CN111934490B - Traction motor ventilation system and waterproof structure and waterproof method thereof - Google Patents
Traction motor ventilation system and waterproof structure and waterproof method thereof Download PDFInfo
- Publication number
- CN111934490B CN111934490B CN202010807742.0A CN202010807742A CN111934490B CN 111934490 B CN111934490 B CN 111934490B CN 202010807742 A CN202010807742 A CN 202010807742A CN 111934490 B CN111934490 B CN 111934490B
- Authority
- CN
- China
- Prior art keywords
- traction motor
- ventilation system
- water
- bottom plate
- wind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides a waterproof structure for a traction motor ventilation system, wherein the traction motor ventilation system comprises a generally horizontally-oriented traction motor air duct allowing wind to pass through, the waterproof structure is arranged on a bottom plate of the traction motor air duct, and the waterproof structure comprises: and a water discharging part for discharging water flowing through the traction motor air duct is arranged. The invention also provides a ventilation system of the traction motor and a waterproof method for the ventilation system of the traction motor. According to the invention, the waterproof structure is arranged in the air duct of the traction motor ventilation system, so that rainwater can be prevented from entering the gear box under any condition, and lubricating oil in the gear box is effectively protected, thereby ensuring the safe operation of the locomotive.
Description
Technical Field
The invention relates to the field of locomotive traction motor ventilation systems, in particular to a waterproof structure for a traction motor ventilation system, a traction motor ventilation system comprising the waterproof structure and a waterproof method for the traction motor ventilation system.
Background
At present, most of traction motor ventilation systems of electric locomotives adopt a forced air cooling mode, and water is mainly prevented through a top cover shutter and a cyclone filter. Although roof shutters and cyclone filters generally have some water resistance, both in the static state and in the dynamic state of the locomotive, 100% water resistance is not guaranteed. Specifically, the structure of the roof blind is shown in fig. 1. The roof louver has a water blocking efficiency of 95% or more when rainwater falls vertically and obliquely (as shown by arrows in the drawing). If rainwater falls at an angle other than the standard angle (specified by 4.3.4 in TB/T2054-2017 locomotive rain test method), especially at an angle close to the horizontal, the water blocking efficiency of the roof louver is reduced, and a large amount of rainwater passes through the gaps between the louvers and passes through the roof louver. The construction of the cyclone filter is shown in fig. 2. The cyclone filter consists of an inner cylinder 41 and an outer cylinder 42, wherein the outer cylinder 42 is provided with a guide vane 43, a dust exhaust branch 44 is arranged between the inner cylinder 41 and the outer cylinder 42, and the dust exhaust branch 44 can exhaust dust and rainwater out of the vehicle. When the traction motor ventilator does not work, the water blocking efficiency of the cyclone filter is 50%, and when the traction motor ventilator works, the water blocking efficiency of the cyclone filter is 95%.
In summary, the comprehensive water blocking efficiency of the traction motor ventilation system of the existing electric locomotive reaches 97.5% when the traction motor ventilator works, and is even lower than 50% when the traction motor ventilator does not work. Therefore, the ventilation system of the traction motor of the conventional electric locomotive can not completely prevent rainwater from entering the gearbox, particularly under the static condition, 100% of rainwater can not be prevented from entering the gearbox when extreme severe weather occurs, when accumulated water at the air inlet of the gearbox reaches a certain degree, the accumulated water can bypass the labyrinth seal and enter the gearbox through the oil return pipe of the gearbox, the lubricating oil water content of the gearbox exceeds the standard, the lubricating effect of the gearbox is influenced, and the gear in the gearbox is seriously possibly subjected to abnormal wear or even mechanical damage.
Based on this, the prior art still remains to be improved.
Disclosure of Invention
The invention aims to provide a waterproof structure for a ventilation system of a traction motor, the ventilation system of the traction motor comprising the waterproof structure and a waterproof method for the ventilation system of the traction motor, and aims to solve the technical problem that the existing ventilation system of the traction motor cannot completely avoid rainwater from entering a gear box to cause potential safety hazards to the operation of a locomotive.
