CN216007560U - Sleeve and waterproof structure for passive building outlet exhaust pipe - Google Patents
Sleeve and waterproof structure for passive building outlet exhaust pipe Download PDFInfo
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- CN216007560U CN216007560U CN202121811926.0U CN202121811926U CN216007560U CN 216007560 U CN216007560 U CN 216007560U CN 202121811926 U CN202121811926 U CN 202121811926U CN 216007560 U CN216007560 U CN 216007560U
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Abstract
The utility model discloses a sleeve and a waterproof structure for a passive building roof exhaust pipe. The technical scheme solves the problem that the chamfer cannot form continuous and fixed difficulties between the sleeve and the heat-insulation plate, reduces the risk of water leakage at the position, and improves the construction speed and the waterproof effect.
Description
Technical Field
The utility model belongs to the technical field of water prevention, and particularly relates to a sleeve for a passive building roof exhaust pipe and a water-proof structure.
Background
The passive building can save energy and reduce the emission of greenhouse gases, the huge energy-saving effect is realized by using special energy-saving building components and a high-quality ventilation system, and the comfort level is also greatly improved.
The roof waterproof heat insulation system of the passive building is equivalent to a cap of the passive building and plays a decisive role in achieving constant temperature and constant humidity. According to the requirement of passive ultra-low energy consumption, wet operation is not allowed between the roof waterproof heat preservation layer and the steam barrier layer, all construction needs dry operation, so the large-surface waterproof coiled material is constructed by the self-adhesive coiled material, and leakage often occurs at detailed nodes and lap joint positions, which is also a treatment difficulty of leakage.
At present, the waterproof and heat-insulating structure at the position of a roof exhaust pipeline is characterized in that a steam-isolating coiled material is paved at the root part of the pipeline, a PVC sleeve is sleeved on the outer side of the waterproof and heat-insulating structure, a heat-insulating material is filled between the sleeve and an exhaust pipe, and the outer side of the waterproof and heat-insulating structure is constructed and wrapped by a self-adhesive waterproof coiled material and a hot-melt coiled material in a combined manner. Because the passive building roofing exhaust casing is vertical riser, and the roofing requires the operation of not wetting between waterproof layer, heat preservation, the steam barrier, consequently can't carry out cement mortar chamfer processing in heat preservation board and bushing junction, so adopt insulation board cutting to do the chamfer so that the turn transition of self-adhesion waterproofing membrane and hot melt coiled material, nevertheless because the sleeve pipe is the pipe, can't guarantee the continuity of chamfer structure and pipe wall, consequently the stress concentration and the easy not hard up at here, cause the self-adhesion waterproofing membrane to appear the fracture at the sleeve pipe root easily, appear pasting insecure, scurry phenomenons such as water.
Therefore, the sleeve and the waterproof structure for the exhaust pipe of the roof of the passive building are expected to be developed, the problem that the chamfer cannot be continuous and difficult to fix between the sleeve and the heat-insulation plate is solved, the risk of water leakage at the position is reduced, the construction speed is increased, and the waterproof effect is ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sleeve and a waterproof structure for a passive building roof exhaust pipe, which solve the problems that a chamfer cannot be formed continuously and is difficult to fix between the sleeve and a heat-insulation plate, reduce the risk of water leakage at the part, improve the construction speed and ensure the waterproof effect.
In order to achieve the purpose, the utility model provides a sleeve for a passive building roof exhaust pipe, which comprises a barrel and wing plates, wherein the wing plates are arranged on the outer wall of the barrel along the circumferential direction of the barrel, and a chamfer angle is arranged between the top surfaces of the wing plates and the outer wall of the barrel.
Optionally, the exhaust pipe comprises a cover plate, the cover plate is used for sealing the top end of the cylinder body, a through hole is formed in the cover plate, and the cover plate is sleeved on the exhaust pipe through the through hole.
