealing structure for heat treatment furnace - Google Patents
Furnace door sealing structure for heat treatment furnace Download PDFInfo
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- CN218410721U CN218410721U CN202222283632.6U CN202222283632U CN218410721U CN 218410721 U CN218410721 U CN 218410721U CN 202222283632 U CN202222283632 U CN 202222283632U CN 218410721 U CN218410721 U CN 218410721U
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Abstract
The utility model relates to a box heat treatment furnace production field specifically provides a furnace gate seal structure for heat treatment furnace. The sealing structure comprises a wall body, a furnace door frame, a movable furnace door and a furnace door pressing mechanism, wherein the furnace door frame is fixed at a door opening of the wall body and consists of a furnace outer fixed sealing part, a movable sealing part, a horizontal part and a furnace inner fixing part; the movable furnace door is provided with an elastic sealing piece and a bulge extending to the inner side of the furnace, and the elastic sealing piece is abutted against the movable sealing part of the furnace door frame to form sealing fit; the furnace door pressing mechanism is arranged on the wall body and used for pushing the movable furnace door to enable the movable furnace door to be in sealing fit with the furnace door frame. Compared with the prior art, this real neotype furnace gate seal structure need not to set up water-cooling part, and is sealed effectual, and production and maintenance cost are low, have good popularization and application and worth.
Description
Technical Field
The utility model relates to a box heat treatment furnace production field specifically provides a furnace gate seal structure for heat treatment furnace.
Background
The box type heat treatment furnace has high sealing requirement because the furnace needs to maintain higher temperature, and the furnace door is a main part for energy dissipation because the furnace door needs to be opened frequently, so the sealing requirement between the furnace door and the front wall is high, the front wall and the furnace door structure can generate certain thermal deformation under the convection of high-temperature gas in the furnace and the heat absorption and conduction action of metal components, thereby causing the sealing failure and the heat dissipation loss of a furnace body, and in order to reduce or eliminate the thermal deformation and obtain better sealing and heat insulation effects, water cooling circulating pipelines are arranged on the front wall and the furnace door structure in the prior art, the contact temperature of the high-temperature gas in the furnace with the front wall and the furnace door sealing part is reduced, and the thermal deformation is prevented. However, the water cooling structure has certain hidden trouble, scaling and corrosion are easy to occur after long-term use to cause leakage, for example, the pipeline is difficult to maintain after leakage, or the whole water pipeline is frozen to cause abnormal use of equipment if blowing out is possible in the environment with lower temperature, and serious production safety accidents and serious quality problems of short circuit of electric elements and product scrapping can even occur due to water leakage under certain conditions.
Disclosure of Invention
The utility model provides a furnace door sealing structure used for a heat treatment furnace with good sealing effect aiming at the defects of the prior art.
The utility model provides a technical scheme that its technical problem adopted is: a furnace door sealing structure for a heat treatment furnace is characterized by comprising a wall body, a furnace door frame, a movable furnace door and a furnace door pressing mechanism,
the furnace door frame is fixed at a wall body door opening and comprises an external fixed sealing part, a movable sealing part, a horizontal part and an internal fixed part, wherein the external fixed sealing part, the movable sealing part, the horizontal part and the internal fixed part form a U-shaped door frame sleeved at the wall body door opening, one side of the movable sealing part is fixedly connected with the horizontal part (integrally designed or welded), and a heat insulation gasket is arranged between the other side of the movable sealing part and the external fixed sealing part and is in sealing fit through bolt pressing. The heat insulation gasket is made of high-temperature resistant materials such as aluminum silicate braided straps;
the movable furnace door is provided with an elastic sealing piece and a protruding part extending to the inner side of the furnace, and the elastic sealing piece is abutted against the movable sealing part of the furnace door frame to form sealing fit;
the furnace door pressing mechanism is arranged on the wall body and used for pushing the movable furnace door to enable the movable furnace door to be in sealing fit with the furnace door frame.
Preferably, a flow baffle is fixed on the periphery of the front end of the protruding part of the movable furnace door, and the flow baffle is made of aluminum silicate braided belts. When the movable furnace door is pressed with the furnace door frame, the outer side edge of the flow baffle is contacted with the inner wall of the horizontal part of the furnace door frame.