A first aspect of the present invention provides a waterproof structure for a traction motor ventilation system including a generally horizontally-oriented traction motor air duct that allows wind to pass therethrough, the waterproof structure being provided on a floor of the traction motor air duct, the waterproof structure including: and a water discharging part for discharging water flowing through the traction motor air duct is arranged.
According to an embodiment of the present invention, the drain part includes a drain hole provided through the bottom plate and a drain pipe connected to the drain hole.
According to an embodiment of the present invention, a dimension of the drain hole in a direction perpendicular to a wind flowing direction is equal to a dimension of the bottom plate in a direction perpendicular to the wind flowing direction.
According to an embodiment of the present invention, the waterproof structure further includes: and a water blocking part for blocking the water from passing through is arranged, and the water blocking part is arranged at the downstream of the water discharging part along the flowing direction of the wind.
According to one embodiment of the invention, the water retaining part is provided as an arc-shaped water retaining strip.
According to one embodiment of the invention, the traction motor air duct further comprises a side plate connected with the bottom plate, and the arc-shaped water bar is hermetically connected to the bottom plate and the side plate.
According to an embodiment of the present invention, the drain part includes a drain hole provided through the bottom plate and a drain pipe connected to the drain hole, wherein a dimension of the drain hole in a direction perpendicular to a wind flowing direction is smaller than a dimension of the bottom plate in the direction perpendicular to the wind flowing direction.
According to one embodiment of the invention, the water dam is formed by a local elevation of the floor.
A second aspect of the present invention provides a traction motor ventilation system, comprising: a generally horizontally oriented traction motor duct that allows wind to pass through; and the waterproof structure of setting on the bottom plate in traction motor wind channel, waterproof structure includes: and a water discharging part for discharging water flowing through the traction motor air duct is arranged.
A third aspect of the invention provides a method of waterproofing a traction motor ventilation system, comprising: and arranging a waterproof structure on a bottom plate of the generally horizontally-oriented traction motor air duct of the traction motor ventilation system, wherein the arranging of the waterproof structure comprises arranging a drainage part for draining water flowing through the traction motor air duct.
By adopting the technical scheme, the invention at least has the following beneficial effects:
according to the invention, the waterproof structure is arranged in the air duct of the traction motor of the ventilation system of the traction motor, so that a 100% water-blocking effect can be achieved on the premise of not influencing the ventilation efficiency, rainwater can be prevented from entering the gear box under any conditions of the static state of the locomotive and the dynamic state of the locomotive, lubricating oil in the gear box is effectively protected, and the safe operation of the locomotive is ensured. In addition, the waterproof structure and the waterproof method provided by the invention are simple to implement and low in cost, do not need to change the general structure of the original traction motor ventilation system (particularly the mechanism of the original top cover shutter and the original traction motor ventilation system), and do not have adverse effect on the passing of cooling wind.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 shows a cross-sectional view of a canopy blind;
FIG. 2 shows a cross-sectional view of a cyclone filter;
FIG. 3 shows a schematic cross-sectional view of a traction motor ventilation system provided by the present invention;
FIG. 4 shows a partial enlarged view of a portion of FIG. 3;
fig. 5 is a partially enlarged view of a portion of fig. 4, showing a waterproof structure provided according to a first embodiment of the present invention;
FIG. 6 is a top view of the portion shown in FIG. 5;
FIG. 7 shows an air flow field analysis spectrum of the traction motor ventilation system shown in FIG. 3;
fig. 8 is a schematic sectional view of a waterproof structure provided according to a second embodiment of the invention;
fig. 9 is a schematic sectional view of a waterproof structure provided according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
An aspect of the present invention relates to a waterproof structure for a traction motor ventilation system and a traction motor ventilation system including the same. The traction motor ventilation system includes a generally horizontally oriented traction motor air duct that allows wind to pass through. The waterproof structure is arranged on a bottom plate of the traction motor air duct.
