CN215593498U - Insulation construction and dryer - Google Patents
Insulation construction and dryer Download PDFInfo
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- CN215593498U CN215593498U CN202121559318.5U CN202121559318U CN215593498U CN 215593498 U CN215593498 U CN 215593498U CN 202121559318 U CN202121559318 U CN 202121559318U CN 215593498 U CN215593498 U CN 215593498U
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Abstract
The utility model discloses a heat insulation structure, which comprises a drying cylinder end cover and a drying cylinder barrel, wherein an inner heat insulation layer for heat insulation is arranged on the inner side wall surface of the drying cylinder barrel close to the drying cylinder end cover, the inner heat insulation layer is of a hollow structure and is provided with an inner heat insulation layer opening, and the inner heat insulation layer opening is closed so as to enable the inner heat insulation layer and the inner side wall surface to form an annular closed cavity space; the outer side wall surface of the drying cylinder end cover is provided with an outer heat insulation layer for heat insulation, the outer heat insulation layer is of a hollow structure and is provided with an outer heat insulation layer opening, and the outer heat insulation layer opening is closed so that the outer heat insulation layer and the outer side wall surface form an annular closed cavity space. The heat insulation structure and the drying cylinder provided by the utility model have good heat insulation effect and stable structure.
Description
Technical Field
The utility model relates to the field of paper sheet drying equipment, in particular to a heat insulation structure and a drying cylinder with the same.
Background
In the papermaking field, in particular in the production of tissue paper, drying cylinders with internal steam or other high-temperature heat medium are commonly used for evaporative drying in the drying process. After the drying cylinder receives heat of an internal heat source, the temperature of the drying cylinder is extremely high, and the internal heat is easily transferred to the outside air through the end covers at the two ends to cause heat loss.
The existing drying cylinder is in an open bonding type for heat preservation, and a fiber or foam-shaped heat preservation material is directly adhered to the outer side of an end cover of the drying cylinder; or a thin plate is adopted to wrap fiber or foam-shaped heat insulation materials to form a fan shape, and the fan-shaped heat insulation materials are connected and fixed on the end cover of the drying cylinder by screws. However, this kind of heat preservation method cannot solve the problem of surface heat preservation of the drying cylinder barrel with two ends exposed outside the paper sheet. When the drying cylinder rotates at a high speed, the external air and the exposed surface form a very high speed difference, and the cylinder body causes strong convection of the air due to air disturbance, so that a large amount of heat of the drying cylinder is transferred to the external air.
The heat insulation structure of the existing drying cylinder end cover adopts a bonding or screw connection mode, the structure is unstable, the heat insulation structure is not completely isolated from the external atmosphere, and the air remained in the heat insulation material can still exchange and flow with the external atmosphere, so that the heat insulation efficiency is reduced.
In addition, the heat preservation of the cylindrical surface edge of the drying cylinder barrel, namely the heat preservation of the junction of the drying cylinder end cover and the drying cylinder barrel, is not considered in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to overcome the defects in the prior art, and provides a heat insulation structure with a good heat insulation effect.
Another object of the present invention is to overcome the drawbacks described in the prior art, and to provide a drying cylinder having the above-mentioned insulation structure, which ensures a stable insulation performance.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a heat insulation structure comprises a drying cylinder end cover and a drying cylinder barrel, wherein an inner heat insulation layer for heat insulation is arranged on the inner side wall surface of the drying cylinder barrel close to the drying cylinder end cover, the inner heat insulation layer is of a hollow structure and is provided with an inner heat insulation layer opening, and the inner heat insulation layer opening is closed so that the inner heat insulation layer and the inner side wall surface form an annular closed cavity space; the outer side wall surface of the drying cylinder end cover is provided with an outer heat insulation layer for heat insulation, the outer heat insulation layer is of a hollow structure and is provided with an outer heat insulation layer opening, and the outer heat insulation layer opening is closed so that the outer heat insulation layer and the outer side wall surface form an annular closed cavity space.