Preferably, the elastic sealing element comprises a prefabricated heat-preservation forming block, and the prefabricated heat-preservation forming block is arranged on the periphery of the protruding part of the movable furnace door; the movable sealing part of the furnace door frame is provided with a pressing bulge, and the pressing bulge is used for being abutted against the prefabricated heat-insulation forming block to form sealing fit.
Preferably, a high-temperature fiber cloth is fixed on the outer side of the prefabricated forming block.
Preferably, the sealing element comprises a sealing knife, the sealing knife is arranged at the open end of the peripheral side wall of the movable furnace door, and a sealing rope is arranged at the fixed sealing part outside the furnace of the furnace door frame and is used for abutting against the sealing knife to form sealing fit.
Preferably, the sealing element comprises a double-layer sealing knife, the double-layer sealing knife is arranged at the open end of the peripheral side wall of the movable furnace door, a double-layer sealing rope is arranged at the fixed sealing part outside the furnace of the furnace door frame, and the double-layer sealing rope is used for abutting against the double-layer sealing knife to form sealing fit.
Preferably, the thickness of the sealing rope or the double-layer sealing rope is smaller than that of the pressing bulge, and the thickness difference is 0.3-1.0cm.
Preferably, the bulge part of the movable furnace door is higher than the elastic sealing element by 4-5cm, and the distance between the side wall of the bulge part of the movable furnace door and the inner wall of the horizontal part of the furnace door frame is 2-4cm.
Compared with the prior art, the utility model discloses a furnace gate seal structure for heat treatment furnace has following outstanding beneficial effect:
the movable furnace door is provided with the convex part, so that the thickness of a heat-insulating layer of the furnace door can be increased, the temperature of the furnace door is reduced, the deformation is reduced, a 2-4cm gap is formed between the movable furnace door and the horizontal part of the furnace door frame, the convection velocity and the strength of high-temperature gas in the furnace at the position of the furnace door frame are greatly reduced, the heat transfer of the high-temperature gas to the furnace door frame and the furnace door is reduced, the temperature of the furnace door frame and the temperature of the furnace door are further reduced, and the influence of the high-temperature gas on a sealing structure is avoided;
and (II) the furnace door frame is sleeved at the door opening of the wall body to form a U-shaped door frame, a heat insulation gasket is arranged between the movable sealing part of the furnace door frame and the fixed sealing part outside the furnace, and the movable sealing part of the furnace door frame and the fixed sealing part outside the furnace are in a non-continuous structure through bolt pressing to form a bridge cut-off effect, so that the heat conduction of high-temperature gas to the front wall and the fixed sealing part outside the furnace through the furnace door frame can be greatly reduced, the sealing performance of the front wall is improved, and the temperatures of the front wall and the fixed sealing part outside the furnace are reduced.
Thirdly, a flow baffle is arranged at the front end of the convex part of the movable furnace door, and can further resist the overflow of high-temperature gas in the furnace.
Elastic sealing element on (four) furnace gate is including prefabricated heat preservation shaping piece, consequently, has stronger high temperature resistant elastic deformation performance, elastic sealing element can play inseparabler laminating, sealed effect with supporting of furnace door frame activity sealing portion setting protruding, can completely cut off the high temperature air current and outwards reveal, reduce furnace gate or front wall temperature, prevent that furnace gate or front wall from warping, and prefabricated heat preservation shaping piece outside is fixed with high temperature fiber cloth, the ability of resistance to wear of prefabricated heat preservation shaping piece has been improved, guarantee long-term sealed effect.
And (V) the elastic sealing piece on the furnace door is in sealing fit with the abutting bulge, so that the heat transfer of high-temperature air flow to the outer side sealing rope is effectively reduced, and the aging, hardening and sealing failure caused by high temperature are avoided.
The movable furnace door is provided with a bulge part which is matched with a horizontal part of a furnace door frame in an elastic sealing way, a pressing bulge is matched with an elastic sealing piece in an elastic sealing way, and a sealing rope and a sealing knife form two or three sealing ways to form a labyrinth type heat insulation and sealing structure.
Seventhly, a water cooling part is not needed, the investment of a pipe network and the investment of equipment are saved,
potential safety hazards and subsequent maintenance caused by cooling water are avoided.
Drawings
FIG. 1 is a schematic structural view of an oven door sealing structure for a heat treatment oven according to an embodiment;
FIG. 2 is a view of the seal configuration A of FIG. 1;
FIG. 3 is a cross-sectional view of the seal structure B-B of FIG. 1;
FIG. 4 is an enlarged view of the seal C of FIG. 3;
FIG. 5 is a schematic structural view of an oven door sealing structure of the three-purpose heat treatment oven according to the embodiment;
fig. 6 is a schematic view showing a press-fit state of the sealing structure of fig. 5.