For ease of understanding, the structure of the traction motor ventilation system is generally described below with reference to FIG. 3: the traction motor ventilation system comprises a top cover shutter 1, a top cover transition air duct 2, a traction motor ventilator 3, a cyclone filter 4, a traction motor air duct 5, a soft air duct 6, a gear box 7 and a traction motor (not shown) connected with the gear box 7 which are sequentially arranged. Cooling air (i.e., outside cooling air) is sucked by the traction motor ventilator 3 through the top cover shutter 1 and the top cover transition air duct 2, enters the gear box 7 through the traction motor ventilator 3, the cyclone filter 4, the traction motor air duct 5 and the soft air duct 6, and finally enters the traction motor to cool the traction motor. While the general structure of the traction motor ventilation system is shown in the illustrated embodiment for ease of understanding, it should be understood that the inventive concepts of the present invention are not limited to a particular configuration of traction motor ventilation system, but may be applied to any other configuration of traction motor ventilation system, so long as it includes a generally horizontally oriented traction motor air duct.
The features of the waterproof structure provided in the present application will be described in detail below with reference to fig. 4 to 9. Wherein figures 4-6 relate to a first embodiment of the water-repellent structure, figure 8 relates to a second embodiment of the water-repellent structure, and figure 9 relates to a third embodiment of the water-repellent structure.
Referring first to fig. 4 to 6, the waterproof structure 10 includes a drain portion provided for draining water flowing through the traction motor duct 5 and a water blocking portion 16 provided for blocking the passage of water, the water blocking portion 16 being provided downstream of the drain portion in the wind flowing direction a. In other words, the water stop 16 is disposed between the drain and the air outlet side of the traction motor air duct 5. In this embodiment, the drain portion includes a drain hole 12 provided vertically through the bottom plate 52 (i.e., through the thickness of the bottom plate 52) and a drain pipe 14 connected to the drain hole 12, thereby draining the water flowing through the traction motor duct 5 to the outside of the locomotive through the drain hole 12 and the drain pipe 14. As clearly shown in fig. 6, the dimension of the drain hole 12 in the direction perpendicular to the wind flowing direction a is smaller than the dimension of the bottom plate 52 in the direction perpendicular to the wind flowing direction a, and the dimension of the drain hole 12 in the wind flowing direction a is smaller than the dimension of the bottom plate 52 in the wind flowing direction a. Although in the illustrated embodiment the drain hole 12 is provided in a circular shape, it should be understood that in other cases the drain hole 12 may be provided in other shapes than a circular shape, for example, an oval shape, a rectangular shape, etc. In this embodiment, the water dam 16 is provided as an arc-shaped water bar extending across the width of the bottom plate 52, that is, the dimension of the arc-shaped water bar in the direction perpendicular to the wind flowing direction a is equal to the dimension of the bottom plate 52 in the direction perpendicular to the wind flowing direction a (as shown in fig. 6). The arc-shaped water bars are sealingly connected to the bottom plate 52 and the side plates 54, 56 of the traction motor duct 5. Specifically, the arc-shaped water bar includes a body (shown in fig. 5) bent in a circular arc shape having first and second ends along the wind flowing direction a and third and fourth ends along a direction perpendicular to the wind flowing direction a. With first and second ends being sealingly attached (e.g., welded) to the bottom panel 52 and third and fourth ends being sealingly attached (e.g., welded) to the side panels 54, 56, respectively. The bottom plate 52, top plate and side plates 54, 56 of the traction motor duct 5 are connected to form a passage for allowing wind to pass. In an embodiment of the invention, the traction motor wind tunnel 5 has a rectangular cross-section (i.e. the cross-sectional shape perpendicular to the wind flow direction is rectangular).