As an implementation mode, the inner heat-insulating layer is an annular inner heat-insulating ring cavity, and the inner heat-insulating ring cavity is welded and connected with the drying cylinder end cover and the inner side wall surface of the drying cylinder body by a cavity enclosing plate along the circumferential direction.
As an implementation manner, the outer insulating layer is welded to the outer side wall surface of the drying cylinder end cover, so that the annular closed cavity space formed by the outer insulating layer and the outer side wall surface is completely isolated from the outside air.
As a practical way, the opening of the inner insulating layer is provided with a check valve, so that the vacuum formed in the inner insulating layer maintains pressure.
As a practical way, the inner heat insulation layer is filled with heat insulation materials.
As an implementation manner, the outer heat-insulating layer is a plurality of outer heat-insulating rings which are adjacently arranged, and the adjacent outer heat-insulating rings are mutually communicated through short pipes.
As a practical way, a plurality of the outer heat preservation rings which are adjacently arranged have the same cross-sectional shape and are arranged on the same plane.
As a practical way, the opening of the outer insulating layer is provided with a check valve, so that the vacuum formed in the outer insulating layer maintains pressure.
As a practical way, the outer heat-insulating ring is filled with heat-insulating material.
A drying cylinder is provided with the heat preservation structure.
Compared with the prior art, the heat insulation structure and the drying cylinder with the same have the following beneficial effects:
according to the heat insulation structure provided by the utility model, the hollow inner heat insulation layer is arranged on the inner side wall surface of the drying cylinder body close to the drying cylinder end cover and/or the hollow outer heat insulation layer is arranged on the outer side wall surface of the drying cylinder end cover, the inner heat insulation layer and the outer heat insulation layer are both closed cavity spaces, so that the heat of the drying cylinder is effectively blocked from being transferred to the air outside the drying cylinder, the convection of the internal air is blocked, the good heat insulation effect is realized, the energy consumption can be reduced, and the economic benefit is improved.
Furthermore, the inner heat-insulating layer is welded and connected with the inner wall of the drying cylinder barrel body along the circumferential direction, namely a welding closed structure is adopted, the outer heat-insulating layer is welded to the outer side wall surface of the drying cylinder end cover, a stable structure is formed, the heat-insulating performance is enhanced, and the exchange of the internal air and the external air is effectively blocked.
The drying cylinder provided by the utility model has any one of the advantages of the heat insulation structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a drying cylinder provided in an embodiment of the present invention, wherein a heat preservation structure is shown;
fig. 2 is a schematic layout diagram of the outer thermal insulation ring and the short pipe according to the embodiment of the present invention.
Description of reference numerals:
1. end covers of the drying cylinder; 2. an inner insulating layer; 21. the inner insulating layer is provided with an opening; 3. an outer insulating layer; 31. the outer insulating layer is provided with an opening; 32. an outer heat-preserving ring; 4. a drying cylinder body; 5. a short pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
As shown in fig. 1, the present invention provides a heat-insulating structure, especially for heat insulation of two ends of a drying cylinder, which comprises a drying cylinder end cover 1 and a heat-insulating structure (i.e. an inner heat-insulating layer 2) at the edge of a drying cylinder barrel 4. The heat insulation structure can be used for a steel drying cylinder and comprises a drying cylinder end cover 1 and a drying cylinder barrel 4, wherein an inner heat insulation layer 2 is arranged at the edge of the inner cylindrical surface of the drying cylinder barrel 4, namely, the inner heat insulation layer 2 is fixedly connected to the inner side wall surface of the drying cylinder barrel 4 close to the drying cylinder end cover 1. Interior heat preservation 2 is hollow structure, and it has seted up at least one interior heat preservation opening 21, and interior heat preservation 2 communicates with the outside through interior heat preservation opening 21, that is to say, seals interior heat preservation opening 21 and can realize that the inside of interior heat preservation 2 forms the closed cavity space.