The reference symbols in the drawings denote:
1. the device comprises a wall body, 2, a furnace door frame, 21, a fixed sealing part outside the furnace, 211, a double-layer sealing rope, 22, a movable sealing part, 221, a pressing bulge, 23, a horizontal part, 24, a fixed part inside the furnace, 25, a heat insulation gasket, 3, a movable furnace door, 31, a furnace door outer shell, 32, a furnace door pressing cotton plate, 33, a heat insulation layer, 34, a prefabricated forming block, 35, high-temperature fiber cloth, 36, a double-layer sealing knife, 37, a flow baffle plate, 4, a furnace door pressing mechanism, 5, a lifting link mechanism, 6 and a lifting driving mechanism.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" refer to the inner and outer relative to the profile of the components themselves.
The first embodiment is as follows:
as shown in fig. 1-4, the furnace door sealing structure for heat treatment furnace of the present embodiment is mainly composed of a wall 1, a furnace door frame 2, a movable furnace door 3 and a furnace door pressing mechanism 4.
The furnace door frame 2 is mainly composed of a furnace outer fixed sealing part 21, a movable sealing part 22, a horizontal part 23 and a furnace inner fixed part 24. The outer fixed sealing part 21, the movable sealing part 22, the horizontal part 23 and the inner fixed part 24 form a U-shaped door frame structure sleeved at the door opening of the wall body 1. Wherein: the movable sealing part 22, the horizontal part 23 and the furnace fixing part 24 are integrally designed, and a heat insulation gasket 25 is arranged between the movable sealing part 22 and the furnace outer fixing sealing part 21 and is in press fit through bolts to form sealing fit.
The movable sealing portion 22 is provided with a pressing protrusion 221. A double-layer sealing rope 211 is provided on the outer fixed sealing portion 21. The thickness of the pressing protrusion 221 is slightly larger than that of the sealing rope 212, and the thickness difference d3 is 0.5cm.
The movable furnace door 3 comprises a furnace door outer shell 31, a furnace door cotton pressing plate 32, an insulating layer 33 and a prefabricated forming block 34.
The insulating layer 33 is fixed to the inside of the door outer case 31 by a door pressing plate 32, and forms a convex portion which can extend to the inside of the horizontal portion 22 of the door frame. The distance d2 between the side wall of the protruding part and the inner wall of the horizontal part 22 of the oven door frame when the oven door is closed is 3.5cm.
The preformed block 34 is fixed on the periphery of the convex part of the movable furnace door 3 and can be abutted against the abutting convex part 221 of the furnace door frame 2 to form the sealing fit of an inner ring. The outer side of the prefabricated forming block 34 is wrapped with high-temperature fiber cloth 35. The prefabricated forming block 34 and the high-temperature fiber cloth 35 form an elastic sealing element, and the height difference d1 between the elastic sealing element and the movable furnace door bulge is 4cm.
The open end of the side wall of the oven door outer shell 31 is processed with a double-layer sealing knife 36. The double-layer sealing knife 36 can be abutted against the double-layer sealing rope 211 of the furnace door frame to form outside sealing fit.
The furnace door pressing mechanism 4 is fixed on the wall body 1 and used for pushing the movable furnace door 3 to be in sealing fit with the furnace door frame 2. The structure of the furnace door pressing mechanism 4 and the connection mode of the furnace door pressing mechanism 4, the wall body 1 and the movable furnace door 3 adopt the prior art.
In the sealing structure of the embodiment, the movable furnace door 3 can be lifted and lowered by the lifting link mechanism 5 and the lifting driving mechanism 6. The structures of the lifting link mechanism 5 and the lifting driving mechanism 6 and the connection modes of the lifting link mechanism, the wall body 1 and the movable furnace door 3 adopt the prior art.
Example II,
The furnace door sealing structure for the heat treatment furnace mainly comprises a wall body, a furnace door frame, a movable furnace door and a furnace door pressing mechanism. The structures of all parts are basically the same as those of the first embodiment, and the differences are as follows:
the fixed sealing part outside the furnace is provided with a single-layer sealing rope, and the open end of the side wall of the outer shell of the furnace door is provided with a single-layer sealing knife which is used for being matched with the single-layer sealing rope in a sealing way.