In a specific example, the height c of the arc-shaped water bar is set to be 15-40 mm (c is too small and may not block water, c is too large and has an influence on the ventilation efficiency of the air duct), the distance b between the drain hole 12 and the arc-shaped water bar is 60mm, the diameter d of the drain pipe 14 welded at the position, corresponding to the drain hole 12, outside the bottom plate 52 of the traction motor air duct 5 is 20-40 mm (d is too small and may cause difficulty in draining water or even overflow the water-blocking part, d is too large and may cause air leakage of the air duct to seriously affect cooling), and the length a of the drain pipe 14 is 40-80 mm (a is too small and may affect the flow field change in the air duct, and a is too large and causes too small distance from the bogie and affects the driving safety).
Under the condition that the first few waterproof (i.e. top cover shutter, cyclone filter) of traction motor ventilation system became invalid, in case rainwater got into traction motor wind channel 5, rainwater can follow wind flow direction A and flow along bottom plate 52, when flowing to the position of manger plate portion, rainwater can be blocked by manger plate portion and stop in the air inlet side of manger plate portion, when rainwater of manger plate portion air inlet side accumulated to certain extent, ponding can in time be discharged through the wash port, and can not walk over manger plate portion and continue to advance.
Fig. 7 shows an air flow field analysis spectrum of a traction motor ventilation system provided by the present invention. It can be seen that the added waterproof structure has little influence on the ventilation efficiency in the traction motor air duct and can be ignored, wherein different colors represent the flow velocity of air at different positions in the traction motor ventilation system.
Referring next to fig. 8, the waterproof structure 10' includes only a drain portion provided for draining water flowing through the traction motor duct 5. In this embodiment, the drain part includes a drain hole 12 'provided through the base plate 52, a drain groove 13' provided outside the base plate 52 in alignment with the drain hole 12', and a drain pipe 14' connected to the drain groove 13', thereby draining the water flowing through the traction motor duct 5 to the outside of the locomotive through the drain hole 12', the drain groove 13', and the drain pipe 14'. In this embodiment, the dimension of the drain hole 12 'in the direction perpendicular to the wind flow direction is equal to the dimension of the bottom plate 52 in the direction perpendicular to the wind flow direction, that is, the drain hole 12' extends across the entire width of the bottom plate 52. If rainwater enters the traction motor air duct 5, the rainwater directly enters the drainage groove 13 'through the drainage hole 12' and cannot reach the bottom plate on the other side of the drainage hole, so that the water retaining and draining effects are achieved, and the influence on cooling air is ignored.
Referring finally to fig. 9, the waterproofing structure 10 "differs from the waterproofing structure 10 only in that its water-retaining portion is formed by a partial elevation of the bottom plate 52, that is, the bottom plate 52 is partially upwardly convex to block the passage of water by itself. Other aspects of the waterproof structure 10 ″ are the same as the waterproof structure 10, and for the sake of brevity, the description thereof will not be repeated.
Another aspect of the present invention provides a waterproofing method for a traction motor ventilation system, the waterproofing method comprising: a waterproof structure is arranged on a bottom plate of a traction motor air duct of the traction motor ventilation system, which is oriented horizontally in general. Wherein setting up waterproof construction includes setting up the drainage part that is used for making the water discharge through the traction motor wind channel on the bottom plate. The drain part is arranged on the bottom plate, and a drain pipe is connected to the position, corresponding to the drain hole, on the outer side of the bottom plate. Set up waterproof construction and still include: a water blocking portion for blocking the passage of water is provided on the bottom plate downstream of the water discharge portion in the direction of wind flow. The step of arranging the water retaining part specifically comprises the step of respectively welding water retaining strips stretching across the width of the bottom plate on the bottom plate and the side plates of the traction motor air duct, or enabling a part of the bottom plate stretching across the whole width of the bottom plate to protrude upwards.
In conclusion, the waterproof structure is arranged in the traction motor air duct of the traction motor ventilation system, so that the aim of 100% waterproofing of the traction motor ventilation system can be fulfilled by adopting a simple structure and low cost under the condition of not changing the structure of the top cover louver and the structure of the traction motor ventilator, and meanwhile, the passing of cooling air is not influenced.