The inner heat-insulating layer 2 is a heat-insulating layer which is integrally in a circular ring shape, and can also be considered as a single heat-insulating ring cavity which is welded on the inner wall of the drying cylinder end cover 1, the circumference of the inner heat-insulating layer 2 is welded on the inner side wall surface (inner cylindrical surface) of the drying cylinder barrel body 4, namely, the inner heat-insulating ring cavity is welded and connected with the inner side wall surfaces of the drying cylinder end cover 1 and the drying cylinder barrel body 4 along the circumferential direction by a shielding plate surrounded by the cavity, so that a stable connecting structure is formed, and a welding closed structure is adopted. Preferably, an inner heat retaining ring is provided at the interface of the cylinder head cover 1 and the cylinder barrel 4.
As a technical scheme paralleling with the above-mentioned interior heat preservation 2, the outside wall of the dryer end cover 1 is fixedly connected with an exterior heat preservation 3, the exterior heat preservation 3 is also a hollow structure, and is provided with at least one exterior heat preservation opening 31, the exterior heat preservation 3 is communicated with the outside through the exterior heat preservation opening 31, namely the interior of the exterior heat preservation 3 can be formed into a closed cavity space by closing the exterior heat preservation opening 31.
Preferably, the outer insulation layer 3 is connected with the cylinder end cover 1 by means of welding connection, so as to form a stable connection structure, i.e. a welding closed structure. Specifically, the outer insulating layer 3 is welded to the outer side wall surface of the drying cylinder end cover 1, so that an annular closed cavity space formed inside the outer insulating layer 3 is completely isolated from the outside air.
Further, as shown in fig. 2, the outer insulation layer 3 is composed of a plurality of outer insulation rings 32, and the radii of the outer insulation rings 32 are gradually decreased and are adjacently arranged, so that the wall surfaces of the insulation structure are prevented from being exposed. The outer heat-insulating rings 32 are communicated with each other, and specifically, two adjacent outer heat-insulating rings 32 are drilled and installed with a short pipe 5, and the two adjacent outer heat-insulating rings 32 are communicated with each other through the short pipe 5.
It should be noted that the adjacent arrangement refers to the circumferential arrangement of the outer heat retaining ring 32 with the larger radius around the outer heat retaining ring 32 with the smaller radius. The radius refers to the distance of the outer heat retention ring 32 to the cylinder axis as shown in fig. 1.
Preferably, the outer rings 32 are in the same plane (i.e. the outer side wall surface of the cylinder end cover 1) and they have the same cross-sectional shape, further they are semicircular and have the same radius. As shown in fig. 1, which shows a cross-section of each adjacently disposed outer heat retaining ring 32, the outer ring 32 having the larger diameter is located at the outer ring. More intuitively, as shown in FIG. 2, the outer rings 32 are arranged adjacent to one another. It should be noted that the section radius refers to the radius of the cross section of each outer heat retaining ring 32.
Optionally, the inner insulating layer 2 is composed of a plurality of inner insulating rings (not shown in the figure), each having a gradually decreasing radius and being arranged adjacently, each inner insulating ring being interconnected, wherein the inner insulating rings are arranged in a manner similar to the outer insulating rings 32.
As a first heat preservation mode of the inner heat preservation layer, a vacuumizing mode is adopted. Specifically, the opening 21 of the inner heat-insulating layer is provided with a one-way valve, when air in the cavity of the inner heat-insulating ring is pumped out, the one-way valve can ensure that pressure maintaining can be realized after vacuumizing, and then the one-way valve is sealed by a threaded plug or a plug head.
As a second heat preservation mode of the inner heat preservation layer, a mode of filling heat insulation materials is adopted. Specifically, a heat insulating material is directly filled in a closed cavity space of the inner heat-insulating ring cavity to block the convection of the internal air so as to play a heat insulating role. The heat insulating material is a heat insulating material or a heat insulating material commonly used in the prior art, such as rigid polyurethane foam, mineral wool, rock wool, glass wool, and the like.
As a first heat preservation mode of the outer heat preservation layer, a vacuumizing mode is adopted. Specifically, the opening 31 of the outer insulating layer is provided with a check valve, and when the air in the outer insulating ring 32 is pumped out, the check valve can ensure that the pressure can be maintained after the vacuum pumping is carried out, and then the check valve is closed by a threaded plug or a plug head.