Example III,
The furnace door sealing structure for the heat treatment furnace mainly comprises a wall body, a furnace door frame, a movable furnace door and a furnace door pressing mechanism. The structure of each part is basically the same as that of the first embodiment, and the difference is that:
a flow baffle 37 is fixed on the front edge of the convex part of the movable furnace door 3. The flow baffle 37 is made of aluminum silicate woven belt, and when the movable furnace door 3 is pressed with the furnace door frame 2, the outer side edge of the flow baffle 37 contacts with the inner wall of the horizontal part 23 of the furnace door frame (as shown in figures 5 and 6).
The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A furnace door sealing structure for a heat treatment furnace is characterized by comprising a wall body, a furnace door frame, a movable furnace door and a furnace door pressing mechanism,
the furnace door frame is fixed at a wall body door opening and comprises an external fixed sealing part, a movable sealing part, a horizontal part and an internal fixed part, the external fixed sealing part, the movable sealing part, the horizontal part and the internal fixed part form a U-shaped door frame sleeved at the wall body door opening, wherein one side of the movable sealing part is fixedly connected with the horizontal part, and a heat insulation gasket is arranged between the other side of the movable sealing part and the external fixed sealing part and is in press fit with the external fixed sealing part through bolts to form sealing fit;
the movable furnace door is provided with an elastic sealing piece and a protruding part extending to the inner side of the furnace, and the elastic sealing piece is abutted against the movable sealing part of the furnace door frame to form sealing fit;
the furnace door pressing mechanism is arranged on the wall body and used for pushing the movable furnace door to enable the movable furnace door to be in sealing fit with the furnace door frame.
2. The furnace door sealing structure for a heat treatment furnace according to claim 1,
the periphery of the front end of the bulge of the movable furnace door is fixed with a flow baffle, and the outer edge of the flow baffle is contacted with the inner wall of the horizontal part of the furnace door frame.
3. The oven door sealing structure for a heat treatment oven according to claim 1 or 2, characterized in that,
the elastic sealing element comprises a prefabricated heat-insulation forming block which is arranged on the periphery of the protruding part of the movable furnace door;
the movable sealing part of the furnace door frame is provided with a pressing bulge which is used for abutting against the prefabricated heat-insulation forming block to form sealing fit.
4. The door sealing structure for the heat treatment furnace according to claim 3, wherein a high temperature fiber cloth is fixed to an outer side of the preform block.
5. The furnace door sealing structure for the heat treatment furnace according to claim 3, wherein a sealing knife is further provided on the movable furnace door, the sealing knife being provided at an open end of a peripheral side wall of the movable furnace door,
the fixed sealing part outside the furnace of the furnace door frame is provided with a sealing rope which is used for abutting against the sealing knife to form sealing fit.
6. The door sealing structure for heat treatment furnaces according to claim 5, wherein the sealing rope has a thickness smaller than that of the pressing projection by a difference of 0.3-1.0cm.
7. The door sealing structure for heat treatment furnaces according to claim 3, wherein the seal includes a double-layer sealing knife provided at an open end of a peripheral side wall of the movable furnace door,
the fixed sealing portion outside the stove of stove door frame is provided with double-deck sealed rope, and double-deck sealed rope is used for keeping in touch with double-deck sealed sword, forms sealed cooperation.
8. The door sealing structure for the heat treating furnace according to claim 7, wherein the double-layer sealing rope has a thickness smaller than that of the pressing projection by a difference of 0.3-1.0cm.
9. The door sealing structure for a heat treatment furnace according to claim 3, wherein the raised portion of the movable furnace door is higher than the elastic sealing member by 4-5cm, and a distance d2 between a side wall of the raised portion of the movable furnace door and an inner wall of the horizontal portion of the frame of the furnace door is 2-4cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222283632.6U CN218410721U (en) | 2022-08-30 | 2022-08-30 | Furnace door sealing structure for heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222283632.6U CN218410721U (en) | 2022-08-30 | 2022-08-30 | Furnace door sealing structure for heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218410721U true CN218410721U (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222283632.6U Active CN218410721U (en) | 2022-08-30 | 2022-08-30 | Furnace door sealing structure for heat treatment furnace |
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| CN (1) | CN218410721U (en) |
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2022
- 2022-08-30 CN CN202222283632.6U patent/CN218410721U/en active Active
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