The above-described embodiments are possible examples of implementations and are presented merely for a clear understanding of the principles of the invention. Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (7)
1. The utility model provides a waterproof construction for traction motor ventilation system, traction motor ventilation system including the top cap shutter that sets gradually, top cap transition wind channel, traction motor ventilation blower, cyclone, traction motor wind channel, soft wind channel, gear box and with the traction motor that the gear box is connected, the wind via is used in the cooling top cap shutter top cap transition wind channel quilt the traction motor ventilation blower inhales, through the traction motor ventilation blower cyclone the traction motor wind channel the soft wind channel gets into the gear box gets into at last traction motor, right traction motor cools off, its characterized in that, the permission cooling is used the wind to pass through traction motor wind channel is general horizontal orientation, waterproof construction sets up on the bottom plate in traction motor wind channel, waterproof construction includes:
a water discharging part for discharging water flowing through the traction motor air duct;
a water retaining part for blocking water from passing is arranged, the water retaining part is arranged at the downstream of the water discharging part along the flowing direction of wind, the water retaining part is an arc-shaped water retaining strip,
the traction motor air duct also comprises a side plate connected with the bottom plate, and the arc-shaped water retaining strip is hermetically connected to the bottom plate and the side plate.
2. The waterproof structure for a traction motor ventilation system according to claim 1, wherein the drain portion includes a drain hole provided through the bottom plate and a drain pipe connected to the drain hole.
3. The waterproof structure for a traction motor ventilation system according to claim 2, wherein a dimension of the drain hole in a direction perpendicular to a wind flowing direction is equal to a dimension of the bottom plate in a direction perpendicular to the wind flowing direction.
4. The waterproof structure for a traction motor ventilation system according to claim 1, wherein the drain portion includes a drain hole provided through the bottom plate and a drain pipe connected to the drain hole, wherein a dimension of the drain hole in a direction perpendicular to a wind flowing direction is smaller than a dimension of the bottom plate in a direction perpendicular to the wind flowing direction.
5. The waterproof structure for a traction motor ventilation system according to claim 1, wherein the water blocking portion is formed by a partially raised portion of the floor panel.
6. A traction motor ventilation system comprising the waterproof structure for a traction motor ventilation system according to claim 1.
7. A waterproof method for a traction motor ventilation system, wherein the traction motor ventilation system comprises a top cover shutter, a top cover transition air channel, a traction motor ventilator, a cyclone filter, a traction motor air channel, a soft air channel, a gear box and a traction motor connected with the gear box, the top cover shutter and the top cover transition air channel are sequentially arranged, cooling air is sucked by the traction motor ventilator, and the cooling air enters the gear box through the traction motor ventilator, the cyclone filter, the traction motor air channel and the soft air channel and finally enters the traction motor to cool the traction motor, and the waterproof method is characterized by comprising the following steps:
a water-proof structure is arranged on the bottom plate of the generally horizontally oriented traction motor air duct of the traction motor ventilation system,