As a second heat preservation mode of the outer heat preservation layer, a mode of filling heat insulation materials is adopted. Specifically, the closed cavity space of the outer heat-insulating ring 32 is directly filled with a heat-insulating material to block convection of the internal air and perform a heat-insulating function.
The heat preservation mode of two kinds of above-mentioned interior heat preservation layers and the heat preservation mode of two kinds of outer heat preservation layers can make up, obtains four kinds of heat preservation modes of insulation construction, and for example one of them heat preservation mode of insulation construction is: the inner heat-insulating layer adopts a vacuumizing mode, and the outer heat-insulating layer 3 adopts a mode of filling heat-insulating materials.
Preferably, the outer heat retaining ring 32 is semi-circular in cross-section, as shown in FIG. 1.
As shown in figure 1, the utility model provides a drying cylinder, and the two ends of the drying cylinder are respectively provided with the heat preservation structures. Other parts of the drying cylinder are the same as or similar to the prior art and are not described in detail herein.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A heat insulation structure comprises a drying cylinder end cover (1) and a drying cylinder body (4), and is characterized in that,
an inner heat-insulating layer (2) for heat insulation is arranged on the inner side wall surface of the drying cylinder body (4) close to the drying cylinder end cover (1), the inner heat-insulating layer (2) is of a hollow structure and is provided with an inner heat-insulating layer opening (21), and the inner heat-insulating layer opening (21) is closed so that the inner heat-insulating layer (2) and the inner side wall surface form an annular closed cavity space;
the outer side wall surface of the drying cylinder end cover (1) is provided with an outer heat preservation layer (3) for heat preservation, the outer heat preservation layer (3) is of a hollow structure and is provided with an outer heat preservation layer opening (31), and the outer heat preservation layer opening (31) is sealed so that the outer heat preservation layer (3) and the outer side wall surface form an annular closed cavity space.
2. The heat insulation structure of claim 1, characterized in that the inner heat insulation layer (2) is an annular inner heat insulation ring cavity, and the inner heat insulation ring cavity is welded and connected with the drying cylinder end cover (1) and the inner side wall surface of the drying cylinder body (4) along the circumferential direction by a cavity enclosing plate.
3. Insulation construction according to claim 1, characterized in that the outer insulation layer (3) is welded to the outer side wall of the cylinder end cover (1) so that the annular closed cavity space formed by the outer insulation layer (3) and the outer side wall is completely isolated from the outside air.
4. Insulation construction according to claim 1, characterized in that the inner insulation layer opening (21) is fitted with a one-way valve, so that the vacuum formed in the inner insulation layer (2) is maintained.
5. Insulation construction according to claim 1, characterized in that the inner insulation layer (2) is filled with an insulating material.
6. Insulation construction according to claim 1, characterized in that the outer insulation (3) is a plurality of adjacently arranged outer insulation rings (32), adjacent outer insulation rings (32) being interconnected by short pipes (5).
7. Insulation construction according to claim 6, characterized in that a plurality of adjacently arranged outer insulation rings (32) have the same cross-sectional shape and are arranged in the same plane.
8. Insulation construction according to claim 6, characterized in that the outer insulation layer opening (31) is fitted with a one-way valve, so that the vacuum formed in the outer insulation ring (32) is maintained.
9. Insulation construction according to claim 6, characterized in that the outer insulation ring (32) is filled with an insulating material.
10. A drying cylinder, characterized in that it comprises a heat retention structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121559318.5U CN215593498U (en) | 2021-07-09 | 2021-07-09 | Insulation construction and dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121559318.5U CN215593498U (en) | 2021-07-09 | 2021-07-09 | Insulation construction and dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215593498U true CN215593498U (en) | 2022-01-21 |
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ID=79877856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121559318.5U Active CN215593498U (en) | 2021-07-09 | 2021-07-09 | Insulation construction and dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215593498U (en) |
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2021
- 2021-07-09 CN CN202121559318.5U patent/CN215593498U/en active Active
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