Optionally, the end face of the top end of the cylinder body inclines from the outer edge of the top end of the cylinder body to the radial inner side of the cylinder body, and the side face of the cover plate inclines from the top edge of the cover plate to the radial inner side of the cover plate;
when the apron set up in when the top of barrel, the terminal surface on barrel top with the side laminating of apron, just the top surface of apron with the top parallel and level of barrel.
Optionally, the wing plate and the barrel are integrally formed.
The utility model also provides a waterproof structure of the passive building roof exhaust pipe, which comprises:
the first coiled material layer is laid on the roof of the passive building and is turned upwards to the side wall of the exhaust pipe;
the sleeve is sleeved on the exhaust pipe, the bottom end of the sleeve is connected to the first coil layer on the roof of the passive building, and an annular space between the sleeve and the exhaust pipe is filled with a heat insulation material;
the insulation board is laid on the first coil layer, inserted below the wing plate of the sleeve and connected to the outer wall of the sleeve, and the bottom surface of the wing plate is connected to the top surface of the insulation board;
the additional waterproof layer extends to the top surface of the heat-insulation plate from the outer wall of the sleeve through the top surface of the wing plate;
and the third coil layer extends to the top surface of the warm plate from the outer wall of the exhaust pipe through the top of the sleeve, the outer wall of the sleeve and the additional waterproof layer.
Optionally, the sleeve pipe further comprises a cover plate, a through hole is formed in the cover plate, the cover plate is sleeved on the exhaust pipe and seals the top end of the sleeve pipe through the through hole, and the third coil material layer is pasted on the cover plate.
Optionally, the third coil layer includes a self-adhesive coil layer and a hot-melt coil layer, the self-adhesive coil layer is formed by extending the top of the sleeve pipe, the side wall of the sleeve pipe and the additional waterproof layer to the top surface of the heat-insulating board, and the hot-melt coil layer covers the self-adhesive coil layer.
Optionally, the exhaust pipe further comprises a fixing ring, and the fixing ring is sleeved on the exhaust pipe and tightly hoops the third coil layer on the exhaust pipe.
Optionally, the bottom surfaces of the wing plates and the top surface of the heat-insulation plate are bonded through an adhesive;
and the top edge of the third coil layer is hermetically connected with the outer wall of the exhaust pipe through a sealing material.
Optionally, the first web layer comprises a vapour barrier web layer;
the additional waterproof layer comprises a non-cured rubber asphalt waterproof coating layer and a mesh cloth, and the mesh cloth is embedded into the non-cured rubber asphalt waterproof coating layer.
The utility model has the beneficial effects that:
1. be equipped with the pterygoid lamina on the sleeve pipe outer wall of this scheme, and the top surface and the sleeve pipe outer wall junction of pterygoid lamina adopt the chamfer transition, and the sleeve pipe of this scheme of use need not additionally to set up the chamfer of heated board cutting, has solved when passive form building roof exhaust sleeve pipe adopts the heat preservation to do the chamfer, can't form in succession and fixed difficulty, avoids here waterproof layer stress concentration, takes place the fracture, has improved water-proof effects and construction speed.
2. The waterproof structure of this scheme has solved when adopting the heat preservation to do the chamfer, can't form in succession and the problem of fixed difficulty, not only improves the construction speed, has still solved the percolating water risk at this position to further guaranteed the water-proof effects of roofing, avoid because the hidden danger that exists at this position brings the condition of percolating water for the later stage, lead to the coefficient of heat conductivity increase of roofing heat preservation, thereby influence the coefficient of heat transfer of whole roofing, and then influence the indoor comfortable effect of passive form building.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic structural view showing a waterproof structure of a passive type building roof exhaust pipe according to an embodiment of the present invention.
Description of the reference numerals
1. A mortar layer; 2. a roof panel; 3. a first web layer; 4. a thermal insulation board; 5. adding a waterproof layer; 6. a self-adhesive web layer; 7. hot-melting the coil layer; 8. a sleeve; 9. a cover plate; 10. a thermal insulation material; 11. a fixing ring; 12. sealing paste; 13. an exhaust pipe; 14 adhesive.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
The utility model discloses a sleeve for a passive building roof exhaust pipe, which comprises a barrel and wing plates, wherein the wing plates are arranged on the outer wall of the barrel along the circumferential direction of the barrel, and a chamfer angle is arranged between the top surfaces of the wing plates and the outer wall of the barrel.
Specifically, be equipped with the pterygoid lamina on the sleeve pipe outer wall of this scheme, and the top surface of pterygoid lamina adopts the chamfer transition with sleeve pipe outer wall junction, and the sleeve pipe of this scheme of use need not additionally to set up the chamfer of heated board cutting, has solved when passive form building roof exhaust sleeve pipe adopts the heat preservation to do the chamfer, can't form in succession and fixed difficulty, avoids here waterproof layer stress concentration, takes place the fracture, has improved water-proof effects and construction speed.
As an alternative, the exhaust pipe cover further comprises a cover plate, the cover plate is used for sealing the top end of the cylinder body, a through hole is formed in the cover plate, and the cover plate is sleeved on the exhaust pipe through the through hole.
Specifically, because the biggest painful point of passive building is exactly the solution of cold and hot bridge effect, consequently increase a sleeve pipe in roofing blast pipe position to increase the heat preservation filler material between sleeve pipe and blast pipe, but because the unevenness of the top basic unit of the heat preservation material of packing, intensity is not enough, the phenomenon of hollowing often appears in the sleeve pipe top cover coiled material that causes, so increase a apron with the same material of barrel at the barrel top and be used for increasing the roughness and the intensity of heat preservation material top base plane, the hollowing has been avoided appearing in the coiled material that the barrel top covered, water-proof effects has been improved.
As an alternative, the end face of the top end of the cylinder body inclines from the outer edge of the top end of the cylinder body to the radial inner side of the cylinder body, and the side face of the cover plate inclines from the edge of the top face of the cover plate to the radial inner side of the cover plate;
when the cover plate is arranged at the top end of the barrel, the end face of the top end of the barrel is attached to the side face of the cover plate, and the top face of the cover plate is flush with the top end of the barrel.
Specifically, this structure makes apron embedding barrel top, avoids the top cap drunkenness, improves the roughness at barrel top.
Alternatively, the wing plate and the barrel are integrally formed.
Specifically, the wing plate and the barrel are integrally formed, so that the continuity is good, and the firmness is high.
The utility model also discloses a waterproof structure of the passive building roof exhaust pipe, which comprises the following components:
the first coiled material layer is laid on the roof of the passive building and is turned upwards to the side wall of the exhaust pipe;
in the sleeve, the sleeve is sleeved on the exhaust pipe, the bottom end of the sleeve is connected to the first coil material layer on the roof of the passive building, and the annular space between the sleeve and the exhaust pipe is filled with the heat insulation material;
the insulation board is laid on the first coil layer, inserted below the wing plate of the sleeve and connected to the outer wall of the sleeve, and the bottom surface of the wing plate is connected to the top surface of the insulation board;
the additional waterproof layer extends to the top surface of the insulation board from the outer wall of the sleeve through the top surface of the wing plate;
and the third coil layer extends to the top surface of the temperature plate from the outer wall of the exhaust pipe through the top of the sleeve, the outer wall of the sleeve and the additional waterproof layer.
Specifically, the waterproof construction of this scheme has solved when adopting the heat preservation to do the chamfer, can't form in succession and the problem of fixed difficulty, not only improves the construction speed, has still solved the percolating water risk at this position to further guaranteed the water-proof effects of roofing, avoid because the hidden danger that this position exists brings the condition of percolating water for the later stage, lead to the coefficient of heat conductivity increase of roofing heat preservation, thereby influence the coefficient of heat transfer of whole roofing, and then influence the indoor comfortable effect of passive form building.
As an alternative scheme, the sleeve pipe further comprises a cover plate, a through hole is formed in the cover plate, the cover plate is sleeved on the exhaust pipe through the through hole and seals the top end of the sleeve pipe, and the third coil material layer is pasted on the cover plate.
Specifically, set up the apron, guaranteed the roughness and the firmness at sleeve pipe top, make the third coil stock layer paste and can avoid the hollowing on the apron, improve the mode effect, increase of service life.
As an alternative, the third coil layer comprises a self-adhesive coil layer and a hot-melt coil layer, the self-adhesive coil layer extends to the top surface of the heat-insulating plate from the side wall of the exhaust pipe through the top of the sleeve, the side wall of the sleeve and the additional waterproof layer, and the hot-melt coil layer covers the self-adhesive coil layer.
As an alternative, the exhaust pipe also comprises a fixing ring, and the fixing ring is sleeved on the exhaust pipe and tightly hoops the third coil material layer on the exhaust pipe.
As an alternative scheme, the bottom surfaces of the wing plates and the top surface of the heat-insulation plate are bonded through an adhesive;
the top edge of the third coil layer is hermetically connected with the outer wall of the exhaust pipe through a sealing material.
Optionally, the first web layer comprises a vapour barrier web layer;
the additional waterproof layer comprises a non-cured rubber asphalt waterproof coating layer and a mesh cloth, and the mesh cloth is embedded into the non-cured rubber asphalt waterproof coating layer.
Specifically, the full viscosity of the coil during hot melting and self-adhesion of the coil does not reach 100% of full adhesion, the construction difficulty is increased by adopting the coiled material with the matrix at the detail node, the waterproof quality is not easy to control, the leakage risk exists, the special non-cured rubber asphalt waterproof coating can be fully adhered with the base layer, the heat resistance is 90 ℃, the adhesion on the vertical surface is firm, and the effect of increasing the strength can be achieved by adding the grid cloth.
Examples
Fig. 1 shows a schematic structural diagram of a waterproof structure of a passive building roof exhaust pipe of the present embodiment.
As shown in fig. 1, a mortar layer 1 covers the indoor side of a passive building roof panel 2, and a first coiled material layer 3 is laid on the outdoor side of the roof panel 2 and is turned up to the side wall of an exhaust pipe 13; in this embodiment, the first web layer 3 is a steam-insulating web dedicated for a passive room;
the sleeve 8 comprises an integrally formed barrel body and wing plates, the wing plates are arranged on the outer wall of the barrel body along the circumferential direction of the barrel body, an arc chamfer is arranged between the top surface of the wing plates and the outer wall of the barrel body, the sleeve 8 is sleeved on the exhaust pipe 13, the bottom end of the sleeve 8 is connected to the first coil layer 3 on the roof of the passive building, an annular space between the sleeve 8 and the exhaust pipe 13 is filled with a heat insulation material 10, and the cover plate 9 is sleeved on the exhaust pipe 13 and seals the top end of the sleeve 8; in this embodiment, the end surface of the top end of the cylinder body inclines from the outer edge of the top end of the cylinder body to the radial inner side of the cylinder body, the side surface of the cover plate 9 inclines from the edge of the top surface of the cover plate 9 to the radial inner side of the cover plate 9, when the cover plate 9 is arranged at the top end of the cylinder body, the end surface of the top end of the cylinder body is attached to the side surface of the cover plate 9, and the top surface of the cover plate 9 is flush with the top end of the cylinder body;
the insulation board 4 is laid on the first coil layer 3, inserted below the wing plate of the sleeve 8 and connected to the outer wall of the sleeve 8, and the bottom surface of the wing plate is bonded with the top surface of the insulation board 4 through an adhesive 14;
the additional waterproof layer 5 extends to the top surface of the insulation board 4 from the outer wall of the sleeve 8 through the top surface of the wing plate, in the embodiment, the additional waterproof layer 5 comprises a non-cured rubber asphalt waterproof coating layer and a mesh cloth, and the mesh cloth is embedded in the non-cured rubber asphalt waterproof coating layer;
the self-adhesive coil layer 6 extends to the top surface of the heat-insulation board 4 from the side wall of the exhaust pipe 13 through the cover plate 9, the side wall of the sleeve 8 and the additional waterproof layer 5, and the hot-melt coil layer 7 covers the self-adhesive coil layer 6;
the top edge parallel and level of self-adhesion coil material layer 6 and hot melt coil material layer 7 and with through sealing paste 12 sealing connection between the outer wall of blast pipe 13, fixed ring 11 overlaps and locates on the hot melt coil material layer 7 on blast pipe 13 to tightly bind self-adhesion coil material layer 6 and hot melt coil material layer 7 on blast pipe 13, in this embodiment, fixed ring 11 adopts the ferrule.
The sleeve pipe of passive form roofing is perpendicular riser, and the roofing requires the waterproof layer, the heat preservation, the operation of not permitting wet between the vapour barrier, consequently, can't carry out cement mortar chamfer processing around the sleeve pipe, if adopt the heated board cutting to do the chamfer then can't form the continuity, and fixed difficulty, consequently integrated into one piece sets up the pterygoid lamina on the barrel, and set up circular arc chamfer transition in the junction of barrel and pterygoid lamina, the coiled material of having avoided here to spread promptly takes place stress concentration and not hard up, cause the problem of self-adhesion waterproofing membrane at sleeve pipe root fracture, construction speed has been improved again, waterproof construction effect has been guaranteed again.
The biggest south point of passive buildings is to solve the cold-hot bridge effect, so a sleeve is often added at the exhaust pipe part of the roof, and heat insulation materials are filled between the sleeve and the exhaust pipe. In order to improve the flatness and the strength of the top base surface of the heat-insulating material, the cover plate is additionally arranged at the top of the cylinder body to improve the flatness and the firmness of the top base surface, so that the phenomenon of hollowing when the coiled material is adhered to the top is avoided, and the waterproof effect is improved.
If the root of the sleeve is constructed by adopting the coiled material with the base, the full bonding construction difficulty cannot be realized, and the potential water leakage hazard is easy to appear, so that the special non-cured rubber asphalt waterproof coating is adopted as an additional waterproof layer, the full bonding with the base layer can be realized, the heat resistance is 90 ℃, the vertical surface can be firmly bonded, and the additional grid cloth can play a role in increasing the strength and the toughness.
In passive form ultralow energy consumption building, adopt the waterproof construction of this embodiment, can not only improve the construction speed, can also solve the percolating water hidden danger at this position to further guarantee the water-proof effects of roofing, avoid because there is the condition of percolating water at this position, lead to the coefficient of heat conductivity increase of roofing heat preservation, thereby influence the coefficient of heat transfer of whole roofing, and then influence the indoor comfortable effect of passive form building.
The construction process of the waterproof structure of the embodiment is as follows:
firstly, pouring a roof panel 1, laying a first coiled material layer 3 after a base layer meets the requirements of steam barrier construction, and turning up to 100mm above an exhaust pipe 13;
installing a sleeve 8;
filling a heat insulation material 10 between the sleeve 8 and the exhaust pipe 13, paving the large-surface heat insulation board 4 on the roof, and coating a special adhesive 14 between the superposed position of the bottom surface of the wing plate of the sleeve 8 and the top surface of the heat insulation board 4 to fix the heat insulation board 4;
the top of the sleeve 8 is sealed by a cover plate 9, and a sealing paste 12 is used for sealing between the cover plate 9 and the exhaust pipe 13;
constructing an additional waterproof layer 5, wherein the additional waterproof layer 5 is reinforced by a special non-cured rubber asphalt waterproof coating and is internally attached with non-woven fabrics, and the flat surface and the vertical surface are required to be coated with 250 mm;
constructing a large-surface self-adhesive coil layer 6 and a hot-melt coil layer 7;
the end part is closed up and hooped by a fixing ring 11 (a metal hoop), and the end part is sealed by sealing paste 12.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides a sleeve pipe that is used for passive form building to go out roofing blast pipe which characterized in that, the sleeve pipe includes barrel and pterygoid lamina, the pterygoid lamina is followed the circumference of barrel set up in on the outer wall of barrel, the top surface of pterygoid lamina with be equipped with the chamfer between the outer wall of barrel.
2. The sleeve for the passive building air outlet pipe is characterized by further comprising a cover plate, wherein the cover plate is used for sealing the top end of the cylinder body, a through hole is formed in the cover plate, and the cover plate is sleeved on the air outlet pipe through the through hole.
3. The sleeve for a passive building roof exhaust pipe according to claim 2, wherein the end surface of the cylinder top end is inclined from the outer edge of the cylinder top end to the radial inner side of the cylinder, and the side surface of the cover plate is inclined from the top surface edge of the cover plate to the radial inner side of the cover plate;
when the apron set up in when the top of barrel, the terminal surface on barrel top with the side laminating of apron, just the top surface of apron with the top parallel and level of barrel.
4. The sleeve for a passive building roofing bleed duct of claim 1, wherein the wings are integrally formed with the barrel.
5. The utility model provides a passive form building goes out waterproof construction of roofing blast pipe which characterized in that includes:
the first coiled material layer is laid on the roof of the passive building and is turned upwards to the side wall of the exhaust pipe;
the sleeve according to any one of claims 1 to 4, wherein the sleeve is sleeved on the exhaust pipe and the bottom end of the sleeve is connected to a first coil layer on the roof of the passive building, and an annular space between the sleeve and the exhaust pipe is filled with an insulating material;
the insulation board is laid on the first coil layer, inserted below the wing plate of the sleeve and connected to the outer wall of the sleeve, and the bottom surface of the wing plate is connected to the top surface of the insulation board;
the additional waterproof layer extends to the top surface of the heat-insulation plate from the outer wall of the sleeve through the top surface of the wing plate;
and the third coil layer extends to the top surface of the warm plate from the outer wall of the exhaust pipe through the top of the sleeve, the outer wall of the sleeve and the additional waterproof layer.
6. The waterproof structure of a roof exhaust pipe of a passive building according to claim 5, wherein the sleeve further comprises a cover plate, a through hole is formed in the cover plate, the cover plate is sleeved on the exhaust pipe through the through hole and seals the top end of the sleeve, and the third coil material layer is adhered to the cover plate.
7. The waterproof structure of a passive building roof exhaust pipe according to claim 5, wherein the third roll layer comprises a self-adhesive roll layer and a hot-melt roll layer, the self-adhesive roll layer extends from the side wall of the exhaust pipe to the top surface of the insulation board through the top of the sleeve, the side wall of the sleeve and the additional waterproof layer, and the hot-melt roll layer covers the self-adhesive roll layer.
8. The waterproof structure of a passive building roof exhaust pipe according to claim 5, further comprising a fixing ring, wherein the fixing ring is sleeved on the exhaust pipe and tightly hoops the third coil layer on the exhaust pipe.
9. The waterproof structure of the passive building roof exhaust pipe according to claim 5, wherein the bottom surface of the wing plate is bonded with the top surface of the heat insulation plate through an adhesive;
and the top edge of the third coil layer is hermetically connected with the outer wall of the exhaust pipe through a sealing material.
10. The water resistant construction for a passive building roof vent pipe of claim 5, wherein the first coil layer comprises a vapor barrier coil layer;
the additional waterproof layer comprises a non-cured rubber asphalt waterproof coating layer and a mesh cloth, and the mesh cloth is embedded into the non-cured rubber asphalt waterproof coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121811926.0U CN216007560U (en) | 2021-08-04 | 2021-08-04 | Sleeve and waterproof structure for passive building outlet exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121811926.0U CN216007560U (en) | 2021-08-04 | 2021-08-04 | Sleeve and waterproof structure for passive building outlet exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216007560U true CN216007560U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121811926.0U Active CN216007560U (en) | 2021-08-04 | 2021-08-04 | Sleeve and waterproof structure for passive building outlet exhaust pipe |
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| Country | Link |
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| CN (1) | CN216007560U (en) |
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2021
- 2021-08-04 CN CN202121811926.0U patent/CN216007560U/en active Active
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