the water-proof structure comprises a water discharging part and a water retaining part, wherein the water discharging part is used for discharging water flowing through the traction motor air duct, the water retaining part is used for blocking water from passing through, the water retaining part is arranged at the downstream of the water discharging part along the air flowing direction, the water retaining part is an arc-shaped water retaining strip, the traction motor air duct further comprises a side plate connected with the bottom plate, and the arc-shaped water retaining strip is connected to the bottom plate and the side plate in a sealing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807742.0A CN111934490B (en) | 2020-08-12 | 2020-08-12 | Traction motor ventilation system and waterproof structure and waterproof method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807742.0A CN111934490B (en) | 2020-08-12 | 2020-08-12 | Traction motor ventilation system and waterproof structure and waterproof method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111934490A CN111934490A (en) | 2020-11-13 |
| CN111934490B true CN111934490B (en) | 2022-12-27 |
Family
ID=73312021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807742.0A Active CN111934490B (en) | 2020-08-12 | 2020-08-12 | Traction motor ventilation system and waterproof structure and waterproof method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111934490B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003011656A (en) * | 2001-06-29 | 2003-01-15 | Calsonic Kansei Corp | Vehicular air-conditioner |
| CN200978701Y (en) * | 2006-11-17 | 2007-11-21 | 中国南车集团戚墅堰机车车辆厂 | Water-proof gas-discharging cover for internal combustion engine |
| CN201610134U (en) * | 2010-03-17 | 2010-10-20 | 南车株洲电力机车有限公司 | Rain shield and drainage device of locomotive air duct |
| CN206171457U (en) * | 2016-10-31 | 2017-05-17 | 中车株洲电力机车有限公司 | Traction motor ventilation and cooling system for locomotive |
| CN209278176U (en) * | 2018-12-06 | 2019-08-20 | 株洲联诚集团控股股份有限公司 | Mining machinery trailer system cooling fan |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4421083B2 (en) * | 2000-06-12 | 2010-02-24 | アスモ株式会社 | Brushless motor |
-
2020
- 2020-08-12 CN CN202010807742.0A patent/CN111934490B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003011656A (en) * | 2001-06-29 | 2003-01-15 | Calsonic Kansei Corp | Vehicular air-conditioner |
| CN200978701Y (en) * | 2006-11-17 | 2007-11-21 | 中国南车集团戚墅堰机车车辆厂 | Water-proof gas-discharging cover for internal combustion engine |
| CN201610134U (en) * | 2010-03-17 | 2010-10-20 | 南车株洲电力机车有限公司 | Rain shield and drainage device of locomotive air duct |
| CN206171457U (en) * | 2016-10-31 | 2017-05-17 | 中车株洲电力机车有限公司 | Traction motor ventilation and cooling system for locomotive |
| CN209278176U (en) * | 2018-12-06 | 2019-08-20 | 株洲联诚集团控股股份有限公司 | Mining machinery trailer system cooling fan |
Non-Patent Citations (1)
| Title |
|---|
| SS_(7E)型电力机车通风道进水分析及防治;王家胤;《铁道机车车辆工人》;20100131(第01期);第14-17页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111934490A (en) | 2020-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201276799Y (en) | Shutter type rainproof ventilating skylight | |
| CN103206762B (en) | Structural waterproof parallel air flue type natural ventilator | |
| CN109138789A (en) | A kind of casement window drainage system and casement window | |
| CN111934490B (en) | Traction motor ventilation system and waterproof structure and waterproof method thereof | |
| CN211731587U (en) | Ventilation cover plate, vehicle drainage assembly and vehicle | |
| CN106614009A (en) | Novel wet curtain | |
| CN212772462U (en) | Integrated assembly type comprehensive pipe gallery ventilation equipment | |
| CN211335545U (en) | Skylight structure of effective drainage under negative pressure condition and car thereof | |
| CN205502936U (en) | Photovoltaic power plant is shutter for box | |
| CN216508894U (en) | Horizontal installation shutter | |
| CN209603811U (en) | A kind of casement window drainage system and casement window | |
| CN2869396Y (en) | Air-changing fan waterproofing structure | |
| CN219431722U (en) | Waterproof bridge cut-off aluminium alloy | |
| CN216277588U (en) | Sliding window rail sealing and drainage structure | |
| CN221652009U (en) | Dustproof rainproof air inlet structure and energy storage cabinet | |
| CN220700844U (en) | Ventilation module assembly and vehicle | |
| CN215108550U (en) | Louver strip and louver type opening and closing door | |
| CN221220295U (en) | Casement window with hide drainage function | |
| TW201420870A (en) | Anti-typhoon blinds | |
| CN215595406U (en) | Double-layer ventilation rainproof louver | |
| CN221346183U (en) | Improved anti-backflow hood | |
| CN220059369U (en) | Window drainage structure | |
| CN218117644U (en) | Waterproof window body and window | |
| CN219528835U (en) | Frame strip and evagination formula ventilation window | |
| CN207179973U (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |